Gas-insulated switchgear vacuum tube fixing device

Abstract

The utility model relates to the field of switch cabinet equipment, in particular to an inflatable cabinet vacuum tube fixing device which comprises a fixing support, three vacuum tube containing chambers are arranged in the fixing support, and a pull rod moving chamber is arranged at the front end of each vacuum tube containing chamber; a vacuum tube is clamped in each vacuum tube accommodating chamber, one end of each vacuum tube is provided with an insulating pull rod device, each insulating pull rod device is located in the corresponding pull rod moving chamber, the other end of each vacuum tube is provided with a connecting device, and one end, close to the vacuum tube, of each insulating pull rod device is connected with a conductive seat; the conductive seats are fixed on the fixing support, the conductive seats are used for connecting an upper branch bus, the problems of poor heat dissipation and inconvenient installation due to the fact that an original vacuum tube is fixedly sealed and poured are solved, and the vacuum tube fixing device of the gas-insulated switchgear can be quickly mounted and dismounted, is firm in fixation, has good ventilation and can solve the heat dissipation problem.

Description

Technical Field

[0001] The present application relates to the field of gas-insulated switchgear, and particularly to a fixing device for a vacuum tube in a gas-insulated switchgear cabinet. Background Art

[0002] The vacuum tube in the gas-insulated switchgear cabinet mainly plays a role in opening and closing the current for protection. The insulating housing material is mostly epoxy resin. The vacuum interrupter and other parts are cured and connected with epoxy resin through an automatic pressure gel molding process, and the entire pole column becomes an integral component, with an elliptical cylindrical shape.

[0003] The existing epoxy resin housing is prone to cracking, and the expansion coefficients of the ceramic shell of the vacuum interrupter and epoxy resin are too different, having the following problems:

[0004] 1. Cracking problems can be caused by improper operation or too rapid change in ambient temperature;

[0005] 2. The epoxy resin has poor heat dissipation. The overall gel molding coating thickness is large and the heat dissipation is poor. If the thickness is reduced, the mechanical strength will decrease;

[0006] 3. There are many parts, and the casting and curing and subsequent assembly steps are cumbersome and time-consuming; the large number of parts results in a still relatively large volume, restricting the internal space of the gas box; too many copper parts are expensive, and the external connection loop copper bars pass through the conductive blocks, increasing the hidden danger of heat generation due to poor contact.

[0007] In view of this, the present invention provides a fixing device for a vacuum tube that can be quickly replaced. As long as the bolts are removed, the installation and disassembly can be completed. The overall structure is simple, the heat dissipation is good, and the cost is low. Utility Model Content

[0008] Based on this, in view of the problem of using solid encapsulation casting for traditional vacuum tubes, a fixing device for a vacuum tube in a gas-insulated switchgear cabinet is proposed.

[0009] The present application provides a fixing device for a vacuum tube in a gas-insulated switchgear cabinet, including a fixing bracket. Three vacuum tube accommodation chambers are arranged inside the fixing bracket, and a pull rod activity chamber is arranged at the front end of each vacuum tube accommodation chamber;

[0010] A vacuum tube is clamped and arranged inside each vacuum tube accommodation chamber. One end of each vacuum tube is provided with an insulating pull rod device, and each insulating pull rod device is located in the corresponding pull rod activity chamber. The other end of each vacuum tube is provided with a connecting device. One end of each insulating pull rod device close to the vacuum tube is connected to a conductive seat, and each conductive seat is fixed on the fixing bracket. Each conductive seat is used for connecting the upper busbar, and the fixing bracket is made of insulating material.

[0011] Preferably, the fixed bracket includes an upper bracket and a lower bracket. The upper ends of the connecting devices are connected to the upper bracket, and the lower ends of the connecting devices are connected to the lower bracket.

[0012] Preferably, the upper bracket and the lower bracket are symmetric structures up and down.

[0013] Preferably, a plurality of limiting grooves are provided on both the upper bracket and the lower bracket, and the ends of the connecting devices are clamped in the corresponding limiting grooves.

[0014] Preferably, each of the connecting devices includes four symmetrically arranged connecting heads, an arc-shaped edge is provided between the connecting heads, corresponding limiting protrusions are provided on the fixed bracket, each of the connecting heads is clamped in the corresponding limiting groove, and each of the arc-shaped edges abuts against the corresponding limiting protrusion.

[0015] Preferably, bolt holes are provided on each of the connecting heads, and threaded holes are provided on each of the limiting grooves.

[0016] Preferably, a plurality of heat dissipation openings are provided on the surfaces of both the upper bracket and the lower bracket, and each heat dissipation opening communicates with the corresponding vacuum tube accommodating chamber.

[0017] Preferably, flow-through chambers are provided on both sides of each vacuum tube accommodating chamber, a flow-through opening is provided on the fixed bracket, and the flow-through opening communicates with the flow-through chamber.

[0018] Preferably, a left protective cover and a right protective cover are respectively provided on both sides of the fixed bracket, and the left protective cover and the right protective cover are fixedly connected to the fixed bracket by bolts.

[0019] Preferably, the connecting device is made of aluminum material, and the connecting device is used to support and connect the lower branch busbar.

[0020] Technical advantages of the present application:

[0021] 1. By providing an upper bracket and a lower bracket that can be quickly disassembled and replaced, only by installing or removing the connecting device and placing the vacuum tube into the vacuum tube accommodating chamber, the installation and replacement of the vacuum tube can be realized;

[0022] 2. The upper bracket and the lower bracket are disassembled and symmetrically arranged, so that the entire bracket can be manufactured using only one mold, and any two can be assembled, which is simple and convenient;

[0023] 3. The heat dissipation openings, flow-through chambers, and flow-through openings provided on the fixed bracket can not only provide a flow space to solve the heat dissipation problem, but also reduce the material volume and cost. Description of the Drawings

[0024] The accompanying drawings, which form a part of this application, are used to provide a further understanding of this application, making other features, objectives, and advantages of this application more obvious. The schematic embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application.

[0025] Figure 1 It is a schematic diagram of the installation position of the vacuum tube fixing device for the gas-insulated switchgear of this application.

[0026] Figure 2 It is a schematic diagram of the overall structure of the vacuum tube fixing device for the gas-insulated switchgear of this application.

[0027] Figure 3 It is an exploded view of the structure of the vacuum tube fixing device for the gas-insulated switchgear of this application.

[0028] Figure 4 It is a schematic cross-sectional view of the vacuum tube fixing device for the gas-insulated switchgear of this application.

[0029] Figure 5 It is a schematic side view of the vacuum tube fixing device for the gas-insulated switchgear of this application.

[0030] Figure 6 It is a schematic diagram of the structure of the connecting device of this application.

[0031] Figure 7 It is a schematic diagram of the structure of the upper bracket of this application.

[0032] Reference numerals: fixing bracket 1; upper bracket 11; limiting protrusion 101; limiting groove 110; threaded hole 111; lower bracket 12; left protective cover 14; right protective cover 15; vacuum tube 2; insulating pull rod device 3; connecting device 4; connecting head 41; arc edge 42; bolt hole 411; conductive seat 5; upper branch busbar 6; lower branch busbar 7; vacuum tube accommodation chamber 10; pull rod activity chamber 20; heat dissipation port 30; circulation chamber 40; circulation port 50. Detailed implementation manners

[0033] In order to more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of examples in combination with the accompanying drawings of the specification.

[0034] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0035] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form an integral body. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] As Figures 1 to 7 shown, to solve the problems of poor heat dissipation and inconvenient installation of the original vacuum tube using solid sealing and pouring, the present application provides a fixing device for the vacuum tube of an air-filled cabinet, which can achieve rapid installation and disassembly, while being firmly fixed and having good ventilation, and can solve the heat dissipation problem.

[0037] As Figures 1 - 5 shown, in an embodiment of the present application

[0038] As Figure 1 shown: The fixing bracket 1 of the present application is arranged in the middle of the air-filled cabinet. On both sides of the fixing bracket 1, a left protective cover 14 and a right protective cover 15 are respectively arranged. Bolt through holes are arranged on the parts of the fixing bracket 1 close to the left protective cover 14 and the right protective cover 15, and the left protective cover 14 and the right protective cover 15 fix the fixing bracket 1 through bolts.

[0039] Three groups of vacuum tubes 2 and insulating pull rod devices 3 are placed in the fixing bracket 1. The insulating pull rod device 3 makes the inside of the vacuum tube conduct or cut off through external mechanical expansion and contraction, thereby controlling the on-off of the circuit. One end of the insulating pull rod device 3 close to the vacuum tube 2 is connected with a conductive seat 5. A conductive rod and an upper busbar 6 are electrically connected to the conductive seat 5, and the upper busbar 6 is connected to the incoming line busbar.

[0040] At the other end of the vacuum tube 2 away from the insulating pull rod device 3, a connecting device 4 is provided. The connecting device 4 is used for supporting when the vacuum tube 2 is connected to the lower busbar 7 on the one hand, and can limit the position of the vacuum tube 2 on the other hand.

[0041] As Figures 2 to 4 shown: The present application provides a fixing device for the vacuum tube of an air-filled cabinet, including a fixing bracket 1. Three vacuum tube accommodation chambers 10 are arranged in the fixing bracket 1, and a pull rod activity chamber 20 is arranged at the front end of each vacuum tube accommodation chamber 10;

[0042] Each vacuum tube accommodating chamber 10 is internally clamped with a vacuum tube 2. One end of each vacuum tube 2 is connected with an insulating pull rod device 3. Each insulating pull rod device 3 is located in a corresponding pull rod activity chamber 20. The other end of each vacuum tube 2 is provided with a connecting device 4. Each conductive seat 5 is fixed on the fixed bracket 1. Each conductive seat 5 is used to connect to the upper bus bar 6. The fixed bracket 1 is made of insulating material.

[0043] For more convenient installation, the fixed bracket 1 includes an upper bracket 11 and a lower bracket 12. The upper end of the connecting device 4 is connected to the upper bracket 11, and the lower end of each connecting device 4 is connected to the lower bracket 12.

[0044] To reduce the mold cost and at the same time reduce classification, the upper bracket 11 and the lower bracket 12 in the present utility model have a vertically symmetric structure. Therefore, any two bracket frames can be assembled to form the fixed bracket 1.

[0045] To fix the connecting device 4, a plurality of limiting grooves 110 are provided on both the upper bracket 11 and the lower bracket 12. The limiting grooves 110 are provided at the ends of each vacuum tube accommodating chamber 10. The end of each connecting device 4 is clamped in the corresponding limiting groove 110.

[0046] As Figures 5 to 6 shown, the connecting device 4 of the present utility model includes four symmetrically arranged connecting heads 41.

[0047] Four limiting grooves 110 are provided at the corresponding positions on the fixed bracket 1, that is, two are provided on each of the upper bracket 11 and the lower bracket 12, and they are symmetrically arranged up and down, left and right. Each connecting head 41 is clamped and fixed in the limiting groove 110.

[0048] To further prevent the connecting device 4 from moving, an arc-shaped edge 42 is provided between each pair of connecting heads 41. At the same time, a limiting protrusion 101 is provided at the corresponding position on the fixed bracket 1. In this way, each connecting head 41 is clamped in the corresponding limiting groove 110, and each arc-shaped edge 42 abuts against the corresponding limiting protrusion 101. The double clamping makes the connecting device 4 firmly fixed on one side of the vacuum tube 2 in the mechanical mechanism.

[0049] To further fix the connecting device 4, a bolt hole 411 is provided on each connecting head 41, and a threaded hole 111 is provided on each limiting groove 110. The connecting device 4 is fixed to the fixed bracket 1 by a bolt passing through the bolt hole 411 and connecting to the threaded hole 111.

[0050] The connecting device 4 of the present utility model is made of aluminum material. The connecting device 4 plays a role in fixing and supporting, and the outside can be used to fix the lower bus bar 7, so that the vacuum tube 2 and the lower bus bar 7 are electrically connected.

[0051] To solve the heat dissipation problem, as Figure 3 , Figure 4 , Figure 7 shown, on the fixed bracket 1, there are preset flow channels and openings. The heat dissipation ports, flow chambers, and flow openings provided on the fixed bracket 1 can not only provide a flow space to solve the heat dissipation problem, but also reduce the material volume and lower the cost.

[0052] Specifically, as Figure 3 shown, a plurality of heat dissipation ports 30 are provided on the surfaces of the upper bracket 11 or the lower bracket 12, and each heat dissipation port 30 is communicated with the corresponding vacuum tube accommodating chamber 10.

[0053] As Figure 5 shown, flow chambers 40 are provided on both sides of each vacuum tube accommodating chamber 10. At the same time, flow chambers 40 are provided between two adjacent vacuum tube accommodating chambers 10, sharing one flow chamber 40. The side vacuum tubes 2 are also connected to the flow chamber 40. A flow opening 50 is provided on the fixed bracket 1, and the flow opening 50 is communicated with the flow chamber 40.

[0054] In the present utility model, by providing an upper bracket and a lower bracket that can be quickly disassembled and replaced, only by installing or removing the connecting device and placing the vacuum tube into the vacuum tube accommodating chamber, the installation and replacement of the vacuum tube can be achieved; the upper bracket and the lower bracket are split and symmetrically arranged, so that the entire bracket can be manufactured using only one mold, and any two can be assembled, which is simple and convenient; the heat dissipation ports, flow chambers, and flow openings provided on the fixed bracket can not only provide a flow space to solve the heat dissipation problem, but also reduce the material volume and lower the cost.

[0055] For the technical features of the above-described embodiments, any combination can be made, and there is no limitation on the execution order of the method steps. For the sake of simplicity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0056] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An inflatable cabinet vacuum tube fixing device, characterized in that, It includes a fixed bracket (1), and three vacuum tube accommodating chambers (10) are arranged inside the fixed bracket (1). A pull rod activity chamber (20) is arranged at the front end of each vacuum tube accommodating chamber (10). A vacuum tube (2) is snap-fitted inside each vacuum tube accommodating chamber (10). An insulating pull rod device (3) is arranged at one end of each vacuum tube (2). Each insulating pull rod device (3) is located inside the corresponding pull rod activity chamber (20). A connecting device (4) is arranged at the other end of each vacuum tube (2). A conductive seat (5) is connected to one end of each insulating pull rod device (3) close to the vacuum tube (2). Each conductive seat (5) is fixed on the fixed bracket (1). Each conductive seat (5) is used to connect to the upper busbar (6). The fixed bracket (1) is made of insulating material.

2. The vacuum tube fixing device of the gas-insulated switchgear according to claim 1, wherein, The fixed bracket (1) includes an upper bracket (11) and a lower bracket (12). The upper ends of each connecting device (4) are connected to the upper bracket (11), and the lower ends of each connecting device (4) are connected to the lower bracket (12).

3. The vacuum tube fixing device for the gas-insulated switchgear according to claim 2, characterized in that, The upper bracket (11) and the lower bracket (12) are symmetric structures up and down.

4. The vacuum tube fixing device for the gas-insulated switchgear according to claim 3, characterized in that, A plurality of limiting grooves (110) are arranged on both the upper bracket (11) and the lower bracket (12). The end of each connecting device (4) is snap-fitted inside the corresponding limiting groove (110).

5. The vacuum tube fixing device for an inflatable cabinet according to claim 4, characterized in that, Each connecting device (4) includes four symmetrically arranged connecting heads (41). An arc-shaped edge (42) is arranged between each connecting head (41). Corresponding limiting protrusions (101) are arranged on the fixed bracket (1). Each connecting head (41) is snap-fitted inside the corresponding limiting groove (110), and each arc-shaped edge (42) abuts against the corresponding limiting protrusion (101).

6. The vacuum tube fixing device for a gas-insulated switchgear according to claim 5, characterized in that, A bolt hole (411) is arranged on each connecting head (41), and a threaded hole (111) is arranged on each limiting groove (110).

7. The vacuum tube fixing device of the gas-insulated switchgear according to claim 6, characterized in that, A plurality of heat dissipation openings (30) are arranged on the surfaces of both the upper bracket (11) and the lower bracket (12). Each heat dissipation opening (30) communicates with the corresponding vacuum tube accommodating chamber (10).

8. The vacuum tube fixing device for an inflatable cabinet according to claim 7, characterized in that, A flow-through chamber (40) is arranged on both sides of each vacuum tube accommodating chamber (10). A flow-through opening (50) is arranged on the fixed bracket (1). The flow-through opening (50) communicates with the flow-through chamber (40).

9. The vacuum tube fixing device for an inflatable cabinet according to claim 8, characterized in that A left protective cover (14) and a right protective cover (15) are respectively arranged on both sides of the fixed bracket (1). The left protective cover (14) and the right protective cover (15) are fixedly connected to the fixed bracket (1) by bolts.

10. The vacuum tube fixing device for the gas-insulated switchgear according to claim 1, characterized in that, The connecting device (4) is made of aluminum material, and the connecting device (4) is used to support and connect the lower busbar (7).

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