A tension testing device for chemical fiber yarn

Abstract

The present invention relates to the technical field of tension testing equipment, and in particular to a tension testing device for chemical fiber yarns, comprising a main frame, a movable plate, an auxiliary detection mechanism, a first locking mechanism, an external limit mechanism, and an end locking mechanism, wherein a stand is fixedly connected to the top of the main frame, a drive screw is rotatably arranged inside the stand, and both ends of the movable plate are threadedly sleeved with the drive screw. The present invention restricts and fixes the two ends of the chemical fiber yarn through a first locking mechanism, a second locking mechanism, a third locking mechanism, and a fourth locking mechanism, effectively preventing the two ends of the chemical fiber yarn from falling off during the detection process, and other properties of the chemical fiber yarn can be detected through the auxiliary detection mechanism, and two different chemical fiber yarns can also be detected at the same time, which can not only improve the functionality of the test device, but also effectively improve the detection efficiency of the chemical fiber yarn, and the end locking mechanism improves the stability of the connection between the two ends of the chemical fiber yarn during the test.

Description

Technical Field

[0001] The invention relates to the technical field of tension testing, in particular to a tension testing device for chemical fiber yarns. Background Art

[0002] Chemical fiber, also known as chemical fiber, is made of natural or artificial polymer compounds. After the preparation of spinning solution, spinning and post-processing, the fiber has textile properties. During the production process of chemical fiber, some of its properties need to be tested, such as the tension and anti-twisting properties of chemical fiber.

[0003] At present, when conducting tension tests on chemical fiber yarns, it is generally completed using a universal tensile testing machine. Before the test, the two ends of the chemical fiber yarn need to be clamped with the clamps on the universal tensile testing machine, and then stretched, so as to test the tension properties of the chemical fiber yarn according to the state of the chemical fiber yarn. However, since chemical fiber yarns are generally relatively thin, sometimes the two ends are prone to fall off first during the stretching process, affecting the progress of the test. In addition, the existing testing device has a single function and can only perform a single property test on a single type of chemical fiber yarn, and its applicability is poor. Summary of the invention

[0004] In order to solve the problems of single function, poor applicability and easy falling off of the end of the existing testing device, the present invention provides a tension testing device for chemical fiber yarn.

[0005] The present invention provides a chemical fiber tension test device that adopts the following technical solution:

[0006] A tension testing device for chemical fiber yarns, comprising:

[0007] The main frame has a top end fixedly connected to a stand frame, and a driving screw is rotatably arranged inside the stand frame;

[0008] A movable plate, both ends of which are threadedly sleeved with the driving screw, the upper and lower ends of the movable plate are respectively fixedly connected with a second locking mechanism and a motor, the output shaft of the motor is fixedly connected with a third locking mechanism, and the top of the stand is fixedly connected with a fourth locking mechanism on one side close to the movable plate, and the internal structures of the second locking mechanism, the third locking mechanism and the fourth locking mechanism are the same as the internal structure of the first locking mechanism;

[0009] An auxiliary detection mechanism, which is arranged on the moving plate, and comprises a driving module arranged inside the moving plate and a contact module arranged outside the moving plate;

[0010] A first locking mechanism, which is fixedly arranged at the top of the main frame, the first locking mechanism comprises a bottom cylinder, a disc and a threaded rod, the bottom cylinder is fixedly connected to the top of the main frame, the disc is fixedly communicated with the bottom cylinder, and the threaded rod is threadedly rotatably connected to the bottom cylinder;

[0011] An external limiting mechanism is arranged outside the stand, and the movable plate is movably connected to the external limiting mechanism;

[0012] The end locking mechanism is provided with a plurality of end locking mechanisms and is installed in the discs of the first locking mechanism, the second locking mechanism, the third locking mechanism and the fourth locking mechanism, and one end of the threaded rod is drivingly connected with the end locking mechanism.

[0013] By adopting the above technical scheme, the two ends of the chemical fiber thread are restricted and fixed by using the first locking mechanism, the second locking mechanism, the third locking mechanism and the fourth locking mechanism, so as to effectively prevent the two ends of the chemical fiber thread from falling off during the detection process, and the other properties of the chemical fiber thread can be detected by the auxiliary detection mechanism, and two different chemical fiber threads can also be detected at the same time, which can not only improve the functionality of the test device, but also effectively improve the detection efficiency of the chemical fiber thread. When fixing the two ends of the chemical fiber thread, it is necessary to first tie the two ends into a ring, and then put them into the end locking mechanism for fixing, so as to improve the stability of the connection between the two ends of the chemical fiber thread during the test, wherein the threaded rod controls the end locking mechanism to work, which is convenient for limiting and removing the end of the chemical fiber thread.

[0014] Optionally, the driving module includes a motor and a threaded screw, the motor is fixedly connected to the inner wall of the movable plate, two threaded screws are provided, a first pulley group is transmission-connected between the motor output shaft and one of the threaded screws, and a second pulley group is connected between the two threaded screws.

[0015] By adopting the above technical solution, the motor is used to provide power, the threaded screw is controlled to work through the first pulley group, and then the second pulley group is used to control another threaded screw to work synchronously, thereby ensuring the stability of the movement of the contact module.

[0016] Optionally, the contact module includes a slide plate, an extension rod, a cylinder and a protrusion, the slide plate is threadedly connected to the threaded screw, the extension rod is fixedly connected to the outer wall of the slide plate, both ends of the cylinder are rotatably connected to the extension rod, there are multiple protrusions that are evenly arranged on the outer wall of the cylinder, and locking nuts are connected between the two ends of the cylinder and the extension rod.

[0017] By adopting the above technical solution and utilizing the material and shape settings of the protrusions, the transverse tensile strength of chemical fiber yarns and their friction tolerance to materials of different shapes can be tested.

[0018] Optionally, there are at least two protrusions of the same shape, and the two protrusions of the same shape are made of different materials, and two cylinders are provided, distributed on the upper and lower sides of the movable plate.

[0019] By adopting the above technical solution and setting the number of cylinders and bumps, it is convenient to test the transverse tensile capacity of two chemical fiber yarns, enrich the functionality of the device, or test the contact friction between a single chemical fiber yarn and different materials.

[0020] Optionally, the end locking mechanism includes a fixed frame, the bottom end of the fixed frame is fixedly connected to the inner bottom wall of the disc, a plurality of racks are sliding in a circular array on the fixed frame, one end of one of the racks is fixedly connected to an end block, a connecting rod is fixedly connected to the end block, the bottom end of the connecting rod extends into the bottom cylinder and is threadedly sleeved with the threaded rod, the top side of the rack is meshed with a gear, both ends of the gear are coaxially fixedly connected to a shaft rod rotatably connected to the fixed frame, a ball head universal joint is connected between two adjacent shaft rods, one end of the rack is fixedly connected to a clamping strip, the top end of the clamping strip is in contact with the inner top wall of the disc.

[0021] By adopting the above technical solution, the distance between the clamping strips is controlled by utilizing the linkage between the rack, gear, shaft and ball joint, so that it is suitable for limiting circular rings of various radii of the ends of chemical fiber yarns, thereby improving the applicability of the testing device.

[0022] Optionally, the disc is coaxially and detachably connected to a constraint tube.

[0023] By adopting the above technical solution, the restraining tube can be used to keep the chemical fiber test part vertical during testing.

[0024] Optionally, a fixing plate is fixedly connected to the inner bottom wall of the bottom cylinder, and one end of the threaded rod is rotatably connected to the fixing plate.

[0025] By adopting the above technical solution, the horizontal movement of the connecting rod is controlled by the rotation of the threaded rod, thereby controlling the movement of the rack.

[0026] Optionally, the external limiting mechanism includes a vertical pole, a limiting sleeve and a connecting block, the bottom end of the vertical pole is fixedly connected to the top end of the main frame, the vertical pole is sleeved with a connecting sleeve fixed to the frame, the limiting sleeve is movably connected to the vertical pole and distributed on both sides of the connecting block, the connecting block is fixedly connected to the outer wall of the movable plate and is slidably connected to the vertical pole.

[0027] By adopting the above technical solution and utilizing the setting of the limit sleeve in the external limit mechanism, the test area can be limited to prevent the movable plate from moving too violently and causing sudden breakage of the chemical fiber.

[0028] Optionally, a control panel is fixedly connected to the outer wall of the main frame, and a servo motor for controlling the rotation of the drive screw is arranged in the stand.

[0029] By adopting the above technical solution, the operation of various electrical components of the test device is controlled by the control panel, and the test data can be displayed intuitively.

[0030] In summary, the present invention includes at least one of the following beneficial technical effects:

[0031] 1. The first locking mechanism, the second locking mechanism, the third locking mechanism and the fourth locking mechanism are used to restrict and fix the two ends of the chemical fiber thread, effectively preventing the two ends of the chemical fiber thread from falling off during the detection process, and the other properties of the chemical fiber thread can be detected by the auxiliary detection mechanism, and two different chemical fiber threads can also be detected at the same time, which can not only improve the functionality of the test device, but also effectively improve the detection efficiency of the chemical fiber thread. When fixing the two ends of the chemical fiber thread, it is necessary to first tie the two ends to form a ring, and then put them into the end locking mechanism for fixing, so as to improve the stability of the connection between the two ends of the chemical fiber thread during the test, wherein the threaded rod controls the end locking mechanism to work, which is convenient for limiting and removing the end of the chemical fiber thread;

[0032] 2. The external limit mechanism can be used to limit the test area to prevent the moving plate from moving too violently, causing the sudden breakage of the chemical fiber and causing damage to the machine and testers, thereby improving the safety of the test and meeting people's use needs;

[0033] 3. The end locking mechanism can be used to limit and fix the ends of chemical fiber yarns of different diameters, thereby preventing the ends of chemical fiber yarns from detaching from the test device during the test process, thereby ensuring the quality and efficiency of chemical fiber yarn testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of a tension testing device for chemical fiber yarn in this embodiment.

[0035] Figure 2 It is a schematic diagram of the three-dimensional structure from another perspective of a tension testing device for chemical fiber yarn in this embodiment.

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the end locking mechanism of a tension testing device for chemical fiber yarn in this embodiment.

[0037] Figure 4 It is a partial cross-sectional structural schematic diagram of an auxiliary detection mechanism of a tension testing device for chemical fiber yarn in this embodiment.

[0038] Figure 5 It is a schematic diagram of the locked state structure of a tension testing device for chemical fiber yarn in this embodiment.

[0039] Figure 6 yes Figure 1 Enlarged structural diagram at A in the middle.

[0040] Description of reference numerals:

[0041] 1. Main frame; 11. Vertical frame; 12. Driving screw rod; 13. Control panel; 2. Moving plate; 3. Auxiliary detection mechanism; 31. Motor; 32. Threaded screw rod; 33. First pulley group; 34. Second pulley group; 35. Slide plate; 36. Extension rod; 37. Cylinder; 38. Bump; 39. Locking nut; 4. First locking mechanism; 41. Bottom cylinder; 42. Disc; 421. Fixed plate; 43. Threaded rod; 44. Restraint tube; 45. Second locking mechanism; 46. Motor; 47. Third locking mechanism; 48. Fourth locking mechanism; 5. External limit mechanism; 51. Vertical rod; 52. Limit sleeve; 53. Connecting block; 6. End locking mechanism; 61. Fixed frame; 62. Rack; 63. End block; 64. Connecting rod; 65. Gear; 66. Shaft; 67. Ball joint; 68. Cardan. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-Figure 6 The present invention is described in further detail.

[0043] The embodiment of the invention discloses a tension testing device for chemical fiber yarns.

[0044] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] Reference Figure 1-Figure 6 , a tension testing device for chemical fiber yarn, comprising:

[0046] The main frame 1 has a stand 11 fixedly connected to its top, a driving screw 12 is rotatably arranged inside the stand 11, a control panel 13 is fixedly connected to the outer wall of the main frame 1, a servo motor for controlling the rotation of the driving screw 12 is arranged inside the stand 11, and the rotation of the driving screw 12 is controlled by the servo motor, thereby controlling the lifting and moving of the movable plate 2, thereby controlling the stretching of the chemical fiber yarn;

[0047] The movable plate 2 has two ends threadedly sleeved with the driving screw 12, and the upper and lower ends of the movable plate 2 are respectively fixedly connected with a second locking mechanism 45 and a motor 46, and the third locking mechanism 47 can be controlled by the motor 46 to rotate, so as to test the anti-twisting performance of the chemical fiber yarn, and the output shaft of the motor 46 is fixedly connected with the third locking mechanism 47, and the top of the stand 11 is fixedly connected with a fourth locking mechanism 48 on the side close to the movable plate 2. The internal structures of the second locking mechanism 45, the third locking mechanism 47 and the fourth locking mechanism 48 are the same as the internal structure of the first locking mechanism 4, and the cooperation and clamping between the first locking mechanism 4 and the second locking mechanism 45 and the cooperation and clamping between the third locking mechanism 47 and the fourth locking mechanism 48 can be used to perform different tests on two or the same chemical fiber yarns at the same time, thereby greatly improving the performance test efficiency of the chemical fiber yarn;

[0048] The auxiliary detection mechanism 3 is arranged on the movable plate 2, and includes a driving module arranged inside the movable plate 2 and a contact module arranged outside the movable plate 2. The movement of the contact module is controlled by the driving module, so as to facilitate the test of the transverse tensile capacity of the chemical fiber yarn;

[0049] A first locking mechanism 4, which is fixedly arranged at the top of the main frame 1, and comprises a bottom cylinder 41, a disc 42 and a threaded rod 43, wherein the bottom cylinder 41 is fixedly connected to the top of the main frame 1, the disc 42 is fixedly communicated with the bottom cylinder 41, and the threaded rod 43 is threadedly rotatably connected with the bottom cylinder 41;

[0050] An external limiting mechanism 5 is arranged outside the stand 11, and the movable plate 2 is movably connected to the external limiting mechanism 5;

[0051] The end locking mechanism 6 is provided with a plurality of end locking mechanisms 6 and is installed in the disc 42 of the first locking mechanism 4, the second locking mechanism 45, the third locking mechanism 47 and the fourth locking mechanism 48. One end of the threaded rod 43 is transmission-connected to the end locking mechanism 6.

[0052] Specifically, in case 1, when performing a tensile test, firstly, the two ends of the chemical fiber to be tested are knotted to leave a ring, and the rings at both ends are inserted into the end locking mechanism 6, such as Figure 5 As shown, the clamping strip 68 of the end locking mechanism 6 has a head that acts as a block. When the ring is inserted, the end locking mechanism 6 expands outward so that the clamping strip 68 blocks the ring, so that the chemical fiber yarn will not fall off. After the fixation is completed, the servo motor is started to control the rotation of the driving screw 12, thereby controlling the movement of the moving plate 2 to perform a tensile test on the chemical fiber yarn.

[0053] Situation 2: When performing the twist test of the chemical fiber yarn, the two ends of the chemical fiber yarn are also fixed first. It should be noted that the two ends of the chemical fiber yarn are fixed by the third locking mechanism 47 and the fourth locking mechanism 48 respectively, and the motor 46 is started to control the third locking mechanism 47 to rotate, so as to twist the chemical fiber yarn and complete the twist performance test of the chemical fiber yarn;

[0054] Scenario 3: When conducting the transverse tensile performance test of chemical fiber yarn, the test is completed through the auxiliary detection mechanism 3, so that the device can specifically complete the performance test of various chemical fiber yarns, greatly improving the applicability and functionality of the device.

[0055] Reference Figure 4 Specifically, in the embodiment of the present invention, the driving module includes a motor 31 and a threaded screw 32. The motor 31 is fixedly connected to the inner wall of the movable plate 2. Two threaded screws 32 are provided. A first pulley group 33 is transmission-connected between the output shaft of the motor 31 and one of the threaded screws 32. A second pulley group 34 is connected between the two threaded screws 32.

[0056] In an embodiment of the present invention, when conducting a transverse tensile performance test of chemical fiber yarn, the motor 31 drives the first pulley group 33 to work, thereby driving the threaded screw 32 to rotate, and drives the other threaded screw 32 to rotate through the second pulley group 34, thereby ensuring the synchronization of the contact module movement.

[0057] Reference Figure 1 and Figure 2 Specifically, in the embodiment of the present invention, the contact module includes a slide plate 35, an extension rod 36, a cylinder 37 and a protrusion 38. The slide plate 35 is threadedly sleeved with the threaded screw 32, the extension rod 36 is fixedly connected to the outer wall of the slide plate 35, and both ends of the cylinder 37 are rotatably connected to the extension rod 36. There are multiple protrusions 38, which are evenly arranged on the outer wall of the cylinder 37. There are at least two protrusions 38 of the same shape, and the two protrusions 38 of the same shape are made of different materials. There are two cylinders 37, which are distributed on the upper and lower sides of the movable plate 2, and locking nuts 39 are connected between the two ends of the cylinder 37 and the extension rod 36.

[0058] In the embodiment of the present invention, when conducting a transverse tensile performance test on chemical fiber yarns, the threaded screw 32 drives the slide plate 35 to move and contact the straightened chemical fiber yarns. At this time, the cylinder 37 is adjusted to a circular arc surface to contact the chemical fiber yarns. When it is necessary to test the friction resistance between the chemical fiber yarns and different materials and shapes, the cylinder 37 can be selectively rotated so that different protrusions 38 squeeze the chemical fiber yarns. The upper and lower groups are carried out simultaneously, thereby facilitating the formation of a comparative test, thereby ensuring the accuracy of the test data.

[0059] Reference Figure 3 and Figure 5Specifically, in the embodiment of the present invention, the end locking mechanism 6 includes a fixed frame 61, the bottom end of the fixed frame 61 is fixedly connected to the inner bottom wall of the disc 42, and a plurality of racks 62 are slidably arranged in a circular array on the fixed frame 61, one end of one of the racks 62 is fixedly connected to an end block 63, and a connecting rod 64 is fixedly connected to the end block 63, the bottom end of the connecting rod 64 extends into the bottom cylinder 41 and is threadedly sleeved with the threaded rod 43, and a gear 65 is meshed and transmitted on the top side of the rack 62, and shafts 66 rotatably connected to the fixed frame 61 are coaxially fixedly connected at both ends of the gear 65, and a ball head universal joint 67 is connected between two adjacent shafts 66 to facilitate the synchronous movement of each rack 62, and a clamping strip 68 is fixedly connected to one end of the rack 62, and the top end of the clamping strip 68 contacts the inner top wall of the disc 42.

[0060] In the embodiment of the present invention, when limiting the two ends of the chemical fiber yarn, the rack 62 is first controlled to move, and each clamping strip 68 is contracted to ensure that the circular ring formed by the end of the chemical fiber yarn can be inserted into the limiting area of ​​the clamping strip 68. After the end of the chemical fiber yarn is inserted, the threaded rod 43 is rotated to control the horizontal displacement of the connecting rod 64, thereby driving one of the racks 62 to move, and then driving the shaft rod 66 to rotate through the engagement between the rack 62 and the gear 65. Due to the connection of the ball head universal joint 67, the adjacent shaft rods 66 rotate synchronously, thereby controlling the rotation of the gear 65, and the gear 65 is engaged with the rack 62 to control the outward expansion of the rack 62, so as to limit and fix the circular ring end of the chemical fiber yarn.

[0061] Reference Figure 1 and Figure 2 Specifically, in the embodiment of the present invention, the disc 42 is coaxially and detachably connected with a constraint tube 44 .

[0062] In the embodiment of the present invention, when in use, the chemical fiber thread passes through the restraining tube 44. It should be noted that the restraining tube 44 can be replaced with an existing test fixture to improve the stability of the chemical fiber thread.

[0063] Reference Figure 1 and Figure 3 Specifically, in the embodiment of the present invention, the inner bottom wall of the bottom tube 41 is fixedly connected with a fixing plate 421 , and one end of the threaded rod 43 is rotatably connected with the fixing plate 421 .

[0064] In the embodiment of the present invention, the movement of the connecting rod 64 is controlled by rotating the threaded rod 43 , wherein the fixing plate 421 imposes certain restrictions on the movement of the connecting rod 64 to avoid strong squeezing between the clamping strips 68 , thereby extending the service life of the clamping strips 68 .

[0065] Reference Figure 1Specifically, in the embodiment of the present invention, the external limiting mechanism 5 includes a vertical rod 51, a limiting sleeve 52 and a connecting block 53. The bottom end of the vertical rod 51 is fixedly connected to the top of the main frame 1. The vertical rod 51 is sleeved with a connecting sleeve fixed to the frame 11. The limiting sleeve 52 is movably connected to the vertical rod 51 and is distributed on both sides of the connecting block 53. The connecting block 53 is fixedly connected to the outer wall of the movable plate 2 and is slidably connected to the vertical rod 51.

[0066] In the embodiment of the present invention, before use, the distance between the limit sleeves 52 is first adjusted so that the connecting block 53 slides between the two limit sleeves 52, thereby limiting the moving range of the movable plate 2 and effectively preventing the movable plate 2 from moving too violently, causing sudden breakage of the chemical fiber filaments. It can also prevent collision between the third locking mechanism 47 and the fourth locking mechanism 48.

[0067] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tension test device for chemical fiber, characterized in that: include: A main frame (1), the top of which is fixedly connected to a stand frame (11), wherein a driving screw rod (12) is rotatably arranged inside the stand frame (11); A movable plate (2), both ends of which are threadedly sleeved with the driving screw (12); the upper and lower ends of the movable plate (2) are respectively fixedly connected with a second locking mechanism (45) and a motor (46); the output shaft of the motor (46) is fixedly connected with a third locking mechanism (47); the top of the stand (11) is fixedly connected with a fourth locking mechanism (48) on a side close to the movable plate (2); the internal structures of the second locking mechanism (45), the third locking mechanism (47) and the fourth locking mechanism (48) are the same as the internal structure of the first locking mechanism (4); an auxiliary detection mechanism (3) arranged on the movable plate (2), comprising a driving module arranged inside the movable plate (2) and a contact module arranged outside the movable plate (2); a first locking mechanism (4) fixedly arranged at the top end of the main frame (1), the first locking mechanism (4) comprising a bottom cylinder (41), a disc (42) and a threaded rod (43), the bottom cylinder (41) being fixedly connected to the top end of the main frame (1), the disc (42) being fixedly connected to the bottom cylinder (41), and the threaded rod (43) being threadedly rotatably connected to the bottom cylinder (41); An external limiting mechanism (5) is arranged outside the stand (11); The end locking mechanism (6) is provided with a plurality of end locking mechanisms (6) and is installed in the disk (42) of the first locking mechanism (4), the second locking mechanism (45), the third locking mechanism (47) and the fourth locking mechanism (48); one end of the threaded rod (43) is drivingly connected to the end locking mechanism (6); the end locking mechanism (6) comprises a fixing frame (61); the bottom end of the fixing frame (61) is fixedly connected to the inner bottom wall of the disk (42); the fixing frame (61) is slidably connected to a plurality of racks (62) in a circular array; one end of one of the racks (62) is fixedly connected to an end block (63); the end block (63) is fixedly connected to a connecting rod (64); the bottom end of the connecting rod (64) extends into the bottom cylinder (41) and is connected to the threaded rod (43) The rod (43) is threadedly sleeved, and the top side of the rack (62) is meshed with a gear (65). The two ends of the gear (65) are coaxially fixedly connected to a shaft (66) rotatably connected to the fixed frame (61). A ball head universal joint (67) is connected between two adjacent shafts (66). One end of the rack (62) is fixedly connected to a clamping strip (68), and the top end of the clamping strip (68) contacts the inner top wall of the disk (42). When limiting the two ends of the chemical fiber yarn, each clamping strip (68) is firstly contracted to ensure that the circular ring formed by the knotted end of the chemical fiber yarn can be inserted into the limiting area of ​​the clamping strip (68). After the end of the chemical fiber yarn is inserted, the threaded rod (43) is rotated to control the rack (62) to expand outward, so as to limit and fix the circular ring end of the chemical fiber yarn.

2. A tension test device for chemical fiber according to claim 1, characterized in that: The driving module comprises a motor (31) and a threaded screw (32); the motor (31) is fixedly connected to the inner wall of the movable plate (2); two threaded screws (32) are provided; a first pulley group (33) is transmission-connected between the output shaft of the motor (31) and one of the threaded screws (32); and a second pulley group (34) is connected between the two threaded screws (32).

3. A tension test device for chemical fiber according to claim 2, characterized in that: The contact module comprises a slide plate (35), an extension rod (36), a cylinder (37) and a bump (38); the slide plate (35) is threadedly sleeved with a threaded screw rod (32); the extension rod (36) is fixedly connected to the outer wall of the slide plate (35); and both ends of the cylinder (37) are rotatably connected to the extension rod (36); a plurality of bumps (38) are provided and are evenly arranged on the outer wall of the cylinder (37); and locking nuts (39) are connected between the two ends of the cylinder (37) and the extension rod (36).

4. A tension test device for chemical fiber according to claim 3, characterized in that: There are at least two protrusions (38) of the same shape, and the two protrusions (38) of the same shape are made of different materials; and there are two cylinders (37), which are distributed on the upper and lower sides of the movable plate (2).

5. The tension testing device for chemical fiber according to claim 1, characterized in that: The disc (42) is coaxially and detachably connected to a restraining pipe (44).

6. A tension test device for chemical fiber according to claim 1, characterized in that: A fixing plate (421) is fixedly connected to the inner bottom wall of the bottom cylinder (41), and one end of the threaded rod (43) is rotatably connected to the fixing plate (421).

7. A tension test device for chemical fiber according to claim 1, characterized in that: The movable plate (2) is movably connected to the external limiting mechanism (5), and the external limiting mechanism (5) comprises a vertical rod (51), a limiting sleeve (52) and a connecting block (53); the bottom end of the vertical rod (51) is fixedly connected to the top end of the main frame (1), and the vertical rod (51) is sleeved with a connecting sleeve fixed to the vertical frame (11); the limiting sleeve (52) is movably connected to the vertical rod (51) and is distributed on both sides of the connecting block (53); the connecting block (53) is fixedly connected to the outer wall of the movable plate (2) and is slidably connected to the vertical rod (51).

8. The tension testing device for chemical fiber according to claim 1, characterized in that: A control panel (13) is fixedly connected to the outer wall of the main frame (1), and a servo motor for controlling the rotation of the drive screw (12) is arranged in the stand (11).

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