SU1740946A1 - Plate-tube heat exchanger - Google Patents

Abstract

The invention relates to heat engineering, namely to heat exchangers. The purpose of the invention is to improve the manufacturability and operational reliability of the heat exchanger. The heat transfer fluid through the collector 1 enters the pipes 6, releases heat and is discharged outside the heat exchanger through the collector 2. Heat through the walls of the pipes 6 and the plate 3 is released to the gaseous medium blown through the heat exchanger. The flanges 5 are made in the form of a cone with an opening angle of 4-8 °. and a height greater than three times the distance between the plates 3, and the flanges of the end plates have a variable thickness, decreasing towards the edge. In this case, a tight joint between the flanges is formed due to the diffusion of the surface metal layers. 1 hp f-ly, 8 ill.

Description

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The invention relates to heat engineering, namely to heat exchangers.

The purpose of the invention is to improve the manufacturability and operational reliability of the heat exchanger.

1 shows a heat exchanger; figure 2 is the same, top view; on fig.Z - section aa in figure 1; figure 4 - section bb in fig 1; figure 5 - section bb In figure 1; figure 6 - plate heat exchanger; figure 7 is a cross section of figure 6; on Fig - section GG in Fig.6.

The heat exchanger contains collectors 1, 2 of the inlet and outlet respectively of the coolant, a pack of plates 3 with a series of openings 4 having conical flanges 5 entering the openings 4 of adjacent plates 3 forming the tubes 6 with a constant wall thickness. Moreover, the conical flanges 5 are made with a cone opening angle of 4-8 ° and a height exceeding the distance between the plates 3 three times, flanging 5 end plates 7, and have a variable thickness decreasing towards the edge. Holes 4 may have an elliptical profile. In this case, the opening angle of the flange of the cone 5 in the section D-D along the small axis of the ellipse is 6-8 °, and in the section G-D along the major axis of the ellipse 3-4 °.

The heat exchanger operates as follows.

The heat transfer fluid flows through the collector 1 into the pipes 6, exchanges heat with the gaseous medium being blown between the plates 3, and is discharged through the collector 2 beyond the limits of the heat exchanger.

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Claims (2)

Due to the fact that the flanges 5 are made in the form of a cone with an opening angle of 4-8 ° (for round holes 4) during mechanical assembly of the plate pack on one side, the cone in the cone self-locking (between the plates 5, the pitch does not decrease to zero) is provided, and On the other hand, a tight connection of flanges 5 between themselves is formed due to the diffusion of the surface layers of these flanges. In this case, it is not necessary to connect the flanging by soldering, welding, etc. The fabrication of flanging 5 end plates 7 of variable thickness makes it possible to obtain channels of pipe 6 with walls of constant thickness along the length. Claims 1. A plate-tube heat exchanger comprising a stack of plates with rows of holes conical flanges entering the openings of the adjacent plate to form tubes with constant wall thickness, characterized in that improving the manufacturability and operational reliability of the heat exchanger; conical flanges are made with a 4-8 ° cone opening angle and a height exceeding the distance between the plates by three times, and flanging the end plates have a variable thickness decreasing to the edge. 2. A heat exchanger according to claim 1, characterized in that the holes in the plates have an elliptical profile, and the opening angle of the flanging cone in cross section along the minor axis of the ellipse is 6-8 °, and in the section along the major axis 3-4 °. 5f FIG. 2 Aa 5-6 fig.Z FIG. four Fig 6 X Bb FIG. five YYY / 7o8ep / tysno J