Pole-mounted circuit breaker with self-locking function

Abstract

The utility model discloses a pole-mounted circuit breaker with a self-locking function, and relates to the technical field of pole-mounted circuit breakers. The box comprises a box body, and further comprises a supporting part which is located on the lower portion and used for providing supporting; the two locking parts are installed on the supporting part, and the two locking parts are arranged in a mirror image mode; the three circuit breaking parts are mounted at the top of the supporting part and are arranged in a linear array; wherein the supporting part is used for providing support for the locking part and the circuit breaking part, and the locking part is used for locking the circuit breaking part when the whole circuit is broken by the circuit breaking part. According to the utility model, through the arrangement of the locking part, the problems that in the use process of an existing pole-mounted circuit breaker, when faults are eliminated and a power supply is recovered, automatic switching-on is possibly caused by misoperation of an operator or other reasons, a fault circuit which is not repaired is electrified again, secondary faults are caused, and further damage to equipment is caused are solved; and even personnel safety is endangered.

Description

Technical Field

[0001] This utility model belongs to the technical field of pole-mounted circuit breakers, and in particular relates to a pole-mounted circuit breaker with a self-locking function. Background Technology

[0002] As an important low-voltage electrical device, pole-mounted circuit breakers are widely used in power supply and distribution systems in many places such as industry, commerce and civil use. They can connect and disconnect load current under normal conditions, and automatically disconnect the circuit under fault conditions to protect the safe operation of electrical equipment and lines.

[0003] However, when existing pole-mounted circuit breakers are in use, they may automatically close due to operator error or other reasons after the fault is cleared and power is restored. This could cause the faulty circuit that has not yet been repaired to be powered on again, resulting in a secondary fault, further damage to the equipment, or even endangering personnel safety. Utility Model Content

[0004] The purpose of this utility model is to provide a pole-mounted circuit breaker with a self-locking function. By setting a locking part, it solves the problem that when the fault is cleared and the power is restored, the existing pole-mounted circuit breaker may automatically close due to operator error or other reasons, causing the faulty circuit that has not yet been repaired to be powered on again, resulting in secondary faults, further damage to the equipment, and even endangering personnel safety.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a pole-mounted circuit breaker with a self-locking function, comprising a housing, and further comprising: a support portion located at the bottom for providing support; two locking portions mounted on the support portion, arranged in a mirror image of each other; and three circuit-breaking portions mounted on the top of the support portion, arranged in a linear array. The support portion provides support for the locking and circuit-breaking portions, and the locking portion locks the circuit-breaking portion when the circuit-breaking portion breaks the entire circuit.

[0007] Furthermore, the support includes two L-shaped support legs fixedly connected to the bottom of the box, a crossbeam fixedly connected to the front side of the box, and several insulating components installed on the top of the box; wherein, the two L-shaped support legs are located on the left and right sides of the box respectively, and are arranged in a mirror image of each other, for supporting the box, and the locking part and the circuit breaker part are both installed on the crossbeam.

[0008] Furthermore, the locking part includes a connecting component mounted on the inner wall of the crossbeam; and an elastic component mounted on the front side of the connecting component, the front side of the elastic component being connected to the crossbeam; wherein, rotation of the connecting component stretches the elastic component, thereby locking the circuit breaker part.

[0009] Furthermore, the circuit breaker section includes a first circuit breaker assembly, which is mounted on the connecting assembly and its rear side is connected to an insulating component; and a second circuit breaker assembly, which is mounted on the top of the crossbeam and located in front of the first circuit breaker assembly. The first circuit breaker assembly is used for the connection between the connecting assembly and the second circuit breaker assembly. When the connecting assembly rotates, the first circuit breaker assembly moves accordingly, forming a circuit breaker through the second circuit breaker assembly.

[0010] Furthermore, the connecting assembly includes a shaft rotatably connected to the inner wall of the crossbeam, the right side of the shaft extending to the outside of the crossbeam, a disengaging handle fixedly connected to the right extension of the shaft, and a connecting rod fixedly connected to the outer wall of the shaft; wherein, the disengaging handle is used to apply external driving force to the shaft and transmit it to the elastic component through the connecting rod.

[0011] Furthermore, the elastic component includes a support rod hinged to the front side of the connecting rod, and a spring is fixedly connected to the front side of the support rod. The front side of the spring is fixedly connected to the crossbeam. When the connecting component rotates, the spring undergoes elastic deformation and generates elastic force, which acts on the circuit breaker under the connection of the connecting component, thereby locking the circuit breaker in its open state.

[0012] Furthermore, the circuit breaker assembly includes a connecting rod 2 fixedly connected to the outer wall of the shaft. An insulating pull rod is hinged to the front side of the connecting rod 2, and a connecting block is hinged to the top of the insulating pull rod. A connecting piece is provided on the top of the connecting block. The insulating pull rod is made of insulating material to avoid electrical conduction and ensure that the opening and closing handle is in an insulated state.

[0013] Furthermore, the second circuit breaker component includes an insulating support fixedly connected to the top of the crossbeam. An isolation blade is provided on the top of the insulating support, and a contact is provided on the top of the insulating support. The contact is adapted to the isolation blade. The isolation blade is mounted on the connector and cooperates with the contact to control the circuit breaking or opening of the entire circuit.

[0014] Furthermore, the insulating component includes an insulating sleeve fixedly connected to the top of the housing; wherein the insulating sleeve is hollow, and its inner wall contains a vacuum interrupter. The working principle of the vacuum interrupter is as follows: when the circuit breaker is tripped, the moving and stationary contacts quickly separate in a vacuum environment, the contact resistance increases sharply, the current contracts to the microscopic contact point, and high-temperature metal vapor is generated. The metal vapor ionizes to form a plasma arc. In a vacuum environment, the metal vapor is quickly absorbed and condensed by the shield, and the arc energy cannot be sustained. When the current crosses zero, the insulation strength of the vacuum medium recovers instantly, and the arc cannot reignite. It relies on the increase of the contact gap and the magnetic field to drive the arc to lengthen, forcing the current to decay to zero.

[0015] Furthermore, the connector includes an isolating blade fixedly connected to the top of the connecting block, the front side of the isolating blade being hinged to the isolating blade head, and an embedded current transformer being provided on the front side of the insulating sleeve, the front side of the embedded current transformer being hinged to the isolating blade; wherein, the isolating blade is used for the connection between the connecting block, the isolating blade head and the embedded current transformer, and for the opening and closing between the isolating blade head and the contacts.

[0016] This utility model has the following beneficial effects:

[0017] 1. By setting a locking part, when the shaft rotates, the connecting rod will also rotate around the shaft. At this time, the support rod will pull the spring. Under the restriction of the spring, when the front side of the connecting rod faces upward, the support rod will restrict the rotation of the shaft. This limiting force comes from the elastic force of the spring, which can effectively prevent the opening and closing handle from rotating accidentally, thereby avoiding the malfunction of components such as the isolating knife. This realizes the self-locking function of the circuit breaker, ensuring that the circuit breaker can reliably maintain the open circuit state after disconnecting the circuit, and improving the safety and stability of the circuit.

[0018] 2. By setting up a circuit breaker section, when electrical isolation is required, force can be applied to the open / close handle to rotate the shaft. At this time, the connecting rod two will also rotate around the shaft, thereby driving the isolating knife to rotate around the connection between the isolating knife and the embedded current transformer through the connecting block and the insulating pull rod. This causes the isolating knife head to disengage from the contact, completing the circuit breaker operation. This achieves clear electrical isolation, and the visible isolation status allows staff to clearly know that the circuit has been broken, avoiding misoperation, ensuring personnel safety, and improving the reliability of the pole-mounted circuit breaker. It can also lengthen and quickly extinguish the arc, reducing the arc's erosion of the contacts and other components, and improving the arc extinguishing performance and service life of the circuit breaker.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a bottom view of the structure of this utility model;

[0023] Figure 3 This is a partial structural diagram of the locking part of this utility model;

[0024] Figure 4 This is a partial structural diagram of the circuit breaker part of this utility model;

[0025] Figure 5 This utility model Figure 3 A magnified structural diagram of A in the middle.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Support section; 111. Housing; 112. L-shaped support foot; 113. Crossbeam; 114. Insulating sleeve; 2. Locking section; 21. Connecting assembly; 211. Shaft; 212. Opening / closing handle; 213. Connecting rod one; 22. Elastic assembly; 221. Support rod; 222. Spring; 3. Circuit breaker section; 31. Circuit breaker assembly one; 311. Connecting rod two; 312. Connecting block; 313. Insulating pull rod; 314. Isolating knife; 315. Inserted current transformer; 32. Circuit breaker assembly two; 321. Isolating knife head; 322. Insulating support column; 323. Contact. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-5As shown, this utility model is a pole-mounted circuit breaker with a self-locking function, including a housing 111, and further including: a support part 1, located at the bottom, for providing support; a locking part 2, mounted on the support part 1, two of which are arranged in a mirror image of each other; and a circuit breaking part 3, mounted on the top of the support part 1, three of which are arranged in a linear array; wherein, the support part 1 provides support for the locking part 2 and the circuit breaking part 3, and when the circuit breaking part 3 breaks the entire circuit, the locking part 2 locks the circuit breaking part 3, and the support part 1 covers... The enclosure includes two L-shaped support feet 112 fixedly connected to the bottom of the enclosure 111, a crossbeam 113 fixedly connected to the front side of the enclosure 111, and several insulating components installed on the top of the enclosure 111. The two L-shaped support feet 112 are located on the left and right sides of the enclosure 111 respectively and are mirror images of each other, used to support the enclosure 111. The locking part 2 and the circuit breaking part 3 are both installed on the crossbeam 113. The insulating components include an insulating sleeve 114 fixedly connected to the top of the enclosure 111. The insulating sleeve 114 is hollow and its inner wall contains a vacuum interrupter.

[0030] The locking part 2 includes a connecting assembly 21, which is mounted on the inner wall of the crossbeam 113; and an elastic assembly 22, which is mounted on the front side of the connecting assembly 21 and connected to the crossbeam 113. Rotation of the connecting assembly 21 stretches the elastic assembly 22, locking the circuit breaker 3. The connecting assembly 21 includes a shaft 211 rotatably connected to the inner wall of the crossbeam 113. The right side of the shaft 211 extends outside the crossbeam 113, and a disengaging handle 212 is fixedly connected to the right extension of the shaft 211. A connecting rod 213 is fixedly connected to the outer wall of the shaft 211. The disengaging handle 212 is used to apply external driving force to the shaft 211 and, through the connecting rod 212... 13 is transmitted to the elastic component 22, which includes a support rod 221 hinged to the front of the connecting rod 213. A spring 222 is fixedly connected to the front of the support rod 221, and the front of the spring 222 is fixedly connected to the crossbeam 113. When the connecting component 21 rotates, the spring 222 undergoes elastic deformation and generates elastic force. Under the connection of the connecting component 21, it acts on the circuit breaker 3, thereby locking the circuit breaker 3 in the open state. By setting the locking part 2, the accidental rotation of the opening and closing handle 212 can be effectively prevented, thereby avoiding the malfunction of components such as the isolating knife 314. The self-locking function of the circuit breaker is realized, ensuring that the circuit breaker can reliably maintain the open state after the circuit is disconnected, thus improving the safety and stability of the circuit.

[0031] The circuit breaker section 3 includes a first circuit breaker assembly 31, which is mounted on the connecting assembly 21 and connected to an insulating element at its rear; and a second circuit breaker assembly 32, which is mounted on the top of the crossbeam 113 and located in front of the first circuit breaker assembly 31. The first circuit breaker assembly 31 connects the connecting assembly 21 and the second circuit breaker assembly 32. When the connecting assembly 21 rotates, the first circuit breaker assembly 31 moves accordingly, forming a circuit breaker through the second circuit breaker assembly 32. The first circuit breaker assembly 31 includes components fixedly connected to the shaft. Connecting rod 211 on the outer wall of 211 has an insulating pull rod 313 hinged to its front side. A connecting block 312 is hinged to the top of the insulating pull rod 313, and a connecting piece is provided at the top of the connecting block 312. The insulating pull rod 313 is made of insulating material to prevent electrical conduction and ensure that the opening / closing handle 212 is in an insulated state. Circuit breaker assembly 22 includes an insulating support column 322 fixedly connected to the top of the crossbeam 113. An isolation blade 321 is provided at the top of the insulating support column 322. The top of the device is provided with a contact 323, which is adapted to an isolating blade head 321. The isolating blade head 321 is mounted on the connector and cooperates with the contact 323 to control the opening or closing of the entire circuit. The connector includes an isolating blade 314 fixedly connected to the top of the connecting block 312. The front side of the isolating blade 314 is hinged to the isolating blade head 321. An embedded current transformer 315 is provided on the front side of the insulating sleeve 114, and the front side of the embedded current transformer 315 is hinged to the isolating blade 314. 314 is used for the connection between the connecting block 312, the isolating blade 321 and the embedded current transformer 315, and for isolating the opening and closing of the isolating blade 321 and the contact 323. By setting the circuit breaker 3, obvious electrical isolation can be achieved. The visible isolation status allows the staff to clearly know that the circuit has been broken, avoiding misoperation, ensuring personnel safety, improving the reliability of the pole-mounted circuit breaker, and can also lengthen and quickly extinguish the arc, reducing the arc erosion of the contacts and other components, and improving the arc extinguishing performance and service life of the circuit breaker.

[0032] A specific application of this embodiment is as follows: When it is necessary to disconnect the circuit, force can be applied to the handle 212 to make it rotate the shaft 211. At this time, the connecting rod 311 will also rotate around the shaft 211. This will cause the isolating blade 314 to rotate around the connection between the isolating blade 314 and the embedded current transformer 315 through the connecting block 312 and the insulating pull rod 313, thereby causing the isolating blade head 321 to disengage from the contact 323 and complete the circuit disconnection. When the shaft 211 rotates, the connecting rod 213 will also rotate around the shaft 211. At this time, the support rod 221 will pull the spring 222. Under the restriction of the spring 222, when the front side of the connecting rod 213 faces upward, the support rod 221 will restrict the rotation of the shaft 211. This restricting force comes from the elastic force of the spring 222.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pole-mounted circuit breaker with self-locking function, comprising a housing, characterized in that, Also includes: A support portion, located below, is used to provide support; A locking part, wherein two locking parts are mounted on the support part and are arranged in a mirror image of each other; and The circuit breaker section is installed on the top of the support section, and three of them are arranged in a linear array. The support part is used to provide support for the locking part and the circuit breaking part. When the circuit breaking part breaks the entire circuit, the locking part is used to lock the circuit breaking part.

2. A pole-mounted circuit breaker with self-locking function according to claim 1, characterized in that, The support includes two L-shaped support legs fixedly connected to the bottom of the box, a crossbeam fixedly connected to the front side of the box, and several insulating components installed on the top of the box; The two L-shaped support feet are located on the left and right sides of the box body, respectively, and are mirror images of each other. They are used to support the box body. The locking part and the circuit breaker part are both installed on the crossbeam.

3. A pole-mounted circuit breaker with self-locking function according to claim 2, characterized in that, The locking part includes a connecting assembly, which is mounted on the inner wall of the crossbeam; and An elastic component is mounted on the front side of the connecting component, and the front side of the elastic component is connected to the crossbeam. The rotation of the connecting component stretches the elastic component, which then locks the circuit breaker in place.

4. A pole-mounted circuit breaker with self-locking function according to claim 3, characterized in that, The circuit breaker includes a circuit breaker assembly one, which is mounted on the connecting assembly, and the rear side of the circuit breaker assembly one is connected to an insulating member; and Circuit breaker component two is installed on the top of the crossbeam, located in front of circuit breaker component one. Among them, the circuit breaker component one is used to connect the connecting component and the circuit breaker component two. When the connecting component rotates, the circuit breaker component one will move accordingly, forming a circuit breaker through the circuit breaker component two.

5. A pole-mounted circuit breaker with self-locking function according to claim 4, characterized in that, The connecting assembly includes a shaft rotatably connected to the inner wall of the crossbeam, the right side of the shaft extending to the outside of the crossbeam, a disengaging handle fixedly connected to the right extension of the shaft, and a connecting rod fixedly connected to the outer wall of the shaft. The opening and closing handle is used to apply external driving force to the shaft and transmit it to the elastic component through the connecting rod.

6. A pole-mounted circuit breaker with self-locking function according to claim 5, characterized in that, The elastic component includes a support rod hinged to the front side of the connecting rod, a spring fixedly connected to the front side of the support rod, and the front side of the spring fixedly connected to the crossbeam. When the connecting component rotates, the spring undergoes elastic deformation and generates elastic force, which acts on the circuit breaker under the connection of the connecting component, thereby locking the circuit breaker in its open state.

7. A pole-mounted circuit breaker with self-locking function according to claim 6, characterized in that, The circuit breaker assembly includes a connecting rod 2 fixedly connected to the outer wall of the shaft. An insulating pull rod is hinged to the front side of the connecting rod 2. A connecting block is hinged to the top of the insulating pull rod. A connecting piece is provided on the top of the connecting block. The insulated pull rod is made of insulating material to prevent electrical conduction and ensure that the opening and closing handles are insulated.

8. A pole-mounted circuit breaker with self-locking function according to claim 7, characterized in that, The second circuit breaker component includes an insulating support fixedly connected to the top of the crossbeam. An isolation blade is provided on the top of the insulating support, and a contact is provided on the top of the insulating support. The contact is adapted to the isolation blade. The isolating blade is mounted on the connector and works in conjunction with the contact to control the opening or closing of the entire circuit.

9. A pole-mounted circuit breaker with self-locking function according to claim 8, characterized in that, The insulating component includes an insulating sleeve that is fixedly connected to the top of the housing; The insulating sleeve is hollow, and its inner wall contains a vacuum interrupter.

10. A pole-mounted circuit breaker with self-locking function according to claim 9, characterized in that, The connector includes an isolation blade fixedly connected to the top of the connector block. The front side of the isolation blade is hinged to the isolation blade head. An embedded current transformer is provided on the front side of the insulating sleeve. The front side of the embedded current transformer is hinged to the isolation blade. The isolating blade is used for the connection between the connecting block, the isolating blade head, and the embedded current transformer, and for the opening and closing of the isolating blade head and the contacts.

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