Circuit breaker with shielding screen
By introducing a shielding mechanism into the circuit breaker, the arc between the moving and stationary contacts is interrupted, solving the problem of insufficient breaking capacity of DC circuit breakers and extending the product's service life.
Patent Information
- Application Number
- CN202421185050.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
DC circuit breakers have deficiencies in breaking capacity and arc loss, resulting in a shortened product lifespan.
A circuit breaker with a screen is designed, comprising a screen mechanism including a track, a screen slider, and an elastomer. The arc is interrupted by the movement of the screen slider between the moving and stationary contacts, and the isolation state is maintained by the elasticity of the elastomer.
It improves the breaking capacity of the circuit breaker, reduces the wear of moving and stationary contacts, and extends the service life of the product.
Smart Images
Figure CN222355053U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with a partition. Background Art
[0002] At present, the DC circuit breakers on the market have poor breaking capacity due to the lack of zero crossing. It is difficult to improve the critical current test and low short circuit test of the product, and the arc during the test will cause rapid loss of the moving and static contacts, which is not conducive to extending the service life of the product. In view of the above defects, this application is proposed. Utility Model Content
[0003] The utility model aims to provide a circuit breaker with a partition screen, which can isolate the arc between the moving and static contacts after the product is disconnected, thereby improving the short-circuit capacity of the product and reducing the damage of the arc to the moving and static contacts.
[0004] In order to solve the above problems, the utility model provides a circuit breaker with a screen, including a screen mechanism arranged in an arc running channel, the screen mechanism including a track, a screen slider and an elastomer, the screen slider is installed in the track, the screen slider is connected to the elastomer, when the circuit is opened, the screen slider is located between the moving contact and the static contact, when the circuit is closed, the moving contact squeezes the screen slider to make it withdraw from the position between the moving contact and the static contact, and the circuit can be closed at this time.
[0005] According to an embodiment of the utility model, the end of the partition slider is provided with an arc surface portion.
[0006] According to an embodiment of the utility model, the width of the arc surface of the screen slider is greater than the width of the other positions of the screen slider.
[0007] According to an embodiment of the present utility model, the width of the arc surface portion is greater than or equal to the width of the moving contact.
[0008] According to an embodiment of the present utility model, the circuit breaker with a partition further includes a limiting structure, and the limiting structure is used to limit the position of the partition slider.
[0009] According to an embodiment of the present utility model, the limiting structure includes a limiting block installed on the housing.
[0010] According to an embodiment of the present utility model, the limiting structure is arranged in the track.
[0011] According to an embodiment of the present invention, the elastic body is a spring.
[0012] According to an embodiment of the utility model, a column for installing a spring is provided in the track.
[0013] According to an embodiment of the utility model, the track is arranged on the arc isolation wall.
[0014] The beneficial effect of the utility model is that the moving contact and the static contact are separated by the screen mechanism. When the product is closed, the moving contact squeezes the screen slider, and the screen slider compresses the spring to move downward. At this time, the product can be closed, and the top of the screen slider abuts against the moving contact. When the product is opened, the moving and static contacts are separated, and the screen slider is blocked between the moving and static contacts under the action of the spring force, which plays a role in isolating the arc and reducing the loss of the moving and static contacts during the test. It is beneficial to electrical life tests, low short-circuit tests, critical current tests, high-breaking short-circuit tests, etc., and is also beneficial to extending the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0016] Figure 1 It is a schematic diagram of the overall structure of a circuit breaker with a partition;
[0017] Figure 2 It is a structural schematic diagram of the partition mechanism. DETAILED DESCRIPTION
[0018] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.
[0019] A circuit breaker having a partition, such as Figure 1 , Figure 2 The circuit breaker includes a screen mechanism 1 arranged in the arc running channel, and also includes traditional circuit breaker structures such as an operating mechanism, a contact structure, a wiring structure, and a tripping structure. The above structure is consistent with the traditional circuit breaker and is not repeated here. The screen mechanism 1 includes a track 11, a screen slider 14 and an elastic body 13. The screen slider 14 is installed in the track 11. The screen slider 14 is connected to the elastic body 13. When the circuit is opened, the screen slider 14 is located between the moving contact 2 and the static contact. When the circuit is closed, the moving contact 2 squeezes the screen slider 14 to make it withdraw from the position between the moving contact 2 and the static contact. At this time, the circuit can be closed.
[0020] Specifically, the screen mechanism 1 is arranged between the front and rear arc isolation walls 4. In the present embodiment, the track 11 is connected to one of the arc isolation walls 4. The track 11 and the arc isolation wall 4 can be integrally formed or connected by welding or the like. The screen slider 14 moves along the track 11. Preferably, the track 11 is a T-shaped slide groove, the screen slider 14 is partly a T-shaped slider, the elastomer 13 is a spring, and a column 12 for spring installation is provided in the track 11. In order to make the screen slider 14 move more smoothly when contacting with the moving contact 2, a circular arc surface 15 is provided at the end of the screen slider 14 so that it can move downward smoothly after being pressed. In other embodiments, it can also be provided as an inclined surface.
[0021] Furthermore, a limiting structure is included, which is used to limit the maximum moving position of the partition slider 14. The limiting structure can be set in the track 11 or above the partition slider 14. In this embodiment, the limiting structure includes a limiting block 3 installed on the shell, and the limiting block 3 is set above the partition slider 14.
[0022] Optionally, in order to ensure the arc breaking effect, the width of the arc surface 15 is ≥ the width of the moving contact 2. Furthermore, the width of the arc surface 15 of the screen slider 14 is greater than the width of the rest of the screen slider 14, so as to save material costs and reduce the impact on the arc running channel.
[0023] The moving and static contacts are separated by a screen mechanism. When the product is closed, the moving contact 2 squeezes the screen slider 14, and the screen slider 14 compresses the spring to move downward. At this time, the product can be closed, and the top of the screen slider 14 abuts against the moving contact 2. When the product is opened, the moving and static contacts are separated, and the screen slider 14 is blocked between the moving and static contacts under the action of the spring force, which plays a role in isolating the arc and reducing the loss of the moving and static contacts during the test, which is beneficial to electrical life tests, low short-circuit tests, critical current tests, high-breaking short-circuit tests, etc., and is also beneficial to extending the service life of the product.
[0024] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.
Claims
1. A circuit breaker with a screen, characterized in that: The invention comprises a screen mechanism (1) arranged in an arc running channel, the screen mechanism (1) comprising a track (11), a screen slider (14) and an elastic body (13), the screen slider (14) being installed in the track (11), the screen slider (14) being connected to the elastic body (13), and when the switch is opened, the screen slider (14) is located between a moving contact (2) and a stationary contact, and when the switch is closed, the moving contact (2) presses the screen slider (14) to make it withdraw from the position between the moving contact (2) and the stationary contact, and the switch can be closed at this time.
2. The circuit breaker with a partition according to claim 1, characterized in that: The end of the partition slider (14) is provided with an arc surface (15).
3. The circuit breaker with a partition according to claim 2, characterized in that: The width of the arc surface (15) of the screen slider (14) is greater than the width of the other positions of the screen slider (14).
4. The circuit breaker with a screen according to claim 3, characterized in that: The width of the arc surface (15) is greater than or equal to the width of the moving contact (2).
5. The circuit breaker with a screen according to any one of claims 1 to 4, characterized in that: The circuit breaker with the partition further comprises a limiting structure, wherein the limiting structure is used to limit the position of the partition slider (14).
6. The circuit breaker with a screen according to claim 5, characterized in that: The limiting structure comprises a limiting block (3) installed on the housing.
7. The circuit breaker with a screen according to claim 5, characterized in that: The limiting structure is arranged in the track (11).
8. The circuit breaker with a partition according to claim 5, characterized in that: The elastic body (13) is a spring.
9. The circuit breaker with a partition according to claim 8, characterized in that: A column (12) for installing a spring is arranged in the track (11).
10. The circuit breaker with a screen according to claim 1, characterized in that: The track (11) is arranged on the arc isolation wall (4).