A method for testing valve pressure resistance

Abstract

A valve pressure resistance detection method, characterized in that it includes the following steps: first, the valve is installed on a detection device composed of a left clamp, a right clamp, a left detection component, a right detection component, an upper semicircle detection component, and a lower semicircle detection component; second, the data monitored in real time by the pressure sensors installed on the left detection part, the right detection component, the upper semicircle detection component, and the lower semicircle detection component are collected through an online monitoring data acquisition card and compared with the relevant model simulation data in the computer. If the collected data is basically consistent with the simulation data, data processing is performed. If the real-time collected data result is greatly different from the simulation result and is not close, the computer is required to modify the model for re-simulation until the simulation result is basically consistent with the real-time collection result before subsequent processing. The method of the present invention is simple, easy to operate, and can achieve one-button operation.

Description

Technical Field

[0001] The present invention relates to a valve pressure resistance detection technology, in particular to a detection technology for valves with complex structures and many difficult-to-measure points, specifically to a valve pressure resistance detection method, which facilitates customers to learn about the relevant conditions of the valve after timely detection through the accompanying detection software. Background Art

[0002] Valves are used in many industries, and their structures are relatively complex, especially the internal structures are special and complex. The traditional method of detecting the pressure of valves is mainly to monitor the pressure of the gas entering the valve, but there is often a large deviation between the measured pressure and the actual pressure value, and the service life of the valve body is insufficiently expected, causing many dangerous factors for customers during use, and even affecting the benefits of valve manufacturing companies. Based on the uniqueness of the valve, the present invention designs a detection method based on a valve pressure detection device that can detect multiple points. At the same time, the real-time results of the valve detection are compared with the simulation results. Through the combination of experiments and simulations, the service life (or use time) of the valve under certain working conditions is known, which is convenient for customers to grasp the use time of the valve earlier and avoid some unnecessary safety accidents. The device of the present invention has a simple structure, is easy to operate, and is easy to promote. Summary of the invention

[0003] The purpose of the present invention is to address the problem of low accuracy in detecting the complexity of valve structures, and to invent a valve pressure resistance detection method based on a special valve pressure detection device. The method mainly arranges multiple pressure sensors on the surface of the valve, obtains the pressure changes of the sensors in each part in real time, and compares them with the simulation results in real time, continuously improves the simulation model, and simulates the service life of the valve through the improved simulation model, so that customers can grasp the service life (or usage time) of the valve more directly and intuitively.

[0004] The technical solution of the present invention is:

[0005] A valve pressure resistance detection method is characterized by comprising the following steps:

[0006] First, the valve 9 is installed on the detection device composed of the left clamp 1, the right clamp 2, the left detection component 3, the right detection component 4, the upper semicircular detection component 5, and the lower semicircular detection component 6; the valve 9 is clamped by the left clamp 1 and the right clamp 2 respectively, and the pressurized air is introduced into the valve 9 through the left vent 7 opened on the left clamp 1 and the right vent 8 opened on the right clamp 2. When the pressurized air is introduced into the interior of the valve 9, the left detection component 3, the right detection component 4, the upper semicircular detection component 5, and the lower semicircular detection component 6 simultaneously hold the outer surface of the valve 9, and the left detection component 3, the right detection component 4, the upper semicircular detection component 5, and the lower semicircular detection component 6 are respectively equipped with pressure sensors for detecting the pressure conditions of various parts of the valve 9;

[0007] Secondly, the data monitored in real time by the pressure sensors installed on the left detection component 3, the right detection component 4, the upper semicircle detection component 5 and the lower semicircle detection component 6 are collected through the online monitoring data acquisition card and compared with the relevant model simulation data in the computer. If the collected data is basically consistent with the simulation data, data processing is performed to obtain a pressure curve diagram comparing the experimental value and the simulation value. At the same time, cloud mapping is implemented according to the distribution degree of the collected data to obtain a stress distribution cloud diagram. The weakest position of the valve 9 under pressure is found out according to the comparison of the cloud diagram and the curve diagram, and then the weak position is fed back to the computer for life simulation to obtain the service life or use time of the valve 9 under working conditions; if the real-time collected data results are greatly different from the simulation results and are not close, the computer is required to modify the model for re-simulation until the simulation results are basically consistent with the real-time collection results before subsequent processing is performed. After all experiments are completed, the computer will print out the final service life or use time of the valve 9, the experimental and simulated pressure curve diagrams and the pressure cloud diagram for user call and reference.

[0008] The left clamp 1 and the right clamp 2 are hydraulic cylinders.

[0009] The left detection component 3, the right detection component 4, the upper semicircle detection component 5 and the lower semicircle detection component 6 are pressure sensors.

[0010] The left vent hole 7 and the right vent hole 8 are supplied with air by a compressor or an air pump, and the air pressure and flow rate are adjustable.

[0011] Beneficial effects of the present invention:

[0012] The present invention can detect the pressure distribution inside the valve with complex structure, and can obtain the pressure distribution diagram of different distribution structures such as linear or cloud diagram, so that customers can understand the weak position of valve pressure and the service life or use time of the valve, effectively avoid the occurrence of unsafe factors, and ensure the safe use of the valve within the service life. At the same time, the method of the present invention is simple, easy to operate, and can realize one-button operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of valve pressure detection.

[0014] Figure 2 It is a software flow chart for valve pressure detection and life prediction.

[0015] Figure 3 It is a schematic diagram of the structure of the hydraulic cylinder used for detection of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1-3 shown.

[0018] A valve pressure resistance detection method comprises the following steps:

[0019] First, install the valve 9 on the detection device consisting of the left clamp 1, the right clamp 2, the left detection component 3, the right detection component 4, the upper semicircular detection component 5, and the lower semicircular detection component 6, as shown in FIG. Figure 1 As shown; valve 9 is respectively clamped by the left (preferably using Figure 3 The dedicated hydraulic cylinder) 1 and the right clamp 2 (preferably Figure 3 The left and right vent holes 7 and 8 can be supplied with air by a compressor or an air pump, and the air supply pressure is adjustable. When the pressurized air is introduced into the interior of the valve 9, the left detection component 3, the right detection component 4, the upper semicircular detection component 5 and the lower semicircular detection component 6 (pressure sensors can be used through corresponding conventional installation structures) simultaneously hold the outer surface of the valve 9. Pressure sensors are respectively installed on the left detection component 3, the right detection component 4, the upper semicircular detection component 5 and the lower semicircular detection component 6 to detect the pressure conditions of various parts of the valve 9.

[0020] Secondly, the data monitored in real time by the pressure sensors installed on the left detection component 3, the right detection component 4, the upper semicircle detection component 5 and the lower semicircle detection component 6 are collected through the online monitoring data acquisition card and compared with the relevant model simulation data in the computer. The software can be used for automatic comparison, and the software can be compiled by itself or outsourced. If the collected data is basically consistent with the simulation data, data processing is performed to obtain a pressure curve diagram comparing the experimental value and the simulation value. At the same time, cloud mapping is implemented according to the distribution degree of the collected data to obtain a stress distribution cloud diagram. The weakest position of the valve 9 under pressure is found out by comparing the cloud diagram and the curve diagram, and then the weak position is fed back to the computer for life simulation to obtain the service life or use time of the valve 9 under working conditions; if the real-time collected data results are significantly different from the simulation results and are not close, the computer is required to modify the model for re-simulation until the simulation results are basically consistent with the real-time collection results, and then subsequent processing is performed. After all experiments are completed, the computer will print out the final service life or use time of the valve 9, the experimental and simulated pressure curves and the pressure cloud diagram for user reference. Figure 2 shown.

[0021] The clamping hydraulic cylinders preferred for left clamp 1 and right clamp 2 are as follows: Figure 3As shown, it includes a cylinder body 101, a push rod 102, and a piston 103. The piston 103 is installed in the cylinder body 101 and connected to the push rod 102. A partition layer 105 is provided in the rod cavity of the cylinder body 101. The center of the partition layer 105 is provided with a through hole for the push rod 102 to pass through. A conical ring surface 107 (with a cone angle of 1 to 5°) is provided in the cylinder body 101 outside the partition layer 105. An elastic interlayer 108 is sleeved on the conical ring surface 107. When the elastic interlayer 108 is squeezed, a conical through hole is formed. A sealing ring 106 is installed in the through hole to ensure the centering and smooth entry and exit of the push rod 102; the outer ring of the piston 103 is provided with a hard plastic layer 104 that can increase the sealing performance, and the surface of the hard plastic layer 104 that contacts the inner surface of the cylinder body 101 is engraved with a pattern, the protruding end of the push rod 102 is a frustum structure; the rodless cavity of the cylinder body 101 is connected with the large cylinder oil inlet 109 and the large cylinder oil outlet 110, the large cylinder oil inlet 109 is installed with a large cylinder oil inlet control valve 113, and the large cylinder oil outlet 110 is installed with a large cylinder oil outlet control valve 114; the rod cavity of the cylinder body 101 is connected with the small cylinder oil inlet 111 and the small cylinder oil outlet 112, the small cylinder oil inlet control valve 115 is installed on the small cylinder oil inlet 111, and the small cylinder oil outlet control valve 116 is installed on the small cylinder oil outlet 112; controlling the opening degree of the large cylinder oil inlet control valve 113, the large cylinder oil outlet control valve 114, the small cylinder oil inlet control valve 115 and the small cylinder oil outlet control valve 116 and working can realize the control of the oil inlet and oil outlet pressures, thereby controlling the working state of the push rod. The large cylinder oil outlet 110 is on the side of the large cylinder oil inlet 109, and the small cylinder oil outlet 112 is on the side of the small cylinder oil inlet 111. When the large cylinder oil inlet 109 is filled with oil, the large cylinder oil outlet 110 is closed, the small cylinder oil outlet 116 is opened, and the small cylinder oil inlet 111 is closed, the push rod 102 extends outward to clamp the valve; when the large cylinder oil inlet 109 is closed, the large cylinder oil outlet 110 is opened, the small cylinder oil outlet 116 is closed, and the small cylinder oil inlet is filled with oil, the push rod 102 shrinks inward to release the clamped valve. The front end of the push rod 102 is made into a conical surface for easy extension and retraction. At the same time, there is a taper of 1~5° on the conical annular surface 107. The purpose is to avoid the push rod 2 from having a low concentricity in the circular hole surrounded by the elastic interlayer 8 due to the deflection of the push rod 102, resulting in jamming. When the push rod 102 is deflected in the circular hole surrounded by the elastic interlayer 108, the push rod 102 presses the circular hole of the elastic interlayer 108, and the circular hole of the elastic interlayer 108 compresses the spring inward and deflects 1~5°, ensuring that the push rod 102 is not stuck.The large cylinder oil inlet control valve 113 and the small cylinder oil outlet control valve 116, and the large cylinder oil outlet control valve 114 and the small cylinder oil inlet control valve 115 are monitored online by sensors; in order to ensure the stable operation of the hydraulic cylinder during clamping and loosening, when the hydraulic cylinder is extended to clamp, the large cylinder oil inlet 109 is opened, and the small cylinder oil outlet 116 is opened at the same time, and the flow rate of the oil in each oil port is adjusted by the sensor. If the large cylinder oil inlet 109 takes in oil too fast, it is necessary to monitor and feedback to the large cylinder oil outlet 110 through the sensor and open it to drain oil at a certain flow rate to ensure the stable advancement of the push rod 102. Similarly, when the hydraulic cylinder is loosened, it is necessary to open the small cylinder oil inlet control valve 15, and the large cylinder oil outlet 110 is opened at the same time, and the flow rate of the oil in each oil port is adjusted by the sensor. If the small cylinder oil inlet 15 takes in oil too fast, it is necessary to monitor and feedback to the small cylinder oil outlet 116 through the sensor and open it to drain oil at a certain flow rate.

[0022] Details are as follows:

[0023] The valve pressure detection device of the present invention mainly comprises a left clamp 1, a right clamp 2, a left detection component 3, a right detection component 4, an upper semicircular detection component 5, a lower semicircular detection component 6, a left vent 7 and a right vent 8. Figure 1 As shown, the valve 9 of the present invention is clamped by the left clamp 1 and the right clamp 2 respectively, and pressurized air is introduced into the valve 9 through the left vent hole 7 opened on the left clamp 1 and the right vent hole 8 opened on the right clamp 2. When the pressurized air enters the interior of the valve 9, the left detection component 3, the right detection component 4, the upper semicircular detection component 5 and the lower semicircular detection component 6 simultaneously hold the outer surface of the valve 9, and the left detection component 3, the right detection component 4, the upper semicircular detection component 5 and the lower semicircular detection component 6 are respectively equipped with rows of pressure sensors for detecting the pressure conditions of various parts of the valve 9.

[0024] like Figure 1 , 2As shown, the device of the present invention is equipped with detection and analysis software (which can be compiled by itself), and its working process is: first, the data monitored in real time by the pressure sensors installed on the left detection component 3, the right detection component 4, the upper semicircle detection component 5 and the lower semicircle detection component 6 are collected through the online monitoring data acquisition card and compared with the relevant model simulation data in the computer equipped with the device. If the collected data is basically consistent with the simulation data, data processing is performed, and a pressure curve diagram comparing the experimental value and the simulation value appears. At the same time, cloud map drawing is realized according to the distribution degree of the collected data to obtain a stress distribution cloud map, and the weakest position of the valve 9 under pressure is found according to the comparison of the cloud map and the curve map, and then the weak position is fed back to the computer for life simulation, and the service life (or use time, etc.) of the valve 9 under the working condition is known; if the real-time collected data result is greatly different from the simulation result, and is not close, the computer is required to modify the model for re-simulation until the simulation result is basically consistent with the real-time collection result before the subsequent steps are performed. After all experiments are completed, the computer prints out the final service life (or use time, etc.) of the valve 9, the experimental and simulated pressure curve diagrams and the pressure cloud diagram for users to call and refer to.

[0025] The present invention does not involve parts that are the same as the prior art or can be implemented by using the prior art.

Claims

1. A valve pressure resistance detection method, characterized by: The following steps are involved: First, the valve (9) is mounted on a detection device consisting of a left clamp (1), a right clamp (2), a left detection component (3), a right detection component (4), an upper semicircular detection component (5), and a lower semicircular detection component (6); the valve (9) is clamped by the left clamp (1) and the right clamp (2), respectively, and pressurized air is introduced into the valve (9) through a left vent hole (7) opened on the left clamp (1) and a right vent hole (8) opened on the right clamp (2); while the pressurized air is introduced into the interior of the valve (9), the left detection component (3), the right detection component (4), the upper semicircular detection component (5), and the lower semicircular detection component (6) simultaneously hold the outer surface of the valve (9); and pressure sensors are respectively installed on the left detection component (3), the right detection component (4), the upper semicircular detection component (5), and the lower semicircular detection component (6) for detecting the pressure conditions of various parts of the valve (9); Secondly, the data monitored in real time by the pressure sensors installed on the left detection component (3), the right detection component (4), the upper semicircle detection component (5) and the lower semicircle detection component (6) are collected through the online monitoring data collection card and compared with the relevant model simulation data in the computer. If the collected data is basically consistent with the simulation data, data processing is performed to obtain a pressure curve diagram comparing the experimental value and the simulation value. At the same time, cloud mapping is performed according to the distribution degree of the collected data to obtain a stress distribution cloud diagram. The weakest position of the valve (9) under pressure is found out according to the comparison between the cloud diagram and the curve diagram, and then the weak position is fed back to the computer for life simulation to obtain the service life or use time of the valve (9) under the working condition. If the real-time collected data result is significantly different from the simulation result and is not close, the computer is required to modify the model and simulate again until the simulation result is basically consistent with the real-time collected result, and then subsequent processing is performed. After all experiments are completed, the computer prints out the final service life or use time of the valve (9), the experimental and simulated pressure curve diagrams and the pressure cloud diagram for the user to call and refer to.

2. The valve pressure resistance detection method according to claim 1 is characterized in that: The left clamp (1) and the right clamp (2) are hydraulic cylinders.

3. The valve pressure resistance detection method according to claim 1 is characterized in that: The left detection component (3), the right detection component (4), the upper semicircle detection component (5) and the lower semicircle detection component (6) are pressure sensors.

4. The valve pressure resistance detection method according to claim 1 is characterized in that: The left vent hole (7) and the right vent hole (8) are supplied with air by a compressor or an air pump, and the air pressure and flow rate are adjustable.

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