Hydraulic cylinder assembly test control system and method

Abstract

The present invention provides a hydraulic oil cylinder assembly test control system and method, belonging to the technical field of hydraulic oil cylinder assembly test control; the technical problem to be solved is: to provide an improvement of the structure of a hydraulic oil cylinder assembly test control system and the control method; the technical solution adopted to solve the technical problem is: the output end of an oil source control device is connected to a hydraulic control device through a hose, and the oil pipeline in the hydraulic control device is connected to a tested hydraulic cylinder through a quick connector; the test device includes a cabinet with an H-shaped cross section, the hydraulic control device is arranged inside the cabinet, the tested hydraulic cylinder is installed on the base of the cabinet through a support groove and a fixing belt, the bottom of the cabinet is provided with a magnetic scale that can be stretched outward, the bottom of the magnetic scale is provided with a support plate, and an anti-rotation linear slide rail is provided on the magnetic scale; the present invention is applied to the hydraulic oil cylinder assembly test.

Description

Technical Field

[0001] The invention provides a hydraulic oil cylinder assembly test control system and method, belonging to the technical field of hydraulic oil cylinder assembly test control. Background Art

[0002] Hydraulic cylinders are important components in the industrial field. Currently, most equipment used in industrial manufacturing is equipped with hydraulic cylinders of different models and functions. Because they are important supporting components, each cylinder product needs to be tested after assembly, and it is a key process. With the improvement of production efficiency and the acceleration of production pace, the cylinder assembly test occupies more personnel, equipment and other resources, which has become one of the factors restricting its normal circulation. Therefore, in order to ensure the quality of cylinder products, enhance testing capabilities and improve inspection efficiency, it has become the current goal of hydraulic cylinder testing.

[0003] Currently, the content of hydraulic cylinder testing is mainly controlled by the operator to control the hydraulic oil source, and the inspector to observe and record the product status and test results. The test process is generally divided into five steps, and the whole process takes nearly a day to complete. In addition, the experimental results require a lot of project data to be recorded, which makes the operator and inspector work continuously for a long time, which can easily cause fatigue and increase the risk of incorrect operation and recording. At the same time, the use of manual control of the hydraulic oil source will also cause the accuracy and repeatability of the test process parameters to be unstable, which is very likely to affect the accuracy of the test data. Summary of the Invention

[0004] In order to overcome the deficiencies in the prior art, the present invention aims to solve the following technical problems: providing an improvement in the control system structure and control method for a hydraulic cylinder assembly test.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a hydraulic cylinder assembly test control system, including an oil source control device for controlling and adjusting the test working conditions, a test device for controlling and measuring the cylinder extension displacement and speed, a hydraulic control device for controlling and adjusting the hydraulic pressure and flow, and a controller for sending control signals and collecting data;

[0006] The output end of the oil source control device is connected to the hydraulic control device through a hose, and the oil delivery pipe in the hydraulic control device is connected to the tested hydraulic cylinder through a quick connector;

[0007] The test device includes a cabinet with an H-shaped cross-section, the hydraulic control device is arranged inside the cabinet, the tested hydraulic cylinder is mounted on the base of the cabinet via a support groove and a fixing belt, the bottom of the cabinet is provided with a magnetic scale that can be stretched outward, the bottom of the magnetic scale is provided with a support plate, and an anti-rotation linear slide is provided on the magnetic scale;

[0008] A connecting bracket is vertically mounted on the extended end of the piston rod of the tested hydraulic cylinder, and an induction joint in contact with the anti-rotation linear slide rail is further provided at the bottom of the connecting bracket;

[0009] The oil delivery pipe of the hydraulic control device is also provided with a manual shut-off valve, a pressure gauge, a high-pressure filter, a flow meter, an electronically controlled flow valve, and a temperature sensor in sequence;

[0010] The oil pipeline on the side where the manual stop valve is provided is connected to the oil source control device;

[0011] The oil pipeline on the side where the temperature sensor is provided is connected to the quick connector through a high-pressure reversing valve, and a pressure sensor is also provided on the output end of the high-pressure reversing valve;

[0012] The controller is connected to the control end of the oil source control device through a wire, and the controller is also connected to the manual stop valve, pressure gauge, high-pressure filter, flow meter, electronically controlled flow valve, temperature sensor, high-pressure reversing valve, pressure sensor, and induction joint through wires.

[0013] The controller is also externally connected to a video monitoring unit, which includes a monitoring camera and a hard disk recorder.

[0014] The controller is also externally connected to a fault alarm unit.

[0015] The controller is also externally connected to a display screen, a keyboard, and a mouse.

[0016] The controller is also connected to the upper-level monitoring server via a switch.

[0017] The bottom of the supporting plate is also provided with a rolling pulley.

[0018] The bottom of the cabinet is also provided with an oil collecting trough and an oil collecting port for collecting oil.

[0019] The method for controlling the hydraulic cylinder assembly test control system includes the following hydraulic cylinder assembly test steps:

[0020] Step 1: Initialize the hydraulic cylinder assembly test control system, fix the tested hydraulic cylinder on the cabinet, and connect the extended end of the tested hydraulic cylinder piston rod to the induction connector on the magnetic scale through the connecting bracket;

[0021] Step 2: The controller sends an oil delivery instruction to the oil source control device, and the oil source control device pumps the hydraulic oil into the oil delivery pipe of the hydraulic control device;

[0022] First, open the manual shut-off valve and connect the pressure-resistant hose to the oil inlet and outlet of the tested hydraulic cylinder through the quick-connect connector. The controller controls the output oil pressure of the oil source control device and switches the oil inlet to the rod chamber or rodless chamber of the tested hydraulic cylinder by controlling the high-pressure reversing valve. The flow is adjusted by the electronically controlled flow valve to finally complete the pressure and flow adjustment and test of the tested hydraulic cylinder.

[0023] Step 3: Determine the displacement of the piston rod of the tested hydraulic cylinder by reading the running distance of the induction joint on the magnetic scale. The controller monitors the extension and retraction distance of the piston rod of the tested hydraulic cylinder.

[0024] Step 4: During the test, the pressure gauge and flow meter installed in the hydraulic control device collect the pressure and flow values ​​of the input hydraulic oil in real time and send them to the controller. The controller controls the oil source to adjust the pressure of the oil source and realize the change of the hydraulic oil pressure inside the tested hydraulic cylinder;

[0025] Step 5: Test the hydraulic cylinder under different oil pressure conditions, and send the test data obtained to the controller for storage.

[0026] The beneficial effects of the present invention compared to the prior art are as follows: the present invention can realize the automated operation of the cylinder assembly test by providing a hydraulic cylinder assembly test control scheme. The entire test process is process-controlled by a program preset by the controller, ensuring the accuracy of detection control and repetitive operations during the test. The test results are directly recorded by the system, and digital records can be generated according to process inspection requirements, which greatly reduces the test workload. The control system can immediately judge the validity of the test results and the quality of the product based on the digitally recorded data, and generate test conclusions, effectively improving the efficiency of the test and the quality of the cylinder product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 It is a structural diagram of the test control system of the present invention;

[0029] Figure 2 Schematic diagram of the structure of the hydraulic control device of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the test device of the present invention;

[0031] Figure 4 This is a diagram showing the effect of using the test device of the present invention;

[0032] Figure 5 It is a partial enlarged view of the test device of the present invention;

[0033] In the figure: 1 is a quick connector, 10 is a tested hydraulic cylinder, 20 is a cabinet, 21 is a support groove, 22 is a fixing belt, 23 is a magnetic scale, 24 is an anti-rotation linear guide rail, 25 is a connecting bracket, and 26 is an induction connector;

[0034] 2 is a manual stop valve, 3 is a pressure gauge, 4 is a high-pressure filter, 5 is a flow meter, 6 is an electronically controlled flow valve, 7 is a temperature sensor, 8 is a high-pressure reversing valve, and 9 is a pressure sensor. DETAILED DESCRIPTION

[0035] like Figures 1 to 5 As shown, the hydraulic cylinder assembly test control system provided by the present invention mainly includes a single-stage cylinder test tool, various types of sensor units, an acquisition control unit and a monitoring alarm unit. The installation connection relationship between the various components of the control system is: the operator connects the hydraulic oil source to the test tool through a quick connector, and connects it to the hydraulic cylinder to be tested through the pipeline set inside the test tool. At the same time, various sensors and controllers set on the test tool pipeline are connected to an independently set control and acquisition system (controller) through wires; based on the setting of the above system structure, the data is automatically collected and processed by the system, which can reduce the test workload and work intensity and improve the test quality.

[0036] Furthermore, the hydraulic cylinder assembly test control system provided by the present invention includes an oil source control device for controlling and adjusting the test working conditions, a test device for controlling and measuring the telescopic displacement and speed of the cylinder body, a hydraulic control device for controlling and adjusting the hydraulic pressure and flow, and a controller for sending control signals and collecting data;

[0037] The output end of the oil source control device is connected to the hydraulic control device through a hose, and the oil delivery pipe in the hydraulic control device is connected to the tested hydraulic cylinder 10 through a quick connector 1;

[0038] The test device includes a cabinet 20 with an H-shaped cross-section. The hydraulic control device is disposed inside the cabinet 20. The tested hydraulic cylinder 10 is mounted on the base of the cabinet 20 via a support groove 21 and a fixing belt 22. A magnetic scale 23 capable of stretching outward is disposed at the bottom of the cabinet 20. A support plate is disposed at the bottom of the magnetic scale 23, and an anti-rotation linear slide 24 is disposed on the magnetic scale 23.

[0039] A connecting bracket 25 is vertically mounted on the extended end of the piston rod of the tested hydraulic cylinder 10. The bottom of the connecting bracket 25 is also provided with an induction joint 26 in contact with the anti-rotation linear guide rail 24.

[0040] The oil delivery pipe of the hydraulic control device is also provided with a manual stop valve 2, a pressure gauge 3, a high-pressure filter 4, a flow meter 5, an electronically controlled flow valve 6, and a temperature sensor 7 in sequence;

[0041] The oil pipeline on the side where the manual stop valve 2 is provided is connected to the oil source control device;

[0042] The oil pipeline on the side where the temperature sensor 7 is provided is connected to the quick connector 1 through a high-pressure reversing valve 8. A pressure sensor 9 is also provided on the output end of the high-pressure reversing valve 8.

[0043] The controller is connected to the control end of the oil source control device through a wire, and the controller is also connected to the manual stop valve 2, the pressure gauge 3, the high-pressure filter 4, the flow meter 5, the electronically controlled flow valve 6, the temperature sensor 7, the high-pressure reversing valve 8, the pressure sensor 9, and the induction joint 26 through wires.

[0044] The test system provided by the present invention is centered on the test control and acquisition system (controller), and each subsystem coordinates the work to provide the test station with test media that meet the test requirements, and at the same time collect, store and process the test parameters; specifically, the source supply system provided by the present invention is mainly an oil source test bench with an automatic oil source control function. The oil source is mainly used to provide test media for the test products and to control and adjust the test conditions; the present invention is designed with corresponding transfer test tooling based on the single-stage cylinder test, which is convenient for operators to perform installation and test-related operations to meet corresponding test requirements. For the single-stage cylinder test, the test tooling can perform pressure regulation and flow regulation functions, and can measure the telescopic displacement and speed of the cylinder body during the test.

[0045] The present invention also provides a corresponding test control and data acquisition system, which can automatically control and adjust the test conditions, including pressure regulation, flow regulation, etc., and automatically collect, store and process test parameters, including pressure, flow and other parameters. At the same time, the system can be safety monitored, safety interlocked and sound and light alarmed, and has data communication function with the upper production control system (controller).

[0046] In addition, the present invention is also provided with a video monitoring unit for monitoring the automatic operation of the test site equipment, which can record and store the product test status and equipment operation status in real time through video.

[0047] Furthermore, the test tooling provided in the embodiment of the present invention is mainly composed of a hydraulic control device and a test (workstation) device, wherein the hydraulic control device is mainly used to provide the pressure and flow required for the test to the hydraulic cylinder product being tested, and to control the (oil source) pressure and flow changes, thereby realizing real-time detection of the (oil source) pressure, flow, temperature, and piston rod extension length of the hydraulic cylinder being tested, and by setting up a test device cabinet to carry the hydraulic cylinder product being tested and loading the hydraulic control device, the support, positioning, fixation and other functions of the hydraulic cylinder product being tested and related components are simultaneously completed.

[0048] The hydraulic control device provided by the present invention provides pressure and flow to the tested hydraulic cylinder product, controls and collects corresponding physical quantities. When conducting the test, the tested hydraulic cylinder product is connected to the hydraulic control device through a quick connector. The measurement and control system arranged inside the hydraulic control device controls various components to supply oil to the tested product, completes the established test process, records test pressure, flow and other data, and finally completes the test; the power of the hydraulic control device comes from a preset oil source control device. By controlling the oil source through the measurement and control system, the input oil source pressure can be adjusted, thereby controlling the change in the pressure of the tested hydraulic cylinder product.

[0049] During operation, first open the manual shut-off valve, connect the pressure-resistant hose to the oil inlet and outlet of the tested hydraulic cylinder product through the quick-connect connector, and use the measurement and control system to control the hydraulic oil source pressure, input hydraulic oil to the hydraulic control device, and switch the oil inlet to the rod chamber or rodless chamber of the tested hydraulic cylinder product by controlling the high-pressure reversing valve. The flow is adjusted by the electronically controlled flow valve to finally complete the pressure and flow regulation and test of the tested hydraulic cylinder product. In addition, a displacement sensor (sensing joint) is set to monitor the extension and retraction stroke of the piston rod of the tested hydraulic cylinder product. In addition, in order to achieve the test purpose, multiple functional components are also set on the oil pipeline of the hydraulic control device, including:

[0050] The manual shut-off valve is used to connect the oil source pressure and flow to the hydraulic system and is operated on site by staff;

[0051] The installed pressure gauge is used to complete on-site testing of the oil source pressure, so that the staff can fully understand the current pressure status of the oil source before conducting the test operation;

[0052] During the test, the oil from the source enters the hydraulic system through a high-pressure filter. The high-pressure filter filters the oil to prevent excess matter from entering the tested product, thereby avoiding potential safety hazards and malfunctions.

[0053] The throttle valve is used to manually adjust the flow of the hydraulic system so that the system flow is in an easily controllable range;

[0054] The flow meter is used to monitor the flow rate of the system loop and has the function of remotely transmitting the data to the measurement and control end, ensuring that the staff can remotely monitor the system flow and facilitate the measurement and control system to complete the closed-loop control of the flow based on the current flow value;

[0055] The electronically controlled flow valve is used to adjust the flow of the hydraulic system and control the flow of products entering the hydraulic cylinder;

[0056] The high-pressure reversing valve is used to switch the hydraulic system's inlet and return oil circuits, directly controlling the extension and retraction of the piston rod of the test hydraulic cylinder product;

[0057] The pressure sensor installed in the inlet and return oil circuits is used to monitor the pressure changes in the rod chamber and rodless chamber of the tested hydraulic cylinder product. The pressure sensor remotely transmits the collected information to the measurement and control end, ensuring that the staff can remotely monitor the inlet and return oil pressure of the test hydraulic cylinder product, facilitating the measurement and control system to complete closed-loop pressure control based on the current pressure value;

[0058] The temperature sensor installed at the rodless cavity of the test hydraulic cylinder product is used to monitor the current system oil temperature;

[0059] The quick-connect connector set up above is used to complete the quick connection between the hydraulic system and the hydraulic cylinder under test during the test process, which can reduce the disassembly and assembly time and improve the test efficiency; the quick-connect connector set up can quickly complete the connection between the test system and the hydraulic cylinder product under test, effectively improving the speed of replacing the test object, saving time, and improving the efficiency of operators in loading and unloading products, and adapting to the needs of batch testing of hydraulic cylinder products under test. In addition, the quick-connect connector uses standardized products and can be quickly replaced in the event of problems.

[0060] The above-mentioned entire hydraulic control device adopts a fully automatic control structure. By setting the corresponding electronic control components, pressure control, flow control, and oil inlet direction control of the rod chamber and rodless chamber of the tested hydraulic cylinder product can all be realized online at the remote control console, without the need for operators to go to the test station to operate; pressure collection, flow collection, and temperature collection can all be transmitted to the remote control console through the collection line, so that the operator can remotely monitor various physical parameters in real time; at the same time, the corresponding test workflow program can be compiled according to the actual test process, and a series of test operations can be completed by issuing test instructions remotely, which can realize remote one-button testing. Compared with manual testing, it has the characteristics of high automation, high safety, and high efficiency.

[0061] Furthermore, the test (workstation) device provided in the embodiment of the present invention is used to carry the hydraulic cylinder product (hydraulic cylinder body) to be tested and load (install) a complete set of hydraulic control devices. The main structure of the test (workstation) device is an H-shaped (vertical) cabinet. The entire cabinet is a hollow structure. The hydraulic cylinder body is installed on the base (workbench) of the cabinet through corresponding supporting components. The hydraulic control device is accommodated inside the cabinet. The cabinet is made of carbon steel, and the three sides that are not adjacent to the hydraulic cylinder support are designed with detachable cabinet doors, which can be disassembled.

[0062] The cabinet size provided in the embodiment is limited to 2000×300×1500mm (length×width×height). This size is matched with the entire hydraulic cylinder support to ensure that the width of the entire tooling does not exceed 1000mm. While meeting the function of loading the hydraulic system, the size of the cabinet is minimized as much as possible to reduce the space occupied.

[0063] The above-mentioned support components are used to support and fix the tested hydraulic cylinder products, and at the same time carry the corresponding auxiliary tooling. The support components include a V-shaped support groove (base) and a fixing belt. The support groove is the basic structure, used to bear the weight of all components and the tested hydraulic cylinder products, and is made of carbon steel; a corresponding fixing belt is also provided above the support groove, which can lock the hydraulic cylinder through the fixing belt to prevent the hydraulic cylinder from moving and circumferential motion.

[0064] In addition, since the test (workstation) device needs to move the tested hydraulic cylinder product up and down and disassemble and assemble the oil port on the platform during the test, oil may drip onto the platform. The platform is equipped with a corresponding oil collection port, which can collect the dripping oil into the oil collection tank in the cabinet through the oil collection port. The oil collection tank is set inside the cabinet base and is used to collect the hydraulic oil flowing out during the disassembly and assembly of the tested hydraulic cylinder product during the test, so as to prevent the oil from polluting the environment and can reuse the recovered oil.

[0065] In order to detect the displacement distance of the piston rod of the tested hydraulic cylinder, the present invention sets a magnetic scale for detection to realize the function of a displacement sensor. The magnetic scale is installed on a supporting pallet. A rolling pulley is provided at the bottom of the pallet. The scale can be stored inside the base of a cabinet when not in use and can be pulled out when needed. By storing the scale, the function can be met while the size can be controlled, thereby reducing the size of the tooling as much as possible. The tested hydraulic cylinder product is connected to the magnetic scale on the pallet through a connecting bracket. The displacement measurement principle is: the relative movement between the magnetic scale sensing connector and the displacement sensor (the scale on the magnetic scale) is used for measurement. Anti-rotation slide rail structures are arranged on both sides of the magnetic scale sensing connector to prevent the piston rod from rotating freely in the circumferential direction when the connecting bracket is extended to a certain length.

[0066] Furthermore, the controller provided in the embodiment of the present invention is provided with a corresponding acquisition control unit to achieve centralized control, which is used for test-related process control and product test data acquisition; wherein, the process control part controls the test process, monitors the test status, and has the function of stopping the test and alarming in an emergency; the data acquisition part records the test parameters and displays them in real time, and has the function of printing and processing data after the test.

[0067] The test (process) control and data acquisition components provided include measurement and control system controller, power supply unit, signal conditioning and conversion module, measurement and control host, sensors and cables. The control components are mainly responsible for system process control, interlocking logic and system status monitoring; the data acquisition components are mainly responsible for signal acquisition and data analysis and processing related to product testing.

[0068] Furthermore, the test control system provided by the present invention is divided into three control management layers, wherein:

[0069] The first layer consists of the on-site remote control equipment of the test system. The remote control valves, monitoring pressure sensors, flow sensors, etc. used on the system site are connected to the I / O channels of the measurement and control system through relays and isolators to realize the monitoring access function of this part of the equipment.

[0070] The second layer consists of the measurement and control system controller and the control acquisition module. It is the main control implementation area of ​​this test system. The process control system directly faces all the lower-level equipment connected, realizes the software and hardware association of the control system, and provides the logic control function of the entire test system as well as the signal acquisition and conditioning functions.

[0071] The third layer is the operation layer, which is mainly composed of measurement and control computers and related communication components. It is the main control and operation area of ​​this test system. By providing a human-machine interface and a data display and analysis interface, it displays the operating status of the system to the operator. At the same time, it responds to the operator's instructions and sends them to the lower-level equipment to realize the control of the process system and product testing, and the display and processing of test data.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic cylinder assembly test control system, characterized by: It includes an oil source control device for controlling and adjusting the test working conditions, a test device for controlling and measuring the cylinder extension displacement and speed, a hydraulic control device for controlling and adjusting the hydraulic pressure and flow, and a controller for sending control signals and collecting data; The output end of the oil source control device is connected to the hydraulic control device through a hose, and the oil delivery pipe in the hydraulic control device is connected to the tested hydraulic cylinder (10) through a quick connector (1); The test device comprises a cabinet (20) having an H-shaped cross section, the hydraulic control device being arranged inside the cabinet (20), the tested hydraulic cylinder (10) being mounted on a base of the cabinet (20) via a support groove (21) and a fixing belt (22), a magnetic scale (23) capable of being stretched outward being arranged at the bottom of the cabinet (20), a support plate being arranged at the bottom of the magnetic scale (23), and an anti-rotation linear slide rail (24) being arranged on the magnetic scale (23); A connecting bracket (25) is vertically mounted on the extended end of the piston rod of the tested hydraulic cylinder (10), and a sensing joint (26) in contact with the anti-rotation linear slide rail (24) is further provided at the bottom of the connecting bracket (25); A manual shut-off valve (2), a pressure gauge (3), a high-pressure filter (4), a flow meter (5), an electronically controlled flow valve (6), and a temperature sensor (7) are sequentially provided on the oil delivery pipe of the hydraulic control device. The oil delivery pipe on the side where the manual stop valve (2) is provided is connected to the oil source control device; The oil delivery pipe on the side where the temperature sensor (7) is provided is connected to the quick connector (1) via a high-pressure reversing valve (8), and a pressure sensor (9) is also provided on the output end of the high-pressure reversing valve (8); The controller is connected to the control end of the oil source control device via a wire, and the controller is also connected to the manual stop valve (2), the pressure gauge (3), the high-pressure filter (4), the flow meter (5), the electric control flow valve (6), the temperature sensor (7), the high-pressure reversing valve (8), the pressure sensor (9), and the induction joint (26) via wires.

2. A hydraulic cylinder assembly test control system according to claim 1, characterized in that: The controller is also externally connected to a video monitoring unit, which includes a monitoring camera and a hard disk recorder.

3. The hydraulic cylinder assembly test control system according to claim 1, characterized in that: The controller is also externally connected to a fault alarm unit.

4. The hydraulic cylinder assembly test control system according to claim 1, characterized in that: The controller is also externally connected to a display screen, a keyboard, and a mouse.

5. The hydraulic cylinder assembly test control system according to claim 1, characterized in that: The controller is also connected to the upper-level monitoring server via a switch.

6. The hydraulic cylinder assembly test control system according to claim 1, characterized in that: The bottom of the supporting plate is also provided with a rolling pulley.

7. The hydraulic cylinder assembly test control system according to claim 1, characterized in that: The bottom of the cabinet (20) is also provided with an oil collecting trough and an oil collecting port for collecting oil.

8. The control method using the hydraulic cylinder assembly test control system according to claim 1 is characterized in that: The hydraulic cylinder assembly test steps include the following: Step 1: Initialize the hydraulic cylinder assembly test control system, fix the tested hydraulic cylinder (10) on the cabinet (20), and connect the extended end of the piston rod of the tested hydraulic cylinder (10) to the induction connector (26) on the magnetic scale (23) through the connecting bracket; Step 2: The controller sends an oil delivery instruction to the oil source control device, and the oil source control device pumps the hydraulic oil into the oil delivery pipe of the hydraulic control device; First, open the manual stop valve (2), connect the pressure-resistant hose to the oil inlet and outlet of the tested hydraulic cylinder (10) through the quick connector (1), control the oil pressure output by the oil source control device through the controller, and switch the oil inlet to the rod chamber or the rodless chamber of the tested hydraulic cylinder (10) by controlling the high-pressure reversing valve (8), and adjust the flow rate through the electronically controlled flow valve (6), finally completing the pressure and flow regulation and test of the tested hydraulic cylinder (10); Step 3: Determine the displacement distance of the piston rod of the tested hydraulic cylinder (10) by reading the running distance of the induction joint (26) on the magnetic scale (23), and monitor the extension and retraction travel distance of the piston rod of the tested hydraulic cylinder (10) by the controller; Step 4: During the test, the pressure gauge (3) and flow meter (5) provided in the hydraulic control device collect the pressure value and flow value of the input hydraulic oil in real time and send them to the controller. The controller controls the oil source to adjust the pressure of the oil source, thereby changing the hydraulic oil pressure inside the tested hydraulic cylinder (10); Step 5: Under different oil pressure conditions, the tested hydraulic cylinder (10) is tested, and the test data obtained from the test is sent to the controller for storage.

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