Covered Yarn Surface Defect Degree Detection Device and Detection Method

Abstract

The present invention belongs to the field of detection technology, and particularly relates to a surface defect degree detection device and a detection method for covered yarn. A surface defect degree detection device for covered yarn includes: a driving roller rotatably arranged on a frame for driving a yarn to move horizontally; a positioning tube arranged parallel to the driving roller below; an adjusting component sleeved on the outer wall of the positioning tube and adapted to move up and down relative to the positioning tube; wherein, the yarn passes through the gap between the adjusting component and the driving roller and then moves horizontally; if the outer diameter of the knot of the yarn is smaller than the descending threshold of the adjusting component, the knot of the yarn is adapted to pass through the gap between the adjusting component and the driving roller; if the outer diameter of the knot of the yarn is larger than the descending threshold of the adjusting component, the knot of the yarn squeezes the adjusting component to move downward, and the bottom wall of the frame limits the rotation of the adjusting component to limit the horizontal movement of the knot of the yarn. Through the setting of the adjusting component, the detection accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection, and specifically relates to the detection of the presence of defects, and particularly to a device and a method for detecting the surface defect degree of covered yarn. Background Art

[0002] After the covered yarn is produced and formed, the quality inspection of the yarn joint is a key link to ensure the finished product rate. Traditional detection systems mostly use CCD vision sensors to perform surface scanning on the running yarn, and identify the diameter mutation area through image processing algorithms. However, when the yarn passes through the detection area at a speed of ≥50 m / min, the following interferences will occur at the knotted joint:

[0003] 1. The torsion of the joint causes a change in the surface reflectance, resulting in an increase in the error of the grayscale value fluctuation.

[0004] 2. The three-dimensional spiral structure causes projection imaging distortion, resulting in an increase in the diameter measurement deviation.

[0005] 3. High-speed movement causes motion blur, resulting in a decrease in the image resolution.

[0006] The above problems lead to an increase in the missed detection rate of the yarn joint by the traditional optical detection system.

[0007] Therefore, how to avoid the problem of increasing the missed detection rate of the knotted yarn joint is a technical difficulty that needs to be urgently broken through in this field.

[0008] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered to constitute information on related technologies. Summary of the Invention

[0009] The embodiments of the present disclosure at least provide a device for detecting the surface defect degree of covered yarn and a detection method thereof.

[0010] In a first aspect, the embodiments of the present disclosure provide a device for detecting the surface defect degree of covered yarn, including:

[0011] A driving roller, which is rotatably arranged on the frame and is used to drive the yarn to move horizontally;

[0012] A positioning tube, which is arranged parallel to the driving roller below;

[0013] An adjusting component, which is sleeved on the outer wall of the positioning tube and is suitable for lifting and moving relative to the positioning tube;

[0014] Wherein, the yarn passes through the gap between the adjusting component and the driving roller and then moves horizontally;

[0015] If the outer diameter of the knotted part of the yarn is less than the descending threshold of the adjusting component, the knotted part of the yarn is suitable for passing through the gap between the adjusting component and the driving roller;

[0016] If the outer diameter of the knot of the yarn is greater than the descending threshold of the adjusting assembly, the knot of the yarn squeezes the adjusting assembly to move downward, and the bottom wall of the frame limits the rotation of the adjusting assembly to limit the horizontal movement of the knot of the yarn.

[0017] In an optional embodiment, the adjusting assembly includes: a pressure pipe sleeve, which is sleeved on the outer wall of the positioning pipe, and a plurality of first water holes are radially formed on the outer wall;

[0018] Extension pipes, two of the extension pipes are respectively arranged at both ends of the pressure pipe sleeve, the inner diameter of which is the same as that of the pressure pipe sleeve, and the outer diameter is smaller than that of the pressure pipe sleeve;

[0019] A plurality of flexible members, which extend along the axial direction of the pressure pipe sleeve, and a plurality of the flexible members are circumferentially distributed along the inner wall of the extension pipe;

[0020] Wherein, after the yarn passes through between the adjusting assembly and the driving roller, the yarn squeezes the pressure pipe sleeve to move downward;

[0021] When the pressure pipe sleeve moves downward, the extension pipes squeeze the flexible members located above the positioning pipe to be compressed and deformed; if the outer diameter of the knot of the yarn is greater than the descending threshold of the adjusting assembly, the bottom wall of the frame limits the rotation of the pressure pipe sleeve.

[0022] In an optional embodiment, a fixing pipe is respectively sleeved at both ends of the outer wall of the positioning pipe, and an accommodating cavity is provided between the fixing pipe and the positioning pipe;

[0023] The outer diameter of the fixing pipe is not greater than the outer diameter of the pressure pipe sleeve;

[0024] A sealing disc is respectively arranged at both ends of the fixing pipe.

[0025] In an optional embodiment, water is stored in the accommodating cavity, and the water level height is not greater than 1 / 3 of the diameter of the fixing pipe;

[0026] Wherein, when the pressure pipe sleeve rotates, each flexible member is successively immersed in water.

[0027] In an optional embodiment, the adjusting assembly further includes a sealing ring, and two sealing rings are respectively arranged at the ends of the extension pipe, and the sealing ring is suitable for sealing the gap between the fixing pipe and the positioning pipe.

[0028] In an optional embodiment, the flexible member includes: a water absorption strip, which is rectangular and extends along the axial direction of the extension pipe;

[0029] A protection piece, the cross section of which is "U"-shaped, the two ends of which are fixed on the inner wall of the extension pipe, and the water absorption strip is located inside the protection piece;

[0030] The inner wall of the protection piece is parallel to the outer wall of the positioning pipe;

[0031] When the pressure tube is extruded and moves downward by the yarn, the positioning tube extrudes the protection piece and the water-absorbing strip, causing compression deformation, so that the water in the water-absorbing strip flows upward through the first water hole to the yarn.

[0032] In an alternative embodiment, a plurality of flow channels are axially formed in the extension tube, and one flow channel corresponds to one water-absorbing strip;

[0033] The flow channel communicates with the first water hole and the water-absorbing strip;

[0034] When the protection piece and the water-absorbing strip are extruded and deformed, the water in the water-absorbing strip flows through the flow channel to the first water hole.

[0035] In an alternative embodiment, the water-absorbing strip is a water-absorbing sponge with a porosity of 95-97%.

[0036] In an alternative embodiment, the axis of the flow channel forms an inclined angle of 8±0.5° with the axis of the extension tube to guide the water flow to the first water hole.

[0037] In an alternative embodiment, the inner wall of the flow channel is provided with a spiral guide groove with a groove depth of 0.1-0.3 mm and a pitch that is 2-3 times the diameter of the flow channel.

[0038] In a second aspect, the embodiments of the present disclosure further provide a detection method for a detection device, and the detection method includes:

[0039] The yarn horizontally moves after passing through between the adjusting assembly and the driving roller;

[0040] If the outer diameter of the knotted part of the yarn is less than the lowering threshold of the adjusting assembly, the knotted part of the yarn is suitable for passing through the gap between the adjusting assembly and the driving roller;

[0041] If the outer diameter of the knotted part of the yarn is greater than the lowering threshold of the adjusting assembly, the knotted part of the yarn extrudes the adjusting assembly to move downward, and the bottom wall of the frame limits the rotation of the adjusting assembly to limit the horizontal movement of the knotted part of the yarn.

[0042] The beneficial effect of the present invention is that the present invention provides a surface defect degree detection device for covered yarn. Through the setting of the adjusting assembly, after the yarn passes between the driving roller and the pressure tube, the driving roller rotates to drive the yarn to move horizontally while driving the pressure tube to rotate synchronously. If the outer diameter of the knotted part of the yarn is less than the lowering threshold of the adjusting assembly, the knotted part of the yarn is suitable for passing through the gap between the adjusting assembly and the driving roller; if the outer diameter of the knotted part of the yarn is greater than the lowering threshold of the adjusting assembly, the knotted part of the yarn extrudes the adjusting assembly to move downward, and the bottom wall of the frame limits the rotation of the adjusting assembly to limit the horizontal movement of the knotted part of the yarn. Compared with the traditional optical detection method, the detection accuracy is significantly improved.

[0043] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention are realized and attained by the structure particularly pointed out in the specification and the drawings.

[0044] To make the above objectives, features, and advantages of the present invention more comprehensible, specific preferred embodiments are presented herein and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following briefly introduces the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 A perspective view of the surface defect degree detection device for covered yarn provided by an embodiment of the present disclosure;

[0047] Figure 2 A perspective view of the driving roller, positioning tube, and adjusting assembly provided by an embodiment of the present disclosure;

[0048] Figure 3 A longitudinal sectional perspective view of the positioning tube and adjusting assembly provided by an embodiment of the present disclosure;

[0049] Figure 4 A transverse sectional perspective view of the positioning tube and adjusting assembly provided by an embodiment of the present disclosure;

[0050] Figure 5 A front sectional view of the flexible member provided by an embodiment of the present disclosure.

[0051] In the figures:

[0052] 1. Driving roller;

[0053] 2. Positioning tube; 21. Fixed tube; 22. Accommodation cavity; 23. Sealing disc;

[0054] 3. Adjusting assembly; 31. Pressing wire tube; 310. First water hole; 32. Extension tube; 320. Flow channel;

[0055] 33. Flexible member; 331. Water absorption strip; 332. Protection sheet; 34. Sealing ring;

[0056] 4. Yarn;

[0057] 5. Frame;

[0058] 6. Water level. Detailed Implementation Modes

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0060] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component can be directly formed on the second component, or a third component can be interposed between the first component and the second component. In addition, in the drawings, to effectively describe the technical content, the thickness of components may be exaggerated or reduced.

[0061] In this document, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0062] The terms used herein are only for describing specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a," "an," and "the" may also be intended to include the plural forms, unless clearly stated otherwise herein. The terms "comprising," "including," and "having" are inclusive, and thus specify the presence of the specified features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an order of performance. Additional or alternative steps may be employed.

[0063] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after such phrase can be included in at least one embodiment of the present disclosure. Thus, a specific feature, structure, or characteristic can be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a specific manner.

[0064] It has been found that in the related art, after the covered yarn is produced and formed, the quality inspection of the yarn joint is a key link to ensure the yield. Traditional detection systems mostly use CCD vision sensors to perform surface scanning on the running yarn, and identify the diameter mutation area through image processing algorithms. However, when the yarn passes through the detection area at a speed of ≥50 m / min, the following interferences will occur at the knotted joint:

[0065] 1. The twisting of the joint causes a change in the surface reflectance rate, resulting in an increase in the grayscale value fluctuation error.

[0066] 2. The three-dimensional spiral structure causes projection imaging distortion, resulting in an increase in the diameter measurement deviation.

[0067] 3. High-speed movement causes motion blur, resulting in a decrease in the image resolution.

[0068] The above problems lead to an increase in the missed detection rate of the yarn joint by the traditional optical detection system.

[0069] Therefore, how to avoid the problem of increasing the missed detection rate of the knotted yarn joint is a technical difficulty that urgently needs to be broken through in this field.

[0070] Regarding the defects and their causes of the above solutions, they are all the results obtained by the inventors after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in the present disclosure by the present disclosure should all be the contributions made by the inventors to the present disclosure during the process of the present disclosure.

[0071] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0072] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0073] As shown Figures 1 to 5 in the figure, at least one embodiment provides a surface defect degree detection device for covered yarn, including: a driving roller 1 rotatably arranged on a frame 5 for driving a yarn 4 to move horizontally; a servo motor is arranged on one side of the frame 5, and the servo motor is adapted to drive the driving roller 1 to rotate circumferentially. The frame 5 has a frame structure, the driving roller 1 is parallel to the horizontal plane, and there is a gap between the outer wall of the driving roller 1 and the inner top wall of the frame 5. A positioning tube 2 is arranged parallel to the driving roller 1 below; both ends of the positioning tube 2 are fixed on the two side walls of the frame 5. An adjusting assembly 3 is sleeved on the outer wall of the positioning tube 2, and the adjusting assembly 3 is adapted to rotate relative to the positioning tube 2, abut against the yarn 4 and is adapted to move up and down relative to the positioning tube 2; there is a gap between the outer wall of the adjusting assembly 3 and the bottom wall of the frame 5, and during the normal conveying of the yarn 4, the adjusting assembly 3 rotates relative to the frame 5.

[0074] Refer to the attached Figure 2 figure, the yarn 4 passes through the gap between the adjusting assembly 3 and the driving roller 1 and then moves horizontally; during the normal conveying of the yarn 4, when the yarn 4 passes through the pressure guiding tube 31 and the driving roller 1, the outer wall of the yarn 4 abuts against the outer walls of the pressure guiding tube 31 and the driving roller 1 respectively; when the driving roller 1 rotates, while driving the yarn 4 to move horizontally, it drives the pressure guiding tube 31 to rotate synchronously. At this time, the rotation directions of the pressure guiding tube 31 and the driving roller 1 are opposite. Figure 2 In the figure, F1 represents the horizontal movement direction of the yarn 4; F2 represents the rotation directions of the driving roller 1 and the pressure guiding tube 31. If the outer diameter of the knotted part of the yarn 4 is smaller than the descending threshold of the adjusting assembly 3 (the descending threshold refers to the maximum stroke of the pressure guiding tube 31 moving downward relative to the positioning tube 2. If the pressure guiding tube 31 moves downward to the maximum stroke, the pressure guiding tube 31 is limited by the bottom wall of the frame, resulting in the pressure guiding tube 31 being unable to continue rotating relative to the positioning tube 2), the knotted part of the yarn 4 is adapted to pass through the gap between the adjusting assembly 3 and the driving roller 1; if the outer diameter of the knotted part of the yarn 4 is larger than the descending threshold of the adjusting assembly 3, the knotted part of the yarn 4 squeezes the adjusting assembly 3 to move downward, and the bottom wall of the frame 5 limits the rotation of the adjusting assembly 3 to limit the horizontal movement of the knotted part of the yarn 4. Through the setting of the adjusting assembly 3, it realizes the detection of whether the outer diameter of the knotted part of the yarn 4 is qualified in a mechanical dynamic response manner. Compared with the traditional optical detection method, the detection accuracy is significantly improved. In this embodiment, the knotted part of the yarn is formed by manually tying the two ends together after the yarn breaks, so the outer diameter of the knotted part of the yarn is inconsistent.

[0075] Refer to the attached Figure 4, the adjustment assembly 3 includes: a pressure pipe 31 sleeved on the outer wall of the positioning pipe 2, and a plurality of first water holes 310 are radially formed on the outer wall thereof; the pressure pipe 31 is adapted to rotate circumferentially relative to the positioning pipe 2. When the pressure pipe 31 is squeezed by the yarn 4 or the knot of the yarn 4, the pressure pipe 31 is adapted to move downward relative to the positioning pipe 2. At this time, the axis of the pressure pipe 31 is offset relative to the axis of the positioning pipe 2. An extension pipe 32, two extension pipes 32 are respectively arranged at both ends of the pressure pipe 31, the inner diameter thereof is the same as the inner diameter of the pressure pipe 31, and the outer diameter is smaller than the outer diameter of the pressure pipe 31; the extension pipe 32 is integrally arranged with the pressure pipe 31, and the extension pipe 32 is located inside the fixed pipe 21. The thickness of the extension pipe 32 is smaller than the gap between the positioning pipe 2 and the fixed pipe 21. A plurality of flexible members 33 extending along the axial direction of the pressure pipe 31, and a plurality of the flexible members 33 are circumferentially distributed along the inner wall of the extension pipe 32; wherein, after the yarn 4 passes through the adjustment assembly 3 and between the driving rollers 1, the yarn 4 squeezes the pressure pipe 31 to move downward; when the pressure pipe 31 moves downward, the extension pipe 32 squeezes each flexible member 33 located above the positioning pipe 2 to be compressed and deformed; so that the water adsorbed in the absorbent strip flows through the flow channel 320 to the first water hole 310, and the first water hole 310 is adapted to adhere the water to the outer wall of the passing yarn 4. Further, the aqueous solution contains 0.5% antistatic agent to avoid static electricity generated during the movement of the yarn 4. If the outer diameter of the knot of the yarn 4 is greater than the descending threshold of the adjustment assembly 3, the bottom wall of the frame 5 limits the rotation of the pressure pipe 31. A brake block is arranged on the bottom wall of the frame 5, and the brake block is arc-shaped. When the pressure pipe 31 is squeezed downward by the knot block of the yarn 4 and abuts against the brake block, the brake block limits the rotation of the pressure pipe 31. At this time, the knot of the yarn 4 cannot pass through the gap between the driving roller 1 and the pressure pipe 31, and the yarn 4 stops moving horizontally. A cleaning block is arranged near the brake block of the frame 5, and the cleaning block is adapted to fit the outer wall of the pressure pipe 31 to clean the fluff and water on the pressure pipe 31.

[0076] Reference appendix Figure 3 , a fixed pipe 21 is respectively sleeved at both ends of the outer wall of the positioning pipe 2, and an accommodation cavity 22 is provided between the fixed pipe 21 and the positioning pipe 2; the outer diameter of the fixed pipe 21 is not greater than the outer diameter of the pressure pipe 31; a sealing disc 23 is respectively arranged at both ends of the fixed pipe 21. Further, a water inlet pipe is arranged on the side wall of the sealing disc 23, and the water inlet pipe is adapted to convey water into the accommodation cavity 22. Water is stored in the accommodation cavity 22, and the water level 6 is not greater than 1 / 3 of the diameter of the fixed pipe 21; wherein, when the pressure pipe 31 rotates, each flexible member 33 is successively immersed in water. When the flexible member 33 is immersed in the water level 6, each flexible member 33 returns to its original position under the elastic action; as the pressure pipe 31 continues to rotate, when the flexible member 33 moves above the positioning pipe 2, the extension pipe 32 squeezes the flexible member 33 to deform, so that the water in the water absorption strip 331 flows through the flow channel 320 to the first water hole 310.

[0077] Continue to refer to the appendix Figure 4 Moreover, the adjusting component 3 further includes a sealing ring 34. The two sealing rings 34 are respectively arranged at the ends of the extension pipe 32. The sealing ring 34 is adapted to seal the gap between the fixed pipe 21 and the positioning pipe 2. The cooperation between the sealing ring 34 and the sealing disc 23 is adapted to seal the accommodating cavity 22 to form a closed chamber. The sealing ring 34 is elastic. When the extension pipe 32 moves up and down relative to the positioning pipe 2, the sealing ring 34 follows to be compressed or elongated, and the sealing ring 34 is adapted to prevent the water in the accommodating cavity 22 from overflowing outward.

[0078] Refer to the appendix Figure 5 Moreover, the flexible member 33 includes: a water-absorbing strip 331, which is rectangular and extends along the axial direction of the extension pipe 32; the water-absorbing strip 331 is a water-absorbing sponge with a porosity of 95-97%. A protective sheet 332, whose cross-section is "U"-shaped, with both ends fixed to the inner wall of the extension pipe 32, and the water-absorbing strip 331 is located inside the protective sheet 332; the protective sheet 332 is a flexible member. A plurality of second water holes are opened in the protective sheet 332 near the extension pipe 32. When the flexible member 33 is immersed in water as a whole, water flows into the water-absorbing strip 331 through the second water holes. The inner wall of the protective sheet 332 is parallel to the outer wall of the positioning pipe 2; wherein, when the pressure pipe 31 is squeezed downward by the yarn 4, the positioning pipe 2 squeezes the protective sheet 332 and the water-absorbing strip 331 to be compressed and deformed, so that the water in the water-absorbing strip 331 flows upward through the first water hole 310 to the yarn 4. Figure 5 In [reference], F1 represents the downward extrusion force received by the extension pipe 32, and this extrusion force is caused by the knot of the yarn 4 squeezing the pressure pipe 31 downward. The extension pipe 32 drives the water-absorbing strip 331 and the protective sheet 332 to abut against the positioning pipe 2, and the positioning pipe 2 and the extension pipe 32 squeeze the water-absorbing strip 331 from both sides, so that the water in the water-absorbing strip 331 flows through the flow channel 320 to the first water hole 310.

[0079] Continue to refer to the appendix Figure 4 Moreover, the extension pipe 32 is axially provided with a plurality of flow channels 320, and one flow channel 320 corresponds to one water-absorbing strip 331; the flow channel 320 communicates with the first water hole 310 and the water-absorbing strip 331; the axis of the flow channel 320 forms an inclined angle of 8±0.5° with the axis of the extension pipe 32 to guide the water flow to the first water hole 310. Among them, when the protective sheet 332 and the water-absorbing strip 331 are squeezed and deformed, the water in the water-absorbing strip 331 flows through the flow channel 320 to the first water hole 310. The inner wall of the flow channel 320 is provided with a spiral flow guiding groove, the groove depth is 0.1-0.3 mm, and the pitch is 2-3 times the diameter of the flow channel 320. Thereby reducing the flow resistance of the water flow in the flow channel 320.

[0080] At least one embodiment provides a detection method for a detection device, and the detection method includes:

[0081] The yarn 4 moves horizontally after passing between the adjusting assembly 3 and the driving roller 1;

[0082] If the outer diameter of the knot of the yarn 4 is less than the lowering threshold of the adjusting assembly 3, the knot of the yarn 4 is adapted to pass through the gap between the adjusting assembly 3 and the driving roller 1;

[0083] If the outer diameter of the knot of the yarn 4 is greater than the lowering threshold of the adjusting assembly 3, the knot of the yarn 4 presses the adjusting assembly 3 to move downward, and the bottom wall of the frame 5 limits the rotation of the adjusting assembly 3 to limit the horizontal movement of the knot of the yarn 4.

[0084] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0085] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms used herein do not imply an order or sequence unless clearly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0086] Based on the above inspiration of the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A detecting device for surface defect degree of covered yarn, characterized in that, Comprising: A driving roller (1) rotatably arranged on a frame (5) for driving a yarn (4) to move horizontally; A positioning tube (2) arranged parallel to the driving roller (1) below; An adjusting assembly (3) sleeved on the outer wall of the positioning tube (2), abutted against the yarn (4) and adapted to move up and down relative to the positioning tube (2); Wherein, the yarn (4) passes between the adjusting assembly (3) and the driving roller (1) and then moves horizontally; If the outer diameter of the knotted part of the yarn (4) is smaller than the descending threshold of the adjusting assembly (3), the knotted part of the yarn (4) is adapted to pass through the gap between the adjusting assembly (3) and the driving roller (1); If the outer diameter of the knotted part of the yarn (4) is larger than the descending threshold of the adjusting assembly (3), the knotted part of the yarn (4) presses the adjusting assembly (3) to move downward, and the bottom wall of the frame (5) limits the rotation of the adjusting assembly (3) to limit the horizontal movement of the knotted part of the yarn (4); The adjusting assembly (3) includes: a pressure tube (31) sleeved on the outer wall of the positioning tube (2), and a plurality of first water holes (310) are radially formed on the outer wall; Extension tubes (32), two of the extension tubes (32) are respectively arranged at both ends of the pressure tube (31), the inner diameter of which is the same as that of the pressure tube (31), and the outer diameter is smaller than that of the pressure tube (31); A plurality of flexible members (33) extending along the axial direction of the pressure tube (31), and the plurality of flexible members (33) are circumferentially distributed along the inner wall of the extension tube (32); Wherein, after the yarn (4) passes between the adjusting assembly (3) and the driving roller (1), the yarn (4) presses the pressure tube (31) to move downward; When the pressure tube (31) moves downward, the extension tube (32) presses each flexible member (33) located at the upper part of the positioning tube (2) to be compressed and deformed; If the outer diameter of the knotted part of the yarn (4) is larger than the descending threshold of the adjusting assembly (3), the bottom wall of the frame (5) limits the rotation of the pressure tube (31).

2. The surface defect degree detection device for covered yarn according to claim 1, characterized in that A fixing tube (21) is respectively sleeved at both ends of the outer wall of the positioning tube (2), and an accommodating cavity (22) is provided between the fixing tube (21) and the positioning tube (2); The outer diameter of the fixing tube (21) is not larger than the outer diameter of the pressure tube (31); A sealing disc (23) is respectively arranged at both ends of the fixing tube (21).

3. The surface defect degree detection device for covered yarn according to claim 2, characterized in that Water is stored in the accommodating cavity (22), and the height of the water level (6) is not larger than 1 / 3 of the diameter of the fixing tube (21); Wherein, when the pressure tube (31) rotates, each flexible member (33) is successively immersed in water.

4. The surface defect degree detection device for covered yarn according to claim 2, characterized in that The adjusting assembly (3) further includes a sealing ring (34), and the two sealing rings (34) are respectively arranged at the ends of the extension tube (32), and the sealing ring (34) is adapted to seal the gap between the fixing tube (21) and the positioning tube (2).

5. The surface defect degree detection device for covered yarn according to claim 3, characterized in that The flexible member (33) includes: a water-absorbing strip (331) which is rectangular and extends along the axial direction of the extension tube (32); a protective sheet (332) whose cross-section is "U"-shaped, with both ends fixed to the inner wall of the extension tube (32), and the water-absorbing strip (331) is located inside the protective sheet (332); The inner wall of the protective sheet (332) is parallel to the outer wall of the positioning tube (2); Among them, when the pressure tube (31) is extruded downward by the yarn (4), the positioning tube (2) extrudes the protective sheet (332) and the water-absorbing strip (331) to compress and deform, so that the water in the water-absorbing strip (331) flows upward through the first water hole (310) to the yarn (4).

6. The covering yarn surface defect degree detection device according to claim 5, characterized in that The extension tube (32) is axially provided with a plurality of flow channels (320), and one flow channel (320) corresponds to one water-absorbing strip (331); The flow channel (320) communicates the first water hole (310) and the water-absorbing strip (331); Among them, when the protective sheet (332) and the water-absorbing strip (331) are extruded and deformed, the water in the water-absorbing strip (331) flows through the flow channel (320) to the first water hole (310).

7. The covering yarn surface defect degree detection device according to claim 5, characterized in that The water-absorbing strip (331) is a water-absorbing sponge with a porosity of 95-97%.

8. The covering yarn surface defect degree detection device according to claim 6, characterized in that The axis of the flow channel (320) forms an inclined angle of 8±0.5° with the axis of the extension tube (32) to guide the water flow to the first water hole (310).

9. The covering yarn surface defect degree detection device according to claim 8, characterized in that The inner wall of the flow channel (320) is provided with a spiral flow guiding groove, the groove depth is 0.1-0.3 mm, and the pitch is 2-3 times the diameter of the flow channel (320).

10. A detection method for a detection device, characterized in that, Using the covering yarn surface defect degree detection device according to any one of claims 1-9, the detection method includes: The yarn (4) horizontally moves after passing through between the adjusting assembly (3) and the driving roller (1); If the outer diameter of the knot of the yarn (4) is smaller than the lowering threshold of the adjusting assembly (3), the knot of the yarn (4) is adapted to pass through the gap between the adjusting assembly (3) and the driving roller (1); If the outer diameter of the knot of the yarn (4) is larger than the lowering threshold of the adjusting assembly (3), the knot of the yarn (4) extrudes the adjusting assembly (3) to move downward, and the bottom wall of the frame (5) limits the rotation of the adjusting assembly (3) to limit the horizontal movement of the knot of the yarn (4).

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