SU1120076A1 - Automatic water drain device for protecting pipeline from freezing - Google Patents

Abstract

AUTOMATIC WATER OUTPUT FOR PROTECTION OF THE PIPELINE FROM FREEZING, containing a housing with openings placed inside the pipeline, a valve and a drainage pipeline, characterized in that, in order to increase the protection of the pipeline against freezing, the housing openings are located along the pipeline wall and the drainage pipeline is coaxially inside enclosures.

Description

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This invention relates to devices for protecting pipelines from defrosting when ice is formed on the inner surface.

Known automatic issues of water 1.

The disadvantage of these devices is the presence of a complex sensing element, as well as the fact that water is discharged into them not when ice forms in the pipeline, but because the temperature drops to a certain predetermined limit in a chamber filled with liquid.

The closest to the proposed is the automatic release of water to protect the pipeline from freezing of the structure A.V. Lutov, consisting of a housing with openings located inside the pipeline, a valve and a drain pipeline C2.

The disadvantage of the known release is that it works when the pressure in the hermetic chamber is increased, and pressure may not only occur when ice is formed, since ice has a specific gravity less than the specific weight of water, but also when the water cools from 4 to 0 ° C. and when water is heated, it is higher than 4 ° С, since at a temperature of 4 ° С the specific weight of water is maximum. In addition, in order to align the mode of ice formation in the chamber with the mode of ice formation in the pipeline itself, the device requires a long adjustment and regular adjustment required when the ambient temperature fluctuates.

The purpose of the invention is to increase the efficiency of protection of the pipeline from freezing.

This goal is achieved by the fact that in the automatic release of water to protect the pipeline from freezing, consisting of a housing with openings located inside the pipeline, a valve and a drainage pipeline, the housing openings are located along the pipeline wall and the drainage pipeline is installed coaxially inside the housing.

The drawing shows the automatic release, cut.

Automatic release is installed in line 1 and consists of body 2

with two holes 3, made in the part of the housing in contact with the pipeline, the drain pipe 4 installed coaxially inside the case, while the upper end of the drain pipe is closed by a valve 5 with a rubber seal 6, an annular piston 7, with the help of racks 8 rigidly connected with valve 5.

The device works as follows.

Under normal conditions, the valve 5 with the pressure of water in the pipe 1 is pressed against the drain pipe 4 and prevents leakage of water. The annular cavity bounded by the casing and the drain pipe, the piston 7 and the pipe wall, due to the presence of two holes in the outer cylinder, is flow-through, and the movement of water in the cavity prevents the formation of ice in the cavity earlier than on the pipe walls.

When the internal surface of the pipeline is frozen, the thickness of the ice within the annular cavity corresponds to the thickness of the ice in the pipeline.

When the thickness of the ice layer is equal to the height of the holes in the housing, the holes are completely covered with ice and the annular cavity is sealed. The circulation of water in the annular cavity is stopped, and the process of ice formation is intensified. Since when the water freezes, the volume of ice that is formed exceeds the volume of the freezing water, the pressure in the annular cavity rises sharply and the piston 7 and valve 5 connected to it rises upwards. Water is released into the gap formed between the inner cylinder and the locking valve.

When ice melts on the inner surface of the pipeline, the annular cavity depressurizes, the pressure in the cavity and in the pipeline is equalized, the locking valve is lowered and the water discharge stops.

The effectiveness of the proposed automatic release is achieved by eliminating the unreasonable discharge of water from the pipeline.

Claims (1)

AUTOMATIC WATER RELEASE FOR PROTECTION OF THE PIPELINE FROM FREEZING, containing a housing with holes located inside the pipeline, a valve and a drain pipe, characterized in that, in order to increase the efficiency of frost protection of the pipeline, the holes of the housing are located at the pipeline wall, and the drain pipeline is installed coaxially inside the housing . / ^z G— ¹ X / szfezzzzszza / ΖΖΖΖΣΖΖΖΖΖΖΖΕΙ SU. ™ 1120076