Circuit breaker with dustproof structure

Abstract

The utility model provides a circuit breaker with a dustproof structure, which comprises a circuit breaker main body, the opposite sides of the circuit breaker main body are respectively provided with an installation port, the positions of the two installation ports are respectively provided with an isolation device, and in an initial state, two isolation plates are pushed towards an adjacent direction through the elastic force of two first springs, so that the two isolation plates are separated from each other. According to the circuit breaker, the two isolation plates are arranged on the circuit breaker main body, so that the two isolation plates are in an attached state, and when the two isolation plates are in the attached state, a dustproof effect can be achieved at the position of the mounting port, and external dust, particles and the like are prevented from entering the circuit breaker main body; the two isolation plates move in opposite directions through extrusion of the external cable until the two isolation plates are in a separated state, and through elastic force of the two first springs and arrangement of the two isolation plates, an effect of fixing the external cable is achieved, and the situation of sliding of the external cable is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of dust prevention of circuit breakers, in particular to a circuit breaker with a dust prevention structure. Background Art

[0002] A circuit breaker is a switching device that can close, carry, and interrupt the current under normal circuit conditions, and close, carry, and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers are mainly used to protect circuits and equipment. When faults such as overload, short circuit, or undervoltage occur in the circuit, the circuit breaker can automatically cut off the power supply, thereby preventing equipment damage or fire accidents. According to the scope of use, circuit breakers can be divided into high-voltage circuit breakers and low-voltage circuit breakers. The boundary between high voltage and low voltage is relatively blurred, but generally, electrical appliances above 3 kV are called high-voltage electrical appliances. In the power distribution system, circuit breakers play an important role in distributing electric energy, starting asynchronous motors infrequently, and protecting power supply lines and motors, etc. There are various types of circuit breakers, including distribution-type circuit breakers, motor protection-type circuit breakers, and household and similar household protection-type circuit breakers. Distribution-type circuit breakers are divided into non-selective and selective types, and the selective type has more protection characteristics. Motor protection-type circuit breakers mainly focus on the protection of motors, while household and similar household protection-type circuit breakers belong to small-sized Class A circuit breakers for household circuit protection.

[0003] In existing household circuit breakers, generally, a circuit breaker body is included. An installation groove is usually provided at the bottom of the circuit breaker body, and a buckle is usually provided on one side of the installation groove. The buckle is usually made of plastic material and has a certain compressibility during use. A fixed frame is generally provided above the circuit breaker body. An installation port is provided on one side of the circuit breaker body, and the installation port is in communication with the fixed frame. Installation bolts are also provided inside the fixed frame. During use, the external cable will enter the inside of the circuit breaker body through the installation port, and the fixation effect on the external cable is achieved by rotating the installation bolts. However, at the position of the installation port on the existing circuit breaker body, it is usually directly exposed to the outside, and it is very easy to be invaded by pollutants such as dust and particulate matter in the external environment. These pollutants may enter the inside of the installation port, affecting the contact performance, and even causing faults such as poor contact or short circuit, thereby affecting the normal operation of the circuit breaker.

[0004] Therefore, it is necessary to provide a new circuit breaker with a dust prevention structure to solve the above technical problems. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a circuit breaker with a dust prevention structure.

[0006] The circuit breaker with a dust-proof structure provided by the present utility model includes a circuit breaker main body. Installation openings are provided on opposite sides of the circuit breaker main body, and isolation devices are provided at the positions of the two installation openings.

[0007] The isolation device includes two isolation plates and two first springs. An activity cavity is provided inside the circuit breaker main body. The two isolation plates are both movably arranged inside the activity cavity. The opposite sides of the two isolation plates are respectively fixedly connected to the adjacent ends of the two first springs. The ends of the two first springs far from the two partition plates are respectively fixedly connected to the opposite inner side walls of the activity cavity. Through grooves are provided on the adjacent sides of the two isolation plates. The two through grooves form a cylindrical shape, and the edges of the two isolation plates are both arc-shaped. A limiting component for fixing an external cable is also provided on the adjacent sides of the two isolation plates.

[0008] Preferably, the limiting component includes two limiting blocks. The cross-sections of the two limiting blocks are both semi-circular. The two limiting blocks can be spliced into a cylindrical shape, and the adjacent sides of the two limiting blocks are both arc-shaped. The two limiting blocks are respectively movably arranged inside the sliding cavities provided inside the two isolation plates. Elastic members are fixedly connected to the opposite sides of the two limiting blocks. The opposite ends of the two elastic members are respectively fixedly connected to the inner side walls of the two sliding cavities.

[0009] Preferably, fixing frames are provided on opposite sides of the circuit breaker. Installation bolts are provided inside the fixing frames. The bottom of the fixing frame communicates with the position of the installation opening. An activity block is provided on the fixing frame. The outer side wall of the activity block fits with the inner side wall of the fixing frame. One end of the activity block far from the fixing frame is fixedly connected to a pulling handle.

[0010] Preferably, a switch member is installed at the upper end of the circuit breaker main body.

[0011] Preferably, an installation groove is provided below the circuit breaker main body.

[0012] Preferably, a buckle is also movably provided below the circuit breaker main body.

[0013] Preferably, the elastic member is a second spring. One end of the second spring is fixedly connected to one side of the limiting block, and the end of the second spring far from the limiting block is fixedly connected to one inner wall of the sliding cavity.

[0014] Compared with the related art, the circuit breaker with a dust-proof structure provided by the present utility model has the following beneficial effects:

[0015] The device is provided with two partition plates. In the initial state, the opposite sides of the two partition plates are fixedly connected with first springs. The elastic forces of the two first springs push the two partition plates towards the adjacent direction, making the two partition plates fit together. When the two partition plates are in the fitting state, the dust-proof effect on the position of the installation opening can be achieved, preventing external dust, particles, etc. from entering the interior of the circuit breaker body. During use, the external wiring cable contacts the arc-shaped edges of the two partition plates. The extrusion of the external wiring cable causes the two partition plates to move in the opposite direction until the two partition plates are in a separated state. At this time, the external wiring cable completely enters the interior of the circuit breaker body. At this time, due to the elastic forces of the two first springs and the setting of the two partition plates, the external wiring cable is fixed to prevent it from sliding. Through grooves are arranged on the adjacent sides of the two partition plates, and the two through grooves form a cylindrical shape, making the two partition plates more adaptable to the shape of the external wiring cable. Description of the Drawings

[0016] Figure 1 Schematic diagram of the overall structure of the circuit breaker with a dust-proof structure provided by the present utility model;

[0017] Figure 2 Side view of the circuit breaker with a dust-proof structure provided by the present utility model;

[0018] Figure 3 Partial cross-sectional view of the circuit breaker with a dust-proof structure provided by the present utility model;

[0019] Figure 4 Schematic diagram of the isolation device provided by the present utility model;

[0020] Figure 5 Top view of the circuit breaker with a dust-proof structure provided by the present utility model;

[0021] Figure 6 Schematic diagram of the buckle provided by the present utility model.

[0022] Reference numerals in the figures: 1, circuit breaker body; 2, installation opening; 3, buckle; 4, switch member; 5, pulling handle; 6, movable block; 7, fixed frame; 8, installation groove; 9, partition plate; 10, limit block; 11, first spring; 12, second spring; 13, movable cavity; 14, sliding cavity; 15, installation bolt. Detailed Embodiment

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0024] Please refer to Figures 1-6 , wherein, Figure 1Schematic diagram of the overall structure of the circuit breaker with a dust-proof structure provided by the present utility model; Figure 2 Side view of the circuit breaker with a dust-proof structure provided by the present utility model; Figure 3 Partial cross-sectional view of the circuit breaker with a dust-proof structure provided by the present utility model; Figure 4 Schematic diagram of the isolation device provided by the present utility model; Figure 5 Top view of the circuit breaker with a dust-proof structure provided by the present utility model; Figure 6 Schematic diagram of the buckle provided by the present utility model.

[0025] In the specific implementation process, such as Figures 1-6 As shown, a circuit breaker with a dust-proof structure includes a circuit breaker main body 1. Installation ports 2 are provided on opposite sides of the circuit breaker main body 1, and isolation devices are provided at the positions of the two installation ports 2;

[0026] The isolation device includes two isolation plates 9 and two first springs 11. An activity cavity 13 is provided inside the circuit breaker main body 1. The two isolation plates 9 are both movably arranged inside the activity cavity 13. The opposite sides of the two isolation plates 9 are respectively fixedly connected to the adjacent ends of the two first springs 11. The ends of the two first springs 11 far from the two partition plates are respectively fixedly connected to the opposite inner side walls of the activity cavity 13. Through grooves are provided on the adjacent sides of the two isolation plates 9. The two through grooves form a cylindrical shape, and the edges of the two isolation plates 9 are both set to be arc-shaped. A limiting component for fixing the external cable is also provided on the adjacent sides of the two isolation plates 9;

[0027] The limiting component includes two limiting blocks 10. The cross-sections of the two limiting blocks 10 are both set to be semi-circular. The two limiting blocks 10 can be spliced into a cylindrical shape, and the adjacent sides of the two limiting blocks 10 are both set to be arc-shaped. The two limiting blocks 10 are respectively movably arranged inside the sliding cavities 14 provided inside the two isolation plates 9, that is, the two limiting blocks 10 can slide inside the sliding cavities 14. Elastic members are fixedly connected to the opposite sides of the two limiting blocks 10. The opposite ends of the two elastic members are respectively fixedly connected to the inner side walls of the two sliding cavities 14. The elastic member is a second spring 12. One end of the second spring 12 is fixedly connected to one side of the limiting block 10, and the end of the second spring 12 far from the limiting block 10 is fixedly connected to the inner side wall of the sliding cavity 14;

[0028] In the specific implementation process, the external cable will squeeze the two limiting blocks 10 to move towards the inside of the two isolation plates 9. At this time, the external cable can completely enter the inside of the circuit breaker main body 1;

[0029] Fixing frames 7 are provided on both opposite sides of the circuit breaker. Installation bolts 15 are provided inside the fixing frames 7. The bottom of the fixing frames 7 communicates with the position of the installation opening 2. A movable block 6 is provided on the fixing frames 7. The outer side wall of the movable block 6 fits against the inner side wall of the fixing frames 7. One end of the movable block 6 away from the fixing frames 7 is fixedly connected to a pulling handle 5.

[0030] A switch member 4 is installed at the upper end of the circuit breaker body 1. An installation groove 8 is provided below the circuit breaker body 1. A buckle 3 is also movably provided below the circuit breaker body 1;

[0031] In the specific implementation process, the buckle 3 is also called a circuit breaker lock. The circuit breaker buckle 3 generally adopts a snap-in installation and is applicable to most miniature circuit breakers and medium and small molded case circuit breakers;

[0032] Among them, the above-mentioned circuit breaker body 1 is an NXB-125 circuit breaker, which has the ability to automatically distinguish between slow-changing leakage and sudden leakage (electric shock) for protection, ensuring the safety of the circuit.

[0033] The working principle provided by the present utility model is as follows: During the use of the device, by providing two partition plates 9, in the initial state, the opposite sides of the two partition plates 9 are fixedly connected with first springs 11. Through the elastic force of the two first springs 11, the two partition plates 9 are pushed towards the adjacent direction, making the two partition plates 9 fit together. When the two partition plates 9 are in a fitting state, the dust-proof effect on the position of the installation opening 2 can be achieved, preventing external dust, particles, etc. from entering the interior of the circuit breaker body 1;

[0034] During the installation of the external wiring cable, by contacting the edge of the arc formed by the external wiring cable and the two partition plates 9, the two partition plates 9 move in opposite directions under the extrusion of the external wiring cable until the two partition plates 9 are in a separated state, resulting in a spacing between the two isolation blocks. During this process, the external wiring cable also squeezes the two limiting blocks 10 to move into the interior of the two partition plates 9. At this time, the external wiring cable can completely enter the interior of the circuit breaker body 1. At this time, through the elastic force of the two first springs 11 and the setting of the two partition plates 9, the fixing effect on the external wiring cable is achieved, preventing it from sliding.

[0035] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated here too much.

[0036] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A circuit breaker with a dustproof structure, characterized in that: It comprises a circuit breaker body (1), wherein opposite sides of the circuit breaker body (1) are provided with mounting openings (2), and isolation devices are provided at the positions of the two mounting openings (2); The isolation device comprises two isolation plates (9) and two first springs (11); a movable cavity (13) is arranged inside the circuit breaker body (1); the two isolation plates (9) are movably arranged inside the movable cavity (13); opposite sides of the two isolation plates (9) are respectively fixedly connected to adjacent ends of the two first springs (11); ends of the two first springs (11) away from the two isolation plates are respectively fixedly connected to opposite inner side walls of the movable cavity (13); adjacent sides of the two isolation plates (9) are respectively provided with through grooves, the two through grooves are cylindrical, and the edges of the two isolation plates (9) are both arranged in an arc shape; and adjacent sides of the two isolation plates (9) are also provided with limiter components for fixing external cables.

2. The circuit breaker with dustproof structure according to claim 1, characterized in that: The limit assembly comprises two limit blocks (10), the cross sections of the two limit blocks (10) are both arranged to be semicircular, the two limit blocks (10) can be spliced ​​into a cylindrical shape, and the adjacent sides of the two limit blocks (10) are both arranged to be arc-shaped, the two limit blocks (10) are respectively movably arranged inside the sliding cavities (14) arranged inside the two isolation plates (9), the opposite sides of the two limit blocks (10) are fixedly connected with elastic members, and the opposite ends of the two elastic members are respectively fixedly connected to the inner side walls of the two sliding cavities (14).

3. The circuit breaker with dustproof structure according to claim 2, characterized in that: A fixed frame (7) is provided on opposite sides of the circuit breaker, a mounting bolt (15) is provided inside the fixed frame (7), the bottom of the fixed frame (7) is connected to the position of the mounting opening (2), a movable block (6) is provided on the fixed frame (7), the outer wall of the movable block (6) is in contact with the inner wall of the fixed frame (7), and a pulling handle (5) is fixedly connected to one end of the movable block (6) away from the fixed frame (7).

4. The circuit breaker with dustproof structure according to claim 3, characterized in that: A switch component (4) is installed on the upper end of the circuit breaker body (1).

5. The circuit breaker with dustproof structure according to claim 4, characterized in that: A mounting groove (8) is provided below the circuit breaker body (1).

6. The circuit breaker with dustproof structure according to claim 5, characterized in that: A buckle (3) is also movably provided below the circuit breaker body (1).

7. The circuit breaker with dustproof structure according to claim 6, characterized in that: The elastic member is a second spring (12), one end of the second spring (12) is fixedly connected to one side of the limit block (10), and the end of the second spring (12) away from the limit block (10) is fixedly connected to an inner wall of the sliding cavity (14).

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