Vacuum circuit breaker with built-in heat dissipation function and external ventilation condition and switch cabinet handcart chamber

Abstract

The utility model provides a vacuum circuit breaker with a built-in heat dissipation function and a peripheral ventilation condition. According to the technical scheme provided by the utility model, each assembly of the primary loop of the vacuum circuit breaker is provided with a passive heat dissipation structure, and the circuit breaker is provided with an external active heat dissipation structure, so that heat accumulation in the circuit breaker in a working state can be greatly reduced; compared with the prior art, the technical scheme provided by the utility model can solve the following problems: (1) the connection part of the tulip contact and the contact arm in a working state is severely heated and is burnt, melted and bonded, so that the tulip contact and the contact arm are difficult to separate, and the later maintenance difficulty is increased; and (2) the embedded pole in the prior art is not provided with a heat dissipation channel, so that an insulating layer is heated and aged due to heat accumulation in the embedded pole in a working state, and the service life of the vacuum circuit breaker is greatly shortened.

Description

Technical Field

[0001] This utility model belongs to the field of medium-voltage switch technology, specifically relating to a vacuum circuit breaker and switch cabinet handcart compartment with built-in heat dissipation function and external ventilation conditions. Background Technology

[0002] In the field of medium and high voltage power transmission and distribution, switchgear is widely used, and circuit breakers are important switching components within it. As a crucial element of switchgear, circuit breakers control the switching on and off of high-voltage systems and are vital control and protection devices. Vacuum circuit breakers are suitable for frequent operation at rated operating current or for applications requiring multiple short-circuit current interruptions. In recent years, the continuous increase in power system capacity has led to a corresponding increase in the current-carrying capacity requirements of vacuum circuit breakers. Existing indoor high-voltage vacuum circuit breakers suffer from poor heat dissipation. Under high rated current conditions, the circuit breaker generates a large amount of heat during operation, causing a rapid rise in temperature, particularly inside the insulating casing, and accelerating insulation aging. This, in turn, affects the long-term safety and reliability of the circuit breaker.

[0003] Vacuum circuit breakers typically use fully enclosed, heat-dissipating, channelless solid-sealed poles and cylindrical copper tube contact arms. However, under conditions of high rated current, it is difficult to dissipate heat quickly and ensure the internal temperature rise of the circuit breaker. Patent CN108807069A discloses an indoor high-voltage vacuum circuit breaker with good heat dissipation. However, the existing technology has the following shortcomings: (1) Since the solid-sealed poles of the existing technology have no heat dissipation channels, the heat accumulation inside the solid-sealed poles during operation will cause the insulation layer to age due to heat, which will greatly shorten the service life of the vacuum circuit breaker; (2) During operation, the connection between the plum blossom contact and the contact arm will generate severe heat and produce melting and adhesion, which will make it difficult to separate the plum blossom contact and the contact arm, increasing the difficulty of later maintenance. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a vacuum circuit breaker with built-in heat dissipation and external ventilation. Based on the working mode and application scenario, it also provides a switchgear compartment in which the vacuum circuit breaker is installed. The specific technical solution is as follows:

[0005] A vacuum circuit breaker with built-in heat dissipation and external ventilation features, the vacuum circuit breaker comprising a sprite-shaped contact, a contact arm, and a solid-sealed pole.

[0006] The solid-sealed electrode post is provided with two interfaces, one at the top and one at the bottom, which are installed in conjunction with the contact arm; a heat dissipation channel for the solid-sealed electrode post is provided on the back; the contact arm is provided with an interface for installation in conjunction with the plum blossom contact.

[0007] The plum blossom contact is installed at the contact arm interface; the contact arms (upper contact arm and lower contact arm) are sequentially installed at the interface of the upper and lower contact arms of the solid-sealed pole.

[0008] Preferably, the contact arms (upper contact arm and lower contact arm) are fixedly installed at the contact arm interface of the solid-sealed pole by screws.

[0009] Preferably, the heat sink is fixedly installed at the top interface of the solidified pole by screws.

[0010] Preferably, the contact arm is provided with vertically arranged contact arm heat dissipation grooves.

[0011] Preferably, the vacuum circuit breaker further includes a heat sink, and the top of the solid-sealed pole is provided with an interface that cooperates with the heat sink for installation. The heat sink is installed at the interface at the top of the solid-sealed pole.

[0012] A switchgear truck compartment, the switchgear truck compartment further includes a vacuum circuit breaker frame, a chassis, and a truck compartment chassis;

[0013] The vacuum circuit breaker frame is provided with a platform that mates with the bottom of the solid-sealed pole of the vacuum circuit breaker; the chassis is provided with a top surface that mates with the bottom of the vacuum circuit breaker frame; the bottom of the chassis is provided with chassis floor ventilation holes; the top surface of the handcart chassis is provided with a workstation adapted to the chassis; the handcart chassis is provided with handcart chassis ventilation openings;

[0014] The bottom of the solid-sealed pole of the vacuum circuit breaker is installed on the top surface of the vacuum circuit breaker frame platform; the vacuum circuit breaker frame is installed on the top surface of the chassis vehicle; the chassis vehicle is installed at the work position of the switchgear truck compartment; the ventilation holes of the chassis vehicle bottom plate are installed in conjunction with the ventilation openings of the truck compartment chassis.

[0015] Preferably, the switchgear truck compartment is also equipped with a truck compartment fan; the truck compartment chassis bottom surface is provided with a truck compartment fan; the truck-type fan is installed in conjunction with the ventilation holes of the chassis floor plate and the ventilation openings of the truck compartment chassis.

[0016] The workstations adapted to the chassis vehicle include test workstations for debugging processes and work workstations for operational processes.

[0017] Beneficial effects

[0018] This utility model provides a vacuum circuit breaker with built-in heat dissipation and external ventilation. The technical solution provided by this utility model, by setting a passive heat dissipation structure for each component of the primary circuit of the vacuum circuit breaker and setting an external active heat dissipation structure for the circuit breaker, can greatly reduce the heat accumulation inside the circuit breaker during operation. Compared with the prior art, the technical solution provided by this utility model can solve the following problems:

[0019] (1) During operation, the connection between the plum blossom contact and the contact arm gets very hot and melts and sticks together, making it difficult to separate the plum blossom contact and the contact arm, which increases the difficulty of later maintenance.

[0020] (2) Since the existing solid-sealed pole has no heat dissipation channel, the heat accumulation inside the solid-sealed pole during operation will cause the insulation layer to age due to heat, which will greatly shorten the service life of the vacuum circuit breaker. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of a vacuum circuit breaker with built-in heat dissipation function and external ventilation conditions provided by this utility model;

[0022] Figure 2 This is a cross-sectional view of the left view of a vacuum circuit breaker with built-in heat dissipation function and external ventilation conditions provided by this utility model.

[0023] Figure 3 This is a schematic diagram of the heat dissipation groove of the contact arm of a vacuum circuit breaker with built-in heat dissipation function and external ventilation conditions provided by this utility model.

[0024] Figure 4 This is a top-down view of the chassis.

[0025] Figure 5 This is a schematic diagram of a solid-sealed pole heat dissipation channel for a vacuum circuit breaker with built-in heat dissipation function and external ventilation conditions provided by this utility model.

[0026] Figure 6 This is a schematic diagram of a vacuum circuit breaker with built-in heat dissipation and external ventilation, a vacuum circuit breaker frame, and a chassis trolley assembled in the working position of the switch cabinet truck compartment, provided by this utility model.

[0027] The diagram is labeled as follows:

[0028] 1. Vacuum circuit breaker frame,

[0029] 2. Plum blossom contact points

[0030] 3 tentacles,

[0031] 4 heat sinks,

[0032] 5. Solid-sealed poles

[0033] 6 chassis vehicle,

[0034] 7-arm heat dissipation slots

[0035] 8. Chassis floor ventilation holes

[0036] 9 solid-sealed electrode heat dissipation channels

[0037] Ventilation holes in the floor of the 10-hand car compartment.

[0038] 11. Handcart compartment fan,

[0039] 12 Switchgear Handcart Room. Detailed Implementation

[0040] Example

[0041] Combination Figures 1-6 The structure and working principle of the technical solution provided by this utility model are described.

[0042] This utility model provides a vacuum circuit breaker with built-in heat dissipation function and external ventilation conditions. The vacuum circuit breaker includes a plum blossom contact 2, a contact arm 3, a heat dissipation frame 4, and a solid-sealed pole 5.

[0043] The plum blossom contact 2 is located at the interface of the contact arm 3. When the vacuum circuit breaker is in working condition, the current enters the internal circuit of the vacuum circuit breaker through the plum blossom contact 2.

[0044] The contact arms 3 (upper contact arm and lower contact arm) are sequentially arranged at the connection between the upper and lower contact arms 3 of the solid-sealing pole post 5; preferably, the contact arms 3 (upper contact arm and lower contact arm) are fixedly installed at the connection between the upper and lower contact arms 3 of the solid-sealing pole post 5 by screws; the contact arms 3 (upper contact arm and lower contact arm) are provided with contact arm heat dissipation grooves 7 arranged vertically.

[0045] The heat sink 4 is disposed on the top of the solidified electrode post 5; preferably, the heat sink 4 is fixedly installed on the top of the solidified electrode post 5 by screws.

[0046] The solid-sealed pole 5 is provided with two contact ports at the top and bottom that are installed in conjunction with the contact arm 3, an interface at the top that is installed in conjunction with the heat sink, and a heat dissipation channel 9 at the back.

[0047] The vacuum circuit breaker frame 1 is provided with a platform that can be installed in conjunction with the bottom of the solid-sealed pole 5 of the vacuum circuit breaker; the bottom of the solid-sealed pole 5 of the vacuum circuit breaker is installed on the top surface of the platform of the vacuum circuit breaker frame 1, and the platform of the vacuum circuit breaker frame 1 can be installed in conjunction with the bottom of the solid-sealed pole 5 of the vacuum circuit breaker.

[0048] The chassis 6 is provided with a top surface that can be used to mate with the bottom of the vacuum circuit breaker frame 1 for installation; the vacuum circuit breaker frame 1 is provided on the top surface of the chassis 6, and the top of the chassis 6 can mate with the bottom of the vacuum circuit breaker frame 1 for installation.

[0049] The chassis 6 is located at the workstation of the switch cabinet handcart compartment 12 (a test workstation for the debugging process and a work workstation for the working process); the bottom of the chassis 6 is provided with chassis floor ventilation holes 8;

[0050] The switchgear truck compartment 12 is provided with a test station for the debugging process and a work station for the working process; the bottom plate of the switchgear truck compartment 12 is provided with a truck compartment bottom plate ventilation hole 10, and the switchgear truck compartment 12 is provided with a truck compartment fan 11 that cooperates with the truck compartment bottom plate ventilation hole 10 and the chassis truck bottom plate ventilation hole 8 for ventilation.

[0051] When the chassis 6 is fixedly installed in the working position of the switch cabinet truck compartment 12, the truck compartment fan 11 can actively dissipate heat for the vacuum circuit breaker, the vacuum circuit breaker frame 1, and the chassis 6 through the ventilation holes 10 on the truck compartment floor and the ventilation holes 8 on the chassis floor.

[0052] The working principle of a vacuum circuit breaker with built-in heat dissipation and external ventilation provided by this utility model will be explained below.

[0053] The switchgear truck compartment 12 has both commissioning and operating procedures. When the switchgear truck compartment 12 is in the test position, the bottom of the vacuum circuit breaker with built-in heat dissipation and external ventilation provided by this utility model is adjusted in conjunction with the platform of the vacuum circuit breaker frame 1.

[0054] Then the vacuum circuit breaker frame 1 is fitted and installed on the top of the chassis vehicle 6.

[0055] The chassis 6 is installed inside the switch cabinet truck compartment 12, and the chassis 6 can be adjusted between the test station and the working station;

[0056] When the chassis vehicle 6 is in the assembly station, the vacuum circuit breaker and the vacuum circuit breaker frame 1 are installed on the chassis vehicle 6, and then the chassis vehicle 6 is adjusted to the working station and fixed.

[0057] After the circuit breaker, circuit breaker frame, and chassis 6 have been debugged, the switchgear truck compartment 12 is changed from the test position to the working position. Once the switchgear truck compartment 12 is in the working position, the current entering the circuit breaker from the sprite contact 2 generates a large amount of heat. Because each component of the primary circuit of the vacuum circuit breaker provided by this invention has a dedicated heat dissipation structure for passive heat dissipation (sprite contact 2, contact arm heat dissipation groove 7 surrounding the contact arm 3, heat dissipation rack 4 on the top of the solidified pole 5, and solidified pole heat dissipation channel 9 on the back of the solidified pole 5), and the chassis 6 has ventilation holes 8 on the bottom plate, these ventilation holes 10 on the truck compartment floor form a heat dissipation channel, allowing for active heat dissipation through the external truck compartment fan 12.

[0058] The technical solution provided by this utility model, by setting a passive heat dissipation structure for each component of the primary circuit of the vacuum circuit breaker and setting an external active heat dissipation structure for the circuit breaker, can greatly reduce the heat accumulation inside the circuit breaker during operation; compared with the prior art, the technical solution provided by this utility model can solve the following problems:

[0059] (1) During operation, the connection between the plum blossom contact 2 and the contact arm 3 is severely heated and melted and bonded, which makes it difficult to separate the plum blossom contact 2 and the contact arm 3, increasing the difficulty of later maintenance.

[0060] (2) Since the solid-sealed pole 5 of the existing technology has no heat dissipation channel, the heat accumulation inside the solid-sealed pole 5 during operation will cause the insulation layer to age due to heat, which will greatly shorten the service life of the vacuum circuit breaker.

Claims

1. A vacuum circuit breaker with built-in heat dissipation function and external ventilation conditions, characterized in that, The vacuum circuit breaker includes a sprite-shaped contact, a contact arm, and a solid-sealed pole. The solid-sealed electrode post is provided with two interfaces, one at the top and one at the bottom, which are installed in conjunction with the contact arm; a heat dissipation channel for the solid-sealed electrode post is provided on the back; the contact arm is provided with an interface for installation in conjunction with the plum blossom contact. The plum blossom contact is installed at the contact arm interface; the contact arms are sequentially installed at the interfaces of the upper and lower contact arms of the solid-sealed pole.

2. The vacuum circuit breaker as described in claim 1, characterized in that, The contact arm is provided with heat dissipation grooves arranged vertically.

3. The vacuum circuit breaker as described in claim 1, characterized in that, The vacuum circuit breaker also includes a heat sink bracket, and the top of the solid-sealed pole is provided with an interface that cooperates with the heat sink bracket for installation. The heat sink bracket is installed at the interface on the top of the solid-sealed pole.

4. The vacuum circuit breaker as described in claim 1, characterized in that, The contact arm is fixedly installed at the contact arm interface of the solid-sealed pole by screws.

5. The vacuum circuit breaker as described in claim 1, characterized in that, The vacuum circuit breaker also includes a heat sink, which is fixedly installed at the top interface of the solid-sealed pole by screws.

6. A switchgear compartment equipped with a vacuum circuit breaker as described in any one of claims 1 to 5, characterized in that, The switchgear truck compartment also includes a vacuum circuit breaker frame, a chassis, and a truck compartment chassis; The vacuum circuit breaker frame is provided with a platform that mates with the bottom of the solid-sealed pole of the vacuum circuit breaker; the chassis is provided with a top surface that mates with the bottom of the vacuum circuit breaker frame; the bottom of the chassis is provided with chassis floor ventilation holes; the top surface of the handcart chassis is provided with a workstation adapted to the chassis; the handcart chassis is provided with a handcart-type chassis ventilation opening; The bottom of the solid-sealed pole of the vacuum circuit breaker is installed on the top surface of the vacuum circuit breaker frame platform; the vacuum circuit breaker frame is installed on the top surface of the chassis vehicle; the chassis vehicle is installed at the work position of the switchgear truck compartment; the ventilation holes of the chassis vehicle bottom plate are installed in conjunction with the ventilation openings of the truck compartment chassis.

7. The switchgear truck compartment as described in claim 6, characterized in that, The switchgear truck compartment is also equipped with a truck compartment fan; the truck compartment chassis bottom surface is equipped with a truck compartment fan; the truck compartment fan is installed in conjunction with the ventilation holes on the chassis floor and the truck chassis ventilation openings.

8. The switchgear truck compartment as described in claim 6, characterized in that, The workstations adapted to the chassis vehicle include test workstations for debugging processes and work workstations for operational processes.

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