A straw returning and spreading device for improving bacterial application efficiency

Abstract

The present invention relates to the field of agricultural machinery technology, and specifically to a straw return and spreading device for improving the efficiency of bacterial application. It solves the problem that when returning straw to the field, the land is plowed and the crushed straw is mixed into the soil, and then the microbial agent is spread. The plowed soil is of different sizes and has uneven gaps, resulting in uneven distribution and penetration speed of the microbial agent in the soil after spreading, which leads to uneven straw composting progress and slow speed. A straw return and spreading device for improving the efficiency of bacterial application includes an assembly frame, a hanging ring is fixed to the top front end surface of the assembly frame, the assembly frame is assembled and connected to a rotary tiller through the hanging ring, and a motor fixing sleeve is fixed to one side of the bottom of the assembly frame. The present invention ensures that the straw composting progress remains consistent and improves the speed of straw composting by finely shearing the soil and the straw in the soil, and uniformly spraying the microbial agent into the soil while finely shearing.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a straw returning and spreading device for improving the efficiency of bacteria application. Background Art

[0002] Straw return to the field is a measure of returning straw to the fields. It is a measure to improve soil fertility and increase production that is widely valued in the world. While eliminating the air pollution caused by straw burning, it also has the effect of increasing fertilizer and yield. Straw return to the field can increase soil organic matter, improve soil structure, make the soil loose, increase porosity, reduce capacity, promote microbial activity and the development of crop roots. Straw return to the field can promote agricultural water conservation, cost savings, increased production and efficiency, and should also be given full attention in environmental protection and sustainable agricultural development. When returning straw to the field, it is often necessary to apply a certain amount of bacterial agents to the field to accelerate the composting of straw.

[0003] However, when returning straw to the field, the land is plowed and the crushed straw is mixed into the soil, and then the fungicide is applied. The plowed soil is of different sizes and the gaps are uneven, resulting in uneven distribution and penetration speed of the fungicide in the soil after application, which leads to uneven and slow straw composting progress. Therefore, it does not meet the existing needs. We have proposed a straw return and spreading device for improving the efficiency of fungicide application. Summary of the Invention

[0004] The purpose of the present invention is to provide a straw return and spreading device for improving the efficiency of bacterial application, so as to solve the problem proposed in the above background technology that during the straw return operation, the land is plowed and the crushed straw is mixed into the soil, and then the bacterial agent is spread. The plowed soil is of different sizes and the gaps are uneven, resulting in uneven distribution and penetration speed of the bacterial agent in the soil after application, thereby causing uneven straw composting progress and slow speed.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a straw returning and spreading device for improving the efficiency of sterilization, comprising an assembly frame, a hanging ring fixed to the top front end surface of the assembly frame, the assembly frame being assembled and connected to a rotary tiller via the hanging ring, a motor fixing sleeve fixed to one side of the bottom of the assembly frame, an output motor fixed inside the motor fixing sleeve, a drive spindle fixed to the output shaft end of the output motor, the drive spindle passing through the bottom end of the assembly frame, and an end of the drive spindle being rotatably connected to the assembly frame via a roller bearing;

[0006] A plurality of application mechanisms are installed on the outside of the driving main shaft, and the application mechanism includes two symmetrically distributed rotating rings, a fixed ring is provided between the two rotating rings, a fixed rod is fixed to the top of the fixed ring, and the top of the fixed rod is fixed to the bottom surface of the assembly frame, and a plurality of rotating support plates distributed in a circular array around the center of the circle are fixed to the inside of the bacterial agent application conduit, one end of the rotating support plate is fixed to the driving main shaft, both sides of the fixed ring are provided with an assembly ring groove, the inner side of the assembly ring groove is fixed with a fixed gear ring, and the surface of the rotating ring is provided with a plurality of positioning assembly holes distributed in a circular array, and a positioning plug rod is rotatably inserted in the middle of the positioning assembly hole, one end of the positioning plug rod extends to the inner side of the assembly ring groove and a transmission gear is fixed to the outer side of the end, and the transmission gear is meshed with the fixed gear ring, and a fixed disk is fixed to the other end of the positioning plug rod, the fixed disk is located outside the rotating ring and is in rotational contact with the outer surface of the rotating ring, and a plurality of thinning shear rods are fixed to the outer surface of the fixed disk, and the thinning shear rods are distributed in a circular array around the axis of the positioning plug rod.

[0007] Preferably, the thinning shear rods are distributed in a spiral shape around the axis of the positioning plug rod, and the cross section of the thinning shear rods is an equilateral triangle.

[0008] Preferably, the spiral directions of the thinning shear rods on two adjacent fixed disk surfaces facing each other are completely opposite, and the thinning shear rods on one fixed disk surface are located inside the thinning shear rods on the other fixed disk surface.

[0009] Preferably, a medicine storage box is detachably mounted on the upper surface of the assembly frame, a small high-pressure water pump is mounted on the bottom of the medicine storage box, a hose is fixed to the input end of the small high-pressure water pump, the top end of the hose passes through the bottom of the medicine storage box and extends to the inside of the medicine storage box, and an infusion tube is fixed to the output end of the small high-pressure water pump, the infusion tube passes through the assembly frame, the fixing rod and extends to the inside of the fixing ring.

[0010] Preferably, a first annular sealing shell and a second annular sealing shell are fixed inside the fixing ring, the axes of the first annular sealing shell and the second annular sealing shell coincide, and four connecting rods are fixed between the first annular sealing shell and the second annular sealing shell, and a sealing annular connecting plate is rotatably clamped between the two side edges of the first annular sealing shell and the second annular sealing shell, and the bottom end of the perfusion tube passes through the fixing ring and the first annular sealing shell.

[0011] Preferably, a through hole is provided at the center of the fixed disk, a microbial agent spreading conduit is inserted in the middle of the through hole, one end of the microbial agent spreading conduit passes through the positioning plug rod and passes through the sealing annular connecting plate, and one end of the microbial agent spreading conduit rotates with the sealing annular connecting plate and is flush with the inner surface of the sealing annular connecting plate.

[0012] Preferably, a plurality of high-pressure nozzles for applying the bacterial agent are distributed in a circular array on the outer surface of the bacterial agent applying conduit, and alloy sealing rings are provided between the sealing annular connecting plate and the first annular sealing shell and the second annular sealing shell.

[0013] Preferably, one end of the high-pressure nozzle for applying the microbial agent is inserted into the interior of the microbial agent applying conduit and the end is flush with the inner surface of the microbial agent applying conduit, and a solenoid valve is provided on the inner side of the outer end of the high-pressure nozzle for applying the microbial agent.

[0014] Preferably, the gap between the bacterial agent application high-pressure nozzle at the bottom of the bacterial agent application conduit located the lowest and the ground is five centimeters, and one-third of the fixed plate enters the ground.

[0015] Preferably, support wheels are detachably mounted on the bottom of the assembly frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention thins and shears the soil and the straw in the soil, and uniformly sprays a microbial agent into the soil during the thinning and shearing, thereby ensuring that the straw composting progress remains consistent and increasing the speed of straw composting;

[0018] 2. The present invention refines and crushes the soil by using adjacent and interlaced thinning shear rods, thereby increasing the softness of the soil and reducing the degree of crushing of the straw in the soil. At the same time, it ensures that the straw is distributed more evenly in the soil, making it easier for the applied microbial agent to penetrate into the soil and the straw to be more easily decomposed by the microbial agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0020] Figure 2 It is a structural schematic diagram of the release mechanism of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the rotating ring of the present invention;

[0022] Figure 4 is a cross-sectional view of a fixing ring of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the bacterial agent application catheter of the present invention;

[0024] Figure 6 This is a structural diagram of the positioning plug rod and the transmission gear of the present invention;

[0025] Figure 7 Schematic diagram of the thinning shear rod and the assembly structure of the thinning shear rod of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the support wheel of the present invention.

[0027] In the figure: 1. Assembly frame; 2. Medicine storage box; 3. Hanging ring; 4. Application mechanism; 401. Fixed ring; 402. Rotating ring; 403. Rotating support plate; 404. Fixed disk; 405. Inoculant application conduit; 406. Thinning shear rod; 407. Inoculant application high-pressure nozzle; 408. Insertion hole; 409. Positioning plug-in rod; 410. Transmission gear; 411. Assembly ring groove; 412. First annular sealing shell; 413. Second annular sealing shell; 414. Sealing annular connecting plate; 415. Alloy sealing ring; 416. Fixed gear ring; 417. Connecting rod; 418. Positioning assembly hole; 5. Infusion tube; 6. Motor fixing sleeve; 7. Output motor; 8. Driving spindle; 9. Fixed rod; 10. Support wheel. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1 As shown, a straw returning and spreading device for improving the efficiency of sterilization includes an assembly frame 1, a hanging ring 3 is fixed to the top front end surface of the assembly frame 1, the assembly frame 1 is assembled and connected to the rotary tiller through the hanging ring 3, a motor fixing sleeve 6 is fixed to the bottom side of the assembly frame 1, an output motor 7 is fixed inside the motor fixing sleeve 6, a driving spindle 8 is fixed to the output shaft end of the output motor 7, the driving spindle 8 passes through the bottom end of the assembly frame 1, and the end of the driving spindle 8 is rotatably connected to the assembly frame 1 through a roller bearing, and a support wheel 10 is detachably installed at the bottom of the assembly frame 1, and the support wheel 10 is used to support the assembly frame 1 to share the force of the fixing ring 401 to prevent the fixing ring 401 from being crushed due to excessive force.

[0030] like Figures 2 to 7As shown, multiple application mechanisms 4 are installed on the outside of the driving main shaft 8. The application mechanism 4 includes two symmetrically distributed rotating rings 402, a fixed ring 401 is provided between the two rotating rings 402, a fixed rod 9 is fixed on the top of the fixed ring 401, and the top of the fixed rod 9 is fixed to the bottom surface of the assembly frame 1. A plurality of rotating support plates 403 distributed in a circular array around the center of the circle are fixed to the inner side of the bacterial agent application conduit 405, one end of the rotating support plate 403 is fixed to the driving main shaft 8, both sides of the fixed ring 401 are provided with assembly ring grooves 411, and a fixed gear ring 416 is fixed to the inner side of the assembly ring groove 411. A plurality of positioning assembly holes 418 distributed in a circular array are provided on the surface of the rotating ring 402, and a positioning plug rod 409 is rotatably inserted in the middle of the positioning assembly hole 418. One end of the positioning plug rod 409 extends to the inner side of the assembly ring groove 411 and a transmission gear 410 is fixed to the outer side of the end portion. The transmission gear 410 is meshed with the fixed gear ring 416. The other end of the positioning plug rod 409 is fixed with a fixed plate 404, which is located outside the rotating ring 402 and in rotational contact with the outer surface of the rotating ring 402. A plurality of thinning shearing rods 406 are fixed to the outer surface of the fixed plate 404. The thinning shearing rods 406 are distributed in a circular array around the axis of the positioning plug rod 409. After the hanging ring 3 is docked with the rotary tiller, the output motor 7 drives the driving main shaft 8 and the rotating support plate 403 to rotate counterclockwise, so that the rotating support plate 403 drives the rotating ring 402, the positioning plug rod 409, and the fixed plate 404 to perform a circular motion counterclockwise around the axis of the fixed rod 9, so that the transmission gear 410 rolls against the inner side of the fixed gear ring 416, so that the fixed plate 404 drives the thinning shearing rod 406 to roll and contact the soil, and the rotating thinning shearing rod 406 is used to shear and thin the soil and the straw in the soil, and the thinning soil is more fluffy, which accelerates the penetration of the applied microbial agent and the contact speed of the straw.

[0031] The thinning shear rod 406 is distributed in a spiral shape around the axis of the positioning plug rod 409, and the cross-section of the thinning shear rod 406 is an equilateral triangle. The thinning shear rod 406 with an equilateral triangle cross-section rotates and contacts the soil, making it easier to penetrate the soil. The spiral directions of the thinning shear rods 406 on the surfaces of the two adjacent fixed disks 404 facing each other are completely opposite, and the thinning shear rod 406 on the surface of one fixed disk 404 is located on the inner side of the thinning shear rod 406 on the surface of the other fixed disk 404. The thinning shear rods 406 on the surfaces of the two adjacent fixed disks 404 facing each other form a sleeve structure. When the soil is thinned, the soil will pass through the gap between the thinning shear rods 406 with different rotation directions and spiral directions and the thinning shear rods 406. The thinning shear rods 406 on the surfaces of the two fixed disks 404 can refine the soil particles into smaller particles, making the soil more fluffy.

[0032] The upper surface of the assembly frame 1 is detachably mounted with a medicine storage box 2, a small high-pressure water pump is mounted at the bottom of the medicine storage box 2, a hose is fixed to the input end of the small high-pressure water pump, the top end of the hose passes through the bottom of the medicine storage box 2 and extends to the inside of the medicine storage box 2, and a perfusion medicine pipe 5 is fixed to the output end of the small high-pressure water pump. The perfusion medicine pipe 5 passes through the assembly frame 1 and the fixing rod 9 and extends to the inside of the fixing ring 401. The inside of the fixing ring 401 is fixed with a first annular sealing shell 412 and a second annular sealing shell 413, and the axes of the first annular sealing shell 412 and the second annular sealing shell 413 coincide with each other. , and four connecting rods 417 are fixed between the first annular sealed shell 412 and the second annular sealed shell 413, and sealed annular connecting plates 414 are rotatably clamped between the edges of the first annular sealed shell 412 and the second annular sealed shell 413. The bottom end of the perfusion tube 5 passes through the fixed ring 401 and the first annular sealed shell 412, and the microbial agent stored in the medicine storage box 2 is transported to the first annular sealed shell 412 and the second annular sealed shell 413 through the perfusion tube 5, which facilitates the application of the microbial agent when the soil and the straw in the soil are refined.

[0033] A through hole 408 is provided at the center of the fixed disk 404, and a microbial agent dispensing conduit 405 is inserted in the middle of the through hole 408. One end of the microbial agent dispensing conduit 405 passes through the positioning plug rod 409 and passes through the sealing annular connecting plate 414. One end of the microbial agent dispensing conduit 405 rotates with the sealing annular connecting plate 414 and is flush with the inner surface of the sealing annular connecting plate 414. A plurality of microbial agent dispensing high-pressure nozzles 407 are distributed in a circular array on the outer surface of the microbial agent dispensing conduit 405. The sealing annular connecting plate 414 is connected to the first annular sealing shell 412 and Alloy sealing rings 415 are provided between the second annular sealing shells 413, and the alloy sealing rings 415 are used to achieve sealing between the sealing annular connecting plate 414 and the first annular sealing shells 412 and the second annular sealing shells 413, so that the microbial agent delivered by the perfusion tube 5 into the space between the first annular sealing shells 412, the second annular sealing shells 413 and the sealing annular connecting plate 414 can only flow into the microbial agent application conduit 405 and be applied outward through the microbial agent application high-pressure nozzle 407 on the outer surface of the microbial agent application conduit 405.

[0034] One end of the high-pressure nozzle 407 for spreading the microbial agent is inserted into the inside of the microbial agent spreading conduit 405 and the end is flush with the inner surface of the microbial agent spreading conduit 405. A solenoid valve is provided on the inner side of the outer end of the high-pressure nozzle 407 for spreading the microbial agent. The gap between the high-pressure nozzle 407 for spreading the microbial agent at the bottom of the microbial agent spreading conduit 405, which is located at the lowest position, and the ground is five centimeters. One-third of the fixed plate 404 enters the ground, ensuring that the thinning shear rod 406 can plow the coating of sufficient depth, and during the plowing operation, the high-pressure nozzle 407 for spreading the microbial agent can spread the microbial agent normally and will not come into contact with the soil, thereby avoiding the high-pressure nozzle 407 for spreading the microbial agent being blocked by the soil.

[0035] Working principle: First, assemble the hanging ring 3 and the rotary tiller. After the assembly is completed, add the microbial agent to be applied into the medicine storage box 2. Then the operator drives the rotary tiller into the field where straw has been returned to the field. The operator drives the rotary tiller to pull the hanging ring 3 and the assembly frame 1 to move between the fields. During the movement, the output motor 7 is energized and started. After the output motor 7 is energized, it drives the driving shaft 8 and the rotating support plate 403 to rotate counterclockwise around the axis of the driving shaft 8. At this time, the rotating support plate 403 drives the rotating rings 402 on both sides of the fixed ring 401 to rotate around the axis of the driving shaft 8 when rotating.

[0036] The rotating ring 402 drives the positioning plug rod 409 to make a circular motion around the axis of the driving main shaft 8. At this time, the positioning plug rod 409 drives the fixed disk 404 and the thinning shear rod 406 to make a circular motion around the axis of the driving main shaft 8. At this time, the positioning plug rod 409 drives the transmission gear 410 to move in contact with the inner surface of the fixed gear ring 416. Since the transmission gear 410 is meshed with the fixed gear ring 416, the transmission gear 410 drives the positioning plug rod 409, the fixed disk 404 and the thinning shear rod 406 to move in contact with the inner surface of the fixed gear ring 416. The thinning shearing rods 406 rotate in a circle around the driving main shaft 8 along with the rotating ring 402 and contact the soil with one-third of it entering the soil. The thinning shearing rods 406 perform spiral shearing and thinning on the soil and the straw in the soil. At the same time, the thinning shearing rods 406 on the surfaces of the two facing fixed disks 404 rotate in different directions due to different spiral directions. When the thinning shearing rods 406 between the two fixed disks 404 intersect with each other, the soil is refined into smaller particles, making the soil more refined and fluffy, which can accelerate the time for the microbial agent to penetrate into the soil.

[0037] While the thinning shear rod 406 rotates to thin the soil, the small water pump at the bottom of the medicine storage box 2 extracts the microbial agent in the medicine storage box 2, and the microbial agent is sent into the space between the first annular sealing shell 412, the second annular sealing shell 413 and the sealing annular connecting plate 414 through the perfusion medicine pipe 5. The microbial agent enters the interior of the microbial agent application conduit 405 along the end of the microbial agent application conduit 405 that is flush with the sealing annular connecting plate 414. In the process of entering the interior of the microbial agent application conduit 405, the microbial agent application conduit 405 moves in a circular motion around the axis of the driving main shaft 8 at the same time as the fixed plate 404 and the positioning plug rod 409 and approaches the soil. When the microbial agent application conduit 405 moves to the bottom of the driving main shaft 8 along with the positioning plug rod 409, and at this time the angle between the axis of the microbial agent application conduit 405 and the axis of the driving main shaft 8 is less than fifteen degrees, the solenoid valve inside the microbial agent application high-pressure nozzle 407 on the surface of the microbial agent application conduit 405 is opened, and the agent inside the microbial agent application conduit 405 is sprayed into the soil being sheared and refined by the thinning shear rod 406 through the microbial agent application high-pressure nozzle 407, so that the microbial agent is evenly distributed in the soil and evenly contacts the straw. The even distribution of the microbial agent in the soil can ensure that the straw composting progress remains consistent and increase the speed of straw composting.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A straw returning and spreading device for improving the efficiency of sterilization, comprising an assembly frame (1), a hanging ring (3) fixed to the top front end surface of the assembly frame (1), and the assembly frame (1) is assembled and connected to a rotary tiller through the hanging ring (3), characterized in that: A motor fixing sleeve (6) is fixed to one side of the bottom of the assembly frame (1), an output motor (7) is fixed inside the motor fixing sleeve (6), a driving spindle (8) is fixed to the output shaft end of the output motor (7), the driving spindle (8) passes through the bottom end of the assembly frame (1), and the end of the driving spindle (8) is rotatably connected to the assembly frame (1) via a roller bearing; A plurality of dispensing mechanisms (4) are installed on the outer side of the driving main shaft (8), and the dispensing mechanism (4) comprises two symmetrically distributed rotating rings (402). A fixed ring (401) is provided between the two rotating rings (402). A fixed rod (9) is fixed to the top of the fixed ring (401), and the top of the fixed rod (9) is fixed to the bottom surface of the assembly frame (1). A plurality of rotating support plates (403) distributed in a circular array around the center of the rotating ring (402) are fixed to the inner side of the rotating ring (402), and one end of the rotating support plate (403) is fixed to the driving main shaft (8). Both sides of the fixed ring (401) are provided with an assembly ring groove (411), and a fixed gear ring (416) is fixed to the inner side of the assembly ring groove (411). The surface of the rotating ring (402) is penetrated by the fixed ring (401). A plurality of positioning assembly holes (418) distributed in a circular array are provided, a positioning plug rod (409) is rotatably inserted in the middle of the positioning assembly hole (418), one end of the positioning plug rod (409) extends to the inner side of the assembly ring groove (411) and a transmission gear (410) is fixed to the outer side of the end, the transmission gear (410) is engaged with the fixed gear ring (416), and a fixed disk (404) is fixed to the other end of the positioning plug rod (409), the fixed disk (404) is located outside the rotating ring (402) and is in rotational contact with the outer surface of the rotating ring (402), and a plurality of thinning shear rods (406) are fixed to the outer surface of the fixed disk (404), and the thinning shear rods (406) are distributed in a circular array around the axis of the positioning plug rod (409).

2. The straw returning and spreading device for improving the efficiency of sterilization according to claim 1, characterized in that: The thinning shear rod (406) is distributed in a spiral shape around the axis of the positioning plug rod (409), and the cross section of the thinning shear rod (406) is an equilateral triangle.

3. The straw returning and spreading device for improving the efficiency of sterilization according to claim 2, characterized in that: The spiral directions of the thinning shear rods (406) on the surfaces of two adjacent fixed disks (404) facing each other are completely opposite, and the thinning shear rod (406) on the surface of one fixed disk (404) is located inside the thinning shear rod (406) on the surface of the other fixed disk (404).

4. The straw returning and spreading device for improving the efficiency of sterilization according to claim 1, characterized in that: A medicine storage box (2) is detachably mounted on the upper surface of the assembly frame (1), a small high-pressure water pump is mounted on the bottom of the medicine storage box (2), a hose is fixed to the input end of the small high-pressure water pump, the top end of the hose passes through the bottom of the medicine storage box (2) and extends into the interior of the medicine storage box (2), and a medicine injection pipe (5) is fixed to the output end of the small high-pressure water pump, the medicine injection pipe (5) passes through the assembly frame (1), the fixing rod (9) and extends into the interior of the fixing ring (401).

5. The straw returning and spreading device for improving the efficiency of sterilization according to claim 4, characterized in that: A first annular sealing shell (412) and a second annular sealing shell (413) are fixed inside the fixing ring (401), the axes of the first annular sealing shell (412) and the second annular sealing shell (413) coincide, and four connecting rods (417) are fixed between the first annular sealing shell (412) and the second annular sealing shell (413), and sealing annular connecting plates (414) are rotatably clamped between the two side edges of the first annular sealing shell (412) and the second annular sealing shell (413), and the bottom end of the perfusion tube (5) passes through the fixing ring (401) and the first annular sealing shell (412).

6. The straw returning and spreading device for improving the efficiency of sterilization according to claim 5, characterized in that: A through hole (408) is provided at the center of the fixed disk (404), and a microbial agent dispensing conduit (405) is inserted in the middle of the through hole (408). One end of the microbial agent dispensing conduit (405) passes through the positioning plug rod (409) and passes through the sealing annular connecting plate (414). One end of the microbial agent dispensing conduit (405) rotates with the sealing annular connecting plate (414) and is flush with the inner surface of the sealing annular connecting plate (414).

7. The straw returning and spreading device for improving the efficiency of sterilization according to claim 6, characterized in that: A plurality of high-pressure nozzles (407) for applying the bacterial agent are distributed in a circular array on the outer surface of the bacterial agent applying conduit (405), and alloy sealing rings (415) are provided between the sealing annular connecting plate (414) and the first annular sealing shell (412) and the second annular sealing shell (413).

8. The straw returning and spreading device for improving the efficiency of sterilization according to claim 7, characterized in that: One end of the high-pressure nozzle (407) for applying the microbial agent is inserted into the interior of the microbial agent applying conduit (405) and the end thereof is flush with the inner surface of the microbial agent applying conduit (405). An electromagnetic valve is provided on the inner side of the outer end of the high-pressure nozzle (407).

9. The straw returning and spreading device for improving the efficiency of sterilization according to claim 8, characterized in that: The gap between the bottom of the bacterial agent dispensing high-pressure nozzle (407) of the lowest bacterial agent dispensing conduit (405) and the ground is five centimeters, and one-third of the fixed plate (404) enters the ground.

10. The straw returning and spreading device for improving the efficiency of sterilization according to claim 1, characterized in that: The bottom of the assembly frame (1) is detachably mounted with support wheels (10).

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