Nested telescopic berthing pile

Abstract

The invention provides a nested telescopic berthing pile which comprises a hollow annular box, hydraulic cylinders, cushion blocks, an integrated hydraulic station, a vibrating pile hammer, an inner pile, a hydraulic holder and an outer pile, the hollow annular box and the top of the outer pile are welded together, the multiple hydraulic cylinders are annularly installed on the hollow annular box, the heads of rod bodies of the hydraulic cylinders are connected with plug pins, and the plug pins are connected with the cushion blocks. The bottom of the hydraulic station is connected with the hollow annular box through the buffering element, the lower portion of the vibration type pile hammer is provided with a clamp which clamps the top of the inner pile, the hydraulic clamp clamps the inner pile, and annular groove type mechanical check rings are welded to the two limiting positions of the upper portion and the lower portion of the inner pile. The groove is matched with the cushion block of the hydraulic clamp holder, so that the inner pile and the outer pile are fixed together, and the whole body is in two telescopic length states. The nested telescopic gauge pile overcomes the defects of the integral gauge pile, and is low in integral gravity center, safe in pile frame structure and high in operation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a nested telescopic mooring pile. Background Art

[0002] 1. Positioning pile form: (1) The positioning piles of the dredger are in the form of "pencil piles". The piles are placed in the mud surface at a shallow depth by free fall. There is a certain degree of flexibility between the pile and the soil. The piles are flexibly connected to the hull by a trolley. The positioning piles can realize the positioning, swinging and displacement of the hull. The characteristic is that it is easy to pile and pull out the piles. However, due to the small depth of the piles placed in the mud by free fall, the carrying capacity is limited.

[0003] (2) Impact piling is widely used both on land and at sea. It can bear loads both vertically and horizontally, but it is usually difficult to pull out once driven in.

[0004] (3) Flexible mooring (positioning) piles are usually steel pipe piles. The upper end of the flexible mooring pile is not constrained, and will produce a large horizontal deformation under the impact of the ship. It is equivalent to a cantilever beam embedded in the soil. Its working characteristic is to use its own large deformation to absorb the impact energy of the ship.

[0005] 2. Piling method: At present, the commonly used piling methods include free fall, static pressure, impact, high-frequency vibration and so on.

[0006] High-frequency vibration piling achieves soil liquefaction through high-frequency vibration, so it is easy to drive and pull piles, and the driving and pulling process has little impact on the pile body. It meets the requirements of pile driving and pulling piles, horizontal load bearing, and fast operation, and is an ideal way to position pile systems for transfer platforms.

[0007] In various piling application scenarios, special lifting equipment such as piling ships or ship-borne crawler cranes are often used.

[0008] For emergency missions that require frequent transfers in high sea conditions, a more appropriate solution is to configure a separate pile driver and corresponding lifting mechanism for each positioning pile on the floating platform.

[0009] Integral positioning piles have certain technical defects. Their length is usually more than 30 meters to ensure that the depth of penetration into the mud can reach 10 meters. This is likely to cause two problems: (1) In order to improve work efficiency, the positioning pile is in a vertical state and is hung on the pile frame by a pile hammer. During transportation, due to the large weight of the pile hammer and the high overall center of gravity, it is easy to cause structural safety problems of the truss pile frame when the ship is shaking; (2) In order to avoid the high center of gravity, the pile hammer needs to be stored on the deck during shipping. Before piling, the pile hammer needs to be lifted to a sufficient height, exceeding the top of the pile body, and then moved horizontally to the top of the pipe pile, lowered and clamped. This greatly affects the work efficiency. Summary of the invention

[0010] In order to make up for the deficiencies of the prior art, the embodiment of the present application proposes a nested telescopic mooring pile to solve the problems existing in the prior art.

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions: A nested telescopic mooring pile comprises a hollow annular box, a hydraulic cylinder, a cushion block, an integrated hydraulic station, a vibrating pile hammer, an inner pile, a hydraulic clamp and an outer pile. The hollow annular box is welded to the top of the inner pile, a plurality of hydraulic cylinders are annularly mounted on the hollow annular box, the heads of the hydraulic cylinder rods are connected to the cushion block, the bottom of the hydraulic station is connected to the hollow annular box via a buffer element, the lower part of the vibrating pile hammer is provided with a clamp for clamping the top of the inner pile, the hollow annular box is sleeved in the middle of the inner pile, the hydraulic clamp clamps the bottom of the inner pile, and the other end of the hydraulic clamp clamps the outer pile.

[0012] As a further technical solution of the present invention: the cushion block has a serrated concave arc surface.

[0013] As a further technical solution of the present invention: the outer pile is a steel pipe pile.

[0014] As a further technical solution of the present invention: the inner pile is an open pipe pile.

[0015] As a further technical solution of the present invention: the outer pile is an open pipe pile.

[0016] As a further technical solution of the present invention: the outer wall of the inner pile is installed with an extreme limit to limit the maximum telescopic stroke of the inner pile. The limit includes a mechanical stroke limit and a mechanical retaining ring in the form of an annular groove. When the hydraulic cylinder is extended, the cushion block can be completely stuck in the groove retaining ring.

[0017] As a further technical solution of the present invention: the pile hammer is connected to the hook pulley block through a sling and is driven by a wire rope winch device to achieve lifting.

[0018] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: The nested telescopic positioning pile of the present invention overcomes the defects of the aforementioned integral positioning pile, has a low overall center of gravity, a safe pile frame structure and high operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the hollow annular box of the present invention.

[0020] Figure 2 It is a top view of the hollow annular box of the present invention.

[0021] Figure 3 This is a schematic diagram of the piling state of the present invention, in which the inner pile is retracted and the clamp is clamped at the top limit of the inner pile.

[0022] Figure 4 This is a schematic diagram of the process in which the outer pile of the present invention has been inserted into the mud and the inner pile is being pulled out.

[0023] Figure 5 The pile pulling of the present invention is completed, the inner pile is pulled up to the top limit, and the clamp is clamped at the bottom limit of the inner pile, forming a schematic diagram of a ship-mooring pile.

[0024] In the figure: 1-hollow annular box; 2-hydraulic cylinder; 3-pad; 4-integrated hydraulic station; 5-water pump rotor group; 6-clamping external pile; 7-hydraulic clamp; 8-external pile. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention proposes a nested telescopic berthing pile, comprising a hollow annular box 1, a hydraulic cylinder 2, a cushion block 3, an integrated hydraulic station 4, a vibrating pile hammer 5, an inner pile 6, a hydraulic clamp 7 and an outer pile 8. The hollow annular box 1 is welded to the top of the inner pile, and a plurality of hydraulic cylinders 2 are annularly mounted on the hollow annular box 1. The head of the rod body of the hydraulic cylinder 2 is connected to the cushion block 3. The bottom of the hydraulic station 4 is connected to the hollow annular box 1 through a buffer element. The vibrating pile hammer 5 has a clamp at the bottom to clamp the top of the inner pile 6. The hydraulic clamp 7 is initially located at the upper limit position of the inner pile 6 and is in a clamping state. The vibrating pile hammer 5 starts the vibrating pile driving mode until the pile driving operation is completed and the outer pile is put into the mud. The hydraulic cylinder 2 of the hydraulic clamp 7 is retracted to disengage the inner pile 6 from the outer pile 8. In the vibration pile pulling mode of the vibrating pile hammer (5), the inner pile 6 is lifted. After reaching the lower limit position of the inner pile 6, the hydraulic cylinder 2 of the hydraulic clamp 7 is extended to clamp the inner pile 6.

[0027] The cushion block 3 has a relatively wide outer profile with a serrated concave arc surface to increase the friction clamping force with the inner pile so that the inner and outer piles are connected as a whole.

[0028] The hydraulic device of the hydraulic clamp needs to be well sealed and have a high waterproof level. In addition, the bottom of the hydraulic station 4 is connected to the hollow annular box 1 through a buffer element to achieve buffering and protect the electrical and hydraulic components in the hydraulic station.

[0029] The vibrating pile hammer 5 is connected to the hook pulley block through a sling and is driven by a wire rope winch device to achieve lifting.

[0030] The vibrating pile hammer 5 has a clamp at the bottom to clamp the top of the inner pile 6 (steel pipe pile).

[0031] Both the inner pile 6 and the outer pile 8 are open-end pipe piles.

[0032] The outer wall of the inner pile is installed with an extreme limiter to limit the maximum telescopic stroke of the inner pile. The limiter includes a mechanical stroke limiter and a mechanical retaining ring in the form of an annular groove. When the hydraulic cylinder 2 is extended, the pad 3 can be completely stuck in the groove retaining ring. Ensure that when the pile hammer vibrates, the inner and outer piles are combined into a whole.

[0033] Working method: 1. The hydraulic cylinders of the hydraulic clamp extend at the same time and press to the set hydraulic pressure to clamp the inner and outer piles; 2. The vibrating pile hammer starts to liquefy the soil, and the entire pile body continues to sink into the mud under its own weight; 3. When the pile hammer reaches the set low position (e.g. the outer pile is 10 meters into the mud), the pile hammer stops moving. The hydraulic cylinder of the hydraulic clamp retracts, and the inner and outer piles are disengaged. The pile hammer starts, and at the same time, the lifting winch of the pile hammer lifts the outer pile upward, and the inner pile moves relatively to the lower limit position (maximum extension); 4. The hydraulic cylinder of the hydraulic clamp extends again, and the inner and outer piles are clamped and fixed to form flexible positioning piles.

[0034] The pile extraction process is the opposite of the above process.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0036] In addition, it should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment have also been appropriately combined to form other implementation modes that are easy for those skilled in the art to understand.

Claims

1. A nested telescopic mooring pile, comprising a hollow annular box (1), a hydraulic cylinder (2), a cushion block (3), an integrated hydraulic station (4), a vibrating pile hammer (5), an inner pile (6), a hydraulic clamp (7) and an outer pile (8), characterized in that: The hollow annular box (1) is welded to the top of the outer pile. A plurality of hydraulic cylinders (2) are annularly mounted on the hollow annular box (1). The heads of the rods of the hydraulic cylinders (2) are connected to the pads (3). The bottom of the hydraulic station (4) is connected to the hollow annular box (1) via a buffer element. The vibrating pile hammer (5) has a clamp at the bottom to clamp the top of the inner pile (6). The hydraulic clamp (7) is initially located at the upper limit position of the inner pile (6) and is in a clamping state. The vibrating pile hammer (5) starts a vibrating pile driving mode until the pile driving operation is completed and the outer pile is driven into the mud. The hydraulic cylinder (2) of the hydraulic clamp (7) is retracted to disengage the inner pile (6) from the outer pile (8). In the vibration pile pulling mode of the vibrating pile hammer (5), the inner pile (6) is lifted. After reaching the lower limit position of the inner pile (6), the hydraulic cylinder (2) of the hydraulic clamp (7) is extended to clamp the inner pile (6).

2. The nested telescopic mooring pile according to claim 1, characterized in that: The cushion block (3) has a sawtooth-shaped concave arc surface.

3. The nested telescopic mooring pile according to claim 1, characterized in that: The outer pile (6) is a steel pipe pile.

4. The nested telescopic mooring pile according to claim 1, characterized in that: The inner pile (6) is an open-end pipe pile.

5. The nested telescopic mooring pile according to claim 1, characterized in that: The outer pile (8) is an open-end pipe pile.

6. The nested telescopic mooring pile according to claim 1, characterized in that: The outer wall of the inner pile (4) is provided with an extreme limiter to limit the maximum telescopic stroke of the inner pile. The limiter comprises a mechanical stroke limiter and a mechanical retaining ring in the form of an annular groove. When the hydraulic cylinder (2) is in an extended state, the cushion block (3) can be completely stuck in the retaining ring of the groove.

7. The nested telescopic mooring pile according to claim 1, characterized in that: The pile hammer (5) is connected to the hook pulley block via a sling and is driven by a wire rope winch device to achieve lifting.

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