Low temperature tensile testing machine

Abstract

This utility model relates to the technical field of material mechanical property testing equipment, and provides a low-temperature tensile testing machine, including a chamber, a door, an upper clamp, and a lower clamp. The door is movably connected to the chamber, and the door and the chamber form a receiving cavity. The upper clamp includes an upper turntable and multiple upper clamping members. The upper turntable is connected to the chamber and is adapted to rotate relative to the chamber. The multiple upper clamping members are disposed on the upper turntable. The lower clamp includes a lower turntable and multiple lower clamping members. The lower turntable is connected to the chamber and is adapted to rotate relative to the chamber. The lower turntable is coaxially arranged with the upper turntable. The multiple lower clamping members are disposed on the lower turntable, and each of the multiple lower clamping members corresponds to one of the multiple upper clamping members. This low-temperature tensile testing machine, by setting a coaxial double-turntable clamp structure that can rotate synchronously, enables continuous testing of multiple samples, reduces the frequency of opening the chamber door, and has the advantages of improving testing efficiency, reducing internal temperature fluctuations, reducing operational risks, and improving the accuracy of test data.

Description

Technical Field

[0001] This utility model relates to the technical field of material mechanical property testing equipment, and in particular to a low-temperature tensile testing machine. Background Technology

[0002] As a core device for evaluating the mechanical properties of materials, the low-temperature tensile testing machine can perform various types of low-temperature mechanical tests on coil materials, coatings, and a variety of engineering materials, including tensile and peel strength tests. In existing technologies, after each material test, the low-temperature chamber door needs to be opened to replace the material and the test repeated. This frequent opening of the chamber door is not only cumbersome but also easily leads to frostbite for operators. Furthermore, the large temperature fluctuations inside the chamber can affect the accuracy of the test data. In addition, existing equipment is prone to unstable clamping during material handling, especially at low temperatures where material properties change, further increasing the difficulty of clamping. The lack of real-time monitoring methods for material deformation during testing makes it difficult to accurately assess changes in the mechanical properties of materials under low-temperature conditions. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a low-temperature tensile testing machine, which has the advantages of improving testing efficiency, reducing internal temperature fluctuations, lowering operational risks, and improving the accuracy of test data.

[0004] The low-temperature tensile testing machine according to an embodiment of the present utility model includes:

[0005] Box;

[0006] A door is movably connected to the box body, and the door and the box body enclose a receiving cavity;

[0007] The upper clamp includes an upper turntable and a plurality of upper clamping members. The upper turntable is connected to the housing and is adapted to rotate relative to the housing. The plurality of upper clamping members are disposed on the upper turntable.

[0008] The lower clamp includes a lower turntable and a plurality of lower clamping members. The lower turntable is connected to the housing and is adapted to rotate relative to the housing. The lower turntable is coaxially arranged with the upper turntable. The plurality of lower clamping members are disposed on the lower turntable and correspond one-to-one with the plurality of upper clamping members.

[0009] The low-temperature tensile testing machine according to the present invention, by setting a coaxial double turntable clamp structure that can rotate synchronously, enables continuous testing of multiple samples, reduces the frequency of opening the chamber door, and has the advantages of improving testing efficiency, reducing internal temperature fluctuations, reducing operational risks, and improving the accuracy of test data.

[0010] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a temperature sensor, which is disposed on the upper clamping member or the lower clamping member.

[0011] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a plurality of temperature sensors, each of which is disposed on a lower clamping member.

[0012] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a vision sensor, which is disposed in the receiving cavity and takes pictures between the upper clamping member and the lower clamping member.

[0013] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a humidity sensor, which is disposed inside the receiving cavity.

[0014] According to one embodiment of the present invention, the low-temperature tensile testing machine includes an air drying and filtering device, which is disposed within the receiving cavity.

[0015] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a partition plate disposed in the receiving cavity and dividing the receiving cavity into a testing cavity and a mounting cavity. The partition plate has an air outlet that connects the testing cavity and the mounting cavity. An air drying and filtering device is disposed in the mounting cavity. The upper clamp and the lower clamp are disposed in the testing cavity.

[0016] According to one embodiment of the present invention, the partition is provided with a plurality of air outlets, which are respectively located at the upper and lower ends of the partition.

[0017] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a tensile sensor, which is disposed on the upper clamp.

[0018] According to one embodiment of the present invention, the low-temperature tensile testing machine includes a controller, which is integrated on the outside of the housing.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the low-temperature tensile testing machine provided in this embodiment of the utility model.

[0022] Figure 2 This is a front view of the low-temperature tensile testing machine provided in this embodiment of the utility model.

[0023] Figure label:

[0024] 1. Chamber; 11. Receiving cavity; 111. Test cavity; 2. Chamber door; 3. Upper clamp; 31. Upper turntable; 32. Upper clamping component; 4. Lower clamp; 41. Lower turntable; 42. Lower clamping component; 5. Vision sensor; 6. Humidity sensor; 7. Partition; 71. Air outlet; 8. Tension sensor; 9. Controller. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0028] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] In existing technologies, low-temperature tensile testing machines, as core devices for evaluating the mechanical properties of materials, can perform various types of low-temperature mechanical tests on coil materials, coatings, tensile and peel strength, and many engineering materials. However, after testing each material, the low-temperature chamber door needs to be opened to change the material and repeat the test. Frequent opening of the chamber door leads to cumbersome operation and increases the risk of frostbite and unstable clamping. Furthermore, existing devices require repeated interruptions of the low-temperature environment during continuous testing, causing temperature fluctuations that affect test accuracy and resulting in low operational efficiency.

[0031] Therefore, please refer to the following: Figure 1 and Figure 2 This application proposes a low-temperature tensile testing machine, including a chamber, a door, an upper clamp, and a lower clamp. The door is movably connected to the chamber, and the door and the chamber enclose a receiving cavity. The upper clamp includes an upper turntable and multiple upper clamping members. The upper turntable is connected to the chamber and is adapted to rotate relative to the chamber. The multiple upper clamping members are disposed on the upper turntable. The lower clamp includes a lower turntable and multiple lower clamping members. The lower turntable is connected to the chamber and is adapted to rotate relative to the chamber. The lower turntable is coaxially arranged with the upper turntable. The multiple lower clamping members are disposed on the lower turntable, and the multiple lower clamping members correspond one-to-one with the multiple upper clamping members.

[0032] The upper turntable refers to a rotating disc structure that can rotate around an axis. Specifically, it can be implemented using a servo motor-driven indexing plate, used to support multiple upper clamping components and enable station switching. The lower turntable is a rotating mechanism coaxially arranged with the upper turntable. Specifically, it can use a gear transmission system to achieve synchronous rotation, ensuring that the upper and lower clamping components remain aligned at all times. The upper clamping component is a clamping assembly used to fix the upper end of the sample. Specifically, it can use pneumatic grippers or hydraulic clamping devices for quick clamping. The lower clamping component is a clamping unit corresponding to the upper clamping component. Specifically, it can use an electromagnetic locking mechanism to achieve selective clamping at a single station. Coaxial arrangement means that the upper and lower turntables share the same axis of rotation, ensuring uniform force distribution during sample tensile testing.

[0033] Specifically, within a closed containment chamber, multiple upper and lower clamping components are mounted on rotatable upper and lower turntables, respectively. During testing, the upper clamping component at a selected station fixes the upper end of the sample, while the lower clamping component selectively clamps the sample. Tensile testing is performed through the relative displacement of the upper and lower clamps. After completing the current test, the upper and lower turntables rotate synchronously to the next station, where the lower clamping component automatically clamps a new sample, and the clamping at the station that has completed the test is released. Because the upper and lower turntables rotate coaxially, the clamping components at each station always maintain precise alignment, enabling continuous testing without manual intervention. Throughout the entire process, the chamber door remains closed to avoid damage from low-temperature environments and risks associated with human error.

[0034] Compared to existing technologies, traditional devices require opening the chamber door to replace the sample for each test, leading to increased cumulative errors due to temperature fluctuations, and manual operation poses safety hazards. This solution utilizes a rotary multi-station fixture structure to achieve continuous testing in a closed environment. The synchronous rotation of the upper and lower turntables ensures sample positioning accuracy, effectively eliminating temperature disturbances caused by frequent door openings, while reducing the number of manual interventions to a single operation during the loading stage.

[0035] Through the above technical solutions, this application achieves continuous stability of the low-temperature testing environment, avoiding temperature fluctuations caused by frequent opening of the chamber door. The multi-station clamping structure allows multiple samples to be pre-loaded and tested sequentially, significantly improving testing efficiency. The synchronous rotation mechanism of the upper and lower clamps ensures sample alignment accuracy and eliminates clamping deviations caused by manual operation. The closed operating procedure fundamentally eliminates the risk of frostbite to personnel exposed to the low-temperature environment, while also reducing stress deformation of mechanical parts caused by temperature changes.

[0036] This application further proposes a low-temperature tensile testing machine that includes a temperature sensor, which is disposed on the upper clamping member or the lower clamping member.

[0037] A temperature sensor is a measuring device used to detect the surface temperature of the material being measured. It can be implemented using a thermocouple or a resistance temperature detector (RTD) sensor, with its sensing end directly contacting the surface of the material. The temperature sensor is integrated inside or on the surface of the clamping component, eliminating the difference between the air temperature inside the chamber and the actual temperature of the material being measured.

[0038] Specifically, the temperature sensor is directly mounted on the clamping surface of the clamping component. When the material is clamped, the sensor's temperature-sensing surface makes close contact with the material surface. During low-temperature testing, the sensor continuously collects real-time temperature data of the material clamping area and transmits the signal to the control system. When the chamber door is opened, causing temperature fluctuations inside the chamber, the sensor on the clamping component can immediately detect the temperature change at the material contact surface. Based on this data, the control system automatically adjusts the refrigeration system output, eliminating the need for manual opening of the chamber to verify temperature stability.

[0039] Through the above technical solution, this application achieves precise closed-loop control of the temperature of the material clamping part, and can maintain the temperature stability of the test area even when the chamber door is frequently opened, avoiding repeated testing due to temperature monitoring errors, reducing the number of times operators are exposed to low-temperature environments, and ensuring the consistency of temperature conditions for different batches of tests.

[0040] This application further proposes a low-temperature tensile testing machine including multiple temperature sensors, each temperature sensor being located in a lower clamping member.

[0041] Among them, the temperature sensor refers to the device used to detect the temperature change of the clamping area in real time, and the lower clamping component refers to the clamping assembly used to fix the material being measured. Its surface can be provided with embedded mounting grooves or threaded holes for fixing the temperature sensor.

[0042] Specifically, temperature sensors are directly mounted near the clamping surface of each lower clamping component. When the material to be tested is clamped, the temperature sensor and the material contact area form a spatial correspondence. During the test, multiple lower clamping components rotate synchronously with the lower turntable, and each temperature sensor independently collects temperature data at its corresponding clamping position. The collected temperature signals are transmitted to the control system, which uses algorithms to generate a temperature distribution heatmap, thereby identifying temperature uniformity deviations within the test area.

[0043] Through the above technical solution, this application realizes the synchronous monitoring of the temperature of each clamping point of the tested material, effectively identifies local temperature abnormality areas, ensures the consistency of temperature conditions of the material under stress in low temperature environment, and avoids test data distortion caused by uneven temperature distribution.

[0044] At low temperatures, the brittleness of the rolled material increases, and stress concentration in the clamping area makes it highly susceptible to fracture. However, it is difficult for researchers to detect such fractures when observing from outside the low-temperature chamber. To address this, this application further proposes a low-temperature tensile testing machine that includes a vision sensor located within the housing cavity, which captures images between the upper and lower clamping components.

[0045] Among them, the vision sensor refers to a non-contact monitoring device used to collect image data of the clamping area. It is configured to determine the material clamping status through image recognition algorithms. The installation position of the vision sensor within the receiving cavity is limited to the clamping area corresponding to the upper and lower clamping components, so that displacement changes of the clamping contact surface can be captured in real time.

[0046] Specifically, the vision sensor is fixed to the inner wall of the receiving cavity, with its lens axis forming a preset angle with the clamping plane of the upper and lower clamping components, such as a tilt angle of 30° to 60°, to cover the vertical projection range of the clamping area. When the material is clamped, the vision sensor continuously acquires image data of the clamping area, and the image processing unit analyzes the relative position of the material edge and the clamp to determine whether there is clamping misalignment or loosening. This monitoring process can be completed without opening the cabinet door; the operator can observe the clamping status in real time through an external display screen and intervene only when an abnormality is detected.

[0047] Understandably, at low temperatures, moisture inside the chamber condenses into ice, which can easily interfere with the testing environment. This application further proposes a low-temperature tensile testing machine that includes a humidity sensor, which is located inside the chamber.

[0048] A humidity sensor is a device used to detect environmental humidity parameters. Specifically, it can be implemented using a capacitive humidity sensor or a resistive humidity sensor, and outputs humidity data in real time through electrical signal conversion.

[0049] Specifically, the humidity sensor is directly installed inside the containment chamber, enabling real-time monitoring of humidity changes in the test environment. The controller adjusts the operation of the air drying and filtering device according to a preset threshold, thereby quickly restoring and maintaining humidity stability within the chamber. Because the sensor and the test area are in the same sealed space, measurement delays or deviations caused by external sensor placement are avoided, ensuring that the tested material is always under humidity conditions that meet the test requirements.

[0050] Through the above technical solution, this application can obtain humidity data in the containment cavity in real time, provide a basis for environmental control, reduce the interference of humidity fluctuations caused by frequent opening of the chamber door on the testing process, ensure that the material completes mechanical property testing under constant humidity conditions, thereby improving the accuracy and repeatability of the test results.

[0051] This application further proposes a low-temperature tensile testing machine including an air drying and filtering device, which is located inside the receiving cavity.

[0052] The air drying and filtration device refers to a device used to actively remove moisture from the containment cavity. Specifically, it can be implemented using an adsorption dryer or a condensation dryer. It separates and discharges moisture from the humid air through physical adsorption or low-temperature condensation, thereby reducing the humidity inside the cavity. The containment cavity is a closed space formed by the enclosure and door, which is airtightly sealed using sealing strips and locking mechanisms. The interior is used to house upper and lower clamps for material testing. The airtightness of the containment cavity allows the air drying and filtration device to centrally process the humid air inside.

[0053] Specifically, when the chamber door is frequently opened due to material changes, moisture from the external environment enters the chamber. The air drying and filtering device, triggered by its built-in humidity sensor module, dries and filters the incoming humid air in real time. During low-temperature testing, the device operates continuously to maintain a constant humidity level within the chamber, preventing moisture from condensing into frost on the low-temperature metal surfaces. The dried air is then evenly distributed throughout the testing area via a circulating air duct, ensuring that the contact surface between the fixture and the specimen is not affected by frost.

[0054] This application further proposes a low-temperature tensile testing machine including a partition, which is disposed in a receiving cavity and divides the receiving cavity into a test cavity and a mounting cavity. The partition has an air outlet that connects the test cavity and the mounting cavity. An air drying and filtering device is disposed in the mounting cavity. An upper clamp and a lower clamp are disposed in the test cavity.

[0055] The partition refers to a plate-like structure that provides physical separation, typically made of metal plates or composite insulation panels, used to isolate the testing area from the equipment installation area. The air outlet is a ventilation channel that runs through the partition, typically using an array of circular holes or slotted openings to create a directional airflow path. The testing chamber is the space that houses the fixtures and samples, used to maintain stable testing conditions. The installation chamber is an independent space that houses the air drying and filtration device, typically formed by partitions and the inner wall of the enclosure, used to prevent interference with equipment operation.

[0056] Specifically, a partition is vertically installed inside the chamber, dividing the originally connected receiving cavity into a testing cavity and a mounting cavity. An air drying and filtering device is fixed to the bottom of the mounting cavity, and its output dry airflow enters the testing cavity in a laminar flow manner through slotted air outlets at the top and bottom of the partition. Mechanical vibrations generated by the upper and lower clamps in the testing cavity during rotation are blocked by the rigid structure of the partition, preventing them from being transmitted to the drying and filtering device in the mounting cavity. When the chamber door is opened to change samples, the drying and filtering device in the mounting cavity continues to operate, delivering dry airflow to the testing cavity through the air outlets, quickly replacing the humid air that enters due to the door opening. Condensate generated during the test accumulates at the bottom of the testing cavity due to gravity, and the sealed connection between the partition and the bottom of the chamber prevents liquid from seeping back into the mounting cavity.

[0057] Through the above technical solutions, this application achieves reduced fluctuations in ambient humidity, improved drying airflow efficiency, and enhanced equipment operational stability. The separate layout of the testing chamber and mounting chamber prevents condensation from corroding the drying device, extending its service life. The directional airflow design improves the uniformity of humidity on the sample surface, reducing clamping failures caused by localized frost formation.

[0058] This application further proposes that the partition has multiple air outlets, which are respectively located at the upper and lower ends of the partition.

[0059] Specifically, the air outlets at the top and bottom of the partition form vertically distributed airflow paths. Dry air, processed by the air drying and filtering device within the chamber, enters the top area of ​​the testing chamber through the top outlet and simultaneously enters the bottom area through the bottom outlet. The top outlet promotes the upward expulsion of hot air, while the bottom outlet guides the downward circulation of cool air; together, they create a convection effect, resulting in a more uniform temperature distribution within the testing chamber. When the chamber door is opened, external moisture enters the testing chamber, and the bidirectional airflow from the top and bottom outlets accelerates moisture removal, reducing the time required for humidity adjustment.

[0060] This application further proposes a low-temperature tensile testing machine including a tensile sensor, which is mounted on an upper clamp.

[0061] The tensile sensor is a measuring device used to detect the tensile force on a sample. It is installed at the end of the upper clamp and directly acquires real-time mechanical data during the tensile process. The upper clamp is a clamping assembly containing a rotatable structure, specifically a turntable structure coaxial with the lower clamp. The turntable has multiple clamping positions distributed circumferentially. Rotation switches the clamping position, allowing the tensile sensor to synchronously follow the clamp's rotation angle, enabling continuous acquisition of tensile force data from multiple angles.

[0062] Specifically, the tensile sensor is integrated into the end of the upper clamp. When the sample is clamped by the upper and lower clamps, the tensile sensor directly detects the change in axial tensile force generated during the tensile process. When the sample reaches the critical fracture point, the sensor data can trigger a test termination signal, thus eliminating the need to frequently open the chamber door to replace the sample and avoiding invalid tests caused by human judgment errors.

[0063] In some specific embodiments, the tension sensor is fixed inside the clamping part of the upper fixture by a threaded connection or a snap-fit ​​structure, and its signal line is led out to an external controller through the cavity of the turntable's central shaft to ensure the stability of signal transmission during rotation.

[0064] This application further proposes a low-temperature tensile testing machine including a controller, which is integrated on the outside of the chamber.

[0065] The controller refers to an electronic module used to receive operating commands and control the equipment's operating status. It can be implemented using a programmable logic controller (PLC) or an embedded microprocessor. It connects to the actuator inside the enclosure via signal lines and is used to adjust tensile parameters, temperature parameters, and testing procedures. "Integrated on the outside of the enclosure" means the controller is fixedly mounted on the outer surface of the enclosure or inside a separate shell connected to the enclosure. This can be achieved using mounting brackets or snap-fit ​​structures, physically isolating the operating interface from the interior of the enclosure.

[0066] Specifically, the controller is externally mounted, forming an independent spatial layout with the chamber. During testing, operators can directly adjust the fixture speed, temperature setpoint, and tensile force threshold via an external control panel. Since control commands can be transmitted without entering the chamber, the replacement of test materials and parameter adjustments are decoupled into two independent operational stages, achieving equipment control while maintaining the test chamber's sealed state. This avoids cold air loss caused by repeatedly opening the chamber door and eliminates the possibility of operators coming into contact with the low-temperature environment.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A low-temperature tensile testing machine, characterized in that, include: Box; A door is movably connected to the box body, and the door and the box body enclose a receiving cavity; The upper clamp includes an upper turntable and a plurality of upper clamping members. The upper turntable is connected to the housing and is adapted to rotate relative to the housing. The plurality of upper clamping members are disposed on the upper turntable. The lower clamp includes a lower turntable and a plurality of lower clamping members. The lower turntable is connected to the housing and is adapted to rotate relative to the housing. The lower turntable is coaxially arranged with the upper turntable. The plurality of lower clamping members are disposed on the lower turntable and correspond one-to-one with the plurality of upper clamping members.

2. The low-temperature tensile testing machine according to claim 1, characterized in that, The low-temperature tensile testing machine includes a temperature sensor, which is located on the upper clamping member or the lower clamping member.

3. The low-temperature tensile testing machine according to claim 2, characterized in that, The low-temperature tensile testing machine includes multiple temperature sensors, each of which is located in a lower clamping member.

4. The low-temperature tensile testing machine according to claim 1, characterized in that, The low-temperature tensile testing machine includes a vision sensor, which is located inside the receiving cavity and takes pictures between the upper clamping member and the lower clamping member.

5. The low-temperature tensile testing machine according to claim 1, characterized in that, The low-temperature tensile testing machine includes a humidity sensor, which is located inside the housing cavity.

6. The low-temperature tensile testing machine according to claim 1, characterized in that, The low-temperature tensile testing machine includes an air drying and filtration device, which is located inside the receiving cavity.

7. The low-temperature tensile testing machine according to claim 6, characterized in that, The low-temperature tensile testing machine includes a partition plate disposed within the receiving cavity, which divides the receiving cavity into a testing cavity and an installation cavity. The partition plate has an air outlet that connects the testing cavity and the installation cavity. An air drying and filtering device is disposed in the installation cavity. The upper clamp and the lower clamp are disposed in the testing cavity.

8. The low-temperature tensile testing machine according to claim 7, characterized in that, The partition has multiple air outlets, which are respectively located at the upper and lower ends of the partition.

9. The low-temperature tensile testing machine according to any one of claims 1 to 8, characterized in that, The low-temperature tensile testing machine includes a tensile sensor, which is mounted on the upper clamp.

10. The low-temperature tensile testing machine according to any one of claims 1 to 8, characterized in that, The low-temperature tensile testing machine includes a controller, which is integrated on the outside of the housing.

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