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Switch cabinet and switch cabinet installation method

A switchgear and cabinet technology, applied in the field of switchgear and switchgear installation, can solve the problems of destroying the sealing of compartments, easily damaging surrounding items, and bursting the switchgear, so as to enhance safety performance and reliability, and enhance sealing. and strength, the effect of promoting the discharge of high-pressure gas

Pending Publication Date: 2021-08-27
江苏华彤电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the operation of the switchgear, short-circuit faults will occur due to short-circuit, insulation aging, human error and other reasons. Under the short-circuit current of tens of thousands of amperes, the switchgear will generate internal arcing in an instant, and the arcing fault will form high-temperature and high-pressure gas. , if the high-temperature and high-pressure gas cannot be effectively released in a very short time in a narrow cabinet, the gas expansion will destroy the sealing of the compartment and the bursting of the switch cabinet, which will damage the adjacent switch cabinet, cause a series of accidents, and reduce the power system. Safety performance and reliability; Patent No. CN109524913A discloses: "Switch cabinet pressure relief device and switch cabinet", the pressure relief channel is provided with a spoiler for changing the direction of the arcing air flow to consume the energy of the arcing air flow, in order to solve the existing There is a problem that the equipment near the switchgear is damaged when the airflow from the pressure relief port is too large when the cabinet body of the switchgear in the technology is short-circuited and exploded; and for example, Patent No. CN109638664 A discloses: "Switchgear Pressure Relief Device and Switchgear" , the arc suppression structure is provided in the pressure relief channel, and the arc suppression structure includes baffles arranged in layers along the axis of the pressure relief channel, and the baffles of each layer are arranged at intervals, and the adjacent two layers of baffles The directions are staggered and there are overlapping parts along the axis of the pressure relief channel, which solves the problem that the existing pressure relief device cannot effectively protect the arc, and the arc is easy to damage the surrounding objects or injure the personal safety after the arc is ejected. Under high temperature and high pressure conditions, broken fragments will be produced, which will be ejected out of the switch cabinet at high speed under the action of high pressure airflow, which may cause damage to the external environment and make it difficult to ensure personal safety. Leakage and communication occur, and its strength and sealing are poor. The arc enters the adjacent compartment and causes the overall damage of the switchgear, and its safety performance and reliability are low.

Method used

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  • Switch cabinet and switch cabinet installation method
  • Switch cabinet and switch cabinet installation method
  • Switch cabinet and switch cabinet installation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see figure 1 , the present embodiment provides a switchgear, including a cabinet body 1, the cabinet body 1 is provided with a prefabricated partition 120 arranged horizontally, and the upper and lower ends of the prefabricated partition 120 are respectively installed with a first isolation board 130 and a second isolation board 140 , the prefabricated partition 120, the first partition 130 and the second partition 140 divide the inner cavity of the cabinet body 1 into four independent compartment units 200;

[0039] A pressure relief device 300 is installed inside the cabinet body 1, and the pressure relief device 300 includes a pressure relief interface 310 arranged on each compartment unit 200, a pressure relief door 320 arranged at the inlet end of the pressure relief interface 310, and a relief valve for upward flow diversion. The pressure relief channel 330, the pressure relief interface 310 realizes the communication / closure of the compartment unit 200 and the pr...

Embodiment 2

[0050] Based on the above examples, please refer to image 3 and Figure 4 The pressure relief door 320 includes a blocking plate 321, a rotating shaft 322, and a torsion spring 323 that pre-tightens and seals the blocking plate 321 and fits the inlet end of the pressure relief interface 310. The blocking plate 321 is fixedly connected to the rotating shaft 322, and the torsion spring 323 is symmetrically arranged on At the two ends of the shaft 322, the torsion spring 323 provides the pre-tightening force for the sealing plate 321 to fit the pressure relief port 310. When the aeration high pressure occurs in the compartment unit 200, the air pressure force is greater than the pre-tightening force provided by the torsion spring 323 When the threshold is reached, the pressure relief door 320 is opened, and the compartment unit 200 communicates with the pressure relief channel 330 .

Embodiment 3

[0052] Based on the above examples, please refer to Figure 7 and Figure 8 The high-strength wire mesh 117 is installed on the bottom end surface of the splitter 116. The splitter 116 is provided with a central hole 116-1 and annularly distributed through holes 116-2. The pressure relief window 111 is provided with a pressure relief channel 330 for sealing connection. The first air guide section 111-1 and the second air guide section 111-2 arranged at the bottom of the high-strength wire mesh 117, the cross-sectional area of ​​the second air guide section 111-2 is larger than that of the first air guide section 111-1 area, according to the Venturi effect, aeration occurs in the compartment unit 200, after the compartment unit 200 is connected with the pressure relief channel 330, the air pressure of the second air guide section 111-2 is lower than the air pressure of the first air guide section 111-1, It is beneficial to guide the air upward, and optimize the structural desi...

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Abstract

The invention relates to a switch cabinet and a switch cabinet installation method.The switch cabinet comprises a cabinet body, a prefabricated partition plate is arranged in the cabinet body, a first partition plate and a second partition plate are installed at the upper end and the lower end of the prefabricated partition plate respectively, and an inner cavity of the cabinet body is divided into four independent compartment units by the prefabricated partition plate, the first partition plate and the second partition plate; and a pressure relief device is installed in the cabinet body and comprises pressure relief connectors, pressure relief doors and pressure relief channels which are arranged on the compartment units, the pressure relief connectors achieve communication / closing of the compartment units and the pressure relief channels through opening / closing of the pressure relief doors, and the upper end of the cabinet body is connected with a combined cover plate. The combined cover plate comprises a pressure relief window communicating with the pressure relief channel and an end cover plate, and a splitter and a high-strength silk screen are slidably connected to the inner side wall of the pressure relief window. The safety performance and reliability of the switch cabinet can be effectively enhanced, and the compartment units have the advantages of being high in strength and high in sealing performance.

Description

technical field [0001] The invention relates to the technical field of power system equipment, in particular to a switch cabinet and a switch cabinet installation method. Background technique [0002] Switchgear refers to the role of on-off, control or protection in power system generation, transmission, distribution, power conversion and consumption. The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices. According to different cabinet structures, switchgear can be divided into open switchgear, metal-enclosed switchgear and metal-enclosed armored switchgear. [0003] During the operation of the switchgear, short-circuit faults will occur due to short-circuit, insulation aging, human error and other reasons. Under the short-circuit current of tens of thousands of amperes, the switchgear will generate internal arcing in an instant, and the arcing fault will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B13/025H02B1/28H02B1/30H02B1/32H02B1/36H02B3/00
CPCH02B13/025H02B1/28H02B1/30H02B1/32H02B1/36H02B3/00
Inventor 赵晨赵义平
Owner 江苏华彤电气股份有限公司