A composite pultrusion process yarn knotting interception alarm system

Abstract

The application provides a composite material pultrusion process yarn knot interception alarm system, which comprises a base, a vertical adjusting frame arranged at the upper end of the base, a first-level interception device and a second-level interception device arranged on the vertical adjusting frame, an alarm for sending an alarm signal to the outside world, a traction linkage for controlling the running state of a traction device, and the traction device for traction of yarn forward movement; the system further comprises a controller for controlling the working state of the alarm and the traction linkage according to the signal fed back by a tension sensor; when a knot is detected, the system not only sends an audible and visual signal to the alarm to remind the staff, but also directly controls the traction device to stop running by means of the traction linkage, so as to prevent the knot yarn from continuing to move to the impregnation tank and to avoid the problem that the knot yarn enters the impregnation tank to cause product defects; the double response of "automatic stop + manual reminder" can greatly shorten the downtime of the production line and improve the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of yarn detection technology, and more specifically, to a yarn knotting interception alarm system for composite material pultrusion processes. Background Technology

[0002] Pultrusion, as a highly efficient continuous molding technology, has been widely applied in high-end manufacturing fields such as aerospace, rail transportation, and new energy due to its advantage of mass production of high-performance composite materials. The core process involves a traction device driving the fiber reinforcement material through resin impregnation and mold heating and curing, ultimately forming a continuous composite profile. However, in actual industrial production, the quality stability and continuous transport of the fiber reinforcement material (hereinafter referred to as "yarn") directly determine the product quality. If knots form in the yarn during storage, handling, or splicing, or if overlapping knots are not detected in time, the knotted yarn entering the impregnation tank can cause defects such as bubbles and delamination inside the product, or even blockage at the mold entrance, forcing the entire production line to stop for cleaning. This not only wastes a large amount of raw materials but also significantly reduces production efficiency, resulting in serious economic losses for the company. Therefore, early detection and interception of yarn knots has become an urgent industry challenge in composite pultrusion.

[0003] Patent CN116334824A, "A Jacquard Device and Process for Extra-Fine High-Density Embroidered Fabrics," discloses a knot alarm structure based on mechanical compression triggering. This structure comprises a cleaning rod, a combing frame, and a buzzer with a contact switch. The push force generated when a knotted yarn gets stuck on the cleaning rod moves the combing frame along a sliding frame, causing a moving rubber sleeve to compress the contact switch and trigger the buzzer alarm. Simultaneously, a dust-cleaning ring removes yarn fuzz, and a positioning structure assists in quickly locating the knot. This technology effectively avoids the false alarm problems caused by environmental vibrations and wind interference, which can affect high-sensitivity sensors, and is relatively low-cost, demonstrating certain advantages in yarn knot detection during textile jacquard processes.

[0004] However, when the above knot detection technology in the textile field is directly applied to the pultrusion process of composite materials, there is obvious insufficient adaptability: on the one hand, the yarns used in the pultrusion process of composite materials have various specifications (such as glass fiber yarns and carbon fiber yarns with different diameters and different materials), and the yarn tension fluctuates with the change of traction speed during production. The fixed gap cleaning rod in CN116334824A cannot adapt to yarns of different specifications, and it is also difficult to compensate for the subtle change of yarn diameter caused by tension fluctuation, which is prone to the problems of missed detection or excessive extrusion damage to yarns; on the other hand, the pultrusion process of composite materials has extremely high requirements for production continuity, and the loss of one shutdown is far greater than that of textile jacquard process, while the alarm of CN116334824A only relies on buzzer prompt, and lacks the linked shutdown function with traction equipment.

[0005] Therefore, there is an urgent need to develop a yarn knot interception and alarm system for composite material pultrusion process that is specially designed for composite material pultrusion process, which can detect and intercept knotted yarn in time, so that it cannot enter the glue dipping tank and affect normal production. Summary of the Invention

[0006] In view of this, the present invention aims to provide a yarn knot interception and alarm system for composite material pultrusion process to solve the problem in the prior art that knotted yarn cannot be detected and intercepted in time, and the knotted yarn enters the glue dipping tank, resulting in defects in products.

[0007] To achieve the above purpose, the technical solution of the present invention is implemented as follows:

[0008] A yarn knot interception and alarm system for composite material pultrusion process, comprising:

[0009] a base arranged on a horizontal ground;

[0010] a vertical adjusting frame arranged at the upper end of the base;

[0011] the vertical adjusting frame is provided with a primary intercepting device and a secondary intercepting device, the primary intercepting device is arranged at the front end of the secondary intercepting device, the primary intercepting device is used for intercepting knots with a diameter larger than the knotted yarn, and the secondary intercepting device is used for intercepting knots with a diameter larger than the knotted yarn, ;

[0012] tension sensors including a first tension sensor and a second tension sensor, the first tension sensor is arranged on the primary intercepting device and is used for detecting the stress state of the primary intercepting device in real time, and the second tension sensor is arranged on the secondary intercepting device and is used for detecting the stress state of the secondary intercepting device in real time;

[0013] an alarm arranged on the vertical adjusting frame and used for sending an alarm signal to the outside;

[0014] A traction linkage, mounted on the vertical adjustment frame, is used to control the operating state of the traction device, which is used to pull the yarn forward.

[0015] It also includes a controller for controlling the working status of the alarm and traction linkage based on the signal fed back by the tension sensor, and the controller is equipped with a touch screen for displaying the system's operating status information and input control information.

[0016] Furthermore, the primary interception device includes a first upper interception bar and a first lower interception bar, the distance between the first upper interception bar and the first lower interception bar being [missing information]. The secondary interception device includes a second upper interception bar and a second lower interception bar, the distance between the second upper interception bar and the second lower interception bar being [missing information]. .

[0017] Furthermore, the left end of the primary interceptor is provided with a first left connecting bolt, and the right end is provided with a first right connecting bolt. The first left connecting bolt is used to fix the left end of the primary interceptor, and the first right connecting bolt is used to fix the right end of the primary interceptor.

[0018] The first left connecting bolt and the first right connecting bolt cooperate to adjust the distance between the first upper interceptor and the first lower interceptor;

[0019] The secondary interceptor is provided with a second left connecting bolt at its left end and a second right connecting bolt at its right end. The second left connecting bolt is used to fix the left end of the secondary interceptor and the second right connecting bolt is used to fix the right end of the secondary interceptor.

[0020] The second left connecting bolt and the second right connecting bolt cooperate to adjust the distance between the second upper interceptor and the second lower interceptor.

[0021] Furthermore, the surfaces of the first upper interceptor bar, the first lower interceptor bar, the second upper interceptor bar, and the second lower interceptor bar are coated with polytetrafluoroethylene.

[0022] Furthermore, the vertical adjustment frame includes a left adjustment frame and a right adjustment frame, the left adjustment frame includes a left front adjustment frame and a left rear adjustment frame, and the right adjustment frame includes a right front adjustment frame and a right rear adjustment frame;

[0023] The left front adjustment frame and the left rear adjustment frame are fixed together by a left connecting rod. The left connecting rod includes an upper left connecting rod and a lower left connecting rod. The upper left connecting rod is located near the upper end of the vertical adjustment frame, and the lower left connecting rod is located near the lower end of the vertical adjustment frame.

[0024] The right front adjustment frame and the right rear adjustment frame are fixed together by a right connecting rod. The right connecting rod includes an upper right connecting rod and a lower right connecting rod. The upper right connecting rod is located near the upper end of the vertical adjustment frame, and the lower right connecting rod is located near the lower end of the vertical adjustment frame.

[0025] The left front adjustment frame and the right front adjustment frame are fixed together by a front connecting rod, which is located near the upper end of the vertical adjustment frame; the left rear adjustment frame and the right rear adjustment frame are fixed together by a rear connecting rod, which is located near the upper end of the vertical adjustment frame.

[0026] The left end of the first-level interceptor is mounted on the left front adjustment frame, and the right end is mounted on the right front adjustment frame. The left end of the second-level interceptor is mounted on the left rear adjustment frame, and the right end is mounted on the right rear adjustment frame.

[0027] Furthermore, the vertical adjustment frame is equipped with multiple primary and secondary interception devices evenly arranged from top to bottom, and the primary and secondary interception devices correspond one-to-one.

[0028] Furthermore, when the tension sensor experiences a tension force greater than the alarm threshold during operation, the alarm emits an audible and visual alarm signal, and the traction linkage controls the traction device to stop operating.

[0029] Furthermore, the controller is equipped with a reset button for starting the system.

[0030] Compared with existing technologies, the composite material pultrusion process yarn knotting interception alarm system of the present invention has the following advantages:

[0031] 1) When a knot is detected, the alarm can not only send out an audible and visual signal to remind the staff, but also directly control the traction device to stop running through the traction linkage to prevent the knotted yarn from continuing to move into the impregnation tank. This avoids the problem of knotted yarn entering the impregnation tank and causing product defects from the source. This dual response of "automatic shutdown + manual reminder" can greatly shorten the downtime of the production line and improve production efficiency.

[0032] 2) It can identify both larger and smaller knotted yarns, greatly improving the accuracy of detection. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the yarn knotting interception and alarm system for composite material pultrusion process according to an embodiment of the present invention;

[0034] Figure 2 for Figure 1 A structural diagram from a second perspective;

[0035] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0036] Figure 4 for Figure 1 A structural diagram from a third-person perspective;

[0037] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Base; 11. Left support rod; 12. Front support rod; 13. Right support rod; 14. Rear support rod; 15. Left front reinforcing rod; 16. Left rear reinforcing rod; 17. Right front reinforcing rod; 18. Right rear reinforcing rod; 2. Vertical adjustment frame; 21. Left adjustment frame; 211. Left front adjustment frame; 212. Left rear adjustment frame; 22. Right adjustment frame; 221. Right front adjustment frame; 222. Right rear adjustment frame; 3. First-stage interception device; 31. First 32. Upper interceptor bar; 4. First lower interceptor bar; 51. Second upper interceptor bar; 52. Second lower interceptor bar; 53. First left connecting bolt; 54. Second left connecting bolt; 6. Second right connecting bolt; 7. Left connecting rod; 81. Upper left connecting rod; 92. Lower left connecting rod; 10. Right connecting rod; 11. Upper right connecting rod; 12. Lower right connecting rod; 13. Front connecting rod; 14. Rear connecting rod. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] Example 1

[0042] like Figure 1-5 As shown, this embodiment provides a yarn knotting interception alarm system for composite material pultrusion processes, including:

[0043] Base 1, located on a horizontal surface;

[0044] Vertical adjustment bracket 2 is located at the upper end of base 1;

[0045] The vertical adjustment frame 2 is equipped with a primary interception device 3 and a secondary interception device 4. The primary interception device 3 is located at the front end of the secondary interception device 4, and the primary interception device 3 is used to intercept objects with a diameter greater than [missing information]. The knotted yarn, the secondary interception device 4 is used to intercept the diameter greater than Knotted yarn, ;

[0046] The tension sensor includes a first tension sensor and a second tension sensor. The first tension sensor is installed on the first-level interception device 3 and is used to detect the force state of the first-level interception device 3 in real time. The second tension sensor is installed on the second-level interception device 4 and is used to detect the force state of the second-level interception device 4 in real time.

[0047] An alarm device, installed on the vertical adjustment frame 2, is used to send alarm signals to the outside world;

[0048] A traction linkage, mounted on the vertical adjustment frame 2, is used to control the operating state of the traction device, which is used to pull the yarn forward.

[0049] It also includes a controller for controlling the working status of the alarm and traction linkage based on the signal fed back by the tension sensor, and the controller is equipped with a touch screen for displaying the system's operating status information and input control information.

[0050] Specifically, the first-level interceptor 3 targets diameters greater than... The larger knotted yarns are initially intercepted, while the secondary interception device 4 focuses on yarns with a diameter greater than [missing information]. The system detects smaller knotted yarns, forming a progressive interception system that goes from coarse to fine. This design avoids the problems of "missing small knotted yarns" or "over-intercepting normal yarns" caused by a single interception gap. It can identify both larger and smaller knotted yarns, significantly improving the accuracy of detection.

[0051] The primary and secondary interception devices are each equipped with tension sensors, which can independently detect their respective force changes. When a certain level of interception device jams the knotted yarn, its force will immediately exceed the normal range. The corresponding tension sensor can quickly capture this signal and feed it back to the controller, helping staff to quickly locate the knot position and approximate size, shortening the troubleshooting time, and further ensuring the timeliness and reliability of detection and alarm.

[0052] When a knot is detected, the system can not only alert workers with an audible and visual alarm, but also directly control the traction device to stop, preventing the knotted yarn from continuing to move into the impregnation tank. This avoids the problem of knotted yarn entering the impregnation tank and causing product defects from the source. Compared with the traditional solution that relies solely on alarm prompts and requires manual shutdown, this dual response of "automatic shutdown + manual reminder" can significantly shorten the downtime of the production line and improve production efficiency.

[0053] The touch screen can intuitively display the system's operating data, such as the real-time force values ​​of each tension sensor, the inter-pole spacing values ​​of the first and second level interception devices, and the working status of the alarm and traction linkage. Staff do not need to check each hardware component one by one; they can quickly grasp the overall operating status of the system through the touch screen, greatly shortening the troubleshooting time.

[0054] In addition, staff can directly input control commands via the touchscreen display, such as modifying the alarm threshold of the tension sensor according to production needs. This setting not only simplifies the parameter adjustment process but also allows for quick adaptation to the detection requirements of different batches of yarn, improving the system's adaptability to diverse production scenarios.

[0055] The tension sensor in question is existing technology and will not be described in detail here.

[0056] As a preferred example of this application, the primary interception device 3 includes a first upper interception bar 31 and a first lower interception bar 32, the distance between the first upper interception bar 31 and the first lower interception bar 32 being [missing information]. The secondary interception device 4 includes a second upper interception bar 41 and a second lower interception bar 42, and the distance between the second upper interception bar 41 and the second lower interception bar 42 is [missing information]. .

[0057] Specifically, the first-level interception device 3 forms a gap between the first upper interception bar 31 and the first lower interception bar 32. It can specifically intercept diameters larger than Larger knotted yarns; the secondary interception device 4 forms a gap X2 through the second upper interception rod 41 and the second lower interception rod 42, which can intercept knotted yarns with a diameter greater than X2. The two work together to realize the hierarchical detection logic of "first intercepting large knots and then intercepting small knots", avoiding the problem of missing knots of different sizes due to a single interception gap, and greatly improving the detection range and accuracy of yarn knots.

[0058] As a preferred example of this application, the first-level interceptor 3 is provided with a first left connecting bolt 51 at its left end and a first right connecting bolt 52 at its right end. The first left connecting bolt 51 is used to fix the left end of the first-level interceptor 3, and the first right connecting bolt 52 is used to fix the right end of the first-level interceptor 3.

[0059] The first left connecting bolt 51 and the first right connecting bolt 52 cooperate to adjust the distance between the first upper intercepting rod 31 and the first lower intercepting rod 32.

[0060] The second-level interceptor 4 is provided with a second left connecting bolt 53 at its left end and a second right connecting bolt 54 at its right end. The second left connecting bolt 53 is used to fix the left end of the second-level interceptor 4, and the second right connecting bolt 54 is used to fix the right end of the second-level interceptor 4.

[0061] The second left connecting bolt 53 and the second right connecting bolt 54 cooperate to adjust the distance between the second upper intercepting rod 41 and the second lower intercepting rod 42.

[0062] Specifically, this design allows for flexible adjustment of yarns of different diameters and materials used in the pultrusion process of composite materials. and The value solves the problem that the fixed gap in the existing technology cannot be adapted to a variety of yarns. At the same time, it can also compensate for the slight changes in the diameter of the yarn caused by tension fluctuations, and reduce the situation of missed detection or excessive compression damage to the yarn.

[0063] As a preferred example of this application, the surfaces of the first upper interceptor bar 31, the first lower interceptor bar 32, the second upper interceptor bar 41, and the second lower interceptor bar 42 are provided with a polytetrafluoroethylene coating.

[0064] Specifically, in the composite material pultrusion process, the yarn (such as glass fiber yarn or carbon fiber yarn) needs to continuously pass through the first upper intercepting rod 31 and the first lower intercepting rod 32 of the first-stage intercepting device 3, as well as the second upper intercepting rod 41 and the second lower intercepting rod 42 of the second-stage intercepting device 4. The polytetrafluoroethylene coating has an extremely low coefficient of friction, which can significantly reduce the sliding friction between the intercepting rod and the yarn, and prevent the yarn from developing fuzz, breakage or surface damage due to friction during the traction and interception process.

[0065] As a preferred example of this application, the vertical adjustment frame 2 includes a left adjustment frame 21 and a right adjustment frame 22. The left adjustment frame 21 includes a left front adjustment frame 211 and a left rear adjustment frame 212, and the right adjustment frame 22 includes a right front adjustment frame 221 and a right rear adjustment frame 222.

[0066] The left front adjustment frame 211 and the left rear adjustment frame 212 are fixed together by a left connecting rod 6. The left connecting rod 6 includes an upper left connecting rod 61 and a lower left connecting rod 62. The upper left connecting rod 61 is located near the upper end of the vertical adjustment frame 2, and the lower left connecting rod 62 is located near the lower end of the vertical adjustment frame 2.

[0067] The right front adjustment bracket 221 and the right rear adjustment bracket 222 are fixed together by a right connecting rod 7. The right connecting rod 7 includes an upper right connecting rod 71 and a lower right connecting rod 72. The upper right connecting rod 71 is located near the upper end of the vertical adjustment bracket 2, and the lower right connecting rod 72 is located near the lower end of the vertical adjustment bracket 2.

[0068] The left front adjustment frame 211 and the right front adjustment frame 221 are fixed together by a front connecting rod 81, which is located near the upper end of the vertical adjustment frame 2; the left rear adjustment frame 212 and the right rear adjustment frame 222 are fixed together by a rear connecting rod 82, which is located near the upper end of the vertical adjustment frame 2.

[0069] The left end of the primary interceptor 3 is mounted on the left front adjustment frame 211, and the right end is mounted on the right front adjustment frame 221. The left end of the secondary interceptor 4 is mounted on the left rear adjustment frame 212, and the right end is mounted on the right rear adjustment frame 222.

[0070] Specifically, this structure, with its left-right bidirectional fixing and top-bottom multi-point reinforcement, tightly connects all components of the vertical adjustment frame 2 into a whole, effectively resisting the lateral tension generated on the interception device during yarn traction, preventing the adjustment frame or interception device from shifting or swaying, and ensuring the interception spacing ( , The stability of the device provides structural support, reducing missed detections or false alarms caused by device displacement.

[0071] Preferably, the base 1 is composed of a left support rod 11, a front support rod 12, a right support rod 13 and a rear support rod 14 connected vertically in sequence; the left adjustment frame 21 is disposed on the left support rod 11 and the right adjustment frame 22 is disposed on the right support rod 13.

[0072] Preferably, the base 1 is provided with a left front reinforcing rod 15, a left rear reinforcing rod 16, a right front reinforcing rod 17, and a right rear reinforcing rod 18. The left front reinforcing rod 15 is used to connect and fix the left front adjusting frame 211 and the base 1, the left rear reinforcing rod 16 is used to connect and fix the left rear adjusting frame 212 and the base 1, the right front reinforcing rod 17 is used to connect and fix the right front adjusting frame 221 and the base 1, and the right rear reinforcing rod 18 is used to connect and fix the right rear adjusting frame 222 and the base 1.

[0073] As a preferred example of this application, the vertical adjustment frame 2 is provided with a plurality of primary interception devices 3 and secondary interception devices 4 evenly arranged from top to bottom, and the primary interception devices 3 and secondary interception devices 4 correspond one-to-one.

[0074] Specifically, this setup enables independent primary and secondary interception detection of multiple yarns simultaneously, achieving parallel knot detection of multiple yarns, significantly improving the overall operating efficiency of the production line, and meeting the needs of industrialized mass production.

[0075] As a preferred example of this application, when the tension sensor experiences a tension force greater than the alarm threshold tension force during operation, the alarm emits an audible and visual alarm signal, and the traction linkage controls the traction device to stop operating.

[0076] Specifically, during normal yarn feeding, the first tension sensor on the primary interceptor 3 and the second tension sensor on the secondary interceptor 4 only bear the stable tension of normal yarn traction. However, when a knotted yarn gets stuck in the interceptor, it generates additional resistance, causing the tension sensor to detect a significant increase in tension. When the tension exceeds the alarm threshold, an alarm is triggered and the machine stops. This setting can accurately distinguish between normal yarn feeding and knotted jamming, avoiding false alarms caused by environmental vibration, wind interference, or slight yarn tension fluctuations. At the same time, it can also capture the resistance changes caused by minor knots through tension changes, reducing the probability of missed detection. Compared with traditional mechanical extrusion triggering, it is more suitable for the detection accuracy requirements of composite material pultrusion processes.

[0077] The tension sensor detects the force state of the interception device in real time. Once the tension reaches the threshold, the controller will simultaneously trigger the alarm and the traction linkage. The entire process does not require manual judgment or operation, and the response speed is much faster than manual inspection. This automated response mechanism can complete the alarm and shutdown at the first moment when knotting occurs, reducing the scope of the fault and improving the automation level of the production line.

[0078] As a preferred example of this application, the controller is provided with a reset button for starting the system.

[0079] Specifically, when the system triggers an alarm and stops due to the detection of knotted yarn, after the staff cleans up the knotted yarn and troubleshoots the problem, they can directly restart the system via the reset button on the controller without a complicated restart process. This convenient startup method can significantly shorten the interval between troubleshooting and the resumption of production line operation, reduce production losses caused by downtime, and is especially suitable for the high requirements of production continuity in composite material pultrusion processes, helping companies reduce the economic costs caused by unplanned downtime.

[0080] As a preferred example of this application, the vertical adjustment rod is provided with a temperature sensor and a humidity sensor, the temperature sensor being used to detect the ambient temperature information and the humidity sensor being used to detect the ambient humidity information;

[0081] The controller outputs the distance between the first upper interceptor bar 31 and the first lower interceptor bar 32, as well as the distance between the second upper interceptor bar 41 and the second lower interceptor bar 42, through a touch screen based on the information fed back by the temperature sensor and the humidity sensor.

[0082] Specifically, in the pultrusion process of composite materials, changes in ambient temperature and humidity may cause physical changes in the yarn or interceptor bars, such as thermal expansion and contraction, and moisture absorption expansion (e.g., the yarn diameter slightly increases when the temperature rises, and the bar may deform slightly when the humidity is too high). If the interception spacing is fixed, it is easy for normal yarns to be misjudged as knots or small knots to be missed. Temperature and humidity sensors capture environmental parameters in real time, and the controller calculates and outputs an appropriate interception spacing based on this. , This technology can promptly compensate for the impact of environmental changes on detection accuracy, ensuring that the interception spacing always matches the actual state of the yarn, thereby reducing false alarms and missed alarms caused by environmental interference and guaranteeing the reliability of detection results.

[0083] The controller directly outputs the appropriate interception spacing value via a touch screen, allowing staff to quickly adjust the interception bar spacing based on the precise data displayed on the screen, eliminating the need for experience-based judgment or additional measurements and calculations. This setup avoids improper spacing settings caused by human experience errors and eliminates cumbersome parameter conversion processes, significantly reducing the difficulty of operation and maintenance and shortening adjustment time. Especially in scenarios where multiple interception devices are adjusted simultaneously, it can significantly improve overall operation and maintenance efficiency.

[0084] Preferably, when the ambient temperature is higher than 40°C or the humidity is higher than 80%RH, the distance between the first upper interceptor bar 31 and the first lower interceptor bar 32, and the distance between the second upper interceptor bar 41 and the second lower interceptor bar 42, are increased by 0.05mm.

[0085] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A composite pultrusion process yarn knot intercept alarm system characterized by, include: The base (1) is located on a horizontal ground; A vertical adjustment bracket (2) is located at the upper end of the base (1); The vertical adjusting frame (2) is provided with a first intercepting device (3) and a second intercepting device (4), the first intercepting device (3) is arranged at the front end of the second intercepting device (4), the first intercepting device (3) is used for intercepting the knot yarn with the diameter greater than The second intercepting device (4) is used for intercepting the knot yarn with the diameter greater than The second intercepting device (4) is used for intercepting the knot yarn with the diameter greater than ; The tension sensor includes a first tension sensor and a second tension sensor. The first tension sensor is installed on the first-level interception device (3) and is used to detect the force state of the first-level interception device (3) in real time. The second tension sensor is installed on the second-level interception device (4) and is used to detect the force state of the second-level interception device (4) in real time. An alarm is installed on the vertical adjustment frame (2) and is used to send an alarm signal to the outside world; A traction linkage is provided on the vertical adjustment frame (2) and is used to control the operating state of the traction device, which is used to pull the yarn forward. It also includes a controller for controlling the working status of the alarm and traction linkage based on the signal fed back by the tension sensor. The controller is equipped with a touch screen for displaying the system's operating status information and inputting control information. The first-level interception device (3) includes a first upper interception bar (31) and a first lower interception bar (32), and the distance between the first upper interception bar (31) and the first lower interception bar (32) is... The secondary interception device (4) includes a second upper interception bar (41) and a second lower interception bar (42), the distance between the second upper interception bar (41) and the second lower interception bar (42) being... The first-level interceptor (3) is provided with a first left connecting bolt (51) on the left end and a first right connecting bolt (52) on the right end. The first left connecting bolt (51) is used to fix the left end of the first-level interceptor (3), and the first right connecting bolt (52) is used to fix the right end of the first-level interceptor (3). The first left connecting bolt (51) and the first right connecting bolt (52) cooperate to adjust the distance between the first upper intercepting rod (31) and the first lower intercepting rod (32); The second-level interceptor (4) is provided with a second left connecting bolt (53) at the left end and a second right connecting bolt (54) at the right end. The second left connecting bolt (53) is used to fix the left end of the second-level interceptor (4), and the second right connecting bolt (54) is used to fix the right end of the second-level interceptor (4). The second left connecting bolt (53) and the second right connecting bolt (54) cooperate to adjust the distance between the second upper intercepting bar (41) and the second lower intercepting bar (42).

2. The composite material pultrusion process yarn knotting interception alarm system according to claim 1, characterized in that, The surfaces of the first upper interceptor (31), the first lower interceptor (32), the second upper interceptor (41), and the second lower interceptor (42) are coated with polytetrafluoroethylene.

3. The composite material pultrusion process yarn knotting interception alarm system according to claim 1, characterized in that, The vertical adjustment frame (2) includes a left adjustment frame (21) and a right adjustment frame (22). The left adjustment frame (21) includes a left front adjustment frame (211) and a left rear adjustment frame (212). The right adjustment frame (22) includes a right front adjustment frame (221) and a right rear adjustment frame (222). The left front adjustment bracket (211) and the left rear adjustment bracket (212) are fixed together by a left connecting rod (6). The left connecting rod (6) includes a left upper connecting rod (61) and a left lower connecting rod (62). The left upper connecting rod (61) is located near the upper end of the vertical adjustment bracket (2), and the left lower connecting rod (62) is located near the lower end of the vertical adjustment bracket (2). The right front adjustment bracket (221) and the right rear adjustment bracket (222) are fixed together by a right connecting rod (7). The right connecting rod (7) includes an upper right connecting rod (71) and a lower right connecting rod (72). The upper right connecting rod (71) is located near the upper end of the vertical adjustment bracket (2), and the lower right connecting rod (72) is located near the lower end of the vertical adjustment bracket (2). The left front adjustment bracket (211) and the right front adjustment bracket (221) are fixed together by a front connecting rod (81), which is located near the upper end of the vertical adjustment bracket (2); the left rear adjustment bracket (212) and the right rear adjustment bracket (222) are fixed together by a rear connecting rod (82), which is located near the upper end of the vertical adjustment bracket (2). The left end of the first-level interceptor (3) is mounted on the left front adjustment frame (211), and the right end is mounted on the right front adjustment frame (221). The left end of the second-level interceptor (4) is mounted on the left rear adjustment frame (212), and the right end is mounted on the right rear adjustment frame (222).

4. The composite material pultrusion process yarn knotting interception alarm system according to claim 1, characterized in that, The vertical adjustment frame (2) is provided with a plurality of primary interception devices (3) and secondary interception devices (4) evenly arranged from top to bottom, and the primary interception devices (3) and secondary interception devices (4) correspond one to one.

5. The composite material pultrusion process yarn knotting interception alarm system according to claim 1, characterized in that, When the tension sensor experiences a tension force greater than the alarm threshold during operation, the alarm emits an audible and visual alarm signal, and the traction linkage controls the traction device to stop operating.

6. The composite material pultrusion process yarn knotting interception alarm system according to claim 1, characterized in that, The controller is equipped with a reset button for starting the system.

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