A pressure relief mechanism for high voltage switch cabinet

Abstract

The utility model discloses a high-voltage switch cabinet pressure relief mechanism, including a switch cabinet; a pressure relief mechanism is installed on the upper end of the switch cabinet, a sealing plate is installed on the bottom end of the pressure relief mechanism at the upper side of the switch cabinet, a tightening mechanism is installed on the upper end of the sealing plate at both sides of the pressure relief mechanism, the tightening mechanism is composed of a plug rod and a mounting tube, the mounting tube is installed at both sides of the pressure relief mechanism, the lower end of the upper end of the plug rod is installed on the upper side of the sealing plate, the upper end of the plug rod is inserted into the mounting tube, a tightening spring is installed at the upper end of the plug rod in the mounting tube, and a buffer bin is installed on the upper end of the switch cabinet at the outer side of the pressure relief mechanism. After the pressure relief of the utility model is completed, the tightening mechanism will drive the sealing plate to reset, and it can be used for multiple pressure relief, which is convenient for automatic reset. When the pressure relief pressure is small, the gas will enter the buffer bin, and the buffer bin will buffer the gas pressure, which can better protect the switch cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinet pressure relief, in particular to a high-voltage switch cabinet pressure relief mechanism. Background Art

[0002] As the name suggests, high and low voltage switchgear is equipment that connects high-voltage or low-voltage cables. Generally, power supply bureaus and substations use high-voltage cabinets, which are then stepped down by transformers to low-voltage cabinets, and then to distribution boxes for various electricity users. The cabinets are nothing more than some protective devices such as switches and circuit breakers assembled into one electrical equipment. The high-voltage switchgear needs to be depressurized through a pressure relief mechanism when in use.

[0003] The Chinese patent number CN202121522025.X discloses a switch cabinet pressure relief protection structure, including a base, a cabinet fixedly connected to the upper end of the base, and a cover plate movably installed on the upper end of the cabinet. The utility model is provided with a heat dissipation component, which includes a heat dissipation hole fixedly arranged on the cover plate, a dust screen fixedly arranged on the upper end of the heat dissipation hole, and four groups of threaded holes fixedly opened on the upper end surface of the cover plate. The internal threads of the threaded holes are connected with threaded rods, the upper end of the threaded rods pass through the dust screen and extend to the upper end of the dust screen, the threaded rods are threadedly connected with the dust screen, and the upper end of the threaded rods is fixedly connected with a rotating block. The prior art has poor sealing during use, and dust and moisture will enter after long-term use, affecting the normal use of the switch cabinet. Utility Model Content

[0004] The utility model aims to provide a high-voltage switch cabinet pressure relief mechanism to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-voltage switch cabinet pressure relief mechanism, including a switch cabinet; a pressure relief mechanism is installed on the upper end of the switch cabinet, and a sealing plate is installed at the bottom end of the pressure relief mechanism located on the upper side of the switch cabinet, and an air outlet is arranged at the lower position of the pressure relief mechanism, and a tightening mechanism is installed on both sides of the upper end of the sealing plate inside the pressure relief mechanism, and the tightening mechanism is composed of an insertion rod and a mounting tube, and the mounting tube is installed on both sides of the pressure relief mechanism, and the lower end of the upper end of the insertion rod is installed on the upper side of the sealing plate, and the upper end of the insertion rod is inserted into the mounting tube, and a tightening spring is installed inside the mounting tube at the upper end of the insertion rod, and a buffer bin is installed at the upper end of the switch cabinet at the outer side of the pressure relief mechanism, and a flap is rotatably installed on the outer side of the buffer bin.

[0006] Preferably, a limit strip is provided at the upper end of the switch cabinet below the sealing plate, and the limit strip is welded at the upper end of the switch cabinet.

[0007] Preferably, a reinforcement strip is provided at the upper end position of the sealing plate, and the reinforcement strip is welded at the upper end position of the sealing plate.

[0008] Preferably, a rubber pad is provided at the bottom end of the sealing plate, and the rubber pad is adhered to the bottom end of the sealing plate by adhesive.

[0009] Preferably, a limit plate is provided at the upper end of the insertion rod in the inner section of the installation tube, and the limit plate is welded to the upper end of the insertion rod.

[0010] Preferably, a damping sleeve is installed at the bottom end of the installation tube, and the damping sleeve is slidably installed on the outside of the insertion rod.

[0011] Preferably, a return spring is installed at the inner side of the flap, and the other end of the return spring is installed inside the buffer bin.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. After the pressure relief is completed, the tightening mechanism will drive the sealing plate to reset. The utility model can be used for multiple pressure relief, which is convenient for automatic reset. When the pressure relief pressure is small, the gas will enter the buffer bin, which will buffer the air pressure and better protect the switch cabinet;

[0014] 2. The limit strip is used to limit the range of movement of the sealing plate to prevent the sealing plate from extending into the interior of the switch cabinet during use;

[0015] 3. The setting of the limit plate is used to limit the range of motion of the plug rod to prevent the plug rod from being separated from the installation tube during use;

[0016] 4. The damping sleeve is used to increase the friction between the installation tube and the insertion rod to avoid the spring-driven shaking of the sealing plate during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the utility model during pressure relief;

[0020] Figure 3 This is a schematic diagram of the structure of the tightening mechanism of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the sealing plate of the utility model.

[0022] In the figure: 1. switch cabinet; 2. pressure relief mechanism; 3. buffer bin; 4. tightening mechanism; 5. air outlet; 6. flap; 7. reset spring; 8. sealing plate; 9. rubber pad; 10. mounting tube; 11. tightening spring; 12. limit plate; 13. damping sleeve; 14. plug rod; 15. limit strip; 16. reinforcement strip. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 In an embodiment of the utility model, a high-voltage switch cabinet pressure relief mechanism comprises a switch cabinet 1; a pressure relief mechanism 2 is installed on the upper end of the switch cabinet 1, a sealing plate 8 is installed on the bottom end of the pressure relief mechanism 2 located on the upper side of the switch cabinet 1, an air outlet 5 is arranged below the pressure relief mechanism 2, a tightening mechanism 4 is installed on both sides of the pressure relief mechanism 2 at the upper end of the sealing plate 8, the tightening mechanism 4 is composed of an insertion rod 14 and a mounting tube 10, the mounting tube 10 is installed on both sides of the pressure relief mechanism 2, the lower end of the upper end of the insertion rod 14 is installed on the upper side of the sealing plate 8, the upper end of the insertion rod 14 is inserted into the mounting tube 10, a tightening spring 11 is installed inside the mounting tube 10 at the upper end of the insertion rod 14, a buffer bin 3 is installed on the upper end of the switch cabinet 1 at the outer side of the pressure relief mechanism 2, and a flap 6 is rotatably installed on the outer side of the buffer bin 3.

[0025] A limit strip 15 is provided at the upper end of the switch cabinet 1 below the sealing plate 8. The limit strip 15 is welded at the upper end of the switch cabinet 1. The limit strip 15 is provided to limit the range of movement of the sealing plate 8 to prevent the sealing plate 8 from extending into the interior of the switch cabinet 1 during use; a reinforcement strip 16 is provided at the upper end of the sealing plate 8 to prevent the sealing plate 8 from being deformed due to a large force during use; a rubber pad 9 is provided at the bottom end of the sealing plate 8 to prevent the sealing plate 8 from being deformed due to a large force during use. The rubber pad 9 is adhered to the bottom end of the sealing plate 8 by adhesive. The rubber pad 9 is relatively soft and can fill the gap between the sealing plate 8 and the limit strip 15, so that the sealing plate 8 can be installed more tightly.

[0026] A limit plate 12 is provided at the upper end of the inner section of the insertion rod 14, and the limit plate 12 is welded to the upper end of the insertion rod 14. The setting of the limit plate 12 is used to limit the range of movement of the insertion rod 14 to prevent the insertion rod 14 from detaching from the installation tube 10 during use; a damping sleeve 13 is installed at the bottom end of the installation tube 10, and the damping sleeve 13 is slidably installed on the outside of the insertion rod 14. The setting of the damping sleeve 13 is used to increase the friction between the installation tube 10 and the insertion rod 14 to prevent the spring from driving the sealing plate 8 to shake during use.

[0027] A return spring 7 is installed at the inner side of the flap 6, and the other end of the return spring 7 is installed inside the buffer bin 3. The return spring 7 can drive the flap 6 to reset during use, and ensure that the flap 6 is in a closed state when the air pressure is normal.

[0028] The working principle and use process of the utility model are as follows: when the switch cabinet 1 needs to be depressurized, the pressure inside the switch cabinet 1 increases, and the pressure on the sealing plate 8 will increase. When the thrust on the top plate increases, the tightening spring 11 inside the mounting tube 10 will be compressed and contracted, and the sealing plate 8 will be driven to move upward through the plug rod 14, and the gas will pass through and be discharged through the air outlet 5 to relieve the pressure. After the pressure relief is completed, the tightening mechanism 4 will drive the sealing plate 8 to reset. The utility model can be used for multiple pressure relief, which is convenient for automatic resetting. When the pressure relief pressure is small, the gas will enter the buffer bin 3, and the buffer bin 3 will buffer the air pressure, which can better protect the switch cabinet 1.

[0029] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-voltage switch cabinet pressure relief mechanism, comprising a switch cabinet (1); characterized in that: A pressure relief mechanism (2) is installed at the upper end of the switch cabinet (1); a sealing plate (8) is installed at the lower end of the pressure relief mechanism (2) at an upper position of the switch cabinet (1); an air outlet (5) is provided at a lower position of the pressure relief mechanism (2); a tightening mechanism (4) is installed at the upper end of the sealing plate (8) at both sides of the pressure relief mechanism (2); the tightening mechanism (4) is composed of an insertion rod (14) and a mounting tube (10); the mounting tube (10) is installed at both sides of the pressure relief mechanism (2); the upper and lower ends of the insertion rod (14) are installed on the upper side of the sealing plate (8); the upper end of the insertion rod (14) is inserted into the mounting tube (10); a tightening spring (11) is installed at the upper end of the insertion rod (14) in the mounting tube (10); a buffer bin (3) is installed at the upper end of the switch cabinet (1) at an outer position of the pressure relief mechanism (2); a flap (6) is rotatably installed on the outer side of the buffer bin (3).

2. A high-voltage switch cabinet pressure relief mechanism according to claim 1, characterized in that: A limit strip (15) is provided at the upper end of the switch cabinet (1) below the sealing plate (8), and the limit strip (15) is welded to the upper end of the switch cabinet (1).

3. A high-voltage switch cabinet pressure relief mechanism according to claim 1, characterized in that: A reinforcement strip (16) is provided at the upper end of the sealing plate (8), and the reinforcement strip (16) is welded to the upper end of the sealing plate (8).

4. A high-voltage switch cabinet pressure relief mechanism according to claim 1, characterized in that: A rubber pad (9) is provided at the bottom end of the sealing plate (8), and the rubber pad (9) is adhered to the bottom end of the sealing plate (8) by means of adhesive.

5. A high-voltage switch cabinet pressure relief mechanism according to claim 1, characterized in that: A limit plate (12) is provided at the upper end of the insertion rod (14) located in the inner section of the installation tube (10), and the limit plate (12) is welded to the upper end of the insertion rod (14).

6. A high-voltage switch cabinet pressure relief mechanism according to claim 1, characterized in that: A damping sleeve (13) is installed at the bottom end of the installation tube (10), and the damping sleeve (13) is slidably installed on the outside of the insertion rod (14).

7. A high-voltage switch cabinet pressure relief mechanism according to claim 1, characterized in that: A return spring (7) is installed at the inner side of the flap (6), and the other end of the return spring (7) is installed inside the buffer bin (3).

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