SU415446A1 - HYDRAULIC SHUT-OFF VALVE - Google Patents

Description

one

The invention relates to hydraulic devices and serves to block a damaged pipeline.

A hydraulic drainage valve is known, in the case of which a spring-loaded shut-off element is located in the form, a rod with I1 and a cylindrical thickening along which grooves are made.

In the proposed valve for fixing the closure member in the closed position, the spring is made in the form of a split ring placed on the thickened part of the closure member, with a cone between the thickening and the stem.

The drawing shows the proposed valve in a closed and an open position.

In the housing 1 with the inlet 2 and the outlet 3 valves are located the locking needle 4 with throttling grooves 5, the split ring 6 and the nut 7. A handwheel 8 is put on the needle shaft.

But the channel through the valve 2 working fluid flows to the locking needle 4 and, flowed through the throttling grooves 5 and the output valve 3 in the direction of arrow a, enters the pipeline (capacity). At the time of unloading the pipeline (tank) as a result of an increase in fluid flow and an increase in pressure drop at the end of the needle 4, the locking needle, breaking from the split ring 6, closes the outlet valve 3. (Fig. 1). In this way, the split ring 6, squeezing, rests against the end of the nut 7 and into the chamfer on the thickened part of the locking needle 4, pressing it in place.

The locking needle 4 is brought to the "open" position by moving the needle by the handwheel 8 in the direction of arrow b.

Subject invention

A hydraulic oblique clan, in the case of which there is a spring-loaded locking member in the form of a rod with a needle and with a cylindrical thickening, along the side surface of which there are grooves, characterized in that, in order to fix the locking member in the closed position, the spring is designed as a split ring, on the thickened part of the locking member, which is in contact with the stem of the conical surface.