U.S. patent application number 12/733317 was filed with the patent office on 2010-09-30 for arrangement having a seismically reinforced component.
Invention is credited to Ehrenfried Von Waldow.
Application Number | 20100242380 12/733317 |
Document ID | / |
Family ID | 40219349 |
Filed Date | 2010-09-30 |
United States Patent
Application |
20100242380 |
Kind Code |
A1 |
Von Waldow; Ehrenfried |
September 30, 2010 |
ARRANGEMENT HAVING A SEISMICALLY REINFORCED COMPONENT
Abstract
The invention relates to an arrangement with an
earthquake-proof, pole-type or tower-type projecting component (1)
of an industrial plant. It preferably relates to an arrangement for
the protection of such a component (1) of a plant for generating,
distributing or transforming electricity. The invention starts from
an arrangement, in which the earthquake-proof component (1) in
question is anchored via a foundation in ground or base (4) or is
attached via a fastening element (3) to ground or base (4) or to
another component of the plant. For earthquake protection according
to the invention, only one vertically aligned screw-type spring (2)
is disposed between the foundation or the fastening element and the
earthquake-proof component (1). This is joined in a force-fitting
and/or form-fitting manner with the foundation or fastening element
(3) as well as with the axially lower end of earthquake-proof
component (1), whereby the screw-type pressure spring (2) is loaded
exclusively vertically and to bending, i.e., dynamically, in case
of an earthquake.
Inventors: |
Von Waldow; Ehrenfried;
(Wohltorf, DE) |
Correspondence
Address: |
KRIEGSMAN & KRIEGSMAN
30 TURNPIKE ROAD, SUITE 9
SOUTHBOROUGH
MA
01772
US
|
Family ID: |
40219349 |
Appl. No.: |
12/733317 |
Filed: |
August 12, 2008 |
PCT Filed: |
August 12, 2008 |
PCT NO: |
PCT/DE2008/050025 |
371 Date: |
February 23, 2010 |
Current U.S.
Class: |
52/167.4 |
Current CPC
Class: |
F16F 15/067 20130101;
H02B 1/54 20130101 |
Class at
Publication: |
52/167.4 |
International
Class: |
E04B 1/98 20060101
E04B001/98; E04H 9/02 20060101 E04H009/02 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 23, 2007 |
DE |
10 2007 040 255.6 |
Claims
1. An arrangement with an earthquake-proof, pole-type or tower-type
vertically projecting component of an industrial plant, in which
the component in question is anchored via a foundation in ground or
base or is attached via a fastening element to ground or base or to
another component of the plant, is hereby characterized in that a
vertically aligned screw-type pressure spring is disposed between
the foundation or fastening element and earthquake-proof component,
which is joined in a force-fitting and/or form-fitting manner with
the foundation or fastening element as well as with the axially
lower end of earthquake-proof component, whereby screw-type
pressure spring which is loaded statically vertically by
earthquake-proof component is stressed exclusively vertically and
to bending in the case of an earthquake.
2. The arrangement according to claim 1, further characterized in
that the cross-sectional area of the screw-type pressure spring
approximately corresponds to the cross-sectional area of the
pole-type or tower-type component.
3. The arrangement according to claim 1, further characterized in
that earthquake-proof component involves a component of a plant for
power generation, in particular for generating electricity or a
component of a plant for distributing or transforming
electricity.
4. The arrangement according to claim 3, further characterized in
that component involves a current transformer with a vertically
projecting glass, ceramic, or porcelain body, and screw-type
pressure spring is disposed underneath glass, ceramic, or porcelain
body of current transformer and is attached by means of a plate
preferably screwed onto ground or base.
5. The arrangement according to claim 3, further characterized in
that component involves the pole of a power line.
6. The arrangement according to claim 1, further characterized in
that one or more dampers are additionally disposed underneath
earthquake-proof component, parallel to screw-type pressure
spring.
7. The arrangement according to claim 1, further characterized in
that a shrink tubing is disposed around screw-type pressure spring
in order to damp it.
8. The arrangement according to claim 1, further characterized in
that screw-type pressure spring is set up in a container filled
with a viscous mass and formed as part of fastening element.
9. The arrangement according to claim 8, further characterized in
that the viscous mass involves bitumen or silicone oil.
10. The arrangement according to claim 1, further characterized in
that the entire screw-type pressure spring or at least one of its
axial ends is embedded in an elastic-plastic mass.
11. The arrangement according to claim 10, further characterized in
that the elastic-plastic mass involves a foamed or molded
elastomer.
Description
[0001] The invention relates to an arrangement with an
earthquake-proof pole-type or tower-type projecting component. It
refers to the earthquake protection of such a component, which
projects vertically as part of an industrial plant. Without being
limited thereto, the invention preferably involves an arrangement
for the protection of a component of a plant for generating or
distributing electricity or for transforming it.
[0002] In earthquake-endangered regions of the earth, technical
solutions for protecting buildings, structures and industrial
plants from the effects of an earthquake are increasing in
importance. Thus, a plurality of technical solutions have already
been developed, in particular, for protecting buildings and the
persons living and/or working therein. These types of solutions are
frequently very complex and therefore expensive. For the protection
of human life, a correspondingly high expenditure is, of course,
surely justified in each case.
[0003] Over and above this, however, solutions also need to be
found for the protection of infrastructure from a disruption due to
the effects of an earthquake. It is right after a severe earthquake
that the availability of a largely intact infrastructure and of
supply equipment becomes particularly important. This is true
especially for supplying electricity. It is therefore also true
that solutions must be found for protecting the plants involved,
solutions that are effective, but are significantly more
cost-effective than the complex measures for protecting human life.
In such cases, it must be taken into consideration that plants for
generating electricity, distributing electricity, or transforming
electricity frequently comprise a plurality of components which
project vertically in a pole-type or tower-type manner, such as,
for example, the poles of a high-voltage line.
[0004] A solution for a high-voltage plant has become known, for
example, by JP 05 101 730 A for the earthquake protection of such a
pole-type or tower-type projecting component. According to this
publication, in the construction of the respective pole-type
component, a damping unit is incorporated, in which an expansion
bellows is disposed in a tube-shaped or hollow cylindrical segment
and an annular element is disposed around this bellows, the annular
element composed of alternating horizontally disposed springs and
damping elements. In this way, due to their horizontal arrangement,
the springs are vertically statically loaded by the
earthquake-proof component projecting over them, and in an
earthquake, as is known from other solutions of the prior art, are
stressed horizontally and vertically.
[0005] A solution is known from JP 06 245 336 A in which the
insulator body of a pole-type projecting element of a high-voltage
plant, this insulator being made of glass, ceramics or porcelain,
is connected with a mass that moves in a type of pendulum manner in
a viscous damping medium. The entire arrangement is stood up on a
support, whereby the earthquake-proof component is connected to the
vertical element of the support via a horizontally disposed annular
spring element. Both of the previously described solutions already
have a relatively simple construction based on the fact that they
are of a passive type.
[0006] The object of the invention is to provide an alternative
solution for the earthquake protection of pole-type or tower-type
vertically projecting components, which, in addition, preferably
has an even simpler construction.
[0007] The invention is solved by an arrangement with the features
of the principal claim. Advantageous embodiments and enhancements
of the invention are given by the subclaims.
[0008] The solution according to the invention for an
earthquake-proof, pole-type or tower-type vertically projecting
component of an industrial plant starts out from an arrangement, in
which the earthquake-proof component in question is anchored via a
foundation in the base or ground or is attached via a fastening
element to the base or ground or to another component of the
plant.
[0009] According to the invention, in this case, only one
vertically aligned screw-type spring is disposed between the
above-named foundation or the fastening element and the
earthquake-proof component. This is joined in a force-fitting or
form-fitting manner with the foundation or the fastening element as
well as with the axially lower end of the earthquake-proof
component. In distinction from the solutions of the previously
known prior art, in this novel solution for earthquake protection,
with only a vertically disposed screw-type pressure spring, the
spring is dynamically loaded exclusively vertically and to bending.
On the one hand, it is statically loaded vertically by the
gravitational force of the earthquake-proof component that is
introduced, and, on the other hand, it is stressed dynamically,
thus in the case of an earthquake, exclusively vertically and to
bending. In laboratory experiments, it has been shown surprisingly
that an effective solution for the earthquake protection of
pole-type or tower-type projecting components is provided by this
very simple arrangement as a part of a corresponding
arrangement.
[0010] Here, the arrangement according to the invention basically
involves, or in a number of cases of application, exclusively
involves an appropriately dimensioned, vertically disposed
screw-type pressure spring. According to one possible embodiment of
the invention, the earthquake-proof component involves a component
of a plant for generating, distributing, or transforming
electricity. A case of application that is particularly relevant in
practice is provided by an arrangement, in which the
earthquake-proof component involves a current transformer with a
vertically projecting insulator, i.e., a glass, ceramic or
porcelain body, whereby the screw-type pressure spring is disposed
underneath the insulator in question on the current transformer and
is attached to the bottom of the stand for the current transformer.
An appropriately designed arrangement, however, can also be used
for the earthquake protection of the pole of a power line.
[0011] As already stated, an effective earthquake protection,
corresponding to the basic concept of the invention, is already
provided by the one screw-type pressure spring vertically disposed
underneath the earthquake-proof component. However, this does not
exclude the fact that, depending on the application, additional
measures may further increase or improve the effectiveness of the
earthquake protection given by the screw-type pressure spring, but
will do so while basically maintaining a simple construction with
only one screw-type pressure spring. For this purpose, according to
one possible enhancement of the invention, one or more dampers are
disposed underneath the earthquake-proof component, parallel to the
screw-type pressure spring. In this case, viscoelastic dampers,
elastic-plastic dampers or even hydraulic dampers may be
involved.
[0012] According to another embodiment of the invention, for
damping the screw-type pressure spring, a type of shrink tubing
made of an elastic material is disposed around this spring. Another
possible embodiment is also given by the fact that the screw-type
pressure spring is set up in a tank filled with a viscous damping
mass. For example, silicone oil or bitumen are considered as a
viscous (preferably highly viscous), i.e., freely flowing mass for
filling a tank surrounding the screw-type pressure spring.
[0013] Further, an effective protection, however, can also be
achieved in the case of a comparatively simple construction by
embedding the screw-type pressure spring or at least one of its
axial ends, preferably the axial lower end, in an elastic-plastic
mass. Foamed or molded elastomers can be used with advantage for
this purpose.
[0014] The invention will be explained once more in more detail
below on the basis of an embodiment example. For this purpose, the
arrangement of a component 1 provided with earthquake protection
according to the invention is shown in FIG. 1, by way of example.
This involves a current transformer 5, 6, 7. The current
transformer 5, 6, 7 comprises: an upper container 5, in which is
placed the actual transformer; an insulator, for example, in the
form of a ceramic body 6; and a lower, secondary terminal box 7 by
means of which screw-type pressure spring 2 is attached to current
transformer 5, 6, 7. It can be seen from the FIGURE that, in
particular, the vertically projecting brittle ceramic body 6 of
current transformer 5, 6, 7 is in danger of breaking up in the case
of a dynamic stress due to vibrations that occur as a consequence
of an earthquake. Therefore, corresponding to the basic concept of
the invention, a screw-type pressure spring 2 is disposed in
vertical alignment underneath ceramic body 6 of earthquake-proof
component 1, in axial alignment with the vertically projecting
ceramic body 6. Screw-type pressure spring 2 is connected to
earthquake-proof component 1 at secondary terminal box 7 of current
transformer 5, 6, 7 and is fastened at the other axial end via
plate 3, with the screw connections belonging to it, to ground or
base 4, for example, a concrete surface. The arrangement shown
serves for effective earthquake protection, exclusively employing a
screw-type pressure spring 2, the outer diameter of which
corresponds in order of magnitude to the outer diameter of the
pole-shaped, earthquake-proof component 1, as can be seen from the
drawing.
[0015] In distinction from the example shown in FIG. 1, plate 3,
with the screw connections indicated by the vertical lines to the
left and right of screw-type pressure spring 2, can also be
configured as a base plate of a pot-shaped fastening element,
whereby the corresponding base plate projects laterally to form the
pot-shaped part of the fastening element in question. In this case,
the lower windings of screw-type pressure spring 2 would be
embedded in a plastic-elastic mass that damps screw-type pressure
spring 2 and would be taken up by the pot-shaped part of the
fastening element, and attached to ground or base 4 via the base
surface of the pot-shaped element with screw connections belonging
to it.
LIST OF REFERENCE NUMBERS USED
[0016] 1 (Earthquake-proof) component [0017] 2 Screw-type pressure
spring [0018] 3 Fastening element, for example, plate with screw
connections [0019] 4 Ground or base [0020] 5 Current transformer
(box containing transformer) [0021] 6 Current transformer
(insulator, for example, ceramic body) [0022] 7 Current transformer
(box or secondary terminal box)
* * * * *