A multi-cable gas tank assembly of an environmentally friendly gas insulated switchgear

Abstract

The utility model discloses a kind of multi-cable gas tank assemblies of environmental protection gas insulated cabinet, including the intercommunication cable gas tank and circuit breaker gas tank, the cable gas tank is provided with support bus and multiple cable bushings, the multiple cable bushings are respectively installed on the first side wall of the cable gas tank and are arranged side by side, cable is arranged in each cable bushing, one end of multiple cables extends to the outside of the cable gas tank, the other end is located in cable gas tank and is connected by conducting bar, the conducting bar is parallel with the first side wall;The one end of the support bus is connected with the conducting bar, and the other end extends into the circuit breaker gas tank;The circuit breaker gas tank is cylindrical, and the support bus is coaxially arranged with the circuit breaker gas tank.The utility model has excellent insulation performance, and component arrangement is reasonable, effectively reduce the size of gas tank and its installation time, reduce material cost and production cost.

Description

Technical Field

[0001] This utility model relates to the field of switchgear applications, and in particular to a multi-cable gas box assembly for an environmentally friendly gas-insulated switchgear. Background Technology

[0002] Gas-insulated switchgear (GIS) is widely used in power systems for the control and protection of high-voltage circuits. Environmentally friendly gas-insulated switchgear, as a type of gas-insulated switchgear, has its core components (circuit breakers, disconnectors, busbars, etc.) sealed within a metal casing filled with insulating gas. The components are compactly arranged, resulting in an overall size significantly smaller than that of air-insulated switchgear of equivalent capacity. To ensure the insulation performance of the gas-insulated switchgear, sufficient air clearance is required between the components to guarantee insulation strength. However, existing multi-cable gas boxes have inadequate component arrangement and insulation coordination, leading to increased requirements for larger cable gas boxes, increased use of stainless steel, and higher manufacturing costs. Furthermore, the large cable gas box size directly reduces the space available for cable installation outside the switchgear, limiting cable overlap height and making on-site cable installation difficult. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a multi-cable gas box assembly for an environmentally friendly gas insulation cabinet. It has excellent insulation performance and reasonable component arrangement, effectively reducing the size of the gas box and its installation time, as well as reducing material and production costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a multi-cable gas box assembly for an environmentally friendly gas insulation cabinet, including a cable gas box and a circuit breaker gas box that are interconnected. The cable gas box is provided with a support busbar and multiple cable sleeves. The multiple cable sleeves are respectively installed on the first side wall of the cable gas box and arranged in parallel. Each cable sleeve contains a cable. One end of the multiple cables extends out of the cable gas box, and the other end is located inside the cable gas box and connected by a conductive busbar. The conductive busbar is arranged parallel to the first side wall. One end of the support busbar is connected to the conductive busbar, and the other end extends into the circuit breaker gas box. The circuit breaker gas box is cylindrical, and the support busbar is coaxially arranged with the circuit breaker gas box.

[0005] Furthermore, the circuit breaker gas box is installed on the outer side of the second side wall of the cable gas box, and the second side wall is disposed opposite to the first side wall.

[0006] Furthermore, a current transformer is installed outside the circuit breaker gas box.

[0007] Furthermore, the outer sleeve of the support busbar is provided with an insulating layer.

[0008] Furthermore, the conductive busbar is covered with an insulating layer.

[0009] Furthermore, the cable sleeve has two inlets and one outlet, the cable has two input ends and one output end, the cable sleeve is fitted over the cable, the two input ends extend from the two inlets and extend to the outside of the cable air box, and the output end extends from the outlet and connects to the conductive busbar.

[0010] Furthermore, the cable sleeve has one side with two inlets fixedly connected to the first sidewall, and the first sidewall has an opening through which the two input ends can pass.

[0011] Furthermore, there are multiple cable gas boxes and multiple circuit breaker gas boxes, with multiple cable gas boxes arranged side by side and adjacent cable gas boxes fixedly connected; multiple circuit breaker gas boxes are respectively connected to multiple cable gas boxes in a one-to-one correspondence, and multiple circuit breaker gas boxes are all located on the same side of multiple cable gas boxes.

[0012] Furthermore, the parallel arrangement direction of the plurality of cable sleeves is perpendicular to the parallel arrangement direction of the plurality of cable gas boxes.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model arranges multiple cable conduits side by side, with the other ends of the multiple cables connected by conductive busbars. The supporting busbar is connected to the conductive busbars and coaxial with the circuit breaker gas box. Through reasonable component arrangement, the size of the cable gas box is reduced, material and production costs are reduced, and the cable overlap height and external cable installation space of the switch cabinet are increased, facilitating on-site cable installation. At the same time, the conductive busbars and cable gas boxes form parallel plate-plate electrodes, and the supporting busbars and circuit breaker gas boxes form coaxial cylindrical electrodes. This promotes a more uniform distribution of charge on the electrode surface, thereby maximizing the electric field distribution inside the multi-cable gas box assembly to be a slightly non-uniform electric field, reducing the occurrence of partial discharge, lowering the risk of breakdown, and improving insulation performance.

[0015] 2. This utility model adjusts the current transformer to the outside of the circuit breaker gas box, further reducing the size of the cable gas box and improving the overall structural compactness. At the same time, the installation method is simple, effectively reducing installation time and facilitating the installation and maintenance of the current transformer.

[0016] 3. Insulation layers are installed on the outside of the supporting busbar and the conductor bar to form composite insulation, which further improves the insulation performance, makes the insulation medium an environmentally friendly gas, and meets the insulation level requirements of 40.5kV switchgear under slightly positive pressure conditions.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the multi-cable gas box assembly of the environmentally friendly gas insulation cabinet of the present invention is not limited to the embodiments. Attached Figure Description

[0018] Figure 1 This is the front view of the utility model (perspective of the internal structure of the cable gas box).

[0019] Figure 2 This is a top view of the present invention;

[0020] In the diagram: 1. Cable gas box; 11. First side wall; 12. Second side wall; 2. Circuit breaker gas box; 3. Cable sleeve; 4. Cable; 41. Input end; 42. Output end; 5. Conductor busbar; 51 / 61. Insulation layer; 6. Support busbar; 7. Current transformer; 8. Cable gas box sealing plate. Detailed Implementation

[0021] In this utility model, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "top," and "bottom" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" refers to two or more. In the description of this utility model, unless otherwise explicitly specified and limited, terms such as "installed," "equipped with," "sleeved / connected," and "connected" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1 , Figure 2As shown, this utility model discloses a multi-cable gas box assembly for an environmentally friendly gas-insulated cabinet, comprising a cable gas box 1 and a circuit breaker gas box 2 that are interconnected. The cable gas box 1 contains a support busbar 6 and multiple cable sleeves 3. The multiple cable sleeves 3 are respectively installed on the first sidewall 11 of the cable gas box 1 and arranged side-by-side. Each cable sleeve 3 contains a cable 4, with one end of each cable 4 extending outside the cable gas box 1 and the other end located inside the cable gas box 1 and connected via a conductive busbar 5. The conductive busbar 5 is arranged parallel to the first sidewall 11. One end of the support busbar 6 is connected to the conductive busbar 5, and the other end extends into the circuit breaker gas box 2. The circuit breaker gas box 2 is cylindrical, and the support busbar 6 is coaxially arranged with the circuit breaker gas box 2. Specifically, the cable gas box 1 and the circuit breaker gas box 2 are made of stainless steel, and both contain an insulating medium, which is dry air.

[0024] The circuit breaker gas box 2 is installed on the outer side of the second side wall 12 of the cable gas box 1, and the second side wall 12 is arranged opposite to the first side wall 11. A current transformer 7 is fitted on the outside of the circuit breaker gas box 2, so that the current transformer 7 is adjusted to the outside of the circuit breaker gas box 2, further reducing the size of the cable gas box 1. The overall size of the multi-cable gas box assembly is only 1300x475x390mm. At the same time, the installation method is simple, effectively reducing the installation time and facilitating the installation and maintenance of the current transformer 7.

[0025] The supporting busbar 6 is covered with an insulating layer 61, and the conductive busbar 5 is covered with an insulating layer 51, which can further improve the insulation performance and avoid faults caused by poor insulation. Specifically, the conductive busbar 5 is made of copper, but it is not limited to this. In other embodiments, the conductive busbar 5 can also be made of other conductive materials.

[0026] The cable sleeve 3 has two inlets and one outlet. The cable 4 has two input ends 41 and one output end 42. The cable sleeve 3 is fitted over the cable 4. The two input ends 41 extend from the two inlets and extend to the outside of the cable air box 1. The output end 42 extends from the outlet and connects to the conductive busbar 5. One side of the cable sleeve 3 with the two inlets is fixedly connected to the first sidewall 11, and the first sidewall 11 has an opening through which the two input ends 41 can pass.

[0027] The cable gas boxes 1 and circuit breaker gas boxes 2 are each multiple, with multiple cable gas boxes 1 arranged side by side and adjacent cable gas boxes 1 being fixedly connected. Multiple circuit breaker gas boxes 2 are connected to multiple cable gas boxes 1 in a one-to-one correspondence, and all multiple circuit breaker gas boxes 2 are located on the same side of multiple cable gas boxes 1. The parallel arrangement direction of the multiple cable sleeves 3 is perpendicular to the parallel arrangement direction of the multiple cable gas boxes 1.

[0028] Specifically, there are three cable gas boxes 1 and three circuit breaker gas boxes 2, and two cable sleeves 3. The two cable sleeves 3 are arranged in a front-to-back direction, and the three cable gas boxes are arranged in a left-to-right direction. The cable gas boxes 1 on both sides are also equipped with cable gas box sealing plates 8 to facilitate their installation in switch cabinets, etc. It should be noted that... Figure 1 , Figure 2 The complete structure of the multi-cable gas box assembly is not shown. To facilitate the display of the circuit breaker gas box 2 structure, the current transformer 7 on the middle circuit breaker gas box 2 is hidden. To facilitate the display of the internal structure of the supporting busbar 6 and the cable gas box 1, the second side wall 12 of the circuit breaker gas box 2, the current transformer 7 and the cable gas box 1 on the right side is hidden.

[0029] This utility model discloses a multi-cable gas box assembly for an environmentally friendly gas-insulated switchgear. Multiple cable sleeves 3 are arranged side-by-side, and the other ends of multiple cables 4 are connected via conductive busbars 5. A supporting busbar 6 is connected to the conductive busbar 5 and coaxial with the circuit breaker gas box 2. This rational component arrangement reduces the size of the cable gas box 1, lowering material and production costs. It also increases cable overlap height and external cable installation space within the switchgear, facilitating on-site cable installation. Furthermore, the conductive busbar 5 and the cable gas box 1 form parallel plate-plate electrodes, while the supporting busbar 6 and the circuit breaker gas box 2 form coaxial cylindrical electrodes. This promotes a more uniform distribution of charge on the electrode surface, maximizing the slightly non-uniform electric field distribution within the multi-cable gas box assembly. This reduces partial discharge, lowers the risk of breakdown, and improves insulation performance. Additionally, the supporting busbar 6 and the conductive busbar 5 are covered with insulating layers 61 and 51, forming composite insulation, further enhancing insulation performance. The insulating medium is an environmentally friendly gas, and under slightly positive pressure conditions, it meets the insulation level requirements of a 40.5kV switchgear.

[0030] This utility model's multi-cable gas box assembly is compatible with tank-type environmentally friendly gas-insulated switchgear. With this structure, users can easily connect cables to the switchgear without changing the original switchgear design, and it is interoperable.

[0031] This utility model discloses a multi-cable gas box assembly for an environmentally friendly gas-insulated cabinet. The other end of the circuit breaker gas box 2 is connected to a busbar compartment, etc., and the other end of the supporting busbar 6 is connected to a circuit breaker, disconnecting switch, main busbar, etc. This part is the same as or can be implemented using existing technology, and will not be described in detail here.

[0032] The above embodiments are only used to further illustrate the multi-cable gas box assembly of an environmentally friendly gas insulation cabinet of this utility model. However, this utility model is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of the technical solution of this utility model.

Claims

1. A multi-cable gas box assembly for an environmentally friendly gas-insulated cabinet, comprising interconnected cable gas boxes and circuit breaker gas boxes, characterized in that: The cable gas box is equipped with a support busbar and multiple cable sleeves. The multiple cable sleeves are respectively installed on the first side wall of the cable gas box and arranged side by side. Each cable sleeve contains a cable. One end of the multiple cables extends out of the cable gas box, and the other end is located inside the cable gas box and connected by a conductive busbar. The conductive busbar is arranged parallel to the first side wall. One end of the support busbar is connected to the conductive busbar, and the other end extends into the circuit breaker gas box. The circuit breaker gas box is cylindrical, and the support busbar is coaxially arranged with the circuit breaker gas box.

2. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 1, characterized in that: The circuit breaker gas box is installed on the outer side of the second side wall of the cable gas box, and the second side wall is arranged opposite to the first side wall.

3. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 1, characterized in that: The circuit breaker gas box is fitted with a current transformer.

4. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 1, characterized in that: The outer casing of the support busbar is provided with an insulating layer.

5. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 1, characterized in that: The conductive busbar is covered with an insulating layer.

6. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 1, characterized in that: The cable sleeve has two inlets and one outlet. The cable has two input ends and one output end. The cable sleeve is fitted over the cable. The two input ends extend from the two inlets and extend to the outside of the cable air box. The output end extends from the outlet and connects to the busbar.

7. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 6, characterized in that: The cable conduit has two inlets on one side that is fixedly connected to the first sidewall, and the first sidewall has an opening through which the two inlets can pass.

8. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to any one of claims 1-7, characterized in that: The cable gas boxes and circuit breaker gas boxes are of multiple types, with multiple cable gas boxes arranged side by side and adjacent cable gas boxes fixedly connected; multiple circuit breaker gas boxes are connected to multiple cable gas boxes in a one-to-one correspondence, and multiple circuit breaker gas boxes are all located on the same side of multiple cable gas boxes.

9. The multi-cable gas box assembly of the environmentally friendly gas insulation cabinet according to claim 8, characterized in that: The parallel arrangement of the multiple cable sleeves is perpendicular to the parallel arrangement of the multiple cable gas boxes.

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