CN207531388U - The buried chopper of air-flowing type band straw collecting - Google Patents

Abstract

A kind of buried chopper of air-flowing type band straw collecting, pick-up unit, straw conveyor, ditching device, covering device and suppression device are crushed including the stubble-cleaning in rack, transmission device and rack from front to back, the conveying device includes bionical auger conveyor, wind turbine, conveyance conduit and device for discharging, shaft one end of bionical auger conveyor is connected in rack, and the other end is connected to the inlet of wind turbine.Stalk, is delivered to the device for discharging after ditching device by fan outlet end connecting conveying pipe road.The bionical hemispherical protuberances of scroll arrangement are disposed on the helical blade surface of the auger conveyor.The utility model can further crush on ground by leaving the stalk layer that length differs after harvest corn machine operation, collect into band, in the zanjon opened by stalk air-flowing type conveying device importing ditching device, realize that stalk is entirely buried, also there are hack and subsoiling simultaneously, realize the crushing of band stalk, conveying, trench digging, buried, earthing and suppression.

Description

The buried chopper of air-flowing type band straw collecting

Technical field

The invention belongs to agricultural machinery technological field, more particularly to a kind of buried returning to the field of air-flowing type band straw collecting Machine.

Background technology

Agricultural crop straw is one of main waste in agricultural production, containing abundant nitrogen, phosphorus, potassium and trace element into Point.Chinese stalk resource very abundant, it is about 6 × 10 to produce various crop materials per year at present⁸~8 × 10⁸T, but only four/ One straw-returning, remaining stalk is for feed, fuel etc., and a large amount of stalk is incinerated, accumulates or abandons, and both causes resource Waste, and cause environmental pollution.Crop straw burning can also cause the evaporation of soil moisture and the destruction of soil texture, make soil plate Knot, fertility decline, and soil ecosystem deteriorates, and crop yield declines.And straw-returning has well the physicochemical character of soil Improvement result is an important technology of stalk comprehensive utilization.Stalk is buried in soil, and mineralising release is carried out in decomposable process Nutrient, while humification is also carried out, increase soil organic matter content, reduce the soil weight, increase soil porosity, improve soil Water conservation, ventilative, fertilizer conservation and other effects, improve soil adjust in itself water, fertilizer, air and heat ability, effectively improve soil plough horizon knot Structure.This equipment is that " the reasonable topsoil constructing technology in nonirrigated farmland refers to for Ministry of Agriculture's public welfare industry (agricultural) scientific research specific project expenditure project A kind of novel straw of the reasonable topsoil structure outfitting tool development in mark research " (201503116) Northeast plain middle and south Yu Yang nonirrigated farmlands The buried chopper of stalk.The technology be it is a kind of stalk and corn stubble are crushed after it is buried in band ditch, which can effectively solve Certainly straw-returning problem is burnt improving soil physico-chemical characteristic, increasing soil plough horizon depth, reduction farmland carbon emission, mitigation stalk Burn the environmental problem brought.

Invention content

For above-mentioned technical problem, the present invention provides a kind of buried chopper of air-flowing type band straw collecting, full While the sufficient reasonable topsoil constructing technology in nonirrigated farmland requires, the functions such as stalk crushing, trench digging, buried, earthing and suppression are realized.

The purpose of the present invention is achieved through the following technical solutions：

A kind of buried chopper of air-flowing type band straw collecting, including rack, transmission device and in the rack by The stubble-cleaning of front to back crushes pick-up unit, conveying device, ditching device, covering device and suppression device；

The conveying device includes auger conveyor case, bionical auger conveyor, wind turbine, conveyance conduit and discharge duct Road, shaft one end of bionical auger conveyor are connected in rack, install the 4th belt wheel of transmission device, other end connection thereon In the inlet of wind turbine, wind turbine is positioned over the side of rack, and stalk is delivered to be located at and open by fan outlet end connecting conveying pipe road Discharge pipe after ditch device；

The hemispherical protuberances of scroll arrangement are disposed on the helical blade surface of the auger conveyor；

Crushing straw is collected, is transported to wind turbine by the conveying device, and stalk is thrown biography by the airflow function of wind turbine Discharge pipe is sent, stalk is inducted into the zanjon that ditching device outputs by transmission discharge pipe.

Preferably, the distance of center circle t of the adjacent two halves ball bumps on the helical blade surface be 23~25mm, same to half Arc length residing for two protrusions on diameter circle on radius circleFor 25~27mm, the diameter d of bionical hemispherical protuberances for 10~ 12mm。

Preferably, stubble-cleaning is crushed between pick-up unit and conveying device below the bionical auger conveyor case Central angle γ unloads native hole and is staggered uniformly to unload native hole, adjacent two row in the range of 150 °~170 °, makes the adjacent of adjacent two row Three are unloaded the native hole line of centres in equilateral triangle, and adjacent two unload native hole distance of center circle s as 60~65mm.

Preferably, stubble-cleaning crushing pick-up unit includes paring shaft, Y types crushing knife and the bionical helical feed Device case arranges Y type crushing knifes on paring shaft in double helix；It is placed on the bionical auger conveyor case above paring shaft and installs There are ledger-plate, stubble-cleaning crushing knife and the opposite installation of ledger-plate cooperation on bionical auger conveyor case, coordinate crushing straw, it will Two degree of crushing straws are thrown to bionical conveyor screw device；The central angle for installing the bionical auger conveyor case of ledger-plate is that δ is 150~170 °.

Preferably, the gap e on the case of the Y types crushing knife and reducing mechanism between stationary knife is 2~2.5mm；It is described Stubble-cleaning crush pick-up unit Y types crushing knife work when away from ground level q be 20~30mm.

Preferably, the ditching device is by two symmetrical parallel trench digging cutterheads being mounted on trench digging axis and mounted on opening Bionical ditching knife on ditch cutterhead；Two trench digging cutterhead spacing L are 250~350mm.

Preferably, the bionical trench digging blade part working end carry hangnail shape serrated edge, by end according to Length is sequentially distributed.

Preferably, the groove width h of each serrated edge of the ditching knife be 5~7mm, two neighboring zigzag knife The groove distance k of sword is 10~13mm, and the gash depth y of long serrated edge is 25~30mm, the groove of backsaw dentation blade Depth z is 23~25mm；The ditching depth of ditching knife reaches 250~300mm.

Preferably, the covering device is made of two symmetrical trailing bars arranged at an angle, two trailing bars folder Angle θ is 53 °~65 °；Two trailing bar installation end minimum spacing W are 120~130mm, and peace is adjusted by the location hole on trailing bar Fill angle and earthing plate spacing.

Preferably, the trailing bar length b is 450-470mm, height c is 370-390mm；Trailing bar 62 and ground Angle β is 65-75 °.

Beneficial effects of the present invention are：

1. earth's surface leaves length scale and differs after stubble-cleaning crushing pick-up unit realization autumn harvest corn machine operation of the present invention The stalk layer of 10~20cm or so further crush, collect into band, realize that band stalk is buried.

2. scroll is disposed on the bionical auger conveyor face of the present invention arranges the spherical pimple of bionical " toad " back protrusion, Reduce and rub between stalk and spiral organ face, improve stalk conveying speed.And in bionical toad back surfaces characteristic helical feed The case of device, which opens up, unloads native hole, and the soil block that stubble-cleaning crushing pick-up unit is brought is excluded in time, prevents blocking of the soil block to wind turbine, Reduce the generation of equipment energy consumption and failure.

3. the zigzag ditching knife of the bionical mantis front foot hangnail shape of the present invention, trench digging is brisk, efficient, effectively improves Equipment operating efficiency.Ditching device uses two 250~350mm of symmetrical furrower disc spacing, and adjustable setting can be according to stalk Different returning to the field amounts and strip width adjust furrower disc spacing.Reach 35~40cm of 250~300mm of ditching depth and width, it is full The buried technology requirement of sufficient band stalk, it is fine crushing that trench digging heel row goes out soil, plays the role of hack and subsoiling, and crushing straw is complete Portion is buried.

Description of the drawings

Fig. 1 is the dimensional structure diagram of the present invention.

Fig. 2 is the planar structure schematic diagram of Fig. 1.

Fig. 3 is Fig. 2 conveying device schematic diagrames.

Fig. 4 is the scheme of installation of case in Fig. 3.

Fig. 5 is that stationary knife scheme of installation is moved in Fig. 4.

Fig. 6 is the side view of case in Fig. 4.

Fig. 7 is that case unloads native hole schematic diagram in Fig. 4.

Fig. 8 is the direction view of bionical auger conveyor in Fig. 4.

Fig. 9 is ditching device schematic diagram in Fig. 2.

Figure 10 is ditching knife schematic diagram in Fig. 7.

Figure 11 is covering device schematic diagram in Fig. 2.

Figure 12 is trailing bar front view in Fig. 9.

Figure 13 is trailing bar left view in Fig. 9.

In figure:1. rack；

2. transmission device, 21. driving front casees, transmission case after 22., 23. first pulleys, 24. second belt wheels, 25. third bands Wheel, 26. the 4th belt wheels, 27. the 5th belt wheels, 28. the 6th belt wheels；

3. stubble-cleaning crushes pick-up unit, 31. paring shafts, 32.Y type crushing knifes, 33. crush case, 34. ledger-plates；

4. conveying device, 41. auger conveyor cases, 42. bionical auger conveyors, 43. wind turbines, 44. conveyance conduits, 45. discharge pipe, 46. unload native hole；

5. ditching device, 51. trench digging axis, 52. trench digging cutterheads, 53. ditching knifes；

6 covering devices, 61. trailing bar location holes, 62. trailing bars；7. suppress device.

Specific embodiment

The present invention will be described in detail with reference to the accompanying drawings and examples.

Embodiment 1：As Figure 1-Figure 2, a kind of buried chopper of air-flowing type band straw collecting of the present invention, including rack 1st, transmission device 2 and in the rack 1 stubble-cleaning from front to back crush pick-up unit 3, conveying device 4, ditching device 5, Covering device 6 and suppression device 7.

As shown in figure 3, the conveying device 4 include auger conveyor case 41, bionical auger conveyor 42, wind turbine 43, Conveyance conduit 44 and discharge pipe 45, shaft one end of bionical auger conveyor 42 are connected in rack 1, the dress of installation transmission thereon 2 the 4th belt wheel 26 is put, is provided by it power, the other end is connected to the inlet of wind turbine 43, and wind turbine 43 is positioned over the one of rack 1 Stalk, is delivered to the discharge pipe 45 after ditching device 5 by side, 43 port of export connecting conveying pipe road 44 of wind turbine；It is described defeated Device 4 is sent to collect crushing straw, be transported to wind turbine, stalk is thrown into transmission discharge pipe by the airflow function of wind turbine, by Stalk is inducted into the zanjon that ditching device 5 outputs by transmission discharge pipe 45.

The function that the stubble-cleaning crushes pick-up unit 3 is that earth's surface leaves length scale and differs after autumn harvest corn machine operation The stalk layer of 10~20cm or so further crush, collect into band.It will by the airflow function of the wind turbine 43 of conveying device 4 After stalk throws certain altitude, stalk is inducted into the zanjon that ditching device 5 outputs by discharge pipe 45.The earthing dress It puts 6 and a large amount of stalk is embedded to deep soil.The suppression device 7 prevents soil by the stalk of band is buried and soil compression The evaporation of water in soil.

Preferably, as shown in figure 8, the bionical auger conveyor 42 is the spiral transferring of bionical toad back surfaces characteristic Device is sent, the hemispherical protuberances of scroll arrangement are evenly equipped on helical blade surface thereon, " pimple " at similar toad back is used It rubs between stalk and spiral organ face in reducing, improves stalk conveying speed；The distance of center circle t of two neighboring hemispherical protuberances is 23mm, with the arc length residing for two protrusions on Radius circle on radius circleIt is for 25mm, the diameter d of hemispherical protuberances 10mm。

Preferably, as shown in fig. 6, stubble-cleaning crushes pick-up unit 3 and conveying below the auger conveyor case 41 Central angle γ between device 4 is uniformly unloads native hole 46 in the range of 150~170 ° (being evenly distributed with from center line to both sides)；Such as Fig. 7 institutes Showing, adjacent two row unload native hole 46 and are staggered, and it is in equilateral triangle that adjacent two adjacent three arranged is made, which to unload native 46 line of centres of hole, this Example unloads native 46 diameter D of hole as 25mm, and adjacent two unload native 46 distance of center circle s of hole as 60~65mm.

Preferably, as shown in figure 4, the stubble-cleaning, which crushes pick-up unit 3, includes paring shaft 31, Y types crushing knife 32 and institute The bionical auger conveyor case 41 stated, in double helix arrangement Y types crushing knife 32 on paring shaft 31；It is placed in imitative above paring shaft Ledger-plate 34, Y types crushing knife 32 and the stationary knife on bionical auger conveyor case 41 are installed on raw auger conveyor case 41 Piece 34 coordinates opposite installation, and the Y types crushing knife 32 and ledger-plate of this example are 16, coordinates crushing straw, and straw are crushed by two degree Stalk is thrown to bionical conveyor screw device 42；The central angle of bionical auger conveyor case 41 is that δ is 150~170 °.The stubble-cleaning It picks up and second belt wheel 24 and third belt wheel 25 is installed on the paring shaft 31 of reducing mechanism 3, driving front is connected by the second belt wheel 24 The first pulley 23 of 21 output terminal of case installation, the 4th belt wheel in bionical 42 shaft of auger conveyor is connected by third belt wheel 25 26, passing power.

Preferably, as shown in figure 5, it is 2mm that Y types flail knife 32 and stationary knife 34, which install gap e,.

Preferably, as shown in fig. 6, being away from ground q when the Y types crushing knife 32 that the stubble-cleaning crushes pick-up unit 3 works 20mm。

Preferably, as shown in Figure 9, Figure 10, the ditching device 5 is ditched by two symmetrical parallel are mounted on axis 51 Trench digging cutterhead 52 and the bionical ditching knife 53 on trench digging cutterhead 52；And two trench digging cutterhead 52 can trench digging axis 51 on axis To movement, to adjust trench digging width, two 52 spacing L of trench digging cutterhead are 250mm.As shown in Figure 10, the bionical ditching knife 53 The blade working end of the bionical ditching knife 53 carries the serrated edge of hangnail shape, i.e.,：Bionical mantis front foot hangnail Dentate groove is sequentially distributed by end according to length.The groove width h of 53 each serrated edge of ditching knife is 7mm, the groove distance k of two neighboring serrated edge is 10mm, and the gash depth y of long serrated edge is 25mm, short ditch saw Gullet depth z is 23mm.51 one end of trench digging axis connection the 6th belt wheel 28 of power output, passes through transmission case after the 6th belt wheel 28 connects The 5th belt wheel 27 installed on 22 output shafts, passing power.The dentate groove increases the surface area of ditching knife 53, reduces And the pressure of soil block contact surface, reduce when blade moves in the soil the power loss caused by friction, strengthen blade Hack cut native ability, the power of machine consumption is reduced stalk is buried while.The trench digging of the ditching device 5 hack effect Good, ditching depth reaches 250~300mm, meets the buried technology of stalk and requires and complete hack Subsoiler, and it is economical to reduce kind of ground Cost.

Preferably, as shown in figures 11-13, the covering device is by two symmetrical trailing bars arranged at an angle 62 are formed, and trailing bar 62 installs connecting pin and is provided with multiple location holes 61, can be with lateral adjustments by connecting different location holes 61 The width and angle of two trailing bars 62, two trailing bars, 62 angle theta are 53 °；Two trailing bars, 62 installation end minimum spacing W is 120mm, By adjusting the setting angle and spacing of trailing bar, it is adjustable to reach earthing amount.Preferably, as shown in Figure 12 and Figure 13, it is described to cover The length b of native plate 62 is 450mm, height c is 370mm；Trailing bar 62 and the angle β on ground are 65 °.

There are preposition transmission case 21 and rear transmission case 22 on the transmission device 2, tractor motive power output shaft passes power Preposition transmission case 21 is moved, preposition transmission case 21 delivers power to rear transmission case 22 and the first band positioned at 1 side of rack Power is passed to stubble-cleaning and crushes the second belt wheel 24 on the paring shaft 31 of pick-up unit 3 by wheel 23, first pulley 23 on transmission case, Power is passed to the 4th belt wheel 26 on 4 bionical auger conveyor 42 of conveying device by the third belt wheel 25 installed on paring shaft 31, Rear transmission case 22 is transmitted power on the 5th belt wheel 27 of 1 one end of rack, and power is passed to trench digging by the 5th belt wheel 27 The 6th belt wheel 28 on cutterhead 51.

The present invention operation principle be：

The hanger bracket of the buried chopper of air-flowing type band straw collecting and matching tractor suspension mechanism are passed through before operation The mode of trifilar suspension connects, then by preposition transmission case 21 and tractor output shaft by cardan drive axis connection, by drawing Machine band movement machine works into ground and rotates output shaft, when stubble-cleaning crushes pick-up unit 3 by earth's surface root stubble and stalk, Y type powder Broken knife 32 rotates the stalk that will be scattered and the chopping of earth's surface root stubble with paring shaft 31, and subsequent stalk is delivered to bionical auger conveyor In 42, the bionical protrusion similar to toad back protrusion is distributed on bionical auger conveyor 42, when can increase stalk conveying With the friction of bionical auger conveyor, friction efficiency is improved, and increase and do not unload unearthed rotation angle, got rid of the soil not drawn off Go out.The soil that earth's surface is taken up is drawn off from unloading in native hole 46, and 43 inner impeller high-speed rotation of wind turbine generates pressure, by the stalk after crushing It sucks on wind turbine 43, under the blowing force effect of wind turbine, stalk is thrown in conveyance conduit 44, subsequent discharge pipe 45 is by stalk It is inducted into the zanjon that ditching device 5 is outputed.Covering device 6 walk when the soil of ditch both sides is pushed back in ditch, by stalk it is buried in In 25~30cm zanjons, then suppressed by suppression device 7, by crushing straw and soil compression.The width of device 7 is suppressed with opening The ditch width that ditch device 5 is outputed is adapted, by its completely suppress, make field earth's surface stalk and root stubble crush and it is buried in soil In, realize the buried returning to the field of band stalk.

Embodiment 2：This example is as different from Example 1：As shown in figure 8, the bionical auger conveyor 42 described in this example Helical blade surface on the hemispherical protuberances that arrange, the distance of center circle t of two neighboring hemispherical protuberances is 25mm, is justified with Radius On two protrusions residing for radius circle on arc lengthFor 27mm, the diameter d of hemispherical protuberances is 12mm.

As shown in fig. 6, the diameter D for unloading native hole 46 set below the auger conveyor case 41 for 25~ 35mm, adjacent two unload native 46 distance of center circle s of hole as 65mm.

As shown in figure 5, it is 2.5mm that Y types flail knife 32 and stationary knife 34, which install gap e,.As shown in fig. 6, the stubble-cleaning crushing is picked up Pick up device 3 Y types crushing knife 32 work when away from ground q be 30mm.

Preferably, as shown in Figure 9, Figure 10, the two 52 spacing L of trench digging cutterhead are 350mm.As shown in Figure 10, it is described 53 each serrated edge of ditching knife groove width h for 5mm, the groove distance k of two neighboring serrated edge is 13mm, The gash depth y of long serrated edge is 30mm, and short ditch sawtooth groove depth z is 25mm；The ditching depth of ditching knife reaches 250~ 300mm。

Two trailing bars, 62 angle theta is 65 °；Two trailing bars, 62 installation end minimum spacing W is 130mm, passes through adjusting The setting angle and spacing of trailing bar, it is adjustable to reach earthing amount.As shown in Figure 12 and Figure 13, the length b of the trailing bar 62 is 470mm, height c are 390mm；Trailing bar 62 and the angle β on ground are 75 °.

Embodiment 3：This example is as different from Example 1：As shown in figure 8, the bionical auger conveyor 42 described in this example Helical blade surface on the hemispherical protuberances that arrange, the distance of center circle t of two neighboring hemispherical protuberances is 24mm, is justified with Radius On two protrusions residing for radius circle on arc lengthFor 26mm, the diameter d of hemispherical protuberances is 11mm.

As shown in fig. 6, the diameter D for unloading native hole 46 set below the auger conveyor case 41 for 25~ 35mm, adjacent two unload native 46 distance of center circle s of hole as 62mm.

As shown in figure 5, it is 2.2mm that Y types flail knife 32 and stationary knife 34, which install gap e,.As shown in fig. 6, the stubble-cleaning crushing is picked up Pick up device 3 Y types crushing knife 32 work when away from ground q be 25mm.

Preferably, as shown in Figure 9, Figure 10, the two 52 spacing L of trench digging cutterhead are 300mm.As shown in Figure 10, it is described 53 each serrated edge of ditching knife groove width h for 6mm, the groove distance k of two neighboring serrated edge is 12mm, The gash depth y of long serrated edge is 28mm, and short ditch sawtooth groove depth z is 24mm；The ditching depth of ditching knife reaches 250~ 300mm。

Two trailing bars, 62 angle theta is 65 °；Two trailing bars, 62 installation end minimum spacing W is 130mm, passes through adjusting The setting angle and spacing of trailing bar, it is adjustable to reach earthing amount.As shown in Figure 12 and Figure 13, the length b of the trailing bar 62 is 460mm, height c are 380mm；Trailing bar 62 and the angle β on ground are 70 °.

Claims (10)

1. a kind of buried chopper of air-flowing type band straw collecting, by preceding including rack, transmission device and in the rack Stubble-cleaning after crushes pick-up unit, conveying device, ditching device, covering device and suppression device；It is characterized in that：

The conveying device includes auger conveyor case, bionical auger conveyor, wind turbine, conveyance conduit and discharge pipe, imitates Shaft one end of raw auger conveyor is connected in rack, installs the 4th belt wheel of transmission device thereon, and the other end is connected to wind The inlet of machine, wind turbine are positioned over the side of rack, and stalk is delivered to positioned at trench digging dress by fan outlet end connecting conveying pipe road The discharge pipe postponed；

The hemispherical protuberances of scroll arrangement are disposed on the helical blade surface of the auger conveyor；

Crushing straw is collected, is transported to wind turbine by the conveying device, and stalk is thrown transmission by the airflow function of wind turbine unloads Stalk is inducted into the zanjon that ditching device outputs by pipe material by transmission discharge pipe.

2. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The helical blade table The distance of center circle t of adjacent two halves ball bumps on face be 23~25mm, with Radius circle on two protrusions residing for radius circle on Arc lengthFor 25~27mm, the diameter d of bionical hemispherical protuberances is 10~12mm.

3. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：In the bionical spiral shell It is equal in the range of 150 °~170 ° to revolve the central angle γ that stubble-cleaning below conveyer case is crushed between pick-up unit and conveying device Cloth unloads native hole, and adjacent two row unload native hole and are staggered, and it is in equilateral triangle that adjacent two adjacent three arranged is made, which to unload the native hole line of centres, Adjacent two unload native hole distance of center circle s as 60~65mm.

4. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The stubble-cleaning crushes Pick-up unit includes paring shaft, Y types crushing knife and the bionical auger conveyor case, is in that double helix arranges Y on paring shaft Type crushing knife；It is placed on the bionical auger conveyor case above paring shaft and ledger-plate is installed, stubble-cleaning crushing knife and bionical spiral shell The opposite installation of ledger-plate cooperation on conveyer case is revolved, coordinates crushing straw, two degree of crushing straws is thrown to bionical conveying Spiral organ；It is 150~170 ° that the central angle for installing the bionical auger conveyor case of ledger-plate, which is δ,.

5. the buried chopper of air-flowing type band straw collecting according to claim 4, it is characterised in that：The Y types crush Gap e on the case of knife and reducing mechanism between stationary knife is 2~2.5mm；The stubble-cleaning crushes the Y type crushing knife works of pick-up unit When making away from ground level q be 20~30mm.

6. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The ditching device By two symmetrical parallel trench digging cutterheads being mounted on trench digging axis and the bionical ditching knife on trench digging cutterhead；Two ditching knifes Disk spacing L is 250~350mm.

7. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The bionical trench digging Blade part working end carries the serrated edge of hangnail shape, is sequentially distributed by end according to length.

8. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The ditching knife is every The groove width h of a serrated edge is 5~7mm, and the groove distance k of two neighboring serrated edge is 10~13mm, long saw The gash depth y of dentation blade is 25~30mm, and the gash depth z of backsaw dentation blade is 23~25mm；The trench digging of ditching knife Depth reaches 250~300mm.

9. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The covering device It is made of two symmetrical trailing bars arranged at an angle, two trailing bar angle thetas are 53 °~65 °；Two trailing bar installation ends are most Small spacing W is 120~130mm, and setting angle and earthing plate spacing are adjusted by the location hole on trailing bar.

10. the buried chopper of air-flowing type band straw collecting according to claim 1, it is characterised in that：The trailing bar Length b is 450-470mm, height c is 370-390mm；Trailing bar 62 and the angle β on ground are 65-75 °.