An intelligent power grid high-voltage switch cabinet, a switch cabinet interlocking device and a safe operation method thereof

Abstract

The application relates to the technical field of switch cabinets, in particular to an intelligent power grid high-voltage switch cabinet, a switch cabinet interlocking device and a safe operation method thereof, a rotating sleeve is rotatably installed in a cabinet body, a supporting rod axially slides in the rotating sleeve, a limiting mechanism connected with a handcart is arranged on the supporting rod; an elastic pushing mechanism is arranged on the rotating sleeve and the supporting rod, a static contact is connected to the elastic pushing mechanism; a connecting and disconnecting mechanism is arranged on the rotating sleeve and connected with the elastic pushing mechanism, and the connecting and disconnecting mechanism comprises a moving contact matched with the static contact; the application can adjust the limiting state of the limiting assembly on the handcart through the cooperation of the connecting and disconnecting mechanism and the elastic pushing mechanism; when the moving contact and the static contact are connected, the position of the handcart is locked; when the moving contact and the static contact are separated and the handcart moves, the position of the moving contact is locked, so that the circuit breaker is in an open state when the handcart moves.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to a smart grid high-voltage switchgear, a switchgear interlocking device, and a safe operation method thereof. Background Technology

[0002] High-voltage switchgear in smart grids is a key piece of equipment in the power system, responsible for the distribution, control, and protection of electrical energy, and characterized by intelligence, automation, and high reliability. Advanced sensor technology is integrated into the high-voltage switchgear of smart grids, enabling real-time monitoring of the switchgear's insulation characteristics, conductive circuit performance, and mechanical properties. Among these, the interlocking between the position locking of the high-voltage switchgear's trolley (circuit breaker trolley) and the circuit breaker's status is a crucial mechanism ensuring the safety of remote operations. This interlocking is typically achieved through reliable mechanical or electrical interlocking methods.

[0003] However, regardless of whether it is a mechanical interlock or an electrical interlock, when the handcart moves to the test position or the working position, the electrical control circuit needs to be connected before the interlock that prevents the circuit breaker from closing can be unlocked. If the electrical control circuit misjudges due to strong electromagnetic interference or control power failure, it may cause the interlock to fail. Summary of the Invention

[0004] The purpose of this invention is to provide a smart grid high-voltage switchgear, a switchgear interlocking device, and a safe operation method thereof to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A smart grid high-voltage switchgear includes: The cabinet, and a support plate set inside the cabinet, with guide rails formed on the support plate, and a handcart slidably mounted on the guide rails; A rotating rod is rotatably mounted on the cabinet body. The rotating rod is equipped with a cabinet door for closing the cabinet body. The rotating rod is also equipped with a tilting locking component, which can perform closing or locking actions on the cabinet door according to the tilting angle of the cabinet door.

[0006] As a further embodiment of the present invention: the sway locking assembly includes a slide groove formed on the cabinet, the outer circumferential wall of the rotating rod is formed with a first spiral groove and an annular groove, the axial sliding of the rotating rod is provided with a sliding block that is slidably connected to the slide groove, and the inner wall of the sliding block is provided with a limiting block that is slidably engaged with the first spiral groove and the annular groove. It also includes a fixed ring disposed on the rotating rod, and a first spring is sleeved on the rotating rod, with the two ends of the first spring abutting against the sliding block and the fixed ring, respectively.

[0007] A switchgear interlocking device, comprising: A rotating sleeve is rotatably installed inside the cabinet. A support rod slides axially inside the rotating sleeve, and a limiting mechanism connected to the handcart is provided on the support rod. An elastic pushing mechanism is provided on the rotating sleeve and the support rod, and a stationary contact is connected to the elastic pushing mechanism; A disconnection mechanism is disposed on the rotating sleeve and connected to the elastic pushing mechanism. It includes a moving contact that cooperates with the stationary contact. The disconnection mechanism can control the moving contact to connect with the stationary contact and lock the position of the handcart through the elastic pushing mechanism and the limiting mechanism.

[0008] As a further embodiment of the present invention: the limiting mechanism includes a receiving plate disposed at the end of the support rod, and a limiting wheel that abuts against the side wall of the handcart is rotatably mounted on the receiving plate.

[0009] As a further embodiment of the present invention: the limiting mechanism further includes a first limiting groove, a second limiting groove, and a third limiting groove formed on the side wall of the handcart, wherein the first limiting groove, the second limiting groove, and the third limiting groove abut against the limiting wheel.

[0010] As a further embodiment of the present invention: the elastic pushing mechanism includes a guide column disposed in the cabinet body, a fixed plate connected to the stationary contact is disposed on the guide column, a sliding plate connected to the support rod is slidably disposed on the guide column along its axial direction, and a second spring is sleeved on the guide column, with the two ends of the second spring abutting against the sliding plate and the fixed plate respectively.

[0011] As a further embodiment of the present invention: the elastic pushing mechanism further includes a guide groove formed on the outer circumferential wall of the rotating sleeve, the rotating sleeve has a first guide plate that is slidably connected to the guide post along its axial direction, and the inner wall of the first guide plate is provided with a first limiting post that is slidably fitted with the guide groove and connected to the support rod.

[0012] As a further embodiment of the present invention: the disconnection mechanism includes a cylinder disposed on the fixed plate, and the guide column has a second guide plate that is slidably connected to the rotating sleeve along its axial direction. The second guide plate is connected to the telescopic end of the cylinder.

[0013] As a further embodiment of the present invention: the disconnection mechanism further includes a second spiral groove formed on the outer wall of the circumference of the rotating sleeve, and a second limiting post is provided on the inner wall of the second guide plate to slide and engage with the second spiral groove.

[0014] A safe operation method for a switchgear interlocking device includes the following steps: Step 1: When the handcart is in the working or testing position, the disconnection mechanism controls the moving contact to contact the stationary contact, and locks the position of the support rod through the elastic push mechanism, so as to lock the position of the handcart through the limit mechanism; Step 2: When the disconnection mechanism controls the moving contact to separate from the stationary contact, the elastic push mechanism no longer locks the position of the support rod; Step 3: Adjust the position of the handcart, and control the movement of the limiting mechanism when the handcart moves, and limit the angle of the rotating sleeve through the elastic pushing mechanism, so as to lock the position of the moving contact through the disconnection mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This application can provide closing force and locking force to the cabinet door according to the required usage state of the cabinet door, so as to ensure that it will not affect the normal use of the switch cabinet. Through the cooperation of the limit block with the first spiral groove and the annular groove, a certain closing force can always be provided to the cabinet door when the cabinet door is not opened, so as to avoid the cabinet door being in the open state due to accidental operation. When the cabinet door needs to be opened, a certain locking force can be provided to the cabinet door when the cabinet door is rotated to a specified angle range, so as to prevent the cabinet door from accidentally resetting when the handcart is moving, causing interference and collision with the handcart.

[0016] 2. This application can achieve the following by locking the positions of the limit wheel and the moving contact: when the circuit breaker is turned on, the trolley is in the working or test position; when the trolley moves, the circuit breaker is in the open state, thus ensuring the safe use of the switchgear. Specifically, when the position of the trolley needs to be adjusted, the disconnecting mechanism controls the moving contact to separate from the stationary contact and drives the rotating sleeve to rotate. This allows the support rod to be no longer locked through the elastic push mechanism. When the trolley moves, it drives the limit mechanism to move, which in turn drives the elastic push mechanism through the support rod, thereby locking the angle of the rotating sleeve. This prevents the disconnecting mechanism from controlling the movement of the moving contact, ensuring that the circuit breaker is always in the open state.

[0017] When the second spring controls the limit wheel to enter the first or second limit groove, the limit wheel can provide a certain amount of assistance to the handcart and guide the handcart to move to the corresponding working or test position. In this way, it can not only provide locking force to the handcart later, but also position the handcart to prevent the position from deviating when the handcart switches working states.

[0018] By cooperating with the guide groove and the first limiting post, and with the second limiting post and the second spiral groove, when the handcart is in the working or testing position, if the circuit breaker is in the closed state, the position of the limiting wheel is locked, thereby locking the position of the handcart. If the circuit breaker is in the open state, the position of the handcart is no longer locked. When the circuit breaker is open and the handcart is adjusting its position, the angle of the rotating sleeve can be locked, thereby locking the position of the moving contact, ensuring that the circuit breaker is always in the open state, so as to ensure the safe use of the switchgear. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0020] Figure 2 This is a structural schematic diagram of the cabinet door in one embodiment of a smart grid high-voltage switchgear and switchgear interlocking device, showing the cabinet door in the open state.

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0022] Figure 4 This is an exploded structural diagram of the yaw locking component in one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0023] Figure 5 This is a schematic diagram of the internal structure of a cabinet in one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0024] Figure 6 This is a schematic diagram illustrating the connection relationship between the limit mechanism, handcart, rotating sleeve, support rod, partial disconnection mechanism, and partial elastic push mechanism in one embodiment of a smart grid high-voltage switchgear and switchgear interlocking device.

[0025] Figure 7 for Figure 6 Another structural diagram from a different angle.

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B.

[0027] Figure 9 This is a schematic diagram of the handcart and part of the limit mechanism in one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0028] Figure 10 This is a schematic diagram showing the connection relationship between a portion of the elastic push mechanism, a portion of the limit mechanism, and a portion of the disconnection mechanism in one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0029] Figure 11 for Figure 10 Another structural diagram from a different angle.

[0030] Figure 12 This is an exploded structural diagram of a portion of the elastic push mechanism, a portion of the disconnection mechanism, a rotating sleeve, and a support rod in one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0031] Figure 13 This is an exploded structural diagram of part of the elastic push mechanism and part of the disconnection mechanism in one embodiment of a high-voltage switchgear and switchgear interlocking device for a smart grid.

[0032] In the diagram: 1. Cabinet body; 101. Slide groove; 2. Rotating rod; 201. First spiral groove; 202. Annular groove; 203. Fixing ring; 3. Cabinet door; 4. Sliding block; 401. Limiting block; 5. First spring; 6. Support plate; 601. Guide rail; 7. Handcart; 701. First limiting groove; 702. Triangular block; 703. Second limiting groove; 704. Third limiting groove; 8. Rotating sleeve; 80 1. Circumferential groove; 802. Straight groove; 803. Second spiral groove; 9. Support rod; 10. Receiving plate; 11. Limiting wheel; 12. Guide post; 13. First guide plate; 1301. First limiting post; 14. Second guide plate; 1401. Second limiting post; 15. Sliding plate; 16. Fixed plate; 17. Second spring; 18. Cylinder; 19. Stationary contact; 20. Moving contact; 21. Controller. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0035] Please see Figures 1-4 In this embodiment of the invention, a smart grid high-voltage switchgear includes: Cabinet 1, and support plate 6 set inside cabinet 1, guide rail 601 formed on support plate 6, and handcart 7 slidably installed on guide rail 601; A rotating rod 2 is rotatably mounted on the cabinet body 1. The rotating rod 2 is equipped with a cabinet door 3 for closing the cabinet body 1. The rotating rod 2 is also equipped with a tilting locking component, which can perform closing or locking actions on the cabinet door 3 according to the tilting angle of the cabinet door 3.

[0036] Please see Figure 3 , Figure 4 The sway locking assembly includes a slide groove 101 formed on the cabinet 1, the outer circumferential wall of the rotating rod 2 is formed with a first spiral groove 201 and an annular groove 202, the axial sliding of the rotating rod 2 is provided with a sliding block 4 that is slidably connected to the slide groove 101, and the inner wall of the sliding block 4 is provided with a limiting block 401 that is slidably fitted with the first spiral groove 201 and the annular groove 202; It also includes a fixing ring 203 disposed on the rotating rod 2, and a first spring 5 is sleeved on the rotating rod 2, with the two ends of the first spring 5 abutting against the sliding block 4 and the fixing ring 203 respectively.

[0037] In detail, in the initial state, the sliding block 4 is located at the end of the stroke of the slide groove 101 away from the fixed ring 203, so that the distance between the sliding block 4 and the fixed ring 203 is maximized, so that the limiting block 401 is located at the end of the stroke of the first spiral groove 201 away from the annular groove 202. At this time, the cabinet door 3 and the cabinet body 1 are in a close fit and the cabinet body 1 is closed. The extension of the first spring 5 in its natural state is greater than the maximum distance between the sliding block 4 and the fixed ring 203. Therefore, the first spring 5 is in a pre-compressed state and always provides the sliding block 4 with a pushing force in the direction away from the fixed ring 203, so that the cabinet door 3 has a tendency to move towards the cabinet body 1. With the cooperation of the limiting block 401 and the first spiral groove 201, the cabinet door 3 can always be closed when it is not subjected to external force. When the handcart 7 needs to be inspected or operated, the cabinet door 3 needs to be opened. To do this, the cabinet door 3 can be manually controlled to swing away from the cabinet body 1, thereby driving the rotating rod 2 to rotate. The rotating rod 2 will drive the first spiral groove 201 and the annular groove 202 to move, so that the limiting block 401 slides relative to the rotating rod 2 along the first spiral groove 201. Under the action of the limiting block 401 and the first spiral groove 201, the sliding block 4 slides along the sliding groove 101 and moves towards the direction of the fixed ring 203 to compress the first spring 5. Since the first spring 5 is in a continuously compressed state, the opening resistance of the cabinet door 3 will continue to increase and will always be subject to a restoring force. When the opening angle of the cabinet door 3 reaches a certain value, the limiting block 401 disengages from the first spiral groove 201 and enters the annular groove 202. Under the action of the annular groove 202 and the limiting block 401, the position of the sliding block 4 is restricted, so that the first spring 5 no longer provides a restoring force to the cabinet door 3. Under the action of the limiting block 401 and the annular groove 202, a certain locking force is provided to the cabinet door 3, thereby locking the position of the cabinet door 3. At this time, the handcart 7 can be controlled to slide along the guide rail 601 and move to the desired position. Preferably, by cooperating with the limiting block 401, the first spiral groove 201 and the annular groove 202, a certain closing force can always be provided to the cabinet door 3 when it is not opened, so as to prevent the cabinet door 3 from being in the open state due to accidental operation. When it is necessary to open the cabinet door 3, a certain locking force can be provided to the cabinet door 3 when it is rotated to a specified angle range, so as to prevent the cabinet door 3 from accidentally resetting when the handcart 7 is moving, which would cause interference and collision with the handcart 7.

[0038] Please see Figures 5-13 A switchgear interlocking device, applied to the aforementioned smart grid high-voltage switchgear, comprising: Rotary sleeve 8 is rotatably installed inside cabinet 1. A support rod 9 slides axially inside the rotating sleeve 8. A limiting mechanism connected to the handcart 7 is provided on the support rod 9. An elastic pushing mechanism is provided on the rotating sleeve 8 and the support rod 9, and a stationary contact 19 is connected to the elastic pushing mechanism; The disconnection mechanism is disposed on the rotating sleeve 8 and connected to the elastic pushing mechanism. It includes a moving contact 20 that cooperates with the stationary contact 19. The disconnection mechanism can control the moving contact 20 to connect with the stationary contact 19, and lock the position of the handcart 7 through the elastic pushing mechanism and the limiting mechanism.

[0039] Specifically, the trolley 7 has three positions: working position, test position, and maintenance position. When the trolley 7 is in the working position or test position, the circuit breaker can freely open or close. When the circuit breaker is closed, the position of the trolley 7 needs to be locked. When adjusting the position of the trolley 7, that is, when the trolley 7 is in a moving state, the circuit breaker needs to remain in the open state. In the initial state, the trolley 7 is in the working position. Under the action of the disconnecting mechanism, the moving contact 20 is connected to the stationary contact 19, thereby locking the position of the support rod 9 through the elastic pushing mechanism. The position of the handcart 7 is locked by the limiting mechanism. When the position of the handcart 7 needs to be adjusted, the disconnecting mechanism controls the moving contact 20 to separate from the stationary contact 19 and drives the rotating sleeve 8 to rotate. The position of the support rod 9 is no longer locked by the elastic pushing mechanism. When the handcart 7 moves, it drives the limiting mechanism to move, which in turn drives the elastic pushing mechanism to move through the support rod 9, thereby locking the angle of the rotating sleeve 8. This prevents the disconnecting mechanism from controlling the movement of the moving contact 20, ensuring that the circuit breaker is always in the open state and guaranteeing the safe use of the switchgear.

[0040] Please see Figures 4-7 , Figures 9-12 The limiting mechanism includes a receiving plate 10 disposed at the end of the support rod 9. A limiting wheel 11 that abuts against the side wall of the handcart 7 is rotatably mounted on the receiving plate 10. The limiting mechanism also includes a first limiting groove 701, a second limiting groove 703, and a third limiting groove 704 formed on the side wall of the handcart 7. The first limiting groove 701, the second limiting groove 703, and the third limiting groove 704 abut against the limiting wheel 11.

[0041] It should be noted that the first limiting groove 701 is set in the shape of a right trapezoid, the second limiting groove 703 is set in the shape of an equilateral trapezoid, and the third limiting groove 704 is set in a triangular inclined shape. Triangular blocks 702 are set on both sides of the second limiting groove 703. The first limiting groove 701 corresponds to the working position, the second limiting groove 703 corresponds to the test position, and the third limiting groove 704 corresponds to the maintenance position. The opening depth of the first limiting groove 701 and the second limiting groove 703 is the same. In the initial state, the limiting wheel 11 is located within the first limiting groove 701, and is in contact with both the right-angled side and the hypotenuse of the first limiting groove 701. Under the action of the first limiting groove 701, the handcart 7 extends into the cabinet 1 to the end of its stroke. When it is necessary to move the handcart 7 to the test position, the handcart 7 can be controlled to slide along the guide rail 601. Under the action of the hypotenuse of the first limiting groove 701, the limiting wheel 11 disengages from the first limiting groove 701 and slides along the side of the handcart 7. The limiting wheel 11 also drives the support rod 9 to move towards the rotating sleeve 8 through the receiving plate 10. When the limiting wheel 11 abuts against the triangular block 702, the support rod 9 is controlled to continue moving towards the rotating sleeve 8, under the elastic push mechanism. Under the action of the mechanism, the resistance to the movement of the handcart 7 increases, making it easier for the staff to know the position of the handcart 7. When the limit wheel 11 passes the triangular block 702, under the action of the elastic pushing mechanism, the limit wheel 11 is controlled by the support rod 9 to enter the second limit groove 703. At this time, the limit wheel 11 will abut against the two inclined sides of the second limit groove 703, thereby locking the position of the handcart 7. Similarly, when it is necessary to control the handcart 7 to move to the maintenance position, continue to pull the handcart 7 to move it, so that the limit wheel 11 disengages from the second limit groove 703 and moves to the position that engages with the third limit groove 704, until the limit wheel 11 separates from the handcart 7. At this time, the handcart 7 can be taken out for maintenance using a trolley. After maintenance is completed, the control handcart 7 re-enters the cabinet 1, and under the action of the inclined surface of the third limit groove 704, the control limit wheel 11 abuts against the side of the handcart 7 again, thereby ensuring that after maintenance is completed, the limit wheel 11 can still cooperate with the first limit groove 701 and the second limit groove 703 to lock the handcart 7.

[0042] Please see Figures 6-8 , Figures 10-13 The elastic pushing mechanism includes a guide post 12 disposed within the cabinet 1, a fixed plate 16 connected to the stationary contact 19 disposed on the guide post 12, a sliding plate 15 connected to the support rod 9 slidably on the guide post 12, a second spring 17 sleeved on the guide post 12, the two ends of the second spring 17 respectively abutting against the sliding plate 15 and the fixed plate 16, the elastic pushing mechanism also includes a guide groove formed on the outer circumferential wall of the rotating sleeve 8, a first guide plate 13 slidably connected to the guide post 12 slidably on the axial side of the rotating sleeve 8, and a first limiting post 1301 slidably fitted into the guide groove and connected to the support rod 9 disposed on the inner wall of the first guide plate 13.

[0043] Please see Figures 6-8 , Figures 10-13The disconnection mechanism includes a cylinder 18 disposed on the fixed plate 16, and a second guide plate 14 slidably connected to the rotating sleeve 8 along the axial direction of the guide post 12. The second guide plate 14 is connected to the telescopic end of the cylinder 18. The disconnection mechanism also includes a second spiral groove 803 formed on the outer circumference of the rotating sleeve 8, and a second limiting post 1401 slidably fitted into the second spiral groove 803 on the inner wall of the second guide plate 14.

[0044] Please see Figure 11 , Figure 12 Furthermore, the guide groove can be divided into two sections: a second spiral groove 803 and an circumferential groove 801. The circumferential groove 801 has the same opening angle in the circumferential direction as the second spiral groove 803. In the initial state, the limiting wheel 11 is located in the first limiting groove 701. The elongation of the second spring 17 in its natural state is greater than the distance between the fixed plate 16 and the sliding plate 15. Therefore, the second spring 17 is in a pre-compressed state and always provides a thrust to the support rod 9 in the direction away from the rotating sleeve 8 through the sliding plate 15. Under the action of the cylinder 18, the distance between the second guide plate 14 and the fixed plate 16 is minimized, so that the second limiting wheel 11 is in the same position as the first limiting groove 701. Position post 1401 is located at the end of the stroke of the second spiral groove 803 facing the straight groove 801. At this time, the moving contact 20 and the stationary contact 19 are in contact, so that the circuit breaker can be controlled to be in the connected state by the controller 21. Under the action of the second limit post 1401 and the second spiral groove 803, the first limit post 1301 is located at the end of the stroke of the circumferential groove 802 away from the straight groove 801. Under the action of the first limit post 1301 and the circumferential groove 802, the position of the support rod 9 is locked, thereby ensuring that the position of the limit wheel 11 will not change. Under the action of the limit wheel 11 and the first limit groove 701, the position of the handcart 7 is locked. When the handcart 7 needs to be adjusted to the test position, the circuit breaker needs to be disconnected. In this case, the cylinder 18 works and pushes the second guide plate 14 to move away from the fixed plate 16, so that the moving contact 20 separates from the stationary contact 19, so that the circuit breaker can be disconnected by the controller 21. At the same time, the second guide plate 14 will also drive the second limit post 1401 to slide along the second spiral groove 803, so that the rotating sleeve 8 rotates, thereby driving the circumferential groove 801 to move. The first limit post 1301 will slide along the circumferential groove 801 relative to the rotating sleeve 8. When the second limit post 1401 moves to the end of the stroke of the second spiral groove 803, the cylinder 18 stops working, the rotating sleeve 8 reaches the maximum rotation angle, and the first limit post 1301 just disengages from the circumferential groove 801 and enters the straight groove 802. At this time, the position of the support rod 9 is no longer locked, allowing the limit wheel 11 to move freely. In this way, the handcart 7 can be pulled away from the cabinet 1. Under the action of the inclined surface of the first limit groove 701, the limit wheel 11 is disengaged from the first limit groove 701 and abuts against the side of the handcart 7. The limit wheel 11 will also drive the support rod 9 to move into the rotating sleeve 8, causing the first limit post 1301 to slide along the straight groove 802. Under the action of the first limit post 1301 and the straight groove 802, the angle of the rotating sleeve 8 is locked, thereby ensuring that the position of the moving contact 20 will not change when the handcart 7 moves. The support rod 9 will also drive the sliding plate 15 to move and compress the second spring 17. When the limiting wheel 11 moves to the position where it engages with the second limiting groove 703, the second spring 17 is released elastically and pushes the support rod 9 through the sliding plate 15, thereby controlling the limiting wheel 11 to enter the second limiting groove 703. Under the action of the limiting wheel 11, it can provide a certain amount of assistance to the handcart 7, allowing the handcart 7 to move smoothly to the designated position. When the two inclined surfaces of the limiting wheel 11 and the second limiting groove 703 abut against each other, it indicates that the handcart 7 has successfully moved to the test position. The limiting wheel 11 moves to the end of its stroke. During this process, the limiting wheel 11 can both lock and position the handcart 7. To ensure that there is no deviation when the handcart 7 moves to the test position, at this time, the first limiting post 1301 just moves to the connection position of the straight groove 802 and the circumferential groove 801, so that the angle of the rotating sleeve 8 is no longer locked. In this regard, the cylinder 18 can control the moving contact 20 and the stationary contact 19 to be in contact or kept separate through the second guide plate 14. When the moving contact 20 approaches the stationary contact 19, the second limiting post 1401 will control the rotating sleeve 8 to rotate through the second spiral groove 803, so that the first limiting post 1301 enters the circumferential groove 801 again to lock the position of the limiting wheel 11 again. When the handcart 7 needs to be inspected, the moving contact 20 can be moved again to the end of its stroke away from the stationary contact 19. At the same time, the handcart 7 is pulled, causing the limit wheel 11 to disengage from the second limit groove 703. When the limit wheel 11 moves to the position that engages with the third limit groove 704, the second spring 17 is released elastically, causing the limit wheel 11 to abut against the inclined surface of the second limit groove 704 until the limit wheel 11 separates from the handcart 7. The support rod 9 will then move to the end of its stroke away from the rotating sleeve 8, so that the first limit post 1301 is located at the end of its stroke on the side of the straight groove 802 away from the second spiral groove 803. Under the action of the first limit post 1301 and the straight groove 802, the position of the rotating sleeve 8 is locked to ensure that the circuit breaker is always in the open state when the handcart 7 is removed from the cabinet 1 for inspection.

[0045] Preferably, by cooperating with the guide groove and the first limiting post 1301 and the second limiting post 1401 and the second spiral groove 803, when the handcart 7 is in the working or test position, if the circuit breaker is in the on state, the position of the limiting wheel 11 is locked, thereby locking the position of the handcart 7. If the circuit breaker is in the off state, the position of the handcart 7 is no longer locked. When the circuit breaker is off and the handcart 7 is adjusting its position, the angle of the rotating sleeve 8 can be locked, thereby locking the position of the moving contact 20, ensuring that the circuit breaker is always in the off state, so as to ensure the safe use of the switchgear.

[0046] A safe operation method for a switchgear interlocking device includes the following steps: Step 1: When the handcart is in the working or test position, the disconnection mechanism controls the moving contact 20 to contact the stationary contact 19, and locks the position of the support rod 9 through the elastic pushing mechanism, so as to lock the position of the handcart 7 through the limiting mechanism; Step 2: When the disconnection mechanism controls the moving contact 20 to separate from the stationary contact 19, the elastic push mechanism no longer locks the position of the support rod 9; Step 3: Adjust the position of the handcart 7, and control the movement of the limiting mechanism when the handcart 7 moves, and limit the angle of the rotating sleeve 8 through the elastic pushing mechanism, so as to lock the position of the moving contact 20 through the disconnection mechanism.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smart grid high-voltage switchgear, characterized in that, include: The cabinet, and a support plate set inside the cabinet, with guide rails formed on the support plate, and a handcart slidably mounted on the guide rails; A rotating rod is rotatably mounted on the cabinet body. The rotating rod is equipped with a cabinet door for closing the cabinet body. The rotating rod is also equipped with a tilting locking component, which can perform a closing or locking action on the cabinet door according to the tilting angle of the cabinet door. The sway locking assembly includes a slide groove formed on the cabinet body, a first spiral groove and an annular groove formed on the outer circumference of the rotating rod, a sliding block that is slidably connected to the slide groove on the axial side of the rotating rod, and a limiting block that is slidably engaged with the first spiral groove and the annular groove on the inner wall of the sliding block. It also includes a fixing ring disposed on the rotating rod, and a first spring is sleeved on the rotating rod, with the two ends of the first spring abutting against the sliding block and the fixing ring respectively; In the initial state, the sliding block is located at the end of the stroke on the side of the slide groove away from the fixed ring, the distance between the sliding block and the fixed ring is the largest, the limiting block is located at the end of the stroke on the side of the first spiral groove away from the annular groove, the cabinet door and the cabinet body are in a close fit and the cabinet body is closed, the first spring is in a pre-compressed state and always provides the sliding block with a pushing force in the direction away from the fixed ring, so that the cabinet door has a tendency to move towards the cabinet body. When the cabinet door needs to be opened for maintenance, the door is manually tilted away from the cabinet body, which drives the rotating rod to rotate. The rotating rod will drive the first spiral groove and the annular groove to move, causing the limiting block to slide along the first spiral groove relative to the rotating rod. Under the action of the limiting block and the first spiral groove, the sliding block slides along the groove and moves towards the fixed ring to compress the first spring. The opening resistance of the cabinet door will continue to increase and will always be subject to a restoring force. When the cabinet door opens to the limit block disengages from the first spiral groove and enters the annular groove, the position of the sliding block is restricted by the action of the annular groove and the limit block, so that the first spring no longer provides the cabinet door reset force and provides the cabinet door with locking force. By cooperating with the limiting block, the first spiral groove, and the annular groove, a closing force can always be provided to the cabinet door when it is not open; when the cabinet door is opened and rotated to a specified angle range, a locking force is provided to the cabinet door.

2. A switchgear interlocking device, applied to the smart grid high-voltage switchgear as described in claim 1, characterized in that, include: A rotating sleeve is rotatably installed inside the cabinet. A support rod slides axially inside the rotating sleeve, and a limiting mechanism connected to the handcart is provided on the support rod. An elastic pushing mechanism is provided on the rotating sleeve and the support rod, and a stationary contact is connected to the elastic pushing mechanism; A disconnection mechanism is disposed on the rotating sleeve and connected to the elastic pushing mechanism. It includes a moving contact that cooperates with the stationary contact. The disconnection mechanism can control the moving contact to connect with the stationary contact and lock the position of the handcart through the elastic pushing mechanism and the limiting mechanism.

3. The switchgear interlocking device according to claim 2, characterized in that, The limiting mechanism includes a receiving plate disposed at the end of the support rod, and a limiting wheel that abuts against the side wall of the handcart is rotatably mounted on the receiving plate.

4. The switchgear interlocking device according to claim 3, characterized in that, The limiting mechanism further includes a first limiting groove, a second limiting groove, and a third limiting groove formed on the side wall of the handcart, wherein the first limiting groove, the second limiting groove, and the third limiting groove abut against the limiting wheel.

5. A switchgear interlocking device according to claim 2, characterized in that, The elastic pushing mechanism includes a guide column disposed in the cabinet body, a fixed plate connected to the stationary contact on the guide column, a sliding plate connected to the support rod sliding axially on the guide column, and a second spring sleeved on the guide column, with the two ends of the second spring abutting against the sliding plate and the fixed plate respectively.

6. A switchgear interlocking device according to claim 5, characterized in that, The elastic pushing mechanism further includes a guide groove formed on the outer circumference of the rotating sleeve, and the rotating sleeve has a first guide plate that is slidably connected to the guide post along its axial direction. The inner wall of the first guide plate is provided with a first limiting post that is slidably fitted with the guide groove and connected to the support rod.

7. A switchgear interlocking device according to claim 5, characterized in that, The disconnection mechanism includes a cylinder mounted on the fixed plate, and a second guide plate that is slidably connected to the rotating sleeve along the axial direction of the guide column. The second guide plate is connected to the telescopic end of the cylinder.

8. A switchgear interlocking device according to claim 7, characterized in that, The disconnection mechanism further includes a second spiral groove formed on the outer circumference of the rotating sleeve, and a second limiting post is provided on the inner wall of the second guide plate to slide and engage with the second spiral groove.

9. A safe operation method for a switchgear interlocking device, employing the switchgear interlocking device as described in claim 2, characterized in that, When the handcart is in the working or testing position, the disconnection mechanism controls the moving contact to contact the stationary contact, and locks the position of the support rod through the elastic push mechanism, thereby locking the position of the handcart through the limit mechanism; When the disconnecting mechanism controls the moving contact to separate from the stationary contact, the elastic push mechanism no longer locks the position of the support rod; The position of the handcart is adjustable, and when the handcart moves, the movement of the limiting mechanism is controlled, and the angle of the rotating sleeve is limited by the elastic pushing mechanism, so as to lock the position of the moving contact through the disconnection mechanism.

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