An experimental device and method for testing the performance of a seal

Abstract

The present invention discloses a test device and a test method for testing the performance of a seal, and the present invention relates to the technical field of seal testing. By setting the linkage between a plurality of test mechanisms and a test driving mechanism, during the movement of the test mechanism, the arc-shaped driving block can be used to push the assembly of the pressing component and the loading component, so that the pressing component, the loading component and the seal ring to be tested jointly form a closed space, providing a sealed environment for the entry of the subsequent test gas. Moreover, during one test process, a plurality of seals to be tested can be sequentially placed on a plurality of test mechanisms correspondingly, so that the test mechanisms loaded with the seals to be tested sequentially pass through the low-pressure test component, the medium-pressure test component and the high-pressure test component, achieving the purpose of continuously testing a plurality of seals and improving the test efficiency of the seals; it can automatically complete the sealing performance test of the rubber ring seal in low-pressure, medium-pressure and high-pressure environments, making the test process simpler.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing tests, and particularly to a test device and a test method for testing the performance of a seal. Background Art

[0002] The performance test of the seal is to ensure that the seal can operate normally and effectively under various working conditions after leaving the factory, so as to ensure that the performance of the seal meets the requirements of specific applications.

[0003] Refer to a pressing device for detecting the sealing performance of a sealing ring disclosed in the patent application with the publication number CN212363575U, which is composed of a bearing plate, a cylinder, a sealing ring mounting member, a motor, an air pump and other components. Select a sealing ring mounting member matching the sealing ring to be tested and fix it on the fixed clamping plate. Place the sealing ring on the sealing ring mounting member, start the cylinder to drive the clamping plate to clamp on the sealing ring, which is convenient for pressing the sealing ring and maintaining the sealing performance inside the sealing ring mounting member; by driving the bearing plate to move up and down, drive the sealing ring to descend into the detection water tank, submerge the sealing ring with the water in the detection water tank, and introduce high-pressure gas into the sealing ring mounting member through an air pipe, and the air bubbles in the water can be observed to detect the sealing performance of the sealing ring. The operation is convenient and the sealing effect can be intuitively observed.

[0004] After comprehensively analyzing the above patent, the following defects are obtained:

[0005] At present, the seal performance test device can only apply a fixed air pressure in the space where the sealing ring is located, and cannot test the sealing effect of the sealing ring under different pressure environments by combining different test air pressures. Moreover, when testing a single sealing ring, steps such as clamping and immersing in water are required, resulting in a cumbersome and complex test process, and it is not applicable to the sealing performance test of a large number of sealing rings; furthermore, when pressing the sealing ring, a large pressure needs to be applied to its surface, which easily causes the rubber sealing ring to adhere to the mounting member and is not easy to separate after the test, increasing the test time for a single sealing ring.

[0006] Therefore, the present invention proposes a test device and a test method for testing the performance of a seal to solve the above problems. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention provides a test device and a test method for testing the performance of a seal, which solve the problems that the current seal performance test device can only apply a fixed air pressure in the space where the sealing ring is located, and cannot test the sealing effect of the sealing ring under different pressure environments by combining different test air pressures. Moreover, when testing a single sealing ring, steps such as clamping and immersing in water are required, resulting in a cumbersome and complex test process and being unable to be applied to the sealing performance test of a large number of sealing rings. When pressing the sealing ring, a large pressure needs to be applied to its surface, which easily causes the rubber sealing ring to adhere to the installation part and is not easy to separate after the test, increasing the test time for a single sealing ring.

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions: A test device for testing the performance of a seal includes a test bench and a seal conveyor belt arranged on the top of the test bench. On one side of the top of the test bench, there is a turntable mechanism for conveying the seal to be tested to the test position. This turntable mechanism includes a servo motor fixedly arranged at the bottom of the test bench. The output shaft of the servo motor rotates through the test bench and is fixedly provided with a test turntable. On the top of the test turntable, a plurality of test mechanisms for carrying the rubber sealing ring and testing its sealing performance are evenly arranged. At the center position of the top of the test turntable, there is a test result feedback component for observing the test results of the sealing performance. On the top of the test bench and on one side of the test turntable, there is a gas supply mechanism for providing test gases with different pressure values to the test mechanisms. On the top of the test bench, there is also a test drive component for driving the test mechanism to complete the closing action and pressing the seal to be tested in a closed space.

[0009] Further, the gas supply mechanism includes a low-pressure gas supply component, a medium-pressure gas supply component, a high-pressure gas supply component, an air pump, and a controller;

[0010] The low-pressure gas supply component includes a low-pressure test component and a low-pressure gas storage unit. This low-pressure gas storage unit is used to convey a preset amount of low-pressure gas into the test mechanism at the corresponding position to complete the airtightness detection under the low-pressure state. The medium-pressure gas supply component includes a medium-pressure test component and a medium-pressure gas storage unit. This medium-pressure gas storage unit is used to convey a preset amount of medium-pressure gas into the medium-pressure test component to complete the airtightness detection under the medium-pressure state. The high-pressure gas supply component includes a high-pressure test component and a high-pressure gas storage unit. This high-pressure gas storage unit is used to convey a preset amount of high-pressure gas into the high-pressure test component to complete the airtightness detection under the high-pressure state. Inside the low-pressure gas storage unit, the medium-pressure gas storage unit, and the high-pressure gas storage unit, there are respectively fixedly arranged air pressure sensors for real-time monitoring of the air pressure inside the low-pressure gas storage unit, the medium-pressure gas storage unit, and the high-pressure gas storage unit. The controller controls the air pump to supplement gas into the low-pressure gas storage unit or the medium-pressure gas storage unit or the high-pressure gas storage unit according to the monitoring data of the air pressure sensors.

[0011] Furthermore, the test result feedback component includes a liquid storage cylinder for storing bromothymol blue solution, an electric heating rod is fixedly installed inside the liquid storage cylinder for heating the bromothymol blue solution after the color development reaction, and a plurality of observation ports are evenly opened on the side wall of the liquid storage cylinder, and transparent tempered glass is fixedly installed inside the observation ports.

[0012] Furthermore, the testing mechanism comprises a bottom plate, and a loading assembly and a pressing assembly are respectively arranged on two sides of the top of the bottom plate;

[0013] The loading assembly comprises a cylinder body 1 fixedly arranged on the top of the bottom plate, a plurality of avoidance grooves 1 and 2 are respectively provided in a circular array on the upper and lower positions of the outer wall of the cylinder body 1, a limit ring is fixedly sleeved on the outer wall of the cylinder body 1 and located between the avoidance grooves 1 and 2, and a support plate assembly for carrying the rubber ring seal to be tested is sleeved on the outer wall of the cylinder body 1;

[0014] The support plate assembly includes a sealing member placing platform slidably sleeved on the outer wall of the cylinder, and guide pillars are fixedly arranged on both sides of the bottom of the sealing member placing platform. The guide pillars slide through the limiting ring and extend to the outside. A spring is slidably sleeved on the outer wall of the guide pillar and located between the limiting ring and the sealing member placing platform. A connecting rod is fixedly arranged at the bottom ends of the two guide pillars and located inside the avoidance groove.

[0015] A plurality of limit blocks are evenly and fixedly arranged on the outer wall of the cylinder body 1 and below the seal placement platform, which are used to limit the downward movement distance of the seal placement platform. A pneumatic lifting assembly for assisting the rubber ring seal to separate from the seal placement platform is arranged inside the cavity of the cylinder body 1. An annular groove for placing the rubber ring seal is provided on the top of the seal placement platform, and a plurality of air holes 1 for use with the pneumatic lifting assembly are provided in the annular groove.

[0016] Furthermore, the pneumatic lifting assembly includes a cylinder body 2 fixedly arranged inside the cylinder body 1 through a support arm, a piston is sealingly and slidably arranged inside the cylinder body 2, a piston rod is fixedly arranged at the bottom of the piston, the bottom end of the piston rod slides through the cylinder body 2 and is fixedly connected to the connecting rod, and an air supply hose is fixedly arranged on the outer wall of the cylinder body 2 and above the piston, and the end of the air supply hose away from the cylinder body 2 is connected to the inside of the sealing member placement platform.

[0017] Further, the pressing assembly includes a support frame fixedly arranged on the bottom plate and an avoidance through groove three opened on the side wall of the support frame. On both sides of the side wall of the support frame close to the loading assembly, sliding rails are fixedly arranged. A lifting frame is jointly sleeved on the outer walls of the two sliding rails in a sliding manner. A limiting plate is fixedly arranged on the side wall of the support frame and below the lifting frame. A guide post two is fixedly arranged at the bottom of the lifting frame. The guide post two slidably penetrates through the limiting plate and extends to the outside. A second spring is slidably sleeved on the outer wall of the guide post two between the limiting plate and the lifting frame. A sealing plate assembly for pressing the rubber ring seal and jointly forming a closed space with the seal placing table is arranged at the bottom of the lifting frame. A detection gas receiving assembly for quantitatively conveying detection gas into its interior is arranged at the top of the sealing plate assembly;

[0018] The sealing plate assembly includes a cover plate fixedly arranged at the bottom of the lifting frame and a sealing sleeve fixedly sleeved on the outer wall of the cover plate. A leakage gas output pipe is fixedly arranged on the side wall of the sealing sleeve. The leakage gas output pipe penetrates through the avoidance through groove three and is connected with the test result feedback assembly.

[0019] Further, the detection gas receiving assembly includes a gas nozzle fixedly arranged at the top of the cover plate. One end of the gas nozzle penetrates through the cover plate and is communicated with its interior. A trigger rod is fixedly arranged at the bottom of the gas nozzle.

[0020] Further, the low-pressure test assembly, the medium-pressure test assembly and the high-pressure test assembly have the same structure. The low-pressure test assembly includes a first mounting frame fixedly arranged on the top of the test bench. A gas supply pipe is fixedly arranged on the top of the first mounting frame. An arc-shaped plate is fixedly arranged at one end of the gas supply pipe. An arc-shaped groove is opened on the side wall of the arc-shaped plate. An air hole two communicated with the gas supply pipe is opened in the arc-shaped groove. A touch switch for controlling the opening or closing of the air hole two is fixedly arranged on the side wall of the arc-shaped plate.

[0021] Further, the test driving assembly includes two second mounting frames fixedly arranged on both sides of the top of the test bench. A base is jointly fixedly arranged between the two second mounting frames. An arc-shaped driving block for pushing the lifting frame to move downward is fixedly arranged at the bottom of the base. Slope surfaces are arranged at both ends of the lifting frame.

[0022] The present invention also discloses a test method for testing the performance of a seal, which is used for a test device for testing the performance of a seal and specifically includes the following steps:

[0023] Step 1: The rubber ring seals to be detected are sequentially conveyed towards the test turntable through the seal conveyor belt. The servo motor drives the test turntable to rotate intermittently in the clockwise direction. The staff manually places the rubber ring seals in the test mechanism passing in front of them one by one by using the intermittent time of the rotation of the test turntable;

[0024] Step 2: When the test mechanism loaded with the rubber sealing ring meets the test driving component, the test driving component drives the test mechanism to perform a closing action to seal its internal space, and then it passes through the low-pressure test component, the medium-pressure test component, and the high-pressure test component in sequence. Each time it reaches the detection position of the low-pressure test component, the medium-pressure test component, or the high-pressure test component, it pauses for a preset time. The low-pressure gas storage unit, the medium-pressure gas storage unit, and the high-pressure gas storage unit quantitatively transport carbon dioxide detection gas to the low-pressure test component, the medium-pressure test component, and the high-pressure test component at the corresponding positions. Then, the low-pressure test component, the medium-pressure test component, and the high-pressure test component input the carbon dioxide detection gas into the test mechanism at the corresponding positions.

[0025] Step 3: When the test mechanism reaches the detection position of the low-pressure test component, observe the color change of the bromothymol blue solution inside the test result feedback component. If the bromothymol blue solution turns red, the sealing performance of the rubber ring seal is unqualified. If there is no obvious color change in the bromothymol blue solution, the rubber ring seal is qualified. After the preset intermittent time ends, continue to rotate. The test mechanism then enters the detection positions of the medium-pressure test component and the high-pressure test component in sequence. The detection process is the same as the detection operation when entering the low-pressure test component position, and the airtightness of the rubber ring is detected under medium pressure and high pressure in sequence.

[0026] The present invention provides a test device and a test method for testing the performance of a seal. Compared with the prior art, it has the following beneficial effects:

[0027] 1. A test device and a test method for testing the performance of a seal. By setting multiple test mechanisms and test driving mechanisms, a linkage is formed between them. During the movement of the test mechanism, the arc-shaped driving block can be used to push the assembly of the pressing component and the loading component, so that the pressing component, the loading component, and the seal ring to be tested jointly form a closed space, providing a sealed environment for the subsequent entry of the test gas. The assembly process of the pressing component and the loading component in this process can be automatically completed without separately setting a power device for this process, saving the cost of setting the power device and making the structure simpler. Secondly, during a single test process, multiple seals to be tested can be placed on multiple test mechanisms in sequence, so that the test mechanisms loaded with the seals to be tested pass through the low-pressure test component, the medium-pressure test component, and the high-pressure test component in sequence, achieving the purpose of continuously testing multiple seals and improving the test efficiency of the seals. Secondly, the test process of each seal only requires manual participation in the processes of feeding and taking materials. The intermediate test process does not require manual intervention and can automatically complete the airtightness test of the rubber ring seal in low-pressure, medium-pressure, and high-pressure environments, making the test process simpler, more convenient to operate, and reducing the labor intensity of the staff.

[0028] 2. An experimental device and method for testing the performance of a seal. By setting up a low-pressure test component, a medium-pressure test component, a high-pressure test component, and a low-pressure gas storage unit, a medium-pressure gas storage unit, and a high-pressure gas storage unit used in conjunction with the three, when the test mechanism reaches the test position of the low-pressure test component, the medium-pressure test component, or the high-pressure test component, the test mechanism can use the trigger rod to push the touch switch, so that the second air hole automatically opens, and then the test gas with the corresponding test pressure value can be transported into the closed space jointly formed by the pressing component, the loading component, and the seal ring to be tested, achieving the purpose of automatically transporting the test gas. Secondly, the low-pressure test component, the medium-pressure test component, and the high-pressure test component can create a test environment with multiple air pressure values for each rubber seal ring to be tested, so that each rubber seal ring is successively in the low-pressure, medium-pressure, and high-pressure test environments, thus more realistically simulating the working environment of the rubber seal ring and improving the authenticity and reliability of the test results. Moreover, the low-pressure gas storage unit, the medium-pressure gas storage unit, and the high-pressure gas storage unit can replenish the lost gas volume in real time according to the air pressure changes in the low-pressure test component, the medium-pressure test component, and the high-pressure test component, thereby ensuring the stability of the test gas pressure value during the test process and the accuracy of the test results.

[0029] 3. An experimental device and method for testing the performance of a seal. By setting up a pneumatic lifting component in the loading component, when the seal placing table moves downward, the piston can be driven to move downward synchronously. When the piston moves downward, the air around the first air hole is sucked, creating a negative pressure environment around the first air hole, and the rubber seal ring to be tested set at the top of the first air hole can be stably adsorbed to prevent its position from shifting. Secondly, when the piston moves upward, the piston can push the gas inside the second cylinder to be discharged through the second air hole, and the discharged gas can lift the rubber seal ring attached to the top of the seal placing table, separating the rubber seal ring from the seal placing table, so that the staff can conveniently take out the rubber seal ring after the test, reducing the time for unloading the rubber seal ring and thus accelerating the speed of testing the seal.

[0030] 4. An experimental device and method for testing the performance of a seal. By setting up a test result feedback component, using the chemical reaction principle between carbon dioxide and bromothymol blue solution, the sealing effect of the test seal can be observed more clearly by observing the color change of the bromothymol blue solution. Compared with the traditional method of observing whether there are bubbles generated, the present invention can obtain the detection result more clearly and quickly. Secondly, by heating the bromothymol blue solution after color development, the decomposition of carbonic acid inside it can be accelerated, so that the bromothymol blue solution can be repeatedly used in the detection process, realizing repeated utilization and saving the test cost. Description of the Drawings

[0031] Figure 1Schematic diagram of the first overall three-dimensional structure of the present invention;

[0032] Figure 2 Schematic diagram of the second overall three-dimensional structure of the present invention;

[0033] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of part A;

[0034] Figure 4 Schematic diagram of the structure of the present invention with the test drive component removed;

[0035] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of part B;

[0036] Figure 6 Schematic diagram of the first state structure of the test mechanism of the present invention;

[0037] Figure 7 Schematic diagram of the second state structure of the test mechanism of the present invention;

[0038] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of part C;

[0039] Figure 9 Schematic diagram of the sectional structure of the loading component of the present invention;

[0040] Figure 10 Schematic diagram of the sectional structure of the pressing component of the present invention;

[0041] Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure of part D;

[0042] Figure 12 Schematic diagram of the assembled state of the seal placement table and the cover plate of the present invention;

[0043] Figure 13 Schematic diagram of the low-pressure test component of the present invention;

[0044] Figure 14 For the present invention Figure 13 Schematic diagram of the enlarged structure of part E;

[0045] Figure 15 Schematic diagram of the test drive component of the present invention.

[0046] In the figure: 1. Test bench; 2. Sealing belt conveyor; 3. Test turntable; 4. Test mechanism; 41. Loading component; 411. First cylinder; 412. First avoidance through groove; 413. Second avoidance through groove; 414. Limit ring; 415. Sealing element placement table; 416. First guide post; 417. First spring; 418. Connecting rod; 419. Limit block; 4110. Second cylinder; 4111. Piston; 4112. Piston rod; 4113. Gas transmission hose; 4114. First air hole; 42. Pressing component; 421. Support frame; 422. Third avoidance through groove; 423. Lifting frame; 424. Cover plate; 425. Sealing sleeve; 426. Leakage gas output pipe; 427. Limit plate; 428. Second guide post; 429. Second spring; 4210. Air nozzle; 4211. Trigger rod; 5. Test result feedback component; 6. Low-pressure test component; 61. First mounting frame; 62. Air supply pipe; 63. Arc plate; 64. Arc groove; 65. Second air hole; 66. Touch switch; 7. Medium-pressure test component; 8. High-pressure test component; 9. Low-pressure gas storage unit; 10. Medium-pressure gas storage unit; 11. High-pressure gas storage unit; 12. Air pump; 13. Test drive component; 131. Second mounting frame; 132. Base; 133. Arc drive block. Specific embodiments

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] As Figures 1 to 15 , the present invention provides four technical solutions: An experimental device for testing the performance of a sealing element, specifically including the following embodiments:

[0049] Embodiment 1: A test device for testing the performance of a seal, comprising a test bench 1 and a seal conveyor belt 2 arranged on the top of the test bench 1. On one side of the top of the test bench 1, there is a turntable mechanism for conveying the seal to be tested to the test position. The turntable mechanism includes a servo motor fixedly arranged at the bottom of the test bench 1. The output shaft of the servo motor rotates through the test bench 1 and is fixedly provided with a test turntable 3. On the top of the test turntable 3, a plurality of test mechanisms 4 for carrying rubber sealing rings and testing their sealing performance are evenly arranged. At the center position of the top of the test turntable 3, there is a test result feedback component 5 for observing the test results of the sealing performance. On the top of the test bench 1 and on one side of the test turntable 3, there is a gas supply mechanism for supplying test gases with different pressure values to the test mechanism 4. On the top of the test bench 1, there is also a test drive component 13 for driving the test mechanism 4 to complete a closing action and pressing the seal to be tested in a closed space. The seal conveyor belt 2 is a prior art and has been widely used, so its internal structure and working principle will not be described in detail here. The gas supply mechanism includes a low-pressure gas supply component, a medium-pressure gas supply component, a high-pressure gas supply component, an air pump 12 and a controller; the low-pressure gas supply component includes a low-pressure test component 6 and a low-pressure gas storage unit 9, and the low-pressure gas storage unit 9 is used to convey a preset amount of low-pressure gas into the test mechanism 4 at the corresponding position to complete the airtightness detection under the low-pressure state; the medium-pressure gas supply component includes a medium-pressure test component 7 and a medium-pressure gas storage unit 10, and the medium-pressure gas storage unit 10 is used to convey a preset amount of medium-pressure gas into the medium-pressure test component 7 to complete the airtightness detection under the medium-pressure state; the high-pressure gas supply component includes a high-pressure test component 8 and a high-pressure gas storage unit 11, and the high-pressure gas storage unit 11 is used to convey a preset amount of high-pressure gas into the high-pressure test component 8 to complete the airtightness detection under the high-pressure state; inside the low-pressure gas storage unit 9, the medium-pressure gas storage unit 10 and the high-pressure gas storage unit 11, there are respectively fixedly arranged pressure sensors for monitoring the air pressure inside the low-pressure gas storage unit 9, the medium-pressure gas storage unit 10 and the high-pressure gas storage unit 11 in real time. The controller controls the air pump 12 to supplement gas into the low-pressure gas storage unit 9 or the medium-pressure gas storage unit 10 or the high-pressure gas storage unit 11 according to the monitoring data of the pressure sensors.The low-pressure test component 6, the medium-pressure test component 7, and the high-pressure test component 8 are sequentially arranged on the top of the test bench 1 in the clockwise direction. The low-pressure gas storage unit 9, the medium-pressure gas storage unit 10, and the high-pressure gas storage unit 11 are fixedly arranged inside the cavity of the test bench 1, and the positions of the low-pressure gas storage unit 9, the medium-pressure gas storage unit 10, the high-pressure gas storage unit 11 and the low-pressure test component 6, the medium-pressure test component 7, the high-pressure test component 8 are arranged in one-to-one correspondence. The air pump 12 is fixedly arranged inside the cavity of the test bench 1. The low-pressure gas storage unit 9, the medium-pressure gas storage unit 10, and the high-pressure gas storage unit 11 are all connected by pipelines to the air pump 12. The air pump 12, the air pressure sensor, and the controller are all electrically connected by wires. The controller analyzes the real-time monitoring data input by the air pressure sensor and controls the air pump 12 to supplement the lost detection gas into the low-pressure gas storage unit 9 or the medium-pressure gas storage unit 10 or the high-pressure gas storage unit 11 according to the monitoring data, so as to ensure that the air pressure in the low-pressure gas storage unit 9, the medium-pressure gas storage unit 10, and the high-pressure gas storage unit 11 is in a constant state of a preset amount; it should be noted here that the low pressure, medium pressure, and high pressure are all higher than the standard atmospheric pressure value, and are only used to distinguish three different test air pressure values. The test result feedback component 5 includes a liquid storage cylinder for storing bromothymol blue solution. An electric heating rod is fixedly arranged inside the liquid storage cylinder for heating the bromothymol blue solution after the color reaction. A plurality of observation ports are evenly arranged on the side wall of the liquid storage cylinder, and transparent tempered glass is fixedly arranged inside the observation ports. A gas overflow port is arranged at the top of the cylinder body for discharging the gas entering the test result feedback component 5.

[0050] Embodiment 2: The main difference between this embodiment and the first technical solution is: a test device for testing the performance of a seal, the test mechanism 4 includes a base plate, and a loading assembly 41 and a pressing assembly 42 are respectively arranged on both sides of the top of the base plate; the loading assembly 41 includes a cylinder 411 fixedly arranged on the top of the base plate, and a plurality of avoidance grooves 412 and avoidance grooves 413 are respectively arranged in a circular array on the upper and lower positions of the outer wall of the cylinder 411, and a limit ring 414 is fixedly sleeved on the outer wall of the cylinder 411 and located between the avoidance grooves 412 and the avoidance grooves 413, and a support plate assembly for carrying the rubber ring seal to be tested is sleeved on the outer wall of the cylinder 411; the support plate assembly includes a seal placement platform 415 slidably sleeved on the outer wall of the cylinder 411, and guide columns are fixedly arranged on both sides of the bottom of the seal placement platform 415. 416, a guide column 416 slides through the limit ring 414 and extends to the outside, a spring 417 is provided on the outer wall of the guide column 416 and is located between the limit ring 414 and the seal placement platform 415, and a connecting rod 418 is fixedly provided at the bottom ends of the two guide columns 416 and located inside the avoidance groove 412; a plurality of limit blocks 419 are evenly fixedly provided on the outer wall of the cylinder 411 and below the seal placement platform 415, which are used to limit the downward movement distance of the seal placement platform 415, and a pneumatic lifting assembly for assisting the rubber ring seal to detach from the seal placement platform 415 is provided inside the cavity of the cylinder 411, and an annular groove for placing the rubber ring seal is provided on the top of the seal placement platform 415, and a plurality of air holes 4114 for cooperating with the pneumatic lifting assembly are provided in the annular groove. The pneumatic lifting assembly includes a cylinder body 4110 fixedly arranged inside the cylinder body 411 through a support arm, a piston 4111 is sealingly and slidably arranged inside the cylinder body 4110, a piston rod 4112 is fixedly arranged at the bottom of the piston 4111, the bottom end of the piston rod 4112 slides through the cylinder body 4110 and is fixedly connected to the connecting rod 418, and a gas hose 4113 is fixedly arranged on the outer wall of the cylinder body 4110 and above the piston 4111, and the end of the gas hose 4113 away from the cylinder body 4110 is connected to the interior of the sealing member placement platform 415. A plurality of through holes are evenly arranged at the bottom of the second cylinder 4110 for facilitating the gas flow when the piston 4111 moves; the interior of the sealing member placing platform 415 is a hollow structure, and when the piston 4111 moves upward to the extreme position, its top always maintains a certain distance from the top of the inner cavity of the second cylinder 4110 to form a constant cavity, and one end of the gas supply hose 4113 is located in the constant cavity, and is used to input the gas pushed out when the piston 4111 moves upward into the cavity of the sealing member placing platform 415 through the gas supply hose 4113; the gas supply hose 4113 passes through the second avoidance groove 413 and can move up and down along the internal space of the second avoidance groove 413.The pressing assembly 42 includes a support frame 421 fixedly arranged on the bottom plate and an avoidance through groove three 422 formed on the side wall of the support frame 421. Sliding rails are fixedly arranged on both sides of the side wall of the support frame 421 close to the loading assembly 41. A lifting frame 423 is slidably sleeved on the outer walls of the two sliding rails. A limiting plate 427 is fixedly arranged on the side wall of the support frame 421 and below the lifting frame 423. A guide post two 428 is fixedly arranged at the bottom of the lifting frame 423. The guide post two 428 slidably penetrates through the limiting plate 427 and extends to the outside. A spring two 429 is slidably sleeved on the outer wall of the guide post two 428 between the limiting plate 427 and the lifting frame 423. A sealing plate assembly for pressing the rubber ring seal and jointly forming a closed space with the seal placement table 415 is arranged at the bottom of the lifting frame 423. A detection gas receiving assembly for quantitatively conveying detection gas into its interior is arranged at the top of the sealing plate assembly; the inner diameter of the sealing sleeve 425 is adapted to the outer diameter of the seal placement table 415. When the cover plate 424 presses on the top of the rubber ring seal located in the annular groove, the rubber ring seal to be detected undergoes a certain degree of elastic deformation under pressure. At this time, the sealing sleeve 425 is hermetically slidably sleeved on the outer wall of the seal placement table 415, and the inwardly concave part of the inner wall of the sealing sleeve 425 is located above the top of the seal placement table 415. This part of the area is used for when the rubber ring seal is damaged or detection gas leaks due to other reasons, after the leaked gas passes through the rubber ring seal, it then enters the test result feedback assembly 5 through the leakage gas output pipe 426 on the inner wall of the sealing sleeve 425. The sealing plate assembly includes a cover plate 424 fixedly arranged at the bottom of the lifting frame 423 and a sealing sleeve 425 fixedly sleeved on the outer wall of the cover plate 424. A leakage gas output pipe 426 is fixedly arranged on the side wall of the sealing sleeve 425. The leakage gas output pipe 426 penetrates through the avoidance through groove three 422 and is connected to the test result feedback assembly 5. Both ends of the leakage gas output pipe 426 are respectively communicated with both ends of the sealing sleeve 425 and the test result feedback assembly 5. The detection gas receiving assembly includes a gas nozzle 4210 fixedly arranged on the top of the cover plate 424. One end of the gas nozzle 4210 penetrates through the cover plate 424 and is communicated with its interior. A trigger rod 4211 is fixedly arranged at the bottom of the gas nozzle 4210.

[0051] Embodiment 3: The main difference between this embodiment and the second technical solution lies in: a test device for testing the performance of a seal. The structures of the low-pressure test assembly 6, the medium-pressure test assembly 7, and the high-pressure test assembly 8 are the same. The low-pressure test assembly 6 includes a first mounting frame 61 fixedly arranged on the top of the test bench 1. A gas supply pipe 62 is fixedly arranged on the top of the first mounting frame 61. One end of the gas supply pipe 62 is fixedly provided with an arc-shaped plate 63. An arc-shaped groove 64 is formed on the side wall of the arc-shaped plate 63. An air hole 65 communicating with the gas supply pipe 62 is formed inside the arc-shaped groove 64. A touch switch 66 is fixedly arranged on the side wall of the arc-shaped plate 63 for cooperating with the trigger rod 4211 and controlling the opening or closing of the air hole 65. When the nozzle 4210 meets the arc-shaped plate 63 during rotation, the nozzle 4210 slides sealingly along the inner wall of the arc-shaped groove 64 and communicates with the air hole 65 at a preset time node. When the air hole 65 communicates with the nozzle 4210, the trigger rod 4211 meets the touch switch 66 and touches the touch switch 66. The end of the gas supply pipe 62 away from the arc-shaped plate 63 is connected to the low-pressure gas storage unit 9. Similarly, the gas supply pipes 62 in the medium-pressure test assembly 7 and the high-pressure test assembly 8 are respectively connected to the medium-pressure gas storage unit 10 and the high-pressure gas storage unit 11.

[0052] Embodiment 4: The main difference between this embodiment and the third technical solution lies in: a test device for testing the performance of a seal. The test drive assembly 13 includes two second mounting frames 131 fixedly arranged on both sides of the top of the test bench 1. A base 132 is fixedly arranged between the two second mounting frames 131. An arc-shaped drive block 133 for pushing the lifting frame 423 to move downward is fixedly arranged at the bottom of the base 132. Both ends of the lifting frame 423 are provided with inclined planes. The height of the arc-shaped drive block 133 is set such that when the lifting frame 423 meets one end of the arc-shaped drive block 133, the lifting frame 423 climbs along the inclined plane at the bottom end of the arc-shaped drive block 133. During the climbing process, the cover plate 424 is subjected to a downward thrust, and its bottom presses tightly on the top of the seal placement table 415. The rubber sealing ring to be tested is pressed tightly in the closed space between the cover plate 424 and the seal placement table 415. And the cover plate 424 continues to move downward, driving the seal placement table 415 to move downward together until the bottom of the seal placement table 415 abuts against the limit block 419, and the climbing process ends.

[0053] The embodiment of the present invention also provides a test method for testing the performance of a seal for a test device for testing the performance of a seal, which specifically includes the following steps:

[0054] Step 1: The rubber seal to be detected is conveyed towards the test turntable 3 through the seal conveyor belt 2 in sequence. The servo motor drives the test turntable 3 to rotate intermittently in the clockwise direction. The staff manually places the rubber seals in the test mechanism 4 passing in front of them during the intermittent rotation of the test turntable 3. The specific process is as follows: The rubber seals to be detected are evenly placed on the top of the seal conveyor belt 2 and conveyed towards the test turntable 3. The servo motor drives the test turntable 3 to rotate intermittently at a low speed. The staff takes the rubber seal close to the test turntable 3 and places it in the annular groove on the top of the seal placement table 415 through the gap between the seal placement table 415 and the cover plate 424 in each test mechanism 4 during the intermittent rotation of the test turntable 3. The air hole 4114 is pressed under the rubber seal, and the top of the rubber seal protrudes from the annular groove.

[0055] Step 2: When the test mechanism 4 loaded with the rubber seal ring meets the test drive assembly 13, the test drive assembly 13 drives the test mechanism 4 to perform a closing action to seal its internal space, and then it passes through the low-pressure test assembly 6, the medium-pressure test assembly 7, and the high-pressure test assembly 8 in sequence. Each time it reaches the detection position of the low-pressure test assembly 6 or the medium-pressure test assembly 7 or the high-pressure test assembly 8, it intermittently pauses for a preset time. The low-pressure gas storage unit 9, the medium-pressure gas storage unit 10, and the high-pressure gas storage unit 11 quantitatively convey the carbon dioxide detection gas to the low-pressure test assembly 6, the medium-pressure test assembly 7, and the high-pressure test assembly 8 at the corresponding positions. The low-pressure test assembly 6, the medium-pressure test assembly 7, and the high-pressure test assembly 8 then input the carbon dioxide detection gas into the test mechanism 4 at the corresponding positions.

[0056] The specific process is as follows: When the test mechanism 4 loaded with the rubber ring seal to be detected rotates clockwise to a position close to the test drive assembly 13, the top of the lifting frame 423 meets the ramp surface at one end of the arc drive block 133 and climbs along this ramp surface. During the climbing process: The lifting frame 423 is gradually pushed downward, the second guide post 428 moves downward synchronously, the second spring 429 is compressed and undergoes elastic deformation, and the leakage gas output pipe 426 moves downward along the avoidance through groove three 422 until the bottom of the cover plate 424 abuts against the top of the seal placement table 415. At the same time, after the seal sleeve 425 is sleeved on the outer wall of the seal placement table 415 and seals and slides downward for a certain distance, it is blocked by the limit ring fixedly arranged on the side wall of the seal placement table 415 and cannot move downward. At this time, the annular groove recessed inward on the inner wall of the seal sleeve 425 is located above the top of the seal placement table 415. At this time, the cover plate 424 and the seal placement table 415 move downward synchronously until the bottom of the seal placement table 415 abuts against the top of the limit block 419. At this time, the top of the seal placement table 415 is just at the same horizontal plane as the top of the first cylinder 411, and the climbing process of the lifting frame 423 along the ramp surface of the arc drive block 133 ends. At this time, the rubber ring seal in the annular groove is simultaneously elastically deformed by the extrusion of the relative inner walls of the cover plate 424 and the seal placement table 415, and the seal sleeve 425 covers the joint between the cover plate 424 and the seal placement table 415, making this joint in the sealed environment created by the seal sleeve 425;

[0057] When the seal placement table 415 moves downward along the outer wall of the first cylinder 411, the two first guide posts 416 move downward synchronously, the connecting rod 418 pulls the piston rod 4112 downward, and the piston 4111 moves downward synchronously with the piston rod 4112. The space above the piston 4111 forms a negative pressure state, and the first air hole 4114 firmly adsorbs the rubber ring seal in the annular groove;

[0058] Step 3: When the test mechanism 4 reaches the detection position of the low-pressure test assembly 6, observe the color change of the bromothymol blue solution inside the test result feedback assembly 5. If the bromothymol blue solution turns red, the rubber ring seal is unqualified in terms of sealing performance. If the bromothymol blue solution has no obvious color change, the rubber ring seal is qualified; After the intermittent preset time ends, continue to rotate, and this test mechanism 4 successively enters the detection positions of the medium-pressure test assembly 7 and the high-pressure test assembly 8. The detection process is the same as the detection operation when entering the position of the low-pressure test assembly 6, and the airtightness of the rubber ring is successively detected under medium pressure and high pressure.

[0059] The specific process is as follows: When the testing mechanism 4 continues to rotate, the air nozzle 4210 enters the arc-shaped groove 64 and slides sealingly along the inner wall of the arc-shaped groove 64. When the second air hole 65 and the air nozzle 4210 are opposite to each other, the air nozzle 4210 communicates with the second air hole 65. The servo motor pauses for twenty seconds. At the same time, the trigger rod 4211 meets and triggers the touch switch 66. The touch switch 66 controls the solenoid valve inside the second air hole 65 to open. The low-pressure carbon dioxide gas stored in the low-pressure gas storage unit 9 enters the air nozzle 4210 through the air supply pipe 62 and the second air hole 65, and gradually enters the enclosed space composed of the cover plate 424, the seal placement table 415 and the rubber sealing ring. After the pressure sensor located inside the low-pressure gas storage unit 9 detects the pressure loss, it sends a pressure loss signal to the controller. The controller controls the air pump 12 to pump the carbon dioxide gas from the external carbon dioxide gas cylinder into the low-pressure gas storage unit 9 to supplement the lost carbon dioxide gas until the pressure of the low-pressure carbon dioxide gas in this space is the same as that of the carbon dioxide gas in the low-pressure gas storage unit 9; When the rubber ring seal during the test is damaged or has air holes inside, the filled carbon dioxide gas passes through the rubber ring seal and enters the enclosed space composed of the seal sleeve 425, the cover plate 424 and the seal placement table 415, and is transported to the test result feedback component 5 through the leakage gas output pipe 426. The carbon dioxide reacts with the water in the bromothymol blue solution in the test result feedback component 5 to form carbonic acid. The carbonic acid reacts with the bromothymol blue solution to change color from blue to red. The color change can be observed through the transparent observation window on the outer wall of the test result feedback component 5, indicating that the currently tested rubber ring seal is a non-conforming product. Then, the testing mechanism 4 carrying this non-conforming rubber ring seal passes through the medium-pressure testing component 7 and the high-pressure testing component 8 in sequence, and then the servo motor is turned off. The heating rod inside the test result feedback component 5 is powered on to heat the bromothymol blue solution inside it. After the carbonic acid in the bromothymol blue solution decomposes due to heating, the bromothymol blue solution returns to blue again. The detection process of the testing mechanism 4 passing through the medium-pressure testing component 7 and the high-pressure testing component 8 is the same as that passing through the low-pressure testing component 6, which will not be elaborated here. The only difference is that the gas pressures output by the medium-pressure testing component 7 and the high-pressure testing component 8 to 4 increase sequentially;

[0060] When the testing mechanism 4 continues to rotate and moves away from the arc-shaped driving block 133, since the lifting frame 423 loses the push of the arc-shaped driving block 133, it moves upward under the elastic force of the second spring 429 and returns to its original position. The seal placing table 415 moves upward synchronously under the elastic force of the first spring 417. When the piston 4111 moves upward, it squeezes the air inside the second cylinder 4110, and the air is discharged through the air delivery hose 4113 and the first air hole 4114. The discharged air pushes the rubber ring seal located in the annular groove upward, separating it from the annular groove. The staff can take out the rubber ring seal after detection, mark the unqualified rubber ring seals, and store them separately.

[0061] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0062] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for testing the performance of a seal, comprising a test bench and a seal conveyor belt arranged on the top of the test bench, characterized in that: A turntable mechanism for conveying the seal to be tested to the test position is arranged on one side of the top of the test bench, and the turntable mechanism includes a servo motor fixedly arranged at the bottom of the test bench, and the output shaft of the servo motor rotates through the test bench and is fixedly provided with a test turntable, and a plurality of test mechanisms for carrying rubber sealing rings and testing their sealing properties are evenly arranged on the top of the test turntable, and a test result feedback component for observing the sealing test results is fixedly arranged at the center position of the top of the test turntable, and a gas supply mechanism for providing test gas with different pressure values ​​to the test mechanism is arranged on the top of the test bench and on one side of the test turntable, and a test drive component for driving the test mechanism to complete the closing action and press the seal to be tested in the closed space is also arranged on the top of the test bench; The testing mechanism comprises a bottom plate, and two sides of the top of the bottom plate are respectively provided with a loading assembly and a pressing assembly; The loading assembly comprises a cylinder body 1 fixedly arranged on the top of the bottom plate, a plurality of avoidance grooves 1 and 2 are respectively provided in a circular array on the upper and lower positions of the outer wall of the cylinder body 1, a limit ring is fixedly sleeved on the outer wall of the cylinder body 1 and located between the avoidance grooves 1 and 2, and a support plate assembly for carrying the rubber ring seal to be tested is sleeved on the outer wall of the cylinder body 1; The support plate assembly includes a sealing member placing platform slidably sleeved on the outer wall of the cylinder, and guide pillars are fixedly arranged on both sides of the bottom of the sealing member placing platform. The guide pillars slide through the limiting ring and extend to the outside. A spring is slidably sleeved on the outer wall of the guide pillar and located between the limiting ring and the sealing member placing platform. A connecting rod is fixedly arranged at the bottom ends of the two guide pillars and located inside the avoidance groove. A plurality of limit blocks are evenly and fixedly arranged on the outer wall of the cylinder body 1 and below the seal placement platform, which are used to limit the downward movement distance of the seal placement platform. A pneumatic lifting assembly for assisting the rubber ring seal to separate from the seal placement platform is arranged inside the cavity of the cylinder body 1. An annular groove for placing the rubber ring seal is provided on the top of the seal placement platform, and a plurality of air holes 1 for cooperating with the pneumatic lifting assembly are provided in the annular groove; By setting up an air pressure lifting assembly in the loading assembly, the piston can be driven to move downward synchronously during the downward movement of the sealing placement table. When the piston moves downward, the air around the air hole one is sucked to form a negative pressure environment around the air hole one, so that the rubber sealing ring to be tested set on the top of the air hole one can be stably adsorbed to prevent its position from shifting.

2. A test device for testing seal performance according to claim 1, characterized in that: The gas supply mechanism includes a low-pressure gas supply component, a medium-pressure gas supply component, a high-pressure gas supply component, an air pump and a controller; The low-pressure gas supply assembly includes a low-pressure test assembly and a low-pressure gas storage unit, and the low-pressure gas storage unit is used to transport a preset amount of low-pressure gas to the test mechanism at the corresponding position to complete the air-tightness test under the low-pressure state; the medium-pressure gas supply assembly includes a medium-pressure test assembly and a medium-pressure gas storage unit, and the medium-pressure gas storage unit is used to transport a preset amount of medium-pressure gas to the medium-pressure test assembly to complete the air-tightness test under the medium-pressure state; the high-pressure gas supply assembly includes a high-pressure test assembly and a high-pressure gas storage unit, and the high-pressure gas storage unit is used to transport a preset amount of high-pressure gas to the high-pressure test assembly to complete the air-tightness test under the high-pressure state; the low-pressure gas storage unit, the medium-pressure gas storage unit and the high-pressure gas storage unit are all fixedly provided with air pressure sensors for real-time monitoring of the air pressure in the low-pressure gas storage unit, the medium-pressure gas storage unit and the high-pressure gas storage unit respectively, and the controller controls the air pump to replenish gas into the low-pressure gas storage unit or the medium-pressure gas storage unit or the high-pressure gas storage unit according to the monitoring data of the air pressure sensor.

3. A test device for testing seal performance according to claim 1, characterized in that: The test result feedback component includes a liquid storage cylinder for storing bromothymol blue solution, an electric heating rod is fixedly arranged inside the liquid storage cylinder for heating the bromothymol blue solution after the color development reaction, and a plurality of observation ports are evenly opened on the side wall of the liquid storage cylinder, and transparent tempered glass is fixedly arranged inside the observation ports.

4. A test device for testing seal performance according to claim 1, characterized in that: The pneumatic lifting assembly includes a cylinder body 2 fixedly arranged inside the cylinder body 1 through a support arm, a piston is sealingly and slidably arranged inside the cylinder body 2, a piston rod is fixedly arranged at the bottom of the piston, the bottom end of the piston rod slides through the cylinder body 2 and is fixedly connected to the connecting rod, an air supply hose is fixedly arranged on the outer wall of the cylinder body 2 and above the piston, and the end of the air supply hose away from the cylinder body 2 is connected to the inside of the sealing member placement platform.

5. A test device for testing seal performance according to claim 1, characterized in that: The pressing assembly includes a support frame fixedly arranged on the bottom plate and an avoidance slot three opened on the side wall of the support frame, slide rails are fixedly arranged on both sides of the side wall of the support frame close to the loading assembly, and a lifting frame is slidably sleeved on the outer walls of the two slide rails, a limiting plate is fixedly arranged on the side wall of the support frame and below the lifting frame, a guide column two is fixedly arranged on the bottom of the lifting frame, the guide column two slides through the limiting plate and extends to the outside, a spring two is slidably sleeved on the outer wall of the guide column two and between the limiting plate and the lifting frame, a sealing plate assembly for pressing a rubber ring seal and forming a closed space together with a sealing plate placement table is arranged at the bottom of the lifting frame, and a detection gas receiving assembly for quantitatively delivering detection gas to the inside thereof is arranged on the top of the sealing plate assembly; The sealing plate assembly includes a cover plate fixedly arranged at the bottom of the lifting frame and a sealing sleeve fixedly sleeved on the outer wall of the cover plate, a leakage gas output pipe is fixedly arranged on the side wall of the sealing sleeve, and the leakage gas output pipe passes through the third avoidance groove and is connected to the test result feedback assembly.

6. A test device for testing the performance of a seal according to claim 5, characterized in that: The detection gas receiving assembly includes a gas nozzle fixedly arranged on the top of the cover plate, one end of the gas nozzle penetrates the cover plate and is connected with the inside thereof, and a trigger rod is fixedly arranged at the bottom of the gas nozzle.

7. A test device for testing seal performance according to claim 2, characterized in that: The low-pressure test assembly, medium-pressure test assembly and high-pressure test assembly have the same structure. The low-pressure test assembly includes a mounting frame 1 fixedly arranged on the top of the test bench, an air supply pipe is fixedly arranged on the top of the mounting frame 1, an arc-shaped plate is fixedly arranged at one end of the air supply pipe, an arc-shaped groove is provided on the side wall of the arc-shaped plate, an air hole 2 connected to the air supply pipe is provided inside the arc-shaped groove, and a touch switch for controlling the opening or closing of the air hole 2 is fixedly arranged on the side wall of the arc-shaped plate.

8. A test device for testing the performance of a seal according to claim 5, characterized in that: The test drive assembly includes two mounting frames 2 fixedly arranged on both sides of the top of the test bench, a base is fixedly arranged between the two mounting frames 2, an arc-shaped driving block for pushing the lifting frame downward is fixedly arranged at the bottom of the base, and both ends of the lifting frame are provided with inclined surfaces.

9. A test method for testing the performance of a seal, characterized in that: The test device for testing the performance of the seal as claimed in claim 2 specifically comprises the following steps: Step 1: The rubber ring seals to be tested are transported to the test turntable in sequence through the seal conveyor belt. The servo motor drives the test turntable to rotate intermittently clockwise. The staff uses the intermittent time of the test turntable to manually place the rubber ring seals in the test mechanism passing in front of it in sequence; Step 2: When the test mechanism loaded with the rubber sealing ring meets the test drive assembly, the test drive assembly drives the test mechanism to close and seal its internal space, and then passes through the low-pressure test assembly, the medium-pressure test assembly and the high-pressure test assembly in sequence. Each time when the low-pressure test assembly, the medium-pressure test assembly or the high-pressure test assembly is reached, a preset time is intermittently performed, and the low-pressure gas storage unit, the medium-pressure gas storage unit and the high-pressure gas storage unit quantitatively deliver carbon dioxide detection gas to the low-pressure test assembly, the medium-pressure test assembly and the high-pressure test assembly at the corresponding positions, and the low-pressure test assembly, the medium-pressure test assembly and the high-pressure test assembly then input the carbon dioxide detection gas into the test mechanism at the corresponding position; Step 3. When the test mechanism reaches the detection position of the low-pressure test assembly, observe the color change of the bromothymol blue solution inside the test result feedback assembly. If the bromothymol blue solution turns red, the sealing of the rubber ring seal is unqualified. If there is no obvious color change of the bromothymol blue solution, the rubber ring seal is qualified. After the preset interval time, the test mechanism continues to rotate, and the test mechanism enters the detection position of the medium-pressure test assembly and the high-pressure test assembly in turn. The detection process is the same as the detection operation of entering the low-pressure test assembly position, and the rubber ring is tested for air tightness under medium-pressure and high-pressure rings in turn.

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