Hydraulic valve assembly semi-automatic testing equipment

Abstract

The present application belongs to the technical field of mechanical test equipment, and specifically discloses a kind of hydraulic valve assembly semi-automatic test equipment, including test console, operating platform and valve body, the test console is arranged on the side above operating platform, the fixed seat is fixedly installed on the top of operating platform, the fixed seat is provided with inspection table in the top, the fixed seat is provided with limit block on the top of two sides respectively, the inspection table is fixed on the upper surface of fixed seat by the positioning bolt at each corner, the oil pipe is symmetrically installed in the inside of two sides of the inspection table, the oil pipe of same side is provided with external oil inlet piece at one end, the upper end of four oil pipes is connected with upper extension pipe by telescopic pipe, the upper surface of inspection table is provided with the slot hole corresponding to four upper extension pipes, the present application can select single or multiple oil circuit independently according to the test requirement and extend, realize flexible test of multiple modes, effectively improve the versatility of detection equipment, test flexibility and high-pressure sealing reliability.

Description

Technical Field

[0001] This invention belongs to the technical field of mechanical testing equipment, and specifically discloses a semi-automatic testing device for hydraulic valve assembly. Background Technology

[0002] In the factory performance testing of hydraulic valves (such as multi-way directional valves and proportional directional valves), the valve body to be tested needs to be fixed on a special testing platform, and high-pressure oil is supplied to multiple working oil ports such as P, T, A, and B at the bottom of the valve body through the testing platform to simulate its actual working conditions, thereby testing its pressure resistance, internal leakage and directional action characteristics.

[0003] Currently, the oil port connection and sealing structure of existing testing stations mostly adopt the following method: sealing grooves are opened at the positions corresponding to the oil ports of the valve body on the end face of the testing station, O-rings are embedded in the grooves, and then the valve body to be tested is forcibly pressed onto the testing station surface by bolts or hydraulic clamping mechanism, and high-pressure sealing of each oil port is achieved by relying on the elastic compression deformation of the sealing rings.

[0004] However, the above-mentioned rigid compression sealing method has the following technical drawbacks in practical applications: Firstly, due to limitations in the hydraulic valve casting process and subsequent machining precision, the sealing end faces around the oil ports at the bottom of the valve body cannot guarantee absolute flatness, typically exhibiting millimeter-level machining flatness errors. Furthermore, there are parallelism deviations between the end faces of each oil port. When a rigid clamping method is used, the actual clamping force at each oil port is severely unevenly distributed. At relatively high positions on the oil port end faces, the sealing ring is over-compressed, easily leading to permanent deformation or even being squeezed out of the sealing groove and damaged, directly resulting in a significant reduction in the sealing ring's service life. Conversely, at relatively low positions on the oil port end faces, the compression of the sealing ring is severely insufficient, failing to form an effective seal. Under high-pressure (above 20MPa) testing conditions, high-pressure oil is highly prone to jetting leakage from these points, not only affecting the accuracy of test results but also posing a serious threat to the personal safety of operators.

[0005] Secondly, existing testing devices suffer from a single hydraulic circuit drive mode, lacking flexible selective control capabilities. Specifically, most current equipment only supports a "full hydraulic circuit overall test" mode that simultaneously lifts and presses all hydraulic circuit interfaces. When the testing process only requires independent testing of a specific port (e.g., performing a pressure test only on port P, or performing a response pairing test only on ports A and B), existing equipment cannot selectively drive only a single or a few specified hydraulic circuits to extend and connect according to testing requirements. Other unrelated hydraulic circuits still have to endure unnecessary pressing and supply pressure. This not only causes additional unnecessary fatigue wear on the seals of unrelated hydraulic circuits, accelerating the aging of the overall sealing system, but also makes the testing process inflexible, unable to adapt to diverse and sophisticated hydraulic valve testing needs, thus limiting the versatility and efficiency of the testing equipment.

[0006] In summary, the existing oil port sealing technology of hydraulic valve testing benches has significant shortcomings in terms of sealing reliability, testing mode flexibility, and impurity adaptability, and a more comprehensive solution is urgently needed. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the background art, and to propose a semi-automatic testing device for hydraulic valve assembly, including a test control console, an operating table, and a valve body. The test control console is located above one side of the operating table, and a fixed base is fixedly installed above the operating table. An inspection platform is set inside the fixed base. Limit blocks are respectively set on both sides above the fixed base. The inspection platform is fixed to the upper surface of the fixed base by positioning bolts at each corner. Oil pipes are symmetrically installed on both sides inside the inspection platform. One end of each of the two oil pipes on the same side is provided with an external oil inlet. The upper ends of the four oil pipes are connected to upper extension pipes through telescopic tubes. The upper surface of the inspection platform has four corresponding upper extension pipes. A main control cylinder is located inside the inspection table and in the area between the four oil pipes. A flow-dividing pneumatic assembly is located inside the main control cylinder and on one side corresponding to each oil pipe. The main control cylinder is connected to a support column via a locking assembly on its upper surface. A cross rod is fixedly installed at the upper end of the support column. The four L-shaped branches of the cross rod are respectively fixedly connected to fixed shells. The four fixed shells are respectively fixedly sleeved on the upper outside of the corresponding oil pipe. The four fixed shells are all sleeved with the upper extension pipe through an internal sliding locking assembly. One end of each flow-dividing pneumatic assembly can drive the upper extension pipe to extend into the corresponding slot above the inspection table, thereby selecting to dock and seal with the corresponding oil port at the bottom of the valve body to be tested.

[0008] This invention allows for the selective driving of any one, two, or more upper extension tubes to extend from the through slot, according to actual testing needs, to connect and seal with the corresponding oil port at the bottom of the hydraulic valve under test. This enables a single device to simultaneously cover various working conditions, including single-port independent pressure resistance testing, dual-port differential pairing testing, and comprehensive performance testing of all ports, significantly improving the versatility and testing flexibility of the testing equipment. Simultaneously, non-working oil circuits are not subjected to unnecessary clamping force, effectively extending the overall service life of the seals.

[0009] In the above scheme, the valve body is a four-way hydraulic valve, and the bottom of the valve body is provided with an oil port corresponding to the oil inlet of the upper extension pipe. A quick clamping mechanism for the valve body is provided above the operating table, which can be clamped from the top of the valve body to counteract the thrust of the high-pressure oil.

[0010] In the above scheme, the external oil inlet includes a double-pass oil pipe, each of which is equipped with a solenoid valve on one side, and one end of the double-pass oil pipe is connected to an external flange pipe through a pipe interface. Both ends of the double-pass oil pipe are respectively connected to the interior of two oil pipes on the same side.

[0011] In the above scheme, the flow splitting pneumatic assembly further includes a flow splitter and a shut-off valve. One end of the flow splitter is connected to the main control cylinder, and a shut-off valve is installed on the outside of the flow splitter. An air cylinder is connected to the end of the flow splitter away from the main control cylinder, and a telescopic rod is slidably connected to the inside of the air cylinder.

[0012] In the above scheme, the sliding clamping assembly further includes two sliding rods, the upper ends of the two sliding rods are connected to a housing, the housing has an upwardly extending sleeve adapted to clamp the extension tube, the housing has a drainage component inside and near the cross rod axis, the two sliding rods are arranged diagonally opposite each other, one end of the two sliding rods slides through the inside of the fixed housing, the lower ends of the two sliding rods are connected to an arc-shaped rod, the upper end of the telescopic rod is connected to the bottom of the arc-shaped rod, and an O-ring is embedded in the upper end face of the upper extension tube.

[0013] In the above scheme, the positioning component further includes a disc body, which is fixedly installed on the upper end of the cross rod. A liquid storage chamber is provided inside the upper part of the disc body. The inner edge of the liquid storage chamber is processed into a guide slope. A suction connecting pipe is connected to one end of the disc body, and the end of the suction connecting pipe away from the disc body extends to the outside of the inspection table.

[0014] In the above scheme, the arc-shaped rod is further fixedly connected to the outside of the connecting rod, and the outer surface of the support column is provided with a sliding groove adapted to the vertical sliding of the connecting rod.

[0015] In the above scheme, the drainage component further includes a V-shaped guide spout, which is obliquely installed on one side inside the casing, with the lower end of the V-shaped guide spout facing the liquid storage cavity inside the disc.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention achieves independent drive control of the extension and retraction of each upper extension tube by setting a flow-dividing pneumatic component corresponding to each of the four oil pipes in the main control cylinder. Compared with the existing technology, which only has a single mode of synchronous testing of the entire oil circuit, this invention can selectively drive any one, two, or more upper extension tubes to extend from the slots on the surface of the test bench according to actual testing needs, and connect and seal with the corresponding oil port at the bottom of the valve body under test. This allows a single device to simultaneously cover multiple working conditions such as single-port independent pressure resistance testing, dual-port differential pairing testing, and full-port comprehensive performance testing, greatly improving the versatility and testing flexibility of the testing equipment. At the same time, the non-working oil circuit does not need to bear unnecessary compression and oil supply pressure, effectively avoiding additional fatigue wear of unrelated seals, extending the service life of the overall sealing system, and solving the technical problem that existing equipment cannot meet the needs of refined testing due to its single drive mode.

[0017] 2. This invention adopts a floating telescopic structure that combines oil pipes, telescopic pipes, and upper extension pipes. Each upper extension pipe can extend by different displacements according to the actual height of the corresponding oil port end face under the independent drive of the diversion pneumatic component. This automatically compensates for the flatness error and parallelism deviation of each oil port end face at the bottom of the valve body due to processing accuracy limitations, ensuring that each docking oil port can obtain a uniform and appropriate sealing pressure. This effectively overcomes the problem of excessive compression damage to the sealing ring or insufficient compression causing high pressure leakage in the existing rigid compression method, which is caused by uneven force. It significantly improves the sealing reliability and operational safety under high pressure test conditions.

[0018] 3. This invention, through a stable frame structure of crossbar, support column, and fixed shell, combined with a sliding clamping assembly, ensures that each upper extension tube moves only axially during extension and retraction, avoiding jamming or uneven wear of the sealing ring due to off-center loading. This guarantees the stability and repeatability of the equipment under long-term, high-frequency use. Operators only need to issue commands through the control panel of the test console, and the pneumatic component will automatically complete the selective extension and docking of each oil circuit without manual disassembly of pipelines or replacement of interface plates. Combined with the positioning and fixing structure of the limit block and positioning bolt, it enables rapid clamping and positioning of the valve body and automatic docking of the oil circuit, significantly simplifying the operation process, shortening test preparation time, and effectively improving the overall efficiency of batch factory testing of hydraulic valves. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a semi-automatic testing device for hydraulic valve assembly provided by the present invention; Figure 2 This invention provides a schematic diagram of the disassembled structure between the mounting base and the valve body of a semi-automatic hydraulic valve assembly testing device. Figure 3 A schematic diagram showing the connection structure between the inner side of the inspection table and the oil pipe of a semi-automatic testing device for hydraulic valve assembly provided by the present invention. Figure 4 A schematic diagram of the connection structure between the oil pipe and the upper extension pipe of a semi-automatic hydraulic valve assembly testing device provided by the present invention; Figure 5 A schematic diagram of the connection structure between the fixed shell and the sliding clamping assembly of a semi-automatic hydraulic valve assembly testing device provided by the present invention; Figure 6 A schematic diagram of the connection structure of the sliding clamping component of a semi-automatic testing device for hydraulic valve assembly provided by the present invention; Figure 7 This invention provides a schematic diagram of the partial connection structure between the connecting rod and the support column of a semi-automatic testing device for hydraulic valve assembly.

[0020] In the diagram: 1. Test control console; 2. Operating table; 3. Fixed base; 4. Valve body; 5. Double-pass oil pipe; 6. Inspection table; 7. Suction connection pipe; 8. Oil pipe; 9. Upper extension pipe; 10. Sleeve; 11. Cross rod; 12. Telescopic pipe; 13. Slide rod; 14. Main control cylinder; 15. Fixed shell; 16. V-shaped guide nozzle; 17. Air cylinder; 18. Arc rod; 19. Diverter; 20. Shut-off valve; 21. Disc; 22. Support column; 23. Slide groove; 24. Connecting rod; 25. O-ring; 26. Jacket; 27. Limiting block; 28. Telescopic rod; 29. ​​Positioning bolt; 30. Guide ramp. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0023] like Figures 1-7The diagram illustrates a semi-automatic testing device for hydraulic valve assembly, comprising a test control console 1, an operating platform 2, and a valve body 4. The test control console 1 is positioned above one side of the operating platform 2, and its outer surface is equipped with pressure sensors, airtightness sensors, and a control panel. The pressure sensors monitor the oil pressure in each oil circuit in real time, the airtightness sensors perform a pre-test for the airtightness of the sealing cavity before oil flow, and the control panel allows operators to input test mode commands and displays the feedback data from each sensor in real time. The test control console 1 contains a programmable logic controller (PLC), which is electrically or signal-connected to the pressure sensors, airtightness sensors, control panel, main control cylinder 14, and each solenoid valve. The PLC receives sensor feedback signals and issues control commands to each actuator.

[0024] A fixed base 3 is fixedly installed above the operating table 2. An inspection table 6 is set inside the fixed base 3. Limiting blocks 27 are set on both sides of the fixed base 3. The limiting blocks 27 are used to initially limit the horizontal position of the valve body 4 to be tested when it is placed on the upper surface of the inspection table 6, so as to ensure that each oil port at the bottom of the valve body 4 is aligned with each slot on the upper surface of the inspection table 6. The inspection table 6 is fixed to the upper surface of the fixed base 3 by positioning bolts 29 at each corner, so as to ensure that the inspection table 6 remains stable and does not loosen during operation.

[0025] The inspection table 6 has symmetrically installed oil pipes 8 on both sides inside. Each of the two oil pipes 8 on the same side has an external oil inlet at one end. The upper ends of all four oil pipes 8 are connected to upper extension pipes 9 via telescopic pipes 12. The telescopic pipes 12 are preferably flexible hoses or sliding sleeves, which provide displacement compensation for the axial extension and retraction of the upper extension pipes 9 while the oil pipes 8 remain fixed. The upper surface of the inspection table 6 has slots corresponding to the four upper extension pipes 9. A main control cylinder 14 is located inside the inspection table 6, in the area between the four oil pipes 8. The main control cylinder 14 has a slot on one side corresponding to each oil pipe 8. Equipped with a flow-dividing pneumatic assembly, the main control cylinder 14 is connected to a support column 22 via a locking assembly on its upper surface. A cross rod 11 is fixedly installed on the upper end of the support column 22. The four L-shaped branches of the cross rod 11 are respectively fixedly connected to fixed housings 15. The four fixed housings 15 are respectively fixedly sleeved on the upper outside of the corresponding oil pipes 8. The four fixed housings 15 are all sleeved with the upper extension pipe 9 through an internal sliding locking assembly. One end of each flow-dividing pneumatic assembly can drive the upper extension pipe 9 to extend into the corresponding slot above the inspection table 6, thereby selecting to dock and seal with the corresponding oil port at the bottom of the valve body 4 to be tested.

[0026] The main control cylinder 14 is a pneumatically controlled cylinder. The main control cylinder 14 is supplied with compressed air through an external air source, and the air intake and exhaust of each independent air chamber are controlled by the PLC in the test control console 1.

[0027] Specifically, the operator first selects the corresponding test mode based on the valve body 4 under test. When a single-port independent withstand pressure test is required, the operator selects the single-port test mode through the control panel of the test console 1 and specifies the target port, such as port P. After receiving the instruction, the PLC supplies air only to the independent air chamber corresponding to one oil circuit in the main control cylinder 14, driving the corresponding split pneumatic component to move, so that the corresponding upper extension tube 9 extends out from the slot on the upper surface of the test bench 6, while the other three upper extension tubes 9 remain retracted. Subsequently, high-pressure oil is sent into the single oil port of the valve body 4 only through the extended upper extension tube 9, completing the single-port independent test. When a full-port comprehensive test is required, the operator selects the full-port test mode, and the PLC simultaneously supplies air to the four independent air chambers in the main control cylinder 14, driving the four split pneumatic components to move synchronously, and the four upper extension tubes 9 extend simultaneously and connect to the four oil ports at the bottom of the valve body 4 respectively, achieving synchronous pressure supply for the entire oil circuit.

[0028] It should be noted that the fixed housing 15 is fixedly sleeved on the outside of the oil pipe 8, while the upper extension pipe 9 is slidably fitted relative to the fixed housing 15. Therefore, the inner diameter of the fixed housing 15 should be larger than the outer diameter of the upper extension pipe 9, and a sliding seal, such as a sealing ring, should be provided between the two to prevent high-pressure oil from leaking along the fitting gap. In addition, the air supply lines of the four split pneumatic components should be independent of each other to avoid air pressure fluctuations in one oil line extension action affecting the stability of other oil lines.

[0029] The valve body 4 is a four-way hydraulic valve, and the bottom of the valve body 4 is provided with an oil port corresponding to the oil inlet of the upper extension pipe 9.

[0030] In this embodiment, during testing, it is necessary to ensure that the position distribution of each slot on the upper surface of the inspection table 6 and the diameter of the upper extension pipe 9 correspond one-to-one with the oil port at the bottom of the valve body 4. If the oil port distribution of the valve body 4 under test changes, it can be adapted by replacing it with an inspection table 6 of different specifications. The setting position of the limit block 27 should be adjusted according to the external dimensions of the valve body 4.

[0031] It is particularly important to emphasize that for valve bodies 4 with different pipe diameters, the diameter of the upper extension tube 9 and the size of the O-ring 25 should be adjusted accordingly to ensure that the sealing ring can form an effective initial sealing pressure after compression. At the same time, the valve body 4 should be placed gently to avoid a rigid collision between the bottom end face of the valve body 4 and the upper end face of the upper extension tube 9, which could damage the O-ring 25 or scratch the bottom sealing surface of the valve body 4.

[0032] The external oil inlet includes a double-pass oil pipe 5. A solenoid valve is installed on one side of the double-pass oil pipe 5, and one end of the double-pass oil pipe 5 is connected to an external flange pipe through a pipe interface. Both ends of the double-pass oil pipe 5 are respectively connected to the interior of two oil pipes 8 on the same side.

[0033] In this embodiment, the solenoid valve is a two-position two-way solenoid directional valve, and the switching of its valve core is controlled by the PLC in the test control console 1. When the solenoid valve is energized, the valve core moves to the open position, the internal channel of the double-way oil pipe 5 is opened, and external high-pressure oil can enter the two oil pipes 8 on the same side through the double-way oil pipe 5; when the solenoid valve is de-energized, the valve core returns to the closed position under the action of the return spring, the internal channel of the double-way oil pipe 5 is cut off, preventing high-pressure oil from entering, and the external flange pipe is used to connect to the oil supply line of the external hydraulic pump station. It is fixedly connected to the flange of the external oil supply line by bolts to ensure that there is no leakage at the connection under high pressure.

[0034] The split pneumatic assembly includes a splitter 19 and a shut-off valve 20. One end of the splitter 19 is connected to the main control cylinder 14. The shut-off valve 20 is installed on the outside of the splitter 19. The shut-off valve 20 is a manual or electromagnetic shut-off valve, which is used to independently cut off the air supply of the split pneumatic assembly during maintenance or debugging, so as to facilitate maintenance of a single pneumatic assembly without affecting the normal operation of other oil circuits. The end of the splitter 19 away from the main control cylinder 14 is connected to an air cylinder 17. A telescopic rod 28 is slidably connected to the upper part of the air cylinder 17.

[0035] In this embodiment, the air inlet of the distributor 19 is connected to the air outlet of the corresponding independent air chamber in the main control cylinder 14 through an air pipe. The distributor 19 is provided with an airflow distribution channel to guide the compressed air output by the main control cylinder 14 to the corresponding air cylinder 17. The air cylinder 17 is a vertically arranged cylindrical structure. A throttle valve can be added to the air cylinder 17. The lower end of the telescopic rod 28 is provided with a piston head that slides with the inner wall of the air cylinder 17. A Y-shaped or O-shaped sealing ring is embedded on the piston head to ensure that the compressed air does not leak along the gap between the piston head and the inner wall of the air cylinder 17.

[0036] Specifically, when the PLC supplies air to the independent air chamber corresponding to a certain oil circuit in the main control cylinder 14, the compressed air enters the corresponding air cylinder 17 through the distributor 19, pushing the piston head and telescopic rod 28 inside the air cylinder 17 to move upward. The upper end of the telescopic rod 28 pushes the arc-shaped rod 18 and the sliding rod 13 to slide upward, thereby driving the upper extension tube 9 to extend. The extension speed of the telescopic rod 28 is adjusted by the throttle valve at the air inlet of the air cylinder 17. When the test is completed and a reset is required, the PLC controls the main control cylinder 14 to switch the air circuit, so that the compressed air in the air cylinder 17 is discharged into the atmosphere through the distributor 19 and the exhaust port of the main control cylinder 14. The telescopic rod 28 falls back to reset under the gravity of the arc-shaped rod 18, the sliding rod 13, the sleeve 10, and the upper extension tube 9, completing the retraction action of the upper extension tube 9.

[0037] It should be emphasized that the air cylinder 17 can adopt a cylinder structure, and the corresponding telescopic movement can be completed by switching the air circuit of the main control cylinder 14. Since this is existing technology, it will not be described in detail.

[0038] The sliding mounting assembly includes two slide rods 13, the upper ends of which are connected to a housing 10. Inside the housing 10, a clip 26 extends upward to fit and mount the extension tube 9. Inside the housing 10, near the axis of the cross rod 11, a drain is provided. The two slide rods 13 are arranged diagonally. One end of the two slide rods 13 slides through the inside of the fixed housing 15. The lower ends of the two slide rods 13 are connected to an arc rod 18. The upper end of the telescopic rod 28 is connected to the bottom of the arc rod 18. An O-ring 25 is embedded in the upper end face of the upper extension tube 9.

[0039] In this embodiment, when the telescopic rod 28 extends upward, it pushes the arc-shaped rod 18 to transmit power to the two sliding rods 13. Since the two sliding rods 13 are arranged diagonally opposite each other, their action on the housing 10 effectively prevents the housing 10 from becoming horizontally skewed during its ascent, ensuring that the upper extension tube 9 rises linearly in the vertical direction without radial swaying. The fixed housing 15 has guide holes inside for the two sliding rods 13 to pass through. Wear-resistant copper bushings or linear bearings are embedded in the inner wall of the guide holes to reduce frictional resistance during the sliding of the sliding rods 13 and improve guiding accuracy. The O-ring 25 is compressed upon initial contact with the bottom end face of the valve body 4. During testing, this ensures an initial sealing effect while avoiding excessive compression that could lead to premature fatigue damage of the sealing ring.

[0040] The positioning assembly includes a disc body 21, which is fixedly installed on the upper end of the cross rod 11. A liquid storage chamber is provided inside the upper part of the disc body 21. The inner edge of the liquid storage chamber is machined into a guide slope 30. This liquid storage chamber is an oil collection space formed by the recess inside the disc body 21, which is used to temporarily store residual oil dripping from the upper extension pipe 9, the bottom end face of the valve body 4, or the inside of the casing 10. The guide slope 30 slopes from the periphery of the liquid storage chamber to the bottom center of the liquid storage chamber, so as to facilitate the oil dripping into the liquid storage chamber to the lowest point of the bottom of the liquid storage chamber. A suction connection pipe 7 is connected to one end of the disc body 21. The end of the suction connection pipe 7 away from the disc body 21 extends to the outside of the inspection table 6.

[0041] In this embodiment, during the extension and retraction of the upper extension tube 9 during docking or disengagement, test oil residue may remain on the bottom surface of the valve body 4 or the end surface of the upper extension tube 9, causing dripping or leakage. This residual oil flows downwards along the outer wall of the upper extension tube 9 under gravity to the housing 10, and then drips downwards through the inside of the housing 10 into the storage chamber of the disc 21. After dripping into the storage chamber, the oil automatically converges to the lowest point at the bottom of the storage chamber under the guidance of the guide slope 30, and is finally pumped out to the outside of the inspection table 6 via the suction connection pipe 7. The suction power of the suction connection pipe 7 can be derived from an externally installed miniature vacuum pump.

[0042] It is worth emphasizing that a liquid level sensor can be installed at position 21 on the plate to make the oil draining process more accurate, or to drain the oil after multiple tests.

[0043] The arc-shaped rod 18 is externally fixedly connected to a connecting rod 24, and the outer surface of the support column 22 is provided with a sliding groove 23 adapted to the vertical sliding of the connecting rod 24.

[0044] In this embodiment, when the telescopic rod 28 pushes the arc-shaped rod 18 upward or downward, the arc-shaped rod 18 drives the connecting rod 24 to move synchronously, and the end of the connecting rod 24 slides vertically within the slide groove 23. The slide groove 23 provides horizontal constraint on the movement of the connecting rod 24, preventing the arc-shaped rod 18 from circumferentially deflecting or swaying around the axis of the support column 22 during movement, thereby ensuring that the two slide rods 13 and the sleeve 10 always move in a straight line in the vertical direction.

[0045] The drainage component includes a V-shaped guide spout 16, which is a V-shaped inclined guide channel component. The V-shaped guide spout 16 is installed obliquely inside the housing 10 on one side, with the lower end of the V-shaped guide spout 16 facing the liquid storage cavity inside the disc 21.

[0046] In this embodiment, residual oil dripping from the outer wall of the upper extension pipe 9 or the bottom end face of the valve body 4 will fall into the interior of the housing 10 and the upper extension pipe 9. The oil falling into the area of ​​the housing 10 is then received by the upper opening of the V-shaped guide spout 16. Since the V-shaped guide spout 16 has a V-shaped cross-section, the oil gathers at the bottom of the V-shaped groove to form a liquid flow, which flows downward along the inclined V-shaped groove wall, and finally drips from the lower end of the V-shaped guide spout 16 into the liquid storage cavity of the disc 21, completing the directional flow from the interior of the housing 10 to the liquid storage cavity, while some of the oil flowing into the upper extension pipe 9 can be returned.

[0047] Working principle: First, the operator places the valve body 4 to be tested on the upper surface of the inspection table 6. The inspection table 6 is fixed to the upper surface of the fixed seat 3 by the positioning bolts 29 at each corner. The limiting blocks 27 on both sides of the upper part of the fixed seat 3 limit the installation position of the valve body 4 to be tested, ensuring that each oil port at the bottom of the valve body 4 is aligned with each slot on the upper surface of the inspection table 6, thus completing the initial positioning and clamping of the valve body 4.

[0048] After positioning is completed, the operator starts the test through the control panel on the outer surface of the test console 1 according to the current test process requirements. The test console 1 controls the main control cylinder 14 to start according to the command. The main control cylinder 14 is equipped with a flow-dividing pneumatic component corresponding to each of the four oil pipes 8. Each flow-dividing pneumatic component works independently. When the single-port independent pressure withstand test mode is selected, only one designated flow-dividing pneumatic component needs to be driven. The pneumatic pressure output by the main control cylinder 14 enters the corresponding air cylinder 17 through the corresponding flow divider 19 and shut-off valve 20, pushing the telescopic rod 28, which is sealed and slidably connected inside the air cylinder 17, to extend upward. When the dual-port or full-port test mode is selected, two or all flow-dividing pneumatic components are driven to operate simultaneously. Each telescopic rod 28 extends. When each telescopic rod 28 extends, its upper end pushes the corresponding arc rod 18 to move upward. The connecting rod 24, which is fixedly connected to the outside of the arc rod 18, slides vertically along the groove 23 opened on the outer surface of the support column 22, which plays a guiding and stabilizing role. The upward movement of the arc-shaped rod 18 drives two diagonally arranged sliding rods 13 to slide upward synchronously. The upper ends of the two sliding rods 13 are connected to the housing 10. The sliding rods 13 slide through the interior of the fixed housing 15, which is fixedly fitted above the outside of the oil pipe 8, providing guidance and constraint for the sliding of the sliding rods 13. When the housing 10 moves upward, the jacket 26 extending from its interior drives the upper extension tube 9 to move upward synchronously. The upper extension tube 9 slides upward along the sliding clamping assembly inside the fixed housing 15, and its upper end extends out from the corresponding slot on the upper surface of the inspection table 6 until the O-ring 25 embedded on the upper end face of the upper extension tube 9 is tightly fitted to the corresponding oil port end face at the bottom of the valve body 4, completing the docking and sealing of the oil circuit. During this process, the oil pipe 8 and the upper extension tube 9 achieve relative telescopic movement through the telescopic tube 12. The telescopic tube 12 provides axial displacement compensation for the extension of the upper extension tube 9 when the oil pipe 8 is fixed. The valve body 4 is fixed above the inspection table 6 by an external hydraulic clamping mechanism.

[0049] After the oil circuit is sealed, the external oil supply line enters the oil pipe 8 through the double-port oil pipe 5. The solenoid valve inside the double-port oil pipe 5 controls the opening and closing of the oil circuit. High-pressure oil enters the upper extension pipe 9 through the oil pipe 8 and the telescopic pipe 12, and then is sent to the corresponding oil port at the bottom of the valve body 4 for pressure resistance and internal leakage testing. During the test, the pressure sensor and airtightness sensor on the outer surface of the test control console 1 collect the pressure data and sealing data of each oil circuit in real time and feed them back to the control panel. For irrelevant oil circuits that are not selected for testing, the corresponding flow splitting pneumatic components do not operate, and their upper extension pipes 9 remain retracted inside the test bench 6, not participating in compression and oil supply, to avoid unnecessary wear on the seals.

[0050] After the test is completed, the valve body 4 is left to stand for a period of time and then removed. All components return to their initial positions. Since the oil port at the bottom of the valve body 4 is open, oil will seep onto the surface of the inspection table 6 and near the fixed upper extension pipe 9. During the extension and retraction of the upper extension pipe 9, the oil may flow down from the slot. The oil can be guided downwards along the V-shaped guide spout 16 installed at an inclination on one side of the casing 10 to the liquid storage chamber inside the disc 21. The guide slope 30 processed on the inner edge of the liquid storage chamber will collect the oil at the bottom of the liquid storage chamber. The suction connection pipe 7 connected to one end inside the disc 21 will pump the accumulated oil outwards to the outside of the inspection table 6 to prevent the oil from accumulating inside the equipment.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A semi-automatic testing device for hydraulic valve assembly, comprising a test control console (1), an operating table (2), and a valve body (4), characterized in that, The test control console (1) is located above one side of the operating table (2). A fixed base (3) is fixedly installed above the operating table (2). An inspection table (6) is set inside the fixed base (3). Limiting blocks (27) are set on both sides above the fixed base (3). The inspection table (6) is fixed to the upper surface of the fixed base (3) by positioning bolts (29) at each corner. Oil pipes (8) are symmetrically installed on both sides inside the inspection table (6). One end of each of the two oil pipes (8) on the same side is provided with an external oil inlet. The upper ends of the four oil pipes (8) are connected to upper extension pipes (9) through telescopic pipes (12). The upper surface of the inspection table (6) is provided with slots corresponding to the four upper extension pipes (9). The area inside the inspection table (6) and located between the four oil pipes (8) is provided with There is a main control cylinder (14). Inside the main control cylinder (14) and on one side of each oil pipe (8), there is a flow-dividing pneumatic assembly. The main control cylinder (14) is connected to a support column (22) through a locking assembly on the upper surface. A cross rod (11) is fixedly installed on the upper end of the support column (22). The four L-shaped branches of the cross rod (11) are respectively fixedly connected to a fixing shell (15). The four fixing shells (15) are respectively fixedly sleeved on the upper outside of the corresponding oil pipe (8). The four fixing shells (15) are all sleeved with the upper extension pipe (9) through the internal sliding locking assembly. One end of each flow-dividing pneumatic assembly can drive the upper extension pipe (9) to extend into the corresponding slot above the inspection table (6), so as to select and connect with the corresponding oil port at the bottom of the valve body (4) to be tested for sealing.

2. The semi-automatic testing equipment for hydraulic valve assembly according to claim 1, characterized in that, The valve body (4) is a four-way hydraulic valve, and the bottom of the valve body (4) is provided with an oil port corresponding to the oil inlet of the upper extension pipe (9).

3. The semi-automatic testing equipment for hydraulic valve assembly according to claim 1, characterized in that, The external oil inlet includes a double-pass oil pipe (5). A solenoid valve is provided on one side of the double-pass oil pipe (5), and one end of the double-pass oil pipe (5) is connected to an external flange pipe through a pipe interface. The two ends of the double-pass oil pipe (5) are respectively connected to the interior of two oil pipes (8) on the same side.

4. The semi-automatic testing equipment for hydraulic valve assembly according to claim 1, characterized in that, The flow splitting pneumatic assembly includes a flow splitter (19) and a shut-off valve (20). One end of the flow splitter (19) is connected to the main control cylinder (14). The shut-off valve (20) is installed on the outside of the flow splitter (19). An air cylinder (17) is connected to the end of the flow splitter (19) away from the main control cylinder (14). A telescopic rod (28) is slidably connected to the inside of the air cylinder (17).

5. A semi-automatic testing device for hydraulic valve assembly according to claim 4, characterized in that, The sliding mounting assembly includes two sliding rods (13), the upper ends of the two sliding rods (13) are connected to a housing (10), the housing (10) extends upward from the inside to accommodate the upper extension tube (9), a drain is provided inside the housing (10) near the axis of the cross rod (11), the two sliding rods (13) are arranged diagonally, one end of the two sliding rods (13) slides through the inside of the fixed shell (15), the lower ends of the two sliding rods (13) are connected to an arc rod (18), the upper end of the telescopic rod (28) is connected to the bottom of the arc rod (18), and an O-ring (25) is embedded on the upper end face of the upper extension tube (9).

6. The semi-automatic testing equipment for hydraulic valve assembly according to claim 1, characterized in that, The positioning assembly includes a disc (21), which is fixedly installed on the upper end of the cross bar (11). A liquid storage chamber is provided inside the upper part of the disc (21), and the inner edge of the liquid storage chamber is processed into a guide slope (30). A suction connecting pipe (7) is connected to one end of the disc (21), and the end of the suction connecting pipe (7) away from the disc (21) extends to the outside of the inspection table (6).

7. A semi-automatic testing device for hydraulic valve assembly according to claim 5, characterized in that, The arc-shaped rod (18) is fixedly connected to a connecting rod (24), and the outer surface of the support column (22) is provided with a sliding groove (23) adapted to the vertical sliding of the connecting rod (24).

8. A semi-automatic testing device for hydraulic valve assembly according to claim 5, characterized in that, The drainage component includes a V-shaped guide spout (16), which is installed obliquely on one side inside the housing (10), with the lower end of the V-shaped guide spout (16) facing the liquid storage chamber inside the disc (21).

Images