A polyester yarn twisting device

Abstract

The utility model discloses a kind of polyester yarn stranding devices, including stranding machine body, tension detector and the tension control assembly fixed on the surface of tension detector. Stranding machine body side is equipped with wire rack, and several tension detectors are sequentially arranged on the surface of wire rack, and each tension detector is equipped with angle sensor and force arm, and wire loop is equipped at the end of force arm, for detecting yarn running tension. Tension control assembly includes static guide pulley, crank arm, stop wheel, adjusting screw and spring, and the pressing force of crank arm is changed by adjusting screw, and the adjustable control of frictional damping between static guide pulley and stop wheel is realized. Control system automatically adjusts the rotation speed of stranding machine main motor according to angle sensor output signal, and forms multi-channel tension closed-loop control. The device can independently detect and dynamically adjust multiple polyester singles, make each yarn tension consistent, prevent broken yarn and uneven twist, significantly improve stranding quality and production stability.

Description

Technical Field

[0001] This utility model relates to the field of twisting machine technology, specifically a polyester yarn twisting device. Background Technology

[0002] Currently, in the processing of polyester yarn stranding, multiple single yarns are typically twisted and plyed according to a set twist to form a ply with a certain structural strength and elasticity. To ensure the uniformity of the stranded yarn and the stability of the finished product's strength, the tension of each strand must be strictly controlled before stranding to maintain consistency throughout the plying process. However, existing polyester yarn stranding equipment still has many shortcomings in tension detection and control.

[0003] Traditional stranding machines mostly employ a mechanical friction plate tension control structure, where resistance is provided at the yarn inlet section via pressure plates or friction wheels to achieve initial tension adjustment. This type of structure relies on a fixed clamping force and manual adjustment, making it impossible to provide independent feedback and precise control over the real-time tension changes of different strands. Because the yarn is affected by temperature, winding angle, and friction coefficient changes during high-speed operation, tension fluctuations are frequent, often resulting in some strands being too tight or too loose. This leads to problems such as uneven twist, loose structure, or yarn breakage after stranding.

[0004] Furthermore, while some high-end stranding equipment is equipped with tension detection sensors, most employ a centralized detection structure. This means that the average tension value of multiple strands of yarn is detected by a bus tension sensor, and then the control system performs uniform compensation. This method cannot independently adjust for tension differences in individual strands. Especially in the processing of fine denier polyester fibers, even slight differences in the force on a single strand can lead to twist deviation or uneven torque, which still cannot meet the requirements for high-precision stranding.

[0005] In view of this, we have studied and improved the existing problems and provided a polyester yarn twisting device to solve the current problems. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a polyester yarn stranding device, including a stranding machine body 100, a tension detector 200, and a tension control component 300 fixed on the surface of the tension detector 200. A wire frame 110 is provided on one side of the stranding machine body 100, and a plurality of tension detectors 200 are arranged sequentially on the surface of the wire frame 110, and each tension detector 200 works independently.

[0008] The tension detector 200 is used to detect the tension change of the yarn during the twisting process and outputs an electrical signal to the control system; the tension control component 300 is used to adjust the passing damping of the yarn to correct tension deviation. This device realizes a precision twisting control system that combines tension detection, alarm prompts, and automatic compensation through a dual control method of mechanical and electrical signals.

[0009] Specifically, this polyester yarn twisting device can process multiple strands of single yarn simultaneously, making the tension of each strand independently controllable, significantly improving the twisting uniformity and the stability of the finished product quality.

[0010] In a preferred example, the tension detector 200 has an angle sensor 210 on its surface, and a lever 220 is fixedly mounted on its shaft end. One end of the lever 220 has a loop 221 that is offset from the axis of the angle sensor 210.

[0011] When the yarn passes through the loop 221, the tension causes the drive arm 220 to deflect at a small angle. The angle sensor 210 converts the deflection angle into an electrical signal and outputs it to the control system.

[0012] Specifically, this structure can convert tension changes into highly sensitive electrical signals, enabling real-time monitoring and ensuring rapid and accurate tension detection response.

[0013] In a preferred example, the tension control assembly 300 includes a stationary guide wheel 310, a crank arm 320, and an adjusting screw 330 that is threadedly connected to the surface of the tension detector 200; The adjusting screw 330 passes through the crank arm 320 and a spring 331 is sleeved on its surface. The stationary guide wheel 310 is fixedly installed on the surface of the tension detector 200. The crank arm 320 can rotate around the rotating shaft and a stop wheel 321 is rotatably installed at its end.

[0014] A friction clamping zone is formed between the stationary guide wheel 310 and the abutment wheel 321 for the yarn to pass through, and the yarn is subjected to an adjustable damping force when it passes through.

[0015] Specifically, this structure achieves continuous adjustment of yarn tension through mechanical friction, and can fine-tune the yarn resistance according to process requirements, thereby keeping the tension within a stable range.

[0016] In a preferred example, the operator can change the force state of the crank arm 320 and adjust the clamping force between the stationary guide wheel 310 and the abutment wheel 321 by rotating the adjusting screw 330 to compress or release the spring 331.

[0017] When the clamping force increases, the frictional resistance of the yarn through this area increases, and the tension increases accordingly; when the clamping force decreases, the damping force decreases, and the tension decreases.

[0018] Specifically, this fine-tuning mechanism can achieve non-stop adjustment during equipment operation, making tension control more flexible and precise, and improving process adaptability and production continuity.

[0019] In a preferred example, the output of the angle sensor 210 is electrically connected to an alarm located inside the tension detector 200, which is used to issue an audible and visual alarm signal when the deflection angle of the lever arm 220 exceeds a preset limit.

[0020] Specifically, this structure can provide real-time early warning of abnormal tension conditions. Operators can adjust the yarn feeding speed or damping pressure in a timely manner based on the alarm information to prevent yarn breakage and loose strands.

[0021] In a preferred example, several tension detectors 200 are arranged side by side on the conductor frame 110, each tension detector 200 independently detects and outputs a signal, and the control system performs comprehensive analysis based on the data from each sensing channel.

[0022] When any yarn tension deviation is detected, the system automatically adjusts the speed of the variable frequency drive system inside the stranding machine body 100 to achieve dynamic compensation.

[0023] Specifically, this closed-loop control system can maintain consistent tension in all strands, ensuring twist synchronization and yarn stability during plying, and significantly improving automation level and product consistency.

[0024] In a preferred example, a replaceable connecting pin is provided between the lever arm 220 and the angle sensor 210 to change the length of the lever arm to accommodate polyester yarns of different specifications or diameters.

[0025] Specifically, the structure allows for adjustment of tension detection sensitivity and measurement range, enabling the device to be compatible with various yarn types and processing techniques, thus improving the equipment's versatility and economy.

[0026] The beneficial effects achieved by this utility model are as follows: 1. In this invention, by setting multiple independent tension detectors and tension control components on the conductor frame, real-time tension detection and independent adjustment of multi-strand polyester yarn are achieved. The angle sensor and lever arm work together to form a highly sensitive detection structure, which can convert minute tension changes into electrical signals and feed them back to the control system, thereby realizing dynamic monitoring and automatic compensation of tension. This avoids problems such as yarn breakage and loosening caused by uneven tension, and makes the twist of the polyester yarn more stable and consistent during the twisting process.

[0027] 2. In this invention, the clamping force between the stationary guide wheel and the abutment wheel is adjustable through a variable damping structure composed of an adjusting screw and a spring. This allows for fine-tuning of yarn resistance without stopping the machine, thereby precisely controlling yarn tension. This structure offers rapid response and precise adjustment. Combined with a frequency conversion closed-loop control system, it can automatically correct tension deviations, significantly improving the uniformity of polyester yarn twisting and production efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the surface structure of the conductor frame according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the tension detector and its surface tension control component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the tension control component structure according to an embodiment of the present invention.

[0029] Figure label: 100. Stranding machine; 110. Conductor frame; 200. Tension detector; 210. Angle sensor; 220. Lever arm; 221. Wire loop; 300. Tension control assembly; 310. Stationary guide wheel; 320. Crank arm; 321. Abutment wheel; 330. Adjusting screw; 331. Spring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0031] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0032] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a polyester yarn twisting device.

[0033] Combination Figures 1-4 As shown, the present invention provides a polyester yarn stranding device, including a stranding machine body 100, a tension detector 200, and a tension control component 300 fixed to the surface of the tension detector 200.

[0034] A conductor frame 110 is fixedly installed on one side of the stranding machine body 100. Several tension detectors 200 are arranged sequentially on the surface of the conductor frame 110. Each tension detector 200 is set independently to realize the tension distribution detection of multi-strand polyester yarn.

[0035] The tension detector 200 has an angle sensor 210 on its surface. A lever 220 is fixedly mounted on the shaft end of the angle sensor 210. One end of the lever 220 has a loop 221 offset from the axis of the angle sensor 210 to guide the yarn entry path. After passing through the loop 221, the yarn enters the stranding machine body 100 for subsequent stranding operations.

[0036] In this structure, the tension control component 300 is installed below the tension detector 200 and performs the function of micro-damping adjustment of the yarn. The tension control component 300 includes a stationary guide wheel 310, a crank arm 320, and an adjusting screw 330 threadedly connected to the surface of the tension detector 200. The adjusting screw 330 extends through the surface of the crank arm 320 and has a spring 331 sleeved on its surface. By rotating the adjusting screw 330, the spring 331 can be compressed or released, thereby changing the force state of the crank arm 320 and adjusting the clamping pressure between the stationary guide wheel 310 and the abutment wheel 321 on the crank arm 320.

[0037] The stationary guide wheel 310 is fixedly mounted on the surface of the tension detector 200. The crank arm 320 is rotatably connected to the tension detector 200 via a rotating shaft, and a stop wheel 321 is rotatably mounted at its front end. The stationary guide wheel 310 and the stop wheel 321 abut against each other to form a clamping friction zone for the yarn to pass through. When the yarn passes through, it forms a stable frictional contact with the surfaces of the two wheels to control the tension.

[0038] In this embodiment, both the stationary guide wheel 310 and the abutment wheel 321 are made of rubber, with circumferentially extending grooves on their surfaces, which effectively increases the contact area with the yarn and reduces slippage. By adjusting the clamping angle of the crank arm 320 and the clamping amount of the adjusting screw 330, the damping force of the yarn passing between the two wheels can be precisely controlled, thereby achieving the adaptation and adjustment of polyester yarns with different fineness.

[0039] The angle sensor 210 is used to detect the deflection angle of the lever arm 220 in real time. When the yarn is subjected to changes in force during operation, the loop 221 is subjected to tension, causing the lever arm 220 to deflect slightly. The angle sensor 210 converts this deflection angle into an electrical signal output. The output terminal of the angle sensor 210 is electrically connected to an alarm module located inside the tension detector 200. When the detected signal exceeds a preset threshold, the alarm module issues an audible and visual warning, prompting the operator to adjust the yarn feeding speed or damping state, thereby preventing yarn breakage or uneven tension.

[0040] In a preferred example, the tension detectors 200 are arranged in parallel along the conductor frame 110, and each detector 200 is equipped with an independent angle sensor 210 and a tension control component 300. The control system can simultaneously acquire and analyze the output signals of all angle sensors 210. When a tension deviation occurs in any detection channel, the control system automatically adjusts the speed of the variable frequency drive system inside the stranding machine body 100 to achieve automatic compensation. Through this closed-loop feedback control, the tension of all strands tends to be consistent, ensuring twist synchronization and tension stability during the stranding process.

[0041] In another embodiment, the stranding machine body 100 is equipped with a main drive motor and a frequency converter. The control system corrects the main motor speed in real time according to the detection signals of each channel to achieve dynamic tension balance. Through the linkage detection of the lever arm 220 and the angle sensor 210, the system can accurately reflect the tension change trend of a single strand of yarn, thereby achieving the purpose of uniform tension distribution.

[0042] Working principle and usage process of this utility model: Multiple polyester single yarns are introduced in parallel through the surface tension detector 200 and tension control component 300 of the conductor frame 110. Each yarn first passes through the contact area between the guide wheel 321 and the stationary guide wheel 310, and then enters the stranding machine body 100 through the wire loop 221 at the end of the lever arm 220.

[0043] When the yarn experiences tension changes during operation, the loop 221 is pulled, causing the power arm 220 to deflect slightly, which in turn drives the angle sensor 210 to rotate, thereby detecting the yarn tension in real time.

[0044] Angle sensor 210 converts the deflection angle of lever arm 220 into an electrical signal and outputs it to the control system. When the yarn tension exceeds the preset upper limit or falls below the lower limit, the sensor outputs an abnormal signal to the internal alarm module of the tension detector. The alarm then emits an audible and visual warning, prompting the operator to adjust the yarn feeding speed or damping state in a timely manner. This process enables real-time monitoring and early warning of abnormal yarn tension, preventing yarn breakage due to excessive local tension or loosening of the ply due to insufficient tension.

[0045] The tension control component 300, located below the tension detector 200, performs fine damping adjustment. As the yarn passes through the stationary guide wheel 310 and the abutment wheel 321, a clamping friction zone is formed. Rotating the adjusting screw 330 compresses or releases the spring 331, thereby changing the clamping force of the crank arm 320 and making the clamping gap between the stationary guide wheel 310 and the abutment wheel 321 adjustable. When the clamping force increases, the resistance of the yarn through this zone increases accordingly, and the tension increases; when the clamping force decreases, the yarn damping decreases, and the tension decreases. This fine-tuning mechanism enables dynamic adjustment during equipment operation, ensuring that the tension of each yarn remains within a set stable range.

[0046] Several tension detectors 200 are arranged in parallel along the guide frame 110, and each detector independently detects and adjusts the tension of a single yarn.

[0047] The control system collects and analyzes signals from all angle sensors 210. When a tension deviation is detected in any detection channel, the control system automatically adjusts the speed of the variable frequency drive system within the stranding machine body 100 to achieve automatic compensation. Simultaneously, by adjusting the main motor speed, it ensures that the tension of all strands is consistent, maintaining synchronized twist during stranding.

[0048] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A polyester yarn stranding device, characterized in that, The device includes a stranding machine body (100), a tension detector (200), and a tension control assembly (300) fixed to the surface of the tension detector (200). A wire frame (110) is fixedly installed on one side of the stranding machine body (100), and a plurality of tension detectors (200) are arranged sequentially on the surface of the wire frame (110). An angle sensor (210) is provided on the surface of the tension detector (200), and a lever arm (220) is fixedly installed on the shaft end of the angle sensor (210). One end of the lever arm (220) is offset from the shaft of the angle sensor (210). The tension control assembly (300) includes a stationary guide wheel (310), a crank arm (320), and an adjusting screw (330) threadedly connected to the surface of the tension detector (200). The adjusting screw (330) extends through the surface of the crank arm (320), and a spring (331) is sleeved on the surface of the adjusting screw (330). The stationary guide wheel (310) is fixed to the surface of the tension detector (200), the crank arm (320) is rotatably mounted on the surface of the tension detector (200), and a stop wheel (321) is rotatably mounted on the surface of the crank arm (320).

2. The polyester yarn stranding device according to claim 1, characterized in that, The surface of the stationary guide wheel (310) abuts against the surface of the abutment wheel (321) and is located in the same plane as the loop (221); the yarn passes through the abutment surface of the abutment wheel (321) and the stationary guide wheel (310) in sequence and passes through the loop (221), thereby entering the interior of the stranding machine body (100) for stranding.

3. The polyester yarn stranding device according to claim 1, characterized in that, The output of the angle sensor (210) is electrically connected to an alarm located inside the tension detector (200); when the lever arm (220) deflects beyond the set limit during operation, the alarm automatically issues a warning signal.

4. The polyester yarn stranding device according to claim 1, characterized in that, Both the stationary guide wheel (310) and the abutment wheel (321) are made of rubber wheels and have grooves extending circumferentially on their surfaces. The damping force when the yarn passes through can be changed by adjusting the clamping degree between the crank arm (320) and the stationary guide wheel (310).

5. The polyester yarn stranding device according to claim 1, characterized in that, The adjusting screw (330) is located at the bottom of the crank arm (320), and its threaded end is fixedly connected to the tension detector (200); by rotating the adjusting screw (330), the spring (331) can be compressed or released, thereby realizing the fine adjustment of the tension of the crank arm (320).

6. The polyester yarn stranding device according to claim 1, characterized in that, Several tension detectors (200) are arranged side by side on the conductor frame (110), and each tension detector (200) is independent of the others; Each tension detector (200) is equipped with an independent angle sensor (210) and tension control assembly (300).

7. The polyester yarn stranding device according to claim 1, characterized in that, The stranding machine body (100) is equipped with a frequency conversion drive system, which is used to automatically adjust the stranding speed according to the output signal of the tension detector (200); when a tension deviation is detected, the system automatically adjusts the speed of the main motor to achieve closed-loop control.

8. The polyester yarn stranding device according to claim 1, characterized in that, A replaceable connecting pin is provided between the lever arm (220) and the angle sensor (210) to change the effective length of the lever arm (220).

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