Folding arm type marine A frame

Abstract

The utility model relates to the technical field of ships, in particular to a folding arm type marine frame A. The folding arm type marine frame A comprises a base, a variable-amplitude arm and a folding arm, the base is fixed to a ship deck, the first end of the variable-amplitude arm is hinged to the base, the variable-amplitude arm is controlled by a variable-amplitude drive to rotate relative to the base, and the second end of the variable-amplitude arm is hinged to the first end of the folding arm. A second end of the folding arm is provided with a mounting beam, the mounting beam is provided with a lifting point pulley and a swing stopping winch, the lifting point pulley is wound with a lifting rope used for hanging operation equipment, the variable-amplitude arm is provided with a swing stopping pulley, and a steel cable on the swing stopping winch is connected with the operation equipment after bypassing the swing stopping pulley. And the steel cable is kept tensioned and has constant tension. The folding arm type marine A frame has a folding function, the overall size in a storage state is reduced, the lifting point height is reduced, a lifting point pulley, a swing stopping winch and the like are convenient to maintain, and a more adaptive swing stopping device is arranged, so that operation equipment is protected from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of ships, in particular to a folding arm type ship A frame. Background Art

[0002] Among deck equipment, A-frame is a relatively special lifting machinery with the characteristics of large lifting capacity and wide adaptability. It is widely used in various oceanographic survey ships, scientific research ships and engineering ships.

[0003] In actual applications, the A-frame at the stern of a ship is often large in size due to its heavy load, occupying a considerable part of the deck space, thereby reducing the actual deck space. In addition, when the existing A-frame is in storage, the lifting point height is very high, which is not convenient for maintenance. Relatively speaking, the foldable A-frame has more advantages. In addition, ships are affected by waves in the marine environment, which will cause rolling and pitching, causing irregular swinging of the operating equipment during the process of releasing and recovering the equipment from the ship's deck. If there is no anti-sway device, the safety of the hoisting equipment cannot be effectively protected. However, the anti-sway device currently used in the A-frame cannot be used in the folding arm A-frame, so it needs to be improved. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a folding arm marine A-frame, which reduces the volume of the A-frame in the storage state and ensures that the operating equipment can be stably retracted and deployed during use.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A folding arm type marine A-frame, comprising a base, a luffing arm and a folding arm, wherein the base is fixed on the hull deck, the first end of the luffing arm is hinged to the base, and the luffing arm is controlled by the luffing drive to rotate relative to the base, the second end of the luffing arm is hinged to the first end of the folding arm, and the folding arm is controlled by the folding arm drive to rotate relative to the luffing arm, the second end of the folding arm is provided with a mounting beam, the mounting beam is provided with a suspension point pulley and an anti-sway winch, a suspension rope for suspending an operating equipment is wound around the suspension point pulley, the luffing arm is provided with an anti-sway pulley, a steel cable on the anti-sway winch is connected to the operating equipment after passing around the anti-sway pulley, and the steel cable is kept tensioned The folding arm type marine A-frame is tight and has constant tension. When the luffing drive and the folding arm drive are both at the minimum output stroke, the luffing arm and the folding arm are in an angled shape and are both located on the inside of the hull, and the folding arm type marine A-frame is in a storage state; when the luffing drive is at the minimum output stroke and the folding arm drive is at the maximum output stroke, the luffing arm and the folding arm combination are in a straight arm shape and are both located on the inside of the hull, and the folding arm type marine A-frame is in a hoisting state; when the luffing drive and the folding arm drive are both at the maximum output stroke, the luffing arm and the folding arm combination are in a straight arm shape and at least the second end of the folding arm is located on the outside of the hull, and the folding arm type marine A-frame is in a retractable and deployable operation state.

[0007] Optionally, a first hinge point and a second hinge point are provided on the base, the first hinge point is closer to the outside of the hull relative to the second hinge point, the luffing arm and the base are hinged at the first hinge point, a first mounting seat is provided on the luffing arm, a third hinge point and a fourth hinge point are provided on the first mounting seat, two ends of the luffing drive are respectively installed at the second hinge point and the third hinge point, a second mounting seat is provided on the folding arm, a fifth hinge point is provided on the second mounting seat, and two ends of the folding arm drive are respectively installed at the fourth hinge point and the fifth hinge point.

[0008] Optionally, an amplitude change limit block is provided on the base, and the amplitude change limit block is used to abut against the amplitude change arm when in the retracted and extended operation state.

[0009] Optionally, a folding arm limit block is provided on the second end of the luffing arm, and the folding arm limit block is used to abut against the folding arm in the hoisting state.

[0010] Optionally, the anti-swing pulley is located at the first end of the luffing arm, and the folding arm and the folding arm limit block are respectively provided with limit frames for limiting and guiding the steel cable between the anti-swing winch and the anti-swing pulley.

[0011] Optionally, the anti-swing pulley and the luffing arm are rotatably connected via a pin. In the storage state, the anti-swing pulley is in contact with the luffing arm, and a buffer block in contact with the anti-swing pulley is provided on the surface of the luffing arm. In the hoisting state or the retracted operation state, the anti-swing pulley rotates freely around the pin according to the suspension height of the operating equipment.

[0012] Optionally, two bases, two luffing arms and two folding arms are each provided and arranged in parallel, and the mounting beam is connected to the second ends of the two folding arms at the same time, so that the two luffing arms, the two folding arms and the mounting beam form a door shape in the hoisting state and the retracted and extended operation state.

[0013] Optionally, two anti-sway winches are provided corresponding to the two groups of bases, luffing arms and folding arms, and a plurality of suspension point pulleys are provided at intervals along the length direction of the mounting beam, and each suspension point pulley hangs freely under the action of gravity.

[0014] In summary, compared with the prior art, the folding-arm marine A-frame has a folding function, which reduces the overall size in the storage state, saves deck space, lowers the height of the hanging point, facilitates the maintenance of the hanging point pulley, anti-sway winch, etc., and has a more suitable anti-sway device, which makes the operating equipment more stable during the launching and launching process, thereby protecting the operating equipment from damage during the retrieval and release operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of the folding arm type marine A frame provided by an embodiment of the utility model in a storage state;

[0017] Figure 2 It is a side view of the folding arm marine A-frame provided by an embodiment of the utility model in a storage state;

[0018] Figure 3 It is a structural schematic diagram of the folding arm type marine A frame provided by an embodiment of the utility model in a hoisting state;

[0019] Figure 4 It is a side view of the folding arm type marine A frame provided by the embodiment of the utility model in the hoisting state;

[0020] Figure 5 It is a structural schematic diagram of the folding arm type marine A frame provided by an embodiment of the utility model in the retractable and deployable operation state;

[0021] Figure 6 It is a side view of the folding arm type marine A frame provided by the embodiment of the utility model in the retracted and deployed operation state;

[0022] Figure 7 It is a top view of the folding arm type marine A frame provided by the embodiment of the utility model in the retracted and deployed operation state;

[0023] Figure 8 The utility model is a schematic diagram of the action of the folding arm type marine A-frame anti-sway pulley provided in the embodiment of the utility model.

[0024] In the figure:

[0025] 1. Base; 2. Boom; 3. Folding arm; 4. Boom drive; 5. Folding arm drive; 6. Mounting beam; 7. Hanging point pulley; 8. Anti-sway winch; 9. Anti-sway pulley; 10. First hinge point; 11. Second hinge point; 12. First mounting seat; 13. Third hinge point; 14. Fourth hinge point; 15. Second mounting seat; 16. Fifth hinge point; 17. Boom limit block; 18. Folding arm limit block; 19. Limit frame; 20. Pin; 21. Operating equipment; 22. Buffer block. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 8 As shown, this preferred embodiment provides a folding arm type marine A-frame, comprising a base 1, a luffing arm 2 and a folding arm 3, wherein the base 1 is fixed on the hull deck, the first end of the luffing arm 2 is hinged to the base 1, and the luffing arm 2 is controlled by the luffing drive 4 to rotate relative to the base 1, the second end of the luffing arm 2 is hinged to the first end of the folding arm 3, and the folding arm drive 5 is controlled to rotate relative to the luffing arm 2, the second end of the folding arm 3 is provided with a mounting beam 6, the mounting beam 6 is provided with a suspension point pulley 7 and an anti-sway winch 8, the suspension point pulley 7 is wound with a suspension rope for suspending the operating equipment 21, the luffing arm 2 is provided with an anti-sway pulley 9, the steel cable on the anti-sway winch 8 is connected to the operating equipment 21 after passing the anti-sway pulley 9, and the steel cable is kept taut and the tension is constant. Specifically, the constant tension of the steel cable of the anti-sway winch 8 is achieved by the control valve group, thereby ensuring the smooth lifting of the operating equipment 21.

[0028] When the luffing drive 4 and the folding arm drive 5 are both at the minimum output stroke, the luffing arm 2 and the folding arm 3 are in an angled shape and are both located on the inner side of the hull, and the folding arm marine A-frame is in a storage state;

[0029] When the luffing drive 4 is at the minimum output stroke and the folding arm drive 5 is at the maximum output stroke, the luffing arm 2 and the folding arm 3 are combined into a straight arm shape and are both located on the inner side of the hull, and the folding arm marine A frame is in a hoisting state;

[0030] When the luffing drive 4 and the folding arm drive 5 are both at the maximum output stroke, the luffing arm 2 and the folding arm 3 are combined into a straight arm shape and at least the second end of the folding arm 3 is located outside the hull, and the folding arm type marine A frame is in the retractable operation state.

[0031] Therefore, the folding arm type marine A frame has a folding function, which reduces the overall size in the storage state, saves deck space, lowers the height of the hanging point, facilitates the maintenance of the hanging point pulley 7, the anti-sway winch 8, etc., and has a more suitable anti-sway device, so that the operating equipment 21 is more stable during the launching and launching process, thereby protecting the operating equipment 21 from damage during the retrieval operation.

[0032] As an optional scheme, a first hinge point 10 and a second hinge point 11 are provided on the base 1, and the first hinge point 10 is closer to the outside of the hull than the second hinge point 11. The luffing arm 2 is hinged to the base 1 at the first hinge point 10, and a first mounting seat 12 is provided on the luffing arm 2, and a third hinge point 13 and a fourth hinge point 14 are provided on the first mounting seat 12. Both ends of the luffing drive 4 are respectively installed at the second hinge point 11 and the third hinge point 13, and a second mounting seat 15 is provided on the folding arm 3. A fifth hinge point 16 is provided on the second mounting seat 15, and both ends of the folding arm drive 5 are respectively installed at the fourth hinge point 14 and the fifth hinge point 16, so as to realize the action of the luffing arm 2 and the folding arm 3 expanding toward the outside of the hull and folding toward the inside of the hull.

[0033] As an optional solution, a luffing limit block 17 is provided on the base 1. The luffing limit block 17 is used to abut against the luffing arm 2 in the retracting and extending operation state, so as to provide sufficient supporting force for the luffing arm 2.

[0034] As an optional solution, a folding arm limit block 18 is provided on the second end of the luffing arm 2, and the folding arm limit block 18 is used to abut against the folding arm 3 in the hoisting state, so as to provide the folding arm 3 with sufficient supporting force.

[0035] Furthermore, the anti-sway pulley 9 is located at the first end of the variable arm 2, and the folding arm 3 and the folding arm limit block 18 are respectively provided with a limit frame 19 for limiting and guiding the steel cable between the anti-sway winch 8 and the anti-sway pulley 9, so that the steel cable remains tensioned and stable, thereby achieving anti-sway of the operating equipment 21.

[0036] As an optional solution, the anti-sway pulley 9 is rotatably connected to the luffing arm 2 via a pin 20. In the storage state, the anti-sway pulley 9 is close to the luffing arm 2, and a buffer block 22 is provided on the surface of the luffing arm 2 to contact the anti-sway pulley 9; in the hoisting state or the retracting operation state, the anti-sway pulley 9 rotates freely around the pin 20 according to the suspension height of the operating equipment 21. Figure 8 When the anti-swing pulley 9 is not subjected to force, it contacts the buffer block 22 under the action of its own gravity; when the steel cable is subjected to force, the anti-swing pulley 9 rotates around the pin shaft 20 to adapt to the amplitude change, thereby ensuring that the anti-swing pulley 9 has sufficient flexibility to better guide the steel cable.

[0037] As an optional solution, two bases 1, two luffing arms 2, and two folding arms 3 are each provided and arranged in parallel, and the mounting beam 6 is connected to the second ends of the two folding arms 3 at the same time, so that the two luffing arms 2, the two folding arms 3 and the mounting beam 6 form a gate shape in the hoisting state and the retracted and extended operation state, thereby improving the overall structural strength.

[0038] Furthermore, two anti-sway winches 8 are provided corresponding to the two groups of bases 1, luffing arms 2 and folding arms 3, and multiple suspension point pulleys 7 are provided at intervals along the length direction of the mounting beam 6, and each suspension point pulley 7 hangs freely under the action of gravity.

[0039] It should be noted that the above-mentioned optional implementation modes can be combined in any combination, and the combined implementation modes all belong to the protection scope of the present utility model.

[0040] Specific action process:

[0041] See 1 and Figure 2 In the storage state, the luffing drive 4 is in the minimum output stroke, the luffing arm 2 is retracted to the inside of the hull, and the luffing arm 2 remains in a stable state; the folding arm drive 5 is in the minimum output stroke, and the folding arm 3 is folded downward; the steel cable on the anti-sway winch 8 passes through the limit frame 19 on the folding arm 3 and the luffing arm 2 in turn to the anti-sway pulley 9, and is fixed after bypassing the anti-sway pulley 9.

[0042] See 3 and Figure 4 In the hoisting state, the folding arm drive 5 is in the maximum output stroke, pushing the folding arm 3 upward so that the folding arm 3 and the variable arm 2 are combined into a straight arm shape, and the folding arm 3 is against the folding arm limit block 18; after the suspended working equipment 21 is in place, the steel cable of the anti-swing winch 8 is released, and the anti-swing winch 8 is operated to release the steel cable to connect the steel cable to the working equipment 21; the anti-swing pulley 9 automatically rotates to a certain angle according to the suspension position of the working equipment 21.

[0043] See Figures 5 to 7 When the operating equipment 21 is retracted or released, the luffing drive 4 is at the maximum output stroke, so that the luffing arm 2 rotates toward the outside of the hull around the first hinge point 10 of the base 1 until the luffing arm 2 abuts against the luffing limit block 17; during the luffing process, the anti-swing pulley 9 rotates around the pin shaft 20, the steel cable of the anti-swing winch 8 is in a tensioned state, and a control valve group is used to achieve constant tension; when the operating equipment 21 is retracted or released, the anti-swing pulley 9 rotates around the pin shaft 20.

[0044] It can be seen that the folding arm marine A frame has the following advantages:

[0045] 1) The folding arm structure of the marine A-frame has a smaller size when stored, saving deck space;

[0046] 2) In the storage state, the lifting point of the folding arm marine A frame is lower, which is convenient for maintenance of the lifting point pulley 7, the anti-sway winch 8, etc.;

[0047] 3) It has a more suitable anti-sway system, which can achieve better anti-sway of the operating equipment 21 during lifting and retracting operations, thereby ensuring the safety of the ship, equipment and personnel.

[0048] The above embodiments are only to illustrate the basic principles and characteristics of the utility model. The utility model is not limited by the above embodiments. Without departing from the spirit and scope of the utility model, the utility model has various changes and modifications, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A folding arm type marine A-frame, characterized in that: The invention comprises a base (1), a luffing arm (2) and a folding arm (3), wherein the base (1) is fixed on the hull deck, the first end of the luffing arm (2) is hinged to the base (1), and the luffing arm (2) is controlled by a luffing drive (4) to rotate relative to the base (1), the second end of the luffing arm (2) is hinged to the first end of the folding arm (3), and the folding arm drive (5) is controlled to rotate relative to the luffing arm (2), the second end of the folding arm (3) is provided with a mounting beam (6), the mounting beam (6) is provided with a suspension point pulley (7) and a sway-stopping winch (8), a suspension rope for suspending an operating device (21) is wound around the suspension point pulley (7), the luffing arm (2) is provided with a sway-stopping pulley (9), a steel cable on the sway-stopping winch (8) is connected to the operating device (21) after passing through the sway-stopping pulley (9), and the steel cable is kept taut and has a constant tension. When the luffing drive (4) and the folding arm drive (5) are both in the minimum output stroke, the luffing arm (2) and the folding arm (3) are in an angled shape and are both located on the inner side of the hull, and the folding arm type marine A-frame is in a storage state; When the luffing drive (4) is at the minimum output stroke and the folding arm drive (5) is at the maximum output stroke, the luffing arm (2) and the folding arm (3) are combined into a straight arm shape and are both located on the inner side of the hull, and the folding arm type marine A frame is in a hoisting state; When the variable-length drive (4) and the folding-arm drive (5) are both at their maximum output stroke, the variable-length arm (2) and the folding arm (3) are combined to form a straight arm and at least the second end of the folding arm (3) is located on the outer side of the hull, and the folding-arm marine A-frame is in a retractable and deployable operation state.

2. The folding arm type marine A frame according to claim 1, characterized in that: The base (1) is provided with a first hinge point (10) and a second hinge point (11), the first hinge point (10) being closer to the outer side of the hull relative to the second hinge point (11), the luffing arm (2) being hinged to the base (1) at the first hinge point (10), the luffing arm (2) being provided with a first mounting seat (12), the first mounting seat (12) being provided with a third hinge point (13) and a fourth hinge point (14), the two ends of the luffing drive (4) being respectively mounted at the second hinge point (11) and the third hinge point (13), the folding arm (3) being provided with a second mounting seat (15), the second mounting seat (15) being provided with a fifth hinge point (16), the two ends of the folding arm drive (5) being respectively mounted at the fourth hinge point (14) and the fifth hinge point (16).

3. The folding arm type marine A frame according to claim 1, characterized in that: The base (1) is provided with an amplitude change limit block (17), and the amplitude change limit block (17) is used to abut against the amplitude change arm (2) in the retracting and extending operation state.

4. The folding arm type marine A frame according to claim 1, characterized in that: A folding arm limit block (18) is provided on the second end of the luffing arm (2), and the folding arm limit block (18) is used to abut against the folding arm (3) in the hoisting state.

5. The folding arm type marine A frame according to claim 4, characterized in that: The anti-sway pulley (9) is located at the first end of the variable amplitude arm (2), and the folding arm (3) and the folding arm limit block (18) are respectively provided with a limit frame (19) for limiting and guiding the steel cable between the anti-sway winch (8) and the anti-sway pulley (9).

6. The folding arm type marine A frame according to claim 1, characterized in that: The anti-sway pulley (9) is rotatably connected to the luffing arm (2) via a pin shaft (20). In the storage state, the anti-sway pulley (9) is in contact with the luffing arm (2), and a buffer block (22) in contact with the anti-sway pulley (9) is provided on the surface of the luffing arm (2); In the hoisting state or the retracting and releasing operation state, the anti-sway pulley (9) rotates freely around the pin shaft (20) according to the suspension height of the operation equipment (21).

7. The folding arm type marine A frame according to claim 1, characterized in that: The base (1), the luffing arm (2), and the folding arm (3) are each provided with two and arranged in parallel, and the mounting beam (6) is simultaneously connected to the second ends of the two folding arms (3), so that the two luffing arms (2), the two folding arms (3) and the mounting beam (6) form a gate shape in the hoisting state and the retracting and extending operation state.

8. The folding arm type marine A frame according to claim 7, characterized in that: The anti-sway winches (8) are provided with two in total corresponding to the two groups of the bases (1), the variable-length arms (2) and the folding arms (3); a plurality of the suspension point pulleys (7) are provided at intervals along the length direction of the mounting beam (6), and each of the suspension point pulleys (7) hangs freely under the action of gravity.

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