Switch cabinet automatic arc extinguishing device

Abstract

The utility model discloses an automatic arc extinguishing device for a switch cabinet, which comprises a left arc extinguishing shield plate and a right arc extinguishing shield plate, and a first arc extinguishing partition plate and a second arc extinguishing partition plate are fixedly connected to the upper side position between the left arc extinguishing shield plate and the right arc extinguishing shield plate. The inner walls of the left arc extinguishing shield plate and the right arc extinguishing shield plate located on the lower side of the second arc extinguishing partition plate are fixedly connected with mounting seats, and arc extinguishing grid pieces are fixedly connected into the mounting seats on the two sides. Through the structure, under the action of the arc extinguishing partition plate holes in the first arc extinguishing partition plate 3 and the second arc extinguishing partition plate 4, the divided short arc can be continuously divided, so that the arc extinguishing speed is accelerated, the arc extinguishing is not influenced by the number of the arc extinguishing grid plates, and the arc striking and extinguishing effects can be better achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing devices, in particular to an automatic arc extinguishing device for a switch cabinet. Background Art

[0002] The arc extinguishing device is one of the most important components in the automatic transfer switch. The existing arc extinguishing device is usually composed of an arc-isolating plate and an arc-extinguishing grid. The arc-isolating plate is designed with a simple opening, and the arc-extinguishing grid is simply installed in the arc-shaped slot at the corresponding position of the arc-isolating plate. The arc-isolating plate and the arc-extinguishing grid are combined together through the slot. The automatic transfer switch will generate an arc during the conversion process, and then the arc will be introduced into the air through the arc-extinguishing grid for arc extinguishing.

[0003] However, the above arc extinguishing device has the following problems: the design concept of the existing automatic transfer switch electrical appliances has been used for many years. When an arc is generated, an arc extinguishing grid is installed in the arc isolation plate. When an arc is generated, the arc current generates magnetic flux around it, magnetizing the arc extinguishing grid, and the magnetic flux path changes. The arc extinguishing grid generates a suction force that pulls the arc into the arc extinguishing chamber. After the arc enters the arc extinguishing grid, it is divided into many short arcs in series. After encountering the cold arc extinguishing grid, the arc resistance increases and the arc voltage rises. When the arc voltage is greater than the power frequency recovery voltage, the arc is extinguished. The existing arc extinguishing device directly guides the arc generated by the automatic transfer switch during the conversion process into the air through the arc extinguishing grid. If the automatic transfer switch switches too quickly, it may not be able to extinguish the arc in time. Moreover, as the requirements for breaking performance become higher and higher, the number of arc extinguishing grids will increase, and the distance between the plates will become smaller and smaller.

[0004] At present, the following two methods are usually used to solve the problem: 1. Increasing the volume of the arc-isolating plate, but this will increase the volume of the automatic transfer switch accordingly, and also increase the cost of the product. 2. Reducing the thickness of the arc-extinguishing grid to increase the distance between the arc-extinguishing grid pieces, but reducing the thickness also reduces the effective area of ​​the arc-extinguishing grid to cool the arc, which actually reduces the arc-extinguishing performance of the arc-extinguishing device; therefore, improvement is needed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an automatic arc extinguishing device for a switch cabinet, which solves the problem that the volume of the arc isolation plate is increased, which causes the volume of the automatic transfer switch to increase accordingly, while also increasing the cost of the product and reducing the thickness of the arc extinguishing grid to increase the distance between the arc extinguishing grid pieces, thereby reducing the arc extinguishing performance of the arc extinguishing device.

[0006] The utility model also provides an automatic arc extinguishing device for a switch cabinet as described above, comprising a left arc extinguishing cover plate and a right arc extinguishing cover plate, wherein a first arc extinguishing baffle and a second arc extinguishing baffle are fixedly connected at the upper position between the left arc extinguishing cover plate and the right arc extinguishing cover plate, and mounting seats are fixedly connected to the inner walls of the left arc extinguishing cover plate and the right arc extinguishing cover plate located at the lower side of the second arc extinguishing baffle, and arc extinguishing grids are fixedly connected in the mounting seats on both sides.

[0007] According to the automatic arc extinguishing device for a switch cabinet, arc extinguishing chute holes are provided on both the first arc extinguishing chute and the second arc extinguishing chute.

[0008] According to the automatic arc extinguishing device for a switch cabinet, the outer sides of the left arc extinguishing cover plate and the right arc extinguishing cover plate are fixedly connected with a fixed mounting plate.

[0009] According to the automatic arc extinguishing device for a switch cabinet, a connecting hole is provided on the fixed mounting plate.

[0010] According to the automatic arc extinguishing device for a switch cabinet, the arc extinguishing grid is U-shaped.

[0011] According to the automatic arc extinguishing device for a switch cabinet, the arc extinguishing chute holes on the first arc extinguishing chute and the second arc extinguishing chute are arranged alternately.

[0012] According to the automatic arc extinguishing device for a switch cabinet, the left arc extinguishing cover plate and the right arc extinguishing cover plate are symmetrically arranged.

[0013] According to the automatic arc extinguishing device for a switch cabinet, a movable groove is provided in the middle of the arc extinguishing grid.

[0014] The utility model has the following beneficial effects:

[0015] In the utility model, arc extinguishing cleft plates are provided with arc extinguishing cleft plates on the first arc extinguishing cleft plates and the second arc extinguishing cleft plates, and the arc extinguishing cleft plates on the first arc extinguishing cleft plates 3 and the second arc extinguishing cleft plates 4 are staggered. It can further split the short arc that has been split, thereby accelerating the arc extinguishing speed, and making it unaffected by the number of arc extinguishing grids, so as to better play the role of arc initiation and arc extinguishing.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 This is a structural diagram of an automatic arc extinguishing device for a switch cabinet according to the utility model;

[0019] Figure 2This is an internal structure diagram of an automatic arc extinguishing device for a switch cabinet according to the utility model;

[0020] Figure 3 This is a structural diagram of an arc extinguishing grid of an automatic arc extinguishing device for a switch cabinet according to the utility model;

[0021] Figure 4 The utility model is a structural diagram of an arc extinguishing partition of an automatic arc extinguishing device for a switch cabinet.

[0022] Legend:

[0023] 1. Left arc-extinguishing cover plate; 2. Right arc-extinguishing cover plate; 3. First arc-extinguishing baffle plate; 4. Second arc-extinguishing baffle plate; 5. Mounting seat; 6. Arc-extinguishing grid; 7. Movable groove; 8. Fixed mounting plate; 9. Connecting hole. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0025] Reference Figure 1-4 The utility model embodiment provides an automatic arc extinguishing device for a switch cabinet, which includes a left arc extinguishing cover plate 1 and a right arc extinguishing cover plate 2. The outer sides of the left arc extinguishing cover plate 1 and the right arc extinguishing cover plate 2 are fixedly connected with a fixed mounting plate 8. The fixed mounting plate 8 is provided with a connecting hole 9. The automatic arc extinguishing device is stably fixed in the high-voltage switch cabinet through the connecting hole 9. The left arc extinguishing cover plate 1 and the right arc extinguishing cover plate 2 are symmetrically arranged. The upper side position between the left arc extinguishing cover plate 1 and the right arc extinguishing cover plate 2 is fixedly connected with a first arc extinguishing chute 3 and a second arc extinguishing chute 4. The first arc extinguishing chute 3 and the second arc extinguishing chute 4 are provided with arc extinguishing chute holes. The first arc extinguishing chute The arc extinguishing baffle holes on the plate 3 and the second arc extinguishing baffle 4 are arranged in an alternating manner, which will continue to divide the short arc that has been divided, thereby accelerating the arc extinguishing speed and making it unaffected by the number of arc extinguishing grids, so as to better play the role of arc initiation and arc extinguishing. The inner walls of the left arc extinguishing cover plate 1 and the right arc extinguishing cover plate 2 located on the lower side of the second arc extinguishing baffle 4 are fixedly connected with a mounting seat 5, and arc extinguishing grids 6 are fixedly connected to the mounting seats 5 on both sides. The arc extinguishing grids 6 are U-shaped and have a movable groove 7 in the middle. When an arc is generated by the power switch of the high-voltage switch cabinet, the arc is pulled into the arc extinguishing chamber under the action of the arc extinguishing grids 6.

[0026] Working principle: When in use, first, the automatic arc extinguishing device is stably fixed in the high-voltage switch cabinet by using the fixed mounting plate 8 and the switch equipment in the high-voltage switch cabinet is connected to the movable slot 7. When the high-voltage switch cabinet generates an arc by performing an electric switch, the arc is pulled into the arc extinguishing chamber under the action of the arc extinguishing grid 6, and then the arc is divided into many series short arcs. Under the action of the arc extinguishing baffle holes opened on the first arc extinguishing baffle 3 and the second arc extinguishing baffle 4, since the arc extinguishing baffle holes on the first arc extinguishing baffle 3 and the second arc extinguishing baffle 4 are staggered, it will continue to divide the already divided short arc, thereby accelerating the arc extinguishing speed, and making it unaffected by the number of arc extinguishing grids 6, which can better play the role of arc initiation and arc extinguishing.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An automatic arc extinguishing device for a switch cabinet, characterized in that: include: A left arc extinguishing cover plate (1) and a right arc extinguishing cover plate (2), wherein a first arc extinguishing chute (3) and a second arc extinguishing chute (4) are fixedly connected at the upper position between the left arc extinguishing cover plate (1) and the right arc extinguishing cover plate (2), a mounting seat (5) is fixedly connected to the inner wall of the left arc extinguishing cover plate (1) and the right arc extinguishing cover plate (2) located at the lower side of the second arc extinguishing chute (4), and arc extinguishing grids (6) are fixedly connected inside the mounting seats (5) on both sides.

2. The automatic arc extinguishing device for a switch cabinet according to claim 1, characterized in that: Arc extinguishing chute holes are provided on both the first arc extinguishing chute (3) and the second arc extinguishing chute (4).

3. The automatic arc extinguishing device for switch cabinet according to claim 1, characterized in that: The outer sides of the left arc extinguishing cover plate (1) and the right arc extinguishing cover plate (2) are both fixedly connected with a fixed mounting plate (8).

4. The automatic arc extinguishing device for switch cabinet according to claim 3, characterized in that: The fixed installation plate (8) is provided with a connection hole (9).

5. The automatic arc extinguishing device for switch cabinet according to claim 4, characterized in that: The arc extinguishing grid (6) is U-shaped.

6. The automatic arc extinguishing device for switch cabinet according to claim 5, characterized in that: The arc-extinguishing chute holes on the first arc-extinguishing chute (3) and the second arc-extinguishing chute (4) are arranged alternately.

7. The automatic arc extinguishing device for switch cabinet according to claim 6, characterized in that: The left arc extinguishing cover plate (1) and the right arc extinguishing cover plate (2) are symmetrically arranged.

8. The automatic arc extinguishing device for a switch cabinet according to claim 7, characterized in that: A movable groove (7) is provided in the middle of the arc extinguishing grid (6).

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