HYDRAULIC SHOCK DAMPING DEVICE AND METHOD OF ITS USE Russian patent published in 2023 - IPC F16L55/45 

FIELD: hydraulics.

SUBSTANCE: equipment for protection of pipelines against destruction as a result of pressure pulses in the liquid accompanying hydraulic shock that occurs when pumps are turned on, operated and turned off, valves, gate valves and other devices are opened and closed. The hydraulic shock damping device contains hollow cylindrical body 1 with inlet 2 and outlet 3 pipes, an additional cylindrical body made in the form of glass 4, annular chamber 5 formed between wall 6 of body 1 and the wall of glass 4 are placed coaxially inside body 1. Body 1 is equipped with a master throttle in the form of orifice hole 8 located at the end of glass 4, and adjustable throttle 9, which connects annular chamber 5 and the internal volume of glass 4. At the end of glass 4 there is movable annular plate 10, which, along the inner diameter, is inserted with a gap into groove 11 formed on the outer surface of the end of glass 4, and along the outer diameter with a gap interacts with the outer surface of annular chamber 5 and has the ability to change the cross-section of adjustable throttle 9. Movable annular plate 4 divides the cavity of body 1 into left 12 and right 13 cavities and has a period of natural oscillations less than the rise time of the pressure difference. Adjustable throttle 9 is made in the form of an annular slot along the outer diameter of right cavity 13. When there is a pressure surge in the hydraulic line, the front of the high-pressure wave enters body 1 through inlet pipe 2, while part of the liquid through openings 14 enters left cavity 12. The other part of the liquid passes through orifice hole 8 into right cavity 13, acting on both sides of movable annular plate 10, which comes to an equilibrium position taking into account the period of its own oscillations, which is less than the time of rise of the pressure difference. In this case, movable annular plate 10 deviates from the vertical axis, and its lower end remains in groove 11 of the upper surface of cup 4, and the upper end partially overlaps annular slot 9. Next, the liquid from cavity 13 through annular slot 9 enters annular chamber 5 and is removed from the device through outlet pipe 3.

EFFECT: improved performance by reduction of the delay time of device response and preventing appearance of a shock wave.

2 cl, 2 dwg