Zero-flashover terminal cover structure and circuit breaker

Abstract

The zero-flashover terminal cover structure comprises a terminal cover body, an air inlet of the terminal cover body is connected with an arc spraying opening of the circuit breaker, the terminal cover body is fixed to the circuit breaker through screws, and a plurality of first mounting holes are further formed in the side, close to the circuit breaker, of the upper portion of the terminal cover body; the middle part of the upper end of the terminal cover body is also provided with a plurality of second installation holes. Compared with the prior art, the zero-flashover cover is simple in structure, the structure of the flashover cover can be greatly enhanced, higher electric arc energy can be resisted, and the flashover cover cannot be exploded.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a zero-flashover terminal cover structure and a circuit breaker. Background Art

[0002] Existing zero arcing cover solution: The existing zero arcing cover is fixed with screws, and only the front end of the arcing cover is screwed to the middle cover, and the rear end of the arcing cover is not fixed with the base by screws. After the arc enters the arcing cover, the arc is blocked by the arc isolation plate, and the arc is trapped in the arcing cover. The internal pressure of the arcing cover is very high, and the arcing cover is easy to explode.

[0003] Therefore, the present invention needs to provide a zero-arcing terminal cover structure, which has a simple structure and can be greatly enhanced to withstand higher arc energy without being exploded. Summary of the invention

[0004] The object of the present invention is to provide a zero-flashover terminal cover structure, thereby solving the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A zero arcing terminal cover structure comprises: a terminal cover body, an air inlet of the terminal cover body is connected to an arc spraying port of a circuit breaker, and the terminal cover body is fixed to the circuit breaker by screws; The terminal cover body is provided with three accommodating cavities, each of which is provided with a plurality of arc isolation plates, which are sequentially arranged in the accommodating cavity, with a spacing between adjacent arc isolation plates, and each of which is provided with a plurality of air holes; A plurality of first mounting holes are also provided on one side of the upper part of the terminal cover body close to the circuit breaker, and a plurality of second mounting holes are also provided in the middle part of the upper end of the terminal cover body.

[0006] Further, the terminal cover body comprises an upper plate, a rear plate, a first side plate, a second side plate, a front plate and a partition plate, wherein the front plate, the first side plate, the second side plate and the rear plate are sequentially connected end to end to form a frame having a receiving cavity, the upper plate is fixedly mounted on the upper part of the frame, and the partition plate is mounted on the lower end of the frame; The area of ​​the front plate is smaller than that of the rear plate.

[0007] Furthermore, the upper plate and the rear plate are both provided with a plurality of exhaust holes.

[0008] Furthermore, a plurality of mounting grooves are provided on the surfaces of the upper plate and the partition plate that are close to each other, and the mounting grooves are used to mount the arc isolation plates.

[0009] Further, the plurality of groups of arc isolation plates are composed of a first group of arc isolation plates and a second group of arc isolation plates, the number of the first group of arc isolation plates is 6, and the number of the second group of arc isolation plates is 1.

[0010] Furthermore, the first group of arc isolation plates are equal in size and have the same structure; the area of ​​the second group of isolation plates is smaller than the area of ​​the second group of arc isolation plates.

[0011] Furthermore, the front plate, the upper plate and the rear plate are connected and fixed by integral molding.

[0012] Furthermore, an air inlet is provided between the lower end of the front plate and the partition.

[0013] Furthermore, the air inlet and the arc spray port are tightly fitted together.

[0014] The present invention also includes a circuit breaker, wherein the circuit breaker includes the above-mentioned zero arcing terminal cover structure.

[0015] The beneficial effects of the present invention are: Since a plurality of first mounting holes are provided on the upper side of the terminal cover body close to the circuit breaker, a plurality of second mounting holes are provided in the middle portion of the upper end of the terminal cover body. During assembly, the terminal cover body is fixed to the base of the circuit breaker by passing fixing screws through the first mounting holes and the second mounting holes. Since the terminal cover body is fixed to the shell by the front and rear screws, the structure of the terminal cover body is greatly enhanced, and it can withstand higher arc energy and will not be exploded. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an installation diagram of the terminal cover and the circuit breaker of the present invention; Figure 2 is a structural diagram of the terminal cover of the present invention; Figure 3 is a structural diagram of the terminal cover of the present invention; Figure 4 It is an installation diagram of the terminal cover and the circuit breaker of the present invention; Figure 5 is a structural diagram of the terminal cover of the present invention; Figure 6 It is a structural diagram of the terminal cover of the present invention.

[0017] Reference numerals: Terminal cover body 1, air inlet 2, arc spray port 3, arc isolation plate 4, air vent 5, first mounting hole 6, second mounting hole 7, exhaust hole 8, mounting groove 9; It includes an upper plate 101 , a rear plate 102 , a first side plate 103 , a second side plate 104 , a front plate 105 , and a partition plate 106 . DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0022] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0023] like Figures 1 to 6 As shown, a zero arcing terminal cover structure comprises: a terminal cover body 1, an air inlet 2 of the terminal cover body 1 is connected to an arc spraying port 3 of a circuit breaker, and the terminal cover body 1 is fixed to the circuit breaker by screws; The terminal cover body 1 is provided with three accommodating cavities, which are arranged in parallel in sequence, and each of the accommodating cavities is provided with multiple groups of arc isolation plates, which are arranged in sequence in the accommodating cavities, and there is a spacing between adjacent arc isolation plates 4, and each of the arc isolation plates 4 is provided with multiple air holes 5, through which the gas in the terminal cover can be discharged to prevent the terminal from bursting. In this embodiment, the arc isolation plate 4 is made of metal material; A plurality of first mounting holes 6 are also provided on one side of the upper portion of the terminal cover body 1 close to the circuit breaker, and a plurality of second mounting holes 7 are also provided in the middle portion of the upper end of the terminal cover body 1 .

[0024] It can be known from the above method that since a plurality of first mounting holes 6 are provided on the upper side of the terminal cover body 1 close to the circuit breaker, a plurality of second mounting holes 7 are provided in the middle of the upper end of the terminal cover body 1. During assembly, the terminal cover body 1 is fixed to the base of the circuit breaker by passing the fixing screws through the first mounting holes 6 and the second mounting holes 7. Since the terminal cover body 1 is fixed to the circuit breaker housing by the front and rear screws, the structure of the terminal cover body 1 is greatly enhanced, and it can withstand higher arc energy and will not be exploded.

[0025] In addition, it is worth noting that the terminal cover body 1 includes an upper plate 101, a rear plate 102, a first side plate 103, a second side plate 104, a front plate 105 and a partition plate 106. The front plate 105, the first side plate 103, the rear plate 102 and the second side plate 104 are sequentially connected end to end to form a frame having a accommodating cavity. The upper plate 101 is fixedly mounted on the upper part of the frame, and the partition plate 106 is mounted on the lower end of the frame. The area of ​​the front plate is smaller than that of the rear plate. The front plate 105, the upper plate 101 and the rear plate 102 are connected and fixed by an integral molding method. Since it is made in an integrated manner, the strength of the terminal cover body 1 is increased, and it can withstand higher arc energy without being exploded. In this embodiment, the first side plate and the second side plate are equal in size and structure, and the first side plate 103 and the second side plate 104 are located on both sides along the length direction of the upper plate 101; An air inlet 2 is also provided between the lower end of the front plate 105 and the partition plate 106 , and the air inlet 2 is closely fitted with the arc spraying port 3 , so that an arc generated inside the circuit breaker enters the air inlet 2 along the arc spraying port 3 , and then enters from the air inlet 2 .

[0026] In addition, in order to exhaust the gas in the terminal cover and prevent the terminal cover from exploding, a plurality of exhaust holes 8 are provided on the upper plate 101 and the rear plate 102. In the present embodiment, the exhaust holes 8 are long strips, and in the actual production process, the shape of the exhaust holes 8 can also be other shapes, which are not limited to specific shapes.

[0027] In order to install the arc isolation plate 4, the upper plate 101 and the partition plate 106 are provided with a plurality of mounting grooves 9 on their surfaces close to each other. The mounting grooves 9 of the upper plate correspond one to one with the mounting grooves of the partition plate. The mounting grooves are used to install the arc isolation plates. During assembly, the arc isolation plates are inserted into the mounting grooves in sequence, and then the arc isolation plates are installed in the accommodating cavity. The assembly is very simple.

[0028] In addition, it is worth noting that the multiple groups of arc isolation plates are composed of a first group of arc isolation plates and a second group of arc isolation plates, the number of the first group of arc isolation plates is 6, the number of the second group of arc isolation plates is 1, and the first group of arc isolation plates are equal in size and have the same structure; because the terminal cover is connected to the base of the circuit breaker, the partition is stepped near one end of the circuit breaker, so that the area of ​​the second group of arc isolation plates is smaller than that of the second group of arc isolation plates.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A zero arcing terminal cover structure, characterized in that: include: A terminal cover body, wherein the air inlet of the terminal cover body is connected to the arc spray port of the circuit breaker, and the terminal cover body is fixed to the circuit breaker by screws; The terminal cover body is provided with three accommodating cavities, each of which is provided with a plurality of arc isolation plates, which are sequentially arranged in the accommodating cavity, with a spacing between adjacent arc isolation plates, and each of which is provided with a plurality of air holes; A plurality of first mounting holes are also provided on one side of the upper part of the terminal cover body close to the circuit breaker, and a plurality of second mounting holes are also provided in the middle part of the upper end of the terminal cover body.

2. The zero arcing terminal cover structure according to claim 1, characterized in that: The terminal cover body comprises an upper plate, a rear plate, a first side plate, a second side plate, a front plate and a partition plate, wherein the front plate, the first side plate, the second side plate and the rear plate are sequentially connected end to end to form a frame body having a receiving cavity, the upper plate is fixedly mounted on the upper part of the frame body, and the partition plate is mounted on the lower end of the frame body; The area of ​​the front plate is smaller than that of the rear plate.

3. The zero arcing terminal cover structure according to claim 2, characterized in that: The upper plate and the rear plate are both provided with a plurality of exhaust holes.

4. The zero arcing terminal cover structure according to claim 3, characterized in that: The surfaces of the upper plate and the partition plate close to each other are also provided with a plurality of mounting grooves, and the mounting grooves are used for mounting the arc isolation plates.

5. The zero arcing terminal cover structure according to claim 1, characterized in that: The plurality of groups of arc isolation plates consist of a first group of arc isolation plates and a second group of arc isolation plates. The number of the first group of arc isolation plates is 6, and the number of the second group of arc isolation plates is 1.

6. The zero arcing terminal cover structure according to claim 5, characterized in that: The first group of arc isolation plates are equal in size and have the same structure; the area of ​​the second group of arc isolation plates is smaller than that of the second group of arc isolation plates.

7. The zero arcing terminal cover structure according to claim 2, characterized in that: The front plate, the upper plate and the rear plate are connected and fixed by integral molding.

8. The zero arcing terminal cover structure according to claim 2, characterized in that: An air inlet is also provided between the lower end of the front plate and the partition plate.

9. The zero arcing terminal cover structure according to claim 8, characterized in that: The air inlet and the arc spray port are tightly fitted together.

10. A circuit breaker, comprising a zero arcing terminal cover structure, characterized in that: The arcing terminal cover structure is the same as the arcing terminal cover structure described in any one of claims 1 to 9.

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