CN211376574U - Circuit breaker moving contact mounting structure - Google Patents
Circuit breaker moving contact mounting structure Download PDFInfo
- Publication number
- CN211376574U CN211376574U CN201921673676.1U CN201921673676U CN211376574U CN 211376574 U CN211376574 U CN 211376574U CN 201921673676 U CN201921673676 U CN 201921673676U CN 211376574 U CN211376574 U CN 211376574U
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- moving contact
- arc
- square hole
- circuit breaker
- contact
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Abstract
The utility model provides a circuit breaker moving contact mounting structure, includes moving contact (1) and casing (2), its characterized in that: one side wall of arc extinguishing chamber (201) is equipped with square hole (201a) with moving contact (1) motion path matches, square hole (201a) divide into closing a floodgate side and separating brake side, the peripheral side of square hole (201a) is provided with arc wall (201b), the belly of moving contact (1) is equipped with arc arch (103), arc arch (103) with arc wall (201b) meet and form seal structure, arc arch (103) are followed when moving contact (1) rotates be in closing a floodgate side and separating brake side of square hole (201a) between carry out the closing cap to square hole (201 a). The moving contact is additionally provided with an arc-shaped characteristic matched with a rotating path at the belly, so that the back is effectively sealed in the repulsion (opening) process of the contact, and the breaking performance of the circuit breaker is improved.
Description
Technical Field
The utility model belongs to the technical field of the circuit breaker, specifically say so and relate to a circuit breaker moving contact mounting structure.
Background
The circuit breaker is an important part in a distribution electrical appliance, is mainly used for an industrial low-voltage power system, and is used for connecting and disconnecting current in a power grid circuit and protecting lines and power supply equipment from damage caused by faults of overload, undervoltage, short circuit, single-phase grounding and the like. The function of the circuit breaker to break overload or short-circuit current is mainly accomplished by an arc extinguishing chamber installed in the circuit breaker. When fault current occurs in a circuit and the current value exceeds the set protection range of the circuit breaker, the tripping mechanism acts to rapidly disconnect the moving contact and the fixed contact of the circuit breaker, the voltage between the moving contact and the fixed contact causes air medium discharge to generate high-temperature electric arc, the electric arc can burn the contact to influence the connection effect of the contact, so that the electric arc is transferred from the contact as fast as possible and is rapidly extinguished, the contact burning can be effectively reduced, and the purpose of prolonging the service life of the circuit breaker is achieved. The existing circuit breaker arc extinguishing system introduces electric arcs between grid pieces through arc extinguishing grid pieces, cuts the electric arcs into short arcs connected in series, and quickly improves the electric arc voltage, so that the effect of extinguishing the electric arcs is achieved. The contact structure of circuit breaker is one of the important parts that influence circuit breaker breaking performance, and the moving contact majority of present miniature circuit breaker all is open structure, and when the moving contact was opened, the rear end can not form effectual seal structure, is unfavorable for the realization of circuit breaker breaking performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at exactly being to above-mentioned current moving contact rear end can not form effective seal structure when the moving contact is opened, the technical defect that the unable perfect realization of circuit breaker breaking performance, provide a circuit breaker moving contact mounting structure, the moving contact increase one at the belly with rotate the arc characteristic that the route matches, realize effectively sealing behind one when the contact is in the repulsion (open) in-process, improved the breaking performance of circuit breaker.
Technical scheme
In order to realize the technical purpose, the utility model provides a pair of circuit breaker moving contact mounting structure, including moving contact and casing, the moving contact includes articulated portion and contact site, the moving contact through articulated portion with the casing is connected and can is rotated, the inside arc extinguishing cavity that is equipped with of casing, the contact site of moving contact stretches into in the arc extinguishing cavity, its characterized in that: one side wall of the arc extinguishing chamber is provided with a square hole matched with the moving path of the moving contact, the square hole is divided into a closing side and an opening side, the peripheral side of the square hole is provided with an arc-shaped wall, the belly of the moving contact is provided with an arc-shaped bulge, the arc-shaped bulge is connected with the arc-shaped wall to form a sealing structure, and the arc-shaped bulge covers the square hole between the closing side and the opening side of the square hole when the moving contact rotates.
Furthermore, the abdomen of the moving contact is fixedly connected with an arc-shaped plastic part.
Advantageous effects
The utility model provides a pair of circuit breaker moving contact mounting structure, moving contact increase one at the belly and rotate the arc characteristic that the route matches, realize effectively sealing behind one's back when the contact at the repulsion (open) in-process, improved the breaking performance of circuit breaker.
Drawings
FIG. 1 is a structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of an arc extinguishing chamber in a housing according to embodiment 1 of the present invention;
fig. 3 is a sectional view taken along line U-U in fig. 2.
Fig. 4 is a schematic view of the position of the arc-shaped wall in embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a movable contact in embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a movable contact in embodiment 2 of the present invention;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
As shown in the attached figures 1 to 5, a moving contact mounting structure of a circuit breaker comprises a moving contact 1 and a shell 2, the movable contact 1 comprises a hinge part 101 and a contact part 102, the movable contact 1 is connected with the shell 2 through the hinge part 101 and can rotate, an arc extinguishing chamber 201 is arranged in the shell 2, the contact part 102 of the moving contact 1 extends into the arc extinguishing chamber 201, wherein, a square hole 201a matched with the moving path of the moving contact 1 is arranged on one side wall of the arc extinguishing chamber 201, the square hole 201a is divided into a closing side and an opening side, an arc-shaped wall 201b is arranged at the periphery side of the square hole 201a, the abdomen of the moving contact 1 is provided with an arc-shaped bulge 103, the arc-shaped bulge 103 is connected with the arc-shaped wall 201b to form a sealing structure, when the arc-shaped protrusion 103 rotates along with the moving contact 1, the square hole 201a is covered between the closing side and the opening side of the square hole 201 a.
In a closing state, the moving contact 1 is in contact with the static contact 3, and the moving contact 1 is positioned at the closing side of the square hole 201 a; when the moving contact 1 is opened, the moving contact 1 moves from the closing side to the opening side of the square hole 201a, and the arc-shaped protrusion 103 is matched with the square hole 201 a. By utilizing the arc-shaped protrusion 103, a sealing structure can be formed between the arc-extinguishing chamber 201 of the shell 2 and the hinge part 101 of the moving contact 1 when the moving contact 1 is in an opening state, and high-pressure gas in the arc-extinguishing chamber 201 is effectively prevented from entering one side of the hinge part 101 of the moving contact 1.
Example 2
As shown in fig. 6, an arc-shaped plastic part 103a is fixedly connected to the abdomen of the moving contact 1. The other structure is the same as embodiment 1.
The utility model provides a pair of circuit breaker moving contact mounting structure, moving contact increase one at the belly and rotate the arc characteristic that the route matches, realize effectively sealing behind one's back when the contact at the repulsion (open) in-process, improved the breaking performance of circuit breaker.
The structure, ratio, size and the like shown in the drawings attached to the present embodiment are only used for matching with the disclosure of the specification, so as to be known and read by those skilled in the art, and are not used to limit the practical limit condition of the present invention, so that the present invention does not have the essential meaning in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered to be the scope of the present invention without substantial changes in the technical content.
Claims (2)
1. The utility model provides a circuit breaker moving contact mounting structure, includes moving contact (1) and casing (2), moving contact (1) is including articulated portion (101) and contact site (102), moving contact (1) through articulated portion (101) with casing (2) are connected and can be rotated, casing (2) inside is equipped with arc extinguishing chamber (201), contact site (102) of moving contact (1) stretch into in arc extinguishing chamber (201), its characterized in that: one side wall of arc extinguishing chamber (201) is equipped with square hole (201a) with moving contact (1) motion path matches, square hole (201a) divide into closing a floodgate side and separating brake side, the peripheral side of square hole (201a) is provided with arc wall (201b), the belly of moving contact (1) is equipped with arc arch (103), arc arch (103) with arc wall (201b) meet and form seal structure, arc arch (103) are followed when moving contact (1) rotates be in closing a floodgate side and separating brake side of square hole (201a) between carry out the closing cap to square hole (201 a).
2. The moving contact mounting structure of a circuit breaker of claim 1, wherein: the abdomen of the moving contact (1) is fixedly connected with an arc plastic piece (103 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921673676.1U CN211376574U (en) | 2019-09-29 | 2019-09-29 | Circuit breaker moving contact mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921673676.1U CN211376574U (en) | 2019-09-29 | 2019-09-29 | Circuit breaker moving contact mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211376574U true CN211376574U (en) | 2020-08-28 |
Family
ID=72154298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921673676.1U Active CN211376574U (en) | 2019-09-29 | 2019-09-29 | Circuit breaker moving contact mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211376574U (en) |
-
2019
- 2019-09-29 CN CN201921673676.1U patent/CN211376574U/en active Active
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| GR01 | Patent grant |