CN-224233208-U - Full-closed gas insulation inflatable cabinet

Abstract

The utility model discloses a fully-closed gas-insulated gas-filled cabinet, and relates to the technical field of power equipment. The utility model comprises an insulating gas-filled cabinet, wherein an SF6 gas recycling machine is arranged at one side of the insulating gas-filled cabinet. According to the utility model, the temperature and pressure change of SF6 gas in the insulating and inflating cabinet is monitored in real time through the temperature sensor and the pressure sensor, the electromagnetic gas self-control valve is combined to control the gas flow direction, the linkage SF6 gas recycling machine realizes closed-loop regulation and control, when the abnormal pressure of the gas caused by thermal expansion is detected, the system automatically starts a gas recycling and cooling program, the pressure and the temperature in the cabinet are rapidly reduced, the problem that a sealing structure is invalid due to overpressure fatigue is avoided, the design of the U-shaped regulating tube and the inclined suction nozzle enables the SF6 gas to form stirring airflow when the SF6 gas is supplemented, the gas density is uniformly distributed, the local insulating weak point is eliminated, and the mechanism remarkably improves the stability of the equipment under the frequent heat load working condition, reduces the gas leakage risk and prolongs the service life of the equipment.

Inventors

• FENG GANGFENG
• FENG HONGGANG
• FAN JIAYI
• DING WENTAO

Assignees

• 广东思东利电力科技有限公司

Dates

Publication Date

20260512

Application Date

20250603

Claims (7)

1. 1. The fully-closed gas-insulated gas-filled cabinet comprises an insulated gas-filled cabinet (1) and is characterized in that an SF6 gas recycling machine (2) is arranged on one side of the insulated gas-filled cabinet (1), an air inlet pipe (3) is communicated with the rear side of the SF6 gas recycling machine (2), and a conveying pipe (4) is communicated with one side of the SF6 gas recycling machine (2); The intelligent air-conditioning system comprises an insulating air-conditioning cabinet (1), a monitoring adjusting component (5), a monitoring block (503) arranged in the insulating air-conditioning cabinet (1), a temperature sensor (504) fixedly connected to one side of the monitoring block (503) and a pressure sensor (505) fixedly connected to one side of the monitoring block (503), wherein the monitoring adjusting component (5) comprises an adjusting pipe (501) fixedly connected to the inside of the insulating air-conditioning cabinet (1), and a suction nozzle (502) communicated to the surface of the adjusting pipe (501); The surface of the monitoring block (503) is provided with a sealing assembly (6), the sealing assembly (6) comprises a first sealing strip (601) arranged inside the insulating air charging cabinet (1), a second sealing strip (602) fixedly connected to the surface of the monitoring block (503), and a sealing plate (603) fixedly connected to one side of the monitoring block (503).
2. 2. The fully-closed gas insulated gas-filled cabinet according to claim 1, wherein the top of the regulating pipe (501) is communicated with the gas inlet pipe (3), and electromagnetic gas self-control valves (7) are respectively communicated with the surfaces of the gas inlet pipe (3), the conveying pipe (4) and the regulating pipe (501).
3. 3. A fully-closed gas insulated switchgear according to claim 1, wherein the regulating pipe (501) is U-shaped, and the suction nozzles (502) are two rows of surfaces which are longitudinally inclined and uniformly communicated with opposite sides of the regulating pipe (501), and the inclination direction is toward the left and right.
4. 4. The fully-closed gas-insulated gas-filled cabinet according to claim 1, wherein the monitoring block (503) is located at one side of the inside of the insulated gas-filled cabinet (1) and fixedly connected with extension rods (8), the number of the extension rods (8) is two, the temperature sensor (504) is fixedly connected with one end of the top extension rod (8) far away from the monitoring block (503), the surface of the temperature sensor (504) is sleeved with an aluminum alloy protective cover (9), the aluminum alloy protective cover (9) is fixedly connected with the extension rod (8), the pressure sensor (505) is fixedly connected with one end of the bottom extension rod (8) far away from the monitoring block (503), and the model of the pressure sensor (505) is a cross river EJX-a.
5. 5. The fully-closed gas-insulated gas-filled cabinet according to claim 1, wherein a first sealing groove is formed in the insulating gas-filled cabinet (1), and the first sealing strip (601) is fixedly connected in the first sealing groove.
6. 6. The fully-closed gas-insulated gas-filled cabinet according to claim 1, wherein a second sealing groove is formed in the surface of the monitoring block (503), the second sealing strip (602) is fixedly connected in the second sealing groove, the second sealing strip (602) is located inside the gas-filled cabinet (1), and the material of the second sealing strip (602) is a fluororubber expansion sealing strip.
7. 7. A fully enclosed gas insulated switchgear according to claim 1, wherein, the insulating gas-filled cabinet (1) and the inside fixed through-hole that has all been seted up of closing plate (603), fixed through-hole inside threaded connection has fixing bolt.

Description

Full-closed gas insulation inflatable cabinet Technical Field The utility model belongs to the technical field of power equipment, and particularly relates to a fully-closed gas-insulated gas-filled cabinet. Background With the development of the power system to the high voltage and the compact direction, the fully-closed gas insulated gas-filled cabinet is widely applied to the fields of substations, urban power grids and the like due to the advantages of compact structure, strong environmental adaptability and the like, and SF6 gas is a preferred medium of gas insulated equipment by virtue of excellent insulating performance and arc extinguishing capability as a core insulating medium. However, during actual operation, a large amount of heat is generated by the power elements (such as a circuit breaker and a disconnecting switch) in the gas-filled cabinet during on-off operation or short circuit fault, so that the temperature of SF6 gas in the closed cavity is increased and the volume is expanded, and the internal pressure is obviously increased. The traditional gas-filled cabinet has the technical defects that the traditional gas-filled cabinet is lack of a dynamic monitoring and self-adaptive adjusting mechanism, the traditional equipment is dependent on a safety valve with a fixed pressure threshold value for passive pressure relief, the dynamic change relation between the gas temperature and the pressure cannot be monitored in real time, so that under the frequent heat load working condition, the pressure fluctuation easily exceeds a design margin, fatigue failure of a sealing structure and even gas leakage are caused, SF6 gas is taken as strong greenhouse gas, the leakage not only affects the insulating performance of the equipment, but also causes serious environmental problems, the uneven gas distribution and the low recovery efficiency are caused, the conventional gas-filled cabinet is supplemented by adopting a one-way straight-through pipeline, laminar flow is easily formed when SF6 gas is injected, the uniform diffusion is difficult, and the poor gas density of a local area possibly causes an insulating weak point. For this purpose, we provide a fully-closed gas insulated gas-filled cabinet to solve the above problems. Disclosure of utility model The utility model aims to provide a fully-closed gas-insulated gas-filled cabinet, which solves the problems that equipment in the prior art relies on a safety valve with a fixed pressure threshold value to perform passive pressure relief, the dynamic change relation of gas temperature and pressure cannot be monitored in real time, the gas supplementation of the gas-filled cabinet adopts a one-way straight-through pipeline, and SF6 gas is easy to form laminar flow and difficult to uniformly diffuse when being injected through the cooperation of a monitoring and adjusting component and a sealing component. In order to solve the technical problems, the utility model is realized by the following technical scheme: The utility model relates to a fully-closed gas-insulated gas-filled cabinet, which comprises an insulated gas-filled cabinet, wherein an SF6 gas recycling machine is arranged on one side of the insulated gas-filled cabinet, an air inlet pipe is communicated with the rear side of the SF6 gas recycling machine, a conveying pipe is communicated with one side of the SF6 gas recycling machine, a monitoring and adjusting assembly is arranged in the insulated gas-filled cabinet, the monitoring and adjusting assembly comprises an adjusting pipe fixedly connected in the insulated gas-filled cabinet, a suction nozzle communicated with the surface of the adjusting pipe, a monitoring block arranged in the insulated gas-filled cabinet, a temperature sensor fixedly connected to one side of the monitoring block, and a pressure sensor fixedly connected to one side of the monitoring block, and the surface of the monitoring block is provided with a sealing assembly, and the sealing assembly comprises a first sealing strip arranged in the insulated gas-filled cabinet, a second sealing strip fixedly connected to the surface of the monitoring block, and a sealing plate fixedly connected to one side of the monitoring block. The utility model is further arranged that the top of the adjusting pipe is communicated with the air inlet pipe, and electromagnetic gas self-control valves are communicated with the surfaces of the air inlet pipe, the conveying pipe and the adjusting pipe. The utility model is further characterized in that the regulating tube is U-shaped, the suction nozzles are two rows of surfaces which are longitudinally inclined and uniformly communicated with the opposite sides of the regulating tube, and the inclined directions are towards left and right. The utility model is further characterized in that one side of the monitoring block, which is positioned in the insulating and inflating cabinet, is fixedly connected with two extension rods, the temperat