Anti-offset self-locking executing mechanism and stop valve applying same

Abstract

The invention provides an anti-deviation self-locking executing mechanism and a stop valve applying the anti-deviation self-locking executing mechanism, and relates to the technical field of valves.The anti-deviation self-locking executing mechanism comprises a mounting plate, a valve rod is arranged on the mounting plate in a penetrating mode, a movable plate is coaxially arranged on the peripheral side of the valve rod, limiting holes are symmetrically formed in the valve rod, stop rods are symmetrically arranged on the movable plate, and springback mechanisms are symmetrically arranged on the mounting plate; positioning plates are arranged on the springback mechanism, limiting rods are arranged on the sides, close to each other, of the positioning plates, the stop rods are used for stopping the limiting rods from moving, and the limiting rods are matched with the limiting holes. The limiting holes are symmetrically formed in the peripheral side of the valve rod, the springback mechanisms, the positioning plates and the limiting rods are symmetrically arranged on the mounting plate, a double-side symmetrical locking structure is formed, compared with an existing single-side locking design, the valve rod can be stressed evenly, interference caused by external factors such as fluid pressure and vibration is effectively resisted, and the service life of the valve rod is prolonged. And the problems of dislocation of the limiting rod and the limiting hole and separation from locking constraint are avoided.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to an anti-offset self-locking actuator and a shut-off valve using the same. Background Technology

[0002] A gate valve is a type of valve that relies on the rising and falling of the valve stem to control the contact or separation of the valve core (valve disc) with the valve seat sealing surface, thereby realizing the opening and closing of pipelines or the regulation of flow. It has the characteristics of good sealing tightness, simple structure, convenient operation and precise flow regulation, but the flow resistance is relatively large. The medium usually needs to flow in the manner of "low in, high out". It is suitable for a variety of media such as water, steam, oil, and gas, and is widely used in pipeline systems in industries such as chemical, petroleum, power, and construction.

[0003] Existing patent CN223399270U discloses a self-locking shut-off valve, including a valve body, a valve cover at the upper end of the valve body, etc. The self-locking actuator can be pushed into the self-locking receiving groove to lock the valve stem. The self-locking assembly also includes a control component for controlling the self-locking actuator to be hidden in the self-locking seat, and a locking component for locking the position of the self-locking actuator after it is hidden in the self-locking seat. After the position of the self-locking actuator is locked by the locking component, it can prevent the self-locking actuator from contacting the valve stem and generating frictional resistance.

[0004] However, the aforementioned patent only sets a locking structure on one side of the valve stem. During the operation of the valve stem, it is easily affected by external factors such as fluid pressure and vibration, resulting in uneven force. This can lead to misalignment between the self-locking actuator and the self-locking receiving groove, causing the valve to break free from the locking constraint of the locking element. This poses a risk of flow channel sealing failure and media leakage. Furthermore, the instability of one-sided locking may exacerbate the wear between the valve stem and the inner wall of the valve cavity, affecting the service life and operational reliability of the valve. Summary of the Invention

[0005] The present invention provides an anti-offset self-locking actuator and a shut-off valve using the same, to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention discloses an anti-offset self-locking actuator, including a mounting plate, a valve stem through which a valve stem is disposed, a movable plate coaxially disposed around the valve stem, limit holes symmetrically disposed on the valve stem, stop bars symmetrically disposed on the movable plate, a spring mechanism symmetrically disposed on the mounting plate, a positioning plate disposed on the spring mechanism, a limit bar disposed on the side of the positioning plates that are close to each other, the stop bars being used to block the movement of the limit bars, and the limit bars cooperating with the limit holes.

[0007] Preferably, a fixing ring is fixedly installed on the mounting plate, and guide rods are symmetrically arranged on the fixing ring. The guide rods pass through the moving plate, and a spring is fixedly installed at the lower end of the moving plate. The other end of the spring is fixed on the fixing ring, and the spring is fitted onto the valve stem. The limiting rod is provided with two through holes, and the stop rod is L-shaped, with the vertical section of the stop rod cooperating with the through holes.

[0008] Preferably, the retaining ring is coaxially arranged with the valve stem, and a plurality of abutment rods are fixedly arranged on the inner side of the retaining ring. Flexible rubber balls are fixedly arranged on the plurality of abutment rods, and the flexible rubber balls are in contact with the valve stem.

[0009] Preferably, the rebound mechanism includes a housing, which is fixedly mounted on a mounting plate. A sliding plate is slidably mounted inside the housing, and a sliding rod is fixedly mounted on the sliding plate. The sliding rod extends slidably out of the housing, and a reset member is sleeved on the sliding rod. One end of the reset member is fixedly connected to the sliding plate, and the other end of the reset member is fixedly connected to the housing. A positioning plate is fixedly mounted on the other end of the sliding rod, and the positioning plate is slidably mounted on the mounting plate.

[0010] Preferably, a sleeve is slidably provided on one side of the positioning plates that are close to each other. The sleeve is located above the limiting rod. A sliding plate is slidably provided inside the sleeve. A positioning rod is fixedly provided on the sliding plate. The positioning rod extends slidably out of the sleeve. A second spring is sleeved on the positioning rod. One end of the second spring is fixedly connected to the sleeve, and the other end of the second spring is fixedly connected to the sliding plate. Positioning holes are symmetrically provided on the valve stem. The positioning holes are located above the limiting holes and cooperate with the positioning rod.

[0011] Preferably, the positioning plate is provided with cavity one and cavity two, cavity two is located above cavity one, and a sliding groove is opened on the side wall of the two cavities one that are close to each other. The sleeve is slidably connected to the sliding groove, and an L-shaped drive rod is fixedly installed on the sleeve. The L-shaped drive rod slides upward and extends into cavity two. A push plate is fixedly installed at the upper end of the L-shaped drive rod. The push plate is slidably installed in cavity two. A snap-fit ​​plate is fixedly installed at the upper end of the push plate. The snap-fit ​​plate slides out of cavity two.

[0012] Preferably, a spring three is sleeved on the snap-fit ​​plate, one end of the spring three is fixedly connected to the cavity two, and the other end of the spring three is fixedly connected to the air push plate. An air outlet pipe is connected through the cavity two, and the other end of the air outlet pipe is connected through the hose. A through groove is provided on the positioning plate, and an installation block is slidably arranged on the through groove. An air bag is provided on the installation block, and a gas channel is provided inside the installation block. The gas channel is connected to the air bag, and the hose is connected to the gas channel.

[0013] Preferably, a connecting rod is fixedly installed on the mounting block, the connecting rod slides through the limiting rod, and the upper end of the connecting rod is fixedly connected to the sleeve.

[0014] Preferably, a shut-off valve includes the anti-offset self-locking actuator as described above, comprising a valve body, a cavity provided inside the valve body, a valve cover installed on the valve body, a valve stem slidingly extending through the valve cover into the cavity, a valve disc fixedly provided at the lower end of the valve stem, a fluid passage provided inside the valve body, and the valve disc used to control the opening and closing of the fluid passage.

[0015] Preferably, the valve cover is provided with a mounting plate, the valve stem is rotatably connected with a threaded rod, the threaded rod is threadedly connected with a valve stem nut, the valve stem nut is fixedly connected to the valve cover, and a handwheel is fixedly installed on the threaded rod. The handwheel includes an outer rotating ring, and several connecting rods are fixedly provided on the inner side of the outer rotating ring. The other end of the several connecting rods is fixedly connected to the same inner rotating ring, and the inner rotating ring is fixedly connected to the threaded rod.

[0016] Compared with the prior art, the present invention provides an anti-offset self-locking actuator and a shut-off valve using the same, which has the following advantages: by symmetrically setting limiting holes on the circumference of the valve stem, and combining them with a spring mechanism, a positioning plate and a limiting rod symmetrically arranged on the mounting plate, a double-sided symmetrical locking structure is formed. Compared with the single-sided locking design of the existing patent, the valve stem can be subjected to balanced force, effectively resisting interference from external factors such as fluid pressure and vibration, and avoiding the problem of misalignment between the limiting rod and the limiting hole and loss of locking constraint. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the actuator of the present invention; Figure 3 This is a top view of the fixing ring of the present invention; Figure 4 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 5 This is a schematic diagram of the internal structure of the sleeve of the present invention; Figure 6 This is a side view of the positioning plate of the present invention; Figure 7 This is a schematic diagram of the internal structure of cavity two of the present invention; Figure 8 This is a schematic diagram of the installation of cavity two and cavity one according to the present invention; Figure 9 For the present invention Figure 6 Rear view; Figure 10 This is a schematic diagram of the handwheel structure of the present invention.

[0018] In the diagram: 1. Valve body; 2. Valve disc; 3. Handwheel; 4. Fluid passage; 5. Cavity; 6. Mounting plate; 7. Threaded rod; 8. Valve stem nut; 9. Valve stem; 10. Valve cover; 11. L-shaped drive rod; 12. Retaining ring; 13. Housing; 14. Sliding rod; 15. Airbag; 16. Stop rod; 17. Limiting rod; 18. Sleeve; 19. Moving plate; 20. Snap-fit ​​plate; 21. Positioning plate; 22. Through hole; 23. Hose; 24. Limiting hole; 25. Spring 1; 26. Guide rod; 27. Abutment rod; 28. Flexible rubber ball; 29. ​​Sliding plate; 30. Spring 2; 31. Positioning rod; 32. Sliding plate; 33. Reset component; 34. Mounting block; 35. Slide groove; 36. Cavity 2; 37. Air push plate; 38. Spring 3; 39. Air outlet pipe; 40. Cavity 1; 41. Through groove; 42. Connecting rod; 43. Inner rotating ring; 44. Outer rotating ring; 45. Connecting rod; 46. Positioning hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example 1: An embodiment of the present invention provides an anti-offset self-locking actuator, such as... Figures 1-10As shown, the device includes a mounting plate 6, a valve stem 9 is provided through the mounting plate 6, a movable plate 19 is coaxially arranged around the valve stem 9, limit holes 24 are symmetrically arranged on the valve stem 9, stop bars 16 are symmetrically arranged on the movable plate 19, a spring mechanism is symmetrically arranged on the mounting plate 6, a positioning plate 21 is arranged on the spring mechanism, and a limit bar 17 is arranged on the side of the positioning plates 21 that are close to each other. The stop bar 16 is used to block the movement of the limit bar 17, and the limit bar 17 cooperates with the limit hole 24.

[0023] The working principle and beneficial effects of the above technical solution are as follows: In the initial position, the rebound mechanism causes the positioning plates 21 to tend to move closer to each other, the stop rod 16 contacts the limit rod 17, the stop rod 16 blocks the movement of the limit rod 17, when the valve rod 9 rises to the designated position, it pushes the moving plate 19 downward, the moving plate 19 drives the stop rod 16 to move synchronously, the stop rod 16 gradually releases the block on the limit rod 17, and the rebound mechanism drives the positioning plate 21 to move closer to the valve rod 9, the limit rod 17 will be inserted into the symmetrically arranged limit holes 24 on the valve rod 9, and the valve rod 9 will be locked on both sides. By symmetrically setting limiting holes 24 around the valve stem 9, and combining them with the spring mechanism, positioning plate 21 and limiting rod 17 symmetrically arranged on the mounting plate 6, a double-sided symmetrical locking structure is formed. Compared with the existing patented single-sided locking design, the valve stem can be subjected to balanced force, effectively resisting interference from external factors such as fluid pressure and vibration, and avoiding the problem of misalignment between the limiting rod 17 and the limiting hole 24 and loss of locking constraint.

[0024] Example 2: Based on Example 1 above, as follows Figures 1-4 As shown, a fixing ring 12 is fixedly installed on the mounting plate 6, and guide rods 26 are symmetrically arranged on the fixing ring 12. The guide rods 26 pass through the moving plate 19. A spring 25 is fixedly installed at the lower end of the moving plate 19. The other end of the spring 25 is fixed on the fixing ring 12 and the spring 25 is sleeved on the valve stem 9. The limiting rod 17 is provided with two through holes 22. The stop rod 16 is L-shaped, and the vertical section of the stop rod 16 cooperates with the through holes 22.

[0025] Preferably, the fixing ring 12 is coaxially arranged with the valve stem 9, and a plurality of abutment rods 27 are fixedly arranged on the inner side of the fixing ring 12. Flexible rubber balls 28 are fixedly arranged on the plurality of abutment rods 27, and the flexible rubber balls 28 are in contact with the valve stem 9.

[0026] Preferably, the rebound mechanism includes a housing 13, which is fixedly mounted on the mounting plate 6. A sliding plate 32 is slidably mounted inside the housing 13. A sliding rod 14 is fixedly mounted on the sliding plate 32 and extends slidably out of the housing 13. A reset member 33 is sleeved on the sliding rod 14. One end of the reset member 33 is fixedly connected to the sliding plate 32, and the other end of the reset member 33 is fixedly connected to the housing 13. A positioning plate 21 is fixedly mounted on the other end of the sliding rod 14 and slidably mounted on the mounting plate 6.

[0027] The working principle and beneficial effects of the above technical solution are as follows: When the moving plate 19 is pushed down, it moves smoothly and synchronously downward under the limiting action of the guide rod 26. The spring 25 at the lower end of the moving plate 19 is compressed and stores energy. The L-shaped stop bar 16 on the moving plate 19 moves with it, and the vertical section gradually disengages from the first through hole 22 of the limiting rod 17. At this time, the reset member 33 in the box 13 of the rebound mechanism releases elastic potential energy to push the sliding plate 32 to move, which drives the sliding rod 14 to extend towards the valve stem 9, thereby driving the positioning plate 21 to approach the valve stem 9, so that the limiting rod 17 is accurately embedded in the symmetrical limiting hole 24 of the valve stem 9, completing the double-sided locking. When unlocking, first press the moving plate 19 down, and then push the two positioning plates 21 to move in opposite directions. After the limiting is completed, the moving plate 19 is released, and the moving plate 19 is reset under the action of the spring 25. The L-shaped stop bar 16 on the moving plate 19 will be inserted into the second through hole 22, thereby completing the limiting bar 17 again and preventing the limiting bar 17 from disengaging. At the same time, the flexible rubber ball 28 on the inner side of the fixing ring 12 makes elastic contact with the valve stem 9 through the abutment bar 27, which not only helps the valve stem 9 to maintain coaxial and stable up and down movement, but also makes the valve stem 9, moving plate 19, positioning plate 21 and other parts evenly distributed with force, effectively resisting external interference such as fluid pressure and vibration, and improving the overall structural stability.

[0028] Example 3: Based on Example 2 above, as follows Figures 1-2 , Figure 5 As shown, a sleeve 18 is slidably disposed on one side of the positioning plates 21 that are close to each other. The sleeve 18 is located above the limiting rod 17. A sliding plate 29 is slidably disposed inside the sleeve 18. A positioning rod 31 is fixedly disposed on the sliding plate 29. The positioning rod 31 extends slidably out of the sleeve 18. A second spring 30 is sleeved on the positioning rod 31. One end of the second spring 30 is fixedly connected to the sleeve 18, and the other end of the second spring 30 is fixedly connected to the sliding plate 29. Positioning holes 46 are symmetrically disposed on the valve stem 9. The positioning holes 46 are located above the limiting hole 24 and cooperate with the positioning rod 31.

[0029] The working principle and beneficial effects of the above technical solution are as follows: In the initial position, the L-shaped stop bar 16 will block the movement of the positioning rod 31. When the moving plate 19 drives the L-shaped stop bar 16 to move downward, the L-shaped stop bar 16 will no longer block the positioning rod 31. The two positioning rods 31 will move towards each other under the action of the spring 20 (at the same time, the two positioning plates 21 will approach the valve stem 9, driving the sleeve 18 to move towards the valve stem 9 as well). The positioning rod 31 will stick to the valve stem 9. After that, as the L-shaped stop bar 16 is inserted into the second through hole 22, the L-shaped stop bar 16 will push the two sleeves 18 to rise. The sleeves 18 will drive the positioning rod 31 to rise. The positioning rod 31 will be inserted into the positioning hole 46, forming a secondary locking. Based on the dual-side locking of the above embodiments 1-2, a secondary locking structure consisting of a positioning rod 31 and a positioning hole 46 is added. Both locking levels adopt a symmetrical design. The dual constraint further improves the locking stability of the valve stem 9 and can more effectively resist external interference such as fluid pressure and vibration. The secondary locking structure works in conjunction with the basic locking structure to form a "dual guarantee" to avoid the risk of failure of a single locking structure, while not affecting the overall smooth operation of the valve stem 9.

[0030] Example 4: Based on Examples 1-3, such as Figures 1-2 , Figures 6-9 As shown, the positioning plate 21 is provided with cavity 40 and cavity 36. Cavity 36 is located above cavity 40. A sliding groove 35 is provided on the side wall of the two cavities 40 that are close to each other. The sleeve 18 is slidably connected to the sliding groove 35. An L-shaped drive rod 11 is fixedly provided on the sleeve 18. The L-shaped drive rod 11 slides upward and extends into cavity 36. A push plate 37 is fixedly provided at the upper end of the L-shaped drive rod 11. The push plate 37 is slidably provided in cavity 36. A snap-fit ​​plate 20 is fixedly provided at the upper end of the push plate 37. The snap-fit ​​plate 20 slides out of cavity 36.

[0031] Preferably, a spring 38 is fitted on the snap-fit ​​plate 20. One end of the spring 38 is fixedly connected to the cavity 2 36, and the other end of the spring 38 is fixedly connected to the air push plate 37. An air outlet pipe 39 is connected through the cavity 2 36, and the other end of the air outlet pipe 39 is connected through the hose 23. A through groove 41 is provided on the positioning plate 21, and an installation block 34 is slidably provided on the through groove 41. An air bag 15 is provided on the installation block 34, and a gas channel is provided inside the installation block 34. The gas channel is connected to the air bag 15, and the hose 23 is connected to the gas channel.

[0032] Preferably, a connecting rod 42 is fixedly provided on the mounting block 34, the connecting rod 42 slides through the limiting rod 17, and the upper end of the connecting rod 42 is fixedly connected to the sleeve 18.

[0033] The L-shaped drive rod 11 is equipped with a counterweight, which is used to reset the L-shaped drive rod 11.

[0034] The working principle and beneficial effects of the above technical solution are as follows: When the secondary locking is triggered, that is, when the L-shaped stop bar 16 is inserted into the second through hole 22, the L-shaped stop bar 16 drives the sleeve 18 to move upward synchronously along the slide groove 35. The sleeve 18 pushes the air pusher plate 37 to move upward in the cavity 36 through the L-shaped drive rod 11. The upward movement of the air pusher plate 37 drives the locking plate 20 to move upward. The locking plate 20 will limit the connecting rod 45. At the same time, when the sleeve 18 rises, the sleeve 18 drives the connecting rod 42 to move. The connecting rod 42 drives the mounting block 34. When the push plate 37 moves upward, it compresses the air in the cavity 36. The gas is injected into the airbag 15 through the gas passage of the outlet pipe 39, the hose 23 and the mounting block 34. After the airbag 15 expands, it fits tightly with the L-shaped stop bar 16, thus preventing the L-shaped stop bar 16 from coming out of the second through hole 22. The flexible fitting design of the airbag 15 effectively enhances the locking stability. The overall structure has a high degree of fit and can resist the interference of harsh working conditions such as high pressure and strong vibration to the greatest extent, making it more practical.

[0035] Example 5: A shut-off valve, including the anti-offset self-locking actuator as described above, such as... Figure 1 , Figure 10 As shown, the valve includes a valve body 1, a cavity 5 inside the valve body 1, a valve cover 10 installed on the valve body 1, a valve stem 9 slidingly passing through the valve cover 10 and extending into the cavity 5, a valve disc 2 fixedly installed at the lower end of the valve stem 9, a fluid channel 4 inside the valve body 1, and the valve disc 2 used to control the opening and closing of the fluid channel 4.

[0036] Preferably, the valve cover 10 is provided with a mounting plate 6, the valve stem 9 is rotatably connected with a threaded rod 7, the threaded rod 7 is threadedly connected with a valve stem nut 8, the valve stem nut 8 is fixedly connected to the valve cover 10 (not shown in the figure), the threaded rod 7 is fixedly installed with a handwheel 3, the handwheel 3 includes an outer rotating ring 44, a plurality of connecting rods 45 are fixedly provided on the inner side of the outer rotating ring 44, the other end of the plurality of connecting rods 45 is fixedly connected to the same inner rotating ring 43, and the inner rotating ring 43 is fixedly connected to the threaded rod 7.

[0037] The working principle and beneficial effects of the above technical solution are as follows: When the operator rotates the outer rotating ring 44 of the handwheel 3, the inner rotating ring 43 and the coaxially fixed threaded rod 7 are driven to rotate synchronously through the inner connecting rod 45; the threaded rod 7 and the valve stem nut 8 fixed on the valve cover 10 form a threaded engagement, converting the rotational motion into the axial linear motion of the valve stem 9; the valve stem 9 drives the valve disc 2 fixed at its end to move synchronously axially: when the valve disc 2 moves downward to the sealing surface that fits the fluid channel 4, the flow channel is cut off; when the handwheel 3 is rotated in the opposite direction, the valve stem 9 drives the valve disc 2 to move upward and disengage from the sealing surface, the fluid channel 4 is opened, realizing the on / off control of the pipeline medium; when the valve disc 2 moves to the target position of closing the flow channel, the locking plate 20 in the actuator is activated, and the locking plate 20 will limit the connecting rod 45, thereby forming a three-level locking, effectively improving stability and practicality.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A drift-proof self-locking actuator, characterized in that The utility model provides a valve, including installation plate (6), the valve rod (9) is provided with on installation plate (6) through, the mobile plate (19) is provided with on the valve rod (9) side coaxially, the valve rod (9) is also provided with limit hole (24) symmetrically, the mobile plate (19) is provided with the stop lever (16) symmetrically, installation plate (6) is provided with rebound mechanism symmetrically, and the rebound mechanism is provided with the locating plate (21), and the locating plate (21) one side close to each other is provided with the limit rod (17), and the stop lever (16) is used for blocking limit rod (17) movement, and limit rod (17) is cooperated with limit hole (24).

2. A drift-proof self-locking actuator according to claim 1, characterized in that The utility model provides a valve, including installation plate (6), the valve rod (9) is provided with on installation plate (6) through, the mobile plate (19) is provided with on the valve rod (9) side coaxially, the valve rod (9) is also provided with limit hole (24) symmetrically, the mobile plate (19) is provided with the stop lever (16) symmetrically, installation plate (6) is provided with rebound mechanism symmetrically, and the rebound mechanism is provided with the locating plate (21), and the locating plate (21) one side close to each other is provided with the limit rod (17), and the stop lever (16) is used for blocking limit rod (17) movement, and limit rod (17) is cooperated with limit hole (24).

3. A drift prevention self-locking actuator according to claim 2, characterized in that The utility model provides a valve, including installation plate (6), the valve rod (9) is provided with on installation plate (6) through, the mobile plate (19) is provided with on the valve rod (9) side coaxially, the valve rod (9) is also provided with limit hole (24) symmetrically, the mobile plate (19) is provided with the stop lever (16) symmetrically, installation plate (6) is provided with rebound mechanism symmetrically, and the rebound mechanism is provided with the locating plate (21), and the locating plate (21) one side close to each other is provided with the limit rod (17), and the stop lever (16) is used for blocking limit rod (17) movement, and limit rod (17) is cooperated with limit hole (24).

4. The anti-walk self-locking actuator according to claim 2, wherein, The utility model provides a valve, including installation plate (6), the valve rod (9) is provided with on installation plate (6) through, the mobile plate (19) is provided with on the valve rod (9) side coaxially, the valve rod (9) is also provided with limit hole (24) symmetrically, the mobile plate (19) is provided with the stop lever (16) symmetrically, installation plate (6) is provided with rebound mechanism symmetrically, and the rebound mechanism is provided with the locating plate (21), and the locating plate (21) one side close to each other is provided with the limit rod (17), and the stop lever (16) is used for blocking limit rod (17) movement, and limit rod (17) is cooperated with limit hole (24).

5. A drift prevention self-locking actuator according to claim 4, characterized in that The utility model provides a valve, including installation plate (6), the valve rod (9) is provided with on installation plate (6) through, the mobile plate (19) is provided with on the valve rod (9) side coaxially, the valve rod (9) is also provided with limit hole (24) symmetrically, the mobile plate (19) is provided with the stop lever (16) symmetrically, installation plate (6) is provided with rebound mechanism symmetrically, and the rebound mechanism is provided with the locating plate (21), and the locating plate (21) one side close to each other is provided with the limit rod (17), and the stop lever (16) is used for blocking limit rod (17) movement, and limit rod (17) is cooperated with limit hole (24).

6. A self-locking anti-backlash actuator according to claim 5 wherein, The positioning plate (21) is provided with a cavity I (40) and a cavity II (36), the cavity II (36) is located on the upper side of the cavity I (40), a sliding groove (35) is formed on the side wall of the two cavity I (40) close to each other, the sleeve (18) is slidably connected with the sliding groove (35), the L-shaped drive rod (11) is fixedly arranged on the sleeve (18), the L-shaped drive rod (11) is slidably extended into the cavity II (36), the push air plate (37) is fixedly arranged on the upper end of the L-shaped drive rod (11), the push air plate (37) is slidably arranged in the cavity II (36), the clamping plate (20) is fixedly arranged on the upper end of the push air plate (37), and the clamping plate (20) is slidably extended out of the cavity II (36).

7. A self-locking anti-backlash actuator according to claim 6 wherein, The spring III (38) is sleeved on the clamping plate (20), one end of the spring III (38) is fixedly connected with the cavity II (36), the other end of the spring III (38) is fixedly connected with the push air plate (37), the cavity II (36) is connected with the air outlet pipe (39) in a penetrating manner, the other end of the air outlet pipe (39) is connected with the hose (23) in a penetrating manner; the through groove (41) is arranged on the positioning plate (21), the mounting block (34) is slidably arranged on the through groove (41), the air bag (15) is arranged on the mounting block (34), the gas passage is arranged in the mounting block (34), the gas passage is in communication with the air bag (15), and the hose (23) is in communication with the gas passage.

8. A self-locking anti-backlash actuator according to claim 7, wherein, The connecting rod (42) is fixedly arranged on the mounting block (34), the connecting rod (42) is slidably penetrated through the limiting rod (17), and the upper end of the connecting rod (42) is fixedly connected with the sleeve (18).

9. A stop valve comprising the anti-creep self-locking actuator according to any one of claims 1 to 8, characterized in that The valve body (1) is provided with a cavity (5), the valve cover (10) is arranged on the valve body (1), the valve rod (9) is slidably penetrated through the valve cover (10) and extended into the cavity (5), the valve rod (9) is fixedly provided with the valve clack (2) at the lower end, the fluid passage (4) is arranged in the valve body (1), and the valve clack (2) is used for controlling the on-off of the fluid passage (4).

10. A stop valve according to claim 9, wherein The mounting plate (6) is arranged on the valve cover (10), the threaded rod (7) is rotatably connected with the valve rod (9), the valve rod nut (8) is threadedly connected with the threaded rod (7), the valve rod nut (8) is fixedly connected with the valve cover (10), the hand wheel (3) is fixedly arranged on the threaded rod (7), the hand wheel (3) comprises an outer rotary ring (44), a plurality of connecting rods (45) are fixedly arranged on the inner side of the outer rotary ring (44), the other ends of the connecting rods (45) are fixedly connected with the same inner rotary ring (43), and the inner rotary ring (43) is fixedly connected with the threaded rod (7).

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