SU1334028A1 - Tubular helical heat exchanger and method of production thereof - Google Patents

Abstract

The invention relates to pressure treatment, in particular to the production technology and design of heat exchangers used in various industries: heat engineering, cryogenic and refrigeration equipment, chemical plants. The invention makes it possible to increase the efficiency of heat transfer and the quality of winding by stabilizing the values of the longitudinal t and transverse t steps of coiling of finned tubes. The longitudinal and transverse windings of the tubular spiral heat exchanger are formed before winding the pipes 2 onto the core 1 during the process of connecting the pipes 2 into the bag 3 by interlacing them with one finning element 4. The pipes are welded onto the core in a package. Various ways of winding a package are considered. 2 sec. and 4 hp f-ly, 4 ill. . phage. /

Description

The invention relates to the processing of pressure, in particular to the production and construction of heat exchangers used in various industries: heat engineering, cryogenic and refrigeration equipment, chemical plants.

The purpose of the invention is to increase the efficiency of heat exchange and the quality of winding.

Figure 1 schematically shows a tubular spiral heat exchanger; figure 2 - package of tubes with a common wire spiral fins, with the adjoining non-finned tube; FIG. 3 shows a finned package rolled around an axis of the tubes, together with a pipe adjacent to it, having individual wire spiral fins; in Fig. A, a finned package of tubes, rolled together with an adjoined non-finned tube around the axis of one of its tubes, and enclosed in a casing.

A tubular spiral heat exchanger consists of a core 1, which is wound into several layers of pipe 2, and each layer of pipes is connected to a package 3 by finning element 4, which 30 heat exchanger has a stable sign intertwining the pipes 2, forming remote spacers.

The tube package can be collapsed together with a non-finned tube 5 or with tube 6 having individual fins 7. A packet of 3 tubes together with cords 8 can be encased in a casing 9.

The manufacture of the tubular spiral heat exchanger is carried out as follows.

Pre-smooth pipe 2 is collected in a bundle. Then, the pipes 2 are interlaced tightly with the finning element 4 with a given step, thus forming an integral package 3 of the pipes 2. After that, one or several packages 3 of the pipes 2 having a common wire spiral fin 3 are wound onto the core 1 in several layers. In addition, the package 3 to wind it onto the core 1 is folded around the axis of one of its pipes 2 and give it a predetermined shape. In addition, to the ribbed bag 3 (before or after coagulation) tightly connect the non-ribbed pipes 5 and / or pipes 6, having an individual spiral wire, fins 7, and then together with them wound on the core 1 in several layers. Next, the finned package 3, rolled around the axis of one of its pipes 2, together or without neoregene pipes 4 and / or pipes 6 adjacent to it, having individual wire spiral fin 7, is enclosed in a casing 9. Sealing

a package of tubes 2,5,6 in the casing 9 is produced with the help of cords 8.

Orebro Yush; its element in this case serves not only as an edge, but also. at the same time connecting the pipe into a one-piece package element. After that, one or several finned packages of tubes tightly, coil to coil, wound on the core in a few sprues. The number of pipes collected

into a package, is determined by the return (the number of pipes in the layer) and can be either equal to it (in this case one package of pipes is wound onto the core), or less, usually a multiple of times (in this case, several tight-fitting, finned tube packages). So about- tj winding

cheni the distance between adjacent tubes in each bundle is constant and equal to the diameter of the fins. The stability of the values of the 5th longitudinal (between the turns along the axis of the pipes) pitch t when winding onto the core of the packages of pipes leads to the ordering of the transverse values (between the layers

along the pipe axis) of step t, that in

whole

4Q leads to an improvement in the quality of winding, and consequently, to an increase in the efficiency of heat exchange.

Tubular spiral heat exchanger works as follows. A warm stream of gas (liquid), for example, high-pressure helium (P 1.6 MPa T 80 k), passes inside pipes 2 and pipes 5,6 (if any), and a cold stream, for example, helium

50 low pressure (P 0.07 MPa,

T 5.05K) - in the annular space, as a result of which heat exchange takes place between them.

55

Example 1. Copper pipes 2 (outer diameter 4 mm, inner 3.2 mm) are assembled into a bundle, and their axes are arranged in the same plane. Then the finning element 4 is wound tightly onto the pipes 2 with a pitch of 2.5 mm; element (wire with a diameter of 0.8 mm), thus forming a one-piece package 3. In this case, the distances between adjacent pipes 2 in package 3 are constant along its entire length and width and equal to the diameter of the wire used for the fins, i. 0.8 mm, and the longitudinal pitch t is also constant and equal to 4.8 mm. After that, one or several packages of 3 pipes 2, having a common wire spiral ribbing, tightly wrapped to a coil, are wound in a winding on the core not on the core 1 in several layers. In this case, the number of pipes 2 in packages 3: is determined by the length of each

lay down:

PRI mme R 2. Similarly to the above, a finned package 3 is assembled from a network of pipes 2 (the parameters of the materials used are identical). Then the finned tube 5 (outer diameter 4 mm, inner 3.2 mm) is tightly attached to the finned package 3. After that, this package of seven pipes is folded around the axis of one of the pipes 2, then enclosed in

How many layers of pipes that have spiral ribbing, characterized in that, in order to improve the quality of winding, the pipes before the core are joined into the package by interlacing them with the ribbing element and wrapped by the package.

3. Method POP.2, differing from 25 to 25 so that the package is folded around the axis of one of its tubes before winding onto the core.

4. The method according to PP.2 and 3, which is based on the fact that the package of pipes

a cylindrical housing 9, is wound on a core together with

and wound on the core i.

The technical and economic efficiency of the use of this design of the tubular spiral heat exchanger and the method of its manufacture is the result of loss reduction. from underrecovery and downsizing of the heat exchanger by increasing the compactness of the heat exchanging surface and increasing the intensification 40 hours a day due to the fact that before heat exchange in the annular space to the core, the package of pipes should be replaced.

formula

the invention

1. A tubular spiral heat exchanger comprising a core with tubes wound in several layers having spiral finning, characterized in that, in order to increase the efficiency of the heat exchange process, the tubes of each layer are connected into a package by a common finning element.

2. A method of manufacturing a tubular spiral heat exchanger, including layers of tubes having spiral finning, characterized in that, in order to improve the quality of winding, the tubes are folded into the bag before being nailed to the core and interlaced with a finning element. .

3. Method POP.2, which is also distinguished by the fact that the package is folded around the axis of one of its tubes before winding onto the core.

4. The method according to PP.2 and 3, which is based on the fact that the package of pipes

adjacent to the Hei neobrenny pipes.

. 5. The method according to PP.2-4, which is based on the fact that the package of pipes is wound onto the core together with the adjacent pipes having individual spiral fins.

6. The method according to item 3 - 5, about t of l include in a casing.

Fig.Z

FIG. it

Editor M. Tsitkina

Compiled by E.Shvets Tehred M. Didyk

Order 3954 / AO Circulation 611 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. D. 4/5

Production and political enterprise, Uzhgorod, Projecto st., 4

Proofreader M. Demchik

Claims (6)

Claim 1. A tubular spiral heat exchanger containing a core with □ pipes on it having several layers having spiral fins, characterized in that, in order to increase the efficiency of the heat transfer process, the pipes of each layer are connected into a packet by a common finning element. 2. A method of manufacturing a tubular spiral heat exchanger, comprising 15, which is wound in the winding onto the core of several layers of pipes having spiral finning, characterized in that, in order to improve the quality of the winding, the pipes are joined into the bag before being wound onto the core by weaving them with a finning element, and the winding is produced by the bag. 3. The method according to claim 2, about t l and h and go 25 with the fact that before winding onto the core, the packet is rolled around the axis of one of its pipes. 4. The method according to claims 2 and 3, characterized in that the pipe package 30 are wound onto the core together with the non-finned tubes adjacent to the Hei ^ r. 5. The method according to claims 2 to 4, characterized in that the pipe bundle _{35 is} wound onto the core together with adjacent pipes having an individual spiral finning. 6. The method according to PP.3 - 5, characterized in that before winding onto the core, a packet of pipes is enclosed in a casing. Phi. " 2 Fig.Z FIG. 4