Medium particle anti-blocking ball valve

Abstract

The invention discloses a medium particle anti-blocking ball valve, belongs to the technical field of ball valves, and solves the problem that solid particles carried in fluid are attached to a joint between a valve seat and a ball body, the valve seat and even the ball body due to the fact that a common ball valve is in contact with the fluid carrying the solid particles for a long time in a pipeline. Comprising a valve body, a connecting seat fixedly connected to the valve body, a valve seat fixedly connected into the valve body, a ball body rotationally connected into the valve body and capable of being attached to the valve seat, and a valve rod fixedly connected with the ball body, penetrating through the connecting seat and rotationally connected with the connecting seat. Whether the ball valve is blocked or not can be automatically judged, if blockage is determined, whether the joint of the ball body and the valve seat is blocked or not is further judged, the servo motor and the electromagnetic valve are controlled after confirmation, the problem is confirmed through two times of judgment, misjudgment is avoided, after confirmation, the electromagnetic valve is disconnected, the water hammer eliminator and a valve body inlet are blocked, and the servo motor rotates the ball body; particles on the valve seat and the ball body are cleaned through impact force of a water hammer, and blocking is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a medium particle anti-blocking ball valve. Background Art

[0002] The ball valve is a commonly used industrial valve, which is widely used in the petroleum, chemical, natural gas and other industries for its compact structure, good sealing performance and convenient operation. It is mainly composed of a valve body, a valve stem, a valve ball and a seal. The valve ball is spherical with a diameter hole on it, and the flow of the fluid is controlled by rotating the valve ball. The switching characteristics of the ball valve make it have low friction during the opening and closing process, which is suitable for the control of high-pressure and high-wear fluids. In addition, the ball valve has low fluid resistance and fast switching, which is easy to realize automatic control. Its design also allows operation in a variety of medium flow directions, including linear flow and angular flow, which makes the ball valve highly flexible and widely applicable in pipeline systems.

[0003] Ball valves face special challenges when conveying fluids containing solid particles. Due to the presence of solid particles, ball valves may suffer from erosion, wear, and clogging, especially during the opening and closing process of the valve, where solid particles may damage the valve seat and ball sealing surface.

[0004] In order to deal with this situation, a V-type ball valve is usually selected because the inner cavity of the ball is V-shaped, and the surface of the ball and the sealing surface form a V-shaped groove, which helps to guide solid particles to the downstream of the valve body and reduce wear and blockage on the valve sealing surface. Compared with ordinary ball valves, this design of the V-type ball valve reduces the accumulation of solid particles between the inner cavity of the ball and the sealing surface, reducing the risk of wear and blockage of the valve. Therefore, in an environment where there are many solid particles in the liquid, the V-type ball valve is more suitable than the ordinary ball valve, especially in the mining, metallurgy, chemical industry, sewage treatment and other industries, which often need to deal with media containing suspended particles, particles with high viscosity or large particles.

[0005] However, in actual situations, whether it is from the consideration of the cost of pipeline equipment or the consideration of whether precise flow control is needed in the pipeline, it can be found that in actual situations, even when transporting fluids with more solid particles, ordinary ball valves are often used to control the on-off of the pipeline. On the one hand, due to the manufacturing process of the V-type ball valve, its cost is obviously higher than that of ordinary ball valves. When a large number of them are required in the pipeline, the cost will increase significantly. Secondly, on the other hand, due to the fact that the transportation of fluids with more solid particles is not as precise as the preparation of chemical formulas, in this process, the ball valve only needs to play the role of on-off blocking, and there is no need to accurately control the flow rate of the fluid. Therefore, ordinary ball valves are still used in this case for on-off work.

[0006] It is precisely because of the above reasons that ordinary ball valves will be in contact with the fluid carrying solid particles for a long time in the pipeline, which will cause the joints between the valve seat and the ball, the valve seat, and even the ball to be attached by solid particles carried in the fluid, and then the valve ball will be blocked by medium particles.

[0007] Therefore, a medium particle anti-blocking ball valve is proposed to solve or alleviate the above problems. Summary of the invention

[0008] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a medium particle anti-blocking ball valve.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: A medium particle anti-blocking ball valve comprises a valve body, a connecting seat fixedly connected to the valve body, a valve seat fixedly connected to the valve body, a sphere rotatably connected to the valve body and can be arranged in a fit with the valve seat, a valve stem fixedly connected to the sphere and penetrating the connecting seat and rotatably connected, an actuator shell fixedly connected to an end of the connecting seat away from the valve body, and a servo motor fixedly connected to one side of the actuator shell, the output shaft of the servo motor and the upper end of the valve stem both extend into the actuator shell, and the output shaft of the servo motor and the upper end of the valve stem are transmission-connected, a branch pipe vertically arranged upward is connected on the outer wall of the inlet of the valve body, an electromagnetic valve is connected on the branch pipe, and a water hammer eliminator is connected at one end of the branch pipe away from the valve body, and a blockage identification system is also included, the blockage identification system is coupled to the electromagnetic valve and the servo motor, the blockage identification system is used to judge the blockage of the joint between the valve seat and the ball, control whether the water hammer eliminator is effective, and control the servo motor to cause water hammer phenomenon to flush the blockage.

[0010] Preferably, a worm is rotatably connected in the actuator housing, one end of the worm is coaxially connected to the output shaft of the servo motor, and a worm wheel connected to the worm is fixedly connected to the valve stem in the actuator housing.

[0011] Preferably, the blockage identification system includes a motor data acquisition module, an ultrasonic image acquisition module, a data processing module, and a control module. The motor data acquisition module is used to collect data from the servo motor and feed it back to the data processing module. The ultrasonic image acquisition module is used to respond to the data processing module to collect the internal image of the ball valve and feed it back to the data processing module. The data processing module is used to determine the blockage situation in the ball valve according to the data of the servo motor and control the operation of the ultrasonic image acquisition module, determine whether the joint between the valve seat and the ball is blocked according to the internal image of the ball valve, and then output a signal to the control module. The solenoid valve is electrically connected through a relay, the output end of the control module is coupled to the controlled end of the relay, and the output end of the control module is coupled to the servo motor through the motor drive module.

[0012] Preferably, the motor data acquisition module is used to collect data of the servo motor and feed it back to the data processing module, including the following steps: Collecting data of servo motor, including motor current , motor torque , and motor speed ; The motor current , motor torque , and motor speed De-noising through low-pass filtering ,in, is the time constant of the filter, is the original signal, is the signal after filtering; Normalize the denoised motor current, motor torque, and motor speed , where x is the original data, is the normalized data, and are the maximum and minimum values ​​of the data respectively; Extracting Motor Current , motor torque , and motor speed The average value reflects the central trend of the signal, and the average value of the motor current , the average value of the motor torque , the average value of the motor speed , where N is the total number of data points; According to the motor current , motor torque , and motor speed The standard deviation of the motor current is extracted from the mean value. , standard deviation of motor torque , standard deviation of motor speed ; Calculating Motor Current , motor torque , and motor speed The skewness of the motor current , the skewness of the motor torque , the skewness of the motor speed ; Calculating Motor Current , motor torque , and motor speed The peak value of the motor current , the peak value of the motor torque , the peak value of the motor speed ; The time domain signal is converted into the frequency domain signal through the fast Fourier transform, and the spectrum of the signal is calculated through FFT. ,in, is the spectrum of the signal in the frequency domain, is the time domain signal, f is the frequency; Calculate spectrum energy, band energy, frequency center, spectrum peak, and spectrum bandwidth.

[0013] Preferably, the ultrasonic image acquisition module is used to receive the internal image of the ball valve in response to the data processing module and feed it back to the data processing module, including the following steps: Receiving an output result from a data processing module indicating that a blockage exists; In response to the output result that there is a blockage, the ultrasonic image acquisition module operates and acquires an internal image of the ball valve; The internal image of the ball valve is filtered and denoised. ,in, is the original image, N is the total number of pixels in the filter area, and k is the radius of the filter window; The details and features of the internal image of the ball valve after denoising are enhanced by histogram equalization. ,in, is the original histogram of the image, is the histogram after processing.

[0014] Preferably, the data processing module is used to determine the blockage situation in the ball valve according to the data of the servo motor and control the operation of the ultrasonic image acquisition module, and output a signal to the control module after determining the blockage of the joint between the valve seat and the ball according to the internal image of the ball valve, including the following steps: Extract features from the data fed back by the motor output acquisition module, and use experience detection to determine the blockage condition in the ball valve; Motor current or motor torque threshold detection: when the motor current or motor torque exceeds the threshold, it indicates that there is a blockage in the ball valve. ,in, is the threshold coefficient; Motor speed change detection: when the motor speed change rate or change amplitude exceeds the threshold, it indicates that there is a blockage in the ball valve. ,like If it is greater than the threshold, there is a blockage in the ball valve.

[0015] Preferably, the data processing module is used to determine the blockage situation in the ball valve according to the data of the servo motor and control the operation of the ultrasonic image acquisition module, and output a signal to the control module after determining the blockage of the joint between the valve seat and the ball according to the internal image of the ball valve, and also includes the following steps: The spectrum energy, frequency band energy, frequency center, spectrum peak, and spectrum bandwidth are input into the SVM model for identification, and the output result is the presence or absence of blockage. The SVM model separates normal and abnormal data by constructing a hyperplane. ,in, is the feature function mapped to the high-dimensional feature space, w is the weight vector, b is the bias term, is a label of the sample, wherein the label of the sample includes a blockage condition and a blockage condition; If the output results of the SVM model indicate that a blockage exists, and the output results of the motor current or motor torque threshold detection and / or motor speed change detection indicate that a blockage exists, the data processing module outputs an output result indicating that a blockage exists to the ultrasonic image acquisition module.

[0016] Preferably, the data processing module is used to determine the blockage situation in the ball valve according to the data of the servo motor and control the operation of the ultrasonic image acquisition module, and output a signal to the control module after determining the blockage of the joint between the valve seat and the ball according to the internal image of the ball valve, and also includes the following steps: The edge detection algorithm is used to detect the edges in the processed histogram. , ,in, and is the gradient of the histogram in the x and y directions, is the gray value of the histogram; By merging the edge detection results, the seam area between the valve seat and the sphere is formed; The seam width between the valve seat and the ball is tested. ,in, and are the coordinates of the seam edge; Set the width threshold to determine whether the joint between the valve seat and the ball is blocked. If the width is less than the width threshold, the output result is that the joint between the valve seat and the sphere is blocked; otherwise, the output result is that the joint between the valve seat and the sphere is not blocked.

[0017] Preferably, the control module includes an STM32F103RCT6 embedded microcontroller, and the motor drive module includes a TB67S109AFTG motor drive chip.

[0018] The present invention has the following beneficial effects: The present invention can independently judge whether blockage occurs in the ball valve. If blockage is determined, it will further judge whether the joint between the ball and the valve seat is blocked. If blockage is confirmed, the servo motor and the solenoid valve can be controlled by the control module. Through two judgments, it is confirmed that there is indeed a problem of blockage between the ball and the valve seat due to medium particles in the ball valve, so as to avoid misjudgment. After confirmation, the solenoid valve can be controlled to disconnect, so that the branch pipe blocks the water hammer eliminator and the inlet end of the valve body, and then the control module controls the servo motor to drive the valve stem and the ball to rotate to an opening of 30°-60°, so that the ball causes water hammer phenomenon in the process of blocking the fluid. At this time, the fluid can act on the valve seat, between the valve seat and the ball, and on the ball with a large impact force, so that the particles attached to the valve seat, between the valve seat and the ball, and on the ball are loosened or even dropped, and the above-mentioned action is performed once or repeatedly, and then the solid particles attached to the valve seat, between the valve seat and the ball, and on the ball are cleaned, thereby avoiding the blockage of medium particles in the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural block diagram of the congestion identification system in the present invention.

[0021] 1. Valve body; 2. Connecting seat; 3. Actuator housing; 4. Servo motor; 5. Valve stem; 6. Ball; 7. Valve seat; 8. Branch pipe; 9. Solenoid valve; 10. Water hammer eliminator; 11. Motor data acquisition module; 12. Data processing module; 13. Ultrasonic image acquisition module; 14. Control module; 15. Relay; 16. Motor drive module. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the invention is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] A medium particle anti-blocking ball valve, such as Figure 1As shown, it includes a valve body 1, a connecting seat 2 fixedly connected to the valve body 1, a valve seat 7 fixedly connected in the valve body 1, a ball 6 rotatably connected in the valve body 1 and can be arranged in a close fit with the valve seat 7, a valve stem 5 fixedly connected to the ball 6 and penetrating the connecting seat 2 and rotatably connected, an actuator shell 3 fixedly connected to the end of the connecting seat 2 away from the valve body 1, and a servo motor 4 fixedly connected to one side of the actuator shell 3, the output shaft of the servo motor 4 and the upper end of the valve stem 5 both extend into the actuator shell 3, and the output shaft of the servo motor 4 and the upper end of the valve stem 5 are transmission connected, a branch pipe 8 vertically arranged upward is connected on the outer wall of the inlet of the valve body 1, an electromagnetic valve 9 is connected to the branch pipe 8, and a water hammer eliminator 10 is connected to the end of the branch pipe 8 away from the valve body 1, and a blockage identification system is also included, the blockage identification system is coupled to the electromagnetic valve 9 and the servo motor 4, and the blockage identification system is used to determine the blockage of the joint between the valve seat 7 and the ball 6, control whether the water hammer eliminator 10 is effective, and control the servo motor 4 to cause water hammer phenomenon to flush the blockage.

[0029] The blockage identification system in the ball valve has the ability to autonomously detect whether the inside of the ball valve is blocked. The blockage identification system first determines whether there is a blockage inside the ball valve. Once a blockage is detected, the blockage identification system will conduct an in-depth analysis, paying special attention to the joint area between the ball 6 and the valve seat 7 to determine whether the blockage occurs in this key position, ensuring that the two judgment results are consistent, thereby avoiding misjudgment. When the blockage identification system confirms that the blockage phenomenon does exist, it will start the control module 14 to regulate the servo motor 4 and the solenoid valve 9.

[0030] After confirming the blockage, the blockage identification system will cut off the command solenoid valve 9 so that the branch pipe 8 can block the water hammer arrester 10 and the inlet end of the valve body 1.

[0031] Subsequently, the control module 14 will guide the servo motor 4 to drive the valve stem 5 and the ball 6 to rotate to a specific angle of 30° to 60°. During this process, the ball 6 blocks the flow of the fluid, triggering a water hammer effect and generating a strong fluid impact force. This impact force acts on the valve seat 7, the gap between the valve seat 7 and the ball 6, and the surface of the ball 6, which can effectively loosen or even fall off the attached solid particles.

[0032] The control module 14 can perform the above operation once or repeatedly to completely remove the solid particles in the valve seat 7, between the valve seat 7 and the ball 6, and on the ball 6. In this way, the blockage problem caused by medium particles inside the ball valve can be effectively prevented and solved, ensuring the long-term stable operation and high-efficiency performance of the ball valve.

[0033] Preferably, a worm is rotatably connected in the actuator housing 3 , one end of the worm is coaxially connected to the output shaft of the servo motor 4 , and a worm wheel connected to the worm is fixedly connected to the valve stem 5 in the actuator housing 3 .

[0034] By setting up a worm gear structure for transmission, when the ball 6 encounters water hammer, the fluid can impact the ball 6. When the ball 6 transmits the force to the worm through the valve stem 5 and the worm gear, the one-way transmission characteristic of the worm gear structure can be used to avoid the rotation of the output shaft of the servo motor 4, thereby ensuring the accuracy of the servo motor 4 in controlling the angle of the valve stem 5.

[0035] Preferably, if Figure 2 As shown, the blockage identification system includes a motor data acquisition module 11, an ultrasonic image acquisition module 13, a data processing module 12, and a control module 14. The motor data acquisition module 11 is used to collect data of the servo motor 4 and feed it back to the data processing module 12. The ultrasonic image acquisition module 13 is used to respond to the data processing module 12 to collect the internal image of the ball valve and feed it back to the data processing module 12. The data processing module 12 is used to determine the blockage situation in the ball valve according to the data of the servo motor 4 and control the ultrasonic image acquisition module 13 to work, and output a signal to the control module 14 after determining the blockage of the joint between the valve seat 7 and the ball 6 according to the internal image of the ball valve. The solenoid valve 9 is electrically connected through a relay 15, and the output end of the control module 14 is coupled to the controlled end of the relay 15. The output end of the control module 14 is coupled to the servo motor 4 through a motor drive module 16. The control module 14 includes an STM32F103RCT6 embedded-microcontroller, and the motor drive module 16 includes a TB67S109AFTG motor drive chip.

[0036] Preferably, the motor data acquisition module 11 is used to collect data of the servo motor 4 and feed it back to the data processing module 12, including the following steps: Collect data of servo motor 4, including motor current , motor torque , and motor speed ; The motor current , motor torque , and motor speed De-noising through low-pass filtering ,in, is the time constant of the filter, is the original signal, is the signal after filtering; Normalize the denoised motor current, motor torque, and motor speed , where x is the original data, is the normalized data, and are the maximum and minimum values ​​of the data respectively; Extracting Motor Current , motor torque , and motor speed The average value reflects the central trend of the signal, and the average value of the motor current , the average value of the motor torque , the average value of the motor speed , where N is the total number of data points; According to the motor current , motor torque , and motor speed The standard deviation of the motor current is extracted from the mean value. , standard deviation of motor torque , standard deviation of motor speed ; Calculating Motor Current , motor torque , and motor speed The skewness of the motor current , the skewness of the motor torque , the skewness of the motor speed ; Calculating Motor Current , motor torque , and motor speed The peak value of the motor current , the peak value of the motor torque , the peak value of the motor speed ; The time domain signal is converted into the frequency domain signal through the fast Fourier transform, and the spectrum of the signal is calculated through FFT. ,in, is the spectrum of the signal in the frequency domain, is the time domain signal, f is the frequency; Calculate spectrum energy, band energy, frequency center, spectrum peak, and spectrum bandwidth.

[0037] Through the above steps, after the motor data acquisition module 11 collects the data of the servo motor 4, it can also process the data before passing it to the data processing module 12, so that the data processing module 12 can have higher efficiency in calculating and draw the final conclusion.

[0038] Preferably, the ultrasonic image acquisition module 13 is used to receive the internal image of the ball valve in response to the data processing module 12 and feed it back to the data processing module 12, including the following steps: Receiving an output result from the data processing module 12 indicating that a blockage exists; In response to the output result that there is a blockage, the ultrasonic image acquisition module 13 operates and acquires an internal image of the ball valve; The internal image of the ball valve is filtered and denoised. ,in, is the original image, N is the total number of pixels in the filter area, and k is the radius of the filter window; The details and features of the internal image of the ball valve after denoising are enhanced by histogram equalization. ,in, is the original histogram of the image, is the histogram after processing.

[0039] Through the above method, under the premise of determining that the output result of the data processing module 12 is that there is a blockage, the ultrasonic image acquisition module 13 is then made to work to avoid the ultrasonic image acquisition module 13 from working frequently. Then, the ultrasonic image acquisition module 13 can be used to obtain the situation inside the ball valve without opening the valve body 1, and after obtaining the internal image of the ball valve, the internal image of the ball valve can also be processed to a certain extent, thereby reducing the amount of calculation of the internal image of the ball valve by the data processing module 12, so that the working efficiency of the data processing module 12 is further improved.

[0040] Preferably, the data processing module 12 is used to determine the blockage situation in the ball valve according to the data of the servo motor 4 and control the ultrasonic image acquisition module 13 to work, and output a signal to the control module 14 after determining the blockage of the joint between the valve seat 7 and the ball 6 according to the internal image of the ball valve, including the following steps: Extract features from the data fed back by the motor output acquisition module, and use experience detection to determine the blockage condition in the ball valve; Motor current or motor torque threshold detection: when the motor current or motor torque exceeds the threshold, it indicates that there is a blockage in the ball valve. ,in, is the threshold coefficient; Motor speed change detection: when the motor speed change rate or change amplitude exceeds the threshold, it indicates that there is a blockage in the ball valve. ,like If it is greater than the threshold, there is a blockage in the ball valve.

[0041] The above method can be used to make a rough judgment on the blockage situation in the ball valve, which can assist in further subsequent judgments.

[0042] Preferably, the data processing module 12 is used to determine the blockage situation in the ball valve according to the data of the servo motor 4 and control the operation of the ultrasonic image acquisition module 13, and output a signal to the control module 14 after determining the blockage of the joint between the valve seat 7 and the ball 6 according to the internal image of the ball valve, and further includes the following steps: The spectrum energy, band energy, frequency center, spectrum peak, and spectrum bandwidth are input into the SVM model for identification, and the output result is the presence or absence of congestion. The SVM model separates normal and abnormal data by constructing a hyperplane. ,in, is the feature function mapped to the high-dimensional feature space, w is the weight vector, b is the bias term, is the label of the sample, and the label of the sample includes whether there is a blockage or not; If the SVM model output results all indicate that a blockage exists, and the output results of the motor current or motor torque threshold detection and / or motor speed change detection indicate that a blockage exists, the data processing module 12 outputs an output result indicating that a blockage exists to the ultrasonic image acquisition module 13 .

[0043] The above method is used to make further judgments, thereby confirming that there is indeed a blockage in the ball valve, avoiding misjudgment, reducing the situation where the ultrasonic image acquisition module 13 works in vain, and ensuring the accuracy of the judgment results of the system.

[0044] Preferably, the data processing module 12 is used to determine the blockage situation in the ball valve according to the data of the servo motor 4 and control the operation of the ultrasonic image acquisition module 13, and output a signal to the control module 14 after determining the blockage of the joint between the valve seat 7 and the ball 6 according to the internal image of the ball valve, and further includes the following steps: The edge detection algorithm is used to detect the edges in the processed histogram. , ,in, and is the gradient of the histogram in the x and y directions, is the gray value of the histogram; By combining the edge detection results, a joint area between the valve seat 7 and the ball 6 is formed; The seam width between the valve seat 7 and the ball 6 is tested. ,in, and are the coordinates of the seam edge; Set the width threshold to determine whether the joint between the valve seat 7 and the ball 6 is blocked. If the width is smaller than the width threshold, the output result is that the joint between the valve seat 7 and the sphere 6 is blocked; otherwise, the output result is that the joint between the valve seat 7 and the sphere 6 is not blocked.

[0045] The above method is used to judge whether the joint between the valve seat 7 and the ball 6 is blocked according to the internal image of the ball valve, thereby ensuring the accuracy of the system's judgment on the blockage of the joint between the valve seat 7 and the ball 6 in the ball valve. Only when the accuracy is ensured can the water hammer phenomenon be deliberately caused to impact and clean the attached particles. Since the water hammer phenomenon itself will cause certain damage to the pipeline and the ball valve structure, if the water hammer phenomenon occurs frequently, it will inevitably lead to leakage in the pipeline and the ball valve. Therefore, when the system judges that it has high accuracy, the solenoid valve 9 is closed and the effect of the water hammer eliminator 10 is cancelled, thereby causing the water hammer phenomenon, which makes the frequency of the water hammer phenomenon lower. Under normal circumstances, the solenoid valve 9 is open and the water hammer eliminator 10 is in an active state, thereby reducing the impact of the water hammer phenomenon when the ball valve is normally opened and closed.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A medium particle anti-blocking ball valve, characterized in that: The invention comprises a valve body (1), a connecting seat (2) fixedly connected to the valve body (1), a valve seat (7) fixedly connected in the valve body (1), a ball (6) rotatably connected in the valve body (1) and capable of being arranged in close contact with the valve seat (7), a valve stem (5) fixedly connected to the ball (6) and penetrating through the connecting seat (2) and rotatably connected, an actuator housing (3) fixedly connected to an end of the connecting seat (2) away from the valve body (1), and a servo motor (4) fixedly connected to one side of the actuator housing (3), wherein the output shaft of the servo motor (4) and the upper end of the valve stem (5) both extend into the actuator housing (3), and the servo motor ( The valve body (4) is connected to an output shaft of the valve seat (7) and an upper end of the valve stem (5), the outer wall of the inlet of the valve body (1) is connected to a branch pipe (8) arranged vertically upward, the branch pipe (8) is connected to a solenoid valve (9), and one end of the branch pipe (8) away from the valve body (1) is connected to a water hammer eliminator (10), and also includes a blockage identification system, the blockage identification system is coupled to the solenoid valve (9) and the servo motor (4), and the blockage identification system is used to determine the blockage of the joint between the valve seat (7) and the ball (6), control whether the water hammer eliminator (10) is effective, and control the servo motor (4) to cause a water hammer phenomenon to flush the blockage.

2. A medium particle anti-blocking ball valve according to claim 1, characterized in that: A worm is rotatably connected in the actuator housing (3), one end of the worm is coaxially connected to the output shaft of the servo motor (4), and a worm wheel connected to the worm is fixedly connected to the valve stem (5) in the actuator housing (3).

3. A medium particle anti-blocking ball valve according to claim 1, characterized in that: The blockage identification system comprises a motor data acquisition module (11), an ultrasonic image acquisition module (13), a data processing module (12), and a control module (14). The motor data acquisition module (11) is used to acquire data of the servo motor (4) and feed it back to the data processing module (12). The ultrasonic image acquisition module (13) is used to respond to the data processing module (12) to acquire an internal image of the ball valve and feed it back to the data processing module (12). The data processing module (12) is used to determine the blockage situation in the ball valve according to the data of the servo motor (4) and control the operation of the ultrasonic image acquisition module (13). After determining that the joint between the valve seat (7) and the ball (6) is blocked according to the internal image of the ball valve, the signal is output to the control module (14). The solenoid valve (9) is electrically connected via a relay (15). The output end of the control module (14) is coupled to the controlled end of the relay (15). The output end of the control module (14) is coupled to the servo motor (4) via a motor drive module (16).

4. A medium particle anti-blocking ball valve according to claim 3, characterized in that: The motor data acquisition module (11) is used to collect data of the servo motor (4) and feed it back to the data processing module (12), and comprises the following steps: Collecting data of the servo motor (4), the data including the motor current , motor torque , and motor speed ; The motor current , motor torque , and motor speed De-noising through low-pass filtering ,in, is the time constant of the filter, is the original signal, is the signal after filtering; Normalize the denoised motor current, motor torque, and motor speed , where x is the original data, is the normalized data, and are the maximum and minimum values ​​of the data respectively; Extracting Motor Current , motor torque , and motor speed The average value reflects the central trend of the signal, and the average value of the motor current , the average value of the motor torque , the average value of the motor speed , where N is the total number of data points; According to the motor current , motor torque , and motor speed The standard deviation of the motor current is extracted from the mean value. , standard deviation of motor torque , standard deviation of motor speed ; Calculating Motor Current , motor torque , and motor speed The skewness of the motor current , the skewness of the motor torque , the skewness of the motor speed ; Calculating Motor Current , motor torque , and motor speed The peak value of the motor current , the peak value of the motor torque , the peak value of the motor speed ; The time domain signal is converted into the frequency domain signal through the fast Fourier transform, and the spectrum of the signal is calculated through FFT. ,in, is the spectrum of the signal in the frequency domain, is the time domain signal, f is the frequency; Calculate spectral energy, band energy, frequency center, spectral peak, and spectral bandwidth.

5. A medium particle anti-blocking ball valve according to claim 3, characterized in that: The ultrasonic image acquisition module (13) is used to respond to the data processing module (12) to acquire the internal image of the ball valve and feed it back to the data processing module (12), and comprises the following steps: Receiving an output result from the data processing module (12) indicating that a blockage exists; In response to the output result indicating that there is a blockage, the ultrasonic image acquisition module (13) operates and acquires an internal image of the ball valve; The internal image of the ball valve is filtered and denoised. ,in, is the original image, N is the total number of pixels in the filter area, and k is the radius of the filter window; The details and features of the internal image of the ball valve after denoising are enhanced by histogram equalization. ,in, is the original histogram of the image, is the histogram after processing.

6. A medium particle anti-blocking ball valve according to claim 4, characterized in that: The data processing module (12) is used to determine the blockage situation inside the ball valve according to the data of the servo motor (4) and control the operation of the ultrasonic image acquisition module (13), and output a signal to the control module (14) after determining that the joint between the valve seat (7) and the ball (6) is blocked according to the internal image of the ball valve, and comprises the following steps: Extract features from the data fed back by the motor output acquisition module, and use experience detection to determine the blockage condition in the ball valve; Motor current or motor torque threshold detection: when the motor current or motor torque exceeds the threshold, it indicates that there is a blockage in the ball valve. ,in, is the threshold coefficient; Motor speed change detection: when the motor speed change rate or change amplitude exceeds the threshold, it indicates that there is a blockage in the ball valve. ,like If it is greater than the threshold, there is a blockage in the ball valve.

7. A medium particle anti-blocking ball valve according to claim 6, characterized in that: The data processing module (12) is used to determine the blockage situation inside the ball valve based on the data of the servo motor (4) and control the operation of the ultrasonic image acquisition module (13), and output a signal to the control module (14) after determining that the joint between the valve seat (7) and the ball (6) is blocked based on the internal image of the ball valve, and further includes the following steps: The spectrum energy, frequency band energy, frequency center, spectrum peak, and spectrum bandwidth are input into the SVM model for identification, and the output result is the presence or absence of blockage. The SVM model separates normal and abnormal data by constructing a hyperplane. ,in, is the feature function mapped to the high-dimensional feature space, w is the weight vector, b is the bias term, is a label of the sample, wherein the label of the sample includes a blockage condition and a blockage condition; If the SVM model output results all indicate that a blockage exists, and the output results of the motor current or motor torque threshold detection and / or motor speed change detection indicate that a blockage exists, the data processing module (12) outputs an output result indicating that a blockage exists to the ultrasonic image acquisition module (13).

8. The medium particle anti-blocking ball valve according to claim 5, characterized in that: The data processing module (12) is used to determine the blockage situation inside the ball valve based on the data of the servo motor (4) and control the operation of the ultrasonic image acquisition module (13), and output a signal to the control module (14) after determining that the joint between the valve seat (7) and the ball (6) is blocked based on the internal image of the ball valve, and further includes the following steps: The edge detection algorithm is used to detect the edges in the processed histogram. , ,in, and is the gradient of the histogram in the x and y directions, is the gray value of the histogram; By combining the edge detection results, a joint area between the valve seat (7) and the sphere (6) is formed; The joint width between the valve seat (7) and the ball (6) is tested. ,in, and are the coordinates of the seam edge; Set a width threshold to determine whether the joint between the valve seat (7) and the ball (6) is blocked. If the width is smaller than the width threshold, the output result is that the joint between the valve seat (7) and the sphere (6) is blocked; otherwise, the output result is that the joint between the valve seat (7) and the sphere (6) is not blocked.

9. A medium particle anti-blocking ball valve according to claim 3, characterized in that: The control module (14) includes an STM32F103RCT6 embedded microcontroller, and the motor drive module (16) includes a TB67S109AFTG motor drive chip.

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