CN205231606U - Cubical switchboard main bus -bar room pressure relief device - Google Patents

Abstract

The utility model discloses a pressure relief device for a main busbar room of a switchgear, which comprises a pressure relief channel, a pressure relief hole, a pressure relief cover plate and a ventilation hole. It is the top plate of the switch cabinet. The pressure relief cover is arranged on the top plate of the switch cabinet and covers the pressure relief hole. On the upper part of the circuit breaker chamber, the pressure relief channel communicates with the ventilation hole and the pressure relief hole. The utility model has simple structure and low manufacturing cost, can safely release the high voltage generated by the failure of the main busbar room of the switchgear, ensures the safety of pressure relief, and can effectively solve the pressure relief of the overhead incoming and outgoing lines with a busbar bridge on the top of the main busbar room.

Description

A pressure relief device for the main busbar room of a switchgear

technical field

The utility model relates to the field of power transmission and distribution, in particular to a pressure relief device for a main bus bar room of a switch cabinet.

Background technique

Medium-voltage switchgear is a product widely used in power systems, and it takes on the important role of power control and distribution. In particular, the 3.6-40.5kV armored AC metal-enclosed switchgear is currently the most widely used product in substations and end users. Its reliable operation is directly related to the personal safety of operation and maintenance personnel and the continuity of power supply. Because the current mainstream switchgear is reducing the size and improving the level of protection against electric shock, there is also another danger, that is, when there are various reasons in the switchgear due to the decline of the insulation level of the product and the entry of foreign objects, etc. When a short circuit occurs, the heat energy generated by the arc will cause the gas inside the compartment to expand rapidly to form an explosion, which will damage the equipment and even threaten the personal safety of the personnel on duty. Therefore, according to the national standard and the regulations of the State Grid Corporation, the primary chamber of the switchgear must be equipped with an internal arc fault pressure release channel. When the above situation occurs, the internal pressure of the compartment can be released from a relatively weak place to a safe place.

Under normal circumstances, this is a technical requirement that is easy to meet. Generally, complete switchgear manufacturers set an openable metal cover on the top of the switch cabinet. When an arc fault occurs, the internal high-pressure gas can dissipate the cover The metal cover opens to release the pressure. But when encountering the scheme of busbar room with busbar bridge, the connecting flange of the busbar bridge seat will occupy the space on the top of the switchgear, and the high temperature and high pressure gas in the switchgear cannot be discharged into the busbar bridge. Therefore, there are product non-conformities and potential safety hazards for this kind of scheme at present.

Utility model content

The utility model aims to provide a pressure relief device for the main busbar chamber of a switchgear, which can safely release the pressure of the main busbar chamber when an arc fault occurs when solving the scheme of overhead incoming and outgoing lines with a busbar bridge on the top of the main busbar chamber.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

The utility model discloses a pressure relief device for the main busbar room of a switchgear, which includes an adjacent circuit breaker room and a main busbar room, and also includes a pressure relief channel, a pressure relief hole, a pressure relief cover plate and a ventilation hole. The hole is set on the top of the circuit breaker room, which is the top plate of the switch cabinet, the pressure relief cover is set on the top plate of the switch cabinet and covers the pressure relief hole, and the ventilation hole is set on the circuit breaker room and the main busbar The pressure relief passage is arranged on the upper part of the circuit breaker chamber, and the pressure relief passage communicates with the ventilation hole and the pressure relief hole.

Further, it also includes an instrument room adjacent to the circuit breaker room. The pressure relief channel is an isolation area on the upper part of the circuit breaker room. The pressure relief channel includes a deflector A and a deflector B. The deflector A It is installed on the upper part of the circuit breaker room and divides the upper part of the circuit breaker room into two areas. The upper side of the deflector A is connected to the top of the circuit breaker room, and the adjacent two sides of the upper side of the deflector A are respectively connected to the circuit breaker room and the main busbar room. The partition between the circuit breaker chamber and the instrument room is connected, the deflector B is set at the lower end of the deflector A, and the deflector B and the deflector A connect the two areas on the upper part of the circuit breaker chamber One of the partitions is separated into quarantine.

Further, one side of the pressure relief cover plate is hinged to the top plate of the switch cabinet.

Further, the ventilation hole communicates with the main busbar chamber and the pressure relief channel.

Further, the deflector B is arranged obliquely upward from one end of the partition provided with ventilation holes to an end away from the partition provided with ventilation holes.

Further, the ventilation holes are rectangular holes, circular holes or triangular holes.

Further, the pressure relief hole is a rectangular hole, a circular hole or a triangular hole.

The utility model has the following beneficial effects: the structure is simple, the manufacturing cost is low, and the high voltage generated by the failure of the main busbar room of the switchgear can be safely released to ensure the safety of pressure relief. At the same time, it can effectively solve the solution of the overhead access line with a busbar bridge on the top of the main busbar room. pressure relief.

Description of drawings

Fig. 1 is the partial cross-sectional structure schematic diagram of the utility model;

Figure 2 is a schematic diagram of the assembly of the pressure relief cover;

Figure 3 is a schematic diagram of the structure of the ventilation hole;

Figure 4 is a schematic diagram of the structure of the pressure relief hole.

In the figure: 1-circuit breaker room, 2-main busbar room, 3-instrument room, 4-pressure relief channel, 5-deflector B, 6-deflector A, 7-pressure relief cover, 8-loose leaf , 9-ventilation hole, 10-pressure relief hole, 11-switch cabinet top plate.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, the utility model discloses a pressure relief device for the main busbar room of a switchgear, including a main busbar room 2 and an instrument room 3 adjacent to the circuit breaker room 1, including a pressure relief channel 4, a pressure relief Pressure hole 10, pressure relief cover plate 7 and ventilation hole 9, pressure relief hole 10 is opened on the top of circuit breaker chamber 1, the top of circuit breaker chamber 1 is the top plate 11 of the switch cabinet, and pressure relief cover plate 7 is connected to the top plate of the switch cabinet through hinge 8 11 and covers the pressure relief hole 10, the ventilation hole 9 is set on the upper part of the partition between the circuit breaker room 1 and the main bus room 2, the ventilation hole 9 communicates with the main bus room 2 and the pressure relief channel 4, and the pressure relief channel 4 is set In the upper part of the circuit breaker chamber 1, the pressure relief passage 4 communicates with the ventilation hole 9 and the pressure relief hole 10. The pressure relief passage 4 is an isolation area in the upper part of the circuit breaker chamber 1. The pressure relief passage 4 includes the deflector A6 and the deflector B5. , the deflector A6 is set on the upper part of the circuit breaker chamber 1, and divides the upper part of the circuit breaker chamber 1 into two areas. The partition between the breaker chamber 1 and the main bus chamber 2 is connected with the partition between the circuit breaker chamber 1 and the instrument chamber 3, and the deflector B5 is arranged at the lower end of the deflector A6, and the circuit breaker is connected with the deflector A6. One of the two areas on the upper part of the chamber 4 is divided into an isolated area, and the deflector B5 is arranged obliquely upward from one end of the partition provided with the ventilation holes 9 to one end away from the partition provided with the ventilation holes 9 .

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (7)

1. A pressure relief device for the main busbar chamber of a switchgear, comprising adjacent circuit breaker chambers and the main busbar chamber, characterized in that it includes a pressure relief channel, a pressure relief hole, a pressure relief cover plate and a ventilation hole, and the pressure relief The hole is set on the top of the circuit breaker room, which is the top plate of the switch cabinet, the pressure relief cover is set on the top plate of the switch cabinet and covers the pressure relief hole, and the ventilation hole is set on the circuit breaker room and the main busbar The pressure relief passage is arranged on the upper part of the breaker chamber, and the pressure relief passage communicates with the ventilation hole and the pressure relief hole. 2. The pressure relief device for the main busbar room of the switch cabinet according to claim 1, characterized in that: it also includes an instrument room adjacent to the circuit breaker room, the pressure relief channel is an isolation area on the upper part of the circuit breaker room, and the pressure relief channel is an isolation area on the upper part of the circuit breaker room. The pressure channel includes a deflector A and a deflector B. The deflector A is arranged on the upper part of the circuit breaker chamber and divides the upper part of the circuit breaker chamber into two areas. The upper side of the deflector A is connected to the top of the circuit breaker chamber. The adjacent two sides on the top of the flow plate A are respectively connected with the partition between the circuit breaker room and the main busbar room and the partition between the circuit breaker room and the instrument room, and the flow guide plate B is arranged at the lower end of the flow guide plate A , The deflector B and the deflector A separate one of the two areas on the upper part of the circuit breaker chamber into an isolated area. 3. The pressure relief device for the main busbar room of the switchgear according to claim 1, wherein one side of the pressure relief cover is hinged to the top plate of the switchgear. 4. The pressure relief device for the main busbar chamber of the switchgear according to claim 1, wherein the ventilation hole communicates with the main busbar chamber and the pressure relief passage. 5. The pressure relief device for the main busbar room of the switchgear according to claim 2, characterized in that: the deflector B is obliquely upward from the end connected to the partition with ventilation holes to the end away from the partition with ventilation holes set up. 6. The pressure relief device for the main busbar room of the switchgear according to claim 1, characterized in that: the ventilation hole is a rectangular hole, a circular hole or a triangular hole. 7. The pressure relief device for the main busbar room of the switchgear according to claim 1, wherein the pressure relief hole is a rectangular hole, a circular hole or a triangular hole.