Ultralow-temperature piston actuating type high-pressure valve with buffer function

Abstract

The invention discloses an ultralow-temperature piston actuating type high-pressure valve with a buffer function. The ultralow-temperature piston actuating type high-pressure valve comprises an inletmultilayer shell component and an outlet shell component, wherein the outlet shell component comprises an outlet shell and the like; the outlet shell is of an integral structure and comprises a shelland a guiding barrel; the shell is of a bending pipe shape; one end of the guiding barrel extends out of the hole of one end of the shell, and the other end extends out of a barrel wall on the turn ofthe shell; a leakage hole is introduced out of the shell from the side wall of the guiding barrel, and a blowdown hole is positioned on the barrel wall of the shell and corresponds to the hole of theother end of the shell; a piston rod is installed in the guiding barrel; a control cavity cover plate is installed on one end, which extends out of the barrel wall of the shell, of the guiding barrel; the center of the control cavity cover plate is provided with a control hole; a second auxiliary spring is installed on the piston rod; the outlet shell is connected with the end of the inlet multilayer shell; the guiding barrel is inserted into a main valve. According to the ultralow-temperature piston actuating type high-pressure valve, a valve actuating mechanism is matched and optimized withlarge-flow lower flow resistance so as to meet the requirements of high working condition and reuse for multiple times.

Description

technical field [0001] The invention relates to a piston actuated high pressure valve. Background technique [0002] In the case of small valve structure size and low working pressure, bellows actuation structure is generally used in domestic liquid engine cryogenic valves to isolate control gas and low temperature medium in the past, and realize dynamic sealing function. However, under the working conditions of large valve structure size and high working pressure, bellows design and forming are more difficult, and the cost is extremely high, and the production process of bellows components is complicated and the cycle is very long. Continue to choose the bellows actuation type It is difficult to adapt to the development needs of hydrogen-oxygen engine valves, and the piston actuation form with a simpler structure is selected. [0003] In order to make the valve close reliably and protect the structural parts from damage, the valve is usually given a closing command after t...

AI Technical Summary

Problems solved by technology

To make the valve close reliably and with slow cushioning at the highest rated pressure of the main stage, to protect structural parts, non-metallic seals and prevent the impact of water hammer pressure on the valve pipeline when the main stage is closed, the existing Valve technology is difficult to meet the above requirements

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