Dust removal device for circular knitting machine

Abstract

The utility model belongs to the technical field of textile equipment, and particularly relates to a dust removal device for a circular knitting machine, which comprises a circular knitting machine body, a dust hood is movably arranged above the circular knitting machine body, and lifting structures are arranged on two sides of the dust hood; the air exhaust structure is arranged on the outer side of the dust collection cover, and an air exhaust pipe is arranged between the air exhaust structure and the top of the dust collection cover in a communicating mode; the filter screen is detachably arranged between the air exhaust structure and the air exhaust pipe, a cleaning assembly is movably arranged on the side edge of the filter screen, and the cleaning assembly is used for cleaning soft flocks on the filter screen; the collecting structure is arranged below the filter screen and is used for collecting the cleaned soft flocks; and a rotating part is rotationally arranged in the collecting structure, the rotating part can clean the cleaning assembly, and an air inlet is formed in the bottom of the dust suction cover. And the effects of conveniently cleaning the surface of the filter screen, reducing the maintenance frequency and improving the production efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of textile equipment, and in particular relates to a dust removal device for a circular knitting machine. Background Art

[0002] Circular knitting machine, scientifically known as circular weft knitting machine, is widely used in the textile industry because of its multiple loop forming systems, high speed, high output, fast pattern change, good fabric quality, few processes and strong product adaptability. During the operation of the circular knitting machine, the yarn is constantly wrapped around it, which will produce a lot of dust and hair. The large accumulation of dust and hair on the circular knitting machine will affect the normal operation of the circular knitting machine, so a dust removal device is needed to remove the dust from the circular knitting machine.

[0003] Chinese utility model patent CN220485979U discloses a dust removal device for a large circular knitting machine, comprising a machine body and a large circular knitting machine body, a lifting assembly is provided at the bottom of the machine body, a dust suction assembly is provided in the middle of the lifting assembly, a dust storage box is movably connected to the top of the lifting assembly, two cylinders are fixedly connected to the bottom inner wall of the dust storage box, and one end of the two cylinders is fixedly connected to a baffle; the dust suction assembly comprises a dust hood, and the improved dust removal device sucks the dust on the large circular knitting machine body into the dust storage box through the exhaust fan and the dust hood. Compared with the traditional jet dust removal method, the suction dust removal will not blow the dust on the large circular knitting machine into the workshop to affect the health of the workers. The central axis of the dust hood coincides with the central axis of the large circular knitting machine body, so that the dust hood covers the large circular knitting machine body directly above, thereby performing all-round dust removal on the outer ring knitting part of the large circular knitting machine body, and the dust removal is more comprehensive.

[0004] However, when the filter surface is cleaned by the cleaning component, the hair debris cleaned will be entangled on the lint sticking roller. As the amount of hair debris attached to the lint sticking roller increases, the lint sticking efficiency gradually decreases. In order to ensure the filtering efficiency of the filter, the lint sticking roller needs to be cleaned or replaced frequently, which is not conducive to improving production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a dust removal device for a circular knitting machine in order to solve the above-mentioned technical problems, so as to facilitate the cleaning of the filter surface, reduce the maintenance frequency and improve the production efficiency.

[0006] In view of this, the utility model provides a dust removal device for a circular knitting machine, which is characterized by comprising:

[0007] A large circular knitting machine body, wherein a dust hood is movably arranged above the large circular knitting machine body, and lifting structures are arranged on both sides of the dust hood;

[0008] An air extraction structure, wherein the air extraction structure is arranged outside the dust hood and an air extraction pipe is arranged between the air extraction structure and the top of the dust hood;

[0009] A filter screen, wherein the filter screen is detachably arranged between the air extraction structure and the air extraction pipe, and a cleaning component is movably arranged on the side of the filter screen, and the cleaning component is used to clean the hair debris on the filter screen;

[0010] A collecting structure, which is arranged below the filter screen and is used to collect the cleaned hair debris;

[0011] Wherein, a rotating part is rotatably arranged in the collection structure, and the rotating part can clean the cleaning component, and an air inlet is arranged at the bottom of the dust hood.

[0012] In the technical solution, during the working process, the lifting structure can be used to control the lifting of the dust hood. When the dust hood moves downward to cooperate with the large circular knitting machine, the exhaust is exhausted to the outside through the exhaust structure, so that the external air can flow from bottom to top through the air inlet set at the bottom of the dust hood, absorb the hair debris generated during the production process of the large circular knitting machine, and separate the hair debris from the air through the filter. Through the cooperation between the cleaning component and the collection structure, the filtered hair debris can be collected, and the cleaning component can be cleaned by the rotating part in the collection structure, which is conducive to improving the cleaning efficiency of the cleaning component and reducing the frequency of maintenance.

[0013] In the above technical solution, further, the cleaning component includes:

[0014] A reciprocating structure, wherein the reciprocating structure is symmetrically arranged on the inner wall of the air extraction pipe and located on both sides of the filter screen;

[0015] The brush is detachably arranged between the reciprocating structures and contacts the surface of the filter screen.

[0016] In the present technical solution, the reciprocating structure is arranged to drive the brush to move up and down, so that the brush can clean the hair debris attached to the surface of the filter, which is beneficial to maintain the filtering efficiency of the filter and reduce the frequency of maintenance.

[0017] In the above technical solution, further, the reciprocating structure includes:

[0018] Lifting grooves, which are symmetrically arranged on the inner wall of the exhaust pipe and on both sides of the filter screen;

[0019] A reciprocating screw rod, wherein the reciprocating screw rod is arranged in a lifting groove on one side, and a polished rod is arranged in the lifting groove on the other side;

[0020] An air avoidance groove, wherein the air avoidance groove is arranged above the lifting groove on which the reciprocating screw rod is installed, and a stopper is arranged between the air avoidance groove and the lifting groove;

[0021] A slider, which is symmetrically arranged in the air extraction pipe and is slidably connected to the lifting slot;

[0022] A first motor, wherein the first motor is arranged on the outer wall of the air extraction pipe, and an output shaft passes through the air extraction pipe and extends into the air avoidance groove;

[0023] A first bevel gear, the first bevel gear is arranged on the output shaft of the first motor, and a second bevel gear is arranged on the side in meshing engagement, and the second bevel gear is arranged on the top end of the reciprocating screw rod;

[0024] Wherein, the lifting slot, reciprocating screw rod and polished rod all extend into the collecting structure.

[0025] In the present technical solution, the first motor drives the first bevel gear and the second bevel gear to rotate, which can drive the reciprocating screw to rotate, thereby driving the slider to move up and down along the lifting groove, and by extending the lifting groove, the reciprocating screw, and the light rod into the collecting structure, it is convenient for the rotating part in the collecting structure to clean the brush, so that the hair debris attached to the brush falls into the collecting structure, which is beneficial to improve the cleaning efficiency of the brush and reduce the frequency of maintenance.

[0026] In the above technical solution, further, the collection structure includes:

[0027] A collecting box, which is arranged below the filter screen and is connected to the air extraction pipe;

[0028] A sealing door, which is arranged on the side of the collection box and is used to take out the hair scraps in the collection box;

[0029] A compression structure, which is arranged in the collection box and can divide the interior of the collection box into two layers, an upper layer and a lower layer;

[0030] A rotating shaft, which is rotatably disposed in the upper layer of the collecting box and is disposed on the side of the lifting slot;

[0031] Cleaning rods, the cleaning rods are evenly distributed on the surface of the rotating shaft in the circumferential direction, and a plurality of cleaning rods are provided;

[0032] A second motor, wherein the second motor is arranged on the outer wall of the collection box, and an output shaft is connected to the rotating shaft.

[0033] In the present technical solution, the second motor can drive the rotating shaft and the cleaning rod to rotate. When the brush drops to the same height as the rotating shaft, the rotating cleaning rod can be inserted into the brush to clean the hair debris on the brush, and the cleaned hair debris falls into the collection box. The compression structure provided in the collection box can compress the hair debris to reduce the volume of the hair debris, making it convenient for maintenance personnel to clean the compressed hair debris from the sealed door, which is beneficial to improving production efficiency.

[0034] In the above technical solution, further, the compression structure includes:

[0035] A telescopic cylinder, which is arranged in the lower layer of the collection box and is far away from the sealing door;

[0036] A push plate, which is slidably disposed in the collection box and connected to the output shaft of the telescopic cylinder;

[0037] A fixed block, which is arranged in the collection box and is located above the push plate;

[0038] A movable plate, which is arranged below the rotating shaft and is hinged;

[0039] Wherein, the hinge point of the movable plate is arranged close to the telescopic cylinder.

[0040] In this technical solution, when the telescopic cylinder and the push plate are in place, the movable plate tilts downward, and the hair chips fall into the lower layer of the collection box through the tilted movable plate. When the push plate is pushed to move by the telescopic cylinder, the hair chips in the lower layer of the collection box can be compressed, which helps to reduce the volume of the hair chips, making it easier for operators to clean the hair chips and improving production efficiency.

[0041] In the above technical solution, further, the top surface of the fixing block is set as an inclined surface.

[0042] In the technical solution, the inclined surface can prevent hair debris from falling onto the fixed block, thereby improving the collection efficiency.

[0043] In the above technical solution, further, the push plate is set in an "L" shape, and its long side is in contact with the bottom surface of the fixed block, and the length of the long side is greater than the length of the bottom surface of the fixed block.

[0044] In the present technical solution, the "L"-shaped push plate can ensure that the movable plate is always in a closed state when the push plate moves forward, which can prevent the hair debris on the upper layer of the collection box from falling between the telescopic cylinder and the push plate, and can also ensure that the push plate can be retracted normally, which is beneficial to improving the stability of the device.

[0045] In the above technical solution, further, a reinforcing rod is provided between the air extraction pipe and the outer wall of the dust hood.

[0046] In the present technical solution, the strength of the exhaust pipe can be improved by providing a reinforcing rod, which is beneficial to extending the service life of the device.

[0047] The beneficial effects of the utility model are:

[0048] 1. Through the cooperation between the cleaning component and the collecting structure, the filtered hair debris can be collected, and the cleaning component can be cleaned through the rotating part in the collecting structure, which is beneficial to improve the cleaning efficiency of the cleaning component and reduce the frequency of maintenance.

[0049] 2. The second motor can drive the rotating shaft and the cleaning rod to rotate. When the brush drops to the same height as the rotating shaft, the rotating cleaning rod can be inserted into the brush to clean the hair debris on the brush, and the cleaned hair debris falls into the collection box. The compression structure provided in the collection box compresses the hair debris to reduce the volume of the hair debris, making it convenient for maintenance personnel to clean the compressed hair debris from the sealed door, which is beneficial to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0051] Figure 2 It is a cross-sectional view of the utility model;

[0052] Figure 3 It is a left partial sectional view of the utility model;

[0053] Figure 4 This utility model Figure 3 A magnified image of the middle A area;

[0054] Figure 5 This utility model Figure 3 Enlarged view of area B;

[0055] The symbols in the figure are:

[0056] 1. Large circular knitting machine body; 2. Dust hood; 3. Lifting structure; 4. Exhaust pipe; 5. Exhaust structure; 6. Brush; 7. Collection structure; 701. Collection box; 702. Sealing door; 703. Rotating shaft; 704. Cleaning rod; 705. Second motor; 8. Filter; 9. Reciprocating structure; 901. Lifting slot; 902. Reciprocating screw rod; 903. Sliding block; 904. Avoiding slot; 905. First motor; 906. First bevel gear; 907. Second bevel gear; 908. Stopper; 10. Compression structure; 1001. Telescopic cylinder; 1002. Push plate; 1003. Fixed block; 1004. Movable plate; 11. Air inlet; 12. Reinforcement rod. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0058] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0059] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0060] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0061] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0062] Embodiment 1:

[0063] Depend on Figure 1-Figure 3 As shown, the present embodiment provides a dust removal device for a circular knitting machine, comprising: a circular knitting machine body 1, a dust hood 2 is movably provided above the circular knitting machine body 1, and lifting structures 3 are provided on both sides of the dust hood 2; an exhaust structure 5, the exhaust structure 5 is arranged on the outside of the dust hood 2, and an exhaust pipe 4 is provided in communication with the top of the dust hood 2; a filter 8, the filter 8 is detachably arranged between the exhaust structure 5 and the exhaust pipe 4, and a cleaning component is movably provided on the side of the filter 8, and the cleaning component is used to clean the hair debris on the filter 8; a collecting structure 7, the collecting structure 7 is arranged below the filter 8, and is used to collect the cleaned hair debris; wherein a rotating part is rotatably provided in the collecting structure 7, and the rotating part can clean the cleaning component, and an air inlet 11 is provided at the bottom of the dust hood 2.

[0064] During operation, the lifting structure 3 is used to control the lifting of the dust hood 2. When the dust hood 2 moves downward to cooperate with the large circular knitting machine, the exhaust is exhausted to the outside through the exhaust structure 5, so that the external air can flow from bottom to top through the air inlet 11 set at the bottom of the dust hood 2, and the hair debris generated during the production process of the large circular knitting machine is adsorbed, and the hair debris is separated from the air through the filter 8. Through the cooperation between the cleaning component and the collection structure 7, the filtered hair debris can be collected, and the cleaning component can be cleaned by the rotating part in the collection structure 7, which is conducive to improving the cleaning efficiency of the cleaning component and reducing the frequency of maintenance.

[0065] Furthermore, the cleaning component includes: a reciprocating structure 9, which is symmetrically arranged on the inner wall of the exhaust pipe 4 and located on both sides of the filter 8; a brush 6, which is detachably arranged between the reciprocating structure 9 and contacts the surface of the filter 8.

[0066] The reciprocating structure 9 can drive the brush 6 to move up and down, so that the brush 6 can clean the hair debris attached to the surface of the filter screen 8, which is beneficial to maintain the filtering efficiency of the filter screen 8 and reduce the frequency of maintenance.

[0067] Embodiment 2:

[0068] Depend on Figure 1-Figure 5 As shown, this embodiment provides a dust removal device for a circular knitting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0069] Furthermore, the reciprocating structure 9 includes: a lifting groove 901, which is symmetrically arranged on the inner wall of the exhaust pipe 4 and arranged on both sides of the filter screen 8; a reciprocating screw rod 902, which is arranged in the lifting groove 901 on one side, and a light rod (not marked) is arranged in the lifting groove 901 on the other side; an air avoidance groove 904, which is arranged above the lifting groove 901 on which the reciprocating screw rod 902 is installed, and a stopper 908 is arranged between the lifting groove 901 and the sliding block 903, which is arranged on the lifting groove 901; and a sliding block 903. It is arranged in the exhaust pipe 4 and is slidably connected to the lifting groove 901; the first motor 905, the first motor 905 is arranged on the outer wall of the exhaust pipe 4, and the output shaft passes through the exhaust pipe 4 and extends to the air avoidance groove 904; the first bevel gear 906, the first bevel gear 906 is arranged on the output shaft of the first motor 905, and the second bevel gear 907 is meshed on the side, and the second bevel gear 907 is arranged on the top of the reciprocating screw rod 902; wherein the lifting groove 901, the reciprocating screw rod 902, and the light rod all extend to the collecting structure 7.

[0070] The first motor 905 drives the first bevel gear 906 and the second bevel gear 907 to rotate, which can drive the reciprocating screw 902 to rotate, thereby driving the slider 903 to move up and down along the lifting groove 901, and by extending the lifting groove 901, the reciprocating screw 902, and the light rod to the collecting structure 7, it is convenient for the rotating part in the collecting structure 7 to clean the brush 6, so that the hair debris attached to the brush 6 falls into the collecting structure, which is beneficial to improve the cleaning efficiency of the brush 6 and reduce the frequency of maintenance.

[0071] Furthermore, the collecting structure 7 includes: a collecting box 701, which is arranged below the filter screen 8 and is connected to the exhaust pipe 4; a sealing door 702, which is arranged on the side of the collecting box 701 to remove hair debris in the collecting box 701; a compression structure 10, which is arranged in the collecting box 701, and the interior of the collecting box 701 can be divided into an upper and lower layer through the compression structure 10; a rotating shaft 703, which is rotatably arranged in the upper layer of the collecting box 701 and is arranged on the side of the lifting groove 901; a cleaning rod 704, which is evenly distributed on the surface of the rotating shaft 703 in the circumferential direction, and a plurality of cleaning rods are arranged; a second motor 705, which is arranged on the outer wall of the collecting box 701, and the output shaft is connected to the rotating shaft 703.

[0072] The second motor 705 can drive the rotating shaft 703 and the cleaning rod 704 to rotate. When the brush 6 drops to the same height as the rotating shaft 703, the rotating cleaning rod 704 can be inserted into the brush 6 to clean the hair debris on the brush 6, and the cleaned hair debris falls into the collection box 701. The compression structure 10 set in the collection box 701 compresses the hair debris to reduce the volume of the hair debris, making it convenient for maintenance personnel to clean the compressed hair debris from the sealing door 702, which is beneficial to improving production efficiency.

[0073] Embodiment 3:

[0074] Depend on Figure 1-Figure 5 As shown, this embodiment provides a dust removal device for a circular knitting machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0075] Furthermore, the compression structure 10 includes: a telescopic cylinder 1001, which is arranged in the lower layer of the collection box 701 and away from the sealing door 702; a push plate 1002, which is slidably arranged in the collection box 701 and connected to the output shaft of the telescopic cylinder 1001; a fixed block 1003, which is arranged in the collection box 701 and located above the push plate 1002; a movable plate 1004, which is arranged below the rotating shaft 703 and is hinged; wherein the hinge point of the movable plate 1004 is arranged close to the telescopic cylinder 1001.

[0076] When the telescopic cylinder 1001 and the push plate 1002 are in place, the movable plate 1004 tilts downward, and the hair debris falls into the lower layer of the collection box 701 through the tilted movable plate 1004. When the push plate 1002 is pushed to move by the telescopic cylinder 1001, the hair debris in the lower layer of the collection box 701 can be compressed, which helps to reduce the volume of the hair debris, making it easier for operators to clean the hair debris and improve production efficiency.

[0077] Furthermore, the top surface of the fixing block 1003 is configured as an inclined surface.

[0078] The inclined surface can prevent hair scraps from falling onto the fixed block 1003, thereby improving the collection efficiency.

[0079] Furthermore, the push plate 1002 is set in an “L” shape, and its long side is in contact with the bottom surface of the fixing block 1003, and the length of the long side is greater than the length of the bottom surface of the fixing block 1003.

[0080] The "L"-shaped push plate 1002 can ensure that the movable plate 1004 is always in a closed state when the push plate 1002 moves forward, which can prevent the hair debris on the upper layer of the collection box 701 from falling between the telescopic cylinder 1001 and the push plate 1002, and can also ensure that the push plate 1002 can be retracted normally, which is beneficial to improving the stability of the device.

[0081] Furthermore, a reinforcing rod 12 is provided between the exhaust pipe 4 and the outer wall of the dust hood 2 .

[0082] The reinforcement rod 12 can improve the strength of the exhaust pipe 4, which is beneficial to prolonging the service life of the device.

[0083] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the inspiration of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A dust removal device for a circular knitting machine, characterized in that ,include: A circular knitting machine body (1), wherein a dust hood (2) is movably arranged above the circular knitting machine body (1), and lifting structures (3) are arranged on both sides of the dust hood (2); An air extraction structure (5), wherein the air extraction structure (5) is arranged outside the dust hood (2), and an air extraction pipe (4) is arranged in communication with the top of the dust hood (2); A filter screen (8), the filter screen (8) being detachably arranged between the air extraction structure (5) and the air extraction pipe (4), and a cleaning component being movably arranged on the side of the filter screen (8), the cleaning component being used to clean hair scraps on the filter screen (8); A collecting structure (7), the collecting structure (7) being arranged below the filter screen (8) and used for collecting the cleaned hair scraps; Wherein, a rotating part is rotatably arranged in the collection structure (7), and the rotating part can clean the cleaning component, and an air inlet (11) is arranged at the bottom of the dust hood (2).

2. A dust removal device for a circular knitting machine according to claim 1, characterized in that: The cleaning component includes: A reciprocating structure (9), wherein the reciprocating structure (9) is symmetrically arranged on the inner wall of the air extraction pipe (4) and located on both sides of the filter screen (8); A brush (6) is detachably arranged between the reciprocating structures (9) and is in contact with the surface of the filter screen (8).

3. A dust removal device for a circular knitting machine according to claim 2, characterized in that: The reciprocating structure (9) comprises: A lifting groove (901), wherein the lifting groove (901) is symmetrically arranged on the inner wall of the air extraction pipe (4) and arranged on both sides of the filter screen (8); A reciprocating screw rod (902), wherein the reciprocating screw rod (902) is arranged in the lifting groove (901) on one side, and a polished rod is arranged in the lifting groove (901) on the other side; An air avoidance groove (904), wherein the air avoidance groove (904) is arranged above the lifting groove (901) on which the reciprocating screw rod (902) is installed, and a stopper (908) is arranged between the air avoidance groove (904) and the lifting groove (901); A slider (903), wherein the slider (903) is symmetrically arranged in the air extraction pipe (4) and is slidably connected to the lifting groove (901); A first motor (905), wherein the first motor (905) is arranged on the outer wall of the air extraction pipe (4), and the output shaft passes through the air extraction pipe (4) and extends into the air avoidance groove (904); A first bevel gear (906), the first bevel gear (906) is arranged on the output shaft of the first motor (905), and a second bevel gear (907) is arranged on the side in meshing engagement, and the second bevel gear (907) is arranged on the top of the reciprocating screw rod (902); Wherein, the lifting groove (901), the reciprocating screw rod (902), and the light rod all extend into the collecting structure (7).

4. A dust removal device for a circular knitting machine according to any one of claims 1 to 3, characterized in that: The collecting structure (7) comprises: A collection box (701), wherein the collection box (701) is arranged below the filter screen (8) and is connected to the air extraction pipe (4); A sealing door (702), the sealing door (702) being arranged on the side of the collection box (701) and used for taking out hair scraps in the collection box (701); A compression structure (10), wherein the compression structure (10) is arranged in the collection box (701), and the interior of the collection box (701) can be divided into two layers, an upper layer and a lower layer, by the compression structure (10); A rotating shaft (703), the rotating shaft (703) is rotatably disposed in the upper layer of the collecting box (701) and is disposed on the side of the lifting slot (901); Cleaning rods (704), wherein the cleaning rods (704) are evenly distributed on the surface of the rotating shaft (703) in the circumferential direction, and a plurality of cleaning rods (704) are provided; A second motor (705), wherein the second motor (705) is arranged on the outer wall of the collection box (701), and the output shaft is connected to the rotating shaft (703).

5. A dust removal device for a circular knitting machine according to claim 4, characterized in that: The compression structure (10) comprises: A telescopic cylinder (1001), wherein the telescopic cylinder (1001) is arranged in the lower layer of the collection box (701) and is arranged away from the sealing door (702); A push plate (1002), the push plate (1002) is slidably disposed in the collection box (701) and is connected to the output shaft of the telescopic cylinder (1001); A fixed block (1003), the fixed block (1003) is arranged in the collection box (701) and is located above the push plate (1002); A movable plate (1004), wherein the movable plate (1004) is arranged below the rotating shaft (703) and is hinged; Wherein, the hinge point of the movable plate (1004) is arranged close to the telescopic cylinder (1001).

6. A dust removal device for a circular knitting machine according to claim 5, characterized in that: The top surface of the fixing block (1003) is configured as an inclined surface.

7. A dust removal device for a circular knitting machine according to claim 5, characterized in that: The push plate (1002) is arranged in an "L" shape, and its long side is in contact with the bottom surface of the fixing block (1003), and the length of the long side is greater than the length of the bottom surface of the fixing block (1003).

8. A dust removal device for a circular knitting machine according to claim 1, characterized in that: A reinforcing rod (12) is provided between the air extraction pipe (4) and the outer wall of the dust collection hood (2).

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