JPS5842436Y2 - Tube heating device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tube circumference heating device that can efficiently heat tube circumferences of various diameters.

Conventionally, various devices have been proposed to heat tubes with different diameters.One example is one that bends a cylindrical burner with an appropriate curvature and heats only the tube that matches that curvature, or one that heats only the tube that fits the curvature. Set up torch burners at appropriate intervals,
There are devices in which the steel pipe itself is bent to an appropriate curvature each time depending on the diameter of the object to be heated.
The former has the disadvantage that it can only be used for pipes with a certain diameter range, and beyond a certain diameter range, the curvature between the heated object and the burner becomes significantly difficult, and the difference between the burner flame and the heated object becomes large. Optimum spacing cannot be maintained, resulting in very poor thermal efficiency, and since the burner is long and slender, heating of the object to be heated in the longitudinal direction is performed only in a narrow range.

The latter is an improved version of the former so that it can be applied to pipes of various diameters, but with repeated use, the copper hardens and becomes difficult to bend, necessitating tempering. The drawback is that heating in the longitudinal direction can only be done in a narrow range.

As yet another example, several more links are sequentially connected to the left and right ends of the link provided in the center, and each link is opened and closed according to the diameter of the object to be heated, thereby creating an appropriate gap. There is also a device that heats the object to be heated using a torch attached to each link of the tube, but this is not practical because the structure of each link and its opening/closing mechanism are extremely complicated and require a large number of parts.

Therefore, the present invention eliminates the drawbacks of the conventional products mentioned above, and has a simple structure that allows pipes of various diameters to be heated with high thermal efficiency and to heat a wider range in the longitudinal direction of the pipe. The curvature of each burner installation base can be freely changed using a simple adjustment handle.

Next, embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a movable table, 2 a lower column erected at the center of the movable column 1, and 3 an upper column, in which a threaded portion 4 formed at the lower end can be inserted from the upper end of the lower column 2; The upper support 3 is raised and lowered by rotating the fastening fitting 5 screwed into the upper support 3.

6 is a fixed plate fixed to the upper end of the upper support 3 and has a rectangular cross section;
A front plate 7a and a rear plate 7b having an almost inverted triangular shape on both the front and rear sides.
are pivotally supported by pins 8, and burner installation arms 7c and 7c, which will be described later, are respectively fixed to their upper edges, and these front plate 7a, rear plate 7b, and installation arms 7c
, 7c constitute a base frame 7, which rotates together around the pin 8.

Numeral 9 denotes a plurality of elongated cylindrical burners installed on the upper surface of the installation arm 7C in the direction of the axis of the object to be heated a.
A suitable number of injection holes are opened on its upper surface.

10 is a handle for tilting the base frame 7, which is formed by further extending the lower part of the front plate 7a of the base frame 7.

Reference numeral 11 denotes a semicircular guide plate that hangs down from the fixed plate 6 on the back side of the tilting handle 10. A long arc-shaped hole 12 centered on the pin 8 is bored in this, and the long hole 12 and the tilting handle are connected to each other. By means of a tightening bolt 13 passing through the handle 10, the base frame 7 is tilted together along the elongated hole 12 with the pin 8 as an axis.

Reference numerals 14, 15, 16, and 17 all have links of the same structure, and the burner installation arm 19 is placed on each of the two link pieces 18 that are arranged oppositely in accordance with the distance between the front plate 7a and the rear plate 7b. The installation arm 7 of the base frame 7 is fixedly installed on the upper surface of the installation arm 19.
Similarly to C, a plurality of longitudinal burners 9 are arranged side by side in the direction of the axis of the object to be heated a.

Links 14 and 15 are connected by pin 20 and link 16
and 17 are rotatably connected to one end by a pin 21, and the other ends of the link 14 and 16 are connected by a pin 22 and a pin 23 respectively on the left and right sides of the upper edge of the base frame 7. Connect rotatably.

24 and 25 are arms, the upper ends of which are rotatably connected to the base frame 7 by pins 26 and 27 at positions further shifted toward the left and right outer ends than the pins 22 and 23, respectively; The distal end portions of support rods 28.29 protruding from the middle of each arm 24.25 are rotatably connected to the distal end portions of the links 15 and 17 by pins 30.31, respectively.

Furthermore, the lower ends of the arms 24, 25 are screwed into respective threaded parts of a screw punch 32 for adjusting the degree of opening and closing of the link, which has threads in opposite directions from the center to the left and right.

33 is a handle for rotating the screw punch 32.

In this embodiment, the number of links 14 to 17 is four, but this number may be further increased if necessary.

When carrying out the present invention configured as described above, first, the clamping fitting 5 is rotated according to the height of the bottom of the outer periphery of the object to be heated, so that the burner 9 on the base frame 7 is properly aligned with the object to be heated. Determine the height by moving the upper support 3 up and down to maintain a certain distance, then rotate the screw punch 32 with the handle 33 and move the lower end of each arm 24, 25 in the left and right directions. Support rods 28, 2 protruding from each arm 24, 25
9 gradually rises, and each link 14, 15, 16, 17 connected thereto is bent into a substantially arc shape along the outer periphery of the object to be heated a, and each burner 9 installed on each link is bent. The rotation of the handle 33 is stopped when a suitable distance from the outer periphery of the heated object a is maintained.

Next, each burner 9 is ignited and the flame heats the object a over a wide range depending on the length of the burner 9.

In addition, if this device cannot be installed directly below the object to be heated due to the position of the object to be heated, the base frame 7 can be tilted using the tilting handle 10 to align the links 14 to 17 along the circumference of the object to be heated. Can be done.

In the configuration shown in this embodiment, the object to be heated a can be heated from a tube with a diameter of 1 m to a flat plate, but if the entire object is made small, it can also be applied to a tube with a diameter of 1 m or less. .

In addition, the burner flame is controlled by the control device as high or low, and when the surface temperature detector detects overheating of the heated object, it switches to the low combustion state, and when the temperature drops too much, it switches to the high combustion state, and automatically switches to the low combustion state. The degree of heating can be adjusted.

As explained above, the present invention has a simple structure that allows the burner flame to be maintained at an optimal distance from the object to be heated by freely changing the curvature for pipes of various diameters, and therefore has very high thermal efficiency. The heating time is shortened, which saves fuel, and the burner is made long so that the object to be heated is heated over a wide area in the longitudinal direction, resulting in good welding effects.The movable table is movable, which greatly improves work efficiency. Furthermore, the installation of a simple tilting device makes it easy to select the installation position of this device depending on the position of the object to be heated, and the link opening/closing device allows it to be used in a wide range of applications, including all types of tubular objects, circular objects, and flat plates. This is an effective idea for labor saving.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a side view of the base frame portion. a...Object to be heated, 1...Moving table, 2.
...Lower support, 3...Upper support, 4...
...Thread part, 5...Tightening fitting, 6...
... Fixed plate, 7 ... Base frame, 7a ... Front plate, 7b ... Rear plate, 7C ... Installation arm,
8...pin, 9...burner 10...
...Tilt bundle, 11...Guidance plate, 1
2... Long hole, 13... Tightening bolt, 1
4, 15, 16. 17... Link, 18...
... Link piece, 19 ... Installation arm, 20, 21
．． 22.23...Pin, 24.25...
・Arm, 26, 27...Pin, 28, 29・
...branch, 30.31...pin, 32.
...screw pestle, 33...bundle.

Claims (1)

[Scope of utility model registration request] The upper column inserted into the lower column erected on the movable platform is supported so as to be able to rise and fall freely using a tightening metal fitting, and the base frame is suspended from the fixed plate fixed to the upper end of this upper column. The guide plate is guided through a long hole in the guide plate and rotatably supported, one end of each of the left and right links, which are separately connected, is rotatably connected to both sides of the upper edge of the base frame, and , at a position where the upper end is further deviated outward from the connection position of each link on both sides of the base frame, a support rod is provided to protrude from the middle of each arm on both sides which is pivotally supported on this base frame. The tips of the supporting rods are rotatably connected to the ends of the links on both sides, and the lower ends of the arms on both sides are connected to the respective threaded parts of screw punches that are threaded in opposite directions from the center. The screws are screwed together so that each link is bent along the outer periphery of the workpiece by rotation of the screw punch, and the axis of the workpiece is bent on the installation arm fixed on the base frame and each link. A tube circumferential heating device characterized by having a plurality of longitudinal burners arranged in parallel, each facing in the direction of.