CN220474548U - Shell assembly and circuit breaker - Google Patents

Abstract

The embodiment of the application provides a shell assembly. The housing assembly is mounted to the circuit breaker body. A plurality of pole chambers are arranged in the breaker body. The shell assembly comprises a cover body, the cover body is arranged on the breaker body, an inner cavity of the cover body is communicated with the plurality of pole chambers, a cavity spacing plate is arranged in the inner cavity and used for isolating arcs exhausted from the different pole chambers. According to the embodiment of the application, the cover body comprising the cavity spacing plate is arranged on the circuit breaker body, so that the cavity spacing plate can isolate arcs entering the inner cavity of the cover body from different pole chambers, and the possibility that the arcs of the different pole chambers are contacted outside the circuit breaker body is reduced. Further, under the condition that the possibility that the electric arcs of the different pole chambers are contacted outside the breaker body is small, the possibility that the electric circuits in the different pole chambers are short-circuited is also small, and the use safety of the breaker is improved.

Description

Shell assembly and circuit breaker

Technical Field

The embodiment of the application relates to the technical field of power distribution equipment, in particular to a shell assembly and a circuit breaker.

Background

The frame breaker comprises a breaker body, wherein the breaker body is used for switching on, carrying and breaking current under normal circuit conditions, and switching on, carrying for a certain time and breaking current under abnormal circuit conditions.

When the breaker body breaks current, an arc carrying conductive particles can be generated along with the separation of the movable contact and the fixed contact in the pole chamber. And, as the arc spreads, the arc may be discharged to the outside of the breaker body. When the arcs discharged from the different pole chambers contact the outside of the breaker body, the multi-pole circuit of the breaker body is short-circuited, affecting the use of the breaker body.

Disclosure of Invention

In view of the above, embodiments of the present application provide a housing assembly and a circuit breaker capable of reducing the possibility of arc contact discharged from different arc extinguishing chambers.

In a first aspect, embodiments of the present application provide a housing assembly. The housing assembly is mounted to the circuit breaker body. A plurality of pole chambers are arranged in the breaker body. The shell assembly comprises a cover body, the cover body is arranged on the breaker body, an inner cavity of the cover body is communicated with the plurality of pole chambers, a cavity spacing plate is arranged in the inner cavity and used for isolating arcs exhausted from the different pole chambers.

The technical problem that the electric arcs discharged from different pole chambers of the breaker body are easy to contact to conduct the electric circuits of the different pole chambers in the prior art is considered. According to the embodiment of the application, the cover body comprising the cavity spacing plate is arranged on the circuit breaker body, so that the cavity spacing plate can isolate arcs entering the inner cavity of the cover body from different pole chambers, and the possibility that the arcs of the different pole chambers are contacted outside the circuit breaker body is reduced.

Further, under the condition that the possibility that the electric arcs of the different pole chambers are contacted outside the breaker body is small, the possibility that the electric circuits in the different pole chambers are short-circuited is also small, and the use safety of the breaker is improved.

In an alternative, a compartment spacer is provided between adjacent pole compartments, one compartment spacer being opposite to one compartment spacer.

Through the scheme, at least one cavity spacing plate is arranged between the electric arcs discharged from any two pole chambers, and the cavity spacing plate can isolate the electric arcs discharged from any two pole chambers, so that the isolation efficiency of the cavity spacing plate on the electric arcs is greatly improved.

In an alternative form, the side of the chamber spacing plate adjacent to the chamber spacing plate is in abutment with the chamber spacing plate.

By the scheme, after the cavity spacing plate is attached to the chamber spacing plate, gaps are not formed between the cavity spacing plate and the chamber spacing plate due to attachment, and electric arcs discharged from different chambers cannot pass through and contact the cavity spacing plate and the chamber spacing plate.

In an alternative way, the side of the cover facing the breaker body is in abutment with the side of the breaker body facing the cover.

Through above-mentioned scheme, after circuit breaker body and the cover body laminating, can not have the clearance because of laminating between the two, the electric arc of discharging from different pole rooms can not pass and contact between circuit breaker body and the cover body.

In an alternative mode, in the first direction, both ends of the cavity spacing plate are attached to the inner wall of the cover body; the first direction is perpendicular to the arrangement direction of the breaker body and the cover body, and the first direction is perpendicular to the arrangement direction of the plurality of pole chambers.

Through above-mentioned scheme, through setting up the both ends of chamber division board to all laminating with the inner wall of the cover body for can not have the clearance because of laminating between chamber division board and the inner wall of the cover body, follow different pole room exhaust electric arc can not pass and contact between chamber division board and the cover body.

In an alternative, the side of the compartment partition remote from the compartment partition extends to the end of the cover remote from the breaker body.

Through the scheme, the conductive particles in the electric arc can be adsorbed by the inner wall of the cover body or intercepted by parts arranged in the cover body, so that the influence of the electric arc on other parts (a rear wiring row, a control loop wiring and the like) on the discharge side of the cover body is reduced or even avoided.

In an alternative, the side of the compartment partition remote from the compartment partition extends beyond the end of the cover remote from the breaker body.

Through above-mentioned scheme, the electric arc can be in the cover body outside of one side of keeping away from the circuit breaker body again remove certain distance to at the in-process that the electric arc removed, the chamber division board still can keep apart the electric arc, in order to further reduce the possibility that the electric arc kept away from the outside contact of circuit breaker body at the cover body.

In an alternative, the housing assembly further includes an end cap mounted to a side of the cover remote from the circuit breaker body.

Through the scheme, the end cover can intercept conductive particles carried in the electric arc reaching the discharge side of the cover body, so that the conductive particles in the electric arc discharged from the discharge side are further reduced or disappeared, and the electric arc is less discharged or not discharged from the side, far away from the breaker body, of the cover body, and the influence of the electric arc on the external environment in the arc extinguishing process of the breaker is reduced or stopped.

In an alternative, the end cap is attached to the cavity spacer plate.

Through the scheme, the end cover and the cavity spacing plate are attached without gaps, so that an electric arc reaching one side of the cover body, which is far away from the circuit breaker body, cannot pass through and contact with the cavity spacing plate and the end cover.

In a second aspect, embodiments of the present application also provide a circuit breaker. The circuit breaker includes a circuit breaker body and a housing assembly of the first aspect, the housing assembly being mounted to the circuit breaker body.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following detailed description of the present application will be presented in order to make the foregoing and other objects, features and advantages of the embodiments of the present application more understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an interrupt router according to some embodiments of the present application.

Fig. 2 is an exploded view of an interrupt router according to some embodiments of the present application.

Fig. 3 is an exploded view of a housing assembly in some embodiments of the present application.

Fig. 4 is a schematic view of a cover according to some embodiments of the present application.

Fig. 5 is a schematic view of a baffle, a circuit breaker body, and a cover in some embodiments of the present application.

Fig. 6 is a schematic view of a slider and a stopper on a cover in some embodiments of the present application.

Fig. 7 is a schematic view of an end cap in some embodiments of the present application.

Reference numerals illustrate:

1-a circuit breaker;

11-a breaker body; g-sliding rails;

12-a housing assembly; 121-a cover; 1210-lumen; 1211-a cavity spacer plate; k-sliding blocks; an X-limited block; 122-a buffer plate; 1221-buffer holes; 123-end caps; 1231-interception; 1232-exhaust; 1233-ribs;

13-a baffle;

k1-a first well; k2—a second well; k3-third well; k4-fourth well; k5-fifth well; k6-sixth well;

y-first direction.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the drawings are intended to cover a non-exclusive inclusion.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. For example, in the description of the present application, the terms "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or elements in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

Further, expressions of directions such as Y direction and the like for explaining the operations and configurations of the respective members of the present embodiment are not absolute but relative, and although these directions are appropriate when the respective members are in the positions shown in the drawings, when these positions are changed, these directions should be interpreted differently to be changed correspondingly.

Furthermore, the terms first, second and the like in the description and in the claims of the present application or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to expressly or implicitly include one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., the terms "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., the physical connection may be a fixed connection, e.g., by a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The frame circuit breaker is a switching device applied to a low-voltage distribution system and used for distributing electric energy and protecting an electric power system and electric equipment. The frame circuit breaker distributes electric energy through the circuit breaker body, protects the power system and the power equipment.

The breaker body includes a plurality of pole chambers, and a circuit including a pair of moving contacts and a stationary contact is provided in each pole chamber. The breaker body realizes the protection of the power system and the power equipment through the separation of the moving contact and the fixed contact. However, an arc carrying conductive particles and high-temperature gas is generated in the process of separating the moving contact from the fixed contact, and the arc may be discharged outside the circuit breaker body. When the arcs of the different pole chambers come into contact outside the breaker body, the conductive particles in the arcs may turn on the circuit of the different pole chambers.

Based on this, embodiments of the present application provide a housing assembly that isolates arcs exiting different pole chambers by means of a cavity spacer plate in the housing assembly.

In order to better understand the technical solutions of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings.

Referring to fig. 1 and 2, an embodiment of the present application provides a circuit breaker 1. The circuit breaker 1 comprises a circuit breaker body 11 and a housing assembly 12. The housing assembly 12 is mounted to the circuit breaker body 11.

The breaker body 11 is provided therein with a plurality of pole chambers, each of which is provided with a pair of moving and stationary contacts to break a circuit in the pole chamber by separation of the moving and stationary contacts. The number of the pole chambers can be two, three, four or more than four, and the like, and the number of the corresponding pairs of the movable contact and the fixed contact is the same as that of the pole chambers. Furthermore, each pole chamber may be provided with an arc extinguishing chamber for extinguishing an arc generated when the movable contact and the stationary contact are separated by the arc extinguishing chamber. Wherein, the explosion chamber can set up in the one side of utmost point room to, a plurality of explosion chambers can be located the homonymy of a plurality of utmost point rooms.

Referring to fig. 2 and 3, the housing assembly 12 includes a cover 121 provided with an inner cavity 1210, the cover 121 is mounted with the circuit breaker body 11, and the inner cavity 1210 is in communication with a plurality of pole chambers of the circuit breaker body 11, so that arcs generated in different pole chambers can enter the inner cavity 1210 without being randomly diffused outside the circuit breaker body 11, and components (e.g., a rear wiring harness, a control loop wiring, etc.) disposed outside the circuit breaker body 11 are affected.

Wherein, when the cover body 121 is installed in the breaker body 11, can install in the one side that the breaker body 11 set up the explosion chamber, also can install in the offside of explosion chamber, can also install respectively in the one side that the breaker body 11 set up the explosion chamber and the offside of explosion chamber, this application embodiment does not do special limitation to this, as long as the electric arc in a plurality of polar rooms can get into the inner chamber 1210.

With continued reference to fig. 2 and 3, a cavity spacer 1211 is disposed within the cavity 1210 of the housing 121. The cavity spacer 1211 is made of an insulating material, which may be rubber or plastic, etc. The cavity spacer 1211 made of an insulating material may be disposed at the arc discharge ends of the different pole chambers and shielded between the arcs discharged at the different discharge ends to isolate the arcs discharged at the different discharge ends from contact with each other.

In summary, the technical problem of short-circuiting the electric circuits of the different pole chambers is considered in the prior art that the electric arcs discharged from the different pole chambers of the breaker body 11 are easily contacted. The present embodiment enables the cavity spacer plate 1211 to isolate the arcs from the different pole chambers into the inner cavity 1210 of the cavity 121 by installing the cavity spacer plate 1211 on the circuit breaker body 11, so as to reduce the possibility that the arcs from the different pole chambers contact outside the circuit breaker body 11.

Further, in the case where the possibility that the arcs of the different pole chambers come into contact outside the breaker body 11 is small, the possibility that the circuits in the different pole chambers are short-circuited is also small, which is advantageous in improving the safety of the use of the breaker 1.

In the above embodiment, the mounting manner of the cover 121 and the breaker body 11 may be a snap connection, a pin connection, or a connection of the slide rail G and the slider K, which is not particularly limited in this application.

For example, when the cover 121 and the breaker body 11 are connected with the sliding rail G and the sliding block K, referring to fig. 4, the surface of the breaker body 11 facing the cover 121 may be provided with the sliding rail G, the surface of the cover 121 facing the breaker body 11 may be provided with the sliding block K adapted to the sliding rail G, and the sliding block K may be mounted in the sliding rail G and slide in the sliding rail G, so that the cover 121 is mounted on the breaker body 11. The cross-sectional shape of the sliding rail G may be a "T" shape, an "Ω" like shape, a funnel-like shape, or the like, which is not particularly limited in the embodiment of the present application.

Further, referring to fig. 5, in the sliding direction of the slider K, a limiting block X is further disposed at an end of the slider K, where the limiting block X can limit the position of the slider K in the sliding rail G, and further limit the mounting position of the cover 121 on the breaker body 11.

Still further, referring to fig. 4, a side of the circuit breaker body 11 where the wiring busbar is disposed may be further provided with a baffle 13 having a plurality of external partitions. After the cover 121 is mounted on the breaker body 11, an external partition plate can be located between adjacent wiring bus bars to separate the two-pole wiring bus bars. The baffle 13 can be attached to the cover body 121, a first hole K1 can be formed in the baffle 13, a second hole K2 opposite to the first hole K1 can be formed in the cover body 121, and one end of a screw can penetrate through the second hole K1 and be fixed in the first hole K2 so as to fix the cover body 121 after the cover body 121 is fixed to the mounting position of the circuit breaker body 11.

In addition, there may be a variety of ways of communication between the inner cavity 1210 and the plurality of pole chambers. For example, when the inner cavity 1210 includes the same number of subchambers as the number of pole chambers, one pole chamber may be correspondingly communicated with one subchamber. For another example, one pole chamber may be in communication with one or more subchambers (e.g., two, three, or four) when the inner chamber 1210 includes a greater number of subchambers than the number of pole chambers. The embodiment of the present application is not particularly limited thereto.

Further, when the arrangement of the chamber partition plate 1211 in the inner chamber is different, the shape of the subchamber is also different.

Illustratively, in the case where an angle is formed between the surface of the chamber partition plate 1211 and the arrangement direction of the breaker body 11 and the cover 121, and the shape of the inner chamber 1210 is a rectangular parallelepiped, the cross-sectional shape of the subchamber may be a diamond or trapezoid, or the like. In the case where the surface on which the chamber separation plate 1211 is located is coplanar with the surface on which the chamber separation plate is located, and the shape of the inner chamber 1210 is a rectangular parallelepiped, the shape of the subchamber may be a rectangular parallelepiped.

In addition, the cavity spacer 1211 may be connected to the cover 121 in various manners, for example, the cavity spacer 1211 may be integrally provided to the cover 121, or may be detachably connected to the cover 121, which is not particularly limited in the embodiment of the present application. Illustratively, when the spacer 1211 is removably coupled to the housing 121, the walls of the inner cavity 1210 may be provided with slots into which one side of the spacer 1211 may be inserted to effect coupling of the spacer 1211 to the housing 121.

In the above embodiment, after the cover 121 is mounted on the breaker body 11, the cavity partition 1211 in the cover 121 and the compartment partition of the breaker body 11 may have various corresponding relations. The possible correspondence of the chamber separation plate 1211 and the chamber separation plate is exemplarily described below.

In some embodiments, one compartment divider plate is opposite one compartment divider plate 1211.

Wherein the compartment partition plate is opposite to the cavity partition plate 1211 means: the chamber partition plate is opposite to the position of the chamber partition plate 1211 in the arrangement direction of the circuit breaker body 11 and the cover 121. Specifically, the portion of the compartment partition plate opposite to the compartment partition plate 1211 may be a face of the compartment partition plate facing the compartment partition plate 1211. The portion of the chamber partition plate 1211 facing the chamber partition plate may be a surface of the chamber partition plate 1211 facing the chamber partition plate, or may be a surface of the chamber partition plate 1211 adjacent to a surface facing the chamber partition plate, which is not particularly limited in this application.

Further, the compartment partition plate being opposite to the compartment partition plate 1211 includes being partially opposite or being entirely opposite. The partial opposition may be that the face of the compartment partition plate facing the compartment partition plate 1211 is in direct opposition to the face of the compartment partition plate 1211 facing the compartment partition plate. All of the faces may be entirely opposite to the faces of the compartment partition plates that face the compartment partition plates 1211 and the faces of the compartment partition plates 1211 that face the compartment partition plates.

In this embodiment, assume that: the pole chamber comprises a first pole chamber, a second pole chamber and a third pole chamber, a first chamber spacing plate is arranged between the first pole chamber and the second pole chamber, and a second chamber spacing plate is arranged between the second pole chamber and the third pole chamber; the cavity spacer plate 1211 includes a first cavity spacer plate and a second cavity spacer plate. The first compartment divider may then be opposite the first compartment divider and the second compartment divider may be opposite the second compartment divider.

Based on this correspondence, it can be found that the first cavity spacer plate is capable of isolating the arc from the first pole chamber and the arc from the second pole chamber, and the second cavity spacer plate is capable of isolating the arc from the second pole chamber and the arc from the third pole chamber. That is, there is at least one cavity spacer 1211 between the arcs discharged from any two pole chambers, and the cavity spacer 1211 can isolate the arcs discharged from any two pole chambers. In this way, the efficiency of the isolation of the arc by the cavity spacer 1211 can be greatly improved.

In other embodiments, some of the compartment partition plates may have the compartment partition plate 1211 opposite thereto, and another part may not have the compartment partition plate 1211 opposite thereto.

In this embodiment, assume that: the pole chamber comprises a first pole chamber, a second pole chamber and a third pole chamber, a first chamber spacing plate is arranged between the first pole chamber and the second pole chamber, and a second chamber spacing plate is arranged between the second pole chamber and the third pole chamber; the cavity spacer plate 1211 includes only the first cavity spacer plate. Then, only the first compartment partition plate is opposed to the first compartment partition plate, and no compartment partition plate 1211 is opposed to the second compartment partition plate.

Based on this correspondence, although the chamber separation plate 1211 can isolate only the arc discharged from a part of the polar chambers, it is undeniable that the chamber separation plate 1211 can also play a role in isolating the arc discharged from a different polar chamber.

In the process that the arcs of different pole chambers enter the inner cavity 1210 of the cover 121 and are discharged from the cover 121, it is assumed that a side of the cover 121 close to the breaker body 11 is an entrance side of the arcs, a side of the cover 121 remote from the breaker body 11 is an discharge side of the arcs, and a portion between the entrance side and the discharge side is a treatment section of the arcs. Then, as the processing section processes the arc, the concentration of the conductive particles in the arc gradually decreases, that is, the arc on the entrance side is more likely to conduct than the arc on the processing section, and the arc on the processing section is more likely to conduct than the arc on the discharge side.

Wherein the processing of the electric arc by the processing section comprises the adsorption and interception of conductive particles in the electric arc. Specifically, when the processing section is not provided with other members, the inner wall of the processing section may adsorb the conductive particles. When the treatment section is provided with other components, the other components may adsorb and intercept the conductive particles.

When the processing section is provided with other components, for example, please continue with reference to fig. 3, the other components may be a buffer plate 122. The plate surface of the buffer plate 122 may be perpendicular to the moving direction of the arc to adsorb and intercept the conductive particles. Wherein the buffer plate 122 may be made of an insulating material and/or a metallic material; when the buffer plate 122 is made of a metal material, the buffer plate 122 may buffer, adsorb, and intercept the conductive particles; when the buffer plate 122 is made of an insulating material, the buffer plate 122 may buffer and intercept the conductive particles.

The buffer plate 122 may be integrally connected to the processing section of the cover 121, or may be detachably mounted to the processing section of the cover 121. The removable connection may include a screw connection. For example, in the opening direction of the inner cavity 1210, a mounting post Z having a third hole K3 may be provided on the cover 121, a fourth hole K4 may be provided on the buffer plate 122 opposite to the third hole K3, and a screw may pass through the fourth hole K4 and be fixed in the third hole K3 to fix the buffer plate 122 on the cover 121.

Further, as shown in fig. 3, one or more buffer holes 1221 may be provided in the buffer plate 122. The buffer hole 1221 may facilitate the passage of high temperature gas carried in the arc, avoiding the accumulation of high temperature gas between the breaker body 11 and the buffer plate 122.

Based on the concentration distribution relationship of the conductive particles in the arc at different positions of the cover 121, the embodiment of the application is designed by the position relationship of the cover 121 and the breaker body 11 and the structure of the cover 121 so as to improve the isolation efficiency of the cavity spacer 1211 to the arc discharged from different pole chambers.

In some embodiments, the side of the chamber spacing plate 1211 adjacent to the chamber spacing plate is positioned to conform to the chamber spacing plate. (not shown in the drawings)

Wherein the side of the chamber partition 1211 adjacent to the chamber partition is the same side as the entrance side of the hood 121.

Because of the high concentration of conductive particles in the arc on the entrance side of the enclosure 121, it is critical to position the chamber and compartment separating plates 1211, 1211 on the entrance side of the enclosure 121.

In view of this, in the embodiment of the present application, the side of the chamber partition 1211 adjacent to the chamber partition is provided to be bonded to the chamber partition, so that there is no gap between the chamber partition 1211 and the chamber partition due to the bonding, and thus the arcs discharged from the chambers of different polarities do not pass through and contact between the chamber partition 1211 and the chamber partition.

In the present embodiment, specifically, the portion where the chamber partition plate 1211 is bonded to the chamber partition plate may be a surface of the chamber partition plate 1211 facing the chamber partition plate, or may be a surface of the chamber partition plate 1211 adjacent to a surface facing the chamber partition plate, which is not particularly limited in this application. Further, the fit includes a partial fit and a complete fit. For example, the surface of the chamber partition plate 1211 facing the chamber partition plate is bonded to the side surface portion of the chamber partition plate facing the chamber partition plate 1211; alternatively, the plate surface of the chamber partition plate 1211 adjacent to the surface facing the chamber partition plate is entirely bonded to the chamber partition plate.

Although the embodiment of the present application has the above-described design of the chamber partition 1211 and the chamber partition, a gap may exist between the chamber partition 1211 and the chamber partition during actual assembly. In this way, a very small portion of the arc exiting from the different pole chambers may pass through the gap. However, it is undeniable that most of the arc is still blocked by the space plate 1211, compared to the case where the space plate 1211 is not provided, so that the probability of arc contact of the different chambers is greatly reduced.

In some embodiments, referring to fig. 1 and 2, the side of the cover 121 facing the breaker body 11 is fitted with the side of the breaker body 11 facing the cover 121.

The side of the cover 121 facing the breaker body 11 is the same as the side of the cover 121 on the entrance side.

Because the concentration of conductive particles in the arc at the entrance side of the cover 121 is high, and the arc may also wrap around between the breaker body 11 and the side of the cover 121 and contact occurs. Therefore, it is necessary to design the positional relationship between the breaker body 11 and the cover 121 on the entry side of the cover 121.

Based on this, in the embodiment of the present application, the side surface of the cover body 121 facing the breaker body 11 and the side surface of the breaker body 11 facing the cover body 121 are set to be attached to each other, so that no gap is formed between the breaker body 11 and the cover body 121 due to attachment, and thus the electric arcs discharged from different pole chambers can not pass through and contact between the breaker body 11 and the cover body 121.

In this embodiment, specifically, the side of the cover 121 facing the breaker body 11 may be a ring-shaped plane. For example, when the inner cavity 1210 is provided in a rectangular parallelepiped shape, a side of the cover 121 facing the breaker body 11 may be a square annular plane.

In addition, after the side surface of the cover 121 facing the breaker body 11 is attached to the side surface of the breaker body 11 facing the cover 121, the projection of the side surface of the cover 121 facing the breaker body 11 may fall within the projection range of the side surface of the breaker body 11 facing the cover 121 in the arrangement direction of the breaker body 11 and the cover 121.

In some embodiments, referring to fig. 6, in the first direction Y, both ends of the cavity spacer 1211 are attached to the inner wall of the cover 121. The first direction Y is perpendicular to the arrangement direction of the breaker body 11 and the cover 121, and the first direction Y is perpendicular to the arrangement direction of the plurality of pole chambers.

After the arc enters the processing section of the housing 121, if there is a gap between the chamber spacing plate 1211 and the inner wall of the housing 121, the arcs discharged from the different pole chambers may pass through the gap to contact.

In view of this, in the embodiment of the present application, by providing both ends of the chamber partition plate 1211 to be fitted to the inner wall of the cover 121, no gap can be provided between the chamber partition plate 1211 and the inner wall of the cover 121 due to the fitting. In this way, the arcs discharged from the different pole chambers do not pass through and contact between the chamber separation plate 1211 and the cover 121.

In some embodiments, with continued reference to fig. 2, 3 and 6, the side of the compartment plate 1211 remote from the compartment plate extends to the end of the cover 121 remote from the breaker body 11.

When the arc approaches the discharge side of the housing 121, the arc may still contact the discharge side to short-circuit the multipole circuit, although there are relatively few conductive particles in the arc.

Based on this, in the present embodiment, by extending the side of the chamber partition plate 1211 away from the chamber partition plate to the end of the cover 121 away from the breaker body 11, it is possible to make the conductive particles in the arc more adsorbed or intercepted by the processing section, and further to make the concentration of the conductive particles in the arc located at the discharge side of the cover 121 further lower, so as to reduce the possibility of the arc conducting at the discharge side of the cover 121.

Further, when the concentration of the conductive particles in the arc at the discharge side of the cap 121 is further reduced, it is also possible to reduce or even avoid the influence of the arc on other components (e.g., rear wiring row, control circuit wiring, etc.) at the discharge side of the cap 121.

In some embodiments, the side of the chamber spacing plate 1211 remote from the chamber spacing plate extends beyond the end of the cover 121 remote from the breaker body 11 (not shown).

When the arc reaches the discharge side of the cap 121, if conductive particles remain in the arc, the conductive particles may also contact at the discharge side.

Based on this, in the present embodiment, by disposing the side of the chamber spacing plate 1211 away from the chamber spacing plate so as to protrude from the end of the cover 121 away from the breaker body 11, the arc can be moved a certain distance further outside the cover 121 away from the breaker body 11, and during the arc movement, the chamber spacing plate 1211 can still isolate the arc, so that the possibility of the arc contacting outside the cover 121 away from the breaker body 11 is further reduced.

Further, as in the previous embodiment, the present embodiment can also reduce or even avoid the influence of the arc on other components (e.g., the rear line bank, the control circuit wiring, etc.) on the discharge side of the hood 121.

In some embodiments, with continued reference to fig. 1, 2 and 3, the housing assembly 12 further includes an end cap 123, the end cap 123 being mounted to a side of the cover 121 remote from the circuit breaker body 11.

When the arc reaches a side of the cover 121 remote from the breaker body 11 (the discharge side of the cover 121), if the arc is not intercepted or blocked, the arc still moves outside the discharge side of the cover 121 to be in contact.

Based on this, in the present embodiment, by providing the end cap 123 on the discharge side of the cover 121, the end cap 123 can intercept the conductive particles carried in the arc on the side of the cover 121 away from the breaker body 11, so that the conductive particles in the arc discharged from the discharge side are further reduced, and further the arc discharged from the discharge side of the cover 121 is reduced or eliminated, so that the influence of the arc on other external components is reduced or eliminated.

In this embodiment, referring specifically to fig. 7, the end cap 123 may include an interception portion 1231 and a venting portion 1232. The interception part 1231 is used to intercept the conductive particles. The exhaust part 1232 may be a plurality of exhaust holes, which rapidly exhaust the gas carried in the arc to the outside of the cover 121, preventing the gas from being accumulated inside the cover 121.

The exhaust holes may be uniformly arranged on the end cover 123, or may be randomly arranged on the end cover 123, which is not particularly limited in this application. The vent holes may be provided as circular holes, bar-shaped holes, etc., which are not particularly limited in this application.

In addition, the mounting manner of the end cover 123 and the cover body 121 may include at least one of plugging, snap connection, pin connection or screw connection, which is not particularly limited in this application.

For example, referring to fig. 7, a surface of the end cover 123 facing the breaker body 11 may be provided with an annular rib 1233, and an outer surface of the rib 1233 may be closely attached to an inner wall of the sub-cavity in the cover 121, so as to achieve plugging of the end cover 123 with the cover 121.

Further, referring to fig. 3, a sixth hole K6 may be further formed in the end cover 123, a fifth hole K5 may be further formed in the cover 121 opposite to the sixth hole K6, and one end of a screw may pass through the sixth hole K6 and be fixed in the fifth hole K5 to fix the end cover 123 to the cover 121.

In some embodiments, end cap 123 is attached to cavity spacer plate 1211.

When a gap is provided between the end cover 123 and the chamber separation plate 1211, an arc located on the discharge side of the cover 121 may reach between the end cover 123 and the chamber separation plate 1211, and contact may occur.

In this embodiment, by providing the end cap 123 so as to be bonded to the end cap plate 1211, the end cap 123 and the end cap plate 1211 can be bonded to each other without a gap therebetween, and an arc reaching the discharge side of the cover 121 can be prevented from passing through and contacting between the end cap plate 1211 and the end cap 123.

In this embodiment, specifically, the interception portion 1231 of the end cover 123 may be attached to the chamber separation plate 1211. The specific bonding method between the blocking portion 1231 and the partition 1211 may be different depending on the arrangement of the partition 1211 on the discharge side of the cover 121.

Illustratively, in the case where the side of the compartment partition 1211 remote from the compartment partition extends to the end of the cover 121 remote from the breaker body 11, the interception portion 1231 may directly abut with the side of the compartment partition 1211 remote from the compartment partition. In the case where the side of the compartment partition 1211 remote from the compartment partition protrudes from the end of the cover 121 remote from the breaker body 11, the interception part 1231 may be provided between the side of the compartment partition 1211 close to the compartment partition and the side remote from the compartment partition, and the interception part 1231 may be provided with a catching groove facilitating the catching on the compartment partition 1211, and the groove wall of the catching groove may be attached to the compartment partition 1211.

Finally, it should be noted that, the housing assembly 12 provided in the embodiment of the present application not only can isolate the conductive particles carried in the arc, but also can process the high-temperature gas carried in the arc, so as to reduce the influence of the high-temperature gas on other devices or main circuits except the circuit breaker 1 caused by directly flushing out the circuit breaker body 11.

The processing of the high temperature gas by the housing assembly 12 may include heat exchange and buffering, among other things. Specifically, during heat exchange, in the process that the high-temperature gas contacts the cover body 121, the buffer plate 122 and the end cover 123, part of heat energy can be transferred to the cover body 121, the buffer plate 122 and the end cover 123, so that the cover body 121, the buffer plate 122 and the end cover 123 can emit the acquired heat energy. During buffering, the high-temperature gas can be blocked by the buffer plate 122 and the end cover 123 to form buffering in the process of contacting the buffer plate 122 and the end cover 123, so that the speed of flushing the high-temperature gas out of the shell assembly 12 is reduced.

The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A housing assembly mounted to the circuit breaker body; the breaker body is internally provided with a plurality of pole chambers, which is characterized in that,

the shell assembly comprises a cover body, the cover body is mounted on the breaker body, an inner cavity of the cover body is communicated with a plurality of pole chambers, a cavity spacing plate is arranged in the inner cavity and used for isolating different electric arcs exhausted from the pole chambers.

2. The housing assembly of claim 1 wherein a compartment spacer is disposed between adjacent ones of said pole compartments, one of said compartment spacer being opposite one of said compartment spacer.

3. The housing assembly of claim 2 wherein a side of the compartment divider adjacent the compartment divider is in registry with the compartment divider.

4. A housing assembly according to any one of claims 1 to 3, wherein the side of the cover facing the circuit breaker body is in abutment with the side of the circuit breaker body facing the cover.

5. The housing assembly of claim 2, wherein in a first direction, both ends of the cavity spacer plate are in abutment with an inner wall of the housing;

the first direction is perpendicular to the arrangement direction of the breaker body and the cover body, and the first direction is perpendicular to the arrangement direction of the plurality of pole chambers.

6. The housing assembly of claim 2, wherein a side of the compartment plate remote from the compartment plate extends to an end of the cover remote from the circuit breaker body.

7. The housing assembly of claim 2, wherein a side of the compartment plate remote from the compartment plate extends beyond an end of the cover remote from the circuit breaker body.

8. The housing assembly of claim 6 or 7, further comprising an end cap mounted to a side of the cover remote from the circuit breaker body.

9. The housing assembly of claim 8, wherein the end cap is in engagement with the cavity spacer plate.

10. A circuit breaker comprising a circuit breaker body and a housing assembly according to any one of claims 1 to 9, the housing assembly being mounted to the circuit breaker body.