273results about "Anchor handling/lashing" patented technology

The invention discloses a novel floating photovoltaic water level sensing automatic adjusting device, and relates to the technical field of floating photovoltaic structures.The novel floating photovoltaic water level sensing automatic adjusting device comprises a floating surface table, a photovoltaic frame is arranged above the floating surface table, a photovoltaic panel is installed above the photovoltaic frame, and an outer frame ring is fixedly connected to the outer side face of the floating surface table; a floating surface adjusting mechanism is arranged in the floating surface table, a water level sensing mechanism is arranged on the bottom surface of the floating surface table, a collision protection structure is arranged above the outer frame ring, a vertical supporting plate is fixedly connected to the bottom end of the outer frame ring, a bottom ring frame is fixedly connected to the bottom end of the vertical supporting plate, and a floating barrel is arranged on the outer side of the bottom ring frame; according to the floating platform, buoyancy and support are provided for the bottom of the inclined floating platform through overturning of the arc-shaped floating box, so that the inclination angle of the floating platform during inclination is reduced, the stability of the floating platform structure on the water surface is improved, and the situation that the power generation efficiency of a photovoltaic panel on a photovoltaic frame is affected due to large-angle shaking of the floating platform is prevented.

The invention discloses an automatic retracting device for a marine anchor and mooring machine, which relates to the technical field of marine machinery and comprises an outer shell, a mounting cavity, an anchor chain winding drum, a transmission shaft, a motor I, a buffer mechanism, a retracting and releasing mechanism, an anchor chain and a retracting and releasing opening, the device is reasonable and simple in structure, low in production cost and convenient to mount, during anchoring, the anchor chain is guided to be released stably and orderly through cooperative operation of the motor, a specific transmission structure and the retracting and releasing mechanism, winding and jamming are avoided, the releasing speed of the anchor chain can be reduced, and accurate berthing of a ship is assisted; in the anchoring and weighing process, the buffering mechanism is matched with the adjustable buffering mechanism, torque change of the transmission shaft can be effectively buffered, different working conditions can be adapted, key parts of equipment are protected, the service life is prolonged, and the maintenance cost is reduced; during anchor weighing, the take-up and pay-off mechanism works reversely, the anchor chain outside the ship can be led in and wound on the anchor chain winding drum in order, meanwhile, the buffering mechanism continuously plays a role, and transmission shaft torque sudden change caused by stress or rotating speed change is prevented.

The utility model discloses a ship anchoring device and belongs to the technical field of ships, the ship anchoring device comprises an anchor assembly and an anti-collision piece, the anchor assembly comprises an anchor gear, an anchor chain and an anchor body, the anchor gear is arranged on a ship body, the ship body is provided with a hawse pipe and an anchor recess communicated with the hawse pipe, one end of the anchor chain is connected with the anchor gear, and the other end of the anchor chain is connected with the anchor body; the anti-collision piece is arranged at the anchor recess, the anti-collision piece can move between an unfolding position and a storage position, at least part of the anti-collision piece extends out of the anchor recess and abuts against the anchor chain at the unfolding position, and the anti-collision piece does not exceed the anchor recess at the storage position. At the unfolding position, the anti-collision piece supports the anchor chain to enable the horizontal distance between the anchor chain and the ship body to be large, so that the anchor body is prevented from colliding with the ship body; and at the storage position, the anti-collision piece does not exceed the anchor recess, so that the occupied space is reduced.

The invention relates to the technical field of ship energy recovery, in particular to a ship anchoring gravitational potential energy recovery method and system. The system comprises an anchor chain roller, a two-way anchor machine motor, a speed-increasing transmission mechanism, a power generation mechanism, a composite energy storage assembly and an intelligent controller, the anchor chain roller is connected with the two-way anchor machine motor and the speed-increasing transmission mechanism, and the speed-increasing transmission mechanism, the power generation mechanism and the energy storage assembly are sequentially connected; the intelligent controller is connected with the speed-increasing transmission mechanism and the power generation mechanism; during anchoring, the two-way anchor machine motor enters a power generation mode, gravitational potential energy formed by anchoring drives the anchor chain roller to rotate so as to convert the gravitational potential energy into mechanical energy, the mechanical energy is transmitted to the power generation mechanism through rotation of the speed increasing transmission mechanism, and the power generation mechanism generates power based on the mechanical energy and transmits the generated electric energy to the composite energy storage assembly for storage. The recovery of the gravitational potential energy generated during anchoring is realized, and the waste of the gravitational potential energy generated during anchoring is avoided.

The invention discloses a ship cablelifter with a tooth clamping prevention mechanism, and belongs to the technical field of ship cablelifts.The ship cablelifter comprises a mounting bottom plate, a pair of fixing bases are fixedly connected to the mounting bottom plate, a winding drum is rotationally connected between the two fixing bases, a rotating base is fixedly connected to the mounting bottom plate, and a tooth clamping prevention mechanism is arranged on the rotating base. And a matching roller is rotationally connected into the rotating seat. The guide structure is arranged to limit an anchor chain, when the anchor chain is wound, the distribution of the anchor chain on the winding drum is more uniform, the service life of the winding drum is prolonged, the deformation of the anchor chain caused by non-uniform distribution of the anchor chain is also avoided, the anchor chain can be continuously washed by arranging the high-pressure washing mechanism, and the service life of the winding drum is prolonged. And by arranging the brake mechanism, the winding drum can be limited when the device is used for winding and unwinding the anchor chain, so that uncontrollable accidents are avoided, and the use safety of the device is improved.

The utility model discloses an anchor chain take-up and pay-off device for a ship, which relates to the technical field of ship equipment and comprises a base, a winding machine is mounted at the top of the base, a rotating shaft is rotatably connected to the top of the base, a guide wheel is fixedly connected to the outer side of the rotating shaft, grooves are equidistantly formed in the outer side of the guide wheel, and an annular groove is formed in the outer side of the guide wheel. The guide wheel is provided with the grooves and the annular grooves, the guide wheel can perfectly fit with the shape of an anchor chain, the anchor chain is more stable in the winding and unwinding process, and the guide wheel is more stable in winding and unwinding process, more stable in winding and unwinding process, more stable in winding and unwinding process, more stable in winding and unwinding process, more stable in winding and unwinding, more stable in winding and unwinding, and more stable in winding and unwinding. The clamping or disorder phenomenon caused by the irregular shape of the chain ring is avoided, the efficiency of winding and unwinding the anchor chain is improved, and potential safety hazards caused by misoperation or equipment failures are reduced.

The invention relates to the technical field of cablelifter, in particular to a double-winding-drum rapid cablelifter which comprises a double-shaft driving machine, a winding mechanism, a wire arranging mechanism and a rope fixing mechanism, the winding mechanism comprises a winding drum, a rotating shaft is fixedly arranged in the winding drum in a sleeved mode and fixedly connected with the output end of the double-shaft driving machine, and the wire arranging mechanism comprises a transverse moving frame. A U-shaped frame is fixedly connected to the upper surface of the transverse moving frame, a guide roller is rotationally sleeved with the U-shaped frame, the rope fixing mechanism comprises a rope binding cover, one side of the bottom of the rope binding cover is fixedly connected with a connecting plate, a limiting hole is formed in the bottom of the connecting plate, and a telescopic insertion rod is arranged on one side of the limiting hole; the transverse moving frame capable of transversely moving in a reciprocating mode drives the U-shaped frame to move in a reciprocating mode, so that a rope is automatically and evenly wound, manual guarding is not needed, the rope cannot be wound together, time and labor are saved, follow-up use is facilitated, after the rope is wound, the wound rope can be conveniently fixed through the binding rope, the situation that the rope is likely to be scattered accidentally is prevented, and the rope winding efficiency is improved. And subsequent normal use is further facilitated.

The supporting structure comprises a floating pontoon body, the top end of the floating pontoon body is connected with a fence, the top end of the floating pontoon body is connected with a power control box, the fence is provided with a first sealing door, the top end of the floating pontoon body is connected with a mechanical arm driven by electric hydraulic pressure, and the mechanical arm is provided with a second sealing door. A fixing mechanism is installed on the pontoon body, a supporting mechanism is installed on the mechanical arm, and an adjusting mechanism is arranged on the supporting mechanism. After the pontoon body is driven to the operation sea surface, a gear motor is started to rotate a winding roller, so that an iron chain is placed downwards, the iron chain lowers a hook anchor to the sea bottom, the hook anchor is inserted into the sea bottom, the pontoon body is stabilized on the water surface, stability of the pontoon body is ensured, a second sealing door is opened, personnel climb on a supporting plate, and the second sealing door is closed; the mechanical arm is started and moves the supporting mechanism to an operation position on the sea surface, and therefore operation of workers is facilitated.

The anchoring system comprises a buoy device, an anchor chain assembly and an anchor block, the uppermost section of the anchor chain assembly is a winding rope, and a winding mechanism, a winding rope conveying mechanism and an attachment removing mechanism are arranged on the buoy device; the winding mechanism comprises a winding drum and a winding motor; the attachment removing mechanism is arranged below the buoy device, and the winding rope penetrates through the attachment removing mechanism; the winding rope conveying mechanism is arranged in the buoy device and located between the winding mechanism and the attachment removing mechanism. The uppermost section of the anchor chain assembly is the winding rope, compared with a metal anchor chain, the weight of the winding rope is light, the working load of the winding mechanism can be reduced, in addition, by arranging the attachment removing mechanism, attachments on the winding rope can be scraped away firstly when rope winding operation is conducted, and the attachments are prevented from affecting the rope winding operation; by arranging the winding rope conveying mechanism, the winding rope can be reliably conveyed downwards during rope unwinding, and the problem that the winding rope is prone to winding and knotting due to the fact that the winding rope does not move downwards in time is solved.

The invention discloses a separated type double-head torpedo anchor device and an operation method thereof. The device comprises an anchor rod, a first anchor head movably arranged in an inner cavity of the anchor rod, a second anchor head located below the first anchor head and an anchor chain connected between the first anchor head and the second anchor head. Wherein the second anchor head is detachably installed at the bottom of the anchor rod through a connecting limiting assembly and can be separated from the anchor rod under the reaction force of a seabed soil layer and the external upward pulling force effect after the torpedo anchor is inserted into the seabed soil layer. After the torpedo anchor penetrates into a soil body, the mooring anchor chain is vertically pulled to enable the anchor rod to be separated from the second anchor head, a gap generated in the middle can be covered with silt, and the vertical pulling resistance of the torpedo anchor is greatly improved; through the cooperation effect of the water flowing channel and the tail rotor assembly, water flow drives the tail rotor assembly to rotate in the falling process of the torpedo anchor, the torpedo anchor can be controlled to keep the vertical falling posture, the angle of the torpedo anchor penetrating into the seabed soil layer is close to be vertical, and the horizontal tensile moment of the torpedo anchor can be further increased.

The invention provides a device and a working method of a side face unfolding weight increasing type torpedo anchor. The device comprises an anchor body, a working anchor chain, an unfolding panel and the like, the middle of the anchor body adopts a side unfolding design, and when the working anchor chain is pulled to a middle area, the unfolding panel and a soil body are pushed by a tension transmission structure to be squeezed into a hollow area and a soil holding frame, and the panel is assisted to be continuously unfolded. The unfolding panel is connected with the anchor body through a hinge, has a corresponding area and a soil holding frame, can be unfolded to a control angle, and can be rotated to the optimal orientation before being thrown. The working anchor chain and the lifting chain are matched to enable the torpedo anchor to be in a two-point tension service state. The working method comprises the steps of putting, pulling, unfolding, forming a service state and the like, through the design, the anti-pulling stress area can be increased, the self weight can be increased, the working state that only the tail end of a traditional torpedo anchor is pulled is changed, the anti-pulling bearing capacity and stability of the torpedo anchor are effectively improved, and the torpedo anchor has important application value in the anchoring field of ocean engineering and the like.

The invention discloses an anchoring speed limiting device for a ship anchor gear, and relates to the technical field of anchoring equipment, the anchoring speed limiting device comprises a bottom layer mounting plate, a first supporting plate and a second supporting plate are fixedly mounted on the bottom layer mounting plate, an energy storage assembly I is mounted on the first supporting plate, and an energy storage assembly II is mounted on the second supporting plate; a matching chuck is arranged between the first supporting plate and the second supporting plate, a groove is formed in the matching chuck, the anchor chain is matched with the groove to drive the matching chuck to rotate, and the matching chuck drives the first energy storage assembly and the second energy storage assembly to store energy. According to the technical scheme, during anchoring, the chain drives the matched chuck to rotate, the matched chuck rotates to drive the two energy storage assemblies to store energy, the rotating speed of the matched chuck is controlled through the energy storage assemblies, and the situation that an anchor chain sinks too fast and is out of control, and damage is caused is prevented.

The invention relates to the technical field of anchor gear buffering, and discloses a buffering structure, an anchor gear based on the buffering structure and a using method.The buffering structure comprises an anchor gear mounting frame, an intermittent braking mechanism is fixedly mounted on the anchor gear mounting frame, and the intermittent braking mechanism comprises a fixing support fixedly connected to the anchor gear mounting frame; a rotating cam is rotationally connected to the fixing support, and a limiting assembly is slidably connected to one side of the rotating cam. The transmission assembly drives the rotating cam at one end to rotate, the rotating cam rotates to intermittently push the limiting assembly to slide along the inner wall of the anchor gear mounting frame, meanwhile, the upper clamping plate and the lower clamping plate are driven to rotate along the fixing frame to clamp a brake disc on one side of the anchor chain roller, and the speed of the anchor chain roller can be controlled in a staged mode; potential safety hazards caused by too fast or too slow anchoring are prevented, violent impact on an anchor gear, a clutch and other components due to too fast release of the anchor chain is avoided, the damage risk of equipment is reduced, and the service life of the equipment is prolonged.

A bolster hook assembly for securing fairleads of floating vessels, along with subsea disconnect elements. A bolster hook has a shank portion and a hook base portion, and is shaped and has a weight distribution which brings the bolster hook into an engaging alignment with an anchor bolster on a floating vessel, as the bolster hook is pulled over the anchor bolster. Methods of use of the bolster hook assembly are disclosed in connection with, mechanical, and acoustic / mechanical subsea release apparatus.

The invention belongs to the field of cablelifter, and particularly relates to a marine cablelifter which comprises a driving gear and a transmission gear which are meshed with each other, the diameter of the driving gear is smaller than that of the transmission gear, a gear motor used for driving the driving gear to rotate is arranged at one end of the driving gear, and a transmission shaft is fixedly connected to the middle of the transmission gear. A winding disc is fixedly connected to the outer side of one end of the transmission shaft, the middle of the winding disc is used for fixing a ship anchor chain, a plurality of sets of through holes are formed in the two side walls of the winding disc, and a plurality of supporting strips capable of horizontally moving are arranged on one side of the winding disc; through the arrangement, the ship anchor chain is always kept in a neat and non-tangled winding state, the phenomenon that the ship anchor chain wound later wraps the outer side of the ship anchor chain wound front is avoided, the ship anchor chain is uniform in stress and free of excessive extrusion, the shape and the coating of the ship anchor chain are guaranteed, potential safety hazards are effectively reduced, and meanwhile the service life is prolonged.

The present invention relates to the technical field of windlasses, and discloses an anchoring structure, a windlass based on this structure and a usage method. Through the setting of the connection component, when it is necessary for the windlass to simultaneously retrieve the ship anchor and the cable, the crew uses the lever to push the engagement shaft to dock with the engagement disc of the winch, becoming an integral whole. So that when the windlass drives the winch to rotate and retrieve the anchor chain, it can also synchronously drive the auxiliary drum to rotate, enabling the auxiliary drum to retrieve the cable. When it is necessary for the windlass to separately retrieve the ship anchor or the cable, the crew uses the lever to push the connecting shaft to separate from the engagement disc of the winch, making the winch and the auxiliary drum independent of each other, and capable of separately retrieving the ship anchor or the cable. Thus, the windlass can be applied to various situations, improving the applicability of the device.

This invention discloses an intelligent dynamic anchor chain control method and system, belonging to the field of anchor chain control technology. The method includes: constructing a matrix-like grid and simulating its static, undisturbed state to obtain a standard three-dimensional control volume diagram; mapping this diagram to a standard two-dimensional control surface diagram and dividing the control surface region; generating a dynamic two-dimensional control surface sub-diagram based on the movement position of the self-floating support under wave impact, overlapping it with the standard diagram to mark the areas where dynamic surface points are located, and generating a control sample set; evaluating the overall dynamic tendency to determine the main impact direction; comparing the anchor chain dynamics with the standard curve; and adjusting the position of the self-floating support through a deployment and retrieval mechanism. The system includes a deployment and retrieval mechanism, three-dimensional simulation, two-dimensional simulation, and an anchor chain dynamic control module, realizing intelligent dynamic control of the anchor chain. This invention can accurately respond to wave impacts, improve the stability and impact resistance of the anchoring system, and is suitable for offshore anchoring scenarios such as wave energy power generation.

The present invention relates to an arrangement for retrieving broken moorings comprising: at least three shackles; at least two slings; at least one mooring; at least one hook; at least one ROV needle rope; and a treble hook. The upper end of the mooring is connected to a working rope with a swivel link, and the lower end of the mooring is connected to the treble hook. In addition, the invention also describes a method for retrieving broken moorings, using said arrangement for retrieving moorings, comprising the following steps: positioning a treble hook close to a mooring to be retrieved; passing a sling around the mooring; connecting a sling to the hook; applying traction; and accommodating the mooring. In this way, the invention combines the flexibility and adaptability necessary to operate in different suspension conditions on the seabed, ensuring the efficient retrieval of the broken moorings, both in environments with high-suspension seabeds and in low-suspension seabeds.

A magnet activatable release apparatus (1), an assembly comprising the apparatus, and a method of using the assembly, wherein the apparatus comprises a locking device (20) comprising at least one latch element (22) for engaging the releasable coupling device (50) when connected to the apparatus (1), the locking device (20) being movable by means of a trigger element (30) between a locking first position, and a releasing second position wherein the releasable locking device is released from the apparatus.

The utility model discloses a mooring rope anode sacrifice block protection device which comprises a steel cable and a mooring rope anchorage device, one end of the mooring rope anchorage device is connected with the steel cable, the outer wall of the mooring rope anchorage device is connected with a lifting point, and the mooring rope anchorage device achieves underwater lifting through the lifting point. An anode sacrifice block is arranged at the end, away from the steel cable, of the mooring cable anchorage device, a protection block is clamped to the anode sacrifice block so that the anode sacrifice block can be fixed to one end of the mooring cable anchorage device, the end, provided with the anode sacrifice block, of the mooring cable anchorage device is connected with a pin shaft, and the end, away from the mooring cable anchorage device, of the pin shaft is connected to the seabed. According to the mooring cable anode sacrifice block protection device, the protection block is clamped on the anode sacrifice block, so that the anode sacrifice block is fixed at one end of the mooring cable anchorage device, and on the basis that the original mooring cable anchorage device and the anode sacrifice block are connected through bolts, the protection block is used for achieving the purpose of protecting, optimizing and upgrading the anode sacrifice block for the mooring cable; assembly is simple and convenient.

The utility model relates to the field of maritime affair equipment, in particular to a ship anchor support. The technical problems that in the process of recovering the ship anchor, after the ship anchor is recovered to a ship anchor support, due to the fact that an anchor locking device or a chain stopping device is usually not installed in the ship anchor support, an anchor gear needs to be powered off to fix the ship anchor after the ship anchor is recovered, a large load is caused to the anchor gear, and damage and aging of the anchor gear are aggravated are solved. According to the technical scheme, the ship anchor support comprises a cushion supporting assembly, a rolling and sliding assembly and a fixing assembly. Through the arrangement of the cushion support fixing mechanism and the clamping and meshing mechanism, the ship anchor support can support the bottom end of the ship anchor to prevent the ship anchor from falling after the ship anchor is withdrawn, and the lock chain connected with the ship anchor is clamped and meshed, so that the ship anchor can be fixed by the ship anchor support on the premise of not depending on an anchor gear.

The utility model discloses a rust-proof anchor windlass which comprises an engine, a speed reducer and an anchor chain wheel. The engine and the speed reducer are connected through the coupler, and the speed reducer and the cable lifter are connected through the gearbox. A protective shell is arranged on the periphery of the cable lifter and composed of side plates, a top cover and a bottom plate. An air inlet channel extends from the right side plate, and a fan is mounted in the air inlet channel; vent holes are formed in the tops of the side plates; the top cover is hinged to the side plates through hinges, and baffles extend downwards from the periphery of the top cover. A hole is formed in the rear side plate, and an anchor chain is arranged in the hole and connected with an anchor chain wheel. Through the synergistic effect of the engine, the speed reducer, the gear box and the cable lifter, dragging, anchor weighing and anchor dropping operations of an anchor chain are achieved; meanwhile, through the design of the protective shell, the cable lifter and the anchor chain are effectively prevented from being corroded by the external environment, particularly rusting is prevented, the service life of the cablelifter is prolonged, and the reliability of the cablelifter is improved.

The utility model discloses a vessel toy and anchor chain device which comprises a shell, a driving device, a transmission device, an anchor chain and a travel switch, the transmission device is arranged in the shell and comprises a speed reduction screw, a speed reduction worm gear and a speed reduction gear set, and the speed reduction screw is in transmission connection with the speed reduction worm gear and the speed reduction gear set. The driving device is fixed to one side of the shell and is in transmission connection with the speed reduction screw, the speed reduction gear set is sleeved with the travel switch, and the anchor chain is wound around the speed reduction worm gear. Wherein the driving device is used for driving the speed-reducing screw to rotate, the speed-reducing gear set is used for reducing the rotating speed of the speed-reducing screw and increasing the torque of the speed-reducing screw, the speed-reducing screw is used for driving the speed-reducing worm gear to rotate, the speed-reducing worm gear is used for controlling winding and unwinding of the anchor chain, and the travel switch is used for controlling the winding and unwinding length of the anchor chain. The folding and unfolding length of the anchor chain of the ship toy can be accurately controlled, the electronic control cost is reduced, installation is convenient, cost is reduced, efficiency is improved, and practicability is high.

An anchoring device for anchoring a floating object to an anchor structure, including a first attachment for being constrained to the floating object; a second attachment for being constrained to the anchor structure; a damping member for damping the relative motion between the attachments for securing the first attachment to the second attachment and including a sliding chamber, a piston for sliding in the sliding chamber according to a relative motion between the attachments and a damper for damping the sliding of the piston in the sliding chamber; and a control unit including a measurement sensor for measuring the sliding of the piston; and a control board for varying the damping of the damper according to the sliding of the piston detected by the measurement sensor.

The application provides an unmanned ship emergency anchor throwing system and relates to the technical field of unmanned ships. The unmanned ship emergency anchor throwing system comprises a ship body, a ship anchor mechanism, an unhooking mechanism and an anchor throwing control assembly. The unhooking mechanism is hung on the ship anchor mechanism, and the unhooking mechanism can throw the anchor through two modes of an unhooking push rod and a pull rope. The anchor throwing control assembly comprises an unmanned ship main control box, a power supply module, an unhooking mechanism control device and a detection sensor. When the unhooking push rod of the unmanned ship emergency anchor throwing system fails or the anchor throwing force is insufficient, resulting in anchor throwing failure, the system automatically switches to the pull rope mode to unhook and perform anchor throwing operation, thereby improving the success rate of anchor throwing and the stability of equipment operation. The anchor is thrown by using the unhooking mechanism, the use of a hydraulic or electric anchor device is reduced, and the influence of the weight of the equipment on the weight of the unmanned ship is reduced.

The invention relates to the technical field of ship equipment, and discloses a ship body berthing anti-collision stabilizing device which comprises a support arranged on a ship body, the support is installed on the ship body through bolts, a balance weight rod is arranged on the support, the balance weight rod is connected with the support in a sliding mode, and the support has a buffering function and is used for buffering the balance weight rod when the ship body drives the support to shake. The thrust generated by shaking is buffered and reduced in the process that the thrust is transmitted to the balance weight lever, the residual thrust is counteracted through the gravity of the balance weight lever, the stability of the ship body is guaranteed, the support and the balance weight lever are arranged, independent protection measures can be taken around the ship body, the ship body is limited, the collision blank is avoided, and the safety of the ship body is improved. Meanwhile, the device is arranged on the ship body, the mooring anti-collision stability requirements of the ship body at different positions are better met, the device can be installed on the ship body after being prefabricated, large-scale building is not needed, and cost is low.

The invention discloses an anchor system laying device and method, a holding power anchor and a gravity anchor can enter water in sequence through a crane and a crane, the anchor system laying device comprises a winch, a ground command, the crane and the crane, the winch is arranged on a deck of a workboat, the winch is provided with a mooring rope, and the mooring rope can be wound on the winch; the ground wire is arranged on a deck of the workboat; the crane is arranged on a deck of the workboat and provided with a first pulley, and the mooring rope bypasses the first pulley to be connected with the gravity anchor. The crane is provided with a second pulley, a traction rope is wound on the second pulley, the traction rope penetrates through a lifting ring of the holding anchor and is connected to the ground wire, and the second pulley can pull the holding anchor through the traction rope; the crane is arranged on a deck of the workboat, provided with a lifting hook and capable of being connected with the gravity anchor through the lifting hook so as to adjust the position of the gravity anchor.