Offshore wind power jacket foundation lifting-lug-free pile feeder and mounting method

Abstract

The invention relates to the technical field of pile sinking construction, and discloses a lifting lug-free pile feeder for an offshore wind power jacket foundation and an installation method.A self-locking pile gripper capable of achieving self-locking through friction force is combined with a hydraulic pile driver and matched with an upper pile feeder sleeve and a pile foundation positioning seat fixed to a working platform, so that the lifting lug-free pile feeder for the offshore wind power jacket foundation is formed. The self-locking pile clamping device and the pile feeder sleeve are locked at the moment of hammering of the hydraulic pile driver, so that the hydraulic pile driver and the offshore working platform are temporarily locked, upward jumping of the hydraulic pile driver is strongly restrained, all force acts on a pile foundation, and the pile foundation is prevented from being damaged by the self-locking pile clamping device and the pile feeder sleeve. And the piling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pile driving construction, and in particular to an earless pile driver for an offshore wind power conductor frame foundation and an installation method thereof. Background Art

[0002] With the acceleration of the layout of offshore wind power projects and the continuous exploration of the marine environment, the offshore wind power industry is gradually advancing towards high power and deep sea. As offshore wind power moves towards the deep sea, duct-type and floating wind turbine foundations will play a key role. However, my country's floating wind power technology is still in the prototype testing and demonstration project stage. Therefore, duct-type wind turbine foundations will be the mainstream in the near future. Since the tops of the steel pipe piles of the duct foundation are all underwater, only a few meters above the mud surface, in order to sink the steel pipe piles to the designed elevation, long-shift pile driving must be adopted.

[0003] At present, the main pile driving method is: pile driving with a lifting ear pile driver, in which the pile driver is installed in place mainly by a lifting belt, and the pile driver is used as a substitute structure, and the pile driving construction is completed by hammering with a hydraulic hammer. After analyzing this process, it is found that it has major disadvantages: on the one hand, the lifting ear pile driver itself needs to set a lifting ear structure at an appropriate position on the pile body during the design and manufacturing stage, so there are high requirements in structural design and stress control, otherwise there is a risk of the lifting ear falling off during the high-energy pile driving construction process; on the other hand, the lifting ear pile driver uses a lifting belt for pile driving, and the length of the lifting belt is slightly longer than that of the pile driver. The two ends of the lifting belt are respectively connected to the lifting ear and the main hook of the lifting equipment. After the positioning is completed, the connection with the main hook is released, and the lifting belt falls freely to the construction platform. During the pile driving process, a special person is arranged to simultaneously collect the lifting belt, and the main hook is reconnected after the pile driving is completed, and the pile driver is removed. The whole process is complicated and there are safety hazards.

[0004] In addition, the pile driver currently used in pile driving construction is placed on the top of the pile by hoisting without additional fixation. When the ground resistance is large, the pile driver is prone to jump up during pile driving, which may cause danger and affect the efficiency of pile driving. Summary of the invention

[0005] The object of the present invention is to provide an earless pile driver and installation method for an offshore wind turbine conduit foundation, so as to solve the problem that the conventional pile driving process is complicated and has potential safety hazards as mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an offshore wind power conductor frame foundation non-hanging ear type pile driver, comprising a hydraulic pile driver, the lower end of which is fixedly connected to a self-locking pile clamp, a pile foundation positioning seat is fixedly installed on an offshore work platform for pile sinking operations, a steel pipe pile and a non-hanging ear pile driver are sequentially penetrated in the pile foundation positioning seat, an insertion section is arranged at the lower end of the non-hanging ear pile driver, the insertion section is inserted into the upper end of the steel pipe pile, and a pile driver casing is sleeved on the outer side of the non-hanging ear pile driver;

[0007] The self-locking pile clamp comprises a lifting ring, a large toothed ring is movably mounted in the lifting ring through a bearing, a driving pinion is meshed on the inner side of the large toothed ring, and the driving pinion is movably mounted on the lifting ring through an angular support bearing, a cross connecting frame is fixedly connected to the hydraulic pile driver, a lifting guide rail is fixedly connected to the end of the cross connecting frame, a rotating sleeve is fixedly connected to the inside of the lifting ring, the lower end of the lifting guide rail passes through the rotating sleeve at the center of the driving pinion, and a spiral groove is provided on the lifting guide rail, and the rotating sleeve and the spiral groove are connected to each other. The grooves are interlocked with each other, and a clamping gear is meshed on the inner side of the large tooth ring. A clamping arm is fixedly connected to one side of the clamping gear. The end of the clamping arm is rotatably connected to an anti-slip clamping rod. When the large tooth ring rotates, it will drive the clamping gear to rotate, thereby causing the clamping arm to rotate inward, and clamping is performed using the anti-slip clamping rod. After clamping, the friction between the anti-slip clamping rod and the steel pipe pile will continue to pull the lifting ring downward, thereby further increasing the clamping force of the anti-slip clamping rod. In this way, the heavier the steel pipe pile, the greater the clamping force it is subjected to, which can effectively prevent the steel pipe pile from slipping.

[0008] Furthermore, the driving pinions, rotating sleeves and lifting guide rails are each provided with four groups, the four groups of driving pinions are evenly distributed on the inner side of the large gear ring, the four groups of driving pinions are tightly meshed with the large gear ring, and the four lifting guide rails are fixedly connected to the four corner ends of the cross connecting frame, thereby ensuring the stability of the self-locking pile clamp.

[0009] Furthermore, a pile driver lifting ring is provided at the upper end of the hydraulic pile driver, and the hydraulic pile driver is hung on the first crane through the pile driver lifting ring. A pile clamp lifting ear is fixedly connected to each side of the lifting ring, and the pile clamp lifting ear is hung on the second crane. The two hydraulic pile drivers cooperate to facilitate the adjustment of the postures of the hydraulic pile drivers and the self-locking pile clamps.

[0010] Furthermore, the pile foundation locating seat includes a disc locating seat, which is fixedly installed on the offshore construction platform by bolts, and the installation position of the disc locating seat corresponds to the pile sinking coordinate point, which is used to locate the pile sinking position, and the pile foundation locating sleeve is fixedly connected to the disc locating seat to prevent the steel pipe pile from shifting.

[0011] Furthermore, a block slide groove is provided on each side of the pile foundation positioning sleeve, a trapezoidal block is provided in the block slide groove, a slider pull rod is fixedly connected to the outside of the trapezoidal block, a pressure spring is provided on the outer sleeve of the slider pull rod, and the pressure spring is clamped between the inner wall of the block slide groove and the trapezoidal block, and is used to push the trapezoidal block inward to engage with the trapezoidal teeth.

[0012] Furthermore, trapezoidal teeth are processed on the outer side of the pile driver sleeve, and the trapezoidal teeth are engaged with the trapezoidal clamping block, and the inclined surface of the trapezoidal teeth faces downward. When the pile driver sleeve moves downward, the trapezoidal clamping block and the inclined surfaces of the trapezoidal teeth slide, pushing the trapezoidal clamping block outward and compressing the pressure spring. When the pile driver sleeve moves upward, the right-angled sides of the trapezoidal clamping block and the trapezoidal teeth block each other, so that the pile driver sleeve can only move downward, and the upward movement will be blocked by the trapezoidal clamping block.

[0013] Furthermore, the other end of the slider pull rod is movably connected to a disc clamping block via a rotating shaft, and the rotating shaft is located at the edge of the disc clamping block, and an adjustment handle is fixedly connected to the disc clamping block.

[0014] Furthermore, the upper and lower ends of the earless pile driver are respectively fixedly connected with an upper limit block and a lower limit block for limiting the pile driver casing, and the distance between the upper limit block and the lower limit block is greater than the length of the pile driver casing.

[0015] Furthermore, the diameter of the pile foundation positioning sleeve is larger than that of the steel pipe pile, and the upper end of the pile foundation positioning sleeve is a bell mouth, which is convenient for the hoisting and positioning of the steel pipe pile.

[0016] The present invention provides another technical solution: an installation method of an earless pile driver for an offshore wind power conductor frame foundation, comprising the following steps:

[0017] S1. Hanging the hydraulic pile driver: First, use the first crane hook to connect to the pile driver lifting ring on the hydraulic pile driver, and then use the second crane to use two steel cables and hooks to connect to the two pile clamp lifting ears on the self-locking pile clamp respectively.

[0018] S2. Picking up and positioning of steel pipe piles: Use the first crane to move the hydraulic pile driver and the self-locking pile clamp to the position in front of the top of the steel pipe pile to be taken, and use the second crane to lift the lifting ring upwards, so that the anti-slip clamping rods of the self-locking pile clamp spread out to the surroundings, leaving clamping space. At the same time, the second crane continues to lift the hydraulic pile driver and the self-locking pile clamp to a horizontal position, and the self-locking pile clamp is put on the outside of the steel pipe pile. Then the second crane lowers the self-locking pile clamp, and the first crane lifts the hydraulic pile driver and the self-locking pile clamp together, and uses friction to complete the clamping of the steel pipe pile by the self-locking pile clamp, and then uses the turning base to complete the turning of the steel pipe pile. Then the crane rotates the boom to move the steel pipe pile to the pile sinking position, and makes the steel pipe pile dock with the pile foundation positioning seat, and slowly lowers the steel pipe pile to complete its own weight into the soil.

[0019] S3. The first stage of pile driving: After the steel pipe piles are hoisted, the hydraulic pile driver is lowered. The hydraulic pile driver descends, thereby driving the lifting guide rail to descend, so that the self-locking pile clamp is released, and then the hydraulic pile driver is started to carry out the pile driving operation. The self-locking pile clamp is used for support during pile driving to prevent the hydraulic pile driver from shaking. When the lower end of the self-locking pile clamp is about 1m away from the pile foundation positioning seat, the first stage of pile driving is completed.

[0020] S4. Picking up and positioning the earless pile driver: Use the first crane to move the hydraulic pile driver and the self-locking pile clamp to the position in front of the top of the earless pile driver to be taken, use the second crane to lift the lifting ring upwards, so that the anti-slip clamping rods of the self-locking pile clamp spread out to the surroundings, leaving a clamping space, and at the same time, the second crane continues to lift the hydraulic pile driver and the self-locking pile clamp to adjust the posture to be horizontal, and put the self-locking pile clamp on the outside of the pile driver casing, then the second crane lowers the self-locking pile clamp, and the first crane lifts the hydraulic pile driver and the self-locking pile clamp together, and uses friction to complete the clamping of the pile driver casing by the self-locking pile clamp, and then uses the turning base to complete the turning of the earless pile driver, and then the crane rotates the boom to move the earless pile driver to the pile sinking position, and makes the earless pile driver dock with the pile foundation positioning seat, and slowly lowers the earless pile driver, so that the insertion section at the lower end of the earless pile driver is inserted into the upper end of the steel pipe pile, completing the positioning of the earless pile driver.

[0021] S5. Second stage of pile driving: After the lugless pile driver is hoisted, the hydraulic pile driver is started to drive the pile driver to the predetermined depth, thus completing the second stage of pile driving.

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

[0023] 1. The earless pile driver and installation method for the offshore wind power conduit foundation of the present invention adopts an earless pile driver and utilizes a self-locking pile clamp combined with a pile driver to clamp and install the steel pipe pile and the pile driver. No additional crane assistance is required, and no sling connection and unhooking is required. The self-locking pile clamp can clamp the pile foundation and the pile driver by itself when lifting, and can unlock by itself after being hoisted into place, which greatly simplifies the pile sinking process. The original process takes about 36 hours to sink a pile at one position, and the new process is expected to be completed within 30 hours, greatly improving work efficiency.

[0024] 2. The earless pile driver and installation method for the offshore wind turbine conduit foundation of the present invention is combined with a hydraulic pile driver through a self-locking pile clamp that can utilize friction to self-lock, and cooperates with the pile driver casing and the pile foundation positioning seat fixed on the working platform, so that the pile driver casing can only move downward but not upward. At the moment when the hydraulic pile driver hammers, the self-locking pile clamp and the pile driver casing are locked, and then the hydraulic pile driver and the offshore working platform are temporarily locked, which strongly suppresses the hydraulic pile driver from jumping up, so that all the force acts on the pile foundation, thereby improving the efficiency of piling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the working position structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the hydraulic pile driver of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the self-locking pile clamp of the present invention;

[0028] Figure 4 It is a schematic diagram of the casing structure of the pile driver of the present invention;

[0029] Figure 5 This is a schematic diagram of the pile foundation positioning seat structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the matching structure of the pile foundation positioning seat and the pile driver casing of the present invention.

[0031] Numbers in the figure: 1, hydraulic pile driver; 101, pile driver lifting ring; 2, self-locking pile clamp; 201, lifting ring; 202, large gear ring; 203, driving pinion; 204, cross connecting frame; 205, lifting guide rail; 206, rotating sleeve; 207, spiral groove; 208, clamping gear; 209, clamping arm; 210, anti-slip clamping rod; 211, pile clamp lifting ear; 3, pile foundation fixing Position seat; 301, disc positioning seat; 302, pile foundation positioning sleeve; 303, block slide; 304, trapezoidal block; 305, slider pull rod; 306, pressure spring; 307, disc block; 308, adjustment handle; 4, steel pipe pile; 5, pile driver without lifting ear; 501, insertion section; 502, upper limit block; 503, lower limit block; 6, pile driver sleeve; 601, trapezoidal teeth. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0033] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0034] See also Figure 1 - Figure 6 The offshore wind power pipe frame foundation earless pile driver comprises a hydraulic pile driver 1, a pile driver lifting ring 101 is arranged on the upper end of the hydraulic pile driver 1, the hydraulic pile driver 1 is hung on a crane through the pile driver lifting ring 101, a self-locking pile clamp 2 is fixedly connected to the lower end of the hydraulic pile driver 1, and the self-locking pile clamp 2 uses gravity and friction to self-lock and complete the lifting of the steel pipe pile 4 and the earless pile driver 5.

[0035] A pile foundation positioning seat 3 is fixedly installed on the offshore work platform used for pile driving operation, and the steel pipe pile 4 is subjected to pile driving operation under the limit of the pile foundation positioning seat 3. When the upper end of the steel pipe pile 4 sinks to the pile foundation positioning seat 3 and the pile driving operation cannot be continued, the insertion section 501 at the lower end of the pile driver 5 without lifting ears is inserted into the steel pipe pile 4 for extension so as to continue the pile driving operation.

[0036] like Figure 2 and Figure 3As shown, the self-locking pile clamp 2 includes a lifting ring 201, a large toothed ring 202 is movably installed in the lifting ring 201 through a bearing, a driving pinion 203 is meshed inside the large toothed ring 202, four groups of driving pinions 203 are provided, and the driving pinions 203 are movably installed on the lifting ring 201 through an angle support bearing, a cross connecting frame 204 is fixedly connected to the hydraulic pile driver 1, a lifting guide rail 205 is fixedly connected to the end of the cross connecting frame 204, a rotating sleeve 206 is fixedly connected to the lifting ring 201, the lower end of the lifting guide rail 205 passes through the rotating sleeve 206 at the center of the driving pinion 203, and a spiral groove 207 is opened on the lifting guide rail 205, the rotating sleeve 206 and the spiral groove 207 are interlocked, when the rotating sleeve 206 slides up and down along the lifting guide rail 205, the rotating sleeve 206 is rotated. The sliding sleeve 206 will also rotate along the spiral groove 207, thereby driving the driving pinion 203 to rotate, and then driving the large gear ring 202 to rotate. In addition, four sets of clamping gears 208 are meshed on the inner side of the large gear ring 202. A clamping arm 209 is fixedly connected to one side of the clamping gear 208, and an anti-skid clamping rod 210 is rotatably connected to the end of the clamping arm 209. When the large gear ring 202 rotates, it will drive the clamping gear 208 to rotate, thereby causing the clamping arm 209 to rotate inward, and the anti-skid clamping rod 210 is used for clamping. After clamping, the friction between the anti-skid clamping rod 210 and the steel pipe pile 4 will continue to pull the lifting ring 201 downward, thereby further increasing the clamping force of the anti-skid clamping rod 210. In this way, the heavier the steel pipe pile 4, the greater the clamping force it is subjected to, which can effectively prevent the steel pipe pile 4 from slipping.

[0037] In addition, a pile clamp lifting ear 211 is fixedly connected to each side of the lifting ring 201, which is used to connect the steel cable to be suspended on the crane, so that the lifting ring 201 can be lifted by the crane, so that the driving pinion 203, the large gear ring 202 and the clamping gear 208 rotate in the opposite direction, thereby making the anti-slip clamping rod 210 retreat to the surroundings and release the clamping of the steel pipe pile 4. In addition, it can also cooperate with the crane for lifting the hydraulic pile driver 1 to change the posture of the hydraulic pile driver 1, so that the hydraulic pile driver 1 and the self-locking pile clamp 2 are turned sideways. The steel pipe pile 4 and the earless pile driver 5 placed upside down on the ship are lifted up. During the lifting, the steel pipe pile 4 will pull the lifting ring 201 through friction, so that the anti-skid clamping rod 210 will clamp the steel pipe pile 4, and then the steel pipe pile 4 will be lifted up for installation. After being in place, the bottom of the steel pipe pile 4 contacts the seabed and is supported, so that no downward pulling force is applied to the lifting ring 201. At this time, the crane will lift the lifting ring 201, and the anti-skid clamping rod 210 will spread out to the surroundings, stop clamping the steel pipe pile 4, and facilitate the pile sinking operation.

[0038] like Figure 5 and Figure 6As shown, the pile foundation positioning seat 3 includes a disc positioning seat 301, which is fixedly installed on the offshore construction platform by bolts, and the installation position of the disc positioning seat 301 corresponds to the pile sinking coordinate point, and a pile foundation positioning sleeve 302 is fixedly connected to the disc positioning seat 301. The diameter of the pile foundation positioning sleeve 302 is larger than the steel pipe pile 4, and the upper end of the pile foundation positioning sleeve 302 is a trumpet mouth, which is convenient for the hoisting and positioning of the steel pipe pile 4.

[0039] A card block slide 303 is also provided on both sides of the pile foundation positioning sleeve 302, and a trapezoidal card block 304 is provided in the card block slide 303. Correspondingly, a pile driver sleeve 6 is sleeved on the outside of the pile driver sleeve 6 without a lifting ear, and a trapezoidal tooth 601 is processed on the outside of the pile driver sleeve 6. The trapezoidal tooth 601 and the trapezoidal card block 304 are mutually engaged. A slider rod 305 is also fixedly connected to the outside of the trapezoidal card block 304. The slider rod 305 is provided with a pressure spring 306 on its outer sleeve, and the pressure spring 306 is stuck in the card block slide 303. The inner wall of the pile driver and the trapezoidal block 304 are used to push the trapezoidal block 304 inward to engage with the trapezoidal teeth 601. When the pile driver sleeve 6 moves downward, the inclined surfaces of the trapezoidal block 304 and the trapezoidal teeth 601 slide to push the trapezoidal block 304 outward and compress the pressure spring 306. When the pile driver sleeve 6 moves upward, the right-angled sides of the trapezoidal block 304 and the trapezoidal teeth 601 block each other, so that the pile driver sleeve 6 can only move downward, and the upward movement will be blocked by the trapezoidal block 304.

[0040] In addition, the other end of the slider rod 305 is movably connected to a disc block 307 through a rotating shaft, and the rotating shaft is located at the edge of the disc block 307. The disc block 307 is also fixedly connected to an adjusting handle 308. When the disc block 307 is rotated by the adjusting handle 308, the rotating shaft will move eccentrically, so that the slider rod 305 is pulled outward, and then the trapezoidal block 304 is retracted into the block slide groove 303, no longer blocking the pile driver sleeve 6 from moving upward, so that the pile driver sleeve 6 can be pulled out.

[0041] like Figure 4As shown, the upper and lower ends of the earless pile driver 5 are respectively fixedly connected with an upper limit block 502 and a lower limit block 503, which are used to limit the pile driver casing 6, and the distance between the upper limit block 502 and the lower limit block 503 is greater than the length of the pile driver casing 6, which is convenient for the pile driver casing 6 to slide up and down. During the pile sinking operation, the pile driver casing 6 is located at the bottom, and the upper end of the earless pile driver 5 protrudes from the pile driver casing 6 for a distance. When the hydraulic pile driver 1 is working, the hammer of the hydraulic pile driver 1 falls and hits the earless pile driver 5, and the hydraulic pile driver 1 is reversed. The driving force pushes upward, thereby driving the lifting guide rail 205 to move upward, so that the self-locking pile clamp 2 further clamps the pile driver sleeve 6, and the trapezoidal teeth 601 on the outside of the pile driver sleeve 6 can also prevent slipping, so that the hydraulic pile driver 1 is locked with the pile driver sleeve 6 at the moment of hammering, and at the same time, the pile driver sleeve 6 is locked with the offshore working platform through the engagement connection of the pile foundation positioning seat 3, so that the hydraulic pile driver 1 is locked on the offshore working platform and cannot jump up, so that all the force acts on the earless pile driver 5, thereby improving the pile driving efficiency.

[0042] The installation method of the earless pile driver for offshore wind power pipe foundation comprises the following steps:

[0043] S1. Hanging the hydraulic pile driver 1: First, use the first crane hook to connect to the pile driver lifting ring 101 on the hydraulic pile driver 1, and then use the second crane to use two steel cables and hooks to connect to the two pile clamp lifting ears 211 on the self-locking pile clamp 2 respectively.

[0044] S2. Picking up and positioning the steel pipe pile 4: Use the first crane to move the hydraulic pile driver 1 and the self-locking pile clamp 2 to the position in front of the top of the steel pipe pile 4 to be taken, and use the second crane to lift the lifting ring 2 upward, so that the anti-slip clamping rod 210 of the self-locking pile clamp 2 spreads out to the surroundings, leaving a clamping space. At the same time, the second crane continues to lift the hydraulic pile driver 1 and the self-locking pile clamp 2 to adjust the posture to be horizontal, and the self-locking pile clamp 2 is sleeved on the outside of the steel pipe pile 4. Then the second crane lowers the self-locking pile clamp 2, and the first crane lifts the hydraulic pile driver 1 and the self-locking pile clamp 2 together, and uses friction to complete the clamping of the steel pipe pile 4 by the self-locking pile clamp 2, and then uses the turning base to complete the turning of the steel pipe pile 4, and then the crane rotates the boom to move the steel pipe pile 4 to the pile sinking position, and makes the steel pipe pile 4 and the pile foundation positioning seat 3 complete docking, and slowly lowers the steel pipe pile 4 to complete its own weight into the soil.

[0045] S3. The first stage of pile driving: after the steel pipe pile 4 is hoisted, the hydraulic pile driver 1 is lowered and descended, thereby driving the lifting guide rail 205 to descend, so that the self-locking pile clamp 2 is released, and then the hydraulic pile driver 1 is started to perform the pile driving operation. The self-locking pile clamp 2 provides support during pile driving to prevent the hydraulic pile driver 1 from shaking. When the lower end of the self-locking pile clamp 2 is about 1m away from the pile foundation positioning seat, the first stage of pile driving is completed.

[0046] S4. Picking up and positioning the lugless pile driver 5: Use the first crane to move the hydraulic pile driver 1 and the self-locking pile clamp 2 to a position in front of the top of the lugless pile driver 5 to be picked up, and use the second crane to lift the lifting ring 2 upward, so that the anti-slip clamping rod 210 of the self-locking pile clamp 2 spreads out to the surroundings, leaving a clamping space. At the same time, the second crane continues to lift the hydraulic pile driver 1 and the self-locking pile clamp 2 to a horizontal position, and the self-locking pile clamp 2 is placed on the outside of the pile driver casing 6. Then the second crane lowers the self-locking pile clamp 2. The first crane lifts the hydraulic pile driver 1 and the self-locking pile clamp 2 together, and uses the friction force to clamp the pile driver sleeve 6 with the self-locking pile clamp 2. Then, the turning base is used to turn over the pile driver 5 without lifting ears. Then, the crane rotates the boom to move the pile driver 5 without lifting ears to the pile sinking position, and makes the pile driver 5 without lifting ears dock with the pile foundation positioning seat 3. The pile driver 5 without lifting ears is slowly lowered so that the insertion section 501 at the lower end of the pile driver 5 without lifting ears is inserted into the upper end of the steel pipe pile 4, and the positioning of the pile driver 5 without lifting ears is completed.

[0047] S5. Second stage of pile driving: After the lugless pile driver 5 is hoisted, the hydraulic pile driver 1 is started to drive the pile driver 5 to drive the steel pipe pile 4 to a predetermined depth, thus completing the second stage of pile driving.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An offshore wind power conductor frame foundation non-hanging ear type pile driver, comprising a hydraulic pile driver (1), characterized in that: The lower end of the hydraulic pile driver (1) is fixedly connected to a self-locking pile clamp (2), and a pile foundation positioning seat (3) is fixedly installed on an offshore work platform for pile sinking operations. A steel pipe pile (4) and a pile driver (5) without a lifting lug are sequentially passed through the pile foundation positioning seat (3). The lower end of the pile driver (5) without a lifting lug is provided with an insertion section (501), and the insertion section (501) is inserted into the upper end of the steel pipe pile (4). The pile driver sleeve (6) is sleeved on the outer side of the pile driver (5) without a lifting lug; The self-locking pile clamp (2) comprises a lifting ring (201), a large toothed ring (202) is movably mounted in the lifting ring (201) via a bearing, a driving pinion (203) is meshed inside the large toothed ring (202), and the driving pinion (203) is movably mounted on the lifting ring (201) via an angle support bearing, a cross connecting frame (204) is fixedly connected to the hydraulic pile driver (1), a lifting guide rail (205) is fixedly connected to the end of the cross connecting frame (204), and the lifting ring (201) is fixed inside. A rotating sleeve (206) is connected, the lower end of the lifting guide rail (205) passes through the rotating sleeve (206) at the center of the driving pinion (203), and a spiral groove (207) is opened on the lifting guide rail (205), the rotating sleeve (206) and the spiral groove (207) are interlocked with each other, and a clamping gear (208) is meshed on the inner side of the large gear ring (202), and a clamping arm (209) is fixedly connected to one side of the clamping gear (208), and the end of the clamping arm (209) is rotatably connected to an anti-slip clamping rod (210).

2. The offshore wind power conduit foundation non-hanging ear type pile driver according to claim 1, characterized in that: The driving pinion gear (203), the rotating sleeve (206) and the lifting guide rail (205) are all provided with four groups. The four groups of driving pinion gears (203) are evenly distributed inside the large gear ring (202). The four groups of driving pinion gears (203) are respectively tightly meshed with the large gear ring (202). The four lifting guide rails (205) are respectively fixedly connected to the four corner ends of the cross connecting frame (204).

3. The earless pile driver for offshore wind power conduit foundation according to claim 1 is characterized by: A pile driver lifting ring (101) is arranged at the upper end of the hydraulic pile driver (1), and the hydraulic pile driver (1) is hung on a first crane via the pile driver lifting ring (101). A pile clamp lifting lug (211) is fixedly connected to each of the two sides of the lifting ring (201), and the pile clamp lifting lug (211) is hung on a second crane.

4. The earless pile driver for offshore wind power conduit foundation according to claim 1 is characterized in that: The pile foundation positioning seat (3) comprises a disc positioning seat (301), the disc positioning seat (301) is fixedly installed on the offshore construction platform by means of bolts, and the installation position of the disc positioning seat (301) corresponds to the pile sinking coordinate point, and the pile foundation positioning sleeve (302) is fixedly connected to the disc positioning seat (301).

5. The earless pile driver for offshore wind power conduit foundation according to claim 4 is characterized by: A block slide groove (303) is provided on each side of the pile foundation positioning sleeve (302), a trapezoidal block (304) is provided in the block slide groove (303), a slider rod (305) is fixedly connected to the outside of the trapezoidal block (304), a pressure spring (306) is provided on the outer sleeve of the slider rod (305), and the pressure spring (306) is stuck between the inner wall of the block slide groove (303) and the trapezoidal block (304).

6. The earless pile driver for offshore wind power conduit foundation according to claim 5, characterized in that: The outer side of the pile driver sleeve (6) is processed with a trapezoidal tooth (601), the trapezoidal tooth (601) and the trapezoidal clamping block (304) are mutually engaged, and the inclined surface of the trapezoidal tooth (601) faces downward.

7. The earless pile driver for offshore wind power conduit foundation according to claim 5, characterized in that: One end of the slider pull rod (305) is movably connected to a disc clamping block (307) via a rotating shaft, and the rotating shaft is located at the edge of the disc clamping block (307). An adjusting handle (308) is also fixedly connected to the disc clamping block (307).

8. The earless pile driver for offshore wind power conduit foundation according to claim 4, characterized in that: An upper limit block (502) is fixedly connected to the upper end of the lugless pile driver (5), and a lower limit block (503) is fixedly connected to the lower end of the lugless pile driver (5), and the distance between the upper limit block (502) and the lower limit block (503) is greater than the length of the pile driver sleeve (6).

9. The earless pile driver for offshore wind power conduit foundation according to claim 1, characterized in that: The pile foundation positioning sleeve (302) has a diameter greater than that of the steel pipe pile (4), and the upper end of the pile foundation positioning sleeve (302) is a bell mouth.

10. The installation method of the non-hanging-ear type pile driver for offshore wind power conduit foundation according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Hanging the hydraulic pile driver (1): First, the first crane hook is connected to the pile driver lifting ring (101) on the hydraulic pile driver (1), and then the second crane uses two steel cables and hooks to connect the two pile clamp lifting ears (211) on the self-locking pile clamp (2) respectively; S2. Picking up and positioning the steel pipe pile (4): Using the first crane, the hydraulic pile driver (1) and the self-locking pile clamp (2) are moved to a position in front of the top of the steel pipe pile (4) to be picked up, and the lifting ring (2) is lifted upward by the second crane, so that the anti-slip clamping rod (210) of the self-locking pile clamp (2) spreads out to the surroundings, leaving a clamping space. At the same time, the second crane continues to lift up to adjust the posture of the hydraulic pile driver (1) and the self-locking pile clamp (2) to a horizontal position, and the self-locking pile clamp (2) is placed on the steel pipe. The first crane lifts the hydraulic pile driver (1) and the self-locking pile clamp (2) together, and uses friction to clamp the steel pipe pile (4) with the self-locking pile clamp (2). The steel pipe pile (4) is then turned over by using the turning base. The crane then rotates the boom to move the steel pipe pile (4) to the pile sinking position, and connects the steel pipe pile (4) with the pile foundation positioning seat (3). The steel pipe pile (4) is then slowly lowered to complete its self-weight burial in the soil. S3. The first stage of pile sinking: After the steel pipe pile (4) is hoisted, the hydraulic pile driver (1) is lowered, and the hydraulic pile driver (1) descends, thereby driving the lifting guide rail (205) to descend, so that the self-locking pile clamp (2) is released, and then the hydraulic pile driver (1) is started to carry out the pile driving operation. The self-locking pile clamp (2) provides support during the pile driving to prevent the hydraulic pile driver (1) from shaking. When the lower end of the self-locking pile clamp (2) is 1m away from the pile foundation positioning seat, the first stage of pile sinking is completed; S4. Picking up and positioning the lugless pile driver (5): Use the first crane to move the hydraulic pile driver (1) and the self-locking pile clamp (2) to a position in front of the top of the lugless pile driver (5) to be picked up, and use the second crane to lift the lifting ring (2) upward, so that the anti-slip clamping rod (210) of the self-locking pile clamp (2) spreads out to the surroundings to leave a clamping space. At the same time, the second crane continues to lift the hydraulic pile driver (1) and the self-locking pile clamp (2) to a horizontal position, and the self-locking pile clamp (2) is placed on the outside of the pile driver casing (6). Then, the second crane lowers the self-locking pile clamp (2). The first crane lifts the hydraulic pile driver (1) and the self-locking pile clamp (2) together, and uses the friction force to clamp the pile driver sleeve (6) with the self-locking pile clamp (2). Then, the turning base is used to turn over the pile driver (5) without lifting ears. Then, the crane rotates the boom to move the pile driver (5) without lifting ears to the pile sinking position, and makes the pile driver (5) without lifting ears dock with the pile foundation positioning seat (3). The pile driver (5) without lifting ears is slowly lowered, so that the insertion section (501) at the lower end of the pile driver (5) without lifting ears is inserted into the upper end of the steel pipe pile (4), and the positioning of the pile driver (5) without lifting ears is completed. S5. Second stage of pile driving: After the lugless pile driver (5) is hoisted, the hydraulic pile driver (1) is started to drive the lugless pile driver (5) to drive the steel pipe pile (4) to a predetermined depth, thus completing the second stage of pile driving.

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