SU1337597A1 - Check valve - Google Patents

Abstract

The invention relates to the field of valves and can be used in hydraulic and pneumatic systems to prevent the back flow of the working medium. The aim of the invention is to increase the flow capacity of the valve by increasing the flow area of the membrane without significantly increasing its dimensions. With the forward flow of the working medium coming from the input Channel 2, the membrane 4, made in the form of mating discs 9 and 10, bends up to the stop 8 and the annular slot 12, made in the disk 10, opens by opening the annular recess 11 with holes 13, made in the disk 9 on a diameter larger than the diameter of the stop 8. Thus, the flow of the working medium through the passage channels of the membrane 4 to the output channels 3 is ensured. When countercurrent occurs, the membrane 4 bends towards the seat 7, the annular slot 12 closes yemku 11 and 13. Access holes of the medium flow into the inlet 2 is blocked. 4 il. (O (L fig1

Description

11337597

The invention relates to a valve and can be used in hydraulic and pneumatic systems to prevent the back flow of the working medium.

The aim of the invention is to increase valve throughput by increasing flow through

membrane without significant increase from the top to the top. This closes the colderage of its dimensions. Slot 12, blocking the recess 11 and

FIG. 1 schematically shows a check valve in the open position,

holes 13, stopping the access of the flow of the working environment in the input channel 2, which corresponds to a closed postoperative section; Fig 2 - the same, in the closed position; in Fig, 3 - membrane, top view; in fig. 4 shows section A-A in FIG. 3,

The check valve contains a detachable body 1 with an input 2 and an output 3 channels, an elastic membrane 4 separating the input 5 and output 6 cavities of the housing 1, the saddle 7 made in the input cavity 5 of the housing 1 ,, and the stop 8 placed in the code cavity 6 coaxially saddle 7.

The membrane 4 is made in the form of two disks 9 and 10 which are conjugated to each other with passage channels that are equally located on a diameter larger than the stop diameter of 8 ° On the surface of one of the disks 10 (9) facing the other 5 an annular recess 11 is made, for example, of triangular cross section . Channels on the side of the exit cavity.6 are made in the form of an annular slot 12, which passes into the hollow annular recess 11s and communicates with it and with the entrance cavity 5 holes 13, the axes of which are located on the forming slot 12 "And the holes 13 are made in dis-. ke 9, and the annular slot 12 - in the disk 10. Disks 9 and 10 are either glued to each other, or crawled

The device works as follows. one of the disks facing

at once.

When the working medium is supplied to the inlet channel 2, the membrane 4 bends and lays with its central part 14 on the support 8, as a result of which the annular slot 12 expands, opening a recess 11 with holes 13

and ensuring the passage of the flow of the working medium through the outlet channels 3, which corresponds to the open position of the valve

In the case when the back pressure of the working medium flow exceeds the inlet pressure of the sensitivity threshold of the membrane 4, the last projectile hole 13, the flow of the working medium to the input channel 2 stops, which corresponds to the closed position of the valve. With a further increase in the pressure of the flow of the working medium, the membrane 4 will be propelled before its central part 14 contacts the saddle 7, which prevents it from

destruction and provides reliable compaction.

Claims (1)

Invention Formula A check valve containing a split housing and an elastic membrane placed between the inlet and outlet code of the housing, installed with the possibility of alternate interaction of its central part with the saddle made in the entrance cavity of the housing and with the stop placed in the output cavity of the joint with the saddle, and in the elastic membrane made through channels, evenly spaced on a diameter larger than the diameter of the stop, and made in the form of an annular slot on the side of the exit cavity and holes - on the side of the entrance characterized in that, in order to increase the valve capacity, the elastic membrane is made in the form of conjugated discs, and on top of to the other, an annular recess is made, connecting said non-through annular slot with said holes, wherein the non-circular ring slot and holes are placed in different disks, and the axes of the holes coincide with the forming slot. cpuff.Z / J qOus3 A-A ff 4 Editor Y. Sereda Compiled by A. Biryukova Tehred L. Serdyukova Order 4111/32 Circulation 811 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader N.Korol