PL170508B1 - A by-pass valve with reduced sound level, especially for gas - Google Patents

Abstract

A bypass and shut-off valve with a reduced sound level, especially for gas, comprising an active elastic element closing the valve clearance with non-flat contact surfaces, especially spherical or constituting parts of a body of revolution, characterized in that a gas conduit (2) is located stationarily in the valve body (1) transversely to the flow axis of the medium (P), having two permanently connected, preferably identical, elongated oval sieve ends (3) positioned in the flow axis of the medium (P), coated together with the gas conduit (2) with a uniform, elastic, tight contact coating (4).

Description

The subject of the invention is a by-pass valve with a reduced sound level, especially for gas.

The invention relates to the construction of valves for gaseous media with an active elastic closing element.

Flexible elements with non-planar, especially spherical, seating surfaces are known in the construction of valves for liquid media, especially quick-acting mushroom valves. In some valves, their flexible plugs have the shape of a segment of a rotary epicycloid that flexibly conforms to the valve seat according to the pressure of the fluid medium shut off by the valve.

Known valves with flexible closing elements, despite their common use in the construction of mushroom valves for liquid media, are not suitable for use in the construction and operation of gas shut-off valves, especially ventilation valves.

The invention solves the problem of developing a new design of the gas shut-off valve, which eliminates the unfavorable flow of the gaseous medium occurring in this type of valves, resulting in a significant noisiness of operation.

A by-pass valve with a reduced sound level, especially for gas, comprising the known active elastic element closing the valve lumen with non-planar seating surfaces, especially spherical or forming part of a rotary body, is characterized in that according to the invention, it is situated transversely to the medium flow axis in the valve body a stationary gas conduit having two permanently connected, preferably identical, elongated oval screen ends, arranged in the axis of the flow of the medium, covered with a gas conduit of a uniform structure with a flexible, tight rebate coating.

Due to the use of a fixed pneumatic closing element in the solution according to the invention, cooperating with a flexible, pressure-tight rebate coating inflated from the inside, it turned out to be possible to implement a gas valve in which the gas medium is throttled in laminar flows and does not cause vibrations of the column, resulting in a relatively high noise level.

The subject matter of the invention is shown in an exemplary embodiment in the drawing which shows the valve schematically in longitudinal section.

As shown in the drawing, a shut-off valve with a reduced sound level, especially for gas, comprises a gas conduit 2 in a stationary position transverse to the flow axis of the P medium in the valve body 1, having two fixedly connected, preferably identical to the flow axis P, , elongated oval ethmoid ends 3. There are

170 508, they are coated with a gas pipe 2 of a uniform structure with a flexible, tight, pressure-tight coating 4. The valve according to the invention operates as follows: in the open state, the gas pipe 2 with its two tube ends 3 is covered by a tightly adhering face coating 4, which does not creates disturbances in the flow of P factor through the open valve. In the valve-closed state, the shell 4 is filled with air or other pressurized gas 5 which is introduced into it through a stationary gas line 2 through the oval screen end 3. In this state, the shell 4 takes on a spherical shape 6 and closes the valve lumen.

170 508

Publishing Department of the UP RP. Circulation of 90 copies

Price PLN 2.00

Claims (1)

Patent claim A by-pass-shut-off valve with a reduced sound level, especially for gas, containing an active flexible element closing the valve lumen with non-planar seating surfaces, especially spherical or forming parts of a rotary body, characterized in that it is transverse to the medium flow axis (P) in the body (1) valve, there is a fixed gas conduit (2) having two permanently connected to it, preferably identical, elongated oval tube ends (3), coated with the gas conduit (2) of a uniform structure, flexible, tight a rebate coating (4).