Modularized disconnecting switch and gas insulation switch cabinet

Abstract

The utility model relates to the technical field of switch equipment, and provides a modular disconnecting switch and a gas insulated switchgear, the modular disconnecting switch comprises a transmission shaft, a plurality of moving contacts and a transmission mechanism matched with the moving contacts, one end of each moving contact is hinged to a contact seat, and the other end of each moving contact is a free end; each set of transmission mechanism comprises two first connecting plates, one sides of the two first connecting plates are sleeved on the transmission shaft, the first connecting plates rotate along with the transmission shaft, the other sides of the two first connecting plates are respectively hinged with one sides of two second connecting plates, the other sides of the two second connecting plates are connected with a cushion block through a rotating shaft, and the middle part of the cushion block is connected with a moving contact through a third connecting plate; and the second connecting plates and the cushion blocks are positioned above the contact seat, so that the free end of the moving contact passes through a space enclosed by the two second connecting plates and the cushion blocks. Compared with the prior art, the cost is lower, the unit is modularized, batch production can be achieved, and when an overhaul problem occurs, the problem can be visually judged.

Description

Technical Field

[0001] This application relates to the field of switchgear technology, specifically to a modular disconnect switch and a gas-insulated switch cabinet. Background Technology

[0002] In power systems, SF6 gas-insulated metal-enclosed switchgear, used in medium-voltage power distribution, typically employs two main configuration schemes: one is an integrated three-position disconnector switch scheme, which uses a single operating mechanism to achieve interlocking control of line switching and grounding functions; the other is a combination of a three-position disconnector switch and a circuit breaker, adding a dedicated circuit breaker module to the former to achieve fault current interruption. Both of these switchgear schemes suffer from inconvenient installation and high cost. Utility Model Content

[0003] To help solve the above-mentioned technical problems, this application provides a modular disconnecting switch and a gas-insulated switchgear.

[0004] Firstly, this application provides a modular disconnect switch, which adopts the following technical solution:

[0005] A modular disconnect switch includes a drive shaft, a plurality of moving contacts and a transmission mechanism that cooperates with the moving contacts, wherein one end of the moving contact is hinged to a contact seat and the other end is a free end;

[0006] Each transmission mechanism includes two first connecting plates with one side sleeved on the transmission shaft. The first connecting plates rotate together with the transmission shaft. The other side of the two first connecting plates is respectively hinged to one side of two second connecting plates. The other side of the two second connecting plates is connected to a pad through a rotating shaft. The middle of the pad is connected to a moving contact through a third connecting plate. The second connecting plates and the pad are located above the contact seat so that the free end of the moving contact passes through the space enclosed by the two second connecting plates and the pad.

[0007] Preferably, the modular disconnect switch includes a disconnect switch frame, which includes disconnect switch bracket side plates on the left and right sides and disconnect switch bracket bent plates on the front and rear sides. The contact seat is installed inside the rear side of the disconnect switch frame. Square holes that mate with the outer contour of the drive shaft are provided on one side of the first connecting plate and the disconnect switch bracket side plate. The drive shaft passes through all the square holes and is installed inside the front side of the disconnect switch frame.

[0008] Preferably, a disconnector insulator support plate is installed inside the rear side of the disconnector frame, and an insulator is installed on the disconnector insulator support plate, with the insulator connected to the contact head seat.

[0009] Preferably, a drive shaft control component is fitted onto one end of the drive shaft extending out of the side plate of the disconnector switch bracket, one end of the mechanism crank arm is connected to the three-position switch mechanism, and the other end is movably connected to the drive shaft control component.

[0010] Preferably, a grounding busbar support plate is provided on the lower side inside the disconnector frame, and a grounding busbar is provided on the grounding busbar support plate for grounding the induced current.

[0011] Preferably, the modular disconnect switch has a main busbar on its upper side and a stationary contact on its lower part.

[0012] Secondly, this application provides a gas-insulated switchgear, which adopts the following technical solution:

[0013] A gas-insulated switchgear, wherein the switchgear includes: a main busbar located on the upper side of the switchgear, with both ends of the main busbar installed on the side plates of the switchgear, and stationary contacts provided at the lower part of the main busbar;

[0014] The modular disconnect switch as described in any one of the first aspects above is located on the lower side of the main busbar, and the modular disconnect switch controls the free end of the moving contact to contact and disconnect from the stationary contact;

[0015] The three-position switch mechanism is located on the lower side of the modular disconnect switch. The three-position switch mechanism is connected to the drive shaft inside the modular disconnect switch through a mechanism crank arm.

[0016] In summary, this application has the following advantages:

[0017] In terms of cost: Compared with existing technologies, this application has a lower cost. The three-position disconnect switch of this application is mainly composed of sheet metal and copper busbars. The overall frame is mainly made of sheet metal welding, with a short production cycle, and the processing cost of the copper busbars is relatively low.

[0018] Regarding installation and maintenance: Compared to existing technologies, the modular design of this application allows for mass production. Furthermore, assembly is convenient, with the overall frame welded and the copper busbars assembled. When maintenance issues arise, the location of the problem can be visually identified. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the modular disconnect switch of this application;

[0020] Figure 2 for Figure 1 Top view of the embodiment shown;

[0021] Figure 3 This is a schematic diagram of the gas-insulated switchgear of this application;

[0022] Figure 4 This is a schematic diagram of the drive shaft control component of this application.

[0023] Reference numerals in the attached drawings: 1-Three-position mechanism bent plate; 2-Second connecting plate; 3-Padded block; 4-Moving contact; 5-Right side plate of disconnector bracket; 6-Front bent plate of disconnector bracket; 7-Front bent plate of three-position mechanism; 8-First connecting plate; 9-Drive shaft; 10-Left side plate of disconnector bracket; 11-Contact seat; 12-Insulator; 13-Three-position switch mechanism; 14-Main busbar; 15-Stationary contact; 16-Modular disconnector; 17-Mechanical crank arm; 18-Drive shaft control component; 19-Third connecting plate; 20-First connecting plate; 21-Second connecting plate. Detailed Implementation

[0024] The present application will be further described below with reference to the accompanying drawings. The structure and principle of the present application are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0025] Figure 1 This is a schematic diagram of the overall structure of the modular disconnect switch of this application. Figure 2 for Figure 1 Top view of the embodiment shown. Figure 3 This is a schematic diagram of the gas-insulated switchgear of this application. Figure 4 This is a schematic diagram of the drive shaft control component of this application.

[0026] Combination Figures 1 to 4 It is understood that the modular disconnect switch 16 of this application includes a drive shaft 9, a plurality of moving contacts 4 and a transmission mechanism that cooperates with the moving contacts 4. One end of the moving contact 4 is hinged to the contact seat 11, and the other end is a free end. Each transmission mechanism includes two first connecting plates 8 with one side sleeved on the drive shaft 9. The first connecting plates 8 rotate together with the drive shaft 9. The other side of the two first connecting plates 8 is respectively hinged to one side of two second connecting plates 2. The other side of the two second connecting plates 2 is connected to the pad 3 through a rotating shaft. The middle of the pad 3 is connected to the moving contact 4 through a third connecting plate 19. The second connecting plates 2 and the pad 3 are located above the contact seat 11 so that the free end of the moving contact 4 passes through the space enclosed by the two second connecting plates 2 and the pad 3.

[0027] The drive shaft 9 drives the first connecting plate 8 to rotate. Through the linkage of the second connecting plate 2 and the third connecting plate 19, the rotational motion is converted into the linear or arc motion of the moving contact 4, ensuring precise contact / separation between the free end of the moving contact 4 and the stationary contact 15, reducing contact resistance and arcing. The moving contact 4 is hinged to the contact seat 11, facilitating independent replacement or maintenance and reducing maintenance costs. The free end of the moving contact 4 passes through the space enclosed by the second connecting plate 2 and the pad 3, resulting in a compact structure and reduced equipment size.

[0028] The modular disconnect switch 16 includes a disconnect switch frame, which includes disconnect switch bracket side plates (left disconnect switch bracket 10 and right disconnect switch bracket 5) on the left and right sides, and disconnect switch bracket bent plates (front disconnect switch bracket 6 and rear disconnect switch bracket 6, not shown in the figure) on the front and rear sides. A contact seat 11 is installed inside the rear side of the disconnect switch frame. Square holes that mate with the outer contour of the drive shaft 9 are provided on one side of the first connecting plate 8 and on the disconnect switch bracket side plates (left disconnect switch bracket 10 / right disconnect switch bracket 5). The drive shaft 9 passes through all the square holes and is installed inside the front side of the disconnect switch frame. A disconnect switch insulator support plate is installed inside the rear side of the disconnect switch frame, and an insulator 12 is installed on the disconnect switch insulator support plate, with the insulator 12 connected to the contact seat 11.

[0029] The side plates of the disconnector bracket include the left side plate 10 and the right side plate 5 of the disconnector bracket. The bent plates of the disconnector bracket include the front bent plate 6 and the rear bent plate (not shown in the figure). The front bent plate 7 and the rear bent plate 1 of the three-station mechanism are also provided on the front and rear sides respectively.

[0030] The square hole mates with the outer contour of the drive shaft 9 to eliminate axial movement and ensure transmission accuracy. The contact seat 11 is pre-installed inside the rear of the frame, enabling modular assembly. On-site installation only requires fixing the frame, which can shorten installation time.

[0031] A drive shaft control component 18 is fitted onto one end of the drive shaft 9 extending from the side plate of the disconnector bracket (left side plate 10 of the disconnector bracket / right side plate 5 of the disconnector bracket). One end of the mechanism crank arm 17 is connected to the three-position switch mechanism 13, and the other end is movably connected to the drive shaft control component 18. The drive shaft control component 18 includes a first connecting plate 20 rotatably connected to the mechanism crank arm 17 and a second connecting plate fixed to the first connecting plate 20.

[0032] The lower side of the internal frame of the disconnecting switch is provided with a grounding busbar support plate, and a grounding busbar is provided on the grounding busbar support plate for grounding the induced current. The upper side of the modular disconnecting switch 16 is provided with a main busbar 14, and the lower part of the main busbar 14 is provided with a stationary contact 15.

[0033] This application also provides a gas-insulated switchgear including the aforementioned modular disconnector 16. The switchgear includes a main busbar 14, the modular disconnector 16, and a three-position switch mechanism 13. The main busbar 14 is located on the upper side of the switchgear, with both ends mounted on the side plates of the switchgear. A stationary contact 15 is provided at the lower part of the main busbar 14. The modular disconnector 16 is located below the main busbar 14, and controls the free end of the moving contact 4 to contact and disengage from the stationary contact 15. The three-position switch mechanism 13 is located below the modular disconnector 16, and is connected to the drive shaft 9 within the modular disconnector 16 via a mechanism crank arm 17.

[0034] During operation, the mechanical crank arm 17 can be controlled by the three-position switch mechanism 13, which in turn controls the rotation of the transmission shaft 9. The transmission shaft 9 will drive the transmission mechanism, which in turn drives the movement of the contact 4, ultimately realizing the contact and separation of the moving contact 4 and the stationary contact 15, thereby realizing the opening and closing of the circuit breaker.

Claims

1. A modular disconnect switch, comprising a drive shaft, a plurality of moving contacts, and a transmission mechanism cooperating with the moving contacts, characterized in that, One end of the moving contact is hinged to the contact seat, and the other end is a free end; Each transmission mechanism includes two first connecting plates with one side sleeved on the transmission shaft. The first connecting plates rotate together with the transmission shaft. The other side of the two first connecting plates is respectively hinged to one side of two second connecting plates. The other side of the two second connecting plates is connected to a pad through a rotating shaft. The middle of the pad is connected to a moving contact through a third connecting plate. The second connecting plates and the pad are located above the contact seat so that the free end of the moving contact passes through the space enclosed by the two second connecting plates and the pad.

2. The modular disconnect switch according to claim 1, characterized in that, The modular disconnect switch includes a disconnect switch frame, which includes disconnect switch bracket side plates on the left and right sides and disconnect switch bracket bent plates on the front and rear sides. The contact seat is installed inside the rear side of the disconnect switch frame. Square holes that match the outer contour of the drive shaft are opened on one side of the first connecting plate and the disconnect switch bracket side plate. The drive shaft passes through all the square holes and is installed inside the front side of the disconnect switch frame.

3. The modular disconnect switch according to claim 1, characterized in that, The disconnector switch frame has an insulator support plate installed on the rear side, and the insulator is installed on the insulator support plate. The insulator is connected to the contact head seat.

4. The modular disconnect switch according to claim 1, characterized in that, A drive shaft control component is fitted onto one end of the drive shaft that extends out of the side plate of the disconnector switch bracket. One end of the mechanism crank arm is connected to the three-position switch mechanism, and the other end is movably connected to the drive shaft control component.

5. The modular disconnect switch according to claim 2, characterized in that, The lower side of the inside of the disconnector frame is provided with a grounding busbar support plate for the disconnector, and a grounding busbar for the disconnector is provided on the grounding busbar support plate for grounding the induced current.

6. The modular disconnect switch according to claim 1, characterized in that, The modular disconnect switch has a main busbar on its upper side and a stationary contact on its lower part.

7. A gas-insulated switchgear, characterized in that, The switch cabinet includes; The main busbar is located on the upper side of the switchgear. Both ends of the main busbar are installed on the side panels of the switchgear, and stationary contacts are provided at the lower part of the main busbar. The modular disconnect switch as described in any one of claims 1 to 6 is located on the lower side of the main busbar, and the modular disconnect switch controls the free end of the moving contact to contact and disconnect from the stationary contact; The three-position switch mechanism is located on the lower side of the modular disconnect switch. The three-position switch mechanism is connected to the drive shaft inside the modular disconnect switch through a mechanism crank arm.

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