Method for cleansing/scraping and apparatus therefor

A cleansing and/or scraping apparatus comprising:

• pressure fluid supply means;
• a mixer;
• a fluid supply passage connecting said pressure fluid supply means with said mixer so as to blast a flow of fluid into said mixer at a high speed;
• a gas supply passage connected with said mixer so as to supply pressurized gas to said fluid flow which is blasted in said mixer, such that said pressurized gas is supplied to a mixing space in the mixer and is mixed with the fluid flow while said pressurized gas suddenly expands;
• a powder supply passage connected with said mixer so as to supply powder to said fluid flow which is blasted in said mixer to thereby form a mixture flow composed of said gas, fluid like droplets and said powder;
• and
• a nozzle for blasting said mixture flow at a high speed so that impact actions held by said powder and said droplet-like fluid as cleansing and/or scraping media are given to a surface to be treated so as to carry out a cleansing and/or scraping operation.

A method for forming a cleansing and/or scraping media flow comprising steps of:

• blasting at least pressure fluid and pressure gas into a mixing space in a mixer at a high speed to thereby form a high speed mixture flow of said pressure fluid and said pressure gas;
• sucking gas by an ejector effect based on said high speed mixture flow to thereby form a cleansing and/or scraping media flow containing fluid like droplets;
• and
• blast said cleansing and/or scraping media flow from a nozzle.

A method for forming a cleansing and/or scraping media flow comprising steps of:

• blasting at least pressure fluid and pressure gas into a mixing space in a mixer at a high speed to thereby form a high speed mixture flow of said pressure fluid and said pressure gas;
• sucking gas by an ejector effect based on said high speed mixture flow to thereby form a cleansing and/or scraping media flow containing fluid like droplets;
• and
• blast said cleansing and/or scraping media flow from a nozzle;
• and
• further comprising steps of:
• dividing said mixing space in said mixer into an upstream space and a downstream space by a partition wall having an aperture portion;
• blasting said pressure fluid and said pressure gas at the high speed into said upstream space on an upstream side of said partition wall to thereby suck gas by an ejector effect based on said high speed mixture flow of said pressure fluid and said pressure gas;
• supplying powder to a desirable space in said mixer;
• and
• blasting said cleansing and/or scraping media flow containing said gas, said droplet-like fluid and said powder from said nozzle.

An apparatus for forming a cleansing and/or scraping media flow comprising:

• a mixer having a mixing space formed with a blast port for blasting at least pressure fluid and pressure gas;
• a gas supply pipe connected to said mixing space;
• and
• a nozzle connected to said mixing space,
• wherein gas is sucked from said gas supply pipe by an ejector effect based on a high speed mixture flow containing said pressure fluid and said pressure gas blasted through said blast port so that a cleansing and/or scraping media flow containing fluid like droplets is blasted from said nozzle.

An apparatus for forming a cleansing and/or scraping media flow comprising:

• a mixer having a mixing space formed with a blast port for blasting at least pressure fluid and pressure gas;
• a gas supply pipe connected to said mixing space;
• and
• a nozzle connected to said mixing space,
• wherein gas is sucked from said gas supply pipe by an ejector effect based on a high speed mixture flow containing said pressure fluid and said pressure gas blasted through said blast port so that a cleansing and/or scraping media flow containing fluid like droplets is blasted from said nozzle;
• and
• wherein said mixing space in said mixer is divided into an upstream space and a downstream space by a partition wall having an aperture portion, and at least said pressure fluid and said pressure gas are blasted at a high speed into said upstream space on an upstream side of said partition wall to thereby suck said gas by an ejector effect based on a high speed mixture flow of said pressure fluid and said pressure gas, while powder is supplied to a desirable space in said mixer so as to blast said cleansing and/or scraping media flow containing said gas, said droplet-like fluid and said powder from said nozzle.

A cleansing and/or scraping apparatus comprising:

• pressure fluid supply means;
• mixing means for mixing a fluid and a gas;
• a fluid supply passage connecting said pressure fluid supply means to said mixing means so as to blast a flow of fluid into said mixing means at a high speed;
• a gas supply passage connected to said mixing means so as to supply the gas to said fluid flow which is blasted in said mixing means;
• a powder supply passage connected to said mixing means so as to supply powder to said fluid flow which is blasted in said mixer to thereby form a mixture flow composed of said gas, fluid like droplets and said powder;
• and
• a nozzle for blasting said mixture flow at a high speed so that impact actions held by said powder and said droplet-like fluid as cleansing and/or scraping media are given to a surface to be treated so as to carry out a cleansing and/or scraping operation.