Degradable anti-clogging underground drip irrigation pipe and manufacturing method thereof

Abstract

The invention relates to a degradable anti-clogging underground drip irrigation pipe and a manufacturing method thereof. The degradable anti-clogging underground drip irrigation pipe is characterized by comprising a drip irrigation pipe, and a plurality of irrigation emitters are arranged on the inner wall of the drip irrigation pipe at intervals; drip irrigation ports are arranged on the drip irrigation pipe in the positions corresponding to water outlets of the irrigation emitters; each irrigation emitter comprises an upper irrigation emitter piece and a lower irrigation emitter piece buckled together; two grid water intake regions are arranged on the bottom face of the upper irrigation emitter piece at intervals, one set of grid water intake ports are arranged in each grid water intake region, and one circle of roundabout and zigzag flow passage is arranged on the periphery of each grid water intake region; one sides of the two circles of roundabout and zigzag flow passages are communicated via a first-stage flow passage, and the first-stage flow passage also communicates the two grid water intake regions; the other sides of the two circles of roundabout and zigzag flow passages are communicated via a converging flow passage, and a pressure compensating region is arranged in the converging flow passage; a water outlet is arranged on the lower irrigation emitter piece in the position corresponding to the pressure compensating region; and a pressure compensating piece is arranged between the pressure compensating region and the water outlet, and the pressure compensating piece is fixed on the inner edge of the pressure compensating piece via two points.

Description

technical field [0001] The invention relates to a drip irrigation pipe and a manufacturing method thereof, in particular to a manufacturing method of a degradable anti-clogging underground drip irrigation pipe and an emitter in the drip irrigation pipe. Background technique [0002] Subsurface Drip Irrigation (SDI) refers to the slow outflow of water through the emitter on the buried capillary, infiltrates into the nearby soil, and then diffuses the water to the entire root layer by means of capillary action or gravity for absorption and utilization by crops. A method of local irrigation. Its advantage is that the soil structure is less disturbed during the irrigation process, which is conducive to maintaining the loose and transparent environmental conditions of the crop root layer. It greatly reduces the surface evaporation of water and the leaching and volatilization loss of fertilizer, improves the utilization efficiency of water and fertilizer, and has obvious benefits...

AI Technical Summary

Problems solved by technology

[0003] The emitter is a key component of the underground drip irrigation system, but because the emitter is buried in the ground, there will be some problems: (1) Negative pressure blockage: refers to the negative pressure generated in the pipe network during the process of closing the underground drip irrigation system The soil particles around the outer wall of the capillary may be sucked into the flow channel through the outlet of the dripper, causing the dripper to be blocked; generally speaking, in the early stage of subsurface drip irrigation, due to the low water content of the soil, there is more air in the surrounding soil, so the outlet The external positive pressure is small, and the outflow of the water outlet is large; as the irrigation time prolongs, the water content of the soil around the water outlet increases. It is too late to diffuse into the soil, forming a saturated zone around the water outlet, which increases the positive pressure outside the water outlet. Under this positive pressure, the output flow of the emitter may be reduced; A saturated zone has been formed within the range, and the air has been basically discharged. At this time, if the water source is suddenly turned off, the air cannot enter the drip irrigation pipe immediately, so that a negative pressure is formed inside the drip irrigation pipe in an instant, and the external pressure of the dripper outlet is greater than the internal pressure. Therefore, under the pressure difference, the sediment around the dripper outlet can easily enter the dripper, which will cause the drip irrigation pipe to block

(3) The problem of degradable drip irrigation pipe (belt) products: While the underground drip irrigation technology has brought huge economic benefits to agricultural production and income, it has also seriously polluted the land; The more plastic fragments form a barrier layer in the soil, reduce the air permeability of the soil, degrade the soil, and cause serious white pollution

[0004] Many scholars at home and abroad have carried out a large amount of development researches on special products for underground drip irrigation emitters, such as: the underground drip irrigation emitter invented by Cheng Xianjun et al. CN 101133712A) invented the self-adaptive underground drip irrigation emitter, which can drip water to the soil according to the actual situation of the soil water content, and automatically stop dripping water when the water content of the soil reaches the field water holding capacity, which enhances the water saving effect, but cannot prevent the negative Pressure generation and problems due to clogging

But in general, the current research only involves one aspect of common clogging of drip irrigation emitters, negative pressure of underground drip irrigation emitters, and root invasion and clogging, and the consideration of the impact of underground drip irrigation systems on soil environmental pollution is still extremely insufficient.

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