A glass fiber broken yarn detection device and method

Abstract

The application discloses a glass fiber broken yarn detection device and a detection method. The detection device comprises a falling yarn penetrating sheet, a yarn passing rod, a fixed circle rotating rod, a photoelectric sensor, a mounting bracket, a front yarn penetrating plate, a rear yarn penetrating plate, a mounting plate and a controller. The falling yarn penetrating sheet comprises a yarn penetrating sheet main body, a rotating sleeve and a yarn penetrating plate arranged at both ends of the yarn penetrating sheet main body. The fixed circle rotating rod passes through the rotating sleeve, so that the falling yarn penetrating sheet can rotate and swing around the fixed circle rotating rod. A guide hole for yarn passing is arranged on the yarn penetrating plate. The detection device and method provided by the application are based on the principle of broken yarn detection by rotating the yarn penetrating sheet around the shaft. The falling yarn penetrating sheet and the matched detection system are designed, so that the photoelectric sensor is shielded during the falling and rotating process of the falling yarn penetrating sheet when the yarn is broken, and a machine stop signal is transmitted to the warp knitting main machine. The technical scheme is convenient for the machine operator to quickly find the broken yarn position, convenient for yarn penetration after the yarn is broken, and fast in production recovery.

Description

Technical Field

[0001] This invention belongs to the technical field of warp knitting machine structure in glass fiber production equipment, and specifically relates to a glass fiber yarn breakage detection device and detection method. Background Technology

[0002] During high-speed production, glass fiber weft yarns are prone to breakage when entering the process route from the auxiliary weft layer to the weft layer carriage. Existing imported looms are equipped with original factory weft yarn detection devices that detect multiple points simultaneously. However, these devices have low detection sensitivity and inaccurate display of the broken yarn location, often resulting in misjudgments and missed detections. This leads to high maintenance costs, program errors, and high prices.

[0003] Therefore, it is necessary to develop a method for detecting broken glass fiber yarns. Summary of the Invention

[0004] To address the problems of existing technologies, this invention provides a glass fiber yarn breakage detection device and method, which is a novel single-point warp knitting machine weft yarn breakage detection technology solution, enabling timely detection of yarn breaks. The technical solution of this invention is as follows:

[0005] As a first aspect of the present invention, a glass fiber yarn breakage detection device is provided, comprising a device frame and a drop-type yarn threading plate, a fixed-circle rotating rod, a photoelectric sensor, and a controller disposed on the device frame; the controller is signal-connected to the photoelectric sensor and receives the signal sent by the photoelectric sensor; the yarn passes through the drop-type yarn threading plate, and when the yarn breaks, the drop-type yarn threading plate rotates around the fixed-circle rotating rod, blocking the photoelectric sensor.

[0006] Preferably, the drop-type yarn threading sheet includes a yarn threading sheet body and a rotating sleeve and a yarn threading plate located at both ends of the yarn threading sheet body. The fixed-circle rotating rod passes through the rotating sleeve, allowing the drop-type yarn threading sheet to rotate and swing around the fixed-circle rotating rod. A yarn guide hole is provided on the yarn threading plate for the yarn to pass through. A detection baffle is provided on the lower surface of the yarn threading sheet body. When the yarn threading sheet body is in a horizontal state, the detection baffle does not block the photoelectric sensor. When the yarn threading sheet body rotates and falls around the fixed-circle rotating rod, the detection baffle blocks the photoelectric sensor.

[0007] Preferably, the detection baffle is triangular.

[0008] Preferably, the main body of the yarn threader has a notch to reduce weight.

[0009] Preferably, the yarn threading plate and the yarn threading sheet body have a certain angle, the size of which depends on the size of the equipment, so that the yarn can be nearly parallel to the axis of the yarn threading hole, in order to reduce the friction of the yarn threading hole on the yarn; as a typical embodiment, the yarn threading plate and the yarn threading sheet body are perpendicular to each other.

[0010] Preferably, the device frame includes a front yarn threading plate, a rear yarn threading plate, and a mounting plate. The mounting plate consists of two pieces, which together with the front and rear yarn threading plates form a square frame. The two ends of the fixed-circle rotating rod are fixed to the mounting plate, and the photoelectric sensor is fixed to the mounting plate.

[0011] Preferably, the detection device further includes a yarn guide rod, with both ends of the yarn guide rod fixed to the mounting plate; the yarn guide rod is located above the yarn threading plate and below the yarn, providing support for the yarn and preventing it from sagging and knotting.

[0012] Preferably, the front and rear yarn-feeding plates are respectively provided with evenly arranged yarn guides, through which the yarn enters the drop-type yarn-feeding plate.

[0013] Preferably, the drop-type yarn threading plates are evenly arranged within the device frame, and the yarn guide holes of the drop-type yarn threading plates correspond to the yarn guide eye positions of the front yarn threading plate and the rear yarn threading plate.

[0014] As a second aspect of the present invention, it is to provide a warp knitting machine including the aforementioned glass fiber yarn breakage detection device.

[0015] As a third aspect of the present invention, a method for detecting broken glass fiber yarns is provided, based on the aforementioned detection device, comprising the following steps:

[0016] The yarn is threaded into the detection device, and the weft state is detected by a photoelectric sensor. When the threading plate is in a lateral state under the action of yarn tension, the detection baffle does not block the photoelectric sensor. When the yarn passing through the falling threading plate breaks, the threading plate rotates and falls around the fixed circle rotating rod, and the detection baffle blocks the photoelectric sensor. The photoelectric sensor sends a signal to the controller. When the photoelectric sensor is blocked, the controller sends a stop signal to the warp knitting machine host to stop it. Based on the photoelectric sensor information return time and detection distance, the position of the falling threading plate where the falling action occurred is obtained, thereby determining the yarn breakage event and the location of the yarn breakage.

[0017] The inventors studied and analyzed the process route of the weft yarn entering the weft layer, and independently developed a new type of single-point warp knitting machine weft yarn breakage detection device. They optimized the detection mechanism, realized the technological innovation of weft yarn breakage monitoring, and filled the gap in the warp knitting machine weft yarn detection alarm system.

[0018] This novel single-point warp knitting machine weft yarn breakage detection device, based on a new detection principle, achieves high sensitivity and accuracy by individually detecting each yarn. It can accurately display the breakage location, allowing machine operators to quickly locate the breakage and reconnect the broken yarn frames. This reduces errors and drawbacks associated with manual monitoring, improves production efficiency and product quality, and lowers labor costs.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The detection device and method provided by this invention utilize the principle of detecting yarn breakage by rotating a yarn threading plate around an axis. By designing a drop-type yarn threading plate and its matching detection system, when a yarn breaks, the drop-type yarn threading plate, during its downward rotation around the axis, blocks the photoelectric sensor, transmitting a stop signal to the warp knitting main machine. This method facilitates yarn threading after a breakage and allows for rapid recovery.

[0021] 2. This invention provides a single-point weft yarn breakage detection method, including the installation method of the weft yarn detection system and the cooperation method between the front and rear yarn guide plates and the yarn threading plate. This reduces the inspection work of one operator for every two looms, facilitating personnel observation and adjustment of the weft yarn detection status, thereby improving production efficiency and product quality. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of a glass fiber yarn breakage detection device provided in Example 1;

[0024] Figure 2 This is a schematic diagram of a glass fiber yarn breakage detection device provided in Example 1 under normal yarn conditions;

[0025] Figure 3 This is a schematic diagram of the fiberglass yarn breakage detection device provided in Example 1, showing the yarn breakage status.

[0026] Figure 4 This is a schematic diagram of a glass fiber yarn breakage detection device provided in Example 1, installed on a warp knitting machine; the device is in a state where no yarn is placed.

[0027] Figure 5 This is a structural diagram of a warp knitting machine provided in Example 2.

[0028] Among them, 001-falling weft yarn breakage detection device, 002-warp knitting machine, 003-storage weft layer, 004-weft layer trolley, 005-constant tension weft yarn support frame, 006-yarn;

[0029] 101-Drop-type yarn feeder, 102-Yarn feeder rod, 103-Circular rotating rod, 104-Photoelectric sensor, 105-Mounting plate, 106-Front yarn feeder plate, 107-Rear yarn feeder plate; 201-Connecting rod;

[0030] 10101-Main body of the yarn threading plate, 10102-Rotating sleeve, 10103-Yarn threading plate, 10104-Detection baffle, 10105-Yarn guide hole. Detailed Implementation

[0031] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Example 1: A glass fiber yarn breakage detection device

[0034] like Figures 1-4 The image shows a falling weft yarn breakage detection device 001, comprising a falling yarn feeding plate 101, a yarn feeding rod 102, a fixed-circle rotating rod 103, a photoelectric sensor 104, a mounting plate 105, a front yarn feeding plate 106, a rear yarn feeding plate 107, and a controller. The controller is connected to the photoelectric sensor 104 for signal detection. Two mounting plates 105 are located at the ends of the front yarn feeding plate 106 and the rear yarn feeding plate 107, respectively, forming a square frame. The ends of the yarn feeding rod 102 and the fixed-circle rotating rod 103 are fixed to the mounting plate 105, and the photoelectric sensor 104 is fixed to the mounting plate 105.

[0035] The drop-type threading piece 101 includes a threading piece body 10101 and a rotating sleeve 10102 and a threading plate 10103 located at both ends of the threading piece body 10101. The fixed-circle rotating rod 103 passes through the rotating sleeve 10102, so that the drop-type threading piece 101 can rotate and swing around the fixed-circle rotating rod 103. A guide hole 10105 for the yarn 006 to pass through is provided on the threading plate 10103. A detection baffle 10104 is provided on the lower surface of the yarn threading sheet body 10101. When the yarn threading sheet body 10101 is in a transverse state under the action of yarn tension, the detection baffle 10104 does not block the photoelectric sensor 104. When the yarn passing through the falling yarn threading sheet 101 breaks, the yarn threading sheet body 10101 rotates and falls around the fixed circle rotating rod 103. The detection baffle 10104 blocks the photoelectric sensor 104. The photoelectric sensor 104 sends a signal to the controller. The controller receives the signal from the photoelectric sensor. When the photoelectric sensor is blocked, it sends a stop signal to the host. Based on the photoelectric sensor information return time and detection distance, the position of the falling yarn threading sheet 101 where the falling action occurred is obtained. Thus, the yarn breakage event and the location of the yarn breakage can be determined. As a typical embodiment, the detection baffle is triangular.

[0036] To reduce the load on the yarn by the drop-type yarn threader 101, the yarn threader body 10101 is provided with a notch to reduce weight.

[0037] Because the individual drop-type yarn threading plates 101 are closely arranged with small spacing, the use of this device in production can achieve an error of only two or three, making it easier for inspectors to quickly detect yarn breakage events and locate the breakage location, thus greatly improving the efficiency of determining the yarn breakage location.

[0038] The threading plate 10103 and the threading sheet body 10101 have a certain angle. The size of the angle depends on the size of the equipment. It is advisable that the yarn can be nearly parallel to the axis of the threading hole to reduce the friction of the threading hole on the yarn. As a typical embodiment, the threading plate 10103 and the threading sheet body 10101 are perpendicular to each other.

[0039] The yarn guide bar 102 is located above the yarn guide plate body 10101 and below the yarn, providing support for the yarn and preventing it from sagging and knotting.

[0040] The front threading plate 106 and the rear threading plate 107 are fixedly connected to the mounting plate 105 to form a complete yarn threading module, ensuring the travel path of each yarn. The front threading plate 106 and the rear threading plate 107 are respectively provided with evenly arranged yarn guides, and the yarn enters the drop-type threading plate through the yarn guides.

[0041] As a preferred embodiment, such as Figure 1As shown, the detection device includes several drop-type yarn threading plates 101, which are evenly arranged within the frame formed by the mounting plate, the front yarn threading plate 106, and the rear yarn threading plate 107. The yarn guide holes 10105 of the drop-type yarn threading plates 101 correspond to the yarn guide eye positions of the front yarn threading plate 106 and the rear yarn threading plate 107.

[0042] Figure 1 The photoelectric sensor 104 has an external connector. The transmitting end of the photoelectric sensor is located inside the mounting plate of the detection device, and the receiving end is located on the other end of the mounting plate. The photoelectric sensor is connected to the controller for signal transmission. One end transmits a signal and the other end receives a signal. When the signal is blocked, the controller transmits a stop signal to the host.

[0043] Controller: Used to process the signals transmitted by the photoelectric sensor 104 and send signals to the host.

[0044] The working principle of this device is as follows: Figure 2 and Figure 3 As shown, yarn 006 first passes through the guide eye on the front threading plate, then through the guide eye of the drop-type threading plate, during which the yarn is supported by tension provided by the threading rod. Subsequent yarns pass through the guide eye on the rear threading plate and enter the weft layer. At this time, the yarn is in a pulled-up state, and the triangular plate of the threading plate does not block the signal emitted by the photoelectric sensor. When the yarn breaks, the drop-type threading plate falls under gravity around the fixed-circle rotating rod. The protruding triangular detection baffle blocks the signal emitted by the photoelectric sensor, which transmits the signal to the controller. The controller sends a signal to the main unit, which then stops, waiting for the worker to thread the broken yarn.

[0045] Example 2, a warp knitting machine

[0046] like Figure 4 and Figure 5 As shown, the mounting plate 105 is assembled with the connecting rods 201 on both sides of the weft laying area of ​​the warp knitting machine, and is used to install the drop-type weft yarn breakage detection device 001. Preferably, the height of the drop-type weft yarn breakage detection device 001 can be raised and lowered, and adjusted using conventional methods in the mechanical field.

[0047] The usage process of the device of the present invention is described through examples.

[0048] A constant tension weft yarn support frame 005 is installed on the side of the warp knitting machine 002. Sixteen-head glass fiber yarns are placed in the constant tension weft yarn support frame 005. The glass fiber yarns 006 with uniform tension are threaded into the drop-type weft yarn breakage detection device 001 provided in Example 1. This device detects the weft yarn rotation state through a photoelectric sensor, and sends a signal to the warp knitting machine host to stop it in the event of a yarn breakage. The glass fiber yarns are then laid in layers using a yarn storage type weft layer 003 and a weft layer carriage 004.

[0049] Example 3: A method for detecting broken glass fiber yarns

[0050] The yarn is threaded into the falling weft yarn breakage detection device provided in Example 1. The device detects the weft yarn state through a photoelectric sensor. When the threading plate is in a lateral state under the action of yarn tension, the detection baffle does not block the photoelectric sensor. When the yarn passing through the falling threading plate breaks, the threading plate rotates and falls around the fixed circle rotating rod, and the detection baffle blocks the photoelectric sensor. The photoelectric sensor sends a signal to the controller. When the photoelectric sensor is blocked, the controller sends a stop signal to the warp knitting machine host to stop the machine. Based on the photoelectric sensor information return time and detection distance, the position of the falling threading plate where the falling action occurred can be obtained, thereby determining the yarn breakage event and the location of the yarn breakage.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A glass fiber yarn breakage detection device, characterized in that, The device includes a frame and a drop-type yarn threading plate, a fixed-circle rotating rod, a photoelectric sensor, and a controller, all mounted on the frame. The controller is signal-connected to the photoelectric sensor and receives signals sent by the photoelectric sensor. The yarn passes through the drop-type yarn threading plate, and when the yarn breaks, the drop-type yarn threading plate rotates around the fixed-circle rotating rod, blocking the photoelectric sensor. One yarn corresponds to one drop-type yarn threader; The drop-type yarn threading plate includes a yarn threading plate body and a rotating sleeve and a yarn threading plate located at both ends of the yarn threading plate body, respectively. The yarn threading plate is provided with a yarn guide hole for the yarn to pass through. The device frame includes a front threading plate, a rear threading plate, and a mounting plate. The front threading plate and the rear threading plate are respectively provided with evenly arranged yarn guides, through which the yarn enters the drop-type threading plate. The drop-type yarn threading plates are evenly arranged within the device frame. The yarn guide holes of the drop-type yarn threading plates correspond to the yarn guide eye positions of the front yarn threading plate and the rear yarn threading plate. The yarn threading plate is at an angle to the main body of the yarn threading plate, and the yarn is parallel to the axis of the yarn guide hole. A notch is provided on the main body of the yarn threading plate. A detection baffle is provided on the lower surface of the yarn threading sheet body. When the yarn threading sheet body is in a horizontal state, the detection baffle does not block the photoelectric sensor. When the yarn threading sheet body rotates and falls around the fixed circle rotating rod, the detection baffle blocks the photoelectric sensor. The mounting plate consists of two pieces, which together with the front yarn threading plate and the rear yarn threading plate form a square frame; the two ends of the fixed-circle rotating rod are fixed to the mounting plate, and the photoelectric sensor is fixed to the mounting plate; The detection device also includes a yarn guide rod, with both ends of the yarn guide rod fixed to the mounting plate; the yarn guide rod is located above the yarn threading plate body and below the yarn.

2. The detection device according to claim 1, characterized in that, The fixed-circle rotating rod passes through the rotating sleeve, allowing the falling yarn threading piece to rotate and swing around the fixed-circle rotating rod.

3. The detection device according to claim 1, characterized in that, The detection baffle is triangular.

4. A warp knitting machine, characterized in that, The device includes the glass fiber yarn breakage detection device according to any one of claims 1 to 3.

5. A method for detecting broken glass fiber yarns, characterized in that, The detection device according to any one of claims 2 to 3 includes the following steps: The yarn is threaded into the detection device, and the state of the yarn is detected by a photoelectric sensor. When the threading plate is in a lateral state under the action of yarn tension, the detection baffle does not block the photoelectric sensor. When the yarn passing through the falling threading plate breaks, the threading plate rotates and falls around the fixed circle rotating rod, and the detection baffle blocks the photoelectric sensor. When the photoelectric sensor is blocked, the controller sends a stop signal to the warp knitting machine host to stop it. Based on the photoelectric sensor information return time and detection distance, the position of the falling threading plate where the falling action occurred is obtained, thereby determining the yarn breakage event and the location of the yarn breakage.

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