SU105903A1 - Rolling for fastening pipes in the walls of drums and collectors - Google Patents

Description

Rollers for fastening pipes in the walls of drums and collectors of steam boilers and other vessels are known.

However, when the wall thickness in which the pipe rolls is changed, it is necessary to change the rolling rollers, which complicates its design and use.

In the described rolling, this task is eliminated by the fact that its casing is provided with slots for beading balls, which are under the action of a pressure ring and a nut screwed onto the cover; the bodies, the balls can vary in the longitudinal direction so that all the time one side is in contact with the rolling cone. This movement in the presence of flare rollers of proper length provides for the rolling of pipes in the walls of different thickness without changing rollers.

The drawing shows the rolling in the longitudinal section ..

Rolling consists of body 1, which has, like the usual rolling, three rectangular oblique slits for rollers 2, designed for rolling pipes in a tube sheet of maximum thickness, and three radially through holes for balls 3 designed for. pipe disassembly.

From the rear side, the cover S is screwed to the body / bolted 4, which has an outside thread, on which the nut 6 is screwed. (Languages) included in these slots, and 2 rollers against the rollers, giving the rollers the freedom of radial movements in the grooves during pipe flaring. The ring 7 can move along the body with the screwdriver 1.5an1: and or roll the nuts 6 and slide the balls 3 along the notches that abut against this ring. On the body of the rolling machine, there is a liner on which a scale is applied indicating the thickness of the tube plate.

The rollers and balls are prevented from being crushed by protrusions, and from being pulled inside by a cone 8.

The cone 8 must be of sufficient length for rolling and ramming the pipes of the specified outside

diameter at different thickness of the pipe wall and the thickness of the tube plate.

A pin or shnlint and a washer are attached to the end of the cone to prevent the cone from falling out of the body. Outside of the nut 6 having openings for turning, a distributive sleeve 9 can be placed, which is used to set the rolling to a predetermined amount of the protruding end of the pipe ("bell"). The nut 6 and the sleeve 9 can be combined in one piece.

The work described by rolling is carried out in the following way.

Rolling is adjusted to the rear thickness of the tube sheet by screwing the nut 6 on the cover 5 to the desired division of the scale printed on the housing; then the cone S is pushed inside the housing and, when rotated, rolls out and, after it, the pipe is sorted.

When using rolling only to fasten the pipe (without disassembling), the sleeve 9 extends to the body so that the balls

3 moved away from the pipe by the size of its own diameter, folded with the length of the protruding end of the pipe. One roll can replace up to ten sizes of conventional rolls.

Subject invention

Rolling for fastening pipes in the walls of the drums and collectors, including: a housing with a cone inserted into its cavity, rolling rollers, boring balls moving under the action of a nut screwed onto the housing, in longitudinal grooves located on its outer side, characterized in that , in order to ensure the expansion and boring of pipes in the walls of tube plates of various thickness, the grooves of the body are made in the radial direction through, and the sorting balls in them, not moving in the longitudinal direction, all the time ne side in contact with the cone rolling.

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