阅读说明：本技术 一种固封极柱隔离触头座组件及开关柜 (Solid-sealed polar pole isolation contact seat assembly and switch cabinet ) 是由 祁海洋 潘明 朱彦卿 窦中萍 朱志豪 王海燕 朱启媛 唐猛 张�浩 杨委员 于 2021-06-22 设计创作，主要内容包括：本发明涉及一种固封极柱隔离触头座组件及开关柜,固封极柱隔离触头座组件包括固封极柱和隔离触头座,固封极柱包括绝缘壳体,真空灭弧室位于绝缘壳体内部,真空灭弧室包括静端和动端,绝缘壳体内具有供动端活动的动端活动腔。隔离触头座包括座体和与座体连接的连接臂,座体上设有用于与动触头导电且供动触头穿过的动触头穿孔,连接臂伸入动端活动腔内与动端通过软连接导电连接,连接臂上设有触头座散热通道,触头座散热通道连通动触头穿孔与动端活动腔,使动端活动腔的热量能够通过触头座散热通道散出。本发明的目的在于提供一种固封极柱隔离触头座组件,用以解决现有的固封极柱在自然风冷的条件下温升高的问题。(The invention relates to an embedded pole isolating contact seat assembly and a switch cabinet. Keep apart the contact seat and include pedestal and the linking arm of being connected with the pedestal, be equipped with on the pedestal to be used for electrically conducting with the moving contact and supply the moving contact to pass the moving contact perforation, the linking arm stretches into and moves end activity intracavity and move the end and pass through the flexible coupling and electrically conduct and be connected, is equipped with contact seat heat dissipation channel on the linking arm, and contact seat heat dissipation channel intercommunication moving contact is perforated and is moved end activity chamber, makes the heat in end activity chamber can radiate through contact seat heat dissipation channel. The invention aims to provide an isolated contact seat assembly of an embedded pole, which is used for solving the problem that the temperature of the existing embedded pole is high under the condition of natural air cooling.)

1. An isolation contact seat assembly of an embedded pole comprises an embedded pole and an isolation contact seat (7);

the solid-sealed polar pole comprises:

an insulating housing (1);

the vacuum arc-extinguishing chamber (2) is positioned inside the insulating shell (1), and the vacuum arc-extinguishing chamber (2) comprises a static end and a movable end; a moving end moving cavity (6) for moving the moving end is arranged in the insulating shell (1);

the isolation contact seat (7) comprises a seat body (71), wherein the seat body (71) is provided with a moving contact through hole (12) which is used for conducting electricity with the moving contact (13) and allowing the moving contact (13) to pass through;

it is characterized in that the utility model is characterized in that,

the isolation contact seat (7) also comprises a connecting arm connected with the seat body (71), and the connecting arm extends into the movable cavity (6) of the movable end and is electrically connected with the movable end through a flexible connection (9);

the connecting arm is provided with a contact seat heat dissipation channel (18), the contact seat heat dissipation channel (18) is communicated with the moving contact perforation (12) and the moving end movable cavity (6), and heat of the moving end movable cavity (6) can be dissipated through the contact seat heat dissipation channel (18).

2. The isolated contact holder assembly of an embedded pole according to claim 1, wherein the insulating housing (1) is provided with a pole heat dissipation hole (11) communicating the movable end cavity (6) with the outside.

3. The isolated contact holder assembly for the embedded pole according to claim 2, wherein the connecting arm comprises an arm body (72) and a conductive connecting seat (73) at one end of the arm body (72) extending into the insulating housing (1), the conductive connecting seat (73) is provided with a moving end connecting hole (8), the moving end is electrically connected with the hole wall of the moving end connecting hole (8) through the flexible connection (9), and the conductive connecting seat (73) is provided with connecting seat heat dissipation holes (10) opposite to the pole heat dissipation holes (11).

4. The isolated contact holder assembly of claim 3, wherein the contact holder heat dissipation channel (18) of the electrically conductive contact holder (73) opens to face the aperture of the contact holder heat dissipation aperture (10).

5. The isolated contact base assembly of any one of claims 1 to 4, wherein the inner wall of the through hole (12) of the movable contact is provided with a ventilation slot, and one end of the heat dissipation channel (18) of the contact base is open at the bottom of the ventilation slot.

6. The isolated post contact housing assembly of claim 5, wherein said ventilation slot is an annular ventilation slot (16).

7. The isolated contact base assembly of an embedded pole according to claim 5, wherein the bottom of the ventilation slot is provided with a contact base heat dissipation hole (17) for communicating the outside with the moving contact through hole (12).

8. The isolated contact holder assembly of claim 7, wherein the contact holder heat dissipation hole (17) is provided in plurality.

9. The isolated contact holder assembly of any one of claims 1 to 4, wherein the moving contact through hole (12) is provided with a finger groove (14), and the finger groove (14) is used for mounting a finger (15).

10. The switch cabinet comprises an embedded pole isolation contact seat assembly, an isolation static contact seat (21) and a moving contact (13), wherein the moving contact (13) is in conductive connection with the embedded pole isolation contact seat assembly, and the moving contact (13) is used for being communicated with the isolation static contact seat (21).

Technical Field

The invention relates to an isolated contact seat assembly of a solid-sealed polar pole and a switch cabinet.

Background

The solid-sealed pole is formed by simultaneously embedding the vacuum arc-extinguishing chamber and the related conductive parts of the circuit breaker into a thermosetting or thermoplastic insulating material, so that the whole circuit breaker pole forms an integral component. The solid-sealed polar pole comprises an insulating shell and a vacuum arc-extinguishing chamber inside the insulating shell, the upper part of the vacuum arc-extinguishing chamber is a static end and is connected with an upper wire-outgoing end, the lower part of the vacuum arc-extinguishing chamber is a movable end, the movable end comprises a movable conducting rod, and the movable conducting rod is connected with a lower wire-outgoing terminal through a flexible connection, so that a main conducting loop is formed. The existing solid-sealed polar pole is often overproof in temperature rise in natural air cooling under the condition of large current, so that a fan is mostly adopted for forced cooling in order to reduce the temperature rise. But the fan is used for cooling, so that the daily maintenance workload is increased, and the overall reliability of the equipment is reduced.

Disclosure of Invention

The invention aims to provide an isolated contact seat assembly of an embedded pole, which is used for solving the problem that the temperature of the existing embedded pole is high under the condition of natural air cooling. The invention also provides a switch cabinet, which is used for solving the problem that the temperature rise of the existing solid-sealed polar pole is high under the natural air cooling condition.

The technical scheme of the isolation contact seat component of the solid-sealed polar pole is as follows:

the solid-sealed polar pole isolation contact seat component comprises: the embedded pole and the isolation contact seat;

the solid-sealed polar pole comprises:

an insulating housing;

the vacuum arc extinguish chamber is positioned inside the insulating shell and comprises a static end and a movable end; a movable end moving cavity for moving the movable end is arranged in the insulating shell;

the isolation contact seat comprises a seat body, wherein the seat body is provided with a moving contact through hole which is used for conducting electricity with the moving contact and allowing the moving contact to pass through;

the isolation contact seat also comprises a connecting arm connected with the seat body, and the connecting arm extends into the movable cavity of the movable end and is in conductive connection with the movable end through flexible connection;

the connecting arm is provided with a contact seat heat dissipation channel which is communicated with the moving contact perforation and the moving end moving cavity, so that heat in the moving end moving cavity can be dissipated through the contact seat heat dissipation channel.

Has the advantages that: the isolation contact seat assembly of the solid-sealed polar pole integrates the isolation contact seat and the solid-sealed polar pole, and is communicated with the moving contact perforation and the moving end movable cavity through the contact seat heat dissipation channel, and the heat of the moving end movable cavity can flow out from the moving contact perforation along the contact seat heat dissipation channel, so that the heat dissipation efficiency of the moving end movable cavity is effectively improved, and the temperature rise of the solid-sealed polar pole under the natural air cooling condition is further reduced.

Furthermore, the insulating shell is provided with a pole heat dissipation hole for communicating the movable end cavity with the outside.

Has the advantages that: the arrangement of the pole radiating holes further improves the radiating efficiency of the movable end cavity.

Furthermore, the connecting arm comprises an arm body and a conductive connecting seat positioned at one end, extending into the insulating shell, of the arm body, the conductive connecting seat is provided with a moving end connecting hole, a moving end is in conductive connection with the hole wall of the moving end connecting hole through the flexible connection, and the conductive connecting seat is provided with connecting seat radiating holes opposite to the pole radiating holes.

Has the advantages that: the setting of electrically conductive connecting seat has increased the through-flow area of linking arm and vacuum interrupter's the end that moves, in addition, sets up the connecting seat louvre on the electrically conductive connecting seat for the inside heat of electrically conductive connecting seat can flow out through the connecting seat louvre, and dispel the external world through utmost point post louvre.

Furthermore, the opening of the contact seat heat dissipation channel on the conductive connecting seat is opposite to the hole opening of the connecting seat heat dissipation hole.

Has the advantages that: the arrangement can improve the convection effect between the inside of the insulating shell and the outside, and improve the heat dissipation efficiency of the heat inside the insulating shell.

Furthermore, a ventilation groove is formed in the inner wall of the moving contact through hole, and an opening at one end of the contact seat heat dissipation channel is located at the bottom of the ventilation groove.

Has the advantages that: the arrangement enables the interval between the opening at one end of the contact seat heat dissipation channel and the moving contact to be larger, and heat can be conveniently dissipated from the opening of the contact seat heat dissipation channel.

Further, the ventilation groove is an annular ventilation groove.

Has the advantages that: the annular ventilation groove is simple in structure and convenient to machine and form.

Furthermore, the bottom of the ventilation groove is provided with a contact seat heat dissipation hole which is communicated with the outside and the moving contact through hole.

Has the advantages that: the arrangement of the heat dissipation holes of the contact seat is convenient for heat to be dissipated outwards, so that heat accumulation in the through holes of the moving contact is avoided, and temperature rise is effectively reduced.

Further, the contact seat heat dissipation holes are provided in plurality.

Has the advantages that: the heat dissipation efficiency of the arrangement of the plurality of contact seat heat dissipation holes is higher.

Furthermore, a contact finger groove is arranged in the moving contact through hole and used for installing a contact finger.

Has the advantages that: the contact finger has stronger through-current capability, and the through-current capability between the base body and the moving contact is improved.

The technical scheme of the switch cabinet is as follows:

the switch cabinet comprises an embedded pole isolation contact seat component, an isolation stationary contact seat and a moving contact, wherein the moving contact is in conductive connection with the embedded pole isolation contact seat component, the moving contact is used for being communicated with the isolation stationary contact seat, and the embedded pole isolation contact seat component comprises an embedded pole and an isolation contact seat;

the solid-sealed polar pole comprises:

an insulating housing;

the vacuum arc extinguish chamber is positioned inside the insulating shell and comprises a static end and a movable end; a movable end moving cavity for moving the movable end is arranged in the insulating shell;

the isolation contact seat comprises a seat body, wherein the seat body is provided with a moving contact through hole which is conductive with the moving contact and through which the moving contact passes;

the isolation contact seat also comprises a connecting arm connected with the seat body, and the connecting arm extends into the movable cavity of the movable end and is in conductive connection with the movable end through flexible connection;

the connecting arm is provided with a contact seat heat dissipation channel which is communicated with the moving contact perforation and the moving end moving cavity, so that heat in the moving end moving cavity can be dissipated through the contact seat heat dissipation channel.

Has the advantages that: the isolation contact seat assembly of the solid-sealed polar pole integrates the isolation contact seat and the solid-sealed polar pole, and is communicated with the moving contact perforation and the moving end movable cavity through the contact seat heat dissipation channel, and the heat of the moving end movable cavity can flow out from the moving contact perforation along the contact seat heat dissipation channel, so that the heat dissipation efficiency of the moving end movable cavity is effectively improved, and the temperature rise of the solid-sealed polar pole under the natural air cooling condition is further reduced.

Furthermore, the insulating shell is provided with a pole heat dissipation hole for communicating the movable end cavity with the outside.

Has the advantages that: the arrangement of the pole radiating holes further improves the radiating efficiency of the movable end cavity.

Furthermore, the connecting arm comprises an arm body and a conductive connecting seat positioned at one end, extending into the insulating shell, of the arm body, the conductive connecting seat is provided with a moving end connecting hole, a moving end is in conductive connection with the hole wall of the moving end connecting hole through the flexible connection, and the conductive connecting seat is provided with connecting seat radiating holes opposite to the pole radiating holes.

Has the advantages that: the setting of electrically conductive connecting seat has increased the through-flow area of linking arm and vacuum interrupter's the end that moves, in addition, sets up the connecting seat louvre on the electrically conductive connecting seat for the inside heat of electrically conductive connecting seat can flow out through the connecting seat louvre, and dispel the external world through utmost point post louvre.

Furthermore, the opening of the contact seat heat dissipation channel on the conductive connecting seat is opposite to the hole opening of the connecting seat heat dissipation hole.

Has the advantages that: the arrangement can improve the convection effect between the inside of the insulating shell and the outside, and improve the heat dissipation efficiency of the heat inside the insulating shell.

Furthermore, a ventilation groove is formed in the inner wall of the moving contact through hole, and an opening at one end of the contact seat heat dissipation channel is located at the bottom of the ventilation groove.

Has the advantages that: the arrangement enables the interval between the opening at one end of the contact seat heat dissipation channel and the moving contact to be larger, and heat can be conveniently dissipated from the opening of the contact seat heat dissipation channel.

Further, the ventilation groove is an annular ventilation groove.

Has the advantages that: the annular ventilation groove is simple in structure and convenient to machine and form.

Furthermore, the bottom of the ventilation groove is provided with a contact seat heat dissipation hole which is communicated with the outside and the moving contact through hole.

Has the advantages that: the arrangement of the heat dissipation holes of the contact seat is convenient for heat to be dissipated outwards, so that heat accumulation in the through holes of the moving contact is avoided, and temperature rise is reduced.

Further, the contact seat heat dissipation holes are provided in plurality.

Has the advantages that: the heat dissipation efficiency of the arrangement of the plurality of contact seat heat dissipation holes is higher.

Furthermore, a contact finger groove is arranged in the moving contact through hole, and a contact finger is arranged in the contact finger groove.

Has the advantages that: the contact finger has stronger through-current capability, and the through-current capability between the base body and the moving contact is improved.

Drawings

Fig. 1 is a cross-sectional view of a first embodiment of an isolated contact base assembly of an embedded pole of the present invention;

FIG. 2 is a block diagram of an isolation contact block;

FIG. 3 is a cross-sectional view of an isolation contact block;

FIG. 4 is a schematic view of the connection between the isolated contact seat assembly of the embedded pole and the movable contact and isolated stationary contact seat;

FIG. 5 is a block diagram of an isolated stationary contact;

fig. 6 is a bottom view of fig. 5.

In the figure: 1. an insulating housing; 2. a vacuum arc-extinguishing chamber; 3. a movable conductive rod; 4. an insulating pull rod; 5. a conductive block; 6. a movable end cavity; 7. isolating the contact seat; 71. a base body; 72. an arm body; 73. a conductive connecting seat; 8. a moving end connecting hole; 9. soft connection; 10. heat dissipation holes of the connecting seat; 11. the pole column is provided with heat dissipation holes; 12. the moving contact is perforated; 13. a moving contact; 14. a finger touch groove; 15. a contact finger; 16. an annular ventilation slot; 17. heat dissipation holes of the contact base; 18. a contact seat heat dissipation channel; 19. a gear; 20. a rack; 21. isolating the stationary contact seat; 211. statically contacting the pipe column; 212. a wiring terminal; 213. an insulator; 22. inserting into the channel; 23. a vent; 24. contact heat dissipation channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The first embodiment of the isolated contact seat component of the embedded pole comprises the following steps:

as shown in fig. 1, the isolation contact assembly of the solid-sealed polar pole comprises the solid-sealed polar pole and an isolation contact seat 7, the solid-sealed polar pole comprises an insulating shell 1 extending along the vertical direction, a vacuum arc extinguish chamber 2 is arranged inside the insulating shell 1, the vacuum arc extinguish chamber 2 comprises a static end on the upper portion and a movable end on the lower portion, and the movable end slides up and down to realize connection and disconnection with the static end of the vacuum arc extinguish chamber 2. The movable end is positioned in a movable end movable cavity 6 which is arranged in the insulating shell 1 and is used for moving the movable end up and down, the movable end of the vacuum arc extinguish chamber 2 comprises a movable conducting rod 3, the movable conducting rod 3 is fastened and assembled with an insulating pull rod 4 in a threaded connection mode, the insulating pull rod 4 is driven by a driving mechanism corresponding to a circuit breaker, and the insulating pull rod 4 drives the movable conducting rod 3 to reciprocate up and down so as to realize the switching-on and switching-off operations of the vacuum arc extinguish chamber 2.

The movable conducting rod 3 is fixedly provided with the conducting block 5, the conducting block 5 is in conductive connection with the movable conducting rod 3, the conducting block 5 is provided with a mounting hole for being connected with the movable conducting rod 3 in an inserting mode, the outer peripheral face of the movable conducting rod 3 is a conical face, the mounting hole in the conducting block 5 is a corresponding conical hole, the conducting block 5 and the movable conducting rod 3 form conical face fit when being assembled, the combination is tight, the through-current capacity is guaranteed, and the poor contact phenomenon between the conducting block 5 and the movable conducting rod 3 is effectively avoided.

As shown in fig. 2 and 3, the isolating contact block 7 includes a block body 71 and a connecting arm, and the connecting arm includes an arm body 72 and a conductive connecting block 73. The isolation contact seat 7 is integrally formed, and the integrally formed isolation contact seat 7 has small heat generation amount in a through-flow state.

Conductive connection seat 73 is the tube-shape casing, is equipped with on the tube-shape casing and moves end connecting hole 8, and vacuum interrupter 2 moves the end and inserts conductive connection seat 73 through moving end connecting hole 8, and conductive block 5 is electrically conductive with the pore wall of moving end connecting hole 8 through flexible coupling 9, and is concrete, and flexible coupling 9 includes several copper braid over braid, and the copper braid over braid encircles conductive block 5 and sets up, and conductive block 5 is connected to copper braid over braid one end, and one end is connected with the pore wall of moving end connecting hole 8. In addition, the hole wall of the movable end connecting hole 8 is provided with a connecting seat heat dissipation hole 10, correspondingly, the insulating shell 1 is provided with a pole heat dissipation hole 11, the hole opening of the connecting seat heat dissipation hole 10 is over against the hole opening of the pole heat dissipation hole 11, and the arrangement is convenient for discharging heat inside the insulating shell 1. The flexible connection 9 is a flexible conductor commonly used in the field, and can realize conductive connection between two conductors moving relatively, and the commonly used flexible connection is in the form of copper foil, copper stranded wire, steel belt and the like besides a copper braided belt.

The base body 71 is a cylindrical shell, a moving contact through hole 12 is formed in the cylindrical shell, the moving contact through hole 12 is used for installing a moving contact 13, annular contact finger grooves 14 which are symmetrically arranged up and down are formed in the inner wall of the moving contact through hole 12, contact fingers 15 are installed in the contact finger grooves 14, and the base body 71 is in conductive connection with the moving contact 13 through the contact fingers 15. In addition, be equipped with the ventilation groove on the moving contact perforation 12 inner wall, in this embodiment, the ventilation groove is annular ventilation groove 16, and annular ventilation groove 16 is located between two touch finger grooves 14, and is provided with a plurality of touch seat louvres 17 on the tank bottom of annular ventilation groove 16, and the setting of touch seat louvre 17 can be better with the heat that produces between moving contact 13 and the pedestal 71 distribute away.

One end of the arm 72 is connected to the base 71, and the other end is connected to the conductive connecting socket 73, and the arm 72 is used for electrically connecting the conductive connecting socket 73 and the base 71. Be equipped with contact seat heat dissipation channel 18 in the arm body 72, the inside intercommunication of contact seat heat dissipation channel 18 one end opening and electrically conductive connecting seat 73, one end opening and the moving contact perforation 12 intercommunication of pedestal 71 and this opening locate annular ventilation groove 16's tank bottoms, the heat that moves the inside production in end activity chamber 6 can flow in annular ventilation groove 16 and discharge through contact seat louvre 17 through contact seat heat dissipation channel 18, the heat that produces in the moving contact perforation 12 also can flow in and move the end activity intracavity 6 and discharge through utmost point post louvre 11 through contact seat heat dissipation channel 18. Particularly, the opening of the contact seat heat dissipation channel 18 on the conductive connection seat 73 is opposite to the orifice of the connection seat heat dissipation hole 10, so that the convection effect between the moving contact perforation 12 and the moving end moving cavity 6 and the outside is enhanced, and the heat dissipation efficiency is improved.

As shown in fig. 4, the movable contact 13 is installed in the movable contact through hole 12 of the base 71 in a vertically guiding manner, an isolation stationary contact 21 is provided below the movable contact 13, the isolation stationary contact 21 is fixedly installed on the cabinet body of the switch cabinet, and during a stroke in which the movable contact 13 moves vertically, there are an on-position in which the isolation stationary contact 21 is connected and an isolation position in which the isolation stationary contact 21 is disconnected. The isolation static contact seat 21 is provided with an insertion channel 22 for inserting the moving contact 13, one end of the insertion channel 22 is provided with a moving contact insertion hole for inserting the moving contact 13, the other end of the insertion channel 22 is provided with a ventilation opening 23 communicated with the outside, a through contact heat dissipation channel 24 is arranged in the moving contact 13, when the moving contact 13 is in a switching-on station, the contact heat dissipation channel 24 is communicated with the insertion channel 22, so that air flow can enter and exit through the insertion channel 22 and the contact heat dissipation channel 24, and heat dissipation of the moving contact 13 and the isolation static contact seat 21 is realized.

Specifically, as shown in fig. 5 and 6, the isolation stationary contact 21 includes a stationary contact column 211 and a connection terminal 212, the stationary contact column 211 has an insertion channel 22 for inserting the movable contact 13, one end of the insertion channel 22 is a movable contact insertion port, the other end of the insertion channel has a vent 23 communicated with the outside, the connection terminal 212 is used for being connected with a cable in the switch cabinet, and the connection terminal 212 is connected with one end of the stationary contact column 211 and is disposed at the vent 23 of the stationary contact column 211. In addition, in order to prevent the cabinet body of the switch cabinet from being electrified when the isolation stationary contact 21 is switched on, the isolation stationary contact 21 further comprises an insulator 213 arranged on the outer peripheral surface of the stationary contact column 211, and the stationary contact column 211 and the connection terminal 212 are fixed on the cabinet body of the switch cabinet through the insulator 213.

As shown in fig. 4, the whole movable contact 13 is a hollow straight tube, an internal channel of the hollow straight tube is a contact heat dissipation channel 24, when the movable contact 13 is at a switch-on station, the contact heat dissipation channel 24, the insertion channel 22 and the ventilation opening 23 are communicated with each other, an air flow can enter and exit the insertion channel 22 and the contact heat dissipation channel 24 through the ventilation opening 23, and heat generated at the movable contact 13 and the isolation stationary contact 21 can be exhausted along with the air flow. In addition, the chimney effect is utilized in the vertical arrangement of the moving contact 13, the convection effect between the contact heat dissipation channel 24 and the insertion channel 22 and the outside is enhanced, and heat generated at the moving contact 13 and the isolation static contact seat 21 can be discharged through the contact heat dissipation channel 24 and the insertion channel 22 more quickly.

In addition, in order to facilitate the sliding of the movable contact 13 in the movable contact through hole 12, a gear 19 is installed at an opening of the contact block heat dissipation channel 18 on the annular ventilation slot 16, and the gear 19 is engaged with a rack 20 arranged along the extending direction of the movable contact 13, so as to realize the up-and-down movement of the movable contact 13. When the movable contact 13 moves upward until the lower end of the movable contact 13 is separated from the isolation stationary contact 21 to form an isolation fracture, the movable contact 13 is at an isolation station, the isolation stationary contact 21 and the seat body 71 are in a disconnection state, and when the movable contact 13 moves downward until the lower end of the movable contact 13 is contacted with the isolation stationary contact 21, the movable contact 13 is at a connection station, and the isolation stationary contact 21 and the seat body 71 are in a conduction state.

The isolation contact seat component of the solid-sealed polar pole communicates the movable end cavity 6 with the moving contact through hole 12 through the contact heat dissipation channel 24, so that heat in the movable end cavity 6 can be discharged from the moving contact through hole 12 along the contact heat dissipation channel 24, the heat dissipation efficiency in the movable end cavity 6 is improved, and the temperature rise of the solid-sealed polar pole under the natural air cooling condition is effectively reduced.

The second embodiment of the isolated contact seat assembly for the embedded pole is different from the first embodiment described above in that the isolated contact seat comprises a connecting arm connected with the seat body, and the end face of one end of the connecting arm extending into the movable cavity of the movable end is in conductive connection with the movable end through flexible connection.

The third embodiment of the isolated contact base assembly for the embedded pole is different from the first embodiment described above in that a plurality of pole heat dissipation holes are formed in the insulating housing.

The fourth embodiment of the isolated contact base assembly for the embedded pole is different from the first embodiment, the opening of the contact base heat dissipation channel on the conductive connecting base is not over against the hole opening of the connecting base heat dissipation hole, and the direction of the opening of the contact base heat dissipation channel and the direction of the hole opening of the connecting base heat dissipation hole form an included angle with a certain degree.

The fifth specific embodiment of the isolated contact base assembly of the embedded pole is different from the first embodiment described above in that no ventilation groove is arranged in the through hole of the moving contact, and the heat dissipation hole of the contact base is directly arranged on the inner wall of the through hole of the moving contact.

The sixth specific embodiment of the isolated contact base assembly of the embedded pole is different from the first embodiment described above in that the ventilation slot includes a plurality of arc-shaped slots, and the plurality of arc-shaped slots are circumferentially arranged on the inner wall of the through hole of the moving contact.

The seventh embodiment of the isolated contact base assembly of the embedded pole is different from the first embodiment described above in that only a single heat dissipation hole is provided in the contact base.

The eighth specific embodiment of the isolated contact seat assembly of the embedded pole is different from the first embodiment described above in that no finger groove is arranged in the through hole of the moving contact, and the moving contact is directly connected with the seat body in a conductive manner.

In the specific embodiment of the switch cabinet, the switch cabinet comprises the solid-sealed pole isolation contact seat component, the isolation stationary contact seat and the moving contact, the moving contact is in conductive connection with the solid-sealed pole isolation contact seat component, and the moving contact is used for being communicated with the isolation stationary contact seat.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.