CN211745272U

CN211745272U - Double-strip air-suction type cultivation fertilizing and seeding machine

Info

Publication number: CN211745272U
Application number: CN202020135456.XU
Authority: CN
Inventors: 李鸿鸽
Original assignee: 李鸿鸽
Current assignee: Heilongjiang Hanzhi Technology Development Co.,Ltd.
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-10-27
Anticipated expiration: 2030-01-20

Abstract

A double-strip air-suction type cultivating, fertilizing and seeding machine relates to a fertilizing and seeding machine. The utility model discloses a solve current two belt seeding monomer and can't carry out the batch seeding operation of large tracts of land, have the problem that land utilization is low. The utility model comprises a frame assembly and a plurality of double-belt seeding single bodies which are arranged on the frame assembly side by side; the relative circumference of two kind on the seed metering ware is planted the equal installation or the dislocation installation of hole, seed metering ware and two sets of ditching mechanism set up in the frame, the seed case sets up in the top of seed metering ware, two sets of ditching mechanism set up in the below of seed metering ware and the interval can be adjusted, respectively be equipped with a seed guide pipe on every ditching mechanism of group, the seed guide pipe sets up the below at the seed metering ware, and the entry of seed guide pipe is just right with the seed metering mouth of seed metering ware, suppression earthing mechanism sets up at the rear of seed metering ware and articulated with the frame, depth-limiting mechanism sets up between two sets of ditching mechanisms. The utility model is used for crops farming.

Description

Double-strip air-suction type cultivation fertilizing and seeding machine

Technical Field

The utility model relates to a fertilizing and seeding machine, in particular to a double-strip air-suction type cultivating and fertilizing and seeding machine, which belongs to the technical field of agricultural machinery.

Background

A seeding machine is a planting machine that takes crop seeds as a seeding target. Seeders for certain types or crops are often referred to by the name of the crop type, such as grain drill, corn hill planter, cotton planter, grass spreader, and the like. The drill seeder is mainly used for seeding small seeds such as grains, vegetables and pasture, and a grain drill is commonly used. During operation, the travelling wheels drive the seed sowing wheels to rotate, seeds are discharged into the seed conveying pipe from the seeds in the seed box according to the required sowing quantity, fall into the opened grooves through the furrow opener, and then are covered and compacted by the soil covering and compacting device. After emergence, the crops are in parallel and equidistant row lines. The seed drill for different crops has basically the same structure except that the seed sowing devices and the furrow openers of different types are adopted, and generally comprises a rack, a traction or suspension device, a seed box, a seed sowing device, a transmission device, a seed conveying pipe, a furrow opener, a row marker, a travelling wheel, a soil covering and compacting device and the like. The seeding quality is mainly influenced by a seed metering device and a furrow opener. Commonly used seeding apparatus are of the grooved wheel type, centrifugal type, millstone type and the like. The furrow opener can be of a hoe shovel type, a boot type, a sliding cutter type, a single disc type, a double disc type and the like.

With the rapid development of agricultural machinery in China, simply improving the operating efficiency of the seeder and reducing the cost cannot meet the development of the agricultural machinery, so people combine the agricultural machinery with the cultivated land and try to improve the yield of crops on a unit area by improving the seeder.

The general standard ridge width is 65cm, the plant spacing is 10cm, and one plant is planted in each ridge. Obviously, the planting mode does not reasonably utilize the land. Therefore, a single body for sowing in two bands is proposed, and the plants sowed by the single body are in two parallel bands. Compared with the conventional single row seeding, the method has already made a breakthrough progress. However, the seeding method is limited to a small-sized seeder test stage, large-area batch seeding operation cannot be performed, and the double-row seeding has a problem of low land utilization rate.

In conclusion, the existing double-belt seeding single body cannot perform large-area batch seeding operation and has the problem of low land utilization rate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the existing double-belt seeding monomer can not perform large-area batch seeding operation and has low land utilization rate. Further provides a double-strip air-suction type cultivating, fertilizing and seeding machine.

The technical scheme of the utility model is that: a double-strip air-suction type cultivating, fertilizing and seeding machine comprises a frame assembly and a plurality of double-sowing single bodies, wherein the double-sowing single bodies are arranged on the frame assembly side by side; each double-belt seeding monomer comprises a seed box, a seed sowing device, a seed guiding pipe, a depth limiting mechanism, a rack, a pressing and earthing mechanism and two sets of ditching mechanisms; the relative circumference of two kind on the seed dish on the seed metering ware is installed or the dislocation is installed equally, seed metering ware and two sets of ditching mechanisms set up in the frame, the seed case sets up in the top of seed metering ware and with the access connection of seed metering ware, two sets of ditching mechanisms set up in the below of seed metering ware and the interval can be adjusted, respectively be equipped with a seed guide pipe on every ditching mechanism of group, the seed guide pipe sets up in the below of seed metering ware, and the entry of seed guide pipe is just right with the seed metering mouth of seed metering ware, suppression earthing mechanism sets up at the rear of seed metering ware and articulated with the frame, depth-limiting mechanism sets up between two sets.

The fertilizing disc is arranged at the lower end of the rack assembly, the fertilizer box assembly is arranged at the upper end of the rack assembly and provides fertilizer for the fertilizing disc, each double-belt seeding unit corresponds to one fertilizing disc, the fan assembly is arranged on the rack assembly and provides air suction power for the double-belt seeding units.

Furthermore, the fertilization disc comprises a fertilization colter mounting seat, a fertilization spring handle, a fertilization disc mounting seat and a fertilization disc, the fertilization disc is mounted on the fertilization disc mounting seat, the lower end of the fertilization spring handle is connected with the fertilization disc mounting seat, and the fertilization colter mounting seat is mounted at the upper end of the fertilization spring handle.

Further, the land wheel assembly comprises a rubber tire, a land wheel frame, a chain rotating assembly and a chain box, wherein the rubber tire is installed on the land wheel frame, one end of the chain rotating assembly is installed on the rubber tire, and the chain box covers the land wheel frame.

Furthermore, each group of ditching mechanisms comprises a connecting shaft, a connecting plate and two ditching discs; the two ditching disks are arranged on the connecting shaft at a certain angle and can rotate, the connecting shaft is fixedly connected with a connecting plate, the connecting plate is fixed on the rack, the distance between the two connecting plates on the two ditching mechanisms can be adjusted, the two ditching disks on the two ditching mechanisms are symmetrically distributed on the rack, and each seed guide pipe is fixed on each connecting plate.

Furthermore, the depth limiting mechanism of the double-belt sowing single body comprises a depth limiting wheel, an adjusting handle, a connecting rod I, a hinged shaft, a hinged rod and a depth limiting wheel shaft; the depth wheel is arranged on a depth wheel shaft, the depth wheel is positioned between the two sets of ditching mechanisms, two ends of a hinged rod are hinged with the depth wheel shaft and the rack respectively, an adjusting handle is arranged on the rack and can rotate, a threaded hole matched with the adjusting handle is machined in the side face of the hinged shaft, the adjusting handle is screwed on the threaded hole, a connecting rod I is hinged on the rack, one end of the connecting rod I is hinged on the hinged shaft, and the other end of the connecting rod I is tightly attached to the hinged rod.

Furthermore, the pressing and earthing mechanism comprises a rotating shaft, a connecting plate I, two pressing wheels, an extension spring and a pressing wheel adjusting screw; two press wheels set up at the both ends of pivot and can rotate, it has connecting plate I to articulate between frame and the pivot, processing have on the connecting plate I with press wheel adjusting screw complex hole, and extension spring's one end rigid coupling has the nut, extension spring's the other end with the frame is connected, and press wheel adjusting screw passes the hole on connecting plate I and revolves soon on extension spring's nut.

Further, the double-belt seeding single body also comprises an auxiliary device; the auxiliary device comprises an upper floating rod, a lower floating rod, a fixed body, a tension adjusting device, a floating roller, a floating swing rod and a tension spring II; one end of the upper floating rod and one end of the lower floating rod are respectively hinged with the frame, a floating roller is arranged on the floating swing rod, an extension spring II is arranged between the end part of the floating swing rod and the fixed body, the other end of the upper floating rod, the other end of the lower floating rod and the floating swing rod are respectively hinged with the fixed body, and a tension adjusting device is arranged between the upper floating rod and the lower floating rod.

Compared with the prior art, the utility model has the following effect:

1. the utility model discloses a seed metering ware is double kind of a dish structure of air suction, through changing two relative circumference of two kind dish A-1 on the seed metering ware 2 and going up the hole and installing or dislocation mounting, can guarantee to sow accurately, can realize parallel two seedling areas again when two kinds of the relative circumference of dish are installed equally, when two kinds of dish dislocation mounting, two seedling areas can realize "crutch seedling" or "article word seedling". By replacing the seeding trays with different apertures and hole numbers, various crops such as soybean, corn, small-grain soybean, sorghum, pelletized beet, mung bean, small-grain, red bean, small-grain, oil sunflower, sunflower seeds with the length of 10-20, pumpkin seeds, kidney beans, partial traditional Chinese medicinal materials and the like can be sown. The utilization rate of the land is effectively improved from 10 ten thousand seedlings to 16 ten thousand seedlings per mu of land.

2. The utility model discloses a seeder complete machine compact structure, rationally distributed, fertilization and depth of planting are adjustable, and fertilization volume and seeding volume are adjustable. The machine is connected with a tractor with a lifting device and a three-point suspension device, and a cardan shaft or a hydraulic motor can be adopted to provide power for a fan. Can be used for large-area batch seeding operation.

Drawings

Fig. 1 is a side view of the present invention. Fig. 2 is a front view of fig. 1. Fig. 3 is an isometric view of fig. 1. FIG. 4 is an isometric view of the present invention; FIG. 5 is a front view of the present invention; FIG. 6 is a right side view of the present invention; FIG. 7 is a schematic view of the trenching assembly 7; FIG. 8 is a schematic view of the depth stop mechanism 4; fig. 9 is a schematic view of the compacting and casing mechanism 6; FIG. 10 is a left side view of FIG. 6; fig. 11 is a schematic view of the auxiliary device 8. Fig. 12 is a schematic structural view of the fertilization disk 101. Fig. 13 is a schematic structural view of the land wheel assembly 104.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 13, and the double-strip air-suction type cultivation, fertilization and seeding machine of the embodiment comprises a frame assembly 100 and a plurality of double-sowing single bodies a, wherein the double-sowing single bodies a are arranged on the frame assembly 100 side by side; each double-belt seeding monomer A comprises a seed box 1, a seed sowing device 2, a seed guiding pipe 3, a depth limiting mechanism 4, a frame 5, a pressing and earthing mechanism 6 and two sets of ditching mechanisms 7; the relative circumference of two kind of dish A-1 on the seed metering ware 2 on goes up the kind of a hole is installed or the dislocation is installed equally, seed metering ware 2 and two sets of ditching mechanisms 7 set up in frame 5, seed case 1 sets up in seed metering ware 2 the top and with seed metering ware 2 access connection, two sets of ditching mechanisms 7 set up in seed metering ware 2 the below and the interval can be adjusted, respectively be equipped with a seed guide pipe 3 on every ditching mechanism 7 of group, seed guide pipe 3 sets up in seed metering ware 2 the below, and seed guide pipe 3's entry is just right with seed metering 2's seed metering mouth, suppression earthing mechanism 6 sets up at seed metering ware 2 the rear and is articulated with frame 5, depth-limiting mechanism 4 sets up between two sets of ditching mechanisms 7.

The seed metering device of the embodiment has a suction double-row seed plate structure, can ensure accurate seeding, can realize double seedling belts, and can realize 'crutch seedlings' and 'pin-shaped seedlings' in the double seedling belts. By changing the sowing trays with different apertures and hole numbers, various crops such as soybean, corn, small-grain soybean, sorghum, pelletized beet, mung bean (large, small-grain small, oil sunflower, sunflower with length between 10 and 20), pumpkin seed, kidney bean and partial traditional Chinese medicinal materials can be sown.

The seed sowing device of the embodiment adopts the design of independent double negative pressure cavities, double seed trays, double seed picking devices and common seed chamber and common transmission devices; the seed dropping point positions of the double-disc seed dropping device are respectively in one-to-one correspondence with seed guiding pipes, the center distance of the seed guiding pipes is 125mm, each seed guiding pipe is respectively in one-to-one correspondence with a group of independent double-disc ditching components, and the joint distance of the two groups of double discs is 125 mm. The profiling depth limiting wheel is positioned below the seed sowing device, and the depth of the two groups of independent double-disc ditching components can be adjusted. The structural layout design avoids 100% that the profile modeling depth limiting wheels fall off from the ridge platforms in the process of sowing operation, so that the conditions of inconsistent sowing depth and the like are avoided to the maximum extent, and the structural layout design is particularly prominent in small ridges, namely sowing operation of 500-700 mm. The seed tray can realize simultaneous or differential seed throwing at two seed throwing positions by changing the installation phase angle, and transverse common line or staggered bent seedlings of two adjacent seedlings in two seedling belts can be accurately realized. When the seeds adsorbed on the two seed trays are poor or thrown through the same phase angle of the seed throwing positions, the seeds fall along a preset seed throwing track by means of self weight and inertia, and no collision friction or contact is generated between the seeds and any object or surface in the process, so that the high plant spacing accuracy and stability of the double-strip machine are higher than those of the traditional double-strip machine.

The seed guiding form of the embodiment is non-contact throwing along the seed throwing track, the planting distance is accurate and stable, the precision of the seed throwing moment is kept to the maximum extent, all external influences and interferences on the track path are avoided, and the extremely high precision of the planting distance can be achieved, wherein the main influencing factors are the seed volume or the weight difference, the actual soil preparation condition and the like.

The second embodiment is as follows: the embodiment is described with reference to fig. 1 to 3, 12 and 13, and further includes fertilizing discs 101, a transmission assembly 102, a marker assembly 103, a land wheel assembly 104, a fan assembly 105 and a fertilizer box assembly 106, wherein the marker assembly 103 is installed at two ends of the frame assembly 100, the land wheel assembly 104 is installed in the middle of the frame assembly 100, the land wheel assembly 104 is installed on the frame assembly 100 and provides transmission power for the transmission assembly 102, the fertilizing discs 101 are installed at the lower end of the frame assembly 100, the fertilizer box assembly 106 is installed at the upper end of the frame assembly 100 and provides fertilizer for the fertilizing discs 101, each dual-sowing unit a corresponds to one fertilizing disc 101, and the fan assembly 105 is installed on the frame assembly 100 and provides air suction power for the dual-sowing unit a. So set up, be convenient for form a seeder is whole to realize the batch seeding operation. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 3 and 12, the fertilization disk 101 of the present embodiment comprises a fertilization furrow opener mounting seat 101-1, a fertilization spring handle 101-2, a fertilization disk mounting seat 101-3 and a disk body 101-4, the disk body 101-4 is mounted on the fertilization disk mounting seat 101-3, the lower end of the fertilization spring handle 101-2 is connected with the fertilization disk mounting seat 101-3, and the fertilization furrow opener mounting seat 101-1 is mounted at the upper end of the fertilization spring handle 101-2. So set up, according to needs bilateral symmetry configuration, its function is ditching, with fertilizer application in soil according to the position of agronomy requirement. Other components and connection relationships are the same as those in the second embodiment.

The fourth concrete implementation mode: referring to fig. 1 to 3 and 13, the land wheel assembly 104 of the present embodiment includes a rubber tire 104-1, a land wheel frame 104-2, a chain rotating assembly 104-3 and a chain case 104-4, wherein the rubber tire 104-1 is mounted on the land wheel frame 104-2, one end of the chain rotating assembly 104-3 is mounted on the rubber tire 104-1, and the chain case 104-4 covers the land wheel frame 104-2. So set up, support the complete machine and transmit power. Other compositions and connection relations are the same as those of the third embodiment.

The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 to 7, and each set of ditching mechanism 7 of the embodiment comprises a connecting shaft 7-1, a connecting plate 7-2 and two ditching disks 7-3; the two ditching disks 7-3 are arranged on the connecting shaft 7-1 in a certain angle and can rotate, the connecting shaft 7-1 is fixedly connected with a connecting plate 7-2, the connecting plate 7-2 is fixed on the rack 5, the distance between the two connecting plates 7-2 on the two ditching mechanisms 7 can be adjusted, the two ditching disks 7-3 on the two ditching mechanisms 7 are symmetrically distributed on the rack 5, and each seed guide pipe 3 is fixed on each connecting plate 7-2. According to the arrangement, the spacer 7-4 is arranged between each connecting plate 7-2 and the rack 5, and the adjustment of the distance between the two connecting plates 7-2 is realized by adjusting the thickness of the spacer 7-4, so that the adjustment of the distance between the two rows of seeds is realized. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The seed metering device structure of the embodiment adopts double air cavities and double seed trays, and has the following advantages: 1. the pressure of the two air cavities is balanced, and 2. the two discs can ensure the consistent seed feeding linear speed. 3. Can accurately realize seed synchronization or crutch arrangement. 4. The two seedling belts can realize sowing with different plant distances. 5. Also can realize single seedling with offset seeding.

The sixth specific implementation mode: the depth-limiting mechanism 4 of the double-belt sowing monomer A of the embodiment is described with reference to FIG. 8, and comprises a depth-limiting wheel 4-1, an adjusting handle 4-3, a connecting rod I4-4, a hinge shaft 4-5, a hinge rod 4-8 and a depth-limiting wheel shaft 4-9; the depth wheel 4-1 is arranged on a depth wheel shaft 4-9, the depth wheel 4-1 is positioned between the two sets of ditching mechanisms 7, two ends of a hinged rod 4-8 are respectively hinged with the depth wheel shaft 4-9 and the rack 5, an adjusting handle 4-3 is arranged on the rack 5 and can rotate, a threaded hole matched with the adjusting handle 4-3 is processed on the side surface of the hinged shaft 4-5, the adjusting handle 4-3 is screwed on the threaded hole, a connecting rod I4-4 is hinged on the rack 5, one end of the connecting rod I4-4 is hinged on the hinged shaft 4-5, and the other end of the connecting rod I4-4 is tightly attached to the hinged rod 4-8. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The position of the profiling depth limiting wheel of the embodiment is positioned between the two groups of ditching discs, and the profiling depth limiting wheel has the following advantages: 1. the single-wheel profiling depth-limiting pressure is large, the soil moisture preservation performance is good 2, the single bodies are prevented from falling off the kang 3 from the ridge platform by 100% arrangement in the middle, the backfilling and compacting effects on the fertilizer ditches can be realized 4, the wheel ends and the advancing direction have no inclination angle, the passing performance is better 5, and the backfilling and soil covering effects on the seed ditches in the two seedling belts can be realized simultaneously.

The seventh embodiment: the embodiment is described with reference to fig. 9 and 10, and the compacting and soil covering mechanism 6 of the embodiment comprises a rotating shaft 6-1, a connecting plate I6-2, two compacting wheels 6-3, an extension spring 6-4 and a compacting wheel adjusting screw 6-5; two press wheels 6-3 are arranged at two ends of a rotating shaft 6-1 and can rotate, a connecting plate I6-2 is hinged between the rack 5 and the rotating shaft 6-1, a hole matched with a press wheel adjusting screw 6-5 is processed on the connecting plate I6-2, a nut is fixedly connected to one end of an extension spring 6-4, the other end of the extension spring 6-4 is connected with the rack 5, and the press wheel adjusting screw 6-5 penetrates through the hole in the connecting plate I6-2 and is screwed on the nut of the extension spring 6-4. So set up, bury the seed that fills in the kind ditch in the soil and consolidate. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The inner profiling wheel, namely the profiling wheel in the double-belt sowing monomer A is positioned on the inner side structures of the two groups of ditching discs, the independent double-disc ditching structure and the V-shaped pressing mechanism with adjustable angle and pressure, the through performance is good, the consistency of sowing depth is good, the ditching width is narrow, the soil moisture conservation is good, the plant spacing accuracy is high, the phenomena of 'ridge gnawing' and ridge pressing platforms and the like are avoided, double-strip precision sowing operation can be carried out on original stubble lands or cultivated standard ridges of 60-70 cm, and through changing working parts and changing the installation mode, no-tillage sowing can be carried out, and sowing after tillage can be carried out; can be used for ridge planting and flat planting.

The specific implementation mode is eight: the present embodiment will be described with reference to fig. 11, and the double-seeded single seed a of the present embodiment further includes an auxiliary device 8; the auxiliary device 8 comprises an upper floating rod 8-1, a lower floating rod 8-2, a fixed body 8-3, a tension adjusting device 8-4, a floating roller 8-5, a floating swing rod 8-6 and a tension spring II 8-7; one end of the upper floating rod 8-1 and one end of the lower floating rod 8-2 are respectively hinged with the frame 5, a floating roller 8-5 is arranged on the floating swing rod 8-6, a tension spring II8-7 is arranged between the end part of the floating swing rod 8-6 and the fixed body 8-3, the other end of the upper floating rod 8-1, the other end of the lower floating rod 8-2 and the floating swing rod 8-6 are respectively hinged with the fixed body 8-3, and a tension adjusting device 8-4 is arranged between the upper floating rod 8-1 and the lower floating rod 8-2. So set up, make the soil on the ridge platform more level and more smooth to guarantee seeding quality. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.

The present invention is not described in detail in the prior art.

The utility model discloses a theory of operation is:

a plurality of double-belt sowing monomers A are installed on a rack assembly 100, a fixing body 8-3 on an auxiliary device 8 moves forwards under the dragging of a tractor, ditching disks 7-3 are pressed into soil of a ridge under the supporting of an extension spring I8-4-1 and a depth limiting wheel 4-1, two groups of ditching disks 7-3 are used for ditching seed furrows after the ridge is rolled and leveled by floating rollers 8-5, seeds discharged by a seed sowing device 2 fall into the seed furrows, and at the moment, two press wheels 6-3 behind the seed sowing device 2 are used for covering and compacting the soil on the seed furrows to complete sowing. By changing the relative circumferential equal installation or staggered installation of the seed holes on the two seed plates A-1 on the seed sowing device 2, the precise seeding can be ensured, when the two seed plates are installed in the relative circumferential equal way, the parallel double seedling belts can be realized, and when the two seed plates are installed in the staggered way, the double seedling belts can realize the 'crutch seedling' or the 'T-shaped seedling'.

Claims

1. The utility model provides a two air-suction type cultivates fertilizing and seeding machines, it includes frame assembly (100), its characterized in that: the double-sowing machine also comprises a plurality of double-sowing single bodies (A), wherein the double-sowing single bodies (A) are arranged on the rack assembly (100) side by side;

each double-belt seeding monomer (A) comprises a seed box (1), a seed sowing device (2), a seed guiding pipe (3), a depth limiting mechanism (4), a rack (5), a pressing and earthing mechanism (6) and two groups of ditching mechanisms (7); the utility model discloses a seed metering device, including seed metering device (2), seed metering device (2) and two sets of ditching mechanism (7), seed case (1) sets up in the top of seed metering device (2) and with the access connection of seed metering device (2), two sets of ditching mechanism (7) set up in the below of seed metering device (2) and the interval can be adjusted, respectively be equipped with one seed guide pipe (3) on every group ditching mechanism (7), seed guide pipe (3) set up in the below of seed metering device (2), and the entry of seed guide pipe (3) is just right with the seed metering mouth of seed metering device (2), suppression earthing mechanism (6) set up at the rear of seed metering device (2) and articulate with frame (5), depth-limiting mechanism (4) set up between two sets of ditching mechanism (7).

2. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 1, characterized in that: the fertilizing device is characterized by further comprising a fertilizing disc (101), a transmission assembly (102), a marker assembly (103), a land wheel assembly (104), a fan assembly (105) and a fertilizer box assembly (106), wherein the marker assembly (103) is installed at two ends of the rack assembly (100), the land wheel assembly (104) is installed in the middle of the rack assembly (100), the land wheel assembly (104) is installed on the rack assembly (100) and provides transmission power for the transmission assembly (102), the fertilizing disc (101) is installed at the lower end of the rack assembly (100), the fertilizer box assembly (106) is installed at the upper end of the rack assembly (100) and provides fertilizer for the fertilizing disc (101), each double-belt sowing single body (A) corresponds to one fertilizing disc (101), and the fan assembly (105) is installed on the rack assembly (100) and provides air suction power for the double-belt sowing single bodies (A).

3. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 2, characterized in that: the fertilization disc (101) comprises a fertilization furrow opener installation seat (101-1), a fertilization spring handle (101-2), a fertilization disc installation seat (101-3) and a disc body (101-4), the disc body (101-4) is installed on the fertilization disc installation seat (101-3), the lower end of the fertilization spring handle (101-2) is connected with the fertilization disc installation seat (101-3), and the fertilization furrow opener installation seat (101-1) is installed at the upper end of the fertilization spring handle (101-2).

4. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 3, characterized in that: the land wheel assembly (104) comprises a rubber tire (104-1), a land wheel frame (104-2), a chain rotating assembly (104-3) and a chain box (104-4), wherein the rubber tire (104-1) is installed on the land wheel frame (104-2), one end of the chain rotating assembly (104-3) is installed on the rubber tire (104-1), and the chain box (104-4) covers the land wheel frame (104-2).

5. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 1 or 4, characterized in that: each group of ditching mechanism (7) of the double-belt sowing single body (A) comprises a connecting shaft (7-1), a connecting plate (7-2) and two ditching discs (7-3); the two ditching disks (7-3) are arranged on the connecting shaft (7-1) at a certain angle and can rotate, the connecting shaft (7-1) is fixedly connected with a connecting plate (7-2), the connecting plate (7-2) is fixed on the rack (5), the distance between the two connecting plates (7-2) on the two sets of ditching mechanisms (7) can be adjusted, the two sets of ditching disks (7-3) on the two sets of ditching mechanisms (7) are symmetrically distributed on the rack (5), and each seed guide pipe (3) is fixed on each connecting plate (7-2).

6. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 5, characterized in that: the depth limiting mechanism (4) of the double-belt sowing single body (A) comprises a depth limiting wheel (4-1), an adjusting handle (4-3), a connecting rod I (4-4), a hinge shaft (4-5), a hinge rod (4-8) and a depth limiting wheel shaft (4-9); the depth limiting wheel (4-1) is arranged on a depth limiting wheel shaft (4-9), the depth limiting wheel (4-1) is located between the two sets of ditching mechanisms (7), two ends of a hinge rod (4-8) are respectively hinged with the depth limiting wheel shaft (4-9) and the rack (5), an adjusting handle (4-3) is arranged on the rack (5) and can rotate, a threaded hole matched with the adjusting handle (4-3) is processed in the side face of the hinge shaft (4-5), the adjusting handle (4-3) is screwed on the threaded hole, a connecting rod I (4-4) is hinged on the rack (5), one end of the connecting rod I (4-4) is hinged on the hinge shaft (4-5), and the other end of the connecting rod I (4-4) is tightly attached to the hinge rod (4-8).

7. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 6, characterized in that: the pressing and earthing mechanism (6) of the double-belt sowing single body (A) comprises a rotating shaft (6-1), a connecting plate I (6-2), two pressing wheels (6-3), an extension spring (6-4) and a pressing wheel adjusting screw (6-5); two press wheels (6-3) are arranged at two ends of a rotating shaft (6-1) and can rotate, a connecting plate I (6-2) is hinged between the rack (5) and the rotating shaft (6-1), a hole matched with a press wheel adjusting screw (6-5) is processed on the connecting plate I (6-2), a nut is fixedly connected with one end of an extension spring (6-4), the other end of the extension spring (6-4) is connected with the rack (5), and the press wheel adjusting screw (6-5) penetrates through the hole in the connecting plate I (6-2) and is screwed on the nut of the extension spring (6-4).

8. The double-strip air-suction type cultivating, fertilizing and seeding machine as claimed in claim 1 or 7, characterized in that: the double-belt sowing monomer (A) also comprises an auxiliary device (8); the auxiliary device (8) comprises an upper floating rod (8-1), a lower floating rod (8-2), a fixed body (8-3), a tension adjusting device (8-4), a floating roller (8-5), a floating swing rod (8-6) and a tension spring II (8-7); one end of the upper floating rod (8-1) and one end of the lower floating rod (8-2) are respectively hinged with the rack (5), a floating roller (8-5) is arranged on the floating swing rod (8-6), a tension spring II (8-7) is arranged between the end part of the floating swing rod (8-6) and the fixed body (8-3), the other end of the upper floating rod (8-1), the other end of the lower floating rod (8-2) and the floating swing rod (8-6) are respectively hinged with the fixed body (8-3), and a tension adjusting device (8-4) is arranged between the upper floating rod (8-1) and the lower floating rod (8-2).