CN103115516A

CN103115516A - Integral spiral finned tube

Info

Publication number: CN103115516A
Application number: CN2011103632758A
Authority: CN
Inventors: 虞少芳
Original assignee: JIANGSU DAZIRAN ELECTRICAL APPLIANCE SIGN FACTORY
Current assignee: JIANGSU DAZIRAN ELECTRICAL APPLIANCE SIGN FACTORY
Priority date: 2011-11-16
Filing date: 2011-11-16
Publication date: 2013-05-22

Abstract

An integral spiral finned tube is composed of an outer spiral fin, a tube wall and an inner spiral fin. A forward acting spiral finned tube or a reverse acting screw finned tube can be adopted for the outer spiral fin and the inner spiral fin as required. The outer wall of a header is a fin formed by a spiral groove, and an integral finned tube structure is formed. Due to the integrally formed structure, the problem that heat cannot be exchanged quickly and efficiently in industrial heat exchange equipment is solved, heat exchange coefficient can be prevented from being decreased sharply when a small working medium flow rate is provided, and the problem that heat exchange coefficient is decreased sharply during heat exchange process is solved.

Description

Whole shape spiral fin coil

Technical field

The present invention relates to a kind of fin pipe fitting, specifically a kind of monolithic devices internal and external screw shape finned tube.

Background technology

In the supporting various heat transmission equipments of the industries such as metallurgy, motility, petrochemical industry, nuclear industry, in tubular evaparator, distiller, power station nuclear reactor and other forced-convection boiling heat exchanger, all exist this heat to change operating mode---in the boiling heat transfer process, when heat flow density is higher, gaseous state boiling heat transfer process in pipeline changes film boiling into, thereby make the coefficient of heat transfer sharply descend, and tube wall can occur when the liquid film evaporate to dryness on pipe directly contact and make another sharply decline of the coefficient of heat transfer with steam.For sharply the descend generation of phenomenon of the coefficient of heat transfer that prevents from existing in above-mentioned heat transfer process, prior art adopts and keep higher refrigerant flow rate in evaporation tube, but so makes not only the water resistance of whole equipment and the electric consumption but also the increase of feed pump.

Summary of the invention

Exchange heat is slow in order to solve in existing industrial heat exchange equipment, equipment is with the large problem of the electric consumption, the invention provides a kind of heat and gather exchange component, can be in the situation that operating power be extremely low, complete the problem that in industrial exchange heat equipment, heat can not efficiently exchange fast, and provide the refrigerant flow rate that need not keep higher can prevent that the coefficient of heat transfer from sharply descending, the problem that the coefficient of heat transfer that the solution heat transfer process exists sharply descends.

The technical solution adopted for the present invention to solve the technical problems is: the monolithic devices spiral fin coil, consisted of by outer spiral fin, tube wall, inner spiral fin, and inside spin and external spiral can adopt forward or reverse acting spiral finned tube as required.

The outer wall of its female pipe of the present invention is the fin that helical groove consists of, form the integral fins tubular construction, because it is integrated, namely be transitioned into finished product by the Bear-grudge pipe by the milling train Direct Rolling, there is no thermal contact resistance, the fin relaxation can not occur, the rib surfacing is smooth, the generation of the phenomenon such as thoroughly eliminated the knot that the space thermal resistance is folding because of the rib table and concavo-convex phenomenon causes ash, stifled ash, sealing-off between disome, break.

The present invention is monolithic devices internal and external screw finned tube.

The invention has the beneficial effects as follows, due to the finned tube of spiral all being arranged inside and outside this pipe fitting, by wing shape expansion heat exchanger tube inside and outside wall area enhanced heat exchange, to improve the heat exchange amount between fluid and wall, and make fluid that contrary sense rotation occur in the process of circulation, thereby strengthened heat exchange, thermal resistance is little, improved the coefficient of heat transfer and long service life.

Description of drawings

Fig. 1 is schematic diagram of the present invention;

1 outer spiral fin .2. tube wall 3. inner spiral fin 4. hot gaseous fluid 5. liquid heat fluids in figure

6. reverse direction of heat flow 8. gaseous state eddy current inner rings of forward direction of heat flow 7.

The specific embodiment

In Fig. 1, the present invention with the heat exchange amount between raising fluid and wall, and makes fluid that contrary sense rotation occur in the process of circulation, thereby has strengthened heat exchange by wing shape expansion heat exchanger tube inside and outside wall area enhanced heat exchange, has improved the coefficient of heat transfer.

In Fig. 1, outer spiral fin pipe (1) is used for heat radiation, and air-cooled or vertically heat exchange of water-cooled can add the forced heat radiation process time.when fluid rotates according to forward direction of heat flow (6) or reverse direction of heat flow 7, under the effect of inner spiral fin hot-fluid, hot liquid fluid (5) will be separated to tube wall (2), the gaseous state eddy current inner ring (8) that hot gaseous fluid (4) concentrates liquid to form is inner, thereby avoided in the boiling heat transfer process, when heat flow density is higher, gaseous state boiling heat transfer process in pipeline changes film boiling into and has avoided tube wall (2) directly contact and cause the coefficient of heat transfer sharply to descend with hot gaseous fluid (4), thereby also just strengthened heat exchange, improved the coefficient of heat transfer.

Simultaneously, the method that employing is passed through fluid rotary, can eliminate that the density difference causes occurs having between lower wall surface the temperature difference that on the horizontal tube that larger temperature difference phenomenon causes, lower wall surface exists in uneven pipeline owing to being subjected to exist in hot working fluid, thereby also just further strengthened heat exchange, improved the coefficient of heat transfer.

The spiral fin coil range of choice is large, can be in different operating modes match selection, reduce fluid resistance and come augmentation of heat transfer, improve effect.

Utilize milling train disposablely to process.

The size range of design processing internal and external screw finned tube (unit: mm):

In design is used, can reasonably select inside and outside wing shape to come Proper Match to optimize according to working condition supporting.

Claims

1. whole shape spiral fin coil, be made of outer spiral fin, tube wall, inner spiral fin, it is characterized in that: inside spin and external spiral can adopt forward or reverse acting spiral finned tube as required.

2. whole shape spiral fin coil according to claim 1, it is characterized in that: the outer wall of its female pipe is the fin that helical groove consists of, form the integral fins tubular construction, because it is integrated, namely be transitioned into finished product by the Bear-grudge pipe by the milling train Direct Rolling, there is no thermal contact resistance, the fin relaxation can not occur, the rib surfacing is smooth, the generation of the phenomenon such as thoroughly eliminated the knot that the space thermal resistance is folding because of the rib table and concavo-convex phenomenon causes ash, stifled ash, sealing-off between disome, break.

3. whole shape spiral fin coil according to claim 1, it is characterized in that: described spiral fin coil is monolithic devices internal and external screw finned tube.