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Automatic water supply device controlled by soil water potential

An automatic water supply device and soil water potential technology, applied in the direction of watering device, valve device, valve operation/release device, etc., can solve the problems of high cost, low sensitivity, complex structure, etc., to reduce operating costs, low cost, The effect of broad application prospects

Inactive Publication Date: 2011-01-19
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1940s, Dr. L.A.Richards of Cornell University in the United States replaced the dripper in the drip irrigation system with a tensiometer, realizing passive control irrigation without energy, but this equipment has complex structure, high cost, The disadvantage of low sensitivity

Method used

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  • Automatic water supply device controlled by soil water potential
  • Automatic water supply device controlled by soil water potential
  • Automatic water supply device controlled by soil water potential

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: The soil water potential control automatic water supply device includes a valve and an inductor connected to the valve. The inductor is composed of a clay water core 13 and a base 12 fixedly connected to the clay water core. A cavity is arranged inside the sensor. The base 12 is provided with a water injection port 1 and an induction hole 15 communicating with the cavity, and the induction hole 15 is connected with the valve through the connecting pipe 2 . The valve includes a valve body 16 and a spring 8 and a piston 3 arranged in the inner cavity of the valve body. The front end of the valve body 16 is provided with a water inlet 5 and a water outlet 6. When the valve is closed, the piston 3 is in contact with the water inlet 5. A gland 10 is arranged at the rear end of the valve body 16 , and a pressing plate 9 slidingly fitted with the inner cavity of the valve body is arranged on the inner end surface of the gland 10 , and the gland 10 and the valve bo...

Embodiment 2

[0010] Embodiment 2: The pressure chamber 14 is arranged between the piston 3 and the rear end surface of the valve body 16; a gland 10 is arranged at the front end of the valve body 16, and the gland 10 and the valve body 16 are connected by threads, and the gland 10 and the valve body A sealing ring 11 is arranged between the bodies. The front end of the piston 3 is provided with an annular boss matching the inner cavity of the valve body 16, and the outer circular surface of the boss is in contact with the water inlet 5 when the valve is closed. Both ends of the spring 8 are respectively fixed on the gland 10 and the end faces of the piston 3 . Other structures of embodiment 2 are the same as embodiment 1.

[0011] In addition, a pressure plate may also be provided on the gland 10 of the second embodiment, so that the two ends of the spring 8 are respectively fixed on the pressure plate and the end surface of the piston.

[0012] According to the pressure range of the soi...

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Abstract

The invention relates to an automatic water supply device for controlling the soil water potential, which comprises a valve and a sensing device communicated with the valve, wherein the sensing device comprises a pottery clay water core, and a cavity for water infusion is arranged inside the sensing device. A spring, a piston and a pressure chamber are arranged in the inner cavity of the valve body; a water inlet opening and a water outlet opening are arranged at the front end of the valve body, wherein the piston is in contact with the water inlet opening, and the sensing hole on the sensingdevice is communicated with the pressure chamber on the valve through a connecting pipe. In the device, the soil water potential is sensed through the pottery clay water core inserted into the soil, and the movement of the piston is controlled through the negative pressure generated through the soil water potential change to enable the valve to be opened or closed, so that the purpose of automatic water supply can be reached. The device has the advantages of simple structure, low cost, saved energy resource, reduced water resource consumption, greatly reduced operation cost, and wide application prospect in agriculture, stock raising industry and forest industry. Furthermore, the device can perform irrigation in due time according to the water supply demands of the plant crops.

Description

technical field [0001] The invention relates to a water supply device, mainly a device for automatically controlling water supply by sensing soil water potential. Background technique [0002] The existing automatic irrigation system generally adopts the control system of mechanical and electronic hybrid coordination. In the 1940s, Dr. L.A.Richards of Cornell University in the United States replaced the dripper in the drip irrigation system with a tensiometer, realizing passive control irrigation without energy, but this equipment has complex structure, high cost, The disadvantage of low sensitivity. Contents of the invention [0003] The object of the present invention is to provide a soil water supply device that can automatically control timely and appropriate water supply, has simple structure, reliable performance, low operating cost and does not require energy. [0004] For reaching above-mentioned object, the technical scheme that the present invention adopts is: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G25/16A01G25/00F16K1/00F16K3/24F16K31/122
Inventor 汪强何予鹏谭金芳王慧荣
Owner HENAN AGRICULTURAL UNIVERSITY