SU50770A1 - A device for cleaning sediments from the outer surface of pipes of horizontal tubular heat exchangers, for example, evaporators during their operation - Google Patents

Description

Arrangements are known for cleaning sediments from the outer surface of pipes of horizontal heat exchangers, for example evaporators, during their operation, using interconnecting grids located in the heat exchanger cavity, forcibly moved along the pipes passed through their openings.

In the proposed device, in order to facilitate installation, each of these grids is formed of two sheets with holes for pipes, and these holes are made corresponding to pipes of radius only on half of the circumference, facing each other in opposite sheets, and oval in shape on opposite sides or larger radius.

In the schematic drawing of FIG. 1 is a front view of a part of the lattice; FIG. 2 is a cross-section of the gratings through the pipes; FIG. 3 is a cross-section of a heat exchanger with a device for moving gratings; FIG. 4 is a side view of a spring connecting the two plates of the grid; FIG. 5 top view

(left side) and horizontal section (right side) of the part of the teloexchanger; FIG. 6-section on AB in FIG. five.

Intermediate grids in the amount of two or three along the length of the heat exchanger, through which the horizontal tubes 3 of the apparatus pass, are formed from two sheets / and 2 laid one on top of another (Fig. 2) with openings 4 of a peculiar shape (Fig. 1 and 2). The holes are bounded by two semicircles, of which one is 0.1 L1m in diameter more than the diameter of tubes 5, and the diameter of the other is 2 mm larger. The holes are arranged in such a way that in one sheet the narrow part is directed upwards and in the other - downwards.

The sheets are strutted by springs 5 (figs. 3 and 4) so that the lattice sheets are pressed against the tubes from above and below with their narrow sides, so that the tubes 3 are almost closely covered with the edges of the grids (fig. 2) from all sides, although in two planes x. The pressing rod is adjusted by tensioning the springs 5.

When assembling a heat exchanger or when laying tubes 3 in it

repair time, sheets 7 and 2 are not mounted by springs 5, as a result of which the holes in the sheets form gaps with a diameter 2 mm larger than the diameter of the tubes, which makes installation easier. At the end of the installation, they tighten with bolts.

The grilles are placed in the grooves of the frame 6 or angular iron, so that when the first grille is located at the back of the apparatus, the latter is located at a known distance from the front wall equal to the distance between the individual grilles. The frames 6 are fastened together in one frame by longitudinal angles 7 (FIG. 3), and the lower corners are provided with rollers running along the bottom of the heat exchanger (not shown in the drawing).

On top of two pairs of longitudinal upper angles 7, 7 cubic meters, the gear racks 8, 8 (Fig. 3, 5, and 6), linked to the gear teeth 9, 9, driven from the shaft 10, are supported on one side on the bearing 11, and on the other side going through the gland 12. The shaft 10 is driven in slow motion from the serrated teeth with a worm (approximately half a turn per minute), and at the end of a certain stroke the shaft receives a reverse movement using a mechanism similar to the same mechanism planing machines.

When the mechanism is started up, the teeth 9 begin to move the rails 6 together with the frame attached to them. The advancement takes place until the rail moves to a distance equal to one gap between the two lattices, i.e., to the front wall, after which the reverse movement begins. After reaching the rear wall, reverse movement begins.

and so on, of this movement, the grids, pressed to the tubes by springs, slide along the tubes in a liquid medium and wash off all contamination from them. Due to the presence of the springs 5, the movement occurs smoothly and smoothly without danger to the integrity of the tubes and parts of the apparatus, even if there are elevations on the tubes and the like. Since the layer of scale is removed at the very moment of its inception permanently and completely, due to the movement of the gratings back and forth, the surface of the tubes always remains completely clean.

The subject matter of the invention.

Claims (2)

1. A device for cleaning sediments from the outer surface of pipes of horizontal tubular heat exchangers, for example, evaporators, during their operation, using interconnected grids located in the heat exchanger cavity, forcibly moved along pipes passed through their openings, characterized in that the lattice is formed of two sheets / and 2 with holes for pipes made of a corresponding pipe of radius only on the halves of the circle, facing the adjacent sheets towards each other, and opposite olezhaschih sides have an oval shape or the like bblshego radius, with a view to facilitate mounting gratings. 2. When adjusting according to claim 1, use of a rack-and-pinion gear arrangement located in the heat exchanger with rails 8, 8 fixed on the supporting grid of the mobile frame and with gear 9, 9 mounted on the shaft. the shank of which is withdrawn has broken at the heat exchanger case. to the author's testimony of L. I. Shapiro Sy 50770 Osuisoo fe © ©