SU395541A1 - VACUUM BREAKOUT VALVE FOR SIPHON TYPE WATER - Google Patents

Description

one

The invention relates to the field of hydraulic engineering and relates to a vacuum interruption valve for a siphon type water outlet.

Known valves breakdown of vacuum, containing the case with a lid connected by a pipe with throat section siphon outlet.

The purpose of the invention is to improve the reliability of the valve.

This is achieved by the fact that in the valve body there is mounted a membrane partition overlap of the nozzle, which separates the housing into chambers, one of which is connected to the throat section of the siphon outlet, with a pipe bent in the direction of the reverse flow of water in the siphon outlet, and on the cover The casing has a check valve with a large cross-section of the pipeline.

The drawing shows a schematic diagram of the proposed valve.

The vacuum interruption valve contains a pipe / with a connecting flange 2 and a housing 3 mounted on a siphon outlet 4, a membrane 5 that blocks the flow area of the pipe / and is fixed between the rings 6 of the housing 3 and the cover 7. The cavity under the cover 7 is connected to the surrounding atmosphere by check valve 8 n with throat section of the siphon - tube I

the lower end of which is opposite the direct current of the water in the siphon.

The operation of the vacuum breakdown valve of the furniture type is carried out as follows.

When the pump is turned on in the initial period, the ascending branch of the siphon 4 is filled. In the case when the siphon outlet is flooded, an overpressure occurs in the siphon. Due to the difference in area

diaphragm 5 that senses this pressure, the membrane tends to close the valve flow area. The return clanan 5, the flow area of which is larger than the flow area of the tube 9, prevents closure of the flow area of the vacuum interruption valve, makes it impossible to increase the pressure in the cavity under the lid 7 above atmospheric and thereby eliminates the force that could lower the membrane and close the air outlet from siphon. .1 The membrane rises under the pressure in the siphon, releasing air from the siphon. When the water level reaches the crest of the siphon, the air pressure in the siphon becomes equal to atmospheric, and the furniture is lowered by its own weight. When a stream of water is formed, in the mouth of the siphon tube 9 senses the hydrodynamic pressure of the stream of water. Under the membrane will be the pressure on the amount of m of water. Art. more than pressure