CN105705703A - Lifting device with a dimensionally stable clamping element - Google Patents
Lifting device with a dimensionally stable clamping element Download PDFInfo
- Publication number
- CN105705703A CN105705703A CN201480060306.4A CN201480060306A CN105705703A CN 105705703 A CN105705703 A CN 105705703A CN 201480060306 A CN201480060306 A CN 201480060306A CN 105705703 A CN105705703 A CN 105705703A
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- China
- Prior art keywords
- clamping
- clamping element
- spud leg
- face
- structure body
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
- E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
- E02B17/0854—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with clamping wedges, eccentric clamping devices and so on
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/06—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for immobilising, e.g. using wedges or clamping rings
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
- E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0052—Removal or dismantling of offshore structures from their offshore location
Abstract
An apparatus for clamping a device (3) to an elongate body (2) extending in a longitudinal direction (L), which apparatus is displaceable to and fro along a longitudinal extent of the elongate body and is provided with a self-locking mechanism which comprises at least one clamping element (20) which is pivotable about an associated axis of rotation (21) between at least one clamping position and a neutral position, wherein the at least one clamping element (20) has an arm running away from the axis of rotation (21) thereof, with at least one clamping surface (22, 23) arranged at an arm end facing away from the axis of rotation (21), and the at least one clamping surface (22, 23) has the same relative position with respect to the arm in the at least one clamping position and in the neutral position and in each position along the pivoting movement.
Description
Technical field
The present invention relates to a kind of for device on the elongate structure body extended longitudinally that equipment is clamping, described device can reciprocate along the longitudinal extension of elongate structure body, and equipped with self-locking mechanism, described self-locking mechanism includes being centered around rotating at least one clamping element (Klemmelemente) of rotating shaft corresponding between clip position and centre position。The invention still further relates to the method for mounting and dismounting offshore set-up。
Background technology
For moving the device of equipment along elongate structure body, the form with jacking equipment being particularly well known exists, and for the device of offshore set-up。Offshore set-up such as platform is built into seabed by jacking equipment, and it includes at least one spud leg。
In the region that to build in ocean by offshore platform predetermined。In this region, spud leg is carefully reduced to by jacking equipment on seabed or prepackage pedestal, and be fixed on seabed or prepackage pedestal at spud leg after, by same or another jacking equipment, platform floating in the seawater is raised to be higher than the operation height of sea beat。
When platform reaches operation height by jacking equipment, then described platform is fixed there。
United States Patent (USP) 2775869 discloses a kind of Pneumatic elevation equipment。And disclose following feature, each spud leg is had to dynamic expansion of two aerofluxuss being wound around and clamp pipeline。Stacked clamping pipeline links together each other by pneumatically-operated pneumatic spring。Disadvantageously, when air pressure supply is broken down, clamping action can weaken, and spud leg clamps landing pipeline from the expansion being wound around。
A kind of described in United States Patent (USP) 2,841.961 have two row foldings being coiled on spud leg and hold the jacking equipment of footwear (Greifschuhen)。Clamping footwear include the teeth portion towards spud leg wall, and described teeth portion is squeezed in wall material in a tensioned state, and shortcoming can be damaged。The shortcoming of the clamping device of United States Patent (USP) 2,841.961 is, is difficult to be fabricated along the big footwear of form fit set by the periphery of spud leg。Furthermore, it is necessary to the mechanism's manipulation clamping device with power consumption of complexity。
United States Patent (USP) 2822670 relates to a kind of lowering or hoisting gear with an engaging mechanism。In this case, locking bolt is inserted into the recess of the wall of spud leg, and is supported on the weight on locking bolt。Shortcoming is, on the one hand, spud leg is necessarily perforated, in order to is uniformly arranged locking bolt in whole moveable length, thus weakens stability, on the other hand, is determined the size of lifting step by the spacing of recess, in addition can not accurately adjust。
A kind of jacking equipment is illustrated by United States Patent (USP) 4002038, it clamping element including having annular segments shape, is maintained the position of described clamping element by the leaf spring being supported in pin member。Clamping element is arranged in the guide portion that can do half circular motion。The shortcoming of this mechanism is, by leaf spring maintenance position is uncertain。
European patent EP 0030540 relates to a kind of grasping system, and it is for being clamped in the platform at the ribbon structure place of spud leg。Two pairs of oval clamping elements in the opposite direction apply clamping action。The clamping element of every pair is connected to each other by cylinder, and produces clamping action by straining every pair of clamping element。Shortcoming is, this system needs for clamping cylinder。Other disadvantage is that, this system is unsuitable for along spud leg mobile platform。This invention is limited to this document。
United States Patent (USP) 3396945 describes a kind of jacking equipment, and it is for the ribbon structure mobile platform along spud leg。Clamping element has chamfered edgeOuter surface, the inner surface one of the chamfered edge of described outer surface and housing works and plays clamping effect。Shortcoming is, the outer surface of chamfered edge and the slip (Aufeinandergleite) that overlaps each other of inner surface are associated with the strong load of material。
Summary of the invention
Therefore, it is an object of the invention to provide the equipment of a kind of the above-mentioned type, it has higher processing safety, and provides a kind of method, and it makes installation and removal offshore set-up be easier to。
The said equipment passing through to have the feature of claim 1 is solved by the purpose of the present invention。
Preferably, said apparatus for chucking device is jacking equipment, and it is spud leg in described elongate structure body, preferably, for having the spud leg of circular cross-section, and it is offshore set-up in the apparatus, preferably, one or more for having, it is preferable that there is the offshore platform of three, four or multiple spud leg。
Preferably, at least one clamping element is configured to have particularly advantageous structure。Clamping element has by rotating the outward extending arm of axle, described arm has at the clamping face arranged back to the arm end rotating axle, preferably, for flat or bending clamping face, wherein, clamping face in clip position and centre position, and along the clamping face rotating movement, there is the relative position same relative to arm。
Clamping face has the contact point or region that contact with elongate structure body。Elongate structure body has outer surface, it is preferable that it is without curvature ground along a direction of two surface direction。Such as, the tubbiness outer surface of spud leg is configured to the longitudinal direction along spud leg for without curvature。Equally, flat clamping face be configured to along described surface direction a direction without curvature ground, wherein, the outer surface without curvature direction and elongate structure body of clamping face in clip position, overlap (zusammenfallen) without curvature direction。So, the power that the elongate structure body in clip position applies is distributed on bigger area, thus protecting elongate structure body。
Because clamping element is respectively provided with only single rotation axle, and advantageously, described device can realize simple manipulation。
Especially, the device installed on elongate structure body, without further repacking, can be not only used for reducing elongate structure body, preferably, spud leg is reduced to seabed by offshore platform, it is also possible in lifting means, preferably, along elongate structure body, operation planar is promoted to podium level。
At this, the concept of clamping generally can be regarded as。Clamping includes the clamping action on clamping face by the coating (Belege) increasing friction, such as elastomer, and from known brake and adapter to the friction material being connected with synthetic resin, it may also be sawtooth on existing clamping face, teeth portion and tooth row, they can penetrate the outer wall of elongate structure body。
Clip position is construed as the angle position of clamping element, the clamping face of level and the wall contacts of elongate structure body belonging in clip position and be provided with auto-lock function。Centre position is construed as the angle position of clamping element, and in centre position, clamping element includes, and particularly includes at least one clamping face, and it does not directly contact with the outer wall of elongate structure body。Clip position can also change according to the weight of equipment or in the angular range set, and centre position can also include an angular range。Clamping element can include one, two or more clamping faces, and preferably, each clamping face specifies a clip position。
Preferably, arm dimensionally stable ground structure the rotating between axle and at least one clamping face of described clamping element at described arm of at least one clamping element described。Herein relate to a kind of embodiment being particularly disadvantageous for safeguarding of the present invention。
At least one clamping face in the rotational motion process of center, enters center from clip position by it, it is preferable that the rotation curve of the back-end region that the radius ratio rotating curve of front end area has at least one clamping face is little。
The different point of clamping element and parts generally depict different rotation curves in rotational motion process。Especially, the radius of gyration with different-diameter is depicted along the point of clamping face。Preferably, if from the central position to clip position rotational motion, the radius of gyration increase in the region of clamping face is more big, and the region of the clamping face of rotational motion subsequently is more big。Arranged relative to the geometry rotating axle by this clamping face, it is possible to realize simple self-locking by reducing clamping cross section。
Preferably, the central point at the clamping face of clip position is kept at a distance with rotating axle, and described clamping face is parallel to around the clamping face of quarter butt and is perpendicular to the clamping face around stock。The ratio of quarter butt is met friction (static friction) coefficient at least between the outer wall of clamping face and elongate structure body by stock。From external action gravity on clamping element, it produces chucking power by leverage of stock and short thick stick, and described chucking power acts on elongate structure body, wherein, and the suitable stock of ratio of gravity and chucking power and the ratio of short thick stick。Because frictional force at least corresponds to chucking power and is multiplied by coefficient of friction, occurring in that inhibitory action in lever ratio, described lever ratio is equivalent to coefficient of friction。
Advantageously, described self-locking mechanism can suppress reciprocating of the equipment along elongate structure body。Preferably, each clamping element is corresponding two self-locking mechanisms, and moves according to the suppression or travelling backwards that are set in given time point。
Preferably, at least one clamping element is except there being a clamping face to also have another clamping face。Preferably, clamping face and another clamping face are that symmetry is oppositely arranged。Advantageously, clamping element includes a cross section in rotational plane, and described cross section has along cross section clamping face at an angle positioned opposite to each other, and described clamping face is spaced apart by area of isolation。
Advantageously, it is likely to so that producing clamping action along two moving directions of elongate structure body by constructing two clamping faces, and thus, forms double; two self-locking mechanism in a particularly simple way。At construction device as when promoting with lowering means, when particularly building as lowering or hoisting gear, both can implement decline spud leg can also implement to promote platform, without the device reconstructed at spud leg place, or without other independent descending systems in hydraulic lifting (Litzenheber)/descending system。Area of isolation corresponds to centre position。If area of isolation is directed parallel to longitudinal direction, namely operationally, being directly opposite to the outer wall of elongate structure body, clamping element does not directly contact with elongate structure body, and will not produce clamping action。According to clamping element rotate moving axis rotate rotation direction, clamping face is formed with elongate structure body in clamping action or another clamping face and forms another clamping action with elongate structure body, and clamping action stop elongate structure body the longitudinal direction according to the present invention and with longitudinally opposed direction sliding。
Clamping element can be designed as different forms。At least one clamping face can integrally be connected with respective arm。Preferably, at least one clamping face includes guide portion, embeds at least one clamping and build block (Klemmbaustein) in described guide portion。The clamping of described guide portion builds block and builds at least one clamping face。Guide portion can embed one, two, three or be likely to more clamping structure block。Guide portion is without being completely filled。Advantageously, single clamping builds block and can be separately fixed at guide portion。The size changing clamping face of number of block is built along with change according to clamping, and thus, the size of clamping face and thus each the power applied can be adjusted on the outer wall of elongate structure body。Especially, single clamping structure block is fixed in diverse location along guide portion。Additionally, the clamping structure block in the outside upper setting of vertical connection lines produces weak chucking power at the outer wall of elongate structure body, described vertical connection lines rotating between axle and the outer wall of elongate structure body at clamping element。Thus, block adjustable chucking power is built by clamping mobile in guide portion。
In different embodiments of the invention, clamping element is arranged differently than around elongate structure body。
Preferably, described clamping element is disposed around holder in the holder (Klemmglieder) of the continuous clamping chain that elongate structure body is arranged。It is therefore preferred that clamping element group (Klemmgliedergruppen) is disposed around around elongate structure body, and preferably, adjacent holder is mutually hinged by long connecting plate。Advantageously, long connecting plate and the outer wall of elongate structure body are operationally not in contact with。Preferably, connecting plate is straight。Holder self can have single box, and described box is mutually hinged again by short connecting plate。It is therefore preferred that short and long connecting plate is arranged on the side face along elongate structure body, and each it is tangential to side face。
Advantageously, self-locking mechanism includes the holder that can arrange around elongate structure body, each holder has at least one clamping element, at least one of which clamping element can rotate around the respective rotation axle of described clamping element relative to holder, and defines the clamping cross section of the variable dimension around elongate structure body。Holder can be respectively configured to the box of one, two, three or more, and including the clamping element that self superposition of more longitudinal directions is arranged, preferably, described clamping element is connected to each other by adjusting rod and each box, and described adjusting rod can the clamping element of damper box simultaneously。
Especially, adjusting rod may be adjusted by the clamping element of its triggering, in order to produces initial lock。Forming self-locking by the chucking power occurred after initial lock, wherein, described chucking power is strengthened under the gravity self-acting of equipment。
In a particularly preferred embodiment of the present invention, clamping element is arranged at least two clamping element group, and these two clamping element groups may move relative to each other along elongate structure body, and, each clamping element group forms an independent self-lock mechanism。
This embodiment makes two clamping element groups can longitudinally and move forward with longitudinally opposed direction in drop-down step。
In one embodiment of the invention, clamping element group is set to fix relative to platform relative position, and, another clamping element group is designed to be moved relative to platform by hydraulic cylinder liquid driven cylinder。So the drop-down step between two clamping element groups is achieved。It is contemplated that two clamping element groups are connected to each other directly by hydraulic cylinder liquid driven cylinder or another clamping element group is directly connected by hydraulic cylinder liquid driven cylinder with platform。
Clamping element group can be designed as multi-form。Preferably, the holder of a group can design as clamping chain。Preferably, two clamping chains are set, its longitudinally arranging to superposition up and down at spud leg so that the decline of the rising of platform and the decline of platform and spud leg and rising are possibly realized in drop-down step。In addition, it also is suitable as grasping system according to assembly of the invention so that platform is for good and all in operating position。Without be used for operating other or additional fixation because may insure that operation safety by self-locking according to assembly of the invention in clamp position。Additionally, on each spud leg, due to the dual setting of clamping chain, it is achieved that redundancy。
In another embodiment of the invention, clamping element group is not designed as the clamping chain around elongate structure body, preferably, clamping chain around spud leg, but, holder designs as U shape profile shape, and has the clamping element being oppositely arranged in the inside of U shape profile, and the ribbon structure being fixedly installed on elongate structure body place can be directed between described clamping element。The holder of clamping element group can be oppositely arranged on the respective ribbon structure at spud leg place, or around spud leg at multiple ribbon structure places。The holder of clamping element group is not joined directly together each other, but they apply clamping action together。
Advantageously, arranging at least one baffle plate (Anschlag) for clamping element, described baffle plate stops clamping element being turned out through clip position in rotation direction。Therefore, the security feature of described device is herein related to。
Preferably, teeth portion is arranged on clamping face, and described teeth portion engages with the outer surface of elongate structure body, and promotes clamping effect。It is also contemplated that clamping face uses has the elastomer layer strengthening friction, with the known friction material for braking and connect being made up of artificial resin
About described method, the method passing through to install offshore set-up is solved by this task, and described offshore set-up includes platform and has at least one spud leg, and said apparatus has at least two groups, it is preferable that for the clamping element group of just two groups。Described device is mounted around at least one spud leg, and alternately, the clamping face of the clamping element of two groups of clamping element groups applies clamping action at spud leg place。By this way, in drop-down step, spud leg is declined towards with longitudinally opposed direction by device。According to the present invention, the clamping element of two groups of clamping element groups rotates through their centre position, and subsequently alternately, another clamping face of the clamping element of two groups of clamping element groups applies clamping action at spud leg place, and platform is promoted to operation height longitudinally。Preferably, it is possible to save and re-assembly step, particularly save and open and be again switched off one or two clamping chain。
Preferably, platform is being operated height by described device by for good and all clamping。Therefore, it can to save the additional girth member for permanent reinforcement platform, such as bolt etc., because self-locking device safe enough so that platform is maintained on operation height for a long time。
In another embodiment of the present invention, use the device for promoting platform, and platform is promoted to operation height, be permanently affixed at spud leg place at this by another girth member。
About described method, this task is solved by unloading the method for offshore set-up, described offshore set-up has platform and at least one spud leg, described device has at least two groups, it is preferably the clamping element group of just two groups, realize in the following way, alternately, another clamping face of the clamping element of two groups of clamping element groups applies clamping action at least one spud leg place, and so, in drop-down step, spud leg drops to sea level by device towards with longitudinally opposed direction, described clamping element rotates through their centre position, and subsequently alternately, the clamping face of the clamping element of two groups of clamping element groups applies clamping action at spud leg place, and at least one spud leg is longitudinally packed up。
Advantageously, can saving the repacking step of device when installing and uninstalling, because preferably, when changing spud leg or platform relative to the relative motion in seabed, keep the direction of relative movement between spud leg and platform, all clamping elements are rotated by respective centre position。
Accompanying drawing explanation
The present invention will be described by multiple embodiments with reference to 13 width accompanying drawings。
It is shown in which:
Fig. 1 is the perspective view of the jacking equipment according to the present invention,
Fig. 2 is the sectional view along II/II line in FIG,
Fig. 3 is the perspective view of the clamping element according to the present invention,
Fig. 4 is the second embodiment of the lowering or hoisting gear according to the present invention,
Fig. 5 is the perspective view of the holder in Fig. 4,
Fig. 6 a is the side view of the first clamping element in centre position,
Fig. 6 b is the side view of the first clamping element in Fig. 6 a at another clip position,
Fig. 7 a is the perspective view of the second clamping element,
Fig. 7 b, 7c and 7d are the perspective views that each clamping face just has that a clamping builds the second clamping element of block,
Fig. 8 is the side view of the 3rd clamping element at free position,
Fig. 9 is the side view of the 3rd clamping element at clip position。
Detailed description of the invention
Fig. 1 illustrates the basic structure of lowering or hoisting gear 1 of the present invention。Figure 1 illustrates and there is at least three, it is preferred to the offshore set-up of in four spud legs 2 and platform 3。Platform 3 does not illustrate its whole expanded range, but only illustrates the elongated area around spud leg 2。Offshore set-up can be floating, and offshore set-up will move to the preset range at sea carrying out installing together with the spud leg 2 being driven high。It is also contemplated that offshore set-up is not floatable, and it is placed on barge。
Jacking equipment 1 includes clamping chain 4 and another clamping chain 6。Two clamping chains (4,6) substantially construct identical。Spud leg 2 can move reciprocatingly at longitudinal L relative to platform 3。Spud leg is through the opening in platform 3, down or up by jacking equipment 1。Jacking equipment 1 promotes platform 3 along spud leg 2 raising and lowering built up。
In order to install, first, the spud leg 2 being pulled upwardly drops by under jacking equipment seaward。Seabed can be prepared in advance。The spud leg 2 declined can directly drop to seabed, or is placed in advance on the base that seabed is installed。Also a common lower bulk can be fixed at spud leg 2 place。Then pass through jacking equipment 1 to lift from marine at marine floating platform 3, and rise to operation height along spud leg 2, and be permanently affixed at spud leg 2 place at operation height。
In the drop-down step of two clamping chains (4,6), the lowering or hoisting gear 1 along spud leg 2 moves in the both direction along longitudinal L。The movement of jacking equipment 1 is towards deviating from the direction in seabed along leg 2 from marine lifting platform 3, described motion is carried out as follows: first, clamping chain 4 by clamping at spud leg 2 place, another clamping chain 6 is released at spud leg 2 place, and the hydraulic cylinder 7 arranged between two clamping chains (4,6) is pulled up, and thus, platform 3 is elevated along with the rising of hydraulic cylinder 7。Then, another clamping chain 6 is clamping at spud leg 2 place。Clamping chain 4 is released, and the hydraulic cylinder 7 arranged between two clamping chains (4,6) stretches (ausgefahren)。Thus, clamping chain 4 moves up along spud leg 2, and continues up a position, that is, continuation is again clamping at spud leg 2 place away from seabed, and then clamping chain 6 is released, hydraulic cylinder 7 shrinks, and thus, platform 3 forms elevated one section further with hydraulic cylinder again。So, in drop-down step, platform 3 is pulled up to operation height along spud leg 2 from marine。Correspondingly, platform 3 is lowered by, in the corresponding way, it is also possible to first by lowering or hoisting gear 1, the spud leg 2 of offshore set-up pull-up and unanchored offshore set-up is dropped to seabed through the opening of platform 3 from top to bottom。
Two clamping chains (4,6) of jacking equipment 1 substantially construct identical。At this, remote apart from seabed more than clamping chain 6 apart from seabed at the clamping chain 4 at clamping leg 2 place in operation。Each in two clamping chains (4,6) includes multiple holder 10, and they are to be parallel to the form arrangement being arranged side by side each other, it is possible to constitute the box 11 being arranged around along leg 2。
The box 11 being directly arranged side by side of each holder 10 is mutually hinged by short and straight connecting plate 12。The holder 10 being directly arranged side by side is mutually hinged by straight around spud leg 2 at circumferencial direction and long connecting plate 13。Long connecting plate 13 is longer than long connecting plate 12。Two clamping chains (4,6) in longitudinal directionl and be in reverse on the direction of L can relative movement。Holder 10 at longitudinal L two clamping chains (4,6) being just oppositely arranged connects pairs by hydraulic cylinder 7。
Box 11 substantially constructs identical, in fig. 2 the sectional view of a visible box 11。In longitudinal directionl, along each box 11, multiple rotating clamping element 20 is set around each autorotation axle 21。Rotate axle 21 to fix relative to box 11 position, and thus position is fixedly provided in corresponding clamping chain (4,6) place。Rotate axle 21 and be tangential to the outer wall of spud leg 2。Clamping element 20 passes through the radial direction of box 11 from interior survey extending, so that the wall contacts of clamping element and spud leg 2。In outside, fixing hole portion 26 from box 11 for short or long connecting plate 12,13 extending。" inside " is directed substantially toward the direction towards spud leg 2, and " outside " is directed substantially toward the direction away from spud leg 2。Side along the circumferential direction, the clamping element 20 of box 11 is all connected with adjusting rod unshowned, vertically disposed, and described adjusting rod makes the clamping element 20 of box 11 be adjusted simultaneously, and makees as a whole to be adjusted in the same direction。Box 11 has roller 25 in inner side, and it guarantees that box 11 is minimum range to the outer wall of spud leg 2。Especially, roller 25 also makes two clamping chains (4,6) arranged around spud leg 2 be tightened up in the centre position of clamping element 20, however longitudinally still may move。
Fig. 3 illustrates the perspective view of one of them of the clamping element 20 that the structure in Fig. 2 is identical。But, the groove for rotating axle 21 rotation is not shown in figure 3。Clamping element 20 is generally fan-shaped, has circular front end, rotates axle 21 (not shown) by front end guidance。The inner peripheral surface (Innenumfang) of clamping element 20, it towards spud leg 2, has three flat and at an angle to each other faces when operation。Clamping face 22 and another clamping face 23 be respectively provided with level in, be transversely to the machine direction the teeth portion (22a, 23a) of L。Arranging a flat interval region 24 between two clamping faces (22,23), it does not include teeth portion, and is designed as smooth。
With reference to Fig. 2, the function of clamping element 20 is described。First, two clamping chains (4,6) are tightened up around spud leg 2。At this, it is preferable that each space of two clamping chains (4,6) is compacted, to realize the clamping action of two clamping chains (4,6) need to applied after a while according to function。After two clamping chains (4,6) are tightened up, the roller 25 of each box 11 is under the power effect of the outer wall of spud leg 2。But when clamping element 20 mediates, two clamping chains (4,6) in longitudinal directionl can back and forth movement。
In flat interval region 24 centre position shown in figure 2 not with the wall contacts of spud leg 2, and be to maintain outer wall one certain distance with spud leg 2, about 2mm to 4mm。In centre position, the interval region 24 of the outer wall of spud leg 2 is directly oppositely arranged。In centre position, corresponding clamping chain (4,6) is moved along spud leg 2。
In order to make clamping element 20 can be rotated motion by the traction at box 11 place, and thus produce chucking power FN, it is necessary to first realize the initial clamping action of the clamping element 20 at outer wall place at spud leg 2。This clamping element 20 is produced from centre position。Initial clamping action is realized by mobile unshowned adjusting rod, and first described adjusting rod makes clamping element 20 rotate counterclockwise and leave centre position, until producing contact between another clamping face 23 and outer wall of spud leg 2 for each clamping element 20。Owing to initial clamping action is for the further relative movement of spud leg 2 of clamping element 20, guide clamping element 20 continue do the rotational motion hindered by frictional force, until arriving the clip position estimated, at the defined chucking power F in described positionNIt is applied on spud leg 2。Defined chucking power FNDetermined by structural texture。Pull strength follow-up act on lower section hydraulic cylinder 7 place time, initial clamping action prevents two clamping elements (4,6) from sliding along the outer wall of spud leg 2, and actual triggering self-locking action。
When after initial clamping action, when pull strength in longitudinal directionl acts on hydraulic cylinder 7 place, the sub-fraction of described hydraulic cylinder 7 is only shown in fig. 2, hang over the weight of platform 3 at hydraulic cylinder 7 place by the downward pulling box 11 of hydraulic cylinder 7, box 11 is pulled to downwards seabed, and clamping element 20 continues to rotate counterclockwise a little angle, and at the chucking power F at spud leg 2 placeNDuring increase, until defined chucking power FNAct on spud leg 2。The teeth portion 23a of clamping face 23 engages with the outer wall of spud leg 2, and eight clamping elements 20 are by continuing to rotate counterclockwise an angle under the downward pulling force effect on box 11。Due to the geometric construction of clamping element 20, produce to act on the ever-increasing clamping action of the clamping element 20 on the outer wall of spud leg 2 and ever-increasing chucking power by rotational motion。The geometric construction of clamping element 20 shown in figure 2 figure 6 illustrates。Second embodiment of clamping element 20 figure 7 illustrates。
Figure 4 and 5 illustrate jacking equipment 1, and it includes the clamping element 20 of Fig. 3 equally, but the clamping chain (4,6) according to Fig. 1 of not shown continuous print annular。Fig. 4 illustrates holder 10, and it is arranged on one in the clamping element group of spud leg 2, and clamping element group functionally meets the clamping chain 4 in Fig. 1 at it。
One holder 10 is shown in detail in Figure 5。Described holder 10 includes a U shape profile 50, is respectively arranged with, in the inner side of the relatively opposed leg of described U shape profile 50, the string (Reihe) being made up of three clamping elements 20。Two row's clamping elements 20 are accurately oppositely arranged on flat ribbon structure 51 place in couples。Clamping element 20 can rotate around the rotation axle 21 being set parallel to each other。Rotate the axle 21 alignment in the radial direction at spud leg 2。Two rows of clamping element 20 are spaced a segment distance so that the flat ribbon structure 51 guided between which applies clamping action。Flat ribbon structure 51 is fixed on the outer wall place of spud leg 2 by its narrow longitudinal edge, for instance by welding。So, holder 10 do not constitute according to Fig. 1 around spud leg 2 arrange two clamping chains (4,6) in one, the holder 10 of described clamping chain is connected to each other by the connecting plate 13 of the length of annular, and at this, the holder 10 of clamping element group is not connected directly to one another；They are combined effect only, applies and release clamping action simultaneously。According to Fig. 4, holder 10 is fixing with two hydraulic cylinders 7 to be connected。Hydraulic cylinder 7 is in the side back on holder 10 as being directly connected with platform 3 or with another holder 10, and described clamping components is engaging with same flat ribbon structure 51.
Fig. 6 a and Fig. 6 b illustrates the side view of the clamping element 20 according to Fig. 4 or Fig. 2。Fig. 6 A illustrates the clamping element 20 in centre position, and in described position, clamping element 20 does not directly contact with the outer wall of spud leg 2。Fig. 6 b illustrates the clamping element 20 at another clip position。In another clip position described, the wall contacts of another clamping face 23 and spud leg 2。Clamping element 20 has the plane of symmetry 60, and on the plane of symmetry, clamping element 20 is set to specular。The surface normal of the plane of symmetry 60It is set to be tangential on the rotation direction R of clamping element 20。Described clamping element 20 has the clamping face 22 being oppositely arranged at the plane of symmetry 60 place with another clamping face 23。The clamping element 20 that Fig. 6 a illustrates between a clip position and another clip position can come and go rotation by the centre position according to Fig. 6 a, in one clip position, clamping face 22 directly contacts with the outer wall of spud leg 2, and in another clip position described, clamping face 23 directly contacts with the outer wall of spud leg 2。
Vertical connection lines 61, it intersects with the midpoint rotating axle 21, and is perpendicular to the outer wall of spud leg 2, and according in another clip position of Fig. 6 b, described vertical connection lines is through another clamping face 23, and it is not limited to accurately。Another clamping face 23 is vertical away from rotating axle 21 in long lever arm LH。The midpoint of another clamping face 23 is arranged on deviates short lever arm KH from rotation axle 21。
When the outer wall of another clamping face 23 with spud leg 2 carries out match materials, use coefficientoffrictionμ, for instance μ < 0.2, following geometric construction need to be selected so that chucking power FNIt is five times in axial force F, therefore can produce frictional force FR, it causes enough inhibitory action。
Fig. 7 a illustrates the perspective view of the second embodiment of the clamping element 20 according to the present invention。Described clamping element 20 is configured to specular at the plane of symmetry 60 place again。Described clamping element 20 includes the circular open for rotating axle 21。At this, clamping face 22 and another clamping face 23 are constructed specular along the plane of symmetry 60。Clamping face 22 includes three clamping components 70 with circular contact face。Three circular surfaces 71 constitute another contact surface 23 of clamping element 20 together。Clamping element 20 includes two side jaws 72, and they are spaced apart, and has two outer guide portion 74。Clamping components 70 is coniform opening at it towards the side of jaw 72, and direct insertion is arranged between jaw 72 in corresponding guide portion 74 touchly。Each guide portion 74 is separated by T-shaped baffle plate 76 towards its end of the plane of symmetry 60 at it。Described T-shaped baffle plate 76 includes the plane towards spud leg 2, and described plane is slightly the plane of cone shape bootstrap block beyond clamping components 70, but after being maintained at clamping face (22,23)。Thus when spud leg 2 does relative motion, stable clamp position can be ensured in the horizontal direction at relative and platform 3 or clamping device。The T-shaped leg of T-shaped baffle plate 76 is inserted into (eingefuehrt) in the clamping element 20 between two jaws 70。
Fig. 7 b, 7c and 7d illustrate the embodiment of the respective revision slightly of the clamping element 20 in Fig. 7 a。Clamping element 20 in fig .7b respectively has a clamping components 70 in each clamping face (22,23), each clamping components 70 is directly adjacent with T-shaped baffle plate 76, and contacts in the respective guide portion 74 of clamping face (22,23) with T-shaped baffle plate 76。Guide portion 74 is inserted in two guide portion 74 end toward each other according to the clamping components 70 of embodiment in Fig. 4 b。Fig. 7 c illustrates the embodiment of clamping element 20, has a clamping components 70 equally in each guide portion 74, and wherein, clamping components 70 is arranged on the outer end of guide portion 74 so that two clamping components 70 have farthest distance each other。Fig. 7 d illustrates embodiment, and two clamping components 70 are arranged on the centre of respective guide portion 74 wherein。It is also contemplated that the position of clamping components 70 can mix setting in respective guide portion 74。
The different setting of clamping components 70 makes chucking power F with quantityNDistribution also differ。Clamping components 70 reciprocates along guide portion 74, and can fix along the optional position of guide portion 74。By the clamping components 70 different setting along guide portion 74, it is possible to adjust chucking power FNWith frictional force FRRatio。
Disclose another embodiment of clamping element 20 according to the present invention in figs. 8 and 9, for instance, one of two clamping chains (4,6) of Fig. 1, but, described clamping element can also embed in the clamping components 10 according to Fig. 4 and Fig. 5。Clamping element according to Fig. 6 or Fig. 7 meets the principle of clamping。But, the clamping element 20 of Fig. 8 and Fig. 9 respectively only includes a clamping face 22。
Accompanying drawing labelling:
1 lowering or hoisting gear
2 spud legs
3 platforms
4 clamping chains
6 another clamping chains
7 hydraulic cylinders
10 holders
11 boxes
12 short connecting plates
13 long connecting plates
20 clamping elements
21 rotate axle
22 clamping faces
22a teeth portion
23 another clamping faces
24 flat interval regions
25 rollers
26 fixing hole portions
50U shape profile
51 flat ribbon structures
60 planes of symmetry
61 vertical connection lines
62 diagonal
70 clamping components
71 circular surfaces
72 side jaws
74 guide portion
76T shape casing member
KH short lever arm
LH long lever arm
L is longitudinally
F radial force
FNChucking power
FRFrictional force
R rotation direction
μ coefficient of friction
Claims (15)
1. a device, it is for by clamping for equipment (3) the elongate structure body (2) that (L) extends longitudinally, described device can reciprocate along the longitudinal extension of elongate structure body (2), and equipped with self-locking mechanism, described self-locking mechanism includes at least one clamping element (20) rotated around the rotating shaft (21) being associated between at least one clip position and centre position
It is characterized in that, at least one clamping element (20) includes the arm extended from its rotating shaft (21), described arm has at least one clamping face (22,23) arranged back to the arm end of rotating shaft (21), and thus, at least one clamping face described (22,23) has the same relative position relative to arm being positioned at least one clip position and centre position and each position along rotary motion track。
2. device according to claim 1, it is characterised in that between rotating shaft (21) and at least one clamping face (22,23), described arm is designed as dimensionally stable。
3. device according to claim 1 and 2, it is characterised in that described self-locking mechanism both can stop equipment can also stop forward retrogressing along elongate structure body。
4. the device according to claim 1,2 or 3, it is characterised in that at least one clamping face (22,23) is set to flat。
5. the device according to any one of aforementioned Claims 1-4, it is characterized in that, at least one clamping element (20) can rotate through centre position between clip position and another clip position, wherein, at described clip position, along the retrogressing movement of elongate structure body (2) by self-locking, and another clip position described, along moving forward by self-locking of elongate structure body (2)。
6. according to device in any one of the preceding claims wherein, it is characterized in that, having rotation curve in the region that at least one clamping face (22,23) is drawn in its rotation process from centre position to clip position, the radius of described rotation curve is less than the radius rotating curve in the back-end region of at least one clamping face (22,23)。
7. according to device in any one of the preceding claims wherein, it is characterized in that, at least one clamping element (20) includes at least one guide portion (74) for clamping components (70), and the clamping components (70) in guide portion (74) can be fixed on different positions, and thus adjustable chucking power (FN)。
8. according to device in any one of the preceding claims wherein, it is characterized in that, self-locking mechanism includes along the holder disposed circumferentially around (10) around described elongate structure body (2), and each described holder (10) has at least one clamping element (20), described clamping element rotates around the rotating shaft (21) of himself relative to it。
9. according to device in any one of the preceding claims wherein, it is characterized in that, adjacent holder (10) is connected with each other by long connecting plate (13), and holder (10) and long connecting plate (13) constitute the clamping chain (4,6) arranged around described elongate structure body (2)。
10. according to device in any one of the preceding claims wherein, it is characterized in that, described holder (10) has U shape profile (50), and there are the clamping element (20) being oppositely arranged, bootable ribbon structure (51) between described clamping element in the inner side of U-shaped leg。
11. according to device in any one of the preceding claims wherein, it is characterized in that, clamping element (20) is arranged at least two clamping element group, in longitudinal direction (L), described clamping element group relative to each other may move, and each clamping element group constitutes respective self-locking mechanism。
12. according to device in any one of the preceding claims wherein, it is characterised in that the clamping element (20) of clamping element group collectively forms at least one clamping cross section that size is variable。
13. device according to claim 12, it is characterized in that, clamping element group can be fixed on equipment (3) relative to moveable equipment (3) by hydraulic drive cylinder (7), and the equipment (3) that another clamping element group is fixing relative to position is fixed on equipment (3)。
14. the method for installing offshore set-up, described offshore set-up include platform (3) and according to claim 1 to 13 at least one spud leg (2) of device (1), by following method steps, the described device (1) around at least one spud leg (2) is installed, wherein, two clamping element groups (4, 6) clamping face (22) of clamping element (20) alternately applies clamping action at least one spud leg (2), so, in drop-down step, at least one spud leg (2) and device (1) are declining towards the longitudinal direction (L) in seabed, described clamping element (20) is rotating and passes through intermediate position, and, with latter two clamping element group (4, 6) another clamping face (23) of clamping element (20) alternately applies clamping action at least one spud leg (2), so, platform (3) is promoted to operation height in longitudinal direction (L)。
15. one kind is used for dismantling offshore set-up method, described offshore set-up include platform (3) and according to claim 1 to 13 at least one spud leg (2) of device (1), pass through following method steps, wherein, two clamping element groups (4, 6) another clamping face (23) of clamping element (20) alternately applies clamping action at least one spud leg (2), so, in drop-down step, platform (3) and device (1) are declining towards the longitudinal direction (L) on sea, described clamping element (20) is rotating and passes through intermediate position, and, with latter two clamping element group (4, 6) clamping face (22) of clamping element (20) alternately applies clamping action at spud leg (2), so at least one spud leg (2) is pulled up in longitudinal direction (L)。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13190962.4 | 2013-10-30 | ||
| EP20130190962 EP2868805A1 (en) | 2013-10-30 | 2013-10-30 | Lifting device with form-stable clamping element |
| PCT/EP2014/072783 WO2015062974A1 (en) | 2013-10-30 | 2014-10-23 | Lifting device with a dimensionally stable clamping element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105705703A true CN105705703A (en) | 2016-06-22 |
Family
ID=49510025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480060306.4A Pending CN105705703A (en) | 2013-10-30 | 2014-10-23 | Lifting device with a dimensionally stable clamping element |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2868805A1 (en) |
| KR (1) | KR20160078370A (en) |
| CN (1) | CN105705703A (en) |
| WO (1) | WO2015062974A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014104546A1 (en) * | 2014-03-31 | 2015-10-01 | Overdick Gmbh & Co. Kg | lifting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1058577A (en) * | 1912-04-27 | 1913-04-08 | Charles L Gardner | Well-pipe clamp. |
| US2335266A (en) * | 1942-01-23 | 1943-11-30 | Charles H Ellaby | Automatic spud locking device |
| WO1985005645A1 (en) * | 1984-05-29 | 1985-12-19 | Bethlehem Steel Corporation | Mobile, offshore, jack-up, marine platform adjustable for sloping seafloor |
| US4715456A (en) * | 1986-02-24 | 1987-12-29 | Bowen Tools, Inc. | Slips for well pipe |
| CN101871208A (en) * | 2010-06-01 | 2010-10-27 | 崔峰 | Locking device with double spherical hinge bearing structure for pile legs of self-elevating drilling platform |
| CN102162233A (en) * | 2011-02-21 | 2011-08-24 | 中国海洋石油总公司 | Continuous stepping hydraulic lifting device and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2775869A (en) | 1952-04-22 | 1957-01-01 | L B De Long | Platform construction |
| US2841961A (en) | 1953-04-13 | 1958-07-08 | Delong Corp | Off-shore drilling barge |
| US2822670A (en) | 1953-09-02 | 1958-02-11 | Delong Corp | Perforated caisson jack assembly |
| AT276688B (en) | 1965-08-02 | 1969-11-25 | Schoeller Bleckmann Stahlwerke | Structural system for raising and lowering platforms and work platforms |
| US4002038A (en) | 1975-10-06 | 1977-01-11 | Raymond International Inc. | Method and apparatus for rapid erection of offshore towers |
| NL7904738A (en) | 1979-06-18 | 1980-12-22 | Rsv Gusto Eng Bv | APPARATUS FOR COUPLING TWO LINEAR WITH EACH OTHER POSITION OF MOVABLE BODIES. |
| US7527093B2 (en) * | 2006-09-15 | 2009-05-05 | Frank's Casing Crew And Rental Tools, Inc. | Self-tightening safety tubular clamp |
-
2013
- 2013-10-30 EP EP20130190962 patent/EP2868805A1/en not_active Withdrawn
-
2014
- 2014-10-23 CN CN201480060306.4A patent/CN105705703A/en active Pending
- 2014-10-23 WO PCT/EP2014/072783 patent/WO2015062974A1/en active Application Filing
- 2014-10-23 KR KR1020167012424A patent/KR20160078370A/en not_active Application Discontinuation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1058577A (en) * | 1912-04-27 | 1913-04-08 | Charles L Gardner | Well-pipe clamp. |
| US2335266A (en) * | 1942-01-23 | 1943-11-30 | Charles H Ellaby | Automatic spud locking device |
| WO1985005645A1 (en) * | 1984-05-29 | 1985-12-19 | Bethlehem Steel Corporation | Mobile, offshore, jack-up, marine platform adjustable for sloping seafloor |
| US4715456A (en) * | 1986-02-24 | 1987-12-29 | Bowen Tools, Inc. | Slips for well pipe |
| CN101871208A (en) * | 2010-06-01 | 2010-10-27 | 崔峰 | Locking device with double spherical hinge bearing structure for pile legs of self-elevating drilling platform |
| CN102162233A (en) * | 2011-02-21 | 2011-08-24 | 中国海洋石油总公司 | Continuous stepping hydraulic lifting device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015062974A1 (en) | 2015-05-07 |
| KR20160078370A (en) | 2016-07-04 |
| EP2868805A1 (en) | 2015-05-06 |
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Application publication date: 20160622 |