CN2145359Y

CN2145359Y - Pipe bundle of high-temp. air conditioner

Info

Publication number: CN2145359Y
Application number: CN 92234724
Authority: CN
Inventors: 周传易; 顾望平; 高延福; 王志坚; 王中英; 程薇
Original assignee: HARBIN AIR CONDITIONER PLANT
Current assignee: HARBIN AIR CONDITIONER PLANT
Priority date: 1992-09-29
Filing date: 1992-09-29
Publication date: 1993-11-03
Anticipated expiration: 2002-09-29

Abstract

The utility model discloses a pipe bundle for air-cooled heat exchangers. The existing pipe bundle for air-cooled heat exchangers adopts a multipass fixed pipe sheet type, so the existing pipe bundle can be easily damaged because of weak thermal expansion capacity when the medium temperature is high and the drift current is large. The utility model comprises an outer shell with inlet and outlet pipes, a pipe box fixed on the outer shell and finned pipes fixedly connected with the pipe box. The finned pipes are connected by a U-shaped pipe. The structure enables stress generated between pipes because of heating expansion to be eliminated with the free movement of the U-shaped pipe to reduce the stress between the pipe box and the outer shell. The pipe bundle for air-cooled heat exchangers has the advantages of small pipe box, good tightness, can be used for high temperature mediums in large range and can be used under the operating condition with large drift current.

Description

Pipe bundle of high-temp. air conditioner

The utility model relates to a kind of air cooler tube bundle, and particularly medium has high temperature, the air cooler tube bundle of bias current phenomenon.

Existing air cooler tube bundle adopts the multipass fixed tube sheet type more, be that each tube side links to each other by bobbin carriage, because often reaching 300 ℃～370 ℃ import and export temperature difference, the working media temperature of air cooler tube bundle can reach 250 ℃～270 ℃, and changes in flow rate is big, bias current is serious, has formed bigger pipe way differential expansion and the differential expansion between tube bank and the housing, makes that the pulling-out force of pipe way is widely different, pull bigger, the tube bank stress effect make housing and bobbin carriage junction also very easily the damage.

The purpose of this utility model is the pulling-out force of eliminating between the tube-to-tube sheet connection that thermal expansion brings, reduce to restrain and shell side between stress, a kind of multipass air cooler tube bundle is provided thus.

The purpose of this utility model is that the shell of realizing like this 1 of importing and exporting pipe that has is packed in bobbin carriage 2 on the shell, connects firmly with bobbin carriage, and cased finned tube 3 adopts 4 connections of U-shaped pipe between each tube side of finned tube.

Advantage of the present utility model is:

1, expands to the pulling-out force of tube sheet by the flexible fin tube heat of having eliminated of expanding naturally of U-shaped pipe.

2, since the overall bulge outward stress of tube bank reduce and the U-shaped pipe is made up the difference and is made that stress greatly lowers between bobbin carriage and shell body.

3, bobbin carriage is little, and sealing surface is little, is easy to processing, uses good airproof performance.

4, because secondary stress reduces, and it is simpler that structure becomes, cost is low, has than the great society economic benefit.

5, the easiest defective that causes by thermal expansion that makes that air cooler tube bundle damages that has overcome that multipass bobbin carriage air cooler tube bundle is had in the traditional design for many years.

Description of drawings:

Fig. 1 is the structural representation of air cooler tube bundle.

Fig. 2 is the connection diagram of U type pipe and finned tube.

Embodiment 1 comprises:

By having the shell 1 that passes in and out pipe, be packed in the one way bobbin carriage 2 on the shell, with the cased finned tube 3 that bobbin carriage is connected, between each tube side of finned tube, one one correspondence is linked up with U-shaped pipe 4.

Embodiment 2 is close with embodiment 1, and just bobbin carriage is the plug shape of rectangle.

Claims

1, a kind of high temperature air cooler tube bundle, its composition comprises: have the shell of importing and exporting pipe, be packed in the bobbin carriage on the shell, connect firmly with bobbin carriage, cased finned tube is characterized in that: adopt the U-shaped pipe to connect between each tube side of described finned tube.

2, high temperature air cooler tube bundle according to claim 1 is characterized in that: described bobbin carriage is the one way bobbin carriage of the threaded plug type of rectangle.