RU2283582C1 - Drop-type water outlet - Google Patents

Abstract

FIELD: equipment for irrigation of farm crops by drop irrigation method with the help of flexible irrigation pipelines.

SUBSTANCE: water outlet has insert made from elastic material and covered with protective enclosure. Insert is fixed in pipeline wall by means of belt in the mid portion and by means of bead in the inner part of pipeline. Insert has conical receptacle and spring-loaded valve which are positioned on inner part of pipeline. Valve is mounted on bracket for rotation in the course of flow. Protruding part of insert above pipeline surface is made semispherical and is closed with protective grid.

EFFECT: enhanced reliability in operation of pipeline by providing feeding of water into root layer of soil in predetermined amounts.

3 cl, 1 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 smoothly conjugated to it by a rear curvilinear horizontal part directed outwardly by convexity when the outlet of the housing is placed therein 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 ode and connected to the latter its housing by means of screws, countersunk performed, the plate is provided with a projection with an oblique cut, which is located behind the inlet (SU, Inventor's Certificate №1501981, M.kl. A 01 0 25/02, 08.23.1989).

The disadvantages of the described outlet are limited functionality, the difficulty of installation and poor quality of irrigation.

A water outlet with a flexible pipe is also 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 pipe from the outside, the elastic casing is made in the shape of a tube (SU, copyright certificate No. 378592, M.cl. E 02 B 13/02, A 01 G 25/02, 04/18/1973).

The disadvantages of the presented outlet are limited functionality and low reliability.

The closest technical solution to the claimed object is a water outlet made in the form of a piston installed in the pipeline opening, provided with a porous element overlapping the pipeline opening and pressed to the piston, for example, by means of a plate rigidly connected to it (SU, copyright certificate No. 471094, M. class A 01 G 2, 05 V 1/20, 05/25/1975).

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

The invention consists in the following.

The problem to which the invention is directed, increasing operational reliability and controlled water supply.

The technical result is a comprehensive mechanization of laying and laying out the pipeline during operation, simplifying the design.

The specified technical result is achieved by the fact that in a known drip outlet including an insert made of an elastic material installed in a hole in a pipeline and having an opening, according to the invention, the insert is secured in the middle part with a belt and with an inner collar, behind which there is a bracket with a spring-loaded valve mounted on it with the possibility of its rotation in the direction of movement of the water flow, while the insert is covered with a protective shell, and the hole of the elastic insert is made through; the protruding part of the insert above the surface of the pipeline has a hemispherical shape; On the protruding part of the insert is a protective mesh.

The invention is illustrated in the drawing, which schematically shows a section along the axis of the pipeline with a drip outlet installed.

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

A drip outlet is installed in the main pipeline 1 and includes an elastic insert 2 with a through hole 3. The elastic insert 2 from the side of the protruding part above the surface of the pipeline 1 has the shape of a hemisphere and is covered with a protective sheath 4 on top, which prevents elastic destruction of the elastic insert 2 having a through hole 3 protective net. The elastic insert 2 is fixed in the middle part of the girdle 5, and on the inside of the wall of the pipe 1 - collar 6. Behind the collar 6 there is a bracket 7 for installing a spring-loaded valve 8 and a conical socket 9. Valve 8 is fixed by a spring 10, which freely moves under the bracket 11 on valve 8 and under the bracket 12 on the bracket 7.

The valve 8 is mounted on the bracket 7 in such a way that it has a constant inclination towards the flow with a speed V, and the angle of inclination of the valve 8, which is fixed by the spring 10, depends on the speed V of the flow and pressure in the pipeline 1. The drip outlet is mounted in the installation hole as follows. Due to the through hole in the pipe 1 and the hole 3 in the elastic insert 2, it is compressed and inserted into the mounting hole against the stop in the supporting surface, which is the protruding hemispherical part. After that, the elastic insert 2 under the action of elastic forces is expanded and tightly fixed in the technological hole of the pipeline 1.

Drip outlet works as follows.

The flow of water, moving along the inner cavity of the pipeline 1 with a speed V, acts on the valve 8 and sets it obliquely and in a certain position. This position is determined by the equality of the forces exerted by the flow on the valve 8 and the counteraction of the force of the spring 10. With the steady position of the valve 8, water through the gap between the valve 8 and the conical socket 9 enters the through hole 3 of the insert 2. The flow rate of water through the outlet can be determined by the equation

where μ is the flow coefficient;

ω is the living cross-sectional area of the stream;

g is the acceleration of gravity;

H is the pressure above the center of gravity of the calculated cross section of the jet.

The flow coefficient μ depends on the shape and thickness of the input edge of the hole 3, the ratio of the areas of the hole 3 and the cross-section of the pipeline 1, as well as the Reynolds number. The design head above the center of gravity of the design section of the jet depends on the magnitude of the opening of valve 8, the speed of flow in the pipe 1 and the actual pressure. Since the effective pressure varies in magnitude from the beginning to the end of the pipeline 1, the value of the water flow also changes.

Moreover, the impact of the high-speed flow pressure changes the position of valve 8 and the flow rate Q of the drip outlet. Thus, a given supply of irrigation water to the root layer of the soil is ensured. It does not depend on the location of the outlet along the length of the pipeline 1.

Claims (3)

1. A drip outlet including an insert made of an elastic material installed in a hole in a pipeline, having an opening, characterized in that the insert is secured with a belt in the middle part and with a shoulder, behind which there is a bracket with a spring-loaded valve mounted on it with the possibility of rotation side of the movement of the water flow, while the insert is covered with a protective shell, and the hole of the elastic insert is made through. 2. The drip outlet according to claim 1, characterized in that the protruding part of the insert above the surface of the pipeline has a hemispherical shape. 3. Drip outlet according to claim 1, characterized in that a protective mesh is placed on the protruding part of the insert.