Reversing valve and fault monitoring system and control method

Abstract

The present application relates to the technical field of valve, specifically relates to a reversing valve and fault monitoring system, the reversing valve fault monitoring system and control method, reversing valve monitoring system includes reversing valve body, valve core, drive component, first pipeline and second pipeline, reversing valve body is equipped with main air inlet pipeline, reversing passage, first installation slot and second installation slot, reversing passage is communicated with main air inlet pipeline, reversing passage, first pipeline and second pipeline respectively, reversing passage extends along the length direction of reversing valve body, drive component is arranged in first installation slot, valve core is at least partially arranged in reversing passage, valve core moves in the width direction of reversing valve body to make main air inlet pipeline and first pipeline or second pipeline communicate or cut off.The reversing valve fault monitoring system of the present application can locate the fault, and is convenient for repairing and emergency response to the reversing valve.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a directional valve, a fault monitoring system, and a control method. Background Technology

[0002] Directional control valves are control components in fluid transport systems, possessing functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow splitting, and overflow pressure relief. They are widely used in industries such as water supply and drainage, heating, power plants, OEM manufacturing, food processing, textiles, papermaking, shipbuilding, steel, and coal mining. Pneumatic drilling rigs in coal mines require directional control valves for gas drive during operation. When a directional control valve malfunctions, it is necessary to promptly locate the fault and then repair and restore the valve. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a directional control valve and a fault monitoring system, which can locate faults and facilitate timely maintenance of the directional control valve.

[0004] An embodiment of the present invention provides a directional valve fault monitoring system.

[0005] Embodiments of the present invention also propose a control method for a directional valve fault monitoring system.

[0006] An embodiment of the present invention provides a reversing valve monitoring system comprising: a reversing valve body, a first pipe, and a second pipe. The reversing valve body is provided with a main air inlet pipe, a reversing channel, a first mounting slot, and a second mounting slot. The reversing channel is respectively connected to the main air inlet pipe, the reversing channel, the first pipe, and the second pipe, and extends along the length direction of the reversing valve body. The first mounting slot and the second mounting slot are arranged opposite to each other along the length direction of the reversing valve body. A valve core and a driving component are also included. The driving component is arranged in the first mounting slot, and the valve core is at least partially arranged in the reversing channel. One end of the driving component is connected to the valve core to drive the valve core to move along the length direction of the reversing valve body. To enable the main air intake duct to be connected to or disconnected from the first or second duct; a reversing valve monitoring assembly, the reversing valve monitoring assembly including a first air pressure sensor, a second air pressure sensor, a third air pressure sensor, a fourth air pressure sensor, a fifth air pressure sensor and a flow monitoring component, the first air pressure sensor being connected to the main air intake duct, the second air pressure sensor being arranged in the first mounting slot, the third air pressure sensor being connected to the first duct, the fourth air pressure sensor being connected to the second duct, the fifth air pressure sensor being arranged in the second mounting slot, the flow monitoring component being connected to the main air intake duct, and the displacement sensor being connected to the valve core, the displacement sensor being arranged in the first or second mounting slot.

[0007] The directional valve fault monitoring system of the present invention can locate faults, which facilitates the maintenance of the directional valve.

[0008] In some embodiments, the driving component includes a drive motor and a current monitoring component. The reversing valve body further includes a worm gear. A third mounting groove is provided inside the reversing valve body to mount the worm gear. The worm gear and the third mounting groove form a power channel. The second outlet and the first outlet of the power channel are both connected to the reversing channel. The current monitoring component is connected to the drive motor, and the drive motor is connected to the valve core to drive the valve core to move along the length direction of the reversing valve body.

[0009] The reversing valve monitoring assembly also includes a current monitoring component, a sixth air pressure sensor, and a seventh air pressure sensor. The sixth air pressure sensor is located at the second outlet of the power channel, and the seventh air pressure sensor is located at the first outlet of the power channel. The current monitoring component is connected to the drive motor.

[0010] In some embodiments, the reversing valve monitoring assembly further includes a first air pressure monitoring component and a second air pressure monitoring component, wherein the first air pressure monitoring component is arranged in the first mounting slot and the second air pressure monitoring component is arranged in the second mounting slot.

[0011] In some embodiments, the reversing valve monitoring system further includes a display component and a gas flow rate monitoring component. The display component includes a control component and a display screen. The control component is connected to the drive motor and the displacement sensor. The display screen is connected to the reversing valve monitoring component and the display component. The gas flow rate monitoring component is connected to the main air intake duct.

[0012] In some embodiments, the reversing valve monitoring system further includes a master control valve, which is connected to the second outlet of the main air intake duct.

[0013] The control method for the directional valve monitoring system according to an embodiment of the present invention includes:

[0014] The current of the drive motor is monitored. If the current exceeds the preset range, the drive motor is determined to be abnormal and the power to the drive motor is cut off.

[0015] If the current is within the preset range, the air pressure of the main air intake duct will be monitored. If the air pressure of the main air intake duct exceeds 0.2~0.6MPa, the main air intake duct will be deemed to be faulty.

[0016] When the air pressure in the main air intake duct is between 0.2MPa and 0.6MPa, the control valve core moves along the length of the reversing valve body. At the same time, the displacement of the valve core is monitored. If the valve core displacement exceeds the preset range, the drive motor is determined to be faulty. If the valve core displacement is less than or equal to 2mm, the valve core is determined to be stuck, and the drive motor is de-energized.

[0017] If the valve core displacement is within the preset range, monitor the air pressure and flow rate of the main air intake duct. If the flow rate of the main air intake duct is within 3m³ / s... 3 / min~8m 3 When the pressure reaches a certain value per minute, the main air intake duct is considered normal. If either the first pressure detection component or the second pressure monitoring component detects a pressure exceeding 60 kPa, the software system controlling the reversing valve monitoring system is considered faulty.

[0018] In some embodiments, the valve core is controlled to rotate forward by a drive motor to monitor the air pressure at the second outlet and the first outlet of the power channel. The monitoring checks whether the air pressure at the second outlet of the power channel meets the requirement of 0.2MPa~0.6MPa, and whether the air pressure at the first outlet of the power channel meets the requirement of being greater than or equal to 0.1MPa.

[0019] The valve core is reversed by driving the motor to monitor the air pressure at the second and first outlets of the power channel. The air pressure at the first outlet of the power channel is monitored to ensure that it meets the requirements of 0.2MPa~0.8MPa, and the air pressure at the second outlet of the power channel is monitored to ensure that it is less than 0.1MPa. If not, the worm gear is determined to be faulty, the main air inlet pipe is closed, and the valve core is moved to the initial position.

[0020] In some embodiments, if the wind pressure monitoring of the second outlet and the first outlet of the power channel is normal, and the wind pressure monitoring of the first mounting slot and the second mounting slot is performed, if the wind pressure of the first mounting slot is within a preset range, then the first mounting slot has no air leakage fault; if the wind pressure of the second mounting slot is within a preset range, then the second mounting slot has no air leakage fault.

[0021] In some embodiments, the ventilation volume is controlled by moving the valve core via a drive motor. The connection between the main air intake duct and the reversing channel is a circular hole. Flow monitoring of the main air intake duct is used to determine whether the valve core movement is within a preset range. The flow rate of the main air intake duct is Q. It is determined whether 0.9Q ≤ Q ≤ 1.2Q is satisfied. If yes, the main air intake duct is considered normal; otherwise, the valve core is moved to its initial position. The position of the valve core on the reversing valve body is determined by a displacement sensor.

[0022] When the valve core displacement is greater than B, the flow rate Q in the main air intake duct is monitored to be less than 3m³. 3 When the flow rate Q in the main air intake duct starts to increase if the valve core displacement is less than or equal to B, or if the valve core displacement is less than or equal to B, it is determined to be a valve core installation accuracy issue, and the drive motor is de-energized.

[0023] The flow rate Q in the main intake duct satisfies the following relationship: Q = V·S, S = 2πr 2 θ / 360-D·sinθ(D / 2+B+L) / 2,θ=arccos(2(D / 2+BL) / D), where L is the displacement of the tie rod in cm, D is the diameter of the air inlet at the connection between the main air intake duct and the reversing channel in cm, V is the wind speed in cm / s, and Q is the air supply flow rate of the main air intake duct in cm³. 3 / s, the initial position of the valve core is the distance B from the air inlet at the connection between the air inlet duct and the reversing channel, in mm. The air inlet at the connection between the main air inlet duct and the reversing channel is a round hole. θ is the angle of the ventilation surface relative to the air inlet at the connection between the main air inlet duct and the reversing channel.

[0024] In some embodiments, the temperature of the drive motor is monitored to see if it is within a preset range. If the temperature of the drive motor exceeds the preset range, the power to the drive motor is cut off. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a directional valve monitoring system according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the display component according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the ventilation surface according to an embodiment of the present invention.

[0028] Figure label:

[0029] The reversing valve body 1, first mounting groove 11, second mounting groove 12, reversing channel 13, worm gear 14, main air inlet duct 15, power channel 16, first outlet 17, second outlet 18.

[0030] Valve core 2,

[0031] The reversing valve monitoring assembly 3 includes a first air pressure sensor 31, a second air pressure sensor 32, a third air pressure sensor 33, a fourth air pressure sensor 34, a fifth air pressure sensor 35, a flow monitoring component 36, a first pressure monitoring component 37, a second pressure monitoring component 38, a displacement sensor 39, a display component 40, and a main control valve 41.

[0032] First pipe 4, second pipe 5, drive component 6, air inlet 7, ventilation surface 8, sixth air pressure sensor 9, seventh air pressure sensor 10. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] The reversing valve monitoring system of this invention includes a valve core 2, a reversing valve monitoring component 3, a drive component 6, a reversing valve body 1, a first pipe 4, and a second pipe 5. The reversing valve body is provided with a main air inlet pipe 15, a reversing channel 13, a first mounting groove 11, and a second mounting groove 12. The reversing channel 13 is connected to the main air inlet pipe 15, the reversing channel 13, the first pipe 4, and the second pipe 5, respectively. The reversing channel 13 extends along the length direction of the reversing valve body 1. The first mounting groove 11 and the second mounting groove 12 are arranged opposite to each other along the length direction of the reversing valve body 1. The drive component 6 is arranged in the first mounting groove 11. The valve core 2 is at least partially arranged in the reversing channel 13. One end of the drive component 6 is connected to the valve core 2. The valve core 2 is connected to drive the valve body 1 to move in the width direction of the valve core 2. The valve core 2 moves in the width direction of the valve body to connect or disconnect the main air intake pipe from the first pipe 4 or the second pipe 5. The valve monitoring component 3 includes a first air pressure sensor 31 connected to the main air intake pipe 15, a second air pressure sensor 32 arranged in the first mounting slot 11, a third air pressure sensor 33 connected to the first pipe 4, a fourth air pressure sensor 34 connected to the second pipe 5, a fifth air pressure sensor 35 arranged in the second mounting slot 12, a flow monitoring component 36 connected to the main air intake pipe 15, and a displacement sensor 39 connected to the valve core 2. The displacement sensor 39 is arranged in the first mounting slot 11 or the second mounting slot 12.

[0035] Specifically, the valve core 2 extends in the left-right direction, and the reversing valve body 1 is provided with a reversing channel 13 extending in the left-right direction. The left end of the reversing valve body 1 is provided with a first mounting groove 11, in which a drive component 6 and a second air pressure sensor 32 are installed. The second air pressure sensor 32 is adapted to monitor the air pressure in the first mounting groove 11.

[0036] The right end of the reversing valve body 1 is provided with a second mounting groove 12, in which a fifth air pressure sensor 35 is installed. The fifth air pressure sensor 35 is suitable for monitoring the air pressure in the second mounting groove 12. The lower end of the air inlet pipe is connected to the upper end of the reversing valve body 1, thereby connecting the main air inlet pipe 15 with the reversing channel 13. The first pipe 4 and the second pipe 5 are distributed and connected to the upper end of the reversing valve body 1, and the first pipe 4, the main air inlet pipe 15 and the second pipe 5 are arranged alternately in the left and right directions. The valve core 2 extends out of the reversing channel 13 at both ends. The driving component 6 drives the valve core 2 to move in the left and right directions to connect the main air inlet pipe 15 with the first pipe 4 or the second pipe 5.

[0037] The first air pressure sensor 31 is connected to the main air intake duct 15 to monitor whether the air pressure in the intake duct is within a preset range. If it is, the main air intake duct 15 is normal; otherwise, the main air intake duct 15 is faulty. The third air pressure sensor 33 is connected to the first duct 4 to monitor whether the air pressure in the first duct 4 is within a preset range. The fourth air pressure sensor 34 is connected to the second duct 5 to monitor whether the air pressure in the second duct 5 is within a preset range.

[0038] Displacement sensor 39 is connected to valve core 2. Flow monitoring component 36 is adapted to monitor the flow rate of main air intake duct 15. Driving component 6 drives valve core 2 to move in the left-right direction. Displacement sensor 39 monitors the displacement of valve core 2 in the left-right direction. It can be understood that the movement of valve core 2 in the left-right direction can change the air intake area of ​​main air intake duct 15 and reversing channel 13. The size of the air intake area can be calculated by monitoring the movement of valve core 2 in the left-right direction. By setting displacement sensor 39 to monitor the movement of valve core 2, and cooperating with the first air pressure sensor 31 to dynamically monitor the air volume and air pressure of main air intake duct 15, the accuracy of air volume and air pressure monitoring of main air intake duct 15 is improved. For example, the size of the air intake area and the flow rate have a fixed proportional relationship, which facilitates flow rate monitoring of main air intake duct 15.

[0039] Furthermore, by setting a displacement sensor 39 to monitor the movement of the valve core 2, and cooperating with the first air pressure sensor 31, the third air pressure sensor 33, the fourth air pressure sensor 34, the main air intake duct 15, the first duct 4 or the second duct 5 to monitor the air volume and air pressure, the accuracy of monitoring the air volume and air pressure of the first duct 4, the main air intake duct 15 and the second duct 5 is improved. The size of the air intake area is set with a fixed proportional relationship with the first outlet 17 of the main air intake duct 15. For example, the air pressure difference between the air pressure of the main air intake duct 15 and the second outlet 18 and the air pressure of the first outlet 17 is fixed. By changing the size of the ventilation area, the resistance of air entering the reversing channel 13 from the main air intake duct 15 is changed, which facilitates the flow monitoring of the main air intake duct 15, the first duct 4 and the second duct 5, improves the accuracy and precision of fault monitoring of the reversing valve and the fault monitoring system, and facilitates accurate fault location.

[0040] The directional valve and fault monitoring system of the present invention can locate faults and facilitate timely maintenance of the directional valve.

[0041] In some embodiments, the driving component 6 includes a drive motor and a current monitoring component. The reversing valve body 1 also includes a worm gear 14. A third mounting groove is provided in the reversing valve body 1 for mounting the worm gear 14. The worm gear 14 and the third mounting groove form a power channel 16. The second outlet 18 and the first outlet 17 of the power channel 16 are both connected to the reversing channel 13. The current monitoring component is connected to the drive motor, and the drive motor is connected to the valve core 2 to drive the valve core 2 to move in the longitudinal direction of the reversing valve body 1.

[0042] The reversing valve monitoring assembly also includes a sixth air pressure sensor 9 and a seventh air pressure sensor 10. The sixth air pressure sensor 9 is located at the second outlet 18 of the power channel 16, and the seventh air pressure sensor 10 is located at the first outlet 17 of the power channel 16. The output end of the drive motor is connected to the worm gear 14, the worm gear 14 is in contact with the worm, the worm is connected to the valve core 2, and the current monitoring component is connected to the drive motor.

[0043] Specifically, the drive motor can be a dual-axis motor. A worm gear 14 is installed in the third mounting slot. The second outlet 18 and the first outlet 17 of the power channel 16 are respectively connected to the reversing channel 13. For example, the valve core 2 moves in the left and right direction to connect the main air intake pipe 15 to the second outlet 18 of the power channel 16, and the first outlet 17 of the power channel 16 to the first pipe 4. Then, the worm gear 14 uses the kinetic energy of the air to convert it into mechanical energy, that is, the worm gear 14 rotates counterclockwise, thereby driving the pneumatic drilling rig to rotate forward.

[0044] Alternatively, the valve core 2 moves in the left-right direction to connect the main air intake pipe 15 with the first outlet 17 of the power channel 16, and the second outlet 18 of the power channel 16 with the second pipe 5. This allows the worm gear 14 to utilize the kinetic energy of the air to convert it into mechanical energy, thereby driving the pneumatic drilling rig to reverse.

[0045] The sixth air pressure sensor 9 is located at the second outlet 18 of the power channel 16, and the seventh air pressure sensor 10 is located at the first outlet 17 of the power channel 16. When the valve core 2 moves in the left and right direction to connect the main air intake pipe 15 with the second outlet 18 of the power channel 16, the air pressure at the second outlet 18 of the power channel 16 is 0.2~0.6MPa, and the air pressure at the first outlet 17 of the power channel 16 is less than 0.1MPa. When the valve core 2 moves in the left and right direction to connect the main air intake pipe 15 with the first outlet 17 of the power channel 16, the air pressure at the first outlet 17 of the power channel 16 is 0.2~0.8MPa, and the air pressure at the second outlet 18 of the power channel 16 is less than 0.1MPa. It can be understood that the monitoring time of the air pressure at the first outlet 17 and the second outlet 18 of the power channel 16 can be extended to detect the stability of the air pressure, so as to avoid failure to detect faults in time and affect the stability and safety of the reversing valve.

[0046] In some embodiments, the reversing valve monitoring assembly 3 further includes a first pressure monitoring component 37 and a second pressure monitoring component 38, wherein the first pressure monitoring component 37 is arranged in the first mounting groove 11 and the second pressure monitoring component 38 is arranged in the second mounting groove 12.

[0047] Specifically, the first pressure monitoring component 37 is arranged in the first mounting groove 11. When the valve core 2 moves to the left, it comes into contact with the first pressure monitoring component 37. By applying a leftward force to the first pressure monitoring component 37 when the valve core 2 moves to the left, the first pressure monitoring component 37 can monitor the leftward position change of the valve core 2. In turn, the first pressure monitoring component 37 can monitor the leftward torque and pressure of the valve core 2. By monitoring the torque of the valve core 2 at different positions in the left and right directions, it can monitor whether the output force of the drive motor on the valve core 2 meets the preset range. In this way, fault monitoring can be performed on the leftward movement process of the valve core 2 to avoid the torque output by the drive motor exceeding the preset range or the valve core 2 getting stuck, which would cause abnormal torque output by the drive motor. This makes it easy to monitor the torque when the valve core 2 moves.

[0048] The second wind pressure sensor 32 is arranged in the second mounting slot 12. When the valve core 2 moves to the right, it comes into contact with the second pressure monitoring component 38. By moving the valve core 2 to the right, a force is applied to the second pressure monitoring component 38 to the right, thereby enabling the second pressure monitoring component 38 to monitor the torque and pressure of the valve core 2 to the right. By monitoring the torque of the valve core 2 at different positions in the left and right directions, it is possible to monitor whether the force output by the drive motor to the valve core 2 meets the preset range. This allows for fault monitoring of the movement of the valve core 2 to the right, preventing the torque output by the drive motor from exceeding the preset range or the valve core 2 from jamming, which would cause abnormal torque output by the drive motor. This facilitates the monitoring of the torque when the valve core 2 moves.

[0049] It is understandable that the displacement sensor 39 can also monitor the valve core 2 in the left and right directions, thereby enabling the first pressure monitoring component 37 and the second pressure monitoring component 38 to monitor the displacement of the valve core 2. This facilitates the monitoring of the usage status of the first pressure monitoring component 37 and the second pressure monitoring component 38. For example, if the displacement sensor 39 detects that the valve core 2 moves 2mm to the left, and the first pressure monitoring component 37 detects that the valve core 2 moves 1.5mm, then the first pressure monitoring component 37 is abnormal. By setting the displacement sensor 39, the accuracy of monitoring the operation of the valve core 2 and the drive motor can be improved, preventing the valve core 2 or the drive motor and the first and second pressure monitoring components 37 and 38 from continuing to work abnormally, which could lead to abnormalities in the pneumatic drilling machine. This improves the accuracy of the directional valve monitoring system in fault monitoring, facilitates fault location, and makes it easier for operators to repair the fault.

[0050] In some embodiments, the reversing valve monitoring system further includes a display component 40 and a gas flow rate monitoring component. The display component 40 includes a control component and a display screen. The control component is connected to a drive motor and a displacement sensor 39. The display screen is connected to the reversing valve monitoring component 3 and the display component 40. The gas flow rate monitoring component is connected to the main air intake duct.

[0051] Specifically, the control component is connected to the drive motor, and controls the torque and rotation angle of the drive motor, thereby controlling the movement of the valve core 2 in the left and right directions. In conjunction with the displacement sensor 39, the first pressure monitoring component 37, and the second pressure monitoring component 38, the control component monitors the movement and torque of the valve core 2 in the left and right directions, preventing the drive motor and valve core 2 from continuing to work after a failure. In addition, the control component can also set the initial position of the valve core 2 to prevent the initial position of the valve core 2 from changing after multiple working cycles, which could lead to a failure in the operation of the valve core 2, thereby improving the stability and safety of the monitoring of the valve core 2.

[0052] In some embodiments, the reversing valve monitoring system further includes a main control valve 41, which is connected to the second outlet 18 of the main air intake duct 15.

[0053] The control method for the directional valve monitoring system of this invention includes:

[0054] S1: Monitor the current of the drive motor. If the current exceeds the preset range, the drive motor is determined to be abnormal, and the power to the drive motor is cut off.

[0055] S2: If the current is within the preset range, monitor the air pressure of the main air intake duct 15. If the air pressure of the main air intake duct 15 exceeds 0.2~0.8MPa, the main air intake duct 15 is determined to be faulty.

[0056] S3: When the air pressure in the main air intake duct 15 is between 0.2 and 0.8 MPa, the control valve core 2 moves along the length of the reversing valve body 1. Simultaneously, the displacement of the valve core 2 is monitored. If the displacement of the valve core 2 exceeds the preset range, it is determined that the valve core 2 is stuck, and the drive motor is de-energized.

[0057] S4: If the displacement of valve core 2 is within the preset range, monitor the flow rate of the main air inlet duct 15. When the flow rate of the main air inlet duct 15 is between 3 and 8 m³ / s... 3 When the air pressure in the main air intake duct is between 0.2 and 0.8 MPa, the main air intake duct 15 is considered normal. If the air pressure in the main air intake duct 15 exceeds 60 kPa, or if the air pressure detected by either the first air pressure detection component 37 or the second air pressure monitoring component 38 exceeds 60 kPa, the control software controlled by the reversing valve monitoring system is considered abnormal.

[0058] Specifically, the current of the drive motor is monitored. If the current exceeds the preset range, the drive motor is determined to be abnormal and the power to the drive motor is cut off. The preset range of the drive motor current can be ≤0.6A or >1.6A.

[0059] If the current of the drive motor is within the preset range, the air pressure of the main air intake duct 15 is monitored. When the air pressure of the main air intake duct 15 exceeds 0.2~0.8MPa, the main air intake duct 15 is determined to be faulty. The main air intake duct 15 is then closed through the main control valve 41 to troubleshoot the main air intake duct 15. At the same time, the air supply equipment is inspected and repaired.

[0060] When the air pressure in the main air intake duct 15 is between 0.2 and 0.8 MPa, the control valve core 2 moves along the length of the reversing valve body 1. Simultaneously, the displacement of the valve core 2 is monitored. For example, the valve core 2 is monitored by a displacement sensor 39, a first air pressure monitoring component 37, and a second air pressure monitoring component 38. If the displacement of the valve core 2 exceeds a preset range, a drive motor malfunction is determined. If the displacement of the valve core 2 is less than or equal to 2 mm, the valve core 2 is determined to be stuck, and the drive motor is de-energized.

[0061] If the displacement of valve core 2 is within the preset range, monitor the air pressure and flow rate of the main air inlet duct 15. If the flow rate of the main air inlet duct 15 is within 3m³ / s... 3 / min~8m 3 When the air pressure of the main air intake duct 15 is between 0.2 and 0.8 MPa, the main air intake duct 15 is considered normal. If the pressure detected by either the first air pressure detection component 37 or the second air pressure monitoring component 38 exceeds 60 kPa, the control software controlled by the reversing valve monitoring system is considered abnormal.

[0062] The control method of the directional valve monitoring system in this embodiment of the invention monitors faults at various positions of the directional valve system. When a fault occurs in the directional valve system, it is convenient to locate the fault in a timely manner. By setting a displacement sensor 39, the accuracy of monitoring the movement of the valve core 2 is improved, and the valve core 2 is prevented from continuing to work when it exceeds the preset range or malfunctions, thus avoiding damage. This improves the stability and safety of the directional valve monitoring system.

[0063] Furthermore, by controlling the valve core 2 to rotate forward via the drive motor, the air pressure of the second outlet 18 and the first outlet 17 of the power channel 16 is monitored. The monitoring checks whether the air pressure at the second outlet 18 of the power channel 16 meets the requirement of 0.2MPa~0.8MPa, and whether the air pressure at the first outlet 17 of the power channel 16 meets the requirement of being less than 0.1MPa. At this time, the main air inlet pipe 15 is connected to the second outlet 18 of the power channel 16, and the first outlet 17 of the power channel 16 is connected to the first pipe 4.

[0064] The valve core 2 is reversed by the drive motor to monitor the air pressure at the second outlet 18 and the first outlet 17 of the power channel 16. The system monitors whether the air pressure at the second outlet 18 of the power channel 16 is greater than or equal to 0.1 MPa, and whether the air pressure at the first outlet 17 of the power channel 16 is between 0.2 MPa and 0.6 MPa. If not, the worm gear 14 is deemed faulty, the main air intake duct 15 is closed, and the valve core 2 is moved to its initial position. At this time, the first outlet 17 of the main air intake duct 15 is connected to the first outlet 17 of the power channel 16, and the first outlet 17 of the power channel 16 is connected to the second duct 5. By monitoring the air pressure of the power channel 16, a fault in the worm gear 14 can be detected promptly, improving the stability and safety of the reversing valve monitoring system.

[0065] Furthermore, if the wind pressure monitoring of the second outlet 18 and the first outlet 17 of the power channel 16 is normal, and the wind pressure monitoring of the first mounting slot 11 and the second mounting slot 12 is performed, if the wind pressure of the first mounting slot 11 is within the preset range, then the first mounting slot 11 has no air leakage fault; if the wind pressure of the second mounting slot 12 is within the preset range, then the second mounting slot 12 has no air leakage fault.

[0066] Furthermore, the ventilation volume is controlled by moving the valve core 2 via the drive motor. The flow rate of the main air intake duct 15 is monitored to determine if the movement of the valve core 2 is within a preset range. It is determined whether Q satisfies 0.9Q≤Q≤1.2Q. If yes, the main air intake duct 15 is considered normal; otherwise, the valve core 2 is moved to its initial position. The position of the valve core 2 on the reversing valve body 1 is determined by the displacement sensor 39. When the displacement of the valve core 2 is greater than B, the flow rate Q of the main air intake duct 15 is less than 3 m³ / min. Or, when the displacement of the valve core 2 is less than or equal to B, the flow rate Q of the main air intake duct 15 begins to increase, indicating a problem with the valve core 2's installation accuracy. The drive motor is then de-energized. The flow rate Q of the main air intake duct 15 satisfies the following relationship:

[0067] Q = V·S, S = 2πr 2 θ / 360-D·sinθ·(D / 2+B+L) / 2,θ=arccos(2(D / 2+BL) / D), where L is the displacement of the tie rod in cm, D is the diameter of the air inlet 7 at the connection between the main air intake duct 15 and the reversing channel 13 in cm, V is the wind speed in cm / s, and Q is the air flow rate supplied by the main air intake duct 15 per unit time in cm 3 / s, the initial position of valve core 2 is the distance B from the air inlet 7 at the connection between the main air inlet duct 15 and the reversing channel 13, in mm, and θ is the angle of the ventilation surface at the air inlet 7 at the connection between the main air inlet duct 15 and the reversing channel 13.

[0068] When the displacement of valve core 2 is less than or equal to B, the main air intake duct 15 is not connected to the air inlet 7, and the flow rate Q of the main air intake duct 15 begins to increase. This is determined to be a problem with the installation accuracy of valve core 2. It should be noted that when Q does not satisfy 0.9Q≤Q≤1.2Q, the distance that valve core 2 moves deviates from the displacement driven by the set drive motor. The initial position of valve core 2 needs to be calibrated. By cooperating with the drive motor and the displacement sensor 39, valve core 2 is moved to its initial position, that is, the initial position of valve core 2 is reset. When valve core 2 moves again and Q still does not satisfy 0.9Q≤Q≤1.2Q, the drive motor is determined to be faulty.

[0069] Furthermore, the temperature of the drive motor is monitored to ensure it remains within a preset range. If the temperature exceeds the preset range, the drive motor is powered off. Alternatively, the drive motor can be moved to its initial position and then powered off. The operator then performs maintenance on the drive motor.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A directional control valve monitoring system, characterized in that, include: The reversing valve body comprises a first pipe and a second pipe. The reversing valve body is provided with a main air inlet pipe, a reversing channel, a first mounting groove and a second mounting groove. The reversing channel is connected to the main air inlet pipe, the reversing channel, the first pipe and the second pipe respectively. The reversing channel extends along the length direction of the reversing valve body. The first mounting groove and the second mounting groove are arranged opposite to each other along the length direction of the reversing valve body. The valve core and drive component are provided, the drive component being disposed within the first mounting slot, and the valve core being at least partially disposed within the reversing channel. One end of the drive component is connected to the valve core to drive the valve core to move in the length direction of the reversing valve body. The valve core moves in the length direction of the reversing valve body to make the main air intake pipe connected to or disconnected from the first pipe or the second pipe. The reversing valve monitoring assembly includes a first air pressure sensor, a second air pressure sensor, a third air pressure sensor, a fourth air pressure sensor, a fifth air pressure sensor, and a flow monitoring component. The first wind pressure sensor is connected to the main air intake duct, the second wind pressure sensor is arranged in the first mounting slot, the third wind pressure sensor is connected to the first duct, the fourth wind pressure sensor is connected to the second duct, the fifth wind pressure sensor is arranged in the second mounting slot, the flow monitoring component is connected to the main air intake duct, the displacement sensor is connected to the valve core, and the displacement sensor is arranged in the first mounting slot or the second mounting slot.

2. The directional valve monitoring system according to claim 1, characterized in that, The driving component includes a drive motor and a current monitoring component. The reversing valve body also includes a worm gear. A third mounting groove is provided inside the reversing valve body to mount the worm gear. The worm gear and the third mounting groove form a power channel. The second outlet and the first outlet of the power channel are both connected to the reversing channel. The current monitoring component is connected to the drive motor, and the drive motor is connected to the valve core to drive the valve core to move along the length direction of the reversing valve body. The reversing valve monitoring component also includes a sixth air pressure sensor and a seventh air pressure sensor. The sixth air pressure sensor is located at the second outlet of the power channel, and the seventh air pressure sensor is located at the first outlet of the power channel. The current monitoring component is connected to the drive motor.

3. The directional valve monitoring system according to claim 2, characterized in that, The reversing valve monitoring assembly further includes a first pressure monitoring component and a second pressure monitoring component, wherein the first pressure monitoring component is arranged in the first mounting slot and the second pressure monitoring component is arranged in the second mounting slot.

4. The directional valve monitoring system according to claim 3, characterized in that, It also includes a display component and a gas flow rate monitoring component. The display component includes a control component and a display screen. The control component is connected to the drive motor and the displacement sensor. The display screen is connected to the reversing valve monitoring component and the display component. The gas flow rate monitoring component is connected to the main air intake duct.

5. The directional valve monitoring system according to claim 4, characterized in that... It also includes a master control valve, which is connected to the second outlet of the main air intake duct.

6. A control method for a directional valve monitoring system, utilizing the directional valve monitoring system of claim 5, characterized in that, include: S1: Monitor the current of the drive motor. If the current exceeds the preset range, the drive motor is determined to be abnormal and the power to the drive motor is cut off. S2: If the current is within the preset range, the air pressure of the main air intake duct will be monitored. If the air pressure of the main air intake duct exceeds 0.2~0.8MPa, the main air intake duct will be deemed to be faulty. S3: When the air pressure in the main air intake duct is between 0.2 and 0.8 MPa, the control valve core moves along the length of the reversing valve body, and the displacement of the valve core is monitored. When the displacement of the valve core exceeds the preset range, it is determined that the valve core is stuck and the power to the drive motor is cut off. S4: If the valve core displacement is within the preset range, monitor the air pressure and flow rate of the main air intake duct. If the flow rate of the main air intake duct is between 3 and 8 m³ / s... 3 When the air pressure in the main air intake duct is between 0.2 and 0.8 MPa, the main air intake duct is considered normal. If the pressure detected by either the first pressure detection component or the second pressure monitoring component exceeds 60 kPa, the software system controlled by the reversing valve monitoring system is considered faulty.

7. The control method for the reversing valve monitoring system according to claim 6, characterized in that, S5: The valve core is moved along the length of the reversing valve body by controlling the drive motor. When the drive motor rotates forward, the air pressure at the second and first outlets of the power channel is monitored. The air pressure at the second outlet of the power channel is monitored to ensure that it meets the requirement of 0.2MPa~0.8MPa, and the air pressure at the first outlet of the power channel is less than 0.1MPa. The valve core is controlled by the drive motor to move along the length of the reversing valve body. When the drive motor reverses, the air pressure of the second and first outlets of the power channel is monitored. The air pressure of the first outlet of the power channel is monitored to ensure that it meets the requirements of 0.2MPa~0.8MPa, and the air pressure of the second outlet of the power channel is monitored to ensure that it is less than 0.1MPa. If not, the worm gear is determined to be faulty, the main air inlet pipe is closed, and the valve core is moved to the initial position.

8. The control method for the reversing valve monitoring system according to claim 7, characterized in that, S6: The wind pressure monitoring of the second and first outlets of the power channel is normal. The wind pressure monitoring of the first and second mounting slots is performed. If the wind pressure of the first mounting slot is within the preset range, then there is no air leakage fault in the first mounting slot. If the wind pressure of the second mounting slot is within the preset range, then there is no air leakage fault in the second mounting slot.

9. The control method for the reversing valve monitoring system according to claim 7, characterized in that, S7: Monitor the temperature of the drive motor and check if the temperature of the drive motor is within the preset range. If the temperature of the drive motor exceeds the preset range, disconnect the power to the drive motor.

Images