Portable valve opening and closing torque testing device and testing method

Abstract

The application discloses a portable valve opening and closing torque testing device and a testing method. The testing device comprises a mounting bracket module and an electric control module. A vertical feeding adjusting module is mounted on the mounting bracket module. A torque testing transmission module is arranged on the vertical feeding adjusting module. A valve clamping and positioning module for fixing a valve to be tested is arranged below the torque testing transmission module. The electric control module is used for controlling the working of the vertical feeding adjusting module and the torque testing transmission module and performing testing data analysis. The device is used for testing and experiment of the valve rod torque when the valve is opened and closed. The device is compact in structure, convenient to move, adjustable in height and adjustable in the centering position during measurement, and is suitable for portable torque measurement experiment of various specifications of valves.

Description

Technical Field

[0001] This invention relates to a portable valve opening and closing torque testing device and method, belonging to the technical field of valve performance testing equipment, and is particularly suitable for measuring and testing the valve stem torque of industrial valves under different operating conditions. Background Technology

[0002] As crucial components in industrial systems such as petroleum, chemical, and metallurgical industries, valves' opening and closing torque is a key parameter for evaluating valve performance and matching electric actuators. It directly affects the reliability and safety of valve operation, as well as the suitability of the selected actuator. Currently, valve torque testing equipment in the industry mainly suffers from the following shortcomings:

[0003] 1. The equipment is bulky and has poor mobility; traditional torque testing devices are mostly large fixed benches, which are bulky and complex in structure. They can only be used in laboratories or fixed workshops and cannot achieve on-site valve testing. They have obvious limitations in testing the torque of valves that have been installed on pipelines and cannot meet the needs of rapid testing in industrial fields.

[0004] 2. Insufficient testing accuracy and large coaxiality error; existing testing equipment cannot adaptively compensate for the installation coaxiality deviation between the valve shaft and the testing mechanism, which easily introduces additional bending moment and radial load, resulting in distortion of torque sensor measurement data; at the same time, most equipment lacks a high-precision linear feed adjustment mechanism, which cannot accurately adapt to the installation height of valves of different specifications, further reducing the adaptability of the equipment.

[0005] 3. Low level of automation and high data loss rate; traditional testing equipment lacks synchronous acquisition and closed-loop control of multiple parameters such as torque, angle, and speed, making it impossible to achieve continuous and automated testing of valve opening and closing torque throughout the entire stroke, and the consistency and reliability of test data are difficult to guarantee.

[0006] 4. Poor adaptability to working conditions; existing equipment is difficult to adapt to the testing requirements of valves of different specifications and types at the same time, lacks universal and modular transmission connection and installation positioning structure, resulting in poor equipment versatility and high testing costs.

[0007] Therefore, there is an urgent need for a lightweight valve opening and closing torque testing device that is structurally sound, easy to move, highly adaptable, and can effectively guarantee centering accuracy. Summary of the Invention

[0008] The purpose of this invention is to provide a lightweight valve opening and closing torque testing device, which aims to solve the defects of traditional valve torque testing equipment such as bulkiness and difficulty in movement, large coaxiality error, low testing accuracy, insufficient automation and poor versatility, so as to realize high-precision, automated and portable testing of valve opening and closing torque, while adapting to the testing needs of various valve specifications.

[0009] To solve the above technical problems, one technical solution adopted by the present invention is to provide a portable valve opening and closing torque testing device, which is used for the measurement and experiment of valve stem torque during valve opening and closing, comprising a mounting bracket module and an electric control module, wherein a vertical feed adjustment module is mounted on the mounting bracket module, a torque test transmission module is arranged on the vertical feed adjustment module, a valve clamping and positioning module for fixing the valve to be tested is arranged below the torque test transmission module, and the electric control module is used for controlling the operation of the vertical feed adjustment module and the torque test transmission module and analyzing test data;

[0010] The mounting bracket module comprises a base, a column support is vertically arranged in the middle of the base, and a slide rail mounting seat is arranged at the top of the column support;

[0011] The vertical feed adjustment module comprises a mounting seat, the lower end of the mounting seat is mounted on the slide rail mounting seat, a slide rail, a lead screw motor and a first reducer matched with the lead screw motor are vertically arranged on the mounting seat, a lead screw is vertically arranged below the first reducer, the lower end of the working output shaft of the first reducer is fixedly connected with the upper end of the lead screw through a first coupling, a torque test transmission module mounting seat is slidably arranged on the slide rail, the lead screw penetrates through the torque test transmission module mounting seat, and the lead screw is in threaded connection with the torque test transmission module mounting seat;

[0012] The torque test transmission module comprises a torsion motor and a second reducer matched with the torsion motor, a torque sensor is vertically arranged below the second reducer, the lower end of the working output shaft of the second reducer is fixedly connected with the upper end of the torque sensor through a second coupling, the lower end of the torque sensor is fixedly connected with a universal coupling, the second reducer is mounted and fixed on the torque test transmission module mounting seat, and the lower end of the universal coupling is connected with the valve stem of the valve to be tested.

[0013] Preferably, the valve clamping and positioning module comprises a base plate and two arc-shaped clamping plates, the two arc-shaped clamping plates are arranged in mirror symmetry, the base plate is mounted on the base, two ends of the base plate are respectively provided with a vertical threaded support rod, and the threaded support rods penetrate through two ends of the two arc-shaped clamping plates and are fixed with the clamping plates through nuts.

[0014] Preferably, the base is provided with a slotted hole, the base plate is mounted and connected with the slotted hole through a bolt, the slotted hole allows the base plate to adjust its horizontal mounting position, and the bolt can move to a proper position in the slotted hole.

[0015] Preferably, the electrical control module includes an electrical control cabinet, which houses a controller, a driver, and a human-machine interface terminal. The driver is connected to the lead screw motor and the torsion motor via cables, and the controller is connected to the human-machine interface terminal and the torque sensor via communication lines. The electrical control module realizes functions such as equipment operation, data storage, curve plotting, over-limit alarm, and test report generation, and can display dynamic data and change curves of torque, speed, and angle in real time.

[0016] Preferably, the lead screw is a ball screw, which is driven to rotate by a lead screw motor, enabling high-precision feed adjustment in the vertical direction and having a power-off self-locking function.

[0017] Preferably, the torsion motor is a servo motor, which, in conjunction with a high-precision second reducer, enables precise control with a wide speed range and high torque output; the torque sensor is a dynamic torque sensor; and the universal coupling has radial and angular compensation capabilities, which can compensate for the installation coaxiality deviation between the test mechanism and the valve stem, resulting in better alignment between the torque sensor and the valve stem during testing.

[0018] The present invention also provides a testing method based on the above-mentioned portable valve opening and closing torque testing device, comprising the following steps:

[0019] S1. Valve clamping: Install the valve to be tested between two clamping plates to complete the valve positioning and fixing;

[0020] S2. Initialization: Connect the electrical control cabinet to the lead screw motor, torsion motor, and torque sensor; turn on the power; start the electrical control system; and complete the equipment initialization and sensor calibration.

[0021] S3. Feed adjustment and connection: The screw motor is rotated by the electronic control system, so that the mounting base of the torque test transmission module moves along the slide rail, so that the universal coupling and the valve stem of the valve under test are coaxially connected.

[0022] S4. Parameter settings: Set parameters such as test mode, start and stop speed, number of tests, and torque limit through the human-machine interface terminal;

[0023] S5. Data acquisition: The torsion motor operates according to the set parameters, and drives the valve stem to rise and fall through the universal coupling to open and close the valve. The torque sensor collects the torque data output by the torsion motor in real time, and records the torque, speed and angle data at the same time.

[0024] S6. Data filtering: Filter out high-frequency noise and interference signals in the initial data collected in step S5;

[0025] A low-pass filter is used to remove high-frequency noise and interference signals from the initial data. The expression for the low-pass filter is as follows: ;

[0026] Where f is the signal frequency, fc is the cutoff frequency, and Hf is the frequency response of the filtered output signal;

[0027] S7. Data processing: The controller analyzes and processes the collected data to generate a test report;

[0028] S8. Reset the equipment, disconnect the valve stem from the universal coupling, remove the valve to be tested, and complete the test.

[0029] The beneficial effects of this invention are:

[0030] 1. By adopting a modular and lightweight structural design, the overall weight of the equipment is significantly reduced, enabling rapid disassembly and transportation, and allowing in-situ torque testing of installed valves, thus solving the pain point that traditional equipment cannot perform on-site testing;

[0031] 2. By using a universal coupling, the installation coaxiality deviation between the equipment and the valve stem is effectively compensated, the interference of additional load on torque measurement is eliminated, and the accuracy and reliability of test data are ensured.

[0032] 3. The controller enables dual-axis closed-loop control of vertical feed and torsional drive, precisely controlling the opening and closing speed and stroke, and realizing automated testing of valve opening and closing torque throughout the entire stroke; it also has automatic data acquisition, curve plotting, and report generation functions, greatly improving testing efficiency and data processing capabilities;

[0033] 4. With the quick-release clamp and adjustable vertical feed module, it can be adapted to various industrial valves with different diameters and installation heights. The test can be completed without changing the tooling. The equipment has strong versatility and reduces the test cost.

[0034] 5. The entire installation bracket is made of profiles and combined with the vertical feed structure guided by slide rails, which not only ensures the structural strength and operational stability of the equipment, but also realizes the miniaturization design of the equipment, making it suitable for testing scenarios in confined spaces.

[0035] The device has a compact overall structure, is easy to move, and has adjustable height and centering position during measurement. It is suitable for portable torque measurement experiments of various valve specifications. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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, wherein:

[0037] Figure 1This is a schematic diagram of the overall structure of the portable valve opening and closing torque testing device of the present invention.

[0038] Figure 2 This is a schematic diagram of the electrical control module of the portable valve opening and closing torque testing device of the present invention;

[0039] Figure 3 This is a schematic diagram of the mounting bracket module of the portable valve opening and closing torque testing device of the present invention;

[0040] Figure 4 This is a schematic diagram of the vertical feed adjustment module of the portable valve opening and closing torque testing device of the present invention.

[0041] Figure 5 This is a schematic diagram of the torque testing transmission module of the portable valve opening and closing torque testing device of the present invention;

[0042] Figure 6 This is a schematic diagram of the valve clamping and positioning module of the portable valve opening and closing torque testing device of the present invention;

[0043] Figure 7 This is a flowchart illustrating the workflow of the portable valve opening and closing torque testing device of the present invention.

[0044] Figure 8 This is a schematic diagram of the electrical control principle of the portable valve opening and closing torque testing device of the present invention.

[0045] Figure 9 This is a block diagram of the torsion motor control for the portable valve opening and closing torque testing device of the present invention;

[0046] Figure 10 This is a block diagram of the lead screw motor control for the portable valve opening and closing torque testing device of the present invention. Detailed Implementation

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Embodiments of the present invention:

[0049] This invention provides a portable valve opening and closing torque testing device. Please refer to [link / reference]. Figures 1 to 6The system includes a mounting bracket module 2 and an electrical control module 1. A vertical feed adjustment module 3 is mounted on the mounting bracket module 2. A torque test transmission module 4 is mounted on the vertical feed adjustment module 3. A valve clamping and positioning module 5 for fixing the valve under test is located below the torque test transmission module 4. The electrical control module 1 is used to control the operation of the vertical feed adjustment module 3 and the torque test transmission module 4 and to perform test data analysis.

[0050] like Figure 3 As shown, the mounting bracket module 2 includes a base 21, a vertical column bracket 22 is vertically arranged in the middle of the base 21, and a slide rail mounting seat 23 is arranged on the top of the column bracket 22. In this embodiment, the mounting bracket module 2 serves as the load-bearing base of the equipment and is formed by welding lightweight high-strength profiles, achieving lightweighting of the equipment while ensuring high load-bearing rigidity. The slide rail mounting seat 23 is connected to the top of the column bracket 22 by bolts, providing a stable installation reference for the vertical feed adjustment module 3.

[0051] like Figure 4 As shown, the vertical feed adjustment module 3 includes a mounting base 36. The lower end of the mounting base 36 is mounted on a slide rail mounting base 23. A slide rail 35, a lead screw motor 31, and a first reducer 32 matched with the lead screw motor 31 are vertically arranged on the mounting base 36. A lead screw 37 is vertically arranged below the first reducer 32. The lower end of the working output shaft of the first reducer 32 is fixedly connected to the upper end of the lead screw 37 through a first coupling 33. A torque test transmission module mounting base 34 is slidably arranged on the slide rail 35. The lead screw 37 and the slide rail 35 pass through the torque test transmission module mounting base 34. The lead screw 37 is threadedly connected to the torque test transmission module mounting base 34.

[0052] In this embodiment, the vertical feed adjustment module 3 adopts a closed-loop control scheme combining a ball screw motor 31 and an encoder, providing the torque test transmission module 4 with high-precision and high-stability vertical position adjustment capability. The linear slide rail 35 provides reliable motion guidance constraints for the torque test transmission module 4. The vertical feed adjustment module 3 adopts a precision ball screw structure, which ensures high straightness and smoothness of motion during transmission while integrating a power-off self-locking function. This effectively prevents the torque test transmission module 4 from accidentally sliding down when the equipment is powered off or malfunctions, fundamentally improving the safety and robustness of the system.

[0053] like Figure 5As shown, the torque test transmission module 4 includes a torsion motor 41 and a second reducer 42 matched with the torsion motor 41. A torque sensor 44 is vertically arranged below the second reducer 42. The lower end of the working output shaft of the second reducer 42 is fixedly connected to the upper end of the torque sensor 44 through a second coupling 43. A universal coupling 45 is fixedly connected to the lower end of the torque sensor 44. The second reducer 42 is mounted and fixed on the torque test transmission module mounting base 34. The lower end of the universal coupling 45 is connected to the valve stem 61 of the valve 60 to be tested.

[0054] In this embodiment, the torque testing transmission module 4 adopts a closed-loop testing scheme of servo drive + dynamic acquisition: the servo torsion motor 41 and the reducer 42 form a power unit to achieve high-precision and stable rated torque output; to eliminate installation coaxiality errors and transmission vibrations, a flexible second coupling 43 is used between the second reducer 42 and the torque sensor 44 to achieve a flexible connection; the output end (lower end) of the torque sensor 44 is connected to the valve stem 61 under test through a double cross-shaft universal coupling 45. This structure can effectively compensate for radial and angular deviations and avoid interference from additional bending moments on measurement accuracy. The dynamic torque sensor 44 can acquire torque, speed, and angle data in real time, providing complete closed-loop feedback for the testing process, significantly improving the testing accuracy and reliability of the system.

[0055] like Figure 6 As shown, the valve clamping and positioning module 5 includes a base plate 52 and two arc-shaped clamping plates 51. The two arc-shaped clamping plates 51 are arranged symmetrically in mirror image. The base plate 52 is mounted on the base 21. Vertical threaded support rods 53 are respectively provided at both ends of the base plate 52. The threaded support rods 53 pass through both ends of the two arc-shaped clamping plates 51 and are fixed to the clamping plates 51 by nuts 54. The valve clamping and positioning module 5 in this embodiment is adaptable to valve bodies of different diameters. No additional tooling is required during installation to complete the positioning and fixing of the valve, preventing the valve from shifting due to torque reaction force during testing and ensuring the stability of the testing process.

[0056] Preferably, the base 21 is provided with an oblong hole 24, and the base plate 52 is installed and connected to the oblong hole 24 by bolts.

[0057] Preferred, such as Figure 2 As shown, the electrical control module 1 includes an electrical control cabinet 11, which houses a controller 12, a driver 13, and a human-machine interface terminal 14. The driver 13 is connected to the lead screw motor 31 and the torsion motor 41 via cables. The controller 12 is connected to the human-machine interface terminal 14 and the torque sensor 44 via communication lines. This enables functions such as equipment operation, data storage, curve plotting, over-limit alarm, and test report generation. It can display dynamic data and change curves of torque, speed, and angle in real time.

[0058] The electrical control module 1 adopts a modular design, integrating control, drive, human-machine interaction, and protection functions: the electrical control cabinet 11 realizes the standardized integration and protection of electrical components; the controller 12 runs the control algorithm to realize closed-loop control of the equipment; the driver 13 converts control commands into motor drive signals to ensure action accuracy; the human-machine interaction terminal 14 supports the configuration of target parameters and the real-time generation of torque test curves; the status indicator lights 15 and operation buttons 16 constitute an intuitive human-machine interaction interface; the intermediate relay 17 realizes the electrical isolation and protection of the controller output port; the terminal block 18 realizes the distributed wiring of the circuit; the power supply module 19 provides a stable and reliable drive power supply; the air switch 110 serves as a circuit protection unit, effectively improving the safety and stability of the system, and a lighting lamp 111 is also provided.

[0059] Preferably, the lead screw 37 is a ball screw, which is driven to rotate by the lead screw motor 31 to achieve high-precision feed adjustment in the vertical direction and has a power-off self-locking function.

[0060] Preferably, the torsion motor 41 is a servo motor, which, together with the high-precision second reducer 42, can achieve precise control with a wide speed range and high torque output; the torque sensor 44 is a dynamic torque sensor; the universal coupling 45 has radial and angular compensation capabilities, which can compensate for the installation coaxiality deviation between the test mechanism and the valve stem.

[0061] When the portable valve opening and closing torque testing device of the present invention is in operation, the fixed distance of the valve clamping and positioning module 5 is first determined according to the size of the valve to be tested. The valve clamping and positioning module 5 is then installed and fixed on the base 21. Next, the valve 60 is fixed between two arc-shaped clamping plates 51. The middle part of the clamping plate 51 is arc-shaped, clamping the valve 60. The two ends of the clamping plate 51 are flat. The height of the clamping plate 51 on the threaded support rod 53 is adjusted by rotating the nut 54. This allows for the installation and testing of valves of different sizes and specifications, improving the versatility of the equipment and reducing testing costs. Then, the valve is opened and closed. The lead screw motor 31 drives the lead screw 37 to rotate, thereby causing the torque test transmission module mounting base 34 to rise and fall vertically along the slide rail 3. This causes the torque test transmission module 4 to rise and fall accordingly. Adjusting the height of the torque test transmission module 4 ensures that the lower end of the universal coupling 45 is aligned with the upper end of the valve stem 61 of the valve under test 60 (this can be achieved using screws or pins). After confirming the alignment of the universal coupling 45 and the valve stem 61, the torsion motor 41 is started, driving the second reducer 42 to output torque to the torque sensor 44, the universal coupling 45, and the valve stem 61 for torque measurement. The torque data is collected in real-time by the torque sensor 44 and output to the human-machine interface terminal 14 for torque reading.

[0062] This invention also provides a test method based on the above-described portable valve opening and closing torque testing device, with reference to... Figures 7 to 10 This includes the following steps:

[0063] S1. Valve clamping: Install the valve to be tested 60 between two clamping plates 51 to complete the valve positioning and fixing;

[0064] S2. Initialization: Connect the electrical control cabinet 11 to the lead screw motor 31, torsion motor 41, and torque sensor 44. Turn on the power, start the electrical control system, and complete the equipment initialization and sensor calibration. Perform communication status, power supply status, and hardware fault detection on the controller 12 and key components such as the servo driver 13, torque sensor 44, and encoder. If communication interruption, sensor abnormality, or driver failure is detected, immediately proceed to fault diagnosis and troubleshooting. After the fault is resolved, re-execute the initialization until the self-test passes, thus avoiding equipment failure and data distortion during the testing process from the source.

[0065] S3. Feed adjustment and connection: The ball screw motor 31 is rotated by the electronic control system, which moves the torque test transmission module mounting base 34 along the slide rail 35, so that the universal coupling 45 and the valve stem 61 of the valve under test 60 are coaxially connected. After initialization, it is determined whether the coaxiality and axial position of the valve stem under test and the universal coupling 45 meet the docking requirements. If they cannot be directly docked, the vertical feed adjustment control function is activated after the deviation is manually measured. The controller 12 outputs a pulse + direction command to the ball screw motor driver 13 according to the preset position target and the encoder feedback signal, which drives the torque test transmission module mounting base 34 to drive the torque test transmission module 4 to rise and fall, so as to realize the vertical position adjustment. During the adjustment process, the system monitors the position deviation in real time and corrects the feed displacement through closed loop until the valve stem 61 and the universal coupling 45 are precisely coaxially docked, eliminating the additional influence of installation error on torque measurement.

[0066] S4. Parameter setting: Set parameters such as test mode, opening and closing speed, number of tests, and upper limit of torque through the human-machine interaction terminal 14. After the valve stem is connected, enter the test parameter setting stage. According to the specifications of the valve under test (diameter, nominal pressure, opening and closing type) and test standards, configure key control parameters such as target torque, test speed, opening and closing direction (forward / reverse), number of tests, and data acquisition frequency. In addition, the test system supports one-click saving and recall of parameters, which can adapt to the test requirements of valves with different diameters and realize the standardization and flexibility of the test process.

[0067] After parameter configuration, the system initiates the torque output pre-verification process. Controller 12, based on preset parameters, drives the servo torsion motor 41 to output a preset torque using the ADRC self-disruption torque closed-loop control algorithm. Torque sensor 44 collects output torque data in real time. The system compares the deviation between the actual torque and the target torque to determine if the output characteristics meet the test requirements. If the deviation exceeds the allowable range, the system automatically returns to the parameter setting stage, adjusts the torque control parameters or the vertical feed position of the lead screw 37, and performs pre-verification again. If the deviation is within the allowable range, the system confirms stable torque output without abnormal fluctuations and enters the formal test process. After pre-verification, the test device system automatically switches the rotation direction (forward / reverse) of the torsion motor 41 according to the preset test process and the valve's opening and closing characteristics, simulating the valve's opening and closing actions respectively. During direction switching, controller 12 smoothly adjusts the torque command using the ADRC algorithm to avoid torque shock caused by sudden direction changes, protecting the tested valve and test equipment.

[0068] S5. Testing and data acquisition: The torsion motor 41 operates according to the set parameters, and drives the valve stem 61 to rise and fall through the universal coupling 45 to open and close the valve 60. The torque sensor (44) collects the torque data output by the torsion motor (41) in real time, and records the torque, speed and angle data at the same time.

[0069] S6. Data filtering: Filter out high-frequency noise and interference signals in the initial data collected in step S5; Torque sensor 44 collects torque, speed and angle data in real time, and feeds them back to the ADRC closed-loop control loop of the controller after filtering; Extended State Observer (ESO) estimates the total disturbance such as friction disturbance and load fluctuation in real time; Nonlinear Feedback Control Law (NF) generates a correction control quantity based on torque deviation to actively compensate for disturbance and ensure that the output torque accurately tracks the target value;

[0070] A low-pass filter is used to remove high-frequency noise and interference signals from the initial data. The expression for the low-pass filter is as follows: ;

[0071] Where f is the signal frequency, fc is the cutoff frequency, and Hf is the frequency response of the filtered output signal;

[0072] S7. Data processing: The controller 12 analyzes and processes the collected data to generate a test report, which includes torque-angle curve, peak opening and closing torque, torque stability analysis and other contents.

[0073] S8. Reset the equipment, disconnect the valve stem 61 from the universal coupling 45, remove the valve 60 to be tested, and complete the test.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A portable valve opening and closing torque testing device for measuring and testing the valve stem torque during valve opening and closing, comprising a mounting bracket module (2) and an electrical control module (1), characterized in that, The mounting bracket module (2) is equipped with a vertical feed adjustment module (3), the vertical feed adjustment module (3) is equipped with a torque test transmission module (4), and a valve clamping and positioning module (5) for fixing the valve to be tested is provided below the torque test transmission module (4). The electronic control module (1) is used to control the operation of the vertical feed adjustment module (3) and the torque test transmission module (4) and to perform test data analysis. The mounting bracket module (2) includes a base (21), a column bracket (22) is vertically arranged in the middle of the base (21), and a slide rail mounting seat (23) is arranged on the top of the column bracket (22). The vertical feed adjustment module (3) includes a mounting base (36), the lower end of which is mounted on a slide rail mounting base (23). A slide rail (35), a lead screw motor (31), and a first reducer (32) matching the lead screw motor (31) are vertically arranged on the mounting base (36). A lead screw (37) is vertically arranged below the first reducer (32). The lower end of the working output shaft of the first reducer (32) is fixedly connected to the upper end of the lead screw (37) through a first coupling (33). A torque test transmission module mounting base (34) is slidably arranged on the slide rail (35). The lead screw (37) passes through the torque test transmission module mounting base (34), and the lead screw (37) is threadedly connected to the torque test transmission module mounting base (34). The torque test transmission module (4) includes a torsion motor (41) and a second reducer (42) that is matched with the torsion motor (41). A torque sensor (44) is vertically arranged below the second reducer (42). The lower end of the working output shaft of the second reducer (42) is fixedly connected to the upper end of the torque sensor (44) through a second coupling (43). A universal coupling (45) is fixedly connected to the lower end of the torque sensor (44). The second reducer (42) is mounted and fixed on the torque test transmission module mounting base (34). The lower end of the universal coupling (45) is connected to the valve stem of the valve to be tested.

2. The portable valve opening and closing torque testing device according to claim 1, characterized in that, The valve clamping and positioning module (5) includes a base plate (52) and two arc-shaped clamps (51). The two arc-shaped clamps (51) are arranged in a mirror symmetrical manner. The base plate (52) is installed on the base (21). Vertical threaded support rods (53) are respectively provided at both ends of the base plate (52). The threaded support rods (53) pass through both ends of the two arc-shaped clamps (51) and are fixed together with the clamps (51) by nuts (54).

3. The portable valve opening and closing torque testing device according to claim 2, characterized in that, The base (21) is provided with a waist-shaped hole (24), and the base plate (52) is installed and connected to the waist-shaped hole (24) by bolts.

4. The portable valve opening and closing torque testing device according to claim 3, characterized in that, The electrical control module (1) includes an electrical control cabinet (11), which is equipped with a controller (12), a driver (13) and a human-machine interaction terminal (14). The driver (13) is connected to the lead screw motor (31) and the torsion motor (41) via cables. The controller (12) is connected to the human-machine interaction terminal (14) and the torque sensor (44) via communication lines.

5. The portable valve opening and closing torque testing device according to claim 4, characterized in that, The lead screw (37) is a ball screw, which is driven to rotate by a lead screw motor (31).

6. The portable valve opening and closing torque testing device according to claim 5, characterized in that, The torsion motor (41) is a servo motor, and the torque sensor (44) is a dynamic torque sensor; the universal coupling (45) has radial and angular compensation capabilities to compensate for the installation coaxiality deviation between the test mechanism and the valve stem.

7. A test method based on the portable valve opening and closing torque testing device according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Valve clamping: Install the valve to be tested (60) between two clamping plates (51) to complete the valve positioning and fixing; S2. Initialization: Connect the electrical control cabinet (11) to the lead screw motor (31), torsion motor (41), and torque sensor (44), turn on the power, start the electrical control system, and complete the equipment initialization and sensor calibration. S3. Feed adjustment and connection: The screw motor (31) is rotated by the electronic control system, so that the torque test transmission module mounting base (34) moves along the slide rail (35) and the universal coupling (45) and the valve stem (61) of the valve to be tested (60) are coaxially connected. S4. Parameter settings: Test mode, start and stop speed, number of tests, and torque limit parameters are set through the human-machine interaction terminal (14); S5. Data acquisition: The torsion motor (41) operates according to the set parameters, and drives the valve stem (61) to rise and fall through the universal coupling (45) to open and close the valve (60). The torque sensor (44) collects the torque data output by the torsion motor (41) in real time, and records the torque, speed and angle data at the same time. S6. Data filtering: Filter out high-frequency noise and interference signals in the initial data collected in step S5; A low-pass filter is used to remove high-frequency noise and interference signals from the initial data. The expression for the low-pass filter is as follows: ; Where f is the signal frequency, fc is the cutoff frequency, and Hf is the frequency response of the filtered output signal; S7. Data processing: The controller (12) analyzes and processes the collected data and generates a test report; S8. Reset the equipment, disconnect the valve stem (61) from the universal coupling (45), remove the valve to be tested (60), and complete the test.

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