CN201306717Y

CN201306717Y - Oxyhydrogen gas cutting, welding torch

Info

Publication number: CN201306717Y
Application number: CNU2008201772521U
Authority: CN
Inventors: 王俊生; 王永乐; 赵雄飞; 张剑锋
Original assignee: Inner Mongolia First Machinery Group Corp
Current assignee: Inner Mongolia First Machinery Group Corp
Priority date: 2008-11-04
Filing date: 2008-11-04
Publication date: 2009-09-09
Anticipated expiration: 2018-11-04

Abstract

The utility model relates to a oxyhydrogen gas cutting, welding torch, which comprises an oxyhydrogen gas cutting, welding torch assembly, characterized in that a dry type non-return device is connected serially to a oxyhydrogen gas mixing pipe of the oxyhydrogen gas cutting, welding torch assembly. The utility model has the advantages of shortest back fire tempering effective gas piping, minimum wxyhydrogen gas energy in the pipe, nearest distance of the non-return device away from the cutting, welding nozzle channel, easy decompression for the explosion gas, and high operation security.

Description

Oxyhydrogen cutting, welding torch

One, technical field

The utility model relates to a kind of oxyhydrogen cutting, welding torch.

Two, background technology

Oxyhydrogen is extensively promoted the use of by enterprise just day by day as a kind of novel environmental protection and energy saving welding technology, and it is fine that numerical control cutting machine, semi auto cutting machine are used oxyhydrogen cutting actual effect.But some units have frequently run into the tempering problem in using the oxyhydrogen hand cut, the gas leakage because of cutting torch preheat oxygen control valve place once took place, back draft ejection combustion flame scorification regulating valve stem takes place, and handle position just herein, cause greatly at heart fear to fear tempering to the operator, and say the bad use of oxyhydrogen.

Trace it to its cause, the oxyhydrogen cutting has flame temperature height, the fast characteristics of burning velocity, burning velocity offer 12m/s (acetylene burning velocity in oxygen is about 8m/s, and propane burning velocity in oxygen is about 4m/s).Because in the fuel gas pipeline is existing hydrogen, the air mixture of oxygen is arranged again, cutting torch dross, solid particle polluter obstruction gas passage, tracheae pressurized etc. cause the oxyhydrogen flowing velocity to be lower than burning velocity and produce tempering when cutting (weldering) mouth temperature above spontaneous combustion in 400 ℃ of (hydrogen self-ignition point in oxygen is 450 ℃) cutting torch, work, and the hydrogen-oxygen cutting machine has just been started shooting when operating in addition, and aerogenesis pressure is just lighted a fire inadequately, switch air valve order is incorrect also tempering can take place.

When common cutting (weldering) torch uses, usually hinder back the device anti-backfire cutting the dry type of connecting on (weldering) torch combustion gas input and the source of the gas intermediate duct, hindering back device like this, to hinder back effective gas circuit to cutting torch long, and the back draft energy is big, very easily discharges and damage this position from weak links such as joint, regulating spools.When using oxyhydrogen, this phenomenon is particularly outstanding when being exceedingly fast the backfire tempering because of its ignition temperature height, burning velocity.

Three, summary of the invention

The purpose of this utility model provides oxyhydrogen little energy and the easy pressure release of assembling in the effective gas circuit weak point of a kind of backfire tempering, the pipeline of explosion gas, the oxyhydrogen cutting that processing safety is high, welding torch.

The purpose of this utility model is realized by following mode:

The utility model comprises oxyhydrogen cutting, welding torch assembly, it is characterized in that: be serially connected with dry type and hinder back device on the oxyhydrogen mixture pipe of oxyhydrogen cutting, welding torch assembly.

The utility model has the advantages that: the effective gas circuit of (1) backfire tempering is the shortest, and the oxyhydrogen energy is minimum in the pipeline.(2) dry type hinders back that device distance is cut, the tip passage is nearest, the easy pressure release of explosion gas.(3) processing safety height.

Four, description of drawings

Fig. 1 is the structural representation of oxyhydrogen cutting torch of the present utility model.

Among the figure: 1, oxyhydrogen input 2, oxygen input 3, oxyhydrogen control valve 4, hyperbaric oxygen control valve 5, preheat oxygen control valve 6, handle 7, oxyhydrogen mixture pipe 8, soldered fitting 9, dry type hinder back device 10, soldered fitting 11, cutting torch.

Five, the specific embodiment

As shown in Figure 1, be example with the G01-30 cutting torch, the utility model is described in further detail.At the mixture pipe 7 of oxyhydrogen cutting torch assembly apart from the length of cutting torch 11 minimum distance places according to dry type spark arrester 9, radially cut 7 one sections of mixture pipes, use dry type spark arrester 9 soldered fitting 8,10 to insert on the mixture pipe 7, and 9 inputs of dry type spark arrester, output correctly be connected with mixture pipe 7 inlet, outlets, the welding of BCu95P (BCu93P etc.) hard solder is used in soldered

fitting

8,10 and mixture pipe 7 junctions, so just dry type is hindered back device and has been linked on the gaseous mixture pipeline.During cutting operation, open oxyhydrogen control valve 3, under the effect of oxyhydrogen pressure,, carry out cutting work by hindering back device 9, mixture pipe 7, arriving cutting torch 11; When back draft took place, under high temperature, the effect of high-pressure combustion air-flow extension shock power, dry type hindered back device 9 and closes mixed gas inlet, thereby cut off the oxyhydrogen source, and blast expansion gas is from the pressure release of cutting torch passage.Purpose makes backfire flame discharge backfire the most nearby, hinder back at distance cutting torch passage, and in like manner, the structure of oxyhydrogen welding torch is identical with cutting torch, also is that the serial connection dry type hinders back device on the oxyhydrogen mixture pipe.

Structure of the present utility model also is applicable to acetylene, propane welding handwork work fully.

Claims

1, a kind of oxyhydrogen cutting, welding torch comprise oxyhydrogen cutting, welding torch assembly, it is characterized in that: be serially connected with dry type and hinder back device on the oxyhydrogen mixture pipe of oxyhydrogen cutting, welding torch assembly.