A boll cleaner for a cotton harvester

Abstract

The application belongs to the field of cotton picking and specifically discloses a foreign matter removing device for a cotton picker, which comprises a foreign matter filtering device, a first foreign matter removing device, a second foreign matter removing device and a third foreign matter removing device which are installed in a cotton collecting box, the foreign matter filtering device is installed at a cotton inlet of the cotton collecting box, the first foreign matter removing device is installed at the top of the cotton collecting box, the second foreign matter removing device is arranged in the cotton collecting box, multiple second foreign matter removing devices are arranged, the multiple second foreign matter removing devices are arranged obliquely in the cotton collecting box, a cotton discharging roller is installed above the second foreign matter removing device and can rotate around a fixed shaft to forcibly discharge cotton, and the third foreign matter removing device is installed at a cotton outlet of the cotton collecting box.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cotton picking, and particularly relates to a foreign matter removing device for a cotton picker. BACKGROUND

[0002] After the seed cotton is mechanically picked and compressed and packaged, it enters a cotton processing plant. Due to the high impurity rate, a special seed cotton cleaning machine is used to continue to clean the impurities. However, due to the compression for packaging, the adhesion between the impurities such as cotton leaves, cotton stalks, and boll shells and the cotton fibers is increased, making the subsequent cleaning difficult. Not only is the impurity removal efficiency low, time-consuming and labor-intensive, but also the cost is extremely high. Therefore, from the time the seed cotton is picked to the time it is packaged, the seed cotton should be decontaminated to reduce the impurity rate.

[0003] In patent CN110340016A, an impurity separation device for producing cotton thread is disclosed, which comprises a shell, a foreign matter separation cavity is formed in the shell, a blowing mechanism is arranged on the upper end face of the shell, a first screening plate and a second screening plate are arranged in the shell, one end of the first screening plate is fixedly connected to one side wall of the foreign matter separation cavity, the other end of the first screening plate is fixedly connected to the other side wall of the foreign matter separation cavity, a first vibration motor is fixedly installed on the bottom side wall of the first screening plate, and one end of the second screening plate is fixedly connected to one side wall of the foreign matter separation cavity. However, the structure has the following problems:

[0004] (1) In this structure, in addition to the vibration of the support seat being weakened by the buffer spring, the entire main body of the impurity separation device will vibrate under the action of the vibration motor, which will consume more energy and the vibration effect is limited.

[0005] (2) The working principle and process of the impurity separation device assumes that the cotton entering the device is independent of each other, so it can pass through the pores of the screening plate. However, for actual cotton, there is an adhesion between them, causing the cotton to become a collective mass. In actual work, the cotton may not be able to pass through the pores of the screening plate, but will be congested on the upper surface of the screening plate, failing to achieve the effect of removing foreign matter.

[0006] (3) In the foreign matter separation cavity of the impurity separation device, the separation of large mud blocks, stone blocks and other impurities from cotton can be achieved. However, when the size of the impurities and the cotton is similar, the impurities will pass through the lower part of the first screening plate along with the cotton to the upper part of the second screening plate. The aperture of the second screening plate is smaller than that of the first screening plate, so the cotton cannot pass through, and at the same time, the impurities with a size similar to that of the cotton cannot pass through either. Ultimately, the cotton discharged from the second discharge port will still contain impurities, and the effect of removing foreign matter is poor.

[0007] (4) The impurity separation device can remove the impurities on the surface of the cotton through the air blower, and remove part of the impurities mixed with the cotton through the screening plate, but still cannot remove the impurities inside the cotton.

[0008] (5) The impurity separation device has a fixed structure and cannot be adjusted. SUMMARY

[0009] The purpose of the present application is to provide a kind of for cotton picker's impurity removal device, to solve the problem of high impurity content of seed cotton in the process of circular mould packing after harvesting, the present application is cleverly combined by first impurity removal device, second impurity removal device and third impurity removal device, fundamentally reduces the impurity content of seed cotton, saves a lot of time and manpower of subsequent seed cotton cleaning, reduces cost, is conducive to the processing and application of later seed cotton.

[0010] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0011] A kind of for cotton picker's impurity removal device, it is characterized in that, including installation in the filter impurity device of cotton collecting box, first impurity removal device, second impurity removal device and third impurity removal device, the filter impurity device is installed in the cotton inlet of cotton collecting box;First impurity removal device is installed at the top of cotton collecting box, second impurity removal device is arranged in the cotton collecting box, and multiple second impurity removal devices are arranged in the cotton collecting box, and the multiple second impurity removal devices are arranged in the cotton collecting box;Cotton discharge roller is installed above second impurity removal device, and can be fixed shaft rotation forced discharge;Third impurity removal device is installed in the cotton outlet of cotton collecting box.

[0012] As a further technical scheme, the second impurity removal device is composed of a screen, a screen frame, a vibrator, a base, a shock absorbing spring, a rotating shaft and a pressure sensor;The screen is fixedly installed on the upper surface of the screen frame, and the vibrator is fixedly installed on the lower surface of the screen frame;The screen frame and the base are connected by the shock absorbing spring;One side of the base is fixedly installed with the rotating shaft, and the rotating shaft is fixedly installed on the wall of the cotton picker by the bearing, so as to drive the second impurity removal device to rotate fixedly;The pressure sensor is fixedly installed in the second impurity removal device, and is used to detect the pressure of the screen and the seed cotton.

[0013] As a further technical scheme, the rotating shafts of the multiple second impurity removal devices are driven by the same motor, and the motor drives the rotating shafts of the multiple second impurity removal devices through a gear transmission device.

[0014] As a further technical scheme, the bottom surface of the base is inclined, so that the impurities can be collected in one place.

[0015] As a further technical scheme, the impurities collected by the filter impurity device and the second impurity removal device are connected by a hose and directly discharged outside the machine.

[0016] As a further technical solution, the damping spring is provided with a plurality of.

[0017] As a further technical solution, the lower surface of the screen frame and the bottom surface of the base are internally provided with cylindrical small bosses to provide positions for fixed installation of the damping springs.

[0018] As a further technical solution, the first impurity removal device is composed of an impurity removal fan and an arc-shaped filter plate, the impurity removal fan is arranged and installed on the top of the cotton collecting box along the width direction of the cotton picker, and each impurity removal fan corresponds to one cotton conveying channel.

[0019] As a further technical solution, the upper surface of the impurity removal device is uniformly provided with small holes, and the inner bottom surface of the impurity removal device is inclined.

[0020] As a further technical solution, the third impurity removal device is composed of an impurity removal fan, an impurity discharge groove and an impurity discharge pipeline; the impurity removal fan is located below the cotton conveying belt, the bottom of the impurity discharge groove is inclined, and the lowest point is connected to the impurity discharge pipeline.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The first impurity removal device arranged above the cotton collecting box uses a fan to form a suction force to collect impurities and blocks the seed cotton outside through the arc-shaped filter plate, which can effectively remove the impurities on the surface of the seed cotton and discharge the impurities outside the machine to preliminarily reduce the impurity content of the seed cotton; the impurities inside the seed cotton are turned to the surface by the extrusion and rubbing action of the spike roller, the second impurity removal device is installed inside the cotton collecting box, and the impurities of the seed cotton are further cleaned under the action of vibration, and the second impurity removal device is inclined arranged inside the cotton collecting box, so that the flow of the seed cotton in the cotton collecting box is S-shaped to increase the impurity removal path and the impurities are cleaned more thoroughly. The seed cotton is forced to discharge by the discharge roller, and the pressure sensor is used to detect whether the seed cotton in the cotton collecting box is congested, if the congestion occurs, the inclination angle of the second impurity removal device can be automatically adjusted to speed up the flow of the seed cotton, and the control of the stepping motor is realized by the controller of the cotton picker itself, without the need for an additional controller. After the first and second impurity removal devices, a small amount of impurities are cleaned by the third impurity removal device, so that the impurities are more thoroughly removed, the impurity content of the seed cotton is further reduced, the utilization rate of the seed cotton is improved, a large amount of time and manpower for cleaning the seed cotton is saved, the cost is reduced, and it is conducive to the processing and application of the seed cotton in the later period.

[0023] 2. The secondary impurity removal device of the present application, the vibration source is installed at the bottom of the screen frame, and the connection between the screen frame and the base only relies on a plurality of damping springs, so that when the vibration source works, the vibration is only transmitted to the screen frame 14 and the screen, and does not cause large vibration to the base, which is beneficial to save energy and achieve better vibration effect. In the present application, the impurities pass through the screen surface, not the cotton, and the cotton vibrates on the screen surface and continuously moves down due to the inclination of the screen surface, thereby realizing continuous conveying of the cotton, and the impurities are collected by the secondary impurity removal device while vibrating, not sharing a channel with the cotton, so that the impurity removal is more thorough.

[0024] 3. The secondary impurity removal device of the present application is additionally provided with a spike roller, which can extrude and rub the seed cotton ball, so that the impurities in the cotton can reach the surface and be further removed.

[0025] 4. The inclination angle of the secondary impurity removal device in the present application is adjustable, the pressure sensor checks the pressure of the seed cotton and the screen surface, so as to judge whether congestion is caused, if congestion is caused, the inclination angle of the screen surface is increased by driving rotation through the stepping motor, which is beneficial to the rapid discharge of the cotton.

[0026] 5. The flow direction of the seed cotton is changed to S type in the present application, the movement path of the seed cotton is increased, so that the seed cotton can pass through more secondary impurity removal devices, and the impurity removal is more thorough. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute an improper limitation of the present application.

[0028] Figure 1 It is a front view of the impurity removal device for the cotton picker of the present application.

[0029] Figure 2 It is a structure schematic view of the secondary impurity removal device of the impurity removal device for the cotton picker of the present application.

[0030] Figure 3 It is a power transmission schematic view of the secondary impurity removal device of the impurity removal device for the cotton picker of the present application.

[0031] Figure 4 It is a connection between the impurity discharge hose and the secondary impurity removal device and the impurity flow direction schematic view of the impurity removal device for the cotton picker of the present application.

[0032] Figure 5 It is a structure schematic view of the tertiary impurity removal device of the impurity removal device for the cotton picker of the present application.

[0033] Figure 6 It is an inclination angle control flow chart of the secondary impurity removal device of the impurity removal device for the cotton picker of the present application.

[0034] Figures 1 to 6 In: 1 is a secondary impurity removal device, 2 is a filter device, 3 is a cotton collecting box, 4 is a spike roller, 5 is a primary impurity removal device, 52 is an arc-shaped filter plate, 51 is an impurity removal fan, 6 is a cotton discharge roller, 7 is a tertiary impurity removal device, 71 is an impurity removal fan, 72 is an impurity discharge tank, 73 is an impurity discharge pipeline, 8 is a cotton conveying belt assembly, 9 is an opening roller, 10 is an impurity discharge hose; 11 is a base body, 12 is a rotating shaft, 13 is a damping spring, 14 is a screen frame, 15 is a vibrator, 16 is a pressure sensor, and 17 is a screen mesh. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed description is illustrative only and is intended to provide further description of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0036] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in this specification, the presence of a feature, step, operation, device, component and / or combination thereof is indicated;

[0037] For the convenience of description, if the terms "upper", "lower", "left", "right" appear in the present application, they only indicate the same direction as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application, which indicates or implies that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0038] Part of the term explanation: The terms "mounting", "connection", "connection", "fixing" and the like in the present application should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements, or the interaction relationship between two elements, for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] As introduced in the background, there are deficiencies in the prior art, in order to solve the above technical problems, the present application provides a kind of for cotton picker's impurity removal device.

[0040] In a typical embodiment of the present application, as Figure 1As shown in the accompanying drawings, embodiments of the present invention will be described below. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0041] like Figures 1-6 As shown in this embodiment, a cotton harvester impurity removal device includes a filter device 2, a primary impurity removal device 5, a secondary impurity removal device 1, and a tertiary impurity removal device 7 installed inside a cotton collection box 3. The filter device 2 is installed at the cotton inlet of the cotton collection box 3. The primary impurity removal device 5 is installed on top of the cotton collection box 3. Multiple secondary impurity removal devices 1 are arranged obliquely inside the cotton collection box 3. A cotton discharge roller is installed above the secondary impurity removal devices 1 and can rotate on a fixed axis to force cotton discharge. The tertiary impurity removal device 7 is installed at the cotton outlet of the cotton collection box 3. This invention, through the ingenious combination of the filter device, the primary impurity removal device, the secondary impurity removal device, and the tertiary impurity removal device, fundamentally reduces the impurity content of seed cotton, saves a significant amount of time and manpower in subsequent seed cotton cleaning, reduces costs, and is beneficial for the later processing and application of seed cotton.

[0042] Specifically, the spiked roller 4 is arranged at the cotton inlet of the cotton collecting box. The spiked roller 4 can rotate on a fixed axis, and the filter device 2 is installed below the spiked roller 4. The main function of the spiked roller 4 is to squeeze and rub the seed cotton. The upper surface of the filter device 2 is evenly distributed with small holes, which plays the role of filtering impurities and blocking the seed cotton from entering. The bottom surface of the filter device 2 is inclined so that the impurities entering the filter device 2 can be gathered in one place and easily discharged. That is, the added spiked roller 4 will squeeze and rub the seed cotton clump, so that the impurities inside the cotton can reach the surface and be further removed.

[0043] Furthermore, the primary impurity removal device 5 consists of an impurity removal fan 51 and an arc-shaped filter plate 52. The impurity removal fan 51 is arranged and installed on the top of the cotton collection box 3 along the width direction of the cotton harvester, and each impurity removal fan 51 corresponds to a cotton conveying channel 4. Before the seed cotton sent from the cotton conveying channel falls into the cotton collection box 3, it will be squeezed and rubbed by the spiked roller 4. Impurities on the upper side of the seed cotton will be sucked into the impurity removal fan 51 through the arc-shaped filter plate 52 due to the negative pressure suction of the impurity removal fan 51, and then collected or directly discharged from the machine body. Impurities on the lower side of the seed cotton will fall into the impurity removal device 2, thereby separating the impurities from the seed cotton.

[0044] Furthermore, the arc-shaped filter plate 52 is evenly distributed with small holes, which can be of any shape. Impurities in the seed cotton can pass through, while the seed cotton will be blocked. Finally, the seed cotton will fall into the cotton collection box due to gravity, thus playing the role of removing impurities.

[0045] Further, the secondary impurity removing device 1 is arranged obliquely inside the lint box 3, so that the flow of the seed cotton inside the lint box 3 is S-shaped to increase the impurity removing path, and the cotton removing roller 6 is installed above the secondary impurity removing device 1 and can rotate around a fixed shaft to forcibly remove the cotton, preventing the seed cotton from being blocked inside the lint box 3. In the embodiment, in order to make the flow of the seed cotton inside the lint box 3 S-shaped, the secondary impurity removing device 1 includes three, and the three secondary impurity removing devices 1 are arranged alternately and obliquely on the inner wall of the lint box 3. Of course, it is not difficult to understand that four, five or the like can also be arranged according to the needs.

[0046] Specifically, as shown in Figure 2 、 Figure 3 each secondary impurity removing device 1 in the embodiment is composed of a screen 17, a screen frame 14, a vibrator 15, a base 11, a damping spring 13, a rotating shaft 12 and a pressure sensor 16. The screen 17 is uniformly provided with small holes, can be of any shape, and is fixedly installed on the upper surface of the screen frame 14. The vibrator 15 is fixedly installed on the lower surface of the screen frame 14, and there is one on the left and one on the right. The vibrator 14 can be a vibration motor or a vibration motor. The screen frame 14 is connected with the base 11 through four damping springs 13, and the lower surface of the screen frame 14 and the bottom surface of the base 11 are both internally provided with a cylindrical small boss to provide a position for fixed installation of the damping spring 13. The rotating shaft 12 is fixedly installed on one side of the base 11 and is fixedly installed on the walls of the two sides of the cotton picker through bearings, so as to drive the secondary impurity removing device 1 to rotate around a fixed shaft. The bottom surface of the base 11 is inclined, so that the impurities can be gathered in one place and then discharged conveniently. The impurities collected by the secondary impurity removing device 1 are connected through a soft impurity discharging pipe 10 and discharged directly outside the machine body. The pressure sensor 16 is fixedly installed inside the secondary impurity removing device 1 and is used to detect the pressure of the screen 17 and the seed cotton, so as to ensure that the seed cotton inside the lint box 3 is not blocked. In the present application, the vibration source is installed at the bottom of the screen frame 14, and the connection between the screen frame 14 and the base 11 only relies on the four damping springs. In this way, when the vibration source works, the vibration is only transmitted to the screen frame 14 and the screen 17, and does not cause large vibration to the base 11. This is conducive to saving energy and can also achieve a better vibration effect.

[0047] Further, in order to realize the adjustment of the inclination angle of the secondary impurity removal device 1, the end of the rotating shaft 12 of the secondary impurity removal device 1 is connected with a gear, and the power of the stepping motor is branched and transmitted to each secondary impurity removal device 1 through the gear transmission. When the pressure detected by the pressure sensor 16 is too high, the stepping motor is started and rotates in the positive direction, so as to increase the inclination angle of the secondary impurity removal device 1, and the seed cotton can flow faster in the seed cotton collecting box 3. When the pressure detected by the pressure sensor 16 returns to normal, the stepping motor is started and reversely rotated to the initial position. The stepping motor is controlled by the controller of the cotton picker itself. In the present application, the inclination angle of the secondary impurity removal device is adjustable. The pressure of the seed cotton and the screen surface is detected by the pressure sensor, so as to determine whether the blockage is caused. If the blockage is caused, the inclination angle of the screen surface is increased through the rotation of the stepping motor, so as to facilitate the rapid discharge of the cotton.

[0048] As shown in Figure 3 the three secondary impurity removal devices 1 in the present embodiment are driven by the same stepping motor. Specifically, the shaft of the stepping motor transmits the power to the output gear of the stepping motor shaft through the shaft coupling, and transmits the power to the first transmission gear, the second transmission gear and the third transmission gear through the gear meshing, respectively. The three transmission gears correspond to the rotating shafts 12 of the three secondary impurity removal devices 1. Since the rotating direction of the second transmission gear needs to be opposite to that of the first transmission gear and the third transmission gear, an idler gear is needed to change the rotating direction.

[0049] Further, the opening rollers 9 are dispersedly arranged at the bottom of the seed cotton collecting box 3. Before the seed cotton is fed into the cotton conveying belt assembly 8, the compacted and entangled seed cotton can be loosened by the opening rollers 9, so as to rub the cotton, and the impurities in the seed cotton cluster come to the outside of the seed cotton cluster, so as to prepare for the tertiary impurity removal.

[0050] Further, the cotton conveying belt assembly 8 is located at the front end of the bottom of the baling bin, and includes a cotton conveying belt. The cotton conveying belt is composed of a filter grid structure. The seed cotton loosened by the opening rollers 9 falls onto the cotton conveying belt assembly 8.

[0051] Further, the tertiary impurity removal device 9 is arranged below the cotton conveying belt assembly 8. The tertiary impurity removal device 9 is composed of an impurity removal fan 71, an impurity discharge groove 72 and an impurity discharge pipeline 73. When the seed cotton falls onto the cotton conveying belt assembly 8 and starts to be fed from front to back, the impurity removal fan 71 is started to form a negative pressure suction force. The impurities which are not removed by the primary impurity removal device 5 and the secondary impurity removal device 1 pass through the filter grid structure of the cotton conveying belt, are sucked into the air inlet of the impurity removal fan 71, and are discharged through the air outlet. The bottom of the impurity discharge groove 72 of the tertiary impurity removal device 9 is designed as an inclined structure, and the lowest point is connected with the impurity discharge pipeline 73. The impurities discharged through the air outlet are discharged out of the machine body through the impurity discharge pipeline 73.

[0052] Further, the impurity removing fan 51 of the first impurity removing device 5 is the same structure as the impurity removing fan 71 of the third impurity removing device 9.

[0053] Further, the cotton conveying belt assembly 8 continuously feeds the impurity removed seed cotton into the packing device in the packing bin to pack the seed cotton.

[0054] In the present application, the impurities pass through the screen surface, and the cotton continuously moves downward on the screen surface while vibrating, thereby realizing continuous conveying of the cotton, and the impurities are collected by the secondary impurity removing device while vibrating, and do not share a channel with the cotton, so that the impurity removal is more thorough. The flow direction of the seed cotton is changed into S shape, and the movement path of the seed cotton is increased, so that the seed cotton passes through more secondary impurity removing devices, and the impurity removal is more thorough.

[0055] The first impurity removing device arranged above the seed cotton collecting box uses the fan to form suction force to collect the impurities, and the seed cotton is blocked outside by the arc-shaped filter plate, so that the surface impurities of the seed cotton can be effectively removed, and the seed cotton is preliminarily discharged outside the machine body to reduce the impurity content of the seed cotton. The secondary impurity removing device is installed in the seed cotton collecting box, and the impurities in the seed cotton are turned to the surface under the action of the extrusion and rubbing of the spike roller. The seed cotton is further cleaned under the action of vibration, and the secondary impurity removing device is arranged in the seed cotton collecting box in an inclined manner, so that the flow of the seed cotton in the seed cotton collecting box is S-shaped to increase the impurity removal path, and the impurities are cleaned more thoroughly. The seed cotton is forced to be discharged by the seed cotton discharging roller, and the pressure sensor is used to detect whether the seed cotton in the seed cotton collecting box is blocked. If the seed cotton is blocked, the inclination angle of the secondary impurity removing device can be automatically adjusted to speed up the flow of the seed cotton. The control of the stepping motor is realized by the controller of the cotton picker itself, and no additional controller is needed. After the first impurity removing device and the secondary impurity removing device, a small amount of impurities are cleaned by the third impurity removing device, so that the impurity removal is more thorough, the impurity content of the seed cotton is further reduced, the utilization rate of the seed cotton is improved, a large amount of time and manpower for cleaning the seed cotton is saved, the cost is reduced, and the processing and application of the seed cotton in the later stage are facilitated.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cleaning device for a cotton harvester, characterized in that, The device comprises a filter device installed in the lint box, a first impurity removal device, a second impurity removal device and a third impurity removal device; the filter device is installed at the lint inlet of the lint box, the upper surface of the filter device is uniformly provided with filter holes, the inner bottom surface of the filter device is inclined, and a spike roller is installed above the filter device and can rotate on a fixed shaft; The first impurity removal device is installed at the top of the lint box, the first impurity removal device is composed of an impurity removal fan and an arc-shaped filter plate, the impurity removal fan is arranged along the width direction of the cotton picker and installed at the top of the lint box, and the arc-shaped filter plate is arranged below the impurity removal fan; a plurality of second impurity removal devices are arranged in the lint box, the plurality of second impurity removal devices are alternately arranged in the lint box, a lint discharge roller is installed above the second impurity removal device and can rotate on a fixed shaft to forcibly discharge the lint; the second impurity removal device is composed of a screen, a screen frame, a vibrator, a base, a damping spring, a rotating shaft and a pressure sensor, the screen is fixedly installed on the upper surface of the screen frame, the vibrator is fixedly installed on the lower surface of the screen frame, the screen frame and the base are connected through the damping spring, one side of the base is fixedly provided with the rotating shaft, the rotating shaft is fixedly installed on the wall of the lint box through a bearing and can drive the second impurity removal device to rotate on a fixed shaft, the pressure sensor is fixedly installed in the second impurity removal device, the pressure of the seed cotton and the screen surface is checked according to the pressure sensor, whether the second impurity removal device is blocked is judged, and then the rotating shaft is driven to rotate to adjust the inclination angle of the second impurity removal device; the third impurity removal device is installed at the lint outlet of the lint box, a lint conveying belt is installed at the lint outlet, the third impurity removal device is composed of an impurity removal fan, an impurity discharge groove and an impurity discharge pipeline, the impurity removal fan is arranged below the lint conveying belt, the lint conveying belt is composed of a filter grid, the bottom of the impurity discharge groove is inclined, and the lowest point is connected with the impurity discharge pipeline; the impurity removal fan can generate a negative pressure suction force.

2. The boll weevil eliminator for a cotton picker as set forth in claim 1, wherein, The rotating shafts of the plurality of second impurity removal devices are driven by the same motor, and the motor simultaneously drives the rotating shafts of the plurality of second impurity removal devices through a gear transmission device.

3. The boll weevil eliminator for a cotton picker as set forth in claim 1, wherein, The inner bottom surface of the base is inclined, so that the impurities can be gathered in one place.

4. The boll weevil control system for a cotton harvester as claimed in claim 1, wherein, The impurities collected by the filter device and the second impurity removal device are communicated through a hose and directly discharged outside the machine.

5. The boll weevil control device for a cotton harvester as claimed in claim 1, wherein, The damping spring is provided in multiple numbers.

6. The boll weevil eliminator for a cotton picker as set forth in claim 1, wherein, The lower surface of the screen frame and the inner bottom surface of the base are both provided with cylindrical small bosses to provide positions for the fixed installation of the damping spring.

7. The boll weevil eliminator for a cotton picker as set forth in claim 1, wherein, Each impurity removal fan corresponds to a lint conveying channel, and the arc-shaped filter plate is uniformly provided with filter holes.

8. The boll weevil eliminator for a cotton picker as set forth in claim 1, wherein, The lint outlet and the lint conveying belt are dispersively provided with opening rollers.

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