| 摘要 |
<p>A powder pump for pumping air entrained solid particulate powder material comprising a pneumatic coveyor line (38) within which there is located a low pressure venturi pumping chamber (64). This venturi pumping chamber is intersected by a powder supply passage (74) through which powder is drawn into the conveyor line. Located within the powder supply passage is a tubular powder diffuser (100) through which metering air flow is directed into the powder supply passage to control the rate of flow of powder through the powder supply passage and into the venturi pumping chamber (64). The metering air flow passes through the diffuser at an angle directed toward the venturi pumping chamber and flows into the powder supply passage (110) of the diffuser (100) at an angle tangential to the flow passage.</p> |
