CN2221200Y

CN2221200Y - Heat exchanging fin tube

Info

Publication number: CN2221200Y
Application number: CN 95207769
Authority: CN
Inventors: 范红兵
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-06
Filing date: 1995-04-06
Publication date: 1996-02-28
Anticipated expiration: 2005-04-06

Abstract

The utility model relates to a heat exchange fin tube, which is composed of a core tube and double helical fins which are welded on the core tube in the method of helical cold winding or vertical winding. The adoption of a U-shaped fin structure enables the bottom edges of the fins not easy to slip and change in the course of winding and operating. The cheap resistance welding, etc., can be adopted to weld. Because the contact area of the fin tube and the core tube is large and the heat resistance is small, the heat exchange efficiency is high. The utility model has the advantages of small equipment investment, high productive efficiency, simple structure and easy fabrication, and is an ideal heat exchange element.

Description

The heat-exchange fin pipe

The utility model relates to a kind of heat exchange element of heat-exchange apparatus, but a kind of heat-exchange fin pipe of boxing particularly.

Usually, the finned tube that on the core pipe, forms by the band spiral vertical winding that adopts in all kinds of heat-exchange apparatus, band and the ratio-frequency welding that is that adopts being connected of core pipe, this kind welds not only equipment needed thereby costliness, power consumption greatly, and speed of welding is also slower, because the finned tube band and the core pipe contact-making surface of this version are less, so heat exchanger effectiveness is lower.It is CN2144290Y that the utility model patent communique was once announced a kind of notification number, name is called the patent application of " high-efficiency fin screw thread heat-transfer pipe ", its fin design is the J type, the embedding of J type fin around and be welded in the screw-like U-lag of core pipe, though this structure can adopt cheap welding methods such as electric resistance welding, and the heat exchange effect is better, but this kind helix core tubular construction manufacturing process complexity, cost is also higher, because the fin wall is entad being defeated in huge distortion in the winding process, wall is glided be out of shape, be difficult to make.

The purpose of this utility model is to provide a kind of heat-exchange fin pipe, and not only heat exchanger effectiveness is higher for it, is easy to make, and can adopts cheap welding method, make its manufacturing process simple, feasible, and fin is not yielding.

Its concrete solution is: its fin adopts Qian type structure, and the base of fin and core pipe are fitted, and upright boxing connects or be cold on the core pipe, constitutes the double helix fin.Two stiles of Qian type fin can be designed to contour or not contour two kinds of forms, to satisfy the designing requirement of external heat-exchanging media flow resistance.

The utility model is simple in structure, be easy to make, owing to adopt Qian type structure fin, make that the fin base is difficult for sliding the change in coiling and use, and can adopt cheap electric resistance welding mode to weld, compare with former finned tube high frequency boxing technology, make its equipment investment can reduce half, and production efficiency is enhanced about more than once, again because the utility model finned tube and core pipe contact-making surface are bigger, thermal resistance is little, so heat exchanger effectiveness is higher, not only can adopt the connected mode of welding between this structural core pipe and the fin, also can directly adopt the connected mode of mechanical compaction that fin is cold on the core pipe.

In conjunction with the accompanying drawings the utility model is described in detail below by embodiment:

Fig. 1 is the utility model embodiment 1 structural representation.

Fig. 2 is the utility model embodiment 2 structural representations.

Embodiment 1:

What fin in the present embodiment (1) adopted is axial symmetry Qian type fin, and the Qian type bottom surface of fin (1) contacts with the tube wall of core pipe (2), spiral vertical winding and through the wheel electrode of resistance welder the bottom surface pressure bonding is connected on the core pipe (2) to the Qian type.

Embodiment 2:

Two stiles of the Qian type of fin in the present embodiment (3) are not contour, and fin (3) adopts the mode spiral of mechanical compaction cold on core pipe (2).

Claims

1, a kind of heat-exchange fin pipe is made of core pipe (2) and fin, it is characterized in that fin is the Qian type, and the base of fin and core pipe (2) fit, and upright boxing connects or be cold on core pipe (2), constitutes the double helix fin on the core pipe.