JP3009970U - Induction heating device for structures - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device for locally heating efficiently two adjacent surfaces of a structure. A flat plate-shaped first heating body 12 and a second heating body 13 each having an induction heating coil inside thereof are provided with a first side plate 16 and a second side so that their mounting positions in the longitudinal direction can be adjusted. A plate 17 is attached, both are rotatably connected by a pin 18, and the first heating body 12 and the second heating body 13 are pressed to desired positions on two adjacent surfaces of the structure to be heated to perform induction heating. It is configured to be capable of performing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure induction heating device capable of locally inductively heating two adjacent surfaces of a prismatic structure or the like. In this specification, the structure is not limited to a rigidly assembled structure, but includes a structure in which a plurality of plate members and the like are simply butted together for welding.

[0002]

[Prior art]

 Conventionally, in manufacturing a suspension bridge, a steel plate box-shaped structure 1 having a structure shown in FIGS. 5 and 6 has been used. In this structure 1, the left and right web members 3, the upper flange member 4, and the abutting positions 5 are groove-welded, and the lower flange member 2 and the left and right web members 3 are abutting-position 6 integrated by fillet welding. The right and left web members 3 are formed with protrusions 7 called gussets for fastening ropes and the like. Further, the lower flange material 2 projects slightly (about 30 mm) laterally from the surface of the left and right web materials 3.

When welding and assembling such a structure 1, when the material is high-strength steel, preheating near the welding position is required. Therefore, conventionally, for example, when welding a butt position 5 to be welded (hereinafter referred to as a welding line), an electric heater is arranged along the welding line 5 at the portions to be preheated on both sides thereof before the welding work. They were placed, and temporary welding and main welding work were performed while confirming the proper welding temperature with a tempir stick, a contact thermometer, etc.

[0004]

[Problems to be solved by the device]

 However, in such a conventional method, a required number of electric heaters must be arranged and heated along the welding line of the plate material to be welded, which requires a large number of electric heaters and increases the equipment cost and the work. There is a problem that it takes a lot of labor and time. Moreover, since a large area is heated at the same time, the amount of heat released is large, and not only the thermal efficiency is poor, but there are also the problems of raising the ambient temperature and deteriorating the working environment, and the problems of being easily burned during work. .

The present invention has been made in view of the above problems, and when welding a structure as shown in FIGS. 5 and 6, the two surfaces sandwiching the welding line are locally and efficiently in a short time. It is an object of the present invention to provide an induction heating device for a structure that can be heated well and that has good workability.

[0006]

[Means for Solving the Problems]

 The present invention, which has been made to solve the above problems, has a flat plate shape as a whole and a first heating body having an induction heating coil inside, and a flat plate shape as a whole, and an induction heating coil inside. A gist of an induction heating device for a structure, which includes a second heating body including a coil, and a hinge device that rotatably connects the first heating body and the second heating body about axes parallel to each other. And

Here, the hinge device includes a first side plate attached to an end surface of the first heating body so as to be positionally adjustable in a longitudinal direction of the end surface, and an end surface of the second heating body. And a second side plate attached to the end face so as to be positionally adjustable in the longitudinal direction, and a pin for rotatably connecting the first side plate and the second side plate. Is preferred.

It is preferable that the first side plate has a curved shape so as to form a recess between the mounting position of the pin and the mounting position of the first heating body.

Further, it is preferable to provide at least one of the first heating body and the second heating body with a temperature detecting means for detecting the temperature of the surface of the structure against which the first heating body or the second heating body is pressed. .

[0010]

[Action]

 The induction heating device of the present invention is capable of setting the first heating element and the second heating element at an arbitrary angle by the above-mentioned configuration, and pressing the first heating element against one surface of the structure to be heated, The body can be pressed against the other surface adjacent to the one surface, and in that state the induction heating coils of the first heating element and the second heating element are energized so that the two surfaces of the structure are It can be locally heated efficiently, and is suitable for preheating in the vicinity of the welding line on the two sides of the welding line in the welding process of the box-shaped structure as shown in FIGS. 5 and 6, for example. Can be used.

Here, the hinge device is attached to the end surface of the first heating body so that the position of the hinge device can be adjusted in the longitudinal direction of the end surface, and the end surface of the second heating body. In addition, a second side plate attached to the end face so as to be positionally adjustable in the longitudinal direction, and a pin for rotatably connecting the first side plate and the second side plate may be provided. By changing the positions of the first heating body and the second heating body with respect to the first side plate and the second side plate, the pressing positions of the first heating body and the second heating body against the structure can be adjusted. The desired position of the structure can be heated.

Further, when the first side plate is formed into a curved shape so as to form a recess between the mounting position of the pin and the mounting position of the first heating body, it is shown in FIGS. 5 and 6. In the structure, the first heating body and the second heating body can be pressed against the web material 3 and the lower flange material 2 arranged so that the ends thereof project from the surface, and the projecting portion It is possible to heat the two surfaces sandwiching the protruding portion of the structure having the shape.

Further, at least one of the first heating body and the second heating body is provided with a temperature detecting means for detecting the temperature of the surface of the structure against which the first heating body or the second heating body is pressed. The temperature of the surface to be heated can be measured at the time of heating, and it can be easily heated to the desired temperature.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a schematic perspective view of an induction heating apparatus according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of a second heating body of the induction heating apparatus, and 11 is the whole induction heating apparatus. 12 is a first heating body having a flat plate shape as a whole and having an induction heating coil inside, and 13 is a second heating body having a flat plate shape as a whole and having an induction heating coil 14 inside Is. The first heating body 12 and the second heating body 13 are each made of a non-conductive material such as fiberboard. It should be noted that the first heating body 12 and the second heating body 13 may be provided with vent holes if necessary, and may be provided with appropriate handles for easy handling such as movement. .

Reference numeral 15 is a hinge device that connects the first heating body 12 and the second heating body 13 rotatably about axes parallel to each other. The hinge device 15 includes a first side plate 16 attached to an end surface of the first heating body 12, a second side plate 17 attached to an end surface of the second heating body 13, a first side plate 16 and a second side plate 16. A pin 18 that rotatably connects the two side plates 17 is provided. A thread is formed at the tip of the pin 18, and a wing nut 19 is screwed into the thread. Therefore, by loosening the wing nut 19, the first side plate 16 and the second side plate 17 can be rotated around the pin 18, and by tightening the wing nut 19, the first side plate 16 can be rotated. The second side plate 17 can be fixed so as not to rotate.

A bolt 21 is fixed to the first heating body 12 so as to project from the end face thereof, and a wing nut 22 is attached to the tip thereof. On the other hand, the first side plate 16 that is pressed against the end face has an elongated hole 23 for passing the bolt 21. Therefore, the attachment position of the first side plate 16 to the first heating body 12 is the end thereof. It can be adjusted in the longitudinal direction of the surface. Similarly, the second heating element 13 is also provided with bolts 25 and butterfly nuts 26, the second side plate 17 is formed with an elongated hole 27, and the second side plate 17 is attached to the second heating element 13. The position can be adjusted in the longitudinal direction of the end face. The first side plate 16 is formed in a curved shape so as to form a recess 29 between the mounting position of the pin 18 and the mounting position of the first heating body 12.

Further, the first side plate 16 has elongated holes 31, 32 on both sides of the mounting position of the pin 18. The elongated holes 31 and 32 are for fixing the first side plate 16 to the second heating body 13 with the wing bolt 33. When this fixing is performed, the first side plate 16 and the second side plate 17 are Does not rotate about the pin 18, so that the first heating body 12 and the second heating body 13 can be firmly held at a certain angle. If the first side plate 16 and the second side plate 17 can be fixed so as not to move by only tightening the wing nut 19 attached to the pin 18, it is not necessary to use the wing bolt 33. The stays 34 are fixed and connected to the first side plates 16 attached to both ends of the first heating body 12.

On the upper surface of the first heating body 12, an operation box 35 for operating the energization of the induction heating coil 14 provided in the first heating body 12 and the second heating body 13 is attached. The operation box 35 has an operation switch 36 for manually connecting and disconnecting the power supply to the induction heating coil 14, and a temperature detecting means (not shown) for detecting the temperature of the surface of the structure against which the first heating body 12 is pressed. Equipped). As the temperature detecting means used here, known ones such as a radiation thermometer and a contact type thermometer can be appropriately used. The temperature detecting means may be provided not only on the first heating body 12 but also on the second heating body 13. A high frequency power supply 38 (see FIG. 3) is connected to the control box 35. The high frequency power source 38 is provided with a temperature controller (not shown) that controls the heating temperature based on the temperature signal measured by the temperature detecting means.

Next, by using the induction heating device 11 having the above-mentioned configuration, a box-shaped structure 1 (FIG. 3) including a lower flange member 2, left and right web members 3, and an upper flange member 4 (see FIG. 5, the same thing as shown in FIG. 6) is preheated for tack welding.

First, a case where the region between the web material 3 and the upper flange material 4 along the welding line 5 is preheated will be described. In this case, the wing bolt 33 is removed and the wing nut 19 at the tip of the pin 18 is loosened, and the first heating body 12 is pressed against the upper surface of the upper flange member 4 as shown in FIG. 4 (a). In addition, the angle between the first side plate 16 and the second side plate 17 is adjusted so that the second heating body 13 can be pressed against the side surface of the web material 3, and the wing nut 19 is tightened and fixed. Next, the wing nuts 22 and 26 are loosened to move the first heating body 12 and the second heating body 13 with respect to the first side plate 16 and the second side plate 17, and the first heating body 12 and the second heating body 12 are moved. The second heating element 13 is adjusted to an appropriate position with respect to the upper flange member 4 and the web member 3, and the wing nuts 22 and 26 are tightened and fixed. Further, the first side plate 16 is fixed to the second heating body 13 by the wing bolt 33, if necessary. On the other hand, the preheating temperature is set in advance on the temperature controller side of the high frequency power supply 38.

Next, as shown in FIGS. 3 and 4 (a), the induction heating device 11 adjusted in this way is arranged on both sides of the welding line 5 between the first heating body 12 and the second heating body 13. Set so that it can be pressed against the part of, and energize with the operation switch 36. As a result, the induction heating coil 14 built in the first heating body 12 and the second heating body 13 locally induction-heats the members facing each other and efficiently raises the temperature in a short time. . When the set preheating temperature is reached, it is detected by the temperature detecting means in the operation box 35, and the induction heating coil 14 is de-energized. Next, the operator shifts the induction heating device 11 in the state where the power is off to the next welding position, and turns on the heating again. Weld the parts that have completed preheating. Thereafter, by repeating this operation, the position to be welded can be rapidly and efficiently preheated one after another, and the welding can be performed immediately after the preheating.

In FIG. 3, when preheating and welding proceed along the welding line 5 to reach the position of the protrusion 7, the wing bolt 33 is removed and the wing nut 19 of the pin 18 is removed in FIGS. 1 and 2. Loosen and rotate the second side plate 17 and the second heating body 13 about the pin 18 by 180 °, and push the second heating body 13 against the inner surface of the protrusion 7 as shown in FIG. 4 (b). Adjust the angle so that it can be applied, and then tighten the wing nut 19 again to fix it. Then, the wing nuts 22 and 26 are loosened, the first heating body 12 and the second heating body 13 are adjusted to proper positions, and the wing nuts 22 and 26 are tightened and fixed again. Further, the wing bolt 33 is screwed in as necessary to fix the first side plate 16 to the side surface of the second heating body 13. The induction heating device 11 thus adjusted is set as shown in FIG. 4 (b), and the operation switch 36 is energized to preheat the portion facing the first heating body 12 and the second heating body 13 and perform welding. Preheat the area sandwiched by line 5. Then, when the set preheating temperature is reached, the temperature detecting means in the operation box 35 detects it, and the induction heating coil 14 is deenergized. Next, the worker shifts the induction heating device 11 in the deenergized state to the next welding position, turns on the heating again, and welds the preheated portion. Hereinafter, by repeating this operation, preheating and welding of the welding position along the protruding portion 7 are advanced. After passing through the protrusion 7, the induction heating apparatus 11 is returned to the state shown in FIG. 4 (a), and preheating and welding are performed in this state.

When performing fillet welding along the welding line 6 between the lower flange member 2 and the web member 3, as shown in FIG. 4C, the recess 29 of the first side plate 16 is By utilizing this, the protruding portion of the end portion of the lower flange member 2 is evaded and the first heating body 12 and the second heating body 13 are adjusted so as to be in proper positions. After that, the induction heating device 11 is set to the state shown in FIG. 4 (c), preheating is performed in the same manner as described above, and after preheating at a predetermined temperature, the induction heating device 11 is moved to the next position. The preheating process is repeated and the previously preheated part is welded. Thereby, fillet welding between the lower flange material 2 and the web material 3 can be performed quickly and efficiently.

As described above, when the induction heating device 11 according to the embodiment of the present invention is used, welding can be performed while preheating one after another along the welding line 5 or 6, and at that time, induction heating is performed. By using, it is possible to perform quick heating, and it is possible to shorten the setup time and greatly improve the thermal efficiency compared to the conventional case of preheating by arranging electric heaters side by side. It is possible to obtain effects such as less deterioration of the environment and less risk of burns.

The above description is for the case where the induction heating device 11 according to the embodiment of the present invention is used for preheating the structure 1 shown in FIG. 3. The induction heating device 11 is used for preheating for welding. Needless to say, it may be used not only for heating but also for heating in any other application. Further, the structure to be heated is not limited to the one shown in FIG. 3, and any structure is applicable, for example, it is also applicable to heating of two surfaces forming an angle other than a right angle.

[0026]

[Effect of device]

 As described above, the induction heating device of the present invention has a configuration in which the first heating body and the second heating body having the induction heating coil built therein are rotatably connected by the hinge device. The angle between the one heating element and the second heating element can be set to a desired value, so that even if two adjacent faces of the structure to be heated have different angles, the first heating The body and the second heating body can be pressed against two adjacent surfaces of the structure to locally induce induction heating. For example, when welding a structure as shown in FIG. It has the effect that the surface can be heated efficiently and with good workability.

Here, the hinge device is attached to the end surface of the first heating body so that the position of the hinge device can be adjusted in the longitudinal direction of the end surface, and the end surface of the second heating body. In addition, a second side plate attached to the end face so as to be positionally adjustable in the longitudinal direction, and a pin for rotatably connecting the first side plate and the second side plate may be provided. By adjusting the positions of the first heating body and the second heating body with respect to the first side plate and the second side plate, the pressing positions of the first heating body and the second heating body with respect to the structure are adjusted. Therefore, it is possible to obtain an effect that the desired position of the structure can be heated.

Further, when the first side plate is curved so as to form a recess between the mounting position of the pin and the mounting position of the first heating body, two surfaces to be heated are formed. Even if there is a protruding part in the corner between the two, the first heating body and the second heating body can be pressed against the two surfaces by avoiding the protruding part with the above-mentioned recesses, and the protruding part is The effect that the two surfaces sandwiching the projecting portion of the shaped structure can be heated well is obtained.

Further, at least one of the first heating body and the second heating body is provided with a temperature detecting means for detecting the temperature of the surface of the structure against which the first heating body or the second heating body is pressed. The effect of being able to measure the temperature of the surface to be heated during heating and easily heating to the desired temperature is obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an induction heating device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a second heating body of the induction heating device shown in FIG.

FIG. 3 is a schematic perspective view showing a state in which the induction heating device shown in FIG. 1 is set on a structure to be heated.

4 (a), (b) and (c) are schematic cross-sectional views showing a state in which the induction heating device shown in FIG. 1 is set in different parts of the structure shown in FIG.

FIG. 5 is a schematic perspective view showing an example of a structure to be heated.

6 is a schematic cross-sectional view of the structure shown in FIG.

[Explanation of symbols]

 1 Structure 2 Lower Flange Material 3 Web Material 4 Upper Flange Material 5, 6 Butt Position (Welding Line) 7 Projection 11 Induction Heating Device 12 First Heating Body 13 Second Heating Body 14 Induction Heating Coil 15 Hinge Device 16 First Side plate 17 Second side plate 18 Pins 19, 22, 26 Wing nut 21, 25 Bolt 23, 27 Long hole 29 Recess 33 Wing bolt 34 Stay

Claims (4)

[Scope of utility model registration request] 1. A first heating body having a flat plate shape as a whole and having an induction heating coil inside, and a second heating body having a flat plate shape as a whole and having an induction heating coil inside. An induction heating apparatus for a structure, comprising: a hinge device that rotatably connects the first heating body and the second heating body about axes parallel to each other. 2. A first heating body having a flat plate shape as a whole and having an induction heating coil inside, and a second heating body having a flat plate shape as a whole and having an induction heating coil inside. A hinge device that connects the first heating body and the second heating body so as to be rotatable about axes parallel to the first heating body and the second heating body. A first side plate attached to the longitudinal direction of the end face so as to be positionally adjustable; and a second side plate attached to the end face of the second heating body so as to be positionally adjustable to the longitudinal direction of the end face An induction heating device for a structure, comprising: a pin that rotatably connects the first side plate and the second side plate. 3. The first side plate has a curved shape so as to form a recess between the mounting position of the pin and the mounting position of the first heating body. Induction heating device for structures. 4. A temperature detecting means for detecting the temperature of the surface of the structure against which the first heating body or the second heating body is pressed, is provided on at least one of the first heating body and the second heating body. The induction heating device for a structure according to any one of claims 1 to 3, characterized in that.