All-insulation pole-mounted circuit breaker with built-in direct-acting disconnecting switch

Abstract

An all-insulated pole-mounted circuit breaker with a built-in direct-acting disconnecting switch is characterized in that an arc extinguish chamber pole and a direct-acting disconnecting switch structure are arranged, a transparent glass cover is arranged at the position of an inlet wire disconnecting switch pole, and a moving contact of a moving contact assembly is connected with an isolating crank arm through an insulating pull rod; the movable contact and the static contact are sealed in the transparent glass cover, the on-off state can be observed through the glass cover, a fracture can be seen, in addition, the switch is isolated from the outside, long-term effective operation of the switch is guaranteed, and the service life of the switch is prolonged. And the performance is more stable and reliable.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology, and particularly relates to a fully insulated column-mounted circuit breaker with a built-in direct-acting isolating switch. Background Art

[0002] When the isolating switch and the circuit breaker are configured as two devices, they are installed on the poles separately, which takes up a lot of space and has many and messy wiring. In addition, the circuit breaker terminals, the isolating switch terminals and the blade are completely exposed to the air, which are easily affected by the environment, causing corrosion and inconvenient operation. In addition, short circuits are easily formed by falling debris or branches overlapping the exposed conductive parts, including frequent power outages caused by various foreign objects, which affect people's production and life.

[0003] When the isolating switch and the circuit breaker are integrated, they are installed on the pole as a device, but the circuit breaker terminals, the isolating switch terminals and the blade are still completely exposed to the air, which are easily affected by the environment, resulting in corrosion, inconvenient operation and other problems. In addition, falling debris or branches overlapping the exposed conductive parts are prone to short circuit problems, including frequent power outages caused by various foreign objects, which affect people's production and life.

[0004] The utility model with announcement number CN216562924U discloses a column-box type high-voltage switch, the key points of its technical solution include an upper column shell, a lower box shell and an intermediate fixing plate made of insulating material, a high-voltage passage component is arranged in the upper column shell, a low-voltage control component is arranged in the lower box shell, and the intermediate fixing plate is used to fix the upper column shell and the lower box shell; its high-voltage passage components are all sealed in the upper column shell, and the isolation of high and low pressure is achieved by the upper column shell and the lower box shell, but the overall sealing, the fracture is not visible, and the operational safety needs to be improved. Summary of the invention

[0005] The purpose of the utility model is to address the deficiencies of the above-mentioned prior art and to provide a fully insulated column-mounted circuit breaker with a built-in direct-acting disconnector, in which the circuit breaker and the disconnector are installed together to reduce the installation space, and the disconnector and the circuit breaker are sealed to avoid exposure and pollution.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A fully insulated column-mounted circuit breaker with a built-in direct-acting disconnector, comprising a lower box, an arc-extinguishing chamber pole arranged above the lower box, and a direct-acting disconnector structure, wherein an isolation main shaft and an isolation crank arm rotatably connected thereto are arranged in the lower box;

[0008] The isolating switch structure comprises a static contact assembly, a moving contact assembly and a glass cover installed between the static contact assembly and the moving contact assembly, wherein the static contact assembly is arranged above the moving contact assembly and is connected to the arc extinguishing chamber pole through a connecting row;

[0009] The moving contact of the moving contact assembly is connected to the isolating crank arm through an insulating pull rod, and moves back and forth vertically under the action of the isolating crank arm, driving the moving contact to move up and down to realize the closing and opening of the switch.

[0010] The moving contact assembly also includes an insulating support fixed on the lower box body and an incoming line terminal installed in the insulating support. The insulating pull rod passes through the insulating support and is connected to the moving contact, and the lower end of the insulating pull rod is connected to the isolation crank arm sliding pin, and a crank arm sliding groove is correspondingly opened on the isolation crank arm.

[0011] The glass cover comprises a cover body and an upper fixing seat and a lower fixing seat fixedly arranged outside the cover body, wherein the upper fixing seat is fixedly connected to the static contact assembly, the lower fixing seat is fixedly connected to the insulating support, and the joint of the moving contact and the static contact is located inside the cover body.

[0012] The moving contact of the moving contact assembly and the insulating pull rod are arranged coaxially in the vertical direction.

[0013] The incoming terminal is die-cast connected to the insulating support.

[0014] A protective cap is also fixedly provided on the top of the stationary contact assembly.

[0015] The moving contact of the moving contact assembly is coated with fluorescent powder.

[0016] The beneficial effects of the utility model are:

[0017] (1) The built-in direct-acting disconnector fully insulated column-mounted circuit breaker is provided with an arc extinguishing chamber pole and a direct-acting disconnector structure, and a transparent glass cover is provided at the disconnector pole of the incoming line. The moving contact of the moving contact assembly is connected to the isolating crank arm through an insulating pull rod, and moves back and forth vertically under the action of the isolating crank arm, driving the moving contact to move up and down to realize the closing and opening of the switch. The moving and static contacts are enclosed in the transparent glass cover, and the closing and opening states can be observed through the glass cover, so that the fracture is visible. In addition, it is also isolated from the outside world, ensuring the long-term and effective operation of the switch and ensuring more stable and reliable performance.

[0018] (2) The moving contact of the isolating switch is coated with fluorescent powder, which can be easily observed from a distance.

[0019] (3) The isolation spindle is equipped with a motor, which can drive the isolation spindle to rotate and realize electric operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 yes Figure 1 A cross-sectional view of

[0022] Figure 3 It is a side view of the utility model. DETAILED DESCRIPTION

[0023] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0024] The utility model provides a fully insulated column mounted circuit breaker with a built-in direct-acting isolating switch, such as Figures 1 to 3 shown.

[0025] A fully insulated column-mounted circuit breaker with a built-in direct-acting disconnector comprises a lower box, an arc extinguishing chamber pole 5 arranged above the lower box, and a direct-acting disconnector structure, wherein an isolation main shaft and an isolation crank arm 2-1 rotatably connected thereto are arranged in the lower box; the isolation main shaft is equipped with a motor, which can drive the isolation main shaft to rotate, thereby realizing electric operation drive.

[0026] The isolating switch structure comprises a static contact assembly, a moving contact assembly and a glass cover 2 installed therebetween. The static contact assembly is arranged above the moving contact assembly and is conductively connected to the arc extinguishing chamber pole 5 through a connecting row 4.

[0027] The moving contact of the moving contact assembly is connected to the isolating arm 2-1 through the insulating pull rod 2-3, and moves back and forth vertically under the action of the isolating arm 2-1, driving the moving contact 2-5 to move up and down to realize the closing and opening of the switch; for the convenience of observation, the moving contact 2-5 is also coated with fluorescent powder to facilitate long-distance observation of the opening and closing state of the isolating switch.

[0028] The moving contact assembly also includes an insulating support 2-2 fixed on the lower box body and an incoming terminal 2-4 installed in the insulating support 2-2, the incoming terminal 2-4 is die-cast connected to the insulating support 2-2, the insulating pull rod 2-3 passes through the insulating support 2-2 and is connected to the moving contact 2-5, and the lower end of the insulating pull rod 2-3 is connected to the sliding pin of the isolation crank arm 2-1, and the isolation crank arm 2-1 is correspondingly provided with a crank arm sliding groove. In this embodiment, the moving contact 2-5 and the insulating pull rod 2-3 are arranged coaxially along the vertical direction.

[0029] The glass cover includes a cover body and an upper fixing seat and a lower fixing seat fixed outside the cover body, and the upper fixing seat is fixedly connected to the static contact assembly, the lower fixing seat is fixedly connected to the insulating support 2-2, and the joint of the moving contact 2-5 and the static contact 2-7 is located in the cover body.

[0030] The stationary contact assembly includes stationary contacts 2-7, conductor parts fixed thereto, an insulating seal body correspondingly covered on the outside, and a protective cap 3 fixed on the top of the insulating seal body. The insulating seal body is also correspondingly covered on the outside of the connecting row 4 and fixed to the arc extinguishing chamber pole 5.

[0031] During installation, the cover body of the glass cover 2 is installed on the glass cover fixing seat 2-6, the insulating support 2-2 is installed from the bottom and fixed with screws, the incoming line disconnector pole is assembled into a whole, and then fixed on the lower box, which can realize component assembly and improve installation efficiency.

[0032] The moving contact 2-5 is connected to the insulating pull rod 2-3, and the insulating pull rod 2-3 is connected to the pin of the isolation crank arm 2-1, and the pin can slide in the crank arm slide slot. The isolating switch handle 7 rotates, driving the isolation main shaft to rotate, and then driving the isolation crank arm 2-1 to swing, and the moving contact 2-5 is pushed up and down through the insulating pull rod 2-3 to achieve the closing and opening of the switch. The moving contact 2-5 and the static contact 2-7 are located in a transparent glass cover, which can ensure that when the isolating switch is closed or opened, the closing and opening state can be observed from the outside through the glass cover. Preferably, in order to facilitate long-distance observation, the moving contact of the isolating switch is also coated with fluorescent powder.

[0033] The built-in direct-acting disconnector is a fully insulated column-mounted circuit breaker, which integrates the disconnector inside the circuit breaker. The disconnector adopts the "direct-acting" style, and the moving and static contacts are enclosed in a transparent glass cover. The closed and open states can be observed through the glass cover, making the break visible. In addition, it is also isolated from the outside world, ensuring the long-term and effective operation of the switch and ensuring more stable and reliable performance.

[0034] If the words "first", "second" and so on are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words have no special meaning.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

[0036] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "left", "right", "center", 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.

Claims

1. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector, characterized in that: It includes a lower box body, an arc extinguishing chamber pole arranged above the lower box body, and a direct-acting isolating switch structure, and the lower box body is provided with an isolating main shaft and an isolating crank arm rotatably connected thereto; The isolating switch structure comprises a static contact assembly, a moving contact assembly and a glass cover installed between the static contact assembly and the moving contact assembly, wherein the static contact assembly is arranged above the moving contact assembly and is connected to the arc extinguishing chamber pole through a connecting row; The moving contact of the moving contact assembly is connected to the isolating crank arm through an insulating pull rod, and moves back and forth vertically under the action of the isolating crank arm, driving the moving contact to move up and down to realize the closing and opening of the switch.

2. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector according to claim 1, characterized in that: The moving contact assembly also includes an insulating support fixed on the lower box body and an incoming line terminal installed in the insulating support. The insulating pull rod passes through the insulating support and is connected to the moving contact, and the lower end of the insulating pull rod is connected to the isolation crank arm sliding pin, and a crank arm sliding groove is correspondingly opened on the isolation crank arm.

3. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector according to claim 2, characterized in that: The glass cover comprises a cover body and an upper fixing seat and a lower fixing seat fixedly arranged outside the cover body, wherein the upper fixing seat is fixedly connected to the static contact assembly, the lower fixing seat is fixedly connected to the insulating support, and the joint of the moving contact and the static contact is located inside the cover body.

4. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector according to claim 2, characterized in that: The moving contact of the moving contact assembly and the insulating pull rod are arranged coaxially in the vertical direction.

5. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector according to claim 2, characterized in that: The incoming terminal is die-cast connected to the insulating support.

6. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector according to any one of claims 1 to 5, characterized in that: A protective cap is also fixedly provided on the top of the stationary contact assembly.

7. A fully insulated column mounted circuit breaker with a built-in direct-acting disconnector according to claim 6, characterized in that: The moving contact of the moving contact assembly is coated with fluorescent powder.

Images