U.S. patent application number 15/998819 was filed with the patent office on 2019-02-21 for textile machines that produce take-up packages.
The applicant listed for this patent is Saurer Technologies GmbH & Co. KG. Invention is credited to Mark Dellen, Georg Heinen, Sergei Singer.
Application Number | 20190055673 15/998819 |
Document ID | / |
Family ID | 65234919 |
Filed Date | 2019-02-21 |
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United States Patent
Application |
20190055673 |
Kind Code |
A1 |
Dellen; Mark ; et
al. |
February 21, 2019 |
TEXTILE MACHINES THAT PRODUCE TAKE-UP PACKAGES
Abstract
A textile machine that produces take-up packages with control
valves 1, whereby the control valves 1 each have a valve body 2, a
piston 3 and a plunger 4, whereby the plunger 4 comprises a front
seal seat 5 and a rear seal seat 6 as well as seals 9, with which
outlets, such as a main line 14, a pilot line 19, a connection 16
and at least one vent 15 are alternately sealable in the valve body
2, and the piston 3 has a piston seal 8 that separates two air
circuits from each other. Contact surfaces 11 are designed in the
valve body, at which the corresponding surfaces 12 of the front and
rear seal seats 5, 6 of the plunger 4 can be brought into
abutment.
Inventors: |
Dellen; Mark; (Krefeld,
DE) ; Heinen; Georg; (Krefeld, DE) ; Singer;
Sergei; (Krefeld, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Saurer Technologies GmbH & Co. KG |
Remscheid |
|
DE |
|
|
Family ID: |
65234919 |
Appl. No.: |
15/998819 |
Filed: |
August 16, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65H 54/70 20130101;
B65H 54/707 20130101; F16K 11/044 20130101; B65H 63/036 20130101;
F16K 31/1223 20130101; B65H 2701/31 20130101; D01H 13/00 20130101;
D01H 13/16 20130101; D01H 9/08 20130101 |
International
Class: |
D01H 9/08 20060101
D01H009/08; D01H 13/16 20060101 D01H013/16; B65H 54/70 20060101
B65H054/70 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 16, 2017 |
DE |
10 2017 118 683.2 |
Claims
1. A textile machine that produces take-up packages with control
valves (1), whereby the control valves (1) each have a valve body
(2), a piston (3) and a plunger (4), whereby the plunger (4)
comprises a front seal seat (5) and a rear seal seat (6) as well as
seals (9), with which outlets, such as a main line (14), a pilot
line (19), a connection (16) and at least one vent (15) are
alternately sealable in the valve body (2), and the piston (3) has
a piston seal (8) that separates two air circuits from each other,
characterized in that contact surfaces (11) are designed in the
valve body (2), at which the corresponding surfaces (12) of the
front and rear seal seats (5, 6) of the plunger (4) can be brought
into abutment.
2. The textile machine that produces take-up packages according to
claim 1, characterized in that the surfaces (12) corresponding to
the seals (9) have a conical design.
3. The textile machine that produces take-up packages according to
claim 1, characterized in that the piston (3) and the plunger (4)
are designed in two pieces.
4. The textile machine that produces take-up packages according to
claim 1, characterized in that a supporting element (10) is
available that is positioned so that the piston (3) is secured to
the plunger (4) and the piston seal (8) can be affixed to the
piston (3).
5. The textile machine that produces take-up packages according to
claim 1, characterized in that a connection designed as a
bottleneck is integrated between the main line (14) and pilot line
(19) in the plunger (4).
6. The textile machine that produces take-up packages according to
claim 5, characterized in that the bottleneck in the plunger (4) is
designed with a separate fixed throttle (13).
7. The textile machine that produces take-up packages according to
claim 1, characterized in that the seals (9) are designed as
O-rings.
8. The textile machine that produces take-up packages according to
claim 1, characterized in that the supporting element (10) can be
attached to the plunger (4) without destruction and unattached.
9. The textile machine that produces take-up packages according to
claim 1, characterized in that the control valve (1) is designed as
an individual or multiple unit.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of German patent
application DE 102017118683.2, filed Aug. 16, 2017, herein
incorporated by reference.
FIELD OF THE INVENTION
[0002] The invention relates to a textile machine that produces
take-up packages.
BACKGROUND OF THE INVENTION
[0003] With textile machines that produce take-up packages, for
example yarn and cabling machines, it is standard for sensor
devices to be used that monitor the most varied operational or
process states. For example, pneumatic, electropneumatic or
electromagnetic sensor devices are known in this regard. Based on
the signals from the sensor devices, devices are controlled that,
for example, initiate a package lifting device, the clamping of a
yarn, a yarn cut or the stopping of a spindle.
[0004] The positioning of a so-called pilot valve between the
sensor device and the device to be controlled, which in turn is
designed, for example, mechanically as a push button valve or
pneumatic actuating valve, is also known.
[0005] During the yarn process for example, the presence of the
yarn is monitored by a mechanical element positioned by the yarn.
If there is a yarn break, the mechanical element falls around an
axis of rotation due to its own weight, and thus operates the
switch pin of a pilot valve. The pilot valve is connected to a
control valve, which controls a pneumatic actor, in this example
the package lifting device.
[0006] The control valves that have been previously used in textile
machines that produce take-up packages have a so-called membrane
sealing ball design. This means that a sealing ball is connected
with a membrane via a plunger. The membrane is located between a
front and a rear chamber. Air streams into the rear chamber via a
main line and, where applicable, a fixed throttle valve. This
deforms the membrane towards the front and the plunger closes the
front seal seat in the valve housing with the attached sealing
ball. This means that no air can flow into one of the pneumatic
cylinders connected to the front chamber, and the pneumatic
cylinder can travel to its operating position via a vent.
[0007] If there is a yarn break, for example, a main line
positioned at the rear chamber is opened and the pressure falls in
the rear chamber, because more air flows out than can flow in over
the fixed throttle. Then the membrane moves backward together with
the plunger, the front seal seat of the sealing ball opens, clears
the path for the main air to the pneumatic cylinder, and the
sealing ball moves against the sealed mounting, whereby the entry
to the ventilation hole is closed.
[0008] After the yarn break is corrected and the workstation is
restarted, the pilot line positioned at the rear chamber is closed
again and pressure builds up again behind the membrane. The control
valve moves back to the operating position already described
again.
[0009] The membrane with the attached plunger and the sealing ball
is, however, a complex component in terms of production technology,
for which it is difficult to adhere to the required tolerances.
This creates the risk that an undefined state of uncertainty occurs
during operation, resulting in the membrane fluttering. The sealing
ball then is not positioned in a defined way at the relevant seal
seat, and lasting leaks occur via the ventilation hole. In
addition, the sealing ball is periodically put under stress.
[0010] Furthermore, in the operational state the full operational
pressure is permanently exerted on the membrane from behind, which
risks plastic deformations occurring to this flexible and sensitive
component over a long period of time, which in turn can cause
premature malfunctioning of the control valve and consequent
downtime for the workstation or textile machine.
SUMMARY OF THE INVENTION
[0011] The invention comprises a textile machine that produces
take-up packages with control valves.
[0012] One aspect of the present invention therefore comprises a
textile machine that produces take-up packages with control valves,
whereby the control valves each have a valve body, a piston and a
plunger, whereby the plunger comprises a front seal seat and a rear
seal seat as well as seals, with which outlets, such as a main
line, a pilot line, a connection and at least one vent are
alternately sealable in the valve body, and the piston has a piston
seal that separates two air circuits from each other.
[0013] The textile machine that produces take-up packages is also
characterized in that there are contact surfaces in the valve body
at which the corresponding surfaces of the front and rear seal
seats of the plunger can be brought abutment.
[0014] In this way, the path of the plunger with respect to the
relevant seal is restricted in the sealed surface. The maximum
deformation of the seals can be specified in advance through the
defined deformation limitation of the seals and the seals cannot
slide too far into the sealing gap. This guarantees a long lifespan
for the seals.
[0015] Through designing the textile machine like this, the control
valves can be practically and economically produced. Through the
design of contact surfaces with corresponding surfaces, material
influences above all are not so significant and disruptive to
functionality, as is the case with the membrane sealing ball
design.
[0016] Moreover, this type of seal seat is sufficiently durable for
the expected number of switch cycles with a textile machine that
produces take-up packages.
[0017] Because the maximum piston path is designed as a
short-stroke piston with two conical seal seats, a compact
structure of the control valve is maintained, whereby the piston
path is advantageously designed between 0.8 mm and 5 mm.
[0018] Finally, the use of these kinds of control valves in a
textile machine that produces take-up packages can result in an
economical and compact textile machine being offered without having
to accept impacts on quality during the manufacture of take-up
packages due to errors in functioning of the control valve. For
example, if a take-up package was not taken up by the drive roller
following a yarn break, it remains on the drive roller and is
driven at a diameter that can lead to yarn damage. This type of
design does not lead to any increased maintenance costs or an
increased need for repairs either.
[0019] In a preferred embodiment of the invention, the surfaces
corresponding to the seals are designed in a conical shape.
[0020] With a conical seal seat the advantage is that the seal is
fixed in a nut and is only compressed or released without
frictional load occurring on the seal surface. For seals located
directly at a cylindrical plunger, the seal would be put under
frictional or shearing load when the plunger moved. With axial
seals, on the other hand, the seal could adhere to the sealing
surface because it cannot be gripped in a nut.
[0021] In a further preferred embodiment, the piston and the
plunger are designed in two pieces.
[0022] Such a design ensures a simpler mounting of the control
valve. The connection between the two parts is secure and can be
done using a thread. Alternatively, the two parts can also be
connected via press fit or with an adhesive bond. In principle, all
joining techniques are possible in the context of the invention
that allow for a stable connection of the piston with the
plunger.
[0023] In particular, a supporting element is present that is
positioned so that the piston is secured on the plunger and the
piston seal is affixable to the piston.
[0024] If the piston is manufactured without a nut, because the
supporting element affixes the piston seal, the mounting of the
piston seal is simplified. The piston seal is positioned at the
piston and affixed to it via the supporting element, while
previously assembly had to be done in a very painstaking manner in
order to ensure functionality. The attachment of the piston seal to
the piston can moreover be done without tools and the risk that the
seal surface of the piston will be damaged is eliminated. In
addition, the supporting element ensures a constant secure fit of
the piston seal on the piston including during use in the textile
machine.
[0025] At the same time, the supporting element secures the piston
on the plunger, so that during the entire lifetime a defined
positioning of the piston on the plunger and consequently the
error-free functioning of the control valve are ensured.
[0026] Production of the essential components with plastic
injection moulding is possible, as previously. This also applies to
the piston and plunger. Previously, in order to achieve a secure
sealing effect, reworking would have had to be done using
overtwisting for a piston with a nut for the piston seal, because
the mould separation of the tool is positioned exactly in the
sealed surface of the piston. The injection moulding tool for a
piston without a nut can be designed so that, in the area of the
sealed surface, there is no mould separation and a machining rework
is therefore no longer necessary. The extra effort and associated
extra costs are no longer necessary with such a design.
[0027] In one preferred embodiment, a connection designed as a
bottleneck is integrated into the plunger between the main line and
the pilot line.
[0028] With such an integrated bottleneck, which can be designed as
an axis bore hole in the plunger, the air can flow from the main
line to the rear chamber or pilot line.
[0029] Alternatively, the bottleneck can be integrated into the
plunger through a separate fixed throttle.
[0030] It is possible in the context of the invention to affix a
fixed throttle to the plunger. In addition, a bore hole can
preferably be present in the plunger into which a separate fixed
throttle is set.
[0031] In particular, the seals are designed as O-rings.
[0032] O-rings are economical and can be acquired as standard
products.
[0033] Preferably the supporting element can be attached to the
plunger without destruction and can be detached.
[0034] The supporting element can, for example, after the piston
that has the piston seal has been put on, with a plunger and a nut
that has been moulded into the plunger, be pushed into the nut from
the side like a lock washer and snaps into place there. This not
only makes the assembly of the piston seal simpler as already
described, but also makes disassembly easier. Replacing the piston
seal is thus possible without using tools, without the risk that
the sealed surface of the piston becomes damaged when removing the
piston seal.
[0035] More advantageously, the control valve is designed as a
single or multiple unit.
[0036] The control valve can be constructed in either an individual
design or a multiple design, for example a double design. Depending
on the area of application, the control valve can be designed
according to requirements in the context of the invention. In this
case, two positions or workstations on the textile machine are
controlled by one control valve that is designed in a double
design. A multiple or double design is essentially more economical
to produce.
[0037] Further features and advantages of the invention are evident
from the following description of preferred embodiment examples of
the invention, on the basis of the figures and drawings
illustrating details essential to the invention, and from the
claims. The individual features can be implemented individually or
in any desired combination in a preferred embodiment of the
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Preferred embodiment examples of the invention are explained
in more detail below on the basis of the enclosed drawings. The
drawings show:
[0039] FIG. 1 is a schematic representation of a control valve with
closed front valve seat;
[0040] FIG. 2 is a schematic representation of a control valve with
closed rear valve seat;
[0041] FIG. 3 is a schematic representation of an embodiment
example of a supporting element according to the invention;
[0042] FIG. 4 a schematic representation of a part of the plunger
with the piston and supporting element positioned next to it.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0043] In FIG. 1, as an example a schematic view of the structure
of a control valve 1 with closed front seal seat 5 is shown.
[0044] The control valve 1 comprises a valve body 2 as well as a
piston 3 and a plunger 4. Below the piston 3 a piston seal 8
separates the two air circuits or the front chamber 17 and the rear
chamber 18.
[0045] A supporting element 10 is in turn positioned below the
piston seal 8. Through the supporting element 10, not only is the
piston 3 secured on the plunger 4, but also the piston seal 8 is
affixed to the piston 3.
[0046] Moreover, valve body 2 (divided into three in this
embodiment example) has contact surfaces 11, at the corresponding
surfaces 12, that are designed at the front and rear seal seats 5,
6 of the plunger 4, that can be transported to the system.
[0047] Air flows through a continuous axis bore hole with a small
diameter via the main line 14 through the plunger 4 into the rear
chamber 18. The axis bore hole or the small diameter is designed in
such a way as regards flow technology that a throttle function is
enabled. The piston 3 pushes into the front position due to the
large rear effective area and seals the conical front seal seat 5
by means of a seal 9, designed in this embodiment example as an
O-ring.
[0048] In this example, the corresponding surfaces 12 of the front
seal seat 5 are transported to the system at the contact surfaces
11 in the valve body, so that the O-ring of the front seal seat 5
is subject to a defined maximum deformation and cannot be squeezed
into the seal seat.
[0049] This means that no air can flow into the connection 16, to
which, for example, a simple pneumatic cylinder is connected and
the pneumatic cylinder can travel into its operating position via a
vent 15.
[0050] FIG. 2 shows the control valve 1 with closed rear seal seat
6. In contrast to FIG. 1, in this embodiment example a fixed
throttle 13 is attached to the plunger 4, through which air streams
into the rear chamber 18.
[0051] In the case of a yarn break, for example, the control valve
1 should be switched. The pre-control line 19 is released, i.e.
opened, at the control valve 1 via a (not shown) pre-control valve.
The pressure in the rear chamber 18 reduces, because more air flows
out than can flow in via the fixed throttle 13 into the plunger 4,
which means that the piston 3 moves to the rear, the conical front
seal seat 5 opens, releases the path of the main air through the
front chamber 17 to the connection 16 to the pneumatic cylinder and
the piston 3 moves against the (also conical) rear seal seat 6,
causing the entry to the vent 15 to close.
[0052] In this example, the corresponding surfaces 12 of the rear
seal seat 6 are transported to the system at the contact surfaces
11 in the valve body 2, so that the O-ring of the rear seal seat 6
is subject to a defined maximum deformation and cannot be squeezed
into the seal seat.
[0053] After the yarn break has been remedied and the yarn position
restarted, the front control line 19 is closed again. As described
above, pressure builds up again in the rear chamber 18 and the
piston 3 moves to the front operating position once again as
described above.
[0054] FIG. 3 shows an example of a supporting element 10 according
to the invention. The supporting element 10 is designed as a clamp
here, that can be pushed into a corresponding nut 7 of the plunger
4. In this way, the piston seal 8 can be attached easily and
without a tool to the piston 3. In order to ensure that the
supporting element 10 can be clicked out of the nut 7 of the
plunger 4 again, replacement or renewal of the piston seal 8 is
possible. In addition, the piston 3 is secured to the plunger 4
through the supporting element 10.
[0055] FIG. 4 shows a schematic representation of a part of the
plunger 4 with the piston 3 positioned next to it. The piston seal
8 is positioned below the piston 3. The supporting element 10 is
latched onto a nut 7, that is present in the plunger 4, which
ensures on the one hand the proper positioning of the piston 3 at
the plunger 4, and on the other hand attaches the piston seal 8 to
the piston 3.
LIST OF DRAWING REFERENCES
[0056] 1 Control valve [0057] 2 Valve body [0058] 3 Piston [0059] 4
Plunger [0060] 5 Front seal seat [0061] 6 Rear seal seat [0062] 7
Nut [0063] 8 Piston seal [0064] 9 Seal [0065] 10 Supporting element
[0066] 11 Contact surface [0067] 12 Corresponding surface [0068] 13
Fixed throttle [0069] 14 Main line [0070] 15 Vent [0071] 16
Pneumatic cylinder connection [0072] 17 Front chamber [0073] 18
Rear chamber [0074] 19 Pilot line
[0075] It will therefore be readily understood by those persons
skilled in the art that the present invention is susceptible of
broad utility and application. Many embodiments and adaptations of
the present invention other than those herein described, as well as
many variations, modifications and equivalent arrangements, will be
apparent from or reasonably suggested by the present invention and
the foregoing description thereof, without departing from the
substance or scope of the present invention. Accordingly, while the
present invention has been described herein in detail in relation
to its preferred embodiment, it is to be understood that this
disclosure is only illustrative and exemplary of the present
invention and is made merely for purposes of providing a full and
enabling disclosure of the invention. The foregoing disclosure is
not intended or to be construed to limit the present invention or
otherwise to exclude any such other embodiments, adaptations,
variations, modifications and equivalent arrangements.
* * * * *