Search

CN-224233206-U - High-pressure environment-friendly gas cabinet with pressure relief knapsack structure

CN224233206UCN 224233206 UCN224233206 UCN 224233206UCN-224233206-U

Abstract

The utility model relates to a high-pressure environment-friendly gas cabinet provided with a pressure relief knapsack structure, which comprises the pressure relief knapsack structure and a gas cabinet, wherein the pressure relief knapsack structure is fixed on the gas cabinet and is far away from an instrument box on the gas cabinet, an upper pile head, a lower pile head, a sensor, a mutual inductor and the like are arranged in the gas cabinet, a partition plate is arranged between the upper pile head and the pressure relief knapsack structure, a diversion buffer area is arranged between a pressure relief opening and the upper pile head, and a pressure relief path is arranged between the pressure relief opening and the lower pile head. The utility model installs the pressure relief knapsack at the back of the cabinet, the back of the upper pile head is separated by the aluminum zinc plate baffle plate, the pressure relief mode directly avoids the upper pile head. And the rear pressure relief design is adopted to separate the upper pile head. And a diversion channel is added between the pressure relief opening and the upper pile head to guide the air to flow to the equipment-free area for release. The bus and the cable terminal on the pressure relief path are additionally provided with the metal protection baffle, and the safety threat to the upper pile head and the peripheral equipment can be reduced while the pressure relief function is met through the targeted design.

Inventors

  • WANG XIAOWEI
  • HAN XUDONG

Assignees

  • 上海纳杰电气成套有限公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (8)

  1. 1. The high-pressure environment-friendly gas cabinet with the pressure relief knapsack structure is characterized by comprising the pressure relief knapsack structure and a gas cabinet, wherein the pressure relief knapsack structure is fixed on the gas cabinet and is far away from an instrument box on the gas cabinet; A partition plate is arranged between the upper pile head and the pressure relief knapsack structure, the partition plate is fixed on the outer surface of the high-pressure environment-friendly gas cabinet, a diversion buffer area is arranged between the pressure relief opening and the upper pile head, and a pressure relief path is arranged between the pressure relief opening and the lower pile head.
  2. 2. The high-pressure environment-friendly gas cabinet with the pressure relief knapsack structure, which is disclosed in claim 1, is characterized in that the pressure relief knapsack structure comprises a pressure relief bag, a pressure relief bag fixing frame and pressure relief side plates, wherein the pressure relief bag, the pressure relief bag fixing frame and the pressure relief side plates are arranged in the pressure relief bag structure, the pressure relief side plates comprise three side plates and an outermost cover plate, the side plates are respectively positioned at two sides of the pressure relief knapsack structure, the pressure relief bag fixing frame is positioned in the two pressure relief side plates, and the pressure relief bag is fixed on the pressure relief bag fixing frame.
  3. 3. The high-pressure environment-friendly gas cabinet provided with the pressure relief backpack structure according to claim 1, wherein the instrument box is fixed on the top of the upper front surface of the gas cabinet.
  4. 4. The high-pressure environment-friendly gas cabinet provided with the pressure relief backpack structure according to claim 1, wherein the pressure relief backpack structure is fixed on the back surface of the gas cabinet.
  5. 5. The high-pressure environment-friendly gas cabinet provided with the pressure relief backpack structure according to claim 4, wherein the pressure relief backpack structure is fixed on a rear upper sealing plate on the back surface of the gas cabinet.
  6. 6. The high-pressure environment-friendly gas cabinet provided with the pressure relief backpack structure according to any one of claims 1 to 5, wherein the partition plate is an aluminum zinc plate.
  7. 7. The high-pressure environment-friendly gas cabinet provided with the pressure relief backpack structure as claimed in claim 6, wherein the thickness of the aluminum-zinc plated plate ranges from 1 mm to 3mm.
  8. 8. The high-pressure environment-friendly gas cabinet with the pressure relief backpack structure according to claim 1, wherein a metal protective baffle is additionally arranged on a bus and a cable terminal on a pressure relief path.

Description

High-pressure environment-friendly gas cabinet with pressure relief knapsack structure Technical Field The utility model relates to a high-pressure environment-friendly gas cabinet, in particular to a high-pressure environment-friendly gas cabinet which is simple in structure, safer in pressure relief and more space-saving, and can protect an upper pile head and peripheral equipment while meeting the pressure relief function. Background The high-voltage cabinet pressure relief technology is a key for ensuring safe operation of power equipment, and particularly when dealing with internal arcing faults, the pressure needs to be quickly released and the fault range is controlled. The prior pressure relief mode is very easy to be associated with the sidecar body after the top is impacted. 1. The key conductive components such as a bus bar, a cable terminal head, a sleeve and the like are concentrated in the region where the primary equipment insulation and the connection of the upper pile head are directly compromised, and high-temperature and high-pressure gas (containing conductive particles decomposed by an electric arc and insulating combustion products) sprayed during pressure relief can directly wash the components, so that the insulation coating of the bus bar is ablated, the sleeve is cracked, insulation breakdown is caused, the cable terminal head is sealed and damaged, joint fracture is caused by moisture invasion or stress concentration, and the contact resistance is increased due to oxidation and loosening of a bolt connection part, so that subsequent heating faults are caused. The risk of arc short circuit is aggravated, if the arc is not completely extinguished during pressure relief, the sprayed ionized gas can bridge the upper pile head bus of the adjacent cabinets, so that interphase or ground short circuit is caused, and especially when a plurality of cabinets are installed in parallel, cascading failure is easy to occur. 2. The compact space results in a concentrated release of energy within the confined space, which is exacerbated by secondary hazards, the top of the upper pile head is typically close to the top plate of the cabinet and may be relatively close to the overhead bus bridge, cable sandwich. During pressure relief, high-pressure gas cannot be fully diffused, and the pressure peak value may be higher, so that structural damage (such as deformation and cracking) is formed to the top plate of the cabinet body and the upper structure. The high-temperature airflow directly toasts control cables or buses in the cable bridge frame above, so that insulation ageing is accelerated, even short-circuit fires occur, and adjacent equipment is chain damaged. If a plurality of high-voltage cabinets are arranged side by side, pressure relief at the top of an upper pile head can possibly cause impact on top equipment (such as a voltage transformer and a lightning arrester) of an adjacent cabinet body, and particularly, regional power failure is easy to cause in a scene of adopting a common box bus. 3. The maintenance and overhaul difficulty is increased and the distance between the upper pile head area and the electrified part is too short, the upper pile head area is a high-voltage electrified part, the pressure relief device (such as a pressure relief valve and a cover plate) is installed at the high-voltage electrified part, the power failure of a bus is required for daily inspection, the power failure range and the operation and maintenance cost are increased, the high-voltage insulating part and the pressure relief device are required to be treated at the same time during overhaul, and the safety protection requirement is higher (such as the requirement of wearing insulating equipment and setting isolation measures). The pressure relief device is influenced by vibration (such as bus electrodynamic force) for a long time, and the bolt loosens to cause the pressure relief function to fail. 4. The compact design trend of the modern cabinet body is not met, the upper space is occupied to influence the layout, the upper pile head area space is narrow, the pressure relief opening is formed in the upper pile head area space to squeeze the bus installation space, the wire inlet scene on a cable is difficult to adapt to, the pressure relief on the top of the upper pile head can directly impact the cable terminal head to the high-voltage cabinet (upper wire inlet cabinet) which is introduced from the top of the cable, and the cable is possibly damaged due to the conflict with the cable bending radius requirement. Disclosure of utility model Aiming at the problems, the main purpose of the utility model is to provide the high-pressure environment-friendly gas cabinet with the pressure relief knapsack structure, which has the advantages of simple structure, safer pressure relief and more space saving, and can protect the upper pile head and peripheral equipment while meeting the pressure relief function.