Terminal cover of circuit breaker

Abstract

The utility model relates to a terminal cover of a circuit breaker, which comprises a cover body and a plurality of arc extinguishing sheet groups, a plurality of arc extinguishing cavities are respectively arranged in the cover body, the plurality of arc extinguishing sheet groups are respectively arranged in the plurality of arc extinguishing cavities, one end of the cover body is respectively provided with a plurality of exhaust holes communicated with the plurality of arc extinguishing cavities, and the other end of the cover body is provided with a plurality of air outlets communicated with the plurality of arc extinguishing cavities. The arc extinguishing sheet group comprises an arc extinguishing inner cover arranged in the arc extinguishing cavity and a plurality of arc extinguishing sheets respectively arranged in the arc extinguishing inner cover, two sides of the arc extinguishing inner cover are respectively provided with a plurality of clamping grooves, the arc extinguishing cavity is internally provided with a plurality of clamping convex strips matched with the clamping grooves, the clamping convex strips are clamped in the clamping grooves, and the clamping convex strips are clamped in the clamping grooves. And the arc extinguishing inner cover is clamped and matched with the clamping convex strip. The device has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect, zero flashover and modularization.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a terminal cover of a circuit breaker. Background Art

[0002] At present, the molded case circuit breaker is a commonly used protective electrical appliance. It has the functions of switching on and off load current and overload and short-circuit protection of load current. It is widely used in various power distribution systems and motor overload and short-circuit protection. There are many types of circuit breakers, among which the molded case circuit breaker uses a plastic shell insulator to isolate the conductors or the grounded metal parts. In general use, a terminal cover or plug-in board will be installed at the terminal position of the molded case circuit breaker to prevent the arc generated by the circuit breaker during operation from overflowing and affecting the performance stability of the entire power supply system. In addition, the terminal cover of the circuit breaker can also improve the product's protection, phase-to-phase insulation performance, assembly efficiency, and overall harmony of the appearance. The multiple arc-extinguishing plates inside the terminal cover of the existing circuit breaker cannot be integrated and modularized. Multiple arc-extinguishing plates need to be assembled in the cover body in turn. The assembly is relatively cumbersome, the insulation performance, and the arc-extinguishing capacity are small. In addition, the connection between the multiple arc-extinguishing plates and the cover body is not compact, and the arc-extinguishing plates are easy to loosen and fall off, resulting in unsatisfactory arc-extinguishing effect and the purpose of zero arcing cannot be achieved. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a terminal cover for a modular circuit breaker with simple structure, stable and reliable performance, good arc extinguishing effect, zero arcing.

[0004] To achieve the above-mentioned purpose, the utility model adopts a terminal cover of a circuit breaker, including a cover body and multiple groups of arc-extinguishing sheet groups. The cover body is respectively provided with multiple arc-extinguishing cavities, and the multiple groups of arc-extinguishing sheet groups are respectively arranged in the multiple arc-extinguishing cavities. One end of the cover body is respectively provided with multiple exhaust holes connected with the multiple arc-extinguishing cavities. The arc-extinguishing sheet group includes an arc-extinguishing inner cover arranged in the arc-extinguishing cavity and multiple arc-extinguishing sheets respectively arranged in the arc-extinguishing inner cover. Multiple snap-in grooves are respectively arranged on both sides of the arc-extinguishing inner cover. The arc-extinguishing cavity is respectively provided with snap-in convex strips matching with the multiple snap-in grooves. The snap-in convex strips are snapped in the snap-in grooves to form a snap-in fit between the arc-extinguishing inner cover and the snap-in convex strips.

[0005] The beneficial effects of the above structure are: multiple arc extinguishing pieces are integrated in the arc extinguishing inner cover, and the arc extinguishing piece group adopts a modular structure design, which is conducive to realizing the modular structure design of the terminal cover, and the number of arc extinguishing pieces can be increased according to user needs, the arc extinguishing capacity is larger, the arc extinguishing effect is better, and the purpose of zero arcing can be achieved. In addition, multiple arc extinguishing pieces are arranged in the arc extinguishing cover, and the arc extinguishing pieces are not easy to loosen or fall off, and the reliability is higher. Therefore, the terminal cover has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect, zero arcing, and modularization.

[0006] In particular, the arc extinguishing inner cover is provided with an arc extinguishing channel connected to the arc extinguishing cavity, and positioning slots are respectively provided at both sides of the arc extinguishing piece in the arc extinguishing channel, and the two sides of the arc extinguishing piece are engaged in the positioning slots, and the arc extinguishing inner cover and the arc extinguishing piece are snap-fitted. The arc extinguishing piece and the arc extinguishing inner cover are assembled in a snap-fit ​​manner, and the assembly efficiency is higher.

[0007] In particular, the openings of the positioning slots are respectively provided with guiding slopes that match the arc extinguishing pieces, and one end of the arc extinguishing piece is provided with an insertion guiding surface that matches the guiding slope. The guiding slope guides the arc extinguishing piece, and the arc extinguishing piece can be inserted into the positioning slot along the guiding slope, thereby facilitating the assembly of the arc extinguishing piece and the arc extinguishing inner cover, and the assembly is convenient.

[0008] In particular, the plurality of arc extinguishing pieces are respectively provided with a plurality of through holes, and the through holes of the plurality of arc extinguishing pieces are connected with the arc extinguishing channel. The arc extinguishing piece is arranged in the arc extinguishing channel of the arc extinguishing inner cover, and the arc extinguishing piece can quickly cool and extinguish the arc in the arc extinguishing channel to achieve the purpose of zero arcing.

[0009] In particular, the arc-extinguishing inner cover is provided with fixing plates at positions corresponding to the plurality of snap-fit ​​convex strips, and the fixing plates are provided with screws connected to the snap-fit ​​convex strips. The arc-extinguishing inner cover is fixed to the snap-fit ​​convex strips of the cover body by screws, thereby facilitating the assembly of the arc-extinguishing inner cover and the cover body, and the assembly is more convenient.

[0010] In particular, the other end of the cover is provided with a convex strip for engaging with the circuit breaker. The cover is engaged with the circuit breaker through the convex strip, so that the assembly of the cover and the circuit breaker is convenient and the assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a stereogram of an embodiment of the utility model.

[0012] Figure 2 This is an exploded view of an embodiment of the utility model.

[0013] Figure 3 It is a three-dimensional diagram of the arc-extinguishing plate group according to an embodiment of the utility model.

[0014] Figure 4 It is a three-dimensional diagram of the arc-extinguishing piece according to an embodiment of the utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 4As shown, an embodiment of the utility model is a terminal cover of a circuit breaker, comprising a cover body 10 and a plurality of arc extinguishing sheet groups 20, wherein the cover body 10 is respectively provided with a plurality of arc extinguishing cavities 11, and the plurality of arc extinguishing sheet groups 20 are respectively arranged in the plurality of arc extinguishing cavities 11, and one end of the cover body 10 is respectively provided with a plurality of exhaust holes 12 connected with the plurality of arc extinguishing cavities 11, and the arc extinguishing sheet groups 20 include an arc extinguishing inner cover 21 arranged in the arc extinguishing cavity 11, and a plurality of arc extinguishing sheets 22 respectively arranged in the arc extinguishing inner cover 21, and a plurality of snap-in grooves 211 are respectively arranged on both sides of the arc extinguishing inner cover 21, and snap-in convex strips 111 matching with the plurality of snap-in grooves 211 are respectively arranged in the arc extinguishing cavity 11, and the snap-in convex strips 111 are snapped in the snap-in grooves 211, and constitute a snap-in fit between the arc extinguishing inner cover 21 and the snap-in convex strips 111.

[0016] like Figure 3 and 4 As shown, the arc extinguishing inner cover 21 is provided with an arc extinguishing channel 210 connected to the arc extinguishing cavity 11, and positioning slots 212 are respectively provided at both sides of the arc extinguishing piece 22 in the arc extinguishing channel 210, and the two sides of the arc extinguishing piece 22 are engaged in the positioning slots 212, and constitute the snap-fitting of the arc extinguishing inner cover 21 and the arc extinguishing piece 22. The arc extinguishing piece and the arc extinguishing inner cover are assembled in a snap-fitting manner, and the assembly efficiency is higher. The openings of the positioning slots 212 are respectively provided with guide slopes 213 that match the arc extinguishing piece 22, and one end of the arc extinguishing piece 22 is provided with an insertion guide surface 221 that matches the guide slope 213. The guide slope plays a guiding role for the arc extinguishing piece, and the arc extinguishing piece can be inserted into the positioning slot along the guide slope, thereby facilitating the assembly of the arc extinguishing piece and the arc extinguishing inner cover, and the assembly is convenient. The arc extinguishing pieces 22 are respectively provided with a plurality of through holes 222, and the through holes 222 of the arc extinguishing pieces 22 are connected to the arc extinguishing channel 210. The arc extinguishing pieces are arranged in the arc extinguishing channel of the arc extinguishing inner cover, and the arc extinguishing pieces can quickly cool and extinguish the arc in the arc extinguishing channel to achieve the purpose of zero arcing.

[0017] like Figure 1 and 2 As shown, the arc-extinguishing inner cover 21 is provided with fixing plates 214 at the positions corresponding to the multiple snap-fitting convex strips 111, and the fixing plates 214 are provided with screws 23 connected with the snap-fitting convex strips 111. The arc-extinguishing inner cover is fixed to the snap-fitting convex strips of the cover body by screws, so as to facilitate the assembly of the arc-extinguishing inner cover and the cover body, and the assembly is more convenient. The other end of the cover body 10 is provided with convex strips 101 snap-fitted with the circuit breaker. The cover body is snap-fitted with the circuit breaker by the convex strips, so as to facilitate the assembly of the cover body and the circuit breaker, and the assembly is more convenient.

[0018] Multiple arc extinguishing pieces are integrated in the arc extinguishing inner cover, and the arc extinguishing piece group adopts a modular structure design, which is conducive to realizing the modular structure design of the terminal cover, and the number of arc extinguishing pieces can be increased according to user needs, the arc extinguishing capacity is larger, the arc extinguishing effect is better, and the purpose of zero arcing can be achieved. In addition, multiple arc extinguishing pieces are arranged in the arc extinguishing cover, and the arc extinguishing pieces are not easy to loosen or fall off, and the reliability is higher. Therefore, the terminal cover has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect, zero arcing, and modularization.

Claims

1. A terminal cover of a circuit breaker, characterized in that: It includes a cover body and multiple groups of arc-extinguishing sheet groups. The cover body is respectively provided with multiple arc-extinguishing cavities, and the multiple groups of arc-extinguishing sheet groups are respectively arranged in the multiple arc-extinguishing cavities. One end of the cover body is respectively provided with multiple exhaust holes connected with the multiple arc-extinguishing cavities. The arc-extinguishing sheet group includes an arc-extinguishing inner cover arranged in the arc-extinguishing cavity and multiple arc-extinguishing sheets respectively arranged in the arc-extinguishing inner cover. Multiple snap-in grooves are respectively arranged on both sides of the arc-extinguishing inner cover. The arc-extinguishing cavity is respectively provided with snap-in convex strips matched with the multiple snap-in grooves. The snap-in convex strips are snapped in the snap-in grooves to form a snap-in fit between the arc-extinguishing inner cover and the snap-in convex strips.

2. The terminal cover of the circuit breaker according to claim 1, characterized in that: The arc extinguishing inner cover is provided with an arc extinguishing channel connected to the arc extinguishing cavity, and positioning grooves are respectively provided on both sides of the arc extinguishing channel corresponding to the arc extinguishing piece. The two sides of the arc extinguishing piece are engaged in the positioning grooves, and the arc extinguishing inner cover and the arc extinguishing piece are engaged with each other.

3. The terminal cover of the circuit breaker according to claim 2, characterized in that: The openings of the positioning slots are respectively provided with guiding inclined surfaces matched with the arc extinguishing pieces, and one end of the arc extinguishing piece is provided with an insertion guiding surface matched with the guiding inclined surfaces.

4. The terminal cover of the circuit breaker according to claim 2, characterized in that: A plurality of through holes are respectively arranged on the plurality of arc extinguishing pieces, and the through holes of the plurality of arc extinguishing pieces are connected with the arc extinguishing channels.

5. The terminal cover of the circuit breaker according to claim 1 or 2, characterized in that: The arc-extinguishing inner cover is provided with fixing plates at positions corresponding to the plurality of clamping convex strips, and the fixing plates are provided with screws connected with the clamping convex strips.

6. The terminal cover of the circuit breaker according to claim 1 or 2, characterized in that: The other end of the cover body is respectively provided with convex strips which are engaged with the circuit breaker.

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