CN202747877U

CN202747877U - Double metal composite type fine copper fin pipe

Info

Publication number: CN202747877U
Application number: CN 201220420639
Authority: CN
Inventors: 孙峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-23
Filing date: 2012-08-23
Publication date: 2013-02-20
Anticipated expiration: 2022-08-23

Abstract

The utility model provides a double metal composite type fine copper fin pipe which comprises a base pipe and fine copper pipes, wherein the fine copper pipes are sleeved on the base pipe, a plurality of fins are arranged on the periphery of the fine copper pipes in rolling mode. When the double metal composite type fine copper fin pipe is arranged on a pipe sheet, a plurality of bumps are arranged on the outer wall of the end portion of the base pipe. A pipe plate hole is arranged on the pipe plate, and a plurality of ring-shaped grooves are arranged on the inner wall of the pipe plate hole. A chamfer of 1.5 x 45degrees is arranged on the outer edge of the left end of the pipe plate hole. The inner diameter of the left end of the pipe plate hole is greater of 0.2 millimeter than that of the right end of the pipe plate hole, the outer diameter of the base pipe is less than or equal to 30 millimeters, and the thickness of the pipe wall is less than or equal to 2 millimeters. The double metal composite type fine copper fin pipe is low in thermal contact resistance, capable of keeping stable low value in a large temperature change scope, high in coefficient of heat transfer, free of corrosion, good in resistance for temperature jump and vibration, large in area of heat transfer, high in capacity of heat transmission, reliable in structure, and long in service life.

Description

Double metal composite fine copper finned tube

Technical field

The utility model relates to air cooling, oil cooling field of heat exchangers, is specifically related to a kind of Double metal composite fine copper finned tube.

Background technology

The air cooling that uses in the traditional industry, oil cooling heat exchanger, mainly with wrap spring type, sheet assemble and around the heat exchanger tube of the types such as chip as heat exchange element, thermal contact resistance is large, heat exchange efficiency is low because existing for this type of heat exchanger tube, the outer surface defective such as easy cleaning not, and then progressively alternative by a kind of aluminum finned tube, but under identical working condition, because of the aluminium heat exchange efficiency of fins far below the fine copper fin, can't satisfy little because of the space, require the high requirement of heat exchange efficiency; Finned tube parent tube and tubesheet holes adopt traditional expanded joint encapsulating method in addition, and be limited because of bearing capacity, can't satisfy the requirement that high pressure need be born in expanded joint sealing position.

The utility model content

For above-mentioned finned tube and present defective and the deficiency that exists of expanding joint method thereof, the purpose of this utility model is to disclose a kind of Double metal composite fine copper finned tube.

The purpose of this utility model is achieved in that

A kind of Double metal composite fine copper finned tube comprises parent tube, pure copper tube, and pure copper tube is enclosed within on the parent tube, and rolling on the periphery of pure copper tube have a plurality of fins; Pure copper tube or replace with pure copper strips, pure copper strips closely is wrapped in and forms a plurality of fins on the parent tube; Parent tube is T2 copper tube, White Copper Tubes, titanium pipe or stainless steel tube.

The utility model also has like this some technical characterictics: when described Double metal composite fine copper finned tube, when being installed on the tube sheet, the end outer wall of parent tube is provided with a plurality of annular projections; Tube sheet is provided with tubesheet holes, and described tubesheet holes inwall is provided with a plurality of annular recess.The left end outer rim of tubesheet holes is provided with 1.5 * 45 ° of chamferings.The left end internal diameter of tubesheet holes is than the large 0.2mm of right-hand member internal diameter, and the external diameter of parent tube is less than or equal to 30mm, and pipe thickness is less than or equal to 2mm.

The beneficial effects of the utility model are:

Thermal contact resistance is low, can keep stable low value in larger range of temperature, and the coefficient of heat transfer is high, and parent tube is not corroded by outer finned tube protection, and temperature jump and vibration are had good drag; The unit length heat exchange area is large, and heat output is high, reliable in structure, long service life; Fin surface Glabrous thorn, corrugationless, less scaling, not yielding, be easy to clean, be easy to get rid of surface area water, flow resistance is low, can keep good heat transfer property for a long time;

And the fin of Double metal composite fine copper finned tube is fine copper, and heat exchange efficiency far exceeds aluminum finned tube, thereby satisfies, the Application standards such as heat exchange efficiency high, expanded joint sealing position bearing capacity height little in the space.

Description of drawings

Fig. 1 is tube plate structure schematic diagram described in the utility model;

Fig. 2 be Double metal composite fine copper finned tube described in the utility model and with the syndeton schematic diagram of tube sheet.

The specific embodiment

The utility model is described in further detail below in conjunction with Figure of description:

As shown in Figure 2, a kind of Double metal composite fine copper finned tube comprises parent tube 1, pure copper tube 2, and pure copper tube 2 is enclosed within on the parent tube 1, and rolling on the periphery of pure copper tube 2 have a plurality of fins 3; Pure copper tube 2 or replace with pure copper strips, pure copper strips closely is wrapped in and forms a plurality of fins 3 on the parent tube 1; Parent tube 1 is T2 copper tube, White Copper Tubes, titanium pipe or stainless steel tube.

As shown in Figure 1 and Figure 2, when described Double metal composite fine copper finned tube was installed on the tube sheet 4, tube sheet 4 was provided with tubesheet holes 5, and tubesheet holes 5 inwalls are provided with a plurality of annular recess 7.The left end outer rim of tubesheet holes 5 is provided with 1.5 * 45 ° of chamferings.The left end internal diameter of tubesheet holes 5 is than the large 0.2mm of right-hand member internal diameter, and the external diameter of parent tube 1 is less than or equal to 30mm, and pipe thickness is less than or equal to 2mm.

When being assembled to finned tube parent tube 1 on the tubesheet holes 5, parent tube tube wall 1 outwards expands under the expansive force effect, at left large and right small horn-like of tubesheet holes 5 interior formation, increases the adhesive strength of parent tube 1 and tubesheet holes 5;

The effect that the annular recess 7 that the inwall of each tubesheet holes 5 all has one or multi-channel spacing to equate, parent tube tube wall are subject to expansive force forms annular projection 6, can be protruding advances in the annular groove 7, further increases the adhesive strength of parent tube 1 and tubesheet holes 5;

Be provided with 1.5 * 45 ° of chamferings on the tubesheet holes 5 left end outer rims; Be subjected to the effect of expansive force behind the expanded joint of parent tube termination, meeting form horn-like in the chamfering position of tubesheet holes 5, thereby further increases the adhesive strength of parent tube 1 and tubesheet holes 5.

Prove by hydrostatic test, finned tube parent tube and tubesheet holes adopt above-mentioned expanded joint sealing, improve more than 50% than the bearing capacity that adopts traditional expanded joint sealing, the margin of safety of further raising equipment operation, within the unit interval, allow to improve simultaneously flow velocity and the flow of heat transferring medium, further improve the heat exchange efficiency of heat exchanger.

Claims

1. a Double metal composite fine copper finned tube comprises parent tube (1), pure copper tube (2), it is characterized in that: described pure copper tube (2) is enclosed within on the parent tube (1), and rolling on the periphery of pure copper tube (2) have a plurality of fins (3).

2. Double metal composite fine copper finned tube as claimed in claim 1 is characterized in that: described pure copper tube (2) or replace with pure copper strips, pure copper strips closely is wrapped in the upper a plurality of fins (3) that form of parent tube (1).

3. Double metal composite fine copper finned tube as claimed in claim 1, it is characterized in that: described parent tube (1) is T2 copper tube, White Copper Tubes, titanium pipe or stainless steel tube.

4. Double metal composite fine copper finned tube as claimed in claim 1, when being installed on tube sheet (4) when upper, it is characterized in that: tube sheet (4) is provided with tubesheet holes (5), and the end outer wall of parent tube (1) is provided with a plurality of annular projections (6).

5. Double metal composite fine copper finned tube as claimed in claim 4 is characterized in that: be provided with a plurality of annular recess (7) in the tubesheet holes (5).

6. Double metal composite fine copper finned tube as claimed in claim 4, it is characterized in that: the outer rim of the left end of tubesheet holes (5) is provided with 1.5 * 45 ° of chamferings.

7. Double metal composite fine copper finned tube as claimed in claim 4, it is characterized in that: the internal diameter of the left end of described tubesheet holes (5) is than the large 0.2mm of internal diameter of right-hand member, and the external diameter of parent tube (1) is less than or equal to 30mm, and pipe thickness is less than or equal to 2mm.