Connectable chamber for porthole testing

Abstract

The invention relates to shipbuilding and can be used for strength and leakage tests of the portholes of low-volume submersible vehicles. A connectable chamber is used for increased external pressure testing of the submersible vehicle portholes (1) which are arranged in a cylindrical body (socket welded connection) (2) provided with a supporting flange (11). The body of a chamber (4) is embodied at least partially in the form of a spherical surface and comprises a joining flange (9) which is provided with an internal annular collar (10) embodied in such a way that it encompasses the porthole (1). A device (14) for pressing the body (4) against the socket welded connection (2) is embodied in the form of a banding ring (15) provided with a sectional annular insert (16) arranged thereinside the contact surfaces of the ring and insert being embodied in the form of the surface a truncated cone. The annular insert (16) is provided with an annular slot for simultaneously embracing the supporting (11) and joining (9) flanges. The ring (15) is tightened by bolts (17), whereby the perfect junction thereof to the annular insert (16) and the tight crimping of the spherical body of the chamber (4) through a sealing ring are maintained. A working medium is supplied inside the body (4) by an internal pressure source. The inventive device reduces the test duration, increases the reliability thereof and can be used directly during the submersible vehicle operation.

Description

technical field [0001] The invention belongs to the technical field of shipbuilding, and can be used for testing the strength and leakage of portholes of small submarines. Background technique [0002] Test devices for the strength of portholes already exist (see Stegiv I.G., Grey K.O., Designing Safety Portholes for Pressurized Cabins, Journal of the American Society of Mechanical Engineering No. 4, 1971, pp. 61-72). This known device includes a strong pressure vessel (with a pressure gauge), a thermometer, a gauge for measuring the displacement of the thickness of the porthole, and a television camera which continuously records the displacement of the porthole under test. This known device can measure the tension of the test chamber with high accuracy and also measure the necessary reserve strength factor under the pressure of 6.9MPA at an ambient temperature above 65°C and for a long time (10-20 hours). (Shrinkage factor) Kr to ensure the strength of the porthole. The s...

AI Technical Summary

Problems solved by technology

However, the tightness of the connection cannot be guaranteed in the case of high external pressures during the test, due to the specificity of the interaction between the different materials of the components in contact with each other

In sea water, these elements made of steel are screwed to the submarine made of special alloys, which increases the risk of material transfer (water leakage to the outside of the cabin)

Also, in order to install the cabin on the porthole body (hull of the submarine) along the threaded connection, it is necessary to turn over the cabin with a large weight and volume, which complicates the testing of small submarines

Images