INJECTION NOZZLE DEVICE

• Main Author: ADACHI TAKAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 06.02.2020
• Subjects: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; GRINDING; NOZZLES; PERFORMING OPERATIONS; POLISHING; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

To provide an injection nozzle device which improves a grinding efficiency and does not generate clogging of the nozzle due to powdered abrasive grain by injecting to an object, a composite jet flow surrounding the periphery of filamentous high-pressure liquid by the spiral flow of a pressure gas including an abrasive.SOLUTION: An objective injection nozzle device comprises: a main body 30 equipped inside with a space 35 for forming a truncated cone-shaped composite spiral flow; a guide groove 39 guiding a pressure gas spirally along an inner wall of the main body 30; a pressure gas supply tube 37 for supplying the pressure gas to the space along the guide groove 39; an abrasive supply tube 38 supplying the abrasive to the pressure gas to blend in the main body 30; and a liquid pressure-feeding nozzle 33 installed on the main body 30 to supply the injection jet of a high-pressure liquid on an axial core of the space. The device improves a grinding efficiency by making a composite jet flow surrounding the periphery of a small-diameter jet flow of the high-pressure liquid by the spiral flow of the pressure gas collide with a grinding object from the tip nozzle 32 of the main body 30.SELECTED DRAWING: Figure 4 【課題】線状の高圧液体の周囲を研削材を含む圧力気体の旋回流で囲んだ複合噴流を対象物に噴出することにより研削効率の向上を図るとともにノズルの粉末砥粒による目詰りが生じない噴射ノズル装置を提供する。【解決手段】噴射ノズル装置は、内部に円錐台形状の旋回流を形成するための円錐台形状の複合旋回流形成空間３５を備えた本体３０と、この本体３０の内壁に沿って螺旋状に圧力気体を案内するための案内溝３９と、前記圧力気体を前記空間に案内溝３９に沿って送るための圧力気体供給管３７と、前記圧力気体に本体３０内で研削材を混合するように供給する研削材供給管３８と、本体３０上に取付けられ前記空間の軸心上に高圧液体の噴射ジェットを供給するための液体圧送ノズル３３とを備え、前記高圧液体の細径噴流の周りを、研削材を含んだ圧力気体の旋回流で取り囲んだ複合噴流を本体３０の先端ノズル３２から研削対象物に衝突させる。【選択図】図４