RU1838744C - Heat exchanger and method of its manufacture - Google Patents

Description

The invention relates to spiral heat exchangers and can be used in power and transport engineering.

The drawing shows a heat exchanger from the side of the air cavity.

The heat exchanger (Fig. 1) comprises a casing 1, in which a flat spiral pipe 2 is located, consisting of two sections arranged in alternating order to form a bifilar spiral, the distance between the turns of which is constant.

The pipe sections in the central part are interconnected using an adapter 3. located along the axis of the heat exchanger with the possibility of rotation about this axis. Holes are made in the casing of the heat exchanger, through which the external ends of the pipe together with the attached inlet and outlet fittings 8 and 9 are brought out of the casing 1. Between the turns of the pipe 2 there is a corrugated tape 4 in contact with the surfaces of the pipe 2. A rod 5 is attached to the adapter 3 , us00

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mounted perpendicular to the axis of the heat exchanger with the possibility of rotation about this axis. On the casing 1 of the heat exchanger, fixing elements are installed in to which the ends of the rod 5 are attached, in particular the ends of the rod 5 can be attached to the fixing elements 6 using a screw pair 7.

A method of manufacturing a heat exchanger (Fig. 1) is as follows.

A flat spiral pipe 2 with a constant distance between the turns is made of two parts, an adapter 3 is attached to the inner ends of it. Then, an adapter 3 is installed together with the pipe 2 and the casing 1 along the axis of the heat exchanger can rotate around this axis, and the outer ends pipes outside the casing 1. Then, in the annular space of the heat exchanger, a corrugated tape 4 is placed with a gap, a rod 5 is fixed on the adapter 3 perpendicular to the axis of the heat exchanger. Then, the pipe 2 is moved by rotating the rod 5 together with the by the walker 3 until the corrugated tape 4 is tightly contacted with the surfaces of the pipe 2. In this case, the outer ends of the pipe 2 extending beyond the casing 1 are pulled into the heat exchanger casing. After close contact is achieved, the position of the rod 5 relative to the housing 1 is fixed by attaching the ends of the rod 5 to the locking elements b. in particular using a screw pair 7.

The heat exchanger operates as follows.

The cooled heat carrier enters the heat exchange pipe 2 through the inlet 8. The heat exchange pipe 2 is made in the form of a bifilar spiral, the cooled heat carrier transfers heat to the atmospheric air moving along the channels formed by corrugated tape 4 and the outer surface of the heat transfer pipe 2. The cooled heat carrier exits through fitting 9.

When the contact of the corrugated tape 4 with the surfaces of the pipe 2 is weakened during operation of the heat exchanger and the corresponding heat exchange deteriorates, contact improvement is achieved by additionally twisting the pipe 2 with the help of the rod 5 by means of a screw pair 7.

The proposed device of the heat exchanger and the method of its manufacture allow by increasing the manufacturability of the design due to the reduction of labor

its manufacture, to reduce the cost of manufacturing a heat exchanger by 20-25% due to the rejection of the integral connection of the corrugated tape with the surfaces of the heat transfer pipe obtained by brazing (brazing in vacuum, salt bath), gluing, etc.

Formulas a shade of shade

Claims (3)

1. A heat exchanger comprising a casing with a flat spiral pipe placed in it, the distance between the turns of which is constantly filled with a corrugated tape in contact with the surfaces of the pipe, characterized in that the pipe is made of two sections arranged in alternating order to form a bifilar spiral and communicated with each other in the central part of the heat exchanger using an adapter, with a rod attached to the latter, mounted perpendicular to the axis of the heat exchanger, with the possibility of rotation but on this axis, and the casing has holes through which the outer ends of the pipe are pulled out of its limits, and is provided with fixing elements to which the ends of the rod are attached. 2. The heat exchanger according to claim 1, characterized in that the ends of the rod are attached to the fixing elements with a screw pair. . 3. A method of manufacturing a heat exchanger by placing a flat spiral pipe in the casing with a constant distance between the turns and filling the annular space with a corrugated tape. It differs in that the pipe is made of two sections, one end of each section the pipes are attached to the adapter, then the adapter is installed in the casing along the axis of the heat exchanger with the possibility of rotation around this axis, holes are made in the casing, and the free external ends of the sections the pipes are led out through these openings outside the casing, after which a heat exchanger is placed about the annular space with a gap relative to the pipe, and a rod is fixed to the adapter perpendicular to the axis of the heat exchanger, then the pipe is moved in a spiral by rotating the rod together with the adapter to making tight contact of the corrugated tape with the pipe surfaces and fix the end position of the rod relative to the heat exchanger casing by attaching the ends of the rod to the fixing elements. 2