A jack-up platform

Abstract

A kind of self-elevating platform, including upper platform body and lower platform body;The top of lower platform body is provided with multiple upper pile legs, upper pile leg is equipped with upper lifting system, and upper lifting system is located inside upper platform body, lower platform body is provided with lower lifting system inside, and lower lifting system is provided with lower pile leg inside, when application, first, using lower lifting system, lower platform body and upper platform body are synchronously jacked to operating height;Subsequently, using upper lifting system, upper platform body is continued to be jacked upward along upper pile leg, to make upper platform body higher than the top of pile leg;Through upper lifting system, upper platform body is secondly jacked, completely eliminate the problem that pile leg protrudes deck due to uneven seabed geology, make upper platform body deck surface form unobstructed full-through type work site, effectively retain platform effective use area.Therefore, pile leg does not protrude from platform when the present design is used, and effective use area of platform is retained.

Description

Technical Field

[0001] This invention relates to a platform device, belonging to the field of jacking platforms in marine engineering equipment, and particularly to a self-elevating platform. Background Technology

[0002] With the development of marine resources moving towards the deep sea and the rapid development of emerging industries such as offshore wind power and marine ranching, higher demands are being placed on the stability and operational efficiency of offshore equipment. As an important type of mobile marine engineering equipment, the jack-up platform, with its advantages of lifting the platform above the water surface during operation, avoiding direct wave loads on the platform, and possessing good stability and positioning accuracy, has become the preferred platform type for offshore drilling, wind power installation, and maintenance operations.

[0003] Chinese patent application number 201921902134.7, filed on November 6, 2019, discloses a novel marine self-elevating platform lifting device, including a frame. The frame consists of a frame top, a frame body welded to the frame top, and a deck welded to the frame body. A first pin device is installed on the frame top, and a lifting cylinder is hinged to the lower end of the frame top. The lower end of the lifting cylinder is hinged to a moving ring beam mechanism. The moving ring beam mechanism consists of a moving ring beam and a second pin device fixedly installed on the moving ring beam. A pile leg is fitted in the middle of the moving ring beam, and pin holes are installed on the pile leg. The distance between the pin holes is 1 / 2 of the maximum stroke of the lifting cylinder. A lifting sensor is fixedly installed on the frame body, and the deck is fixedly installed on the ship's platform. Although this design can achieve the effect of raising the frame body and the deck to form a platform, it still has the following drawbacks:

[0004] The design requires the legs to be inserted into the seabed to secure them during use. However, due to the uneven geology of the seabed, it is difficult to uniformly insert the legs into the mud. As a result, some legs always protrude from the deck surface during operation, compressing the already limited effective usable deck area.

[0005] The information disclosed in this background section is intended only to enhance understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects and problems of existing technologies where some pile legs protrude from the platform during use, compressing the effective usable area of ​​the platform, and to provide a self-elevating platform in which the pile legs do not protrude from the platform during use, thus preserving the effective usable area of ​​the platform.

[0007] To achieve the above objectives, the technical solution of the present invention is:

[0008] A self-elevating platform, the platform comprising an upper platform body and a lower platform body;

[0009] The top of the lower platform is provided with multiple upper pile legs. An upper lifting system is fitted on the outer surface of the upper pile legs. The upper lifting system moves up and down along the upper pile legs. The outer surface of the upper lifting system is connected to the upper lifting hole of the upper platform. The upper lifting hole is a through hole.

[0010] The lower platform is provided with multiple lower lifting holes, which are through holes. A lower lifting system is installed inside the lower lifting hole. The inner surface of the lower lifting system is connected to the outer surface of the lower pile leg. The movement stroke of the lower lifting system is to move up and down along the lower pile leg.

[0011] The upper pile leg is located inside the lower pile leg.

[0012] The upper lifting system includes an upper mounting frame and an upper lifting unit. One side of the upper mounting frame is connected to the inner surface of the upper lifting hole, and the other side of the upper mounting frame is connected to the fixed end of the upper lifting unit. The upper gear end of the upper lifting unit is meshed with the upper rack on the surface of the upper pile leg.

[0013] The upper leg is a cylindrical leg, and two upper racks are symmetrically arranged on the outer surface of each upper leg. Each upper rack is meshed with the upper gear end of the upper lifting unit.

[0014] The lifting unit includes three longitudinally arranged lifting sub-units.

[0015] The upper mounting frame is a cylindrical structure, and the upper mounting frame is provided with two rows of symmetrically arranged upper mounting holes, in which an upper lifting sub-unit is inserted.

[0016] The lower lifting system includes a lower mounting frame and a lower lifting unit. One side of the lower mounting frame is connected to the inner surface of the lower lifting hole, and the other side of the lower mounting frame is connected to the fixed end of the lower lifting unit. The lower gear end of the lower lifting unit is engaged with the lower rack on the surface of the lower pile leg.

[0017] The lower pile legs are triangular truss type pile legs, and three sets of lower racks are symmetrically arranged on the outer surface of each lower pile leg. The lower racks are meshed with the lower gear end of the lower lifting unit.

[0018] Each set of lower racks includes two lower racks, one of which meshes with the three longitudinally arranged lower lifting sub-units of a lower lifting unit.

[0019] The lower mounting bracket is a triangular prism structure, and each corner of the lower mounting bracket has longitudinally arranged lower mounting holes on both sides, into which a lower lifting sub-unit is inserted.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In a self-elevating platform of the present invention, the platform includes an upper platform body and a lower platform body; the top of the lower platform body is provided with multiple upper legs, and the upper legs are fitted with an upper lifting system, which is located inside the upper platform body. The lower platform body is provided with a lower lifting system, and the lower lifting system is provided with lower legs. In application, the lower platform body and the upper platform body are first lifted synchronously to the working height using the lower lifting system; then, the upper lifting system is used to continue lifting the upper platform body upward along the upper legs, so that the upper platform body is higher than the top of the legs. The advantages of the present invention also include:

[0022] First point: The raised upper platform in this invention can be used as an offshore platform;

[0023] Secondly, by using the upper lifting system to lift the upper platform a second time, the problem of the pile legs protruding from the deck caused by uneven seabed geology is completely eliminated, making the upper platform deck surface an unobstructed, fully accessible working area. This not only facilitates the standardized stacking of bulk materials, but also provides an ideal flat base for the take-off, landing, and transfer of low-altitude aircraft such as drones and helicopters.

[0024] Thirdly, both the upper and lower lifting systems are embedded inside the upper and lower platform bodies. Compared with the traditional arrangement where the lifting system is placed outside the main deck, the overall center of gravity of the platform is lowered, which effectively suppresses the roll and pitch amplitude under towing and storm survival conditions, greatly improving the platform's survivability and operational stability at sea.

[0025] Therefore, when using this invention, the pile legs do not protrude from the platform, and the effective usable area of ​​the platform is preserved.

[0026] 2. In this invention, a self-elevating platform includes an upper lifting system comprising an upper mounting frame and upper lifting units. The upper mounting frame is located inside the upper platform body and is connected to the fixed end of the upper lifting units. Two upper lifting units are meshed with two upper racks on the surface of the upper legs. Each set of upper lifting units includes three longitudinally arranged upper lifting sub-units. In application, the three upper lifting sub-units sequentially engage with the upper racks along the vertical direction to climb. By utilizing longitudinally connected multi-stage support points, the self-weight load of the upper platform body is converted into multi-segment distributed forces. This not only significantly reduces the bending stress borne by a single-stage gear but also effectively prevents uneven loading and jamming between a single upper lifting sub-unit and the rack, ensuring balanced force and smooth operation of the upper platform body throughout the lifting process. Therefore, the lifting process of the upper platform body of this invention is stable.

[0027] 3. In this invention, a self-elevating platform includes a lower lifting system comprising a lower mounting frame and lower lifting units. The lower mounting frame is located inside the lower platform body and is connected to the fixed end of the lower lifting units. Three lower lifting units are engaged with three sets of lower racks on the lower legs. Each set of lower racks includes two lower racks, and each set of lower lifting units includes two rows of lower lifting sub-units. Each row of lower lifting sub-units contains three units. In application, the three lower lifting sub-units of the same set are arranged in a long column along the vertical direction, forming a double-sided clamping multi-point support for the two lower racks. The longitudinally extending multi-stage engagement points evenly distribute the enormous self-weight of the lower and upper platform bodies onto the chord tubes of the truss legs, effectively suppressing torsional deformation during long-stroke lifting and ensuring the stability and safety of the lower platform's lifting. Therefore, the lower platform of this invention has a stable lifting process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the pile leg inserted into the seabed when the present invention is applied.

[0030] Figure 3 This is a schematic diagram of the structure of the present invention reaching the working position.

[0031] Figure 4 yes Figure 3 Schematic diagram of the upper and lower lifting systems.

[0032] Figure 5 This is a top view of the present invention.

[0033] Figure 6 yes Figure 4 A schematic diagram of the upper and middle lifting subunit.

[0034] Figure 7 yes Figure 6 Top view.

[0035] Figure 8 yes Figure 4 Schematic diagram of the middle and lower mounting bracket.

[0036] Figure 9 yes Figure 8 Top view.

[0037] Figure 10 yes Figure 9 A schematic diagram of the structure of the lower and middle lifting subunit.

[0038] Figure 11 yes Figure 10 A schematic diagram of the lower middle rack.

[0039] In the diagram: Upper platform 1, Upper lifting hole 11, Penetrating hole 12, Lower platform 2, Lower lifting hole 21, Upper leg 3, Upper rack 31, Upper lifting system 4, Upper mounting frame 41, Upper mounting hole 411, Upper lifting unit 42, Upper gear end 421, Upper lifting subunit 422, Lower lifting system 5, Lower mounting frame 51, Lower mounting hole 511, Lower lifting unit 52, Lower gear end 521, Lower lifting subunit end 522, Lower leg 6, Lower rack 61. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Please see Figure 1 — Figure 11 A self-elevating platform, the platform comprising an upper platform body 1 and a lower platform body 2;

[0042] The lower platform 2 is provided with a plurality of upper pile legs 3. The outer surface of the upper pile legs 3 is fitted with an upper lifting system 4. The upper lifting system 4 moves up and down along the upper pile legs 3. The outer surface of the upper lifting system 4 is connected to the upper lifting hole 11 of the upper platform 1. The upper lifting hole 11 is a through hole.

[0043] The lower platform 2 is provided with a plurality of lower lifting holes 21, each of which is a through hole. A lower lifting system 5 is provided inside the lower lifting hole 21. The inner surface of the lower lifting system 5 is connected to the outer surface of the lower pile leg 6. The movement stroke of the lower lifting system 5 is to move up and down along the lower pile leg 6.

[0044] The upper pile leg 3 is located inside the lower pile leg 6.

[0045] The upper lifting system 4 includes an upper mounting frame 41 and an upper lifting unit 42. One side of the upper mounting frame 41 is connected to the inner surface of the upper lifting hole 11, and the other side of the upper mounting frame 41 is connected to the fixed end of the upper lifting unit 42. The upper gear end 421 of the upper lifting unit 42 is meshed with the upper rack 31 on the surface of the upper pile leg 3.

[0046] The upper leg 3 is a cylindrical leg, and two upper racks 31 are symmetrically arranged on the outer surface of each upper leg 3. Each upper rack 31 is meshed with the upper gear end 421 of the upper lifting unit 42.

[0047] The lifting unit 42 includes three longitudinally arranged lifting sub-units 422.

[0048] The upper mounting bracket 41 has a cylindrical structure and is provided with two rows of symmetrically arranged upper mounting holes 411. An upper lifting sub-unit 422 is inserted into the upper mounting holes 411.

[0049] The lower lifting system 5 includes a lower mounting frame 51 and a lower lifting unit 52. One side of the lower mounting frame 51 is connected to the inner surface of the lower lifting hole 21, and the other side of the lower mounting frame 51 is connected to the fixed end of the lower lifting unit 52. The lower gear end 521 of the lower lifting unit 52 is engaged with the lower rack 61 on the surface of the lower pile leg 6.

[0050] The lower pile leg 6 is a triangular truss type pile leg. Each lower pile leg 6 has three sets of lower racks 61 symmetrically arranged on its outer surface. The lower racks 61 are meshed with the lower gear end 521 of the lower lifting unit 52.

[0051] Each set of lower racks 61 includes two lower racks 61, and one lower rack 61 is engaged with three longitudinally arranged lower lifting sub-units 522 of a lower lifting unit 52.

[0052] The lower mounting bracket 51 has a triangular prism structure. Each corner of the lower mounting bracket 51 has longitudinally arranged lower mounting holes 511 on both sides. A lower lifting sub-unit 522 is inserted into the lower mounting holes 511.

[0053] The following are supplementary descriptions of the present invention:

[0054] The upper platform 1 and the lower platform 2 of the present invention are both steel box-shaped structures.

[0055] Example 1:

[0056] Please see Figure 1 — Figure 11 A self-elevating platform includes an upper platform body 1 and a lower platform body 2. The lower platform body 2 has multiple upper legs 3 at its top. An upper lifting system 4 is fitted onto the outer surface of each upper leg 3, and the upper lifting system 4 moves up and down along the upper legs 3. The outer surface of the upper lifting system 4 is connected to an upper lifting hole 11 on the upper platform body 1, and the upper lifting hole 11 is a through hole. The lower platform body 2 has multiple lower lifting holes 21, and each lower lifting hole 21 is a through hole. A lower lifting system 5 is installed within each lower lifting hole 21, and the inner surface of the lower lifting system 5 is connected to the outer surface of each lower leg 6. The lower lifting system 5 moves up and down along the lower legs 6. Preferably, the upper legs 3 are located inside the lower legs 6. Preferably, the upper platform body 1 has a through hole 12 corresponding to the position of the lower legs 6.

[0057] When in use, the state of the self-elevating platform after reaching the working position is as follows: Figure 3 As shown, the lower lifting system 5 is first used to drive the lower pile legs 6 to be lowered and inserted into the seabed until the lower platform 2 and the upper platform 1 are simultaneously lifted to the working height. At this time, due to the uneven seabed geology, the mud penetration depth of the four lower pile legs 6 varies. When the top of the pile of the lower pile leg 6 with the smallest mud penetration depth reaches the marked working position of the lower platform 2, the lower lifting system 5 stops operating, completing the pile positioning. Figure 2 As shown; then, the upper lifting system 4 drives the upper platform 1 to continue to rise along the upper legs 3 until the deck surface of the upper platform 1 is higher than the tops of the upper legs 3 and the lower legs 6, so that all legs do not protrude from the surface of the upper platform 1, thus forming an unobstructed, fully accessible working area on the surface of the upper platform 1, such as... Figure 1 As shown. The through hole 12 is a space for the lower pile leg 6 to pass through. A fence can be added at the through hole 12 to prevent people from falling through this hole. The upper pile leg 3 is located inside the lower pile leg 6. This staggered layout of the inner and outer sides allows the upper pile leg 3 and the lower pile leg 6 to work together better, forming a more stable force system, thereby greatly improving the bending stiffness and ultimate bearing capacity of the entire pile leg structure.

[0058] Example 2:

[0059] The basic content is the same as in Example 1, except that:

[0060] Please see Figure 1 — Figure 7 The upper lifting system 4 includes an upper mounting frame 41 and an upper lifting unit 42. One side of the upper mounting frame 41 is connected to the inner surface of the upper lifting hole 11, and the other side of the upper mounting frame 41 is connected to the fixed end of the upper lifting unit 42. The upper gear end 421 of the upper lifting unit 42 meshes with the upper rack 31 on the surface of the upper leg 3. The upper leg 3 is a cylindrical leg, and two upper racks 31 are symmetrically arranged on the outer surface of each upper leg 3. Each upper rack 31 meshes with the upper gear end 421 of the upper lifting unit 42. The upper lifting unit 42 includes three longitudinally arranged upper lifting sub-units 422. The upper mounting frame 41 is a cylindrical structure, and the upper mounting frame 41 is provided with two rows of symmetrically arranged upper mounting holes 411, in which the upper lifting sub-units 422 are inserted. Preferably, the variable frequency motor of the upper lifting unit 42 has a built-in electromagnetic brake, which can lock the upper gear end 421 and the upper rack 31 to fix the upper platform body 1.

[0061] When the upper lifting system 4 is activated, the upper gear end 421 of the upper lifting unit 42 meshes with two upper racks 31 symmetrically arranged on the outer surface of each upper leg 3, forming a double-sided symmetrical power transmission path. The three longitudinally arranged upper lifting sub-units 422 within the upper lifting unit 42 operate synchronously, driving the upper platform body 1 to continue to lift upwards along the upper leg 3 through the stable meshing of the upper gear end 421 with the upper racks 31 on both sides. During this process, the upper mounting frame 41, as a rigid support base, provides stable mounting points for the three longitudinally arranged upper lifting sub-units 422 through its two rows of symmetrically arranged upper mounting holes 411, ensuring that the vertical force of the two sets of symmetrical upper lifting sub-units 422 is evenly transmitted to the inner wall of the upper lifting hole 11, effectively counteracting the lateral torque generated by the meshing of the double-sided racks. When the upper platform 1 rises to the working position, the built-in electromagnetic brake of the variable frequency motor of the upper lifting unit 42 is activated, locking the relative position of the upper gear end 421 and the upper rack 31, thus achieving reliable fixation of the upper platform 1 at a high position, ultimately making the deck surface of the upper platform 1 higher than the top of all the pile legs. Other mechanical locking mechanisms can also be added to assist in locking.

[0062] Example 3:

[0063] The basic content is the same as in Example 1, except that:

[0064] Please see Figure 1 — Figure 11 The lower lifting system 5 includes a lower mounting frame 51 and a lower lifting unit 52. One side of the lower mounting frame 51 is connected to the inner surface of the lower lifting hole 21, and the other side of the lower mounting frame 51 is connected to the fixed end of the lower lifting unit 52. The lower gear end 521 of the lower lifting unit 52 meshes with the lower rack 61 on the surface of the lower leg 6. The lower leg 6 is a triangular truss type leg, and three sets of lower racks 61 are symmetrically arranged on the outer surface of each lower leg 6. The lower racks 61 mesh with the lower gear end 521 of the lower lifting unit 52. Each set of lower racks 61 includes two lower racks 61, and one lower rack 61 meshes with three longitudinally arranged lower lifting sub-units 522 of one lower lifting unit 52. The lower mounting bracket 51 has a triangular prism structure. Each corner of the lower mounting bracket 51 has longitudinally arranged lower mounting holes 511 on both sides, into which a lower lifting sub-unit 522 is inserted. Preferably, the variable frequency motor of the lower lifting unit 52 has a built-in electromagnetic brake, which can lock the lower gear end 521 to the lower rack 61 to fix the lower platform body 2. Preferably, the number of lower lifting sub-units 522 is set as needed.

[0065] During application, the lower lifting system 5 activates, driving the lower leg 6 to descend and insert into the seabed. Since the lower leg 6 is a triangular truss type leg, three sets of lower racks 61 are symmetrically arranged on its outer surface. When the lower lifting system 5 is activated, the three sets of lower lifting units 52 respond simultaneously. The lower lifting unit 52 in each set maintains engagement with the two lower racks 61 in the same set through its lower gear end 521, forming a stable equilateral triangle support structure in the top view. This perfectly matches the force characteristics of the triangular truss leg and effectively counteracts the overturning moment caused by the eccentric load of the platform. Meanwhile, the lower mounting frame 51, as the core load-bearing component, utilizes its triangular prism structure with three corners corresponding to three sets of lower racks 61. The longitudinally arranged lower mounting holes 511 on both sides of each corner provide precise mounting bases for the three lower lifting sub-units 522, allowing the three longitudinally arranged lower lifting sub-units 522 to form a dense power support zone in the vertical direction. This evenly distributes and transfers the enormous self-weight of the lower platform body 2 and the upper platform body 1 to the chord tubes of the lower pile legs 6. When the platform is synchronously lifted to the working height, the lower lifting system 5 stops operating. At this time, the built-in electromagnetic brake of the variable frequency motor of the lower lifting unit 52 is activated, locking the relative position of the lower gear end 521 and the lower rack 61. This ensures the stability of the lower platform body 2 in the pile-standing state and provides a reliable support foundation for the subsequent secondary lifting of the upper lifting system 4. Other mechanical locking mechanisms can also be added to assist in locking.

[0066] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A self-elevating platform, characterized in that: The platform includes an upper platform body (1) and a lower platform body (2); The lower platform body (2) is provided with a plurality of upper pile legs (3) on its top. The outer surface of the upper pile legs (3) is fitted with an upper lifting system (4). The upper lifting system (4) moves up and down along the upper pile legs (3). The outer surface of the upper lifting system (4) is connected to the upper lifting hole (11) of the upper platform body (1). The upper lifting hole (11) is a through hole. The lower platform body (2) is provided with a plurality of lower lifting holes (21). The lower lifting holes (21) are through holes. A lower lifting system (5) is provided in the lower lifting holes (21). The inner surface of the lower lifting system (5) is connected to the outer surface of the lower pile leg (6). The movement stroke of the lower lifting system (5) is to move up and down along the lower pile leg (6).

2. The self-elevating platform according to claim 1, characterized in that: The upper pile leg (3) is located inside the lower pile leg (6).

3. A self-elevating platform according to claim 1 or 2, characterized in that: The upper lifting system (4) includes an upper mounting frame (41) and an upper lifting unit (42). One side of the upper mounting frame (41) is connected to the inner surface of the upper lifting hole (11), and the other side of the upper mounting frame (41) is connected to the fixed end of the upper lifting unit (42). The upper gear end (421) of the upper lifting unit (42) is meshed with the upper rack (31) on the surface of the upper pile leg (3).

4. A self-elevating platform according to claim 3, characterized in that: The upper pile leg (3) is a cylindrical pile leg. Two upper racks (31) are symmetrically arranged on the outer surface of each upper pile leg (3). Each upper rack (31) is meshed with the upper gear end (421) of the upper lifting unit (42).

5. A self-elevating platform according to claim 4, characterized in that: The lifting unit (42) includes three longitudinally arranged lifting sub-units (422).

6. A self-elevating platform according to claim 5, characterized in that: The upper mounting bracket (41) is a cylindrical structure. The upper mounting bracket (41) is provided with two rows of symmetrically arranged upper mounting holes (411). An upper lifting sub-unit (422) is inserted into the upper mounting holes (411).

7. A self-elevating platform according to claim 1 or 2, characterized in that: The lower lifting system (5) includes a lower mounting bracket (51) and a lower lifting unit (52). One side of the lower mounting bracket (51) is connected to the inner surface of the lower lifting hole (21), and the other side of the lower mounting bracket (51) is connected to the fixed end of the lower lifting unit (52). The lower gear end (521) of the lower lifting unit (52) is meshed with the lower rack (61) on the surface of the lower pile leg (6).

8. A self-elevating platform according to claim 7, characterized in that: The lower pile leg (6) is a triangular truss type pile leg. Each lower pile leg (6) has three sets of lower racks (61) symmetrically arranged on its outer surface. The lower racks (61) are meshed with the lower gear end (521) of the lower lifting unit (52).

9. A self-elevating platform according to claim 8, characterized in that: Each set of lower racks (61) includes two lower racks (61), and one lower rack (61) is engaged with three longitudinally arranged lower lifting sub-units (522) of a lower lifting unit (52).

10. A self-elevating platform according to claim 9, characterized in that: The lower mounting bracket (51) is a triangular prism structure. Each corner of the lower mounting bracket (51) is provided with longitudinally arranged lower mounting holes (511) on both sides. A lower lifting subunit (522) is inserted into the lower mounting holes (511).

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