JPH0270337A - Bending device for fin and tube type heat exchanger - Google Patents

Abstract

PURPOSE:To obtain the bending device which can correspond to even the case in which a straight part is short by providing a rotation shaft for rotating a drum, a clamper for fixing a heat exchanger to the drum and a holding-up bar which is inserted into a tube of the heat exchanger. CONSTITUTION:A plate-like heat exchanger 3 is fixed to a straight surface 8 of a drum 1 by a clamper 4. Subsequently, a holding-up bar 6 is allowed to ascend from a position of a dotted line, and also, inserted into a tube 10. When the drum 1 is turned clockwise by 90 degrees, a circular arc part 9 is formed in the heat exchanger 3. At this time point, the holding-up bar 6 is drawn out of the tube 10. Thereafter, the drum 1 is turned counterclockwise by 90 degrees and returned to its origin. At this time point, the clamper 4 and the holding-up bar are allowed to descend to a position of a dotted line, and the heat exchanger 3 is taken out. In such a way, by providing the holding-up bar which can be inserted into the tube of the heat exchanger, even when the straight part is short, this device can correspond thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides an L-shaped fin-and-tube heat exchanger.
This invention relates to a bending device for a fin-and-tube heat exchanger used when bending it into a figure-eight shape or the like.

Conventional technology Conventional fin-and-tube heat exchanger bending equipment is
As shown in FIG. 4, a drum 1 having an arcuate surface 7 and a straight surface 8, a rotating shaft 2 for rotating the drum 1, a clamper 4 for fixing a fin-and-tube heat exchanger 3 to the drum 1, and a drum In order to align the fin-and-tube type heat exchanger 3 with the circular arc surface 7 of the drum 1 when the drum 1 rotates, the drum 1 includes a contact plate 11 that is placed against the fins 6.

The operation of the fin-and-tube heat exchanger device constructed as described above will be described below.

First, as shown in FIG. 4, a flat fin-and-tube heat exchanger 3 is fixed to the straight surface 8 of the drum 1 by a clamper 4, and its end portion is set on a contact plate 11. Figure 5 shows the drum 1 being rotated 90 degrees from the state shown in Figure 4.
It is shown rotated clockwise. In this state, the fin-and-tube heat exchanger 3 has a circular arc portion 9 formed therein. FIG. 6 shows a state in which the drum 1 has been rotated 90 degrees counterclockwise from the state shown in FIG. 5 and returned to its original state. At this point, the clamper 4 and the cover plate 11 are lowered to the dotted line position and the fin-and-tube heat exchanger 3 is taken out.

Problems to be Solved by the Invention However, in the above conventional configuration, since the fins 6 are held down by the cover plate 11, the fin-and-tube heat exchanger 3
When the length of the straight portion 12 of the fin 6 becomes short, the fin 6 becomes deformed.

The present invention solves the above-mentioned conventional problems, and aims to provide a bending device for a fin-and-tube heat exchanger in which the fins do not deform even when bending a fin-and-tube heat exchanger with a short straight section. do.

Means for Solving the Problems In order to achieve this object, the bending device for a fin-and-tube heat exchanger of the present invention has a rotating shaft for rotating a drum, a clamper for completely fixing the fin-and-tube heat exchanger to the drum, and a bending device for a fin-and-tube heat exchanger according to the present invention. It consists of a rod that is inserted into the tube of a fin-and-tube heat exchanger.

Function: With this configuration, the tube T, which is less deformable than the fins, is held down when bending, so when bending a fin-and-tube heat exchanger with a short straight section, the length of the rod that can be inserted into the naup can be reduced. Even if the length is short and limited,
Bending can be performed without problems with tube or fin deformation.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

The device of this embodiment shown in FIGS. 1 to 3 basically has the same configuration as the conventional device shown in FIGS. 4 to 6, so the same components are given the same numbers. A detailed explanation will be omitted. The difference from the conventional example is that, in place of the conventional abutment plate 11, a abutment rod 6 with an outer diameter that can be inserted snugly into the tube 10 is provided.

The operation of the bending device for a fin-and-chew type 7 heat exchanger configured as described above will be described below.

First, as shown in FIG.
-1- Fix to surface 8. Next, the abutment rod 6 is raised from the hemline position and further inserted into the tube 10. FIG. 2 shows a state in which the drum 1 has been rotated 90 degrees clockwise from the state shown in FIG.

In this state, the fin-and-tube heat exchanger 3 has a circular arc portion 9 formed therein. At this point, the rod 6 is tube 10
be surpassed. FIG. 3 shows a state in which the drum 1 has been rotated 90 degrees counterclockwise from the state shown in FIG. 2 and returned to its original state.

At this point, the clamper 4 and the stopper rod 6 are lowered to the dotted line position, and the fin-and-tube heat exchanger 3 is taken out.

Effects of the Invention As described above, the present invention provides an excellent fin-and-tube heat exchanger that can be used even when the straight section is short by providing a stopper rod that can be inserted into the tube of the fin-and-tube heat exchanger. This makes it possible to realize a dexterous bending device.

[Brief explanation of the drawing]

FIG. 1 is a top view showing the bending device for a fin-and-tube heat exchanger according to an embodiment of the present invention before bending, FIG. 2 is a top view of the drum rotated 90' from FIG. 1, and FIG. From Figure 2, the top view of the drum returned to its original state, Figure 4.
The figure is a top view of a conventional bending device for fin-and-tube heat exchangers before bending.
FIG. 6 is a top view of the drum rotated by 0 degrees, and FIG. 6 is a top view of the drum returned to its original state from FIG. 1...Drum, 2...D rotating shaft, 3
--Fin-and-tube heat exchanger, 4...
Clumber, 6...Tempo, 19...Tube.

Claims (1)

[Claims] A bending device for a fin-and-tube heat exchanger, which has a rotating shaft for rotating a drum, a clamper for fixing a fin-and-tube heat exchanger to the drum, and a rod for inserting into a tube of the fin-and-tube heat exchanger.