A pneumatic cutting and recovery device for tobacco topping

Abstract

The present invention discloses a pneumatic cutting and recovery device for tobacco topping, which includes a cover body with an open lower end, a topping knife group installed in the cover body, and a vertical knife shaft with multiple blades staggered in the axial direction, the knife shaft being driven by a first motor; a discharge channel is provided on the rear side of the cover body; an air inlet pipe is also provided, and the gas entering the air inlet pipe can form an oblique downward airflow; an inlet portion is provided on the front side of the cover body, and brushes are symmetrically installed on both sides of the inlet portion; a first air outlet hole is provided on the inner wall of the cover body, which is connected to the air inlet pipe, and blows out an oblique upward airflow; in the direction from bottom to top, the length of the blades on the knife shaft gradually increases from short to long. The pneumatic cutting and recovery device of the present invention facilitates the top of the plant to enter the cover body, uses a rotating airflow to maintain the posture of the plant, and cuts the top of the plant section by section, which better meets the topping requirements of tobacco crops.

Description

Technical Field

[0001] The invention relates to the technical field of crop topping devices, in particular to a pneumatic cutting and recovery device for tobacco topping. Background Art

[0002] During the cultivation process of tobacco plants, the plants need to be topped to eliminate the dominant position of the top of the plant and promote the growth of the middle and lower parts of the plant.

[0003] In the prior art, patent CN206651082U provides a plant topping and collection machine, which includes a housing, a motor, a cutting component, and a collection bucket. An output port is provided at one end of the housing, which is connected to the collection bucket and is used to collect the remaining cut material. During the topping process, the motor rotates to drive the cutting blade to rotate at high speed, and the airflow moves from bottom to top. When the cutting blade cuts the plant to be cut, under the action of airflow and inertia, the cut material enters the collection bucket through the feed port. The cut material is filtered by the tail baffle and stored in the collection bucket, and the air is discharged through the exhaust hole of the baffle. In this solution, the length of the plant top that needs to be cut is short, and the plant top enters the shell from the lower opening of the housing and is toppled. Therefore, this solution is suitable for topping crops with a short top that needs to be toppled. However, for tobacco plants, the top that needs to be toppled is longer (generally 20cm-30cm). Using the above-mentioned topping mechanism to top crops can lead to problems such as the top of the plant being too long to enter the housing, the toppled top being too long to be cut off in time, and easily becoming entangled with the cutter blade and unable to be discharged. Furthermore, patent CN115380727A discloses a technical solution for using a deflector to press down the leaves of the plant to facilitate the exposure of the terminal bud. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a pneumatic cutting and recovery device for tobacco topping that is adapted to the topping requirements of tobacco crops.

[0005] Technical Solution: To achieve the above-mentioned purpose, the pneumatic cutting and recovery device for tobacco topping of the present invention comprises a cover body with an open lower end, a topping knife assembly mounted in the cover body, the topping knife assembly comprising a vertical knife shaft having a plurality of blades staggered in the axial direction, the knife shaft being driven by a first motor; a discharge channel is provided on the rear side of the cover body;

[0006] The invention also includes an air inlet pipe, wherein the gas entering the air inlet pipe can form an oblique downward airflow, which can blow the large tobacco leaves downward to prevent the large leaves from entering the cover;

[0007] The front side of the cover has an entrance, and brushes are symmetrically installed on both sides of the entrance. The bristles of the brushes are arranged horizontally, so that there is a central, vertically extending gap between the two brushes. When no tobacco top enters the cover, the gap is in a closed state. When the top of the plant enters the cover, the top of the plant squeezes the brushes to expand the gap and then enters the cover;

[0008] The inner wall of the cover is provided with a first air outlet connected to the air inlet pipe, and the first air outlet blows out an obliquely upward air flow;

[0009] In the direction from bottom to top, the length of the blade on the knife shaft gradually changes from short to long.

[0010] Furthermore, there are multiple first air outlets. Each of the first air outlets is arranged on the side wall of the housing. A channel is formed in the side wall of the housing to connect the multiple first air outlets, and the channel is connected to the air inlet pipe. In this way, air can be discharged from all of the first air outlets without the need for laying complex ducts.

[0011] In the above structure, on the one hand, the brush serves to close the entrance on the front side of the cover body, so that the space inside the cover body is open at the bottom and surrounded by entities on all four sides. In this way, the airflow blown out of all the first air outlets can form a rotating airflow in the cover body, and the rotating airflow can act on the top of the tobacco, so that the top of the tobacco has a tendency to be straightened, so that the topping knife group can better act on the top of the plant. On the other hand, the brush serves to facilitate the entry of the top of the plant, and because the fixed end of the bristles of the brush is not easily deformed, while the free end is easily deformed, the two symmetrically installed brushes can serve to center the top of the plant, so that the top can be affected by the rotating airflow after entering the cover body. Preferably, the brush is tilted backward, and a V-shaped structure is formed between the two brushes when viewed from above, so that the top of the plant can be better guided.

[0012] During the topping process, the top of the plant squeezes through the brush and enters the cover. The top of the plant entering the cover is kept upright by the rotating airflow. Since the blade on the upper side of the knife shaft is long and the blade on the lower side is short, the upper blade acts on the top of the plant first, and the lower blade acts on the top of the plant later. In this way, the top can be gradually cut off from top to bottom, realizing the segmented cutting of the longer top of the tobacco crop to be cut off. The topping process is reasonable, and the crop tops cut off in segments are more easily caught by the rotating airflow and enter the discharge channel and then discharged backwards.

[0013] Furthermore, the first air outlet holes are arranged on the left and right side walls of the cover body, and each side wall has a vertical hole array and a horizontal hole array arranged in an L-shaped layout. The vertical hole array is close to the inlet portion, and the horizontal hole array is close to the lower edge of the side wall. The airflow blown out by the first air outlet holes in the vertical hole array is tilted backward and upward; the first air outlet holes in the horizontal hole array are divided into two groups, front and rear, with the hole array center as the boundary. The blowing directions of the first air outlet holes in the front and rear groups are tilted toward the hole array center and are both tilted upward. The above-mentioned layout of the first air outlet holes is conducive to forming a rotating airflow and is conducive to blowing the cut-off top into the exhaust channel.

[0014] Furthermore, a row of second air outlets is provided on the outer sides of the lower edges of the left and right side walls of the cover, and the second air outlets blow air diagonally downward. Preferably, the airflow from the second air outlets is also tilted forward, so that the airflow can act on the leaves below the top of the tobacco plant to be cut before the top of the plant enters the interior of the cover, effectively preventing the leaves below this portion from entering the cover, causing accidental cutting and disrupting the airflow.

[0015] Furthermore, guide plates are symmetrically installed on the left and right sides of the front side of the cover body, and a guide channel that gradually narrows from front to back is formed between the two guide plates. The guide plates can gather the tops of plants in a wide range into the operating range of the pneumatic cutting and recovery device.

[0016] Furthermore, a medicine applying device is mounted on the rear side of the cover. The device comprises two rollers mounted close to each other, driven by a second motor to rotate at equal speeds and in opposite directions. The surface of the rollers is a water-absorbing sponge. With this structure, the two rollers are in close contact with each other, allowing the rear side of the cover to be sealed. During use, the water-absorbing sponge is soaked with a bud inhibitor. After topping, the wound on the plant passes between the two rollers and is coated with the bud inhibitor, effectively inhibiting the subsequent growth of the terminal bud.

[0017] Furthermore, the first air outlet is formed on an air outlet component whose angle can be adjusted relative to the cover body. By adjusting the angle of the air outlet component, the emission direction of the airflow can be adjusted. In this way, the air outlet component can be adjusted as needed so that the airflow ejected from all the first air outlets can form a spiral airflow in the cover body.

[0018] Beneficial effect: In the pneumatic cutting and recovery device for tobacco topping of the present invention, when topping is carried out, the top of the tobacco crop squeezes the brush and enters the cover body, and the top entering the cover body is kept upright by the rotating airflow. The blade on the upper side of the knife shaft acts on the top of the plant first, and the blade on the lower side acts on the top of the plant later. The longer top of the tobacco crop to be cut off can be cut off section by section. The topping process is reasonable, and the crop tops cut off section by section are more easily carried by the rotating airflow and enter the discharge channel and then discharged backwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the pneumatic cutting recovery device;

[0020] Figure 2 This is a bottom-up structural diagram of a pneumatic cutting and recovery device;

[0021] Figure 3 It is a cross-sectional structural diagram of a pneumatic cutting and recovery device;

[0022] Figure 4 This is a diagram of the internal structure of the pneumatic cutting and recovery device.

[0023] In the figure: 1-cover; 11-entrance; 12-first air outlet; 13-second air outlet; 2-topping knife group; 21-knife shaft; 22-blade; 23-first motor; 3-discharge channel; 4-inlet pipe; 5-brush; 6-guide plate; 7-applicator; 71-roller; 72-second motor; a-break. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-4 The pneumatic cutting and recovery device for tobacco topping shown includes a cover body 1 with an open lower end, and a topping knife group 2 is installed in the cover body 1. The topping knife group 2 includes a vertical knife shaft 21, and the knife shaft 21 has multiple blades 22 staggered in the axial direction. The knife shaft 21 is driven by a first motor 23; the rear side of the cover body 1 has an exhaust channel 3.

[0026] The pneumatic cutting and recovery device further comprises an air inlet pipe 4, the gas entering the air inlet pipe 4 can form an oblique downward airflow, which can blow the large tobacco leaves downward to prevent the large leaves from entering the cover body 1;

[0027] The front side of the cover 1 has an entrance 11, and brushes 5 are symmetrically installed on both sides of the entrance 11. The bristles of the brushes 5 are arranged horizontally, so that there is a central, vertically extending gap a between the two brushes 5. When there is no tobacco top entering the cover 1, the gap a is in a closed state. When the top of the plant enters the cover 1, the top of the plant squeezes the brushes 5 to expand the gap a and then enter the cover 1; the inner wall of the cover 1 has a first air outlet 12 connected to the air inlet pipe 4, and the first air outlet 12 blows out an oblique upward airflow. Figure 2-3 As shown, in the direction from bottom to top, the length of the blade 22 on the knife shaft 21 gradually changes from short to long.

[0028] There are multiple first air outlets 12. These first air outlets 12 are arranged on the sidewall of the housing 1. A channel is formed in the sidewall of the housing 1 to connect the multiple first air outlets 12. The channel is connected to the air inlet pipe 4. This allows air to be discharged from all the first air outlets 12 without the need for complex piping.

[0029] In one embodiment, the first air outlet 12 is formed on the side wall of the cover body 1, that is, the air outlet direction of the first air outlet 12 remains fixed.

[0030] In the second embodiment, the first air outlet 12 is formed on an air outlet component whose angle can be adjusted relative to the cover body 1. By adjusting the angle of the air outlet component, the ejection direction of the airflow can be adjusted. In this way, the air outlet component can be adjusted as needed so that the airflow ejected from all the first air outlets 12 can form a spiral airflow in the cover body 1.

[0031] In the above structure, the brush 5, on the one hand, serves to close the entrance 11 on the front side of the cover body 1, so that the space inside the cover body 1 is open at the bottom and is surrounded by entities on all four sides. In this way, the airflow blown out of all the first air outlets 12 can form a rotating airflow inside the cover body 1, and the rotating airflow can act on the top of the tobacco, so that the top of the tobacco has a tendency to be straightened, so that the topping knife group 2 can better act on the top of the plant. On the other hand, the brush 5 serves to facilitate the entry of the top of the plant, and because the fixed end of the bristles of the brush 5 is not easily deformed, while the free end is easily deformed, the two symmetrically installed brushes 5 can serve to center the top of the plant, so that the top can be affected by the rotating airflow after entering the cover body 1. Preferably, the brush 5 is tilted backward, and in the top view direction, a V-shaped structure is formed between the two brushes 5 (such as Figure 2 This allows for better guidance of the top of the plant.

[0032] During the topping process, the top of the plant squeezes the brush 5 and enters the cover body 1. The top of the plant entering the cover body 1 is kept upright by the rotating airflow. Since the blade 22 on the upper side of the knife shaft 21 is long and the blade 22 on the lower side is short, the upper blade 22 acts on the top of the plant first, and the lower blade 22 acts on the top of the plant later. In this way, the top can be gradually cut off from top to bottom, realizing the segmented cutting of the longer (generally 20-30 cm) top of the tobacco crop to be cut off. The topping process is reasonable, and the crop top cut off in sections is more easily caught by the rotating airflow and enters the discharge channel 3 and is discharged backwards.

[0033] Preferably, the first air outlet 12 is arranged on the left and right side walls of the cover body 1, such as Figure 3As shown, each side wall has an L-shaped vertical hole array and a horizontal hole array (both the vertical hole array and the horizontal hole array are composed of first air outlet holes 12 arranged in a linear array), the vertical hole array is close to the inlet portion 11, and the horizontal hole array is close to the lower edge of the side wall. The airflow blown out of the first air outlet holes 12 in the vertical hole array is tilted backward and upward; the first air outlet holes 12 in the horizontal hole array are divided into two groups, front and rear, with the hole array center as the boundary. The blowing directions of the front and rear groups of first air outlet holes 12 are tilted toward the hole array center, and both are tilted upward. The layout of the above-mentioned first air outlet holes 12 is conducive to the formation of rotating airflow and is conducive to blowing the cut-off top to the exhaust channel 3. Correspondingly, there are two air inlet pipes 4, which are used to supply air to the first air outlet holes 12 and the second air outlet holes 13 on the left and right side walls respectively.

[0034] Preferably, a row of second air outlet holes 13 are provided on the outer sides of the lower edges of the left and right side walls of the cover 1. The second air outlet holes 13 blow air diagonally downward. Preferably, the airflow from the second air outlet holes 13 is also tilted forward. This allows the airflow to reach the leaves below the top of the tobacco plant to be cut before the top of the plant enters the interior of the cover 1, effectively preventing the leaves below this portion from entering the cover 1 and causing miscutting and disrupting the airflow.

[0035] Preferably, guide plates 6 are symmetrically installed on the left and right sides of the front side of the cover body 1, and a guide channel that gradually narrows from front to back is formed between the two guide plates 6. The guide plates 6 can gather the tops of plants in a wide range into the operating range of the pneumatic cutting and recovery device.

[0036] Preferably, a medicine applying device 7 is mounted on the rear side of the cover 1. The medicine applying device 7 comprises two rollers 71 mounted close to each other. The rollers 71 are driven by a second motor 72 to rotate at equal speeds and in opposite directions. The surface of the rollers 71 is a water-absorbing sponge. With this structure, the two rollers 71 are in close contact with each other, allowing the rear side of the cover 1 to be sealed. During use, the water-absorbing sponge is soaked with a bud inhibitor. After the plant top is toppled, the plant wound passes between the two rollers 71 and is coated with the bud inhibitor, which can effectively inhibit the growth of the terminal bud.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pneumatic cutting and recovery device for tobacco topping, comprising a cover (1) with an open lower end, a topping knife group (2) installed in the cover (1), the topping knife group (2) comprising a vertical knife shaft (21), a plurality of blades (22) staggered in the axial direction on the knife shaft (21), the knife shaft (21) being driven by a first motor (23); a discharge channel (3) is provided on the rear side of the cover (1); It also includes an air intake pipe (4), and the gas entering the air intake pipe (4) can form an oblique downward airflow; Its characteristics are: The front side of the cover (1) has an entrance (11), and brushes (5) are symmetrically installed on both sides of the entrance (11); the bristles of the brushes (5) are arranged horizontally, so that there is a central, vertically extending fracture (a) between the two brushes (5); when no tobacco top enters the cover (1), the fracture (a) is in a closed state; when the top of the plant enters the cover (1), the top of the plant squeezes the brushes (5) to expand the fracture (a) and then enters the cover (1); The inner wall of the cover body (1) is provided with a first air outlet (12) connected to the air inlet pipe (4), and the first air outlet (12) blows out an obliquely upward airflow; the airflow blown out by all the first air outlets (12) can form a rotating airflow within the cover body (1), and the rotating airflow can act on the top of the tobacco, so that the top of the tobacco has a tendency to be straightened; In the direction from bottom to top, the length of the blade (22) on the knife shaft (21) gradually increases from short to long.

2. The pneumatic cutting and recovery device for tobacco topping according to claim 1, characterized in that: The first air outlet holes (12) are arranged on the side wall of the cover body (1), and a channel connecting the plurality of the first air outlet holes (12) is formed in the side wall of the cover body (1), and the channel is connected to the air inlet pipe (4).

3. The pneumatic cutting and recovery device for tobacco topping according to claim 2, characterized in that: The first air outlet holes (12) are arranged on the left and right side walls of the cover body (1), and each side wall has a vertical hole array and a horizontal hole array arranged in an L-shaped manner, the vertical hole array is close to the inlet portion (11), and the horizontal hole array is close to the lower edge of the side wall.

4. The pneumatic cutting and recovery device for tobacco topping according to claim 1, characterized in that: A row of second air outlet holes (13) is provided on the outer sides of the lower edges of the left and right side walls of the cover body (1), and the second air outlet holes (13) blow out obliquely downward airflow.

5. The pneumatic cutting and recovery device for tobacco topping according to claim 1, characterized in that: Guide plates (6) extending forward are symmetrically mounted on the left and right sides of the front side of the cover body (1), and a guide channel gradually narrowing from front to back is formed between the two guide plates (6).

6. The pneumatic cutting and recovery device for tobacco topping according to claim 1, characterized in that: A medicine applying device (7) is installed on the rear side of the cover body (1). The medicine applying device (7) comprises two rollers (71). The rollers (71) are driven to rotate by a second motor (72); the surface of the rollers (71) is a water-absorbing sponge.

7. The pneumatic cutting and recovery device for tobacco topping according to claim 1, characterized in that: The first air outlet (12) is formed on an air outlet component capable of adjusting an angle relative to the cover body (1).

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