Anti-disassembly plug-in circuit breaker

Abstract

The utility model provides an anti-disassembly plug-in type circuit breaker, which relates to the technical field of circuit breakers and comprises a circuit breaker main body and two fixing blocks arranged below the circuit breaker main body, the opposite sides of the two fixing blocks are provided with limiting devices, and the two fixing blocks are also provided with a plurality of mounting through holes. Fixing devices are arranged in the multiple mounting through holes, limiting blocks and elastic pieces are arranged, the positions of the limiting blocks can be extruded through the fixing devices, and therefore the limiting blocks can move towards mounting cavities formed in the fixing blocks till the limiting blocks completely enter the mounting cavities; when the fixing device completely passes through the position of the limiting block, the limiting block pops up due to the elastic force of the elastic piece, the position of the fixing device is covered through the limiting block, the device can adjust the position of the fixing device, the risk of mistaken touch or accidental touch of personnel is reduced, and the safety of the whole device is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an anti-disassembly plug-in circuit breaker. Background Art

[0002] A circuit breaker is an electrical device used to protect circuits and equipment. Its main function is to automatically cut off the power supply when an overload or short circuit occurs in the circuit, thereby avoiding damage to the circuit or equipment or the risk of an electrical fire. A circuit breaker is usually composed of a contact system, an arc extinguishing system, an operating mechanism, a trip unit, a housing, etc. These components work together to achieve their protection function. According to the scope of use, circuit breakers can be divided into high-voltage circuit breakers and low-voltage circuit breakers. Generally, circuit breakers above 3kV are called high-voltage electrical appliances. In the power distribution system, circuit breakers are widely used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When a power line or motor has a serious overload, short circuit, undervoltage or other faults, the circuit breaker can automatically cut off the circuit. Its function is equivalent to a combination of a fuse switch and an over-underheating relay. Among the existing circuit breakers, there is also a plug-in circuit breaker. The plug-in circuit breaker is a circuit breaker installation method, which is characterized by the circuit breaker being directly inserted into a pre-installed base or rail.

[0003] In the existing plug-in circuit breaker, it generally includes a circuit breaker body, and two fixing blocks are arranged under the circuit breaker body. The spacing between the two fixing blocks allows it to be installed on a pre-installed guide rail, and the two fixing blocks are also provided with mounting holes, and bolts are arranged in the mounting holes, so that the circuit breaker body can be further fixed. However, in the existing process of installing the circuit breaker, since the bolts are directly exposed to the outside, the unshielded bolts may be directly exposed to the external environment, which increases the risk of accidental contact or accidental contact by personnel, which may cause electric shock accidents or short circuits, posing a threat to personal safety.

[0004] Therefore, it is necessary to provide a new anti-disassembly plug-in circuit breaker to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a disassembly-proof plug-in circuit breaker.

[0006] The anti-disassembly plug-in circuit breaker provided by the utility model comprises a circuit breaker body and two fixing blocks arranged below the circuit breaker body, the opposite sides of the two fixing blocks are provided with limiting devices, the two fixing blocks are also provided with a plurality of mounting through holes, and the interiors of the plurality of mounting through holes are provided with fixing devices;

[0007] The limit device includes a limit block, an elastic member and a pulling assembly. A sliding cavity is arranged inside the fixed block, and the sliding cavity is connected to the mounting through hole. One end of the limit block is movably arranged in the sliding cavity. The limit block is arranged in an arc shape relative to one end of the sliding cavity. The upper end of the limit block is fixedly connected to the bottom end of the pulling assembly, the end of the limit block close to the sliding cavity is fixedly connected to one end of the elastic member, and the end of the elastic member away from the limit block is fixedly connected to the inner wall of the sliding cavity.

[0008] Preferably, the pulling assembly includes a pulling block and a fixed plate, the upper end of the fixed block is provided with a movable groove, the movable groove is communicated with the sliding cavity, the pulling block is movably arranged in the movable groove, the bottom end of the pulling block is fixedly connected to the upper end of the limit block, the end of the pulling block away from the limit block is fixedly connected to the bottom end of the fixed plate, and the pulling block and the fixed block form a T shape.

[0009] Preferably, the fixing device comprises a bolt and a nut, the nut is fixedly mounted on the upper end of the bolt, and one end of the bolt away from the nut movably extends to the inside of the mounting through hole.

[0010] Preferably, an external interface is provided on one side of the circuit breaker body.

[0011] Preferably, a switch component is installed at the upper end of the circuit breaker body, and a control component is also provided at the upper end of the circuit breaker.

[0012] Preferably, a plurality of heat dissipation holes are provided at the bottom end of the circuit breaker body.

[0013] Preferably, the elastic member is a spring, one end of the spring is fixedly connected to one side of the limiting block, and one end of the spring away from the limiting block is fixedly connected to the inner wall of the mounting cavity provided inside the fixing block.

[0014] Compared with the related art, the anti-disassembly plug-in circuit breaker provided by the utility model has the following beneficial effects:

[0015] The device is provided with a limit block and an elastic member. During the use of the device, when the fixing device is placed at the position of the mounting through hole, the fixing device will first contact the side of the limit block that is set in an arc shape, and the position of the limit block will be squeezed by the fixing device, so that the limit block will move toward the mounting cavity set inside the fixing block until the limit block completely enters the inside of the mounting cavity. When the fixing device completely passes the position of the limit block, the limit block will pop out due to the elastic force of the elastic member, and the position of the fixing device will be covered by the limit block. The device can realize the position of the fixing device, reduce the risk of accidental touch or accidental contact by personnel, and make the overall device safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the overall structure of the anti-disassembly plug-in circuit breaker provided by the utility model;

[0017] Figure 2 for Figure 1 The enlarged view of point A is shown;

[0018] Figure 3 A schematic diagram of the partial structure of the anti-disassembly plug-in circuit breaker provided by the utility model;

[0019] Figure 4 This is a cross-sectional view of the fixing block provided by the utility model.

[0020] Numbers in the figure: 1. Circuit breaker body; 2. Fixing block; 3. Bolt; 4. External interface; 5. Nut; 6. Sliding cavity; 7. Mounting through hole; 8. Fixing plate; 9. Movable groove; 10. Pulling block; 11. Heat dissipation hole; 12. Spring; 13. Limiting block; 14. Switch component; 15. Control component. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 4 ,in, Figure 1 This is a schematic diagram of the overall structure of the anti-disassembly plug-in circuit breaker provided by the utility model; Figure 2 for Figure 1 The enlarged view of point A is shown; Figure 3 A schematic diagram of the partial structure of the anti-disassembly plug-in circuit breaker provided by the utility model; Figure 4 This is a cross-sectional view of the fixing block provided by the utility model.

[0023] In the specific implementation process, Figure 1-Figure 4 As shown, a disassembly-proof plug-in circuit breaker comprises a circuit breaker body 1 and two fixing blocks 2 arranged below the circuit breaker body, the opposite sides of the two fixing blocks 2 are provided with limiting devices, the two fixing blocks 2 are also provided with a plurality of mounting through holes 7, and the interiors of the plurality of mounting through holes 7 are provided with fixing devices;

[0024] The limiting device includes a limiting block 13, an elastic member and a pulling assembly. A sliding cavity 6 is provided inside the fixed block 2. The sliding cavity 6 is communicated with the mounting through hole 7. One end of the limiting block 13 is movably provided in the sliding cavity 6. The limiting block 13 is provided in an arc shape relative to one end of the sliding cavity 6. The upper end of the limiting block 13 is fixedly connected to the bottom end of the pulling assembly. The end of the limiting block 13 close to the sliding cavity 6 is fixedly connected to one end of the elastic member. The end of the elastic member away from the limiting block 13 is fixedly connected to the inner side wall of the sliding cavity 6. The elastic member is a spring 12. One end of the spring 12 is fixedly connected to one side of the limiting block 13. The end of the spring 12 away from the limiting block 13 is fixedly connected to the inner side wall of the mounting cavity provided inside the fixed block 2.

[0025] The pulling assembly includes a pulling block 10 and a fixed plate 8. The upper end of the fixed block 2 is provided with a movable groove 9, which is communicated with the sliding cavity 6. The pulling block 10 is movably arranged in the movable groove 9. The bottom end of the pulling block 10 is fixedly connected to the upper end of the limit block 13. One end of the pulling block 10 away from the limit block 13 is fixedly connected to the bottom end of the fixed plate 8. The pulling block 10 and the fixed block 2 form a T shape.

[0026] In the specific use process, when the bolt 3 and the nut 5 need to be removed, the pull block 10 and the fixing plate 8 can be pulled to pull the limit block 13 away from the top of the nut 5, and then the bolt 3 and the nut 5 can be removed;

[0027] The fixing device includes a bolt 3 and a nut 5. The nut 5 is fixedly mounted on the upper end of the bolt 3. One end of the bolt 3 away from the nut 5 movably extends into the inside of the mounting through hole 7. The bolt 3 and the nut 5 are used in combination to fix the circuit breaker body 1.

[0028] An external interface 4 is provided on one side of the circuit breaker body 1, a switch component 14 is installed on the upper end of the circuit breaker body 1, a control component 15 is also provided on the upper end of the circuit breaker, and a plurality of heat dissipation holes 11 are provided on the bottom end of the circuit breaker body 1;

[0029] In the specific use process, the external interface 4 is used to connect an external cable, and the multiple heat dissipation holes 11 are provided to dissipate the heat generated by the circuit breaker body 1;

[0030] The circuit breaker body 1 mentioned above is a MDB8DC-63 series plastic case circuit breaker, which has a rated current of 63A and is suitable for a variety of electrical equipment and circuits to ensure the safety of the circuits.

[0031] The working principle provided by the utility model is as follows: during use, the device can be installed on the slide rail between two fixing blocks 2, and then the circuit breaker body 1 can be further fixed by bolts 3 and nuts 5;

[0032] By setting the limit block 13 and the spring 12, during the use of the device, when the bolt 3 and the nut 5 are placed at the position of the mounting through hole 7, the bottom of the bolt 3 will first contact the side of the limit block 13 set in a circular arc shape, and the position of the limit block 13 will be squeezed by the bolt 3, so that the limit block 13 will move toward the mounting cavity set inside the fixing block 2 until the limit block 13 completely enters the interior of the mounting cavity. When the fixing device completely passes the position of the limit block 13, the limit block 13 will pop out due to the elastic force of the spring 12, and the position of the fixing device will be covered by the limit block 13, thereby reducing the risk of people accidentally touching or accidentally contacting the bolt 3 and the nut 5, making the overall device safer.

[0033] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0034] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A disassembly-proof plug-in circuit breaker, characterized in that: The invention comprises a circuit breaker body (1) and two fixing blocks (2) arranged below the circuit breaker body, the two fixing blocks (2) having opposite sides provided with limiting devices, the two fixing blocks (2) also having a plurality of mounting through holes (7), and the interiors of the plurality of mounting through holes (7) being provided with fixing devices; The limiting device comprises a limiting block (13), an elastic member and a pulling assembly. A sliding cavity (6) is arranged inside the fixed block (2). The sliding cavity (6) is communicated with the mounting through hole (7). One end of the limiting block (13) is movably arranged in the sliding cavity (6). The limiting block (13) is arranged in an arc shape relative to one end of the sliding cavity (6). The upper end of the limiting block (13) is fixedly connected to the bottom end of the pulling assembly. The end of the limiting block (13) close to the sliding cavity (6) is fixedly connected to one end of the elastic member. The end of the elastic member away from the limiting block (13) is fixedly connected to the inner wall of the sliding cavity (6).

2. The anti-disassembly plug-in circuit breaker according to claim 1, characterized in that: The pulling assembly comprises a pulling block (10) and a fixed plate (8); a movable groove (9) is provided at the upper end of the fixed block (2); the movable groove (9) is communicated with the sliding cavity (6); the pulling block (10) is movably arranged in the movable groove (9); the bottom end of the pulling block (10) is fixedly connected to the upper end of the limit block (13); one end of the pulling block (10) away from the limit block (13) is fixedly connected to the bottom end of the fixed plate (8); the pulling block (10) and the fixed block (2) form a T shape.

3. The anti-disassembly plug-in circuit breaker according to claim 2, characterized in that: The fixing device comprises a bolt (3) and a nut (5), wherein the nut (5) is fixedly mounted on the upper end of the bolt (3), and an end of the bolt (3) away from the nut (5) movably extends to the inside of the mounting through hole (7).

4. The anti-disassembly plug-in circuit breaker according to claim 3, characterized in that: An external interface (4) is provided on one side of the circuit breaker body (1).

5. The tamper-proof plug-in circuit breaker according to claim 4, characterized in that: A switch component (14) is installed at the upper end of the circuit breaker body (1), and a control component (15) is also arranged at the upper end of the circuit breaker.

6. The tamper-proof plug-in circuit breaker according to claim 5, characterized in that: A plurality of heat dissipation holes (11) are provided at the bottom end of the circuit breaker body (1).

7. The tamper-proof plug-in circuit breaker according to claim 6, characterized in that: The elastic member is a spring (12), one end of the spring (12) is fixedly connected to one side of the limit block (13), and the end of the spring (12) away from the limit block (13) is fixedly connected to the inner wall of the installation cavity provided inside the fixed block (2).

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