A valve internal pressure deformation detection system

Abstract

The present invention relates to the field of valve detection technology, and specifically discloses a valve internal pressure deformation detection system, comprising: a balance test unit obtains pressure values ​​at both ends of a valve assembly through a first pressure sensor and a second pressure sensor respectively, and performs a balance test according to the pressure values ​​at both ends; a deformation detection unit obtains a preset strain gauge resistance change value and a displacement change value of a displacement sensor on the surface of a valve sealing material to perform valve pressure deformation detection; a data analysis unit determines the balance of the valve assembly according to the balance test analysis, and performs deformation detection analysis; and determines whether the deformation coefficient at a preset position of the valve meets the requirements according to the deformation detection analysis: if not, it is determined that the valve generates pressure deformation, performs pressure relief processing and enters a control and adjustment unit; the control and adjustment unit adjusts the horizontal test position of the valve assembly through a driver and receives a control signal to move the valve shaft to adjust the valve opening inside the valve assembly.

Description

Technical Field

[0001] The invention relates to the technical field of valve detection, and in particular to a valve internal pressure deformation detection system. Background Art

[0002] As a key control component in the fluid delivery system, the performance of the valve directly affects the safety and stable operation of the entire system. During long-term use, the valve may be deformed due to the pressure of the internal medium. If this deformation is not discovered and handled in time, it may cause the valve to close loosely, leak or even fail, which may cause a safety accident in serious cases.

[0003] Traditional valve inspection methods usually rely on manual balance testing and valve tightness inspection, which is inefficient and difficult to ensure the accuracy and consistency of inspection. With the improvement of industrial automation and intelligence, the requirements for valve inspection technology are also getting higher and higher, and it is necessary to develop a system that can achieve automated, efficient and high-precision inspection.

[0004] In recent years, with the development of sensor technology, data processing technology and mechanical design technology, a variety of valve performance testing equipment and systems have been developed. For the detection of the valve opening end, the internal condition of the valve is tested and detected by setting a control valve and various sensors for real-time data analysis. However, due to the inconsistent detection standards for valves of different models, directly performing a balance test based on the existing test data cannot effectively judge the overall condition of the valve interior, and it is difficult to effectively predict the airtight balance and safety of the valve by only performing a pressure test. Summary of the invention

[0005] The purpose of the present invention is to provide a valve internal pressure deformation detection system to solve the following technical problems:

[0006] How to improve the stability and pressure resistance of valve components, ensure early prediction of deformation problems at valve interfaces, and ensure safety and sealing under high pressure conditions.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A valve internal pressure deformation detection system, comprising:

[0009] It comprises a horizontally arranged valve assembly, wherein a first sealing device and a second sealing device are matched and fixed at the openings at the front and rear ends of the valve assembly, respectively, and a first pressure sensor and a second pressure sensor are respectively arranged near the valve assembly through the inside of the first sealing device and the second sealing device; the first sealing device and the second sealing device also include valve sealing materials; the valve sealing materials are arranged at the connection between the first sealing device and the second sealing device and the valve assembly respectively;

[0010] A balance test unit, used to obtain pressure values ​​at both ends of the valve assembly through a first pressure sensor and a second pressure sensor, and perform a balance test according to the pressure values ​​at both ends;

[0011] A deformation detection unit, used to obtain a preset strain gauge resistance change value and a displacement change value of a displacement sensor on the surface of a valve sealing material to perform deformation detection of valve pressure;

[0012] A data acquisition unit, used to acquire data information received by the first pressure sensor, the second pressure sensor, the strain gauge, and the position sensor;

[0013] The data analysis unit is used to determine whether the balance of the valve assembly meets the requirements based on the balance test analysis:

[0014] If yes, deformation detection analysis is performed;

[0015] If not, suspend the balance test and enter the control and adjustment unit;

[0016] And used to determine whether the deformation coefficient at the preset position of the valve meets the requirements based on deformation detection analysis:

[0017] If not, it is determined that the valve has pressure deformation, and pressure relief is performed and the control and adjustment unit is entered;

[0018] The control and adjustment unit is used to adjust the horizontal test position of the valve assembly through a driver and receive a control signal to move the valve shaft to adjust the valve opening inside the valve assembly.

[0019] Preferably, the method of balancing test comprises:

[0020] Collect the pressure values ​​at both ends of the valve assembly that is continuously filled with gas within a preset test time period, and calculate the difference D0 between the pressure values ​​at both ends;

[0021] Collect the pressure values ​​at both ends of the valve assembly that is continuously filled with fluid during the preset test period, and calculate the difference D between the pressure values ​​at both ends i ;

[0022] Obtain a curve E0 showing the difference D0 changing with time within a preset time period;

[0023] Get the difference D within the preset time period i The curve E changes with time i ;

[0024] The curve E0 and the curve E i Constructed in the same coordinate system, compare curve E0 and curve E i The size of the overlap area value ΔS:

[0025] If ΔS is greater than the preset threshold, it is judged that the balance inside the current valve is good;

[0026] Otherwise, it is judged that the balance inside the current valve is poor.

[0027] Preferably, the balance test is implemented by providing an operation interface to the user for testing through the control instructions of the control program, and the control flow of the control instructions is:

[0028] S1, perform control program initialization processing;

[0029] S2. Start the test, pressurize the inside of the single-side sealing device through an external pressure source, simulate the pressure state of the valve component in actual gas operation, and determine whether an abnormality occurs. If so, complete the alarm processing, otherwise proceed to the next step;

[0030] S3, based on step S2, the external fluid is passed through the single-side sealing device to pressurize the inside of the valve assembly, simulating the pressure state of the valve assembly in actual liquid work, and judging whether an abnormality occurs. If so, the alarm processing is completed, otherwise, the next step is entered;

[0031] S4, based on step S3, enter the balance test, determine whether to start the automatic test state, if so, continue to run, otherwise stop the test and return to step S1.

[0032] Preferably, the deformation detection analysis method is:

[0033] By formula Calculate the deformation coefficient Def at the valve position point k k ; Wherein, μ1 is the first preset weight coefficient, μ2 is the second preset weight coefficient, and both μ1 and μ2 are greater than 0; Q ρ is the elastic modulus of the sealing material; ΔR is the resistance change value of the strain gauge; R0 is the standard resistance change value of the strain gauge; s is the sensitivity coefficient of the strain gauge; ΔL is the displacement change value; L0 is the standard displacement change value; τ k is the preset position coefficient at position point k.

[0034] Preferably, the deformation coefficient Def k Compare with the preset deformation coefficient threshold interval [Def1, Def2]:

[0035] If Def k ≤Def1, it is judged that the deformation range of the valve at the current position is small;

[0036] If Def1<Def k ≤Def2, it is judged that the deformation range of the valve at the current position is normal;

[0037] If Defk >Def2, it is judged that the deformation range at the current position of the valve is large and pressure deformation occurs.

[0038] Preferably, the control and adjustment unit comprises:

[0039] The adjustment calculation formula for the valve component detection position is:

[0040] Calculate the moving distance ΔP; where n is the total number of balance test points, j∈[1,n]; m ij is the fluid flow rate at the jth position; D ij is the difference between the pressure values ​​at both ends of the valve assembly at the jth position when the fluid is continuously filled;

[0041] K is the judgment function, judging when When; then L=A;

[0042] otherwise,

[0043] Q th is the allowable threshold; A is the fixed adjustment value.

[0044] Preferably, the calculation formula for adjusting the valve opening is:

[0045] Opening adjustment ratio r formula:

[0046]

[0047] Valve opening x formula:

[0048] x=r(x max -x min )+x min ;

[0049] Among them, m max is the flow rate corresponding to the maximum opening; m min is the flow rate corresponding to the minimum opening; x max is the maximum opening value; x min is the minimum opening value.

[0050] Preferably, the system further comprises:

[0051] The result evaluation unit is used to input the historical deformation detection analysis results into the evaluation model to output the evaluation results, and judge the stability and pressure resistance performance of the valve component according to the evaluation results.

[0052] Beneficial effects of the present invention:

[0053] (1) The present invention sets a balance test unit to obtain the pressure values ​​at the front and rear ends of the valve assembly through the first pressure sensor and the second pressure sensor, and performs a balance test according to the pressure values ​​at the two ends; based on the balance test results, the stability of the valve assembly when subjected to the internal and external pressure difference is evaluated to ensure that it can maintain good sealing and structural integrity under specified working conditions; and based on the valve use range of the valve assembly with different pressure distribution characteristics for the filled medium, the dual-medium test method is combined with the different physical properties of gas and fluid to more comprehensively test the balance characteristics of the valve assembly.

[0054] (2) The present invention detects the deformation of the valve pressure by setting a deformation detection unit to obtain the preset strain gauge resistance change value and displacement change value of the displacement sensor on the surface of the valve sealing material; and uses the strain gauge to monitor the resistance change value and the displacement sensor to detect the displacement change to evaluate the deformation of the valve under pressure.

[0055] (3) Setting up a data acquisition unit, a data analysis unit, and a control and adjustment unit to realize the process of data acquisition, analysis, and adjustment and control based on the analysis results of the valve balance test and deformation test, and to improve the intelligent detection, precise adjustment, and safety prediction process of the valve.

[0056] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0058] Figure 1 This is a module diagram of a valve internal pressure deformation detection system of the present invention;

[0059] Figure 2 This is a structural diagram of a valve internal pressure deformation detection system of the present invention;

[0060] Figure 3 Schematic diagram of the control flow steps of the control instructions of the present invention. DETAILED DESCRIPTION

[0061] 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.

[0062] See also Figure 1-2 As shown, the present invention is a pressure deformation detection system in a valve, comprising: a hardware device having a horizontally arranged valve assembly, through which the pressure direction in the control pipeline and the flow direction of the detection gas and liquid are selected and controlled by the horizontal arrangement of the valve assembly; and a first sealing device and a second sealing device are respectively matched and fixed at the front and rear openings of the valve assembly, and are respectively installed at the front and rear openings of the valve assembly according to the installation positions of the first sealing device and the second sealing device, so as to ensure the sealing between the valve and the pipeline.

[0063] A first pressure sensor and a second pressure sensor are respectively arranged inside the first sealing device and the second sealing device near the valve assembly, so that the pressure conditions at both ends of the valve assembly can be monitored in real time according to the first pressure sensor and the second pressure sensor, and pressure change data can be provided to evaluate the sealing performance and pressure change of the valve; and the first sealing device and the second sealing device also include valve sealing materials; by arranging the valve sealing materials at the connection between the first sealing device and the second sealing device and the valve assembly, the sealing effect can be enhanced to prevent fluid leakage.

[0064] The software system includes:

[0065] A balance test unit, used to obtain pressure values ​​at both ends of the valve assembly through a first pressure sensor and a second pressure sensor, and perform a balance test according to the pressure values ​​at both ends;

[0066] The deformation detection unit is used to obtain the preset strain gauge resistance change value and displacement change value of the displacement sensor on the surface of the valve sealing material to perform deformation detection of the valve pressure; the strain gauge is used to monitor the resistance change value and the displacement sensor is used to detect the displacement change to evaluate the deformation of the valve under pressure.

[0067] A data acquisition unit, used to acquire data information received by the first pressure sensor, the second pressure sensor, the strain gauge, and the position sensor;

[0068] The data analysis unit is used to determine whether the balance of the valve assembly meets the requirements based on the balance test analysis:

[0069] If yes, deformation detection analysis is performed;

[0070] If not, suspend the balance test and enter the control and adjustment unit;

[0071] And used to determine whether the deformation coefficient at the preset position of the valve meets the requirements based on deformation detection analysis:

[0072] If not, it is determined that the valve has pressure deformation, and pressure relief is performed and the control and adjustment unit is entered;

[0073] The control and adjustment unit is used to adjust the horizontal test position of the valve assembly through a driver and receive a control signal to move the valve shaft to adjust the valve opening inside the valve assembly.

[0074] In the above technical solution, the system structure in this embodiment includes five units: a balance test unit, a deformation detection unit, a data acquisition unit, a data analysis unit, and a control and adjustment unit to realize the safe operation and performance monitoring process of the valve assembly under the test high pressure.

[0075] Specifically, first, a balance test unit is provided to obtain pressure values ​​at both ends of the valve assembly through a first pressure sensor and a second pressure sensor, respectively, and a balance test is performed according to the pressure values ​​at both ends.

[0076] Furthermore, as an embodiment of the present invention, a method for implementing a balance test of a balance test unit includes:

[0077] Collect the pressure values ​​at both ends of the valve assembly that is continuously filled with gas within a preset test time period, and calculate the difference D0 between the pressure values ​​at both ends;

[0078] Collect the pressure values ​​at both ends of the valve assembly that is continuously filled with fluid during the preset test period, and calculate the difference D between the pressure values ​​at both ends i ;

[0079] Obtain a curve E0 showing the difference D0 changing with time within a preset time period;

[0080] Get the difference D within the preset time period i The curve E changes with time i ;

[0081] The curve E0 and the curve E i Constructed in the same coordinate system, compare curve E0 and curve E i The size of the overlap area value ΔS:

[0082] If ΔS is greater than the preset threshold, it is judged that the balance inside the current valve is good;

[0083] Otherwise, it is judged that the balance inside the current valve is poor.

[0084] In the above technical solution, the present embodiment uses a balance test to evaluate the stability of the valve assembly when subjected to internal and external pressure differences, ensuring that it can maintain good sealing and structural integrity under specified working conditions. Based on the use range of valves with different pressure distribution characteristics for the filled medium, the dual-medium test method is combined with the different physical properties of gas and fluid to more comprehensively test the balance characteristics of the valve assembly.

[0085] The specific test process is as follows: first, the pressure values ​​at both ends of the valve assembly with continuous gas filling are obtained, and the difference D0 between the pressure values ​​at both ends is calculated; since the gas medium is mainly considered in the valve's airtightness when filling the valve, the pressure difference at both ends of the valve assembly is not large due to the uniform distribution characteristics of the gas under normal equilibrium, so this embodiment uses the pressure data obtained by the filling of the gas as the standard reference value. Then, the pressure values ​​at both ends of the valve assembly with continuous fluid filling within the preset test time period are collected, and the difference D0 between the pressure values ​​at both ends is calculated. i ; Since the fluid medium is affected by gravity during the filling process, once the valve assembly is not balanced enough, the pressure difference at both ends of the valve interface will change significantly, affecting the results of the entire balance test.

[0086] Next, obtain the curve E0 of the difference value D0 changing with time within the preset time period, and obtain the difference value D i The curve E changes with time i ; Connect curve E0 and curve E i Constructed in the same coordinate system, compare curve E0 and curve E i The size of the overlap area value ΔS can intuitively reflect the current balance processing status inside the valve component through curve comparison analysis. Specifically, the two curves obtained from the gas test and the fluid test are placed in the same coordinate system for visual superposition, and the degree of fit between the two curves is observed. By comparing the size of the area covered by the two curves (overlap area), the balance of the valve component is quantified. If ΔS is greater than the preset threshold, it is judged that the balance inside the current valve is good; otherwise, it is judged that the balance inside the current valve is poor.

[0087] See also Figure 3 As shown, as an implementation of the present invention, the balance test is implemented by providing an operation interface to the user for testing through the control instructions of the control program, and the control flow of the control instructions is:

[0088] S1, perform control program initialization processing;

[0089] S2. Start the test, pressurize the inside of the single-side sealing device through an external pressure source, simulate the pressure state of the valve component in actual gas operation, and determine whether an abnormality occurs. If so, complete the alarm processing, otherwise proceed to the next step;

[0090] S3, based on step S2, the external fluid is passed through the single-side sealing device to pressurize the inside of the valve assembly, simulating the pressure state of the valve assembly in actual liquid work, and judging whether an abnormality occurs. If so, the alarm processing is completed, otherwise, the next step is entered;

[0091] S4, based on step S3, enter the balance test, determine whether to start the automatic test state, if so, continue to run, otherwise stop the test and return to step S1.

[0092] In the above technical scheme, this embodiment uses a balance test to ensure that the valve assembly can work normally under different working conditions, and detects its performance by simulating the pressure state of the valve under gas and liquid media. Specifically, first, the control program is initialized to provide an environment for test preparation and ensure that all system components are in an operational state. Initialization includes system hardware inspection (such as pressure sensors, actuators, etc.), software environment configuration, safety mechanism setting, and data recording preparation. Then, the test is started to ensure the pressure response of the valve assembly under the gas working state. Specifically, the pressure is applied to the inside of the single-side sealing device through an external pressure source to simulate the pressure state of the valve assembly in actual gas work, and it is determined whether an abnormality occurs. If so, the alarm processing is completed, otherwise it proceeds to the next step; the valve assembly is pressurized through an external pressure source to simulate the actual gas working environment. Monitor the pressure changes and component reactions to determine whether there is a leak or abnormality; if an abnormality is detected (such as leakage, deformation, etc.), the alarm mechanism is immediately activated, the test is stopped, and the fault information is recorded.

[0093] Next, based on the previous step, the performance of the valve assembly under liquid medium is further tested by flushing and pressurizing the inside of the valve assembly through a single-sided sealing device with external fluid. Use external fluid to flush and pressurize the inside of the valve assembly through a single-sided sealing device to simulate the working state of the liquid; similar to step S2, it is used to monitor abnormalities and respond in time. Finally, comprehensively evaluate the performance of the valve assembly under different working conditions to determine whether to enter the automatic test cycle. By entering the balance test based on step S3, it is determined whether to start the automatic test state and whether it is necessary to continue multiple rounds of testing to ensure the reliability and consistency of the data; if so, continue to run, otherwise stop the test and return to step S1 to make balance adjustments, and continue to prepare for the next round of testing to ensure that a sufficient amount of test sample information is obtained.

[0094] As an implementation mode of the present invention, the deformation detection and analysis method is:

[0095] By formula Calculate the deformation coefficient Def at the valve position point k k ; Wherein, μ1 is the first preset weight coefficient, μ2 is the second preset weight coefficient, and μ1 and μ2 are both greater than 0; Oρ is the elastic modulus of the sealing material; ΔR is the resistance change value of the strain gauge; R0 is the standard resistance change value of the strain gauge; s is the sensitivity coefficient of the strain gauge; ΔL is the displacement change value; L0 is the standard displacement change value; τ k is the preset position coefficient at position point k.

[0096] In the above technical solution, the method of deformation detection in this embodiment is specifically to calculate the deformation coefficient through a formula, and judge the deformation range of the current position of the valve according to the size of the deformation coefficient; generally, a certain degree of deformation at the working valve interface is acceptable, and if it exceeds this range, it is judged that there is a risk of internal deformation of the valve. Based on this, this embodiment judges the risk of valve deformation by obtaining deformation-related data and the change of its placement position. Specifically, the calculation formula Calculate the deformation coefficient Def at the valve position point k k , obtain the resistance change value of the strain gauge and the change of the displacement change value collected by the displacement sensor, and according to the deformation of the set position, combined with the material condition of the sealing material, that is, the elastic modulus Q of the sealing material ρ , determine the deformation coefficient of different points in the valve, and realize the accurate testing process of predicting the deformation inside the valve, especially the internal deformation of the pipe mouth.

[0097] Among them, it should be noted that the first preset weight coefficient μ1, the second preset weight coefficient μ2, R0, and L0 are all obtained by simulation based on historical data, which will not be described in detail here; and the first preset weight coefficient μ1 is obtained by qualitative simulation analysis based on the resistance condition of the strain gauge and the influence of the material selection of the sealing material measured on the deformation coefficient, and the second preset weight coefficient μ2 is obtained by mathematical simulation and quantitative calculation based on the influence of the displacement change value on the deformation coefficient; the preset position coefficient τ at the position point k k The setting is selected according to the state of the deformation range of different position points, which will not be described in detail here.

[0098] As an embodiment of the present invention, the deformation coefficient Def k Compare with the preset deformation coefficient threshold interval [Def1, Def2]:

[0099] If Def k ≤Def1, it is judged that the deformation range of the valve at the current position is small;

[0100] If Def1<Def k ≤Def2, it is judged that the deformation range of the valve at the current position is normal;

[0101] If Defk >Def2, it is judged that the deformation range at the current position of the valve is large and pressure deformation occurs.

[0102] In the above technical scheme, this embodiment calculates the deformation coefficient results of each point, sets the deformation range according to different position points, and judges the pressure deformation for the situation exceeding the preset threshold range. In this embodiment, it is assumed that a total of n valve detection position points are selected, and the proportion of the number of points x that produce deformation exceeds half of n, then it is judged that the probability of deformation at the inner wall of the current valve is relatively large, and it is relatively small if it is lower than the set proportion. The size of this proportion is selected and set according to the specific valve component running machine valve material selection, which will not be elaborated here.

[0103] As an embodiment of the present invention, the control and regulation unit includes:

[0104] The adjustment calculation formula for the valve component detection position is:

[0105] Calculate the moving distance ΔP; where n is the total number of balance test points, j∈[1,n]; m ij is the fluid flow rate at the jth position; D ij is the difference between the pressure values ​​at both ends of the valve assembly at the jth position when the fluid is continuously filled;

[0106] K is the judgment function, judging when When; then K=A;

[0107] otherwise,

[0108] Q th is the allowable threshold; A is the fixed adjustment value.

[0109] In the above technical solution, the control and adjustment unit in this embodiment includes adjusting the detection position of the valve assembly to achieve the position adjustment of the valve during the balance test. The adjustment direction is to adjust the position in the horizontal direction to adapt to the internal pressure supply of the balance test. The adjustment calculation method of the valve assembly detection position includes the formula Calculate the moving distance ΔP and adjust the direction according to the moving distance. The adjustment distance is based on the difference D0 and D between the pressure values ​​at both ends of the valve component. ij The change of the judgment is judged, and the adjustment distance is judged by the judgment function K to adjust the moving distance. The specific judgment is When; then K=A; otherwise, The fixed adjustment value A is an automatic adjustment control based on the preset adjustment mechanism of the system, which does not require manual input of information for debugging. The calculated K is the calculation judgment function of the actual adjustment distance to ensure the accuracy of the moving distance ΔP. The allowable threshold Q th It is obtained by fitting based on historical experience data.

[0110] As an implementation mode of the present invention, the calculation formula for adjusting the valve opening is:

[0111] Opening adjustment ratio r formula:

[0112]

[0113] Valve opening x formula:

[0114] x=r(x max -x min )+x min ;

[0115] Among them, m max is the flow rate corresponding to the maximum opening; m min is the flow rate corresponding to the minimum opening; x max is the maximum opening value; x min is the minimum opening value.

[0116] In the above technical scheme, the calculation of the size of the regulating valve opening in this embodiment follows the size of the incoming flow rate to determine the size of the valve opening. Specifically, the adjustment ratio is first determined and the valve opening is determined based on the adjustment ratio. The maximum opening and the minimum opening are both pre-set and determined based on the specific size of the internal opening of the valve.

[0117] The system also includes:

[0118] The result evaluation unit is used to input the historical deformation detection analysis results into the evaluation model to output the evaluation results, and judge the stability and pressure resistance of the valve component according to the evaluation results to ensure the safety and sealing of the valve under high pressure conditions.

[0119] In the above technical solution, a pre-set evaluation model is used in this embodiment to evaluate the stability and pressure resistance of the valve assembly, so as to ensure that it has sufficient safety and sealing under high pressure conditions.

[0120] Specifically, the result evaluation unit inputs the results of the historical deformation detection data analysis into the evaluation model for dynamic simulation, collects and organizes the results of multiple past tests, and forms a database, including the deformation, displacement, stress distribution and other parameters of the valve under different pressure states. A scientific and reasonable evaluation model is established based on a large amount of historical data and valve material properties. The model should be able to accurately reflect the relationship between pressure and deformation, and take into account the influence of factors such as material fatigue and aging; by inputting the current test data into the evaluation model and comparing it with historical data, the stability index and pressure resistance score of the valve component can be calculated.

[0121] At the same time, the model can also predict the performance evaluation results of the valve under higher or more extreme pressure environments, determine whether the valve can withstand the expected working pressure without deformation or leakage, and ensure that its safety and sealing meet industry standards and specifications.

[0122] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0123] The above specific embodiments of this specification are described. Other embodiments are within the scope of the attached documents. In some cases, the actions or steps recorded in this application can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0124] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in this application, they shall all fall within the protection scope of the present invention.

Claims

1. A valve internal pressure deformation detection system, characterized in that: include: A horizontally arranged valve assembly; a first sealing device and a second sealing device are matched and fixed at the openings at the front and rear ends of the valve assembly, and a first pressure sensor and a second pressure sensor are respectively arranged inside the first sealing device and the second sealing device near the valve assembly; the first sealing device and the second sealing device also include valve sealing materials; the valve sealing materials are arranged at the connection between the first sealing device and the second sealing device and the valve assembly respectively; A balance test unit, used to obtain pressure values ​​at both ends of the valve assembly through a first pressure sensor and a second pressure sensor, and perform a balance test according to the pressure values ​​at both ends; A deformation detection unit, used to obtain a preset strain gauge resistance change value and a displacement change value of a displacement sensor on the surface of a valve sealing material to perform deformation detection of valve pressure; A data acquisition unit, used to acquire data information received by the first pressure sensor, the second pressure sensor, the strain gauge, and the position sensor; The data analysis unit is used to determine whether the balance of the valve assembly meets the requirements based on the balance test analysis: If yes, deformation detection analysis is performed; If not, suspend the balance test and enter the control and adjustment unit; And used to determine whether the deformation coefficient at the preset position of the valve meets the requirements based on deformation detection analysis: If not, it is determined that the valve has pressure deformation, and pressure relief is performed and the control and adjustment unit is entered; A control and adjustment unit, used to adjust the horizontal test position of the valve assembly through a driver and receive a control signal to move the valve shaft to adjust the valve opening inside the valve assembly; The balance test method comprises: Collect the pressure values ​​at both ends of the valve assembly that is continuously filled with gas within a preset test time period, and calculate the difference D0 between the pressure values ​​at both ends; Collect the pressure values ​​at both ends of the valve assembly that is continuously filled with fluid during the preset test period, and calculate the difference D between the pressure values ​​at both ends i ; Obtain a curve E0 showing the difference D0 changing with time within a preset time period; Get the difference D within the preset time period i The curve E changes with time i ; The curve E0 and the curve E i Constructed in the same coordinate system, compare curve E0 and curve E i The size of the overlap area value ΔS: If ΔS is greater than the preset threshold, it is judged that the balance inside the current valve is good; Otherwise, it is judged that the balance inside the current valve is poor.

2. A valve internal pressure deformation detection system according to claim 1, characterized in that: The balance test is implemented by providing an operation interface to the user for testing through the control instructions of the control program. The control flow of the control instructions is as follows: S1, perform control program initialization processing; S2. Start the test, pressurize the inside of the single-side sealing device through an external pressure source, simulate the pressure state of the valve component in actual gas operation, and determine whether an abnormality occurs. If so, complete the alarm processing, otherwise proceed to the next step; S3, based on step S2, the external fluid is passed through the single-side sealing device to pressurize the inside of the valve assembly, simulating the pressure state of the valve assembly in actual liquid work, and judging whether an abnormality occurs. If so, the alarm processing is completed, otherwise, the next step is entered; S4, based on step S3, enter the balance test, determine whether to start the automatic test state, if so, continue to run, otherwise stop the test and return to step S1.

3. A valve internal pressure deformation detection system according to claim 1, characterized in that: The deformation detection analysis method is: By formula Calculate the deformation coefficient Def at the valve position point k k ; Wherein, μ1 is the first preset weight coefficient, μ2 is the second preset weight coefficient, and both μ1 and μ2 are greater than 0; Q ρ is the elastic modulus of the sealing material; ΔR is the resistance change value of the strain gauge; R0 is the standard resistance change value of the strain gauge; s is the sensitivity coefficient of the strain gauge; ΔL is the displacement change value; L0 is the standard displacement change value; τ k is the preset position coefficient at position point k.

4. A valve internal pressure deformation detection system according to claim 3, characterized in that: The deformation coefficient Def k Compare with the preset deformation coefficient threshold interval [Def1, Def2]: If Def k ≤Def1, it is judged that the deformation range of the valve at the current position is small; If Def1<Def k ≤Def2, it is judged that the deformation range of the valve at the current position is normal; If Def k >Def2, it is judged that the deformation range at the current position of the valve is large and pressure deformation occurs.

5. A valve internal pressure deformation detection system according to claim 1, characterized in that: The control and adjustment unit comprises: The adjustment calculation formula of the valve assembly detection position is: Calculate the moving distance ΔP; where n is the total number of balance test points, j∈[1,n]; m ij is the fluid flow rate at the jth position; D ij is the difference between the pressure values ​​at both ends of the valve assembly at the jth position when the fluid is continuously filled; K is the judgment function, judging when When; then K=A; otherwise, Q th is the allowable threshold; A is the fixed adjustment value.

6. A valve internal pressure deformation detection system according to claim 5, characterized in that: The calculation formula for adjusting the valve opening is: Opening adjustment ratio r formula: Valve opening x formula: x=r(x max -x min )+x min ; Among them, m max is the flow rate corresponding to the maximum opening; m min is the flow rate corresponding to the minimum opening; x max is the maximum opening value; x min is the minimum opening value.

7. A valve internal pressure deformation detection system according to claim 1, characterized in that: The system further comprises: The result evaluation unit is used to input the historical deformation detection analysis results into the evaluation model to output the evaluation results, and judge the stability and pressure resistance performance of the valve component according to the evaluation results.

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