Offshore platform pile leg
By setting a slow flow port and diversion blade inside the pile legs of the offshore platform, the opening and closing of the diversion blades is controlled by using the motor drive system, the impact of rapid water flow on the pile legs is solved, and the strength and stability of the pile legs are improved.
Patent Information
- Application Number
- CN202422140884.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-02
AI Technical Summary
Existing offshore platform pile legs are susceptible to impact damage under rapid water flow conditions, especially in storm weather.
A marine platform pile leg is designed with a slow flow port and a diversion blade inside. The driving gear and friction sleeve are driven by the motor to control the opening and closing of the diversion blades, and balance the internal and external water pressure to reduce the impact force.
It effectively reduces the impact force of the pile legs in the rapid water flow, improves the structural strength and stability of the pile legs, and prevents damage.
Smart Images
Figure CN223151150U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pile legs, in particular to a pile leg of an offshore platform. Background Art
[0002] Most of the pile legs of offshore platforms are steel-structured cylindrical or square-columnar, and the lower part of the pile legs is equipped with pile shoes. Generally, there is no need for a flushing device in foreign geology. However, in the coastal geology of China, the clay layer is relatively thick, and the soil properties are different at different operation sites. The strata are complex and the geology is loose. When the platform is jacked into the pile, it goes deep into the mud. Moreover, the soil is damaged during pile jacking and re-slurried and silted back, forming new attached soil that stabilizes on the pile leg and has great strength after long-term consolidation.
[0003] At present, most of the existing pile legs of offshore platforms are steel-structured cylindrical. When the water flow velocity is relatively fast under the sea surface, it will cause certain impact on the pile legs of the offshore platform. Especially during stormy weather, the impact force will increase, and in severe cases, it will even cause damage to the pile legs of the offshore platform. Summary of the Utility Model
[0004] The utility model provides a pile leg of an offshore platform to solve the problems of the prior art.
[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the utility model is as follows:
[0006] A pile leg of an offshore platform includes a cylindrical leg. The inside of the cylindrical leg is hollow. On the middle parts of the front and rear outer surfaces of the cylindrical leg, slow-flow openings are provided. On the middle of the inner top surface and the inner bottom surface of each of the two slow-flow openings, a plurality of rotating shafts are rotatably connected at equal intervals. Guide vane blades are fixed on the outer surfaces of the plurality of rotating shafts. The front and rear sides of the plurality of guide vane blades are mutually overlapped and pressed. The top and bottom of the plurality of guide vane blades are hermetically attached to the inner top surface and the inner bottom surface of the slow-flow opening respectively.
[0007] Optionally, the tops of the plurality of rotating shafts extend to the top of the cylindrical leg, and friction wheels are fixed on the tops of the plurality of rotating shafts.
[0008] Optionally, an annular groove is provided at the position close to the top edge between the inner walls of the cylindrical leg. A clamping ring is rotatably connected in the annular groove, and a friction sleeve is fixed between the inner walls of the clamping ring.
[0009] Optionally, the top of the friction sleeve extends to the top of the cylindrical leg, and the outer surface of the friction sleeve is mutually attached to the outer surface of the friction wheel.
[0010] Optionally, a limiting groove is provided on the outer surface of the friction wheel, and a guiding ring that is clamped inside the limiting groove is fixed at the position close to the top edge of the outer surface of the friction sleeve.
[0011] Optionally, a gear ring is fixed at the inner wall of the friction sleeve near the bottom edge. A support is fixed to the inner wall of the cylindrical leg. A motor is fixed to the support. A driving gear is fixed to the output end of the motor. The driving gear meshes with the gear ring.
[0012] Optionally, a plurality of reinforcing plates are equidistantly fixed to the outer surface of the cylindrical leg. An annular fixing plate is fixed between the plurality of reinforcing plates. A support sleeve is fixed to the outer surface of the cylindrical leg near the top edge.
[0013] After adopting the above technical solutions, the present utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the present utility model does not necessarily need to achieve all the advantages described below:
[0014] 1. In the present utility model, a plurality of guide vanes inside the flow-attenuating port are mutually attached end to end, so that the flow-attenuating port can be closed. When the water flow velocity is relatively fast and a large impact force is generated on the cylindrical leg, by opening the guide vanes, the flow-attenuating port can be opened. At this time, the water flow will pass through the inside of the cylindrical leg, making the water pressure inside and outside the cylindrical leg the same, reducing the impact force on the cylindrical leg. When opening the guide vanes, by starting the motor, the driving gear can be driven to rotate, thereby driving the gear ring to drive the friction sleeve to rotate. When the friction sleeve rotates, it can drive the friction wheel to drive the rotating shaft to rotate, and then the opening and closing of the guide vanes can be controlled.
[0015] 2. In the present utility model, when the friction sleeve rotates, through the mutual engagement of the annular groove and the snap ring, the friction sleeve can be guided, making the rotation of the friction sleeve more stable. At the same time, a guide ring is fixed to the friction sleeve. By the mutual engagement of the guide ring and the limiting groove on the outer surface of the friction wheel, it can prevent the friction wheel from shifting when rotating in mutual friction with the friction sleeve. A plurality of reinforcing plates are fixed to the outer surface of the cylindrical leg, and the plurality of reinforcing plates are connected by an annular fixing plate, so that the overall strength of the cylindrical leg can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings in the description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:
[0017] Figure 1 is the main perspective structural schematic diagram of a leg of an offshore platform proposed by the present utility model;
[0018] Figure 2 is the side sectional perspective structural schematic diagram of a leg of an offshore platform proposed by the present utility model;
[0019] Figure 3This utility model provides a schematic perspective view of the other side cross-section of a leg of an offshore platform;
[0020] Figure 4 This utility model Figure 2 is an enlarged view of part A in the figure.
[0021] In the attached drawings, the list of components represented by each reference numeral is as follows:
[0022] 1. Cylindrical leg; 2. Flow-attenuating orifice; 3. Flow-guiding vane; 4. Support sleeve; 5. Reinforcing plate; 6. Annular fixing plate; 7. Rotating shaft; 8. Support; 9. Motor; 10. Driving gear; 11. Ring gear; 12. Friction wheel; 13. Limit groove; 14. Annular groove; 15. Snap ring; 16. Friction sleeve; 17. Guide ring.
[0023] It should be noted that these attached drawings and text descriptions are not intended to limit the scope of the concept of this utility model in any way, but to illustrate the concept of this utility model to those skilled in the art by referring to specific embodiments. Detailed implementation mode
[0024] Now, the present utility model will be further described in detail with reference to the attached drawings.
[0025] In Embodiment 1, as Figures 1-4 shown, the present utility model provides a technical solution for a leg of an offshore platform: including a cylindrical leg 1, the interior of the cylindrical leg 1 is hollow, flow-attenuating orifices 2 are provided in the middle of the front and rear outer surfaces of the cylindrical leg 1, a plurality of rotating shafts 7 are rotatably connected at equal intervals to the middle of the inner top surface and the inner bottom surface of the two flow-attenuating orifices 2, flow-guiding vanes 3 are fixed to the outer surfaces of the plurality of rotating shafts 7, the front and rear sides of the plurality of flow-guiding vanes 3 are mutually laminated, and the top and bottom of the plurality of flow-guiding vanes 3 are hermetically attached to the inner top surface and the inner bottom surface of the flow-attenuating orifice 2 respectively.
[0026] The overall effect achieved by the entire Embodiment 1 is that the plurality of flow-guiding vanes 3 inside the flow-attenuating orifice 2 are mutually attached end to end, so that the flow-attenuating orifice 2 can be closed. When the water flow velocity is relatively fast and a large impact force is generated on the cylindrical leg 1, by opening the flow-guiding vanes 3, the flow-attenuating orifice 2 can be opened. At this time, the water flow will pass through the interior of the cylindrical leg 1, making the water pressure inside and outside the cylindrical leg 1 the same, reducing the impact force on the cylindrical leg 1. When opening the flow-guiding vanes 3, by starting the motor 9, the driving gear 10 can be driven to rotate, thereby driving the ring gear 11 to drive the friction sleeve 16 to rotate. When the friction sleeve 16 rotates, it can drive the friction wheel 12 to drive the rotating shaft 7 to rotate, and further control the opening and closing of the flow-guiding vanes 3.
[0027] In Embodiment 2, as Figures 1-4As shown in the figure, the tops of multiple rotating shafts 7 all extend to the top of the cylindrical support leg 1. Friction wheels 12 are fixed to the tops of the multiple rotating shafts 7. An annular groove 14 is formed between the inner walls of the cylindrical support leg 1 near the top edge. A snap ring 15 is rotatably connected inside the annular groove 14. A friction sleeve 16 is fixed between the inner walls of the snap ring 15. The top of the friction sleeve 16 extends to the top of the cylindrical support leg 1. The outer surface of the friction sleeve 16 is in mutual contact with the outer surface of the friction wheel 12. A limiting groove 13 is formed on the outer surface of the friction wheel 12. A guiding ring 17 that is snapped inside the limiting groove 13 is fixed to the outer surface of the friction sleeve 16 near the top edge. A gear ring 11 is fixed between the inner walls of the friction sleeve 16 near the bottom edge. A support 8 is fixed to the inner wall of the cylindrical support leg 1. A motor 9 is fixed to the support 8. A driving gear 10 is fixed to the output end of the motor 9. The driving gear 10 meshes with the gear ring 11. A plurality of reinforcing plates 5 are equidistantly fixed to the outer surface of the cylindrical support leg 1. An annular fixing plate 6 is fixed between the plurality of reinforcing plates 5. A support sleeve 4 is fixed to the outer surface of the cylindrical support leg near the top edge.
[0028] The effect achieved by the entire Embodiment 2 is that when the friction sleeve 16 rotates, through the mutual engagement of the annular groove 14 and the snap ring 15, the friction sleeve 16 can be guided, making the rotation of the friction sleeve 16 more stable. At the same time, a guiding ring 17 is fixed to the friction sleeve 16. By the mutual engagement of the guiding ring 17 and the limiting groove 13 on the outer surface of the friction wheel 12, it can prevent the friction wheel 12 from shifting when rotating in mutual friction with the friction sleeve 16. A plurality of reinforcing plates 5 are fixed to the outer surface of the cylindrical support leg 1, and the plurality of reinforcing plates 5 are connected by an annular fixing plate 6, so that the overall strength of the cylindrical support leg 1 can be improved.
[0029] Working principle: When using this device, multiple flow guiding vanes 3 inside the flow buffering port 2 are mutually attached end to end, so that the flow buffering port 2 can be closed. When the water flow velocity is relatively fast and a large impact force is generated on the cylindrical support leg 1, by opening the flow guiding vanes 3, the flow buffering port 2 can be opened. At this time, the water flow will pass through the inside of the cylindrical support leg 1, making the water pressure inside and outside the cylindrical support leg 1 the same, reducing the impact force on the cylindrical support leg 1. When opening the flow guiding vanes 3, by starting the motor 9, the driving gear 10 can be driven to rotate, thereby driving the gear ring 11 to drive the friction sleeve 16 to rotate. When the friction sleeve 16 rotates, it can drive the friction wheel 12 to drive the rotating shaft 7 to rotate, and then the opening and closing of the flow guiding vanes 3 can be controlled. When the friction sleeve 16 rotates, through the mutual engagement of the annular groove 14 and the snap ring 15, the friction sleeve 16 can be guided, making the rotation of the friction sleeve 16 more stable. At the same time, a guiding ring 17 is fixed on the friction sleeve 16. By the mutual engagement of the guiding ring 17 and the limiting groove 13 on the outer surface of the friction wheel 12, the friction wheel 12 can be prevented from generating deviation when rotating in mutual friction with the friction sleeve 16. A plurality of reinforcing plates 5 are fixed on the outer surface of the cylindrical support leg 1, and the plurality of reinforcing plates 5 are connected by an annular fixing plate 6, so that the overall strength of the cylindrical support leg 1 can be improved.
[0030] The present utility model is not limited to the above-mentioned embodiments. Anyone should know that structural changes made under the inspiration of the present utility model, as long as they have the same or similar technical solutions as the present utility model, all fall within the protection scope of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.
Claims
1. An offshore platform leg, comprising a cylindrical leg (1), characterized in that: The interior of the cylindrical support leg (1) is hollow. Flow-attenuating openings (2) are provided in the middle of the outer surfaces on the front and rear sides of the cylindrical support leg (1). A plurality of rotating shafts (7) are rotatably connected at equal intervals to the middle of the inner top surface and the inner bottom surface of the two flow-attenuating openings (2). Guide vanes (3) are fixed to the outer surfaces of the plurality of rotating shafts (7). The front and rear sides of the plurality of guide vanes (3) are overlapped with each other. The top and bottom of the plurality of guide vanes (3) are hermetically fitted between the inner top surface and the inner bottom surface of the flow-attenuating opening (2) respectively.
2. The leg of an offshore platform according to claim 1, characterized in that: The tops of the plurality of rotating shafts (7) extend to the top of the cylindrical support leg (1), and friction wheels (12) are fixed to the tops of the plurality of rotating shafts (7).
3. The leg of an offshore platform according to claim 2, characterized in that: An annular groove (14) is provided near the top edge between the inner walls of the cylindrical support leg (1). A snap ring (15) is rotatably connected to the inside of the annular groove (14), and a friction sleeve (16) is fixed between the inner walls of the snap ring (15).
4. The leg of an offshore platform according to claim 3, characterized in that: The top of the friction sleeve (16) extends to the top of the cylindrical support leg (1), and the outer surface of the friction sleeve (16) is in contact with the outer surface of the friction wheel (12).
5. A leg of an offshore platform according to claim 4, characterized in that: A limiting groove (13) is provided on the outer surface of the friction wheel (12), and a guide ring (17) that is engaged with the inside of the limiting groove (13) is fixed to the outer surface of the friction sleeve (16) near the top edge.
6. The leg of an offshore platform according to claim 5, wherein: A gear ring (11) is fixed between the inner walls of the friction sleeve (16) near the bottom edge. A support (8) is fixed to the inner wall of the cylindrical support leg (1), and a motor (9) is fixed to the support (8). A driving gear (10) is fixed to the output end of the motor (9), and the driving gear (10) is engaged with the gear ring (11).
7. The leg of an offshore platform according to claim 1, wherein: A plurality of reinforcing plates (5) are fixed to the outer surface of the cylindrical support leg (1) at equal intervals. An annular fixing plate (6) is fixed between the plurality of reinforcing plates (5). A support sleeve (4) is fixed to the outer surface of the cylindrical support leg near the top edge.