Anti-clogging wear-resistant self-adaptive pressure relief slurry valve and use method thereof

Abstract

The application discloses a kind of anti-blocking wear-resistant self-adapting pressure relief slurry valve and its use method, it relates to slurry valve technical field, to solve the existing slurry valve opening and closing switch or completely closed, valve closing instant inside valve cavity can remain high-pressure slurry and stagnate gas, residual pressure cannot be quickly pressure released, it is prone to cause valve clapper jam probability problem, its technical scheme main point is including first valve body, second valve body, control module, valve cover, guide column, drive seat, drive mechanism, valve stem, valve seat and valve clapper, the top of second valve body is provided with pressure relief port, pressure relief port is provided with pressure relief flow guide assembly, the outlet of second valve body bottom is provided with pre-reserved mouth, pressure detection mechanism is mounted in pre-reserved mouth, top pressure relief port is provided with matched pressure relief flow guide assembly, high-pressure gas, suspended slurry impurities are quickly discharged in upper part of valve cavity after valve is closed, pressure detection mechanism is assembled in the pre-reserved mouth of second valve body bottom, and the flow of material is fine-tuned.

Description

Technical Field

[0001] This invention relates to the field of slurry valve technology, specifically to an anti-clogging, wear-resistant, adaptive pressure relief slurry valve and its usage method. Background Technology

[0002] Slurry valves are widely used in solid-liquid mixed slurry conveying applications where the medium typically has characteristics such as high solid content, high hardness of solid particles, strong acid and alkali corrosion, and many fiber impurities.

[0003] A search revealed that the prior art, publication number CN217784276U, discloses a steel slurry valve, comprising a valve body and a support cylinder. The support cylinder is located inside the valve body, and an installation cylinder is integrally formed in the middle of the valve body. First through holes are opened on the lower sides of the front and rear side walls and the left and right side walls of the installation cylinder. A limit ring is fixedly connected to the upper side of the inner wall of the installation cylinder, and a gear plate is fixedly connected to the top of the installation cylinder. A rotating seat is rotatably connected to the inner cavity of the installation cylinder. An inlet is opened on the lower side of the left side wall of the rotating seat, and an outlet is opened on the lower side of the right side wall of the rotating seat. A limit groove is opened around the upper circumference of the outer side wall of the rotating seat. This steel slurry valve has a reasonable structural design, can control the conveying of two types of slurry, can perform multi-mode control of the slurry valve, has a wider range of applications, and makes operation of the slurry valve under pressure simpler, saving time and effort while improving operational efficiency.

[0004] A search revealed that the prior art, publication number CN200968426Y, discloses a ceramic slurry valve, comprising a valve body, a valve seat disposed within the valve body, and a valve disc that liquid-seales with the valve seat. Ceramic sealing rings are embedded in the sealing surfaces of the valve seat and the valve disc, respectively. Since ceramic materials are much harder than tungsten carbide (HRC > 76), using ceramic materials as the sealing components of slurry valves offers advantages such as high temperature resistance, wear resistance, erosion resistance, and corrosion resistance. This extends the valve's service life, reduces maintenance frequency, improves the sealing performance of industrial pipeline systems, and minimizes media leakage. It also broadens the application range, making it suitable for various industrial fields such as power, petroleum, chemical, metallurgy, mining, and wastewater treatment. Especially in harsh conditions such as high wear, strong corrosion, high temperature, and high pressure, when conveying particulate media, it fundamentally solves the defects of valves that do not close tightly and have short service life.

[0005] The existing slurry valve has multiple bends and dead ends in the valve cavity. After the valve is opened or closed or completely closed, light suspended slurry and gas are easily trapped in the upper part of the valve cavity. When the valve is closed, high-pressure slurry and trapped gas will remain inside the valve cavity. When the residual pressure cannot be released quickly, the particles in the cavity will be squeezed into the gap between the valve disc and the valve seat sealing pair by high pressure, which can easily lead to the probability of valve disc jamming. The accumulated impurities increase the operating resistance of the valve disc, and in severe cases, directly cause the valve disc to jam, requiring manual disassembly, cleaning and depressurization. Summary of the Invention

[0006] The purpose of this invention is to provide an anti-clogging, wear-resistant, adaptive pressure relief slurry valve and its usage method.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a clog-resistant, wear-resistant, adaptive pressure relief slurry valve, comprising a first valve body, a second valve body, a control module, a valve cover, a guide post, a drive seat, a drive mechanism, a valve stem, a valve seat, and a valve disc. The second valve body is bolted to the first valve body and the valve cover. A positioning groove is provided on the end face at the connection between the first valve body and the second valve body, and the valve seat is engaged and installed inside the positioning groove. The drive seat and the valve cover are welded together by the guide post. The valve stem is slidably connected to the valve cover and the drive seat. The valve disc is detachably installed at the front end of the valve stem. A drive cavity is provided inside the drive seat, and a transmission component is installed inside the drive cavity. The drive mechanism is fixedly installed on the outside of the drive seat, and the output end of the drive mechanism is connected to the transmission component. A pressure relief port is provided at the top of the second valve body, and a pressure relief guide component is provided at the pressure relief port. A reserved port is provided at the discharge port at the bottom of the second valve body, and a pressure detection mechanism is installed inside the reserved port. The pressure detection mechanism is linked to the drive mechanism.

[0008] Preferably, the valve seat is arranged in a circular shape, and the front end of the valve disc is adapted to the valve seat. The sealing surface of the valve disc includes a high-strength alloy buffer layer and a silicon carbide nano-wear-resistant coating coated on the outer surface of the front end of the high-strength alloy buffer layer. The inner walls of the valve chambers of the first valve body and the second valve body are provided with anti-corrosion coatings.

[0009] Preferably, the pressure relief and diversion assembly includes a sleeve, an electric actuator, an anti-clogging cover, and a first pressure detector. The sleeve is integrally formed with the second valve body. The anti-clogging cover is slidably installed inside the sleeve and is adapted to the pressure relief port. The telescopic end of the electric actuator is connected to the anti-clogging cover. The first pressure detector is fixedly installed at the front end of the anti-clogging cover and is wirelessly connected to the control module. The pressure relief port is provided with a sealing step, and the diameter of the pressure relief port on the side closer to the corresponding valve cavity is smaller than the diameter on the side farther from the corresponding valve cavity. A second sealing element is provided on the outside of the front end of the anti-clogging cover to cooperate with the sealing step. The first sealing element is fitted on the outside of the anti-clogging cover and fits against the inner wall of the sleeve. The sleeve is provided with a discharge hole.

[0010] Preferably, the pressure detection mechanism includes a plug and a second pressure detector. The outer surface of the plug and the inner surface of the reserved opening are provided with threads, and the plug is threadedly installed inside the reserved opening. The front end of the plug is provided with a connection hole. A connector adapted to the connection hole is fixedly installed on the back of the second pressure detector, and the second pressure detector and the plug are connected by the connector thread. The second pressure detector is wirelessly connected to the control module.

[0011] Preferably, the transmission assembly includes a worm gear and a worm, which are rotatably mounted inside the drive cavity, with the worm meshing with one side of the worm gear. The lower part of the valve stem has a smooth outer surface, and the upper part of the valve stem has a threaded groove on its outer surface. The worm gear is threadedly fitted onto the outside of the valve stem. A sliding groove is vertically provided on the inner wall of the guide post. A connecting block is fixedly mounted on the outside of the valve stem, with both ends of the connecting block extending into the sliding groove. The connecting block is slidably connected to the guide post. A rod sleeve is provided above the drive seat and is fitted onto the outside of the valve stem.

[0012] Preferably, a mounting groove is provided at the center of the top of the valve disc, and a groove is provided on the outer wall of the front end of the valve stem. A split ring is detachably fitted inside the groove and is adapted to the mounting groove. A fixing plate is slidably fitted on the outside of the valve stem, and the fixing plate is connected to the valve disc by bolts.

[0013] Preferably, a sealing gasket is provided at the connection between the second valve body and the first valve body and the valve cover, and a graphite packing ring is provided at the connection between the valve stem and the valve cover and the guide post. The graphite packing ring is sleeved on the outside of the valve stem, and a packing sleeve is slidably fitted on the outside of the valve stem. The bottom of the packing sleeve is pressed against the top of the graphite packing ring, and the two ends of the packing sleeve are connected to the guide post through a connecting assembly.

[0014] A method of using an anti-clogging, wear-resistant, adaptive pressure relief slurry valve, comprising the anti-clogging, wear-resistant, adaptive pressure relief slurry valve as described in any one of the claims, with the specific operating steps as follows: Step 1: The control module sends a valve opening command to the drive mechanism. The drive mechanism drives the transmission components to operate, and the drive valve rod is lifted upward to disengage the valve disc from the valve seat, opening the flow channel of the valve cavity. The slurry flows into the valve cavity of the second valve body through the first valve body and passes through the valve seat to achieve continuous conveying. The high-strength alloy buffer layer and silicon carbide nano wear-resistant coating on the valve disc sealing surface continuously resist the erosion and wear of hard slurry particles. Step 2: During the slurry conveying process, the second pressure detector on the pressure detection mechanism continuously collects the pressure data at the outlet of the second valve body and uploads it to the control module in real time. The control module indirectly calculates and judges the current conveying speed and real-time flow rate based on the pressure value detected at the outlet, and compares the real-time flow rate with the system's preset conveying flow rate threshold. Step 3: When it is determined that the real-time flow rate has not reached the preset flow rate value, the control module automatically starts the drive mechanism to drive the valve stem to rise, fall, extend and retract, adjust the opening and closing flow gap between the valve disc and the valve seat, fine-tune the pipeline conveying flow rate, increase the opening degree between the valve disc and the valve seat when the real-time flow rate is insufficient, and reduce the opening degree between the valve disc and the valve seat when the real-time flow rate exceeds the standard, until the real-time flow rate matches the preset flow rate requirement. Step 4: After the material feeding is completed, the control module issues a valve closing command. The drive mechanism reverses and drives the transmission component to rotate, causing the valve stem to move downward. The valve disc presses against the valve seat, closing the flow channel of the valve cavity and cutting off the slurry conveying pipeline. At the moment the valve closes, the pressure inside the sealed valve cavity of the second valve body rises sharply. The first pressure detector monitors the residual pressure value at the top of the valve cavity in real time. Step 5: When the residual pressure exceeds the system's preset safety threshold, the control module automatically activates the electric pusher cylinder inside the pressure relief and diversion component. The electric pusher cylinder retracts and pulls the anti-blocking pressure cover away from the pressure relief port sealing step. The high-pressure gas and suspended slurry impurities trapped at the top of the valve chamber are diverted outward through the discharge hole opened on the sleeve. Step Six: During the depressurization process, the first pressure detector continuously sends pressure signals back to the control module. After the pressure inside the cavity drops to the preset safe value, the control module controls the electric push cylinder to push the anti-blocking cover forward. The second seal on the outside of the anti-blocking cover fits tightly with the sealing step of the depressurization port, automatically closing the depressurization guide assembly and terminating the depressurization operation.

[0015] In summary, the beneficial technical effects of the present invention are as follows: 1. This invention provides a pressure relief port and a matching pressure relief and flow guiding component at the top of the second valve body. Combined with a first pressure detector to monitor the residual pressure in the valve cavity in real time, when overpressure is generated in the cavity after the valve is closed, the control module automatically drives the electric push cylinder to lift the anti-blocking pressure cover, quickly discharging the high-pressure gas and suspended slurry impurities trapped in the upper part of the valve cavity. This eliminates the problem of high-pressure squeezed particles entering the gap between the valve disc and the valve seat sealing pair at the moment of valve closure. The pressure relief port adopts a stepped sealing structure, with double sealing by the first and second sealing elements. It automatically closes after pressure relief, with no medium leakage. The sleeve side wall has an inclined discharge hole for flow guiding, which can effectively prevent material accumulation and blockage in the pressure relief channel, and greatly reduce the probability of valve disc jamming and stuck. 2. The present invention is equipped with a pressure detection mechanism at the reserved port at the bottom of the second valve body. The second pressure detector continuously collects the pressure data of the discharge pipeline and wirelessly transmits it to the control module. The system can calculate the real-time conveying flow rate based on the pressure value. The control module links the drive mechanism and the worm gear transmission assembly to automatically adjust the valve disc lifting and lowering opening. If the flow is insufficient, it will automatically open larger; if the flow exceeds the standard, it will automatically close smaller. The worm gear and worm transmission have self-locking characteristics. After adjustment, the valve stem position will not be offset by the impact of the medium. The flow control accuracy is higher. The entire process is closed-loop automatic adjustment. There is no need for manual on-site valve operation, which ensures the continuous and stable flow of slurry and is suitable for continuous and quantitative conveying production processes. 3. The present invention features a double-layer structure of a high-strength alloy buffer layer and a silicon carbide nano-wear-resistant coating on the valve disc sealing surface. The high-strength alloy buffer layer buffers the impact load of hard slurry particles, while the silicon carbide nano-wear-resistant coating has ultra-high erosion resistance and wear resistance, effectively resisting long-term cutting and wear of high solid content slurry. The valve cavity inner wall is sprayed with an anti-corrosion coating, which can withstand acid and alkali corrosive slurry media and avoid internal corrosion and perforation damage to the valve body. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is the present invention. Figure 2 A magnified view of a portion of area A; Figure 4 This is a structural diagram of the pressure relief and flow guiding component of the present invention; Figure 5 This is a diagram showing the connection relationship between the valve stem and the guide post of the present invention; Figure 6 This is a diagram showing the connection relationship between the transmission component and the drive seat of the present invention; Figure 7 This is a diagram showing the connection relationship between the valve stem and the valve disc in this invention; Figure 8 This is a diagram showing the connection relationship between the valve disc and the valve seat in this invention; Figure 9 This is a structural diagram of the pressure detection mechanism of the present invention; Figure 10 This is a schematic diagram of the control principle of the present invention.

[0017] In the diagram, 1. First valve body; 2. Second valve body; 3. Control module; 4. Valve cover; 5. Guide post; 6. Drive seat; 7. Rod sleeve; 8. Drive mechanism; 9. Valve stem; 10. Pressure relief and diversion assembly; 1001. Sleeve; 1002. Electric cylinder; 1003. Discharge port; 1004. Anti-clogging cover; 1005. First seal; 1006. Second seal; 1007. First pressure detector; 11. Reserved port; 12. Pressure detection mechanism; 1201. Plug; 1202. Connection hole; 120 3. Second pressure detector; 1204. Connector; 13. Valve seat; 14. Valve disc; 1401. High-strength alloy buffer layer; 1402. Silicon carbide nano-wear-resistant coating; 15. Packing sleeve; 16. Connecting block; 17. Drive chamber; 18. Transmission assembly; 1801. Worm gear; 1802. Worm; 19. Graphite packing ring; 20. Pressure relief port; 21. Sealing gasket; 22. Slide groove; 23. Connecting assembly; 24. Mounting groove; 25. Fixing plate; 26. Groove; 27. Split ring; 28. Positioning groove. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

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

[0020] Please see Figure 1-10 The present invention provides a technical solution: an anti-clogging, wear-resistant, adaptive pressure relief slurry valve, which mainly consists of a first valve body 1, a second valve body 2, a control module 3, a valve cover 4, a guide column 5, a drive seat 6, a rod sleeve 7, a drive mechanism 8, a valve stem 9, a pressure relief and flow guiding assembly 10, a pressure detection mechanism 12, a valve seat 13, a valve disc 14, and a transmission assembly 18. The two ends of the second valve body 2 are respectively sealed to the first valve body 1 and the valve cover 4 by bolts. A sealing gasket 21 is clamped on the mating surface to achieve end face sealing. An annular positioning groove 28 is opened on the mating end face of the first valve body 1 and the second valve body 2. The annular valve seat 13 is embedded and fixed in the positioning groove 28 to achieve precise positioning of the valve seat 13 and avoid valve seat 13 displacement and slurry leakage during the conveying of slurry.

[0021] The drive seat 6 and the valve cover 4 are welded together by two guide posts 5 to ensure the overall rigidity of the drive structure. The valve stem 9 runs from top to bottom through the valve cover 4 and the interior of the drive seat 6, and can slide vertically along the guide posts 5. The lower section of the valve stem 9 is smooth and the upper section has a threaded groove. The drive seat 6 is equipped with a closed drive cavity 17. The cavity is equipped with a transmission assembly 18 consisting of a worm gear 1801 and a worm 1802. The worm gear 1801 is threaded onto the outside of the threaded groove on the upper section of the valve stem 9. The worm 1802 meshes with the worm gear 1801. The drive mechanism 8 is fixed on the outside of the drive seat 6 and connected to the input end of the worm 1802.

[0022] The valve stem 9 has a fixed connecting block 16 on its outer wall. The guide column 5 has a vertically opened sliding groove 22 on its inner wall. The two ends of the connecting block 16 extend into the sliding groove 22 and slide to limit the valve stem 9 to rotate circumferentially, while retaining only the vertical lifting freedom. The top of the drive seat 6 is equipped with a rod sleeve 7 to provide radial protection for the upper part of the valve stem 9.

[0023] A graphite packing ring 19 is fitted at the position where the valve stem 9 passes through the valve cover 4 and the guide post 5. The packing sleeve 15 is pressed onto the upper end face of the graphite packing ring 19. The two ends of the packing sleeve 15 are locked and fixed to the guide post 5 by the connecting component 23. The graphite packing 19 is pressed to achieve dynamic sealing of the valve stem 9 and prevent slurry and medium from leaking out.

[0024] The valve disc 14 is detachably mounted on the lower end of the valve stem 9. An installation groove 24 is opened in the center of the top surface of the valve disc 14. An annular groove 26 is provided on the outer wall of the bottom end of the valve stem 9. A split ring 27 is inserted into the groove 26. The split ring 27 is embedded in the installation groove 24 to complete the axial limit. A fixing plate 25 is slidably sleeved on the outer side of the valve stem 9. The fixing plate 25 is fastened to the valve disc 14 with bolts. The dual structure realizes quick disassembly and assembly of the valve disc 14. After wear, there is no need to disassemble the entire valve body. Only the valve disc 14 needs to be replaced, which reduces maintenance costs.

[0025] The valve disc 14 front sealing surface has a double-layer composite structure: the bottom layer is a high-strength alloy buffer layer 1401, and the surface layer is uniformly sprayed with silicon carbide nano wear-resistant coating 1402. The high-strength alloy buffer layer 1401 can buffer the impact of hard particles, and the silicon carbide nano wear-resistant coating 1402 greatly improves the resistance to erosion and wear. The inner walls of the entire valve cavity of the first valve body 1 and the second valve body 2 are sprayed with an integral anti-corrosion coating, which is suitable for high solid content and acid and alkali corrosive slurry conditions, and avoids internal corrosion and perforation of the valve body. The front contour of the valve disc 14 is completely fitted with the sealing surface of the annular valve seat 13, forming a line seal when the valve is closed, blocking the flow of the medium.

[0026] Worm gear drive assembly: The drive chamber 17 is internally fitted with a rotating worm gear 1801 and a worm 1802. The worm 1802 is externally connected to the output shaft of the drive mechanism 8, which is a servo motor. The internal thread of the worm gear 1801 meshes with the upper thread of the valve stem 9. The rotation of the worm gear 1801 is converted into the vertical lifting and lowering of the valve stem 9. With the guide column 5, the slide groove 22 and the connecting block 16 anti-rotation limit, the transmission is smooth and the self-locking is strong. After the valve is closed, the valve disc 14 can be kept pressed and sealed and will not be automatically released due to the impact of the medium pressure.

[0027] Discharge port pressure testing agency: The bottom outlet of the second valve body 2 has a pre-reserved threaded opening 11. The plug 1201 is installed in the pre-reserved opening 11 by tightening the external thread for sealing. The front end of the plug 1201 has a central connecting hole 1202. The back of the second pressure detector 1203 has an integrally formed connector 1204. The connector 1204 is screwed into the connecting hole 1202 to complete the detachable assembly. The second pressure detector 1203 faces the outlet flow channel of the valve cavity and collects the pipeline delivery pressure in real time. The detection data is wirelessly transmitted to the control module 3 to realize the flow linkage regulation.

[0028] Adaptive pressure relief and flow diversion components: The top of the second valve body 2 is integrally formed with a pressure relief port 20. The pressure relief port 20 has a stepped sealing step machined inside. The valve cavity has a small side hole diameter and a large outer hole diameter. An integral sleeve 1001 is matched at the position of the pressure relief port 20. An anti-clogging cover 1004 is slidably assembled inside the sleeve 1001. The outer ring of the front end of the anti-clogging cover 1004 is equipped with a second sealing element 1006, which is precisely matched with the sealing step of the pressure relief port 20 to achieve a seal. The outer ring of the middle part of the anti-clogging cover 1004 is fitted with a first sealing element 1005, which is tightly fitted with the inner wall of the sleeve 1001 to prevent slurry from leaking from the side wall of the sleeve 1001.

[0029] The sleeve 1001 has a discharge hole 1003 on its side wall for discharging high-pressure slurry and gas during pressure relief. The top of the sleeve 1001 is fixed with an electric push cylinder 1002. The telescopic end of the electric push cylinder 1002 is connected downward to the anti-blocking cover 1004, which controls the lifting and lowering of the anti-blocking cover 1004 to open and close the pressure relief channel. The front center of the anti-blocking cover 1004 is embedded with a first pressure detector 1007. The first pressure detector 1007 communicates wirelessly with the control module 3 to collect the residual pressure data at the top of the valve chamber in real time.

[0030] Step 1: The operator sends a valve opening command to the control module 3 through the host computer. The control module 3 drives the drive mechanism 8 to rotate, which drives the worm gear 1802 and worm wheel 1801 to rotate. The worm wheel 1801 drives the valve stem 9 to rise upward, and the valve disc 14 disengages from the valve seat 13, and the flow passage of the valve cavity is fully opened. High-solids slurry flows from the first valve body 1 into the valve chamber of the second valve body 2 and is conveyed downward through the valve seat 13. During the conveying process, hard particles of the slurry continuously scour the sealing surface of the valve disc 14. The high-strength alloy buffer layer 1401 buffers the impact load, the surface silicon carbide nano wear-resistant coating 1402 resists particle cutting and wear, and the internal anti-corrosion coating of the valve body isolates acid and alkali media corrosion.

[0031] Step 2: During the continuous slurry conveying stage, the second pressure detector 1203 of the pressure detection mechanism 12 at the bottom of the second valve body 2 continuously collects the medium pressure at the outlet and wirelessly uploads the pressure signal to the control module 3 in real time. The control module 3 has a built-in pressure-flow conversion program that calculates the current conveying flow rate and instantaneous flow rate based on the real-time pressure value and compares the measured flow rate with the system's preset flow rate threshold in real time.

[0032] Step 3: Control module 3 automatically performs closed-loop control after comparing the flow data. If the measured flow rate is lower than the preset threshold, the control module 3 outputs a signal to drive the drive mechanism 8 to operate in the forward direction, the valve stem 9 continues to rise, increasing the gap between the valve disc 14 and the valve seat 13, expanding the flow area, and increasing the material conveying flow rate. If the measured flow rate is higher than the preset threshold, the drive mechanism 8 will rotate in reverse, the valve stem 9 will descend slightly, reducing the sealing gap and decreasing the medium flow rate. The opening degree is continuously and dynamically adjusted until the real-time flow matches the system's set standard, achieving adaptive flow control without human intervention.

[0033] Step 4: After the material conveying is completed, the host computer issues a valve closing command. The drive mechanism 8 drives the worm gear transmission assembly 18 in the reverse direction, the valve stem 9 is fed downward, the valve disc 14 presses against the valve seat 13, completely closes the valve cavity channel, and cuts off the slurry conveying pipeline.

[0034] When the valve is closed instantaneously, the slurry and stagnant gas inside the valve cavity are compressed to form high pressure. The first pressure detector 1007 of the pressure relief and diversion assembly 10 at the top of the valve cavity continuously collects the residual pressure in the valve cavity and transmits the pressure data back to the control module 3 in real time.

[0035] Step 5: When the first pressure detector 1007 detects that the residual pressure in the valve chamber exceeds the system's preset safe pressure threshold, the control module 3 automatically starts the electric push cylinder 1002. The electric push cylinder 1002 retracts and pulls the anti-blocking cover 1004 upward, and the second seal 1006 disengages from the sealing step of the pressure relief port 20, thus opening the pressure relief channel.

[0036] The high-pressure gas, suspended light slurry, and fine impurities trapped in the upper part of the valve cavity are guided outward through the discharge hole 1003 on the side wall of the sleeve 1001 under the action of pressure difference, thereby eliminating the high pressure inside the valve cavity and preventing high-pressure slurry particles from being squeezed into the sealing gap between the valve disc 14 and the valve seat 13 and causing jamming.

[0037] Step 6: During the entire depressurization process, the first pressure detector 1007 continuously provides feedback on the pressure inside the cavity. When the pressure drops back to the system's preset safety value, the control module 3 outputs a reverse signal, the electric pusher cylinder 1002 extends downward, pushes the anti-blocking cover 1004 to reset, and the front-end second seal 1006 re-tightens the sealing step of the depressurization port 20, completely sealing the depressurization channel. The depressurization operation automatically terminates, and the valve enters a pressure-holding and static state, waiting for the next feeding command.

[0038] The first seal 1005 and the second seal 1006 are made of wear-resistant fluororubber, which is resistant to slurry corrosion and particle scratches, and extends the service life of the pressure relief port 20. The graphite packing ring 19 adopts flexible graphite composite packing, which takes into account both sealing performance and smooth sliding of valve stem 9.

[0039] Both the first pressure detector 1007 and the second pressure detector 1203 are threaded and detachable, allowing for calibration and replacement without disassembling the valve body. This makes maintenance convenient.

[0040] The valve disc 14 is fixed by the double limit of the split ring 27 and the fixing plate 25. The valve disc 14 can be removed by simply removing the bolts of the fixing plate 25. There is no need to disassemble the valve body and drive assembly. For severely worn working conditions, the sealing valve disc 14 can be quickly replaced, shortening the downtime for maintenance.

[0041] The sleeve 1001 has an inclined guide orifice 1003 for the discharge hole, which prevents the slurry from accumulating and clumping at the orifice when it is discharged under pressure. This structurally avoids blockage of the pressure relief channel and ensures smooth release of residual pressure.

[0042] In summary: This invention integrates an integrated pressure relief and flow guiding component on the top of the second valve body, and is equipped with a first pressure detector to monitor the residual pressure in the valve cavity in real time. When the residual pressure exceeds the threshold after the valve is closed, the control module automatically drives the electric push cylinder to lift the anti-blocking pressure cover, quickly releasing the high-pressure gas and suspended impurities at the top of the valve cavity. The pressure relief port adopts a stepped seal and double sealing structure, and automatically seals without leakage after pressure relief is completed. An inclined discharge hole is opened on the side wall of the sleeve to structurally prevent the pressure relief channel from accumulating and blocking, and eliminate the valve jamming problem caused by high-pressure particles squeezing into the sealing pair, eliminating the need for manual valve disassembly and slag cleaning. This invention features a pre-reserved threaded mounting position at the valve body outlet, equipped with a detachable second pressure detector. This detector collects real-time pressure data from the outlet pipeline and wirelessly transmits it to the control module. The system calculates the instantaneous flow rate based on the pressure value and automatically adjusts the valve opening by linking the servo drive mechanism and the worm gear self-locking transmission assembly. If the flow rate is insufficient, the valve opening is automatically widened; if the flow rate exceeds the limit, the valve opening is automatically narrowed, forming a fully automatic closed-loop flow control. The worm gear has a self-locking characteristic, ensuring that the valve stem will not be affected by the medium impact after adjustment, resulting in high flow stability and control accuracy. This invention adopts a double-layer composite wear-resistant sealing structure. The bottom layer of the valve disc seal is a high-strength alloy buffer layer, which buffers the impact load of hard particles and avoids brittle cracking of the wear-resistant surface. The surface is sprayed with a silicon carbide nano wear-resistant coating, which has better cutting resistance and erosion resistance than a single-layer ceramic structure. At the same time, the entire inner wall of the valve body is sprayed with an anti-corrosion coating, which greatly extends the overall service life of the valve and reduces the frequency of replacement and maintenance.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clog-resistant, wear-resistant, adaptive pressure relief slurry valve, comprising a first valve body (1), a second valve body (2), a control module (3), a valve cover (4), a guide post (5), a drive seat (6), a drive mechanism (8), a valve stem (9), a valve seat (13), and a valve disc (14). The second valve body (2) is bolted to the first valve body (1) and the valve cover (4). A positioning groove (28) is provided on the end face at the connection between the first valve body (1) and the second valve body (2), and the valve seat (13) is engaged and installed inside the positioning groove (28). The drive seat (6) and the valve cover (4) are welded together by a guide post (5). The valve stem (9) is slidably connected to the valve cover (4) and the drive seat (6). The valve disc (14) is detachably installed at the front end of the valve stem (9). The drive seat (6) has a drive cavity (17) inside. The drive cavity (17) has a transmission assembly (18) installed inside. The drive mechanism (8) is fixedly installed on the outside of the drive seat (6), and the output end of the drive mechanism (8) is connected to the transmission assembly (18). The characteristic feature is that: The second valve body (2) is provided with a pressure relief port (20) at the top, and a pressure relief guide assembly (10) is provided at the pressure relief port (20). A reserved port (11) is provided at the discharge port at the bottom of the second valve body (2). A pressure detection mechanism (12) is installed inside the reserved port (11), and the pressure detection mechanism (12) is linked with the drive mechanism (8).

2. The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to claim 1, characterized in that: The valve seat (13) is arranged in a circular shape, and the front end of the valve disc (14) is adapted to the valve seat (13). The sealing surface of the valve disc (14) includes a high-strength alloy buffer layer (1401) and a silicon carbide nano wear-resistant coating (1402) coated on the outer surface of the front end of the high-strength alloy buffer layer (1401). The inner walls of the valve chambers of the first valve body (1) and the second valve body (2) are provided with anti-corrosion coatings.

3. The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to claim 1, characterized in that: The pressure relief and diversion assembly (10) includes a sleeve (1001), an electric cylinder (1002), an anti-blocking cap (1004), and a first pressure detector (1007). The sleeve (1001) is integrally formed with the second valve body (2). The anti-blocking cap (1004) is slidably installed inside the sleeve (1001) and is adapted to the pressure relief port (20). The telescopic end of the electric cylinder (1002) is connected to the anti-blocking cap (1004). The first pressure detector (1007) is fixedly installed at the front end of the anti-blocking cap (1004). The first pressure detector (1007) is wirelessly connected to the control module (3). The pressure relief port (20) is provided with a sealing step, and the diameter of the side of the pressure relief port (20) near the corresponding valve cavity is smaller than the diameter of the side away from the corresponding valve cavity. The front end of the anti-blocking cover (1004) is provided with a second sealing element (1006) that cooperates with the sealing step. The anti-blocking cover (1004) is fitted with a first sealing element (1005), and the first sealing element (1005) is in contact with the inner wall of the sleeve (1001). The sleeve (1001) is provided with a discharge hole (1003).

4. The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to claim 1, characterized in that: The pressure detection mechanism (12) includes a plug (1201) and a second pressure detector (1203). The outer surface of the plug (1201) and the inner surface of the reserved opening (11) are provided with threads, and the plug (1201) is threadedly installed inside the reserved opening (11). The front end of the plug (1201) is provided with a connection hole (1202). The back of the second pressure detector (1203) is fixedly installed with a connector (1204) that is compatible with the connection hole (1202), and the second pressure detector (1203) and the plug (1201) are threadedly connected through the connector (1204). The second pressure detector (1203) is wirelessly connected to the control module (3).

5. The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to claim 1, characterized in that: The transmission assembly (18) includes a worm gear (1801) and a worm (1802). The worm gear (1801) and the worm (1802) are rotatably mounted inside the drive cavity (17), and the worm (1802) is meshed and mounted on one side of the worm gear (1801). The outer surface of the lower part of the valve stem (9) is smoothly provided, and the outer surface of the upper part of the valve stem (9) is provided with a threaded groove. The worm gear (1801) is threadedly fitted on the outside of the valve stem (9). A sliding groove (22) is vertically provided on the inner wall of the guide post (5). A connecting block (16) is fixedly installed on the outside of the valve stem (9), and both ends of the connecting block (16) extend into the inside of the sliding groove (22). The connecting block (16) is slidably connected to the guide post (5). A rod sleeve (7) is provided above the drive seat (6), and the rod sleeve (7) is fitted on the outside of the valve stem (9).

6. The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to claim 1, characterized in that: A mounting groove (24) is provided at the center of the top of the valve disc (14), and a groove (26) is provided on the outer wall of the front end of the valve stem (9). A split ring (27) is detachably installed inside the groove (26), and the split ring (27) is adapted to the mounting groove (24). A fixing plate (25) is slidably fitted on the outside of the valve stem (9), and the fixing plate (25) is connected to the valve disc (14) by bolts.

7. The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to claim 1, characterized in that: A sealing gasket (21) is provided at the connection between the second valve body (2) and the first valve body (1) and the valve cover (4). A graphite packing ring (19) is provided at the connection between the valve stem (9) and the valve cover (4) and the guide post (5). The graphite packing ring (19) is sleeved on the outside of the valve stem (9). A packing sleeve (15) is slidably fitted on the outside of the valve stem (9). The bottom of the packing sleeve (15) is pressed against the top of the graphite packing ring (19). The two ends of the packing sleeve (15) are connected to the guide post (5) through a connecting assembly (23).

8. A method of using an anti-clogging, wear-resistant, adaptive pressure relief slurry valve, characterized in that, The anti-clogging, wear-resistant, adaptive pressure relief slurry valve according to any one of claims 1 to 7 has the following specific operating steps: Step 1: The control module (3) sends a valve opening command to the drive mechanism (8). The drive mechanism (8) drives the transmission component (18) to operate, and the drive valve rod (9) is lifted upward to disengage the valve disc (14) from the valve seat (13), opening the flow channel of the valve cavity. The slurry flows into the valve cavity of the second valve body (2) through the first valve body (1), and passes through the valve seat (13) to achieve continuous conveying. The high-strength alloy buffer layer (1401) and silicon carbide nano wear-resistant coating (1402) on the sealing surface of the valve disc (14) continuously resist the erosion and wear of hard slurry particles. Step 2: The second pressure detector (1203) on the pressure detection mechanism (12) during the slurry conveying process continuously collects the pressure data at the outlet of the second valve body (2) and uploads it to the control module (3) in real time. The control module (3) indirectly calculates and judges the current conveying speed and real-time flow based on the pressure value detected at the outlet, and compares the real-time flow with the system's preset conveying flow threshold. Step 3: When it is determined that the real-time flow rate has not reached the preset flow rate value, the control module (3) automatically starts the drive mechanism (8) to drive the valve stem (9) to rise and fall and extend and retract, adjust the opening and closing flow gap between the valve disc (14) and the valve seat (13), fine-tune the pipeline conveying flow rate, increase the opening degree between the valve disc (14) and the valve seat (13) when the real-time flow rate is insufficient, and reduce the opening degree between the valve disc (14) and the valve seat (13) when the real-time flow rate exceeds the standard, until the real-time flow rate matches the preset flow rate requirement; Step 4: After the material is fed, the control module (3) issues a valve closing command, the drive mechanism (8) drives the transmission component (18) to run in the opposite direction, and drives the valve stem (9) to move downward. The valve disc (14) presses against the valve seat (13), closes the flow channel of the valve cavity, cuts off the slurry conveying pipeline, and at the moment the valve is closed, the pressure inside the sealed valve cavity of the second valve body (2) rises sharply. The first pressure detector (1007) detects the residual pressure value at the top of the valve cavity in real time. Step 5: When the residual pressure exceeds the system's preset safety threshold, the control module (3) automatically starts the electric push cylinder (1002) inside the pressure relief and diversion component (10). The electric push cylinder (1002) retracts and pulls the anti-blocking cover (1004) away from the pressure relief port (20) sealing step. The high-pressure gas and suspended slurry impurities trapped at the top of the valve chamber are diverted outward through the discharge hole (1003) opened on the sleeve (1001). Step 6: During the depressurization process, the first pressure detector (1007) continuously sends pressure signals back to the control module (3). After the pressure in the cavity drops back to the preset safe value, the control module (3) controls the electric push cylinder (1002) to push the anti-blocking cover (1004) forward. The second seal (1006) on the outside of the anti-blocking cover (1004) fits tightly with the sealing step of the depressurization port (20), automatically closing the depressurization guide assembly (10) and terminating the depressurization operation.

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