A bidirectional speed-regulating hydraulic valve drive device

Abstract

The present invention discloses a bidirectional speed-regulating hydraulic valve drive device, comprising: a housing, an end cover, a one-way regulating valve, and an output shaft; a piston chamber is provided in the housing, the piston chamber being divided into a left piston chamber and a right piston chamber; a left chamber oil inlet and a right chamber oil inlet are also provided in the housing; the left end cover has a first oil inlet and a first oil outlet; the right end cover has a second oil inlet and a second oil outlet; the left chamber oil inlet is connected to the first oil inlet, and the first oil outlet is connected to the left piston chamber; the left one-way regulating valve is mounted in the first mounting hole, and the right one-way regulating valve is mounted in the second mounting hole; the left one-way regulating valve has a first oil inlet and a first oil outlet, and the right one-way regulating valve has a second oil inlet and a second oil outlet; the output shaft is disposed in the housing, and its end portion passes through the upper end cover and is disposed outside the housing; an output gear is fixed to the outside of the output shaft. The drive device of the present invention is easy to operate and can achieve bidirectional speed regulation.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic valves, and more particularly to a bidirectional speed-regulating hydraulic valve driving device. Background Art

[0002] The primary function of a hydraulic valve actuator is to drive the valve using hydraulic oil. Currently, existing hydraulic valve actuators lack speed regulation or rely on a throttle valve installed external to the valve body, such as in the oil line before or after the valve. This only regulates speed in one direction and cannot independently regulate the speed of the hydraulic valve actuator during both the opening and closing processes.

[0003] Therefore, it is an urgent problem for those skilled in the art to develop a bidirectional speed-adjustable hydraulic valve driving device that is easy to operate and can achieve bidirectional speed regulation. Summary of the Invention

[0004] In view of this, the present invention provides a bidirectional speed-adjustable hydraulic valve driving device which is easy to operate and can realize bidirectional speed regulation.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bidirectional speed-adjustable hydraulic valve driving device, comprising:

[0007] A housing, wherein a piston chamber is provided in the housing, wherein a piston is provided in the piston chamber, and wherein the piston divides the piston chamber into a left piston chamber and a right piston chamber; and wherein a left chamber oil inlet and a right chamber oil inlet are also provided in the housing;

[0008] End covers, the end covers include: a left end cover, a right end cover and an upper end cover; the left end cover and the right end cover are respectively arranged at the left and right ends of the housing, and the upper end cover is arranged on the top of the housing; the left end cover has a first oil inlet and a first oil outlet; the right end cover has a second oil inlet and a second oil outlet, the right chamber oil inlet is connected to the second oil inlet, and the second oil outlet is connected to the right chamber of the piston; the left chamber oil inlet is connected to the first oil inlet, and the first oil outlet is connected to the left chamber of the piston;

[0009] A one-way regulating valve, the one-way regulating valve comprising: a left one-way regulating valve and a right one-way regulating valve; a first mounting hole is formed inside the left end cover, and a second mounting hole is formed inside the right end cover; the left one-way regulating valve is mounted in the first mounting hole, and the right one-way regulating valve is mounted in the second mounting hole; the left one-way regulating valve has a first oil inlet hole and a first oil outlet hole, and the right one-way regulating valve has a second oil inlet hole and a second oil outlet hole; the first oil inlet hole is connected to the first oil inlet port, and the first oil outlet hole is connected to the first oil outlet port; the second oil inlet hole is connected to the second oil inlet port, and the second oil outlet hole is connected to the second oil outlet port;

[0010] An output shaft is placed in the housing, and its end passes through the upper end cover and is placed outside the housing; an output gear is fixed to the outside of the output shaft, a rack is provided in the middle of the piston, and the output gear is meshed with the rack.

[0011] The beneficial effect of adopting the above technical solution is that two oil inlets, a left chamber oil inlet and a right chamber oil inlet, are provided in the present invention. When hydraulic oil is injected into the left chamber oil inlet, the piston moves to the right and drives the output shaft to rotate clockwise. When hydraulic oil is injected into the right chamber oil inlet, the piston moves to the left and drives the output shaft to rotate counterclockwise, thereby realizing two-way speed regulation.

[0012] Preferably, a first threaded hole, a first annular convex cavity, a second annular convex cavity and a first throttling annular surface are sequentially provided in the first mounting hole of the left end cover from bottom to top; the first oil outlet is located at the first throttling annular surface, and the first oil inlet is located at the second annular convex cavity.

[0013] Preferably, a second threaded hole, a third annular convex cavity, a fourth annular convex cavity and a second throttling annular surface are sequentially provided in the second mounting hole of the right end cover from bottom to top; the second oil outlet is located at the second throttling annular surface, and the second oil inlet is located at the fourth annular convex cavity.

[0014] Preferably, the left one-way regulating valve is provided with a first threaded surface, a first sealing surface, a first throttling surface and a first one-way regulating component in sequence from bottom to top; the first threaded surface is in contact with the inner wall of the first threaded hole and is threadedly connected; the first sealing surface is placed in the first annular convex cavity and is in sealing contact with the inner wall of the first annular convex cavity; the first throttling surface is in contact with the first throttling annular surface, and the surface of the first throttling surface is provided with a first throttling groove; the first oil inlet is located between the first sealing surface and the first throttling surface, the first oil inlet is connected to the first oil channel, and the other end of the first oil channel is connected to the first oil outlet. By adjusting the contact length between the first throttling surface and the first throttling annular surface, the cross-section through which the hydraulic oil flows can be adjusted, thereby adjusting the flow rate of the return oil port, thereby adjusting the piston movement speed, and finally adjusting the output shaft speed.

[0015] Preferably, the first one-way adjustment component includes: a first steel ball, a first steel ball bushing, and a first steel ball spring; the first steel ball is located at one end of the first oil passage connecting to the first oil outlet, and blocks the first oil passage; a cavity is provided above the first steel ball, the first steel ball bushing and the first steel ball spring are both disposed within the cavity, and the first steel ball bushing is located between the first steel ball and the first steel ball spring. When hydraulic oil flows through the first oil passage, the hydraulic oil pushes the first steel ball upward, allowing the hydraulic oil to flow through; when hydraulic oil flows back through the first oil outlet, the hydraulic oil presses the first steel ball downward, blocking the first oil passage and preventing the hydraulic oil from passing through, thereby achieving one-way flow of the hydraulic oil.

[0016] Preferably, the right one-way regulating valve is provided with a second threaded surface, a second sealing surface, a second throttling surface and a second one-way regulating assembly from bottom to top; the second threaded surface contacts the inner wall of the second threaded hole and is threadedly connected; the second sealing surface is placed in the third annular convex cavity and is in sealing contact with the inner wall of the third annular convex cavity; the second throttling surface contacts the second throttling annular surface, and the surface of the second throttling surface is provided with a second throttling groove; the second oil inlet is located between the second sealing surface and the second throttling surface, the second oil inlet is connected to the second oil channel, and the other end of the second oil channel is connected to the second oil outlet. By adjusting the contact length between the second throttling surface and the second throttling annular surface, the cross-section through which the hydraulic oil flows can be adjusted, thereby adjusting the flow rate of the return oil port, and then adjusting the piston movement speed, and finally adjusting the output shaft speed.

[0017] Preferably, the second one-way adjustment assembly includes: a second steel ball, a second steel ball bushing, and a second steel ball spring; the second steel ball is located at one end of the second oil passage connecting to the second oil outlet and blocking the second oil passage; a cavity is provided above the second steel ball, the second steel ball bushing and the second steel ball spring are both disposed within the cavity, and the second steel ball bushing is located between the second steel ball and the second steel ball spring. When hydraulic oil flows through the second oil passage, the hydraulic oil pushes the second steel ball upward, allowing the hydraulic oil to flow through; when hydraulic oil flows back through the second oil outlet, the hydraulic oil pushes the second steel ball downward, blocking the second oil passage and preventing the hydraulic oil from passing through, thereby achieving one-way flow of the hydraulic oil.

[0018] Preferably, the left one-way regulating valve is provided with a first end plate at the bottom, the first end plate being located below the first threaded surface and fixedly connected to the left end cap; a first throttle valve nut is threadedly connected below the first end plate; a second end plate is provided with a second end plate at the bottom of the right one-way regulating valve, the second end plate being located below the second threaded surface and fixedly connected to the right end cap; a second throttle valve nut is threadedly connected below the second end plate. The left one-way regulating valve and the right one-way regulating valve are fixed to the left and right end caps respectively by the first and second end plates, and the contact length between the first throttle surface and the first throttle annular surface, and the contact length between the second throttle surface and the second throttle annular surface can be adjusted by adjusting the first throttle valve nut and the second throttle valve nut.

[0019] Preferably, a hand-liquid conversion mechanism is fixedly connected to the shell. When manual adjustment is performed, the hand-liquid conversion mechanism connects the left piston cavity and the right piston cavity; when hydraulic adjustment is performed, the hand-liquid conversion mechanism disconnects the left piston cavity and the right piston cavity.

[0020] Preferably, a transition gear is fixedly connected to the outside of the output shaft, and a manual gear is also provided in the housing. The manual gear is fixed with a hexagonal head, and the hexagonal head is placed outside the housing. The manual gear is meshed with the transition gear for transmission.

[0021] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides a bidirectional speed-adjustable hydraulic valve drive device, which has the following beneficial effects:

[0022] (1) In the present invention, the piston can be driven to move left or right through the two oil inlets of the left chamber and the right chamber, thereby realizing bidirectional speed regulation;

[0023] (2) By adjusting the contact length between the first throttle surface and the first throttle annular surface, and the contact length between the second throttle surface and the second throttle annular surface, the cross-section through which the hydraulic oil flows can be adjusted, thereby adjusting the flow rate of the oil return port, thereby adjusting the piston movement speed, and ultimately adjusting the output shaft speed; and the speed of the valve opening and closing process can be independently adjusted by the first one-way regulating valve and the second one-way regulating valve;

[0024] (3) The hand-hydraulic conversion mechanism can realize flexible switching between manual and hydraulic speed regulation, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the driving mechanism structure provided by the present invention;

[0027] Figure 2 A cross-sectional view of the housing provided by the present invention along the oil passage direction;

[0028] Figure 3 An internal cross-sectional view of the left end cover provided by the present invention;

[0029] Figure 4 An internal cross-sectional view of the right end cover provided by the present invention;

[0030] Figure 5 An internal cross-sectional view of the left one-way regulating valve provided by the present invention;

[0031] Figure 6 This is an internal sectional view of the right one-way regulating valve provided by the present invention.

[0032] Among them, in the figure,

[0033] 1- shell;

[0034] 11-piston; 12-piston left chamber; 13-piston right chamber; 14-left chamber oil inlet; 15-right chamber oil inlet;

[0035] 2-end cap;

[0036] 21-left end cover;

[0037] 211 - first oil inlet; 212 - first oil outlet; 213 - first mounting hole; 214 - first threaded hole; 215 - first annular convex cavity; 216 - second annular convex cavity; 217 - first throttling annular surface;

[0038] 22-right end cover;

[0039] 221 - second oil inlet; 222 - second oil outlet; 223 - second mounting hole; 224 - second threaded hole; 225 - third annular convex cavity; 226 - fourth annular convex cavity; 227 - second throttling annular surface;

[0040] 23-upper end cover;

[0041] 3-One-way regulating valve;

[0042] 31-left one-way regulating valve;

[0043] 311 - first oil inlet hole; 312 - first oil outlet hole; 313 - first threaded surface; 314 - first sealing surface; 315 - first throttle surface; 316 - first throttle groove; 317 - first oil channel; 318 - first steel ball; 319 - first steel ball bushing; 3110 - first steel ball spring; 3111 - first end plate; 3112 - first throttle valve nut;

[0044] 32-right one-way regulating valve;

[0045] 321-second oil inlet hole; 322-second oil outlet hole; 323-second threaded surface; 324-second sealing surface; 325-second throttling surface; 326-second throttling groove; 327-second oil channel; 328-second steel ball; 329-second steel ball bushing; 3210-second steel ball spring; 3211-second end plate; 3212-second throttle valve nut; 4-output gear; 5-hand-liquid conversion mechanism; 6-transition gear; 7-manual gear. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] The embodiment of the present invention discloses a bidirectional speed-adjustable hydraulic valve driving device, comprising:

[0048] The housing 1 has a piston chamber provided therein, wherein a piston 11 is provided in the piston chamber, and the piston 11 divides the piston chamber into a left piston chamber 12 and a right piston chamber 13; the housing 1 also has a left chamber oil inlet 14 and a right chamber oil inlet 15;

[0049] End cover 2, end cover 2 includes: left end cover 21, right end cover 22 and upper end cover 23; the left end cover 21 and the right end cover 22 are respectively arranged at the left and right ends of the shell 1, and the upper end cover 23 is arranged at the top of the shell 1; the left end cover 21 has a first oil inlet 211 and a first oil outlet 212; the right end cover 22 has a second oil inlet 221 and a second oil outlet 222, the right chamber oil inlet 15 is connected to the second oil inlet 221, and the second oil outlet 222 is connected to the right piston chamber 13; the left chamber oil inlet 14 is connected to the first oil inlet 211, and the first oil outlet 212 is connected to the left piston chamber 12;

[0050] The one-way regulating valve 3 includes: a left one-way regulating valve 31 and a right one-way regulating valve 32. A first mounting hole 213 is opened inside the left end cover 21, and a second mounting hole 223 is opened inside the right end cover 22. The left one-way regulating valve 31 is installed in the first mounting hole 213, and the right one-way regulating valve 32 is installed in the second mounting hole 223. The left one-way regulating valve 31 has a first oil inlet hole 311 and a first oil outlet hole 312, and the right one-way regulating valve 32 has a second oil inlet hole 321 and a second oil outlet hole 322. The first oil inlet hole 311 is connected to the first oil inlet port 211, and the first oil outlet hole 312 is connected to the first oil outlet port 212. The second oil inlet hole 321 is connected to the second oil inlet port 221, and the second oil outlet hole 322 is connected to the second oil outlet port 222.

[0051] The output shaft is placed inside the housing 1, with its end extending through the upper end cap 23 and positioned outside the housing 1. An output gear 4 is fixed to the outside of the output shaft, and a rack is provided in the middle of the piston 11, with the output gear 4 meshing with the rack. The piston 11 is a shaft-like structure, and the output gear 4 is connected to the output shaft via a key.

[0052] In order to further optimize the above technical solution, the first mounting hole 213 of the left end cover 21 is provided with a first threaded hole 214, a first annular convex cavity 215, a second annular convex cavity 216 and a first throttling annular surface 217 from bottom to top; the first oil outlet 212 is located at the first throttling annular surface 217, and the first oil inlet 211 is located at the second annular convex cavity 216.

[0053] In order to further optimize the above technical solution, the second mounting hole 223 of the right end cover 22 is provided with a second threaded hole 224, a third annular convex cavity 225, a fourth annular convex cavity 226 and a second throttling annular surface 227 from bottom to top; the second oil outlet 222 is located at the second throttling annular surface 227, and the second oil inlet 221 is located at the fourth annular convex cavity 226.

[0054] To further optimize the above technical solution, the left one-way regulating valve 31 is sequentially provided with a first threaded surface 313, a first sealing surface 314, a first throttling surface 315, and a first one-way regulating assembly from bottom to top. The first threaded surface 313 contacts and is threadedly connected to the inner wall of the first threaded hole 214. The first sealing surface 314 is positioned within the first annular convex cavity 215 and is in sealing contact with the inner wall of the first annular convex cavity 215. The first throttling surface 315 contacts the first throttling annular surface 217 and is provided with a first throttling groove 316. The first oil inlet hole 311 is located between the first sealing surface 314 and the first throttling surface 315. The first oil inlet hole 311 is connected to a first oil passage 317, the other end of which is connected to the first oil outlet hole 312. The sealing contact between the first sealing surface 314 and the first annular convex cavity 215 prevents hydraulic oil from leaking.

[0055] To further optimize the above technical solution, the first one-way adjustment assembly includes a first steel ball 318, a first steel ball bushing 319, and a first steel ball spring 3110. First steel ball 318 is located at the end of first oil passage 317 that connects to first oil outlet 312, blocking first oil passage 317. A cavity is defined above first steel ball 318, within which first steel ball bushing 319 and first steel ball spring 3110 are both disposed, with first steel ball bushing 319 positioned between first steel ball 318 and first steel ball spring 3110. Hydraulic oil pushes up first steel ball 318, compressing first steel ball spring 3110. When hydraulic oil is removed, first steel ball spring 3110 returns to its original position, and first steel ball 318 blocks first oil passage 317.

[0056] To further optimize the above technical solution, the right one-way regulating valve 32 is sequentially provided with a second threaded surface 323, a second sealing surface 324, a second throttling surface 325, and a second one-way regulating assembly from bottom to top. The second threaded surface 323 contacts and is threadedly connected to the inner wall of the second threaded hole 224. The second sealing surface 324 is positioned within the third annular convex cavity 225 and is in sealing contact with the inner wall of the third annular convex cavity 225. The second throttling surface 325 contacts the second throttling annular surface 227 and is provided with a second throttling groove 326. The second oil inlet hole 321 is located between the second sealing surface 324 and the second throttling surface 325. The second oil inlet hole 321 is connected to a second oil passage 327, the other end of which is connected to the second oil outlet hole 322. The sealing contact between the second sealing surface 324 and the third annular convex cavity 225 prevents hydraulic oil from leaking.

[0057] In order to further optimize the above technical solution, multiple first oil outlet holes 312 and second oil outlet holes 322 are evenly arranged along the circumferential direction; multiple first throttling grooves 316 and second throttling grooves 326 are evenly arranged outside the first throttling surface 315 and second throttling surface 325, and the first throttling grooves 316 and second throttling grooves 326 are triangular.

[0058] To further optimize the above technical solution, the second one-way adjustment assembly includes a second steel ball 328, a second steel ball bushing 329, and a second steel ball spring 3210. Second steel ball 328 is located at the end of second oil passage 327 that connects to second oil outlet 322, blocking second oil passage 327. A cavity is defined above second steel ball 328, within which second steel ball bushing 329 and second steel ball spring 3210 are both disposed, with second steel ball bushing 329 positioned between second steel ball 328 and second steel ball spring 3210. Hydraulic oil pushes up second steel ball 328, compressing second steel ball spring 3210. When hydraulic oil is depleted, second steel ball spring 3210 returns to its original position, and second steel ball 328 blocks second oil passage 327.

[0059] To further optimize the above technical solution, a first end plate 3111 is provided at the bottom of the left one-way regulating valve 31. The first end plate 3111 is located below the first threaded surface 313 and is fixedly connected to the left end cap 21. A first throttle valve nut 3112 is threadedly connected below the first end plate 3111. A second end plate 3211 is provided at the bottom of the right one-way regulating valve 32. The second end plate 3211 is located below the second threaded surface 323 and is fixedly connected to the right end cap 22. A second throttle valve nut 3212 is threadedly connected below the second end plate 3211. The first end plate 3111 is fixedly connected to the left end cap 21 by screws, and the second end plate 3211 is fixedly connected to the right end cap 22 by screws.

[0060] In order to further optimize the above technical solution, a hand-liquid conversion mechanism 5 is fixedly connected to the housing 1. When manual adjustment is performed, the hand-liquid conversion mechanism 5 connects the left piston chamber 12 and the right piston chamber 13; when hydraulic adjustment is performed, the hand-liquid conversion mechanism 5 disconnects the left piston chamber 12 and the right piston chamber 13.

[0061] To further optimize the above technical solution, a transition gear 6 is fixedly connected to the outside of the output shaft. A manual gear 7 is also provided within the housing 1. The manual gear 7 is fixed with a hexagonal head. The hexagonal head is placed on the outside of the housing 1. The manual gear 7 meshes with the transition gear 6 for transmission. The hexagonal head and the manual gear 7 are connected by a rotating shaft, which is rotatably connected to the housing 1. The valve can be opened and closed by rotating the output shaft.

[0062] Working process:

[0063] (1) When hydraulic operation is in progress, adjust the handle on the hand-liquid conversion mechanism 5 to switch to the "manual" state. At this time, the hand-liquid conversion mechanism 5 disconnects the piston left chamber 12 and the piston right chamber 13 ports. When the right chamber oil inlet 15 is connected to the external oil source pressure oil port and the left chamber oil inlet 14 is connected to the return oil port, the hydraulic oil enters the cavity of the right end cover 11 through the right chamber oil inlet 15 and the second oil inlet 221. Most of the hydraulic oil in the cavity enters the second oil channel 327 through the second oil inlet hole 321 of the right one-way throttle valve 32. Under the action of oil pressure, the second steel ball 328 is pushed open and enters the piston right chamber 13 from the second oil outlet 322 through the second oil outlet 222, pushing the piston. When the piston 11 moves leftward, the oil in the left chamber 12 enters the cavity of the left end cover 21 through the first oil outlet 212 of the left end cover 21. Due to the elastic force of the first steel ball spring 3110 of the left one-way throttle valve 31, the first steel ball 318 blocks the first oil channel 317. The hydraulic oil can only flow through the first throttle groove 316 between the first throttle surface 315 and the first throttle annular surface 217, through the first oil inlet 211 and the left chamber oil inlet 14, and then to the external oil return port. By adjusting the first throttle valve nut 3112, the contact length between the first throttle surface 315 and the first throttle annular surface 217 can be adjusted, thereby adjusting the cross-section of the hydraulic oil flow and adjusting the flow rate of the oil return port. Because the rack on the piston 11 is engaged with the output gear 4, when the piston 11 moves leftward, it drives the output shaft to rotate counterclockwise. By adjusting the flow rate of the hydraulic oil in the oil return port, the piston 11 can be adjusted to a certain speed, and ultimately the rotation speed of the output shaft can be adjusted.

[0064] Similarly, when the left chamber oil inlet 14 is connected to the external oil source pressure oil port and the right chamber oil inlet 15 is connected to the return oil port, the piston 11 moves to the right, driving the output gear 4 to rotate clockwise. By adjusting the contact length between the second throttle surface 325 and the second throttle annular surface 227, the cross-section through which the hydraulic oil flows is adjusted, thereby adjusting the flow rate of the return oil port; ultimately, the output shaft rotation speed is adjusted.

[0065] 2) When operating manually, adjust the handle on the hand-liquid conversion mechanism 5 and switch it to the "manual" state. At this time, the hand-liquid conversion mechanism 5 connects the ports of the left piston chamber 12 and the right piston chamber 13. The hydraulic oil pressure in the left piston chamber 12 and the right piston chamber 13 are consistent. When the hexagonal head is turned clockwise, the manual gear 7 rotates clockwise. Since the manual gear 7 is engaged with the transition gear 6, the transition gear 6 rotates counterclockwise, driving the output shaft to rotate counterclockwise. At the same time, the output gear 4 rotates counterclockwise and drives the piston 11 to the left. Similarly, when the manual gear shaft is turned counterclockwise, it drives the output shaft to rotate clockwise, and the piston 11 moves to the right. The rotation of the manual gear 7 finally drives the output shaft to rotate, realizing the opening and closing of the valve.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bidirectional speed-adjustable hydraulic valve drive device, characterized in that: include: A housing (1), wherein a piston chamber is provided in the housing (1), wherein a piston (11) is provided in the piston chamber, and wherein the piston (11) divides the piston chamber into a left piston chamber (12) and a right piston chamber (13); and further provided in the housing (1) are a left chamber oil inlet (14) and a right chamber oil inlet (15); End cover (2), the end cover (2) comprising: a left end cover (21), a right end cover (22) and an upper end cover (23); the left end cover (21) and the right end cover (22) are respectively arranged at the left and right ends of the shell (1), and the upper end cover (23) is arranged on the top of the shell (1); the left end cover (21) has a first oil inlet (211) and a first oil outlet (212); the right end cover (22) has a second oil inlet (221) and a second oil outlet (222); the right chamber oil inlet (15) is communicated with the second oil inlet (221), and the second oil outlet (222) is communicated with the The right chamber (13) of the piston is in communication; the left chamber oil inlet (14) is in communication with the first oil inlet (211), and the first oil outlet (212) is in communication with the left chamber (12) of the piston; a first threaded hole (214), a first annular convex cavity (215), a second annular convex cavity (216), and a first throttling annular surface (217) are sequentially provided in the first mounting hole (213) of the left end cover (21) from bottom to top; the first oil outlet (212) is located at the first throttling annular surface (217), and the first oil inlet (211) is located at the second annular convex cavity (216); A one-way regulating valve (3), comprising: a left one-way regulating valve (31) and a right one-way regulating valve (32); a first mounting hole (213) is provided inside the left end cover (21), and a second mounting hole (223) is provided inside the right end cover (22); the left one-way regulating valve (31) is installed in the first mounting hole (213), and the right one-way regulating valve (32) is installed in the second mounting hole (223); the left one-way regulating valve (31) has a first oil inlet hole (311) and a first oil outlet hole (312), and the right one-way regulating valve (32) has a second oil inlet hole (321) and a second oil outlet hole (322); the first oil inlet hole (311) and the second oil outlet hole (322) are connected. The first oil inlet (211) is in communication with the first oil outlet (312); the second oil inlet (321) is in communication with the second oil inlet (221), and the second oil outlet (322) is in communication with the second oil outlet (222); the left one-way regulating valve (31) is provided with a first threaded surface (313), a first sealing surface (314), a first throttling surface (315) and a first one-way regulating component from bottom to top; the first threaded surface (313) contacts and is threadedly connected to the inner wall of the first threaded hole (214); the first sealing surface (314) is placed in the first annular convex cavity (215) and is in contact with the first annular convex cavity (215). The inner wall of the cavity (215) is in sealing contact; the first throttling surface (315) is in contact with the first throttling annular surface (217); the surface of the first throttling surface (315) is provided with a first throttling groove (316); the first oil inlet hole (311) is located between the first sealing surface (314) and the first throttling surface (315); the first oil inlet hole (311) is connected to a first oil passage (317); the other end of the first oil passage (317) is connected to the first oil outlet hole (312); the first one-way adjustment component includes: a first steel ball (318), a first steel ball bushing (319) and a first steel ball spring (3110); the first steel ball (318) is located in the first oil passage (317) ) is connected to one end of the first oil outlet hole (312) and blocks the first oil passage (317); a cavity is provided above the first steel ball (318); the first steel ball bushing (319) and the first steel ball spring (3110) are both provided in the cavity, and the first steel ball bushing (319) is located between the first steel ball (318) and the first steel ball spring (3110); a first end plate (3111) is provided at the bottom of the left one-way regulating valve (31), the first end plate (3111) is located below the first threaded surface (313) and is fixedly connected to the left end cover (21); a first throttle valve nut (3112) is threadedly connected below the first end plate (3111); An output shaft is placed in the housing (1), and its end passes through the upper end cover (23) and is placed outside the housing (1); an output gear (4) is fixed to the outside of the output shaft, a rack is provided in the middle of the piston (11), and the output gear (4) is meshed with the rack.

2. A bidirectional speed-adjustable hydraulic valve driving device according to claim 1, characterized in that: A second threaded hole (224), a third annular convex cavity (225), a fourth annular convex cavity (226) and a second throttling annular surface (227) are sequentially provided in the second mounting hole (223) of the right end cover (22) from bottom to top; the second oil outlet (222) is located at the second throttling annular surface (227), and the second oil inlet (221) is located at the fourth annular convex cavity (226).

3. The bidirectional speed-adjustable hydraulic valve driving device according to claim 2, characterized in that: The right one-way regulating valve (32) is provided with a second threaded surface (323), a second sealing surface (324), a second throttling surface (325) and a second one-way regulating assembly in sequence from bottom to top; the second threaded surface (323) contacts and is threadedly connected to the inner wall of the second threaded hole (224); the second sealing surface (324) is placed in the third annular convex cavity (225) and is in sealing contact with the inner wall of the third annular convex cavity (225); the second throttling surface (325) contacts the second throttling annular surface (227), and a second throttling groove (326) is provided on the surface of the second throttling surface (325); the second oil inlet hole (321) is located between the second sealing surface (324) and the second throttling surface (325), the second oil inlet hole (321) is connected to a second oil channel (327), and the other end of the second oil channel (327) is connected to the second oil outlet hole (322).

4. A bidirectional speed-adjustable hydraulic valve driving device according to claim 3, characterized in that: The second one-way adjustment component comprises: a second steel ball (328), a second steel ball bushing (329) and a second steel ball spring (3210); the second steel ball (328) is located at one end of the second oil passage (327) communicating with the second oil outlet hole (322), and blocks the second oil passage (327); a cavity is provided above the second steel ball (328); the second steel ball bushing (329) and the second steel ball spring (3210) are both provided in the cavity, and the second steel ball bushing (329) is located between the second steel ball (328) and the second steel ball spring (3210).

5. The bidirectional speed-adjustable hydraulic valve driving device according to claim 3, characterized in that: A second end plate (3211) is provided at the bottom of the right one-way regulating valve (32). The second end plate (3211) is located below the second threaded surface (323) and is fixedly connected to the right end cover (22). A second throttle valve nut (3212) is threadedly connected below the second end plate (3211).

6. The bidirectional speed-adjustable hydraulic valve driving device according to claim 1, characterized in that: A hand-liquid conversion mechanism (5) is fixedly connected to the housing (1). When manual adjustment is performed, the hand-liquid conversion mechanism (5) connects the left piston chamber (12) and the right piston chamber (13); when hydraulic adjustment is performed, the hand-liquid conversion mechanism (5) disconnects the left piston chamber (12) and the right piston chamber (13).

7. The bidirectional speed-adjustable hydraulic valve driving device according to claim 6, characterized in that: The output shaft is fixedly connected to a transition gear (6) on the outside, and a manual gear (7) is also provided in the housing (1). The manual gear (7) is fixed with a hexagonal head, and the hexagonal head is placed outside the housing (1). The manual gear (7) and the transition gear (6) are meshed and transmitted.

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