Oil pressure flow divider detection device and detection method thereof

Abstract

The application discloses an oil pressure flow divider detection device and a detection method thereof, and the device comprises an inlet butt joint unit, a liquid distribution detection unit, an overflow valve detection unit and an intelligent control unit. The application adopts gas medium to replace oil liquid, and realizes switching of a detection gas circuit through a unique telescopic pipe unit: when retracted, liquid distribution channel flow detection is carried out, and when extended, the gas is guided to the overflow valve. In view of the detection difficulty of the overflow valve, a center pin mechanism driven by a third electric cylinder and fed back by a pressure sensor is designed, which can actively push open the overflow valve core and accurately measure the opening pressure. The application is also provided with a sealing detection unit for the interface, which verifies the clamping sealing property before detecting the product performance. The method realizes automatic and integrated detection of the interface sealing, liquid distribution flow and overflow valve performance of the oil pressure flow divider. The application fundamentally solves the oil pollution problem of the traditional hydraulic detection, and has the remarkable advantages of being clean, efficient and accurate.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic splitter testing, specifically relating to a hydraulic splitter testing device and its testing method. Background Technology

[0002] As a key component in a hydraulic system, the reliability of the hydraulic distributor directly affects the operational stability of the entire system. Therefore, before leaving the factory, the hydraulic distributor must undergo rigorous testing of its various performance parameters, primarily including: the flow balance of each distribution channel, the sealing of the channels and interfaces, and the opening pressure and sealing performance of the built-in relief valve. The specific structure of the hydraulic distributor is as follows: Figures 1-6 As shown.

[0003] Currently, the industry commonly uses hydraulic testing methods to test hydraulic distributors. This involves injecting hydraulic oil into the distributor using a hydraulic pump to completely simulate its real working environment, and then determining its performance by measuring the oil flow rate at each outlet, observing changes in pressure gauge readings, or checking for leaks.

[0004] However, this traditional hydraulic testing method has many inherent drawbacks:

[0005] The harsh working environment impacts health and safety: During testing, oil leaks or splashes are highly likely to occur at the hydraulic distributor, testing pipelines, and joints, resulting in oil stains covering the testing area. This not only causes serious pollution of the working environment but also increases the risk of slipping due to oil contamination, posing a safety hazard. Furthermore, prolonged exposure to an oil-filled environment also threatens the health of operators.

[0006] The testing process is costly and inefficient: After testing, the tested hydraulic distributor requires complex cleaning and degreasing to prevent oil residue from affecting subsequent packaging or transportation. This process consumes a significant amount of time and cleaning agents, increasing production costs. Furthermore, the hydraulic testing equipment itself is bulky, and the complex piping connections further contribute to low testing efficiency.

[0007] Significant environmental pressure: Leaked hydraulic oil and waste liquid used for cleaning are both hazardous wastes, and their disposal requires strict adherence to environmental regulations. This not only involves cumbersome procedures but also incurs additional disposal costs, placing considerable environmental pressure on enterprises.

[0008] Therefore, there is an urgent need in this field for a testing solution that can eliminate dependence on hydraulic oil, aiming to achieve clean, efficient, and safe testing. Using gas as a medium to replace hydraulic fluid for testing is an ideal research direction. Gases have advantages such as cleanliness, no pollution, and good fluidity. However, how to accurately and reliably use gas to test the various performance characteristics of hydraulic distributors originally designed for hydraulic environments, especially simulating hydraulic pressure and testing the opening pressure of the relief valve, has become a key technical challenge. Developing a dedicated testing device and method that uses a gas medium and can comprehensively evaluate the performance of hydraulic distributors is of great significance for improving the automation level of testing work, improving the working environment, and reducing production costs. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a hydraulic distributor testing device and its testing method.

[0010] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0011] A hydraulic distributor testing device includes an inlet docking unit, a liquid distribution detection unit, an overflow valve detection unit, and an intelligent control unit. The inlet docking unit includes an air inlet pipe and an air inlet interface for the hydraulic distributor. One end of the air inlet pipe is connected to an external air source, and the other end is connected to the air inlet interface for the hydraulic distributor. The air inlet interface is used to connect with the oil inlet of the hydraulic distributor. Each oil outlet of the hydraulic distributor is equipped with a liquid distribution detection unit and an overflow valve detection unit. The liquid distribution detection unit includes an outer pipe, an air outlet interface for the hydraulic distributor, a first air outlet pipe, and a first gas flow meter. One end of the outer pipe is connected to the air outlet interface for the hydraulic distributor, and the air outlet interface is used to connect with the oil outlet of the hydraulic distributor. One end of the first air outlet pipe is connected to the side wall of the outer pipe, and the other end is connected to the outside. The first gas flow meter is installed on the first air outlet pipe to detect the gas flow rate of the first air outlet pipe. The overflow valve detection unit includes a third electric cylinder and a pressure... The system includes a sensor, a ejector pin, an overflow port connector, a third outlet pipe, and a third gas flow meter. The telescopic shaft of the third electric cylinder is connected to a pressure sensor. The pressure sensor is connected to one end of the ejector pin, and the other end of the ejector pin can be placed at the inlet of the overflow valve of the hydraulic distributor via the oil outlet. The overflow port connector is used to connect with the outlet of the overflow valve and is connected to one end of the third outlet pipe. The other end of the third outlet pipe is connected to the outside. The third gas flow meter is installed on the third outlet pipe to detect the gas flow rate of the third outlet pipe. The third electric cylinder can push the ejector pin to move and open the inlet of the overflow valve. The pressure sensor is used to sense the force received by the ejector pin. The intelligent control unit is connected to the first gas flow meter, the third electric cylinder, the pressure sensor, and the third gas flow meter. The intelligent control unit can control the operation of the third electric cylinder and receive information from the first gas flow meter, the pressure sensor, and the third gas flow meter.

[0012] To optimize the above technical solution, the specific measures also include:

[0013] Each hydraulic distributor inlet and outlet port is equipped with a sealing detection unit. This unit includes a sealing ring, a second outlet pipe, a second gas flow meter, and an annular plate. The sealing ring is fixed to the outside of the corresponding hydraulic distributor inlet or outlet port via the annular plate. When the hydraulic distributor inlet or outlet port is aligned with the oil inlet or outlet port, the sealing ring abuts against the outer surface of the hydraulic distributor, creating a sealing detection space between the inner side of the sealing ring, the annular plate, the outer surface of the hydraulic distributor, and the outer side of the corresponding hydraulic distributor inlet or outlet port. One end of the second outlet pipe is located on the annular plate and communicates with the sealing detection space, while the other end communicates with the outside. The second gas flow meter is installed on the second outlet pipe to detect the gas flow rate. The second gas flow meter is connected to the intelligent control unit and can send information to the intelligent control unit.

[0014] The outer tube has an axial cavity, and a telescopic tube unit is installed inside the cavity. The telescopic tube unit includes an inner tube and a second electric cylinder. The second electric cylinder is fixedly installed in the cavity of the outer tube, and the inner tube is slidably installed in the cavity of the outer tube. The outer wall of the inner tube is sealed to the inner wall of the outer tube. The telescopic shaft of the second electric cylinder is fixedly connected to one end of the inner tube. The second electric cylinder can push the inner tube to extend and retract in the cavity of the outer tube. When the inner tube extends, the outer wall of the inner tube seals the connection between the first vent pipe and the outer tube. When the inner tube retracts, the inner tube no longer seals the connection between the first vent pipe and the outer tube. The inner tube has an axial cavity. A third electric cylinder is fixedly installed in the cavity of the inner tube, and a ejector pin is slidably installed in the cavity of the inner tube. The ejector pin is sealed to the inner wall of the inner tube. The third electric cylinder can push the ejector pin to extend and retract in the cavity of the inner tube. The other end of the ejector pin extends from the other end of the inner tube. The intelligent control unit is connected to the third electric cylinder and can control the operation of the third electric cylinder.

[0015] The hydraulic distributor testing device also includes a workstation unit, which comprises a workstation body, a workstation groove, a distributor guide groove, a housing, and a first electric cylinder. The workstation groove is located on the workstation body, and its depth is adapted to the thickness of the hydraulic distributor. The distributor guide groove is located within the workstation groove, and its width is the same as the width of the hydraulic distributor. When the hydraulic distributor is placed in the distributor guide groove, it can slide back and forth along the groove. The hydraulic distributor's air inlet is mounted on the front surface of the workstation groove. The housing is slidably mounted within the workstation groove. The liquid separation testing unit is installed... The hydraulic distributor has its air outlet and overflow port docking seat located on the front surface of the housing. The first electric cylinder is fixed to the rear end of the work station groove. The telescopic shaft of the first electric cylinder is fixedly connected to the housing. The first electric cylinder can drive the housing to move back and forth. When the housing moves forward, it can cooperate with the front surface of the work station groove to clamp the hydraulic distributor. This allows the hydraulic distributor's air inlet to dock with the hydraulic distributor's oil inlet, the hydraulic distributor's air outlet to dock with the hydraulic distributor's oil outlet, and the overflow port docking seat to dock with the overflow valve's outlet. The intelligent control unit is connected to the first electric cylinder and can control the operation of the first electric cylinder.

[0016] A front-to-back guide rail is provided on the left and right sides of the workstation groove. Slider is fixed on both the left and right sides of the housing and slides on the housing guide rail.

[0017] The mating surfaces of the air inlet port and the oil inlet port of the hydraulic distributor, the air outlet port and the oil outlet port of the hydraulic distributor, and the overflow port mating surface and the outlet of the overflow valve are all provided with rubber layers. The side of the sealing ring that contacts the hydraulic distributor is also provided with a rubber layer.

[0018] The housing is equipped with a fixed frame, and the outer tube, the first gas flow meter, the third gas flow meter, and the second gas flow meter located at the outlet of the oil pressure distributor are all fixedly installed on the fixed frame. The housing is provided with a vent.

[0019] The hydraulic distributor has an oil inlet on the front side and several oil outlets on the rear side. The hydraulic distributor has the same number of relief valves as the oil outlets. The valve core of the relief valve is coaxial with the oil outlet, and the inlet of the relief valve is directly opposite the oil outlet. The pressure relief holes of each relief valve are connected to the same outlet, which is located on the rear side of the hydraulic distributor.

[0020] A method for testing a hydraulic splitter, using the aforementioned hydraulic splitter testing device, specifically includes the following steps:

[0021] S1. Clamping and docking steps: Place the hydraulic distributor on the workstation unit, control the first electric cylinder to push the outer shell forward, so that the air inlet of the hydraulic distributor is docked with the oil inlet of the hydraulic distributor, the air outlet of the hydraulic distributor is docked with the oil outlet of the hydraulic distributor, and at the same time the overflow docking seat is docked with the outlet of the overflow valve.

[0022] S2. Sealing Inspection Steps: The telescopic tube unit of the liquid separation detection unit is extended, ensuring the inner tube seals the connection between the first outlet pipe and the outer pipe. Gas is introduced into the hydraulic distributor via an external gas source and inlet pipe, ensuring the gas pressure is less than the overflow valve opening pressure. If any interface seal is unqualified, gas can enter the corresponding sealing inspection space through the gap between the interface and the inlet or outlet of the hydraulic distributor, causing the second gas flow meter to detect a change in value. The intelligent control unit reads the values ​​of each second gas flow meter to determine if the seal at each interface is qualified. If unqualified, an alarm is triggered and the process terminates.

[0023] S3, Liquid Separation Channel Detection Steps: Maintain ventilation, control the telescopic tube unit of the liquid separation detection unit to be in the retracted state, and open the connection between the first vent pipe and the outer pipe; the intelligent control unit reads the value of the first gas flow meter of each liquid separation detection unit to determine whether the flow rate of each liquid separation channel of the oil pressure distributor is qualified.

[0024] S4. Overflow valve testing steps:

[0025] S4.1 Control the telescopic tube unit to be in the extended state, so that the inner tube closes the connection between the first gas outlet tube and the outer tube, and directs the gas towards the overflow valve.

[0026] S4.2. While keeping the other third electric cylinders from extending, the intelligent control unit controls one of the third electric cylinders to push the ejector pin against the valve core of the corresponding overflow valve. During this process, the pressure value of the pressure sensor is read in real time. When the third gas flow meter detects a sudden increase in gas flow, the value of the pressure sensor at this time is recorded. This value is the opening pressure of the overflow valve. The intelligent control unit determines whether the opening pressure of the overflow valve is within the predetermined range. If it is, it is qualified; if it is not, it is unqualified.

[0027] S4.3 Control the third electric cylinder to continue advancing, so that the overflow valve is in a fully open state. The intelligent control unit reads the value of the third gas flow meter and judges whether the flow or sealing performance of the overflow valve in the fully open state is qualified.

[0028] S4.4 Retract the third electric cylinder. Then, the intelligent control unit controls the second and third electric cylinders to push the ejector pin against the valve core of the corresponding overflow valve. Repeat steps S4.2 and S4.3 until all overflow valves have been detected.

[0029] S5. Result Judgment and Reset Steps: The intelligent control unit integrates the detection data from steps S2, S3, and S4 to determine whether the hydraulic distributor is qualified or not; subsequently, it controls each electric cylinder to reset and removes the hydraulic distributor under test.

[0030] In steps S2 and S3, the gas pressure introduced into the hydraulic distributor is set to the gas pressure value under the normal operating pressure of the hydraulic distributor.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. This invention uses compressed air or inert gas as the detection medium, completely replacing traditional hydraulic oil and fundamentally solving the problems of oil leakage and splashing caused by the original hydraulic detection method. The testing site is no longer covered in oil stains, eliminating the safety hazard of slipping and protecting the health of operators. At the same time, it avoids the consumption of hydraulic oil and hazardous waste disposal, meeting the requirements of green manufacturing. After the test is completed, the tested hydraulic pressure distributor does not require complicated cleaning and degreasing procedures, saving a lot of time and costs.

[0033] 2. This invention integrates multiple detection functions, including the sealing performance of the distributor body, the flow rate of each dispensing channel, and the opening pressure and sealing performance of the overflow valve, into a single device. The entire process is automated through an intelligent control unit. Operators only need to clamp the workpiece, and the device automatically completes all detection items, avoiding the tedious process of multiple clamping operations, tooling changes, and manual data recording in traditional methods, thus improving detection efficiency several times over. All detection data is automatically collected by sensors and processed and judged in real time by the intelligent control unit, eliminating errors from subjective human judgment and making the detection results more objective, accurate, and traceable. When a detection fails, the system can immediately determine whether it is due to interface leakage, channel blockage, or overflow valve failure, facilitating rapid location and repair.

[0034] 3. This invention, through a unique "electric cylinder-ejector-pressure sensor" linkage design, successfully simulates the effect of oil pressure on the relief valve core, solving the key technical challenge of using gas to detect oil pressure in relief valves. The ejector pin directly applies mechanical force to open the valve core, and a high-precision pressure sensor detects the force value at the moment of opening in real time. The calculated opening pressure value is accurate and reliable, showing a high degree of consistency with hydraulic detection results. The same ejector pin mechanism is used both to measure the opening pressure and to detect the sealing or flow rate in the fully open state after the valve core is opened; its ingenious structure achieves functional reuse.

[0035] 4. The "telescopic tube unit" designed in this invention cleverly achieves intelligent switching of the detection gas path through the extension and retraction of the inner tube. When the inner tube retracts, the gas flows to the first outlet pipe for detecting the flow rate of the liquid distribution channel; when the inner tube extends, the bypass is closed, and the gas flows directly to the overflow valve for overflow valve detection and sealing detection of each interface. This design simplifies the complex valve and piping system into a linear motion mechanism, greatly simplifying the pipeline layout, reducing potential leakage points, and improving the reliability and compactness of the device.

[0036] 5. The "interface sealing detection unit" added to this invention can verify the sealing of all mating interfaces between the testing device and the tested distributor before testing the distributor's own performance. This effectively avoids data distortion caused by external factors such as improper clamping, ensuring the accuracy and validity of subsequent product performance testing results, providing "double insurance" for the test results. In addition, some distributors may have deformed inlet and outlet ports due to transportation collisions or other factors before testing. Such distributors are obviously unqualified. Therefore, by detecting the interface sealing, such defective products with deformed inlet and outlet ports can also be detected, improving the accuracy of the test.

[0037] 6. The entire device is highly integrated, with standardized operating procedures and a user-friendly human-machine interface. Workers only need simple training to start working, reducing reliance on skilled operators and facilitating the rapid promotion and application of this technology within the industry. Attached Figure Description

[0038] Figure 1 This is the left view of the hydraulic distributor;

[0039] Figure 2 This is the front view of the hydraulic distributor;

[0040] Figure 3 This is a rear view of the hydraulic distributor;

[0041] Figure 4 This is a top view of the hydraulic distributor;

[0042] Figure 5 yes Figure 1 AA section view;

[0043] Figure 6 yes Figure 1 BB section view;

[0044] Figure 7 This is a schematic diagram of a workstation having three oil pressure distributor detection devices of the present invention;

[0045] Figure 8 yes Figure 7 CC section view;

[0046] Figure 9 yes Figure 7 DD sectional view;

[0047] Figure 10 This is an internal structural diagram of the hydraulic distributor detection device of the present invention;

[0048] Figure 11 yes Figure 10 Enlarged view of part E;

[0049] Figure 12 yes Figure 10 Enlarged view of part F;

[0050] Figure 13 yes Figure 10 Enlarged view of part G;

[0051] Figure 14 This is a state diagram of the present invention during the liquid separation channel detection step;

[0052] Figure 15 yes Figure 14 Enlarged view of the H section;

[0053] Figure 16 yes Figure 14 Enlarged view of Part I;

[0054] Figure 17 This is a state diagram of the present invention during the docking sealing test step;

[0055] Figure 18 yes Figure 17 Enlarged view of part J;

[0056] Figure 19 This is a state diagram of the present invention during the overflow valve detection step;

[0057] Figure 20 yes Figure 19 Enlarged view of part K;

[0058] Figure 21 yes Figure 19 Enlarged view of the L section;

[0059] The attached diagram is labeled as follows: Inlet docking unit 1, air inlet pipe 11, hydraulic distributor air inlet docking port 12, liquid separation detection unit 2, outer pipe 21, hydraulic distributor air outlet docking port 22, first air outlet pipe 23, first gas flow meter 24, docking port sealing detection unit 3, sealing ring 31, second air outlet pipe 32, second gas flow meter 33, annular plate 34, overflow valve detection unit 4, third electric cylinder 41, pressure sensor 42, ejector pin 43, overflow port docking seat 44, third air outlet pipe 45, third gas flow meter 46, intelligent control unit 5, hydraulic distributor 6, oil inlet 61, oil outlet 62, overflow valve 63, telescopic pipe unit 7, inner pipe 71, second electric cylinder 72, workstation unit 8, workstation groove 81, distributor guide groove 82, outer shell 83, first electric cylinder 84, outer shell guide rail 85, slider 86, fixing frame 87, vent 88. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0061] like Figures 7 to 13 As shown, the hydraulic distributor testing device in this embodiment mainly includes an inlet docking unit 1, a liquid distribution testing unit 2, a docking interface sealing testing unit 3, an overflow valve testing unit 4, an intelligent control unit 5, a telescopic tube unit 7, and a workstation unit 8.

[0062] The workstation unit 8 constitutes the main frame of the device. For example... Figure 7 , Figure 8 and Figure 9 As shown, the workstation unit 8 includes a workstation body, a workstation groove 81, a distributor guide groove 82, a housing 83, and a first electric cylinder 84. The workstation groove 81 is located on the workstation body, and its depth is adapted to the thickness of the hydraulic distributor 6 to be tested. The distributor guide groove 82 is located in the workstation groove 81, and its left and right widths are the same as the width of the hydraulic distributor 6, allowing the hydraulic distributor 6 to slide back and forth along it for initial positioning. To ensure smooth movement of the housing 83, a front-to-back housing guide rail 85 is provided on the left and right sides of the workstation groove 81, respectively. Slider blocks 86 are fixed on both the left and right sides of the housing 83, and the sliders 86 are slidably mounted on the housing guide rails 85. The first electric cylinder 84 is fixed to the rear end of the workstation groove 81, and its telescopic shaft is fixedly connected to the housing 83, used to drive the housing 83 to move back and forth.

[0063] The inlet docking unit 1 includes an air inlet pipe 11 and an oil pressure distributor air inlet interface 12. One end of the air inlet pipe 11 is connected to an external air source, and the other end is connected to the oil pressure distributor air inlet interface 12. The oil pressure distributor air inlet interface 12 is fixedly installed on the front surface of the workstation groove 81 and is used to dock with the oil inlet 61 of the oil pressure distributor 6. To improve sealing, a rubber layer is provided on the docking surface.

[0064] Both the liquid separation detection unit 2 and the overflow valve detection unit 4 are installed inside the housing 83. The liquid separation detection unit 2 includes an outer pipe 21, an oil pressure distributor outlet port 22, a first outlet pipe 23, and a first gas flow meter 24. One end of the outer pipe 21 is connected to the oil pressure distributor outlet port 22, which is located on the front surface of the housing 83. This port is used to connect with the oil outlet 62 of the oil pressure distributor 6. One end of the first outlet pipe 23 is connected to the side wall of the outer pipe 21, and the other end is connected to the outside. The first gas flow meter 24 is installed on the first outlet pipe 23 to detect its gas flow rate.

[0065] The overflow valve detection unit 4 includes a third electric cylinder 41, a pressure sensor 42, a ejector pin 43, an overflow port docking seat 44, a third vent pipe 45, and a third gas flow meter 46. The overflow port docking seat 44 is located on the front surface of the housing 83 and is used to dock with the outlet of the overflow valve 63 of the hydraulic distributor 6. One end of the third vent pipe 45 is connected to the overflow port docking seat 44, and the other end is connected to the outside. The third gas flow meter 46 is mounted on the third vent pipe 45.

[0066] The outer tube 21 has an axial cavity, within which a telescopic tube unit 7 is installed. The telescopic tube unit 7 includes an inner tube 71 and a second electric cylinder 72. The second electric cylinder 72 is fixed within the cavity of the outer tube 21, and its telescopic shaft is fixed to one end of the inner tube 71, allowing the inner tube 71 to slide telescopically within the outer tube 21. The outer wall of the inner tube 71 and the inner wall of the outer tube 21 are in a sealing fit. Figure 17 and Figure 18 As shown, when the inner tube 71 is pushed out by the second electric cylinder 72, its outer wall will seal the connection between the first vent pipe 23 and the outer tube 21. When the inner tube 71 retracts, the interface of the first vent pipe 23 is opened.

[0067] The third electric cylinder 41 is fixedly installed inside the cavity of the inner tube 71. Its telescopic shaft is connected to the pressure sensor 42, which in turn is connected to one end of the ejector pin 43. The ejector pin 43 can slide and is sealed within the inner tube 71. The third electric cylinder 41 can push the ejector pin 43, causing its front end to extend out from the front end of the inner tube 71. The mating surface between the overflow port docking seat 44 and the outlet of the overflow valve 63 is also provided with a rubber layer.

[0068] To test the sealing performance of the mating surfaces, a mating surface sealing test unit 3 is installed at the inlet port 12 and the outlet port 22 of each hydraulic distributor. This unit includes a sealing ring 31, a second outlet pipe 32, a second gas flow meter 33, and an annular plate 34. The sealing ring 31 is fixed to the outside of the mating surface via the annular plate 34. When the port is mated with the hydraulic distributor 6, the sealing ring 31 presses tightly against the outer surface of the hydraulic distributor 6, forming a sealed "sealing test space." One end of the second outlet pipe 32 communicates with this space, and the other end is fitted with the second gas flow meter 33. The contact surface of the sealing ring 31 also has a rubber layer.

[0069] To centrally house the internal components, a mounting bracket 87 is provided inside the housing 83. The outer tube 21, the first gas flow meter 24, the third gas flow meter 46, and the corresponding second gas flow meter 33 are all fixed on the mounting bracket 87. For easy ventilation, a vent 88 is provided on the housing 83.

[0070] The intelligent control unit 5 is a PLC or industrial computer, equipped with a screen and input buttons. It is electrically connected to the first electric cylinder 84, the second electric cylinder 72, the third electric cylinder 41, the first gas flow meter 24, the second gas flow meter 33, the pressure sensor 42, and the third gas flow meter 46. The intelligent control unit 5 can control the actions of each electric cylinder and receive and process data from all sensors, thus achieving automated detection processes and result determination.

[0071] This invention also provides a method for detecting hydraulic splitters:

[0072] This embodiment uses the above-mentioned detection device, and its detection process is as follows: Figures 14 to 21 As shown, the specific steps include:

[0073] S1. Clamping and docking steps:

[0074] The hydraulic distributor 6 is pushed into the work station groove 81 along the distributor guide groove 82. The intelligent control unit 5 controls the first electric cylinder 84 to push the outer shell 83 forward, so that the hydraulic distributor air inlet port 12, hydraulic distributor air outlet port 22 and overflow port docking seat 44 are automatically aligned and pressed with the oil inlet port 61, oil outlet port 62 and overflow valve 63 outlet of the hydraulic distributor 6, respectively, to complete the clamping.

[0075] S2. Dock sealing test procedure:

[0076] like Figure 17 , Figure 18As shown, the intelligent control unit 5 controls all the telescopic tube units 7 of the liquid separation detection units 2 to be in the extended state, so that the inner tube 71 seals the interface of the first vent pipe 23. Subsequently, pressurized gas (this pressure is lower than the opening pressure of the overflow valve 63) is introduced into the oil pressure distributor 6 through the inlet pipe 11 via an external gas source. At this time, if there is a leak at any docking interface, gas will enter the corresponding "sealing detection space" from the gap, causing the reading of the second gas flow meter 33 at that location to change. The intelligent control unit 5 reads the values ​​of all the second gas flow meters 33. If any value exceeds the standard, it determines that the seal is unqualified, issues an alarm, and terminates the process.

[0077] S3, Liquid Separation Channel Testing Procedure:

[0078] like Figure 14 , Figure 15 , Figure 16 As shown, with ventilation maintained, the intelligent control unit 5 controls all telescopic tube units 7 of the liquid distribution detection units 2 to be in the retracted state, opening the interface of the first vent pipe 23. Gas will flow through the internal channel of the oil pressure distributor 6, flow out from each oil outlet 62, and be discharged through the first vent pipe 23. The intelligent control unit 5 reads the values ​​of each first gas flow meter 24 to determine whether the flow rate of each liquid distribution channel is balanced and meets the standard.

[0079] S4. Overflow valve testing steps:

[0080] S4.1, such as Figure 19 , Figure 20 , Figure 21 As shown, all telescopic tube units 7 are controlled to be extended again, the first vent pipe 23 is closed, and the gas passage is directed to the overflow valve 63.

[0081] S4.2 The intelligent control unit 5 controls one of the third electric cylinders 41 to push the ejector pin 43, which pushes against the corresponding overflow valve 63 valve core. During this process, the pressure value of the pressure sensor 42 is read in real time. When the third gas flow meter 46 detects a sudden increase in gas flow, it indicates that the overflow valve 63 has been opened. The value of the pressure sensor 42 at this moment is recorded, which is the opening pressure of the overflow valve 63, and its qualification is determined.

[0082] S4.3 Control the third electric cylinder 41 to continue advancing, so that the overflow valve 63 is fully opened, read the stable value of the third gas flow meter 46, and determine whether the flow capacity or sealing performance of the overflow valve in the fully open state is qualified.

[0083] S4.4 Retract the ejector pin 43 of the third electric cylinder 41, and then repeat steps S4.2 and S4.3 for the next relief valve 63 in sequence until all relief valves have been tested.

[0084] S5. Result Judgment and Reset Procedures:

[0085] The intelligent control unit 5 integrates all the detection data from steps S2, S3, and S4 to make a final judgment on whether the overall performance of the hydraulic distributor 6 is qualified or not. Subsequently, it controls the first electric cylinder 84, the second electric cylinder 72, and the third electric cylinder 41 to reset, allowing the operator to remove the workpiece under test.

[0086] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0087] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A hydraulic distributor detection device, characterized in that: The system includes an inlet docking unit (1), a liquid separation detection unit (2), an overflow valve detection unit (4), and an intelligent control unit (5). The inlet docking unit (1) includes an air inlet pipe (11) and an oil pressure distributor air inlet interface (12). One end of the air inlet pipe (11) is connected to an external air source, and the other end is connected to the oil pressure distributor air inlet interface (12). The oil pressure distributor air inlet interface (12) is used to dock with the oil inlet (61) of the oil pressure distributor (6). Each oil outlet (62) of the oil pressure distributor (6) is equipped with a liquid separation detection unit (2) and an overflow valve detection unit (4). The liquid separation detection unit (2) includes an outer pipe (21), an oil... The system includes a hydraulic splitter outlet port (22), a first outlet pipe (23), and a first gas flow meter (24). One end of the outer pipe (21) is connected to the hydraulic splitter outlet port (22), which is used to connect with the oil outlet (62) of the hydraulic splitter (6). One end of the first outlet pipe (23) is connected to the side wall of the outer pipe (21), and the other end is connected to the outside. The first gas flow meter (24) is installed on the first outlet pipe (23) to detect the gas flow of the first outlet pipe (23). The overflow valve detection unit (4) includes a third electric cylinder (41), a pressure sensor (42), a pin (43), and an overflow port. The assembly includes a docking seat (44), a third exhaust pipe (45), and a third gas flow meter (46). The telescopic shaft of the third electric cylinder (41) is connected to a pressure sensor (42). The pressure sensor (42) is connected to one end of a push pin (43). The other end of the push pin (43) can be pushed against the inlet of the overflow valve (63) of the hydraulic distributor (6) through the oil outlet (62). The overflow port docking seat (44) is used to dock with the outlet of the overflow valve (63). The overflow port docking seat (44) is connected to one end of the third exhaust pipe (45). The other end of the third exhaust pipe (45) is connected to the outside. The third gas flow meter (46) is installed on the third electric cylinder (41). The three-outlet pipe (45) is used to detect the gas flow rate of the third outlet pipe (45). The third electric cylinder (41) can push the ejector pin (43) to move and open the inlet of the overflow valve (63). The pressure sensor (42) is used to sense the force received by the ejector pin (43). The intelligent control unit (5) is connected to the first gas flow meter (24), the third electric cylinder (41), the pressure sensor (42) and the third gas flow meter (46) respectively. The intelligent control unit (5) can control the operation of the third electric cylinder (41) and receive information from the first gas flow meter (24), the pressure sensor (42) and the third gas flow meter (46).

2. The hydraulic distributor detection device according to claim 1, characterized in that: Each hydraulic distributor inlet port (12) and each hydraulic distributor outlet port (22) is equipped with an interface sealing detection unit (3). The interface sealing detection unit (3) includes a sealing ring (31), a second outlet pipe (32), a second gas flow meter (33), and an annular plate (34). The sealing ring (31) is fixedly installed on the outside of the corresponding hydraulic distributor inlet port (12) or hydraulic distributor outlet port (22) through the annular plate (34). When the hydraulic distributor inlet port (12) or hydraulic distributor outlet port (22) is connected to the oil inlet (61) or oil outlet (62) of the hydraulic distributor (6), the sealing ring (31) is sealed on the outside of the corresponding hydraulic distributor inlet port (12) or hydraulic distributor outlet port (22). The sealing ring (31) abuts against the outer surface of the hydraulic distributor (6), so that the inner side of the sealing ring (31), the annular plate (34), the outer surface of the hydraulic distributor (6) and the outer side of the corresponding hydraulic distributor inlet port (12) or hydraulic distributor outlet port (22) form a sealing detection space. One end of the second outlet pipe (32) is opened on the annular plate (34) and communicates with the sealing detection space, and the other end is communicated with the outside. The second gas flow meter (33) is installed on the second outlet pipe (32) to detect the gas flow of the second outlet pipe (32). The second gas flow meter (33) is connected to the intelligent control unit (5) and can send information to the intelligent control unit (5).

3. The hydraulic distributor detection device according to claim 2, characterized in that: The outer tube (21) has an axial cavity, and a telescopic tube unit (7) is installed in the cavity of the outer tube (21). The telescopic tube unit (7) includes an inner tube (71) and a second electric cylinder (72). The second electric cylinder (72) is fixedly installed in the cavity of the outer tube (21). The inner tube (71) is slidably installed in the cavity of the outer tube (21). The outer wall of the inner tube (71) is sealed to the inner wall of the outer tube (21). The telescopic shaft of the second electric cylinder (72) is fixedly connected to one end of the inner tube (71). The second electric cylinder (72) can push the inner tube (71) to extend and retract in the cavity of the outer tube (21). When the inner tube (71) extends, the outer wall of the inner tube (71) seals the first vent pipe (23) and the outer tube. When the inner tube (71) retracts, the inner tube (71) no longer seals the connection between the first vent pipe (23) and the outer tube (21). The inner tube (71) has an axial cavity. The third electric cylinder (41) is fixedly installed in the cavity of the inner tube (71). The ejector pin (43) is slidably installed in the cavity of the inner tube (71). The ejector pin (43) is sealed to the inner wall of the inner tube (71). The third electric cylinder (41) can push the ejector pin (43) to extend and retract in the cavity of the inner tube (71). The other end of the ejector pin (43) extends out from the other end of the inner tube (71). The intelligent control unit (5) is connected to the third electric cylinder (41) and can control the operation of the third electric cylinder (41).

4. The hydraulic distributor detection device according to claim 3, characterized in that: Also includes The workstation unit (8) includes a workstation body, a workstation groove (81), a distributor guide groove (82), a housing (83), and a first electric cylinder (84). The workstation groove (81) is set on the workstation body, and the depth of the workstation groove (81) is adapted to the thickness of the hydraulic distributor (6). The distributor guide groove (82) is set in the workstation groove (81), and the left and right widths of the distributor guide groove (82) are the same as the width of the hydraulic distributor (6). When the hydraulic distributor (6) is placed in the distributor guide groove (82), it can slide back and forth along the distributor guide groove (82). The hydraulic distributor air inlet interface (12) is installed on the front surface of the workstation groove (81). The housing (83) is slidably installed in the workstation groove (81). The liquid separation detection unit (2) is installed in the housing (83), and the oil... The pressure distributor outlet port (22) and the overflow port docking seat (44) are both located on the front surface of the housing (83). The first electric cylinder (84) is fixed at the rear end of the work station groove (81). The telescopic shaft of the first electric cylinder (84) is fixedly connected to the housing (83). The first electric cylinder (84) can drive the housing (83) to move back and forth. When the housing (83) moves forward, it can cooperate with the front surface of the work station groove (81) to clamp the hydraulic distributor (6). It can also make the hydraulic distributor inlet port (12) dock with the oil inlet (61) of the hydraulic distributor (6), the hydraulic distributor outlet port (22) dock with the oil outlet (62) of the hydraulic distributor (6), and the overflow port docking seat (44) dock with the outlet of the overflow valve (63). The intelligent control unit (5) is connected to the first electric cylinder (84) and can control the operation of the first electric cylinder (84).

5. The hydraulic distributor detection device according to claim 4, characterized in that: The work station groove (81) is provided with a front-to-back outer shell guide rail (85) on the left and right sides respectively. The outer shell (83) is fixed with sliders (86) on the left and right sides respectively. The sliders (86) are slidably mounted on the outer shell guide rail (85).

6. The hydraulic distributor detection device according to claim 5, characterized in that: The mating surfaces of the inlet port (12) of the hydraulic distributor and the inlet port (61) of the hydraulic distributor (6), the mating surfaces of the outlet port (22) of the hydraulic distributor and the outlet port (62) of the hydraulic distributor (6), and the mating surfaces of the overflow port docking seat (44) and the outlet of the overflow valve (63) are all provided with rubber layers. The side of the sealing ring (31) that abuts against the hydraulic distributor (6) is also provided with a rubber layer.

7. The hydraulic distributor detection device according to claim 6, characterized in that: The outer casing (83) is provided with a fixing frame (87). The outer tube (21), the first gas flow meter (24), the third gas flow meter (46) and the second gas flow meter (33) located at the outlet port (22) of the oil pressure distributor are all fixedly installed on the fixing frame (87). The outer casing (83) is provided with a vent (88).

8. The hydraulic distributor detection device according to claim 7, characterized in that: The hydraulic distributor (6) has an oil inlet (61) on its front side and several oil outlets (62) on its rear side. The hydraulic distributor (6) has the same number of overflow valves (63) as the number of oil outlets (62). The valve core of the overflow valve (63) is coaxially arranged with the oil outlet (62), and the inlet of the overflow valve (63) is directly facing the oil outlet (62). The pressure relief holes of each overflow valve (63) are connected to the same outlet, which is located on the rear side of the hydraulic distributor (6).

9. A method for testing a hydraulic distributor, characterized in that: The application of the hydraulic distributor detection device as described in any one of claims 1-8 specifically includes the following steps: S1. Clamping and docking steps: Place the hydraulic distributor (6) on the workstation unit (8), control the first electric cylinder (84) to push the outer shell (83) forward, so that the air inlet port (12) of the hydraulic distributor is docked with the oil inlet (61) of the hydraulic distributor (6), the air outlet port (22) of the hydraulic distributor is docked with the oil outlet (62) of the hydraulic distributor (6), and at the same time, the overflow port docking seat (44) is docked with the outlet of the overflow valve (63). S2, docking sealing test steps: Control the telescopic tube unit (7) of the liquid separation detection unit (2) to be in the extended state, so that the inner tube (71) closes the connection port between the first gas outlet pipe (23) and the outer tube (21); through the external gas source, gas is introduced into the oil pressure distributor (6) through the air inlet pipe (11) to ensure that the gas pressure is less than the overflow valve opening pressure; if the sealing of each interface is not qualified, the gas can enter the corresponding sealing test space through the gap between the interface and the oil inlet (61) or oil outlet (62) of the oil pressure distributor (6), thereby causing the second gas flow meter (33) to detect the change in value. The intelligent control unit (5) reads the value of each second gas flow meter (33) and judges whether the sealing at each docking interface is qualified; if it is not qualified, an alarm is triggered and the process is terminated. S3, Liquid distribution channel detection steps: Keep the air supply open, control the telescopic tube unit (7) of the liquid distribution detection unit (2) to be in the retracted state, so that the connection port between the first air outlet pipe (23) and the outer pipe (21) is opened; the intelligent control unit (5) reads the value of the first gas flow meter (24) of each liquid distribution detection unit (2) and judges whether the flow rate of each liquid distribution channel of the oil pressure distributor (6) is qualified; S4. Overflow valve testing steps: S4.1 Control the telescopic tube unit (7) to be in the extended state, so that the inner tube (71) closes the connection port between the first gas outlet tube (23) and the outer tube (21), and directs the gas to the overflow valve (63); S4.

2. While keeping the other third electric cylinders (41) from extending, the intelligent control unit (5) controls one of the third electric cylinders (41) to push the ejector pin (43) against the valve core of the corresponding overflow valve (63). During this process, the pressure value of the pressure sensor (42) is read in real time. When the third gas flow meter (46) detects a sudden increase in gas flow, the value of the pressure sensor (42) is recorded. This value is the opening pressure of the overflow valve (63). The intelligent control unit (5) determines whether the opening pressure of the overflow valve (63) is within the predetermined range. If it is, it is qualified; if it is not, it is unqualified. S4.3 Control the third electric cylinder (41) to continue advancing, so that the overflow valve (63) is in a fully open state. The intelligent control unit (5) reads the value of the third gas flow meter (46) and judges whether the flow or sealing performance of the overflow valve (63) in the fully open state is qualified. S4.4 Retract the third electric cylinder (41), and then the intelligent control unit (5) controls the second third electric cylinder (41) to push the ejector pin (43) against the valve core of the corresponding overflow valve (63), repeating steps S4.2 and S4.3 until all overflow valves (63) have been detected. S5. Result Judgment and Reset Steps: The intelligent control unit (5) integrates the detection data from steps S2, S3 and S4 to determine whether the hydraulic distributor (6) is qualified or not; then, it controls each electric cylinder to reset and removes the hydraulic distributor (6) under test.

10. A method for detecting a hydraulic distributor according to claim 9, characterized in that: in In steps S2 and S3, the gas pressure introduced into the oil pressure distributor (6) is set to the gas pressure value under the normal operating pressure of the oil pressure distributor (6).

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