METHOD FOR ERECTING BODIES OF A CONSIDERABLE HEIGHT, IN PARTICULAR WITH INTERPOSING OF COUPLING MEANS, AND A HOISTING DEVICE HEREFOR

Abstract: The invention relates to a method for erecting bodies (4) of a considerable height by means of a hoisting device, wherein in a lying position the body (4) is coupled at an intermediate position to a hoisting cable (8) of the hoisting device controllable by the lifting unit (7) and is lifted by the lifting unit (7). The invention also relates to a tripod hoisting device for erecting bodies of a considerable height, comprising a standing tripod (2, 3), a lifting unit (7) supported by the upper part of the tripod (2, 3), at least one hoisting cable (8) controllable by the lifting unit (7) and a lying base frame (1) for fixing the position of the tripod (2, 3).

Description: METHOD FOR ERECTING BODIES OF A CONSIDERABLE HEIGHT, IN PARTICULAR WITH INTERPOSING OF COUPLING MEANS, AND A HOISTING DEVICE HEREFOR The invention relates to a method for erecting bodies of a considerable height by means of a hoisting device . It is generally known that in the erection of bodies of a considerable height, for instance a height of 50 m or more, which bodies are generally voluminous and heavy, for instance 1,000 tons or more, such as for instance constructions of reactor vessels in the processing industry, wind turbines and construction modules in public utilities and bridge construction, use is made of very heavy and high hoisting installations. It is generally required that the hoisting height of the crane exceeds the height of the body to be erected. It is also noted that moving and arranging such sizeable hoisting devices at a construction site often causes great problems, particularly where use has to be made of a counterweight. The invention has for its object to provide a method which aims to resolve this problem, which mechod is characterized in that in the lying position the body is coupled at an incermediate position to a hoiscing cable of the hoisting device controllable by a lifting unit and is lifted by this lifting unit. It is hereby possible to erect a body which is considerably higher than the hoisting device. The method is particularly recommended where control means are present at the bottom end of the body for erecting which position the bottom end of the body for erecting in a raised situation. It hereby becomes possible to hitch and control the body until it takes up its eventual end position, for instance on a pre-laid foundation. The invention likewise relates to a tripod hoisting device for erecting bodies of a considerable height in accordance with the above stated method, which hoisting device comprises a standing tripod, a lifting unit sup- ported by the upper part of the tripod, at least one hoisting cable controllable by the lifting unit and a lying base frame for fixing the position of the tripod. This base frame, which generally supports on the ground surface, makes an equilibrium of forces possible within the periphery of the installation, wherein the vertical force components react against the ground surface. The invention will be further elucidated by the description of several embodiments with reference to the annexed drawing, in which: figures 1, la and lb show schematic views of embodiments of the hoisting device according to the invention; figure 2 shows a schematic perspective view of a first and second stage in the erection of a body; figure 3 shows a view similar to figure 2 wherein the body is shown in erected position; figure 4 is a perspective view of a preferred embodiment of the hoisting device; figure 5 shows a preferred embodiment of the coupling means according to the invention; and figure 6 shows a preferred embodiment of a hoisting device provided with control means according to the invention. Figure 1 shows an embodiment of the hoisting device as well as a method of erecting this device on base frame 1. Subject to requirements, the basic form of this base frame 1 can be built up as in figures la and lb. The form as according to figure lb with five fixation legs makes it possible to situate a foundation 9 for the object for erecting wholly or partially within the periphery of the hoisting device. The choice of the dimensions and material of base frame 1 and of three legs of masts 2 and the rear mast 3 depends on the relevant application. For the construction of the masts use can be made inter alia of elements which are designed such that water and land transport are considerably simplified, for instance in a standard size suitable for container transport. Figure 2 shows schematically an embodiment of the method with the hoisting device depicted in figure 1, the starting position and an intermediate position of the object 4 for erecting, in addition to the hitching and control means determining the method, the coupling means in the form of a yoke 5 and the control cables or, in another application, the control cylinders β. Hoisting takes place in this embodiment by means of a hydraulical- ly operating lifting unit 7 and hoisting cablets) 8 which are connected to yoke 5 via a hook, sling or anchor. Figure 3 shows the object 4 erected and placed on its foundation 9. The illustration makes clear that the method results in a considerable reduction in the height of the hoisting device. Other advantages which this method provides are achieving of the required stability without the use of a generally bulky counterweight and combining of the mounting of control elements 6 on base frame 1, which makes an external anchoring unnecessary and wherein the whole play of forces can find equilibrium within the periphery of the hoisting device. Figure 4 shows a hoisting device applied for the method wherein the rear leg 3 is formed by the jib of a for instance telescopic, mobile crane. It will be apparent that by adding the masts to such a crane in this manner the hoisting capacity is increased subject to hoisting height and/or weight of the load. Figure 5 shows schematically the preferred embodiment of coupling means 5 for the method of hitching the load. These coupling means 5 can form part of the object for erecting as well as being fastened temporarily thereto in the form of an assist means. These coupling means comprise a support frame 5a and a connecting element 5b for connection to the hoisting cable. The construction, location and dimensions of the coupling means depend on the application. Particularly the span "a" of the coupling means will have to be chosen optimally. Figure 6 elucidates in side view and top view of the method the deployment of control means 6. These control means, which are anchored on base frame 1 of the hoisting installation, can be formed by a system of cables or hydraulically operated cylinders or manipulators. The assembly of control elements is laid out such that the object can be pulled or pushed to the erection site and rotated in the required direction. The system is shown in the figure with the use of cables. Control cables βa and 6b are fastened to the object for erecting in the points 10a and 10b and guided to the capstans 12a and 12b via cable pulleys 11a and lib. Cable pulleys 11 and capstans 12 can be mounted on the underside of masts 2 and 3 or directly onto base frame 1.

Claims: CLAIMS 1. Method for erecting bodies of a considerable height by means of a hoisting device, characterized in that in a lying position the body is coupled at an intermediate position to a hoisting cable of the hoisting device controllable by the lifting unit and is lifted by the lifting unit. 2. Method as claimed in claim 1, characterized in that the bottom end of the body for erecting is positioned by means of control means when the body is at least partially raised. 3. Tripod hoisting device for erecting bodies of a considerable height according to the method of claim 1 or 2, comprising a standing tripod, a lifting unit supported by the upper part of the tripod, at least one hoisting cable controllable by the lifting unit and a lying base frame for fixing the position of the tripod. 4. Tripod hoisting device as claimed in claim 3, characterized in that the base frame comprises at least five fixation legs, which fixation legs define in the ground surface two triangles with a common side, and the joint surface area of the two triangles is smaller than the surface area of the triangle defined by the bottom end points of the three legs of the tripod in the ground surface. 5. Tripod hoisting device as claimed in claim 4, characterized in that on the ground surface a foundation for the body is provided which is located outside the two triangles defined by the five fixation legs . 6. Tripod hoisting device as claimed in any of the claims 3-5, characterized in that control means are provided for controlling the position of the body, which control means are preferably coupled on the one side to the base frame and on the other side to the bottom part of the body for erecting. 7. Tripod hoisting device as claimed in any of the claims 3-6, characterized in that the third leg is formed by a telescopic jib on a mobile platform. 8. Tripod hoisting device as claimed in any of the 5 claims 3-7, characterized in that the legs, which are formed from a number of parts, and the other components of the hoisting device have a shape and size suitable for transpor . 9. Tripod hoisting device as claimed in any of the C claims 3-8, characterized in that the lifting unit comprises a hydraulically operating jack. 10. Coupling means for coupling a hoisting cable of a hoisting device as claimed in any of the claims 3-8 in accordance with a method as claimed in claim 1 or 2 , 5 which cable is controllable by the lifting unit. 11. Coupling means as claimed in claim 10, comprising a detachable support frame for supporting the body and a connecting element for connection to the hoisting cable .

Inventors: STOOF PIETER MARIA, STOOF, PIETER, MARIA
Applicants: MAMMOET DECALIFT INT BV, STOOF PIETER MARIA, MAMMOET DECALIFT INTERNATIONAL B.V., STOOF, PIETER, MARIA
Application year: 1998
Main classification: B66C19
IPC codes: B66C5