Pressurization detection method and system

Abstract

According to the pressing detection method and system, performance detection of a hydraulic system product can be completed in a simple, convenient, efficient and accurate mode before a hydraulic station falls into a cabin, and then powerful support is provided for quality control and fault diagnosis. When the smoothness of the hydraulic pipeline in the hydraulic station is detected, hydraulic oil with set pressure is injected into the hydraulic pipeline of the hydraulic station, the reading change and the oil return condition of a hydraulic pressure gauge are observed, and whether the hydraulic pipeline is blocked or leaked or not is judged; when the opening and closing function of the hydraulic lock is detected, the opening and closing action of the hydraulic lock in the working process of the hydraulic pump station is simulated, and the opening and closing state of the hydraulic lock and the pressure change in the opening and closing process are monitored; when the working state of the electromagnetic valve is detected, a control signal is sent to the electromagnetic valve, and the response time, action accuracy and sealing performance of the electromagnetic valve are observed; when the pressure maintaining performance of the energy accumulator is detected, hydraulic oil with set pressure is filled into the energy accumulator, then the pressurizing valve is closed, and the pressure change condition of the energy accumulator within set time is observed.

Description

Technical Field

[0001] The invention relates to a detection method and system, in particular to a pressure detection method and system, and belongs to the technical field of hydraulic system detection. Background Art

[0002] In the daily maintenance and inspection of hydraulic systems, it is crucial to ensure that the pipelines are unobstructed, the hydraulic locks open and close normally, the solenoid valves work properly, the accumulators have good pressure-maintaining performance, and the DC electric suction pumps work stably. At the same time, detecting whether each bolt (hollow) joint is leaking or seeping is also the key to preventing hydraulic system failures. However, existing detection methods are often complicated to operate and inefficient, making it difficult to meet actual production needs. Summary of the invention

[0003] In view of this, the present invention proposes a pressure testing method, which can complete the performance testing of hydraulic system products in a simple, convenient, efficient and accurate manner before the hydraulic station is dropped, thereby providing strong support for quality control and fault diagnosis.

[0004] The technical solution of the present invention is: a pressure testing method, comprising: being used to perform performance testing on a hydraulic station, including testing the patency of a hydraulic pipeline in the hydraulic station, testing the opening and closing functions of a hydraulic lock, testing the working state of a solenoid valve, and testing the pressure-maintaining performance of an accumulator;

[0005] When testing the patency of the hydraulic pipeline in the hydraulic station, inject hydraulic oil of a set pressure into the hydraulic pipeline of the hydraulic station, observe the reading change of the hydraulic pressure gauge and the oil return condition, and judge whether there is blockage or leakage in the hydraulic pipeline;

[0006] When testing the opening and closing function of the hydraulic lock, simulate the opening and closing action of the hydraulic lock during the working process of the hydraulic pump station, monitor the opening and closing state of the hydraulic lock and the pressure changes during the opening and closing process;

[0007] When detecting the working state of the solenoid valve, a control signal is sent to the solenoid valve to observe the response time, action accuracy and sealing performance of the solenoid valve;

[0008] When testing the pressure-maintaining performance of the accumulator, the accumulator is charged with hydraulic oil of a set pressure, and then the charging valve is closed to observe the pressure change of the accumulator within a set time.

[0009] As a preferred embodiment of the present invention: it also includes testing the sealing performance of each hollow bolt joint in the hydraulic pump station: during the testing process, a set pressure is applied to the hollow bolt joint to be tested, and whether there is hydraulic oil seepage or leakage at the hollow bolt joint to determine the sealing performance of the hollow bolt joint.

[0010] In addition, the present invention provides a pressure detection system for implementing the above pressure detection method; the pressure detection system comprises: a display screen, a PLC controller, a hydraulic pressure gauge, a voltage-stabilized power supply, and a pipeline unit connected to the hydraulic station to be detected;

[0011] The display screen is used to display operating instructions, test results and real-time data;

[0012] The PLC controller, as the core control unit of the detection system, is responsible for receiving user instructions and controlling the coordinated work of various components;

[0013] The hydraulic pressure gauge is used to monitor the pressure changes inside the hydraulic station to be tested;

[0014] The voltage-stabilized power supply is used to provide a stable and reliable power supply for the entire detection system;

[0015] The pipeline unit is connected to the hydraulic pump station to be tested, and together they form a complete hydraulic circuit to ensure the realization of the testing function.

[0016] As a preferred embodiment of the present invention: in the pipeline unit between the detection system and the hydraulic station to be detected, a one-way liquid inlet valve and an adjustable liquid outlet valve are provided between the liquid inlet and each corresponding liquid outlet.

[0017] As a preferred embodiment of the present invention: the liquid outlet of the pressure detection system is provided with a quick connection and disconnection mechanism for connecting and disconnecting the hydraulic station to be detected with the detection system.

[0018] As a preferred embodiment of the present invention, the pressure detection system is connected to a remote monitoring unit, which can remotely monitor the operating status and test results of the detection equipment in real time and send out an alarm signal in time when an abnormality occurs.

[0019] As a preferred embodiment of the present invention, the pressure detection system is connected to a host computer for real-time recording and analyzing pressure data during the detection process.

[0020] Beneficial effects:

[0021] (1) The pressure detection method of the present invention can detect the pipeline patency of the hydraulic station, the opening and closing function of the hydraulic lock, the working state of the solenoid valve, the pressure holding performance of the accumulator, and whether each hollow bolt joint is leaking or seeping oil. The device is simple and convenient, the detection is comprehensive, the results are accurate, and the safety and reliability of the hydraulic system are greatly improved.

[0022] (2) The pressure detection system of the present invention can realize the automated testing process through preset programs, reduce manual intervention, and improve the consistency and repeatability of the test; it can also reduce the testing cost and time, and provide strong support for quality control and fault diagnosis.

[0023] (3) The pressure detection system of the present invention can accurately measure the internal pressure changes of the valve body during the pressure detection process, which helps to improve the accuracy and reliability of the detection results and reduce the risk of misjudgment.

[0024] (4) In the pressure testing system of the present invention, a one-way liquid inlet valve and an adjustable liquid outlet valve are provided between the liquid inlet and each corresponding liquid outlet in the pipeline unit between the testing system and the hydraulic station to be tested, which can improve the controllability and flexibility of the testing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a composition diagram of the suppression detection system of the present invention. DETAILED DESCRIPTION

[0026] In order to better understand the present invention, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Embodiment 1:

[0028] The present embodiment provides a pressure testing method, which is used to detect the patency of pipelines, the opening and closing functions of hydraulic locks, the working status of solenoid valves, the pressure maintaining performance of accumulators, the working status of DC electric oil suction pumps, and whether each bolt (hollow) joint is leaking or seeping oil before the hydraulic station is dropped into the cabin; the detection system has the advantages of being simple and convenient, comprehensive in detection, and accurate in results.

[0029] The hydraulic station to be tested includes key components such as hydraulic oil pump, oil distribution valve body, accumulator, several solenoid valves (in this case, four rising solenoid valves and four falling solenoid valves; respectively, left front rising valve, right front rising valve, left rear rising valve, right rear rising valve, left front falling valve, right front falling valve, left rear falling valve and right rear falling valve; "rising" and "falling" here correspond to the rising and falling of the vehicle body used by the hydraulic station; in addition, it also includes vehicle posture valve, unlocking valve and locking valve). Connect the pressure detection system with the hydraulic station to be tested to form a complete hydraulic circuit.

[0030] The pressure test system can simulate the pressure environment of the hydraulic pump station during actual operation, and test each key component of the hydraulic station to be tested one by one. The pressure test of the hydraulic station includes: testing the patency of the hydraulic pipeline in the hydraulic station, the opening and closing function of the hydraulic lock, the working status of the solenoid valve (including the rising solenoid valve and the descending solenoid valve), and the pressure maintaining performance of the accumulator.

[0031] When testing the patency of the pipeline, inject hydraulic oil of a set pressure into the hydraulic pipeline of the hydraulic station, and observe the changes in the readings of the hydraulic pressure gauge and the return oil situation to determine whether the hydraulic pipeline has blockage or leakage problems.

[0032] When testing the opening and closing function of the hydraulic lock, the opening and closing action of the hydraulic lock during the operation of the hydraulic pump station is simulated. By monitoring the opening and closing state of the hydraulic lock and the pressure changes during the opening and closing process, it is ensured that the hydraulic lock can complete the opening and closing action normally and accurately.

[0033] When detecting the working status of the solenoid valve, send a control signal to the solenoid valve to be detected, observe the response time, action accuracy and sealing performance of the solenoid valve, and ensure that the solenoid valve can complete the action quickly and accurately after receiving the control signal, and maintain good sealing in the closed state.

[0034] When testing the pressure-maintaining performance of the accumulator, hydraulic oil of a set pressure is charged into the accumulator, and then the charging valve is closed to observe the pressure change of the accumulator within the set time to evaluate whether the pressure-maintaining performance of the accumulator meets the design requirements.

[0035] Furthermore, the pressure detection device also has the function of detecting whether each bolt (hollow) joint in the hydraulic pump station is leaking or seeping oil; during the detection process, a set pressure is applied to the bolt joint to be detected, and it is observed whether there is hydraulic oil seepage or leakage at the bolt joint to determine whether the sealing performance of the joint is good.

[0036] In addition, the pressure detection system can also detect the working status of the DC electric oil suction pump (supply power to the DC electric oil suction pump to detect whether it can work normally), including the oil suction capacity, working efficiency and operating status of the motor of the oil suction pump, to ensure that the oil suction pump can work stably and efficiently.

[0037] Therefore, the pressure testing method can comprehensively and accurately detect the key performance indicators of the hydraulic pump station before it is put into operation, providing a strong guarantee for the installation and operation of the hydraulic pump station.

[0038] Embodiment 2:

[0039] like Figure 1 As shown, the pressure detection system capable of implementing the above pressure detection method includes: a display screen, a PLC controller, a hydraulic pressure gauge, a voltage-stabilizing power supply, and a pipeline unit connected to the hydraulic station to be detected.

[0040] The display screen is a touch screen, which is used to display operation instructions, test results and real-time data, providing users with an intuitive operation interface.

[0041] As the core control unit of the detection system, the PLC controller is responsible for receiving user instructions, controlling the coordinated work of various components, and realizing the automated detection process. The setting of the PLC controller enables the pressure detection system to realize the automated testing process through preset programs. The use of automated control reduces manual intervention and improves the consistency and repeatability of the test.

[0042] The hydraulic pressure gauge is used to monitor the pressure changes inside the hydraulic station to be tested (such as in the pipeline to be tested, accumulator, etc.) to ensure accurate pressure control during the testing process.

[0043] The voltage-stabilized power supply is used to provide a stable and reliable power supply for the entire detection system to ensure the normal operation of each component.

[0044] The pipeline unit is connected to the hydraulic pump station to be tested, and together they form a complete hydraulic circuit, thereby ensuring the realization of the testing function.

[0045] The hydraulic pressure gauge uses a high-precision hydraulic pressure gauge, which can accurately measure the internal pressure changes of the valve body during the pressure application process; this high-precision detection helps to improve the accuracy and reliability of the detection results and reduce the risk of misjudgment.

[0046] The pressure detection system can be connected to the host computer to record and analyze the pressure data during the detection process in real time, providing strong support for quality control and fault diagnosis.

[0047] As an example, in the piping unit between the detection system and the hydraulic station to be detected, a one-way inlet valve and an adjustable liquid outlet valve are provided between the liquid inlet and each corresponding liquid outlet. The one-way inlet valve ensures that the liquid can only flow in one direction, while the adjustable liquid outlet valve can adjust the liquid flow and pressure according to the test requirements; this design improves the controllability and flexibility of the test process.

[0048] Furthermore, the liquid outlet of the pressure detection system is provided with a quick connection and disconnection mechanism, which facilitates the quick connection and disconnection of the detection system with the hydraulic station to be detected, thereby improving the test efficiency.

[0049] As an example, the pressure detection system can use quick pipe joints to communicate and share tooling between different valve bodies of the hydraulic station to be tested.

[0050] As an example, the pressure detection system also includes a remote monitoring unit. The pressure detection system is connected to the remote monitoring unit. The remote monitoring unit can remotely monitor the operating status and test results of the detection equipment in real time, and promptly issue an alarm signal when an abnormality occurs, thereby ensuring the safety and reliability of the test process.

[0051] Through this pressure testing system, multiple performance indicators of the hydraulic station can be fully tested, including but not limited to:

[0052] (1) Oil supply distribution function: ensure that the hydraulic oil can be accurately delivered to each test point according to the preset distribution plan.

[0053] (2) The oil filling and discharging function enables the rapid filling and discharging of hydraulic oil, facilitating repeated testing.

[0054] (3) System pressure resistance: Within the set pressure range, test whether the hydraulic system can withstand and maintain a stable pressure state.

[0055] (4) Sealing performance: Use pressure retention test to check whether there is oil leakage or oil seepage at the oil pipe connection and valve body bolt connection.

[0056] like Figure 1 As shown, when in use, connect the display screen to the PLC controller, and connect the pipeline unit to the hydraulic pump station to be tested; then connect the 24V power supply and voltage regulator power supply of the hydraulic oil pump to start the display screen and PLC controller. According to the prompts on the display screen, touch the corresponding rising or falling symbol to start the oil pump and transport the oil in the oil tank to the oil distribution valve body through the pipeline.

[0057] When the pressure in the accumulator reaches the preset value, the hydraulic oil pump automatically stops working. At this time, you can open the rising solenoid valve or the falling solenoid valve to allow the hydraulic oil to flow back to the tank through the corresponding pipeline to detect the patency of the pipeline.

[0058] In order to further test the sealing performance of the oil pipe connection and the valve body bolt connection, install a hydraulic pressure gauge at the oil outlet of the return oil pipe. Press the pressure to 0.5MPa and maintain it for 10 minutes, and observe whether there is oil leakage or oil seepage at the oil pipe connection and the valve body bolt connection.

[0059] Embodiment 3:

[0060] Based on the above embodiment 2, the specific steps of using the above detection system to detect the hydraulic pump station are as follows:

[0061] S1: System initialization and power on

[0062] 101: Connect the 24V power supply and voltage regulator of the hydraulic oil pump, and ensure that the power supply is firmly connected and not loose; start the display screen and PLC controller to work.

[0063] 102: Turn on the power switches of the display screen and PLC controller, wait for the system self-check to complete and enter the standby state.

[0064] S2: Rising function detection

[0065] 201: When the rising symbol appears on the display, touch the rising symbol to select the rising function;

[0066] 202: Under the instruction of the PLC controller, close the rising solenoid valve to ensure that the rising solenoid valve is tightly closed;

[0067] 203: Start the hydraulic oil pump and observe the working status of the oil pump to ensure that the oil pump runs smoothly without abnormal noise;

[0068] 204: Use a hydraulic hose to connect the left front charging and discharging hydraulic lock quick-connect ends with the right front charging and discharging hydraulic lock quick-connect ends, ensuring that the connection is firm and leak-free;

[0069] 205: Open the hydraulic oil pump tank cap, observe the oil return, and record the oil return speed, color and other parameters;

[0070] 206: When the accumulator pressure reaches the preset value, the oil pump automatically stops working. At this time, you should confirm that the accumulator pressure indicator shows correct display.

[0071] S3: Rising valve oil return detection

[0072] 301: Under the instruction of the PLC controller, the rising solenoid valve is opened to allow the oil to flow back to the oil tank through the rising valve oil pipe;

[0073] 302: Observe the oil return pipeline to confirm that the oil return is smooth and there is no blockage;

[0074] S4: Front oil filling and discharging integrated valve and hydraulic lock function test

[0075] 401: Open the "vehicle posture valve", "left front rising valve" and "right front descending valve" of the hydraulic pump station to be tested in sequence to ensure that the opening sequence of each solenoid valve is correct;

[0076] 402: Start the hydraulic oil pump again, observe the oil return from the oil return line in the oil tank, and confirm that the front filling and draining integrated valve and the left front filling and right front draining functions of the hydraulic lock are normal;

[0077] 403: Close the above solenoid valve, stop the hydraulic oil pump, and record the test results.

[0078] S5: Function test of left front descending valve and right front ascending valve

[0079] 501: Close all solenoid valves and stop the hydraulic oil pump;

[0080] 502: Open the "vehicle posture valve", "left front descending valve" and "right front ascending valve" of the hydraulic pump station to be tested in sequence to ensure that the opening sequence of each solenoid valve is correct;

[0081] 503: Start the hydraulic oil pump, observe the oil return from the oil return line in the oil tank, and confirm that the front oil filling and draining integrated valve and the left front oil draining and right front oil filling functions of the hydraulic lock are normal;

[0082] 504: Close the above solenoid valve, stop the hydraulic oil pump, and record the test results.

[0083] S6: Pressure resistance test of the hydraulic pump station to be tested

[0084] 601: Install a hydraulic pressure gauge at the oil outlet of the return pipe to ensure that the pressure gauge is firmly connected and leak-free;

[0085] 602: Open the "vehicle posture valve", "left front lifting valve", "right front lifting valve", "left rear lifting valve", "right rear lifting valve", "wheel lifting valve" and "locking valve" of the hydraulic pump station to be tested in sequence to ensure that the opening sequence of each solenoid valve is correct;

[0086] 603: Start the hydraulic oil pump and observe the pressure gauge display. When the pressure reaches 0.5MPa, turn off the hydraulic oil pump.

[0087] 604: Maintain system pressure for 10 minutes, during which time observe whether there is oil leakage or oil seepage at the oil pipe connection and valve body bolt connection.

[0088] 605: Record the test results. If there is oil leakage or seepage, find the cause and repair it immediately.

[0089] S7: End of pressure holding and pressure relief operation

[0090] 701: After the pressure maintenance is completed, open the "vehicle posture valve", "left front descent valve", "right front descent valve", "left rear descent valve", "right rear descent valve", "wheel lift valve" and "unlock valve" in sequence to ensure that the opening order of each solenoid valve is correct.

[0091] 702: Start the hydraulic oil pump and keep it on for 3 seconds to gradually release the pressure in the system.

[0092] 703: Close all solenoid valves and hydraulic oil pumps and make sure that the system pressure has been completely released.

[0093] 704: Record the test results and confirm that all parts of the hydraulic system function normally and there is no oil leakage or seepage.

[0094] Through the above steps, the hydraulic pump station's pipeline patency, hydraulic lock opening and closing function, solenoid valve working status, accumulator pressure holding performance, and whether each hollow bolt joint is leaking or seeping can be fully tested. The detection system is simple and convenient, comprehensive, and accurate, greatly improving the safety and reliability of the hydraulic system.

[0095] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A pressure detection method, characterized in that: Used to perform performance testing on hydraulic stations, including testing the patency of hydraulic pipelines in hydraulic stations, testing the opening and closing functions of hydraulic locks, testing the working status of solenoid valves, and testing the pressure-maintaining performance of accumulators; When testing the patency of the hydraulic pipeline in the hydraulic station, inject hydraulic oil of a set pressure into the hydraulic pipeline of the hydraulic station, observe the reading change of the hydraulic pressure gauge and the oil return condition, and judge whether there is blockage or leakage in the hydraulic pipeline; When testing the opening and closing function of the hydraulic lock, simulate the opening and closing action of the hydraulic lock during the operation of the hydraulic pump station, monitor the opening and closing state of the hydraulic lock and the pressure changes during the opening and closing process; When detecting the working state of the solenoid valve, a control signal is sent to the solenoid valve to observe the response time, action accuracy and sealing performance of the solenoid valve; When testing the pressure-maintaining performance of the accumulator, the accumulator is charged with hydraulic oil of a set pressure, and then the charging valve is closed to observe the pressure change of the accumulator within a set time.

2. The pressure detection method according to claim 1, characterized in that: It also includes the detection of the sealing performance of each hollow bolt joint in the hydraulic pump station: during the detection process, a set pressure is applied to the hollow bolt joint to be detected, and whether there is hydraulic oil seepage or leakage at the hollow bolt joint to determine the sealing performance of the hollow bolt joint.

3. A suppression detection system, characterized in that: Used to implement the pressure detection method described in claim 1 or 2 above; the pressure detection system includes: a display screen, a PLC controller, a hydraulic pressure gauge, a voltage-stabilized power supply, and a pipeline unit connected to the hydraulic station to be detected; The display screen is used to display operating instructions, test results and real-time data; The PLC controller serves as the core control unit of the detection system, and is used to receive user instructions and control the coordinated work of various components; The hydraulic pressure gauge is used to monitor the pressure changes inside the hydraulic station to be tested; The voltage-stabilized power supply is used to provide a stable and reliable power supply for the entire detection system; The pipeline unit is connected to the hydraulic pump station to be tested, and together they form a complete hydraulic circuit to ensure the realization of the testing function.

4. The pressure detection system according to claim 3, characterized in that: In the pipeline unit between the detection system and the hydraulic station to be detected, a one-way liquid inlet valve and an adjustable liquid outlet valve are provided between the liquid inlet and each corresponding liquid outlet.

5. The suppression detection system according to claim 3, characterized in that: The liquid outlet of the pressure detection system is provided with a quick connection and disconnection mechanism for connecting and disconnecting the hydraulic station to be detected with the detection system.

6. The pressure detection system according to any one of claims 3 to 5, characterized in that: The pressure detection system is connected to a remote monitoring unit, which can remotely monitor the operating status and test results of the detection equipment in real time and send out an alarm signal in time when an abnormality occurs.

7. The suppression detection system according to claim 3, characterized in that: The pressure detection system is connected to a host computer and is used to record and analyze pressure data during the detection process in real time.

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