Double-isolation fracture high-voltage switch body

Abstract

The utility model discloses a double-isolation fracture high-voltage switch body, which comprises a bottom frame, supporting side plates, a cross rod, a grounding contact seat, an isolation contact assembly, an arc extinguish chamber mounting framework, a vacuum arc extinguish chamber and an opening and closing assembly, the supporting side plates are fixedly mounted on two sides of the bottom frame, and the cross rod is fixedly mounted at the front ends of the lower parts of the two supporting side plates. The plurality of grounding contact seats are arranged on the cross rod at equal intervals, the isolation contact assembly is fixedly arranged below the two supporting side plates, the arc extinguish chamber mounting framework is fixedly arranged above the two supporting side plates, the vacuum arc extinguish chamber is arranged on the arc extinguish chamber mounting framework, and the opening and closing assembly is arranged above the vacuum arc extinguish chamber; by matching the transmission angle of the isolation contact assembly, optimizing the break angle of the end part of the double-fracture isolation contact knife and reasonably arranging the positions of the grounding contact seat and the upper isolation static contact, the reliability and safety of operation are improved, the durability and the arc extinguishing performance are enhanced, and the high-voltage switch can better adapt to the application of the high-voltage switch in an electric power system.

Description

Technical Field

[0001] This utility model specifically relates to a high-voltage switch body with double isolation breaks. Background Technology

[0002] The isolation break design used in existing high-voltage switch bodies is typically a single-break three-position disconnector. This means that after the disconnection shaft opens, a single break is formed between the moving contact, the upper stationary contact, and the grounding contact. The other end of the moving contact remains fixedly connected to the lower stationary contact below its rotation point. This single, fixed-distance break must meet the insulation withstand voltage requirements between the live conductor and ground.

[0003] With the increasing technical requirements for miniaturization and high performance of high-voltage switches, the external dimensions of the high-voltage switch body and its enclosure are constantly shrinking, and the distance formed by a single break is no longer sufficient to meet the insulation withstand voltage requirements. Therefore, it is necessary for those skilled in the art to develop a high-voltage switch to replace the existing single-break solution. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a high-voltage switch body with double isolation contacts.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A double-isolation high-voltage switch body includes a base frame, supporting side plates, crossbars, grounding contacts, isolating contact components, arc-extinguishing chamber mounting frame, vacuum arc-extinguishing chamber, and opening / closing components. The supporting side plates are fixedly installed on both sides of the base frame, and the crossbars are fixedly installed at the lower front end of the two supporting side plates. Several grounding contacts are provided and are equidistantly installed on the crossbars. The isolating contact components are fixedly installed below the two supporting side plates, the arc-extinguishing chamber mounting frame is fixedly installed above the two supporting side plates, the vacuum arc-extinguishing chamber is installed on the arc-extinguishing chamber mounting frame, and the opening / closing components are installed above the vacuum arc-extinguishing chamber.

[0007] Preferably, three grounding contacts are provided.

[0008] Preferably, the isolation contact assembly includes an isolation contact rotating shaft, three lower phase insulating partitions fixedly mounted at equal intervals on the isolation contact rotating shaft, crank arms mounted at equal intervals on the isolation contact rotating shaft and separated by the lower phase insulating partitions, and double-break isolation contact blades mounted on both sides above the crank arms.

[0009] Furthermore, the crank arm is a semi-circular crank arm casting, with mounting slots for assembling isolation blades on both sides of its upper end.

[0010] Furthermore, the two ends of the double-break isolation contact blade are inclined upwards and have isolation contact blade contact heads.

[0011] Preferably, the lower end of the vacuum interrupter is equipped with an upper isolating stationary contact.

[0012] Preferably, the opening and closing assembly includes an opening and closing shaft, three upper phase insulating partitions fixedly installed at equal intervals on the opening and closing shaft, a rotating disk installed at equal intervals on the opening and closing shaft and separated by the upper phase insulating partitions, an arc-shaped sliding groove formed on the rotating disk, a mounting sleeve embedded inside the rotating disk and in clearance fit with the rotating disk, a sliding wheel passing through the arc-shaped sliding groove and fixedly installed with the mounting sleeve, a sliding rod mated with the mounting sleeve and extending into the vacuum interrupter chamber, and a return spring fitted on the sliding rod.

[0013] Furthermore, the arc-shaped sliding groove includes an arc-shaped sliding opening end and an arc-shaped sliding closing end, and the distance from the arc-shaped sliding opening end to the axis of the opening and closing shaft is less than the distance from the arc-shaped sliding closing end to the axis of the opening and closing shaft.

[0014] The beneficial effects of this utility model are as follows: By optimizing the shape and position of the isolating contact blade, especially the angle design of the contact head, the contact position of the switch body is more reasonable, the overall size of the switch is reduced, thereby achieving a more compact design and saving space. The isolating contact assembly adopts the contact method of isolating contact blade contact head with grounding contact base and upper isolating stationary contact, ensuring a more stable electrical connection and disconnection process, improving the operational reliability of the switch. Moreover, by using a non-linear contact blade with double-break isolating contact blades, the contact heads of the isolating contact blades at both ends have a certain degree of bend. For the same break distance, the rotation working angle of the isolating contact rotating shaft can be reduced, that is, the contact position layout of the switch body is more reasonable, achieving the effect of a smaller overall size of the switch. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the body of a double-isolation high-voltage switch according to the present invention;

[0016] Figure 2 for Figure 1 Cross-sectional structural diagram after the base frame has been removed;

[0017] Figure 3 for Figure 1 A magnified view of partial view A in the middle;

[0018] Figure 4 for Figure 1 A magnified view of partial view B in the middle. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0020] Example

[0021] A type of double-isolation high-voltage switch body, such as Figure 1-4 As shown, the system includes a base frame 1, supporting side plates 2, crossbars 3, grounding contacts 4, isolation contact components 5, arc-extinguishing chamber mounting frame 6, vacuum arc-extinguishing chamber 7, and opening / closing components 8. The supporting side plates 2 are fixedly installed on both sides of the base frame 1, and the crossbars 3 are fixedly installed at the lower front end of the two supporting side plates 2. Several grounding contacts 4 are provided and are installed equidistantly on the crossbars 3. The isolation contact components 5 are fixedly installed below the two supporting side plates 2. The arc-extinguishing chamber mounting frame 6 is fixedly installed above the two supporting side plates 2. The vacuum arc-extinguishing chamber 7 is installed on the arc-extinguishing chamber mounting frame 6, and the opening / closing components 8 are installed above the vacuum arc-extinguishing chamber 7.

[0022] The isolation contact assembly 5 includes an isolation contact rotating shaft 51, three lower phase-to-phase insulating partitions 52 equidistantly fixed on the isolation contact rotating shaft 51, crank arms 53 equidistantly installed on the isolation contact rotating shaft 51 and separated by the lower phase-to-phase insulating partitions 52, and double-break isolation contact blades 54 mounted on both sides above the crank arms 53. Specifically, the first and second isolation contact blades are attached to the crank arms 53 and then fitted with double-headed studs and fixed with nuts.

[0023] The crank arm 53 is a semi-circular crank arm casting 53, with mounting slots 531 for assembling isolation contact blades 54 on both sides of its upper end.

[0024] The two ends of the double-break isolation contact 54 are inclined upward and have isolation contact heads 541.

[0025] The lower end of the vacuum interrupter 7 is equipped with an upper isolating stationary contact 71.

[0026] It should be further explained that the double-break isolation contact 54 contacts the grounding contact 4 and the upper isolating stationary contact 71 through the isolation contact head 541. The double-break isolation contact 54 adopts a non-linear contact, and the isolation contact heads 541 at both ends have a certain degree of bend. For the same break distance, the rotation angle of the isolation contact rotation shaft 51 can be reduced, that is, the contact position layout of the switch body is more reasonable, and the switch body has a smaller overall size.

[0027] The opening and closing assembly 8 includes an opening and closing shaft 81, three upper phase insulating partitions 82 equidistantly fixed on the opening and closing shaft 81, a rotating disk 83 equidistantly installed on the opening and closing shaft 81 and separated by the upper phase insulating partitions 82, an arc-shaped sliding groove 84 formed on the rotating disk 83, a mounting sleeve 85 embedded inside the rotating disk 83 and in clearance fit with the rotating disk 83, a sliding wheel 86 passing through the arc-shaped sliding groove 84 and fixedly installed with the mounting sleeve 85, a sliding rod 87 assembled with the mounting sleeve 85 and extending into the vacuum interrupter 7, and a return spring 88 fitted on the sliding rod 87.

[0028] It should be further explained that the sliding rod 87, as a moving contact, can isolate the stationary contact 71 from the internal contact of the vacuum interrupter 7.

[0029] The arc-shaped sliding groove 84 includes an arc-shaped sliding opening end 841 and an arc-shaped sliding closing end 842. The distance from the arc-shaped sliding opening end 841 to the axis of the opening and closing shaft 81 is less than the distance from the arc-shaped sliding closing end 842 to the axis of the opening and closing shaft 81.

[0030] When the vacuum interrupter 7 is opened or closed, the opening and closing shaft 81 rotates forward or backward within a certain angle range, so that the sliding wheel 86 can move along the arc-shaped sliding groove 84 to the arc-shaped sliding opening end 841 and the arc-shaped sliding closing end 842. Then, the sliding rod 87 separates from or abuts against the upper isolating stationary contact 71, thereby improving the convenience of opening and closing the vacuum interrupter.

[0031] In this embodiment, three grounding contacts 4 are provided. Specifically, there are three crank arms 53 equipped with double-break isolation blades 54, three vacuum interrupters 7, and three opening and closing components 8, which can realize three-position opening and closing operation or grounding operation.

[0032] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A high-voltage switch body with double isolation contacts, characterized in that, It includes a base frame, supporting side plates, crossbars, grounding contacts, isolating contact components, arc-extinguishing chamber mounting frame, vacuum arc-extinguishing chamber, and opening / closing components. The supporting side plates are fixedly installed on both sides of the base frame, the crossbars are fixedly installed at the lower front end of the two supporting side plates, several grounding contacts are provided and are installed equidistantly on the crossbars, the isolating contact components are fixedly installed below the two supporting side plates, the arc-extinguishing chamber mounting frame is fixedly installed above the two supporting side plates, the vacuum arc-extinguishing chamber is installed on the arc-extinguishing chamber mounting frame, and the opening / closing components are installed above the vacuum arc-extinguishing chamber.

2. The high-voltage switch body with double isolation contacts according to claim 1, characterized in that, There are three grounding contacts.

3. The high-voltage switch body with double isolation contacts according to claim 1, characterized in that, The isolation contact assembly includes an isolation contact rotating shaft, three lower phase insulating partitions fixedly mounted at equal intervals on the isolation contact rotating shaft, crank arms mounted at equal intervals on the isolation contact rotating shaft and separated by the lower phase insulating partitions, and double-break isolation contact blades mounted on both sides above the crank arms.

4. The high-voltage switch body with double isolation contacts according to claim 3, characterized in that, The crank arm is a semi-circular crank arm casting, with mounting slots for assembling isolation contact blades on both sides of its upper end.

5. The high-voltage switch body with double isolation contacts according to claim 3, characterized in that, The two ends of the double-break isolation contact blade are inclined upwards and have isolation contact blade heads.

6. The high-voltage switch body with double isolation contacts according to claim 1, characterized in that, The lower end of the vacuum interrupter is equipped with an upper isolating stationary contact.

7. The high-voltage switch body with double isolation contacts according to claim 1, characterized in that, The opening and closing assembly includes an opening and closing shaft, three upper phase insulating partitions fixedly installed at equal intervals on the opening and closing shaft, a rotating disk installed at equal intervals on the opening and closing shaft and separated by the upper phase insulating partitions, an arc-shaped sliding groove opened on the rotating disk, a mounting sleeve embedded inside the rotating disk and in clearance fit with the rotating disk, a sliding wheel passing through the arc-shaped sliding groove and fixedly installed with the mounting sleeve, a sliding rod mated with the mounting sleeve and extending into the vacuum interrupter chamber, and a return spring fitted on the sliding rod.

8. The high-voltage switch body with double isolation contacts according to claim 7, characterized in that, The arc-shaped sliding groove includes an arc-shaped sliding opening end and an arc-shaped sliding closing end. The distance from the arc-shaped sliding opening end to the axis of the opening and closing shaft is less than the distance from the arc-shaped sliding closing end to the axis of the opening and closing shaft.

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