Cotton yarn strength detection device
The cotton yarn strength detection device, driven by air pressure and controlled by a pressure relief valve, uses the interlocking of clamping blocks and the matching of the detection teeth's slope surface to solve the problems of unstable cotton yarn clamping and manual intervention, achieving automated, non-destructive detection efficiency and accuracy improvement.
Patent Information
- Application Number
- CN202610497326.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-15
- Publication Date
- 2026-05-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing cotton yarn strength testing devices have poor clamping stability, which easily leads to stress concentration and slippage, resulting in inaccurate test results. Furthermore, they require manual intervention, making them inefficient.
By employing pneumatic drive and threshold timing control of the pressure relief valve, combined with the interlocking of the clamping block and the bevel of the detection teeth, the automatic clamping and stretching actions can be switched without damage. The stretching deformation is recorded by unidirectional locking of the detection pin and the tension spring.
It achieves stable, non-damaging clamping of cotton yarn, automated detection, improved detection efficiency and accuracy, and ensures the accuracy and quantifiable comparability of detection results.
Smart Images
Figure CN122042401A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of textile industrial production technology, and in particular relates to a cotton yarn strength testing device. Background Technology
[0002] As a basic raw material for textile production, the tensile strength of cotton yarn directly determines the forming quality, durability, and finished product qualification rate of textiles. In the cotton yarn production, processing, and quality control process, there is an urgent need for a special device that can efficiently and stably test the tensile strength of cotton yarn, so as to achieve rapid screening and quantitative judgment of cotton yarn quality and meet the quality inspection needs of large-scale production in the textile industry.
[0003] Current cotton yarn strength testing technology still has significant shortcomings: (1) Traditional testing devices often use simple clamping structures to clamp directly or tie the cotton yarn directly to achieve positioning. The clamping stability of simple clamping structures is poor, and the knotting method will cause stress concentration at the knotted part of the cotton yarn. The mechanical properties of this part are greatly weakened. During the stretching process, the knotted part is very easy to break first, and the true tensile strength of the cotton yarn body cannot be detected. At the same time, the cotton yarn is also prone to deviation and slippage, which ultimately leads to the distortion of the test data and the test results are not reliable. (2) Existing testing equipment generally suffers from chaotic action timing control. Clamping and stretching actions are difficult to switch automatically and orderly, requiring manual intervention and control. This not only results in low testing efficiency but also makes it easy to affect the consistency of test results due to operational errors. In addition, there is a lack of intuitive quantitative testing structure, making it inconvenient to read and compare test data. Summary of the Invention
[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a cotton yarn strength testing device. It employs a pneumatic drive and pressure relief valve threshold timing control, a clamping block with concave-convex interlocking to increase the clamping area, and a detection tooth slope surface combined with a detection pin and a tension spring for one-way locking. This allows for automatic switching between clamping and stretching processes, achieving stable, damage-free clamping of the cotton yarn. Simultaneously, it converts tensile deformation into a directly readable displacement, solving the problems of existing equipment requiring manual intervention, cotton yarn slippage or knotting leading to data distortion, and difficulty in quantifying and comparing test results. This effectively improves testing efficiency and strength determination accuracy.
[0005] The technical solution adopted in this invention is as follows: A cotton yarn strength testing device includes a testing box, a pneumatic cylinder fixedly installed on the outer top wall of the testing box, and a movable plate vertically slidably installed inside the testing box. A guide hole is provided on the side wall of the testing box, and the movable plate is vertically slidably installed within the guide hole. A placement cylinder is fixedly installed on the outer top wall of the testing box, and the outer edge of the top of the placement cylinder is fixedly and sealed to the pneumatic cylinder. A sealed pneumatic cavity is formed between the inner wall of the pneumatic cylinder and the outer wall of the placement cylinder. A circular hole is provided on the top wall of the pneumatic cylinder, and the circular hole is connected to the placement cylinder. A tension cylinder is fixedly installed on the inner top wall of the testing box, and a tension piston rod is movably and closely fitted inside the tension cylinder. The lower end of the tension piston rod is fixedly connected to the movable plate. The tension cylinder is connected to the pneumatic cylinder. A pressure relief valve is fixedly installed inside the pneumatic cylinder, and the tension cylinder is connected to the inside of the pneumatic cylinder through the pressure relief valve. A testing component is provided on the upper wall of the pneumatic cylinder.
[0006] As a preferred technical solution of this invention, an air pump is fixedly installed on the outer top wall of the air cylinder, and the air outlet of the air pump is connected to the inside of the air cylinder.
[0007] As a preferred technical solution of this invention, a clamping component 1 is fixedly installed on the inner wall of the detection box. Two sets of clamping components 1 are provided and arranged symmetrically. A clamping component 2 is fixedly installed on the upper wall of the movable plate. Two sets of clamping components 2 are provided and arranged symmetrically. The clamping component 1 is connected to the internal pipe of the air cylinder, and the clamping component 2 is connected to the internal pipe of the air cylinder.
[0008] As a preferred technical solution of this invention, the clamping assembly one includes a clamping cylinder fixedly disposed on the inner side wall of the detection box and a clamping piston rod movably and closely disposed within the clamping cylinder. A clamping block is fixedly disposed at the output end of the clamping piston rod. The clamping blocks are horizontally slidably disposed on the top wall of the detection box in opposite directions. A groove is provided inside one side of the clamping block, and a protrusion is provided on the other side of the clamping block. The protrusion and the groove are interlocked. The clamping assembly two has the same structure and connection method as the clamping assembly one. The clamping cylinder in the clamping assembly two is horizontally fixedly disposed on the upper wall of the moving plate. The clamping blocks in the clamping assembly two are horizontally slidably disposed on the upper wall of the moving plate in opposite directions. The clamping cylinder in the clamping assembly two is connected to the inside of the air cylinder through a connecting hose. The clamping cylinder in the clamping assembly one is connected to the air cylinder through a connecting pipe.
[0009] As a preferred technical solution of this invention, the detection component includes a guide column that is vertically slidably disposed through the top wall of the air cylinder, a connecting plate that is vertically fixedly disposed on the outer top wall of the air cylinder, and a detection column fixedly disposed on the upper end of the guide column. Detection teeth are fixedly disposed in a linear array on one side wall of the detection column, and the spacing between adjacent detection teeth is consistent. A detection pin is horizontally slidably disposed through the connecting plate. One end of the detection pin corresponds to a detection tooth. The upper wall of the detection tooth is sloped. A limit plate is fixedly disposed on the other end of the detection pin. A tension spring is fixedly connected between the limit plate and the connecting plate.
[0010] As a preferred technical solution of this invention, the top wall of the detection box is provided with a placement hole, and a conical hopper is fixedly provided on the inner circumference of the placement cylinder, with the funnel opening on the lower side of the conical hopper smoothly connected to the placement hole.
[0011] The beneficial effects of the present invention after adopting the above structure are as follows: (1) By adopting pneumatic drive combined with pressure relief valve threshold timing control, the pressure relief valve is automatically opened by gradually increasing the air pressure in the pneumatic cylinder, so that the clamping process is automatically switched to the stretching process after completion. There is no need for manual adjustment of the equipment operation process, and the automated and orderly execution of cotton yarn clamping and stretching detection actions is realized. This solves the technical problems of existing detection devices having asynchronous clamping and stretching actions, requiring manual intervention, low detection efficiency, and easy errors caused by human operation.
[0012] (2) By using the concave-convex interlocking of the clamping blocks to increase the clamping contact area, the traditional knotting and simple clamping methods are abandoned. The concave-convex interlocking structure forms a close-fitting and stable clamping of the cotton yarn, which improves the clamping fit accuracy and clamping firmness. It achieves non-damaging positioning clamping of both ends of the cotton yarn, and solves the technical problems of stress concentration and easy breakage of cotton yarn caused by knotting and simple clamping, and easy deviation and fall off, which in turn cause distortion of detection data.
[0013] (3) Based on the mechanical principle of the detection tooth slope surface cooperating with the detection pin and the tension spring for one-way locking, the cotton yarn tensile deformation is converted into the linear displacement of the detection column and the one-way limit is achieved to prevent the fall back. This realizes the intuitive quantitative recording of the cotton yarn tensile deformation and the rapid comparison of multiple samples, solving the technical problems of existing detection devices being unable to intuitively read strength data, inconvenient recording of detection results, and difficulty in efficiently comparing and judging multiple groups of samples. Attached Figure Description
[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof.
[0015] Figure 1 This is a three-dimensional view of the overall structure of a cotton yarn strength testing device proposed in this invention; Figure 2 This is a cross-sectional view of the internal structure of a cotton yarn strength testing device proposed in this invention; Figure 3 This is a cross-sectional view of the connection structure between the pneumatic cylinder and the tension cylinder proposed in this invention. Figure 4 This is a cross-sectional view of the overall structure of the detection component proposed in this invention; Figure 5 This is an exploded view of the overall structure of the clamping block proposed in this invention.
[0016] In the attached diagram: 1. Detection box; 2. Air cylinder; 3. Air pump; 4. Moving plate; 5. Detection assembly; 6. Tension cylinder; 7. Tension piston rod; 8. Connecting pipe; 9. Connecting hose; 10. Clamping assembly one; 11. Clamping block; 12. Clamping piston rod; 13. Clamping assembly two; 14. Guide post; 15. Guide hole; 16. Pressure relief valve; 17. Conical bucket; 18. Detection pin; 19. Tension spring; 20. Connecting plate; 21. Placement cylinder; 22. Placement hole; 23. Clamping cylinder; 24. Detection post; 25. Detection teeth. Detailed Implementation
[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0018] like Figures 1-5As shown, a cotton yarn strength testing device includes a testing box 1, a pneumatic cylinder 2 fixedly mounted on the outer top wall of the testing box 1, and a movable plate 4 vertically slidably mounted inside the testing box 1. A guide hole 15 is provided on the side wall of the testing box 1, and the movable plate 4 is vertically slidably mounted within the guide hole 15 to guide and limit the lifting and lowering movement of the movable plate 4, preventing it from swaying. A placement cylinder 21 is fixedly mounted on the outer top wall of the testing box 1. The outer edge of the top of the placement cylinder 21 is fixed and sealed to the pneumatic cylinder 2 to form a closed pneumatic containment space to prevent gas leakage. A sealed pneumatic cavity is formed between the inner wall of the pneumatic cylinder 2 and the outer wall of the placement cylinder 21 to store high-pressure driving gas, ensuring power supply for subsequent driving actions. A circular hole is provided on the top wall of the pneumatic cylinder 2, and the circular hole is connected to the placement cylinder 21 through it. The cotton yarn to be tested is smoothly inserted into the device to achieve feeding. A tension cylinder 6 is fixedly installed on the top wall of the testing box 1. A tension piston rod 7 is movably and closely fitted inside the tension cylinder 6. The lower end of the tension piston rod 7 is fixedly connected to the moving plate 4 so that the moving plate 4 can complete the lifting and lowering action by the extension and retraction of the tension piston rod 7, thereby applying tension force to the cotton yarn and realizing the core action of cotton yarn strength testing. The tension cylinder 6 is connected to the air pressure cylinder 2. A pressure relief valve 16 is fixedly installed inside the air pressure cylinder 2. The tension cylinder 6 is connected to the inside of the air pressure cylinder 2 through the pressure relief valve 16 so that the clamping process is automatically switched to the stretching process after completion, ensuring the orderly sequence of actions. A detection component 5 is set on the upper wall of the air pressure cylinder 2 to record the cotton yarn stretching deformation displacement in real time and realize the quantitative detection of strength.
[0019] An air pump 3 is fixedly installed on the outer top wall of the air pressure cylinder 2. The air outlet of the air pump 3 is connected to the inside of the air pressure cylinder 2 to continuously input high-pressure gas into the sealed air pressure chamber, providing stable power for the entire device.
[0020] The inner wall of the detection box 1 is fixedly provided with a clamping component 10. Two sets of clamping components 10 are provided and symmetrically arranged to clamp and fix the upper end of the cotton yarn strip. The upper wall of the moving plate 4 is fixedly provided with a clamping component 13. Two sets of clamping components 13 are provided and symmetrically arranged to clamp and fix the lower end of the cotton yarn strip. The clamping component 10 is connected to the internal pipe of the air cylinder 2, and the clamping component 13 is connected to the internal pipe of the air cylinder 2 to realize synchronous air supply and drive of the clamping components 10 and 13, ensuring the synchronicity of the clamping action.
[0021] The clamping assembly 10 includes a clamping cylinder 23 fixedly mounted on the inner wall of the detection chamber 1 and a clamping piston rod 12 movably and tightly fitted within the clamping cylinder 23. A clamping block 11 is fixedly mounted on the output end of the clamping piston rod 12, so that the clamping piston rod 12 drives the clamping block 11 to complete the opening and closing action. The clamping blocks 11 are horizontally slidably mounted on the top wall of the detection chamber 1 in opposite directions. One side of the clamping block 11 has a groove, and the other side has a protrusion. The protrusion and the groove interlock to improve the clamping accuracy and the contact area with the cotton yarn, preventing the cotton yarn from shifting in the clamping position. To prevent detachment, the clamping assembly 213 has the same structure and connection method as the clamping assembly 10. The clamping cylinder 23 in the clamping assembly 213 is horizontally fixed on the upper wall of the moving plate 4. The clamping block 11 in the clamping assembly 213 is horizontally slidably disposed on the upper wall of the moving plate 4, and applies tension to the cotton yarn as the moving plate 4 moves down synchronously. The clamping cylinder 23 in the clamping assembly 213 is connected to the inside of the air cylinder 2 through the connecting hose 9. The clamping cylinder 23 in the clamping assembly 10 is connected to the air cylinder 2 through the connecting pipe 8, so as to achieve stable delivery of high-pressure gas and ensure uniform clamping driving force.
[0022] The detection component 5 includes a guide post 14 vertically sliding through the top wall of the air cylinder 2, a connecting plate 20 vertically fixed to the outer top wall of the air cylinder 2, and a detection post 24 fixedly mounted on the upper end of the guide post 14 to convert the stretching deformation of the cotton yarn into linear displacement of the detection post 24. One side wall of the detection post 24 is linearly arrayed with detection teeth 25, with consistent spacing between adjacent detection teeth 25. A detection pin 18 is horizontally sliding through the connecting plate 20, with one end of the detection pin 18 corresponding to a detection tooth 25. The upper wall of the detection tooth 25 is sloped (e.g., ...). Figure 4 As shown in the figure, so that the detection pin 18 can smoothly pass over the detection tooth 25 and avoid movement jamming, the other end of the detection pin 18 is fixedly provided with a limit plate, and a tension spring 19 is fixedly connected between the limit plate and the connecting plate 20 to drive the detection pin 18 to reset and lock in time, prevent the detection column 24 from falling back, and ensure the accuracy of the detection data.
[0023] The top wall of the testing box 1 has a placement hole 22, and a conical hopper 17 is fixedly installed on the inner circumference of the placement cylinder 21. The funnel opening on the lower side of the conical hopper 17 is smoothly connected to the placement hole 22 to achieve smooth delivery of the object to be tested and avoid jamming.
[0024] In practical use, the cotton yarn strip to be tested is first placed inside the placement cylinder 21. The cotton yarn strip passes through the conical hopper 17 and the placement hole 22 into the testing box 1, so that the cotton yarn strip is located between the two clamping blocks 11 of the clamping component one 10. As the cotton yarn strip continues to fall, when the lower end of the cotton yarn strip enters between the two clamping blocks 11 of the clamping component two 13, the air pump 3 is started. The air pump 3 delivers external gas to the air pressure cylinder 2. At this time, the air pressure in the air pressure cylinder 2 has not reached the preset opening threshold of the pressure relief valve 16, so the pressure relief valve 16 remains closed. The gas in the air pressure cylinder 2 is introduced into the clamping cylinder 23 of the clamping component one 10 through the connecting pipe 8, and at the same time, it is introduced into the clamping cylinder 23 of the clamping component two 13 through the connecting hose 9, driving each clamping piston rod 12 to move until the clamping blocks 11 on both sides are fitted and connected, thereby clamping and fixing both ends of the cotton yarn strip. After the clamping block 11 is engaged, the stroke of the clamping piston rod 12 is limited and cannot continue to move, and the air pressure in the pneumatic cylinder 2 continues to rise. When the air pressure in the pneumatic cylinder 2 reaches the preset opening threshold of the pressure relief valve 16, the gas in the pneumatic cylinder 2 is introduced into the stretching cylinder 6 through the pressure relief valve 16. The stretching cylinder 6 drives the stretching piston rod 7 and the moving plate 4 to move downward to perform tensile strength testing on the cotton yarn. During the stretching process, the air pressure inside the pneumatic cylinder 2 continuously increases, and the tension on both ends of the cotton yarn increases synchronously. The guide post 14 and the detection post 24 move upward with the tension under their own weight. Since the upper wall of the detection tooth 25 is a sloping structure, when the detection post 24 moves upward, the detection pin 18 retracts away from the detection post 24 under the tension of the tension spring 19. When the detection pin 18 passes the corresponding detection tooth 25, the tension spring 19 drives the limiting plate and the detection pin 18 to reset and lock between two adjacent detection teeth 25, realizing the one-way limiting of the detection post 24. When the cotton yarn breaks, the upward stroke of the detection post 24 is recorded. After all the cotton yarn samples to be tested are tested, the upward stroke of the detection post corresponding to each sample is compared. The longer the stroke, the higher the tensile strength of the corresponding cotton yarn sample. After the test is completed, manually pull the test pin 18 to move the test pin 18 away from the test tooth 25. At this time, start the air pump 3 to make the airflow of the air pump 3 run in reverse, reduce the air pressure in the air cylinder 2, and complete the reset of the clamping piston rod 12 and the clamping block 11. At the same time, the reset of the stretching piston rod 7 and the moving plate 4 is completed.
Claims
1. A cotton yarn strength testing device, comprising a testing box (1), characterized in that: It also includes a pneumatic cylinder (2) fixedly installed on the outer top wall of the test box (1) and a movable plate (4) vertically slidably installed inside the test box (1). The side wall of the test box (1) is provided with a guide hole (15). The movable plate (4) is vertically slidably installed in the guide hole (15). The outer top wall of the test box (1) is fixedly provided with a placement cylinder (21). The outer edge of the top of the placement cylinder (21) is fixed and sealed to the pneumatic cylinder (2). The top wall of the pneumatic cylinder (2) is provided with a round hole, which is in communication with the placement cylinder (21). The test chamber (1) is connected to a tension cylinder (6) fixedly installed on the top wall. The tension cylinder (6) is fitted with a tension piston rod (7) that moves closely inside the tension cylinder (6). The lower end of the tension piston rod (7) is fixedly connected to the moving plate (4). The tension cylinder (6) is connected to the air pressure cylinder (2) through the air pressure cylinder (2). The air pressure cylinder (2) is fixedly installed with a pressure relief valve (16). The tension cylinder (6) is connected to the inside of the air pressure cylinder (2) through the pressure relief valve (16). The upper wall of the air pressure cylinder (2) is provided with a test assembly (5). The inner wall of the test box (1) is fixedly provided with a clamping component one (10), and there are two sets of clamping components one (10) arranged symmetrically. The upper wall of the moving plate (4) is fixedly provided with a clamping component two (13), and there are two sets of clamping components two (13) arranged symmetrically. The clamping component one (10) is connected to the internal pipe of the air cylinder (2), and the clamping component two (13) is connected to the internal pipe of the air cylinder (2).
2. The cotton yarn strength testing device according to claim 1, characterized in that: An air pump (3) is fixedly installed on the top wall of the air pressure cylinder (2), and the air outlet of the air pump (3) is connected to the inside of the air pressure cylinder (2).
3. The cotton yarn strength testing device according to claim 2, characterized in that: The clamping assembly one (10) includes a clamping cylinder (23) fixedly installed on the inner side wall of the detection box (1) and a clamping piston rod (12) movably and tightly installed in the clamping cylinder (23). The output end of the clamping piston rod (12) is fixedly provided with a clamping block (11). The clamping assembly two (13) has the same structure and connection method as the clamping assembly one (10). The clamping block (11) in the clamping assembly two (13) is horizontally slidably installed on the upper wall of the moving plate (4). The clamping cylinder (23) in the clamping assembly two (13) is horizontally fixedly installed on the upper wall of the moving plate (4). The clamping cylinder (23) in the clamping assembly two (13) is connected to the air cylinder (2) and fixedly connected with a connecting hose (9). The clamping cylinder (23) in the clamping assembly one (10) is connected to the air cylinder (2) and fixedly connected with a connecting pipe (8).
4. The cotton yarn strength testing device according to claim 3, characterized in that: The detection component (5) includes a guide post (14) that is vertically slidably disposed on the top wall of the air cylinder (2), a connecting plate (20) that is vertically fixedly disposed on the outer top wall of the air cylinder (2), and a detection post (24) that is fixedly disposed on the upper end of the guide post (14). The detection post (24) has detection teeth (25) fixedly disposed in a linear array on one side wall. The spacing between adjacent detection teeth (25) is consistent. The connecting plate (20) has a detection pin (18) that is horizontally slidably disposed inside. One end of the detection pin (18) corresponds to the detection tooth (25). The upper wall of the detection tooth (25) is sloped.
5. The cotton yarn strength testing device according to claim 4, characterized in that: The top wall of the test box (1) is provided with a placement hole (22), and a conical bucket (17) is fixedly provided on the inner circumference of the placement cylinder (21). The funnel opening on the lower side of the conical bucket (17) is smoothly connected to the placement hole (22).
6. The cotton yarn strength testing device according to claim 5, characterized in that: The output end of the clamping piston rod (12) is fixedly provided with a clamping block (11). One side of the clamping block (11) is provided with a groove, and the other side of the clamping block (11) is provided with a protrusion. The protrusion and the groove are interlocked.
7. The cotton yarn strength testing device according to claim 6, characterized in that: A limiting plate is fixedly provided at the other end of the detection pin (18), and a tension spring (19) is fixedly connected between the limiting plate and the connecting plate (20).