Multi-hydraulic device for testing volumetric expansion in pressurized transportable equipment vessels

Abstract

The utility model relates to a multi-hydraulic device for testing volumetric expansion in the testing of pressure vessels for transportable equipment, such as welded and seamless gas cylinders and other vessels for technical gases subject to initial and periodic technical inspections. The device includes a high-pressure hydraulic pump (14), a measuring cylinder (1), a pressure gauge (6), an adjustable relief valve (8), check valves (5), safety valves (3), and precision valves (2), a bleed valve (13), and multiple connection assemblies for simultaneously testing several vessels. During testing, the volume of working fluid returned after pressurization is measured, which allows for the precise determination of volumetric expansion and the identification of residual plastic deformations. The proposed device ensures precise measurement, increases productivity by allowing simultaneous testing of multiple vessels, eliminates the need for immersion in water and the use of templates, and enhances the safety and reliability of the technical inspection process. The utility model is used by companies and regulatory agencies involved in the manufacture, repair, maintenance, and periodic technical testing of transportable pressure vessels.