Hydraulic cylinder sectional pressure testing equipment

Abstract

The utility model relates to a kind of hydraulic cylinder sectional pressure test equipment, belong to hydraulic test equipment.The utility model adopts technical scheme: including hydraulic station, drive hydraulic cylinder, rectangular frame and movable baffle, rectangular frame is frame structure, middle is equipped with long-groove hydraulic cylinder installation groove, both sides are equipped with the recessed sliding slot, the movable baffle is in installation hydraulic cylinder installation groove, the movable baffle both sides are equipped with moving block, the partial structure of movable baffle is in sliding slot, screw hole is opened on moving block, fixed bolt is set in screw hole, fixed bolt is arranged in screw hole and is fixed fixed block in sliding slot by toping;The cylinder body end fixed hole of the hydraulic cylinder to be tested is connected with the through hole on connecting lug through pin shaft coaxially, the liquid inlet hole of the hydraulic cylinder is connected with hydraulic station through hydraulic rubber tube, the piston rod end of the hydraulic cylinder is against movable baffle. Different length sectional pressure test can be carried out, the pressure change, deformation condition and the performance of bearing capacity of jack in each stage are analyzed.

Description

Technical Field

[0001] This utility model relates to a hydraulic cylinder segmented pressure testing device, which belongs to the category of hydraulic testing equipment. Background Technology

[0002] In underground coal mine operations, jacks serve as crucial equipment supports and adjustment tools, making their performance and reliability paramount. However, the traditional pressure testing method involves testing all types of jacks throughout their entire length, a method with serious drawbacks. Due to the complex and diverse working conditions at underground faces, the required length of jacks varies, and full-length pressure testing cannot simulate the working conditions of jacks at different lengths, thus failing to accurately test their load-bearing capacity at actual operating lengths. This frequently leads to insufficient load-bearing capacity in sections of jacks during practical applications, severely impacting the safety and production efficiency of underground operations, and potentially even causing safety accidents.

[0003] Current hydraulic jack pressure testing equipment only targets pressure testing along its full length, lacking segmented pressure testing equipment to test the pressure on the hydraulic jack when it extends to different lengths. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a hydraulic cylinder segmented pressure testing device, which solves the problem of testing the pressure conditions of hydraulic cylinders under different extension lengths.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model relates to a segmented hydraulic cylinder pressure testing device. The cylinder body of the hydraulic cylinder to be tested has a fixing hole at its end. The device includes a hydraulic station, a drive hydraulic cylinder, a rectangular frame, and a movable baffle. The rectangular frame is a metal welded frame structure with a long groove-shaped hydraulic cylinder mounting slot in the middle and concave sliding grooves on both sides. The movable baffle is located in the hydraulic cylinder mounting slot. Movable blocks are provided on both sides of the movable baffle. Part of the movable baffle is located in the sliding groove. The movable block has screw holes, and fixing bolts are installed in the screw holes. The fixing bolts pass through the screw holes and push against the sliding groove to fix the fixing blocks. A connecting lug is provided at the middle of one end of the hydraulic cylinder mounting slot. The cylinder end fixing hole of the hydraulic cylinder to be tested is coaxially connected to the through hole on the connecting lug through a pin. The hydraulic cylinder inlet is connected to the hydraulic station through a hydraulic hose. The piston rod end of the hydraulic cylinder abuts against the moving baffle.

[0006] The hydraulic cylinder segmented pressure testing equipment also includes positioning components of multiple different lengths. A set of positioning components is placed between the movable baffle in the hydraulic cylinder mounting groove and the other end of the hydraulic cylinder mounting groove to resist the piston rod pressure of the hydraulic cylinder to be tested on the movable baffle.

[0007] According to the hydraulic cylinder segmented pressure testing equipment, the positioning component is formed by welding metal plates and has two horizontal plates and two vertical plates. The two vertical plates are located between the two horizontal plates, and the upper and lower ends of the vertical plates are welded to the inner side of the upper and lower horizontal plates. The upper horizontal plate is also welded with a hook.

[0008] According to the hydraulic cylinder segmented pressure testing equipment, a pushing hydraulic cylinder is also provided. The cylinder body of the pushing hydraulic cylinder is connected to the rectangular frame and is located on the other side where the connecting ear plate is set. The front end of the piston rod of the pushing hydraulic cylinder is connected to the moving baffle. The pushing hydraulic cylinder pushes the moving baffle to move in the hydraulic cylinder mounting groove. The inlet and outlet of the pushing hydraulic cylinder are connected to the hydraulic station through hydraulic hoses.

[0009] According to the hydraulic cylinder segmented pressure testing equipment, the horizontal and vertical structures of the rectangular frame are welded from H-shaped profiles. A reinforcing plate is provided at the welding position to connect the horizontal and vertical structures. The bottom of the horizontal or vertical structure is provided with pads. The bottom of the hydraulic cylinder mounting groove is provided with a metal base plate. The horizontal or vertical structure is provided with hooks.

[0010] According to the hydraulic cylinder segmented pressure testing equipment, the moving block has a through hole in the middle, the longitudinal structure passes through the longitudinal through hole, the part of the moving block that is in the hydraulic cylinder mounting groove has a mounting groove, the bottom of the mounting groove is not through, and the two sides of the moving baffle are respectively embedded in the mounting grooves of the two moving blocks.

[0011] According to the hydraulic cylinder segmented pressure testing equipment, the moving blocks on both sides of the moving baffle are connected by a connecting plate.

[0012] This invention allows for more detailed observation and analysis of the pressure changes, deformation, and load-bearing capacity of the jack at each stage during segmented pressure testing at different lengths. This helps to promptly identify potential performance problems, such as decreased sealing performance or internal structural damage, providing a scientific basis for timely repair or replacement of the jack.

[0013] This invention enables segmented pressure testing of hydraulic jacks, accurately simulating the stress on the jacks at various working lengths according to the actual needs of the underground working face. Whether a shorter length is used for local fine-tuning or a longer length is used for large-scale support operations, its corresponding load-bearing capacity can be accurately tested before use. Attached Figure Description

[0014] Figure 1 This is a diagram of the compound structure of this utility model. Figure 2 This is a side view of the structure of this utility model. Figure 3 This is a cross-sectional structural diagram of this utility model. Figure 4This is a hydraulic connection diagram of this utility model.

[0015] Figure reference numerals: 1 hydraulic station, 2 hydraulic cylinder to be tested, 3 rectangular frame, 31 slide groove, 32 connecting ear plate, 33 pad, 34 reinforcing plate, 35 hydraulic cylinder mounting groove, 4 moving baffle, 6 moving block, 61 screw hole, 62 fixing bolt, 63 connecting plate, 7 positioning component, 8 hook, 9 pushing hydraulic cylinder. Implementation

[0016] The specific details of this utility model will be further described below. The hydraulic cylinder segmented pressure testing equipment of this utility model is used to test the pressure working condition of the hydraulic cylinder 2 under different extension and retraction states, including hydraulic station 1, rectangular frame 3 and movable baffle 4.

[0017] Specifically, rectangular frame 3 is a frame structure welded from metal. The horizontal and vertical structures of rectangular frame 3 are constructed from H-shaped profiles, specifically 10mm thick I-beams. Reinforcing plates 34 are installed at the welding points of the horizontal and vertical structures to connect them. The I-beams possess high strength and bending resistance, enabling them to withstand various forces generated during the pressure test, ensuring the stability of the equipment during testing and providing robust support for the entire pressure testing equipment.

[0018] The bottom of the horizontal or vertical structure is provided with pads, and the middle of the rectangular frame is provided with a long groove-shaped hydraulic cylinder mounting groove 35. The bottom of the hydraulic cylinder mounting groove 35 is provided with a metal base plate, and the horizontal or vertical structure is provided with a hook.

[0019] The movable baffle 4 is located in the mounting groove 35 for the hydraulic cylinder. Movable blocks 6 are provided on both sides of the movable baffle 4. A through hole is opened in the middle of the movable block 6. The longitudinal structure passes through the longitudinal through hole, and the movable block can slide along the longitudinal structure in the sliding groove.

[0020] The movable block 6 has a positioning groove in the part located in the hydraulic cylinder mounting groove 35. The bottom of the positioning groove is not through. The two sides of the movable baffle 4 are respectively embedded in the positioning grooves of the two movable blocks 6. The movable blocks 6 on both sides of the movable baffle 4 are connected by a connecting plate to form an integrated operating structure.

[0021] The outer sides of the longitudinal structure on both sides are provided with concave grooves 31. Part of the structure of the movable block is embedded in the grooves 31. The movable block 6 has screw holes, and fixing bolts are installed in the screw holes. The fixing bolts pass through the screw holes and press against the grooves 31 to fix the fixed block.

[0022] The movable baffle 4 uses a Φ30 steel plate as the main load-bearing component to fix the jack and withstand the reaction force during the pressure test.

[0023] A connecting ear plate 32 is also provided at the middle position of one end of the hydraulic cylinder mounting groove 35. The cylinder end fixing hole of the hydraulic cylinder 2 to be tested is coaxially connected to the through hole on the connecting ear plate 32 through a pin. The inlet hole of the hydraulic cylinder 2 to be tested is connected to the hydraulic station 1 through a hydraulic hose. The piston rod end of the hydraulic cylinder 2 to be tested abuts against the moving baffle 4.

[0024] Furthermore, multiple positioning components 7 of different lengths are provided. A set of positioning components 7 is placed between the movable baffle 4 in the hydraulic cylinder mounting groove 35 and the other end of the hydraulic cylinder mounting groove 35, resisting the piston rod pressure of the hydraulic cylinder 2 under test on the movable baffle 4. This positioning component, together with the fixing bolts on the movable block, can fix the movable baffle, preventing the hydraulic cylinder under test from pushing the movable baffle under strong pressure, which would cause the test to fail.

[0025] The positioning component 7 of this device is formed by welding metal plates. It has two horizontal plates and two vertical plates. The two vertical plates are located between the two horizontal plates. The upper and lower ends of the vertical plates are welded to the inner side of the horizontal plates at the upper and lower positions. The upper horizontal plate is also welded with a hook.

[0026] Furthermore, a push hydraulic cylinder 9 is provided. The cylinder body of the push hydraulic cylinder 9 is connected to the rectangular frame 3 and is located on the other side where the connecting ear plate 32 is set. The piston rod of the push hydraulic cylinder 9 is connected to the movable baffle 4. The push hydraulic cylinder 9 pushes the movable baffle 4 to move in the hydraulic cylinder mounting groove 35. The inlet and outlet of the push hydraulic cylinder 9 are connected to the hydraulic station 1 through hydraulic hoses.

[0027] The hydraulic cylinder 9 moves the moving baffle and moving block vertically to adjust the position of the moving baffle, facilitating testing of the hydraulic cylinder at different extension lengths. This method is more labor-saving and efficient than manual pushing.

[0028] The specifications of the components in this device are described below. The hydraulic hose uses a φ10 specification, ensuring appropriate flow rate and pressure loss when transmitting high-pressure liquid. This meets the pressure requirements for pressure testing while ensuring accurate pressure transmission. With a pressure rating of 30 MPa, it can withstand pressures up to 30 MPa, exceeding the pressure range required for typical jack pressure testing. This provides ample pressure reserve for the safe and stable operation of the equipment, ensuring normal operation under various testing conditions without rupture or leakage.

[0029] The rectangular frame uses 10mm thick H-shaped profiles. Their cross-sectional shape and dimensions are designed to provide excellent mechanical properties, maintaining structural stability while withstanding significant loads and providing robust support for the overall equipment frame. The movable baffle is made of 30mm thick steel plate, ensuring it will not suffer fatigue damage or deformation due to repeated pressure during long-term use.

[0030] The process of using this device: The movable baffle is moved under the push of the hydraulic cylinder, ensuring that the distance between the movable baffle and the connecting ear plate is greater than the length of the hydraulic cylinder to be tested. The fixing screws on the side of the movable block are screwed into the longitudinal structure of the contact rectangle, and the cylinder body of the hydraulic cylinder to be tested is fixed to the connecting ear plate. Then, the movable baffle is pushed to the designated position by the hydraulic cylinder, and the positioning component is placed in. The hydraulic cylinder to be tested is connected to the hydraulic station, and high-pressure hydraulic oil is introduced. The piston rod of the hydraulic cylinder to be tested is pushed out to contact the movable baffle, and then the hydraulic station pressurizes. The pressure on both sides of the movable baffle is balanced, and the working condition of the hydraulic cylinder to be tested is tested under the working pressure.

[0031] After the hydraulic cylinder under test is tested, the positioning parts are removed according to the different extension length requirements. The fixing bolts on the moving block are loosened, the positioning parts are removed, the piston rod of the hydraulic cylinder under test is retracted, and the moving baffle is moved to change position using the pushing hydraulic cylinder. Positioning parts of other specifications are then placed again, and the fixing bolts are fixed. The hydraulic station is started to supply high-pressure hydraulic oil to the hydraulic cylinder under test. The piston rod extends and presses against the moving baffle, and the hydraulic cylinder under test is tested again.

[0032] Record the pressure on the piston rod of the hydraulic cylinder at different extended lengths to ensure that the hydraulic cylinder under test can provide support under different extension conditions. If hydraulic leakage occurs at a certain extended piston rod length, record the condition of the hydraulic cylinder and repair or scrap it as appropriate.

[0033] This invention allows for more detailed observation and analysis of the pressure changes, deformation, and load-bearing capacity of the jack at each stage during segmented pressure testing at different lengths. This helps to promptly identify potential performance problems, such as decreased sealing performance or internal structural damage, providing a scientific basis for timely repair or replacement of the jack.

Claims

1. A hydraulic cylinder segmented pressure testing device, wherein the end of the cylinder body of the hydraulic cylinder (2) to be tested is provided with a fixing hole, characterized in that, It includes a hydraulic station (1), a rectangular frame (3), and a movable baffle (4). The rectangular frame (3) is a frame structure welded from metal. It has a long groove-shaped hydraulic cylinder mounting groove (35) in the middle and concave sliding grooves (31) on both sides. The movable baffle (4) is located in the hydraulic cylinder mounting groove (35). Movable blocks (6) are provided on both sides of the movable baffle (4). Part of the structure of the movable block is embedded in the sliding groove (31). The movable block (6) has a screw hole. A fixing bolt is provided in the screw hole. The fixing bolt passes through the screw hole and pushes against the sliding groove (31) to fix the fixing block. A connecting ear plate (32) is provided at the middle position of one end of the hydraulic cylinder mounting groove (35). The cylinder end fixing hole of the hydraulic cylinder (2) to be tested is coaxially connected to the through hole on the connecting ear plate (32) through a pin. The inlet hole of the hydraulic cylinder (2) to be tested is connected to the hydraulic station (1) through a hydraulic hose. The piston rod end of the hydraulic cylinder (2) to be tested abuts against the moving baffle (4).

2. The hydraulic cylinder segmented pressure testing equipment according to claim 1, characterized in that, It also includes positioning components (7), which are of multiple different lengths. A set of positioning components (7) is placed between the movable baffle (4) in the hydraulic cylinder mounting groove (35) and the other end of the hydraulic cylinder mounting groove (35) to press against the piston rod pressure of the hydraulic cylinder (2) to be tested on the movable baffle (4).

3. The hydraulic cylinder segmented pressure testing equipment according to claim 2, characterized in that, The positioning component (7) is formed by welding metal plates and has two horizontal plates and two vertical plates. The two vertical plates are located between the two horizontal plates. The upper and lower ends of the vertical plates are welded to the inner side of the horizontal plates at the upper and lower positions. The upper horizontal plate is also welded with a hook.

4. The hydraulic cylinder segmented pressure testing equipment according to claim 1, characterized in that, A push hydraulic cylinder (9) is also provided. The cylinder body of the push hydraulic cylinder (9) is connected to the rectangular frame (3) and is located on the other side of the connecting ear plate (32). The piston rod of the push hydraulic cylinder (9) is connected to the moving baffle (4). The push hydraulic cylinder (9) pushes the moving baffle (4) to move in the hydraulic cylinder mounting groove (35). The inlet and outlet of the push hydraulic cylinder (9) are connected to the hydraulic station (1) through hydraulic hoses.

5. The hydraulic cylinder segmented pressure testing equipment according to claim 1, characterized in that, The rectangular frame (3) has H-shaped welded horizontal and vertical structures. A reinforcing plate (34) is provided at the welding position to connect the horizontal and vertical structures. The bottom of the horizontal or vertical structure is provided with pads. The bottom of the hydraulic cylinder mounting groove (35) is provided with a metal base plate. The horizontal or vertical structure is provided with hooks.

6. The hydraulic cylinder segmented pressure testing equipment according to claim 5, characterized in that, The moving block (6) has a through hole in the middle, and the longitudinal structure passes through the longitudinal through hole. The moving block (6) is provided with a positioning groove in the part located in the hydraulic cylinder mounting groove (35). The bottom of the positioning groove is not through. The two sides of the moving baffle (4) are respectively embedded in the positioning grooves of the two moving blocks (6).

7. The hydraulic cylinder segmented pressure testing equipment according to claim 6, characterized in that, The movable blocks (6) on both sides of the movable baffle (4) are connected by a connecting plate.

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