CN217691005U

CN217691005U - Circuit breaker

Info

Publication number: CN217691005U
Application number: CN202221642664.4U
Authority: CN
Inventors: 刘磊; 郭友德
Original assignee: Xiamen Hongfa Electrical Safety and Controls Co Ltd
Current assignee: Xiamen Hongfa Electrical Safety and Controls Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-28
Anticipated expiration: 2032-06-29

Abstract

The utility model provides a circuit breaker, include: the circuit breaker comprises a circuit breaker main body, a plurality of groups of arc extinguish chamber modules and a plurality of groups of sealing pieces; the circuit breaker main body includes: the circuit breaker comprises a circuit breaker shell and a plurality of groups of contact mechanisms arranged in the circuit breaker shell, wherein the circuit breaker shell is provided with a plurality of arc extinguish chamber mounting openings side by side, and the edges oppositely arranged in two adjacent arc extinguish chamber mounting openings are adjacent edges; the arc extinguishing chamber modules are respectively assembled in the arc extinguishing chamber mounting openings in an inserting manner, each arc extinguishing chamber module comprises an arc extinguishing chamber shell matched with the arc extinguishing chamber mounting opening, and flanges corresponding to the adjacent edges are arranged on the arc extinguishing chamber shells; the multiunit sealing member sets up the explosion chamber module the flange with circuit breaker casing abut on between the limit for to adjacent two carry out sealed interval between the explosion chamber module. The electric arc is not easy to escape from the gap between the arc extinguish chamber module and the adjacent edge without passing through the arc extinguish chamber, thereby improving the safety.

Description

Circuit breaker

Technical Field

The utility model relates to a circuit breaker field, concretely relates to circuit breaker that security is good.

Background

The circuit breaker is an automatic switch with larger switching-on and breaking capacity; the circuit breaker generally comprises a circuit breaker shell, and a plurality of groups of contact mechanisms and arc extinguish chamber modules which are arranged in the circuit breaker shell and matched with each other; one contact mechanism is matched with one arc extinguish chamber module, and the arc extinguish chamber module is used for introducing electric arcs generated by opening and closing of the contact mechanism and carrying out arc extinction. A plurality of arc chute modules are typically inserted side-by-side within an arc chute mounting opening of a circuit breaker housing. In the prior art, a certain gap exists between the arc extinguish chamber module and the arc extinguish chamber mounting opening, so that electric arcs in one arc extinguish chamber module easily play out from the gap without passing through the arc extinguish chamber, an interphase short circuit is formed, and the safety is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a circuit breaker can effectively improve the security.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a circuit breaker, comprising:

a circuit breaker body comprising: the circuit breaker comprises a circuit breaker shell and a plurality of groups of contact mechanisms arranged in the circuit breaker shell, wherein the circuit breaker shell is provided with a plurality of arc extinguish chamber mounting openings side by side, and the edges oppositely arranged in the two adjacent arc extinguish chamber mounting openings are adjacent edges;

the arc extinguishing chamber modules are respectively inserted and assembled in the arc extinguishing chamber mounting openings, each arc extinguishing chamber module comprises an arc extinguishing chamber shell matched with the arc extinguishing chamber mounting opening, and flanges corresponding to the adjacent edges are arranged on the arc extinguishing chamber shells;

the multiple groups of sealing pieces are arranged between the flanges of the arc extinguish chamber modules and the adjacent edges of the circuit breaker shell and used for sealing the adjacent two arc extinguish chamber modules.

Further, the sealing element is a strip-shaped sealing strip.

Further, the sealing strip is fixed to the flange in advance.

Furthermore, the sealing strip is fixed on the flange in advance in a clamping and fixing mode.

Furthermore, a fixing gap is formed in the flange, the sealing strip comprises a strip-shaped body and a fixing part formed on the strip-shaped body, and the fixing part is clamped and fixed in the fixing gap; the flange is provided with an abutting surface opposite to the abutting edge, and the strip-shaped body is attached to the abutting surface so as to be in sealing fit between the flange and the abutting edge.

Further, the fixed part is "T" shape structure, including the horizontal portion of horizontal setting and the vertical portion of vertical setting, the middle part position of horizontal portion is connected to the one end of vertical portion, and the bar body is connected to the other end, vertical portion joint is in the fixed breach, horizontal portion protrusion is laminated in the upper surface that deviates from the butt face in the flange at the both ends of vertical portion.

Furthermore, the same sealing strip is provided with at least two fixing parts, the flange is provided with at least two fixing gaps, and the fixing gaps and the fixing parts are matched in a one-to-one correspondence mode.

Further, the explosion chamber shell is formed by the symmetrical left shell and the right shell in a splicing mode, and the left side edge of the left shell and/or the right side edge of the right shell are/is provided with the flange.

Furthermore, the left shell and the right shell are both provided with connecting through holes at the positions of the fixing notches, and the connecting through holes of the left shell and the connecting through holes of the right shell correspond to each other and are connected in a penetrating manner through the connecting shafts; the fixing part covers the outer side of the connecting shaft.

Further, the sealing strip is fixed on the adjacent edge of the arc extinguish chamber installation opening in advance.

Through the utility model provides a technical scheme has following beneficial effect:

abutting edges of the two adjacent arc extinguish chamber mounting openings are in abutting fit with the flanges through the sealing pieces, so that a fit gap between an arc extinguish chamber shell and the abutting edges is sealed, and the two adjacent arc extinguish chamber modules are sealed and spaced; the electric arc is not easy to jump out from the gap between the arc extinguish chamber module and the adjacent edge without passing through the arc extinguish chamber, the safety is greatly improved, the structure is simple, and the realization is easy.

Drawings

Fig. 1 is a partially exploded view of a circuit breaker according to an embodiment;

fig. 2 is a schematic diagram showing a partially exploded structure of a circuit breaker according to an embodiment;

FIG. 3 is a schematic perspective view of an arc extinguishing chamber equipped with a sealing strip in an embodiment;

figure 4 shows a side view of an arc chute fitted with a sealing strip in an embodiment;

FIG. 5 is an exploded view of the arc chute of the embodiment;

FIG. 6 is an enlarged schematic view of area A of FIG. 5;

fig. 7 is a schematic structural view of the sealing tape.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Example one

The embodiment provides a circuit breaker, including: the circuit breaker comprises a circuit breaker main body, a plurality of groups of arc extinguish chamber modules and a plurality of groups of sealing pieces; the circuit breaker main body includes: the circuit breaker comprises a circuit breaker shell and a plurality of groups of contact mechanisms (three groups in the specific embodiment and suitable for three-phase power control) arranged in the circuit breaker shell, wherein the circuit breaker shell is provided with a plurality of arc extinguish chamber mounting openings side by side, and specifically, the number of the arc extinguish chamber mounting openings is three; the edges oppositely arranged in the mounting openings of the two adjacent arc extinguishing chambers are adjacent edges.

The arc extinguish chamber modules are also provided with three groups, and the three groups of arc extinguish chamber modules are respectively inserted and assembled in the arc extinguish chamber mounting openings; so as to correspond to and cooperate with the three groups of contact mechanisms one by one. The three groups of contact mechanisms are used for respectively controlling the on/off of three-phase electricity; and the arc extinguishing chamber module is used for introducing electric arcs generated by opening and closing of the contact mechanism and extinguishing arcs. Of course, in other embodiments, the number of arc chute modules and contact mechanisms may be two, so as to be suitable for the control of the mains supply and the like.

The arc extinguishing chamber module comprises an arc extinguishing chamber shell matched with an arc extinguishing chamber mounting opening, and a flange corresponding to an adjacent edge is arranged on the arc extinguishing chamber shell.

The sealing member sets up the explosion chamber module the flange with the circuit breaker casing abut between the limit for to adjacent two carry out sealed interval between the explosion chamber module. Therefore, the electric arc is not easy to escape from the gap between the arc extinguish chamber module and the adjacent edge without passing through the arc extinguish chamber, the safety is greatly improved, the structure is simple, and the realization is easy.

Specifically, in this embodiment, the sealing member is an annular sealing ring; the sealing ring can seal not only the gap between the flange and the adjacent edge of the circuit breaker shell, but also realize sealing of a whole circle.

Example two

Referring to fig. 1 to 7, the present embodiment provides a circuit breaker including: a circuit breaker main body, a plurality of groups of arc extinguishing chamber modules 20 and a plurality of groups of sealing elements; the circuit breaker main body includes: a circuit breaker housing 10 and a plurality of sets of contact mechanisms (three sets in this embodiment, suitable for three-phase power control) disposed in the circuit breaker housing 10, wherein the circuit breaker housing 10 is provided with a plurality of arc-extinguishing chamber mounting openings 11 side by side, and specifically, the number of the arc-extinguishing chamber mounting openings 11 is also three; the oppositely arranged edges of the two adjacent arc extinguish chamber mounting openings 11 are adjacent edges.

Specifically, in the three arc extinguishing chamber mounting openings 11 arranged side by side in the present embodiment, the right side edge of the arc extinguishing chamber mounting opening 11 on the left side is arranged opposite to the left side edge of the arc extinguishing chamber mounting opening 11 in the middle, and the right side edge of the arc extinguishing chamber mounting opening 11 in the middle is arranged opposite to the left side edge of the arc extinguishing chamber mounting opening 11 on the right side; the abutting edges are thus the right side edge of the left arc chute mounting opening 11, the left and right side edges of the middle arc chute mounting opening 11, and the left side edge of the right arc chute mounting opening 11.

The arc extinguish chamber modules 20 are also provided with three groups, and the three groups of arc extinguish chamber modules 20 are respectively inserted and assembled in the arc extinguish chamber mounting openings 11; so as to correspond to and cooperate with the three groups of contact mechanisms one by one. The three groups of contact mechanisms are used for respectively controlling the on/off of three-phase electricity; the arc extinguishing chamber module 20 is used for introducing electric arcs generated by opening and closing of the contact mechanism and extinguishing arcs. Of course, in other embodiments, the number of arc chute modules 20 and contact mechanisms may be two, so as to be suitable for the control of the mains supply, etc.

The arc extinguishing chamber module 20 comprises an arc extinguishing chamber housing 21 matched with the arc extinguishing chamber mounting opening 11, and a flange 22 corresponding to the adjacent edge is arranged on the arc extinguishing chamber housing 21.

The sealing member is banding sealing strip 30, and sealing strip 30 sets up explosion chamber module 20 the flange 22 with circuit breaker housing 10 between the border 12 to sealed flange 22 and the gap between the border 12 make electric arc be difficult for not crossing the explosion chamber and scurring out from the explosion chamber module 20 and the gap between the border 12, also can be fine promptly to adjacent two carry out sealed interval between the explosion chamber module 20. The safety is greatly improved, the structure is simple, and the realization is easy.

Meanwhile, the strip-shaped sealing strip 30 has the following advantages compared with the annular sealing ring in the embodiment: once the appearance of the arc extinguishing chamber shell 21 is changed, the sealing ring needs to be changed correspondingly, the cost for changing the sealing ring is high, and if a mould needs to be redesigned; the strip-shaped sealing strip 30 is used, and can be used in common only by changing the area where the flange 22 is arranged, as long as the strip-shaped sealing strip is arranged at a corresponding position (for example, only between the flange 22 of the arc extinguish chamber module 20 and the adjacent edge 12 of the circuit breaker housing 10), so that the strip-shaped sealing strip has better universality.

Meanwhile, relative to the other sides of the arc extinguish chamber mounting opening 11, even if a sealing matching structure of a sealing piece is not provided, the matching gap between the arc extinguish chamber shell 21 and the arc extinguish chamber mounting opening 11 is small, and the distance is long, so that electric arcs can not enter the other arc extinguish chamber module 20 from the other sides which are far away from each other basically, and the use safety of the relay is ensured sufficiently.

Further, in this embodiment, the sealing strip 30 is fixed to the flange 22 in advance, so that the sealing strip 30 can be assembled on the arc extinguishing chamber housing 21 in advance for positioning, and during installation, the arc extinguishing chamber module 20 is only required to be aligned and inserted into the arc extinguishing chamber mounting opening 11, and the sealing strip 30 does not need to be positioned, so that the assembly is more convenient, and the matching position is more accurate.

Specifically, the sealing strip 30 is fixed to the flange 22 in advance by a snap-fit manner. More specifically, a fixing notch 221 is formed in the flange 22, the sealing strip 30 includes a strip-shaped body 31 and a fixing portion 32 formed on the strip-shaped body 31, the fixing portion 32 is fixed in the fixing notch 221 in a clamping manner, the flange 22 has an abutting surface (i.e., a lower surface) opposite to the adjacent edge 12, and the strip-shaped body 31 is attached to the abutting surface (i.e., the lower surface) of the flange 22 and further is in sealing fit between the flange 22 and the adjacent edge 12; in this manner, a secure fit of the sealing strip 30 with the flange 22 is achieved. With this arrangement, before assembly, the strip-shaped body 31 can be fixed in the fixing notch 221 by the fixing portion 32, and during assembly, the strip-shaped body 31 is smoothly fitted between the flange 22 and the abutting edge 12.

More specifically, the fixing and assembling manner of the fixing portion 32 and the fixing notch 221 is as follows: fixed part 32 is "T" shape structure, including the horizontal portion 321 of horizontal setting and the vertical portion 322 of vertical setting, the middle part position of horizontal portion 321 is connected to the one end of vertical portion 322, and bar body 31 is connected to the other end, vertical portion 322 joint is in fixed breach 221, horizontal portion 321 protrusion is laminated in flange 22 on the upper surface that deviates from the butt face in the both ends of vertical portion 322. So set up, the assembly is firm, is difficult for droing, and installs and removes the convenience. If the assembly is carried out, the vertical part 322 is directly aligned to the fixing notch 221 and pushed into the fixing notch for clamping; when the device is disassembled, the device can be separated only by pulling out the device. Of course, in other embodiments, the manner of fixing the sealing strip 30 to the flange 22 is not limited to this, and for example, bonding, insertion, etc. may also be used.

In this embodiment, the same sealing strip 30 has two fixing portions 32, the flange 22 has two fixing notches 221, and the fixing notches 221 and the fixing portions 32 are correspondingly matched one to one; the assembly is more firm. Of course, in other embodiments, three or more may be provided.

The arc extinguishing chamber housing 21 is formed by splicing a left housing 211 and a right housing 212 which are symmetrical, and the left side edge of the left housing 211 and the right side edge of the right housing 212 are provided with the flanges 22; to fit the two long sides (i.e. the two adjacent sides 12) of the rectangular arc chute mounting opening 11, respectively.

The left shell 211 and the right shell 212 are provided with four groups of corresponding connecting through holes 23, and the connecting device further comprises a connecting shaft 24, wherein the connecting shaft 24 penetrates through the corresponding connecting through holes 23 to fixedly splice the left shell 211 and the right shell 212. Specifically, two sets of the connecting through holes 23 are located at two fixing notches 221 of the flange 22, and the fixing notches 221 play a role in avoiding the positions of the connecting through holes 23 and a role in clamping and matching with the fixing portion 32. After the connecting shaft 24 is fixed, the sealing strip 30 can be used for covering, so that the space is fully utilized, and a certain sealing function is also provided.

Although the adjacent edges 12 of the arc extinguishing chamber mounting openings 11 on the left and right sides are only one, the left housing 211 and the right housing 212 of the arc extinguishing chamber housings 21 of the three groups of arc extinguishing chamber modules in the embodiment are provided with the flanges 22, and the flanges 22 are provided with sealing strips. In this way, both the left side of the arc chute mounting opening 11 on the left side and the right side of the arc chute mounting opening 11 on the right side, which do not belong to the abutting edge 12, can be sealed by the sealing strip. So set up, the unification of the explosion chamber module of being convenient for mainly, when the assembly promptly, the explosion chamber module can assemble at will in arbitrary one explosion chamber installing opening 11, need not distinguish. Of course, in other embodiments, the three groups of arc chute modules may have different structures, such as the arc chute housing 21 of the arc chute module on the left side, only the right housing 212 provided with the flange 22 and the sealing strip 30; in the arc chamber housing 21 of the arc chamber module on the right side, only the left housing 211 is provided with the flange 22, the weather strip 30, and the like.

The circuit breaker provided by the embodiment fixes the sealing strip 30 on the flange 22, so that the assembly is more convenient and the matching position is more accurate. Of course, in other embodiments, the sealing strip 30 may also be fixed to the adjacent edge 12 of the arc extinguish chamber mounting opening 11, and if preferred, the adjacent edge 12 is provided with a mounting groove, and then the sealing strip 30 is fixedly mounted in the mounting groove, so as to achieve the precise mounting of the sealing strip 30. Or the sealing strip 30 is not fixed on the flange 22, nor on the adjacent edge 12, and is an independent component, so that the sealing strip 30 needs to be positioned at the same time when the arc extinguish chamber module 20 is assembled, the operation is complicated, the offset is easy to occur, and the assembling effect is poor.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A circuit breaker, comprising:

2. The circuit breaker of claim 1, wherein: the sealing element is a strip-shaped sealing strip.

3. The circuit breaker of claim 2, wherein: the sealing strip is pre-fixed to the flange.

4. The circuit breaker of claim 3, wherein: the sealing strip is fixed on the flange in advance in a clamping and fixing mode.

5. The circuit breaker of claim 4, wherein: the sealing strip comprises a strip-shaped body and a fixing part formed on the strip-shaped body, and the fixing part is clamped and fixed in the fixing gap; the flange is provided with an abutting surface opposite to the abutting edge, and the strip-shaped body is attached to the abutting surface so as to be in sealing fit between the flange and the abutting edge.

6. The circuit breaker of claim 5, wherein: the fixed part is "T" shape structure, including the horizontal portion of horizontal setting and the vertical portion of vertical setting, the middle part position of horizontal portion is connected to the one end of vertical portion, and the bar body is connected to the other end, vertical portion joint is in the fixed breach, horizontal portion protrusion is laminated in the upper surface that deviates from the butt face in the both ends of vertical portion in the flange.

7. The circuit breaker according to claim 5 or 6, characterized in that: the same sealing strip is provided with at least two fixing parts, the flange is provided with at least two fixing gaps, and the fixing gaps and the fixing parts are matched in a one-to-one correspondence mode.

8. The circuit breaker according to claim 5 or 6, characterized in that: the arc extinguish chamber shell is formed by the symmetrical left shell and the right shell in a splicing mode, and the left side edge of the left shell and/or the right side edge of the right shell are provided with the flanges.

9. The circuit breaker of claim 8, wherein: the left shell and the right shell are both provided with connecting through holes at the positions of the fixing notches, and the connecting through holes of the left shell and the connecting through holes of the right shell correspond to each other and are connected in a penetrating manner through a connecting shaft; the sealing strip covers the outer side of the connecting shaft.

10. The circuit breaker of claim 2, wherein: the sealing strip is fixed on the adjacent edge of the arc extinguish chamber mounting opening in advance.