CN205319113U - Circuit breaker separate arc wall mounting structure - Google Patents

Abstract

An arc partition installation structure of a circuit breaker, comprising a circuit breaker housing composed of a cover plate and a case, the upper arc partition wall and the lower arc partition wall are symmetrically installed on the inside of the cover plate and the case respectively, and the cover plate and the case After the casing is assembled and connected, there is formed between the inner side of the upper arc wall and the lower arc wall, which is connected to the upper arc wall and the lower arc wall at the same time and presses the upper arc wall and the lower arc wall to the cover plate respectively. And the pressing mechanism of the cover, through the pressing of the pressing mechanism, the upper and lower arc partitions can be more compactly matched with the cover and the cover, and the upper partition can be avoided when the circuit breaker vibrates, collides, etc. The arc wall and the lower arc partition wall are loose or fall, providing stable arc extinguishing performance for the circuit breaker.

Description

Arc barrier wall installation structure of circuit breaker

technical field

The utility model relates to the field of low-voltage electrical appliances, in particular to an arc-breaking wall installation structure of a circuit breaker.

Background technique

Arc extinguishing is a key link when the circuit breaker breaks the short-circuit current. The arc barrier is a device to protect the circuit breaker shell from being burned by the arc. The protective function of the arc barrier is very important, so the arc barrier must be reliably and firmly assembled On the circuit breaker shell, ensure the arc extinguishing performance of the circuit breaker. The common arc partition is divided into two pieces, the upper arc partition and the lower arc partition, which are respectively assembled on the cover plate and the case of the circuit breaker shell. After the cover plate is installed on the case, the arc partition will be damaged due to vibration, collision, etc. Dropping, resulting in the decline of the arc extinguishing performance of the circuit breaker, or even functional failure.

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art and provide a circuit breaker with simple structure, reliable assembly and stable arc extinguishing performance.

In order to achieve the above object, the utility model adopts the following technical solutions:

An arc barrier installation structure of a circuit breaker, comprising a circuit breaker housing composed of a cover plate 1 and a case 2, the upper arc barrier wall 3 and the lower arc barrier wall 4 are symmetrically installed on the cover plate 1 and the case 2 respectively After the cover plate 1 and the casing 2 are assembled and connected, a gap is formed between the inner side of the upper arc wall 3 and the lower arc wall 4 and simultaneously connects the upper arc wall 3 and the lower arc wall 4 and connects the upper arc wall. The wall 3 and the lower arc-breaking wall 4 are respectively pressed against the pressing mechanism 5 of the cover plate 1 and the casing 2, and the upper arc-breaking wall 3 and the lower arc-breaking wall 4 can be pressed more firmly and stably by the pressing mechanism 5 It is fixed on the cover plate 1 and the case 2.

Preferably, the pressing mechanism 5 includes two bosses respectively arranged on the corresponding positions of the upper arc wall 3 and the lower arc wall 4. After the cover plate 1 and the casing 2 are assembled and connected, the upper arc wall 3 The bosses on the lower arc-breaking wall 4 are contacted and connected to press the upper arc-breaking wall 3 and the lower arc-breaking wall 4 to the cover plate 1 and the casing 2 respectively.

Preferably, the pressing mechanism 5 can also adopt a boss arranged on the inner side of the upper arc-breaking wall 3 or the inner side of the lower arc-breaking wall 4. After the cover plate 1 and the casing 2 are assembled and connected, the other end of the boss It is crimped on the corresponding lower arc partition wall 4 or upper arc partition wall 3 .

Preferably, the pressing mechanism 5 is arranged at the first apex close to the arc entrance on the side of the lower arc partition wall 4 and/or the upper arc partition wall 3 close to the arc extinguishing chamber.

Preferably, on the side of the upper arc partition wall 3 and the lower arc partition wall 4 , there is a rib 6 bent and extending toward the center of the arc partition wall at the second vertex near the arc entrance on the side of the terminal block.

Preferably, the upper arc-breaking wall 3 and the lower arc-breaking wall 4 are respectively provided with circular mounting holes 8 which are interference-fitted with the bosses 13 on the cover plate 1 and the casing 2 .

Preferably, the upper arc partition wall 3 and the lower arc partition wall 4 are two symmetrical quadrilateral structures, and the second apex of the quadrilateral structure near the side of the terminal block and close to the arc entrance is provided with a fixed A circular notch 9 matching the column 11; a corner notch 10 matching the fixing block 12 on the housing is provided at the third apex near the bottom of the housing on the side.

Preferably, a compression mechanism 5 is provided on the first apex of the quadrilateral structure close to the arc inlet on the side of the arc extinguishing chamber, and a convex rib 6 that bends and extends toward the center of the arc partition wall is provided at the second apex; compression Between the mechanism 5 and the protruding ribs 6 are respectively provided circular mounting holes 8 which are interference fit with the protruding posts 13 on the casing.

Preferably, the pressing mechanism 5 is a triangular prism-shaped boss.

Preferably, a square through hole 7 for assembly is respectively provided between the side of the quadrilateral structure close to the wire seat and the rib 6 .

In the installation structure of the circuit breaker of the utility model, a pressing mechanism is provided on the upper arc wall and/or the lower arc wall, and after the cover plate and the casing are assembled and connected, the upper arc wall and the lower arc wall are respectively Compressed on the cover plate and the casing, the arc partition can be stably and firmly installed on the casing, providing stable arc extinguishing performance.

Description of drawings

Fig. 1 is the structural representation of the utility model cover plate;

Fig. 2 is the structural representation of the utility model casing;

Fig. 3 is a structural schematic diagram of the upper arc partition wall of the utility model;

Fig. 4 is a structural schematic diagram of the lower arc partition of the utility model;

Fig. 5 is a schematic structural view of the utility model when it works.

detailed description

The specific implementation of the installation structure of the arc partition wall of the circuit breaker of the present invention will be further described below in conjunction with the embodiments given in the accompanying drawings 1 to 5 . The installation structure of the arc partition wall of the circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in Figure 1 and Figure 2, the housing of the utility model circuit breaker includes a cover plate 1 and a casing 2, and the upper arc-breaking wall 3 and the lower arc-breaking wall 4 are two symmetrical quadrilateral structures, which are symmetrically installed on the Inside the cover plate 1 and the case 2, on both sides of the upper arc-breaking wall 3 and the lower arc-breaking wall 4 are installation grooves for installing the terminal block and the arc-extinguishing chamber respectively. After the cover plate 1 and the casing 2 are assembled and connected, a gap is formed between the inner side of the upper arc wall 3 and the lower arc wall 4 and simultaneously connects the upper arc wall 3 and the lower arc wall 4 and connects the upper arc wall 3 and the lower arc wall 4. The lower arc-breaking wall 4 is respectively pressed against the pressing mechanism 5 of the cover plate 1 and the case 2. Through the pressing of the pressing mechanism 5, the upper arc-breaking wall 3 and the lower arc-breaking wall 4 can be connected with the cover plate 1 and the cover. The shell 2 is more compactly matched to prevent the upper arc partition wall and the lower arc partition wall from loosening or falling when the circuit breaker vibrates, collides, etc., and provides stable arc extinguishing performance for the circuit breaker.

As shown in Figures 3 and 4, the pressing mechanism 5 includes two bosses symmetrically arranged on the corresponding positions inside the upper arc barrier 3 and the lower arc barrier 4 respectively, and the cover plate 1 and the casing 2 are assembled After the connection, the bosses on the upper arc shielding wall 3 contact and connect with the bosses on the lower arc shielding wall 4 to press the upper arc shielding wall 3 and the lower arc shielding wall 4 against the cover plate 1 and the casing 2 respectively. As another embodiment of the present utility model, the pressing mechanism 5 can also be a boss arranged on the inner side of the upper arc-break wall 3 or the lower arc-break wall 4 , assembled on the cover plate 1 and the casing 2 After the connection, the other end of the boss is crimped on the inner side of the corresponding lower arc-breaking wall 4 or upper arc-breaking wall 3, and the lower arc-breaking wall 4 or upper arc-breaking wall 3 can be pressed together with the The casing 2 or the cover plate 1 are more tightly and firmly matched.

As shown in Figure 3 and Figure 4, the upper arc barrier 3 and the lower arc barrier 4 are two symmetrical quadrilateral structures, and the inner side of the upper arc barrier 3 and the lower arc barrier 4 is close to the arc extinguishing chamber The first vertex near the arc inlet is respectively provided with a three-sided column-shaped boss as a pressing mechanism 5 on the side. The shape of the Mitsubishi column makes the side of the boss can be arranged along the sides of the upper arc barrier wall 3 and the lower arc barrier wall 4 corners, which will not affect the existing arc barrier function. Of course, as other embodiments of this new type of use, so The pressing mechanism 5 can also adopt other known boss shapes, such as cuboid, cylinder and so on. On the inner sides of the upper arc-break wall 3 and the lower arc-break wall 4, which are close to the side of the terminal block, there are two convex ribs 6 that bend and extend toward the center of the arc-break wall respectively symmetrically at the second apex near the arc entrance, through which the ribs 6 The setting can increase the creepage distance of the circuit breaker, thereby improving the electrical life of the circuit breaker. Between the convex ribs 6 and the first apex on the upper arc barrier wall 3 and the lower arc barrier wall 4 are respectively symmetrically provided circular mounting holes 8 which are interference fit with the convex posts 13 on the casing. At the same time, the upper arc wall 3 and the lower arc wall 4 are also symmetrically provided with a circular notch 9 that matches the upper fixing column 11 of the housing at the second apex, and the upper arc wall 3 and the lower arc wall 4 are close to the wiring On the side of the seat, near the third apex of the bottom of the housing, there is an angled notch 10 matching with the fixing block 12 on the housing. A square through hole 7 for assembling is also provided between the side of the respective terminal block and the raised rib 6 on the upper arc barrier and the lower arc barrier.

As shown in Fig. 1, Fig. 2 and Fig. 5, after aligning the circular notch 9 and the corner notch 10 on the arc partition wall with the fixed column 11 and the fixed block 12 on the housing respectively, the cover plate 1 and the cover The protrusions 13 on the shell 2 are inserted into the installation holes 8 of the upper arc barrier 3 and the lower arc barrier 4 respectively for interference fit, so that the arc barriers are installed on the housing. Then the cover plate 1 is installed on the top of the casing 2. After the cover plate 1 and the casing 2 are assembled and connected, the bosses of the two Mitsubishi columns on the inner side of the arc barrier are connected and pressed together, and the interaction force of the Mitsubishi columns makes the The arc partition is more firmly and stably installed on the housing where it is located.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (10)

1. the arc separating wall of an isolating switch installs structure, comprise cover plate (1) and the housing of isolating switch that case (2) is formed, upper arc separating wall (3) and lower arc separating wall (4) are installed on cover plate (1) and the inner side of case (2) respectively symmetrically, it is characterized in that: after cover plate (1) and case (2) assembly connection, the compression mechanism (5) being connected simultaneously and upper arc separating wall (3) and lower arc separating wall (4) being pressed in respectively cover plate (1) and case (2) with upper arc separating wall (3) and lower arc separating wall (4) it is formed with between upper arc separating wall (3) and lower arc separating wall (4) inner side.

2. the arc separating wall of isolating switch installs structure according to claim 1, it is characterized in that: described compression mechanism (5) comprises two and is arranged at arc separating wall (3) and the boss of lower arc separating wall (4) opposite position respectively, after cover plate (1) and case (2) assembly connection, the boss on upper arc separating wall (3) contacts with the boss on lower arc separating wall (4) to connect and upper arc separating wall (3) and lower arc separating wall (4) is pressed in cover plate (1) and case (2) respectively.

3. the arc separating wall of isolating switch installs structure according to claim 1, it is characterized in that: described compression mechanism (5) comprises the boss being arranged on arc separating wall (3) inner side or lower arc separating wall (4) inner side, after cover plate (1) and case (2) assembly connection, the described boss the other end is crimped on corresponding lower arc separating wall (4) or upper arc separating wall (3).

4. the arc separating wall of isolating switch installs structure according to claim 1, it is characterised in that: described compression mechanism (5) is arranged at the first apex of lower arc separating wall (4) and/or upper arc separating wall (3) inner side close electric arc entrance on the side of arc suppressing transformer.

5. according to the arc separating wall installation structure of described isolating switch arbitrary in Claims 1-4, it is characterised in that: the 2nd apex of described upper arc separating wall (3) and the upper close electric arc entrance on the side of junction block of lower arc separating wall (4) is provided with the convex tendon (6) extended to arc separating wall center curvature.

6. according to the arc separating wall of described isolating switch arbitrary in Claims 1-4, structure is installed, it is characterised in that: the open holes (8) being respectively equipped with the circle with convex post (13) shrink-fit on cover plate (1) and case (2) on described upper arc separating wall (3) and lower arc separating wall (4).

7. the arc separating wall of isolating switch installs structure according to claim 1, it is characterized in that: described upper arc separating wall (3) and lower arc separating wall (4) are the quadrilateral structure of two symmetrical shape, quadrilateral structure is provided with near the 2nd summit of electric arc entrance and the circular recess (9) fixed post (11) on housing and match on the side of junction block; Near the knuckle recess (10) that the 3rd apex is provided with the fixed block (12) on housing matches of housing bottom on this side.

8. the arc separating wall of isolating switch installs structure according to claim 7, it is characterized in that: described quadrilateral structure is provided with near the first summit of electric arc entrance on the side of arc suppressing transformer and compresses mechanism (5), and the 2nd apex is provided with the convex tendon (6) extended to arc separating wall center curvature; Compress the open holes (8) being respectively equipped with the circle with convex post (13) shrink-fit on housing between mechanism (5) and convex tendon (6).

9. the arc separating wall of isolating switch installs structure according to claim 8, it is characterised in that: the boss that described compression mechanism (5) is triangular prism shape.

10. the arc separating wall of isolating switch installs structure according to claim 8, it is characterised in that: described quadrilateral structure near the side of junction block and convex tendon (6) and between be respectively equipped with the through hole (7) of a square assembling.