Liquid fertilizer supply device and supply method for vegetable planting

Abstract

The invention relates to the technical field of vegetable planting, and particularly discloses a liquid fertilizer supply device for vegetable planting and a supply method.The device comprises a liquid mixing box and a supply mechanism, the bottom of the liquid mixing box is connected with the supply mechanism through a liquid supply pipe, and a booster pump is arranged on the side, close to the supply mechanism, of a liquid supply valve on the liquid supply pipe; a first liquid level sensor is arranged in the liquid mixing box, a weight sensor is arranged at the bottom of the liquid mixing box, the top of the liquid mixing box is connected with at least two liquid storage boxes through liquid inlet pipes, liquid inlet valves and flow meters are arranged on the liquid inlet pipes, feeding ports are formed in the tops of the liquid storage boxes, and second liquid level sensors are arranged in the liquid storage boxes. The feeding mechanism comprises a transverse pipe, a distributing pipe, a water supply pipe and a feeding pipe. According to the invention, the pipeline structure of the feeding mechanism is improved, so that the final water supply or nutrient supply is more balanced, and the purpose of balanced growth of vegetable crops in the whole greenhouse is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vegetable planting, in particular to a liquid fertilizer supply device and method for vegetable planting. BACKGROUND

[0002] Vegetables are an indispensable food in people's daily life, and are the main source of vitamins, minerals and dietary fiber necessary for maintaining human health. In recent years, in order to improve the yield of vegetables, automated planting technology such as greenhouse planting has been gradually applied. In the process of greenhouse planting, multiple devices need to be coordinated, such as seeding devices, environmental monitoring devices, irrigation devices, nutrient supply devices, etc. to promote the normal growth of vegetable crops. These devices play an important role in the corresponding link, among which water and nutrients are important factors affecting the normal growth of vegetable crops.

[0003] For example, a liquid fertilizer supply device and planting method for vegetable planting are disclosed in Chinese patent publication No. CN114868509A, wherein the device includes a liquid mixing tank and a liquid discharge pipe connected to the bottom of the liquid mixing tank. One end of the liquid discharge pipe is communicated with a feeding mechanism; the feeding mechanism includes two horizontal pipes symmetrically arranged at both ends of the planting area, two first branch pipes are communicated on both sides of the bottom of each horizontal pipe, two groups of first branch pipes symmetrically arranged are communicated through a first liquid supply pipe, four second branch pipes are communicated on both sides of the bottom of each horizontal pipe, the arrangement of the first branch pipe and the first liquid supply pipe can realize comprehensive watering of the planting area, and the cooperation of the second branch pipe and the second liquid supply pipe can realize comprehensive feeding of the seeds on the planting area. The arrangement of the two horizontal pipes can make the two ends of the first liquid supply pipe and the second liquid supply pipe supply liquid at the same time, solve the problem of insufficient supply of the existing liquid fertilizer supply device, and ensure that the flow of the planting area without liquid supply port is uniform.

[0004] However, the pipeline structure in this patent is still unreasonable, resulting in uneven pressure and uneven irrigation or nutrient supply, which affects the growth balance of the overall vegetable crops in the greenhouse. SUMMARY

[0005] To solve the problem of uneven irrigation and nutrient supply in the prior art, the present application provides a liquid fertilizer supply device and method for vegetable planting.

[0006] The technical solution adopted by the present application is:

[0007] A liquid fertilizer supply device for vegetable planting,

[0008] including a liquid mixing tank and a feeding mechanism, the bottom of the liquid mixing tank is connected to the feeding mechanism through a liquid supply pipe, a booster pump is arranged on one side of the liquid supply valve close to the feeding mechanism on the liquid supply pipe;

[0009] The mixing tank is provided with a liquid level sensor one, the bottom of the mixing tank is provided with a weight sensor, the top of the mixing tank is connected with at least two liquid storage tanks through liquid inlet pipes respectively, the liquid inlet pipes are provided with liquid inlet valves and flow meters respectively, the top of the liquid storage tank is provided with a feeding port, and the liquid storage tank is provided with a liquid level sensor two.

[0010] The feeding mechanism comprises horizontal pipes symmetrically arranged on both sides of the planting area, and the top of the two horizontal pipes is communicated with a distribution pipe, and the other end of the distribution pipe is communicated with a liquid supply pipe through a three-way pipe, and the two distribution pipes are symmetrically arranged with the three-way pipe as the center, and the liquid supply pipe is provided with a liquid supply valve; the bottom of the two ends of the two horizontal pipes is provided with a water supply pipe, and the two ends of the water supply pipe are communicated with the two horizontal pipes respectively, and the top of the water supply pipe is provided with a plurality of water supply nozzles; the two sides of the water supply pipe are respectively provided with a feeding pipe, and the two ends of the feeding pipe are respectively communicated with the two horizontal pipes, and the bottom of the feeding pipe is provided with a plurality of feeding nozzles; the two ends of the water supply pipe are respectively provided with a water supply valve, and the two ends of the feeding pipe are respectively provided with a feeding valve.

[0011] Preferably, the horizontal height of the water supply pipe is higher than that of the feeding pipe.

[0012] Preferably, the top of the two ends of the water supply pipe is respectively communicated with a vertically arranged piston pipe, the piston pipe is provided with a piston, the top of the piston is provided with a connecting rod, the top of the two connecting rods on the same water supply pipe is connected with a cover plate, and the bottom of the cover plate is provided with a plurality of plug blocks matched with the water supply nozzles.

[0013] Preferably, the water supply nozzle is in a hollow columnar structure, the plug block is in a columnar structure, the outer diameter of the plug block is smaller than the inner diameter of the water supply nozzle, the bottom of the plug block is provided with a water guide block, the two sides of the water guide block are inclined to form a structure with wide upper end and narrow lower end, the two sides of the water guide block are symmetrically arranged with the axis of the water supply pipe as the center, and the two sides of the water guide block are provided with a radial water guide groove with the midpoint of the bottom as the center.

[0014] Preferably, the top center of the mixing tank is provided with a servo motor, the inside center of the mixing tank is provided with a stirring shaft arranged vertically, the top end of the stirring shaft is rotationally connected with the inside top of the mixing tank and extends to the outside of the mixing tank and is coaxially connected with the output shaft of the servo motor, and the circumferential side of the stirring shaft is provided with stirring blades.

[0015] Preferably, the liquid fertilizer supply device for vegetable planting further comprises a controller, the controller is connected with the liquid inlet valve, the flow meter, the liquid supply valve, the booster pump, the water supply valve, the feeding valve and the servo motor, the water supply valves are connected in parallel, and the feeding valves are connected in parallel.

[0016] A liquid fertilizer supply method for vegetable planting, used in a liquid fertilizer supply device for vegetable planting as described above, comprising a water supply method and a material supply method, wherein the water supply method comprises the following steps:

[0017] S10, selecting one of the liquid storage tanks as a water supply tank, and adding water to the water supply tank to reach a required liquid level;

[0018] S11, opening the liquid inlet valve on the liquid inlet pipe of the water supply tank, and supplying water to the mixing tank, reading the flow data of the flow meter, and closing the liquid inlet valve when the required water supply amount is reached;

[0019] S12, opening the liquid supply valve on the liquid supply pipe, the booster pump, the water supply valve on the water supply pipe, and closing the material supply valve on the material supply pipe, so that water enters the water supply pipe through the mixing tank, the liquid supply pipe, the material distribution pipe, and the cross pipe, and is sprayed to the leaf part of the vegetable by the water supply spray head on the water supply pipe;

[0020] S13, reading the liquid level data of the liquid level sensor one in the mixing tank, and closing the liquid supply valve on the liquid supply pipe, the booster pump, and the water supply valve on the water supply pipe after the water in the mixing tank is exhausted, and stopping water supply;

[0021] The material supply method comprises the following steps:

[0022] S20, adding water to the water supply tank, and adding the required liquid fertilizer to the remaining liquid storage tanks to reach the required liquid level;

[0023] S21, opening the liquid inlet valve on the liquid inlet pipe, closing the liquid supply valve on the liquid supply pipe, the booster pump, the water supply valve on the water supply pipe, and the material supply valve on the material supply pipe, controlling the amount of water and liquid fertilizer added to the mixing tank according to the flow data read by the flow meter according to the ratio of water to liquid fertilizer, then closing the liquid inlet valve on the liquid inlet pipe, wherein the water is first added in an amount of 80% to 90% of the ratio;

[0024] S22, starting the servo motor to stir the liquid in the mixing tank;

[0025] S23, after the stirring is completed, opening the liquid supply valve on the liquid supply pipe, the booster pump, and the material supply valve on the material supply pipe, and the liquid in the liquid storage tank enters the material supply pipe through the liquid supply pipe, the material distribution pipe, and the cross pipe, and is sprayed to the root part of the vegetable by the material supply spray head on the material supply pipe;

[0026] S24, reading the liquid level data of the liquid level sensor one in the mixing tank, and closing the liquid supply valve on the liquid supply pipe, the booster pump, and the material supply valve on the material supply pipe after the liquid in the mixing tank is exhausted, opening the liquid inlet valve on the liquid inlet pipe of the water supply tank, and adding the remaining water according to the ratio, then closing the liquid inlet valve on the liquid inlet pipe of the water supply tank;

[0027] S25, starting the servo motor to stir the liquid in the mixing tank;

[0028] S26, after the stirring is completed, opening the liquid supply valve and the booster pump on the liquid supply pipe and the feed valve on the feed pipe, the liquid in the liquid storage tank enters the feed pipe through the liquid supply pipe, the distribution pipe and the cross pipe, and is sprayed to the root of the vegetables by the feed nozzle on the feed pipe;

[0029] S27, reading the liquid level data of the liquid level sensor one in the mixing tank, after the liquid in the mixing tank is exhausted, closing the liquid supply valve and the booster pump on the liquid supply pipe and the feed valve on the feed pipe, and stopping the feeding.

[0030] Preferably, in step S23 and step S26, the following steps are further included:

[0031] After the stirring is completed, reading the liquid level data of the liquid level sensor one in the mixing tank and the weight data of the weight sensor at the bottom of the mixing tank, calculating the liquid density in the mixing tank, and adjusting the boost of the booster pump according to the liquid density.

[0032] The beneficial effects of the present application are:

[0033] 1. The pipeline structure of the feeding mechanism is improved, the liquid is supplied from the liquid supply pipe to the cross pipe through the three-way pipe, and the lengths of the distribution pipes are the same, so that the liquid pressures in the two cross pipes are as close as possible, so that the final water supply or nutrient supply is more balanced, and the balanced growth of the vegetable crops in the whole greenhouse is achieved.

[0034] 2. The liquid level sensor one in the mixing tank can detect the liquid level height, the liquid volume in the mixing tank can be calculated according to the cross-sectional area of the mixing tank, and the liquid density can be calculated according to the corresponding liquid mass detected by the weight sensor, so that the boost of the booster pump is adjusted according to the liquid density. The greater the liquid density, the greater the boost, so that the planned range can be stably covered when spraying liquid with different densities.

[0035] 3. When water is supplied, the piston is lifted by water pressure, the plug is lifted from the water supply nozzle, the water sprayed from the water supply nozzle is divided into two sides through the V-shaped structure of the plug, and is guided and dispersed by the radial water guide groove, so that the vegetable crops on both sides are uniformly irrigated. After irrigation is completed, the piston is lowered under its own action, the plug is reset into the water supply nozzle, the water supply nozzle is protected by the plug, and the water supply nozzle is prevented from being clogged by debris for a long time.

[0036] 4. When the nutrients are mixed and stirred during nutrient supply, the water is added in two times, most of the water is mixed with the liquid fertilizer for supply, and then the remaining water is used to stir and clean the mixture, and the remaining water is sprayed through the feed pipe to clean the liquid supply pipe, the distribution pipe, the cross pipe and the feed pipe. Compared with only discharging the remaining liquid, the cleaning effect is better, and cross infection is better avoided. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is the front view structural schematic drawing of the liquid fertilizer supply device for vegetable planting in the embodiment of the application;

[0038] Figure 2 It is the top view structural schematic drawing of the mixing box in the embodiment of the application;

[0039] Figure 3 It is the top view structural schematic drawing of the feeding mechanism in the embodiment of the application;

[0040] Figure 4 It is the internal enlarged structural schematic drawing of the part A in the Figure 1

[0041] Figure 5 It is the flow chart of the water supply method in the embodiment of the application;

[0042] Figure 6 It is the flow chart of the feeding method in the embodiment of the application;

[0043] The figure mark: 1, mixing tank, 2, liquid supply pipe, 3, liquid inlet pipe, 4, liquid storage tank, 5, liquid inlet valve, 6, flow meter, 7, feeding port, 8, cross pipe, 9, distribution pipe, 10, liquid supply valve, 11, water supply pipe, 12, water supply nozzle, 13, feeding pipe, 14, feeding nozzle, 15, water supply valve, 16, feeding valve, 17, booster pump, 18, piston pipe, 19, piston, 20, connecting rod, 21, cover plate, 22, block, 23, water guide groove, 24, servo motor, 25, stirring shaft, 26, stirring blade. DETAILED DESCRIPTION

[0044] The application will be described in detail below in combination with the drawings and embodiments.

[0045] Embodiment

[0046] In order to uniformly irrigate or supply nutrients to the vegetable crops when the greenhouse is planted, as shown in Figure 1 and Figure 2 The embodiment provides a liquid fertilizer supply device for vegetable planting, which comprises a mixing tank 1 and a feeding mechanism, the bottom of the mixing tank 1 is connected with the feeding mechanism through a liquid supply pipe 2, a booster pump 17 is arranged on one side of the liquid supply pipe 2 close to the liquid supply valve 10 of the feeding mechanism;

[0047] A liquid level sensor one is arranged in the mixing tank 1, a weight sensor is arranged at the bottom of the mixing tank 1, at least two liquid storage tanks 4 are connected with the mixing tank 1 through liquid inlet pipes 3 respectively at the top of the mixing tank 1, liquid inlet valves 5 and flow meters 6 are arranged on the liquid inlet pipes 3, feeding ports 7 are arranged at the top of the liquid storage tanks 4, and liquid level sensors two are arranged in the liquid storage tanks 4; ​

[0048] The feeding mechanism comprises two horizontal pipes 8 symmetrically arranged on both sides of the planting area, two distribution pipes 9 are communicated with the top middle of the two horizontal pipes 8, the other end of the two distribution pipes 9 is communicated with the liquid supply pipe 2 through a three-way pipe, the two distribution pipes 9 are symmetrically arranged with the three-way pipe as the center, the liquid supply pipe 2 is provided with a liquid supply valve 10; the bottom of the two ends of the two horizontal pipes 8 is provided with a water supply pipe 11, the two ends of the water supply pipe 11 are respectively communicated with the two horizontal pipes 8, the top of the water supply pipe 11 is provided with a plurality of water supply nozzles 12; the two sides of the water supply pipe 11 are respectively provided with a feeding pipe 13, the two ends of the feeding pipe 13 are respectively communicated with the two horizontal pipes 8, the bottom of the feeding pipe 13 is provided with a plurality of feeding nozzles 14; the two ends of the water supply pipe 11 are respectively provided with a water supply valve 15, the two ends of the feeding pipe 13 are respectively provided with a feeding valve 16.

[0049] The liquid storage tank 4 is used to inject water, liquid fertilizer and the like respectively, in order to avoid cross contamination of the liquid storage tank 4 caused by reuse, preferably, different types of liquid use different liquid storage tanks 4. Before use, one of the liquid storage tanks 4 can be selected as a water supply tank for storing water for irrigation, water can be injected into the water supply tank through the feed inlet 7, liquid fertilizer or required liquid medicine can be injected into the remaining liquid storage tanks 4 through the feed inlet 7, the liquid level is detected by the liquid level sensor two in the liquid storage tank 4, and the injection is stopped when the required liquid level is reached. When irrigating, the liquid inlet valve 5 on the liquid inlet pipe 3 of the water supply tank is opened to transport irrigation water into the mixing tank 1, the flow data of the flowmeter 6 is read, the liquid inlet valve 5 is closed when the required water volume is reached, then the liquid supply valve 10 on the liquid supply pipe 2, the booster pump 17 and the water supply valve 15 on the water supply pipe 11 are opened, and the irrigation water is sprayed from the water supply nozzles 12 through the liquid supply pipe 2, the distribution pipe 9, the horizontal pipe 8 and the water supply pipe 11 to irrigate the vegetable crops. When the liquid level sensor one in the mixing tank 1 detects that the water is exhausted, the liquid supply valve 10 on the liquid supply pipe 2 and the booster pump 17 and the water supply valve 15 on the water supply pipe 11 are closed to stop the water supply irrigation.

[0050] When liquid fertilizer or medicine is supplied, the liquid inlet valve 5 on the liquid inlet pipe 3 of each corresponding liquid storage tank 4 is opened, the liquid fertilizer and water previously injected into the liquid storage tank 4 are added into the mixing tank 1 for mixing, according to the flow data of the flowmeter 6, the corresponding liquid inlet valve 5 is closed when the addition amount according to the proportioning is reached, after the liquid in the mixing tank 1 is mixed, the liquid supply valve 10 on the liquid supply pipe 2, the booster pump 17 and the feeding valve 16 on the feeding pipe 13 are opened, and the mixed liquid is sprayed from the feeding nozzles 14 through the liquid supply pipe 2, the distribution pipe 9, the horizontal pipe 8 and the feeding pipe 13 to supply nutrients and fertilizer to the vegetable crops. When the liquid level sensor one in the mixing tank 1 detects that the liquid is exhausted, the liquid supply valve 10, the booster pump 17 and the feeding valve 16 are closed.

[0051] Due to the optimized pipeline design, the distance from the mixing tank 1 to the two horizontal pipes 8 is the same, and the hydraulic pressure is also the same. This prevents a situation where one end of the water supply pipe 11 and the feed supply pipe 13 has high hydraulic pressure while the other end has low hydraulic pressure. The water supply nozzles 12 and feed supply nozzles 14 are evenly distributed on the water supply pipes 11 and 13, resulting in more uniform liquid spraying. Furthermore, generally speaking, irrigation is best done from top to bottom for the entire vegetable crop, while nutrient supply is best sprayed directly onto the roots for better absorption and transport to other parts. Therefore, the water supply nozzles 12 are positioned upwards, and the feed supply nozzles 14 are positioned downwards.

[0052] The booster pump 17 pressurizes the liquid in the liquid supply pipe 2, the distribution pipe 9, the horizontal pipe 8, the water supply pipe 11, and the material supply pipe 13, so that the liquid sprayed from the water supply nozzle 12 and the material supply nozzle 14 can cover the planned area.

[0053] Generally speaking, water density is relatively stable. During irrigation, the water pressure required to achieve stable coverage of the planned area is also relatively stable and does not fluctuate significantly. However, when supplying liquid fertilizers or pesticides, the different types of liquids may cause differences in liquid density during mixing. Without considering changes in liquid viscosity, the hydraulic pressure required to stably cover the planned area will also differ. Therefore, the liquid level can be detected by a level sensor in the mixing tank 1. By combining this with the cross-sectional area of ​​the mixing tank, the liquid volume in the mixing tank 1 can be calculated. Then, by combining this with the corresponding liquid mass detected by a weight sensor, the liquid density can be calculated. Thus, the pressure boosting level of the booster pump 17 can be adjusted according to the liquid density; the higher the liquid density, the greater the pressure boosting level.

[0054] To prevent the liquid sprayed from the feed nozzle 14 from contaminating the water supply nozzle 12, such as Figure 2 As shown, in one embodiment, the water supply pipe 11 is at a higher level than the feed pipe 13.

[0055] Because the water supply nozzle 12 is installed facing upwards, it is easily clogged by dust or other debris if there is a lack of proper protection. To solve this problem, such as Figure 3 As shown, in one embodiment, the top of each end of the water supply pipe 11 is connected to a vertically arranged piston pipe 18. A piston 19 is provided inside the piston pipe 18. A connecting rod 20 is provided at the top of the piston 19. A cover plate 21 is connected between the tops of the two connecting rods 20 on the same water supply pipe 11. A plurality of plugs 22 adapted to the water supply nozzle 12 are provided at the bottom of the cover plate 21.

[0056] With the above structure, during water supply, the water pressure lifts the piston 19, which in turn lifts the cover plate 21 via the connecting rod 20, exposing the plug 22 outside the water supply nozzle 12, allowing the nozzle 12 to begin spraying irrigation. When irrigation is complete and water supply is stopped, the piston 19 loses power and gradually descends to its original position under the weight of the cover plate 21, connecting rod 20, and piston 19. The plug 22 then enters the water supply nozzle 12, working together with the cover plate 21 to protect the nozzle 12.

[0057] To accommodate the blockage 22, the water supply nozzle 12 can simply adopt a hollow cylindrical structure. Of course, the feed nozzle 14 can be a conventional nozzle with uniform spray holes. However, to ensure sufficient coverage of the sprayed irrigation water, such as... Figure 3 As shown, in one embodiment, the blocking block 22 has a columnar structure, and the outer diameter of the blocking block 22 is smaller than the inner diameter of the water supply nozzle 12. The bottom of the blocking block 22 is provided with a water guide block, and the two sides of the water guide block are inclined to form a structure that is wider at the top and narrower at the bottom. The two sides of the water guide block are symmetrically arranged with the axis of the water supply pipe 11 as the center. The two sides of the water guide block are provided with radial water guide grooves 23 with the midpoint of the bottom as the center. The water sprayed from the water supply nozzle 12 flows to both sides through the bottom part of the water guide block and is guided and dispersed by the radial water guide grooves 23 to evenly irrigate the vegetable crops on both sides.

[0058] like Figure 1 As shown, in one embodiment, to enhance the mixing effect of the mixing tank 1, a servo motor 24 is provided at the top center of the mixing tank 1, and a vertically arranged stirring shaft 25 is provided at the inner center of the mixing tank 1. The top end of the stirring shaft 25 is rotatably connected to the inner top of the mixing tank 1 and extends out of the mixing tank 1, coaxially connected to the output shaft of the servo motor 24. Stirring blades 26 are provided around the periphery of the stirring shaft 25. During liquid mixing, the servo motor 24 can be activated to drive the stirring shaft 25 and stirring blades 26 to mix the liquid in the mixing tank 1, thereby improving the mixing uniformity.

[0059] In one embodiment, to facilitate automated control, the liquid fertilizer supply device for vegetable cultivation further includes a controller. The controller is connected to the inlet valve 5, flow meter 6, supply valve 10, booster pump 17, water supply valve 15, feed valve 16, and servo motor 24. The water supply valves 15 are connected in parallel, and the feed valves 16 are also connected in parallel. Automated monitoring and operation can be achieved through the controller, and the parallel connection facilitates troubleshooting.

[0060] For the aforementioned supply device, specific supply methods include water supply methods and material supply methods. The water supply method includes the following steps:

[0061] S10. Select one of the storage tanks as the water supply tank, and fill the water supply tank with water until the required liquid level is reached;

[0062] S11, opening the liquid inlet valve on the liquid inlet pipe of the water supply tank, feeding water into the mixing tank, reading the flow data of the flow meter, and closing the liquid inlet valve when the required water volume is reached;

[0063] S12, opening the liquid supply valve on the liquid supply pipe and the booster pump, and the water supply valve on the water supply pipe, closing the feed supply valve on the feed pipe, and allowing water to pass through the mixing tank, the liquid supply pipe, the feed pipe, the cross pipe, and the water supply pipe, and to be sprayed by the water supply nozzle on the water supply pipe towards the leaves of the vegetables;

[0064] S13, reading the liquid level data of the liquid level sensor one in the mixing tank, and closing the liquid supply valve on the liquid supply pipe and the booster pump, and the water supply valve on the water supply pipe after the water in the mixing tank is exhausted, and stopping water supply.

[0065] The feed method comprises the following steps:

[0066] S20, feeding water into the water supply tank, and feeding the required liquid fertilizer into the remaining liquid storage tanks to reach the required liquid level;

[0067] S21, opening the liquid inlet valve on the liquid inlet pipe, closing the liquid supply valve on the liquid supply pipe and the booster pump, and the water supply valve on the water supply pipe, and the feed supply valve on the feed pipe, controlling the amount of water and liquid fertilizer added to the mixing tank according to the flow data read by the flow meter according to the ratio of water to liquid fertilizer, and then closing the liquid inlet valve on the liquid inlet pipe, wherein the water is first added in an amount of 80% to 90% of the ratio;

[0068] S22, starting the servo motor to stir the liquid in the mixing tank;

[0069] S23, after the stirring is completed, opening the liquid supply valve on the liquid supply pipe and the booster pump, and the feed supply valve on the feed pipe, allowing the liquid in the liquid storage tank to pass through the liquid supply pipe, the feed pipe, and the cross pipe into the feed pipe, and to be sprayed by the feed nozzle on the feed pipe towards the roots of the vegetables;

[0070] S24, reading the liquid level data of the liquid level sensor one in the mixing tank, and closing the liquid supply valve on the liquid supply pipe and the booster pump, and the feed supply valve on the feed pipe after the liquid in the mixing tank is exhausted, opening the liquid inlet valve on the liquid inlet pipe of the water supply tank, and adding the remaining water according to the ratio, and then closing the liquid inlet valve on the liquid inlet pipe of the water supply tank;

[0071] S25, starting the servo motor to stir the liquid in the mixing tank;

[0072] S26, after the stirring is completed, opening the liquid supply valve on the liquid supply pipe and the booster pump, and the feed supply valve on the feed pipe, allowing the liquid in the liquid storage tank to pass through the liquid supply pipe, the feed pipe, and the cross pipe into the feed pipe, and to be sprayed by the feed nozzle on the feed pipe towards the roots of the vegetables;

[0073] S27, reading liquid level data of the liquid level sensor one in the mixing tank, after the liquid in the mixing tank is exhausted, closing the liquid supply valve on the liquid supply pipe and the booster pump and the liquid supply valve on the liquid supply pipe, and stopping the liquid supply.

[0074] In one of the embodiments, the steps S23 and S26 further comprise the following steps:

[0075] After the stirring is completed, reading the liquid level data of the liquid level sensor one in the mixing tank and the weight data of the weight sensor at the bottom of the mixing tank, calculating the liquid density in the mixing tank, and adjusting the pressure boosting of the booster pump according to the liquid density.

[0076] The above embodiments only express the specific implementation of the present application, which is described in a more specific and detailed manner, but it should not be understood as a limitation to the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A liquid fertilizer supply device for vegetable cultivation, characterized in that, Including the mixed liquid tank and the feeding mechanism, the bottom of the mixed liquid tank is connected with the feeding mechanism through the liquid supply pipe, and the liquid supply pipe is provided with a booster pump on the side near the liquid supply valve close to the feeding mechanism; The mixed liquid tank is provided with a liquid level sensor one, the bottom of the mixed liquid tank is provided with a weight sensor, the top of the mixed liquid tank is connected with at least two liquid storage tanks through the liquid inlet pipe respectively, the liquid inlet pipe is provided with a liquid inlet valve and a flow meter, the top of the liquid storage tank is provided with a feeding port, and the liquid storage tank is provided with a liquid level sensor two; The feeding mechanism comprises two horizontal pipes which are symmetrically arranged on both sides of the planting area, the top of the two horizontal pipes is communicated with two distribution pipes, the other end of the two distribution pipes is communicated with the liquid supply pipe through the three-way pipe, the two distribution pipes are symmetrically arranged with the three-way pipe as the center, and the liquid supply pipe is provided with a liquid supply valve; the bottom of the two ends of the two horizontal pipes is provided with a water supply pipe, the two ends of the water supply pipe are communicated with the two horizontal pipes respectively, the top of the water supply pipe is provided with a plurality of water supply nozzles, the two sides of the water supply pipe are respectively provided with a feeding pipe, the two ends of the feeding pipe are communicated with the two horizontal pipes respectively, and the bottom of the feeding pipe is provided with a plurality of feeding nozzles; the two ends of the water supply pipe are respectively provided with a water supply valve, and the two ends of the feeding pipe are respectively provided with a feeding valve.

2. The liquid fertilizer supply apparatus for vegetable cultivation according to claim 1, characterized by The horizontal height of the water supply pipe is higher than that of the feeding pipe.

3. The liquid fertilizer supply apparatus for vegetable cultivation according to claim 2, characterized by The top of the two ends of the water supply pipe is respectively communicated with a vertically arranged piston pipe, the piston pipe is provided with a piston, the top of the piston is provided with a connecting rod, the top of the two connecting rods on the same water supply pipe is connected with a cover plate, and the bottom of the cover plate is provided with a plurality of plug blocks matched with the water supply nozzles.

4. The liquid fertilizer supply apparatus for vegetable cultivation according to claim 3, characterized by The water supply nozzle is in a hollow columnar structure, the plug block is in a columnar structure, and the outer diameter of the plug block is smaller than the inner diameter of the water supply nozzle, the bottom of the plug block is provided with a water guide block, the two sides of the water guide block are inclined to form a structure with a wide upper end and a narrow lower end, the two sides of the water guide block are symmetrically arranged with the axis of the water supply pipe as the center, and the two sides of the water guide block are provided with a radial water guide groove with the midpoint of the bottom as the center.

5. The liquid fertilizer supply apparatus for vegetable cultivation according to claim 4, characterized by The top center of the mixed liquid tank is provided with a servo motor, the inside center of the mixed liquid tank is provided with a stirring shaft arranged in the vertical direction, the top end of the stirring shaft is rotationally connected with the inside top of the mixed liquid tank and extends to the outside of the mixed liquid tank and is coaxially connected with the output shaft of the servo motor, and the periphery of the stirring shaft is provided with stirring blades.

6. The liquid fertilizer supply apparatus for vegetable cultivation according to claim 5, wherein The liquid fertilizer supply device for vegetable planting further comprises a controller, the controller is connected with the liquid inlet valve, the flow meter, the liquid supply valve, the booster pump, the water supply valve, the feeding valve and the servo motor, the water supply valves are connected in parallel, and the feeding valves are connected in parallel.

7. A method for supplying a liquid fertilizer for vegetable cultivation, characterized by, The liquid fertilizer supply device for vegetable planting is used for the water supply method and the feeding method, wherein the water supply method comprises the following steps: S10, one of the liquid storage tanks is selected as a water supply tank, and water is injected into the water supply tank to reach the required liquid level; S11, the liquid inlet valve on the liquid inlet pipe of the water supply tank is opened, water is supplied to the mixed liquid tank, the flow data of the flow meter is read, and when the required water supply amount is reached, the liquid inlet valve is closed; S12, opening the liquid supply valve and the booster pump on the liquid supply pipe and the water supply valve on the water supply pipe, closing the feed pipe supply valve, and allowing water to pass through the mixing tank, the liquid supply pipe, the distribution pipe, the cross pipe, and the water supply pipe, and then sprayed by the water supply nozzle on the water supply pipe to the leaf part of the vegetable; S13, reading the liquid level data of the liquid level sensor one in the mixing tank, and after the water in the mixing tank is exhausted, closing the liquid supply valve and the booster pump on the liquid supply pipe and the water supply valve on the water supply pipe, and stopping water supply; The feed method comprises the following steps: S20, injecting water into the water supply tank, and injecting the required liquid fertilizer into the remaining liquid storage tanks to reach the required liquid level; S21, opening the liquid inlet valve on the liquid inlet pipe, closing the liquid supply valve and the booster pump on the liquid supply pipe and the water supply valve on the water supply pipe, and the feed pipe supply valve, according to the flow data read by the flowmeter, controlling the amount of water and liquid fertilizer added to the mixing tank according to the ratio of water and liquid fertilizer, and then closing the liquid inlet valve on the liquid inlet pipe, wherein the water is first added in an amount of 80% to 90% of the ratio; S22, starting the servo motor to stir the liquid in the mixing tank; S23, after the stirring is completed, opening the liquid supply valve and the booster pump on the liquid supply pipe and the feed pipe supply valve, and allowing the liquid in the liquid storage tank to pass through the liquid supply pipe, the distribution pipe, the cross pipe, and the feed pipe, and then sprayed by the feed nozzle on the feed pipe to the root part of the vegetable; S24, reading the liquid level data of the liquid level sensor one in the mixing tank, and after the liquid in the mixing tank is exhausted, closing the liquid supply valve and the booster pump on the liquid supply pipe and the feed pipe supply valve, opening the liquid inlet valve on the liquid inlet pipe of the water supply tank, adding the remaining water according to the ratio, and then closing the liquid inlet valve on the liquid inlet pipe of the water supply tank; S25, starting the servo motor to stir the liquid in the mixing tank; S26, after the stirring is completed, opening the liquid supply valve and the booster pump on the liquid supply pipe and the feed pipe supply valve, and allowing the liquid in the liquid storage tank to pass through the liquid supply pipe, the distribution pipe, the cross pipe, and the feed pipe, and then sprayed by the feed nozzle on the feed pipe to the root part of the vegetable; S27, reading the liquid level data of the liquid level sensor one in the mixing tank, and after the liquid in the mixing tank is exhausted, closing the liquid supply valve and the booster pump on the liquid supply pipe and the feed pipe supply valve, and stopping the feed.

8. The method for supplying a liquid fertilizer for vegetable cultivation according to claim 7, wherein In steps S23 and S26, the following steps are further included: After the stirring is completed, reading the liquid level data of the liquid level sensor one in the mixing tank and the weight data of the weight sensor at the bottom of the mixing tank, calculating the liquid density in the mixing tank, and adjusting the pressure boost of the booster pump according to the liquid density.

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