JPS597887A - Production of meandering pipe type heat-transmitting pipe - Google Patents

Abstract

PURPOSE:To facilitate assembly, by a method wherein a heat-transmitting pipe is constructed in the form of a meandering manner including bent pipe parts, and is upported by a metallic support obtained by providing a circular notches at both side edges of a steel plate. CONSTITUTION:The heat-transmitting pipe 3 is constructed in the form of the meandering pipe including the bent pipe parts 6. The metallic supports 2 each of which is obtained by providing semicircuilar notches 7 for supporting the heat-transmitting pipes at both side edges of a steel plate and the heat-transmitting pipes 3 are alternately placed so that corresponding pairs of the semicircular notches 7 are complementally mated to each other to form circular passing holes, whereby the pipe 3 are clamped by the supports 2 through the circular holes. A block of the pipes 3 and the supports 2 thus assembled is jointed to headers 1 to complete the entire body of the heat-transmitting pipe. Accordingly, assembling of the heat-transmitting pipe or the like is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a 'dS tubular heat exchanger tube.

Conventionally, the serpentine heat exchanger tube of a boiler or heat exchanger is
As shown in Figures (A) and (B), it was supported by a tube plate with holes drilled in the steel plate for the heat exchanger tubes to pass through.

That is, heat exchanger tubes (3) arranged in a meandering manner connecting the inlet and outlet headers (1) are supported by a tube plate (2) having holes (4) through which the heat exchanger tubes pass.

In the method for manufacturing heat exchanger tubes using the support method, multiple rows of heat exchanger tube through holes (4) are simultaneously formed in the tube sheet (2), and then the straight pipe portions (5) of the heat exchanger tubes (3) are formed in the through holes (4). ) can be inserted and assembled. The assembled heat growth tubes (3) are spread by a tube expansion device so that the outside diameter of the heat growth tubes becomes larger than the inside diameter of the through holes (4) in the tube sheet (27), and the tube sheets (2) and heat transfer tubes (3) are
is fixed. Then, the curved pipe part (6) is grooved and welded to both ends of the straight pipe part (5) of the heat exchanger tube (3), and then the heat exchanger tube (3) and the tube plate (2+ block) are joined to the header. It was something to do.

For this reason, it is necessary to repeat the process of inserting the heat conductor, aligning the grooves, and welding, which differ in content and job type. Furthermore, if the precision of the through holes in the tube plate or the bent pipe is poor, it is difficult to align the grooves of the straight pipe section and the bent pipe section. Further, due to the above-mentioned reasons, there is a drawback that it takes time to assemble.

The present invention solves the above-mentioned conventional drawbacks, and the heat exchanger tubes, including the bent tubes, are assembled in advance into a serpentine tube shape, and support metal fittings are provided in which semicircular notches for supporting the heat exchanger tubes are formed on both sides of the steel plate. forming a heat exchanger tube, and sequentially overlapping the support metal parts so as to complement the semicircular notch of the support metal part to form a circular through hole for supporting the heat exchanger tube, and sandwiching the heat exchanger tube in the circular through hole. It is something to do.

The present invention is widely applicable to boilers and heat exchangers.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3. In FIG. 2, the heat exchanger tube (3) including the bent tube portion (6) is assembled in advance into a serpentine tube shape.

Then, on both sides of the copper strip, semicircular notches for supporting heat exchanger tubes (support metal fittings (2) that formed a force and the heat exchanger tubes (3) are arranged alternately, Circular through holes are formed, heat exchanger tubes (3) are arranged alternately, and the heat exchanger tubes (3) are held between the support metal fittings (2) by the circular through holes.

At this time, the supporting hardware (2) is as shown in Figure 3(A).
They may be arranged on the same plane, or if you want to increase the strength of the supports, you can partially overlap them or weld them between them, as shown in Figure 3 (B). good.

The blocks of the heat exchanger tube (3) and supporting hardware (2) assembled as described above are joined to the header (1) to complete the entire heat exchanger tube.

By manufacturing the heat transfer tube as described above, the following effects are achieved.

(1) By assembling the heat exchanger tubes in advance into a serpentine tube shape, the assembly of the heat exchanger tubes themselves becomes easier.

(2) Assembling the supporting metal fittings and the Hannetsu tube can be easily done by simply arranging them alternately.

(3) The above (IL) (2) can reduce the time required for assembly.

[Brief explanation of the drawing]

FIG. 1(A) is a partial perspective view of a conventional serpentine heat exchanger tube. Figure 1 (B) is a side view taken along arrow A-A in Figure 1 (A), and
The figure is a partial perspective view of the serpentine heat exchanger tube of the present invention, and Figure 3 (A) shows an example in which supporting metal fittings are arranged on the same plane.
) Figure 3 (A2) is a partial side view of the same, Figure 3 (A2) is a partial front view of the same, Figure 3 (B) shows an example in which supporting hardware is overlapped, and Figure 3 (Bl) is a partial side view of the same, Figure 3 (Bl) is a partial side view of the same, and Figure 3 (Bl) is a partial side view of the same. Figure 3 (B2) is a partial front view thereof. 1. Header, 2. Tube sheet, 3. Heat exchanger tube, 4. Through hole, 5. Straight pipe section, 6. Bent pipe section, 7. Semicircular notch section.

Claims (1)

[Claims] (1) Assemble the heat exchanger tube in advance into a serpentine tube shape, including the bent tube part, form a support metal fitting with semicircular notches for supporting the heat exchanger tube formed on both sides of the copper strip, and cut out the semicircular notch of the support metal piece. so that they complement each other to form a circular through hole for supporting the recuperation tube.
A method for manufacturing a serpentine heat exchanger tube, characterized in that the support hardware is successively clamped from both sides of the heat exchanger tube, and then the heat tube and the block of support hardware are joined to the header.