Grounding interlocking mechanism of switch cabinet

Abstract

The utility model discloses a switchgear's earthing interlock mechanism, and its technical scheme main points include front door interlock part, rear door interlock part and earthing switch interlock part, and the front door interlock part and rear door interlock part are connected with earthing switch interlock part through connecting axle and connecting strip respectively, the rear door interlock part includes lock block, padlock push -on, drive board and linkage, the lock block fixed setting is on the rear door of switchgear, padlock push -on telescopic realization and the lock of lock block, drive board telescopic and through linkage will the power of telescopic be converted into the power of drive padlock push -on telescopic. The utility model has the advantages of more reliable structure uses, especially, the reliability of rear door interlock part greatly increases.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and more specifically to a grounding interlocking mechanism for switchgear. Background Technology

[0002] The main function of switchgear is to open, close, control, and protect electrical equipment during the power generation, transmission, distribution, and energy conversion processes of a power system. To ensure the safety of maintenance personnel, switchgear should be equipped with a grounding interlock mechanism. Existing grounding interlock mechanisms, such as the one disclosed in CN215378240U (a type of grounding interlock for a medium-voltage switchgear), rely on a rotating locking hook and a door hinge on the rear door for locking. The door hinge drives the locking hook, which in turn engages the door hinge. However, during use, it has been found that if the ground is uneven or the rear door tilts after prolonged use, the door hinge, which both drives and engages with the locking hook, is prone to failure due to accumulated misalignment, posing a safety hazard. Therefore, this structure has certain drawbacks and needs improvement. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the present invention provides a grounding interlocking mechanism for switch cabinets, which has the advantages of more reliable structure and use, especially the reliability of the rear door interlocking component is greatly increased.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grounding interlocking mechanism for a switchgear, comprising a front door interlocking component, a rear door interlocking component, and a grounding switch interlocking component, wherein the front door interlocking component and the rear door interlocking component are respectively connected to the grounding switch interlocking component via a connecting shaft and a connecting strip; characterized in that: the rear door interlocking component comprises a lock block, a locking push plate, a drive plate, and a linkage component; the lock block is fixedly mounted on the rear door of the switchgear; the locking push plate extends and retracts longitudinally to lock and unlock the lock block; the drive plate extends and retracts laterally and converts the power of the lateral extension and retraction into the power to drive the longitudinal extension and retraction of the locking push plate via the linkage component.

[0005] The present invention is further configured such that: the outer end of the drive plate abuts against the rear door, and the inner end is provided with a spring member, which drives the drive plate to extend to one side of the rear door.

[0006] The present invention is further configured such that the inner end of the drive board is connected to the connecting strip.

[0007] The present invention is further configured such that: the linkage component is provided with a rotating hole and connecting holes located on both sides of the rotating hole; the drive plate and the upper locking push plate are both provided with connecting pins; and the connecting pins cooperate with the connecting holes.

[0008] The present invention is further configured such that: the rear door interlocking component includes a frame component, and the locking push plate, drive plate and linkage component are all disposed within the frame component.

[0009] The present invention is further configured such that: the grounding unlocking interlocking component includes a base plate, a connecting shaft is rotatably fitted on the base plate and a locking plate is slidably fitted on the base plate, the locking plate is connected to the connecting strip; the connecting shaft is provided with a limiting ring with a notch, and the locking plate includes a blocking part; when the blocking part is engaged in the notch of the limiting ring, it hinders the rotation of the connecting shaft; when the blocking part moves out of the notch of the limiting ring, it releases the obstruction to the connecting shaft.

[0010] The present invention is further configured such that the grounding switch interlocking component includes an upper crank arm that rotates synchronously with the connecting shaft, a lower crank arm that rotates synchronously with the operating shaft of the grounding switch, and a linkage mechanism that links the upper and lower crank arms.

[0011] The present invention is further configured such that: the front door interlocking component includes a lock plate that moves up and down, a lock rod that drives the lock plate, and a cam disc that drives the lock rod, wherein the rotating shaft of the cam disc rotates coaxially with the connecting shaft.

[0012] In summary, this utility model has the following beneficial effects:

[0013] The rear door interlocking component of this utility model consists of a drive plate that abuts against the rear door. The closing of the rear door causes the drive plate to move laterally, and the drive plate and the linkage drive the upper locking push plate to move up and down and lock with the lock block of the rear door. Thus, the lock block only locks with the upper locking push plate, and the power is provided by the drive plate. Even if the ground is uneven or the rear door tilts after long-term use, the matching error will not accumulate, and the upper locking push plate can still lock the lock block well with minimal impact, making it more reliable in use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the grounding interlocking mechanism.

[0015] Figure 2 This is a schematic diagram of the rear door interlocking component.

[0016] Figure 3 This is a schematic diagram of the structure of the rear door interlocking component, including the locking block and the locking push plate, when locked.

[0017] Figure 4 This is a schematic diagram of the grounding switch interlocking component.

[0018] Figure 5 This is a schematic diagram of the structure when the grounding switch interlocking component is operable.

[0019] Figure 6 This is a schematic diagram of the front door interlocking component.

[0020] Reference numerals: 1. Front door interlock component; 101. Lock plate; 102. Lock rod; 103. Cam plate; 2. Rear door interlock component; 201. Lock block; 202. Upper locking push plate; 203. Drive plate; 204. Linkage component; 205. Frame component; 3. Grounding opening interlock component; 301. Base plate; 302. Upper crank arm; 303. Lower crank arm; 304. Linkage mechanism; 13. Connecting shaft; 23. Connecting strip; 4. Spring component; 5. Rotating hole; 6. Connecting hole; 7. Connecting pin; 8. Locking plate; 801. Blocking part; 9. Limiting ring; 901. Notch; 10. Bend plate. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] This embodiment discloses a grounding interlocking mechanism for a switchgear, such as... Figure 1-6 As shown, the device includes a front door interlock component 1, a rear door interlock component 2, and a grounding switch interlock component 3. The front door interlock component 1 and the rear door interlock component 2 are connected to the grounding switch interlock component 3 via a connecting shaft 13 and a connecting strip 23, respectively. The connecting shaft 13 is a hexagonal shaft for easy transmission of rotational power, and the connecting strip 23 has a flat structure, minimizing the space occupied inside the rear door and providing a greater safety distance from phase C. Alternatively, the connecting strip 23 can be made of insulated metal material for higher security. The rear door interlock component 2 of this invention includes a lock block 201, a locking push plate 202, a drive plate 203, and a linkage component 204. The lock block 201 is fixedly mounted on the rear door of the switch cabinet. The locking push plate 202 extends and retracts longitudinally to lock and unlock the lock block 201. The drive plate 203 extends and retracts laterally, and the linkage component 204 converts the lateral extension power into the power to drive the longitudinal extension and retraction of the locking push plate 202. (Refer to...) Figure 2-3The lock block 201 has a horizontal groove for the locking push plate 202 to insert. When the locking push plate 202 moves upward, it locks the lock block 201. When the locking push plate 202 moves downward, it unlocks the lock block. The locking mechanism of this invention uses the up-and-down movement of the locking push plate 202, rather than the arc-shaped hinge movement of existing mechanisms. The movement method is simpler and more reliable. At the same time, the lock block 201 is only locked in place. The power of the locking push plate 202 is provided by the drive plate 203. Therefore, the matching error during locking and the matching error of driving the drive plate 203 will not be superimposed, making it more reliable in use. Specifically, in the existing technology, the door hinge drives the lock hook, and then the lock hook hooks the door hinge. There are two matching relationships. If the door hinge is offset, it will not be able to push the lock hook into place, and the locking will fail. Or, although the door hinge can push the lock hook into place, if there is a problem with the connection between the door hinge and the lock hook, it will also fail. Therefore, the reliability of the existing technology is generally poor when the foundation is uneven or the back door tilts and shakes after long-term use. Furthermore, the horizontal and vertical movement of this utility model is simpler and more reliable.

[0023] Further reference Figure 2-3 The outer end of the drive plate 203 abuts against the rear door, and the inner end is equipped with a spring 4. The spring 4 drives the drive plate 203 to extend towards the rear door. When the rear door of the switch cabinet (not shown in the figure) is closed, it will drive the drive plate 203 from... Figure 2 The state of being pushed to Figure 3 In this state, the drive plate 203 moves laterally. The inner end of the drive plate 203 is connected to the connecting strip 23, so the connecting strip 23 will also move in the same direction. Furthermore, the linkage 204 is provided with a rotating hole 5 and connecting holes 6 located on both sides of the rotating hole 5. Both the drive plate 203 and the locking push plate 202 are provided with connecting pins 7. The connecting pins 7 cooperate with the connecting holes 6. When the drive plate 203 moves laterally, it forms a lever structure through the hinge of the rotating hole 5 of the linkage 204, thereby driving the locking push plate 202 to move up and down.

[0024] Furthermore, the rear door interlock component 2 includes a frame component 205, a locking push plate 202, a drive plate 203, and a linkage component 204, all of which are housed within the frame component 205. The frame component 205 is fixed inside the switch cabinet for overall support.

[0025] Furthermore, refer to Figure 4-5 The grounding unlocking interlocking component 3 includes a base plate 301, on which a connecting shaft 13 is rotatably fitted and a locking plate 8 is slidably fitted. The locking plate 8 is connected to the connecting strip 23. The connecting shaft 13 is provided with a limiting ring 9 with a notch. The locking plate 8 includes a blocking part 801. When the blocking part 801 is engaged in the notch of the limiting ring 9, it hinders the rotation of the connecting shaft 13. When the blocking part 801 moves out of the notch of the limiting ring 9, it releases the obstruction to the connecting shaft 13. With the above structure, when the back door is opened, it is... Figure 4In the current state, the grounding switch cannot be operated. When the back door is closed, the connecting bar 23 is pushed and transmitted to the card plate 8, causing the blocking part 801 to move out of the notch 901, thereby allowing the connecting shaft 13 to rotate and the grounding switch to be operated.

[0026] Furthermore, the grounding switch interlocking component 3 includes an upper crank arm 302 that rotates synchronously with the connecting shaft 13, a lower crank arm 303 that rotates synchronously with the operating shaft of the grounding switch, and a linkage mechanism 304 that links the upper crank arm 302 and the lower crank arm 303. The lower crank arm 303 has a cross-sectional shape adapted to the operating shaft of the grounding switch, thereby enabling the grounding switch to operate.

[0027] Furthermore, the front door interlock component 1 includes a lock plate 101 that moves up and down, a lock rod 102 that drives the lock plate 101, and a cam disk 103 that drives the lock rod 102. The rotating shaft of the cam disk 103 rotates coaxially with the connecting shaft 13. The lock plate 101 has a locking groove for locking with the front door of the switch cabinet (not shown in the figure). A spring is fitted on the lock rod 101, which drives the lock plate 101 to move upward, locking the front door. The cam disk 103 drives the lock rod 101 to move downward, unlocking the front door. Thus, locking and unlocking the front door can be achieved by rotating the connecting shaft 13. The front interlock component 1 also has a curved plate 10, which can slide up and down to block the operating hole of the connecting shaft 13. This is the same as in the prior art and will not be described again in this embodiment. This invention also optimizes the structure of the rear door interlock component, allowing the connecting strip 23 to be relatively shorter, thereby shortening the overall size of the grounding interlock mechanism and better adapting to switch cabinets of different specifications.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grounding interlocking mechanism for a switchgear, comprising a front door interlocking component (1), a rear door interlocking component (2), and a grounding switch interlocking component (3), wherein the front door interlocking component (1) and the rear door interlocking component (2) are respectively connected to the grounding switch interlocking component (3) via a connecting shaft (13) and a connecting strip (23); characterized in that: The rear door interlocking component (2) includes a lock block (201), a locking push plate (202), a drive plate (203), and a linkage (204). The lock block (201) is fixedly installed on the rear door of the switch cabinet. The locking push plate (202) extends and retracts longitudinally to lock and unlock the lock block (201). The drive plate (203) extends and retracts laterally and converts the power of the lateral extension and retraction into the power to drive the locking push plate (202) to extend and retract longitudinally through the linkage (204).

2. The grounding interlocking mechanism for a switchgear according to claim 1, characterized in that: The outer end of the drive plate (203) abuts against the rear door, and the inner end is provided with a spring (4). The spring (4) drives the drive plate (203) to extend to one side of the rear door.

3. The grounding interlocking mechanism for a switchgear according to claim 2, characterized in that: The inner end of the drive board (203) is connected to the connecting strip (23).

4. The grounding interlocking mechanism for a switchgear according to claim 1, characterized in that: The linkage component (204) is provided with a rotating hole (5) and connecting holes (6) located on both sides of the rotating hole (5). The drive plate (203) and the upper locking push plate (202) are both provided with connecting pins (7), and the connecting pins (7) cooperate with the connecting holes (6).

5. A grounding interlocking mechanism for a switchgear according to any one of claims 1-4, characterized in that: The rear door interlocking component (2) includes a frame component (205), and the locking push plate (202), drive plate (203) and linkage component (204) are all disposed within the frame component (205).

6. The grounding interlocking mechanism for a switchgear according to claim 1, characterized in that: The grounding switch interlocking component (3) includes a base plate (301), on which a connecting shaft (13) is rotatably fitted and a locking plate (8) is slidably fitted. The locking plate (8) is connected to the connecting strip (23). The connecting shaft (13) is provided with a limiting ring (9) with a notch. The locking plate (8) includes a blocking part (801). When the blocking part (801) is inserted into the notch of the limiting ring (9), it hinders the rotation of the connecting shaft (13). When the blocking part (801) moves out of the notch of the limiting ring (9), it releases the obstruction to the connecting shaft (13).

7. The grounding interlocking mechanism for a switchgear according to claim 1, characterized in that: The grounding switch interlocking component (3) includes an upper crank arm (302) that rotates synchronously with the connecting shaft (13), a lower crank arm (303) that rotates synchronously with the operating shaft of the grounding switch, and a linkage mechanism (304) that links the upper crank arm (302) and the lower crank arm (303).

8. The grounding interlocking mechanism for a switchgear according to claim 1, characterized in that: The front door interlocking component (1) includes a lock plate (101) that moves up and down, a lock rod (102) that drives the lock plate (101), and a cam disc (103) that drives the lock rod (102). The rotating shaft of the cam disc (103) rotates coaxially with the connecting shaft (13).

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