Dual-channel pressure triggered slurry valve sealing device and sealing method thereof

Abstract

The application relates to a double-channel pressure trigger type slurry valve sealing device and a sealing method thereof, and relates to the technical field of slurry valves. The sealing device comprises a valve body, a control member, an executing mechanism and a sealing structure. The sealing structure comprises a main sealing member and an auxiliary sealing member, both of which are pressed against the valve body to seal. An extrusion assembly is used for extruding the auxiliary sealing member. When slurry in the valve body leaks through the main sealing member, the extrusion assembly is driven to extrude the auxiliary sealing member. The main sealing member and the auxiliary sealing member are used to seal in cooperation. When the slurry in the valve body leaks through the main sealing member, the extrusion assembly is driven to extrude the auxiliary sealing member, so that the deformed auxiliary sealing member can better realize sealing and block the slurry from leaking outward. Meanwhile, when the pressure in the valve body is reduced, the pressure on the slurry is reduced, the auxiliary sealing member is elastically pushed to move back the extrusion assembly, and the slurry is also pushed to move back through the main sealing member into the valve body, so that the performance stability of the slurry valve is improved.

Description

Technical Field

[0001] This application relates to the technical field of slurry valves, and in particular to a sealing device and sealing method for a dual-channel pressure-triggered slurry valve. Background Technology

[0002] In industrial processes, the flow and control of various slurries such as mud, pulp, ceramics, and chemicals are of paramount importance to production efficiency and product quality. The Y-shaped slurry valve is one such example. The Y-shaped channel design reduces the viscous resistance of the medium and ensures stable flow.

[0003] These slurries typically have high viscosity and high solids content. Therefore, in many applications, slurry valves need to operate under high pressure differential conditions. This requires the slurry valves to withstand large pressure differentials while maintaining stable sealing performance to prevent leakage and ensure precise control of the fluid.

[0004] However, current slurry valves are often difficult to design to simultaneously meet the stability and sealing requirements under high pressure differential operating conditions. Multiple structures in the valve body are prone to deformation and damage under high pressure differential conditions, which can easily lead to slurry valve leakage and unstable performance. Summary of the Invention

[0005] To reduce leakage in slurry valves and improve their performance stability, this application provides a dual-channel pressure-triggered slurry valve sealing device and its sealing method.

[0006] Firstly, the dual-channel pressure-triggered slurry valve sealing device provided in this application adopts the following technical solution:

[0007] A dual-channel pressure-triggered slurry valve sealing device includes a valve body, a control component that controls the valve body to connect or close, and an actuator that drives the control component to move. The valve body is provided with a sealing structure, which includes:

[0008] The main seal and the secondary seal are detachably mounted on the valve body, with the main seal located inside the secondary seal and both pressing against the valve body for sealing.

[0009] The extrusion assembly is used to extrude the secondary seal. When the slurry in the valve body leaks through the main seal, the extrusion assembly is driven to extrude the secondary seal.

[0010] By adopting the above technical solution, the actuator starts the drive control component to move, realizing the opening or closing of the valve body; the main seal and the secondary seal cooperate to seal. The main seal blocks the pressure of the slurry and withstands high pressure conditions. If the slurry in the valve body passes through the main seal, the increase in slurry can drive the extrusion component to extrude the secondary seal. After the secondary seal deforms, it can better achieve a seal and prevent the slurry from leaking outward. At the same time, after the pressure in the valve body decreases, the pressure on the slurry decreases. The elasticity of the secondary seal pushes the extrusion component back, and can also push the slurry back through the main seal into the valve body, thereby reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0011] Optionally, the valve body includes a detachably connected and interconnected inlet pipe and outlet pipe. A snap-fit ​​groove is provided at the connection between the inlet pipe and the outlet pipe. The main seal and the secondary seal are snapped and pressed against the snap-fit ​​groove, so that the secondary seal is pressed against the main seal for positioning.

[0012] By adopting the above technical solution, the snap-fit ​​grooves on the feed pipe and discharge pipe are used to position the main seal and the secondary seal. At the same time, the main seal is close to the valve body and is subjected to high pressure. The slurry through the gap between the main seal and the snap-fit ​​groove moves to the extrusion assembly. The slurry pushes the extrusion assembly to squeeze the secondary seal. After being squeezed, the secondary seal has a better sealing effect with the snap-fit ​​groove, preventing the slurry from leaking outward. At the same time, after the pressure in the valve body decreases, the pressure on the slurry decreases, and the secondary seal rebounds and pushes the slurry back into the valve body, thereby reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0013] Optionally, the snap-fit ​​groove is provided with an annular positioning groove, and the extrusion assembly includes:

[0014] The positioning ring is set on the main seal and snapped onto the positioning groove for positioning.

[0015] Multiple positioning plates are set on the inner wall of the secondary seal and are positioned against the main seal under the elastic force of the secondary seal. The slurry leaking from the main seal pushes the positioning plates to move and increases the squeezing force of the secondary seal on the snap-fit ​​groove.

[0016] By adopting the above technical solution, the positioning ring is snapped into one of the positioning grooves, the main seal is snapped into one of the snap-fit ​​grooves, and the secondary seal is fixedly installed on the positioning plate. Then, the secondary seal and the positioning plate are snapped into one of the snap-fit ​​grooves. After the feed pipe and the discharge pipe are fixedly connected, the positioning ring is snapped into another positioning groove, the main seal is snapped into another snap-fit ​​groove, and the secondary seal and the positioning plate are snapped into another snap-fit ​​groove. Therefore, the stability of the main seal is improved, and the positioning grooves can further block the movement of the slurry. After the slurry passes through the main seal, it pushes the positioning plate to move. The positioning plate can push and squeeze the secondary seal to achieve a better sealing effect, thereby reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0017] Optionally, it also includes an alarm component for detecting valve body leakage, the alarm component comprising:

[0018] The pressure detection element is snapped onto the snap-fit ​​groove and pressed against the secondary seal to detect the pressure of the secondary seal.

[0019] The alarm is electrically connected to the pressure detection element and triggers an alarm when the pressure detection element detects a pressure exceeding a specified value.

[0020] By adopting the above technical solution, the slurry is squeezed by the extrusion component to compress the secondary seal, and the secondary seal compresses the pressure detection component. The pressure detection component detects the extrusion force, so the amount of slurry can be displayed by the pressure value. When the pressure is greater than the specified value, it means that the amount of slurry is sufficient, which means that the leakage of the valve body is relatively serious. Therefore, the alarm component can be used to remind the user, so that multiple structures of the valve body can be detected or replaced in time. This further reduces the leakage of the slurry valve and improves the performance stability of the slurry valve.

[0021] Optionally, the outer wall of the control component forms a tapered control surface, and the feed pipe has an execution surface that fits with the control surface. When the control surface is in close contact with the execution surface, the side of the control surface away from the feed pipe abuts against the inner wall of the main seal for positioning and sealing.

[0022] By adopting the above technical solution, the control surface and the execution surface are tightly attached together, which further improves the sealing effect. The side of the control surface away from the feed pipe abuts against the main seal for positioning and sealing. Therefore, when the control component is closed, the medium needs to pass through the gap between the control surface and the execution surface before moving to the main seal. This also prevents the slurry from exerting pressure on the main seal, thereby further reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0023] Optionally, the main seal is made of alloy metal, and the secondary seal is made of rubber and has an internal storage chamber for storing compressed air.

[0024] By adopting the above technical solution, the material of the main seal has better stability, that is, better sealing effect. The setting of storing air in the storage chamber makes the elasticity of the secondary seal better, that is, the secondary seal can be more easily compressed, and it can rebound faster after reducing the extrusion pressure on the secondary seal, thereby further reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0025] Optionally, the actuator includes:

[0026] A control lever is mounted on the control component and slidably installed on the discharge pipe;

[0027] Drive components are used to move the control lever;

[0028] A sealing and positioning assembly is installed on the discharge pipe and is used to seal the gap between the control rod and the discharge pipe and to position the control rod.

[0029] By adopting the above technical solution, the driving component drives the control rod and the control component to move, thereby realizing the control component to open or close the valve body; at the same time, the sealing and positioning component seals the gap between the control rod and the discharge pipe, improving the sealing effect, and can also position the control rod. Therefore, it reduces the risk of the driving component being damaged due to the continuous force exerted by the slurry through the control rod, improves the stability of the control component, further reduces the leakage of the slurry valve, and improves the performance stability of the slurry valve.

[0030] Optionally, the sealing positioning assembly includes:

[0031] The sealing cylinder is installed on the discharge pipe via a sealing tube and then fixedly connected to the discharge pipe. The control rod passes through the discharge pipe and the sealing cylinder in sequence.

[0032] A positioning piston is mounted on a control rod and slidably installed inside a sealing cylinder, dividing the sealing cylinder into a first chamber and a second chamber that are independent of each other. The first chamber is located on the side of the second chamber closer to the discharge pipe.

[0033] The first tube and the second tube are mounted on the sealing cylinder and communicate with the first chamber and control the input or output of the medium.

[0034] By adopting the above technical solution, the sealing cylinder is installed on the discharge pipe through the sealing tube, so that the slurry is bent when passing through the gap between the sealing cylinder and the discharge pipe, which reduces the risk of slurry passing through. Moreover, after the control component opens the valve body, the slurry will move to the connection between the sealing cylinder and the discharge pipe. At the same time, the slurry is in a flowing state, which makes the pressure lower, reduces the leakage of the slurry valve, and improves the performance stability of the slurry valve.

[0035] Simultaneously, the driving component drives the control rod and positioning piston to move. The first and second pipe bodies cooperate to input or output the medium into the first and second chambers. When the control component closes the valve body, the first and second pipe bodies close. Therefore, the positions of the positioning piston and control rod can be positioned, which greatly reduces the force on the driving component, improves the stability of the control component, reduces the leakage of the slurry valve, and improves the performance stability of the slurry valve.

[0036] Optionally, the feed pipe is provided with a liquid inlet assembly, the liquid inlet assembly comprising:

[0037] The drive tube is installed on the feed tube;

[0038] A fixed plate is installed inside the drive tube and divided into an independent liquid inlet chamber and a liquid storage chamber. The liquid inlet chamber is connected to the feed tube and the liquid storage chamber contains a medium and is connected to the second tube.

[0039] Piston 1 and Piston 2 are slidably mounted on the inlet chamber and the storage chamber, respectively, and are slidably mounted on the fixed plate via a moving rod. When the control component closes the valve body, the slurry pressure in the feed pipe increases, driving piston 1 and piston 2 to move. The movement of piston 2 drives the medium in the storage chamber to enter the second chamber through the second pipe body, thereby positioning the positioning piston and the control rod.

[0040] By adopting the above technical solution, after the control component closes the valve body, it pushes the slurry back into the feed pipe, and the slurry in the feed pipe continues to be input, thereby increasing the slurry pressure in the feed pipe. This drives piston one and piston two to move. The movement of piston two drives the medium in the liquid storage chamber to enter the second chamber through the second pipe body, thereby positioning the positioning piston rod and control rod. The drive rod and control component are close to the feed pipe, which improves the stability of the control component when connected to the valve body. At the same time, the forces acting on the control component are opposite in direction, so that the forces acting on both sides of the control component cancel each other out, reducing the outward thrust of the slurry in the feed pipe on the control component, improving the sealing effect of the control component on the valve body, reducing the leakage of the slurry valve, and improving the performance stability of the slurry valve.

[0041] Meanwhile, the slurry has a certain degree of viscosity. Therefore, the slurry is controlled by the piston to allow the liquid in the storage chamber to enter or exit the second chamber, so that the slurry will not enter the second chamber. This reduces the risk of the viscous slurry entering the second chamber and causing blockage, and further improves the stability of the slurry valve performance.

[0042] Optionally, the control rod is fitted with an elastic sealing sleeve. When the control component opens the valve body, the sealing sleeve presses against the control component and the discharge pipe and is used to seal the gap between the control rod and the discharge pipe.

[0043] By adopting the above technical solution, when the control component opens the valve body away from the feed pipe, the control component drives the sealing ring to approach the discharge pipe. After the control component opens the valve body, the sealing ring presses against the control component and the discharge pipe, thereby sealing the gap between the control rod and the discharge pipe. This greatly reduces the risk of slurry moving to the connection between the control rod and the discharge pipe, significantly reduces the leakage of the slurry valve, and improves the performance stability of the slurry valve.

[0044] Secondly, the dual-channel pressure-triggered slurry valve sealing method provided in this application adopts the following technical solution:

[0045] A sealing method for a dual-channel pressure-triggered slurry valve includes the following steps:

[0046] The main seal and the secondary seal are sequentially snapped into the snap-fit ​​groove located on the feed pipe, so that the secondary seal is pressed against the main seal for positioning;

[0047] The feed pipe and the discharge pipe are fixedly connected, so that the main seal and the secondary seal are snapped into the two snap-fit ​​grooves for positioning; the main seal and the secondary seal cooperate to seal, the main seal blocks the pressure of the slurry, and if the slurry in the valve body passes through the main seal, the slurry can drive the extrusion assembly to squeeze the secondary seal to prevent the slurry from leaking outward.

[0048] In summary, this application includes at least one of the following beneficial technical effects:

[0049] 1. Sealing is achieved through the cooperation of the main seal and the secondary seal. If the slurry in the valve body passes through the main seal, it drives the extrusion assembly to squeeze the secondary seal. This deformation of the secondary seal enables better sealing and prevents the slurry from leaking outward. At the same time, as the pressure in the valve body decreases, the pressure on the slurry also decreases. The elasticity of the secondary seal pushes the extrusion assembly back, which in turn pushes the slurry back through the main seal into the valve body. This reduces the leakage of the slurry valve and improves the performance stability of the slurry valve.

[0050] 2. The main seal, secondary seal, and positioning plate are snapped into the positioning groove by a positioning ring. This improves the stability of the main seal, and the positioning groove further prevents the slurry from moving. After the slurry passes through the main seal, it pushes the positioning plate to move. The positioning plate can push and squeeze the secondary seal to achieve a better sealing effect, thereby reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0051] 3. The pressure is detected by the pressure detection device, so the amount of slurry can be displayed by the pressure value. When the pressure is greater than the specified value, it means that the amount of slurry is too much, which means that the leakage of the valve body is relatively serious. Therefore, the alarm device can be used to remind the user, so that multiple structures of the valve body can be detected or replaced in time. This further reduces the leakage of the slurry valve and improves the performance stability of the slurry valve.

[0052] 4. The sealing and positioning assembly seals the gap between the control rod and the discharge pipe, improving the sealing effect and positioning the control rod. This reduces the risk of damage to the drive component caused by the continuous force exerted by the slurry through the control rod, improves the stability of the control component, further reduces leakage of the slurry valve, and enhances the performance stability of the slurry valve. Attached Figure Description

[0053] Figure 1 This is a cross-sectional schematic diagram of the sealing device;

[0054] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;

[0055] Figure 3 yes Figure 1 Enlarged diagram of section B;

[0056] Figure 4 yes Figure 1 Enlarged schematic diagram of section C.

[0057] Reference numerals: 1. Valve body; 11. Feed pipe; 12. Discharge pipe; 13. Snap-fit ​​groove; 14. Positioning groove; 15. Control component; 16. Control surface; 17. Actuating surface; 18. Mounting groove; 19. Sealing sleeve; 2. Sealing structure; 21. Main seal; 22. Secondary seal; 221. Storage chamber; 3. Extrusion assembly; 31. Positioning ring; 32. Positioning plate; 4. Alarm assembly; 41. Pressure detection component; 42. Receiving groove; 5. Actuator 51. Control lever; 52. Drive unit; 6. Sealing and positioning assembly; 61. Sealing cylinder; 62. Positioning piston; 63. First tube body; 64. Second tube body; 65. Sealing tube; 66. First chamber; 67. Second chamber; 68. Installation valve; 69. Connecting valve; 7. Liquid inlet assembly; 71. Drive tube; 72. Fixing plate; 73. Piston one; 74. Piston two; 75. Moving rod; 76. Infusion tube; 77. Liquid inlet chamber; 78. Liquid storage chamber. Detailed Implementation

[0058] The following provides a further detailed description of this application.

[0059] This application discloses a dual-channel pressure-triggered slurry valve sealing device.

[0060] Reference Figure 1 A dual-channel pressure-triggered slurry valve sealing device includes a valve body 1, a control element 15 that controls the valve body 1 to connect or close, an actuator 5 that drives the control element 15 to move, a sealing structure 2 for sealing, and an alarm component 4 for monitoring and alarming the leakage of the valve body 1.

[0061] Reference Figure 1 and Figure 2 The valve body 1 includes a feed pipe 11 and a discharge pipe 12 that are detachably connected and interconnected by a screw and a nut. The feed pipe 11 and the discharge pipe 12 are used to input and output slurry, respectively. An annular snap-fit ​​groove 13 is coaxially provided at one end of the feed pipe 11 and the discharge pipe 12 that are connected to each other. The sealing structure 2 includes a main seal 21 and a secondary seal 22. The main seal 21 and the secondary seal 22 are detachably mounted on the snap-fit ​​groove 13. The main seal 21 is located inside the secondary seal 22 and presses against the snap-fit ​​groove 13 to seal.

[0062] The extrusion assembly 3 is used to extrude the secondary seal 22. When the slurry in the valve body 1 leaks through the main seal 21, it drives the extrusion assembly 3 to extrude the secondary seal 22. After the secondary seal 22 is extruded by the slurry, the extrusion force of the secondary seal 22 on the snap-fit ​​groove 13 is increased, thereby improving the sealing effect of the secondary seal 22. At the same time, when the slurry pressure in the valve body 1 decreases, the extrusion force on the secondary seal 22 is reduced, and the secondary seal 22 rebounds and pushes the slurry back through the main seal 21 into the valve body 1.

[0063] Both snap-fit ​​grooves 13 are coaxially provided with annular positioning grooves 14. The extrusion assembly 3 includes a positioning ring 31 and a positioning plate 32. The positioning ring 31 is coaxially and integrally disposed on the upper and lower surfaces of the main seal 21, and the positioning ring 31 is snap-fitted onto the two positioning grooves 14 for positioning, thereby positioning the main seal 21 in the radial direction of the snap-fit ​​groove 13.

[0064] The positioning plate 32 is annular and its axis coincides with the axis of the secondary seal 22. Multiple positioning plates 32 are arranged in a circumferential array around the axis of the secondary seal 22. The inner sidewall of the secondary seal 22 is fixedly installed on multiple positioning plates 32. The secondary seal 22 is made of rubber and has a storage chamber 221 for storing compressed air inside. Under the action of elasticity, the secondary seal 22 pushes multiple positioning plates 32 to press against the main seal 21 for positioning, so that the secondary seal 22 presses against the two snap-fit ​​grooves 13 for sealing. The upper and lower ends of the positioning plate 32 abut against the snap-fit ​​grooves 13 and can move in the snap-fit ​​grooves 13.

[0065] When the slurry in the valve body 1 moves to the positioning plate 32 through the gap between the main seal 21 and the snap-fit ​​groove 13, the slurry can push multiple positioning plates 32 to move. The multiple positioning plates 32 simultaneously squeeze the secondary seal 22. After the secondary seal 22 is squeezed and deformed, the squeezing force on the snap-fit ​​groove 13 is increased, which improves the sealing effect on the snap-fit ​​groove 13 and prevents the slurry from continuing to move and causing leakage. When the slurry pressure in the valve body 1 decreases, the thrust on the positioning plate 32 decreases, the secondary seal 22 rebounds and pushes the multiple positioning plates 32 back, thereby pushing the slurry located at the positioning plate 32 back into the valve body 1.

[0066] The alarm component 4 includes a pressure detection element 41 and an alarm element. A receiving groove 42 is provided on the snap-fit ​​groove 13 and located outside the secondary seal 22. The pressure detection element 41 is snap-fitted onto the receiving groove 42, and the secondary seal 22 is pressed against the pressure detection element 41 to detect the pressure of the secondary seal 22. The alarm element is connected to the pressure detection element 41 via an electric wire. Both the feed pipe 11 and the discharge pipe 12 have through holes for the power supply wire to pass through. The alarm element receives the pressure data detected by the pressure detection element 41. The more slurry leaks into the positioning plate 32, the greater the pressure of the positioning plate 32 on the secondary seal 22, and the greater the pressure value of the pressure detection element 41. When the pressure exceeds a specified value, the alarm element will sound an alarm. At this time, the amount of leaked slurry has been large, and the valve body 1 needs to be dealt with.

[0067] The outer wall of the control component 15 is coaxially formed with a tapered control surface 16. The inner wall of the feed pipe 11 near the discharge pipe 12 has an execution surface 17 that fits with the control surface 16. When the control surface 16 is in close contact with the execution surface 17, the valve body 1 is closed, and the side of the control surface 16 away from the feed pipe 11 abuts against the inner wall of the main seal 21 for positioning and sealing.

[0068] Reference Figure 1 , Figure 3 The actuator 5 includes a control rod 51, a drive component 52, and a sealing and positioning assembly 6. An installation groove 18 is provided on the outer wall of the discharge pipe 12. The control rod 51 coaxially passes through the bottom end of the installation groove 18 and extends to the inner wall of the discharge pipe 12. At the same time, the control rod 51 is coaxially and fixedly connected to the control component 15. The sliding direction of the control component 15 coincides with the axis of the control component 15. The movement of the control rod 51 drives the movement of the control component 15. The drive component 52 is used to drive the movement of the control rod 51. The drive component 52 can be an electric actuator, a lead screw, or other structures. The drive component 52 adopts the structure in the prior art, which will not be described in detail here.

[0069] The sealing and positioning assembly 6 is disposed on the discharge pipe 12 and is used to seal the gap between the control rod 51 and the discharge pipe 12 and to position the control rod 51. The sealing and positioning assembly 6 includes a sealing cylinder 61, a positioning piston 62, a first tube body 63 and a second tube body 64. A sealing tube 65 communicating with the inside of the sealing cylinder 61 is coaxially disposed at the bottom of the sealing cylinder 61. The sealing tube 65 is inserted into the mounting groove 18, and then the bottom end of the sealing cylinder 61 is fixedly installed on the outer wall of the discharge pipe 12. The control rod 51 coaxially passes through the sealing tube 65 and the sealing cylinder 61. The positioning piston 62 is fixedly installed on the control rod 51 and slidably installed on the inner wall of the sealing cylinder 61. The positioning piston 62 divides the sealing cylinder 61 into two independent chambers, a first chamber 66 and a second chamber 67. The first chamber 66 is located on the side of the second chamber 67 closer to the discharge pipe 12. The driving component 52 is disposed on the sealing cylinder 61 and connected to the control rod 51.

[0070] The first pipe body 63 and the second pipe body 64 are fixedly installed on the sealing cylinder 61 and are connected to the first chamber 66 and the second chamber 67 to control the input or output of the medium, with liquid being the preferred medium; an installation valve 68 for controlling opening and closing is fixedly installed on the first pipe body 63, and a connecting valve 69 for controlling opening and closing is fixedly installed on the second pipe body 64.

[0071] Reference Figures 1-3 When the drive element 52 drives the control rod 51, the positioning piston 62 and the control element 15 to move simultaneously, the mounting valve 68 and the connecting valve 69 open, allowing the medium to be input or output into the first chamber 66 and the second chamber 67 as needed. When the control surface 16 and the execution surface 17 on the control element 15 are in close contact and the valve body 1 is closed, the connecting valve 69 and the mounting valve 68 close. Then, the medium located in the first chamber 66 and the second chamber 67 can position the positioning piston 62, the control rod 51 and the control element 15, improving the stability of the valve body 1 during control.

[0072] The control component 15 is fitted with an elastic sealing sleeve 19. After the control component 15 approaches the discharge pipe 12 and the sealing positioning component 6, the control component 15 pushes the sealing sleeve 19 to press against the connection between the discharge pipe 12 and the control rod 51 to seal, thereby improving the sealing effect.

[0073] Reference Figure 1 , Figure 4 The feed pipe 11 is provided with a liquid inlet assembly 7, which includes a drive pipe 71, a fixing plate 72, a piston 1 73 and a piston 2 74. The drive pipe 71 is fixedly installed on the feed pipe 11 and its axis is perpendicular to the axis of the feed pipe 11. The fixing plate 72 is fixedly installed on the inner side wall of the drive pipe 71 and the fixing plate 72 divides the drive pipe 71 into an independent liquid inlet chamber 77 and a liquid storage chamber 78. The liquid inlet chamber 77 is connected to the feed pipe 11, and the liquid storage chamber 78 contains liquid and is fixedly installed with a delivery pipe 76 that is connected to the second pipe body 64.

[0074] Piston 1 73 and piston 2 74 are slidably installed in the liquid inlet chamber 77 and the liquid storage chamber 78, respectively, and are slidably installed on the fixed plate 72 via the moving rod 75. When the control component 15 closes the valve body 1, the slurry pressure in the feed pipe 11 increases, which drives piston 1 73 and piston 2 74 to move. The movement of piston 2 74 drives the medium in the liquid storage chamber 78 to enter the second chamber 67 through the second pipe body 64, thereby positioning the positioning piston 62, the control rod 51 and the control component 15, so that the control component 15 changes from being subjected to force on one side to being subjected to force on both sides, so that the force on the control component 15 is partially canceled, reducing the force on the control component 15.

[0075] When the control element 15 opens the valve body 1, the slurry in the feed pipe 11 enters the discharge pipe 12, reducing the pressure. This allows the medium located in the second chamber 67 to move back into the storage chamber 78, driving piston 2 74 and piston 1 73 to move back, thereby facilitating the subsequent positioning of the control element 15.

[0076] The working principle of this application embodiment is as follows:

[0077] When the mounting valve 68 and connecting valve 69 are opened, the driving component 52 drives the control rod 51, the positioning piston 62, and the control component 15 to move, causing the control component 15 to approach the feed pipe 11. This causes the control surface 16 and the execution surface 17 to press tightly against each other, closing the valve body 1. During the movement, the slurry pressure in the feed pipe 11 increases, which in turn pushes the piston 74 and piston 73 to move, allowing the liquid in the storage chamber 78 to enter the second chamber 67. After the control component 15 has moved, it closes, and the mounting valve 68 and connecting valve 69 are closed. This positions the control component 15, improving its stability when closed. Furthermore, when closing the valve body 1, the slurry pushes the piston 73 to move, reducing the impact force of the slurry on the control component 15, greatly reducing leakage of the slurry valve, and improving the performance stability of the slurry valve.

[0078] When valve body 1 needs to be opened, mounting valve 68 and connecting valve 69 are opened, and drive component 52 starts drive control component 15 to move and open valve body 1. The slurry in feed pipe 11 enters discharge pipe 12, which reduces the slurry pressure in feed pipe 11. Therefore, the liquid in second chamber 67 flows back to storage chamber 78 through second pipe body 64. The backflow of liquid also pushes piston one 73 and piston two 74 back, thereby realizing the opening of valve body 1.

[0079] The main seal 21 seals the snap-fit ​​groove 13 and withstands high-pressure conditions. If the slurry moves through the main seal 21 to the multiple positioning plates 32, the slurry pushes the multiple positioning plates 32 to squeeze the secondary seal 22, making the secondary seal 22 fit better against the snap-fit ​​groove 13 to achieve a seal. When the secondary seal 22 is under pressure, it squeezes the pressure detection element 41. The pressure detection element 41 detects the pressure and transmits it to the alarm element. When the pressure is greater than a specified value, the alarm element is activated to remind the staff to maintain the valve body 1. At the same time, if the pressure in the valve body 1 decreases, the secondary seal 22 pushes the multiple positioning plates 32 back, so that the slurry located at the positioning plates 32 moves back to the valve body 1 through the main seal 21, thereby reducing the leakage of the slurry valve and improving the performance stability of the slurry valve.

[0080] This application discloses a sealing method for a dual-channel pressure-triggered slurry valve.

[0081] Reference Figures 1-4 A dual-channel pressure-triggered slurry valve sealing method includes the following steps:

[0082] The main seal 21 and the secondary seal 22 are sequentially snapped onto the snap-fit ​​groove 13 located on the feed pipe 11, so that the secondary seal 22 is pressed against the main seal 21 for positioning.

[0083] The feed pipe 11 and the discharge pipe 12 are fixedly connected, so that the main seal 21 and the secondary seal 22 are snapped into the two snap-fit ​​grooves 13 for positioning; the main seal 21 and the secondary seal 22 cooperate to seal, the main seal 21 blocks the pressure of the slurry, and if the slurry in the valve body 1 passes through the main seal 21, the slurry can drive the extrusion assembly 3 to extrude the secondary seal 22 to prevent the slurry from leaking outward.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-channel pressure-triggered slurry valve sealing device, characterized in that: The device includes a valve body (1), a control element (15) for controlling the valve body (1) to open or close, and an actuator (5) for driving the control element (15) to move. The valve body (1) is provided with a sealing structure (2). The sealing structure (2) includes a main seal (21) and a secondary seal (22), which are detachably mounted on the valve body (1) such that the main seal (21) is located inside the secondary seal (22) and both are pressed against the valve body (1) for sealing. A squeezing assembly (3) is used to squeeze the secondary seal (22). When the slurry in the valve body (1) leaks through the main seal (21), the squeezing assembly (3) is driven to squeeze the secondary seal (22). The valve body (1) includes a detachable and interconnected feed pipe (11) and a discharge pipe (12). The feed pipe (11) and the discharge pipe (12) are both provided with snap-fit ​​grooves (13). The main seal (21) and the secondary seal (22) are snap-fitted and pressed against the snap-fit ​​grooves (13), and the secondary seal (22) is pressed against the main seal (21) for positioning. The snap-fit ​​groove (13) is provided with an annular positioning groove (14). The extrusion assembly (3) includes: a positioning ring (31), which is set on the main seal (21) and snap-fitted onto the positioning groove (14) for positioning; and multiple positioning plates (32), which are set on the inner side wall of the secondary seal (22) and pressed against the main seal (21) under the elastic force of the secondary seal (22) for positioning. The slurry leaked from the main seal (21) pushes the positioning plates (32) to move and is used to increase the extrusion force of the secondary seal (22) on the snap-fit ​​groove (13).

2. The dual-channel pressure-triggered slurry valve sealing device according to claim 1, characterized in that: It also includes an alarm component (4) for alarming the leakage of valve body (1), the alarm component (4) including: a pressure detection element (41), which is snapped on the snap groove (13) and presses against the sub-seal (22) and is used to detect the pressure of the sub-seal (22); and an alarm element, which is electrically connected to the pressure detection element (41) and alarms when the pressure detected by the pressure detection element (41) is greater than a specified value.

3. The dual-channel pressure-triggered slurry valve sealing device according to claim 2, characterized in that: The outer wall of the control component (15) forms a conical control surface (16), and the feed pipe (11) has an execution surface (17) that fits with the control surface (16). When the control surface (16) is in close contact with the execution surface (17), the side of the control surface (16) away from the feed pipe (11) abuts against the inner wall of the main seal (21) for positioning and sealing.

4. The dual-channel pressure-triggered slurry valve sealing device according to claim 1, characterized in that: The main seal (21) is made of alloy metal, and the secondary seal (22) is made of rubber and has an internal storage chamber (221) for storing compressed air.

5. The dual-channel pressure-triggered slurry valve sealing device according to claim 1, characterized in that: The actuator (5) includes: a control rod (51), which is disposed on the control component (15) and slidably mounted on the discharge pipe (12); a drive component (52) for driving the control rod (51) to move; and a sealing and positioning assembly (6), which is disposed on the discharge pipe (12) and is used to seal the gap between the control rod (51) and the discharge pipe (12) and to position the control rod (51).

6. The dual-channel pressure-triggered slurry valve sealing device according to claim 5, characterized in that: The sealing and positioning assembly (6) includes: a sealing cylinder (61), which is installed on the discharge pipe (12) through a sealing tube (65) and then fixedly connected to the discharge pipe (12); the control rod (51) passes through the discharge pipe (12) and the sealing cylinder (61) in sequence; a positioning piston (62), which is set on the control rod (51) and slidably installed in the sealing cylinder (61) and divides the sealing cylinder (61) into a first chamber (66) and a second chamber (67) that are independent of each other; the first chamber (66) is located on the side of the second chamber (67) near the discharge pipe (12); a first tube body (63) and a second tube body (64), which are set on the sealing cylinder (61) and communicate with the first chamber (66) and control the input or output of the medium.

7. The dual-channel pressure-triggered slurry valve sealing device according to claim 6, characterized in that: The feed pipe (11) is provided with a liquid inlet assembly (7), which includes: a drive pipe (71) disposed on the feed pipe (11); a fixing plate (72) disposed inside the drive pipe (71) and divided into an independent liquid inlet chamber (77) and a liquid storage chamber (78), wherein the liquid inlet chamber (77) is connected to the feed pipe (11) and the liquid storage chamber (78) contains a medium and is connected to the second pipe body (64); piston one (73) and piston two (74) respectively sliding and mounted Installed on the inlet chamber (77) and the storage chamber (78) and slidably mounted on the fixed plate (72) via the moving rod (75); when the control component (15) closes the valve body (1), the slurry pressure in the feed pipe (11) increases, driving piston one (73) and piston two (74) to move. The movement of piston two (74) drives the medium in the storage chamber (78) to enter the second chamber (67) through the second pipe body (64) and then positions the positioning piston (62) and the control rod (51).

8. A sealing method applied to the sealing device according to any one of claims 1-7, characterized in that: Includes the following steps: The main seal (21) and the secondary seal (22) are sequentially snapped onto the snap-fit ​​groove (13) located on the feed pipe (11), so that the secondary seal (22) is pressed against the main seal (21) for positioning; the feed pipe (11) and the discharge pipe (12) are fixedly connected, so that the main seal (21) and the secondary seal (22) are snapped onto the two snap-fit ​​grooves (13) for positioning; the main seal (21) and the secondary seal (22) cooperate to seal, the main seal (21) blocks the pressure of the slurry, if the slurry in the valve body (1) passes through the main seal (21), the slurry can drive the extrusion assembly (3) to extrude the secondary seal (22) to prevent the slurry from leaking outward.

Images