Tensile test box for rubber sealing ring and working method of tensile test box

Abstract

The invention is applied to the technical field of rubber sealing ring tensile tests, and discloses a rubber sealing ring tensile test box which comprises an outer box body, sealing glass is fixedly arranged on the outer surface of one side of the outer box body, the outer surface of one side of the outer box body is designed to be open, and a sealing plate is fixedly mounted on the open side of the outer box body through bolts; a stretching mechanism is arranged in the outer box body, and the sealing performance of the sealing ring is detected through reset movement of a stretching assembly after stretching is completed. According to the tensile test box for the rubber sealing ring, the tensile test of the rubber sealing ring is realized by adopting a mode that the tensile pipe is separated towards the periphery, so that the stress of each part of the rubber sealing ring is relatively uniform, the influence of different stress positions on tensile test data of the rubber sealing ring is avoided, and the consistency of the detection process is ensured; the stretching pipe is opened and closed alternately, so that the timeliness of detecting the sealing performance of the rubber sealing ring is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of rubber sealing ring tensile test, in particular to a rubber sealing ring tensile test box and a working method thereof. Background Art

[0002] As a sealing element widely used in the industrial field, the performance of rubber sealing rings is directly related to the sealing effect and operating stability of the equipment. In practical applications, rubber sealing rings need to withstand different degrees of tensile stress, so their tensile resistance is one of the important indicators to measure their quality and reliability. With the continuous development of industrial technology, the performance requirements for rubber sealing rings are getting higher and higher. Traditional rubber sealing ring tensile resistance test methods often have many limitations and cannot accurately and comprehensively evaluate the tensile resistance of sealing rings under complex working conditions. For example, some simple manual tensile test equipment is not only cumbersome and inefficient to operate, but also the accuracy and repeatability of the test results are difficult to guarantee. In order to meet the increasingly stringent industrial application needs, it is imperative to develop an advanced, efficient and accurate rubber sealing ring tensile test box. In recent years, although some tensile test equipment with a high degree of automation has appeared, there are still some shortcomings. For example, the stretching speed control of some test chambers is not precise enough, resulting in large errors in the test results. The loading methods of some test chambers are unreasonable, which easily causes uneven force on the rubber sealing ring during the test, affecting the reliability of the test results. The environmental simulation function of some test chambers is not perfect enough and cannot truly reproduce the various complex conditions in the actual working environment. In addition, the existing rubber sealing ring tensile test chambers also have certain defects in data collection and processing. The data collection frequency of some test chambers is low, and it is impossible to capture the instantaneous changes in the sealing performance of the rubber sealing ring during multiple stretching processes, which leads to a certain delay in the judgment of the tensile resistance of the rubber sealing ring, and it is impossible to accurately and timely monitor and feedback the failure of the rubber sealing ring. Summary of the invention

[0003] The object of the present invention is to provide a rubber sealing ring tensile test box and a working method thereof, so as to solve the problem in the above background technology that the failure of the rubber sealing ring cannot be monitored and fed back in time.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rubber sealing ring tensile test box, comprising an outer box body, a sealing glass is fixedly provided on the outer surface of one side of the outer box body, and the outer surface of one side of the outer box body is designed to be open, and a sealing plate is fixedly installed on the side of the open design of the outer box body by bolts, a battery is provided inside the outer box body, and a stretching mechanism is provided inside the outer box body, and the sealing performance of the sealing ring is tested by resetting the stretching assembly after the stretching is completed.

[0005] Preferably, the stretching mechanism includes: a stretching tube, which is slidably mounted on the inner bottom surface of the outer box body, and a rotatable displacement rod is mounted on the inner bottom surface of the outer box body, and one end of the displacement rod is fixedly connected to an adjusting gear, a connecting ring is arranged above the adjusting gear, and a driving ring is fixedly arranged above the connecting ring, and the driving ring is rotatably connected to the outer box body, a driving motor is fixedly mounted inside the upper end of the outer box body, and a driving gear is fixedly connected to the lower end of the output shaft of the driving motor, a sealing ring is sleeved on the upper end of the stretching tube, and the lower end of the stretching tube is in contact with the inner bottom surface of the outer box body.

[0006] By adopting the above technical solution, the stretch tube can realize the stretching detection of the rubber sealing ring by separation.

[0007] Preferably, the stretching mechanism also includes: a functional disk, which is slidably mounted inside the outer box body, and a threaded column is fixedly mounted on the upper surface of the functional disk, and an electric push rod is fixedly mounted on the upper surface of the functional disk, a pressurizing column is fixedly connected to the lower end of the electric push rod, and a sliding contact cylinder is mounted on 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-conducting pipe 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 a sliding tube is fixedly connected to one end of the first one-way valve, and a sliding connecting tube is installed on the upper end of the sliding tube, a pressurizing box is fixedly installed on the upper surface of the functional disk, and a sliding piston plate is installed inside the pressurizing box, and an extrusion rod is fixedly installed on the side surface of one end of the piston plate, a second one-way valve is fixedly installed on the upper surface of one end of the pressurizing box, an extrusion block is fixedly installed on the lower end side surface of the driving ring, and a pressure sensor, a warning light and a pressure regulating joint are fixedly installed on the upper surface of the outer box.

[0008] By adopting the above technical solution, the rubber sealing ring can be immediately tested for sealing to verify its tensile resistance after being subjected to the tensile test.

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

[0010] By adopting the above technical solution, the stretch tube can be driven to open to perform the stretch resistance test on the rubber sealing ring.

[0011] Preferably, a tooth block is fixedly provided on the lower surface of the connecting ring, and the connecting ring is meshed and connected with the adjusting gear through the tooth block on the lower surface, and the connecting ring is concentrically arranged with the driving ring, and the driving ring is meshed and connected 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: S1. Open the sealing plate and place the rubber sealing ring to be tested on the upper end of the stretch tube; 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; S3. Start the drive motor to make the function plate slide down as a whole so that the stretch tube is closed and wait for the sealing test; S4. The pressure is transmitted to the rubber seal ring to be tested at the connection between the contact tube and the stretch tube; S5. Monitor the pressure change inside the outer box through the pressure sensor; S6. Observe whether the warning light is on to determine the sealing condition of the rubber seal to be tested; S7. After the test is completed, open the sealing plate and replace the rubber sealing ring to be tested.

[0022] Compared with the prior art, the invention has the following beneficial effects: the rubber sealing ring tensile test box: 1. The tensile test of the rubber sealing ring is realized by separating the tensile tube in all directions, so that the force on the rubber sealing ring is relatively uniform, avoiding the influence of different force positions on the tensile test data of the rubber sealing ring, and ensuring the consistency of the test process; Furthermore, the stretch tube is closed after being opened, so that the stretch tube can form a relatively closed pipeline with the inner bottom surface of the outer box, so that the contact tube can be connected to the stretch tube by pressing down, so that the sealing performance of the rubber sealing ring can be tested by pressurizing the connection between the contact tube and the stretch tube, and the stretch tube is opened and closed alternately to ensure the timeliness of the sealing performance test of the rubber sealing ring; 2. The outer box is sealed as a whole, so that the pressure sensor can monitor the changes in the internal pressure of the outer box during the detection process, thereby realizing the monitoring of the sealing performance of the rubber sealing ring. The warning light can be used to warn the staff when the pressure index changes by a preset amount, so that the staff can record the data in time; Furthermore, by the way that the extrusion rod contacts one end of the extrusion block during the downward movement of the functional disk, the pressure column can automatically pressurize the inside of the pressure chamber when it is driven to slide downward and reset, without external pressure supply, so that there is no need to level the pressure inside the external box during each test, ensuring the consistency of the rubber sealing ring detection environment; Furthermore, by closing the air outlet with the closing block during the downward movement of the pressurized column and pressurizing the pressure-conducting tube when the contact tube contacts the stretching tube, the air outlet can automatically release pressure after the contact tube and the stretching tube are in stable contact, thereby achieving the purpose of automatically testing the sealing performance of the rubber sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the overall cutaway surface of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the cross-section surface of the connection between the functional disk and the threaded column of the present invention; Figure 4It is a schematic diagram of the three-dimensional structure of the functional disk, the threaded column and the electric push rod connected to each other in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the cross-section surface of the connection between the pressurizing column and the contact cylinder of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the cross-section surface of the connection between the drive ring and the drive gear of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the cross-section surface connecting the outer box body and the driving ring of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the connection between the stretch tube and the displacement rod of the present invention; Fig. 9 This is a schematic diagram of the three-dimensional structure of the connection between the pressurizing column and the contact cylinder of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the overall working state of the present invention.

[0024] In the figure: 1. outer box; 2. sealing glass; 3. sealing plate; 4. stretching tube; 5. displacement rod; 6. adjusting gear; 7. connecting ring; 8. driving ring; 9. driving motor; 10. driving gear; 11. function plate; 12. threaded column; 13. electric push rod; 14. pressurizing column; 15. contact cylinder; 16. pressure chamber; 17. air outlet; 18. closing block; 19. pressure guiding pipe; 20. first one-way valve; 21. sliding tube; 22. connecting pipe; 23. pressurizing box; 24. piston plate; 25. extrusion rod; 26. second one-way valve; 27. extrusion block; 28. pressure sensor; 29. ​​warning light; 30. pressure regulating joint. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 10 The present invention provides a technical solution: a rubber sealing ring tensile test box.

[0027] Embodiment 1: This embodiment discloses an outer box 1, a sealing glass 2 is fixedly provided on one side of the outer surface of the outer box 1, and one side of the outer surface of the outer box 1 is designed to be open, and a sealing plate 3 is fixedly installed on the side of the outer box 1 designed to be open by bolts, a battery is provided inside the outer box 1, and a stretching mechanism is provided inside the outer box 1, and the sealing performance of the sealing ring is tested by resetting the stretching assembly after the stretching is completed; The stretching mechanism includes: a stretching tube 4, which is slidably mounted on the inner bottom surface of the outer box body 1, and a rotatable displacement rod 5 is mounted on the inner bottom surface of the outer box body 1, and one end of the displacement rod 5 is fixedly connected to an adjusting gear 6, a connecting ring 7 is arranged above the adjusting gear 6, and a driving ring 8 is fixedly arranged above the connecting ring 7, and the driving ring 8 is rotatably connected to the outer box body 1, a driving motor 9 is fixedly mounted inside the upper end of the outer box body 1, and a driving gear 10 is fixedly connected to the lower end of the output shaft of the driving motor 9, 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; The side surfaces of adjacent stretch tubes 4 are fitted together, and the stretch tubes 4 are arc-shaped and concentrically designed. The displacement rod 5 and the adjustment gear 6 are concentrically designed, and the displacement rod 5 is threadedly connected to the stretch tube 4. A tooth block is fixedly provided on the lower surface of the connecting ring 7, and the connecting ring 7 is meshed and connected with the adjusting gear 6 through the tooth block on the lower surface, and the connecting ring 7 is concentrically arranged with the driving ring 8, and the driving ring 8 is meshed and connected with the driving gear 10; When in use, first remove the sealing plate 3 by removing the bolts, then put the rubber sealing ring to be tested on the upper end of the stretching tube 4 through the opening of the outer box body 1 exposed after the sealing plate 3 is removed, and then install the sealing plate 3 with the outer box body 1 through the bolts to complete the sealing of the outer box body 1. At this time, start the driving motor 9 to drive the driving gear 10 to rotate, and 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 separate and slide outward through the threaded connection with the stretching tube 4 to stretch the rubber sealing ring for tensile resistance test. 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.

[0028] Embodiment 2: Based on Embodiment 1, this embodiment discloses that the stretching mechanism also includes: a function disk 11, the function 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 function disk 11, and an electric push rod 13 is fixedly mounted on the upper surface of the function disk 11, a pressurizing column 14 is fixedly connected to the lower end of the electric push rod 13, and a sliding contact cylinder 15 is mounted on the lower end of the pressurizing column 14, a pressure chamber 16 is opened inside the upper end of the pressurizing column 14, and 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, and the inner side surface of the pressurizing column 14 on one side of the closing block 18 is opened. A pressure guide pipe 19 is provided, 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, and a sliding tube 21 is fixedly connected to one end of the first one-way valve 20, and a sliding connecting tube 22 is installed on the upper end of the sliding tube 21, a pressurizing box 23 is fixedly installed on the upper surface of the function disk 11, and a sliding piston plate 24 is installed inside the pressurizing box 23, and an extrusion rod 25 is fixedly installed 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 installed on the lower end side surface of the driving ring 8, and a pressure sensor 28, a warning light 29 and a pressure regulating joint 30 are fixedly installed on the upper surface of the outer box body 1; The threaded column 12 is threadedly connected to the driving ring 8, and the threaded column 12 is hollow, and the lower end of the threaded column 12 is C-shaped opening, and the threaded column 12 and the electric push rod 13 are concentrically designed; 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 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 pipe 19. The upper surface of the closing block 18 is fitted with one end of the air outlet 17, and 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 pipe 19, and the end of the closing block 18 located inside the pressure pipe 19 is connected to the pressure pipe 19 by sliding friction; 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, and the end of the extrusion rod 25 located outside the pressurizing box 23 is hemispherical in design, and one end of the hemispherical design of the extrusion rod 25 fits with the outer surface of the extrusion block 27, the extrusion block 27 is a right-angled trapezoidal design, and the inclined surface of the extrusion block 27 fits with one end of the hemispherical design of the extrusion rod 25; When the tensile test is completed, the driving motor 9 drives the driving ring 8 to rotate in the opposite 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 and reset until the stretching tubes 4 fit each other and the rubber sealing ring recovers its unstretched shape. At this time, due to the downward movement of the functional disk 11, the extrusion rod 25 is squeezed by the inclined surface of the extrusion block 27 to drive the piston plate 24 to slide into the inside of the pressurizing box 23, so that the air in the pressurizing box 23 is compressed. Under the action of the pressure column 14, the pressure column 14 is pressed into the pressure chamber 16 through the connecting pipe 22, the sliding pipe 21 and the first non-return valve 20. At this time, the pressure chamber 16 maintains a high pressure state and the overall pressure inside the outer box body 1 is negative pressure. When the pressure column 14 does not slide into place, the high-pressure air in the pressure chamber 16 is blocked by the sealing block 18 and cannot be pressed out through the air outlet 17. When the pressure column 14 moves into place, the electric push rod 13 starts to drive the pressure column 14 and the contact cylinder 15 to slide down, and the lower end of the contact cylinder 15 is connected to the upper end of the stretch tube 4 and the rubber seal at the upper end of the stretch tube 4. The sealing ring contacts and slides up relative to the pressurizing column 14, and the contact cylinder 15 pushes the closing block 18 through the sliding friction connection with the pressurizing column 14 and the pressure pipe 19 until the closing block 18 slides to let go of the air outlet 17, and the high-pressure air in the pressure chamber 16 is injected downward into the connection between the pressurizing column 14 and the contact cylinder 15 through the air outlet 17. 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 interior of the outer box body 1, so 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 is reduced and fails, the high-pressure air enters the interior of the outer box body 1, so the internal pressure of the outer box body 1 monitored by the pressure sensor 28 increases and returns to normal pressure at this time. At this time, the pressure sensor 28 detects the change in pressure and sends an electrical signal to the warning light 29, so that the warning light 29 lights up to remind the staff to record the data and replace the rubber sealing ring. When testing in a high-pressure environment, open the pressure regulating joint 30 larger than the external pipeline connection to pressurize the interior of the outer box body 1; After the sealing performance test is completed, the driving motor 9 drives the driving ring 8 to rotate through the driving gear 10 so that the stretching tube 4 is opened for anti-stretching test, and the functional disk 11 slides up so that the extrusion rod 25 loses its extrusion. At this time, the piston plate 24 slides back to its original position under the action of the spring of the pressurizing box 23 and inhales external air through the second one-way valve 26 so that the internal pressure of the outer box body 1 returns to normal pressure.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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: A stretching mechanism is provided inside the outer box body (1), and the sealing performance of the sealing ring is tested by resetting the stretching assembly after the stretching is completed.

2. A rubber sealing ring tensile test box according to claim 1, characterized in that: 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).

3. A rubber sealing ring tensile test box according to claim 2, characterized in that: 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 end side surface of the drive 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 (1).

4. The rubber sealing ring tensile test box according to claim 2, characterized in that: 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.

5. The rubber sealing ring tensile test box according to claim 2, 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).

6. The rubber sealing ring tensile test box according to claim 3, 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.

7. The rubber sealing ring tensile test box according to claim 3, 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).

8. The rubber sealing ring tensile test box according to claim 3, 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.

9. The rubber sealing ring tensile test box according to claim 3, 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).

10. A method for operating a rubber sealing ring tensile test box according to any one of claims 1 to 9, 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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