Energy storage ball valve low-torque driving structure suitable for frequent opening and closing working conditions

Abstract

The invention relates to the technical field of energy storage ball valves, in particular to an energy storage ball valve low-torque driving structure suitable for frequent opening and closing working conditions, which comprises a ball body and a valve rod at the top, a protective shell is arranged at the top of the valve rod, a driving mechanism is arranged in the protective shell, and a servo motor is bolted to the top of the inner wall of the protective shell. The output end of the servo motor is in bolted connection with the driving mechanism; the driving mechanism comprises a shaft rod, the top of the shaft rod is in bolted connection with the output end of the servo motor, an inner gear ring is in bolted connection with the interior of the protective shell, a sun gear is rotationally connected with the interior of the inner gear ring, and a plurality of planet gears are connected between the sun gear and the inner gear ring in an engaged mode. The energy storage ball valve low-torque driving structure suitable for the frequent opening and closing working condition has the advantages that sealing pre-tightening force can be eliminated in an auxiliary mode in the initial opening and closing stage, the instantaneous load of a motor is reduced, and meanwhile the reliable anti-reversion function is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage ball valves, in particular to a low-torque driving structure of an energy storage ball valve suitable for frequent opening and closing conditions. BACKGROUND

[0002] As is known, an energy storage ball valve is a valve for controlling fluid on-off by rotating a ball, which has the characteristics of reliable sealing, small flow resistance and long service life, and is widely used in liquid cooling pipelines and high-pressure systems of battery energy storage systems, and the low-torque driving structure of the energy storage ball valve suitable for frequent opening and closing conditions is a driving assembly specially designed for the ball valve in the energy storage system which needs to frequently switch the fluid passage.

[0003] The existing driving structure of the energy storage ball valve mostly adopts the design of motor + worm gear transmission, which can meet the basic opening and closing requirements, but has the following defects under frequent opening and closing conditions.

[0004] In order to ensure the zero-leakage sealing of the high-pressure fluid of the energy storage system, the ball of the ball valve and the valve seat need to maintain a certain sealing pre-tightening force. In the existing driving structure, the high-torque output of the servo motor is needed to break through the pre-tightening force at the initial stage of opening and closing. During the frequent opening and closing process, the motor is subjected to long-term high instantaneous load, which not only consumes energy, but also easily causes the motor winding to overheat and the gear transmission components to impact and wear, thereby shortening the service life of the driving structure.

[0005] In addition, the operating environment of the energy storage system is complex. Low-temperature conditions can increase the viscosity of the medium, further increasing the resistance of the ball rotation. High-pressure fluctuation conditions can cause additional resistance of the ball due to fluid impact. The existing driving structure needs to resist the superimposed load of the sealing pre-tightening force, the medium resistance and the impact resistance, and is prone to opening and closing jam due to insufficient instantaneous torque, thereby affecting the heat dissipation and timeliness of the liquid cooling system. SUMMARY

[0006] (I) Technical problems solved

[0007] In view of the shortcomings of the prior art, the present application provides a low-torque driving structure of an energy storage ball valve suitable for frequent opening and closing conditions, which has the advantages of being able to assist in eliminating the sealing pre-tightening force at the initial stage of opening and closing, reducing the instantaneous load of the motor, and having reliable anti-reverse function.

[0008] (II) Technical solutions

[0009] The above technical purposes of the present application are achieved by the following technical solutions: a low-torque driving structure of an energy storage ball valve suitable for frequent opening and closing conditions, comprising a ball and a valve rod at the top, a protective shell is arranged at the top of the valve rod, a driving mechanism is arranged in the protective shell, a servo motor is bolted to the top of the inner wall of the protective shell, and the output end of the servo motor is bolted to the driving mechanism.

[0010] The driving mechanism comprises a shaft rod, the top of the shaft rod is connected with the output end of a servo motor, the inside of the protective shell is connected with an inner gear ring, the inside of the inner gear ring is rotatably connected with a sun gear, a plurality of planet gears are in meshing connection between the sun gear and the inner gear ring, the top and bottom of the plurality of planet gears are rotatably connected with planet carriers, the bottom of the bottom planet carrier is connected with a connecting shaft, the bottom of the connecting shaft is fixedly connected with a valve rod, the top of the top planet carrier is connected with the shaft rod, and the bottom end of the surface of the connecting shaft is sleeved with an auxiliary opening and closing assembly and an anti-reverse assembly.

[0011] By adopting the above technical scheme, the driving mechanism is used in cooperation with the planetary gear transmission and the servo motor driving, so that the problems of large torque load, high energy consumption and serious wear of the traditional motor and worm gear transmission under the frequent opening and closing condition can be solved, the multi-tooth meshing characteristics of the planetary gear set can disperse the transmission load, the single-tooth stress can be greatly reduced, the transmission efficiency can be significantly improved by the cooperative transmission of the inner gear ring and the planet carrier, and the torque loss can be reduced; the auxiliary opening and closing assembly is designed by using the hydraulic auxiliary thrust, and the problem of too high instantaneous load of the motor caused by the superposition of the sealing pre-tightening force, medium resistance and impact resistance at the initial opening and closing stage can be solved, the auxiliary opening and closing assembly is extended at the initial opening and closing stage, the auxiliary thrust is provided for the connecting shaft, the sealing pre-tightening force of the ball and the valve seat is directly eliminated, the torque demand of the motor during starting is greatly reduced, so that the continuous stability during frequent opening and closing can be ensured, and the timely switching of the liquid cooling pipeline and the electrolyte passage of the energy storage system can be ensured; the anti-reverse assembly is designed by using the mechanical locking and bidirectional protection, the connecting shaft can be firmly locked after the ball valve is opened and closed to the position, the valve rod can be prevented from being reversed due to the fluid pressure impact and system vibration, and the locking blocks arranged in the two directions can ensure that the ball can be stably locked at the two limit positions of opening and closing, so that the sealing failure or passage switching failure caused by the position deviation after frequent opening and closing can be avoided.

[0012] The inner gear ring is further provided with a sealing shell connected to the top and bottom of the inner gear ring, the bottom of the shaft rod and the connecting shaft penetrates the inside of the sealing shell, and the connection between the shaft rod and the connecting shaft and the sealing shell is rotatably connected through a bearing.

[0013] By adopting the above technical scheme, the sealing shell is provided, the protective effect of the sealing shell enables the planetary gear set to run in a clean and lubricated environment, reduces the wear and failure caused by frequent opening and closing, prolongs the service life of the transmission components, and reduces the maintenance frequency.

[0014] The top end of the surface of the shaft rod is sleeved with a bearing seat, the surface of the bearing seat is connected with a plurality of supporting rods, and the other end of the supporting rods is connected with the inner wall of the protective shell.

[0015] By the bearing seat and the support structure of the support rod, the shaft rod is prevented from being offset or bent due to uneven force in the frequent opening and closing process, the coaxiality of the shaft rod and the planetary gear set is ensured, and the wear caused by the gear meshing deviation is reduced.

[0016] The auxiliary opening and closing assembly further comprises a hollow ring, the hollow ring is bolted to the bottom inside the protective shell, the bottom of the connecting shaft surface is sleeved with a shaft sleeve, both sides of the shaft sleeve are welded with connecting plates, the bottom of the connecting plate is bolted with a rotating part, both sides inside the hollow ring are rotationally connected with fixed cylinders, the inside of the fixed cylinder is slidably provided with a piston rod, the inside of the other end of the piston rod is slidably provided with an extension part, the other end of the extension part is connected with the rotating part, the rear side of the fixed cylinder is communicated with an oil channel, and the other end of the oil channel is communicated with the hollow ring.

[0017] By setting the auxiliary opening and closing assembly, when the ball valve is opened and closed, the controller sends a signal to the electric control valve first, the electric control valve opens the oil channel, high-pressure oil enters the inside of the fixed cylinder, pushes the piston rod to slide out along the fixed cylinder, the piston rod is connected with the rotating part through the extension part, the rotating part drives the connecting plate and the shaft sleeve to rotate with the piston rod, the shaft sleeve moves synchronously with the connecting shaft, provides auxiliary thrust for the connecting shaft, and according to the size of the medium resistance and the sealing pre-tightening force, the electric control valve adjusts the oil channel pressure to control the piston rod extension length, ensures that the auxiliary thrust accurately offsets the resistance, and after the opening and closing is completed, the electric control valve switches the oil channel direction, the oil flows back, the piston rod is retracted under the action of the oil pressure, and the initial state is restored, waiting for the next opening and closing instruction, the auxiliary thrust in the initial opening and closing stage can directly eliminate the sealing pre-tightening force, so that the servo motor only needs to overcome a small amount of medium resistance to drive the ball to rotate, avoids overheating or energy waste caused by the instantaneous torque of the motor being too high, adapts to the low-energy consumption requirement of frequent opening and closing, and in the low-temperature and high-viscosity medium working condition, the auxiliary thrust can break through the additional resistance, ensure the smooth rotation of the ball, avoid the jamming phenomenon, ensure the timely switching of the energy storage system liquid cooling pipeline and the electrolyte passage, and avoid system failure caused by switching delay.

[0018] The inside of the other end of the piston rod is hollow, the extension part comprises an extension rod, the extension rod is slidably arranged in the inside of the piston rod, a plurality of abutting pieces are annularly sleeved on the surface of the extension rod, and a wave-shaped piece is bolted between the abutting piece and the inner wall of the piston rod.

[0019] By setting the extension part, after the auxiliary thrust in the initial opening and closing stage eliminates the sealing pre-tightening force, the connecting shaft will continue to rotate under the drive of the motor, in order to ensure the normal rotation of the ball, the extension rod will continue to move in the piston rod, the normal rotation of the connecting shaft can be ensured, and the connection between the extension rod and the piston rod is ensured under the abutting action of the abutting piece and the wave-shaped piece.

[0020] The piston rod is further sleeved with a buffer spring, and the buffer spring is bolted to one side of the inner wall of the fixed cylinder.

[0021] The above technical scheme is adopted, the reset action of the buffer spring enables the piston rod to be quickly retracted, the opening and closing interval time is shortened, the high frequency requirement of frequent opening and closing is adapted, the switching efficiency of the energy storage ball valve is improved, the impact energy in the movement process can be absorbed, the rigid contact between the piston rod and the fixed cylinder is avoided, the component wear caused by frequent opening and closing is reduced, and the service life of the fixed cylinder and the piston rod is prolonged.

[0022] The anti-reverse assembly comprises a fixed ring, the surface of the fixed ring is bolted to the inner wall of the protective shell, the surface of the connecting shaft is sleeved with a locking disc and a pusher, the pusher is at the bottom of the locking disc, the surface of the locking disc is welded with a plurality of teeth, the front side and the rear side inside the fixed ring are rotationally connected with locking blocks, the other end of the locking block is between the adjacent two teeth, the pusher is used in cooperation with the locking block, the left side of the locking block is in contact with an elastic sheet, and the other side of the elastic sheet is welded with the fixed ring.

[0023] The above technical scheme is adopted, after the ball valve is opened and closed to the position, the connecting shaft stops rotating, the locking disc is static with the connecting shaft, the locking block rotates around the fixed ring under the elastic force of the elastic sheet, the end is embedded between the adjacent teeth of the locking disc, the locking disc and the connecting shaft are locked through mechanical engagement, and the valve stem is prevented from being reversed, when the ball valve is opened again, the servo motor drives the connecting shaft to rotate, the connecting shaft drives the pusher to rotate synchronously, the pusher extrudes the front locking block, the front locking block is separated from the teeth, the normal rotation of the connecting shaft is ensured, the rear locking block is embedded in the teeth under the elastic force of the elastic sheet, and locking is completed, when the ball valve is closed, the pusher moves reversely, the above steps are repeated, the rear locking block is separated from the teeth, and the front locking block is embedded in the teeth, the connecting shaft is locked, through the mechanical locking and the bidirectional protection structure design, the connecting shaft can be firmly locked after the ball valve is opened and closed to the position, the valve stem is prevented from being reversed due to fluid pressure impact and system vibration, and the bidirectional locking block ensures that the ball body can be stably locked at the two limit positions of opening and closing, and sealing failure or switching failure caused by position deviation after frequent opening and closing is avoided.

[0024] The two locking blocks are symmetrically arranged on the front side and the rear side inside the fixed ring, and the locking directions of the two locking blocks are oppositely arranged.

[0025] By adopting the technical scheme, when the ball rotates to the opening position, the rear locking block is embedded into the teeth under the action of the elastic sheet to lock the connecting shaft, and when the ball rotates to the closing position, the other locking block is embedded into the teeth to realize reverse locking.

[0026] The application further provides that the pushing piece comprises a synchronous disc, a pushing block is welded to the left surface of the synchronous disc, both ends of the pushing block are provided with inclined surface portions away from the synchronous disc, and a matching block is bolted to the bottom of the locking block.

[0027] By adopting the technical scheme, when the ball rotates to the opening position, the rear locking block is embedded into the teeth under the action of the elastic sheet to lock the connecting shaft, and when the ball rotates to the closing position, the other locking block is embedded into the teeth to realize reverse locking.

[0028] The application further provides that the top of the valve rod is provided with a mounting bracket, and the top of the mounting bracket is bolted to the protective shell.

[0029] By adopting the technical scheme, the mounting bracket provides stable support for the protective shell, avoids deviation of the protective shell due to its own weight or vibration of the driving mechanism in operation, ensures the coaxiality of the driving mechanism and the valve rod, and reduces the gear meshing deviation and the rotation resistance of the valve rod.

[0030] (Three) beneficial effects

[0031] Compared with the prior art, the application provides an energy storage ball valve low-torque driving structure suitable for frequent opening and closing conditions, which has the following beneficial effects:

[0032] The energy storage ball valve low-torque driving structure suitable for frequent opening and closing conditions is driven by the driving mechanism, and the driving mechanism is driven by the cooperation of the planetary gear transmission and the servo motor, which can solve the problems of large torque load, high energy consumption and serious wear of the traditional motor and worm gear transmission under the condition of frequent opening and closing. The multi-tooth meshing characteristics of the planetary gear set disperse the transmission load, greatly reduce the stress on a single tooth, and cooperate with the collaborative transmission of the inner tooth ring and the planet carrier to significantly improve the transmission efficiency and reduce the torque loss.

[0033] The auxiliary opening and closing assembly solves the problem of high instantaneous load of the motor caused by the superposition of the sealing pre-tightening force, medium resistance and impact resistance at the initial stage of opening and closing through the design of hydraulic auxiliary thrust. At the initial stage of opening and closing, the auxiliary opening and closing assembly is extended to provide auxiliary thrust for the connecting shaft, directly eliminating the sealing pre-tightening force of the ball and the valve seat, greatly reducing the torque demand of the motor at the time of starting, thereby ensuring the continuous stability during frequent opening and closing, and ensuring the timely switching of the liquid cooling pipeline and the electrolyte passage of the energy storage system.

[0034] The anti-reverse assembly can firmly lock the connecting shaft after the ball valve is opened and closed to the position through the structure design of mechanical locking and bidirectional protection, and resist the reverse rotation of the valve stem caused by fluid pressure impact and system vibration. The bidirectional locking block ensures that the ball can be stably locked at both the opening and closing limit positions, avoiding the sealing failure or passage switching failure caused by position deviation after frequent opening and closing. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure in the application;

[0036] Figure 2 It is a connection diagram of the protective shell and the driving mechanism in the application;

[0037] Figure 3 It is a connection diagram of the protective shell, the auxiliary opening and closing assembly and the connecting shaft in the application;

[0038] Figure 4 It is a local structure diagram of the auxiliary opening and closing assembly in the application;

[0039] Figure 5 It is a connection diagram of the extension and the piston rod in the application;

[0040] Figure 6 It is a connection diagram of the anti-reverse assembly and the connecting shaft in the application;

[0041] Figure 7 It is a connection diagram of the pushing piece and the locking block in the application.

[0042] In the figure: 1, ball; 2, valve stem; 3, protective shell; 4, servo motor; 5, driving mechanism; 51, shaft; 52, inner gear ring; 53, sun gear; 54, planet gear; 55, planet carrier; 56, connecting shaft; 57, auxiliary opening and closing assembly; 571, hollow ring; 572, shaft sleeve; 573, connecting plate; 574, rotating part; 575, fixed cylinder; 576, piston rod; 577, extension piece; 577a, extension rod; 577b, pressing piece; 577c, wave-shaped piece; 578, oil path; 58, anti-reverse assembly; 581, fixed ring; 582, pushing part; 582a, synchronous disc; 582b, pushing block; 582c, inclined surface part; 582d, matching block; 583, tooth; 584, locking block; 585, elastic piece; 586, locking disc; 6, sealing shell; 7, bearing seat; 8, supporting rod; 9, buffer spring; 10, mounting bracket. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0044] Please refer to Figures 1-7 A low-torque driving structure of an energy storage ball valve suitable for frequent opening and closing conditions, comprising a ball 1 and a valve stem 2 at the top, the top of the valve stem 2 is provided with a protective shell 3, the inside of the protective shell 3 is provided with a driving mechanism 5, the top of the inner wall of the protective shell 3 is bolted with a servo motor 4, and the output end of the servo motor 4 is bolted with the driving mechanism 5.

[0045] The driving mechanism 5 comprises a shaft 51, the top of the shaft 51 is connected with the output end of the servo motor 4, the inside of the protective shell 3 is connected with an inner ring gear 52, the inside of the inner ring gear 52 is rotatably connected with a sun gear 53, a plurality of planet gears 54 are connected between the sun gear 53 and the inner ring gear 52 in a meshing mode, the top and bottom of the plurality of planet gears 54 are rotatably connected with a planet carrier 55, the bottom of the bottom planet carrier 55 is connected with a connecting shaft 56, the bottom of the connecting shaft 56 is fixedly connected with the valve rod 2, the top of the top planet carrier 55 is connected with the shaft 51, the bottom end of the surface of the connecting shaft 56 is sleeved with an auxiliary opening and closing assembly 57 and an anti-reverse assembly 58, by arranging the driving mechanism 5, the driving mechanism 5 is used in cooperation with the planetary gear transmission and the driving of the servo motor 4, the problems of large torque load, high energy consumption and serious wear of the traditional motor and worm gear transmission under the frequent opening and closing condition can be solved, the multi-tooth meshing characteristics of the planetary gear set disperses the transmission load, greatly reduces the stress of a single tooth, cooperates with the cooperative transmission of the inner ring gear 52 and the planet carrier 55, significantly improves the transmission efficiency and reduces the torque loss; the auxiliary opening and closing assembly 57 solves the problem of high instantaneous load of the motor caused by the superposition of the sealing pre-tightening force, medium resistance and impact resistance in the initial opening and closing stage through the design of hydraulic auxiliary thrust, in the initial opening and closing stage, the auxiliary opening and closing assembly 57 is extended to provide auxiliary thrust for the connecting shaft 56, directly eliminating the sealing pre-tightening force of the ball 1 and the valve seat, greatly reducing the torque demand of the motor during starting, thereby guaranteeing the continuous stability during frequent opening and closing, ensuring the timely switching of the energy storage system liquid cooling pipeline and electrolyte passage; the anti-reverse assembly 58 can firmly lock the connecting shaft 56 after the ball valve is opened and closed to the position through the structural design of mechanical locking and bidirectional protection, resisting the reverse rotation of the valve rod 2 caused by fluid pressure impact and system vibration, and the bidirectional locking block 584 ensures that the ball 1 can be stably locked in both the opening and closing limit positions, avoiding the sealing failure or passage switching error caused by the position deviation after frequent opening and closing.

[0046] The top and bottom of the inner ring gear 52 are connected with a sealing shell 6, the bottom of the shaft 51 and the connecting shaft 56 penetrates the inside of the sealing shell 6, and the connection between the shaft 51 and the connecting shaft 56 and the sealing shell 6 is rotatably connected through a bearing, by arranging the sealing shell 6, the protective effect of the sealing shell 6 enables the planetary gear set to run in a clean and lubricated environment, reduces wear and failure caused by frequent opening and closing, prolongs the service life of the transmission components and reduces the maintenance frequency.

[0047] The top end of the surface of the shaft 51 is sleeved with a bearing seat 7, the surface of the bearing seat 7 is connected with a plurality of supporting rods 8, and the other end of the supporting rod 8 is connected with the inner wall of the protective shell 3, the supporting structure of the bearing seat 7 and the supporting rod 8 avoids the deflection or bending of the shaft 51 during frequent opening and closing due to uneven stress, ensures the coaxiality of the shaft 51 and the planetary gear set, and reduces the wear caused by gear meshing deviation.

[0048] The auxiliary opening and closing assembly 57 comprises a hollow ring 571 screwed in the bottom of the protective shell 3, the bottom of the surface of the connecting shaft 56 is sleeved with a shaft sleeve 572, both sides of the shaft sleeve 572 are welded with connecting plates 573, the bottom of the connecting plate 573 is screwed with a rotating piece 574, both sides of the inside of the hollow ring 571 are rotationally connected with fixed cylinders 575, the inside of the fixed cylinder 575 is slidably provided with a piston rod 576, the inside of the other end of the piston rod 576 is slidably provided with an extension piece 577, the other end of the extension piece 577 is connected with the rotating piece 574, the rear side of the fixed cylinder 575 is communicated with an oil channel 578, the other end of the oil channel 578 is communicated with the hollow ring 571, the oil channel 578 and the fixed cylinder 575 are communicated through an electric control valve, by arranging the auxiliary opening and closing assembly 57, when the ball valve is opened and closed, the controller sends a signal to the electric control valve first, the electric control valve opens the oil channel 578, high-pressure oil enters the inside of the fixed cylinder 575, pushes the piston rod 576 to slide out along the fixed cylinder 575, the piston rod 576 is connected with the rotating piece 574 through the extension piece 577, the rotating piece 574 drives the connecting plate 573 to rotate with the piston rod 576 extending out, the shaft sleeve 572 moves synchronously with the connecting shaft 56, provides auxiliary thrust for the connecting shaft 56, and according to the size of the medium resistance and the sealing pre-tightening force, the electric control valve adjusts the pressure of the oil channel 578 to control the extension length of the piston rod 576, ensures that the auxiliary thrust accurately offsets the resistance, and after the opening and closing is completed, the electric control valve switches the direction of the oil channel 578, the oil flows back, the piston rod 576 is retracted under the action of the oil pressure, and the initial state is restored, waiting for the next opening and closing instruction, the auxiliary thrust in the initial opening and closing stage can directly eliminate the sealing pre-tightening force, so that the servo motor 4 only needs to overcome a small amount of medium resistance to drive the ball body 1 to rotate, avoids overheating or energy waste caused by high instantaneous torque of the motor, adapts to the low-energy consumption requirement of frequent opening and closing, and in the low-temperature and high-viscosity medium working condition, the auxiliary thrust can break through the additional resistance, ensure the smooth rotation of the ball body 1, and avoid the phenomenon of jamming, protect the timely switching of the energy storage system liquid cooling pipeline and the electrolyte passage, and avoid system failure caused by switching delay.

[0049] The inside of the one end of the piston rod 576 close to the extension piece 577 is hollow, the extension piece 577 comprises an extension rod 577a, the extension rod 577a is slidably arranged in the inside of the piston rod 576, a plurality of abutting pieces 577b are annularly sleeved on the surface of the extension rod 577a, and wave-shaped pieces 577c are screwed between the abutting pieces 577b and the inner wall of the piston rod 576, by arranging the extension piece 577, after the auxiliary thrust in the initial opening and closing stage eliminates the sealing pre-tightening force, the connecting shaft 56 will continue to rotate under the drive of the motor, in order to protect the normal rotation of the ball body 1, the extension rod 577a will continue to move in the piston rod 576, which can ensure the normal rotation of the connecting shaft 56, and under the abutting action of the abutting pieces 577b and the wave-shaped pieces 577c, the connection between the extension rod 577a and the piston rod 576 is guaranteed.

[0050] The surface of the piston rod 576 is sleeved with a buffer spring 9, and the buffer spring 9 is bolted to the side close to the inner wall of the fixed cylinder 575. By arranging the buffer spring 9, the reset action of the buffer spring 9 makes the piston rod 576 quickly retract, shortens the opening and closing interval time, adapts to the high frequency requirement of frequent opening and closing, improves the switching efficiency of the energy storage ball valve, can absorb the impact energy in the movement process, avoids the rigid contact between the piston rod 576 and the fixed cylinder 575, reduces the component wear caused by frequent opening and closing, and prolongs the service life of the fixed cylinder 575 and the piston rod 576.

[0051] The anti-reverse assembly 58 includes a fixed ring 581, the surface of the fixed ring 581 is bolted to the inner wall of the protective shell 3, the surface of the connecting shaft 56 is sleeved with a locking disc 586 and a pusher 582, the pusher 582 is at the bottom of the locking disc 586, the surface of the locking disc 586 is welded with a plurality of teeth 583, the front side and the rear side inside the fixed ring 581 are rotationally connected with locking blocks 584, the other end of the locking block 584 is between the adjacent two teeth 583, the pusher 582 is used in cooperation with the locking block 584, the left side of the locking block 584 is in contact with an elastic sheet 585, and the other side of the elastic sheet 585 is welded with the fixed ring 581. By arranging the anti-reverse assembly 58, after the ball valve is opened and closed to the position, the connecting shaft 56 stops rotating, the locking disc 586 is static with the connecting shaft 56, the locking block 584 rotates around the fixed ring 581 under the elastic force of the elastic sheet 585, and the end is embedded between the adjacent teeth 583 on the locking disc 586. The locking disc 586 and the connecting shaft 56 are locked by mechanical engagement to prevent the valve stem 2 from reversing and opening the ball valve again. The connecting shaft 56 drives the pusher 582 to rotate synchronously, the pusher 582 extrudes the front locking block 584, the front locking block 584 is separated from the teeth 583, and the normal rotation of the connecting shaft 56 is ensured. The rear locking block 584 is embedded in the teeth 583 under the elastic force of the elastic sheet 585, and the locking is completed. When the ball valve is closed, the pusher 582 moves reversely, and the above steps are repeated to make the rear locking block 584 separate from the teeth 583, and the front locking block 584 is embedded in the teeth 583 to lock the connecting shaft 56. Through the mechanical locking and bidirectional protection structure design, the connecting shaft 56 can be firmly locked after the ball valve is opened and closed to the position, resist the reverse rotation of the valve stem 2 caused by fluid pressure impact and system vibration, and the bidirectional locking block 584 ensures that the ball 1 can be stably locked at the opening and closing limit positions, avoids the sealing failure or path switching failure caused by position deviation after frequent opening and closing.

[0052] Two locking blocks 584 are symmetrically arranged on the front and rear sides inside the fixed ring 581, and the locking directions of the two locking blocks 584 are oppositely arranged. The two symmetrically arranged locking blocks 584 correspond to the opening and closing positions of the ball 1 respectively. When the ball 1 rotates to the opening position, the rear locking block 584 is embedded in the tooth 583 under the action of the elastic sheet 585, and the connecting shaft 56 is locked. When the ball 1 rotates to the closing position, the locking block 584 on the other side is embedded in the tooth 583, and the reverse locking is realized. No matter which extreme position the ball 1 is in, the locking block 584 can provide stable locking force.

[0053] The pushing piece 582 includes a synchronous disc 582a, a pushing block 582b is welded on the left side of the surface of the synchronous disc 582a, and inclined surface parts 582c are arranged at both ends of the pushing block 582b and away from the synchronous disc 582a. A matching block 582d is bolted to the bottom of the locking block 584, and the side close to the inclined surface part 582c is matched with the inclined surface part 582c and in contact with the inclined surface part 582c. When the ball valve is opened and closed, the connecting shaft 56 drives the synchronous disc 582a and the pushing block 582b to rotate, the inclined surface parts 582c at both ends of the pushing block 582b are in contact with and extrude the matching block 582d, the matching block 582d is driven to rotate around the fixed ring 581 by the extrusion of the inclined surface, and the elastic sheet 585 is separated from the tooth 583 to realize unlocking. When the connecting shaft 56 continues to rotate, the pushing block 582b is separated from the matching block 582d, the opening and closing are completed, the connecting shaft 56 stops rotating, the pushing block 582b is static with the synchronous disc 582a, the locking block 584 is reset under the action of the elastic sheet 585, the end part is re-embedded in the tooth 583, the matching block 582d returns to the initial position, and waits for the next unlocking. The design of the inclined surface part 582c makes the contact between the pushing block 582b and the matching block 582d gradual extrusion, avoids damage caused by rigid collision, ensures that the locking block 584 stably separates from the tooth 583, and avoids unlocking jamming, and ensures smooth opening and closing process.

[0054] The top of the valve stem 2 is provided with a mounting bracket 10, and the top of the mounting bracket 10 is bolted with the protective shell 3. The mounting bracket 10 provides stable support for the protective shell 3, avoids deviation of the protective shell 3 due to its own weight or running vibration of the driving mechanism 5, ensures the coaxiality of the driving mechanism 5 and the valve stem 2, and reduces the gear meshing deviation and the rotation resistance of the valve stem 2.

[0055] The working principle of the embodiment is as follows: when the ball valve is opened, the controller first sends a signal to the electric control valve of the auxiliary opening and closing assembly 57, the electric control valve opens the oil passage 578, the high-pressure oil enters the inside of the two fixed cylinders 575 through the hollow ring 571, the oil pressure pushes the piston rod 576 to slide along the fixed cylinder 575 to extend, the piston rod 576 drives the rotating part 574 to move through the extension part 577, the rotating part 574 drives the connecting plate 573 and the shaft sleeve 572 to rotate synchronously, the shaft sleeve 572 drives the connecting shaft 56 to generate an initial rotation tendency, in this process, the auxiliary thrust directly acts on the connecting shaft 56, and the sealing pre-tightening force between the ball body 1 and the valve seat is quickly eliminated; after the sealing pre-tightening force is eliminated, the servo motor 4 outputs power, the shaft rod 51 drives the sun gear 53 to rotate through the top planetary gear 55, the sun gear 53 drives a plurality of planet gears 54 to rotate in the internal tooth ring 52, the planet gears 54 transmit the torque to the connecting shaft 56 through the bottom planetary gear 55, and the connecting shaft 56 drives the valve rod 2 and the ball body 1 to rotate synchronously; in the opening process, the pushing block 582b on the synchronous disc 582a rotates with it, the inclined surface part 582c at the front end of the pushing block 582b is in contact with the matching block 582d of the front locking block 584 and is gradually extruded, so that the front locking block 584 is forced to rotate around the fixed ring 581 to overcome the elastic force of the elastic sheet 585, the end part is separated from the teeth 583 of the locking disc, and the locking of the connecting shaft 56 is released; when the ball body 1 rotates to the completely opened position, the controller detects the position signal and stops the servo motor 4, the connecting shaft 56 and the locking disc 586 are synchronous and stationary, the rear locking block 584 is reset under the elastic force of the elastic sheet 585, the end part is embedded between the teeth 583 of the locking disc, and the connecting shaft 56 is locked through mechanical engagement, at the same time, the electric control valve of the auxiliary opening and closing assembly 57 switches the direction of the oil passage 578, the oil flows back, the piston rod 576 is quickly retracted into the fixed cylinder 575 under the reset force of the buffer spring 9, the extension part 577 is reset with the rotating part 574, and the whole driving structure completes the opening operation and keeps a stable locking state; when the ball valve is closed, the above steps are reversed.

[0056] The specific embodiment is only an explanation of the application, and is not a limitation of the application. Those skilled in the art can make modifications to the embodiment without creative contribution according to the needs after reading the specification, and it can be understood by those skilled in the art that the embodiments can be variously changed, modified, replaced and changed without departing from the principles and spirits of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions, comprising a ball (1) and a valve stem (2) at the top, characterized in that: The valve stem (2) is provided with a protective shell (3) at the top, and a drive mechanism (5) is provided inside the protective shell (3). A servo motor (4) is bolted to the top of the inner wall of the protective shell (3), and the output end of the servo motor (4) is bolted to the drive mechanism (5). The drive mechanism (5) includes a shaft (51), the top of which is bolted to the output end of a servo motor (4). An internal gear ring (52) is bolted inside the protective shell (3). A sun gear (53) is rotatably connected inside the internal gear ring (52). Several planet gears (54) mesh between the sun gear (53) and the internal gear ring (52). Planet carriers (55) are rotatably connected to the top and bottom of the several planet gears (54). A connecting shaft (56) is bolted to the bottom of the bottom planet carrier (55). The bottom of the connecting shaft (56) is fixedly connected to the valve stem (2). The top of the top planet carrier (55) is bolted to the shaft (51). An auxiliary opening and closing assembly (57) and an anti-reverse assembly (58) are sleeved on the bottom end of the surface of the connecting shaft (56).

2. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions as described in claim 1, characterized in that: The top and bottom of the internal gear ring (52) are both bolted with sealing shells (6), the bottom of the shaft (51) and the connecting shaft (56) both penetrate the interior of the sealing shell (6), and the connection between the shaft (51) and the connecting shaft (56) and the sealing shell (6) is rotatably connected by bearings.

3. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions as described in claim 1, characterized in that: The top end of the shaft (51) is fitted with a bearing seat (7), and several support rods (8) are bolted to the surface of the bearing seat (7), with the other end of the support rods (8) bolted to the inner wall of the protective shell (3).

4. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions according to claim 1, characterized in that: The auxiliary opening and closing assembly (57) includes a hollow ring (571), which is bolted to the bottom of the protective shell (3). A bushing (572) is sleeved on the bottom of the surface of the connecting shaft (56). A connecting plate (573) is welded to both sides of the bushing (572). A rotating part (574) is bolted to the bottom of the connecting plate (573). A fixed cylinder (575) is rotatably connected to both sides inside the hollow ring (571). A piston rod (576) is slidably arranged inside the fixed cylinder (575). An extension part (577) is slidably arranged inside the other end of the piston rod (576). The other end of the extension part (577) is connected to the rotating part (574). An oil passage (578) is connected to the rear side of the fixed cylinder (575). The other end of the oil passage (578) is connected to the hollow ring (571). The oil passage (578) and the fixed cylinder (575) are connected through an electric control valve.

5. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions according to claim 4, characterized in that: The piston rod (576) is hollow at the end near the extension member (577). The extension member (577) includes an extension rod (577a), which is slidably disposed inside the piston rod (576). Several pressure plates (577b) are annularly sleeved on the surface of the extension rod (577a), and a wave plate (577c) is bolted between the pressure plate (577b) and the inner wall of the piston rod (576).

6. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions according to claim 4, characterized in that: A buffer spring (9) is sleeved on the surface of the piston rod (576), and the buffer spring (9) is bolted to the side of the inner wall of the fixed cylinder (575).

7. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions according to claim 1, characterized in that: The anti-reverse assembly (58) includes a fixing ring (581), the surface of which is bolted to the inner wall of the protective shell (3). A locking disc (586) and a pusher (582) are sleeved on the surface of the connecting shaft (56). The pusher (582) is located at the bottom of the locking disc (586). Several teeth (583) are welded to the surface of the locking disc (586). Locking blocks (584) are rotatably connected to the front and rear sides inside the fixing ring (581). The other end of the locking block (584) is located between two adjacent teeth (583). The pusher (582) works in conjunction with the locking block (584). An elastic piece (585) contacts the left side of the locking block (584), and the other side of the elastic piece (585) is welded to the fixing ring (581).

8. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions according to claim 7, characterized in that: The two locking blocks (584) are symmetrically arranged on the front and rear sides inside the fixing ring (581), and the locking directions of the two locking blocks (584) are opposite.

9. A low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions as described in claim 7, characterized in that: The pusher (582) includes a synchronizing disk (582a), a pusher block (582b) is welded to the left side of the surface of the synchronizing disk (582a), and both ends of the pusher block (582b) are provided with inclined surfaces (582c) away from the synchronizing disk (582a). The bottom of the locking block (584) is bolted with a mating block (582d), and the side of the mating block (582d) near the inclined surface (582c) is adapted to the inclined surface (582c) and contacts the inclined surface (582c).

10. The low-torque drive structure for an energy storage ball valve suitable for frequent opening and closing conditions according to claim 1, characterized in that: The valve stem (2) is provided with a mounting bracket (10) at its top, and the top of the mounting bracket (10) is bolted to the protective shell (3).

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