A circuit breaker insulation device with an isolating switch

Abstract

The present invention discloses a circuit breaker insulation device with an isolating switch, comprising an insulating box for a circuit breaker, wherein a vacuum interrupter, an isolating conductive rod, and a fixed busbar are provided in the insulating box for a circuit breaker; a first fixed cavity extends out from the side of the insulating box for a circuit breaker, and the first fixed cavity penetrates the insulating box for a circuit breaker; an outlet terminal is provided on the side of the insulating box for a circuit breaker extending out from the first fixed cavity, and a first contact is fixed on the outlet terminal; the fixed busbar is fixed to the inner side surface of the insulating box for a circuit breaker on the side where the first fixed cavity is provided, one end of the fixed busbar is fixedly connected to the static contact end of the vacuum interrupter, and the other end of the fixed busbar is provided for the isolating conductive rod to extend into the first fixed cavity; the isolating conductive rod reciprocates along the first fixed cavity, and contacts or separates with the first contact. The present invention can significantly reduce the volume of a circuit breaker with an isolating switch, thereby improving the integrity of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker insulation device with an isolating switch. Background Art

[0002] Currently, the external insulation media for 12kV vacuum circuit breakers are primarily SF6 gas and solid epoxy resin, with some air insulation also being used. However, solid epoxy resin supports and fixings are still required. Solid epoxy resin insulation can be divided into either sealed or assembled processes. Regardless of the process, for outdoor pole-mounted vacuum circuit breakers, the circuit breaker's insulation system rarely incorporates an integrated disconnect switch. For common-chamber vacuum circuit breakers, if a disconnect switch is required, it must be installed externally and connected in series with the circuit breaker. This not only compromises the integrity of the common-chamber circuit breaker but also significantly increases the size of the disconnect switch. For pillar-mounted circuit breakers, when a disconnect switch is configured, it is directly connected to the pillar terminals of each phase, similarly increasing the size of the disconnect switch and hindering miniaturization. Whether for outdoor common-chamber or pillar-mounted vacuum circuit breakers, the disconnect switch is invariably external. This external disconnect switch is not only bulky and compromises the integrity of the circuit breaker, but is also susceptible to adverse outdoor conditions, reducing disconnect switch reliability and increasing maintenance workload. Summary of the Invention

[0003] The object of the present invention is to provide a circuit breaker insulation device with an isolating switch, which is used to solve at least one of the above technical problems. It can significantly reduce the volume of the circuit breaker with the isolating switch, thereby improving the integrity of the circuit breaker.

[0004] The embodiment of the present invention is achieved as follows:

[0005] A circuit breaker insulation device with an isolating switch comprises a circuit breaker insulation box, wherein a vacuum interrupter, an isolating conductive rod and a fixed busbar are arranged in the circuit breaker insulation box.

[0006] A first fixing cavity extends out from a side surface of the circuit breaker insulation box, and the first fixing cavity penetrates the circuit breaker insulation box.

[0007] An outlet terminal is provided on one side of the circuit breaker insulation box extending out of the first fixing cavity, and a first contact is fixed on the outlet terminal.

[0008] The fixed busbar is fixed to the inner side surface of the circuit breaker insulation box on the side where the first fixed cavity is provided, one end of the fixed busbar is fixedly connected to the static contact end of the vacuum interrupter, and the other end is for the isolation conductive rod to extend into the first fixed cavity.

[0009] The isolation conductive rod reciprocates along the first fixed cavity and contacts or separates from the first contact.

[0010] In a preferred embodiment of the present invention, the first contact of the circuit breaker insulation device with disconnector is a plum blossom contact.

[0011] In a preferred embodiment of the present invention, an isolation transmission member is further provided in the circuit breaker insulation box of the circuit breaker insulation device with an isolating switch.

[0012] In a preferred embodiment of the present invention, the circuit breaker insulation device with disconnector further includes a second contact.

[0013] The first fixing cavity includes a small inner diameter portion and a large inner diameter portion.

[0014] The second contact extends into the large inner diameter.

[0015] The isolating conductive rod passes through the second contact and the small inner diameter in sequence and reciprocates.

[0016] In a preferred embodiment of the present invention, the second contact of the circuit breaker insulation device with disconnector is a plum blossom contact.

[0017] In a preferred embodiment of the present invention, a support, a connecting rod, and a transmission member are further provided in the circuit breaker insulation box of the circuit breaker insulation device with disconnector.

[0018] The support is fixedly connected to the circuit breaker insulation box.

[0019] The transmission member is rotatably connected to the support.

[0020] The input end of the transmission member is connected to the upper transmission device, and the output end is connected to the connecting rod through a pin, and drives the connecting rod to reciprocate.

[0021] The connecting rod is connected to the moving contact of the vacuum interrupter, and the connecting rod drives the moving contact of the vacuum interrupter to close or open.

[0022] In a preferred embodiment of the present invention, a conductive rod and a flexible connection are further provided in the circuit breaker insulation box of the circuit breaker insulation device with disconnector.

[0023] The flexible connection adopts a U-shaped structure, which mainly plays a guiding role to ensure that the vacuum interrupter can be reliably contacted with the moving contact of the interrupter regardless of whether the vacuum interrupter is in the open or closed state.

[0024] A second fixing cavity extends out of the side of the circuit breaker insulation box, and the second fixing cavity penetrates the circuit breaker insulation box to allow the conductive rod to extend out of the circuit breaker insulation box.

[0025] One end of the flexible connection is connected to the moving contact of the vacuum interrupter through the connecting rod, and the other end is connected to the conductive rod.

[0026] In a preferred embodiment of the present invention, the circuit breaker insulation device with disconnector further includes a box.

[0027] The bottom of the circuit breaker insulation box is provided with a fixing seat, which is threadedly connected to the box body through the fixing seat.

[0028] The outlet terminal is fixed on the box body.

[0029] In a preferred embodiment of the present invention, the fixed busbar of the circuit breaker insulation device with disconnector is provided with a threaded through hole, and the second contact is fixed to the fixed busbar by threads and penetrates into the large inner diameter of the first fixed cavity.

[0030] In a preferred embodiment of the present invention, a slot is provided at the output end of the isolation transmission member of the circuit breaker insulation device with an isolating switch.

[0031] A clamping shaft is provided on the isolating conductive rod.

[0032] The clamping shaft is installed in the clamping slot, and when the isolation transmission member rotates, it drives the isolation conductive rod to reciprocate along the fixed cavity.

[0033] Among them, the conductive rod, flexible connection, fixed busbar, second contact, outlet terminal and first contact are all conductors.

[0034] The beneficial effects of the embodiments of the present invention are:

[0035] The circuit breaker insulation device with an isolating switch provided by the present invention has a small size, high integration, high product operation reliability, and a small product operation and maintenance workload. It not only provides external insulation protection and a support and fixing foundation for the vacuum interrupter of the circuit breaker, but also integrates an isolating conductive rod that can be used as a switch. It can realize the complete isolating switch function in conjunction with the outlet terminal, which can significantly reduce the size of the circuit breaker with the isolating switch and improve the integrity of the circuit breaker. On the other hand, the insulation device is designed for use with a common box circuit breaker. After the isolating switch is configured, the isolating switch is built into the circuit breaker box, which can protect the isolating switch from the influence of the outdoor environment, improve the operation reliability, and reduce the operation and maintenance workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0037] The circuit breaker insulation device with disconnector of the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0038] Figure 1 It is a schematic structural diagram of a circuit breaker insulation device with an isolating switch according to the present invention;

[0039] Figure 2 It is a schematic structural diagram of the circuit breaker insulation device of the present invention.

[0040] In the figure: 1-circuit breaker insulation box; 2-conductive rod; 3-support; 4-connecting rod; 5-flexible connection; 6-transmission member; 7-vacuum interrupter; 8-isolating transmission member; 9-isolating conductive rod; 10-fixed busbar; 11-second contact; 12-outgoing terminal; 13-first contact; 14-box. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0042] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0043] Please refer to Figures 1 to 2 The first embodiment of the present invention provides a circuit breaker insulation device with an isolating switch, including a circuit breaker insulation box 1, wherein the circuit breaker insulation box 1 is provided with a vacuum interrupter 7, an isolating conductive rod 9 and a fixed busbar 10.

[0044] A first fixing cavity extends out from a side surface of the circuit breaker insulation box 1 , and the first fixing cavity penetrates the circuit breaker insulation box 1 .

[0045] An outlet terminal 12 is provided on one side of the circuit breaker insulation box 1 extending out of the first fixing cavity, and a first contact 13 is fixed on the outlet terminal 12 .

[0046] The fixed busbar 10 is fixed to the inner side surface of the circuit breaker insulation box 1 on the side where the first fixed cavity is provided, one end of which is fixedly connected to the static contact end of the vacuum interrupter 7, and the other end of which is for the isolation conductive rod 9 to extend into the first fixed cavity.

[0047] The isolating conductive rod 9 reciprocates along the first fixed cavity and contacts or separates from the first contact 13 .

[0048] In a preferred embodiment of the present invention, the first contact 13 of the circuit breaker insulation device with disconnector is a plum blossom contact.

[0049] In a preferred embodiment of the present invention, an isolation transmission member 8 is further provided in the circuit breaker insulation box 1 of the circuit breaker insulation device with an isolating switch.

[0050] In a preferred embodiment of the present invention, the circuit breaker insulation device with disconnector further includes a second contact 11 .

[0051] The first fixing cavity includes a small inner diameter portion and a large inner diameter portion.

[0052] The second contact 11 extends into the large inner diameter.

[0053] The isolating conductive rod 9 passes through the second contact 11 and the small inner diameter in sequence and reciprocates.

[0054] In a preferred embodiment of the present invention, the second contact 11 of the circuit breaker insulation device with disconnector is a plum blossom contact.

[0055] In a preferred embodiment of the present invention, a support 3, a connecting rod 4, and a transmission member 6 are further provided in the circuit breaker insulation box 1 of the circuit breaker insulation device with disconnector.

[0056] The support 3 is fixedly connected to the circuit breaker insulation box 1 .

[0057] The transmission member 6 is rotatably connected to the support 3;

[0058] The input end of the transmission member 6 is connected to the upper transmission device, and the output end is connected to the connecting rod 4 through a pin, and drives the connecting rod 4 to reciprocate;

[0059] The connecting rod 4 is connected to the moving contact of the vacuum interrupter 7 , and the connecting rod 4 drives the moving contact of the vacuum interrupter 7 to close or open.

[0060] In a preferred embodiment of the present invention, a conductive rod 2 and a flexible connection 5 are further provided in the circuit breaker insulation box 1 of the circuit breaker insulation device with disconnector.

[0061] The flexible connection 5 adopts a U-shaped structure, which mainly plays a guiding role to ensure that the vacuum interrupter 7 can reliably contact the moving contact of the interrupter regardless of whether it is in the open or closed state.

[0062] A second fixing cavity extends out of the side of the circuit breaker insulation box 1 , and the second fixing cavity penetrates the circuit breaker insulation box 1 , allowing the conductive rod 2 to extend out of the circuit breaker insulation box 1 .

[0063] One end of the flexible connection 5 is connected to the moving contact of the vacuum interrupter 7 through the connecting rod 4 , and the other end is connected to the conductive rod 2 .

[0064] In a preferred embodiment of the present invention, the circuit breaker insulation device with disconnector further includes a box 14 .

[0065] The bottom of the circuit breaker insulation box 1 is provided with a fixing seat, which is threadedly connected to the box body 14 through the fixing seat.

[0066] The outlet terminal 12 is fixed on the box body 14 .

[0067] In a preferred embodiment of the present invention, the fixed busbar 10 of the circuit breaker insulation device with disconnector is provided with a threaded through hole, and the second contact 11 is fixed to the fixed busbar 10 by threads and penetrates into the large inner diameter of the first fixed cavity.

[0068] In a preferred embodiment of the present invention, a slot is provided at the output end of the isolation transmission member 8 of the circuit breaker insulation device with an isolating switch.

[0069] The isolating conductive rod 9 is provided with a clamping shaft.

[0070] The clamping shaft is installed in the clamping slot, and when the isolation transmission member 8 rotates, it drives the isolation conductive rod 9 to reciprocate along the fixed cavity.

[0071] Among them, the conductive rod 2, the flexible connection 5, the fixed busbar 10, the second contact 11, the outlet terminal 12 and the first contact 13 are all conductors.

[0072] Please refer to Figures 1 to 2 A second embodiment of the present invention provides a method for using a circuit breaker insulation device with an isolating switch:

[0073] During assembly, first connect the vacuum interrupter 7 to the fixed busbar 10, and then place the vacuum interrupter 7 and the fixed busbar 10 into the circuit breaker insulation box 1, so that the fixed busbar 10 is close to the surface of the first fixed cavity. At this time, the second contact 11 on the fixed busbar 10 is just placed in the large inner diameter of the first fixed cavity. Use screws to fix the fixed busbar 10 on the circuit breaker insulation box 1, and then use screws to connect the conductive rod 2 and the soft connection 5, and then pass the conductive rod 2 through the second fixed cavity of the circuit breaker insulation box 1 and fix it on the surface of the second fixed cavity; then connect the connecting rod 4 to the moving contact end of the vacuum interrupter 7, and then connect the transmission part 6 to the connecting rod 4 with a clamping shaft, and finally install the support 3. At this time, the transmission part 6 can control the vacuum interrupter 7 to close and open.

[0074] To realize the function of the isolating switch, the isolating conductive rod 9 is inserted into the inner hole of the second contact 11 and the first fixed cavity of the circuit breaker insulation box 1. The tail end of the isolating conductive rod 9 is connected to the isolating transmission part 8 using a clamping shaft. At this time, the isolating transmission part 8 is rotated. Driven by the crank arm of the isolating transmission part 8, the isolating conductive rod 9 can move left and right. Install the outlet terminal 12. At this time, the first contact 13 is the static contact of the isolating switch. When closing the switch, rotate the isolating transmission part 8 counterclockwise. The isolating conductive rod 9 will move to the right until it reliably contacts the first contact 13. At this time, the second contact 11 and the first contact 13 are in contact with the isolating conductive rod 9, forming a conductive path. When opening the switch, rotate the isolating transmission part 8 clockwise. The isolating conductive rod 9 will move to the left and lose contact with the first contact 13 until it reaches the opening position. At this time, an isolation fracture is formed between the isolating conductive rod 9 and the second first contact 13, isolating the high voltage.

[0075] The embodiment of the present invention is intended to protect a circuit breaker insulation device with an isolating switch, and has the following effects:

[0076] The circuit breaker insulation device with an isolating switch provided by the present invention has a small size, high integration, high product operation reliability, and a small product operation and maintenance workload. It not only provides external insulation protection and a support and fixing foundation for the vacuum interrupter of the circuit breaker, but also integrates an isolating conductive rod that can be used as a switch. It can realize the complete isolating switch function in conjunction with the outlet terminal, which can significantly reduce the size of the circuit breaker with the isolating switch and improve the integrity of the circuit breaker. On the other hand, the insulation device is designed for use with a common box circuit breaker. After the isolating switch is configured, the isolating switch is built into the circuit breaker box, which can protect the isolating switch from the influence of the outdoor environment, improve the operation reliability, and reduce the operation and maintenance workload.

[0077] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A circuit breaker insulation device with an isolating switch, characterized in that: It comprises a circuit breaker insulation box (1), wherein a vacuum interrupter (7), an isolation conductive rod (9) and a fixed busbar (10) are provided in the circuit breaker insulation box (1); A first fixing cavity extends from a side surface of the circuit breaker insulating box (1), and the first fixing cavity penetrates the circuit breaker insulating box (1); An outlet terminal (12) is provided on one side of the circuit breaker insulation box (1) extending out of the first fixed cavity, and a first contact (13) is fixed on the outlet terminal (12); The fixed busbar (10) is fixed to the inner side surface of the circuit breaker insulation box (1) on the side where the first fixed cavity is provided, one end of which is fixedly connected to the static contact end of the vacuum interrupter (7), and the other end of which is for the isolation conductive rod (9) to extend into the first fixed cavity; The isolating conductive rod (9) reciprocates along the first fixed cavity and contacts or separates from the first contact (13); The circuit breaker insulation box (1) is further provided with a support (3), a connecting rod (4), and a transmission member (6); The support (3) is fixedly connected to the circuit breaker insulation box (1); The transmission member (6) is rotatably connected to the support (3); The input end of the transmission member (6) is connected to the upper transmission device, and the output end is connected to the connecting rod (4) through a pin, and drives the connecting rod (4) to reciprocate; The connecting rod (4) is connected to the moving contact of the vacuum interrupter (7), and the connecting rod (4) drives the moving contact of the vacuum interrupter (7) to close or open; The circuit breaker insulation box (1) is further provided with a conductive rod (2) and a flexible connection (5); A second fixed cavity extends from the side of the circuit breaker insulation box (1), and the second fixed cavity penetrates the circuit breaker insulation box (1) to allow the conductive rod (2) to extend from the circuit breaker insulation box (1); One end of the flexible connection (5) is connected to the moving contact of the vacuum interrupter (7) through the connecting rod (4), and the other end is connected to the conductive rod (2); The flexible connection (5) adopts a U-shaped structure.

2. The circuit breaker insulation device with disconnector according to claim 1, characterized in that: The first contact (13) is a plum blossom contact.

3. The circuit breaker insulation device with disconnector according to claim 1, characterized in that: An isolation transmission component (8) is also provided in the circuit breaker insulation box (1); The input end of the isolation transmission member (8) is rotatably connected to the circuit breaker insulation box (1), and the output end drives the isolation conductive rod (9) to reciprocate along the fixed cavity, so that the isolation conductive rod (9) contacts or separates from the first contact (13).

4. The circuit breaker insulation device with disconnector according to claim 1, characterized in that: Also includes a second contact (11); The first fixed cavity includes a small inner diameter portion and a large inner diameter portion; The second contact (11) extends into the large inner diameter; The isolating conductive rod (9) sequentially passes through the second contact (11) and the small inner diameter portion and reciprocates.

5. The circuit breaker insulation device with disconnector according to claim 4, characterized in that: The second contact (11) is a plum blossom contact.

6. The circuit breaker insulation device with disconnector according to claim 1, characterized in that: Also includes a box (14); The bottom of the circuit breaker insulation box (1) is provided with a fixing seat, which is threadedly connected to the box body (14) via the fixing seat; The outlet terminal (12) is fixed on the box (14).

7. The circuit breaker insulation device with disconnector according to claim 4, characterized in that: The fixed busbar (10) is provided with a threaded through hole, and the second contact (11) is fixed to the fixed busbar (10) through threads and penetrates into the large inner diameter of the first fixed cavity.

8. The circuit breaker insulation device with disconnector according to claim 3, characterized in that: The output end of the isolation transmission member (8) is provided with a card slot; The isolating conductive rod (9) is provided with a clamping shaft; The clamping shaft is installed in the clamping slot, and when the isolation transmission member (8) rotates, it drives the isolation conductive rod (9) to reciprocate along the fixed cavity.

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