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CN-122026245-A - Indoor high-voltage switch cabinet

CN122026245ACN 122026245 ACN122026245 ACN 122026245ACN-122026245-A

Abstract

The invention discloses an indoor high-voltage switch cabinet, which belongs to the technical field of high-voltage switch cabinets and comprises a switch cabinet main body and a detection feedback assembly, wherein in the scheme, a first mode can ensure that the change of the concentration of carbon monoxide in an air chamber only corresponds to the ageing increment of an insulating material, early and accurate diagnosis of corrosion rate is realized, scientific basis is provided for predictive maintenance, a second mode can actively dilute and reduce the concentration of harmful impurities in the air chamber, delay the degradation of an insulating system from the source, realize the transition from passive response to active health management, and meanwhile, a display assembly in the scheme forms high-reliability safety redundancy, can reliably indicate whether the air chamber is in voltage loss and electrification under the extreme condition of complete power failure of equipment, avoids major operation risks, can accurately control the air supplementing pressure and ensure visual instruments for safe power transmission in daily maintenance, and greatly improves the operation safety and operation reliability of the whole life cycle of the equipment.

Inventors

  • WANG GANG
  • JIN ZHENPING

Assignees

  • 湘潭国尔电器有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. An indoor high-voltage switch cabinet, characterized by comprising: A switch cabinet main body (1) provided with a plurality of independent air chambers (11) isolated from each other, wherein each air chamber (11) is filled with insulating protective gas; the detection feedback assembly (2) is arranged on the switch cabinet main body (1) and is used for sampling, detecting and feeding back the gas state in the gas chamber (11), and the detection feedback assembly (2) comprises: the sampling pipeline (3) is communicated with the inside of the air chamber (11); the display component (4) is connected with the sampling pipeline (3) and is used for feeding back the state of the air chamber; a detection chamber (5) provided with a gas sensor and a micropump inside and communicated with the display assembly (4) through a flow-through pipeline (51); The air supplementing assembly is used for supplementing insulating protective gas to the air chamber (11); The micro pump is used for pumping the gas in the gas chamber (11) and entering the detection chamber (5) for detection.
  2. 2. An indoor high voltage switchgear as in claim 1, characterized in that the sampling pipe (3) is placed on the upper side of the air chamber (11).
  3. 3. An indoor high voltage switchgear as claimed in claim 1, characterized in that a release ring (6) is slidably arranged in the sampling pipe (3), the release ring (6) being connected to a release bracket (32) fixed in the sampling pipe (3) by means of a reset bar (33).
  4. 4. A high-voltage indoor switch cabinet as claimed in claim 3, characterized in that the outside of the return strip (33) is covered with a protective sleeve made of anti-corrosion elastic material.
  5. 5. An indoor high-voltage switch cabinet as claimed in claim 3, characterized in that the release ring (6) is internally provided with a squeezing groove (62), a squeezing bracket (63) is arranged in the squeezing groove (62), and a rigid sliding sleeve (64) is connected on the squeezing bracket (63) in a sliding way.
  6. 6. An indoor high-voltage switch cabinet as claimed in claim 5, characterized in that the rigid sliding sleeve (64) is externally provided with an elastic sealing sleeve (65), and the elastic sealing sleeve (65) is abutted against the inner wall of the extrusion groove (62).
  7. 7. An indoor high-voltage switch cabinet according to claim 3, characterized in that an auxiliary ring (7) is fixedly arranged in the sampling pipeline (3), a plurality of extrusion sleeves (71) are arranged on the auxiliary ring (7), electromagnets are arranged in the auxiliary ring (7), and magnetic blocks (61) matched with the electromagnets are arranged in the release ring (6).
  8. 8. A high-voltage indoor switch cabinet according to claim 3, characterized in that the display assembly (4) comprises a detection pipeline (41) and a display pipe (42), the flow pipeline (51) is communicated with the bottom end of the detection pipeline (41), and the display pipe (42) is arranged outside the switch cabinet main body (1) and is transparent in material.
  9. 9. An indoor high-voltage switch cabinet as claimed in claim 8, characterized in that one end of said release ring (6) is connected with an indication rod (43), said display tube (42) is embedded with a sliding sealing ring (44), said indication rod (43) is in sliding sealing fit with said sliding sealing ring (44) for displacement in said display tube (42).
  10. 10. An indoor high-voltage switch cabinet according to claim 1, characterized in that the detection chamber (5) is further connected with a discharge pipe (52), the discharge pipe (52) is externally connected with a low-voltage buffer recovery bag or a return pipe, and the return pipe is communicated with the air chamber (11).

Description

Indoor high-voltage switch cabinet Technical Field The invention relates to the technical field of high-voltage switch cabinets, in particular to an indoor high-voltage switch cabinet. Background The indoor high-voltage switch cabinet is a core complete equipment in a power distribution network, is mainly used for receiving and distributing electric energy, and controlling, protecting and monitoring a circuit, is usually installed in a power distribution room of a transformer substation, an industrial and mining enterprise and a large building, and according to different insulating mediums and structures, the main stream type comprises an armored movable switch cabinet (such as KYN28A-12 series) taking air as a main insulating medium, and a compact gas-insulated switch cabinet (C-GIS, commonly called an 'inflatable cabinet') adopting SF 6 and the like for gas insulation, namely, a bus, a circuit breaker and the like are sealed in a metal shell filled with insulating gas with specific pressure (such as pure SF 6 or SF 6/N2 mixed gas), so that extremely high insulating performance, compact structural size and excellent environmental tolerance are realized. However, when the circuit breaker breaks a strong short-circuit current to generate a high-temperature arc, or when a local severe overheat is caused by poor contact in the equipment, SF 6 gas is decomposed to generate byproducts such as sulfur fluoride (such as SOF 2、SO2F2) and metal fluoride, and the decomposition products have corrosiveness and toxicity and can erode epoxy resin insulators (such as basin insulators) in the air chamber for a long time and cumulatively, so that serious faults such as creeping discharge and the like can be caused, and meanwhile, the decomposition products themselves pollute the protective gas to reduce the insulation and arc extinguishing performance of the protective gas, so that a continuously deteriorated cycle is formed. The method mainly comprises the following steps of firstly, lacking a high-efficiency, online and completely non-destructive means for the main seal of an air chamber to accurately monitor the corrosion state of the latent insulating material, wherein the latent insulating material can be usually detected off-line only after power failure, and can not realize early warning, secondly, lacking a preventive maintenance method capable of actively intervening and delaying the degradation of a gas medium, and passively waiting for the degradation of the gas performance, and thirdly, the existing monitoring scheme relying on an electronic sensor is completely failed in the failure state of complete power failure of equipment, and can not provide reliable and visual pressure indication for key maintenance operations such as daily air supply and the like, and has operation risks and dead zones. Disclosure of Invention The invention provides an indoor high-voltage switch cabinet, which can solve the problems that the prior art lacks an efficient on-line insulation corrosion monitoring means without damaging sealing, lacks a preventive maintenance method for actively delaying the degradation of a gas medium, depends on an electronic monitoring and indicating scheme to fail when power is off, and cannot provide visual and safe guidance for key maintenance operation. The indoor high-voltage switch cabinet comprises a switch cabinet body, a detection feedback assembly and a gas supplementing assembly, wherein a plurality of independent air chambers which are isolated from each other are arranged in the switch cabinet body, each air chamber is filled with insulating protective gas, the detection feedback assembly is arranged on the switch cabinet body and used for sampling, detecting and feeding back the gas state in the air chamber, the detection feedback assembly comprises a sampling pipeline which is communicated with the inside of the air chamber, a display assembly which is connected with the sampling pipeline and used for feeding back the state of the air chamber, a gas sensor and a micro pump are arranged in the detection chamber and are communicated with the display assembly through a flow pipeline, and the gas supplementing assembly is used for supplementing the insulating protective gas to the air chamber, and is used for extracting the gas in the air chamber to enter the detection chamber for detection. Preferably, the sampling pipe is disposed at an upper side of the air chamber. Preferably, a release ring is slidably arranged in the sampling pipe, and the release ring is connected with a release bracket fixed in the sampling pipe through a reset bar. Preferably, the outside of the reset bar is coated with a protective sleeve made of anti-corrosion elastic material. Preferably, an extrusion groove is formed in the release ring, an extrusion bracket is arranged in the extrusion groove, and a rigid sliding sleeve is connected to the extrusion bracket in a sliding manner. Preferably, an elastic sealing sleeve