A negative-pressure pre-cotton-picking device and its application

Abstract

The present application relates to a negative-pressure pre-cotton picking device and its application, which includes a housing. Suction cotton ports are arranged on both sides inside the housing. The suction cotton ports are communicated with negative-pressure air ducts arranged on both sides inside the housing. A channel penetrating from front to back is left between the negative-pressure air ducts on both sides. The upper parts of the negative-pressure air ducts on both sides are conducted to a negative-pressure air pipe arranged on the upper part of the housing. The whole of the present application is installed on the front side of the cotton picking spindle inlet. It pre-picks the cotton on the outer side of the cotton plant into the cotton collecting box through negative pressure. The cotton on the inner side and the outer side of the cotton plant that is not scraped off is picked by the subsequent cotton picking spindles. Thus, by this way of picking in batches, a part of the cotton is pre-picked to reduce the working load of the cotton picking spindles and extend the service life of the spindle needles. By means of the present application, the probability of the power source stopping can also be reduced, the cotton picking rate can be improved, and the picking efficiency can be improved. The structure of the present application is simple, the production cost is low, and the overall cost of the cotton picker is reduced.

Description

Technical Field

[0001] The present application relates to the field of lifting cotton picking machinery, and in particular to a negative pressure pre-cotton picking device and its application. Background Art

[0002] With the improvement of cotton varieties and planting techniques, the per-acre yield of cotton is getting higher and higher, and correspondingly, the yield and volume of single cotton plants have also increased significantly. Large-scale cotton picking and baling machines have gradually become popular. They use the spindle needles on several cotton picking spindles arranged side by side on the front side to pull the cotton off the cotton stalks, and then use negative pressure to suck the cotton into the collection box, and then send it to the baling mechanism on the rear side for baling. The driving mechanisms of several cotton picking spindles are linked in series. With the increase in cotton yield and volume, a large amount of cotton, cotton leaves, and cotton stalks that are not shed will enter the cotton picking spindle entrance during the cotton picking process. They will give great resistance to the cotton picking spindles, which will cause a great load on the driving mechanism. If the driving power source is not powerful enough, the driving source will be shut down.

[0003] The solution in the prior art is to increase the driving force of the power source and give the driving mechanism enough driving force to drive the rotation of the cotton picking spindles, so as to adapt to the increasing production of cotton. However, this method will not only cause the cost of the cotton picker to continue to rise, which will increase costs for both manufacturers and users, but will also cause increased wear of the spindle needles and reduce their service life.

[0004] Moreover, with the increase in cotton production, in order to ensure the clean picking rate, the cotton picker cannot move too fast. If the moving speed is too fast, a large amount of cotton will enter the cotton picking spindle area, and the spindle needles will not be able to contact the cotton in a short time, which will result in more cotton remaining on the cotton stalks. Therefore, in order to ensure the clean picking rate, it can only move at a lower speed, and the picking efficiency is low. In the prior art, in order to solve this technical problem, it is usually adopted to set another cotton picking spindle after a cotton picking spindle, and ensure the clean picking rate by picking twice before and after. Since the cost of cotton picking spindles is relatively high, this method increases the cost of manufacturing cotton pickers. Summary of the invention

[0005] In view of the defects of the above-mentioned prior art, the purpose of the present application is to propose a negative pressure pre-cotton picking device that can first perform negative pressure picking on the cotton on the cotton plants, reduce the load of subsequent cotton picking spindles, extend the service life of spindle needles, and reduce the production cost of large-scale cotton pickers; on the basis of this purpose, another purpose of the present application is to propose the application of a negative pressure pre-cotton picking device that uses negative pressure as the front picking and picking spindles as the back picking.

[0006] The object of the present application is achieved as follows: A negative-pressure pre-cotton picking device includes a housing, with cotton suction ports provided on both sides inside the housing. The cotton suction ports are communicated with negative-pressure air ducts provided on both sides inside the housing. A channel penetrating through from front to back is left between the negative-pressure air ducts on both sides, and the upper parts of the negative-pressure air ducts on both sides are conducted with a negative-pressure air pipe provided on the upper part of the housing.

[0007] Positive-pressure air ducts are provided outside the negative-pressure air ducts on both sides. A positive-pressure air pipe is provided on the outer wall of the positive-pressure air duct. The positive-pressure air duct includes an air outlet, and the air outlet is located on the front side of the negative-pressure air duct. The cotton suction port is located between the air outlet and the negative-pressure air duct.

[0008] The positive-pressure air duct includes an air inlet duct arranged front and back and a air supply duct arranged left and right. The air outlet end of the air inlet duct is communicated with the air inlet end of the air supply duct. The aforementioned positive-pressure air pipe is installed on the side wall of the air inlet duct and is communicated with the air inlet duct. The aforementioned air outlet is opened at the air outlet end of the air supply duct.

[0009] A partition is provided inside the negative-pressure air duct. The partition divides the negative-pressure air duct into a first-side negative-pressure air duct and a second-side negative-pressure air duct. The partition is an L-shaped plate, and the partition makes both the first-side negative-pressure air duct and the second-side negative-pressure air duct have a horizontal suction section and a vertical delivery section.

[0010] The housing includes outer panels on both outer sides, inner panels on both inner sides, a rear panel that is hermetically connected to the rear ends of the outer panels and the inner panels, a bottom plate that is hermetically connected to the bottom ends of the outer panels and the inner panels, a front panel that is connected to the front ends of the outer panel and the bottom plate. There is a gap between the front panel and the inner panel, and this gap is the aforementioned cotton suction port.

[0011] A negative-pressure air chamber is provided at the connection between the negative-pressure air pipe and the negative-pressure air duct. A partitioning device is provided inside the negative-pressure air chamber. The partitioning device divides the negative-pressure air chamber into three air paths. Two of the air paths are communicated with the negative-pressure air ducts on both sides, and the other air path is communicated with the front port of the aforementioned channel penetrating through from front to back to form a top negative-pressure air duct.

[0012] The partitioning device includes a partition block provided in the middle of the negative-pressure air chamber. The rear end face of the partition block is fixedly and hermetically connected to the rear end face of the negative-pressure air chamber. A partition plate is fixedly connected to the front end face of the partition block. Both ends of the partition plate are fixedly and hermetically connected to the two side walls of the negative-pressure air chamber respectively, thereby forming three air paths located on the left, right, and front.

[0013] Mounting plates extending downward are provided on the lower end faces of the bottom plates of the two negative-pressure air ducts. Guide plates are installed on the opposite faces of the two mounting plates.

[0014] Cotton stripping plates are longitudinally provided on the opposite faces of the two inner panels. A number of teeth are longitudinally provided on the cotton stripping plates.

[0015] The application of a negative-pressure pre-cotton picking device includes the following steps:

[0016] Step 1: Install a negative-pressure pre-cotton-picking device described in this application in front of the cotton inlet of the cotton-picking spindle area of the cotton picker, so that the rear port of the channel between the two negative-pressure air ducts is communicated with the cotton inlet of the cotton-picking spindle area; Connect the air outlet of the induced draft fan to the middle of an air duct, connect the lower end of the air duct to the upper port of the negative-pressure air duct to give negative pressure in the negative-pressure air duct, connect the positive-pressure air duct to the middle and upper part of the air duct to give positive pressure in the positive-pressure air duct, and connect the upper end of the air duct to the cotton collecting box of the cotton picker;

[0017] Step 2: When the cotton picker is moving, start the induced draft fan and start the driving device of the cotton-picking spindles to perform negative-pressure pre-picking and post-picking of the cotton-picking spindles;

[0018] Step: The cotton first enters the channel between the negative-pressure air ducts. Part of the cotton is directly sucked into the negative-pressure air duct and the top negative-pressure air duct through the cotton suction port. Part of the cotton is scraped by the doffing plate and separated from the cotton stalks, and then sucked into the negative-pressure air duct and the top negative-pressure air duct, and sent to the cotton collecting box through the negative-pressure air duct and the air duct;

[0019] Step 2-2: After the cotton that has not fallen off yet leaves the channel, it enters the cotton-picking spindle area through the cotton inlet, and most of the cotton is picked into the cotton collecting box by the cotton-picking spindles.

[0020] Due to the implementation of the above technical solution, this application is integrally installed in front of the cotton-picking spindle inlet. Through the positive pressure blown into the first negative-pressure air duct and the second negative-pressure air duct by the first negative-pressure air duct, the second negative-pressure air duct, the top negative-pressure air duct and the positive-pressure air duct provided in the housing, the cotton scraped off by the scraper is sucked into the cotton collecting box from the negative-pressure air duct. It mainly pre-picks the cotton outside the cotton plant into the cotton collecting box through negative pressure. The cotton inside and outside the cotton plant that has not been scraped off is picked by the subsequent cotton-picking spindles. Thus, by this way of picking in batches, part of the cotton is pre-picked to reduce the working load of the cotton-picking spindles and extend the service life of the spindle needles. Through this application, the working pressure of each component can also be balanced, and the probability of the power source stopping is reduced. The reduction of the number of stops can directly improve the picking efficiency. Through this application, the picking rate of cotton can also be improved. As a result, the traveling speed of the cotton picker can be increased to a certain extent, thereby further improving the picking efficiency. The structure of this application is simple. Compared with replacing the driving device with a larger horsepower to adapt to the situation of increased cotton output and larger volume, and the method of installing another picking spindle behind the picking spindle to improve the cotton picking rate, the production cost is greatly reduced. The overall cost of the cotton picker is reduced, and the payback period of the user can be shortened. The application of this application uses negative pressure as the pre-picking device and the cotton-picking spindle as the post-picking device, which can greatly improve the cotton picking efficiency and picking rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific structure of this application is given by the following drawings and embodiments:

[0022] Figure 1It is a schematic cross-sectional structure diagram of the present application;

[0023] Figure 2 It is a schematic structural diagram of the first-side negative-pressure air duct, the second-side negative-pressure air duct, and the positive-pressure air duct of the present application at the housing;

[0024] Figure 3 It is a schematic structural diagram of the first-side negative-pressure air duct, the second-side negative-pressure air duct, and the positive-pressure air duct of the present application;

[0025] Figure 4 It is a schematic structural diagram of the top negative-pressure air duct, the first-side negative-pressure air duct, and the second-side negative-pressure air duct in the top view setting position of the present application.

[0026] Legend: 1. Negative-pressure air duct; 2. Negative-pressure air chamber; 3. Separation device; 3-1. Separation block, 3-2. Separation plate, 4. Positive-pressure air duct; 5. First-side negative-pressure air duct; 5-1. Partition board, 6. Positive-pressure air duct; 6-1. Air inlet duct, 6-2. Air outlet, 6-3. Air supply duct, 7. Housing; 8. Second-side negative-pressure air duct; 9. Cotton removal board, 10. Guide plate, 11. Front panel, 12. Outer panel, 13. Rear panel, 14. Inner panel, 15. Guide plate, 16. Cotton suction port, 17. Mounting plate, 18. Bottom plate, 19. Top negative-pressure air duct. Embodiment

[0027] The present application is not limited by the following embodiments, and specific implementation manners can be determined according to the technical solution of the present application and actual situations.

[0028] In the present application, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the Figure 1 layout drawing in the specification appendix, such as: the positional relationships of up, down, left, right, etc. are determined according to the layout direction of the Figure 1 layout drawing in the specification appendix.

[0029] The following further describes the present application in conjunction with the embodiments and the drawings. Embodiment: As shown in the Figures 1 - 4 drawing, a negative-pressure pre-cotton harvesting device includes a housing 7. Suction cotton ports 16 are arranged on both sides inside the housing 7. The suction cotton ports 16 are communicated with the negative-pressure air ducts arranged on both sides inside the housing 7. A channel penetrating front and back is left between the negative-pressure air ducts on both sides. The upper parts of the negative-pressure air ducts on both sides are conducted with the negative-pressure air duct 1 arranged on the upper part of the housing 7. The present application bundles cotton plants in the housing 7 through the channel, and then sends the cotton to the cotton collection box through the negative pressure in the negative-pressure air duct, the negative-pressure air duct, and the negative-pressure air duct 1.

[0030] Further, as Figures 1 - 3As shown in the figure, positive pressure air ducts 6 are provided outside the negative pressure air ducts on both sides. A positive pressure air pipe 6 is provided on the outer wall of the positive pressure air duct 6. The positive pressure air duct 6 includes an air outlet 6-2, and the air outlet 6-2 is located in front of the negative pressure air duct. The cotton suction port 16 is located between the air outlet 6-2 and the negative pressure air duct.

[0031] Furthermore, the positive pressure air duct 6 includes an air inlet duct 6-1 arranged front and back and an air supply duct 6-3 arranged left and right. The air outlet end of the air inlet duct 6-1 is communicated with the air inlet end of the air supply duct 6-3. The aforementioned positive pressure air pipe 6 is installed on the side wall of the air inlet duct 6-1 and is communicated with the air inlet duct 6-1. The aforementioned air outlet 6-2 is opened at the air outlet end of the air supply duct 6-3, and the air outlet 6-2 is a long strip-shaped opening opened from top to bottom. The setting of the positive pressure air duct 6 enables the cotton entering the cotton suction port 16 to be simultaneously affected by positive and negative pressures, which is beneficial to improving the efficiency of negative pressure cotton picking.

[0032] Furthermore, as Figures 1 - 4 shown in the figure, a partition plate 5-1 is provided in the negative pressure air duct. The partition plate 5-1 divides the negative pressure air duct into a first side negative pressure air duct 5 and a second side negative pressure air duct 8. The partition plate 5-1 is an L-shaped plate, and the partition plate 5-1 enables both the first side negative pressure air duct 5 and the second side negative pressure air duct 8 to have a horizontal suction section and a vertical delivery section. The suction section of the first side negative pressure air duct 5 is located above the suction section of the second side negative pressure air duct 8, and the delivery section of the first side negative pressure air duct 5 is located in front of the delivery section of the second side negative pressure air duct 8. Similarly, at least one partition plate 5-1 can also be provided in the negative pressure air duct to divide the negative pressure air duct into at least two side negative pressure air ducts, which is beneficial to the concentration of the wind force in the negative pressure air duct and can be carried out according to the upper and lower regions when sucking a large amount of cotton, improving the efficiency and effect of negative pressure picking.

[0033] As Figure 2 、 3 shown in the figure, the housing 7 includes outer panels 12 located on both outer sides, inner panels 14 located on both inner sides, a rear panel 13 that hermetically connects the rear ends of the outer panels 12 and the inner panels 14, a bottom plate 18 that hermetically connects the bottom ends of the outer panels 12 and the inner panels 14, and a front panel 11 that is connected to the front ends of the outer panel 12 and the bottom plate 18. There is a gap between the front panel 11 and the inner panel 14, and this gap is the aforementioned cotton suction port 16.

[0034] Furthermore, the inner panel 14, the outer panel 12, the rear panel 13, and the bottom plate enclose the aforementioned negative pressure air duct.

[0035] Further, the aforementioned air inlet duct 6-1 is arranged on the outer side surface of the outer panel 12, the aforementioned air supply duct 6-3 is arranged on the front side surface of the front panel 11, and the air outlet 6-2 is opened on the front panel 11. The cotton suction port 16 is arranged between the air outlet 6-2 and the negative pressure duct, so that the cotton entering the cotton suction port 16 is simultaneously affected by positive and negative pressures, which is beneficial to improving the efficiency of negative pressure cotton harvesting.

[0036] As Figure 1 , 4 shown, a negative pressure air chamber 2 is provided at the connection between the negative pressure air duct 1 and the negative pressure duct. A partition device 3 is arranged in the negative pressure air chamber 2. The partition device 3 divides the negative pressure air chamber 2 into three air paths. Two of the air paths are communicated with the negative pressure ducts on both sides, and the other air path is communicated with the front port of the aforementioned channel penetrating through the front and back to form a top negative pressure duct 19.

[0037] Further, the partition device 3 includes a partition block 3-1 arranged in the middle of the negative pressure air chamber 2. The rear end face of the partition block 3-1 is fixedly and sealingly connected to the rear end face of the negative pressure air chamber 2. A partition plate 3-2 is fixedly connected to the front end face of the partition block 3-1. The two ends of the partition plate 3-2 are respectively fixedly and sealingly connected to the two side walls of the negative pressure air chamber 2, thus forming three air paths located on the left, right, and front. The arrangement of the negative pressure air chamber 2 and the partition device 3 can make the negative pressure wind force be evenly divided into three parts. While increasing the area of the top negative pressure duct 19 for negative pressure cotton harvesting, it ensures that the negative pressure wind force can be more evenly communicated with the negative pressure duct and the top negative pressure duct 19.

[0038] As Figure 1 , 2 shown, mounting plates 17 extending downward are provided on the lower end faces of the bottom plates 18 of the two negative pressure ducts. Guide plates 10 are mounted on the opposite faces of the two mounting plates 17. The guide plates 10 include a vertical connecting portion and a horizontal guiding portion. The front end of the guiding portion is an inclined hypotenuse that slopes inward and backward. The opposite side edges of the two guide plates 10 are parallel, and a guiding channel is left between them. The guide plates 10 can further converge the cotton plants entering the channel inward, facilitating subsequent entry into the picking spindle area.

[0039] Further, a cotton stripping plate 9 is longitudinally arranged on the opposite faces of the two inner panels 14. A plurality of teeth are longitudinally arranged on the cotton stripping plate 9. The cotton stripping plate 9 is preferably arranged at the foremost end of the opposite faces of the two inner panels 14. In this way, the cotton stripped by the cotton stripping plate 9 will be sucked into the cotton suction port 16 by negative pressure during the falling process. The arrangement of the cotton stripping plate 9 can scrape the cotton off the cotton stalk, facilitating negative pressure cotton harvesting.

[0040] The application of a negative pressure type pre-cotton harvesting device includes the following steps:

[0041] Step 1: Install a negative-pressure pre-cotton picking device described in this application in front of the cotton inlet of the cotton picking spindle area of the cotton picker, so that the rear port of the channel between the two negative-pressure air ducts is communicated with the cotton inlet of the cotton picking spindle area; Connect the air outlet of the induced draft fan to the middle of an air duct, connect the lower end of the air duct to the upper port of the negative-pressure air duct 1 to give negative pressure in the negative-pressure air duct, connect the positive-pressure air duct 4 to the middle and upper part of the air duct to give positive pressure in the positive-pressure air duct 6, and connect the upper end of the air duct to the cotton collection box of the cotton picker;

[0042] Step 2: When the cotton picker is moving, start the induced draft fan and start the driving device of the cotton picking spindle to perform negative-pressure pre-picking and post-picking of the cotton picking spindle;

[0043] Step 2-1: The cotton first enters the channel between the negative-pressure air ducts. Part of the cotton is directly sucked into the negative-pressure air duct and the top negative-pressure air duct 19 through the cotton suction port 16. Part of the cotton is scraped by the cotton stripping plate 9 and separated from the cotton stalks, and then sucked into the negative-pressure air duct and the top negative-pressure air duct 19, and sent to the cotton collection box through the negative-pressure air duct 1 and the air duct;

[0044] Step 2-2: After the cotton that has not fallen off yet leaves the channel, it enters the cotton picking spindle area through the cotton inlet, and most of the cotton is picked into the cotton collection box by the cotton picking spindle.

[0045] When this application is in use, it is fixedly installed in front of the cotton picking spindle of the cotton picker, so that the rear port of the channel between the two negative-pressure air ducts is communicated with the cotton inlet of the cotton picking spindle area; Connect the air outlet of the induced draft fan to the middle of an air duct, connect the lower end of the air duct to the upper port of the negative-pressure air duct 1 to give negative pressure in the negative-pressure air duct, connect the positive-pressure air duct 4 to the middle and upper part of the air duct to give positive pressure in the positive-pressure air duct 6, and connect the upper end of the air duct to the cotton collection box of the cotton picker; When the cotton picker is moving, start the induced draft fan and start the driving device of the cotton picking spindle to perform negative-pressure pre-picking and post-picking of the cotton picking spindle; During the cotton picking process, the cotton plants entering the channel will be guided and bundled by the guide plate 10. Part of the cotton is directly sucked into the negative-pressure air duct and the top negative-pressure air duct 19 through the cotton suction port 16. Part of the cotton is scraped by the cotton stripping plate 9 and separated from the cotton stalks, and then sucked into the negative-pressure air duct and the top negative-pressure air duct 19, and sent to the cotton collection box through the negative-pressure air duct 1 and the air duct; At this time, since the air outlet 6-2 of the positive-pressure air duct 6 is adjacent to the cotton suction port 16, as long as the cotton entering the cotton suction port 16 will be subject to two forces of negative-pressure suction and positive-pressure blowing, thereby improving the efficiency of negative-pressure cotton picking; After the cotton that has not fallen off yet leaves the channel, it enters the cotton picking spindle area through the cotton inlet, and most of the cotton is picked into the cotton collection box by the cotton picking spindle.

[0046] The above description is only an example for clearly explaining this application, and is not a limitation on the implementation mode of this application. Any obvious changes or variations derived from the technical solutions of this application are still within the protection scope of this application.

Claims

1. A negative pressure type pre-cotton harvesting device, characterized in that: It includes a housing. Suction cotton ports are arranged on both sides inside the housing. The suction cotton ports are communicated with the negative pressure air ducts arranged on both sides inside the housing. A channel penetrating through the front and back is left between the negative pressure air ducts on both sides. The upper parts of the negative pressure air ducts on both sides are conducted with the negative pressure air pipe arranged on the upper part of the housing. Positive pressure air ducts are arranged outside the negative pressure air ducts on both sides. A positive pressure air pipe is arranged on the outer wall of the positive pressure air duct. The positive pressure air duct includes an air outlet, and the air outlet is located on the front side of the negative pressure air duct. The suction cotton port is located between the air outlet and the negative pressure air duct. The positive pressure air duct includes an air inlet duct arranged front and back and an air supply duct arranged left and right. The air outlet end of the air inlet duct is communicated with the air inlet end of the air supply duct. The aforementioned positive pressure air pipe is installed on the side wall of the air inlet duct and is communicated with the air inlet duct. The aforementioned air outlet is opened at the air outlet end of the air supply duct. A partition board is arranged in the negative pressure air duct. The partition board divides the negative pressure air duct into a first side negative pressure air duct and a second side negative pressure air duct. The partition board is an L-shaped board, and the partition board makes both the first side negative pressure air duct and the second side negative pressure air duct have a horizontal suction section and a vertical delivery section. A negative pressure air chamber is arranged at the connection between the negative pressure air pipe and the negative pressure air duct. A separation device is arranged in the negative pressure air chamber. The separation device divides the negative pressure air chamber into three air paths. Two of the air paths are communicated with the negative pressure air ducts on both sides, and the other air path is communicated with the front port of the aforementioned channel penetrating through the front and back to form a top negative pressure air duct.

2. The negative pressure type pre-cotton picking device according to claim 1, characterized in that: The housing includes outer panels located on both outer sides, inner panels located on both inner sides, a rear panel that hermetically connects the rear ends of the outer panels and the inner panels, a bottom plate that hermetically connects the bottom ends of the outer panels and the inner panels, a front panel that is connected to the front ends of the outer panel and the bottom plate. There is a gap between the front panel and the inner panel, and this gap is the aforementioned suction cotton port.

3. The negative pressure type pre-cotton picking device according to claim 1, characterized in that: The separation device includes a separation block arranged in the middle of the negative pressure air chamber. The rear end face of the separation block is fixedly and hermetically connected to the rear end face of the negative pressure air chamber. A separation plate is fixedly connected to the front end face of the separation block. Both ends of the separation plate are fixedly and hermetically connected to the side walls on both sides of the negative pressure air chamber respectively, thus forming three air paths located on the left, right, and front.

4. A negative pressure type pre-cotton picking device according to claim 1 or 2 or 3, characterized in that: Mounting plates extending downward are arranged on the lower end faces of the bottom plates of the two negative pressure air ducts. Guide plates are installed on the opposite faces of the two mounting plates.

5. The negative pressure type pre-cotton picking device according to claim 2, characterized in that: Demoulding plates are longitudinally arranged on the opposite faces of the two inner panels. A number of teeth are longitudinally arranged on the demoulding plates.

6. The application of a negative pressure pre-cotton picking device includes the following steps: Step 1: Install a negative pressure pre-cotton picking device as described in claim 5 in front of the cotton inlet of the cotton picking area of the cotton picker, so that the rear port of the channel between the negative pressure air ducts on both sides is conducted with the cotton inlet of the cotton picking area. Connect the air outlet of the induced draft fan to the middle part of an induced draft pipe. The lower end of the induced draft pipe is connected to the upper port of the negative pressure air pipe to give negative pressure inside the negative pressure air duct. The positive pressure air pipe is connected to the middle and upper part of the induced draft pipe to give positive pressure inside the positive pressure air duct. The upper end of the induced draft pipe is connected to the cotton collecting box of the cotton picker. Step 2: When the cotton picker is moving, start the induced draft fan and start the driving device of the cotton picking spindles to perform negative pressure pre-cotton picking and post-cotton picking of the cotton picking spindles. Step 2-1: The cotton first enters the channel between the negative pressure air ducts. A part of the cotton is directly sucked into the negative pressure air duct and the top negative pressure air duct through the cotton suction port. A part of the cotton is scraped by the cotton stripping plate, separated from the cotton stalks, and then sucked into the negative pressure air duct and the top negative pressure air duct, and is sent to the cotton collecting box through the negative pressure air pipe and the air guiding pipe; Step 2-2: After the cotton that still has not fallen off leaves the channel, it enters the cotton picking spindle area through the cotton inlet, and most of the cotton is picked into the cotton collecting box by the cotton picking spindles.

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