Static contact arc striking sheet

Abstract

The utility model relates to a static contact arc strike piece, relates to breaker accessory technical field, including arc strike piece body, contact portion, body portion and mounting portion, contact portion is used for with static contact to guide arc, contact portion one end is fixedly connected with the body portion for with arc extinguishing grid piece contact, and the mounting portion is used for mounting the body portion on the arc extinguishing grid piece. Mounting parts are connected to the two sides of the body part, each mounting part comprises a mounting plate connected with the body part and an elastic block fixedly connected with the mounting plate, and a guide groove is formed between each mounting plate and the corresponding elastic block. According to the utility model, the arc striking sheet can be stably installed in the circuit breaker, so that the problem that the arc striking sheet and a grid sheet in an arc extinguishing cover are short-circuited and the short-circuit protection of the circuit breaker fails due to the deviation of the position of the arc striking sheet is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breaker accessories, and particularly relates to a static contact arc guide piece. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time. When a fault occurs in the circuit, the moving contact and the static contact will separate, causing the circuit to be in an open state. However, an arc is likely to form between the contacts during the separation process. In order to reduce the burning of the contacts by the arc and limit the space for the arc to expand, an arc guide piece needs to be provided to guide the arc to the arc extinguishing chamber to extinguish the arc as soon as possible. Usually, the housing of the circuit breaker forms a space for accommodating the arc guide piece and can place the arc guide piece, but there is no reinforcement structure between the arc guide piece and the housing. Therefore, the arc guide piece is likely to deviate from its normal position, resulting in a short circuit between the arc guide piece and the grid pieces in the arc extinguishing cover.

[0003] For an arc guide piece in the related art, currently, there is a Chinese utility model patent application with a publication date of June 30, 2020 and a publication number of CN210897177U, which discloses an arc guide piece including a main body piece, an arc piece integrally formed on the main body piece, and a positioning piece formed on the other side of the arc piece. A fixing piece is provided on one side of the positioning piece. The fixing piece includes a deformable extrusion piece, and the extrusion piece is respectively closely attached to and movably connected to the opposite side walls of the positioning piece. The extrusion piece can be extruded and positioned at the corresponding installation positions on the positioning piece and inside the circuit breaker housing.

[0004] However, this kind of arc guide piece is closely attached to the side wall of the positioning piece through the deformable extrusion piece, and can be deformed and extruded to be positioned at the corresponding installation positions on the positioning piece and inside the circuit breaker housing, so that the positioning piece is firmly installed inside the circuit breaker housing. After a long time of use, the position of the arc guide piece may deviate, resulting in a short circuit between the arc guide piece and the grid pieces in the arc extinguishing cover, and then it is difficult to ensure timely extinguishing of the arc, causing the short circuit protection of the circuit breaker to fail. Therefore, improvement is needed. Summary of the Invention

[0005] The embodiments of the present application provide a static contact arc guide piece, which can improve the technical problem that the arc guide piece deviates from its normal position and causes the circuit breaker protection to fail in the related art.

[0006] The embodiments of the present application provide a static contact arc guide piece, including an arc guide piece main body, a contact part, a main body part, and an installation part. The contact part is used to contact the static contact to guide the arc. One end of the contact part is fixedly connected to a main body part for contacting the arc extinguishing grid pieces. Installation parts are connected to both sides of the main body part. The installation part includes an installation plate connected to the main body part and an elastic block fixedly connected to the installation plate. A guiding groove is formed between the installation plate and the elastic block.

[0007] In the technical solution described above in the embodiments of the present application, it has at least the following technical effects: After the installation part is installed in the corresponding position of the circuit breaker housing, the elastic block deforms and approaches the mounting plate, so that the installation part can be firmly stuck in the circuit breaker, thereby avoiding the problem that the position of the arc guiding piece shifts, resulting in a short circuit between the arc guiding piece and the grid pieces in the arc extinguishing cover, causing the short-circuit protection of the circuit breaker to fail. At the same time, the process of installing the arc guiding piece is simple, time-saving and labor-saving.

[0008] An arc guiding piece for a static contact provided in the embodiments of the present application can firmly install the arc guiding piece in the circuit breaker through the installation part, thereby avoiding the problem that the position of the arc guiding piece shifts, resulting in a short circuit between the arc guiding piece and the grid pieces in the arc extinguishing cover, causing the short-circuit protection of the circuit breaker to fail. At the same time, the installation part and the insulating part are detachable, and parts can be directly replaced when a certain part of the arc guiding piece is damaged, saving costs. And the setting of the reinforcing strip can also reduce the possibility of the arc guiding piece breaking, improving the service life of the arc guiding piece.

[0009] In some embodiments, the body part and the installation part are connected through an insulating part. The insulating part includes a positioning block and a connecting block. The positioning block is provided with a fixing groove, the body part is arranged in the fixing groove, the connecting block is arranged at the center of the side surface of the positioning block, and the connecting block and the positioning block are integrally formed.

[0010] In some embodiments, a first through hole is provided in the connecting part of the mounting plate and the connecting block, a second through hole communicating with the first through hole is provided in the connecting block, and a connecting bolt is arranged in the first through hole and the second through hole.

[0011] In some embodiments, a first limiting hole is provided in the connecting part of the positioning block and the body part, a second limiting hole communicating with the first limiting hole is provided in the body part, and a limiting bolt is arranged between the first limiting hole and the second limiting hole.

[0012] In some embodiments, the contact part is formed by bending a metal sheet. An arc-shaped surface is formed on the side of the contact part close to the body part, and a reinforcing strip is arranged on the arc-shaped surface and the side of the body part close to the arc-shaped surface.

[0013] In some embodiments, arc guiding teeth are evenly distributed at one end of the body part away from the contact part.

[0014] In some embodiments, stable silver plating layers are provided on both sides of the connecting part of the connecting block, and the material of the arc guiding piece body is nickel-iron alloy. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0016] Figure 1 A three-dimensional structural schematic diagram of a static contact arcing piece provided by an embodiment of the present application;

[0017] Figure 2 is Figure 1 the enlarged view of part A in

[0018] Figure 3 An installation structural schematic diagram of a static contact arcing piece provided by an embodiment of the application.

[0019] Among them, the reference numerals in the figure are as follows:

[0020] 10, contact part; 11, arc surface; 20, body part; 21, arcing teeth; 30, installation part; 31, installation plate; 32, elastic block; 33, guiding groove; 41, arc extinguishing grid piece; 50, insulating part; 51, positioning block; 52, connecting block; 53, fixing groove; 61, first through hole; 62, second through hole; 63, connecting bolt; 71, first limiting hole; 72, second limiting hole; 73, limiting bolt; 81, reinforcing strip. Detailed implementation manners

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the following further details the present application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and do not limit the present application. The terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can also close, carry, and interrupt the current under abnormal circuit conditions within a specified time. When a fault occurs in the circuit, the moving contact and the static contact will separate, causing the circuit to be in an open state. However, an arc is likely to form between the contacts during the separation process. To reduce the burning of the contacts by the arc and limit the space for the arc to expand, an arc guide piece needs to be set to guide the arc to the arc extinguishing chamber to extinguish the arc as soon as possible. Usually, the housing of the circuit breaker forms a space for accommodating the arc guide piece and can place the arc guide piece, but there is no reinforcement structure between the arc guide piece and the housing, so the arc guide piece is likely to deviate from its normal position, resulting in a short circuit between the arc guide piece and the grid pieces in the arc extinguishing cover.

[0029] However, this kind of arc guide piece is closely attached to the side wall of the positioning piece through a deformable extrusion piece, and can be deformed and extruded to be positioned at the corresponding installation positions in the positioning piece and the circuit breaker housing, so that the positioning piece is firmly installed in the circuit breaker housing. After a long time of use, it may cause the position of the arc guide piece to shift, resulting in a short circuit between the arc guide piece and the grid pieces in the arc extinguishing cover, and then it is very difficult to ensure that the arc is extinguished in time, causing the short circuit protection of the circuit breaker to fail. Therefore, improvement is needed.

[0030] Based on this, to improve the problem that the arc guide piece in the related technology deviates from its normal position and causes the circuit breaker protection to fail, the embodiments of the present application provide the following solutions.

[0031] Please refer to Figures 1 to 3 , the embodiments of the present application provide a static contact arc guide piece, including a contact portion 10, a body portion 20, and a mounting portion 30. The contact portion 10 is used to contact the static contact to guide the arc. One end of the contact portion 10 is fixedly connected to a body portion 20 for contacting the arc extinguishing grid piece 41. Both sides of the body portion 20 are connected with a mounting portion 30. The mounting portion 30 includes a mounting plate 31 connected to the body portion 20 and an elastic block 32 fixedly connected to the mounting plate 31. A guiding groove 33 is formed between the mounting plate 31 and the elastic block 32.

[0032] As can be seen from the above, after the mounting portion 30 is installed in the corresponding position of the circuit breaker housing, the elastic block 32 deforms and approaches the mounting plate 31, so that the mounting portion 30 can be firmly stuck in the circuit breaker, thereby avoiding the problem that the position of the arc guide piece shifts, resulting in a short circuit between the arc guide piece and the grid pieces in the arc extinguishing cover, and causing the short circuit protection of the circuit breaker to fail. At the same time, the process of installing the arc guide piece is simple, time-saving and labor-saving.

[0033] In some embodiments, please refer to Figures 1 to 3, the body part 20 and the mounting part 30 are connected by an insulating part 50. The insulating part 50 includes a positioning block 51 and a connecting block 52. The positioning block 51 is provided with a fixing groove 53. The body part 20 is arranged in the fixing groove 53. The connecting block 52 is arranged at the center of the side surface of the positioning block 51, and the connecting block 52 is integrally formed with the positioning block 51.

[0034] With such a setting, when the arc-leading piece is working normally, through the setting of the insulating part 50, it is prevented that the mounting part 30 affects the conduction arc. At the same time, the positioning block 51 is arranged on both sides and the side surface of the body part 20, and the connecting block 52 is arranged on the side surface of the positioning block 51, which will not affect the contact between the body part 20 and the arc extinguishing grid piece 41.

[0035] Optionally, please refer to Figures 1 to 3 , a first through hole 61 is opened at the connecting part of the mounting plate 31 and the connecting block 52. A second through hole 62 communicating with the first through hole 61 is opened on the connecting block 52. A connecting bolt 63 is arranged in the first through hole 61 and the second through hole 62.

[0036] With such a setting, when the connecting part is damaged or the connection effect is not good, the connecting bolt 63 can be directly taken out from the first through hole 61 and the second through hole 62. At this time, the connecting part and the insulating part 50 can be separated, and the old connecting part can be directly replaced, which greatly reduces the required cost compared with directly replacing the whole arc-leading piece.

[0037] In some embodiments, please refer to Figures 1 to 3 , a first limiting hole 71 is opened at the connecting part of the positioning block 51 and the body part 20. A second limiting hole 72 communicating with the first limiting hole 71 is opened on the body part 20. A limiting bolt 73 is arranged between the first limiting hole 71 and the second limiting hole 72.

[0038] With such a setting, on the one hand, the displacement of the insulating block on the body part 20 can be restricted by the limiting bolt 73 to prevent affecting the contact between the body part 20 and the arc extinguishing grid piece 41. On the other hand, if the insulating block has a poor insulating effect or is damaged, the limiting bolt 73 can be taken out from the first limiting hole 71 and the second limiting block. At this time, the insulating part 50 and the body part 20 can be separated, and only the damaged insulating part 50 needs to be replaced, which greatly reduces the required cost compared with directly replacing the whole arc-leading piece.

[0039] Optionally, in some embodiments, please refer to Figure 1 , the contact part 10 is formed by bending a metal sheet. An arc surface 11 is formed on the side of the contact part 10 close to the body part 20. A reinforcing strip 81 is arranged on the side of the body part 20 close to the arc surface 11 and the arc surface 11.

[0040] With such a setting, when the arcing piece is installed on the circuit breaker housing, the arc-shaped surface 11 has a guiding effect, which facilitates embedding the operating structure into the installation groove. At the same time, the reinforcing strip 81 is provided to improve the strength of the contact part 10 and the body part 20, making the arcing piece not easily bent.

[0041] Optionally, please refer to Figures 1 to 3 , and arc-drawing teeth 21 are evenly distributed at one end of the body part 20 away from the contact part 10.

[0042] With such a setting, when the arcing piece is working normally, the contact part 10 guides the electric arc to the arc-drawing teeth 21 of the body part 20. Through the arc-drawing teeth 21, the effect of tip discharge can be achieved, which can quickly extinguish the arc and improve the working efficiency of the arcing piece.

[0043] Optionally, please refer to Figures 1 to 3 , a stable silver plating layer is provided on both sides of the connecting block connecting part, and the material of the arcing piece body is nickel-iron alloy.

[0044] With such a setting, silver plating has good thermal conductivity and electrical conductivity, and strong corrosion resistance. It can quickly conduct away the heat generated by the electric arc, reduce the damage of the electric arc to the moving and static contacts of the circuit breaker, and improve the service life of the contact part 10. At the same time, nickel-iron alloy has strong magnetic conductivity, high strength, and good hot working performance, which can improve the arc-drawing efficiency of the arcing piece.

[0045] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An arc ignition piece for a static contact, characterized in that: It includes an arc starting piece body, a contact part (10), a body part (20) and a mounting part (30). The contact part (10) is used to contact the static contact to guide the arc. One end of the contact part (10) is fixedly connected to the body part (20) which is used to contact the arc extinguishing grid piece (41). Both sides of the body part (20) are connected with the mounting part (30). The mounting part (30) includes a mounting plate (31) connected to the body part (20) and an elastic block (32) fixedly connected to the mounting plate (31). A guiding groove (33) is formed between the mounting plate (31) and the elastic block (32).

2. The arc ignition piece of the static contact according to claim 1, wherein: The body part (20) and the mounting part (30) are connected through an insulating part (50). The insulating part (50) includes a positioning block (51) and a connecting block (52). The positioning block (51) is provided with a fixing groove (53). The body part (20) is arranged in the fixing groove (53). The connecting block (52) is arranged at the center of the side surface of the positioning block (51). The connecting block (52) and the positioning block (51) are integrally formed.

3. The arc ignition piece of the static contact according to claim 1, characterized in that: A first through hole (61) is opened at the connecting part of the mounting plate (31) and the connecting block (52). A second through hole (62) communicated with the first through hole (61) is opened on the connecting block (52). A connecting bolt (63) is arranged in the first through hole (61) and the second through hole (62).

4. A static contact arcing piece according to claim 2, characterized in that: A first limiting hole (71) is opened at the connecting part of the positioning block (51) and the body part (20). A second limiting hole (72) communicated with the first limiting hole (71) is opened on the body part (20). A limiting bolt (73) is arranged between the first limiting hole (71) and the second limiting hole (72).

5. The arcing contact piece for static contact according to claim 4, characterized in that: The contact part (10) is formed by bending a metal sheet. An arc surface (11) is formed on the surface of the contact part (10) close to the body part (20). A reinforcing strip (81) is arranged on the surface of the body part (20) close to the arc surface (11).

6. The arcing contact piece for static contact according to claim 5, characterized in that: Arc starting teeth (21) are evenly distributed at one end of the body part (20) far from the contact part (10).

7. The arcing contact piece for static contact according to claim 4, characterized in that: Stable silver plating layers are arranged on both sides of the connecting part of the connecting block (52). The material of the arc starting piece body is nickel-iron alloy.

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