Supporting device for fuel gas double-wall pipeline inner tube

Abstract

The invention discloses a supporting device for a fuel gas double-wall pipeline inner tube. The supporting device comprises a pair of saddle-shaped supporting sheets and two elastic supporting blocks,wherein an inner tube is sleeved in an outer tube; the saddle-shaped supporting sheets clamp the inner tube up and down; the elastic supporting blocks are fixedly arranged at upper and lower sides ofthe two saddle-shaped supporting sheets separately; nylon guide wheels with elastic gaskets at upper and lower sides are separately embedded between horizontal sides of the two ends of one pair of saddle-shaped supporting sheets; the two ends of one pair of the saddle-shaped supporting sheets are separately hinged with the nylon guide wheels through bolts; and the inner tube is fixedly between one pair of saddle-shaped supporting sheets. The supporting device can provide reliable support for the inner tube, and also enables the inner tube to smoothly arrange in the outer tube. Difference of thermal expansion and cold contraction amount of different materials of the inner tube and the outer tube is very great, and the nylon guide wheels can axially roll along the inner wall of the outer tube, so that the saddle-shaped supporting sheets and the inner tube are prevented from being avoided, and therefore, reliability of the supporting device is improved, and the great problem of mountingand using the fuel gas double-wall pipeline inner tube is solved.

Description

technical field [0001] The invention relates to a double-wall pipeline system for supplying gas fuel to a ship engine, in particular to an inner tube support device for keeping inner and outer tubes concentric, and belongs to the technical field of ship engine accessories. Background technique [0002] Clean gas fuel represented by LNG fuel is increasingly used on ships, but gas power fuel is a dangerous gas. The relevant ship regulations clearly require that all natural gas pipelines installed in the cabin must adopt a double-wall structure, and the inner tube is used to transport For natural gas, the annular cavity between the outer pipe and the inner pipe is used for ventilation or filled with an inert gas whose pressure is higher than that of the gas in the inner pipe to avoid the danger of natural gas leakage. The coaxiality of the assembly of the outer tube and the inner tube is required to be very high, so as to meet the smooth air exchange between the inner and outer...

AI Technical Summary

Problems solved by technology

The inner pipe is usually made of stainless steel, and the outer pipe is made of ordinary seamless steel pipe. The thermal expansion and contraction of these two materials

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