| 摘要 |
An abrasive blasting system which includes an improved mixing and control valve assembly together with an improved manually operable discharge nozzle assembly. The mixing and control valve assembly comprises a housing defining first and second chambers connected by a generally circular opening. An abrasive particle inlet and an outlet are formed in the second chamber. A stem extends axially through the opening between the first and second chambers to define an open annular passageway through which pressure fluid supplied to the first chamber passes in a swirling motion to mix with the abrasive particles in the second chamber and impel them out the outlet. A valve member carried by the stem is arranged for selective engagement with the outlet to stop flow through the assembly. The discharge nozzle assembly includes means for controlling actuation of the mixing valve and is provided with a lever-type operating handle and an associated lever arranged to automatically assume a safety lock position and prevent inadvertent actuation of the operating handle.
|
