End face sealed groove valve and valve self-checking method

Abstract

The present invention discloses a groove valve with end face sealing and a valve self-inspection method, which relate to the field of valve technology. The valve body comprises a valve body, a driving member, a support rod, a valve stem and a control system, wherein a valve plate assembly is arranged in the valve body, and the valve stem is driven to rotate by the driving member, and the valve plate assembly is driven to rotate when the valve stem rotates. The present invention is provided with a valve plate assembly, and when the deformation of the first plate body in the working state reaches the maximum deformation of the first plate body in the working state set by the system, when the valve is closed again, the control system controls the driving member to adjust the valve plate assembly to rotate according to the experimental rotation angular velocity of the valve plate assembly when the first plate body is at the minimum deformation in the experimental state under the current flow rate, thereby reducing the impact force of the first plate body, and further preventing the first plate body from being deformed by the strong impact of the fluid again, and causing leakage problems such as poor sealing of the valve plate assembly, thereby facilitating the stable operation of the maintenance system and reducing the downtime and maintenance costs caused by equipment failure.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a groove valve with end face sealing and a valve self-inspection method. Background Art

[0002] Grooved valves are valves that use clamp connections. They have significant advantages such as light switching, reliable sealing, good elastic memory, and long service life. They are quick, easy, safe, reliable, not limited by installation sites, and easy to maintain pipes and valves. They have vibration and sound insulation, and can overcome the deviation caused by different axes of pipe connections within a certain angle range, and solve the thermal expansion and contraction caused by temperature differences.

[0003] The Chinese invention patent, application publication number CN118564710A, discloses a densified groove valve with rubber seals inside the valve body and at both ends. The invention helps to improve the sealing degree when connected to the pipeline and the secondary disassembly does not damage the valve body or affect the deformation. At the same time, the water flow flushing on the sealing sleeve can protect the inner wall of the valve body and the sealing rubber surface from falling off.

[0004] The Chinese invention patent, application publication number CN114719028A, discloses a pipe clamp type groove butterfly valve, which facilitates the direct connection between the groove butterfly valve and the groove pipeline, improves the installation efficiency of the groove butterfly valve, reduces the installation space of the groove butterfly valve, and reduces the cost of the groove butterfly valve pipeline connection.

[0005] For another example, the Chinese invention patent, application publication number CN117145988A, discloses a butterfly valve sealing structure. By setting positive and negative inclination angles on the annular sealing channel, a torsion seal is used to replace the traditional elastic seal when the sealing ring and the butterfly plate are sealed with the annular sealing channel, thereby greatly improving the sealing effect and sealing performance of the butterfly valve, making it less likely for the butterfly valve to leak during use, thereby improving the safety of the butterfly valve during use.

[0006] The above-mentioned prior art and existing butterfly valves still have at least some defects in practical applications, such as:

[0007] When a butterfly valve installed in a large flow pipeline is closed, the fluid will generate an impact force on the valve plate, which may cause the valve plate to deform. When the butterfly valve is opened and closed for a long time and as the deformation of the valve plate gradually increases, the sealing between the valve plate and the valve body will be reduced due to the excessive deformation. The existing technology and existing butterfly valves generally do not detect the deformation of the valve plate. As a result, it is impossible to promptly discover and take measures in the early stage of valve plate deformation, and it is impossible to effectively avoid the subsequent leakage caused by reduced sealing, which is not conducive to the stable operation of the maintenance system and increases the downtime and maintenance costs caused by equipment failure.

[0008] When the existing groove valve is connected to the pipeline, a sealing gasket is connected between the pipeline end face and the valve end face. It is difficult to detect the sealing structure between the two with the existing technology and the existing butterfly valve. When the sealing structure ages and the staff cannot handle it in time, it is easy to cause water leakage. Summary of the invention

[0009] The object of the present invention is to provide a groove valve with end face sealing and a valve self-inspection method to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a groove valve with end face sealing and a valve self-inspection method, comprising a valve body, a driving member, a support rod, a valve stem and a control system, wherein a valve plate assembly is arranged in the valve body, and the valve stem is driven to rotate by the driving member, and the valve plate assembly is driven to rotate when the valve stem rotates, so as to adjust the opening and closing degree between the valve plate assembly and the valve body, thereby adjusting the flow rate of the fluid flowing in the valve body;

[0011] The valve plate assembly includes a valve seat and a second plate body, the valve seat is adapted to the valve stem, the second plate body is located on the side of the valve body liquid outlet, a mounting groove is provided on the second plate body facing the liquid inlet side, a depression detection assembly is fixed in the mounting groove, a first plate body is fixed on the opposite side of the second plate body, and the depression detection assembly is sealed and installed between the first plate body and the second plate body;

[0012] The dent detection assembly includes a mounting plate and a plurality of detection components, and the detection components are integrated and mounted on the side of the mounting plate;

[0013] Each detection component includes a resistance wire, and the resistance value of the resistance wire of each detection component is different;

[0014] The depression amount and depression position of the first plate are detected by a depression detection component, and the depression detection component is electrically connected to the control system;

[0015] Sealing rubber rings are arranged on the inner walls of both sides of the valve body, and both sides of the sealing rubber rings extend out of the two end faces of the valve body to form sealing gaskets;

[0016] A rubber ring detection component is arranged on the side of the valve body, and the sealing performance of the sealing gasket is detected by the rubber ring detection component.

[0017] Furthermore, each of the detection elements comprises two wires, a groove is provided on the side of the mounting plate, a fixing block is fixed on the top of the groove, and the resistance wire is movably arranged in the middle of the fixing block;

[0018] A deformation component is arranged on the side of the resistance wire, and after a depression appears on the surface of the first plate body, the length of the resistance wire is changed by the deformation component.

[0019] Furthermore, the deformation component includes a top conductive block and a bottom conductive block respectively fixed to both ends of the resistance wire, and two wires are respectively fixed to the top conductive block and the bottom conductive block;

[0020] A fixing seat is fixed on the top of the fixing block, and the fixing seat is fixed to the top of the resistance wire;

[0021] A plurality of pressure-bearing rods are fixed to the top of the bottom conductive block, the pressure-bearing rods are movably plugged with the fixed block, the top surface of the pressure-bearing rods is higher than the top surface of the top conductive block, a pressure-bearing plate is fixed to the top of the pressure-bearing rods, and the top surface of the pressure-bearing plate contacts the back surface of the first plate body;

[0022] A gap is formed between the bottom conductive block and the bottom wall of the groove.

[0023] Furthermore, the spacing is 1-6 mm.

[0024] Furthermore, the rubber ring detection components are provided in a plurality of groups, and each group of rubber ring detection components is symmetrically arranged on both sides of the valve body;

[0025] The rubber ring detection assembly includes a detection groove provided on the valve body, a movable rod is movably inserted on the outer side of the valve body along the center axis of the valve body, an extrusion sheet is provided between the sealing gasket and the end face of the valve body, and the extrusion sheet is fixed to one end of the movable rod;

[0026] A magnetic block is fixed on the rod body of the movable rod extending into the detection slot, and an electromagnet and a distance measuring piece are fixed on both sides of the detection slot. When the electromagnet is energized, it attracts the magnetic block and drives the movable rod to move to the outside of the valve body;

[0027] The distance between the end of the movable rod extending into the detection slot and the distance measuring member is detected by the distance measuring member, and the electromagnet and the distance measuring member are both electrically connected to the control system.

[0028] Furthermore, the rubber ring detection assembly includes a transverse through hole opened on the outside of the valve body, the transverse through hole is arranged along the axial direction of the valve body, and the transverse through hole passes through the valve body;

[0029] The outside of the valve body is connected to a flow meter through a first connecting pipe, a pressure sensor is connected to the pipe wall of the first connecting pipe, a pressure relief pipe is fixedly connected to the pipe body of the first connecting pipe, and a pressure relief valve is connected to the pipe body of the pressure relief pipe;

[0030] The outside of the flow meter is connected to a booster pump through a second connecting pipe, and a solenoid valve is connected to the pipe body of the second connecting pipe.

[0031] A valve self-checking method, applied to the groove valve with end face sealing, comprises the following methods:

[0032] S1: Establish a corresponding objective function based on the elongation, resistance value and change resistance value of the resistance wire in each dent detection component, and establish a sealing gasket early warning model;

[0033] S2: Acquire test data, including seal gasket test data and resistance value data of resistance wire when the valve is closed;

[0034] S3: Acquire experimental data, where the experimental data is the experimental rotation angular velocity of the valve plate assembly when the first plate body is at the minimum deformation amount under the experimental state when the valve is closed at different flow rates of the fluid;

[0035] S4: inputting the acquired resistance value data of the resistance wire into the corresponding target function to determine the deformation amount of the resistance wire, thereby determining the deformation amount and deformation position of the first plate body under the working state outside the resistance wire, and transmitting the deformation amount and deformation position to the control system;

[0036] The seal inspection data is also transmitted to the control system.

[0037] Furthermore, the control system compares the deformation of the first plate body under the working state obtained in S with the maximum deformation of the first plate body under the working state. When the deformation of the first plate body under the working state reaches the maximum deformation of the first plate body under the working state set by the system, when the valve is closed again, the control system controls the driving member to adjust the valve plate assembly to rotate at the current flow rate according to the experimental rotational angular velocity of the valve plate assembly when the first plate body is at the minimum deformation under the experimental state.

[0038] Furthermore, the method for determining the detection data of the sealing gasket is that the control system controls the electromagnet to be energized regularly, the electromagnet generates suction force on the magnetic conductive block, and the movable rod drives the extrusion sheet to move outward, thereby squeezing the sealing gasket;

[0039] After 2-5 seconds, the control system controls the electromagnet to cut off the power, and the movable rod moves inward under the rebound force of the sealing pad, and the distance measuring component detects the rebound distance of the movable rod;

[0040] When the rebound distance of the movable rod is less than the minimum value set by the early warning model, the control system controls the alarm to sound an alarm.

[0041] Furthermore, the method for determining the gasket detection data is that the control system controls the booster pump to pump gas into the transverse through hole regularly, and when the amount of air flowing in the flow meter reaches a set value, the control system controls the booster pump and the solenoid valve to close;

[0042] When the air pressure sensor detects that the air pressure in the transverse through hole is greater than the maximum value set by the warning model, the control system controls the alarm to sound an alarm;

[0043] The pressure is maintained for 60-300 seconds. During the pressure maintenance time, the air pressure sensor detects the air pressure in the transverse through hole in real time. When the pressure reduction rate reaches the maximum value set by the early warning model, the control system controls the alarm to sound an alarm.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The end-face sealed groove valve and valve self-inspection method are provided with a valve plate assembly. When the deformation of the first plate body in the working state reaches the maximum deformation of the first plate body in the working state set by the system, when the valve is closed again, the control system controls the driving member to adjust the valve plate assembly to rotate according to the experimental rotation angular velocity of the valve plate assembly when the first plate body is at the minimum deformation in the experimental state under the current flow rate, thereby reducing the impact force of the first plate body, thereby preventing the first plate body from being deformed again by the strong impact of the fluid, resulting in leakage problems such as poor sealing of the valve plate assembly, thereby facilitating the stable operation of the maintenance system and reducing the downtime and maintenance costs caused by equipment failure.

[0046] Secondly, the control system controls the driving member to drive the valve plate assembly to rotate in the opposite direction. When the opening and closing degree between the valve plate assembly and the valve body reaches the set value, the valve plate assembly stops rotating. In this way, the second plate body faces the fluid side, that is, it bears the fluid pressure, avoiding adverse effects of emergency valve closure in production.

[0047] Furthermore, since the deformation position of the first plate body can be located, the surface thickness of the first plate body at the corresponding position can be increased during manufacturing, thereby increasing the service life of the valve while minimizing the weight of the valve and the production cost.

[0048] In addition, a rubber ring detection component is also provided, through which the sealing rubber rings connected to both sides of the valve body are detected, so as to promptly find out whether the sealing rubber rings are aging, and then remind the staff to deal with them in time to avoid damage caused by pipeline leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a left side axial view of the first embodiment of the present invention;

[0050] Figure 2 It is a right rear axial view of the first embodiment of the present invention;

[0051] Figure 3 is an exploded view of the valve plate assembly of the present invention;

[0052] Figure 4 A half-section diagram of a sag detection assembly of the present invention;

[0053] Figure 5 A half-section view of the rubber ring detection assembly in the first embodiment of the present invention;

[0054] Figure 6 It is a left side axial view of a second embodiment of the present invention;

[0055] Figure 7 It is a half-section view of the rubber ring detection assembly in the second embodiment of the present invention.

[0056] In the figure: 1, valve body; 2, valve plate assembly; 201, valve seat; 202, second plate; 203, mounting groove; 3, driving member; 4, support rod; 5, sealing rubber ring; 6, valve stem; 7, depression detection assembly; 701, mounting plate; 702, fixing block; 703, resistance wire; 704, top conductive block; 705, bottom conductive block; 706, fixing seat; 707, pressure plate; 708, pressure rod; 709, wire; 8, first plate; 9, first lead groove; 10, second lead groove; 111, movable rod; 112, extrusion sheet; 113, distance measuring member; 114, magnetic conductive block; 115, electromagnet; 121, transverse through hole; 123, flow meter; 124, pressure relief pipe; 125, pressure relief valve; 126, booster pump; 127, solenoid valve; 128, air pressure sensor. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The valve in this solution is a grooved butterfly valve, and both sides of the valve are connected to the fluid flow pipeline by means of clamp connections.

[0059] like Figure 1-Figure 7 As shown, the present invention provides a technical solution: a groove valve with end face sealing and a valve self-inspection method, comprising a valve body 1, a driving member 3, a support rod 4, a valve stem 6 and a control system, wherein the valve body 1 and the valve stem 6 are both made of copper material, a valve plate assembly 2 is arranged in the valve body 1, and the valve stem 6 is driven to rotate by the driving member 3, and the valve plate assembly 2 is driven to rotate when the valve stem 6 rotates, so as to adjust the opening and closing degree between the valve plate assembly 2 and the valve body 1, and then to adjust the flow rate of the fluid flowing in the valve body 1, and in addition, in order to ensure that the valve can still be controlled when the driving member 3 is damaged, the power is cut off or in an emergency state, a hand wheel is also arranged on one side of the top of the valve body 1, and the valve stem 6 is driven to rotate by rotating the hand wheel, so as to manually adjust the opening and closing degree between the valve plate assembly 2 and the valve body 1.

[0060] like Figure 1 and Figure 3As shown, the valve plate assembly 2 includes a valve seat 201 and a second plate body 202. The second plate body 202 can be integrally formed with the valve seat 201, or can be welded and fixed to both sides of the valve seat 201. The plug hole opened in the middle of the valve seat 201 is adapted to the valve stem 6, that is, when the valve stem 6 is rotated, the valve seat 201 can be driven to rotate, thereby realizing the rotation of the second plate body 202. It should be noted that in this solution, the second plate body 202 is located on the side of the liquid outlet of the valve body 1, and a semicircular mounting groove 20 is opened on the plate body of the second plate body 202 facing the liquid inlet. 3. A first plate body 8 matching the mounting groove 203 is fixed on the opposite side of the second plate body 202, and the depression detection component 7 is sealed and installed between the first plate body 8 and the second plate body 202. Specifically, during installation, the depression detection component 7 is installed in the mounting groove 203, and then the first plate body 8 and the second plate body 202 are fixed by a plurality of screws. It should be understood that since the first plate body 8 is located on the side of the liquid inlet, when the valve is closed, the fluid will impact the surface of the first plate body 8, which may cause a depression on the surface of the first plate body 8.

[0061] like Figure 3 and Figure 4 As shown, the recess detection component 7 includes a mounting plate 701 adapted to the mounting groove 203 and a plurality of detection components in an arc-shaped array, and the detection components are integrated and installed on the side of the mounting plate 701. That is, in this solution, the recess detection component 7 is a separate module integrating the above-mentioned detection components, so that it is not only convenient to install the valve, but also can be manufactured on an assembly line, thereby reducing the manufacturing cost of the valve.

[0062] Specifically, Figure 4As shown, each detection component includes a resistance wire 703 and two wires 709 arranged on both sides of the resistance wire 703. The two wires 709 are connected to an external circuit. The resistance value of the resistance wire 703 can be measured by a resistance measuring instrument on the external circuit. In this solution, the resistance wire 703 is made of tungsten resistance wire, constantan wire or nickel-chromium wire with good ductility. The resistance value of the resistance wire 703 of each detection component is different. A groove is provided on the side of the mounting plate 701, and a fixing block 702 is fixed on the top of the groove. The resistance wire 703 is movably arranged in the middle of the fixing block 702. In order to facilitate the wiring of the recessed detection component 7, a first lead groove 9 is opened between the mounting groove 203 and the socket of the valve seat 201. A wire hole is provided in the middle of the valve stem 6 that is inserted into the socket, and a second lead groove 10 is provided on the side of the valve stem 6 relative to the first lead groove 9. All lead groups connected to the depression detection component 7 are introduced into the second lead groove 10 through the first lead groove 9, and then electrically connected to the external circuit. The resistance value of the resistance wire 703 is displayed on the display of the control system. The display can be set in the control room of the factory. A deformation component is provided on the side of the resistance wire 703. When a depression appears on the surface of the first plate body 8, the length of the resistance wire 703 is changed by the deformation component. In this solution, when a depression appears on the surface of the first plate body 8, the resistance wire 703 is stretched, thereby increasing the resistance value of the resistance wire 703.

[0063] Specifically, the deformation component includes a top conductive block 704 and a bottom conductive block 705 respectively fixed at both ends of the resistance wire 703, two wires 709 are respectively fixed to the top conductive block 704 and the bottom conductive block 705, a fixing seat 706 is fixed to the top of the fixing block 702, and the fixing seat 706 is fixed to the top of the resistance wire 703, and a plurality of pressure rods 708 in a circumferential array are fixed to the top of the bottom conductive block 705, and the pressure rods 708 are movably plugged with the fixing block 702. In this solution, the number of the pressure rods 708 is not less than three, and the pressure rods 708 is made of ceramic or silicon carbide material with relatively high hardness. To prevent the top conductive block 704 from interfering with the movement of the pressure rod 708, the top surface of the pressure rod 708 is higher than the top surface of the top conductive block 704. A pressure plate 707 is fixed to the top of the pressure rod 708, and the top surface of the pressure plate 707 is in contact with the back surface of the first plate body 8. To prevent the groove from interfering with the movement of the bottom conductive block 705, that is, to ensure that the resistance wire 703 has sufficient free deformation, a spacing is formed between the bottom conductive block 705 and the bottom wall of the groove, and the spacing is set to 1-6mm.

[0064] The depression amount and depression position of the first plate 8 are detected by the depression detection component 7, and the depression detection component 7 is electrically connected to the control system.

[0065] It should be noted that, in this solution, each detection component can be positioned by a locator at a corresponding position, that is, the position of each detection component corresponds to the detection component one by one, and the positioning information is transmitted to the control system. The control system establishes a three-dimensional coordinate system proportional to the contour of the first plate body 8 according to the position information, and intuitively displays the installation positions of all detection components. Since the resistance value of the resistance wire 703 of each detection component is different, a corresponding target function is established according to the physical properties such as the elongation, resistance value and change resistance value of each resistance wire 703. When the outer side of the first plate body 8 is dented due to impact, the pressure plate 707 will move synchronously, and the pressure plate 707 will contact the bottom conductive block 705. An extrusion force is generated to pull the bottom wire of the resistance wire 703, so that the resistance wire 703 is stretched. When the resistance wire 703 is stretched, the resistance value of the resistance wire 703 will change. The difference between the changed resistance value and the initial resistance value is the variable resistance value. Since each target function has a specific variable resistance value range, the control system compares the above-mentioned variable resistance value with the variable resistance value range in the corresponding target function. If the variable resistance value is within the variable resistance value range in the corresponding target function, it can be determined that the resistance wire 703 at the corresponding position is deformed, and then the deformation position and deformation amount of the first plate 8 are judged and displayed in the three-dimensional coordinate system.

[0066] In this solution, a pressure sensor can also be set between each pressure plate 707 and the first plate body 8. The pressure sensor is electrically connected to the control system. When the first plate body 8 is deformed, the pressure sensor at the corresponding position will produce a pressure change, and the pressure signal is transmitted to the control system. The deformed position of the pressure plate 707 is then displayed in the three-dimensional coordinate system. As described above, the changed resistance value is substituted into the objective function to calculate the deformation of the resistance wire 703 at that position, and then the deformation of the first plate body 8 is determined.

[0067] like Figure 1 , Figure 5 and Figure 6 As shown, sealing rubber rings 5 ​​are provided on the inner walls on both sides of the valve body 1. The sealing rubber rings 5 ​​can be made of rubber such as nitrile rubber, EPDM rubber or silicone rubber. Both sides of the sealing rubber ring 5 extend out of the two end faces of the valve body 1 to form a sealing gasket. Several groups of rubber ring detection components are provided on the side of the valve body 1. Each group of rubber ring detection components is symmetrically arranged on both sides of the valve body 1. The sealing performance of the sealing gasket is detected by the rubber ring detection components.

[0068] In the first embodiment of this solution, Figure 5As shown, the rubber ring detection assembly includes a detection groove opened on the valve body 1, a movable rod 111 is movably inserted along the central axis direction of the valve body 1 on the outer side of the valve body 1, an extrusion sheet 112 is arranged between the sealing gasket and the end face of the valve body 1, and the extrusion sheet 112 is fixed to one end of the movable rod 111, and a magnetic conductive block 114 is fixed on the rod body of the movable rod 111 extending into the detection groove, and an electromagnet 115 and a distance measuring member 113 are respectively fixed on both sides of the detection groove, and the electromagnet 115 and the distance measuring member 113 are respectively arranged as follows Figure 5 At the left and right end faces of the detection slot shown in the figure, when the electromagnet 115 is energized, it is attracted to the magnetic block 114. Driven by the attraction, the movable rod 111 moves toward the outside of the valve body 1. At this time, the extrusion sheet 112 forms an extrusion force on the inner side of the sealing gasket. When the electromagnet 115 is de-energized, the movable rod 111 moves to the right side under the action of the rebound force of the sealing gasket. The distance between the end of the movable rod 111 extending into the detection slot and the distance measuring component 113 is detected by the distance measuring component 113. The on and off of the electromagnet 115 is controlled by the control system, and the distance detected by the distance measuring component 113 is transmitted to the control system in real time.

[0069] The specific implementation method is as follows.

[0070] In the second embodiment of this solution, Figure 6 and Figure 7 As shown, the rubber ring detection component includes a transverse through hole 121 opened on the outside of the valve body 1, the transverse through hole 121 is arranged along the axial direction of the valve body 1, and the transverse through hole 121 passes through the valve body 1, a flow meter 123 is connected to the outside of the valve body 1 through a first connecting pipe, an air pressure sensor 128 is connected to the tube wall of the first connecting pipe, a pressure relief pipe 124 is fixedly connected to the tube body of the first connecting pipe, a pressure relief valve 125 is connected to the tube body of the pressure relief pipe 124, a boost pump 126 is connected to the outside of the flow meter 123 through a second connecting pipe, and a solenoid valve 127 is connected to the tube body of the second connecting pipe.

[0071] When the boost pump 126 is started, external air will be pumped into the transverse through hole 121. Since the transverse through hole 121 passes through the valve body 1, the air pressure in the transverse through hole 121 squeezes the inner surface of the sealing gasket. Under this squeezing force, the sealing gasket will be deformed.

[0072] Likewise, the specific implementation method is described below.

[0073] The present invention also discloses a valve self-checking method, which is applied to the above-mentioned groove valve with end face sealing, and includes the following methods:

[0074] S1: establishing a corresponding objective function based on the elongation, resistance value and change resistance value of the resistance wire 703 in each dent detection component 7, and establishing a sealing gasket early warning model;

[0075] S2: Acquire detection data, including detection data of the sealing gasket and data on the resistance value of the resistance wire 703 when the valve is closed;

[0076] S3: Acquire experimental data, which are experimental rotation angular velocities of the valve plate assembly 2 when the first plate body 8 is at a minimum deformation under experimental conditions when the valve is closed at different flow rates of the fluid. Those skilled in the art can obtain the experimental data through a limited number of experiments;

[0077] S4: inputting the acquired resistance value data of the resistance wire 703 into the corresponding target function, determining the deformation amount of the resistance wire 703, thereby determining the deformation amount and deformation position of the first plate 8 in the working state outside the resistance wire 703, and transmitting the deformation amount and deformation position to the control system;

[0078] The seal inspection data is also transmitted to the control system.

[0079] Specifically, the control system compares the deformation of the first plate 8 under the working state obtained in S4 with the maximum deformation of the first plate 8 under the working state. The maximum deformation of the first plate 8 is the maximum deformation allowed under the working state of the valve, which is determined by the manual or engineering personnel. When the deformation of the first plate 8 under the working state reaches the maximum deformation of the first plate 8 under the working state set by the system, the control system will generate the following response:

[0080] 1. When the valve is closed again, in order to prevent the first plate body 8 from being deformed again by the strong impact of the fluid, resulting in a poor seal of the valve plate assembly 2, the control system controls the driving member 3 to adjust the valve plate assembly 2 to rotate at the current flow rate according to the experimental rotation angular velocity of the valve plate assembly 2 when the first plate body 8 is at the minimum deformation under the experimental state, thereby reducing the impact force of the first plate body 8. The control system alarms the staff through the alarm system, and the staff replaces the movable valve plate assembly 2 of the valve.

[0081] 2. The control system controls the driving member 3 to drive the valve plate assembly 2 to rotate in the opposite direction. When the opening and closing degree between the valve plate assembly 2 and the valve body 1 reaches the set value, the valve plate assembly 2 stops rotating. In this way, the second plate body 202 faces the fluid side, that is, it bears the fluid pressure, avoiding the adverse effects of emergency closure of the valve in production. The control system alarms the staff through the alarm system, and the staff replaces the movable valve plate assembly 2 of the valve.

[0082] 3. Since the deformation position of the first plate body 8 can be located, the surface thickness of the first plate body 8 at the corresponding position can be increased during manufacturing, thereby increasing the service life of the valve while minimizing the weight and production cost of the valve.

[0083] In the first embodiment of the present scheme, the method for determining the sealing gasket detection data is to control the timer in the control system to operate for a period of one month. After the timing is over, the control system controls the electromagnet 115 to be energized, and the electromagnet 115 generates suction to the magnetic block 114. The movable rod 111 drives the extrusion sheet 112 to move outward, thereby squeezing the sealing gasket. After 2-5 seconds, the control system controls the electromagnet 115 to be de-energized, and the movable rod 111 moves inward under the rebound force of the sealing gasket, and the distance measuring component 113 detects the rebound distance of the movable rod 111. When the rebound distance of the movable rod 111 is less than the minimum value set by the early warning model, the control system controls the alarm to sound an alarm, which indicates that the sealing gasket has aged and needs to be replaced.

[0084] In the second embodiment of the present scheme, the method for determining the gasket detection data is to control the timer in the control system to operate for a period of one month. After the timing ends, the control system controls the boost pump 126 to pump gas into the transverse through hole 121. When the amount of air flowing in the flow meter 123 reaches the set value, the control system controls the boost pump 126 and the solenoid valve 127 to close. When the air pressure sensor 128 detects that the air pressure in the transverse through hole 121 is greater than the maximum value set by the early warning model, it means that the deformation of the gasket is poor (after the gasket is deformed, the air pressure in the transverse through hole 121 will decrease). The control system controls the alarm to sound an alarm, which means that the gasket has aged and needs to be replaced. It can be known that the air pressure in the transverse through hole 121 is proportional to the amount of air pumped in by the boost pump 126. Since in the present scheme, the thickness and material of the gasket are not limited, the specific amount of air pumped in by the boost pump 126 and the air pressure value in the transverse through hole 121 are not limited. Personnel in this technical field can determine them through a limited number of experiments.

[0085] In addition, the pressure is maintained for 60-300 seconds. During the pressure maintaining time, the air pressure sensor 128 performs real-time detection of the air pressure in the transverse through hole 121. When the pressure reduction rate reaches the maximum value set by the early warning model, the control system controls the alarm to sound an alarm, which indicates that the sealing gasket has a sealing problem and needs to be replaced.

[0086] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A groove valve with end face sealing, comprising a valve body (1), a driving member (3), a support rod (4), a valve stem (6) and a control system, characterized in that: The valve body (1) is provided with a valve plate assembly (2), which is driven by a driving member (3) to rotate the valve stem (6). When the valve stem (6) rotates, it drives the valve plate assembly (2) to rotate, thereby adjusting the opening and closing degree between the valve plate assembly (2) and the valve body (1), thereby adjusting the flow rate of the fluid flowing in the valve body (1); The valve plate assembly (2) comprises a valve seat (201) and a second plate body (202), the valve seat (201) being adapted to the valve stem (6), the second plate body (202) being located on a side of the liquid outlet of the valve body (1), a mounting groove (203) being provided on the side of the second plate body (202) facing the liquid inlet, a recess detection assembly (7) being fixed in the mounting groove (203), a first plate body (8) being fixed on an opposite side of the second plate body (202), and the recess detection assembly (7) being sealingly mounted between the first plate body (8) and the second plate body (202); The dent detection assembly (7) comprises a mounting plate (701) and a plurality of detection components, wherein the detection components are integrally mounted on the side of the mounting plate (701); Each detection component comprises a resistance wire (703), and the resistance value of the resistance wire (703) of each detection component is different; The depression amount and depression position of the first plate body (8) are detected by a depression detection component (7), and the depression detection component (7) is electrically connected to the control system; Each detection component can be positioned by a locator at a corresponding position, that is, the position of each detection component corresponds to the detection component one by one, and the positioning information is transmitted to the control system. The control system establishes a three-dimensional coordinate system proportional to the contour of the first plate (8) based on the position information, and intuitively displays the installation positions of all detection components; Sealing rubber rings (5) are provided on both inner walls of the valve body (1), and both sides of the sealing rubber ring (5) extend beyond the two end surfaces of the valve body (1) to form sealing gaskets; A rubber ring detection component is provided on the side of the valve body (1), and the sealing performance of the sealing gasket is detected by the rubber ring detection component; Each of the detection elements comprises two wires (709), a groove is provided on the side of the mounting plate (701), a fixing block (702) is fixed on the top of the groove, and a resistance wire (703) is movably arranged in the middle of the fixing block (702); A deformation component is provided on the side of the resistance wire (703), and after a depression appears on the surface of the first plate (8), the length of the resistance wire (703) is changed by the deformation component; The deformation component comprises a top conductive block (704) and a bottom conductive block (705) respectively fixed to two ends of the resistance wire (703), and two conductive wires (709) respectively fixed to the top conductive block (704) and the bottom conductive block (705); A fixing seat (706) is fixed on the top of the fixing block (702), and the fixing seat (706) is fixed to the top of the resistance wire (703); A plurality of pressure-bearing rods (708) are fixed to the top of the bottom conductive block (705); the pressure-bearing rods (708) are movably plugged into the fixed block (702); the top surface of the pressure-bearing rods (708) is higher than the top surface of the top conductive block (704); a pressure-bearing plate (707) is fixed to the top of the pressure-bearing rods (708); and the top surface of the pressure-bearing plate (707) is in contact with the back surface of the first plate body (8); A gap is formed between the bottom conductive block (705) and the bottom wall of the groove.

2. The groove valve with end face sealing according to claim 1, characterized in that: The spacing is 1-6 mm.

3. The groove valve with end face sealing according to claim 1, characterized in that: The rubber ring detection components are provided in a plurality of groups, and each group of rubber ring detection components is symmetrically arranged on both sides of the valve body (1); The rubber ring detection assembly comprises a detection groove formed on the valve body (1); a movable rod (111) is movably inserted on the outer side of the valve body (1) along the central axis direction of the valve body (1); an extrusion sheet (112) is provided between the sealing gasket and the end surface of the valve body (1); and the extrusion sheet (112) is fixed to one end of the movable rod (111); A magnetic block (114) is fixed on the rod body of the movable rod (111) extending into the detection slot, and an electromagnet (115) and a distance measuring member (113) are respectively fixed on both sides of the detection slot. When the electromagnet (115) is energized, it attracts the magnetic block (114) and drives the movable rod (111) to move toward the outside of the valve body (1); The distance between the end of the movable rod (111) extending into the detection slot and the distance measuring member (113) is detected by the distance measuring member (113), and the electromagnet (115) and the distance measuring member (113) are both electrically connected to the control system.

4. The groove valve with end face sealing according to claim 1, characterized in that: The rubber ring detection assembly comprises a transverse through hole (121) formed on the outside of the valve body (1), the transverse through hole (121) being arranged along the axial direction of the valve body (1), and the transverse through hole (121) passing through the valve body (1); The outside of the valve body (1) is connected to a flow meter (123) via a first connecting pipe, a pressure sensor (128) is connected to the pipe wall of the first connecting pipe, a pressure relief pipe (124) is fixedly connected to the pipe body of the first connecting pipe, and a pressure relief valve (125) is connected to the pipe body of the pressure relief pipe (124); The outside of the flow meter (123) is connected to a booster pump (126) via a second connecting pipe, and the body of the second connecting pipe is connected to an electromagnetic valve (127).

5. A valve self-test method, applied to the groove valve with end face seal according to any one of claims 1 to 4, comprising the following method: S1: establishing a corresponding objective function based on the elongation, resistance value and change resistance value of the resistance wire (703) in each dent detection component (7), and establishing a sealing gasket early warning model; S2: Acquire detection data, the detection data including sealing gasket detection data and resistance value data of the resistance wire (703) when the valve is closed; S3: Acquiring experimental data, the experimental data being the experimental rotational angular velocity of the valve plate assembly (2) when the first plate body (8) is at a minimum deformation under an experimental state when the valve is closed at different flow rates of the fluid; S4: inputting the acquired resistance value data of the resistance wire (703) into the corresponding target function to determine the deformation amount of the resistance wire (703), thereby determining the deformation amount and deformation position of the first plate body (8) in the working state outside the resistance wire (703), and transmitting the deformation amount and deformation position to the control system; The seal inspection data is also transmitted to the control system.

6. A valve self-checking method according to claim 5, characterized in that: The control system compares the deformation of the first plate body (8) under the working state obtained in S4 with the maximum deformation of the first plate body (8) under the working state. When the deformation of the first plate body (8) under the working state reaches the maximum deformation of the first plate body (8) under the working state set by the system, when the valve is closed again, the control system controls the drive member (3) to adjust the valve plate assembly (2) to rotate at the current flow rate according to the experimental rotational angular velocity of the valve plate assembly (2) when the first plate body (8) is at the minimum deformation under the experimental state.

7. A valve self-checking method according to claim 5, characterized in that: The method for determining the sealing gasket detection data is as follows: the control system controls the electromagnet (115) to be energized regularly, the electromagnet (115) generates suction force on the magnetic conductive block (114), and the movable rod (111) drives the extrusion sheet (112) to move outward, thereby extruding the sealing gasket; After 2-5 seconds, the control system controls the electromagnet (115) to be powered off, and the movable rod (111) moves inward under the rebound force of the sealing gasket, and the distance measuring member (113) detects the rebound distance of the movable rod (111); When the rebound distance of the movable rod (111) is less than the minimum value set by the early warning model, the control system controls the alarm to sound an alarm.

8. A valve self-checking method according to claim 5, characterized in that: The method for determining the sealing gasket detection data is as follows: the control system controls the booster pump (126) to regularly pump gas into the transverse through hole (121); when the amount of air flowing through the flow meter (123) reaches a set value, the control system controls the booster pump (126) and the solenoid valve (127) to close; When the air pressure sensor (128) detects that the air pressure in the transverse through hole (121) is greater than the maximum value set by the early warning model, the control system controls the alarm to sound an alarm; The pressure is maintained for 60-300 seconds. During the pressure maintenance time, the air pressure sensor (128) detects the air pressure in the transverse through hole (121) in real time. When the pressure reduction rate reaches the maximum value set by the early warning model, the control system controls the alarm to sound an alarm.

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