RU2335890C1 - Drainage outlet of drip line - Google Patents

Abstract

FIELD: agriculture; transportation.

SUBSTANCE: drainage outlet includes closure which is placed on pipeline wall in butt weld. Chamber in the form of triangular prism with top rounding off is executed in the butt weld. Elastic valve with rounded off face and flat lateral edges and water throughput aperture is placed in the chamber. Diameter of drain opening at not intense condition of the valve corresponds to the set throughput of drainage outlet at minimum pressure in the pipeline. Thickness of the valve is twice more than diameter of discharge opening. Backlash between lateral edges of the valve and chamber walls makes 0.01÷0.05 mm. An angle at prism top is within limits of 60÷70°.

EFFECT: possibility of provision of set water discharge on all length of irrigation pipeline.

3 dwg

Description

The invention relates to techniques for irrigation of crops using the drip method using flexible irrigation pipelines.

A water outlet of an irrigation pipeline is known, including a housing with a drain hole and a fastener connecting the housing to the pipeline, the housing being formed by two sidewalls connected by a vault consisting of a front horizontal part and a rear curved horizontal part smoothly conjugated with it directed outwardly, while the outlet hole of the housing is placed in it opposite the rear curvilinear part of the arch, and the fasteners are made in the form of a plate placed on the inside of the pipe water and connected to the latter by means of screws made flush, while the plate is equipped with a protrusion with an oblique cut located behind the inlet (SU 1501981 A1, 23.08.89).

Disadvantages of the water outlet are limited functionality, difficulty of installation, poor quality of irrigation.

A water outlet with a flexible conduit is known, including an elastic casing installed in the wall and attached to the edges of the water outlet, one of which is bent into the pipeline from the outside, the elastic casing is made like a tube (SU 378592 A1, 04/18/1973).

The disadvantages of the outlet are limited functionality, low reliability.

There is a known water outlet made in the form of a piston installed in an opening of a pipeline, provided with a porous element overlapping the pipeline opening and pressed against the piston, for example, by means of a plate rigidly connected to it (SU 471094 A1, 05.25.1975).

The disadvantages of this outlet are limited functionality, low operational reliability, lack of ability to control the water supply.

Known valve for sprinkling, etc. devices with a body and an elastic locking element overlapping the holes in the saddle, on which a central protrusion is formed, and an elastic elastic locking body in the form of a flat plate forming gaps with the walls of the body is attached to it (SU 360498 A1, 11.28.1972).

The disadvantages of the valve include limited functionality, the lack of the possibility of a regulated water supply, depending on the actual pressure.

A well-known water outlet of the irrigation pipeline, comprising a corrugated pipe and a piston for reinforcing the hole, is provided with an elastic perforated membrane located under the pipe (SU 261015 A1, 01/06/1970).

The disadvantages of the outlet include the difficulty of maintaining a given water flow rate, since significant pressure is required to overcome the resistance of the membrane fixed in the piston around its entire perimeter. In addition, the movement of the corrugated pipe requires manual adjustment, which greatly complicates the operating conditions and reduces the reliability of the outlet.

Known exhaust valve to a flexible supply pipe, including a locking element attached to the inner walls of the pipeline and opening inside the pipeline, while the locking element is made of elastic and attached to the walls of the pipeline by perforated along the edges of the diaphragm (SU 394493 A1, 08/22/1973).

The disadvantages of the water outlet valve are the complexity of the design when fastening the perforated diaphragm to the pipe walls, the low probability of the possibility of an adjustable water supply, since the diaphragm is fixed to the pipe walls around the entire perimeter and the locking element can only be moved when the diaphragm walls break. In addition, flow control with a flat shut-off element is difficult.

This technical solution was taken as the closest analogue.

The invention consists in the following.

The technical result achieved by the implementation of the claimed invention is to provide the ability to supply a given flow rate along the entire length of the irrigation pipeline and to simplify the design.

The specified technical result is achieved by the fact that in the outlet of the flexible irrigation pipe, including a locking element attached to the pipe wall and placed in the butt joint, according to the invention, in the chamber of the butt joint, made in the form of a triangular prism with a rounding of the apex, an elastic-elastic valve with rounded end and flat lateral edges and a culvert, and the diameter of the culvert when the valve is not stressed corresponds to a given throughput odovypuska at the minimum pressure in the conduit, the thickness of the valve is twice the diameter of pipe holes, the gap between the side edges of the valve and the chamber walls is 0.01 ÷ 0.05 mm and an apex angle prism is in the range 60 ÷ 70 °.

The invention is illustrated by drawings, where figure 1 shows a longitudinal section of an irrigation pipeline with a water outlet with a minimum pressure in the pipeline; figure 2 is the same at maximum pressure in the pipeline; figure 3 is a section aa in figure 1.

Information confirming the possibility of implementing the claimed invention are as follows.

The water outlet includes a wall 1 of the irrigation pipeline, in the connecting seam 2 of which a chamber 3 is made in the form of a triangular prism with a rounding of the top. An elastic-elastic valve 4 is placed in the chamber 3, the end edges “a” of which are rounded in diameter equal to the thickness of the valve, and the lateral edges “b” are flat. The top of the prism has a rounding 5 and a water outlet 6. There is a water outlet 7 in the wall of the pipe 1 and a water outlet 8 in the valve 4.

The outlet works as follows.

With a minimum pressure in the pipeline 1 (Fig. 1), the elastic-elastic valve 4 is freely located in the chamber 3, resting on the walls of the chamber with rounded end edges “a”. In this case, the predetermined flow rate Q through the water outlet 7, the water outlet 8 and the water outlet 6 enters the root layer of the soil. The diameter of the culvert hole 8 is designed to allow a given flow rate with a minimum pressure in the pipe 1. With a high pressure in the pipe 1, the elastic valve 4 is deformed (figure 2), while the size of the inlet of the culvert is reduced. The flow rate through the outlet is determined from the equation

,

,

where μ is the flow coefficient (μ≈0.62);

ω is the living cross-sectional area of the water outlet,

g is the acceleration of gravity;

N is the effective pressure.

Thus, with an increase in pressure and a decrease in the cross-sectional area of the culvert, the flow rate remains constant.

Claims (1)

A water outlet of a flexible irrigation pipe, including a locking element attached to the pipe wall and placed in a butt weld, characterized in that in the butt weld chamber, made in the form of a triangular prism with rounding of the apex, an elastic-elastic valve with rounded end and flat side edges and a culvert hole is placed and the diameter of the culvert hole when the valve is not stressed corresponds to the specified flow rate of the culvert with a minimum pressure in the pipeline, the valve is twice as large as the diameter of the culvert, the gap between the lateral edges of the valve and the chamber walls is 0.01–0.05 mm, and the angle at the apex of the prism is within 60–70 °.

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