Automatic precise controller for water fertilizer

Abstract

The invention provides an automatic precise controller for water fertilizer, comprising a fertilizer liquid tank and an acid liquid tank which are communicated with a main water pipe; a fertilizer filling pump and a fertilizer liquid flowmeter are sequentially installed on a fertilizer liquid pipe; an acid liquid pump is installed on an acid liquid pipe; a fertilizer mixer, a fertilizer mixer outlet electromagnetic valve, a fertilizer mixer outlet flowmeter and a pressure difference valve are sequentially arranged on the main water pipe on the rear end of the joint of the fertilizer liquid pipe, acid liquid pipe and the main water pipe; the tail end of the main water pipe, namely the outlet of the pressure difference valve is connected with a partition filling pipe; a PH meter and an EC meter are connected in parallel on both ends of the pressure difference valve; and the fertilizer filling pump, the fertilizer liquid flowmeter, the acid liquid pump, the fertilizer mixer outlet electromagnetic valve, the fertilizer mixer outlet flowmeter, the PH meter, the EC meter, and a temperature sensor and a humidity sensor arranged in the soil are respectively connected with a control cabinet. During the fertilizing process, non-manual operation can be completely realized by inputting corresponding parameters; a control system can automatically detect the flow of the fertilizer path and automatically switch the electromagnetic valve so as to irrigate with different fertilizer ratios.

Description

technical field [0001] The invention relates to an automatic water and fertilizer precision control machine, in particular to an automatic water and fertilizer precision control machine suitable for the growth law of berry economic crops such as strawberries and blueberries in Northeast my country, with a high degree of intelligence and high control precision. Background technique [0002] Irrigation and fertigation is to inject the dissolved fertilizer solution into the irrigation system through the fertilization device. It is an advanced fertilization method that transports the fertilizer to the field together with the irrigation water. It is the product of the combination of precise fertilization and precise irrigation. Synchronization. The advantage of fertigation is uniform and accurate fertilization. The irrigation and fertigation system can control parameters such as irrigation water volume, fertilization amount, and fertilization time stably and with high precision,...

AI Technical Summary

Problems solved by technology

The pressure difference fertilization device is to connect the liquid storage tank in parallel on the irrigation main pipe, and cause a pressure difference at both ends, and use the water entering the liquid storage tank to inject the original hydraulic pressure of the liquid storage tank into the irrigation water, but due to the liquid in the liquid storage tank Constantly diluted by water, the concentration of the output liquid keeps decreasing, the adjustment of the mixing ratio of water and fertilizer is difficult, the frequency of adding fertilizer is frequent, the labor intensity is high, and there is a certain loss of water head, which makes the mixing ratio of it and water difficult to control

The suction type uses Venturi tubes, valves or Pitot tubes to generate local pressure differences to suck the original solution into the irrigation water. However, the pressure adjustment range of this fertilization device is limited, and the stability of the main flow rate is high, and the pressure loss of the system is large. , although the pressure loss of the system can be reduced by using a parallel venturi tube, its pressure regulation range is still limited, and the stability of the main pipe flow has a great influence on its fertilizer suction flow

Images