Microbial agent spraying device for straw degradation

Abstract

The utility model discloses a microbial agent spraying device for straw degradation, which belongs to the technical field of straw treatment and comprises a bottom box, a power supply system is arranged in the bottom box to supply power to the device, and traveling wheels are arranged at four corners below the bottom box; the liquid storage box is fixedly connected to the bottom box, and a liquid inlet is formed in the top of the liquid storage box; the spraying mechanism is connected to the tail end of the bottom box through an erecting mechanism and comprises a main pipe and two extension pipes, the bottoms of the main pipe and the extension pipes communicate with a plurality of nozzles, the main pipe is fixedly connected to the bottom of the rear end of the erecting mechanism, and the two extension pipes are rotationally connected to the two sides of the main pipe through rotating mechanisms correspondingly; the two extension pipes and the main pipe are communicated with a liquid pump through pipelines, and the liquid pump is communicated with the bottom of the liquid storage tank through a pipeline. Through the integrated design of the bottom box, the liquid storage box and the spraying mechanism, the problems that an existing device is insufficient in spraying range, inconvenient to transport and low in operation efficiency are effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of straw treatment technology, and in particular relates to a microbial agent spraying device for straw degradation. Background Technology

[0002] Straw treatment is a crucial step in agricultural production, and using microbial agents to degrade straw is an environmentally friendly and effective method. However, existing straw-degrading microbial agent spraying devices have several problems. For example, some devices have limited spraying range, making it difficult to achieve large-area uniform spraying, resulting in poor straw degradation and low spraying efficiency; some devices, while having a large spraying range, are correspondingly large in size, making them difficult to transport and store; furthermore, straw-covered fields become slippery due to the straw covering the ground, and the low friction between the wheels and straw in existing devices easily leads to slippage, making it difficult for vehicles or machinery to obtain sufficient traction to move forward.

[0003] Therefore, there is an urgent need to design a new type of microbial agent spraying device for straw degradation to solve the above problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a microbial agent spraying device for straw degradation.

[0005] To achieve the above objectives, this utility model provides a spraying device for microbial agents used in straw degradation, comprising:

[0006] The base box contains a power supply system to power the device, and four wheels are installed at the bottom corners of the base box.

[0007] A liquid storage tank is fixed to the base box, and an inlet is provided on the top of the liquid storage tank;

[0008] The spraying mechanism is connected to the rear end of the base box via a mounting mechanism. The spraying mechanism includes a main pipe and two extension pipes. The bottom of the main pipe and the extension pipes are connected to several nozzles. The main pipe is fixed to the bottom of the rear end of the mounting mechanism. The two extension pipes are rotatably connected to both sides of the main pipe via a rotating mechanism. The two extension pipes and the main pipe are all connected to a liquid pump via pipelines. The liquid pump is connected to the bottom of the liquid storage tank via pipelines.

[0009] Preferably, the outer circumference of the traveling wheel is provided with a plurality of patterns, the pattern depth is 10-14mm, and the pattern width is 10-15mm.

[0010] Preferably, a stirring rod is rotatably connected inside the liquid storage tank, and stirring blades are fixedly connected to the outside of the stirring rod. A stirring motor is driven through the top of the stirring rod and passes through the top surface of the liquid storage tank.

[0011] Preferably, the erection mechanism includes two lifting rods, which are fixed to the rear end of the base box. An extension plate is fixed to the top of each lifting rod, and the extension plate extends toward the rear end of the base box. The main pipe is fixed below the tail end of the extension plate.

[0012] Preferably, the liquid pump is fixed to the extension plate, and flow control valves are connected to the pipelines connecting the liquid pump to the main pipe and the liquid pump to the extension pipe.

[0013] Preferably, the rotating mechanism includes a first connecting block, a second connecting block, and a rotating shaft; the first connecting block is L-shaped, with one end fixed to the end of the main pipe and the other end extending outward and backward; one end of the second connecting block is connected to the end of the extension tube, and the other end is hinged to the end of the first connecting block away from the main pipe via the rotating shaft; the position of the rotating shaft is such that the extension tube rotates 180 degrees about the rotating shaft and becomes flush with the main pipe.

[0014] Preferably, a limiting pin is inserted on the first connecting block, and the first connecting block and the second connecting block are fixed by the pin after the extension tube is flush with the main tube.

[0015] Preferably, the liquid storage tank has a liquid level observation window on its side wall.

[0016] Preferably, a traction rod is fixedly connected to the front end of the base box.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] The integrated design of the base box, storage tank, and spraying mechanism effectively solves the problems of insufficient spraying range, inconvenient transportation, and low operating efficiency of existing devices. The base box serves as the basic support structure, with a built-in power supply system to power the device, and wheels at the four corners to ensure the device has autonomous movement capabilities and can adapt to complex field terrain. The storage tank is fixed to the top of the base box, and the top inlet facilitates rapid replenishment of microbial agents, ensuring continuous operation. Its integrated layout with the base box stabilizes the device's center of gravity and improves balance during movement. The spraying mechanism is connected to the rear of the base box via a mounting mechanism. It includes a main pipe and two rotatable extension pipes on either side, the angle of which is adjusted via a rotation mechanism. During operation, the extension pipes can be extended to form a larger spray coverage area with the main pipe (e.g., rotated to a 180° parallel position), allowing the main pipe and several nozzles at the bottom of the extension pipes to form a large-area spray array. This significantly expands the spray range and achieves uniform coverage, ensuring full contact between the straw surface and the microbial agent, thus improving the degradation effect. When not in operation, the extension pipes can be folded for storage, reducing the overall size of the device and solving the problems of inconvenient transportation and storage associated with traditional large-area spraying equipment. A liquid pump connects the liquid storage tank to the spraying mechanism via pipelines, forming a stable microbial agent delivery system that provides continuous pressure to the nozzles, ensuring uniform flow and stable pressure of the microbial agent during spraying. The overall structural design balances functionality and practicality. Through adjustable spray range, compact storage layout, and efficient power transmission, it achieves uniform spraying of large areas of straw, flexible equipment movement, and convenient storage, effectively improving the efficiency and quality of straw degradation treatment. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the non-operational state of the microbial agent spraying device for straw degradation of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the straw degradation microbial agent spraying device under operating conditions.

[0022] Figure 3 This utility model Figure 1 Enlarged view of A in the middle;

[0023] Figure 4 This is a cross-sectional view of the liquid storage tank in this utility model.

[0024] In the diagram: 1. Base box; 2. Traveling wheels; 3. Liquid storage tank; 4. Liquid inlet; 5. Spraying mechanism; 6. Erection mechanism; 7. Rotating mechanism; 8. Stirring rod; 9. Stirring blades; 10. Stirring motor; 11. Liquid level observation window; 12. Traction rod; 501. Main pipe; 502. Extension pipe; 503. Nozzle; 504. Liquid pump; 601. Lifting rod; 602. Extension plate; 701. First connecting block; 702. Second connecting block; 703. Rotating shaft; 704. Limit pin. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1 to 4 As shown, this embodiment provides a spraying device for microbial agents used to degrade straw, comprising:

[0028] The bottom box 1 is equipped with a power supply system to power the device, and the four corners of the bottom box 1 are equipped with travel wheels 2.

[0029] The liquid storage tank 3 is fixedly connected to the bottom box 1, and the liquid storage tank 3 has a liquid inlet 4 on the top.

[0030] The spraying mechanism 5 is connected to the tail end of the base box 1 via the mounting mechanism 6. The spraying mechanism 5 includes a main pipe 501 and two extension pipes 502. The bottom of the main pipe 501 and the extension pipes 502 are connected to several nozzles 503. The main pipe 501 is fixed to the bottom of the rear end of the mounting mechanism 6. The two extension pipes 502 are rotatably connected to both sides of the main pipe 501 via the rotating mechanism 7. The two extension pipes 502 and the main pipe 501 are all connected to a liquid pump 504 via pipelines. The liquid pump 504 is connected to the bottom of the liquid storage tank 3 via pipelines.

[0031] The integrated design of the base box 1, the liquid storage tank 3, and the spraying mechanism 5 effectively solves the problems of insufficient spraying range, inconvenient transportation, and low operating efficiency of existing devices. The base box 1 serves as the basic support structure, with a built-in power supply system to provide power to the device, and four corner wheels 2 to ensure that the device has autonomous movement capabilities and can adapt to complex field terrain. The liquid storage tank 3 is fixed above the base box 1, and the top liquid inlet 4 facilitates rapid replenishment of microbial agents, ensuring continuous operation. Its integrated layout with the base box 1 stabilizes the device's center of gravity and improves balance during movement. The spraying mechanism 5 is connected to the tail end of the base box 1 via the mounting mechanism 6. It includes a main pipe 501 and two rotatable extension pipes 502 on both sides. The angle of the two is adjusted by the rotation mechanism 7. During operation, the extension pipes 502 can be extended to form a larger spray coverage area with the main pipe 501 (e.g., rotated to a 180° level position), so that the main pipe 501 and several nozzles 503 at the bottom of the extension pipes 502 form a large-area spray array, significantly expanding the spray range and achieving uniform coverage, ensuring that the straw surface is fully in contact with the microbial agent and improving the degradation effect. When not in operation, the extension pipes 502 can be folded and stored, reducing the overall size of the device and solving the problem of inconvenient transportation and storage of traditional large-area spraying equipment. The liquid pump 504 connects the liquid storage tank 3 to the spraying mechanism 5 through pipelines to form a stable microbial agent delivery system, providing continuous pressure to the nozzles 503 and ensuring uniform flow and stable pressure of the microbial agent during spraying. The overall structural design takes into account both functionality and practicality. Through adjustable spraying range, compact storage layout and efficient power transmission, it achieves uniform spraying of straw over a large area, flexible movement of the equipment and convenient storage, effectively improving the efficiency and quality of straw degradation treatment.

[0032] Further optimization of the design: the outer circumference of the traveling wheel 2 is provided with several patterns, the pattern depth is 10-14mm, and the pattern width is 10-15mm.

[0033] The travel wheel 2 features a wide and deep tread pattern on its outer circumference, significantly improving the device's field passability and driving stability through optimized wheel surface friction structure. This tread design increases the contact friction between the travel wheel 2 and the straw and ground, allowing the wheel to effectively grip the straw or embed itself in soft ground, preventing slippage caused by the smooth surface of the straw. This ensures the device receives sufficient traction in complex field terrain, enabling smooth movement. Specifically, the deep tread pattern embeds itself into the straw and soil, providing strong grip and effectively preventing slippage. Even in damp straw fields, it quickly drains moisture, maintaining good adhesion. The wide grooves can accommodate and drain straw debris, reducing straw accumulation in the tire tread and maintaining good tire performance. This design not only enhances the device's autonomous movement in straw-covered areas, preventing operational interruptions due to slippage, but also indirectly ensures the continuity and uniformity of the spraying process—a stable travel speed allows the microbial agent output from the nozzle 503 to more evenly cover the straw surface, thereby improving the efficiency and quality of straw degradation treatment.

[0034] The design is further optimized by having a stirring rod 8 rotatably connected inside the storage tank 3, a stirring blade 9 fixedly connected to the outside of the stirring rod 8, and a stirring motor 10 driven through the top of the stirring rod 8 through the top surface of the storage tank 3.

[0035] The stirring mechanism inside the storage tank 3 addresses the issue of easy sedimentation and stratification of microbial agents by significantly improving the uniformity and effectiveness of agent spraying through an active mixing design. The stirring rod 8 penetrates the storage tank 3 and is connected to the external stirring motor 10. As the motor rotates, the stirring blades 9 on its outer periphery continuously agitate the agent within the storage tank 3, preventing sedimentation or stratification of microorganisms, nutrients, or adjuvants due to static conditions, ensuring the agent remains uniformly mixed. This design effectively solves the problem of inconsistent spraying effects caused by uneven agent concentration in traditional devices—the uniform agent, sprayed through the nozzle 503, forms a more stable microbial adhesion layer on the straw surface, significantly improving the consistency and efficiency of the degradation reaction. Furthermore, the power source for the stirring motor 10 can be shared with the power supply system of the bottom tank 1, simplifying the circuit design and reducing energy consumption. By continuously stirring, the device ensures that each spray of microbial agent has the same concentration of active ingredients, avoiding incomplete degradation due to insufficient local concentration or waste of resources caused by excessively high concentration. It guarantees the quality of straw degradation treatment from the source and provides reliable technical support for efficient and stable application of microbial agents in large-scale agricultural operations.

[0036] The scheme is further optimized. The erection mechanism 6 includes two lifting rods 601, which are fixed to the rear end of the base box 1. An extension plate 602 is fixed to the top of the lifting rod 601. The extension plate 602 extends to the rear end of the base box 1, and the main pipe 501 is fixed below the tail end of the extension plate 602.

[0037] The mounting mechanism 6, through the combined design of the lifting rod 601 and the extension plate 602, provides an adjustable support structure for the spraying mechanism 5, effectively solving the problem of fixed spraying height and difficulty in adapting to different straw covering environments in traditional devices. The two lifting rods 601 are fixed to the rear end of the base box 1, and the extension plate 602 at their top extends rearwards and supports the main pipe 501. The height adjustment function of the lifting rods 601, preferably hydraulic or electric, allows for flexible adjustment of the vertical height of the spraying mechanism 5, ensuring that the nozzles 503 at the bottom of the main pipe 501 and the extension pipe 502 maintain the optimal spraying distance from the straw surface. This avoids both excessive height leading to agent scattering and waste, and insufficient height limiting the spraying range, ensuring uniform coverage of straw of different thicknesses and stacking conditions. The rearward extension design of the extension plate 602 positions the spraying mechanism 5 at the rear of the device, forming a reasonable layout with the base box 1 and the travel wheels 2, preventing contamination of the chassis components by the agent during spraying. The design, through its height-adjustable and rationally laid-out mounting mechanism 6, enables the device to adapt to diverse field operation scenarios, significantly enhancing the equipment's environmental adaptability and operational flexibility, and providing reliable structural support for efficient and precise spraying of straw-degrading microbial agents.

[0038] In a further optimized design, the liquid pump 504 is fixed to the extension plate 602, and flow control valves are connected to the pipelines connecting the liquid pump 504 to the main pipe 501 and the liquid pump 504 to the extension pipe 502.

[0039] The liquid pump 504 and flow control valve significantly improve the controllability and precision of the spraying process. The liquid pump 504 is fixed to the extension plate 602, close to the main pipe 501 and extension pipe 502 of the spraying mechanism 5, shortening the agent delivery path, reducing pipeline pressure loss, and ensuring that the agent is delivered to the nozzle 503 at a stable pressure, avoiding flow attenuation or insufficient spraying power due to excessive distance. The flow control valve installed on the pipeline can independently adjust the agent flow rate of the main pipe 501 and extension pipe 502, allowing operators to flexibly adjust the output of each pipeline according to the straw distribution density in the field, the device's travel speed, or the spraying range (such as the extended pipe 502's unfolded or folded state). For example, during large-area rapid operations, increasing the flow rate of the extension pipe 502 can expand coverage efficiency, thereby achieving on-demand spraying, ensuring uniform agent adhesion on the straw surface, and avoiding resource waste due to over-application. Furthermore, the integrated design of the flow control valve, in conjunction with the rotatable nature of the spraying mechanism 5, allows for the retraction of one or both extension pipes 502 in confined areas. Simultaneously, the flow control valve at the retracted extension pipe 502 closes, enabling precise spraying of the microbial agent within narrow zones and preventing waste. This structural design balances operational flexibility and resource utilization, providing a reliable flow control solution for precise spraying in complex field environments. It effectively solves the problems of traditional devices, such as unadjustable spray volume, potential waste of microbial agents, or insufficient local concentration.

[0040] The scheme is further optimized. The rotating mechanism 7 includes a first connecting block 701, a second connecting block 702, and a rotating shaft 703. The first connecting block 701 is L-shaped, with one end fixed to the end of the main pipe 501 and the other end extending outward and backward. One end of the second connecting block 702 is connected to the end of the extension tube 502, and the other end is hinged to the end of the first connecting block 701 away from the main pipe 501 through the rotating shaft 703. The position of the rotating shaft 703 is such that the extension tube 502 rotates 180 degrees around the rotating shaft 703 and becomes flush with the main pipe 501.

[0041] The rotating mechanism 7, through the hinged design of the L-shaped first connecting block 701, the second connecting block 702 and the rotating shaft 703, provides a flexible and adjustable rotating connection for the extension tube 502 of the spraying mechanism 5, effectively solving the problems of fixed spraying range and inconvenient equipment storage in traditional devices. Specifically, one end of the L-shaped first connecting block 701 is fixed to the end of the main pipe 501 and extends outward and backward, leaving sufficient space for the rotation of the extension pipe 502. The other end is connected to the second connecting block 702 via a rotating shaft 703 and hinged to the extension pipe 502, allowing the extension pipe 502 to rotate 180° around the rotating shaft 703. During operation, the extension pipe 502 can be extended to both sides to form a straight line with the main pipe 501, i.e., flush with it, significantly expanding the lateral coverage of the spraying mechanism 5. Combined with the array of nozzles 503 at the bottom of the main pipe 501 and the extension pipe 502, it can achieve large-area uniform spraying and improve the coverage efficiency of the straw degradation agent. When not in operation, the extension pipe 502 can be rotated inward and folded to fit against the main pipe 501, greatly reducing the overall width of the device. This solves the problems of difficult transportation and space occupation of traditional large-size spraying equipment, making it especially suitable for narrow passages in the field and for equipment storage after large-scale operations. The rotating mechanism 7 is designed to combine structural stability with adjustment flexibility. The precise position of the hinge point ensures that the extension pipe 502 remains flush with the main pipe 501 after rotation, avoiding spray overlap or missed spraying due to angular deviation. It also simplifies the operation process—the angle of the extension pipe 502 can be manually adjusted without tools to adapt to the operational needs of different plot widths. Furthermore, the durable design of the rotating shaft 703 ensures reliability during long-term use. Combined with flexible pipeline connections, it prevents pulling or damage to the agent delivery pipeline during rotation, ensuring the stability and continuity of the spraying system. Overall, the rotating mechanism 7, through its innovative foldable and adjustable structure, achieves flexible expansion of the spraying range and free switching of equipment size, significantly improving the environmental adaptability and practical value of the device in actual operation.

[0042] In a further optimized design, a limiting pin 704 is inserted into the first connecting block 701. After the extension tube 502 is flush with the main tube 501, the first connecting block 701 and the second connecting block 702 are fixed by the pin.

[0043] The design of the first connecting block 701, with the insertion of the limiting pin 704 and its fixation after the extension tube 502 is flush with the main tube 501, significantly improves the stability and reliability of the spraying mechanism 5 during operation through a mechanical locking mechanism. The limiting pin 704, as a pluggable fixing component, passes through the pin holes of the first connecting block 701 and the second connecting block 702 after the extension tube 502 is rotated to a working state flush with the main tube 501, rigidly connecting the two. This effectively prevents the extension tube 502 from shifting angle due to field bumps, pump 504 vibration, or wind, ensuring that the spraying range always maintains the preset maximum coverage state. It avoids changes in the position of the nozzle 503 or spray overlap / missed spraying problems caused by pipe vibration, thereby ensuring the uniformity of the microbial agent adhesion on the straw surface. This structural design combines ease of operation with robust stability. Operators can quickly insert and remove the limiting pin 704 without tools, switching the extension tube 502 between its extended and folded states to adapt to the operational needs of different plots. Simultaneously, the rigid connection of the limiting pin 704 can withstand dynamic loads during operation, ensuring stable operation of the spraying mechanism 5 in complex terrain. Furthermore, the limiting pin 704, in conjunction with the rotating shaft 703, forms a linkage constraint, further optimizing the mechanical balance of the rotating mechanism 7, reducing wear at hinge points during long-term use, and extending the equipment's service life. Overall, the addition of the limiting pin 704, through a simple and reliable mechanical locking method, solves the positional stability problem of the rotatable spraying mechanism 5 during operation, providing a crucial structural guarantee for large-area uniform spraying, and significantly improving the operational accuracy and reliability of the device in practical applications.

[0044] The design has been further optimized by adding a liquid level observation window 11 to the side wall of the storage tank 3.

[0045] The liquid level observation window 11 on the side wall of the storage tank 3 effectively solves the problem of difficulty in real-time monitoring of the bacterial agent level in traditional devices through its intuitive liquid level monitoring design. The liquid level observation window 11 allows operators to directly observe the remaining bacterial agent level inside the storage tank 3 without opening it, avoiding operation interruptions or frequent shutdowns for inspection due to bacterial agent depletion, and significantly improving the continuity and efficiency of spraying operations.

[0046] Furthermore, the liquid level observation window 11 is made of transparent material and engraved with liquid level markings. The liquid level observation window 11 is preferably made of tempered glass or high-strength plastic and is integrated with the side wall of the storage tank 3. Its simple and durable structure allows for stable use in complex field environments and facilitates cleaning and maintenance. Through the clear liquid level markings, operators can accurately monitor the consumption of the microbial agent and replenish it promptly through the top inlet 4, avoiding uneven spraying or reduced degradation effects due to insufficient storage, thus ensuring the quality of straw treatment from the source.

[0047] The design has been further optimized, with a traction rod 12 fixedly connected to the front end of the bottom box 1.

[0048] The towing rod 12 serves as a connecting hub, which can be easily connected to external power equipment such as tractors and agricultural vehicles, enabling the device to move stably with the help of external traction.

[0049] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0050] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A spraying device for microbial inoculants used in straw degradation, characterized in that, include: The bottom box (1) is equipped with a power supply system to power the device, and the bottom box (1) is equipped with four wheels (2) at the bottom corners; A liquid storage tank (3) is fixedly connected to the bottom box (1), and a liquid inlet (4) is provided on the top of the liquid storage tank (3); The spraying mechanism (5) is connected to the tail end of the base box (1) via the mounting mechanism (6). The spraying mechanism (5) includes a main pipe (501) and two extension pipes (502). The bottom of the main pipe (501) and the extension pipes (502) are connected to several nozzles (503). The main pipe (501) is fixed to the bottom of the rear end of the mounting mechanism (6). The two extension pipes (502) are rotatably connected to both sides of the main pipe (501) via the rotating mechanism (7). The two extension pipes (502) and the main pipe (501) are all connected to a liquid pump (504) via pipelines. The liquid pump (504) is connected to the bottom of the liquid storage tank (3) via pipelines.

2. The straw degradation microbial agent spraying device according to claim 1, characterized in that: The traveling wheel (2) has several patterns on its outer circumference, the pattern depth is 10-14mm, and the pattern width is 10-15mm.

3. The straw degradation microbial agent spraying device according to claim 1, characterized in that: A stirring rod (8) is rotatably connected inside the liquid storage tank (3), and a stirring blade (9) is fixedly connected to the outside of the stirring rod (8). A stirring motor (10) is driven through the top of the stirring rod (8) through the top surface of the liquid storage tank (3).

4. The straw degradation microbial agent spraying device according to claim 1, characterized in that: The erection mechanism (6) includes two lifting rods (601), which are fixed to the rear end of the base box (1). An extension plate (602) is fixed to the top of the lifting rod (601), which extends to the rear end of the base box (1). The main pipe (501) is fixed below the tail end of the extension plate (602).

5. The straw degradation microbial agent spraying device according to claim 4, characterized in that: The liquid pump (504) is fixed to the extension plate (602), and flow control valves are connected to the pipelines connecting the liquid pump (504) to the main pipe (501) and the liquid pump (504) to the extension pipe (502).

6. The straw degradation microbial agent spraying device according to claim 1, characterized in that: The rotating mechanism (7) includes a first connecting block (701), a second connecting block (702), and a rotating shaft (703); the first connecting block (701) is L-shaped, with one end fixed to the end of the main pipe (501) and the other end extending outward and backward; one end of the second connecting block (702) is connected to the end of the extension tube (502), and the other end is hinged to the end of the first connecting block (701) away from the main pipe (501) through the rotating shaft (703); the position of the rotating shaft (703) is such that the extension tube (502) rotates 180 degrees around the rotating shaft (703) and becomes flush with the main pipe (501).

7. The straw degradation microbial agent spraying device according to claim 6, characterized in that: A limiting pin (704) is inserted into the first connecting block (701). After the extension tube (502) is flush with the main tube (501), the first connecting block (701) and the second connecting block (702) are fixed by the pin.

8. The straw degradation microbial agent spraying device according to claim 1, characterized in that: The liquid storage tank (3) has a liquid level observation window (11) on its side wall.

9. The straw degradation microbial agent spraying device according to claim 1, characterized in that: A traction rod (12) is fixedly connected to the front end of the bottom box (1).

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