Cotton yarn evenness detection device and detection method

Abstract

The invention belongs to the technical field of textile detection, and particularly relates to a cotton yarn evenness detection device and method.The cotton yarn evenness detection device comprises a detector body, a humidifying box used for humidifying cotton yarn is arranged on the upper portion of the detector body, the outlet end of the humidifying box is connected with a yarn guide pipe, and a monitoring module used for detecting the state of the cotton yarn is embedded in the pipe wall of the yarn guide pipe; a thermal insulation cover is arranged at the lower end of the yarn guide pipe, a compensation module for correcting the temperature and humidity of the cotton yarn according to feedback signals of the monitoring module is arranged in the thermal insulation cover, and a guide strip for guiding the starting end of the cotton yarn to sequentially penetrate through the yarn guide pipe, the compensation module and the capacitor module to the traction roller is inserted into the yarn guide pipe; through cooperation of the structure, the uniformity detection time of the cotton yarn is shortened, and meanwhile the interference of the temperature and humidity difference of the inner and outer yarn layers of the yarn roll on the uniformity detection result is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile detection, and specifically relates to a device and method for detecting the evenness of cotton yarn sliver. Background Art

[0002] Spinning, as the core process link of textile engineering, its quality directly affects the value conversion efficiency of fiber raw materials into finished fabrics. In the multi-dimensional evaluation system of yarn quality, evenness is a key quality parameter, which directly characterizes the fluctuation characteristics of the linear density of the yarn in the axial direction, determines the running stability of the subsequent weaving process and the quality performance of the final product. Therefore, it is necessary to implement the detection of evenness during the textile process, and the capacitance type evenness is the existing evenness detection equipment.

[0003] However, the above capacitance type evenness tester still has some defects: for example, when this kind of detection instrument detects the evenness, it is necessary to carry out humidity conditioning treatment on the sample to be detected to avoid the influence of the temperature and humidity of the sample itself. However, the existing evenness humidity conditioning often requires a large amount of detection preparation time, so that the problems occurring in the produced yarn cannot be timely feedback. At the same time, the temperature and humidity of the inner and outer layer yarns of the yarn roll are prone to differences, resulting in economic losses to textile production due to the delay of the detection results.

[0004] Therefore, the present invention provides a device and method for detecting the evenness of cotton yarn sliver. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A device for detecting the evenness of cotton yarn sliver according to the present invention includes a detector main body. A humidity conditioning box for conditioning cotton yarn is arranged on the upper part of the detector main body. A guide yarn tube is connected to the outlet end of the humidity conditioning box, and a monitoring module for detecting the state of the cotton yarn is embedded in the tube wall thereof. A heat insulation cover is arranged at the lower end of the guide yarn tube, and a compensation module for correcting the temperature and humidity of the cotton yarn according to the feedback signal of the monitoring module is arranged therein. A guiding strip for guiding the starting end of the cotton yarn to sequentially pass through the guide yarn tube, the compensation module, the capacitance module to the traction roller is inserted into the guide yarn tube.

[0007] Further, a yarn seat is rotatably arranged in the humidity conditioning box, and a support rod is arranged on one side in the humidity conditioning box, and a yarn guiding ring aligned with the guide yarn tube is arranged on the support rod.

[0008] Further, a tension spring for buffering the yarn guiding ring is arranged at the upper end of the support rod.

[0009] Further, the monitoring module includes an infrared temperature-sensitive sensor for monitoring temperature and an infrared moisture sensor for monitoring humidity.

[0010] Further, the compensation module includes a compensation cylinder disposed inside the heat insulation cover. An ultrasonic atomizer and an integrated semiconductor refrigeration sheet electrically connected to the monitoring module are respectively disposed inside the compensation cylinder.

[0011] Further, a card slot is provided on one side of the upper end of the guiding strip, and an elastic flap for fixing the cotton yarn is inlaid at the edge of the card slot.

[0012] Further, a sponge ring sleeve is inlaid on the outer side of the upper part of the guiding strip, and the diameter of the sponge ring sleeve is 1-2 mm larger than the inner hole diameter of the yarn guide tube.

[0013] Further, the compensation cylinder is rotatably disposed inside the heat insulation cover. A manual drive wheel is provided on the outer side of the lower end of the compensation cylinder, and a first gear is fixedly connected to its lower end. A first transmission shaft is rotatably disposed inside the heat insulation cover, and a second gear matching the first gear is sleeved on the outer part of its upper end. A worm gear is fixed to the lower end of the first transmission shaft. A rotating shaft is rotatably disposed inside the heat insulation cover, and a worm gear sleeve matching the worm gear is fixed to the outer side of the rotating shaft. A drive wheel for driving the guiding strip is fixed to one end of the worm gear sleeve.

[0014] Further, one end of the rotating shaft penetrates through the main body of the detector and is in electromagnetic clutch linkage with the transmission part of the traction roller.

[0015] A method for detecting the evenness of cotton yarn includes the following steps by using the above-mentioned device for detecting the evenness of cotton yarn: S1. Select the range of the capacitance module required according to the specification of the cotton yarn to be detected, and move it to directly below the discharge port of the heat insulation cover. S2. Place the cotton yarn roll to be detected into the humidity conditioning box, wind the starting end of the cotton yarn around the guiding strip, insert the lower end of the guiding strip into the yarn guide tube, and make the lower end of the guiding strip contact the traction roller. S3. Set the temperature inside the humidity conditioning box within the range of 20±2°C, and at the same time set its humidity within the range of 65%-70%RH, and start the humidity conditioning box. S4. After the temperature and humidity inside the humidity conditioning box reach the set values, keep it at a constant temperature for 25-30 minutes, start the detector body, make the traction roller drive the guiding strip to drive the starting end of the cotton yarn to move downward, and at the same time correct the temperature and humidity of the passing cotton yarn through the compensation module.

[0016] The beneficial effects of the present invention are as follows: 1. A device and method for detecting the evenness of cotton yarn. By providing a humidity conditioning box on the upper part of the detector body, the cotton yarn roll can be quickly conditioned, improving the efficiency of the evenness detection of cotton yarn. At the same time, a closed-loop cotton yarn conditioning correction means is formed by the monitoring module and the compensation module in the yarn guiding tube, avoiding the interference of the temperature and humidity differences between the inner and outer layers of the yarn roll on the evenness detection result.

[0017] 2. A device and method for detecting the evenness of cotton yarn. By providing a guiding strip as an indirect transmission part between the starting end of the cotton yarn and the traction roller, the threading speed of the cotton yarn before detection is increased. At the same time, it can avoid the initial section of the cotton yarn passing directly through the capacitance module without being conditioned, preventing the omission of the evenness detection of the cotton yarn. Brief Description of the Drawings

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is a partial perspective view of Embodiment 1 of the present invention; Figure 3 is a cross-sectional view of the yarn guiding tube in the present invention; Figure 4 is a schematic structural view of the compensation module in the present invention; Figure 5 is a perspective view of the guiding strip in the present invention; Figure 6 is Figure 5 a partially enlarged view of the top of the guiding strip in Figure 7 is a partial perspective view of Embodiment 2 of the present invention; Figure 8 is Figure 7 a partially enlarged view of part A in

[0020] In the figure: 1, detector main body; 2, humidity conditioning box; 3, yarn guiding tube; 4, elastic flap; 5, heat insulation cover; 6, compensation module; 7, guiding strip; 8, sponge ring sleeve; 9, hand drive wheel; 10, first gear; 11, first transmission shaft; 12, second gear; 13, worm gear; 14, rotating shaft; 15, driving wheel; 16, yarn seat; 17, support rod; 18, yarn guiding ring; 19, tension spring; 20, worm gear sleeve; 40, infrared temperature and humidity sensor; 41, infrared moisture sensor; 60, compensation cylinder; 61, ultrasonic atomizer; 62, integrated semiconductor refrigeration chip. Detailed Embodiments

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figures 1 to 6 shown, a humidity control box 2 is fixed to the upper part of the detector body 1 according to the embodiment of the present invention. At the same time, a temperature and humidity sensor and a PTC heating film are installed in the humidity control box 2, and a double-circulation fan is used to achieve a dynamic balance control state in which the temperature and humidity in the box finally reach the set point value.

[0023] As Figure 2 shown, a yarn seat 16 for carrying a cotton yarn roll is rotatably installed in the humidity control box 2, and a support rod 17 is arranged on one side in the humidity control box 2. The upper end of the support rod 17 is connected to a yarn guide ring 18, so that the cotton yarn enters the yarn guide tube 3 through the turning of the yarn guide ring 18.

[0024] At the same time, in order to cope with the sudden change of yarn tension caused by the speed fluctuation of the traction roller, a tension spring 19 is used to connect the support rod 17 and the yarn guide ring 18, so as to prevent the cotton yarn from deforming due to excessive tension when passing through the yarn guide ring 18, and causing errors in the detection of the evenness of the cotton yarn sliver.

[0025] As Figure 4 shown, the outlet end of the humidity control box 2 is connected to a yarn guide tube 3, and an infrared temperature-sensitive sensor 40 for detecting the temperature of the cotton yarn and an infrared moisture sensor 41 for monitoring the humidity are embedded in its tube wall, and the detection results are transmitted to the PID controller installed on the heat insulation cover 5, which can monitor the temperature and humidity of the passing cotton yarn and provide parameters for compensating the difference between the outer layer and the inner layer of the cotton yarn during the humidity control process of the cotton yarn roll in the humidity control box 2.

[0026] As Figure 4 shown, the lower end of the yarn guide tube 3 is fixedly connected to a heat insulation cover 5, and a compensation cylinder 60 is installed therein. A humidification hole connected to an ultrasonic atomizer 61 is arranged in the compensation cylinder 60, and a semiconductor refrigerating sheet 62 is arranged at the lower part of its inner cavity. The PID controller calculates the feedback signal monitored from the yarn guide tube 3 to realize the closed-loop correction of the moisture content of the cotton yarn.

[0027] As Figure 2 shown, in the specific implementation process, in order to cope with the low efficiency of manually threading the cotton yarn through the yarn guide tube 3 and the compensation cylinder, the starting end of the cotton yarn is wound around the upper end of the guiding strip 7, and then the lower end of the guiding strip 7 is sequentially passed through the yarn guide tube 3, the compensation module 6, the capacitance module to the traction roller, so as to improve the threading efficiency.

[0028] As Figure 5 and Figure 6 shown, in the specific implementation process, in order to solve the problem of quickly connecting the starting end of the cotton yarn to the guiding strip 7, a card slot is arranged on one side of the upper end of the guiding strip 7. At the same time, in order to avoid excessive cutting force of the card slot on the cotton yarn caused by the change of the traction speed and resulting in the breakage of the cotton yarn, an elastic flap 4 for fixing the cotton yarn is inlaid at the edge of the card slot.

[0029] During the specific implementation process, the infrared temperature and humidity sensors 40 and 41 in the yarn guide tube 3 are easily interfered by flying fluffs. Therefore, it is necessary to clean them in advance every time detection is required. Thus, a sponge ring sleeve 8 is inlaid on the upper outer side of the guide bar 7, and the diameter of the sponge ring sleeve 8 is 1 mm larger than the inner hole diameter of the yarn guide tube 3.

[0030] A method for detecting the evenness of cotton yarn includes the following steps: S1. Select the required capacitance module range according to the cotton yarn specifications to be detected, and move it directly below the discharge port of the heat insulation cover 5. S2. Place the cotton yarn roll to be detected on the yarn seat 16 in the conditioning box 2, pass the starting end of the cotton yarn through the yarn guide ring 18 and then wind it onto the guide bar 7, and pass the lower end of the guide bar 7 through the yarn guide tube 3 and the compensation cylinder 60 in sequence to contact the traction roller. S2. Set the temperature in the conditioning box 2 to 18°C and the humidity to 65%RH, and start the conditioning box 2. S3. Insert the guide bar 7 into the yarn guide tube 3, and make the lower end of the guide bar 7 pass through the capacitance module of the detector body and be between the traction rollers of the detector body. S4. After the temperature and humidity in the conditioning box 2 reach the set values and are kept constant for 25 minutes, start the detector body, so that the traction roller drives the guide bar 7 to drive the starting end of the cotton yarn to move downward, and at the same time, the temperature and humidity of the cotton yarn are corrected through the compensation module 6.

[0031] Embodiment 2: As Figure 6 and Figure 7 shown, compared with Embodiment 1, another implementation manner of the present invention is as follows: During the specific implementation process, the staff found that the lower end of the guide bar 7 is in direct contact with the traction roller, which is likely to cause the guide bar 7 to be too long and inconvenient to enter and exit the yarn guide tube 3. Therefore, the compensation cylinder 60 and the heat insulation cover 5 are rotatably connected. A hand drive wheel 9 is fixed on the outer side of the lower end of the compensation cylinder 60, and a first gear 10 is fixedly connected to its lower end. A first transmission shaft 11 is rotatably installed in the heat insulation cover 5, and a second gear 12 meshing with the first gear 10 is installed at its upper end. A worm wheel 13 is fixed at the lower end of the first transmission shaft 11. A rotating shaft 14 is rotatably arranged in the heat insulation cover 5, and a worm gear sleeve 20 matching with the worm wheel 13 is fixed on the outer side of the rotating shaft 14. A driving wheel 15 for driving the guide bar 7 is fixed at one end of the worm gear sleeve 20, so that the guide bar 7 can be manually debugged through the driving wheel 15 to avoid the traction speed of the traction roller being too fast, resulting in the deviation of the starting path of the cotton yarn.

[0032] One end of the rotating shaft 14 penetrates through the main body 1 of the detector and is linked with the driving part of the traction roller by an electromagnetic clutch, so that when the cotton yarn is being tractioned, the synchronous and uniform rotation of the compensation cylinder 60 can be driven synchronously, making the correction of the temperature and humidity of the cotton yarn more uniform and rapid.

[0033] A method for detecting the evenness of cotton yarn sliver includes the following steps: S1. Select the gear of the capacitance module required according to the specification of the cotton yarn to be detected, and move it to directly below the discharge port of the heat insulation cover 5. S2. Place the cotton yarn roll to be detected on the yarn seat 16 in the conditioning box 2, pass the starting end of the cotton yarn through the yarn guide ring 18 and then wind it onto the guiding strip 7, and pass the lower end of the guiding strip 7 through the yarn guide tube 3 and the compensation cylinder 60 in sequence to the driving wheel 15. S3. Set the temperature in the conditioning box 2 to 22°C and the humidity to 70%RH, and start the conditioning box 2. S4. Pull the manual driving wheel 9 to make the lower end of the guiding strip 7 pass through the capacitance module in the monitoring area on the detector body 1, and finally make the lower end of the guiding strip 7 be between the traction rollers. S5. After the temperature and humidity in the conditioning box 2 reach the set values and are kept constant for 30 minutes, start the detector body 1, so that the traction rollers drive the guiding strip 7 to drive the starting end of the cotton yarn to move downward in traction, and at the same time, the temperature and humidity of the cotton yarn are corrected through the compensation module 6.

[0034] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It 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 should not be construed as limiting the protection scope of the present invention.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The protection scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A cotton yarn uniformity detection device, comprising a detection instrument body (1), characterized in that: A humidity control box (2) for adjusting the humidity of the cotton yarn is arranged at the upper part of the detector body (1); the outlet end of the humidity control box (2) is connected to a yarn guide tube (3), the wall of which is embedded with a monitoring module for detecting the state of the cotton yarn; a temperature insulation cover (5) is arranged at the lower end of the yarn guide tube (3), in which is arranged a compensation module (6) for correcting the temperature and humidity of the cotton yarn according to a feedback signal from the monitoring module; a guide bar (7) is inserted into the yarn guide tube (3) for guiding the starting end of the cotton yarn to sequentially pass through the yarn guide tube (3), the compensation module (6), and the capacitor module to the traction roller.

2. A cotton yarn uniformity detection device according to claim 1, characterized in that: A yarn seat (16) is rotatably arranged in the humidity control box (2), and a support rod (17) is arranged on one side of the humidity control box (2), wherein a yarn guide ring (18) aligned with the yarn guide tube (3) is arranged on the support rod (17).

3. A cotton yarn uniformity detection device according to claim 2, characterized in that: The upper end of the support rod (17) is provided with a tension spring (19) for buffering the yarn guide ring (18).

4. A cotton yarn uniformity detection device according to claim 3, characterized in that: The monitoring module comprises an infrared temperature-sensitive sensor (40) for monitoring temperature and an infrared moisture sensor (41) for monitoring humidity.

5. A cotton yarn uniformity detection device according to claim 4, characterized in that: The compensation module (6) comprises a compensation cylinder (60) arranged in the thermal insulation cover (5), wherein an ultrasonic atomizer (61) and an integrated semiconductor cooling sheet (62) electrically connected to the monitoring module are respectively arranged in the compensation cylinder (60).

6. A cotton yarn uniformity detection device according to claim 5, characterized in that: A slot is provided on one side of the upper end of the guide strip (7), and an elastic flap (4) for fixing the cotton yarn is inlaid at the edge of the slot.

7. A cotton yarn uniformity detection device according to claim 6, characterized in that: The outer side of the upper part of the guide strip (7) is inlaid with a sponge ring sleeve (8), and the diameter of the sponge ring sleeve (8) is 1-2 mm larger than the inner hole diameter of the yarn guide tube (3).

8. A cotton yarn uniformity detection device according to claim 7, characterized in that: The compensation cylinder (60) is rotatably arranged in the heat-insulating cover (5), and a hand-driven wheel (9) is arranged on the outer side of the lower end of the compensation cylinder (60), and a first gear (10) is fixedly connected to the lower end of the compensation cylinder. A first transmission shaft (11) is rotatably arranged in the heat-insulating cover (5), and a second gear (12) matching the first gear (10) is sleeved on the outer side of the upper end of the compensation cylinder (60). A worm gear (13) is fixed on the lower end of the first transmission shaft (11). A rotating shaft (14) is rotatably arranged in the heat-insulating cover (5), and a worm sleeve (20) matching the worm gear (13) is fixed on the outer side of the rotating shaft (14). A driving wheel (15) for driving the guide strip (7) is fixed on one end of the worm sleeve (20).

9. A cotton yarn uniformity detection device according to claim 8, characterized in that: One end of the rotating shaft (14) passes through the detector body (1) and is electromagnetically clutched with the transmission part of the traction roller.

10. A method for detecting uniformity of cotton yarn, the method using the device for detecting uniformity of cotton yarn according to claim 9, characterized in that: The following steps are involved: S1. Select the required capacitance module range according to the specifications of the cotton yarn to be tested, and move it to the position directly below the discharge port of the temperature-insulating cover (5); S2, placing the cotton yarn roll to be tested in the humidity conditioning box (2), winding the starting end of the cotton yarn onto the guide bar (7), inserting the lower end of the guide bar (7) into the yarn guide tube (3), and making the lower end of the guide bar contact with the traction roller; S3, setting the inner temperature of the humidity control box (2) to 20±2°C, and the humidity to 65%-70%RH, and starting the humidity control box (2); S4. When the temperature and humidity in the humidity control box (2) reach the set value, the constant temperature is maintained for 25-30 minutes, and the detector body (1) is started, so that the traction roller drives the guide bar (7) to drive the starting end of the cotton yarn to move downward, and at the same time, the temperature and humidity of the passing cotton yarn are corrected by the compensation module (6).

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