A crane-based add-on lifting system

Abstract

The present invention belongs to a crane-based add-on lifting system, which is connected to the crane boom. The lifting system includes an electronic control system, a support arm, a winch, an anti-sway device, a sling and a special storage device. One end of the support arm is connected to the crane boom, and the other end of the support arm is connected to the anti-sway device. The winch is connected to the anti-sway device, and the anti-sway device is usually stored above the special storage device. The present invention is modified on the basis of an existing crane, and a work boat lifting system is added. Comprehensive consideration is taken to meet the needs in the most cost-effective manner. The lifting system uses the existing crane as an installation platform and has an independent lifting power system. The complete lifting and recovery of the work boat can be achieved by utilizing the amplitude variation and rotation functions of the existing crane.

Description

Technical Field

[0001] The present invention belongs to the technical field of hoisting systems, and particularly relates to a crane-based add-on hoisting system. Background Art

[0002] The existing vessel needed to be equipped with the function of lifting and lowering a workboat. Considering factors such as the equipment installation space, the reinforcement of the existing deck structure, and the construction period, it was decided to modify the existing crane to add the function of lifting and lowering a workboat.

[0003] Analysis shows that the weight of the workboat is far less than the workload of the existing crane. Therefore, no additional changes (reinforcement) are required to the main structure and foundation of the existing crane. Therefore, the modification of the existing crane can be completed by simply designing a lifting system that can accommodate the workboat and making a connection interface with the existing crane. Summary of the Invention

[0004] The present invention belongs to a crane-based add-on lifting system, which is connected to the crane boom. The lifting system includes an electronic control system, a support arm, a winch, an anti-sway device, a sling and a special storage device. One end of the support arm is connected to the crane boom, and the other end of the support arm is connected to the anti-sway device. The winch is connected to the anti-sway device, and the anti-sway device is usually stored above the special storage. The present invention is modified on the basis of an existing crane, and a work boat lifting system is added. Comprehensive consideration is taken to meet the needs in the most cost-effective manner. The lifting system uses the existing crane as an installation platform and has an independent lifting power system. The complete lifting and recovery of the work boat can be achieved by utilizing the amplitude variation and rotation functions of the existing crane.

[0005] The support arm is in the shape of a box structure, with a boom connector at one end and an arc-shaped pin ear at the other end. The boom connector is connected to the crane boom by bolts, and the arc-shaped pin ear is connected to the anti-sway device through a pin-type sensor. The support arm connected through the pin-type sensor can be firmly connected to the crane boom, and the lifting system is powered by the crane through the electronic control system.

[0006] The winch is mainly composed of a motor, a reducer, a drum, a connecting shaft, etc. The winch uses an anti-sway device as an installation platform. A sling is wound around the winch, and the sling can be retracted and extended by rotating the winch drum.

[0007] The sling is installed inside the anti-sway device, one end of the sling is connected to the winch, and the other end of the sling is hung inside the anti-sway device. The roller device inside the cylinder of the anti-sway device can ensure that the lifted workboat can be stably placed under the anti-sway device when the sling is raised / lowered.

[0008] The main body of the anti-sway device is in the shape of a round tube, one end of the anti-sway device is the mounting platform of the winch, the other end of the anti-sway device is provided with a trumpet anti-sway mouth extending outward, and the side of the anti-sway device is provided with an observation opening, and the observation opening is waist-shaped, and the observation opening is arranged through the side of the upper part of the anti-sway device, and one end of the sling is suspended in the middle of the observation opening. The anti-sway device is usually stored obliquely above the special storage device, and a rigid constraint is generated by the trumpet-shaped anti-sway mouth and the lifting point of the work boat pulled up by the sling to prevent offset and displacement in one dimension during the movement of the crane and the shaking of the mother ship.

[0009] The special storage device is a rectangular frame made of steel sections. The left and right sides of the special storage device are V-shaped structures. The top of the V-shaped structure is provided with an elastic pad. Operating platforms are provided on both sides of the special storage device. A hook storage ring is provided on the left side of the special storage device. Locking devices are provided on both sides and the left side of the middle part of the special storage device. The special storage device is connected to the anti-sway device through the locking device. The hook storage ring is provided with a crane hook, and the crane hook is connected to the special storage device through a lashing rope. The special storage device gives an effective angle to give a stable placement angle to the anti-sway device. This angle can not only ensure stable placement but also efficiently and quickly connect to the crane boom and allow the crane to lift the lifting system without interference. At the same time, the special storage device is also provided with a fixed structure to fix the lifting system and can also fix the heavy hook of the crane, making the system a whole.

[0010] Beneficial effects:

[0011] The present invention is to modify the existing crane and add a workboat lifting system, comprehensively considering the needs in the most cost-effective way. The lifting system uses the existing crane as the installation platform and has an independent lifting power system. The luffing and slewing functions of the existing crane can realize the complete lifting and recovery of the workboat. The support arm connected to the anti-sway device is connected to the anti-sway device through a pin-type sensor. The support arm connected to the pin-type sensor can be firmly connected to the crane boom, and the lifting system is powered by the crane through the electric control system. The winch is used to realize the retraction and extension of the sling. The roller device inside the cylinder of the anti-sway device can ensure that the sling can be lifted / lowered when the sling is lifted / lowered. The hoisted workboat is stably installed under the anti-sway device, and a rigid constraint is generated by the trumpet-shaped anti-sway mouth and the lifting point of the workboat pulled up by the sling to prevent offset and displacement in one dimension during the movement of the crane and the shaking of the mother ship. The special storage device provides an effective angle to give a stable placement angle to the anti-sway device. This angle can not only ensure stable placement but also efficiently and quickly connect the crane boom and allow the crane to lift the lifting system without interference. At the same time, the special storage device is also equipped with a fixed structure to fix the lifting system and the heavy hook of the crane, making the system a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a crane-based add-on lifting system;

[0013] Figure 2 It is a top-down cross-sectional view of the winch of a crane-based, retrofitted lifting system;

[0014] Figure 3 It is a side view of the interior of the anti-sway device of the crane-based retrofit lifting system;

[0015] In the figure; 1. electronic control system, 2. support arm, 3. winch, 4. anti-sway device, 5. sling, 6. special storage device, 7. crane boom, 8. counterweight, 9. lifting point, 10. motor, 11. reducer, 12. drum, 13. connecting shaft. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0017] Electronic control system 1, support arm 2, winch 3, anti-sway device 4, lifting rope 5, special storage device 6, crane boom 7, counterweight 8, lifting point 9, motor 10, reducer 11, drum 12, connecting shaft 13.

[0018] like Figure 1 As shown;

[0019] A crane-based retrofit hoisting system, the hoisting system is connected to the crane boom 77, the hoisting system includes an electric control system 1, a support arm 2, a winch 3, an anti-sway device 4, a sling 5 and a dedicated storage device 6, one end of the support arm 2 is connected to the crane boom 7, the other end of the support arm 2 is connected to the anti-sway device 4, the winch 3 uses the anti-sway device 4 as an installation platform, the anti-sway device 4 is usually stored above the dedicated storage device 6, the support arm 2 is a box-shaped structure, one end of the support arm 2 is provided with a boom connector, the other end of the support arm 2 is provided with an arc-shaped pin ear, the boom connector is connected to the crane boom 7, and the other end of the support arm 2 is provided with an arc-shaped pin ear. It is connected to the crane boom 7 through bolts, and the arc-shaped pin ear is connected to the anti-sway device 4 through a pin-type sensor. The winch 3 is mainly composed of a motor 10, a reducer 11, a drum 12, a connecting shaft 13, etc. The winch 3 uses the anti-sway device 4 as an installation platform, and a sling 5 is wound around the winch 3. The sling 5 is arranged inside the anti-sway device 4, one end of the sling 5 is connected to the winch 3, and the other end of the sling 5 is hung inside the anti-sway device 4. The main structure of the anti-sway device 4 is a round tube, one end of the anti-sway device 4 is connected to the support arm 2, and the other end of the anti-sway device 4 is provided with an outwardly extending horn anti-sway mouth, which can prevent An observation opening is provided on the side of the swing device 4. The observation opening is waist-shaped. The observation opening is provided on the side of the upper part of the anti-sway device 4. One end of the sling 5 is suspended in the middle of the observation opening. The anti-sway device 4 is usually stored obliquely above the special storage device 6. The special storage device 6 is a rectangular frame composed of steel sections. The left and right sides of the special storage device 6 are both V-shaped structures. The top of the V-shaped structure is provided with an elastic pad. Operating platforms are provided on both sides of the special storage device 6. A hook storage ring is provided on the left side of the special storage device. Locking devices are provided on both sides and the left side of the middle of the special storage device 6. The special storage device 6 is connected to the anti-sway device 4 through the locking device. The hook storage ring is provided with a crane hook. The crane hook is connected to the special storage device 6 through a lashing rope. The special storage device 6 gives an effective angle to give a stable placement angle to the anti-sway device 4. This angle can not only ensure stable placement but also efficiently and quickly connect the crane boom 7 and allow the crane to lift the lifting system without interference. At the same time, the special storage device 6 is also provided with a fixed structure to fix the lifting system while also fixing the heavy hook of the crane, making a system a whole.

[0020] Implementation examples;

[0021] Release the work boat: hook the hook (including the counterweight 8) of the existing crane on the storage ring of the dedicated storage device 6 for the additional lifting system, release the existing crane sling 5 until the weight of the hook (including the counterweight 8) is completely transferred to the storage ring, and tie the hook (including the counterweight 8) with a lashing rope to prevent it from shaking; open the locking device of the support arm 2 of the additional lifting system and rotate it upward to connect the support arm 2 to the pulley housing of the existing crane head; connect all electrical plugs and sockets properly, and power the electrical control box; release the storage constraint of the dedicated storage device 6 on the anti-sway device 4, the crane will lift the additional lifting system and move it to the area where the boat is to be lifted → hook and lift the work boat and then move it outboard to release the boat → release all work boats back and forth → lift the additional lifting system back to its dedicated storage device 6 and secure it firmly.

[0022] Recovering the small boat: (if the crane is disconnected from the additional lifting system); hook the hook (including the counterweight 8) of the existing crane on the storage ring of the dedicated storage device 6 of the additional lifting system, release the existing crane sling 5 until the weight of the hook (including the counterweight 8) is completely transferred to the storage ring, and tie the hook (including the counterweight 8) with a lashing rope to prevent it from shaking; open the locking device of the support arm 2 of the additional lifting system and rotate it upward to connect the support arm 2 to the pulley housing of the head of the existing crane; connect all electrical plugs and sockets properly, and power the electrical control box; release the storage constraint of the dedicated storage device 6 on the anti-sway device 4, the crane will lift the additional lifting system and move it to the area for boats to be recovered → lift the workboat and move it to the workboat storage area → store and secure the workboat → reciprocate to recover all workboats; after the workboat is deployed, lift the additional lifting system back to its dedicated storage device 6 and secure it firmly → turn off the power to the electrical control box → disconnect the electrical quick-connect plugs and sockets between the junction box and the additional device.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crane-based lifting system, characterized in that: The hoisting system is connected to the crane boom and includes an electric control system, a support arm, a winch, an anti-sway device, a sling, and a dedicated storage device. One end of the support arm is connected to the crane boom, and the other end of the support arm is connected to the anti-sway device. The winch is connected to the anti-sway device, and the anti-sway device is located above the dedicated storage device. The support arm is in a box-shaped structure, with a boom connector at one end and an arc-shaped pin ear at the other end. The boom connector is connected to the crane boom via bolts, and the arc-shaped pin ear is connected to one end of the anti-sway device via a pin-type sensor. The special storage device is a rectangular frame made of steel sections. The left and right sides of the special storage device are V-shaped structures. The top of the V-shaped structure is provided with an elastic pad. Operating platforms are provided on both sides of the special storage device. A hook storage ring is provided on the left side of the special storage device. Locking devices are provided on both sides and the left side of the middle part of the special storage device. The special storage device is connected to the anti-sway device through the locking device. The hook storage ring is provided with a crane hook, and the crane hook is connected to the special storage device through a lashing rope.

2. The crane-based retrofitting lifting system according to claim 1, characterized in that: The winch includes a motor, a reducer, a drum and a connecting shaft. The winch is arranged on the anti-sway device, and a sling is provided on the outside of the winch. The motor is arranged on the outside of the anti-sway device. The reducer is connected to the connecting shaft, and the connecting shaft is connected to the anti-sway device. The connecting shaft and the reducer are arranged inside the anti-sway device. A drum is provided on the outside of the connecting shaft and the reducer, and a sling is wound around the outside of the drum.

3. The crane-based retrofitting lifting system according to claim 2, characterized in that: The sling is arranged inside the anti-sway device, one end of the sling is connected to the winch, and the other end of the sling is hung inside the anti-sway device.

4. The crane-based retrofitting lifting system according to claim 3, characterized in that: The main body of the anti-sway device is in the shape of a round tube, a winch is provided on the inner side of one end of the anti-sway device, and a trumpet anti-sway mouth extending outward is provided at the other end of the anti-sway device. An observation opening is provided on the side of the anti-sway device, and the observation opening is waist-shaped. The observation opening is arranged through the side of the upper part of the anti-sway device, and one end of the sling is suspended in the middle of the observation opening. The anti-sway device is arranged obliquely above the dedicated storage device.

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