Air asistant liquid jetting nozzle
An air-assisted and nozzle technology, which is applied in the direction of liquid injection device, injection device, injection device, etc., can solve the problems of expensive, expensive, complicated and so on
Inactive Publication Date: 2003-05-21
SPRAYING SYST
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Problems solved by technology
Fixing the elongated spray tip support cylinder to the nozzle body during manufacture, for example by welding, is cumbersome and expensive due to the necessity of precise orientation of the spray tip in order to obtain a properly flat spray pattern.
Also, if a portion of the nozzle assembly becomes damaged or becomes excessively worn during use, the entire nozzle assembly needs to be replaced, which can also be costly
Method used
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[0021] Referring now in more detail to the drawings, there is shown an illustrative continuous metal casting apparatus having an injection system 10 with an air-assisted liquid nozzle assembly 12 embodying the present invention. The continuous casting apparatus, which may be of a known type, comprises a continuous casting mold (not shown) from which a metal shape, in this example in the form of a slab 14, is extruded. In this case a slab 14 exits the continuous caster and is transformed from a vertical orientation to a horizontal orientation by sets of parallel rollers 15, 16 rotatably supported on opposite sides of the exit metal shape. A number of nozzle assemblies 12 are supported between each pair of rollers 15, 16 in a respective row for directing flat spray patterns of coolant, ie water, onto opposing surfaces of the moving metal form 14. The nozzle assembly 12 may be supported by suitable means, which may include suitable plumbing for supplying the compressed air and wa...
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An air assisted spray nozzle assembly, having particular utility in spraying liquid coolants in continuous metal casting systems, is adapted for operation with substantially reduced air consumption. The nozzle body includes a pre-atomizing head that has a relatively small sized pressurized air inlet, a liquid impingement post with a uniquely configured impingement face for enhancing liquid breakdown and intermixing with a pressurized air stream from the air inlet, and an expansion chamber configured to reduce eddy currents that detract from efficient pre-atomization of the liquid. The spray nozzle further includes an elongated spray tip supporting barrel adapted for releasable mounting in the pre-atomizing head in predetermined rotational orientation relative to its longitudinal axis for properly receiving and supporting a removable spray tip.
Description
technical field [0001] This invention relates generally to nozzles, and more particularly to an air-assisted nozzle assembly which is particularly useful for spraying liquid coolant in metal casting operations. Background technique [0002] In metal casting operations, especially in continuous metal casting systems where steel slabs, billets, or other metal shapes are extruded from dies, it is necessary to spray the extruding metal with a liquid coolant, or water, to remove heat quickly. For uniform cooling, it is desirable to atomize the jet finely and to impinge the metal uniformly. Uneven distribution of liquid coolant causes uneven cooling of the metal, which can cause cracks, high stress and reduced surface and edge quality. To aid in the breakup and dispersion of liquid particles, liquid injection systems assisted by compressed air are known. US Patent 5,491,099, assigned to the same assignee as this application, discloses an air assisted nozzle assembly that has bee...
Claims
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IPC IPC(8): B05B1/00B05B1/04B05B7/04B22D11/124
CPCB05B1/042B05B7/0483B22D11/1246
Inventor C·霍夫赫尔K·W·坦纳
Owner SPRAYING SYST