CN2373689Y

CN2373689Y - Liquified petroleum gas welding nozzle

Info

Publication number: CN2373689Y
Application number: CN 99202831
Authority: CN
Inventors: 林响阳; 江敦林
Original assignee: LIANHENG WELDING AND CUTTING EQUIPMENT CO Ltd XIAMEN
Current assignee: LIANHENG WELDING AND CUTTING EQUIPMENT CO Ltd XIAMEN
Priority date: 1999-01-29
Filing date: 1999-01-29
Publication date: 2000-04-12
Anticipated expiration: 2009-01-29

Abstract

The utility model relates to a gas welding nozzle for a liquified petroleum gas, which particularly belongs to the technical field of welding technology. A core is arranged in an outer sleeve of the welding nozzle, the rear section of the core forms a tight fit with the inner wall of the outer sleeve of the welding nozzle, an airflow channel is formed from the front section of the core and the inner wall of the outer sleeve of the welding nozzle, a section of airflow holes are axially arranged in the rear section of the core, airflow side holes are arranged on the core in the radial direction, and the airflow holes in the core are communicated with the airflow channel through the airflow side holes. The utility model uses the welding nozzle to weld, has the advantages of flame concentrating and good welding quality, and can improve the mechanical properties of the welding joint.

Description

Oil liquefied gas gas welding tip

The utility model belongs to welding technology field, refers in particular to a kind of oil liquefied gas gas welding tip.

In May, 1998, held the 5th Essen, Beijing welding exhibition in Beijing.According to situation that can be exhibition by this as seen, domestic some institute of welding and be engaged in the specialized factory that welding and cutting device is produced at present, just a kind of at development and design is the gas welding tip of combustion newspaper with the oil liquefied gas, to be used for mild-steel sheet (≤3mm) welding.The common feature of this class tip structure as shown in Figure 1, 2, a fuse 2 is set in tip overcoat 1, the inwall of fuse 2 back segments and tip overcoat 1 is and closely cooperates, the inwall of fuse 2 leading portions and tip overcoat 1 forms a gas channel 11, be axially arranged with air-flow through hole 21 in the fuse 2, radially offer air-flow side opening 22 on the fuse 2, the air-flow through hole 21 in the fuse 2 is communicated with gas channel 11 by this air-flow side opening 22.

The flame that tip produced of this structure is shown in Fig. 3,4, the characteristics of this flame are: it comprises border flame and flame of centre, because of flame of centre is to be formed by the fuel gas buring of directly deriving from air-flow through hole 21, and border flame is to be formed by the fuel gas buring through air-flow side opening 22 and gas channel 11 derivation, the flow velocity of the former combustion gas is obviously greater than the flow velocity of latter's combustion gas, and this flame that this structure tip is produced is the very big needle-like flame of a kind of flame of centre deflection.Disadvantage when carrying out gas welding is: one, flame is not concentrated, and weld metal needs heat time heating time long, makes weld metal easily oxidized; Two, the strong stirring of this needle-like flame butt welded seam liquid metal easily makes the strong oxidation of weld seam and produces pore.The tip of this structure imposes the appearance of weld extreme difference of welding, and easy burn through steel plate, thereby greatly reduces the mechanical property of welding point, makes this tip to weld normally.

The purpose of this utility model is to provide the oil liquefied gas gas welding tip that a kind of deflection is even, flame is concentrated, weldquality is good, to improve the mechanical property of welding point.

The utility model is to realize above-mentioned purpose like this:

A fuse is set in the tip overcoat, the inwall of fuse back segment and tip overcoat is and closely cooperates, the inwall of fuse leading portion and tip overcoat forms a gas channel, back segment is axially arranged with one section airflow hole in the fuse, radially offer the air-flow side opening on the fuse, the airflow hole in the fuse is communicated with gas channel by this air-flow side opening.

Leading portion is axially arranged with a circle perforation along periphery in the above-mentioned fuse, and this circle perforation is connected with airflow hole.

Above-mentioned fuse front end forms and is the combustion gas conduction trough that " ten " font distributes.

Above-mentioned fuse front end forms the combustion gas conduction trough that is " ten " font.

After adopting said structure, the utility model is because of only being axially arranged with one section airflow hole at back segment in the fuse, rather than in whole fuse, be axially arranged with an air-flow through hole, this makes the combustion gas can only be through airflow hole, air-flow side opening and gas channel, from the combustion gas conduction trough, derive, or through airflow hole, derive from perforation, but not existing tip can be from the center, periphery two derives, flame is concentrated, and helps tip and normally welds, and weld seam does not have slag inclusion, pore, the weld seam oxidation is minimum, and weldquality is good, the good mechanical properties of formed welding point.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the cut-away view of existing tip;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the flame structure schematic diagram of existing tip;

Fig. 4 is the right view of flame among Fig. 3;

Fig. 5 is the cut-away view of the utility model tip;

Fig. 6 is the right view of Fig. 5;

Fig. 7 is the flame structure schematic diagram of the utility model tip;

Fig. 8 is the right view of flame among Fig. 7;

Fig. 9 is the cut-away view of another embodiment tip of the utility model;

Figure 10 is the right view of Fig. 9;

Figure 11 is the cut-away view of the another embodiment tip of the utility model;

Figure 12 is the right view of Figure 11.

See also shown in Fig. 5,6, the utility model is provided with a fuse 2 in tip overcoat 1, the inwall of fuse 2 back segments and tip overcoat 1 is and closely cooperates, the inwall of fuse 2 leading portions and tip overcoat 1 forms a gas channel 11, be axially arranged with one section airflow hole 23 in fuse 2 back segments, radially offer air-flow side opening 22 on the fuse 2, this air-flow side opening 22 also can be an oblique angle (expressing among the figure) with fuse 2 central shafts, and the airflow hole 23 in the fuse 2 is communicated with gas channel 11 by this air-flow side opening 22.Fuse 2 front ends form and are the combustion gas conduction trough 12 that " ten " font distributes.

Cooperate shown in Fig. 7-8, the utility model is because of only being axially arranged with one section airflow hole 23 at back segment in the fuse 2, rather than in whole fuse 2, be axially arranged with an air-flow through hole 21, this makes the combustion gas can only be through airflow hole 23, air-flow side opening 21 and gas channel 11, derive from combustion gas conduction trough 12, can not derive from the center and the periphery of mouth end and do not resemble in as shown in Figure 1, 2 the existing tip combustion gas, flame is concentrated, weldquality is good, the good mechanical properties of formed welding point.

See also shown in Fig. 9-10, fuse 2 front ends also can form the combustion gas conduction trough 13 that is " ten " font in the utility model again, and combustion gas conduction trough 13 is a tapering vertically, and shrink to the mouth end gradually.Thus, even the tip combustion gas can only be derived from combustion gas conduction trough 13 through airflow hole 23, air-flow side opening 21 and gas channel 11, flame is concentrated, and weldquality is good, the good mechanical properties of formed welding point.

See also again shown in Figure 11-12, the utility model also can be in fuse 2 leading portion be axially arranged with a circle perforation 14 along periphery, this circle is bored a hole and 14 is connected with airflow hole 23.Like this, combustion gas both can be derived from combustion gas conduction trough 12 through airflow hole 23, air-flow side opening 21 and gas channel 11, again can be through airflow hole 23, from 14 derivation of boring a hole, formed flame is still concentrated, weldquality is good, the good mechanical properties of formed welding point.

Claims

1, a kind of oil liquefied gas gas welding tip, a fuse is set in the tip overcoat, the inwall of fuse back segment and tip overcoat is and closely cooperates, the inwall of fuse leading portion and tip overcoat forms a gas channel, radially offer the air-flow side opening on the fuse, it is characterized in that: be axially arranged with one section airflow hole in the fuse back segment, the airflow hole in the fuse is communicated with gas channel by the air-flow side opening.

2, oil liquefied gas gas welding tip as claimed in claim 1 is characterized in that: leading portion is axially arranged with a circle perforation along periphery in the fuse, and this circle perforation is connected with airflow hole.

3, oil liquefied gas gas welding tip as claimed in claim 1 is characterized in that: the fuse front end forms and is the combustion gas conduction trough that " ten " font distributes.

4, oil liquefied gas gas welding tip as claimed in claim 1 is characterized in that: the fuse front end forms the combustion gas conduction trough that is " ten " font.