Isolation switch and grounding switch linkage interlocking device

Abstract

A disconnecting switch and grounding switch linkage interlocking device comprises a linkage disc, a grounding switch base is installed on one side of the linkage disc, a disconnecting switch base is installed on the other side of the linkage disc, a rotating shaft is fixedly connected to the bottom of the linkage disc, a coupler is fixedly arranged at the end, away from the linkage disc, of the rotating shaft, and the rotating shaft is fixedly connected with a main shaft through the coupler. A worm gear is fixedly arranged at the bottom of the main shaft, a worm is installed on one side of the worm gear, and the end of the worm is movably connected with a stabilizing base through a bearing. According to the linkage interlocking device for the disconnecting switch and the grounding switch, a linkage disc rotary isolating sheet is inserted into a disconnecting switch seat, and an isolating circuit is conducted; linkage switching and locking between the grounding line and the isolation line can be achieved by rotating the linkage disc, a crank arm linkage mode is replaced, the situations that joints of a crank arm are abraded in frequent operation and a transmission gap is gradually enlarged are avoided, and the risk of short circuit is reduced.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment, specifically to an interlocking device for a disconnecting switch and a grounding switch. Background Technology

[0002] A disconnector is a high-voltage switchgear without an arc-extinguishing device. Its main function is to create a clear disconnect point during the maintenance of electrical equipment or lines, isolate the power supply, and ensure maintenance safety. A grounding switch is a switchgear used to reliably connect electrical equipment or lines to the earth. Its main purpose is to prevent sudden power surges or eliminate residual charges on the equipment during maintenance. A search revealed Chinese patent CN218730615U, which discloses an integrated interlocking protection device for a power distribution network disconnector and grounding switch. The device includes a bracket with wiring mounted on it, a disconnector operating rod with a disconnector assembly mounted on it for opening and closing operations of the disconnector, and a grounding switch operating rod with a grounding switch assembly mounted on it for opening and closing operations of the grounding switch. In the aforementioned device, the linkage mechanism links the isolating switch operating rod and the grounding switch operating rod. The linkage mechanism includes an S-rod, with one end of the grounding switch operating rod movably connected to the left end of the S-rod, and one end of the isolating switch operating rod movably connected to the right end of the S-rod. However, in actual use, the linkage mechanism uses a crank linkage method. The joints of the crank arm (such as pins and bearing connection points) will wear down during frequent operation. As the operating time increases, the transmission clearance gradually increases, which may lead to the linkage action being "ahead" or "behind". For example, the grounding switch may start to close before the isolating switch is fully open, violating the logic of "opening the isolating switch first and then closing the grounding switch", which poses a short circuit risk. Summary of the Invention

[0003] The purpose of this invention is to provide an interlocking device for disconnecting switches and grounding switches to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, a linkage interlocking device for disconnecting switch and grounding switch is provided, including a linkage plate (1), the linkage plate (1) is connected to a grounding switch base (15), the linkage plate (1) is connected to a disconnecting switch base (14), the linkage plate (1) is connected to a rotating shaft (2), the rotating shaft (2) is connected to a coupling (3), the rotating shaft (2) is connected to a main shaft (5) via the coupling (3), the bottom of the main shaft (5) has a worm wheel (6), the worm wheel (6) meshes with a worm (7), the worm (7) is hinged to a stabilizing seat (8), and a drive shaft (9) is installed at the end of the worm (7).

[0005] The aforementioned isolating switch and grounding switch linkage interlocking device has a linkage disk (1) externally equipped with a grounding plate (12) and an isolation plate (13). The grounding plate (12) and the isolation plate (13) are both provided with slots. The linkage disk (1) is connected to the worm gear (6) through the bottom rotating shaft (2), coupling (3) and main shaft (5). The main shaft (5) is hinged to the support seat (4), and the support seat (4) is equipped with a stabilizing seat (8).

[0006] The aforementioned isolating switch and grounding switch linkage interlocking device has a grounding plate (12) and an isolating plate (13) arranged in a "V" shape. There is a wiring terminal (11) between the grounding plate (12) and the isolating plate (13). The wiring terminal (11) is connected to the linkage plate (1). The grounding plate (12) and the isolating plate (13) are both connected to the intervention seat (121).

[0007] The aforementioned interlocking device for disconnecting switch and grounding switch has a linkage disk (1) with a rotating grounding plate (12) inserted into the grounding switch base (15), and a linkage disk (1) with a rotating isolation plate (13) inserted into the disconnecting switch base (14). The isolation line is connected, and both the grounding switch base (15) and the disconnecting switch base (14) have connecting seats (151). Beneficial effects

[0008] 1. This solution uses a rotating linkage disc to connect the grounding plate inside the grounding switch base, ensuring the grounding line is connected; the rotating linkage disc also connects the rotating isolation plate inside the isolating switch base, ensuring the isolating line is connected; the linkage switching and locking between the grounding line and the isolating line can be achieved by rotating the linkage disc, replacing the use of a crank arm linkage, thus avoiding wear on the crank arm joints during frequent operation and the gradual increase in transmission clearance, reducing the risk of short circuits.

[0009] 2. This solution uses a main shaft to drive the linkage disc to rotate via a coupling and a rotating shaft. The coupling is made of plastic and can achieve an insulated connection between the rotating shaft and the main shaft. A drive shaft is provided at the end of the worm gear, and a drive structure can be installed at the end of the drive shaft. The drive structure includes, but is not limited to, a handwheel and a stepper motor. The worm gear and worm have self-locking properties, which can ensure the stability of the electrical connection of the grounding plate, grounding switch seat or isolating plate, isolating switch seat. Attached Figure Description

[0010] Figure 1 This is a front view schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Top view; Figure 3 for Figure 1 A bottom view; Figure 4 for Figure 1 Side view; Figure 5 This is a schematic diagram of the linkage disk and its cross-sectional structure of the present invention.

[0011] The following are the labels in the diagram: 1. Linkage plate; 11. Terminal block; 12. Grounding plate; 121. Interception seat; 13. Isolation plate; 14. Disconnecting switch seat; 15. Grounding switch seat; 151. Connecting seat; 2. Rotating shaft; 3. Coupling; 4. Support seat; 5. Main shaft; 6. Worm gear; 7. Worm; 8. Stabilizing seat; 9. Drive shaft. Detailed Implementation

[0012] Please see Figure 1-5 This invention provides an interlocking device for a disconnecting switch and a grounding switch, including a linkage plate 1. A grounding switch seat 15 is installed on one side of the linkage plate 1, and a disconnecting switch seat 14 is installed on the other side of the linkage plate 1. A rotating shaft 2 is fixedly connected to the bottom of the linkage plate 1. A coupling 3 is fixedly installed at the end of the rotating shaft 2 away from the linkage plate 1. A main shaft 5 is fixedly connected to the rotating shaft 2 through the coupling 3. A worm gear 6 is fixedly installed at the bottom of the main shaft 5. A worm 7 is installed on one side of the worm gear 6. A stabilizing seat 8 is movably connected to the end of the worm 7 through a bearing. A drive shaft 9 is fixedly installed at the end of the worm 7.

[0013] Working principle: Both the grounding switch base 15 and the isolating switch base 14 are U-shaped. The rotating linkage disk 1 rotates and the grounding plate 12 is inserted into the inside of the grounding switch base 15, and the grounding line is connected. The rotating linkage disk 1 rotates and the isolating plate 13 is inserted into the inside of the isolating switch base 14, and the isolating line is connected. The linkage switching and locking between the grounding line and the isolating line can be achieved by rotating the linkage disk 1, which replaces the use of the crank arm linkage method. This avoids the wear of the crank arm joint during frequent operation and the gradual increase of the transmission clearance, thus reducing the risk of short circuit.

[0014] In a preferred embodiment, the linkage plate 1 is circular, and a grounding plate 12 and an isolation plate 13 are respectively installed on the outer circumference of the linkage plate 1. Both the grounding plate 12 and the isolation plate 13 have slots, and the ends of the grounding plate 12 and the isolation plate 13 are arc-shaped.

[0015] The grounding plate 12 and the isolation plate 13 are arranged in a "V" shape. A terminal 11 is provided between the grounding plate 12 and the isolation plate 13. The terminal 11 is fixedly connected to the outer ring surface of the linkage disk 1. An intervention seat 121 is provided at the end of both the grounding plate 12 and the isolation plate 13. The intervention seat 121 is "L" shaped and the end of the intervention seat 121 is rounded.

[0016] Both the grounding switch base 15 and the disconnecting switch base 14 are U-shaped. The rotating grounding plate 12 of the linkage disk 1 is inserted into the inside of the grounding switch base 15, and the grounding line is connected. The rotating isolating plate 13 of the linkage disk 1 is inserted into the inside of the disconnecting switch base 14, and the isolation line is connected.

[0017] like Figure 1-4 As shown: Centered on the rotating linkage disc 1, it directly drives the grounding plate 12 to be inserted into the grounding switch base 15 and the isolating plate 13 to be inserted into the isolating switch base 14. This eliminates the need for multiple sets of connecting rods, hinges, and other complex components required for the articulated arm linkage, reducing overall space occupation and facilitating installation layout in compact electrical equipment. Operation is also more convenient and efficient: compared to the multi-stage swing of the articulated arm linkage, the rotational motion has a shorter force transmission path and less loss. Operators only need to rotate the linkage disc 1 to switch the grounding plate 12 with the grounding switch base 15 and the isolating plate 13 with the isolating switch base 14, making operation less strenuous and faster, thus improving the efficiency of line switching operations. Higher efficiency; higher reliability of linkage: the articulated boom linkage is prone to delays or misalignments due to wear and loosening of multiple connection points, while the rotary linkage disk 1 directly drives the insertion action of the grounding plate 12 and the isolation plate 13, reducing intermediate transmission links and lowering the risk of incomplete connection or disconnection of the grounding or isolation line due to component failure, ensuring the accuracy of linkage switching; more stable locking performance: after the rotary linkage disk 1 completes the switching, it can directly achieve locking through the self-locking performance of the worm gear 6 and worm 7. Compared with the articulated boom linkage which relies on the multi-component cooperative locking method, the locking state is more stable, which can effectively prevent accidental operation and ensure the stability of the working state of the grounding line and the isolation line.

[0018] In a preferred embodiment, both the grounding switch base 15 and the isolating switch base 14 are fixedly provided with connecting seats 151 at their ends, and the connecting seats 151 are provided with mounting holes at their ends.

[0019] The linkage disk 1 is fixedly connected to the worm gear 6 through the bottom rotating shaft 2, coupling 3 and main shaft 5. The outer side of the main shaft 5 is movably mounted with a support seat 4 through a bearing. The bottom of the support seat 4 is mounted with a stable seat 8 through a support frame. The worm gear 6 and worm 7 are matched in size and are meshed together.

[0020] like Figure 1-4 As shown: The rotation method of the linkage disk 1 is as follows: When the worm gear 7 rotates, it can drive the main shaft 5 to rotate through the worm wheel 6. The main shaft 5 drives the linkage disk 1 to rotate through the coupling 3 and the rotating shaft 2. The coupling 3 is made of plastic and can realize the insulated connection between the rotating shaft 2 and the main shaft 5. The end of the worm gear 7 is provided with a drive shaft 9. The end of the drive shaft 9 can be equipped with a drive structure, including but not limited to a handwheel and a stepper motor. The worm wheel 6 and the worm gear 7 have self-locking performance, which can ensure the stability of the electrical connection of the grounding plate 12, the grounding switch seat 15 or the isolation plate 13 and the isolation switch seat 14. The structure uses a worm gear 7 to drive a worm wheel 6, which in turn drives the linkage disk 1 to rotate via a main shaft 5, a plastic coupling 3, and a rotating shaft 2. The self-locking performance of the worm gear 7 and worm wheel 6 ensures the stability of the grounding plate 12 and grounding switch base 15, and the isolating plate 13 and isolating switch base 14 when electrically connected, preventing accidental operation. The plastic coupling 3 reliably achieves an insulated connection between the rotating shaft 2 and the main shaft 5, ensuring electrical safety. The end of the drive shaft 9 can be flexibly fitted with a handwheel or stepper motor, accommodating both manual and automatic operation needs and offering wider applicability. The overall transmission path is clear, and the power transmission through the worm gear 7, worm wheel 6, main shaft 5, coupling 3, rotating shaft 2, and linkage disk 1 is precise and efficient. Combined with the self-locking characteristic, this further enhances the reliability and stability of the linkage switching.

Claims

1. A device for interlocking a disconnector and a grounding switch, comprising a linkage panel (1), characterized in that: The linkage plate (1) is connected to the grounding switch seat (15), the linkage plate (1) is connected to the isolating switch seat (14), the linkage plate (1) is connected to the rotating shaft (2), the rotating shaft (2) is connected to the coupling (3), the rotating shaft (2) is connected to the main shaft (5) via the coupling (3), the bottom of the main shaft (5) has a worm wheel (6), the worm wheel (6) meshes with the worm (7), the worm (7) is hinged to the stabilizing seat (8), and the end of the worm (7) is equipped with a drive shaft (9).

2. The interlocking device for disconnecting switch and grounding switch according to claim 1, characterized in that: The linkage disk (1) is equipped with a grounding plate (12) and an isolation plate (13). The grounding plate (12) and the isolation plate (13) are both provided with slots. The linkage disk (1) is connected to the worm gear (6) through the bottom rotating shaft (2), coupling (3) and main shaft (5). The main shaft (5) is hinged to the support seat (4). The support seat (4) is equipped with a stabilizing seat (8).

3. The interlocking device for disconnecting switch and grounding switch according to claim 2, characterized in that: The grounding plate (12) and the isolation plate (13) are arranged in a "V" shape. There is a terminal (11) between the grounding plate (12) and the isolation plate (13). The terminal (11) is connected to the linkage plate (1). The grounding plate (12) and the isolation plate (13) are both connected to the intervention seat (121).

4. The interlocking device for disconnecting switch and grounding switch according to claim 3, characterized in that: The rotating grounding plate (12) of the linkage disk (1) is inserted into the inside of the grounding switch seat (15), and the rotating isolation plate (13) of the linkage disk (1) is inserted into the inside of the isolation switch seat (14). The isolation line is connected. Both the grounding switch seat (15) and the isolation switch seat (14) have a connecting seat (151).

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