Arc extinguish chamber and circuit breaker

Abstract

The utility model discloses an arc extinguish chamber and a circuit breaker, comprising a first side plate, a second side plate and a plurality of arc extinguishing grid sheets, the plurality of arc extinguishing grid sheets are arranged between the first side plate and the second side plate; the arc extinguishing device further comprises a first fixing piece and a second fixing piece, the first fixing piece and the second fixing piece are each provided with a plurality of installation grooves, and the installation grooves are used for installing arc extinguishing grid pieces. Compared with the prior art, the arc extinguish chamber has the advantages that the grid sheets are fixed through the first fixing piece and the second fixing piece, so that the grid sheets are more convenient to mount, the first side plate and the second side plate are fixed on the first fixing piece and the second fixing piece in a bonding manner, the traditional side wall carving and grid sheet riveting processes are omitted, the cost is reduced, and the production efficiency is improved. Cost can be reduced, and research and development speed can be accelerated. Meanwhile, the size, the shape and the replacement of any arc extinguish chamber in the arc extinguish chambers can be adjusted at any time according to test conditions, thereby being very convenient and flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an arc extinguishing chamber. Background Art

[0002] Arc extinguishing circuit breakers for low voltage circuit breakers usually adopt the "metal grid arc extinguishing method", the basic principle of which is to use the induced magnetic field generated by the metal grid to form electromagnetic power (magnetic arc blowing force), suck the arc into the arc extinguishing chamber, and then divide it into several small segments, and then cool and extinguish it. According to the "cathode effect" of the arc, when the arc discharges, a large number of positive ions are attracted and accumulated at the cathode end. When the alternating current passes through zero and reverses, the cathode becomes the anode, and the positive ion area can form a reverse electric field of about 150V-250V. This electric field can offset the external electric field of the arc, thereby blocking the arc current and extinguishing the arc.

[0003] However, the current development of new energy products involves a very high arc voltage, which the existing arc extinguishing chamber solution cannot meet and requires a new design. So there are two problems involved: Problem 1: The new design needs to be proofed and broken before it can be issued for mold opening. The process involves the need to quickly process the arc extinguishing chamber. It usually takes 15 days to process the arc extinguishing chamber, because the most difficult part of the process is that the side panels of the arc extinguishing chamber need to be carved and the grids need to be riveted, which greatly extends the development cycle. Problem 2: In order to increase the arc voltage, some arc extinguishing chambers reduce the width of the arc path in the arc extinguishing chamber. However, after the arc path width is reduced, due to the limitation of the arc extinguishing chamber cavity, the gas-generating parts in the arc extinguishing chamber cannot be installed normally, and the solution cannot be processed, so it needs to be solved.

[0004] Therefore, the utility model needs to provide an arc extinguishing chamber with simple structure and convenient assembly. Utility Model Content

[0005] The purpose of the utility model is to provide an arc extinguishing chamber, so as to solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] An arc extinguishing chamber comprises: a first side plate, a second side plate and a plurality of arc extinguishing grids, wherein the plurality of arc extinguishing grids are located between the first side plate and the second side plate;

[0008] It also includes a first fixing member and a second fixing member, the first fixing member and the second fixing member are arranged opposite to each other and a distance is provided between the first fixing member and the second fixing member, the first fixing member and the second fixing member are located between the first side plate and the second side plate, and the first fixing member and the second fixing member are both provided with a plurality of mounting grooves, and the mounting grooves are used to install arc extinguishing grids.

[0009] Furthermore, the depth of the mounting groove is greater than or equal to the length of two side legs of the arc-extinguishing grid.

[0010] Furthermore, the mounting grooves are arranged in sequence from bottom to top along the height of the first fixing member and the second fixing member.

[0011] Furthermore, a gap is provided between the mounting grooves, and the gap distance is: 0.3-0.8mm.

[0012] Furthermore, the mounting groove is arranged to be inclined, and the inclination angle of the mounting groove is 1-3°.

[0013] Furthermore, the number of the mounting grooves is equal to the number of the arc-extinguishing grids.

[0014] Furthermore, the first side panel and the second side panel are equal in size and have the same shape.

[0015] Furthermore, the first fixing member and the second fixing member are equal in size and shape.

[0016] Furthermore, the first side panel and the second side panel are respectively fixed on the outer surfaces of the first fixing member and the second fixing member by bonding.

[0017] Furthermore, a limiting plate is provided on each of the first fixing member and the second fixing member, and the limiting plate is used to limit the first side panel and the second side panel; the limiting plate is arranged on the remaining edges of the first fixing member and the second fixing member except the open end of the installation groove, and the angle formed by the limiting plate and the installation surface of the first fixing member and the second fixing member is a right angle.

[0018] The utility model also relates to a circuit breaker, comprising the arc extinguishing chamber mentioned above.

[0019] The beneficial effects of the utility model are:

[0020] The utility model is provided with a first fixing part and a second fixing part, and the grid is fixed by the first fixing part and the second fixing part, so that the grid installation is more convenient. In addition, the first side plate and the second side plate are fixed to the first fixing part and the second fixing part by bonding. The utility model removes the traditional side wall carving and grid riveting process, which can reduce costs and speed up the research and development speed. At the same time, the size, shape and replacement of any arc extinguishing chamber in the arc extinguishing chamber can be adjusted at any time according to the test situation, which is very convenient and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the arc extinguishing chamber of the utility model;

[0022] Figure 2 It is a rear view of the arc extinguishing chamber of the utility model;

[0023] Figure 3 It is a side view of the arc extinguishing chamber of the utility model;

[0024] Figure 4 It is a three-dimensional diagram of the arc extinguishing chamber of the utility model;

[0025] Figure 5 This is the front view of the arc extinguishing chamber of the utility model;

[0026] Figure 6 The utility model is a structural schematic diagram of an arc extinguishing chamber installed on a circuit breaker.

[0027] Reference numerals:

[0028] A first side plate 1 , a second side plate 2 , a plurality of arc-extinguishing grids 3 , a first fixing member 4 , a second fixing member 5 , a mounting groove 6 , and a limiting plate 7 . DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0030] Among them, it needs to 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 utility model 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 utility model.

[0031] 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 utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] 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.

[0033] 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.

[0034] like Figures 1 to 6 As shown, an arc extinguishing chamber comprises: a first side plate 1, a second side plate 2 and a plurality of arc extinguishing grids 3, wherein the plurality of arc extinguishing grids 3 are located between the first side plate 1 and the second side plate 2. In this embodiment, the first side plate 1 and the second side plate 2 have the same shape and size.

[0035] The circuit breaker further comprises a first fixing member 4 and a second fixing member 5. The first fixing member 4 and the second fixing member 5 are of equal size and shape. The first fixing member 4 and the second fixing member 5 are installed in the circuit breaker to be fixed up and down, left and right, front and back. The first fixing member 4 and the second fixing member 5 are arranged opposite to each other and a spacing A is provided between the first fixing member 4 and the second fixing member 5. The first fixing member 4 and the second fixing member 5 are located between the first side plate 1 and the second side plate 3. The first fixing member 4 and the second fixing member 5 are also provided with a plurality of mounting grooves 6. During assembly, the arc-extinguishing grids 3 are inserted into the mounting grooves 6 one by one for fixing. In addition, the mounting grooves 6 separate each arc-extinguishing grid 3 to prevent the two side feet of the arc-extinguishing grid 3 from being punctured, causing the arc-extinguishing grid 3 to short-circuit.

[0036] It can be seen from the above method that the arc extinguishing grid 3 is fixed by the first fixing member 4 and the second fixing member 5, making the installation of the arc extinguishing grid 3 more convenient. In addition, the first side 1 and the second side plate 2 are fixed to the first fixing member 3 and the second fixing member 4 by bonding. The utility model removes the traditional side wall carving and arc extinguishing grid 3 riveting process, which can reduce costs and speed up research and development. At the same time, the size, shape and replacement of any arc extinguishing chamber in the arc extinguishing chamber can be adjusted at any time according to the test situation, which is very convenient and flexible.

[0037] In addition, it should be noted that the depth of the mounting groove 6 is greater than or equal to the length of the two side legs of the arc-extinguishing grid 3. During assembly, the two side legs of the arc-extinguishing grid 3 can be covered by the mounting groove 6, thereby preventing the two side legs of the arc-extinguishing grid 3 from being punctured and avoiding a short circuit of the arc-extinguishing grid 3.

[0038] In this embodiment, the mounting grooves 6 are sequentially arranged from bottom to top along the height of the first fixing member 4 and the second fixing member 5. It should be noted that the depths of the mounting grooves 6 between adjacent mounting grooves 6 are not straight when they are arranged, so that the arc extinguishing grid 3 is distributed in length at the end away from the mounting groove 6, which is beneficial for introducing the arc into the arc extinguishing chamber according to the movement direction of the moving contact. In addition, the design of the arc extinguishing grid 3 can be arbitrary, and the arrangement can be cross, fan-shaped, each piece is at an angle, vertical, and vertical.

[0039] In addition, it should be noted that there is a gap between the mounting grooves 6, and the gap distance is: 0.3-0.8mm. In this embodiment, the spacing distance is 0.4mm. The mounting grooves 6 are tilted, and the tilt angle of the mounting grooves 6 is 1-3°. The tilted arrangement forms an arc-extinguishing grid arranged in a fan-shaped structure, which is more conducive to cutting the arc and can quickly extinguish the arc. The shape of the arc-extinguishing grid 3 is set to a U-shaped arc-extinguishing grid. The arc-extinguishing grid structure effectively increases the arc voltage, improves the utilization rate of the arc-extinguishing grid, and staggers and lengthens the cutting arc, so that the arc is quickly extinguished. In order to cooperate with the installation of the arc-extinguishing grid 3, the number of the mounting grooves 6 is equal to the number of the arc-extinguishing grids 3, and in actual applications, the shape of the arc-extinguishing grid 3 can also be other shapes, which are not specifically limited.

[0040] In addition, it should be noted that in order to improve assembly efficiency and save time costs, the first side panel 1 and the second side panel 2 are respectively fixed to the outer surfaces of the first fixing member 4 and the second fixing member 5 by bonding, so that the original 15-day processing cycle is shortened to 3 days. In the actual production process, the first side panel 1 and the second side panel 2 can also be connected by riveting, screws or snaps.

[0041] In order to firmly install the first side panel 1 and the second side panel 2 on the first fixing member 4 and the second fixing member 5, a limiting plate 7 is provided on the first fixing member 4 and the second fixing member 5. The limiting plate 7 can effectively prevent the first side panel 1 and the second side panel 2 from falling off the first fixing member 4 and the second fixing member 5. The limiting plate 7 is provided on the remaining edges of the first fixing member 4 and the second fixing member 5 except the open end of the mounting groove 6, and the angle formed by the limiting plate 7 and the mounting surfaces of the first fixing member 4 and the second fixing member 5 is a right angle.

[0042] The utility model also relates to a circuit breaker, comprising the arc extinguishing chamber described above, and the circuit breaker also has the technical effect achieved by the arc extinguishing device described above.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An arc extinguishing chamber, characterized in that: include: A first side plate, a second side plate and a plurality of arc-extinguishing grids, wherein the plurality of arc-extinguishing grids are located between the first side plate and the second side plate; It also includes a first fixing member and a second fixing member, the first fixing member and the second fixing member are arranged opposite to each other and a distance is provided between the first fixing member and the second fixing member, the first fixing member and the second fixing member are located between the first side plate and the second side plate, and the first fixing member and the second fixing member are both provided with a plurality of mounting grooves, and the mounting grooves are used to install arc extinguishing grids.

2. The arc extinguishing chamber according to claim 1, characterized in that: The depth of the mounting groove is greater than or equal to the length of two side legs of the arc-extinguishing grid.

3. The arc extinguishing chamber according to claim 2, characterized in that: The mounting grooves are arranged in sequence from bottom to top along the height of the first fixing member and the second fixing member.

4. The arc extinguishing chamber according to claim 3, characterized in that: There is a gap between the installation grooves, and the gap distance is 0.3-0.8mm.

5. The arc extinguishing chamber according to claim 4, characterized in that: The mounting groove is arranged obliquely, and the inclination angle of the mounting groove is 1-3°.

6. The arc extinguishing chamber according to claim 1, characterized in that: The number of the mounting grooves is equal to the number of the arc-extinguishing grids.

7. The arc extinguishing chamber according to claim 1, characterized in that: The first side plate and the second side plate are equal in size and have the same shape.

8. The arc extinguishing chamber according to claim 1, characterized in that: The first side plate and the second side plate are respectively fixed on the outer surfaces of the first fixing member and the second fixing member by bonding.

9. The arc extinguishing chamber according to claim 8, characterized in that: A limiting plate is provided on each of the first fixing member and the second fixing member, and the limiting plate is used to limit the first side panel and the second side panel; the limiting plate is arranged on the remaining edges of the first fixing member and the second fixing member except the open end of the installation groove, and the angle formed by the limiting plate and the installation surface of the first fixing member and the second fixing member is a right angle.

10. A circuit breaker, characterized in that: The arc extinguishing chamber comprises any one of claims 1 to 9.

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