Preventing gas from occupying a spray nozzle used in a process of scoring a hot glass sheet

摘要

A spray nozzle is used in a process of quenching a hot glass sheet during a laser scoring process or other high energy glass heating process. The nozzle is located in proximity to the glass sheet, creating gas in the liquid used to quench the glass while in the nozzle. The gas is removed from the quenching liquid. Then, the spray nozzle is used to spray the quenching liquid onto the sheet at a location trailing laser scoring of the sheet. The spray nozzle has a purge opening and tubing leading to a discharge location, and can have a sloped passageway that pre-stages gas bubbles near the purge opening. The spray nozzle can include a cooling coil passing around the nozzle passageway to cool the quenching liquid passing through the nozzle, and increase the solubility of bubbles in the quenching liquid.

主权项

1. A method for preventing gas from occupying a spray nozzle, comprising:
providing a source of pressurized liquid, a main liquid supply line leading from said pressurized liquid source, a spray nozzle including a body having a nozzle passageway in communication with said main liquid supply line, and a tip connected to said nozzle body in communication with said nozzle passageway, said tip having an orifice adapted to release a jet of said liquid, and a gas removal device adapted to remove gas from said liquid; removing gas from said liquid using said gas removal device to prevent said gas from occupying said spray nozzle; spraying a jet of said liquid through said tip orifice without interruption in said jet, wherein said gas removal device comprises a purge opening at an upper location of said spray nozzle in fluid communication with said nozzle passageway; a purge line leading from said purge opening to a discharge location remote from said nozzle purging gas in said nozzle, a primary valve disposed in said main liquid supply line and a secondary valve disposed between said spray nozzle and said discharge location; said method further comprising removing said gas by opening said secondary valve and directing said liquid through said purge opening and along said purge line to said discharge location.