CN211210467U - Double-impeller seed guiding device of internal suction type hole sowing seed sowing device - Google Patents

Abstract

The utility model relates to a double-impeller seed guiding device for an internal suction type hole seeding meter, belonging to the technical field of agricultural seeding, comprising a casing, a cover plate, an inner impeller, an outer impeller and a sealing plate. C-shaped baffle and retaining ring, the cover plate is provided with a fan-shaped gap, the inner impeller and the outer impeller are respectively located on the inner side of the C-shaped baffle and the retaining ring of the cover plate, the cover plate is provided with a seed inlet, and the cover plate is fixedly connected The seed feeding pipe is communicated with the seed feeding port, the outer side of the outer impeller is provided with a shaft sleeve, the transmission shaft is inserted into the shaft sleeve, the shaft sleeve is provided with a baffle ring, the baffle ring on the cover plate is provided with a gap, and the gap is provided with a gap. There is a guiding tube, and the inside of the retaining ring is connected with the guiding tube through a gap. The designed seed guiding device realizes the short-term clustering of multiple seeds successively twice. After sowing, the seeds have good cavitation in the field. It is stable and can also be used for fixed-distance sowing of a single seed in one hole.

Description

A dual-impeller seed guiding device of an internal suction type hole seed metering device

technical field

The utility model belongs to the technical field of agricultural seeding, and more particularly relates to a double-impeller seed guiding device of an internal suction type hole seed metering device.

Background technique

Precise hole direct seeding technology can accurately distribute the seeds in the field according to the required number of holes and hole spacing according to the planting requirements of crops, which can save the seeding amount, reduce the field management in the later stage, and help stabilize and increase yield. It is widely used in sowing fields of hole-sown crops such as corn and cotton.

According to the principle of seed metering, there are two main types of seed metering devices: mechanical and pneumatic. Among them, the seed guiding devices matched with the pneumatic seed metering device mainly include a seed guiding tube and an inverted parabolic seed guiding device. For crops sown in multiple holes, due to the inconsistency of the seeding time of the seed metering device, the individual differences between the seeds and the wall of the seed guide tube are large, and there is irregular vibration of the seeding machine in the field. The consistency of the soiling time of multiple seeds leads to a large coefficient of variation of the grain spacing in the hole, and the uniform stability of the hole diameter and the hole distance is poor.

Utility model content

1. Technical problems to be solved by the utility model

The purpose of the utility model is to solve the defects in the prior art that the time of seeding of the seed metering device is inconsistent, and the irregular vibration of the seeding machine in the field causes the uniformity and stability of the hole diameter and the distance between the holes. The double-impeller seed guide device, which meets the agronomic requirements for sowing multiple seeds in one hole, realizes the short-term clustering of multiple seeds for two consecutive times. Uniform and stable, it can also be used for fixed-distance sowing of a single seed in one hole.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the present utility model is:

The utility model discloses a double-impeller seed guiding device of an internal suction type hole seeding metering device, which comprises a casing, a cover plate, an inner impeller, an outer impeller and a sealing plate. The open end of the casing is fixedly connected with the sealing plate, and the sealing plate is The cover plate is fixedly connected, and the casing is provided with a transmission shaft. One end of the transmission shaft passes through the casing to connect the sprocket, and the other end passes through the cover to connect to the outer impeller. The inner impeller is located in the casing, and the transmission shaft passes through the center of the inner impeller and the inner impeller. Rotationally connected, the inner and outer sides of the cover plate are respectively provided with a C-shaped baffle plate and a retaining ring, the cover plate is provided with a fan-shaped gap, the inner impeller and the outer impeller are located on the inner side of the C-shaped baffle plate and the retaining ring of the cover plate, respectively. There is a seed inlet on the top, the cover plate is fixedly connected with a seed inlet pipe, the seed inlet pipe is connected with the seed inlet, the outer side of the outer impeller is provided with a shaft sleeve, the drive shaft is inserted into the shaft sleeve, the shaft sleeve is provided with a baffle ring, and the cover The baffle ring on the plate is provided with a gap, and the gap is provided with a guide pipe. The inside of the baffle ring is communicated with the guide pipe through the gap. A plurality of equally spaced arc-shaped partitions are distributed on the inner impeller and the outer impeller. The partitions and the arc-shaped partitions on the inner impeller correspond one by one, the surfaces between the adjacent arc-shaped partitions on the inner impeller are inclined surfaces, and the surfaces between the arc-shaped partitions on the outer impeller are flat surfaces.

Preferably, the arc-shaped baffle and the inclined surface on the inner impeller form a conical space, the arc-shaped baffle and the plane on the outer impeller form a rectangular space, and the distance from the bottom of the conical space to the transmission shaft is greater than the distance from the rectangular space to the transmission shaft .

Preferably, the inner impeller is provided with three pin holes, the outer impeller is provided with three pin posts, and the pin posts are connected with the pin holes by interference fit.

Preferably, a suction hole roller is arranged in the casing, the suction hole roller is coaxial with the casing, the suction hole roller is fixed on the transmission shaft, the suction hole roller, the sealing plate and the casing form a cavity, and a plurality of partitions are arranged in the cavity. Air block, a plurality of air blocking blocks divide the cavity into a large chamber and a small chamber, there are several air hole groups on the annular side wall of the suction hole drum, and the number of air hole groups is the same as that of the arc-shaped partitions of the inner impeller.

Preferably, the casing is provided with an air outlet pipe and an air inlet pipe, the air outlet pipe is communicated with the large chamber, and the air inlet pipe is communicated with the small chamber.

Preferably, the suction hole drum is sleeved with a socket eye ring, the socket eye ring is fixedly connected with the suction hole drum, the outer wall of the socket eye ring is fitted with the inner wall of the suction hole drum, and the socket eye ring is provided with a number of circular holes, the circular holes The number of air hole groups is the same, and the two are connected in one-to-one correspondence, and the cover plate, the socket ring and the suction hole roller together form the seed holding cavity.

Preferably, a baffle ring is provided on the outer side of the outer impeller, the baffle ring is fixedly connected to the outer impeller through bolts, and a plurality of baffles bent inward are arranged on the baffle ring, and the baffles are along the outer ring of the baffle ring. Arranged in a circle, the number of baffles is the same as the number of arc-shaped baffles of the inner impeller and one-to-one correspondence.

3. Beneficial effects

Compared with the prior art, the technical scheme provided by the present utility model has the following beneficial effects:

(1) A dual-impeller seed guiding device of an internal suction type hole-seeding device of the present invention comprises a casing, a cover plate, an inner impeller, an outer impeller and a sealing plate, and the open end of the casing is fixedly connected with the sealing plate, A cover plate is fixedly connected to the sealing plate. A transmission shaft is arranged in the casing. One end of the transmission shaft passes through the casing to connect the sprocket, and the other end passes through the cover to connect to the outer impeller. The inner impeller is located in the casing, and the transmission shaft passes through the center of the inner impeller. It is rotatably connected with the inner impeller. The inner and outer sides of the cover plate are respectively provided with a C-shaped baffle plate and a retaining ring. The cover plate is provided with a fan-shaped gap. , There is a seed inlet on the cover plate, the cover plate is fixedly connected to the seed inlet pipe, the seed inlet pipe is connected with the seed inlet, the outer side of the outer impeller is provided with a shaft sleeve, the drive shaft is inserted into the shaft sleeve, and the shaft sleeve is provided with a baffle plate Ring, the baffle ring on the cover plate is provided with a gap, the gap is provided with a guide pipe, the inside of the baffle ring is communicated with the guide pipe through the gap, and a plurality of equally spaced arc baffles are distributed on the inner impeller and the outer impeller. The arc-shaped baffles on the inner impeller correspond one-to-one with the arc-shaped baffles on the inner impeller. The surface between the adjacent arc-shaped baffles on the inner impeller is an inclined plane, and the surface between the arc-shaped baffles on the outer impeller is a flat surface. This design The seed guiding device is composed of inner and outer impellers to form an independent seeding channel, which is in one-to-one correspondence with the stomata groups to ensure that multiple rice seeds that have been planted successively in each hole are put into the same seeding channel, and prevent the adjacent holes from being put into the same seeding channel. The phenomenon of tunneling during the seeding process, and the arc-shaped partitions are designed according to the movement trajectory of the seeds when the seed meter is used for seeding, which is conducive to reducing the movement and collision of the seeds in the inner impeller. Reduce the time for seeds to pass through the arc-shaped partitions, effectively prevent the situation that some seeds cannot reach the outer impeller when multiple seeds slide down, and avoid the defects of airdrops and stuck seeds.

(2) The double-impeller seed guiding device of an internal suction type hole-seeding device of the present invention, the inner impeller is provided with three pin holes, the outer impeller is provided with three pin posts, and the pin posts and the pin holes are connected by interference fit, This design makes the rotation speed of the inner impeller and the outer impeller exactly the same, and the stability of the triangle formed by the three pin holes makes the arc-shaped partitions of the inner impeller and the outer impeller not staggered with each other when they rotate, avoiding the jam phenomenon.

Description of drawings

Fig. 1 is the structural representation of a kind of internal suction type hole seed metering device double impeller seed guiding device of the present invention;

2 is a schematic structural diagram of a cover plate of a dual-impeller seed guiding device of an internal suction type hole-seeding metering device of the present invention;

3 is a schematic diagram of the back structure of the cover plate of the double-impeller seed guiding device of an internal suction type hole seeding metering device of the present invention;

4 is a schematic structural diagram of the inner impeller of the double impeller seed guiding device of an internal suction type hole seeding metering device of the present invention;

5 is a schematic structural diagram of the outer impeller of the double-impeller seed guiding device of an internal suction type hole seeding metering device of the present invention;

6 is a schematic structural diagram of the back of the outer impeller of the double-impeller seed guiding device of an internal suction type hole seeding metering device of the present invention;

7 is a schematic structural diagram of a cavity of a dual-impeller seed guiding device of an internal suction type hole seeding and metering device of the present invention;

Fig. 8 is a schematic diagram of the position structure of the air blocking block of the double impeller seed guiding device of an internal suction type hole seed metering device of the present invention;

9 is a perspective view of a dual-impeller seed guiding device of an internal suction type hole seeding metering device of the present invention;

Fig. 10 is a schematic diagram of the assembly structure of a double impeller seed guiding device of an internal suction type hole seed metering device of the present invention.

Description of the labels in the diagram:

100, housing; 110, transmission shaft; 120, sprocket; 130, inner impeller; 131, pin hole; 132, arc baffle; 133, inclined plane; 140, suction hole roller; 141, air hole group; 150, empty Cavity; 151, large chamber; 152, small chamber; 160, air barrier; 170, socket ring; 171, round hole; 181, air inlet pipe; 182, outlet pipe;

200, cover plate; 210, outer impeller; 211, pin; 212, shaft sleeve; 213, plane; 220, retaining ring; 221, seed inlet; 222, notch; 230, seed inlet pipe; 240, guide pipe; 250, fan-shaped notch; 260, C-shaped baffle;

300, sealing plate;

400, baffle ring; 410, baffle

500. Seed cavity.

Detailed ways

In order to facilitate the understanding of the present utility model, the present utility model will be more fully described below with reference to the relevant drawings, in which several embodiments of the present utility model are given, however, the present utility model can be realized in many different forms, They are not limited to the embodiments described herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it may be be directly connected to another element or intervening elements may be present; the terms "vertical", "horizontal", "left", "right" and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention; the terms used herein in the description of the present invention are only used to describe specific The examples are not intended to limit the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to Figures 1-10, a dual-impeller seed guiding device for an internal suction type hole seeding and metering device in this embodiment includes a casing 100, a cover plate 200, an inner impeller 130, an outer impeller 210 and a sealing plate 300. The open end of the body 100 is fixedly connected with the sealing plate 300, the sealing plate 300 is fixedly connected with the cover plate 200, the casing 100 is provided with a transmission shaft 110, one end of the transmission shaft 110 passes through the casing 100 to externally connect the sprocket 120, and the other end The outer impeller 210 is connected to the outer impeller 210 through the cover plate 200. The inner impeller 130 is located in the casing 100. The transmission shaft 110 passes through the center of the inner impeller 130 and is rotatably connected to the inner impeller 130. The inner and outer sides of the cover plate 200 are respectively provided with C-shaped baffles 260. and the baffle ring 220, the cover plate 200 is provided with a fan-shaped gap 250, the inner impeller 130 and the outer impeller 210 are respectively located on the inner side of the C-shaped baffle 260 and the baffle ring 220 of the cover plate 200, and the cover plate 200 is provided with a seed inlet 221 , the cover plate 200 is fixedly connected to the seed feed pipe 230, the seed feed pipe 230 is communicated with the seed feed port 221, the outer impeller 210 is provided with a shaft sleeve 212, the transmission shaft 110 is inserted into the shaft sleeve 212, and the shaft sleeve 212 is provided with a baffle plate Ring 400, the baffle ring 220 on the cover plate 200 is provided with a gap 222, the gap 222 is provided with a guide pipe 240, the interior of the baffle ring 220 is communicated with the guide pipe 240 through the gap 222, and the inner impeller 130 and the outer impeller 210 are distributed with a plurality of The arc-shaped baffles 132 at equal intervals, the arc-shaped baffles 132 on the outer impeller 210 and the arc-shaped baffles 132 on the inner impeller 130 are in one-to-one correspondence, and the surface between the adjacent arc-shaped baffles 132 on the inner impeller 130 is The surface between the inclined plane 133 and the arc-shaped partition plate 132 on the outer impeller 210 is the plane 213. If the seed guiding device of this design is not adopted, the pneumatic seed metering device on the market is adopted. The seed guide device mainly includes a seed guide tube and an inverted parabolic seed guide device. For crops sown in multiple holes, due to the inconsistency of the seeding time of the seed metering device, the individual differences between the seeds and the wall of the seed guide tube are large, and there is irregular vibration of the seeding machine in the field. The planting time of multiple seeds is consistent, but the seed guiding device of this design is adopted, and the height of the seeds is reduced through the cooperation of the inner and outer impellers 210, which improves the consistency of the soiling time of multiple seeds in one hole, and ensures the discharge of the seeds. Seed cavitation and hole spacing uniformity, the outer impeller 210 and the end surface of the inner impeller 130 form a "pocket"-shaped space to ensure the consistency and accumulation of seeds, and the inner and outer enclosure plates surround the inner impeller 130 and the outer impeller 210 to prevent the seeds from slipping.

In this embodiment, the arc-shaped baffle 132 and the inclined surface 133 on the inner impeller 130 form a conical space, the arc-shaped baffle 132 and the plane 213 on the outer impeller 210 form a rectangular space, and the distance from the bottom of the conical space to the transmission shaft 110 When the distance from the rectangular space to the transmission shaft 110 is greater than the distance from the rectangular space, the structure of this design does not require additional installation of guiding or transmission devices. The seeds slide in the conical space and slide down into the rectangular space along the inclined plane 133 .

In this embodiment, the inner impeller 130 is provided with three pin holes 131, and the outer impeller 210 is provided with three pin columns 211. The pin columns 211 are connected with the pin holes 131 by interference fit. If the pin holes 131 and the pin columns 211 are not provided, the inner The rotation of the impeller 130 and the outer impeller 210 cannot be completely synchronized, and the arc-shaped partitions 132 are staggered during rotation, which is likely to cause jamming. This design makes the rotation speed of the inner impeller 130 and the outer impeller 210 completely consistent, and three pin holes 131 are formed. The stability of the triangle shape ensures that the arc-shaped partitions 132 of the inner impeller 130 and the outer impeller 210 do not stagger with each other when they rotate, thereby avoiding the jamming phenomenon.

The casing 100 of this embodiment is provided with a hole-sucking roller 140 , the hole-absorbing roller 140 is coaxial with the casing 100 , the hole-absorbing roller 140 is fixed on the transmission shaft 110 , and the hole-absorbing roller 140 , the sealing plate 300 and the casing 100 are formed Cavity 150, a plurality of air blocking blocks 160 are arranged in the cavity 150, the plurality of air blocking blocks 160 divide the cavity 150 into a large chamber 151 and a small chamber 152, and the annular side wall of the suction hole roller 140 is provided with Several air hole groups 141, the number of air hole groups 141 is the same as that of the arc-shaped partitions 132 of the inner impeller 130. In this design structure, each group of air hole groups 141 adsorbs several seeds, and the seeds are transferred to small particles with the rotation of the suction hole drum 140. Near the chamber 152, when the further rotation reaches below the small chamber 152, the adsorption force disappears, and the seeds slide down between the partitions of the inner impeller 130. Since the number of air holes 141 is the same as the number of the arc-shaped partitions 132 of the inner impeller 130, therefore Each group of seeds can correspondingly slide down between each arc-shaped partition 132 of the inner impeller 130, and the seeding spacing is the same.

The housing 100 of this embodiment is provided with an air outlet pipe 182 and an air inlet pipe 181. The air outlet pipe 182 communicates with the large chamber 151, and the air intake pipe 181 communicates with the small chamber 152. In this designed structure, the air inlet pipe 181 communicates with the small chamber. 152 is connected, the direction of airflow in the small chamber 152 is from outside to inside, the seeds adsorbed on the suction hole roller 140 below the small chamber 152 are blown out and slide down by the air flow, the air outlet pipe 182 is communicated with the large chamber 151, and the large cavity The airflow direction in the chamber 151 is from the inside to the outside, and the seeds adsorbed on the air hole group 141 on the suction roller 140 in the large chamber 151 are adsorbed on the air holes by the air flow to avoid slipping.

The hole suction roller 140 in this embodiment is sleeved with a socket ring 170, the socket ring 170 is fixedly connected with the hole suction roller 140, the outer wall of the socket ring 170 is attached to the inner wall of the hole suction roller 140, and the socket ring 170 is provided with There are several round holes 171, the round holes 171 and the air hole group 141 have the same number, and the two are connected one by one. Seeds, the number of holes 171 on the socket ring 170 is the same as the number of holes 141 on the suction roller 140. Each hole 171 corresponds to a group of holes 141, and the holes 141 are located at the center of the hole 171. The structure ensures that the number of seeds in each group is the same during subsequent sowing, and the sowing effect is good.

A baffle ring 400 is provided on the outer side of the outer impeller 210 in this embodiment. The baffle ring 400 is fixedly connected to the outer impeller 210 by bolts. The baffle ring 400 is provided with a plurality of baffles 410 bent inward. Arranged along the circumference of the outer ring of the baffle ring 400, the number of the baffles 410 is the same as the number of the arc-shaped baffles 132 of the inner impeller 130 and is in one-to-one correspondence. When using this designed structure, the seeds pass through the guide tube after secondary accumulation. 240 slid down and gathered on the baffle 410 of the baffle ring 400, realizing the second short-term gathering of multiple seeds, and again with the rotation of the baffle ring 400, the multiple seeds fell together, realizing the second reduction of throwing. The height of the seed is improved, the consistency of the soiling time of multiple seeds in one hole is improved, and the uniformity of the seeding hole and the distance between the holes is ensured.

The method of using the double-impeller seed guiding device of the internal suction type hole-seeding and metering device in this embodiment provides power for the transmission shaft 110 from the external transmission mechanism, drives the transmission shaft 110 to rotate, and further drives the outer impeller 210 and the inner impeller. When the 130 rotates, the seeds between the partitions of the inner impeller 130 are transferred to the partitions of the outer impeller 210, and finally slide out from the guide tube 240 and fall.

During operation, the inner impeller 130, the outer impeller 210 and the baffle ring 400 all rotate synchronously with the transmission shaft 110, the seeds enter the inside of the seed metering device through the seed inlet pipe 230, the air inlet pipe 181 takes in air, the air outlet pipe 182 discharges air, and the airflow is circulated. The seeds are adsorbed on the air hole group 141 in the suction hole drum 140, and the adsorbed seeds follow the rotation of the suction hole drum 140 and the socket ring 170 and are transferred to the top of the seed metering device. Block the airflow, drop the seeds under gravity, and then enter between the arc-shaped partitions 132 of the inner impeller 130, and multiple seeds slide along the inclined surface 133 of the inner impeller 130 to the arc-shaped partitions 132 of the outer impeller 210, and then follow the arc-shaped partitions 132 of the outer impeller 210. With the rotation of the outer impeller 210, the seeds slide along the arc-shaped partition plate 132 of the outer impeller 210, and the seeds gather at the junction of the baffle ring 220 of the cover plate 200 and the arc-shaped partition plate of the outer impeller 210, realizing the first short-term accumulation of multiple seeds. , the arc-shaped partition of the outer impeller 210 reaches the guide tube 240, the seeds fall together, the inner and outer impellers 210 cooperate to reduce the height of the seed for the first time, and the seeds are collected by the guide tube 240 on the baffle 410 of the baffle ring 400 , to realize the second short-term clustering of multiple seeds, and again with the movement of the baffle ring 400, the multiple seeds fall together, the second time to reduce the seeding height, and to improve the consistency of the soiling time of multiple seeds in one hole , to ensure the uniformity of seeding hole formation and hole spacing.

The seed guiding device is not only suitable for crops that require multi-grain seeding in one hole, but also for crops that are sown in a single hole.

The above-mentioned embodiment only expresses a certain embodiment of the present invention, and its description is more specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention; For personnel, under the premise of not departing from the concept of the present utility model, several deformations and improvements can also be made, and these all belong to the protection scope of the present utility model; therefore, the protection scope of the present utility model patent should be based on the appended claims as allow.

Claims (7)

1. The utility model provides an internal suction formula bunch planting seed metering ware bilobed wheel seed guide device which characterized in that: the impeller type centrifugal compressor comprises a shell, a cover plate, an inner impeller, an outer impeller and a sealing plate, wherein the open end of the shell is fixedly connected with the sealing plate, the sealing plate is fixedly connected with the cover plate, a transmission shaft is arranged in the shell, one end of the transmission shaft penetrates through an external chain wheel of the shell, the other end of the transmission shaft penetrates through an external outer impeller of the cover plate, the inner impeller is positioned in the shell, the transmission shaft penetrates through the center of the inner impeller and is rotatably connected with the inner impeller, the inner side and the outer side of the cover plate are respectively provided with a C-shaped baffle plate and a baffle ring, the cover plate is provided with a seed inlet, the cover plate is fixedly connected with a seed inlet pipe, the seed inlet pipe is communicated with the seed inlet pipe, the outer side of the outer impeller is provided with a shaft sleeve, the transmission shaft is inserted into the shaft sleeve, the baffle ring is arranged on the shaft, the impeller is characterized in that a guide pipe is arranged at the notch, the inner part of the baffle ring is communicated with the guide pipe through the notch, a plurality of arc-shaped partition plates which are equally spaced are distributed on the inner impeller and the outer impeller, the arc-shaped partition plates on the outer impeller and the arc-shaped partition plates on the inner impeller are in one-to-one correspondence, the surfaces between the adjacent arc-shaped partition plates on the inner impeller are inclined planes, and the surfaces between the arc-shaped partition plates on the outer impeller are planes.

2. The internal suction type double-impeller seed guide device of the hill-drop seed sowing device as claimed in claim 1, wherein: the impeller is characterized in that the arc-shaped partition plate and the inclined plane on the inner impeller form a conical space, the arc-shaped partition plate and the plane on the outer impeller form a rectangular space, and the distance from the bottom of the conical space to the transmission shaft is greater than the distance from the rectangular space to the transmission shaft.

3. The internal suction type double-impeller seed guide device of the hill-drop seed sowing device as claimed in claim 1, wherein: the inner impeller is provided with three pin holes, the outer impeller is provided with three pin columns, and the pin columns are connected with the pin holes in an interference fit mode.

4. The internal suction type double-impeller seed guide device of the hill-drop seed sowing device as claimed in claim 1, wherein: the hole sucking device is characterized in that a hole sucking roller is arranged in the shell and is coaxial with the shell, the hole sucking roller is fixed on the transmission shaft, the hole sucking roller, the sealing plate and the shell form a cavity, a plurality of air isolating blocks are arranged in the cavity, the cavity is divided into a large cavity and a small cavity by the air isolating blocks, a plurality of air hole groups are arranged on the annular side wall of the hole sucking roller, and the number of the air hole groups is the same as that of the arc-shaped partition plates of the inner impeller.

5. The internal suction type double-impeller seed guide device of the hill-drop seed sowing device as claimed in claim 1, wherein: an air outlet pipe and an air inlet pipe are arranged on the shell, the air outlet pipe is communicated with the large cavity, and the air inlet pipe is communicated with the small cavity.

6. The internal suction type double-impeller seed guide device of the hill-drop seed sowing device as claimed in claim 4, wherein: the hole suction drum is internally sleeved with a hole nest ring, the hole nest ring is fixedly connected with the hole suction drum, the outer wall of the hole nest ring is attached to the inner wall of the hole suction drum, a plurality of round holes are formed in the hole nest ring, the number of the round holes is the same as that of the air hole groups, the round holes and the air hole groups are communicated in a one-to-one correspondence mode, and the cover plate, the hole nest ring and the hole suction drum form a seed accommodating cavity together.

7. The internal suction type double-impeller seed guide device of the hill-drop seed sowing device as claimed in claim 1, wherein: the outer side of outer impeller is equipped with the baffle ring, the baffle ring passes through bolt and outer impeller fixed connection, be equipped with a plurality of baffles of inwards buckling on the baffle ring, the baffle is arranged along the outer lane circumference of baffle ring, the quantity of baffle is the same and the one-to-one with the ARC baffle figure of interior impeller.

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