Air-tight seal integral swash plate check valve

Abstract

The invention discloses an air-tight seal integral swash plate check valve, and relates to the technical field of fluid valves. The problems that a traditional check valve is poor in sealing performance, short in service life, low in operation flexibility and the like are solved. By introducing a retarding reset spring and a buffering lead screw, the damage of impact force to the valve clack is obviously reduced; the pneumatic pump provides a positive pressure environment to improve the sealing effect; flexible switching of flow paths is achieved through the three-way switching design; and meanwhile, automatic and manual operation is supported. The air pressure in the pressure maintaining shell is monitored in real time, and the system safety is ensured. The valve is reasonable in structure, rich in function and suitable for efficient fluid conveying and control under complex working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of fluid valves, in particular to an air-sealed integral inclined disc check valve. Background Art

[0002] Traditional check valves usually rely on a single spring or gravity to achieve the resetting and sealing of the valve disc, and are widely used in fluid delivery systems. However, these designs show significant deficiencies when facing high-pressure or high-speed fluids. The sealing performance of traditional check valves in high-pressure and impact fluid environments is often difficult to fully meet the requirements. This is mainly because the connection between the valve body and the valve stem is in a movable connection state, so it is easy to release pressure. In addition, the structure of the existing check valve usually does not have a special buffer design. When the valve disc is closed, it directly contacts the sealing surface and is directly impacted by the kinetic energy of the fluid. This situation is not only prone to deformation of the valve disc and wear of the sealing surface, but may also cause local stress concentration and shorten the service life of the valve. For high-speed flow or pulse fluid environments, this impact force will be further amplified and may even cause mechanical failure of the valve. In addition, the traditional design lacks deceleration control of the valve disc movement. When the flow is suddenly interrupted, the impact force of the rapid closure of the valve disc often causes pipeline vibration and noise, affecting the stability and comfort of the overall system. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: an air-sealed integral inclined disc check valve, including a pressure-maintaining shell, a connecting pipe is coaxially fixed inside the pressure-maintaining shell, a closed ring is obliquely arranged in the middle of the connecting pipe, a valve disc is contact-sealed inside the closed ring, the valve disc rotates eccentrically on the connecting pipe through a rotating shaft, and the rotating shaft does not intersect with the axis of the connecting pipe, a push-pull rocker arm is rotatably installed on the outer side of the connecting pipe, the push-pull rocker arm and the valve disc are fixed and rotated synchronously by the rotating shaft, wherein an avoidance slide groove is arranged on the inner side of the closed ring away from the rotation axis of the valve disc, so as to facilitate the valve disc to swing out of the closed ring; a frame-type plate frame is slidingly sleeved on the outer surface of the connecting pipe, and two parallel guide slide rods are fixedly installed on the frame-type plate frame, the guide slide rods and the connecting pipe are relatively slidably arranged, and each guide slide rod is surrounded by a slow-reset spring for driving the valve disc to swing and reset.

[0004] Preferably, a guide slide rod bracket is slidably sleeved on each guide slide rod, the guide slide rod bracket is fixedly matched with the connecting pipe, and both ends of the deceleration return spring are fixedly matched with the frame plate frame and the guide slide rod bracket.

[0005] Preferably, a push-pull connecting rod is slidably installed on one side of the frame-type plate frame away from the guide slide rod bracket, the push-pull connecting rod is vertically arranged on the side of the frame-type plate frame, and the push-pull connecting rod is movably connected to the push-pull swing rod to drive the push-pull swing rod to swing.

[0006] Preferably, an air pressure pump is fixed on the outer surface of the pressure maintaining shell, and the exhaust port of the air pressure pump is connected to the interior of the pressure maintaining shell to increase the pressure inside the pressure maintaining shell. A detection nozzle is also provided on the side of the pressure maintaining shell, and an air pressure sensor is provided inside the detection nozzle to detect the pressure inside the pressure maintaining shell.

[0007] Preferably, two ends of the connecting pipe are respectively fixedly connected with a three-way pipe and a series pipe, wherein a switching chamber is arranged at the center of the three-way pipe, the switching chamber is located at the intersection of the three pipes of the three-way pipe, and a switching block is provided for rotating sealing in the switching chamber, and a three-way switching channel is arranged inside the switching block for switching the flow path of the fluid inside the three-way pipe; wherein a rotating gear disc is rotatably installed on the outer surface of the switching chamber, and the rotating gear disc and the switching block are synchronously rotated through the shaft; the pressure maintaining shell and the three-way pipe are fixed on the outer shell, and an adjusting motor is also fixed on the outer shell, and an adjusting gear meshing with the rotating gear disc is fixed on the output shaft of the adjusting motor.

[0008] Preferably, a rack is fixedly mounted on the side of the frame-type plate frame, and the rack is slidably mounted on the outer surface of the connecting pipe through a rack sliding platform, wherein a planetary gearbox bracket is also fixedly mounted on the outer surface of the connecting pipe, a planetary gearbox is fixedly mounted on the planetary gearbox bracket, a first actuator gear meshing with the rack is fixedly mounted on the output shaft of the planetary gearbox, a second actuator gear is fixedly mounted on the input shaft of the planetary gearbox, and an actuator nut gear meshing with the second actuator gear is also rotatably mounted on the planetary gearbox bracket.

[0009] Preferably, the threaded transmission at the axial position of the executive nut gear is matched with a buffer screw, and the buffer screw is slidably matched with the planetary gearbox bracket through a spline, and rubber buffer blocks are provided at both ends of the buffer screw, one of the rubber buffer blocks is directly fixed to the planetary gearbox bracket, and the other rubber buffer block is fixed on the planetary gearbox bracket through a rubber buffer block bracket.

[0010] Preferably, a toggle hand wheel is rotatably mounted on the outer surface of the pressure-maintaining shell, and the toggle hand wheel rotates synchronously with the second execution gear through a transmission shaft; a toggle gear plate is also fixed on the toggle hand wheel, and a toggle motor is also fixed on the outer surface of the pressure-maintaining shell. A toggle main gear meshing with the toggle gear plate is rotatably sleeved on the output shaft of the toggle motor, and the output shaft of the toggle motor and the toggle main gear are matched through a switching assembly.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention realizes an effective one-way check function through the cooperation of the valve disc and the closed ring. When the fluid flows in the forward direction, the valve disc automatically swings to open the channel; when the fluid flows in the reverse direction, the valve disc is forced to close to prevent backflow. Combined with the positive pressure environment provided by the air pressure pump, the pressure inside and outside the pressure-maintaining shell is consistent or slightly larger, which can effectively prevent the problem of pressure relief at the connection between the valve stem (rotating shaft) and the connecting pipe (valve body); (2) In the process of the valve disc swinging, the push-pull swing rod drives the frame plate frame to slide, thereby activating the dual buffer structure of the slow return spring and the buffer screw. This design can alleviate the impact force when the valve disc collides with the closed ring and avoid wear and deformation. Compared with the traditional structure that relies on a single spring reset, this buffer design more effectively extends the service life of the component; (3) The switching chamber and the three-way switching channel inside the three-way pipe of the present invention realize the multi-channel switching function by adjusting the motor to drive the rotating gear disc. Users can flexibly select the fluid path to meet the needs of complex working conditions; (4) The valve flap of the present invention can be automatically controlled by turning the toggle hand wheel driven by the toggle motor, and can also be adjusted by manually rotating the toggle hand wheel. This dual operation mode greatly improves the adaptability of the equipment, and can be manually operated even in the event of a power failure, ensuring the safety and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the three-way pipeline structure of the present invention.

[0014] Figure 3 It is a structural schematic diagram of the shifting gear disc of the present invention.

[0015] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0016] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point B in the middle.

[0017] Figure 6 It is a schematic diagram of the internal structure of the pressure retaining shell of the present invention.

[0018] Figure 7 It is a structural schematic diagram of the frame type plate frame of the present invention.

[0019] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point C in the middle.

[0020] Fig. 9 It is a schematic diagram of the closed loop structure of the present invention.

[0021] Fig.10It is a cross-sectional view of the valve flap structure of the present invention.

[0022] Fig.11 For the present invention Fig.10 Schematic diagram of the structure at point D in the middle.

[0023] In the figure: 101-housing; 102-three-way pipe; 103-rotating toothed disc; 104-adjusting gear; 105-adjusting motor; 106-switching chamber; 107-switching block; 108-three-way switching channel; 109-pressure-maintaining shell; 110-series pipe; 111-detection nozzle; 112-air pressure sensor; 113-air pressure pump; 114-shifting toothed disc; 115-shifting hand wheel; 116-shifting motor; 117-shifting main gear; 118-inner rotating block; 119-outer rotating sleeve; 120-pushing extrusion cylinder; 121-pushing lever; 122-expansion spring ;123-trapezoidal groove;124-connecting pipe;125-closed loop;126-guide slide rod;127-guide slide rod bracket;128-speed return spring;129-frame plate frame;130-rack;131-rack sliding table;132-planetary gearbox bracket;133-first execution gear;134-planetary gearbox;135-second execution gear;136-execution nut gear;137-rubber buffer block bracket;138-rubber buffer block;139-buffer screw;140-push-pull connecting rod;141-push-pull rocker;142-valve disc;143-avoidance slide groove. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-11 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0025] The present invention provides an air-tight integral inclined disc check valve, comprising a pressure-retaining shell 109, a connecting pipe 124 is coaxially fixed inside the pressure-retaining shell 109, a closed ring 125 is obliquely arranged in the middle of the connecting pipe 124, a valve flap 142 is arranged inside the closed ring 125 for contact sealing, the valve flap 142 is eccentrically rotated on the connecting pipe 124 through a rotating shaft, and the rotating shaft does not intersect the axis of the connecting pipe 124, a push-pull swing rod 141 is rotatably installed on the outer side of the connecting pipe 124, and the push-pull swing rod 141 and the valve flap 142 are connected by the said The rotating shaft is fixed and rotates synchronously, wherein an avoidance slide groove 143 is arranged on the inner side of the closed ring 125 away from the rotation axis of the valve disc 142, so as to facilitate the valve disc 142 to swing out of the closed ring 125; a frame-type plate frame 129 is slidably sleeved on the outer surface of the connecting pipe 124, and two parallel guide slide bars 126 are fixedly installed on the frame-type plate frame 129, and the guide slide bars 126 and the connecting pipe 124 are relatively slidably arranged, and each guide slide bar 126 is surrounded by a slow return spring 128 for driving the valve disc 142 to swing and reset. A guide slide bar bracket 127 is slidably sleeved on each guide slide bar 126, and the guide slide bar bracket 127 is fixedly matched with the connecting pipe 124, and the two ends of the slow return spring 128 are fixedly matched with the frame-type plate frame 129 and the guide slide bar bracket 127. A push-pull connecting rod 140 is slidably mounted on one side of the frame plate frame 129 away from the guide slide rod bracket 127. The push-pull connecting rod 140 is vertically arranged on the side of the frame plate frame 129, and the push-pull connecting rod 140 is movably connected to a push-pull swing rod 141 to drive the push-pull swing rod 141 to swing. An air pressure pump 113 is fixed on the outer surface of the pressure-maintaining shell 109, and the exhaust port of the air pressure pump 113 is connected to the inside of the pressure-maintaining shell 109 to increase the pressure inside the pressure-maintaining shell 109. A detection nozzle 111 is also arranged on the side of the pressure-maintaining shell 109, and an air pressure sensor 112 is arranged inside the detection nozzle 111 to detect the pressure inside the pressure-maintaining shell 109. The two ends of the connecting pipe 124 are respectively fixedly connected with a three-way pipe 102 and a series pipe 110, wherein a switching chamber 106 is arranged at the center of the three-way pipe 102, and the switching chamber 106 is located at the intersection of the three pipes of the three-way pipe 102, and a switching block 107 is provided for rotational sealing in the switching chamber 106, and a three-way switching channel 108 is arranged inside the switching block 107 for switching the flow path of the fluid inside the three-way pipe 102; wherein a rotating toothed disc 103 is rotatably installed on the outer surface of the switching chamber 106, and the rotating toothed disc 103 and the switching block 107 are synchronously rotated through the shaft; the pressure retaining shell 109 and the three-way pipe 102 are fixed on the outer shell 101, and an adjusting motor 105 is also fixed on the outer shell 101, and an adjusting gear 104 meshing with the rotating toothed disc 103 is fixed on the output shaft of the adjusting motor 105.

[0026] A rack 130 is fixedly installed on the side of the frame plate 129, and the rack 130 is slidably installed on the outer surface of the connecting pipe 124 through a rack sliding platform 131, wherein a planetary gearbox bracket 132 is also fixedly installed on the outer surface of the connecting pipe 124, and a planetary gearbox 134 is fixedly installed on the planetary gearbox bracket 132, and a first execution gear 133 meshing with the rack 130 is fixedly installed on the output shaft of the planetary gearbox 134, and a second execution gear 135 is fixedly installed on the input shaft of the planetary gearbox 134, and an execution nut gear 136 meshing with the second execution gear 135 is also rotatably installed on the planetary gearbox bracket 132. The axis position of the execution nut gear 136 is threadedly matched with a buffer screw 139, and the buffer screw 139 is slidably matched with the planetary gearbox bracket 132 through a spline. Rubber buffer blocks 138 are arranged at both ends of the buffer screw 139, one of which is directly fixed to the planetary gearbox bracket 132, and the other rubber buffer block 138 is fixed on the planetary gearbox bracket 132 through a rubber buffer block bracket 137. A toggle hand wheel 115 is also rotatably mounted on the outer surface of the pressure-retaining shell 109, and the toggle hand wheel 115 is fixed and rotated synchronously with the second execution gear 135 through a transmission shaft; a toggle toothed disc 114 is also fixed on the toggle hand wheel 115, and a toggle motor 116 is also fixed on the outer surface of the pressure-retaining shell 109, and a toggle main gear 117 meshing with the toggle toothed disc 114 is rotatably sleeved on the output shaft of the toggle motor 116, and the output shaft of the toggle motor 116 and the toggle main gear 117 are matched through a switching assembly.

[0027] The switching assembly includes an inner rotating block 118 rotatably mounted on the upper surface of the toggle main gear 117 and rotatingly matched with the output shaft of the toggle motor 116, an outer rotating sleeve 119 fixed with the output shaft of the toggle motor 116 is provided on the outer rotating block 118, and two trapezoidal grooves 123 are symmetrically arranged with beveled edges, and a pushing and extruding cylinder 120 is frictionally matched between the two beveled edges of the trapezoidal groove 123 and the inner wall of the outer rotating sleeve 119, and the two pushing and extruding cylinders 120 are elastically matched through an expansion spring 122 to drive the two pushing and extruding cylinders 120 away from each other. The opposite back surfaces of the two pushing and extruding cylinders 120 are contacted with a pushing lever 121, and all the pushing levers 121 are fixed on the toggle main gear 117.

[0028] The two ends of the three-way pipe 102 and the series pipe 110 are installed in the specified pipeline through flanges, and the output shaft of the control motor 105 drives the adjusting gear 104 to rotate, and the adjusting gear 104 rotates to drive the rotating toothed disc 103 to rotate. The rotating toothed disc 103 rotates ninety degrees each time, and the rotating toothed disc 103 drives the switching block 107 to rotate synchronously, and the three-way switching channel 108 in the switching block 107 will rotate accordingly. Figure 2As shown in the figure, the position of the three-way switching channel 108 can make the three pipes of the three-way pipe 102 in a connected state. If the switching block 107 is rotated ninety degrees, only one channel of the three-way pipe 102 can be connected (clockwise or counterclockwise). If the switching block 107 is rotated half a circle, the three-way pipe 102 is directly in a cut-off state.

[0029] The closed ring 125 and the valve flap 142 are used to prevent the pressure of the fluid to be transported from flowing back. Specifically, since the rotation axis of the valve flap 142 does not intersect with the axis of the connecting pipe 124, when the fluid flows in the connecting pipe 124 in the reverse direction, the pressures of the upper and lower parts (the upper and lower parts separated by the rotation axis) of one side of the valve flap 142 will be different, and the valve flap 142 will be closed in the connecting pipe 124 to cut off the fluid and prevent backflow. On the contrary, when the fluid flows in the forward direction, the valve flap 142 will be pushed to swing on the closed ring 125 (so that the bottom edge of the valve flap 142 slides in the avoidance chute 143), so that the connecting pipe 124 is in a connected state. In order to prevent the impact force of the fluid on the valve flap 142, a buffer is provided. When the valve flap 142 swings, it will drive the push-pull rocker arm 141 to swing. The swing of the push-pull rocker arm 141 will drive the frame plate frame 129 to slide on the connecting pipe 124 through the push-pull connecting rod 140. At the same time, the push-pull connecting rod 140 and the frame plate frame 129 will also slide relatively. The frame plate frame 129 will pull the deceleration return spring 128 to deform. At the same time, the guide slide bar 126 and the guide slide bar bracket 127 will slide relatively. In this process, the deceleration return spring 128 can start the deceleration effect. At the same time, when there is no fluid flow, the valve flap 142 and the closed ring 125 can be in a closed state under the action of the deceleration return spring 128.

[0030] When the frame plate 129 moves, it will drive the rack 130 to move, and the rack 130 will drive the first execution gear 133 to rotate. The first execution gear 133 will drive the second execution gear 135 to rotate through the planetary gearbox 134, and the second execution gear 135 will drive the execution nut gear 136 to rotate. The execution nut gear 136 drives the buffer screw 139 to move linearly. The buffer screw 139 contacts with different rubber buffer blocks 138 to achieve kinetic energy buffering and increase contact time. Since the transmission process from the valve flap 142 to the buffer screw 139 is direct transmission, when the buffer screw 139 contacts with the rubber buffer block 138, it plays a role in buffering the movement of the valve flap 142. Combined with the deceleration return spring 128, the buffering force can be further increased, which can effectively prevent the valve flap 142 and the closed ring 125 from colliding, thereby extending the closing life of the valve flap 142. In addition, the user can also manually open the valve flap 142 by rotating the hand wheel 115 to drive the second execution gear 135 to rotate, and then transmit the force in the reverse direction to the valve flap 142, thereby driving the valve flap 142 to swing. The toggle motor 116 can also be controlled to drive the toggle hand wheel 115 to rotate, and the output of the toggle motor 116 drives the outer rotating shell 119 to rotate. The rotation of the outer rotating shell 119 drives the pushing and extruding cylinder 120 to move in the opposite direction to the pushing and extruding rod 121 on the inclined surface in the trapezoidal groove 123 through friction, so that the inner wall of the outer rotating shell 119 and the inclined surface of the trapezoidal groove 123 squeeze the pushing and extruding cylinder 120, and the pushing and extruding cylinder 120 is stuck between the trapezoidal groove 123 and the outer rotating shell 119. At this time, the inner rotating block 118 and the outer rotating shell 119 will rotate synchronously, and the pushing and extruding rod 121 is set in the trapezoidal groove 123, and the pushing and extruding rod 121 is fixed on the toggle main gear 117. At this time, the toggle main gear 117 will rotate with the output shaft of the toggle motor 116, and then the toggle main gear 117 will drive the toggle The toothed disc 114 rotates, and the toothed disc 114 is moved to drive the toggle hand wheel 115 to rotate. On the contrary, when the toggle hand wheel 115 rotates actively, it will drive the toggle main gear 117 to rotate. The rotation of the toggle main gear 117 will drive the push lever 121 to rotate. The push lever 121 will toggle one of the pushing and extruding cylinders 120 to move in the direction of the other pushing and extruding cylinder 120, that is, slide downward on the inclined surface of the trapezoidal groove 123. At this time, the extrusion force of the outer rotating shell 119 and the inclined surface of the trapezoidal groove 123 on the pushing and extruding cylinder 120 disappears (the space increases), and the other symmetrical pushing and extruding cylinder 120 will also make the same movement under the action of the friction force of the outer rotating shell 119. Therefore, the rotation of the push lever 121 will drive the inner rotating block 118 to idle in the outer rotating shell 119, and it will not be able to drive the output shaft of the toggle motor 116 to rotate.In order to prevent pressure leakage at the connection between the valve flap 142 and the connecting pipe 124 when transporting high-pressure fluid, an air pressure pump 113 is installed on the pressure maintaining shell 109. The air pressure pump 113 provides positive pressure to the pressure maintaining shell 109, so that the pressure in the pressure maintaining shell 109 is the same as or slightly larger than the pressure in the connecting pipe 124, thereby preventing the pressure in the connecting pipe 124 from leaking out. The air pressure sensor 112 in the detection nozzle 111 can detect the pressure inside the pressure maintaining shell 109 in real time, so as to control the start-up state of the air pressure pump 113.

Claims

1. An air-sealed integral tilting disc check valve, characterized in that: It comprises a pressure-retaining shell (109), a connecting pipe (124) is coaxially fixed inside the pressure-retaining shell (109), a closed ring (125) is obliquely arranged in the middle of the connecting pipe (124), a valve flap (142) is arranged in a contact seal inside the closed ring (125), the valve flap (142) is eccentrically rotated on the connecting pipe (124) via a rotating shaft, and the rotating shaft does not intersect with the axis of the connecting pipe (124), a push-pull swing rod (141) is rotatably installed on the outer side of the connecting pipe (124), the push-pull swing rod (141) and the valve flap (142) are fixed and rotated synchronously via the rotating shaft, wherein an avoidance slide groove (143) is arranged on the inner side of the closed ring (125 away from the rotation axis of the valve flap (142) to facilitate the valve flap (142) to swing out of the closed ring (125); A frame-type plate frame (129) is slidably sleeved on the outer surface of the connecting pipe (124), and two parallel guide slide bars (126) are fixedly mounted on the frame-type plate frame (129). The guide slide bars (126) and the connecting pipe (124) are slidably arranged relative to each other, and a slow-return spring (128) for driving the valve flap (142) to swing and return is arranged around each guide slide bar (126).

2. The air-tight integral tilting disc check valve according to claim 1, characterized in that: A guide slide rod bracket (127) is slidably sleeved on each guide slide rod (126), the guide slide rod bracket (127) is fixedly matched with the connecting pipe (124), and both ends of the slow return spring (128) are fixedly matched with the frame plate frame (129) and the guide slide rod bracket (127).

3. The air-tight integral tilting disc check valve according to claim 2, characterized in that: A push-pull connecting rod (140) is slidably mounted on one side of the frame-shaped plate frame (129) away from the guide slide rod bracket (127). The push-pull connecting rod (140) is vertically arranged on the side of the frame-shaped plate frame (129), and the push-pull connecting rod (140) is movably connected to the push-pull swing rod (141) to drive the push-pull swing rod (141) to swing.

4. The air-tight integral tilting disc check valve according to claim 3, characterized in that: An air pressure pump (113) is fixed on the outer surface of the pressure-maintaining shell (109); an exhaust port of the air pressure pump (113) is connected to the interior of the pressure-maintaining shell (109) and is used to increase the pressure inside the pressure-maintaining shell (109); a detection nozzle (111) is also provided on the side of the pressure-maintaining shell (109); an air pressure sensor (112) is provided inside the detection nozzle (111) and is used to detect the pressure inside the pressure-maintaining shell (109).

5. The air-tight integral tilting disc check valve according to claim 4, characterized in that: The two ends of the connecting pipe (124) are respectively fixedly connected with a three-way pipe (102) and a series pipe (110), wherein a switching chamber (106) is provided at the center of the three-way pipe (102), the switching chamber (106) is located at the intersection of the three pipes of the three-way pipe (102), and a switching block (107) is provided in the switching chamber (106) in a rotating seal, and a three-way switching channel (108) is provided inside the switching block (107) for switching the three-way pipe (102). The invention relates to a flow path of an internal fluid; wherein a rotating toothed disc (103) is rotatably mounted on the outer surface of the switching chamber (106); the rotating toothed disc (103) and the switching block (107) are synchronously rotated via an axis; the pressure retaining shell (109) and the three-way pipe (102) are both fixed on the outer shell (101); an adjusting motor (105) is also fixed on the outer shell (101); and an adjusting gear (104) meshing with the rotating toothed disc (103) is fixed on the output shaft of the adjusting motor (105).

6. The air-tight integral tilting disc check valve according to claim 5, characterized in that: A rack (130) is fixedly mounted on the side of the frame plate frame (129), and the rack (130) is slidably mounted on the outer surface of the connecting pipe (124) via a rack sliding platform (131), wherein a planetary gearbox bracket (132) is also fixedly mounted on the outer surface of the connecting pipe (124), a planetary gearbox (134) is fixedly mounted on the planetary gearbox bracket (132), a first execution gear (133) meshing with the rack (130) is fixedly mounted on the output shaft of the planetary gearbox (134), a second execution gear (135) is fixedly mounted on the input shaft of the planetary gearbox (134), and an execution nut gear (136) meshing with the second execution gear (135) is also rotatably mounted on the planetary gearbox bracket (132).

7. The air-tight integral tilting disc check valve according to claim 6, characterized in that: The threaded transmission at the axial position of the actuator nut gear (136) is matched with a buffer screw (139), and the buffer screw (139) and the planetary gearbox bracket (132) are slidably matched through splines. Rubber buffer blocks (138) are provided at both ends of the buffer screw (139), one of the rubber buffer blocks (138) is directly fixed to the planetary gearbox bracket (132), and the other rubber buffer block (138) is fixed on the planetary gearbox bracket (132) in an overhead manner through a rubber buffer block bracket (137).

8. The air-tight integral tilting disc check valve according to claim 7, characterized in that: A toggle hand wheel (115) is rotatably mounted on the outer surface of the pressure retaining shell (109), and the toggle hand wheel (115) is fixedly rotated synchronously with the second execution gear (135) via a transmission shaft; a toggle toothed disc (114) is also fixed on the toggle hand wheel (115), and a toggle motor (116) is also fixed on the outer surface of the pressure retaining shell (109); a toggle main gear (117) meshing with the toggle toothed disc (114) is rotatably sleeved on the output shaft of the toggle motor (116), and the output shaft of the toggle motor (116) and the toggle main gear (117) are matched with each other through a switching assembly.

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