Rubber compression permanent deformation and tensile soaking test device and test method

Abstract

The invention relates to the field of rubber material soaking tests, in particular to a rubber compression permanent deformation and tensile soaking test device and a test method.The device comprises a reaction kettle, a lining is arranged in the reaction kettle, and a compression sample device and a tensile sample support are arranged in the lining; the sample compression device comprises an upper fixing plate, a middle supporting plate, a fixing bolt B, a fixing nut B and a limiting pad, a plurality of corresponding dismounting holes are formed in the upper fixing plate and the middle supporting plate, the upper fixing plate and the middle supporting plate are connected through the fixing bolt B and the fixing nut B which are arranged in the dismounting holes, and the fixing bolt B is provided with the limiting pad; a compression sample is arranged between the upper fixing plate and the middle supporting plate; the tensile sample bracket is used for carrying out a sample tensile experiment. The rubber compression set and tensile soaking test device is made of thickened polytetrafluoroethylene, can resist high temperature up to 250 DEG C, is resistant to acid and alkali corrosion, can resist high temperature and high-temperature acid and alkali environments, and is wider in application range.

Description

Technical Field

[0001] The invention relates to the field of rubber material immersion testing, in particular to a rubber compression permanent deformation and tensile immersion testing device and a testing method. Background Art

[0002] Rubber is a common material with many types. It is widely used because of its excellent elasticity and wear resistance. It is often used to make sealing gaskets, sealants, sealing foams, etc. Its sealing principle mainly uses the excellent compression and rebound characteristics of rubber materials, and uses the pre-compression amount of the seal and its rebound force to achieve the sealing effect. At the same time, the seal usually needs to be in contact with the sealing medium (such as solvents, gases, etc.) during use. Therefore, it is necessary to conduct an aging test on the rubber material of the seal, and estimate its service life in combination with its compression permanent deformation and its mechanical properties, so that the seal can be replaced in time.

[0003] Regarding the test methods for rubber performance, there are currently standards such as GB / T 7759.1-2015 "Determination of compression set of vulcanized rubber or thermoplastic rubber Part 1: At room and elevated temperatures", GB / T 528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber", and GB / T 1690-2006 "Test methods for liquid resistance of vulcanized rubber or thermoplastic rubber". Compression set and tensile property changes are commonly used aging test measurement parameters for rubber materials. Among them, the measurement method for compression set is to place the sample between two compression plates, and press the two compression plates with fasteners. In addition to the sample, a limiting element is placed between the two compression plates. The limiting element controls the distance between the two compression plates so that the compression of the sample meets the standard requirements. After aging for a certain period of time at the temperature required by the test, the compression set of the rubber material is calculated by the deformation degree of the sample. The tensile stress-strain performance test is to place the pre-processed sample at the temperature required by the test, age it for a certain period of time, then take it out and test its tensile properties (such as tensile strength, elongation, etc.).

[0004] In the prior art, the limiting elements used in the compression permanent deformation test generally adopt a rectangular or cylindrical structure with fixed size, which is flexibly connected to the compression plate. When testing samples with different compression rate requirements, it is necessary to disassemble and replace the limiting elements of different heights. Generally, aging tests are carried out in air, so the material of the compression device is generally metal. However, when the aging test environment is a harsh environment (such as high temperature acid and alkali), general metal materials cannot meet the requirements of long-term aging tests. At the same time, for tests with a large number of sample types at one time, the fixture in the prior art needs to be tested repeatedly, which will lead to an increase in test solutions and containers during the experiment, resulting in excessive costs and waste. There are also problems with the tensile performance test device that it is not suitable for testing under harsh conditions and cannot test multiple samples at the same time. Summary of the invention

[0005] The invention provides a rubber compression permanent deformation and tensile immersion test device and a test method, which are used to solve the problems that the compression permanent deformation and tensile immersion test device in the prior art is not suitable for testing under harsh conditions and cannot test multiple samples at the same time.

[0006] The technical solution of the present invention is as follows:

[0007] A rubber compression permanent deformation and tensile immersion test device, the device comprises a reactor, a liner, a compression test device and a tensile sample holder, the reactor is provided with a liner, the liner is provided with a compression test device and a tensile sample holder; the compression test device comprises an upper fixing plate, an intermediate support plate, a fixing bolt B, a fixing nut B and a limit pad, the upper fixing plate and the intermediate support plate are provided with a plurality of corresponding disassembly holes, the upper fixing plate and the intermediate support plate are connected by fixing bolts B and fixing nuts B provided in the disassembly holes, the fixing bolts B are provided with a limit pad, and the compression sample is provided between the upper fixing plate and the intermediate support plate; the tensile sample holder is used for performing a sample tensile test.

[0008] In some embodiments, a kettle cover is provided on the top of the reactor, a kettle cover connecting flange is provided on the top of the reactor, the kettle cover connecting flange and the kettle cover are connected by fixing bolts A and fixing nuts A, and the reactor and the kettle cover are made of rigid metal material; an exhaust hole is opened at the bottom of the reactor, and the exhaust hole discharges air when the liner is placed in the reactor.

[0009] In some embodiments, the liner is cylindrical, a sealing cover is provided on the top of the liner, a sealing ring is provided between the sealing cover and the liner, and the sealing cover and the sealing ring are used to seal the liner.

[0010] In some embodiments, the liner is made of polytetrafluoroethylene, the sealing cover is made of flexible material, the liner and the sealing cover are tightly fitted into the reactor and are higher than the reactor. The reactor cover is clamped with fixing bolts A and nuts A to tighten the liner and the sealing cover.

[0011] In some embodiments, one side of the middle support plate is connected to the upper fixing plate, and the other side of the middle support plate is connected to the lower fixing plate. Several corresponding disassembly holes are provided on the lower fixing plate and the middle support plate. Fixing bolts B are provided in the disassembly holes. The lower fixing plate and the middle support plate are connected by fixing bolts B and fixing nuts B.

[0012] In some embodiments, the upper fixing plate, the middle supporting plate and the lower fixing plate are cylindrical structures and are all made of polytetrafluoroethylene.

[0013] In some embodiments, the tensile specimen holder includes a base, a fixing rod, a left support plate and a right support plate, the left support plate and the right support plate are arranged in parallel, and both are installed on the base; the upper and lower positions of the left support plate and the right support plate are connected by fixing screws and fixing nuts C; two rows of corresponding fixing holes are provided in the middle of the left support plate and the right support plate, and the fixing rod passes through the corresponding fixing holes to connect the two support plates, and multiple tensile specimens are hung on each fixing rod, and adjacent tensile specimens are separated by isolation pads.

[0014] In some embodiments, the tensile specimen support is made of thick polytetrafluoroethylene, and the left support plate and the right support plate are provided with solution flow holes at the position where the tensile specimen is suspended, and the solution flow holes allow the solution to fully contact with the tensile specimen.

[0015] In some embodiments, a glass protective cover containing sand is provided at the bottom of the device to prevent leakage of gas or liquid.

[0016] A method for testing permanent deformation and tensile immersion of rubber by compression, comprising:

[0017] Step 1: Install the compression test device;

[0018] Step 1.1: Place the compression specimen between the middle support plate and the upper fixed plate;

[0019] Step 1.2: Use fixing bolts B to pass through the limit pads to connect the upper fixing plate and the middle support plate;

[0020] Step 1.3: Use fixing nut B to pre-tighten and make the upper fixing plate, middle support plate and limit pad contact;

[0021] Step 1.4: Place the compression specimen between the middle support plate and the lower fixed plate;

[0022] Step 1.5: Install the lower fixing plate and the middle support plate according to the methods of step 1.2 and step 1.3;

[0023] Step 2: Install the tensile specimen support;

[0024] Step 2.1: Hang the tensile specimens on the fixed rods one by one, and separate the adjacent tensile specimens with isolation pads;

[0025] Step 2.2: Insert the fixing rods into the fixing holes on the left and right support plates;

[0026] Step 2.3: Connect the upper and lower parts of the left support plate and the right support plate through the fixing screw and the fixing nut C;

[0027] Step 3: Immerse the compression test apparatus and the tensile specimen holder and conduct the test;

[0028] Step 3.1: Place the compression test device and the tensile specimen holder into the liner in sequence, add the required test solution, and ensure that the test solution completely immerses all specimens;

[0029] Step 3.2: Cover the liner with a sealing cover and place it in the reactor. Connect the reactor cover to the reactor cover connecting flange through fixing bolts A and fixing nuts A. Tighten fixing bolts A and fixing nuts A so that the reactor cover presses the liner and the sealing cover tightly.

[0030] The implementation of the present invention has the following beneficial effects:

[0031] (1) The present invention proposes a rubber compression permanent deformation and tensile immersion test device. The device of the present invention is made of thickened polytetrafluoroethylene, which can withstand high temperatures up to 250°C and is resistant to acid and alkali corrosion. It can withstand high temperatures and acid and alkali environments at high temperatures and has a wider range of uses.

[0032] (2) The present invention proposes a rubber compression permanent deformation and tensile immersion test device. The compression permanent deformation fixture of the present invention is a double-layer circular design. The compression specimen is installed on the fixed plates on both sides. The double-layer fixed plates are independently designed and can be disassembled and installed separately. The operation is simple and saves cost and space. A limit pad is provided between the compression plates of the compression permanent deformation fixture. The limit pad and the compression plate are fixed with bolts. In this way, the specimen is evenly stressed and is more stable and easy to operate.

[0033] (3) The present invention proposes a rubber compression permanent deformation and tensile immersion test device. The two sides of the tensile specimen holder of the present invention are hollowed out to ensure that the solution and the specimen are in full contact during the test, reduce the error of the test result, and make the test result more accurate. In addition, the tensile specimens are installed so that each specimen is separated by an isolation gasket to ensure that the specimens do not contact each other during the test and affect the test results.

[0034] (4) The present invention proposes a rubber compression permanent deformation and tensile immersion test device. A polytetrafluoroethylene liner is added to the kettle body of the test device, which can be used for long-term testing in harsh environments. An exhaust hole is opened at the bottom of the stainless steel kettle. When the liner is placed in the stainless steel kettle, the air in the kettle can be discharged. After the test, the liner can be pushed out through the exhaust hole. A sealing gasket is added to the liner sealing cover. The stainless steel kettle cover and bolts and nuts are used to tightly connect the stainless steel kettle cover and the kettle body, and the liner and the sealing cover are pressed to prevent pressure, corrosion, and leakage during the test.

[0035] (5) The present invention proposes a rubber compression permanent deformation and tensile immersion test device. The present invention adopts a double-layer design for the compression permanent deformation and tensile specimen fixtures, which simplifies the test process, is easy to operate, reduces the amount of solution used, and avoids the waste of chemicals. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a rubber compression permanent deformation and tensile immersion test device proposed in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of a compression permanent deformation fixture of a rubber compression permanent deformation and tensile immersion test device proposed in an embodiment of the present invention;

[0038] Figure 3 It is an internal cross-sectional view of a compression permanent deformation fixture of a rubber compression permanent deformation and tensile immersion test device proposed in an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of a tensile specimen support for a rubber compression permanent deformation and tensile immersion test device provided in an embodiment of the present invention;

[0040] Description of the drawings: 1. Fixing bolt A; 2. Fixing nut A; 3. Reactor cover; 4. Reactor cover connecting flange; 5. Reactor; 6. Exhaust hole; 7. Sealing cover; 8. Sealing ring; 9. Liner; 10. Compression test device; 11. Tensile specimen holder; 12. Upper fixing plate; 13. Middle support plate; 14. Lower fixing plate; 15. Fixing bolt B; 16. Disassembly hole; 17. Limiting pad; 18. Compression specimen; 19. Fixing nut B; 20. Fixing nut C; 21. Left support plate; 22. Solution flow hole; 23. Isolation pad; 24. Fixing hole; 25. Fixing screw; 26. Fixing rod; 27. Tensile specimen; 28. Right support plate; 29. ​​Base. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0042] like Figures 1 to 4 As shown, the present invention provides a rubber compression permanent deformation and tensile immersion test device, which includes a reaction kettle 5, an inner liner 9, a compression test device 10 and a tensile specimen holder 11.

[0043] The reactor 5 is a container for containing the liner 9. The reactor 5 is provided with a lid 3 on the top. The reactor 5 and the lid 3 are made of stainless steel. The top of the reactor is provided with a lid connection flange 4. The lid connection flange 4 and the top of the lid 3 are provided with a number of corresponding through holes. The through holes can be provided with fixing bolts. The reactor 5 and the lid 3 are connected by fixing bolts A1 and fixing nuts A2. The bottom of the stainless steel reactor of the reactor 5 is provided with an exhaust hole 6. When the liner 9 is placed in the reactor 5, the air in the reactor can be discharged. After the test, the liner 9 can be pushed out through the exhaust hole 6.

[0044] The liner 9 is arranged inside the reactor 5. The liner 9 is cylindrical and is used to contain the test solution, the compression test device 10 and the tensile specimen holder 11. A sealing cover 7 is arranged on the top of the liner 9. The sealing cover 7 is made of a flexible material. A sealing ring 8 is arranged between the sealing cover 7 and the liner 9. The sealing cover 7 and the sealing ring 8 are used to seal the liner 9. The liner 9 is made of polytetrafluoroethylene (PTFE) and can be used for long-term testing in harsh environments. After the liner 9 is placed in the stainless steel reactor, there will be a protrusion of about 1 cm in height. The reactor cover and the reactor body 5 are tightly connected by the reactor cover, fixing bolts A and fixing nuts A2, and then the liner 9 and the sealing cover 7 are pressed tightly to prevent pressure, corrosion, and leakage during the test.

[0045] The compression test device 10 includes an upper fixing plate 12, an intermediate support plate 13, a lower fixing plate 14, a fixing bolt B15, a fixing nut B19 and a limiting pad 17. The upper fixing plate 12, the intermediate support plate 13 and the lower fixing plate 14 are cylindrical structures, all made of polytetrafluoroethylene (PTFE), which can withstand high temperatures and acid-base environments at high temperatures, and have a wider range of uses. The upper fixing plate 12 and the lower fixing plate 14 are both provided with a disassembly hole 16 corresponding to the position of the intermediate support plate 13. The upper fixing plate 12 and the lower fixing plate 14 are respectively fixed to both sides of the intermediate support plate 13 in the through hole by fixing bolts B15 and fixing nuts B19. The fixing bolt B15 is provided with a limiting pad 17. The limiting pad 17 and the fixing plate are fixed with bolts, so that the specimen is evenly stressed, more stable and easy to operate. The compression specimen 18 is arranged between the upper fixing plate 12 and the intermediate support plate 13, and between the lower fixing plate 14 and the intermediate support plate 13. The compression permanent deformation test device adopts a double-layer circular design, and the compression specimen 18 is installed on the fixing plates on both sides. The double-layer fixing plates are independently designed and can be disassembled and installed separately. The operation is simple and the cost and space are saved.

[0046] The tensile specimen holder 11 comprises a base 29, a fixing rod 26, a left supporting plate 21 and a right supporting plate 28. The tensile specimen holder 11 is made of thickened polytetrafluoroethylene (PTFE). The left supporting plate 21 and the right supporting plate 28 are arranged in parallel and both are installed on the base 29. The upper and lower positions of the left supporting plate 21 and the right supporting plate 28 are connected by fixing screws 25 and fixing nuts C20. Two rows of corresponding fixing holes 24 are provided in the middle of the left supporting plate 21 and the right supporting plate 28. The fixing rod 26 passes through the corresponding fixing holes 24 to connect the two supporting plates. Multiple tensile specimens 27 can be hung on each fixing rod 26. Adjacent tensile specimens 27 are separated by isolation pads 23 to ensure that the specimens do not contact each other during the test and affect the test results. The left support plate 21 and the right support plate 28 are provided with solution flow holes 22 at the position where the tensile specimen 27 is suspended. The two sides of the tensile specimen bracket 11 are hollowed out, and the solution flow hole 22 is arranged in the middle, which can ensure that the solution is in full contact with the specimen during the test, reduce the error of the test result, and make the test result more accurate.

[0047] This device is generally used in harsh environments, such as high temperature acid and alkali environments. Therefore, in order to prevent gas or liquid leakage during long-term testing, a glass protective cover filled with sand can be added to the bottom to avoid damage to the instrument.

[0048] Compared with the conventional test, which has many test devices, cumbersome preparation and assembly process, low efficiency and increased uncertainty factors, the patent of the present invention optimizes the test facilities, realizes the compression permanent deformation and tensile test specimens 27 clamps are double-layer design, simplifies the test process and is easy to operate. In conventional tests, when long-term multiple sampling tests are carried out, a large amount of solution needs to be prepared to ensure that the test specimen is completely immersed in the medium, resulting in waste of chemicals. To solve this problem, the patent of the present invention adopts a double-layer design of the clamp, which reduces the amount of solution used and avoids the waste of chemicals.

[0049] The present invention provides a method for testing the permanent deformation and tensile immersion of rubber under compression, which comprises:

[0050] Step 1: Install the compression test device 10.

[0051] Step 1.1: The compression specimen 18 is placed between the middle support plate 13 and the upper fixing plate 12;

[0052] Step 1.2: Use fixing bolts B15 to pass through the limiting pads 17 to connect the upper fixing plate and the middle support plate 13;

[0053] Step 1.3: Use the fixing nut B19 to pre-tighten and make the upper fixing plate 12, the middle support plate 13 contact with the limit pad 17;

[0054] Step 1.4: The compression specimen 18 is placed between the middle support plate 13 and the lower fixing plate 14;

[0055] Step 1.5: According to the methods of step 1.2 and step 1.3, install the lower fixing plate 14 and the middle supporting plate 13.

[0056] Step 2: Install the tensile specimen support 11.

[0057] Step 2.1: Hang the tensile specimens 27 on the fixed rods 26 in sequence, and separate adjacent tensile specimens 27 with insulating pads;

[0058] Step 2.2: Insert the fixing rod 26 into the fixing holes 24 on the left and right support plates 28;

[0059] Step 2.3: Connect the upper and lower parts of the left support plate 21 and the right support plate 28 through the fixing screw 25 and the fixing nut C20.

[0060] Step 3: Immerse the compression test device 10 and the tensile specimen holder 11 and conduct the test.

[0061] Step 3.1: Place the compression test device 10 and the tensile specimen holder 11 into the liner 9 in sequence, add the required test solution, and ensure that the test solution completely immerses all specimens;

[0062] Step 3.2: Cover the liner 9 with the sealing cover 7 and put it into the reactor. Connect the reactor cover to the reactor cover connecting flange 4 through the fixing bolts A1 and the fixing nuts A2. Tighten the fixing bolts A1 and the fixing nuts A2 so that the reactor cover presses the liner 9 and the sealing cover 7 tightly.

[0063] The specific embodiments of the device proposed by the present invention are as follows:

[0064] First, install the compression test device 10. The fixing bolt B15 of the compression test device 10 should pass through the limit pad 17 and should be connected to the upper fixing plate 12 and the middle support plate 13. Use the fixing nut B19 for pre-tightening. Pre-tighten the fixing nut B19 to generate a pre-tightening force until the upper fixing plate 12 and the middle support plate 13 are in contact with the limit pad 17. The pre-tightening force can ensure that the specimen is stressed so that the compression strength of the specimen meets the test requirements. The lower fixing plate 14 can also be installed and disassembled according to this operation through the disassembly hole 16 reserved in the fixing plate. When sampling at different test cycles, the fixing nut B19 can be unscrewed through the disassembly hole 16, one side of the fixing plate can be removed, and then the compression specimen 18 can be removed. The fixing plate on the other side will not be affected and can continue to be placed in the reaction container for testing.

[0065] Secondly, install the tensile specimen support 11, which includes a base 29, a left support plate 21, and a support plate 28. A hole is opened on one side of the tensile specimen 27, and multiple tensile specimens 27 are sequentially installed on the fixing rod 26, each specimen is separated by an isolation pad 23, and then the fixing rod 26 is inserted into the fixing holes 24 on the left and right support plates 28. After all the specimens are installed, the upper and lower fixing screws 25 of the support plate are inserted, and then the fixing nuts C20 are tightened.

[0066] Finally, the installed compression test device 10 and tensile specimen holder 11 are placed in the liner 9 in sequence, and the required test solution is added to ensure that all specimens are completely immersed in the test solution. Then, the sealing cover 7 is covered, and the entire liner 9 is placed in the reactor 5. The reactor cover 3 is connected to the reactor cover connecting flange 4 by fixing bolts A1 and fixing nuts A2, and the reactor cover is tightened to press the liner sealing cover 7 by tightening the bolts and nuts. This device is generally used in harsh environments, such as high temperature acid and alkali environments, so in order to prevent gas or liquid leakage during long-term testing, a glass protective cover filled with sand can be added to the bottom to avoid damage to the instrument and equipment.

[0067] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A rubber compression permanent deformation and tensile immersion test device, characterized in that: The device comprises a reactor (5), an inner liner (9), a compression test device (10) and a tensile specimen support (11). The reactor (5) is provided with an inner liner (9), and the inner liner (9) is provided with the compression test device (10) and the tensile specimen support (11). The compression test device comprises an upper fixing plate (12), an intermediate support plate (13), a fixing bolt B (15), a fixing nut B (19) and a limiting pad (17). The upper fixing plate (12) and the intermediate support plate (13) are provided with a plurality of corresponding disassembly holes (16). The upper fixing plate (12) and the intermediate support plate (13) are connected by fixing bolts B (15) and fixing nuts B (19) provided in the disassembly holes (16). The fixing bolts B (15) are provided with a limiting pad (17). The compression specimen (18) is provided between the upper fixing plate (12) and the intermediate support plate (13). The tensile specimen support (11) is used for conducting a sample tensile test.

2. A rubber compression permanent deformation and tensile immersion test device according to claim 1, characterized in that: The reactor (5) is provided with a reactor cover on the top, and a reactor cover connecting flange (4) is provided on the top of the reactor (5). The reactor cover connecting flange (4) and the reactor cover (3) are connected by fixing bolts A (1) and fixing nuts A (2). The reactor (5) and the reactor cover are made of rigid metal material. An exhaust hole (6) is provided at the bottom of the reactor (5), and the exhaust hole (6) exhausts air when the liner (9) is placed in the reactor (5).

3. A rubber compression permanent deformation and tensile immersion test device according to claim 2, characterized in that: The liner (9) is cylindrical in shape, a sealing cover (7) is provided on the top of the liner (9), a sealing ring (8) is provided between the sealing cover (7) and the liner (9), and the sealing cover (7) and the sealing ring (8) are used to seal the liner (9).

4. A rubber compression permanent deformation and tensile immersion test device according to claim 3, characterized in that: The inner liner (9) is made of polytetrafluoroethylene, and the sealing cover (7) is made of a flexible material. The inner liner (9) and the sealing cover (7) are placed in the reaction kettle (5) and fit tightly together, and are higher than the reaction kettle (5). The kettle cover is pressed against the inner liner (9) and the sealing cover (7) by fixing bolts A (1) and fixing nuts A (2).

5. A rubber compression permanent deformation and tensile immersion test device according to claim 1, characterized in that: One side of the intermediate support plate (13) is connected to the upper fixing plate (12), and the other side of the intermediate support plate (13) is connected to the lower fixing plate (14). The lower fixing plate (14) and the intermediate support plate (13) are provided with a plurality of corresponding disassembly holes (16), and the fixing bolts B (15) are provided in the disassembly holes (16). The lower fixing plate (14) and the intermediate support plate (13) are connected via the fixing bolts B (15) and the fixing nuts B (19).

6. A rubber compression permanent deformation and tensile immersion test device according to claim 5, characterized in that: The upper fixing plate (12), the middle supporting plate (13) and the lower fixing plate (14) are cylindrical structures and are all made of polytetrafluoroethylene.

7. A rubber compression permanent deformation and tensile immersion test device according to claim 1, characterized in that: The tensile specimen support (11) comprises a base (29), a fixing rod (26), a left supporting plate (21) and a right supporting plate (28), wherein the left supporting plate (21) and the right supporting plate (28) are arranged in parallel and both are mounted on the base (29); the upper and lower parts of the left supporting plate (21) and the right supporting plate (28) are connected by fixing screws (25) and fixing nuts C (20); two rows of corresponding fixing holes (24) are arranged in the middle of the left supporting plate (21) and the right supporting plate (28), the fixing rod (26) passes through the corresponding fixing holes (24) to connect the two supporting plates, and a plurality of tensile specimens (27) are suspended and mounted on each fixing rod, and adjacent tensile specimens (27) are separated by insulating pads (23).

8. A rubber compression permanent deformation and tensile immersion test device according to claim 7, characterized in that: The tensile specimen support (11) is made of thick polytetrafluoroethylene, and the left support plate (21) and the right support plate (28) are provided with solution flow holes (22) at the position where the tensile specimen (27) is suspended, and the solution flow holes (22) allow the solution to fully contact the tensile specimen (27).

9. A rubber compression permanent deformation and tensile immersion test device according to claim 1, characterized in that: A glass protective cover containing sand is arranged at the bottom of the device to prevent leakage of gas or liquid.

10. A rubber compression permanent deformation and tensile immersion test method according to any one of claims 1 to 9, characterized in that: The method comprises: Step 1: Install the compression test device (10); Step 1.1: placing the compression specimen (18) between the middle support plate (13) and the upper fixing plate (12); Step 1.2: Use fixing bolts B (15) to pass through the limiting pads (17) to connect the upper fixing plate (12) and the middle supporting plate (13); Step 1.3: Use the fixing nut B (19) for pre-tightening to make the upper fixing plate (12), the middle supporting plate (13) and the limiting pad (17) contact each other; Step 1.4: placing the compression specimen (18) between the middle support plate (13) and the lower fixing plate (14); Step 1.5: According to the methods of step 1.2 and step 1.3, install the lower fixing plate (14) and the middle supporting plate (13); Step 2: Installing the tensile specimen support (11); Step 2.1: Suspending the tensile specimens (27) on the fixed rods in sequence, and separating the adjacent tensile specimens (27) with insulating pads; Step 2.2: Insert the fixing rod into the fixing holes (24) on the left and right support plates (28); Step 2.3: Connect the upper and lower parts of the left support plate and the right support plate (28) through the fixing screw (25) and the fixing nut C (20); Step 3: Immerse the compression test device (10) and the tensile specimen holder (11) and conduct the test; Step 3.1: Place the immersion compression test device (10) and the tensile specimen holder (11) into the liner (9) in sequence, add the required test solution, and ensure that the test solution completely immerses all specimens; Step 3.2: Cover the inner liner (9) with a sealing cover (7) and place it in a reactor (5), connect the reactor cover to the reactor cover connecting flange (4) through fixing bolts A (1) and fixing nuts A (2), and tighten the fixing bolts A (1) and the fixing nuts A (2) so that the reactor cover presses the inner liner (9) and the sealing cover (7) tightly.

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