WO1987005590A1 - Device for shifting a heavy load - Google Patents

Device for shifting a heavy load Download PDF

Info

Publication number
WO1987005590A1
WO1987005590A1 PCT/NL1987/000006 NL8700006W WO8705590A1 WO 1987005590 A1 WO1987005590 A1 WO 1987005590A1 NL 8700006 W NL8700006 W NL 8700006W WO 8705590 A1 WO8705590 A1 WO 8705590A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
pressure block
fixing element
piston
load
Prior art date
Application number
PCT/NL1987/000006
Other languages
French (fr)
Inventor
Wietse Johan Van De Wetering
Original Assignee
Heerema Engineering Service B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heerema Engineering Service B.V. filed Critical Heerema Engineering Service B.V.
Publication of WO1987005590A1 publication Critical patent/WO1987005590A1/en
Priority to DK580787A priority Critical patent/DK580787A/en
Priority to NO874689A priority patent/NO874689D0/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
    • B66F1/08—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being operated by fluid pressure

Definitions

  • the invention relates to a device for shifting a heavy load relative to a support, said device compri ⁇ sing two double-acting hydraulic cylinder-piston combina- tions, each in conjunction with a fixing element which can be fixed relative to the support.
  • the object of the invention is to produce a device of the type referred to in the preamble, with which the operation of two cylinder-piston combinations in tandem is possible without problems.
  • the two cylinder-piston combinations are to this end set apart in line with each other, the piston rods facing each other are connected by their respective ends to a pressure block acting on the load, each of the cylinders is coupled to a detacha ⁇ ble fixing element, and each cylinder is enclosed by a tubular guide part coupled to the pressure block.
  • Each of the cylinders is preferably connected by its free end by means of a hinge coupling to a fixing element disposed in line with the cylinders, resting on a support, and fixable relative thereto.
  • Tubular guide and pressure block are also preferably disposed in such a way that they can rotate relative to the longitudinal axis of the cylinder. This has advantages when a construction part with a length greater than that of the support has to be shif ⁇ ted, to which end over the length of this part several stops for the pressure block are provided. As a result of the above-described measure, the pressure block can, after rotation thereof about the longitudinal axis of the cylinder, pass a stop.
  • Figs, la to Id are schematic illustrations to explain the principle of the invention.
  • Fig. 2 is a side view of a practical embodiment according to the invention.
  • Fig. 3 shows cross sections on an enlarged scale along the lines IIIA-IIIA and IIIB-IIIB in Fig.2.
  • Figs. la-Id show schematically two double- acting hydraulic cylinder-piston combinations 1, 2, each with a piston with piston rod la and 2a respectively and inlets and discharges for the pressure medium lb, lc and 2b, 2c respectively.
  • Each of the cylinders is connected by its closed end by means of a suitable coupling 5, 6 to a fixing element 3, 4, known from the art.
  • the fixing elements 3, 4 are guided over guides 7, 8 and can be fixed relative thereto.
  • An auxiliary fixing element 19 is guided over the guide 20 and can be fixed relative thereto.
  • the guides 7, 8 and 20 are preferably the same.
  • the fixed position is shown sche ⁇ matically in the figures by projecting transverse lines on either side of the fixing elements 3 and 4 and 19.
  • a rigid tube 15 Disposed around the cylinders 1 and 2 is a rigid tube 15, which with the insertion of slide bushes 16 can slide and turn over the outside wall of the cylinders 1 and 2.
  • the pressure block 12 is disposed in such a way that it carries along the tube 15 when there is shifting in the longitudinal direction of the piston rod.
  • the device operates as follows: In the position shown in Fig. la the fixing elements 3 and 4 are fixed, so that when pressure medium is fed in through the inlets lc, 2c the piston rods la, 2a move left in the direction of the arrow 17, and the pressure block 12 takes with it the stop 13, and thus the load to be shifted.
  • Figs. 2 and 3 relate to a practical embodiment, for the case where a very long, heavy load, such as a jacket of a drilling platform, has to be shifted, lying on its side, in the longitudinal direction.
  • a very long, heavy load such as a jacket of a drilling platform
  • Fig. 2 shows a side view of such an arrangement
  • Fig. 3 shows on an enlarged scale a cross section along the lines IIIA-IIIA and IIIB-IIIB in Fig. 2.
  • the first-mentioned cross section is shown in the left half of Fig. 2, and the latter is in the right half of Fig. 3.
  • Part of the jacket is indicated in the figures by the reference number 25; it rests by means of the bearing plates 26, with a wooden support 27 provided between, on a layer of Teflon, which rests on the foun ⁇ dation 28.
  • This foundation 28 has on either side of the jacket guide bars 29, 30 with flanges 29a, 30a. The object of these will now be explained further on.
  • the jacket 25 is provided with a laterally projecting flange with a stop face 41, with which the pressure block 12 engages.
  • the whole construction ope ⁇ rates as described above when the jacket is being shifted.
  • the load must be provided with several stops, which it must, of course, be possible to pass on a return movement from the di ⁇ rection of pushing.
  • the invention provides for this in a very simple manner, by making use of the fact that the tube 15 with piston rods la, 2a and the pres- sure block 12 can rotate round the longitudinal axis of the cylinder, which means that the pressure block 12 can be taken outside the range of the stop 41.
  • the tube 15 is provided with projecting construction plates 42, the end of which is coupled to the piston rod 43 of a hydraulic cylinder 44, which is carried by a guide piece 45 fitting round the flange 30a of the beam 30. Actuating of the cylinder 44 results in the piston rod 43 being withdrawn, with the result that the tube 15 with the pressure block 12 turns anti-clockwise in the direction of the arrow 46 and the pressure block 12 can pass the stop 41.

Abstract

Device for shifting a heavy load relative to a support (27) comprising two double-acting hydraulic cylinder-piston combinations (1, 2). Each cylinder-piston combination (1, 2) cooperates with a fixing element (3, 4) which can be fixed relative to the support (27) and both cylinder-piston combinations (1, 2) are set apart in line with each other, the ends of the respective piston rods (1a, 2a) being connected with a pressure block (12) acting upon the load (13, 25). Each of the cylinders (1, 2) is coupled to a detachable fixing element (3, 4) while each cylinder is enclosed by a tubular guide part (15) coupled to the pressure block (12). Thus tilting of the pressure block (12) is prevented while transfers forces are absorbed by the tubular guide part (15) and the cylinder walls.

Description

Device for shifting a heavy load.
The invention relates to a device for shifting a heavy load relative to a support, said device compri¬ sing two double-acting hydraulic cylinder-piston combina- tions, each in conjunction with a fixing element which can be fixed relative to the support.
Such a device is known from US Patent 4,506,807. This known device can, of course, be used only if the load is sufficiently wide. In many cases, it would be useful if two individual sets of hydraulic cylinder- piston combinations and fixing element in tandem could act on a load by means of a pressure block. The problem here is, however, that the guide of the piston rod of a hydraulic cylinder cannot absorb transverse forces, so that such a configuration can work only so long as the respective cylinders and piston rods are perfect¬ ly in line. However, this condition is not met in prac¬ tice.
The object of the invention is to produce a device of the type referred to in the preamble, with which the operation of two cylinder-piston combinations in tandem is possible without problems. According to the invention, the two cylinder-piston combinations are to this end set apart in line with each other, the piston rods facing each other are connected by their respective ends to a pressure block acting on the load, each of the cylinders is coupled to a detacha¬ ble fixing element, and each cylinder is enclosed by a tubular guide part coupled to the pressure block. Z
With a simple design, tilting of the pressure block is prevented, and the transverse forces occurring during operation are absorbed by the tubular guide part and the cylinder walls. Each of the cylinders is preferably connected by its free end by means of a hinge coupling to a fixing element disposed in line with the cylinders, resting on a support, and fixable relative thereto.
Tubular guide and pressure block are also preferably disposed in such a way that they can rotate relative to the longitudinal axis of the cylinder. This has advantages when a construction part with a length greater than that of the support has to be shif¬ ted, to which end over the length of this part several stops for the pressure block are provided. As a result of the above-described measure, the pressure block can, after rotation thereof about the longitudinal axis of the cylinder, pass a stop.
In particular in the shifting of very, long construction parts, such as placing the jacket of a drilling platform on board a barge and launching a drilling platform, great problems are encountered in practice, because with the known devices insufficient control can be exerted over the jacket to be shifted, in particular when it is projecting beyond the barge at both sides. In such cases advantageous use can be made of a device according to the invention, through use of an oblongshaped support, having on at least one side a guide track for guiding the cylinder-fixing element combinations, while the load is provided with at least one laterally projecting stop for the pressure block.
It is pointed out that the above-mentioned US Patent 4,506,807 discloses a cylinder-piston com- bination with a cylinder divided by a transverse parti¬ tion and two standard cylinders disposed on a common piston rod. The object of the invention, on the other hand, is to make use of the double-acting cylinder- piston combinations which are obtainable in any desired capacity.
The invention is explained with reference to the drawing.
Figs, la to Id are schematic illustrations to explain the principle of the invention.
Fig. 2 is a side view of a practical embodiment according to the invention. Fig. 3 shows cross sections on an enlarged scale along the lines IIIA-IIIA and IIIB-IIIB in Fig.2.
Figs. la-Id show schematically two double- acting hydraulic cylinder-piston combinations 1, 2, each with a piston with piston rod la and 2a respectively and inlets and discharges for the pressure medium lb, lc and 2b, 2c respectively. Each of the cylinders is connected by its closed end by means of a suitable coupling 5, 6 to a fixing element 3, 4, known from the art. The fixing elements 3, 4 are guided over guides 7, 8 and can be fixed relative thereto. An auxiliary fixing element 19 is guided over the guide 20 and can be fixed relative thereto. The guides 7, 8 and 20 are preferably the same. The fixed position is shown sche¬ matically in the figures by projecting transverse lines on either side of the fixing elements 3 and 4 and 19.
The free ends of the piston rods la, 2a are coupled by means of suitable hinge couplings 10 and 11 to a pressure block 12, which acts upon the schema¬ tically shown stop 13 of a load to be shifted, which is not shown.
Disposed around the cylinders 1 and 2 is a rigid tube 15, which with the insertion of slide bushes 16 can slide and turn over the outside wall of the cylinders 1 and 2. The pressure block 12 is disposed in such a way that it carries along the tube 15 when there is shifting in the longitudinal direction of the piston rod. The device operates as follows: In the position shown in Fig. la the fixing elements 3 and 4 are fixed, so that when pressure medium is fed in through the inlets lc, 2c the piston rods la, 2a move left in the direction of the arrow 17, and the pressure block 12 takes with it the stop 13, and thus the load to be shifted.
In the end the situation shown in Fig. lb is reached, in which the two piston roads la and 2a
10 have completed their stroke, and the load 13 is shifted over the length of this stroke.
As Fig. lc shows, the auxiliary fixing element 19 is then fixed, and the fixing elements 3 and 4 are released, after which through infeed of pressure medium
13 through the inlets lb and 2b the cylinders 1 and 2 are moved over the stroke length to the left in the direction of the arrow, taking with them the fixing elements 3 and 4. The pressure block 12, the load with stop 13, and the sleeve 15 remain in their place.
2-u- After that, the fixing elements 3 and 4 are locked in their new position, and the fixing element 19 is released, so that in the end the position shown in Fig. Id is produced, corresponding to the position shown in Fig. la . A new cycle can now begin.
" Figs. 2 and 3 relate to a practical embodiment, for the case where a very long, heavy load, such as a jacket of a drilling platform, has to be shifted, lying on its side, in the longitudinal direction. When such jackets are very long (of the order of magnitude
TO of 200 to 500 metres), considerable problems occur, both when the jacket is being placed on the barge by means of which it is to be carried to the sinking place, and when the jacket is being lowered into the water from the barge, because, since the jacket is projecting 5 beyond the limitsof the barge, there are no possibilities for fitting pushing elements behind the jacket. In this case, it can be advantageous to use the device according to the inventions, which is fitted in a suitable arrangement under the load to be shifted, i.e. the jacket. Fig. 2 shows a side view of such an arrangement, and Fig. 3 shows on an enlarged scale a cross section along the lines IIIA-IIIA and IIIB-IIIB in Fig. 2. The first-mentioned cross section is shown in the left half of Fig. 2, and the latter is in the right half of Fig. 3.
Part of the jacket is indicated in the figures by the reference number 25; it rests by means of the bearing plates 26, with a wooden support 27 provided between, on a layer of Teflon, which rests on the foun¬ dation 28. This foundation 28 has on either side of the jacket guide bars 29, 30 with flanges 29a, 30a. The object of these will now be explained further on.
Parts corresponding to parts already indicated in Figs. la-Id are indicated by the same reference numbers in Figs. 2 and 3. These figures thus show the two cylinder-piston combinations 1, 2, the piston rods la, 2a, the pressure block 12, the sleeve 15, and the couplings 5, 6 with the fixing elements 3 and 4. The latter, indicated in practice as "gripper jaws", as shown in Fig. 3 in particular, is made up of C-shaped side parts 35a, 35b, having enclosed between them a top pressure plate 36, a number of short hydraulic jacks 37, and a bottom pressure plate 38. Since the C-shaped side parts 35a, 35b engage around the bottom edge of the flange 29a, when the jacks 37 expand the entire gripper jaw is locked relative to the bar 29. Such a construction is known in practice and is not a subject of the present application. The jacket 25 is provided with a laterally projecting flange with a stop face 41, with which the pressure block 12 engages. The whole construction ope¬ rates as described above when the jacket is being shifted. Where the length of the load to be shifted is geater than the distance over which the device accor¬ ding to the invention can be shifted, the load must be provided with several stops, which it must, of course, be possible to pass on a return movement from the di¬ rection of pushing. The invention provides for this in a very simple manner, by making use of the fact that the tube 15 with piston rods la, 2a and the pres- sure block 12 can rotate round the longitudinal axis of the cylinder, which means that the pressure block 12 can be taken outside the range of the stop 41. For this purpose, as the left half of Fig. 3 shows, the tube 15 is provided with projecting construction plates 42, the end of which is coupled to the piston rod 43 of a hydraulic cylinder 44, which is carried by a guide piece 45 fitting round the flange 30a of the beam 30. Actuating of the cylinder 44 results in the piston rod 43 being withdrawn, with the result that the tube 15 with the pressure block 12 turns anti-clockwise in the direction of the arrow 46 and the pressure block 12 can pass the stop 41.

Claims

CLAIMS 1. Device for shifting a heavy load relative to a sup¬ port (27), said device comprising two double-acting hydraulic cylinder-piston combinations (1, 2), each in conjunction with a fixing element (3, 4) which can be fixed relative to the support (27), charac¬ terized in that the two double-acting hydraulic cylinder-piston combinations (1, 2) are set apart in line with each other, the piston rods (la, 2a) facing each other are connected by their respective ends to a pressure block (12) acting on the load (13, 25), each of the cylinders is coupled to a detachable fixing element (3, 4), and each cylinder (1, 2) is enclosed by a tubular guide part (15) coupled to the pressure block (12). 2. Device according to Claim 1, characterized in that each of the cylinders (1,
2) is connected by its closed end by means of a hinge coupling (5, 6) to a fixing element (3, 4) disposed in line with the cylinders, resting on a support (7, 8) and fixable relative thereto.
3. Device according to Claim 1 or 2, characterized in that tubular guide (15) and pressure block (12) are rotatable relative to the longitudinal axis of the cylinder (1, 2).
4. Device intended for shifting in the longitudinal direction an oblong-shaped heavy load, such as a jacket (25) of a drilling platform, using a device according to Claims 1 to 3, characterized by an oblong-shaped support (27) having on at least one side a guide track (29, 30) for guiding the cylinder- fixing element combinations (1, 2, 3, 4), while the load (25) is provided with at least one stop (41), laterally projecting therefrom, for the pressure block (12).
PCT/NL1987/000006 1986-03-11 1987-03-10 Device for shifting a heavy load WO1987005590A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK580787A DK580787A (en) 1986-03-11 1987-11-05 MECHANISM FOR HANDLING A LARGE ITEM
NO874689A NO874689D0 (en) 1986-03-11 1987-11-11 DEVICE FOR MOVING DIFFERENT OBJECTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8600632 1986-03-11
NL8600632A NL8600632A (en) 1986-03-11 1986-03-11 DEVICE FOR MOVING A HEAVY LOAD.

Publications (1)

Publication Number Publication Date
WO1987005590A1 true WO1987005590A1 (en) 1987-09-24

Family

ID=19847698

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1987/000006 WO1987005590A1 (en) 1986-03-11 1987-03-10 Device for shifting a heavy load

Country Status (4)

Country Link
JP (1) JPS63502983A (en)
GB (1) GB2194503A (en)
NL (1) NL8600632A (en)
WO (1) WO1987005590A1 (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992812A (en) * 1958-05-01 1961-07-18 De Long Corp Jacking mechanism and controls
GB1107010A (en) * 1966-12-06 1968-03-20 Hydraulic Engineers Inc Jack arrangement for a platform structure
GB1309232A (en) * 1969-03-14 1973-03-07 Press W & Son Ltd Rope pulling apparatus
US3994475A (en) * 1976-04-02 1976-11-30 Hydranautics Rack type jacking apparatus
US4007915A (en) * 1975-12-15 1977-02-15 Hydranautics Jacking apparatus
GB2003448A (en) * 1977-08-30 1979-03-14 Mac Gregor International Sa Skidding device for attachment to a girder
US4212450A (en) * 1978-08-25 1980-07-15 Santa Fe International Corporation Jacking apparatus
NL8003239A (en) * 1980-06-03 1982-01-04 Herbert Jan Schurink Linear hydraulic indexing motor - has locking mechanism with two sets of opposed arms and hinge spindle locked by ram
GB2153316A (en) * 1984-01-24 1985-08-21 Bauakademie Ddr Pressurised-fluid operated cable transport apparatus
US4572481A (en) * 1981-10-14 1986-02-25 Chambers Henry B Releasable clamping assembly for use with hydraulic jacking apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992812A (en) * 1958-05-01 1961-07-18 De Long Corp Jacking mechanism and controls
GB1107010A (en) * 1966-12-06 1968-03-20 Hydraulic Engineers Inc Jack arrangement for a platform structure
GB1309232A (en) * 1969-03-14 1973-03-07 Press W & Son Ltd Rope pulling apparatus
US4007915A (en) * 1975-12-15 1977-02-15 Hydranautics Jacking apparatus
US3994475A (en) * 1976-04-02 1976-11-30 Hydranautics Rack type jacking apparatus
GB2003448A (en) * 1977-08-30 1979-03-14 Mac Gregor International Sa Skidding device for attachment to a girder
US4212450A (en) * 1978-08-25 1980-07-15 Santa Fe International Corporation Jacking apparatus
NL8003239A (en) * 1980-06-03 1982-01-04 Herbert Jan Schurink Linear hydraulic indexing motor - has locking mechanism with two sets of opposed arms and hinge spindle locked by ram
US4572481A (en) * 1981-10-14 1986-02-25 Chambers Henry B Releasable clamping assembly for use with hydraulic jacking apparatus
GB2153316A (en) * 1984-01-24 1985-08-21 Bauakademie Ddr Pressurised-fluid operated cable transport apparatus

Also Published As

Publication number Publication date
JPS63502983A (en) 1988-11-02
GB2194503A (en) 1988-03-09
GB8724595D0 (en) 1987-11-25
NL8600632A (en) 1987-10-01

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