Valve actuator based on mechanical seal locking

Abstract

The present application relates to the technical field of actuator valve, in particular to a valve actuator based on mechanical sealing locking, which comprises a barrel-shaped valve upper cap, a plurality of actuator bodies fixedly arranged around the upper cap, an execution screw rod driven on each actuator body, an actuator head integrated controlled at the bottom end of each execution screw rod, and an air ring integrated arranged in the valve upper cap, and a plurality of actuator head integrations are also uniformly arranged around the valve upper cap, a plurality of valve actuators are densely distributed in the traditional technology, which are used to control a plurality of shunt valves, if a single valve actuator fails and cannot be repaired in a short time, it will cause the pipeline transportation to be out of control, and in the present application, if a single actuator body is damaged, the adjacent actuator body can remedy the shunt valve below the failed actuator body, so as to maintain the fluid conveying work, and after the fluid conveying work is completed, the failed actuator body is repaired.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of actuator valves, in particular to a valve actuator based on mechanical sealing locking. BACKGROUND

[0002] An actuator is an important component of an automatic control system, which functions to accept control signals from a controller, change the size of the controlled medium, and thus maintain the controlled variable at the required value or within a certain range. Actuators can be classified into three categories according to their energy forms: pneumatic, hydraulic, and electric.

[0003] In the prior art, multiple valves are densely distributed, and multiple valve actuators are provided at a pipeline shunt to control multiple valves. If a single valve actuator fails, the corresponding valve will lose control, and workers cannot repair it in a short time, which directly causes the loss of control of fluid transportation. If the adjacent valve actuator can control the valve of the failed actuator, such a multiple valve actuator joint design has higher market demand and higher safety performance.

[0004] In addition, the valve seals the pipeline port by a cover, and sufficient elastic pressure needs to be applied to the cover to prevent leakage due to insufficient sealing pressure. As the use time increases, the structure that applies the elastic force will gradually experience elastic fatigue, and thus the elastic force will decrease. Therefore, the valve cover pressing mechanism needs to be improved to completely solve the problem of insufficient valve sealing caused by elastic fatigue. Therefore, the present application provides a valve actuator based on mechanical sealing locking. SUMMARY

[0005] The present application aims to provide a valve actuator based on mechanical sealing locking to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a valve actuator based on mechanical sealing locking, comprising a barrel-shaped valve upper cap, a plurality of actuator bodies fixedly arranged around the upper cap, an execution screw driven on each actuator body, an actuator head integrated controlled at the bottom end of each execution screw, and a gas ring integrated arranged around the inside of the valve upper cap. The plurality of actuator head integrations are also uniformly arranged around the valve upper cap. A three-way main pipe is fixedly connected below the valve upper cap. A plurality of shunt pipes are arranged inside the three-way main pipe. Each actuator head integration seals and controls the port of one shunt pipe. When a single actuator body fails, the control of the actuator head integration below it is lost, and the adjacent actuator body controls the actuator head integration below the failed actuator body.

[0007] The head integration includes a cover head device connected to the bottom end of the execution screw, a guide device guiding the cover head device to lift, a unit gas device ringed outside the cover head device, a split worm for driving the guide device, and a hand control switch for clamping the split worm;

[0008] The gas ring integration includes a plurality of flat tubes ringed inside the valve cap, a three-way branch pipe fixedly connected between two adjacent flat tubes, and an impeller distributed between the ports of two adjacent flat tubes, and the two flat tubes respectively spray fluid towards the two sides of the impeller to drive the impeller to rotate forward or reverse, the impeller is fixed at the end of the split worm, and one port of the three-way branch pipe is in communication with the unit gas device.

[0009] The cover head device includes a middle seat block screwed with the execution screw, a half cylinder fixed on both sides of the middle seat block, a piston disc group fixed at the bottom end of the two half cylinders, a bowl-shaped cover movably sleeved below the piston disc group, and a spring part supported between the piston disc group and the bowl-shaped cover, and the bowl-shaped cover is clamped into the half cylinder by a fixed half disc slider.

[0010] The hand control switch includes a Z-shaped clamping plate sliding through the notch hole of the valve cap shell, a handle shaft supported at one end of the Z-shaped clamping plate, a cam disc fixedly sleeved outside the handle shaft, a handle fixed at one end of the handle shaft, an L-shaped pile for lifting the cam disc, and a C-shaped spring sheet fixed on the L-shaped pile, the C-shaped spring sheet pushes the Z-shaped clamping plate to make the other end of the Z-shaped clamping plate clamped into the groove formed on the outer side wall of the split worm, the L-shaped pile is fixed outside the valve cap, and the cam disc is composed of two half disc bodies with different sizes.

[0011] The guide device includes a ring frame fixed on the valve cap, a double-control ring cylinder movably sleeved in the circular hole of the ring frame, and two rod columns fixedly ringed below the double-control ring cylinder, the rod columns are in sliding contact with the inner wall of the half cylinder, the double-control ring cylinder is externally meshed and driven by a fixed ring worm, and the split worm is movably sleeved in the small hole of the ring frame.

[0012] The unit gas device includes a concave ring shell fixedly communicated with the three-way branch pipe, a ring cylinder baffle movably sleeved with the concave ring shell to form a ring box, an L-shaped hard pipe penetrating part of the shell of the ring cylinder baffle at one end, and a straight hard pipe slidingly inserted by the other end of the L-shaped hard pipe.

[0013] The piston disc group includes a plug flow disc for piston sliding in the bowl-shaped cover, a one-way valve spring sheet fixed on the bottom surface of both sides of the plug flow disc, and a valve box fixedly communicated with the straight hard pipe, the half cylinder is fixedly connected with the plug flow disc, two flow guide holes are ringed at the edge position of the plug flow disc, and a disc body is arranged on the one-way valve spring sheet to cover the flow guide holes, and the flow guide hole for conveying fluid to the outside of the bowl-shaped cover is fixedly communicated with the valve box.

[0014] The elastic component comprises a barrel shell clamped in a disc groove in the middle of the push flow disc, a plurality of spring pieces arranged in a ring between the barrel shell and the bowl-shaped cover, one hemisphere correspondingly arranged below every two spring pieces, a long shaft gear driving the barrel shell, a force collecting device collecting the kinetic energy of the piston movement of the push flow disc, and a ring group device establishing linkage between the force collecting device and the long shaft gear, the hemisphere is fixed on the bowl-shaped cover, and the spring pieces are switched by the spring pieces supported by the hemisphere through a surrounding movement.

[0015] The spring piece comprises a unit column fixed at one end on the barrel shell, a spring sleeved outside the unit column, and a telescopic barrel buckled at the other end of the unit column, and the hemisphere is padded between the encountered telescopic barrel and the bottom plate of the bowl-shaped cover.

[0016] The ring group device comprises a force releasing ring cylinder arranged in the bowl-shaped cover, a pressure releasing ring cylinder arranged inside the force releasing ring cylinder, a ring-shaped clockwork connected between the pressure releasing ring cylinder and the force releasing ring cylinder, and a plurality of elastic clamps clamped outside the force releasing ring cylinder.

[0017] The pressure releasing ring cylinder and the force releasing ring cylinder are movably clamped at one end in two ring grooves opened on the bottom surface of the bowl-shaped cover, the elastic clamps are installed on the bowl-shaped cover and elastically clamped with the grooves opened on the outer sidewall of the force releasing ring cylinder, the long shaft gear is provided with a T-shaped cylindrical body at one end to be movably sleeved in a T-shaped circular groove opened on the bowl-shaped cover, the long shaft gear is in meshing transmission with the external gear ring fixed on the barrel shell, and the long shaft gear is also in meshing transmission with the external gear ring fixed on the force releasing ring cylinder.

[0018] The force collecting device comprises a power collecting worm in meshing transmission with a ring-shaped worm gear fixed outside the pressure releasing ring cylinder, a limiting seat supporting the power collecting worm, a reversing shaft also supported on the limiting seat, a one-way bearing fixed on the reversing shaft, a ring cylinder gear fixed outside the one-way bearing, and a rack fixed on the push flow disc, the power collecting worm is fixed at the end with a gear to be in meshing transmission with the ring cylinder gear, and the reversing shaft is fixed at the end with a gear to be in meshing transmission with the rack, and the limiting seat is fixed on the bowl-shaped cover.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] 1. In the traditional technology, multiple valve actuators are densely distributed and designed to control multiple shunt valves. If a single valve actuator fails and cannot be repaired in a short time, it will cause the pipeline transportation to be out of control. In the present application, if a single actuator body is damaged, the adjacent actuator body can be used to control the shunt valve below the faulty actuator body, so as to maintain the fluid transportation work, and after the fluid transportation work is completed, the faulty actuator body is repaired.

[0021] 2. The invention realizes valve control by blocking the port of the shunt pipe with the bowl-shaped cover, the elastic component exerts elastic force on the bowl-shaped cover, the internal elastic element of the elastic component can be actively controlled to switch, to prevent the problem of elastic fatigue caused by long-term pressure exertion of a single elastic element, by updating the elastic element, so that the bowl-shaped cover is subjected to sufficient elastic pressure, so that the bowl-shaped cover and the shunt pipe have sufficient sealing pressure. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the invention.

[0023] Figure 2 It is a schematic diagram of the internal structure of the invention.

[0024] Figure 3 It is a schematic diagram of the shunt pipe position.

[0025] Figure 4 It is a schematic diagram of the actuator body position.

[0026] Figure 5 It is a schematic diagram of the head integrated structure.

[0027] Figure 6 It is a schematic diagram of the gas ring integrated structure.

[0028] Figure 7 It is a schematic diagram of the bowl-shaped cover position.

[0029] Figure 8 It is a schematic diagram of the hand control switch structure.

[0030] Figure 9 It is a schematic diagram of the guiding device structure.

[0031] Figure 10 It is a schematic diagram of the unit gas appliance structure.

[0032] Figure 11 It is a schematic diagram of the piston disc group structure.

[0033] Figure 12 It is a schematic diagram of the elastic component structure.

[0034] Figure 13 It is a schematic diagram of the ring group structure.

[0035] Figure 14 It is a schematic diagram of the force generating device structure.

[0036] In the diagram: 1. Valve cap; 2. Actuator body; 3. Actuating screw; 4. Actuator head assembly; 5. Gas ring assembly; 6. Tee main pipe; 7. Diverter pipe; 8. Cover device; 9. Guide device; 10. Unit gas appliance; 11. Positioning worm gear; 12. Hand switch; 13. Flat pipe; 14. Tee branch pipe; 15. Impeller; 16. Middle seat block; 17. Half cylinder; 18. Piston disc assembly; 19. Cup-shaped cover; 20. Spring component; 21. Handle; 22. Handle shaft; 23. Cam disc; 24. C-type spring; 25. L-type post; 26. Z-type clamping plate; 27. Ring frame; 28. Double-control ring cylinder; 29. ​​Rod column; 20. Ring cylinder stop. Plate 30, concave ring shell 31, L-shaped rigid tube 32, straight rigid tube 33, valve box 34, push plate 35, one-way valve spring 36, force generator 37, cylindrical shell 38, hemisphere 39, spring component 40, ring assembly 41, long shaft gear 42, unit column 43, spring 44, telescopic barrel 45, pressure ring cylinder 46, elastic clamp 47, rectangular clamping plate 471, positioning seat 472, unit spring 473, annular spring 48, force release ring cylinder 49, collector worm gear 50, reversing shaft 51, limit seat 52, one-way bearing 53, ring cylinder gear 54, rack 55. Detailed Implementation

[0037] 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 technical solutions 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.

[0038] Please see Figures 1 to 14 This invention provides a technical solution: a valve actuator based on mechanical seal locking, comprising a barrel-shaped valve cap 1, multiple actuator bodies 2 fixedly arranged around the top of the valve cap 1, an actuator screw 3 driven by each actuator body 2, a head assembly 4 controlled by the bottom of each actuator screw 3, and an air ring assembly 5 arranged inside the valve cap 1. The multiple head assemblies 4 are also evenly arranged around the valve cap 1. A three-way main pipe 6 is fixedly connected to the bottom of the valve cap 1. Multiple branch pipes 7 are arranged inside the three-way main pipe 6. Each head assembly 4 blocks and controls the port of one branch pipe 7. If a single actuator body 2 fails, it loses control of the head assembly 4 below it. The adjacent actuator body 2 can remedy the situation by controlling the head assembly 4 below the failed actuator body 2.

[0039] The device head integration 4 includes a cover device 8 connected to the bottom end of the actuator screw 3, a guide device 9 for guiding the cover device 8 to rise and fall, a unit gas device 10 surrounding the cover device 8, a positioning worm gear 11 for driving the guide device 9, and a hand control switch 12 for locking the positioning worm gear 11.

[0040] The air ring assembly 5 includes multiple flat tubes 13 ringed inside the valve cap 1, a three-way branch pipe 14 fixedly connected between two adjacent flat tubes 13, and an impeller 15 distributed between the ports of two adjacent flat tubes 13. The two flat tubes 13 spray fluid toward both sides of the impeller 15 to drive the impeller 15 to rotate forward or backward. The impeller 15 is fixed to the end of the worm gear 11. One port of the three-way branch pipe 14 is connected to the unit air appliance 10.

[0041] Reference Appendix Figure 6 Understandably, the cover device 8 includes a central seat block 16 screwed to the actuator screw 3, two half-cylinders 17 fixed on both sides of the central seat block 16, a piston disc assembly 18 fixed to the bottom of the two half-cylinders 17, a bowl-shaped cover 19 movably sleeved below the piston disc assembly 18, and an elastic component 20 supported between the piston disc assembly 18 and the bowl-shaped cover 19. The bowl-shaped cover 19 is engaged into the half-cylinders 17 by fixing half-disc sliders.

[0042] Reference Appendix Figure 8 The manual switch 12 includes a Z-shaped locking plate 26 that slides through a prism hole in the valve cap 1 housing, a handle shaft 22 supported at one end of the Z-shaped locking plate 26, a cam disc 23 fixedly sleeved on the outside of the handle shaft 22, a handle 21 fixed at one end of the handle shaft 22, an L-shaped post 25 for supporting the cam disc 23, and a C-shaped spring 24 fixed on the L-shaped post 25. The C-shaped spring 24 pushes the Z-shaped locking plate 26 so that the other end of the Z-shaped locking plate 26 is engaged in a groove on the outer wall of the worm gear 11. The L-shaped post 25 is fixed to the outside of the valve cap 1. The cam disc 23 is composed of two half-discs of different sizes fixedly spliced ​​together.

[0043] When a single actuator body 2 loses control of the lower head assembly 4, an adjacent actuator body 2 is needed to provide supplementary drive. This allows for short-term control of the head assembly 4 below the faulty actuator body 2. After the valve operation is completed, disassembly and maintenance are performed. To establish control of the head assembly 4 below the faulty actuator body 2 by an adjacent actuator body 2, the corresponding manual switch 12 below the faulty actuator body 2 needs to be turned on. This allows the worm gear 11 to rotate. Specifically, the handle 21 is turned, which drives the handle shaft 22 to rotate. The handle shaft 22 is located between the two lugs at the top of the Z-shaped clamping plate 26, and the handle shaft 22 is movable. The moving sleeve is connected to the through hole opened on the ear plate. The handle shaft 22 drives the cam disk 23 to rotate. Originally, the small half of the cam disk 23 was in contact with the L-shaped post 25. After the cam disk 23 rotates, the large half of the cam disk 23 is in contact with the L-shaped post 25. The L-shaped post 25 is fixed and pushes the cam disk 23 in the opposite direction. The cam disk 23, handle shaft 22 and Z-shaped clamping plate 26 rise synchronously. During the process, it overcomes the support and obstruction of the C-shaped spring 24. After the bottom end of the Z-shaped clamping plate 26 rises, it is pulled out from the split worm gear 11. The split worm gear 11 can then rotate. In this way, the transmission path is established between the actuator head integration 4 below the faulty actuator body 2 and the adjacent actuator body 2.

[0044] Reference Appendix Figure 9 The guide device 9 includes a ring frame 27 fixed on the valve cap 1, a double-control ring cylinder 28 movably sleeved in a circular hole on the ring frame 27, and two fixed rods 29 arranged around the bottom of the double-control ring cylinder 28. The rods 29 slide in contact with the inner wall of the semi-cylinder 17. The double-control ring cylinder 28 is driven by a fixed annular worm gear meshing with the positioning worm 11, and the positioning worm 11 is movably sleeved in a small hole on the ring frame 27.

[0045] Under normal operating conditions, the worm gear 11 is locked in place by the Z-shaped clamping plate 26 and remains stationary. The worm gear 11 locks the double-control ring cylinder 28, thereby keeping the control rod 29 stationary. The rod 29 acts as a guide, thus stabilizing the lifting and lowering of the semi-cylinder 17. The actuator screw 3 passes through the middle of the double-control ring cylinder 28. The outer wall of the double-control ring cylinder 28 has an annular groove structure, so the double-control ring cylinder 28 can rotate or remain stationary under the support of the ring frame 27. That is, when there is no malfunction in the actuator body 2, the double-control ring cylinder 28 remains stationary. When the actuator body 2 malfunctions, the lower worm gear 11 is released, which can drive the double-control ring cylinder 28 to rotate.

[0046] Reference Appendix Figure 10Understanding: Unit gas appliance 10 includes a concave annular shell 31 fixedly connected to a three-way branch pipe 14, an annular baffle 30 movably sleeved with the concave annular shell 31 to form an annular box, an L-shaped rigid pipe 32 with one end penetrating a portion of the annular baffle 30, and a straight rigid pipe 33 slidably inserted into the other end of the L-shaped rigid pipe 32. The space between the three-way branch pipe 14 and the concave annular shell 31 remains stationary. If the piston disc assembly 18 rotates, the straight rigid pipe 33 and the L-shaped rigid pipe 32 rotate accordingly. The fluid channel between the three-way branch pipe 14, the annular box, and the L-shaped rigid pipe 32 remains stable. If the piston disc assembly 18 rises or falls, the straight rigid pipe 33 will rise or fall accordingly, while the L-shaped rigid pipe 32 can remain relatively stationary.

[0047] Reference Appendix Figure 11 Understanding the piston disk assembly 18, it includes a thruster disk 35 that slides within a bowl-shaped cover 19, one-way valve springs 36 fixed on both sides of the bottom surface of the thruster disk 35, and a valve box 34 fixedly connected to the straight rigid pipe 33. The semi-cylinder 17 is fixedly connected to the thruster disk 35. Two guide holes are arranged around the edge of the thruster disk 35, and a disk body is provided on the one-way valve spring 36 to cover the guide holes. The guide holes for conveying fluid to the outside of the bowl-shaped cover 19 are fixedly connected to the valve box 34. When the piston slides within the bowl-shaped cover 19, the thruster disk 35 provides power for fluid delivery, which is... Figure 11 As the pusher plate 35 descends, it squeezes out the fluid inside the bowl-shaped cover 19, and the fluid is discharged and transported away through the straight rigid pipe 33. As the pusher plate 35 rises, the fluid outside the bowl-shaped cover 19 is drawn into the bowl-shaped cover 19 through the guide hole on the right side. As the pusher plate 35 rises and falls continuously, fluid will be continuously transported away through the straight rigid pipe 33.

[0048] Reference Appendix Figure 2 Understanding: fluid is injected from the right port of the tee main pipe 6, and then discharged through four branch pipes 7. Whether fluid is discharged from each branch pipe 7 is controllable, that is, the attached... Figure 6 When the bowl-shaped cover 19 rises, the inlet of the diversion pipe 7 is exposed, allowing the fluid in the tee pipe 6 to drain away through the diversion pipe 7. Conversely, when the bowl-shaped cover 19 falls to block the diversion pipe 7, the fluid is intercepted.

[0049] Under normal circumstances, the lifting and lowering control of the cup-shaped cover 19 is as follows: the actuator body 2 drives the actuator screw 3 to rotate, causing the middle seat block 16 to rise and fall, which in turn drives the piston disc assembly 18 through the semi-cylinder 17. The upper two sides of the cup-shaped cover 19 hook onto the piston disc assembly 18, and the elastic component 20 expands fully between the piston disc assembly 18 and the cup-shaped cover 19. Thus, the lifting and lowering of the piston disc assembly 18 will drive the lifting and lowering of the cup-shaped cover 19. If the actuator body 2 at the drive source is damaged, but the cup-shaped cover 19 below the faulty actuator body 2 still needs to be raised and lowered for a short period of time, then remedial control measures can be taken. That is, open the hand switch 12 below the faulty actuator body 2, and as previously mentioned, turn the handle 21 to allow the worm gear 11 to rotate freely. The normal actuator body 2 adjacent to the faulty actuator body 2 drives the actuator screw 3 below it. The piston plate assembly 18 below the normal actuator body 2 descends, while the cup-shaped cover 19 is blocked by the diversion pipe 7. Then the piston plate assembly 18 rises, and the piston slides inside the cup-shaped cover 19. As mentioned before, the piston movement of the piston plate assembly 18 will cause some fluid to be transported, that is, fluid will be continuously discharged through the straight rigid pipe 33, and then through the L-shaped rigid pipe 32 and the internal channel of the ring box, and then through the three-way branch pipe 14. The fluid in the three-way branch pipe 14 is injected into the flat pipe 13 and discharged through the two ports of the flat pipe 13. During the discharge, the fluid impacts the impeller 15. At this time, only the impeller 15 below the faulty actuator body 2 can rotate freely. Thus, the impeller 15 below the faulty actuator body 2 rotates in one direction. The impeller 15 drives the worm gear 11, which in turn drives the double-controlled ring cylinder 28 to rotate. Subsequently, the rod 29 drives the semi-cylinder 17 to rotate. The faulty actuator body 2 loses control over the rotation of the actuator screw 3. The actuator screw 3 remains stationary. The semi-cylinder 17 drives the middle seat block 16 to rotate. The rotating middle seat block 16 can still rise and fall. Subsequently, the semi-cylinder 17, piston disc assembly 18 and cup-shaped cover 19 rise and fall together. Thus, the cup-shaped cover 19 below the faulty actuator body 2 can still achieve lifting and lowering control, but the driving source becomes the normal actuator body 2 adjacent to the faulty actuator body 2.

[0050] The elastic component 20 provides elastic support between the piston disc assembly 18 and the cup-shaped cover 19. The elastic component 20 prevents a single elastic component from being compressed for a long time and thus causing elastic fatigue by automatically replacing the elastic component inside.

[0051] The elastic component 20 includes a cylindrical shell 38 that is inserted into a groove in the middle of the push plate 35, multiple springs 40 arranged around the cylindrical shell 38 and the bowl-shaped cover 19, a hemisphere 39 correspondingly arranged below each pair of springs 40, a long shaft gear 42 that drives the cylindrical shell 38, a force generator 37 that collects the piston motion energy of the push plate 35, and a ring assembly 41 that establishes a linkage between the force generator 37 and the long shaft gear 42. The hemisphere 39 is fixed on the bowl-shaped cover 19, and the springs 40 switch the springs 40 supported by the hemisphere 39 through a circumferential motion.

[0052] Spring component 40 includes a unit post 43 with one end fixed to the cylindrical shell 38, a spring 44 sleeved on the outside of the unit post 43, and a telescopic barrel 45 that slides onto the other end of the unit post 43. A hemisphere 39 is placed between the telescopic barrel 45 and the bottom plate of the bowl-shaped cover 19. (See attached diagram) Figure 13 It is understood that the telescopic barrel 45 can slide and rise at the bottom of the unit column 43, the spring 44 is supported between the telescopic barrel 45 and the cylindrical shell 38, and applies elastic force to the telescopic barrel 45, and a pressure relief hole is opened on the side shell of the telescopic barrel 45.

[0053] The ring assembly 41 includes a release ring cylinder 49 encircled in the bowl-shaped cover 19, a pressure ring cylinder 46 encircled inside the release ring cylinder 49, an annular spring 48 connecting the pressure ring cylinder 46 and the release ring cylinder 49, and a plurality of elastic clamps 47 encircled and engaged outside the release ring cylinder 49.

[0054] The pressure ring cylinder 46 and the force-releasing ring cylinder 49 each have one end that is movably engaged in two annular grooves on the bottom surface of the bowl-shaped cover 19. The elastic clamp 47 is installed on the bowl-shaped cover 19 and elastically engages with a groove on the outer wall of the force-releasing ring cylinder 49. One end of the long-shaft gear 42 is provided with a T-shaped cylinder that movably fits into a T-shaped groove on the bowl-shaped cover 19. The long-shaft gear 42 meshes with an external gear ring fixed on the cylindrical shell 38, and also meshes with an external gear ring fixed on the force-releasing ring cylinder 49. (See attached diagram.) Figure 13 It is understood that the edge of the pressure ring 46, which is embedded in the annular groove of the bowl-shaped cover 19, is folded over, thus limiting the space of the pressure ring 46. Similarly, the force release ring 49 also adopts such a limiting design. The elastic clamp 47 includes a dividing seat 472 fixed on the bowl-shaped cover 19, a rectangular clamping plate 471 that slides through a square hole in the dividing seat 472, and a unit spring piece 473 fixed on the dividing seat 472. The unit spring piece 473 rests on the rectangular clamping plate 471 to apply elastic force. One end of the rectangular clamping plate 471 is a convex arc surface, and the convex arc surface end is inserted into the groove on the outer wall of the force release ring 49.

[0055] The power generating device 37 includes a worm gear 50 that meshes with a fixed annular worm gear on the outside of the pressure ring cylinder 46, a limiting seat 52 supporting the worm gear 50, a reversing shaft 51 also supported on the limiting seat 52, a one-way bearing 53 fixedly sleeved on the reversing shaft 51, an annular gear 54 fixedly sleeved on the outside of the one-way bearing 53, and a rack 55 fixed on the push plate 35. The gear fixed at the end of the worm gear 50 meshes with the annular gear 54, and the gear fixed at the end of the reversing shaft 51 meshes with the rack 55. The limiting seat 52 is fixed on the bowl-shaped cover 19.

[0056] As previously mentioned, the piston of the pusher plate 35 inside the bowl-shaped cover 19 is driven by an external drive. The piston sliding of the pusher plate 35 provides power for the switching of the elastic component. Specifically, the pusher plate 35 drives the rack 55 to move synchronously. The reciprocating motion of the rack 55 drives the reversing shaft 51 to rotate, which then drives the ring barrel gear 54 to rotate in one direction through the one-way bearing 53. Subsequently, the worm gear 50 drives the pressure ring barrel 46 to rotate. The rotation of the pressure ring barrel 46 causes the annular spring 48 to contract and store power, which in turn causes the release ring barrel 49 to have a rotational tendency. If the force is large enough, the elastic locking position of the elastic clamp 47 is broken, so the force-releasing ring cylinder 49 rotates to a fixed angle and is then locked by the elastic clamp 47 again. The force-releasing ring cylinder 49 drives the long shaft gear 42, which in turn drives the cylindrical shell 38 to rotate, causing all the springs 40 to move synchronously around. In this way, the cylindrical shell 38 changes the pushing springs 40, and the springs 44 in the released springs 40 can naturally extend, preventing the springs 44 from being compressed for a long time and causing elastic fatigue, and avoiding insufficient sealing caused by the decrease in the elastic force applied to the cup-shaped cover 19.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve actuator based on mechanical seal locking, characterized in that, The device includes a barrel-shaped valve cap, multiple actuator bodies fixedly arranged around the top of the valve cap, an actuator screw corresponding to each actuator body, a head assembly controlled at the bottom of each actuator screw, and an air ring assembly arranged inside the valve cap. The multiple head assemblies are also evenly arranged around the valve cap. A three-way main pipe is fixedly connected to the bottom of the valve cap. Multiple branch pipes are arranged inside the three-way main pipe. Each head assembly blocks and controls the port of one branch pipe. If a single actuator body fails, it loses control of the head assembly below it. The adjacent actuator body can then remedy the situation by controlling the head assembly below the failed actuator body. The device head integration includes a cover device connected to the bottom end of the actuator screw, a guide device for guiding the cover device to rise and fall, a unit pneumatic device surrounding the cover device, a worm gear for driving the guide device, and a hand control switch for locking the worm gear. The air ring assembly includes multiple flat tubes ringed inside the valve cap, a three-way branch pipe fixedly connected between two adjacent flat tubes, and an impeller distributed between the ports of two adjacent flat tubes. The two flat tubes spray fluid toward both sides of the impeller to drive the impeller to rotate forward or backward. The impeller is fixed to the end of the worm gear. One port of the three-way branch pipe is connected to the unit air appliance. The cover device includes a central block screwed to the actuator screw, two half-cylinders fixed on both sides of the central block, a piston disc assembly fixed at the bottom of the two half-cylinders, a bowl-shaped cover movably sleeved under the piston disc assembly, and an elastic component supporting the piston disc assembly and the bowl-shaped cover. The bowl-shaped cover is inserted into the half-cylinder by a fixed half-disc slider. The guiding device includes a ring frame fixed on the valve cap, a double-control ring cylinder movably sleeved in a circular hole on the ring frame, and two fixed rods arranged around the bottom of the double-control ring cylinder. The rods slide in contact with the inner wall of the half cylinder. The double-control ring cylinder is driven by a fixed annular worm gear meshing with a locating worm gear, and the locating worm gear is movably sleeved in a small hole on the ring frame. The unit gas appliance includes a concave annular shell that is fixedly connected to a three-way branch pipe, an annular baffle that is movably sleeved with the concave annular shell to form an annular box, an L-shaped rigid pipe that penetrates part of the shell of the annular baffle at one end, and a straight rigid pipe that is slidably inserted into the other end of the L-shaped rigid pipe.

2. A valve actuator based on mechanical seal locking according to claim 1, characterized in that: The manual switch includes a Z-shaped locking plate that slides through a prism hole in the valve cap housing, a handle shaft supported at one end of the Z-shaped locking plate, a cam disc fixedly sleeved on the outside of the handle shaft, a handle fixed at one end of the handle shaft, an L-shaped post for supporting the cam disc, and a C-shaped spring piece fixed on the L-shaped post. The C-shaped spring piece pushes the Z-shaped locking plate so that the other end of the Z-shaped locking plate is engaged in a groove on the outer wall of the worm gear. The L-shaped post is fixed to the outside of the valve cap. The cam disc is composed of two half-discs of different sizes fixedly spliced ​​together.

3. A valve actuator based on mechanical seal locking according to claim 1, characterized in that: The piston disc assembly includes a pusher disc for piston sliding in a bowl-shaped cover, one-way valve springs fixed on both sides of the bottom surface of the pusher disc, and a valve box fixedly connected to the straight rigid pipe. The half-cylinder and the pusher disc are fixedly connected. Two guide holes are arranged around the edge of the pusher disc, and a disc body is provided on the one-way valve spring to cover the guide holes. The guide holes for conveying fluid to the outside of the bowl-shaped cover are fixedly connected to the valve box.

4. A valve actuator based on mechanical seal locking according to claim 3, characterized in that: The elastic component includes a cylindrical shell that is fitted into a groove in the middle of the push plate, multiple springs arranged around the cylindrical shell and the bowl-shaped cover, a hemisphere corresponding to each pair of springs, a long shaft gear that drives the cylindrical shell, a force generator that collects the energy of the piston movement of the push plate, and a ring assembly that establishes a linkage between the force generator and the long shaft gear. The hemisphere is fixed on the bowl-shaped cover, and the springs switch the springs supported by the hemispheres through a circumferential movement.

5. A valve actuator based on mechanical seal locking according to claim 4, characterized in that: The spring component includes a unit column with one end fixed to the cylindrical shell, a spring sleeved on the outside of the unit column, and a telescopic barrel that slides onto the other end of the unit column. A hemispherical pad is placed between the telescopic barrel and the bowl-shaped bottom plate.

6. A valve actuator based on mechanical seal locking according to claim 4, characterized in that: The ring assembly includes a release ring cylinder encircled in a bowl-shaped cap, a pressure ring cylinder encircled inside the release ring cylinder, an annular spring connecting the pressure ring cylinder and the release ring cylinder, and multiple elastic clamps encircled and engaged outside the release ring cylinder.

7. A valve actuator based on mechanical seal locking according to claim 6, characterized in that: The pressure ring cylinder and the force release ring cylinder each have one end that is movably engaged in two annular grooves on the bottom surface of the bowl-shaped cover. The elastic clamp is installed on the bowl-shaped cover and is elastically engaged with the groove on the outer wall of the force release ring cylinder. One end of the long shaft gear is provided with a T-shaped cylinder that is movably fitted into the T-shaped circular groove on the bowl-shaped cover. The long shaft gear meshes with the external gear ring fixed on the cylindrical shell and also meshes with the external gear ring fixed on the force release ring cylinder.

8. A valve actuator based on mechanical seal locking according to claim 6, characterized in that: The power generating device includes a worm gear that meshes with a fixed annular worm gear on the outside of the pressure ring cylinder, a limiting seat supporting the worm gear, a reversing shaft also supported on the limiting seat, a one-way bearing fixed on the reversing shaft, an annular gear fixed on the outside of the one-way bearing, and a rack fixed on the push plate. A fixed gear at the end of the worm gear meshes with the annular gear, and a fixed gear at the end of the reversing shaft meshes with the rack. The limiting seat is fixed on the bowl-shaped cover.

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