Hydraulic oil cylinder testing device

Abstract

The utility model discloses a hydraulic oil cylinder testing device, which relates to the technical field of oil cylinder testing, and comprises a mounting base, an anti-explosion pool, a main beam, a lifting mechanism, a compressor, an air distribution assembly and a lifting plate, the lifting mechanism is arranged on the main beam, the compressor is arranged on one side of the main beam, the air distribution assembly is arranged at the output end of the compressor, and the lifting plate is arranged on the mounting base. The output end of the gas distribution assembly is connected with the oil cylinder body, and the lifting plate is arranged in the anti-explosion pool. The oil cylinder bodies are placed on the lifting plate, lifting of the lifting plate is controlled through the lifting mechanism, then the lifting plate and the oil cylinder bodies placed above the lifting plate are controlled to be immersed in water, the output end of the compressor is connected with the air distribution assembly, then the oil cylinder bodies are connected, and the output pressure of the compressor is kept; and observing whether the oil cylinder bodies generate bubbles to confirm the sealing performance of the oil cylinder bodies, so that the sealing performance of a plurality of oil cylinders can be simultaneously tested at one time through the method, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder testing technology, and in particular to a hydraulic cylinder testing device. Background Technology

[0002] Pre-shipment sealing tests of hydraulic cylinders can be performed using either air or hydraulic oil. Using air offers advantages such as lower cost, a simpler testing system, and cleaner, pollution-free operation. Air is widely available, easily accessible, and inexpensive, eliminating the need for additional oiling equipment and large quantities of hydraulic oil, thus reducing testing costs. This makes it particularly suitable for preliminary testing in large-scale production. The testing system is relatively simple, requiring no complex oil filling and return lines. Simply connect an air compressor to the cylinder for inflation testing, making operation convenient and quick, and improving testing efficiency. Unlike hydraulic oil, air does not remain inside or outside the cylinder after testing, avoiding contamination of the product and the environment, and eliminating the need for tedious cleaning procedures.

[0003] However, using air for pre-shipment sealing tests of hydraulic cylinders also has some significant drawbacks. The most prominent is the relatively low testing efficiency. Due to the characteristics of air and limitations of the testing method, only one cylinder can typically be tested at a time in actual testing. This is because air is compressible, and testing a single cylinder requires precise control of the air pressure input and monitoring of pressure changes to ensure accurate detection of potential leaks. Testing multiple cylinders simultaneously presents challenges: firstly, it's difficult to guarantee a stable and suitable air pressure input for each cylinder, leading to uneven pressure distribution and affecting the accuracy of the test results; secondly, monitoring pressure changes across multiple cylinders simultaneously becomes extremely complex, making it difficult to identify which cylinder is leaking or experiencing abnormal pressure. Therefore, using air for sealing tests typically limits testing efficiency to one cylinder at a time, especially in large-scale production, potentially causing the testing process to become a bottleneck and extending the product's production cycle. To address these issues, a hydraulic cylinder testing device is proposed to meet practical needs. Utility Model Content

[0004] This invention provides a hydraulic cylinder testing device that solves the technical problem of difficulty in detecting minute leaks when using air to test the airtightness of hydraulic cylinders.

[0005] To solve the above-mentioned technical problems, this utility model provides a hydraulic cylinder testing device, including a mounting base, an explosion-proof pool, a main beam, a lifting mechanism, a compressor, an air distribution component, and a lifting plate. The explosion-proof pool is located above the mounting base and is surrounded by explosion-proof glass. Support frames are provided on both the left and right sides of the explosion-proof pool. The two ends of the main beam are fixedly connected to the tops of the two support frames. The lifting mechanism is located on the main beam, the compressor is located on one side of the main beam, the air distribution component is located at the output end of the compressor, and the output end of the air distribution component is connected to the cylinder body. The lifting plate is located in the explosion-proof pool, and the lifting mechanism controls the lifting of the lifting plate. The cylinder body is placed on the lifting plate.

[0006] In some embodiments, the gas distribution assembly includes a first three-way valve, the input end of which is connected to the output end of the compressor, and two output ends of the first three-way valve are each connected to a second three-way valve. Two output ends of the second three-way valve are each connected to a five-way valve, and each output end of the five-way valve is connected to a self-sealing quick-connect pipe. One end of the self-sealing quick-connect pipe is provided with a self-sealing quick connector, and the self-sealing quick connector is connected to the oil port of the cylinder body.

[0007] In some embodiments, the lifting mechanism includes a motor support plate, a reduction motor is fixedly mounted on the side of the motor support plate, the output end of the reduction motor is provided with a rotating shaft, a bearing seat is provided on the rotating shaft, the bearing seat is fixedly mounted on the main beam, a winding wheel is fixedly fitted on the surface of the rotating shaft, a cable is wound on the winding wheel, and connecting rings are connected to both ends of the cable, the connecting rings are fixedly mounted on both sides of the lifting plate.

[0008] In some embodiments, there are two winding wheels, which are symmetrically distributed on the left and right sides of the lifting plate. Mounting sleeves are fixedly installed on both sides of the lifting plate. Guide rods are movably sleeved on the mounting sleeves. The top end of the guide rods is connected to the main beam, and the bottom end of the guide rods is connected to the mounting base.

[0009] In some embodiments, a fixing plate is fixedly installed on the side of the main beam, and the compressor is fixedly installed on the side of the fixing plate.

[0010] In some embodiments, a testing fixture is further included, which is fixed to the top of the lifting plate. A partition plate is fixedly installed on the top of the testing fixture. The partition plate has a slot that matches the fixed column. A protective pad is provided on one side of the testing fixture. An arc-shaped groove is provided above the protective pad. The protective pad is fixedly installed on the top of the lifting plate.

[0011] In some embodiments, there are nine partition plates, and eight mounting positions matching the size of the cylinder body are provided between the nine partition plates. The left and right partition plates have at least two slots, and the remaining partition plates have four slots. The cylinder bodies of adjacent mounting positions are staggered.

[0012] In some embodiments, the size of the lifting plate is smaller than that of the explosion-proof pool, and the surface of the lifting plate is provided with multiple slits.

[0013] In some embodiments, the explosion-proof pool contains water, and the four corners of the bottom of the mounting base are provided with brakeable rollers.

[0014] Compared with related technologies, the hydraulic cylinder testing device provided by this utility model has the following beneficial effects:

[0015] This utility model provides a hydraulic cylinder testing device. By placing the cylinder body on a lifting plate and controlling the lifting of the lifting plate using a lifting mechanism, the lifting plate and the cylinder body placed on it are immersed in water. The device connects to the air distribution assembly through the output end of a compressor, thereby connecting several cylinder bodies. By maintaining the output pressure of the compressor, the device observes whether air bubbles are generated in the cylinder bodies to confirm the sealing performance of several cylinder bodies. Through the above method, the sealing performance of multiple cylinders can be tested simultaneously, greatly improving the testing efficiency.

[0016] This utility model provides a hydraulic cylinder testing device. The explosion-proof pool and the explosion-proof glass used in the pool can prevent accidental injury caused by the release of compressed air with great energy if the cylinder ruptures or the seal fails during high-pressure air testing. Furthermore, since the tested cylinder is located underwater during testing, safety can be further enhanced.

[0017] This utility model provides a hydraulic cylinder testing device. The self-sealing quick-connect pipe can function as a normally closed loop when not connected to the cylinder body to prevent compressed gas leakage. When connected to the cylinder body, it can automatically connect, simplifying the structure, optimizing operation, and improving testing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the lifting mechanism structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the gas distribution component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the test fixture structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the hydraulic cylinder body structure of this utility model.

[0023] The diagram is labeled as follows: 100, cylinder body; 200, fixing sleeve; 300, fixing column; 400, oil port; 1, mounting base; 2, explosion-proof pool; 3, explosion-proof glass; 4, roller; 5, support frame; 6, main beam; 7, lifting mechanism; 8, compressor; 9, gas distribution assembly; 10, lifting plate; 11, testing fixture; 71, motor support plate; 72, geared motor; 73, rotating shaft; 74, winding wheel; 75, bearing seat; 76, cable; 77, connecting ring; 81, fixing plate; 91, first tee; 92, second tee; 93, five-way valve; 94, self-sealing quick-connect pipe; 101, mounting sleeve; 102, guide rod; 111, partition plate; 112, slot; 113, protective pad; 114, arc groove. Detailed Implementation

[0024] Example 1

[0025] This embodiment provides a hydraulic cylinder testing device, such as... Figure 1-5 As shown, this utility model includes a mounting base 1, an explosion-proof pool 2, a main beam 6, a lifting mechanism 7, a compressor 8, a gas distribution assembly 9, and a lifting plate 10. The explosion-proof pool 2 is positioned above the mounting base 1, and explosion-proof glass 3 is provided around its perimeter. Support frames 5 are provided on both the left and right sides of the explosion-proof pool 2. The two ends of the main beam 6 are fixedly connected to the tops of the two support frames 5. The lifting mechanism 7 is mounted on the main beam 6, the compressor 8 is mounted on one side of the main beam 6, the gas distribution assembly 9 is located at the output end of the compressor 8, and the output end of the gas distribution assembly 9 is connected to the cylinder body 100. The lifting plate 10 is positioned in the explosion-proof pool 2, and the lifting mechanism 7 controls the lifting plate 10 to rise and fall. The cylinder body 100 is placed on the lifting plate 10. A fixing sleeve 200 is fixedly fitted onto the surface of the cylinder body 100, and fixing posts 300 are integrally formed on both the left and right sides of the fixing sleeve 200. An oil port 400 is provided on the surface of the cylinder body 100.

[0026] In this embodiment, by placing the cylinder body 100 on the lifting plate 10 and controlling the lifting and lowering of the lifting plate 10 using the lifting mechanism 7, the lifting plate 10 and the cylinder body 100 placed on it are immersed in water. The compressor 8 is connected to the air distribution assembly 9, thereby connecting several cylinder bodies 100. The output pressure of the compressor 8 is maintained, and the generation of air bubbles in the cylinder bodies 100 is observed to confirm the sealing performance of the cylinder bodies 100. This method allows for simultaneous testing of the sealing performance of multiple cylinders, significantly improving testing efficiency. The explosion-proof pool 2 and the explosion-proof glass 3 used in the explosion-proof pool 2 prevent accidental injury caused by the release of high-pressure compressed air with significant energy should a cylinder rupture or seal fail during high-pressure air testing. Furthermore, the fact that the tested cylinder is submerged in water during testing further enhances safety.

[0027] Example 2

[0028] Based on Example 1, such as Figure 3-4 As shown, the gas distribution assembly 9 in this embodiment includes a first three-way valve 91. The input end of the first three-way valve 91 is connected to the output end of the compressor 8. Both output ends of the first three-way valve 91 are connected to a second three-way valve 92. Both output ends of the second three-way valve 92 are connected to a five-way valve 93. Each output end of the five-way valve 93 is connected to a self-sealing quick-connect pipe 94. One end of the self-sealing quick-connect pipe 94 is provided with a self-sealing quick connector, which is connected to the oil port 400 of the cylinder body 100.

[0029] In this embodiment, a gas distribution assembly 9 with a total of sixteen output ports can be obtained through the above connection method, which can test sixteen oil cylinders at the same time. Furthermore, the self-sealing quick connector can play a normally closed role when not connected to the oil cylinder body 100 to avoid compressed gas leakage. When connected to the oil cylinder body 100, it can automatically connect, eliminating the need for a valve structure. In practice, the gas distribution assembly 9 can be fixed to the main beam 6 with a connecting plate as needed.

[0030] Example 3

[0031] Based on Example 1, such as Figure 2 As shown, the lifting mechanism 7 in this embodiment includes a motor support plate 71. A reduction motor 72 is fixedly installed on the side of the motor support plate 71. The output end of the reduction motor 72 is provided with a rotating shaft 73. A bearing seat 75 is provided on the rotating shaft 73. The bearing seat 75 is fixedly installed on the main beam 6. A winding wheel 74 is fixedly fitted on the surface of the rotating shaft 73. A cable 76 is wound on the winding wheel 74. Both ends of the cable 76 are connected to connecting rings 77. The connecting rings 77 are fixedly installed on both sides of the lifting plate 10.

[0032] In this embodiment, the output end of the geared motor 72 drives the rotating shaft 73 to rotate, which in turn drives the take-up reel 74 to realize the functions of winding and unwinding. The middle part of the cable 76 is fixed to the take-up reel 74, so that the cables 76 on both sides of the take-up reel 74 are of equal length, thereby ensuring the stability of the lifting plate 10. The cable 76 is slightly inclined to the take-up reel 74, so that the cable 76 is in a spring-like shape when wound on the take-up reel 74.

[0033] Example 4

[0034] Based on Example 3, such as Figure 1-2 As shown, in this embodiment, there are two winding wheels 74. The two winding wheels 74 are symmetrically distributed on the left and right sides of the lifting plate 10. Mounting sleeves 101 are fixedly installed on both the left and right sides of the lifting plate 10. Guide rods 102 are movably sleeved on the mounting sleeves 101. The top end of the guide rods 102 is connected to the main beam 6, and the bottom end of the guide rods 102 is connected to the mounting base 1.

[0035] In this embodiment, ensuring the balance of the lifting plate 10 can further guarantee the stability of the lifting plate 10 during lifting.

[0036] Example 5

[0037] Based on Example 1, such as Figure 3 As shown, in this embodiment, a fixing plate 81 is fixedly installed on the side of the main beam 6, and the compressor 8 is fixedly installed on the side of the fixing plate 81.

[0038] In this embodiment, the pressure gauge of the compressor 8 is positioned to the side by the fixed plate 81, making it easier for the tester to observe.

[0039] Example 6

[0040] Based on Example 1, such as Figure 4 As shown, this embodiment also includes a test fixture 11, which is fixed to the top of the lifting plate 10. A partition plate 111 is fixedly installed on the top of the test fixture 11. A slot 112 matching the fixed column 300 is provided on the partition plate 111. A protective pad 113 is provided on one side of the test fixture 11, and an arc groove 114 is provided above the protective pad 113. The protective pad 113 is fixedly installed on the top of the lifting plate 10.

[0041] In this embodiment, during testing, the cylinder body 100 can be directly placed between two adjacent partition plates 111 through the cooperation of the fixing column 300 and the slot 112 to limit the cylinder body 100. The protective pad 113 is used to keep the cylinder body 100 horizontal, so as to avoid friction between the output end of the cylinder and the lifting plate 10, which would cause wear.

[0042] Example 7

[0043] Based on Example 6, such as Figure 4 As shown, in this embodiment, there are nine partition plates 111. There are eight mounting positions between the nine partition plates 111 that match the size of the cylinder body 100. There are at least two slots 112 on the left and right partition plates 111, and four slots 112 on the remaining partition plates 111. The cylinder bodies 100 of adjacent mounting positions are staggered.

[0044] In this embodiment, by staggering the cylinder bodies 100, multiple cylinder bodies 100 can be placed without occupying too much space, which allows for a smaller size design for the explosion-proof pool 2 and the lifting plate 10. This not only facilitates installation and testing by testers but also reduces usage costs. In addition, the output end of the cylinder body 100 can be installed facing both sides on the test fixture 11, which can further increase the number of tests.

[0045] Example 8

[0046] Based on Example 1, such as Figure 1-4 As shown, the size of the lifting plate 10 in this embodiment is smaller than that of the explosion-proof pool 2, and the surface of the lifting plate 10 is provided with multiple gaps.

[0047] In this embodiment, by reasonably setting the size and multiple gaps, the risk of collision between the lifting plate 10 and the explosion-proof pool 2 is avoided when the lifting plate 10 is raised and lowered, while the water in the explosion-proof pool 2 can be quickly immersed above the lifting plate 10 to avoid excessive water splashing when immersed.

[0048] Example 9

[0049] Based on Example 1, the explosion-proof pool 2 in this example contains water, and the four corners of the bottom of the mounting base 1 are equipped with brakeable rollers 4.

[0050] In this embodiment, the rollers 4 facilitate the movement of the testing device by the tester, increasing the ease of use of the device.

[0051] Working principle: By placing the cylinder body 100 on the lifting plate 10, the lifting mechanism 7 controls the lifting of the lifting plate 10, thereby controlling the lifting plate 10 and the cylinder body 100 placed on it to be immersed in water. The output end of the compressor 8 is connected to the air distribution assembly 9, thereby connecting several cylinder bodies 100. The output pressure of the compressor 8 is maintained, and it is observed whether air bubbles are generated in the cylinder body 100 to confirm the sealing performance of several cylinder bodies 100. Through the above method, the sealing performance of multiple cylinders can be tested at the same time, greatly improving the testing efficiency.

[0052] Implementation steps:

[0053] 1. First, the lifting mechanism 7 is used to control the lifting plate 10 to a higher position, so that the testers can place several cleaned oil cylinders to be tested on the test fixture 11, connect them to the oil port 400 using the self-sealing quick connection pipe 94, and at the same time inject an appropriate amount of clean water into the explosion-proof pool 2.

[0054] 2. Start the lifting mechanism 7 to control the lifting plate 10 to descend at a uniform speed. Stop the lifting mechanism 7 when it reaches below the explosion-proof pool 2. Then start the power supply of the compressor 8 and set the test pressure to 2MPa-5MPa.

[0055] 3. After the test cylinder has discharged a large amount of gas, observe whether bubbles continue to be generated on the surface of the test cylinder.

[0056] 4. Determine the sealing performance of the tested cylinder, turn off the power to the compressor 8, open the safety valve to release the pressure, restart the lifting mechanism 7 to control the lifting plate 10 to rise at a constant speed above the water surface, wipe the surface of the tested cylinder clean and place it according to its sealing performance.

Claims

1. A hydraulic cylinder testing device, characterized in that: The device includes a mounting base, an explosion-proof pool, a main beam, a lifting mechanism, a compressor, a gas distribution assembly, and a lifting plate. The explosion-proof pool is located above the mounting base and is surrounded by explosion-proof glass. Support frames are provided on both sides of the explosion-proof pool. The two ends of the main beam are fixedly connected to the tops of the two support frames. The lifting mechanism is located on the main beam, and the compressor is located on one side of the main beam. The gas distribution assembly is located at the output end of the compressor and is connected to the cylinder body. The lifting plate is located in the explosion-proof pool, and the lifting mechanism controls the lifting and lowering of the lifting plate. The cylinder body is placed on the lifting plate.

2. The hydraulic cylinder testing device according to claim 1, characterized in that, The gas distribution assembly includes a first three-way valve, the input end of which is connected to the output end of the compressor. Both output ends of the first three-way valve are connected to a second three-way valve, and both output ends of the second three-way valve are connected to a five-way valve. Each output end of the five-way valve is connected to a self-sealing quick-connect pipe. One end of the self-sealing quick-connect pipe is provided with a self-sealing quick connector, which is connected to the oil port of the cylinder body.

3. The hydraulic cylinder testing device according to claim 1, characterized in that, The lifting mechanism includes a motor support plate, on the side of which a reduction motor is fixedly installed. The output end of the reduction motor is provided with a rotating shaft, and a bearing seat is provided on the rotating shaft. The bearing seat is fixedly installed on the main beam. A winding wheel is fixedly fitted on the surface of the rotating shaft, and a cable is wound on the winding wheel. Both ends of the cable are connected to connecting rings, and the connecting rings are fixedly installed on both sides of the lifting plate.

4. The hydraulic cylinder testing device according to claim 3, characterized in that, The number of winding wheels is two, and the two winding wheels are symmetrically distributed on the left and right sides of the lifting plate. Mounting sleeves are fixedly installed on both sides of the lifting plate. Guide rods are movably sleeved on the mounting sleeves. The top end of the guide rods is connected to the main beam, and the bottom end of the guide rods is connected to the mounting base.

5. A hydraulic cylinder testing device according to claim 1, characterized in that, A fixing plate is fixedly installed on the side of the main beam, and the compressor is fixedly installed on the side of the fixing plate.

6. A hydraulic cylinder testing device according to claim 1, characterized in that, It also includes a testing fixture, which is fixed to the top of the lifting plate. A partition plate is fixedly installed on the top of the testing fixture. The partition plate has a slot that matches the fixed column. A protective pad is provided on one side of the testing fixture. An arc-shaped groove is provided above the protective pad. The protective pad is fixedly installed on the top of the lifting plate.

7. A hydraulic cylinder testing device according to claim 6, characterized in that, There are nine partition plates, and eight mounting positions matching the size of the cylinder body are provided between the nine partition plates. The left and right partition plates have at least two slots, and the remaining partition plates have four slots. The cylinder bodies of adjacent mounting positions are placed alternately.

8. A hydraulic cylinder testing device according to claim 1, characterized in that, The size of the lifting plate is smaller than that of the explosion-proof pool, and the surface of the lifting plate has multiple slits.

9. A hydraulic cylinder testing device according to claim 1, characterized in that, The explosion-proof pool is filled with water, and the four corners of the bottom of the mounting base are equipped with brakeable rollers.

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