Device for detecting tensile strength of heavy-twisted covering yarn

Abstract

The invention relates to the technical field of material mechanical property detection, in particular to a heavy-twist covering yarn tensile strength detection device which comprises a base, two rectangular seats are arranged on the base, supporting seats are symmetrically and fixedly installed at the upper ends of the rectangular seats, and a rotating shaft is rotatably installed between the two supporting seats. A first clamping block is fixedly connected to the rotating shaft in a sleeving mode, a second clamping block is installed on the first clamping block through an installation assembly, an adjusting assembly used for driving the second clamping block to get close is arranged on the first clamping block, a strip-shaped rod is fixedly installed at one end of the rotating shaft, and a positioning rod is installed at one end of the strip-shaped rod. Yarn is clamped between the first clamping block and the second clamping block, the yarn is wound on the first clamping block and the second clamping block, a better clamping and fixing effect on one end of the yarn is achieved, the phenomenon that the yarn slips in the detection process is avoided, deviation of detection data is avoided, and the accuracy and reliability of a detection result are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of material mechanical property testing, and particularly relates to a tensile strength testing device for strongly twisted core-spun yarns. Background Art

[0002] Due to its unique structure in which the outer layer fibers tightly wind around the core yarn, strongly twisted core-spun yarns exhibit properties such as high strength, low elongation, and excellent wear resistance, and are widely used in many fields such as textiles, clothing, and industrial textiles. In these application scenarios, tensile strength is one of the crucial performance indicators of strongly twisted core-spun yarns. It not only determines whether the yarn can withstand mechanical tensile forces during the weaving process but also directly affects the durability and wearing comfort of the final products in daily use, thus playing a decisive role in product quality and usage effects.

[0003] When testing the tensile strength of yarns, it is necessary to clamp and fix both ends of the yarn. However, the existing clamping devices only rely on two clamping blocks to clamp and fix both ends of the yarn, resulting in poor clamping effects. The yarn is extremely prone to slipping during the testing process, leading to deviations in the test data and affecting the accuracy and reliability of the test results. Summary of the Invention

[0004] The purpose of the present invention is to solve the following drawbacks in the prior art: When testing the tensile strength of yarns, it is necessary to clamp and fix both ends of the yarn. However, the existing clamping devices only rely on two clamping blocks to clamp and fix both ends of the yarn, resulting in poor clamping effects. The yarn is extremely prone to slipping during the testing process, leading to deviations in the test data and affecting the accuracy and reliability of the test results. Therefore, a tensile strength testing device for strongly twisted core-spun yarns is proposed.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A tensile strength testing device for strongly twisted core-spun yarns, comprising a base. Two rectangular seats are provided on the base. One of the rectangular seats is fixedly installed on the base, and the other rectangular seat is slidably installed on the base through a sliding component. A stretching component for pulling the rectangular seat to move is provided on the base;

[0007] Support seats are symmetrically and fixedly installed at the upper ends of the rectangular seats. A rotating shaft is rotatably installed between the two support seats. A first clamping block is fixedly sleeved on the rotating shaft. A second clamping block is installed on the first clamping block through an installation component. There is a gap between the first clamping block and the second clamping block. The first clamping block and the second clamping block can be spliced into a cylinder. An adjusting component for driving the second clamping block to approach is provided on the first clamping block;

[0008] One end of the rotating shaft is fixedly installed with a strip-shaped rod. One end of the strip-shaped rod is provided with a moving hole, and a positioning rod is horizontally and slidably inserted into the moving hole. A locking assembly for locking the positioning rod is provided on one of the support seats.

[0009] As a preferred solution, a plurality of sliding jacks are provided on the first clamping block. The installation assembly includes a plurality of sliding rods respectively vertically and slidably inserted into the plurality of sliding jacks and a plurality of stoppers respectively fixedly installed at the lower ends of the plurality of sliding rods. One end of each of the plurality of sliding rods is fixedly connected to the clamping surface of the second clamping block.

[0010] As a preferred solution, the adjusting assembly includes two mounting blocks respectively fixedly installed at both ends of the first clamping block, two bolts respectively vertically rotatably installed on the two mounting blocks, and two connecting blocks respectively threadedly sleeved on the two bolts. The two connecting blocks are respectively fixedly connected to both ends of the second clamping block.

[0011] As a preferred solution, the locking assembly includes a locking block fixedly installed on the side surface of the support seat and a magnetic attraction component for adsorbing the positioning rod on the locking block. A locking groove is provided on the side surface of the locking block, and one end of the positioning rod can be inserted into the locking groove.

[0012] As a preferred solution, the magnetic attraction component includes an iron ring fixedly sleeved on the positioning rod and an annular magnetic sheet fixedly installed on the locking block. A limiting block is fixedly installed at one end of the positioning rod away from the locking block, and the strip-shaped rod is located between the iron ring and the limiting block.

[0013] As a preferred solution, sliding holes are symmetrically provided on one of the rectangular seats. The sliding assembly includes two slide rails respectively slidably inserted into the two sliding holes, and the two slide rails are both horizontally and fixedly installed on the base.

[0014] As a preferred solution, the stretching assembly includes a stretching motor fixedly installed on the base, a stretching rod horizontally fixedly installed at the output end of the stretching motor, a bracket fixedly installed on the side surface of the rectangular seat, and a tension sensor fixedly installed at one end of the bracket. One end of the stretching rod is fixedly connected to the output end of the tension sensor.

[0015] As a preferred solution, a positioning sleeve is slidably sleeved on the stretching rod. The positioning sleeve is horizontally and fixedly installed above the base through a support frame. A scale is horizontally fixedly installed on the support frame. An indicating rod is fixedly installed at one end of the stretching rod, and one end of the indicating rod points to the scale.

[0016] As a preferred solution, two semi-circular first protective covers are provided between the two rectangular seats. Both of the first protective covers are mounted on the base through elastic components. A fixing block is fixedly installed on the side of the first protective cover. A circular hole is horizontally opened on the fixing block. A round rod is horizontally and slidably installed in the circular hole. One end of the round rod is fixedly installed with a second protective cover through a rectangular block. One end of the second protective cover is slidably inserted into the first protective cover. A pull rope is fixedly installed at one end of the second protective cover close to the stretching component. One end of the pull rope is fixedly connected to the support seat.

[0017] As a preferred solution, the elastic component includes a support column vertically and fixedly installed on the base, a rectangular rod horizontally and slidably installed on the support column, a pull rod fixedly installed at one end of the rectangular rod, and a telescopic spring sleeved on the rectangular rod. One end of the rectangular rod is fixedly connected to the first protective cover. Two ends of the telescopic spring are respectively fixedly connected to the support column and the first protective cover.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. When performing a tensile test on the yarn, one end of the yarn is placed in the gap between the first clamping block and the second clamping block, and then it is clamped between the first clamping block and the second clamping block through the adjusting component. Through the mutual cooperation of the rotating shaft, the strip-shaped rod and the locking component, the yarn is wound around the first clamping block and the second clamping block, achieving a better clamping and fixing effect on one end of the yarn, avoiding the phenomenon of the yarn slipping during the detection process, preventing deviation of the detection data, and ensuring the accuracy and reliability of the detection result.

[0020] 2. The stretching speed is precisely controlled by the stretching motor and the stretching rod, which can simulate the stretching conditions of the yarn under different usage scenarios. At the same time, through the mutual cooperation of the stretching rod, the scale and the indicating rod, the displacement of the stretching rod, that is, the stretching length of the yarn, is detected in real time, and the tensile strength of the yarn can be calculated quickly and accurately.

[0021] 3. During the tensile test of the yarn, the two first protective covers and the two second protective covers are closed together to cover the yarn inside, avoiding the yarn being ejected around and accidentally injuring the staff at the moment of fracture. The setting of the first protective cover and the second protective cover can improve the safety of the detection device during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a right-side three-dimensional structural schematic diagram of a tensile strength detection device for high-twist core-spun yarn proposed by the present invention;

[0023] Figure 2 It is a left-side three-dimensional structural schematic diagram of a tensile strength detection device for high-twist core-spun yarn proposed by the present invention;

[0024] Figure 3 This is a partial three-dimensional structural schematic diagram of a tensile strength detection device for a high-twist core-spun yarn proposed by the present invention;

[0025] Figure 4 is Figure 3 the enlarged structural schematic diagram at position A in;

[0026] Figure 5 the structural schematic diagram of the stretching component;

[0027] Figure 6 the three-dimensional structural schematic diagram of the sliding component, rectangular seat, first clamping block and second clamping block;

[0028] Figure 7 the three-dimensional structural schematic diagram of the support seat, rotating shaft, first clamping block, second clamping block, positioning rod and locking component;

[0029] Figure 8 is Figure 7 the enlarged structural schematic diagram at position B in;

[0030] Figure 9 the three-dimensional structural schematic diagram of the elastic component, first protective cover and second protective cover.

[0031] In the figure: 1 base, 2 rectangular seat, 3 support seat, 4 rotating shaft, 5 first clamping block, 6 second clamping block, 7 strip-shaped rod, 8 positioning rod, 9 sliding rod, 10 stop block, 11 mounting block, 12 bolt, 13 connecting block, 14 locking block, 15 iron ring, 16 annular magnetic sheet, 17 limiting block, 18 slide rail, 19 stretching motor, 20 stretching rod, 21 bracket, 22 tension sensor, 23 positioning sleeve, 24 support frame, 25 scale, 26 indicating rod, 27 first protective cover, 28 fixing block, 29 round rod, 30 second protective cover, 31 pulling rope, 32 support column, 33 rectangular rod, 34 pull rod, 35 telescopic spring. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0033] Refer to Figures 1-9, A device for detecting the tensile strength of tightly twisted core-spun yarn, comprising a base 1. There are two rectangular seats 2 on the base 1. One of the rectangular seats 2 is fixedly installed on the base 1, and the other rectangular seat 2 is slidably installed on the base 1 through a sliding component. There is a stretching component on the base 1 for pulling the rectangular seat 2 to move. Symmetrically fixed on the upper end of the rectangular seat 2 are support seats 3. A rotating shaft 4 is rotatably installed between the two support seats 3. A first clamping block 5 is fixedly sleeved on the rotating shaft 4. A second clamping block 6 is installed on the first clamping block 5 through an installation component. There is a gap between the first clamping block 5 and the second clamping block 6. The first clamping block 5 and the second clamping block 6 can be spliced into a cylinder. There is an adjusting component on the first clamping block 5 for driving the second clamping block 6 to approach. One end of the rotating shaft 4 is fixedly installed with a strip-shaped rod 7. A moving hole is opened at one end of the strip-shaped rod 7. A positioning rod 8 is horizontally slidably inserted in the moving hole. There is a locking component on one of the support seats 3 for locking the positioning rod 8.

[0034] The first clamping block 5 and the second clamping block 6 are installed together through an installation component. The first clamping block 5 and the second clamping block 6 can be spliced into a complete cylinder. During the rotation of the rotating shaft 4, it can drive the first clamping block 5 and the second clamping block 6 to rotate between the two support seats 3. When one end of the positioning rod 8 is locked by the locking component, the rotation of the rotating shaft 4 can be restricted.

[0035] When detecting the tensile strength of the yarn, one end of the yarn is placed between the first clamping block 5 and the second clamping block 6. Then, the second clamping block 6 is driven to move towards the first clamping block 5 through the adjusting component, so as to clamp and fix one end of the yarn between the first clamping block 5 and the second clamping block 6. Then, the locking of the positioning rod 8 is released, and the rotating shaft 4 is rotated through the strip-shaped rod 7, while driving the first clamping block 5 and the second clamping block 6 to rotate between the two support seats 3, and winding the yarn between the first clamping block 5 and the second clamping block 6, which has a better effect of clamping and fixing one end of the yarn, avoiding the phenomenon of yarn slipping during the detection process, avoiding deviation of the detection data, and ensuring the accuracy and reliability of the detection results.

[0036] A plurality of sliding insertion holes are opened on the first clamping block 5. The installation component includes a plurality of slide rods 9 respectively vertically slidably inserted in the plurality of sliding insertion holes and a plurality of stoppers 10 respectively fixedly installed at the lower ends of the plurality of slide rods 9. One ends of the plurality of slide rods 9 are fixedly connected to the clamping surface of the second clamping block 6. The plurality of slide rods 9 slide in the plurality of insertion holes. The second clamping block 6 can move on the first clamping block 5 through the plurality of slide rods 9. The plurality of stoppers 10 can prevent the plurality of slide rods 9 from detaching from the first clamping block 5.

[0037] The adjusting assembly includes two mounting blocks 11 respectively and fixedly installed at both ends of the first clamping block 5, two bolts 12 respectively and vertically rotatably installed on the two mounting blocks 11, and two connecting blocks 13 respectively threadedly sleeved on the two bolts 12. The two connecting blocks 13 are respectively fixedly connected to both ends of the second clamping block 6. When one end of the yarn is placed between the first clamping block 5 and the second clamping block 6, a wrench tool is used to rotate the bolt 12. During the rotation of the bolt 12, under the action of the thread, the connecting block 13 can be driven to move towards the first clamping block 5, thereby driving the second clamping block 6 to approach the first clamping block 5 until the first clamping block 5 contacts the second clamping block 6, and one end of the yarn is clamped and fixed between the first clamping block 5 and the second clamping block 6. Rubber pads can be adhered to the opposite sides of the first clamping block 5 and the second clamping block 6. The rubber pads can increase the friction with the yarn and further improve the stability of clamping and fixing.

[0038] The locking assembly includes a locking block 14 fixedly installed on the side of the support base 3 and a magnetic attraction component for adsorbing the positioning rod 8 on the locking block 14. A locking groove is provided on the side of the locking block 14. One end of the positioning rod 8 can be inserted into the locking groove. The magnetic attraction component includes an iron ring 15 fixedly sleeved on the positioning rod 8 and an annular magnetic sheet 16 fixedly installed on the locking block 14. A limiting block 17 is fixedly installed at the end of the positioning rod 8 away from the locking block 14. The strip-shaped rod 7 is located between the iron ring 15 and the limiting block 17.

[0039] When one end of the positioning rod 8 is inserted into the locking groove provided in the locking block 14, the rotation of the rotating shaft 4 can be restricted by the strip-shaped rod 7. At the same time, when the positioning rod 8 is inserted into the locking groove, the iron ring 15 contacts the annular magnetic sheet 16. Under the action of magnetic force, it is avoided that one end of the positioning rod 8 disengages from the locking groove during the detection process. When it is necessary to wind the yarn around the first clamping block 5 and the second clamping block 6, the limiting block 17 is pulled to take out one end of the positioning rod 8 from the locking groove. Then, by shaking the positioning rod 8, the rotating shaft 4 can be driven to rotate. The rotating shaft 4 can be driven to rotate three to four circles, and then one end of the positioning rod 8 is inserted into the locking groove.

[0040] Sliding holes are symmetrically provided on one of the rectangular seats 2. The sliding assembly includes two slide rails 18 respectively and slidably inserted into the two sliding holes. The two slide rails 18 are both horizontally and fixedly installed on the base 1. One of the rectangular seats 2 horizontally slides on the base 1 through the slide rails 18, and the movable rectangular seat 2 can be moved to realize the stretching of the yarn.

[0041] The stretching component includes a stretching motor 19 fixedly installed on the base 1, a stretching rod 20 horizontally fixedly installed at the output end of the stretching motor 19, a bracket 21 fixedly installed on the side of the rectangular seat 2, and a tensile force sensor 22 fixedly installed at one end of the bracket 21. One end of the stretching rod 20 is fixedly connected to the output end of the tensile force sensor 22. The stretching motor 19 is controlled by a controller and can drive the stretching rod 20 to move at a set speed. When the stretching rod 20 moves, it will drive the tensile force sensor 22 to move towards the stretching motor 19, and at the same time drive the slidable rectangular seat 2 to move towards the stretching motor 19 through the bracket 21. While realizing the stretching test of the yarn, the magnitude of the tensile force can be detected by the tensile force sensor 22. The tensile force sensor 22 transmits the collected data to the control and processing unit, and the control and processing unit analyzes and processes the data to calculate the tensile strength of the yarn.

[0042] A positioning sleeve 23 is slidably sleeved on the stretching rod 20. The positioning sleeve 23 is horizontally fixedly installed above the base 1 through a support frame 24. A scale 25 is horizontally fixedly installed on the support frame 24. One end of the stretching rod 20 is fixedly installed with an indicating rod 26. One end of the indicating rod 26 points to the scale 25. The positioning sleeve 23 plays a role in supporting the stretching rod 20 to ensure the horizontal movement of the stretching rod 20. At the same time, when the stretching rod 20 moves, it will drive the indicating rod 26 at one end to move. The moving distance of the stretching rod 20 can be read through the scale 25 to detect the displacement of the stretching rod 20 in real time, that is, the stretching length of the yarn.

[0043] There are two semi-circular first protective covers 27 between the two rectangular seats 2. Both of the two first protective covers 27 are installed on the base 1 through elastic components. A fixed block 28 is fixedly installed on the side of the first protective cover 27. A circular hole is horizontally opened on the fixed block 28. A round rod 29 is horizontally slidably installed in the circular hole. One end of the round rod 29 is fixedly installed with a second protective cover 30 through a rectangular block. One end of the second protective cover 30 is slidably inserted into the first protective cover 27. A pull rope 31 is fixedly installed at one end of the second protective cover 30 close to the stretching component. One end of the pull rope 31 is fixedly connected to the support seat 3. The elastic component includes a support column 32 vertically fixedly installed on the base 1, a rectangular rod 33 horizontally slidably installed on the support column 32, a pull rod 34 fixedly installed at one end of the rectangular rod 33, and a telescopic spring 35 sleeved on the rectangular rod 33. One end of the rectangular rod 33 is fixedly connected to the first protective cover 27. Both ends of the telescopic spring 35 are fixedly connected to the support column 32 and the first protective cover 27 respectively.

[0044] The second protective cover 30 is horizontally slidably mounted on the first protective cover 27 through the fixed block 28 and the round rod 29. When the two first protective covers 27 come into contact, the two first protective covers 27 can be closed into a circular tube to wrap the stretched yarn inside, preventing the yarn from being ejected around and accidentally injuring the staff at the moment of breakage. The settings of the first protective cover 27 and the second protective cover 30 can improve the safety of the detection device during the detection process.

[0045] While the slidable rectangular seat 2 stretches the yarn, the pull rope 31 mounted on the support seat 3 can drive the second protective cover 30 to slide horizontally on the first protective cover 27, thereby extending the overall length of the first protective cover 27 and the second protective cover 30, so as to ensure that the yarn is wrapped throughout. The pull rod 34 can be pulled to drive the rectangular rod 33 to move away from the first protective cover 27, which can drive the two first protective covers 27 to separate, and the telescopic spring 35 is compressed, facilitating the placement of the yarn inside the two first protective covers 27. Under the action of the elastic force of the telescopic spring 35, when the pull rod 34 is released, the two first protective covers 27 will automatically close.

[0046] In the present invention, when the tensile strength of the yarn is detected, one end of the yarn is placed between the first clamping block 5 and the second clamping block 6, and then the second clamping block 6 is driven to move towards the first clamping block 5 through the adjusting assembly, so as to clamp and fix one end of the yarn between the first clamping block 5 and the second clamping block 6. Then, the locking of the positioning rod 8 is released, and the rotating shaft 4 is rotated through the bar-shaped rod 7, while driving the first clamping block 5 and the second clamping block 6 to rotate between the two support seats 3, and the yarn is wound between the first clamping block 5 and the second clamping block 6, achieving a better clamping and fixing effect on one end of the yarn, preventing the yarn from slipping during the detection process, avoiding deviation of the detection data, and ensuring the accuracy and reliability of the detection result.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A device for detecting tensile strength of a high-twist core-spun yarn, comprising a base (1), characterized in that: The base (1) is provided with two rectangular seats (2), one of which is fixedly mounted on the base (1), and the other of which is slidably mounted on the base (1) via a sliding assembly, and the base (1) is provided with a stretching assembly for pulling the rectangular seat (2) to move; A support seat (3) is symmetrically fixedly installed on the upper end of the rectangular seat (2); a rotating shaft (4) is rotatably installed between the two support seats (3); a first clamping block (5) is fixedly sleeved on the rotating shaft (4); a second clamping block (6) is installed on the first clamping block (5) through a mounting assembly; a gap exists between the first clamping block (5) and the second clamping block (6); the first clamping block (5) and the second clamping block (6) can be spliced ​​into a cylinder; and an adjusting assembly for driving the second clamping block (6) to approach is provided on the first clamping block (5); A strip rod (7) is fixedly mounted on one end of the rotating shaft (4), a movable hole is opened at one end of the strip rod (7), a positioning rod (8) is horizontally slidably inserted in the movable hole, and a locking component for locking the positioning rod (8) is provided on one of the support seats (3).

2. A strong twist core-spun yarn tensile strength detection device according to claim 1, characterized in that: The first clamping block (5) is provided with a plurality of sliding holes, and the mounting assembly comprises a plurality of sliding rods (9) respectively vertically slidably inserted into the plurality of sliding holes and a plurality of stoppers (10) respectively fixedly mounted on the lower ends of the plurality of sliding rods (9), and one end of the plurality of sliding rods (9) is fixedly connected to the clamping surface of the second clamping block (6).

3. A strong twist core-spun yarn tensile strength detection device according to claim 1, characterized in that: The adjustment assembly comprises two mounting blocks (11) respectively fixedly mounted on the two ends of the first clamping block (5), two bolts (12) respectively vertically rotatably mounted on the two mounting blocks (11), and two connecting blocks (13) respectively threadedly sleeved on the two bolts (12), wherein the two connecting blocks (13) are respectively fixedly connected to the two ends of the second clamping block (6).

4. A strong twist core-spun yarn tensile strength detection device according to claim 1, characterized in that: The locking assembly comprises a locking block (14) fixedly mounted on the side of the support seat (3) and a magnetic attraction component for adsorbing the positioning rod (8) on the locking block (14); a locking groove is provided on the side of the locking block (14), and one end of the positioning rod (8) can be inserted into the locking groove.

5. A strong twist core-spun yarn tensile strength detection device according to claim 4, characterized in that: The magnetic attraction component comprises an iron ring (15) fixedly sleeved on the positioning rod (8) and an annular magnetic sheet (16) fixedly mounted on the locking block (14); a limiting block (17) is fixedly mounted on one end of the positioning rod (8) away from the locking block (14); and the strip rod (7) is located between the iron ring (15) and the limiting block (17).

6. A strong twist core-spun yarn tensile strength detection device according to claim 1, characterized in that: One of the rectangular seats (2) is symmetrically provided with sliding holes, and the sliding assembly comprises two sliding rails (18) respectively inserted and slidably disposed in the two sliding holes, and the two sliding rails (18) are both horizontally fixedly mounted on the base (1).

7. A strong twist core-spun yarn tensile strength detection device according to claim 1, characterized in that: The stretching assembly comprises a stretching motor (19) fixedly mounted on a base (1), a stretching rod (20) fixedly mounted horizontally on the output end of the stretching motor (19), a bracket (21) fixedly mounted on the side of a rectangular seat (2), and a tension sensor (22) fixedly mounted on one end of the bracket (21); one end of the stretching rod (20) is fixedly connected to the output end of the tension sensor (22).

8. A device for detecting tensile strength of high-twist core-spun yarn according to claim 7, characterized in that: A positioning sleeve (23) is slidably sleeved on the stretching rod (20), and the positioning sleeve (23) is horizontally fixedly installed above the base (1) through a support frame (24). A scale (25) is horizontally fixedly installed on the support frame (24). An indicator rod (26) is fixedly installed at one end of the stretching rod (20), and one end of the indicator rod (26) points to the scale (25).

9. A device for detecting tensile strength of a high-twist core-spun yarn according to claim 1, characterized in that: Two semicircular first protective covers (27) are arranged between the two rectangular seats (2). The two first protective covers (27) are both mounted on the base (1) through elastic components. A fixing block (28) is fixedly mounted on the side of the first protective cover (27). A circular hole is horizontally opened on the fixing block (28). A round rod (29) is horizontally slidably mounted in the circular hole. A second protective cover (30) is fixedly mounted on one end of the round rod (29) through a rectangular block. One end of the second protective cover (30) is slidably inserted in the first protective cover (27). A pull rope (31) is fixedly mounted on one end of the second protective cover (30) close to the stretching component. One end of the pull rope (31) is fixedly connected to the support seat (3).

10. A device for detecting tensile strength of high-twist core-spun yarn according to claim 9, characterized in that: The elastic component comprises a support column (32) vertically fixedly mounted on the base (1), a rectangular rod (33) horizontally slidably mounted on the support column (32), a pull rod (34) fixedly mounted on one end of the rectangular rod (33), and a telescopic spring (35) sleeved on the rectangular rod (33), one end of the rectangular rod (33) being fixedly connected to the first protective cover (27), and both ends of the telescopic spring (35) being fixedly connected to the support column (32) and the first protective cover (27), respectively.

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