SU1606606A1 - Water outlet from irrigation system - Google Patents

Abstract

The invention can be used in hydraulic engineering of irrigation systems, in particular irrigation equipment. The purpose of the invention is to improve performance, reduce material consumption and simplify manufacturing technology. The outlet includes a housing 1 with a lid 2 and a membrane 6 fixed between them, which forms a membrane cavity with the lid 2. The cavity is divided by a partition 7 into two parts, communicating with a tube 8. The shut-off element is made in the form of a valve, the seat of which serves as an inlet 3 with a perforated side surface and a support lug 5. The valve is made in the form of a cup 13. When the pipeline is filled, water enters line 9 through membrane cavity, clamped and compressed air in it. The flow of water from the hydrant is controlled by a valve 11, when opened, the water is discharged into the outlet 12, the pressure in the membrane cavity drops, the cup 13 is pressed and the water passes to the irrigation. 1 il.

Description

The invention relates to the hydraulic engineering construction of irrigation systems, in particular to irrigation equipment, and can be used to supply water from pressure pipelines of an irrigation network to an irrigation hose or sprinkler.

The aim of the invention is to improve operational characteristics, reducing material consumption and simplifying manufacturing technology.

The drawing shows a diagram of the outlet.

The water outlet comprises a housing 1 with a cover 2, an inlet pipe 3 with a support flange 4 with which it is fixed to the stand of the pressure pipe, and a supporting annular projection 5, a membrane 6 is fixed between the housing 1 and the cover 2, forming a membrane drive cavity separated by a partition 7 into two parts, a tube 8, vertically mounted in the center of the partition 7, communicating parts of the cavity and brought to its upper part, connected by a line 9 to the inlet pipe 3 and a discharge pulse line 10 with a control valve 11 located on it phenomena with the outlet pipe 12. The locking body before the release is made in the form of a glass 13, the bottom of which is attached to the rigid center of the membrane 6. The glass rests on an annular protrusion 5, equipped with a rubber seal. The lateral surface of the inlet pipe 3 is perforated by the magnitude of the membrane stroke, the end of the tube 8 is located above lines 9 and 10.

The outlet works as follows.

In the initial position, under the influence of its own weight, the glass 13 abuts against the seal of the annular protrusion 5. When water is supplied to the pressure pipe, the air contained in it is forced out through the riser and the inlet pipe 3 into the housing 1. Since the valve 11 is closed, the air pressure in the membrane cavity increases, as a result, the closure is pressed against the ring 5. As the water pressure in the pressure pipe rises, the air in the upper part of the membrane cavity is compressed, while the closure is constantly pressed to the saddle, you growing water during the filling operation flowline and other hydrants excluded.

For irrigation, the valve 11 of the discharge line 10 opens and the air from the upper part of the membrane cavity is discharged into the nozzle 12, s the membrane cavity is filled with water along line 9, while part of the air under the cover is pinched. In connection with the pressure drop in the membrane cavity, the glass 13 starts rise and water through the perforation of the inlet pipe 3 enters the housing and the pipe 12 is discharged into the irrigation sleeve. The air trapped in the membrane cavity damps the resulting pressure pulsations, as a result of which vibration is eliminated. The water flow rate is regulated by changing the discharge value along line 10. Due to the large inertia of pressure transmission to the membrane through a two-phase medium, the change in the position of the shut-off element occurs gradually and pressure pulsations caused by the simultaneous operation of several outlets are less reflected at the pipe joints and health fittings.

To stop watering, the valve 11 on the line is closed, which leads to equalization of pressure in the pipe 3 and the cavity above the membrane 6. On the one hand, the force acts on the membrane due to its effective surface, and on the other, the lifting force on the side surface of the glass. Since the area of the lateral surface is obviously smaller, the membrane bends down and the glass abuts against the seal of the ring 5 with its end.

Claims (1)

Claim A water outlet from a pressure head irrigation network <: contains a housing with a cover, an inlet and an outlet nozzle, and a shut-off element with a membrane actuator, the cavity of which is connected to an inlet and an outlet nozzle, which is necessary in order to improve the performance To reduce material consumption and simplify manufacturing technology, the inlet pipe is perforated by the size of the membrane stroke and provided with a supporting annular protrusion, and the valve is made in the form of an inverted cup covering the pipe, while in the cavity of the membrane of the drive, a horizontal partition is installed, dividing it into two parts, communicated with each other by a vertical tube brought to the upper part of the cavity. ·