ABRASIVE MIXTURE SUPPLY SYSTEM

摘要

A conventional abrasive mixture pressurising system comprises a pressure vessel (15), a nozzle (13) connected to said compartment, an inlet (12) for fluid under pressure to drive the contents of the compartment to the nozzle and a supply of abrasive mixture. This is improved by dividing the pressure vessel interior by a flexible diaphragm (19) to define a compartment. This compartment can have its pressure controlled for various purposes - for example to create pressure surges for an immediate jet of abrasive mixture at the nozzle, or to suck in abrasive particles from a supply.