CN2598340Y

CN2598340Y - Ultra-low waterhead compensating drip irrigation belt

Info

Publication number: CN2598340Y
Application number: CNU032202067U
Authority: CN
Inventors: 晨王; 王晨
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-05
Filing date: 2003-03-05
Publication date: 2004-01-14
Anticipated expiration: 2013-03-05

Abstract

An ultra-low (0.2-1.0 m) waterhead compensating drip irrigation belt is produced with special polythene film slice being rolled. After thermal jointing or adhesive connection, the utility model has a main cavity conduit and a subsidiary cavity conduit which are integrated. The septum of the two cavity conduits is provided with water inlets and outlets which are spaced evenly and are communicated with the cavity conduits. The upper inner wall of the subsidiary cavity conduit is a variable sectional surface which has a convex middle part and two gradually thinning sides. When the water pressure is raised, the subsidiary cavity conduit forms a double-cavity small flow passage; when the water pressure is lowered, the flow passage of the subsidiary cavity conduit becomes enlarged, and the double-cavity small flow passage gets changed into a large flow conduit. The conversion of the single-cavity flow passage or the double-cavity flow passage can automatically regulate the resistance of water flow so as to guarantee the uniformity of water dropping. The utility model has the functions of compensating pressure and automatically cleaning mud, sand and impurities. The utility model resolves the difficulty that the acknowledged drip irrigation belt is unfit for waterhead drip irrigation places.

Description

The compensation irrigate band of a kind of extra low head

Affiliated technical field: the utility model relates to the new drip tape that a kind of working head (pressure) can drip when having only 0.2-1.0m, adopts two-chamber runner and big section water-in and water-out mouth structure, has pressure compensation and anti-blocking function.

Background technology: the present domestic irrigate band that does not also have extra low head to drip, its working head of known irrigate band is many between 3～10m, and what have is higher.This irrigate band is rolled by speciality polyethylene diaphragm and forms, the folded system of the vertical fixed length of dual-side when rolling, banded pipeline through the major and minor cavity of heat seal or bonding one-tenth disjunctor, on main cavity, leave equidistant water inlet, leave equidistant delivery port on secondary cavity, current drip through runner, the delivery port of turbulent fluidised form.Because the runner of turbulent fluidised form is having many bends or curves and the tiny runner that certain-length is arranged again of section, and the current that pass through need through fine filtering, resistance to water-flow is very big, because of it (does not drip during 0.2～1.0m) use, so known irrigate band can not be used in the drip irrigation place of extra low head at extra low head.

The purpose of utility model: the purpose of this utility model is to realize like this, the belt body of irrigate band is rolled by speciality polyethylene diaphragm and forms, the vertical fixed length of dual-side is stacked when rolling, banded pipeline through the major and minor cavity of heat seal or bonding one-tenth disjunctor, the aperture of leaving on the main cavity, equidistant garden is the water inlet of irrigate band, the interior upper wall of secondary cavity and make intermediate projections and gradually to the variation section of both sides attenuation, in secondary cavity, cancel turbulent runner on the upper wall axis, and equidistantly be cut into the garden delivery port of stripper plate.Its practical characteristics are: current flow into secondary cavity by main cavity, and when hydraulic pressure uprises, main cavity expands, and secondary cavity diminishes, and major-minor cavity barrier film touches in the above-mentioned secondary cavity the disconnected and intermediate projections end of upper wall variation, and this moment, secondary cavity formed the two-chamber runner that diminishes.When the hydraulic pressure step-down, barrier film moves down, and it is big that secondary cavity becomes, and at this moment secondary cavity is ganged up into a big runner by the two-chamber small flow channels.Can adjust resistance to water-flow automatically like this, make the constant pressure of water dropping openings, water amount is identical, has pressure compensation, has guaranteed the uniformity of dripping.In addition, when main cavity pressure from large to small the time, the impurity that enters in the secondary cavity can instead flow into main cavity, can clear up alluvial voluntarily.The delivery port of stripper plate is the stripper plate closure when not water outlet, and can block plant root whisker and particulate contamination enter in the band, have the function of anti-blocking.

Technical scheme: the characteristics of the utility model irrigate band are the flow passage structures of the tiny and sinuate turbulent fluidised form of cancellation section, change into by two-chamber runner water delivery straight and that section is bigger.

Beneficial effect: the flow passage structure water delivery resistance with turbulent fluidised form is big, so can't be applicable to the drip irrigation place of extra low head.The utility model irrigate band is cancelled the flow passage structure of turbulent fluidised form and is used the direct water delivery of intake-outlet of straight two-chamber runner and increasing instead, and does not need fine filtering, and resistance to water-flow is little, thus can be when extra low head dripping irrigation.The utility model irrigate band is simple in structure, and belt making process is simplified, and saves more expensive mould manufacturing expense again.This irrigate band can be used in the greenhouse, booth or the irrigated area, land for growing field crops, utilizes the low water head water delivery drip irrigation of water tank or channel, need not power and water pump supplies water and complicated filter plant, reduce investment outlay and the energy, and also enlarged the application of irrigate band.

The drawing explanation:

Fig. 1 is the flow passage drip irrigation belt with turbulent fluidised form

Fig. 2 is the outside drawing of irrigate band of the present utility model and work water pressure runner profile A-A, B-B, runner profile (A-A), (B-B) when working water is forced down when high

In Fig. 1, main cavity (1), secondary cavity (2), heat seal or cemented side seam (3), water inlet (4), turbulent fluidised form runner (5), delivery port (6)

In Fig. 2, variation section (3), water inlet (4), stripper plate delivery port (5), heat seal or the bonding longitudinal seam (6) of upper wall projection in main cavity (1), secondary cavity (2), the secondary cavity

Realize the best way of utility model: irrigate band of the present utility model is the runner of the turbulent fluidised form of cancellation Fig. 1 as can be known from Fig. 2, and by straight two-chamber runner water delivery, obviously the water delivery section is greater than the runner of turbulent fluidised form, and the entery and delivery port section is also bigger, thereby resistance to water-flow reduces, (0.2～1.0m) also can normally drip extra low head, is difficult for blocking.The variation section of upper wall projection makes flow section change under different hydraulic pressure in (3) secondary cavity among Fig. 2.Fig. 2 midship section figure is the single chamber of secondary cavity section change great achievement runner when pressure changes as can be known, secondary cavity section diminishes into the two-chamber small flow channels again when pressure diminishes, and adjusts the resistance of current automatically, plays the pressure compensation effect, make that (under 0.2～1.0m), it is also very even to drip at extra low head.Stripper plate in Fig. 2 profile (5) delivery port can be when not water outlet closure, play and stop that plant root whisker and granule foreign enter in the band, have the anti-blocking function.

Sample testing is the result prove, the utility model is when the 0.2-1.0m head, and its pressure and the flow relation that linearly rises confirms that its performance when extra low head drips is normal, and the uniformity reaches about 95%.

Claims

1, the compensation irrigate band of a kind of extra low head, divide major and minor two-chamber runner, at the cavity inside and outside wall intake-outlet is set respectively, it is characterized in that: upper wall is an intermediate projections and gradually to the variation section of both sides attenuation in the runner of secondary chamber, and the delivery port of secondary chamber runner is provided with stripper plate.

2, the compensation irrigate band of a kind of extra low head as claimed in claim 1, it is characterized in that: major and minor two-chamber runner is two runners that an one is separated by barrier film with one heart, runner middle circle shape tube portion is a main chamber runner with one heart, and its top crescent tube portion is a secondary chamber runner.

3, the compensation irrigate band of a kind of extra low head as claimed in claim 1, it is characterized in that: round tube master chamber runner outer wall axis is provided with circular water inlet, secondary chamber runner outer wall axis is provided with the delivery port with circular stripper plate, and intake-outlet is arranged on the same axis, and a delivery port is set in the middle of two water inlets.