A rubber sealing ring tensile resistance test chamber and its working method

Abstract

The present invention is used in the technical field of rubber sealing ring tensile test, and discloses a rubber sealing ring tensile test box, including an outer box, one side of the outer surface of the outer box is fixedly provided with a sealing glass, and one side of the outer surface of the outer box is designed to be open, and a sealing plate is fixedly installed on the side of the outer box with an open design by bolts, and a stretching mechanism is provided inside the outer box, and the sealing performance of the sealing ring is tested by resetting the stretching assembly after the stretching is completed. The rubber sealing ring tensile test box adopts a method of separating the stretching tube to all sides to achieve the tensile test of the rubber sealing ring, so that the force at various places of the rubber sealing ring is relatively uniform, avoiding the influence of different force positions on the tensile test data of the rubber sealing ring, ensuring the consistency of the test process, and ensuring the timeliness of the sealing performance test of the rubber sealing ring by alternating the opening and closing of the stretching tube.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber seal ring tensile resistance tests, and specifically relates to a rubber seal ring tensile resistance test chamber and its working method. Background Technique

[0002] As a sealing element widely used in the industrial field, the performance of rubber seal rings directly affects the sealing effect and operation stability of equipment. In practical applications, rubber seal rings need to withstand different degrees of tensile stress. Therefore, their tensile resistance performance is one of the important indicators to measure their quality and reliability. With the continuous development of industrial technology, the performance requirements for rubber seal rings are also getting higher and higher. Traditional testing methods for the tensile resistance performance of rubber seal rings often have many limitations and cannot accurately and comprehensively evaluate the tensile resistance performance of seal rings under complex working conditions. For example, some simple manual tensile testing equipment is not only cumbersome and inefficient to operate, but also difficult to ensure the accuracy and repeatability of test results. To meet the increasingly stringent industrial application requirements, it has become an urgent task to develop an advanced, efficient, and accurate rubber seal ring tensile resistance test chamber. In recent years, although some tensile testing equipment with a relatively high degree of automation has emerged, there are still some deficiencies. For example, the tensile speed control of some test chambers is not precise enough, resulting in large errors in test results. The loading methods of some test chambers are unreasonable, easily causing uneven stress on the rubber seal ring during the test and affecting the reliability of test results. In addition, the environmental simulation function of some test chambers is not perfect enough to truly reproduce various complex conditions in the actual working environment. Moreover, there are also certain defects in the data acquisition and processing of existing rubber seal ring tensile resistance test chambers. The data acquisition frequency of some test chambers is relatively low, unable to capture the instantaneous changes in the sealing performance of rubber seal rings during multiple tensile processes, resulting in a certain delay in the determination of the tensile resistance performance of rubber seal rings and being unable to accurately and timely monitor and feedback the failure of rubber seal rings. Summary of the Invention

[0003] The purpose of the present invention is to provide a rubber seal ring tensile resistance test chamber and its working method to solve the problem of being unable to timely monitor and feedback the failure of rubber seal rings proposed in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A rubber seal ring tensile resistance test chamber, including an outer box body. One outer surface of the outer box body is fixedly provided with a sealed glass, and one outer surface of the outer box body is designed with an opening. And the side with the opening design of the outer box body is fixedly installed with a sealing plate through bolts. A storage battery is arranged inside the outer box body. A stretching mechanism is arranged inside the outer box body, and the sealing performance of the seal ring is detected by the reset movement of the stretching component after stretching is completed.

[0005] Preferably, the stretching mechanism includes: a stretching tube, which is slidably installed on the inner bottom surface of the outer box body, and a rotating displacement rod is installed on the inner bottom surface of the outer box body. One end of the displacement rod is fixedly connected with an adjusting gear. Above the adjusting gear, there is a connecting ring, and a driving ring is fixedly arranged above the connecting ring. The driving ring is rotatably connected with the outer box body. A driving motor is fixedly installed inside the upper end of the outer box body, and the lower end of the output shaft of the driving motor is fixedly connected with a driving gear. A sealing ring is sleeved on the upper end of the stretching tube, and the lower end of the stretching tube is attached to the inner bottom surface of the outer box body.

[0006] With the above technical solution, the stretching tube can realize the stretching detection of the rubber sealing ring by a separating method.

[0007] Preferably, the stretching mechanism further includes: a functional disk, which is slidably installed inside the outer box body. A threaded column is fixedly installed on the upper surface of the functional disk, and an electric push rod is fixedly installed on the upper surface of the functional disk. The lower end of the electric push rod is fixedly connected with a pressurizing column, and a sliding contact cylinder is installed at the lower end of the pressurizing column. A pressure chamber is opened inside the upper end of the pressurizing column, and an air outlet is opened on the inner bottom surface of the pressure chamber. A sliding closing block is installed inside the pressurizing column below the pressure chamber, and a pressure guiding tube is opened inside the side surface of the pressurizing column on one side of the closing block. A first one-way valve is fixedly installed on the side surface of the pressurizing column on one side of the pressure chamber, and one end of the first one-way valve is fixedly connected with a sliding tube. A sliding connecting tube is installed at the upper end of the sliding tube. A pressurizing box is fixedly arranged on the upper surface of the functional disk, and a piston plate is slidably installed inside the pressurizing box. One end side surface of the piston plate is fixedly provided with an extrusion rod. A second one-way valve is fixedly installed on the upper surface of one end of the pressurizing box. An extrusion block is fixedly arranged on the lower end side surface of the driving ring. A pressure sensor, a warning lamp and a pressure regulating joint are fixedly installed on the upper surface of the outer box body.

[0008] With the above technical solution, the rubber sealing ring can immediately perform a sealing detection to verify the tensile resistance performance after undergoing a tensile test.

[0009] Preferably, the side surfaces of adjacent stretching tubes are attached to each other. The stretching tubes are arc-shaped and concentrically designed. The displacement rod and the adjusting gear are concentrically designed, and the displacement rod is threadedly connected with the stretching tube.

[0010] With the above technical solution, the stretching tubes can be driven to open to perform an anti-tensile test on the rubber sealing ring.

[0011] Preferably, the lower surface of the connecting ring is fixedly provided with tooth blocks, and the connecting ring is meshed with the adjusting gear through the tooth blocks on the lower surface. The connecting ring and the driving ring are concentrically arranged, and the driving ring is meshed with the driving gear.

[0012] By adopting the above technical solution, the driving gear can drive the driving ring and the connecting ring to rotate synchronously.

[0013] Preferably, the threaded column is threadedly connected to the drive ring, and the threaded column is hollow in design, and the lower end of the threaded column is C-shaped opening design, and the threaded column and the electric push rod are concentric in design.

[0014] By adopting the above technical solution, the electric push rod can be connected to the battery inside the outer box through the gap of the threaded column.

[0015] Preferably, the pressurizing column and the contact cylinder are connected by sliding friction, and a spring is connected between the pressurizing column and the contact cylinder. The inner cavity of the pressurizing column where the upper end of the contact cylinder is located is connected to the pressure chamber through a pressure-conducting tube.

[0016] By adopting the above technical solution, the contact cylinder can press the air into the pressure chamber.

[0017] Preferably, the upper surface of the closing block fits with one end of the air outlet, and a spring is connected between the closing block and the pressurizing column, and one end of the closing block is located inside the pressure pipe, and the end of the closing block located inside the pressure pipe is connected to the pressure pipe by sliding friction.

[0018] By adopting the above technical solution, the sealing block can be pushed under the action of the internal pressure of the pressure-guiding tube to release the sealing of the air outlet.

[0019] Preferably, the upper end of the connecting tube passes through the lower surface of one end of the pressurizing box, the pressurizing box and the piston plate are connected by sliding friction, and a spring is connected between the piston plate and the pressurizing box, one end of the extrusion rod passes through the outer surface of the pressurizing box, and the end of the extrusion rod located outside the pressurizing box is hemispherical in design, and one end of the hemispherical design of the extrusion rod is fitted with the outer surface of the extrusion block, the extrusion block is a right-angled trapezoidal design, and the inclined surface of the extrusion block is fitted with one end of the hemispherical design of the extrusion rod.

[0020] By adopting the above technical solution, the function disk can automatically pressurize the pressure chamber when sliding down, thereby providing a pressure basis for the subsequent sealing type detection of the rubber sealing ring.

[0021] A working method of a rubber sealing ring tensile test box, the working method comprising the following steps:

[0022] S1. Open the sealing plate and place the rubber sealing ring to be tested on the upper end of the stretch tube;

[0023] S2. Start the drive motor to make the functional disk slide upward as a whole so that the stretch tube is opened to perform the stretch test;

[0024] S3. Start the drive motor to make the entire functional disk slide down, closing the stretching tube and waiting for seal detection;

[0025] S4. Conduct the pressure to the rubber sealing ring to be detected at the connection between the contact cylinder and the stretching tube;

[0026] S5. Monitor the pressure change inside the outer box through a pressure sensor;

[0027] S6. Observe whether the warning light is lit to judge the sealing condition of the rubber sealing ring to be detected;

[0028] S7. After the test is completed, open the sealing plate to replace the rubber sealing ring to be detected.

[0029] Compared with the prior art, the beneficial effects of the present invention are: This rubber sealing ring tensile test box:

[0030] 1. Adopt the method of separating the stretching tube in all directions to realize the tensile test of the rubber sealing ring, so that the stress on each part of the rubber sealing ring is relatively uniform, avoiding the influence of different stress positions on the tensile test data of the rubber sealing ring, and ensuring the consistency of the detection process;

[0031] Further, adopt the method of closing the stretching tube after it is opened, so that the stretching tube can form a relatively closed pipeline with the inner bottom surface of the outer box, so that the contact cylinder can be connected to the stretching tube by pressing down, and the sealing performance of the rubber sealing ring can be detected by pressurizing the connection between the contact cylinder and the stretching tube. By alternately opening and closing the stretching tube, the timeliness of the sealing performance detection of the rubber sealing ring is ensured;

[0032] 2. Adopt the method of overall sealing of the outer box, so that the pressure sensor can monitor the pressure change inside the outer box during the detection process, thereby realizing the monitoring of the sealing performance of the rubber sealing ring. The warning light can warn the staff when the pressure index changes preset, so as to facilitate the staff to record the data in time;

[0033] Further, by the way that the extrusion rod contacts one end of the extrusion block during the downward movement of the functional disk, when the pressurizing column is driven to slide downward and reset, it can automatically pressurize the inside of the pressure chamber without external pressure supply, so that it is not necessary to level the pressure inside the outer box every time a test is performed, ensuring the consistency of the detection environment for the rubber sealing ring;

[0034] Furthermore, through the closing of the air outlet by the closing block during the downward sliding of the pressurizing column and the pressurization of the pressure guiding tube when the contact cylinder contacts the stretching tube, the air outlet can automatically release the pressure after the contact between the contact cylinder and the stretching tube is stable, so as to achieve the purpose of automatically detecting the sealing performance of the rubber sealing ring. Description of the Drawings

[0035] Figure 1 Schematic diagram of the overall three-dimensional structure of the present invention;

[0036] Figure 2 Schematic diagram of the overall three-dimensional structure of the sectional plane of the present invention;

[0037] Figure 3 Schematic diagram of the three-dimensional structure of the sectional plane of the connection between the function disk and the threaded column of the present invention;

[0038] Figure 4 Schematic diagram of the three-dimensional structure of the connection between the function disk, the threaded column and the electric push rod of the present invention;

[0039] Figure 5 Schematic diagram of the three-dimensional structure of the sectional plane of the connection between the pressure column and the contact cylinder of the present invention;

[0040] Figure 6 Schematic diagram of the three-dimensional structure of the sectional plane of the connection between the drive ring and the drive gear of the present invention;

[0041] Figure 7 Schematic diagram of the three-dimensional structure of the sectional plane of the connection between the outer box body and the drive ring of the present invention;

[0042] Figure 8 Schematic diagram of the three-dimensional structure of the connection between the stretching tube and the displacement rod of the present invention;

[0043] Figure 9 Schematic diagram of the three-dimensional structure of the connection between the pressure column and the contact cylinder of the present invention;

[0044] Figure 10 Schematic diagram of the three-dimensional structure of the overall working state of the present invention.

[0045] In the figure: 1. Outer box body; 2. Sealed glass; 3. Sealing plate; 4. Stretching tube; 5. Displacement rod; 6. Adjusting gear; 7. Connecting ring; 8. Drive ring; 9. Drive motor; 10. Drive gear; 11. Function disk; 12. Threaded column; 13. Electric push rod; 14. Pressure column; 15. Contact cylinder; 16. Pressure chamber; 17. Air outlet; 18. Sealing block; 19. Pressure guiding tube; 20. First one-way valve; 21. Sliding tube; 22. Connecting tube; 23. Pressurizing box; 24. Piston plate; 25. Extrusion rod; 26. Second one-way valve; 27. Extrusion block; 28. Pressure sensor; 29. Warning lamp; 30. Pressure regulating joint. Detailed implementation manners

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] Please refer to Figures 1 - 10 , the present invention provides a technical solution: a tensile test box for rubber sealing rings.

[0048] Embodiment 1: In this embodiment, an outer box body 1 is disclosed. A sealing glass 2 is fixedly arranged on the outer surface of one side of the outer box body 1, and the outer surface of one side of the outer box body 1 is designed to be open. And a sealing plate 3 is fixedly installed on the open side of the outer box body 1 through bolts. A storage battery is arranged inside the outer box body 1, and a stretching mechanism is arranged inside the outer box body 1. After stretching is completed, the reset movement of the stretching assembly is used to detect the sealing performance of the sealing ring;

[0049] The stretching mechanism includes: a stretching tube 4. The stretching tube 4 is slidably installed on the inner bottom surface of the outer box body 1. And a rotating displacement rod 5 is installed on the inner bottom surface of the outer box body 1. And one end of the displacement rod 5 is fixedly connected with an adjusting gear 6. Above the adjusting gear 6 is arranged a connecting ring 7. And a driving ring 8 is fixedly arranged above the connecting ring 7. And the driving ring 8 is rotatably connected with the outer box body 1. A driving motor 9 is fixedly installed inside the upper end of the outer box body 1. And the lower end of the output shaft of the driving motor 9 is fixedly connected with a driving gear 10. A sealing ring is sleeved on the upper end of the stretching tube 4. And the lower end of the stretching tube 4 is in contact with the inner bottom surface of the outer box body 1;

[0050] The side surfaces of adjacent stretching tubes 4 are in contact with each other. And the stretching tube 4 is arc-shaped and concentrically designed. The displacement rod 5 and the adjusting gear 6 are concentrically designed. And the displacement rod 5 is threadedly connected with the stretching tube 4;

[0051] The lower surface of the connecting ring 7 is fixedly provided with teeth. And the connecting ring 7 is meshed with the adjusting gear 6 through the teeth on the lower surface. And the connecting ring 7 and the driving ring 8 are concentrically arranged. The driving ring 8 is meshed with the driving gear 10;

[0052] In use, first remove the sealing plate 3 by removing the bolts. Then, through the opening of the outer box body 1 exposed after removing the sealing plate 3, the rubber sealing ring to be tested is sleeved on the upper end of the stretching tube 4. Then, the sealing plate 3 is installed on the outer box body 1 through bolts to complete the enclosure of the outer box body 1. At this time, start the driving motor 9 to drive the driving gear 10 to rotate. The driving gear 10 drives the connecting ring 7 to rotate through the meshing connection with the driving ring 8. The connecting ring 7 drives the adjusting gear 6 and the displacement rod 5 to rotate through the meshing connection with the adjusting gear 6. The displacement rod 5 drives the stretching tube 4 to slide outward and separate through the threaded connection with the stretching tube 4 to stretch the rubber sealing ring for tensile resistance testing. The stretching amplitude of the rubber sealing ring is proportional to the rotation amplitude of the connecting ring 7. During the process, observe whether the rubber sealing ring to be tested is damaged through the sealing glass 2.

[0053] Embodiment 2: On the basis of Embodiment 1, this embodiment discloses that the stretching mechanism further includes: a functional disk 11, which is slidably installed inside the outer box body 1. A threaded column 12 is fixedly installed on the upper surface of the functional disk 11. An electric push rod 13 is fixedly installed on the upper surface of the functional disk 11. The lower end of the electric push rod 13 is fixedly connected to a pressurizing column 14. A sliding contact cylinder 15 is installed at the lower end of the pressurizing column 14. A pressure chamber 16 is opened inside the upper end of the pressurizing column 14. An air outlet 17 is opened on the inner bottom surface of the pressure chamber 16. A sliding closing block 18 is installed inside the pressurizing column 14 below the pressure chamber 16. A pressure guiding tube 19 is opened inside the side surface of the pressurizing column 14 on one side of the closing block 18. A first one-way valve 20 is fixedly installed on the side surface of the pressurizing column 14 on one side of the pressure chamber 16. One end of the first one-way valve 20 is fixedly connected to a sliding tube 21. A sliding connecting tube 22 is installed at the upper end of the sliding tube 21. A pressurizing box 23 is fixedly arranged on the upper surface of the functional disk 11. A sliding piston plate 24 is installed inside the pressurizing box 23. An extrusion rod 25 is fixedly arranged on the side surface of one end of the piston plate 24. A second one-way valve 26 is fixedly installed on the upper surface of one end of the pressurizing box 23. An extrusion block 27 is fixedly arranged on the lower end side surface of the driving ring 8. A pressure sensor 28, a warning lamp 29 and a pressure regulating joint 30 are fixedly installed on the upper surface of the outer box body 1;

[0054] The threaded column 12 is in threaded connection with the driving ring 8. The threaded column 12 is of a hollow design. The lower end of the threaded column 12 is of a C-shaped opening design. The threaded column 12 and the electric push rod 13 are concentrically designed;

[0055] The pressurizing column 14 is in sliding friction connection with the contact cylinder 15. A spring is connected between the pressurizing column 14 and the contact cylinder 15. The inner cavity of the pressurizing column 14 where the upper end of the contact cylinder 15 is located is connected to the pressure chamber 16 through the pressure guiding tube 19;

[0056] The upper surface of the closing block 18 is in contact with one end of the air outlet 17, and a spring is connected between the closing block 18 and the pressurizing column 14. One end of the closing block 18 is located inside the pressure guiding pipe 19, and the end of the closing block 18 located inside the pressure guiding pipe 19 is in sliding friction connection with the pressure guiding pipe 19;

[0057] The upper end of the connecting pipe 22 penetrates through the lower surface of one end of the pressurizing box 23. The pressurizing box 23 is in sliding friction connection with the piston plate 24, and a spring is connected between the piston plate 24 and the pressurizing box 23. One end of the extrusion rod 25 penetrates through the outer surface of the pressurizing box 23, and the end of the extrusion rod 25 located outside the pressurizing box 23 is designed to be hemispherical. The hemispherical end of the extrusion rod 25 is in contact with the outer surface of the extrusion block 27. The extrusion block 27 is designed to be a right trapezoid, and the inclined surface of the extrusion block 27 is in contact with the hemispherical end of the extrusion rod 25;

[0058] After the tensile resistance test is completed, the driving motor 9 drives the driving ring 8 to rotate in the reverse direction through the driving gear 10, so that the driving ring 8 drives the functional disk 11 to slide downward through the threaded connection with the threaded column 12. At this time, the displacement rod 5 drives the stretching tube 4 to slide back to the original position until the stretching tubes 4 are in contact with each other and the rubber sealing ring resumes its non-stretched shape. At this time, due to the downward sliding of the functional disk 11, the extrusion rod 25 is extruded by the inclined surface of the extrusion block 27 and drives the piston plate 24 to slide into the pressurizing box 23, so that the air in the pressurizing box 23 is pressed into the pressure chamber 16 through the connecting pipe 22, the sliding pipe 21 and the first one-way valve 20 under the action of pressure. At this time, the pressure chamber 16 maintains a high-pressure state while the overall pressure inside the outer box body 1 is negative pressure. When the pressurizing column 14 does not slide in place, the high-pressure air in the pressure chamber 16 is blocked by the blocking block 18 and cannot be pressed out through the air outlet 17. When the pressurizing column 14 moves in place, the electric push rod 13 is started to drive the pressurizing column 14 and the contact cylinder 15 to slide downward. The lower end of the contact cylinder 15 contacts the upper end of the stretching tube 4 and the rubber sealing ring at the upper end of the stretching tube 4 and slides upward relative to the pressurizing column 14. The contact cylinder 15 pushes the blocking block 18 through the sliding friction connection with the pressurizing column 14 and the pressure guiding pipe 19 until the blocking block 18 slides past the air outlet 17. The high-pressure air in the pressure chamber 16 is injected downward through the air outlet 17 into the connection between the pressurizing column 14 and the contact cylinder 15. When the sealing performance of the rubber sealing ring at the upper end of the stretching tube 4 is intact, the high-pressure air will not enter the inside of the outer box body 1. Therefore, the internal pressure of the outer box body 1 monitored by the pressure sensor 28 will not change at this time. When the sealing performance of the rubber sealing ring at the upper end of the stretching tube 4 decreases and fails, the high-pressure air enters the inside of the outer box body 1. Therefore, the internal pressure of the outer box body 1 monitored by the pressure sensor 28 increases at this time and returns to normal pressure. At this time, the pressure sensor 28 detects the change in pressure and sends an electrical signal to the warning lamp 29 to light up the warning lamp 29 to remind the staff to perform data recording and rubber sealing ring replacement. When testing in a high-pressure environment is required, the pressure regulating joint 30 is opened to connect with the external pipeline to pressurize the inside of the outer box body 1;

[0059] After the sealing performance test is completed, the driving motor 9 drives the driving ring 8 to rotate through the driving gear 10 to open the stretching tube 4 for the tensile resistance test, and the functional disk 11 slides upward so that the extrusion rod 25 loses extrusion. At this time, the piston plate 24 slides back to the original position under the action of the spring in the pressurizing box 23 and inhales external air through the second one-way valve 26 to make the internal pressure of the outer box body 1 return to normal pressure.

[0060] 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 principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber sealing ring tensile test box, comprising an outer box (1), a sealing glass (2) is fixedly arranged on one outer surface of the outer box (1), and one outer surface of the outer box (1) is designed to be open, and a sealing plate (3) is fixedly installed on the open side of the outer box (1) by bolts, and a battery is arranged inside the outer box (1), characterized in that: The outer box (1) is provided with a stretching mechanism inside, and the sealing performance of the sealing ring is tested by resetting the stretching assembly after the stretching is completed; The stretching mechanism comprises: a stretching tube (4), the stretching tube (4) being slidably mounted on the inner bottom surface of the outer box (1), and a rotatable displacement rod (5) being mounted on the inner bottom surface of the outer box (1), and one end of the displacement rod (5) being fixedly connected to an adjusting gear (6), a connecting ring (7) being arranged above the adjusting gear (6), and a driving ring (8) being fixedly arranged above the connecting ring (7), and the driving ring (8) being rotatably connected to the outer box (1), a driving motor (9) being fixedly mounted inside the upper end of the outer box (1), and a driving gear (10) being fixedly connected to the lower end of the output shaft of the driving motor (9), a sealing ring being sleeved on the upper end of the stretching tube (4), and the lower end of the stretching tube (4) being in contact with the inner bottom surface of the outer box (1); The stretching mechanism also includes: a functional disk (11), the functional disk (11) is slidably mounted inside the outer box body (1), and a threaded column (12) is fixedly mounted on the upper surface of the functional disk (11), and an electric push rod (13) is fixedly mounted on the upper surface of the functional disk (11), the lower end of the electric push rod (13) is fixedly connected to a pressurizing column (14), and a sliding contact cylinder (15) is mounted on the lower end of the pressurizing column (14), a pressure chamber (16) is provided inside the upper end of the pressurizing column (14), and an air outlet (17) is provided on the inner bottom surface of the pressure chamber (16), a sliding closing block (18) is installed inside the pressurizing column (14) below the pressure chamber (16), and a pressure pipe (19) is provided inside the side surface of the pressurizing column (14) on one side of the closing block (18), and the A first one-way valve (20) is fixedly mounted on the side surface of the pressurizing column (14) on one side of the pressure chamber (16), and one end of the first one-way valve (20) is fixedly connected to a sliding tube (21), and a sliding connecting tube (22) is mounted on the upper end of the sliding tube (21); a pressurizing box (23) is fixedly mounted on the upper surface of the functional disk (11), and a sliding piston plate (24) is mounted inside the pressurizing box (23), and an extrusion rod (25) is fixedly mounted on the side surface of one end of the piston plate (24); a second one-way valve (26) is fixedly mounted on the upper surface of one end of the pressurizing box (23); an extrusion block (27) is fixedly mounted on the lower side surface of the driving ring (8); and a pressure sensor (28), a warning light (29) and a pressure regulating joint (30) are fixedly mounted on the upper surface of the outer box body (1); The side surfaces of adjacent stretch tubes (4) are fitted together, the stretch tubes (4) are of arc-shaped design, and the stretch tubes (4) are of concentric design. The displacement rod (5) and the adjustment gear (6) are of concentric design, and the displacement rod (5) and the stretch tube (4) are threadedly connected.

2. A rubber sealing ring tensile test box according to claim 1, characterized in that: A tooth block is fixedly arranged on the lower surface of the connecting ring (7), and the connecting ring (7) is meshedly connected with the adjusting gear (6) via the tooth block on the lower surface. The connecting ring (7) and the driving ring (8) are arranged concentrically, and the driving ring (8) is meshedly connected with the driving gear (10).

3. The rubber sealing ring tensile test box according to claim 1, characterized in that: The threaded column (12) is threadedly connected to the drive ring (8), the threaded column (12) is hollow, and the lower end of the threaded column (12) is C-shaped and has an opening, and the threaded column (12) and the electric push rod (13) are concentrically designed.

4. The rubber sealing ring tensile test box according to claim 1, characterized in that: The pressurizing column (14) and the contact cylinder (15) are connected by sliding friction, and a spring is connected between the pressurizing column (14) and the contact cylinder (15). The internal cavity of the pressurizing column (14) where the upper end of the contact cylinder (15) is located is connected to the pressure chamber (16) via a pressure-conducting tube (19).

5. The rubber sealing ring tensile test box according to claim 1, characterized in that: The upper surface of the closing block (18) fits with one end of the air outlet (17), a spring is connected between the closing block (18) and the pressurizing column (14), and one end of the closing block (18) is located inside the pressure-conducting tube (19), and the end of the closing block (18) located inside the pressure-conducting tube (19) is connected to the pressure-conducting tube (19) by sliding friction.

6. The rubber sealing ring tensile test box according to claim 1, characterized in that: The upper end of the connecting tube (22) passes through the lower surface of one end of the pressurizing box (23); the pressurizing box (23) and the piston plate (24) are connected by sliding friction, and a spring is connected between the piston plate (24) and the pressurizing box (23); one end of the extrusion rod (25) passes through the outer surface of the pressurizing box (23); the end of the extrusion rod (25) located outside the pressurizing box (23) is of hemispherical design, and the hemispherical end of the extrusion rod (25) is in contact with the outer surface of the extrusion block (27); the extrusion block (27) is of right-angled trapezoidal design, and the inclined surface of the extrusion block (27) is in contact with the hemispherical end of the extrusion rod (25).

7. A method for operating a rubber sealing ring tensile test box according to any one of claims 1 to 6, characterized in that: The working method comprises the following steps: S1. Open the sealing plate (3) and place the rubber sealing ring to be tested on the upper end of the stretch tube (4); S2. Start the drive motor (9) so that the functional disk (11) slides upward as a whole so that the stretch tube (4) is opened to perform a stretching test; S3. Start the drive motor (9) so that the function plate (11) slides down as a whole so that the stretch tube (4) is closed and waits for the sealing test; S4. The pressure is transmitted to the rubber seal to be tested at the connection between the contact cylinder (15) and the stretch tube (4); S5. Monitoring the pressure change inside the outer box (1) through the pressure sensor (28); S6. Observe whether the warning light (29) is on to determine the sealing condition of the rubber sealing ring to be tested; S7. After the test is completed, open the sealing plate (3) and replace the rubber sealing ring to be tested.

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