Self-operated galvanostat for vehicle-mounted field fertilization biogas slurry

Abstract

The utility model discloses a self-operated galvanostat for vehicle-mounted field fertilization biogas slurry, which belongs to the technical field of fertilization and comprises a vehicle body walking in a field and a vehicle-mounted biogas slurry box fixed on the vehicle body. The buoyancy constant-flow assembly is driven to ascend and descend in the inner cavity of the buoyancy tank through the liquid level of flowing-in biogas slurry, after the biogas slurry level in the inner cavity of the buoyancy tank rises, the buoyancy constant-flow assembly is driven to ascend to seal a liquid inlet pipe at the top end of the buoyancy tank, and the biogas slurry accumulated in the liquid inlet pipe is sealed and intercepted by the buoyancy constant-flow assembly. The liquid discharging pipe opening is inserted into the liquid inlet pipe in a sealed mode, so that biogas slurry in the vehicle-mounted biogas slurry box can flow into the liquid inlet pipe from the liquid discharging pipe opening. According to the utility model, the biogas slurry self-operated galvanostat is mounted through the small tank car, so that the biogas slurry applying device runs at a constant speed in the field, the uniformity of applied biogas slurry is greatly improved, the labor consumption is greatly reduced, the pressurization energy is avoided, and the low-manpower, low-energy-consumption, high-uniformity and low-cost application is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fertilization technical field especially a kind of self-help type constant current device for vehicle-mounted field fertilization biogas slurry. BACKGROUND

[0002] In modern agricultural production, biogas slurry, as a high-quality organic fertilizer, is widely used in field fertilization. Traditional biogas slurry fertilization systems usually include a vehicle-mounted biogas slurry tank, a pumping device, a pipeline network and a spraying device. However, these systems have some obvious shortcomings and limitations.

[0003] Problems exist in the application of biogas slurry in crop production and livestock breeding: due to the low effective content of biogas slurry, the large amount of application and the high cost of application, most farmers have low enthusiasm for application. A small number of farmers with higher enthusiasm use rough methods such as flooding to reduce costs, which brings adverse consequences: first, over-application and unreasonable application may cause new non-point source pollution due to the overflow of biogas slurry during flooding; second, the distribution of biogas slurry in the field is very uneven, and biogas slurry damage often occurs around the water inlet and in low-lying areas of the field, while the far water inlet and high-lying areas are short of fertilizer.

[0004] Currently, the more advanced application methods are to use artificial soft pipe pressurized spraying and small tank vehicles to walk and pressurized spraying, which can solve the problems of over-application and uneven field operation to some extent, but over-border spraying often occurs, causing non-point source pollution. At the same time, due to the high consumption of labor and large energy consumption for pressurization, the cost is still relatively high. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a self-help type constant current device for vehicle-mounted field fertilization biogas slurry to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a self-help type constant current device for vehicle-mounted field fertilization biogas slurry is arranged below a vehicle-mounted biogas slurry tank. The vehicle-mounted biogas slurry tank is fixed on a vehicle body walking in the field, the vehicle-mounted biogas slurry tank has biogas slurry therein, a buoyancy tank is longitudinally embedded in the inner bottom wall of the vehicle body below the vehicle-mounted biogas slurry tank, the bottom surface of the vehicle-mounted biogas slurry tank has a liquid outlet pipe opening for discharging biogas slurry into the buoyancy tank, a buoyancy constant flow assembly is arranged in the inner cavity of the buoyancy tank, the buoyancy constant flow assembly is driven to rise by the liquid level of the inflowing biogas slurry in the inner cavity of the buoyancy tank, when the biogas slurry level in the inner cavity of the buoyancy tank rises, the buoyancy constant flow assembly is driven to rise to close the liquid inlet pipe at the top end of the buoyancy tank, the accumulated biogas slurry in the liquid inlet pipe is blocked and retained by the buoyancy constant flow assembly, and a plurality of fertilization pipes are connected to the bottom of the buoyancy tank. The liquid outlet pipe opening is sealingly inserted into the liquid inlet pipe, so that the biogas slurry in the vehicle-mounted biogas slurry tank can flow from the liquid outlet pipe opening into the liquid inlet pipe and finally into the buoyancy tank.

[0007] Preferably, the top surface of the buoyancy tank is provided with a detachable top cover, the liquid inlet pipe is longitudinally connected to the center of the top surface of the detachable top cover, and the detachable top cover has a manual valve inside.

[0008] Preferably, the buoyancy constant flow assembly comprises a buoyancy body arranged in the inner cavity of the buoyancy tank and a conical body fixed to the top surface of the buoyancy body, and the lower liquid pipe opening is floated by the liquid level of the biogas liquid, so that the buoyancy tank abuts upwardly on the inner wall of the liquid inlet pipe.

[0009] Preferably, the buoyancy body comprises a foam disc block, a positioning vertical rod is fixed to the center of the inner bottom wall of the buoyancy tank, and the positioning vertical rod is longitudinally connected to the center of the foam disc block and the conical body. The design of the positioning vertical rod can help maintain the verticality of the foam disc block when it rises, so that the conical body is properly connected in the liquid inlet pipe, preventing the foam disc block and the conical body from deviating from the position when they rise and failing to be connected in the liquid inlet pipe.

[0010] Preferably, the bottom surface of the buoyancy tank is annularly connected with a plurality of shunt pipes, and the plurality of fertilizer pipes are sealingly connected with the shunt pipes.

[0011] Preferably, one end of the vehicle body is respectively provided with a first pipe hanger and a second pipe hanger, and the fertilizer pipes are hung on the first pipe hanger or the second pipe hanger according to the needs.

[0012] Preferably, the end of the vehicle body is fixed with an L-shaped fixing plate, the L-shaped fixing plate is perpendicularly connected to the vertical included angle of the vehicle body, and the bottom surface of the L-shaped fixing plate is welded with a lifting vertical plate. The L-shaped fixing plate is fixedly connected with the outer wall of the vehicle body by bolts.

[0013] Preferably, the first pipe hanger is welded to the bottom end of the lifting vertical plate, the outer wall of the L-shaped fixing plate is welded with a second pipe hanger, and the middle position of the second pipe hanger is longitudinally provided with a pipe hanging opening for hanging the excess fertilizer pipes.

[0014] Preferably, a plurality of branch pipe openings for hanging the fertilizer pipes are equidistantly arranged in the first pipe hanger. If the fertilization is too dense, a part of the fertilizer pipes can be hung in the pipe hanging opening, and the excess fertilizer pipes can be hung through the design of the second pipe hanger and the pipe hanging opening.

[0015] Preferably, the inner wall of each branch pipe opening is bonded with a rubber anti-skid inner sleeve, and the rubber anti-skid inner sleeve is in frictional contact with the outer wall of the fertilizer pipe in the branch pipe opening.

[0016] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0017] The self-powered constant flow device for vehicle-mounted field biogas slurry fertilization realizes automatic regulation of biogas slurry flow through a buoyant constant flow assembly in the buoyant tank, in particular, the design of the buoyant body and the conical body. When the liquid level in the buoyant tank rises, the buoyant body rises and closes the liquid inlet pipe, preventing more biogas slurry from flowing in, thereby maintaining the stability of the internal pressure of the system and ensuring the constant flow of biogas slurry. This design does not require an external power source or a complex control system, reducing equipment costs and maintenance difficulty. Traditional fertilization systems may cause excessive fertilization due to unstable flow, resulting in waste of resources and environmental pollution. The technical solution effectively prevents excessive biogas slurry from flowing into the field and reduces the waste of fertilizer, protecting the soil and water resources through precise control of the buoyant constant flow assembly.

[0018] Through the design of multiple shunt pipes and fertilization pipes, the technical solution can uniformly distribute biogas slurry to each fertilization point in the field, ensuring that each plant can obtain an appropriate amount of nutrients. This not only improves the utilization rate of fertilizer, but also promotes the healthy growth of crops, ultimately improving crop yield and quality. The layout of the fertilization pipe can be flexibly adjusted according to the specific conditions of the field, such as terrain, crop distribution, etc., to ensure the best fertilization effect. In particular, in large-area farmland, this uniform fertilization method is particularly important.

[0019] By precisely controlling the flow of biogas slurry, the technical solution effectively avoids excessive fertilization, reduces waste of fertilizer, and reduces the pressure on the environment from agricultural production. At the same time, the working principle of the buoyant constant flow assembly does not rely on external energy, meeting the requirements of energy saving and environmental protection. Excessive fertilization may cause soil compaction and water eutrophication, affecting the ecological environment. The technical solution ensures reasonable fertilization amount through constant flow control, reducing pollution to soil and water resources, and is conducive to the development of sustainable agriculture.

[0020] The technical solution installs a biogas slurry self-powered constant flow device on a small tank truck, uniformly walks in the field, greatly improves the uniformity of biogas slurry application, greatly reduces labor consumption, eliminates pressurization energy, and realizes low labor, low energy consumption, high uniformity, and low cost application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 It is a structural schematic diagram of the present application;

[0023] Figure 2 It is a structural schematic diagram of the buoyant tank of the present application;

[0024] Figure 3 It is the dismounting structure schematic view of the foam disc block of the utility model;

[0025] Figure 4 It is the connection schematic view of the cone body of the utility model;

[0026] Figure 5 It is the connection structure schematic view of the first pipe hanger and the second pipe hanger of the utility model.

[0027] Mark explanation:

[0028] In the drawing: 1, vehicle body; 2, vehicle-mounted biogas slurry tank; 3, liquid outlet; 4, buoyancy tank; 5, buoyancy body; 6, fertilization pipe; 7, first pipe hanger; 8, second pipe hanger; 9, detachable top cover; 10, shunt pipe; 11, liquid inlet pipe; 12, manual valve; 13, foam disc block; 14, cone body; 15, positioning vertical rod; 16, L fixed plate; 17, hoisting vertical plate; 18, pipe hanging opening; 19, branch pipe opening; 20, rubber antiskid inner sleeve. Specific implementation

[0029] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, some technical features known in the art are not described to avoid obscuring the utility model.

[0030] Unless the direction indicated by the single definition, the directions such as up, down, left, right, front, back, inside and outside involved in this paper are based on the directions such as up, down, left, right, front, back, inside and outside in the drawing shown by the utility model, which is explained here.

[0031] The embodiment provides a kind of Figures 1 to 5The self-powered constant flow device for vehicle-mounted field fertilization biogas slurry is arranged below the vehicle-mounted biogas slurry tank 2. The vehicle-mounted biogas slurry tank is fixed on the vehicle body running in the field. The vehicle-mounted biogas slurry tank 2 has biogas slurry, and the floating tank 4 is longitudinally embedded below the vehicle-mounted biogas slurry tank 2 and on the inner bottom wall of the vehicle body 1. The bottom surface of the vehicle-mounted biogas slurry tank 2 has a liquid outlet 3 for discharging biogas slurry into the floating tank 4. The floating constant flow assembly is arranged in the inner cavity of the floating tank 4. The floating constant flow assembly is driven to rise by the liquid level of the inflowing biogas slurry in the inner cavity of the floating tank 4. When the biogas slurry level in the inner cavity of the floating tank 4 rises, the floating constant flow assembly is driven to rise to close the liquid inlet pipe 11 at the top end of the floating tank 4, so that the biogas slurry accumulated in the liquid inlet pipe 11 is blocked and retained by the floating constant flow assembly. The bottom of the floating tank 4 is connected with a plurality of fertilization pipes 6. The liquid outlet 3 is sealingly inserted into the liquid inlet pipe 11, so that the biogas slurry in the vehicle-mounted biogas slurry tank 2 can flow from the liquid outlet 3 into the liquid inlet pipe 11 and finally into the floating tank 4. The liquid outlet 3 is located at the bottom of the vehicle-mounted biogas slurry tank 2 and serves as a channel for biogas slurry flowing from the vehicle-mounted biogas slurry tank 2 to the floating tank 4. It can effectively control and guide the flow of liquid and ensure that the biogas slurry can smoothly enter the floating tank 4 for subsequent treatment. The floating tank 4 contains the floating constant flow assembly. When the biogas slurry flows in, the floating body 5 will rise with the rising of the liquid level and finally close the liquid inlet pipe 11, so as to keep the internal pressure of the system stable and achieve the constant flow effect.

[0032] In this embodiment, the top surface of the floating tank 4 is provided with a detachable top cover 9, and the liquid inlet pipe 11 is longitudinally connected to the center position of the top surface of the detachable top cover 9. The inside of the detachable top cover 9 has a manual valve 12.

[0033] In this embodiment, the floating constant flow assembly includes a floating body 5 arranged in the inner cavity of the floating tank 4 and a conical body 14 fixed to the top surface of the floating body 5. The liquid level of the biogas slurry floats the liquid outlet 3, so that the floating tank 4 abuts upwardly on the inner wall of the liquid inlet pipe 11. The floating body 5 and the conical body 14 together constitute the core part of the floating constant flow assembly. The floating body 5 is made of light material, such as a foam disc block 13, which can float in the biogas slurry and respond to the change of the liquid level by its own buoyancy, thereby driving the conical body 14 to act to close or open the liquid inlet pipe 11.

[0034] In this embodiment, the buoyant body 5 comprises a foam disc block 13, and a positioning vertical rod 15 is fixed at the center of the inner bottom wall of the buoyant tank 4, which longitudinally penetrates the center of the foam disc block 13 and the conical body 14. The design of the positioning vertical rod 15 can help maintain the longitudinal verticality of the foam disc block 13 when it rises, so as to help the conical body 14 be exactly clamped in the liquid inlet pipe 11, preventing the foam disc block 13 and the conical body 14 from deviating from the position when they rise and failing to be clamped in the liquid inlet pipe 11. The liquid inlet pipe 11 connects the vehicle-mounted biogas slurry tank 2 and the buoyant tank 4, and is a key path for biogas slurry transmission. It receives biogas slurry from the vehicle-mounted biogas slurry tank 2 through the liquid outlet pipe 3 and guides it to the buoyant tank 4, which plays a sealing role when the buoyant body 5 rises, preventing biogas slurry from continuously flowing into the buoyant tank 4. The conical body 14 is fixed on the top surface of the buoyant body 5 and is designed in a conical shape to better fit the inner wall of the liquid inlet pipe 11, tightly sealing the liquid inlet pipe 11 when the buoyant body 5 rises, preventing excessive biogas slurry from flowing into the buoyant tank 4.

[0035] In this embodiment, the bottom surface of the buoyant tank 4 is connected with multiple shunt pipes 10, and multiple fertilizer pipes 6 are sealingly connected with the shunt pipes 10.

[0036] In this embodiment, one end of the vehicle body 1 is respectively provided with a first pipe hanger 7 and a second pipe hanger 8, and the fertilizer pipes 6 are hung on the first pipe hanger 7 or the second pipe hanger 8 according to the needs.

[0037] In this embodiment, the end of the vehicle body 1 is fixed with an L-shaped fixed plate 16, which is vertically clamped on the vertical angle of the vehicle body 1, and the bottom surface of the L-shaped fixed plate 16 is welded with a lifting vertical plate 17. The L-shaped fixed plate 16 is fixedly connected with the outer wall of the vehicle body 1 by bolts.

[0038] In this embodiment, the first pipe hanger 7 is welded at the bottom end of the lifting vertical plate 17, and the outer wall of the L-shaped fixed plate 16 is welded with a second pipe hanger 8, and a pipe hanging opening 18 for hanging extra fertilizer pipes 6 is longitudinally arranged at the middle position of the second pipe hanger 8. The first pipe hanger 7 and the second pipe hanger 8 are used to support and organize the fertilizer pipes 6, preventing the pipelines from being in disorder, and also facilitating the operator to adjust the position of the fertilizer pipes 6 according to the actual needs. Especially when the fertilization density is large, the extra fertilizer pipes 6 can be hung in the pipe hanging opening 18, improving the work efficiency.

[0039] In this embodiment, multiple branch pipe openings 19 for hanging branch pipes for fertilization are equally arranged inside the first pipe hanger 7. When the fertilization is too dense, a part of the fertilizer pipes 6 can be hung in the pipe hanging opening 18, and the design of the second pipe hanger 8 and the pipe hanging opening 18 enables the extra fertilizer pipes 6 to be hung.

[0040] In this embodiment, the inner wall of each branch pipe opening 19 is bonded with a rubber anti-skid inner sleeve 20, which is in frictional contact with the outer wall of the fertilizer pipe 6 in the branch pipe opening 19. The rubber anti-skid inner sleeve 20 is bonded to the inner wall of each branch pipe opening 19 and is in frictional contact with the outer wall of the fertilizer pipe 6, which increases the stability of the hanging, reduces the risk of the fertilizer pipe 6 falling off, and ensures the safety and accuracy of the fertilization process.

[0041] Working principle:

[0042] The self-powered constant current device for vehicle-mounted field fertilization of biogas slurry loads the pre-processed biogas slurry into the vehicle-mounted biogas slurry tank 2, ensuring sufficient quantity to meet the fertilization demand. According to the specific conditions of the farmland, such as area and crop type, the position of the manual valve 12 is adjusted to set the appropriate biogas slurry flow.

[0043] When everything is ready, the operator opens the manual valve 12 inside the detachable top cover 9, allowing the biogas slurry to flow from the vehicle-mounted biogas slurry tank 2 through the liquid inlet pipe opening 3 into the liquid inlet pipe 11. As the manual valve 12 is opened, the biogas slurry begins to flow from the liquid inlet pipe 11 into the buoyancy tank 4. At this time, the liquid level inside the buoyancy tank 4 gradually rises.

[0044] As the liquid level in the buoyancy tank 4 rises, the buoyant body 5 is subjected to an upward buoyant force. Since the buoyant body 5 includes lightweight foam blocks 13, it will rise as the liquid level rises. When the buoyant body 5 rises to a certain height, the conical body 14 fixed on its top comes into close contact with the inner wall of the liquid inlet pipe 11, forming a seal and preventing more biogas slurry from entering the buoyancy tank 4. This process realizes the function of automatically adjusting the biogas slurry flow, ensuring stable pressure in the system and avoiding excessive biogas slurry from rushing in. Throughout the process, the positioning vertical rod 15 penetrates the center of the foam blocks 13 and the conical body 14, ensuring that the buoyant body 5 always remains vertical during the rising process, preventing poor sealing due to deflection.

[0045] The multiple shunt pipes 10 connected in a ring at the bottom of the buoyancy tank 4 are responsible for uniformly distributing the biogas slurry in the buoyancy tank 4 to each fertilizer pipe 6. Each shunt pipe 10 is in sealed connection with one or more fertilizer pipes 6, ensuring that the biogas slurry can be uniformly delivered to different locations in the field. The fertilizer pipe 6 delivers the biogas slurry adjusted by the buoyancy tank 4 to each fertilization point in the field. The fertilizer pipe 6 can be hung on the first pipe hanger 7 or the second pipe hanger 8 as needed, facilitating the operator to adjust the layout.

[0046] If the fertilization density is large, part of the fertilization pipe 6 can be temporarily hung in the pipe hanging port 18 of the second pipe hanging rack 8, so as to avoid pipeline disorder and improve work efficiency. The operator can ensure that the floating constant flow assembly works normally by observing the liquid level change of the buoyancy tank 4. If any abnormality is found, such as too high or too low liquid level, the biogas slurry flow can be controlled by adjusting the manual valve 12. During the fertilization process, if any problem is encountered, such as the floating body 5 cannot normally rise, the operator can stop the operation at any time, open the detachable top cover 9 for inspection and maintenance.

[0047] When the fertilization task is completed, the operator closes the manual valve 12 to stop the biogas slurry from flowing into the buoyancy tank 4.

[0048] It should be noted that the relational terms herein, such as one and two, are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the statement "including a limited element" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0049] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-powered constant current device for vehicle-mounted field fertilization biogas slurry, which is arranged below a vehicle-mounted biogas slurry tank (2), characterized in that: The application relates to a vehicle-mounted biogas slurry tank, which comprises a buoyancy tank (4), the bottom surface of the vehicle-mounted biogas slurry tank (2) is provided with a liquid outlet (3) for discharging biogas slurry into the buoyancy tank (4), a buoyancy constant flow assembly is arranged in the inner cavity of the buoyancy tank (4), the buoyancy constant flow assembly is driven to ascend in the inner cavity of the buoyancy tank (4) by the liquid level of the flowing biogas slurry, when the biogas slurry level in the inner cavity of the buoyancy tank (4) rises, the buoyancy constant flow assembly is driven to ascend to close the liquid inlet pipe (11) at the top end of the buoyancy tank (4), so that the accumulated biogas slurry in the liquid inlet pipe (11) is closed and retained by the buoyancy constant flow assembly, and the bottom of the buoyancy tank (4) is connected with a plurality of fertilization pipes (6).

2. The self-powered constant current device for vehicle-mounted field fertilization biogas slurry according to claim 1, characterized in that: The top surface of the buoyancy tank (4) is provided with a detachable top cover (9), the liquid inlet pipe (11) is longitudinally connected to the center position of the top surface of the detachable top cover (9), and the inside of the detachable top cover (9) is provided with a manual valve (12).

3. The self-powered constant current device for vehicle-mounted field fertilization biogas slurry according to claim 2, characterized in that: The buoyancy constant flow assembly comprises a buoyancy body (5) arranged in the inner cavity of the buoyancy tank (4) and a conical body (14) fixed to the top surface of the buoyancy body (5). The liquid outlet (3) is floated by the liquid level of the biogas slurry, so that the buoyancy tank (4) is abutted upward on the inner wall of the liquid inlet pipe (11).

4. The self-powered constant current device for vehicle-mounted field fertilization biogas slurry according to claim 3, characterized in that: The buoyancy body (5) comprises a foamed disc block (13), a positioning vertical rod (15) is fixed to the center position of the inner bottom wall of the buoyancy tank (4) and longitudinally penetrates the center positions of the foamed disc block (13) and the conical body (14).

5. The self-powered constant current device for vehicle-mounted field fertilization biogas slurry according to claim 4, characterized in that: The bottom surface of the buoyancy tank (4) is annularly and throughly connected with a plurality of shunt pipes (10), and the plurality of fertilization pipes (6) are sealingly connected with the shunt pipes (10) respectively.

6. The self-contained constant current device for vehicle-mounted field fertilization biogas slurry according to claim 5, characterized in that: A first pipe hanger (7) and a second pipe hanger (8) are arranged at one end of the vehicle body (1) respectively, and the fertilization pipes (6) are hung on the first pipe hanger (7) or the second pipe hanger (8) according to requirements.

7. The self-contained constant current device for vehicle-mounted field fertilization biogas slurry according to claim 6, characterized in that: An L-shaped fixing plate (16) is fixed to the end of the vehicle body (1), the L-shaped fixing plate (16) is perpendicularly clamped on the vertical included angle of the vehicle body (1), and a hoisting vertical plate (17) is welded to the bottom surface of the L-shaped fixing plate (16).

8. The self-powered constant current device for vehicle-mounted field fertilization biogas slurry according to claim 7, characterized in that: The first pipe hanger (7) is welded to the bottom end of the hoisting vertical plate (17), the second pipe hanger (8) is welded to the outer wall of the L-shaped fixing plate (16), and a pipe hanging opening (18) for hanging the excess fertilization pipes (6) is longitudinally arranged in the middle position of the second pipe hanger (8).

9. The self-contained constant current device for vehicle-mounted field fertilization biogas slurry according to claim 8, characterized in that: A plurality of branch pipe openings (19) for hanging the branch pipes for fertilization are equidistantly arranged in the first pipe hanger (7).

10. The self-contained constant current device for vehicle-mounted field fertilization biogas slurry according to claim 9, characterized in that: A rubber anti-skid inner sleeve (20) is adhered to the inner wall of each branch pipe opening (19), and the rubber anti-skid inner sleeve (20) is in frictional contact with the outer wall of the fertilization pipe (6) in the branch pipe opening (19).

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