Valve monitoring device and use method

Abstract

The invention provides a valve monitoring device which comprises a driving unit, the driving unit comprises an adjusting mechanism and a driving mechanism, the adjusting mechanism comprises a cylinder body used for containing fluid, a piston arranged in the cylinder body and a spring cylinder arranged opposite to the cylinder body and containing a compression spring; the driving mechanism comprises a worm arranged between the piston and the compression spring, a valve rod perpendicular to the worm, a worm gear meshed with the worm and connected to the outside of the valve rod in a sleeving mode, a valve monitoring mechanism arranged above the valve rod and a controller. The connecting rod is arranged between the controller and the valve rod, the valve is arranged at the free end of the valve rod, a valve opening degree testing module is arranged in the controller, and the valve opening degree testing module is constructed to be capable of obtaining opening degree data of the valve according to the rotating stroke of the connecting rod.

Description

Technical Field

[0001] The invention relates to the field of pipeline emergency shut-off valves, and in particular to a valve monitoring device and a use method based on the valve monitoring device. Background Art

[0002] Emergency shut-off valves are key equipment on pipelines in the petrochemical industry.

[0003] When an emergency occurs, the emergency shut-off valve can realize the emergency shut-off of the pipeline, which is an important means to reduce the expansion and spread of accidents. However, the emergency shut-off valve is usually inactive, and the status of the emergency shut-off valve is usually not monitored in real time. Therefore, the emergency shut-off valve is at risk of failure in an accident. For example, the failure of the solenoid valve used in the pneumatic actuator, instrument air leakage, cylinder status, etc. require on-site inspection, and the electro-hydraulic actuator is very likely to leak oil if it is not in operation for a long time, which is very likely to cause the risk of valve failure.

[0004] CN115824519B discloses a comprehensive diagnosis method for valve leakage faults based on multi-sensor information fusion. It includes the following steps: S1. Data preprocessing; S2. Offline training; S3. Online monitoring. It uses TSST, a high-energy concentrated time-frequency analysis method with the ability to analyze complex high-frequency non-stationary signals, to characterize time-frequency and modal information, and combines multi-sensor fusion convolutional neural networks to introduce spatial information. During the offline training process, TSST is used to obtain time-frequency images of sensors at different positions with no leakage, internal valve leakage, and external valve leakage under various working conditions in the source domain, and the model parameters saved in the source domain are imported into the comprehensive diagnosis model of valve leakage in the target domain to achieve online monitoring. The device has the ability to comprehensively diagnose faults, but its implementation method is relatively complicated, which will seriously increase the production cost and labor cost of the construction work.

[0005] CN218377937U discloses an angular stroke pneumatic actuator for valves, which includes two groups of pressure diaphragm chambers, which are arranged correspondingly between adjacent pressure diaphragm chambers, and the pressure diaphragm chambers include an upper diaphragm cover, a lower diaphragm cover and an elastic diaphragm, and the elastic diaphragm is detachably connected to a push rod, and the push rod is provided with a buffer, and a conversion box is provided between the two groups of pressure diaphragm chambers, and an output shaft is meshed and connected between adjacent push rods through a transmission assembly. The device is provided with two groups of corresponding pressure diaphragm chambers, and the output shaft is turned by gear drive, so that the device can meet the valve execution requirements of large torque; by providing a buffer with a buffer spring, the elastic diaphragm is buffered and shock-absorbing, so as to avoid violent impact of the elastic diaphragm during the reset process and reduce the damage degree of the push rod. The device does not have the detection function of the valve, and cannot monitor the effectiveness of the valve when it is not working.

[0006] Therefore, it is desired in the art to provide a valve monitoring device and a method of use to solve the above technical problems. Summary of the invention

[0007] The purpose of the present invention is to propose a valve monitoring device, which is provided with a valve opening test module, so that the rotation of the valve stem can be indirectly recorded according to the rotation stroke of the connecting rod, so as to obtain the valve opening information in real time, and then the opening and closing of the valve can be accurately adjusted to improve the safety of the valve.

[0008] According to a first aspect of the present invention, a valve monitoring device is provided, comprising a drive unit, the drive unit comprising an adjustment mechanism and a drive mechanism, wherein

[0009] The regulating mechanism comprises a cylinder body for containing fluid, a piston arranged in the cylinder body, and a spring cylinder arranged opposite to the cylinder body and containing a compression spring;

[0010] The driving mechanism includes a worm arranged between the piston and the compression spring, a valve stem vertically distributed with the worm, and a worm wheel meshed with the worm and sleeved on the outside of the valve stem.

[0011] A valve monitoring mechanism is arranged above the valve stem, comprising a controller and a connecting rod arranged between the controller and the valve stem, and

[0012] for a valve disposed at the free end of the valve stem,

[0013] Wherein, a valve opening test module is provided in the controller, and the valve opening test module is configured to obtain the opening data of the valve according to the rotation stroke of the connecting rod.

[0014] In one embodiment, the valve monitoring device also includes a control box arranged on the valve stem and below the driving mechanism, the control box being configured to control the driving unit and the valve monitoring mechanism, and including a main body portion configured in a cylindrical form, and a protruding portion extending radially outward from the main body portion.

[0015] In one embodiment, the valve monitoring device further comprises three oil film detectors, one of which is arranged on the protruding portion, and the other two oil film detectors are arranged on the main body on both sides of the protruding portion, respectively.

[0016] The oil film detector is configured to send an alarm to the controller when a hydraulic oil leak is detected.

[0017] In one embodiment, the outer peripheral surface of the piston is sealedly connected to the inner peripheral surface of the cylinder body to divide the cylinder body into an upper space and a lower space.

[0018] The regulating mechanism further includes a first pipeline for delivering fluid to the upper space, and a second pipeline for receiving fluid from the lower space.

[0019] In one embodiment, a first sensor and a second sensor for measuring the fluid pressure in the upper space and the lower space are respectively provided on the first pipeline and the second pipeline, and the first sensor and the second sensor are both connected to the controller.

[0020] The first sensor and the second sensor are both configured to send an alarm to the controller when the detected pressure value is lower than 85% to 95% of the normal value, so as to prompt the user to perform troubleshooting.

[0021] In one embodiment, the fluid includes any one of hydraulic oil and compressed air.

[0022] In one embodiment, the valve monitoring device further comprises a valve body mechanism disposed in the control box, and a monitoring module disposed in the controller.

[0023] Wherein, the monitoring module is configured to monitor the voltage value and the current value of the valve body mechanism when power is turned on, and to send an alarm to the controller when the detected voltage value and the current value exceed the working range of the valve body mechanism;

[0024] The monitoring module is configured to monitor the resistance value of the valve body mechanism when no power is supplied, and to determine the working condition of the valve body mechanism according to the detected resistance value.

[0025] In one embodiment, the valve body mechanism includes a first solenoid valve provided on the first pipeline and used to control the opening and closing of the upper space, and a second solenoid valve provided on the second pipeline and used to control the opening and closing of the lower space.

[0026] In one embodiment, the first solenoid valve is farther from the cylinder body than the first sensor; and the second solenoid valve is farther from the cylinder body than the second sensor.

[0027] In one embodiment, the valve body mechanism also includes a third solenoid valve for stroke testing, which is arranged on the first pipeline and in parallel with the first solenoid valve, and a fourth solenoid valve for stroke testing, which is arranged on the second pipeline and in parallel with the second solenoid valve. The third solenoid valve and the fourth solenoid valve are both connected to a partial stroke monitoring module in the controller.

[0028] According to a second aspect of the present invention, there is provided a method for using the valve monitoring device as described above, comprising the following steps:

[0029] S1. Opening the first solenoid valve through the control box to allow compressed air to enter the upper space through the first pipeline, thereby pushing the piston to discharge the compressed air in the lower space to open the valve under the action of the driving mechanism, and storing closing energy by causing the compression spring to contract in the spring cylinder;

[0030] S2. The control box is used to cause the first solenoid valve to release the compressed air in the upper space. Under the action of the closing energy, the piston moves in a direction away from the compression spring to close the valve under the action of the driving mechanism.

[0031] According to a third aspect of the present invention, there is provided a method for using the valve monitoring device as described above, comprising the following steps:

[0032] S1. Opening the first solenoid valve through the control box to allow hydraulic oil to enter the upper space through the first pipeline, thereby pushing the piston to discharge the hydraulic oil in the lower space to open the valve under the action of the driving mechanism, and storing closing energy by causing the compression spring to contract in the spring cylinder;

[0033] S2. The control box is used to cause the first solenoid valve to release the hydraulic oil in the upper space. The piston moves away from the compression spring under the action of the closing energy to close the valve under the action of the driving mechanism.

[0034] In one embodiment, a partial stroke test method is also included:

[0035] The third solenoid valve and the fourth solenoid valve are opened respectively by the partial stroke monitoring module,

[0036] A small flow of fluid is injected into the lower space through the fourth solenoid valve, and the piston and the driving mechanism both move in a direction away from the compression spring under the action of the fluid in the lower space, thereby causing the fluid in the upper space to be discharged outward through the first pipeline, so that the valve performs a partial stroke movement to one side, and the partial stroke test ends;

[0037] A small flow of fluid is injected into the upper space through the third solenoid valve to reset the piston and the driving mechanism and to cause the fluid in the lower space to be discharged outward through the second pipeline to reset the valve.

[0038] In one embodiment, the small flow rate of fluid accounts for 2% to 8% of the total flow rate that drives the valve to move through its full stroke.

[0039] Compared with the prior art, the advantages of the present invention are:

[0040] First, the present invention is provided with a valve opening test module, so that the rotation of the valve stem can be indirectly recorded according to the rotation stroke of the connecting rod, so as to obtain the valve opening information in real time, and then the opening and closing of the valve can be accurately adjusted to improve the safety of the valve.

[0041] Secondly, the present invention sets a first sensor on the first pipeline and a second sensor on the second pipeline, so as to realize recording and monitoring of the pressure (compressed air or hydraulic oil) in the upper space and the lower space of the cylinder respectively. Moreover, when the pressure value in the upper space or the lower space is lower than the set value, an alarm signal will be sent to the controller, so as to prompt the staff to troubleshoot the fault at a faster speed, so as to improve the working efficiency and working quality of the valve monitoring device.

[0042] Third, the present invention provides a valve body mechanism in the control box and a monitoring module in the controller, wherein the valve body mechanism includes a plurality of solenoid valves (such as a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve) respectively provided on the first pipeline and the second pipeline.

[0043] Specifically, when the power is on, the monitoring module can monitor the voltage and current values ​​of the valve body mechanism, and when the monitored voltage or current value exceeds the working range of the solenoid valve itself, an alarm signal can be sent to the controller, thereby prompting the staff to troubleshoot the fault more quickly. When the power is off, the resistance value of the valve body mechanism can be monitored separately, and the recorded data can be sent to the monitoring module to determine whether the valve body mechanism has a fault.

[0044] Fourthly, the present invention respectively arranges a third solenoid valve on the first pipeline and a fourth solenoid valve on the first pipeline, and both are connected to the partial stroke monitoring module in the controller. Specifically, the present invention can open the third solenoid valve and the fourth solenoid valve through the partial stroke monitoring module, and inject a small flow of hydraulic oil into the lower space of the cylinder through the fourth solenoid valve to make the valve move to one side for a partial stroke, thereby judging the operating state of the piston and the driving mechanism, so as to ensure that the valve in a non-operating condition for a long time can still have the ability to close in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0046] Figure 1The structure of the valve monitoring device according to the present invention is schematically shown;

[0047] Figure 2 A partial schematic diagram of a driving mechanism in a valve monitoring device according to the present invention;

[0048] Figure 3 It is a schematic structural diagram of a control box in a valve monitoring device according to the present invention.

[0049] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0050] The meanings of the reference numerals in the accompanying drawings are as follows:

[0051] Cylinder 11, upper space 111, lower space 112, piston 12, spring cylinder 13, compression spring 131, first pipeline 14, first solenoid valve 141, third solenoid valve 142, second pipeline 15, second solenoid valve 151, fourth solenoid valve 152, first sensor 16, second sensor 17,

[0052] Driving mechanism 20, worm 21, valve stem 22, worm wheel 23,

[0053] Controller 31, valve opening test module 311, connecting rod 32, monitoring module 33, partial stroke monitoring module 34,

[0054] Valve 40,

[0055] Control box 50 , main body 51 , raised portion 52 , and oil film detector 53 . DETAILED DESCRIPTION

[0056] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0057] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0058] In the present invention, unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0059] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] Figure 1 The structure of the valve monitoring device 100 according to the present invention is schematically shown;

[0062] Figure 2 A partial schematic diagram of the driving mechanism 20 in the valve monitoring device 100 according to the present invention;

[0063] Figure 3 FIG. 1 is a schematic structural diagram of a control box 50 in a valve monitoring device 100 according to the present invention.

[0064] According to a first aspect of the present invention, a valve monitoring device 100 is provided, which includes a drive unit. Figure 1 As shown, the driving unit includes an adjusting mechanism and a driving mechanism 20, which will be described in detail below.

[0065] According to the present invention, Figure 2 As shown, the adjustment mechanism includes a cylinder 11 for containing fluid, a piston 12 and a spring cylinder 13.

[0066] In one embodiment, the piston 12 is disposed inside the cylinder 11, and the outer peripheral surface of the piston 12 is sealedly connected to the inner peripheral surface of the cylinder 11, so that the cylinder 11 can be divided into an upper space 111 and a lower space 112. It is easy to understand that the fluids in the upper space 111 and the lower space 112 cannot flow with each other.

[0067] In one embodiment, the spring cylinder 13 is arranged opposite to the cylinder body 11 , and a compression spring 131 is accommodated in the spring cylinder 13 .

[0068] According to the present invention, Figure 2 As shown, the driving mechanism 20 includes a worm 21 , a valve stem 22 and a worm wheel 23 .

[0069] In one embodiment, the worm 21 is disposed between the piston 12 and the compression spring 131. Preferably, the first end of the worm 21 can be fixedly connected to the piston 12, and the second end of the worm 21 can be fixedly connected to the compression spring 131 in the spring cylinder 13.

[0070] After fluid is injected into the upper space 111 of the cylinder body 11, the piston 12 will move toward the spring cylinder 13 under the action of the fluid. At the same time, the worm 21 moves in the same direction as the piston 12, thereby causing the compression spring 131 to shrink into the spring cylinder 13 to store closing energy.

[0071] After the fluid in the upper space 111 of the cylinder body 11 is released, the piston 12 and the worm 21 will move in a direction away from the spring cylinder 13 under the action of the closing energy (elastic force of the compression spring 131 ).

[0072] In one embodiment, the valve stem 22 and the worm 21 are arranged vertically, and a stable connection relationship can be formed indirectly through the worm gear 23 .

[0073] Specifically, the worm wheel 23 is sleeved outside the valve stem 22, and the worm wheel 23 can form a stable meshing relationship with the worm 21. Therefore, the worm 21 follows the piston 12 to make axial movement, thereby driving the worm wheel 23 to rotate, and then causing the valve stem 22 to rotate.

[0074] Thus, when the piston 12 reciprocates in the cylinder 11, the worm 21 can perform axial reciprocating motion following the piston 12. Since the worm wheel 23 is in meshing relationship with the worm 21, the worm wheel 23 can rotate under the driving action of the worm 21. Since the worm wheel 23 is sleeved on the valve stem 22, the valve stem 22 can rotate under the driving action of the worm wheel 23.

[0075] According to the present invention, Figure 1 As shown, the valve monitoring device 100 further includes a valve monitoring mechanism. The valve monitoring mechanism is disposed above the valve stem 22 and includes a controller 31 and a connecting rod 32 .

[0076] In one embodiment, the connecting rod 32 is disposed between the controller 31 and the valve stem 22 . In other words, the connecting rod 32 can connect the controller 31 and the valve stem 22 together to record the movement stroke of the valve stem 22 in real time.

[0077] According to the present invention, Figure 1 As shown, the valve monitoring device 100 further includes a valve 40. Preferably, the valve 40 is disposed at the free end of the valve stem 22 so as to be able to rotate along with the valve stem 22 to achieve the purpose of opening and closing.

[0078] According to one embodiment of the present invention, after fluid is injected into the upper space 111 of the cylinder body 11, the piston 12 will move toward the spring cylinder 13 under the action of the fluid, and the worm 21 will move together with the piston 12, thereby causing the compression spring 131 to shrink into the spring cylinder 13 to store closing energy. At the same time, the worm wheel 23 will rotate in the first direction under the action of the worm 21 to cause the valve stem 22 to rotate, thereby achieving the purpose of opening the valve 40.

[0079] According to one embodiment of the present invention, after the fluid in the upper space 111 of the cylinder body 11 is released, the piston 12 and the worm 21 will move in a direction away from the spring cylinder 13 under the action of the closing energy (elastic force of the compression spring 131). At the same time, the worm wheel 23 will rotate in the second direction under the action of the worm 21 to cause the valve stem 22 to rotate, thereby closing the valve 40 to perform an emergency shut-off valve action.

[0080] In the present invention, the first direction is the clockwise direction, and the second direction is the counterclockwise direction.

[0081] In another embodiment, the worm gear 23 can also rotate in the second direction to cause the valve stem 22 to rotate, thereby achieving the purpose of opening the valve 40; the worm gear 23 can also rotate in the first direction to cause the valve stem 22 to rotate, thereby closing the valve 40 to perform an emergency shut-off valve action.

[0082] According to a specific embodiment of the present invention, a valve opening test module 311 is provided in the controller 31. Preferably, the valve opening test module 311 is configured to obtain the opening data of the valve 40 according to the rotation stroke of the connecting rod 32.

[0083] In other words, when the valve 40 is actuated, the valve stem 22 drives the connecting rod 32 to move. Therefore, the valve opening degree testing module 311 can determine the opening degree of the valve 40 by recording the rotation angle of the connecting rod 32, so as to achieve the purpose of real-time monitoring of the opening degree of the valve 40, thereby improving the ability to accurately adjust the opening degree of the valve 40.

[0084] According to the present invention, Figure 2 As shown, the regulating mechanism further includes a first pipeline 14 and a second pipeline 15 .

[0085] Preferably, the first pipeline 14 is in communication with the upper space 111 of the cylinder 11 , so that fluid can be injected into the upper space 111 through the first pipeline 14 .

[0086] Preferably, the second pipeline 15 is in communication with the lower space 112 of the cylinder 11 , so that fluid can be injected into the lower space 112 through the second pipeline 15 .

[0087] According to one embodiment of the present invention, after fluid is injected into the upper space 111 of the cylinder 11 through the first pipeline 14, the piston 12 will move toward the spring cylinder 13 under the action of the fluid, thereby causing the fluid in the lower space 112 of the cylinder 11 to be discharged outward through the second pipeline 15, and the worm 21 will move along with the piston 12 to cause the compression spring 131 to contract into the spring cylinder 13 to store closing energy. At the same time, the worm wheel 23 will rotate in the first direction under the action of the worm 21 to cause the valve stem 22 to rotate, thereby achieving the purpose of opening the valve 40.

[0088] According to one embodiment of the present invention, after the fluid in the upper space 111 of the cylinder body 11 is released through the first pipeline 14, the piston 12 and the worm 21 will move in a direction away from the spring cylinder 13 under the action of the closing energy (elastic force of the compression spring 131). At the same time, the worm wheel 23 will rotate in the second direction under the action of the worm 21 to cause the valve stem 22 to rotate, thereby closing the valve 40 to perform an emergency shut-off valve action.

[0089] According to the present invention, Figure 2 As shown, the adjustment mechanism further includes a first sensor 16 and a second sensor 17 .

[0090] Preferably, the first sensor 16 is disposed on the first pipeline 14 , and the fluid pressure value in the upper space 111 of the cylinder 11 can be measured by the first sensor 16 .

[0091] Preferably, the second sensor 17 is disposed on the second pipeline 15 , and the fluid pressure value in the lower space 112 of the cylinder 11 can be measured by the second sensor 17 .

[0092] In a specific embodiment, both the first sensor 16 and the second sensor 17 are connected to the controller 31 , so that the recorded data can be transmitted to the controller 31 more quickly.

[0093] It is easy to understand that when the pressure value of the upper space 111 measured by the first sensor 16 or the pressure value in the lower space 112 measured by the second sensor 17 is lower than 85% to 95% of the normal value, an alarm signal will be sent to the controller 31, thereby prompting the staff to troubleshoot at a faster speed, thereby improving the overall work efficiency and work quality.

[0094] According to the present invention, Figure 3 As shown, the valve monitoring device 100 further includes a control box 50. The control box 50 is sleeved outside the valve stem 22 and is located below the drive mechanism 20. Preferably, the control box 50 is configured to control the drive unit and the valve monitoring mechanism.

[0095] According to the present invention, Figure 1As shown, the monitoring mechanism also includes a valve body mechanism disposed in the control box 50, and a monitoring module 33 disposed in the controller 31. The valve body mechanism includes a plurality of solenoid valves (such as a first solenoid valve 141, a second solenoid valve 151, a third solenoid valve 142, and a fourth solenoid valve 152, which will be described below) disposed on the first pipeline 14 and the second pipeline 15, respectively.

[0096] According to a specific embodiment of the present invention, the monitoring module 33 is configured to monitor the voltage and current values ​​of the valve body mechanism when power is turned on. Furthermore, when the monitored voltage or current value exceeds the working range of the solenoid valve itself, an alarm signal can be sent to the controller 31, thereby prompting the staff to perform troubleshooting at a faster speed, thereby improving the overall work efficiency and work quality.

[0097] According to a specific embodiment of the present invention, the monitoring module 33 is configured to monitor the resistance value of the valve body mechanism when no power is supplied, and send recorded data to the monitoring module 33, so as to determine whether the valve body mechanism has a fault.

[0098] Preferably, the valve body mechanism in the present invention includes a first solenoid valve 141 , a second solenoid valve 151 , a third solenoid valve 142 and a fourth solenoid valve 152 .

[0099] According to the present invention, Figure 2 As shown, the valve body mechanism includes a first solenoid valve 141 and a second solenoid valve 151 .

[0100] Preferably, the first solenoid valve 141 is disposed on the first pipeline 14 , and the opening and closing of the upper space 111 of the cylinder 11 can be controlled by the first solenoid valve 141 .

[0101] Preferably, the second solenoid valve 151 is disposed on the second pipeline 15 , and the opening and closing of the lower space 112 of the cylinder 11 can be controlled by the second solenoid valve 151 .

[0102] In a specific embodiment, both the first solenoid valve 141 and the second solenoid valve 151 are connected to the controller 31 , so as to achieve accurate control of the opening and closing of the upper space 111 or the lower space 112 of the cylinder body 11 .

[0103] According to a specific embodiment of the present invention, the monitoring module 33 is configured to monitor the voltage value and the current value of the first solenoid valve 141 and the second solenoid valve 151 when power is supplied, and when the monitored voltage value or current value exceeds the working range of the first solenoid valve 141 and the second solenoid valve 151, an alarm signal can be sent to the controller 31, thereby prompting the staff to perform troubleshooting; the monitoring module 33 is configured to monitor the resistance value of the first solenoid valve 141 and the second solenoid valve 151 when power is not supplied, and send recorded data to the monitoring module 33 to determine whether there is a fault in the valve body mechanism.

[0104] In one embodiment, the first solenoid valve 141 is farther from the cylinder body 11 than the first sensor 16 .

[0105] In this way, it is ensured that the first solenoid valve 141 can accurately and quickly open and close the upper space 111 of the cylinder body 11, and that the first sensor 16 can accurately measure the fluid pressure value in the upper space 111 of the cylinder body 11, so that the various indicators of the valve 40 can be accurately monitored, thereby improving the working efficiency and work quality of the valve monitoring device 100.

[0106] In one embodiment, the second solenoid valve 151 is farther from the cylinder body 11 than the second sensor 17 .

[0107] In this way, it is ensured that the second solenoid valve 151 can accurately and quickly open and close the lower space 112 of the cylinder body 11, and that the second sensor 17 can accurately measure the fluid pressure value in the lower space 112 of the cylinder body 11, so that the various indicators of the valve 40 can be accurately monitored, thereby improving the working efficiency and work quality of the valve monitoring device 100.

[0108] According to the present invention, Figure 2 As shown, the valve body mechanism further includes a third solenoid valve 142 and a fourth solenoid valve 152 .

[0109] Preferably, the third solenoid valve 142 is disposed on the first pipeline 14 , and the third solenoid valve 142 is arranged in parallel with the first solenoid valve 141 , so as to be able to be used for partial stroke testing.

[0110] Preferably, the fourth solenoid valve 152 is disposed on the second pipeline 15 , and the fourth solenoid valve 152 is arranged in parallel with the second solenoid valve 151 , so as to be able to be used for partial stroke testing.

[0111] In a specific embodiment, the third solenoid valve 142 and the fourth solenoid valve 152 are both connected to the partial stroke monitoring module 34 in the controller 31 to implement a partial stroke test on the valve 40 , thereby ensuring the effectiveness of the valve 40 .

[0112] According to a specific embodiment of the present invention, the monitoring module 33 is configured to monitor the voltage value and the current value of the third solenoid valve 142 and the fourth solenoid valve 152 when power is supplied, and when the monitored voltage value or current value exceeds the working range of the third solenoid valve 142 and the fourth solenoid valve 152, an alarm signal can be sent to the controller 31, thereby prompting the staff to perform troubleshooting; the monitoring module 33 is configured to monitor the resistance value of the third solenoid valve 142 and the fourth solenoid valve 152 when power is not supplied, and send recorded data to the monitoring module 33 to determine whether there is a fault in the valve body mechanism.

[0113] In a preferred embodiment of the present invention, the fluid includes any one of compressed air and hydraulic oil.

[0114] The working principle of the first embodiment (compressed air) of the present invention is introduced below.

[0115] Step 1: Open the first solenoid valve 141 through the control box 50 to allow compressed air to enter the upper space 111 of the cylinder body 11 through the first pipeline 14 .

[0116] Step 2: The piston 12 moves toward the compression spring 131 under the action of the compressed air, thereby discharging the compressed air in the lower space 112 of the cylinder body 11. At the same time, the valve 40 is opened under the driving action of the worm 21, the worm wheel 23 and the valve stem 22 in sequence.

[0117] In step two, when the piston 12 moves toward the compression spring 131 under the action of compressed air, the worm 21 moves synchronously with the piston 12, so that the compression spring 131 can shrink in the spring cylinder 13 under the action of the worm 21 to store closing energy, thereby facilitating the subsequent emergency shut-off valve action.

[0118] Step 3: The first solenoid valve 141 is urged to release the compressed air in the upper space 111 of the cylinder body 11 through the control box 50 .

[0119] Step 4: The piston 12 moves away from the compression spring 131 under the action of the closing energy. At the same time, the valve 40 is closed in sequence under the driving action of the worm 21, the worm wheel 23 and the valve stem 22, thereby realizing the emergency shut-off valve action.

[0120] The working principle of the first embodiment (hydraulic oil) of the present invention is introduced below.

[0121] Step 1: Open the first solenoid valve 141 through the control box 50 to allow the hydraulic oil to enter the upper space 111 of the cylinder body 11 through the first pipeline 14 .

[0122] Step 2: The piston 12 moves toward the compression spring 131 under the action of the hydraulic oil, thereby discharging the hydraulic oil in the lower space 112 of the cylinder body 11. At the same time, the valve 40 is opened under the driving action of the worm 21, the worm wheel 23 and the valve stem 22 in sequence.

[0123] In step two, when the piston 12 moves toward the compression spring 131 under the action of the hydraulic oil, the worm 21 moves synchronously with the piston 12, so that the compression spring 131 can contract in the spring cylinder 13 under the action of the worm 21 to store closing energy, thereby facilitating the subsequent emergency shut-off valve action.

[0124] Step 3: Use the control box 50 to cause the first solenoid valve 141 to release the hydraulic oil in the upper space 111 of the cylinder body 11 .

[0125] Step 4: The piston 12 moves away from the compression spring 131 under the action of the closing energy. At the same time, the valve 40 is closed in sequence under the driving action of the worm 21, the worm wheel 23 and the valve stem 22, thereby realizing the emergency shut-off valve action.

[0126] In a second embodiment of the present invention, Figure 3 As shown, the control box 50 further includes a main body portion 51 and a raised portion 52. Preferably, the main body portion 51 is configured in a cylindrical form, and the raised portion 52 is extended upwardly from the main body portion 51 in the axial direction.

[0127] According to the present invention, Figure 3 As shown, the valve monitoring device further includes three oil film detectors 53. One of the oil film detectors 53 is arranged on the raised portion 52, and the remaining two oil film detectors 53 are arranged on the main body 51 on both sides of the raised portion 52 respectively.

[0128] Preferably, the bottom of the control box 50 is designed to be low-lying, so that the hydraulic oil will accumulate at the bottom of the control box 50. Since the oil film detector 53 is a laser detector, it is easier to detect the oil at the bottom of the control box 50 to obtain accurate information, which helps to determine whether the hydraulic oil is leaking. In addition, when oil leakage is found, an alarm signal can be sent to the controller 31 in a timely manner, so that the staff can be prompted to troubleshoot at a faster speed, thereby improving the overall work efficiency and work quality.

[0129] According to a second aspect of the present invention, a method for using the valve monitoring device 100 as described above is provided, comprising the following steps:

[0130] First, the first solenoid valve 141 is opened through the control box 50 to allow compressed air to enter the upper space 111 through the first pipeline 14 .

[0131] Then, the piston 12 discharges the compressed air in the lower space 112 under the action of the compressed air in the upper space 111 , thereby prompting the worm 21 , the worm wheel 23 and the valve stem 22 in the driving mechanism 20 to move in sequence, so as to achieve the purpose of opening the valve 40 .

[0132] At the same time, under the action of the worm 21, the compression spring 131 is forced to contract in the spring cylinder 13 to store closing energy.

[0133] Afterwards, after the control box 50 receives the emergency shut-off signal, it prompts the first solenoid valve 141 to release the compressed air in the upper space 111. At the same time, the piston 12 moves in the direction away from the compression spring 131 under the action of the closing energy, thereby prompting the worm 21, worm wheel 23 and valve stem 22 in the drive mechanism 20 to move in sequence, so as to achieve the purpose of emergency shut-off valve 40.

[0134] According to a third aspect of the present invention, a method for using the valve monitoring device 100 as described above is provided, comprising the following steps:

[0135] First, the first solenoid valve 141 is opened through the control box 50 to allow the hydraulic oil to enter the upper space 111 through the first pipeline 14 .

[0136] Then, the piston 12 discharges the hydraulic oil in the lower space 112 under the action of the hydraulic oil in the upper space 111 , thereby causing the worm 21 , the worm wheel 23 and the valve stem 22 in the driving mechanism 20 to move in sequence, so as to open the valve 40 .

[0137] At the same time, under the action of the worm 21, the compression spring 131 is forced to contract in the spring cylinder 13 to store closing energy.

[0138] Afterwards, after the control box 50 receives the emergency cut-off signal, it prompts the first solenoid valve 141 to release the hydraulic oil in the upper space 111. At the same time, the piston 12 moves away from the compression spring 131 under the action of the closing energy, thereby prompting the worm 21, worm wheel 23 and valve stem 22 in the drive mechanism 20 to move in sequence, so as to achieve the purpose of emergency cutting off the valve 40.

[0139] In one embodiment, a partial stroke test method is also included:

[0140] The first embodiment (compressed air) is described in detail below.

[0141] First, the third solenoid valve 142 and the fourth solenoid valve 152 are opened respectively by the partial stroke monitoring module 34.

[0142] Then, a small flow of compressed air is injected into the lower space 112 of the cylinder 11 through the fourth solenoid valve 152, and the piston 12 and the drive mechanism 20 are moved in a direction away from the compression spring 131 under the action of the compressed air in the lower space 112 of the cylinder 11, so as to cause the compressed air in the upper space 111 of the cylinder 11 to be discharged outward through the first pipeline 14, so that the valve 40 performs a partial stroke movement to one side, and partially forms a test structure;

[0143] Afterwards, a small flow of compressed air is injected into the upper space 111 of the cylinder 11 through the third solenoid valve 142 to reset the piston 12 and the drive mechanism 20 and to cause the fluid in the lower space 112 of the cylinder 11 to be discharged outward through the second pipeline 15 .

[0144] The second embodiment (hydraulic oil) is described in detail below.

[0145] First, the third solenoid valve 142 and the fourth solenoid valve 152 are opened respectively by the partial stroke monitoring module 34.

[0146] Then, a small flow of hydraulic oil is injected into the lower space 112 of the cylinder 11 through the fourth solenoid valve 152. Under the action of the hydraulic oil in the lower space 112 of the cylinder 11, the piston 12 and the drive mechanism 20 move in a direction away from the compression spring 131, so as to cause the hydraulic oil in the upper space 111 of the cylinder 11 to be discharged outward through the first pipeline 14.

[0147] Afterwards, a small flow of hydraulic oil is injected into the upper space 111 of the cylinder body 11 through the third solenoid valve 142 to reset the piston 12 and the drive mechanism 20, and to cause the fluid in the lower space 112 of the cylinder body 11 to be discharged outward through the second pipeline 15 to reset the valve 40.

[0148] It is easy to understand that the valve 40 (emergency shut-off valve) will only be activated when it is shut off in an emergency. Since the valve 40 is easily blocked when it is not in operation for a long time, it is very easy to fail to achieve the valve closing effect in an emergency. Therefore, the present invention is conducive to timely discovering the hidden dangers of the valve 40 through the partial stroke test, so that emergency repair and troubleshooting can be carried out more quickly.

[0149] It is worth noting that the small flow rate described in the present invention is in the range of 2% to 8% of the total flow rate that drives the valve 40 to move through its full stroke.

[0150] Since the third solenoid valve 142 and the fourth solenoid valve 152 are both opened at a small flow rate when the partial stroke test is performed, the valve 40 only needs to move slightly. It is easy to understand that the partial stroke test will not affect the normal operation of the pipeline (the first pipeline 14 or the second pipeline 15).

[0151] Compared with the prior art, the present invention has the following advantages:

[0152] First, the present invention is provided with a valve opening test module 311, so that the rotation of the valve stem 22 can be indirectly recorded according to the rotation stroke of the connecting rod 32, so as to obtain the opening information of the valve 40 in real time, and then the opening and closing of the valve 40 can be accurately adjusted to improve the safety of the use of the valve 40.

[0153] Secondly, the present invention respectively sets a first sensor 16 on the first pipeline 14 and a second sensor 17 on the second pipeline 15, so as to realize recording and monitoring of the pressure (compressed air or hydraulic oil) in the upper space 111 and the lower space 112 of the cylinder body 11. Moreover, when the pressure value in the upper space 111 or the lower space 112 is lower than the set value, an alarm signal will be sent to the controller 31, so as to prompt the staff to perform troubleshooting at a faster speed, so as to improve the working efficiency and working quality of the valve monitoring device 100.

[0154] Third, the present invention is provided with a valve body mechanism in the control box 50, and a monitoring module 33 in the controller 31. The valve body mechanism includes a plurality of solenoid valves (such as a first solenoid valve 141, a second solenoid valve 151, a third solenoid valve 142 and a fourth solenoid valve 152) respectively provided on the first pipeline 14 and the second pipeline 15.

[0155] Specifically, when the power is on, the monitoring module 33 can monitor the voltage and current values ​​of the valve body mechanism, and when the monitored voltage or current value exceeds the working range of the solenoid valve itself, an alarm signal can be sent to the controller 31, thereby prompting the staff to troubleshoot the fault at a faster speed. When the power is off, the resistance value of the valve body mechanism can be monitored separately, and the recorded data can be sent to the monitoring module 33 to determine whether the valve body mechanism has a fault.

[0156] Fourthly, the present invention respectively sets a third solenoid valve 142 on the first pipeline 14 and a fourth solenoid valve 152 on the first pipeline 14, and both are connected to the partial stroke monitoring module 34 in the controller 31. Specifically, the present invention can open the third solenoid valve 142 and the fourth solenoid valve 152 through the partial stroke monitoring module 34, and inject a small flow of hydraulic oil into the lower space 112 of the cylinder body 11 through the fourth solenoid valve 152 to make the valve 40 move to one side for a partial stroke, thereby judging the operating status of the piston 12 and the driving mechanism 20, so as to ensure that the valve 40 in a non-operating state for a long time can still have the ability to close in an emergency.

[0157] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the disclosure scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A valve monitoring device, comprising: A drive unit comprising an adjustment mechanism and a drive mechanism (20), wherein The regulating mechanism comprises a cylinder (11) for containing a fluid, a piston (12) arranged in the cylinder (11), and a spring cylinder (13) arranged opposite to the cylinder (11) and containing a compression spring (131); The driving mechanism comprises a worm (21) arranged between the piston (12) and the compression spring (131), a valve stem (22) vertically distributed with the worm (21), and a worm wheel (23) meshing with the worm (21) and sleeved on the outside of the valve stem (22). A valve monitoring mechanism is arranged above the valve stem (22), comprising a controller (31), and a connecting rod (32) arranged between the controller (31) and the valve stem (22), and A valve (40) is provided at the free end of the valve stem (22), Wherein, a valve opening test module (311) is provided in the controller (31), and the valve opening test module (311) is configured to obtain opening data of the valve (40) according to the rotation stroke of the connecting rod (32).

2. The valve monitoring device according to claim 1, characterized in that: The valve monitoring device also includes a control box (50) arranged on the valve stem (22) and below the drive mechanism, wherein the control box (50) is configured to control the drive unit and the valve monitoring mechanism, and includes a main body (51) configured in a cylindrical form, and a protruding portion (52) extending radially outward from the main body (51).

3. The valve monitoring device according to claim 2, characterized in that: The valve monitoring device further comprises three oil film detectors (53), one of which is arranged on the raised portion (52), and the other two oil film detectors (53) are arranged on the main body (51) on both sides of the raised portion (52). The oil film detector (53) is configured to send an alarm to the controller (31) when hydraulic oil leakage is detected.

4. The valve monitoring device according to claim 3, characterized in that: The outer peripheral surface of the piston (12) is sealedly connected to the inner peripheral surface of the cylinder (11) to divide the cylinder (11) into an upper space (111) and a lower space (112). The regulating mechanism further comprises a first pipeline (14) for delivering fluid to the upper space (111), and a second pipeline (15) for receiving fluid from the lower space (112).

5. The valve monitoring device according to claim 4, characterized in that: A first sensor (16) and a second sensor (17) for measuring the fluid pressure in the upper space (111) and the lower space (112) are respectively provided on the first pipeline (14) and the second pipeline (15); the first sensor (16) and the second sensor (17) are both connected to the controller (31). The first sensor (16) and the second sensor (17) are both configured to send an alarm to the controller (31) when the detected pressure value is lower than 85% to 95% of the normal value, so as to prompt the user to perform troubleshooting.

6. The valve monitoring device according to claim 5, characterized in that: The fluid includes any one of hydraulic oil and compressed air.

7. The valve monitoring device according to claim 6, characterized in that: The valve monitoring device further comprises a valve body mechanism arranged in the control box (50), and a monitoring module (33) arranged in the controller (31). The monitoring module (33) is configured to monitor the voltage value and the current value of the valve body mechanism when power is turned on, and to send an alarm to the controller (31) when the detected voltage value and the current value exceed the working range of the valve body mechanism; The monitoring module (33) is configured to monitor the resistance value of the valve body mechanism when no power is supplied, and to determine the working condition of the valve body mechanism based on the detected resistance value.

8. The valve monitoring device according to claim 7, characterized in that: The valve body mechanism comprises a first solenoid valve (141) provided on the first pipeline (14) and used to control the opening and closing of the upper space (111), and a second solenoid valve (151) provided on the second pipeline (15) and used to control the opening and closing of the lower space (112).

9. The valve monitoring device according to claim 8, characterized in that: The first solenoid valve (141) is farther from the cylinder body (11) than the first sensor (16); and the second solenoid valve (151) is farther from the cylinder body (11) than the second sensor (17).

10. The valve monitoring device according to claim 9, characterized in that: The valve body mechanism further comprises a third solenoid valve (142) for stroke testing, which is arranged on the first pipeline (14) and connected in parallel with the first solenoid valve (141), and a fourth solenoid valve (152) for stroke testing, which is arranged on the second pipeline (15) and connected in parallel with the second solenoid valve (151). Both the third solenoid valve (142) and the fourth solenoid valve (152) are connected to a partial stroke monitoring module (34) in the controller (31).

11. A method for using the valve monitoring device according to any one of claims 1 to 10, comprising the following steps: S1. Opening the first solenoid valve (141) through the control box (50) to allow compressed air to enter the upper space (111) through the first pipeline (14), thereby pushing the piston (12) to discharge the compressed air in the lower space (112) to open the valve (40) under the action of the driving mechanism, and storing closing energy by causing the compression spring (131) to contract in the spring cylinder (13); S2. The control box (50) causes the first solenoid valve (141) to release the compressed air in the upper space (111), and the piston (12) moves in a direction away from the compression spring (131) under the action of the closing energy to close the valve (40) under the action of the driving mechanism.

12. A method for using the valve monitoring device according to any one of claims 1 to 10, comprising the following steps: S1. Opening the first solenoid valve (141) through the control box (50) to allow hydraulic oil to enter the upper space (111) through the first pipeline (14), thereby pushing the piston (12) to discharge the hydraulic oil in the lower space (112) to open the valve (40) under the action of the driving mechanism, and storing closing energy by causing the compression spring (131) to contract in the spring cylinder (13); S2. The control box (50) causes the first solenoid valve (141) to release the hydraulic oil in the upper space (111), and the piston (12) moves in a direction away from the compression spring (131) under the action of the closing energy, so as to close the valve (40) under the action of the driving mechanism.

13. The method of use according to claim 11 or 12, characterized in that: Also included is a partial stroke test method: The third solenoid valve (142) and the fourth solenoid valve (152) are opened respectively by the partial stroke monitoring module (34), A small flow of fluid is injected into the lower space (112) through the fourth solenoid valve (152), and the piston (12) and the driving mechanism both move in a direction away from the compression spring (131) under the action of the fluid in the lower space (112), thereby causing the fluid in the upper space (111) to be discharged outward through the first pipeline (14), so that the valve (40) performs a partial stroke movement to one side, and the partial stroke test ends; A small flow of fluid is injected into the upper space (111) through the third solenoid valve (142) to reset the piston (12) and the drive mechanism and to cause the fluid in the lower space (112) to be discharged outward through the second pipeline (15) to reset the valve (40).

14. The method of use according to claim 13, characterized in that: The small flow rate fluid accounts for 2% to 8% of the total flow rate that drives the valve (40) to move through its full stroke.

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