Valve device with stepless adjusting function and adjusting method
By designing a limit drive disc, limit assembly and drive assembly in the valve device, and using the drive handle to achieve limit and opening adjustment, the problem of small valve limit range in the prior art is solved, and the valve opening is achieved Accurate control and flexible adjustment.
Patent Information
- Application Number
- CN202411291643.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2024-12-10
AI Technical Summary
The limiting mechanism of existing valves mainly limits the switch position, which cannot meet the precise adjustment requirements for valve opening in specific occasions, and the adjustment range of the traditional limiting mechanism is small, which cannot meet the limiting requirements for specific applications in a timely manner.
A valve device with infinite adjustment function is designed. By setting a limit transmission disc, limit assembly and drive assembly on the valve stem, limit and opening adjustment is achieved using the drive handle, the limit adjustment range is expanded, and the switching stroke is allowed. simplify the operation steps in other locations.
It realizes precise control of valve opening, expands the limit adjustment range, meets the needs of specific occasions, simplifies operating steps, and improves the flexibility and accuracy of the valve device.
Smart Images
Figure CN119103399A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of valve technology, and in particular to a valve device with stepless regulation function and a regulation method. Background Art
[0002] Valves are control components in pipeline fluid delivery systems. They have the function of changing the cross-section of the passage and the flow direction of the medium. They have the functions of diversion, cutoff, regulation, throttling, non-return, diversion or overflow pressure relief. Most of the existing mechanical limit mechanisms are mostly limited to the switch position, and few limit the position other than the switch position. With the continuous advancement of science and technology, the application scope and functional requirements of valves are also increasing. In some specific occasions, it is necessary to limit the valve to a specific opening. The traditional limit mechanism has a small limit adjustment range and cannot be limited in time, which cannot meet the requirements. Summary of the invention
[0003] Technical problem to be solved: In view of the problems existing in the prior art, the present invention provides a valve device with stepless adjustment function and an adjustment method. The valve device can not only meet the common switch position limit, but also realize the limit function at other positions in the switch stroke, expand the range of limit adjustment, meet the needs of specific occasions, and make up for the shortcomings of existing manual valves; reasonable structural design enables the driving handle to realize the unlocking limit and limit opening adjustment functions, simplify the operating steps, and facilitate the limit operation.
[0004] Technical solution: The valve device with stepless adjustment function described in the present invention comprises a valve body, the valve body is equipped with a limit mechanism, the limit mechanism comprises a box body and a box cover arranged at the top of the box body, one end of the valve stem of the valve body extends into the box body and passes through the top of the box cover; A limit transmission disc is fixedly mounted on the valve stem, and a limit convex block is arranged on the outer periphery of the limit transmission disc; The valve stem is located at the upper and lower sides of the limit transmission disc, and the first limit assembly and the second limit assembly are respectively provided correspondingly, and the first drive assembly and the second drive assembly are respectively provided correspondingly to the first limit assembly and the second limit assembly; Wherein, the first limit assembly and the second limit assembly have a first working position away from the limit protrusion, and in the first working position state, the valve stem can drive the limit transmission disk to rotate freely to meet the opening adjustment of the valve body; The first limit assembly and the second limit assembly have a second working position close to the limit protrusion. In the second working position, the first limit assembly and the second limit assembly are respectively and correspondingly attached to both sides of the limit protrusion to limit the rotation of the valve stem.
[0005] Preferably, the first limiting assembly and the second limiting assembly each include a limiting body and a driving turntable; The two limit bodies are fixedly connected to the two ends of the valve stem away from the limit transmission disk, and the two driving rotary disks are correspondingly distributed on both sides of the limit transmission disk and rotatably connected to the valve stem, and the driving rotary disks are located inside the limit bodies; A first limiting block is arranged on one side of the outer circumference of the limiting body; The upper and lower disk surfaces of the outer circumference of the driving turntable are respectively provided with a second limit block corresponding to the first limit block and a third limit block corresponding to the limit convex block.
[0006] Preferably, the first driving assembly and the second driving assembly both include a power wheel corresponding to the driving rotary disk, and the driving rotary disk is arranged perpendicular to the axial direction of the power wheel; A driving shaft is connected to the axis of the power wheel, and the driving shaft is rotatably connected to the side wall of the box body through a shaft sleeve.
[0007] Preferably, a plurality of driving posts are arranged at equal intervals on the outer circumference of the driving turntable, a driving spiral is arranged on the power wheel disc surface along the axis, and the open end of the driving spiral is correspondingly clamped in the notch between the two driving posts.
[0008] Preferably, the outer circumference of the driving turntable is provided with a gear area, and the outer circumference of the power wheel is provided with a gear area meshing with the gear area of the driving turntable.
[0009] Preferably, a driving handle or a driving motor is provided at the outer end of the driving shaft.
[0010] Preferably, a locking screw is provided on the outer periphery of the sleeve, and tightening the locking screw can limit the rotation of the drive shaft in the sleeve.
[0011] Preferably, a pointer is provided at the top end of the valve stem, and a dial corresponding to the pointer is provided on the box cover around the valve stem.
[0012] Preferably, the valve body comprises a valve tube, and the valve tube is provided with connecting end tubes correspondingly along both ends of its diameter, and the two connecting end tubes are rotatably connected with valve stems, and the valve stem is located in the valve tube and fixedly connected with a valve plate; The valve stem is fixedly provided with reinforcing sleeves at both ends of the valve plate, and a reinforcing frame plate is provided between two reinforcing sleeves on one side of the valve plate, and a reinforcing rib plate is provided between the reinforcing frame plate and the valve plate.
[0013] The present invention also discloses a stepless adjustment method for a valve device, which comprises the following specific steps: Step 1: According to the pointer reading on the dial, adjust the opening of the valve stem and valve plate of the valve device to the required angle; Step 2: Rotate the driving handles of the first driving assembly and the second driving assembly clockwise in sequence to drive the corresponding driving turntable to rotate; under the action of the driving turntable, the driving turntable corresponding to the first limiting assembly rotates clockwise, driving the corresponding third limiting block to approach the limiting protrusion from one side; under the action of the driving turntable, the driving turntable corresponding to the second limiting assembly rotates counterclockwise, driving the corresponding third limiting block to approach the limiting protrusion from the other side, and after the two third limiting blocks corresponding to the first limiting assembly and the second limiting assembly clamp the limiting protrusion, stop rotating the driving handle, and the limiting transmission disk and the valve stem are locked in the desired position; Step 3: When the opening of the valve stem and the valve plate needs to be adjusted, the position limitation of the limit protrusion is ended, and the driving handles of the first driving assembly and the second driving assembly are rotated counterclockwise in turn to drive the corresponding driving turntables to rotate. After the driving turntable corresponding to the first limit assembly rotates in the opposite direction until the second limit block conflicts with the corresponding first limit block, the first limit assembly can be reset; after the driving turntable corresponding to the second limit assembly rotates in the opposite direction until the second limit block conflicts with the corresponding first limit block, the second limit assembly can be reset completely; the two third limit blocks corresponding to the first limit assembly and the second limit assembly in the reset state are located outside the stroke of the limit protrusion, and the opening of the valve stem and the valve plate can be freely adjusted in the non-limited state; Step 4: Repeat steps 1 to 3 to enable the valve device to freely control the valve opening and limit the valve stem position.
[0014] Compared with the prior art, the present invention has at least the following outstanding advantages: 1. The valve device of the present invention can not only meet the common switch position limit, but also realize the limit function at other positions in the switch stroke, expand the range of limit adjustment, meet the needs of specific occasions, and make up for the shortcomings of existing valves; 2. The first limit assembly and the second limit assembly of the valve device have a first working position away from the limit protrusion. In the first working position, the valve stem can drive the limit transmission disk to rotate freely to meet the valve body opening adjustment; the first working position is the first limit assembly and the second limit assembly are in a non-limiting state. The first limit assembly and the second limit assembly have a second working position close to the limit protrusion. In the second working position, the first limit assembly and the second limit assembly are respectively correspondingly attached to the two sides of the limit protrusion to limit the rotation of the valve stem. When the valve stem and the valve plate connected thereto are adjusted to the desired position, the first limit assembly and the second limit assembly are driven to limit the limit protrusion. When in the second working position, the first limit assembly and the second limit assembly limit the rotation of the valve stem by limiting the limit protrusion, so as to meet the valve opening limit in a specific state, prevent the valve opening from changing under the action of the fluid, and improve the precise control of the valve opening; 3. The limit assembly has a reasonable structural design, so that the driving handle can realize the functions of unlocking the limit and adjusting the limit opening, simplifying the operation steps and facilitating the limit operation; 4. Both ends of the valve pipe of the valve device are provided with connecting flanges, which are convenient for the fixed connection of the valve device; the valve plate has high structural strength and can be stably rotated and connected in the valve pipe to realize free adjustment of the valve opening; 5. A dial corresponding to the pointer is arranged on the box cover around the valve stem. The pointer is installed on the top of the valve stem by bolts. The current opening of the valve device can be judged by the cooperation of the pointer and the dial. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the valve device of the present invention; Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the middle limit mechanism; Figure 3 for Figure 2 A longitudinal structural cross-sectional view of the middle limit mechanism; Figure 4 for Figure 2 A cross-sectional view of the structure of the middle limit mechanism; Figure 5 for Figure 3 or a schematic diagram of the connection structure between the limit assembly and the drive assembly in 4; Figure 6 for Figure 5 Schematic diagram of the connection structure of the upper limit assembly of the middle valve stem; Figure 7 for Figure 6 A schematic diagram of the structure of the first limiting component / the second limiting component from the first viewing angle; Figure 8 for Figure 7 A schematic diagram of the structure of the first limiting component / the second limiting component from a second viewing angle; Fig. 9 for Figure 5 Schematic diagram of the three-dimensional structure of the first drive component / second drive component.
[0016] 1. Valve assembly; 2. Valve body; 3. Valve pipe; 4. Connecting end pipe; 5. Valve seat; 6. Reinforced bushing; 7. Strengthened frame plate; 8. Reinforced rib plate; 9. Valve plate; 10. Limiting mechanism; 11. Box body; 12. Box cover; 13. Dial; 14. Pointer; 15. First drive assembly; 16. Second drive assembly; 17. Valve stem; 18. First limiting assembly; 19. Second limiting assembly; 20. Limiting transmission disk; 210. Limiting protrusion; 211. Limiting body; 211. First limiting block; 212. Driving turntable; 2121. Disk body; 2122. Driving column; 2123. Second limiting block; 2124. Third limiting block; 213. Driving shaft; 214. Driving handle; 215. Power wheel; 216. Driving spiral; 217. Bushing. DETAILED DESCRIPTION
[0017] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figures 1 to 9 The technical solutions of the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.
[0018] Example 1: Figure 1 As shown, the present invention discloses a valve device with stepless adjustment function, including a valve body 1, the valve body 1 includes a valve tube 11, and the valve tube 11 is provided with connecting end tubes 12 along the two ends of the diameter thereof, and the two connecting end tubes 12 are rotatably connected with valve stems 27, and the valve stem 27 is located in the valve tube 11 and fixedly connected with a valve plate 17; the valve stem 27 is located at both ends of the valve plate 17 and fixedly provided with reinforcing sleeves 14, and a reinforcing frame plate 15 is provided between the two reinforcing sleeves 14 on one side of the valve plate 17, and a reinforcing rib plate 16 is provided between the reinforcing frame plate 15 and the valve plate 17. The two ends of the valve tube 11 are respectively provided with connecting flanges to facilitate the fixed connection of the valve device 100; the valve plate 17 has high structural strength and can be stably rotatably connected in the valve tube 11 to realize the free adjustment of the valve opening. The two sides of the connecting end tube 12 corresponding to the connecting shaft are provided with valve seats 13, and the connecting shaft is correspondingly provided with a driving motor, and the driving motor can drive the valve plate 17 to rotate in the valve tube 11 along its connecting shaft, thereby realizing the free adjustment of the valve device opening. The connecting end pipe 12 corresponding to the other connecting shaft is correspondingly connected to the limiting mechanism 2, and the limiting mechanism 2 is used to limit the free rotation of the connecting shaft and the valve plate 17 after the opening of the valve plate 17 of the valve device is adjusted to a certain position.
[0019] like Figure 2As shown, the limit mechanism 2 includes a box body 21 and a box cover 22 arranged at the top of the box body 21. One end of the valve stem 27 of the valve body 1 extends into the box body 21 and passes through the top of the box cover 22. A pointer 24 is arranged on the top of the valve stem 27. A dial 23 corresponding to the pointer 24 is arranged on the box cover 22 in the circumferential direction of the valve stem 27. The pointer 24 is installed on the top of the valve stem by bolts, and the current opening of the valve device can be judged by the cooperation of the pointer 24 and the dial 23.
[0020] like Figures 3 to 6 As shown, a limited transmission disc 210 is fixedly mounted on the valve stem 27, and the limited transmission disc 210 is correspondingly arranged in the middle of the valve stem 27, and a limited projection 2101 is arranged on the periphery of the limited transmission disc 210. The valve stem 27 is located on the upper and lower sides of the limited transmission disc 210 and is respectively provided with a first limited component 28 and a second limited component 29, and the first driving component 25 and the second driving component 26 are respectively provided with the first limited component 28 and the second limited component 29, the first driving component 25 drives the first limited component 28 to move, and the second driving component 26 drives the second limited component 29 to move. Among them, the first limited component 28 and the second limited component 29 have a first working position away from the limited projection 2101, and in the first working position state, the valve stem 27 can drive the limited transmission disc 210 to rotate freely to meet the opening adjustment of the valve body 1; the first working position is that the first limited component 28 and the second limited component 29 are in a non-limiting state. The first limit assembly 28 and the second limit assembly 29 have a second working position close to the limit protrusion 2101. In the second working position, the first limit assembly 28 and the second limit assembly 29 are respectively fitted on both sides of the limit protrusion 2101 to limit the rotation of the valve stem 27. When the opening of the valve stem 27 and the valve plate 17 connected thereto are adjusted to the required position, the first limit assembly 28 and the second limit assembly 29 are driven to limit the limit protrusion 2101. When in the second working position, the first limit assembly 28 and the second limit assembly 29 limit the rotation of the valve stem 27 by limiting the limit protrusion 2101, thereby meeting the limitation of the valve opening under a specific state, preventing the valve opening from changing under the action of the fluid, and improving the precise control of the opening of the valve device.
[0021] In a preferred embodiment, if Figure 7-8As shown, the first limiting assembly 28 and the second limiting assembly 29 both include a limiting body 211 and a driving rotary disk 212. The two limiting bodies 211 are fixedly connected to the two ends of the valve stem 27 away from the limiting transmission disk 210. The two driving rotary disks 212 are correspondingly distributed on both sides of the limiting transmission disk 210 and are rotatably connected to the valve stem 27. The driving rotary disks 212 are correspondingly arranged on the inner side of the limiting bodies 211. The limiting bodies 211 corresponding to the first limiting assembly 28 and the second limiting assembly 29 are respectively arranged on both ends of the valve stem 27, and the corresponding driving rotary disks 212 are correspondingly arranged on the inner side of the limiting body 211. The two driving rotary disks 212 are respectively arranged on both sides of the limiting transmission disk 210, and the driving rotary disks 212 are freely rotatably sleeved on the valve stem 27. A first limit block 2111 is provided on one side of the outer circumference of the limit body 211; a second limit block 2123 corresponding to the first limit block 2111 and a third limit block 2124 corresponding to the limit protrusion 2101 are respectively provided on the upper and lower disk surfaces of the outer circumference of the driving rotary disk 212. The first limit block 2111 corresponding to the limit body 211 is used to determine the working position of the driving rotary disk 212, and the third limit blocks 2124 of the two driving rotary disks 212 are used to limit the rotation of the limit protrusion 2101 of the limit transmission disk 210, thereby realizing the limit of the position of the valve stem 27. The second limit block 2123 and the third limit block 2124 provided on the upper and lower sides of the driving rotary disk are used for reset and limit, respectively. The angle between the second limit block 2123 and the third limit block 2124 of each driving rotary disk is 90°, so that the reset stroke of the driving rotary disk is greater than the limit stroke, avoiding affecting the rotation of the valve stem.
[0022] like Figure 5 and 9 As shown, the first driving assembly 25 and the second driving assembly 26 both include a power wheel 215 corresponding to the driving turntable 212, and the driving turntable 212 is arranged perpendicular to the axial direction of the power wheel 215. A driving shaft 213 is connected to the axis of the power wheel 215, and the driving shaft 213 is rotatably connected to the side wall of the box body 21 through a shaft sleeve 217. The driving shaft 213 rotates along the shaft sleeve 217 to drive the power wheel 215 to rotate forward or reversely. The rotation of the driving turntable 212 can be driven by the power wheel 215.
[0023] In a preferred embodiment, if Figures 5 to 9As shown, the driving turntable 212 includes a disk body 2121 and a plurality of driving columns 2122 arranged at equal intervals on the outer circumference of the disk body 2121. A driving spiral 216 is arranged on the disk surface of the power wheel 215 along the axis, and the open end of the driving spiral 216 is correspondingly clamped in the groove between the two driving columns 2122. The power wheel and the driving turntable 212 can form a one-way locking structure. The power wheel 215 is driven to rotate by rotating the driving handle 214, and the driving turntable 212 also rotates slowly. The driving turntable can rotate one grid for every rotation of the power wheel 215, thereby improving the control accuracy of the first limit assembly and the second limit assembly; since the driving turntable and the valve stem are smoothly connected, power will not be transmitted to the driving turntable during the rotation of the valve stem, and the power wheel will not be driven to rotate.
[0024] In a preferred embodiment, the outer circumference of the driving turntable 212 is provided with a gear area, and the outer circumference of the power wheel 215 is provided with a gear area meshing with the gear area of the driving turntable 212. The gear area can adopt a conical tooth area or a helical tooth area (not shown in the figure) to meet the power transmission requirements of the power wheel and the driving turntable. It should be noted that the driving method of the power wheel and the driving turntable is not limited to the technical solution described in the present invention.
[0025] The outer end of the driving shaft 213 is provided with a driving handle 214 or a driving motor. Fig. 9 As shown, the outer end of the drive shaft 213 is connected with a drive handle 214, which can conveniently drive the rotation of the power wheel 215. In addition, the outer end of the drive shaft 213 is provided with a drive motor with a transmission connection, which can also realize the driving function of the power wheel 215.
[0026] In a preferred embodiment, a locking screw (not shown in the figure) is arranged on the outer periphery of the shaft sleeve 217. Tightening the locking screw can limit the rotation of the drive shaft 213 in the shaft sleeve 217. Loosening the locking screw can release the restriction of the drive shaft 213, and the drive shaft 213 can rotate freely along the shaft sleeve 217. It should be noted that the locking screw can be designed as a conveniently adjustable knob structure, which can meet the needs of manual convenient rotation locking.
[0027] Embodiment 2: The present invention also discloses a stepless adjustment method for a valve device, which comprises the following specific steps: Step 1: According to the reading of the pointer 24 on the dial 23, adjust the opening of the valve stem 27 and the valve plate 17 of the valve device 100 to a desired angle.
[0028] Step 2: Rotate the driving handles 214 of the first driving assembly 25 and the second driving assembly 26 clockwise in sequence to drive the corresponding driving turntable 212 to rotate; under the action of the driving turntable 212, the driving turntable 212 corresponding to the first limiting assembly 28 rotates clockwise, driving the corresponding third limiting block 2124 to approach the limiting protrusion 2101 from one side; under the action of the driving turntable 212, the driving turntable 212 corresponding to the second limiting assembly 29 rotates counterclockwise, driving the corresponding third limiting block 2124 to approach the limiting protrusion 2101 from the other side, and after the two third limiting blocks 2124 corresponding to the first limiting assembly 28 and the second limiting assembly 29 clamp the limiting protrusion 2101, stop rotating the driving handle 214, and the limiting transmission disk 210 and the valve stem 27 are locked in the desired position.
[0029] Step 3: When the opening of the valve stem 27 and the valve plate 17 needs to be adjusted, the position limitation of the limit protrusion 2101 is ended, and the driving handles 214 of the first driving assembly 25 and the second driving assembly 26 are rotated counterclockwise in turn to drive the corresponding driving turntable 212 to rotate, and the driving turntable 212 corresponding to the first limiting assembly 28 is reversely rotated until the second limiting block 2123 conflicts with the corresponding first limiting block 2111, and the first limiting assembly 28 can be reset; the driving turntable 212 corresponding to the second limiting assembly 29 is reversely rotated until the second limiting block 2123 conflicts with the corresponding first limiting block 2111, and the second limiting assembly 29 can be completely reset; the two third limiting blocks 2124 corresponding to the first limiting assembly 28 and the second limiting assembly 29 in the reset state are located outside the stroke of the limiting protrusion 2101, and the opening of the valve stem 27 and the valve plate 17 can be freely adjusted in the non-limited state.
[0030] Step 4: Repeating steps 1 to 3 can enable the valve device 100 to freely control the valve opening and limit the position of the valve stem 27.
[0031] In the above embodiments, the first limit assembly, the second limit assembly, and the first drive assembly and the second limit assembly which are arranged in cooperation therewith are not limited in the function of realizing locking or releasing the restriction by clockwise rotation or counterclockwise rotation, and they only need to meet the purpose of the invention.
[0032] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A valve device with stepless adjustment function, comprising a valve body (1), characterized in that: The valve body (1) is provided with a limiting mechanism (2), the limiting mechanism (2) comprising a box body (21) and a box cover (22) provided at the top end of the box body (21), one end of a valve stem (27) of the valve body (1) extends into the box body (21) and passes through the top end of the box cover (22); A limit transmission disc (210) is fixedly mounted on the valve stem (27), and a limit protrusion (2101) is arranged on the outer periphery of the limit transmission disc (210); The valve stem (27) is located on the upper and lower sides of the limit transmission disk (210), and is provided with a first limit assembly (28) and a second limit assembly (29) respectively, and is provided with a first drive assembly (25) and a second drive assembly (26) respectively corresponding to the first limit assembly (28) and the second limit assembly (29); The first limit assembly (28) and the second limit assembly (29) have a first working position away from the limit protrusion (2101), and in the first working position, the valve stem (27) can drive the limit transmission disk (210) to rotate freely to meet the opening adjustment of the valve body (1); The first limit assembly (28) and the second limit assembly (29) have a second working position close to the limit protrusion (2101). In the second working position, the first limit assembly (28) and the second limit assembly (29) are respectively and correspondingly fitted on both sides of the limit protrusion (2101) to limit the rotation of the valve stem (27).
2. The valve device with stepless adjustment function according to claim 1, characterized in that: The first limiting assembly (28) and the second limiting assembly (29) both comprise a limiting body (211) and a driving rotating disk (212); The two limiting bodies (211) are fixedly connected to the two ends of the valve stem (27) away from the limiting transmission disk (210), and the two driving rotating disks (212) are correspondingly distributed on both sides of the limiting transmission disk (210) and are rotatably connected to the valve stem (27), and the driving rotating disks (212) are located on the inner side of the limiting bodies (211); A first limiting block (2111) is provided on one side of the outer circumference of the limiting body (211); A second limit block (2123) corresponding to the first limit block (2111) and a third limit block (2124) corresponding to the limit protrusion (2101) are respectively arranged on the upper and lower disk surfaces on the outer periphery of the driving rotary disk (212).
3. The valve device with stepless adjustment function according to claim 2, characterized in that: The first driving assembly (25) and the second driving assembly (26) both comprise a power wheel (215) arranged corresponding to the driving rotating disk (212), and the driving rotating disk (212) and the power wheel (215) are arranged perpendicularly to each other in an axial direction; A drive shaft (213) is connected to the axis of the power wheel (215), and the drive shaft (213) is rotatably connected to the side wall of the box body (21) via a shaft sleeve (217).
4. The valve device with stepless adjustment function according to claim 3, characterized in that: A plurality of driving posts (2122) are arranged at equal intervals on the outer circumference of the driving rotating disk (212), a driving spiral (216) is arranged on the disk surface of the power wheel (215) along the axis, and an open end of the driving spiral (216) is correspondingly engaged with a notch between two driving posts (2122).
5. The valve device with stepless adjustment function according to claim 3, characterized in that: The outer circumference of the driving rotating disk (212) is provided with a gear area, and the outer circumference of the power wheel (215) is provided with a gear area meshing with the gear area of the driving rotating disk (212).
6. The valve device with stepless adjustment function according to claim 3, characterized in that: The outer end of the driving shaft (213) is provided with a driving handle (214) or a driving motor.
7. The valve device with stepless adjustment function according to claim 3, characterized in that: A locking screw is provided on the outer periphery of the shaft sleeve (217), and tightening the locking screw can limit the rotation of the drive shaft (213) on the shaft sleeve (217).
8. The valve device with stepless adjustment function according to claim 1, characterized in that: A pointer (24) is provided at the top end of the valve stem (27), and a dial (23) corresponding to the pointer (24) is provided on the box cover (22) in the circumferential direction of the valve stem (27).
9. The valve device with stepless adjustment function according to any one of claims 1 to 8, characterized in that: The valve body (1) comprises a valve tube (11), the valve tube (11) being provided with connecting end tubes (12) along the two ends of the diameter thereof, the two connecting end tubes (12) being rotatably connected with valve stems (27), and the valve stem (27) being located in the valve tube (11) and fixedly connected with a valve plate (17); The valve stem (27) is fixedly provided with reinforcing sleeves (14) at both ends of the valve plate (17), and a reinforcing frame plate (15) is provided between two reinforcing sleeves (14) on one side of the valve plate (17), and a reinforcing rib plate (16) is provided between the reinforcing frame plate (15) and the valve plate (17).
10. A stepless adjustment method for a valve device as claimed in claim 9, characterized in that: The method comprises the following specific steps: Step 1: According to the reading of the pointer (24) on the dial (23), the opening of the valve stem (27) and the valve plate (17) of the valve device (100) is adjusted to a desired angle; Step 2: The driving handles (214) of the first driving assembly (25) and the second driving assembly (26) are rotated clockwise in sequence to drive the corresponding driving turntable (212) to rotate; under the action of the driving turntable (212), the driving turntable (212) corresponding to the first limiting assembly (28) rotates clockwise, driving the corresponding third limiting block (2124) to approach the limiting protrusion (2101) from one side; under the action of the driving turntable (212), the driving turntable (212) corresponding to the second limiting assembly (29) rotates counterclockwise, driving the corresponding third limiting block (2124) to approach the limiting protrusion (2101) from the other side. After the two third limiting blocks (2124) corresponding to the first limiting assembly (28) and the second limiting assembly (29) clamp the limiting protrusion (2101), the driving handle (214) is stopped from rotating, and the limiting transmission disk (210) and the valve stem (27) are locked at the desired position; Step 3: When the opening of the valve stem (27) and the valve plate (17) needs to be adjusted, the position of the limit block (2101) is limited, and the driving handles (214) of the first driving assembly (25) and the second driving assembly (26) are rotated counterclockwise in sequence to drive the corresponding driving turntable (212) to rotate. The driving turntable (212) corresponding to the first limit assembly (28) is rotated in the opposite direction until the second limit block (2123) contacts the corresponding first limit block (2111), and the first limit assembly (28) is completed. ); after the driving turntable (212) corresponding to the second limit assembly (29) rotates in the opposite direction until the second limit block (2123) contacts the corresponding first limit block (2111), the second limit assembly (29) can be completely reset; the first limit assembly (28) and the two third limit blocks (2124) corresponding to the second limit assembly (29) in the reset state are located outside the stroke of the limit protrusion (2101), and the opening of the valve stem (27) and the valve plate (17) can be freely adjusted in the non-limiting state; Step 4: Repeating steps 1 to 3 can realize the valve device (100) freely controlling the valve opening and limiting the position of the valve stem (27).