CN2465460Y

CN2465460Y - Underground drip irrigation device

Info

Publication number: CN2465460Y
Application number: CN 00261874
Authority: CN
Inventors: 徐富安; 赵炳梓; 徐梦熊
Original assignee: Institute of Soil Science of CAS
Current assignee: Institute of Soil Science of CAS
Priority date: 2000-12-12
Filing date: 2000-12-12
Publication date: 2001-12-19
Anticipated expiration: 2010-12-12

Abstract

The utility model relates to a novel drip irrigation pipe. The vicinity of a water dripping hole is coated with a hydrophobic material layer. After water dripping is finished, because of the action of surface tension, water films on pipe walls of the circumference of the water dripping hole immediately disappear, and a root system can not be extended into the dripping hole through the water films.

Description

Underground drip irrigation device

The utility model relates to the field irrigation device, particularly a kind of buried Dripping irrigation device.

Dripping irrigation is a kind of preferably irrigation technique of water-saving result of promoting in recent years, and under the dripping irrigation condition, ground moistening district scope is less, has reduced the moisture content loss of native face evaporation.In order further to reduce native face evaporation water consumption, and avoid face of land laid pipes to cause the trouble of farming operations such as farming, underground in farmings such as the artificially sown pastures of some arid areas, orchards by droping irrigating pipe being imbedded, enforcement subsurface stratum drip irrigation.Though the subsurface stratum drip irrigation has water saving, is convenient to the farming operation and slows down the aging effect of plastic tube, but the shortcoming that has the easy blocking of water dropper, even quality of irrigation water is good, through multistage filtering, substantially after having got rid of dirt in the water, inorganic particle, be embedded in underground droping irrigating pipe and still have blocked gradually possibility.Check and find, drip the hole blocking and be since root system in stretching process of growth, root system water detection source is stretched into and is dripped due to the hole, especially concerning perennial grass or horticultural crop, along with the root system that penetrates water dropper is long thick long close, have more than is needed several years pipe-line systems will be forced to scrap, and cause the returns of investment of water-saving irrigation to descend, this is in China North China, when vast arid and semi-arid lands, northwest implements drip irrigation economize and irrigates, a problem that can often run into.

Alleviate buried drip irrigation or pipe for osmotic irrigation and can be used chemical method, also the available physical method by the measure that root system stops up.Chemical method mainly adopts phosphoric acid to increase the acidity of irrigation water, in irrigation water, add micro-weed killer herbicide or add small amounts agent (as perchloric acid), the effect that root system stretches that suppresses is all arranged, but they prevent that the effect of weeper obstruction is also not obvious, and plant growth and output are had harmful effect.One of physical method can change a hole shape, makes notch-cut type (slotted on tube wall) into as dripping (oozing) water hole, but need increase irrigation hydraulic pressure, and the domestic hydraulic pressure that uses is 1kg/cm ², notch-cut type needs 3kg/cm ², uneconomical economically.

The purpose of this utility model provides a kind of hole that prevents and is stopped up effective by root system, and the drip irrigation pipe that Financial cost is not high, mainly has tangible hydrotropism's principle according to root system, why root system penetrates drips the hole, because it has found weeper (water source) along the droping irrigating pipe stretching, extension of being with moisture film.In case stop if weeper drips, pipeline outer wall does not promptly have moisture film, and root system just is difficult for finding weeper.The utility model will be coated with hydrophobic material layer according to above-mentioned principle near the weeper, after finishing when dripping, because capillary effect, drip around the hole that moisture film disappears immediately on the tube wall, and root system just can't stretch to a hole by moisture film.

Drip irrigation pipe structure of the present utility model is made of buried droping irrigating pipe etc., duct wall is provided with weeper or porose water dropper is installed, feed press water in the droping irrigating pipe, it is characterized in that at the weeper of droping irrigating pipe or install near the water dropper position the pipeline outer wall face hydrophobic layer is set.At the droping irrigating pipe outer wall hydrophobic layer being set can near the Tefelon material layer of the pipeline perforate on the duct wall.Hydrophobic layer is set on the droping irrigating pipe outside wall surface also can near perforate on the duct wall, be coated with pitch glue or paraffin wax.

Drawings and Examples:

Fig. 1 is the hole shape structure of dripping of buried droping irrigating pipe;

Fig. 2 is the water dropper shape structure of buried droping irrigating pipe.

Referring to Fig. 1,2, be one section in buried droping irrigating pipe.Opening weeper 2 on the droping irrigating pipe wall 1 or porose water dropper 3 being installed on the weeper position, be the buried drip irrigation structure of generally using at present (weeper and water dropper all have the Ministry of Agriculture to issue standard size).The utility model application is near near hydrophobic materials 4 (than low with the Tefelon cost) such as tube wall coating pitch glue, the paraffin wax weeper of offering on the duct wall or by the dress water dropper, generally is coated with the half cycle surface of pipeline, and coating layer thickness is good about 5 μ m.If also be coated with hydrophobic layer on water dropper, then blocking-proof result may be better, but see according to actual effect, and is good at pipe outer wall coating result.

Through the droping irrigating pipe of above-mentioned processing, after finishing when dripping, because capillary effect, drip around the hole that moisture film disappears immediately on the tube wall, root system is difficult for penetrating in the weeper along moisture film.Practical proof, the obstruction speed of dripping the hole obviously descends, and is a kind of practical technique that geographical water dropper stops up speed that reduces.

Claims

1. Underground drip irrigation device is made of buried droping irrigating pipe etc., and duct wall is provided with weeper or porose water dropper is installed, and it is characterized in that at the weeper of droping irrigating pipe or install near the water dropper position the pipeline outer wall face hydrophobic layer is set.

2. Underground drip irrigation device according to claim 1 is characterized in that hydrophobic layer is the Tefelon material layer.

3. Underground drip irrigation device according to claim 1 is characterized in that hydrophobic layer is pitch glue or paraffin wax.