A pile shoe for an offshore platform

Abstract

The present invention relates to a marine platform pile shoe, which belongs to the technical field of marine platforms. It includes pile legs, a base and multiple mud-entering struts, the pile legs are vertically arranged, the base is fixedly arranged at the bottom end of the pile legs, and multiple mud-entering struts are circumferentially distributed with the pile legs as the center, the mud-entering struts are inclined, and each mud-entering strut is connected to a driving mechanism, the driving mechanism is used to drive the mud-entering strut to insert into the seabed, and a tamping mechanism and an auxiliary mechanism are provided on the base; the auxiliary mechanism includes a mud-entering seat, the mud-entering seat is hollow, and the bottom of the mud-entering seat is conical, and a power assembly, a first insertion rod and multiple second insertion rods are provided in the mud-entering seat, and the multiple second insertion rods are circumferentially distributed with the vertical axis of the mud-entering seat as the center. The present invention inserts the mud-entering seat, the first insertion rod and the second insertion rod into the seabed, thereby increasing the seabed insertion depth and improving stability. At the same time, tamping the seabed by a tamping ring can further improve stability.

Description

Technical Field

[0001] The invention relates to an ocean platform pile shoe, belonging to the technical field of ocean platforms. Background Art

[0002] An offshore platform, a type of marine engineering machinery used for offshore oil extraction and structure lifting operations, primarily consists of a platform body, pile legs, pile shoes, and a lifting mechanism. During operation, the platform body is supported above sea level by the pile legs and pile shoes, while the pile legs and pile shoes extend deep into the seabed to bear the entire offshore platform's pressure.

[0003] Chinese invention patent publication number CN114855791B discloses an adjustable stabilizing pile shoe. The pile shoe comprises a pile shoe body to which pile legs are connected; the pile shoe body comprises a support structure, a telescopic structure, a gear structure, and a drive module; the pile legs are provided with at least one gear structure, comprising a spur rack and a gear; the spur rack is disposed on the outer surface of the pile shoe body and arranged along the height direction; the gear is connected to the drive module, which meshes with the spur rack; each gear structure is connected to a drive module, which is connected to the support structure, which is connected to the telescopic structure; one end of the telescopic structure is connected to the support structure and the other end is connected to the pile shoe body; and a motor is provided within the drive module to provide power. This invention improves operational flexibility through the coordinated use of the spur rack, gear, and drive module. By using a telescopic device, the inclination angle of the connection between the mud-entering strut and the pile leg is changed, thereby increasing the support surface of the mud-entering strut and improving the stability of the pile shoe. However, in the prior art, the stability of the entire pile shoe is achieved by inserting a mud-penetrating support rod into the seabed. However, the depth to which the mud-penetrating support rod is inserted into the seabed is limited, and when subjected to impact force, the overall stability of the pile shoe will still be affected. In addition, when the mud-penetrating support rod is inserted into the seabed, the soil above the mud-penetrating support rod is prone to loosening, which will also affect the overall stability of the pile shoe.

[0004] Therefore, there is a need for an offshore platform pile shoe to improve stability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an offshore platform pile shoe with improved stability in order to overcome the deficiencies of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is as follows: a marine platform pile shoe, comprising a pile leg, a base, and a plurality of mud-entering struts, wherein the pile leg is arranged vertically, the base is fixedly arranged at the bottom end of the pile leg, and the plurality of mud-entering struts are circumferentially distributed around the pile leg, the mud-entering struts are arranged obliquely, and each mud-entering strut is connected to a driving mechanism for driving the mud-entering strut to penetrate into the seabed; the base is provided with a tamping mechanism and an auxiliary mechanism;

[0007] The auxiliary mechanism includes a mud-entering seat, which is hollow and has a conical bottom. A power assembly, a first plug rod and a plurality of second plug rods are provided in the mud-entering seat. The plurality of second plug rods are circumferentially distributed with the vertical axis of the mud-entering seat as the center. The first plug rod is vertically arranged, and the bottom end of the first plug rod movably passes through the bottom of the mud-entering seat. The top end of the first plug rod is connected to the power assembly, and the power assembly drives the first plug rod to rise and fall. A plurality of through holes are provided on the side of the mud-entering seat, and the plurality of through holes correspond one to one to the plurality of second plug rods. One end of the second plug rod is inserted into the through hole, and the other end of the second plug rod is connected to the power assembly, and the power assembly drives the second plug rod to move along the length direction of the second plug rod;

[0008] The compacting mechanism includes a compacting ring and multiple lifting components. The axis of the compacting ring is arranged vertically. The multiple lifting components are evenly arranged on the base around the pile leg. The lifting components are connected to the compacting ring and drive the compacting ring to lift and lower back and forth.

[0009] Preferably, the power assembly includes a first motor and a first screw, the first screw is vertically arranged, the top end of the first screw is connected to the first motor, the top end of the first insertion rod is threadedly sleeved on the first screw, the first screw is threadedly connected to a lifting plate, a plurality of first guide rods are fixedly arranged on the lifting plate, the first guide rods are horizontally arranged, the plurality of first guide rods correspond one to one to the plurality of second insertion rods, a slider is movably connected to the first guide rod, and the slider is fixedly connected to the second insertion rod.

[0010] Preferably, a plurality of guide plates are provided on the outer peripheral wall of the first insertion rod, and the plurality of guide plates are evenly distributed circumferentially with the first insertion rod as the center; a plurality of slide grooves are provided at the bottom of the mud entry seat, and the plurality of slide grooves correspond to and match the plurality of guide plates one by one, and the guide plates pass through the slide grooves.

[0011] Preferably, the mud entry seat includes a cylindrical section and a conical section distributed up and down, and the cylindrical section and the conical section are coaxially arranged.

[0012] Preferably, the bottom end of the first insertion rod and the bottom end of the guide plate are both on the same conical surface as the outer wall of the cone section.

[0013] Preferably, the through hole is provided on the cone segment.

[0014] Preferably, the lifting assembly includes a connecting rod and an electromagnet, the connecting rod vertically passes through the tamping ring, the bottom end of the connecting rod is fixedly set on the top of the base, the electromagnet is fixedly set on the top of the connecting rod, and a gap is set between the tamping ring and the electromagnet.

[0015] Preferably, the bottom of the tamping ring is concave to form a groove, the top of the base is inserted into the groove, and the top of the groove fits with the top of the base.

[0016] Preferably, the driving mechanism includes a second screw and a slip ring, the second screw is vertically arranged, the top end of the second screw is connected to the second motor, the second screw is screwed to a lifting block, one end of the mud-entering support rod is hinged to the lifting block, the other end of the mud-entering support rod is an insertion end, the slip ring is movably sleeved on the mud-entering support rod, the slip ring is connected to an oil cylinder, the cylinder body of the oil cylinder is hinged to the top of the base, and the piston end of the oil cylinder is hinged to the slip ring.

[0017] Preferably, a second guide rod is vertically provided on the lifting block, and the second guide rod is fixedly arranged on the base.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The present invention provides an offshore platform pile shoe that is inserted into the seabed through a mud-entering seat, a first insertion rod and a second insertion rod, thereby increasing the seabed insertion depth and improving stability. At the same time, the seabed is compacted by a compacting ring, which can further improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of a pile shoe for an offshore platform according to the present invention;

[0021] Figure 2 This is a front view of an offshore platform pile shoe according to the present invention;

[0022] Figure 3 This is a left side view of an offshore platform pile shoe according to the present invention;

[0023] Figure 4 This is a top view of an offshore platform pile shoe according to the present invention;

[0024] Figure 5 It is a structural diagram of the auxiliary mechanism;

[0025] Figure 6 Schematic diagram of the structure of the first plug;

[0026] Figure 7 is a cross-sectional view of the first insertion rod;

[0027] Figure 8 Schematic diagram of the connection structure of the second plug rod, the slider and the first guide rod;

[0028] Figure 9 This is a cross-sectional view of the mud seat;

[0029] Figure 10 Schematic diagram of the connection structure between the mud-entering support rod and the driving mechanism;

[0030] Figure 11 Schematic diagram of the connection structure between the tamping mechanism and the base;

[0031] Figure 12 Schematic diagram of the structure of the tamping ring;

[0032] Figure 13 Schematic diagram of the connection structure between the lifting assembly and the base.

[0033] in:

[0034] Pile leg 1, base 2, mud-entering support rod 3, driving mechanism 4, compacting mechanism 5, auxiliary mechanism 6, through-hole 7;

[0035] Second screw 41, slip ring 42, second motor 43, lifting block 44, oil cylinder 45, second guide rod 46;

[0036] Tamping ring 51, lifting assembly 52, groove 53;

[0037] Connecting rod 521, electromagnet 522;

[0038] Mud entry seat 61, power assembly 62, first insertion rod 63, second insertion rod 64, through hole 65;

[0039] Cylindrical section 611, conical section 612;

[0040] A first motor 621 , a first screw rod 622 , a lifting plate 623 , a first guide rod 624 , a slider 625 , and a guide plate 626 . DETAILED DESCRIPTION

[0041] like Figure 1-13 As shown, an offshore platform pile shoe in this embodiment includes a pile leg 1, a base 2, and a plurality of mud-entering struts 3. The pile leg 1 is vertically arranged, the base 2 is fixedly arranged at the bottom end of the pile leg 1, and the plurality of mud-entering struts 3 are evenly distributed circumferentially around the pile leg 1. The mud-entering struts 3 are arranged obliquely. There are three mud-entering struts 3, each of which is connected to a driving mechanism 4 for driving the mud-entering struts 3 to be inserted into the seabed. A tamping mechanism 5 and an auxiliary mechanism 6 are provided on the base 2.

[0042] The auxiliary mechanism 6 includes a mud-entering seat 61, which is hollow and has a conical bottom. A power assembly 62, a first plugging rod 63 and a plurality of second plugging rods 64 are provided in the mud-entering seat 61. The plurality of second plugging rods 64 are evenly distributed circumferentially with the vertical axis of the mud-entering seat 61 as the center. The first plugging rod 63 is vertically arranged, and the bottom end of the first plugging rod 63 movably passes through the bottom of the mud-entering seat 61. The top end of the first plugging rod 63 is connected to the power assembly 62, and the power assembly 62 drives the first plugging rod 63 to rise and fall. The side of the mud-entering seat 61 is provided with a plurality of through holes 65, and the plurality of through holes 65 correspond to the plurality of second plugging rods 64 one to one. One end of the second plugging rod 64 is inserted into the through hole 65, and the other end of the second plugging rod 64 is connected to the power assembly 62, and the power assembly 62 drives the second plugging rod 64 to move along the length direction of the second plugging rod 64;

[0043] The tamping mechanism 5 includes a tamping ring 51 and a plurality of lifting assemblies 52. The axis of the tamping ring 51 is arranged vertically. The plurality of lifting assemblies 52 are evenly arranged on the base 2 around the pile leg 1. The lifting assemblies 52 are connected to the tamping ring 51 and drive the tamping ring 51 to move up and down.

[0044] During use, first, the base 2 is placed on the seabed, and the mud-entering seat 61 is inserted into the seabed. Subsequently, the mud-entering support rod 3 is tilted and inserted into the seabed through the driving mechanism 4. At the same time, the second insertion rod 64 is moved downward by the power component 62, so that the first insertion rod 63 is inserted into the seabed. In addition, the second insertion rod 64 is also driven by the power component 62 to tilt and insert into the seabed. In this way, the overall depth of the pile shoe inserted into the seabed can be increased, and the stability can be improved. Secondly, the tamping ring 51 is driven to rise and fall back and forth by the lifting component 52, so that the tamping ring 51 hits the seabed back and forth, so that the seabed at the pile shoe is compacted to prevent the loose soil from affecting the stability.

[0045] The power assembly 62 includes a first motor 621 and a first screw 622. The first screw 622 is vertically arranged, and the top end of the first screw 622 is connected to the first motor 621. The top end of the first insertion rod 63 is threadedly sleeved on the first screw 622. The first screw 622 is threadedly connected to a lifting plate 623. A plurality of first guide rods 624 are fixedly provided on the lifting plate 623. The first guide rods 624 are horizontally arranged, and the plurality of first guide rods 624 correspond one to one with the plurality of second insertion rods 64. A slider 625 is movably connected to the first guide rod 624, and the slider 625 is fixedly connected to the second insertion rod 64.

[0046] When the first motor 621 is driven, the first screw 622 is driven to rotate. When the first screw 622 rotates, the lifting plate 623 is driven to rise or fall. The movement of the lifting plate 623 drives the first guide rod 624 to move synchronously. When the first guide rod 624 descends, the second insertion rod 64 is driven by the slider 625 to move downward in a direction away from the axis of the mud entry seat 61, and the slider 625 is moved on the first guide rod 624 in a direction away from the axis of the mud entry seat 61. When the first guide rod 624 rises, the slider 625 and the second insertion rod 64 are driven to move in the opposite direction. In addition, the rotation of the first screw 622 also drives the first screw 622 to rise and fall.

[0047] A plurality of guide plates 626 are provided on the outer peripheral wall of the first insertion rod 63. The plurality of guide plates 626 are evenly distributed circumferentially with the first insertion rod 63 as the center. A plurality of chute grooves are provided at the bottom of the mud entry seat 61. The plurality of chute grooves correspond to and match the plurality of guide plates 626 one by one. The guide plates 626 pass through the chute grooves. The cooperation between the guide plates 626 and the chute grooves guides the first insertion rod 63 when it is raised or lowered. At the same time, when the first insertion rod 63 is inserted into the seabed, the guide plates 626 are driven to be inserted into the seabed, so as to further improve stability.

[0048] The mud inlet seat 61 includes a cylindrical section 611 and a conical section 612 distributed vertically, and the cylindrical section 611 and the conical section 612 are coaxially arranged;

[0049] The through hole 65 is provided on the cone section 612;

[0050] The bottom end of the first insertion rod 63 and the bottom end of the guide plate 626 are both on the same conical surface as the outer wall of the cone section 612;

[0051] The lifting assembly 52 includes a connecting rod 521 and an electromagnet 522. The connecting rod 521 vertically passes through the tamping ring 51. The bottom end of the connecting rod 521 is fixedly arranged on the top of the base 2. The electromagnet 522 is fixedly arranged on the top of the connecting rod 521. A gap is provided between the tamping ring 51 and the electromagnet 522. During tamping, the electromagnet 522 is intermittently energized. When the electromagnet 522 is energized, the tamping ring 51 is actually made of iron, so that the electromagnet 522 and the tamping ring 51 generate a mutual attraction force, which causes the tamping ring 51 to move upward on the connecting rod 521. When the electromagnet 522 is de-energized, the tamping ring 51 descends under its own gravity and hits the seabed. This reciprocating process achieves intermittent tamping of the seabed.

[0052] The bottom of the tamping ring 51 is concave to form a groove 53. The top of the base 2 is inserted into the groove 53. The top of the groove 53 fits with the top of the base 2. During the reciprocating movement of the tamping ring 51, it intermittently hits the base 2, so that the seabed facing the base 2 is compacted.

[0053] The driving mechanism 4 includes a second screw 41 and a slip ring 42. The second screw 41 is vertically arranged. The top of the second screw 41 is connected to a second motor 43. The second screw 41 is screwed to a lifting block 44. One end of the mud-entering support rod 3 is hinged to the lifting block 44. The other end of the mud-entering support rod 3 is an insertion end. The slip ring 42 is movably sleeved on the mud-entering support rod 3. The slip ring 42 is connected to an oil cylinder 45. The cylinder body of the oil cylinder 45 is hinged to the top of the base 2, and the piston end of the oil cylinder 45 is hinged to the slip ring 42.

[0054] A second guide rod 46 is vertically passed through the lifting block 44, and the second guide rod 46 is fixedly mounted on the base 2;

[0055] The second motor 43 is started to rotate the second screw 41, thereby raising and lowering the lifting block 44. When the lifting block 44 rises, it drives the mud-entering prop 3 to be inserted into the seabed. In addition, the oil cylinder 45 drives the mud-entering prop 3 to rotate around the hinge point between the mud-entering prop 3 and the lifting block 44, which can adjust the angle of the mud-entering prop 3 when it is inserted into the seabed.

[0056] The insertion end of the mud-entering support rod 3 is tapered;

[0057] The base 2 is provided with a plurality of through slots 7, each of which corresponds to a plurality of mud-entering support rods 3, and the mud-entering support rods 3 pass through the through slots 7;

[0058] In summary, by inserting the mud-entering seat 61, the first insertion rod 63 and the second insertion rod 64 into the seabed, the seabed insertion depth is increased and the stability is improved. At the same time, by tamping the seabed through the tamping ring 51, the stability can be further improved.

[0059] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A marine platform pile shoe, comprising a pile leg (1), a base (2) and a plurality of mud-entering struts (3), wherein the pile leg (1) is arranged vertically, the base (2) is fixedly arranged at the bottom end of the pile leg (1), the plurality of mud-entering struts (3) are circumferentially distributed around the pile leg (1), the mud-entering struts (3) are arranged obliquely, and each mud-entering strut (3) is connected to a driving mechanism (4), the driving mechanism (4) is used to drive the mud-entering struts (3) to be inserted into the seabed, and is characterized in that: The base (2) is provided with a tamping mechanism (5) and an auxiliary mechanism (6); The auxiliary mechanism (6) includes a mud entry seat (61), the mud entry seat (61) is hollow, the bottom of the mud entry seat (61) is conical, a power assembly (62), a first insertion rod (63) and a plurality of second insertion rods (64) are arranged in the mud entry seat (61), the plurality of second insertion rods (64) are circumferentially distributed around the vertical axis of the mud entry seat (61), the first insertion rod (63) is arranged vertically, the bottom end of the first insertion rod (63) is movable through the bottom of the mud entry seat (61), and the first insertion rod (63) is arranged vertically. ) is connected to the power assembly (62), the power assembly (62) drives the first insertion rod (63) to move up and down, a plurality of through holes (65) are provided on the side of the mud entry seat (61), the plurality of through holes (65) correspond one to one with a plurality of second insertion rods (64), one end of the second insertion rod (64) is inserted into the through hole (65), the other end of the second insertion rod (64) is connected to the power assembly (62), and the power assembly (62) drives the second insertion rod (64) to move along the length direction of the second insertion rod (64); The tamping mechanism (5) comprises a tamping ring (51) and a plurality of lifting assemblies (52), wherein the axis of the tamping ring (51) is arranged vertically, and the plurality of lifting assemblies (52) are evenly arranged on the base (2) in a circumferential direction with the pile leg (1) as the center, and the lifting assemblies (52) are connected to the tamping ring (51), and the lifting assemblies (52) drive the tamping ring (51) to reciprocate and rise and fall; The power assembly (62) includes a first motor (621) and a first screw (622), the first screw (622) is vertically arranged, the top end of the first screw (622) is connected to the first motor (621), the top end of the first insertion rod (63) is threadedly sleeved on the first screw (622), the first screw (622) is threadedly connected to a lifting plate (623), a plurality of first guide rods (624) are fixedly arranged on the lifting plate (623), the first guide rods (624) are horizontally arranged, the plurality of first guide rods (624) correspond one to one with the plurality of second insertion rods (64), a slider (625) is movably connected to the first guide rod (624), and the slider (625) is fixedly connected to the second insertion rod (64); The lifting assembly (52) comprises a connecting rod (521) and an electromagnet (522), wherein the connecting rod (521) vertically passes through the tamping ring (51), the bottom end of the connecting rod (521) is fixedly arranged on the top of the base (2), and the electromagnet (522) is fixedly arranged on the top end of the connecting rod (521), and a gap is provided between the tamping ring (51) and the electromagnet (522).

2. The offshore platform pile shoe according to claim 1, characterized in that: A plurality of guide plates (626) are provided on the outer peripheral wall of the first insertion rod (63), and the plurality of guide plates (626) are evenly distributed circumferentially with the first insertion rod (63) as the center. A plurality of slide grooves are provided at the bottom of the mud entry seat (61), and the plurality of slide grooves correspond to and match the plurality of guide plates (626) one by one, and the guide plates (626) pass through the slide grooves.

3. The offshore platform pile shoe according to claim 2, characterized in that: The mud entry seat (61) comprises a cylindrical section (611) and a cone section (612) distributed vertically, and the cylindrical section (611) and the cone section (612) are coaxially arranged.

4. The offshore platform pile shoe according to claim 3, characterized in that: The bottom end of the first insertion rod (63) and the bottom end of the guide plate (626) are both located on the same conical surface as the outer wall of the cone section (612).

5. The offshore platform pile shoe according to claim 3, characterized in that: The through hole (65) is provided on the cone segment (612).

6. The offshore platform pile shoe according to claim 1, characterized in that: The bottom of the tamping ring (51) is concave to form a groove (53), the top of the base (2) is inserted into the groove (53), and the top of the groove (53) is in contact with the top of the base (2).

7. The offshore platform pile shoe according to claim 1, characterized in that: The driving mechanism (4) includes a second screw (41) and a slip ring (42). The second screw (41) is vertically arranged. The top end of the second screw (41) is connected to a second motor (43). The second screw (41) is screwed to a lifting block (44). One end of the mud-entering support rod (3) is hinged to the lifting block (44). The other end of the mud-entering support rod (3) is an insertion end. The slip ring (42) is movably sleeved on the mud-entering support rod (3). The slip ring (42) is connected to an oil cylinder (45). The cylinder body of the oil cylinder (45) is hinged to the top of the base (2). The piston end of the oil cylinder (45) is hinged to the slip ring (42).

8. The offshore platform pile shoe according to claim 7, characterized in that: A second guide rod (46) is vertically passed through the lifting block (44), and the second guide rod (46) is fixedly arranged on the base (2).

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