A flexible DC valve tower interlayer insulator maintenance device

Abstract

The present invention belongs to the technical field of valve towers, and particularly relates to a flexible DC valve tower interlayer insulator maintenance device, which includes a maintenance plate. A motor is arranged inside the maintenance plate. A support rod is vertically and upwardly fixed to the driving end of the motor. A support plate is fixedly sleeved on the outer wall of the support rod. The end of the support plate is connected to a lifting plate. The end of the lifting plate is fixedly connected to a convex plate, and a chute is formed on the outer wall of the convex plate. When maintaining the insulator, the present invention clamps the maintenance plate and the valve tower through the abutting plate and the baffle with the cross arm, ensuring the stability of the maintenance plate during the maintenance and replacement process. The clamping plate moves to the outside of the insulator, and the contraction of the clamping plate is achieved through the movement of the sliding plate to contact and clamp the insulator, ensuring that the insulator will not fall during removal. The setting of the moving mechanism and the rotation of the support rod facilitate the maintenance and removal of insulators at multiple positions.

Description

Technical Field

[0001] The present invention relates to the technical field of valve towers, and particularly to a maintenance device for interlayer insulators of a flexible DC valve tower. Background Art

[0002] Most high-voltage large-capacity flexible DC converter valves adopt a tower structure, which consists of multiple valve segments to form a valve layer. The interlayer insulators support and fix the valve layer. The interlayer insulators play a role of support and insulation in the flexible DC valve tower, and are generally fixed around the upper and lower valve segments and connected to the metal frames at both ends of the valve segments.

[0003] After long-term operation, the insulators will age and the core rods will break, so the insulators need to be repaired and replaced. When replacing, generally, workers use wire clamps to clamp the wires and tighten the wires, and then turn a special wrench to tighten the wires, so that the tension between the insulator and both ends becomes smaller, and then the insulator can be replaced. However, the insulator itself is heavy, and when there is no auxiliary replacement device, it is easy for the insulator to fall and cause difficulties in the operation.

[0004] To solve the above problems, we propose a maintenance device for interlayer insulators of a flexible DC valve tower. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems that the insulator itself is heavy and it is easy for the insulator to fall and cause difficulties in the operation when there is no auxiliary replacement device, and to propose a maintenance device for interlayer insulators of a flexible DC valve tower.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: A maintenance device for interlayer insulators of a flexible DC valve tower, including a maintenance board. A motor is arranged inside the maintenance board. A support rod is vertically and upwardly fixed at the driving end of the motor. A support plate is fixedly sleeved on the outer wall of the support rod. The end of the support plate is connected with a lifting plate. The end of the lifting plate is fixedly connected with a convex plate. A sliding groove is formed on the outer wall of the convex plate. A sliding plate is slidably arranged in the sliding groove. Two clamping plates for clamping the insulator are rotatably connected to the outer wall of the convex plate. Two vertical rods are fixedly connected to the upper side walls of the two clamping plates. A connecting rod is rotatably connected between the end of the sliding plate and the upper ends of the two vertical rods. An expansion rod is fixedly connected inside the sliding groove. The driving end of the expansion rod is fixedly connected with the end of the sliding plate located inside the sliding groove. A lifting mechanism for driving the lifting plate to lift is arranged on the support plate.

[0007] In the above-mentioned maintenance device for the interlayer insulator of a flexible DC valve tower, the lifting mechanism includes a fixing plate fixed to the upper side wall of the support plate. A motor one is fixed to the upper end of the fixing plate. A wire winding wheel is fixed to the driving end of the motor one. A steel wire rope is wound around the wire winding wheel. The end of the steel wire rope is fixedly connected to the upper side wall of the lifting plate. A limiting plate is fixedly connected to the end of the support plate. A groove is formed in the limiting plate. A straight plate is slidably arranged in the groove. The upper end of the straight plate is fixedly connected to the outer wall of the lifting plate.

[0008] In the above-mentioned maintenance device for the interlayer insulator of a flexible DC valve tower, a guiding plate is fixedly connected to the lower side wall of the maintenance plate. Right-angle plates are slidably sleeved at both ends of the guiding plate. Through grooves matching the ends of the guiding plate are formed at the ends of the right-angle plates. A moving mechanism is installed on the outer wall of the right-angle plate. The moving mechanism includes two roller groups symmetrically arranged up and down and composed of a plurality of rollers. Chain wheels one are fixed to the ends of the plurality of rollers in the roller group. A chain is sleeved on the outer walls of the plurality of chain wheels. A motor is fixedly connected to the outer wall of the right-angle plate. A chain wheel two meshing with the chain is fixedly connected to the end of the motor.

[0009] In the above-mentioned maintenance device for the interlayer insulator of a flexible DC valve tower, two adjusting plates are fixed to the outer wall of the right-angle plate by bolts. The moving mechanism is arranged on the adjusting plates. The distance between the two moving mechanisms is adjusted by the up and down movement of the adjusting plates.

[0010] In the above-mentioned maintenance device for the interlayer insulator of a flexible DC valve tower, a motor two is fixedly connected to the lower side wall of the guiding plate. A turntable is fixed to the driving end of the motor two. A pull rod is rotatably connected between the outer wall of the turntable deviating from the center and the outer wall of the right-angle plate.

[0011] In the above-mentioned maintenance device for the interlayer insulator of a flexible DC valve tower, baffles are symmetrically and fixedly connected to the upper side wall of the maintenance plate. A cavity is formed in the maintenance plate. A slot communicating with the cavity is formed in the maintenance plate below the baffle. A pressing plate is slidably arranged in the slot. A telescopic spring is fixedly connected between the pressing plate and the bottom wall of the cavity. A swing plate with its end located below each pressing plate is rotatably connected in the cavity. An oil cylinder is fixedly embedded in the upper side wall of the maintenance plate. The driving end of the oil cylinder vertically penetrates downward and extends into the cavity and is fixedly connected to a push plate contacting the upper side wall of the side of the swing plate away from the pressing plate.

[0012] Compared with the existing technology, the advantages of this maintenance device for the interlayer insulator of a flexible DC valve tower are as follows:

[0013] 1. By adjusting the distance between the two adjusting plates, it is ensured that the rollers can contact the cable. The rollers rotate to move on the outer wall of the cable, realizing the movement of the maintenance plate.

[0014] 2. First, place the maintenance plate above the cable, with two right-angle plates located between the cables. Then, when the turntable rotates forward driven by the second motor, the right-angle plates move outward, causing the moving mechanism to sleeve on the outer wall of the cable. Subsequently, the turntable can move the right-angle plates back to disengage from the cable, achieving the removal of the maintenance plate, which is applicable to cables with different spacing distances.

[0015] 3. Move the maintenance plate until the cross arm is inserted into the baffle. Start the oil cylinder. The driving end of the oil cylinder extends downward to drive the push plate to move downward. The push plate pushes the end of the swing plate to rotate downward, and the other end of the swing plate rotates upward to push the pressing plate to move upward and contact the lower side wall of the cross arm. The inner top wall of the baffle contacts the upper side wall of the cross arm, thereby completing the clamping of the cross arm, that is, completing the connection and fixation between the maintenance plate and the cross arm, ensuring the stability of the maintenance plate during the inspection and replacement of the insulator and preventing the problem of movement.

[0016] 4. The first motor drives the wire reel to rotate in reverse, causing the end of the steel wire rope to descend, moving the clamping plate to the outside of the insulator. The telescopic rod drives the sliding plate to move into the chute, and the end of the connecting rod moves toward the convex plate side, pulling the end of the clamping plate to rotate inward and contact and clamp the insulator. At this time, the insulator can be removed, avoiding the problem of manual holding or dropping.

[0017] In summary, when the present invention performs the inspection of the insulator, the connection between the maintenance plate and the valve tower is completed by clamping the cross arm with the pressing plate and the baffle, ensuring the stability of the maintenance plate during the inspection and replacement process. The clamping plate is moved to the outside of the insulator, and the sliding plate is moved to make the clamping plate contract and contact and clamp the insulator, ensuring that the insulator will not drop during removal. The work of inspecting and removing insulators at multiple positions is facilitated through the setting of the moving mechanism and the rotation of the support rod. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a flexible DC valve tower interlayer insulator inspection device proposed by the present invention;

[0019] Figure 2 It is an enlarged view of the structure of part A in a flexible DC valve tower interlayer insulator inspection device proposed by the present invention;

[0020] Figure 3 It is an enlarged view of the structure of part B in a flexible DC valve tower interlayer insulator inspection device proposed by the present invention;

[0021] Figure 4 It is a schematic structural diagram of the connection between the pressing plate and the swing plate in a flexible DC valve tower interlayer insulator inspection device proposed by the present invention;

[0022] Figure 5 It is a schematic structural diagram of the connection between the turntable and the pull rod in a flexible DC valve tower interlayer insulator inspection device proposed by the present invention.

[0023] In the figure: 1 is the maintenance plate, 2 is the guide plate, 3 is the right-angle plate, 4 is the through groove, 5 is the roller, 6 is the baffle plate, 7 is the pressing plate, 8 is the oil cylinder, 9 is the telescopic spring, 10 is the swing plate, 11 is the support rod, 12 is the support plate, 13 is the fixing plate, 14 is the wire winding wheel, 15 is the steel wire rope, 16 is the limiting plate, 17 is the straight plate, 18 is the lifting plate, 19 is the convex plate, 20 is the sliding plate, 21 is the clamping plate, 22 is the vertical rod, 23 is the connecting rod, 24 is the slotted groove, 25 is the turntable, 26 is the pull rod. Specific implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0026] Refer to Figures 1 - 5 , a flexible DC valve tower interlayer insulator maintenance device, including a maintenance plate 1. The lower side wall of the maintenance plate 1 is fixedly connected with a guide plate 2. Both ends of the guide plate 2 are slidably sleeved with right-angle plates 3. The end of the right-angle plate 3 is provided with a through groove 4 matching the end of the guide plate 2. A moving mechanism is installed on the outer wall of the right-angle plate 3. The moving mechanism includes two sets of rollers 5 arranged symmetrically up and down, each set consisting of multiple rollers 5. The ends of the multiple rollers 5 in the roller group 5 are all fixed with a first sprocket. A chain is sleeved on the outer walls of the multiple sprockets. A motor is fixedly connected to the outer wall of the right-angle plate 3. The end of the motor is fixedly connected with a second sprocket meshing with the chain. Two adjusting plates are fixed to the outer wall of the right-angle plate 3 by bolts. The moving mechanism is arranged on the adjusting plates. By adjusting the up and down movement of the adjusting plates, the distance between the two moving mechanisms is adjusted. When moving the maintenance plate 1, place the maintenance plate 1 on the valve tower. The motor drives the second sprocket to rotate, and the second sprocket drives the chain, the first sprocket, and the roller 5 to rotate, realizing the movement of the maintenance plate 1. Or place the valve tower cable between the roller groups. The roller 5 contacts the outer wall of the cable. By adjusting the distance between the two adjusting plates, ensure that the roller 5 can contact the cable. The roller 5 rotates to walk on the outer wall of the cable, realizing the movement of the maintenance plate 1.

[0027] The lower side wall of the guide plate 2 is fixedly connected to a motor 2, and the driving end of the motor 2 is fixedly connected to a turntable 25. The outer wall of the turntable 25 deviates from the center of the circle and is rotatably connected to the outer wall of the right-angle plate 3. In order to adapt to cables with different intervals, the applicability can also be increased by adjusting the distance between the two right-angle plates 3. Starting the motor 2 drives the turntable 25 to rotate. The turntable 25 rotates forward, and the connection between the pull rod 26 and the turntable 25 rotates outward, pushing the right-angle plate 3 to move outward. When the turntable 25 is reversed, the connection between the pull rod 26 and the turntable 25 rotates inward, pulling the right-angle plate 3 to move inward, and shortening the distance between the two right-angle plates 3. Further, in the specific use process, the inspection plate 1 can be placed on the upper side of the cable first, and the two right-angle plates 3 are located between the cables. Then, when the turntable 25 is driven by the motor 2 to rotate forward, the right-angle plate 3 moves outward, so that the moving mechanism is sleeved on the outer wall of the cable, and the turntable 25 can move the right-angle plate 3 back and away from the cable, thereby realizing the removal of the inspection plate 1.

[0028] The upper side wall of the inspection plate 1 is symmetrically fixedly connected with a baffle 6, a cavity is opened in the inspection plate 1, and a slot 24 is opened on the inspection plate 1, which is located at the lower side of the baffle 6 and connected to the cavity. A clamping plate 7 is slidably arranged in the slot 24, and a telescopic spring 9 is fixedly connected between the clamping plate 7 and the bottom wall of the cavity. A swing plate 10 with an end located at the lower end of each clamping plate 7 is rotatably connected in the cavity. An oil cylinder 8 is fixedly embedded in the upper side wall of the inspection plate 1, and the driving end of the oil cylinder 8 vertically extends downward through the cavity and is fixedly connected with a pusher contacting the upper side wall of the swing plate 10 away from the clamping plate 7. When the inspection plate 1 moves to the cross arm where the insulator is installed, the inspection plate 1 is moved until the cross arm is inserted into the baffle 6, and the oil cylinder 8 is started. The driving end of the oil cylinder 8 extends downward to drive the push plate to move downward, and the push plate pushes the end of the swing plate 10 to rotate downward. The other end of the swing plate 10 rotates upward to push the clamping plate 7 to move upward and contact with the lower side wall of the cross arm. The inner top wall of the baffle 6 contacts with the upper side wall of the cross arm, thereby completing the clamping of the cross arm, that is, completing the connection and fixation of the inspection plate 1 and the cross arm, ensuring the stability of the inspection plate 1 during the inspection and replacement of the insulator, and preventing the problem of movement.

[0029] Inside the maintenance board 1, there is a motor. A support rod 11 is vertically and upwardly fixed to the driving end of the motor. A support plate 12 is fixedly sleeved on the outer wall of the support rod 11. The end of the support plate 12 is connected to a lifting plate 18. The end of the lifting plate 18 is fixedly connected to a convex plate 19. A chute is provided on the outer wall of the convex plate 19. A sliding plate 20 is slidably arranged in the chute. Two clamping plates 21 for clamping the insulator are rotatably connected to the outer wall of the convex plate 19. Two vertical rods 22 are fixedly connected to the upper side walls of the two clamping plates 21. Link rods 23 are rotatably connected between the end of the sliding plate 20 and the upper ends of the two vertical rods 22. A telescopic rod is fixedly connected inside the chute. The driving end of the telescopic rod is fixedly connected to one end of the sliding plate 20 located inside the chute. The motor drives the support rod 11 to rotate until the clamping plate 21 is located above the insulator. Motor 1 drives the wire winding wheel 14 to reverse, causing the end of the steel wire rope 15 to descend, moving the clamping plate 21 to the outside of the insulator. The telescopic rod drives the sliding plate 20 to move into the chute, and the end of the link rod 23 moves towards one side of the convex plate 19, pulling the end of the clamping plate 21 to rotate inwards to contact and clamp the insulator. At this time, the insulator can be removed, avoiding the problems of manual holding or dropping.

[0030] An elevating mechanism for driving the lifting plate 18 to lift and lower is provided on the support plate 12. The elevating mechanism includes a fixing plate 13 fixed to the upper side wall of the support plate 12. A motor 1 is fixed to the upper end of the fixing plate 13. A wire winding wheel 14 is fixed to the driving end of the motor 1. A steel wire rope 15 is wound around the wire winding wheel 14. The end of the steel wire rope 15 is fixedly connected to the upper side wall of the lifting plate 18. A limiting plate 16 is fixedly connected to the end of the support plate 12. A groove is provided in the limiting plate 16. A straight plate 17 is slidably arranged in the groove. The upper end of the straight plate 17 is fixedly connected to the outer wall of the lifting plate 18. After the insulator is removed, motor 1 drives the wire winding wheel 14 to rotate forward to wind up the steel wire rope 15, pulling the lifting plate 18 to move upward. The straight plate 17 slides upward in the groove, lifting the insulator. Then the motor drives the support rod 11 to rotate away from the position of the cross arm, and then the maintenance board 1 is moved to perform the maintenance and replacement work of the next insulator.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flexible DC valve tower interlayer insulator maintenance device, including a maintenance board (1). Characterized in that, A motor is arranged inside the maintenance board (1). A support rod (11) is vertically and upwardly fixed to the driving end of the motor. A support plate (12) is fixedly sleeved on the outer wall of the support rod (11). The end of the support plate (12) is connected to a lifting plate (18). The end of the lifting plate (18) is fixedly connected to a convex plate (19). A chute is opened on the outer wall of the convex plate (19). A sliding plate (20) is slidably arranged in the chute. Two clamping plates (21) for clamping the insulator are rotatably connected to the outer wall of the convex plate (19). Two vertical rods (22) are fixedly connected to the upper side walls of the two clamping plates (21). Link rods (23) are rotatably connected between the end of the sliding plate (20) and the upper ends of the two vertical rods (22). A telescopic rod is fixedly connected inside the chute. The driving end of the telescopic rod is fixedly connected to one end of the sliding plate (20) located inside the chute. A lifting mechanism for driving the lifting plate (18) to lift is arranged on the support plate (12). A guide plate (2) is fixedly connected to the lower side wall of the maintenance board (1). Right-angle plates (3) are slidably sleeved at both ends of the guide plate (2). A through groove (4) matching the end of the guide plate (2) is opened at the end of the right-angle plate (3). A moving mechanism is installed on the outer wall of the right-angle plate (3). The moving mechanism includes two roller groups symmetrically arranged up and down and composed of a plurality of rollers (5). Chain wheels one are fixed to the ends of the plurality of rollers (5) in the roller group. A chain is sleeved on the outer walls of the plurality of chain wheels. A motor is fixed to the outer wall of the right-angle plate (3). A chain wheel two meshing with the chain is fixedly connected to the end of the motor. Two adjusting plates are fixed to the outer wall of the right-angle plate (3) by bolts. The moving mechanism is arranged on the adjusting plates. The distance between the two moving mechanisms is adjusted by the up and down movement of the adjusting plates. Baffles (6) are symmetrically and fixedly connected to the upper side wall of the maintenance board (1). A cavity is opened inside the maintenance board (1). An opening groove (24) located below the baffle (6) and communicating with the cavity inside is opened on the maintenance board (1). A pressing plate (7) is slidably arranged in the opening groove (24). A telescopic spring (9) is fixedly connected between the pressing plate (7) and the bottom wall of the cavity. A swing plate (10) with its end located below each pressing plate (7) is rotatably connected inside the cavity. An oil cylinder (8) is fixedly embedded in the upper side wall of the maintenance board (1). The driving end of the oil cylinder (8) vertically penetrates downward and extends into the cavity and is fixedly connected to a push plate contacting the upper side wall of the side of the swing plate (10) away from the pressing plate (7).

2. The flexible DC valve tower interlayer insulator maintenance device according to claim 1. Characterized in that, The lifting mechanism includes a fixing plate (13) fixed to the upper side wall of the support plate (12). A first motor is fixed to the upper end of the fixing plate (13). A wire winding wheel (14) is fixed to the driving end of the first motor. A steel wire rope (15) is wound around the wire winding wheel (14). The end of the steel wire rope (15) is fixedly connected to the upper side wall of the lifting plate (18). A limiting plate (16) is fixedly connected to the end of the support plate (12). A groove is formed in the limiting plate (16). A straight plate (17) is slidably arranged in the groove. The upper end of the straight plate (17) is fixedly connected to the outer wall of the lifting plate (18).

3. The flexible DC valve tower interlayer insulator maintenance device according to claim 2, characterized in that, A second motor is fixedly connected to the lower side wall of the guide plate (2). A turntable (25) is fixedly connected to the driving end of the second motor. A pull rod (26) is rotatably connected between the outer wall of the turntable (25) deviating from the center of the circle and the outer wall of the right-angle plate (3).

Images