Rapid bus connector for gas insulated switchgear

Abstract

One end of a connecting seat is provided with a plugging inner edge, the other end of the connecting seat is provided with a sealing outer edge, the center of the plugging inner edge is provided with a guide row in a penetrating and sealing manner, the outer end surface of the sealing outer edge is provided with an air chamber sealing plate in an attached manner, and the outer side surface of the sealing outer edge is connected with the outer side surface of the inflatable cabinet in a sealing manner. The gas guide cabinet comprises two symmetrical connecting seats, an insulating sleeve is arranged between the two symmetrical connecting seats in a plug-in mode, a connecting conductor is arranged on the inner side of the insulating sleeve in a plug-in mode, and a guide bar is arranged on the inner side of the end of the connecting conductor in a plug-in mode. Therefore, the inflation and leak detection work of the inflatable cabinet can be completed in a factory, inflation operation is not needed on site, the on-site installation work of the inflatable cabinet is greatly simplified, the work efficiency of on-site installation is greatly improved, and the inflatable cabinet is not influenced by external environmental factors.

Description

Technical Field

[0001] This article belongs to the technical field of busbar connection for gas-insulated switchgear, specifically relating to a quick busbar connector for gas-insulated switchgear. Background Technology

[0002] Gas-insulated switchgear is a new generation of switchgear. The main switch can be either a permanent magnet vacuum circuit breaker or a spring mechanism vacuum circuit breaker. The entire cabinet combines air insulation with sulfur hexafluoride gas compartments, making it both compact and expandable. It features compact structure, flexible operation, and reliable interlocking, and is widely used in small secondary substations, switching stations, prefabricated substations, residential communities, industrial and mining enterprises, large shopping malls, and other occasions in power systems.

[0003] The insulating medium of gas-insulated switchgear is primarily SF6, N2, dry air, or a mixture of SF6 and N2. However, traditional gas-insulated switchgear busbar connections require opening the gas chamber, on-site installation, vacuuming, and filling with insulating medium. Completing all these steps on-site takes a long time, and gas is prone to leakage, affecting the environment. Utility Model Content

[0004] To address the aforementioned issues, this paper proposes a busbar quick connector for gas-insulated switchgear. The connector includes a connector base, an insulating sleeve, a connecting conductor, and a guide rail. The connector base is a cap-shaped shell, with its outer side inserted into and sealed to the gas-insulated switchgear. One end of the connector base has an inner insertion edge, and the other end has a sealing outer edge. The connector bases are arranged symmetrically in pairs, with the sealing outer edge as the surface. A guide rail is sealed through the center of the inner insertion edge. A gas chamber sealing plate is fitted to the outer surface of the sealing outer edge, and the outer surface of the sealing outer edge is sealed to the outer surface of the gas-insulated switchgear. The two symmetrical connector bases are connected... The internal plug-in type is equipped with an insulating sleeve, and the inner side of the insulating sleeve is equipped with a connecting conductor. The middle outer side of the insulating sleeve is equipped with a semi-conductive layer parallel and symmetrically arranged. The semi-conductive layer is fitted and connected to the inner diameter of the sealing outer edge and the inner diameter of the gas chamber sealing plate. The end of the connecting conductor is equipped with a guide busbar plug-in type. By pre-sealing and installing a connecting seat and guide busbar into the gas cabinet, the gas filling and leak detection of the gas cabinet can be completed in the factory. There is no need to carry out gas filling operations on site, which greatly simplifies the on-site installation of the gas cabinet, greatly improves the efficiency of on-site installation, and is not affected by external environmental factors.

[0005] The connector is an integrated cap-shaped housing. The outer annular surface of the connector has a sloping outer surface, and the outer corners of the connector have rounded chamfers. The outer side of the large-diameter end face of the connector has a sealing outer edge, and the inner side of the small-diameter end face of the connector has an insertion inner edge. The center of the insertion inner edge has a sealing insertion hole, and the inner surface of the sealing insertion hole is sealed to the outer surface of the conductor. The inner annular surface of the sealing outer edge has a semi-circular convex surface, which is in close contact with the semi-conductive layer. Through the cap-shaped housing connector, the conductor can be easily and sealed before being inserted, and then the connector can be installed on the surface of the gas-insulating cabinet. Thus, the connector can be pre-installed and sealed during the production process of the gas-insulating cabinet. When connection is required, the insulating sleeve and connecting conductor can be inserted, and then the connector and conductor at the other end can be plugged in to achieve a sealed wiring connection.

[0006] The guide bar is cylindrical in shape. One end of the guide bar has a connecting surface on its outer side, and the other end of the guide bar has two sets of spring grooves arranged in a parallel ring on its outer side. The connecting surface has vertically collinear guide holes. The inner side of the spring groove has spring contacts, which are fixedly connected to the inner side of the connecting conductor. The connection between the guide bar and the connecting conductor is ensured to be stable through the spring contacts on the inner side of the guide bar.

[0007] The insulating sleeve is shaped like a hollow spindle tube. Two sealing grooves are symmetrically arranged in a ring on the outer side of the middle part of the insulating sleeve. A semi-conductive layer is provided on the inner surface of the sealing groove. The outer surface of the semi-conductive layer is in close contact with the inner diameter of the sealing outer edge and the inner diameter of the air chamber sealing plate. By providing sealing grooves on the outside of the insulating sleeve and providing a semi-conductive layer inside the sealing grooves, the sealing performance of the sealing outer edge and the air chamber sealing plate can be guaranteed.

[0008] The length of the connecting conductor is the same as the length of the insulating sleeve. The end face of the connecting conductor is flush with the end face of the insulating sleeve. Both the end face of the connecting conductor and the end face of the insulating sleeve are in close contact with the inner end face of the connecting seat. The connecting conductor ensures that the conductors are interconnected after the connecting seats at both ends are installed and fixed.

[0009] The air chamber sealing plate is annular stepped plate made of stainless steel. The outer surface of the air chamber sealing plate has protruding steps, and the inner diameter of the air chamber sealing plate has a semi-arc convex surface. The semi-arc convex surface is attached to the semi-conductive layer. The air chamber sealing plate ensures the absolute airtightness of the sealing outer edge of the connector and prevents insufficient airtightness when the connector is connected to the surface of the gas cabinet.

[0010] Beneficial effects:

[0011] By pre-installing a connector and guide rail into the gas cabinet in a sealed manner, the inflation and leak detection of the gas cabinet can be completed in the factory, eliminating the need for on-site inflation work. This greatly simplifies the on-site installation of the gas cabinet, significantly improves on-site installation efficiency, and is unaffected by external environmental factors.

[0012] The connector with the cap-shaped housing allows for easy, sealed insertion of the conductor before installing the connector onto the surface of the gas-insulated switchgear. This allows the connector to be pre-installed and sealed during the production of the gas-insulated switchgear. When connection is required, the insulating sleeve and connecting conductor can be inserted, and then the connector and conductor at the other end can be plugged in to achieve a sealed wiring connection.

[0013] The spring contacts on the inside of the guide bar ensure a stable connection between the guide bar and the connecting conductor.

[0014] By providing a sealing groove on the outside of the insulating sleeve and a semi-conductive layer inside the sealing groove, the sealing performance of the outer sealing edge and the gas chamber sealing plate can be guaranteed.

[0015] By connecting the conductors, it is possible to ensure that the conductors are interconnected after the connectors at both ends are installed and fixed.

[0016] The air chamber sealing plate ensures the absolute airtightness of the outer sealing edge of the connector, preventing insufficient airtightness when the connector is connected to the surface of the gas chamber. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a busbar quick connector for a gas-insulated switchgear;

[0018] Figure 2 This is a cross-sectional view of a busbar quick connector for a gas-insulated switchgear;

[0019] In the diagram: 1. Connecting seat, 2. Insulating sleeve, 3. Connecting conductor, 4. Gas chamber sealing plate, 5. Conductor bar, 6. Semi-conductive layer, 7. Spring contact finger. Detailed Implementation

[0020] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0021] 1. Connector 2. Insulating sleeve 3. Connecting conductor 4. Gas chamber sealing plate 5. Conductor bar 6. Semi-conductive layer 7. Spring contact finger.

[0022] like Figure 1 , 2 As shown;

[0023] A busbar quick connector for a gas-insulated switchgear includes a connector 1, an insulating sleeve 2, a connecting conductor 3, and a guide rail 5. The connector 1 is a cap-shaped shell, and its outer side is inserted into and sealed to the gas-insulated switchgear. One end of the connector 1 has an inner insertion edge, and the other end has a sealing outer edge. The connector 1s are arranged symmetrically in pairs with the sealing outer edge as the surface. The guide rail 5 is sealed through the center of the inner insertion edge. An air chamber sealing plate 4 is attached to the outer surface of the sealing outer edge, and the outer surface of the sealing outer edge is sealed to the outer surface of the gas-insulated switchgear. The two symmetrical connector 1s are connected internally by a plug-in mechanism. An insulating sleeve 2 is provided, with a connecting conductor 3 inserted into the inner side of the insulating sleeve 2. A semi-conductive layer 6 is symmetrically arranged parallel to the outer side of the middle portion of the insulating sleeve 2. The semi-conductive layer 6 is fitted and connected to the inner diameter of the sealing outer edge and the inner diameter of the air chamber sealing plate 4. A guide bar 5 is inserted into the inner side of the end of the connecting conductor 3. The connecting seat 1 is an integral cap-shaped shell. The outer annular surface of the connecting seat 1 has a sloped outer surface. All outer corners of the connecting seat 1 have rounded chamfers. The outer side of the large-diameter end face of the connecting seat 1 has a sealing outer edge, and the inner side of the small-diameter end face of the connecting seat 1 has an insertion inner edge. A sealing insertion hole is located at the center of the insertion inner edge. The inner surface of the hole is sealed and connected to the outer surface of the guide 5. The inner ring of the sealing outer edge has a semi-circular convex surface, which is in close contact with the semi-conductive layer 6. The guide 5 is cylindrical in shape. One end of the guide 5 has a connecting cut surface, and the other end of the guide 5 has two sets of spring grooves arranged in a parallel ring. The spring contact finger 7 is fixedly connected to the inner side of the connecting conductor 3. The surface of the connecting cut surface has a guide hole arranged vertically and collinearly. The inner side of the spring groove has the spring contact finger 7. The insulating sleeve 2 is hollow like a spindle. The middle outer side of the insulating sleeve 2 has two symmetrical sealing grooves arranged in a ring. The inner surface of the groove is provided with a semi-conductive layer 6. The outer surface of the semi-conductive layer 6 is in contact with the inner diameter of the sealing outer edge and the inner diameter of the air chamber sealing plate 4. The length of the connecting conductor 3 is the same as the length of the insulating sleeve 2. The end face of the connecting conductor 3 is flush with the end face of the insulating sleeve 2. The end face of the connecting conductor 3 and the end face of the insulating sleeve 2 are both in contact with the inner end face of the connecting seat 1. The air chamber sealing plate 4 is an annular stepped plate. The material of the air chamber sealing plate 4 is stainless steel. The outer surface of the air chamber sealing plate 4 is provided with a protruding step. The inner diameter of the air chamber sealing plate 4 is provided with a semi-arc convex surface. The semi-arc convex surface is in contact with the semi-conductive layer 6.

[0024] Implementation example;

[0025] The connecting seat 1 is pre-installed on the side surface of the gas-filled cabinet in the factory to ensure the connection, insulation, and sealing of the connecting seat 1. The connecting seat 1 is sent to the site along with the gas-filled cabinet. The spring contact finger 7, insulating sleeve 2, connecting conductor 3, and gas chamber sealing plate 4 are sent to the site separately. During the on-site assembly, after the first cabinet is in place, the inside of the connecting seat 1 is cleaned, the spring contact finger 7 is installed on the outside of the guide rail 5, and then the insulating sleeve 2 and connecting conductor 3 are inserted. Afterwards, the spring contact finger 7 is installed inside the connecting seat 1 on the second cabinet that needs to be assembled. According to the assembly process, the cabinets are moved for assembly, which makes the assembly easy, quick, safe and environmentally friendly on-site assembly. There are no exposed conductors, and it is not affected by external environmental factors, ensuring the safe and stable performance of power transmission.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A busbar quick connector for a gas-insulated switchgear, the connector comprising a connector base, an insulating sleeve, a connecting conductor, and a conductor bar, characterized in that, The connecting seat is shaped like a cap. The outer side of the connecting seat is inserted and sealed to the gas chamber. One end of the connecting seat has an inner edge for insertion, and the other end has an outer edge for sealing. The connecting seats are arranged in pairs symmetrically with the outer edge for sealing. A guide bar is provided through the center of the inner edge for sealing. A gas chamber sealing plate is attached to the outer surface of the outer edge for sealing. The outer surface of the outer edge for sealing is sealed to the outer surface of the gas chamber. An insulating sleeve is inserted between the two symmetrical connecting seats. A connecting conductor is inserted inside the insulating sleeve. A semi-conductive layer is arranged parallel and symmetrically on the outer side of the middle part of the insulating sleeve. The semi-conductive layer is attached to the inner diameter of the outer edge for sealing and the inner diameter of the gas chamber sealing plate. A guide bar is inserted inside the end of the connecting conductor.

2. The busbar quick connector for a gas-insulated switchgear according to claim 1, characterized in that, The connector is an integral cap-shaped housing. The outer annular surface of the connector has a sloping outer surface. The outer corners of the connector have rounded chamfers. The outer side of the large-diameter end face of the connector has a sealing outer edge. The inner side of the small-diameter end face of the connector has an insertion inner edge. The center of the insertion inner edge has a sealing insertion hole. The inner surface of the sealing insertion hole is sealed and connected to the outer surface of the conductor. The inner annular surface of the sealing outer edge has a semi-circular convex surface. The semi-circular convex surface is bonded and connected to the semi-conductive layer.

3. The busbar quick connector for a gas-insulated switchgear according to claim 1, characterized in that, The guide bar is cylindrical in shape. One end of the guide bar has a connecting surface on its outer side, and the other end of the guide bar has two sets of spring grooves arranged in a parallel ring on its outer side. The surface of the connecting surface has vertically collinear connecting holes. The inner side of the spring groove has spring contacts, which are fixedly connected to the inner side of the connecting conductor.

4. A busbar quick connector for a gas-insulated switchgear according to claim 1, characterized in that, The insulating sleeve is shaped like a hollow spindle tube. Two sealing grooves are symmetrically arranged in an annular shape on the outer side of the middle part of the insulating sleeve. A semi-conductive layer is provided on the inner surface of the sealing groove. The outer surface of the semi-conductive layer is in close contact with the inner diameter of the sealing outer edge and the inner diameter of the air chamber sealing plate.

5. A busbar quick connector for a gas-insulated switchgear according to claim 1, characterized in that, The length of the connecting conductor is the same as the length of the insulating sleeve, the end face of the connecting conductor is flush with the end face of the insulating sleeve, and the end faces of the connecting conductor and the insulating sleeve are both in close contact with the inner end face of the connecting seat.

6. A busbar quick connector for a gas-insulated switchgear according to claim 1, characterized in that, The air chamber sealing plate is annular stepped plate, made of stainless steel. The outer surface of the air chamber sealing plate has protruding steps, and the inner diameter of the air chamber sealing plate has a semi-arc convex surface, which is bonded and connected to the semi-conductive layer.

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