A mechanism for detecting broken slivers in a sliver doubling process

Abstract

The application relates to the technical field of fabric generation processing, more specifically, it relates to a broken sliver detection mechanism in a cotton sliver doubling process, which comprises a mounting unit and a detection unit, the mounting unit comprises a rack and a guide piece, the guide piece is arranged on the rack, the guide piece is a hollow pipe piece with both ends being communicated, a feeding port of the guide piece is close to a feeding barrel, a discharging port of the guide piece is close to a drawing frame, a roller shaft is arranged in the guide piece, the roller shaft is rotationally connected with the guide piece, the detection unit is arranged on the guide piece and is used for detecting whether the cotton sliver running in the guide piece is broken, the optical fiber sensor arranged on the guide piece can realize real-time detection on whether the cotton sliver is broken, so that an operator can take measures in time, and production problems caused by the broken sliver can be prevented.

Description

Technical Field

[0001] This invention relates to the technical field of fabric production and processing, and more specifically, to a detection mechanism for sliver breakage during the sliver doubling process. Background Technology

[0002] The yarn production process refers to the process of processing raw materials such as cotton, wool, and synthetic fibers into yarn. Yarn is an important raw material in the textile industry and is widely used in clothing, home textiles, and industrial fields. The conversion process from cotton sliver to yarn is a key step in the spinning process. The traditional conversion process involves multiple steps, including pre-treatment of the cotton sliver, fiber separation, and refining. In the pre-treatment process, multiple cotton slivers need to be combined into one using a drawing frame. During this process, sliver breakage can occur. Sliver breakage refers to the breakage that occurs during drawing. Sliver breakage leads to a decrease in yarn strength and affects the quality of the fabric. The main causes of sliver breakage are: raw material fiber strength is too low, roller gap of the drawing frame is too small, draft ratio of the drawing frame is too high, and the automatic stop device of the drawing frame is insensitive.

[0003] To address the aforementioned yarn breakage issue, the mainstream detection methods currently used are photoelectric detection and mechanical detection. Photoelectric detection, according to announcement number CN113668105B, describes a method for detecting yarn breakage and a yarn-suction component with breakage detection function. This existing technology determines whether fibers are sucked into the suction hole by changing the amplitude of the output signal of the detection element. If fibers are sucked in, the capacitance value formed by the capacitor plate will increase; the greater the amount of fiber sucked in, the greater the increase in capacitance. The output of the photoelectric device will also change due to the light from the light-emitting device being partially blocked by the sucked-in fibers. When fibers are sucked into the suction hole, not only does the amplitude of the output signal of the detection element change significantly compared to when no fibers are sucked in, but the output signal of the detection element also exhibits greater fluctuations when sliver fibers are sucked in compared to when no sliver fibers are sucked in.

[0004] The mechanical inspection method is based on a drawing frame disclosed in announcement number CN110284224A. In this drawing frame, multiple cotton slivers enter the working platform of the drawing frame from the feeding mechanism. When passing through the feeding mechanism, the cotton slivers are still in a separate state. Then, each cotton sliver passes through a corresponding detection mechanism. The wire breakage sensor of the detection mechanism detects whether there is a broken cotton sliver. This eliminates the need for workers to check each sliver individually, saves labor, and is more accurate. After that, it is passed between two rollers for drawing.

[0005] Broken yarn detection technology is of great significance in yarn production, as it can effectively improve yarn quality and reduce fabric quality problems.

[0006] The detection accuracy of the aforementioned existing technologies needs further optimization during use. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a simple and highly accurate detection mechanism for detecting sliver breakage during the sliver spinning process.

[0008] A sliver breakage detection mechanism for cotton slivers during the doubling process includes an installation unit and a detection unit.

[0009] The mounting unit includes a frame and a guide component. The guide component is a hollow tube connected at both ends and is mounted on the frame. The inlet port of the guide component is close to the feeding hopper, and the outlet port is close to the drawing frame. A roller is installed inside the guide component, and the roller is rotatably connected to the guide component.

[0010] The detection unit, installed on the guide, is used to detect whether the cotton strip running inside the guide has broken.

[0011] The present invention is further configured such that: the guide member is hollow, and an opening communicating with its inner cavity is provided on the guide member;

[0012] The detection unit includes sensing components, signal processing components, and a central integration component.

[0013] The sensing component is coupled to the signal processing component, and the signal processing component is coupled to the central integration component.

[0014] The sensing component enters the guide through the guide from the discharge port and connects to the guide's inlet port.

[0015] The drawing frame and the central integrated component are coupled.

[0016] When the tampon breaks, the tampon comes into contact with the sensing component, which transmits a signal to the signal processing component. The signal processing component converts the analog signal into a digital signal, and the central integration component outputs a command to stop the machine.

[0017] The present invention is further configured such that: the sensing component includes an optical fiber, the guide is transparent, the guide has a support platform for supporting the optical fiber, the top of the support platform has a positioning groove for accommodating the optical fiber, and the top of the support platform has a plurality of ring portions, the ring portions and the positioning groove are connected, so that the optical fiber is encased in the positioning groove by the ring portions.

[0018] The present invention is further configured such that: a feeding assembly is provided on the frame, the feeding assembly being used to feed the cotton sliver from the inlet port of the guide to the outlet port of the guide.

[0019] The feeding assembly includes a guide unit and a hanger arranged along the shape of the guide member. The hanger is placed on the guide unit and movably connected to the guide unit. One end of the hanger is provided with a hook for connecting cotton strips. The hook has two symmetrically arranged openings so that the cotton strip can be inserted through one opening and then wrapped around to the other opening and out.

[0020] The present invention is further configured such that the hook portion and the body of the hanging piece are hinged together.

[0021] The invention is further configured such that: the pendant is provided with a movable part connected to the guide unit, the movable part includes two symmetrically arranged axles, the guide unit passes between the two axles, and the axles rotate freely when they move relative to the guide unit.

[0022] The invention is further configured such that: the frame includes a support rod and a crossbar, the crossbar is connected to the top of the support rod, and the guide portion has a connecting portion through which the crossbar passes.

[0023] Compared with the shortcomings of the prior art, the beneficial effects of the present invention are as follows:

[0024] By using fiber optic sensors installed on the guide components, it is possible to detect in real time whether the cotton sliver is broken, allowing operators to take timely measures to prevent production problems caused by sliver breakage.

[0025] Fiber optic sensors are highly sensitive and can accurately detect changes in the condition of cotton slivers, including minute breaks or disconnections. Once a break is detected, the system can immediately stop, preventing further processing of the damaged sliver and reducing production losses. By processing the sensor signals through signal processing and central integration components, automated control of the production equipment can be achieved, improving the automation level of the production line.

[0026] The design employs a double-opening guide structure, as well as a hanging and hook design, which ensures the installation position and stability of the fiber optic sensor, thereby improving the reliability and stability of the detection. Attached Figure Description

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

[0028] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0029] Figure 3 A schematic diagram of the pendant of this invention.

[0030] Frame 1, guide 2, opening 20, notch 201, roller 3, optical fiber 41, light source 42, photodetector 43, optical splitter 44, support platform 21, ring part 22, guide unit 5, hanger 6, hook part 61, opening 60, cotton strip 7. Detailed Implementation

[0031] Reference Figures 1 to 3 The embodiments of the present invention will be further described below.

[0032] The specific structure of this embodiment includes an installation unit and a detection unit.

[0033] The installation unit includes a frame 1 and a guide 2. The frame 1 has a support rod connected to the ground and a crossbar connected to the top of the support rod. The guide 2 has a connecting part through which the crossbar passes, and a fastening bolt that locks the guide 2 to the crossbar in the connecting part.

[0034] The guide component 2 is a hollow tube with its two ends connected to each other. The feed port 101 of the guide component 2 is close to the feeding barrel, and the discharge port 102 of the guide component 2 is close to the drawing frame. The guide component 2 is hollow, and an opening 20 communicating with its inner cavity is provided on the ridge of the guide component 2. A notch 201 is provided on the guide component 2 near the feed port.

[0035] The cotton sliver 7 output from the feed hopper passes through the body of the guide 2 and comes into contact with the drawing frame, where it is squeezed and combined. Several rollers 3 are installed inside the guide 2. Each roller 3 includes a shaft and rollers rotatably connected to the shaft. The cotton sliver 7 contacts the outer wall of the rollers. The rollers 3 serve to support the cotton sliver 7. When the drawing frame pulls the cotton sliver 7, the cotton sliver 7 rotates along with the rollers 3.

[0036] The detection unit is used to detect whether the sliver 7 running within the guide 2 is disconnected. The detection unit includes a sensing component, a signal processing component, and a central integration component. The sensing component and the signal processing component are coupled, the signal processing component and the central integration component are coupled, and the drawing frame and the central integration component are coupled.

[0037] The sensing components include an optical fiber 41, a light source 42, and a photodetector 43. The optical fiber 41 extends from the feed port of the guide member 2, penetrates the body of the guide member 2, and then extends from the outlet end of the guide member 2. The light source 42 and the photodetector 43 are connected to the two ends of the optical fiber 41, respectively. The optical fiber 41 is a sensitive element that can sense the external conditions. The light source 42 is connected to an optical splitter 44 and then to the optical fiber 41, thereby sending one light source 42 to multiple optical fibers 41, which meets the purpose of processing multiple sets of drawing frames in the workshop.

[0038] When the cotton sliver 7 breaks, the cotton sliver 7 comes into contact with the optical fiber 41, and the optical fiber 41 transmits the signal to the signal processing unit. The signal processing unit converts the analog signal into a digital signal, which is then output by the central integration unit to the drawing frame to execute a stop command, thus facilitating manual maintenance.

[0039] The guide 2 is a transparent PVC pipe. A support platform 44 for supporting the optical fiber 41 is formed on the bottom inner wall of the guide 2. A positioning groove for accommodating the optical fiber 41 is opened on the top of the support platform 44. Several ring parts 22 are provided on the top of the support platform 44. The ring parts 22 are connected to the positioning groove so that the optical fiber 41 is encased in the positioning groove by the ring parts 22.

[0040] The frame 1 is equipped with a feeding assembly, which is used to feed the cotton sliver 7 from the feed port of the guide 2 to the discharge port of the guide 2.

[0041] The feeding assembly includes a guide unit 5 arranged along the outline of the guide member 2 along its length, and a hanger 6 installed on the guide unit 5 and movably connected to the guide unit 5. The guide unit 5 is a hollow thin tube. The two ends of the thin tube are bent and welded to the upper edge of the feed port and discharge port of the guide member 2, so that the thin tube is lifted away from the guide member 2, and a gap is formed between the thin tube and the guide member 2 for the hanger 6 to move.

[0042] The pendant 6 is provided with a movable part that connects to the guide unit 5. The movable part includes two symmetrically arranged axles 8. The pendant 6 has a movable hole 601 through which the guide unit 5 passes. The guide unit 5 passes between the two axles 8 and then through the movable hole 601. When the axles 8 move relative to the guide unit 5, they can rotate freely. The axle arrangement can reduce wear and friction during the displacement of the pendant 6 relative to the guide unit 5, thereby facilitating the movement of the pendant 6 with the cotton strip 7 on the guide unit 5.

[0043] A hook portion 61 for connecting cotton strips 7 is provided at one end of the hanger 6, and the hook portion 61 is hinged to the body of the hanger 6. Two symmetrically arranged openings 60 are provided on the hook portion 61. In use, the cotton strip 7 is first inserted into the notch 201 from the feed port, and then the hanger 6 is moved above the notch 201. The cotton strip 7 is inserted through one of the openings 60 and then passes through the other opening 60. The body of the hanger 6 moves along the opening 20 on the guide member 2, so that the cotton strip 7 enters from its feed port and then passes through its discharge port. After the cotton strip 7 passes through the discharge port, the end of the cotton strip 7 is removed from the opening 60 on the hook portion 61 and then sent into the drawing frame.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection mechanism for sliver breakage during the doubling process of cotton slivers, characterized in that: Includes installation unit and testing unit, The mounting unit includes a frame (1) and a guide (2). The guide (2) is mounted on the frame (1) and is a hollow tube with both ends connected. The feed port (101) of the guide (2) is close to the feeding hopper, and the discharge port (102) of the guide (2) is close to the drawing frame. The detection unit, installed on the guide (2), is used to detect whether the cotton strip (7) running inside the guide (2) is broken. The guide (2) is hollow and has an opening (20) that communicates with its inner cavity. The detection unit includes sensing components, signal processing components, and a central integration component. The sensing component is coupled to the signal processing component, and the signal processing component is coupled to the central integration component. The sensing component enters the guide (2) through the guide (2) from the discharge port and connects to the feed port of the guide (2). The drawing frame is coupled to the central integrated unit. When the sliver (7) is disconnected, the sliver (7) contacts the sensing component, which transmits a signal to the signal processing component. The signal processing component converts the analog signal into a digital signal, and the central integrated unit outputs a command to stop the machine. The sensing component includes an optical fiber (41). The guide (2) is transparent and has a support platform (44) inside for supporting the optical fiber (41). The top of the support platform (44) has a positioning groove for accommodating the optical fiber (41). The top of the support platform (44) has several annular portions (22) that are connected to the positioning groove so that the optical fiber (41) is encased in the positioning groove by the annular portions (22). The frame (1) is provided with a feeding assembly, which is used to feed the cotton sliver (7) from the feed port of the guide (2) to the discharge port of the guide (2). The feeding assembly includes a guide unit (5) and a hanger (6) arranged along the shape of the guide member (2). The hanger (6) is placed on the guide unit (5) and movably connected to the guide unit (5). One end of the hanger (6) is provided with a hook for connecting the cotton strip (7). (61) Two symmetrically arranged openings (60) are provided on the hook part (61) so that the cotton strip (7) can be inserted through one of the openings (60) and then pass through the other opening (60). The frame (1) includes a support rod and a crossbar. The crossbar is connected to the top of the support rod. The guide has a connecting part through which the crossbar passes.

2. The detection mechanism for sliver breakage during the doffing process of cotton slivers according to claim 1, characterized in that: The hook (61) and the main body of the hanger (6) are hinged together.

3. The detection mechanism for sliver breakage during the doffing process of cotton slivers according to claim 2, characterized in that: The pendant (6) is provided with a movable part connected to the guide unit (5). The movable part includes two symmetrically arranged axles. The guide unit (5) passes between the two axles and the axles rotate freely when they move relative to the guide unit (5).

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