A high sealing control valve and control method

Abstract

The present invention discloses a high-sealing control valve and a control method, which specifically relates to the technical field of control valves, including a guide rod A, a guide rod B, a support rod A, a support rod B, a valve A, a valve plug A, and a valve plug B, wherein the bottom end of the valve A is fixedly connected to the bottom of the valve plug A, and the valve A is rotated to control the valve plug A to move independently on the guide rod A and the guide rod B; similarly, the valve B is arranged at the bottom of the control valve body, and the bottom end of the valve B is fixedly connected to the bottom of the valve plug B, and the valve B is rotated to control the valve plug B to move independently on the guide rod A and the guide rod B; by collecting the moving distance deviation coefficient, the supporting force deviation coefficient and the intake pressure coefficient, an adjustment accuracy influence coefficient is established and calculated; the adjustment accuracy influence coefficient is compared with a preset adjustment accuracy influence coefficient threshold value to determine whether the control valve body issues an alarm, and whether to control the moving distance of the valve plug A and the valve plug B again according to the comparison result until the effect required by the worker is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of control valves, and more specifically, to a high-sealing control valve and a control method thereof. Background Art

[0002] A high-tightness control valve is a device used to control the flow of fluids under high pressure. These valves are usually designed to handle high-pressure gas or liquid fluids to ensure accurate flow control and pressure management.

[0003] Widely used in industrial automation, oil and gas industry, chemical industry, energy industry, water treatment and sewage treatment, automobile manufacturing, manufacturing, steel industry, aerospace and other fields, high-density control valves have important applications in various industrial and scientific fields. They ensure the safe, precise and controllable flow of fluids under high-pressure environments.

[0004] In order to make the sealing effect of the control valve stable and prevent material deposition inside the control valve, it is necessary to change the valve plug of the control valve to ensure that the material deposition is not likely to occur while ensuring the sealing inside the control valve.

[0005] like Figure 4 As shown, the prior art method for sealing the control valve and preventing material deposition is: by driving the valve stem 111, the first valve plug 112 and the second valve plug 113 move up and down on the surfaces of the first guide rod 114 and the second guide rod 115 respectively, and when they reach the valve seat together, a sealing effect is achieved, and at the same time, the first stirring blade 116 and the second stirring blade 117 rotate and stir to avoid blockage due to material deposition in the control valve. In this way, while ensuring the high tightness of the control valve, it can also ensure that material deposition is not likely to occur inside the control valve.

[0006] The prior art has the following deficiencies:

[0007] The first valve plug 112 and the second valve plug 113 in the existing control valve only move up and down on the surface of the first guide rod 114 and the second guide rod 115, and when the two touch the valve seat 118, the sealing effect is achieved. However, there is no supporting structure for the stability of the first valve plug 112 and the second valve plug 113 when they reach the valve seat 118, and they are only supported by the first guide rod 114 and the second guide rod 115. In particular, if the second valve plug 113 is accidentally damaged and cannot bear the weight of the second valve plug 113, the second valve plug 113 will fall to the bottom of the control valve due to the influence of gravity, which may reduce the sealing performance of the control valve. In addition, when the control valve is sealed, it is sealed by the first valve plug 112 and the second valve plug 113, which can withstand the pressure impact of the air inlet. However, if only one valve plug is sealed, the valve plug is continuously impacted when the pressure of the air inlet remains unchanged. For a long time, the sealing performance of the control valve may be completely destroyed, and the sealing effect cannot be achieved.

[0008] After the valve plug is opened, the two existing valve plugs are controlled by a valve stem 111, so that the two valve plugs are simultaneously away from or close to the valve seat 118, resulting in that when the valve is opened, the air intake speed is usually completely consistent with the air outlet speed, and the independence and diversity of the control valve function are poor.

[0009] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0010] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a high-sealing control valve and a control method to solve the problems raised in the above-mentioned background technology.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A high-sealing control valve comprises a control valve body, a guide rod A, a guide rod B, a support rod A, a support rod B, a valve A, a valve B, a valve plug A, a valve plug B, a support force information collection module, a moving distance information collection module, a pressure information collection module, and a controller.

[0013] The valve A rotates to control the valve plug A to move independently on the guide rod A and the guide rod B;

[0014] The valve B rotates to control the valve plug B to move independently on the guide rod A and the guide rod B;

[0015] Support force information collection module: used to collect the actual pulling force of support rod A to support valve plug A to maintain stability and the support force of support rod B to support valve plug B to maintain stability;

[0016] Moving distance information collection module: used to collect the actual moving distance of valve plug A and valve plug B on guide rod A and guide rod B;

[0017] Pressure information acquisition module: used to collect the actual pressure of the air inlet;

[0018] After analyzing the output signals of the support force information acquisition module, the moving distance information acquisition module, and the pressure information acquisition module, the controller determines whether the moving distance of valve plug A and valve plug B is accurate. If the moving distance of valve plug A and valve plug B is inaccurate, the controller sends out an alarm signal and controls valve A and valve B to rotate again to change the moving distance of valve plug A and valve plug B until the controller no longer sends out an alarm signal.

[0019] In a preferred embodiment, a flow channel is provided inside the control valve body, and the valve seat is fixedly installed in the flow channel to separate the flow channel into an air inlet and an air outlet, the valve plug A and the guide rod A are arranged on the side close to the air inlet, the valve plug B and the guide rod B are arranged on the side close to the air outlet, and a plurality of support rods A are arranged at the bottom of the valve plug A; the valve A is arranged outside the control valve body, and the bottom end of the valve A is fixedly connected to the bottom of the valve plug A, the valve B is arranged at the bottom of the control valve body, and the bottom end of the valve B is fixedly connected to the bottom of the valve plug B; a plurality of support rods B are arranged at the bottom of the valve plug B, and the tops of the support rods A and support rods B are respectively provided with supporting force information acquisition modules, a controller is arranged on the surface of the valve plug A, a moving distance information acquisition module is arranged on the top of the valve plug A, and a pressure information acquisition module is arranged at the air inlet of the air inlet.

[0020] In a preferred embodiment,

[0021] A high-seal control valve control method comprises the following steps:

[0022] S1. Collect the operating status information of the control valve during operation, including its own parameter information and external environment information;

[0023] The parameter information includes the moving distance deviation coefficient and the supporting force deviation coefficient, and the moving distance deviation coefficient and the supporting force deviation coefficient are marked as and The external environment information includes the intake pressure coefficient, and the intake pressure coefficient is marked as ;

[0024] S2, transmitting the moving distance deviation coefficient, the supporting force deviation coefficient, and the intake pressure coefficient to the controller for comprehensive analysis, and establishing and calculating the adjustment accuracy influence coefficient;

[0025] S3. Analyze the calculated adjustment accuracy influence coefficient, compare the adjustment accuracy influence coefficient with the preset adjustment accuracy influence coefficient threshold, determine whether the controller body issues an alarm, and choose whether to control the movement distance of valve plug A and valve plug B again based on the comparison result.

[0026] In a preferred embodiment, the acquisition logic of the moving distance deviation coefficient is:

[0027] S1. Obtain the actual moving distance of valve plug A on guide rod A and guide rod B and the corresponding preset moving distance, and mark them as and , and calculate the first moving deviation coefficient, the calculation formula is: , where is the first moving deviation coefficient;

[0028] S2. Obtain the actual moving distance of the valve plug B on the guide rod A and the guide rod B and the corresponding preset moving distance, and mark them as and , and calculate the second moving deviation coefficient, the calculation formula is: , where is the second moving deviation coefficient;

[0029] S3. Calculate the moving distance deviation coefficient, the expression is: , where is the moving distance deviation coefficient.

[0030] In a preferred embodiment, the logic for obtaining the support force deviation coefficient is:

[0031] S1. Obtain the range of the tension that the support rod A supports the valve plug A to maintain stability, and mark the range as ,and ; Obtain the actual pulling force of the support rod A to support the valve plug A to maintain stability, and mark it as , and calculate the first support force deviation coefficient, if Greater than , the calculation formula is: ,like Less than , the calculation formula is: , where is the first support force deviation coefficient;

[0032] S2. Obtain the range of the supporting force of the support rod B to maintain a stable support force for the valve plug B, and mark the range as ,and ; Obtain the actual pulling force of the support rod B to support the valve plug B to maintain stability, and mark it as , and calculate the second support force deviation coefficient, if Greater than , the calculation formula is: ,like Less than , the calculation formula is: , where is the second support force deviation coefficient;

[0033] S3. Calculate the support force deviation coefficient, the expression is: , where is the support force deviation coefficient.

[0034] In a preferred embodiment, the acquisition logic of the intake pressure coefficient is:

[0035] Obtain the actual pressure of the air inlet before adjustment and the pre-designed air inlet pressure, and calculate the air inlet pressure coefficient. The expression is: ; In the formula, is the intake pressure coefficient, is the actual pressure at the air inlet, is the pre-designed air inlet pressure.

[0036] In a preferred embodiment, the step of obtaining the adjustment accuracy influence coefficient is:

[0037] The obtained moving distance deviation coefficient and support force deviation coefficient The coefficient of intake pressure Carry out comprehensive processing, establish a processing model, and generate the adjustment accuracy influence coefficient , the expression is:

[0038] ;

[0039] In the formula, The moving distance deviation coefficient and support force deviation coefficient , Intake pressure coefficient The preset scaling factor of Both are greater than 0.

[0040] Technical effects and advantages of the present invention:

[0041] 1. The present invention is provided with a guide rod A, a guide rod B, a support rod A, a support rod B, a valve A, a valve plug A, and a valve plug B. The bottom end of the valve A is fixedly connected to the bottom of the valve plug A, and the valve A is rotated to control the valve plug A to move independently on the guide rod A and the guide rod B. Similarly, the valve B is arranged at the bottom of the control valve body, and the bottom end of the valve B is fixedly connected to the bottom of the valve plug B. The valve B is rotated to control the valve plug B to move independently on the guide rod A and the guide rod B.

[0042] 2. In the present invention, the support rod A and the support rod B move up and down with the valve plug A and the valve plug B. When the valve plug A and the valve plug B stop moving, the support rod A and the support rod B respectively support the valve plug A and the valve plug B to keep them stable and prevent them from falling suddenly. At the same time, when the valve plug A and the valve plug B cooperate with each other to close the control valve, the support rod B can provide a supporting force to the valve plug B, so that the control valve has a better sealing effect and a higher sealing performance;

[0043] 3. The present invention establishes and calculates the adjustment accuracy influence coefficient by collecting the moving distance deviation coefficient, the supporting force deviation coefficient and the intake pressure coefficient; and analyzes the calculated adjustment accuracy influence coefficient, compares the adjustment accuracy influence coefficient with a preset adjustment accuracy influence coefficient threshold, determines whether the control valve body issues an alarm, and chooses whether to control the moving distance of the valve plug A and the valve plug B again according to the comparison result, until the effect required by the workers is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0045] Figure 1 This is a structural schematic diagram of a high-sealing control valve proposed by the present invention;

[0046] Figure 2 This is a schematic diagram of the effect of valve plug A and valve plug B closing the control valve;

[0047] Figure 3 This is a schematic diagram of the effect of valve plug A and valve plug B operating independently;

[0048] Figure 4 A schematic diagram of the operation of the existing control valve;

[0049] Figure 5 The present invention provides a method flow chart of a high-sealing control valve control method.

[0050] In the figure: 1. control valve body; 2. valve A; 3. valve plug A; 4. support rod A; 5. support force information acquisition module; 6. guide rod A; 7. guide rod B; 8. valve B; 9. support rod B; 10. moving distance information acquisition module; 11. controller; 12. pressure information acquisition module; 13. valve plug B; 111. valve stem; 112. first valve plug; 113. second valve plug; 114. first guide rod; 115. second guide rod; 116. first stirring blade; 117. second stirring blade; 118. valve seat. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Example 1

[0053] like Figure 1-Figure 5 As shown, a high-sealing control valve includes a control valve body 1, a guide rod A6, a guide rod B7, a support rod A4, a support rod B9, a valve A2, a valve plug A3, a valve plug B13, a support force information acquisition module 5, a moving distance information acquisition module 10, a pressure information acquisition module 12, and a controller 11. A flow channel is provided inside the control valve body 1, and a valve seat is fixedly installed in the flow channel to separate the flow channel into an air inlet and an air outlet. A valve plug A3 for blocking the air inlet is provided on the side close to the air inlet, and a valve plug B13 for blocking the air outlet is provided on the side close to the air outlet. The guide rod A6 is located on the side close to the air inlet, and the guide rod B7 is located on the side close to the air outlet, a plurality of support rods A4 are arranged at the bottom of the valve plug A3, and a plurality of support rods B9 are arranged at the bottom of the valve plug B13, and the support rods A4 and B9 support the valve plug A3 and the valve plug B13 to maintain stability; the valve A2 is arranged outside the control valve body 1, and the bottom end of the valve A2 is fixedly connected to the bottom of the valve plug A3, and is used to control the valve plug A3 to move independently on the guide rod A6 and the guide rod B7; the valve B8 is arranged at the bottom of the control valve body 1, and the bottom end of the valve B8 is fixedly connected to the bottom of the valve plug B13, and is used to control the valve plug B13 to move independently on the guide rod A6 and the guide rod B7;

[0054] The working principle of the present invention is:

[0055] Turn valve A2 clockwise, and valve plug A3 moves downward along guide rod A6 and guide rod B7. Turn valve A2 counterclockwise, and valve plug A3 moves upward along guide rod A6 and guide rod B7. Similarly, turn valve B8 clockwise, and valve plug B13 moves upward along guide rod A6 and guide rod B7. Turn valve B8 counterclockwise, and valve plug B13 moves downward along guide rod A6 and guide rod B7. By rotating valve A2, the distance between valve plug A3 and valve seat is controlled. By rotating valve B8, the distance between valve plug B13 and valve seat is controlled. Valve plug A3 and valve plug B13 can move independently.

[0056] At the same time, the support rod A4 and the support rod B9 move up and down with the valve plug A3 and the valve plug B13. When the valve plug A3 and the valve plug B13 stop moving, the support rod A4 and the support rod B9 respectively support the valve plug A3 and the valve plug B13 to keep them stable and prevent them from falling suddenly. When the valve plug A3 and the valve plug B13 cooperate with each other to close the control valve, the support rod B9 can provide supporting force to the valve plug B13, so that the control valve has a better sealing effect and higher sealing performance.

[0057] Example 2

[0058] As described in Example 1, the valve A2 is rotated clockwise, and the valve plug A3 moves downward along the guide rod A6 and the guide rod B7. The valve A2 is rotated counterclockwise, and the valve plug A3 moves upward along the guide rod A6 and the guide rod B7. Similarly, the valve B8 is rotated clockwise, and the valve plug B13 moves upward along the guide rod A6 and the guide rod B7. The valve B8 is rotated counterclockwise, and the valve plug B13 moves downward along the guide rod A6 and the guide rod B7. By rotating the valve A2, the distance between the valve plug A3 and the valve seat is controlled. By rotating the valve B8, the distance between the valve plug B13 and the valve seat is controlled, and finally different air intake speeds and air outlet speeds are achieved.

[0059] However, if there is a problem with the adjustment accuracy of the control valve during the adjustment process and it is not discovered in time, it may affect the air intake speed and the air outlet speed, resulting in failure to achieve the pre-designed effect. Therefore, it is necessary to evaluate the adjustment accuracy of the control valve to determine whether there is a problem with the adjustment accuracy of the control valve.

[0060] The specific steps include:

[0061] A high-seal control valve control method comprises the following steps:

[0062] S1. Collect the operating status information of the control valve during operation, including its own parameter information and external environment information;

[0063] The parameter information includes the moving distance deviation coefficient and the supporting force deviation coefficient, and the moving distance deviation coefficient and the supporting force deviation coefficient are marked as and The external environment information includes the intake pressure coefficient, and the intake pressure coefficient is marked as ;

[0064] S2, transmitting the moving distance deviation coefficient, the supporting force deviation coefficient, and the intake pressure coefficient to the controller 11 for comprehensive analysis, and establishing and calculating the adjustment accuracy influence coefficient;

[0065] S3. Analyze the calculated adjustment accuracy influence coefficient, compare the adjustment accuracy influence coefficient with the preset adjustment accuracy influence coefficient threshold, determine whether the controller 11 body issues an alarm, and choose whether to control the movement distance of the valve plug A3 and the valve plug B13 again based on the comparison result.

[0066] The specific implementation steps are as follows:

[0067] Movement distance deviation coefficient: refers to the difference between the distance moved by the valve plug A3 on the guide rod A6 and the guide rod B7 and the corresponding preset movement distance, and the difference between the distance moved by the valve plug B13 on the guide rod A6 and the guide rod B7 and the corresponding preset movement distance; because the valve plug A3 and the valve plug B13 operate independently, when adjustment is required, the valve plug A3 is moved back and forth on the guide rod A6 and the guide rod B7, and stops at a suitable distance. At this time, the distance moved by the valve plug A3 on the guide rod A6 and the guide rod B7 is the actual movement distance of the valve plug A3. Similarly, the valve plug B13 moves back and forth on the guide rod A6 and the guide rod B7, and stops at a suitable distance. At this time, the distance moved by the valve plug B13 on the guide rod A6 and the guide rod B7 is the actual movement distance of the valve plug B13. These two movement distances have a corresponding preset movement distance. If the difference between the actual movement distance and the preset movement distance is too large, it may cause the following effects on the adjustment accuracy of the air inlet speed and the air outlet speed of the control valve:

[0068] Reduced control accuracy: If the actual travel distance of the valve plug is significantly different from the preset travel distance, the accuracy of the control valve will be affected. This may lead to inaccurate flow control and failure to meet process requirements.

[0069] Flow instability: Due to the mismatch between the position of the valve plug and the ideal position, flow instability may occur when the fluid flows through the control valve, which may lead to process instability and quality problems.

[0070] Energy efficiency issues: Inaccurate flow control can result in wasted energy because the process may require additional energy to compensate for poor control.

[0071] Pressure shock problem: If the actual moving distance deviates too much, it may cause fluid pressure shock, causing unnecessary pressure fluctuations on the control valve and related piping system, which may affect the life and stability of the system.

[0072] Process inconsistency: Inconsistent performance of control valves under different operating conditions may lead to process instability and product quality issues. This is particularly important for processes that require precise control.

[0073] Therefore, it is very important to ensure that the actual moving distance of the valve plug A3 and the valve plug B13 on the guide rod A6 and the guide rod B7 is consistent with the preset moving distance.

[0074] The logic for obtaining the moving distance deviation coefficient is:

[0075] S1. Obtain the actual moving distance of the valve plug A3 on the guide rod A6 and the guide rod B7 and the corresponding preset moving distance, and mark them as and , and calculate the first moving deviation coefficient, the calculation formula is: , where is the first moving deviation coefficient;

[0076] S2. Obtain the actual moving distance of the valve plug B13 on the guide rod A6 and the guide rod B7 and the corresponding preset moving distance, and mark them as and , and calculate the second moving deviation coefficient, the calculation formula is: , where is the second moving deviation coefficient;

[0077] S3. Calculate the moving distance deviation coefficient, the expression is: , where is the moving distance deviation coefficient.

[0078] It should be noted that the actual moving distance of the valve plug A3 and the valve plug B13 on the guide rod A6 and the guide rod B7 can be obtained through the moving distance information acquisition module 10. The moving distance information acquisition module 10 includes ultrasonic sensors, displacement sensors, encoders, etc., wherein the principle of ultrasonic sensor acquisition is to install the ultrasonic sensor on the valve plug A3 and the valve plug B13. When the valve plug A3 and the valve plug B13 move, the ultrasonic sensor measures the moving distance of the valve plug A3 and the valve plug B13 by transmitting and receiving ultrasonic signals. It should also be noted that the valve plug A3 and the valve plug B13 are respectively installed with a moving distance information acquisition module 10; the preset moving distance corresponding to the actual moving distance of the valve plug A3 and the valve plug B13 on the guide rod A6 and the guide rod B7 can be obtained through the previous work log of the control valve body 1.

[0079] It can be seen from the calculated expression that the larger the moving distance deviation coefficient, the lower the accuracy of adjusting the intake speed and the outlet speed of the control valve body 1 during use, and the larger the adjustment accuracy influence coefficient; the smaller the moving distance deviation coefficient, the higher the accuracy of adjusting the intake speed and the outlet speed of the control valve body 1 during use, and the smaller the adjustment accuracy influence coefficient.

[0080] Support force deviation coefficient: refers to the difference between the force of support rod A4 to support valve plug A3 to maintain stability and the corresponding preset force of support rod A4 to support valve plug A3 to maintain stability, and the difference between the force of support rod B9 to support valve plug B13 to maintain stability and the corresponding preset force of support rod B9 to support valve plug B13 to maintain stability after valve plug A3 and valve plug B13 move on guide rod A6 and guide rod B7; when the distance of valve plug A3 moving on guide rod A6 and guide rod B7 is adjusted, in order to ensure that valve plug A3 does not suddenly drop and contact with valve seat, support rod A4 is required to support valve plug A3 so that it has an upward pulling force; similarly, when the distance of valve plug B13 moving on guide rod A6 and guide rod B7 is adjusted, in order to ensure that valve plug B13 does not suddenly drop and contact with the bottom of control valve, support rod B9 is required to support valve plug B13 so that it has an upward supporting force; if the actual pulling force and supporting force are different from the pre-designed pulling force and supporting force, there may be adverse effects:

[0081] Decreased stability of the control valve: If the support force provided by the support rod is significantly different from the force required by the design, the valve plug may become unstable, resulting in an undesirable drop or sudden movement during the control process. This may cause a decrease in the stability of the control valve and affect the accuracy of flow control.

[0082] Reduced control flexibility: A large support force deviation coefficient may make the next adjustment more difficult because additional force is required to adjust the position of the valve plug, which reduces the control flexibility.

[0083] Reduced predictability: If the support force is unstable, it is difficult to accurately predict the position of the valve plug, which can have a negative impact on process control, especially in applications that require a high degree of controllability, such as chemical or laboratory applications.

[0084] Energy efficiency issues: Unstable support forces may result in additional energy consumption because the control valve requires more energy to keep the valve plug in the desired position.

[0085] Therefore, it is very important to ensure that the force used by the support rod A4 and the support rod B9 to support the valve plug A3 and the valve plug B13 to maintain a stable state is consistent with the force used by the corresponding preset support rod A4 to support the valve plug A3 to maintain a stable state.

[0086] The logic for obtaining the support force deviation coefficient is:

[0087] S1. Obtain the range of the tension that the support rod A4 supports the valve plug A3 to maintain stability, and mark the range as ,and ; Obtain the actual pulling force of the support rod A4 to support the valve plug A3 to maintain stability, and mark it as , and calculate the first support force deviation coefficient, if Greater than , the calculation formula is: ,like Less than , the calculation formula is: , where is the first support force deviation coefficient;

[0088] S2, obtain the range of the supporting force of the support rod B9 to support the valve plug B13 to maintain stability, and mark the range as ,and ; Obtain the actual pulling force of the support rod B9 to support the valve plug B13 to maintain stability, and mark it as , and calculate the second support force deviation coefficient, if Greater than , the calculation formula is: ,like Less than , the calculation formula is: , where is the second support force deviation coefficient;

[0089] S3. Calculate the support force deviation coefficient, the expression is: , where is the support force deviation coefficient.

[0090] It should be noted that the support rod A4 supports the valve plug A3 to maintain a stable actual pulling force. The support rod B9 supports the valve plug B13 to maintain a stable support force All of them can be obtained through the support force information acquisition module 5, which includes a pressure sensor, an air pressure sensor, a hydraulic pressure sensor, a pressure gauge, etc. The principle of the pressure sensor acquisition is that the pressure sensor is installed on the top of the support rod. When the valve plug A3 and the valve plug B13 no longer move, the pressure sensor converts the collected data into an electrical signal, and the pressure value is obtained by processing; the support rod A4 supports the valve plug A3 to maintain a stable tension range It refers to the range of pulling force corresponding to the position when the valve plug A3 stops moving. The range of supporting force for the support rod B9 to support the valve plug B13 to maintain stability refers to the range of supporting force corresponding to the position when the valve plug B13 stops moving. These data can be obtained through the previous work log of the control valve.

[0091] It can be seen from the calculated expression that the larger the support force deviation coefficient is, the lower the accuracy of adjusting the air intake speed and the air outlet speed of the control valve body 1 during use, and the larger the adjustment accuracy influence coefficient is; the smaller the support force deviation coefficient is, the higher the accuracy of adjusting the air intake speed and the air outlet speed of the control valve body 1 during use, and the smaller the adjustment accuracy influence coefficient is.

[0092] Inlet pressure coefficient: refers to the difference between the actual pressure of the air inlet and the pre-set air inlet pressure before the worker makes adjustments. Before the worker starts making adjustments, he or she will get a data, which is the current air inlet pressure. According to the air inlet pressure, the worker adjusts valve plug A3 and valve plug B13 so that the air outlet speed reaches the standard that the worker needs to adjust. If there is a difference between the actual pressure of the air inlet and the pre-set air inlet pressure before the worker makes adjustments, it may cause the worker to make an incorrect judgment, resulting in problems with the adjustment accuracy.

[0093] The logic for obtaining the intake pressure coefficient is:

[0094] Obtain the actual pressure of the air inlet before adjustment and the pre-designed air inlet pressure, and calculate the air inlet pressure coefficient. The expression is: ; In the formula, is the intake pressure coefficient, is the actual pressure at the air inlet, is the pre-designed air inlet pressure.

[0095] It should be noted that the actual pressure of the air inlet can be obtained through the pressure information acquisition module 12.

[0096] The pre-set inlet pressure can be obtained from the control valve's operating log.

[0097] From the calculated expression, it can be seen that the larger the intake pressure coefficient is, the lower the accuracy of adjusting the intake speed and the outlet speed of the control valve body 1 during use, and the larger the influence coefficient of the adjustment accuracy is; the smaller the intake pressure coefficient is, the higher the accuracy of adjusting the intake speed and the outlet speed of the control valve body 1 during use, and the smaller the influence coefficient of the adjustment accuracy is.

[0098] Example 3

[0099] The obtained moving distance deviation coefficient and support force deviation coefficient The coefficient of intake pressure Carry out comprehensive processing, establish a processing model, and generate the adjustment accuracy influence coefficient , the expression is:

[0100] ;

[0101] In the formula, The moving distance deviation coefficient and support force deviation coefficient , Intake pressure coefficient The preset scaling factor of All are greater than 0; The value ranges of are set between 1.21-1.35, 0.18-1.33 and 0.92-1.15 respectively;

[0102] The generated adjustment accuracy influence coefficient The pre-set adjustment accuracy influence coefficient threshold For comparison, if the adjustment accuracy affects the coefficient Less than the preset adjustment accuracy influence coefficient threshold , it proves that the control valve has no problem with the accuracy of regulating flow and no changes are needed; if the regulating accuracy influence coefficient Greater than the preset adjustment accuracy influence coefficient threshold , it proves that the control valve has a problem with the accuracy of regulating flow. At this time, the controller 11 body immediately alarms. In order to make the regulation accuracy more accurate, the moving distance of valve plug A3 and valve plug B13 is adjusted again until the adjustment accuracy influence coefficient is adjusted to If the value is less than the preset threshold of the adjustment accuracy influence coefficient, the controller 11 body will no longer issue an alarm.

[0103] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0104] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0105] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0106] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0109] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high-seal control valve control method, characterized in that: The following steps are involved: S1. Collect the operating status information of the control valve during operation, including its own parameter information and external environment information; The parameter information includes the moving distance deviation coefficient and the supporting force deviation coefficient, and the moving distance deviation coefficient and the supporting force deviation coefficient are marked as and The external environment information includes the intake pressure coefficient, and the intake pressure coefficient is marked as ; S2, transmitting the moving distance deviation coefficient, the supporting force deviation coefficient, and the intake pressure coefficient to the controller (11) for comprehensive analysis, and establishing and calculating the adjustment accuracy influence coefficient; S3, analyzing the calculated adjustment accuracy influence coefficient, comparing the adjustment accuracy influence coefficient with a preset adjustment accuracy influence coefficient threshold, determining whether the control valve body (1) issues an alarm, and selecting whether to control the movement distance of the valve plug A (3) and the valve plug B (13) again according to the comparison result; A high-sealing control valve comprises a control valve body (1), a guide rod A (6), a guide rod B (7), a support rod A (4), a support rod B (9), a valve A (2), a valve B (8), a valve plug A (3), a valve plug B (13), a support force information acquisition module (5), a moving distance information acquisition module (10), a pressure information acquisition module (12), and a controller (11); The valve A (2) rotates to control the valve plug A (3) to move independently on the guide rod A (6) and the guide rod B (7); The valve B (8) rotates to control the valve plug B (13) to move independently on the guide rod A (6) and the guide rod B (7); Support force information collection module (5): used to collect the actual pulling force of the support rod A (4) supporting the valve plug A (3) to maintain stability and the support force of the support rod B (9) supporting the valve plug B (13) to maintain stability; A moving distance information collection module (10): used to collect the actual moving distances of the valve plug A (3) and the valve plug B (13) on the guide rod A (6) and the guide rod B (7); Pressure information acquisition module (12): used to collect the actual pressure of the air inlet; After analyzing the output signals of the support force information acquisition module (5), the moving distance information acquisition module (10), and the pressure information acquisition module (12), the controller (11) determines whether the moving distance between the valve plug A (3) and the valve plug B (13) is accurate. If the moving distance between the valve plug A (3) and the valve plug B (13) is inaccurate, the controller (11) issues an alarm signal and controls the valve A (2) and the valve B (8) to rotate again, thereby changing the moving distance between the valve plug A (3) and the valve plug B (13), until the controller (11) no longer issues an alarm signal. The control valve body (1) has a flow channel inside, the valve seat is fixedly installed in the flow channel to separate the flow channel into an air inlet and an air outlet, the valve plug A (3) and the guide rod A (6) are arranged on the side close to the air inlet, the valve plug B (13) and the guide rod B (7) are arranged on the side close to the air outlet, and a plurality of support rods A (4) are arranged at the bottom of the valve plug A (3); the valve A (2) is arranged outside the control valve body (1), and the bottom end of the valve A (2) is fixedly connected to the bottom of the valve plug A (3), and the valve B (8 ) is arranged at the bottom of the control valve body (1), and the bottom end of the valve B (8) is fixedly connected to the bottom of the valve plug B (13); a plurality of support rods B (9) are arranged at the bottom of the valve plug B (13), and the tops of the support rods A (4) and the support rods B (9) are respectively provided with support force information acquisition modules (5), the surface of the valve plug A (3) is provided with a controller (11), the top of the valve plug A (3) is provided with a moving distance information acquisition module (10), and the air inlet of the air inlet is provided with a pressure information acquisition module (12).

2. A high-seal control valve control method according to claim 1, characterized in that: The acquisition logic of the moving distance deviation coefficient is: The actual moving distance of the valve plug A (3) on the guide rod A (6) and the guide rod B (7) and the corresponding preset moving distance are obtained and marked as and , and calculate the first moving deviation coefficient, the calculation formula is: , where is the first moving deviation coefficient; The actual moving distance of the valve plug B (13) on the guide rod A (6) and the guide rod B (7) and the corresponding preset moving distance are obtained and marked as and , and calculate the second moving deviation coefficient, the calculation formula is: , where is the second moving deviation coefficient; Calculate the moving distance deviation coefficient, the expression is: , where is the moving distance deviation coefficient.

3. A high-seal control valve control method according to claim 2, characterized in that: The logic for obtaining the support force deviation coefficient is: Obtain the range of tension within which the support rod A (4) supports the valve plug A (3) to maintain stability, and mark the range as ,and ; Obtain the actual pulling force of the support rod A (4) to support the valve plug A (3) to maintain stability, and mark it as , and calculate the first support force deviation coefficient, if Greater than , the calculation formula is: ,like Less than , the calculation formula is: , where is the first support force deviation coefficient; Obtain the range of the supporting force of the support rod B (9) to support the valve plug B (13) to maintain stability, and mark the range as ,and ; Obtain the actual pulling force of the support rod B (9) to support the valve plug B (13) to maintain stability, and mark it as , and calculate the second support force deviation coefficient, if Greater than , the calculation formula is: ,like Less than , the calculation formula is: , where is the second support force deviation coefficient; Calculate the support force deviation coefficient, the expression is: , where is the support force deviation coefficient.

4. A high-seal control valve control method according to claim 3, characterized in that: The acquisition logic of the intake pressure coefficient is: Obtain the actual pressure of the air inlet before adjustment and the pre-designed air inlet pressure, and calculate the air inlet pressure coefficient. The expression is: ; In the formula, is the intake pressure coefficient, is the actual pressure at the air inlet, is the pre-designed air inlet pressure.

5. A high-seal control valve control method according to claim 4, characterized in that: The steps for obtaining the adjustment accuracy influence coefficient are as follows: The obtained moving distance deviation coefficient and support force deviation coefficient The coefficient of intake pressure Carry out comprehensive processing, establish a processing model, and generate the adjustment accuracy influence coefficient , the expression is: ; In the formula, , , The moving distance deviation coefficient and support force deviation coefficient , Intake pressure coefficient The preset scaling factor of , , Both are greater than 0.

Images