HIGH PRESSURE PUMP FOR FEEDING LNG

摘要

The present invention provides a high pressure cryogenic pump for transporting liquefied natural gas (LNG). According to the present invention, a chamber body (10) of the high pressure pump comprises an inlet (In) into which LNG flows, and a compression space (C) formed therein. A piston rod (20) comprises a shaft portion accommodated in a shaft storage unit (10A) of the chamber body in an airtight condition with respect to the outside and a head portion stored in the compression space, and reciprocates by an external drive force. An intake valve is installed on the inlet of the chamber body to allow the LNG to pass only through the compression space. A poppet valve is installed on an outlet of the chamber body to discharge the LNG compressed to a high pressure. In addition to this, a return route connecting a connection passage formed near an end opposite to the outlet in the compression space and the inlet of the chamber body is installed, and an out chamber (30) is installed on the outer side of the chamber body (10) to form a chamber (F) which is a space for insulation.