JPS6042306Y2 - Partition device for spiral fin tube heat exchanger - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heat exchanger using a spiral fin tube as a heat transfer tube, and particularly relates to a partition device that prevents fluid flowing through the fin portion of the spiral fin tube from diffusing in the axial direction of the tube. .

Conventionally, when partitioning this type of spiral fin tube, longitudinal partition plates installed parallel to the heat transfer tube axis can be installed relatively easily, but partition plates installed perpendicular to the conduction tube axis are difficult to install due to the presence of spiral fins. I was having trouble arranging it.

Therefore, the inventors of the present invention disclosed in Japanese Patent Application Laid-open No. 53-8858 that it is possible to easily install spiral fin tubes without hindering mass production.
Moreover, we proposed a partition plate that is easy to design and can further reduce costs.

This partition plate has a notch between the pitches of the spiral fins, and has multiple partition plates formed with the same width as the fin outer diameter so that the notches face each other from the notch side. By inserting it, the circulation of fluid in the axial direction of the spiral fin is regulated.

However, after arranging these spiral fin tubes in parallel with intervals, and inserting a partition plate with the same width as the outer diameter of the spiral fins between the fin pitches at the same position on each spiral fin tube, the fins cover the outer periphery of the tubes. As the fin moves in the axial direction while turning, the vertical surface of the fin becomes a complicated curved surface, so in order to match the surface of the partition plate that contacts the fin with the curved surface of the fin, the surface of the fin should be aligned with the partition plate. It must be made into a complex shape to fit the vertical plane.

Moreover, one side edge of the partition plate and the other side edge are inclined in the tube axis direction according to the lead of the fin.
As a result, when looking at the partition plates from the side of the spiral fin, the end faces of the side edges are arranged alternately in the axial direction of the spiral fin. In order to match, problems remain, such as the need to devise the shape of the side end face of the notch.

The present invention was developed based on these problems, and can be easily installed without interfering with mass production of spiral fin tubes, is easy to design, and can reduce costs. Furthermore, it is an object of the present invention to provide a partitioning device that solves the above-mentioned problems and effectively utilizes the characteristics of the spiral fin tube.

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

FIG. 1 is a perspective view showing the basic structure of the present invention. In this figure, the outer circumference 4 of the spiral fin 3 of the spiral fin tube 2, which is a heat transfer tube, is fitted into the radial partition plate 1. A large diameter hole 5 is bored.

The thickness t of this radial partition plate 1 is the thickness of the spiral fin 3.
Therefore, the outer periphery of the spiral fin 3 for one pitch (the hatched part on the outer end surface of the fin) comes into contact with the inner surface of the hole 5 of the radial partition plate 1. Become.

As a result, the fin side wall 6 of the spiral fin 3 passing through point A, passing through point B, and ending at point 0 closes the hole 5 of the radial partition plate 1.

However, as it is, the turning groove 7 of the spiral fin 3 will communicate the front side and the back side of the radial partition plate 1, so that the outer circumference of the spiral fin 3 corresponding to one pitch of the turning groove 7 will be connected to the radial partition plate 1. A piece-like piece 8 having a short dimension in the circumferential direction of the fin is provided in the turning groove 7 extending over the inner circumferential surface of the hole 5 of No. 1 to close the turning groove 7.

Therefore, this piece-like piece 8 and the side wall 6 of the spiral fin 3 can perform the same role as the radial partition plate 1, and can also lean the spiral fin tube 2 in the tube axis direction.

FIGS. 2 to 5 show embodiments to which the basic configuration of the present invention described above is applied.

To explain these, first, Figs. 2 and 3 show a part of the spiral fin tube 2 arranged in parallel with an interval in the vertical direction, and Fig. 3 shows a part of the spiral fin tube 2 when viewed from the opposite direction to Fig. 2. FIG.

In FIGS. 2 and 3, the outer periphery of the spiral fin 3 between DE and F-6 is in contact with the inner surface of the wave-shaped longitudinal partition plates 9, 9, and between E-F Between and G-D
The gap is in contact with the vertical partition plate 10.10.

A piece-like piece 8a is interposed in the turning groove 7 of the spiral fin 3 whose outer periphery is closed for at least one turn to close the inside of the turning groove 7.

Since this piece-like piece 8a is formed integrally with the vertical partition plate 10, the position of the piece-like piece 8a is stabilized.

Thus, in this embodiment, the longitudinal partition plates 9, 9 and the vertical partition plate 10 are similar to the radial partition plate 1 in FIG.
It also serves as a partition plate equivalent to .

4A, B, and C are a front view, a side view, and a plan view showing another embodiment.

In this embodiment, as in the embodiments shown in FIGS. 2 and 3, the areas between H-J and -L on the outer periphery of the spiral fin tube 2 are connected to the inner surfaces of the corrugated longitudinal partition plates 9 and 9. are in contact,
A gap partition plate 11 serving as both a vertical partition plate and a piece-like piece is in contact with the space between J- and L-H.

Therefore, the longitudinal partition plates 9, 9 and the gap partition plates 11, 1
1 also serves as a partition plate corresponding to the radial partition plate 1 of FIG. 1, and the gap partition plate 11 also serves as a piece-like piece, so that the number of parts can be reduced.

The other embodiment shown in FIG. 5 is almost the same as the embodiment shown in FIG. It is also used as.

In this way, in the present invention, the outer periphery of the spiral fin is blocked by one pitch or more, and the turning groove of the spiral fin that has been blocked for at least one turn is partially filled with a piece-like piece having a short dimension in the fin outer circumferential direction. I did it like this,
Not only is the processing of the piece-like piece extremely simple, but its design is also extremely easy.

Furthermore, the partitioning device of the present invention can be easily installed without interfering with mass production of spiral fin tubes, and has the effect of lowering costs.

Furthermore, if the present invention is configured as in the first embodiment, the spiral fin tubes can be easily inserted and removed without being obstructed by the partition plate when replacing individual spiral fin tubes. It has the following effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing the basic configuration of the present invention, and FIGS. 2 to 5 are examples in which the basic configuration of FIG. 1 is applied. The figure is a perspective view of the same, Figure 3 is a perspective view of the back side of Figure 2, Figure 4A is a front view showing another application example, Figure 4B is a side view of the same, Figure 4C
5 is a plan view thereof, and FIG. 5 is a perspective view showing still another example of application. 1... Radial partition plate, 2...; Spiral fin tube, 3... Spiral fin, 8゜8a... Piece-like piece, 9... ...Longitudinal partition plate, 10...Vertical partition plate, 11゜11a...Gap partition plate.

Claims (1)

[Scope of utility model registration request] A heat exchanger in which a spiral fin tube 2 provided with continuous spiral fins 3 is used as a heat transfer tube, and the axial length of the spiral fin tube 2 is partitioned to form a fluid passage that circulates through the spiral fin 3 portion of the heat transfer tube. a spiral fin 3 of the spiral fin tube 2;
A plurality of wave-shaped longitudinal partition plates 9 are provided on the outer peripheral surface of the spiral fin tube 2 to cover the spiral fin tube 2 in the longitudinal direction. A vertical partition plate 10 is provided to close the above, and this vertical partition plate 10 is engaged with the turning groove 7 of the spiral fin tube 2,
and a piece-like piece 8 that partially closes one pitch of the turning groove 7;
A partitioning device for a spiral fin tube heat exchanger, characterized in that 8a is integrally provided.