Textile yarn tensile property detection device with multi-section detection function

Abstract

The invention relates to the technical field of yarn tension detection, in particular to a textile yarn tensile property detection device with a multi-section detection function, which comprises a rack and a stretching frame, and a plurality of mounting frames are arranged on the rack; a detection mechanism is arranged on each mounting frame, a clamping assembly is arranged on each detection mechanism, and a detection unit is arranged on each clamping assembly; through the arrangement of the multiple mounting frames and the detection mechanisms, multi-section synchronous detection can be achieved on the same yarn, it is not needed to repeatedly cut and clamp the yarn in the prior art, the manual operation amount is greatly reduced, and the detection efficiency is remarkably improved. Every two adjacent detection mechanisms are distributed in a bilateral symmetry mode with the yarn as the symmetry axis and move synchronously and relatively, it is ensured that the yarn is evenly divided into a plurality of independent detection sections with the same length, the overall tensile property and uniformity of the yarn can be evaluated more comprehensively and accurately through comprehensive analysis of data of the multiple detection sections, and the yarn quality is improved. And local weak links can be found in time.

Description

Technical Field

[0001] The present invention relates to the technical field of yarn tension detection, and in particular to a textile yarn tensile performance detection device with a multi-segment detection function. Background Art

[0002] In yarn production, tensile strength testing is a core component of yarn quality control. It not only verifies yarn compliance with standards and customer requirements but also assesses yarn performance under complex stress conditions to ensure downstream fabrics meet their intended service life. Furthermore, accurate test data can be used to guide production process optimization, effectively reducing yarn breakage and scrap rates, improving production efficiency, and ensuring consistent finished product quality.

[0003] However, existing yarn tension testing technology has significant limitations. For example, traditional testing devices require manual repeated cutting and clamping of yarn samples, segment by segment. Comprehensive testing of the same roll of yarn requires frequent operation, resulting in high labor costs and a cumbersome process, making it difficult to meet the needs of industrial batch testing. In particular, for assessing yarn evenness, existing technology can only infer overall performance through segmented testing of discrete samples, and cannot achieve continuous and simultaneous monitoring of the entire length and multiple sections of a single yarn. This leads to "sampling bias" in evenness analysis and makes it difficult to accurately locate localized weak sections or areas of abnormal density.

[0004] Chinese patent authorization announcement No. CN119147370B discloses a yarn tensile strength testing device and testing process, including an equipment main body, a pay-off shaft, a top box and a bottom box. A middle hole is opened at the bottom of the top box, and the middle hole is connected to the interior of the bottom box. An inner slide rail is opened inside the equipment main body, and the inner side wall of the inner slide rail is fixedly connected to a drive motor. A threaded rod is provided at the output end of the drive motor, and a cross plate is threadedly sleeved on the outer wall of the threaded rod. Through the setting of the top box and the bottom box, when in use, the top box and the bottom box can repeatedly cut and load the same roll of yarn, so as to perform tension testing on the entire roll of yarn. Compared with the traditional manual cutting and loading method, this patent is more efficient and convenient, and improves the detection efficiency, but its core is still based on the traditional mode of segmented cutting and single-segment stretching. It is essentially a discrete sample test and cannot meet the uniformity detection requirements of multi-segment synchronous stretching of a single yarn. Summary of the Invention

[0005] To address the above issues, a textile yarn tensile performance testing device with multi-segment detection capabilities is provided. By providing multiple mounting frames and detection mechanisms, multi-segment simultaneous detection can be performed on the same yarn, eliminating the need for repeated yarn interception and clamping as in prior art. This significantly reduces manual labor and significantly improves detection efficiency. By arranging two adjacent detection mechanisms symmetrically about the yarn axis and moving them synchronously relative to each other, the yarn is evenly divided into multiple, independent detection segments of equal length. Comprehensive analysis of data from multiple detection segments enables a more comprehensive and accurate assessment of the yarn's overall tensile performance and uniformity, facilitating the timely identification of local weaknesses.

[0006] To solve the problems of the prior art, the present invention provides a textile yarn tensile performance testing device with a multi-segment detection function, comprising a frame and a stretching frame that can slide along the height direction of the frame, the yarn is located in a vertical state between the stretching frame and the bottom of the frame, and a plurality of mounting frames are arranged on the frame at equal intervals along the height direction; each mounting frame is provided with a detection mechanism that can slide in the horizontal direction, the detection mechanism is provided with a clamping assembly for fixing the yarn, and the clamping assembly is provided with a detection unit for detecting the yarn tension; in an initial state, the detection mechanisms on the two adjacent mounting frames are symmetrically distributed on both sides of the yarn with the yarn as the symmetry axis; when the stretching frame stretches the yarn to a preset length, the two adjacent detection mechanisms will move synchronously relative to each other in the horizontal direction, dividing the yarn into multiple detection segments, and the two ends of each detection segment are respectively clamped by the clamping assemblies on the two detection mechanisms, and the tension of each detection segment on the yarn is detected by the detection unit.

[0007] Preferably, two vertical slide rails are provided on the rack, the mounting frame spans between the two slide rails, and both ends of the mounting frame are respectively slidably engaged with the two slide rails, and a fixing piece is provided at one end of the mounting frame.

[0008] Preferably, the detection mechanism is provided with a slider that can slide along the length direction of the mounting frame, the slider is provided with a mounting block, the mounting block is provided with a mounting groove for accommodating the yarn, the clamping assembly can be slidably arranged on the slider and is located beside the mounting groove, and the mounting groove is provided with an avoidance groove that matches the sliding trajectory of the slider.

[0009] Preferably, each detection mechanism has two clamping assemblies, which are respectively located on the upper and lower sides of the mounting block, and both clamping assemblies are driven by electromagnetics.

[0010] Preferably, the detection unit is a strain sensor.

[0011] Preferably, a slide groove is provided on the mounting frame along its length direction, and a slider can be slidably provided on the slide groove. The mounting frame is also provided with a first screw rod that can rotate and extends along the length direction of the mounting frame. The slider is sleeved on the first screw rod and cooperates with its thread. A first rotary drive motor for driving it to rotate is provided on one end of the first screw rod.

[0012] Preferably, a distance sensor is provided on the slider.

[0013] Preferably, the frame is provided with a vertical plate, the vertical plate is provided with a track extending along the height direction of the frame, and the stretching frame can be slidably installed on the track.

[0014] Preferably, a second rotatable screw rod is provided on the vertical plate, the axis of the second screw rod extends along the height direction of the frame, the stretching frame is sleeved on the second screw rod and engaged with its thread, and a second rotary drive motor for driving the second screw rod is provided on the top of the vertical plate.

[0015] Preferably, a fixing roller for fixing the yarn end is provided on the stretching frame, and a tensioning mechanism is provided at the bottom of the frame, and the tensioning mechanism includes an elastic reset member connected to the yarn end.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can realize multi-segment synchronous detection on the same yarn through the arrangement of multiple mounting frames and detection mechanisms, without the need for repeated interception and clamping of the yarn as in the prior art, which greatly reduces the amount of manual operation and significantly improves the detection efficiency. By distributing two adjacent detection mechanisms symmetrically with the yarn as the axis of symmetry and moving them synchronously relative to each other, it is ensured that the yarn is evenly divided into multiple independent detection segments of equal length, so that the force conditions of each detection segment are consistent during the detection process, avoiding detection deviations caused by clamping or uneven force. The coordination of the clamping assembly and the detection unit can obtain the tension data of each detection segment. Through the comprehensive analysis of the data of multiple detection segments, the overall tensile properties and uniformity of the yarn can be evaluated more comprehensively and accurately, facilitating the timely discovery of local weak links.

[0018] 2. The present invention provides a slidably adjustable mounting frame and matching fixings on the frame. The device can flexibly adjust the spacing between adjacent mounting frames according to actual detection requirements, thereby changing the length of multiple detection sections on the entire yarn, effectively responding to yarn detection of different linear density, strength or specifications.

[0019] 3. The present invention's open mounting groove structure eliminates the need for precise matching of yarn shapes. Common shapes such as V-shaped and U-shaped can accommodate yarns with various cross-sections, such as round and flat. This expands the applicability of the device and avoids frequent replacement of clamps due to different yarn specifications. The pop-up fixing mechanism of the clamping component does not require complex alignment operations and can be quickly clamped by fitting into the mounting groove, reducing manual intervention and improving clamping efficiency.

[0020] 4. The elastic reset member of the tensioning mechanism of the present invention can be set as a spring or a clockwork spring, which can automatically compensate for the length change of the yarn during the stretching process without manual continuous adjustment of the tension, ensuring that the detection section is in a stable straight state before clamping. It is particularly suitable for the detection of yarns with different linear densities, avoiding clamping failure or data deviation due to tension fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of a textile yarn tensile performance testing device with multi-segment testing functions.

[0022] Figure 2 The present invention is a front view of a textile yarn tensile performance testing device with a multi-stage testing function in its initial state.

[0023] Figure 3 The present invention is a front view of a yarn stretching process in a textile yarn tensile performance testing device with a multi-stage testing function.

[0024] Figure 4 The present invention is a three-dimensional structural diagram of a frame, a mounting frame and a detection mechanism in a textile yarn tensile performance detection device with a multi-stage detection function.

[0025] Figure 5 The present invention is a three-dimensional structural diagram of a textile yarn tensile performance testing device with a multi-segment detection function when the yarn is stretched by multiple detection mechanisms.

[0026] Figure 6 The present invention is a three-dimensional structural diagram of a mounting frame and a detection mechanism in a textile yarn tensile performance detection device with a multi-stage detection function.

[0027] Figure 7 The present invention is an exploded view of a mounting frame and a testing mechanism in a textile yarn tensile property testing device with a multi-stage testing function.

[0028] Figure 8 yes Figure 1 Enlarged view of point A in the middle.

[0029] Figure 9 yes Figure 7 Enlarged view of point B in the middle.

[0030] Figure 10The present invention is a three-dimensional structural diagram of a neutral plate, a stretching frame and a tensioning mechanism of a textile yarn tensile performance testing device with a multi-stage testing function.

[0031] The numbers in the figure are:

[0032] 1. Frame; 11. Stretching frame; 111. Fixed roller; 12. Mounting frame; 121. Slide rail; 122. Fixing member; 123. Slide groove; 124. First screw rod; 125. First rotary drive motor; 13. Detection mechanism; 131. Clamping assembly; 132. Detection unit; 133. Slider; 1331. Mounting block; 13311. Mounting groove; 13312. Avoidance groove; 1332. Distance sensor; 14. Vertical plate; 141. Track; 142. Second screw rod; 143. Second rotary drive motor; 15. Tensioning mechanism; 151. Elastic reset member; 2. Yarn. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 7 and Figure 9 As shown: A textile yarn tensile performance testing device with a multi-stage detection function, comprising a frame 1 and a stretching frame 11 that can slide along the height direction of the frame 1, a yarn 2 is vertically positioned between the stretching frame 11 and the bottom of the frame 1, a plurality of mounting frames 12 are arranged on the frame 1 at equal intervals along the height direction; each mounting frame 12 is provided with a detection mechanism 13 that can slide along the horizontal direction, the detection mechanism 13 is provided with a clamping assembly 131 for fixing the yarn 2, and the clamping assembly 131 is provided with a device for detecting the yarn 2 tension detection unit 132; in the initial state, the detection mechanisms 13 on the two adjacent mounting frames 12 are symmetrically distributed on both sides of the yarn 2 with the yarn 2 as the symmetry axis; when the stretching frame 11 stretches the yarn 2 to a preset length, the two adjacent detection mechanisms 13 will move synchronously relative to each other in the horizontal direction, dividing the yarn 2 into multiple detection segments, and the two ends of each detection segment are clamped by the clamping components 131 on the two detection mechanisms 13, and the tension of each detection segment on the yarn 2 is detected by the detection unit 132.

[0035] When in use, the two ends of the yarn 2 are first respectively placed between the stretching frame 11 and the bottom of the frame 1, and the stretching frame 11 is slid along the height direction of the frame 1 to stretch the yarn 2 to a preset length and tension it. Since the two adjacent detection mechanisms 13 are initially symmetrically distributed on both sides of the yarn 2 with the yarn 2 as the axis of symmetry. When the yarn 2 is tensioned, the detection mechanisms 13 on the two adjacent mounting frames 12 will move synchronously relative to each other in the horizontal direction, gradually approaching the yarn 2, until the entire yarn 2 is divided into multiple independent detection segments. At this time, the clamping assembly 131 on the detection mechanism 13 will immediately clamp the contact part of the yarn 2, thereby fixing the two ends of each independent detection segment. Since the multiple mounting frames 12 are arranged at equal intervals along the height direction of the frame 1, the lengths of the various detection segments are also equal. Then, through further movement of the detection mechanism 13, a tensile force is applied to the yarn 2 located between the two detection mechanisms 13 until the yarn 2 is broken. During this process, the tension of the yarn 2 is detected by the detection unit 132 on the clamping assembly 131, and the tensile performance of the entire yarn 2 is evaluated by analyzing the tension data on each detection segment.

[0036] By setting up multiple mounting frames 12 and detection mechanisms 13, multi-segment synchronous detection can be achieved on the same yarn 2, without the need to repeatedly intercept and clamp the yarn 2 as in the prior art, which greatly reduces the amount of manual operation and significantly improves the detection efficiency. By arranging two adjacent detection mechanisms 13 symmetrically with the yarn 2 as the axis of symmetry and moving them synchronously relative to each other, it is ensured that the yarn 2 is evenly divided into multiple independent detection segments of equal length, so that the force conditions of each detection segment are consistent during the detection process, avoiding detection deviations caused by clamping or uneven force. The cooperation between the clamping assembly 131 and the detection unit 132 can obtain the tension data of each detection segment. Through the comprehensive analysis of the data of multiple detection segments, the overall tensile performance and uniformity of the yarn 2 can be more comprehensively and accurately evaluated, which facilitates the timely discovery of local weak links, provides a reliable basis for optimizing the textile production process and improving the quality stability of the yarn 2, and effectively reduces the yarn breakage and scrap rate.

[0037] like Figures 1 to 4 and Figure 8 As shown: two vertical slide rails 121 are provided on the rack 1, the mounting frame 12 spans between the two slide rails 121, and the two ends of the mounting frame 12 are respectively slidably matched with the two slide rails 121, and one end of the mounting frame 12 is provided with a fixing member 122.

[0038] The two slide rails 121 on the rack 1 provide a sliding guide structure for the mounting bracket 12. The mounting bracket 12 spans between the two slide rails 121, and its ends can slide up and down along the slide rails 121 through a sliding fit, thereby adjusting the spacing between the mounting brackets 12. The fixing member 122 provided at one end of the mounting bracket 12 can be in the form of a screw, pin, clip, or other various forms. When the spacing needs to be adjusted, the fixing member 122 is loosened, allowing the mounting bracket 12 to slide freely on the slide rail 121 to the target position; once in position, the fixing member 122 abuts, engages, or locks the surface of the slide rail 121, thereby securing the mounting bracket 12. For example, the screw-type fixing member 122 can be rotated so that the end of the screw presses against the slide rail 121, thereby securing the mounting bracket 12 using friction.

[0039] By arranging a slidably adjustable mounting frame 12 and a matching fixing member 122 on the frame 1, the device can flexibly adjust the spacing between adjacent mounting frames 12 according to actual detection requirements, thereby changing the length of multiple detection sections on the entire yarn 2, and effectively responding to the detection of yarns 2 with different linear densities, strengths or specifications. The various implementation methods of the fixing member 122 take into account the convenience of adjustment and the reliability of fixation, supporting both rapid coarse adjustment of the spacing and precise fine adjustment through the positioning hole, thereby improving the applicability of the device. In order to facilitate adjustment, scales can also be marked on the slide rail 121 to facilitate more precise adjustment of the mounting frame 12. The adjustability of the spacing between the mounting frames 12 avoids the limitations of traditional fixed spacing detection, enabling the same device to adapt to diverse detection standards or production requirements, and reducing equipment investment costs. At the same time, precise spacing adjustment ensures that the lengths of each detection section are consistent, providing a unified benchmark for the comparative analysis of multi-segment detection data, further improving the accuracy and reliability of the evaluation of the tensile properties of the yarn 2, and helping to refine and improve the quality control in the textile production process.

[0040] like Figures 4 to 7 and Figure 9 As shown: the detection mechanism 13 is provided with a slider 133 that can slide along the length direction of the mounting frame 12, the slider 133 is provided with a mounting block 1331, the mounting block 1331 is provided with a mounting groove 13311 for accommodating the yarn 2, the clamping assembly 131 is slidably set on the slider 133 and is located next to the mounting groove 13311, and the mounting groove 13311 is provided with an avoidance groove 13312 that matches the sliding trajectory of the slider 133.

[0041] The slider 133 of the detection mechanism 13 slides along the length of the mounting frame 12, driving the mounting block 1331 to move, so that the mounting groove 13311 on the mounting block 1331 contacts the yarn 2, and the yarn 2 is embedded in the mounting groove 13311. At this time, the clamping assembly 131 pops out from the slider 133 and approaches the mounting groove 13311, fixing the yarn 2 in the mounting groove 13311, thereby completing the clamping of the yarn 2.

[0042] The mounting groove 13311 is preferably configured as a V-shaped or U-shaped mounting groove 13311 that contacts the yarn 2. The V-shaped groove utilizes the self-centering property of the inclined surface to quickly guide the yarn 2 into the groove bottom, ensuring that the axis of the yarn 2 is aligned with the stretching direction of the detection mechanism 13; the U-shaped groove is limited by the side walls to prevent the yarn 2 from radially deviating.

[0043] The open structure of the mounting groove 13311 does not require precise matching of the shape of the yarn 2. Common shapes such as V-shape and U-shape are compatible with yarns 2 of various cross-sections such as round and flat, which expands the scope of application of the device and avoids frequent replacement of clamps due to different specifications of yarn 2; the pop-up fixing mechanism of the clamping component 131 does not require complicated alignment operations, and can be quickly clamped by fitting into the mounting groove 13311, reducing manual intervention and improving clamping efficiency; it provides stable testing conditions for evaluating the overall performance and uniformity of the yarn 2, effectively avoids data errors caused by clamping deviations, and provides a reliable basis for production process optimization.

[0044] like Figures 2 to 7 and Figure 9 As shown, each detection mechanism 13 has two clamping assemblies 131 , which are respectively located on the upper and lower sides of the mounting block 1331 , and both clamping assemblies 131 are driven by electromagnetics.

[0045] When slider 133 drives mounting block 1331 to the position of yarn 2, the clamping assemblies 131 on the upper and lower sides of mounting block 1331 are simultaneously activated by electromagnetic force, rapidly moving toward mounting slot 13311 and clamping yarn 2. The electromagnetic drive ensures a responsive clamping action and uniform, controllable clamping force. The symmetrical layout ensures that yarn 2 is subjected to balanced pressure during clamping, avoiding axial deflection or radial deviation caused by unilateral force, thereby ensuring that the force applied to yarn 2 within the detection section is strictly consistent with the stretching direction of stretching frame 11.

[0046] Since the detection mechanism 13 located in the middle will be shared by the upper and lower detection sections, if there is only one clamping component 131 and the detection unit 132 when detecting the yarn 2, there may be interference. Through the setting of the two clamping components 131, the stability of the yarn 2 fixation can be significantly improved, and the tension fluctuation caused by the clamping deviation during the detection process can be reduced, so that the tension data of each independent detection section can more truly reflect the tensile properties of the yarn 2 itself, and effectively improve the detection accuracy; through electromagnetic drive, the synchronous action of the clamping component 131 is uniformly coordinated by the back-end control system to ensure the coordination of multiple detection mechanisms 13 when separating the yarn 2, and avoid local stress concentration or interference of the yarn 2 due to asynchronous action.

[0047] like Figures 5 to 7 and Figure 9 As shown: the detection unit 132 is a strain sensor.

[0048] Detection unit 132 utilizes a strain gauge sensor. When clamping assembly 131 clamps yarn 2, the strain gauge sensor is subjected to force synchronously with clamping assembly 131. The tension generated by the yarn 2 stretching is transmitted through clamping assembly 131 to the elastic element of the strain gauge sensor, causing a slight deformation of the strain gauge on the surface of the elastic element, resulting in a change in the resistance value of the strain gauge. This resistance signal is converted into a voltage or current signal by a circuit and transmitted in real time to the back-end data processing system, accurately reflecting the tension changes in each detection section of the yarn 2 during the stretching process. The high-precision characteristics of the strain sensor can capture subtle tension fluctuations when the yarn 2 is stretched, and is particularly suitable for the detection of fine yarn or high-strength fiber, avoiding performance misjudgment due to insufficient sensor accuracy; the non-contact detection is coordinated with the upper and lower symmetrical layout of the clamping component 131 to ensure that the tension signal is directly derived from the force applied to the yarn 2 itself, reducing the interference caused by friction or vibration of the mechanical structure, and significantly reducing the repeatability error of the detection data; the real-time dynamic response capability can synchronously track the displacement of the stretching frame 11 and the peak tension at the moment of yarn 2 breaking, providing continuous and complete data support for analyzing key indicators such as the breaking strength and elongation of yarn 2.

[0049] like Figures 1 to 4 、 Figure 6 and Figure 7 As shown: a slide groove 123 is provided on the mounting frame 12 along its length direction, and a slider 133 is slidably provided on the slide groove 123. The mounting frame 12 is also provided with a first screw rod 124 that can rotate and extends along the length direction of the mounting frame 12. The slider 133 is sleeved on the first screw rod 124 and engaged with its thread. One end of the first screw rod 124 is provided with a first rotary drive motor 125 for driving it to rotate.

[0050] By starting the first rotary drive motor 125 on the mounting frame 12, the output shaft of the first rotary drive motor 125 drives the first screw 124 to rotate. At this point, the slider 133, which is threadedly engaged with the first screw 124, slides along the chute 123 of the mounting frame 12 under the action of the threaded drive. The chute 123 provides a precise linear guide for the slider 133, limiting its radial oscillation and ensuring smooth movement along the length of the mounting frame 12. The movement of the slider 133 drives the displacement of the detection mechanism 13, thereby bringing the detection mechanism 13 into contact with the yarn 2, achieving precise positioning and separation of the detection sections of the yarn 2. With further movement, the yarn 2 between the two detection mechanisms 13 is further stretched until it breaks, thus completing the detection.

[0051] Since the first rotary drive motor 125 is linked to the control system at the back end, the number of rotations of the first screw rod 124 can be automatically calculated and executed according to the preset detection section length or yarn 2 specifications, thereby achieving stepless adjustment of the spacing of the detection mechanism 13 without manual intervention, significantly improving the efficiency of detection preparation, and is particularly suitable for batch detection or continuous detection scenarios of production lines. It provides a stable mechanical foundation for the clamping assembly 131 to accurately clamp the yarn 2, indirectly improving the repeatability accuracy of tension detection. And because the first screw rod 124 has a self-locking characteristic during transmission, the position of the detection mechanism 13 can remain stable during the stretching process, avoiding the low efficiency and insufficient precision of traditional manual adjustment devices.

[0052] like Figures 2 to 6 As shown: a distance sensor 1332 is provided on the slider 133 .

[0053] Slider 133 is integrated with a distance sensor 1332, which emits laser, infrared, or ultrasonic signals to detect the distance between slider 133 and the end point of mounting bracket 12 or the adjacent detection mechanism 13 in real time, and feeds this position data back to the back-end control system. After receiving the preset detection segment length parameters, the control system, combined with the real-time feedback from distance sensor 1332, accurately calculates the number of rotations of first screw rod 124 and drives slider 133 to the target position.

[0054] Avoid positioning deviation caused by transmission error or mechanical wear of the first screw rod 124, so that the length of each detection section strictly conforms to the set value, and ensures the comparability of multi-segment detection data; through the closed-loop control of the distance sensor 1332 and the back-end control system, the device can automatically adapt to different detection requirements without manual measurement or manual calibration, shortening the preparation time for detection; the non-contact detection characteristics of the distance sensor 1332 avoid the collision loss that may be caused by the mechanical limit switch, improve the service life of the detection mechanism 13, and further enhance the detection function and intelligence level of the device.

[0055] like Figures 1 to 3 and Figure 10 As shown, a vertical plate 14 is provided on the frame 1 , and a track 141 extending along the height direction of the frame 1 is provided on the vertical plate 14 , and the stretching frame 11 can be slidably installed on the track 141 .

[0056] The vertical plate 14 on the frame 1 provides rigid vertical support for the stretching frame 11. A track 141 on its surface extends along the height of the frame 1, forming a sliding guide structure for the stretching frame 11. The stretching frame 11 preferably cooperates with the track 141 via a pulley, slider 133, or guide rail pair, allowing it to slide up and down along the track 141. When yarn 2 needs to be tested, the stretching frame 11 slides upward from its initial position, such as at the bottom of the frame 1, gradually tensioning the yarn 2. The linear guidance provided by the track 141 ensures that the stretching frame 11 maintains a vertical position during movement, preventing uneven force on the yarn 2 due to tilting, thereby ensuring that the yarn 2 evenly bears the tensile load in the vertical direction.

[0057] like Figures 1 to 3 and Figure 10 As shown: a rotatable second screw rod 142 is provided on the vertical plate 14, the axis of the second screw rod 142 extends along the height direction of the frame 1, the stretching frame 11 is sleeved on the second screw rod 142 and engaged with its thread, and a second rotary drive motor 143 for driving the second screw rod 142 is provided on the top of the vertical plate 14.

[0058] By activating the second rotary drive motor 143 on the vertical plate 14, the output shaft of the second rotary drive motor 143 drives the rotation of the second screw rod 142, causing the stretching frame 11, which is threadedly engaged with the second screw rod 142, to perform linear lifting and lowering motion along the track 141 of the vertical plate 14 under the action of the threaded drive. The precise pitch of the second screw rod 142, combined with the precise control of the second rotary drive motor 143, improves the displacement accuracy of the stretching frame 11, ensuring that the elongation of the yarn 2 during the stretching process is precisely controlled.

[0059] The high rigidity load capacity provided by the second screw rod 142 transmission enables the stretching frame 11 to stably withstand tension, which is suitable for the detection of high-strength industrial yarn 2. At the same time, it reduces the elastic deformation caused by load changes, avoids the response delay of manual operation, and improves the accuracy of data collection; the self-locking feature of the second screw rod 142 transmission can prevent the stretching frame 11 from accidentally slipping when the second rotating motor is powered off, thereby ensuring the safety of operators and equipment, especially during long-term continuous detection, reducing the risk of detection interruption due to equipment failure, extending the service life of the equipment, and reducing the cost of enterprise detection.

[0060] like Figures 1 to 3 and Figure 10 As shown, a fixed roller 111 for fixing the end of the yarn 2 is provided on the stretching frame 11, and a tensioning mechanism 15 is provided at the bottom of the frame 1. The tensioning mechanism 15 includes an elastic reset member 151 connected to the end of the yarn 2.

[0061] During use, one end of the yarn 2 is fixed to the fixed roller 111 of the stretching frame 11, and the other end is tensioned by the elastic reset member 151 of the tensioning mechanism 15 at the bottom of the frame 1. The elastic reset member 151 provides initial tension, so that the yarn 2 is naturally straightened and in a pre-tensioned state. When the stretching frame 11 slides up and down along the track 141 of the vertical plate 14, the yarn 2 is longitudinally stretched by the fixed roller 111. The elastic reset member 151 deforms as the yarn 2 stretches, continuously providing reverse tension to maintain the yarn 2 in a taut state, avoiding deviations in the positioning of the detection section due to relaxation. After the slider 133 of the detection mechanism 13 drives the mounting block 1331 to move to the target position, the clamping assembly 131 clamps the yarn 2 to form an independent detection section. At this time, the coordinated action of the elastic reset member 151 and the stretching frame 11 ensures that each detection section always bears a uniform load during the stretching process until the yarn 2 breaks.

[0062] The elastic reset member 151 of the tensioning mechanism 15 can be set as a spring or a clockwork, etc., which can automatically compensate for the length change of the yarn 2 during the stretching process without manual continuous adjustment of the tension, ensuring that the detection section is in a stable straight state before clamping. It is particularly suitable for the detection of yarns 2 with different linear densities, avoiding clamping failure or data deviation due to tension fluctuations.

[0063] The cooperation between the fixed roller 111 and the tensioning mechanism 15 eliminates the need for precise pre-stretching during the installation process of the yarn 2. It only needs to be fixed at both ends to automatically straighten it through the elastic reset member 151, shortening the clamping time, while reducing the dependence on the operator's experience and improving the standardization of the inspection process.

[0064] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A textile yarn tensile performance testing device with a multi-stage detection function, comprising a frame and a stretching frame that can slide along the height direction of the frame, wherein the yarn is vertically located between the stretching frame and the bottom of the frame, characterized in that: A plurality of mounting brackets are arranged on the rack at equal intervals along the height direction; Each mounting frame is provided with a detection mechanism that can slide in the horizontal direction, the detection mechanism is provided with a clamping assembly for fixing the yarn, and the clamping assembly is provided with a detection unit for detecting the yarn tension; In the initial state, the detection mechanisms on the two adjacent mounting frames are symmetrically distributed on both sides of the yarn with the yarn as the symmetry axis; When the stretching frame stretches the yarn to a preset length, the two adjacent detection mechanisms will move synchronously relative to each other in the horizontal direction, dividing the yarn into multiple detection segments, and the two ends of each detection segment are clamped by the clamping components on the two detection mechanisms respectively, and the tension of each detection segment on the yarn is detected by the detection unit.

2. A textile yarn tensile performance testing device with multi-stage detection function according to claim 1, characterized in that: The rack is provided with two vertical slide rails, the mounting frame spans between the two slide rails, and both ends of the mounting frame are respectively slidably matched with the two slide rails, and one end of the mounting frame is provided with a fixing piece.

3. The textile yarn tensile performance testing device with multi-stage detection function according to claim 2, characterized in that: The detection mechanism is provided with a slider that can slide along the length direction of the mounting frame, the slider is provided with a mounting block, the mounting block is provided with a mounting groove for accommodating the yarn, the clamping assembly can be slidably arranged on the slider and is located beside the mounting groove, and the mounting groove is provided with an avoidance groove that matches the sliding trajectory of the slider.

4. A textile yarn tensile properties testing device with multi-stage detection function according to claim 3, characterized in that: Each detection mechanism has two clamping assemblies, which are respectively located on the upper and lower sides of the mounting block, and both clamping assemblies are driven by electromagnetics.

5. The textile yarn tensile performance testing device with multi-stage detection function according to claim 1, characterized in that: The detection unit is a strain sensor.

6. The textile yarn tensile performance testing device with multi-stage detection function according to claim 3, characterized in that: The mounting frame is provided with a slide groove along its length direction, and the slider can be slidably set on the slide groove. The mounting frame is also provided with a first screw rod that can rotate and extends along the length direction of the mounting frame. The slider is sleeved on the first screw rod and cooperates with its thread. One end of the first screw rod is provided with a first rotary drive motor for driving it to rotate.

7. The textile yarn tensile performance testing device with multi-stage detection function according to claim 6, characterized in that: A distance sensor is provided on the slider.

8. The textile yarn tensile performance testing device with multi-stage detection function according to claim 1, characterized in that: The frame is provided with a vertical plate, the vertical plate is provided with a track extending along the height direction of the frame, and the stretching frame can be slidably installed on the track.

9. The textile yarn tensile performance testing device with multi-stage detection function according to claim 8, characterized in that: A second rotatable screw rod is provided on the vertical plate, and the axis of the second screw rod extends along the height direction of the frame. The stretching frame is sleeved on the second screw rod and cooperates with its thread. A second rotary drive motor for driving the second screw rod is provided on the top of the vertical plate.

10. The textile yarn tensile performance testing device with multi-stage detection function according to claim 1, characterized in that: A fixed roller for fixing the yarn end is provided on the stretching frame, and a tensioning mechanism is provided at the bottom of the frame. The tensioning mechanism includes an elastic reset member connected with the yarn end.

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