SU1763840A1 - Method of assembling heat exchanger - Google Patents

Abstract

Usage: in shell-and-tube heat exchangers of the serpentine type. SUMMARY OF THE INVENTION: Spacers are put on the cores before winding onto the core, which are mounted so that they can move along the axis of the tubes during the subsequent winding. The number of rings placed on one coil is 0.0635-0.0668 of the average diameter of the winding tube. 3 Il.

Description

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The invention relates to a method for assembling coil-type heat exchangers and can be used in cryogenic engineering, in heat engineering and the chemical industry.

There is a method of assembling a heat exchanger by winding on cores in several layers of tubes with fins arranged relative to each other both in a checkerboard and in a corridor order of 1.2.

A known method of assembling a heat exchanger is by installing spacing fins on the pipes, placing the pipes in rows in a staggered order, and then winding the rows of pipes onto the core 3.

The disadvantage of this method is that the transverse and longitudinal steps of winding the tubes during the winding process are not constant; depending on the

the nature of the contact between adjacent layers, their values vary from minimum to maximum. Such unevenness of winding is a design feature of this heat exchanger, which under production conditions serves as one of the main causes of the occurrence of rejection. In order to ensure the efficiency of this type of apparatus, special care and control are required, i.e. flashing control of the winding diameters and the number of tubes in each layer, which greatly complicates the manufacturing technology.

The aim of the invention is to simplify the manufacturing technology by employing spacer rings in the winding process.

In the method of assembling a heat exchanger by installing spacing fins on the pipes, placing the pipes in rows

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matte order, and subsequent winding of rows of pipes on the core, use spacer rings as spacer edges, which are mounted on alternating rows of pipes with the ability to move along the subsequent axes during the subsequent winding, and the number of rings placed on one coil is 0.0635-0.668 of the average diameter of the pipe winding.

1 shows a heat exchanger, section; FIG. 2 shows a portion of the winding of heat exchange tubes with spacer rings; on fig.Z - view of the winding on top.

The tubular twisted heat exchanger contains a casing 1 with flow inlet tubes 2, 3 and output 4, 5 inside the casing there is a core 6, on which heat exchange tubes 7 with alternating smooth 8 and silver 9 sections are wired; 10, made of wire and installed discretely. The seal between the winding and the core (shell) is carried out by a soft cord 11. The heat exchanger operates as follows.

One of the heat exchanging media is fed through the inlet 2 to the tube space. The other medium through the nozzle 3 enters the annular space, washes the tube 7 outside, exchanging heat with the medium of the tube space and is removed through the outlet nozzle 5, and the medium passing through the tube space is withdrawn through the outlet nozzle 4.

Spacer rings 10, which play the role of spacer elements and fins, are a secondary surface and act as an intensifier of heat exchange.

An example of the method.

The spacer rings 10 are put on the tube 7 before winding on the core 6 and are placed on the section of the tube between the tension device and the core 6 of the heat exchanger.

In the process of winding, the rings 10 are moved along the axis of the tube 7 and fixed in the coil by tightly pressing the tube 7 to the core 6 or the previous layers.

Claims (1)

Invention Formula The method of assembling the heat exchanger by installing spacing fins on the tubes, placing the tubes in rows in a staggered order and then winding rows of tubes onto the core, characterized in that, in order to simplify the manufacturing technology, spacers are used on alternating rows of tubes with the possibility of moving along the axis of the latter in the process of winding, with the number of rings placed on one turn being 0.0635-0.0668 of the average diameter of the tube winding. one five 1 ЈSS / 7777sZ /// S77, b ;; io FIG, I