SU1208157A1 - Water outlet hydrant - Google Patents

Description

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The invention relates to agriculture, such as irrigation technology, and is used to supply water from pressure pipelines of a closed irrigation network to a flexible irrigation hose.

The purpose of the invention is to increase reliability, improve performance, simplify manufacturing technology.

The drawing shows a diagram of the hydrant-vodovtusk.

The construction consists of a stack of 1 ,. feo to which water is supplied from the lifting / lifting pressure pipe, body 2, divided by membrane 3 into two parts, discharge pipe 4, to which the irrigation sleeve is attached, of a spherical grid 5, mounted in the bore of the beveled end of the discharge pipe, throttling pipe 6, communicating both cavities hydrant, and waste line with valve 7 control.

Hydrant-outlet works as follows.

In the initial position, both cavities of the housing 2, separated by a membrane, are filled with water, under pressure flowing through the flow 1, the central part of the membrane 3 is pressurized by water from the side of the cavity above the membrane to the spherical lattice 5 located at the end of the nozzle. Kolya is a part of the membrane cloth, bounded on the one hand by its embedding in the body, and on the other in the contour of the end of the nozzle. 4, is unloaded from one-sided water pressure, since both cavities of the housing are connected by tube 6.

If it is necessary to irrigate, the irrigation sleeve is attached to the outer end of the pipe 4, after which the valve 7 of the discharge line opens. Since the cross section of the tube 6 is obviously smaller than the section of the discharge line, the flow of water into the cavity above the membrane will be less than the discharge, with the result that the pressure under the membrane, equal to the pressure p of the discharge pipe, will be larger than above it. Due to the resulting pressure differential, the membrane will move away from the grill and water from the internal cavity of the housing will begin to flow into the nozzles 4.

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the flow rate is produced by the valve 7 by creating a balance between the inflow of water into the supermembrane cavity and the discharge from it.

5 Since the magnitude of the largest stroke of the membrane falls along its center, then with increasing pressure in the supermembrane cavity, the holes of the brush 5 located near the top of the sphere are overlapped. With a further decrease in the discharge flow, the pressure under the membrane increases, and the membrane panel covers more and more

15 number of holes, gradually spreading over a spherical surface. This achieves the flow rate to the irrigation hose in a wide range of its values without vibration of the core, caused by pressure pulsation. To stop the irrigation, the valve 7 is completely closed and the pressure on both sides of the membrane is equalized, while its central

Part 25 is pressed against the grate 5, the compartment supplying water to the nozzle 4.

Making the valve body elastic in combination with a spherical saddle allows smoothly adjusting the flow rate while simultaneously suppressing excessive pressure, eliminating vibration, and if necessary, gradually closing the saddle without creating a hydraulic shock, which is caused by a sharp cut-off flow. In the non-working position of the hydrant-water outlet, most of the membrane is unloaded from one-sided pressure of water, since both cavities of the housing are interconnected, and the water is discharged by a branch pipe located in the center of the membrane. The unilaterally loaded central part rests on the grating, which receives the load. This achieves self-sealing of the elastic closure element with a high degree of sealing, and unloading the membrane along the seal contour increases its service life and reliability. Diverting the water through a flow nozzle with a beveled end in combination with the case, which is inclined at an acute angle to the stand, allows to simplify

55 manufacturing technology design. In addition, the outlet dimensions are reduced and the hydraulic characteristics are improved. ,

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Claims (2)

1. HYDRANT-WATER OUTLET, for example, for a closed irrigation network, comprising a housing divided into two parts by a membrane, a riser inlet pipe and a discharge pipe, characterized in that, in order to improve operational characteristics and simplify the manufacturing technology, it is equipped with a spherical grate located on the outlet pipe installed inside the housing, and the housing is located at an acute angle to the riser inlet pipe, while the end of the outlet pipe is beveled. 2. The hydrant-water outlet according to claim 1, characterized in that the membrane is made elastic.