Valve driving device and valve

Abstract

The invention discloses a valve driving device and a valve. The valve driving device comprises a cylinder body, a first driving assembly and a second driving assembly. The cylinder body comprises a containing cavity and a medium flow channel communicated with the containing cavity. The first driving assembly comprises a driving rod, a piston and a first transmission mechanism, at least part of the driving rod is arranged in the containing cavity in a penetrating mode and used for being connected to a valve rod of the valve, at least part of the piston is arranged on the driving rod in a sleeving mode, and the piston is connected with the driving rod through the first transmission mechanism. The second driving assembly comprises an operating part, a driving part and a second transmission mechanism, the driving part is connected with the piston, and the operating part and the driving part are connected through the second transmission mechanism. The first driving assembly capable of automatically changing the working state of the valve and the second driving assembly facilitating manual adjustment of the working state of the valve by an operator are arranged, and it can be guaranteed that the operator can manually change the working state of the valve under the condition that an automatic control means fails or does not have working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a valve driving device and a valve. Background Art

[0002] Most existing valves are equipped with a drive device to change the working state of the valve. The drive device generally uses hydraulic control or pneumatic control to achieve automatic control of the working state of the valve. However, when the automatic control means fail or the operating conditions are not met, it is difficult to change the working state of the valve by manual operation. In particular, when the valve is used in an underwater environment, once the automatic control means of the valve fail, the underwater environment makes it more difficult for underwater operators to change the working state of the valve.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a valve driving device, which is used to solve the problem of single driving means of the existing valve driving device.

[0005] In order to achieve the above-mentioned object, a specific embodiment of the present invention provides a valve drive device, which includes a cylinder body, a first drive assembly and a second drive assembly. The cylinder body includes a receiving chamber and a medium flow channel connected to the receiving chamber. The first drive assembly includes a drive rod, a piston and a first transmission mechanism, the drive rod is at least partially inserted into the receiving chamber and used to connect to the valve stem of the valve, the piston is at least partially sleeved on the drive rod, and the piston and the drive rod are connected through the first transmission mechanism. The second drive assembly includes an operating member, a drive member and a second transmission mechanism, the drive member is connected to the piston, and the operating member and the drive member are connected through the second transmission mechanism. When the medium is input or output to the inside of the receiving chamber through the medium flow channel, the piston can be driven to move linearly along the drive rod. When the operating member is screwed, the rotational motion of the operating member can be converted into the linear motion of the piston along the drive rod through the second transmission mechanism. When the piston moves linearly along the drive rod, the linear motion of the piston can be converted into the rotational motion of the drive rod through the first transmission mechanism, so that the drive rod drives the valve stem of the valve to rotate.

[0006] In one or more embodiments of the present invention, the driving member is supported against the piston along the axial direction of the piston, and the second transmission mechanism includes a first thread and a second thread, the first thread and the second thread are threadedly matched, one of the first thread and the second thread is provided on the driving member, and the other is provided on the operating member.

[0007] In one or more embodiments of the present invention, the second driving assembly further includes a second anti-rotation mechanism for limiting the rotation of the driving member.

[0008] In one or more embodiments of the present invention, a threaded hole for the operating member to pass through is formed on the driving member, the first thread is arranged on the circumferential outer wall of the driving member, and the second thread is arranged on the circumferential hole wall of the threaded hole.

[0009] In one or more embodiments of the present invention, the valve driving device comprises a fixed cover body, and a through hole is formed on the cover body for the driving member to pass through.

[0010] In one or more embodiments of the present invention, the second anti-rotation mechanism includes a second anti-rotation protrusion and a second anti-rotation groove that are plug-fitted together, one of the second anti-rotation protrusion and the second anti-rotation groove is arranged on the circumferential outer wall of the driving member, and the other is arranged on the circumferential hole wall of the through hole, and the second anti-rotation groove extends in a direction parallel to the axial direction of the through hole.

[0011] In one or more embodiments of the present invention, the valve driving device further comprises a housing covered on the cylinder body, the driving rod and the piston are at least partially accommodated in the housing, and the cover body is mounted on the housing.

[0012] In one or more embodiments of the present invention, the valve driving device further includes a flange facing the through hole and mounted on the cover body.

[0013] In one or more embodiments of the present invention, the operating member includes a knob portion located outside the housing and a shaft portion connected to the knob portion, and the shaft portion passes through the flange and is disposed in the through hole of the cover body.

[0014] In one or more embodiments of the present invention, the shaft portion includes a first shaft segment passing through the through hole of the cover body and a second shaft segment passing through the flange and connected to the knob portion, and the second shaft segment is made of corrosion-resistant material.

[0015] In one or more embodiments of the present invention, a radially protruding second stopper is provided on the shaft, a third stopper is formed in the through hole, and the third stopper and the flange respectively abut against both sides of the second stopper along the axial direction of the shaft.

[0016] In one or more embodiments of the present invention, the first transmission mechanism includes a plug-in fitting spiral groove and a transmission member, wherein the spiral groove extends spirally in a direction parallel to the axial direction of the piston, one of the spiral groove and the transmission member is arranged on the piston, and the other is arranged on the drive rod.

[0017] In one or more embodiments of the present invention, the valve driving device further comprises a first seat body which is fixed in position and sleeved on the piston.

[0018] In one or more embodiments of the present invention, the first drive assembly further includes a first anti-rotation mechanism for limiting the rotation of the piston.

[0019] In one or more embodiments of the present invention, the first anti-rotation mechanism includes a first anti-rotation protrusion and a first anti-rotation groove that are plug-fitted together, one of the first anti-rotation protrusion and the first anti-rotation groove is arranged on the circumferential outer wall of the piston, and the other is arranged on the circumferential inner wall of the first seat body, and the first anti-rotation groove extends in a direction parallel to the axial direction of the piston.

[0020] Another aspect of the present invention provides a valve, which includes the valve driving device mentioned above.

[0021] Compared with the prior art, the present invention provides a first drive component that can automatically change the working state of the valve and a second drive component that facilitates the operator to manually adjust the working state of the valve. When the automatic control means fails or the operating conditions are not met, it can also ensure that the operator can manually change the working state of the valve.

[0022] In addition, the second drive assembly is extremely convenient to operate, has high transmission efficiency, and has strong structural stability, and each component can still maintain a stable transmission relationship after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A three-dimensional structural diagram of a valve in one embodiment of the present invention;

[0025] Figure 2 is a cross-sectional structural diagram of a valve in one embodiment of the present invention;

[0026] Figure 3 is a cross-sectional structural diagram of a second driving assembly in one embodiment of the present invention;

[0027] Figure 4 An exploded structural diagram of an operating member and a driving member in one embodiment of the present invention;

[0028] Figure 5 A three-dimensional structural diagram of a driving rod and a piston in one embodiment of the present invention;

[0029] Figure 6 It is a cross-sectional structural diagram of a driving rod, a piston and a first seat body in one embodiment of the present invention.

[0030] Description of main reference numerals: 1. cylinder body, 11. accommodating chamber, 12. medium flow channel, 2. first driving assembly, 21. driving rod, 211. transmission member, 22. piston, 221. spiral groove, 222. first anti-rotation protrusion, 23. first seat body, 231. first anti-rotation groove, 24. second seat body, 25. reset elastic member, 26. first stopper, 3. second driving assembly, 31. operating member, 311. knob portion, 312. Shaft, 3121. First shaft section, 3122. Second shaft section, 3123. Second stop portion, 32. Driving member, 321. Threaded hole, 322. Second anti-rotation protrusion, 4. Shell, 5. Cover body, 51. Through hole, 52. Second anti-rotation groove, 53. Third stop portion, 6. Flange, 7. Pressure balancer, 8. Pointer assembly, 81. Pointer, 9. Valve body, 91. Valve seat, 92. Valve plate, 93. Valve stem. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 creative work should fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "top", "bottom", "upper", "lower", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "second" and "first" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "second" and "first" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In one embodiment, referring to Figures 1 to 6 As shown, this embodiment provides a valve driving device, which is generally used in underwater environments to control the working state of valves in the underwater environment.

[0035] The valve driving device comprises a cylinder body 1, a shell 4 and a cover 5. The two opposite ends of the shell 4 are both provided with openings. The opening at one end of the shell 4 is covered on the cylinder body 1, and the cover 5 is installed at the opening at the other end. The cylinder body 1 is relatively close to the valve body 9 of the valve, or is directly fixedly connected to the valve body 9 of the valve.

[0036] The valve drive device also includes a first drive assembly 2 and a second drive assembly 3. The first drive assembly 2 is installed inside the cylinder body 1 and the housing 4. The operator can control the piston 22 and the drive rod 21 of the first drive assembly 2 to perform corresponding actions by adjusting the medium pressure inside the cylinder body 1, thereby changing the working state of the valve and realizing automatic control of the working state of the valve. The above medium is generally liquid or gas, such as hydraulic oil or compressed air. The operating member 31 of the second drive assembly 3 is at least partially located outside the cylinder body 1. The operator can operate the operating member 31 outside the cylinder body 1 to control the piston 22 and the drive rod 21 of the first drive assembly 2 to perform corresponding actions, thereby changing the working state of the valve and realizing manual control of the working state of the valve. In the case where the operator cannot adjust the medium pressure inside the cylinder body 1, the operator is provided with an additional valve control means.

[0037] In one embodiment, referring to Figure 2 and Figure 5 As shown, the first drive assembly 2 includes a drive rod 21, a piston 22 and a first transmission mechanism. A portion of the drive rod 21 and the piston 22 is located in the accommodating chamber 11 of the cylinder body 1, and the other portion penetrates the housing 4 and extends to a position close to the cover body 5. The end of the drive rod 21 away from the cover body 5 is used to connect to the valve stem 93 of the valve, and then can transmit its own rotational motion to the valve stem 93 to drive the valve stem 93 to rotate, thereby changing the working state of the valve. The piston 22 is sleeved on the drive rod 21. When the medium is input or output to the inside of its accommodating chamber 11 through the medium flow channel 12 on the cylinder body 1, the medium pressure in the accommodating chamber 11 can be changed, thereby driving the piston 22 to move linearly along the drive rod 21. When the piston 22 moves linearly along the drive rod 21, the linear motion of the piston 22 can be converted into the rotational motion of the drive rod 21 through the first transmission mechanism, thereby causing the drive rod 21 to drive the valve stem 93 of the valve to rotate, thereby changing the working state of the valve.

[0038] Since the first transmission mechanism has the function of converting linear motion into rotational motion, the first transmission mechanism can theoretically be a rack and pinion mechanism, a ball screw mechanism, a crank slider mechanism, a screw transmission mechanism, a cam mechanism or a pulley mechanism.

[0039] In one embodiment, referring to Figure 2 and Figure 5As shown, based on comprehensive considerations of transmission efficiency, transmission accuracy and transmission difficulty, the first transmission mechanism uses a spiral transmission mechanism. Specifically, the first transmission mechanism includes a plug-in spiral groove 221 and a transmission member 211, the spiral groove 221 is provided on the inner peripheral wall of the piston 22, the axial direction of the spiral groove 221 is substantially parallel to the axial direction of the piston 22, the transmission member 211 is provided on the peripheral wall of the transmission rod, and is inserted into the spiral groove 221 substantially along the radial direction of the drive rod 21.

[0040] Furthermore, the piston 22 is restricted by the first anti-rotation mechanism and cannot perform rotational motion, but can only perform linear motion along the driving rod 21 .

[0041] When the piston 22 makes a linear motion along the driving rod 21, under the guidance of the spiral groove 221, the transmission member 211 has a movement tendency to move along the spiral groove 221. Since the piston 22 cannot rotate, the spiral groove 221 drives the transmission member 211 to rotate. The transmission member 211 transmits its own rotational motion to the driving rod 21. The driving rod 21 rotates synchronously with the transmission member 211. The driving rod 21 finally drives the valve stem 93 to rotate synchronously with it, thereby changing the working state of the valve.

[0042] It should be noted that the positions of the spiral groove 221 and the transmission member 211 in the above embodiments are conventional choices in practical applications. For those skilled in the art, without departing from the technical principles of the present application, the positions of the spiral groove 221 and the transmission member 211 are swapped, that is, the spiral groove 221 is set on the drive rod 21, and the transmission member 211 is set on the piston 22, which should also be regarded as the scope of protection of the present application.

[0043] In one embodiment, referring to Figure 5 As shown, in order to facilitate the assembly of the driving rod 21 and the piston 22, the spiral groove 221 penetrates the peripheral wall of the piston 22, and a hole for inserting the transmission member 211 is provided at a corresponding position of the peripheral wall of the driving rod 21. When installing, the driving rod 21 and the piston 22 can be sleeved together first, and then installed from the outside of the piston 22 to the transmission member 211 into the hole on the peripheral wall of the transmission member 211.

[0044] In one embodiment, referring to Figure 2 As shown, in order to facilitate the reset of the piston 22 after movement, the first driving assembly 2 also includes a first seat body 23, a second seat body 24 and a reset elastic member 25 installed in the housing 4. The reset elastic member 25 is arranged between the first seat body 23 and the second seat body 24. The first seat body 23 is sleeved on the piston 22 and abuts against the inner end surface of the cylinder body 1. The second seat body 24 is arranged close to the inner end surface of the cover body 5. The piston 22 is provided with a radially protruding first stopper 26, which is constructed as an annular structure, and the first stopper 26 abuts against the end surface of the second seat body 24 close to the housing 4.

[0045] When the medium pressure in the accommodating chamber 11 inside the cylinder body 1 changes, the piston 22 moves toward the valve, and the piston 22 drives the second seat 24 to move synchronously through the first stopper 26 to squeeze the reset elastic member 25. When the medium pressure in the accommodating chamber 11 inside the cylinder body 1 returns to the original level, the reset elastic member 25 rebounds and drives the piston 22 to move toward the cover body 5.

[0046] Optionally, the resetting elastic member 25 is a spring.

[0047] In one embodiment, referring to Figure 2 and Figure 5 As shown, the first anti-rotation mechanism includes a plug-in first anti-rotation protrusion 222 and a first anti-rotation groove 231. The first anti-rotation protrusion 222 is arranged on the outer periphery of the piston 22 and extends approximately along the radial direction of the piston 22. The first seat body 23 is fixedly covered on the cylinder body 1, and the first anti-rotation groove 231 is opened on the inner peripheral wall of the first seat body 23 and extends approximately along the direction parallel to the axial direction of the piston 22 to provide axial movement space for the first anti-rotation protrusion 222 and limit the rotation of the first anti-rotation protrusion 222, thereby limiting the rotation of the piston 22.

[0048] It should be noted that the positions of the first anti-rotation protrusion 222 and the first anti-rotation groove 231 in the above embodiments are conventional choices in practical applications. For those skilled in the art, without departing from the technical principles of the present application, the positions of the first anti-rotation protrusion 222 and the first anti-rotation groove 231 are swapped, that is, the first anti-rotation protrusion 222 is arranged on the first seat body 23, and the first anti-rotation groove 231 is arranged on the piston 22, which should also be regarded as the protection scope of the present application.

[0049] In one embodiment, referring to Figures 2 to 4 As shown, the second drive assembly 3 includes an operating member 31, a driving member 32 and a second transmission mechanism. The operating member 31 is located outside the cylinder 1 and the housing 4, and the driving member 32 is connected to the piston 22. The operating member 31 and the driving member 32 are connected through the second transmission mechanism.

[0050] The second transmission mechanism has the function of converting rotational motion into linear motion. When the operator turns the operating member 31, the second transmission mechanism can convert the rotational motion of the operating member 31 into linear motion of the driving member 32 along the axial direction of the piston 22, thereby driving the piston 22 to move linearly along the driving rod 21, and finally making the valve stem 93 of the valve rotate synchronously with the driving rod 21, thereby changing the working state of the valve.

[0051] Since the second transmission mechanism has the function of converting rotational motion into linear motion, the second transmission mechanism can theoretically also be a rack and pinion mechanism, a ball screw mechanism, a crank slider mechanism, a screw transmission mechanism, a cam mechanism or a pulley mechanism.

[0052] In one embodiment, referring to Figures 2 to 4 As shown, based on comprehensive considerations of transmission efficiency, transmission accuracy, transmission difficulty and operating difficulty, the second transmission mechanism uses a spiral transmission mechanism. Specifically, a threaded hole 321 is formed on the driving member 32 for the operating member 31 to pass through, and the operating member 31 is inserted into the threaded hole 321. The second transmission mechanism includes a first thread and a second thread, the first thread is an external thread, the second thread is an internal thread, the first thread and the second thread are threadedly matched, the first thread is arranged on the circumferential outer wall of the operating member 31, and the second thread is arranged on the circumferential hole wall of the threaded hole 321 of the driving member 32.

[0053] Furthermore, the driving member 32 is restricted by the second anti-rotation mechanism and cannot perform rotational motion, but can only perform linear motion along the axial direction of the piston 22 .

[0054] When the operator turns the operating member 31, since the driving member 32 cannot rotate, the friction between the first thread and the second thread drives the rotating member to move axially along the piston 22, and then drives the piston 22 to move linearly along the driving rod 21, thereby changing the working state of the valve.

[0055] Based on the above structural design, it can be seen that the operation mode of the second driving assembly 3 is extremely convenient, the transmission efficiency is high, the structural stability is strong, and each component can still maintain a stable transmission relationship after long-term use.

[0056] It should be noted that the positions of the first thread and the second thread in the above embodiments are conventional choices in practical applications. For those skilled in the art, without departing from the technical principles of the present application, swapping the positions of the first thread and the second thread, that is, the first thread is set on the driving member 32 and the second thread is set on the operating member 31, should also be regarded as the scope of protection of the present application.

[0057] In one embodiment, referring to Figure 2 As shown, in order to simplify the transmission relationship between the driving member 32 and the piston 22 , the driving member 32 is abutted against the piston 22 along the axial direction of the piston 22 .

[0058] In one embodiment, referring to Figures 2 to 4 As shown, the cover body 5 is provided with a through hole 51 for the driving member 32 to pass through, and the second anti-rotation mechanism includes a second anti-rotation protrusion 322 and a second anti-rotation groove 52 that are plug-in compatible. The second anti-rotation protrusion 322 is arranged on the circumferential outer wall of the operating member 31, and the second anti-rotation groove 52 is arranged on the circumferential hole wall of the through hole 51. The second anti-rotation groove 52 extends roughly along a direction parallel to the axial direction of the through hole 51, providing a certain axial movement space for the second anti-rotation protrusion 322, and limiting the rotation of the second anti-rotation protrusion 322, thereby limiting the rotation of the driving member 32.

[0059] It should be noted that the positions of the second anti-rotation protrusion 322 and the second anti-rotation groove 52 in the above embodiments are conventional choices in practical applications. For those skilled in the art, without departing from the technical principles of the present application, the positions of the second anti-rotation protrusion 322 and the second anti-rotation groove 52 are swapped, that is, the second anti-rotation protrusion 322 is arranged on the circumferential hole wall of the through hole 51, and the second anti-rotation groove 52 is arranged on the driving member 32, which should also be regarded as the protection scope of the present application.

[0060] In one embodiment, referring to Figures 2 to 4 As shown, the valve driving device further includes a flange 6 facing the through hole 51 and mounted on the cover body 5. To facilitate the installation of the operating member 31, the operating member 31 is composed of a knob portion 311 and a shaft portion 312. The knob portion 311 is located outside the housing 4, and the shaft portion 312 is connected to the knob portion 311 and the driving member 32. The shaft portion 312 also penetrates the flange 6 and is penetrated in the through hole 51 of the cover body 5.

[0061] Specifically, torque is transmitted between the knob portion 311 and the shaft portion 312 via a torque transmission structure. The end of the shaft portion 312 away from the driving member 32 is roughly constructed as a cubic structure and inserted into the knob portion 311 to achieve torque transmission between the two.

[0062] Furthermore, in order to stably connect the knob portion 311 and the shaft portion 312 together and prevent relative movement between the two in the axial direction, a latch structure is inserted in the radial direction of the knob portion 311 and the shaft portion 312, and the latch structure is used to stably connect the knob portion 311 and the shaft portion 312 together.

[0063] In one embodiment, referring to Figures 2 to 4 As shown, the shaft portion 312 includes a first shaft segment 3121 and a second shaft segment 3122 . The first shaft segment 3121 is inserted into the through hole 51 of the cover body 5 and threadedly cooperates with the driving member 32 . The second shaft segment 3122 passes through the flange 6 and is connected to the knob portion 311 .

[0064] Since part of the second shaft section 3122 extends to the outside of the housing 4, it is easily corroded when used in an underwater environment for a long time. Based on the above reasons, the first shaft section 3121 and the second shaft section 3122 are made of different materials, wherein the second shaft section 3122 is made of a corrosion-resistant material, so as to ensure that the second shaft section 3122 has relatively better corrosion resistance and improve the overall service life of the operating member 31.

[0065] In one embodiment, referring to Figures 2 to 4As shown, in order to limit the axial movement of the operating member 31, a radially protruding second stop portion 3123 is provided on the shaft portion 312 of the operating member 31, and the second stop portion 3123 is constructed as an annular structure. A third stop portion 53 is formed in the through hole 51, and the second stop portion 3123 is supported between the third stop portion 53 and the flange 6, thereby limiting the axial movement of the operating member 31 and fixing the position of the operating member 31, so as to facilitate the operator to apply torque to the operating member 31.

[0066] Furthermore, the shaft portion 312 of the operating member 31 is axially abutted against the driving rod 21 , and the axial position of the operating member 31 is again restricted by the driving rod 21 .

[0067] In one embodiment, referring to Figures 2 to 4 As shown, in order to stably connect the first shaft segment 3121 and the second shaft segment 3122 together and prevent relative movement between the two in the axial direction, a pin structure is inserted in the radial direction of the first shaft segment 3121 and the second shaft segment 3122, and the first shaft segment 3121 and the second shaft segment 3122 are stably connected together by the pin structure.

[0068] In one embodiment, referring to Figure 1 and Figure 2 As shown, the valve driving device further includes a pressure balancer 7 , which is mounted on the housing 4 and communicated with the cavity inside the housing 4 for balancing the pressure inside the housing 4 .

[0069] When the external environmental pressure exceeds the pressure balance limit of the pressure balancer 7, the pressure balancer 7 allows a small amount of external medium to enter the interior of the housing 4 through the inlet safety valve to compensate for this part of the pressure. When the internal pressure of the housing 4 exceeds the pressure balance limit, the excess pressure medium in the housing 4 is also allowed to be discharged from the housing 4 through the outlet safety valve.

[0070] In one embodiment, referring to Figure 1 and Figure 2 As shown, the valve driving device further includes a pointer assembly 8, which is mounted on the cover body 5 and connected to the second seat body 24. The position of the pointer 81 of the pointer assembly 8 is changed by the linear motion of the second seat body 24, so that when the second seat body 24 is located at different positions (i.e., the valve stem 93 of the valve rotates to different angles), the pointer 81 of the pointer assembly 8 can point to different scale marks, so that the operator can judge the current working state of the valve by the direction of the pointer.

[0071] In one embodiment, referring to Figure 1 and Figure 2As shown, the present invention further provides a valve, which includes a valve body 9 and the valve driving device in the above embodiment, wherein the valve body 9 includes a valve seat 91, a valve plate 92 and a valve stem 93. The valve seat 91 is fixedly connected to the cylinder body 1 by bolts, the valve plate 92 is arranged inside the valve seat 91, one end of the valve stem 93 is connected to the valve plate 92, and the other end is connected to the driving rod 21. When the driving rod 21 rotates, the valve plate 92 can be driven to rotate by the valve stem 93 to change the working state of the valve.

[0072] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0073] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A valve driving device, characterized in that: The valve driving device comprises: A cylinder body (1) comprising a containing chamber (11) and a medium flow channel (12) communicating with the containing chamber (11); A first driving assembly (2), comprising a driving rod (21), a piston (22) and a first transmission mechanism, wherein the driving rod (21) is at least partially inserted into the accommodating chamber (11) and is used to be connected to the valve stem (93) of the valve, the piston (22) is at least partially sleeved on the driving rod (21), and the piston (22) and the driving rod (21) are connected via the first transmission mechanism; A second driving assembly (3), comprising an operating member (31), a driving member (32) and a second transmission mechanism, wherein the driving member (32) is connected to the piston (22), and the operating member (31) and the driving member (32) are connected via the second transmission mechanism; When a medium is input into or output from the accommodating chamber (11) through the medium flow channel (12), the piston (22) can be driven to move linearly along the driving rod (21); When the operating member (31) is screwed, the rotational motion of the operating member (31) can be converted into a linear motion of the piston (22) along the driving rod (21) through the second transmission mechanism; When the piston (22) moves linearly along the driving rod (21), the linear motion of the piston (22) can be converted into rotational motion of the driving rod (21) through the first transmission mechanism, thereby causing the driving rod (21) to drive the valve stem (93) of the valve to rotate.

2. The valve driving device according to claim 1, characterized in that: The driving member (32) is held against the piston (22) along the axial direction of the piston (22); the second transmission mechanism comprises a first thread and a second thread, the first thread and the second thread are threadably matched, one of the first thread and the second thread is provided on the driving member (32), and the other of the first thread and the second thread is provided on the operating member (31); The second driving assembly (3) also includes a second anti-rotation mechanism for limiting the rotation of the driving member (32).

3. The valve driving device according to claim 2, characterized in that: The driving member (32) is formed with a threaded hole (321) for the operating member (31) to pass through, the first thread is arranged on the circumferential outer wall of the driving member (32), and the second thread is arranged on the circumferential hole wall of the threaded hole (321).

4. The valve driving device according to claim 2, characterized in that: The valve driving device comprises a fixed cover body (5), and the cover body (5) is provided with a through hole (51) for the driving member (32) to pass through; The second anti-rotation mechanism includes a second anti-rotation protrusion (322) and a second anti-rotation groove (52) that are plug-fitted together, one of the second anti-rotation protrusion (322) and the second anti-rotation groove (52) is arranged on the circumferential outer wall of the driving member (32), and the other is arranged on the circumferential hole wall of the through hole (51), and the second anti-rotation groove (52) extends in a direction parallel to the axial direction of the through hole (51).

5. The valve driving device according to claim 4, characterized in that: The valve driving device further comprises a housing (4) which is covered on the cylinder body (1), the driving rod (21) and the piston (22) are at least partially accommodated in the housing (4), and the cover (5) is mounted on the housing (4); The valve driving device further comprises a flange (6) facing the through hole (51) and mounted on the cover body (5); The operating member (31) comprises a knob portion (311) located outside the housing (4) and a shaft portion (312) connected to the knob portion (311); the shaft portion (312) passes through the flange (6) and is disposed in a through hole (51) of the cover body (5).

6. The valve driving device according to claim 5, characterized in that: The shaft portion (312) comprises a first shaft segment (3121) penetrating the through hole (51) of the cover body (5) and a second shaft segment (3122) penetrating the flange (6) and connected to the knob portion (311), wherein the second shaft segment (3122) is made of corrosion-resistant material.

7. The valve driving device according to claim 5, characterized in that: The shaft portion (312) is provided with a radially protruding second stop portion (3123), and a third stop portion (53) is formed in the through hole (51). The third stop portion (53) and the flange (6) are respectively abutted against two sides of the second stop portion (3123) along the axial direction of the shaft portion (312).

8. The valve driving device according to claim 1, characterized in that: The first transmission mechanism comprises a plug-fitting spiral groove (221) and a transmission member (211), wherein the spiral groove (221) extends spirally in a direction parallel to the axial direction of the piston (22), and one of the spiral groove (221) and the transmission member (211) is arranged on the piston (22), and the other is arranged on the driving rod (21).

9. The valve driving device according to claim 1, characterized in that: The valve driving device also includes a first seat body (23) which is fixed in position and sleeved on the piston (22); The first drive assembly (2) further comprises a first anti-rotation mechanism for limiting the rotation of the piston (22); The first anti-rotation mechanism includes a first anti-rotation protrusion (222) and a first anti-rotation groove (231) that are plug-fitted together, one of the first anti-rotation protrusion (222) and the first anti-rotation groove (231) is arranged on the circumferential outer wall of the piston (22), and the other is arranged on the circumferential inner wall of the first seat body (23), and the first anti-rotation groove (231) extends in a direction parallel to the axial direction of the piston (22).

10. A valve, characterized in that: The valve comprises a valve driving device as claimed in any one of claims 1 to 9.

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