SU1737206A1 - Check valve - Google Patents

Abstract

Usage: in the means of automatic shut-off of pipelines. SUMMARY OF THE INVENTION: In the cavity 11 of the housing 1 between the coaxially inlet and outlet pipes 2, 3, there is a shut-off member with sealing surfaces 7, 8, which form a stop pair with the corresponding saddle surfaces 4, 5. The pipe 3 is made in the form placed in the cavity 11 of the bent knee. The surface 8 is made conical. The outlet part of the nozzle 3 is provided with a flange 12. The locking member is made in the form of a plate 6 with a central divider 9 formed on the inner bottom part 10 and directed towards the nozzle 3. The area of the gap between the surfaces 7, 8 is not less than the cross section of any of the nozzles 2 3. 1 Il. Yo

Description

The invention relates to pipeline fittings, in particular, to means of automatic shut-off of pipelines, and can be used in all branches of the national economy in which pipeline transport is used.

The purpose of the invention is to increase the reliability of the valve by reducing the hydraulic resistance.

The drawing shows a check valve, a general view,

The check valve includes a housing 1 with coaxially made inlet 2 and outlet 3 nozzles with saddle tapered surfaces 4 and 5. The locking member is made in the form of a plate 6 with conical sealing surfaces 7 and 8 and a central divider 9.

The central divider 9 is formed on the inner bottom 10 of the plate 6 and is directed toward the branch pipe 3, which is made in the form of a bent knee placed in the cavity 11 of the housing 1. The outlet part of the branch pipe 3 is equipped with a flange 12. The housing 1 has an outlet pipe 13 with a flange 14, and the inlet 2 outlet - flange 15.

The area of the gap between the conical saddle surface 4 (5) and the conical sealing surface 7 (8) is not less than the flow area of any of the pipes 2, 3 and 13. Part of the cavity 11 of the housing 1, bottom part 10 of the plate 6 and part of the channel 3 branch pipe form a hydraulic valve.

The valve operates as follows.

Upon receipt of the working environment in the inlet pipe 2, the impact on the plate 6, presses it to the saddle conical surface 5 and overlaps the channel of the outlet 3 pipe. Through the resulting gap between the saddle conical surface 4 and the plate 6, the working medium enters the outlet 13 nozzle.

VI

WITH

s

N) o o

When reverse pumping is performed, the flow enters the outlet 13 nozzle and, acting on the plate 6, presses it to the saddle conical surface 4. Through the gap between the saddle conical surface 5 and the conical sealing surface 7, the flow enters the channel of the branch 3 nozzle. The convex-concave portion of the plate b ensures reliable overlapping of the channels of the inlet 2 and branch pipe 3.

The presence of a central divider 9, made on the concave part of the plate 6, provides for a change in the direction of the working medium.

Claims (1)

Invention Formula A check valve, comprising a housing with coaxially formed inlet and outlet pipes with saddle surfaces and an outlet pipe, and installed in the cavity of the housing between the inlet and outlet and 1-6 Leader M.Denisenko Editor A.DolinichTekhred M.MorgentalKorrektor A.Osaulenko Order 1880 Circulation: Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. by the connecting pipes, the closure member with sealing surfaces that form a closure pair with the corresponding saddle surfaces of the said connections; 5 characterized in that, in order to increase the reliability of operation, the branch pipe is made in the form of a bent knee placed in the body cavity, the saddle surface is tapered, and the outlet part of the branch pipe is flanged, the closure body is made in the form of a plate with conical sealing surfaces and a central divider formed on the inner bottom part and directed towards the branch pipe, while the area of the gap between the conical saddle surface and the conical seal noy surface of the closure member is not less than 20 area flow area at any of the ports.