Cotton fiber impurity removal structure

Abstract

The present invention discloses a cotton fiber impurity removal structure, comprising: a licker-in roller, a plurality of impurity removal knives, the impurity removal knives are arranged on one side of the licker-in roller, the gap between the blade surface of each impurity removal knife facing the licker-in roller and the surface of the licker-in roller is 0.6-6 mm adjustable; the side of each impurity removal knife facing the licker-in roller is densely covered with combing needle saw teeth, the combing needle saw teeth are spaced apart from the licker-in roller rack on the licker-in roller, and the spacing h is less than the spacing between the impurity removal knife blade and the licker-in roller rack, the arc length of the interval between adjacent impurity removal knives in the circumferential direction of the licker-in roller is not less than the length of the cotton fiber, the combing needle saw teeth and the licker-in roller rack face oppositely, the rack rake angle α of the combing needle saw teeth is ‑arcsin(h / c)~arcsin(h / c)°, the cotton fiber length is c, and the licker-in roller rack rake angle β of the licker-in roller is arcsin(h / c)~36°. The cotton fiber can be combed and impurities are removed without damaging the cotton fiber, thereby improving the impurity removal rate.

Description

Technical Field

[0001] The invention relates to the field of cotton primary processing machinery, in particular to a cotton fiber impurity removal structure. Background Art

[0002] Most of the existing cotton primary processing machines, especially lint cleaning machines, are equipped with multiple impurity removal knives, such as patents: CN201722457U, CN201588010U, CN201362763Y, etc. The impurity removal knife is the key core component of the lint cleaning machine to remove impurities. In order to improve the impurity removal efficiency, the diameter of the thorn roller of the lint cleaning machine is getting larger and larger, and the number of impurity removal knives installed is increasing. Especially when the cleaning machine is picking cotton, 2-3 lint cleaning machines are used, and the number of impurity removal knives used is more. This lint cleaning machine and the method of using more impurity removal knives for impurity removal have two obvious disadvantages:

[0003] Disadvantages 1. The impurity removal efficiency is low, and it is difficult to remove impurities such as tiny cotton leaves, cotton stars, cotton knots, and ropes: According to the technical requirements 4.2.2 of GB / T21308-2007 for lint cleaning machines, "impurity removal efficiency (based on the impurity content of lint before cleaning): when the impurity content of lint before cleaning is greater than 2.5%, the impurity removal efficiency shall not be less than 40%", that is, the lint after cleaning by the above-mentioned lint cleaning machine still contains about 60% of impurities that have not been cleaned, and the rolling quality can only reach the P3 value of the "Price Difference Table for Quality of Sawtooth Processed Fine Cotton", and the price difference is reduced by about 200 yuan / ton, especially when the cotton is picked by the processing machine, because the impurities such as tiny cotton leaves, cotton knots, and ropes on the machine-picked cotton fibers are higher in content, these impurities are light in weight, small in size, and mixed in the cotton fibers. The existing lint cleaning machines can hardly effectively remove them by relying solely on the impact force of the impurity removal knife, resulting in worse rolling quality and a greater reduction in the price difference of lint.

[0004] Disadvantage 2. The use of multiple lint cleaning machines, i.e., more impingement forces from the removal knives, will intensify the damage to the cotton fibers. According to the paper “The Effect of Sawtooth Lint Cleaners on the Performance of Machine-Picked Cotton” published by Xu Hong et al. of the School of Textiles and Clothing of Xinjiang University, “After each lint cleaning, the main body length of the fiber will decrease by 0.5mm, the length uniformity will decrease by 0.1-0.3%, and the breaking degree will decrease to 0.6-0.7cN / tex”. For example, the report of Anqing Branch of Anhui Cotton and Linen Company, “The Effect of Lint Cleaners on Lint Quality”, caused damage to the cotton fibers, and the short fibers increased by 40% compared with the cotton fibers that had not been cleaned with lint. Therefore, after cleaning with two lint cleaning machines, the main body length of the cotton fibers alone will decrease by 1mm. According to the “Price Difference Table for Sawtooth Processed Fine Cotton Quality”, the price difference will decrease by -210 to -820 yuan / ton for every 1mm decrease in cotton fiber length, resulting in a serious loss of cotton fiber value. In addition, the increase in the number of lint cleaning machines used will also cause the construction cost and operation cost of lint cleaning equipment to increase exponentially. Summary of the invention

[0005] In order to solve the problem of low impurity removal efficiency of impurity removal knives in current cotton primary processing machinery, the present invention provides a cotton fiber impurity removal structure.

[0006] The technical solution adopted by the present invention is:

[0007] A cotton fiber trash removal structure comprises: a licker-in roller, a plurality of trash removal knives, wherein the trash removal knives are arranged on one side of the licker-in roller, the gap between the blade body of the trash removal knife facing the licker-in roller and the surface of the licker-in roller is 0.6 mm-6 mm, the side of each trash removal knife facing the licker-in roller is densely covered with combing needle teeth, and the distance from all the combing needle teeth in any row or each row of combing needle teeth distributed along the licker-in roller axis to the surface of the licker-in roller is equal; the combing needle teeth are spaced apart from the licker-in roller rack on the licker-in roller, and the spacing h is less than the The distance between the heel end of the trash removal knife and the licker-in roller rack, the distance between the blade end of the trash removal knife and the licker-in roller is not greater than the distance between the heel end and the licker-in roller, the arc length of the interval between adjacent trash removal knives in the circumferential direction of the licker-in roller is not less than the length of the cotton fiber, the comb needle teeth and the licker-in roller rack are in opposite directions, the rack rake angle α of the comb needle teeth is -arcsin(h / c)~arcsin(h / c)°, the cotton fiber length is c, and the licker-in roller rack rake angle β of the licker-in roller is arcsin(h / c)~36°.

[0008] Preferably, the distances between the blade end of the debris removal knife and the heel end opposite to the blade end and the surface of the licker-in roller are adjustable.

[0009] Preferably, the rack spacing of the comb needle teeth is smaller than the rack winding spacing of the licker-in roller rack.

[0010] Preferably, the needle teeth form a combing surface on the surface of the debris removal knife, the length of the combing surface extending along the axial direction of the licker-in roller is greater than the axial length of the licker-in roller, and the width of the combing surface in a direction perpendicular to the axial direction of the licker-in roller is greater than the length of the cotton fiber.

[0011] Preferably, the side of the debris removal knife facing the licker-in roller forms an arc surface that matches the surface of the licker-in roller.

[0012] Preferably, a groove extending along the axial direction of the licker-in roller is provided on the side of the debris removal knife facing the licker-in roller, and a combing plate densely covered with combing needle teeth is installed in the groove.

[0013] Furthermore, the length of the cotton fiber is 10-30 mm, the rack height of the combing needle serrations is 0.6-1.5 mm, the rack rake angle α of the combing needle serrations is -5-5°, and the licker-in roller rack rake angle β of the licker-in roller is 10-36°.

[0014] The impurity removal process and beneficial effects of the present invention are as follows:

[0015] When the licker-in roller pulls the cotton fibers to the edge of the trash removal blade, impurities such as sterile seeds and cottonseed shells mixed in the cotton fibers, due to their large size and heavy mass, are subject to the greater centrifugal force of the rotation of the licker-in roller and float on the outside of the cotton fiber layer of the licker-in roller. They are blocked by the front edge of the trash removal knife and are discharged from the cotton fiber layer. The smaller the gap between the trash removal knife and the licker-in roller, the more trash can be removed. However, the rotation speed of the licker-in roller, the front angle of the licker-in roller rack, the pressure during cotton feeding, and the arc length of the trash removal knife from the cotton feeding point will affect the grip and centrifugal force of the licker-in roller on the cotton fibers. Therefore, the trash removal The gap between the blade and the licker-in roller is preferably set to 0.6-6mm; when the blade end of the impurity removal knife is closer to the licker-in roller, it is used for impurity removal, and when the heel end of the knife is farther from the licker-in roller, it is convenient for the cotton fiber to rotate with the licker-in roller to separate the impurities to the surface of the floating layer. The width of the combing surface on the impurity removal knife along the rotation direction of the licker-in roller is not less than the length of the cotton fiber, that is, greater than the length of the cotton fiber after being hooked and pulled by the licker-in roller, and is preferably set to 20-80mm, so as to facilitate the cotton fiber to be fully stretched and combed into a straight state, to facilitate the separation of impurities from the cotton fiber, and to facilitate the tearing of the cotton knot ropes;

[0016] Some tiny impurities such as cotton leaves, cotton stars, etc., and some light impurities such as cotton neps, ropes, etc. are attached to the cotton fiber layer due to their light weight or tight entanglement with the cotton fibers, and are difficult to be removed by the front end of the impurity removal knife. They are pulled into the arc surface of the impurity removal knife facing the licker-in roller with the licker-in roller;

[0017] Since the length of cotton fiber is generally 10-30mm, after being pulled and rotated by the licker-in roller teeth, the floating layer of cotton fiber entering the gap between the trash removal knife and the licker-in roller is driven by the licker-in roller teeth and combed by the combing needle teeth set on the upper part of the trash removal knife, so that each fiber is combed and straightened. In this process, the fine impurities mixed on the cotton fiber are less adhered to the cotton fiber by the centrifugal force and separated from the cotton fiber. The cotton knots mixed in the cotton fiber are combed and torn apart to form effective cotton fiber, and the originally damaged cotton fiber can be recycled.

[0018] The combed cotton fibers move away from the impurity removal knife along with the licker-in roller. The fine impurities separated from the cotton fibers during the combing process or fall into the combing needle rack on the impurity removal knife. The cotton fiber tails rotating at high speed are pulled out of the combing needle rack by the licker-in roller and discharged out of the cotton layer at the end of the impurity removal knife facing away from the blade.

[0019] During the combing process, some impurities that are not completely separated from the cotton fibers are also thrown out of the cotton fiber layer after the cotton fiber layer leaves the impurity removal knife due to the centrifugal force of the licker-in roller and the wind force generated by the licker-in roller.

[0020] Before the combed cotton fibers are separated from the licker-in roller, the next impurity removal knife is installed according to the above method to comb and clean the cotton fibers again, and the cleaning is performed multiple times.

[0021] The arc length of the interval between adjacent trash removal knives in the circumferential direction of the licker-in roller is not less than the length of the cotton fiber, that is, greater than the length of the cotton fiber after being hooked and pulled by the licker-in roller, and is preferably set to 20-80mm, in order to facilitate the complete stretching and combing of the cotton fiber into a straight state, to facilitate the separation of impurities from the cotton fiber, and to facilitate the pulling apart of the cotton knots;

[0022] The height of the comb needle teeth on the trash removal knife is set to 0.6-1.5mm, that is, the comb needle teeth are spaced apart from the licker-in rack on the licker-in roller, and the average spacing is smaller than the average spacing between the surface of the blade of the trash removal knife facing the licker-in roller and the licker-in rack. If the gap between the tip of the trash removal knife and the licker-in roller is 0.6mm, then the impurities larger than 0.6mm in the cotton fiber and located on the outer layer of the rack roller will be discharged by the tip of the trash removal knife, and the other part of the impurities are mixed in the inner layer of the licker-in rack of the licker-in roller (licker-in roller). The rack height is about 2mm). At this time, if the heel end of the trash removal knife is 6mm away from the licker-in roller surface, the function of the knife body combing needle rack between the knife heel and the blade is to support, guide and comb the cotton fibers on the licker-in roller. The larger the gap between the knife heel end and the licker-in roller surface, the faster the cotton fibers and impurities on the licker-in roller are separated, the shorter the separation distance is, and the more trash removal knives are installed. Conversely, the smaller the gap between the knife heel end and the licker-in roller surface is, the longer the distance that the cotton fibers and impurities are separated from the licker-in roller is, and the fewer trash removal knives are installed.

[0023] Assuming that both ends of each cotton fiber are pulled straight by the needle teeth and the licker-in roller hook, the larger the spacing between the needle teeth and the licker-in roller surface, the larger the angle between the straightened cotton fiber and the licker-in roller surface, the spacing h between the needle teeth near the heel end and the licker-in roller is 4.5-5.4 mm, and the angle between each cotton fiber at the heel end that is straightened by the needle teeth and the licker-in roller teeth and the licker-in roller surface is arcsin (h / c) = 8.62° ~ 32.68°, wherein c = 10-30 mm, preferably, the needle teeth and the licker-in roller teeth face oppositely, the needle teeth rake angle is -5° ~ 5°, or plus or minus 5°, and the licker-in roller rack rake angle of the licker-in roller is It is set to arcsin (h / c) ~ 36°. The purpose is that when the front angle of the comb needle teeth is greater than arcsin (h / c)°, the comb needle teeth exert a component force on the cotton fiber that moves toward the root of the comb needle teeth, which will cause a small amount of cotton fiber to detach from the licker-in roller rack. The detached cotton fibers accumulate on the comb needle teeth and cause cotton fiber blockage. When the front angle of the comb needle teeth is less than 5°, the cotton fibers at the heel end will not detach from the licker-in roller; and when the front angle of the comb needle teeth at the heel end is less than -arcsin (h / c)°, the comb needle teeth push the cotton fibers to the licker-in roller, and the cotton fibers are not easy to straighten and comb, and the fine impurities mixed between the cotton fibers are not easy to centrifuge.

[0024] The purpose of making the licker-in rack rake angle β of the licker-in roller to be arcsin (h / c) ~ 36° is to make the licker-in rack apply a force component to the cotton fiber that moves toward the root of the licker-in rack, and make this force component greater than the force applied by the cotton fiber to the root of the combing needle teeth, so that the friction force of the combing needle teeth on the trash removal knife is smaller than the gripping force of the licker-in rack on the cotton fiber, thereby further preventing the cotton fiber from being blocked.

[0025] Set the tooth density of the comb needle to 30-100 teeth / 25mm 2 The density of the teeth of the licker-in roller is greater than that of the teeth of the combing needles, that is, the spacing of the teeth of the combing needles is less than the winding spacing of the teeth of the licker-in roller; the purpose is to make the cotton fibers hooked by the licker-in roller evenly combed by the teeth of the combing needles on the trash removal knife.

[0026] One of the benefits of the present invention is that: without increasing the kinetic energy consumption of the cotton primary processing machinery, the impurity removal efficiency of each impurity removal knife can be increased by more than 8%, and the impurity removal efficiency of each machine can be increased by more than 30%. In particular, the present invention can greatly improve the impurity removal efficiency of fine impurities that are difficult to remove with existing impurity removal knives;

[0027] The second benefit of the present invention is that the present invention can loosen and recycle the cotton knots and cords that are difficult to remove by the existing cotton primary processing machinery. Each impurity removal knife can reduce the content of cotton knots and cords by more than 15%. After the cotton fibers are cleaned by the present invention machinery, there are basically no cotton knots and cords, and the cotton fibers are not damaged.

[0028] The third benefit of the present invention is that the appearance of the cleaned cotton fibers, including the color of the cotton fibers, is greatly improved, thereby increasing the use value and economic value of the cotton fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the cotton fiber impurity removal structure of the present invention;

[0030] Figure 2 It is an enlarged schematic diagram of the debris removal knife of the present invention;

[0031] Figure 3 It is a schematic diagram of the principle of straightening cotton fibers of the cotton fiber impurity removal structure of the present invention;

[0032] Figure 4 It is a schematic diagram of the principle of straightening cotton fibers of the cotton fiber impurity removal structure of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the cotton fiber impurity removal structure of the present invention. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not have to be used to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, materials or methods are not specifically described.

[0035] Example 1

[0036] like Figure 1 and Figure 2 A cotton fiber trash removal structure comprises: a licker-in roller 2, a plurality of trash removal knives 1, the trash removal knives 1 are arranged on one side of the licker-in roller 2, the extension surface of each trash removal knife 1 facing the licker-in roller 2 is parallel to the surface of the licker-in roller 2, and the gap with the surface of the licker-in roller 2 is 5-6 mm, so that the trash removal knife 1 does not damage the cotton fibers rotating with the licker-in roller 2; the side of each trash removal knife 1 facing the licker-in roller 2 is densely covered with combing needle teeth 11, see Figure 3 c. The combing needle teeth 11 are spaced apart from the licker-in roller rack 21 on the licker-in roller 2, and the spacing h is smaller than the spacing between the end of the butt 15 of the trash removal knife 1 and the licker-in roller rack 21. The arc length of the spacing between adjacent trash removal knives 1 in the circumferential direction of the licker-in roller 2 is not less than the length of the cotton fiber, preferably 40 to 80 mm. The combing needle teeth 11 form a combing surface on the surface of the trash removal knife 1. The length of the combing surface extending along the axial direction of the licker-in roller 2 is greater than the axial length of the licker-in roller 2. The width of the combing surface in the direction perpendicular to the axial direction of the licker-in roller 2 is greater than the length of the cotton fiber, such as 20 to 80 mm. The combing needle teeth 11 and the licker-in roller rack 21 are in opposite directions, see Figure 3 a~ Figure 3 c The front angle α of the tooth bar of the combing needle 11 is -arcsin(h / c) to arcsin(h / c)°, the length of the cotton fiber is c=10 to 30 mm, the front angle β of the tooth bar 21 of the licker-in roller 2 is arcsin(h / c) to 36°, and the tooth bar density of the combing needle 11 is 30 to 100 teeth / 25 mm 2 .

[0037] That is, when the two ends of the cotton fiber are hooked and straightened by the licker-in roller rack 21 and the combing needle teeth 11 respectively, they receive pulling forces L of opposite directions and equal magnitudes respectively. The cotton fiber is subjected to the tooth front normal pressure Nc and the centrifugal force U at one end of the licker-in roller rack 21. The component of the tooth front normal pressure Nc is the combing force R. The value of the angle between the tooth front normal pressure Nc and the combing force R is equal to the value of the licker-in roller rack front angle β. The component of the tooth front normal pressure Nc in the licker-in roller normal direction is Ncsinβ, which is opposite to the direction of the centrifugal force U, so that the cotton fiber moves toward the root of the licker-in roller rack.

[0038] The cotton fiber is subjected to a pressure Np in front of the combing needle tooth rack at one end of the combing needle tooth 11. The pressure Np can be decomposed into a pulling force L along the direction of the cotton fiber and a component force fp perpendicular to the direction of the cotton fiber.

[0039] When the cotton fibers are straightened by the licker-in roller rack 21 and the comb needle teeth 11, the minimum angle between the cotton fibers and the licker-in roller surface is arcsin (3.5 / 30) = 6.69°;

[0040] like Figure 3 a. When the rack front angle α of the combing needle teeth 11 is set to 0°, the component force fp of the pressure Np perpendicular to the direction of the cotton fiber is directed toward the licker-in roller 2. The cotton fibers will not be hooked and pulled away from the tooth roots of the licker-in roller rack 21 by the combing needle teeth 11, that is, they will not leave the licker-in roller. However, the cotton fibers can be combed and straightened, and the fine impurities between the cotton fibers can be centrifuged.

[0041] like Figure 3 b. When the rack front angle α of the combing needle serrations 11 is set to -5°, the component force fp of the pressure Np perpendicular to the direction of the cotton fibers is directed toward the licker-in roller 2. The cotton fibers will not be hooked and pulled away from the tooth roots of the licker-in roller rack 21 by the combing needle serrations 11, that is, they will not leave the licker-in roller. However, the cotton fibers can be combed and straightened, and the fine impurities between the cotton fibers can be centrifuged. However, when the rack front angle α is smaller, the component force fp becomes larger, the pulling force L becomes smaller, the cotton fibers are not easy to be straightened, and the fine impurities between the cotton fibers are not easy to be exposed and centrifuged.

[0042] like Figure 3 c. When the rack front angle α of the combing needle teeth 11 is set to 5°, the pressure Np is almost coincident with the longitudinal direction of the cotton fiber, and no component force fp is generated. The cotton fiber will not be hooked and pulled away from the tooth root of the licker-in roller rack 21 by the combing needle teeth 11, that is, it will not leave the licker-in roller, and the cotton fiber can be better combed and straightened, and the fine impurities between the cotton fibers can be centrifuged.

[0043] like Figure 4 When the rack front angle α of the combing needle saw tooth 11 is set to be greater than arcsin(h / c)°, the component force fp of the pressure Np perpendicular to the direction of the cotton fiber is directed toward the combing needle saw tooth 11, and the cotton fiber will be hooked by the combing needle saw tooth 11 and pulled toward the root of the combing needle saw tooth, and some cotton fibers will be broken. If the rack front angle β of the licker-in roller is less than arcsin(h / c)°, the component force Nc in the normal direction of the licker-in roller of the normal pressure Nc in the tooth front direction will be Ncsinβ, which will be less than fp, that is, the cotton fiber will leave the licker-in roller, causing cotton fiber blockage.

[0044] As an implementation mode, the debris removal knife 1 forms an arc surface on the side facing the licker-in roller 2 to match the surface of the licker-in roller.

[0045] As an implementation mode, a groove 12 extending along the axial direction of the licker-in roller 2 is provided on the side of the debris removal knife 1 facing the licker-in roller 2 , and a combing plate 13 densely covered with combing needle teeth 11 is installed in the groove 12 .

[0046] The pulling force L on the cotton fiber is L=Rcos(arcsin(h / c)). The smaller the arcsin(h / c)° is, the greater the pulling force on the cotton fiber is, and the easier it is to overcome the elastic force between the cotton fibers and straighten them. Therefore, the trash removal knife 1 should be arranged close to the licker-in roller 2. If the mutual spacing is more than 5mm, the trash removal knife blade can be used to remove trash without damaging the cotton fibers. The rack rake angle α of the combing needle teeth is preferably -5~5°, which is smaller than the minimum value of arcsin(h / c)°. The discharged diameter is larger, but the cotton fibers are not damaged.

[0047] In Example 1, the distance between the surface of the impurity removal knife 1 facing the licker-in roller 2 and the licker-in roller 2 can also be set to 0.8-2 mm, so that the cotton fibers are more distributed on the tooth roots of the licker-in roller rack 21. At this time, the impurities that can be separated by the impurity removal knife 1 have a smaller diameter.

[0048] Example 2

[0049] like Figure 5 and Figure 2 , a cotton fiber trash removal structure, comprising: 2 licker-in rollers, a plurality of trash removal knives 1, the trash removal knife 1 is arranged on one side of the licker-in roller 2, the gap between the blade body of the trash removal knife 1 facing the licker-in roller 2 and the surface of the licker-in roller is adjustable from 0.6mm to 6mm, each trash removal knife 1 is densely covered with combing needle teeth 11 on the side facing the licker-in roller 2, and all the combing needle teeth 11 in any row distributed along the axis direction of the licker-in roller 2 are at the same distance from the surface of the licker-in roller 2, the distance between the blade tip 14 end and the blade heel 15 end of the trash removal knife 1 and the licker-in roller 2 is not greater than the distance from the blade heel to the licker-in roller 2, for example, according to the following adjustment, the blade tip end 14 is 0 away from the surface of the licker-in roller 2 .6mm, the distance from the heel end 15 to the surface of the licker-in roller 2 is 6mm, the arc length of the interval between adjacent trash removing knives 1 in the circumferential direction of the licker-in roller 2 is not less than the length of the cotton fiber, which is set to 20mm, the combing needle teeth 11 and the licker-in roller rack 21 are in opposite directions, the rack rake angle α of the combing needle teeth 11 is -arcsin(h / c)~arcsin(h / c)°, preferably 5°, the cotton fiber length is c=20mm, the rake-in roller rack 21 of the licker-in roller 2 has a rake angle β of arcsin(h / c)~36°, preferably 10~36°, so that the trash removing knives 1 of embodiment 2 can be installed more than those of embodiment 1, thereby improving the trash removing efficiency. As in Example 1, when the surface of the debris removal knife 1 is parallel to the surface of the licker-in roller 2, the rack front angle α of the combing needle teeth 11 will not cause the problems of cotton blockage and poor combing effect. The debris removal knife 1 of Example 2 is tilted compared with Example 1, which offsets the effect of the rack front angle α of the combing needle teeth 11 on the cotton fibers on the licker-in roller 2 to be detached, and the problem of cotton blockage will not occur. The value of the rack front angle α of the combing needle teeth 11 in Example 2 is larger than that in Example 1, and the cotton combing effect is better.

Claims

1. A cotton fiber impurity removal structure, comprising: A licker-in roller, a plurality of debris removal knives, characterized in that the debris removal knives are arranged on one side of the licker-in roller, the gap between the blade body of the licker-in roller facing the licker-in roller and the surface of the licker-in roller is 0.6mm-6mm, the side of each debris removal knife facing the licker-in roller is densely covered with combing needle serrations, and the distances from all the combing needle serrations in any row or each row of combing needle serrations distributed along the licker-in roller axis to the surface of the licker-in roller are equal; the combing needle serrations are spaced apart from the licker-in roller rack on the licker-in roller, and the spacing h is less than the distance between the heel end of the debris removal knife and the licker-in roller. The spacing of the racks, the distance between the tip end of the trash removal knife and the licker-in roller is not greater than the distance between the heel end of the knife and the licker-in roller, the arc length of the interval between adjacent trash removal knives in the circumferential direction of the licker-in roller is not less than the length of the cotton fiber, that is, greater than the length of the cotton fiber after being hooked and pulled by the licker-in roller, the direction of the comb needle teeth and the licker-in roller rack is opposite, the rack rake angle α of the comb needle teeth is -arcsin(h / c)~arcsin(h / c)º, the cotton fiber length is c, and the licker-in roller rack rake angle β of the licker-in roller is arcsin(h / c)~36º.

2. The cotton fiber impurity removal structure according to claim 1, characterized in that: The distances between the blade end of the debris removal knife and the blade heel end opposite to the blade end and the surface of the licker-in roller are adjustable.

3. The cotton fiber impurity removal structure according to claim 1, characterized in that: The rack spacing of the combing needle saw teeth is smaller than the rack winding spacing of the licker-in roller rack.

4. The cotton fiber impurity removal structure according to claim 1, characterized in that: The combing needle teeth form a combing surface on the surface of the debris removal knife. The length of the combing surface extending along the axial direction of the licker-in roller is greater than the axial length of the licker-in roller. The width of the combing surface in a direction perpendicular to the axial direction of the licker-in roller is greater than the length of the cotton fiber.

5. The cotton fiber impurity removal structure according to claim 1, characterized in that: The side of the debris removal knife facing the licker-in roller forms an arc surface matched with the surface of the licker-in roller.

6. The cotton fiber impurity removal structure according to claim 1, characterized in that: A groove extending along the axial direction of the licker-in roller is arranged on the side of the debris removal knife facing the licker-in roller, and a combing needle plate densely covered with combing needle teeth is installed in the groove.

7. The cotton fiber impurity removal structure according to any one of claims 1 to 6, characterized in that: The length of the cotton fiber is 10-30 mm, the rack height of the combing needle saw teeth is 0.6-1.5 mm, the rack rake angle α of the combing needle saw teeth is -5-5°, and the licker-in roller rack rake angle β of the licker-in roller is 10-36°.

Images