阅读说明：本技术 一种土壤中秸秆粉碎种植一体化系统 (Straw smashing and planting integrated system in soil ) 是由 孟维伟 么传训 周莉 谢容芳 林松明 南镇武 刘灵艳 于 2021-07-26 设计创作，主要内容包括：本公开提供一种土壤中秸秆粉碎种植一体化系统,涉及播种设备领域,包括粉碎装置、播种装置和导引机构,粉碎装置包括机架、拾取机构和旋耕机构,拾取机构包括拾取刺辊、收集筒和风机,收集筒为侧壁开口的局部圆筒结构,一端通过风机连通导引机构,收集筒开口位置沿圆周方向设有凹槽,拾取刺辊转动安装在机架上,拾取刺辊的外圆周面上设有沿径向分布的拾取针,拾取针用于在拾取刺辊转动下刺入土壤内拾取秸秆并配合凹槽将秸秆投入收集筒内；导引机构将收集筒内的秸秆输送至播种装置工作后的已播种区域；通过设置转动刺辊配合收集筒进行秸秆还田区域浅层土体的秸秆拾取清理,减少浅层土体内的秸秆残留,避免了秸秆碎片影响种子萌发、生长的问题。(The utility model provides an integrated system for smashing and planting straws in soil, which relates to the field of seeding equipment and comprises a smashing device, a seeding device and a guide mechanism, wherein the smashing device comprises a rack, a picking mechanism and a rotary tillage mechanism, the picking mechanism comprises a picking licker-in, a collecting cylinder and a fan, the collecting cylinder is a local cylinder structure with an opening on the side wall, one end of the collecting cylinder is communicated with the guide mechanism through the fan, a groove is arranged at the opening position of the collecting cylinder along the circumferential direction, the picking licker-in is rotationally arranged on the rack, picking needles distributed along the radial direction are arranged on the outer circumferential surface of the picking licker-in and are used for pricking in the soil to pick up the straws under the rotation of the picking licker-in and putting the straws into the collecting cylinder by matching with the groove; the guide mechanism conveys the straws in the collecting cylinder to a sowed area after the sowing device works; the rotating licker-in is matched with the collecting barrel to pick up and clean the straws of the shallow soil body in the straw returning area, so that the residues of the straws in the shallow soil body are reduced, and the problem that the straw fragments influence the germination and growth of seeds is avoided.)

1. The integrated system for smashing and planting the straws in the soil is characterized by comprising a smashing device, a seeding device and a guiding mechanism, wherein the smashing device comprises a rack, a picking mechanism and a rotary tillage mechanism, the picking mechanism, the rotary tillage mechanism and the seeding device are installed on the rack at intervals, the picking mechanism comprises a picking spike roller, a collecting cylinder and a fan, the collecting cylinder is of a local cylinder structure with an opening on the side wall, one end of the collecting cylinder is communicated with the guiding mechanism through the fan, a groove is formed in the opening position of the collecting cylinder along the circumferential direction, a plurality of grooves form a comb-tooth-shaped structure along the axial direction of the collecting cylinder, the picking spike roller is rotatably installed on the rack, picking needles distributed along the radial direction are arranged on the outer circumferential surface of the picking spike roller, and the picking needles are used for piercing into the soil to pick up the straws under the rotation of the picking spike roller and are matched with the groove to put the straws into the collecting cylinder; the guide mechanism is used for conveying the straws in the collecting cylinder to a sowed area after the sowing device works.

2. The integrated system for crushing and planting straw in soil as claimed in claim 1, wherein the picking mechanism and the rotary tillage mechanism are respectively matched with corresponding transmission mechanisms, the transmission mechanisms are connected with a speed reducer, and the speed reducer is used for being connected with a PTO of external traction equipment.

3. The integrated system for crushing and planting straw in soil as claimed in claim 1, wherein a plurality of groups of picking needles are circumferentially arranged on the picking licker-in, each group comprising a plurality of picking needles sequentially distributed at intervals along the axial direction of the picking licker-in; along picking up licker-in axial, all picking up needles of every group picking up needle and the recess one-to-one cooperation of collecting vessel, can drop the straw that carries on it to the collecting vessel when picking up the needle and sliding for the recess in.

4. The integrated soil straw crushing and planting system as claimed in claim 3, wherein the axis of the picking needle is an arc line, and the track of the axis of the picking needle is matched with the track of the groove, so that the picking needle can contact the groove from the root to the tip in sequence.

5. The integrated system for crushing and planting straw in soil as claimed in claim 1, wherein the circumferential side wall of the collecting barrel is provided with a feeding hole penetrating through the end part of the collecting barrel along the axial direction, and the picking needle can enter the collecting barrel through the feeding hole and leave the collecting barrel through the groove.

6. The integrated system for crushing and planting straw in soil as claimed in claim 1, wherein a vent hole is arranged between adjacent grooves on the side wall of the collecting cylinder, the vent hole is communicated with an external air source through an internal channel of the collecting cylinder, and the vent hole is used for taking air flow from the outside and outputting the air flow towards the axis of the collecting cylinder.

7. The integrated system for smashing and planting straw in soil as claimed in claim 6, wherein the collecting cylinder is connected with the frame through a vent pipe, one end of the vent pipe is communicated with the inner channel of the collecting cylinder, and the other end of the vent pipe is communicated with an external air source.

8. The integrated system for smashing and planting straw in soil as claimed in claim 1, wherein a housing is mounted on the frame, the housing covers the smashing device, and connecting blocks are arranged on the frame and used for being respectively connected with an external traction device and a seeding device.

9. The integrated system for smashing and planting straw in soil as claimed in claim 1, wherein the guiding mechanism comprises a guiding air pipe and a guiding fan, the guiding fan is installed in the guiding air pipe, one end of the guiding air pipe is in butt joint communication with one end of the collecting barrel fan, and the other end of the guiding air pipe extends to the rear of the seeding device.

10. The integrated system for pulverizing and planting straw in soil as claimed in claim 9, wherein said guiding air duct comprises a main duct and a branch duct, the main duct is connected to the collecting barrel, one end of the branch duct is connected to the main duct and forms an angle with the main duct, and a guiding fan is installed in the branch duct for inputting air flow into the main duct.

Technical Field

The utility model relates to a seeding equipment field, in particular to integrated system is smashed to straw in soil and plants.

Background

For the regions with middle and high latitudes, the fields are usually cultivated by adopting a crop rotation mode, wheat needs to be sown in time after harvesting previous crops such as corn, rice and cotton, the crops such as corn need to be sown in time after harvesting wheat, and the straws are usually left in the fields after harvesting along with the promotion of mechanized harvesting, particularly for the harvested corn straws, the corn straws are usually treated by adopting a straw crushing and returning mode along with the improvement of the environmental protection requirement, and then the roots, the stems and the blades of the corn straws are intensively crushed by adopting a thin-layer rotary tillage mode.

Although the volume of the straw is effectively reduced after the straw is returned to the field by rotary tillage, the whole straw can be kept in soil as nutrient; however, in the rotary tillage process, partial straws cannot be deeply buried and are in the shallow layer and surface area of the soil body, and the fine seeding of wheat in the state is difficult to meet the requirement; on one hand, the straws are not crushed thoroughly, and the residual straws cause ditching and grass hanging of the seeder; on the other hand, the straws stay in the shallow region of the soil body and are close to the wheat seed region during sowing, so that the wheat root system cannot effectively land, the root system is unstable, and the planting effect of a fine sowing region is influenced; on the other hand, for the fine-ploughing and fine-planting area, the residual worm eggs and pathological changes of the straws of the previous crops are close to the seeds, and the growth of the seeds is interfered to cause the pathological changes.

Disclosure of Invention

The utility model aims at the defect that prior art exists, provide a planting integration system is smashed to straw in soil, rotate licker-in cooperation collecting cylinder through setting up and carry out the straw of the regional shallow soil body of straw returning and pick up the clearance, reduce the straw in the shallow soil body and remain to lay the straw of picking up behind the cultivation region, avoided the straw piece to influence the problem that the seed germinates, grows promptly, make full use of again the straw after returning the field.

In order to realize the purpose, the following technical scheme is adopted:

a straw smashing and planting integrated system in soil comprises a smashing device, a seeding device and a guiding mechanism, wherein the smashing device comprises a rack, a picking mechanism and a rotary tillage mechanism, the picking mechanism, the rotary tillage mechanism and the seeding device are installed on the rack at intervals, the picking mechanism comprises a picking spike roller, a collecting cylinder and a fan, the collecting cylinder is of a local cylinder structure with an opening on the side wall, one end of the collecting cylinder is communicated with the guiding mechanism through the fan, a groove is formed in the opening position of the collecting cylinder along the circumferential direction, a plurality of grooves form a comb-tooth-shaped structure along the axial direction of the collecting cylinder, the picking spike roller is rotatably installed on the rack, picking needles distributed along the radial direction are arranged on the outer circumferential surface of the picking spike roller, and the picking needles are used for puncturing soil to pick up straws under the rotation of the picking spike roller and are matched with the grooves to put the straws into the collecting cylinder; the guide mechanism is used for conveying the straws in the collecting cylinder to a sowed area after the sowing device works.

Furthermore, the picking mechanism and the rotary tillage mechanism are respectively matched with corresponding transmission mechanisms, the transmission mechanisms are connected with a speed reducer, and the speed reducer is used for being connected with a PTO of external traction equipment.

Furthermore, a plurality of groups of picking needles are arranged on the picking licker-in along the annular direction, and each group comprises a plurality of picking needles which are sequentially distributed at intervals along the axial direction of the picking licker-in; along picking up licker-in axial, all picking up needles of every group picking up needle and the recess one-to-one cooperation of collecting vessel, can drop the straw that carries on it to the collecting vessel when picking up the needle and sliding for the recess in.

Further, the picking needle axis is an arc line, and the axis track of the picking needle is matched with the track of the groove, so that the picking needle can contact the groove from the root to the tip in sequence.

Furthermore, a feeding hole penetrating through the end part of the collecting cylinder is axially formed in the circumferential side wall of the collecting cylinder, and the pickup needle can penetrate through the feeding hole, enter the collecting cylinder and penetrate through the groove to leave the collecting cylinder.

Further, a vent hole is formed between adjacent grooves in the side wall of the collecting barrel and is communicated with an external air source through an internal channel of the collecting barrel, and the vent hole is used for obtaining air flow from the outside and outputting the air flow towards the axis of the collecting barrel.

Furthermore, the collecting cylinder is connected with the rack through a vent pipe, one end of the vent pipe is communicated with the inner channel of the collecting cylinder, and the other end of the vent pipe is communicated with an external air source.

Furthermore, a shell is installed on the rack, the shell covers the crushing device in a buckling mode, and connecting blocks are arranged on the rack and used for being respectively in butt joint with external traction equipment and a seeding device.

Furthermore, the guiding mechanism comprises a guiding air pipe and a guiding fan, the guiding fan is installed in the guiding air pipe, one end of the guiding air pipe is in butt joint with one end of the collecting cylinder fan, and the other end of the guiding air pipe extends to the rear of the seeding device.

Further, the guide air pipe comprises a main pipe and a branch pipe, the main pipe is communicated with the collecting barrel, one end of the branch pipe is communicated with the main pipe and forms an included angle with the main pipe, and the guide fan is installed in the branch pipe and used for inputting air flow into the main pipe.

Compared with the prior art, the utility model has the advantages and positive effects that:

(1) the straw that carries out the regional shallow soil body of straw returning field is picked up the clearance through setting up the cooperation of rotating licker-in and collecting cylinder, reduces the straw in the shallow soil body and remains to lay the straw of picking up behind the cultivation region, avoided the straw piece to influence the problem that the seed germinates, grows promptly, make full use of again the straw after returning the field.

(2) Adopt local drum structure, side open position supplies to carry in the needle of picking up that carries the straw piece gets into the surge drum, groove structure can cooperate the needle of picking up to stop to make the straw piece that carries on it and take off to drop to in the surge drum, take out the straw in the surge drum outside the surge drum under fan negative pressure air current effect, thereby spray the seeding through guide mechanism and accomplish the region, the processing after the straw piece picks up in the realization is to the shallow soil body, pick up and the treatment effeciency has been improved.

(3) Adopt the needle structure of picking up of multiunit densely covered, can pierce the shallow soil body after preliminary rotary tillage in, fix the straw in the shallow soil body on picking up the needle, compare in all collecting the top layer soil body and filter, can improve the collection of straw and pick up efficiency, reduce operation.

(4) The densely distributed pickup needles are of an arc-shaped structure, and can be matched with the grooves to gradually push the straws from the bottom to the tip of the pickup needle to be taken down after the straws are collected by penetrating into the surface soil body, so that the residues of the straws on the pickup needles are avoided, the cleaning capability of the pickup needles is improved, and the effect of the pickup needles on puncturing and picking up in the shallow soil body is ensured; pick up needle and groove structure and for holding the structure of cooperation each other, to some straw that the volume is great, picked up by a plurality of pjncture needles, during the broach shape structure that the process groove formed, can cut under the common staggered effect of recess, pick-up needle, form effectual crushing effect.

(5) Arranging air holes and channels in the collecting cylinder, outputting airflow to an area where the straws are stored in the collecting cylinder, lifting the straws, and matching with a fan at one end to ensure the effective output of the straws; for large-volume straws positioned in the collecting cylinder, the air flow is difficult to disturb the position of the large-volume straws, and the large-volume straws enter the collecting cylinder in a continuously staggered mode and pass through the picking needles of the grooves, so that a cutting structure is formed, the large-volume straws are cut off, and the volume of the straws is reduced, so that the straws are conveniently output from one end of the collecting cylinder.

(6) The crushing mechanism further comprises a rotary tillage mechanism, and the shallow soil body after the straw fragments are picked up is leveled and loosened again through the action of the rotary tillage mechanism, so that the seeding of a rear seeding device is facilitated, and the seeding quality is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.

FIG. 1 is an overall schematic view of an integrated system for crushing and planting straws in soil according to embodiment 1 of the disclosure;

fig. 2 is an external structural view of a crushing apparatus in embodiment 1 of the present disclosure;

fig. 3 is a schematic view of the internal structure of a crushing apparatus in embodiment 1 of the present disclosure;

fig. 4 is a schematic structural view of a crushing device matched with a guide mechanism in embodiment 1 of the disclosure;

fig. 5 is a schematic cross-sectional view of a crushing apparatus in embodiment 1 of the present disclosure;

fig. 6 is a schematic structural view of a pick-up licker-in cooperating with a collecting cylinder in embodiment 1 of the present disclosure.

In the figure, 1-a crushing device, 2-a sowing device, 3-a guiding mechanism, 4-a frame, 5-a picking mechanism, 6-a rotary tillage mechanism, 7-a picking licker-in, 8-a collecting cylinder, 9-a fan, 10-a groove, 11-a picking needle, 12-a transmission mechanism, 13-a reducer, 14-a feeding hole, 15-an air hole, 16-an internal channel, 17-an air pipe, 18-a shell,

19-connecting block, 20-guiding air pipe, 21-branch pipe and 22-guiding fan.

Detailed Description

Example 1

In an exemplary embodiment of the present disclosure, as shown in fig. 1 to 6, an integrated system for crushing and planting straws in soil is provided.

The straw crushing and sowing device mainly comprises a crushing device 1, a sowing device 2 and a guide mechanism 3, wherein the crushing device and the guide mechanism are used as core components in the embodiment, and the processes of straw picking, collecting, crushing and secondary straw laying are carried out on the land after straw returning to the field. The seeding device is positioned between the crushing device and the output end of the guide mechanism and is used for seeding the shallow land after the straws are picked up, and the seeded area is covered by the straws output by the guide mechanism.

When the seeding device is used for seeding, the straws in the front shallow layer soil are picked up and removed, so that the problems that the straws in the shallow layer soil in the straw returning area are not thoroughly crushed, and the residual straws cause blockage and silting caused by hooking the straws by an element provided with a planting ditch in the seeding process are solved. In addition, the shallow land after the straws are removed can provide a good living environment for the seeds, the problem that the roots cannot effectively land when the straws are close to the seeds in the shallow land and the seeds germinate and grow is solved, the root system stability of the sowed crops is improved, and the planting effect of a fine sowing area is improved.

It can be understood that, in this embodiment, the sowing device provides the sowing function for the whole system, the specific structure of which is not limited, and the purpose of fine sowing on the soft soil body after picking up the straw can be achieved by selecting the existing commercial sowing equipment.

The crushing device is mainly divided into two functional parts, one part is a picking mechanism 5, the other part is a rotary tillage mechanism 6, and the two functional parts are respectively arranged on a main body frame 4 of the crushing device at intervals.

The rotary tillage mechanism comprises a rotary tillage roller and rotary tillage blades connected with the outer part of the rotary tillage roller, so that a soil body can be crushed and rotary tilled, the hardening of the soil body is reduced, and the soil body can be softer and smoother; in the advancing direction, the rotary tillage mechanism is located behind the picking mechanism and between the picking mechanism and the seeding device, and carries out rotary tillage leveling on the soil body after the straw is picked up, so that a good seeding environment is provided for the subsequent seeding device.

For the picking mechanism, the picking mechanism comprises a picking licker-in 7 and a collecting cylinder 8 which are matched, the collecting cylinder is of a local cylinder structure with an opening on the side wall, one end of the collecting cylinder is communicated with the guiding mechanism through a fan 9, a groove 10 is arranged at the opening position of the collecting cylinder along the circumferential direction, and a plurality of grooves form a comb-shaped structure along the axial direction of the collecting cylinder.

Can cooperate through the comb profile of tooth structure and pick up licker-in, will pick up to pierce on the licker-in and collude under the straw that hangs passes through recess "comb" to drop in the collecting vessel, under the air current effect that one end fan produced, input gradually in the guide mechanism, and then sow regional rear after guide mechanism discharges, cover the region after the seeding.

The picking-up licker-in is rotatably arranged on the rack, the picking-up needles 11 distributed along the radial direction are arranged on the outer circumferential surface of the picking-up licker-in and are used for being penetrated into soil to pick up straws under the rotation of the picking-up licker-in and being matched with the grooves to put the straws into the collecting cylinder.

Specifically, referring to fig. 1 and 2, the rotary tillage mechanism and the pick-up licker-in are both shaft-shaped rotation mechanisms, and are respectively matched with corresponding transmission mechanisms 12, the transmission mechanisms are connected with a speed reducer 13, and the speed reducer is connected to a PTO of external traction equipment through a universal joint. The torque output by PTO of external traction equipment such as a tractor and the like drives the picking licker-in and the rotary tillage mechanism to work, so that the straw picking and rotary tillage functions are realized.

It can be understood that the transmission mechanism can be a belt pulley transmission, a chain transmission, a gear transmission, a shaft transmission, etc., in this embodiment, in order to take transmission efficiency and work safety into consideration, a belt pulley transmission and gear shaft transmission mode as shown in fig. 2 and fig. 3 is adopted, so as to ensure work stability.

Adopt local drum structure, side open position supplies to carry in the needle of picking up that carries the straw piece gets into the surge drum, groove structure can cooperate the needle of picking up to stop to make the straw piece that carries on it and take off to drop to in the surge drum, take out the straw in the surge drum outside the surge drum under fan negative pressure air current effect, thereby spray the seeding through guide mechanism and accomplish the region, the processing after the straw piece picks up in the realization is to the shallow soil body, pick up and the treatment effeciency has been improved.

Further, the mutual matching relation of the picking-up licker-in, the collecting cylinder and the fan is detailed, and with reference to fig. 3, 5 and 6, in order to improve the overall picking-up efficiency, a plurality of groups of picking-up needles are circumferentially arranged on the picking-up licker-in, and each group of picking-up needles comprises a plurality of picking-up needles which are sequentially distributed at intervals along the axial direction of the picking-up licker-in;

the multiple groups of pick-up needles work in turn and circularly pick up, crush and remove, so that the continuity of work is improved.

In this embodiment, four sets of pick-up needles are employed, each set comprising twenty; of course, in other embodiments, other specifications can be selected and determined according to the size of the straw fragments in the land.

When the straw fragments are large, the number of each group of picking needles can be properly reduced, the distance between every two adjacent picking needles is increased, and the overall running resistance is reduced on the basis of meeting the picking capability of the picking needles in the land.

Along picking up licker-in axial, all picking up needles of every group picking up needle and the recess one-to-one cooperation of collecting vessel, can drop the straw that carries on it to the collecting vessel when picking up the needle and sliding for the recess in.

Adopt the needle structure of picking up of multiunit densely covered, can pierce the shallow soil body after preliminary rotary tillage in, fix the straw in the shallow soil body on picking up the needle, compare in all collecting the top layer soil body and filter, can improve the collection of straw and pick up efficiency, reduce operation.

In the process that the picking needle rotates around the axis of the picking licker-in, in order to guarantee the picking effect, the structure of the picking needle is specially configured, the axis of the picking needle is an arc line, and the axis track of the picking needle is matched with the track of the groove, so that the picking needle can sequentially contact the groove from the root to the tip.

Furthermore, when the tip of the picking needle contacts the ground, the included angle between the tip of the picking needle and the ground is within the range of 45-135 degrees, so that the picking needle can be guaranteed to penetrate into the ground, straws in the ground can be stably pricked, and the picking needle is hooked and carried by using the radian of the picking needle, so that the straws can enter the cylinder.

The densely distributed pick-up needles are of arc-shaped structures, and can be matched with the grooves to gradually push the straws to take down from the bottom of the pick-up needle to the tip end after the straws are collected by penetrating into the surface soil body, so that the residues of the straws on the pick-up needles are avoided, the cleaning capacity of the pick-up needles is improved, and the pick-up effect of the straws on the puncture in the shallow soil body is ensured.

In order to ensure that the straws carried by the pickup needle can effectively enter the collecting cylinder, in the embodiment, the circumferential side wall of the collecting cylinder is provided with a feeding hole 14 penetrating through the end part of the collecting cylinder along the axial direction, and the pickup needle can penetrate through the feeding hole to enter the collecting cylinder and penetrate through the groove to leave the collecting cylinder.

The broach structure that a plurality of grooves formed, pick up the needle and hold the cooperation with groove structure each other, to some bulky, the straw of being picked up by a plurality of pjncture needles, during the broach shape structure that the process groove formed, can cut under the common staggered effect of recess, pick up the needle, form effectual crushing effect.

The crushed small-volume straws are left at the bottom of the collecting cylinder, and although the straw is crushed and reduced in volume under the action of the pick-up needle, the straws are left at the bottom of the collecting cylinder and are inconvenient to discharge; thus, there are vents 15 between adjacent grooves in the side walls of the collecting vessel, which vents communicate with an external air supply via an internal passage 16 of the collecting vessel, for taking in air from the outside and outputting it towards the axis of the collecting vessel.

Air holes and channels are arranged in the collecting cylinder, air flow is output to an area where straws are stored in the collecting cylinder, the straws are stirred, and the straws are effectively output to the outside of the collecting cylinder and enter the guide mechanism by matching with axial air flow generated by a fan at one end.

For large-volume straws positioned in the collecting cylinder, the air flow is difficult to disturb the position of the large-volume straws, and the large-volume straws enter the collecting cylinder in a continuously staggered mode and pass through the picking needles of the grooves, so that a cutting structure is formed, the large-volume straws are cut off, and the volume of the straws is reduced, so that the straws are conveniently output from one end of the collecting cylinder.

The collecting cylinder and the frame can be connected by a vent pipe 17, one end of the vent pipe is communicated with the inner channel of the collecting cylinder, and the other end of the vent pipe is communicated with an external air source; thereby make the breather pipe regard as trachea communicating structure promptly, can regard as the connecting piece again for the surge drum can stably arrange in the frame.

It can be understood that the other end of the collecting cylinder far away from the fan can also be provided with an opening penetrating through the frame shell, and a filter screen structure is arranged, so that the isolation of the external environment is realized, and the running resistance of the fan is reduced;

similarly, an auxiliary fan can be added in the filter screen to draw air flow from the outside and input the air flow into the collecting cylinder, and the auxiliary fan discharges straws in the collecting cylinder.

Install casing 18 in the frame, the casing is detained and is covered in the reducing mechanism outside, is equipped with connecting block 19 in the frame for dock outside traction apparatus, seeder respectively, the casing can also play the guard action.

In order to avoid the interference of soil raised by the rotary tillage mechanism on the picking mechanism, a baffle plate can be arranged between the picking mechanism and the rotary tillage mechanism to isolate the working areas of the picking mechanism and the rotary tillage mechanism.

And the guiding mechanism comprises a guiding air pipe 20 and a guiding fan 22, one end of the guiding air pipe is in butt joint with one end of the collecting barrel fan, and the other end of the guiding air pipe extends to the rear of the seeding device.

The guide air duct comprises a main duct and a branch duct 21, the main duct is communicated with the collecting barrel, one end of the branch duct is communicated with the main duct and forms an included angle with the main duct, and the guide fan is installed in the branch duct and used for inputting air flow into the main duct.

Arrange the guide fan in the branch pipe, can avoid the direct contact of guide fan and straw piece, avoid the straw to block up in the piling up of guide fan position, utilize the negative pressure effect that the branch pipe air current produced, will send out the straw in the collecting vessel and extract the back and discharge.

It will be appreciated that in order to improve the overall extraction capacity, a plurality of manifolds may be provided, and a plurality of guiding fans may be provided, preferably with the axes of the manifolds at which the guiding fans are located being at an angle of 45 ° to the axis of the main duct at the corresponding location.

The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.