CN103787208A - Truss crane for self-elevating work platform - Google Patents
Truss crane for self-elevating work platform Download PDFInfo
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- CN103787208A CN103787208A CN201410023121.8A CN201410023121A CN103787208A CN 103787208 A CN103787208 A CN 103787208A CN 201410023121 A CN201410023121 A CN 201410023121A CN 103787208 A CN103787208 A CN 103787208A
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Abstract
The invention provides a truss crane for a self-elevating work platform. The truss crane comprises a ship body, a ship body deck, spud legs and a crane body, wherein the spud legs are arranged inside the ship body in a penetrating manner; the crane body comprises a crane base and a crane jib; the crane body also comprises a truss base fixed on the ship body deck; the crane base is fixed at the upper end of the truss base; the crane jib can rotate around the spud legs when the spud legs extend out of the highest position of the ship body deck. By adopting the truss crane for the self-elevating work platform, the condition that the crane jib rotates around the spud legs when the ship body works in any water area can be ensured by lifting the crane to a certain height through the truss base, so that the effect on rotation of the crane jib caused by the height of the spud legs extending out of the ship body deck is removed. Therefore, the condition that the crane can achieve the full-rotation lifting operation under any work condition is ensured. In addition, the crane formed by the truss base is simple in structure and low in construction cost.
Description
Technical field
The present invention relates to a kind of ocean engineering elevator machinery, particularly relate to a kind of Lattice Crane for jack up workplatform.
Background technology
Along with the fast development of offshore wind farm and oil production industry, the demand that uses ocean engineering elevator machinery to carry out installation and maintenance offshore platform increases day by day, ocean engineering elevator machinery is also had higher requirement simultaneously.The hoisting crane that is applied to marine jack up workplatform all will meet following three important indicators: boom outreach, sling height and full circle swinging hoisting operation ability.At present, the ocean engineering elevator machinery pattern that is applied to marine jack up workplatform is various, and main pattern has masts type, A posture and around stake formula etc.Wherein, masts type and A gantry crane all need to arrange pedestal on the deck of hull, and in order to meet these two indexs of boom outreach and sling height, way is limited raising base height and the length of boom that increases hoisting crane conventionally.But aforesaid operations can increase weight and the height of gravitational center of jack up workplatform, cause cost greatly to increase, particularly, when jack up workplatform is during in the construction of China coast shallow draft and intertidal belt wind electric field, jack up workplatform can shoal and decline along with sea, therefore the spud leg not part in seawater is less, and that spud leg stretches out the part of jack up workplatform is more, and then the impact that causes hoisting crane to be subject to spud leg stretching out terrace part height, hoisting crane is difficult to realize full circle swinging hoisting operation in the case.
In order to address the above problem, occur in recent years a kind of around stake formula hoisting crane, as Chinese utility model patent specification sheets CN202766146U discloses a kind of large-scale around stake formula offshore platform hoisting crane, comprise the spud leg being inserted on main deck, on described spud leg, cover has shoe, described shoe is placed on described main deck, described shoe is provided with pedestal, described pedestal is provided with rotary supporting device, described rotary supporting device top is provided with turn table, one side of described turn table is provided with driver's cab and machine room, on described turn table, be provided with successively luffing range of cantilever support winch, main hoister winch, secondary hoister winch, on described turn table, be also provided with Shears, the top of described Shears is provided with Shears top pulleys group, described turn table is connected with jib, the top of described jib is provided with jib head assembly pulley, the below, top of described jib is provided with main hoisting hook, secondary suspension hook and luffing suspension hook.But this is large-scale around stake formula offshore platform hoisting crane cost and costliness thereof, all has a huge impact for investment budgey and the production cycle of jack up workplatform.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of simple in structure, cost is low and can realize the Lattice Crane for jack up workplatform of full circle swinging hoisting operation.
For achieving the above object, the invention provides a kind of Lattice Crane for jack up workplatform, comprise hull, deck in ship structure, be located in spud leg and hoisting crane in hull, described hoisting crane comprises hoist base and crane arm, described hoisting crane also comprises that one is fixed on the truss type chassis in deck in ship structure, described hoist base is fixed on the upper end of truss type chassis, and when described spud leg stretches out deck in ship structure position when the highest, described crane arm can be walked around spud leg.
Preferably, the height of described truss type chassis is 50～70m.
Further, described truss type chassis comprises the many main chords of vertically placing, between adjacent two main chords, be provided with the many triatic stays that distribute up and down, described triatic stay and main chord form multiple square bodies unit, are provided with the lateral diagonal bar being positioned on this square body cell cube diagonal line in each square body unit; Described main chord and triatic stay, main chord and lateral diagonal bar, triatic stay and lateral diagonal bar are and are welded to connect.
Preferably, described main chord is through stretching to hull bottom after deck in ship structure, and main chord and hull bulkhead are welded to connect.
Further, the upper end of described truss type chassis is welded with the shrouding of a horizontal arrangement, and this shrouding is positioned at the framework that many main chords surround, and described hoist base is a cylinder and is welded on described shrouding.
Preferably, described main chord, triatic stay and lateral diagonal bar are high strength steel.
As mentioned above, the Lattice Crane for jack up workplatform the present invention relates to, has following beneficial effect:
In the present invention, by truss type chassis, hoisting crane is lifted to certain altitude, while making hull no matter which kind of waters to carry out work in, can guarantee that the arm of hoisting crane walks around spud leg, stretch out this part of height of deck in ship structure to the rotating impact of crane arm thereby eliminate spud leg, and then assurance hoisting crane can both be realized full circle swinging hoisting operation under any operating mode; In addition, the crane structure being made up of truss type chassis is simple, and cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the lateral plan of Fig. 1.
Fig. 3 is another embodiment of the present invention.
Fig. 4 is the structural representation of truss type chassis in Fig. 1.
Fig. 5 is that the A-A of Fig. 4 is to cutaway view.
Fig. 6 is the connection diagram of truss type chassis and hull in the present invention.
Fig. 7 is the connection diagram of truss type chassis and hoist base in the present invention.
Element numbers explanation
1 hull
11 deck in ship structure
12 hull bulkheads
2 spud legs
3 hoisting cranes
31 hoist bases
32 crane arms
4 truss type chassis
41 main chords
42 triatic stays
43 square body unit
44 lateral diagonal bars
5 shroudings
6 large brackets
The specific embodiment
By particular specific embodiment explanation embodiments of the present invention, person skilled in the art scholar can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets below.
Notice, appended graphic the illustrated structure of this specification sheets, ratio, size etc., all contents in order to coordinate specification sheets to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under effect that the present invention can produce and the object that can reach, all should still drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, in this specification sheets, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, changing under technology contents, when being also considered as the enforceable category of the present invention without essence.
As depicted in figs. 1 and 2, the present invention relates to a kind of Lattice Crane for jack up workplatform, comprise hull 1, deck in ship structure 11, be located in spud leg 2 and hoisting crane 3 in hull 1, described hoisting crane 3 comprises hoist base 31 and crane arm 32, described hoisting crane 3 also comprises that one is fixed on the truss type chassis 4 in deck in ship structure 11, described hoist base 31 is fixed on the upper end of truss type chassis 4, when described spud leg 2 stretches out deck in ship structure 11 positions when the highest, described crane arm 32 can be walked around spud leg 2.Preferably, the height of described truss type chassis 4 is 50～70m, and certainly, according to on-the-spot particular case, the height of described truss type chassis 4 can suitably be adjusted.
In the present invention, described hull 1, deck in ship structure 11, hoisting crane 3 form jack up workplatform, this jack up workplatform is across the sea floating, and along with the height of sea water level heave and set, therefore when jack up workplatform is in shallow draft district or under the operating mode of anchoring location, it is the highest that spud leg 2 stretches out the position of deck in ship structure 11, and the length that spud leg 2 stretches out from deck in ship structure 11 is the longest; Under jack up workplatform is hoisting operating mode time, it need to be located by spud leg 2, therefore that spud leg 2 stretches out the position of deck in ship structure 11 is minimum, the length that spud leg 2 stretches out from deck in ship structure 11 is the shortest.The present invention is lifted to certain height by truss type chassis 4 by hoisting crane 3 chassis, and the length of stretching out from deck in ship structure 11 at spud leg 2 is under the operating mode of growing most, this height can make crane arm 32 walk around spud leg 2, be that crane arm 32 can not collide with spud leg 2 in rotary course, and then guarantee jack up workplatform no matter in which kind of operating mode, no matter apply the hoisting crane of which kind of form, hoisting crane can both be realized full circle swinging operation, to reach the requirement of full circle swinging hoisting operation.In addition, adopt truss type chassis 4 greatly to reduce costs, thereby effectively solve the contradiction between hoisting crane boom outreach, sling height, full circle swinging hoisting operation and cost.
Further, because the height of truss type chassis 4 is 50～70m, it is highly higher, therefore in the process of hoisting crane 3 full circle swinging operations, hoisting crane 3 can apply vertical load and larger capsizing moment to truss type chassis 4, and truss type chassis 4 is highly higher, the load that it is suffered and moment are just larger, therefore the strength and stiffness of truss type chassis 4 are required just higher.In order to meet the requirement of strength and stiffness, in the present embodiment, as shown in Figure 1, Figure 4 and Figure 5, described truss type chassis 4 comprises the many main chords 41 of vertically placing, and many main chords 41 are array-like and are evenly arranged, between adjacent two main chords 41, be provided with the many triatic stays 42 that distribute up and down, described triatic stay 42 and main chord 41 form multiple square bodies unit 43, the length of side of this square body unit 43 is the length of a triatic stay 42, is provided with the lateral diagonal bar 44 being positioned on these square body unit 43 body diagonals in each square body unit 43; Described main chord 41 is and is welded to connect with lateral diagonal bar 44 with lateral diagonal bar 44, triatic stay 42 with triatic stay 42, main chord 41, and each node and main chord 41 stress calculate by analysis of finite element method, make truss type chassis 4 there will not be fatigue damage in its used life.Described truss type chassis 4 adopts after said structure, its structural strength strengthens greatly, and the power effectively hoisting crane 3 being applied it passes to deck in ship structure 11 and hull 1, and carrys out balance by extra large buoyancy of water, thereby guarantees structural strength and the job stabilization of whole jack up workplatform.
In addition, the number of described main chord 41 is decided by the weight size of hoisting crane 3, the truss type chassis 4 of two kinds of different models is provided in the present invention, embodiment mono-, as shown in Figure 4 and Figure 5, described main chord 41 has 16, arranges by 4 of left and right, 4 of front and back, between two adjacent main chords 41, is all welded with a triatic stay 42; Embodiment bis-, as shown in Figure 3, described main chord 41 has 9, arranges by 3 of left and right, 3 of front and back, between two adjacent main chords 41, is all welded with a triatic stay 42.In addition, in two neighbouring square body unit 43, the direction of tilt of two lateral diagonal bars 44 is consistent, and in two square body unit 43 that left and right is adjacent or front and back are adjacent, the direction of tilt of two lateral diagonal bars 44 is contrary, further guarantee the structural strength of truss type chassis 4, guarantee that hoisting crane 3 is formed to actv. to be supported.
Preferably, in order to alleviate the weight of truss type chassis 4, described truss type chassis 4 adopts the special high strength steel of ocean engineering, and main chord 41, triatic stay 42 and lateral diagonal bar 44 are high strength steel.
Further, due to after hoisting crane 3 raised by truss type chassis 4, the position of hoisting crane 3 centers of gravity and truss type chassis 4 centers of gravity is higher, under the effect of ship motion, wind load and lift heavy, truss type chassis 4 roots will bear very large load, so in order to guarantee the Joint strenght between truss type chassis 4 and hull 1, truss type chassis 4 with the connection structure of hull 1 is: as shown in Figure 6, described main chord 41 stretches to hull 1 bottom through after deck in ship structure 11, and main chord 41 and hull bulkhead 12 are welded to connect.In addition, some main chord 41 does not contact with hull bulkhead 12 after stretching into hull 1 inside, now, can be by large bracket 6 transition, all weld large bracket 6 at junction, the main chord 41 of main chord 41 and deck in ship structure 11 with the junction of hull 1 bottom, to guarantee the Joint strenght of truss type chassis 4 and hull 1, and bracket 6 can also effectively be distributed to the suffered load of truss type chassis 4 roots in hull 1 structure greatly, avoids stressed too concentrated.Preferably, as shown in Figure 6, at the root of truss type chassis 4, between adjacent two main chords 41, also can weld the large bracket 6 being positioned on deck in ship structure 11 upper surfaces, further strengthen structural strength.
Further, the concrete connection structure of truss type chassis 4 and hoist base 31 is: as shown in Figure 7, weld the shrouding 5 of a horizontal arrangement in the upper end of truss type chassis 4, this shrouding 5 is positioned at the many frameworks that surround in peripheral main chord 41, and described hoist base 31 is a cylinder and is welded on described shrouding 5.Preferably, can, in the upper end of truss type chassis 4, between adjacent two main chords 41, weld large bracket 6, between main chord 41 and hoist base 31, weld large bracket 6, to increase the reliability of connection, and effective transmitted load.
Preferably, when after main chord in truss type chassis 4 41 and triatic stay 42, main chord 41 and lateral diagonal bar 44, triatic stay 42 and 44 welding of lateral diagonal bar and after truss type chassis 4 and hoist base 31, hull 1 weld, also need the flaw detection of taking pictures of each weld nugget or weld seam, observe in weld seam and whether have welding slag or bubble, determine that whether each weld nugget or weldquality be qualified, if nonconformity, the operation such as repair, reweld, until all weld nuggets, weldquality all meet the requirements, and then guarantee integrally-built intensity and quality.
In sum, the present invention has following beneficial effect;
1, adopt truss type chassis 4 that hoisting crane 3 chassis are raised, make hoisting crane 3 reach the requirement of full backhaul hoisting operation;
2, adopt truss type chassis 4, compared with the base of transmission, its weight alleviates greatly, and truss structure good stability, and for being subject to, the structure of larger vertical load and capsizing moment is more favourable;
3, by the mode of finite element, whole truss structure is carried out to force analysis, its structure is optimized, successively reduces scantling, the size of the comparable peripheral main chord 41 of size of internal main chord member 41 is little, to reduce the weight of truss type chassis 4, make full use of material;
4, by modeling Analysis structural static strength, the stability of truss type chassis 4 whole and parts all can be met the demands;
5, after welding, butt welded seam and weld nugget are detected a flaw, and guarantee the quality of truss type chassis 4, to guarantee carrying out smoothly of operation.
So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (6)
1. the Lattice Crane for jack up workplatform, comprise hull (1), deck in ship structure (11), be located in the spud leg (2) in hull (1), and hoisting crane (3), described hoisting crane (3) comprises hoist base (31) and crane arm (32), it is characterized in that: described hoisting crane (3) also comprises that one is fixed on the truss type chassis (4) in deck in ship structure (11), described hoist base (31) is fixed on the upper end of truss type chassis (4), when described spud leg (2) stretches out deck in ship structure (11) position when the highest, described crane arm (32) can be walked around spud leg (2).
2. Lattice Crane according to claim 1, is characterized in that: the height of described truss type chassis (4) is 50～70m.
3. Lattice Crane according to claim 1, it is characterized in that: described truss type chassis (4) comprises the many main chords (41) of vertically placing, between adjacent two main chords (41), be provided with the many triatic stays (42) that distribute up and down, described triatic stay (42) and main chord (41) form multiple square bodies unit (43), are provided with the lateral diagonal bar (44) being positioned on this square body unit (43) body diagonal in each square body unit (43); Described main chord (41) is and is welded to connect with lateral diagonal bar (44) with lateral diagonal bar (44), triatic stay (42) with triatic stay (42), main chord (41).
4. Lattice Crane according to claim 3, is characterized in that: described main chord (41) is through stretching to hull (1) bottom after deck in ship structure (11), and main chord (41) and hull bulkhead (12) are welded to connect.
5. Lattice Crane according to claim 3, it is characterized in that: the upper end of described truss type chassis (4) is welded with the shrouding (5) of a horizontal arrangement, this shrouding (5) is positioned at the framework that many main chords (41) surround, and described hoist base (31) is a cylinder and is welded on described shrouding (5).
6. Lattice Crane according to claim 3, is characterized in that: described main chord (41), triatic stay (42) and lateral diagonal bar (44) are high strength steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410023121.8A CN103787208A (en) | 2014-01-17 | 2014-01-17 | Truss crane for self-elevating work platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410023121.8A CN103787208A (en) | 2014-01-17 | 2014-01-17 | Truss crane for self-elevating work platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089039A (en) * | 2014-05-20 | 2015-11-25 | 天津市海王星海上工程技术股份有限公司 | Self-elevating type hoisting platform and installation method |
| CN106741615A (en) * | 2017-01-06 | 2017-05-31 | 浙江海洋大学 | A kind of fishing boat gin pole |
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| CN203255892U (en) * | 2013-04-15 | 2013-10-30 | 江苏大通重工有限公司 | Heightened gantry type crane |
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| US20020079278A1 (en) * | 2000-08-17 | 2002-06-27 | Sanders Ronald E. | Elevated crane support system and method for elevating a lifting apparatus |
| EP2189574A1 (en) * | 2008-11-19 | 2010-05-26 | Geosea NV | Jack-up offshore platform and its use for assembling and servicing a structure at sea |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089039A (en) * | 2014-05-20 | 2015-11-25 | 天津市海王星海上工程技术股份有限公司 | Self-elevating type hoisting platform and installation method |
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| CN106741615A (en) * | 2017-01-06 | 2017-05-31 | 浙江海洋大学 | A kind of fishing boat gin pole |
| CN106741615B (en) * | 2017-01-06 | 2023-09-22 | 浙江海洋大学 | Fishing boat jack-up mast |
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Application publication date: 20140514 |