Intelligent power grid high-voltage switch cabinet, switch cabinet interlocking device and safe operation method thereof

Abstract

The invention 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.The intelligent power grid high-voltage switch cabinet is characterized in that a rotating sleeve is rotationally installed in a cabinet body, a supporting rod axially slides in the rotating sleeve, and a limiting mechanism connected with a handcart is arranged on the supporting rod; the elastic pushing mechanism is arranged on the rotating sleeve and the supporting rod, and the elastic pushing mechanism is connected with a static contact; the connecting and disconnecting mechanism is arranged on the rotating sleeve, connected with the elastic pushing mechanism and comprises a moving contact matched with the static contact, the limiting state of the limiting assembly on the handcart can be adjusted through 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, and the handcart is prevented from being damaged. And when the moving contact is separated from the static contact and the handcart moves, the position of the moving contact is locked so as to ensure that the circuit breaker is in a disconnected state when the handcart moves.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and in particular to a smart grid high-voltage switch cabinet, a switch cabinet interlocking device and a safe operation method thereof. Background Art

[0002] High-voltage switchgear in smart grids is a key component of the power system, responsible for the distribution, control, and protection of electrical energy. It features intelligence, automation, and high reliability. Advanced sensor technology is integrated into smart grid high-voltage switchgear to monitor its insulation, conductive circuit, and mechanical properties in real time. The interlocking mechanism between the switchgear's trolley (circuit breaker trolley) and the circuit breaker status is a key mechanism for ensuring safe remote operation. This interlocking mechanism is typically implemented using reliable mechanical or electrical interlocking mechanisms.

[0003] However, whether it is a mechanical interlock or an electrical interlock, when the trolley moves to the test position or the working position, the electrical control circuit needs to be connected, and the interlock that prevents the circuit breaker from closing can be unlocked. If the electrical control circuit is interfered with by a strong electromagnetic field or a control power failure, the electrical control circuit may misjudge, which may cause the interlock to fail. Summary of the Invention

[0004] The object of the present invention is to provide a smart grid high-voltage switchgear, a switchgear interlocking device and a safe operation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A smart grid high-voltage switchgear, comprising: A cabinet body, and a support plate arranged in the cabinet body, wherein a guide rail is formed on the support plate, and a trolley is slidably mounted on the guide rail; A rotating rod is rotatably mounted on the cabinet body, and a cabinet door for closing the cabinet body is provided on the rotating rod. A swing locking assembly is provided on the rotating rod, and the swing locking assembly can close or lock the cabinet door according to the swing angle of the cabinet door.

[0006] As a further solution of the present invention, the yaw locking assembly includes a slide groove provided on the cabinet body, a first spiral groove and an annular groove are formed on the circumferential outer wall of the rotating rod, a sliding block slidably connected to the slide groove is provided for axial sliding of the rotating rod, and a limit block slidably engaged with the first spiral groove and the annular groove is provided on the inner wall of the sliding block; It also includes a fixing ring arranged on the rotating rod. A first spring is sleeved on the rotating rod. Two ends of the first spring are respectively in contact with the sliding block and the fixing ring.

[0007] A switch cabinet interlocking device, comprising: A rotating sleeve is rotatably mounted in the cabinet, a support rod is axially slidable in the rotating sleeve, and a limiting mechanism connected to the trolley is provided on the support rod; an elastic pushing mechanism, provided on the rotating sleeve and the supporting rod, and connected to a static contact; The disconnecting mechanism is arranged on the rotating sleeve and connected to the elastic pushing mechanism, and includes a moving contact cooperating with the static contact. The disconnecting mechanism can control the connection between the moving contact and the static contact, and lock the position of the trolley through the elastic pushing mechanism and the limiting mechanism.

[0008] As a further solution of the present invention: the limiting mechanism includes a receiving plate provided at the end of the support rod, and a limiting wheel abutting against the side wall of the trolley is rotatably mounted on the receiving plate.

[0009] As a further solution of the present invention: the limiting mechanism also includes a first limiting groove, a second limiting groove, and a third limiting groove formed on the side wall of the trolley, and the first limiting groove, the second limiting groove, and the third limiting groove are in contact with the limiting wheel.

[0010] As a further solution of the present invention: the elastic pushing mechanism includes a guide column arranged in the cabinet body, the guide column is provided with a fixed plate connected to the static contact, the axial sliding of the guide column is provided with a sliding plate connected to the support rod, and the guide column is sleeved with a second spring, and the two ends of the second spring are respectively abutted against the sliding plate and the fixed plate.

[0011] As a further solution of the present invention: the elastic pushing mechanism also includes a guide groove formed on the outer wall of the circumference of the rotating sleeve, the axial sliding of the rotating sleeve has a first guide plate slidably connected to the guide column, and the inner wall of the first guide plate is provided with a first limiting column slidably engaged with the guide groove and connected to the support rod.

[0012] As a further solution of the present invention: the connecting and disconnecting mechanism includes a cylinder arranged on the fixed plate, the axial sliding of the guide column has a second guide plate slidably connected to the rotating sleeve, and the second guide plate is connected to the telescopic end of the cylinder.

[0013] As a further solution of the present invention: the connecting and disconnecting mechanism further includes a second spiral groove formed on the circumferential outer wall of the rotating sleeve, and the inner wall of the second guide plate is provided with a second limiting column slidably engaged with the second spiral groove.

[0014] A method for safely operating a switch cabinet interlocking device comprises the following steps: Step 1: When the trolley is in the working position or the test position, the disconnecting mechanism controls the moving contact to contact the static contact, and locks the position of the support rod through the elastic pushing mechanism, so as to lock the position of the trolley through the limit mechanism; Step 2: When the disconnecting mechanism controls the moving contact to separate from the static contact, the elastic pushing mechanism no longer locks the position of the support rod; Step 3: The position of the trolley can be adjusted, and when the trolley moves, the movement of the limit assembly is controlled, and the angle of the rotating sleeve is limited by the elastic pushing mechanism to lock the position of the moving contact through the disconnecting mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application can provide closing force and locking force to the cabinet door according to the required usage status of the cabinet door 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 to avoid the cabinet door being in an open state due to misoperation. 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 to prevent the cabinet door from accidentally resetting when the trolley is moving, resulting in interference and collision with the trolley.

[0016] 2. The present application can lock the position of the limit wheel and the moving contact to achieve that when the circuit breaker is connected, the trolley is in the working position or the test position, and when the trolley moves, the circuit breaker is in the disconnected state, so as to ensure the safe use of the switch cabinet. Specifically, when the position of the trolley needs to be adjusted, at this time, the disconnecting mechanism controls the separation of the moving contact and the static contact, and drives the rotating sleeve to rotate, so that the position of the support rod is no longer locked through the elastic pushing mechanism. At this time, when the trolley moves, it drives the limit mechanism to move, so as to drive the elastic pushing mechanism to move through the support rod, thereby locking the angle of the rotating sleeve, so that the disconnecting mechanism cannot control the movement of the moving contact, thereby ensuring that the circuit breaker is always in the disconnected state.

[0017] When the second spring controls the limiting wheel to enter the first limiting groove or the second limiting groove, the limiting wheel can provide a certain amount of assistance to the trolley and guide the trolley to move to the corresponding working position or test position. In this way, it can provide the trolley with locking force in the future and position the trolley to prevent the position deviation when the trolley switches the working state.

[0018] Through the cooperation between the guide groove and the first limiting column and the second limiting column and the second spiral groove, when the trolley is in the working or test position, if the circuit breaker is in the on state, the position of the limiting wheel is locked, thereby locking the position of the trolley; if the circuit breaker is in the off state, the position of the trolley is no longer locked; when the circuit breaker is disconnected and the position of the trolley is adjusted, 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 off state, thereby ensuring the safe use of the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The diagram is a structural diagram of an embodiment of a smart grid high-voltage switchgear and a switchgear interlocking device.

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

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

[0022] Figure 4 This is a schematic diagram of the exploded structure of a yaw locking assembly in one embodiment of a smart grid high-voltage switchgear and switchgear interlocking device.

[0023] Figure 5 This is a schematic diagram of the structure inside the cabinet body of an embodiment of a smart grid high-voltage switchgear and switchgear interlocking device.

[0024] Figure 6 This is a schematic diagram of the connection relationship between the limit mechanism, trolley, rotating sleeve, support rod, part of the connecting and disconnecting mechanism, and part of the elastic pushing mechanism in one embodiment of the smart grid high-voltage switchgear and switchgear interlocking device.

[0025] Figure 7 for Figure 6 Schematic diagram of the structure from another angle.

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

[0027] Figure 9 This is a structural diagram of a trolley and some limiting components in an embodiment of a smart grid high-voltage switchgear and switchgear interlocking device.

[0028] Figure 10 This is a schematic diagram of the connection relationship between part of the elastic pushing mechanism, part of the limiting mechanism, and part of the disconnecting mechanism in an embodiment of a smart grid high-voltage switchgear and a switchgear interlocking device.

[0029] Figure 11 for Figure 10 Schematic diagram of the structure from another angle.

[0030] Figure 12 This is a schematic diagram of the exploded structure of part of the elastic pushing mechanism, part of the disconnecting mechanism, the rotating sleeve, and the support rod in one embodiment of the smart grid high-voltage switchgear and switchgear interlocking device.

[0031] Figure 13 This is a schematic diagram of the exploded structure of part of the elastic pushing mechanism and part of the disconnecting mechanism in one embodiment of a smart grid high-voltage switchgear and switchgear interlocking device.

[0032] In the figure: 1. Cabinet; 101. Slide; 2. Rotating rod; 201. First spiral groove; 202. Annular groove; 203. Fixed ring; 3. Cabinet door; 4. Sliding block; 401. Limit block; 5. First spring; 6. Support plate; 601. Guide rail; 7. Cart; 701. First limit groove; 702. Triangular block; 703. Second limit groove; 704. Third limit groove; 8. Rotating sleeve; 80 1. Annular groove; 802. Straight groove; 803. Second spiral groove; 9. Support rod; 10. Attachment plate; 11. Limiting wheel; 12. Guide column; 13. First guide plate; 1301. First limiting column; 14. Second guide plate; 1401. Second limiting column; 15. Sliding plate; 16. Fixed plate; 17. Second spring; 18. Cylinder; 19. Static contact; 20. Moving contact; 21. Controller. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] See also Figures 1 to 4 In an embodiment of the present invention, a smart grid high-voltage switchgear includes: A cabinet body 1, and a support plate 6 disposed in the cabinet body 1, wherein a guide rail 601 is formed on the support plate 6, and a trolley 7 is slidably mounted on the guide rail 601; The rotating rod 2 is rotatably mounted on the cabinet body 1. The rotating rod 2 is provided with a cabinet door 3 for closing the cabinet body 1. The rotating rod 2 is provided with a swing locking assembly. The swing locking assembly can close or lock the cabinet door 3 according to the swing angle of the cabinet door 3.

[0036] See also Figure 3 、 Figure 4 The yaw locking assembly includes a slide groove 101 provided on the cabinet body 1, a first spiral groove 201 and an annular groove 202 are formed on the circumferential outer wall of the rotating rod 2, and a sliding block 4 slidably connected to the slide groove 101 is provided on the axial sliding of the rotating rod 2, and a limit block 401 slidably engaged with the first spiral groove 201 and the annular groove 202 is provided on the inner wall of the sliding block 4; It also includes a fixing ring 203 provided on the rotating rod 2 . A first spring 5 is sleeved on the rotating rod 2 . Two ends of the first spring 5 are respectively in contact with the sliding block 4 and the fixing ring 203 .

[0037] Specifically, in the initial state, the sliding block 4 is located at the end of the travel of the sliding groove 101 away from the fixing ring 203, so that the distance between the sliding block 4 and the fixing ring 203 is maximized, so that the limit block 401 is located at the end of the travel 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 fit state, and the cabinet body 1 is closed. The elongation of the first spring 5 in the natural state is greater than the maximum distance between the sliding block 4 and the fixing ring 203. Therefore, the first spring 5 is in a pre-compressed state and always provides a thrust to the sliding block 4 in the direction away from the fixing ring 203, so that the cabinet door 3 has a tendency to move toward the cabinet body 1. With the cooperation of the limit block 401 and the first spiral groove 201, it can be ensured that the cabinet door 3 is always in the closed state when there is no external force. When the hand car 7 needs to be inspected or other operations need to be performed, the cabinet door 3 needs to be opened. To this end, the cabinet door 3 can be manually controlled to swing in the direction 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 limit block 401 slides along the first spiral groove 201 relative to the rotating rod 2. Under the action of the limit block 401 and the first spiral groove 201, the sliding block 4 slides along the slide groove 101 and moves in the direction close to the fixing 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 limit 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 limit block 401, the position of the sliding block 4 is restricted, so that the first spring 5 no longer provides the cabinet door 3 with a restoring force. Under the action of the limit 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 trolley 7 can be controlled to slide along the guide rail 601 and move to the desired position. Preferably, through the cooperation of the limit block 401 with the first spiral groove 201 and the annular groove 202, a certain closing force can always be provided to the cabinet door 3 when the cabinet door 3 is not opened, so as to avoid the cabinet door 3 being in an open state due to misoperation. When the cabinet door 3 needs to be opened, a certain locking force can be provided to the cabinet door 3 when the cabinet door 3 is rotated to within the specified angle range, so as to prevent the cabinet door 3 from accidentally resetting when the trolley 7 is moving, causing interference and collision with the trolley 7.

[0038] See also Figure 5-Figure 13 A switchgear interlocking device is applied to the smart grid high-voltage switchgear, comprising: A rotating sleeve 8 is rotatably mounted in the cabinet 1. A support rod 9 is axially slidable in the rotating sleeve 8. A limiting mechanism connected to the trolley 7 is provided on the support rod 9. An elastic pushing mechanism is provided on the rotating sleeve 8 and the supporting rod 9, and a static contact 19 is connected to the elastic pushing mechanism; The disconnecting mechanism is arranged on the rotating sleeve 8 and connected to the elastic pushing mechanism, including a moving contact 20 cooperating with the static contact 19. The disconnecting mechanism can control the connection between the moving contact 20 and the static contact 19, and lock the position of the trolley 7 through the elastic pushing mechanism and the limiting mechanism.

[0039] Specifically, the trolley 7 has three positions, namely, the working position, the test position, and the maintenance position. When the trolley 7 is in the working position and the test position, the circuit breaker can be opened or closed freely, and 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 an open state. In this regard, in the initial state, the trolley 7 is in the working position. Under the action of the disconnection mechanism, the moving contact 20 is controlled to be connected with the static contact 19, thereby locking the position of the support rod 9 through the elastic pushing mechanism. The position of the trolley 7 is locked by the limiting mechanism. When the position of the trolley 7 needs to be adjusted, the disconnecting mechanism controls the separation of the moving contact 20 and the static contact 19, and drives the rotating sleeve 8 to rotate, so that the position of the support rod 9 is no longer locked by the elastic pushing mechanism. At this time, when the trolley 7 moves, it drives the limiting mechanism to move, so as to drive the elastic pushing mechanism to move through the support rod 9, thereby locking the angle of the rotating sleeve 8, so that the disconnecting mechanism cannot control the movement of the moving contact 20, ensuring that the circuit breaker is always in the disconnected state, so as to ensure the safe use of the switch cabinet.

[0040] See also Figure 4-Figure 7 、 Figures 9-12 The limiting mechanism includes a receiving plate 10 arranged at the end of the support rod 9, and a limiting wheel 11 is rotatably mounted on the receiving plate 10 and abuts against the side wall of the trolley 7. 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 trolley 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 arranged in a right-angled trapezoidal shape, the second limiting groove 703 is arranged in an equilateral trapezoidal shape, and the third limiting groove 704 is arranged in a triangular inclined shape. Triangular blocks 702 are provided 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 first limiting groove 701 and the second limiting groove 703 have the same opening depth. In the initial state, the limiting wheel 11 is located in the first limiting groove 701, and is in abutment with the right-angled side and the hypotenuse of the first limiting groove 701. Under the action of the first limiting groove 701, the trolley 7 is extended into the cabinet 1 to reach the end of the stroke. When the trolley 7 needs to be moved to the test position, the trolley 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 is disengaged from the first limiting groove 701 and slides along the side of the trolley 7. The limiting wheel 11 will also drive the support rod 9 to move toward 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 to move toward the rotating sleeve 8. Under the action of the structure, the resistance to the movement of the trolley 7 is increased, which makes it easier for the staff to know the position of the trolley 7, and when the limiting wheel 11 passes over the triangular block 702, under the action of the elastic pushing mechanism, the limiting wheel 11 is controlled by the support rod 9 to enter the second limiting groove 703. At this time, the limiting wheel 11 will abut against the two oblique sides of the second limiting groove 703, thereby locking the position of the trolley 7. Similarly, when it is necessary to control the trolley 7 to move to the maintenance position, the trolley 7 is continued to be pulled to move, so that the limiting wheel 11 is disengaged from the second limiting groove 703 and moves to the position of cooperating with the third limiting groove 704 until the limiting wheel 11 is separated from the trolley 7. At this time, the trolley 7 can be taken out for maintenance using a trolley. When the inspection is completed, the trolley 7 is controlled to enter the cabinet 1 again, and under the action of the inclined surface of the third limit groove 704, the limit wheel 11 is controlled to abut against the side of the trolley 7 again, thereby ensuring that after the inspection is completed, the limit wheel 11 can still cooperate with the first limit groove 701 and the second limit groove 703 to achieve locking of the trolley 7.

[0042] See also Figure 6-Figure 8 、 Figure 10-13 The elastic pushing mechanism includes a guide column 12 arranged in the cabinet 1, and a fixed plate 16 connected to the static contact 19 is provided on the guide column 12. The axial sliding of the guide column 12 has a sliding plate 15 connected to the support rod 9. A second spring 17 is sleeved on the guide column 12, and the two ends of the second spring 17 are respectively in contact with the sliding plate 15 and the fixed plate 16. The elastic pushing mechanism also includes a guide groove formed on the outer wall of the circumference of the rotating sleeve 8, and the axial sliding of the rotating sleeve 8 has a first guide plate 13 slidably connected to the guide column 12. The inner wall of the first guide plate 13 is provided with a first limiting column 1301 that is slidably engaged with the guide groove and connected to the support rod 9.

[0043] See also Figure 6-Figure 8 、 Figure 10-13The connecting and disconnecting mechanism includes a cylinder 18 arranged on the fixed plate 16, and the axial sliding of the guide column 12 has a second guide plate 14 that is slidably connected to the rotating sleeve 8. The second guide plate 14 is connected to the telescopic end of the cylinder 18. The connecting and disconnecting mechanism also includes a second spiral groove 803 formed on the outer wall of the circumference of the rotating sleeve 8, and the inner wall of the second guide plate 14 is provided with a second limiting column 1401 that is slidably engaged with the second spiral groove 803.

[0044] See also Figure 11 、 Figure 12 , further, the guide groove can be divided into two sections, namely the second spiral groove 803 and the annular groove 801, and the opening angle of the annular groove 801 in the circumferential direction is the same as the opening angle of the second spiral groove 803 in the circumferential direction. In the initial state, the limiting wheel 11 is located in the first limiting groove 701, and the elongation of the second spring 17 in the natural state is greater than the distance between the fixed plate 16 and the sliding plate 15. To this end, the second spring 17 is in a pre-compressed state and always provides a thrust to the support rod 9 through the sliding plate 15 to move in the direction away from the rotating sleeve 8. 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 The positioning post 1401 is located at the end of the stroke of the second spiral groove 803 toward the straight groove 801. At this time, the moving contact 20 and the static contact 19 are in a fitted state, so that the circuit breaker is controlled to be in the on state through the controller 21. Under the action of the second limiting post 1401 and the second spiral groove 803, the first limiting post 1301 is located at the end of the stroke of the annular groove 802 away from the straight groove 801. Under the action of the first limiting post 1301 and the annular groove 802, the position of the support rod 9 is locked, thereby ensuring that the position of the limiting wheel 11 will not change. Under the action of the limiting wheel 11 and the first limiting groove 701, the position of the trolley 7 is in a locked state. When the trolley 7 needs to be adjusted to the test position, the circuit breaker needs to be disconnected. To this end, the cylinder 18 works and pushes the second guide plate 14 to move in a direction away from the fixed plate 16, so that the moving contact 20 is separated from the static contact 19, so that the circuit breaker is controlled to be disconnected through the controller 21. At the same time, the second guide plate 14 will also drive the second limiting post 1401 to slide along the second spiral groove 803, so that the rotating sleeve 8 rotates, thereby driving the annular groove 801 to move. The first limiting post 1301 will slide along the annular groove 801 relative to the rotating sleeve 8. When the second limiting 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 limiting post 1301 just leaves the annular groove 801 and enters the straight groove 802. At this time, the position of the support rod 9 is no longer locked, so that the limiting wheel 11 can move freely. To this end, the trolley 7 can be controlled to be pulled in the direction away from the cabinet 1. Under the action of the inclined surface of the first limiting groove 701, the limiting wheel 11 is disengaged from the first limiting groove 701 and abuts against the side of the trolley 7. The limiting wheel 11 also drives the support rod 9 to move toward the rotating sleeve 8, so that the first limiting column 1301 slides along the straight groove 802. Under the action of the first limiting column 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 does not change when the trolley 7 moves. The support rod 9 also drives the sliding plate 15 to move and compresses the second spring 17. When the limiting wheel 11 moves to the position matched with the second limiting groove 703, the second spring 17 is elastically released and pushes the support rod 9 to move 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, a certain amount of power can be provided to the trolley 7, so that the trolley 7 can move smoothly to the specified position. When the limiting wheel 11 abuts against the two inclined surfaces of the second limiting groove 703, it indicates that the trolley 7 has successfully moved to the test position and the limiting wheel 11 moves to the end of the stroke. In this process, the limiting wheel 11 can play a locking role as well as a positioning role. To ensure that there is no deviation when the trolley 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 annular 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 static contact 19 to fit together or maintain a separation state through the second guide plate 14, and when the moving contact 20 approaches the static contact 19, the second limiting post 1401 will control the rotation of the rotating sleeve 8 through the second spiral groove 803, so that the first limiting post 1301 enters the annular groove 801 again, thereby locking the position of the limiting wheel 11 again; When the trolley 7 needs to be inspected and repaired, the moving contact 20 can be controlled to move again to the end of the stroke away from the static contact 19. At the same time, the trolley 7 is pulled so that the limiting wheel 11 disengages from the second limiting groove 703. When the limiting wheel 11 moves to the position that cooperates with the third limiting groove 704, the second spring 17 is elastically released, so that the limiting wheel 11 abuts against the inclined surface of the second limiting groove 704 until the limiting wheel 11 is separated from the trolley 7. The support rod 9 will move to the end of the stroke away from the rotating sleeve 8, so that the first limiting column 1301 is located at the end of the stroke on the side of the straight groove 802 away from the second spiral groove 803. Under the action of the first limiting column 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 disconnected state when the trolley 7 is separated from the cabinet 1 for inspection.

[0045] Preferably, through the cooperation between the guide groove and the first limiting column 1301 and the second limiting column 1401 and the second spiral groove 803, it can be achieved that when the trolley 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 trolley 7; if the circuit breaker is in the off state, the position of the trolley 7 is no longer locked; when the circuit breaker is disconnected and the trolley 7 is adjusted in 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, thereby ensuring the safe use of the switch cabinet.

[0046] A method for safely operating a switch cabinet interlocking device comprises the following steps: Step 1: When the trolley is in the working position or the test position, the disconnecting mechanism controls the moving contact 20 to contact the static contact 19, and locks the position of the support rod 9 through the elastic pushing mechanism, thereby locking the position of the trolley 7 through the limiting mechanism; Step 2: When the disconnecting mechanism controls the moving contact 20 to separate from the static contact 19, the elastic pushing mechanism no longer locks the position of the support rod 9; Step 3: The position of the trolley 7 can be adjusted, and when the trolley 7 moves, the movement of the limit assembly is controlled, and the angle of the rotating sleeve 8 is limited by the elastic pushing mechanism, so as to lock the position of the moving contact 20 through the disconnecting 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A smart grid high-voltage switchgear, characterized in that: include: A cabinet body, and a support plate arranged in the cabinet body, wherein a guide rail is formed on the support plate, and a trolley is slidably mounted on the guide rail; A rotating rod is rotatably mounted on the cabinet body, and a cabinet door for closing the cabinet body is provided on the rotating rod. A swing locking assembly is provided on the rotating rod, and the swing locking assembly can close or lock the cabinet door according to the swing angle of the cabinet door.

2. The smart grid high-voltage switchgear according to claim 1, characterized in that: The yaw locking assembly includes a slide groove provided on the cabinet body, a first spiral groove and an annular groove formed on the circumferential outer wall of the rotating rod, a sliding block slidably connected to the slide groove for axial sliding of the rotating rod, and a limit block 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 arranged on the rotating rod. A first spring is sleeved on the rotating rod. Two ends of the first spring are respectively in contact with the sliding block and the fixing ring.

3. A switch cabinet interlocking device, applied to the smart grid high-voltage switch cabinet according to claim 1, characterized in that: include: A rotating sleeve is rotatably mounted in the cabinet, a support rod is axially slidable in the rotating sleeve, and a limiting mechanism connected to the trolley is provided on the support rod; an elastic pushing mechanism, provided on the rotating sleeve and the supporting rod, and connected to a static contact; The disconnecting mechanism is arranged on the rotating sleeve and connected to the elastic pushing mechanism, and includes a moving contact cooperating with the static contact. The disconnecting mechanism can control the connection between the moving contact and the static contact, and lock the position of the trolley through the elastic pushing mechanism and the limiting mechanism.

4. A switch cabinet interlocking device according to claim 3, characterized in that: The limiting mechanism includes a receiving plate provided at the end of the support rod, and a limiting wheel abutting against the side wall of the trolley is rotatably mounted on the receiving plate.

5. A switch cabinet interlocking device according to claim 4, 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 trolley, and the first limiting groove, the second limiting groove, and the third limiting groove are in contact with the limiting wheel.

6. A switch cabinet interlocking device according to claim 3, characterized in that: The elastic pushing mechanism includes a guide column arranged in the cabinet body, a fixed plate connected to the static contact is provided on the guide column, a sliding plate connected to the support rod is axially slidable on the guide column, and a second spring is sleeved on the guide column, and the two ends of the second spring are respectively in contact with the sliding plate and the fixed plate.

7. A switch cabinet interlocking device according to claim 6, characterized in that: The elastic pushing mechanism also includes a guide groove formed on the outer circumferential wall of the rotating sleeve. The axial sliding of the rotating sleeve has a first guide plate slidably connected to the guide column. The inner wall of the first guide plate is provided with a first limiting column slidably engaged with the guide groove and connected to the support rod.

8. A switch cabinet interlocking device according to claim 6, characterized in that: The connecting and disconnecting mechanism includes a cylinder arranged on the fixed plate, and the axial sliding of the guide column has a second guide plate slidably connected to the rotating sleeve, and the second guide plate is connected to the telescopic end of the cylinder.

9. A switch cabinet interlocking device according to claim 8, characterized in that: The connecting and disconnecting mechanism further includes a second spiral groove formed on the circumferential outer wall of the rotating sleeve, and the inner wall of the second guide plate is provided with a second limiting column slidably engaged with the second spiral groove.

10. A safe operation method for a switch cabinet interlocking device, using the switch cabinet interlocking device according to claim 3, characterized in that: The following steps are involved: Step 1: When the trolley is in the working position or the test position, the disconnecting mechanism controls the moving contact to contact the static contact, and locks the position of the support rod through the elastic pushing mechanism, so as to lock the position of the trolley through the limit mechanism; Step 2: When the disconnecting mechanism controls the moving contact to separate from the static contact, the elastic pushing mechanism no longer locks the position of the support rod; Step 3: The position of the trolley can be adjusted, and when the trolley moves, the movement of the limit assembly is controlled, and the angle of the rotating sleeve is limited by the elastic pushing mechanism to lock the position of the moving contact through the disconnecting mechanism.

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