Intelligent measuring and controlling device and method for valve core wear of electric valve of gas well

Abstract

The present application relates to the technical field of gas well valve, and is a kind of gas well electric valve core wear intelligent measurement and control device and method, the former includes valve body, driving mechanism, valve rod, valve seat, valve core, wear measuring mechanism, position sensor and control module, and the valve body is provided with closed valve cavity in the center.The present application is reasonable and compact, the wear measuring mechanism is added to measure the valve core, the wear of the valve core is more intuitive, so that the compensation is more accurate, thereby ensuring the stability of the gas production wellhead system operation, by collecting the outlet pressure data corresponding to a certain inlet pressure when the valve core is in different positions under the condition of no wear and different wear amounts, providing data support for wear compensation;The wear measuring mechanism obtains the direct wear amount, which is more direct and accurate than the wear amount calculated by pressure, so as to compensate according to the wear condition and ensure the stability of the gas production wellhead system operation.

Description

Technical Field

[0001] This invention relates to the field of gas well valve technology, and is a smart device and method for measuring and controlling the wear of the valve core of a gas well electric valve. Background Technology

[0002] Because the electric regulating valve at the gas wellhead operates in a complex and ever-changing environment, the valve core is easily affected by various factors such as fluid erosion and media corrosion, leading to frequent wear. The wear condition of the valve core directly affects the operating efficiency and safety of the gas wellhead system.

[0003] Chinese patent document CN118050992A, entitled "Method, Apparatus, Device, and Storage Medium for Optimizing Throttling Valve Opening Control Quantity," discloses a method for optimizing throttle valve opening control quantity. The method includes: obtaining a first input layer result and a second input layer result based on the current and desired pressure values ​​of the current cycle; wherein the current pressure value is determined based on historical control quantities from the previous cycle; the first input layer result is obtained by inputting the current pressure value into the first input layer neurons of a BP neural network; and the second input layer result is obtained by inputting the desired pressure value into the second input layer neurons of a BP neural network. Finally, a hidden layer result is obtained based on the first and second input layer results, wherein the hidden layer result is obtained by inputting the first and second input layer results into the hidden layer neurons of a BP neural network. Based on the hidden layer results, output layer results are obtained, which are the results obtained by inputting the hidden layer results into the output layer neurons of the BP neural network. Based on the output layer results and the sampling period, PID parameters are determined, where the sampling period is determined according to the period for collecting the current casing pressure value. Based on the PID parameters, the current casing pressure value, and the desired casing pressure value, a target control quantity is obtained. Based on the target control quantity, the current casing pressure value is adjusted. The method of this application, by combining a BP neural network with a PID controller, can respond to different working conditions at the oil drilling site in real time and adaptively optimize the PID parameters at the control algorithm level according to different working conditions, thereby improving the control accuracy of the throttle valve opening.

[0004] Chinese patent document CN116519290A, entitled "An Intelligent Detection and Compensation Method for Valve Core Wear of Electric Control Valve at Gas Wellhead," discloses an intelligent detection and compensation method for valve core wear of an electric control valve at a gas wellhead. The method includes: Step 1. Designing an opening-pressure-flow model: When the valve core of the electric control valve at the gas wellhead has no wear, production data is obtained using pressure closed-loop control, and then an opening-pressure-flow model of the electric control valve at the gas wellhead is established based on the production data; Step 2. Designing an intelligent valve wear detection method: Inputting a set pressure value into the opening-pressure-flow model and the opening compensation algorithm, calculating the valve opening of the electric control valve at the gas wellhead under the set pressure using the obtained opening-pressure-flow model, obtaining the actual pressure of the electric control valve at the gas wellhead using a valve pressure sensor, and comparing the set pressure with the actual pressure in the opening compensation algorithm. If the actual pressure reaches the set pressure value at this opening, it indicates that the valve core wear of the electric control valve at the gas wellhead is minimal or even nonexistent, and is considered... Under normal conditions, if the actual pressure does not reach the set pressure value at this opening degree, it indicates that the valve core of the gas wellhead electric regulating valve is worn and needs compensation. The difference between the two, i.e., the pressure deviation, is used as one of the inputs to the opening degree compensation algorithm. Step 3. Design the opening degree compensation algorithm. The RBF neural network combined with the PID control algorithm is used as the opening degree compensation algorithm. The parameters in the RBF neural network and the PID are initialized. By learning the input data in the RBF neural network, the PID is optimized to obtain the optimized parameters suitable for the PID control system. Based on the RBF neural network, the data is analyzed, and the control parameters learned by the PID control system are adjusted in real time, thereby automatically realizing the adjustment and correction of the PID control system parameters to achieve the purpose of intelligent detection and compensation of valve core wear of the gas wellhead electric regulating valve. It judges the degree of valve core wear by detecting the valve pressure. This method can achieve preliminary detection and judgment of valve core wear to a certain extent, providing a basis for subsequent maintenance and replacement.

[0005] The above method only judges the wear of the valve by collecting the valve pressure and fails to directly measure the actual wear of the valve core. In complex and ever-changing mining environments, it may not be able to accurately judge the wear condition and trend of the valve core, resulting in inaccurate timing of maintenance and replacement, and increasing the uncertainty and risk of system operation. Summary of the Invention

[0006] This invention provides an intelligent measurement and control device and method for valve core wear of gas well electric valves, which overcomes the shortcomings of the prior art. It can effectively solve the problem that existing electric valves cannot directly measure the actual wear of the valve core, thus failing to accurately judge the wear status and trend of the valve core, which increases the uncertainty and risk of system operation.

[0007] One of the technical solutions of this invention is achieved through the following measures: A smart device for measuring and controlling the wear of a gas well electric valve core, comprising a valve body, a drive mechanism, a valve stem, a valve seat, a valve core, a wear measuring mechanism, a position sensor, and a control module. The valve body has a closed valve cavity in the center, an inlet at the left end of the valve body with its right end connected to the lower left side of the valve cavity, and an outlet at the right end of the valve body with its left end connected to the upper right side of the valve cavity. A hollow valve seat is fixed to the inner wall of the valve cavity at the position corresponding to the inlet and outlet. A sealing channel is provided at the upper end of the valve body at the position corresponding to the valve seat, with its lower end connected to the upper part of the valve cavity. A valve cover is fixedly installed at the upper end of the valve body, and a valve stem with its lower end located inside the upper inner side of the valve cavity is rotatably installed within the valve cover. The lower end of the valve stem is fixed... A valve core is installed, and a drive mechanism is fixedly installed on the upper side of the valve cover. The output shaft of the drive mechanism is driven together with the upper end of the valve stem. When the output shaft of the drive mechanism rotates, it can cause the valve core to move downward to close the valve seat or move upward to open the valve seat. The upper end of the valve seat is provided with a wear measuring mechanism that can detect the wear of the valve core. The left side of the valve body is provided with a first pressure sensor that can detect the inlet pressure, and the right side of the valve body is provided with a second pressure sensor that can detect the outlet pressure. The upper part of the valve cover is provided with a position sensor that can detect the displacement of the upper end of the valve stem. The first pressure sensor, the second pressure sensor, the position sensor, and the wear measuring mechanism are all connected to the control module, and the control module is connected to the drive mechanism.

[0008] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions: The aforementioned wear measurement mechanism may include a housing, a rotating plate, an elastic reset element, and a displacement sensor. The lower outer side of the valve core has a tapered sealing surface that is wider at the top and narrower at the bottom. The inner wall of the valve seat is tapered, matching the tapered sealing surface. A mounting groove with an opening to the right is provided on the left inner wall of the valve cavity corresponding to the upper position of the valve seat. The housing is fixedly installed in the mounting groove. A measuring hole with internal and external communication is provided on the right side of the housing. A rotating plate with a right-side seal passing through the measuring hole is rotatably installed on the inner side of the right side of the housing. An elastic reset element is installed between the left side of the rotating plate and the inner side of the housing. The elastic reset element allows the right side of the rotating plate to abut against the outer left side of the valve core. A displacement sensor is installed on the inner lower part of the housing corresponding to the position below the elastic reset element. The detection end of the displacement sensor is in contact with the left side of the rotating rod. The displacement sensor can detect the wear amount of the tapered sealing surface of the valve core. The displacement sensor is connected to the control module.

[0009] The aforementioned wear measuring mechanism may further include a rotating pin, a sliding rod, and a limiting block. The rotating plate is fan-shaped, and a through-hole is provided on the front side of the upper part of the rotating plate. A rotating pin is fixedly installed in the fixing hole. The front and rear ends of the rotating pin are rotatably installed together with the inner right side of the outer shell. An arc-shaped guide hole coaxial with the rotating pin is provided on the left side of the rotating plate. A sliding rod is fitted in the guide hole. The upper left end of the sliding rod is fixedly installed together with the inner upper part of the outer shell. An elastic reset component is fitted on the outer side of the sliding rod between the inner side of the outer shell and the left side of the rotating plate. A limiting block is fixedly installed on the lower left side of the rotating plate. A baffle plate whose left side abuts against the right side of the limiting block is fixedly installed on the inner right side of the outer shell at the position below the rotating plate.

[0010] The thickness of the rotating plate can gradually decrease from top to bottom. An arc-shaped wear-resistant plate is fixed to the lower right side of the rotating plate. The cross-section of the wear-resistant plate is an arc shape with an opening to the left.

[0011] A circular support plate fitted onto the outside of the valve stem can be fixedly installed on the lower side of the valve cover. Several arc-shaped support blocks with inward openings are evenly distributed along the circumference at the lower end of the support plate, and the inner side of each support block is in contact with the outer side of the valve core.

[0012] The valve cover has a through mounting hole in the center. A connecting sleeve is fixedly installed on the upper end of the valve cover corresponding to the mounting hole. The upper end of the valve stem passes through the mounting hole and is fitted into the connecting sleeve. A sealing packing is provided between the inner wall of the mounting hole and the outer side of the valve stem. An adjusting nut screwed to the upper outer side of the valve stem is fixedly installed in the connecting sleeve above the sealing packing. A mounting shell is fixedly installed on the upper end of the connecting sleeve. A left guide rod and a right guide rod are fixedly installed in the mounting shell at intervals. The left and right parts of the sliding seat are respectively fitted onto the outer side of the left guide rod and the outer side of the right guide rod. The drive mechanism is fixedly installed on the upper side of the sliding seat. The lower end of the output shaft of the drive mechanism is driven together with the upper end of the valve stem. The right side of the sliding seat is installed together with the detection end of the position sensor.

[0013] The second technical solution of the present invention is achieved through the following measures: a control method for a gas well electric valve core wear intelligent monitoring and control device, comprising: S1, collect sample data, including: When the inlet pressure is a set value and the wear of the valve core is 0, the outlet pressure corresponding to the valve core at different height positions in the valve cavity is collected, and a first database is established. When the inlet pressure is a set value and the wear of the valve core is greater than 0, the outlet pressure corresponding to different height positions of the valve core in the valve cavity and different wear amounts of the valve core is collected, and a second database is established. S2, obtain the required outlet pressure, compare the required outlet pressure with the first database, and obtain the first height position when the wear of the valve core is 0; S3, the drive mechanism works and causes the valve core to move to the first height position; S4, during the process of the valve core moving to the first height position, the actual wear of the valve core is collected; If the actual wear is 0, the valve core moves to the first height position; If the actual wear is greater than 0, the required outlet pressure and the actual wear are compared with the second database to obtain the second height position corresponding to the actual wear of the valve core; the valve core is then moved to the second height position.

[0014] This invention features a reasonable and compact structure. By adding a wear measurement mechanism to measure the valve core, the wear of the valve core is more intuitively represented, making compensation more accurate and ensuring the stability of the gas wellhead system. By collecting data on the outlet pressure corresponding to a certain inlet pressure when the valve core is in different positions under no-wear and different wear conditions, data support is provided for wear compensation. The wear measurement mechanism measures the outer surface of the valve core to obtain the direct wear amount, which is more direct and accurate than the wear amount calculated by pressure. Compensation is then performed according to the wear condition, ensuring the stability of the gas wellhead system. By setting up a first pressure sensor and a second pressure sensor, the inlet and outlet pressures of the valve body can be monitored in real time. Attached Figure Description

[0015] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments one to six of the present invention.

[0016] Appendix Figure 2 This is a schematic diagram of the front cross-sectional structure of the wear measurement mechanism in Embodiments 1 to 6 of the present invention.

[0017] Appendix Figure 3 For the appendix Figure 2 A three-dimensional enlarged structural diagram of the rotating plate.

[0018] Appendix Figure 4 For the appendix Figure 1 A three-dimensional enlarged structural diagram of the central support plate.

[0019] Appendix Figure 5 These are schematic diagrams of the circuit structures of embodiments one through six of the present invention.

[0020] Appendix Figure 6 This is a flowchart of the method in Embodiment Seven of the present invention.

[0021] The codes in the attached diagram are as follows: 1 for valve body, 2 for drive mechanism, 3 for valve stem, 4 for valve seat, 5 for valve core, 6 for position sensor, 7 for control module, 8 for valve cavity, 9 for inlet, 10 for outlet, 11 for equipment cover, 12 for sealing channel, 13 for valve cover, 14 for first pressure sensor, 15 for second pressure sensor, 16 for outer shell, 17 for rotating plate, 18 for elastic reset element, 19 for displacement sensor, 20 for conical sealing surface, 21 for mounting groove, 22 for rotating pin, 23 for slide rod, 24 for limit block, 25 for guide hole, 26 for baffle, 27 for wear-resistant plate, 28 for support plate, 29 for support block, 30 for connecting sleeve, 31 for sealing packing, 32 for adjusting nut, 33 for mounting shell, 34 for left guide rod, 35 for right guide rod, and 36 for sliding seat. Detailed Implementation

[0022] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0023] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0024] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 2As shown in Figure 5, the intelligent monitoring and control device for wear of the gas well electric valve core includes a valve body 1, a drive mechanism 2, a valve stem 3, a valve seat 4, a valve core 5, a wear measurement mechanism, a position sensor 6, and a control module 7. The valve body 1 has a closed valve cavity 8 in the center. The left end of the valve body 1 has an inlet 9 whose right end connects to the lower left side of the valve cavity 8. The right end of the valve body 1 has an outlet 10 whose left end connects to the upper right side of the valve cavity 8. A hollow valve seat 4 is fixed to the inner wall of the valve cavity 8 at the position between the inlet 9 and the outlet 10. A sealing channel 12, whose lower end connects to the upper part of the valve cavity 8, is located at the upper end of the valve body 1 corresponding to the position of the valve seat 4. A valve cover 13 is fixedly installed on the upper end of the valve body 1. A valve stem 3, whose lower end is located on the upper inner side of the valve cavity 8, is rotatably installed inside the valve cover 13. The valve core 5 is fixedly installed on the lower end of the valve stem 3. A drive mechanism 2 is fixedly installed on the upper side of valve cover 13. The output shaft of the drive mechanism 2 is driven together with the upper end of valve stem 3. When the output shaft of the drive mechanism 2 rotates, it can cause valve core 5 to move downward to close valve seat 4 or move upward to open valve seat 4. A wear measuring mechanism that can detect the wear of valve core 5 is provided on the upper end of valve seat 4. A first pressure sensor 14 that can detect the pressure of inlet 9 is provided on the left side of valve body 1. A second pressure sensor 15 that can detect the pressure of outlet 10 is installed on the right side of valve body 1. A position sensor 6 that can detect the displacement of the upper end of valve stem 3 is installed on the upper part of valve cover 13. The first pressure sensor 14, the second pressure sensor 15, the position sensor 6, and the wear measuring mechanism are all connected to the control module 7. The control module 7 is connected to the drive mechanism 2.

[0025] According to the requirements, the upper right side of the valve body 1 is provided with a left acquisition hole communicating with the inlet 9. A left mounting seat is fixedly installed in the left acquisition hole, and the first pressure sensor 14 is fixedly installed in the left mounting seat. The upper right side of the valve body 1 is provided with a right acquisition hole communicating with the outlet 10. A right mounting seat is fixedly installed in the right acquisition hole, and the second pressure sensor 15 is fixedly installed in the right mounting seat. The first pressure sensor 14 and the second pressure sensor 15 are both existing known technologies, such as the PA202 pressure transmitter. Both the left and right mounting seats can be existing known threaded sleeves.

[0026] During use, the first pressure sensor 14 can collect the pressure at the inlet 9, which helps to ensure the stability of the inlet 9 pressure and make the inlet 9 pressure the set value. When the inlet 9 pressure is the set value, the valve core 5 collects the outlet 10 pressure when the valve core 5 is in different positions under the conditions of no wear and different wear.

[0027] The wear measurement mechanism collects different wear amounts of valve core 5. S0, S1, S2, S3, S4... Si (i is a natural number) represent different wear amounts, where S0 represents the wear amount in the case of no wear, that is, S0 is 0, and S1, S2, S3, S4... Si are all greater than 0.

[0028] Position sensor 6 collects the displacement of the upper end of valve stem 3, that is, the displacement of valve stem 3 relative to the initial position. The initial position is the position of the upper end of valve stem 3 when valve core 5 closes valve seat 4. The distance between the lower end face of valve core 5 and the lower end face of valve seat 4 is the minimum. The distance between the lower end face of valve core 5 and the lower end face of valve seat 4 can be expressed as the opening degree of valve core 5. That is, position sensor 6 collects different opening degrees of valve core 5, and uses L1, L2, L3, L4... Lj (j is a positive integer) to represent different opening degrees of valve core 5 respectively. L1, L2, L3, L4... Lj are all greater than 0. Pij represents the wear amount of valve core 5 as Si and the outlet pressure of valve core 5 when the opening degree is Lj. The outlet pressure of 10 is collected by the second pressure sensor 15.

[0029] When the inlet pressure 9 is the set value, a sample library is established by collecting the wear amount Si of valve core 5 collected by the wear measurement mechanism, the valve core 5 opening Lj collected by the position sensor 6, and the outlet pressure Pij collected by the second pressure sensor 15.

[0030] In use, the control module 7 first compares the required outlet 10 pressure with the outlet 10 pressure in the sample library to obtain P0j (where P0j is the outlet 10 pressure when the wear of valve core 5 is S0 and the valve core 5 opening is Lj) when the required outlet 10 pressure is the same as the outlet 10 pressure in the sample library. Then, it obtains the corresponding valve core 5 opening Lj in the sample library when the wear is 0, i.e., it finds the valve core 5 opening Lj corresponding to P0j in the sample library. Next, the control module 7 causes the drive mechanism 2 to work, and the valve core 5 moves to the position corresponding to the valve core 5 opening Lj. During the process, the wear measurement mechanism collects the actual wear amount of valve core 5. If the actual wear amount is 0, the valve core 5 moves to the position corresponding to the valve core 5 opening Lj. If the actual wear amount is greater than 0, the actual wear amount is compared with the wear amount Si of valve core 5 in the sample library. The Si in the sample library is found when the wear amount is the same as the actual wear amount. Then, the valve core 5 opening Lj corresponding to Si and Pij when the outlet 10 pressure to be obtained is the same as the outlet 10 pressure in the sample library is found. Then, the drive mechanism 2 works to make the valve core 5 move to the valve core 5 position corresponding to the valve core 5 opening Lj.

[0031] In a specific embodiment, the control module 7 first compares the required outlet 10 pressure with the outlet 10 pressure in the sample library to obtain P04 when the required outlet 10 pressure is the same as the outlet 10 pressure in the sample library. Then, the control module 7 finds the valve core 5 opening L4 corresponding to P04 in the sample library. Next, the control module 7 causes the drive mechanism 2 to work, and the valve core 5 moves to the position corresponding to the valve core 5 opening L4. During the movement, the actual wear amount of the valve core 5 collected by the wear measurement mechanism is greater than 0. The actual wear amount is compared with the wear amount Si of the valve core 5 in the sample library. The wear amount in the sample library is found to be the same as the actual wear amount, which is S2. Then, the required outlet 10 pressure is found to be the same as the outlet 10 pressure in the sample library, such as P26. Then, the valve core 5 opening L6 is found based on S2 and P26. Finally, the drive mechanism 2 works to move the valve core 5 to the valve core 5 position corresponding to the valve core 5 opening L6.

[0032] This intelligent wear monitoring and control device for the valve core of a gas well electric valve, by adding a wear measurement mechanism to measure the valve core 5, makes the wear of the valve core 5 more intuitive and the compensation more accurate, thereby ensuring the stability of the gas wellhead system. By collecting data on the outlet pressure 10 corresponding to a certain inlet pressure 9 when the valve core 5 is in different positions under no-wear and different wear conditions, data support is provided for wear compensation. The wear measurement mechanism measures the outer surface of the valve core 5 to obtain the direct wear amount, which is more direct and accurate than the wear amount calculated by pressure, thereby compensating according to the wear condition and ensuring the stability of the gas wellhead system. By setting the first pressure sensor 14 and the second pressure sensor 15, the inlet and outlet pressures 10 of the valve body 1 can be monitored in real time.

[0033] The above-mentioned intelligent monitoring and control device for wear of gas well electric valve cores can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2As shown in Figures 3 and 5, the wear measurement mechanism includes a housing 16, a rotating plate 17, an elastic reset component 18, and a displacement sensor 19. The lower outer side of the valve core 5 is provided with a tapered sealing surface 20, which is larger at the top and smaller at the bottom. The inner wall of the valve seat 4 is tapered, matching the tapered sealing surface 20. The left inner wall of the valve cavity 8, corresponding to the upper position of the valve seat 4, is provided with a mounting groove 21 opening to the right. The housing 16 is fixedly installed in the mounting groove 21. The right side of the housing 16 is provided with a measuring hole that communicates internally and externally. A right-side sealing sensor is rotatably installed on the inner side of the right side of the housing 16. A rotating plate 17 with a measuring orifice is provided. An elastic reset member 18 is installed between the left side of the rotating plate 17 and the inner side of the outer shell 16. The elastic reset member 18 allows the right side of the rotating plate 17 to abut against the outer left side of the valve core 5. A displacement sensor 19 is installed on the inner lower part of the outer shell 16 below the elastic reset member 18. The detection end of the displacement sensor 19 is in contact with the left side of the rotating rod. The displacement sensor 19 can detect the wear of the conical sealing surface 20 of the valve core 5. The displacement sensor 19 is connected to the control module 7.

[0034] Depending on the requirements, the displacement sensor 19 is based on existing known technology, such as the Keyence GT2 series contact digital sensor. A connecting seat is provided between the left end of the displacement sensor 19 and the inner wall of the housing 16. The connecting seat facilitates the installation of the displacement sensor 19 inside the housing 16.

[0035] During use, the detection end of the displacement sensor 19 is in contact with the left side of the rotating plate 17. The elastic reset member 18 ensures that the lower right end of the rotating plate 17 is always in contact with the conical sealing surface 20 of the valve core 5. In this way, the detection end of the displacement sensor 19 can measure the wear of the conical sealing surface 20 according to the swing amplitude of the rotating plate 17.

[0036] The lower outer side of the valve core 5 is provided with a conical sealing surface 20 that is larger at the top and smaller at the bottom. This ensures that even if the conical sealing surface 20 is worn and moves downwards, it can still fit against the inner wall of the valve seat 4, thus ensuring the sealing of the inner side of the valve seat 4.

[0037] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 2 , 3As shown, the wear measuring mechanism also includes a rotating pin 22, a sliding rod 23, and a limiting block 24. The rotating plate 17 is fan-shaped. The upper front side of the rotating plate 17 has a through-hole. The rotating pin 22 is fixedly installed in the fixing hole. The front and rear ends of the rotating pin 22 are rotatably installed together with the inner right side of the outer shell 16. The left side of the rotating plate 17 has an arc-shaped guide hole 25 coaxial with the rotating pin 22. The sliding rod 23 is fitted inside the guide hole 25. The upper left end of the sliding rod 23 is fixedly installed together with the inner upper part of the outer shell 16. The elastic reset member 18 is fitted on the outside of the sliding rod 23 between the inner side of the outer shell 16 and the left side of the rotating plate 17. The limiting block 24 is fixedly installed on the lower left side of the rotating plate 17. The baffle 26, which abuts against the right side of the limiting block 24, is fixedly installed on the inner right side of the outer shell 16 corresponding to the position below the rotating plate 17.

[0038] According to the requirements, a sealing ring that matches the rotating plate 17 is installed in the measuring hole to ensure the sealing performance inside the outer shell 16. The rotating plate 17 is fan-shaped, which ensures that the surface of the rotating plate 17 can fit the sealing ring during the rotation process. The lower right side of the rotating plate 17 can always contact the conical sealing surface 20 of the valve core 5. In this way, the detection end of the displacement sensor 19 can accurately measure the swing amplitude of the rotating plate 17, thereby obtaining the wear amount of the conical sealing surface 20 of the valve core 5.

[0039] A fixed seat is provided on the top of the inner wall of the outer casing 16. The upper end of the slide rod 23 is fixedly installed together with the lower part of the fixed seat. The slide rod 23 is an arc shape with the opening facing upward and concentric with the center of the cross section of the rotating pin 22. That is, the slide rod 23 is an arc-shaped rod with the center of the rotating pin 22 as the center. The elastic reset member 18 is a compression spring on the outside of the slide rod 23 between the fixed seat and the rotating plate 17. The compression spring ensures that the lower right side of the rotating plate 17 can press against the conical sealing surface 20 of the valve core 5. The compression spring and the slide rod 23 can resist the action of the fluid on the rotating plate 17, prevent the rotating plate 17 from vibrating, reduce the influence of the fluid on the rotating plate 17, and thus maintain the stability of the rotating plate 17 during the measurement process.

[0040] The baffle 26 and the limiting block 24 are designed so that the inner wall of the outer shell 16 can limit the rotation plate 17, preventing leakage from occurring inside the outer shell 16 when the lower left side of the rotation plate 17 is located to the right of the outer shell 16 after the rotation angle of the rotation plate 17 is too large.

[0041] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 2 , 3 As shown, the thickness of the rotating plate 17 gradually decreases from top to bottom. An arc-shaped wear-resistant plate 27 is fixed to the lower right side of the rotating plate 17. The cross-section of the wear-resistant plate 27 is an arc shape with an opening to the left.

[0042] According to requirements, the cross-section of the rotating plate 17 is V-shaped with the opening facing upwards. A fixing groove is provided on the lower right side of the rotating plate 17, and the wear-resistant plate is fixed in the fixing groove. During use, the cross-section of the wear-resistant plate 27 is arc-shaped with the opening facing left. This makes the lower right side and bottom of the rotating plate 17 transition with an arc, which can reduce the friction between the wear-resistant plate 27 and the conical sealing surface 20 of the valve core 5, and avoid the wear-resistant plate 27 causing wear to the conical sealing surface 20 of the valve core 5. The wear-resistant plate 27 is fixed with a wear-resistant layer formed of alloy steel, which can improve the wear resistance of the wear-resistant plate 27.

[0043] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 4 As shown in Figure 5, a circular support plate 28 is fixedly installed on the lower side of the valve cover 13 and fitted onto the outer side of the valve stem 3. Several arc-shaped support blocks 29 with inward openings are evenly distributed along the circumference at the lower end of the support plate 28. The inner side of each support block 29 is in contact with the outer side of the valve core 5.

[0044] During use, the arc-shaped support block 29 can support the valve core 5, preventing the valve core 5 from swaying during its up-and-down movement. This improves the stability of the valve core 5 and facilitates the measurement of surface changes of the conical sealing surface 20 of the valve core 5, thereby ensuring the accuracy of the wear measurement of the valve core 5 and making the control of the valve core 5 more precise.

[0045] Example 6: As an optimization of the above examples, as shown in the appendix Figure 1 , 2 As shown, the valve cover 13 has a through mounting hole in the center. A connecting sleeve 30 is fixedly installed on the upper end of the valve cover 13 corresponding to the mounting hole. The upper end of the valve stem 3 passes through the mounting hole and is fitted into the connecting sleeve 30. A sealing packing 31 is provided between the inner wall of the mounting hole and the outer side of the valve stem 3. An adjusting nut 32 screwed to the upper outer side of the valve stem 3 is fixedly installed in the connecting sleeve 30 above the sealing packing 31. A mounting shell 33 is fixedly installed on the upper end of the connecting sleeve 30. A left guide rod 34 and a right guide rod 35 are fixedly installed in the mounting shell 33 at intervals. The left and right parts of the sliding seat 36 are respectively fitted on the outer side of the left guide rod 34 and the outer side of the right guide rod 35. The drive mechanism 2 is fixedly installed on the upper side of the sliding seat 36. The lower end of the output shaft of the drive mechanism 2 is driven together with the upper end of the valve stem 3. The right side of the sliding seat 36 is installed together with the detection end of the position sensor 6.

[0046] According to the requirements, the mounting shell 33 is a box-shaped structure with an open top. The equipment cover 11 is fixedly installed on the upper side of the mounting shell 33. The control module 7 is fixedly installed on the upper inner side of the equipment cover 11. The upper outer side of the left guide rod 34 and the upper outer side of the right guide rod 35 are both fitted with fixing sleeves. The upper ends of the fixing sleeves are fixedly installed together with the corresponding positions on the inner side of the equipment cover 11. The sealing packing 31 is a known packing assembly, or it can be a known sealing seat, to ensure the sealing performance on both sides of the sealing seat. The drive mechanism 2 is a known motor. The lower end of the output shaft of the drive mechanism 2 is connected to the upper end of the valve stem 3 through a known coupling. The position sensor 6 is a known technology. The position sensor 6 can be a DSM miniature pull rod type linear displacement sensor. The position sensor 6 is installed to the right of the right guide rod 35. The pull rod of the position sensor 6 is fixed to the sliding seat 36. To facilitate the installation of the position sensor 6's pull rod and the sliding seat 36, a U-shaped connecting groove with its opening facing right is provided on the front right side of the sliding seat 36. The pull rod of the position sensor 6 is located in the U-shaped connecting groove. The outside of the pull rod of the position sensor 6 is fixedly installed to the sliding seat 36 by two locking screws. A connecting plate can also be installed between the pull rod of the position sensor 6 and the sliding seat 36 to facilitate the installation and removal of the position sensor 6. The position sensor 6 can also be a B151 series sensor with a scale indicator, or an LC grating ruler. The upper end of the displacement sensor 19 is fixedly installed to the upper part of the right guide rod 35 by a fixing bracket. The lower end of the displacement sensor 19 is fixedly installed to the lower inner wall of the mounting housing 33. The detection end of the displacement sensor 19 is fixedly installed to the right side of the sliding seat 36.

[0047] During use, after the drive mechanism 2 is activated, its output shaft drives the valve stem 3 to rotate. The valve stem 3 rotates within the adjusting nut 32. Simultaneously, under the action of the left guide rod 34 and the right guide rod 35, the sliding seat 36 moves up and down with the valve stem 3. The up and down movement of the valve stem 3 drives the valve core 5 to move up and down. At the same time, the sliding seat 36 drives the detection end of the displacement sensor 19 to move up and down. By measuring the up and down movement distance of the sliding seat 36, the up and down movement distance of the valve core 5 can be obtained, that is, the distance between the lower end of the valve core 5 and the lower end face of the valve seat 4 can be obtained. The position of the valve core 5 in the valve cavity 8 can be determined, thereby determining the opening degree of the valve core 5.

[0048] Example 7: As attached Figures 1 to 6 As shown, the control method of the intelligent monitoring and control device for wear of the gas well electric valve core includes: S1, collect sample data, including: When the inlet pressure 9 is a set value and the wear of valve core 5 is 0, the outlet pressure 10 corresponding to multiple height positions of valve core 5 in valve cavity 8 is collected and a first database is established. When the pressure at inlet 9 is a set value and the wear of valve core 5 is greater than 0, the pressure at outlet 10 corresponding to multiple height positions of valve core 5 in valve cavity 8 is collected, and a second database is established. S2, obtain the required outlet 10 pressure, compare the required outlet 10 pressure with the first database, and obtain the first height position when the valve core 5 is not worn; S3, the drive mechanism 2 works and causes the valve core 5 to move to the first height position; S4, during the process of valve core 5 moving to the first height position, the actual wear of valve core 5 is collected; If the actual wear is 0, the valve core 5 moves to the first height position; If the actual wear is greater than 0, the required outlet pressure 10 and the actual wear are compared with the second database to obtain the second height position corresponding to the actual wear of valve core 5; valve core 5 is moved to the second height position.

[0049] During use, the first pressure sensor 14 can collect the pressure at the inlet 9, which helps to ensure the stability of the inlet 9 pressure and make the inlet 9 pressure the set value. When the inlet 9 pressure is the set value, the valve core 5 collects the outlet 10 pressure when the valve core 5 is in different positions under the conditions of no wear and different wear.

[0050] The wear measurement mechanism collects different wear amounts of valve core 5. S0, S1, S2, S3, S4... Si (i is a natural number) represent different wear amounts, where S0 represents the wear amount in the case of no wear, that is, S0 is 0, and S1, S2, S3, S4... Si are all greater than 0.

[0051] Position sensor 6 collects the displacement of the upper end of valve stem 3, that is, the displacement of valve stem 3 relative to the initial position. The initial position is the position of the upper end of valve stem 3 when valve core 5 closes valve seat 4, that is, the minimum distance between the lower end face of valve core 5 and the lower end face of valve seat 4. The distance between the lower end face of valve core 5 and the lower end face of valve seat 4 can be expressed as the opening degree of valve core 5. That is, position sensor 6 collects different opening degrees of valve core 5, and uses L1, L2, L3, L4... Lj (j is a positive integer) to represent different opening degrees of valve core 5 respectively. L1, L2, L3, L4... Lj are all greater than 0. Pij represents the wear amount of valve core 5 as Si and the outlet pressure of valve core 5 when the opening degree is Lj. The outlet pressure of 10 is collected by the second pressure sensor 15.

[0052] When the pressure at inlet 9 is the set value and Si=S0=0, the valve core 5 opening Lj collected by position sensor 6 and the corresponding outlet 10 pressure P0j collected by the second pressure sensor 15 establish the first database. When the inlet pressure 9 is the set value and Si > 0, the valve core 5 opening Lj collected by the position sensor 6, the wear amount Si of the valve core 5 collected by the wear measurement mechanism, and the outlet pressure Pij (i, j are both greater than 0) collected by the second pressure sensor 15 when Si and Lj correspond to each other, establish a second database.

[0053] When the inlet 9 pressure of valve body 1 reaches the set value, for flexible control, an input module consisting of a known mobile module and a controller can be added. The mobile module and the controller are communicatively connected, and the controller is connected to the control module 7. The mobile module is a known computer or mobile phone, and the controller is a known UC521 electric valve controller. The required flow rate is input on the mobile phone or computer, and the controller converts the flow rate into outlet 10 pressure and sends it to the control module 7. The control module 7 compares this outlet 10 pressure with the outlet 10 pressure of valve core 5 in the first database under unworn conditions to obtain the first height position of valve core 5 corresponding to the outlet 10 pressure, which is equivalent to the... The control module 7 causes the drive mechanism 2 to move the valve core 5 to the first height position, corresponding to the pressure at outlet 10. During the movement of the valve core 5, the right end of the wear-resistant plate 27 is always in contact with the conical sealing surface 20. If the conical sealing surface 20 is not worn, that is, when the wear of the conical sealing surface 20 is 0, the valve core 5 moves to the first height position. At this time, the flow rate at outlet 10 corresponding to the pressure at outlet 10 is the flow rate input on the mobile phone or computer. In this way, when the valve core 5 is not worn, the control module 7 causes the drive mechanism 2 to work and move the valve core 5 to the corresponding height according to the required flow rate, so as to meet the flow rate regulation when the valve core 5 is not worn.

[0054] If the conical sealing surface 20 is worn, the wear-resistant plate 27 will swing to the right under the action of the elastic reset member 18, and the amount of the detection end of the displacement sensor 19 extending out is the amount of wear on the conical sealing surface 20.

[0055] The control module 7 compares the outlet pressure of 10 with the outlet pressure of valve core 5 in the second database at the wear level to obtain the second height position of valve core 5 corresponding to the outlet pressure of 10. This is equivalent to correcting the height position of valve core 5. The control module 7 causes the drive mechanism 2 to move valve core 5 to the second height position. At this time, the outlet flow rate corresponding to the outlet pressure of 10 is the flow rate on the machine or computer. In this way, when valve core 5 is worn, the control module 7 causes the drive mechanism 2 to work and move valve core 5 to the corresponding height according to the required flow rate, so as to meet the flow rate regulation when valve core 5 is worn.

[0056] In a specific embodiment, the control module 7 first compares the required outlet 10 pressure with the outlet 10 pressure in the sample library to obtain P04 when the required outlet 10 pressure is the same as the outlet 10 pressure in the first database. Then, it finds the valve core 5 opening L4 corresponding to P04 in the first database. Next, the control module 7 causes the drive mechanism 2 to work, and the valve core 5 moves to the position corresponding to the valve core 5 opening L4. During the movement, the wear measurement mechanism collects the actual wear amount of the valve core 5 and compares the actual wear amount with the wear amount Si of the valve core 5 in the second database. It finds S2 when the wear amount in the second database is the same as the actual wear amount. Then, it finds Pij when the required outlet 10 pressure is the same as the outlet 10 pressure in the sample library, such as P26. Then, it finds the valve core 5 opening L6 based on S2 and P26. Finally, the drive mechanism 2 works to move the valve core 5 to the valve core 5 position corresponding to the valve core 5 opening L6.

[0057] In January 2024, three field tests were conducted in the Sulige Development Zone oilfield, with a test period of three months. During the tests, wear was observed on the valve core 5 of the electric valve in one well. In the first month of testing, the wear of valve core 5 was detected by real-time measurement, and the position of valve core 5 was automatically adjusted to ensure the sealing performance and adjustment accuracy of the electric valve. In the third month of testing, the wear on the conical sealing surface 20 of valve core 5 exceeded 2.0 mm, indicating that the wear of valve core 5 exceeded the safety threshold. It was replaced immediately, ensuring safe production of the gas well in the field.

[0058] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A smart device for measuring and controlling wear of the valve core of a gas well electric valve, characterized in that... The system includes a valve body, a drive mechanism, a valve stem, a valve seat, a valve core, a wear measurement mechanism, a position sensor, and a control module. The valve body has a closed valve cavity in the center. An inlet is located at the left end of the valve body, with its right end communicating with the lower left side of the valve cavity. An outlet is located at the right end of the valve body, with its left end communicating with the upper right side of the valve cavity. A hollow valve seat is fixed to the inner wall of the valve cavity between the inlet and outlet. A sealing channel is located at the upper end of the valve body corresponding to the valve seat, with its lower end communicating with the upper part of the valve cavity. A valve cover is fixedly installed at the upper end of the valve body. A valve stem, with its lower end located inside the upper inner side of the valve cavity, is rotatably mounted within the valve cover. A valve core is fixedly installed at the lower end of the valve stem. A drive mechanism is fixedly installed on the upper side of the valve cover. The output shaft of the drive mechanism is driven and mounted together with the upper end of the valve stem. When the output shaft of the drive mechanism rotates, it can cause the valve core to move downward to close the valve seat or move upward to open the valve seat. The upper end of the valve seat is provided with a wear measuring mechanism that can detect the wear of the valve core. The left side of the valve body is provided with a first pressure sensor that can detect the inlet pressure. The right side of the valve body is provided with a second pressure sensor that can detect the outlet pressure. The upper part of the valve cover is provided with a position sensor that can detect the displacement of the upper end of the valve stem. The first pressure sensor, the second pressure sensor, the position sensor, and the wear measuring mechanism are all connected to the control module. The control module is connected to the drive mechanism.

2. The intelligent monitoring and control device for wear of gas well electric valve core as described in claim 1, characterized in that... The wear measurement mechanism includes a housing, a rotating plate, an elastic reset element, and a displacement sensor. The lower outer side of the valve core has a tapered sealing surface that is wider at the top and narrower at the bottom. The inner wall of the valve seat is tapered to match the tapered sealing surface. A mounting groove with an opening to the right is provided on the left inner wall of the valve cavity corresponding to the upper position of the valve seat. The housing is fixedly installed in the mounting groove. A measuring hole with internal and external communication is provided on the right side of the housing. A rotating plate with a right-side seal passing through the measuring hole is rotatably installed on the inner side of the right side of the housing. An elastic reset element is installed between the left side of the rotating plate and the inner side of the housing. The elastic reset element allows the right side of the rotating plate to abut against the outer left side of the valve core. A displacement sensor is installed on the inner lower part of the housing corresponding to the position below the elastic reset element. The detection end of the displacement sensor is in contact with the left side of the rotating rod. The displacement sensor can detect the wear amount of the tapered sealing surface of the valve core. The displacement sensor is connected to the control module.

3. The intelligent monitoring and control device for wear of the gas well electric valve core according to claim 2, characterized in that... The wear measurement mechanism also includes a rotating pin, a sliding rod, and a limiting block. The rotating plate is fan-shaped, and the upper front side of the rotating plate has a through-hole. The rotating pin is fixedly installed in the fixing hole. The front and rear ends of the rotating pin are rotatably installed together with the inner right side of the outer shell. The left side of the rotating plate has an arc-shaped guide hole coaxial with the rotating pin. The sliding rod is fitted in the guide hole. The upper left end of the sliding rod is fixedly installed together with the inner upper part of the outer shell. The elastic reset component is fitted on the outer side of the sliding rod between the inner side of the outer shell and the left side of the rotating plate. The limiting block is fixedly installed on the lower left side of the rotating plate. The baffle plate with its left side abutting against the right side of the limiting block is fixedly installed on the inner right side of the outer shell at the position below the rotating plate.

4. The intelligent monitoring and control device for wear of gas well electric valve core as described in claim 3, characterized in that... The thickness of the rotating plate gradually decreases from top to bottom. An arc-shaped wear-resistant plate is fixed to the lower right side of the rotating plate. The cross-section of the wear-resistant plate is an arc shape with an opening to the left.

5. The intelligent monitoring and control device for wear of gas well electric valve core according to claim 1, 2, 3, or 4, characterized in that... A circular support plate is fixedly installed on the lower side of the valve cover and fitted onto the outside of the valve stem. Several arc-shaped support blocks with inward openings are evenly distributed along the circumference at the lower end of the support plate, and the inner side of each support block is in contact with the outer side of the valve core.

6. The intelligent monitoring and control device for wear of gas well electric valve core according to claim 1, 2, 3, or 4, characterized in that... The valve cover has a through mounting hole in the center. A connecting sleeve is fixedly installed on the upper end of the valve cover corresponding to the mounting hole. The upper end of the valve stem passes through the mounting hole and is fitted into the connecting sleeve. A sealing packing is provided between the inner wall of the mounting hole and the outer side of the valve stem. An adjusting nut screwed to the upper outer side of the valve stem is fixedly installed in the connecting sleeve above the sealing packing. A mounting shell is fixedly installed on the upper end of the connecting sleeve. A left guide rod and a right guide rod are fixedly installed at intervals on the left and right sides inside the mounting shell. The left and right parts of the sliding seat are respectively fitted onto the outer side of the left guide rod and the outer side of the right guide rod. The drive mechanism is fixedly installed on the upper side of the sliding seat. The lower end of the output shaft of the drive mechanism is driven together with the upper end of the valve stem. The right side of the sliding seat is installed together with the detection end of the position sensor.

7. The intelligent monitoring and control device for wear of gas well electric valve core as described in claim 5, characterized in that... The valve cover has a through mounting hole in the center. A connecting sleeve is fixedly installed on the upper end of the valve cover corresponding to the mounting hole. The upper end of the valve stem passes through the mounting hole and is fitted into the connecting sleeve. A sealing packing is provided between the inner wall of the mounting hole and the outer side of the valve stem. An adjusting nut screwed to the upper outer side of the valve stem is fixedly installed in the connecting sleeve above the sealing packing. A mounting shell is fixedly installed on the upper end of the connecting sleeve. A left guide rod and a right guide rod are fixedly installed at intervals on the left and right sides inside the mounting shell. The left and right parts of the sliding seat are respectively fitted onto the outer side of the left guide rod and the outer side of the right guide rod. The drive mechanism is fixedly installed on the upper side of the sliding seat. The lower end of the output shaft of the drive mechanism is driven together with the upper end of the valve stem. The right side of the sliding seat is installed together with the detection end of the position sensor.

8. A control method for a gas well electric valve core wear intelligent monitoring and control device according to any one of claims 1 to 7, characterized in that... include: S1, collect sample data, including: When the inlet pressure is a set value and the wear of the valve core is 0, the outlet pressure corresponding to the valve core at multiple height positions in the valve cavity is collected, and a first database is established. When the inlet pressure is a set value and the wear of the valve core is greater than 0, the outlet pressure corresponding to the valve core at multiple height positions in the valve cavity is collected, and a second database is established. S2, obtain the required outlet pressure, compare the required outlet pressure with the first database, and obtain the first height position when the valve core is not worn; S3, the drive mechanism works and causes the valve core to move to the first height position; S4, during the process of the valve core moving to the first height position, the actual wear of the valve core is collected; If the actual wear is 0, the valve core moves to the first height position; If the actual wear is greater than 0, the required outlet pressure and the actual wear are compared with the second database to obtain the second height position corresponding to the actual wear of the valve core; the valve core is then moved to the second height position.

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