Rubber ring high-pressure dynamic seal test device

Abstract

The invention relates to the technical field of rubber ring performance detection, in particular to a rubber ring high-pressure dynamic seal test device which comprises a workbench, a mounting frame and a lifter, a bottom cylinder is fixedly arranged at the top of the workbench, a material carrying ring is fixedly arranged in the bottom cylinder, and an air connecting pipe is arranged on the outer wall of the bottom cylinder in a communicating mode; the top of the bottom cylinder is sleeved with a sealing detection assembly, a pressing cylinder is arranged above the bottom cylinder, a material carrying structure is arranged at the bottom of the pressing cylinder, a linkage mechanism is arranged in the pressing cylinder in a transmission connection mode, the top of the pressing cylinder is sleeved with a top cover arranged in a sealing mode, and a positioning rod is arranged at the center of the pressing cylinder in a penetrating mode. A blocking structure abutting against the bottom of the pressing cylinder is arranged at one position of the positioning rod, an unlocking assembly is arranged on the pressing cylinder, and the air leakage position of an unqualified rubber ring is determined by observing the air leakage position in the sealing detection assembly, so that the corresponding position of the rubber ring machining equipment is conveniently maintained, and the maintenance precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber ring performance detection, in particular to a rubber ring high-pressure dynamic sealing test device. Background Art

[0002] Rubber sealing rings are often used in the sealing field. They are usually annular structures composed of one or more annular ring bodies. In actual use, rubber sealing rings are usually installed in the labyrinth gap or sealing groove of the equipment to prevent the medium inside the equipment from leaking out and achieve a sealing effect.

[0003] The rubber ring needs to be tested for sealing strength before it goes into production. Generally, a strength testing machine is used for the test. Water is used as the test medium. The pressure strength test of the rubber ring's sealing performance is achieved by changing the water pressure. The water pressure indicated by the pressure gauge is used to record and display the rubber ring's sealing performance indicators.

[0004] However, for a conventional testing machine using water as the test medium, if the rubber ring fails the test, water leakage will occur, and the fluidity of the water will extend around the rubber ring, making it difficult to identify the specific leakage location of the rubber ring, thereby causing difficulty in repairing the rubber ring processing equipment. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a rubber ring high pressure dynamic seal test device to solve the problem that the existing rubber ring seal detection equipment cannot confirm the leakage position of the rubber ring, resulting in difficulty in repairing the rubber ring processing equipment.

[0006] Based on the above purpose, the present invention provides a rubber ring high-pressure dynamic seal test device, including a workbench, a mounting frame is fixedly provided on the top of the workbench, a lift is fixedly provided on the mounting frame, a bottom cylinder is fixedly provided on the top of the workbench, a loading ring is fixedly provided inside the bottom cylinder, the loading ring is arranged near the top of the bottom cylinder, an air connection pipe is connected on the outer wall of the bottom cylinder, a sealing detection component is sleeved on the top of the bottom cylinder, a pressure cylinder is provided above the bottom cylinder, a loading structure is installed at the bottom of the pressure cylinder, and the internal transmission connection of the pressure cylinder is provided with a coupling for controlling the opening of the loading structure. The pressing cylinder is provided with a sealing top cover, the pressing cylinder is slidably connected to the top cover, the top of the top cover is transmission-connected to the lifting machine, the top cover is transmission-connected to the linkage mechanism, a positioning rod is passed through the center of the pressing cylinder, the positioning rod is slidably connected to the pressing cylinder, one end of the positioning rod is passed through the top cover, a blocking structure abutting against the bottom of the pressing cylinder is provided at one point of the positioning rod, an unlocking assembly is installed on the pressing cylinder, one end of the unlocking assembly is transmission-connected to the blocking structure, and the other end is transmission-connected to the top cover; Among them, the blocking structure cooperates with the pressure cylinder to make the top cover drive the linkage mechanism to drive the loading structure to open, so that the rubber ring can be tested for tensile performance. The rubber ring is compressed by the pressure cylinder, the bottom cylinder and the loading ring, and the sealing detection component is cooperated to perform sealing detection work. The sealing detection component has a structure that displays the leakage position.

[0007] Preferably, the sealing detection component comprises: An annular chamber, one end of which is fixedly connected to the outer wall of the bottom tube, the middle of the annular chamber is flush with the top surface of the bottom tube, and the top of the annular chamber is provided with a plurality of air outlets; A plurality of hollow spheres are respectively disposed on the air outlets.

[0008] Preferably, a pull wire is fixedly provided on the hollow sphere, and the free end of the pull wire is fixedly connected to the interior of the annular chamber.

[0009] Preferably, the loading structure comprises a plurality of arc-shaped plates spliced ​​together, a slide plate is fixedly provided on the inner wall of each of the arc-shaped plates, each of the slide plates is slidably connected to the pressing cylinder, and each of the slide plates is transmission-connected to the linkage mechanism.

[0010] Preferably, the linkage mechanism comprises: A driving tube, sleeved on the positioning rod, one end of the driving tube is fixedly connected to the top cover, and the driving tube is connected to the top cover; A driving disc, sleeved on the positioning rod, the top of the driving disc being fixedly connected to the driving tube; A first spring is sleeved on the positioning rod, and two ends of the first spring are respectively pressed against the bottom of the driving disk and the pressure cylinder; A plurality of slide grooves are arranged at the bottom of the pressing cylinder, each of the slide grooves is provided with a sliding block in a sliding connection, and each of the sliding blocks is fixedly connected to the sliding plate respectively; A plurality of connecting arms have one end hinged to the sliders respectively, and the other end hinged to the outer wall of the driving disk.

[0011] Preferably, the blocking structure comprises: At least one mounting groove is provided on the positioning rod; At least one protrusion is arranged in the installation groove, and one end of the protrusion extends out of the installation groove; At least one second spring is arranged in the installation groove, and two ends of the second spring are respectively against the installation groove and one end of the protrusion.

[0012] Preferably, an inclined surface is provided at the bottom of one end of the protrusion extending out of the mounting groove.

[0013] Preferably, the unlocking component comprises: At least one first rack, slidably connected to the bottom of the pressing cylinder, one end of the first rack being disposed close to the protrusion; At least one gear, both ends of which are rotatably connected to brackets, each of which is fixed to the bottom of the pressing cylinder, and the gear is meshed with the first rack; At least one second rack, arranged between the gear and the positioning rod bracket, the second rack is passed through the bottom of the pressing cylinder, the second rack is slidably connected to the pressing cylinder, and the second rack is meshed with the gear; At least one limiting plate, one end of which is fixedly mounted on the inner bottom of the pressing cylinder, and the other end of which is vertically extended and penetrated by a guide rod, one end of which is fixedly connected to one end of the second rack, and the other end of which is provided with a limiting block; At least one third spring is sleeved on the guide rod, and two ends of the third spring are respectively pressed against the limit plate and the limit block; A driving rod, one end of which is arranged above the guide rod, and the other end of which is fixedly connected to the top cover.

[0014] Preferably, a support plate is fixedly provided on the top of the elevator, and a stop block for resetting the positioning rod is fixedly provided on the bottom of one end of the support plate away from the elevator.

[0015] The beneficial effects of the present invention are as follows: after the rubber ring is processed, the rubber ring is first marked with dots, and then put on the loading structure, and the positioning rod is used to abut against the bottom of the bottom cylinder. The elevator drives the top cover to be pressed down, and the blocking structure cooperates with the pressure cylinder, so that the top cover drives the linkage mechanism to drive the loading structure to open, so that the rubber ring can be tested for tensile performance. When the top cover is pressed down to a certain extent, the unlocking component is triggered, so that the blocking structure releases the pressure cylinder to reset the rubber ring, and the pressure cylinder, the bottom cylinder and the loading ring cooperate to compress the rubber ring, and high-pressure gas is introduced through the air pipe. The position where the hollow sphere in the sealing detection component is blown out by the leakage is observed to determine the leakage position of the unqualified rubber ring, thereby facilitating the maintenance of the corresponding position of the rubber ring processing equipment and improving the maintenance accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of a cross-sectional structure of an embodiment of the present invention; Figure 3 For the embodiment of the present invention Figure 2 Enlarge the structural diagram at A; Figure 4 For the embodiment of the present invention Figure 2 Enlarge the structural diagram at B; Figure 5 This is a schematic diagram of the three-dimensional structure inside the pressing cylinder of an embodiment of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the bottom of the pressing cylinder according to an embodiment of the present invention.

[0018] The markings in the figure are: 1. Workbench; 2. Mounting frame; 3. Lifter; 4. Bottom cylinder; 5. Loading ring; 6. Air pipe; 7. Press cylinder; 8. Top cover; 9. Positioning rod; 10. Annular chamber; 11. Hollow sphere; 12. Pull wire; 13. Arc plate; 14. Slide plate; 15. Drive tube; 16. Drive disk; 17. First spring; 18. Slide groove; 19. Slider; 20. Connecting arm; 21. Mounting groove; 22. Bump; 23. Second spring; 24. First rack; 25. Gear; 26. Bracket; 27. Second rack; 28. Limit plate; 29. ​​Guide rod; 30. Limit block; 31. Third spring; 32. Drive rod; 33. Support plate; 34. Stop block. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figures 1 to 6As shown, a rubber ring high-pressure dynamic seal test device comprises a workbench 1, a mounting frame 2 is fixedly arranged on the top of the workbench 1, a lift 3 is fixedly arranged on the mounting frame 2, a bottom cylinder 4 is fixedly arranged on the top of the workbench 1, a loading ring 5 is fixedly arranged inside the bottom cylinder 4, the loading ring 5 is arranged near a place on the top of the bottom cylinder 4, an air connection pipe 6 is connected on the outer wall of the bottom cylinder 4, a sealing detection component is sleeved on the top of the bottom cylinder 4, a pressure cylinder 7 is arranged above the bottom cylinder 4, a loading structure is installed at the bottom of the pressure cylinder 7, and a linkage mechanism for controlling the opening of the loading structure is provided in the internal transmission connection of the pressure cylinder 7. A sealing top cover 8 is sleeved on the top of the pressing cylinder 7, the pressing cylinder 7 is slidably connected to the top cover 8, the top of the top cover 8 is transmission-connected to the lifting machine 3, the top cover 8 is transmission-connected to the linkage mechanism, a positioning rod 9 is penetrated at the center of the pressing cylinder 7, the positioning rod 9 is slidably connected to the pressing cylinder 7, one end of the positioning rod 9 is penetrated on the top cover 8, a blocking structure abutting against the bottom of the pressing cylinder 7 is provided at one point of the positioning rod 9, an unlocking assembly is installed on the pressing cylinder 7, one end of the unlocking assembly is transmission-connected to the blocking structure, and the other end is transmission-connected to the top cover 8; Among them, the blocking structure cooperates with the pressure cylinder 7 to make the top cover 8 drive the linkage mechanism to drive the loading structure to open, so that the rubber ring can be tested for tensile performance. The rubber ring is compressed by the pressure cylinder 7, the bottom cylinder 4 and the loading ring 5, and the sealing detection component is cooperated to perform sealing detection work. The sealing detection component has a structure that displays the leakage position.

[0022] As an optional embodiment, the sealing detection component includes: An annular chamber 10, one end of which is fixedly connected to the outer wall of the bottom tube 4, the middle of the annular chamber 10 is flush with the top surface of the bottom tube 4, and the top of the annular chamber 10 is provided with a plurality of air outlets; A plurality of hollow spheres 11 are respectively disposed on the air outlets.

[0023] As an optional embodiment, a pull wire 12 is fixedly provided on the hollow sphere 11 , and a free end of the pull wire 12 is fixedly connected to the interior of the annular chamber 10 .

[0024] For example, after the rubber ring is processed, the rubber ring is first marked with dots, and then put on the loading structure. The top cover 8 is pressed down by the elevator 3, so that the positioning rod 9 enters the bottom tube 4 and abuts against the bottom of the bottom tube 4. The blocking structure cooperates with the pressing tube 7 to abut against each other, so that the top cover 8 drives the linkage mechanism to drive the loading structure to open, so that the rubber ring can be tested for tensile performance. When the top cover 8 is pressed down to a certain extent, the unlocking component is triggered, so that the blocking structure releases the pressing tube 7 to reset the rubber ring. The elevator 3 continues to drive the top cover 8 to press down, so that the pressing tube 7, the bottom tube 4 and the loading ring 5 cooperate to compress the rubber ring, and high-pressure gas is introduced through the air pipe 6. By observing the position where the hollow sphere 11 in the sealing detection component is blown out by leakage, the leakage position of the unqualified rubber ring is determined, so as to facilitate the maintenance of the corresponding position of the rubber ring processing equipment and improve the maintenance accuracy. By setting a pull line 12 on the hollow sphere 11, it is prevented that the hollow sphere 11 is blown out to the corner by leakage and difficult to find.

[0025] As an optional embodiment, the loading structure includes a plurality of arc plates 13 spliced ​​together, each of the arc plates 13 has a slide plate 14 fixed on its inner wall, each of the slide plates 14 is slidably connected to the pressing cylinder 7, and each of the slide plates 14 is transmission-connected to the linkage mechanism.

[0026] As an optional embodiment, the linkage mechanism includes: A driving tube 15 is sleeved on the positioning rod 9, one end of the driving tube 15 is fixedly connected to the top cover 8, and the driving tube 15 is connected to the top cover 8; A driving disk 16 is sleeved on the positioning rod 9, and the top of the driving disk 16 is fixedly connected to the driving tube 15; A first spring 17 is sleeved on the positioning rod 9, and two ends of the first spring 17 are respectively pressed against the bottom of the driving disk 16 and the pressing cylinder 7; A plurality of slide grooves 18 are arranged at the bottom of the pressing cylinder 7, and a slider 19 is provided inside each of the slide grooves 18 for sliding connection, and each of the sliders 19 is fixedly connected to the slide plate 14 respectively; A plurality of connecting arms 20 have one end hinged to the sliders 19 respectively, and the other end hinged to the outer wall of the driving disk 16 .

[0027] For example, since the blocking structure and the bottom of the pressure cylinder 7 are against each other, the driving tube 15 is driven downward through the top cover 8, and the driving tube 15 drives the driving disk 16 to move downward. The driving disk 16 pushes the slider 19 to move through the connecting arm 20, and the slider 19 drives one end of the slide plate 14, and the slide plate 14 drives the arc plate 13 to move, so that all the arc plates 13 are in an open state and act on the rubber ring, so that the rubber ring is stretched to detect the tensile strength of the rubber ring.

[0028] As an optional embodiment, the blocking structure includes: At least one mounting groove 21 is provided on the positioning rod 9; At least one protrusion 22 is disposed in the mounting groove 21, and one end of the protrusion 22 extends out of the mounting groove 21; At least one second spring 23 is disposed in the mounting groove 21 , and two ends of the second spring 23 abut against the mounting groove 21 and one end of the protrusion 22 respectively.

[0029] For example, when the rubber ring is stretched to a certain extent by the arc plate 13, the top cover 8 triggers the unlocking component, causing the protrusion 22 to retract into the installation groove 21. At this time, the pressing cylinder 7 is not resisted by the protrusion 22. Under the action of the first spring 17, the pressing cylinder 7 moves downward, and the internal structure of the pressing cylinder 7 is completely reset. The rubber ring is reset, and at the same time, the entire blocking structure enters the interior of the pressing cylinder 7, and the protrusion 22 is extended again under the action of the second spring 23.

[0030] As an optional embodiment, a slope is provided at the bottom of one end of the protrusion 22 extending out of the mounting groove 21 .

[0031] For example, by setting the bottom of the protrusion 22 as an inclined surface, it is convenient to control the entire blocking structure to move out of the pressing cylinder 7 and to abut against the bottom of the pressing cylinder 7 again when the positioning rod 9 is reset.

[0032] As an optional embodiment, the unlocking component includes: At least one first rack 24 is slidably connected and arranged at the bottom of the pressing cylinder 7, and one end of the first rack 24 is arranged close to the protrusion 22; At least one gear 25, both ends of which are rotatably connected with brackets 26, each of which is fixed at the bottom of the pressing cylinder 7, and the gear 25 is meshed with the first rack 24; At least one second rack 27 is provided between the gear 25 and the bracket 26 of the positioning rod 9, the second rack 27 is penetrated at the bottom of the pressing cylinder 7, the second rack 27 is slidably connected to the pressing cylinder 7, and the second rack 27 is meshed with the gear 25; At least one limiting plate 28, one end of which is fixedly mounted on the inner bottom of the pressing cylinder 7, and the other end of which is vertically extended and penetrated by a guide rod 29, one end of which is fixedly connected to one end of the second rack 27, and the other end of which is provided with a limiting block 30; At least one third spring 31 is sleeved on the guide rod 29, and two ends of the third spring 31 are respectively pressed against the limit plate 28 and the limit block 30; The driving rod 32 has one end disposed above the guide rod 29 and the other end fixedly connected to the top cover 8 .

[0033] For example, after the rubber ring is stretched to one end, the top cover 8 drives the driving rod 32 to move downward, pushing the limit block 30 to move downward, the limit block 30 drives the guide rod 29 to move downward, the guide rod 29 drives the second rack 27 to move downward, the second rack 27 drives the gear 25 to rotate, the gear 25 drives the first rack 24 to move, and the first rack 24 pushes the protrusion 22 to retract into the installation groove 21 to release the pressing cylinder 7 and reset the rubber ring.

[0034] As an optional embodiment, a support plate 33 is fixedly provided on the top of the lift 3 , and a stop block 34 for resetting the positioning rod 9 is fixedly provided on the bottom of one end of the support plate 33 away from the lift 3 .

[0035] For example, in order to automatically reset the positioning rod 9, after detection, the positioning rod 9 is in a state of extending out of the top cover 8. When the elevator 3 is reset to the top, the positioning rod 9 is abutted against the abutment block 34 to push the positioning rod 9 downward and reset the blocking structure to abut against the bottom of the pressing cylinder 7.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rubber ring high-pressure dynamic seal test device, comprising a workbench (1), a mounting frame (2) fixedly disposed on the top of the workbench, a lift (3) fixedly disposed on the mounting frame (2), characterized in that: A bottom cylinder (4) is fixedly provided on the top of the workbench (1), a loading ring (5) is fixedly provided inside the bottom cylinder (4), the loading ring (5) is arranged near a position on the top of the bottom cylinder (4), an air connection pipe (6) is connected to the outer wall of the bottom cylinder (4), a sealing detection component is sleeved on the top of the bottom cylinder (4), a pressing cylinder (7) is provided above the bottom cylinder (4), a loading structure is installed at the bottom of the pressing cylinder (7), a linkage mechanism for controlling the opening of the loading structure is provided in the internal transmission connection of the pressing cylinder (7), a sealing top cover (8) is sleeved on the top of the pressing cylinder (7), and the pressing cylinder (7) is provided with a sealing device. ) is slidably connected to the top cover (8), the top of the top cover (8) is transmission-connected to the elevator (3), the top cover (8) is transmission-connected to the linkage mechanism, a positioning rod (9) is passed through the center of the pressing cylinder (7), the positioning rod (9) is slidably connected to the pressing cylinder (7), one end of the positioning rod (9) is passed through the top cover (8), a blocking structure abutting against the bottom of the pressing cylinder (7) is provided at one point of the positioning rod (9), an unlocking component is installed on the pressing cylinder (7), one end of the unlocking component is transmission-connected to the blocking structure, and the other end is transmission-connected to the top cover (8); The blocking structure cooperates with the pressure cylinder (7) to enable the top cover (8) to drive the linkage mechanism to drive the material loading structure to open, so that the rubber ring can be tested for tensile properties. The rubber ring is compressed by the pressure cylinder (7), the bottom cylinder (4) and the material loading ring (5), and the sealing detection component is cooperated to perform sealing detection. The sealing detection component has a structure that displays the leakage position.

2. A rubber ring high pressure dynamic seal test device according to claim 1, characterized in that: The sealing detection component comprises: An annular chamber (10), one end of which is fixedly connected to the outer wall of the bottom tube (4), the middle of the annular chamber (10) is flush with the top surface of the bottom tube (4), and the top of the annular chamber (10) is provided with a plurality of air outlets; A plurality of hollow spheres (11) are respectively disposed on the air outlets.

3. A rubber ring high pressure dynamic seal test device according to claim 2, characterized in that: A pull wire (12) is fixedly disposed on the hollow sphere (11), and a free end of the pull wire (12) is fixedly connected to the interior of the annular chamber (10).

4. A rubber ring high pressure dynamic seal test device according to claim 1, characterized in that: The material loading structure comprises a plurality of arc-shaped plates (13) spliced ​​together, each of the arc-shaped plates (13) having a slide plate (14) fixedly disposed on its inner wall, each of the slide plates (14) being slidably connected to the pressing cylinder (7), and each of the slide plates (14) being transmission-connected to the linkage mechanism.

5. A rubber ring high pressure dynamic seal test device according to claim 4, characterized in that: The linkage mechanism comprises: A drive tube (15) is sleeved on the positioning rod (9), one end of the drive tube (15) is fixedly connected to the top cover (8), and the drive tube (15) is connected to the top cover (8); A driving disk (16) is sleeved on the positioning rod (9), and the top of the driving disk (16) is fixedly connected to the driving tube (15); A first spring (17) is sleeved on the positioning rod (9), and two ends of the first spring (17) respectively abut against the bottom of the driving disk (16) and the pressing cylinder (7); A plurality of slide grooves (18) are arranged at the bottom of the pressing cylinder (7), each of the slide grooves (18) being internally slidably connected with a slider (19), and each of the sliders (19) is fixedly connected to the slide plate (14) respectively; A plurality of connecting arms (20) have one end each hinged to the slider (19) and the other end hinged to the outer wall of the driving disk (16).

6. A rubber ring high pressure dynamic seal test device according to claim 1, characterized in that: The blocking structure comprises: At least one mounting groove (21) is arranged on the positioning rod (9); At least one protrusion (22) is arranged in the installation groove (21), and one end of the protrusion (22) extends out of the installation groove (21); At least one second spring (23) is arranged in the installation groove (21), and two ends of the second spring (23) respectively abut against the installation groove (21) and one end of the protrusion (22).

7. A rubber ring high pressure dynamic seal test device according to claim 6, characterized in that: An inclined surface is provided at the bottom of one end of the protrusion (22) extending out of the mounting groove (21).

8. A rubber ring high pressure dynamic seal test device according to claim 6, characterized in that: The unlocking component comprises: At least one first rack (24) is slidably connected to the bottom of the pressing cylinder (7), and one end of the first rack (24) is disposed close to the protrusion (22); at least one gear (25), both ends of which are rotatably connected to brackets (26), each of the brackets (26) being fixed to the bottom of the pressing cylinder (7), and the gear (25) meshing with the first rack (24); at least one second rack (27), arranged on the gear (25) and the bracket (26) of the positioning rod (9), the second rack (27) passing through the bottom of the pressing cylinder (7), the second rack (27) being slidably connected to the pressing cylinder (7), and the second rack (27) being meshed with the gear (25); at least one limiting plate (28), one end of which is fixedly mounted on the inner bottom of the pressing cylinder (7), and the other end of which is vertically extended and penetrated by a guide rod (29), one end of which is fixedly connected to one end of the second rack (27), and the other end of which is provided with a limiting block (30); At least one third spring (31) is sleeved on the guide rod (29), and two ends of the third spring (31) respectively abut against the limit plate (28) and the limit block (30); A driving rod (32) has one end disposed above the guide rod (29) and the other end fixedly connected to the top cover (8).

9. A rubber ring high pressure dynamic seal test device according to claim 1, characterized in that: A support plate (33) is fixedly provided on the top of the elevator (3), and a stop block (34) for resetting the positioning rod (9) is fixedly provided on the bottom of one end of the support plate (33) away from the elevator (3).

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