Partitioned door opening valve driving structure and high-voltage switch cabinet

Abstract

This invention discloses a partitioned door drive structure and a high-voltage switchgear, belonging to the field of high-voltage switchgear. It includes a front cover and a rear cover, with a left bracket, a right bracket, and a drive shaft installed between them. A bevel gear is installed at one end of the drive shaft. A left drive screw and a right drive screw are also installed between the front and rear covers. A left threaded sleeve is installed on the left bracket and is fitted onto the left drive screw. A right threaded sleeve is installed on the right bracket and is fitted onto the right drive screw. During the door reset process, even if the door is subjected to significant force, the force in the direction of the threaded sleeve's movement will be offset by the drive screw, preventing the door from moving too quickly and ensuring greater safety and reliability. This solves the problem in existing high-voltage switchgear where the door opening and closing speed is too fast, easily injuring operators.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear, and more particularly to a partitioned door drive structure and a high-voltage switchgear. Background Technology

[0002] The existing high-voltage switchgear drive structure generally directly drives the valve to move on the track. Its opening and closing speed is relatively fast, which can easily trap the operator and create a safety hazard.

[0003] For example, the "12kV Miniaturized High-Voltage Switchgear Door Opening Mechanism" disclosed in Chinese patent literature, with publication number CN206546980U, includes: upper and lower door crank arms, a central shaft, upper and lower scissor shafts, a support frame, a fixing plate, and a spring. The fixing plate is installed on the left and right side plates of the circuit breaker compartment of the high-voltage switchgear, the support frame is installed on the fixing plate, the central shaft is installed on the fixing plate, and the spring and upper and lower door crank arms are sleeved on the central shaft. The spring is located between the upper and lower door crank arms, and the upper and lower scissor shafts are installed on the upper and lower door crank arms. The upper and lower door crank arms are connected to the lower end of the upper and lower door connecting rods, and the upper end of the upper and lower door connecting rods are correspondingly connected to the upper and lower door plates. The upper and lower door plates slide up and down on the left and right guide rods, and the positioning pins on the left and right guide rods limit the distance of the up and down movement, which in turn limits the opening angle between the upper and lower door crank arms. The disadvantage of this structure is that the door moves too fast when it is reset and closed, which can easily pinch the operator and create a safety hazard. Summary of the Invention

[0004] The present invention aims to overcome the problem that the opening and closing speed of the valves in the existing high-voltage switchgear is too fast, which can easily injure operators. It provides a valve drive structure and a high-voltage switchgear with partitioned opening and closing, which is safer and more reliable because the speed is not too fast during the opening and closing process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention discloses a partitioned door drive structure, comprising a front cover plate and a rear cover plate. A left bracket, a right bracket, and a drive shaft are installed between the front and rear cover plates. A bevel gear is installed at one end of the drive shaft. A left drive screw and a right drive screw are also installed between the front and rear cover plates. A left threaded sleeve is installed on the left bracket and is adapted to be installed on the left drive screw. A right threaded sleeve is installed on the right bracket and is adapted to be installed on the right drive screw.

[0007] When the valve opens, the rotation of the drive shaft drives the bevel gear, which in turn drives the left and right drive screws to rotate. This causes the left threaded sleeve to move to the left and the right threaded sleeve to move to the right, which in turn causes the left support to move to the left and the right support to move to the right, thus opening the door panels on both sides. During the valve reset process, even if the valve is subjected to a large force, the force in the direction of the threaded sleeve movement will be canceled out by the drive screws, so that the valve's movement speed will not be too fast, making it safer and more reliable.

[0008] Preferably, the system includes a low-level lock for opening low-level access areas within the switchgear and a high-level lock for further opening high-level access areas. High-voltage switchgear is generally divided into multiple zones, each containing different components. Different components have lower requirements for maintenance personnel; for example, the voltage of components in the instrument room is lower, and the inspection process mainly involves numerical recording, requiring less skill from maintenance personnel. However, the voltage in the busbar room is higher, and improper operation can easily lead to electric shock accidents. In existing work environments, fixed maintenance personnel are typically assigned to maintain all zones within the switchgear simultaneously, placing higher demands on these personnel. This solution, through high-level locks, separates zones with higher maintenance requirements from those with lower requirements, allowing the task of maintaining different zones to be assigned to maintenance personnel of different levels, thus saving labor costs. Furthermore, since low-level maintenance personnel cannot open high-level access areas, electric shock accidents caused by inexperienced maintenance personnel's misoperation can be avoided.

[0009] Preferably, an upper crossbeam sleeve is welded to the upper side of the upper bend. The left support includes a left upper crossbeam, and the right support includes a right upper crossbeam. Both the left and right upper crossbeams are installed inside the upper crossbeam sleeve. A left limiting plate is also installed inside the left upper crossbeam, and a right limiting plate is also installed inside the right upper crossbeam. The left limiting plate is connected to the inner wall of the left upper crossbeam by a left tension spring, and the right limiting plate is connected to the inner wall of the right upper crossbeam by a right tension spring. Both the left and right limiting plates are provided with limiting grooves, which include grooves that connect to the drive shaft. The drive shaft has a first and second rotating groove with matching diameters, connected by a connecting groove whose width is smaller than the inner diameter of the first and second rotating grooves. The drive shaft has a recessed portion that can move within the connecting groove. The high-privilege lock includes a lever for moving the left and right limit plates axially to the recessed portion of the drive shaft; the lever is located between the left and right limit plates. When maintenance is required in the low-privilege area, the drive shaft rotates... Simultaneously, the door panels on both sides open outwards. At this time, because the drive shaft is located in the first rotating groove, the left and right limit plates are limited by the drive shaft and cannot move horizontally. Therefore, relative movement occurs between the left limit plate and the upper left crossbeam, and between the right limit plate and the upper right crossbeam, causing the left and right tension springs to be stretched. After the springs have stretched to a certain length, the left and right supports can no longer move. At this time, the low-authority area is opened, while the high-authority area remains closed. When the maintenance personnel complete the maintenance, the left and right tension springs can automatically reset the left and right supports. When maintenance is required on the high-authority area, the high-authority maintenance personnel will activate the high-authority lock, causing the left and right limit plates to move to the drive shaft recess. At this time, because the drive shaft recess can pass through the connecting groove, the left and right limit plates can move in the radial direction of the drive shaft, allowing the left and right supports to move a greater distance, thereby opening the high-authority area.

[0010] Preferably, the low-privilege lock includes a low-privilege lock pin that passes through the drive shaft.

[0011] Preferably, the upper crossbeam sleeve is also equipped with a limit plate reset structure for resetting the left and right limit plates after the block is moved. After the valve is completely closed, the left and right limit plates will reset in the axial direction of the drive shaft. Before the left and right limit plates reset in the axial direction, once the high-authority area of ​​the valve is opened, it is in a state that can be repeatedly opened, which makes it convenient for maintenance personnel to temporarily close the high-authority area for power connection testing.

[0012] Preferably, the limiting plate reset structure includes a wedge that moves in the axial direction of the drive shaft, and the upper left crossbeam and the upper right crossbeam are each provided with a wedge surface adapted to the wedge on the end facing the drive shaft.

[0013] A high-voltage switchgear, the internal space of which includes a low-authority zone in the middle and high-authority zones on both sides of the low-authority zone.

[0014] Therefore, the present invention has the following beneficial effects: (1) it makes the valve reset process less fast and safer and more reliable; (2) it can separate areas with high maintenance requirements from areas with low maintenance requirements, so that the maintenance tasks of different areas can be assigned to maintenance personnel of different levels, thereby saving labor costs; (3) after the high-authority area is opened once, it can be opened repeatedly before the valve is completely closed, which is convenient for maintenance personnel to carry out maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the present invention.

[0017] Figure 3 This invention is in Figure 2 A magnified view of the upper part of the drive shaft.

[0018] Figure 4 This is a schematic diagram of the structure of the left limiting plate of the present invention.

[0019] In the diagram: 1. Front cover plate; 2. Rear cover plate; 3. Left bracket; 4. Right bracket; 5. Drive shaft; 6. Bevel gear; 7. Left drive screw; 8. Right drive screw; 9. Left threaded sleeve; 10. Right threaded sleeve; 11. Rear plate; 12. Upper bend; 13. Lower bend; 14. Upper crossbeam sleeve; 15. Upper left crossbeam; 16. Upper right crossbeam; 17. Lower left crossbeam; 18. Lower right crossbeam; 19. Crossbeam guide block; 20. Guide groove; 21. Left bearing seat; 22. Right bearing seat; 23. First welded part; 24. Second... Welded component 25, upper mounting section 26, lower mounting section 27, first connecting section 28, second connecting section 29, second mounting section 30, left limiting plate 31, right limiting plate 32, left tension spring 33, right tension spring 34, limiting groove 35, first rotating groove 36, second rotating groove 37, drive shaft recess 38, toggle block 39, left limiting block 40, left limiting seat 41, right limiting block 42, right limiting seat 43, low-level lock pin 44, limiting plate reset structure. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-4In the illustrated embodiment, a partitioned door drive structure includes a front cover plate 1 and a rear cover plate 2. A left bracket 3, a right bracket 4, and a drive shaft 5 are installed between the front and rear cover plates. A bevel gear 6 is installed at one end of the drive shaft. A left drive screw 7 and a right drive screw 8 are also installed between the front and rear cover plates. A left threaded sleeve 9 is installed on the left bracket and is adapted to be mounted on the left drive screw. A right threaded sleeve 10 is installed on the right bracket and is adapted to be mounted on the right drive screw. The rear cover plate includes... The rear plate 11 is parallel to the front cover plate, and the upper bend 12 and lower bend 13 are connected to the front cover plate by screws. An upper crossbeam sleeve 14 is welded to the upper side of the upper bend. The left support includes a left upper crossbeam 15, and the right support includes a right upper crossbeam 16. Both the left and right upper crossbeams are installed inside the crossbeam sleeve. The left support also includes a left lower crossbeam 17, and the right support also includes a right lower crossbeam 18. Both the left and right lower crossbeams are installed in the lower bend. The lower bend also has a crossbeam guide block 19. Each of the lower right crossbeams is provided with a guide groove 20. The length direction of the guide groove is the same as the movement direction of the left and right supports. At least two crossbeam guide blocks are installed in each guide groove, and the height of the crossbeam guide blocks is the same as the height of the guide groove. The two ends of the left transmission screw are equipped with a left bearing and a left bearing seat 21, and the left bearing seat is fixedly installed on the cover plate. The two ends of the right transmission screw are equipped with a right bearing and a right bearing seat 22, and the right bearing seat is fixedly installed on the cover plate. The left support also includes a left welded component, which includes a first welded component 23 and a second welded component 24. The first welded component includes an upper mounting section 25, a lower mounting section 26, and a first connecting section 27. The upper mounting section is connected to the upper left crossbeam, and the lower mounting section is connected to the lower left crossbeam. The second welded component includes a second connecting section 28 and a second mounting section 29. The second connecting section is welded to the first connecting section, and the second mounting section is installed in the lower left crossbeam. The right support also includes a right welded component with the same structure as the left welded component. The first connecting section and the second connecting section are inclined relative to the movement direction of the lower left crossbeam.

[0022] A high-voltage switchgear includes a central low-access zone and two adjacent high-access zones. The valve drive structure further includes a low-access lock for opening the low-access zone and a high-access lock for further opening the high-access zones. A left limiting plate 30 is installed in the upper left crossbeam, and a right limiting plate 31 is installed in the upper right crossbeam. The left limiting plate is connected to the inner wall of the upper left crossbeam by a left tension spring 32, and the right limiting plate is connected to the inner wall of the upper right crossbeam by a right tension spring 33. Both the left and right limiting plates are provided with limiting grooves 34, each groove including a first rotating groove 35 and a second rotating groove 36 adapted to the outer diameter of the drive shaft. A first rotating groove and a second rotating groove are connected by a connecting groove. The width of the connecting groove is smaller than the inner diameter of the first rotating groove and the second rotating groove. The drive shaft is provided with a drive shaft recess 37 that can move in the connecting groove. There are two drive shaft recesses in the axial direction of the drive shaft, located below the initial position of the left limiting plate and above the initial position of the right limiting plate, respectively. The high-level lock includes a lever 38 for moving the left and right limiting plates to the drive shaft recesses in the axial direction of the drive shaft. The lever is located between the left and right limiting plates. The left limiting plate is located at... A left limiting block 39 is provided on the lower side of the right limiting plate and the upper side of the left limiting plate. A left limiting seat 40 located to the left of the left limiting block is also provided in the upper left crossbeam. The distance from the left limiting block to the left limiting seat is equal to the length of the connecting groove. Similarly, a right limiting block 41 is provided on the upper side of the right limiting plate and the right limiting plate is located on the lower side of the right limiting plate. A right limiting seat 42 located to the right of the right limiting block is also provided in the upper right crossbeam. The distance from the right limiting block to the right limiting seat is equal to the length of the connecting groove. The low-level lock includes a low-level lock pin 43 passing through the drive shaft. After the low-level lock is opened, the low-level lock... The pin retracts from the drive shaft; when the high-authority lock is opened, the lever rotates, and the lever is equipped with a torsion spring, which automatically resets after rotation; the crossbeam sleeve is also equipped with a limit plate reset structure 44 for resetting the left and right limit plates after the lever is moved; the limit plate reset structure includes a wedge that moves in the axial direction of the drive shaft, and the upper left and upper right crossbeams are each equipped with a wedge surface that matches the wedge on the end facing the drive shaft; the drive shaft is generally controlled by a handle, which is equipped with a pin. After the handle is rotated to open the valve, it can be fixed by the pin.

[0023] The transmission process of the valve is as follows: the rotation of the drive shaft drives the bevel gear to rotate, which in turn drives the left and right drive screws to rotate, causing the left screw sleeve to move to the left and the right screw sleeve to move to the right, thereby causing the left bracket to move to the left and the right bracket to move to the right, thus opening the door panels on both sides.

[0024] When maintenance is required on the low-access area, the low-access lock pin disengages from the drive shaft, allowing the drive shaft to rotate. Simultaneously, the rotation of the drive shaft opens the door panels on both sides outwards. At this time, because the drive shaft is located within the first rotation groove, the left and right limit plates are restricted from horizontal movement by the drive shaft. Therefore, relative movement occurs between the left limit plate and the upper left crossbeam, and between the right limit plate and the upper right crossbeam, causing the left and right tension springs to stretch. After the springs have stretched to a certain length, the left limit block contacts the left limit seat, and the right limit block contacts the right limit seat, preventing the left and right supports from moving further. When the high-authority area is open, the low-authority area remains closed. After maintenance is completed, the left and right tension springs automatically reset the left and right supports. When maintenance is required on the high-authority area, the high-authority maintenance personnel activate the high-authority lock, causing the left limit plate to move downwards and the right limit plate to move upwards, both moving to the drive shaft recess. Since the drive shaft recess can pass through the connecting groove, the left and right limit plates can move radially along the drive shaft, allowing the left and right supports to move a greater distance, thus opening the high-authority area.

[0025] When a low-authority maintenance worker discovers a problem during maintenance that requires opening a high-authority area for repair, they can notify a high-authority maintenance worker to further open the valve while it is in the low-authority area. The process is as follows: using the high-authority lock's lever, the left and right limit plates are moved to the drive shaft recess. Under the action of the left and right tension springs, the left limit plate moves to the left and the right limit plate moves to the right, causing the left limit block and left limit seat to separate, and the right limit block and right limit seat to separate. At this point, the left and right supports can be further opened outwards.

[0026] When the high-authority area needs to be temporarily closed during maintenance, such as when the busbar in the busbar compartment needs to be replaced, the high-authority area needs to be opened after power is cut off. However, to determine whether the switchgear is working properly after the busbar replacement, the high-authority area needs to be closed and then powered on for testing. This will cause the high-authority area to need to be opened and closed repeatedly. After the high-authority area is opened once, the left and right limit plates are both in the drive shaft recess. The high-authority area can be opened and closed repeatedly without using the high-authority lock until the maintenance is completely completed. Then, the limit plate reset structure resets the left and right limit plates in the axial direction of the drive shaft, and the high-authority area is locked again.

Claims

1. A partitioned door opening valve drive structure applied to a high voltage switch cabinet, characterized in that, The utility model relates to a switch cabinet, including front cover plate and rear cover plate, install left support, right support and drive shaft between front cover plate and rear cover plate, install pinion on one end of drive shaft, still install left transmission screw rod and right transmission screw rod between front cover plate and rear cover plate, install left screw sleeve on left support, left screw sleeve is installed on left transmission screw rod, install right screw sleeve on right support, right screw sleeve is installed on right transmission screw rod, left support includes left upper crossbeam, right support includes right upper crossbeam, still install left limit board in left upper crossbeam, still install right limit board in right upper crossbeam, all be equipped with limit slot on left limit board and right limit board, limit slot includes with the first rotation groove and the second rotation groove of the outer diameter size adaptation of drive shaft, the first rotation groove and the second rotation groove are connected through connecting groove, and the width of connecting groove is less than the inner diameter of the first rotation groove and the second rotation groove, drive shaft is equipped with the drive shaft recess portion that can move in connecting groove, and the space in switch cabinet includes low authority area in the middle and high authority area on both sides of low authority area, still include high authority lock for further opening high authority area of switch cabinet, and high authority lock includes the prong block for pronging left limit board and right limit board at drive shaft recess portion in the axial direction of drive shaft.

2. A shutter driving structure of a partitioned door according to claim 1, wherein The utility model relates to a switch cabinet, including low authority lock for opening low authority area in switch cabinet.

3. A shutter drive structure for a partitioned door according to claim 2, wherein Front cover plate is connected with upper bending part and lower bending part through screw, and the upper side of upper bending part is welded with upper crossbeam sleeve, left upper crossbeam and right upper crossbeam are installed in upper crossbeam sleeve, left limit board and left upper crossbeam inner wall are connected through left tension spring, and right limit board and right upper crossbeam inner wall are connected through right tension spring, prong block is located between left limit board and right limit board, the upper side of left limit board is also equipped with left limit block, the upper side of right limit board is also equipped with right limit block, left limit seat in left limit block left side is also equipped with in left upper crossbeam, and right limit seat in right limit block right side is also equipped with in right upper crossbeam.

4. The shutter driving structure of claim 2, wherein the shutter driving structure is characterized by, Low authority lock includes low authority lock bolt passing through drive shaft.

5. A shutter drive structure for a partitioned door according to claim 3, wherein Upper crossbeam sleeve is also installed with limit board reset structure for resetting left limit board and right limit board after being pronged by prong block.

6. A shutter drive structure for a zoned door according to claim 5, wherein The limit board reset structure includes a wedge that moves in the axial direction of the drive shaft, and the left upper crossbeam and the right upper crossbeam each have a wedge surface on the end facing the drive shaft that is adapted to the wedge.

7. A shutter drive structure for a partitioned door according to claim 5, wherein When maintenance of the high authority area is needed, a high authority maintenance personnel prongs the high authority lock, causing the left limit board to be pronged downward and the right limit board to be pronged upward and both to move to the drive shaft recess portion. At this time, because the drive shaft recess portion can pass through the connecting groove, the left limit board and the right limit board can move in the radial direction of the drive shaft, causing the left support and the right support to be able to move a further distance.

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