CN201478730U - Pressure balancing corrugated pipe used for GIS equipment - Google Patents
Pressure balancing corrugated pipe used for GIS equipment Download PDFInfo
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- CN201478730U CN201478730U CN2009201531055U CN200920153105U CN201478730U CN 201478730 U CN201478730 U CN 201478730U CN 2009201531055 U CN2009201531055 U CN 2009201531055U CN 200920153105 U CN200920153105 U CN 200920153105U CN 201478730 U CN201478730 U CN 201478730U
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- corrugated pipe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model particularly discloses a pressure balancing corrugated pipe used for GIS equipment, which comprises a work corrugated pipe, a balancing corrugated pipe, a three-way valve and a double-head screw rod, wherein one end of the work corrugated pipe is connected with a flange of the three-way valve, the other end of the corrugated pipe is a work end and is used for being connected with a high-position bus, one end of the balancing corrugated pipe is connected with the flange of the three-way valve, the other end of the balancing corrugated pipe is sealed, a right-angle end of the three-way valve is opened downwardly for being connecting with a low-position bus, and both ends of the double-head screw rod are respectively fixed to the work end of the work corrugated pipe and the sealed end of the balancing corrugated pipe. After the adoption of the pressure balancing corrugated pipe of the utility model, the requirement of high-position and low-position bus conversion of the end bus is met.
Description
Technical field
The utility model relates to the switchgear field, particularly relates to a kind of pressure-equalizing corrugated pipe of the GIS of being used for equipment.
Background technology
Along with developing rapidly of national economy and power industry, scale of power is huge day by day, gas-insulated metal-enclosed type switchgear (GIS:Gas Insulated Switchgear) because of its operation be subjected to external environment influence little, do not need advantages such as regular maintenance, floor space be little, in transformer station, be widely adopted in recent years.
GIS equipment is meant the primary equipment except that transformer in the transformer station, comprise bus, circuit breaker, isolating switch, earthed switch, voltage transformer, current transformer, lightning arrester, cable termination, turnover thread casing etc., organically combine through optimal design, by seal of vessel, internal tank is full of sulfur hexafluoride gas to insulate.
In actual applications, in order to eliminate the infringement of expanding with heat and contract with cold GIS equipment being caused of bus, pressure-equalizing corrugated pipe need be set on bus.
Referring to Fig. 1, be the pressure-equalizing corrugated duct ligation composition of traditional linear pattern.
The pressure-equalizing corrugated pipe of traditional linear pattern comprises end pipe 1a, work bellows 2a, balance bellows 3a, pull bar 4a and end plate 5a etc.
Traditional bellows is provided with two work bellowss, lays respectively at the two ends of pressure-equalizing corrugated pipe.Balance bellows 3a is positioned at the centre of pressure-equalizing corrugated pipe.Respectively balance bellows 3a is linked to each other with the work bellows 2a of a side by pull bar 4a.
During practical application, bus is connected with end plate 5a respectively.When the bus of bellows one side because of expanding with heat and contract with cold telescopic variation takes place, stretch with the work bellows 2a of described bus homonymy thereupon.Drive balance bellows 3a action by the pull bar 4a that links to each other with described work bellows 2a.Thus, alleviated bus and expanded with heat and contract with cold, avoided GIS equipment is caused damage the influence of GIS equipment.
But the pressure-equalizing corrugated pipe of traditional linear pattern can only be used for straight edge line, can't satisfy the needs that the end bus has bus conversion place of high status.Simultaneously, the pressure-equalizing corrugated pipe of traditional linear pattern need be provided with three bellowss simultaneously, and its manufacturing cost is than higher.
The utility model content
Technical problem to be solved in the utility model provides a kind of pressure-equalizing corrugated pipe of the GIS of being used for equipment, can satisfy the needs that the end bus has conversion place of high low level bus.
For solving the problems of the technologies described above, the utility model provides a kind of pressure-equalizing corrugated pipe of the GIS of being used for equipment, comprises work bellows, balance bellows, and described pressure-equalizing corrugated pipe also comprises threeway and double threaded screw; Wherein,
Described work bellows one end links to each other with the flange of described threeway, and the other end is the working end, is used to connect high-order bus; Described balance bellows one end links to each other with the flange of described threeway, other end sealing; The right angle end opening of described threeway is downward, is used to connect the low level bus;
Described double threaded screw two ends are separately fixed at the working end of work bellows and the sealed end of balance bellows.
Preferably, described pressure-equalizing corrugated pipe also comprises first group of short rod;
One end of described first group of short rod is fastened on the working end of work bellows, and its other end is connected with work bellows link, but not fastening;
At the described first group of short rod of distance each default safe length place of the right and left, set bolt is set respectively with work bellows link junction.
Preferably, described pressure-equalizing corrugated pipe also comprises second group of short rod;
One end of described second group of short rod is fastened on balance sylphon seal end, and its other end is connected with balance bellows link, but not fastening;
Each default safe length place of the right and left in described second group of short rod of distance and balance bellows link junction is provided with set bolt respectively.
Preferably, described double threaded screw is single long bolt.
Preferably, described double threaded screw is formed by the connector butt joint by at least two double threaded screws.
Preferably, described connector is the siphunculus of hollow; One end of two double threaded screws is screwed into from the two ends of connector respectively, is undertaken fastening by bolt.
Preferably, smear fluid sealant in the full week of bolt at described connector two ends.
Preferably, described pressure-equalizing corrugated pipe also comprises disc insulator, has the effect of insulation and centre of support conductor.
Preferably, described pressure-equalizing corrugated pipe also comprises the connection pipe arrangement; Described connection pipe arrangement is a three-way pipe, its first termination work bellows, the second termination balance bellows, the 3rd termination density meter.
Preferably, described pressure-equalizing corrugated pipe also comprises the water conservancy diversion row on the shell that is arranged on pressure-equalizing corrugated pipe; Described water conservancy diversion row is several fonts.
Compared with prior art, the utlity model has following advantage:
The pressure-equalizing corrugated pipe that is used for GIS equipment described in the utility model comprises work bellows, balance bellows, threeway and double threaded screw; Described work bellows links to each other with two flanges of threeway respectively with the balance bellows; The other end sealing of balance bellows; The other end of work bellows is in free state, is the working end, is used to connect high-order bus; The right angle end opening of described threeway is downward, is used to connect the low level bus; Double threaded screw two ends difference bolt is at the working end of work bellows and the sealed end of balance bellows.
When described pressure-equalizing corrugated pipe is used for the end bus high low level bus conversion place is arranged, only need the working end of high-order bus with the work bellows linked to each other, the low level bus is linked to each other with the right angle end of threeway, can realize that the end bus has the mating operation of high low level bus conversion place.
When the high-order bus of the working end that is connected the work bellows because of expanding with heat and contract with cold telescopic variation takes place, must cause the expanding-contracting action of work bellows.By double threaded screw, drive the balance bellows and carry out expanding-contracting action with the work bellows.Thus, can absorb the axial dilatation of GIS equipment that expands with heat and contract with cold and cause because of bus, powerful guarantee the safety of GIS equipment.Simultaneously, the utility model only needs a work bellows and a balance bellows, has saved manufacturing cost greatly.
Description of drawings
Fig. 1 is traditional pressure-equalizing corrugated duct ligation composition of linear pattern;
Fig. 2 is the pressure-equalizing corrugated duct ligation composition that is used for GIS equipment of the present utility model;
Fig. 3 is the pressure-equalizing corrugated pipe end view that is used for GIS equipment of the present utility model;
Fig. 4 is that connector of the present utility model and double threaded screw cooperate installation diagram;
Fig. 5 is a connection pipe arrangement installation diagram of the present utility model;
Fig. 6 is a baffler profile schematic diagram of the present utility model.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
With reference to Fig. 2 and Fig. 3, be respectively the pressure-equalizing corrugated duct ligation composition and the end view of the GIS of being used for equipment of the present utility model.
Described pressure-equalizing corrugated pipe comprises: work bellows 1, balance bellows 2 and threeway 3.
Pressure-equalizing corrugated pipe of the present utility model only needs a work bellows and a balance bellows.Wherein, work bellows 1 and balance bellows 2 are provided with the two ends of pressure-equalizing corrugated pipe respectively.
Work bellows 1 links to each other with the flange of threeway 3 respectively with balance bellows 2, realizes being communicated with by threeway 3.The right angle end opening of described threeway 3 is provided with downwards.
By among the figure as can be known, the end that do not link to each other with threeway 3 of work bellows 1 is in free state, connects high-order bus when being used for work, can claim that this end is the working end of work bellows 1.Accordingly, the end that links to each other with threeway 3 of work bellows 1 is called the link of work bellows 1.
The end that balance bellows 2 does not link to each other with threeway 3 is in sealing state, as shown in Figure 2.First seal cover 4 with the 2 supporting installations of balance bellows is set.Realize the overall tightness of GIS equipment by this first seal cover 4.Thus, an end that can claim balance bellows 2 not link to each other with threeway 3 is a sealed end, and corresponding, its end that links to each other with threeway 3 is called the link of balance bellows 2.
Referring to Fig. 2, the right angle end opening of threeway 3 is provided with downwards, is used to connect the low level bus.
Simultaneously, for conveniently docking and being convenient to processing, end is provided with transition cover plate 5 at the right angle of threeway 3.
When pressure-equalizing corrugated pipe described in the utility model is used for the end bus high low level bus conversion place is arranged, only need the working end of high-order bus with work bellows 1 linked to each other, the low level bus is linked to each other with the right angle end of threeway 3, can realize that the end bus has the mating operation of high low level bus conversion place.
Referring to Fig. 2, pressure-equalizing corrugated pipe of the present utility model also comprises double threaded screw 6.The two ends difference bolt of described double threaded screw 6 is at the working end of work bellows 1 and the sealed end of balance bellows 2.
When the high-order bus of the working end that is connected work bellows 1 because of expanding with heat and contract with cold telescopic variation takes place, must cause the expanding-contracting action of work bellows 1.By double threaded screw 6, drive balance bellows 2 and carry out expanding-contracting action with work bellows 1.Thus, can absorb the axial dilatation of GIS equipment that expands with heat and contract with cold and cause because of bus, powerful guarantee the safety of GIS equipment, also guaranteed simultaneously balance to threeway 3 pressure and thrust.Simultaneously, the utility model only needs a work bellows and a balance bellows, has saved manufacturing cost greatly.
In actual applications, double threaded screw 6 can directly adopt a long bolt, also can be formed by many short screw rod butt joints by connector.
Among the utility model embodiment, double threaded screw 6 shown in Figure 2 is by a connector 7 two double threaded screws 61 and 62 butt joints to be formed.
Its concrete docking mode as shown in Figure 4.Fig. 4 is that connector of the present utility model and double threaded screw cooperate installation diagram.Described connector 7 is the siphunculus of hollow.One end of double threaded screw 61 and 62 is screwed into from the two ends of connector 7 respectively, and is undertaken fasteningly by bolt, realize the butt joint of two double threaded screws.
In order further to strengthen the sealing of butt joint, respectively connector 7 bolts at two ends full week smear fluid sealant, guarantee that butt joint is firmly.
When adopting many double threaded screws to dock, only need the corresponding number that increases connector to get final product.
Referring to Fig. 2, pressure-equalizing corrugated pipe of the present utility model also comprises respectively first group of short rod 8 and the second group of short rod 9 with work bellows 1 and the 2 supporting settings of balance bellows.
This first group of short rod 8 and the 1 supporting installation of work bellows.As shown in Figure 2, an end of first group of short rod 8 passes through the bolted bolt in work bellows 1 working end.The bolt of the other end of first group of short rod 8 and work bellows 1 link, but not fastening.At first group of short rod of distance 8 each default safe length place of the right and left, set bolt 81 and 82 are set respectively with work bellows 1 link junction.
Described default safe length is work bellows 1 maximum changing value of dilatation axially.By at distance each default safe length place of the right and left, described junction set bolt 81 and 82 being set, maximum deformation quantity that can restraint of labour bellows 1.It is stressed or tension when producing distortion when work bellows 1, and its maximum deformation quantity can not surpass set bolt 81 and 82 positions.Thus, guaranteed the work safety of work bellows 1, avoided work bellows 1 to cause damage, prolonged work bellows 1 working life because of excessively stretching or compressing.
In the practical application, according to the concrete value of setting default safe length such as actual model, specification of work bellows 1.In the utility model, this default safe length is set at 50mm.
Referring to Fig. 2, this second group of short rod 9 and the 2 supporting installations of balance bellows.One end of second group of short rod 9 passes through the bolted bolt at balance bellows 2 sealed ends.The other end of second group of short rod 9 and balance bellows 2 link bolts, but not fastening.At distance second group of short rod 9 each default safe length place of the right and left, set bolt 91 and 92 are set respectively with balance bellows 2 link junctions.
Described default safe length is balance bellows 2 maximum changing value of dilatation axially.By at distance each default safe length place of the right and left, described junction set bolt 91 and 92 being set, maximum deformation quantity that can limiting balance bellows 2.It is stressed or tension when producing distortion when balance bellows 2, and its maximum deformation quantity can not surpass set bolt 91 and 92 positions.Thus, guaranteed the work safety of balance bellows 2, avoided balance bellows 2 to cause damage, prolonged balance bellows 2 working lives because of excessively stretching or compressing.
In the practical application, according to the concrete value of setting default safe length such as the actual model of balance bellows 2, specification.In the utility model, this default safe length is set at 50mm.
Preferably, pressure-equalizing corrugated pipe described in the utility model also comprises disc insulator 10, has insulation and centre of support conductor effect.
Described disc insulator 10 is arranged between work bellows 1 and the balance bellows 2, in order to guarantee the synchronous variation of work bellows 1 and balance bellows 2, connection pipe arrangement 11 is set.
Referring to shown in Figure 5, described connection pipe arrangement 11 is a three-way pipe, its first termination work bellows, 1, the second termination balance bellows, 2, the three termination density meters.Thus, when guaranteeing the sealing of GIS equipment integral, can also guarantee the connection between work bellows 1 and the balance bellows 2, realize the synchronous variation of the two.
Preferably, on the shell of pressure-equalizing corrugated pipe described in the utility model, water conservancy diversion row is installed.This water conservancy diversion row be installed on the outer flange and shell of corresponding threeway position.
In the practical application,,, on the shell of pressure-equalizing corrugated pipe, be provided with water conservancy diversion row is installed for the induced current between the shell that makes the GIS equipment integral can circulate mutually because bellows can't guarantee the through-current capability of shell.
The pressure-equalizing corrugated Guan Yin effect of being expanded with heat and contract with cold described in the utility model, the axial displacement of generation is bigger.In order to cooperate the above-mentioned characteristic of bellows, described water conservancy diversion row is done the fold design, profile is several fonts, specifically as shown in Figure 6.Adopt the water conservancy diversion row of this form, bigger distortion can be arranged, satisfy the requirement of pressure-equalizing corrugated pipe described in the utility model.
More than the pressure-equalizing corrugated pipe of a kind of GIS of being used for equipment provided by the utility model is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. a pressure-equalizing corrugated pipe that is used for GIS equipment comprises work bellows, balance bellows, it is characterized in that, described pressure-equalizing corrugated pipe also comprises threeway and double threaded screw; Wherein,
Described work bellows one end links to each other with the flange of described threeway, and the other end is the working end, is used to connect high-order bus; Described balance bellows one end links to each other with the flange of described threeway, other end sealing; The right angle end opening of described threeway is downward, is used to connect the low level bus;
Described double threaded screw two ends are separately fixed at the working end of work bellows and the sealed end of balance bellows.
2. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 1 is characterized in that described pressure-equalizing corrugated pipe also comprises first group of short rod;
One end of described first group of short rod is fastened on the working end of work bellows, and its other end is connected with work bellows link, but not fastening;
At the described first group of short rod of distance each default safe length place of the right and left, set bolt is set respectively with work bellows link junction.
3. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 1 is characterized in that described pressure-equalizing corrugated pipe also comprises second group of short rod;
One end of described second group of short rod is fastened on balance sylphon seal end, and its other end is connected with balance bellows link, but not fastening;
Each default safe length place of the right and left in described second group of short rod of distance and balance bellows link junction is provided with set bolt respectively.
4. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 1 is characterized in that described double threaded screw is single long bolt.
5. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 1 is characterized in that, described double threaded screw is formed by the connector butt joint by at least two double threaded screws.
6. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 5 is characterized in that described connector is the siphunculus of hollow; One end of two double threaded screws is screwed into from the two ends of connector respectively, is undertaken fastening by bolt.
7. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 6 is characterized in that, smears fluid sealant in the full week of bolt at described connector two ends.
8. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 1 is characterized in that described pressure-equalizing corrugated pipe also comprises disc insulator, has the effect of insulation and centre of support conductor.
9. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 8 is characterized in that described pressure-equalizing corrugated pipe also comprises the connection pipe arrangement; Described connection pipe arrangement is a three-way pipe, its first termination work bellows, the second termination balance bellows, the 3rd termination density meter.
10. the pressure-equalizing corrugated pipe that is used for GIS equipment according to claim 1 is characterized in that, described pressure-equalizing corrugated pipe also comprises the water conservancy diversion row on the shell that is arranged on pressure-equalizing corrugated pipe; Described water conservancy diversion row is several fonts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201531055U CN201478730U (en) | 2009-06-24 | 2009-06-24 | Pressure balancing corrugated pipe used for GIS equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201531055U CN201478730U (en) | 2009-06-24 | 2009-06-24 | Pressure balancing corrugated pipe used for GIS equipment |
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| CN201478730U true CN201478730U (en) | 2010-05-19 |
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| CN2009201531055U Expired - Lifetime CN201478730U (en) | 2009-06-24 | 2009-06-24 | Pressure balancing corrugated pipe used for GIS equipment |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136684A (en) * | 2010-12-30 | 2011-07-27 | 上海思源高压开关有限公司 | Radial compensation bus bar used for high-voltage switch |
| CN102528365A (en) * | 2012-02-29 | 2012-07-04 | 沈阳汇博热能设备有限公司 | Big-diameter force balancing corrugated pipe compensator assembling device and manufacture method of compensator |
| CN104934916A (en) * | 2015-05-29 | 2015-09-23 | 河南平芝高压开关有限公司 | Connecting conductor, bus connecting structure and detachable bus used for GIS equipment |
| CN106486897A (en) * | 2016-09-29 | 2017-03-08 | 河南平高电气股份有限公司 | Busbar assembly and bus connection structure |
| CN108183451A (en) * | 2017-12-29 | 2018-06-19 | 山东电工电气日立高压开关有限公司 | A kind of novel 1100kV GIS bus structures |
| CN109755891A (en) * | 2019-01-30 | 2019-05-14 | 上海西门子高压开关有限公司 | Busbar assembly and Cubicle Gas-Insulated Switchgear |
| CN110739646A (en) * | 2019-09-27 | 2020-01-31 | 平高集团有限公司 | radial compensation units for GIL and GIL |
| CN111492453A (en) * | 2017-12-21 | 2020-08-04 | 西门子股份公司 | Drive rod with compensation element |
| CN112736750A (en) * | 2020-11-27 | 2021-04-30 | 河南平高电气股份有限公司 | Combined force balance structure for GIS equipment |
| CN113864560A (en) * | 2021-08-18 | 2021-12-31 | 韦玉婷 | PVC resistance to compression bellows |
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2009
- 2009-06-24 CN CN2009201531055U patent/CN201478730U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136684A (en) * | 2010-12-30 | 2011-07-27 | 上海思源高压开关有限公司 | Radial compensation bus bar used for high-voltage switch |
| CN102136684B (en) * | 2010-12-30 | 2013-06-19 | 上海思源高压开关有限公司 | Radial compensation bus bar used for high-voltage switch |
| CN102528365A (en) * | 2012-02-29 | 2012-07-04 | 沈阳汇博热能设备有限公司 | Big-diameter force balancing corrugated pipe compensator assembling device and manufacture method of compensator |
| CN104934916A (en) * | 2015-05-29 | 2015-09-23 | 河南平芝高压开关有限公司 | Connecting conductor, bus connecting structure and detachable bus used for GIS equipment |
| CN104934916B (en) * | 2015-05-29 | 2017-11-14 | 河南平芝高压开关有限公司 | It is a kind of to connect conductor, bus connection structure and for the detachable bus in GIS device |
| CN106486897A (en) * | 2016-09-29 | 2017-03-08 | 河南平高电气股份有限公司 | Busbar assembly and bus connection structure |
| CN111492453A (en) * | 2017-12-21 | 2020-08-04 | 西门子股份公司 | Drive rod with compensation element |
| CN108183451A (en) * | 2017-12-29 | 2018-06-19 | 山东电工电气日立高压开关有限公司 | A kind of novel 1100kV GIS bus structures |
| CN109755891A (en) * | 2019-01-30 | 2019-05-14 | 上海西门子高压开关有限公司 | Busbar assembly and Cubicle Gas-Insulated Switchgear |
| CN109755891B (en) * | 2019-01-30 | 2024-02-02 | 上海西门子高压开关有限公司 | Bus assembly and gas-insulated metal-enclosed switchgear |
| CN110739646A (en) * | 2019-09-27 | 2020-01-31 | 平高集团有限公司 | radial compensation units for GIL and GIL |
| CN112736750A (en) * | 2020-11-27 | 2021-04-30 | 河南平高电气股份有限公司 | Combined force balance structure for GIS equipment |
| CN112736750B (en) * | 2020-11-27 | 2023-05-26 | 河南平高电气股份有限公司 | Combined force balance structure for GIS equipment |
| CN113864560A (en) * | 2021-08-18 | 2021-12-31 | 韦玉婷 | PVC resistance to compression bellows |
| CN113864560B (en) * | 2021-08-18 | 2023-10-24 | 韦玉婷 | PVC compressive corrugated pipe |
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