Powder conveying injector for conveying coating powder and Venturi nozzle assembly
AssigneeGema Switzerland GmbH
InventorsMarco Sanwald, Roger Tobler
Life of this patent
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Abstract
Disclosed are a Venturi nozzle arrangement for powder conveying injectors and corresponding powder conveying injectors. The Venturi nozzle arrangement has a first region, which serves as a drive nozzle, and a second region, which serves as a collecting nozzle, wherein the second region has a channel that serves as a stream collecting channel with a longitudinal axis, and wherein the first region has a nozzle opening which lies axially opposite the stream collecting channel, the first and second regions of the nozzle arrangement being inseparably connected to one another as a combined component.
Claims22
A powder conveying injector for conveying coating powder comprising
- a drive nozzle extending along a longitudinal axis, the drive nozzle comprising:
- a powder passage disposed about the longitudinal axis and having a powder inlet situated at an upstream end of the drive nozzle and configured to be fluidly connected to a powder container, the powder passage defined by a circumferential wall;
- a nozzle projection extending from the circumferential wall into the powder passage, downstream of the powder inlet, the nozzle projection comprising:
- a conveying air nozzle opening arranged substantially coaxially within the powder passage and directed downstream along the longitudinal axis;
- a conveying air inlet arranged non-axially with respect to the longitudinal axis;
- and
- a conveying air channel directly connecting the conveying air inlet and the conveying air nozzle opening;
- wherein the drive nozzle is configured to direct conveying air axially along the longitudinal axis into a conveyed powder drawn from the powder inlet;
- and
- a collecting nozzle, wherein the collecting nozzle comprises a stream collecting channel disposed axially opposite from the drive nozzle at a distance and concentric with the longitudinal axis, and wherein:
- the collecting nozzle and the drive nozzle are consolidated into one component such that the collecting nozzle and the drive nozzle can only be replaced simultaneously.
A powder conveying injector for conveying coating powder comprising
- a drive nozzle extending along a longitudinal axis, the drive nozzle comprising:
- a powder passage disposed about the longitudinal axis and having a powder inlet situated at an upstream end of the drive nozzle and configured to be fluidly connected to a powder container, the powder passage defined by a circumferential wall;
- a nozzle projection extending from the circumferential wall into the powder passage, downstream of the powder inlet, the nozzle projection comprising:
- a conveying air nozzle opening arranged substantially coaxially within the powder passage and directed downstream along the longitudinal axis;
- a conveying air inlet arranged non-axially with respect to the longitudinal axis;
- and
- a conveying air channel directly connecting the conveying air inlet and the conveying air nozzle opening;
- wherein the drive nozzle is configured to direct conveying air axially along the longitudinal axis into a conveyed powder drawn from the powder inlet;
- and
- a collecting nozzle, wherein the collecting nozzle comprises a stream collecting channel disposed axially opposite from the drive nozzle at a distance and concentric with the longitudinal axis, and wherein:
- the powder inlet is disposed axially opposite the stream collecting channel at a distance.
A Venturi nozzle assembly for powder conveying injectors, wherein the Venturi nozzle assembly has a first region serving as a drive nozzle and a second region serving as a collecting nozzle, wherein the first and second regions extend along a longitudinal axis and are inseparably connected together as one consolidated component;
- wherein the first region serving as the drive nozzle comprises:
- a powder passage disposed about the longitudinal axis and having a powder inlet situated at an upstream end of the drive nozzle and configured to be fluidly connected to a powder container, the powder passage defined by a circumferential wall;
- a nozzle projection extending from the circumferential wall into the powder passage downstream of the powder inlet, the nozzle projection comprising:
- a conveying air nozzle opening arranged substantially coaxially within the powder passage and directed downstream along the longitudinal axis;
- a conveying air inlet arranged non-axially with respect to the longitudinal axis;
- and
- a conveying air channel directly connecting the conveying air inlet and the conveying air nozzle opening;
- wherein the drive nozzle is configured to direct conveying air axially along the longitudinal axis into a conveyed powder drawn from the powder inlet;
- and
- wherein the second region serving as the collecting nozzle comprises a channel disposed concentric with the longitudinal axis and serving as a stream collecting channel.
Dependencies are inferred from the claim text.