Polyethylene monofilament on-line quality detection equipment

Abstract

The polyethylene monofilament online quality detection equipment comprises a working plate, four supporting legs are arranged at the bottom of the working plate, rubber mats are arranged at the bottoms of the four supporting legs, the rubber mats are of hollow structures, four supporting rods are fixedly installed at the top of the working plate, and the same top plate is installed at the tops of the four supporting rods; the power distribution box and the controller are arranged at the top of the working plate, an image centralized processing system is arranged in the power distribution box, a box cover and a plurality of monofilament conveying mechanisms are rotationally installed on the side face of the power distribution box, monofilaments are conveyed through the monofilament conveying mechanisms, and the monofilament conveying mechanisms are used for conveying the monofilaments. According to the device, by adjusting the detection position, one detection device can detect multiple groups of monofilaments under the same working condition, when the monofilaments are close to one another for detection, the monofilaments can be automatically wrapped, the monofilaments are prevented from being influenced by external light, and the accuracy of the detection result is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyethylene monofilament detection, in particular to a polyethylene monofilament online quality detection equipment. BACKGROUND

[0002] The detection range of polymer monofilament covers various types of polymer materials, including but not limited to: polyethylene (PE), polypropylene (PP), polyester (PET), polyurethane (PU), polyamide (PA), polystyrene (PS), in addition, the detection is also applicable to monofilaments of different diameters and specifications, such as monofilaments used in textiles, engineering plastics, and various industrial applications. Whether it is new material development or quality control of existing products, machine vision technology is to use machines to replace human eyes to observe objects for measurement and judgment. The machine vision system is to convert the target into an image signal through a machine vision product (i.e. an image acquisition device, divided into CMOS and CCD), and transmit it to a special image processing system to obtain the shape information of the target. According to the pixel distribution and brightness, color and other information, it is converted into a digital signal; the image system performs various operations on these signals to extract the characteristics of the target, and then outputs the results of the judgment. Polyethylene monofilament is a kind of fiber yarn product, according to different specifications of yarn product, the diameter of each yarn is about 0.1-0.01mm, and the production line will produce about 100-300 yarns at the same time; the production steps are divided into batching, hot melting, spinning, cooling, extraction, drying, drawing, and winding forming; especially in the production process of drying, drawing, and winding, due to factors such as temperature, stretching ratio, speed, and environment, yarn quality defects are easily caused, such as loose yarn, joint, broken yarn, and oil stain. In the yarn production process, the running speed is fast, and the product defects are small, so manual work cannot find and record the defects in real time.

[0003] According to the search, the publication (announcement) No. CN213658599U discloses an online detection system for ultra-high molecular weight polyethylene fiber, the yarn to be detected passes through the detection station, the detection station is provided with at least two linear cameras for collecting image information of the passing yarn, the detection station is also provided with an illuminating lamp for illuminating the passing yarn, the linear camera and the illuminating lamp are both fixed on the bracket of the detection station, and the linear camera and the illuminating lamp are both connected with the image centralized processing system through signal lines. The illuminating lamp is an LED light source, and the irradiation position of the LED light source is the same as the image collection position of the linear camera. The image centralized processing system comprises an industrial computer, a power module, a display screen, a printer, an Ethernet converter and a control board, the linear camera and the illuminating lamp are connected with the signal output end of the industrial computer, the signal input end of the industrial computer is connected with the control board, the display screen and the printer are connected with the signal output end of the industrial computer, the power module is connected with the power end of the industrial computer, and the communication interface of the industrial computer is connected with the Ethernet converter. The image centralized processing system is connected with the yarn spindle position signal acquisition network through the Ethernet converter. The yarn spindle position signal acquisition network is provided with a CAN bus module connected with the Ethernet converter, and the CAN bus module is connected with the yarn spindle position and the start-stop switch.

[0004] The polyethylene monofilament online quality detection equipment in the prior art can only detect a single yarn during use, and the detection result is easily affected by external light, thereby affecting the detection result and leading to inaccurate detection result. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the polyethylene monofilament online quality detection equipment provided by the present application can only detect a single yarn during use, and the detection result is easily affected by external light, thereby affecting the detection result and leading to inaccurate detection result.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a polyethylene monofilament online quality detection equipment, comprising: A workbench is provided with four supporting legs at the bottom, and a rubber pad is arranged at the bottom of each supporting leg. The rubber pad is a hollow structure, which plays a role in shock absorption and noise reduction. Four supporting rods are fixedly installed on the top of the workbench, and a same top plate is installed on the top of the four supporting rods; A distribution box and a controller are arranged on the top of the workbench. An image centralized processing system is arranged in the distribution box, and a box cover is rotatably installed on the side of the distribution box; A plurality of monofilament conveying mechanisms are arranged to convey monofilaments, and the monofilament conveying mechanisms are used to convey monofilaments; A detection position adjusting mechanism is arranged at the bottom of the top plate and is used to adjust the detection position of the monofilament; The light-proof monofilament detection mechanism is installed at the bottom of the detection position adjusting mechanism and used for light-proof detection of the monofilament.

[0007] Preferably, the monofilament conveying mechanism comprises two groups of supports, each group of supports has two supports, two conveying rollers are rotatably installed between each group of supports, the two conveying rollers are used for conveying the monofilament, and the two conveying rollers are made of rubber or plastic.

[0008] Preferably, the detection position adjusting mechanism comprises a fixed plate, the fixed plate is fixedly installed at the bottom center of the top plate, a screw rod slot is formed in the bottom of the fixed plate, a threaded rod is rotatably installed in the screw rod slot, a moving block is threadedly connected to the outer side of the threaded rod, a servo motor is installed on the outer side of the threaded rod, the servo motor is installed on the outer side of the fixed plate, an n-shaped frame is fixedly installed at the bottom of the moving block, and the light-proof monofilament detection mechanism is fixedly connected to the n-shaped frame.

[0009] Preferably, two guide slots are formed in the bottom of the fixed plate, a guide block is slidably installed in each of the two guide slots, and the two guide blocks are fixedly installed at the top of the n-shaped frame, so that the n-shaped frame can stably move at the bottom of the fixed plate.

[0010] Preferably, the light-proof monofilament detection mechanism comprises a connecting plate, the connecting plate is fixedly installed on the n-shaped frame, two push rod motors are fixedly installed at the bottom of the connecting plate, the two push rod motors are symmetrically arranged, the same light-proof box supporting strip is installed at the output end of the two push rod motors, a linear camera is arranged at the bottom center of the light-proof box supporting strip, two illuminating lamps are installed at the bottom of the light-proof box supporting strip, and the two illuminating lamps are symmetrically arranged on the two sides of the linear camera.

[0011] Preferably, two light-proof boxes are symmetrically slidably installed on the outer side of the light-proof box supporting strip, half-circular linear holes are formed in the inner sides of the two light-proof boxes, and the two half-circular linear holes are combined into one linear hole for conveying the monofilament.

[0012] Preferably, an adaptive inclined surface is arranged at the bottom of the light-proof box, so that the light-proof box can be inserted between the two monofilaments.

[0013] Preferably, a rectangular sliding hole is formed in the light-proof box, a sliding block is fixedly installed on the inner wall of each of the two sides of the rectangular sliding hole, two sliding grooves are formed in the two sides of the light-proof box supporting strip, a reset spring is arranged on the inner wall of each of the four sliding grooves, and the sliding block is slidably connected to the inner wall of the corresponding sliding groove and fixedly installed with the corresponding reset spring.

[0014] Preferably, the top of the light-shielding box support bar is symmetrically mounted with two round rods via bearings. The two round rods are located on the outside of the two light-shielding boxes. Limiting plates are fixedly installed on the top of each of the two round rods. Two round holes are opened on the connecting plate. The two round rods cooperate with the two round holes. The inner walls of the two round holes are embedded with first ball bearings. The two round rods are provided with spiral grooves. The first ball bearings are slidably connected to the inner walls of the corresponding spiral grooves. The inclination angle of the spiral grooves is 55°-65°. The two round rods move downward from the two round holes. Because the two first ball bearings are slidably connected to the inner walls of the two spiral grooves, the two round rods rotate while moving downward.

[0015] Preferably, four vertical guide rods are fixedly installed at the bottom of the connecting plate. The four vertical guide rods are arranged symmetrically in pairs. Two extrusion blocks are symmetrically arranged below the connecting plate. Two vertical guide grooves are opened on the top of each extrusion block. The vertical guide rods are slidably connected to the inner wall of the vertical guide grooves to ensure that the extrusion blocks can only move vertically.

[0016] Preferably, the extrusion block has a through hole, the round rod cooperates with the through hole, and a second ball is embedded in the inner wall of the through hole. The second ball is slidably connected to the inner wall of the spiral groove. When the round rod rotates, the extrusion block moves vertically through the cooperation of the second ball and the spiral groove.

[0017] Preferably, both sides of the extrusion block are provided with extrusion inclined surfaces, and the top of the light-shielding box is provided with a force-receiving inclined surface. The extrusion inclined surfaces and the force-receiving inclined surfaces cooperate with each other. The two extrusion blocks are extruded by the two extrusion inclined surfaces and the two force-receiving inclined surfaces, so that the two light-shielding boxes are close to each other and in contact. The monofilament is located between the two semi-circular wire holes, and is protected by the action of the two light-shielding boxes.

[0018] Compared with the prior art, the beneficial effects that this invention can achieve are: The single filament conveying mechanism in this device is used to convey single filaments. When single filament detection is required, the servo motor drives the threaded rod to rotate, the threaded rod drives the moving block to move, and the moving block drives the light-shielding single filament detection mechanism to move directly above the single filament through the n-type frame, so as to achieve the purpose of adjusting the single filament detection position. Multiple sets of single filaments can be detected. This device uses two pusher motors to drive the light-shielding box support bar downwards. The light-shielding box support bar moves the two light-shielding boxes between the monofilaments. At the same time, the light-shielding box support bar drives the two round rods downwards. The two round rods move downwards through the two round holes. Because the two first ball bearings are slidably connected to the inner walls of the two spiral grooves, the two round rods rotate as they move downwards. When the two round rods rotate, they drive the two extrusion blocks downwards through the cooperation of the two spiral grooves and the two second ball bearings. The vertical guide rod is slidably connected to the inner wall of the vertical guide groove to ensure that the extrusion blocks can only move vertically. The two extrusion blocks are squeezed by the two extrusion inclined surfaces and the two force inclined surfaces, so that the two light-shielding boxes approach each other and make contact. The monofilament is located between the two semi-circular wire holes. Through the function of the two light-shielding boxes, the monofilament can be shielded from light during detection to prevent external light from affecting the detection effect. Two illumination lamps illuminate the monofilament, and the linear camera takes pictures of the monofilament for detection. After the device completes the detection of one monofilament, the two push rod motors work in opposite directions, causing the light-shielding box support bar to move upward, the two round rods to rotate in opposite directions, and the two pressing blocks to move away from the two light-shielding boxes. The reset spring provides a reset force to the slider, causing the two sliders to drive the two light-shielding boxes away from each other and reset. The detection position adjustment mechanism adjusts the position of the light-shielding monofilament detection mechanism to detect other monofilaments.

[0019] This invention allows a single detection device to detect multiple sets of monofilaments under the same working conditions by adjusting the detection position. When the device is close to the monofilament for detection, it can automatically wrap the monofilament to avoid the influence of external light and improve the accuracy of the detection results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a bottom-view structural diagram of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a bottom view of the detection position adjustment mechanism, the light-shielding monofilament detection mechanism, and related parts of the present invention. Figure 5 This is a bottom view schematic diagram of the detection position adjustment mechanism of the present invention; Figure 6 This is a structural schematic diagram of the n-type frame, connecting plate, push rod motor, light shield box support bar, round rod and related parts of the present invention; Figure 7 This is a bottom view of the n-type frame, connecting plate, push rod motor, light shield support bar, linear camera, lighting lamp, round rod and related parts of the present invention. Figure 8This is a structural schematic diagram of the n-type frame, connecting plate, push rod motor, light shielding box support strip and related parts of the present invention; Figure 9 This is a perspective structural diagram of the n-type frame, connecting plate, push rod motor, light shielding box support strip and related parts of the present invention; Figure 10 This is a schematic diagram of the structure of the round rod, vertical guide rod, extrusion block and related parts of the present invention; Figure 11 This is a perspective structural diagram of the round rod, vertical guide rod, extrusion block and related parts of the present invention; Figure 12 This is a perspective structural diagram of the extrusion block of the present invention; Figure 13 This is a structural schematic diagram of the light-shielding box and related parts of the present invention; Figure 14 For the present invention Figure 13 A side view structural diagram.

[0021] The components include: 1. Working plate; 11. Support leg; 12. Support rod; 13. Top plate; 2. Single filament conveying mechanism; 21. Bracket; 22. Conveying roller; 3. Single filament; 4. Distribution box; 41. Box cover; 42. Controller; 5. Detection position adjustment mechanism; 51. Fixing plate; 52. Guide groove; 53. Guide block; 54. Screw groove; 55. Threaded rod; 56. Moving block; 57. Servo motor; 58. N-type frame; 6. Light-shielding single filament detection mechanism; 61. Connecting plate; 611. Round hole; 612. First 62. Ball bearing; 63. Push rod motor; 64. Light shield support bar; 65. Slide groove; 66. Return spring; 67. Light shield box; 68. Semicircular wire hole; 69. Rectangular slide hole; 60. Slider; 61. Force-bearing inclined surface; 62. Adaptive inclined surface; 63. Extrusion block; 64. Through hole; 65. Second ball bearing; 66. Extrusion inclined surface; 67. Vertical guide groove; 68. Vertical guide rod; 69. Round rod; 60. Limiting piece; 61. Spiral slide groove; 72. Linear camera; 73. Lighting lamp. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified. Example

[0023] likeFigure 1 — Figure 9 As shown, this invention provides an online quality inspection device for polyethylene monofilaments, including a working plate 1, a power distribution box 4, a controller 42, multiple sets of monofilament conveying mechanisms 2, a detection position adjustment mechanism 5, and a light-shielding monofilament detection mechanism 6. The working plate 1 has four support legs 11 at its bottom, each with a hollow rubber pad at its bottom. Four support rods 12 are fixedly installed on the top of the working plate 1, and a single top plate 13 is mounted on the top of each of the four support rods 12. The power distribution box 4 and controller 42 are located on the top of the working plate 1. The power distribution box 4 houses an image processing system, and a cover 41 is rotatably mounted on the side of the power distribution box 4. Monofilaments 3 are conveyed on the multiple sets of monofilament conveying mechanisms 2. The detection position adjustment mechanism 5 is located at the bottom of the top plate 13 and is used to adjust the detection position of the monofilaments 3. The light-shielding monofilament detection mechanism 6 is installed at the bottom of the detection position adjustment mechanism 5 and is used to perform light-shielding detection on the monofilaments 3.

[0024] Specifically, the image centralized processing system includes an industrial control computer, a power module, a display screen, a printer, an Ethernet converter, and a control board. The image centralized processing system is the prior art proposed in the comparative document, and the multiple sets of single-filament conveying mechanisms 2 are at least three sets.

[0025] like Figure 1 , Figure 3 As shown, in this embodiment, the monofilament conveying mechanism 2 includes two sets of supports 21, each set of supports 21 consists of two parts, and two conveying rollers 22 are rotatably installed between each set of supports 21. The two conveying rollers 22 are used to convey the monofilament 3, and the two conveying rollers 22 are made of rubber or plastic.

[0026] like Figure 4 , Figure 5 As shown, in this embodiment, the detection position adjustment mechanism 5 includes a fixed plate 51, which is fixedly installed at the bottom center of the top plate 13. A screw groove 54 is provided at the bottom of the fixed plate 51, and a threaded rod 55 is rotatably installed in the screw groove 54. A moving block 56 is threadedly connected to the outside of the threaded rod 55, and a servo motor 57 is installed on the outside of the threaded rod 55. The servo motor 57 is installed on the outside of the fixed plate 51. An n-shaped frame 58 is fixedly installed at the bottom of the moving block 56. The light-shielding single-wire detection mechanism 6 is fixedly connected to the n-shaped frame 58. Two guide grooves 52 are provided at the bottom of the fixed plate 51, and guide blocks 53 are slidably installed in both guide grooves 52. Both guide blocks 53 are fixedly installed to the top of the n-shaped frame 58 to ensure that the n-shaped frame 58 can move stably at the bottom of the fixed plate 51.

[0027] Specifically, at least three limit sensors are added to the bottom of the fixing plate 51, and the three limit sensors cooperate with three sets of monofilament conveying mechanisms 2 to limit the movement of the light-shielding monofilament detection mechanism 6 to directly above the monofilament 3.

[0028] like Figure 7 As shown, in this embodiment, the light-shielding monofilament detection mechanism 6 includes a connecting plate 61, which is fixedly installed with the n-shaped frame 58. Two push rod motors 62 are fixedly installed at the bottom of the connecting plate 61. The two push rod motors 62 are symmetrically arranged. The output ends of the two push rod motors 62 are equipped with the same light-shielding box support bar 63. A linear camera 7 is arranged at the bottom center of the light-shielding box support bar 63. Two lighting lamps 71 are installed at the bottom of the light-shielding box support bar 63. The two lighting lamps 71 are symmetrically arranged on both sides of the linear camera 7.

[0029] In this embodiment, the working method is as follows: When in use, the power supply and controller 42 are turned on. The single filament conveying mechanism 2 is used to convey the single filament 3. When single filament detection is required, the servo motor 57 drives the threaded rod 55 to rotate. The threaded rod 55 drives the moving block 56 to move. The moving block 56 drives the light-shielding single filament detection mechanism 6 to move directly above the single filament 3 through the n-shaped frame 58. The two push rod motors 62 push the light-shielding box support bar 63 to move downward. The light-shielding box support bar 63 is used to block the light from above. The two lighting lamps 71 illuminate the single filament 3. The linear camera 7 takes pictures of the single filament 3 for detection and transmits the images to the image centralized processing system for detection (the detection method is the same as the image comparison detection method in the comparison file CN213658599U). Example

[0030] like Figure 6 — Figure 14 As shown, this embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figure 2 , Figure 3 As shown, to better realize the present invention, the following configuration is specifically adopted: In this embodiment, the light-shielding monofilament detection mechanism 6 further includes two light-shielding boxes 64. The two light-shielding boxes 64 are symmetrically slidably installed on the outer side 63 of the light-shielding box support bar. The inner side of the two light-shielding boxes 64 is provided with a semi-circular wire hole 641. The two semi-circular wire holes 641 are combined into a wire hole for conveying the monofilament 3. The bottom of the light-shielding box 64 is provided with an adapting inclined surface 645 to facilitate the insertion of the light-shielding box 64 between the two monofilaments 3. The light-shielding box 64 is provided with a rectangular sliding hole 642. The inner walls of the two sides of the rectangular sliding hole 642 are fixedly installed with sliders 643. The two sides of the light-shielding box support bar 63 are provided with two sliding grooves 631. The inner walls of the four sliding grooves 631 are provided with return springs 632. The sliders 643 are slidably connected to the inner walls of the corresponding sliding grooves 631 and fixedly installed with the corresponding return springs 632.

[0031] like Figure 6 — Figure 9 As shown, in this embodiment, two round rods 66 are symmetrically mounted on the top of the light-shielding box support bar 63 via bearings. The two round rods 66 are located on the outside of the two light-shielding boxes 64. Limiting pieces 661 are fixedly installed on the top of each of the two round rods 66. Two round holes 611 are opened on the connecting plate 61. The two round rods 66 cooperate with the two round holes 611. The inner walls of the two round holes 611 are embedded with first ball bearings 612. The two round rods 66 are provided with spiral grooves 662. The first ball bearings 612 are slidably connected to the inner walls of the corresponding spiral grooves 662. The inclination angle of the spiral grooves 662 is 55°-65°.

[0032] Specifically, the purpose of the inclination angle of the spiral groove 662 being 55°-65° is to ensure that the two round rods 66 move downward from the two round holes 611. Since the two first balls 612 are slidably connected to the inner walls of the two spiral grooves 662, the two round rods 66 rotate while moving downward.

[0033] like Figure 10 — Figure 12 As shown, in this embodiment, four vertical guide rods 655 are fixedly installed at the bottom of the connecting plate 61. The four vertical guide rods 655 are arranged symmetrically in pairs. Two extrusion blocks 65 are symmetrically arranged below the connecting plate 61. Two vertical guide grooves 654 are opened at the top of each of the two extrusion blocks 65. The vertical guide rods 655 are slidably connected to the inner wall of the vertical guide grooves 654 to ensure that the extrusion blocks 65 can only move vertically.

[0034] like Figure 10 — Figure 14 As shown, in this embodiment, the extrusion block 65 has a through hole 651, and the round rod 66 cooperates with the through hole 651. The inner wall of the through hole 651 is embedded with a second ball bearing 652, and the second ball bearing 652 is slidably connected to the inner wall of the spiral groove 662. When the round rod 66 rotates, the extrusion block 65 moves vertically through the cooperation of the second ball bearing 652 and the spiral groove 662. Both sides of the extrusion block 65 are provided with extrusion inclined surfaces 653, and the top of the light shield box 64 is provided with a force-receiving inclined surface 644. The extrusion inclined surface 653 cooperates with the force-receiving inclined surface 644. The two extrusion blocks 65 are pressed by the two extrusion inclined surfaces 653 and the two force-receiving inclined surfaces 644, so that the two light shield boxes 64 approach each other and contact each other. The monofilament 3 is located between the two semicircular wire holes 641, and is protected by the action of the two light shield boxes 64.

[0035] In this embodiment, the working method is as follows: The light-shielding box support bar 63 drives the two light-shielding boxes 64 to move downwards between the monofilaments 3. At the same time, the light-shielding box support bar 63 drives the two round rods 66 to move downwards. The two round rods 66 move downwards through the two round holes 611. Since the two first ball bearings 612 are slidably connected to the inner walls of the two spiral grooves 662, the two round rods 66 rotate while moving downwards. When the two round rods 66 rotate, they drive the two extrusion blocks 65 to move downwards through the cooperation of the two spiral grooves 662 and the two second ball bearings 652. Through the slidable connection between the vertical guide rod 655 and the inner wall of the vertical guide groove 654, it is ensured that the extrusion blocks 65 can only move vertically. The two extrusion blocks 65 are pressed by the two extrusion inclined surfaces 653 and the two force-bearing inclined surfaces 644, so that the two light-shielding boxes 64 approach each other and make contact. The monofilament 3 is located between the two semi-circular wire holes 641. Through the action of the two light-shielding boxes 64, the monofilament 3 can be shielded from light during detection, avoiding external light from affecting the detection effect. After one monofilament 3 is detected, the two push rod motors 62 work in opposite directions, causing the light shield box support bar 63 to move upward, the two round rods 66 to rotate in opposite directions, and the two pressing blocks 653 to move away from the two light shield boxes 64. The reset spring 632 provides a reset force to the slider 643, causing the two sliders 643 to drive the two light shield boxes 64 to move away from each other and reset. The detection position adjustment mechanism 5 adjusts the position of the light shield monofilament detection mechanism 6 to detect the other monofilament 3.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online quality testing device for polyethylene monofilament, characterized in that: include: The work plate (1) has four support legs (11) at the bottom. Each of the four support legs (11) has a rubber pad at the bottom. The rubber pad has a hollow structure. The top of the work plate (1) has four support rods (12) fixedly installed. The top of the four support rods (12) has the same top plate (13). The distribution box (4) and controller (42) are set on the top of the work plate (1). The distribution box (4) is equipped with an image centralized processing system. The side of the distribution box (4) is rotatably mounted with a box cover (41). Multiple sets of single filament conveying mechanisms (2) are provided, and single filaments (3) are conveyed. The single filament conveying mechanism (2) is used to convey the single filaments (3). The detection position adjustment mechanism (5) is set at the bottom of the top plate (13) and is used to adjust the detection position of the monofilament (3); The light-shielding monofilament detection mechanism (6) is installed at the bottom of the detection position adjustment mechanism (5) and is used to perform light-shielding detection on the monofilament (3).

2. The online quality testing equipment for polyethylene monofilament according to claim 1, characterized in that: The monofilament conveying mechanism (2) includes two sets of supports (21), each set of supports (21) consists of two parts, and two conveying rollers (22) are rotatably installed between each set of supports (21). The two conveying rollers (22) are used to convey the monofilament (3).

3. The online quality testing equipment for polyethylene monofilament according to claim 1, characterized in that: The detection position adjustment mechanism (5) includes a fixed plate (51), which is fixedly installed at the bottom center of the top plate (13). A screw groove (54) is provided at the bottom of the fixed plate (51). A threaded rod (55) is rotatably installed in the screw groove (54). A moving block (56) is threadedly connected to the outside of the threaded rod (55). A servo motor (57) is installed on the outside of the threaded rod (55). The servo motor (57) is installed on the outside of the fixed plate (51). An n-type frame (58) is fixedly installed at the bottom of the moving block (56). The light-shielding single filament detection mechanism (6) is fixedly connected to the n-type frame (58).

4. The online quality testing equipment for polyethylene monofilament according to claim 3, characterized in that: The bottom of the fixed plate (51) has two guide grooves (52), and guide blocks (53) are slidably installed in both guide grooves (52). Both guide blocks (53) are fixedly installed to the top of the n-shaped frame (58).

5. The online quality testing equipment for polyethylene monofilament according to claim 1, characterized in that: The light-shielding monofilament detection mechanism (6) includes a connecting plate (61), which is fixedly installed with an n-shaped frame (58). Two push rod motors (62) are fixedly installed at the bottom of the connecting plate (61). The two push rod motors (62) are symmetrically arranged. The output ends of the two push rod motors (62) are equipped with the same light-shielding box support bar (63). A linear camera (7) is set at the bottom center of the light-shielding box support bar (63). Two lighting lamps (71) are installed at the bottom of the light-shielding box support bar (63). The two lighting lamps (71) are symmetrically arranged on both sides of the linear camera (7).

6. The online quality testing equipment for polyethylene monofilament according to claim 5, characterized in that: Two light shield boxes (64) are symmetrically slidably installed on the outer side of the light shield box support bar (63). The inner side of each light shield box (64) is provided with a semi-circular wire hole (641). The two semi-circular wire holes (641) are combined into one wire hole for the transmission of the monofilament (3). The bottom of the light shield box (64) is provided with an adapting inclined surface (645) to facilitate the insertion of the light shield box (64) between the two monofilaments (3).

7. The online quality testing equipment for polyethylene monofilament according to claim 6, characterized in that: The light shield box (64) has a rectangular sliding hole (642). A slider (643) is fixedly installed on the inner wall of both sides of the rectangular sliding hole (642). Two sliding grooves (631) are opened on both sides of the light shield box support bar (63). A return spring (632) is provided on the inner wall of each of the four sliding grooves (631). The slider (643) is slidably connected to the inner wall of the corresponding sliding groove (631) and fixedly installed with the corresponding return spring (632).

8. The online quality testing equipment for polyethylene monofilament according to claim 5, characterized in that: The top of the light-shielding box support bar (63) is symmetrically mounted with two round rods (66) via bearings. The two round rods (66) are located on the outside of the two light-shielding boxes (64). Limiting plates (661) are fixedly installed on the top of the two round rods (66). Two round holes (611) are opened on the connecting plate (61). The two round rods (66) cooperate with the two round holes (611). The inner walls of the two round holes (611) are embedded with first ball bearings (612). The two round rods (66) are provided with spiral grooves (662). The first ball bearings (612) are slidably connected to the inner walls of the corresponding spiral grooves (662). The inclination angle of the spiral grooves (662) is 55°-65°.

9. The online quality testing equipment for polyethylene monofilament according to claim 5, characterized in that: Four vertical guide rods (655) are fixedly installed at the bottom of the connecting plate (61). The four vertical guide rods (655) are arranged symmetrically in pairs. Two extrusion blocks (65) are symmetrically arranged below the connecting plate (61). Two vertical guide grooves (654) are opened on the top of each extrusion block (65). The vertical guide rods (655) are slidably connected to the inner wall of the vertical guide grooves (654) to ensure that the extrusion blocks (65) maintain vertical movement.

10. The online quality testing equipment for polyethylene monofilament according to claim 9, characterized in that: The extrusion block (65) has a through hole (651), and the round rod (66) cooperates with the through hole (651). The inner wall of the through hole (651) is embedded with a second ball (652). The second ball (652) is slidably connected with the inner wall of the spiral groove (662). Both sides of the extrusion block (65) are provided with extrusion inclined surfaces (653). The top of the light shield box (64) is provided with a force-bearing inclined surface (644). The extrusion inclined surface (653) cooperates with the force-bearing inclined surface (644).

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