Large-current solid-sealed polar pole with hollow insulator

Abstract

The utility model relates to the technical field of medium-high voltage switch cabinet accessories, and provides a large-current solid-sealed polar pole with a hollow insulator, which comprises an insulating shell, a vacuum arc-extinguishing chamber arranged in the lower insulating shell, and an upper wire outlet end and a lower wire outlet end arranged at the two ends of the vacuum arc-extinguishing chamber, and the insulating shell covers the upper wire outlet end and the lower wire outlet end; through holes are formed in the peripheral wall of the insulation shell, heat dissipation cavities communicated with the through holes are formed in the insulation shell along the axis of the insulation shell, the through holes comprise air inlet through holes and air outlet through holes, and the multiple through holes and the multiple heat dissipation cavities are formed at intervals along the axis of the insulation shell. The solid-sealed polar pole has the beneficial effect of improving the heat dissipation effect of the solid-sealed polar pole.

Description

Technical Field

[0001] This application relates to the technical field of medium and high voltage switchgear accessories, and particularly relates to a large current solid-sealed pole column with a hollow insulator. Background Art

[0002] A solid-sealed pole column is a main component used in a solid-sealed circuit breaker to break medium and high voltage currents. It generally consists of an insulating housing, upper and lower outlet seats, and other connecting parts. A vacuum interrupter is installed in the upper and lower outlet seats. With its excellent insulation and arc-extinguishing performance, the vacuum interrupter realizes the closing or opening of the circuit.

[0003] During the closing process of the vacuum interrupter, its moving and static contacts will come into contact with each other, and a certain amount of current will flow through the contact system and the interrupter. A large amount of heat will be generated during this process. The contact of the contacts will surely cause the temperature of each contact point in the vacuum interrupter to rise, seriously affecting the service life of the vacuum interrupter and the circuit breaker. In the prior art, the heat generation at the moving end of the vacuum interrupter is large and the heat dissipation condition is poor, resulting in poor heat dissipation effect of the solid-sealed pole column, affecting the service life and reliability of the existing solid-sealed pole column. Although additional auxiliary heat dissipation devices such as fans can be added, for example, in the case of forced air cooling, however, if the fan fails, it may lead to too high a temperature rise, which may endanger the safe operation of the vacuum circuit breaker. Therefore, further improvement is needed. Summary of the Utility Model

[0004] In order to improve the heat dissipation effect of the solid-sealed pole column, this application provides a large current solid-sealed pole column with a hollow insulator.

[0005] A large current solid-sealed pole column with a hollow insulator provided by this application adopts the following technical solutions:

[0006] A large current solid-sealed pole column with a hollow insulator includes an insulating housing, a vacuum interrupter disposed in the lower insulating housing, and upper and lower outlet ends disposed at both ends of the vacuum interrupter. The insulating housing covers the upper and lower outlet ends; through holes are formed in the outer peripheral wall of the insulating housing, and a heat dissipation chamber communicating with the through holes is wound along the axis of the insulating housing. The through holes include an air inlet through hole and an air outlet through hole, and a plurality of the through holes and the heat dissipation chamber are arranged at intervals along the axis of the insulating housing.

[0007] By adopting the above technical solutions, through the arrangement of the through holes and the heat dissipation chamber, the outside natural wind enters the heat dissipation chamber through the air inlet through hole, so that the heat below the internal vacuum interrupter and the heat generated by the lower outlet end are naturally dissipated from the air outlet through hole by means of air convection. Heat dissipation is carried out through natural wind, reducing the heat dissipation effect of other heat dissipation devices provided for the solid-sealed pole column.

[0008] Preferably, a second umbrella skirt is provided on the outer peripheral wall of the insulating housing below the through hole, and the upper surface of the second umbrella skirt is arc-shaped toward the direction close to the through hole.

[0009] By adopting the above technical solution, by providing the second umbrella skirt, the protection of the solid-sealed pole column is improved. Since the upper surface of the second umbrella skirt is arc-shaped toward the through hole, the external wind can flow along the upper surface of the second umbrella skirt toward the direction close to the through hole, so as to increase the air volume entering the heat dissipation chamber and improve the heat dissipation effect of the solid-sealed pole column.

[0010] Preferably, a connecting groove communicating with the through hole is provided on the upper surface of the second umbrella skirt, and the heat dissipation chamber is inclined toward the air outlet through hole.

[0011] By adopting the above technical solution, a connecting groove communicating with the through hole is provided above the second umbrella skirt. In rainy weather, water will fall to the connecting groove and enter the heat dissipation chamber from the air inlet through hole. Since the heat dissipation chamber is inclined toward the air outlet through hole, the heat-exchanged water can flow out from the air outlet through hole, so as to reduce the water staying in the heat dissipation chamber and affecting the subsequent heat dissipation of the solid-sealed pole column.

[0012] Preferably, a second umbrella skirt is also provided above the through hole at the uppermost part of the insulating housing, and the lower surface of the second umbrella skirt is arc-shaped toward the direction close to the through hole.

[0013] By adopting the above technical solution, similarly, the diversion of the wind can be further increased, so that as much wind blowing toward the insulating housing as possible enters the heat dissipation chamber through the air inlet through hole, so as to bring more heat to flow to the outside.

[0014] Preferably, the connecting groove extends to the edge of the second umbrella skirt, and a filter plate is provided in the second umbrella skirt within the connecting groove, and the upper end of the filter plate extends to the upper surface of the second umbrella skirt.

[0015] By adopting the above technical solution, by providing the filter plate, some sundries carried in the rainwater can be filtered, so as to reduce the possibility of blockage when rainwater or wind directly enters the heat dissipation chamber through the air inlet through hole, and the possibility of affecting the subsequent heat dissipation effect of the solid-sealed pole column.

[0016] Preferably, the upper end of the filter plate extends to the middle part of the through hole, and the filter plate is inclined toward the direction close to the through hole.

[0017] By adopting the above technical solution, the upper end of the filter plate is extended to the middle part of the through hole to improve the protection range of the filter plate for the sundries in the rainwater and reduce the possibility of blockage when the sand carried in the natural wind blowing toward the solid-sealed pole column enters the heat dissipation chamber through the air inlet through hole.

[0018] Preferably, the filter plate is detachably connected to the second umbrella skirt.

[0019] By adopting the above technical solution, it is convenient for replacement. After there is too much debris on the filter plate, it will affect the flow of water and the flow effect of wind passing through the filter plate.

[0020] Preferably, an arc-shaped plate is provided between the insulating housing above the air inlet through hole and the second umbrella skirt. The arc-shaped plate is arc-shaped away from the air inlet through hole. The gap between the arc-shaped plate and the second umbrella skirt below forms a flow channel communicating with the air inlet through hole.

[0021] By adopting the above technical solution, by providing an arc-shaped plate, since the gap between the arc-shaped plate and the second umbrella skirt below forms a flow channel communicating with the air inlet through hole, the flow path of wind entering the heat dissipation chamber is increased, and the possibility of some impurities in the wind entering the heat dissipation chamber and causing blockage is reduced.

[0022] Preferably, the insulating housing includes a first housing covering the vacuum interrupter, the upper outgoing line end and the lower outgoing line end, and a second housing coaxially sleeved on the first housing. A first groove is provided on the outer peripheral wall of the first housing, and a second groove communicating with it is provided on the inner wall of the second housing. The first groove and the second groove form a heat dissipation chamber, and the through hole is provided on the outer peripheral wall of the second housing.

[0023] By adopting the above technical solution, since there is an annular heat dissipation chamber provided in the insulating housing, it is difficult to achieve by injection molding. Therefore, the connection between the injection-molded first housing and the second housing is used to form the required heat dissipation chamber.

[0024] In summary, the present invention has the following beneficial effects:

[0025] By providing a through hole and a heat dissipation chamber, the outside natural wind enters the heat dissipation chamber through the air inlet through hole, so that the heat below the internal vacuum interrupter and the heat generated by the lower outgoing line end are naturally dissipated from the air outlet through hole by means of air convection. Heat dissipation is carried out by natural wind, reducing the heat dissipation effect of other heat dissipation devices provided for the solid-sealed pole column. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of Embodiment 1 of the present application;

[0027] Figure 2 is a schematic structural diagram of Embodiment 2 of the present application;

[0028] Figure 3 is Figure 2 a partial enlarged schematic diagram of part A in

[0029] Figure 4 It is a schematic structural diagram of Embodiment 3 of the present application.

[0030] Explanation of reference numerals: 1, vacuum interrupter; 11, upper outgoing terminal; 111, heat dissipation bracket; 12, lower outgoing terminal; 13, insulating pull rod; 131, first umbrella skirt; 2, insulating housing; 21, first housing; 211, first groove; 22, second housing; 221, second groove; 3, through hole; 31, air inlet through hole; 32, air outlet through hole; 4, heat dissipation chamber; 5, second umbrella skirt; 51, connecting groove; 52, filter plate; 6, arc-shaped plate. Detailed implementation manners

[0031] The following will further describe the present application in detail Figures 1-4 in conjunction with the accompanying drawings.

[0032] An embodiment of the present application discloses a large-current solid-sealed pole column with a hollow insulator.

[0033] Embodiment 1:

[0034] A large-current solid-sealed pole column with a hollow insulator, referring to Figure 1 , includes a vacuum interrupter 1, an upper outgoing terminal 11 and a lower outgoing terminal 12 provided at both ends of the vacuum interrupter 1, and an insulating housing 2 covering the vacuum interrupter 1, the upper outgoing terminal 11 and the lower outgoing terminal 12. The upper outgoing terminal 11 is electrically connected to the static end of the vacuum interrupter 1, and the lower outgoing terminal 12 is electrically connected to the moving end of the vacuum interrupter 1. An insulating pull rod 13 is provided at the lower end of the vacuum interrupter 1. A first umbrella skirt 131 is coaxially sleeved on the outer peripheral wall of the insulating pull rod 13. A plurality of first umbrella skirts 131 are arranged at intervals along the outer peripheral wall of the insulating pull rod 13. In this embodiment, the insulating housing 2 extends to the lower end of the insulating pull rod 13, and the first umbrella skirt 131 is coaxially sleeved on the outer peripheral wall of the insulating housing 2.

[0035] In this embodiment, a heat dissipation bracket 111 is fixedly connected to the top of the upper outgoing terminal 11 for heat dissipation with the outside natural wind.

[0036] In this embodiment, through holes 3 are formed in the outer peripheral wall of the insulating housing 2. A heat dissipation chamber 4 communicating with the through holes 3 is provided along the axis of the insulating housing 2. The through holes 3 include an air inlet through hole 31 and an air outlet through hole 32. A plurality of through holes 3 and heat dissipation chambers 4 are arranged at intervals along the axis of the insulating housing 2. For the formation of the heat dissipation chamber 4 and the through holes 3, specifically, the insulating housing 2 specifically includes a first housing 21 covering the vacuum interrupter 1, the upper outgoing terminal 11, and the lower outgoing terminal 12, and a second housing 22 coaxially sleeved on the first housing 21. A first groove 211 is formed in the outer peripheral wall of the first housing 21, and a second groove 221 communicating therewith is formed in the inner wall of the second housing 22. The first groove 211 and the second groove 221 form the heat dissipation chamber 4. At this time, the first umbrella skirt 131 is coaxially sleeved on the outer surface of the second housing 22, and the first umbrella skirt 131 is also provided on the inner peripheral wall of the second housing 22 and is fixedly connected to the insulating rod 13.

[0037] Wherein, a second umbrella skirt 5 is provided on the outer peripheral wall of the second housing 22 below the through hole 3, and a second umbrella skirt 5 is also provided above the uppermost through hole 3. The upper surface and the lower surface of the second umbrella skirt 5 are both arc-shaped towards the direction close to the through hole 3.

[0038] The implementation principle of a large-current solid-sealed pole column with a hollow insulator in an embodiment of the present application is as follows: By providing the through holes 3 and the heat dissipation chamber 4, the outside natural wind enters the heat dissipation chamber 4 through the air inlet through hole 31, so that the heat below the internal vacuum interrupter 1 and the heat generated by the lower outgoing terminal 12 are naturally dissipated from the air outlet through hole 32 by means of air convection. Heat dissipation is carried out through natural wind, reducing the heat dissipation effect of other heat dissipation devices provided for the solid-sealed pole column.

[0039] Embodiment 2:

[0040] Refer to Figure 2 , the difference from Embodiment 1 is that, further, to improve the heat dissipation effect of the solid-sealed pole column, in this embodiment, a connection groove 51 communicating with the through hole 3 is formed on the upper surface of the second umbrella skirt 5, and the connection groove 51 extends to the edge of the second umbrella skirt 5. At this time, the heat dissipation chamber 4 is inclined towards the air outlet through hole 32.

[0041] Further, to reduce the entry of external impurities into the heat dissipation chamber 4 along with rainwater or wind through the air inlet channel, in this embodiment, a filter plate 52 is provided in the connection groove 51 of the second umbrella skirt 5. The upper end of the filter plate 52 extends to the upper surface of the second umbrella skirt 5, the upper end of the filter plate 52 extends to the middle of the through hole 3, and the filter plate 52 is inclined towards the direction close to the through hole 3.

[0042] In this embodiment, the filter plate 52 is detachably connected to the second umbrella skirt 5. Specifically, a convex block protrudes from the filter plate 52, and a slot for the convex block to slide and insert is provided on the bottom inner wall of the connection groove 51 of the second umbrella skirt 5. The cooperation between the convex block and the insertion block is used to install the filter plate 52 in the connection groove 51.

[0043] Embodiment 3:

[0044] Refer to Figure 4 , the difference from Embodiment 1 is that an arc-shaped plate 6 is provided between the insulating housing 2 above the air inlet through hole 31 and the second umbrella skirt 5. The arc-shaped plate 6 is arranged in an arc shape away from the air inlet through hole 31. The gap between the arc-shaped plate 6 and the second umbrella skirt 5 below forms a flow channel communicating with the air inlet through hole 31.

[0045] By providing the arc-shaped plate 6, the possibility of some impurities in the wind entering the heat dissipation chamber 4 and causing blockage is further reduced.

[0046] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A high current sealed pole with a hollow insulator, characterized in that: The invention comprises an insulating shell (2), a vacuum arc extinguishing chamber (1) arranged in the lower insulating shell (2), and an upper outlet terminal (11) and a lower outlet terminal (12) arranged at two ends of the vacuum arc extinguishing chamber (1), wherein the insulating shell (2) covers the upper outlet terminal (11) and the lower outlet terminal (12); a through hole (3) is provided on the outer peripheral wall of the insulating shell (2); a heat dissipation chamber (4) connected to the through hole (3) is provided in the insulating shell (2) along its axis, the through hole (3) comprises an air inlet through hole (31) and an air outlet through hole (32); and a plurality of the through holes (3) and the heat dissipation chamber (4) are arranged at intervals along the axis of the insulating shell (2).

2. A high current sealed pole with a hollow insulator according to claim 1, characterized in that: A second umbrella skirt (5) is provided on the outer peripheral wall of the insulating housing (2) below the through hole (3), and the upper surface of the second umbrella skirt (5) is arranged in an arc shape in a direction close to the through hole (3).

3. A high current sealed pole with a hollow insulator according to claim 2, characterized in that: A connecting groove (51) connected to the through hole (3) is provided on the upper surface of the second umbrella skirt (5), and the heat dissipation chamber (4) is arranged inclined towards the air outlet through hole (32).

4. A high current sealed pole with a hollow insulator according to claim 3, characterized in that: A second umbrella skirt (5) is also provided above the uppermost through hole (3) of the insulating housing (2), and the lower surface of the second umbrella skirt (5) is arranged in an arc shape in a direction close to the through hole (3).

5. A high current sealed pole with a hollow insulator according to claim 4, characterized in that: The connecting groove (51) extends to the edge of the second umbrella skirt (5); the second umbrella skirt (5) is provided with a filter plate (52) in the connecting groove (51); the upper end of the filter plate (52) extends to the upper surface of the second umbrella skirt (5).

6. A high current sealed pole with a hollow insulator according to claim 5, characterized in that: The upper end of the filter plate (52) extends to the middle of the through hole (3), and the filter plate (52) is arranged inclined in a direction close to the through hole (3).

7. A high current sealed pole with a hollow insulator according to claim 5, characterized in that: The filter plate (52) is detachably connected to the second umbrella skirt (5).

8. The high current sealed pole with a hollow insulator according to claim 4, characterized in that: The insulating housing (2) is provided with an arc plate (6) located above the air inlet through hole (31) and between the second umbrella skirt (5); the arc plate (6) is arranged in an arc shape away from the air inlet through hole (31); a gap left between the arc plate (6) and the second umbrella skirt (5) below forms a flow channel connected to the air inlet through hole (31).

9. The large current sealed pole with a hollow insulator according to claim 1, characterized in that: The insulating housing (2) comprises a first housing (21) covering the vacuum arc extinguishing chamber (1), the upper outlet terminal (11) and the lower outlet terminal (12), and a second housing (22) coaxially sleeved on the first housing (21); a first groove (211) is provided on the outer peripheral wall of the first housing (21); a second groove (221) communicating with the first housing (21) is provided on the inner wall of the second housing (22); the first groove (211) and the second groove (221) form a heat dissipation chamber (4); and the through hole (3) is provided on the outer peripheral wall of the second housing (22).

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