CS255459B1 - Tool for cutting cast iron pipes - Google Patents

Abstract

The solution relates to a preparation which can be used to cut cast iron pipes even in worse working conditions. The fixture consists of three curved segments with doubled sidewalls at the ends provided with curved cut-outs, in which the rollers are rotatably supported, one of the segments being provided with a straight-cut holder for radially guiding the tool with the cut-off wheel.

Description

The present invention relates to a device which can be used to cut a cast-iron pipe even in poor working conditions.

Cast iron pipes must be shortened during assembly or repair, either by chopping or by electric arc. Manual cutting is laborious and also the burning of pipes in the closed energy channels is harmful to health and moreover, when the pipe is flooded with water, the iron pipe is cracked due to thermal stress. Hand cutting is very lengthy and laborious.

The existing drawbacks are remedied by the cast iron pipe cutting device according to the invention, which consists of three curved segments with double sidewalls at the ends provided with curved cut-outs in which the rolling roll pins are rotatably mounted, one of the segments being provided with a cut-out holder. radial guidance of an electric or pneumatic tool with a cut-off wheel.

The fixture is very mobile and in one specific size it fits for a certain range of pipe diameters. Several size sets of these fixtures therefore cover the entire commonly used piping system. Working with this product several times faster is cutting pipes and is especially useful when used in assembly, outdoor work and in confined spaces and excavations.

The invention is illustrated by way of example in the drawings, wherein FIG. 1 is an overall view of the device, FIG. 2 is a detail of the segment connection, and the rolling roller bearing according to P in FIG. Cast iron pipe.

Three curved segments 7, 1 'with double side walls 4', 6 'are provided at their ends with curved slots 6 in which the pivots 11 of the three rolling rollers are rotatably mounted. Segment 7 is provided with a holder 9 into which the electric rotary tool 10 s grinding wheel ^{11. <^ to} two adjacent pairs of segments 1 /, has a joint pin 2 ^with sidewalls

2, provided detachably, for example by omitting the usual axial securing with Seger fuses, which can be replaced by a threaded run-out of the wing nut pin 7 and the like.

Figure 3 illustrates the handling of the jig: the tool 10 with the cut-off wheel 11 is mounted by the segment 2 ^{on the} cast iron shank 12, the remaining two segments 1 /, 2 ^are folded together and clamped by the connecting roller 2 ^and pressure by the tool 10 on the cutter 11 the pipe wall 12 is cut, the straight cutout 13 in the holder 2 providing the tool 10 with the necessary guidance. Then, the cut hole in the pipe 12 by moving the tool 10 along the circumference of the pipe 12 expands until the cut is complete,

The invention does not depart from the principle of the invention in which the continuous curved cutout 2 is replaced, for example, by a series of holes.

Claims (1)

SUBJECT OF THE INVENTION A jig for cutting cast iron pipes, characterized in that it consists of three curved segments (1, 1 ', 1) with double sidewalls (4, 4') at the ends provided with curved cut-outs (6) in which pivot rollers (7) are rotatably mounted (8), wherein one of the segments is provided with a holder (9) with a straight cutout (13) for radially guiding the tool (10) with the cut-off wheel (11).