CZ211197A3 - Device for enlargement of pipe ends, particularly ends of a chimney pipe - Google Patents

Abstract

The expander has a support table with expander segments, and expander jaws supported on the outside of the segments. When in rest position, the expander jaws (1) have an outer conical contour. The jaws also have outer aligned circumferential ribs (7), and grooves (9) near the upper and/or lower end faces (8, 3). The grooves contain return springs (10). The cones (6) formed by the individual expander jaws have the same cone angles.

Description

Ordinance on expanding pipe ends, in particular, dimensioning the pipe ends

Ob.la.st ........ techn

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for widening pipe ends, in particular chimney pipe ends, with a bearing table for an expanded pipe end, with a lift cylinder supported on a bearing table, the piston rod being connected to a multi-angled plug the piston rod tapers, with the plug elements mounted on the outer sides of the male mandrel, which form an outer cylindrical contour in the rest position and with the jaws resting on the outer sides of the plug element.

Reach and defect ..... in the chimney technology, the chimney parts of the pipe and the Ten end end

For rehabilitation consisting of a plurality of extensions to form a sleeve of the mentioned type, which is 14 033. In the known shaft inserted pipe parts of the pipe must be produced by the device described in the German utility model device forming expansion jaws

DE-GM 93 cylindrical contour in rest position outside. Later, portions of the chimney pipe have been proposed, each pipe portion having a conically widened end and a conically tapered end with the same cone angle so that adjacent pipe portions. .jsou. interconnected by plugging the tapered end into the extended end, see FIG. DE 195 47 677. Both conical ends are widened and have a larger diameter over their length than the central part of the pipe.

Essentials and ........ crawl $

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SUMMARY OF THE INVENTION It is an object of the invention to widen the ends of the pipe sections conically.

This object is achieved by a device of the type mentioned above, in which the jaw has a conical contour from the outside in the rest position. The widening jaws are in a rest position when they contact each other with their side faces and the widening jaws form a cross section over which the widened end of the pipe can be slid. When the extension jaws are positioned in a different spatial orientation relative to the insertion element, i.e. rotated by 180 [deg.], It is also possible, in principle, to produce the widened ends of the sleeves as well as the widened insertion ends with the same cone angle.

However, it is also possible to use extension jaws which are designed both for the production of the expanded ends of the sleeve and for the production of the expanded insertion ends. For the production of the extended ends of the adapter, it is recommended that the extension jaws have circumferential ribs on top of one another. By means of these circumferential ribs, the outwardly directed notches are pushed out at the end of the sleeve, which serve when the insertion end is introduced into the sleeve end as a capillary closure or as a moisture collector.

. The widening jaws for making the insertion ends preferably have a tapered section attached thereto in the region of their largest cross-sectional end, so that the insertion end extending beyond the diameter of the pipe portion passes into the pipe portions by its tapering step. The tapered ends may preferably form a cone in the rest position of the jaws.

The cones formed by the jaw extensions, whether used to form the end of the sleeve or the insertion end, have the same apex angle.

Preferably, the extension jaws may have grooves for the directing springs disposed therein at their upper and lower sides, so that at the end of the operation, when the insertion mandrel returns to its starting position, the extension jaws also return to their rest position by the directing springs.

BRIEF DESCRIPTION OF THE DRAWINGS

The following is an example of an embodiment of the invention illustrated in the drawings, in which:

Fig. 2 is a plan view of the expanding tool according to Fig. 1; 3.

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Examples of wiring ........

The expansion tools shown in the drawings are used in a pipe end extension device, in particular a chimney pipe, as described in German Utility Model DE-GM 93 14 033. This device is not shown. Its basic components include a support table for the widened end of the pipe, a lift cylinder supported on the support table, the piston rod of which is connected to a multi-carbon insertion mandrel positioned above the support table, the cross section of which in the rest position on the outer and expanding tool with expanding jaws on the outer sides of the plug-in elements.

1 to 4, which in the rest side surfaces of the second surface 2 are formed on the side

The expanding tools shown consist of six expanding jaws touching a position adjacent to each other. In the illustrated embodiment, they are lateral in the radial direction. The expansion jaws 1 are slidably supported by their undersides 3 on a storage table (not shown) of the expansion device. 2, the inner jaws 1 form a cylindrical contour 4 in the illustrated rest position, wherein each jaw 1 is supported by this contour 4 on one adjacent insertion element (not shown) and each insertion element is supported axially on an adjacent side surface of the insertion element (not shown). also in axial direction 5.

it tapers so that when the plug-in and thus also the expansion jaws 1 are moved outward to expand the end of the pipe seated on the expansion tool.

The cross-section of the plug-in mandrel is the plug-in elements

The expansion tool shown in FIGS. 1 and 2 serves to produce conically with respect to the pipe diameter of the widened end of the sleeve. Therefore, the extension jaw 1 has a conical contour 6 from the outside when the rest is at rest, the cross-section of the extension tool in the region of the bottom side 3 on the receiving table being the largest. Each extension jaw 1 has a circumferential rib 7 on the outside in the region of the conical contour 6, which circumferential ribs 7 are aligned with each other in the rest position of the extension tool. Each extension jaw also has a groove 9 in the region of its upper side 8 and its lower side 3, the grooves 9 in the rest position of the expansion tool forming a single through groove in which the directive spring 1.0 is received.

The pipe end widened in the shape of the conical end of the sleeve is positioned in the rest position of the expander from the top side 8 in the direction of the bottom side 3 along the entire expander. The engaging mandrel is then actuated, with the expanding jaws being pushed outward by the engaging elements mounted on the engaging mandrel and the end of the pipe widened.

In Figures 3 and 4 the same reference numerals show the same parts. The extension tool shown in these figures is intended for the production of the insertion ends. Expansion jaws, 1. are mounted with their underside 3 on a storage table (not shown). The cross section of the outer conical contour 6 formed by the widening jaws 1, in the rest position, initially widens from the lower side 3 in the direction of the upper side 8. A section 1 ... 1 is connected to the largest cross-section area, which tapers conically in the direction of the upper side 8. The tapered cone angle of this tapered section 1.1 is greater than the tapered cone angle of the outer conical contour 6.

from the top of the activity

The pipe end extended to the plug-in end is seated side 8 on the extension tool supported by its bottom 3 on the receiving table. When the male mandrel is inserted into the widening jaw, the widened end widens conically, with the conical widening passing into the pipe diameter. It will be understood that the sleeve and, on the other hand, the insertion end of the insertion portion of the pipe portion may introduce into the sleeve end of the adjacent portion of the pipe.

.1 moving from over the diameter of themselves, the pipe, through the stage formed by the section that the extensions on the one hand, the ends are formed such that

Claims (4)

PATENT CLAIMS An apparatus for expanding pipe ends, in particular chimney pipe ends, with a bearing table for an expanded pipe end, with a lift cylinder supported on a bearing table, the piston rod of which is connected to a multi-carbon plug mandrel disposed above the bearing table. the bar tapers, with the plug elements mounted on the outer sides of the plug mandrel, which in the rest position form a cylindrical contour on the outer side and with the jaws (1) supported on the outer sides of the plug element, indicating in that the expansion jaws (1) have outside conical contour (6). in the k1 position 2. Device according to claim 1, characterized by by expanding the jaws (1) have on the outside circumferential ribs (7). matching each other 3. Device according to claim 1, characterized by by expanding the jaws (1) have, in the region of their end with the largest cross-section, a tapered section (11) attached thereto. Device according to claim 3, characterized in that; that the tapered section (11) forms the skin 1 in the rest position of the widening jaws (1). Device according to one of Claims 1 to 4, characterized in that the widening jaws (1) have grooves (9) for receiving directive springs (10) on their front side (8) and / or bottom side (3). Device according to one of Claims 1 to 3, characterized in that the cones formed by the expanding jaws (1) have the same apex at the angle 1.