Pneumatic conveyer system |
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| 申请号 | US3574410D | 申请日 | 1969-05-05 | 公开(公告)号 | US3574410A | 公开(公告)日 | 1971-04-13 |
| 申请人 | GEMA AG; | 发明人 | BUSCHOR KARL; | ||||
| 摘要 | A pneumatic conveyor system particularly intended for feeding pulverulent and granular coating materials to electrostatic spraying devices. The coating material is supplied from a loading hopper and a distributing chamber to a plurality of diffusors to which a propellant gas is supplied. The diffusors are arranged circumferentially about the distributing chamber and each diffusor is connected to a separate conveyor line leading to an individual spraying device for simultaneous operation of a plurality of spraying devices. | ||||||
| 权利要求 | 1. A pneumatic conveyor system, particularly for powder-spraying apparatus in which powder material is supplied from a loading hopper and blown through the conveyor line by means of a propellent gas stream fed into the line by diffusor means, and which comprises an inlet duct arranged to supply material from said loading hopper into said conveyor line and opening into said diffusor means at a region of substantial vacuum, a second duct also opening into said diffusor means at said region of substantial vacuum and arranged to supply an additional control gas stream into said region, and means for controlling the supply of control gas through said second duct, wherein the improvement comprises a distributor chamber forming the lower end of said loading hopper, a plurality of diffusor means communicating with said distributor chamber, and a separate conveyor line connected to each diffusor means, said second duct being connected with the respective diffusor means by a pipe connection having its axis inclined with respect to the axis of said inlet duct from the distributor chamber to the diffusor means at an angle of less than 90*. 2. The system as claimed in claim 1, in which said pipe connection to each diffusor means is provided at its outer end with a control nozzle. 3. The system as claimed in claim 2, in which said control nozzle is movable along said pipe connection. 4. The system as claimed in claim 2, in which said diffusor means include a diffusor nozzle which is concentrically surrounded by an annular slot nozzle. 5. The system as claimed in claim 1, in which the outlet from said diffusor means into the respective conveyor line is provided with an interchangeable sleeve. 6. The system as claimed in claim 1, in which the inlet duct from said distributor chamber to each diffusor means is directed at right angles to the axis of the distributor chamber. 7. The system as claimed in claim 5, in which said plurality of diffusor means are arranged in star formation on the distributor chamber. 8. The system as claimed iN claim 4, in which the control nozzle of said pipe connection between said second duct and the diffusor means is connected by the intermediary of a first regulating valve to throttling means in the feed line of said propellent gas stream and said diffusor nozzle is directly connected to said throttling means, said regulating valve and throttling means serving to adjust pressure and flow conditions in said region of substantial vacuum in the diffusor means and to loosen the powder entering into the diffusor means through said inlet duct. 9. The system as claimed in claim 8, in which said throttling means is connected by a second regulating valve to a source of propellent gas and means are provided for simultaneous control of both said regulating valves. |
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