A device for detecting surface defects of cables

Abstract

The present invention discloses a device for detecting cable surface defects, belonging to the field of cable detection technology. The device comprises a vertical extrusion device, a transverse extrusion device, a wiping device, a wire feeding assembly, an ultraviolet detection device, and a cable reeling device, which are sequentially arranged in the longitudinal direction of the cable. The vertical slider slidably engages with a first frame, and the transverse extrusion device comprises two parallel vertical extrusion rollers, transverse sliders mounted at both ends of the vertical extrusion rollers, and a transverse displacement drive device for controlling the transverse displacement of the transverse sliders. The transverse sliders slidably engage with a second frame. The transverse extrusion rollers and the vertical extrusion rollers have the same structure, each comprising a hollow roller body and a rotating drum rotatably disposed within the roller body. The roller body has an opening on the side facing the cable, and one end of the roller body is formed with an infusion channel connected to the rotating drum, which is provided with a liquid spray port. The detection device of the present invention can improve the accuracy of defect detection.

Description

Technical Field

[0001] The invention belongs to the technical field of cable detection, and in particular relates to a device for detecting surface defects of cables. Background Art

[0002] When conducting quality inspection on wires and cables, it is necessary to first conduct a comprehensive inspection of their appearance. The inspection of the appearance and size of wires and cables is the first inspection item for the quality control of wires and cables, so as to ensure whether the surface of the cable is round and smooth, and whether there are defects such as burrs, cracks, spots, and oil stains that affect normal use. There are some devices for detecting cable surface defects in the prior art, such as a cable surface defect detection device disclosed in CN214150483U. The device is stained with fluorescent liquid through the through channel of the fluorescent box. The fluorescent liquid can be filled into the surface defects of the cable. The cable enters the through channel. The surface defects of the cable show yellow-green fluorescent spots or stripes under the irradiation of ultraviolet light, thereby discovering and judging the location of the cable defect. However, the existing cable surface usually adopts an elastic sheath. Some crack-type defects are in a closed state under the elastic force of the sheath itself. The fluorescent liquid cannot smoothly enter the crack, resulting in inaccurate detection results. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a device for detecting cable surface defects, which can improve the accuracy of defect detection.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention discloses a device for detecting surface defects of cables, comprising a vertical extrusion device, a transverse extrusion device, a wiping device, a wire feeding assembly, an ultraviolet detection device and a cable winding device, which are sequentially arranged in the longitudinal direction of the cable, the transverse extrusion device and the vertical extrusion device are respectively used to extrude the cable vertically and transversely; the vertical extrusion device comprises two parallel transverse extrusion rollers, vertical sliders installed at both ends of the transverse extrusion rollers, and a vertical displacement driving device for controlling the vertical displacement of the vertical sliders, the vertical sliders being slidably fitted on a first frame, the transverse extrusion device comprises two parallel vertical extrusion rollers, transverse sliders installed at both ends of the vertical extrusion rollers, and a transverse displacement driving device for controlling the transverse displacement of the transverse sliders, the transverse sliders being slidably fitted on a second frame; the transverse extrusion rollers and the vertical extrusion rollers have the same structure, both comprising a hollow roller body and a rotating drum rotatably arranged in the roller body, the roller body having an opening facing the side where the cable is located, one end of the roller body being formed with an infusion channel connected to the rotating drum, and the rotating drum being provided with a liquid spraying port.

[0006] Furthermore, the rotating drum includes a cylinder body and a flexible cylinder coaxially arranged in the middle of the cylinder body. The cylinder body is rotatably fitted in the roller body. A liquid spraying slot is opened on the flexible cylinder. The flexible cylinder is deformed after contacting the cable. The liquid spraying slot is formed after the flexible cylinder is pulled and deformed to form the liquid spraying port.

[0007] Furthermore, the liquid spraying slot extends toward the cable.

[0008] Furthermore, the rotating drum is coaxially connected to a rotating shaft, and the rotating shaft is connected to a motor via a universal shaft.

[0009] Furthermore, the first frame is slidably mounted on a rail, and the second frame is provided with a longitudinal displacement driving device capable of driving the first frame to move longitudinally.

[0010] Furthermore, the wire feeding assembly includes a base, a guide rail installed on the base and extending longitudinally, a slide is installed in the guide rail along the longitudinal sliding direction, a conical hole and a cylindrical hole are sequentially provided in the center of the slide, a stopper is installed at one end of the slide away from the conical hole, a center column is coaxially installed in the cylindrical hole, a plurality of ball grooves are opened at one end of the center column along the circumferential direction, balls are rolled and embedded in the ball grooves, the surface of the balls abuts against the inner wall of the conical hole, and the center column is slidably installed in the center hole opened on the stopper; a reciprocating displacement device for controlling the back and forth displacement of the slide is installed on the base.

[0011] Furthermore, a through hole is provided on the base, and the wiping device includes a rotating tube installed in the through hole and fan-shaped rubber blocks evenly distributed on the inner wall of the rotating tube. The fan-shaped rubber blocks are tightly fitted along the circumference, and the inner side of the fan-shaped rubber blocks forms an arc surface corresponding to the cable.

[0012] Furthermore, the rotating tube is threadedly installed in the through hole, the end face of the rotating tube is connected to the limiting block through a support rod, the support rod is rotatably fitted in the annular groove opened at the end of the slide seat, and the limiting block is limited by the annular groove.

[0013] Furthermore, a triangular groove is formed on the inner side of the guide rail, and triangular protrusions that match the triangular groove are formed on both sides of the slide seat.

[0014] The beneficial effects of the present invention are:

[0015] The present invention discloses a device for detecting cable surface defects. If cracks exist on the left and right sides of a cable, a vertical extrusion device is provided. During cable inspection, the vertical upper and lower sides of the cable can be squeezed. Under the elastic action of the cable sheath itself, the left and right sides of the cable can expand and deform outward, thereby magnifying the defects on the left and right sides of the cable. Similarly, the horizontal extrusion device can magnify defects on the upper and lower sides of the cable. After the defects are magnified and expanded, fluorescent liquid can more easily enter the defects, making subsequent fluorescent detection and judgment more sensitive, thereby improving the accuracy of defect detection.

[0016] In the device disclosed in the present invention, a rotating drum is provided on the inner side of the squeezing roller. When the rotating drum rotates, fluorescent liquid can be sprayed onto the cable surface through the liquid spray port. Since the spraying position just avoids the squeezing position, the waste of fluorescent liquid can be reduced while ensuring the coverage.

[0017] In the detection device disclosed in the present invention, after the sprayed fluorescent liquid is wiped by the wiping device, part of the fluorescent liquid can be retained in the defect, which can facilitate the detection and judgment of fluorescence. The device is easy to use and greatly improves the accuracy of detection.

[0018] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a structural schematic diagram of the detection device of the present invention;

[0021] Figure 2 It is a side view of the detection device of the present invention;

[0022] Figure 3 It is a structural diagram of the wire feeding component;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 is a cross-sectional view of the transverse extrusion roller;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0026] The markings in the accompanying drawings are as follows: cable 1, vertical extrusion device 2, horizontal extrusion device 3, wiping device 4, wire feeding assembly 5, UV detection device 6, cable winding device 7, horizontal extrusion roller 8, vertical slider 9, vertical displacement drive device 10, first frame 11, vertical extrusion roller 12, horizontal slider 13, horizontal displacement drive device 14, second frame 15, roller body 16, opening 17, infusion channel 18, cylinder body 19, flexible cylinder 20, spray gap 21, rotating shaft 22, universal shaft 23, motor 24, track 25, longitudinal displacement drive device 26, base 27, guide rail 28, slide 29, tapered hole 30, cylindrical hole 31, stop block 32, center column 33, ball groove 34, ball 35, center hole 36, through hole 37, rotating tube 38, fan-shaped rubber block 39, support rod 40, annular groove 41, triangular groove 42, triangular protrusion 43. DETAILED DESCRIPTION

[0027] like Figures 1 to 6 As shown, the present invention discloses a device for detecting surface defects of a cable, comprising a vertical extrusion device 2, a transverse extrusion device 3, a wiping device 4, a wire feeding assembly 5, an ultraviolet detection device 6 and a cable reeling device 7, which are sequentially arranged along the longitudinal direction of the cable 1. The cable 1 is fed along its extension direction. The transverse extrusion device 3 and the vertical extrusion device 2 are used to extrude the cable 1 vertically and transversely, respectively. Under the power of the wire feeding assembly 5, fluorescent liquid can also be sprayed on the surface of the cable 1 through the transverse extrusion device 3 and the vertical extrusion device 2. The spraying position avoids the extrusion position, thereby reducing the waste of fluorescent liquid. After the extrusion spraying is completed and wiped by the wiping device 4, some fluorescent liquid can be retained in the defect. Under the irradiation of the ultraviolet detection device 6, the fluorescence detection and judgment can be facilitated. The device is easy to use and greatly improves the accuracy of the detection. The cable 1 after being detected is reeled by the cable reeling device 7, which can be convenient for the next detection or use. Under the tensioning action of the cable reeling device 7, the tension of the cable 1 during detection can also be guaranteed, which can be more convenient for detection.

[0028] In some other embodiments, the spraying of the fluorescent liquid can also be achieved by manual spraying, but the manual method will undoubtedly increase the labor intensity. The manual spraying method can control the angle and amount of the spraying, and then inspect the defect position after spraying, which can improve the smoothness of the detection.

[0029] Among them, the vertical extrusion device 2 disclosed in the present invention includes two parallel horizontal extrusion rollers 8, vertical sliders 9 installed at both ends of the horizontal extrusion rollers 8, and a vertical displacement driving device 10 for controlling the vertical displacement of the vertical slider 9. The vertical slider 9 is slidably fitted on the first frame, and the first frame provides support for the whole. The extension direction of the cable 1 is the longitudinal direction. The vertical displacement driving device 10 adopts a hydraulic cylinder, which can push the slider to slide vertically. The axis of the horizontal extrusion roller 8 is arranged horizontally, so that the upper and lower sides of the cable 1 can be squeezed, driving the surface sheath of the cable 1 to be compressed and deformed in the vertical direction. After the cable 1 is elastically deformed, the left and right sides of the cable 1 can expand and deform outward, thereby magnifying the defects on the left and right sides of the cable 1, making it convenient for detection after the fluorescent liquid enters.

[0030] Similarly, the transverse extrusion device 3 comprises two parallel vertical extrusion rollers 12, transverse sliders 13 mounted at either end of the vertical extrusion rollers 12, and a transverse displacement drive 14 for controlling the transverse displacement of the transverse sliders 13. The transverse sliders 13 are slidably engaged with a second frame 15. The transverse displacement drive utilizes a hydraulic cylinder to propel the sliders in a transverse direction. The axis of the transverse extrusion rollers 8 is arranged vertically, allowing for extrusion of both the left and right sides of the cable 1. The transverse extrusion device 3 and the vertical extrusion device 2 allow for comprehensive testing of the entire circumference of the cable 1.

[0031] The horizontal squeezing roller 8 and the vertical squeezing roller 12 have the same structure, both comprising a hollow roller body 16 and a rotating drum rotatably disposed within the roller body 16. The roller body 16 has an opening 17 on the side facing the cable 1. One end of the roller body 16 is formed with an infusion channel 18 connected to the drum. The infusion channel 18 is connected to a fluorescent liquid input source, and the drum can provide a continuous supply of fluorescent liquid through the infusion channel 18. The drum is provided with a liquid spray port. When the drum rotates, the fluorescent liquid can be sprayed onto the surface of the cable 1 through the liquid spray port, achieving an automatic liquid spraying effect. Since the spraying position just avoids the squeezing position, it can reduce the waste of fluorescent liquid while ensuring the coverage.

[0032] In this embodiment, the rotating drum includes a drum body 19 and a flexible drum 20 coaxially disposed in the middle of the drum body 19. The drum body 19 is rotatably engaged within the roller body 16. The flexible drum 20 is provided with a liquid spraying slit 21. The flexible drum 20 deforms upon contact with the cable 1. The liquid spraying slit 21 forms a rear liquid spraying port after the flexible drum 20 is pulled and deformed. By providing the flexible drum 20, when the cable 1 is squeezed, the flexible drum 20 can also undergo a corresponding deformation. In this case, the liquid spraying port can be automatically formed after the flexible drum 20 is deformed. After the squeezing is completed, the flexible drum 20 can return to its original position, and the liquid spraying port returns to the state of the liquid spraying slit 21, which can be automatically closed and more convenient to use.

[0033] In this embodiment, the direction of the liquid spraying slot 21 extends toward the cable 1, allowing the fluorescent liquid to be sprayed in the position corresponding to the deformation of the cable 1, thereby reducing fluorescent liquid waste. The rotating drum is coaxially connected to the rotating shaft 22, which is connected to the motor 24 via the universal shaft 23. The motor 24 can provide rotational power to the rotating drum, ensuring more complete spraying of the fluorescent liquid.

[0034] In this embodiment, the first frame is slidably mounted on the rail 25, and the second frame 15 is equipped with a longitudinal displacement driving device 26 capable of driving the first frame to move longitudinally. When a cable 1 is finished, the tail end of the cable 1 is located at the position of the first frame. During the continuous transportation of the cable 1, the first frame can be moved along with the cable 1, thereby facilitating the detection of the length of the tail end of the cable 1 and avoiding the problem of inadequate detection. After the detection is completed, the longitudinal displacement driving device 26 is activated to drive the first frame away from the second frame 15, avoiding the problem of unstable cable 1 detection caused by the mutual influence between the two extrusion devices. Under the synergistic action of the two extrusion devices, a greater tension can also be provided to the cable 1, making the detection process smoother.

[0035] In this embodiment, the wire feeding assembly 5 includes a base 27, a guide rail 28 mounted on the base 27 and extending longitudinally, a slide 29 slidably mounted in the guide rail 28 along the longitudinal direction, the center of the slide 29 being sequentially provided with a tapered hole 30 and a cylindrical hole 31, a stopper 32 being mounted at one end of the slide 29 away from the tapered hole 30, a center column 33 being coaxially mounted in the cylindrical hole 31, one end of the center column 33 being provided with a plurality of ball grooves 34 circumferentially defined, balls 35 rollingly engaged in the ball grooves 34, the surfaces of the balls 35 abutting against the inner wall of the tapered hole 30, and the center column 33 being slidably mounted in a center hole 36 defined in the stopper 32; a reciprocating displacement device for controlling the back-and-forth displacement of the slide 29 is mounted on the base 27. The reciprocating displacement device utilizes a gear rack, a motor 24 mounted on the slide 29, and a rack mounted on the guide rail 28 and the base 27. The motor 24 drives the gears to rotate, thereby driving the slide 29 to move back and forth along the guide rail 28.

[0036] Specifically, during operation, when the reciprocating displacement device drives the slide 29 toward the side away from the base 27, the tapered hole 30 can act on the ball 35, causing the ball 35 to press against the cable 1 in the center through the ball groove 34. After being pressed by the three balls 35, the cable 1 can be displaced along the side away from the base 27 along with the balls 35 and the center column 33, thereby conveying the cable 1. When the reciprocating displacement device drives the slide 29 toward the side closer to the base 27, since the tapered hole 30 no longer acts on the ball 35, the ball 35 releases the cable 1, and the center column 33 retracts backward under the action of the block 32, waiting for the next conveying stroke to start. The present invention uses a gear rack for conveying control, making control more convenient. Of course, in some other embodiments, the reciprocating displacement device can use a combination of a pneumatic cylinder, a hydraulic cylinder, a linear motor 24, or other linear motion devices, as will be understood by those skilled in the art.

[0037] In this embodiment, a through hole 37 is formed in the base 27, and the wiping device 4 includes a rotating tube 38 installed in the through hole 37 and fan-shaped rubber blocks 39 evenly distributed around the inner wall of the rotating tube 38. The fan-shaped rubber blocks 39 are tightly fitted along the circumference, and the inner sides of the fan-shaped rubber blocks 39 form an arc-shaped surface corresponding to the cable 1. Because the fan-shaped rubber blocks 39 are tightly fitted to the cable 1 along the circumference, when the two move relative to each other, the fan-shaped rubber blocks 39 can scrape off the fluorescent liquid on the surface of the cable 1, thus performing a wiping function. Because the fan-shaped rubber blocks 39 are flexible, they will not scratch the surface of the cable 1 or scrape off the fluorescent liquid in the cracks. Using this device, the use effect is better.

[0038] The sector-shaped rubber block 39 of the present invention is composed of multiple pieces in a circumferential direction, which makes it easier to install the cable 1. When a single piece is worn, it can also be easily replaced to avoid affecting the wiping effect.

[0039] In this embodiment, a rotating tube 38 is threadedly mounted within the through hole 37. The end surface of the rotating tube 38 is connected to a limit block via a support rod 40. The support rod 40 rotatably engages within an annular groove 41 formed at the end of the slide 29, and the limit block is restrained by the annular groove 41. By adopting this arrangement, when the slide 29 moves, the support rod 40 can be used to pull the rotating tube 38 into position. With the cooperation of the threads, the rotating tube 38 can simultaneously rotate after the displacement, thereby achieving a rotary wiping effect and improving the wiping effect.

[0040] In some other embodiments, the thickness of the fan-shaped rubber block 39 can be increased to increase the friction between the fan-shaped rubber block 39 and the surface of the cable 1. When the rotating tube 38 rotates, the fan-shaped rubber block 39 can drive the cable 1 to rotate a certain angle along the circumferential direction when the cable 1 is transported. At this time, the horizontal extrusion device 3 and the vertical extrusion device 2 can extrude and spray liquid at multiple circumferential positions of the cable 1, so that the defect detection on the surface of the cable 1 is more comprehensive.

[0041] In this embodiment, a triangular groove 42 is formed on the inner side of the guide rail 28 , and triangular protrusions 43 that cooperate with the triangular groove 42 are formed on both sides of the slide seat 29 , which can play a role of circumferential limiting.

[0042] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A device for detecting cable surface defects, characterized in that: The cable winding device comprises a vertical extrusion device, a transverse extrusion device, a wiping device, a wire feeding assembly, an ultraviolet detection device and a cable winding device, which are sequentially arranged in the extension direction of the cable, the transverse extrusion device and the vertical extrusion device are respectively used to extrude the cable vertically and transversely; the vertical extrusion device comprises two transverse extrusion rollers arranged in parallel, a vertical slider installed at both ends of the transverse extrusion roller, and a vertical displacement driving device for controlling the vertical displacement of the vertical slider, the vertical slider being slidably fitted on the first frame, the transverse extrusion device comprises two vertical extrusion rollers arranged in parallel, a transverse slider installed at both ends of the vertical extrusion roller, and a transverse displacement driving device for controlling the transverse displacement of the transverse slider, the transverse slider being slidably fitted on the second frame; the transverse extrusion roller and the vertical extrusion roller have the same structure, both comprising a hollow roller body and a rotating drum rotatably arranged in the roller body, the roller body having an opening facing the side where the cable is located, an infusion channel connected to the rotating drum is formed at one end of the roller body, and a liquid spraying port is provided on the rotating drum.

2. The device for detecting cable surface defects according to claim 1, characterized in that: The rotating drum includes a cylinder body and a flexible cylinder coaxially arranged in the middle of the cylinder body. The cylinder body is rotatably fitted in the roller body. A liquid spraying slot is opened on the flexible cylinder. The flexible cylinder is deformed after contacting the cable. The liquid spraying slot forms the liquid spraying port after the flexible cylinder is pulled and deformed.

3. The device for detecting cable surface defects according to claim 2, characterized in that: The liquid spraying slot extends toward the cable.

4. The device for detecting cable surface defects according to claim 3, characterized in that: The drum is coaxially connected to a rotating shaft, and the rotating shaft is connected to a motor via a universal shaft.

5. The device for detecting cable surface defects according to claim 1, characterized in that: The first frame is slidably mounted on a rail, and the second frame is provided with a longitudinal displacement driving device capable of driving the first frame to move longitudinally.

6. A device for detecting cable surface defects according to any one of claims 1 to 5, characterized in that: The wire feeding assembly includes a base, a guide rail installed on the base and extending longitudinally, a slide seat is installed in the guide rail along the longitudinal sliding direction, a conical hole and a cylindrical hole are sequentially provided in the center of the slide seat, a stop block is installed at one end of the slide seat away from the conical hole, a center column is coaxially installed in the cylindrical hole, a plurality of ball grooves are opened at one end of the center column along the circumferential direction, balls are rolled and embedded in the ball grooves, the surface of the balls abuts the inner wall of the conical hole, and the center column is slidably installed in the center hole opened on the stop block; a reciprocating displacement device for controlling the back and forth displacement of the slide seat is installed on the base.

7. The device for detecting cable surface defects according to claim 6, characterized in that: A through hole is provided on the base, and the wiping device includes a rotating tube installed in the through hole and fan-shaped rubber blocks evenly distributed on the inner wall of the rotating tube. The fan-shaped rubber blocks are tightly fitted along the circumference, and the inner side of the fan-shaped rubber blocks forms an arc surface corresponding to the cable.

8. The device for detecting cable surface defects according to claim 7, characterized in that: The rotating tube is threadedly installed in the through hole, the end face of the rotating tube is connected to the limiting block through a support rod, the support rod is rotatably fitted in the annular groove opened at the end of the slide seat, and the limiting block is limited by the annular groove.

9. The device for detecting cable surface defects according to claim 6, characterized in that: A triangular groove is formed on the inner side of the guide rail, and triangular protrusions matching the triangular groove are formed on both sides of the slide seat.

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