A device for detecting the viscosity of a silicone sealant

Abstract

This invention discloses a viscosity testing device for silicone sealant, relating to the field of viscosity testing technology. It includes a support frame and a testing instrument fixedly connected to the top of the support frame. A hydraulic cylinder is mounted at the bottom of the testing instrument, and a connecting rod is fixedly connected to the output end of the hydraulic cylinder. A testing head for detecting the viscosity of the silicone sealant is mounted at the bottom of the connecting rod. This invention utilizes a negative pressure defoamer, causing a first piston block to be inserted into the barrel and seal it. As the first piston block continues to move downwards, air inside the barrel is pressured, pushing aside a second piston block and expelling it through an exhaust pipe. The gradual downward movement of the first piston block creates negative pressure inside the barrel, acting on the silicone sealant. This allows air bubbles inside the silicone sealant to be broken or expelled, improving the accuracy of subsequent viscosity testing.

Description

Technical Field

[0001] This invention relates to the field of viscosity testing technology, specifically to a viscosity testing device for silicone sealant. Background Technology

[0002] During the production, mixing, and sampling of silicone sealants, air bubbles are easily incorporated, directly affecting the accuracy of viscosity test results. Currently, traditional viscosity testing devices typically only have a testing function; the defoaming and testing processes are independent. Generally, silicone sealant samples need to be pre-treated through vacuum defoaming and static defoaming before being transferred to the testing cylinder for viscosity measurement.

[0003] In existing testing equipment, the barrel is mostly open or simply covered. When the test head is directly inserted into the rubber, it is impossible to perform sealed degassing and defoaming inside the barrel before testing. Some devices with auxiliary defoaming structures also have difficulty completing synchronous sealing, extrusion degassing and negative pressure defoaming in the same stroke of the test head, resulting in a cumbersome and time-consuming defoaming process. Furthermore, air is easily re-entered during sample transfer and opening, forming secondary bubbles, which still interferes with the viscosity testing accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a viscosity testing device for silicone sealant, which addresses the problem that existing testing equipment cannot seal, simultaneously expel air and defoam under negative pressure within the same stroke of the testing head, resulting in a cumbersome and time-consuming defoaming process, and the tendency for secondary bubbles to be generated during sample transfer and opening, which seriously affects the accuracy of viscosity testing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a silicone sealant viscosity testing device, comprising: The system includes a support frame and a testing instrument fixedly connected to the top of the support frame. A hydraulic cylinder is mounted on the bottom of the testing instrument, and a connecting rod is fixedly connected to the output end of the hydraulic cylinder. A testing head for detecting the viscosity of silicone sealant is mounted on the bottom of the connecting rod. A material cylinder is located on one side of the support frame and below the testing head. A negative pressure defoamer is located on the outer wall of the connecting rod and is used to defoam the silicone sealant inside the material cylinder before testing. The negative pressure defoamer includes a first piston block located inside the material cylinder and fitting into the cylinder. A sealing ring is provided at the contact point between the first piston block and the material cylinder for sealing. The first piston block compresses and defoams the inside of the material cylinder. A pressure regulator is located above the first piston block and is used to adjust the compression force of the first piston block, thereby coordinating with negative pressure venting inside the first piston block.

[0006] As a further embodiment of the present invention: the negative pressure defoamer further includes a connecting sleeve fixedly connected to the top of the first piston block, a piston sleeve slidably connected to the outer wall of the connecting sleeve, the piston sleeve fixedly connected to the outer wall of the connecting rod, a first auxiliary ring provided on the inner side of the piston sleeve, and a first connecting spring installed between the first auxiliary ring and the connecting sleeve, and a pressure-adjusting exhaust assembly installed at the exhaust port of the piston sleeve.

[0007] As a further embodiment of the present invention: a suspension frame is fixedly connected to the outer wall of the bracket, a T-shaped block is slidably connected to the inner side of the suspension frame, and the T-shaped block is fixedly connected to the piston sleeve, and the piston sleeve is slidably connected to the suspension frame through the T-shaped block.

[0008] As a further embodiment of the present invention: the pressure-adjusting exhaust assembly includes an exhaust valve housing fixedly connected to the exhaust port of the piston sleeve, a second piston block for sealing the exhaust port of the piston sleeve is provided on the inner side of the exhaust valve housing, a second auxiliary ring is provided on the inner side of the exhaust valve housing, and a second connecting spring is installed between the second piston block and the second auxiliary ring, and an exhaust pipe is fixedly connected to the exhaust port of the exhaust valve housing.

[0009] As a further embodiment of the present invention: the pressure-adjusting exhaust assembly further includes a spherical rod fixedly connected to the end of the second auxiliary ring, and one end of the spherical rod extends through to the outside of the second auxiliary ring and is slidably connected to the second auxiliary ring, and a drive rod for driving the spherical rod to move laterally is fixedly connected to the inner side of the suspension frame.

[0010] As a further aspect of the present invention: the surface of the drive rod is provided with multiple planes and inclined surfaces, and the multiple planes and multiple inclined surfaces alternately form a stepped ramp.

[0011] As a further embodiment of the present invention: a rectangular groove is provided on the inner side of the spherical rod, and a rectangular rod is fixedly connected to one side of the second piston block, and the rectangular rod is slidably connected to the inner side of the rectangular groove.

[0012] As a further embodiment of the present invention: the pressure regulator includes a sliding frame fixedly connected to the top of the first auxiliary ring, and one end of the sliding frame extends through to the outside of the piston sleeve and is slidably connected to the piston sleeve. A connecting column is fixedly connected to one side of the sliding frame, and a connecting frame is fixedly connected to the outer wall of the spherical rod. A drive frame is fixedly connected to one end of the connecting frame, and the drive frame is sleeved on the outer wall of the connecting column.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting a negative pressure defoamer, when the output end of the hydraulic cylinder drives the connecting rod to move downward, it drives the first piston block, causing the first piston block to insert into the material cylinder and seal the material cylinder. Then, as the first piston block continues to move downward, the air inside the material cylinder is pushed open by the pressure and discharged through the exhaust pipe. As the first piston block moves downward, a negative pressure is generated inside the material cylinder, which acts on the silicone sealant, thereby allowing the air bubbles inside the silicone sealant to be squeezed out or discharged, so as to improve the accuracy of subsequent viscosity testing. 2. The system achieves a multi-stage cycle of "pressure increase and pressure build-up - constant pressure exhaust" and pulsed compression-decompression changes through alternating inclined and flat stepped ramps. The exhaust opening pressure is gradually increased. First, the low-pressure stage discharges air and large air bubbles in the barrel and the adhesive. Then, the medium and high-pressure stages overcome the surface tension of ≤50μm microbubbles in the high-viscosity, high-thixotropic silicone sealant. The pulsed cycle of pressure build-up compression and pressure release expansion efficiently breaks up full-size bubbles, eliminating the interference of bubbles on the shear torque measurement of the detection head. This significantly improves the authenticity, accuracy and repeatability of the silicone sealant viscosity test data. 3. By setting a pressure regulator, the stable intermittent venting of the barrel and the insertion of the detection head into the rubber compound can be synchronized throughout the entire process when the ball rod runs to the last stage plane of the drive rod. This ensures that the barrel is always in a positive pressure sealed venting state throughout the entire process of the detection head insertion, completely eliminating the introduction of secondary air bubbles caused by inserting the detection head after degassing in the traditional process. At the same time, it achieves zero-delay switching from degassing to detection, which not only ensures the integrity of the degassing effect, but also avoids structural sedimentation caused by long-term static storage of the rubber compound, significantly improving the authenticity and repeatability of the viscosity test data of the silicone sealant. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 This is a cross-sectional view of the barrel of the present invention; Figure 4 This is a schematic diagram of the negative pressure defoamer structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the pressure regulator structure of the present invention; Figure 7 This is a cross-sectional view of the spherical rod of the present invention.

[0015] In the diagram: 1. Bracket; 2. Detector; 3. Hydraulic cylinder; 4. Connecting rod; 5. Material cylinder; 6. Suspension frame; 7. Piston sleeve; 8. Connecting sleeve; 9. First piston block; 10. Sliding frame; 11. Connecting column; 12. Drive frame; 13. Connecting frame; 14. Exhaust valve housing; 15. Drive rod; 16. Plane; 17. Inclined surface; 18. Detection head; 19. First auxiliary ring; 20. First connecting spring; 21. T-block; 22. Second piston block; 23. Second auxiliary ring; 24. Ball rod; 25. Second connecting spring; 26. Rectangular rod; 27. Exhaust pipe; 28. Rectangular groove. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0018] Please see Figures 1 to 7This embodiment provides a silicone sealant viscosity testing device, including: a bracket 1 and a testing instrument 2 fixedly connected to the top of the bracket 1. A hydraulic cylinder 3 is installed at the bottom of the testing instrument 2, and a connecting rod 4 is fixedly connected to the output end of the hydraulic cylinder 3. A testing head 18 for testing the viscosity of silicone sealant is installed at the bottom of the connecting rod 4; a material cylinder 5, which is disposed on one side of the bracket 1 and located below the testing head 18; and a negative pressure defoamer, located on the outer wall of the connecting rod 4, for defoaming the silicone sealant inside the material cylinder 5 before testing. The negative pressure defoamer includes a first piston block 9 disposed inside the material cylinder 5 and fitting with the material cylinder 5, and the contact portion between the first piston block 9 and the material cylinder 5... The position is provided with a sealing ring for sealing. The first piston block 9 performs compression and defoaming operation on the inside of the material cylinder 5. The negative pressure defoamer also includes a connecting sleeve 8 fixedly connected to the top of the first piston block 9. A piston sleeve 7 is slidably connected to the outer wall of the connecting sleeve 8. The piston sleeve 7 is fixedly connected to the outer wall of the connecting rod 4. A first auxiliary ring 19 is provided on the inner side of the piston sleeve 7, and a first connecting spring 20 is installed between the first auxiliary ring 19 and the connecting sleeve 8. A suspension frame 6 is fixedly connected to the outer wall of the bracket 1. A T-shaped block 21 is slidably connected to the inner side of the suspension frame 6, and the T-shaped block 21 is fixedly connected to the piston sleeve 7. The piston sleeve 7 is slidably connected to the suspension frame 6 through the T-shaped block 21. First, a clamping device for holding the material cylinder 5 is installed on the inner side of the bracket 1, which is located on the outer side of the material cylinder 5. The material cylinder 5 is positioned and clamped by the clamping device. Since this is existing technology, it is not described in detail in this solution. The connecting rod 4 is equipped with a drive motor for driving the detection head 18 to rotate. When the detection head 18 is inserted for detection, it rotates under the drive of the drive motor. This detection operation is existing technology, so it is not described in detail in this solution. When it is necessary to test the viscosity of the silicone sealant inside the barrel 5, the hydraulic cylinder 3 is started. The output end of the hydraulic cylinder 3 drives the connecting rod 4 to move the detection head 18 downward and insert it into the barrel 5 to test the viscosity of the silicone sealant inside the barrel 5. A laser rangefinder is installed at the bottom of the first piston block 9 so that the first piston block 9 can descend to the designated position without contacting the silicone sealant. The piston descent position can be precisely controlled to ensure that the piston does not contact or disturb the test material during the defoaming process, thus avoiding premature application of shear force to the material and causing changes in its rheological properties, and further ensuring the authenticity of the test results. When the output end of the hydraulic cylinder 3 drives the connecting rod 4 to move downward, it drives the first piston block 9, causing the first piston block 9 to be inserted into the material cylinder 5 and seal the material cylinder 5. Then, as the first piston block 9 continues to move downward, the air inside the material cylinder 5 is pushed open by the pressure and discharged through the exhaust pipe 27. As the first piston block 9 moves downward, a negative pressure is generated inside the material cylinder 5, which acts on the silicone sealant, thereby allowing the air bubbles inside the silicone sealant to be squeezed out or discharged, so as to improve the accuracy of subsequent viscosity testing. Microbubbles inside silicone sealants (especially high-viscosity systems) can cause distortion in torque measurement, large data dispersion, and false values ​​when the detection head rotates and shears. The device forms a sealed cavity inside the barrel 5 through the first piston block 9. With the piston moving down step by step, it squeezes the bottom of the device, which is equipped with a negative pressure exhaust device for detecting the viscosity of silicone sealants. This can efficiently break and expel the microbubbles inside the sealant, completely eliminating the interference of bubbles on the shear force detection and ensuring that the test data truly reflects the actual rheological properties of the sealant.

[0019] Please see Figures 2-7 A pressure-adjusting exhaust assembly is installed at the exhaust port of the piston sleeve 7. The pressure-adjusting exhaust assembly includes an exhaust valve housing 14 fixedly connected to the exhaust port of the piston sleeve 7. A second piston block 22 for sealing the exhaust port of the piston sleeve 7 is provided on the inner side of the exhaust valve housing 14. A second auxiliary ring 23 is provided on the inner side of the exhaust valve housing 14, and a second connecting spring 25 is installed between the second piston block 22 and the second auxiliary ring 23. An exhaust pipe 27 is fixedly connected to the exhaust port of the exhaust valve housing 14. The pressure-adjusting exhaust assembly also includes a pipe fixedly connected to the second auxiliary ring 23. The ball-shaped rod 24 at the end, with one end of the ball-shaped rod 24 penetrating to the outside of the second auxiliary ring 23 and slidably connected to the second auxiliary ring 23, is fixedly connected to the inner side of the suspension frame 6. A drive rod 15 for driving the ball-shaped rod 24 to move laterally is fixedly connected to the inner side of the suspension frame 6. The surface of the drive rod 15 is provided with multiple planes 16 and inclined planes 17. The multiple planes 16 and multiple inclined planes 17 alternately form a stepped ramp. A rectangular groove 28 is opened on the inner side of the ball-shaped rod 24. A rectangular rod 26 is fixedly connected to one side of the second piston block 22, and the rectangular rod 26 is slidably connected to the inner side of the rectangular groove 28. When the first piston block 9 moves downward a certain distance initially, and continues to move downward, the ball rod 24 moves along the plane 16 towards the inclined plane 17. Under the action of the inclined plane 17, the ball rod 24 pushes the second auxiliary ring 23 to squeeze the second connecting spring 25, increasing the squeezing force on the second piston block 22. As the first piston block 9 continues to move downward, the pressure on the second piston block 22 increases, and the pressure inside the barrel 5 is less than that of the second piston block 22, so the second piston block 22 does not open and is compressed by the first piston block 9. When the ball rod 24 separates from the inclined plane 17 and contacts another plane 16, the pressure inside the barrel 5 is greater than that of the second connecting spring 25 as the first piston block 9 continues to move downward, thus pushing the second piston block 22 to perform the exhaust operation. Since the multiple planes 16 and the inclined plane 17 are arranged in a stepped combination, the exhaust of the first piston block 9 during its movement inside the barrel 5 is intermittent. The system utilizes alternating stepped ramps (slope 17 and plane 16) to achieve a multi-stage cycle of "pressure increase and pressure build-up - constant pressure exhaust." The exhaust opening pressure at each stage increases progressively with the downward stroke, creating a pulsed pressure change of "compression and pressure release." In silicone sealants (especially high-viscosity, high-thixotropic systems), large air bubbles with low surface tension are easily expelled, while microbubbles with a diameter ≤50μm are difficult to break down using conventional constant pressure exhaust due to their high surface tension. This is the core reason for distorted detection torque and data dispersion. Therefore, the system first exhausts air and large air bubbles from the barrel and the sealant through a low-pressure stage, and then progressively increases the pressure difference through medium and high-pressure stages to overcome the surface tension of the microbubbles. The pressure build-up process at each stage fully compresses the bubbles, and the sudden pressure drop during exhaust causes the bubbles to expand and burst rapidly. This pulsed pressure cycle is far more efficient at breaking down microbubbles than continuous constant pressure exhaust, completely eliminating full-size air bubbles in the sealant and completely removing interference from bubbles on the shear torque measurement of the detection head. This significantly improves the authenticity, accuracy, and repeatability of viscosity detection data. When the pressure inside the barrel exceeds the preload of the current stage spring, the exhaust valve opens briefly to release air. After the pressure drops, it automatically resets and seals immediately. The entire process is an intermittent pulse flow, not a continuous flow. Furthermore, the exhaust opening pressure dynamically increases with the stroke, automatically matching the characteristics of the adhesive. This is particularly beneficial for low-viscosity silicone sealants: continuous pressurization / negative pressure venting easily causes the adhesive to be carried away by the airflow and overflow from the exhaust pipe, contaminating the equipment and damaging the sample. This component's intermittent venting avoids continuous airflow disturbance, and most of the venting is completed at low pressure in the first few stages, preventing excessive pressure differentials and fundamentally avoiding overflow and adhesive suction problems. For high-viscosity / ultra-high-viscosity silicone sealants: the pressure can automatically increase stepwise to the high-pressure stage with the downward stroke, ensuring sufficient pressure differential to break microbubbles. No manual parameter changes or equipment adjustments are required, achieving seamless compatibility with all types of silicone sealants from low to ultra-high viscosity, thereby improving the overall practicality of the device.

[0020] Please see Figures 2-6 The pressure regulator includes a sliding frame 10 fixedly connected to the top of the first auxiliary ring 19, and one end of the sliding frame 10 extends through to the outside of the piston sleeve 7 and is slidably connected to the piston sleeve 7. A connecting post 11 is fixedly connected to one side of the sliding frame 10, and a connecting frame 13 is fixedly connected to the outer wall of the ball rod 24. A drive frame 12 is fixedly connected to one end of the connecting frame 13, and the drive frame 12 is sleeved on the outer wall of the connecting post 11. As the ball rod 24 moves toward the exhaust valve housing 14, it drives the connecting frame 13 to move synchronously. This pushes the connecting column 11 through the inclined groove inside the drive frame 12, causing the sliding frame 10 to move downward. This causes the first auxiliary ring 19 to move downward, increasing the pressure on the first connecting spring 20. As the pressure on the inside of the barrel 5 gradually increases, the spring force coefficient of the first connecting spring 20 gradually increases, allowing the piston sleeve 7 to maintain its initial state. When the ball rod 24 abuts against the last plane 16 inside the drive rod 15, the first piston block 9 continues to move downward while the inside of the barrel 5 is simultaneously vented. At this time, the detection head 18 can be gradually inserted into the silicone sealant inside the barrel 5 for detection. While the ball-shaped rod 24 adjusts the pressure laterally (compressing the second connecting spring 25 and increasing the exhaust opening pressure), the sliding frame 10 and the first auxiliary ring 19 are simultaneously pushed downwards through the wedge mechanism of the connecting frame 13 and the drive frame 12, linearly increasing the preload of the first connecting spring 20. During the defoaming process of the silicone sealant, the internal pressure of the barrel increases step by step. If the piston clamping force is insufficient, the piston will be pushed up by the internal pressure, the sealing surface will detach and leak air, directly leading to defoaming failure and the inability to build up pressure. This structure realizes that with each increase in exhaust opening pressure, the piston's sealing clamping force increases by one level, completely offsetting the reverse thrust of the barrel pressure on the piston, ensuring that the sealing ring between the first piston block 9 and the inner wall of the barrel 5 is tightly fitted throughout the process, without leakage or movement, ensuring that the defoaming pressure at each level can be accurately built up, and completely solving the sealing failure problem during high-pressure defoaming. When the spherical rod 24 reaches the last stage plane 16 of the drive rod 15, the barrel 5 enters a stable intermittent venting state. The detection head 18 is simultaneously and gradually inserted into the rubber compound to complete the viscosity test. The defoaming tail end and the detection insertion are carried out synchronously. In the traditional detection process, after defoaming, the barrel needs to be opened to insert the detection head. This process will inevitably introduce outside air and generate new microbubbles, directly causing the previous defoaming effect to fail. By using a pressure regulator, the barrel 5 is always in a positive pressure sealed venting state throughout the entire insertion process of the detection head. Outside air cannot enter the barrel at all, which completely eliminates the introduction of secondary bubbles when the detection head is inserted. At the same time, the detection insertion and the final venting are completed synchronously without additional waiting time, realizing zero-delay switching from defoaming to detection. This not only ensures the integrity of the defoaming effect, but also avoids structural sedimentation caused by long-term static storage of the rubber compound, further improving the authenticity and repeatability of the test data.

[0021] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting the viscosity of silicone sealant, characterized in that, include: The bracket (1) and the detector (2) fixedly connected to the top of the bracket (1) are provided. A hydraulic cylinder (3) is installed at the bottom of the detector (2). A connecting rod (4) is fixedly connected to the output end of the hydraulic cylinder (3). A detection head (18) for detecting the viscosity of silicone sealant is installed at the bottom of the connecting rod (4). The material cylinder (5) is disposed on one side of the bracket (1) and located below the detection head (18); The negative pressure defoamer is located on the outer wall of the connecting rod (4) and is used to defoam the silicone sealant inside the barrel (5) before testing. The negative pressure defoamer includes a first piston block (9) disposed inside the barrel (5) and fitting with the barrel (5). A sealing ring for sealing is provided at the contact part between the first piston block (9) and the barrel (5). The first piston block (9) performs compression and defoaming operation inside the barrel (5). The pressure regulator is located above the first piston block (9) and is used to adjust the squeezing force of the first piston block (9) in order to cooperate with the negative pressure exhaust of the first piston block (9).

2. The organosilicon sealant viscosity testing device according to claim 1, characterized in that, The negative pressure defoamer also includes a connecting sleeve (8) fixedly connected to the top of the first piston block (9). A piston sleeve (7) is slidably connected to the outer wall of the connecting sleeve (8). The piston sleeve (7) is fixedly connected to the outer wall of the connecting rod (4). A first auxiliary ring (19) is provided on the inner side of the piston sleeve (7). A first connecting spring (20) is installed between the first auxiliary ring (19) and the connecting sleeve (8). A pressure-appropriate exhaust assembly is installed at the exhaust port of the piston sleeve (7).

3. The organosilicon sealant viscosity testing device according to claim 2, characterized in that, The bracket (1) is fixedly connected to the outer wall of the bracket (6), and a T-shaped block (21) is slidably connected to the inner side of the bracket (6). The T-shaped block (21) is fixedly connected to the piston sleeve (7), and the piston sleeve (7) is slidably connected to the bracket (6) through the T-shaped block (21).

4. The organosilicon sealant viscosity testing device according to claim 3, characterized in that, The pressure-adjustable exhaust assembly includes an exhaust valve housing (14) fixedly connected to the exhaust port of the piston sleeve (7). The inner side of the exhaust valve housing (14) is provided with a second piston block (22) for sealing the exhaust port of the piston sleeve (7). The inner side of the exhaust valve housing (14) is provided with a second auxiliary ring (23), and a second connecting spring (25) is installed between the second piston block (22) and the second auxiliary ring (23). An exhaust pipe (27) is fixedly connected to the exhaust port of the exhaust valve housing (14).

5. The organosilicon sealant viscosity testing device according to claim 4, characterized in that, The pressure relief assembly also includes a spherical rod (24) fixedly connected to the end of the second auxiliary ring (23), and one end of the spherical rod (24) extends through to the outside of the second auxiliary ring (23) and is slidably connected to the second auxiliary ring (23). The inner side of the suspension frame (6) is fixedly connected to a drive rod (15) for driving the spherical rod (24) to move laterally.

6. The organosilicon sealant viscosity testing device according to claim 5, characterized in that, The surface of the drive rod (15) is provided with multiple planes (16) and inclined planes (17), and the multiple planes (16) and the multiple inclined planes (17) alternately form a stepped ramp.

7. The organosilicon sealant viscosity testing device according to claim 5, characterized in that, The inner side of the spherical rod (24) is provided with a rectangular groove (28), and a rectangular rod (26) is fixedly connected to one side of the second piston block (22), and the rectangular rod (26) is slidably connected to the inner side of the rectangular groove (28).

8. The organosilicon sealant viscosity testing device according to claim 5, characterized in that, The pressure regulator includes a sliding frame (10) fixedly connected to the top of the first auxiliary ring (19), and one end of the sliding frame (10) extends through to the outside of the piston sleeve (7) and is slidably connected to the piston sleeve (7). A connecting column (11) is fixedly connected to one side of the sliding frame (10), and a connecting frame (13) is fixedly connected to the outer wall of the spherical rod (24). A drive frame (12) is fixedly connected to one end of the connecting frame (13), and the drive frame (12) is sleeved on the outer wall of the connecting column (11).

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