JPS5866709A - Ring burner for gas pressure welding - Google Patents

Abstract

PURPOSE:To miniaturize the size of a ring burner and to reduce its weight, by connecting an oxygen chamber and an accetylene chamber provided to the annular base of a ring burner which heats the joined parts of steel tubes partially, with two connecting ports provided to burner nozzles, respectively. CONSTITUTION:Holes 15-1, 15-2, 15-n to fit burner nozzles 20 with desired pitches are provided to the annular base 10 of a burner, and the nozzles 20 are arranged to be directional to the center of an annular base 10. The annular base 10 is provided with an oxygen feed and an accetylene feed systems 13 and 14, along with a cooling water supplying and a water discharging systems 11-1 and 11-2. The rate of oxygen or accetylene to be fed into each nozzle 20 can be controlled by adjusting an adjusting knob 26 or 27, provided to the base body 21, to a suction port 28 or 30 provided to the nozzles 20, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ring burner for gas pressure welding.

A gas pressure welding method is widely known in which compressive pressure in the axial direction is applied to base materials to be joined and the joint portion is heated at a gas point.

The gas pressure welding method is a method in which the joint parts of the objects to be joined are locally heated using an oxygen or acetylene gas flame, and pressure is applied to join them.

When joining one pipe using a conventional gas pressure welding device,
The steel pipes to be joined are clamped by a stationary clamp fixed to the main body and a movable clamp that is slidable in the axial direction of the main body using a hydraulic cylinder cylinder. Apply pressure with the pressure button.

At this time, the ring burner is supported by a surface copying device attached to the steel pipe, and is swung in the axial and circumferential directions of the steel pipe by the swing device C2.

Oxygen, acetylene, and cooling water are supplied from the outside through a hose, and the oxygen and acetylene are mixed and adjusted using a gas regulator that includes a mixer, and then supplied to the ring burner through the hose.

By the way, in such gas pressure welding, the surfaces of the steel joints are heated to melt or almost melt, so sparks are generated from between the joints or 10,000 molten metal drips, which enters the nozzle hole of the ring burner. If hit, a backfire will occur.

For this reason, the explosive force may cause the molten metal at the joint to be blown away, the heated coal to disappear, and in some cases damage equipment such as gas hoses, resulting in pressure welding work or safety problems. There is.

As a result of our research into a burner that satisfies the aforementioned burner backfire prevention and the uniform heating of the base material required for gas pressure welding, we have proposed a burner built into an annular base in Japanese Patent Application No. 55-124071. An acetylene chamber and an oxygen chamber, each connected to the acetylene chamber, are provided concentrically on the nozzle axis, and the opening degrees of the valves of the acetylene chamber and oxygen chamber are variable to adjust the flow rates of acetylene and oxygen. Regarding the base, ring burners placed at equal intervals were set up on Tagawa.

The present invention further improves the structure of the ring burner described above! To provide a ring burner that is simple, lightweight, compact, and inexpensive.

In other words, the present invention provides nozzle body mounting holes at a desired pitch (two holes), an annular base having an oxygen and acetylene supply system, and an annular base having an oxygen and acetylene supply system, and is concentric with the nozzle axis (two oxygen and acetylene supply systems). A ring burner for gas pressure welding, characterized in that the nozzle body is provided with an acetylene chamber and has a built-in gas mixing chamber in the axial direction of the nozzle, and the nozzle body is oriented toward the center point of the annular base. It is related to.

The present invention will be explained below with reference to the drawings.

As shown in FIG. 1, the annular base 10 of the burner of the present invention has mounting holes 15-1, 15- for the nozzles 20 at a desired pitch.
2. Provide the necessary number of 15-n. As will be described later, the nozzle 2o is arranged in a 7'ff shape and directed toward the center of the I stand 10. Annular base 1° is oxygen and acetylene supply system 13
．． 14 and cooling water supply and drainage system 11-1.11-2
have. P indicates the steel pipe to be treated.

As understood from the cross-sectional view in FIG. 2 and the perspective view in FIG. 3, the nozzle 20 is composed of a nozzle body 22 and a tip 24, and the annular base 1a is formed by an annular base body 21 and a side plate 32. and screws 35-1, 35-2
The side plate 62 is fixed to the annular base main body 21 by this. The annular base main body 21 is provided with an oxygen flow rate adjustment knob 26 and an acetylene flow rate adjustment knob 27. The purpose is achieved by adjusting the gap between the needle 29 of the oxygen flow rate adjustment knob 26 and the inlet 28, but is not necessarily specified as shown. The acetylene flow rate adjustment has the same structure as the oxygen flow rate adjustment.

In other words, the purpose is achieved by fully adjusting the gap between the needle 31 of the acetylene flow rate adjustment knob 27 and the blowing port 30.

Said oxygen chamber 16-2. The acetylene chamber 14-2 is in communication with the oxygen and acetylene supply systems provided in the annular base 10, and is provided concentrically with the annular base main body 21.

The nozzle body 22 has a gas mixing chamber 26 that communicates with the crater 25.
is installed inside the nozzle 20 in the axial direction.

On the annular base 10 of the burner of the present invention, the above-mentioned nozzles 20 are arranged, for example, at equal pitches and directed toward the center of the annular base 1o.

FIG. 4 shows a cross-sectional view of another embodiment of the invention.

In the figure, the oxygen flow rate adjustment knob 26 and the acetylene flow rate adjustment knob 27 can be adjusted along the axial direction of the nozzle 20.

Further, the oxygen chamber 13-2 and the acetylene chamber 14-2 are provided concentrically on the annular base main body 21, and are connected to the oxygen and acetylene supply system (two connected to each other) provided on the annular base 10.

As described in detail above, the present invention provides an oxygen chamber, an acetylene chamber, and in some cases a cooling water chamber concentrically provided in the annular base body, and a nozzle having a mixing chamber is provided with holes penetrating radially at equal pitches equal to the number of nozzles. ! It was attached to the annular base provided.

Further, the flow rate adjustment of each gas is performed by a knob attached in the radial direction of the nozzle attached to the side surface of the burner as in the second factor, or by a knob attached in the axial direction of the nozzle as shown in FIG.

Therefore, since the nozzle is directly inserted into the shaft and attached, the structure is simplified, and the nozzle is lightweight, compact, and inexpensive.

[Brief explanation of drawings]

Figure 1 is a perspective view of the annular base of the burner of the present invention, Figure 2 is a sectional view of the burner of the present invention, Figure 3 is a perspective view of the main parts of the burner of the present invention, and Figure 4 is another embodiment of the present invention. FIG. 10; Annular base 11; Cooling water chamber 16; Oxygen group 14; Acetylene chamber 15; Nozzle mounting hole 20: Nozzle 2-6; Mixing chamber 24; Chip 25: Crater Figure 7/3 Z Figure 3 4 Pole 4. Amendment to Procedures (Voluntary) 1984 4 113 - Director General of the Japan Patent Office Shima 1) Indication of the Haruki Tono case 1982 Patent Application No. 164295 2 Title of the invention 3 Amendments to Ring Bar for Gas Pressure Welding Person involved in the case Relationship to the case Patent applicant Address 2-6-3 Otemachi, Chiyoda-ku, Tokyo Name (665) Representative of Nippon Steel Food Coloring Representative Takeshi FB Yutaka 4th generation Osamu Address Nihonbashi, Chuo-ku, Tokyo 3-3-3 No. 5 Date of amendment order Showa Year Month Day (shipment date) 6, Number of inventions increased by the amendment 7 Subject of amendment Column for detailed explanation of the invention in the specification + ti
lll 3rd line from the bottom of the first page, ``Gas point'' is ``Gas flame''
Changed to

Claims (1)

[Claims] Nozzle body mounting holes are provided at a desired pitch, and an annular base having an oxygen and acetylene supply system is connected to the oxygen and acetylene supply system, and an oxygen chamber and an acetylene chamber are provided concentrically to the nozzle axis. 1. A ring burner for gas pressure welding, characterized in that the nozzle body is disposed between the center point C'' of the annular base and between the fingers.