Insulating flange, grounding switch and working method

Abstract

The invention discloses an insulating flange, a grounding switch and a working method, and belongs to the technical field of high-pressure gas insulated metal-enclosed switchgear. According to the insulating flange, a movable-side contact seat is embedded in an insulating part in an integrated pouring mode, and a movable-side contact finger is arranged in the movable-side contact seat, so that the through-flow requirement is met; the moving side contact seat is provided with a grounding terminal plate extending out of the insulating part, so that the requirement of direct grounding is met; edge conductor inserts are arranged on the upper surface and the lower surface of the insulating part and can be fixedly connected with the movable side shell and the static side shell, and the supporting requirement is met; the insulating flange can simultaneously meet the requirements of insulation, sealing, supporting, through-flow and direct grounding of the grounding switch in a limited space, and can simplify a movable side assembly structure of the grounding switch; by adopting the insulating flange, various functional requirements in a limited space can be met, and the development direction of miniaturization of a grounding switch is further met; the insulating flange is simple in structure and principle, convenient to manufacture and use and high in functionality, and has good popularization and application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage gas-insulated metal-enclosed switchgear, and in particular relates to an insulating flange, a grounding switch and a working method. Background Art

[0002] The grounding switch is used in high-voltage lines. When the line is normally energized, the grounding switch is in the open state. When the line fails and needs to be repaired or needs to be quickly grounded, the grounding switch is closed, and the moving contact of the grounding switch is connected to the static contact, which is indirectly connected to the GIS inner conductor to ground the GIS equipment. At present, the basic structure of the grounding switch used for high-voltage gas-insulated metal-enclosed switchgear (GIS) includes two parts, the moving side and the static side. The moving side shell and the static side shell are separated by an insulating flange.

[0003] The existing insulating flange for grounding switch only plays the role of insulation isolation and sealing between the moving side housing and the static side housing of the grounding switch, and fails to give full play to more functions in a limited space, that is, it cannot meet the requirements of multiple functions in a limited space, which is not conducive to the development direction of miniaturization of grounding switch; In addition, the grounding terminal in the prior art includes a column insulator, which includes a central conductive column and an insulating flange injection-molded with the central conductive column, and the central conductive column is made of copper alloy; the temperature expansion coefficient of copper material is α=18.7×10 -6 K -1 , the temperature expansion coefficient of epoxy resin is α = 26 × 10 -6 K -1 , because the temperature expansion coefficients of the two materials are quite different, when the temperature of the installation environment changes, the internal residual stress of the central conductive column is relatively large, and the joint surface is prone to cracking. Although other methods are used in the prior art to seal the grounding terminal of the grounding switch, which can prevent the grounding switch from leaking due to cracking of the column insulator, the hidden danger of cracking of the column insulator has not been fundamentally solved, resulting in quality problems in the parts of the grounding switch products. Impurities are easily caused by cracking to fall to the static side (high-voltage side) of the grounding switch, thereby causing risks such as discharge. In addition, in the prior art, the moving contact seat of the grounding switch is fixedly connected to the conductive bar by bolts, and the conductive bar is then fixedly connected to the central conductive column of the grounding terminal by bolts. The central conductive column extends out of the grounding terminal housing and is then connected to the grounding wire to ground the moving contact. The above grounding method has many assembly links, high assembly complexity, poor stability, and many types of parts, which is high in cost.

[0004] It can be seen that the existing insulating flange used in the grounding switch only plays the role of isolation and sealing in a limited space, has a single function, and cannot meet multiple functional requirements, which is not conducive to the development direction of miniaturization of the grounding switch. Summary of the invention

[0005] The present invention provides an insulating flange to solve the technical problem that the existing insulating flange only plays the role of isolation and sealing in a limited space, has a single function, cannot meet multiple functional requirements, and is not conducive to the development direction of miniaturization of grounding switches.

[0006] In order to achieve the above object, the present invention adopts the following technical contents:

[0007] An insulating flange, applied to a grounding switch, comprises an insulating member;

[0008] A moving side contact seat is embedded in the insulating member;

[0009] One side of the movable side contact seat is connected to a grounding terminal plate, and the grounding terminal plate is arranged through the insulating member;

[0010] A plurality of conductor inserts are cast on the top and bottom surfaces of the insulating member, and the conductor inserts are used to connect the moving side housing and the stationary side housing of the grounding switch;

[0011] Wherein, the movable side contact seat is embedded in the interior of the insulating member by an integral casting method.

[0012] Furthermore, the insulating part is made of epoxy resin; and the moving side contact seat is made of aluminum alloy material.

[0013] Furthermore, a wedge-shaped groove is provided on the movable-side contact seat, and the wedge-shaped groove is tightly fitted with the inner wall of the insulating member.

[0014] Furthermore, a plurality of the conductor inserts are evenly arranged on the top surface and the bottom surface of the insulating component along the circumferential direction of the insulating component; the conductor inserts on the top surface and the conductor inserts on the bottom surface are independently arranged.

[0015] Furthermore, the moving side housing is connected to a grounding terminal plate extending from the moving side contact seat through a short-circuiting copper bar.

[0016] Furthermore, the inner wall of the movable side contact seat is provided with a contact finger mounting groove for fixing the movable side contact finger and a guide member mounting groove for fixing the movable side guide member.

[0017] A grounding switch, characterized by comprising the above-mentioned insulating flange;

[0018] The moving side housing is connected to the stationary side housing through the conductor insert of the insulating flange;

[0019] The moving contact in the moving side housing is arranged through the central hole of the moving side contact seat;

[0020] The movable side contact finger is installed in the movable side contact seat;

[0021] A static side supporting conductor is arranged inside the static side housing;

[0022] A static side contact seat is fixed on the top of the static side supporting conductor, and a static side contact finger is arranged in the static side contact seat;

[0023] One side of the static side supporting conductor is connected to the pot-type insulator.

[0024] Furthermore, a dynamic side sealing ring is provided between the dynamic side housing and the insulating flange; and a static side sealing ring is provided between the static side housing and the insulating flange.

[0025] A working method of a grounding switch, based on the above grounding switch, comprises:

[0026] When opening the switch, the moving contact is driven to move linearly, the moving contact contacts the moving side contact finger, the moving side contact finger contacts the moving contact seat, and the moving contact seat extends out of the insulating flange of the grounding terminal board to directly ground, thereby realizing the direct grounding of the moving contact of the grounding switch;

[0027] When closing the circuit breaker, the moving contact is driven to move linearly and inserted into the static side contact seat, contacting the static side contact finger to realize the closing operation, and then the static side supporting conductor is grounded, and at the same time, the internal conductor of the GIS equipment connected to the grounding switch is grounded through the pot insulator.

[0028] Furthermore, when opening the switch, a short-circuit copper busbar is used to connect the moving side housing and the grounding terminal board extending from the moving side contact seat, so that the moving side housing of the grounding switch is directly grounded.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides an insulating flange, which embeds a moving-side contact seat in the interior of an insulating part by an integrated casting method, and a moving-side contact finger is arranged in the moving-side contact seat to meet the current flow requirement; the moving-side contact seat has a grounding terminal board extending out of the insulating part to meet the direct grounding requirement; the upper and lower surfaces of the insulating part have edge conductor inserts, which can be fixedly connected with the moving-side shell and the static-side shell to meet the support requirement; the insulating flange can simultaneously meet the insulation, sealing, support, current flow and direct grounding requirements of the grounding switch in a limited space, and can simplify the moving-side assembly structure of the grounding switch; the use of the insulating flange can meet multiple functional requirements in a limited space, thereby meeting the development direction of miniaturization of the grounding switch; the structure and principle of the insulating flange are simple, it is easy to make and use, has strong functionality, and has good promotion and application value.

[0031] Preferably, in the present invention, the movable side contact seat is made of aluminum alloy material, whose temperature expansion coefficient is similar to that of the epoxy resin material used in the insulating member, and the casting joint surface is not easy to crack, thereby ensuring the reliability and stability of the insulating flange.

[0032] Preferably, in the present invention, the wedge-shaped groove of the moving-side contact seat and the inner wall of the insulating member are tightly fitted, so that the airtightness of the casting joint surface can be further ensured, the sealing effect is improved, and the risk of air leakage is reduced.

[0033] Preferably, in the present invention, a plurality of conductor inserts are evenly arranged along the circumference of the insulating part and are located on the top and bottom surfaces of the insulating part, thereby improving the uniformity and stability of the connection; and the conductor inserts on the top surface and the conductor inserts on the bottom surface are independently arranged, and the conductor inserts on both surfaces do not penetrate each other, so that the moving side shell or the stationary side shell can be assembled or disassembled separately when necessary; and the assembly and disassembly of the single-side shell is convenient.

[0034] Preferably, in the present invention, a contact finger installation groove and a guide member installation groove are provided on the inner wall of the moving side contact seat. The provision of the guide member installation groove facilitates the installation of the guide member, so that the insulating flange also has the guiding function of the moving contact, further enriching the functionality.

[0035] The present invention also provides a grounding switch, comprising the above-mentioned insulating flange and a static side supporting conductor arranged inside the static side shell, the static side supporting conductor adopts a current-carrying-supporting-shielding integrated structure, and a static side contact seat mounting groove is provided at the upper end of the static side supporting conductor to meet the universal installation requirements of different forms of static side contact finger contact forms; the overall structure of the grounding switch is simple, intensive and compact, with a small number of parts and components and low assembly complexity. It only needs to adjust the length of the moving contact and the size of the moving side transmission structure according to the requirements of the moving side and static side opening distance of products with different voltage levels, so as to unify the structure of grounding switches for GIS equipment of all voltage levels, and realize the standardization and serialization design of grounding switches of all voltage levels of 126kV-1100kV.

[0036] In addition, the static side contact seat and contact fingers can be installed as an integral structure on different supporting conductors to meet the installation requirements of different working conditions of the grounding switch.

[0037] Preferably, in the present invention, a dynamic side sealing ring is provided between the dynamic side housing and the insulating flange; a static side sealing ring is provided between the static side housing and the insulating flange, which can further improve the sealing performance and operational reliability of the overall grounding switch.

[0038] The present invention also provides a working method of a grounding switch, which is based on the above-mentioned grounding switch and specifically includes the opening and closing processes of the grounding switch, wherein the contact and separation with the moving contact and the static side contact finger are realized through the linear movement of the moving contact, and when opening, the moving contact contacts the moving side contact finger, and since the moving side contact finger contacts the moving contact seat, the grounding terminal board of the moving contact seat extending out of the insulating flange is directly grounded, so that the moving contact of the grounding switch is directly grounded, thereby ensuring the reliability of the opening; when closing, the moving contact and the static side contact finger realize the closing operation, and then the static side supporting conductor is grounded, and at the same time, the inner conductor of the GIS equipment connected to the grounding switch is grounded through the basin insulator, thereby ensuring the reliable grounding of each component during the closing process; this working method is simple to operate and easy to implement.

[0039] Preferably, in the present invention, during the opening process, a short-circuit copper busbar is used to connect the moving side housing and the grounding terminal board extending from the moving side contact seat, thereby achieving direct grounding of the moving side housing and further improving the grounding efficiency and safety of the grounding switch. Such operation enables the grounding switch to maintain a good grounding state even in the opening state, thereby preventing safety hazards caused by static electricity accumulation or other reasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of an insulating flange provided in an embodiment of the present invention;

[0041] Figure 2 A top view of an insulating flange provided in an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a grounding switch provided by an embodiment of the present invention;

[0043] Figure 4 A first specific application scenario of a grounding switch provided by an embodiment of the present invention;

[0044] Figure 5 This is a second specific application scenario of a grounding switch provided by an embodiment of the present invention.

[0045] Reference numerals:

[0046] Moving side housing-1, moving side transmission structure-2, moving contact-3, moving side sealing ring-4, moving side contact seat-5, insulating flange-6, short-circuit copper bar-7, moving side contact finger-8, moving side guide 9;

[0047] Pan-type insulator-10, static side housing-11, static side supporting conductor-12, static side contact seat-13, static side contact finger-14, static side sealing ring-15;

[0048] Insulation parts-16, conductor inserts-17, grounding terminal boards-18, grounding switches-19, busbar tees-20, isolating switches-21. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0054] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0055] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Example 1

[0057] As mentioned in the background technology, the existing grounding switch moving side contact seat is connected to the moving side housing of the grounding switch through a mechanical assembly connection method, and then connected to the grounding bar through the moving side housing for grounding or through a grounding plate extending out of the housing for grounding. The grounding assembly links are mostly unreliable and the assembly complexity is high; more importantly, the insulating flange used in the existing grounding switch only plays the function of insulating isolation and sealing between the moving side housing and the static side housing of the grounding switch, and fails to give full play to more functions in a limited space; in addition, the existing grounding switches have diverse structures and complex categories, which do not meet the requirements of product standardization and serialized design; furthermore, the prior art uses other methods to seal the grounding terminal of the grounding switch, which can prevent the grounding switch from leaking due to cracking of the column insulator, but fails to fundamentally solve the hidden danger of cracking of the column insulator, resulting in quality problems in the components of the grounding switch product, which is prone to impurities falling to the static side (high voltage side) of the grounding switch due to cracking, thereby causing discharge and other risks.

[0058] In order to solve the above problems, the present invention provides an insulating flange. The grounding switch has a moving side structure and a static side structure. The moving side has a moving side housing, a transmission structure, a moving contact, an insulating flange driving a side contact seat, a moving side sealing ring, a moving side contact finger and a moving side guide ring. The static side has a static side housing, a static side supporting conductor, a static side contact seat, a static side sealing ring, a static side contact finger and a static side guide. The overall structure is compact and suitable for a full range of high voltage level lines of 126kV-1100kV.

[0059] In order to facilitate understanding of the technical solution provided by this embodiment, the technical terms in this field are explained as follows:

[0060] Earthing switch: A mechanical switching device used in high-voltage switchgear to ground a circuit. Under abnormal conditions (such as short circuit), it can carry a specified abnormal current for a specified time; but under normal circuit conditions, it is not required to carry current.

[0061] Moving side: The side connected to the operating mechanism, the side where the moving contact moves during the opening and closing process of the grounding switch.

[0062] Static side: The side that remains stationary during the opening and closing process of the grounding switch.

[0063] Contact finger: A part that makes sliding contact with the moving contact on the moving side or the static side during the opening and closing process, and serves as an electrical connection.

[0064] Guide parts: Parts used to guide the moving contacts on the moving and static sides during the opening and closing process of the grounding switch.

[0065] Contact seat: The base for installing the contact fingers on the moving and static sides of the grounding switch.

[0066] like Figure 1 As shown, this embodiment provides an insulating flange, the insulating flange 6 adopts an integrated casting process, and the body of the insulating flange is mainly composed of an insulating member 16;

[0067] In this embodiment, the movable contact seat 5 is cast into the insulating member 16 . To ensure the airtightness of the casting joint surface, a wedge-shaped groove is provided on the movable contact seat 5 to fit closely with the inner wall of the cast insulating member 16 .

[0068] In this embodiment, in order to solve the problem of cracking of the bonding surface, the insulating member 16 is made of epoxy resin material; the moving side contact seat 5 is made of aluminum alloy material. The temperature expansion coefficient of the aluminum alloy material is similar to that of the epoxy resin material used in the insulating member 16, and the casting bonding surface is not easy to crack.

[0069] In this embodiment, the movable side contact seat 5 is provided with a movable side contact finger 8 contact finger installation groove and a movable side guide member 9 guide member installation groove, which can meet the guidance and current flow requirements of the movable contact 3 during the opening and closing process.

[0070] In this embodiment, the moving side contact seat 5 extends with a plate-like structure, which extends out from the side of the insulating member 16 to form a grounding terminal plate 18 for directly grounding the moving contact 3, reducing the grounding links, meeting the reliable grounding requirements, and simplifying the moving side assembly structure.

[0071] In this embodiment, a grounding terminal plate 18 extending from the side of the insulating member 16 on the movable side contact seat 5 has a hole for fixedly connecting the short-circuiting copper bar 7 and the grounding bar.

[0072] In this embodiment, Figure 2 As shown, the edge of the insulating member 16 is uniformly cast with conductor inserts 17 along the circumference from the upper and lower surfaces, which are used to be fixedly connected to the moving side housing 1 and the stationary side housing 11 respectively;

[0073] In this embodiment, the upper and lower surface conductor inserts 17 do not penetrate, so that the moving side housing 1 or the stationary side housing 11 can be assembled or disassembled separately when necessary.

[0074] It can be seen that this embodiment provides an insulating flange. The insulating flange 6 as a whole can simultaneously meet the requirements of insulation, sealing, support, current flow, guidance and direct grounding of the grounding switch in a limited space, and can simplify the assembly structure of the moving side of the grounding switch.

[0075] In summary, the insulating flange on the moving side of the grounding switch adopts an integrated casting structure, in which the moving contact seat is made of aluminum alloy material, whose temperature expansion coefficient is similar to that of the epoxy resin material used in the insulating part, and the joint surface is not easy to crack. The joint surface between the moving contact seat and the insulating part has a wedge-shaped structure, which can further ensure the sealing of the joint surface and reduce the risk of air leakage; the moving contact seat has a moving side contact finger installation groove and a moving side guide installation groove, which cooperate with the moving side contact finger and the moving side guide to meet the flow and guidance requirements; the moving side contact seat has a grounding terminal board extending out of the insulating part to meet the direct grounding requirements; the upper and lower surfaces of the insulating part have edge conductor inserts, which can be fixedly connected to the moving side shell and the static side shell to meet the support requirements. It can be seen that the insulating flange can simultaneously meet the insulation, sealing, support, flow, guidance and direct grounding requirements of the grounding switch in a limited space, and can simplify the assembly structure of the moving side of the grounding switch. The insulating flange can meet multiple functional requirements in a limited space, thereby meeting the development direction of miniaturization of the grounding switch.

[0076] Example 2

[0077] like Figure 3 As shown, this embodiment provides a grounding switch with a simple structure and low assembly complexity. It is only necessary to adjust the length of the moving contact 3 and the size of the moving side transmission structure 2 according to the requirements of the moving side and the static side opening distance of products of different voltage levels, so as to achieve the standardization and serialization design of grounding switches of the full range of voltage levels of 126kV-1100kV; Figure 4 and Figure 5 As shown, the grounding switch 19 can be applied to the busbar tee 20 and the isolating switch 21, and plays a good grounding protection role.

[0078] The present embodiment provides a grounding switch, including the insulating flange mentioned in Embodiment 1, and the specific structure includes two parts, a moving side and a static side, wherein the moving side structure includes a moving side housing 1, a moving side transmission structure 2, a moving contact 3, a moving side sealing ring 4, an insulating flange 6 driving a side contact seat 5, a short-circuiting copper bar 7, a moving side contact finger 8 and a moving side guide 9; the static side structure includes a pot insulator 10, a static side housing 11, a static side supporting conductor 12, a static side contact seat 13, a static side contact finger 14, and a static side sealing ring 15.

[0079] In this embodiment, the lower flange surface of the moving side housing 1 of the grounding switch 19 is bolted to the insulating flange 6 through an edge conductor insert 17, and a moving side sealing ring 4 is provided between the lower flange surface of the moving side housing 1 and the upper flange surface of the insulating flange 6 to meet the sealing requirements of the moving side housing.

[0080] In this embodiment, the moving contact 3 passes through the central hole of the moving-side contact seat 5 in the insulating flange 6 , and the moving-side guide member 9 controls the centering of the moving contact 3 , and the moving contact 3 contacts the moving-side contact finger 8 .

[0081] In this embodiment, the upper flange surface of the static side shell 11 of the grounding switch is bolted to the insulating flange 6 through an edge conductor insert 17, and a static side sealing ring 15 is arranged between the upper flange surface of the static side shell 11 and the lower flange surface of the insulating flange 6 to meet the sealing requirements of the static side shell 11.

[0082] In this embodiment, the static side supporting conductor 12 is fixedly connected to the pot-type insulator 10 , a static side contact seat 13 is installed in the upper end groove of the static side supporting conductor 12 , and a static side contact finger 14 is installed in the static side contact seat 13 .

[0083] In this embodiment, the transmission structure 2 on the moving side can be realized by a crank arm linkage transmission, or by a gear rack transmission structure.

[0084] In this embodiment, the moving side contact finger 8 and the stationary side contact finger 14 can be realized by structures such as spring contact fingers, strap contact fingers, contact finger grids, and self-powered contacts.

[0085] This embodiment provides a grounding switch, and the specific working principle is as follows:

[0086] The grounding switch drives the moving contact 3 to move up and down in a straight line through the moving side transmission structure 2, thereby realizing the opening and closing operation of the grounding switch. When opening, the moving contact 3 of the grounding switch contacts with the moving side contact finger 8, and the moving side contact finger 8 contacts with the moving side contact seat 5. The grounding terminal board of the moving side contact seat 5 extending from the insulating flange 6 can be directly grounded, thereby meeting the direct grounding requirement of the moving contact 3 of the grounding switch; in addition, the short-circuit copper bar 7 connects the moving side housing 1 and the grounding terminal board extending from the moving side contact seat 5, thereby meeting the grounding requirement of the moving side housing 1 of the grounding switch. When closing, the moving contact 3 of the grounding switch moves downward under the drive of the transmission structure 2 and inserts into the static side contact seat 13, and contacts with the static side contact finger 14, thereby realizing the closing operation of the grounding switch, and then grounding the static side supporting conductor of the grounding switch, and indirectly grounding the internal conductor of the GIS equipment connected to the grounding switch through the central insert conductor of the basin insulator 10.

[0087] It can be seen that the static side supporting conductor 12 of the grounding switch adopts a current-supporting-shielding integrated structure, the left end can be fixedly connected to the pot-type insulator 10, and the upper end is provided with a static side contact seat 13 mounting groove, which is suitable for the universal installation of various static side contact fingers 14.

[0088] The static side contact seat 13 and the supporting conductor 12 of the grounding switch adopt an assembly structure. The static side contact seat 13 has a mounting groove for the static side contact finger 14. The static side contact seat 13 and the static side contact finger 14 can be used as an integral structure and can be installed on different supporting conductors to meet different installation conditions of the grounding switch.

[0089] There is a static side contact seat installation groove on the upper end of the static side supporting conductor of the grounding switch to meet the universal installation requirements of different forms of static side contact finger contact forms;

[0090] In addition, the static side contact seat and contact fingers can be installed as an integral structure on different supporting conductors to meet the installation requirements of different working conditions of the grounding switch.

[0091] In addition, the overall structure of the grounding switch is simple, compact, with few types of parts and low assembly complexity. It only needs to adjust the length of the moving contact 3 and the size of the moving side transmission structure 2 according to the requirements of the moving side and static side opening distance of products of different voltage levels, so as to unify the structure of the grounding switch for GIS equipment of all voltage levels and realize the standardization and serial design of grounding switches of all voltage levels of 126kV-1100kV.

[0092] The present invention provides an insulating flange and a grounding switch. The key points of the technical solution are:

[0093] First, the insulating flange adopts an integrated casting structure, which can simultaneously meet the requirements of insulation, sealing, support, current flow, guidance and direct grounding of the grounding switch in a limited space, and can simplify the assembly structure of the moving side of the grounding switch.

[0094] Second, the static contact seat installation groove on the upper end of the static side supporting conductor can meet the universal installation requirements of different forms of static side contact finger contact forms.

[0095] Third, the static side contact seat and contact finger can be used as a finishing structure and installed on different supporting conductors to meet the installation requirements of different working conditions of the grounding switch.

[0096] Fourth, the overall structure of the grounding switch is simple, compact, with few types of parts and low assembly complexity. It can unify the structure of grounding switches for GIS equipment of all voltage levels and realize the standardization and serialization design of grounding switches of all voltage levels from 126kV to 1100kV.

[0097] The present invention provides an insulating flange, which has the following advantages over traditional insulating flanges:

[0098] This insulating flange uses an insulating part made of epoxy resin, with a moving side contact seat made of aluminum alloy embedded inside, and the structural stability and insulation performance are enhanced by an integrated casting method. The moving side contact seat and the grounding terminal board are set up in an integrated structure, which is convenient for direct grounding. At the same time, the conductor inserts evenly distributed on the upper and lower surfaces of the insulating part effectively connect the moving side shell and the static side shell of the grounding switch, which improves the overall connection stability and facilitates the separate disassembly of the moving and static side structures. In addition, the moving side contact seat is designed with a finger installation groove and a guide installation groove inside, which is convenient for installing and fixing the finger and guide. This insulating flange is applied to the grounding switch, combined with the design of the moving side sealing ring and the static side sealing ring, to further enhance the sealing performance and operation safety. During the operation of the grounding switch, the opening and closing operations are realized by controlling the linear motion of the moving contact, ensuring the effective grounding of the grounding switch and the GIS equipment connected to it under different working conditions, and improving the operation efficiency and safety of the power system. At the same time, a short-circuited copper bar is used to connect the moving side shell and the grounding terminal board during the opening, realizing the direct grounding of the moving side shell, further enhancing the grounding effect.

[0099] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. An insulating flange, characterized in that: Applicable to an earthing switch, comprising an insulating member (16); A moving-side contact seat (5) is embedded inside the insulating member (16); One side of the movable side contact seat (5) is connected to a grounding terminal plate (18), and the grounding terminal plate is arranged to pass through the insulating member (16); A plurality of conductor inserts (17) are cast on the top and bottom surfaces of the insulating member (16), and the conductor inserts (17) are used to connect the moving side housing (1) and the stationary side housing (11) of the grounding switch; The movable side contact seat (5) is embedded in the interior of the insulating member (16) by an integral casting method.

2. The insulating flange according to claim 1, characterized in that: The insulating member (16) is made of epoxy resin; and the movable side contact seat (5) is made of aluminum alloy material.

3. The insulating flange according to claim 1, characterized in that: The movable side contact seat (5) is provided with a wedge-shaped groove, and the wedge-shaped groove is tightly fitted with the inner wall of the insulating member (16).

4. An insulating flange according to any one of claims 1 to 3, characterized in that: A plurality of the conductor inserts (17) are evenly arranged on the top and bottom surfaces of the insulating member (16) along the circumference of the insulating member (16); the conductor inserts (17) on the top surface and the conductor inserts (17) on the bottom surface are independently arranged.

5. The insulating flange according to claim 1, characterized in that: The moving side housing (1) is connected to a grounding terminal plate (18) extending from the moving side contact seat (5) via a short-circuiting copper bar (7).

6. The insulating flange according to claim 1, characterized in that: The inner wall of the movable side contact seat (5) is provided with a contact finger mounting groove for fixing the movable side contact finger (8) and a guide member mounting groove for fixing the movable side guide member (9).

7. A grounding switch, characterized in that: Comprising the insulating flange (6) according to any one of claims 1 to 6; The moving side housing (1) is connected to the stationary side housing (11) via a conductor insert (17) of the insulating flange (6); The moving contact (3) in the moving side housing (1) is arranged through the central hole of the moving side contact seat (5); A moving side contact finger (8) is installed in the moving side contact seat (5); A static side supporting conductor (12) is arranged inside the static side housing (11); A static side contact seat (13) is fixed on the top of the static side supporting conductor (12), and a static side contact finger (14) is arranged in the static side contact seat (13); One side of the static side supporting conductor (12) is connected to the pot-type insulator (10).

8. The grounding switch according to claim 7, characterized in that: A dynamic side sealing ring (4) is provided between the dynamic side housing (1) and the insulating flange (6); and a static side sealing ring (15) is provided between the static side housing (11) and the insulating flange (6).

9. A method for operating a grounding switch, characterized in that: The grounding switch according to claim 7 or 8 comprises: When the switch is opened, the moving contact (3) is driven to move linearly, the moving contact (3) contacts the moving side contact finger (8), the moving side contact finger (8) contacts the moving contact seat (5), and the moving contact seat (5) extends out of the insulating flange (6) and is directly grounded, thereby achieving direct grounding of the moving contact (3) of the grounding switch; When closing the switch, the moving contact (3) is driven to move linearly and inserted into the static side contact seat (13), and contacts the static side contact finger (14) to realize the closing operation, and then the static side supporting conductor (12) is grounded, and at the same time, the internal conductor of the GIS equipment connected to the grounding switch is grounded through the pot insulator (10).

10. A working method of a grounding switch according to claim 9, characterized in that: When opening the switch, a short-circuit copper bar (7) is used to connect the moving side housing (1) and the grounding terminal plate (18) extending from the moving side contact seat (5), thereby achieving direct grounding of the moving side housing (1) of the grounding switch.

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