A marine folding boom crane and its usage method

Abstract

The present invention discloses a ship-mounted folding arm crane and a method for using the same, and relates to the technical field of cranes. The ship-mounted folding arm crane comprises a split base 1, which is installed on a deck near the bow, and also comprises: a crane arm, which comprises a fixed arm fixed above the split base 1, a lifting arm rotatably installed on the upper end of the fixed arm, and a lifting arm rotatably installed on the other end of the lifting arm, and a hydraulic cylinder for pushing and pulling the lifting arm is provided on the split base 1; a cargo hook assembly, which is provided on the split base 1 and the crane arm; a split base 2, which is located on one side of the split base 1 near the center of the deck, and the ship-mounted folding arm crane and the method for using the same, wherein the force point of the lifting arm is located on the split base 2 when the lifting arm is lifted, and the force points of the cargo are dispersed on the split base 1 and the split base 2 when the arm driving part lifts the cargo, so as to prevent the crane arm from tipping over.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a ship-mounted folding arm crane and a use method thereof. Background Art

[0002] A marine crane is a machine used for lifting and loading and unloading cargo on marine transport vessels. A marine crane includes a base welded to the base of the ship deck and a column fixed on the base. The top of the column is hinged with a telescopic boom controlled by a cylinder, and a lifting winch is installed at the lower end of the telescopic boom.

[0003] For example, the marine folding arm crane with the publication number "Example" comprises a base 3, the upper part of the base 3 is connected to the tower body 1 through a slewing bearing 2, the tower body 1 is equipped with a slewing mechanism, the slewing mechanism is connected to a power source installed inside the tower body 1, the top of the tower body 1 is hinged with a basic arm 5, the head of the basic arm 5 is hinged with a folding arm 10; the bottom of the basic arm 5 is provided with a fixing block 7, one end of the fixing block 7 is installed with a folding arm oil cylinder 9 through a fastener, the piston rod head of the folding arm oil cylinder 9 is connected to the folding arm 10, and the other end of the fixing block 7 is connected with The piston rod of the luffing cylinder 6 is fixed to one side of the tower body 1 by fasteners. A lifting winch 4 for controlling the lifting of goods is installed on the upper part of the basic arm 5, and the lifting winch 4 is connected to the hook 8 at the head of the folding arm 10 by a wire rope. In actual use, the large-scale operation of the crane is achieved through the action of the luffing cylinder 6 and the folding arm cylinder 9, and it is retracted when not working, which is convenient to use and saves space. "This type of equipment is a more common folding arm crane, but the force degree of the hydraulic cylinder is limited, resulting in a decrease in the load capacity of the whole machine.

[0004] In particular, for example, the patent with application number CN201380037715.8 proposes a ship-mounted folding arm crane, which uses ropes to lift the telescopic arm, thereby greatly improving the load-bearing capacity of the crane.

[0005] However, since the ship crane is installed on the deck, and in order to facilitate fishermen to use lifting equipment to catch fishing nets, it is generally installed on the deck near the bow. A separate base is installed for the crane near the bow. In order to increase the cargo loading capacity of the deck, the crane is assembled above the base. It is best to set the base as small as possible, but the load-bearing capacity of a smaller base is reduced. The telescopic arm is extended and retracted using ropes to lift heavier cargo. If the side of a separate, smaller base close to the cargo bears too much weight, the crane base will fall off the deck and tip over, or the entire ship will tip over. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a ship-mounted folding arm crane and a method for using the same, which solves the problem in the prior art that a single, smaller base bears too much weight on one side close to the cargo, which may cause the crane base to detach from the deck and tip over or cause the entire ship to capsize.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a ship-borne folding arm crane, comprising a split base 1, the split base 1 is installed on the deck near the bow, and also comprises: a crane arm, the crane arm comprises a fixed arm fixed above the split base 1, a lifting arm rotatably installed on the upper end of the fixed arm, and a lifting arm rotatably installed on the other end of the lifting arm, the split base 1 is provided with a hydraulic cylinder for pushing and pulling the lifting arm; a cargo hook assembly, the cargo hook assembly is arranged on the split base 1 and the crane arm, and the cargo hook assembly is used to lift cargo; a split base 2, the split base 2 is located on one side of the split base 1 close to the center of the deck, and the split base 2 and the split base 1 are independent seats, and a small arm driving member for lifting the lifting arm is installed on the split base 2, so that the force point of the lifting arm is located on the split base 2 when the lifting arm is lifted, and the force point of the cargo when the small arm driving member lifts the cargo is dispersed on the lifting arm and the split base 2.

[0008] Furthermore, the split base 1 includes a fixed seat fixed on the deck, a rotating seat rotatably installed above the fixed seat on the deck, and an extension seat integrally formed on the side of the fixed seat close to the split base 2. A motor for driving the rotating seat to rotate is installed in the fixed seat, and the fixed arm is fixed on the rotating seat so that the crane arm rotates with the rotating seat.

[0009] Furthermore, the forearm driving component includes: a second bearing seat, the second bearing seat is fixed on a second split base, and an upper rope drum is rotatably installed in the second bearing seat, and an upper driving rope is fixed and wound on the upper rope drum; an upper rope guide wheel a, the upper rope guide wheel a is installed at one end of the lifting boom close to the lifting boom, the upper driving rope passes through the upper rope guide wheel a, and a protrusion is fixed on the end of the lifting boom away from the lifting boom, and the upper driving rope is guided by the upper rope guide wheel a and fixed on the protrusion; a forearm driving motor, the forearm driving motor is fixed on the second split base, and the forearm driving motor is used to drive the upper rope drum to rotate, so that the forearm driving component can reel in or unreel the upper driving rope.

[0010] Furthermore, it also includes a steering wheel assembly, which includes: a support tower, which is fixed above the extension seat; a mounting seat, which is fixed above the support tower, and a steering wheel body is provided in the mounting seat, and the steering wheel body is used to guide the upper drive rope so that a section of the upper drive rope close to the lifting arm can rotate along the split base with the crane arm; the steering wheel body includes a steering limiting wheel installed in the mounting seat in a vertical direction and a height maintaining wheel installed in the mounting seat in a horizontal direction, the height maintaining wheels are distributed on both sides of the steering limiting wheel, and the height maintaining wheel is used to make the upper drive rope entering and exiting the steering limiting wheel in a horizontal state; the height of the steering wheel body is greater than the height of the fixed arm, so that the lifting arm is in an extension process when the upper rope drum is wound.

[0011] Furthermore, the forearm driving component also includes: a lower rope drum, which is located below the upper rope drum and has a lower driving rope fixed on and wound around it, and the lower driving rope is fixed on the protrusion after passing through the steering wheel body, so that the lifting forearm is in a contraction process when the lower driving rope is reeled; a gear, which is fixed to one end of the upper rope drum and the lower rope drum, and the two gears are meshed to make the upper rope drum and the lower rope drum rotate in opposite directions relative to each other.

[0012] Furthermore, it also includes a cargo conveyor belt, which is arranged on both sides of the part between the split base 1 and the split base 2, so that the cargo conveyor belt can transport the lifted cargo to below the upper driving rope and the lower driving rope.

[0013] Further, the cargo hook assembly includes a lifting drum, a lifting guide wheel 1, a lifting guide wheel 2 and a lifting guide wheel 3, wherein: the lifting drum is installed above a rotating seat, the rotating seat is provided with a cargo lifting motor for driving the lifting drum to rotate, and a lifting rope is fixed and wound on the lifting drum; the lifting guide wheel 1 is arranged at the upper end of the fixed arm, the lifting guide wheel 2 is installed at the end of the lifting boom away from the fixed arm, and the lifting guide wheel 3 is installed at the end of the lifting arm away from the lifting boom, and the lifting rope passes through the lifting guide wheel 1, the lifting guide wheel 2 and the lifting guide wheel 3 in sequence and then is fixed with a hook.

[0014] Furthermore, the lifting guide wheel one, the lifting guide wheel two and the lifting guide wheel three are all provided with limit blocks for limiting the detachment of the lifting rope.

[0015] On the other hand, an embodiment of the present invention further provides a method for using a marine knuckle boom crane, comprising the following steps:

[0016] S1. Boom extension: The crane boom is extended by controlling the extension of the hydraulic cylinder, and the crane boom is extended by controlling the reeling of the upper drive rope and the unreeling of the lower drive rope in the boom drive member;

[0017] S2. Cargo lifting: The cargo hook assembly is unwound by controlling the lifting rope to allow the hook to enter the water area and hook the net, and then the lifting rope is rewound by controlling the lifting rope to allow the hook to lift the cargo;

[0018] S3. Handling: Control the crane arm to rotate along the split base to make the cargo reach the deck, and control the unwinding of the lifting rope in the cargo hook assembly to unload the cargo;

[0019] S4. Transport: The accumulated goods are transported to the bottom of the upper drive rope and the lower drive rope through the goods conveyor belt;

[0020] S5. Boom retraction: The lifting boom is shortened by controlling the shortening of the hydraulic cylinder, and the lifting boom is retracted by controlling the unwinding of the upper drive rope and the rewinding of the lower drive rope in the boom drive component.

[0021] Furthermore, during the processes of S2 and S3, the stress points of the fixed arm and the lifting arm are located on the split base one, the stress points of the lifting arm are located on the split base two, and the stress points of the cargo are dispersed to the split base two and the lifting arm.

[0022] The present invention has the following beneficial effects:

[0023] (1) The ship-mounted folding arm crane and its use method, when the lifting arm is lifted, the force point is located on the split base 2, and when the arm driving part lifts the cargo, the force points of the cargo are dispersed on the split base 1 and the split base 2. Since the split base 1 and the split base 2 are split structures and have no mechanical connection, the split base 2 can greatly reduce the bearing capacity of the split base 1, and can greatly improve the lifting stability, and avoid the crane arm from being separated from the split base 1 and tipping over. In addition, since the split base 2 is far away from the bow position of the deck, the area of ​​the two bases extending longitudinally across the deck is larger, so it can also avoid the bow of the ship being overloaded and tipping over;

[0024] (2) Although the ship-mounted folding arm crane and its use method are provided with a split base 2 at a distance from the split base 1, the space between the two is an empty area, so the space between the two can accommodate other accessories of the ship or cargo, that is, the space between the two is in a usable state, so that although the present invention is provided with two bases, it does not occupy too much space on the deck;

[0025] (3) The ship folding arm crane and its use method, the lifting of the lifting arm relies on the upper drive rope, so compared with the hydraulic cylinder in the prior art, the lifting weight can be increased;

[0026] (4) The ship-mounted folding arm crane and the method for using the same are provided with a lower driving rope. When the lower driving rope pulls the jib, the jib can be retracted. Thus, the ship-mounted folding arm crane provided by the embodiment of the present invention can maximize the degree of retraction of the jib, thereby reducing the volume of the equipment when not in use, thereby reducing the windward area of ​​the ship and improving the stability of the ship.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the present invention installed on a deck;

[0029] Figure 2 It is a schematic diagram of the present invention without installing a cargo conveyor belt;

[0030] Figure 3 It is a front view of the crane boom and the jib of the present invention in a partially unfolded state;

[0031] Figure 4 This is a fully unfolded view of the lifting boom and the lifting jib of the present invention

[0032] Figure 5 A first perspective view of the forearm driving member of the present invention;

[0033] Figure 6 A second viewing angle diagram of the forearm driving member of the present invention;

[0034] Figure 7 For the present invention Figure 3 Rear view of

[0035] Figure 8 For the present invention Figure 7 A magnified image of area A;

[0036] Fig. 9 It is a schematic diagram of the internal structure of the mounting base of the present invention;

[0037] Fig.10 It is a schematic diagram of the crane jib of the present invention being in a vertical state;

[0038] Fig.11 It is a schematic diagram of the lifting boom and the jib of the present invention being fully retracted;

[0039] Fig.12 It is a schematic diagram of the fully retracted jib of the present invention;

[0040] Fig.13 It is an exploded view of the lifting boom and the lifting jib of the present invention;

[0041] Fig.14It is a schematic diagram of the lifting guide wheel three of the present invention.

[0042] In the figure, 100, split base 2; 200, forearm driving member; 210, bearing seat 2; 220, upper rope drum; 221, upper driving rope; 221a, upper rope guide wheel; 230, lower rope drum; 231, lower driving rope; 240, gear; 250, forearm driving motor; 300, split base 1; 310, fixed seat; 320, extension seat; 330, rotating seat; 400, cargo hook assembly; 410, cargo lifting motor; 420, lifting drum; 430, lifting rope; 440, lifting guide wheel two; 450, lifting guide wheel one; 460, lifting guide wheel three; 470, hook; 500, steering wheel assembly; 510, steering wheel body; 511, height maintenance wheel; 512, steering limit wheel; 520, mounting seat; 530, support tower; 600, cargo conveyor belt; 700, crane arm; 710, fixed arm; 720, lifting boom; 730, lifting jib; 731, bump; 740, hydraulic cylinder. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0045] Refer to the following Figure 1 - Fig.14 The invention describes a ship-mounted folding arm crane and a method of using the same provided in an embodiment of the invention.

[0046] See also Figure 1 and Figure 2As shown, on the one hand, an embodiment of the present invention provides a ship-mounted folding arm crane, including a split base 300, the split base 300 is installed at a position on the deck near the bow, and also includes a crane arm 700 arranged above the split base 300, the crane arm 700 includes a fixed arm 710 fixed above the split base 300, a lifting arm 720 rotatably installed on the upper end of the fixed arm 710, and a lifting arm 730 rotatably installed at the other end of the lifting arm 720, and a hydraulic cylinder 740 for pushing and pulling the lifting arm 720 is provided on the split base 300; when the hydraulic cylinder 740 is extended, the lifting arm 720 can be pushed, so that the lifting arm 720 is in an extended state (such as Figure 3 to Figure 4 status).

[0047] Preferably, a corresponding limiting structure should be provided at the relative rotation position of the lifting jib 730 and the lifting arm 720 to limit the reverse rotation caused by excessive lifting of the lifting jib 730. For example, a pin is fixed on the lifting jib 730, and the pin is inserted into the pin hole of the lifting arm 720. A limiting protrusion is fixed on the pin, and a limiting protrusion is also provided on the outer surface area of ​​the lifting arm 720 near the pin hole. When the two limiting protrusions are in contact, the position of limiting the continuous rotation of the lifting jib 730 is reached, so as to avoid the lifting jib 730 from rotating in the opposite direction. Figure 3 In the state shown, the lifting arm 730 is disengaged due to excessive counterclockwise rotation.

[0048] A cargo hook assembly 400 is also provided, and the cargo hook assembly 400 is provided on the split base 300 and the crane arm 700, and when the cargo hook assembly 400 is working, it can lift cargo.

[0049] Continue to refer to Figure 1 and Figure 2 As shown, in order to improve the carrying capacity of the lifting arm 730 while reducing the force on the split base 1 300, ensure stability during lifting, and prevent the crane arm 700 from separating from the split base 1 300 and tipping over, a split base 2 100 is also provided. The split base 2 100 is located on the side of the split base 1 300 close to the center of the deck, and the split base 2 100 and the split base 1 300 are independent bases of their own. An arm driving component 200 for lifting the lifting arm 730 is installed on the split base 2 100, so that the force point when the lifting arm 730 is lifted is located on the split base 2 100, and when the arm driving component 200 lifts the cargo, the force points of the cargo are dispersed on the lifting arm 730 and the split base 2 100, and the force dispersed on the lifting arm 730 by the cargo is actually subjected to the force point on the split base 1 300.

[0050] Therefore, in the marine folding arm crane provided by the embodiment of the present invention, the force point of the lifting arm 730 is located on the split base 100 when it is lifted, and the force point of the cargo is dispersed on the split base 1 300 and the split base 2 100 when the arm driving component 200 lifts the cargo. Since the split base 1 300 and the split base 2 100 are split structures and have no mechanical connection, the split base 2 100 can greatly reduce the bearing capacity of the split base 1 300, greatly improve the lifting stability, and avoid the crane arm 700 from being separated from the split base 1 300 and causing tipping.

[0051] Furthermore, since there is no mechanical connection between the two, although the split base 2 100 is added at a distant position of the split base 1 300, the space between the two is an empty area, so the remaining accessories of the ship or the cargo can be accommodated therebetween, that is, the space between the two is in a usable state, so that although the present invention sets two bases at a relatively long distance, it does not occupy too much space on the deck.

[0052] Furthermore, both bases can be set smaller, that is, the total volume of the two bases can be equal to the volume of one base in the prior art, so that the deck area occupied by the two bases is basically the same, but because the two bases extend across a larger range of the deck, the load-bearing capacity can be greatly improved.

[0053] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the split base 1 300 mentioned above includes a fixed seat 310 fixed on the deck, a rotating seat 330 rotatably installed above the deck fixed seat 310, and an extension seat 320 integrally formed on the fixed seat 310 near the side of the split base 2 100. A motor for driving the rotating seat 330 to rotate is installed in the fixed seat 310, and a fixed arm 710 is fixed on the rotating seat 330, so that when the motor drives the rotating seat 330 to rotate, the fixed arm 710 thereon can rotate with it, so that the entire crane arm 700 rotates with the rotating seat 330, so that the lifting arm 730 can reach all directions of the split base 1 300 to realize loading and unloading of materials in all directions.

[0054] Combination Figure 1 , Figure 5 and Figure 6As shown, the forearm driving member 200 mentioned above includes a bearing seat 210, the bearing seat 210 is fixed on the split base 100, and an upper rope drum 220 is rotatably installed in the bearing seat 210, an upper driving rope 221 is fixed and wound on the upper rope drum 220, and the upper rope drum 220 can reel in or unreel the upper driving rope 221; an upper rope guide wheel 221a is also provided, and the upper rope guide wheel 221a is installed on the lifting boom 720 near the lifting forearm 730 The upper driving rope 221 passes through the upper rope guide wheel 221a, and a protrusion 731 is fixedly arranged at one end of the jib 730 away from the jib 720. The upper driving rope 221 is guided by the upper rope guide wheel 221a and is fixed on the protrusion 731. When the upper rope drum 220 reels the upper driving rope 221, the upper driving rope 221 slides on the upper rope guide wheel 221a, and the jib 730 can be pulled by the protrusion 731 to lift the jib 730. Figure 3 - Figure 4 The middle is a schematic diagram of the lifting arm 730 being gradually raised.

[0055] In order to realize the winding or unwinding of the upper rope drum 220, a small arm driving motor 250 is also provided. The small arm driving motor 250 is fixed on the split base 100, and the small arm driving motor 250 is used to drive the upper rope drum 220 to rotate so that the small arm driving member 200 can wind up or unwind the upper driving rope 221.

[0056] Combination Figure 7 - Fig. 9 As shown, in order to further ensure that the upper rope drum 220 can be raised when the upper driving rope 221 is wound, and to raise the upper rope drum 220 between the split base 1 300 and the split base 2 100 (to reserve enough height above the deck to accommodate the cargo), a steering wheel assembly 500 is also provided, and the steering wheel assembly 500 includes a support tower 530 and a mounting seat 520, the support tower 530 is fixed above the extension seat 320, the mounting seat 520 is fixed above the support tower 530, and a steering wheel is provided in the mounting seat 520. The wheel body 510, the steering wheel body 510 is used to guide the upper drive rope 221, and the height of the steering wheel body 510 is greater than the height of the fixed arm 710. Such a setting can ensure that the lifting arm 730 is in the extension process when the upper rope drum 220 is wound; on the other hand, it can make the section of the upper drive rope 221 close to the lifting arm 730 able to rotate along the split base 300 with the crane arm 700 (that is, if the steering wheel assembly 500 is not set, the upper drive rope 221 will be unstable when the lifting arm 730 rotates with the rotating seat 330).

[0057] Preferably, the steering wheel body 510 includes a steering limiting wheel 512 rotatably installed in the mounting seat 520 along the vertical direction and a height maintaining wheel 511 rotatably installed in the mounting seat 520 along the horizontal direction. The height maintaining wheels 511 are distributed on both sides of the steering limiting wheel 512 (the two sides mentioned here refer to the two sides of the steering limiting wheel 512 close to the split base 1 300 and the split base 2 100). The height maintaining wheel 511 is used to make the upper driving rope 221 entering and exiting the steering limiting wheel 512 in a horizontal state, thereby ensuring that the upper driving rope 221 on the steering limiting wheel 512 remains stable. When the lifting arm 730 rotates with the rotating seat 330, it is limited by the height maintaining wheel 511 and the steering limiting wheel 512, and the upper driving rope 221 can maintain a stable position and can also avoid falling off from its guide wheel.

[0058] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in fact, the upper drive rope 221 is unwound to Fig.10 730 is in a state where the jib 730 is perpendicular to the deck due to its own weight. Even if the upper drive rope 221 is continuously unwound, the jib 730 will not continue to retract. That is, the maximum threshold value of the retraction of the jib 730 that can be controlled by the upper drive rope 221 is the vertical state. This results in a larger volume of the entire crane in the retracted state. Therefore, the following scheme is given: the jib driving member 200 also includes a lower rope drum 230, which is located below the upper rope drum 220, and a lower drive rope 231 is fixed and wound on the lower rope drum 230. The lower drive rope 231 passes through the steering wheel body 510 and is fixed on the protrusion 731. Therefore, the jib 730 can be in a retraction process when the lower drive rope 231 is retracted. That is, after the jib 730 is retracted to the vertical state, the continuously retracted lower drive rope 231 can pull the jib 730 through the protrusion 731 to achieve further retraction of the jib 730, forming Figure 8 The status shown ( Fig.10 - Fig.11 In the process, in addition to the further contraction of the lifting arm 730, the lifting arm 720 also contracts as the hydraulic cylinder 740 shortens.

[0059] Preferably, the lower driving rope 231 also passes through the steering wheel body 510 and is guided and limited by the steering wheel body 510, so as to maintain the height and stability of the lower driving rope 231.

[0060] Therefore, the ship-mounted folding arm crane provided in the embodiment of the present invention can maximize the degree of retraction of the lifting boom 720 and the lifting jib 730, thereby reducing the volume of the equipment when not in use, thereby reducing the wind-exposed area of ​​the ship and improving the stability of the ship.

[0061] Preferably, a gear 240 is installed at one end of the upper rope drum 220 and the lower rope drum 230, and the two gears 240 are meshed to make the upper rope drum 220 and the lower rope drum 230 rotate in opposite directions relative to each other, that is, when the upper rope drum 220 reels the upper driving rope 221, the lower rope drum 230 unwinds the lower driving rope 231, and the lifting arm 730 is in an extended state. Conversely, when the upper rope drum 220 unwinds the upper driving rope 221, the lower rope drum 230 rewinds the lower driving rope 231, and the lifting arm 730 is in a retracted state.

[0062] like Fig.12 The state shown is that the lifting boom 720 is extended, but the lifting jib 730 is retracted.

[0063] like Figure 1 It should be noted that, due to the setting of the steering wheel assembly 500, the crane arm 700 cannot rotate to the position between the split base 1 300 and the split base 2 100, resulting in the position between the split base 1 300 and the split base 2 100 being unable to accommodate the lifted cargo, so a cargo conveyor belt 600 is set here, and the cargo conveyor belt 600 is set on both sides of the part between the split base 1 300 and the split base 2 100, so that the cargo conveyor belt 600 transports the lifted cargo to below the upper driving rope 221 and the lower driving rope 231, so as to avoid wasting space between the split base 1 300 and the split base 2 100.

[0064] In addition, if Figure 1 , Figure 2 and Fig.13 As shown, the cargo hook assembly 400 mentioned above includes a lifting drum 420, a lifting guide wheel 1 450, a lifting guide wheel 2 440 and a lifting guide wheel 3 460, wherein the lifting drum 420 is installed above a rotating seat 330, and the rotating seat 330 is provided with a cargo lifting motor 410 for driving the lifting drum 420 to rotate, and a lifting rope 430 is fixed and wound on the lifting drum 420, and when the cargo lifting motor 410 is working, it can drive the lifting drum 420 to rotate, and it can reel in or unreel the lifting rope 430.

[0065] The above-mentioned lifting guide wheel 1 450 is arranged at the upper end of the fixed arm 710, the lifting guide wheel 2 440 is installed at the end of the lifting boom 720 away from the fixed arm 710, and the lifting guide wheel 3 460 is installed at the end of the lifting arm 730 away from the lifting boom 720. The lifting rope 430 passes through the lifting guide wheel 1 450, the lifting guide wheel 2 440 and the lifting guide wheel 3 460 in sequence and is fixed with a hook 470.

[0066] In this embodiment, when the lifting drum 420 is reeled in, the lifting rope 430 can pull the hook 470 so that the hook 470 can lift the goods, and in this process the lifting rope 430 can be guided on the lifting guide wheel 1 450, the lifting guide wheel 2 440 and the lifting guide wheel 3 460 to ensure the stability of the lifting rope 430.

[0067] Preferably, Fig.14 As shown, the lifting guide wheel 1 450 , the lifting guide wheel 2 440 and the lifting guide wheel 3 460 are all provided with limit blocks for limiting the detachment of the lifting rope 430 .

[0068] When in use (working), the lifting boom 720 is unfolded by driving and controlling the extension of the hydraulic cylinder 740, and the upper driving rope 221 is reeled in and the lower driving rope 231 is unreeled by controlling the arm driving motor 250 to work. When the upper driving rope 221 is reeled in, the lifting boom 730 can be lifted. After the lifting boom 730 is extended to a suitable position, the cargo lifting motor 410 can be controlled to work, so that the lifting rope 430 is unreeled, and the hook 470 hooks the fishing net. The cargo lifting motor 410 is controlled to work again to reel in the lifting rope 430, so that the hook 470 lifts the cargo upwards. As the rotating seat 330 rotates, the hook 470 can transfer the cargo to the deck, and then the next lifting operation can be carried out.

[0069] On the other hand, an embodiment of the present invention further provides a method for using a ship-mounted knuckle boom crane, comprising the following steps:

[0070] S1. Boom extension: The lifting boom 720 is unfolded by controlling the extension of the hydraulic cylinder 740, and the lifting boom 730 is unfolded by controlling the upper drive rope 221 in the arm drive member 200 to reel in and the lower drive rope 231 to unwind;

[0071] S2. Cargo lifting: By controlling the unwinding of the lifting rope 430 in the cargo hook assembly 400, the hook 470 enters the water area and hooks the net, and then rewinding the lifting rope 430 in the cargo hook assembly 400 to lift the cargo by the hook 470;

[0072] S3 handling: by controlling the crane arm 700 along the split base a 300 rotation, so that the cargo reaches the deck, and control the cargo hook assembly 400 within the lifting rope 430 unwinding to unload the cargo;

[0073] S4. Transport: The accumulated goods are transported to the lower portion of the upper drive rope 221 and the lower drive rope 231 through the cargo conveyor belt 600;

[0074] S5. Boom retraction: The lifting boom 720 is shortened by controlling the hydraulic cylinder 740 to shorten, and the lifting boom 730 is retracted by controlling the upper drive rope 221 in the arm driving member 200 to unwind and the lower drive rope 231 to rewind.

[0075] Specifically, during the processes of S2 and S3, the stress points of the fixed arm 710 and the lifting arm 720 are located on the split base 1 300 , the stress point of the lifting arm 730 is located on the split base 2 100 , and the stress points of the cargo are dispersed to the split base 2 100 and the lifting arm 730 .

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0077] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A ship-mounted folding arm crane, comprising a split base (300), wherein the split base (300) is installed on a deck near the bow, and is characterized in that: Also includes: A crane arm (700), the crane arm (700) comprising a fixed arm (710) fixed above the split base (300), a lifting arm (720) rotatably mounted on the upper end of the fixed arm (710), and a lifting jib (730) rotatably mounted on the other end of the lifting arm (720), and a hydraulic cylinder (740) for pushing and pulling the lifting arm (720) is provided on the split base (300); A cargo hook assembly (400), wherein the cargo hook assembly (400) is arranged on the split base 1 (300) and the crane arm (700), and the cargo hook assembly (400) is used to lift cargo; A split base 2 (100), wherein the split base 2 (100) is located on a side of the split base 1 (300) close to the center of the deck, and the split base 2 (100) and the split base 1 (300) are independent bases, and a jib driving component (200) for lifting the jib (730) is installed on the split base 2 (100), so that when the jib (730) is lifted, the force point is located on the split base 2 (100), and when the jib driving component (200) lifts the cargo, the force point of the cargo is dispersed on the jib (730) and the split base 2 (100); The split base 1 (300) comprises a fixed seat (310) fixed on the deck, a rotating seat (330) rotatably mounted above the fixed seat (310) on the deck, and an extension seat (320) integrally formed on a side of the fixed seat (310) close to the split base 2 (100); a motor for driving the rotating seat (330) to rotate is installed in the fixed seat (310); the fixed arm (710) is fixed on the rotating seat (330) so that the crane arm (700) rotates with the rotating seat (330); The small arm driving component (200) comprises: A second bearing seat (210), wherein the second bearing seat (210) is fixed on the second split base (100), and an upper rope drum (220) is rotatably mounted in the second bearing seat (210), and an upper driving rope (221) is fixed on and wound around the upper rope drum (220); An upper rope guide wheel (221a), the upper rope guide wheel (221a) being mounted on one end of the lifting boom (720) close to the lifting jib (730), the upper driving rope (221) passing through the upper rope guide wheel (221a), one end of the lifting jib (730) away from the lifting boom (720) being fixed with a protrusion (731), the upper driving rope (221) being fixed on the protrusion (731) after being guided by the upper rope guide wheel (221a); a forearm drive motor (250), the forearm drive motor (250) being fixedly mounted on the second split base (100), and the forearm drive motor (250) being used to drive the upper rope drum (220) to rotate, so that the forearm drive member (200) can reel in or unreel the upper drive rope (221); Also included is a steering wheel assembly (500), the steering wheel assembly (500) comprising: A support tower (530), wherein the support tower (530) is fixed above the extension seat (320); a mounting seat (520), the mounting seat (520) being fixed above the supporting tower (530), and a steering wheel body (510) being provided in the mounting seat (520), the steering wheel body (510) being used to guide the upper driving rope (221), so that a section of the upper driving rope (221) close to the lifting jib (730) can rotate along the split base (300) with the crane arm (700); the steering wheel body (510) comprising a steering limiting wheel (512) rotatably mounted in the mounting seat (520) in a vertical direction, and a height maintaining wheel (511) rotatably mounted in the mounting seat (520) in a horizontal direction, the height maintaining wheels (511) being distributed on both sides of the steering limiting wheel (512), and the height maintaining wheels (511) being used to make the upper driving rope (221) entering and exiting the steering limiting wheel (512) in a horizontal state; The height of the steering wheel body (510) is greater than the height of the fixed arm (710), so that the lifting arm (730) is in the process of extending when the upper rope drum (220) is reeled in.

2. A marine folding arm crane according to claim 1, characterized in that: The small arm driving component (200) further comprises: a lower rope drum (230), the lower rope drum (230) being located below the upper rope drum (220), and having a lower driving rope (231) fixed to and wound around the lower rope drum (230), the lower driving rope (231) being fixed to the protrusion (731) after passing through the steering wheel body (510), so that the lifting arm (730) is in a contraction process when the lower driving rope (231) is retracted; A gear (240) is fixed to one end of the upper rope drum (220) and the lower rope drum (230), and the two gears (240) are meshed to make the upper rope drum (220) and the lower rope drum (230) rotate in opposite directions relative to each other.

3. A ship-mounted folding arm crane according to claim 2, characterized in that: It also includes a cargo conveyor belt (600), which is arranged on both sides of the portion between the split base 1 (300) and the split base 2 (100), so that the cargo conveyor belt (600) can transport the lifted cargo to below the upper driving rope (221) and the lower driving rope (231).

4. A ship-mounted folding arm crane according to claim 3, characterized in that: The cargo hook assembly (400) comprises a lifting drum (420), a lifting guide wheel 1 (450), a lifting guide wheel 2 (440) and a lifting guide wheel 3 (460), wherein: The lifting drum (420) is installed above the rotating seat (330); a cargo lifting motor (410) for driving the lifting drum (420) to rotate is provided on the rotating seat (330); a lifting rope (430) is fixed to and wound around the lifting drum (420); The lifting guide wheel one (450) is arranged at the upper end of the fixed arm (710), the lifting guide wheel two (440) is installed at one end of the lifting boom (720) away from the fixed arm (710), and the lifting guide wheel three (460) is installed at one end of the lifting arm (730) away from the lifting boom (720). The lifting rope (430) passes through the lifting guide wheel one (450), the lifting guide wheel two (440) and the lifting guide wheel three (460) in sequence and is then fixed with a hook (470).

5. A ship-mounted folding arm crane according to claim 4, characterized in that: The lifting guide wheel one (450), the lifting guide wheel two (440) and the lifting guide wheel three (460) are all provided with limit blocks for limiting the detachment of the lifting rope (430).

6. A method for using the marine knuckle boom crane according to any one of claims 1 to 5, characterized in that: The steps include: S1. Boom extension: The lifting boom (720) is extended by controlling the hydraulic cylinder (740) to extend, and the lifting boom (730) is extended by controlling the upper drive rope (221) in the arm driving member (200) to reel in and the lower drive rope (231) to unreel; S2. Cargo lifting: The lifting rope (430) in the cargo hook assembly (400) is unwound to allow the hook (470) to enter the water area and hook the net, and then the lifting rope (430) in the cargo hook assembly (400) is rewound to allow the hook (470) to lift the cargo; S3. Handling: By controlling the crane arm (700) to rotate along the split base (300), the cargo reaches the deck, and the lifting rope (430) in the cargo hook assembly (400) is controlled to unwind to unload the cargo; S4. Transporting: transporting the accumulated cargo to below the upper drive rope (221) and the lower drive rope (231) through the cargo conveyor belt (600); S5. Boom retraction: The lifting boom (720) is shortened by controlling the hydraulic cylinder (740) to shorten, and the lifting boom (730) is retracted by controlling the upper drive rope (221) in the arm driving member (200) to unwind and the lower drive rope (231) to rewind.

7. A method for using a marine knuckle boom crane according to claim 6, characterized in that: During the processes of S2 and S3, the stress points of the fixed arm (710) and the lifting arm (720) are located on the split base one (300), the stress point of the lifting arm (730) is located on the split base two (100), and the stress points of the cargo are distributed to the split base two (100) and the lifting arm (730).

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