Pulse type micro-sprinkling irrigation spray head

Abstract

The invention belongs to the technical field of field irrigation and particularly relates to a pulse type micro-sprinkling irrigation spray head which comprises a casing and a piston. The piston divides an inner cavity of the casing into a water inlet cavity and a compression cavity, the water inlet cavity is connected with a micro-sprinkling irrigation water-conveying vertical pipe through a water inlet flow channel, and the piston is provided with a compression cavity moisturizing check valve and an elastic water-stopping ring. A compression spring, a tower-shaped spring, a spherical elastic valve body and a spraying hole are arranged in the compression cavity, the compression spring is sleeved outside the tower-shaped spring, one end of the compression spring abuts against the piston, the other end of the compression spring abuts against an inner wall of the casing close to the spraying hole, a large end of the tower-shaped spring is fixed on the piston, and a small end of the tower-shaped spring is fixed on the spherical elastic valve body. A curved surface of a water inlet of the spraying hole is matched with a curved surface of the spherical elastic valve body, and a refraction cone is arranged over the spraying hole. Compared with an imported pulse type micro-sprinkling irrigation system, the pulse type micro-sprinkling irrigation spray head is similarly excellent in anti-blocking performance and sprinkling evenness, simple in structure, low in input cost, suitable for China's actual conditions and easy to popularize and apply.

Description

Technical field: [0001] The invention belongs to the technical field of farmland irrigation, in particular to a pulse-type micro-sprinkler irrigation nozzle. Background technique: [0002] Micro-sprinkler irrigation is a form of irrigation that uses micro-sprinklers to spray low-pressure water or chemicals on branches and leaves or on the ground with micro-flow and low pressure through the pipeline system. The difference between micro-sprinkler irrigation and drip irrigation is that the emitter is changed from a dripper to a micro-sprinkler. The dripper consumes the remaining pressure of the capillary by its own structure, while the micro-spray consumes energy by spraying. The wet area is larger than that of drip irrigation, which is beneficial to eliminate the water-saturated area, so that water can be absorbed by the soil at any time, and the aeration conditions of the root zone are improved. Compared with ordinary sprinkler irrigation, it has low working pressure and sma...

AI Technical Summary

Problems solved by technology

[0003] Existing micro-sprinkler irrigation nozzles have the following defects: 1. easy to block; 2. sprinkling intensity (water volume) is concentrated in a ring, and the precipitation intensity (water volume) near the maximum sprinkler range is much higher than that near the nozzle or other places, and the sprinkling uniformity is poor, and The more stable the outflow, the more obvious the problem of ring concentration of sprinkling intensity (water volume)

The main defects are: 1. The structure is complex, and the water irrigation elastic capillary needs to be made of special elastic materials, and the input cost is too high, which is not suitable for the national conditions; 2. The water spraying of the latter sprinkler is carried out sequentially after the water spraying of the previous sprinkler is released. If any sprinkler fails, the system will stop running; 3. The pulse micro-sprinkler irrigation system starts the sprinkler water spraying process through the pulser assembly to release water and lose pressure. When spraying water, part of the water that has been pressurized in the pipe from the first sprinkler to the pulser assembly of each irrigation elastic capillary is directly released, resulting in both energy loss and water loss

[0005] In 1993, Tianjin Intertech Micro-irrigation Company exclusively introduced this patented technology from the United States and produced this equipment in China. However, due to "acclimatization", it was not suitable for the national conditions, and the production was stopped.

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