High-pressure environment-friendly gas cabinet with pressure relief backpack structure

Abstract

The utility model relates to a high-pressure environment-friendly gas cabinet with a pressure relief knapsack structure, which comprises the pressure relief knapsack structure and a gas cabinet, and the pressure relief knapsack structure is fixed on one side of the gas cabinet 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 backpack structure; a flow guide 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. The pressure relief knapsack is additionally arranged at the rear part of the cabinet body, the rear part of the upper pile head is separated by the aluminized zinc plate partition plate, and the pressure relief mode directly avoids the upper pile head. The rear pressure relief design is adopted, and the upper pile head is separated. A flow guide channel is additionally arranged between the pressure relief opening and the upper pile head, and airflow is guided to be released to an equipment-free area. Metal protective baffles are additionally arranged on the bus and the cable terminal on the pressure relief path; through the targeted design, the pressure relief function can be achieved, and meanwhile the safety threat to the upper pile head and peripheral equipment is reduced.

Description

Technical Field

[0001] This utility model relates to a high-pressure environmentally friendly gas cabinet, specifically a high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure that is simple in structure, safer in pressure relief, and more space-saving. It can protect the safety of the upper pile head and surrounding equipment while fulfilling the pressure relief function. Background Technology

[0002] High-voltage switchgear pressure relief technology is crucial for ensuring the safe operation of electrical equipment, especially in dealing with internal arcing faults, where rapid pressure release and control of the fault area are essential. Existing pressure relief methods, once impacted at the top, can easily affect adjacent switchgear.

[0003] I. Direct Threat to Electrical Connection Safety at the Top of the Pile: Damage to the Insulation and Connection of Primary Equipment. The top of the pile area contains key conductive components such as busbars, cable terminals, and bushings. During depressurization, the high-temperature and high-pressure gas (containing conductive particles from arc decomposition and insulation combustion products) will directly erode these components, potentially causing: ablation of the busbar insulation coating and cracking of the bushing, leading to insulation breakdown; damage to the sealing of the cable terminal, allowing moisture intrusion or stress concentration to cause joint breakage; and oxidation and loosening of bolted connections, resulting in increased contact resistance and subsequent overheating failures.

[0004] This exacerbates the risk of arc short circuits. If the arc is not completely extinguished during depressurization, the ejected ionized gas may bridge the upper busbar of adjacent cabinets, causing phase-to-phase or phase-to-ground short circuits. This is especially true when multiple cabinets are installed in parallel, which can easily lead to cascading failures.

[0005] Second, the confined space exacerbates secondary hazards. Energy is concentrated and released within the confined space, and the top of the upper pile head is usually close to the top plate of the cabinet, and may be close to the busbar tray and cable interlayer above. During depressurization: high-pressure gas cannot diffuse fully, and the pressure peak may be even higher, causing structural damage (such as deformation and cracking) to the top plate of the cabinet and the structure above.

[0006] High-temperature airflow directly bakes the control cables or busbars inside the overhead cable tray, accelerating insulation aging and even causing short circuits and fires, leading to cascading damage to adjacent equipment. If multiple high-voltage switchgear are arranged side by side, the pressure relief at the top of the upper terminal may impact the top equipment of adjacent switchgear (such as voltage transformers and surge arresters), especially in scenarios using a shared busbar, which can easily cause regional power outages.

[0007] Third, increased maintenance and repair difficulty: Due to its proximity to live components, the upper pile head area is itself a high-voltage live area. When pressure relief devices (such as pressure relief valves and covers) are installed here: daily inspections require de-energizing the busbar, increasing the outage area and maintenance costs; during maintenance, both high-voltage insulated components and pressure relief devices must be handled simultaneously, requiring higher safety protection standards (such as wearing insulated equipment and setting up isolation measures). The pressure relief device is also subject to long-term vibration (such as busbar electrodynamics), and loose bolts can cause the pressure relief function to fail.

[0008] Fourth, it does not conform to the modern trend of compact cabinet design, occupying upper space and affecting the layout. The space in the upper terminal area is already small, and setting the pressure relief port here will squeeze the busbar installation space. It is difficult to adapt to the scenario of cable entering from the top. For high-voltage cabinets (top-entry cabinets) where cables are introduced from the top, the pressure relief at the top of the upper terminal will directly impact the cable terminal head, which conflicts with the cable bending radius requirements and may cause damage to the cable insulation. Utility Model Content

[0009] To address the aforementioned issues, the main objective of this utility model is to provide a high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure that features a simple structure, safer pressure relief, and greater space saving. This cabinet can provide pressure relief while protecting the upper pile head and surrounding equipment.

[0010] This utility model solves the above-mentioned technical problems through the following solution: a high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure, the high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure includes: a pressure relief backpack structure and a gas cabinet, the pressure relief backpack structure is fixed on the gas cabinet and is located on the side away from the instrument box on the gas cabinet; the gas cabinet is equipped with an upper terminal, a lower terminal, a sensor, and a current transformer.

[0011] A partition is installed between the upper pile head and the pressure relief backpack structure; the partition is fixed to the outer surface of the high-pressure environmental protection gas cabinet; there is a flow guide buffer zone between the pressure relief port and the upper pile head, and a pressure relief path between the pressure relief port and the lower pile head.

[0012] In a specific embodiment of this utility model, the pressure relief backpack structure includes an internally disposed pressure relief bag, a pressure relief bag fixing frame, and pressure relief side plates; the pressure relief side plates include three pieces, namely side plates located on both sides of the pressure relief backpack structure and the outermost cover plate, the pressure relief bag fixing frame is located inside the two pressure relief side plates, and the pressure relief bag is fixed on the pressure relief bag fixing frame.

[0013] In a specific embodiment of this utility model, the instrument box is fixed to the top of the front of the gas cabinet.

[0014] In a specific embodiment of this utility model, the pressure relief backpack structure is fixed to the back of the gas cabinet.

[0015] In a specific embodiment of this utility model, the pressure relief backpack structure is fixed to the rear upper sealing plate on the back of the gas cabinet.

[0016] In a specific embodiment of this utility model, the partition is characterized in that: the partition is an aluminum-zinc coated plate.

[0017] In a specific embodiment of this utility model, the thickness of the aluminum-zinc coated sheet ranges from 1 to 3 mm.

[0018] In a specific embodiment of this utility model, metal protective baffles are installed on the busbars and cable terminals along the pressure relief path.

[0019] The positive and progressive effects of this utility model are as follows: The high-pressure environmentally friendly gas cabinet provided by this utility model is equipped with a pressure relief backpack structure. This utility model adds a pressure relief backpack to the rear of the cabinet and separates the rear of the upper pile head with an aluminum-zinc plate partition, so that the pressure relief method directly avoids the upper pile head.

[0020] The pressure relief path is between the pressure relief port and the lower pile head. Metal protective baffles are installed on the busbars and cable terminals along the pressure relief path.

[0021] This utility model optimizes the pressure relief direction: it adopts a rear pressure relief design, separating it from the upper pile head.

[0022] This invention features a pressure relief buffer zone: a flow channel is added between the pressure relief port and the upper pile head to guide the airflow to be released into the unequipped area.

[0023] This utility model features an enhanced protective structure: metal protective baffles are installed on the busbars and cable terminals along the pressure relief path; through targeted design, the safety threat to the upper pile head and surrounding equipment can be reduced while satisfying the pressure relief function. Attached Figure Description

[0024] Figure 1 This is one of the overall structural schematic diagrams (renderings) of this utility model.

[0025] Figure 2 This is the second schematic diagram of the overall structure of this utility model (rendering).

[0026] Figure 3 This is the third schematic diagram (line drawing) of the overall structure of this utility model.

[0027] The following are the names corresponding to the reference numerals in this utility model:

[0028] Figure 1-3 The structure includes: 1. Pressure relief backpack structure; 2. Gas cabinet; 3. Instrument box; 4. Upper pile head; 5. Lower pile head; 6. Sensor; 7. Current transformer; 8. Partition plate; 9. Pressure relief port; 10. Flow diversion buffer zone; 11. Pressure relief path; 12. Rear upper sealing plate; 101. Pressure relief bag; 102. Pressure relief bag fixing frame; 103. Pressure relief side plate. Detailed Implementation

[0029] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0030] Figure 1 This is one of the overall structural schematic diagrams of this utility model (rendering). Figure 2 This is the second schematic diagram of the overall structure of this utility model (rendering). Figure 3This is the third schematic diagram (line drawing) of the overall structure of this utility model, as shown below. Figure 1-3 As shown: This utility model proposes a high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure includes: a pressure relief backpack structure 1, a gas cabinet 2, and the pressure relief backpack structure 1 is fixed on the gas cabinet 2 and on the side away from the instrument box 3 on the gas cabinet 2; the gas cabinet 2 is provided with an upper terminal 4, a lower terminal 5, a sensor 6, and a current transformer 7; a partition 8 is provided between the upper terminal 4 and the pressure relief backpack structure 1; the partition 8 is fixed on the outer surface of the high-pressure environmentally friendly gas cabinet 2; a flow guiding buffer zone 10 is formed between the pressure relief port 9 and the upper terminal 4, and a pressure relief path 11 is formed between the pressure relief port 9 and the lower terminal 5.

[0031] The pressure relief backpack structure 1 includes an internally disposed pressure relief bag 101, a pressure relief bag fixing frame 102, and pressure relief side plates 103. The pressure relief side plates 103 include three parts, namely side plates located on both sides of the pressure relief backpack structure and an outermost cover plate. The pressure relief bag fixing frame 102 is located inside the two pressure relief side plates, and the pressure relief bag 101 is fixed on the pressure relief bag fixing frame 102.

[0032] In this invention, the instrument box 3 is fixed to the top of the front of the gas cabinet, and the pressure relief backpack structure 1 is fixed to the back of the gas cabinet.

[0033] In the specific implementation process, the pressure relief backpack structure 1 is fixed to the rear upper sealing plate 12 on the back of the gas cabinet.

[0034] In the specific implementation process, the partition can be made of aluminum-zinc coated steel sheet, and the thickness range of the aluminum-zinc coated steel sheet can be 1-3mm.

[0035] In the specific implementation of this utility model, the pressure relief port 9 and the lower pile head 5 form a pressure relief path, and metal protective baffles are installed on the busbars and cable terminals along the pressure relief path.

[0036] This utility model optimizes the pressure relief direction: it adopts a rear pressure relief design, separating it from the upper pile head.

[0037] This invention features a pressure relief buffer zone: a flow channel is added between the pressure relief port and the upper pile head to guide the airflow to be released into the unequipped area.

[0038] This utility model features an enhanced protective structure: metal protective baffles are installed on the busbars and cable terminals along the pressure relief path; through targeted design, the safety threat to the upper pile head and surrounding equipment can be reduced while satisfying the pressure relief function.

[0039] This utility model adds a pressure relief backpack to the rear of the cabinet, and the rear of the upper pile head is separated by an aluminum-zinc coated plate partition, so that the pressure relief method directly avoids the upper pile head.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A high-pressure environmentally friendly gas cabinet equipped with a pressure relief backpack structure, characterized in that: The high-pressure environmentally friendly gas cabinet equipped with a pressure relief backpack structure includes: a pressure relief backpack structure and a gas cabinet. The pressure relief backpack structure is fixed on the gas cabinet and is located away from the instrument box on the gas cabinet. The gas cabinet is equipped with an upper terminal, a lower terminal, a sensor, and a current transformer. A partition is installed between the upper pile head and the pressure relief backpack structure; the partition is fixed to the outer surface of the high-pressure environmental protection gas cabinet; there is a flow guide buffer zone between the pressure relief port and the upper pile head, and a pressure relief path between the pressure relief port and the lower pile head.

2. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to claim 1, characterized in that: The pressure relief backpack structure includes an internal pressure relief pack, a pressure relief pack fixing frame, and pressure relief side panels. The pressure relief side panels consist of three parts: side panels located on both sides of the pressure relief backpack structure and an outermost cover plate. The pressure relief pack fixing frame is located inside the two pressure relief side panels, and the pressure relief pack is fixed on the pressure relief pack fixing frame.

3. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to claim 1, characterized in that: The instrument box is fixed to the top front of the gas cabinet.

4. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to claim 1, characterized in that: The pressure relief backpack structure is fixed to the back of the gas cabinet.

5. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to claim 4, characterized in that: The pressure relief backpack structure is fixed to the rear upper cover plate on the back of the gas cabinet.

6. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to any one of claims 1-5, characterized in that: The partition is made of aluminum-zinc coated steel sheet.

7. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to claim 6, characterized in that: The thickness range of aluminum-zinc coated steel sheets is 1-3mm.

8. The high-pressure environmentally friendly gas cabinet with a pressure relief backpack structure according to claim 1, characterized in that: Metal protective baffles are installed on the busbars and cable terminals along the pressure relief path.

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