| DK122614B | 1972-03-20 | |||
| DE1948051A1 | 1971-04-01 | |||
| DE2519210A1 | 1976-11-11 | |||
| GB1202304A | 1970-08-12 | |||
| SU673797A1 | 1979-07-15 |
| 1. | 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, c a ¬ r a c t e r i z e d in that the frame consists of two side walls (1) between which there runs a cross member (2), which by means of one or more engines (7) can be led backwards and forv/ards in the longitudinal direction of the frame. |
| 2. | A device according to claim 1, c h a r a c t e r¬ i z e d in that there in the front is mounted a cutter (6), which can be moved dovm into the underlying layer of the pipeline (9) to form a bearing (δ) for the pipe socket. |
| 3. | A device according to claim 1, c h a r a c t e r¬ i z e d in that an engine (7) is mounted on the out¬ side of each side wall (1). |
| 4. | A device according to claim 2, c h a r a e r¬ i z e d in that the cutter (β) is moved up and dovm by means of an engine (5). |
| 5. | A device according to anyone of the preceding claims, c h a r a c t e r i z e d in that at t.he front edge or the rear edge of each side wall CD there is embedded an outwardly movable and adjustable steering plate so as to abut the side wall of the ex cavation. OMPI. |
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 en¬ gine 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 accurate¬ ly, 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 con¬ sists 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 for¬ ward 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.
O PI WIPO
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 y 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. i 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 a the proper place, i.e. where the next socket is to be placed.
In order to control the device during the pushing for¬ ward in the frame, it is an advantage, as referred to in claim 5, that the device can be directionally ope- rated between the sides of the excavation by means of steering plates.
Below the invention will be further described with reference ' to the drawing, in whic
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
OMPI
the direction II-II in Fig. 1.
In Fig. 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 longitu¬ dinally 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.
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 blade serves partly for levelling the bottom of the exca¬ vation and partly for pushing forward surplus level- ling materials. Further it serves for excavation of the socket bearing.
In the front there can be mounted not shown steering plates, which are hinged to the vertical front edges of the side members, so that the steering plate can be moved a little of a lot out from the side of the frame. This is preferably done by means of hydraulic cylinders. By these means it is made possible to con¬ trol the direction of the frame when the frame is moved forward.
O PI
1 Below the operation of the device is described. As shown in the drawing the pipeline is laid down in an excavation, the pipeline consisting of pipe sections 9 which, when they are laid down, are pushed together
5 with a pipe which has been inserted in the socket of an already placed pipe. When operating the hydraulic engines the cross member is pressed down against the socket end of_ the latest placed pipe by means of which the pipes' are pushed together and the frame is subse- 10. quently moved forward in the excavation.
Having reached the right position, the cutter is led downward at the same time as the frame is led forward. By these means a bearing 8 for the socket pipe is
15 produced so the socket of the succeeding pipe -can rest in the very bearing. Subsequently the cutter is raised again so it during its forward movement levels for the socket ' bearing in the right level after which the cross section is led forward in the stopped frame. The-
20 next pipe section can now be laid down in the excava¬ tion inside the frame with the socket on a level with its bearing, and the process can be repeated. In this way a pipe line, which is supported in its full length, can be laid down, by which means it is furthermore se-
25 cured that no displacements cr breakages of the pipe¬ lines can occur. In this way the strictest demands as to laying down pipelines can be complied with in a simple and at the same time fast way.
30 The device can if necessary be provided with a bottom plate, by which means soil is prevented from pene¬ trating into the pipe assembly. This is especially ad¬ vantageous at places where folding pipes with a base are laid down, or where the soil is so soft that it is
35 not necessary to make an excavation for the sockets.