Working method of pile gripper for self-elevating offshore pile stabilizing platform

Abstract

The present invention provides a working method of a self-elevating offshore pile stabilizing platform pile gripper, including a fixed base, an adjustable base and a hydraulic system, any adjustable base includes a cylinder assembly and a movable cylinder base, any fixed base includes an upper and lower double-layer cylinder assembly and a cylinder base fastened and installed on the deck, the hydraulic system is respectively connected to the cylinder assemblies of the fixed base and the adjustable base, the working end of any cylinder assembly can be independently telescopic and movable, and the multiple working ends of the fixed base and the adjustable base cooperate to fix the steel pipe pile. The present invention adjusts the steel pipe pile forward, backward, left and right by telescoping the cylinder assembly of the adjustable base, so that the steel pipe pile meets the installation requirements, fixes the steel pipe pile between the cylinders by the cylinder assembly of the fixed base, plays a supporting and guiding role, and can adapt to the operation of steel pipe piles with different pile diameters, the cylinder base is a steel frame structure, has good mechanical properties and plasticity, reliable structure, and can better ensure the flatness and verticality of a single pile.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power engineering equipment, and in particular to a working method of a pile gripper of a self-elevating offshore pile stabilizing platform. Background Art

[0002] Offshore wind energy resources are very rich, and there are wind resource conditions for large-scale development of offshore wind power. Under the increasingly severe situation of energy conservation and emission reduction, energy shortage, and energy supply security, offshore wind power as a typical clean energy has received more and more attention. Single pile foundation accounts for the highest proportion in wind power construction foundation. The existing large single pile foundation has a diameter of 4.2~7m, an average pile length of about 60~92m, and an average pile weight of 550~900t. The construction quality and verticality control of the single pile foundation are relatively high (flatness ≤50cm, verticality ≤3%).

[0003] The existing Chinese patent with publication number CN213952226U discloses a pile gripper for a pile stabilizing platform, including a pile gripping base, a first movable arm and a second movable arm are hinged on the pile gripping base, and a jacking device is provided on the first movable arm and the second movable arm; one end of the first movable arm and the second movable arm is hinged on the pile gripping base through a vertically arranged rotating shaft, and a driving cylinder for driving the rotation of the first movable arm and the second movable arm and the pile gripping base is respectively provided; the first movable arm and the second movable arm have one end away from the pile gripping base as a movable end, and are connected by a vertically arranged latch; the movable end of the first movable arm is provided with a positioning hole that cooperates with the latch, and the movable end of the second movable arm is provided with a pin hole that cooperates with the positioning hole and the latch; encoders are connected to the rotating shafts of the first movable arm and the second movable arm, and the latch is connected to an adjusting cylinder, and the two encoders are respectively connected to the adjusting cylinder and the corresponding driving cylinder for communication and control.

[0004] However, the current pile stabilization platform pile grippers still have the following disadvantages: First, the existing pile stabilization platform pile grippers are relatively large in structure and have high manufacturing costs. Second, the single-layer claw structure cannot be finely adjusted to ensure verticality. Third, the pile stabilization platform pile grippers are welded as a whole, and the size and position of the claws are limited, which is not enough to cope with wind power piles of various sizes.

[0005] Therefore, the inventors believe that it is necessary to provide a self-elevating offshore pile stabilizing platform pile gripper that can solve the defects of poor versatility, low adjustment accuracy and high construction cost of the original pile gripper, can better ensure the flatness and verticality of the single pile, can meet the construction of various single pile foundations, has lower cost, and has good correction performance and universality. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide a working method of a pile gripper of a self-elevating offshore pile stabilizing platform.

[0007] A self-elevating offshore pile stabilizing platform pile gripper provided by the present invention comprises: a fixed base, an adjustable base and a hydraulic system, with a horizontal plane as an XY plane and the center of a steel pipe pile operation area as the origin, a plurality of the fixed bases are respectively arranged on the X and Y axes, and the adjustable base is arranged in any quadrant;

[0008] Any of the adjustable bases includes a cylinder assembly and a movable cylinder base, and any of the fixed bases includes an upper and lower double-layer cylinder assembly and a cylinder base fastened to the deck. The hydraulic system is respectively connected to the cylinder assemblies of the fixed base and the adjustable base, and the working end of any of the cylinder assemblies can be independently telescopically moved. The multiple working ends of the fixed base and the adjustable base cooperate to fix the steel pipe piles.

[0009] Preferably, the telescopic directions of the working ends of the upper cylinder assembly of the fixed base and the cylinder assembly of the adjustable base are located in the same plane.

[0010] Preferably, the telescopic directions of the working ends of the upper and lower double-layer cylinder assemblies of the same fixed base are consistent, and the two telescopically move synchronously.

[0011] Preferably, the three fixed bases are respectively arranged on the positive half axis of the X-axis and the Y-axis, one adjustable base is respectively arranged in each of the four quadrants, and the extension direction of the working end of the cylinder assembly points to the origin.

[0012] Preferably, a driving device is provided inside the movable cylinder base of the adjustable base arranged in the second quadrant and the third quadrant, and the adjustable base can move along the Y direction.

[0013] Preferably, the hydraulic system comprises: an oil tank, a motor pump group, a hydraulic valve group and a pipeline assembly, the output end of the oil tank is connected in parallel with two groups of the motor pump groups, and the output end of the motor pump group is connected in parallel with ten groups of cylinder hydraulic modules.

[0014] Preferably, the motor pump group includes: an AC motor, a gear pump, and a first oil suction filter. The output end of the oil tank is connected to the input end of the gear pump, and the output end of the gear pump is connected to the input end of the one-way valve. Overflow valves are provided upstream and downstream of the one-way valve.

[0015] Preferably, any of the cylinder hydraulic modules comprises: a three-position four-way solenoid valve, a hydraulically controlled one-way valve, and a valve block connected in sequence, and a stop valve is provided between the output end of the one-way valve and the three-position four-way solenoid valve.

[0016] According to a working method of a self-elevating offshore pile stabilizing platform pile gripper provided by the present invention, the self-elevating offshore pile stabilizing platform pile gripper is used, and the method comprises the following steps:

[0017] Step S1, the working ends of the oil cylinder assemblies of the fixed base and the adjustable base are both in a retracted state, and the steel pipe pile is hoisted into the steel pipe pile working area in the pile gripper;

[0018] Step S2, after the steel pipe pile is hoisted into the pile gripper, the steel pipe pile can be adjusted forward, backward, left, and right by moving the oil cylinder assembly on the adjustable base, and real-time feedback is provided by a sensor measuring the verticality of the steel pipe until the steel pipe pile reaches the installation requirements;

[0019] Step S3, by extending and retracting the working end of the oil cylinder assembly on the fixed base, the steel pipe pile is fixed between the oil cylinders to play a supporting and guiding role, preventing the steel pipe pile from moving left and right, and guiding the installation of the steel pipe pile. By adjusting the extension distance of the working end, it can adapt to the operation of steel pipe piles with different pile diameters;

[0020] Step S4, pile laying.

[0021] Preferably, in step S4, the verticality of the steel pipe pile needs to be monitored during the process of lowering the steel pipe pile. If the steel pipe pile is offset, the steel pipe pile can be adjusted forward, backward, left and right by moving the cylinder assembly on the adjustable base, and real-time feedback can be obtained through a sensor that measures the verticality of the steel pipe until the steel pipe pile meets the installation requirements. The steel pipe pile is then fixed between the cylinders by extending and retracting the working end of the cylinder assembly on the fixed base before the pile is lowered.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention adjusts the steel pipe piles forward, backward, left and right through the extension and retraction of the oil cylinder assembly of the adjustable base, so that the steel pipe piles meet the installation requirements, and fixes the steel pipe piles between the oil cylinders through the oil cylinder assembly of the fixed base, which plays a supporting and guiding role, prevents the steel pipe piles from moving left and right, and plays a guiding role for the installation of the steel pipe piles; by adjusting the extension distance of the oil cylinder assembly of the adjustable base and the fixed base, it can adapt to the operation of steel pipe piles with different pile diameters, the oil cylinder base is a steel frame structure, has good mechanical properties and plasticity, reliable structure, easy to use, solves the defects of the original pile gripper with poor versatility, low adjustment accuracy and high construction cost, can better ensure the flatness and verticality of the single pile, can meet the construction of various single pile foundations, has lower cost, and has good correction performance and universality.

[0024] 2. The present invention ensures the safety and stability of the pile gripper through cooling, filtering and overload protection devices in the hydraulic system. The hydraulically controlled one-way valve is located at the outlet of the valve group to achieve long-term pressure maintenance of the hydraulic cylinder and ensure that the pressure in the hydraulic cylinder can achieve clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 This is a top view of the pile gripper of the self-elevating offshore pile stabilizing platform mainly embodied in the present invention;

[0027] Figure 2 This is a front view of a pile gripper of a self-elevating offshore pile stabilizing platform, which is mainly embodied in the present invention;

[0028] Figure 3 The present invention mainly embodies the hydraulic system schematic diagram of the pile gripper of the self-elevating offshore pile stabilizing platform.

[0029] As shown in the figure:

[0030] DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] Example 1

[0033] like Figure 1-3 As shown, a self-elevating offshore pile stabilizing platform pile gripper provided by the present invention includes: a fixed base 100, an adjustable base 200 and a hydraulic system. The horizontal plane is the XY plane, the center of the steel pipe pile operation area is the origin, and multiple fixed bases 100 are respectively arranged on the X and Y axes, and an adjustable base 200 is arranged in any quadrant. Any adjustable base 200 includes a cylinder assembly and a movable cylinder base. Any fixed base 100 includes an upper and lower double-layer cylinder assembly and a cylinder base fastened to the deck to adapt to the operation of steel pipe piles with different pile diameters. The hydraulic system is connected to the cylinder assemblies of the fixed base 100 and the adjustable base 200 respectively, and the operating end of any cylinder assembly can be independently telescopic and movable, and multiple operating ends of the fixed base 100 and the adjustable base 200 cooperate to fix the steel pipe piles.

[0034] The three fixed bases 100 are respectively arranged on the positive half axis of the X-axis and the Y-axis, and an adjustable base 200 is respectively arranged in each of the four quadrants. The extension direction of the working end of the cylinder assembly points to the origin. The telescopic directions of the working ends of the upper and lower double-layer cylinder assemblies of the same fixed base 100 are consistent, and the two telescopic movements are synchronized. The telescopic directions of the working ends of the upper cylinder assembly of the fixed base 100 and the cylinder assembly of the adjustable base 200 are located in the same plane.

[0035] The upper and lower double-layer oil cylinder assemblies of the fixed base 100 are used to hold the steel pipe piles in double layers, and the fixed support ensures the verticality of the steel pipe piles in the air. The oil cylinder base of the fixed base 100 is generally welded on the deck. The oil cylinder base uses a steel structure truss as the base of the upper and lower double-layer oil cylinder assemblies to ensure the oil cylinder assembly's ability to hold the steel pipe piles in double layers, and provide sufficient rigidity to ensure the accuracy of the operation.

[0036] The movable cylinder base of the adjustable base 200 arranged in the first quadrant and the fourth quadrant is installed obliquely on the steel structure truss, so that the extension direction of the working end of the cylinder assembly points to the central area of ​​the steel pipe pile. The cylinder assembly is used to fix and clamp the steel pipe pile on the oblique surface, and cooperates with the double-layer fixation and clamping on the opposite side to ensure the underwater verticality of the steel pipe pile and guide it, so as to realize oblique correction.

[0037] The movable cylinder base of the adjustable base 200 arranged in the second and third quadrants can be installed inside the hull, and a driving device is arranged inside the movable cylinder base, and the adjustable base 200 can move along the Y direction. The movable cylinder base slides in the left and right directions through the top push of the built-in cylinder, so that the steel pipe pile can enter the pile holding range. The movable cylinder base is used to position and install the cylinder assembly to adapt to the operation of steel pipe piles with different pile diameters.

[0038] The hydraulic system includes: oil tank 14, motor pump group, hydraulic valve group, pipeline assembly, air-cooled heat exchanger, hydraulic auxiliary parts and electrical components, etc. The output end of the oil tank 14 is connected in parallel with two motor pump groups to meet the flow requirements of the pile gripper, and the output end of the motor pump group is connected in parallel with ten cylinder hydraulic modules. The hydraulic system is connected to the pile gripper through a hydraulic hose.

[0039] The motor pump group includes: an AC motor 1, a gear pump 2, a first oil suction filter 3, the output end of the oil tank 14 is connected to the input end of the gear pump 2, the output end of the gear pump 2 is connected to the input end of the one-way valve 7, and overflow valves 4 are provided upstream and downstream of the one-way valve 7. There are three overflow valves 4, two of which adjust the pressure of the two oil branches respectively, and the other realizes the overload protection function. The overflow valve 4 upstream of the one-way valve 7 is connected to a pressure gauge 5 and a pressure sensor 6. The pressure sensor 6 can monitor the pump outlet pressure and the oil cylinder pressure chamber pressure, and judge the contact between the pressure wheel and the steel pipe pile through the pressure display. A liquid level gauge 15 and an air filter 16 are provided on the oil tank 14. The oil tank 14 is also connected to a heater 17, a second oil suction filter 12, a return oil filter 13, and a liquid level and temperature switch 18.

[0040] Any oil cylinder hydraulic module includes: a three-position four-way solenoid valve 9, a hydraulically controlled one-way valve 10, and a valve block 11 connected in sequence, and a stop valve 8 is arranged between the output end of the one-way valve 7 and the three-position four-way solenoid valve 9. The hydraulically controlled one-way valve 10 is located at the outlet of the valve group to achieve a long-term pressure-maintaining state of the hydraulic cylinder and ensure that the pressure in the hydraulic cylinder is tightened.

[0041] The specific working principle of the present application is as follows: after the steel pipe pile is hoisted into the pile gripper, the steel pipe pile can be adjusted forward, backward, left and right through the four oil cylinder assemblies on the adjustable base 200, and real-time feedback is provided through the sensor measuring the verticality of the steel pipe until the steel pipe pile reaches the installation requirements. Then, by extending and retracting the six oil cylinder assemblies on the fixed base 100, the steel pipe pile is fixed between the oil cylinders, which plays a supporting and guiding role, prevents the steel pipe pile from moving left and right, and plays a guiding role for the installation of the steel pipe pile. By adjusting the extension distance of the six oil cylinder assemblies, it can adapt to the operation of steel pipe piles with different pile diameters.

[0042] This application has streamlined the structure and improved the integration. The oil cylinder base is a steel frame structure with good mechanical properties and plasticity. The double-layer structure design of the fixed base 100 enables the pile gripper to move forward, backward, left and right after grasping the pile body. The maximum correction force can reach 75 tons, and the combined operation of the oil cylinder can be used to achieve correction in any direction, such as oblique correction. The installation position of the adjustable base 200 on the steel frame is adjustable to ensure the compatibility of the gripper and the single pile. The cooling, filtering and overload protection devices in the hydraulic system ensure the safety and stability of the pile gripper.

[0043] The present application has a reliable structure and is easy to use, and solves the defects of the original pile gripper, such as poor versatility, low adjustment accuracy, and high construction cost. The self-elevating offshore pile stabilizing platform pile gripper of the present application has good stability, can better ensure the flatness and verticality of the single pile, can meet the construction of various single pile foundations, has lower cost, and has good deviation correction performance and universality.

[0044] Example 2

[0045] Based on Example 1, a working method of a self-elevating offshore pile stabilizing platform pile gripper according to the present invention is provided, using the self-elevating offshore pile stabilizing platform pile gripper of Example 1, comprising the following steps:

[0046] Step S1, the working ends of the oil cylinder assemblies of the fixed base 100 and the adjustable base 200 are both in a retracted state, and the steel pipe pile is hoisted into the steel pipe pile working area in the pile gripper;

[0047] Step S2, after the steel pipe pile is hoisted into the pile gripper, the steel pipe pile can be adjusted forward, backward, left, and right by moving the oil cylinder assembly on the adjustable base 200, and real-time feedback is provided by a sensor for measuring the verticality of the steel pipe until the steel pipe pile reaches the installation requirements;

[0048] Step S3, by extending and retracting the working end of the oil cylinder assembly on the fixed base 100, the steel pipe pile is fixed between the oil cylinders to play a supporting and guiding role, preventing the steel pipe pile from moving left and right, and playing a guiding role for the installation of the steel pipe pile. By adjusting the extension distance of the working end, it can adapt to the operation of steel pipe piles with different pile diameters;

[0049] Step S4, pile laying.

[0050] In step S4, the verticality of the steel pipe pile needs to be monitored during the process of lowering the steel pipe pile. If the steel pipe pile is offset, the steel pipe pile can be adjusted forward, backward, left and right by moving the cylinder assembly on the adjustable base 200, and real-time feedback is provided by the sensor measuring the verticality of the steel pipe until the steel pipe pile meets the installation requirements. Then, the steel pipe pile is fixed between the cylinders by extending and retracting the working end of the cylinder assembly on the fixed base 100, and then the pile is lowered.

[0051] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A working method of a pile gripper of a self-elevating offshore pile stabilizing platform, characterized in that: A self-elevating offshore pile stabilizing platform pile gripper is used, the self-elevating offshore pile stabilizing platform pile gripper comprising: a fixed base (100), an adjustable base (200) and a hydraulic system, with a horizontal plane as an XY plane and the center of a steel pipe pile operation area as the origin, a plurality of the fixed bases (100) are respectively arranged on the X and Y axes, and the adjustable base (200) is arranged in any quadrant; Any of the adjustable bases (200) comprises a cylinder assembly and a movable cylinder base, and any of the fixed bases (100) comprises an upper and lower double-layer cylinder assembly and a cylinder base fastened to the deck, the hydraulic system is respectively connected to the cylinder assembly of the fixed base (100) and the adjustable base (200), the working end of any of the cylinder assemblies can be independently telescopically moved, the extension direction of the working end of the cylinder assembly points to the origin, and the multiple working ends of the fixed base (100) and the adjustable base (200) cooperate to fix the steel pipe piles; An adjustable base (200) is respectively arranged in each of the four quadrants, and is used for fixing and clamping the steel pipe piles at an inclined surface. The movable cylinder base of the adjustable base (200) arranged in the first quadrant and the fourth quadrant is obliquely installed on the steel structure truss. The movable cylinder base of the adjustable base (200) arranged in the second quadrant and the third quadrant is installed inside the hull and is provided with a driving device inside. The adjustable base (200) can move along the Y direction. The three fixed bases (100) are respectively arranged on the positive half axis of the X axis and the Y axis, and are used to perform double-layer clamping of the steel pipe piles in a face-to-face manner; The working method of the pile gripper of the self-elevating offshore pile stabilizing platform comprises the following steps: Step S1, the operating ends of the oil cylinder assemblies of the fixed base (100) and the adjustable base (200) are both in a retracted state, and the steel pipe pile is hoisted into the steel pipe pile operating area in the pile gripper; Step S2, after the steel pipe pile is hoisted into the pile gripper, the steel pipe pile can be adjusted forward, backward, left, and right by moving the oil cylinder assembly on the adjustable base (200), and real-time feedback is provided by a sensor for measuring the verticality of the steel pipe until the steel pipe pile reaches the installation requirements; Step S3, by extending and retracting the working end of the oil cylinder assembly on the fixed base (100), the steel pipe pile is fixed between the oil cylinders, which plays a supporting and guiding role, prevents the steel pipe pile from moving left and right, plays a guiding role for the installation of the steel pipe pile, and adjusts the extension distance of the working end to adapt to the operation of steel pipe piles with different pile diameters; Step S4, pile laying.

2. The working method of the pile gripper of the self-elevating offshore pile stabilizing platform according to claim 1, characterized in that: The telescopic directions of the working ends of the oil cylinder assembly on the upper layer of the fixed base (100) and the oil cylinder assembly of the adjustable base (200) are located in the same plane.

3. The working method of the pile gripper of the self-elevating offshore pile stabilizing platform according to claim 1, characterized in that: The telescopic directions of the working ends of the upper and lower double-layer oil cylinder assemblies of the same fixed base (100) are consistent, and the two telescopically move synchronously.

4. The working method of the pile gripper of the self-elevating offshore pile stabilizing platform according to claim 1, characterized in that: The hydraulic system comprises: an oil tank (14), a motor pump group, a hydraulic valve group and a pipeline assembly, wherein the output end of the oil tank (14) is connected in parallel to two groups of the motor pump groups, and the output end of the motor pump group is connected in parallel to ten groups of cylinder hydraulic modules.

5. The working method of the pile gripper of the self-elevating offshore pile stabilizing platform according to claim 4, characterized in that: The motor pump assembly comprises: an AC motor (1), a gear pump (2), and a first oil suction filter (3); the output end of the oil tank (14) is connected to the input end of the gear pump (2); the output end of the gear pump (2) is connected to the input end of a one-way valve (7); and overflow valves (4) are provided upstream and downstream of the one-way valve (7).

6. The working method of the pile gripper of the self-elevating offshore pile stabilizing platform according to claim 5, characterized in that: Any of the oil cylinder hydraulic modules comprises: a three-position four-way solenoid valve (9), a hydraulically controlled one-way valve (10), and a valve block (11) connected in sequence, wherein a stop valve (8) is provided between the output end of the one-way valve (7) and the three-position four-way solenoid valve (9).

7. The working method of the pile gripper of the self-elevating offshore pile stabilizing platform according to claim 1, characterized in that: In step S4, the verticality of the steel pipe pile needs to be monitored during the process of lowering the steel pipe pile. If the steel pipe pile is offset, the steel pipe pile can be adjusted forward, backward, left, and right by moving the oil cylinder assembly on the adjustable base (200), and real-time feedback is provided by a sensor for measuring the verticality of the steel pipe until the steel pipe pile reaches the installation requirements. Then, the steel pipe pile is fixed between the oil cylinders by extending and retracting the working end of the oil cylinder assembly on the fixed base (100), and then the pile is lowered.

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