A one-way pressure relief structure of an air inflation cabinet

Abstract

The utility model relates to a kind of one-way pressure relief structure of gas-filled cabinet, including bus chamber, cable chamber and pressure relief chamber, bus chamber and cable chamber are mutually independent sealed chamber, pressure relief chamber is set in the same side of bus chamber and cable chamber, and bus chamber is located above cable chamber, it is characterized by: still including the one-way pressure relief plate and support plate set in pressure relief chamber, support plate is horizontally set and is fixedly sealed with the inner wall of pressure relief chamber around, and support plate divides pressure relief chamber into upper pressure relief chamber and lower pressure relief chamber;Bus chamber is connected with upper pressure relief chamber by explosion-proof valve, and cable chamber is connected with lower pressure relief chamber;Pressure relief hole is opened in support plate, and pressure relief plate is located above pressure relief hole;When pressure relief plate is horizontal state, pressure relief plate completely covers pressure relief hole, and the projection area of pressure relief plate is greater than the projection area of pressure relief hole;When pressure relief plate is upturned state, pressure relief hole is open, and upper pressure relief chamber and lower pressure relief chamber are connected by pressure relief hole. The technical scheme is simple in structure, low in cost and high in reliability.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas-insulated high-voltage switchgear, specifically relating to a one-way pressure relief structure for a gas-insulated switchgear. Background Technology

[0002] Currently, the safety factor of the pressure relief channel of gas-insulated high-voltage switchgear on the market is not high. This is mainly because the pressure relief valve is mostly a two-way valve, and the pressure relief method is pressure relief from both sides, which is not very safe. The pressure relief valve has a complex structure, high cost, and is not sensitive enough to open in time when a problem occurs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to make up for the shortcomings of the existing technology and provide a one-way pressure relief structure for an inflatable cabinet.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A one-way pressure relief structure for a gas-insulated switchgear includes a busbar compartment, a cable compartment, and a pressure relief chamber. The busbar compartment and the cable compartment are independent sealed chambers. The pressure relief chamber is located on the same side of the busbar compartment and the cable compartment, with the busbar compartment above the cable compartment. The structure is characterized by: a one-way pressure relief plate and a support plate disposed within the pressure relief chamber. The support plate is horizontally positioned and fixedly sealed to the inner wall of the pressure relief chamber on all four sides, dividing the pressure relief chamber into an upper pressure relief chamber and a lower pressure relief chamber. The busbar compartment is connected to the upper pressure relief chamber via an explosion-proof valve, and the cable compartment is connected to the lower pressure relief chamber. A pressure relief hole is provided on the support plate, with the pressure relief plate positioned above the pressure relief hole. When the pressure relief plate is horizontal, it completely covers the pressure relief hole, and the projected area of ​​the pressure relief plate is larger than the projected area of ​​the pressure relief hole. When the pressure relief plate is flipped upwards, the pressure relief hole is open, and the upper and lower pressure relief chambers are connected through the pressure relief hole.

[0006] Furthermore, the pressure relief plate includes plate I and plate II, which are hinged or fixedly connected by several micro-connecting strips. Plate I is fixedly connected to the support plate. When plate II is in a horizontal state, plate II completely covers the pressure relief hole, and the projected area of ​​plate II is larger than the projected area of ​​the pressure relief hole. When plate II is in an upward-tilted state, the pressure relief hole is open, and the upper pressure relief chamber and the lower pressure relief chamber are connected through the pressure relief hole.

[0007] Furthermore, the plate I is provided with several fixing holes, and the plate I is fixedly connected to the support plate through the fixing holes and metal screws.

[0008] Furthermore, the plate II is fixedly connected to the support plate by nylon screws.

[0009] The beneficial effects of this invention are: simple structure, low cost, high reliability, and convenient installation and maintenance. When an arcing fault occurs in the cable compartment, the arcing rushes into the lower pressure relief chamber. The air pressure in the lower pressure relief chamber is greater than that in the upper pressure relief chamber. Under the action of high pressure, plate II is lifted into an upward-flipped state, the pressure relief hole is opened, and the lower and upper pressure relief chambers are connected through the pressure relief hole for pressure relief. Due to the presence of the explosion-proof valve, the arcing in the lower pressure relief chamber does not affect the busbar compartment. Attached Figure Description

[0010] Figure 1 This is a perspective view of the gas-filled cabinet in an embodiment of this utility model.

[0011] Figure 2 This is a front view of the gas-filled cabinet in an embodiment of this utility model.

[0012] Figure 3 This is a right view of the gas-filled cabinet in an embodiment of this utility model.

[0013] Figure 4 yes Figure 2 AA sectional view.

[0014] Figure 5 yes Figure 2 BB cross-sectional view.

[0015] Figure 6 yes Figure 3 CC section view.

[0016] Figure 7 yes Figure 4 A magnified view of section G in the middle.

[0017] Figure 8 yes Figure 6 Enlarged view of section E in the middle.

[0018] Figure 9 yes Figure 6 Enlarged view of section F in the middle.

[0019] Figure 10 yes Figure 2 DD sectional view.

[0020] Figure 11 This is a perspective view of the pressure relief chamber in an embodiment of this utility model.

[0021] Figure 12 This is a front view of the one-way pressure relief plate in an embodiment of this utility model.

[0022] Figure 13 yes Figure 12 Enlarged view of section H in the middle.

[0023] In the diagram: 1-Busbar compartment, 2-Pressure relief compartment, 201-Upper pressure relief compartment, 202-Lower pressure relief compartment, 3-Cable compartment, 4-One-way pressure relief plate, 401-Plate I, 402-Micro connecting strip, 403-Plate II, 404-Fixing hole, 5-Support plate, 501-Pressure relief hole, 6-Metal screw, 7-Nylon screw, 8-Explosion-proof valve. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] A one-way pressure relief structure for a gas-insulated switchgear, such as Figure 1 and Figure 6 As shown, the system includes a busbar compartment 1, a cable compartment 3, and a pressure relief chamber 2. The busbar compartment 1 and cable compartment 3 are independent, sealed chambers. The pressure relief chamber 2 is located on the same side as the busbar compartment 1 and cable compartment 3, with the busbar compartment 1 positioned above the cable compartment 3. It also includes a one-way pressure relief plate 4 and a support plate 5 disposed within the pressure relief chamber 2. The support plate 5 is horizontally positioned and fixedly sealed to the inner wall of the pressure relief chamber 2 on all sides. The support plate 5 divides the pressure relief chamber 2 into an upper pressure relief chamber 201 and a lower pressure relief chamber 202. The busbar compartment 1 is connected to the upper pressure relief chamber 201 via an explosion-proof valve 8 (e.g., ...). Figure 10 As shown), the cable chamber 3 is connected to the lower pressure relief chamber 202. A pressure relief hole 501 is provided on the support plate 5 (as shown). Figure 11 As shown), the pressure relief plate 4 is located above the pressure relief hole 501 (as shown). Figures 4-9 (As shown).

[0026] The pressure relief plate 4 includes plate I 401 and plate II 403. Plate I 401 and plate II 403 are fixedly connected by several micro connecting strips 402. The projected area of ​​plate II 403 is larger than the projected area of ​​the pressure relief hole 501. Plate I 401 is fixedly connected to the support plate 5 by fixing holes 404 and metal screws 6. Plate II 403 is fixedly connected to the support plate 5 by nylon screws 7.

[0027] When an arcing fault occurs in busbar chamber 1, the arcing is depressurized into the upper pressure relief chamber 201 through the explosion-proof valve 8. At this time, the air pressure in the upper pressure relief chamber 201 is greater than the air pressure in the lower pressure relief chamber 202. Due to the support of the support plate 5, plate II 403 is in a horizontal state and completely covers the pressure relief hole 501. The upper pressure relief chamber 201 and the lower pressure relief chamber 202 are not connected, and the arcing in the upper pressure relief chamber 201 cannot affect the lower pressure relief chamber 202.

[0028] When an arcing fault occurs in cable compartment 3, the arcing rushes into the lower pressure relief chamber 202. At this time, the air pressure in the lower pressure relief chamber 202 is greater than the air pressure in the upper pressure relief chamber 201. Under the action of high temperature, the clamping plate II 403 is melted by the nylon screw 7. Under the action of high pressure, the connection of the micro-connecting strip 402 is very weak, and the plate II 403 is lifted into an upward flipped state, the pressure relief hole 501 is open, and the lower pressure relief chamber 202 and the upper pressure relief chamber 201 are connected through the pressure relief hole 501 to relieve pressure. Due to the presence of the explosion-proof valve 8, the arcing in the lower pressure relief chamber 202 does not affect the busbar compartment 1.

[0029] Alternatively, the connection between plate I 401 and plate II 403 can also be achieved by hinge, as long as the plate II 403 can be lifted up to an upward-folding state when the pressure in the pressure relief chamber 2 is high.

Claims

1. A unidirectional pressure relief structure for a gas-insulated switchgear, comprising a busbar compartment (1), a cable compartment (3), and a pressure relief chamber (2), wherein the busbar compartment (1) and the cable compartment (3) are independent sealed chambers, the pressure relief chamber (2) is located on the same side of the busbar compartment (1) and the cable compartment (3), and the busbar compartment (1) is located above the cable compartment (3), characterized in that: It also includes a one-way pressure relief plate (4) and a support plate (5) installed in the pressure relief chamber (2). The support plate (5) is horizontally arranged and fixedly sealed to the inner wall of the pressure relief chamber (2) on all sides. The support plate (5) divides the pressure relief chamber (2) into an upper pressure relief chamber (201) and a lower pressure relief chamber (202). The busbar chamber (1) is connected to the upper pressure relief chamber (201) through an explosion-proof valve (8), and the cable chamber (3) is connected to the lower pressure relief chamber (202). The support plate (5) is located on the upper wall of the pressure relief chamber (202). A pressure relief hole (501) is provided, and a pressure relief plate (4) is located above the pressure relief hole (501). When the pressure relief plate (4) is in a horizontal state, the pressure relief plate (4) completely covers the pressure relief hole (501), and the projected area of ​​the pressure relief plate (4) is larger than the projected area of ​​the pressure relief hole (501). When the pressure relief plate (4) is in an upward-turned state, the pressure relief hole (501) is open, and the upper pressure relief chamber (201) and the lower pressure relief chamber (202) are connected through the pressure relief hole (501).

2. The gas-insulated switchgear unidirectional pressure relief structure according to claim 1, characterized in that: The pressure relief plate (4) includes plate I (401) and plate II (403). Plate I (401) and plate II (403) are hinged or fixedly connected by several micro-connecting strips (402). Plate I (401) is fixedly connected to the support plate (5). When plate II (403) is in a horizontal state, plate II (403) completely covers the pressure relief hole (501), and the projected area of ​​plate II (403) is larger than the projected area of ​​the pressure relief hole (501). When plate II (403) is in an upward state, the pressure relief hole (501) is open, and the upper pressure relief chamber (201) and the lower pressure relief chamber (202) are connected through the pressure relief hole (501).

3. The one-way pressure relief structure of the gas-insulated switchgear according to claim 2, characterized in that: The plate I (401) is provided with several fixing holes (404), and the plate I (401) is fixedly connected to the support plate (5) through the fixing holes (404) and metal screws (6).

4. The one-way pressure relief structure of the gas-insulated switchgear according to claim 2, characterized in that: The plate II (403) is fixedly connected to the support plate (5) by nylon screws (7).

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