Novel locking grounding switch operating device

Abstract

The utility model discloses a novel locking grounding switch operating device, which relates to the technical field of grounding switch locking, and comprises a locking mechanism and a cabinet body, the locking mechanism is fixedly arranged on the cabinet body through screws, the locking mechanism is provided with an operating rod used for being inserted into the cabinet body, the operating rod is provided with a corresponding electric contact piece, and the electric contact piece is connected with the cabinet body through screws. The locking mechanism comprises a shell and a mounting panel, the shell and the mounting panel are mounted through screws, a guide sliding groove and a grounding switch operation opening are formed in the front end face of the shell, a shifting rod is slidably connected into the guide sliding groove and fixedly inserted into the control rod, a shifting block is arranged at the outer end of the shifting rod, and the shifting block is electrically connected with the grounding switch operation opening. A first transmission cavity is formed in the left side of the shell, and a second transmission cavity is formed in the right side of the shell. According to the scheme, the maintenance operation of the ring main unit can be facilitated in real time, and the grounding switch can be switched on only when the grounding switch operation shaft and the electric contact sheet act simultaneously, so that the maintenance operation safety is high.

Description

Technical Field

[0001] This utility model relates to the field of grounding switch locking technology, specifically a novel grounding switch locking operating device. Background Technology

[0002] A ring main unit (RMU) is an electrical device consisting of a set of high-voltage switchgear housed in a metal or non-metal insulated cabinet or assembled into a modular ring network power supply unit. During the maintenance of the RMU's distribution lines, closing the grounding switch while the circuit is energized is extremely dangerous and can easily damage the distribution lines. Furthermore, when the RMU uses a ring network power supply and daisy-chain wiring configuration with numerous incoming and outgoing lines, operators cannot accurately determine whether the line side is energized. In such cases, closing the grounding switch while the circuit is energized would inevitably result in a serious misoperation.

[0003] The existing publication (CN214848264U) describes a forced interlocking device for preventing accidental closing of grounding switches in a distribution network ring main unit. In this device, after a voltage anomaly is detected by the voltage switch, an electromagnet is energized, causing a sliding plate to be attracted. During this attraction, the plate compresses a return spring, causing the lock core to move to the left and engage in a locking groove, thus physically preventing the downward movement of the vertical connecting rod and achieving forced locking. However, in this design, the return spring is a consumable component, and if it is not fully reset, it is difficult to close the grounding switch, hindering maintenance. To address this, we propose a novel interlocking grounding switch operation device. Utility Model Content

[0004] The purpose of this utility model is to provide a novel interlocking grounding switch operating device to solve the problem in the existing solutions mentioned in the background art that, since the reset spring is a consumable part, it is difficult to achieve the grounding switch closing operation when the reset spring is not fully reset, which is not conducive to maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A novel locking grounding knife operating device, comprising a locking mechanism and a cabinet, wherein the locking mechanism is fixedly installed on the cabinet by screws, and the locking mechanism is provided with a control rod for inserting into the cabinet body, the control rod is provided with a corresponding electrical contact piece, the electrical contact piece and the grounding component inside the cabinet body are electrically connected, the locking mechanism includes a housing and a mounting panel, the housing and the mounting panel are installed by screws, the front end face of the housing is provided with a guide groove and a grounding knife operating port, a lever is slidably connected inside the guide groove, the lever is fixedly inserted into the control rod, and a toggle block is provided at the outer end of the lever;

[0006] A transmission cavity is provided on the left side of the housing. A rotating shaft and a grounding knife operating shaft are provided inside the transmission cavity. The rotating shaft is rotatably connected to the housing, and a gear is fixedly installed on the rotating shaft.

[0007] The right side of the transmission cavity is provided with a sliding groove for the control lever to slide. The sliding groove is internally connected to the transmission cavity and the guide groove. A rack is provided at the left end of the control lever, and the rack meshes with a gear.

[0008] The housing has a transmission cavity two on the right side. The control lever is provided with a support plate one on the side corresponding to the transmission cavity two. The transmission cavity two is provided with a support plate two on the left side. Both the support plate two and the support plate one are located inside the transmission cavity two. The support plate two and the support plate one are respectively provided with magnet one and magnet two on their opposite sides. A return spring is sleeved on the side of the support plate one facing the support plate two.

[0009] Preferably, the center lines of the lever and the control lever are perpendicular to each other, and the lever is located at the left end of the control lever.

[0010] Preferably, a sealing plate is fixedly installed at the front end of the rotating shaft, and the sealing plate is located directly in front of the grounding knife operating shaft.

[0011] Preferably, the first magnet and the second magnet are magnetically connected, and the first magnet and the second magnet are positioned opposite each other.

[0012] Preferably, the sealing plate is located directly behind the grounding switch operating port.

[0013] Preferably, the reset spring is located between the second support plate and the first support plate.

[0014] Preferably, the grounding switch operating shaft is located directly above the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This novel interlocking grounding switch operating device, by fixing an interlocking mechanism on the ring main unit, when the ring main unit is powered on, magnet one and magnet two generate magnetic force. Magnet two can drive support plate one to move closer to support plate two, thereby causing the control lever to move from right to left. This allows the sealing plate to block the grounding switch operating port. At this time, the grounding switch cannot be operated to close, further avoiding accidental operation of the grounding switch, which could cause tripping or equipment damage, and further ensuring the safety of the ring main unit.

[0017] 2. This novel interlocking grounding switch operating device, when performing maintenance operations inside the ring main unit, de-energizes the unit. At this time, there is no magnetic force between magnet one and magnet two, the return spring resets, and when the control lever moves from left to right, the meshing of gears and racks causes the gears to drive the rotating shaft and the sealing plate to swing counterclockwise 180 degrees, thus allowing the sealing plate to remove its obstruction of the grounding switch operating port. The grounding switch operating shaft inside the operating port is operated. Simultaneously, the electrical contact piece on the control lever makes electrical contact with the grounding switch assembly inside the ring main unit. The grounding switch operating shaft and the electrical contact piece work together to close the grounding switch, resulting in high safety during maintenance operations.

[0018] 3. When the reset spring fails to reset effectively, the new type of interlocking grounding switch operating device can be reset by moving the toggle block, which facilitates timely maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation state of the structure of this utility model;

[0021] Figure 3 This is a cross-sectional view of the present invention.

[0022] Figure 4 For the present utility model Figure 3 A magnified diagram of point N;

[0023] Figure 5 This is a schematic diagram of the longitudinal section structure of this utility model;

[0024] Figure 6 For the present utility model Figure 5 Enlarged schematic diagram at point M;

[0025] Figure 7 This is a schematic diagram of the grounding switch operating port of this utility model in an unobstructed state;

[0026] Figure 8 This is a schematic diagram of the grounding switch operating port of this utility model in a blocked state.

[0027] Figure 9 This is a schematic diagram of the control lever structure of this utility model.

[0028] In the diagram: 1. Cabinet; 2. Locking mechanism; 21. Housing; 210. Grounding knife operating shaft; 22. Mounting panel; 23. Grounding knife operating port; 24. Guide groove; 25. Actuating block; 261. Transmission chamber one; 262. Transmission chamber two; 27. Control lever; 271. Support plate one; 272. Support plate two; 273. Sealing plate; 274. Electrical contact piece; 275. Return spring; 276. Magnet one; 277. Magnet two; 278. Lever; 28. Rotating shaft; 291. Gear; 292. Rack. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example: Please refer to Figure 1-9 This utility model provides a technical solution: a novel locking grounding knife operating device, including a locking mechanism 2 and a cabinet 1. The locking mechanism 2 is fixedly installed on the cabinet 1 by screws. The locking mechanism 2 is provided with a control lever 27 for insertion into the cabinet 1. The control lever 27 is provided with a corresponding electrical contact piece 274. The electrical contact piece 274 is electrically connected to the grounding component inside the cabinet 1. The locking mechanism 2 includes a housing 21 and a mounting panel 22, which are installed by screws. The front end face of the housing 21 is provided with a guide groove 24 and a grounding knife operating port 23. A lever 278 is slidably connected inside the guide groove 24. The lever 278 is fixedly inserted into the control lever 27, and a toggle block 25 is provided at the outer end of the lever 278. The center lines of the lever 278 and the control lever 27 are perpendicular to each other, and the lever 278 is located at the left end of the control lever 27. The toggle block 25 is located on the outside of the housing 21. The toggle block 25 facilitates manual operation of the grounding switch to close.

[0031] Please see Figure 3 The housing 21 has a transmission cavity 261 on its left side. Inside the transmission cavity 261 are a rotating shaft 28 and a grounding switch operating shaft 210. The rotating shaft 28 is rotatably connected to the housing 21, and the grounding switch operating shaft 210 is located directly above the rotating shaft 28. The grounding switch operating shaft 210 can be used to operate the grounding switch with the assistance of a tool. The grounding switch can only be closed when the grounding switch operating shaft 210 and the electrical contact piece 274 on the control lever 27 are simultaneously connected, further ensuring operational safety.

[0032] Furthermore, a gear 291 is fixedly mounted on the rotating shaft 28; a sealing plate 273 is fixedly mounted on the front end of the rotating shaft 28, and the sealing plate 273 is located directly in front of the grounding switch operating shaft 210. The sealing plate 273 is located directly behind the grounding switch operating port 23. When the control lever 27 moves from left to right, through the meshing action of the gear 291 and the rack 292, the gear 291 drives the rotating shaft 28 and the sealing plate 273 to swing counterclockwise by 180 degrees. Figure 8 State transition Figure 7 This allows the sealing plate 273 to be removed from obstructing the grounding knife operation port 23; conversely, when the control lever 27 moves from right to left, through the meshing of gear 291 and rack 292, gear 291 drives the rotating shaft 28 and the sealing plate 273 from... Figure 7 The state shown swings 180 degrees clockwise, from Figure 7 State transition Figure 8 In this state, the sealing plate 273 can block the grounding switch operation port 23, and at this time, the grounding switch cannot be closed, further ensuring the operational safety of the line.

[0033] Furthermore, a sliding groove for sliding the control lever 27 is provided on the right side of the transmission cavity 261. The sliding groove is internally connected to the transmission cavity 261 and the guide groove 24. A rack 292 is provided at the left end of the control lever 27, and the rack 292 meshes with the gear 291.

[0034] Please see Figure 3 and Figure 4 The housing 21 has a transmission cavity 262 on the right side. A support plate 271 is provided on the side of the control lever 27 corresponding to the transmission cavity 262. The support plate 272 is provided on the left side of the transmission cavity 262. Both the support plate 272 and the support plate 271 are located inside the transmission cavity 262. Magnets 276 and 277 are respectively provided on the opposite sides of the support plate 272 and the support plate 271. Both magnets 276 and 277 are electromagnets. After the ring main unit is energized, magnets 276 and 277 generate magnetic force. Magnet 277 can drive the support plate 271 to move closer to the support plate 272, thereby causing the control lever 27 to move from right to left. This allows the sealing plate 273 to block the grounding switch operation port 23. At this time, the grounding switch cannot be closed, further ensuring the operational safety of the line.

[0035] In this example, a return spring 275 is sleeved on the side of support plate 271 facing support plate 272. The return spring 275 is located between support plate 272 and support plate 271. Magnet 1 276 and magnet 277 are magnetically connected, and their left and right positions correspond to each other. The function of the return spring 275 is to facilitate the reset of support plate 272, so that in the initial state, the sealing plate 273 is removed from obstructing the grounding knife operation port 23.

[0036] Working Principle: In this novel interlocking grounding switch operating device, during the operation of the ring main unit (RNB), magnets 276 and 277 generate magnetic force. Magnet 277 moves support plate 271 closer to support plate 272, causing the control lever 27 to move from right to left. This allows the sealing plate 273 to block the grounding switch operating port 23, preventing the grounding switch from closing and thus avoiding accidental operation that could cause tripping or equipment damage. During RNB maintenance, when the RNB is de-energized, there is no magnetic force between magnets 276 and 277, and the return spring 2... When the control lever 27 moves from left to right, the meshing of gear 291 and rack 292 causes gear 291 to drive the rotating shaft 28 and the sealing plate 273 to swing counterclockwise by 180 degrees. This allows the sealing plate 273 to remove its obstruction of the grounding switch operating port 23, making the grounding switch operating port 23 operable. At the same time, the electrical contact piece 274 on the control lever 27 makes electrical contact with the grounding switch assembly inside the ring main unit cabinet 1, enabling the grounding switch to be closed during maintenance. This ensures high safety during maintenance operations. If the reset spring 275 fails to reset effectively, the reset operation can be performed by using the toggle block 25.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel locking ground knife operating device, comprising a locking mechanism (2) and a cabinet body (1), the locking mechanism (2) is fixedly installed on the cabinet body (1) by screws, a control rod (27) is arranged on the locking mechanism (2) and inserted into the cabinet body (1), a corresponding electric contact sheet (274) is arranged on the control rod (27), the electric contact sheet (274) is electrically connected with a grounding assembly in the cabinet body (1), characterized in that: The locking mechanism (2) comprises a shell (21) and a mounting panel (22), the shell (21) and the mounting panel (22) are installed by screws, a guide sliding groove (24) and a grounding knife operation opening (23) are arranged on the front end surface of the shell (21), a push rod (278) is slidably connected in the guide sliding groove (24), the push rod (278) is fixedly connected with a control lever (27), and a push block (25) is arranged at the outer end of the push rod (278); ​ A transmission cavity one (261) is arranged on the left side of the shell (21), a rotating shaft (28) and a grounding knife operation shaft (210) are arranged in the transmission cavity one (261), the rotating shaft (28) is rotatably connected with the shell (21), and a gear (291) is fixedly installed on the rotating shaft (28); A sliding groove for sliding of the control lever (27) is arranged on the right side surface of the transmission cavity one (261), the sliding groove is in communication with the transmission cavity one (261) and the guide sliding groove (24), a rack (292) is arranged at the left end of the control lever (27), and the rack (292) is engaged with the gear (291); A transmission cavity two (262) is arranged on the right side of the shell (21), a supporting plate one (271) is arranged on the side of the transmission cavity two (262) corresponding to the control lever (27), a supporting plate two (272) is arranged on the left side of the transmission cavity two (262), the supporting plate two (272) and the supporting plate one (271) are arranged in the transmission cavity two (262), a magnet one (276) and a magnet two (277) are arranged on the opposite surfaces of the supporting plate two (272) and the supporting plate one (271) respectively, and a reset spring (275) is sleeved on the side of the supporting plate one (271) opposite to the supporting plate two (272).

2. A novel operating device for an earth blade according to claim 1, characterized in that: The center lines of the push rod (278) and the control lever (27) are perpendicular to each other, and the push rod (278) is arranged at the left end of the control lever (27).

3. A new type of operating device for a lock-and-earth knife according to claim 1, characterized in that: The rotating shaft (28) is fixedly installed with an enclosing plate (273), and the enclosing plate (273) is arranged in front of the grounding knife operation shaft (210).

4. A new type of operating device for an earth blade according to claim 1, characterized in that: The magnet one (276) and the magnet two (277) are magnetically connected, and the left and right positions of the magnet one (276) and the magnet two (277) correspond to each other.

5. A novel operating device for an earth blade according to claim 3, characterized in that: The enclosing plate (273) is arranged on the back side of the grounding knife operation opening (23).

6. A new type of operating device for an earth blade according to claim 1, characterized in that: The reset spring (275) is arranged between the supporting plate two (272) and the supporting plate one (271).

7. A new type of operating device for a lock-and-earth knife according to claim 1, characterized in that: The grounding knife operation shaft (210) is arranged above the rotating shaft (28).

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