CN114300295A - Earthing switch for GIS - Google Patents
Earthing switch for GIS Download PDFInfo
- Publication number
- CN114300295A CN114300295A CN202111412515.9A CN202111412515A CN114300295A CN 114300295 A CN114300295 A CN 114300295A CN 202111412515 A CN202111412515 A CN 202111412515A CN 114300295 A CN114300295 A CN 114300295A
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- plate body
- mounting hole
- bolt
- cover plate
- grounding
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- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to a grounding switch for a GIS. Earthing switch for GIS is including the casing that has the mounting hole, still include quiet end structure and moving contact, quiet end structure includes apron and ground connection row, the apron is including being in the outer plate body of casing and being in the plate body towards one side of mounting hole and to the electrically conductive cover that extends in the casing, apron and electrically conductive cover formula structure as an organic whole, the plate body outward flange is removable fixed with the casing, and be equipped with the insulation board between plate body outward flange and the casing, electrically conductive cover stretches into in the mounting hole, the hole of electrically conductive cover forms and supplies moving contact male jack, install on the inner wall of jack and make apron and moving contact electrically conductive touching the finger, the both ends of ground connection row are connected with apron and casing are electrically conductive respectively. An insulating plate is arranged between the plate body and the shell, the insulating plate is simple in structure and convenient to process, and the installation cost of the static contact is reduced; the contact finger is installed in the jack of the conductive sleeve, the cover plate is conductive with the moving contact through the contact finger, and the moving contact can be provided with no contact finger or a contact finger seat, so that the structure of the moving contact is simplified.
Description
Technical Field
The invention belongs to power system equipment, and particularly relates to a grounding switch for a GIS.
Background
The earthing switch is a mechanical switch device for earthing a circuit, and can carry a specified abnormal current for a specified time under an abnormal condition (such as short circuit).
The existing grounding switch comprises a shell, a static end structure and a moving end structure, wherein the moving end structure comprises a moving contact, a contact finger seat is assembled on the moving contact, a spring contact finger is installed at an inner hole of the contact finger seat, the moving contact is electrically connected with a static contact through the spring contact finger, and the moving contact is complex in overall structure because the moving contact needs to be assembled with the contact finger seat. The static end structure comprises a static contact and a grounding bar, in order to ensure the through-current capacity of the grounding loop, the static contact is conducted with the shell through the grounding bar, an epoxy resin insulator is generally required to be poured to realize the fixed installation of the static contact, the epoxy resin is used for realizing the insulation of the static contact and the shell, the process for manufacturing the epoxy resin is complex, and the cost is high.
Disclosure of Invention
The invention aims to provide a grounding switch for a GIS (geographic information system) to solve the technical problems that a moving contact structure in the grounding switch in the prior art is complex and the installation cost of a fixed contact is high.
In order to achieve the purpose, the technical scheme of the grounding switch for the GIS is as follows:
earthing switch for GIS, including the casing that has the mounting hole, still including fixing the quiet end structure of mounting hole department and the moving contact that is located the casing, quiet end structure includes apron and ground connection row, the apron is including being in the outer plate body of casing and being in the plate body towards the one side of mounting hole and to the conductive sleeve of casing extension, apron and conductive sleeve formula structure as an organic whole, the plate body outward flange is removable fixed with the casing, and be equipped with the insulation board between plate body outward flange and the casing, conductive sleeve stretches into in the mounting hole, conductive sleeve's hole formation supplies moving contact male jack, install on the inner wall of jack and touch the finger, quiet end structure is through touching on the apron finger and moving contact electrically conductive, the both ends of ground connection row are connected with apron and casing are electrically conductive respectively.
The beneficial effects are that: the grounding switch for the GIS comprises a shell, a static end structure and a moving contact, wherein the static end structure comprises a cover plate and a grounding bar, the cover plate is communicated with the shell through the grounding bar, an insulating plate is arranged between a plate body of the cover plate and the shell for realizing the insulation of the cover plate and the shell, and the insulating plate is simple in structure, convenient to process and low in cost. Install in the jack of the electrically conductive cover of apron and touch the finger, quiet end structure is electrically conductive with the moving contact through touching the finger on the apron, and the moving contact no longer sets up touches the finger and touches the finger seat, has simplified the structure of moving contact, has solved the comparatively complicated and higher technical problem of static contact installation cost of moving contact structure in the earthing switch of prior art.
In a further improvement, one side of the plate body, which is back to the mounting hole, is provided with a grounding lug which is back to the mounting block and protrudes outwards, and the grounding bar is fixed on the grounding lug.
The beneficial effects are that: design like this, reduce the volume of plate body, and then reduce GIS and use earthing switch's weight.
The improved structure is characterized in that the outer edge of the plate body is fixed with the shell through a bolt, an insulating sleeve is sleeved on a bolt rod of the bolt, an insulating pad is arranged between the bolt head and the plate body to realize insulating isolation of the bolt and the cover plate, the distance between the bolt and the center of the cover plate is greater than the distance between the grounding lug and the center of the cover plate, and the height of the grounding lug protruding out of the plate body is greater than the height of the bolt head from the plate body.
The beneficial effects are that: the bolt is used for connecting flange and casing, and the distance of bolt and apron center is great, can increase the diameter of mounting hole to reduce the volume of casing, the height that the protruding plate body of ground lug is greater than the height of bolt head apart from the plate body, avoids the screwhead to arrange with ground connection and interferes.
The improved structure is characterized in that the outer edge of the plate body is fixed with the shell through a bolt, an insulating sleeve is sleeved on a bolt rod of the bolt, and an insulating pad is arranged between the bolt head and the plate body so as to realize the insulating isolation of the bolt and the cover plate.
The beneficial effects are that: the shell and the cover plate are connected through the bolts, so that the structure is simple, and the installation or the disassembly is convenient.
In a further improvement, the shell is provided with a convex ring which is arranged at the mounting hole and is coaxial with the mounting hole, the outer edge of the plate body is fixed on the end face of the convex ring, and the grounding bar is fixed on the outer peripheral surface of the convex ring.
The beneficial effects are that: by the design, the grounding bar and the cover plate are respectively connected to different positions of the shell, interference cannot be generated, and the structure is more compact.
Further improved, the cover plate is integrally formed by casting.
The beneficial effects are that: the design like this, processing is simple, reduces the assembly number of times.
In a further improvement, the inner side hole of the jack is flush with the inner side hole of the mounting hole.
The beneficial effects are that: design like this, the volume of apron is less, avoids apron and other parts in the casing to interfere.
Further improve, all be equipped with the sealing washer between insulation board and casing, insulation board and the plate body.
The beneficial effects are that: design like this, avoid external dust or steam to get into in the casing, and then influence earthing switch's performance.
In a further improvement, the movable contact is a conductive rod.
The beneficial effects are that: by the design, the moving contact is simple in structure and convenient to process.
The improved structure is characterized in that the cover plate is provided with a supporting lug for externally connecting a supporting leg, and the supporting lug is arranged on one side of the plate body, back to the mounting hole, and protrudes outwards, back to the mounting hole.
The beneficial effects are that: by means of the design, the shell can be supported through the supporting lug.
Drawings
Fig. 1 is a schematic structural diagram of a dead end structure in a grounding switch for a GIS according to the present invention;
FIG. 2 is a right side view of FIG. 1;
in the figure: 11. a housing; 12. a plate body; 13. a ground bar; 14. an insulating plate; 15. a contact finger; 16. an insulating pad; 17. an insulating sleeve; 18. a seal ring; 19. a grounding lug; 20. supporting the projection; 21. a conductive sleeve; 22. a convex ring; 23. mounting holes; 24. and (4) inserting the jack.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the grounding switch for GIS of the present invention:
the grounding switch for the GIS is suitable for the GIS equipment of the ultrahigh voltage power station. In this embodiment, as shown in fig. 1, the grounding switch for GIS includes a housing 11 having a mounting hole 23, a static end structure fixed at the mounting hole 23, and a movable contact (not shown) located in the housing 11, where the housing 11 has a protruding ring 22 disposed at the mounting hole 23 and coaxial with the mounting hole 23, and in this embodiment, the movable contact is a conductive rod.
In this embodiment, as shown in fig. 1, the stationary end structure includes a cover plate and a ground bar 13, the cover plate is integrally formed by casting, the cover plate includes a plate body 12 located outside the housing 11 and a conductive sleeve 21 located on a side of the plate body 12 facing the mounting hole 23, and the conductive sleeve 21 extends along an axial direction of the mounting hole 23 and is installed in the mounting hole 23 in a penetrating manner. In other embodiments, the cover plate is machined.
In this embodiment, as shown in fig. 1 and fig. 2, an inner hole of the conductive sleeve 21 forms an insertion hole 24 for inserting the movable contact, two contact fingers 15 common to products are installed on an inner wall of the insertion hole 24, and the static end structure is electrically conductive with the movable contact through the contact finger 15 on the cover plate. The inner side opening of the insertion hole 24 is flush with the inner side opening of the mounting hole 23 to prevent the conductive sleeve 21 from interfering with other parts in the housing 11, and the opening of the insertion hole 24 for the movable contact to extend into is provided with a chamfer so that the movable contact can be conveniently inserted into the insertion hole.
In this embodiment, as shown in fig. 1 and fig. 2, a side of the plate body 12 facing away from the mounting hole 23 is provided with a grounding lug 19 protruding outward away from the mounting hole, one end of the grounding bar 13 is fixed to the grounding lug 19 by a bolt, and the other end of the grounding bar 13 is fixed to the outer circumferential surface of the protruding ring 22 by a bolt. The plate body 12 is provided with a supporting projection 20 at a position opposite to the grounding projection 19, and the supporting projection 20 is used for externally connecting a supporting leg.
In this embodiment, as shown in fig. 1 and fig. 2, the outer edge of the plate 12 is fixed on the end surface of the convex ring 22 by bolts, and the grounding bar 13 and the cover plate are respectively connected to different positions of the housing 11, so that the structure of the grounding switch for the GIS is more compact; an insulating sleeve 17 is sleeved on a bolt rod of the bolt, and an insulating pad 16 is arranged between the bolt head and the plate body 12 so as to realize insulating isolation between the bolt and the cover plate and between the bolt and the shell body 11. The distance between the bolt and the center of the cover plate is greater than the distance between the grounding lug 19 and the center of the cover plate, so that the volume of the shell 11 is reduced, the inner diameter of the mounting hole 23 is increased, and the mounting space of the cover plate is further ensured. Moreover, the insulating plate 14 is arranged between the plate body 12 and the convex ring 22 to realize the insulation between the plate body 12 and the shell 11, and the insulating plate 14 has a simple structure, is convenient to process and has low cost. Sealing rings 18 are respectively installed between the insulating plate 14 and the convex ring 22, and between the insulating plate 14 and the plate body 12, so as to prevent dust or water vapor in the external environment from entering the casing 11, and further influence the use performance of the grounding switch for the GIS. In this embodiment, the insulating plate 14 is an epoxy glass cloth laminate.
The main loop of the grounding switch for the GIS is the moving contact → the contact finger → the cover plate → the grounding bar → the shell, and the cover plate integrates the static contact seat, so that the functions of sealing, mounting the contact finger and mounting the grounding bar can be realized, and the integration level of the product is higher. The static contact seat is integrated behind the cover plate, the cover plate can be insulated from the shell through the insulating plate, compared with the prior art that an epoxy resin insulator is poured, the insulating plate is simpler in structure and lower in cost, compared with a mounting hole with a smaller size on the shell in the prior art, the size of the mounting hole on the shell of the grounding switch can be properly increased, and then a contact finger with a normal specification is used, so that the capacity of a static end for resisting short-circuit current is improved.
Because the contact finger is installed on the cover plate of the static end structure, the static end structure is electrically conducted with the moving contact through the contact finger on the cover plate, the moving contact is not provided with a contact finger seat and a contact finger any more, the structure of the moving contact is greatly simplified, and the technical problem that the moving contact is complex in structure in the prior art is solved. The insulating isolation is realized between the cover plate and the shell through the insulating plate, the insulating plate is simple in structure and lower in cost, and the technical problems that in the prior art, an epoxy resin insulator needs to be poured to realize the insulation of the static contact and the shell, the epoxy resin process is complex, and the cost is high are solved.
Embodiment 2 of the grounding switch for GIS of the present invention:
this example differs from example 1 in that: in this embodiment, the plate body is not provided with the grounding lug, the grounding bar is fixed on one side of the plate body deviating from the mounting hole, and the plate body is provided with a counter bore for avoiding the bolt head of the connecting bolt of the outer edge of the plate body and the boss.
Embodiment 3 of the grounding switch for GIS of the present invention:
this example differs from example 1 in that: in this embodiment, the distance between the bolt and the center of the cover plate is smaller than the distance between the grounding lug and the center of the cover plate. In other embodiments, the distance between the bolt and the center of the cover plate is equal to the distance between the grounding lug and the center of the cover plate, and the grounding protrusions and the bolt are distributed at different circumferential positions.
Embodiment 4 of the grounding switch for GIS of the present invention:
this example differs from example 1 in that: in this embodiment, the structure that corresponds the mounting hole position on the casing is the flat board, and the radial extension along the mounting hole is arranged to the flat board, and plate body outward flange and ground connection are arranged and are all fixed on dull and stereotyped lateral surface.
Embodiment 5 of the grounding switch for GIS of the present invention:
this example differs from example 1 in that: in this embodiment, the inner side hole opening of the insertion hole is higher than the inner side hole opening of the mounting hole.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
- The grounding switch for the GIS comprises a shell (11) with a mounting hole (23); the device is characterized by further comprising a static end structure fixed at the mounting hole (23) and a movable contact positioned in the shell (11), wherein the static end structure comprises a cover plate and a grounding bar (13), the cover plate comprises a plate body (12) positioned outside the shell (11) and a conductive sleeve (21) positioned on one side of the plate body (12) facing the mounting hole (23) and extending into the shell (11), the cover plate and the conductive sleeve (21) are of an integrated structure, the outer edge of the plate body (12) is detachably fixed with the shell (11), and an insulation board (14) is arranged between the outer edge of the plate body (12) and the shell (11), the conductive sleeve (21) extends into the mounting hole (23), an inner hole of the conductive sleeve (21) forms an insertion hole (24) for the movable contact to be inserted into, a contact finger (15) is mounted on the inner wall of the insertion hole (24), the static end structure is electrically connected with the movable contact through the contact finger (15) on the cover plate, and two ends of the grounding bar (13) are respectively electrically connected with the cover plate and the shell (11).
- 2. The grounding switch for the GIS according to claim 1, wherein the side of the plate body (12) facing away from the mounting hole (23) is provided with a grounding lug (19) protruding outwards away from the mounting hole, and the grounding bar (13) is fixed on the grounding lug (19).
- 3. The earthing switch for the GIS according to claim 2, wherein the outer edge of the plate body (12) is fixed with the housing (11) through a bolt, the bolt rod of the bolt is sleeved with an insulating sleeve (17), an insulating pad (16) is arranged between the bolt head and the plate body (12) to realize the insulating isolation of the bolt and the cover plate, the distance between the bolt and the center of the cover plate is greater than the distance between the earthing lug (19) and the center of the cover plate, and the height of the earthing lug (19) protruding out of the plate body (12) is greater than the height of the bolt head from the plate body (12).
- 4. The earthing switch for the GIS according to claim 1 or 2, characterized in that the outer edge of the plate body (12) is fixed with the housing (11) through a bolt, the bolt rod of the bolt is sleeved with an insulating sleeve (17), and an insulating pad (16) is arranged between the bolt head and the plate body (12) to realize the insulating isolation between the bolt and the cover plate.
- 5. The earthing switch for GIS according to claim 1, 2 or 3, wherein said housing (11) has a collar (22) provided at the mounting hole (23) and coaxial with the mounting hole (23), the outer edge of the plate body (12) is fixed to the end face of the collar (22), and the earth bar (13) is fixed to the outer peripheral surface of the collar (22).
- 6. The earthing switch for GIS according to claim 1, 2 or 3, wherein the cover plate is integrally formed by casting.
- 7. The earthing switch for GIS according to claim 1, 2 or 3, characterized in that the inner side aperture of the insertion hole (24) is flush with the inner side aperture of the mounting hole (23).
- 8. The earthing switch for GIS of claim 1, 2 or 3, wherein a sealing ring (18) is provided between the insulating plate (14) and the housing (11), and between the insulating plate (14) and the plate body (12).
- 9. The grounding switch for the GIS according to claim 1, 2 or 3, wherein the movable contact is a conductive rod.
- 10. The grounding switch for the GIS according to claim 1, 2 or 3, wherein the cover plate is provided with a supporting lug (20) for externally connecting a supporting leg, and the supporting lug (20) is arranged on one side of the plate body (12) facing away from the mounting hole and protrudes outwards facing away from the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111412515.9A CN114300295A (en) | 2021-11-25 | 2021-11-25 | Earthing switch for GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111412515.9A CN114300295A (en) | 2021-11-25 | 2021-11-25 | Earthing switch for GIS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114300295A true CN114300295A (en) | 2022-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111412515.9A Pending CN114300295A (en) | 2021-11-25 | 2021-11-25 | Earthing switch for GIS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114300295A (en) |
Citations (9)
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|---|---|---|---|---|
| WO2005062325A1 (en) * | 2003-12-19 | 2005-07-07 | Mitsubishi Denki Kabushiki Kaisha | Disconnector |
| WO2005074085A2 (en) * | 2004-01-30 | 2005-08-11 | Siemens Aktiengesellschaft | High-voltage outdoor bushing arrangement |
| CN202633139U (en) * | 2012-07-04 | 2012-12-26 | 乐星湖开电气（湖北）有限公司 | Three-station isolating grounding switch with double guiding rod and connection rod transmission structure |
| CN202736817U (en) * | 2012-08-23 | 2013-02-13 | 中国西电电气股份有限公司 | High-voltage isolation/grounding switch device |
| CN202871668U (en) * | 2012-10-17 | 2013-04-10 | 中国西电电气股份有限公司 | Three-position switch for combined electric appliance |
| WO2013079354A1 (en) * | 2011-11-28 | 2013-06-06 | Abb Technology Ag | Earth switch for a gas-insulated medium- or high-voltage system |
| US20140116859A1 (en) * | 2011-06-28 | 2014-05-01 | Hyundai Heavy Industries Co., Ltd. | 3-way switch for a gas-insulated apparatus |
| CN207338214U (en) * | 2017-11-10 | 2018-05-08 | 湖南长高电气有限公司 | A kind of high speed grounding switch of new 110kv compound combined electrical equipments |
| CN110718409A (en) * | 2019-07-12 | 2020-01-21 | 河南平高电气股份有限公司 | Isolation-grounding combined switch and isolation static contact supporting conductor thereof |
-
2021
- 2021-11-25 CN CN202111412515.9A patent/CN114300295A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005062325A1 (en) * | 2003-12-19 | 2005-07-07 | Mitsubishi Denki Kabushiki Kaisha | Disconnector |
| WO2005074085A2 (en) * | 2004-01-30 | 2005-08-11 | Siemens Aktiengesellschaft | High-voltage outdoor bushing arrangement |
| US20140116859A1 (en) * | 2011-06-28 | 2014-05-01 | Hyundai Heavy Industries Co., Ltd. | 3-way switch for a gas-insulated apparatus |
| WO2013079354A1 (en) * | 2011-11-28 | 2013-06-06 | Abb Technology Ag | Earth switch for a gas-insulated medium- or high-voltage system |
| CN202633139U (en) * | 2012-07-04 | 2012-12-26 | 乐星湖开电气（湖北）有限公司 | Three-station isolating grounding switch with double guiding rod and connection rod transmission structure |
| CN202736817U (en) * | 2012-08-23 | 2013-02-13 | 中国西电电气股份有限公司 | High-voltage isolation/grounding switch device |
| CN202871668U (en) * | 2012-10-17 | 2013-04-10 | 中国西电电气股份有限公司 | Three-position switch for combined electric appliance |
| CN207338214U (en) * | 2017-11-10 | 2018-05-08 | 湖南长高电气有限公司 | A kind of high speed grounding switch of new 110kv compound combined electrical equipments |
| CN110718409A (en) * | 2019-07-12 | 2020-01-21 | 河南平高电气股份有限公司 | Isolation-grounding combined switch and isolation static contact supporting conductor thereof |
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