Combined water level control valve without power source

Abstract

The invention relates to a combined water level control valve without a power source. When the combined water level control valve is used, at first, a primary valve is mounted on a water supply pipeline, a secondary valve is mounted in a field, a connecting hose is in butt joint with union nuts which are arranged on the primary valve and the secondary valve, the combined water level control valve without the power source is normally opened, and when a floating ball of the secondary valve drops, the planes of an ejecting rod and a guide pipe form a space naturally, so that the pressure of the upper cavity of a membrane of the secondary valve is released, and at the moment, the secondary valve is opened; then the pressure of the upper cavity of the primary valve is released through the connecting hose, and at the moment, the primary valve is opened; and when the water level of the field is reached, the floating ball floats under the action of water buoyancy, the round plane of the eccentric ejecting rod and the plane of the pressure releasing guide pipe are naturally matched and sealed, so that the pressure of the upper cavities of the sealed membranes cannot be released, under the double actions of pressure balancing holes of the membranes and a reset spring, water supply is stopped by virtue of the membranes of the secondary valve and the primary valve in sequence, and under non power source and unattended conditions, water supply and water supply stop are repeated so as to achieve the automatic supply and automatic supply stopping functions. Since the combined water level control valve is reasonable in structure, and convenient to mount, the combined water level control valve has a great market and popularization value.

Description

technical field [0001] The invention relates to the field of liquid level control, in particular to a powerless combined water level control valve for automatic farmland irrigation. Background technique [0002] Existing farmland irrigation water control generally adopts the method of digging a gap on the farmland ridge to release water, or pre-buying culverts on the field ridge to enter the water. The above two methods require manual blocking in time to stop the water when the field water level reaches the requirements. Therefore, it is time-consuming and labor-intensive. At the same time, it is easy to forget to turn off the water. At this time, the water source will be lost in large quantities. Therefore, it is imperative to develop automatic water control valves for farmland. condition. SUMMARY OF THE INVENTION [0003] The non-power combined water level control valve of the present invention is mainly used for pipeline pressure irrigation. [0004] In order to achie...

AI Technical Summary

Problems solved by technology

[0002] Existing farmland irrigation and water control generally adopts digging a gap on the farmland ridge to release water, or pre-buried culverts on the ridge for water intake. The above two methods require manual blocking in time when the field water level meets the requirements. Water is labor-intensive and time-consuming. At the same time, it is easy to forget to turn off the water. At this time, a large amount of water will be lost. Therefore, it is imperative to develop automatic water control valves for farmland, which meets the water-saving requirements advocated by the country. condition

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