Chemical fiber high-strength filament heat-resistant creep performance tester

Abstract

The present application relates to the technical field of silk performance detection, and specifically relates to a heat creep performance tester for chemical fiber high-strength filaments, which comprises a rack, a heat insulation plate arranged in the rack, a heating component arranged on the upper part of the heat insulation plate, a clamping structure arranged on the upper part of the heat insulation plate and connected with a force value sensor arranged on the top of the rack, a limiting barrel arranged on the lower part of the heat insulation plate, a counterweight structure arranged in the limiting barrel, a lifting assembly elastically connected with the counterweight structure, the lifting assembly being connected with one end of the chemical fiber high-strength filament away from the clamping structure, the lifting assembly and the counterweight structure moving away from each other when the chemical fiber high-strength filament breaks, and a supporting assembly connected with the counterweight structure and the lifting assembly, the supporting assembly being capable of locking the counterweight structure in the limiting barrel when the lifting assembly and the counterweight structure move away from each other, so as to prevent large impact from affecting the detection accuracy of the remaining filament.

Description

Technical Field

[0001] This invention relates to the field of yarn performance testing technology, specifically a heat resistance creep performance tester for high-strength chemical fiber filaments. Background Technology

[0002] High-strength chemical fiber filaments, as a high-performance fiber material, are widely used in aerospace, marine cables, special protection and high-performance composite materials. Their heat creep resistance is a key indicator that determines their service life and service safety.

[0003] Currently, the heat creep resistance test of high-strength chemical fiber filaments is usually carried out using a creep tester. This tester typically applies a constant traction force to the filaments using counterweights and monitors the creep elongation of the filaments in real time using displacement sensors or optical measurement devices under high temperature conditions. To improve testing efficiency, some testers adopt a multi-station parallel testing scheme, which can simultaneously test the creep performance of multiple filaments.

[0004] However, during multi-station parallel testing, when a filament sample at a certain station breaks due to the combined effects of high temperature and tension, the counterweight at that station will instantly lose its tension constraint and fall freely, eventually impacting the bottom of the equipment at a certain speed. The impact load generated by this impact will not only cause mechanical damage to the equipment, but will also be transmitted to the sensors and displacement measuring devices through the equipment frame, causing instantaneous fluctuations in the measurement data. This will contaminate the creep test data of that station and other stations in the same batch, affecting the validity and repeatability of the overall data during multi-station parallel testing.

[0005] To address the issue of impact from falling counterweights, some existing technologies have attempted to incorporate buffer components, such as buffer pads, buffer springs, or dampers, at the bottom of the equipment to absorb some of the impact energy and reduce the direct impact on the equipment and sensors. However, such buffer components introduce new problems. After contacting the buffer component, the counterweight does not immediately come to a stop due to the restoring force of the elastic element. Instead, it generates periodic damped oscillations on the buffer component. These oscillations are also transmitted through the frame to the sensors and displacement measuring devices, causing continuous interference to the stability and accuracy of the detection data. Summary of the Invention

[0006] The purpose of this invention is to provide a heat-resistant creep performance tester for high-strength chemical fiber filaments to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A heat resistance creep tester for high-strength chemical fiber filaments includes: A frame, wherein a heat insulation plate is provided inside the frame, and a heating component is provided on the upper part of the frame above the heat insulation plate; A clamping structure is disposed on the upper part of the heat insulation plate, and the clamping structure is connected to a force sensor installed on the top of the frame; A limiting barrel is provided at the lower part of the heat insulation plate, and a counterweight structure is provided inside the limiting barrel; The lifting component is elastically connected to the counterweight structure. The lifting component is connected to the end of the high-strength chemical fiber filament away from the clamping structure. When the high-strength chemical fiber filament breaks, the lifting component and the counterweight structure move away from each other. A support component connects the counterweight structure and the lifting component. The support component can lock the counterweight structure within the limiting barrel when the lifting component and the counterweight structure move away from each other.

[0008] The heat creep resistance tester for high-strength chemical fiber filaments as described above: the clamping structure includes a connecting frame connected to the force sensor, a micro-motion device is fixedly installed on the connecting frame, and a clamping plate is connected to the actuating end of the micro-motion device. When the clamping plate moves toward the micro-motion device, it can clamp the upper end of the high-strength chemical fiber filament.

[0009] The heat-resistant creep performance tester for high-strength chemical fiber filaments as described above: the counterweight structure includes a base connected to the lifting assembly and multiple sets of counterweights that can be stacked on the base.

[0010] The heat-resistant creep performance tester for high-strength chemical fiber filaments as described above: the lifting assembly includes a pulling rod that passes through the base and the counterweight, and the lower end of the pulling rod is provided with a support part, which is adapted to abut against the base, and the support part is adapted to abut against the electric lifting push rod provided on the frame. A cylindrical spring is fitted onto the traction rod, with one end of the cylindrical spring connected to the base and the other end connected to the support.

[0011] The heat resistance creep performance tester for high-strength chemical fiber filaments as described above: the lifting assembly further includes a constraint tube disposed on the heat insulation plate and a connecting chain connecting the lower end of the high-strength chemical fiber filament, the connecting chain being able to pass through the constraint tube; The tension rod is equipped with a displacement detection rod, and the frame is equipped with a CCD industrial camera.

[0012] The heat-resistant creep performance tester for high-strength chemical fiber filaments described above: the limiting barrel is provided with multiple sets of annular inner grooves at equal intervals along its axial direction.

[0013] The heat-resistant creep performance tester for high-strength chemical fiber filaments as described above: the support assembly includes multiple sets of deflection hinge rods that are circumferentially and equidistantly mounted on the base, and the end of the deflection hinge rod away from the base is equipped with an abutment part that matches the annular inner groove; The support assembly also includes a trigger structure connecting the deflection hinge rod and the support portion. The trigger structure can cause the abutment portion to move toward the annular inner groove when the support portion moves away from the base.

[0014] The heat-resistant creep performance tester for high-strength chemical fiber filaments as described above: the triggering structure includes a fitting shaft rotatably mounted on the deflection hinge rod and a side plate disposed on the side of the support portion. The side plate is provided with an inclined groove, and the fitting shaft can roll within the inclined groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: When a high-strength synthetic fiber filament breaks due to high-temperature creep, the pull rod, support, base, and counterweight will simultaneously lose support and begin to fall freely. However, the cylindrical spring immediately releases its pre-stored elastic potential energy at the moment of breakage, allowing the support components to lock before the counterweight and base have undergone significant downward displacement. This avoids a rigid collision between the counterweight and base and the bottom of the limiting barrel after free fall, eliminating the interference of the violent vibration caused by the instantaneous impact on the measurement accuracy of the force sensor and CCD industrial camera. It also prevents mechanical damage to the counterweight, limiting barrel, and frame caused by repeated impact loads. Thus, while ensuring the long-term reliability of the equipment, it also ensures that the breakage of a single-station sample will not contaminate the creep test data of other stations in the same batch, improving the effectiveness of the overall data and the operational safety of the equipment during multi-station parallel testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-strength chemical fiber filament heat creep resistance tester.

[0017] Figure 2 This is a schematic diagram of the structure of a high-strength chemical fiber filament heat creep resistance tester after the frame is removed.

[0018] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0019] Figure 4 for Figure 2 Enlarged view of the structure at point B.

[0020] Figure 5 This is a schematic diagram of the counterweight structure and lifting assembly in a high-strength chemical fiber filament heat resistance creep performance tester.

[0021] Figure 6 This is a cross-sectional view of the counterweight structure and lifting assembly in a high-strength chemical fiber filament heat resistance creep performance tester.

[0022] Figure 7 for Figure 6 Enlarged view of the structure at point C.

[0023] Figure 8 This is a schematic diagram of the deflection hinge rod in a high-strength chemical fiber filament heat creep resistance tester.

[0024] In the diagram: 1. Frame; 2. Heat insulation plate; 3. Force sensor; 4. Connecting frame; 5. Micro-motion device; 6. Clamping plate; 7. Heating component; 8. CCD industrial camera; 9. Limiting barrel; 901. Annular inner groove; 10. Counterweight; 11. Pull rod; 1101. Displacement detection rod; 12. Base; 13. Support part; 1301. Inclined groove; 14. Cylindrical spring; 15. Deflection hinge rod; 1501. Abutment part; 1502. Fitting shaft; 16. Electric lifting push rod; 17. Connecting chain; 18. Constraint tube. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Please see Figures 1-8 As an embodiment of the present invention, the heat resistance creep performance tester for high-strength chemical fiber filaments includes: a frame 1, a clamping structure, a limiting barrel 9, a lifting assembly, and a support assembly.

[0027] The frame 1 is equipped with a heat insulation plate 2, and a heating component 7 is located on the upper part of the frame 1 above the heat insulation plate 2. This divides the frame 1 into an upper high-temperature zone and a lower normal-temperature zone by the heat insulation plate 2. During the testing process, the wire is located in the upper high-temperature zone, which allows the wire to be heated effectively and controllably. The heat insulation plate 2 has a heat insulation effect, which can block heat convection and heat radiation, preventing heat from the upper high-temperature zone from entering the lower normal-temperature zone and causing temperature drift interference to the equipment in the lower normal-temperature zone, thereby ensuring the stability of the measurement reference.

[0028] Please see Figure 3The clamping structure is disposed on the upper part of the heat insulation plate 2. The clamping structure is connected to the force sensor 3 installed on the top of the frame 1. The clamping structure includes a connecting frame 4 connected to the force sensor 3. A micro-motion device 5 is fixedly installed on the connecting frame 4. A clamping plate 6 is connected to the actuating end of the micro-motion device 5. When the clamping plate 6 moves toward the micro-motion device 5, it can clamp the upper end of the high-strength chemical fiber filament.

[0029] When loading the filament to be tested, the clamping plate 6 is first driven away from the micro-motion device 5 by the micro-motion device 5. At this time, a predetermined gap will be formed between the micro-motion device 5 and the clamping plate 6, which makes it convenient to place the filament to be tested between the micro-motion device 5 and the clamping plate 6. After the filament to be tested is placed between the micro-motion device 5 and the clamping plate 6, the micro-motion device 5 will drive the clamping plate 6 to move in the opposite direction, thereby pressing and fixing the filament to be tested.

[0030] After one end of the long filament to be tested is clamped, the other end can be pulled by the counterweight structure and the lifting component, so that the filament is in a taut state. At this time, the force value detected by the force sensor 3 corresponds to the traction force generated by the counterweight structure and the lifting component.

[0031] Please see Figures 4-6 The limiting barrel 9 is located at the lower part of the heat insulation plate 2. The limiting barrel 9 is provided with a counterweight structure. The counterweight structure includes a base 12 connected to the lifting assembly and multiple sets of counterweights 10 that can be stacked on the base 12.

[0032] In this embodiment, the required tensile force values ​​for high-strength chemical fiber filaments of different specifications are different, meaning that the testing standards for the two are somewhat different. In this case, by increasing the number of counterweights 10, the tensile force generated by the counterweight structure on the high-strength chemical fiber filaments can be changed, thereby satisfying the testing of high-strength chemical fiber filaments of different specifications.

[0033] Please see Figure 2 , Figures 5-6 The lifting component is elastically connected to the counterweight structure. The lifting component is connected to the end of the high-strength chemical fiber filament away from the clamping structure. When the high-strength chemical fiber filament breaks, the lifting component and the counterweight structure move away from each other. The lifting assembly includes a pull rod 11 that passes through the base 12 and the counterweight 10. The lower end of the pull rod 11 is provided with a support part 13. The support part 13 is adapted to abut against the base 12 and is adapted to abut against the electric lifting push rod 16 provided on the frame 1. When loading high-strength chemical fiber filaments, the electric lifting push rod 16 can be controlled to drive the support part 13 to move upward. At this time, the column spring 14 provides elastic support force less than the weight of the counterweight 10, so that the support part 13 is in abutting against the base 12. After the two ends of the high-strength chemical fiber filaments are fixed, the electric lifting push rod 16 will slowly move away from the support part 13, so that the weight of the base 12 and the counterweight 10 is slowly loaded onto the high-strength chemical fiber filaments, preventing the filaments from breaking due to short-term overload during the loading process.

[0034] A cylindrical spring 14 is fitted onto the pull rod 11. One end of the cylindrical spring 14 is connected to the base 12, and the other end is connected to the support part 13.

[0035] In this embodiment, the lower end of the high-strength chemical fiber filament to be tested is connected to the pull rod 11. At this time, the weight of the base 12 and the counterweight 10 is greater than the elastic force provided by the column spring 14. Thus, when the high-strength chemical fiber filament is under tension and in a stable state, the support part 13 will be in contact with the base 12, and the column spring 14 will be compressed to a certain extent. During the process of the high-strength chemical fiber filament being heated and undergoing creep, when the high-strength chemical fiber filament breaks, the pull rod 11, the support part 13, the base 12, and the counterweight 10 will all undergo free fall. During this process, the column spring 14 will release elastic potential energy, thereby driving the support component to move, so that the base 12 and the counterweight 10 can be locked with the limiting barrel 9, preventing the base 12 and the counterweight 10 from undergoing free fall and causing subsequent impact.

[0036] Based on the above configuration, when the high-strength chemical fiber filament breaks due to high-temperature creep, although the pull rod 11, support 13, base 12, and counterweight 10 will simultaneously lose support and begin to fall freely, the cylindrical spring 14 immediately releases its pre-stored elastic potential energy at the moment of breakage. This allows the support components to complete the locking action before the counterweight 10 and base 12 have undergone significant downward displacement. This avoids the counterweight 10 and base 12 from rigidly colliding with the bottom of the limiting barrel 9 after free fall, eliminating the interference of the violent vibration caused by the instantaneous impact on the measurement accuracy of the force sensor 3 and CCD industrial camera 8. It also prevents mechanical damage to the counterweight 10, limiting barrel 9, and frame 1 caused by repeated impact loads. Thus, while ensuring the long-term reliability of the equipment, it also ensures that the breakage of a single-station sample will not contaminate the creep test data of other stations in the same batch, improving the effectiveness of the overall data and the operational safety of the equipment during multi-station parallel testing.

[0037] The lifting assembly also includes a constraint tube 18 disposed on the heat insulation plate 2 and a connecting chain 17 connecting the lower end of the high-strength chemical fiber filament, wherein the connecting chain 17 can pass through the constraint tube 18. The tension rod 11 is equipped with a displacement detection rod 1101, and the frame 1 is equipped with a CCD industrial camera 8.

[0038] In this embodiment, the constraint tube 18 passes through and is fixed to the heat insulation plate 2. When loading the high-strength chemical fiber filament to be tested, one end of the filament is fixed to the clamping structure, and the other end is connected to the connecting chain 17. At this time, the connecting chain 17 is inserted into the constraint tube 18 from top to bottom. Under the guidance of the weight of the connecting chain 17 itself, the connecting chain 17 hangs down naturally and drives the lower end of the high-strength chemical fiber filament to smoothly enter the internal channel of the constraint tube 18. Then, the lower end of the connecting chain 17 is connected to the upper end of the pulling rod 11, thus completing the pre-positioning of the filament in the vertical direction.

[0039] With the aforementioned constraint tube 18, during the testing process, the connecting chain 17 is always constrained within the channel of the constraint tube 18. When the high-strength chemical fiber filament suddenly breaks due to high-temperature creep, the connecting chain 17 only oscillates slightly within the limited radial space of the constraint tube 18. The amplitude of its oscillation is limited by the inner wall of the constraint tube 18, thereby preventing the end of the connecting chain 17 from swinging irregularly and significantly due to instantaneous unloading. This avoids the swinging connecting chain 17 from colliding with the filaments under test at adjacent stations or interfering with their loading state, ensuring the independence and testing safety of each station during multi-station parallel testing.

[0040] During the testing process, the CCD industrial camera 8 acquires real-time images of the displacement detection rod 1101 located below the heat insulation plate 2. The displacement detection rod 1101 is an extension marking part at the upper end of the pull rod 11. Its initial height position is recorded by the CCD industrial camera 8 and used as a measurement reference. As the testing continues, the high-strength chemical fiber filament gradually undergoes creep elongation under the combined action of constant heat load and constant traction force. The pull rod 11 and the displacement detection rod 1101 move down synchronously. The CCD industrial camera 8 records the height change of the displacement detection rod 1101 in real time and synchronously at a set sampling frequency. Based on the difference between the real-time height and the initial height of the displacement detection rod 1101, the creep elongation of the high-strength chemical fiber filament at the corresponding workstation is calculated sequentially. This allows the creep rate and total creep of the filament at each workstation under high temperature conditions to be obtained, achieving accurate, continuous, and non-contact measurement of the heat creep resistance of the high-strength chemical fiber filament.

[0041] Please see Figures 6-7 It should be noted that the limiting barrel 9 is provided with multiple sets of annular inner grooves 901 at equal intervals along its axial direction; The support component connects the counterweight structure and the lifting component. The support component can lock the counterweight structure in the limiting barrel 9 when the lifting component and the counterweight structure move away from each other. The support assembly includes multiple sets of deflection hinge rods 15 that are circumferentially and rotatably mounted on the base 12. The end of each deflection hinge rod 15 away from the base 12 is equipped with an abutment portion 1501 that is adapted to the annular inner groove 901. The support assembly also includes a triggering structure connecting the deflection hinge rod 15 and the support portion 13. The triggering structure can cause the abutment portion 1501 to move toward the annular inner groove 901 when the support portion 13 moves away from the base 12. In the initial state, there is a certain gap between the outermost side of the abutment portion 1501 and the inner wall of the limiting barrel 9. This gap is larger than the gap between the base 12 and the inner wall of the limiting barrel 9. This can prevent the abutment portion 1501 from getting stuck in the annular inner groove 901 when the base 12 and the counterweight 10 move. When the high-strength chemical fiber filament breaks and the deflection hinge rod 15 rotates, the above gap can ensure that the abutment portion 1501 can be inserted into the annular inner groove 901 in time, while reducing the vibration force when the abutment portion 1501 hits the inner wall of the limiting barrel 9.

[0042] The triggering structure includes a fitting shaft 1502 rotatably mounted on the deflection hinge rod 15 and a side plate disposed on the side of the support portion 13. The side plate is provided with an inclined groove 1301, and the fitting shaft 1502 can roll within the inclined groove 1301.

[0043] In this embodiment, in the initial state, the support part 13 and the base 12 are in abutting engagement. At this time, the column spring 14 is in a compressed energy storage state, and the abutting part 1501 of the deflection hinge rod 15 is located in a position that does not interfere with the annular inner groove 901 on the inner wall of the limiting barrel 9. That is, the abutting part 1501 will not get stuck in the annular inner groove 901 when the base 12 descends. This ensures that during the creep process caused by the normal heating and stretching of the high-strength chemical fiber filament, the base 12 and the counterweight 10 can move smoothly downwards with the creep elongation of the filament, ensuring the continuity of the detection process and the authenticity of the data.

[0044] When the high-strength synthetic fiber filament breaks, the entire structure consisting of the base 12, the support 13, and the cylindrical spring 14 instantly loses its upward tension and begins to fall under the influence of gravity. During this process, the cylindrical spring 14 rapidly releases its pre-stored elastic potential energy. This elastic potential energy drives the support 13 to move away from the base 12, thereby causing the fitting shaft 1502 to slide along the length of the inclined groove 1301 on the support 13. Due to the guidance of the inclined groove 1301... The sliding of the fitting shaft 1502 will cause the deflection hinge rod 15 to deflect, causing the abutment part 1501 to gradually move closer to the inner wall of the limiting barrel 9. As the deflection angle increases, the abutment part 1501 eventually extends into the annular inner groove 901 at the corresponding position on the inner wall of the limiting barrel 9. Once the abutment part 1501 enters the annular inner groove 901, the height of the base 12 and the counterweight 10 is locked, thereby effectively preventing the free fall of the two and avoiding a violent impact at the end of the fall.

[0045] Regarding the specific timing of the abutment portion 1501 entering the annular inner groove 901, there are two possible scenarios.

[0046] Firstly, when the deflection hinge rod 15 deflects, the abutment part 1501 is precisely aligned with and enters the annular inner groove 901 corresponding to its current height. In this case, the height of the base 12 and the counterweight 10 when locked is basically the same as the height before the breakage, that is, the two hardly fell effectively before locking, so no significant impact or vibration is generated.

[0047] Secondly, when the deflection hinge rod 15 deflects, the abutment part 1501 is not at the height of the annular inner groove 901. At this time, the abutment part 1501 will remain in contact with the inner wall of the limiting barrel 9 and continue to slide downwards with the base 12. At this time, the cylindrical spring 14 still has the tendency to release elastic potential energy, so that the abutment part 1501 remains pressed against the inner wall of the limiting barrel 9 until it slides to the position of the next set of annular inner grooves 901. Then, the abutment part 1501 will be inserted into the annular inner groove 901, thereby locking the base 12 and the counterweight 10. In this case, Although the base 12 and the counterweight 10 have fallen to a certain height, the actual total distance of their fall is limited to the height difference between two adjacent sets of annular grooves 901 because the columnar spring 14 releases energy to drive the contact part 1501 to always stick to the inner wall of the limiting barrel 9 and continuously search for the annular groove 901. This is much smaller than the fall distance of a completely free fall. Therefore, the impact energy generated has been greatly reduced and is completely within the acceptable range of the equipment. It will not have a substantial impact on the detection results of the force sensor 3, the CCD industrial camera 8, and other workstations.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tester for the heat resistance and creep properties of high-strength chemical fiber filaments, characterized in that, include: A frame, wherein a heat insulation plate is provided inside the frame, and a heating component is provided on the upper part of the frame above the heat insulation plate; A clamping structure is disposed on the upper part of the heat insulation plate, and the clamping structure is connected to a force sensor installed on the top of the frame; A limiting barrel is provided at the lower part of the heat insulation plate, and a counterweight structure is provided inside the limiting barrel; The lifting component is elastically connected to the counterweight structure. The lifting component is connected to the end of the high-strength chemical fiber filament away from the clamping structure. When the high-strength chemical fiber filament breaks, the lifting component and the counterweight structure move away from each other. A support component connects the counterweight structure and the lifting component. The support component can lock the counterweight structure within the limiting barrel when the lifting component and the counterweight structure move away from each other.

2. The heat creep resistance tester for high-strength chemical fiber filaments according to claim 1, characterized in that, The clamping structure includes a connecting frame connected to the force sensor. A micro-motion device is fixedly installed on the connecting frame. A clamping plate is connected to the actuating end of the micro-motion device. When the clamping plate moves toward the micro-motion device, it can clamp the upper end of the high-strength chemical fiber filament.

3. The heat resistance creep tester for high-strength chemical fiber filaments according to claim 1, characterized in that, The counterweight structure includes a base connected to the lifting assembly and multiple sets of counterweights that can be stacked on the base.

4. The heat resistance creep tester for high-strength chemical fiber filaments according to claim 3, characterized in that, The lifting assembly includes a pulling rod that passes through the base and the counterweight. The lower end of the pulling rod is provided with a support part, which is adapted to abut against the base and is adapted to abut against an electric lifting push rod provided on the frame. A cylindrical spring is fitted onto the traction rod, with one end of the cylindrical spring connected to the base and the other end connected to the support.

5. The heat resistance creep tester for high-strength chemical fiber filaments according to claim 4, characterized in that, The lifting assembly also includes a constraint tube disposed on the heat insulation plate and a connecting chain connecting the lower end of the high-strength chemical fiber filament, the connecting chain being able to pass through the constraint tube; The tension rod is equipped with a displacement detection rod, and the frame is equipped with a CCD industrial camera.

6. The heat resistance creep tester for high-strength chemical fiber filaments according to claim 3, characterized in that, The limiting barrel is provided with multiple sets of annular inner grooves at equal intervals along its axial direction.

7. The heat creep resistance tester for high-strength chemical fiber filaments according to claim 6, characterized in that, The support assembly includes multiple sets of deflection hinge rods that are circumferentially and rotatably mounted on the base. The end of each deflection hinge rod away from the base is equipped with an abutment portion that matches the annular inner groove. The support assembly also includes a trigger structure connecting the deflection hinge rod and the support portion. The trigger structure can cause the abutment portion to move toward the annular inner groove when the support portion moves away from the base.

8. The heat creep resistance tester for high-strength chemical fiber filaments according to claim 7, characterized in that, The triggering structure includes a fitting shaft rotatably mounted on the deflection hinge rod and a side plate disposed on the side of the support portion. The side plate is provided with an inclined groove, and the fitting shaft can roll within the inclined groove.

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