Rapid installation system suitable for fixed tail crane back pull steel wire rope of large floating crane ship

Abstract

The utility model discloses a quick mounting system suitable for a back-pulling steel wire rope of a fixed tail crane of a large floating crane ship, which belongs to the technical field of ships and is characterized in that an axial limiting guide frame is arranged at the rear end part of a back-pulling lug plate, a deck guide pulley is hinged on a deck through a steel wire rope, and the deck guide pulley is arranged on one side edge of the axial limiting guide frame; one end of the main traction steel wire rope is connected with the back-pull steel wire rope pulley block and then sequentially penetrates through the axial limiting guide frame, the deck guide pulley block and the guide roller; the other end of the main traction steel wire rope is connected with a ship mooring winch. The system solves the technical problem of accurate and rapid alignment of the deck back-pulling lug plate and the back-pulling steel wire pulley block lug plate, the offshore operation efficiency is improved, the back-pulling tool is used, the back-pulling steel wire pulley block always advances along the route of the deck back-pulling lug plate, after the back-pulling steel wire pulley block is dragged in place, the back-pulling steel wire pulley block lug hole and the deck back-pulling lug plate lug hole are automatically aligned, and the operation efficiency is improved. Accurate and rapid installation of the deck back-pulling lug plate and the back-pulling steel wire pulley block lug plate is achieved.

Description

Technical Field

[0001] This utility model relates to the field of marine technology, and more specifically, to a rapid installation system for the back-pulling steel wire rope of a fixed stern crane on a large floating crane vessel. Background Technology

[0002] Large floating crane vessels typically operate in three modes: full-rotation mode, stern-lift mode, and fixed stern-lift mode. Currently, some large floating crane vessels on the market require a back-pull system when switching to fixed stern-lift mode. The back-pull steel cable is pulled from the crane's A-frame to the deck back-pull lugs and connected to them. This allows the ship's main crane to enter back-pull operation mode, thereby increasing the crane's maximum lifting capacity and meeting operational requirements. On some vessels, the back-pull lugs are located at the bow near the living quarters to provide better stress distribution and reduce the structural strength requirements at the back-pull point.

[0003] Currently, the traction pulley block for back-pull wire ropes is typically towed by a deck mooring winch located near the living quarters at the bow. This is done in conjunction with a side crane, forklift, and hand-operated hoist to fit the lugs of the back-pull wire rope pulley block into the deck back-pull lugs. A forklift is then used to insert the pins into the lug holes, completing the installation of the back-pull system.

[0004] The pin installation requires high precision, with the gap generally within 2mm. It is difficult to align the ear holes of the pulley block ear plate with the ear holes of the back pull ear plate by relying solely on winch pulling. It usually requires multiple coordinations of cranes, forklifts and hand chain hoists, repeated attempts, and has a certain degree of uncontrollability and randomness. It is time-consuming and laborious, usually taking 6-8 hours. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an auxiliary installation device that accurately and quickly aligns the deck back pull plate with the back pull steel wire pulley block ear plate, thereby achieving rapid installation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a quick installation system for the back-pull steel wire rope of a fixed stern crane on a large floating crane vessel, including a back-pull lug plate and a back-pull steel wire rope pulley block fixed on the deck. The front end of the back-pull lug plate is inserted into the back-pull steel wire rope pulley block and locked and limited by a pin. It also includes an axial limiting guide frame, a traction main steel wire rope and a deck guide pulley. The axial limiting guide frame is located at the rear end of the back-pull lug plate. The deck guide pulley is hinged to the deck by a steel cable and is located on one side of the axial limiting guide frame. One end of the traction main steel wire rope is connected to the back-pull steel wire rope pulley block and then passes through the axial limiting guide frame, the deck guide pulley block and the guide roller in sequence. The other end of the traction main steel wire rope is connected to the ship's mooring winch.

[0007] Preferably, the main traction wire rope and the back tension wire rope pulley block are connected by a V-shaped traction wire rope. The V-shaped traction wire rope consists of two wire ropes. The ends of the two wire ropes are fixed to the eye plate of the back tension wire rope pulley block, and the other ends of the two wire ropes are fixed together and fixed to the main traction wire rope.

[0008] Preferably, the axial limiting guide frame includes columns, a base plate, roller ear plates and rollers. Four columns are provided on the bottom surface of the base plate, and two roller ear plates are provided on the top surface of the base plate. The rollers are placed between the two roller ear plates and limited between the two roller ear plates by pins.

[0009] Preferably, a wire rope anti-detachment pin is provided at the top of the two roller ear plates, and the wire rope anti-detachment pin is arranged laterally between the two roller ear plates.

[0010] Preferably, a reinforcing elbow plate is provided between two adjacent columns, between the column and the base plate, and between the roller lug plate and the base plate.

[0011] Preferably, the back pull plate includes a pin hole, and a height limiting inclined plate, an axial limiting end plate and a guide ramp are provided on both sides of the outer periphery of the pin hole. The height limiting inclined plate is located on the upper side of the pin hole, the axial limiting end plate is located directly behind the pin hole, and the guide ramp is located at the bottom of the pin hole.

[0012] Preferably, a reinforcing elbow plate is provided between the height limiting inclined plate, the axial limiting end plate, and the guide ramp plate and the back pull ear plate body.

[0013] Preferably, the top surface of the guide ramp is provided with an anti-wear pad, which is wedge-shaped and serves both to prevent wear and to adjust the height.

[0014] Preferably, the deck guide pulley includes a fixed guide pulley and a shackle, the fixed guide pulley is connected to the shackle, and the shackle is hinged to the lugs on the deck.

[0015] Preferably, the guide roller is located on one side of the ship's mooring winch.

[0016] By adopting the technical solution of this utility model, the following beneficial effects can be obtained:

[0017] This installation system solves the technical problem of precise and rapid alignment between the deck back pull lug and the back pull wire pulley block lug, improving the efficiency of offshore operations. Using this back pull tool, the back pull wire pulley block always travels along the route of the deck back pull lug. After being pulled into place, the lug holes of the back pull wire pulley block and the lug holes of the deck back pull lug are automatically aligned, avoiding a lot of auxiliary adjustment work and achieving precise and rapid installation of the deck back pull lug and the back pull wire pulley block lug. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the back tension steel wire rope installation system;

[0020] Figure 2 for Figure 1 Enlarged view of a specific area;

[0021] Figure 3 for Figure 1 A schematic diagram showing the structure with the back bracing steel wire in place.

[0022] Figure 4 for Figure 1 Schematic diagram of the central axis limiting guide frame;

[0023] Figure 5 for Figure 1 Schematic diagram of the structure of the middle back pull tab;

[0024] Figure 6 for Figure 5 Side view;

[0025] Figure 7 for Figure 1 Schematic diagram of the guide pulley on the middle deck;

[0026] The markings in the above figures are as follows: 1. Back tension lug; 2. Back tension wire rope pulley block; 3. Axial limiting guide frame; 4. Main traction wire rope; 5. Deck guide pulley; 6. V-shaped traction wire rope; 7. Guide roller; 8. Ship mooring winch; 9. Column; 10. Base plate; 11. Roller lug; 12. Roller; 13. Wire rope anti-derailment pin; 14. Reinforcing elbow plate; 15. Pin hole; 16. Height limiting inclined plate; 17. Axial limiting end plate; 18. Guide ramp plate; 19. Anti-wear pad; 20. Guide fixed pulley; 21. Shackle. Detailed Implementation

[0027] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part.

[0028] like Figure 1-3As shown, this is a rapid installation system for the back-pull wire rope of a fixed stern crane on a large floating crane vessel. It includes a back-pull lug 1 and a back-pull wire rope pulley block 2 fixed on the deck. The front end of the back-pull lug 1 is inserted into the back-pull wire rope pulley block 2 and locked and limited by a pin. It also includes an axial limiting guide frame 3, a traction main wire rope 4 and a deck guide pulley 5. The axial limiting guide frame 3 is located at the rear end of the back-pull lug 1. The deck guide pulley 5 is hinged to the deck by a steel cable and is located on one side of the axial limiting guide frame 3. One end of the traction main wire rope 4 is connected to the back-pull wire rope pulley block 2 and then passes through the axial limiting guide frame 3, the deck guide pulley block 5 and the guide roller 7 in sequence. The other end of the traction main wire rope 4 is connected to the ship's mooring winch 8. The main traction wire rope 4 and the back tension wire rope pulley block 2 are connected by a V-shaped traction wire rope 6. The V-shaped traction wire rope 6 consists of two wire ropes. The ends of the two wire ropes are fixed to the eye plate of the back tension wire rope pulley block 2, and the other ends of the two wire ropes are fixed together and fixed to the main traction wire rope 4. The guide roller 7 is set on one side of the ship mooring winch 8.

[0029] like Figure 4 As shown, the axial limiting guide frame 3 includes columns 9, a base plate 10, roller ear plates 11, and rollers 12. Four columns 9 are mounted on the bottom surface of the base plate 10, and two roller ear plates 11 are mounted on the top surface of the base plate 10. Rollers 12 are positioned between the two roller ear plates 11 and are limited between them by pins. A wire rope anti-detachment pin 13 is mounted on the top of the two roller ear plates 11, and is laterally positioned between the two roller ear plates 11 to prevent the wire rope from slipping off the rollers 12 under stress. Reinforcing elbow plates 14 are mounted between two adjacent columns 9, between the columns 9 and the base plate 10, and between the roller ear plates 11 and the base plate 10. The reinforcing elbow plates 14 are used to strengthen the structural strength.

[0030] like Figure 5 , 6 As shown, the back pull plate 1 includes a pin hole 15. A height limiting inclined plate 16, an axial limiting end plate 17, and a guide ramp plate 18 are provided on both sides of the outer periphery of the pin hole 15. The height limiting inclined plate 16 is located on the upper side of the pin hole 15, the axial limiting end plate 17 is located directly behind the pin hole 15, and the guide ramp plate 18 is located at the bottom of the pin hole 15. A reinforcing elbow plate 14 is provided between the height limiting inclined plate 16, the axial limiting end plate 17, and the guide ramp plate 18 and the main body of the back pull plate 1. Figure 5 As shown, an anti-wear pad 19 is provided on the top surface of the guide ramp 18. The anti-wear pad 19 is wedge-shaped and serves both as an anti-wear pad and as a height adjustment device. The entire device is a back-pull steel wire pulley block ear hole limiting device.

[0031] like Figure 7As shown, the deck guide pulley includes a guide fixed pulley 20 and a shackle 21. The guide fixed pulley 20 is connected to the shackle 21, and the shackle 21 is hinged to the ear plate on the deck.

[0032] The following steps should be followed when using it:

[0033] (1) When it is necessary to use the fixed stern crane mode for lifting large parts according to the needs of the project, the crane shall be rotated to the designated position and angle at the stern of the ship;

[0034] (2) Lower the back-pull steel wire rope pulley block 2 from the boom frame to the main deck position;

[0035] (3) Install two V-shaped short steel wire ropes on the ear plate of the back pulley block 2 and connect them to the main traction steel wire rope 4 through shackles;

[0036] (4) When the main traction wire rope 4 is in a slack state, use a forklift to guide the main traction wire rope 4 into the groove of the guide roller 12 of the axial limiting guide frame 3.

[0037] (5) Install the steel wire rope anti-detachment pin 13 on the upper part of the axial limit guide frame 3, tighten the bolts, and insert the safety pin;

[0038] (6) Open the deck guide pulley 5, thread the main traction steel wire rope 4 into the groove of the guide fixed pulley 20, and reinstall the guide pulley sealing plate;

[0039] Steps (4), (5), and (6) can be performed simultaneously.

[0040] (7) The main traction wire rope 4 is connected to the drum of the ship's mooring winch 8 by changing direction through the guide roller 7 on the deck;

[0041] (8) Operate the ship mooring winch 8, retrieve the main traction wire rope 4, and drag the back pull wire rope pulley block 2 forward along the center of the axial limit guide frame 3. The back pull wire rope winch of the boom platform releases the back pull wire rope simultaneously.

[0042] (9) When the back-pulling wire rope pulley block 2 approaches the deck back-pulling ear plate 1, reduce the traction speed and let the ear plate of the back-pulling wire rope pulley block 2 slowly approach the guide ramp plate 18, and the arc surface of the ear plate slowly moves upward along the guide ramp plate 18.

[0043] (10) When the end of the ear plate of the back-pull wire rope pulley block 2 approaches the axial limiting end plate 17, the mooring winch is switched to jogging, and the forward distance of the back-pull wire rope pulley block 2 is finely adjusted until the end of the ear plate is completely in close contact with the axial limiting end plate 17. The winch is braked to maintain the force, and at this time the ear hole of the ear plate of the back-pull wire rope pulley block 2 is precisely aligned with the ear hole of the deck back-pull ear plate 1;

[0044] (11) Insert the back-pull pin, install the pin end baffle, and the back-pull operation is complete;

[0045] (12) Disassemble all connecting shackles, remove the V-shaped traction wire rope 6 and the traction main wire rope 4, and recover the traction system.

[0046] Using this system, back-pull operations can be completed in one go, reducing the operation time from the usual 6-8 hours to 2-3 hours, ensuring the execution of offshore construction plans. The back-pull wire rope pulley block 2 can travel along a predetermined route through this device. The route is controlled and unique, requiring no additional adjustments. The ear plates of the back-pull wire rope pulley block 2 can be fitted onto the deck back-pull ear plates 1 in one go.

[0047] The axial limiting guide frame 3 is equipped with rollers 12, which can rotate freely. The traction wire rope has no relative movement with the rollers 12 in the groove of the rollers 12, which avoids wear of the traction wire rope, improves the safety of operation, and can greatly increase the service life of the traction wire rope.

[0048] A steel wire rope anti-detachment pin 13 is installed at the top of the axial limiting guide frame 3. After the steel wire rope is initially placed into the roller 12 in a slack state, the anti-detachment pin is inserted into the roller ear plate. This ensures that the traction steel wire rope will not slip out of the groove of the roller 12 during the entire traction operation, avoiding the traction steel wire rope jumping due to the instantaneous release of force after the steel wire rope is stuck under force, thus preventing it from detaching from the groove of the roller 12 and improving the safety of the operation.

[0049] By using the ship's existing winch and guidance systems, the need for additional power units and guidance devices can be avoided, thereby improving the utilization rate of ship equipment and saving costs.

[0050] This system improves the reliability and controllability of back-pull operations. Under the operation of this system, the overall back-pull operation time is controllable, eliminating the randomness and luck that often occur in the original conventional methods. The entire back-pull operation can be effectively controlled within the planned range.

[0051] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A rapid installation system for back-pull steel wire ropes for fixed stern cranes on large floating crane vessels, comprising a back-pull lug plate and a back-pull steel wire rope pulley assembly fixed on the deck, wherein the front end of the back-pull lug plate is inserted into the back-pull steel wire rope pulley assembly and locked and limited by a pin, characterized in that: It also includes an axial limiting guide frame, a main traction wire rope, and a deck guide pulley. The axial limiting guide frame is located at the rear end of the back pull plate. The deck guide pulley is hinged to the deck by a steel cable and is located on one side of the axial limiting guide frame. One end of the main traction wire rope is connected to the back pull wire rope pulley group and then passes through the axial limiting guide frame, the deck guide pulley group, and the guide roller in sequence. The other end of the main traction wire rope is connected to the ship's mooring winch.

2. The rapid installation system for the stern-mounted back-pull steel wire rope of a large floating crane vessel according to claim 1, characterized in that: The main traction wire rope and the back tension wire rope pulley block are connected by a V-shaped traction wire rope. The V-shaped traction wire rope consists of two wire ropes. The ends of the two wire ropes are fixed to the eye plate of the back tension wire rope pulley block, and the other ends of the two wire ropes are fixed together and fixed to the main traction wire rope.

3. The rapid installation system for the back-pulling steel wire rope of a fixed stern crane on a large floating crane vessel according to claim 1, characterized in that: The axial limiting guide frame includes columns, a base plate, roller lugs and rollers. Four columns are provided on the bottom surface of the base plate, and two roller lugs are provided on the top surface of the base plate. The rollers are placed between the two roller lugs and limited between the two roller lugs by pins.

4. The rapid installation system for the stern-mounted back-pull steel wire rope of a large floating crane vessel according to claim 3, characterized in that: The top of the two roller ear plates is provided with a wire rope anti-detachment pin, which is horizontally arranged between the two roller ear plates.

5. The rapid installation system for the stern-mounted back-pull steel wire rope of a large floating crane vessel according to claim 3, characterized in that: A reinforcing elbow plate is installed between two adjacent columns, between the column and the base plate, and between the roller lug plate and the base plate.

6. The rapid installation system for the back-pulling steel wire rope of a fixed stern crane on a large floating crane vessel according to claim 1, characterized in that: The back pull plate includes a pin hole, and a height limiting inclined plate, an axial limiting end plate and a guide ramp are provided on both sides of the outer periphery of the pin hole. The height limiting inclined plate is located on the upper side of the pin hole, the axial limiting end plate is located directly behind the pin hole, and the guide ramp is located at the bottom of the pin hole.

7. The rapid installation system for the back-pulling steel wire rope of a fixed stern crane on a large floating crane vessel according to claim 6, characterized in that: A reinforcing elbow plate is provided between the height limiting inclined plate, the axial limiting end plate, the guide ramp plate and the back pull ear plate body.

8. The rapid installation system for the stern-mounted back-pull steel wire rope of a large floating crane vessel according to claim 7, characterized in that: The top surface of the guide ramp is provided with a wear-resistant pad, which is wedge-shaped and serves both to prevent wear and to adjust the height.

9. The rapid installation system for the back-pulling steel wire rope of a fixed stern crane on a large floating crane vessel according to claim 1, characterized in that: The deck guide pulley includes a fixed guide pulley and a shackle. The fixed guide pulley is connected to the shackle, and the shackle is hinged to the lugs on the deck.

10. The rapid installation system for the back-pulling steel wire rope of a fixed stern crane on a large floating crane vessel according to claim 1, characterized in that: The guide roller is located on one side of the ship's mooring winch.

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