Title:
GAS CUTTING TIP FOR PREVENTING BACKFIRE
Document Type and Number:
WIPO Patent Application WO/2013/141466
Kind Code:
A1
Abstract:
The present invention relates to a gas cutting tip, comprising: a flow path connector which is coupled to an outlet of a cutter head and in which an oxygen flow path and a gas flow path for transmitting oxygen and gas are formed around a center and a rim thereof, respectively; an oxygen nozzle which is coupled to a center of a lower end of the flow path connector and in which an oxygen discharge hole is formed on the inside thereof so as to discharge oxygen supplied from the oxygen flow path and, simultaneously, gas guide grooves are formed in a constant interval around a lower end part; a gas nozzle in which the flow path connector is coupled to an outer circumference of a lower end thereof when the oxygen nozzle is provided on the inside thereof and in which a gas discharge hole is formed on the inside thereof so as to discharge gas supplied from the gas flow path along the gas guide grooves, wherein a first front end part of the oxygen nozzle protrudes to the outside farther than a second front end part thereof while also having a semispherical shape, a semispherical recess is formed on the inside of the second front end part of the gas nozzle so as to smoothly discharge the gas, a waterproof protrusion is formed at an upper end of the gas nozzle, a waterproof groove coupled with the waterproof protrusion is formed at a lower end of the flow path connector, the waterproof protrusion is held in the waterproof groove when the gas nozzle is coupled to the flow path connector by a cap nut, a first screw part is formed along an upper periphery of the flow path connector, a coupling nut is coupled to the first screw part, an insertion groove is formed at a center of an upper surface of the coupling nut, and a sealing pad is inserted into the insertion groove to be closely attached to a lower end surface of the cutter head. The present invention can prevent a fire due to a back flow of gas and an explosion from occurring if making contacting state with a basic material when the gas cutter is used, and can block fragments of the basic material or permeation of foreign substances, and can provide excellent watertightness.
Inventors:
YANG TAEHAN (KR)
Application Number:
PCT/KR2012/011005
Publication Date:
September 26, 2013
Filing Date:
December 17, 2012
Export Citation:
Assignee:
YANG TAEHAN (KR)
International Classes:
B23K7/10; F23D14/54; F23D14/58
Foreign References:
| KR19980081963A | 1998-11-25 | |||
| KR20010010097A | 2001-02-05 | |||
| JPS61128526U | 1986-08-12 | |||
| JPS62103323U | 1987-07-01 |
Other References:
See also references of EP 2829799A4
None
None
Attorney, Agent or Firm:
YU, Keehyun (KR)
유기현 (KR)
유기현 (KR)
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