Pneumatic fertilizer injection device

Abstract

The utility model discloses a pneumatic fertilizer injection device which comprises a fertilizer tank and an air pump, an air outlet pipe of the air pump is communicated with an air inlet pipe of the fertilizer tank; a feeding hole is formed in the top of the fertilizer tank; the air inlet pipe is inserted into the fertilizer tank and extends to the bottom of a tank body of the fertilizer tank; a water outlet is formed in one side of the bottom of the fertilizer tank, and a water and fertilizer injection pipe is connected to the water outlet and extends into the main pipeline; the main pipeline is connected with irrigation water and used for irrigation and conveying of water and fertilizer. Water and fertilizer in the fertilizer tank are injected into the irrigation main pipeline through air pressure provided by the air pump, on one hand, the air pump is not in direct contact with water and fertilizer liquid, and therefore the problems of corrosion and blockage caused by direct contact of a traditional water pump with the water and fertilizer are solved; on the other hand, compared with a negative pressure suction mode, air pressure is provided by the air pump, pressure loss of the main pipeline cannot be caused, and the irrigation uniformity of the water yield is guaranteed.

Description

Technical Field

[0001] The utility model relates to a fertilizer injection device, in particular to a pneumatic fertilizer injection device. Background Art

[0002] The integrated water and fertilizer technology is a technology that dissolves water-soluble fertilizers in irrigation water and transports them to the soil near the crop roots through the irrigation water conveyance pipeline. The integrated water and fertilizer technology has the advantages of water saving, fertilizer saving, labor saving and yield increase, and has been widely promoted and used at present. At present, there are mainly two ways to inject the water and fertilizer solution into the irrigation pipeline: one is to use a water pump for active injection; the other is to use negative pressure suction. The first way of using a water pump for active injection has the advantages that it will not cause pressure loss of the irrigation water in the main pipeline, and the injection speed of the water and fertilizer solution can be controlled by controlling the flow rate of the water pump. The disadvantages are that it has high requirements for the corrosion resistance of the water pump, generally requiring at least a 304 stainless steel water pump, and has high requirements for the filtration accuracy of the system. Undissolved fertilizers may cause blockage of the water pump. The second way of injecting the water and fertilizer solution by negative pressure suction usually uses the Venturi principle and does not require external power, but it causes greater pressure loss to the main pipeline, affecting the irrigation water output and irrigation uniformity. Summary of the Utility Model

[0003] In order to solve the deficiencies of the above technologies, the utility model provides a pneumatic fertilizer injection device.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pneumatic fertilizer injection device, including a fertilizer tank, and it also includes an air pump;

[0005] The air outlet pipe of the air pump is connected to the air inlet pipe of the fertilizer tank;

[0006] The top of the fertilizer tank is provided with a feed inlet, and the air inlet pipe is inserted into the interior of the fertilizer tank and extends to the bottom of the tank body of the fertilizer tank;

[0007] One side of the bottom of the fertilizer tank is provided with a water outlet, and a water and fertilizer injection pipe is connected to the water outlet, and the water and fertilizer injection pipe is incorporated into the main pipeline;

[0008] The main pipeline is connected to irrigation water and is used for the irrigation and conveyance of water and fertilizer.

[0009] Preferably, the air inlet pipe located at the bottom of the fertilizer tank body is distributed in a disc shape in a surrounding manner, and air outlet holes are evenly arranged on the side surface of the air inlet pipe distributed in a disc shape in a surrounding manner.

[0010] Preferably, the air pump is equipped with an exhaust valve.

[0011] Preferably, a pressure gauge is installed on the air inlet pipe, and the pressure gauge is located at one end where the air inlet pipe is connected to the air outlet pipe of the air pump.

[0012] Preferably, a filter is provided at the water outlet of the fertilizer tank.

[0013] Preferably, a one-way valve is installed on the water and fertilizer injection pipe.

[0014] Preferably, a flow meter is also installed on the water and fertilizer injection pipe, and the flow meter is located downstream of the one-way valve.

[0015] The utility model discloses a pneumatic water and fertilizer injection device, which injects the water and fertilizer in the fertilizer tank into the main irrigation pipeline by using the air pressure provided by an air pump. On the one hand, the air pump does not directly contact the water and fertilizer solution, thus avoiding the corrosion and blockage problems caused by the direct contact between the traditional water pump and the water and fertilizer. On the other hand, compared with the negative pressure suction method, the air pressure provided by the air pump in this device will not cause pressure loss in the main pipeline, ensuring the irrigation uniformity of the water output. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the system composition of the utility model.

[0017] In the figure: 1. Air pump; 2. Exhaust valve; 3. Pressure gauge; 4. Fertilizer tank; 5. Air inlet pipe; 6. Feed inlet; 7. Air outlet hole; 8. Water outlet; 9. Filter screen; 10. One-way valve; 11. Flow meter; 12. Main pipeline; 13. Water and fertilizer injection pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the utility model in detail with reference to the drawings and specific embodiments.

[0019] The utility model discloses a pneumatic fertilizer injection device, and the device system composition is as Figure 1 shown, mainly including an air pump 1, a fertilizer tank 4, and connecting pipelines, pipe fittings and other accessories.

[0020] The fertilizer tank 4 is used to hold water-soluble fertilizers, and is made of carbon steel, nylon or engineering plastics, and can withstand a pressure of more than 10 kg. The mixing and stirring of water-soluble fertilizers can be realized in the fertilizer tank 4, and the water and fertilizer solution is injected into the main pipeline 12 by using the air pressure provided by the air pump.

[0021] The air pump 1 is a commercially available product, and its output air pressure can be manually or automatically set, and it has a gas pressure regulation function to realize the intake air pressure regulation of the fertilizer tank according to the use requirements. And the air pump 1 can be powered by an electric motor or a diesel engine. In order to facilitate field operation without a municipal power supply system, a battery-powered electric motor or a diesel engine is usually used to provide power for the air pump.

[0022] The air pump 1 is equipped with an exhaust valve 2, which can discharge gas to relieve pressure when the air pump 1 stops working.

[0023] For the air pump 1 and the fertilizer tank 4 which are connected by a pipeline, specifically, the air outlet pipe of the air pump 1 is connected to the air inlet pipe 5 of the fertilizer tank 4, and the connection between the air outlet pipe and the air inlet pipe 5 is sealed to ensure that the pipeline does not leak air.

[0024] Correspondingly, a pressure gauge 3 is installed on the air inlet pipe 5. The pressure gauge 3 is located at one end where the air inlet pipe 5 is connected to the air outlet pipe of the air pump 1, and the pressure gauge 3 monitors the air pressure output by the air pump 1.

[0025] The air inlet pipe 5 is made of polyvinyl fluoride (U-PVC) or high-density polyethylene (HDPE) material, and also needs to have the performance of withstanding a pressure of more than 10 kilograms. The air inlet pipe 5 is inserted into the interior of the fertilizer tank 4 and extends to the bottom of the tank body of the fertilizer tank 4 to achieve air supply. Moreover, the air inlet pipe 5 at the bottom of the fertilizer tank 4 is distributed in a disc shape around, and air outlet holes 7 are evenly arranged on the side of the air inlet pipe 5 distributed in a disc shape. When the air is pressurized by the air pump and enters the fertilizer tank along the air inlet pipe 5, it will finally be discharged from the air outlet holes 7 of the bottom disc-shaped air inlet pipe, and the gas plays a role in stirring the water-fertilizer solution while discharging.

[0026] Furthermore, a feed port 6 is provided at the top of the fertilizer tank 4, which is convenient for opening to load soluble fertilizers and add water. Usually, a sealing rubber ring is provided at the feed port 6 to ensure that the fertilizer tank 4 does not leak air when the feed port 6 is in the closed state.

[0027] A water outlet 8 is opened on one side of the bottom of the fertilizer tank 4. The water outlet 8 is connected to a water-fertilizer injection pipe 13, and the water-fertilizer injection pipe 13 is incorporated into the main pipeline 12. Thus, the water-fertilizer solution flows out through the water outlet 8 under the action of air pressure and is injected into the main pipeline 12, and the main pipeline 12 accesses irrigation water and realizes the irrigation and transportation of water-fertilizer.

[0028] Preferably, a filter screen 9 is provided at the water outlet 8. The filter screen 9 plays an intercepting role to prevent fertilizers and other impurities that have not been completely dissolved in the water-fertilizer solution from entering the main pipeline.

[0029] The water-fertilizer injection pipe 13 is also made of polyvinyl fluoride (U-PVC) or high-density polyethylene (HDPE) material, and also needs to have the performance of withstanding a pressure of more than 10 kilograms. A one-way valve 10 is installed on the water-fertilizer injection pipe 13. The one-way valve 10 has an anti-backflow function to ensure that the water-fertilizer solution can only flow from the fertilizer tank 4 to the main pipeline 12.

[0030] A flow meter 11 is also installed on the water-fertilizer injection pipe 13. The flow meter 11 is located downstream of the one-way valve 10, and the flow meter monitors the flow rate of the water-fertilizer solution in real time.

[0031] Therefore, the working process of using the pneumatic fertilizer injection device of the present utility model for fertilizer injection is as follows:

[0032] Under the condition that the air pump 1 stops working and the pressure value of the pressure gauge 3 is 0, fertilizers and water are added into the fertilizer tank 4 from the feed inlet 6. The well pump is turned on so that the irrigation water flows through the main pipeline 12. At this time, there is pressure in the main pipeline 12. However, due to the existence of the check valve 10, the water in the main pipeline 12 cannot flow back into the fertilizer tank 4. The exhaust valve 2 is closed, and the air pump 1 is started to work. Air enters the bottom of the fertilizer tank 4 through the air inlet pipe 5 and is discharged from the air outlet hole 7. While discharging, the stirring and mixing of fertilizers and water are realized. After the fertilizers are completely stirred evenly, the feed inlet 6 is closed, and the pressure in the fertilizer tank 4 begins to increase. Under the action of the pressure, the water-fertilizer solution passes through the water outlet 8 and the filter screen 9 and enters the water-fertilizer injection pipe 13 and is injected into the main pipeline 12. The flowmeter 11 on the water-fertilizer injection pipe 13 monitors the flow rate of the water-fertilizer solution injected into the main pipeline 12 in real time. By adjusting the pressure of the air pump 1, the pressure in the fertilizer tank 4 is adjusted, so as to realize the adjustment of the injection flow rate of the water-fertilizer solution. After all the water-fertilizer solution is injected into the main pipeline 12, the air pump 1 is stopped and the exhaust valve on the air pump 1 is opened to make the value of the pressure gauge 3 drop to 0, and then the feed inlet 6 is opened. Finally, the well pump is stopped to end the fertilizer injection work.

[0033] In summary, for the pneumatic fertilizer injection device disclosed in the present utility model, compared with the prior art, it has the following technical advantages:

[0034] 1) The air pump discharges the water-fertilizer solution in the fertilizer tank and injects it into the main pipeline through the action of air pressure. Since the air pump is not in direct contact with the water-fertilizer solution, the problem of the water-fertilizer solution corroding the water pump in the traditional use of the water pump can be avoided.

[0035] 2) The water-fertilizer solution is incorporated into the main pipeline through the water-fertilizer injection pipe. With the filtering and intercepting effect of the filter screen, the problem of blockage of the water-fertilizer injection pipe can be effectively avoided. Compared with the traditional method that the water-fertilizer solution needs to pass through the water pump, the requirement for the filtration accuracy is reduced, and the problem that the incompletely dissolved fertilizers may cause the blockage of the water pump is avoided.

[0036] 3) Compared with the traditional negative pressure suction method, the air pressure action method provided by the air pump of this new type will not cause pressure loss in the main pipeline, ensuring the water output and irrigation uniformity.

[0037] 4) While injecting gas, the air inlet pipe stirs the fertilizers. The disk-shaped air inlet pipe has a wide coverage range. Combining the gas stirring method has the advantage of no dead angle in stirring, which is beneficial to the full dissolution of fertilizers in water, and greatly reduces the probability of the phenomenon of burning seedlings caused by uneven fertilizer concentration.

[0038] The above-mentioned embodiments are not limitations on the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model also belong to the protection scope of the present utility model.

Claims

1. A pneumatic fertilizer injection device, comprising a fertilizer tank (4), characterized in that: It also includes an air pump (1); The air outlet pipe of the air pump (1) is connected to the air inlet pipe (5) of the fertilizer tank (4); The top of the fertilizer tank (4) is provided with a feed inlet (6), and the air inlet pipe (5) is inserted into the interior of the fertilizer tank (4) and extends to the bottom of the tank body of the fertilizer tank (4); One side of the bottom of the fertilizer tank (4) is provided with a water outlet (8), and a water and fertilizer injection pipe (13) is connected to the water outlet (8), and the water and fertilizer injection pipe (13) is incorporated into the main pipeline (12); The main pipeline (12) accesses irrigation water and is used for the irrigation and transportation of water and fertilizer.

2. The pneumatic fertilizer injection device according to claim 1, wherein: The air inlet pipe (5) located at the bottom of the tank body of the fertilizer tank (4) is distributed in a disk-shaped surrounding manner, and air outlet holes (7) are evenly arranged on the side surface of the air inlet pipe (5) distributed in a disk-shaped surrounding manner.

3. The pneumatic fertilizer injection device according to claim 1 or 2, characterized in that: The air pump (1) is equipped with an exhaust valve (2).

4. The pneumatic fertilizer injection device according to claim 3, characterized in that: A pressure gauge (3) is installed on the air inlet pipe (5), and the pressure gauge (3) is located at one end where the air inlet pipe (5) is connected to the air outlet pipe of the air pump (1).

5. The pneumatic fertilizer injection device according to claim 3, characterized in that: A filter screen (9) is arranged at the water outlet (8) of the fertilizer tank (4).

6. The pneumatic fertilizer injection device according to claim 3, wherein: A check valve (10) is installed on the water and fertilizer injection pipe (13).

7. The pneumatic fertilizer injection device according to claim 6, wherein: A flow meter (11) is also installed on the water and fertilizer injection pipe (13), and the flow meter (11) is located downstream of the check valve (10).

Images