Valve performance detection system and method thereof

Abstract

The invention relates to the technical field of valve testing, in particular to a valve performance detection system and method, and the system comprises a self-adaptive clamping module, a multi-parameter sensing module, an environment simulation module, a valve driving module, a safety protection module and a control and data processing module. The self-adaptive clamping module achieves valve positioning and sealing through shape memory alloy sealing and three-jaw positioning. The multi-parameter sensing module is used for acquiring fluid, mechanics, temperature and leakage signals; the environment simulation module is used for providing a temperature and pressure testing environment; the valve driving module adopts the combination of a servo motor and a precise speed reducer to realize high-precision driving; the safety protection module guarantees the test safety through an overpressure protection valve, an overtemperature alarm and an emergency stop button; the control and data processing module synchronously processes data and diagnoses faults based on an expert knowledge base. The problems that a special valve is poor in clamping, parameter collection is incomplete, and extreme working conditions are difficult to simulate are solved.

Description

Technical Field

[0001] This invention relates to the field of valve testing technology, and in particular to a valve performance testing system and method. Background Technology

[0002] Early valve performance testing relied entirely on a combination of manual operation and rudimentary instruments. Testers had to manually operate pumps to pressurize the valves, visually observing the pressure gauge readings to estimate leaks, and using primitive methods like listening or applying soapy water to pinpoint external leaks. They also used stopwatches, rulers, and other basic tools to measure valve opening and closing times and stroke distances. This method was highly subjective, inaccurate, and inefficient, and could only assess basic sealing and flow capacity, failing to comprehensively test key performance indicators such as mechanical strength, temperature and pressure resistance, and flow regulation accuracy.

[0003] With advancements in industrial technology and the continuous expansion of valve applications, valve operating environments have gradually extended to extreme conditions such as high temperature, cryogenics, and high pressure. Valve structures have also diversified, with the emergence of specialized structures such as regulating valves with central orifices and quick-release valves with external grooves. To meet these demands, preliminary automated testing equipment has appeared on the market, achieving mechanization and instrumentation for some testing items. However, significant limitations remain: most can only perform single-parameter testing, lacking the collaborative acquisition and analysis of multi-dimensional performance parameters; clamping often uses fixed fixtures, unable to adapt to the precise positioning and reliable sealing requirements of valves of different specifications and structures; and environmental simulation capabilities are limited, making it difficult to realistically reproduce the various extreme operating conditions faced by valves in actual operation.

[0004] Currently, valve performance testing technology has moved beyond complete reliance on manual labor. However, in terms of clamping adaptability, existing equipment lacks an adaptive mechanism capable of simultaneously achieving precise positioning and reliable sealing for valves with special structures such as center holes and slots. This can easily lead to distorted test data due to clamping deviations. Regarding parameter acquisition, existing equipment often only collects fluid parameters, neglecting crucial parameters for performance evaluation, such as clamping force, driving torque, and valve surface temperature. Furthermore, the asynchronous data acquisition between different sensors severely impacts the accuracy of multi-physics coupling analysis. In terms of operating condition simulation capabilities, the temperature control range of existing equipment cannot meet the testing requirements of extreme conditions such as cryogenic, ultra-high temperature, and ultra-high pressure. Additionally, switching test media is inconvenient, making it difficult to adapt to the testing requirements of different media such as water, hydraulic oil, and compressed air. In terms of intelligence and safety, the control units of existing systems mostly only perform simple data recording and calculation, lacking intelligent fault diagnosis functions based on multi-parameter fusion. Safety protection measures are often limited to emergency stop buttons, without systematic protection devices designed for risks such as overpressure and overtemperature.

[0005] Chinese invention patent CN111999011B discloses a valve performance testing system. This invention achieves airtightness testing through a gas booster pump, multiple pressure transmitters, and a helium mass spectrometer leak detector, solving the problems of limited functionality and large manual operation errors in existing equipment. However, this invention does not address the valve slot clamping scheme with a center hole and a clamping structure, and can only detect the single parameter of leakage rate, resulting in insufficient temperature range adaptability.

[0006] Therefore, this invention discloses a valve performance testing system and method. Summary of the Invention

[0007] The purpose of this invention is to address the problems in the prior art, such as poor compatibility of clamping valves with special structures having a center hole and a slot, insufficient comprehensiveness and synchronicity in collecting valve performance test parameters, and lack of ability to simulate extreme working conditions. Therefore, this invention proposes a valve performance test system and method.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a valve performance testing system, comprising:

[0009] Adaptive clamping module, multi-parameter sensing module, environmental simulation module, valve drive module, safety protection module, and control and data processing module;

[0010] The adaptive clamping module is used to position and seal the valve under test;

[0011] The multi-parameter sensing module is installed on the valve under test and its test pipeline to collect data on physical parameters related to the performance of the valve under test.

[0012] The environmental simulation module is used to provide a controllable temperature and pressure testing environment for the valve under test;

[0013] The valve drive module is used to connect to and drive the actuator of the valve under test, so that it operates according to a preset program;

[0014] The security protection module is used to protect the system and operators during the testing process;

[0015] The control and data processing module is used to coordinate and control the entire test process, synchronously collect and process the data of the physical parameters, and output a performance evaluation report based on the processing results.

[0016] A valve performance testing method, the method comprising:

[0017] S1: Position and seal the valve under test;

[0018] S2: Set the type of test medium, target temperature, target pressure, and the action program of the valve under test;

[0019] S3: Build and stabilize the test environment, drive the valve under test to act according to the action program, and simultaneously collect data on physical parameters related to the performance of the valve under test;

[0020] S4: Process and analyze the data of the physical parameters, calculate the flow coefficient and leakage rate performance parameters based on them, and perform fault diagnosis;

[0021] S5: Generate a performance evaluation report.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention constructs a wide-temperature-range and high-pressure environment simulation unit and supports multiple test media such as water, hydraulic oil and compressed air, which can realistically reproduce various extreme working conditions of valves and overcome the shortcomings of existing equipment in terms of limited working condition simulation range and inconvenient medium switching.

[0024] This invention, by employing a high-precision servo drive system, enables precise valve control and slow-opening / slow-closing testing, providing core assurance for high-precision flow characteristic testing.

[0025] This invention introduces an intelligent diagnostic unit based on an expert knowledge base and threshold rules, which can perform fusion analysis on multiple parameters such as acoustic emission signals and torque fluctuations, realize automatic judgment of fault types, and significantly improve the intelligence level of the detection process.

[0026] This invention, by configuring a multi-layered safety protection module including an overpressure protection valve and an overtemperature alarm, can achieve proactive protection against risks such as overpressure and overtemperature during testing, effectively ensuring the safety of the system and personnel.

[0027] This invention integrates data synchronization, performance calculation, intelligent diagnosis, and report generation units, enabling it to automatically complete the entire process from data acquisition to report output, ultimately forming an integrated, automated, high-performance testing solution. Attached Figure Description

[0028] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the system configuration provided in an embodiment of the present invention;

[0030] Figure 2This is a schematic diagram of the method flow provided in an embodiment of the present invention. Detailed Implementation

[0031] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a valve performance testing system and method according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] The following description, in conjunction with the accompanying drawings, details the specific scheme of the valve performance testing system and method provided by the present invention.

[0035] Example

[0036] An embodiment of the present invention provides a valve performance testing system, comprising:

[0037] Adaptive clamping module, multi-parameter sensing module, environmental simulation module, valve drive module, safety protection module, and control and data processing module;

[0038] An adaptive clamping module is used to position and seal the valve under test;

[0039] A multi-parameter sensing module is installed on the valve under test and its test pipeline to collect data on physical parameters related to the performance of the valve under test.

[0040] The environmental simulation module is used to provide a controllable temperature and pressure testing environment for the valve under test.

[0041] The valve drive module is used to connect to and drive the actuator of the valve under test, so that it operates according to a preset program;

[0042] The safety protection module is used to protect the system and operators during the testing process;

[0043] The control and data processing module is used to coordinate and control the entire testing process, synchronously collect and process physical parameter data, and output a performance evaluation report based on the processing results.

[0044] Please refer to Figure 1This is a schematic diagram of the system configuration provided in an embodiment of the present invention.

[0045] I. Adaptive clamping module:

[0046] The adaptive clamping module includes:

[0047] The sealing unit is made of shape memory alloy and achieves a seal by forming an interference fit with the sealing surface of the valve under test through thermal deformation.

[0048] The positioning unit includes a jaw that can be independently driven by a servo motor. The jaw extends and retracts radially to center and clamp the valve being measured.

[0049] The sealing unit is used to mate with the inner wall of the center hole of the valve being tested;

[0050] The positioning unit includes three arc-shaped jaws evenly distributed along the circumference, with a radial extension stroke of 0-50mm. The jaws are used to engage with the groove structure on the outside of the valve being tested.

[0051] It should be noted that the core function of the positioning unit is to achieve rapid centering and reliable clamping of the valve under test. The radial extension stroke of the jaws is 0-50mm, which is sufficient to cover the dimensional fluctuations of the outer edge of most common valves. The end of the jaws is designed with a specific profile for engaging with the groove structure on the outside of the valve under test. This engagement method ensures that the valve will not rotate circumferentially or move axially during the test.

[0052] The servo motor drive can monitor and provide feedback on the clamping force in real time, and precisely control the clamping force within a safe range of 100N to 300N. This ensures the reliability of clamping and avoids damage to the valve's external slot or the clamping module itself due to excessive clamping force.

[0053] Shape memory alloys exhibit thermal deformation characteristics. In their initial low or room temperature state, the outer diameter of the sealing unit is slightly smaller than the inner diameter of the valve's central bore, facilitating smooth insertion. When a seal is required, the sealing unit, made of shape memory alloy, is heated using an electric heating element integrated within the sealing unit or an external hot air gun. When the temperature rises above its austenitic phase transformation completion temperature, the sealing unit undergoes radial expansion, forming an interference fit with the inner wall of the valve's central bore, thus achieving a reliable seal. The diameter expansion can be designed between 10% and 30% depending on the material and processing technology.

[0054] The advantage of using shape memory alloys lies in their uniform and controllable expansion, which can adapt well to minute changes in pore size and provide an adaptive sealing method that is superior to traditional static seals such as O-rings.

[0055] During operation, the positioning unit's claws first extend radially and engage with the valve's external groove to complete the valve's centering and clamping. Then, the sealing unit is activated to cause thermal deformation, pressing against the inner wall of the valve's central hole to form a seal.

[0056] II. Multi-parameter sensing module:

[0057] The multi-parameter sensing module includes:

[0058] The fluid parameter acquisition unit includes an electromagnetic flow meter and a pressure sensor for measuring flow rate and pressure;

[0059] The mechanical parameter acquisition unit includes a tension sensor and a torque sensor for measuring clamping force and driving torque;

[0060] Temperature parameter acquisition unit, including an infrared thermometer and thermocouple for measuring the temperature of valve surface and medium;

[0061] The leak signal acquisition unit includes an acoustic emission sensor and a helium mass spectrometer leak detector for detecting leaks;

[0062] The pressure sensor has a range of 0-100MPa and a sampling frequency of ≥500Hz;

[0063] The acoustic emission sensor has a frequency response range of 10-500kHz; the helium mass spectrometer leak detector has a minimum detectable leak rate ≥1×10⁻¹ 0 Pa·m³ / s.

[0064] It should be noted that the fluid parameter acquisition unit is responsible for monitoring the core parameters of the test medium flowing through the valve, including:

[0065] Electromagnetic flowmeter: Installed in the test pipeline, it is used to accurately measure the volumetric flow rate of liquid. It has high measurement accuracy, fast response speed, and little impact on the flow pattern.

[0066] Pressure sensors: This includes at least two high-precision, high-frequency-response pressure sensors, installed on the inlet and outlet pipes of the valve under test, respectively, to measure the pressure upstream and downstream of the valve. The selected pressure sensors have a range of 0-100 MPa to meet high-pressure testing requirements; their sampling frequency is ≥500 Hz to ensure the capture of rapid pressure transients, providing data support for calculating the dynamic flow coefficient.

[0067] The mechanical parameter acquisition unit is used to monitor the mechanical state during clamping and driving processes, including:

[0068] Tension sensor: Integrated into the drive arm or transmission chain of the jaws of the adaptive clamping module, it is used to monitor the clamping force applied to the valve in real time during the clamping process. This data can be used to achieve closed-loop precise control of the clamping force to prevent over-clamping or insufficient clamping force.

[0069] Torque sensor: Installed between the precision reducer of the valve drive module and the valve stem, it is used to directly measure the actual torque value required to drive the valve to open and close. This data is the core basis for calculating the valve opening and closing torque and judging whether there are faults such as jamming.

[0070] The temperature parameter acquisition unit is used to monitor the temperature of the valve body and the test medium, including:

[0071] Thermocouple: It uses contact measurement and is installed in the test pipeline to directly and accurately measure the temperature of the test medium flowing through the valve;

[0072] Infrared thermometer: It adopts non-contact measurement, pointing at the outer surface of the valve being tested, and is used to monitor the temperature distribution on the valve surface in real time. It is suitable for high and low temperature extreme environment simulation tests and can avoid the installation difficulties and temperature resistance limitations of contact measurement.

[0073] The leakage signal acquisition unit uses two complementary sensors to achieve qualitative and quantitative detection of leaks:

[0074] Acoustic emission sensor: Installed on the surface of the valve body of the valve being tested, when the valve leaks, the high-pressure medium ejected will generate stress waves in a specific frequency range. The acoustic emission sensor can detect these signals and can be used to preliminarily determine the occurrence and approximate location of the leak.

[0075] Helium mass spectrometer leak detector: a high-precision quantitative leak detection device that uses a dedicated sampling probe to extract gas samples from potential leak points in the valve being tested and sends the gas samples into the main unit of the leak detector for analysis.

[0076] III. Environment Simulation Module:

[0077] The environment simulation module includes:

[0078] Temperature control unit, used to provide a temperature environment ranging from -196℃ to 650℃;

[0079] Pressure control unit, used to provide a pressure environment in the range of 0-60MPa;

[0080] The media supply unit is used to provide test media, including water, hydraulic oil, and compressed air.

[0081] It should be noted that the temperature control unit is used to provide a wide-range controllable temperature environment, including a closed temperature chamber or a temperature control jacket that wraps the test pipeline, and exchanges heat with the medium in the test area through a cooling and heating system.

[0082] Deep cryogenic environments are achieved by injecting cryogenic refrigerants such as liquid nitrogen into the chamber or jacket. The vaporization of liquid nitrogen absorbs heat and rapidly and stably lowers the ambient temperature to ultra-low temperature levels.

[0083] In high-temperature environments, the test area is heated by means of resistance heating wire, heating rod or circulating high-temperature heat transfer oil. The temperature chamber must be made of ceramic fiber and equipped with a wind circulation system to ensure temperature uniformity.

[0084] The range of -196℃ to 650℃ covers the extreme operating temperature scenarios for the vast majority of industrial valves.

[0085] The pressure control unit provides a high-pressure, controllable environment. Its core power source may include a pneumatic booster pump, a hydraulic booster pump, or an electric piston pump. The process is as follows: the power pump draws the test medium from the medium supply unit and pumps it into a high-pressure accumulator or pressure stabilizing tank to eliminate pressure pulsations. Subsequently, a high-precision electro-hydraulic proportional valve or pressure reducing valve precisely regulates the pressure of the medium output to the test pipeline.

[0086] The media supply unit is used to provide and switch different test media to the testing system to simulate different application scenarios of the valve, including:

[0087] Multiple independent media storage tanks are used to store different media such as water, hydraulic oil, and compressed air;

[0088] A set of multi-way valves and supply pipelines can switch the required test medium from the corresponding storage tank to the inlet of the pressure control unit by controlling the opening and closing of the valves.

[0089] For gaseous media, the storage tank is a high-pressure gas cylinder; for liquid media, the storage tank can be equipped with a level gauge and a transfer pump.

[0090] The three units do not work independently, but are controlled collaboratively by the control and data processing module. After the user sets the target temperature, pressure and medium type on the human-machine interface, the control and data processing module automatically executes the following process: first, it switches to the target medium and fills and vents the pipeline, then it starts the pressure control unit to raise the pressure to the target pressure, and at the same time starts the temperature control unit to adjust the environment to the target temperature, and maintains the stability of these parameters throughout the test.

[0091] IV. Valve Drive Module:

[0092] The valve drive module adopts a combination of servo motor and precision reducer. Its output torque adjustment range is 0-1000 N·m, the stepless speed range is 0.1-30 r / min, and the valve opening control accuracy is ±0.1%FS.

[0093] It should be noted that the valve drive module, as the core execution unit for achieving precise motion control of the valve under test, uses a servo motor to provide high-precision speed and direction control, while the precision reducer amplifies torque and adjusts speed, enabling the module's output torque to be adjusted from 0-1000 N·m, which can adapt to different drive requirements from micro-control valves to large industrial valves. The stepless speed range is designed to be 0.1-30 r / min, which not only meets the fine operation requirements of low flow rate characteristic testing of valves at 0.1 r / min, but also enables rapid performance verification at conventional switching speeds.

[0094] The valve opening control accuracy is ±0.1%FS. This accuracy is guaranteed by the closed-loop feedback control of the servo motor and the precise transmission of the reducer. This ensures that the valve accurately reaches the target position during segmented opening tests and full-stroke switching tests, providing a stable action reference for the multi-parameter sensing module to collect performance data such as flow and pressure at different opening degrees.

[0095] V. Safety Protection Module:

[0096] The security protection module includes:

[0097] An overpressure protection valve is used to automatically release pressure when the pressure in the test pipeline exceeds a first safety threshold.

[0098] An over-temperature alarm is used to trigger an audible and visual alarm when the ambient temperature exceeds a second safety threshold.

[0099] The emergency stop button is used to manually trigger the system in an emergency to cut off the power supply.

[0100] It should be noted that the safety protection module, as a risk control unit during system operation, provides safety assurance for equipment and operators through a multi-dimensional protection mechanism.

[0101] The overpressure protection valve is directly installed on the test pipeline at the inlet or outlet of the valve under test. Essentially, it is a mechanical safety valve. Its first safety threshold is preset based on the maximum permissible working pressure of the environmental simulation module, typically set to 1.05 to 1.1 times the system's rated maximum working pressure. When the pressure of the medium in the pipeline exceeds this safety threshold due to control failure or other reasons, the overpressure protection valve automatically opens, creating a pressure relief channel to discharge excess medium from the system, thereby preventing the pipeline, valve, or other pressure-bearing components from permanent deformation or rupture due to overload.

[0102] The over-temperature alarm receives real-time signals from the temperature sensor in the multi-parameter sensing module. Its second safety threshold is preset according to experimental requirements and the temperature resistance of the equipment, typically set to 5-10°C above the maximum allowable operating temperature of the environmental simulation module. When the ambient temperature or medium temperature exceeds this threshold, the over-temperature alarm will immediately activate the buzzer and flashing light, issuing a clear and intuitive warning signal to the operator, prompting them to conduct manual inspection and handling, thereby preventing system damage due to prolonged operation at excessive temperatures.

[0103] The emergency stop button is a normally closed, self-locking red button that conforms to safety regulations. It is installed in the most conspicuous and easily accessible position on the control panel. The emergency stop button is directly connected in series in the system's main circuit or control circuit. Regardless of the system's state, if the operator discovers an emergency such as a media leak, abnormal sound, or abnormal equipment movement, pressing the emergency stop button will directly cut off the power supply to all power-actuated components such as servo motors, pressure pumps, and heaters, forcing the system to immediately stop all operations and depressurize.

[0104] VI. Control and Data Processing Module:

[0105] The control and data processing module includes:

[0106] The data synchronization unit is used to receive and synchronize physical parameter data from the multi-parameter sensing module;

[0107] The performance calculation unit is used to calculate performance parameters based on physical parameter data. Performance parameters include flow coefficient and leakage rate.

[0108] The intelligent diagnostic unit is used to determine the fault type based on the acoustic emission signal, drive torque fluctuation and clamping force difference, according to the preset expert knowledge base and threshold comparison rules, and output the fault diagnosis result.

[0109] The report generation unit is used to generate and output a performance evaluation report based on performance parameters and fault diagnosis results.

[0110] It should be noted that the data synchronization unit is fundamental to ensuring the validity of all analytical data, as it receives raw signals from all sensors in the multi-parameter sensing module.

[0111] Due to the different response characteristics and installation locations of each sensor, their data streams naturally exhibit time differences. The data synchronization unit uses hardware triggering or high-precision software time stamping technology to assign a unified timestamp to all data channels. A synchronization trigger signal is emitted the instant the valve drive module begins operation, initiating data acquisition from all sensors. This ensures that parameters such as torque, flow rate, and pressure are strictly aligned on the time axis, providing an accurate data foundation for subsequent multi-parameter correlation analysis.

[0112] The performance calculation unit calculates the valve's core performance indicators based on synchronized physical parameter data and through a built-in algorithm model.

[0113] Flow coefficient calculation: Using synchronously collected flow rate, pressure difference and medium temperature data, the flow coefficient of the valve at a specific opening degree is calculated.

[0114] Leakage rate calculation: During the pressure holding phase of the sealing test, the attenuation curve of the pressure sensor data is monitored. The leakage rate of the valve is accurately calculated by using the pressure drop method or by directly using the reading of the helium mass spectrometer leak detector in the leakage signal acquisition unit, and it is determined whether the valve meets the sealing level standard.

[0115] The intelligent diagnostic unit has a pre-built expert knowledge base and rules formed from the experience of domain experts, for example:

[0116] Rule 1: If the "drive torque" value exceeds the limit and the "acoustic emission signal" energy surges in a specific frequency band, it is diagnosed as "valve core jamming or damage";

[0117] Rule 2: If the "drive torque" is normal but the "leakage rate" exceeds the limit, the diagnosis is "sealing surface failure";

[0118] Rule 3: If the clamping force value fluctuates abnormally or falls below the set value, it is diagnosed as a risk of "clamping loose".

[0119] Based on the quantitative results from the performance calculation unit and the qualitative conclusions from the intelligent diagnostic unit, the report generation unit calls a preset Word or PDF report template, automatically fills in all key data, generates trend curves, attaches diagnostic conclusions, and generates a final qualification / disqualification judgment, forming a complete, standardized, and traceable valve performance evaluation report.

[0120] Please refer to Figure 2 This is a schematic diagram of the method flow provided in an embodiment of the present invention.

[0121] A valve performance testing method includes the following steps:

[0122] S1: Position and seal the valve under test;

[0123] S2: Set the type of test medium, target temperature, target pressure, and the action program of the valve under test;

[0124] S3: Build and stabilize the test environment, drive the valve under test to act according to the action program, and simultaneously collect data on physical parameters related to the performance of the valve under test;

[0125] S4: Process and analyze the physical parameter data, calculate the flow coefficient and leakage rate performance parameters based on them, and perform fault diagnosis;

[0126] S5: Generate a performance evaluation report.

[0127] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A valve performance testing system, characterized in that, include: Adaptive clamping module, multi-parameter sensing module, environmental simulation module, valve drive module, safety protection module, and control and data processing module; The adaptive clamping module is used to position and seal the valve under test; The multi-parameter sensing module is installed on the valve under test and its test pipeline to collect data on physical parameters related to the performance of the valve under test. The environmental simulation module is used to provide a controllable temperature and pressure testing environment for the valve under test; The valve drive module is used to connect to and drive the actuator of the valve under test, so that it operates according to a preset program; The security protection module is used to protect the system and operators during the testing process; The control and data processing module is used to coordinate and control the entire test process, synchronously collect and process the data of the physical parameters, and output a performance evaluation report based on the processing results.

2. The valve performance testing system according to claim 1, characterized in that, The adaptive clamping module includes: The sealing unit is made of shape memory alloy and achieves a seal by forming an interference fit with the sealing surface of the valve under test through thermal deformation. The positioning unit includes a jaw that can be independently driven by a servo motor. The jaw extends and retracts radially to center and clamp the valve being tested.

3. The valve performance testing system according to claim 2, characterized in that, The sealing unit is used to mate with the inner wall of the center hole of the valve being tested; The positioning unit includes three arc-shaped jaws evenly distributed along the circumference, with a radial extension stroke of 0-50mm. The jaws are used to engage with the groove structure on the outside of the valve being tested.

4. The valve performance testing system according to claim 1, characterized in that, The multi-parameter sensing module includes: The fluid parameter acquisition unit includes an electromagnetic flow meter and a pressure sensor for measuring flow rate and pressure; The mechanical parameter acquisition unit includes a tension sensor and a torque sensor for measuring clamping force and driving torque; Temperature parameter acquisition unit, including an infrared thermometer and thermocouple for measuring the temperature of valve surface and medium; The leak signal acquisition unit includes an acoustic emission sensor and a helium mass spectrometer leak detector for detecting leaks.

5. The valve performance testing system according to claim 4, characterized in that, The pressure sensor has a range of 0-100MPa and a sampling frequency of ≥500Hz. The frequency response range of the acoustic emission sensor is 10-500kHz; the minimum detectable leak rate of the helium mass spectrometer leak detector is ≥1×10⁻¹. 0 Pa·m³ / s.

6. The valve performance testing system according to claim 1, characterized in that, The environment simulation module includes: Temperature control unit, used to provide a temperature environment ranging from -196℃ to 650℃; Pressure control unit, used to provide a pressure environment in the range of 0-60MPa; A media supply unit is used to provide test media, including water, hydraulic oil, and compressed air.

7. The valve performance testing system according to claim 1, characterized in that, The valve drive module adopts a combination of servo motor and precision reducer. Its output torque adjustment range is 0-1000 N·m, the stepless speed range is 0.1-30 r / min, and the valve opening control accuracy is ±0.1%FS.

8. The valve performance testing system according to claim 1, characterized in that, The security protection module includes: An overpressure protection valve is used to automatically release pressure when the pressure in the test pipeline exceeds a first safety threshold. An over-temperature alarm is used to trigger an audible and visual alarm when the ambient temperature exceeds a second safety threshold. The emergency stop button is used to manually trigger the system in an emergency to cut off the power supply.

9. The valve performance testing system according to claim 1, characterized in that, The control and data processing module includes: The data synchronization unit is used to receive and synchronize physical parameter data from the multi-parameter sensing module; A performance calculation unit is used to calculate performance parameters based on the data of the physical parameters, the performance parameters including flow coefficient and leakage rate; The intelligent diagnostic unit is used to determine the fault type based on the acoustic emission signal, drive torque fluctuation and clamping force difference, according to the preset expert knowledge base and threshold comparison rules, and output the fault diagnosis result. The report generation unit is used to generate and output a performance evaluation report based on the performance parameters and fault diagnosis results.

10. A valve performance testing method, used to implement the valve performance testing system according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Position and seal the valve under test; S2: Set the type of test medium, target temperature, target pressure, and the action program of the valve under test; S3: Build and stabilize the test environment, drive the valve under test to act according to the action program, and simultaneously collect data on physical parameters related to the performance of the valve under test; S4: Process and analyze the data of the physical parameters, calculate the flow coefficient and leakage rate performance parameters based on them, and perform fault diagnosis; S5: Generate a performance evaluation report.

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