CN117071121A - Carding machine doffer air blowing device - Google Patents

Abstract

The invention provides a doffer blowing device of a carding machine, and belongs to the technical field of carding machines. The doffer blowing device of the carding machine comprises a main frame, a cutter is arranged on the top surface of the cutter frame, a blowing assembly comprises a vertical plate and a blowing cylinder, the vertical plate is fixedly arranged on the top surface of the C-shaped frame, the blowing cylinder is fixedly sleeved in the vertical plate, a plurality of blowing holes are formed in the bottom surface of the blowing cylinder at equal intervals, and the blowing cylinder is arranged above the cutter. According to the invention, by starting the air compressor, generated gas can enter the connecting cylinder through the delivery of the gas pipe and finally enter the blowing cylinder through the connecting cylinder, and then the gas is sprayed downwards through the blowing hole to blow down the broken fluff between the chopper and the elastic clothing into the collecting box for uniform collection, so that the purpose of blowing down the broken fluff generated between the chopper and the elastic clothing from the chopper and the elastic clothing is realized.

Description

Carding machine doffer air blowing device

Technical field

The present invention relates to the technical field of carding machines, and specifically to the doffer air blowing device of the carding machine.

Background technique

Carding machine is a machine that converts loose fibers into slivers in wool spinning production. Its main function is to loosen messy fibers into relatively straight single fibers, remove impurities, and mix fibers with different colors or qualities for rough processing. The carding machine of carding spinning is generally composed of a two-link or three-link roller carding machine. The raw materials are fed by an automatic wool feeding machine. There is a curtain that automatically transports semi-finished products between each section of the roller carding machine. From the last section of the roller carding machine The output wool web is divided into narrow strips and twisted into roving for spinning on the spinning frame.

Since the traditional carding machine doffer uses a chopper to peel off the wool net, there is no problem under normal production conditions. However, in the early stage of the last batch and the batch was finished, the amount of doffer fluff was very small, so the chopper could not smoothly remove the doffer from the doffer. Peel off the wool net and let a small amount of fluff roll between the doffer and the chopper to form a hard felt. This makes it easy for the hard felt to squeeze out between the doffer and the chopper and damage the elastic card clothing on the doffer.

Contents of the invention

In order to make up for the above shortcomings, the present invention provides a card doffer air blowing device that overcomes the above technical problems or at least partially solves the above problems.

The present invention is implemented as follows:

The invention provides a doffer blowing device for a carding machine, which includes a main frame. A rotating shaft is rotatably installed inside the main frame. A doffer is fixedly connected to the outer surface of the rotating shaft. The outer surface of the doffer is covered with elastic card clothing. A C-shaped frame is fixedly installed on one side surface of the main frame, a knife holder is provided on the top surface of the C-shaped frame, and a chopping knife is installed on the top surface of the knife holder;

Air blowing assembly, the air blowing assembly includes a vertical plate and an air blowing tube. The vertical plate is fixedly installed on the top surface of the C-shaped frame. The air blowing tube is fixedly sleeved inside the vertical plate. The bottom surface of the air blowing tube, etc. A plurality of blowing holes are provided at intervals, and the blowing tube is arranged above the chopping knife;

Collection assembly, the collection assembly includes a collection box, the collection box is fixedly installed on one side surface of the main frame and is located below the C-shaped frame. The collection assembly is configured to collect the broken fluff blown by the blower. ;

The adsorption component is arranged inside the collection box, and the adsorption component is arranged to adsorb the broken fluff collected inside the collection box.

In a preferred solution, an air compressor is fixedly installed on one side surface of the main frame, an air outlet of the air compressor is fixedly connected to an air pipe, and one end of the air pipe is fixedly connected to one end of the connecting tube. The connecting tube is plugged into the inside of the blowing tube.

In a preferred solution, two baffles are movably connected inside the collection box, and the two baffles are arranged facing each other. Sealing sleeves are fixedly installed on both sides of the collection box. A movable sleeve is movable inside the sleeve. A sealing plate is fixedly installed on one side of the movable sleeve. An L-shaped plate is provided between the sealing plate and the baffle. One end of the L-shaped plate is connected to the baffle. The top surface of the sealing plate is fixedly connected, and the other end of the L-shaped plate is fixedly connected to one side surface of the baffle.

In a preferred solution, a connecting pipe is installed on the outer surface of the gas pipe, and a three-way valve is provided between the gas pipe and the connecting pipe. The gas pipe and the connecting pipe are connected to each other through a three-way valve, so One end of the connecting pipe is fixedly connected to a ventilation frame, and both ends of the top surface of the ventilation frame are fixedly connected to communicating pipes. The communicating pipes are fixedly connected to the bottom surface of the sealing sleeve and extend to the inside of the sealing sleeve.

In a preferred solution, a solenoid valve is installed on the outer surface of the connecting pipe, and a pressure relief valve is installed on the bottom surface of the movable sleeve.

In a preferred solution, the adsorption assembly includes a plurality of fixed sleeves, and the plurality of fixed sleeves are all equidistantly installed on the bottom surface of the collection box. The inside of the fixed sleeve All are equipped with fans.

In a preferred solution, mounting plates are fixedly installed on both ends of the top surface of the collection box, a touch switch is fixedly installed on one side surface of the installation plate, and a touch switch is fixedly installed on the top surface of the baffle. Touch plate, the touch switch is electrically connected to the fan.

In a preferred solution, a partition net is fixedly installed inside the collection box, and the partition net is arranged above the fixed sleeve.

In a preferred solution, a mounting base is fixedly installed on the top surface of the C-shaped frame, a threaded rod is rotatably mounted inside the mounting base, and a clamping plate is movablely engaged inside the mounting base. A threaded hole is provided inside the connecting plate, and the clamping plate is threadedly connected to a threaded rod through the threaded hole, and a knob is fixedly installed at one end of the threaded rod.

In a preferred solution, a reset column is provided between the L-shaped plate and the collection box. The reset column includes an installation sleeve. A return spring and a movable column are provided inside the installation sleeve. The movable column The movable sleeve is connected inside the installation sleeve. One end of the return spring is fixedly connected to the bottom surface of the movable column. The other end of the return spring is fixedly connected to the bottom surface of the movable column. One end of the movable column is connected to the L-shaped plate. One side surface is fixedly connected, and one side surface of the installation sleeve is fixedly connected to one side surface of the collection box.

The beneficial effects of the carding machine doffer air blowing device provided by the present invention include:

1. By setting up the blowing component and starting the air compressor, the generated gas will enter the inside of the connecting tube through the air pipe, and finally enter the inside of the blowing tube through the connecting tube, and then downward through the blowing hole. The broken fluff between the chopping knife and the elastic card clothing is blown out to the inside of the collection box for uniform collection, thereby achieving the ability to remove the broken fluff generated between the chopping knife and the elastic card clothing from the chopping knife and the elastic card clothing. The purpose of blowing off between cloths is to avoid the existing small amount of fluff from tumbling between the doffer and the elastic card clothing to form a hard felt. This makes it easy for the hard felt to squeeze out between the doffer and the elastic card clothing and damage the elasticity of the doffer. Card clothing problem.

2. By setting up the collection component, the gas generated when the air compressor is started will enter the inside of the connecting pipe through the gas pipe, and then be transported to the inside of the ventilation frame through the connecting pipe, and finally enter the sealing sleeve through the connecting pipe. Inside the barrel, as the gas continues to enter, the gas inside the sealing sleeve and the movable sleeve continues to increase, pushing the movable sleeve to move outward, and the L-shaped plate drives the baffles to move to both sides inside the collection box, and the The top surface of the collection box is opened, so that the blown down fluff can smoothly enter the inside of the collection box for unified collection.

3. By setting up the adsorption component, during the movement of the baffle, the touch plate is brought into contact with the touch switch on one side of the installation plate, and then the touch switch can be used to control the start of multiple fans inside the collection box, and the fans generate downward movement. The suction power can easily suck the blown down lint into the inside of the collection box, and tightly adsorb the lint on the top surface of the partition screen to prevent the lint inside the collection box from scattering with the wind.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is an overall perspective view provided by an embodiment of the present invention;

Figure 2 is a schematic cross-sectional structural diagram of an air blowing pipe provided by an embodiment of the present invention;

Figure 3 is a schematic structural diagram of a chopping knife provided by an embodiment of the present invention;

Figure 4 is a schematic structural diagram of a collection box provided by an embodiment of the present invention;

Figure 5 is a schematic cross-sectional structural diagram of the sealing sleeve provided by the embodiment of the present invention;

Figure 6 is a schematic bottom structural diagram of the collection box provided by the embodiment of the present invention;

Figure 7 is a schematic cross-sectional structural diagram of a collection box provided by an embodiment of the present invention;

Figure 8 is a schematic structural diagram of a reset column provided by an embodiment of the present invention.

In the picture: 1. Main frame; 2. Rotating shaft; 3. Doffer; 4. Elastic card cloth; 5. C-shaped frame; 6. Knife holder; 7. Chopping knife; 8. Vertical plate; 9. Air blower; 10. Connecting tube; 11. Air compressor; 12. Gas pipe; 13. Three-way valve; 14. Connecting pipe; 15. Solenoid valve; 16. Collection box; 17. Blow hole; 18. Baffle; 19. L-shaped plate ; 20. Sealing sleeve; 21. Movable sleeve; 22. Sealing plate; 23. Pressure relief valve; 24. Connecting pipe; 25. Ventilation frame; 26. Reset column; 27. Fixed sleeve; 28. Fan; 29 , Partition screen; 30. Installation plate; 31. Touch switch; 32. Touch plate; 33. Installation sleeve; 34. Movable column; 35. Return spring; 36. Mounting seat; 37. Snap plate; 38. Threaded rod; 39. Knob.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example

Referring to Figures 1 to 8, the present invention provides a technical solution: a doffer blowing device for a carding machine, including a main frame 1. A rotating shaft 2 is installed inside the main frame 1, and a doffer 3 is fixedly connected to the outer surface of the rotating shaft 2. The outer surface of the doffer 3 is covered with elastic card clothing 4, and a C-shaped frame 5 is fixedly installed on one side surface of the main frame 1. A knife rest 6 is provided on the top surface of the C-shaped frame 5, and a knife rest 6 is installed on the top surface of the knife rest 6. Knife 7;

A mounting base 36 is fixedly installed on the top surface of the C-shaped frame 5. A threaded rod 38 is rotatably installed inside the mounting base 36. A clamping plate 37 is movably engaged with the mounting base 36, and a threaded hole is provided inside the clamping plate 37. , the clamping plate 37 is threadedly connected to the threaded rod 38 through the threaded hole, and a knob 39 is fixedly installed on one end of the threaded rod 38. Through the provided mounting base 36, the clamping plate 37, the threaded rod 38 and the knob 39, the threaded rod 38 can be rotated Rod 38, thereby driving the clamping plate 37 to move back and forth inside the mounting seat 36 under the action of the thread, thereby realizing flexible adjustment of the position of the chopping knife 7, that is, between the chopping knife 7 and the woolen mesh on the outer surface of the elastic card cloth 4 The spacing between them can be flexibly adjusted.

The air blowing assembly includes a vertical plate 8 and an air blowing tube 9. The vertical plate 8 is fixedly installed on the top surface of the C-shaped frame 5. The air blowing tube 9 is fixedly connected to the inside of the vertical plate 8. The bottom surface of the air blowing tube 9 is provided with a plurality of equidistant The air blowing hole 17 and the air blowing tube 9 are arranged above the chopping knife 7. An air compressor 11 is fixedly installed on one side of the main frame 1. The air outlet of the air compressor 11 is fixedly connected to an air pipe 12. One end of the air pipe 12 is connected to the air pipe 12. One end of the connecting tube 10 is fixedly connected, and the connecting tube 10 is plugged into the inside of the blowing tube 9. The length and size of the blowing tube 9 can be adapted and installed according to the specific machine size. By starting the air compressor 11, the gas generated It will enter the inside of the connecting tube 10 through the transportation of the air pipe 12, and finally enter the inside of the blowing tube 9 through the connecting tube 10, and then spray downward through the blowing hole 17, connecting the chopping knife 7 and the elastic card clothing 4 The broken fluff between the chopping knife 7 and the elastic card clothing 4 is blown down to the inside of the collection box 16 for unified collection, thereby realizing the method of blowing off the broken fluff generated between the chopping knife 7 and the elastic card clothing 4 from between the chopping knife 7 and the elastic card clothing 4 The purpose is to use the blowing method during the initial stage and batch processing of the previous batch to prevent hard felt from forming between the elastic card clothing 4 and the chopping knife 7, and to directly blow off a small amount of fluff on the elastic card clothing 4 to prevent the The fluff rolls between the elastic card clothing 4 and the chopper 7, thus protecting the elastic card clothing 4;

The collection assembly includes a collection box 16. The collection box 16 is fixedly installed on one side surface of the main frame 1 and is located below the C-shaped frame 5. The collection assembly is used to collect the broken fluff blown by the blower 9. The collection box 16 There are two baffles 18 that are movablely connected inside, and the two baffles 18 are set opposite each other. Sealing sleeves 20 are fixedly installed on both sides of the collection box 16, and a movable sleeve 21 is movable inside the sealing sleeve 20. , a sealing plate 22 is fixedly installed on one side surface of the movable sleeve 21, an L-shaped plate 19 is provided between the sealing plate 22 and the baffle 18, one end of the L-shaped plate 19 is fixedly connected to the top surface of the sealing plate 22, the L-shaped The other end of the plate 19 is fixedly connected to one side surface of the baffle 18. A connecting pipe 14 is installed on the outer surface of the gas pipe 12. A three-way valve 13 is provided between the gas pipe 12 and the connecting pipe 14. The gas pipe 12 and the connecting pipe 14 They are connected to each other through a three-way valve 13. One end of the connecting pipe 14 is fixedly connected to a ventilation frame 25. Both ends of the top surface of the ventilation frame 25 are fixedly connected to a communicating pipe 24. The communicating pipe 24 is fixedly connected to the bottom surface of the sealing sleeve 20. , and extends to the inside of the sealing sleeve 20. The gas generated when the air compressor 11 is started will enter the inside of the connecting pipe 14 through the air pipe 12, and then be transported to the inside of the ventilation frame 25 through the connecting pipe 14, and finally pass through it. The connected connecting tube 24 enters the inside of the sealing sleeve 20. As the gas continues to enter, the gas inside the sealing sleeve 20 and the movable sleeve 21 continues to increase, pushing the movable sleeve 21 to move outward, passing through the L-shaped plate 19 Drive the baffle 18 to move to both sides inside the collection box 16, and open the top surface of the collection box 16, so that the blown down fluff can smoothly enter the inside of the collection box 16 for unified collection;

A solenoid valve 15 is installed on the outer surface of the connecting pipe 14, a pressure relief valve 23 is installed on the bottom surface of the movable sleeve 21, a reset column 26 is provided between the L-shaped plate 19 and the collection box 16, and the reset column 26 includes a mounting sleeve 33. A return spring 35 and a movable column 34 are provided inside the installation sleeve 33. The movable column 34 is movably sleeved inside the installation sleeve 33. One end of the return spring 35 is fixedly connected to the bottom surface of the movable column 34, and the other end of the return spring 35 is fixedly connected to the bottom surface of the movable column 34. It is fixedly connected to the bottom surface of the movable column 34. One end of the movable column 34 is fixedly connected to one side surface of the L-shaped plate 19. One side surface of the installation sleeve 33 is fixedly connected to one side surface of the collection box 16. By opening the pressure relief valve 23, the gas inside the movable sleeve 21 and the sealing sleeve 20 can be discharged. At the same time, under the action of the reset column 26, the two baffles 18 are driven to move toward each other until they fit together, which can effectively prevent the collection box 16 The problem arises that the broken lint inside floats out from the inside of the collection box 16 when the complete wool web is cut.

The adsorption component is arranged inside the collection box 16. The adsorption component is used to adsorb the broken fluff collected inside the collection box 16. The adsorption component includes a fixed sleeve 27, and the number of the fixed sleeves 27 is multiple. The plurality of fixed sleeves 27 are evenly installed on the bottom surface of the collection box 16. Fans 28 are installed inside the fixed sleeves 27. Mounting plates 30 are fixedly installed on both ends of the top surface of the collection box 16. One side of the mounting plate 30 has a bumper fixedly installed on the surface. The touch switch 31 and the touch plate 32 are fixedly installed on the top surface of the baffle 18. The touch switch 31 is electrically connected to the fan 28. A partition net 29 is fixedly installed inside the collection box 16, and the partition net 29 is arranged on the fixed sleeve. 27, during the movement of the baffle 18, the touch plate 32 comes into contact with the touch switch 31 on one side of the installation plate 30, and then the multiple fans 28 inside the collection box 16 can be controlled to start through the touch switch 31. The fan 28 generates downward suction, which can easily suck the blown down lint into the inside of the collection box 16, and tightly adsorb the lint on the top surface of the partition screen 29 to prevent the lint inside the collection box 16. The problem of scattering in the wind arises.

Specifically, the working process or working principle of the doffer air blowing device of the carding machine is: during use, when the wool net on the outer surface of the elastic card clothing 4 is about to be completed, the air compressor 11 can be started by controlling the air compressor 11. The gas generated will enter the inside of the connecting pipe 14 through the gas pipe 12, and then be transported to the inside of the ventilation frame 25 through the connecting pipe 14, and finally enter the inside of the sealing sleeve 20 through the connecting pipe 24. As the gas continues to enter, the gas inside the sealing sleeve 20 and the movable sleeve 21 continues to increase, and finally the movable sleeve 21 is pushed to move outward. When the movable sleeve 21 moves outward, the baffle can be driven through the L-shaped plate 19 18 moves to both sides inside the collection box 16. During the movement, when the touch plate 32 comes into contact with the touch switch 31 on one side of the installation plate 30, the touch switch 31 can control the movement inside the collection box 16. Multiple fans 28 are started, and the fans 28 generate downward suction, which can easily suck the blown down lint into the inside of the collection box 16, and tightly adsorb the lint to the top surface of the partition 29, preventing the collection box from The problem of lint inside 16 scattering with the wind occurs. At this time, when the baffle 18 is fully opened, the solenoid valve 15 can be closed, so that the baffle 18 always remains open, and as the air compressor 11 rotates When it is continuously started, the gas generated will enter the inside of the connecting tube 10 through the air pipe 12, and finally enter the inside of the blowing tube 9 through the connecting tube 10, and then spray downward through the blowing hole 17, and the chopping knife will The broken fluff between the chopping knife 7 and the elastic card clothing 4 is blown down to the inside of the collection box 16 for unified collection, thereby realizing that the broken fluff generated between the chopping knife 7 and the elastic card clothing 4 can be separated from the chopping knife 7 and the elastic card clothing 4. The purpose of blowing off between the cloths 4 is to prevent the existing small amount of fluff from rolling over between the doffer 3 and the chopper 7 to form a hard felt, which will easily cause the hard felt to squeeze out between the doffer 3 and the chopper 7 and damage the doffer. Problem with elastic card clothing 4 on 3;

Moreover, after replacing the complete wool net, the air compressor 11 can be turned off. When the air compressor 11 is turned off, the gas inside the movable sleeve 21 and the sealing sleeve 20 can be discharged by opening the pressure relief valve 23. At the same time, under the action of the reset column 26, the two baffles 18 are driven to move toward each other until they fit together, which can effectively prevent the broken lint inside the collection box 16 from being removed from the inside of the collection box 16 when cutting the complete wool web. The problem of drifting out occurs, and during the process of the two baffles 18 moving toward each other, the touch plate 32 loses its pressure on the touch switch 31, and the fan 28 stops rotating accordingly.

It should be noted that the air compressor 11 is a device or equipment that exists in the prior art, or is a device or equipment that can be implemented in the prior art. Its power supply, specific composition and principle are clear to those skilled in the art, so No further details will be given.

Claims (10)

1. The carding machine doffer air blowing device includes a main frame (1), which is characterized in that a rotating shaft (2) is installed inside the main frame (1), and the outer surface of the rotating shaft (2) is fixedly sleeved with Doffer (3), the outer surface of the doffer (3) is covered with elastic card clothing (4), and a C-shaped frame (5) is fixedly installed on one side surface of the main frame (1). The C-shaped frame The top surface of (5) is provided with a knife holder (6), and the top surface of the knife holder (6) is equipped with a chopping knife (7); Air blowing assembly, the air blowing assembly includes a vertical plate (8) and an air blowing tube (9). The vertical plate (8) is fixedly installed on the top surface of the C-shaped frame (5), and the air blowing tube (9) is fixed Sleeved inside the vertical plate (8), the bottom surface of the blowing tube (9) is provided with a plurality of blowing holes (17) at equal intervals, and the blowing tube (9) is arranged above the chopping knife (7); Collection assembly, the collection assembly includes a collection box (16), the collection box (16) is fixedly installed on one side surface of the main frame (1), and is located below the C-shaped frame (5). Set to collect the fluff blown off by the blower (9); The adsorption component is arranged inside the collection box (16), and the adsorption component is arranged to adsorb the broken fluff collected inside the collection box (16). 2. The carding machine doffer air blowing device according to claim 1, characterized in that an air compressor (11) is fixedly installed on one side surface of the main frame (1), and the air compressor (11) The air outlet is fixedly connected to an air pipe (12). One end of the air pipe (12) is fixedly connected to one end of the connecting tube (10). The connecting tube (10) is plugged into the inside of the blowing tube (9). 3. The carding machine doffer air blowing device according to claim 2, characterized in that two baffles (18) are movably connected inside the collection box (16), and the two baffles (18) Set opposite each other, sealing sleeves (20) are fixedly installed on both sides of the collection box (16), and a movable sleeve (21) is movable inside the sealing sleeve (20). The movable sleeve A sealing plate (22) is fixedly installed on one side surface of the frame (21), and an L-shaped plate (19) is provided between the sealing plate (22) and the baffle (18). The L-shaped plate (19) One end is fixedly connected to the top surface of the sealing plate (22), and the other end of the L-shaped plate (19) is fixedly connected to one side surface of the baffle (18). 4. The carding machine doffer air blowing device according to claim 3, characterized in that a connecting pipe (14) is installed on the outer surface of the gas pipe (12), and the gas pipe (12) and the connecting pipe (14) ) is provided with a three-way valve (13). The gas transmission pipe (12) and the connecting pipe (14) are connected to each other through the three-way valve (13). One end of the connecting pipe (14) is fixedly connected to a ventilation frame. (25), both ends of the top surface of the ventilation frame (25) are fixedly connected with communication tubes (24), the communication tube (24) is fixedly connected to the bottom surface of the sealing sleeve (20), and extends to the sealing sleeve Inside the barrel (20). 5. The carding machine doffer air blowing device according to claim 4, characterized in that a solenoid valve (15) is installed on the outer surface of the connecting pipe (14), and a solenoid valve (15) is installed on the bottom surface of the movable frame (21). Pressure relief valve (23). 6. The carding machine doffer air blowing device according to claim 1, characterized in that the adsorption assembly includes a fixed sleeve (27), the number of the fixed sleeves (27) is multiple, and the plurality of fixed sleeves (27) are Fixed sleeves (27) are installed at equal distances on the bottom surface of the collection box (16), and fans (28) are installed inside the fixed sleeves (27). 7. The carding machine doffer air blowing device according to claim 3, characterized in that mounting plates (30) are fixedly installed on both ends of the top surface of the collection box (16), and the mounting plates (30) are A touch switch (31) is fixedly installed on one side surface, a touch plate (32) is fixedly installed on the top surface of the baffle (18), and the touch switch (31) is electrically connected to the fan (28) . 8. The carding machine doffer air blowing device according to claim 1, characterized in that a partition net (29) is fixedly installed inside the collection box (16), and the partition net (29) is arranged on a fixed sleeve. above (27). 9. The carding machine doffer air blowing device according to claim 1, characterized in that a mounting seat (36) is fixedly installed on the top surface of the C-shaped frame (5), and the interior of the mounting seat (36) rotates A threaded rod (38) is installed, and a clamping plate (37) is movable inside the mounting base (36). A threaded hole is provided inside the clamping plate (37). The clamping plate (37) ) is threadedly connected to the threaded rod (38) through the threaded hole, and a knob (39) is fixedly installed at one end of the threaded rod (38). 10. The carding machine doffer air blowing device according to claim 3, characterized in that a reset column (26) is provided between the L-shaped plate (19) and the collection box (16), and the reset column (26) ) includes an installation sleeve (33). A return spring (35) and a movable column (34) are provided inside the installation sleeve (33). The movable column (34) is movably connected to the installation sleeve (33). Inside, one end of the return spring (35) is fixedly connected to the bottom surface of the movable column (34), and the other end of the return spring (35) is fixedly connected to the bottom surface of the movable column (34). The movable column (34) ) is fixedly connected to one side surface of the L-shaped plate (19), and one side surface of the installation sleeve (33) is fixedly connected to one side surface of the collection box (16).