A quick breaking mechanism of an arc-proof power distribution switch cabinet

Abstract

The utility model discloses a kind of quick breaking mechanism of arc-proof power distribution switchgear, it is related to electric power equipment technical field, including the outer surface fixed connection by heat dissipation mechanism of shell, and heat dissipation mechanism includes the heat dissipation fin fixedly connected in the position of shell outer surface, the inside of the shell is opened by heat dissipation air duct, and the inside of heat dissipation fin is provided with flow guide plate, the joint of shell is fixedly connected with sealing rubber strip, shell is made of high-strength insulating material, and is provided with insulating shield, reduce electric field concentration, improve insulating property, heat dissipation fin increases the heat dissipation area, heat dissipation air duct is in the mode of natural convection or forced air cooling, heat generated in breaking process is promptly dissipated. The quick breaking mechanism of arc-proof power distribution switchgear, compared with the existing ordinary quick breaking mechanism, realizes quick, reliable circuit breaking, enhances arc extinguishing capacity, improves protection performance, reduces maintenance cost, and improves operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a quick disconnection mechanism for an arc-proof power distribution switchgear. Background Technology

[0002] Power equipment mainly includes two categories: power generation equipment and power supply equipment. Power generation equipment mainly includes power plant boilers, steam turbines, gas turbines, water turbines, generators, transformers, etc. Power supply equipment mainly includes transmission lines of various voltage levels, instrument transformers, contactors, etc. In the power system, arc-proof distribution switchgear plays a key role in ensuring the stability and safety of power distribution. When the system experiences faults such as short circuits or overloads, quickly disconnecting the circuit is an important measure to protect the safety of equipment and personnel. Existing mechanisms have certain deficiencies and are difficult to meet the ever-increasing power demand and safety standards.

[0003] A quick-disconnecting structure for a miniature circuit breaker, as described in application number CN201821709726.2, includes a trip latch, a contact bracket, a moving contact, a stationary contact, and a locking plate. The trip latch is connected to the contact bracket by a first rivet, the contact bracket is connected to the moving contact by a second rivet, and the contact bracket and locking plate are connected by a third rivet. The moving contact has an oblong hole and a corresponding arc surface. The third rivet passes through the oblong hole and has a fixed shaft inside. The locking plate has a boss, the position of which corresponds to the position of the arc surface. The position of the stationary contact corresponds to the position of the moving contact. This utility model has a simple manufacturing process, achieves a quick tripping effect, improves the circuit breaker's disconnecting speed, and enhances the circuit breaker's arc-extinguishing capability. However, the rapid disconnection mechanism has problems such as insufficient disconnection speed, poor arc extinguishing effect, and inadequate protection performance, which can easily lead to continuous arc burning, causing serious consequences such as equipment damage, fire, and even personal injury. In addition, it is difficult to adapt to complex environments and has poor operation convenience.

[0004] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings, and proposed a fast disconnection mechanism for arc-proof power distribution switchgear. Utility Model Content

[0005] The purpose of this utility model is to provide a quick disconnection mechanism for an arc-proof power distribution switchgear to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quick disconnection mechanism for an arc-proof power distribution switchgear, comprising a housing and a heat dissipation mechanism, characterized in that the outer surface of the housing is fixedly connected to the heat dissipation mechanism, and the heat dissipation mechanism includes heat dissipation fins fixedly connected to the outer surface of the housing, the interior of the housing is provided with a heat dissipation air duct, and the interior of the heat dissipation fins is provided with a guide plate, and the seams of the housing are fixedly connected with a sealing strip.

[0007] Preferably, a battery shielding mesh is fixedly connected to one side of the outer casing, and a gas storage tank is provided on the inner wall of the outer casing.

[0008] Preferably, a control valve is provided on one side of the gas storage tank, and a nozzle is fixedly connected to one end of the gas storage tank.

[0009] Preferably, a stationary contact is fixedly connected to the inner wall of the housing, and a moving contact is provided at the bottom of the stationary contact.

[0010] Preferably, a buffer and shock absorption mechanism is fixedly connected to one side of the moving contact, and the buffer and shock absorption mechanism includes an elastic column fixedly connected to one side of the moving contact, a rubber buffer pad is fixedly connected to one end of the elastic column, and a composite material layer is fixedly connected to one side of the rubber buffer pad.

[0011] Preferably, an insulating connecting rod is fixedly connected to one side of the composite material layer, and an energy storage spring is fixedly connected to the bottom of the insulating connecting rod.

[0012] Preferably, a support column is provided on one side of the energy storage spring, and a base is provided at the bottom of the support column, and an arc-extinguishing grid is provided on one side of the moving contact.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model dissipates the heat generated during the breaking process in a timely manner through the setting of the heat dissipation mechanism, improves the heat conduction efficiency, and ensures that the breaking mechanism can operate stably in high-temperature environments. A layer of thermochromic material is coated on the surface of the heat dissipation fins. The color of the thermochromic material changes with temperature. When the temperature of the breaking mechanism rises, the color of the thermochromic material changes, causing the thermal radiation characteristics of the heat dissipation fins to change, thereby improving its heat dissipation efficiency and achieving adaptive heat dissipation under different ambient temperatures and load conditions.

[0015] 2. This utility model, through the setting of a buffer and shock absorption mechanism, can effectively absorb impact force, reduce mechanical wear, reduce noise, extend the service life of the breaking mechanism, improve operational stability, enhance the overall strength of the insulating connecting rod, enable the rapid action operating mechanism to work more stably, and work in conjunction with the rapid action operating mechanism to improve the reliability and service life of the breaking mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the outer shell 1 of this utility model;

[0018] Figure 3This is a schematic diagram of the heat dissipation mechanism 2 of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the buffer and shock absorption mechanism 10 of this utility model.

[0020] In the diagram: 1. Outer shell; 2. Heat dissipation mechanism; 201. Heat dissipation fins; 202. Heat dissipation duct; 203. Guide plate; 3. Sealing strip; 4. Battery shielding mesh; 5. Gas tank; 6. Control valve; 7. Nozzle; 8. Stationary contact; 9. Moving contact; 10. Buffer and shock absorption mechanism; 1001. Elastic column; 1002. Rubber buffer pad; 1003. Composite material layer; 11. Insulating connecting rod; 12. Energy storage spring; 13. Support column; 14. Base; 15. Arc extinguishing grid. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-3 As shown, a quick disconnection mechanism for an arc-resistant power distribution switchgear includes a housing 1 and a heat dissipation mechanism 2. The heat dissipation mechanism 2 is fixedly connected to the outer surface of the housing 1, and the heat dissipation mechanism 2 includes heat dissipation fins 201 fixedly connected to the outer surface of the housing 1. A heat dissipation duct 202 is formed inside the housing 1, and a guide plate 203 is provided inside the heat dissipation fins 201. A sealing strip 3 is fixedly connected to the seams of the housing 1. The housing 1 is made of high-strength insulating material and is equipped with an insulating shield to reduce electric field concentration and improve insulation performance. The heat dissipation fins 201 increase the heat dissipation area. The heat dissipation duct 202 dissipates the heat generated during the disconnection process in a timely manner through natural convection or forced air cooling. The guide plate 203 increases the airflow within the heat dissipation duct 202, improving heat conduction efficiency and ensuring stable operation of the disconnection mechanism even in high-temperature environments.

[0023] like Figure 1 As shown, a battery shielding mesh 4 is fixedly connected to one side of the outer casing 1, and a gas storage tank 5 is provided on the inner wall of the outer casing 1. A control valve 6 is provided on one side of the gas storage tank 5, and a nozzle 7 is fixedly connected to one end of the gas storage tank 5. The battery shielding mesh 4 is made of a metal material with high magnetic permeability, which can effectively shield the electromagnetic interference generated during the disconnection process and prevent it from affecting the surrounding electronic equipment. When disconnecting, the control valve 6 is opened, and the high-pressure gas in the gas storage tank 5 is ejected through the nozzle 7 to quickly disperse the electric arc.

[0024] Furthermore, a stationary contact 8 is fixedly connected to the inner wall of the outer casing 1, and a moving contact 9 is provided at the bottom of the stationary contact 8. A buffer and shock absorption mechanism 10 is fixedly connected to one side of the moving contact 9, and the buffer and shock absorption mechanism 10 includes an elastic column 1001 fixedly connected to one side of the moving contact 9. A rubber buffer pad 1002 is fixedly connected to one end of the elastic column 1001, and a composite material layer 1003 is fixedly connected to one side of the rubber buffer pad 1002. Both the stationary contact 8 and the moving contact 9 are made of high-purity copper alloy material with silver plating to reduce contact resistance and the possibility of arc generation. At the moment of disconnection, the elastic column 1001 and the rubber buffer pad 1002 shock absorption spring can effectively absorb the impact force, reduce mechanical wear, and reduce noise. The composite material layer 1003 is composed of high-strength fibers and high-performance resin, which can evenly distribute mechanical stress, avoid stress concentration leading to damage to the insulating connecting rod 11, extend the service life of the disconnection mechanism, and improve the stability of operation.

[0025] Furthermore, an insulating connecting rod 11 is fixedly connected to one side of the composite material layer 1003, and an energy storage spring 12 is fixedly connected to the bottom of the insulating connecting rod 11. A support column 13 is provided on one side of the energy storage spring 12, and a base 14 is provided at the bottom of the support column 13. An arc-extinguishing grid plate 15 is provided on one side of the moving contact 9. When the circuit breaks, the support column 13 is removed, and the energy storage spring 12 drives the moving contact 9 to break from the stationary contact 8. The arc-extinguishing grid plate 15 is made of a metal material with high temperature resistance and good conductivity. When an electric arc is generated, the high temperature and strong magnetic field of the electric arc will ionize the air around the arc-extinguishing grid plate 15, forming a plasma region.

[0026] Working Principle: When using the quick disconnection mechanism of this arc-proof power distribution switchgear, first ensure the tight installation of the insulating shell 1 and the sealing strip 3. After the power distribution switchgear is put into operation, the operator removes the support column 13 on the top of the base 14. The battery shielding mesh 4 protects the operator. The energy storage spring 12 quickly drives the insulating connecting rod 11, causing the moving contact 9 to separate from the stationary contact 8 and cut off the circuit. Then, the control valve 6 and nozzle 7 of the gas storage tank 5 are opened to quickly extinguish the arc. The heat dissipation fins 201, heat dissipation duct 202, and guide plate 203 of the heat dissipation mechanism 2 dissipate the heat generated during the disconnection process. Finally, during operation, the elastic column 1001, rubber buffer pad 1002, and composite material layer 1003 of the buffer and shock absorption mechanism 10 reduce mechanical wear and noise. The remaining components work together to ensure the stable operation of the disconnection mechanism. This is the working principle of the quick disconnection mechanism of the arc-proof power distribution switchgear.

Claims

1. A quick disconnection mechanism for an arc-resistant power distribution switchgear, comprising a housing (1) and a heat dissipation mechanism (2), characterized in that, The outer surface of the outer shell (1) is fixedly connected to a heat dissipation mechanism (2), and the heat dissipation mechanism (2) includes heat dissipation fins (201) fixedly connected to the outer surface of the outer shell (1). The interior of the outer shell (1) is provided with a heat dissipation air duct (202), and a guide plate (203) is provided inside the heat dissipation fins (201). A sealing strip (3) is fixedly connected to the seam of the outer shell (1).

2. The quick disconnection mechanism of an arc-resistant power distribution switchgear according to claim 1, characterized in that, A battery shielding mesh (4) is fixedly connected to one side of the outer shell (1), and a gas storage tank (5) is provided on the inner wall of the outer shell (1).

3. The quick disconnection mechanism of an arc-resistant power distribution switchgear according to claim 2, characterized in that, A control valve (6) is provided on one side of the gas storage tank (5), and a nozzle (7) is fixedly connected to one end of the gas storage tank (5).

4. The quick disconnection mechanism of an arc-resistant power distribution switchgear according to claim 1, characterized in that, A stationary contact (8) is fixedly connected to the inner wall of the outer casing (1), and a moving contact (9) is provided at the bottom of the stationary contact (8).

5. The quick disconnection mechanism of an arc-resistant power distribution switchgear according to claim 4, characterized in that, A buffer and shock absorption mechanism (10) is fixedly connected to one side of the moving contact (9), and the buffer and shock absorption mechanism (10) includes an elastic column (1001) fixedly connected to one side of the moving contact (9). A rubber buffer pad (1002) is fixedly connected to one end of the elastic column (1001), and a composite material layer (1003) is fixedly connected to one side of the rubber buffer pad (1002).

6. The quick disconnection mechanism of an arc-resistant power distribution switchgear according to claim 5, characterized in that, An insulating connecting rod (11) is fixedly connected to one side of the composite material layer (1003), and an energy storage spring (12) is fixedly connected to the bottom of the insulating connecting rod (11).

7. The quick disconnection mechanism of an arc-resistant power distribution switchgear according to claim 6, characterized in that, A support column (13) is provided on one side of the energy storage spring (12), and a base (14) is provided at the bottom of the support column (13), and an arc-extinguishing grid plate (15) is provided on one side of the moving contact (9).

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