CN219180438U

CN219180438U - Circuit breaker shell structure and circuit breaker

Info

Publication number: CN219180438U
Application number: CN202223597552.4U
Authority: CN
Inventors: 毛显饶; 宋志文; 莫洪春; 张建奇
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-13
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to a circuit breaker shell structure and a circuit breaker, wherein the circuit breaker shell structure comprises a base, an accessory groove body and a cover body, the accessory groove body is used for accommodating accessories in the circuit breaker, the accessory groove body is detachably connected with the cover body, the cover body is detachably connected with the base, the cover body is matched with the base to cover the accessory groove body, the appearance of the accessory groove body comprehensively considers the space between the cover body and the base and the accessories in the circuit breaker to be accommodated for design, the accessory and the accessory groove body can be omitted when the accessory is not required, and the accessory groove body can be spliced under the cover body when the accessory is required, so that the effect of installing the accessory is achieved, the accessory function is realized, the structure is simplified, the installation is convenient, the cost is reduced, and unnecessary waste is avoided under the condition that a plurality of accessory requirements are not required.

Description

Circuit breaker shell structure and circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker shell structure and a circuit breaker.

Background

Circuit breakers in low voltage electrical appliances, particularly molded case circuit breakers, often require the provision of optional internal accessories for installation and use by the user. These accessories include auxiliary contacts, alarm contacts, shunt release, under-voltage release, etc. As shown in fig. 1, the conventional attachment mounting method is generally a double-layer cover, that is, the middle cover 02 is first mounted with the base 01, then the attachment 03 is mounted in the attachment groove 02a of the middle cover 02, and finally the upper cover 04 is mounted, so as to complete the assembly. Such an assembly method has long been, but has a number of drawbacks, namely that if no accessory is installed, the middle cover is empty, which affects the overall cost of the product, resulting in unnecessary waste.

Disclosure of Invention

A first object of the present utility model is to provide a circuit breaker housing structure, which can reduce the cost and realize the accessory function.

A second object of the present utility model is to provide a circuit breaker employing the above circuit breaker housing structure.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a circuit breaker shell structure, includes base, annex cell body and lid, the annex cell body is used for the inside annex of holding circuit breaker, the annex cell body with the lid can dismantle the connection, the lid with the base cooperation will the annex cell body cover is established in.

Optionally, the cover body is provided with a limiting structure, and the limiting structure is matched with the accessory groove body to limit the accessory groove body.

Optionally, the limit structure is a limit groove adapted to the peripheral edge of the accessory groove body.

Optionally, the cover body is provided with interphase insulation baffle, interphase insulation baffle be used for with the base cooperation to separate each phase insulation, interphase insulation baffle the cover body with the lateral wall that interphase insulation baffle is relative and two backstop walls that set up relatively on the cover body enclose into the spacing groove.

Optionally, the cover body is provided with a supporting wall at one side of the insulating baffle plate, and the supporting wall is in contact fit with the base so as to support the cover body.

Optionally, the accessory cell body with the lid passes through bolted connection, the accessory cell body sets up to be provided with first installation boss towards the surface of lid, first installation boss is provided with the through-hole that runs through first installation boss, the lid orientation the surface of accessory cell body is provided with the second installation boss, the second installation boss is provided with the screw hole, the bolt passes the through-hole with screw hole screw-thread fit will the accessory cell body is fixed in the lid.

Optionally, a countersink is disposed on a surface of the accessory slot body away from the cover body at a position corresponding to the first mounting boss, and the countersink is used for accommodating a nut of the bolt.

Optionally, the base, the annex cell body and the lid encloses into the explosion chamber, the base is in be provided with the gas piece that keeps off in the explosion chamber, one side of gas piece with the annex cell body cooperation is in order to right the annex cell body is spacing, the opposite side of gas piece is used for spacing the moving contact of circuit breaker.

Optionally, be provided with unsmooth cooperation structure between base with the lid, unsmooth cooperation structure is used for right the base with the lid is spacing in order to keep the explosion chamber is stable.

Optionally, the concave-convex mating structure includes:

the groove is arranged on the surface of the cover body opposite to the base;

the boss, the boss set up in the base is used for enclosing into the top surface of a lateral wall of explosion chamber, the boss with the recess cooperation is right the base with the lid is spacing.

A circuit breaker comprising a circuit breaker housing employing the circuit breaker housing structure of any one of the above.

According to the technical scheme, the circuit breaker shell structure comprises a base, an accessory groove body and a cover body, wherein the accessory groove body is used for accommodating accessories in the circuit breaker, the accessories in the circuit breaker comprise auxiliary contacts, alarm contacts, shunt release, under-voltage release and the like, the accessory groove body is detachably connected with the cover body, the connection mode of the accessory groove body and the cover body comprises but not limited to threaded fasteners, plastic rivets, clamping fit and plugging fit, or the accessory groove body and the cover body can be connected by adopting at least two of the combination, the cover body and the base are detachably connected, the connection mode between the cover body and the base comprises but not limited to threaded fasteners, plastic rivets, clamping fit and plugging fit, the accessory groove body can be covered by adopting at least two of the combination of the cover body and the base, and the appearance of the accessory groove body is designed by comprehensively considering the space between the cover body and the base and the accessories in the circuit breaker to be accommodated.

When the circuit breaker is applied, if an accessory is required to be installed, the internal accessory of the circuit breaker is firstly installed in the accessory groove body, then the accessory groove body is detachably connected with the cover body, the accessory groove body and the cover body form a whole, and then the whole formed by the accessory groove body and the cover body is installed on the base through a threaded fastener, a plastic rivet, a clamping fit, a plugging fit and the like to form the circuit breaker; if the accessory is not required to be installed, the accessory groove body can be not installed, the cover body is directly installed to the base through the modes of threaded fasteners, plastic rivets, clamping fit, plugging fit and the like, and the accessory groove body is only used for being matched with the cover body to accommodate accessories in the circuit breaker, so that the functions of the circuit breaker cannot be affected after the accessory groove body is removed, other functions of the circuit breaker can be realized.

The utility model also provides a circuit breaker based on the circuit breaker shell structure, and the circuit breaker adopts the circuit breaker shell structure, so that the circuit breaker is supposed to have the beneficial effects of the circuit breaker shell structure, and the description is omitted here.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a circuit breaker in the prior art;

fig. 2 is an exploded view of a circuit breaker according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a cover of a circuit breaker housing structure according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an accessory slot of a circuit breaker housing structure according to an embodiment of the present utility model;

fig. 5 is a partial cross-sectional view of a circuit breaker with an accessory slot provided in an embodiment of the present utility model;

fig. 6 is a partial cross-sectional view of a circuit breaker without an accessory slot provided by an embodiment of the present utility model.

In fig. 1:

01 is a base; 02 is a middle cover; 02a is an accessory groove; 03 is an accessory; 04 is an upper cover;

in fig. 2 to 6:

1 is a base; 2 is an accessory groove body; 2a is a first mounting boss; 2b is a groove; 3 is a cover body; 3a to a retaining wall; 3b is an interphase insulating baffle; 3c is the side wall of the cover body opposite to the interphase insulating baffle; 3d is a supporting wall; 3e is a groove; 3f is a second mounting boss; 4 is an accessory; 5 is an arc extinguishing chamber; 6 is a gas baffle; 7 is a static contact; 8 is a moving contact; and 9 is a grid sheet.

Detailed Description

One of the key points of the utility model is to provide a circuit breaker shell structure, which is designed to reduce the cost and realize the accessory function.

Another core of the present utility model is to provide a circuit breaker including the above circuit breaker housing structure.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 2 to 4, fig. 2 is an exploded view of a circuit breaker according to an embodiment of the present utility model, fig. 3 is a schematic structural diagram of a cover of a circuit breaker housing structure according to an embodiment of the present utility model, and fig. 4 is a schematic structural diagram of an accessory slot of the circuit breaker housing structure according to an embodiment of the present utility model.

The embodiment of the utility model discloses a circuit breaker shell structure, which comprises a base 1, an accessory groove body 2 and a cover body 3.

The accessory groove body 2 is used for accommodating an accessory 4 inside the circuit breaker, the accessory groove body 2 is provided with a groove part 2b matched with the accessory 4, the circuit breaker inside accessory 4 comprises an auxiliary contact, an alarm contact, a shunt release, an under-voltage release and the like, the accessory groove body 2 is detachably connected with the cover body 3, the connection mode of the accessory groove body 2 and the cover body 3 comprises but is not limited to a threaded fastener, a plastic rivet, clamping fit and inserting fit, or the accessory groove body 2 and the cover body 3 can be connected by adopting at least two of the combination of the above, the cover body 3 and the base 1 can be detachably connected with the base 1, the connection mode between the cover body 3 and the base 1 comprises but is not limited to a threaded fastener, a plastic rivet, clamping fit and inserting fit, the cover body 3 and the base 1 are matched to cover the accessory groove body 2, the appearance of the accessory groove body 2 is comprehensively considered, the space between the cover body 3 and the base 1 and the circuit breaker inside accessory 4 to be accommodated are designed, a hollowed-out structure can be arranged according to requirements, the accessory groove body 2 can be conveniently connected with the circuit breaker inside the circuit breaker, and the circuit breaker inside the circuit breaker can be designed, and the accessory groove body 4 can be opened in the corresponding type of the circuit breaker inside the circuit breaker can be designed, and the circuit breaker inside the circuit breaker can be opened according to the type of the circuit breaker inside the circuit breaker can be opened, and the type of the circuit breaker can be opened, and the circuit breaker inside the circuit breaker can be opened and the corresponding type can be opened and the circuit breaker inside the circuit breaker.

When the circuit breaker is applied, if the accessory 4 needs to be installed, the internal accessory 4 of the circuit breaker is firstly installed in the accessory groove body 2, then the accessory groove body 2 is detachably connected with the cover body 3, the accessory groove body 2 and the cover body 3 form a whole, and then the whole formed by the accessory groove body 2 and the cover body 3 is installed on the base 1 in a threaded fastener, a plastic rivet, a clamping fit, a plugging fit and other modes to form the circuit breaker, as shown in fig. 5.

If the accessory 4 is not required to be mounted, the accessory groove body 2 can be omitted, the cover body 3 can be directly mounted on the base 1 through a threaded fastener, a plastic rivet, a clamping fit, a plugging fit and the like, and the accessory groove body 2 is only used for being matched with the cover body 3 to accommodate the accessory 4 inside the circuit breaker, so that the function of the circuit breaker is not affected after the accessory groove body 2 is removed, and other functions of the circuit breaker can be realized, as shown in fig. 6.

Compared with the prior art, the circuit breaker shell structure provided by the embodiment of the utility model can be used for not installing the accessory 4 and the accessory groove body 2 when the accessory 4 is not required, and can be used for installing the accessory 4 by installing the lower spliced accessory groove body 2 on the cover body 3 when the accessory 4 is required, so that the effect of installing the accessory 4 is achieved, the structure is simplified, the installation is convenient, the cost is reduced, and unnecessary waste is avoided when the accessory 4 is realized.

It is foreseen that the space in the circuit breaker housing is not abundant, so that the accurate positioning and mounting of the accessory slot body 2 has an important influence on the overall mounting of the circuit breaker housing structure, and in order to facilitate the positioning and mounting of the accessory slot body 2 on the cover body 3, a limiting structure can be arranged on the cover body 3 and matched with the accessory slot body 2 to limit the accessory slot body 2, and the limiting structure can be a limiting slot or a limiting protrusion.

Specifically, in the embodiment of the present utility model, referring to fig. 3, the limiting structure is a limiting groove disposed on the cover 3 and adapted to the peripheral edge of the accessory slot 2, and when the accessory slot 2 is installed, the accessory slot 2 is matched with the limiting groove to position the accessory slot 2.

Further optimize above-mentioned technical scheme, as shown in fig. 3, lid 3 is provided with interphase insulation baffle 3b, interphase insulation baffle 3b is used for cooperating with base 1, in order to separate each phase insulation, avoid interphase short circuit, this interphase insulation baffle 3b is still used for enclosing into above-mentioned spacing groove simultaneously, namely interphase insulation baffle 3b, lid 3 and the lateral wall 3c that interphase insulation baffle 3b is relative and two backstop walls 3a that set up on the lid 3 enclose into spacing groove, backstop wall 3a is the local surface of lid 3 towards base 1 to the direction protrusion of keeping away from base 1 and with the lid 3 the step face that forms between the other surfaces towards base 1.

Preferably, the cover 3 is provided with a supporting wall 3d on the side of the interphase insulating barrier 3b, and the supporting wall 3d is in contact fit with the base 1 to support the cover 3, so that the cover 3 is not easy to deform when an external force is applied.

As a preferred embodiment of the present utility model, the accessory slot 2 and the cover 3 are connected by a bolt, as shown in fig. 3 and 4, the surface of the accessory slot 2 facing the cover 3 is provided with a first mounting boss 2a, the first mounting boss 2a is provided with a through hole penetrating through the first mounting boss 2a, the surface of the cover 3 facing the accessory slot 2 is provided with a second mounting boss 3f, the second mounting boss 3f is provided with a threaded hole, preferably a blind hole, so as to avoid forming a hole on the outer surface of the cover 3, and during installation, as shown in fig. 2 and 5, under the limiting action of the limiting structure, the first mounting boss 2a is aligned with and abutted against the end surface of the second mounting boss 3f, the bolt passes through the through hole and is in threaded fit with the threaded hole to fix the accessory slot 2 to the cover 3, and the structural design of the first mounting boss 2a and the second mounting boss 3f can increase the length of the through hole and the threaded hole, thereby increasing the fitting area of the accessory slot 2 and the cover 3 and the bolt, and enhancing the stability of the connection.

Further optimize above-mentioned technical scheme, as shown in fig. 5, the surface that annex cell body 2 kept away from lid 3 is provided with the heavy groove in the position that corresponds first installation boss 2a, and the heavy groove is used for holding the nut of bolt, avoids the nut of bolt to expose, reduces the space occupation of bolt in circuit breaker housing structure, gives up the space for other parts or structures in the circuit breaker.

It is easy to understand that when the moving contact 8 of the circuit breaker is separated from the fixed contact 7, an abnormal current is broken, and at this time, an arc is generated between the moving contact 7 and is ejected outwards, and meanwhile, high-temperature and high-pressure gas and the like are accompanied, and the ejected arc and the ejected high-temperature and high-pressure gas are liable to cause problems such as phase-to-phase breakdown and ablation of parts, so that the arc extinguishing chamber 5 for alleviating or even avoiding the problems is generally arranged in the circuit breaker, and the circuit breaker housing structure provided by the embodiment of the utility model is not exceptional.

As shown in fig. 5 and 6, the base 1, the accessory groove body 2 and the cover body 3 enclose an arc extinguishing chamber 5, the arc extinguishing chamber 5 is used for accommodating an arc extinguishing component, the fixed contact 7 is fixedly arranged in the arc extinguishing chamber 5, the movable contact 8 is rotatably arranged on the base 1, the matching end of the movable contact 8 and the fixed contact 7 stretches into the arc extinguishing chamber 5, the movable contact 8 contacts or separates from the fixed contact 7 to realize the closing and opening of a circuit breaker, thereby controlling the on-off of a circuit of the circuit breaker, the arc extinguishing component comprises a plurality of grid plates 9, the arrangement structure of each grid plate 9 is consistent with the movement track of the movable contact 8, the grid plates 9 are used for guiding an arc to an air outlet of the circuit breaker shell, the air outlet can be arranged at the position of the base 1 and/or the cover body 3 opposite to the grid plates 9, the base 1 is provided with an air blocking piece 6 in the arc extinguishing chamber 5, one side of the gas blocking piece 6 is matched with the accessory groove body 2 to limit the accessory groove body 2, so that the base 1 and the cover body 3 can limit the accessory groove body 2 at the same time, namely, when the accessory groove body 2 needs to be installed, the base 1 and the cover body 3 can be positioned through the accessory groove body 2, the installation of the base 1 and the cover body 3 is facilitated, the other side of the gas blocking piece 6 is used for limiting a moving contact 8 of the circuit breaker, when the moving contact 8 of the circuit breaker is disconnected with a fixed contact 7 through short circuit, the moving contact 8 of the circuit breaker can be repelled upwards due to the action of electric repulsive force, at the moment, the moving contact is blocked by the gas blocking piece 6, the moving contact is prevented from being reset after being repelled, and the next closing is not conducted, in the traditional design of the prior art, the function is required to be formed by the stop feature on the middle cover, so that the gas blocking piece 6 can replace the stop feature on the middle cover, and the normal function of the circuit breaker is prevented from being influenced by the middle cover.

Further optimize above-mentioned technical scheme, when the demand of installing annex 4 is not being had, can not carry out spacingly to base 1 and lid 3 through annex cell body 2, consequently in the embodiment of the utility model still be provided with unsmooth cooperation structure between base 1 and the lid 3, unsmooth cooperation structure is used for spacing to base 1 and lid 3 in order to keep explosion chamber 5 stable, is convenient for the installation of lid 3 and base 1 under the condition that does not have annex cell body 2 simultaneously.

Specifically, the concave-convex matching structure comprises a groove 3e and a boss, wherein, as shown in fig. 3, the groove 3e is arranged on the surface of the cover body 3 opposite to the base 1, the boss is arranged on the top surface of one side wall of the base 1 for enclosing the arc extinguishing chamber 5, and the boss is matched with the groove 3e to limit the base 1 and the cover body 3.

The embodiment of the utility model also provides a circuit breaker, which comprises a circuit breaker shell, wherein the circuit breaker shell adopts the circuit breaker shell structure in the embodiment, and the circuit breaker shell adopts the circuit breaker shell structure in the embodiment, so that the technical effect of the circuit breaker is that the circuit breaker is disclosed in the embodiment.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a circuit breaker shell structure, its characterized in that includes base (1), annex cell body (2) and lid (3), annex cell body (2) are used for holding inside annex (4) of circuit breaker, annex cell body (2) with lid (3) can dismantle and be connected, lid (3) with base (1) cooperation will annex cell body (2) cover is established in.

2. The circuit breaker housing structure according to claim 1, characterized in that the cover body (3) is provided with a limit structure, which cooperates with the accessory slot body (2) to limit the accessory slot body (2).

3. Circuit breaker housing structure according to claim 2, characterized in that the limit structure is a limit groove adapted to the peripheral edge of the accessory groove body (2).

4. A circuit breaker housing structure according to claim 3, wherein the cover (3) is provided with an inter-phase insulating barrier (3 b), the inter-phase insulating barrier (3 b) being adapted to cooperate with the base (1) to insulate the phases apart, the inter-phase insulating barrier (3 b), a side wall (3 c) of the cover (3) opposite to the inter-phase insulating barrier (3 b) and two stop walls (3 a) provided opposite to the cover (3) enclosing the limit slot.

5. The circuit breaker housing structure according to claim 4, wherein the cover body (3) is provided with a supporting wall (3 d) at one side of the interphase insulating shutter (3 b), and the supporting wall (3 d) is in contact fit with the base (1) to support the cover body (3).

6. The circuit breaker housing structure according to any one of claims 1-5, wherein the accessory slot body (2) is connected with the cover body (3) through a bolt, a first mounting boss (2 a) is arranged on the surface of the accessory slot body (2) facing the cover body (3), a through hole penetrating through the first mounting boss (2 a) is arranged on the first mounting boss (2 a), a second mounting boss (3 f) is arranged on the surface of the cover body (3) facing the accessory slot body (2), a threaded hole is arranged on the second mounting boss (3 f), and the bolt penetrates through the through hole and is in threaded fit with the threaded hole to fix the accessory slot body (2) to the cover body (3).

7. Circuit breaker housing structure according to claim 6, characterized in that the surface of the accessory channel (2) remote from the cover (3) is provided with a countersink for receiving the nut of the bolt in a position corresponding to the first mounting boss (2 a).

8. The circuit breaker housing structure according to any one of claims 1-5 and 7, wherein the base (1), the accessory slot body (2) and the cover body (3) enclose an arc extinguishing chamber (5), the base (1) is provided with a gas blocking member (6) in the arc extinguishing chamber (5), one side of the gas blocking member (6) cooperates with the accessory slot body (2) to limit the accessory slot body (2), and the other side of the gas blocking member (6) is used for limiting a moving contact of the circuit breaker.

9. Circuit breaker housing structure according to claim 8, characterized in that a male-female mating structure is provided between the base (1) and the cover (3), said male-female mating structure being used for limiting the base (1) and the cover (3) to keep the arc-extinguishing chamber (5) stable.

10. The circuit breaker housing structure of claim 9 wherein said male-female mating structure comprises:

the groove (3 e) is formed in the surface, opposite to the base (1), of the cover body (3);

the boss is arranged on the top surface of one side wall of the base (1) for enclosing the arc extinguishing chamber (5), and the boss is matched with the groove (3 e) to limit the base (1) and the cover body (3).

11. A circuit breaker comprising a circuit breaker housing, characterized in that the circuit breaker housing adopts a circuit breaker housing structure according to any of claims 1-10.