Pre-charged diversion type seed cotton residual film static electricity removing device

Abstract

The invention belongs to the field of agricultural machinery, and relates to a pre-charge flow guide type seed cotton residual film static electricity removing device which comprises a support, a cotton feeding box, a cotton collecting box, a pre-charge flow guide part, a main charge removing part, an electrode adjusting mechanism and an electrode clamping mechanism. The main charge clearing part comprises main wallboards on two sides, a main charge corona electrode, a grounding roller and an air knife mounted on the back side of the grounding roller; the pre-charged flow guide part mainly comprises a metal cotton flowing plate, pre-charged wall plates on the two sides and a pre-charged corona electrode; residual films pass through an electric field area formed by the pre-charged corona electrode and the metal cotton dripping plate, the initial charge capacity of the residual films is improved, the metal cotton dripping plate is moved, the contact position and collision behavior of seed cotton materials and the rotating roller are changed, and the residual films are separated under the electrostatic adsorption effect of the main charge removing part; the charging effect is enhanced in a pre-charging mode, adjustment of motion parameters of seed cotton materials is achieved through the flow guide effect, and the electrostatic removal efficiency of seed cotton residual films is improved.

Description

Technical Field

[0001] The present invention belongs to the field of agricultural machinery, and mainly relates to a pre-charged and flow-guided electrostatic cleaning device for residual film in unginned cotton, which belongs to a foreign fiber cleaning device in the process of unginned cotton processing. Background Art

[0002] The content of foreign fibers is a key factor affecting the purchase price of cotton and the quality of cotton textiles. The needle roller type electrostatic cleaning device for residual film in unginned cotton designed by using electrostatic adsorption technology is applied to the production of unginned cotton due to its advantages such as reliable device, simple structure, low cost and high production efficiency. Its principle is that the charging characteristics of unginned cotton and residual films and other foreign fibers are different. After entering the electric field, the residual film is adsorbed on the rotating roller under the action of the electric field force, and the unginned cotton enters the next process due to the gravity being much greater than the electric field force. The currently designed electrostatic cleaning device for residual film in unginned cotton does not have a pre-charging and guiding part, and the unginned cotton directly enters the main charging and cleaning part after passing through the previous process. The process of charging and separation is realized through the corona electrode and the rotating roller, and there are problems such as insufficient single-time charging and insufficient contact between the cotton film and the rotating roller, resulting in low cleaning efficiency of the residual film cleaning device.

[0003] Chinese Patent CN114393746A invented a machine-picked unginned cotton residual film electrostatic separation device. This device uses a needle roller type structure to realize the electrostatic separation of unginned cotton and residual film, and can adjust parameters such as the position of the corona electrode and the electrostatic voltage of the main charging and cleaning part to obtain the best parameter combination for the separation effect. Chinese Patent CN113638080A invented an electrostatic type unginned cotton foreign fiber cleaning modular device. This device uses a double-stage corona electrode plus a single-stage static electrode structure, which increases the charge amount of the residual film after entering the electrostatic field and improves the separation efficiency of unginned cotton and foreign fibers. However, in the existing above-mentioned residual film electrostatic cleaning devices, there are problems of insufficient charge amount of the residual film and low separation efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of insufficient charge amount of the residual film and low separation efficiency in the existing needle roller type electrostatic cleaning device for residual film in unginned cotton, and provide a pre-charged and flow-guided electrostatic cleaning device for residual film in unginned cotton, which greatly improves the cleaning efficiency of the residual film in unginned cotton. By adding a pre-charging and guiding part, the present invention improves the initial charge amount of the residual film, and can also change the contact position and collision behavior between the unginned cotton material and the rotating roller according to two factors of the unginned cotton feeding amount and the separation effect, so as to realize the efficient cleaning of the residual film in machine-picked unginned cotton.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pre-charged and flow-guided electrostatic cleaning device for seed cotton and residual film, comprising a bracket, a cotton feeding box, and a cotton collecting box, characterized by further comprising a pre-charging and flow-guiding part, a main charging and cleaning part, an electrode adjusting mechanism, and an electrode clamping mechanism; the main charging and cleaning part includes main wallboards on both sides, a main charging corona electrode, a grounding roller, and an air knife installed on the back side of the grounding roller; the pre-charging and flow-guiding part mainly includes a metal cotton flowing plate, pre-charging wallboards on both sides, and a pre-charging corona electrode; the pre-charging wallboards are installed above the main wallboards, the metal cotton flowing plate is inclined and arranged below the cotton feeding box, and is detachably connected to the pre-charging wallboards; the main charging corona electrode is arranged between the main wallboards on both sides through the electrode adjusting mechanism and the electrode clamping mechanism, and the pre-charging corona electrode is installed between the pre-charging wallboards on both sides through the electrode adjusting mechanism and the electrode clamping mechanism.

[0007] Preferably, the structure of the electrode adjusting mechanism mainly includes a length adjusting nut and a lead screw, and the electrode clamping mechanism includes a rectangular support plate, an electrode tube clamp, and a tube clamp fixing bolt. The lead screw passes through the through hole on the upper surface of the rectangular support plate and is welded to the electrode tube clamp; in the pre-charging and flow-guiding part, the distance between the pre-charging corona electrode and the metal cotton flowing plate is adjusted by the length adjusting nut; the tip of the pre-charging corona electrode is facing the surface of the metal cotton flowing plate, and the needle pitch can be selected according to the actual processing situation to ensure the stability of the electrostatic field. Both the main charging corona electrode and the pre-charging corona electrode are connected to a high-voltage electrostatic generator, and the high-voltage electrostatic generator is grounded.

[0008] Preferably, the pre-charging wallboard is provided with a horizontal long strip-shaped chute, the inclination angle of the metal cotton flowing plate remains unchanged, and the metal cotton flowing plate can move back and forth within a certain range along the long strip-shaped chute. The metal cotton flowing plate that moves back and forth enables the seed cotton material to slide above the grounding roller, and the included angle range between the sliding direction and the horizontal plane direction of the central axis of the grounding roller is 0-90°. The seed cotton material passing through the metal cotton flowing plate obtains a certain kinetic energy. While increasing the processing capacity, the seed cotton material impacts the surface of the grounding roller, weakening the bonding force between the seed cotton and the residual film, making it easier for the residual film to be adsorbed onto the grounding roller.

[0009] Preferably, the main wallboards in the main charging and cleaning part are installed on the bracket, the main charging corona electrode is installed on one side of the grounding roller and is connected to a high-voltage electrostatic generator at one end; the air knife and the film collecting box are installed on the opposite side of the grounding roller. The upper end of the air knife is connected to an external blower through an air duct to blow the residual film adsorbed on the surface of the grounding roller into the film collecting box; both ends of the grounding roller are fixed on the main wallboards through rotating shafts and bearing seats, and the motor drives the grounding roller to rotate around its own axis. The motor is connected to a frequency converter for adjusting the rotation speed of the grounding roller.

[0010] Preferably, the falling speed of the material is lower than the charging speed of the residual film in the electric field, so as to ensure that the initial charge of the residual film is sufficient.

[0011] Preferably, the pre-charged wall panels and the main wall panels are made of anti-static materials; the grounding roller and the metal wool dripping plate are provided with grounding terminals.

[0012] Preferably, the range of the absolute value of the pre-charged corona electrode voltage is 15-60kV.

[0013] Preferably, the transmission mode between the motor and the grounded roller shaft can be belt pulley transmission, gear transmission or sprocket transmission according to actual needs. The lower end opening of the wind knife is along the tangent direction of the grounded roller surface, the film collecting box is located below the grounded roller, and the side wall is connected to the main wall panel by bolts and nuts to receive the residual film blown off by the wind knife.

[0014] Compared with the existing technology, the advantages of the present invention are:

[0015] The present invention sets a pre-charged flow guide module below the cotton feeding port, and increases the initial charge of the residual film through the charging effect of the electrostatic field formed between the corona electrode and the metal cotton dripping plate. According to the seed cotton feeding amount and the residual film removal effect, the position of the metal cotton dripping plate is changed, thereby changing the contact position and collision behavior between the seed cotton material and the roller. After the material passes through the flow guide effect of the metal cotton dripping plate, it obtains a certain amount of kinetic energy, and the seed cotton material hits the surface of the grounded roller, which weakens the cohesive force between the seed cotton and the residual film, making the residual film more easily adsorbed on the grounded roller. The invention provides a pre-charged conductive flow-conducting electrostatic removal device for residual film of seed cotton. The innovation point of the device is that a pre-charged conductive flow-conducting part is added. The pre-charged conductive flow-conducting part can increase the initial charge of the residual film and regulate the movement trajectory of the seed cotton material when it falls. The seed cotton material obtains a certain kinetic energy through the conductive effect of the metal cotton flowing plate. The material hits the surface of the grounded rotating roller, which weakens the bonding force between the seed cotton and the residual film and improves the residual film removal efficiency. The device effectively solves the problems of insufficient charge of the residual film and low separation efficiency in the existing needle roller type electrostatic removal device for residual film of seed cotton. The device has a simple structure and is efficient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the pre-charged conductive type seed cotton residual film electrostatic removal device provided in an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the main structure of the pre-charged conductive type seed cotton residual film electrostatic removal device provided in an embodiment of the present invention.

[0018] Figure 3 It is a side view of the pre-charged conduction part of the pre-charged conduction type seed cotton residual film electrostatic removal device provided in an embodiment of the present invention.

[0019] Figure 4 This is a schematic structural diagram of the electrode adjustment mechanism and the electrode clamping mechanism of the pre-charged and flow-guided electrostatic cotton-seed cotton residue film removal device provided in the embodiment of the present invention.

[0020] The descriptions of the reference numerals in the drawings are as follows:

[0021] 1 - Blower; 2 - Blower support; 3 - Flange; 4 - Positive pressure pipeline; 5 - Cotton feeding box; 6 - Metal cotton flowing plate; 7 - Pre-charged corona electrode; 8 - Pre-charged wall panel; 8-1 Long strip-shaped chute, 9 - Main wall panel; 10 - Large pulley; 11 - Small pulley; 12 - Belt; 13 - Air knife; 14 - Film collecting box; 15 - Main charged corona electrode; 16 - Motor A; 17 - High-voltage electrostatic generator; 18 - Frequency converter; 19 - Support; 20 - Motor B; 21 - Bearing seat; 22 - Grounding roller; 23 - Pipe clamp fixing bolt; 24 - Lead screw; 25 - Length adjustment nut; 26 - Electrode pipe clamp; 27 - Rectangular support plate; 28 - Hinge; 29 - Horizontal plate. Specific embodiments

[0022] The present invention will be described in detail below in conjunction with specific embodiments, but it is not intended to limit the patent of the present invention.

[0023] Embodiment 1:

[0024] A pre-charged and flow-guided electrostatic cotton-seed cotton residue film removal device includes a support 19, a cotton feeding box 5, a cotton collecting box 14, a pre-charged and flow-guided part, a main charged and removing part, an electrode adjustment mechanism, and an electrode clamping mechanism; the main charged and removing part includes main wall panels 9 on both sides, a main charged corona electrode 15, a grounding roller 22, and an air knife 13 installed on the back side of the grounding roller 22; the pre-charged and flow-guided part mainly includes a metal cotton flowing plate 6, pre-charged wall panels 8 on both sides, and a pre-charged corona electrode 7; the pre-charged wall panel 8 is installed above the main wall panel 9, the metal cotton flowing plate 6 is inclined below the cotton feeding box 5 and is detachably connected to the pre-charged wall panel 8; the main charged corona electrode 15 is arranged between the main wall panels 9 on both sides through the electrode adjustment mechanism and the electrode clamping mechanism, and the pre-charged corona electrode 7 is installed between the pre-charged wall panels 8 on both sides through the electrode adjustment mechanism and the electrode clamping mechanism.

[0025] The structure of the electrode adjustment mechanism mainly includes a length adjustment nut 25 and a lead screw 24. The electrode clamping mechanism includes a rectangular support plate 27, an electrode pipe clamp 26, and a pipe clamp fixing bolt 23. The lead screw 24 passes through a through hole on the upper surface of the rectangular support plate 27 and is welded to the electrode pipe clamp 26. In the pre-charging current guiding part, the distance between the pre-charging corona electrode 7 and the metal cotton dripping plate 6 is adjusted by the length adjustment nut 25. The tip of the pre-charging corona electrode 7 faces the surface of the metal cotton dripping plate 6. The needle pitch can be selected according to the actual processing conditions as long as the electrostatic field is stable. Both the main charging corona electrode 15 and the pre-charging corona electrode 7 are connected to a high-voltage electrostatic generator 17, and the high-voltage electrostatic generator 17 is grounded.

[0026] The pre-charging wall panel 8 is provided with a horizontal long strip-shaped chute 8-1. The inclination angle of the metal cotton dripping plate 6 remains unchanged. The metal cotton dripping plate 6 can move back and forth within a certain range along the long strip-shaped chute 8-1. The metal cotton dripping plate 6 that moves back and forth causes the unginned cotton material to slide above the grounded roller 22. The included angle between the sliding direction and the horizontal plane where the central axis of the grounded roller 22 is located ranges from 0 to 90°. The unginned cotton material passing through the metal cotton dripping plate 6 obtains a certain kinetic energy. While increasing the processing capacity, the unginned cotton material impacts the surface of the grounded roller 22, weakening the binding force between the unginned cotton and the residual film, making it easier for the residual film to be adsorbed onto the grounded roller 22.

[0027] The main wall panel 9 in the main charging and cleaning part is installed on the bracket 19. The main charging corona electrode 15 is installed on one side of the grounded roller 22 and is connected to the high-voltage electrostatic generator 17 at one end. The air knife 13 and the film collecting box 14 are installed on the opposite side of the grounded roller 22. The upper end of the air knife 13 is connected to an external blower through an air duct to blow the residual film adsorbed on the surface of the grounded roller 22 into the film collecting box 14. Both ends of the grounded roller 22 are fixed to the main wall panel 9 through rotating shafts and bearing seats. The motor A16 drives the grounded roller 22 to rotate around its own axis. The motor A16 is connected to a frequency converter 18 for adjusting the rotation speed of the grounded roller 22.

[0028] The falling speed of the unginned cotton material is less than the charging speed of the residual film in the electric field to ensure sufficient initial charge of the residual film. Among them, the pre-charging wall panel 8 and the main wall panel 9 are made of anti-static materials. The grounded roller 22 and the metal cotton dripping plate 6 are provided with grounding terminals. The absolute value range of the voltage of the pre-charging corona electrode 7 is 15 - 60 kV.

[0029] The transmission method between the motor A16 and the grounded roller 22 can adopt belt pulley transmission, gear transmission, or sprocket transmission according to actual needs.

[0030] In the present invention, the blower 1 is installed on the blower bracket 2, and the hinge 28 fixes the horizontal plate 29 on the cotton feeding box 5. In the pre-charging and guiding section, two long strip-shaped sliding grooves 8-1 are formed on the pre-charging wall panel 8. Four threaded holes are formed on the side wall of the metal cotton flowing plate 6, and the metal cotton flowing plate is fixed on the pre-charging wall panel 8 through a bolt group. The front and rear positions of the metal cotton flowing plate 6 can move within a certain range. Between the pre-charging corona electrode 7 and the pre-charging wall panel 8, they are connected through an electrode adjusting mechanism and an electrode clamping mechanism. The electrode adjusting mechanism includes a lead screw 24 and a length adjusting nut 25. The electrode clamping mechanism includes a pipe clamp fixing bolt 23, an electrode pipe clamp 26, and a rectangular support plate 27. The lead screw 24 passes through the through hole on the upper surface of the rectangular support plate 27 and is welded to the electrode pipe clamp 26. The length adjusting nut 25 controls the distance between the pre-charging corona electrode 7 and the metal cotton flowing plate 6. The tip of the pre-charging corona electrode 7 is facing the surface of the metal cotton flowing plate 6. One end of the pre-charging corona electrode 7 is connected to the high-voltage electrostatic generator 17. The metal cotton flowing plate 6 is provided with a grounding terminal, and the pre-charging wall panel is made of an anti-static material. In the main charging and removing section, the air knife 13, the film collecting box 14, and the main charging corona electrode 15 are all installed on the main wall panel 9. The rotating shaft of the grounding roller 22 is installed on the main wall panel 9 through the bearing seats 21 at both ends. The motor A16 is connected to the rotating shaft of the grounding roller 22 through the small pulley 11, the belt 12, and the large pulley 10 to drive the grounding roller 22 to rotate. The motor A16 is connected to the frequency converter 18, so that the rotation speed of the grounding roller 22 can be adjusted between 0 - 500 r / min. The lower opening of the air knife 13 is along the tangential direction of the surface of the grounding roller 22. The film collecting box 14 is located below the grounding roller 22, and the side wall is connected to the main wall panel 9 through bolts and nuts to receive the residual film blown off by the air knife.

[0031] In this embodiment, when the residual film passes through the electric field region formed by the pre-charging corona electrode 7 and the metal cotton flowing plate 6, the initial charge amount of the residual film is increased. The unginned cotton material obtains a certain momentum through the guiding action of the metal cotton flowing plate 6. By moving the metal cotton flowing plate 6, the contact position and collision behavior between the unginned cotton material and the grounding roller 22 are changed, and the residual film is separated by the electrostatic adsorption action of the main charging and removing section. The charging effect is enhanced through the pre-charging method, and the motion parameters of the unginned cotton material are made adjustable through the guiding action, thereby improving the electrostatic removal efficiency of the unginned cotton and residual film.

[0032] Place the unginned cotton material at the horizontal plate of the cotton feeding box 5, then turn on the high-voltage electrostatic generator 17 connected to the pre-charging corona electrode 7, adjust the absolute value of the voltage of the pre-charging corona electrode 7 to 25 kV, evenly push the unginned cotton material into the cotton feeding box 5, and make the unginned cotton material freely slide on the surface of the metal cotton flowing plate 6. Adjust the absolute value of the voltage of the main charging corona electrode 15 to 25 kV, and adjust the linear velocity of the grounding roller 22 to 3 m / s. Ensure that the unginned cotton material falls within the range of 40 - 50° above the horizontal plane of the central axis of the grounding roller 22. Take the average value of the mass of the residual film finally collected in the film collecting box 14 and calculate the residual film removal rate.

[0033] The results show that: through the pre-charging effect in Example 2, the charging effect of the electrostatic field formed between the corona electrode and the metal cotton-flowing plate enables the machine-picked seed cotton material to pass through, increasing the initial charge amount of the residual film. Compared with the seed cotton residual film electrostatic cleaning device without pre-charging and with all other conditions being the same, the residual film removal rate has increased by 5.7% after adding pre-charging.

[0034] Example 2:

[0035] Compared with Example 1, the difference lies in: placing the seed cotton material at the horizontal plate of the cotton feeding box 5, evenly pushing the seed cotton material into the cotton feeding box 5 so that the seed cotton material freely slides on the surface of the metal cotton-flowing plate 6. Adjust the absolute value of the voltage of the main charging corona electrode 15 to 25 kV, adjust the linear speed of the grounded roller to 3 m / s. Through the long strip holes opened in the pre-charging wall panel, move the position of the metal cotton-flowing plate 6 to ensure that the seed cotton material falls within the range of 20 - 30° above the horizontal plane of the central axis of the grounded roller 22. Take the average value of the mass of the residual film finally collected in the film collecting box 14 and calculate the residual film removal rate.

[0036] The results show that: through the guiding effect of the cotton-flowing plate, the contact position and collision behavior between the seed cotton material and the roller are changed. Compared with the seed cotton residual film electrostatic cleaning device where the seed cotton material falls within the range of 40 - 50° above the horizontal plane of the central axis of the grounded roller 22 and with all other conditions being the same, moving the position of the metal cotton-flowing plate so that the seed cotton material falls within the range of 20 - 30° above the horizontal plane of the central axis of the grounded roller 22, the removal rate has increased by 5.9%.

[0037] Example 3:

[0038] Compared with Example 1, the difference lies in: placing the seed cotton material at the horizontal plate of the cotton feeding box 5, then turning on the power of the blower 1. The positive pressure air flow generated by the blower 1 passes through the positive pressure pipeline 4 to the cotton feeding box 5. Turn on the high-voltage electrostatic generator 17 connected to the pre-charging corona electrode 7, adjust the absolute value of the voltage of the pre-charging corona electrode 7 to 25 kV. Through the long strip holes opened in the pre-charging wall panel, move the position of the metal cotton-flowing plate 6 to ensure that the seed cotton material falls within the range of 20 - 30° above the horizontal plane of the central axis of the grounded roller 22, and evenly push the seed cotton material into the cotton feeding box 5. Adjust the absolute value of the voltage of the main charging corona electrode 15 to 25 kV, and adjust the linear speed of the grounded roller to 3 m / s. Take the average value of the mass of the residual film finally collected in the film collecting box 14 and calculate the residual film removal rate.

[0039] The results show that: compared with the traditional seed cotton residual film electrostatic cleaning device, in Example 4, by adding a positive pressure cotton feeding part and a pre-charging guiding part, the removal rate of the seed cotton residual film has increased significantly, with the removal rate increasing by 9.5%.

[0040] Example 4:

[0041] Compared with Embodiment 3, the difference in this embodiment is that: the position of the movable metal cotton flowing plate 6 is adjusted to ensure that the unginned cotton material falls to a position 0° above the horizontal plane of the central axis of the grounded roller 22.

[0042] Embodiment 5:

[0043] Compared with Embodiment 3 and Embodiment 4, the difference in this embodiment is that: the position of the movable metal cotton flowing plate 6 is adjusted to ensure that the unginned cotton material falls to a position 90° above the horizontal plane of the central axis of the grounded roller 22.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-charged conductive type seed cotton residual film electrostatic removal device, comprising a bracket, a cotton feeding box, and a cotton collecting box, characterized in that It also includes a precharged current guide part, a main charge removal part, an electrode adjustment mechanism, and an electrode clamping mechanism; the main charge removal part includes main wall panels on both sides, a main charge corona electrode, a grounded roller, and a wind knife installed on the back side of the grounded roller; the precharged current guide part mainly includes a metal cotton dripping plate, precharged wall panels on both sides, and a precharged corona electrode; the precharged wall panels are installed above the main wall panels, and the metal cotton dripping plate is tilted below the cotton feeding box and is detachably connected to the precharged wall panels; the main charge corona electrode is arranged between the main wall panels on both sides through the electrode adjustment mechanism and the electrode clamping mechanism, and the precharged corona electrode is installed between the precharged wall panels on both sides through the electrode adjustment mechanism and the electrode clamping mechanism.

2. A pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 1, characterized in that: The structure of the electrode adjustment mechanism includes a length adjustment nut and a lead screw, the electrode clamping mechanism includes a rectangular support plate, an electrode tube clamp, and a tube clamp fixing bolt, and the lead screw passes through a through hole on the rectangular support plate and is welded to the electrode tube clamp; in the precharged current guide portion, the distance between the precharged corona electrode and the metal cotton dripping plate is adjusted by the length adjustment nut; the needle tip of the precharged corona electrode faces the surface of the metal cotton dripping plate, and the needle spacing is selected according to actual processing conditions to ensure the stability of the electrostatic field, and the main charged corona electrode and the precharged corona electrode are both connected to a high-voltage electrostatic generator, and the high-voltage electrostatic generator is grounded.

3. A pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 1 or 2, characterized in that: The pre-charged wall panel is provided with a horizontal long strip slide, and the inclination angle of the metal cotton dripping plate remains unchanged. The metal cotton dripping plate can be moved forward and backward within a certain range along the long strip slide. The metal cotton dripping plate that moves forward and backward makes the seed cotton material slide to the top of the grounded roller, and the angle range between the sliding direction and the horizontal plane direction where the center axis of the grounded roller is located is 0-90°. The seed cotton material passing through the metal cotton dripping plate obtains a certain kinetic energy. While increasing the processing capacity, the seed cotton material hits the surface of the grounded roller, weakening the bonding force between the seed cotton and the residual film, so that the residual film is easily adsorbed onto the grounded roller.

4. A pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 3, characterized in that: The main wall panel is installed on the bracket, the main charged corona electrode is installed on one side of the grounded roller, the wind knife and the film collecting box are installed on the opposite side of the grounded roller, and the upper end of the wind knife is connected to an external blower through an air duct to blow the residual film adsorbed on the surface of the grounded roller into the film collecting box; both ends of the grounded roller are fixed on the main wall panel, and the motor drives the grounded roller to rotate around its own axis. The motor is connected to the frequency converter to adjust the rotation speed of the grounded roller.

5. The pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 4, characterized in that The falling speed of the seed cotton material is lower than the charging speed of the residual film in the electric field, which ensures that the initial charge of the residual film is sufficient.

6. A pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 5, characterized in that: The pre-charged wall panels and the main wall panels are made of anti-static materials; the grounding roller and the metal cotton dripping plate are provided with grounding terminals.

7. A pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 6, characterized in that: The range of the absolute value of the pre-charged corona electrode voltage is 15-60 kV.

8. The pre-charged conductive type seed cotton residual film electrostatic removal device according to claim 7, characterized in that The transmission mode between the motor and the grounding roller is belt pulley transmission, gear transmission or sprocket transmission according to actual needs.

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