Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1982-12-30
1986-03-18
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
405170, F16L 102
Patent
active
045765146
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a device for laying down a pipeline consisting of pipe sections, which are pushed together, the device comprising a frame which by means of a stress can be pushed forward in front of the spigot end.
A device of this type is described in Danish Patent No. 122.614. However, the device known from this patent is not well fitted in every respect. It has thus turned out to be difficult to make a precise steering when the device is pushed forward in the excavation, and it is also akward to work with an indoor driving engine which takes up room for the operators, especially during the process of laying down the pipe sections. Besides it is difficult to handle the device accurately, as it can easily pivot on the pressure point at the spigot end.
It is the object of the present invention to meet the defects of the already known device, and according to the invention this is obtained, when the frame consists of two side walls between which there runs a cross member, which by means of one or more engines can be led to the rear of the frame. In this way a useful and even stress from the spigot end and to the two sides of the frame is obtained, by which means it turns out to be considerably easier to control the forward movement of the device in the excavation. This is especially due to the fact that the device can not rock around the pressure point. Furthermore no room is taken up inside the frame, and this facilitates the mounting of the pipe sections for the operators who are inside the frame.
By mounting a cutter in the front of the device, as referred to in claim 2, there can at the bottom of the excavation be produced a countersinking for the pipe socket. By these means a complete support of the whole pipe, and with it a complete support of the pipeline in its full length, is obtained. Consequently the pipe section rests on the whole of the underside contrary to the hitherto known device, according to which the pipe sections balance on the sockets.
Furthermore it is expedient, as referred to in claim 3, to place the engines on the outside of the frame, by which means the accomodation inside the frame will be the best possible.
Furthermore it is expedient, as referred to in claim 4, to operate the cutter by means of an engine, as it in this way can be operated by the staff in the frame at the proper place, i.e. where the next socket is to be placed.
In order to control the device during the pushing forward in the frame, it is an advantage, as referred to in claim 5, that the device can be directionally operated between the sides of the excavation by means of steering plates.
Below the invention will be further described with reference to the drawing, in which
FIG. 1 shows the device partly in cross section and seen in the direction I--I in FIG. 2, and
FIG. 2 shows the device seen in cross section in the direction II--II in FIG. 1.
In FIGS. 1 and 2 an embodiment of a device is shown. It consists of a frame constructed of two side walls 1, which in their front are provided with a front section 10. In both sides there is a longitudinally running slit, through which a cross member 2 is led. At its ends 3 outside the frame this cross member is fastened to the movable part of an engine 7, preferably a hydraulic cylinder. The stationary part of the engine is fastened to the side of the frame so the cross member can be led backwards and forwards in the frame, when the engine is operated. The engine 7 is protected by a cover 4 which are affixed to the sidewalls. Bushings 12 (only one shown) are likewise attached to the sidewalls. Ends 3 are maintained within said bushings 12 to form a mechanical link between the sidewalls 1 and engine 7.
In the front there is mounted a cutter 6, said cutter being functioning as a so-called dozer blade, which can be moved to a position below the level of the side members. The cutter 6 can have either a curved shape, corresponding to the outer form of the socket, or be plane. The cutter can be moved up and down preferably by means of an engine. Said cutter or dozer b
REFERENCES:
patent: 3113628 (1963-12-01), Orcutt
patent: 3204417 (1965-09-01), Robley
patent: 4059965 (1977-11-01), Stuckmann
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