A yarn tensile resistance testing device

Abstract

The application discloses a yarn tensile property testing device, which comprises a base and a yarn, a rotating frame for fixing a yarn tube, a wire arranging plate for keeping the yarn parallel, a wire locking mechanism one and a wire locking mechanism two for locking the yarn are arranged in a line on the upper end of the base, the wire locking mechanism two is controlled to move through a stretching mechanism; a wire leading mechanism for leading the yarn to the wire locking mechanism one and the wire locking mechanism two is arranged on one side of the upper end of the base. The yarn is led to move through the wire leading mechanism, is led out through the wire arranging plate, respectively passes through the wire locking mechanism one and the wire locking mechanism two, is then locked through the wire locking mechanism one and the wire locking mechanism two, and finally is stretched for testing through the stretching mechanism, so that the yarn wound on the yarn tube can be clamped and stretched for multiple times, a plurality of groups of data can be obtained, and the testing accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of yarn testing technology, and more specifically to a yarn tensile strength testing device. Background Technology

[0002] Yarn is a type of textile made from various fibers through spinning processes. It is the basic material for weaving, rope making, thread making, knitting, and embroidery. As a core element of the textile industry, yarn not only determines the appearance, feel, and performance of the final textile, but also greatly influences the quality and value of textile products. Tensile strength testing is required during yarn production to detect its parameters.

[0003] Chinese utility model patent CN116840040B discloses a tensile performance testing device and method for paper yarn production and processing. The device includes a mounting plate with two support plates fixedly connected to its top. A bidirectional screw is rotatably connected to the inner wall of each support plate. A motor is fixedly connected to the left side of the support plate. Two movable plates are threaded onto the surface of the bidirectional screw. A motor is installed on the inner wall of each movable plate. A turntable is fixedly connected to the output end of the motor. Two contacting rubber blocks are fixedly connected to the inner wall of the turntable. This invention, through the coordinated operation of the mounting plate, support plates, motor, bidirectional screw, fixed plate, movable plates, motor, turntable, rubber blocks, and storage groove, can ensure the fixation of paper yarn of any diameter and effectively prevent loose clamping, thus ensuring the accuracy of the test. Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: when fixing both ends of the yarn, the yarn can only be manually wound into the storage groove of the rubber block, and then the yarn is subjected to tensile testing by moving the two moving plates in opposite directions. Therefore, only a section of yarn can be tested, and the test data obtained is relatively singular and difficult to represent the quality of the same batch of yarn. If multiple tensile tests are performed, the tester needs to perform multiple manual operations, which is quite troublesome. Therefore, we propose a yarn tensile performance testing device. Summary of the Invention

[0004] The purpose of this invention is to provide a yarn tensile strength testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a yarn tensile strength testing device, comprising a base and a yarn, wherein the yarn is wound on a yarn tube, and the upper end of the base is provided with a rotating frame for fixing the yarn tube, a yarn guide plate for keeping the yarn parallel, a locking mechanism one and a locking mechanism two for locking the yarn.

[0006] Among them, the first wire locking mechanism is fixed on the base, and the second wire locking mechanism is controlled to move by the tensioning mechanism;

[0007] The upper side of the base is provided with a thread guide mechanism for pulling the yarn onto the first and second locking mechanisms.

[0008] The yarn is driven by the yarn guide mechanism, led out by the yarn guide plate, passes through the first locking mechanism and the second locking mechanism, and is then locked by the first locking mechanism and the second locking mechanism.

[0009] Preferably, the locking mechanism includes a U-shaped bracket, with a fixed locking block and a movable locking block respectively provided on both sides of the upper inner end of the U-shaped bracket. The fixed locking block is fixedly installed on the inner side of the U-shaped bracket, and the movable locking block is fixedly installed on the drive block. The drive block is controlled to move by a telescopic rod.

[0010] The fixed locking block end face is provided with multiple wave-shaped grooves, and the movable locking block end face is provided with a boss that matches the grooves;

[0011] The fixed locking block and the movable locking block are made of rubber.

[0012] Preferably, the second locking mechanism is the same as the first locking mechanism, and the second locking mechanism is provided with a push-pull plate on one side, and a tension sensor and a distance sensor are provided on one side of the push-pull plate.

[0013] Preferably, the tensioning mechanism includes a second telescopic rod fixed on the base, the output end of the second telescopic rod being connected to a tension sensor, a first guide rail being provided on the upper end of the base, and the second locking mechanism being slidably connected to the first guide rail via a slider.

[0014] Preferably, the lead-in mechanism includes a clamping mechanism for clamping yarn, which is controlled to move laterally or move up and down via a translation mechanism and a lifting mechanism;

[0015] The wire clamping mechanism includes a base plate, and a guide rail 2 is provided near the lower end of the base plate. Two wire clamping sliders are slidably connected on the guide rail 2, and each of the two wire clamping sliders has a hinge post 1 on its end face.

[0016] The base plate is provided with a telescopic rod three near the upper end, and the output end of the telescopic rod three is provided with a driving block two. The end face of the driving block two is provided with two hinged posts two that match the hinged posts one. The hinged posts two and the hinged posts one are respectively connected by two connecting rods, and the two ends of the connecting rods are respectively hinged to the hinged posts one and the hinged posts two. The lower ends of the two wire clamping sliders are provided with clamping plates, and the inner side of the clamping plates is provided with rubber pads for clamping yarn.

[0017] Preferably, the translation mechanism includes a fixed plate located on the side of the base, a guide rail three is provided on one end face of the fixed plate, a translation plate is slidably connected to the guide rail three, a lead screw is rotatably installed on the other end face of the fixed plate, the lead screw is driven to rotate by a motor, a fixed block is provided on the translation plate, and the fixed block is threadedly connected to the lead screw.

[0018] Preferably, the lifting mechanism includes a second fixed plate, the second fixed plate having a transverse guide groove near its upper end, and both ends of the transverse guide groove extending downwards to form downward inclined guide grooves;

[0019] The translation plate end face is provided with two guide rails four, and the guide rails four are slidably connected to the lifting plate. The lifting plate end face is provided with a fixed shaft, and a roller is rotatably installed on the fixed shaft. The roller is rotatably connected to the transverse guide groove and the downward inclined guide groove.

[0020] A connecting frame is provided on one side of the upper end of the lifting plate, and the wire clamping mechanism is fixedly installed on the connecting frame.

[0021] Preferably, the yarn clamping mechanism has a yarn cutting component on one side for cutting the yarn. The yarn cutting component includes a cutting blade fixed on the clamping plate and a cutting pad for use with the cutting blade. The cutting pad is fixed on another clamping plate.

[0022] Preferably, the rotating frame includes a turntable rotatably mounted on the upper end of the base, and a tensioning column is provided in the middle of the upper end of the turntable, with the yarn tube sleeved on the tensioning column.

[0023] Preferably, the yarn guide plate has a yarn routing opening near its upper end, and the yarn is located inside the yarn routing opening.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The present invention clamps the yarn through a first locking mechanism and a second locking mechanism, and then performs a tension test on the yarn between the first locking mechanism and the second locking mechanism through a tension mechanism. The tension sensor can monitor the tension applied to the yarn in real time, and the distance the yarn is stretched can be detected in real time through a distance measuring sensor.

[0026] The translation mechanism drives the clamping mechanism to move to the left, causing the roller on the fixed shaft to roll in the transverse guide groove. The clamping mechanism descends and clamps the yarn through the downward inclined guide groove at the left end of the transverse guide groove. After clamping the yarn, the translation mechanism drives the clamping mechanism to move to the right again, and the clamping mechanism stops on the right side of the second locking mechanism through the downward inclined guide groove on the right side of the transverse guide groove. Then, the yarn is clamped by the first locking mechanism and the second locking mechanism, and the tensioning mechanism performs a tension test on the yarn between the first locking mechanism and the second locking mechanism. This repeated action can clamp the yarn wound on the yarn tube multiple times and perform multiple tension tests, thereby obtaining multiple sets of data and improving the accuracy of the test. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0029] Figure 3 This is a top view of the present invention;

[0030] Figure 4 This is a side view of the present invention;

[0031] Figure 5 This is a schematic diagram of the wire clamping mechanism of the present invention;

[0032] Figure 6 This is a schematic diagram of the locking mechanism of the present invention;

[0033] Figure 7 This is a schematic diagram of the lifting mechanism of the present invention.

[0034] Figure 8 This is a schematic diagram of the yarn clamping mechanism of the present invention when clamping yarn.

[0035] In the diagram: 1. Base; 2. Yarn; 21. Yarn tube; 3. Rotating frame; 31. Turntable; 32. Tensioning column; 4. Yarn guide plate; 41. Yarn outlet; 5. Locking mechanism one; 51. U-shaped bracket; 52. Fixed locking block; 53. Moving locking block; 54. Drive block one; 55. Telescopic rod one; 56. Groove; 57. Boss; 6. Locking mechanism two; 61. Push-pull plate; 7. Tensioning mechanism; 71. Telescopic rod two; 72. Guide rail one; 8. Thread guiding mechanism; 9. Thread clamping mechanism; 91. Base plate; 92. Guide rail two; 93. Thread clamping slider; 94. Hinge column one; 95. Telescopic rod three; 96. Drive block one; 97. Moving block 2; 98. Hinge column 2; 99. Connecting rod; 90. Clamping plate; 910. Rubber pad; 10. Translation mechanism; 101. Fixed plate 1; 102. Guide rail 3; 103. Translation plate; 104. Lead screw; 105. Motor; 106. Fixed block; 11. Lifting mechanism; 111. Fixed plate 2; 112. Horizontal guide groove; 113. Downward inclined guide groove; 114. Guide rail 4; 115. Lifting plate; 116. Fixed shaft; 117. Roller; 118. Connecting frame; 12. Wire breaking assembly; 121. Cutting knife; 122. Cutting pad; 13. Tension sensor; 14. Distance sensor. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-8 The present invention provides a technical solution: a yarn tensile strength testing device, comprising a base 1 and a yarn 2, the yarn 2 being wound on a yarn tube 21, the upper end of the base 1 having a rotating frame 3 for fixing the yarn tube 21, a yarn guide plate 4 for keeping the yarn 2 parallel, a locking mechanism 5 and a locking mechanism 6 for locking the yarn 2, the locking mechanism 5 being fixed on the base 1, the locking mechanism 6 being controlled to move by a tensioning mechanism 7, the yarn guide plate 4 having a yarn passage 41 near its upper end, the yarn 2 being located inside the yarn passage 41;

[0038] The rotating frame 3 includes a turntable 31 rotatably mounted on the upper end of the base 1, and a tensioning column 32 is provided in the middle of the upper end of the turntable 31. The yarn tube 21 is sleeved on the tensioning column 32.

[0039] The locking mechanism 5 includes a U-shaped bracket 51. The upper end of the U-shaped bracket 51 has a fixed locking block 52 and a movable locking block 53 on its inner sides respectively. The fixed locking block 52 is fixedly installed on the inner side of the U-shaped bracket 51, and the movable locking block 53 is fixedly installed on the drive block 54. The drive block 54 is controlled to move by the telescopic rod 55. The end face of the fixed locking block 52 has a plurality of wave-shaped grooves 56, and the end face of the movable locking block 53 has a boss 57 that matches the grooves 56. The fixed locking block 52 and the movable locking block 53 are made of rubber material.

[0040] The second locking mechanism 6 is the same as the first locking mechanism 5. The second locking mechanism 6 has a push-pull plate 61 on one side, and a tension sensor 13 and a distance sensor 14 are provided on one side of the push-pull plate 61.

[0041] The tensioning mechanism 7 includes a telescopic rod 71 fixed on the base 1. The output end of the telescopic rod 71 is connected to the tension sensor 13. The upper end of the base 1 is provided with a guide rail 72. The locking mechanism 6 is slidably connected to the guide rail 72 through a slider.

[0042] In use, the yarn tube 21 is fitted onto the tensioning column 32, allowing the yarn tube 21 to be fixed on the rotating frame 3. The yarn 2 on the yarn tube 21 is passed through the thread guide 41 on the thread guide plate 4, and then the yarn 2 is pulled through the locking mechanism 5 and the locking mechanism 6, and the yarn 2 is placed inside the locking mechanism 5 and the locking mechanism 6. During the pulling of the yarn 2, the rotating frame 3 rotates so that the yarn tube 21 can be released synchronously. Then, the yarn 2 is clamped by the locking mechanism 5 and the locking mechanism 6. At this time, the telescopic rod 55 controls the drive block 54 and the moving locking block 53 to move towards the fixed locking block 52, finally clamping the yarn 2 between the fixed locking block 52 and the moving locking block 53. The fixed locking block 52 and the moving locking block 53 are made of rubber, and the fixed locking block 52... The end face and the end face of the movable locking block 53 are provided with multiple wave-shaped grooves 56 and bosses 57, which can increase the friction between the yarn 2 and the locking block, so that the yarn 2 cannot be pulled out after being clamped. After the locking mechanism 1 5 and the locking mechanism 2 6 clamp the yarn 2, the tensioning mechanism 7 performs a tension test on the yarn 2 between the locking mechanism 1 5 and the locking mechanism 2 6. At this time, the telescopic rod 2 71 drives the push-pull plate 61 to move, causing the locking mechanism 2 6 to slide to the right, so that the yarn 2 is stretched to the right. The tension sensor 13 can monitor the tension applied to the yarn 2 in real time, and the distance measured by the distance sensor 14 can detect the distance the yarn 2 is stretched in real time. After the yarn 2 breaks, the telescopic rod 2 71 drives the locking mechanism 2 6 to return to the original position, completing one tension test of the yarn 2.

[0043] The upper side of the base 1 is provided with a thread guide mechanism 8 for pulling the yarn 2 onto the thread locking mechanism 5 and the thread locking mechanism 6. The yarn 2 is driven by the thread guide mechanism 8, led out by the thread guide plate 4, passes through the thread locking mechanism 5 and the thread locking mechanism 6 respectively, and is then locked by the thread locking mechanism 5 and the thread locking mechanism 6.

[0044] The lead-in mechanism 8 includes a clamping mechanism 9 for clamping the yarn 2. The clamping mechanism 9 is controlled to move laterally or move up and down by a translation mechanism 10 and a lifting mechanism 11.

[0045] The wire clamping mechanism 9 includes a base plate 91. A guide rail 92 is provided near the lower end of the base plate 91. Two wire clamping sliders 93 are slidably connected on the guide rail 92. Each of the two wire clamping sliders 93 has a hinge post 94 on its end face. A telescopic rod 95 is provided near the upper end of the base plate 91. A drive block 96 is provided at the output end of the telescopic rod 95. Two hinge posts 97 that match the hinge posts 94 are provided at the end face of the drive block 96. The hinge posts 97 and the hinge posts 94 are connected by two connecting rods 98 respectively. The two ends of the connecting rods 98 are hinged to the hinge posts 94 and the hinge posts 97 respectively. Each of the two wire clamping sliders 93 has a clamping plate 99 at its lower end. A rubber pad 910 for clamping the yarn 2 is provided on the inner side of the clamping plate 99.

[0046] The translation mechanism 10 includes a fixed plate 101 located on the side of the base 1. A guide rail 102 is provided on the end face of the fixed plate 101. A translation plate 103 is slidably connected to the guide rail 102. A lead screw 104 is rotatably installed on the other end face of the fixed plate 101. The lead screw 104 is driven to rotate by a motor 105. A fixing block 106 is provided on the translation plate 103. The fixing block 106 is threadedly connected to the lead screw 104.

[0047] The lifting mechanism 11 includes a fixed plate 111. The fixed plate 111 has a horizontal guide groove 112 near its upper end. The two ends of the horizontal guide groove 112 extend downward to form a downward inclined guide groove 113. The end face of the translation plate 103 is provided with two guide rails 114. The guide rails 114 are slidably connected to the lifting plate 115. The end face of the lifting plate 115 is provided with a fixed shaft 116. A roller 117 is rotatably mounted on the fixed shaft 116. The roller 117 is slidably connected to the horizontal guide groove 112 and the downward inclined guide groove 113. A connecting frame 118 is provided on one side of the upper end of the lifting plate 115. The wire clamping mechanism 9 is fixedly mounted on the connecting frame 118.

[0048] The clamping mechanism 9 has a cutting assembly 12 on one side for cutting the yarn 2. The cutting assembly 12 includes a cutting blade 121 fixed on the clamping plate 99 and a cutting pad 122 for use in conjunction with the cutting blade 121. The cutting pad 122 is fixed on another clamping plate 99.

[0049] During the production of yarn 2, multiple tensile tests are required to obtain multiple sets of test data in order to make an accurate quality assessment of the same batch of yarn 2. After the first tensile test is completed, the translation mechanism 10 drives the clamping mechanism 9 to move to the left. At this time, the motor 105 drives the lead screw 104 to rotate, causing the fixed block 106 to drive the translation plate 103 to move to the left. This causes the lifting plate 115 and the connecting frame 118 on the translation plate 103 to move to the left, and the roller 117 on the fixed shaft 116 rolls in the transverse guide groove 112. When the roller 117 moves to the leftmost end of the transverse guide groove 112, the translation plate 103 continues to move to the left, causing the roller 117 to move along the downward inclined guide groove 113. This causes the lifting plate 115 and the connecting frame 118 to descend, causing the clamping mechanism 9 installed on the connecting frame 118 to descend. At this time, the clamping mechanism 9 is located between the yarn guiding plate 4 and the locking mechanism 5. Figure 8Then, the telescopic rod 3 95 controls the drive block 2 96 to rise, and the two hinged connecting rods 98 cause the two wire clamping sliders 93 to move closer to each other on the guide rail 2 92, so that the two clamping plates 99 move closer to each other and clamp the yarn 2 between the wire management plate 4 and the locking mechanism 5. The rubber pads 910 on the inner side of the two clamping plates 99 can increase the friction and prevent the yarn 2 from falling off the inner side of the clamping plates 99. At the same time as the two clamping plates 99 move closer to each other, the cutting blade 121 on one side of the clamping plate 99 cuts off the excess yarn 2 on the right side of the wire clamping mechanism 9 to prevent the excess yarn 2 from tangling with the equipment and affecting the test data. After the wire clamping mechanism 9 clamps the yarn 2, the translation mechanism 10 drives the translation plate 103 to move to the right. At this time, the wire clamping mechanism 9 rises through the downward inclined guide groove 113 and moves to the left through the transverse guide groove 112. The wire clamping mechanism 9 moves to the left after passing through the transverse guide groove 112. When the downward inclined guide 113 at the right end of the guide 112 descends again, the clamping mechanism 9 is located to the right of the locking mechanism 6, and the yarn 2 pulled out by the clamping mechanism 9 is located between the fixed locking block 52 and the movable locking block 53. Then the locking mechanism 5 and the locking mechanism 6 clamp the yarn 2 pulled out by the clamping mechanism 9. The clamping mechanism 9 releases the yarn 2 and returns to the middle of the transverse guide 112. At this time, the tensioning mechanism 7 performs a second tension test on the yarn 2 between the locking mechanism 5 and the locking mechanism 6. Repeating this action can perform multiple tension tests on the yarn 2 wound on the yarn tube 21, thereby obtaining multiple sets of data and improving the accuracy of the test. The waste yarn after each test is cut by the cutter 121. The air gun head (not shown in the figure) is fixed on the base 1 to clean the waste yarn and prevent the waste yarn from sticking to the equipment and affecting the test data. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A yarn tensile strength testing device, comprising a base (1) and a yarn (2), wherein the yarn (2) is wound on a yarn tube (21), characterized in that: The base (1) has a rotating frame (3) for fixing the yarn tube (21), a yarn guide plate (4) for keeping the yarn (2) parallel, a locking mechanism one (5) and a locking mechanism two (6) for locking the yarn (2). Among them, the first locking mechanism (5) is fixed on the base (1), and the second locking mechanism (6) is controlled to move by the tensioning mechanism (7); The base (1) has a lead wire mechanism (8) on one side of its upper end for pulling the yarn (2) onto the locking mechanism one (5) and the locking mechanism two (6). Among them, the yarn (2) is driven by the lead-in mechanism (8), led out by the yarn guide plate (4), passes through the locking mechanism one (5) and the locking mechanism two (6) respectively, and is then locked by the locking mechanism one (5) and the locking mechanism two (6); The lead wire mechanism (8) includes a clamping mechanism (9) for clamping the yarn (2), which is controlled to move laterally or move up and down by a translation mechanism (10) and a lifting mechanism (11). The translation mechanism (10) includes a fixed plate (101) located on the side of the base (1). The end face of the fixed plate (101) is provided with a guide rail (102). A translation plate (103) is slidably connected to the guide rail (102). A lead screw (104) is rotatably installed on the other end face of the fixed plate (101). The lead screw (104) is driven to rotate by a motor (105). A fixed block (106) is provided on the translation plate (103). The fixed block (106) is connected to the lead screw (104) by a thread.

2. The yarn tensile strength testing device according to claim 1, characterized in that: The locking mechanism (5) includes a U-shaped bracket (51). The upper end of the U-shaped bracket (51) has a fixed locking block (52) and a movable locking block (53) on its inner sides respectively. The fixed locking block (52) is fixedly installed on the inner side of the U-shaped bracket (51), and the movable locking block (53) is fixedly installed on the drive block (54). The drive block (54) is controlled to move by the telescopic rod (55). The fixed locking block (52) has multiple wave-shaped grooves (56) on its end face, and the movable locking block (53) has a boss (57) that matches the grooves (56) on its end face. The fixed locking block (52) and the movable locking block (53) are made of rubber.

3. The yarn tensile strength testing device according to claim 1, characterized in that: The second locking mechanism (6) is the same as the first locking mechanism (5). The second locking mechanism (6) has a push-pull plate (61) on one side, and a tension sensor (13) and a distance sensor (14) are provided on one side of the push-pull plate (61).

4. The yarn tensile strength testing device according to claim 3, characterized in that: The tensioning mechanism (7) includes a telescopic rod two (71) fixed on the base (1). The output end of the telescopic rod two (71) is connected to the tension sensor (13). The upper end of the base (1) is provided with a guide rail one (72). The locking mechanism two (6) is slidably connected to the guide rail one (72) through a slider.

5. The yarn tensile strength testing device according to claim 1, characterized in that: The wire clamping mechanism (9) includes a base plate (91), and a guide rail (92) is provided near the lower end of the base plate (91). Two wire clamping sliders (93) are slidably connected on the guide rail (92), and each of the two wire clamping sliders (93) has a hinge post (94) on its end face. The base plate (91) is provided with a telescopic rod three (95) near the upper end. The output end of the telescopic rod three (95) is provided with a driving block two (96). The end face of the driving block two (96) is provided with two hinge pins two (97) that match the hinge pin one (94). The hinge pins two (97) and the hinge pin one (94) are respectively connected by two connecting rods (98), and the two ends of the connecting rods (98) are respectively hinged to the hinge pin one (94) and the hinge pin two (97). Both of the two wire clamping sliders (93) are provided with clamping plates (99) at their lower ends, and the inner side of the clamping plates (99) is provided with rubber pads (910) for clamping the yarn (2).

6. The yarn tensile strength testing device according to claim 5, characterized in that: The lifting mechanism (11) includes a second fixed plate (111), and the second fixed plate (111) is provided with a transverse guide groove (112) near the upper end. The two ends of the transverse guide groove (112) extend downward to the side with downward inclined guide grooves (113). The translation plate (103) has two guide rails (114) on its end face. The guide rails (114) are slidably connected to a lifting plate (115). The lifting plate (115) has a fixed shaft (116) on its end face. A roller (117) is rotatably mounted on the fixed shaft (116). The roller (117) is slidably connected to the transverse guide groove (112) and the downward inclined guide groove (113). The lifting plate (115) has a connecting frame (118) on one side of its upper end, and the wire clamping mechanism (9) is fixedly installed on the connecting frame (118).

7. The yarn tensile strength testing device according to claim 5, characterized in that: The clamping mechanism (9) has a cutting assembly (12) on one side for cutting the yarn (2). The cutting assembly (12) includes a cutting blade (121) fixed on the clamping plate (99) and a cutting pad (122) for use with the cutting blade (121). The cutting pad (122) is fixed on another clamping plate (99).

8. The yarn tensile strength testing device according to claim 1, characterized in that: The rotating frame (3) includes a turntable (31) rotatably mounted on the upper end of the base (1), and a tensioning column (32) is provided in the middle of the upper end of the turntable (31), and the yarn tube (21) is sleeved on the tensioning column (32).

9. The yarn tensile strength testing device according to claim 1, characterized in that: The thread guide plate (4) has a thread outlet (41) near its upper end, and the yarn (2) is located inside the thread outlet (41).

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