JPH0449470Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heating burner device used in iron plate bending work.

[Conventional technology]

Generally, the bending work of outer panels made of thick metal plates, such as steel plates used for ships, is performed by repeatedly heating the steel plate with a heating burner device and then cooling the heated part with water. It is being done.

FIG. 6 shows a conventional heating burner device used for such bending work, and in the figure, reference numeral 11 indicates a gas conduit having a flow hole formed therein.

Rubber hoses 13 and 15 for supplying oxygen and LPG (liquefied propane gas), for example, are connected to the rear end of the gas conduit 11 via connecting portions 17, respectively.

Further, the front part of the gas conduit 11 is slightly bent to form a bent part 19, and when a worker performs heating work, this bent part 19 is used for the outer panel of a ship, for example. It is formed to be approximately perpendicular to the metal plate 21 made of a steel plate.

At the tip of the bent portion 19 of the gas conduit 11, a crater 23 that spews flame toward the metal plate 21 is arranged.

In such a heating burner device 25, as shown in FIG. 7, in order to bend the metal plate 21 in accordance with the shape of the ship, the crater 23 is brought close to the corner 27 of the metal plate 21, and the crater 23 is moved to the corner. 27 as the starting point, the movement trajectory 29 as shown by the dashed line in FIG.
The metal plate 21 is heated by the flame ejected from the crater 23, and then cooled with water, thereby bending the metal plate 21 so that the heating surface (cooling surface) side becomes a concave surface. , metal plate 2
Perform the bending work in step 1. This kind of bending work
This process is repeated until the curved surface of the metal plate 21 has a radius of curvature that matches the shape of the ship.

That is, by heating the portion of the metal plate 21 to be bent and cooling the heated portion with water, the curved surface of the metal plate 21 can be bent to a predetermined radius of curvature.

[The problem that the idea aims to solve]

However, in such a conventional heating burner device 25, the metal plate 21 is
The bending part must be heated, and one crater 2
Since the heating area of 3 is small, as shown in FIG. 7, it is necessary to move the crater 23 from side to side many times with respect to the bent part to heat it, resulting in poor heating efficiency.
There was a problem that the work took a long time. especially,
If the radius of curvature of the bent part is large, the heating burner device 25 with one ignition port as shown in FIG. It was hot.

The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to provide a heating burner device that can significantly improve heating efficiency compared to the conventional one.

[Means to solve the problem]

A heating burner device according to the present invention is a heating burner device in which a gas conduit through which combustion gas flows is provided with a crater for ejecting flame toward a metal plate at the tip of the gas conduit, in which a bent portion is formed at the tip. a gas conduit formed by the gas conduit, and a central portion thereof connected to the tip of the bent portion of the gas conduit so as to communicate with the gas conduit and to make the axial direction of the gas conduit substantially perpendicular to the axial direction of the gas conduit. a fixed crater tube, a plurality of craters provided at regular intervals in the axial direction of the fixed crater tube so that their respective heating ranges overlap at the center thereof, and a gas pipe connected to the gas conduit via a bracket. It has wheels for movement provided therein.

[Effect]

In this invention, when the gas pipe is lifted up when heating a metal plate, the bent part becomes almost perpendicular to the metal plate, and the worker can move the gas pipe back and forth, creating a comfortable working posture. allows for easy heating work.

However, when a metal plate is heated with multiple craters,
The surface temperature of the metal plate located at the central crater portion is the highest, and the surface temperature of the metal plate located at the crater portions at both ends is the lowest.

When the heated portion is cooled with water, each portion of the heated portion can be given different degrees of shrinkage, and a smooth bend can be generated.

In addition, since the locus of the moving wheels coincides with the part of the metal plate where the surface temperature is highest due to the crater, by moving the moving wheels back and forth along the vicinity of the bent part of the metal plate, The vicinity of the bent portion can be reliably heated.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 to 3 show a heating burner device of the present invention, and in the figures, reference numeral 31 indicates a gas conduit having a flow hole formed therein.

This gas conduit 31 is made of a metal pipe with a diameter of 12 mm, for example, and the rear end of the gas conduit 31 has a
For example, rubber hoses 33 and 35 for supplying oxygen and LPG are connected via connecting portions 37, respectively.

Further, the front part of the gas conduit 31 is, for example, θ=
A bent part 39 is formed by bending at an angle of 120 to 125 degrees, and when a worker performs heating work on a metal plate 41 made of a steel plate used for the outer panel of a ship, for example, this folded part 39 is formed. The curved portion 39 is formed to be substantially perpendicular to the metal plate 41. The angle of this bent portion 39 is related to the length of the gas conduit 31 and the length of the bracket of the moving wheels, which will be described later.
The angle range is set as above.

A nozzle fixing tube 43 made of a pipe with a diameter of 15 mm, for example, is fixed to the tip of the bent portion 39 of the gas conduit 31. This crater fixed pipe 43
is fixed to the gas conduit 31 at its center so that its axial direction is substantially perpendicular to the axial direction of the gas conduit 31. This nozzle fixed pipe 43 and the gas conduit 31 are in communication, and both ends of the nozzle fixed pipe 43 are tightly plugged.

The fixed crater tube 43 has a plurality of craters 45, 47, 49, 51 along its axial direction that eject flames toward the metal plate 41 at a predetermined distance L ₁ , for example.
They are arranged at an interval of 80 mm and fixed at right angles, and the distance L ₂ between the nozzles 45 and 51 at both ends and both ends of the nozzle fixing tube 43 is, for example, 25 mm.
These craters 45, 47, 49, 51 are formed so as to emit flames at almost right angles to the metal plate 41, and the distance L ₁ between each crater 45, 47, 49, 51 is As shown by the dashed line in Figure 4,
The heating range 53, 55, 57, 59 of each crater 45, 47, 49, 51 is the crater 45, 47, 4
9 and 51 so as to overlap each other at the center. The gas conduit 31 mentioned above is the first
As shown in FIGS. 3 to 3, it is fixed to the crater fixing tube 43 at an intermediate portion between a pair of craters 47 and 49 located in the center.

Further, the above-mentioned crater fixed pipe 43 allows the combustion gas that has flowed into the crater fixed pipe 43 via the gas conduit 31 to
In order to uniformly eject from each crater 45, 47, 49, 51, the inner diameter becomes smaller toward both ends.

Further, a bracket 61 is attached to the gas conduit 31, oriented in the direction of flame ejection, and fixed by a stopper 62, and a wheel 63 is attached to the lower end of the bracket 61.
is fixed. A pair of metal moving wheels 65 are rotatably attached to both ends of the wheels 63, thereby allowing the heating burner device to move freely in the front and rear directions. The mounting position of the bracket 61 on the gas conduit 31 can be adjusted by means of a stopper 62 according to the physique of the operator.

The length of the bracket 61 is such that when heating the metal plate 41, each crater 4 is
The lengths are such that the tips of 5, 47, 49, and 51 can be maintained at a predetermined distance from the metal plate 41.

In the heating burner device configured as described above, first, each of the craters 45 to which oxygen and LPG are supplied,
ignited at 47, 49, and 51. Next, these craters 45, 47, 49, 51 and the metal plate 41 are maintained at a predetermined interval, and the central part of the crater fixing tube 43 is
It is located at a bent part 69 on the metal plate 41 as shown by the two-dot chain line in FIG. 5, and by moving the moving wheels 65 back and forth along the bent part 69, the vicinity of the bent part 69 is heated. . In particular, each crater 45,4
7, 49, 51 heating range 53, 55, 57, 5
9 are formed so that they overlap at the center, the surface temperature of the metal plate 41 located at the central craters 47 and 49 is the highest, and the surface temperature of the metal plate 41 located at the central craters 47 and 49 is the highest, and
The surface temperature of the metal plate 41 located at 5 and 51 is the lowest. That is, an appropriate temperature difference can be given to the heated portion of the metal plate 41.

Then, the metal plate 4 is cooled by cooling the vicinity of the bent portion 69 with water discharged from the water hose 70.
The metal plate 41 is bent into a concave shape on the heating surface (cooling surface) side, and the metal plate 41 is bent by repeating heating and cooling until the designed radius of curvature is obtained. In particular, as mentioned above, there is a difference in the surface temperature of the metal plate 41, so when that part is cooled, each part of the heated part shrinks to a different extent, making it possible to generate a smooth bend. .

Therefore, in the heating burner device configured as described above, the gas conduit 31 is connected to the tip of the gas conduit 31.
1 is arranged so that its axial direction is approximately perpendicular to the axial direction of the gas conduit 43, and the plurality of craters 45, 47, 49, 51 are
Since the fixed crater tubes 43 are provided at predetermined intervals in the axial direction, and the moving wheels 65 are provided on the gas conduit 31 via the brackets 61, the heating burner device can be simply moved back and forth, and the heating burner device can be moved all at once. The large area of the metal plate 41 is heated, and the vicinity of the bent portion 69 can be easily and quickly heated without having to move the crater back and forth many times as in the past, greatly improving heating efficiency than before. can do.

As a result, even when the distance of the bent portion 69 is long, the heating time of the metal plate 41 can be significantly reduced compared to the conventional method, and the problem of heating the bent portion 69 on one side while cooling the other side can be avoided. gone,
It can be reliably bent to the designed radius of curvature. Therefore, for example, outer plates with a relatively large radius of curvature, such as the bow side plate of a ship, a ship's side plate, or a forecastle outer plate, or outer plates with a large warp due to outward bending, can be bent more quickly and efficiently than before. . In other words, it is used when the heating wires are parallel, such as when an outer panel that has been roughly bent with a roll is baked from the back (convex side) and a part of the rolled part is stretched.
can be most effective.

Furthermore, since the moving wheels 65 are provided on the gas conduit 31 via the bracket 61 in the flame ejection direction, it is no longer necessary for the operator to move the heavy heating burner device back and forth while lifting it by hand.
The heating burner device can be easily moved in the front-rear direction with each crater 45, 47, 49, 51 and the metal plate 41 maintained at a constant interval, and the metal plate 41
The heating operation can be performed more easily than before.

In addition, in the above embodiment, the craters 45, 47, 49,
Although the example in which four 51 are provided in the crater fixed tube 43 has been described, the present invention is not limited to the above embodiment, and even if the crater fixed tube is provided with two, three, or five or more craters, Almost the same effects as in the above embodiment can be obtained.

Further, in the above embodiment, the metal moving wheels 6
5 is provided in the gas conduit 31, but the present invention is not limited to the above embodiment, and even if moving wheels made of resin rollers are provided in the gas conduit, almost the same effect as in the above embodiment is provided. A similar effect can be obtained.

Further, in the above embodiment, a case has been described in which the metal plate 41 made of steel plate used for the outer panel of a ship is bent, but the present invention is not limited to the above embodiment, and can be used for other than the outer panel of a ship. Alternatively, even if a metal plate other than a steel plate is used, substantially the same effect as in the above embodiment can be obtained.

[Effect of idea]

As described above, in the heating burner device of the present invention, a fixed crater pipe is connected to the gas pipe at the tip of the bent part of the gas pipe on which moving wheels are provided via a bracket, and the pipe is connected to its axis. Since the long direction is almost perpendicular to the axial direction of the gas pipe and the central part is connected, when the gas pipe is lifted up when heating a metal plate, the bent part will hold the metal plate almost at right angles. This allows the worker to easily carry out heating work in a comfortable working position.

In addition, since multiple craters are provided so that their respective heating ranges overlap at the center, the surface temperature of the metal plate located at the central crater is the highest, while the crater at both ends has the highest surface temperature. A temperature change is obtained such that the surface temperature of the metal plate located at be able to.

Furthermore, since the moving wheels are provided on the gas conduit via the bracket, the locus of the moving wheels coincides with the portion of the metal plate where the surface temperature is highest due to the crater. Therefore, by moving the moving wheels back and forth along the vicinity of the bent portion of the metal plate, the vicinity of the bent portion can be reliably heated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a heating burner device according to the present invention. FIG. 2 is a side view of FIG. 1. FIG. 3 is a view taken from the direction of FIG. 2. 4 is a plan view showing the heating range of the heating burner device of FIG. 1. FIG. FIG. 5 is an explanatory diagram showing a state in which a metal plate is bent using the heating burner device of FIG. 1. FIG. 6 is a side view showing a conventional heating burner device. FIG. 7 is an explanatory diagram showing a movement locus of the heating burner device for heating a metal plate using the heating burner device of FIG. 6. FIG. Explanation of symbols of main parts, 31... Gas pipe,
41... Metal plate, 43... Crater fixed tube, 45,4
7,49,51...crater, 61...bracket,
65...Movement wheels.

Claims (1)

[Scope of claim for utility model registration] At the tip of a gas pipe through which combustion gas flows,
In a heating burner device provided with a crater that spouts flame toward a metal plate, the gas conduit has a bent portion at its tip, and the tip of the bent portion of the gas conduit communicates with the gas conduit. At the same time, a fixed crater tube whose axial length direction is approximately perpendicular to the axial length direction of the gas conduit and which is connected at its center, and a heated crater tube, which is spaced at regular intervals in the axial direction of the fixed crater tube, are heated. 1. A heating burner device comprising: a plurality of fire pits provided so that their ranges overlap at the center; and moving wheels provided on the gas conduit via a bracket.