An environmentally friendly self-cleaning sealing surface stop valve

Abstract

This invention belongs to the field of valve manufacturing technology, and particularly relates to an environmentally friendly self-cleaning sealing surface gate valve, including a valve body with a flow channel arranged in a low-inlet, high-outlet configuration; a valve seat, disposed in the flow channel inside the valve body, having an overall hollow structure, with a drainage groove on its outer edge; and discharge grooves connected to the drainage grooves on one side of both the valve seat and the valve body. This invention utilizes an impurity treatment component. When the valve is closed, the bottom surface of the valve disc and the top surface of the outward-inclined plate form a guiding slope, allowing settled impurity particles to slide down the slope into the drainage groove and be discharged from the valve body through the discharge groove. Simultaneously, when the valve is closed, the impurity treatment component uses stored cleaning fluid to thoroughly rinse the contact surfaces of the outward-inclined plate and the valve disc through a nozzle assembly, completely removing residual impurity particles. This prevents impurity particles from affecting the tight seal between the valve disc and the valve seat sealing surface, effectively preventing liquid medium leakage and ensuring the sealing performance of the gate valve.

Description

Technical Field

[0001] This invention belongs to the field of valve manufacturing technology, and in particular relates to an environmentally friendly self-cleaning sealing surface gate valve. Background Technology

[0002] A gate valve is a commonly used type of valve. It relies on the pressure of the valve stem to ensure a tight seal between the valve disc sealing surface and the valve seat sealing surface, thus preventing the flow of media. A gate valve typically consists of main components such as a valve body, valve cover, valve stem, valve disc, and seals. Its main function is to cut off the flow of media in a pipeline. In industrial production, when it is necessary to repair or maintain a certain piece of equipment, the corresponding gate valve can be closed to isolate the equipment from other operating pipeline systems, ensuring the safe conduct of maintenance work.

[0003] The core function of a gate valve is to cut off the flow of media in a pipeline. Only through a good seal, ensuring that the valve disc sealing surface and the valve seat sealing surface are tightly fitted, can the medium be effectively prevented from passing through. Otherwise, the medium will seep out or spray out from the sealing surface between the valve disc and the valve seat, resulting in fluid loss. Leakage will affect the accuracy of production. Existing systems usually install a gasket between the valve disc and the valve seat, and apply pressure through the valve stem to make the valve disc press tightly against the valve seat to achieve a sealing effect.

[0004] When liquid flows through a gate valve, the liquid itself contains impurities (such as solid particles, sand, rust, etc.). Gate valves are usually installed with a low inlet and high outlet, with the liquid flowing in from below the valve seat and out from above the valve disc. When the valve is closed, the liquid flow velocity suddenly decreases near the valve seat. Under this reduced flow velocity, impurities are more likely to settle towards the valve seat under gravity, becoming trapped in the groove at the top of the valve seat and adhering to the bottom surface of the valve disc. These impurities prevent the valve disc and valve seat sealing surfaces from fitting tightly, damaging the sealing performance and causing liquid leakage. Furthermore, even tiny particles can create scratches or pits on the sealing surfaces of the valve disc and valve seat. Over time, this wear on the valve seat surface causes changes in the size and shape of the valve seat, affecting its dimensional accuracy and ultimately the valve's performance. Summary of the Invention

[0005] To solve the above problems, the present invention adopts the following technical solution: an environmentally friendly self-cleaning sealing surface shut-off valve, comprising:

[0006] The valve body has a flow channel arranged in a low-inlet, high-outlet configuration;

[0007] The valve seat is located in the internal flow channel of the valve body and has a hollow structure. A drainage groove is provided on its outer edge. A discharge groove is provided on one side of the valve seat and the valve body. The discharge groove is connected to the drainage groove.

[0008] The valve stem is located on the upper part of the valve body;

[0009] The valve disc is located at the bottom of the valve stem and above the valve seat. Its bottom slopes outwards, and its lowest point is located in the middle of the drain groove.

[0010] An outward-inclined plate is located on the top of the valve seat, with its top inclined outwards and its surface provided with a sealing gasket;

[0011] An impurity treatment component, located within the valve seat, is used to clean impurity particles from the contact surface between the outward-curving plate and the valve disc.

[0012] Furthermore, a liquid-blocking cylinder is installed at the bottom of the valve disc, which is tightly fitted inside the valve seat; the impurity treatment assembly:

[0013] The number of cone-shaped filter plates is at least four, and they are cone-shaped as a whole and symmetrically installed in the valve body;

[0014] The liquid storage tank has a cylindrical structure and is located inside the valve body, corresponding to the conical filter plates. A safety valve is installed at the bottom of the liquid storage tank.

[0015] The first return spring is installed on the bottom wall of the reservoir;

[0016] The liquid inlet plate is slidably connected inside the liquid storage tank and fixedly connected to one end of the first return spring. The liquid inlet plate is hollow in shape.

[0017] The drive rod has one end slidably connected inside the conical filter plate;

[0018] A liquid-proof plate is installed at the bottom of the drive rod;

[0019] The separator is installed inside the valve body, and its inlet end is connected to the safety valve through a pipe. The separator has two outlet ends.

[0020] The hollow disc is located inside the valve body and is connected to the first outlet of the separator pipe via a pipeline.

[0021] The nozzle assembly is mounted on the hollow disc;

[0022] The drive assembly, located inside the valve body, is used to move the drive rod along the inside of the reservoir.

[0023] Furthermore, the nozzle assembly includes:

[0024] The nozzle cover is installed in a ring on the inner wall of the hollow plate. It is arranged in a long strip shape, and the upper and lower ends of the strip shape are set as inclined parts. Water spray holes are opened inside the inclined parts. The water spray holes below the inclined parts are arranged along the direction of the outward inclined plate, and the water spray holes above the inclined parts are arranged along the inclined direction of the outer side of the valve disc.

[0025] Furthermore, the water spray hole of the inclined portion is inclined at an angle of sixty degrees along the direction of the outward inclined plate and the valve disc.

[0026] Furthermore, a spray generator is installed between the spaced nozzle covers of the hollow disc.

[0027] Furthermore, a spray groove connected to the drainage groove is provided at the bottom left end of the valve seat, the second water outlet of the liquid separator is connected to the spray groove, and the bottom wall of the drainage groove is arranged in an inclined manner from left to right.

[0028] Furthermore, a pressure sensor is installed at the bottom of the storage tank, a miniature solenoid valve is installed on the water outlet side of the storage tank, an oil storage chamber connected to the miniature solenoid valve is installed inside the valve body, and an oil filling hole is installed at one end of the oil storage chamber on the outside of the valve body.

[0029] Furthermore, the impurity treatment component also includes:

[0030] There are at least two air cylinders, which are symmetrically installed in the valve body;

[0031] A reset spring plate, which is installed inside the air cylinder;

[0032] The air injection rod is slidably connected inside the air cylinder and fixedly connected to the return spring plate. The top of the air injection rod is below the drive assembly.

[0033] The curved cylinder is provided in at least two, one of which is installed on the inner side of the front end of the valve body and the other is installed on the inner side of the rear end of the valve body;

[0034] The air tube has one end at the outlet of the air cylinder and the other end installed at the inlet of the curved cylinder.

[0035] An expansion curved rod is slidably connected inside a curved cylinder, with one end of the expansion curved rod extending out of the outside of the curved cylinder;

[0036] The drive plate is provided in at least two parts, one of which is installed on the left side of the hollow disc, which is rotatably connected to the valve body, and the other is installed on the right side of the outward tilting plate. The other part is fixedly connected to the extended part of the expansion curved rod at one end of the left drive plate, and the other part of the right drive plate passes through the valve seat and is fixedly connected to one end of the expansion curved rod.

[0037] Furthermore, the driving component includes:

[0038] At least two arc-shaped passive plates are provided and are symmetrically installed on top of the drive rod and the air injection rod located at the front and rear ends;

[0039] The active block is mounted on top of the valve disc and corresponds one-to-one with the arc-shaped passive plate.

[0040] Compared to existing technologies, the environmentally friendly self-cleaning sealing surface shut-off valve described in this invention has the following advantages:

[0041] 1. This invention utilizes an impurity treatment component. When the valve is closed, the bottom surface of the valve disc and the top surface of the outward-inclined plate form a guiding slope. Settled impurity particles can slide down the slope into the drainage trough and be discharged from the valve body through the discharge trough. Simultaneously, when the valve is closed, the impurity treatment component uses stored cleaning fluid to thoroughly rinse the contact surfaces of the outward-inclined plate and the valve disc through the nozzle assembly, completely removing residual impurity particles. This prevents impurity particles from affecting the tight fit between the valve disc and the valve seat sealing surface, effectively preventing liquid medium leakage and ensuring the sealing performance of the gate valve.

[0042] 2. This invention features a dual protection mechanism to reduce wear on the sealing surface. On one hand, the conical filter plate initially intercepts impurities during the liquid inflow stage, reducing the amount of impurities entering the storage tank. On the other hand, the nozzle assembly uses the stored cleaning liquid to perform a secondary flushing of the contact surfaces of the outward-curving plate and valve disc when the valve is closed. In addition, the mist generated by the spray generator can soften and loosen stubborn impurities, and together with the water flow, remove impurities more thoroughly. It can also form a lubricating film, reducing wear on the sealing surface caused by the cleaning process, lowering the risk of scratches and pits on the sealing surface, and effectively extending the service life of the shut-off valve.

[0043] 3. This invention utilizes pressure changes during valve opening and closing to drive the impurity treatment component, eliminating the need for additional power equipment, thus reducing energy consumption and aligning with energy conservation and environmental protection principles. Furthermore, by filtering and storing the liquid during valve opening and triggering spray cleaning via the drive component during valve closing, a fully automated impurity cleaning process is achieved. Impurities on the contact surfaces of the outward-curving plate and valve disc are actively removed during valve opening and closing without manual intervention. Compared to traditional manual cleaning or passive interception methods, cleaning efficiency is significantly improved, reducing manual maintenance costs and enhancing the stability and reliability of equipment operation. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 This is an exploded view of the overall structure of the present invention;

[0046] Figure 3 This is a cross-sectional view of the valve body of the present invention;

[0047] Figure 4 This is a schematic diagram of the connection between the valve disc and the outward tilting plate of the present invention;

[0048] Figure 5 This is a schematic diagram of the valve seat of the present invention;

[0049] Figure 6This is a longitudinal section view of the valve seat of the present invention;

[0050] Figure 7 This is a schematic diagram of the liquid storage tank of the present invention;

[0051] Figure 8 yes Figure 6 A magnified view of part A in the image;

[0052] Figure 9 This is a schematic diagram of the spray angle of the water jet hole in this invention;

[0053] Figure 10 This is a schematic diagram of the valve seat drainage groove of the present invention;

[0054] Figure 11 This is a schematic diagram of the oil storage cavity of the present invention;

[0055] Figure 12 yes Figure 3 Schematic diagram of the three-dimensional structure;

[0056] Figure 13 This is a longitudinal cross-sectional view of the air cylinder of the present invention;

[0057] Figure 14 This is a cross-sectional view of the curved cylinder of the present invention;

[0058] Figure 15 This is a schematic diagram of the curved cylinder on the right side of the present invention.

[0059] The marks in the figure are:

[0060] 1. Valve body; 12. Valve seat; 121. Discharge groove; 122. Spray groove; 13. Valve stem; 14. Valve disc; 141. Liquid blocking cylinder; 15. Outward tilting plate; 2. Impurity treatment assembly; 21. Conical filter plate; 22. Liquid storage tank; 23. First return spring; 24. Liquid inlet plate; 25. Drive rod; 26. Liquid prevention plate; 27. Liquid distribution pipe; 28. Hollow disc; 29. ​​Nozzle assembly; 291. Nozzle cover; 292. Water spray hole; 293. Spray generator; 211. Miniature solenoid valve; 212. Oil storage chamber; 221. Air cylinder; 222. Return spring plate; 223. Air injection rod; 224. Curved cylinder; 225. Air pipe; 226. Expansion curved rod; 227. Drive plate; 231. Arc-shaped passive plate; 232. Active block. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0062] See Figure 1-Figure 5 As shown, this invention provides an environmentally friendly self-cleaning sealing surface stop valve, comprising: a valve body 1, the flow channel of which is arranged in a low-inlet, high-outlet configuration; a valve seat 12, disposed in the internal flow channel of the valve body 1, having a hollow structure, with a drainage groove on its outer edge, and a discharge groove 121 on one side of the valve seat 1 and the valve body 1, the discharge groove 121 being connected to the drainage groove; when liquid flows through the environmentally friendly self-cleaning sealing surface stop valve, the liquid follows the "low-inlet, high-outlet" path, flowing in from below the valve seat 12 and out from above the valve disc 14; a valve stem 13, disposed on the upper part of the valve body 1; a valve disc 14, disposed at the bottom of the valve stem 13 and above the valve seat 12, its bottom inclined outwards; and an outwardly inclined plate 15, disposed on the top of the valve seat 12, its top inclined outwards; when the valve is closed, the liquid flow rate drops sharply near the valve seat 12, and impurity particles move towards the valve seat due to gravity. The valve disc 14 settles in the 12-direction direction. The bottom surface of the inclined valve disc 14 and the top surface of the outer inclined plate 15 form a guide slope. The settled impurity particles will follow these two inclined surfaces. The impurity particles of the outer inclined plate 15 will enter the drainage groove inside the valve seat 12. Since the bottom of the valve disc 14 is located in the middle of the drainage groove, the impurity particles on the valve disc 14 can slide directly into the middle of the drainage groove. The two inclined surfaces cooperate to form a guide slope, which allows the settled impurity particles to slide along the slope towards the drainage groove on the outer edge of the valve seat 12. Since the drainage groove and the discharge groove 121 are connected, the impurity particles will eventually be discharged from the valve body 1 through the discharge groove 121. The surface of the discharge groove 121 is provided with a sealing gasket. When the valve is fully closed, the valve stem 13 applies downward pressure, so that the valve disc 14 is pressed tightly against the outer inclined plate 15. The sealing gasket on the surface of the outer inclined plate 15 deforms under pressure, filling the tiny gaps and forming a tight sealing structure.

[0063] It is worth noting that in order to effectively prevent the liquid from flowing back into the valve body 1, a miniature reverse valve needs to be installed in the discharge groove 121 inside the valve body 1. When the shut-off valve is closed, under normal circumstances, impurity particles are discharged from the valve body 1 through the discharge groove 121 along with the liquid. However, if the pressure in the pipeline fluctuates or other abnormal conditions cause the liquid to flow back, the liquid may re-enter the drain groove through the discharge groove 121, thereby re-contaminating the sealing surfaces of the valve seat 12 and the valve disc 14. The reverse valve can automatically close the channel when there is a tendency for the liquid to flow back, thus preventing this from happening.

[0064] See Figures 5-7As shown, the impurity treatment component 2 is disposed within the valve seat 12 and is used to clean impurity particles from the contact surface between the outward tilting plate 15 and the valve disc 14. A liquid-blocking cylinder 141 is installed at the bottom of the valve disc 14, tightly fitted within the valve seat 12. The impurity treatment component 2 includes: at least four conical filter plates 21, all conical in shape and symmetrically installed within the valve body 1; a liquid storage tank 22, cylindrical in structure, located within the valve body 1 and corresponding to each of the conical filter plates 21, with a safety valve installed at the bottom of the liquid storage tank 22; a first return spring 23 installed on the bottom wall of the liquid storage tank 22; and an inlet plate 24 slidably connected inside the liquid storage tank 22 and fixedly connected to one end of the first return spring 23. The inlet plate 24 is hollow, and the return spring is an expansion type used to expand the inlet plate 24 within the liquid storage tank 22. A certain space is provided to facilitate the entry and storage of liquid. A drive rod 25 is slidably connected at one end to the conical filter plate 21. A liquid-proof plate 26 is installed at the bottom of the drive rod 25. A liquid distribution pipe 27 is installed inside the valve body 1, and its inlet end is connected to the safety valve through a pipe. The liquid distribution pipe 27 has two outlet ends. A hollow plate 28 is located inside the valve body 1 and is connected to one of the outlet ends of the liquid distribution pipe 27 through a pipe. A nozzle assembly 29 is installed on the hollow plate 28. A drive assembly is located inside the valve body 1 and is used to drive the drive rod 25 to move along the liquid storage tank 22.

[0065] It is worth noting that the safety valve is spring-loaded, using the spring force to balance the pressure of the medium acting on the reservoir 22. When the medium pressure exceeds the pressure value set by the spring, the spring is compressed, the safety valve opens, and the medium is discharged. When the medium pressure drops below the spring's set reseating pressure, the spring returns to its original state, the safety valve closes, and the medium continues to flow out.

[0066] The specific working steps are as follows: When the shut-off valve of this device is open, the liquid in the pipeline flows into the valve body 1 from the bottom of the valve seat 12. At this time, at least four symmetrically distributed conical filter plates 21 intercept the liquid. Their conical structure can effectively block impurities such as solid particles, sand, and rust in the liquid, allowing only clean liquid to pass through the filter plate pores. The filtered liquid enters the inlet plate 24. Since the inlet plate 24 is hollow, the liquid can flow smoothly into the connected storage tank 22 for storage.

[0067] First, the bottom of the valve disc 14 is tightly pressed against the liquid-blocking cylinder 141 of the valve seat 12. During valve closing, this effectively prevents liquid leakage from the bottom of the valve seat 12. Then, the drive assembly starts working, applying pressure to the drive rod 25. One end of the drive rod 25 is slidably connected inside the conical filter plate 21. Under pressure, the drive rod 25 drives the bottom anti-liquid plate 26 to move downward, precisely blocking the hollow channel of the inlet plate 24 and preventing liquid backflow in the storage tank 22. At the same time, the drive rod 25 continues to press down, pushing the inlet plate 24 to overcome the first reset spring. The spring 23 slides downwards, causing the liquid in the reservoir 22 to be squeezed and the pressure to gradually increase. When the pressure reaches the set value of the safety valve, the safety valve opens automatically, and the liquid in the reservoir 22 flows into the distributor pipe 27 through the pipe. The distributor pipe 27 has two outlets, one of which is connected to the hollow plate 28. The liquid enters the hollow plate 28 through this channel and is finally sprayed by the nozzle assembly 29 installed on the hollow plate 28 to thoroughly rinse the contact surface between the outward tilting plate 15 and the valve disc 14 in an all-round manner, so as to completely remove the residual impurity particles.

[0068] The conical filter plate 21 initially intercepts impurities during the liquid inflow stage, reducing the impurity content entering the liquid storage tank 22. When the valve is closed, the nozzle assembly 29 uses the stored cleaning liquid to perform a secondary flushing on the contact surfaces of the outward-curving plate 15 and the valve disc 14, forming double protection, effectively reducing the wear of impurity particles on the sealing surface, and greatly reducing the risk of scratches and pits on the sealing surface.

[0069] By filtering and storing the liquid when the valve is open, and triggering spray cleaning when the valve is closed, a fully automated process for cleaning impurities is achieved. Without manual intervention, impurities on the contact surfaces of the outer tilting plate 15 and valve disc 14 can be actively removed during the valve opening and closing process. Compared with traditional manual cleaning or passive interception methods, the cleaning efficiency is greatly improved, and the cleanliness of the sealing surface can be ensured in real time, effectively avoiding the sealing failure caused by the accumulation of impurities. Moreover, the impurity treatment component 2 is driven by the pressure changes during the valve opening and closing process, without the need for additional power equipment, which reduces energy consumption and conforms to the concept of energy conservation and environmental protection.

[0070] See Figure 6 and Figure 8 As shown, the nozzle assembly 29 includes: a nozzle cover 291, which is installed in a ring on the inner wall of the hollow disk 28, and is arranged in a long strip shape. The upper and lower ends of the long strip shape are set as inclined parts. Water spray holes 292 are opened inside the inclined parts. The water spray holes 292 below the inclined parts are arranged along the direction of the outward inclined plate 15, and the water spray holes 292 above the inclined parts are arranged along the inclined direction of the outer side of the valve disc 14.

[0071] The specific working steps are as follows: When the valve is closed, the drive component causes the liquid in the storage tank 22 to flow into the hollow plate 28 through the distribution pipe 27. The liquid then enters the nozzle cover 291, which is annularly installed on the inner wall of the hollow plate 28. The nozzle cover 291 is elongated and has inclined sections at both the top and bottom. This structural design allows the liquid to flow out from the spray holes 292 due to the guiding effect of the inclined sections. The spray holes 292 below the inclined sections are arranged along the direction of the outward inclined plate 15, so that the liquid can directly impact the outward inclined plate after being sprayed out. On the surface of the valve disc 15, impurities adhering to the outer inclined plate 15 are washed off. The water spray holes 292 above the inclined part are arranged along the inclined direction of the outer side of the valve disc 14. The sprayed liquid can flow along the inclined surface of the valve disc 14 to clean the bottom surface of the valve disc 14 and the gap between it and the outer inclined plate 15. By using the impact force and the flushing force of the liquid, impurities on the contact surface are removed in all directions, ensuring that the sealing surface between the outer inclined plate 15 and the valve disc 14 is clean, and achieving comprehensive cleaning of all parts of the sealing surface of the valve disc 14 and the outer inclined plate 15.

[0072] See Figure 2 , Figure 8 and Figure 9 As shown, the water spray hole 292 of the inclined part is inclined at an angle of sixty degrees along the direction of the outward inclined plate 15 and the valve disc 14.

[0073] The specific working steps are as follows: With the above settings, the water flow trajectory formed after the liquid is sprayed forms a specific angle with the surface of the outward tilting plate 15. This angle allows the water flow to generate sufficient impact force to flush away impurity particles when it impacts the surface of the outward tilting plate 15, and also allows the water flow to flow along the inclined surface of the outward tilting plate 15, driving the flushed impurities towards the drainage channel. Similarly, the water spray hole 292, which is tilted at sixty degrees along the valve disc 14, sprays water that impacts the bottom surface of the valve disc 14 at a sixty-degree angle. The strong impact force can effectively peel off the attached impurities. At the same time, the water flow flows along the inclined surface of the valve disc 14, gathering and guiding the impurities out, which is conducive to forming a stronger impact force on the impurity particles, making it easier to flush away stubborn impurities attached to the sealing surface, and also allowing the water flow to cover a wider area on the sealing surface, significantly improving cleaning efficiency.

[0074] See Figure 8 As shown, a spray generator 293 is installed in the hollow disk 28 between the spaced nozzle covers 291.

[0075] The specific working steps are as follows: The mist liquid generated by the spray generator 293 can evenly cover all corners of the sealing surface, especially the tiny gaps and depressions that are difficult for water flow to reach. On the one hand, the mist droplets can penetrate into the tiny gaps between impurities and the sealing surface, softening and loosening stubborn impurities. Combined with the water flow impact of the spray hole 292, the impurities are removed more thoroughly, achieving deep cleaning of the sealing surface. On the other hand, the mist liquid generated by the spray generator 293 forms a thin liquid film on the sealing surface, which plays a lubricating role. This liquid film can reduce water flow, reduce the wear of the sealing surface caused by the cleaning process, and protect the surface quality of the valve disc 14 and the outward tilting plate 15.

[0076] See Figure 4 and Figure 10 As shown, a spray groove 122 connected to the drainage groove is provided at the bottom left end of the valve seat 12. The other end of the liquid distribution pipe 27 is connected to the water outlet and the spray groove 122. The bottom wall of the drainage groove is arranged in an inclined manner from the left to the right.

[0077] The specific working steps are as follows: When the valve is closed, with the cooperation of the impurity treatment component 2, the liquid inside the storage tank 22 is sprayed onto the sealing surfaces of the outward inclined plate 15 and the valve disc 14 through the nozzle assembly 29. Another liquid flows into the spray tank 122 from the other end of the liquid distribution pipe 27. Since the bottom wall of the drainage tank is inclined from left to right, the liquid sprayed from the spray tank 122 will flow from left to right along the inclined bottom wall in the drainage tank. This liquid flow can drive the residual impurity particles in the drainage tank, causing them to move towards the discharge tank 121 at an accelerated speed. Finally, the impurities in the drainage tank are discharged through the discharge tank 121 and discharged from the valve body 1. This causes the impurities in the drainage tank to be subjected to additional pushing force. The spraying and flow of the liquid form an active cleaning of the drainage tank, preventing impurities from accumulating in the drainage tank, effectively preventing the drainage tank from being blocked, ensuring the smooth flow of impurities, and continuously maintaining the self-cleaning function of the valve.

[0078] Moreover, when the valve is open, the liquid impacts the valve, and the inclined layout of the drain channel can further ensure the cleanliness of the impurity discharge path.

[0079] See Figure 2 and Figure 11 As shown, a pressure sensor is installed at the bottom of the liquid storage tank 22, a miniature solenoid valve 211 is installed on one side of the water outlet of the liquid storage tank 22, an oil storage chamber 212 connected to the miniature solenoid valve 211 is installed inside the valve body 1, and an oil filling hole is installed at one end of the oil storage chamber 212 on the outside of the valve body 1.

[0080] The specific working steps are as follows: The liquid in the reservoir 22 is squeezed, and the pressure gradually increases. At this time, the pressure sensor installed at the bottom of the reservoir 22 monitors the internal pressure in real time. When the pressure value exceeds the preset threshold, the pressure sensor immediately transmits an electrical signal to the micro solenoid valve 211, triggering the micro solenoid valve 211 to open. The lubricating oil in the oil storage chamber 212 connected to it flows into the reservoir 22 under the action of pressure difference and mixes with the liquid in the tank. Part of the mixed liquid flows to the nozzle assembly 29 through the liquid distribution pipe 27 to clean the sealing surfaces of the outward tilting plate 15 and the valve disc 14 with the liquid flow containing lubricating oil. The other part flows to the spray tank 122 to rinse the drainage tank. The pressure sensor and the micro solenoid valve 211 constitute an intelligent control unit. The lubricating oil delivery is triggered only when the pressure in the reservoir 22 reaches the set value and the liquid is about to be discharged for cleaning. Precise control avoids the waste of lubricating oil and ensures that an appropriate amount of lubrication is obtained in each cleaning process, effectively reducing the frictional wear of components such as the valve disc 14 and the outward tilting plate 15 during the opening and closing process.

[0081] The lubricating oil in the mixture softens stubborn impurities and reduces their adhesion to the sealing surface. Combined with water flow, it removes impurities more efficiently, improving the overall cleaning effect. It is worth noting that in order to prevent excessive mixing of lubricating oil and water from producing viscous residues that affect the cleaning effect, a flow sensor is installed on the lubricating oil delivery pipeline to form a linkage control mechanism with the pressure sensor. When the pressure sensor detects that the pressure in the reservoir 22 reaches the threshold and triggers the micro solenoid valve 211, the flow sensor monitors the flow rate and flow of the lubricating oil in real time and feeds the data back to the control system. If the flow exceeds the preset upper limit, the control system automatically adjusts the opening degree or closing time of the micro solenoid valve 211 to reduce the amount of lubricating oil delivered. This ensures that the lubricating oil and water maintain a suitable mixing ratio, avoids the generation of viscous residues, and guarantees the cleaning effect of the nozzle assembly 29 and the spray channel 122 on the sealing surface and the drainage channel.

[0082] The oil filling hole on the outside of the valve body 1 allows the operator to easily replenish the lubricating oil to the oil storage chamber 212 after the lubricating oil is consumed, so as to maintain the continuous and stable operation of the system.

[0083] See Figures 12-15As shown, the impurity treatment assembly 2 further includes: air cylinders 221, of which at least two are provided and symmetrically installed inside the valve body 1; a return spring plate 222, which is installed inside the air cylinders 221; an air injection rod 223, which is slidably connected inside the air cylinders 221 and fixedly connected to the return spring plate 222, with the top of the air injection rod 223 below the drive assembly; a curved cylinder 224, of which at least two are provided, one of which is installed inside the front end of the valve body 1 and the other is installed inside the rear end of the valve body 1; and an air pipe 225, one end of which is at the air outlet of the air cylinder 221 and the other end of which is installed inside the curved cylinder 224. The air inlet of the cylinder 224; the expansion curved rod 226, which is slidably connected inside the cylinder 224, and one end of the expansion curved rod 226 extends out of the outside of the cylinder 224; the drive plate 227, of which at least two are provided, one of which is installed on the left side of the hollow plate 28, which is rotatably connected to the valve body 1, and the other is installed on the right side of the outward tilting plate 15. One end of the drive plate 227 on the left side is fixedly connected to the extended part of the expansion curved rod 226, and one end of the drive plate 227 on the right side passes through the valve seat 12 and is fixedly connected to one end of the expansion curved rod 226.

[0084] The specific working steps are as follows: When the drive assembly starts, it presses the air injection rod 223 downwards, causing the air injection rod 223 to drive the return spring plate 222 to move downwards inside the air cylinder 221. At this time, the gas inside the air cylinder 221 is compressed. The compressed gas in the front air cylinder 221 enters the left curved cylinder 224 through the air pipe 225, while the gas in the rear air cylinder 221 enters the right curved cylinder 224. As the gas enters the curved cylinder 224, the internal air pressure increases, causing the expansion curved rod 226 to extend outwards under the action of the internal air pressure. The extension of the expansion curved rod 226 in the left curved cylinder 224 drives the drive plate 227, which is fixedly connected to it, to move. The movement of the drive plate 227... The hollow disc 28 is rotated, which in turn causes the nozzle assembly 29 mounted on the hollow disc 28 to rotate. Similarly, the extension of the expansion curved rod 226 in the right curved cylinder 224 drives the outward tilting plate 15 to rotate synchronously through the connected drive plate 227. The movement of the return spring plate 222 in the air cylinder 221 is affected by the return spring. When the drive assembly stops applying pressure, the return spring plate 222 drives the air injection rod 223 to return upward under the elastic force of the return spring, and the air cylinder 221 re-intakes gas to prepare for the next drive.

[0085] With the assistance of the above functions, when the nozzle assembly 29 rotates, the water flow and mist liquid sprayed from the spray hole 292 can cover the sealing surface without dead angles. The rotation of the outward tilt plate 15 makes the corners, gaps and other areas that were originally difficult to reach fully exposed to the cleaning liquid, forming a dynamic all-round cleaning mode, which significantly improves cleaning efficiency and effect. Moreover, the rotational motion increases the contact area and contact time between the cleaning liquid and the sealing surface, thus improving cleaning efficiency.

[0086] See Figure 2 , Figure 7 , Figure 12 and Figure 13 As shown, the drive assembly includes: an arc-shaped passive plate 231, of which at least two are provided and symmetrically mounted on the top of the drive rod 25 and the air injection rod 223 located at the front and rear ends; and an active block 232, which is mounted on the top of the valve disc 14 and corresponds one-to-one with the arc-shaped passive plate 231.

[0087] The specific working steps are as follows: When it is necessary to close the valve, the operator applies pressure by operating the valve stem 13. The valve stem 13 drives the valve disc 14 to move downward. At the same time, the active block 232 moves along the arc-shaped passive plate 231. The surface is squeezed, causing the arc-shaped passive plate 231 to move downward. On the one hand, the drive rod 25 moves downward, and the liquid-proof plate 26 at the bottom of the drive rod 25 blocks the hollow channel of the liquid inlet plate 24. At the same time, the liquid inlet plate 24 is squeezed to apply pressure. On the other hand, the air injection rod 223 moves downward with the arc-shaped passive plate 231, causing the return spring plate 222 to apply downward pressure inside the air cylinder 221. Simultaneously, the liquid inside the liquid storage tank 22 and the gas in the air cylinder 221 are transferred. The drive component closely integrates the opening and closing action of the valve with the operation of the impurity treatment component 2. No additional power source or complex control system is required. Multiple functions such as sealing the liquid-proof plate 26, liquid squeezing and spraying, rotating the nozzle assembly 29 and rotating the outward tilting plate 15 can be achieved simultaneously by simply moving the valve disc 14 up and down. This simplifies the equipment structure, does not consume additional energy, and conforms to the concept of energy conservation and environmental protection.

[0088] When the shut-off valve is opened, the spring potential energy of the reset spring plate 222 is released, which drives the arc-shaped passive plate 231 to move upward. The upward movement of the arc-shaped passive plate 231 causes the drive rod 25 to move upward passively. The anti-liquid plate 26 connected to the drive rod 25 is disengaged from the inlet plate 24. At this time, the hollow channel of the inlet plate 24 is unobstructed, and the liquid in the pipeline enters through the valve seat 12, is filtered by the conical filter plate 21, and flows into the inlet plate 24, where it is stored in the liquid storage tank 22 to prepare for the cleaning work when the valve is closed next time.

[0089] The working principle of the environmentally friendly self-cleaning sealing surface shut-off valve provided by this invention is as follows:

[0090] Step 1: When the valve is opened, the liquid flows into the valve body 1 through the "low inlet, high outlet" flow channel from below the valve seat 12. The conical filter plate 21 intercepts impurities, and the clean liquid enters the storage tank 22 through the liquid inlet plate 24. At this time, the reset spring plate 222 resets in the air cylinder 221, and the air cylinder 221 draws in gas.

[0091] Step 2: The valve stem 13 moves the valve disc 14 downward. The active block 232 at the top of the valve disc 14 pushes the arc-shaped passive plate 231, and the drive rod 25 moves downward. The anti-liquid plate 26 blocks the channel of the liquid inlet plate 24 and squeezes the liquid inlet plate 24 to pressurize the liquid in the liquid storage tank 22. When the pressure reaches the safety valve setting value, the liquid flows into the liquid distribution pipe 27. One stream of liquid in the liquid distribution pipe 27 enters the nozzle assembly 29 through the hollow plate 28. The water spray hole 292 of the inclined part of the nozzle cover 291 sprays at an angle to flush the sealing surface of the outward inclined plate 15 and the valve disc 14.

[0092] Step 3: Another stream of liquid from the separator 27 flows into the spray tank 122. The inclined bottom wall of the drainage tank flushes the impurities in the drainage tank towards the discharge tank 121 for discharge.

[0093] Step 4: At the same time, the air injection rod 223 moves down to compress the gas in the air cylinder 221. The gas enters the curved cylinder 224 through the air pipe 225, pushing the expansion curved rod 226 to extend, which drives the drive plate 227 to make the nozzle assembly 29 and the outward tilting plate 15 rotate synchronously, enhancing the cleaning effect.

[0094] Step 5: When the pressure in the reservoir 22 exceeds the threshold, the pressure sensor triggers the miniature solenoid valve 211, and the lubricating oil in the oil storage chamber 212 flows into the reservoir 22 to mix with the liquid, thereby improving the cleaning and lubrication effect.

[0095] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An environmentally friendly self-cleaning sealing surface shut-off valve, characterized in that... ,include: Valve body (1); The valve seat (12) is located in the internal flow channel of the valve body (1), and a drainage groove is provided on its outer edge. A discharge groove (121) is provided on one side of the valve seat (12) and the valve body (1), and the discharge groove (121) is connected to the drainage groove. The valve stem (13) is located on the upper part of the valve body (1); The valve disc (14) is located at the bottom of the valve stem (13) and above the valve seat (12). Its bottom is inclined outward and its bottom end is located in the middle of the drain groove. An outwardly inclined plate (15) is provided on the top of the valve seat (12), the top of which is inclined outward, and a sealing gasket is provided on its surface; Impurity treatment component (2), located inside valve seat (12), is used to clean impurity particles from the contact surface between the outward tilting plate (15) and valve disc (14); A plugging cylinder (141) is installed at the bottom of the valve disc (14) and is tightly attached to the valve seat (12). The impurity treatment assembly (2) includes: The number of cone-shaped filter plates (21) is at least four, and the whole is cone-shaped and symmetrically installed in the valve body (1); The liquid storage tank (22) has a cylindrical structure and is located inside the valve body (1), corresponding one-to-one with the conical filter plate (21). A safety valve is installed at the bottom of the liquid storage tank (22). The first return spring (23) is installed on the bottom wall of the liquid storage tank (22); The liquid inlet plate (24) is slidably connected inside the liquid storage tank (22) and fixedly connected to one end of the first return spring (23). The liquid inlet plate (24) is hollow. The drive rod (25) has one end slidably connected inside the conical filter plate (21); A liquid-proof plate (26) is installed at the bottom of the drive rod (25); The separator (27) is installed inside the valve body (1), and its inlet end is connected to the safety valve via a pipe; Hollow disc (28) is located inside valve body (1) and is connected to the first outlet of the liquid separator (27) via a pipe. The nozzle assembly (29) is mounted on the hollow disk (28); A drive assembly, which is located inside the valve body (1), is used to drive the drive rod (25) to move along the liquid storage tank (22); The impurity treatment component (2) also includes: Air cylinders (221) are provided in at least two and are symmetrically installed inside the valve body (1); A reset spring plate (222) is installed inside the air cylinder (221); The air injection rod (223) is slidably connected inside the air cylinder (221) and fixedly connected to the return spring plate (222). The top of the air injection rod (223) is below the drive assembly. The curved cylinder (224) is provided in at least two, one of which is installed on the inner side of the front end of the valve body (1) and the other is installed on the inner side of the rear end of the valve body (1); The air tube (225) has one end at the outlet of the air cylinder (221) and the other end installed at the inlet of the curved cylinder (224); An expansion curved rod (226) is slidably connected inside the curved cylinder (224), and one end of the expansion curved rod (226) extends out of the outside of the curved cylinder (224); The drive plate (227) is provided in at least two, one of which is installed on the left side of the hollow disc (28) and the hollow disc (28) is rotatably connected to the valve body (1), and the other is installed on the right side of the outward tilting plate (15). The drive plate (227) on the left side is fixedly connected to the extended part of the expansion curved rod (226) at one end, and the drive plate (227) on the right side passes through the valve seat (12) and is fixedly connected to the end of the expansion curved rod (226).

2. The environmentally friendly self-cleaning sealing surface stop valve according to claim 1, characterized in that, The nozzle assembly (29) includes: The nozzle cover (291) is installed in a ring on the inner wall of the hollow plate (28) in a long strip shape, and the upper and lower ends of the strip shape are set as inclined parts. The inclined parts are provided with water spray holes (292). The water spray holes (292) below the inclined parts are arranged along the direction of the outward inclined plate (15), and the water spray holes (292) above the inclined parts are arranged along the inclined direction of the valve disc (14).

3. The environmentally friendly self-cleaning sealing surface stop valve according to claim 2, characterized in that, The water spray hole (292) of the inclined part is inclined at an angle of sixty degrees along the direction of the outward inclined plate (15) and the valve disc (14).

4. The environmentally friendly self-cleaning sealing surface shut-off valve according to claim 1, characterized in that, A spray generator (293) is installed in a hollow disc (28) between spaced nozzle hoods (291).

5. The environmentally friendly self-cleaning sealing surface stop valve according to claim 1, characterized in that, The bottom left end of the valve seat (12) is provided with a spray groove (122) that is connected to the drainage groove. The second water outlet of the liquid separator (27) is connected to the spray groove (122). The bottom wall of the drainage groove is arranged in an inclined manner from the left to the right.

6. The environmentally friendly self-cleaning sealing surface shut-off valve according to claim 1, characterized in that, A pressure sensor is installed at the bottom of the reservoir (22). A miniature solenoid valve (211) is installed on one side of the outlet end of the reservoir (22). An oil storage chamber (212) connected to the miniature solenoid valve (211) is installed inside the valve body (1). An oil filling hole is installed at one end of the oil storage chamber (212) on the outside of the valve body (1).

7. The environmentally friendly self-cleaning sealing surface stop valve according to claim 1, characterized in that, The driver components include: At least two arc-shaped passive plates (231) are provided and are symmetrically installed on the top of the drive rod (25) and the air injection rod (223) located at the front and rear ends; The active block (232) is mounted on top of the valve disc (14) and corresponds one-to-one with the arc-shaped passive plate (231).

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