Filling device suitable for liquid fertilizers with different volumes

Abstract

The utility model relates to the technical field of fertilizer filling, and discloses a filling device suitable for liquid fertilizers with different volumes, which comprises a box body, the rear end of the box body is fixedly connected with a plurality of pressure pumps, the rear sides of the pressure pumps are communicated with a first communicating pipe, the rear end of the first communicating pipe is communicated with a fertilizer conveying pipe, and the rear end of the first communicating pipe is communicated with a second communicating pipe. The front side, close to the middle, of the pressure pump is communicated with second communicating pipes, the front sides of the multiple second communicating pipes are communicated with hollow pipes, the front sides of the hollow pipes are communicated with multiple third communicating pipes, the tops of the third communicating pipes are communicated with fertilizer conveying hoses, and the other ends of the fertilizer conveying hoses are communicated with fixing pipes. According to the fertilizer filling device disclosed by the utility model, firstly, the fertilizer is pumped into the communicating pipe I through the fertilizer conveying pipe by the pumping force of the pressure pump, and then the fertilizer is conveyed into the fixed pipe through the fertilizer conveying hose, so that the effect that the fertilizer can be pumped into the filling head through the fertilizer conveying pipe for filling through the pumping of the pressure pump is realized.

Description

Technical Field

[0001] This utility model relates to the field of fertilizer filling technology, and in particular to a liquid fertilizer filling device suitable for different volumes. Background Technology

[0002] A liquid fertilizer filling device suitable for different volumes is firstly equipped with an adjustable filling volume control system. Through a high-precision electronic metering device, operators can accurately set the filling volume for each batch according to different fertilizer packaging specifications. Whether it is a small-capacity fertilizer bottle for home gardening or a large-capacity fertilizer bucket for agricultural production, accurate filling can be achieved through simple parameter settings. Moreover, the filling head of the device is equipped with advanced sensing technology. When containers of different volumes are placed in the designated position, the sensing device quickly identifies the height of the container and automatically adjusts the descent depth of the filling head to ensure that the fertilizer is accurately injected into the container, avoiding fertilizer overflow or insufficient filling caused by improper filling head positioning. The device's conveying system is highly flexible, using an adjustable-gap conveyor belt that can adapt to containers of different sizes, whether it is a slender small bucket or a short and wide large bucket, all can be smoothly transported on the conveyor belt.

[0003] A search revealed Chinese Patent Publication No. CN222312684U, which discloses a liquid fertilizer filling device in the field of liquid fertilizer production equipment technology. The device includes a barrel body with a sieve plate fixedly installed inside. The sieve plate has multiple sieve holes on its surface. A connecting sleeve is rotatably connected to the top of the barrel body. A first motor starts and drives a second rotating shaft to rotate. The rotation of the second rotating shaft drives the connecting sleeve to rotate via a sprocket and chain. The connecting sleeve drives the first rotating shaft at the bottom to rotate. The rotation of the first rotating shaft drives a stirring rod and a scraper to stir the liquid fertilizer. When it is necessary to clean the inside of the barrel body... During washing, the staff starts a pump, which draws water from the tank into the connecting sleeve through a hose. The water is then sprayed out through a spray pipe and, as the connecting sleeve rotates, sprays the inner wall of the tank. A scraper further cleans the fertilizer, effectively removing residual fertilizer from the tank through the spray pipe and scraper, thus extending the tank's lifespan. While this device effectively removes residual fertilizer and extends the tank's lifespan, it cannot solve the problem of pumping liquid fertilizer into the filling head for filling. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a liquid fertilizer filling device suitable for different volumes, aiming to improve the problem that the existing technology cannot solve the problem of pumping liquid fertilizer into the filling head for filling.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a liquid fertilizer filling device suitable for different volumes, comprising a housing, wherein multiple pressure pumps are fixedly connected to the rear end of the housing, a connecting pipe 1 is connected to the rear side of the pressure pump, a fertilizer delivery pipe is connected to the rear end of the connecting pipe 1, a connecting pipe 2 is connected to the front side of the pressure pump near the middle, a hollow pipe is connected to the front side of each of the multiple connecting pipe 2s, multiple connecting pipe 3s are connected to the front side of each of the hollow pipes, a fertilizer delivery hose is connected to the top of each connecting pipe 3, a fixed pipe is connected to the other end of each fertilizer delivery hose, a filling head is connected to the other end of the fixed pipe, and a lifting mechanism is provided inside the housing for lifting operations.

[0006] The above technical solution comprises a main body, with multiple pressure pumps fixedly connected to the rear end of the body. These pressure pumps are interconnected via a connecting pipe, the rear end of which is connected to a fertilizer delivery pipe for conveying fertilizer into the pressure pumps. Each pressure pump has a connecting pipe connected to its front end near the center, and the front end of each connecting pipe is connected to a hollow pipe. The front end of each hollow pipe is connected to multiple connecting pipes, the top of which is connected to a fertilizer delivery hose. The other end of each fertilizer delivery hose is connected to a fixed pipe, and the other end of the fixed pipe is connected to a filling head for accurately filling the fertilizer into the target container. Furthermore, the interior of the body is equipped with a lifting mechanism for adjusting the height of the filling head to accommodate containers of different heights.

[0007] As a further description of the above technical solution:

[0008] The lifting mechanism includes a connecting rod, the bottom of which is fixedly connected to the bottom of the inner wall of the housing, and a cylinder is fixedly connected to the top of the connecting rod near the middle. A lifting rod is fixedly connected to the top of the cylinder, and multiple cylindrical sleeves are fixedly connected inside the lifting rod. A guide rod is slidably connected to the inner wall of the cylindrical sleeve. A lifting rod is fixedly connected to the front side of the lifting rod.

[0009] The above technical solution involves a lifting mechanism comprising a connecting rod whose bottom is fixedly connected to the bottom of the inner wall of the housing, ensuring the stability of the connecting rod and providing a solid foundation for the entire lifting mechanism. Near the center of the top of the connecting rod, a cylinder is fixedly connected. This cylinder is one of the core components of the lifting mechanism, responsible for providing the lifting power. The top of the cylinder is fixedly connected to lifting rod one. Lifting rod one has multiple cylindrical sleeves fixedly connected inside, with guide rods slidably connected to the inner walls of these sleeves. The guide rods ensure that lifting rod one maintains the correct direction and position during lifting, preventing it from deviating from the predetermined path. Furthermore, lifting rod two is fixedly connected to the front of lifting rod one, working in conjunction with lifting rod one to complete the lifting task.

[0010] As a further description of the above technical solution:

[0011] The bottom of the fertilizer delivery hose is fixedly connected to a connector, and the bottom of the connector is rotatably connected to the top of the connecting pipe.

[0012] Through the above technical solution: the bottom of the fertilizer delivery hose is fixedly connected to a connector, the bottom part of which is connected to the top part of the connecting pipe three by a rotating connection, so that the entire fertilizer delivery system can flexibly adjust its angle and move its position during operation to adapt to different fertilization needs and terrain conditions.

[0013] As a further description of the above technical solution:

[0014] The hollow tube has a circular groove inside, and the pressure pump is fixedly connected to a base at its bottom.

[0015] The above technical solution involves creating a circular groove in the internal structure of the hollow tube, and the bottom of the pressure pump is securely fixed to a base. This connection method ensures the stability and reliability of the pressure pump during operation.

[0016] As a further description of the above technical solution:

[0017] The rear side of the fixed tube is connected to a second connector, and the other end of the second connector is connected to the top of the fertilizer delivery hose.

[0018] Through the above technical solution: the rear part of the fixed pipe is connected to the second connector, which ensures the smooth connection between the fixed pipe and the subsequent components. The second connector, as a transition component, is connected at its other end to the top of the fertilizer conveying hose, thereby realizing the effective connection between the fertilizer conveying hose and the fixed pipe. This structural design not only ensures the sealing and stability of the conveying system, but also facilitates maintenance and replacement during actual use.

[0019] As a further description of the above technical solution:

[0020] A fixing ring is fixedly connected to the bottom of the inner wall of the box near the middle, and the inner wall of the fixing ring is fixedly connected to the bottom of the outer wall of the connecting rod.

[0021] Through the above technical solution: a fixing ring is fixedly connected to the bottom of the inner wall of the box near the center. The inner wall of the fixing ring and the bottom of the outer wall of the connecting rod are firmly connected through a corresponding fixing method.

[0022] As a further description of the above technical solution:

[0023] The rear end of the box is rotatably connected to a rear cover, the upper front end of the box is fixedly connected to a top cover door, the left side of the front of the top cover door is fixedly connected to a display screen, the upper front end of the top front end of the top cover door is fixedly connected to multiple indicator lights, and the lower front end of the top cover door is fixedly connected to a knob.

[0024] Through the above technical solution: the rear end of the enclosure is connected to a rear cover by rotation, facilitating inspection and maintenance of the interior. Simultaneously, a top cover door is fixedly connected to the upper front part of the enclosure, protecting the internal components. Furthermore, a display screen is fixedly connected to the left side of the front of the top cover door, displaying the device's operating status and various parameters in real time for user monitoring and operation. Multiple indicator lights are also fixedly connected to the upper front part of the top cover door, using different colors and flashing patterns to indicate different operating states, providing intuitive feedback to the user. Finally, a knob is fixedly connected to the lower front part of the top cover door, making operation even more convenient.

[0025] As a further description of the above technical solution:

[0026] A lower cover door is fixedly connected to the middle of the front side of the box body, a workbench is fixedly connected to the front side of the lower cover door, and a baffle is fixedly connected to the top of the workbench.

[0027] Through the above technical solution: a lower cover door is fixedly connected to the middle front part of the box body in a fixed manner. This lower cover door is located at the bottom of the box body, making it convenient for users to open and close. Then, a workbench is also fixedly connected to the front part of the lower cover door. The workbench provides users with a convenient flat surface for placing items. In addition, in order to prevent items from sliding off the workbench, a baffle is fixedly connected to the top of the workbench to ensure the safety of the items.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the pressure pump first draws the fertilizer through the fertilizer delivery pipe into the first connecting pipe, then from the first connecting pipe into the second connecting pipe, and into the hollow pipe. At this time, the fertilizer accumulates in the hollow pipe, and then enters the multiple connectors through the third connecting pipe. Then, the fertilizer is delivered to the fixed pipe through the fertilizer delivery hose, and then delivered to the filling head through the fixed pipe. At this time, the bag is placed on the worktable, and the fertilizer is added into the bag through the filling head. After filling is completed, the filling head is closed, and the fertilizer will not fall. This achieves the effect of drawing fertilizer through the fertilizer delivery pipe into the filling head for filling by the pressure pump.

[0030] 2. In this utility model, when the filling head is too high or too low, the cylinder is opened, which will drive the lifting rod one to move up and down. At the same time, the cylindrical sleeve inside the lifting rod one will move up and down on the guide rod. At this time, the lifting rod one drives the lifting rod two to move up and down, and the lifting rod two will drive the filling head to move up and down for adjustment. This achieves the effect of adjusting the height of the filling head by the cylinder when the position is too high or too low. Attached Figure Description

[0031] Figure 1 This is a front perspective view of a liquid fertilizer filling device suitable for different volumes proposed in this utility model.

[0032] Figure 2 This is a rear perspective view of a liquid fertilizer filling device suitable for different volumes proposed in this utility model.

[0033] Figure 3 This is a partial structural exploded view of the lifting rod of a liquid fertilizer filling device suitable for different volumes proposed in this utility model.

[0034] Figure 4 This is a partial structural diagram of a hollow tube for a liquid fertilizer filling device of different volumes proposed in this utility model.

[0035] Figure 5 This is a partial structural breakdown diagram of a pressure pump for a liquid fertilizer filling device of different volumes proposed in this utility model.

[0036] Legend:

[0037] 1. Box body; 2. Lifting mechanism; 201. Connecting rod; 202. Cylinder; 203. Lifting rod one; 204. Cylindrical sleeve; 205. Lifting rod two; 206. Guide rod; 3. Fertilizer conveying pipe; 4. Connecting pipe one; 5. Pressure pump; 6. Connecting pipe two; 7. Hollow pipe; 8. Connecting pipe three; 9. Fertilizer conveying hose; 10. Fixing pipe; 11. Filling head; 12. Connector one; 13. Circular groove; 14. Base; 15. Connector two; 16. Fixing ring; 17. Rear cover; 18. Indicator light; 19. Knob; 20. Top cover door; 21. Display screen; 22. Bottom cover door; 23. Baffle; 24. Workbench. Detailed Implementation

[0038] 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.

[0039] Please see the appendix Figure 1 Appendix Figure 4 and attached Figure 5 This utility model provides an embodiment of a liquid fertilizer filling device suitable for different volumes, including a housing 1. Multiple pressure pumps 5 are fixedly connected to the rear end of the housing 1 to extract liquid fertilizer. A connecting pipe 4 is connected to the rear side of each pressure pump 5, and a fertilizer delivery pipe 3 is connected to the rear end of the connecting pipe 4. A connecting pipe 6 is connected to the front side of each pressure pump 5 near the middle to deliver the liquid fertilizer. Hollow pipes 7 are connected to the front side of each of the multiple connecting pipes 2 6, and multiple connecting pipes 3 8 are connected to the front side of each of the hollow pipes 7. A fertilizer delivery hose 9 is connected to the top of each of the connecting pipes 3 8, and a fixed pipe 10 is connected to the other end of each fertilizer delivery hose 9, providing a fixed support. A filling head 11 is connected to the other end of the fixed pipe 10 for filling. A lifting mechanism 2 is installed inside the housing 1 for lifting operations.

[0040] Specifically, its main components include a housing 1, the rear end of which is fixedly connected to multiple pressure pumps 5. The rear sides of these pressure pumps 5 are interconnected through a connecting pipe 1 4. The rear end of the connecting pipe 1 4 is connected to a fertilizer delivery pipe 3 for delivering fertilizer to the pressure pumps 5. The front side of each pressure pump 5 is connected to a connecting pipe 2 6 near the middle. The front side of these connecting pipes 2 6 is connected to a hollow pipe 7. The front side of the hollow pipe 7 is connected to multiple connecting pipes 3 8. The top of these connecting pipes 3 8 is connected to a fertilizer delivery hose 9. The other end of the fertilizer delivery hose 9 is connected to a fixed pipe 10. The other end of the fixed pipe 10 is connected to a filling head 11 for accurately filling fertilizer into the target container. In addition, the housing 1 is equipped with a lifting mechanism 2 for lifting operations to adjust the height of the filling head 11 to accommodate containers of different heights.

[0041] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 The lifting mechanism 2 includes a connecting rod 201. The bottom of the connecting rod 201 is fixedly connected to the bottom of the inner wall of the housing 1. A cylinder 202 is fixedly connected to the top of the connecting rod 201 near the middle. The cylinder 202 can lift up and down. A lifting rod 203 is fixedly connected to the top of the cylinder 202. Multiple cylindrical sleeves 204 are fixedly connected inside the cylinder 202 to make the connection more stable. A guide rod 206 is slidably connected to the inner wall of the cylindrical sleeve 204. A lifting rod 205 is fixedly connected to the front side of the lifting rod 203.

[0042] Specifically, the lifting mechanism 2 includes a connecting rod 201. The bottom of the connecting rod 201 is fixedly connected to the bottom of the inner wall of the housing 1, ensuring the stability of the connecting rod 201 and thus providing a solid foundation for the entire lifting mechanism 2. Near the middle of the top of the connecting rod 201, a cylinder 202 is fixedly connected. This cylinder 202 is one of the core components of the lifting mechanism 2, responsible for providing the lifting power. The top of the cylinder 202 is fixedly connected to the lifting rod 1 203. Multiple cylindrical sleeves 204 are fixedly connected inside the lifting rod 1 203. Guide rods 206 are slidably connected to the inner walls of these cylindrical sleeves 204. The function of the guide rods 206 is to ensure that the lifting rod 1 203 maintains the correct direction and position during the lifting process and prevents it from deviating from the predetermined path. In addition, a lifting rod 205 is fixedly connected to the front side of the lifting rod 1 203. The lifting rod 205 works in conjunction with the lifting rod 1 203 to complete the lifting task. The design of the entire lifting mechanism 2 takes into account stability and precision, making the lifting process both smooth and reliable.

[0043] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 4The bottom of the fertilizer delivery hose 9 is fixedly connected to a connector 12. The bottom of connector 12 is rotatably connected to the top of the connecting pipe 3 8, making the whole structure more stable. The hollow tube 7 has a circular groove 13 inside. The bottom of the pressure pump 5 is fixedly connected to a base 14, which improves the overall stability. The rear side of the fixed pipe 10 is connected to a connector 2 15. The other end of connector 2 15 is connected to the top of the fertilizer delivery hose 9, making the overall connection more stable.

[0044] Specifically, the bottom of the fertilizer delivery hose 9 is fixedly connected to a connector 12. The bottom part of this connector 12 is connected to the top part of the connecting pipe 3 8 by a rotating connection, so that the entire fertilizer delivery system can flexibly adjust its angle and position during operation to adapt to different fertilization needs and terrain conditions. A circular groove 13 is opened in the internal structure of the hollow tube 7. The bottom of the pressure pump 5 is firmly fixed to a base 14. This connection method ensures the stability and reliability of the pressure pump 5 during operation. The rear part of the fixed pipe 10 is connected to the connector 2 15, ensuring smooth connection between the fixed pipe 10 and subsequent components. The connector 2 15 serves as a transition component, and its other end is connected to the top of the fertilizer delivery hose 9, thereby achieving effective communication between the fertilizer delivery hose 9 and the fixed pipe 10. This structural design not only ensures the sealing and stability of the delivery system, but also facilitates maintenance and replacement during actual use.

[0045] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 5 A fixing ring 16 is fixedly connected to the bottom of the inner wall of the box 1 near the middle. The inner wall of the fixing ring 16 is fixedly connected to the bottom of the outer wall of the connecting rod 201. A rear cover 17 is rotatably connected to the rear end of the box 1. An upper cover door 20 is fixedly connected to the upper front side of the box 1, which serves as a protection function. A display screen 21 is fixedly connected to the left side of the front of the upper cover door 20. Multiple indicator lights 18 are fixedly connected to the upper front side of the upper cover door 20 for indication. A knob 19 is fixedly connected to the lower front side of the upper cover door 20. A lower cover door 22 is fixedly connected to the middle of the front side of the box 1. A workbench 24 is fixedly connected to the front of the lower cover door 22, which can be placed on the workbench 24 for operation. A baffle 23 is fixedly connected to the top of the workbench 24, which serves as a barrier.

[0046] Specifically, a fixing ring 16 is fixedly connected to the bottom of the inner wall of the housing 1 near the center. The inner wall of the fixing ring 16 is firmly connected to the bottom of the outer wall of the connecting rod 201 through a corresponding fixing method. A rear cover 17 is connected to the rear end of the housing 1 by rotation, which facilitates the inspection and maintenance of the interior of the housing 1. At the same time, a top cover door 20 is fixedly connected to the upper front part of the housing 1. The presence of the top cover door 20 can protect the components inside the housing 1. In addition, a display screen 21 is fixedly connected to the left side of the front of the top cover door 20. The display screen 21 can display the working status and various parameters of the equipment in real time, which is convenient for users to monitor and operate. Multiple indicator lights 18 are also fixedly connected to the upper front part of the top cover door 20. These indicator lights 18 can indicate different working states of the device through different colors and flashing patterns, providing intuitive feedback to users. Finally, a knob 19 is fixedly connected to the lower front part of the upper cover door 20, making operation more convenient. A lower cover door 22 is fixedly connected to the middle front part of the box 1 in a fixed manner. This lower cover door 22 is located below the box 1, making it easy for users to open and close. Next, a workbench 24 is also fixedly connected to the front part of the lower cover door 22. The workbench 24 provides users with a convenient flat surface for placing items. In addition, in order to prevent items from slipping off the workbench 24, a baffle 23 is fixedly connected to the top of the workbench 24 to ensure the safety of the items.

[0047] Working principle: First, the pressure pump 5 draws fertilizer through the fertilizer delivery pipe 3 into the connecting pipe 4, then from the connecting pipe 4 into the connecting pipe 6, and from the connecting pipe 6 into the hollow pipe 7. At this time, the fertilizer accumulates in the hollow pipe 7. Then, the fertilizer in the hollow pipe 7 enters multiple connectors 12 through the connecting pipe 3 8. Then, the connectors 12 deliver the fertilizer through the fertilizer delivery hose 9 into the fixed pipe 10, and through the fixed pipe 10 to the filling head 11. At this time, the bag is placed on the workbench 24, and the filling head 11 is opened. At this time, the fertilizer is added into the bag through the filling head 11. After filling is completed, the filling head 11 is closed. At this time, the filling head 11 is closed, and the fertilizer will not fall. This achieves the effect of the pressure pump 5 drawing fertilizer through the fertilizer delivery pipe 3 into the filling head 11 for filling.

[0048] When the filling head 11 is too high or too low, the cylinder 202 is opened. The cylinder 202 will drive the lifting rod 203 to move up and down. At the same time, the cylindrical sleeve 204 inside the lifting rod 203 will move up and down on the guide rod 206. At this time, the lifting rod 203 will drive the lifting rod 205 to move up and down. The lifting rod 205 will drive the filling head 11 to adjust its height. This achieves the effect of adjusting the height of the filling head 11 by the cylinder 202 when it is too high or too low.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid fertilizer filling device suitable for different volumes, comprising a box (1), characterized in that: Multiple pressure pumps (5) are fixedly connected to the rear end of the box (1). The rear side of the pressure pump (5) is connected to a connecting pipe (4). The rear end of the connecting pipe (4) is connected to a fertilizer delivery pipe (3). The front side of the pressure pump (5) is connected to a connecting pipe (6) near the middle. The front side of the multiple connecting pipes (6) is connected to a hollow pipe (7). The front side of the hollow pipe (7) is connected to multiple connecting pipes (8). The top of the connecting pipes (8) is connected to a fertilizer delivery hose (9). The other end of the fertilizer delivery hose (9) is connected to a fixed pipe (10). The other end of the fixed pipe (10) is connected to a filling head (11). The box (1) is equipped with a lifting mechanism (2). The lifting mechanism (2) is used for lifting operations.

2. A liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: The lifting mechanism (2) includes a connecting rod (201). The bottom of the connecting rod (201) is fixedly connected to the bottom of the inner wall of the box (1). A cylinder (202) is fixedly connected to the top of the connecting rod (201) near the middle. A lifting rod (203) is fixedly connected to the top of the cylinder (202). Multiple cylindrical sleeves (204) are fixedly connected inside the cylinder (204). A guide rod (206) is slidably connected to the inner wall of the cylindrical sleeve (204). A lifting rod (205) is fixedly connected to the front side of the lifting rod (203).

3. The liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: The bottom of the fertilizer delivery hose (9) is fixedly connected to a connector (12), and the bottom of the connector (12) is rotatably connected to the top of the connecting pipe (8).

4. The liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: The hollow tube (7) has a circular groove (13) inside, and the pressure pump (5) is fixedly connected to a base (14).

5. The liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: The rear side of the fixed tube (10) is connected to a connector two (15), and the other end of the connector two (15) is connected to the top of the fertilizer delivery hose (9).

6. A liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: A fixing ring (16) is fixedly connected to the bottom of the inner wall of the box (1) near the middle, and the inner wall of the fixing ring (16) is fixedly connected to the bottom of the outer wall of the connecting rod (201).

7. A liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: The rear end of the box (1) is rotatably connected to a rear cover (17), the upper front end of the box (1) is fixedly connected to a top cover door (20), the left side of the front of the top cover door (20) is fixedly connected to a display screen (21), the upper front end of the top cover door (20) is fixedly connected to multiple indicator lights (18), and the lower front end of the top cover door (20) is fixedly connected to a knob (19).

8. The liquid fertilizer filling device suitable for different volumes according to claim 1, characterized in that: A lower cover door (22) is fixedly connected to the middle of the front side of the box (1), a workbench (24) is fixedly connected to the front side of the lower cover door (22), and a baffle (23) is fixedly connected to the top of the workbench (24).

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