CN112042292A

CN112042292A - Wheat wide-width uniform sowing device with controllable sowing depth

Info

Publication number: CN112042292A
Application number: CN202010882486.1A
Authority: CN
Inventors: 吴峰; 于向涛; 顾峰玮; 陈有庆; 徐弘博; 胡志超; 谢焕雄; 吴惠昌; 张延化
Original assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Current assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2020-12-08

Abstract

The invention relates to a wheat wide-width uniform sowing device with controllable sowing depth, belonging to the technical field of agricultural machinery.A pair of suspension brackets is fixedly arranged on a rack, a sowing support cross frame is arranged between the two suspension brackets, and the two suspension brackets are respectively connected with the left end and the right end of the sowing support cross frame in a suspension way through a lifting adjusting assembly; a plurality of seeding tube groups which are arranged at equal intervals along the length direction of the seeding support cross frame are arranged on the seeding support cross frame, and the front seeding tube and the rear seeding tube of each seeding tube group are arranged in a staggered manner; each seeding pipe comprises: the vertical part, the arc part and the arc steel plate, wherein the arc part is bent backwards, and the arc steel plate is welded on the lower side of the inner wall of the arc part in the middle when seen in the cross section direction of the arc part; the bottom end of the arc steel plate corresponds to the bottom end of the arc part and is provided with a tail end tilting part extending out of the bottom end of the arc part, and the tail end tilting part is warped upwards relative to the arc steel plate main body. The device obviously improves technical indexes such as seeding depth consistency, seeding uniformity, different soil adaptability and the like.

Description

Wheat wide-width uniform sowing device with controllable sowing depth

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a wheat wide-width uniform sowing device.

Background

The amount of crop straws generated in China every year is about 10 hundred million tons, which accounts for nearly 20 percent of the total amount of the whole world, and the technology, the ecology and the social problems which need to be solved urgently are that the straws are not burnt and the economic and effective resource utilization is carried out. At present, the 'full straw hard stubble land' with the harvested previous crops such as rice without any collection and removal treatment of straws becomes a new normal state for cultivation in China.

The applicant discloses an invention patent of a straw crushing row space centralized covering no-tillage planter, and the application number is 2018108613806. The seeder mainly comprises a frame, a straw smashing and cleaning device (comprising a straw smashing and guiding device), a fertilizing device, a wheat wide-width uniform sowing device, a power transmission device and the like. However, the wheat wide-width uniform sowing device disclosed in the prior art needs to be improved in the aspects of controllable sowing depth and sowing uniformity.

Disclosure of Invention

The invention aims to provide a wheat wide-width uniform sowing device with controllable sowing depth, which obviously improves technical indexes such as sowing depth consistency, sowing uniformity, different soil adaptability and the like.

The purpose of the invention is realized as follows: a wheat wide-width uniform sowing device with controllable sowing depth comprises a rack, a hopper box, a plurality of sowing pipes and a seed conveying component, wherein the hopper box is installed on the rack and used for containing seeds, the sowing pipes are fixedly arranged on the rack and are vertically communicated, the seed conveying component is used for conveying the seeds in the hopper box to all the sowing pipes, a pair of suspension brackets which are symmetrically distributed on the left and right sides are fixedly installed on the rack, a horizontally extending sowing support cross frame is arranged between the two suspension brackets, the length direction of the sowing support cross frame is perpendicular to the advancing direction of an agricultural machine, the two suspension brackets are respectively provided with a lifting adjusting component, and the two suspension brackets are respectively connected with the left end and the right end of the sowing support cross frame in a hanging manner through the lifting adjusting;

a plurality of seeding pipe groups which are arranged at equal intervals along the length direction of the seeding support cross frame are arranged on the seeding support cross frame, each seeding pipe group comprises a plurality of seeding pipes, the seeding pipes of each seeding pipe group are divided into a front row and a rear row, the front row of each seeding pipe group is at least provided with one front seeding pipe, the rear row of each seeding pipe group is at least provided with two rear seeding pipes, and the front seeding pipes and the rear seeding pipes are arranged in a staggered mode;

each seeding pipe comprises:

the upper end of the vertical part of the vertical pipe structure is communicated with the discharge end of the seed conveying part;

the arc part of the arc tube structure is bent backwards, the uppermost end of the arc part is communicated with the lower end of the vertical part, and the lowermost end of the arc part is obliquely opposite to and close to the ground;

the arc steel plate is used for scattering seeds, the arc steel plate extends along the arc length direction of the lower side of the inner wall of the arc part, the section of the arc steel plate is of an upwardly arched arc structure, and the arc steel plate is welded on the lower side of the inner wall of the arc part in the middle when seen in the section direction of the arc part;

the bottom end of the arc steel plate corresponds to the bottom end of the arc part and is provided with a tail end tilting part extending out of the bottom end of the arc part, and the tail end tilting part is warped upwards relative to the arc steel plate main body.

Further, the tail end tilting part is tilted upwards by 10-20 degrees relative to the arc steel plate main body.

Further, the length of the lowest end of the protruding arc part of the tail end tilting part is 5-10 mm.

Furthermore, each set of seeding pipe group is provided with a rear pipe mounting frame arranged on the seeding support cross frame, and the rear seeding pipe of each set of seeding pipe group is fixedly arranged on the rear pipe mounting frame.

Further, the rear pipe mounting frame is adjustably mounted on the sowing support cross frame front and rear.

Further, the lifting adjusting assembly comprises a vertically arranged lifting adjusting screw rod, the lifting adjusting screw rod penetrates through the suspension support and the seeding support cross frame simultaneously, two sets of locking nuts are sleeved on the lifting adjusting screw rod, the lifting adjusting screw rod is locked on the suspension support by one set of locking nuts, and the lifting adjusting screw rod is locked on the seeding support cross frame by the other set of locking nuts.

Furthermore, a front and rear distance adjusting hole which is communicated up and down and has a long round hole structure is formed in the suspension bracket, the length direction of the front and rear distance adjusting hole is parallel to the advancing direction of the agricultural machine, and the lifting adjusting screw penetrates through the front and rear distance adjusting hole.

Further, the position of frame after being in the seeding support crossbearer is equipped with the compression roller group that is arranged in the soil of impressing the seed that falls to the ground, compression roller group has a roller, the roller supports the crossbearer with the seeding and parallels, the roller both ends are rotated and are connected the frame and use its axis as accurate rotation when agricultural machinery gos forward, the coaxial a plurality of compression rollers that are provided with on the roller, the periphery wall of compression roller when using with ground roll contact, all compression rollers along the equidistant arrangement of roller axial, the quantity of compression roller equals with the cover number of seeding nest of tubes, the compression roller is in the positive rear of seeding nest of tubes, and just one-to-one.

Furthermore, the seed conveying part comprises a motor, a plurality of seed metering devices arranged at the bottom of the wheat bucket box and a plurality of groups of conveying pipes;

the number of the seeding devices is equal to that of the seeding pipes and corresponds to that of the seeding pipes one by one, all the seeding devices are horizontally arranged into a row, the arrangement direction of the seeding devices is parallel to that of the seeding pipe groups, and an output main shaft of the motor is in transmission fit with all the seeding devices so as to drive the seeding devices to convey seeds into the conveying pipes;

the number of the groups of the conveying pipes is equal to the number of the seeding pipes, and each seeding device is downwards communicated with one corresponding seeding pipe through one group of conveying pipes.

The invention has the beneficial effects that:

1. the device can realize uniform seeding of seeds in a set width (such as 240mm) area and realize good earthing effect, the seeding pipes in the device are divided into a front group and a rear group, the front group is a front seeding pipe, the rear group is a rear seeding pipe, and the front seeding pipe and the rear seeding pipe are arranged in a staggered way, so that blockage is effectively prevented, and enough space is reserved to enable soil to cross the seeding pipes;

2. the adjustable sowing depth of seeds can be realized while wide-width sowing is realized, and the sowing support cross frame can be driven to be adjusted up and down along the lifting adjusting screw rod due to the arrangement of the lifting adjusting screw rod and the locking nut, so that the distance between the sowing pipe and the ground can be flexibly adjusted according to the field condition, the whole adjusting operation process is convenient and quick, the positioning is accurate, and the sowing depth can be effectively adjusted;

3. the front-back spacing of the front sowing pipe and the rear sowing pipe can be adjusted according to working conditions (such as the amount of weeds, soil quality and the like) so as to adapt to different working conditions and soil moisture requirements, impurities such as straws, weeds and the like can smoothly slide down from the gap between the front sowing pipe and the rear sowing pipe, and the phenomena of grass hanging, soil hilling and the like can be greatly reduced;

4. the lower half part of each sowing pipe is an arc-shaped arc part which is back to the advancing direction of the agricultural machine, according to stress analysis, impurities such as straws and weeds are not easy to hang on the sowing pipe, and the impurities such as the straws and the weeds hung on the sowing pipe are easy to slide down along the sowing pipe under the comprehensive action of various backward and downward forces such as soil breaking and beating of a rotary tillage device, soil friction and the like, so that the phenomena of soil hilling, grass hanging and the like are reduced, and meanwhile, the occurrence of seed airing is reduced;

5. can more effectually break up the seed, do benefit to even seeding, when the seed falls from seeding pipe upper portion, the circular arc portion of seed through the seeding pipe rolls to its below, the seed rubs with the seeding pipe inner wall, the collision, roll, motion such as spring, the seed of gathering together is broken up, when the seed falls to the seeding bottom of tubes portion, receive the middle circular arc steel sheet that makes progress the uplift and block the effect and rebound, carry out disorderly collision and friction with the seed of other whereabouts, the seed is further broken up, and finally, the seed falls down from the circular arc portion lowest end of seeding pipe with more dispersed state very smoothly, carry out intensive mixing with the hack of rotary cultivator rotary tillage device rotary tillage, through the roller suppression, accomplish whole seeding process.

Drawings

Fig. 1 is a perspective assembly view of the present invention.

Fig. 2 is a side schematic view of the present invention.

Fig. 3 is a perspective view of the sowing support cross frame in the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an enlarged view of a portion B in fig. 3.

Fig. 6 is a schematic view of the structure of the seeding pipe.

Detailed Description

The invention will be further described with reference to the accompanying figures 1-6 and specific examples.

It should be noted that, in the prior art, the front and the back are based on the moving direction of the device during tillage and seeding, the front side or the front is the side or the side conforming to the advancing direction of the agricultural machinery, and vice versa, and the positions of the left and the right sides are defined based on the moving direction based on the overlooking angle.

As shown in fig. 1-3, a wheat wide-width uniform sowing device with controllable sowing depth comprises a frame 10, a wheat hopper box 2 which is arranged on the frame 10 and is used for containing seeds, a plurality of sowing pipes 1 which are fixedly arranged on the frame 10 and run through up and down, and a seed conveying component which is used for conveying the seeds in the wheat hopper box 2 to all the sowing pipes 1. The sowing pipe 1 is positioned behind the soil retaining curtain 14 at the rear side of the rotary blade group 13, when the sowing pipe is used, the rotary tillage driving part 12 drives the rotary blade group 13 to rotate at a high speed for tillage, and the soil retaining curtain 14 blocks mud thrown backwards so as to avoid influencing the sowing process of the sowing pipe 1.

Fixed mounting has a pair of bilateral symmetry's outrigger 7 on above-mentioned frame 10, be equipped with the seeding support crossbearer 6 that the level extends between two outriggers 7, seeding support crossbearer 6 is an integral crossbeam structure, also can be the structural style of other crossbeams, do not injure in this embodiment, seeding support crossbearer 6's length direction perpendicular to agricultural machinery advancing direction, two outriggers 7 all are equipped with lift adjustment assembly, two outriggers 7 hang the left and right ends of connecting seeding support crossbearer 6 respectively through lift adjustment assembly.

As shown in fig. 3 and 5, a plurality of seeding tube sets are arranged on the seeding support cross frame 6 at equal intervals along the length direction of the seeding tube sets, each seeding tube set comprises a plurality of seeding tubes 1, the seeding tubes 1 of each seeding tube set are divided into a front row and a rear row, a front row of each seeding tube set is provided with a front seeding tube 1a, a rear row of each seeding tube set is provided with two rear seeding tubes 1b, the front seeding tubes 1a and the rear seeding tubes 1b are staggered, which is equivalent to the fact that the front seeding tubes 1a are just opposite to the central part of the gap between the two rear seeding tubes 1b, and the missed seeding and the seed airing are effectively prevented by the staggered arrangement of the front seeding tubes 1a and the rear seeding tubes 1 b.

In order to spread the seeds during the falling process for the purpose of uniform sowing, as shown in fig. 6, each sowing pipe 1 comprises:

the upper end of the vertical part 101 of the vertical pipe structure is communicated with the discharge end of the seed conveying part;

the arc part 102 of the arc tube structure is bent backwards, the uppermost end of the arc part 102 is communicated with the lower end of the vertical part 101, and the lowermost end of the arc part is obliquely opposite to and close to the ground;

the arc steel plate 103 is used for scattering seeds, the arc steel plate 103 extends along the arc length direction of the lower side of the inner wall of the arc part 102, the section of the arc steel plate 103 is of an upwardly arched arc structure, and the arc steel plate 103 is welded to the lower side of the inner wall of the arc part 102 in the middle when seen in the section direction of the arc part 102;

the lowermost end of the circular arc steel plate 103 corresponds to the lowermost end of the circular arc part 102 and is provided with a terminal tilting part 103a extending out of the lowermost end of the circular arc part 102, the terminal tilting part 103a is tilted upwards by 15 degrees relative to the main body of the circular arc steel plate 103, the length of the lowermost end of the extending circular arc part 102 of the terminal tilting part 103a is 8mm, the terminal tilting part 103a is also of a circular arc plate structure and is similar to the sectional structure of the circular arc steel plate 103, and the horizontal included angle between the left edge and the right edge of the terminal tilting part 103a is 60 degrees.

As shown in fig. 5, each seeding pipe set is provided with a rear pipe mounting bracket 104 mounted on the seeding support cross frame 6, the rear seeding pipe 1b of each seeding pipe set is fixedly arranged on the rear pipe mounting bracket 104, the rear pipe mounting bracket 104 is adjustably mounted on the seeding support cross frame 6 in a front-back manner, the seeding support cross frame 6 is provided with corresponding oblong holes, each oblong hole corresponds to one rear pipe mounting bracket 104, the rear pipe mounting bracket 104 is erected on the seeding support cross frame 6, then two bolts are respectively passed through the two oblong holes after passing through the rear pipe mounting bracket 104, and then the two bolts are screwed down by nuts, if the position of the rear pipe mounting bracket 104 needs to be adjusted in a front-back manner, the nuts are unscrewed, so that the rear pipe mounting bracket 104 slides back and forth along the oblong holes, the nuts are screwed down after being moved in place, thereby locking the position of the rear pipe mounting bracket 104, so that the rear seeding pipe 1b is slidably adjusted back and forth relative to the front seeding pipe, can be adjusted according to the working conditions (such as the amount of weeds, soil quality and the like) to adapt to different working conditions and soil moisture requirements, impurities such as straws, weeds and the like can smoothly slide down from the clearance between the front sowing pipe 1a and the rear sowing pipe 1b, and the phenomena of grass hanging, soil hilling and the like can be greatly reduced.

In order to press seeds into soil after sowing, as shown in fig. 1 and 2, a press roller group 11 for pressing the seeds falling to the ground into the soil is arranged at a position behind the sowing support cross frame 6 of the rack 10, the press roller group 11 is provided with a roller shaft 11a, the roller shaft 11a is parallel to the sowing support cross frame 6, two ends of the roller shaft 11a are rotatably connected with the rack 10 and rotate around the axis of the agricultural machine when the agricultural machine advances, a plurality of press rollers 11b are coaxially arranged on the roller shaft 11a, the outer peripheral wall of each press roller 11b is in rolling contact with the ground when the agricultural machine is used, the press rollers 11b roll the ground by means of the self weight of the machine, all the press rollers 11b are arranged at equal intervals along the axial direction of the roller shaft 11a, the number of the press rollers 11b is equal to the number of sowing sets of the sowing sets, and the press rollers 11 b.

When the seed falls from seeding pipe 1 upper portion, the seed rolls to its below through circular arc portion 102 of seeding pipe 1, the seed rubs with seeding pipe 1 inner wall, the collision, roll, motion such as bounce, the seed of gathering together is broken up, when the seed falls to seeding pipe 1 bottom, receive the effect of blockking of the circular arc steel sheet 103 that upwards uplifts in the middle of receiving and rebound, collide with the seed of other whereabouts and rub, the seed is further broken up, finally, the seed falls from seeding pipe 1's circular arc portion 102 least significant end with more dispersed state very smoothly, carry out intensive mixing with the hack of rotary cultivator rotary tillage, through the suppression of suppression roller 11b, accomplish whole even seeding process.

Due to the arrangement of the tail end tilting part 103a, when the seeds fall on the tail end tilting part 103a, the seeds are further blocked and bounce upwards, so that the seeds are further scattered, a fan shape of about 60 degrees is formed, and the seeds are broadcast outwards, and the seeding uniformity is improved.

In order to ensure the uniform sowing process, the present embodiment can relatively evenly distribute the seeds into the sowing pipes 1, and the seed conveying unit includes a motor 5, a plurality of seed sowing devices 3 mounted at the bottom of the wheat case 2, and a plurality of groups of conveying pipes 4, and each group of conveying pipes 4 includes two conveying pipes. The number of the seed metering devices 3 is equal to that of the seeding pipes 1, the seed metering devices are in one-to-one correspondence, all the seed metering devices 3 are horizontally arranged in a row, the arrangement direction of the seed metering devices 3 is parallel to that of the seeding pipe groups, and the output main shaft of the motor 5 is in transmission fit with all the seed metering devices 3 so as to drive the seed metering devices 3 to convey seeds into the conveying pipes 4. The number of the groups of the conveying pipes 4 is equal to the number of the seeding pipes 1, and each seeding unit 3 is downwards communicated with one corresponding seeding pipe 1 through two conveying pipes 4.

In order to realize the adjustable sowing depth of the seeds, as shown in fig. 4, the lifting adjusting component comprises a lifting adjusting screw 8 which is vertically arranged, the lifting adjusting screw 8 simultaneously passes through a suspension bracket 7 and a sowing supporting cross frame 6, two groups of locking nuts 9 are sleeved on the lifting adjusting screw 8, one group of the locking nuts 9 locks the lifting adjusting screw 8 on the suspension bracket 7, the other group of the locking nuts 9 locks the lifting adjusting screw 8 on the sowing supporting cross frame 6, the suspension bracket 7 is provided with a front and a rear distance adjusting holes 7a which are vertically communicated and have a long round hole structure, the length direction of the front and rear distance adjusting holes 7a is parallel to the advancing direction of the agricultural machine, the lifting adjusting screw 8 passes through the front and rear distance adjusting holes 7a, the whole sowing supporting cross frame 6 can be driven to carry out front and rear adjustment along the front and rear distance adjusting holes 7a, and the distance adjustment can be carried out according to the working conditions (such as, so as to adapt to different working conditions and soil moisture requirements.

Owing to set up lift adjusting screw 8 and lock nut 9, can order about seeding support crossbearer 6 and adjust from top to bottom along lift adjusting screw 8, then utilize lock nut 9 latched position to adjust the interval between seeding pipe 1 and the ground in a flexible way according to the on-the-spot condition, the operation process convenient and fast of whole regulation, the location is accurate, can effectively adjust the seeding degree of depth, the degree of consistency, and the adaptation rotary tillage that seeding volume can be fine covers soil volume, reduces too much earthing and the emergence of kind of phenomenon of drying in the air.

While the preferred embodiments of the present invention have been described, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the appended claims.

Claims

1. The utility model provides a device is all broadcast to controllable wheat broad width of sowing deeply, includes frame (10) to and install in frame (10), be used for the wheat fill case (2) of splendid attire seed, and a plurality of fixed set up in frame (10), seed sowing pipe (1) that link up from top to bottom, and be arranged in carrying the seed in wheat fill case (2) to the seed conveying component in all seed sowing pipes (1), its characterized in that: a pair of suspension supports (7) which are symmetrically distributed left and right are fixedly installed on the rack (10), a seeding support transverse frame (6) which extends horizontally is arranged between the two suspension supports (7), the length direction of the seeding support transverse frame (6) is perpendicular to the advancing direction of the agricultural machine, the two suspension supports (7) are respectively provided with a lifting adjusting assembly, and the two suspension supports (7) are respectively connected with the left end and the right end of the seeding support transverse frame (6) in a suspension manner through the lifting adjusting assemblies;

a plurality of seeding pipe groups which are arranged at equal intervals along the length direction of the seeding support cross frame (6) are installed on the seeding support cross frame, each seeding pipe group comprises a plurality of seeding pipes (1), the seeding pipes (1) of each seeding pipe group are divided into a front row and a rear row, the front row of each seeding pipe group is at least provided with one front seeding pipe (1a), the rear row of each seeding pipe group is at least provided with two rear seeding pipes (1b), and the front seeding pipes (1a) and the rear seeding pipes (1b) are arranged in a staggered mode;

each seeding pipe (1) comprises:

the upper end of the vertical part (101) of the vertical pipe structure is communicated with the discharge end of the seed conveying part;

the arc part (102) of the arc pipe structure is bent backwards, the uppermost end of the arc part (102) is communicated with the lower end of the vertical part (101), and the lowermost end of the arc part is obliquely opposite to and close to the ground;

the arc steel plate (103) is used for scattering seeds, the arc steel plate (103) extends along the arc length direction of the lower side of the inner wall of the arc part (102), the section of the arc steel plate (103) is of an upwardly arched arc structure, and the arc steel plate (103) is welded to the lower side of the inner wall of the arc part (102) in the middle when seen in the section direction of the arc part (102);

the lowest end of the arc steel plate (103) corresponds to the lowest end of the arc part (102) and is provided with a tail end tilting part (103a) extending out of the lowest end of the arc part (102), and the tail end tilting part (103a) is tilted upwards relative to the main body of the arc steel plate (103).

2. The wheat wide-width uniform sowing device with controllable sowing depth as claimed in claim 1, characterized in that: the tail end tilting part (103a) is tilted upwards by 10-20 degrees relative to the main body of the arc steel plate (103).

3. The wheat wide-width uniform sowing device with controllable sowing depth of claim 2, characterized in that: the length of the lowest end of the protruding arc part (102) of the tail end tilting part (103a) is 5-10 mm.

4. The wheat wide-width uniform sowing device with controllable sowing depth as claimed in claim 1, characterized in that: each seeding pipe group is provided with a rear pipe mounting rack (104) arranged on the seeding support cross frame (6), and the rear seeding pipe (1b) of each seeding pipe group is fixedly arranged on the rear pipe mounting rack (104).

5. The wheat wide uniform sowing device with controllable sowing depth of claim 4, wherein: the rear pipe mounting rack (104) is arranged on the seeding support cross frame (6) in a front-back adjustable mode.

6. The wheat wide-width uniform sowing device with controllable sowing depth as claimed in claim 1, characterized in that: the lifting adjusting assembly comprises a lifting adjusting screw rod (8) which is vertically arranged, the lifting adjusting screw rod (8) penetrates through the hanging support (7) and the seeding supporting cross frame (6) simultaneously, the lifting adjusting screw rod (8) is sleeved with two sets of locking nuts (9), one set of locking nuts (9) locks the lifting adjusting screw rod (8) on the hanging support (7), and the other set of locking nuts (9) locks the lifting adjusting screw rod (8) on the seeding supporting cross frame (6).

7. The wheat wide uniform sowing device with controllable sowing depth of claim 6, wherein: the agricultural machinery distance adjusting device is characterized in that a front distance adjusting hole (7a) and a rear distance adjusting hole (7a) which are communicated up and down and have a long round hole structure are formed in the suspension bracket (7), the length direction of the front distance adjusting hole and the rear distance adjusting hole (7a) is parallel to the advancing direction of the agricultural machinery, and the lifting adjusting screw (8) penetrates through the front distance adjusting hole and the rear distance adjusting hole (7 a).

8. The wheat wide-width uniform sowing device with controllable sowing depth as claimed in claim 1, characterized in that: the position of frame (10) after being in the seeding and supporting crossbearer (6) is equipped with and is arranged in the roller set (11) of pressing into the soil with the seed that falls to the ground, roller set (11) have a roller (11a), roller (11a) support crossbearer (6) parallel with the seeding, roller (11a) both ends are rotated and are connected frame (10) and use its axis as the rotation of making perfect when the agricultural machinery advances, the coaxial a plurality of compression roller (11b) that are provided with on roller (11a), the periphery wall of compression roller (11b) when using and ground rolling contact, roller (11a) axial equidistant arrangement is followed in all compression roller (11b), the quantity of compression roller (11b) equals with the cover number of seeding nest of tubes, compression roller (11b) are in the positive rear of seeding, and just right one by one.

9. The wheat wide uniform sowing device with controllable sowing depth according to any one of claims 1 to 8, characterized in that: the seed conveying part comprises a motor (5), a plurality of seed metering devices (3) arranged at the bottom of the wheat hopper box (2) and a plurality of groups of conveying pipes (4);

the number of the seed metering devices (3) is equal to that of the seeding tubes (1), the seeding devices (3) correspond to one another, all the seed metering devices (3) are horizontally arranged in a row, the arrangement direction of the seed metering devices (3) is parallel to that of the seeding tube groups, and the output main shaft of the motor (5) is in transmission fit with all the seed metering devices (3) to drive the seed metering devices (3) to convey seeds into the conveying pipe (4);

the number of the groups of the conveying pipes (4) is equal to the number of the seeding pipes (1), and each seeding unit (3) is downwards communicated with one corresponding seeding pipe (1) through one group of conveying pipes (4).