SU120105A1 - Check valve for trunk pipelines - Google Patents

Description

The subject of the invention is a check valve for large-diameter pipelines made in the form of a blocking body, which is turned by the flow of fluid.

A special feature of the valve proposed is low hydraulic resistance, achieved due to the fact that the valve body, mounted directly in the pipeline, is made as part of the cylindrical surface of a pipe with an outer diameter equal to the internal diameter of the pipeline to be closed and limited by the line of intersection of this pipe with the pipeline at an angle, close to direct, in the order of 80 °.

FIG. 1 shows the intersection of two pipes, making it possible to obtain the proposed valve; in fig. 2 and FIG. 3-two projections of the pipeline with the valve open; in fig. 4-pipe with closed valve; in fig. 5 is a cross-sectional view of a valve seal.

Valve operation is as follows.

When the fluid flow is from left to right (Fig. 2), the valve body L turns on hinge 2, takes the position of the minimum resistance, pressing the liquid pressure to the inner wall of the pipeline 3.

When the liquid head drops (or stops) (Fig. 4), the valve /, turning in the hinge 2, enters the seal (Fig. 5) formed by the stops 4 and the rubber band 5, closing the pipeline 3.

Subject invention

A check valve for pipelines, which is turned by the fluid flow relative to the axis located in the upper part of the pipeline, characterized in that, in order to reduce the hydraulic resistance of the valve in the open position and to simplify its design, the valve body is made as part of a cylindrical surface of the pipe with an outer diameter, equal to s, m internal diameter of the pipeline to be closed and a limited line of intersection of this pipe with the pipeline at an angle close to the straight line, for example, 80 °.