U.S. patent application number 10/865503 was filed with the patent office on 2005-01-27 for fluid system for conduit expansion and mobile arrangement therefor.
This patent application is currently assigned to Underground Solutions Technologies Group, Inc.. Invention is credited to Marti, Thomas, Smith, Mark A., St. Onge, Bryan, St. Onge, Henri.
Application Number | 20050016608 10/865503 |
Document ID | / |
Family ID | 33545330 |
Filed Date | 2005-01-27 |
United States Patent
Application |
20050016608 |
Kind Code |
A1 |
Smith, Mark A. ; et
al. |
January 27, 2005 |
Fluid system for conduit expansion and mobile arrangement
therefor
Abstract
Disclosed is a fluid system for conduit expansion. The fluid
system includes a fluid processing system and a fluid injection
source for injecting fluid into a conduit expansion system. In
addition, a fluid recycle return transfers spent or used fluid back
from the conduit expansion system to the fluid processing system.
In addition, the fluid processing system is in communication with
the fluid source for supplying fluid into the fluid processing
system. The fluid system may be positioned on or within a mobile
unit, such that the fluid system is transportable.
Inventors: |
Smith, Mark A.; (Natrona
Heights, PA) ; Marti, Thomas; (Mars, PA) ; St.
Onge, Bryan; (Hastings, CA) ; St. Onge, Henri;
(Hastings, CA) |
Correspondence
Address: |
WEBB ZIESENHEIM LOGSDON ORKIN & HANSON, P.C.
700 KOPPERS BUILDING
436 SEVENTH AVENUE
PITTSBURGH
PA
15219
US
|
Assignee: |
Underground Solutions Technologies
Group, Inc.
Sarver
PA
|
Family ID: |
33545330 |
Appl. No.: |
10/865503 |
Filed: |
June 10, 2004 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
60478508 |
Jun 13, 2003 |
|
|
|
60478513 |
Jun 13, 2003 |
|
|
|
Current U.S.
Class: |
138/98 |
Current CPC
Class: |
F16L 55/165 20130101;
F16L 55/1654 20130101 |
Class at
Publication: |
138/098 |
International
Class: |
F16L 055/16 |
Claims
We claim:
1. A fluid system for use with a conduit expansion system,
comprising: a fluid processing system in fluid communication with
the conduit expansion system, the fluid processing system
including: (i) a fluid injection source configured to inject fluid
from the fluid processing system to the conduit expansion system;
and (ii) a fluid recycle return configured to recycle fluid from
the conduit expansion system to the fluid processing system; and a
fluid source in fluid communication with the fluid processing
system and configured to provide fluid to the fluid processing
system.
2. The fluid system of claim 1, wherein the fluid is water.
3. The fluid system of claim 2, wherein the water has an elevated
temperature.
4. The fluid system of claim 3, wherein the water is of sufficient
temperature to effect expansion of a liner conduit within a host
conduit in the conduit expansion system.
5. The fluid system of claim 3, wherein the water has a temperature
of at least 125.degree. F. prior to injection from the fluid
processing system to the conduit expansion system via the fluid
injection source.
6. The fluid system of claim 3, wherein the water has a temperature
in the range of about 125.degree. F. to about 220.degree. F. prior
to injection from the fluid processing system to the conduit
expansion system via the fluid injection source.
7. The fluid system of claim 1, wherein the fluid processing system
includes a fluid heater configured to heat the fluid recycled from
the conduit expansion system via the fluid recycle return.
8. The fluid system of claim 7, wherein the fluid processing system
includes a fluid vessel in fluid communication with the fluid
source and configured to transfer fluid through the fluid
processing system through an expansion pump.
9. The fluid system of claim 8, wherein the fluid exiting the
expansion pump is combined with the fluid exiting the fluid heater
prior to injection into the conduit expansion system.
10. The fluid system of claim 1, wherein the fluid processing
system includes a circulation pump configured to inject water into
the conduit expansion system via the fluid injection system.
11. The fluid system of claim 1, wherein the fluid processing
system includes a bleed line for removal of fluid from the fluid
processing system and reduction of pressure in the fluid processing
system.
12. The fluid system of claim 1, wherein the fluid source is at
least one of a fire hydrant, a water truck, a water tank and a
fluid storage device.
13. The fluid system of claim 1, wherein the fluid processing
system includes a control mechanism configured to at least one of
monitor and control at least one of: (i) at least one component in
at least one of the fluid processing system, the fluid source and
the conduit expansion system; (ii) equipment in at least one of the
fluid processing system, the fluid source and the conduit expansion
system; (iii) a parameter of at least one of the fluid processing
system, the fluid source and the conduit expansion system; and (iv)
a physical characteristic of at least one of the fluid processing
system, the fluid source and the conduit expansion system.
14. The fluid system of claim 13, wherein at least one of the fluid
processing system and the fluid source include at least one
measurement device configured to measure at least one physical
characteristic.
15. The fluid system of claim 14, wherein the at least one
measurement device is in communication with the control mechanism
in at least one of a wireless and a hardwired format.
16. The fluid system of claim 15, wherein the at least one
measurement device is controlled by the control mechanism.
17. The fluid system of claim 13, wherein the control mechanism is
at least one of a personal computer, a laptop, a PDA, a printed
circuit board, a computerized mechanism and a means for automatic
control of at least one component of at least one of the fluid
processing system, the fluid source and the conduit expansion
system.
18. The fluid system of claim 1, wherein at least one of the fluid
source and the fluid processing system is positioned on a mobile
unit.
19. The fluid system of claim 18, wherein the mobile unit includes
a platform configured to support at least one component of at least
one of the fluid source and the fluid processing system.
20. The fluid system of claim 19, wherein the mobile unit includes
a platform configured to provide access to the platform.
21. The fluid system of claim 19, wherein the platform is a
chassis-type structure formed of rigid material rated to sustain
loads imposed by the mobile unit at specified speeds.
22. The fluid system of claim 21, wherein the chassis includes at
least one hook positioned on at least one of a front bumper portion
of the chassis and a rear bumper portion of the chassis.
23. The fluid system of claim 18, wherein the mobile unit is a
vehicle.
24. The fluid system of claim 21, wherein the vehicle is a
truck.
25. The fluid system of claim 18, wherein the mobile unit includes
at least one safety device.
26. The fluid system of claim 23, wherein the at least one safety
device is an emergency shutdown control system, a non-skid
self-draining surface, an automatic fire suppression system, an air
separator, a flame detection circuit, an air flow monitor, a water
flow monitor, an exhaust spark arrester, a stack over temperature
switch, and a device to prevent unburned fuel accumulation.
27. A method of providing fluid to a conduit expansion system,
comprising the steps of: providing fluid from a fluid source to a
fluid processing system; and injecting the fluid into the conduit
expansion system.
28. The method of claim 27, further comprising the step of
recycling the fluid from the conduit expansion system to the fluid
processing system.
29. The method of claim 27, further comprising the step of heating
the fluid prior to injection into the conduit expansion system.
30. The method of claim 27, wherein the fluid is water.
31. The method of claim 30, wherein the water has an elevated
temperature.
32. The method of claim 31, wherein the water is of sufficient
temperature to effect expansion of a liner conduit within a host
conduit in the conduit expansion system.
33. The method of claim 31, wherein the water has a temperature of
at least 125.degree. F. prior to injection from the fluid
processing system to the conduit expansion system via the fluid
injection source.
34. The method of claim 31, wherein the water has a temperature in
the range of about 125.degree. F. to about 220.degree. F. prior to
injection from the fluid processing system to the conduit expansion
system via the fluid injection source.
35. A fluid system for use with a conduit expansion system,
comprising: a fluid processing system in fluid communication with
the conduit expansion system, the fluid processing system
including: (i) a fluid injection source configured to inject fluid
from the fluid processing system to the conduit expansion system;
and (ii) a fluid recycle return configured to recycle fluid from
the conduit expansion system to the fluid processing system; a
fluid source in fluid communication with the fluid processing
system and configured to provide fluid to the fluid processing
system; and a mobile unit having a platform configured to support
at least one component of at least one of the fluid source and the
fluid processing system.
36. The fluid system of claim 35, wherein the mobile unit is a
vehicle.
37. The fluid system of claim 36, wherein the vehicle is a truck.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application takes priority from U.S. Provisional Patent
Application Nos. 60/478,508 and 60/478,513, both filed Jun. 13,
2003, and both of which are incorporated herein by reference in
their entirety.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates generally to systems for
expanding conduit, such as polyvinyl chloride piping, and in
particular to a fluid processing system for injecting and recycling
fluid to and from a conduit expansion system, and to a mobile or
transportable arrangement and fluid processing system.
[0004] 2. Description of Related Art
[0005] Conduit systems are used extensively throughout the world in
order to transfer or convey material, such as water and other
fluids, from location to location for distribution throughout the
system. For example, extensive conduit systems are used to
distribute water to both residences and businesses for use and
further processes. Typically, such conduit or piping systems are
located underground, as aboveground piping would be both unsightly
and intrusive.
[0006] Typical water conduit systems transport material through
pipe, e.g., cast iron, ductile iron, reinforced concrete,
cement-asbestos, etc., buried underground with the branches
extending in various directions in order to reach the end user.
Normally, after many years of use, or for some other reason, the
present piping fails and begins to leak, thereby reducing line
pressure and unnecessarily allowing water to leak into the area
surrounding the piping. Such leaks not only affect the system, but
also increase the processing costs of the supplier, which, in turn,
increases the end user costs. Therefore, these leaks must be
quickly repaired and preventative measures taken to ensure that
further leakage is prevented.
[0007] Due to the underground positioning of the conduit system,
repairing a leaking pipe is particularly labor intensive and time
consuming. Trenches must be dug along the pipeline to locate the
leak and effectively repair it prior to putting the pipe back in
service. Various lining systems have been developed according to
the prior art in an attempt to seal a leaking pipe or a pipe that
has fallen into disrepair, whether to repair a present crack or to
preventatively ensure against future cracks or breaks. In addition,
the use of a much smaller diameter pipe within the larger diameter
cracked or broken pipe has been used. However, this merely replaces
the problem of a cracked outer pipe with a cracked or otherwise
leaking inner pipe. Still further, using such a pipe-in-pipe system
drastically reduces the flow through the conduit system and
evidences unwanted and varying pressure parameters.
[0008] To that end, a pipe liner and method of installation have
been developed, as disclosed in U.S. Pat. No. 5,794,662 to St. Onge
et al., specifically directed to pressurized pipeline applications.
The St. Onge patent is directed to a method of relining sewer
lines, water lines or gas lines, and uses a segmented liner of
reduced size relative to the pipe being relined. However, as
opposed to merely leaving the small diameter liner conduit within
the large diameter outer conduit, the method of the St. Onge patent
uses heat and/or pressure to mold the reduced size pipe to the
shape of the pipe being relined. In particular, the inner or liner
conduit is a thermoplastic pipe, typically a polyvinyl chloride
(PVC) pipe that, when exposed to heat or pressure, expands and
molds against the inside of an existing conduit to effect the
relining of it. This process allows for both the lining of the
entire length of pipe or only a portion of it that is damaged,
which is typically referred to as "spot repair."
[0009] According to the St. Onge patent, once the length of the
liner conduit is inserted into the existing or host conduit, the
liner conduit is plugged at either end and exposed to steam under
pressure to heat the liner conduit along its length and apply
pressure, which urges it to expand and contact the interior walls
of the surrounding host conduit. Once the liner conduit has fully
expanded to conform to the interior surface of the existing
conduit, it is cooled and the plugs are removed. The resulting
expanded liner conduit conforms to the walls of the host conduit,
thereby preventing any further leakage. Also, the method of the St.
Onge patent requires only pits to be dug at either end of the
section to be repaired.
[0010] While the St. Onge patent represents an advance in the art
of relining or repairing underground conduit systems, there is room
in the art for additional improvements and advancements. Further,
the injection or insertion of material or objects into a conduit,
for use in repairing or replacing damaged pipe, is known in the
art. For example, see U.S. Pat. No. 6,228,312 to Boyce; U.S. Pat.
No. 5,503,190 to Kamiyama et al.; U.S. Pat. No. 5,490,964 to
Kamiyama et al.; U.S. Pat. No. 5,225,121 to Yokoshima; U.S. Pat.
No. 6,050,300 to Schwert et al.; U.S. Pat. No. 4,361,451 to Renaud;
U.S. Pat. No. 6,539,979 to Driver; U.S. Pat. No. 5,399,301 to
Menendez et al.; U.S. Pat. No. 5,816,293 to Kiest, Jr.; U.S. Pat.
No. 5,346,658 to Gargiulo; and U.S. Pat. No. 6,093,363 to Polivka.
However, the use of heat and/or pressure includes various problems
that require a solution. Typically, steam and compressed air are
injected in the liner conduit, and this has been successfully
accomplished in small sizes in a safe manner. However, as the scale
of the process increases, it becomes obvious that the energy from
compressible gases in an extended large diameter pipe could be
extremely dangerous. In addition, this steam/air injection has
little reaction time to respond to process upsets. Still further,
the prior art systems do not teach the use of fluid processing
system that is integral with and operational in connection with a
conduit expansion process.
[0011] There also remains a need for mobilizing or otherwise
providing an ability to transport equipment utilized in the conduit
expansion process in a mobile manner. Various prior art systems
have been provided that mobilize various portions of a fluid
system, for example U.S. Pat. Nos. 6,416,692 to Iwasaki-Higbee;
U.S. Pat. No. 5,924,455 to Jo et al.; U.S. Pat. No. 5,816,293 to
Kiest, Jr.; U.S. Pat. No. 5,501,248 to Kiest, Jr.; U.S. Pat. No.
6,050,300 to Schwert et al.; U.S. Pat. No. 6,539,979 to Driver; and
U.S. Pat. No. 5,601,763 to Hunter et al. However, these systems do
not allow for a transportable and integrated fluid expansion
system. Thus, a need remains for a conduit expansion system that
can be assembled on a mobile platform to allow conduit expansion to
be routinely done at project locations.
SUMMARY OF THE INVENTION
[0012] It is, therefore, an object of the present invention to
provide a fluid system for conduit expansion that overcomes the
deficiencies of the prior art. It is another object of the present
invention to provide a fluid system for conduit expansion that
includes a controlled and safe injection of fluid material from a
fluid processing system to a conduit expansion system. It is a
still further object of the present invention to provide a fluid
system for conduit expansion that has inherent stability greater
than the prior art. It is yet another object of the present
invention to provide a fluid system for conduit expansion that
provides uniform expansion of the liner conduit along the length of
the expanded liner conduit. It is another object of the present
invention to provide a mobile conduit expansion system that
overcomes the deficiencies of the prior art. It is a further object
of the present invention to provide a system and arrangement for
conduit expansion that uses, for example, hot water, that is mobile
and easily transportable to a repair site. It is a still further
object of the present invention to provide a system and arrangement
for conduit expansion that is mobile and allows for a consistent
and repeatable conduit expansion process.
[0013] In one preferred and non-limiting embodiment, the present
invention is directed to a fluid system for conduit expansion for
expanding a liner conduit within a host conduit, specifically where
the liner conduit is expanded within the host conduit and pressed
against an inside wall of the host conduit. The fluid system is a
fluid processing system having a fluid injection source for
injecting a fluid, such as water, into the conduit expansion
system, typically the inside of the liner conduit. In addition, the
system includes a fluid recycle return from the conduit expansion
system for reprocessing in the fluid processing system. A fluid
source provides water to the fluid processing system for further
processing and subsequent injection into the conduit expansion
system.
[0014] In another preferred and non-limiting embodiment, the
present invention is directed to a mobile fluid system for use in
connection with a conduit expansion system for expanding a liner or
conduit within a host conduit. The mobile system includes a mobile
unit having a platform upon which to include equipment and is
capable of transporting equipment for a conduit expansion process
to a location or job site. The platform is preferably a
chassis-type structure being of a rigid material capable of
withstanding excessive weight and force. Additionally, the platform
may include hooks located at the front and rear bumper by which to
be transported.
[0015] The platform includes a fluid system having a control
system. The fluid system may include a fluid tank, a fluid heater,
a plurality of pumps, an air blower and the like. The control
system may include a PLC and a computer, which is used to
communicate and monitor variables, such as temperature and pressure
during the conduit expansion process. Additionally, the platform
may include other equipment such as a generator, pumps, blowers,
compressors, and the like, as well as storage areas for tools and
hardware. Preferably, the major components of the conduit expansion
system are enclosed in compartmentalized bodies or structures. Such
structures will be commonly recognized in appearance and functional
standards as known in the truck body industry.
[0016] The present invention, both as to its construction and its
method of operation, together with the additional objects and
advantages thereof, will best be understood from the following
description of exemplary embodiments when read in connection with
the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a schematic view of a fluid system for conduit
expansion according to the present invention;
[0018] FIG. 2 is a schematic view and flow diagram of a preferred
embodiment of a fluid system for conduit expansion according to the
present invention;
[0019] FIG. 3 is a schematic view and flow diagram of a further
preferred embodiment of a fluid system for conduit expansion
according to the present invention;
[0020] FIG. 4 is a top schematic view of a mobile fluid system for
conduit expansion according to the present invention; and
[0021] FIG. 5 is a side schematic view of a further preferred
embodiment of a mobile fluid system for conduit expansion according
to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0022] For purposes of the description hereinafter, the terms
"upper", "lower", "right", "left", "vertical", "horizontal", "top",
"bottom" "lateral" and "longitudinal" and derivatives thereof shall
relate to the invention as it is oriented in the drawing figures.
However, it is to be understood that the invention may assume
various alternative variations and step sequences, except where
expressly specified to the contrary. It is also to be understood
that the specific devices and processes illustrated in the attached
drawings, and described in the following specification, are simply
exemplary embodiments of the invention. Hence, specific dimensions
and other physical characteristics related to the embodiments
disclosed herein are not to be considered as limiting.
[0023] Other than in the operating examples or where otherwise
indicated, all numbers or expressions referring to quantities of
ingredients, reaction conditions, etc., used in the specification
and claims are to be understood as modified in all instances by the
term "about." Various numerical ranges are disclosed in this patent
application. Because these ranges are continuous, they include
every value between the minimum and maximum values. Unless
expressly indicated otherwise, the various numerical ranges
specified in this application are approximations.
[0024] The present invention is a fluid system 10 for use in
connection with a conduit expansion process and is illustrated in
various embodiments in FIGS. 1-5. Specifically, with reference to
FIG. 1, the fluid system 10 is typically used in connection with a
liner conduit 100 that is positioned within a host conduit 102 in a
conduit expansion system 12. In a preferred embodiment, this liner
conduit 100 is manufactured from a thermoplastic material, such as
polyvinyl chloride. However, it is envisioned that any material
having the appropriate expansion characteristics can be used, and
this fluid system 10 works equally effectively with any expandable
liner conduit 100 in a conduit expansion system 12.
[0025] Referring to FIG. 1, the fluid system 10 includes a fluid
processing system 14 for processing a fluid emanating from a fluid
source 16. The processed fluid is injected into the conduit
expansion system 12 (and typically the liner conduit 100) via a
fluid injection source 18, and after the fluid has been used
beneficially in the conduit expansion system 12, it is returned to
the fluid processing system 14 via a fluid recycle return 20. Next,
the fluid processing system 14 reprocesses the fluid for reuse in
the conduit expansion system 12.
[0026] It should be noted that the above-discussed systems, and the
specific arrangement of the components and subcomponents of these
systems, as discussed in detail hereinafter, represent only
exemplary embodiments. It is envisioned that the fluid may be both
injected through and recycled from fluid injection source 18, while
alternatively, the fluid may be injected through the fluid
injection source 18 and removed through the fluid recycle return
20. It is only necessary that the fluid is somehow inserted or
injected appropriately into the conduit expansion system 12 and, if
required, removed therefrom.
[0027] In one preferred and non-limiting embodiment, as shown in
FIG. 2, fluid, typically water, is injected into the conduit
expansion system 12 via the fluid injection source 18, as driven by
a circulation pump 22. After use in the conduit expansion system
12, the used or spent fluid is returned to the fluid processing
system 14 via the fluid recycle return 20. As used and discussed
hereinafter, an enormous benefit is recognized by the present
invention by using elevated temperature water, since hot water is
relatively incompressible and will not fluctuate in temperature or
pressure as rapidly as steam and/or air. In addition, since heated
water does not have as high of a BTU content as, for example,
steam, circulation and BTU replacement issues do not arise as in
prior art systems. Therefore, as set forth in detail hereinafter,
the fluid will be referred to as water or hot water. The fluid
processing system 14 may be either a low or high pressure
system.
[0028] In a preferred and non-limiting embodiment, the hot water is
of sufficient temperature to effect the expansion of the liner
conduit within the host conduit. Typically, hot water, having a
temperature of at least 125.degree. F., in some cases at least
150.degree. F., in other cases at least 175.degree. F., and in some
situations at least 200.degree. F. is used. The water is circulated
in the liner conduit 100 until all of the walls of the conduit 100
approach the temperature of the water.
[0029] After the water is returned to the fluid processing system
14 via the fluid recycle return 20, it is transferred into a fluid
heater 24. The fluid heater 24 re-elevates or heats up the water,
and the circulation pump 22 replaces the water in the conduit
expansion system 12 via the fluid injection source 18. Prior to
return of water through the fluid heater 24, a drain 26 may be used
to remove excess water. In addition, a bleed line 28 may be used to
bleed off water and/or reduce pressure in the fluid processing
system 14.
[0030] Hot water may also be added near the exit of the fluid
heater 24. Specifically, water may be drawn from a fluid vessel 30
and moved into the system 10 via an expansion pump 32. A bypass
line 34 may also draw from the fluid vessel 30, however the bypass
line 34, specifically the water in the bypass line 34, is not
processed through the expansion pump 32.
[0031] Water is transferred into the fluid vessel 30 via the fluid
source 16, and this fluid source 16 can be any number of water
sources, for example a fire hydrant or the like. In addition, the
fluid vessel 30 includes an overflow line 36 for use in conditions
where the water in the fluid vessel 30 is excessive in volume.
[0032] As shown in FIG. 2, any one or more of the components or
subcomponents of the fluid processing system 14 may be controlled
and/or monitored by a control mechanism 38. While in the fluid
processing system 14 illustrated in FIG. 2, the control mechanism
38 is shown to be in communication with the fluid heater 24. It is
envisioned that the control mechanism 38 can be in communication
with any of the components or subcomponents, whether individually
or collectively, in the fluid processing system 14, the fluid
source 16 and/or the conduit expansion system 12. This control
mechanism 38 provides computerized control of the measurement and
control devices, such as valves, check valves, meters, gauges and
the like. In addition, the control mechanism 38 collects
information for use in research and developing an improved and more
efficient fluid system 10.
[0033] In one preferred and non-limiting embodiment, the fluid
heater 24 is a single pass heating device with an output of about
60 gallons per minute. In the first pass, the fluid heater 24 can
elevate the temperature of the water to 180.degree. F., and,
thereafter, use a diesel-operated heating system to further elevate
the temperature from about 200.degree. F. to about 210.degree. F.
The fluid heater 24 is used to control the temperature of the water
in the range of 150.degree. F. to 210.degree. F. By using modified
connections on the fluid heater 24, the elevated or heated water
can be quickly heated and returned to the conduit expansion system
12 for further use.
[0034] From the inlet from the conduit expansion system 12 (fluid
recycle return 20), the hot water moves through a basket strainer
54 and into the circulation pump 22. The circulation pump 22
transfers the water through a check valve 46 and into the system
for further processing, for example back to the first heater unit
42. In addition, the outlet of the circulation pump 22 includes an
air release 56, as well as a measurement device 58. In this
embodiment, the measurement device 58 measures pressure. In
addition, this outlet line of the circulation pump 22 includes a
flow meter 60 for measuring and monitoring flow into the fluid
injection source 18.
[0035] Another preferred and non-limiting embodiment is illustrated
in FIG. 3. Beginning with the fluid recycle return 20 (or inlet
from conduit expansion system 12), the water flows through valve 40
and into the fluid heater 24. Since the system 10 can optionally
have more than one fluid heater 24, the water at this point will
flow into the first heater unit 42. The water may optionally be
transferred through valve 44 and into the fluid vessel 30. After
heating by the first heater unit 42, the hot water is moved through
a check valve 46 and further through valve 48. At this point, the
water may move through a pressure relief valve 50 and back into the
fluid vessel 30, or through the added pressure relief dump valve
52, and, again, to the fluid vessel 30.
[0036] Returning to the fluid injection source 18, the water may
move through valve 62, which acts as the main loop control valve,
and, thereafter, interacts with multiple measurement devices 58,
one measurement device 58 measuring temperature and the other
measurement device 58 measuring pressure. In addition, the water
moves through a flow meter 60 after encountering valve 62. Finally,
the hot water is transferred to the outlet to the conduit expansion
system 12 (fluid injection source 18).
[0037] With respect to the fluid vessel 30, the water in the fluid
vessel 30 is transferred through the expansion pump 32 and may be
returned back to the fluid vessel 30 via valve 64. Alternatively,
the water may move by measurement device 58, through check valve
46, further through flow meter 60 and through valve 66, where it is
injected into the outlet of the first heater unit 42. The water
then flows along the previously-discussed path of check valve 46
and valve 48. Optionally, the discharge of the expansion pump 32
can also flow to or connect to the discharge of the circulation
pump 22.
[0038] The fluid vessel 30 may be equipped with a sight glass 68 or
other level sensing or monitoring device for viewing or sensing the
level of water in the fluid vessel 30, and is used in conjunction
with the overflow line 36 for managing the volume of water in the
fluid vessel 30. In addition, the water enters the fluid vessel 30
from the fluid source 16. Specifically, the water moves through
check valve 46, through valve 70 and further through check valve 46
and into the fluid vessel 30.
[0039] When using a second heater unit (not shown), water moves
from the outlet of this second heater unit to the inlet from the
second heater unit and through valve 72, where it proceeds along
the same path from the circulation pump 22 as discussed in
connection with the previously-discussed first heater unit 42
outlet. Similarly, water can be returned to the second heater unit
through valve 74 and into the inlet of the second heater unit.
[0040] In this manner, the present invention provides a fluid
system 10, including one or more fluid heaters 24, for use in
connection with a conduit expansion system 12. This system provides
controlled movement of water through the fluid processing system 14
and into the conduit expansion system 12. This water is monitored
at various points throughout the system for pressure, temperature,
flow, etc. in order to allow for efficient control as well as
further system 10 monitoring. In addition, the fluid heater 24
provides this beneficial hot water to the conduit expansion system
12 in a controlled and inherently safer manner. In addition, the
use of hot water provides a more stable system and a more uniform
heat distribution in the liner conduit of the conduit expansion
system 12. Therefore, the fluid system 10 drastically increases the
safety, stability and uniformity of the material used in the
conduit expansion system 12.
EXAMPLE
[0041] The fluid processing system 14 is capable of providing a
variable flow rate of up to 350 gallons per minute up to a pressure
of 150 to 200 psi. In addition, the expansion pump 32 also provides
a variable flow rate through the piping system up to 70 gallons per
minute at a pressure of up to about 210 psi. The fluid heater 24 is
a 3.4 MBtu/hour enclosed-flame diesel-powered water heater.
[0042] The fluid vessel 30 may have varying capacities, for
example, 250 gallons. This fluid vessel 30 allows for inlets from
the surge of the hot water fill through valve 44, inlets from the
various pressure relief valves 50 and 52, as well as bypass inlet
through valve 64. In addition, the fluid vessel 30 uses a sight
glass 68, in conjunction with the overflow line 36 for controlling
the water in the fluid vessel 30.
[0043] The circulation pump 22 and expansion pump 32 should meet
the required specifications of the system, for example, the
circulation pump 22 may be a 25-30 HP motor with a maximum flow of
350 gallons per minute, while the expansion pump 32 may be a 5-10
HP motor with a maximum flow of 70 gallons per minute. Check valves
46 are used in connection with the other valves of the system to
prevent movement of water in the undesired direction. For example,
valve 70 can be a backflow preventer for ensuring that water does
not move back into the fluid source 16. All of the check valves 46,
valves and measurement devices 58 operate in a manner as known in
the art.
[0044] The fluid heater 24 should be capable of continuous
operation and located downstream of the circulation pump 22, such
that water supplied to the expansion loop is on the last pass
through the fluid heater 24. In addition, the water from the
expansion pump 32 should be injected into the fluid heater 24
inlet. The fluid heater 24 should be equipped with a suitable
temperature control for maintaining the water temperature under
operating conditions after the initial and desired temperature is
reached. Still further, the fluid heater 24 should be equipped with
any appropriate safety devices for preventing the occurrence of
unsafe or potentially damaging conditions. For example, the fluid
heater 24 may be supplied with a flame detection circuit, water
flow monitors, air flow monitors, spark arresters and temperature
switches as needed.
[0045] The control mechanism 38 may be in the form of a personal
computer, a laptop, a PDA, a printed circuit board, a computerized
mechanism, or other means for automatic control of the various
components and subcomponents of the fluid processing system 14. For
example, the measurement devices 58 may transmit information
remotely to the control mechanism 38 and receive control signals
from the control mechanism 38 in a wireless or hardwired format.
Various diagnostics can be monitored while the fluid processing
system 14 is in operation. Further, the control mechanism 38 for
the fluid processing system 14 may also be used in connection with
the conduit expansion system 12 and the fluid source 16.
[0046] The present invention is also directed to a mobile fluid
system 80 for use in connection with the conduit expansion system
12, and this mobile fluid system 80 is positioned on or within a
mobile unit 82 for use in connection with the conduit expansion
process and is illustrated in various embodiments in FIGS. 4 and 5.
The mobile unit 82 may be referred to as a mobile pipe expansion
vehicle, mobile conduit expansion unit or the like. The mobile unit
82 is designed to provide the capabilities required for expansion
of replacement structural water lines in systems such as
stand-alone structural systems used to rehabilitate pressure lines,
such as water lines, force mains and other industrial lines. As
discussed above, one such example of a process is a conduit
expansion process and system 12, which is typically used in
connection with the liner conduit 100 positioned within the host
conduit 102 in the conduit expansion system 12.
[0047] The mobile conduit expansion system 80 includes a mobile
unit 82, such as a truck, a vehicle, a trailer, and a skid, having
a platform 84 upon which to secure equipment, and which is capable
of transporting equipment for a conduit expansion process to a job
site. The platform 84 may include steps or a ramp, to facilitate
entry, exit and access to the equipment. As illustrated in FIGS. 4
and 5, the equipment on the platform 84 preferably includes the
fluid system 10 discussed above, including at least a fluid heater
24, a fluid vessel (not shown) and a control system 38, as well as
a generator 86 and storage area 88. While the present invention is
referred to in terms of a fluid system 10 and control system 38, it
is by no means limited to only a fluid system 10 and control system
38. The equipment on the platform 84 may relate to pressure
systems, heat systems, and the like, and will include equipment as
known by one skilled in the art, such as the generator 86, as well
as pumps and valves utilized in the system and process.
[0048] The platform 84 is preferably a chassis-type structure being
of rigid material capable of withstanding excessive weight and
force. The chassis is preferably rated to sustain loads imposed by
the vehicle at highway speeds. The chassis may also include hooks
90 located at the front and rear bumper by which to be transported.
Additional equipment that may be located on the chassis, including
those described hereinafter, may include the following:
heater/defroster, lights, electric wipers and washer, rearview
mirrors, vinyl seat trim, etc. Optionally, an engine hour meter may
be located in the cab to record truck engine operating hours.
[0049] Items may be located in various areas on the platform 84.
For example, while a pump may be placed on the platform 84, it may
also be located underneath the platform 84. Another example
includes placing a hose reel for an air compressor or even a hose
storage rack on the bottom or back of the platform 84. Thus, the
equipment may be arranged in such a manner so as to allow efficient
use of space on the platform 84, allow for placement of equipment
in a desired process arrangement, etc.
[0050] The mobile fluid system 80 positioned on the mobile unit 82
operates substantially as described above in connection with the
fluid system 10. Accordingly, the mobile fluid system includes the
fluid processing system 14 for processing a fluid emanating from a
fluid source 16. The fluid processing system 14 operates as
described above.
[0051] The mobile fluid system 80 also has adequate access to
components for servicing or removal of the equipment positioned on
the mobile unit 82 and/or platform 84. Isolation shutoff valves may
be installed at locations where large spillage may occur if a line
were to break or a valve where needed for safe operation of the
mobile unit 82. A back flow preventer may also be installed on the
inlet of the fill line to prevent water from back flowing, which is
particularly undesirable in the mobile fluid system 80. The water
system also includes a dump valve to remove water from the loop
during initial heat-up with an outlet connected to the water tank.
The system may also include a deaerator at the inlet to the
heater.
[0052] As with the fluid system 10 described above, the mobile
fluid system 80, and any one or more of the components or
subcomponents of the mobile fluid system 80 may be controlled
and/or monitored by the control system 38, also positioned on or
within the mobile vehicle 82. The control system 38 may include a
room having a PLC and a computer used to communicate and monitor
temperature and pressure of the conduit expansion system 12. While
in the fluid processing system 14, the control mechanism 38 is
shown to be in communication with the fluid heater 24, it is
envisioned that the control mechanism 38 can be in communication
with any of the components or subcomponents, whether individually
or collectively, in the fluid processing system 14, the fluid
source 16 and/or the conduit expansion system 12.
[0053] Additional process controls in the control system 38 may
include remote-mounted temperature and pressure sensors using
wireless data transmission. Additionally, the control room may
include on/off controls within the control room for the heater.
Other heater control box displays (LED) may include heater
performance features, such as hours of operation, fuel pressure,
de-icing water temperature, diagnostic features located at the
heater.
[0054] Overall, the components of the mobile fluid system 80 are
preferably enclosed in a compartmentalized type structure, with the
platform 84 body having an external appearance of one continuous
enclosure. The heater exhausts preferably exit toward the top side
of the mobile unit 82 to minimize damage to equipment parked to
either side. Shrouding may be utilized to cover in efforts to help
minimize noise. Additionally, the platform 84 may include storage
areas for tools, hardware and pipe storage compartments. Access
doors may be included to aid in maintenance as well as lockable
latches. Louvers may also be provided for adequate ventilation.
[0055] In this manner, the present invention also provides a mobile
fluid system 80, including the fluid processing system 14 and a
control system 38 for use in connection with a conduit expansion
system 12. This system 80 provides for the controlled movement of
fluid, preferably water, through the fluid processing system 14 and
into the conduit expansion system 12. The mobile fluid system 80
drastically increases the ease with which to transport equipment
used for, as well as perform, the conduit expansion process. It
also increases safety, stability and uniformity of the process.
EXAMPLE
[0056] The mobile fluid system 80 includes a Ford F-650 truck
chassis as the mobile unit 82, which includes a platform 84, and
has a 7.2 L diesel engine, automatic. Power steering and hydraulic
braking systems are provided. Axle ratings of the chassis may be
about 8,500 lbs on the front axle, about 17,500 lbs on the rear
axle and about 26,000 lbs total. The chassis batteries include two
550 CCA each for a total of 1100 CCA Group 31. The wheelbase may be
194" with a CA of 120". The fuel tank of the chassis may have a
capacity of about 50 gallons.
[0057] The fluid processing system 14 is capable of providing a
variable flow rate of up to 350 gallons per minute up to a pressure
of 150 psi. In addition, the expansion pump also provides a
variable flow rate through the piping system up to 70 gallons per
minute at a minimum pressure of 210 psi. The fluid heater 24 is a
3.4 MBtu/hour enclosed-flame diesel-powered water heater.
[0058] The fluid vessel may have varying capacities, for example,
250 gallons. This fluid vessel allows for inlets from the surge of
the hot water fill through a valve, inlets from the various
pressure relief valves, as well as a bypass inlet through a valve.
In addition, the fluid vessel uses a sight glass, in conjunction
with the overflow line for controlling the water in the fluid
vessel.
[0059] The circulation pump and expansion pump should meet the
required specifications of the system, for example, the circulation
pump may be a 25 HP motor with a maximum flow of 350 gallons per
minute, while the expansion pump may be a 5 HP motor with a maximum
flow of 70 gallons per minute. Check valves are used in connection
with the other valves of the system to prevent movement of water in
the undesired direction. For example, valves can be a backflow
preventer for ensuring that water does not move back into the fluid
source 16. All of the check valves, valves and measurement devices
operate in a manner as known in the art.
[0060] The fluid heater 24 should be capable of continuous
operation and located downstream of the circulation pump 22, such
that water supplied to the expansion loop is on the last pass
through the fluid heater 24. In addition, the water from the
expansion pump should be injected into the fluid heater 24 inlet.
The fluid heater 24 should be equipped with a suitable temperature
control for maintaining the water temperature under operating
conditions after the initial and desired temperature is reached.
Still further, the fluid heater 24 should be equipped with any
appropriate safety devices for preventing the occurrence of unsafe
or potentially damaging conditions.
[0061] The control system 38 may be in the form of a personal
computer, a laptop, a PDA, a printed circuit board, a computerized
mechanism, or other means for automatic control of the various
components and subcomponents of the fluid processing system 14. For
example, the measurement devices may transmit information remotely
to the control system 38 and receive control signals from the
control system 38 in a wireless format. Various diagnostics can be
monitored while the fluid processing system 14 is in operation.
Further, the control system 38 for the fluid processing system 14
may also be used in connection with the conduit expansion
system.
[0062] The present invention provides a fluid system 10 that
overcomes the deficiencies of the prior art by using hot water as
an injection material into a conduit expansion system 12, as
opposed to steam and/or compressed air. Therefore, the fluid system
10 of the present invention is safer, more stable and provides
greater uniformity than similar systems and materials in the prior
art. Further, all of the components and subcomponents of the fluid
system 10 can be monitored and controlled to further enhance the
beneficial characteristics of the present invention. In addition,
the present invention provides a mobile fluid system 80 that
overcomes the deficiencies of the prior art by being a mobile unit
82 that can be moved or transported easily to a job location.
Therefore, the mobile fluid system 80 of the present invention is
safer, more stable, provides greater uniformity than similar
systems and materials in the prior art, as well as easily
transportable. Further, all of the components and subcomponents of
the fluid system 10 can be monitored and controlled from the mobile
unit 82 to further enhance the beneficial characteristics of the
present invention.
[0063] This invention has been described with reference to the
preferred embodiments Obvious modifications and alterations will
occur to others upon reading and understanding the preceding
detailed description. It is intended that the invention be
construed as including all such modifications and alterations.
* * * * *