Mechanical property detection device for rubber ring in high temperature environment

Abstract

The application discloses a rubber ring mechanical property detection device for high-temperature environment, belongs to the technical field of pipeline sealing performance detection equipment, and comprises a socket simulation cavity formed by an inner wall and enclosing a detection cavity, a socket simulation cavity side is provided with a socket simulation part and a pressure maintaining mechanism, a plurality of film pressure sensors are embedded in the inner wall of the socket simulation cavity, are distributed in multiple sections in the axial direction and cover the top and bottom positions of the sealing surface in the circumferential direction, and an environment simulation system comprising a sealed environment box is arranged outside the socket simulation cavity, and a heating unit and a humidity adjusting unit are integrated in the box. The application can restore the real compression state of the pipeline interface, realize in-situ detection of the contact stress of the full sealing surface under complex environments such as high temperature, and is suitable for mechanical property and sealing life evaluation of the rubber sealing ring of the nodular cast iron pipe.

Description

Technical Field

[0001] This invention relates to the technical field of pipeline sealing performance testing equipment, and in particular to a device for testing the mechanical properties of rubber rings under high-temperature environments. Background Technology

[0002] Ductile iron pipes are the core pipe materials for municipal pipeline systems such as urban water supply and gas transmission. The rubber sealing rings at their joints are key components that ensure the sealing performance of the pipeline and prevent media leakage.

[0003] In actual service, rubber seals are under compression for a long time and are also subject to the combined effects of multiple factors such as changes in ambient temperature, moisture erosion, and salt and alkali corrosion. The rubber material will gradually age and the stress will relax, resulting in a decrease in sealing contact stress and even the appearance of local zero stress areas, which will eventually lead to interface leakage.

[0004] In existing technologies, the mechanical properties of rubber rings are mostly tested using general-purpose compression testing equipment. This type of equipment can only perform flat-plate compression tests on rubber samples and cannot reproduce the special cross-sectional profile of the sealing cavity of ductile iron pipe sockets and the actual assembly compression shape. The stress data obtained from the tests deviates significantly from the actual service conditions of the pipe joints and cannot accurately reflect the differences in circumferential stress distribution and axial stress variation of the sealing surface. At the same time, most existing testing devices can only conduct static tests under normal temperature and pressure conditions and cannot simulate actual service environments such as high temperature, high humidity, and salt spray. It is difficult to continuously monitor the in-situ stress of the entire sealing surface of the rubber ring under environmental coupling effects, and it cannot capture the attenuation process of contact stress and the evolution of local failures during environmental aging of the rubber ring. Therefore, it is difficult to support the evaluation and verification of the long-term sealing performance of pipe joints. Summary of the Invention

[0005] The purpose of this invention is to address the technical shortcomings of existing rubber ring mechanical performance testing equipment, which cannot reproduce the actual assembly shape of pipe interfaces and is difficult to achieve continuous in-situ stress monitoring of the entire sealing surface under complex service environments such as high temperatures. This invention provides a rubber ring mechanical performance testing device for high-temperature environments. Through the integrated design of a simulated structure of the actual interface contour and a multi-environment coupling simulation system, it reproduces the actual service conditions of the rubber ring, achieving in-situ detection of sealing contact stress and monitoring of decay patterns, thus providing reliable technical support for the evaluation of pipe interface sealing performance and life verification.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: According to one aspect of the present invention, a device for testing the mechanical properties of rubber rings under high temperature environments is provided, including a socket simulation cavity, wherein the inner wall surface of the socket simulation cavity forms a testing cavity, a socket simulation element is disposed on one side of the socket simulation cavity, and a pressure holding mechanism is disposed on the side of the socket simulation element away from the socket simulation cavity for driving the socket simulation element axially into the testing cavity and maintaining a compressed state. The inner wall of the socket simulation cavity is provided with multiple preset shallow grooves, and each preset shallow groove is embedded with a thin film pressure sensor. The sensing surface of each thin film pressure sensor is flush with the inner wall of the socket simulation cavity. The multiple thin film pressure sensors are distributed in at least two different axial sections on the inner wall. The multiple thin film pressure sensors in each axial section are arranged circumferentially on the inner wall and at least cover the top and bottom contact surfaces of the rubber ring under test after compression. They are used to measure the contact pressure at each position of the sealing surface of the rubber ring under test under compression. An environmental simulation system is provided outside the socket simulation cavity. The environmental simulation system includes a sealed environment box. The socket simulation cavity and the spigot simulation component are both located inside the sealed environment box. A heating unit is provided on the inner wall of the sealed environment box, and a humidity regulating unit is provided on the side wall of the sealed environment box.

[0007] Preferably, the pressure holding mechanism includes a fixed frame, on which a guide assembly extending axially is provided, and a connecting slide is slidably mounted on the guide assembly. The connecting slide is fixedly connected to the end of the socket simulation component, and a servo electric cylinder is fixed to the end of the fixed frame. The output end of the servo electric cylinder is drivenly connected to the connecting slide to drive the socket simulation component together with the rubber ring to be tested mounted thereon to be pushed axially into the detection cavity of the socket simulation cavity, so that the rubber ring to be tested is radially compressed between the outer peripheral surface of the socket simulation component and the inner wall surface of the socket simulation cavity, and the compressed state is maintained after reaching a predetermined position.

[0008] Preferably, the heating unit includes an electric heating element and a circulating fan blade. The electric heating element is fixed to the inner wall of the sealed environment chamber, and the circulating fan blade is arranged in conjunction with the electric heating element to drive the formation of a hot circulating airflow within the chamber.

[0009] Preferably, the humidity control unit includes a humidification interface and a dehumidification interface, both of which are located on the side wall of the sealed environment enclosure and are used to connect external humidification and dehumidification devices, respectively.

[0010] Preferably, a salt spray unit is provided on the top of the sealed environment chamber. The salt spray unit includes a spray main pipe and several atomizing nozzles. The atomizing nozzles are arranged facing the opening of the detection chamber and are used to apply a salt spray environment to the inside of the detection chamber.

[0011] Preferably, the socket simulation cavity is composed of an upper half and a lower half, and a sealing gasket is provided on the splicing surface of the upper half and the lower half, and a detachable connection is achieved by fasteners.

[0012] Preferably, the wall of the socket simulation cavity is internally machined with a serpentine channel, which allows for the flow of circulating heat transfer medium. Both ends of the serpentine channel are provided with interfaces for connection to an external circulating temperature control device, so as to uniformly heat or cool the socket simulation cavity through the constant temperature medium flowing through the serpentine channel.

[0013] Preferably, the thin-film pressure sensor is fixed in the preset shallow groove by high-temperature resistant sealant, and the lead wire on the back of the thin-film pressure sensor is led out to the outside through the lead wire hole in the wall of the socket simulated cavity, and the lead wire hole is filled with the high-temperature resistant sealant.

[0014] Preferably, the leads of all the thin-film pressure sensors converge inside the wall of the socket simulation cavity and are connected to an external data acquisition system through a sealed connector disposed on the outer wall of the socket simulation cavity.

[0015] Preferably, a transparent observation window is provided on the wall of the socket simulation cavity, and the position of the transparent observation window corresponds to the sealing surface area of ​​the rubber ring under test after compression.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This invention replicates the cross-sectional shape of the sealing cavity of a ductile iron pipe socket using a simulated socket cavity. Combined with a socket simulation component corresponding to the socket contour, it restores the actual assembly and compression state of the rubber ring, ensuring a high degree of consistency between the testing conditions and real service conditions. Thin-film pressure sensors distributed across multiple axial sections and covering the top and bottom of the sealing surface can collect contact stress data across the entire sealing ring surface of the rubber ring, capturing the circumferential stress distribution differences and axial stress variation patterns, avoiding missed detections of localized stress failures. Combined with a heating, humidity control, and salt spray unit integrated into a sealed environment enclosure, it can simultaneously apply complex environmental conditions such as high temperature, high humidity, and salt spray during testing, achieving in-situ continuous monitoring of sealing stress under complex service environments. This allows for the acquisition of the rubber ring stress decay pattern under environmental influences, enhancing the engineering reference value of the test results and providing reliable data support for evaluating the sealing performance of pipe interfaces.

[0017] 2. This invention utilizes a modular socket-type simulated cavity structure to facilitate the installation and positioning of the rubber ring under test, as well as its disassembly and cleaning after the test. The serpentine channel within the cavity wall allows for uniform temperature control, resulting in a more uniform temperature field inside the detection cavity. This prevents localized temperature differences from affecting the performance of the rubber ring, further ensuring the accuracy of environmental simulation. The sensor employs a high-temperature resistant sealant embedding and lead wire sealing structure, ensuring that the sensor sensing surface is flush with the inner wall of the cavity, preventing interference with the compression shape of the rubber ring, and isolating environmental media from intruding into the cavity wall, protecting the sensing circuitry and improving the device's operational stability in high-humidity and salt spray environments. Combined with a transparent observation window on the cavity wall, the deformation state of the rubber ring can be directly observed during the test. The entire device, while achieving realistic working condition simulation and full-section stress detection, further ensures the reliability of test operation in complex environments, significantly improving the device's applicability and testing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sealed environment enclosure in this invention; Figure 3 This is a schematic diagram of the centrifugal fabric distribution mechanism in this invention; Figure 4 This is a schematic diagram of the drive unit in the present invention; Figure 5 This is a schematic diagram of the centrifugal disc in this invention; Figure 6 This is a schematic diagram of the negative pressure mechanism in this invention; Figure 7 This is a schematic diagram of the reflux condensation unit structure in this invention; Figure 8 This is a schematic diagram of the discharge structure of the closed tank in this invention.

[0019] In the attached diagram: 1. Socket simulation cavity; 11. Sealed connector; 12. Preset shallow groove; 13. Upper body; 14. Lower body; 15. Sealing gasket; 16. Fastener; 17. Lead wire hole; 18. High-temperature resistant sealant; 2. Socket simulation component; 3. Thin-film pressure sensor; 4. Pressure holding mechanism; 41. Fixed frame; 42. Guide assembly; 43. Connecting slide; 44. Servo electric cylinder; 5. Sealed environment chamber; 6. Heating unit; 61. Electric heating element; 62. Circulating fan blade; 7. Humidity adjustment unit; 71. Humidification interface; 72. Dehumidification interface; 8. Salt spray unit; 81. Spray main pipe; 82. Atomizing nozzle; 9. Serpentine channel; 10. Transparent observation window. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the invention, and these aspects of the invention can be achieved even without these specific details.

[0021] Please see Figures 1 to 8 This invention provides a device for testing the mechanical properties of rubber rings under high-temperature environments, and the technical solution is as follows: In an embodiment of the present invention, the detection chamber is a cavity structure with a single-sided opening. Its internal cross-sectional profile is completely consistent with the cross-sectional profile of the ductile iron pipe socket sealing cavity to which the rubber ring to be tested is adapted. This can restore the assembly compression space of the rubber ring in the actual pipeline. A socket simulation component 2 is provided on one side of the socket simulation cavity 1. A pressure holding mechanism 4 is provided on the side of the socket simulation component 2 away from the socket simulation cavity 1 to drive the socket simulation component 2 axially into the detection chamber and maintain the compression state.

[0022] In an embodiment of the present invention, the pressure holding mechanism 4 includes a fixed frame 41, on which a guide component 42 extending axially is provided, and a connecting slide 43 is slidably mounted on the guide component 42. The connecting slide 43 is fixedly connected to the end of the socket simulation component 2. A servo electric cylinder 44 is fixedly mounted at the end of the fixed frame 41. The output end of the servo electric cylinder 44 is drivenly connected to the connecting slide 43 to drive the socket simulation component 2 together with the rubber ring to be tested mounted thereon to be pushed axially into the detection cavity of the socket simulation cavity 1, so that the rubber ring to be tested is radially compressed between the outer peripheral surface of the socket simulation component 2 and the inner wall surface of the socket simulation cavity 1, and the compressed state is maintained after reaching the predetermined position.

[0023] In an embodiment of the present invention, the outer peripheral surface contour of the socket simulation component 2 is consistent with the outer wall surface contour of the corresponding ductile iron pipe socket, and an annular positioning groove is provided on its outer peripheral surface for positioning the rubber ring to be tested, which can stably clamp the rubber ring to be tested in a preset position to ensure that the rubber ring does not shift or fall off during the pushing process. The inner wall of the socket simulation cavity 1 is provided with a plurality of preset shallow grooves 12, and each preset shallow groove 12 is respectively embedded with a thin film pressure sensor 3. The sensing surface of each thin film pressure sensor 3 is flush with the inner wall of the socket simulation cavity 1. The plurality of thin film pressure sensors 3 are distributed in at least two different axial sections along the axial direction of the inner wall. The plurality of thin film pressure sensors 3 in each axial section are arranged circumferentially along the inner wall and at least cover the top contact surface and bottom contact surface of the rubber ring under test after compression, for measuring the contact pressure at each position of the sealing surface under the compressed state of the rubber ring under test. The depth of the preset shallow groove 12 is matched with the thickness of the thin film pressure sensor 3, ensuring a smooth transition between the sensing surface and the inner wall of the cavity after the sensor is installed, without causing additional interference to the compression deformation of the rubber ring. The multi-section and top-bottom full-coverage layout can completely collect the stress distribution data of the sealing surface in the circumferential and axial directions, avoiding the omission of local stress anomalies.

[0024] In an embodiment of the present invention, an environmental simulation system is provided outside the socket simulation cavity 1. The environmental simulation system includes a sealed environment box 5. The socket simulation cavity 1 and the spigot simulation component 2 are both located inside the sealed environment box 5. A heating unit 6 is provided on the inner wall of the sealed environment box 5, and a humidity regulating unit 7 is provided on the side wall of the sealed environment box 5. The sealed environment chamber 5 is a closed chamber with sealing and heat insulation performance, which can maintain the stability of the internal environmental conditions and avoid interference from the external environment with the test results. The socket simulation cavity 1 is fixedly installed on the bottom wall inside the sealed environment chamber 5. The socket simulation component 2 and the transmission end of the mechanical loading mechanism are inserted into the chamber, and the joint is sealed to ensure the airtightness of the chamber. The fixed frame 41 is fixedly installed on the outside of the sealed environment box 5, providing a stable installation base for the entire loading mechanism. The guide component 42 is arranged parallel to the axis of the plug simulation component 2, which can limit the radial movement of the connecting slide 43, ensuring that the plug simulation component 2 is always pushed smoothly along the axis, avoiding uneven compression of the rubber ring due to skew, which would affect the accuracy of the test. The servo electric cylinder 44 has a position self-locking function, which can automatically lock after reaching the preset compression position, maintaining a stable compression state for a long time and meeting the needs of long-term aging test. The heating unit 6 includes an electric heating element 61 and a circulating fan blade 62. The electric heating element 61 is fixed to the inner wall of the sealed environment box 5. The circulating fan blade 62 is arranged in conjunction with the electric heating element 61 to drive the formation of a hot airflow inside the box. The electric heating element 61 is arranged on the inner side wall of the sealed environment box 5. The circulating fan blade 62 can drive the air inside the box to circulate, so that the temperature inside the box is uniform and consistent, avoiding uneven impact of local temperature differences on the performance of the rubber ring, and ensuring the uniformity and stability of the ambient temperature. The humidity control unit 7 includes a humidification interface 71 and a dehumidification interface 72. Both the humidification interface 71 and the dehumidification interface 72 are located on the side wall of the sealed environment chamber 5 and are used to connect external humidification equipment and dehumidification equipment, respectively. Both the humidification interface 71 and the dehumidification interface 72 are equipped with sealed connectors. After connecting external equipment, the air humidity inside the sealed environment chamber 5 can be flexibly adjusted to simulate service environments with different humidity levels and adapt to different test requirements.

[0025] In an embodiment of the present invention, a salt spraying unit 8 is provided on the top of the sealed environment chamber 5. The salt spraying unit 8 includes a spray main pipe 81 and a plurality of atomizing nozzles 82. The atomizing nozzles 82 are arranged facing the opening of the detection chamber and are used to apply a salt spray environment to the inside of the detection chamber. The spray main pipe 81 extends along the inner wall of the top of the sealed environment chamber 5. The plurality of atomizing nozzles 82 are evenly arranged along the axial direction of the spray main pipe 81, so that the salt spray can be evenly sprayed to the detection chamber and the area where the rubber ring is located, simulating the service environment of salt and alkali corrosion and meeting the performance testing requirements under salt spray coupling.

[0026] In an embodiment of the present invention, the socket simulation cavity 1 is composed of an upper half 13 and a lower half 14. A sealing gasket 15 is provided on the joint surface of the two and they are detachably connected by fasteners 16. The upper half 13 and the lower half 14 are assembled along the horizontal central axis of the cavity. The sealing gasket 15 between the joint surfaces can fill the joint gap, ensuring that the inner wall of the detection cavity is smooth and continuous. At the same time, it prevents the environmental medium outside the cavity from entering the cavity from the joint and affecting the detection. The detachable joint structure facilitates the cleaning of the cavity, the inspection and maintenance of the sensor, and the installation and positioning of the rubber ring to be tested.

[0027] In an embodiment of the present invention, a serpentine channel 9 is machined inside the wall of the socket simulation cavity 1. The serpentine channel 9 allows for the flow of circulating heat-conducting medium. Both ends of the serpentine channel 9 are provided with interfaces for connection to an external circulating temperature control device. The constant temperature medium flowing through the channel can uniformly heat or cool the cavity. The serpentine channel 9 extends axially along the cavity and is evenly distributed throughout the entire wall thickness of the cavity. The circulating heat-conducting medium can uniformly regulate the temperature of the cavity wall, making the temperature of the inner wall of the detection cavity uniform and stable. Combined with the air heating inside the chamber, it can achieve a uniform temperature effect on the rubber ring. The thin-film pressure sensor 3 is fixed in the preset shallow groove 12 by high-temperature resistant sealant 18. The lead wire on the back of the sensor is led out to the outside through the lead wire hole 17 in the cavity wall. The lead wire hole 17 is filled with high-temperature resistant sealant 18. The high-temperature resistant sealant 18 can not only firmly fix the sensor in the shallow groove, but also fill the gap between the sensor and the shallow groove, ensuring the smoothness of the inner wall of the cavity, and at the same time play a role in sealing and waterproofing, preventing salt spray and moisture from entering the lead hole 17 through the gap, and protecting the sensing circuit from corrosion.

[0028] In an embodiment of the present invention, the leads of all sensors converge inside the wall of the socket simulation cavity 1 and are connected to an external data acquisition system through a sealing connector 11 disposed on the outer wall of the cavity.

[0029] In an embodiment of the present invention, a sealed connector is fixedly installed on the outer wall of the socket simulation cavity 1, which has sealing and protective performance, enabling rapid docking of internal sensing leads and external acquisition lines, while ensuring the sealing performance at the docking point, preventing the intrusion of environmental media, and improving the operational reliability of the device in complex environments.

[0030] In an embodiment of the present invention, a transparent observation window 10 is provided on the wall of the socket simulation cavity 1. The position of the transparent observation window 10 corresponds to the sealing surface area of ​​the rubber ring under test after compression. The transparent observation window 10 is made of a transparent material that is resistant to high temperature and corrosion and is sealed and fitted with the cavity wall. The test personnel can directly observe the compression deformation state of the rubber ring in the cavity through the observation window, intuitively capture abnormal phenomena such as extrusion and cracking of the rubber ring, and realize the synchronous observation of stress data and appearance morphology.

[0031] Combination Figures 1 to 8 The specific usage process of the rubber ring mechanical property testing device for high-temperature environments in this embodiment is as follows: During the test preparation stage, the upper half 13 and the lower half 14 of the socket simulation cavity 1 are disassembled. The rubber ring to be tested is installed in the positioning groove on the outer periphery of the socket simulation part 2. After adjusting the position, the socket simulation cavity 1 is assembled and locked and fixed by fasteners 16. The sealing gasket 15 on the splicing surface ensures the sealing of the cavity, and the sample installation is completed. When the pressure holding mechanism 4 is activated, the servo electric cylinder 44 outputs axial thrust, which drives the spigot simulation component 2 to move smoothly along the guide component 42 through the connecting slide 43. The spigot simulation component 2 with rubber ring is pushed into the detection cavity of the socket simulation cavity 1, so that the rubber ring is radially compressed to the preset assembly state between the outer circumferential surface of the spigot simulation component 2 and the inner wall of the socket simulation cavity 1. After reaching the predetermined position, the servo electric cylinder 44 automatically locks, maintaining the compressed state of the rubber ring for a long time, simulating the actual service stress conditions of the pipe interface. During the environmental simulation phase, the corresponding environmental units are activated according to the test requirements: the heating unit 6 is activated, and the electric heating element 61 generates heat, which, together with the circulating fan blade 62, drives the air circulation inside the chamber, so that a uniform and stable high-temperature environment is formed inside the sealed environment chamber 5. The humidity inside the chamber is regulated by the humidification or dehumidification equipment connected to the humidity regulation unit 7 to simulate a high-humidity service environment. The salt spraying unit 8 is activated, and the salt solution is evenly sprayed into the detection chamber area through the spray pipe 81 and the atomizing nozzle 82 to simulate a salt and alkali corrosion environment. At the same time, a constant temperature heat-conducting medium can be introduced into the serpentine channel 9 inside the chamber wall to uniformly control the temperature of the chamber wall and ensure that the temperature of the inner wall of the detection chamber is uniform and consistent. During the testing process, the thin-film pressure sensor 3, which is embedded in the axial cross-section of the inner wall of the cavity and covers the top and bottom areas of the sealing surface, continuously collects the contact pressure data at each point on the sealing surface of the rubber ring. The sensor leads are collected through the lead hole 17 in the cavity wall and transmitted to the external data acquisition system through the sealing connector 11. The stress distribution state of the sealing surface and the decay law of stress with the environmental action time are obtained in real time. The test personnel can directly observe the apparent deformation state of the rubber ring through the transparent observation window 10, and simultaneously capture phenomena such as rubber ring extrusion and crack initiation. Finally, the mechanical properties and sealing performance of the rubber ring under complex environments such as high temperature are fully tested.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for testing the mechanical properties of rubber rings under high-temperature environments, characterized in that, Includes a socket simulation cavity (1), the inner wall surface of which encloses to form a detection cavity; A socket simulation component (2) is provided on one side of the socket simulation cavity (1). A pressure holding mechanism (4) is provided on the side of the socket simulation component (2) away from the socket simulation cavity (1) for driving the socket simulation component (2) to be axially pushed into the detection cavity and maintaining the compressed state. The inner wall of the socket simulation cavity (1) is provided with a plurality of preset shallow grooves (12), and each preset shallow groove (12) is respectively embedded with a thin film pressure sensor (3). The sensing surface of each thin film pressure sensor (3) is flush with the inner wall of the socket simulation cavity (1). The plurality of thin film pressure sensors (3) are distributed in at least two different axial sections along the axial direction of the inner wall. The plurality of thin film pressure sensors (3) in each axial section are arranged circumferentially along the inner wall and at least cover the top contact surface and bottom contact surface of the rubber ring under test after compression, for measuring the contact pressure at each position of the sealing surface under the compressed state of the rubber ring under test. An environmental simulation system is provided outside the socket simulation cavity (1). The environmental simulation system includes a sealed environment box (5). The socket simulation cavity (1) and the socket simulation component (2) are both located inside the sealed environment box (5). A heating unit (6) is provided on the inner wall of the sealed environment box (5), and a humidity regulating unit (7) is provided on the side wall of the sealed environment box (5).

2. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The pressure holding mechanism (4) includes a fixed frame (41), on which a guide assembly (42) extending axially is provided. A connecting slide (43) is slidably mounted on the guide assembly (42). The connecting slide (43) is fixedly connected to the end of the socket simulation component (2). A servo electric cylinder (44) is fixed to the end of the fixed frame (41). The output end of the servo electric cylinder (44) is connected to the connecting slide (43) for transmission, so as to drive the socket simulation component (2) together with the rubber ring to be tested mounted thereon to be pushed axially into the detection cavity of the socket simulation cavity (1), so that the rubber ring to be tested is radially compressed between the outer peripheral surface of the socket simulation component (2) and the inner wall surface of the socket simulation cavity (1), and maintains the compressed state after reaching the predetermined position.

3. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The heating unit (6) includes an electric heating element (61) and a circulating fan (62). The electric heating element (61) is fixed to the inner wall of the sealed environment box (5). The circulating fan (62) is arranged in conjunction with the electric heating element (61) to drive the formation of a hot circulating airflow inside the box.

4. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The humidity control unit (7) includes a humidification interface (71) and a dehumidification interface (72). The humidification interface (71) and the dehumidification interface (72) are both located on the side wall of the sealed environment box (5) and are used to connect external humidification equipment and dehumidification equipment, respectively.

5. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 4, characterized in that, The top of the sealed environment chamber (5) is provided with a salt spray unit (8). The salt spray unit (8) includes a spray main pipe (81) and several atomizing nozzles (82). The atomizing nozzles (82) are arranged facing the opening of the detection chamber and are used to apply a salt spray environment to the inside of the detection chamber.

6. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The socket simulation cavity (1) is composed of an upper half (13) and a lower half (14). A sealing gasket (15) is provided on the splicing surface of the upper half (13) and the lower half (14), and a detachable connection is achieved by fasteners (16).

7. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The socket simulation cavity (1) has a serpentine channel (9) inside its wall. The serpentine channel (9) allows for the flow of circulating heat-conducting medium. Both ends of the serpentine channel are provided with interfaces for connecting to an external circulating temperature control device, so that the socket simulation cavity (1) can be uniformly heated or cooled by the constant temperature medium flowing through the serpentine channel.

8. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The thin-film pressure sensor (3) is fixed in the preset shallow groove (12) by high-temperature resistant sealant (18). The lead wire on the back of the thin-film pressure sensor is led out to the outside through the lead wire hole (17) in the wall of the socket simulation cavity (1). The lead wire hole (17) is filled with the high-temperature resistant sealant (18).

9. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, The leads of all the thin-film pressure sensors (3) converge inside the wall of the socket simulation cavity (1) and are connected to an external data acquisition system through a sealing connector (11) located on the outer wall of the socket simulation cavity (1).

10. The device for testing the mechanical properties of rubber rings under high-temperature environments according to claim 1, characterized in that, A transparent observation window (10) is provided on the wall of the socket simulation cavity (1), and the position of the transparent observation window (10) corresponds to the sealing surface area of ​​the rubber ring to be tested after compression.

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