Auxiliary arc extinguishing equipment of automobile circuit breaker

Abstract

The utility model relates to an auxiliary arc extinguishing device of an automobile circuit breaker, and aims to solve the problems that heat is generated when an arc of a current automobile circuit breaker is extinguished in an arc extinguishing chamber, subsequent arc extinguishing is affected if the heat cannot be dissipated in time, and the air temperature in the arc extinguishing chamber rises due to the generation of a large amount of heat, so that the arc extinguishing effect is affected. The automobile circuit breaker comprises an automobile circuit breaker body, a heat dissipation assembly is arranged at the top of the automobile circuit breaker body, and an auxiliary structure is arranged behind the heat dissipation assembly. A large amount of heat generated when electric arcs generated by the automobile circuit breaker body are extinguished in an arc extinguish chamber flows into a collection frame, and the heat is affected by instant high temperature; the air pressure intensity in the arc extinguish chamber and the collecting frame is increased, so that the sealing plate is extruded to move upwards, at the moment, a flow channel between the through hole and the transmission pipe is opened, pressure is effectively released, the explosion possibility is reduced, part of heat and electric arcs can be taken away in the pressure releasing process, the electric arcs can be effectively subjected to secondary arc extinguishing through the hollow flash barrier, and the arc extinguishing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive circuit breakers, in particular to an auxiliary arc extinguishing device for an automotive circuit breaker. Background Art

[0002] An automotive circuit breaker is a type of electrical protector that can replace traditional fuses and is used to protect vehicle electrical equipment and circuits. Its main function is to automatically cut off the circuit when a circuit fails or is overloaded, so as to prevent the equipment or circuit from being damaged due to overcurrent, or to cause serious consequences such as vehicle fires.

[0003] In existing automotive circuit breakers, an arc is formed during the separation process between the moving and static contacts due to the voltage between them. The arc enters the arc extinguishing chamber of the arc extinguishing system under the effects of magnetic blowing effect and gas dynamics. The arc entering the arc extinguishing chamber is divided into several series-connected short arcs by arc extinguishing grid plates (also called metal grid plates) arranged at equal distances along the arc direction in the arc extinguishing chamber, so as to quickly cool the arc and rapidly increase the arc voltage drop, achieving the purpose of arc extinguishing.

[0004] However, heat is generated when the arc is extinguished in the arc extinguishing chamber. If this heat cannot be dissipated in time, it will affect subsequent arc extinguishing. At the same time, the generation of a large amount of heat causes the air temperature in the arc extinguishing chamber to rise, making it extremely prone to explosion. In view of this, we propose an auxiliary arc extinguishing device for an automotive circuit breaker. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and meet the actual needs, providing an auxiliary arc extinguishing device for an automotive circuit breaker to solve the technical problems that when the arc of the existing automotive circuit breaker is extinguished in the arc extinguishing chamber, heat is generated. If this heat cannot be dissipated in time, it will affect subsequent arc extinguishing. At the same time, the generation of a large amount of heat causes the air temperature in the arc extinguishing chamber to rise, making it extremely prone to explosion.

[0006] To achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing an auxiliary arc extinguishing device for an automotive circuit breaker, including an automotive circuit breaker body. A heat dissipation component is arranged on the top of the automotive circuit breaker body. An auxiliary structure is arranged behind the heat dissipation component. A collecting frame is arranged at the lower ends of the heat dissipation component and the auxiliary structure. An arc extinguishing chamber is attached to the lower end surface of the collecting frame;

[0007] The auxiliary structure includes a transmission pipe. The transmission pipe is fixedly clamped inside the top of the collecting frame. A cylinder frame is fixedly connected to the top of the transmission pipe. A number of through holes are evenly distributed on the surface of the cylinder frame. A hollow arc separating plate is fixedly arranged inside the transmission pipe. A T-shaped rod is clamped inside the top of the cylinder frame. A sealing plate is fixedly connected to the bottom end of the T-shaped rod. A spring is sleeved outside the T-shaped rod.

[0008] Preferably, the transfer pipe is in communication with the cylinder rack, and the cylinder rack is integrally formed with a plurality of through holes.

[0009] Preferably, the outer wall of the hollow partition arc plate is fitted with the inner wall of the transfer pipe.

[0010] Preferably, the sealing plate and the cylinder rack form an elastic structure through a spring. When the spring is in a normal state, the sealing plate seals the flow channel between the through hole and the transfer pipe.

[0011] Preferably, the heat dissipation component includes a first heat conducting plate, which is fixedly clamped inside the top of the collecting rack. A second heat conducting plate is arranged outside the first heat conducting plate, and the first heat conducting plate and the second heat conducting plate are connected by a plurality of heat dissipation fins.

[0012] Preferably, the heat dissipation fins are bent, and a plurality of heat dissipation fins are distributed between the parts of the first heat conducting plate and the second heat conducting plate that expose the automotive circuit breaker body.

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

[0014] 1. When the arc generated by the automotive circuit breaker body in the present utility model is extinguished in the arc extinguishing chamber, a large amount of heat generated rushes into the inside of the collecting rack. Affected by the instantaneous high temperature, the air pressure in the arc extinguishing chamber and the collecting rack increases, thereby squeezing the sealing plate to move upward. At this time, the flow channel between the through hole and the transfer pipe is opened, effectively relieving pressure and reducing the possibility of explosion. During the pressure relief process, part of the heat and arc can also be taken away. The arc can be effectively extinguished again through the hollow partition arc plate, improving the arc extinguishing efficiency. After the pressure relief ends, affected by the resilience of the spring, the sealing plate returns to its original position, sealing the flow channel between the through hole and the transfer pipe, reducing the possibility of external impurities entering the inside of the automotive circuit breaker body.

[0015] 2. When the arc generated by the automotive circuit breaker body in the present utility model is extinguished in the arc extinguishing chamber, a large amount of heat generated is conducted to the surfaces of the first heat conducting plate and the second heat conducting plate. The first heat conducting plate and the second heat conducting plate are made of heat conducting ceramic sheets, and the first heat conducting plate and the second heat conducting plate effectively conduct the heat, reducing the accumulation of heat. The heat conducted through the first heat conducting plate and the second heat conducting plate finally reaches the surface of the heat dissipation fins, and the bent heat dissipation fins effectively disperse the heat, improving the heat dissipation efficiency. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the internal structure of the automotive circuit breaker body of the present utility model;

[0018] Figure 3 is a schematic diagram of the partial three-dimensional structure of the present utility model;

[0019] Figure 4 Schematic diagram of the partial cross-sectional structure of the present utility model;

[0020] Figure 5 Of the present utility model Figure 4 Schematic diagram of the partial split structure in the middle;

[0021] In the figure: 1, the body of the automotive circuit breaker; 2, the heat dissipation component; 3, the auxiliary structure; 4, the collecting frame; 5, the arc extinguishing chamber;

[0022] 201, the first heat conduction plate; 202, the second heat conduction plate; 203, the heat dissipation fin;

[0023] 301, the transmission pipe; 302, the cylinder frame; 303, the through hole; 304, the hollow arc separating plate; 305, the T-shaped rod; 306, the sealing plate; 307, the spring. Specific embodiments

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0025] An auxiliary arc extinguishing device for an automotive circuit breaker, see Figures 1 to 5 , including the body 1 of the automotive circuit breaker, a heat dissipation component 2 is provided on the top of the body 1 of the automotive circuit breaker, an auxiliary structure 3 is provided behind the heat dissipation component 2, a collecting frame 4 is provided at the lower ends of the heat dissipation component 2 and the auxiliary structure 3, and an arc extinguishing chamber 5 is attached to the lower end surface of the collecting frame 4;

[0026] The auxiliary structure 3 includes a transfer pipe 301, which is fixedly clamped to the inner side of the top of the collecting frame 4. A cylinder frame 302 is fixedly connected to the top of the transfer pipe 301. A number of through holes 303 are evenly distributed on the surface of the cylinder frame 302. Among them, the transfer pipe 301 is communicated with the cylinder frame 302, and the cylinder frame 302 and the number of through holes 303 are integrally formed. A hollow partition arc plate 304 is fixedly arranged inside the transfer pipe 301. Further, the outer wall of the hollow partition arc plate 304 is matched and fitted with the inner wall of the transfer pipe 301. A T-shaped rod 305 is clamped to the inner side of the top of the cylinder frame 302. A sealing plate 306 is fixedly connected to the bottom end of the T-shaped rod 305. A spring 307 is sleeved outside the T-shaped rod 305. Still further, the sealing plate 306 and the cylinder frame 302 form an elastic structure through the spring 307. When the spring 307 is in a normal state, the sealing plate 306 seals the flow channel between the through hole 303 and the transfer pipe 301. In the present utility model, when a large amount of heat generated when the arc generated by the automotive circuit breaker body 1 is extinguished in the arc extinguishing chamber 5 floods into the inside of the collecting frame 4, affected by the instantaneous high temperature, the air pressure in the arc extinguishing chamber 5 and the collecting frame 4 increases, thereby squeezing the sealing plate 306 to move upward. At this time, the flow channel between the through hole 303 and the transfer pipe 301 is opened, effectively relieving the pressure and reducing the possibility of explosion. During the pressure relief process, part of the heat and arc can also be taken away. The arc can be effectively extinguished for the second time through the hollow partition arc plate 304, improving the arc extinguishing efficiency. After the pressure relief is over, affected by the resilience of the spring 307, the sealing plate 306 returns to its original position, sealing the flow channel between the through hole 303 and the transfer pipe 301, reducing the possibility of external impurities entering the inside of the automotive circuit breaker body 1.

[0027] It should be noted that the heat dissipation assembly 2 includes a first heat conducting plate 201, which is fixedly clamped to the inner side of the top of the collecting frame 4. A second heat conducting plate 202 is arranged outside the first heat conducting plate 201. The first heat conducting plate 201 and the second heat conducting plate 202 are connected by a number of heat dissipation fins 203. Among them, the heat dissipation fins 203 are bent. A number of heat dissipation fins 203 are distributed between the parts of the first heat conducting plate 201 and the second heat conducting plate 202 that expose the automotive circuit breaker body 1. In the present utility model, when a large amount of heat generated when the arc generated by the automotive circuit breaker body 1 is extinguished in the arc extinguishing chamber 5 is conducted to the surfaces of the first heat conducting plate 201 and the second heat conducting plate 202. The first heat conducting plate 201 and the second heat conducting plate 202 are made of heat conducting ceramic sheets. The first heat conducting plate 201 and the second heat conducting plate 202 effectively conduct the heat, reducing the accumulation of heat. The heat conducted through the first heat conducting plate 201 and the second heat conducting plate 202 finally reaches the surface of the heat dissipation fins 203. The bent heat dissipation fins 203 effectively disperse the heat, improving the heat dissipation efficiency.

[0028] Working principle: When the arc generated by the automotive breaker body 1 is extinguished in the arc extinguishing chamber 5, a large amount of heat surges into the inside of the collecting frame 4. Part of the heat is conducted to the surfaces of the first heat conducting plate 201 and the second heat conducting plate 202. The first heat conducting plate 201 and the second heat conducting plate 202 conduct the heat to reduce the accumulation of heat. The heat conducted by the first heat conducting plate 201 and the second heat conducting plate 202 finally reaches the surface of the heat sink 203. The bent heat sink 203 disperses the heat. At the same time, affected by the instantaneous high temperature, the air pressure in the arc extinguishing chamber 5 and the collecting frame 4 increases, thereby squeezing the sealing plate 306 to move upward. At this time, the flow channel between the through hole 303 and the transmission pipe 301 is opened, effectively relieving pressure and reducing the possibility of explosion. During the pressure relief process, part of the heat and arc can also be taken away. The arc can be extinguished twice through the hollow arc separating plate 304 to improve the arc extinguishing efficiency. After the pressure relief ends, affected by the resilience of the spring 307, the sealing plate 306 returns to its original position, sealing the flow channel between the through hole 303 and the transmission pipe 301, reducing the possibility of external impurities entering the inside of the automotive breaker body 1.

[0029] The embodiments disclosed in this utility model are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of this utility model based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of this utility model, they are within the protection scope of this utility model.

Claims

1. An auxiliary arc extinguishing device for an automotive circuit breaker, comprising an automotive circuit breaker body (1), characterized in that, A heat dissipation component (2) is provided at the top of the automotive circuit breaker body (1), an auxiliary structure (3) is provided behind the heat dissipation component (2), a collecting frame (4) is provided at the lower ends of the heat dissipation component (2) and the auxiliary structure (3), and an arc extinguishing chamber (5) is attached to the lower end surface of the collecting frame (4). The auxiliary structure (3) includes a transmission pipe (301), the transmission pipe (301) is fixedly clamped inside the top of the collecting frame (4), a cylinder frame (302) is fixedly connected to the top of the transmission pipe (301), a number of through holes (303) are evenly distributed on the surface of the cylinder frame (302), a hollowed-out arc separating plate (304) is fixedly provided inside the transmission pipe (301), a T-shaped rod (305) is clamped inside the top of the cylinder frame (302), a sealing plate (306) is fixedly connected to the bottom end of the T-shaped rod (305), and a spring (307) is sleeved outside the T-shaped rod (305).

2. The auxiliary arc extinguishing device for an automotive circuit breaker according to claim 1, characterized in that, The transmission pipe (301) is communicated with the cylinder frame (302), and the cylinder frame (302) and the number of through holes (303) are integrally formed.

3. The auxiliary arc extinguishing device for an automotive circuit breaker according to claim 1, characterized in that The outer wall of the hollowed-out arc separating plate (304) is matched and attached to the inner wall of the transmission pipe (301).

4. The auxiliary arc extinguishing device for an automobile disconnector according to claim 1, characterized in that, The sealing plate (306) and the cylinder frame (302) form an elastic structure through the spring (307). When the spring (307) is in a normal state, the sealing plate (306) seals the flow channel between the through holes (303) and the transmission pipe (301).

5. The auxiliary arc extinguishing device of an automotive cut-off relay according to claim 1, wherein, The heat dissipation component (2) includes a first heat conducting plate (201), the first heat conducting plate (201) is fixedly clamped inside the top of the collecting frame (4), a second heat conducting plate (202) is provided outside the first heat conducting plate (201), and the first heat conducting plate (201) and the second heat conducting plate (202) are connected by a number of heat dissipation fins (203).

6. The auxiliary arc extinguishing device for an automotive circuit breaker according to claim 5, characterized in that, The heat dissipation fins (203) are bent, and a number of heat dissipation fins (203) are distributed between the parts of the first heat conducting plate (201) and the second heat conducting plate (202) that are exposed from the automotive circuit breaker body (1).

Images