Hydraulic cylinder maintenance integrated platform and hydraulic cylinder sealing performance automatic test system

Abstract

The invention relates to a hydraulic cylinder maintenance integrated platform and a hydraulic cylinder sealing performance automatic test system. The hydraulic cylinder maintenance integrated platform comprises a test bed, a hydraulic cylinder support, two liftable hydraulic piston rod lifting support rollers, a piston rod butt joint nut, a telescopic push-pull rod and a telescopic push-pull rod lifting platform. The hydraulic cylinder support is connected and fixed to the top of the test bed through a sliding block and a sliding rail. And the two liftable hydraulic piston rod lifting support rolling shafts are connected and fixed at the top of the test bed through sliding blocks and sliding rails. And the telescopic push-pull rod is connected between the piston rod butt-joint nut and the telescopic push-pull rod lifting platform. And the two liftable hydraulic piston rod lifting support rolling shafts are arranged between the hydraulic cylinder bracket and the telescopic rod push-pull rod lifting table in parallel, and the distance is adjustable. The hydraulic cylinder support is arranged to support the hydraulic cylinder, the two hydraulic piston rod lifting supporting rolling shafts can be lifted, and the distance can be adjusted, so that the problem that an existing hydraulic cylinder cannot be pulled out and reassembled in the disassembly overhaul process is solved.

Description

Technical Field

[0001] This application belongs to the field of hydraulic equipment testing and maintenance technology, specifically relating to an integrated hydraulic cylinder repair platform and an automated hydraulic cylinder sealing performance testing system. Background Technology

[0002] Hydraulic butterfly valves are widely used in power plants for controlling the secondary cold source at the outlet of circulating water pumps due to their advantages such as short switching time and rapid response. To ensure the reliability of the actuator's valve control and in conjunction with equipment reliability management, power plants typically implement preventative maintenance programs. However, when disassembling and overhauling hydraulic actuators to replace sealing elements, the traditional method of disassembling and assembling pneumatic actuators for maintenance has the following drawbacks: Due to the high design pressure, large size, heavy weight, and stringent sealing requirements between the piston and the cylinder, the hydraulic cylinder's hydraulic cylinder is designed for high pressure. 1. The hydraulic cylinder is too large and its overall circular shape makes it difficult to fix effectively, which poses a huge challenge and potential hazard to the quality and safety of on-site maintenance work. 2. The friction between the piston and the cylinder body of the hydraulic cylinder is too large, and the piston cannot be removed by the traditional pulling method; 4. When the piston is reinstalled, the alignment between the piston and the inner wall of the hydraulic cylinder cannot be guaranteed. During the assembly process, the tilt between the piston and the hydraulic cylinder may cause damage or breakage of the sealing components on the piston, thereby affecting the realization of the expected function of the hydraulic actuator. 5. During piston reinstallation, the friction between the piston and the inner wall of the hydraulic cylinder makes it impossible to reinstall the piston into the cylinder body using the traditional pushing method.

[0003] Furthermore, as a key component of the nuclear power plant's cold source control system, the lack of an effective method for its maintenance will prolong its failure time. Prolonged maintenance will also impact the unit's power generation efficiency, resulting in significant economic losses. To address these issues, reduce the labor intensity of dismantling and shorten maintenance time, improve maintenance quality, verify the reliability of the maintained equipment, and avoid additional personnel injuries and equipment damage caused by dismantling and maintenance projects, a specialized dismantling tool needs to be invented. Summary of the Invention

[0004] In view of this, this application provides an integrated hydraulic cylinder maintenance platform and an automated hydraulic cylinder sealing test system to solve the problem that existing hydraulic cylinders cannot be extracted and reassembled during disassembly and overhaul.

[0005] The first aspect of this application provides an integrated hydraulic cylinder maintenance platform, which includes a test bench, a hydraulic cylinder support mounted on the upper surface of the test bench, two liftable hydraulic piston rod lifting support rollers, a piston rod connecting nut, a telescopic push-pull rod, and a telescopic push-pull rod lifting platform. The hydraulic cylinder support is fixed to the top of the test bench via a slider and slide rail, and is used to support the hydraulic cylinder. A sloping oil receiving groove is designed below the hydraulic cylinder support to collect oil dripping during disassembly and reassembly of the hydraulic cylinder. An oil drain port is designed at the bottom of the oil receiving groove. The two liftable hydraulic piston rod lifting support rollers are fixed to the top of the test bench via a slider and slide rail. The telescopic push-pull rod connects the piston rod connecting nut and the telescopic push-pull rod lifting platform. The two liftable hydraulic piston rod lifting support rollers are arranged parallel between the hydraulic cylinder support and the telescopic push-pull rod lifting platform, and the distance between the two liftable hydraulic piston rod lifting support rollers is adjustable.

[0006] In one specific implementation of this application, the rollers of the hydraulic piston rod lifting support roller adopt a V-shaped structure design; and / or, the hydraulic cylinder bracket adopts a V-shaped design.

[0007] In one specific implementation of this application, the integrated hydraulic cylinder maintenance platform also includes adjustable feet. The adjustable feet are located below the test bench and are used for moving and fixing the test bench.

[0008] In one specific implementation of this application, a stainless steel ruler is designed on one side of the slide rail.

[0009] In one specific implementation of this application, a loading cylinder is designed and installed at the bottom of the telescopic push-pull rod lifting platform.

[0010] The second aspect of this application provides an automated hydraulic cylinder sealing performance testing system, which includes a hydraulic assembly system and an integrated hydraulic cylinder maintenance platform as described in the first aspect of this application. The hydraulic assembly system is used to perform relevant sealing performance tests after the hydraulic cylinder has been disassembled and inspected on a test bench. The hydraulic assembly system includes a hydraulic generator, a parameter acquisition section, a control device, and an electrical control system. The parameter acquisition section mainly includes temperature and pressure acquisition elements. The control device controls the hydraulic generator based on the parameters acquired by the parameter acquisition section. The electrical control system is responsible for signal transmission, power distribution, and execution, and is used to connect the hydraulic generator, the parameter acquisition section, and the control device in series.

[0011] The beneficial effects of this technical solution are as follows: By setting up a hydraulic cylinder support bracket to support the hydraulic cylinder, the rolling of the hydraulic cylinder during maintenance is prevented, thus improving safety and reliability during maintenance. Adjusting the distance between the lifting support rollers of the two liftable hydraulic piston rods can meet the support needs of piston rods of different lengths; adjusting the height of the piston rod connecting nut and the telescopic push-pull rod on the lifting platform via the crank handle aligns them with the hydraulic cylinder axis, making it suitable for hydraulic cylinders of different diameters. Furthermore, all pressure-bearing parts of this integrated hydraulic cylinder maintenance platform have no welded connections, facilitating disassembly, ensuring a high safety factor, long service life, and easy maintenance. This integrated hydraulic cylinder maintenance platform effectively reduces the labor intensity of workers, reduces the number of personnel required, and improves work efficiency. Attached Figure Description

[0012] Figure 1 The image shown is a schematic diagram of the control cabinet in an automated hydraulic cylinder sealing performance testing system according to an embodiment of this application.

[0013] Figure 2 The image shown is a schematic diagram of the test bench in an integrated hydraulic cylinder maintenance platform provided in an embodiment of this application.

[0014] Figure 3 The diagram shown is an annotation of the test bench components in an integrated hydraulic cylinder maintenance platform provided in an embodiment of this application.

[0015] Figure 4 The image shown is a side view of a test bench provided in an embodiment of this application.

[0016] Figure 5 As shown Figure 4 The front view of the test bench shown.

[0017] Figure 6 The diagram shown is a hydraulic schematic of an automated hydraulic cylinder sealing performance testing system according to an embodiment of this application.

[0018] Figure 7 The diagram shown is a schematic diagram of the signal control system in an automated hydraulic cylinder sealing performance testing system according to an embodiment of this application.

[0019] Figure 8 The diagram shown is an operation flowchart of an automated testing system for the sealing performance of a hydraulic cylinder provided in an embodiment of this application.

[0020] Figure 9 The diagram shown is a top view of a hydraulic cylinder, an object to be repaired, according to an embodiment of this application.

[0021] Figure 10 The diagram shown is a cross-sectional view of a hydraulic cylinder, an object to be repaired, according to an embodiment of this application.

[0022] In the diagram, 1-High pressure gauge, 2-Sensor, 3-High pressure filter, 4-Pneumatic ball valve, 4a-First pneumatic ball valve, 4b-Second pneumatic ball valve, 4c-Third pneumatic ball valve, 4d-Fourth pneumatic ball valve, 5-Hydraulic solenoid directional valve, 6-Pneumatic-hydraulic booster pump, 7-Two-position five-way solenoid valve, 8-Two-position three-way solenoid valve, 9-Electrical proportional valve, 10-Pressure regulating valve, 11-Pressure gauge, 12-Electric injection pump, 13-Accumulator, 14-Pressure pipeline Filter, 15-Hydraulic proportional relief valve, 16-Check valve, 17-Motor pump auxiliary, 18-Air cooler, 19-Hydraulic oil tank, 20-Temperature transmitter, 21-Test bench, 22-Slide rail, 23-Oil receiving tank, 24-Oil receiving tank drain port, 25-Hydraulic cylinder bracket, 26-Hydraulic piston rod lifting support roller, 27-Piston rod mating nut, 28-Telescopic push-pull rod, 29-Telescopic push-pull rod lifting platform, 30-Adjustable feet, 31-Loading cylinder. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] At least one embodiment of this application provides an integrated platform for hydraulic cylinder maintenance, see reference. Figures 2 to 5 The integrated hydraulic cylinder maintenance platform includes a test bench 21, a hydraulic cylinder support 25 mounted on the upper surface of the test bench 21, two liftable hydraulic piston rod lifting support rollers 26, a piston rod connecting nut 27, a telescopic push-pull rod 28, and a telescopic push-pull rod lifting platform 29. The hydraulic cylinder support 25 is fixed to the top of the test bench 21 via a slider and slide rail 22, and is used to support the hydraulic cylinder. A sloping oil receiving groove 23 is designed below the hydraulic cylinder support 25 to catch oil dripping during disassembly and reassembly of the hydraulic cylinder. An oil drain port 24 is designed at the bottom of the oil receiving groove 23. The two liftable hydraulic piston rod lifting support rollers 26 are fixed to the top of the test bench 21 via a slider and slide rail 22. The telescopic push-pull rod 28 connects the piston rod connecting nut 27 and the telescopic push-pull rod lifting platform 29. Two liftable hydraulic piston rod lifting support rollers 26 are arranged in parallel between the hydraulic cylinder bracket 25 and the telescopic rod push-pull rod lifting platform 29, and the distance between the two liftable hydraulic piston rod lifting support rollers 26 is adjustable.

[0025] It should be noted that when there is too much oil, it should be drained through the oil drain port 24 of the oil receiving tank. The test bench 21 is used to hold the hydraulic cylinder to be disassembled. The appearance of the test bench 21 can be as follows... Figure 2 As shown.

[0026] For example, the two adjustable hydraulic piston rod lifting support rollers 26 are equipped with handwheels on their sides. Thus, the height of the top hydraulic piston rod lifting support rollers 26 can be adjusted by operating the side handwheels to accommodate pistons of different cylinder diameters during maintenance.

[0027] According to the technical solution provided in this application embodiment, by setting up a hydraulic cylinder bracket 25 to support the hydraulic cylinder, the rolling of the hydraulic cylinder during maintenance is prevented, thus improving the safety and reliability of the maintenance process. Adjusting the distance between the lifting support rollers 26 of the two liftable hydraulic piston rods can meet the support needs of piston rods of different lengths. Adjusting the height of the piston rod connecting nut 27 and the telescopic push-pull rod 28 on the lifting platform 29 using the crank handle ensures they are aligned with the hydraulic cylinder axis, accommodating hydraulic cylinders of different diameters. Furthermore, all pressure-bearing parts of this integrated hydraulic cylinder maintenance platform have no welded connections, facilitating disassembly, ensuring a high safety factor, long service life, and easy maintenance. This integrated hydraulic cylinder maintenance platform effectively reduces the labor intensity of workers, reduces the number of personnel required, and improves work efficiency.

[0028] In at least one embodiment of this application, the rollers of the hydraulic piston rod lifting support roller 26 adopt a V-shaped structure design. This allows for the use of piston rods with different diameters.

[0029] In at least one embodiment of this application, the hydraulic cylinder bracket 25 adopts a V-shaped design. This allows for the application of hydraulic cylinders with different diameters.

[0030] It should be noted that the contact surface between the hydraulic cylinder and the oil cylinder can be covered with fire-resistant and wear-resistant polytetrafluoroethylene (PTFE) sheets, which can effectively protect the paint on the surface of the oil cylinder from damage.

[0031] In at least one embodiment of this application, the test bench 21 is made of high-strength structural steel Q235 and is integrally welded. All welded parts employ a split-weld method, and stress is relieved after welding. Thus, by using split-weld methods for all welded parts, root penetration can be guaranteed. Furthermore, stress relief after welding can prevent deformation and performance loss due to stress release.

[0032] In at least one embodiment of this application, the integrated hydraulic cylinder maintenance platform further includes adjustable feet 30. The adjustable feet 30 are disposed below the test bench 21 and are used for moving and fixing the test bench 21.

[0033] In at least one embodiment of this application, a stainless steel scale is designed on one side of the slide rail 22. This allows for precise adjustment of the distance between the two hydraulic cylinder supports 25 using the scale's graduations, accommodating hydraulic cylinders of different lengths and facilitating better fixation of the hydraulic cylinders for easier subsequent piston assembly and disassembly.

[0034] In at least one embodiment of this application, a loading cylinder 31 is designed and installed at the bottom of the telescopic push-pull rod lifting platform 29. Thus, the loading cylinder 31 can be used to adjust the distance between the telescopic push-pull rod lifting platform 29 and the piston rod, assist in manually removing / reinstalling the piston rod, drain the oil inside the hydraulic cylinder before and after disassembly and assembly, and can also be used as a loading cylinder to test the performance of the hydraulic cylinder.

[0035] Careful investigation revealed that disassembling and reassembling the hydraulic cylinder made it impossible to simulate the sealing test under working pressure, thus failing to verify whether the condition of the repaired equipment met the design requirements and the reliability of the equipment repair could not be guaranteed.

[0036] Based on this, at least one embodiment of this application also provides an automated hydraulic cylinder sealing performance testing system, which includes the integrated hydraulic cylinder maintenance platform and hydraulic assembly system described in the above embodiments. The hydraulic assembly system is used to perform relevant sealing performance tests after the hydraulic cylinder has been disassembled and inspected on the test bench 21. The hydraulic assembly system includes a hydraulic generator, a parameter acquisition section, and a control device. The parameter acquisition section mainly includes temperature acquisition elements and pressure acquisition elements. The control device is used to control the hydraulic generator based on the parameters acquired by the parameter acquisition section. The electrical control system is the part for signal transmission, power distribution, and execution, used to connect the hydraulic generator, parameter acquisition section, and control device in series.

[0037] The appearance of the control cabinet in the control device can be as follows Figure 1 .

[0038] In some embodiments, the hydraulic assembly system is equipped with multiple alarm and safety protection devices in the hydraulic generator and electrical control system to comprehensively protect the safety of equipment and personnel, such as overpressure protection, leakage protection, and low liquid level protection.

[0039] In the above embodiments, the automated hydraulic cylinder sealing test system integrates hydraulic cylinder disassembly and assembly, sealing detection, automated testing and data management functions. It has multi-model compatibility, high-precision pressure control, media cleanliness assurance and intelligent data analysis functions, and is suitable for efficient maintenance and performance verification of multiple hydraulic cylinder models.

[0040] In at least one embodiment of this application, reference is made to Figure 6The hydraulic generating unit includes an oil system exchange section and a pneumatic booster section. The main components of the oil system exchange section are a high-pressure gauge 1, a sensor 2, a high-pressure filter 3, a pneumatic ball valve 4, a hydraulic solenoid directional valve 5, an accumulator 13, a pressure line filter 14, a hydraulic proportional relief valve 15, a check valve 16, an electric pump auxiliary 17, an air cooler 18, a hydraulic oil tank 19, and a temperature transmitter 20. The pneumatic ball valve 4 includes a first pneumatic ball valve 4a, a second air-hole ball valve 4b, a third air-hole ball valve 4c, and a fourth pneumatic ball valve 4d. The main components of the pneumatic booster section are a pneumatic-hydraulic booster pump 6, a two-position five-way solenoid valve 7, a two-position three-way solenoid valve 8, an electric proportional valve 9, a pressure regulating valve 10, and an electric injection pump 12. Temperature transmitter 20 is connected to the outer wall of hydraulic oil tank 19, and the probe monitors the oil temperature. Compressed air from the air source enters the chamber at one end of the piston of pneumatic-hydraulic booster pump 6 through two-position five-way solenoid valve 7, pressure regulating valve 10, electric proportional valve 9, and two-position three-way solenoid valve 8. At the same time, electric injection pump 12 delivers oil from hydraulic oil tank 19 to the other end of the piston of pneumatic booster pump 6. By increasing the gas pressure, the piston is pushed, thereby increasing the oil pressure. Oil with a certain pressure enters chamber A / B respectively through first pneumatic ball valve 4a and fourth pneumatic ball valve 4d, high-pressure filter 3, sensor 2, and high-pressure gauge 1. Oil enters the oil tank through high-pressure gauge 1, sensor 2, high-pressure filter 3, second air-hole ball valve 4b, third air-hole ball valve 4c, and hydraulic solenoid directional valve 5, and then through air cooler 18, or through high-pressure gauge 1, sensor 2, pressure pipeline filter 14, hydraulic proportional relief valve 15, and air cooler 18.

[0041] The electrical control system transmits signals to the electrical components in the hydraulic generator, including sensor 2, hydraulic solenoid directional valve 5, two-position five-way solenoid valve 7, two-position three-way solenoid valve 8, electrical proportional valve 9, electric injection pump 12, hydraulic proportional relief valve 15, motor pump auxiliary 17, and temperature transmitter 20.

[0042] In the above embodiments, by employing automatic control technology, the flow rate can be precisely controlled. The system is equipped with an electrical proportional valve 9 and a hydraulic proportional relief valve 15 to prevent overpressure at the maximum flow rate, and the maximum flow rate value can be set. The oil system exchange section and the pneumatic booster section adopt a fully enclosed cabinet design, and the structural design avoids hydraulic oil loss and environmental pollution caused by oil leakage from the hydraulic assembly system.

[0043] In at least one embodiment of this application, the control device mainly comprises a computer, data acquisition software, a pressure sensor, a data acquisition card, and a signal control system. The pressure sensor converts the directly sensed pressure signal into an electrical signal for processing and transmission. The data acquired by the parameter acquisition section is stored in the data acquisition card, and is used for judgment and control through the control and calculation of the acquisition software. The signal control system is controlled by the computer.

[0044] In the above embodiments, the pressure boosting can be controlled by a computer, and the pressure boosting pressure, pressure boosting time, and pressure holding time can be set to achieve automatic pressure boosting control, display the pressure curve, and store the data in the memory. After the test is completed, the test report can be printed.

[0045] refer to Figure 7 The signal control system adopts a DCS distributed control system based on Ethernet, which offers high efficiency and real-time performance. The system includes a host computer and slave computers, both controlled by a computer. The slave computers use PLCs, while the host computer hardware platform uses an industrial computer and employs LabVIEW as its development platform to develop the corresponding operating software. Both the host and slave computers constitute the control system and are controlled by the computer.

[0046] The lower-level PLC is responsible for acquiring all test sensor signals, switching test procedures, acquiring test flow rates, and handling anomaly detection. The upper-level LabVIEW software receives test standards, test procedures, and test parameters from the lower-level PLC. It can also acquire parameters such as test flow rates, test procedure status, and anomaly conditions from the lower-level PLC, and can display and save test data in real time.

[0047] The following is an example illustrating the method of disassembling and assembling hydraulic cylinders using the integrated hydraulic cylinder maintenance platform described in the above embodiments, with reference to specific embodiments.

[0048] Step 1: First, use a crane to lift the hydraulic cylinder onto the maintenance platform, lock it with the hydraulic cylinder bracket 25, and place the hydraulic cylinder as far as possible at the rear end of the maintenance platform to leave enough space for subsequent piston rod disassembly and assembly.

[0049] Step 2: Remove the flange at the connection between the hydraulic cylinder and the shift fork and use a crane to lift it down; Step 3: Operate the handwheel on the hydraulic piston rod lifting support roller 26 to put the piston rod in the supported state; Step 4: Screw the connecting nut into the threaded part of the piston rod head by rotating the crank handle, and screw it in place. Note that during the operation, you need to operate the handwheel on the telescopic push-pull rod lifting platform 29 to ensure that the piston rod connecting nut 27 and piston rod are aligned. Step 5: Pull the piston rod and piston out of the hydraulic cylinder by operating the crank handle; Step 6: Remove the sealing flange at the tail of the hydraulic cylinder and use a crane to lift it down; Step 7: Inspect the mechanical parts of the hydraulic cylinder and replace the seals; Step 8: Following the reverse steps of pulling out the piston rod, push the piston rod and piston into the hydraulic cylinder; Step 9: Reinstallation and removal steps: Reinstall the sealing flange at the tail of the hydraulic cylinder and the flange on the connecting side of the shift fork box.

[0050] Below, in conjunction with specific embodiments and Figures 8 to 10 An example is given to illustrate the method of conducting hydraulic cylinder sealing tests using the automated hydraulic cylinder sealing test system described in the above embodiment.

[0051] Step 10: Connect the drive air inlet to the local low-pressure air source, adjust the "pressure regulating valve 10" to raise the pressure of the "pressure gauge 11" to 0.7MPa, fill the hydraulic oil tank 19 to two-thirds of its volume, and connect the outlet to the chamber of the cylinder being tested.

[0052] Step 20: First, enter "Trial Run" mode. Start the hydraulic station and open the second pneumatic ball valve 4b and the third pneumatic ball valve 4c, controlled by the hydraulic solenoid directional valve 5. Fill and pressurize hydraulic cylinder A chamber. After the set time, pressurize hydraulic cylinder B chamber by controlling the hydraulic solenoid directional valve 5. The purpose of "Trial Run" is to check the operation of the test cylinder. After setting the parameters "Cylinder Reciprocating Time" and "Number of Runs," click "Start Test" to begin operation. You can observe the "Pressure Curve" or the operation of the "Test Cylinder."

[0053] Step 30: Switch to the "Starting Pressure Characteristic Test" mode, click "Start Test" to start the hydraulic station, open the second pneumatic ball valve 4b and the third pneumatic ball valve 4c, and pressurize the hydraulic cylinder A chamber by controlling the hydraulic solenoid directional valve 5. Collect the starting pressure of the hydraulic cylinder through sensor 2 and observe the specific starting pressure value displayed in the "Starting Pressure Display".

[0054] Step 40: Switch to the "Pressure Resistance Test" mode and set the corresponding "Pressure Resistance Test" parameters in "Test Parameters". Set the holding pressure according to the corresponding pressure of the test piece, and set the allowable pressure drop within the specified time. After setting, click "Start Test". A-Cavity Pressure Resistance Test: Start the gas-liquid booster pump 6, open the first pneumatic ball valve 4a and the third pneumatic ball valve 4c to pressurize the A-cavity of the hydraulic cylinder with oil, and collect the real-time pressure of the hydraulic cylinder through sensor 2; after reaching the set pressure, close the first pneumatic ball valve 4a to hold the pressure, and after the holding time is reached, open the second pneumatic ball valve 4b to release the pressure of the cylinder; B-Cavity Pressure Resistance Test: Start the gas-liquid booster pump 6, open the second pneumatic ball valve 4b and the fourth pneumatic ball valve 4d to pressurize the B-cavity of the hydraulic cylinder with oil, and collect the real-time pressure of the hydraulic cylinder through sensor 2; after reaching the set pressure, close the fourth pneumatic ball valve 4d to hold the pressure, and after the holding time is reached, open the second pneumatic ball valve 4b to release the pressure of the cylinder. The "pressure increase rate" can be adjusted to control the speed of pressure increase. When the pressure reaches the set holding pressure value, the system automatically stabilizes and holds the pressure. When the test is completed, the "buzzer" will sound an alarm. If the alarm is triggered, the next test can be performed directly, or a report can be exported for viewing.

[0055] Step 50: The test procedures for “leakage test”, “cylinder head external leakage test” and “piston internal leakage test” can be carried out with reference to the above “pressure resistance test”.

[0056] Step 60: In "Stroke Verification" mode, first manually measure the length of the extended piston rod and record it in "Stroke Value". Press "Start Test" to start the hydraulic station, open the second pneumatic ball valve 4b and the third pneumatic ball valve 4c, and control the hydraulic solenoid directional valve 5 to pressurize chamber A or B of the hydraulic cylinder. When the pressure in chamber A or B stabilizes, the piston in the hydraulic cylinder is fully extended. Measure the stroke of the hydraulic cylinder using a measuring tool. Record the value in "Stroke Value", and finally click "Stroke Measurement End" to complete the test. The report is saved successfully.

[0057] Step 70: View historical reports. Click "History" in the upper left corner of the main interface, then click "Historical Query Records". In the pop-up dialog box, click the "Clock" icon to set the time period for the query. Select the time and then click "Set as Current Time Period" to confirm. Select the test report you want to query and export it for viewing.

[0058] It should be noted that the combination of the technical features in the embodiments of this application is not limited to the combination methods described in the embodiments of this application or the combination methods described in specific embodiments. All technical features described in this application can be freely combined or combined in any way, unless they contradict each other.

[0059] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that it includes the explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0060] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic cylinder overhaul integrated platform, characterized in that, The hydraulic cylinder maintenance integrated platform comprises a test bench, a hydraulic cylinder support installed on a horizontal plane of the test bench, two liftable hydraulic piston rod lifting support rollers, a piston rod butt joint nut, an extendable push-pull rod and an extendable push-pull rod lifting platform; the hydraulic cylinder support is fixed on the top of the test bench through a sliding block and a sliding rail and is used for supporting the hydraulic cylinder; an oil receiving groove with a slope is designed below the hydraulic cylinder support, and the oil receiving groove is used for receiving the oil dripping from the hydraulic cylinder during disassembly and reassembly; an oil outlet is designed at the bottom of the oil receiving groove; the two liftable hydraulic piston rod lifting support rollers are fixed on the top of the test bench through a sliding block and a sliding rail; the extendable push-pull rod is connected between the piston rod butt joint nut and the extendable push-pull rod lifting platform; the two liftable hydraulic piston rod lifting support rollers are arranged in parallel between the hydraulic cylinder support and the extendable push-pull rod lifting platform, and the distance between the two liftable hydraulic piston rod lifting support rollers is adjustable.

2. The hydraulic cylinder overhaul integrated platform of claim 1, wherein, The roller of the hydraulic piston rod lifting support roller adopts a V-shaped structure design; and / or the hydraulic cylinder support adopts a V-shaped design.

3. The hydraulic cylinder overhaul integrated platform of claim 1, wherein, The adjustable foot is further included, wherein the adjustable foot is arranged below the test bench and is used for moving and fixing the test bench.

4. The hydraulic cylinder overhaul integrated platform of claim 1, wherein, A stainless steel scale is designed on one side of the sliding rail.

5. The hydraulic cylinder overhaul integrated platform of any one of claims 1 to 4, wherein, The extendable push-pull rod lifting platform is provided with a loading oil cylinder installed at the bottom.

6. An automated hydraulic cylinder seal testing system, comprising: The hydraulic cylinder maintenance integrated platform comprises a test bench, a hydraulic cylinder support installed on a horizontal plane of the test bench, two liftable hydraulic piston rod lifting support rollers, a piston rod butt joint nut, an extendable push-pull rod and an extendable push-pull rod lifting platform; the hydraulic cylinder support is fixed on the top of the test bench through a sliding block and a sliding rail and is used for supporting the hydraulic cylinder; an oil receiving groove with a slope is designed below the hydraulic cylinder support, and the oil receiving groove is used for receiving the oil dripping from the hydraulic cylinder during disassembly and reassembly; an oil outlet is designed at the bottom of the oil receiving groove; the two liftable hydraulic piston rod lifting support rollers are fixed on the top of the test bench through a sliding block and a sliding rail; the extendable push-pull rod is connected between the piston rod butt joint nut and the extendable push-pull rod lifting platform; the two liftable hydraulic piston rod lifting support rollers are arranged in parallel between the hydraulic cylinder support and the extendable push-pull rod lifting platform, and the distance between the two liftable hydraulic piston rod lifting support rollers is adjustable. The roller of the hydraulic piston rod lifting support roller adopts a V-shaped structure design; and / or the hydraulic cylinder support adopts a V-shaped design.

7. The hydraulic cylinder leak test system of claim 6, wherein, The adjustable foot is further included, wherein the adjustable foot is arranged below the test bench and is used for moving and fixing the test bench.

8. The hydraulic cylinder leak test system of claim 6, wherein, A stainless steel scale is designed on one side of the sliding rail. The extendable push-pull rod lifting platform is provided with a loading oil cylinder installed at the bottom. The hydraulic cylinder maintenance integrated platform comprises a test bench, a hydraulic cylinder support installed on a horizontal plane of the test bench, two liftable hydraulic piston rod lifting support rollers, a piston rod butt joint nut, an extendable push-pull rod and an extendable push-pull rod lifting platform; the hydraulic cylinder support is fixed on the top of the test bench through a sliding block and a sliding rail and is used for supporting the hydraulic cylinder; an oil receiving groove with a slope is designed below the hydraulic cylinder support, and the oil receiving groove is used for receiving the oil dripping from the hydraulic cylinder during disassembly and reassembly; an oil outlet is designed at the bottom of the oil receiving groove; the two liftable hydraulic piston rod lifting support rollers are fixed on the top of the test bench through a sliding block and a sliding rail; the extendable push-pull rod is connected between the piston rod butt joint nut and the extendable push-pull rod lifting platform; the two liftable hydraulic piston rod lifting support rollers are arranged in parallel between the hydraulic cylinder support and the extendable push-pull rod lifting platform, and the distance between the two liftable hydraulic piston rod lifting support rollers is adjustable. The roller of the hydraulic piston rod lifting support roller adopts a V-shaped structure design; and / or the hydraulic cylinder support adopts a V-shaped design. The adjustable foot is further included, wherein the adjustable foot is arranged below the test bench and is used for moving and fixing the test bench. A stainless steel scale is designed on one side of the sliding rail. The extendable push-pull rod lifting platform is provided with a loading oil cylinder installed at the bottom.

9. The hydraulic cylinder leak test system of claim 6, wherein, The hydraulic pressure generating device comprises an oil system exchange part and a pneumatic supercharging part. The main components of the oil system exchange part are a high-pressure pressure gauge, a sensor, a high-pressure filter, a pneumatic ball valve, a hydraulic electromagnetic reversing valve, an accumulator, a pressure pipeline filter, a hydraulic proportional overflow valve, a check valve, a motor pump auxiliary, an air cooler, a hydraulic oil tank and a temperature transmitter. The pneumatic ball valve comprises a first pneumatic ball valve, a second pneumatic ball valve, a third pneumatic ball valve and a fourth pneumatic ball valve. The main components of the pneumatic supercharging part are a gas-liquid supercharging pump, a two-position five-way electromagnetic valve, a two-position three-way electromagnetic valve, an electric proportional valve, a pressure regulating valve and an electric liquid injection pump. The temperature transmitter is connected to the outer wall of the hydraulic oil tank, and the probe monitors the oil temperature. The compressed air in the air source enters the chamber at one end of the piston of the gas-liquid supercharging pump through the two-position five-way electromagnetic valve, the pressure regulating valve, the electric proportional valve and the two-position three-way electromagnetic valve. At the same time, the electric liquid injection pump delivers the oil in the hydraulic oil tank to the chamber at the other end of the piston of the gas-liquid supercharging pump. The oil pressure is increased by the pressure of the gas, which pushes the piston. The oil with a certain pressure enters the A cavity / B cavity through the first pneumatic ball valve and the fourth pneumatic ball valve, the high-pressure filter, the sensor and the high-pressure pressure gauge, respectively. Oil discharge: the oil enters the oil tank through the high-pressure pressure gauge, the sensor, the high-pressure filter, the second pneumatic ball valve, the third pneumatic ball valve, the hydraulic electromagnetic reversing valve, the air cooler, respectively, or enters the oil tank through the high-pressure pressure gauge, the sensor, the pressure pipeline filter, the hydraulic proportional overflow valve and the air cooler.

10. An automated hydraulic cylinder leak test system according to any one of claims 6 to 9, wherein, The control device mainly comprises a computer, acquisition software, a pressure sensor, a data acquisition card and a signal control system. The pressure sensor is used to convert the directly perceived pressure signal into an electric signal for processing and transmission. The data collected by the parameter acquisition part is stored in the data acquisition card, and is controlled and operated by the acquisition software for judgment and control. The signal control system is controlled by the computer.

Images