CN114233931A - Energy consumption support and gas-insulated metal-enclosed switchgear system - Google Patents
Energy consumption support and gas-insulated metal-enclosed switchgear system Download PDFInfo
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- CN114233931A CN114233931A CN202111351978.9A CN202111351978A CN114233931A CN 114233931 A CN114233931 A CN 114233931A CN 202111351978 A CN202111351978 A CN 202111351978A CN 114233931 A CN114233931 A CN 114233931A
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- energy dissipation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/035—Noise absorbers in the form of specially adapted hangers or supports
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an energy dissipation support and a gas insulated metal enclosed switchgear system, wherein the energy dissipation support comprises a support part and an energy dissipation part; the energy dissipation part is characterized by comprising a spherical rolling device and a vertical energy dissipation device; the supporting part is positioned above the spherical rolling device, and the vertical energy dissipation device is positioned below the spherical rolling device; the spherical rolling device comprises a base body with limiting sashes and a bearing sphere limited in each sash; the vertical energy dissipation device comprises a top plate, a bottom plate and a negative-rigidity negative-Poisson ratio energy dissipation element positioned between the top plate and the bottom plate. The energy-consuming support can release the horizontal dynamic degree of freedom under the action of temperature and earthquake, avoids the secondary internal force in equipment caused by fixed constraint, can ensure the vertical bearing capacity of the support under small displacement, realizes the vertical negative rigidity and the negative Poisson ratio characteristic under the action of earthquake, efficiently dissipates partial earthquake dynamic energy, and ensures the structural safety of GIS equipment.
Description
Technical Field
The invention relates to the field of design and manufacture of gas insulated metal enclosed switchgear (GIS), in particular to an energy consumption support suitable for a gas insulated metal enclosed switchgear (GIS) system.
Background
With the rapid development of urbanization, the power system is used as the core foundation of the urbanization process and is continuously faced with technical innovation. Gas insulated metal enclosed switchgear (GIS) combines high voltage electrical appliances enclosed in a metal housing with inert gas, and is a very efficient high voltage switchgear. Compared with the traditional power transformation equipment, the GIS equipment has the advantages of land conservation, small size, convenience in installation, low failure rate and the like, so that the GIS equipment is widely applied to urban power systems in recent years. However, the GIS closed pipeline system has a complex working environment, is affected by temperature changes all the year round in service, and particularly has large seasonal temperature difference and day-night temperature difference in western regions. The conventional support mode of GIS equipment sets up the connecting plate on the ring flange, adopts bolted connection with the support frame with the connecting plate. Under the action of temperature, the pipeline expands and contracts, and the bolt body bears shearing force and bending moment. When the shearing force and the bending moment are large, the bolts are damaged, the supporting function of the pipeline fails, the stress and the deformation of the bus pipe or the interval may exceed the allowable range, the safety of the whole structure of the GIS equipment is threatened, and even gas leakage and safety accidents may occur. Therefore, the fixed support connection mode of the GIS equipment has defects when the temperature effect is obvious.
In view of the important position of the power system in the lifeline engineering, the GIS equipment needs to ensure good anti-seismic performance during earthquake, and ensure the safe operation of the power system equipment. Besides improving the anti-seismic performance of the GIS equipment, the improvement of the support form of the support and the improvement of the energy consumption capability of the support also have important functions. However, the existing anti-seismic research is still mainly focused on the GIS equipment, and related research results of energy-consuming supports suitable for the GIS equipment are lacked. At present, in order to improve the bearing capacity, the conventional linear vibration isolation system increases the structural rigidity, thereby weakening the vibration isolation effect.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy consumption support which releases the horizontal displacement of the support and avoids the mechanical defect of a fixed support under the action of temperature or horizontal earthquake and is suitable for a gas insulated metal closed switch equipment system.
In order to achieve the purpose, the invention adopts the technical scheme that:
an energy consumption support comprises a support part and an energy consumption part; the energy dissipation part is characterized by comprising a spherical rolling device and a vertical energy dissipation device; the supporting part is positioned above the spherical rolling device, and the vertical energy dissipation device is positioned below the spherical rolling device; the spherical rolling device comprises a base body with limiting sashes and a bearing sphere limited in each sash; the vertical energy dissipation device comprises a top plate, a bottom plate and a negative-rigidity negative-Poisson ratio energy dissipation element positioned between the top plate and the bottom plate.
The negative-rigidity negative-Poisson ratio energy dissipation element is of a three-dimensional structure consisting of beam system units; the beam system unit is of a symmetrical structure consisting of an upper arc beam, two oblique beams and a lower arc beam, and the two oblique beams are respectively arranged at two ends of the upper arc beam and the lower arc beam; the upper arc-shaped beam is formed by connecting a middle convex curved beam and concave curved beams positioned at two sides of the middle convex curved beam; the lower arc beam is a convex short beam.
The negative-rigidity negative-Poisson ratio energy dissipation element is a circle or a polygon enclosed by the beam system units.
The negative-rigidity negative-Poisson ratio energy dissipation element is a quadrangle formed by enclosing the beam system units, and each side of the negative-rigidity negative-Poisson ratio energy dissipation element is of a multi-row and multi-column structure formed by distributing the beam system units in the horizontal direction and the vertical direction simultaneously.
The supporting part comprises an arc-shaped plate, an arc-shaped pipe bracket and a pipe bracket support; the arc-shaped plate and the arc-shaped pipe bracket have diameters matched with the diameter of a flange plate of a bus tube of the gas insulated metal closed switch equipment system; an arc-shaped supporting plate and a stiffening plate vertical to the supporting plate are arranged in the pipe bracket support; the arc pipe support is positioned on the arc support plate; the arc plate is positioned on the arc tube.
The central angle range corresponding to the arc length of the inner diameter of the arc-shaped plate is 120-180 degrees.
The arc-shaped plate is a polytetrafluoroethylene plate.
The base body consists of a continuous vertical limiting plate, a segmented vertical limiting plate and a bottom supporting plate; the bearing ball body is positioned on the bottom supporting plate and limited in a limiting lattice formed by the continuous vertical limiting plate and the segmented vertical limiting plate.
And a horizontal movement allowable distance of 2-10 cm is kept between the bearing sphere and the limiting sash.
And the continuous vertical limiting plate, the segmented vertical limiting plate and the bottom supporting plate are connected by welding.
The invention provides an energy consumption support form suitable for a gas insulated metal enclosed switchgear (GIS) system based on the disadvantages of a conventional support form of the GIS in the aspects of temperature effect and anti-seismic performance, and the invention adopts a spherical rolling device to release temperature and the translational freedom degree in the horizontal direction under the action of earthquake to avoid the secondary internal force in the GIS caused by fixed constraint; the vertical energy dissipation device can guarantee the vertical bearing capacity of the device under small displacement, the transition of the convex arc beam is utilized to realize vertical negative rigidity under the action of rare earthquakes, partial earthquake energy is efficiently dissipated, the negative Poisson ratio effect is generated after the negative rigidity, the occurrence of dense strain can be delayed, and the structural stress of the arc beam after transition is slowly increased to guarantee the structural safety of GIS equipment.
Compared with the prior art, the invention has the following beneficial effects:
(1) the energy consumption support can release the translational freedom degrees in the horizontal direction under the action of temperature and earthquake, avoids the secondary internal force in equipment caused by fixed constraint, and ensures the design safety margin of GIS equipment.
(2) The energy dissipation support disclosed by the invention realizes vertical negative rigidity by utilizing the transition of the convex arc beam, dissipates part of earthquake motion energy, and has better vibration reduction and isolation effect than that of a conventional linear vibration reduction and isolation support.
(3) The energy-consuming support beam system unit provided by the invention has the advantages that the beam system unit is integrally contracted due to instability of the oblique beam, a negative Poisson ratio effect is generated, the stress of the arc-shaped beam after transition is slowly increased, and the safety of an equipment structure is protected.
(4) The energy consumption support can realize multi-stage negative rigidity by utilizing the multi-layer beam system unit, and the application range of the energy consumption support is expanded and enriched.
(5) The energy dissipation support is mainly made of steel, so that the bearing capacity under the static force action is ensured while the energy is dissipated efficiently.
(6) The PTFE arc-shaped plate is arranged between the flange plate and the arc-shaped pipe support, so that the friction force is small, the horizontal allowable displacement can be additionally provided under the action of the spherical rolling device, and the safety of GIS equipment can be improved under the action of rare earthquakes.
(7) The energy-consuming support disclosed by the invention is clear in structure, can be manufactured into finished products and has the advantage of industrial popularization.
Drawings
FIG. 1 is a schematic view of an energy dissipating mount of the present invention;
FIG. 2 is a schematic view of the relationship of the PTFE arcuate plate, arcuate tube carrier and flange of the present invention;
FIG. 3 is a schematic view of the pipe bracket support assembly of the present invention;
FIG. 4 is an isometric view of the spherical rolling device of the present invention;
FIG. 5 is a top view of the spherical rolling device of the present invention;
FIG. 6 is an isometric view of a vertical energy consuming device of the present invention;
FIG. 7 is a front view of a dissipative element of the invention;
FIG. 8 is a schematic view of the beam system unit of the present invention;
fig. 9 is a schematic diagram of the stiffness variation curve of the beam system unit of the invention.
In the figure: 1. a bus tube flange plate; 2. an arc-shaped plate; 3. an arc pipe bracket; 4. supporting a pipe bracket; 5. a spherical rolling device; 6. a vertical energy dissipation device; 7. a landing support frame; 8. the pipe bracket supports the arc-shaped supporting plate; 9. the pipe bracket support end part is inclined to the stiffening plate; 10. the pipe bracket supports the middle vertical stiffening plate; 11. the pipe bracket supports the bottom plate; 12. rolling the bearing ball body; 13. the spherical rolling device continuously vertically limits the plate; 14. the spherical rolling device is provided with vertical limiting plates in sections; 15. a spherical rolling device bottom plate; 16. a vertical energy consuming device top plate; 17. a vertical energy consuming device floor; 18. negative stiffness negative poisson's ratio dissipative element; 19. an upper arc beam; 20. an oblique beam; 21. a lower arcuate beam.
Detailed Description
The following description of the embodiments of the present invention with reference to the drawings is intended to cover only some, but not all, of the embodiments of the present invention. Other embodiments formed by persons skilled in the art without any inventive work based on the description of the present invention belong to the protection scope of the present invention.
As shown in fig. 1, the present invention provides an energy consuming support, which is applicable to a gas insulated metal enclosed switchgear (GIS) system. The energy dissipation support comprises a support part and an energy dissipation part. The energy dissipation part comprises a spherical rolling device and a vertical energy dissipation device. The supporting part is positioned above the spherical rolling device, and the vertical energy dissipation device is positioned below the spherical rolling device.
The spherical rolling device comprises a base body with limiting sashes and a bearing sphere limited in each sash; the vertical energy dissipation device comprises a top plate, a bottom plate and a negative-rigidity negative-Poisson ratio energy dissipation element positioned between the top plate and the bottom plate.
The supporting part, the spherical rolling device 5 and the vertical energy dissipation device 6 which are arranged from top to bottom can be connected by welding.
The vertical energy dissipation device 6 is arranged on the floor support frame 7 and can be welded or connected through bolts.
The supporting part comprises an arc-shaped plate 2, an arc-shaped pipe support 3 and a pipe support 4, wherein the arc-shaped plate 2 is directly contacted with the supporting flange plate 1. The lower part of the arc pipe bracket 3 is connected with the pipe bracket support 4 to form a whole body, and the whole body is used for supporting the weight and other vertical loads of the upper GIS equipment. Wherein the arc plate 2 can be a PTFE (polytetrafluoroethylene) plate.
Figure 2 shows the relationship of the present invention arcuate plate 2, arcuate tube carrier 3 and supporting flange 1. The arc plate 2 is arranged between the support flange plate 1 and the arc pipe support 3, and adopts a direct placing scheme without other connecting modes. The inner diameter of the arc-shaped plate 2 is the same as the outer diameter of the flange plate 1, and the tight attaching state is kept. The arc length of the inner diameter of the arc plate 2 corresponds to the central angle ranging from 120 degrees to 180 degrees, and the lateral supporting force can be provided while the effective vertical supporting force is provided.
The arc pipe bracket 3 is made of carbon steel, the inner diameter of the arc pipe bracket is the same as the outer diameter of the arc plate 2, the arc length and the width of the inner diameter are consistent with those of the arc plate 2, and the arc pipe bracket and the arc plate are ensured to be tightly attached. The thickness of the arc-shaped pipe bracket 3 is calculated according to the designed lateral supporting force.
Fig. 3 is a schematic structural view of the pipe bracket support 4. The pipe bracket support 4 is made of carbon steel, consists of an arc-shaped supporting plate 8, an end part oblique stiffening plate 9, a plurality of stiffening plates 10 vertical to the supporting plate and a bottom plate 11, and has bilateral symmetry. The top surfaces of the arc-shaped supporting plate 8, the end part oblique stiffening plate 9 and the plurality of vertical stiffening plates 10 of the pipe support 4 are matched with the shape of the arc-shaped pipe support 3 for welding and fixing. The number of the arc-shaped supporting brackets 8 can be 2-3, the two sides are arranged or the two sides and the middle part are respectively provided with 1, and the inner diameter of the arc-shaped supporting brackets is the same as the outer diameter of the arc-shaped pipe bracket 3. The oblique stiffening plates 9 at the end parts of the two sides are respectively provided with 1 on each side and obliquely crossed with the arc-shaped supporting plate 8. The number of the middle vertical stiffening plates 10 can be 2-5, and the middle vertical stiffening plates are orthogonal to the arc-shaped supporting plate 8. The size and thickness of the bottom plate 11 are required to meet the bearing requirements and match the sizes of the upper and lower components.
The arc-shaped supporting plate 8, the end part oblique stiffening plate 9 and the middle part vertical stiffening plate 10 are connected by welding, and the bottom surface and the bottom plate 11 are also fixed by welding.
Fig. 4 to 5 are schematic structural views of the spherical rolling device 5. The spherical rolling device 5 consists of a rolling bearing sphere 12 and a base body, wherein the base body consists of a continuous vertical limiting plate 13, a segmented vertical limiting plate 14 and a bottom supporting plate 15. The spherical rolling device 5 is arranged on the lower part of the pipe bracket support 4 and the upper part of the vertical energy dissipation device 6. The rolling bearing ball body 12 is made of alloy steel, vertical bearing capacity is provided by positive contact with the bottom plate 11 of the pipe support 4, 4-12 rolling bearing balls are placed on the bottom supporting plate 15, and the diameter size of the rolling bearing ball body is obtained according to the bearing capacity and the number of the rolling bearing ball bodies. The continuous vertical limiting plate 13, the segmented vertical limiting plate 14 and the bottom supporting plate 15 are made of carbon steel, and the continuous vertical limiting plate 13, the segmented vertical limiting plate 14 and the bottom supporting plate 15 are connected in a welding mode. Firstly, welding continuous vertical limiting plates 13 on a bottom supporting plate 15, and then welding segmented vertical limiting plates 14. 3-5 lines of continuous vertical limiting plates 13 and segmented vertical limiting plates 14 can be arranged. Each rolling supporting sphere 12 is separated from each sectional vertical limiting plate 14 by a continuous vertical limiting plate 13, and a horizontal movement allowable distance of 2-10 cm is kept between each rolling supporting sphere 12 and each continuous vertical limiting plate 13 and each sectional vertical limiting plate 14.
Fig. 6 is a schematic structural diagram of the vertical energy consumption device 6. The vertical energy dissipation device 6 is composed of a top plate 16, a bottom plate 17 and a negative-stiffness negative-poisson-ratio energy dissipation element 18, and the materials are all carbon steel. The vertical energy dissipation device 6 is placed on the floor support frame 7. The dimensions and thicknesses of the top plate 16 and the bottom plate 17 are calculated, and the net spacing between them is the height of the negative stiffness negative poisson's ratio dissipative element 18. Typically, the length and width of the plate 16 and base plate 17 are at least 4 cm greater than the corresponding length and width of the negative stiffness negative poisson's ratio dissipative element 18. Welding is adopted between the negative-rigidity negative-Poisson ratio energy dissipation elements 18 and between the negative-rigidity negative-Poisson ratio energy dissipation elements and the bottom plate 17 of the top plate 16.
Fig. 7 is a schematic structural diagram of the negative stiffness negative poisson's ratio dissipative element 18. The negative-stiffness negative-poisson-ratio energy dissipation element 18 is composed of a plurality of repetitive beam system units, forms a three-dimensional structure and has symmetry. The size and the arrangement number of the beam system units are obtained by simulation according to the vibration load value and the energy absorption requirement, and finally a 4 multiplied by 3 space structure can be formed.
Fig. 8 is a schematic structural view of the beam system unit. The beam system unit is composed of an upper arc beam 19, an oblique beam 20 and a lower arc beam 21, and is symmetrical left and right. The upper arc beam 19 is formed by connecting a concave curved beam and a convex curved beam, the curve form can adopt an arc line, the concave arc line is tangent to the convex arc line, the radius is consistent, and good curve shape transition is formed. The lower arched beam 21 is a convex short beam, and the radius of the upper arched beam 19 is the same, so that the lower arched beam can be conveniently connected with the lower beam system unit. The inclined beams 20 on two sides can adopt a line type with various slopes, and the horizontal included angle of the inclined beams 20θ40 to 70 degrees may be desirable. The beam system unit has the characteristics of negative rigidity and negative Poisson ratio at different compression stages, the beam system unit has the characteristic of negative rigidity at first along with the loading process, the energy dissipation capacity is strong, the beam system unit gradually shows the characteristic of negative Poisson ratio after energy consumption, the compression stroke of the beam system unit is prolonged, the generation of dense structure is delayed, the stress of the arc-shaped beam after transition is slowly increased, and the safety of the equipment structure is protected. The beam system unit design is easy to assemble, and multi-stage negative rigidity characteristics can be generated by utilizing interlayer transformation in the height direction.
Fig. 9 shows a stiffness variation curve of the beam system unit. The beam system unit can be divided into three stages of deformation characteristics in the compression process, and the load-displacement curve shows the trend of rigidity change. Firstly, under the action of small displacement, the beam system unit presents positive rigidity, namely the deformation characteristic of the stage I, and mainly shows the compression deformation of the upper arc beam 19, and the beam system unit can bear the vertical load of the upper part; the large-displacement lower beam system unit presents negative rigidity, namely the deformation characteristic of the stage II, and mainly shows that the transition instability of the upper arc beam 19 can effectively reduce the natural vibration frequency of the structure, isolate the frequency vibration in a larger range and improve the energy consumption effect; in the two-stage deformation mode, due to the mutual constraint of the three-dimensional beam system units, the positive Poisson ratio effect is not obvious, after the transition of the upper arc beam 19 is completed, the deformation characteristic of the stage III is realized, the oblique beams 20 on the two sides are unstable, the whole beam system unit is contracted, the negative Poisson ratio effect is generated, the compaction time of the beam system unit is delayed, the counter force is prevented from being suddenly increased, and the structural safety of equipment is protected.
The above embodiments are merely exemplary embodiments of the present invention, which is not equivalent to the present invention, and the present invention is not limited to the above embodiments. It is intended that all such alterations, modifications, and improvements which fall within the spirit and scope of the invention be considered as within the spirit and essential characteristics thereof.
Claims (10)
1. An energy consumption support comprises a support part and an energy consumption part; the energy dissipation part is characterized by comprising a spherical rolling device and a vertical energy dissipation device; the supporting part is positioned above the spherical rolling device, and the vertical energy dissipation device is positioned below the spherical rolling device; the spherical rolling device comprises a base body with limiting sashes and a bearing sphere limited in each sash; the vertical energy dissipation device comprises a top plate, a bottom plate and a negative-rigidity negative-Poisson ratio energy dissipation element positioned between the top plate and the bottom plate.
2. The dissipative support according to claim 1, wherein the negative stiffness negative poisson's ratio dissipative element is a three-dimensional structure composed of beam-tied units; the beam system unit is of a symmetrical structure consisting of an upper arc beam, two oblique beams and a lower arc beam, and the two oblique beams are respectively arranged at two ends of the upper arc beam and the lower arc beam; the upper arc-shaped beam is formed by connecting a middle convex curved beam and concave curved beams positioned at two sides of the middle convex curved beam; the lower arc beam is a convex short beam.
3. The dissipative support according to claim 2, wherein the negative stiffness negative poisson's ratio dissipative element is a circle or polygon enclosed by the beam-tie units.
4. The dissipative support according to claim 2, wherein the negative stiffness negative poisson's ratio dissipative element is a quadrilateral enclosed by the beam-tie units, and each side of the negative stiffness negative poisson's ratio dissipative element is a structure of multiple rows and multiple columns of beam-tie units distributed in the horizontal direction and the vertical direction simultaneously.
5. The energy dissipating mount of claim 1, wherein said support portion comprises an arcuate plate, an arcuate tube carrier, and a tube carrier support; an arc-shaped supporting plate and a stiffening plate vertical to the supporting plate are arranged in the pipe bracket support; the arc pipe support is positioned on the arc support plate; the arc-shaped plate is positioned on the arc-shaped pipe bracket.
6. The energy dissipating mount of claim 5, wherein the arc length of the inner diameter of said arcuate plate corresponds to a central angle in the range of 120 ° to 180 °.
7. The energy dissipating mount of claim 6, wherein the arcuate plate is a polytetrafluoroethylene plate.
8. The energy dissipating support according to claim 1, wherein the base is comprised of continuous vertical limiting plates, segmented vertical limiting plates, and bottom pallets; the bearing ball body is positioned on the bottom supporting plate and limited in a limiting lattice formed by the continuous vertical limiting plate and the segmented vertical limiting plate.
9. The energy dissipating mount of claim 8, wherein said support sphere is held in a horizontal movement allowance distance of 2-10 cm from said retaining sash; and the continuous vertical limiting plate, the segmented vertical limiting plate and the bottom supporting plate are connected by welding.
10. A gas insulated metal enclosed switchgear system, characterized in that it is supported by a dissipative support according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351978.9A CN114233931B (en) | 2021-11-16 | 2021-11-16 | Energy consumption support and gas-insulated metal-enclosed switchgear system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351978.9A CN114233931B (en) | 2021-11-16 | 2021-11-16 | Energy consumption support and gas-insulated metal-enclosed switchgear system |
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| CN114233931A true CN114233931A (en) | 2022-03-25 |
| CN114233931B CN114233931B (en) | 2023-07-07 |
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| CN202111351978.9A Active CN114233931B (en) | 2021-11-16 | 2021-11-16 | Energy consumption support and gas-insulated metal-enclosed switchgear system |
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| Publication number | Publication date |
|---|---|
| CN114233931B (en) | 2023-07-07 |
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