A comprehensive high-precision water hammer test device

Abstract

The present invention provides a comprehensive high-precision water hammer test device, which relates to the technical field of water hammer test, and comprises a test bench, wherein the test bench comprises a touch screen and two protective doors, a fixing plate is fixedly connected to the lower surface of the test bench by screws, a base is movably clamped on the lower surface of the fixing plate, two fixing blocks are fixedly connected to the lower surface of the fixing plate, and connecting rings are arranged under the two fixing blocks. Liquid will encounter resistance when passing through pores or gaps, and the resistance will hinder the flow of liquid, convert the kinetic energy of the fluid into heat energy, and then absorb this part of vibration energy, further improve the shock absorption effect, reduce the interference of vibration on the precision instruments inside the test bench and the problems of component displacement and loosening, ensure the consistency of test conditions, effectively improve the stability and repeatability of the test, make the test results of different batches comparable, and also prevent the vibration from causing damage to moving parts such as solenoid valves.

Description

Technical Field

[0001] The invention belongs to the technical field of water hammer testing, and more specifically, particularly relates to a comprehensive high-precision water hammer testing device. Background Art

[0002] Water hammer test devices are of key significance in many fields, especially in systems involving fluid delivery and control, and are used to evaluate the water hammer performance of equipment such as solenoid valves. The following are some basic information about the relevant technical field and the problems existing in the existing technology. In practical applications, water hammer test devices usually include the following key parts:

[0003] 1. Pressure regulation system: responsible for providing and regulating the pressure required for the test to ensure that the test is carried out under appropriate pressure conditions, which is crucial for accurately simulating actual working conditions.

[0004] 2. Detection and control unit: Contains various sensors and controllers for accurately measuring and controlling parameters during the test process.

[0005] 3. Test pipes and connecting parts: provide flow channels for fluids and ensure reliable connections between components.

[0006] At present, there are many types of water hammer test devices or related equipment on the market. Manufacturers have adopted different technologies and designs to realize the function of water hammer test. Some manufacturers' equipment focuses on the flexibility of pressure regulation and achieves a wide range of pressure control through complex hydraulic or pneumatic systems. Some manufacturers focus on high-precision detection and use advanced sensor technology and data acquisition systems. Some test devices have special test stations for different types of solenoid valves to improve the pertinence and efficiency of the test.

[0007] However, the existing technology still has some shortcomings. In terms of solenoid valve water hammer detection, although some equipment has certain detection capabilities, most manufacturers lack equipment that can meet multiple standard tests at the same time. This makes companies face limitations in product quality assessment. Multiple devices may be required to complete comprehensive testing, which increases costs and testing complexity. In terms of heat dissipation, during the operation of existing test devices, electronic components and power equipment will generate heat. Some devices only use simple fixed heat dissipation methods, which have limited heat dissipation efficiency, low degree of automation, and cannot accurately dissipate heat. For the vibration reduction problem, the vibration generated by the test device itself during operation and the influence of external vibration sources cannot be ignored. Most existing equipment has not fully considered vibration reduction measures, or the vibration reduction effect is poor. Vibration during operation may cause The loosening and increased wear of the internal components of the equipment will affect the stability of the mechanical structure and the service life of the equipment. For precision measuring instruments, vibration will interfere with the measurement accuracy, causing deviations in the test data and making it impossible to accurately evaluate the water hammer performance of the solenoid valve. The interference of external vibration will also have an adverse effect on the test results, reducing the accuracy and repeatability of the test. Under the demand for high-precision testing, these problems are particularly prominent. In response to the above problems, this application proposes an innovative water hammer test device, which aims to solve the problems existing in the prior art, such as the single detection standard, low degree of automation, and unsatisfactory heat dissipation and shock absorption effects, improve the overall performance and test accuracy of the water hammer test device, reduce costs, and enhance the stability and reliability of the equipment, so as to provide more effective technical support for the research and development, production and quality inspection of solenoid valves and other related equipment.

[0008] In view of this, the existing structure and defects are studied and improved, and a comprehensive high-precision water hammer test device is provided to achieve a more practical purpose. Summary of the invention

[0009] In order to solve the above technical problems, the present invention provides a comprehensive high-precision water hammer testing device to solve the above problems.

[0010] A comprehensive high-precision water hammer test device comprises a test bench, the test bench comprises a touch screen and two protective doors, the lower surface of the test bench is fixedly connected to a fixing plate by screws, the lower surface of the fixing plate is movably connected to a base, the lower surface of the fixing plate is fixedly connected to two fixing blocks, a connecting ring is arranged below the two fixing blocks, the annular side surfaces of the two connecting rings are fixedly connected to two connecting shafts 1 and two L-shaped blocks, two fixing rods are fixedly connected in the test bench, a motor 1 is fixedly installed on the upper surface of the two fixing rods, screws are rotatably connected in the two fixing rods and are movably connected to the connecting blocks, connecting columns are rotatably connected on the upper surfaces of the two connecting blocks, fans are fixedly connected on the upper surfaces of the two connecting columns, two pairs of connecting shafts are rotatably connected to two connecting rods on their back faces, and slots are provided on the opposite surfaces of the two fixing rods, which are movably connected to the two connecting blocks respectively.

[0011] Preferably, the two output shafts of the motor one are respectively fixedly connected to the two screw rods, the upper surfaces of the two connecting blocks are penetrated with threaded holes, the two threaded holes are respectively threadedly sleeved with the two screw rods, the lower surfaces of the two connecting blocks are fixedly installed with motor two, and the two output shafts of the motor two are respectively fixedly connected to the two connecting columns.

[0012] Preferably, two springs 1 are fixedly connected to the lower surfaces of the two fixed blocks, and the two pairs of springs 1 are fixedly connected to the base. Two limit grooves are provided on the inner walls of the two fixed blocks, and the two pairs of limit grooves are movably engaged with the two pairs of L-shaped blocks respectively. Two dampers are fixedly installed on the lower surfaces of the two connecting rings, and the two pairs of dampers are fixedly connected to the base.

[0013] Preferably, the two groups of connecting rods have opposite ends rotatably connected with blocks, the two groups of blocks and the opposite surfaces of the two groups of connecting rods are fixedly connected with connecting shafts 2, springs 2 and telescopic rods are fixedly connected between the two groups of connecting shafts 2, and the two groups of springs 2 are movably connected to the two groups of telescopic rods respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, suitable working pressure conditions are provided for detecting the water hammer performance of solenoid valves of different specifications, and the output voltage and output pulse width can be automatically adjusted, so as to facilitate the detection of solenoid valves of different specifications and parameters. Different solenoid valves may require different driving voltages and pulse widths to control their opening and closing. This function ensures the versatility and adaptability of the device. It can be automatically detected according to the set program, and can also be switched to manual mode for manual switch detection. Automatic detection is suitable for batch testing and improves test efficiency. Manual detection is convenient for use in special circumstances or when performing detailed tests on specific solenoid valves.

[0016] In the present invention, the water inlet pressure curve is automatically drawn, and the water hammer value and the maximum value are displayed. The user can intuitively see the pressure changes during the test and key data such as the water hammer peak value, which is convenient for real-time monitoring and analysis of the test results. Various test parameters can be conveniently set, and the user can flexibly adjust according to the specific requirements of the solenoid valve being tested. The internal pressure sensor has an accuracy of 0.1% and a sampling frequency of 2200 times per second. It can accurately capture any changes in the water hammer value, ensure the accuracy and reliability of the measurement data, and meet the high-precision test requirements. As a whole, the water hammer of the solenoid valve can be detected according to three standards on one device, which greatly saves costs and improves the use efficiency of the device and the comprehensiveness of the detection.

[0017] In the present invention, liquid encounters resistance when passing through pores or gaps, and this resistance hinders the flow of the liquid, converting the kinetic energy of the fluid into heat energy, and then absorbing this part of the vibration energy, further improving the shock absorption effect, reducing the interference of vibration on the precision instruments inside the test bench and the displacement and loosening of components, ensuring the consistency of test conditions, effectively improving the stability and repeatability of the test, making the test results of different batches comparable, and also preventing vibration from causing damage to moving parts such as solenoid valves.

[0018] In the present invention, the fan rotates in a certain direction and moves up and down to make the airflow evenly cover each ventilation gap. The high-speed airflow can blow away dust, debris, etc. in the ventilation gaps to keep the gaps unobstructed. Compared with the traditional fixed heat dissipation method, the overall structure of the system can dynamically adjust the position and direction of the fan according to the actual operation conditions and temperature distribution of the device, thereby improving the cooling efficiency and effect, reducing unnecessary energy waste, and effectively preventing the performance degradation, failure or even damage of components due to overheating, thereby ensuring the stable operation of the device and the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the fixing rod structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the connection block structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the base structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the fixed block of the present invention;

[0025] Figure 7It is a schematic diagram of the connecting ring structure of the present invention.

[0026] In the figure, the correspondence between the structure names and the figure numbers is: 1. test bench; 2. touch screen; 3. base; 4. protective door; 5. fixing rod; 6. slot; 7. motor one; 8. screw; 9. connecting block; 10. fan; 11. threaded hole; 12. connecting column; 13. motor two; 14. fixing plate; 15. fixing block; 16. spring one; 17. limit groove; 18. connecting ring; 19. damper; 20. L-shaped block; 21. connecting shaft one; 22. connecting rod; 23. block; 24. connecting shaft two; 25. telescopic rod; 26. spring two. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0028] See also Figure 1 - Figure 7 The present invention provides a comprehensive high-precision water hammer test device, including a test bench 1, the test bench 1 includes a touch screen 2 and two protective doors 4, the lower surface of the test bench 1 is fixedly connected with a fixing plate 14 by screws, the lower surface of the fixing plate 14 is movably connected with a base 3, the lower surface of the fixing plate 14 is fixedly connected with two fixing blocks 15, a connecting ring 18 is arranged below the two fixing blocks 15, the annular sides of the two connecting rings 18 are fixedly connected with two connecting shafts 21 and two L-shaped blocks 20, two fixing rods 5 are fixedly connected in the test bench 1, the upper surfaces of the two fixing rods 5 are fixedly installed with motors 7, the two fixing rods 5 are rotatably connected with screws 8 and movably connected with connecting blocks 9, the upper surfaces of the two connecting blocks 9 are rotatably connected with connecting columns 12, and the upper surfaces of the two connecting columns 12 Both are fixedly connected with a fan 10, and the backs of the two pairs of connecting shafts 21 are rotatably connected with two connecting rods 22. The opposite sides of the two fixed rods 5 are provided with slots 6, and the two slots 6 are movably connected with the two connecting blocks 9 respectively, so as to provide suitable working pressure conditions for detecting the water hammer performance of solenoid valves of different specifications. The output voltage and output pulse width can be automatically adjusted to facilitate the detection of solenoid valves with different specifications and parameters. Different solenoid valves may require different driving voltages and pulse widths to control their opening and closing. This function ensures the versatility and adaptability of the device. It can be automatically detected according to the set program, and can also be switched to manual mode for manual switch detection. Automatic detection is suitable for batch testing and improves test efficiency. Manual detection is convenient for use in special circumstances or for detailed testing of specific solenoid valves.

[0029] The output shafts of the two motors 1 7 are fixedly connected to the two screw rods 8 respectively, and the upper surfaces of the two connecting blocks 9 are penetrated with threaded holes 11, which are respectively threadedly sleeved with the two screw rods 8, and the lower surfaces of the two connecting blocks 9 are fixedly installed with motors 2 13, and the output shafts of the two motors 2 13 are respectively fixedly connected to the two connecting columns 12. The water inlet pressure curve is automatically drawn, and the water hammer value and the maximum value are displayed. The user can intuitively see the pressure changes during the test and key data such as the water hammer peak value, which is convenient for real-time monitoring and analysis of the test results. Various test parameters can be easily set, and the user can flexibly adjust them according to the specific requirements of the solenoid valve being tested. The internal pressure sensor has an accuracy of 0.1% and a sampling frequency of 2200 times per second. It can accurately capture any changes in the water hammer value, ensure the accuracy and reliability of the measurement data, and meet the high-precision test requirements. The water hammer of the solenoid valve can be detected according to three standards on one device as a whole, which greatly saves costs and improves the use efficiency of the device and the comprehensiveness of detection.

[0030] Two springs 16 are fixedly connected to the lower surfaces of the two fixed blocks 15, and the two pairs of springs 16 are fixedly connected to the base 3. Two limit grooves 17 are provided on the inner walls of the two fixed blocks 15, and the two pairs of limit grooves 17 are respectively movably engaged with the two pairs of L-shaped blocks 20. Two dampers 19 are fixedly installed on the lower surfaces of the two connecting rings 18, and the two pairs of dampers 19 are fixedly connected to the base 3. When the liquid passes through the pores or gaps, it will encounter resistance. This resistance will hinder the flow of the liquid, convert the kinetic energy of the fluid into heat energy, and then absorb this part of the vibration energy, further improve the shock absorption effect, reduce the interference of vibration on the precision instruments inside the test bench 1 and the displacement and loosening of components, ensure the consistency of the test conditions, effectively improve the stability and repeatability of the test, make the test results of different batches comparable, and also prevent the vibration from causing damage to the moving parts such as the solenoid valve.

[0031] The opposite ends of the two groups of connecting rods 22 are rotatably connected with blocks 23, and the opposite surfaces of the two groups of blocks 23 and the two groups of connecting rods 22 are fixedly connected with connecting shafts 24. Springs 26 and telescopic rods 25 are fixedly connected between the two groups of connecting shafts 24. The two groups of springs 26 are movably connected to the two groups of telescopic rods 25 respectively. The fan 10 rotates in the direction and moves up and down to make the airflow evenly cover each ventilation hole. The high-speed airflow can blow away the dust, debris, etc. in the ventilation holes to keep the holes unobstructed. Compared with the traditional fixed heat dissipation method, the overall structure of the system can dynamically adjust the position and direction of the fan 10 according to the actual operation conditions and temperature distribution of the device, thereby improving the cooling efficiency and effect, reducing unnecessary energy waste, and effectively preventing the performance degradation, failure or even damage of the components due to overheating, thereby ensuring the stable operation of the device and the accuracy of the test data.

[0032] Working principle:

[0033] The first step is to open the distribution box door, main power supply and gas source on the test bench 1 in turn when the device is in use, then press the green "Power On" button on the left side of the touch screen 2 to turn on the power, and then click the "Inverter Off" button in the lower right corner of the screen to turn on the inverter power. The operation sequence must be strictly followed to ensure that all parts of the device are powered normally. According to the test requirements of the solenoid valve under test, enter relevant parameters in the parameter setting interface, such as valve opening time, valve closing time, number of switches, etc. Each parameter has a clear meaning, unit and input range. The user needs to understand the impact of these parameters on the test and set them reasonably according to the actual situation. For example, the recommended value of the valve opening time is 3s, but it can be Adjust within the range of 0.1-999.9s according to the characteristics of the specific solenoid valve, install the workpiece to be tested and connect the lines, enter the working pressure in the set pressure box, start the water pump and water hammer test function, switch to the automatic state and click the corresponding station test button to enter the automatic test. During the test, the water hammer value of each valve closure will be displayed and the maximum value will be retained, but the water hammer value of each valve closure must be manually recorded. Note that different types of solenoid valves (such as large flush valves, smart toilet valves, faucets and small flush valves) should be connected to the corresponding stations. The overall test is divided into manual test flow and automatic flow curve test. The test water pressure must be entered during the manual test and static test is selected. Or dynamic water pressure, open the water inlet valve of the corresponding station, manually open the solenoid valve to be tested when necessary, read the data after the flow is stable, and the automatic flow curve test is automatically tested by the system according to the set pressure range and draws the flow curve. During the test, it should be noted that if the water pump is manually turned off, the automatic test function must be manually turned off, otherwise the water pressure cannot be adjusted. Enter the manual operation page to open the water inlet valve of the corresponding station, set the water inlet pressure, turn on the water pump and the solenoid valve to be tested, and then close the solenoid valve, check and record the valve opening time and valve closing time of the corresponding station. In the automatic water hammer test state, you can also check the valve switching time by entering the status page. Turn off the water pump first, Then turn off the power of the inverter, and finally press the red "Power Off" button on the left side of the touch screen 2 to cut off the power, and close the front door of the distribution box, the main power switch and the main gas source. The shutdown steps must be performed in sequence to ensure that the device is safely shut down to avoid device damage or energy waste. The data display area of ​​the test interface can display water pump pressure, set pressure, system pressure, station pressure, static pressure, peak pressure, water hammer value, maximum peak, maximum water hammer and other data. Users can use these data to understand the pressure situation and water hammer related parameters during the test in real time. Test control buttons such as positive pulse, negative pulse, automatic / manual switching, test button (A test, B test, C test), reset button, etc. Users can use these buttons to control the switch of the solenoid valve, the switching of the test state and the start / stop of the test process, etc., to achieve flexible control of the test process, and can also automatically draw a flow curve during flow testing (in automatic flow curve test mode), intuitively displaying the trend of pressure or flow over time, which helps users analyze test results and system performance. The device is supplied with water by a water pump, and the speed and power of the water pump are controlled by the inverter, which can automatically adjust the water inlet pressure.It can adapt to different test pressure requirements and provide suitable working pressure conditions for detecting the water hammer performance of solenoid valves of different specifications. It can automatically adjust the output voltage and output pulse width to facilitate the detection of solenoid valves with different specifications and parameters. Different solenoid valves may require different drive voltages and pulse widths to control their opening and closing. This function ensures the versatility and adaptability of the device. It can be automatically detected according to the set program, and can also be switched to manual mode for manual switch detection. Automatic detection is suitable for batch testing and improves test efficiency. Manual detection is convenient for use in special circumstances or for detailed testing of specific solenoid valves. It automatically draws the water inlet pressure curve and displays the water hammer value and maximum value. Users can intuitively The pressure changes during the test and key data such as the water hammer peak value can be seen, which is convenient for real-time monitoring and analysis of test results. Various test parameters can be easily set, such as valve opening time, valve closing time, number of switches, voltage, pulse width, allowable error, stabilization time, etc. Users can flexibly adjust according to the specific requirements of the solenoid valve being tested. The internal pressure sensor has an accuracy of 0.1% and a sampling frequency of 2200 times per second. It can accurately capture any changes in the water hammer value, ensure the accuracy and reliability of the measurement data, and meet the needs of high-precision testing. The overall device can detect the water hammer of the solenoid valve according to three standards, which greatly saves costs and improves the use efficiency of the device and the comprehensiveness of the detection.

[0034] In the second step, when the test bench 1 is running, various components inside it will vibrate, and the vibration force generated will be transmitted to the fixed block 15 through the fixed plate 14. The two springs 16 fixed on the surface of the fixed block 15 will be compressed. At this time, the connecting ring 18 that is in contact with the surface of the fixed plate 14 will move downward under pressure. During the movement, the connecting ring 18 will evenly distribute the pressure to the two pairs of connecting rods 22. The springs 26 set on the connecting rods 22 will be compressed at the same time, and the telescopic rod 25 will also expand and contract after being subjected to pressure. When the two dampers 19 fixed on the lower surface of the connecting ring 18 are subjected to vibration pressure, their piston rods move in the cylinder, thereby driving the viscous liquid to pass through. When the liquid flows through the pores or gaps, it will encounter resistance. This resistance will hinder the flow of the liquid and convert the kinetic energy of the fluid into heat energy, thereby absorbing this part of the vibration energy, further improving the shock absorption effect, reducing the interference of vibration on the precision instruments inside the test bench 1 and the displacement and loosening of components, ensuring the consistency of the test conditions, effectively improving the stability and repeatability of the test, and making the test results of different batches comparable. In addition, it can also prevent vibration from causing damage to moving parts such as solenoid valves. Long-term vibration may cause problems such as wear of the solenoid valve core and seal failure. Buffering and vibration reduction can extend the service life of the solenoid valve and reduce the maintenance cost of the device.

[0035] The third step, during the operation of the device, by starting the motor 17, its output shaft begins to rotate, the output shaft of the motor 17 is connected to the screw 8, the screw 8 has a specific thread structure, the connection block 9 is provided with a threaded hole 11 matching the screw 8, and a spiral pair is formed between the two. The connection block 9 sleeved with the screw 8 can move up and down under the action of the thread, and a fan 10 is installed on the connection block 9. The motor 2 13 fixedly installed on the lower surface of the connection block 9 provides an independent power for the fan 10, so that it can rotate flexibly. The temperature sensors are distributed in the heating parts of the internal space of the test bench 1, the key positions of the pipeline system, etc. These temperature sensors monitor the temperature changes of the surrounding environment in real time, and convert the temperature signal into an electrical signal and transmit it to the control system. During the operation of the device, once the temperature of a component rises above the threshold, the control system immediately starts the fan 10 for cooling. Driven by the motor 2 13, the fan 10 The feedback information from the sensor is used to adjust the rotation direction. The rotation of the screw 8 drives the fan 10 to move to a position close to the component, and the cold air is accurately blown to the heating component. This precise cooling method can quickly take away the heat generated by the component, so that the component temperature can be rapidly reduced and maintained within a suitable working range. When the ventilation holes of the protective door 4 need to be cleaned, the fan 10 rotates in the direction and moves up and down to make the airflow evenly cover each ventilation hole. The high-speed airflow can blow away the dust, debris, etc. in the ventilation holes to keep the holes unobstructed. Compared with the traditional fixed heat dissipation method, the overall structure of the system can dynamically adjust the position and direction of the fan 10 according to the actual operation conditions and temperature distribution of the device, thereby improving the cooling efficiency and effect, reducing unnecessary energy waste, and effectively preventing the performance degradation, failure or even damage of the components due to overheating, thereby ensuring the stable operation of the device and the accuracy of the test data.

[0036] The examples of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and to design various embodiments with various modifications suitable for specific uses.

Claims

1. A comprehensive high-precision water hammer test device, comprising a test bench (1), wherein the test bench (1) comprises a touch screen (2) and two protective doors (4), characterized in that: The lower surface of the test bench (1) is fixedly connected to a fixing plate (14) by screws, the lower surface of the fixing plate (14) is movably connected to a base (3), the lower surface of the fixing plate (14) is fixedly connected to two fixing blocks (15), and a connecting ring (18) is provided below the two fixing blocks (15); The annular side surfaces of the two connecting rings (18) are fixedly connected to two connecting shafts (21) and two L-shaped blocks (20); the test bench (1) is fixedly connected to two fixing rods (5); the upper surfaces of the two fixing rods (5) are fixedly mounted with motors (7); the two fixing rods (5) are rotatably connected to screw rods (8) and movably connected to connecting blocks (9); the upper surfaces of the two connecting blocks (9) are rotatably connected to connecting columns (12); the upper surfaces of the two connecting columns (12) are fixedly connected to fans (10); the two pairs of connecting shafts (21) are rotatably connected to two connecting rods (22) on their opposite sides; the two fixing rods (5) are fixedly mounted with motors (7); the two fixing rods (5) are fixedly mounted with motors (7); the two fixing rods (5) are rotatably connected to screw rods (8) and movably connected to connecting blocks (9); the upper surfaces of the two connecting blocks (9) are rotatably connected to connecting columns (12); the upper surfaces of the two connecting columns (12) are fixedly connected to fans (10); the two pairs of connecting shafts (21) are rotatably connected to two connecting rods (22); the two fixing rods (5) are fixedly mounted with motors (7 ... Two springs (16) are fixedly connected to the lower surface of the blocks (15), and the two pairs of springs (16) are fixedly connected to the base (3). The inner walls of the two fixed blocks (15) are provided with two limit grooves (17), and the two pairs of limit grooves (17) are respectively movably engaged with the two pairs of L-shaped blocks (20). Two dampers (19) are fixedly installed on the lower surfaces of the two connecting rings (18), and the two pairs of dampers (19) are fixedly connected to the base (3). The opposite ends of the two groups of connecting rods (22) are rotatably connected to the clamping blocks (23), and the opposite surfaces of the two groups of clamping blocks (23) and the two groups of connecting rods (22) are fixedly connected to the connecting shafts (24).

2. A comprehensive high-precision water hammer test device as claimed in claim 1, characterized in that: The opposing surfaces of the two fixing rods (5) are each provided with a clamping groove (6); The two card slots (6) are movably connected to the two connection blocks (9) respectively.

3. A comprehensive high-precision water hammer test device as claimed in claim 1, characterized in that: The output shafts of the two motors (7) are respectively fixedly connected to the two screw rods (8), and threaded holes (11) are formed through the upper surfaces of the two connecting blocks (9); The two threaded holes (11) are respectively threadably connected to the two screw rods (8).

4. A comprehensive high-precision water hammer test device as claimed in claim 1, characterized in that: A second motor (13) is fixedly mounted on the lower surfaces of the two connecting blocks (9); The output shafts of the two motors 2 (13) are respectively fixedly connected to the two connecting columns (12).

5. A comprehensive high-precision water hammer test device as claimed in claim 1, characterized in that: A second spring (26) and a telescopic rod (25) are fixedly connected between the two groups of connecting shafts (24).

6. A comprehensive high-precision water hammer test device as claimed in claim 5, characterized in that: The two groups of springs (26) are respectively movably sleeved with the two groups of telescopic rods (25).

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