Static contact structure

Abstract

The utility model discloses a static contact structure, comprising a contact assembly, the contact assembly comprises a bus block and a main silver point, and the main silver point is located at the upper end of the bus block; the contact assembly further comprises an arc silver point, and the arc silver point is fixedly arranged on the connecting block. The arc extinguish chamber further comprises an arc striking assembly, the arc striking assembly is located on one end side close to the connecting block, the arc striking assembly is connected with the bus block, and the arc striking assembly is used for introducing an arc into the arc extinguish chamber. Compared with the prior art, the static contact is simple in structure, firm in fixation, good in arc striking effect, good in burning resistance and capable of bearing high-voltage and high-energy electric arcs.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a static contact structure. Background Art

[0002] The frame circuit breaker is a switch device that can carry and break the current under normal circuit conditions, and can also carry and break the current under abnormal circuit conditions within a specified time. With the development of new energy technologies, such as photovoltaics, wind power, and energy storage, the AC system voltage has reached AC1500V, and the DC system voltage has reached DC2000V. As the system voltage continues to increase, the rated working voltage of the supporting components also needs to meet the system voltage requirements. However, with the increase in working voltage, higher requirements are placed on the reliable breaking performance of the circuit breaker.

[0003] In order to improve the breaking performance of the circuit breaker, in the existing structure, a moving contact assembly, a static contact assembly and an arc extinguishing cover are usually used to cooperate with each other to extinguish the arc. The existing static contact structure is generally divided into two types: one is that the arc contact is closer to the main contact, the arc contact opening distance is not significantly improved, and the breaking performance is improved less; the other is that the arc contact is far away from the main contact, the opening distance is significantly improved, and the breaking performance is greatly improved, but this static contact structure is generally an integrated structure, which is larger in size and higher in cost.

[0004] Therefore, the utility model needs to provide a static contact structure which has a simple structure, is firmly fixed, has a good arc-starting effect, is good in burning resistance, and can withstand high voltage and high energy arcs. Utility Model Content

[0005] The purpose of the utility model is to provide a static contact structure, 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] A static contact structure, comprising: a contact assembly, the contact assembly comprising a busbar block and a main silver point, the main silver point being located at the upper end of the busbar block;

[0008] The contact assembly further comprises an arc silver point, and the arc silver point is fixedly arranged on the connection block;

[0009] It also includes an arc-striking assembly, which is located near one end of the connecting block, is connected to the busbar block, and is used to introduce an arc into an arc-extinguishing chamber.

[0010] Furthermore, the arc striking assembly includes an arc striking piece, the arc striking piece is connected to an extension portion, and the extension portion is provided with an arc striking block

[0011] Furthermore, the lower portion of the arc striking block is fixed to the upper surface of the extending portion by welding.

[0012] Furthermore, an arc striking groove is provided on the arc striking block.

[0013] Furthermore, the arc striking block is made of a triangular solid iron block.

[0014] Furthermore, the arc-striking groove is located on the upper surface of the arc-striking block, and the arc-striking groove is concave toward the center of the arc-striking block.

[0015] Furthermore, it also includes an angle plate, which is located on the contact on the side away from the connecting block, and the angle plate is fixed to the busbar block through a fixing piece.

[0016] Furthermore, one end of the connection block is connected to the busbar block by welding.

[0017] Furthermore, a fixing hole is provided on one side of the busbar block close to the connecting block, and the shape of the fixing hole corresponds to the shape of the connecting block.

[0018] Furthermore, the angle plate, the busbar block and the arc-starting plate are fixedly connected by fixing bolts.

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

[0020] The utility model is provided with an arc striking assembly, through which the arc can be introduced into the arc extinguishing chamber. In addition, an arc striking groove is also provided on the arc striking block, which can play a guiding role, so that the arc is transferred to the arc extinguishing chamber along the arc striking groove. The arc striking block has strong burning resistance when transferring the arc and can withstand high-voltage and high-energy arcs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the static contact structure of the utility model;

[0022] Figure 2 It is a structural diagram of the arc striking assembly of the utility model;

[0023] Figure 3 It is an exploded view of the contact assembly of the utility model;

[0024] Figure 4 It is a structural diagram of the contact assembly of the utility model.

[0025] Reference numerals:

[0026] Contact assembly 1, busbar block 11, fixing hole 111, main silver point 12, arc silver point 13, connecting block 14, protruding block 15;

[0027] Arc striking assembly 2, arc striking sheet 21, extension portion 22, arc striking block 23, arc striking groove 231;

[0028] A first portion 211, a second portion 212, a third portion 213, and a gap 214;

[0029] Corner plate 3. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] like Figures 1 to 4As shown, a static contact structure comprises: a contact assembly 1, wherein the contact assembly 1 comprises a busbar block 11 and a main silver point 12. In this embodiment, the main silver point 12 is in the shape of a long strip, and the main silver point 12 is located at the upper end of the busbar block 11. The area of ​​the main silver point 12 occupies half of the area of ​​the upper end of the busbar block 11. The main silver point 12 is fixed to the upper end of the busbar block 11 by welding, thereby ensuring that the main silver point 12 can be firmly fixed to the upper end of the busbar block 11;

[0036] The contact assembly further includes an arc silver point 13, which is fixedly arranged on a connecting block 14. The arc silver point 13 is fixed to one end of the connecting block 14 away from the busbar block by welding. In order to make the height of the arc silver point 13 and the height of the main silver point 13 on the same plane, a protruding block 15 is further provided at one end of the connecting block 14 away from the busbar. The protruding block 15 is connected to the connecting block 14 by an integral molding method. In this embodiment, the arc silver point 13 is welded to the upper surface of the protruding block 15.

[0037] It also includes an arc-striking assembly 2, which is located at one end side close to the connecting block 14, and is connected to the busbar block 11. The arc-striking assembly 2 is used to introduce an arc into the arc extinguishing chamber.

[0038] It can be known from the above method that since the arc striking component 2 is provided, the arc can be introduced into the arc extinguishing chamber through the provided arc striking component 2. In addition, an arc striking groove is also provided on the arc striking block. The provided arc striking groove can play a guiding role, so that the arc is transferred to the arc extinguishing chamber along the arc striking groove. The arc striking block has strong burning resistance when transferring the arc and can withstand high voltage and high energy arcs.

[0039] Specifically, in the present embodiment, the arc-striking assembly 2 includes an arc-striking plate 21, to which an extension portion 22 is connected, and an arc-striking block 23 is provided on the extension portion 22. The arc-striking plate 21 includes a first part 211, a second part 212 and a third part 213, wherein the second part 212 and the third part 213 are L-shaped second parts 212 and third parts 213, and the second part 212 and the third part 213 are connected and fixed to the first part on one side close to the first part, and a gap 214 is provided between the second part 212 and the third part 213, and the gap 214 is used to place the connecting block 14, and mounting holes and rivet holes are provided on the second part 212 and the third part 214, and the three are first riveted in place with rivets through the provided mounting holes and rivet holes and the mounting holes and rivet holes corresponding to the busbar block and the arc-striking plate, and then fastened with bolts.

[0040] One end of the extension portion 22 close to the arc-striking piece 21 is connected and fixed by an integral molding, and the other end of the extension portion 22 extends toward one end of the arc-striking piece 21. Since the arc-striking piece 21 and the extension portion 22 are fixedly connected by an integral molding, it is ensured that the extension portion 22 and the arc-striking piece 21 can be firmly fixedly connected, and the arc-striking block 23 is fixed to the upper surface of the extension portion by welding. In this embodiment, the plane of the arc-striking block 23 is in direct contact with the upper surface of the extension portion 22, and can withstand a closing action with a large force value, thereby greatly improving the mechanical life of the switch. In addition, it should be noted that the arc-striking block is made of a triangular solid iron block.

[0041] In order to reliably transfer the arc to the arc extinguishing chamber, an arc striking groove 231 is further provided on the arc striking block 23. The arc striking groove 231 is located on the upper surface of the arc striking block 23, and the arc striking groove 231 is concave toward the center of the arc striking block. The generated arc is transferred into the arc extinguishing chamber along the arc striking groove 231. The arc striking block 23 has strong burning resistance when transferring the arc and can withstand high voltage and high energy arcs.

[0042] In addition, it should be noted that, in order to fix the static contact assembly, it also includes an angle plate 3, which is located on the bus block 11 on the side away from the connecting block. The angle plate 3 is connected and fixed to the bus block 11 through a fixing member, and the static contact assembly is firmly fixed to the base through the angle plate to ensure that it does not shift during opening and closing.

[0043] In order to tightly connect the connecting block 14 and the busbar block 11 to each other, one end of the connecting block 14 is connected to the busbar block 11 by welding. In addition, it should be noted that a fixing hole 111 is also provided on the side of the busbar block 11 close to the connecting block 14. The shape of the fixing hole 111 corresponds one-to-one to the shape of the connecting block 14, so that the connecting block 14 can be installed in the fixing hole 111. In this embodiment, the shape of the fixing hole 111 is a square hole, and the connecting block 14 is a rectangular structure. In the actual production process, the shapes of the fixing hole and the connecting block can also be other shapes according to the product structure, and are not specifically limited.

[0044] In this embodiment, the angle plate 3, the busbar block 11 and the arc-striking assembly 2 are independent components, and the angle plate, the busbar block and the arc-striking plate are fixedly connected by fixing bolts. This structure has a greater cost advantage than the integrated static contact structure.

[0045] 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. A stationary contact structure, characterized in that: The invention comprises: a contact assembly, wherein the contact assembly comprises a busbar block and a main silver point, wherein the main silver point is located at the upper end of the busbar block; The contact assembly further comprises an arc silver point, and the arc silver point is fixedly arranged on the connection block; It also includes an arc striking assembly, which is located near one end of the connecting block, is connected to the busbar block, and is used to introduce an arc into the arc extinguishing chamber; The arc-striking assembly comprises an arc-striking plate, an extension portion is connected to the arc-striking plate, and an arc-striking block is provided on the extension portion.

2. The stationary contact structure according to claim 1, characterized in that: The lower portion of the arc striking block is fixed to the upper surface of the extending portion by welding.

3. The stationary contact structure according to claim 2, characterized in that: The arc striking block is also provided with an arc striking groove.

4. The stationary contact structure according to claim 3, characterized in that: The arc striking block is made of a triangular solid iron block.

5. The stationary contact structure according to claim 3, characterized in that: The arc-striking groove is located on the upper surface of the arc-striking block, and the arc-striking groove is concave toward the center of the arc-striking block.

6. The stationary contact structure according to claim 1, characterized in that: It also includes an angle plate, which is located on the contact on a side away from the connection block, and the angle plate is connected and fixed to the busbar block via a fixing piece.

7. The stationary contact structure according to claim 6, characterized in that: One end of the connection block is connected to the busbar block by welding.

8. The stationary contact structure according to claim 1, characterized in that: A fixing hole is also provided on one side of the busbar block close to the connecting block, and the shape of the fixing hole corresponds to the shape of the connecting block.

9. The stationary contact structure according to claim 7, characterized in that: The angle plate, the busbar block and the arc-starting plate are fixedly connected by fixing bolts.

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