CN2140471Y - Welding torch - Google Patents

Abstract

The utility model provides a special welding torch for plastic welding, which is characterized in that an oxygen pipe and an acetylene gas pipe are designed as concentric casing pipes, and a combustion chamber for supplying acetylene gas and oxygen for mixed combustion is arranged in an inner pipe. When the utility model is used, the oxygen and the acetylene gas flow into respective pipe through an intake duct and encounter at the outlet end. Through ignition, the oxygen and the acetylene gas are sufficiently combusted in the combustion chamber. Under the action of gas flow, the hot gas flows out through a welding tip, so that the welding to plastic product can be realized.

Description

Welding torch

The utility model is a kind of a kind of device that is used for welding plastic.

Existing welding torch, it by weldering chew, two conduits and the valve, mixing valve, the torch handle that are controlled in the conduit gas flow respectively formed.Because the existence of mixing valve in operation accidentally, produces the tempering accident easily; In addition, acetylene outlet is set directly in weldering chews, and service time, the long slightly acetylene exit that just makes easily produced clogging, thereby it is undesirable to cause weldering to chew gasification.

The purpose of this utility model is the welding torch at existing welding plastic, improves on its basis, and conduit is become one, and reduced volume improves welding quality and speed, easy to use with carry.

The utility model is achieved in that it chews with the weldering that touch mutually the welding position by one, chews the conduit that links to each other, the oxygen valve that is connected in conduit, acetylene valve and torch handle with weldering and forms; Wherein, be provided with the inner catheter of an end-blown concentric with it in the conduit, inner catheter is connected with oxygen valve, acetylene valve respectively with conduit; The sold inside the country ports having of one end of inner catheter is trumpet-shaped combustion chamber, and the tube wall of the loudspeaker port of combustion chamber and horizontal plane angle are the aperture that has the acetylene outflow on 60 ° and the tube wall; In the other end of inner catheter, be provided with a valve seat, inner catheter is directly linked to each other with the oxygen spool.Form concentric tubes between inner catheter and the conduit, difference aerating oxygen and acetylene gas within them make it to reach the purpose of welding plastic, owing to have aperture on the horn-like tube wall of combustion chamber, can avoid little hole plug.

The utility model has not only dwindled the volume of welding torch, but also can improve the quality and the speed of welding.

Followingly the utility model is described further with reference to accompanying drawing:

Fig. 1 is a front view of the present utility model;

Be described with reference to the accompanying drawings the made welding torch of the utility model.

Aerobic, acetylene gas intake duct (2), (3) are installed in handle (1), on intake duct (2), (3), are respectively arranged with oxygen valve (4), acetylene valve (5), be used to control the flow size of two kinds of gases.Concentric conduit (6), (7) link to each other with acetylene, oxygen intake duct (3), (2) respectively.Wherein conduit (6), (7) length are 130 millimeters, 45 ° of radians, and outer catheter (6) is an acetylene hose, and inner catheter (7) is an oxygen hose, and its conduit (6), (7) internal diameter are respectively 5 millimeters, 2 millimeters, and the external diameter of acetylene conduit (6) is 9 millimeters.Have a port to be on the horn-like tube wall in trumpet-shaped combustion chamber (8) to have four apertures (10) in that an end of oxygen catheter (7) is sold inside the country, the aperture is 0.7 millimeter; The gradient of tube wall and horizontal plane is 60 ℃.Combustion chamber (8) links to each other with conduit (6), and weldering is chewed (9) and is connected in this end.The upstream end of oxygen catheter (7) stretch out conduit (6) and in be provided with one with the supporting valve seat (10) of oxygen spool, the oxygen spool can directly be inserted in the oxygen catheter (7).This welding torch in use, oxygen, acetylene gas enter separately conduit (6), (7) from their intake duct (2), (3) respectively under the control of control valve (4), (5), meet in the exit, through igniting, (8) internal combustion in the combustion chamber, under the effect of air-flow, thermal current is chewed (9) through weldering and is flowed out, and realizes the welding to plastic products.This welding torch welding temperature is stabilized in 200 ℃--and between 300 ℃, 220 ℃ is best welding temperature.

Welding torch of the present utility model, it is little to have a volume, flexible operation, the characteristics such as gasification is good, and security performance is good are the special-purpose welding torches of welding plastic.

Claims (3)

1, a kind of welding torch that is used for welding plastic, it chews (9) by one with the weldering that touch mutually the welding position, chew the conduit (6) that (9) link to each other with weldering, valve (4), (5) and the handle (1) that is separately positioned on intake duct (2), (3) formed, and it is characterized in that being provided with in the conduit (6) conduit (7) of an end-blown concentric with it;

2, according to the described welding torch of claim 1, it is characterized in that an end of conduit (7) is sold inside the country has a port to be trumpet-shaped combustion chamber (8), has aperture (11) on the tube wall of horn-like port, tube wall and horizontal plane angle be 60 °;

3, according to claim 1 or 2 described welding torches, it is characterized in that being fixed with valve seat (10) in the conduit (7), conduit (7) directly links to each other with the oxygen spool.

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