A large-tonnage container hoisting crane and a hoisting method thereof

Abstract

The present application relates to the crane technical field, especially a kind of large-tonnage container hoisting crane and hoisting method thereof, including travelling crane and be used for hoisting square box hoist, travelling crane is provided with: right-angle load-bearing support is fixedly set on travelling crane;First traction mechanism is set on travelling crane by right-angle load-bearing support, and first traction mechanism is used for power-saving type traction hoist vertical lifting;Second traction mechanism is set on travelling crane by right-angle load-bearing support.The present application is set on the travelling crane with main gantry as main body two opening and closing swing arms, and first traction rope with component force is connected between three, wherein leveling tool is stretched by reciprocating chain and anti-unhooking head cable for directly pulling load flat and is controlled, locking tool is fixed by hoisting pull rod in plastic opening and closing plate group to adjust and maintain the horizontal state of load flat hoisting square box.

Description

Large-tonnage container hoisting crane and hoisting method thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to a large-tonnage container hoisting crane and a hoisting method thereof. BACKGROUND

[0002] The crane is generally used for hoisting containers, but the containers are prone to shaking and other unstable conditions during hoisting, which may cause certain safety hazards to the crane and the operator.

[0003] The large-tonnage container is usually hoisted by a rail-mounted container crane hoisting clamp as claimed in application No. CN202410430442.3, which considers that the extrusion force between the clamping wall and the outer wall of the container may be too large, causing damage to the outer wall of the container and the goods inside, and the container may shake during transportation, so it is proposed to lock the clamping piece synchronously when clamping to avoid the container from shaking during transfer, but the clamping of the container by the clamping frame is unidirectional, and can only achieve horizontal clamping in the left-right or front-back direction. However, during hoisting, the container and the clamping piece are prone to slipping accidents due to the influence of vibration and gravity, although the locking of the clamping piece is achieved, the flexible connection between the crane and the load-bearing shell in the lifting device still exists imbalance problem under the combined influence of uneven distribution of internal weight of the container and inertia during hoisting, and the single lifting structure is difficult to balance and adjust, which may cause serious imbalance of the container.

[0004] Like the container crane as claimed in application No. CN201380032493.0, it proposes to accurately detect obstacles in a wide range and can inhibit the increase in cost caused by the increase in the number of components or the complication of the control system, but the gantry structure used in a one-sided manner poses a great threat to the balance of hoisting large-tonnage containers, and the range of hoisting movement is extremely limited. More importantly, the winch device used to pull the container has not been designed in a labor-saving manner, and the container is hoisted completely relying on the strong power output, which directly hoists the large-tonnage container, and has a great load pressure on the crane, which also causes great inconvenience to the transfer, seriously affecting the implementation efficiency, level and safety of the hoisting operation. SUMMARY

[0005] The purpose of the present application is to solve the problem of the crane in the prior art that it is difficult to hoist large-tonnage containers smoothly and labor-savingly, and to propose a large-tonnage container hoisting crane and a hoisting method thereof.

[0006] In order to achieve the above object, the present application adopts the following technical solutions:

[0007] A large-tonnage container hoisting crane, comprising a trolley and a hoist for hoisting a square box, the trolley is provided with:

[0008] A right-angle load-bearing support is fixedly arranged on the trolley;

[0009] A first traction mechanism is arranged on the trolley through the right-angle load-bearing support, and the first traction mechanism is used for power-saving traction of the hoist for vertical lifting;

[0010] A second traction mechanism is arranged on the trolley through the right-angle load-bearing support, and the second traction mechanism is used for power-saving traction of the first traction mechanism;

[0011] A balance maintaining mechanism is arranged between the hoist and the first traction mechanism, and the balance maintaining mechanism is used for adjusting and maintaining the hoist to a balanced state with the first traction mechanism as the fulcrum.

[0012] Preferably, the trolley comprises a main gantry extending leftward and rightward, two right-angle opening and closing struts extending along the front and back directions to form a sub-gantry are movably arranged on the main gantry, and the main gantry and the lower ends of the right-angle opening and closing struts are both provided with locking universal wheels.

[0013] Preferably, the hoist comprises a load-bearing flat plate, and a fixing clamp for clamping and supporting the square box upward from the front and back and left and right directions is movably arranged in the load-bearing flat plate.

[0014] Preferably, the right-angle load-bearing support is integrally connected to the main gantry.

[0015] Preferably, the first traction mechanism comprises a lifting movable pulley, a first traction roller is arranged on the right-angle load-bearing support, and a first traction rope for power-saving traction of the hoist for vertical lifting is connected between the lifting movable pulley and the first traction roller.

[0016] Preferably, the lifting movable pulley is located directly above the load-bearing flat plate.

[0017] Preferably, the second traction mechanism comprises a moving movable pulley movably arranged on the right-angle load-bearing support, the main gantry is provided with a second traction roller, and a second traction rope for power-saving traction of the first traction roller for rotation is connected between the moving movable pulley and the second traction roller.

[0018] Preferably, the balance maintaining mechanism comprises four sets of leveling tools for traction of the load-bearing flat plate to a horizontal state, and two sets of locking tools for fixing the load-bearing flat plate in the horizontal state are arranged between the lifting movable pulley and the load-bearing flat plate.

[0019] Preferably, the four sets of leveling tools are radially distributed, and two sets of locking tools are symmetrically distributed left and right.

[0020] Regarding the hoisting method of the large-tonnage container hoisting crane, the hoisting method comprises the following steps:

[0021] Step S1, fixing the square box through the fixing clamp;

[0022] Step S2, control the rotation of the second traction roller to make the first traction roller rotate, and the square box is lifted to a height position of 0.5m from the ground;

[0023] Step S3, adjust the load plate to a horizontal state through the leveling tool, and then fix the horizontal state through the locking tool;

[0024] Step S4, control the rotation of the second traction roller to make the first traction roller rotate, and adjust the lifting of the square box through the hoist;

[0025] Step S5, control the two right-angle expansion struts to expand along the front and rear direction, assist the main gantry to move the crane, and adjust the displacement of the hoisted square box.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1. The present application sets two expansion arms on the crane with the main gantry as the main body, and uses the meshing transmission between the driving worm and the driven worm to realize the deflection adjustment of the right-angle expansion strut, so that the crane can move symmetrically in front and back and left and right, and can provide balance and stability for the hoisting operation of the moving square box.

[0028] 2. The present application uses the load plate to set the hoist, wherein four radially distributed fixing clamps are set, the fixing clamps are driven by the transmission block and the guide wedge table, so that the inclined telescopic lifting fixing clamps firmly clamp and fix the square box.

[0029] 3. The present application sets a first traction mechanism composed of a first fixed pulley, a first traction roller and a lifting movable pulley on the crane, and connects a first traction rope with a component force between the three, so as to traction the hoist in a labor-saving manner through the traction connection between the lifting movable pulley and the load plate.

[0030] 4. The present application sets a second traction mechanism composed of a driving gear, a driven gear, an elastic limiting piece, a moving movable pulley, a second fixed pulley and a second traction roller on the crane, and sets a second traction rope with a component force between the moving movable pulley, the second fixed pulley and the second traction roller, so as to drive the first traction roller to rotate in a labor-saving manner, thereby realizing double labor-saving traction driving of the hoist.

[0031] 5. The application sets a level detector, a controller, a leveling tool and a locking tool between the lifting movable pulley and the load flat plate, wherein the leveling tool adjusts and maintains the horizontal state of the load flat plate by stretching and retracting the reciprocating chain and the anti-off hook cable for directly pulling the load flat plate, and the locking tool locks and fixes the lifting pull rod sleeved in the plastic expansion joint plate group. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 is a structural schematic diagram of a large-tonnage container hoisting crane according to the application;

[0033] Fig. 2 is a bottom view of the large-tonnage container hoisting crane according to the application;

[0034] Fig. 3 is a structural schematic diagram of a trolley of the large-tonnage container hoisting crane according to the application;

[0035] Fig. 4 is a schematic diagram of a cross-section of the trolley of the large-tonnage container hoisting crane according to the application;

[0036] Fig. 5 is a structural schematic diagram of a hoisting device of the large-tonnage container hoisting crane according to the application;

[0037] Fig. 6 is a bottom view of the hoisting device of the large-tonnage container hoisting crane according to the application;

[0038] Fig. 7 is a structural schematic diagram of the hoisting device, a right-angle load-bearing support, a first traction mechanism, a second traction mechanism and a balance maintaining mechanism of the large-tonnage container hoisting crane according to the application;

[0039] Fig. 8 is a cross-sectional structural schematic diagram of the hoisting device, the right-angle load-bearing support, the first traction mechanism, the second traction mechanism and the balance maintaining mechanism of the large-tonnage container hoisting crane according to the application;

[0040] Fig. 9 is a structural schematic diagram of the balance maintaining mechanism of the large-tonnage container hoisting crane according to the application;

[0041] Fig. 10 is a cross-sectional structural schematic diagram of the balance maintaining mechanism of the large-tonnage container hoisting crane according to the application.

[0042] In the drawings:

[0043] 1. trolley; 11. main gantry; 12. middle cavity; 13. storage groove; 14. driving worm; 15. driven worm gear; 16. expansion joint swing arm; 17. right-angle expansion joint support; 18. locking universal wheel;

[0044] 2, hoist; 21, load flat plate; 22, double-end swing lever; 23, guide long hole; 24, transmission sliding block; 25, first connecting rod; 26, guide wedge table; 27, fixed clamp; 28, synchronous sleeve; 29, second connecting rod;

[0045] 3, right-angle load-bearing support;

[0046] 4, first traction mechanism; 41, first fixed pulley; 42, first traction roller; 43, lifting movable pulley; 44, first traction rope;

[0047] 5, second traction mechanism; 51, damping rotating shaft; 52, driving gear; 53, driven gear; 54, Y-shaped swing lever;

[0048] 55, elastic limiting piece; 551, guide screw; 552, telescopic threaded sleeve; 553, cross elastic telescopic rod;

[0049] 56, opening and closing swing lever; 57, moving movable pulley; 58, second fixed pulley; 59, second traction roller; 510, second traction rope;

[0050] 6, balance maintaining mechanism;

[0051] 61, level detector; 62, controller;

[0052] 63, leveling tool; 631, driving motor; 632, driving flywheel; 633, reciprocating chain; 634, anti-unhooking head cable; 635, load pull ring;

[0053] 64, locking tool; 641, funnel sleeve; 642, plastic opening and closing plate group; 643, spiral supercharging head; 644, hoisting pull rod; 645, stress section; 646, supercharging section. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0055] Referring to FIGS. 1-10, a large-tonnage container hoisting crane includes a trolley 1 and a hoist 2 for hoisting a square box, the trolley 1 is provided with a right-angle load-bearing support 3, a first traction mechanism 4, a second traction mechanism 5, and a balance maintaining mechanism 6:

[0056] The travelling crane 1 comprises a main portal frame 11 extending in a left-right direction, two right-angle opening and closing struts 17 extending in a front-rear direction and movably arranged on the main portal frame 11 to form a sub-portal frame, locking universal wheels 18 arranged at lower ends of the main portal frame 11 and the right-angle opening and closing struts 17, and it is to be noted that the locking universal wheels 18 are arranged to facilitate the deflection and telescopic adjustment of the right-angle opening and closing struts 17 and to provide movable support for the travelling crane 1.

[0057] The middle cavity 12 is arranged at a middle position of the main portal frame 11.

[0058] The two receiving grooves 13 are symmetrically arranged at front and rear positions of the main portal frame 11, and two right-angle opening and closing struts 16 in a receiving state are symmetrically arranged at the front and rear positions of the main portal frame 11, which is beneficial to improving the balance of the main portal frame 11 and providing symmetrical support for the telescopic adjustment.

[0059] The driving worm 14 is rotatably arranged in the middle cavity 12, and a first motor is arranged in the middle cavity 12 to drive the driving worm 14 to rotate, so that the driving worm 14 drives the two right-angle opening and closing struts 16 to perform deflection movement in a bidirectional rotation process.

[0060] The two driving worms 15 are rotatably arranged in the two receiving grooves 13, and the two driving worms 15 are in meshing connection with the driving worm 14. Under the driving action of the driving worm 14, one of the two driving worms 15 is deflected in a clockwise direction, and the other is deflected in an anticlockwise direction.

[0061] The right-angle opening and closing strut 17 is slidably sleeved on the right-angle opening and closing strut 16, and it is to be noted that a driving cylinder is arranged in the right-angle opening and closing strut 16 to drive the right-angle opening and closing strut 17 to horizontally telescope, so that the right-angle opening and closing strut 17 is synchronously adjusted to telescope in the opening and closing process of the right-angle opening and closing strut 16, and in particular, the right-angle opening and closing strut 17 is attached to the outer wall of the main portal frame 11 in a receiving state. The size of the travelling crane 1 can be adjusted by flexibly adjusting the right-angle opening and closing strut 17, and the travelling crane 1 can be symmetrically supported in a front-rear and left-right direction by the right-angle opening and closing strut 17.

[0062] The hoist 2 comprises a load plate 21, a fixing clamp 27 movably arranged in the load plate 21 to clamp and support a square box in a front-rear and left-right direction, a double-end swing rod 22, a guide long hole 23, a transmission sliding block 24, a guide wedge table 26, and a synchronous sleeve 28.

[0063] The double-end swing lever 22 is rotatably installed on the load plate 21, and the load plate 21 is provided with a second motor for driving the double-end swing lever 22 to deflect in two directions, so as to control the two transmission sliding blocks 24 to move towards or away from each other.

[0064] The guide long hole 23 is arranged in the load plate 21 and is distributed left and right.

[0065] The transmission sliding block 24 is slidably sleeved in the guide long hole 23 by the double-end swing lever 22, and the first connecting rod 25 is connected between the end of the double-end swing lever 22 and the transmission sliding block 24, and the double-end swing lever 22 pulls the two transmission sliding blocks 24 to move towards or away from each other during deflection;

[0066] The guide wedge table 26 is integrally connected to the load plate 21, and the fixed clamp 27 is slidably sleeved in the guide wedge table 26. Referring to FIGS. 5-7 and 9, the guide wedge table 26 is a right-angled triangular block with an opening in the middle, and the higher the position of the guide wedge table 26 approaches the center line of the load plate 21, the higher the fixed clamp 27 sleeved in the guide wedge table 26 is lifted by the synchronous sleeve 28, so as to be tilted and extended and retracted to symmetrically clamp and limit the square box.

[0067] The synchronous sleeve 28 is slidably sleeved on the fixed clamp 27 by the transmission sliding block 24, and the second connecting rod 29 is connected between the synchronous sleeve 28 and the transmission sliding block 24. It should be noted that the fixed clamp 27 has a U-shaped structure, and the bottom end is provided with a slope structure to facilitate the lifting of the square box.

[0068] The right-angled bearing bracket 3 is fixedly arranged on the travelling crane 1, and the right-angled bearing bracket 3 is integrally connected to the main gantry 11. The right-angled bearing bracket 3 has an opening in the middle to accommodate the pulley and roller structure of the first traction mechanism 4 and the second traction mechanism 5.

[0069] The first traction mechanism 4 is arranged on the travelling crane 1 through the right-angled bearing bracket 3, and the first traction mechanism 4 is used for lifting the lifting device 2 vertically in a labor-saving manner. The first traction mechanism 4 includes a lifting movable pulley 43, and the right-angled bearing bracket 3 is provided with a first traction roller 42. The first traction mechanism 4 further includes a first fixed pulley 41.

[0070] With reference to the drawings, the first fixed pulley 41 is fixedly installed on the main gantry 11, and the first traction rope 44 passes through the first fixed pulley 41, the lifting movable pulley 43 and the first traction roller 42 in sequence from the lifting movable pulley 43, so that the first traction roller 42 can exert a pulling force of about half the total weight of the lifting movable pulley 43, the hoist 2, the balance maintaining mechanism 6 and the square box on the first traction rope 44 under the condition of neglecting the frictional resistance, so as to facilitate the square box to be pulled in a labor-saving manner.

[0071] With reference to the drawings, the second traction mechanism 5 is arranged on the travelling crane 1 through the right-angle load-bearing support 3, and is used for driving the first traction mechanism 4 to operate in a labor-saving manner. The second traction mechanism 5 comprises a movable movable pulley 57 movably arranged on the right-angle load-bearing support 3, and the main gantry 11 is provided with a second traction roller 59. A second traction rope 510 for rotating the first traction roller 42 in a labor-saving manner is connected between the movable movable pulley 57 and the second traction roller 59. The second traction mechanism 5 further comprises a damping rotating shaft 51, a driving gear 52, a driven gear 53, a Y-shaped swing rod 54, an elastic limiting part 55, a tensioning and closing swing rod 56 and a second fixed pulley 58.

[0072] The damping rotating shaft 51 is rotatably installed on the right-angle load-bearing support 3, and the driving gear 52 is key-connected to the damping rotating shaft 51.

[0073] The driven gear 53 is key-connected to the first traction roller 42, and the driven gear 53 is meshingly connected with the driving gear 52. It needs to be noted that the differential principle is adopted between the driving gear 52 and the driven gear 53, and the transmission ratio (i) is used to achieve the labor-saving effect, in the following manner: i = the rotation speed of the driven gear 53 / the rotation speed of the driving gear 52 = the number of teeth of the driving gear 52 / the number of teeth of the driven gear 53.

[0074] Among them, the labor-saving or acceleration effect can be achieved by changing the size of i:

[0075] The transmission ratio condition logic effect is suggested as follows: i > 1, the rotation speed is reduced, and the torque is increased (sacrifice the rotation speed to exchange the torque) labor-saving 1 < i ≤ 5, i < 1, the rotation speed is increased, and the torque is reduced (sacrifice the torque to exchange the rotation speed) acceleration 0.2 ≤ i < 1. Table

[0076] The Y-shaped swing rod 54 is fixedly connected to the damping rotating shaft 51, and the damping rotating shaft 51 is deflected through the deflection of the Y-shaped swing rod 54, so as to drive the driven gear 53 to rotate through the driving gear 52.

[0077] The elastic limiting part 55 is movably installed on the right-angle load-bearing support 3, and is movably connected with the Y-shaped swing rod 54. The Y-shaped swing rod 54 is elastically pulled through the elastic limiting part 55, so as to be self-reset.

[0078] The opening and closing swing lever 56 is pivotally connected to the Y-shaped swing lever 54, and the moving movable pulley 57 is fixedly arranged on the opening and closing swing lever 56.

[0079] The second fixed pulley 58 is fixedly installed on the right-angle load-bearing support 3, the second traction rope 510 passes through the second fixed pulley 58, the moving movable pulley 57 and the second traction roller 59 in sequence from the moving movable pulley 57, and under the condition of neglecting the frictional resistance, the second traction roller 59 can exert a pulling force of about half of the total pulling force of the elastic limiting piece 55 elastic force and the moving movable pulley 57 gravity, so as to achieve the labor-saving effect.

[0080] The balance maintaining mechanism 6 is arranged between the hoister 2 and the first traction mechanism 4, and the balance maintaining mechanism 6 is used for adjusting and maintaining the hoister 2 to a balanced state with the first traction mechanism 4 as a force point. The balance maintaining mechanism 6 comprises four sets of leveling tools 63 for traction of the load flat plate 21 to a horizontal state, two sets of locking tools 64 for fixing the load flat plate 21 in the horizontal state are arranged between the lifting movable pulley 43 and the load flat plate 21, and the balance maintaining mechanism 6 further comprises a level detector 61 and a controller 62.

[0081] The level detector 61 is fixedly installed on the load flat plate 21, the controller 62 is fixedly installed on the load flat plate 21, and the controller 62 is electrically connected with the level detector 61. The level detector 61 is used for monitoring the levelness of the load flat plate 21, and when the load flat plate 21 is found to be inclined, the four sets of leveling tools 63 are controlled to operate through the controller 62.

[0082] The leveling tool 63 comprises a driving motor 631, a driving flywheel 632, a reciprocating chain 633, an anti-unhooking head cable 634 and a load pulling ring 635.

[0083] The driving motor 631 is fixedly installed on the lifting movable pulley 43.

[0084] The driving flywheel 632 is rotatably installed on the lifting movable pulley 43, and the driving flywheel 632 is fixedly connected with the output end of the driving motor 631. Four corner positions of the lifting movable pulley 43 are provided with notches, so as to accommodate the driving flywheel 632 and the reciprocating chain 633. The reciprocating chain 633 is driven to be adjusted in extension and contraction by rotating the driving flywheel 632.

[0085] The reciprocating chain 633 is slidably installed on the lifting movable pulley 43, and the reciprocating chain 633 is meshingly connected with the driving flywheel 632.

[0086] The anti-unhooking head cable 634 is fixedly connected to the reciprocating chain 633. It should be noted that, under the unified regulation of the controller 62, the anti-unhooking head cables 634 in the four sets of leveling tools 63 are adjusted in different degrees of extension and contraction, and the load pulling ring 635 is used to pull the load flat plate 21 to the horizontal state.

[0087] The load pulling ring 635 is fixedly installed on the load flat plate 21, and the load pulling ring 635 is assembled and connected with the anti-unhooking head cable 634.

[0088] The locking tool 64 includes a funnel sleeve 641, a plastic tensioning plate group 642, a spiral booster head 643, and a lifting pull rod 644.

[0089] The funnel sleeve 641 is integrally connected to the load flat plate 21.

[0090] The plastic tensioning plate group 642 is integrally connected in the funnel sleeve 641. The outer wall of the upper end of the plastic tensioning plate group 642 is provided with a stress section 645. The plastic tensioning plate group 642 is composed of 4-6 flexible steel plates, which are radially expanded in the initial state without the pressure of the spiral booster head 643. At this time, the lifting pull rod 644 passes through the plastic tensioning plate group 642 and the funnel sleeve 641.

[0091] The spiral booster head 643 is threadedly installed on the funnel sleeve 641. The inner wall of the lower end of the spiral booster head 643 is provided with a booster section 646 which movably abuts against the stress section 645. The spiral booster head 643 is threadedly connected with the funnel sleeve 641. By driving the spiral booster head 643 to move downward, the plastic tensioning plate group 642 can be pressed, so that the 4-6 flexible steel plates tend to be vertically closed, so as to lock and fix the lifting pull rod 644 which is sleeved in the funnel sleeve 641, and realize the rigid connection between the lifting movable pulley 43 and the load flat plate 21.

[0092] The lifting pull rod 644 is integrally connected to the lifting movable pulley 43, and the lifting pull rod 644 passes through the spiral booster head 643 and the plastic tensioning plate group 642 in sequence and penetrates the funnel sleeve 641.

[0093] The lifting movable pulley 43 is located directly above the load flat plate 21. The lifting movable pulley 43 is used to apply a traction effect to the load flat plate 21, so that the load flat plate 21 is synchronized with the lifting movable pulley 43 to rise and fall.

[0094] The elastic limiting part 55 includes a guide screw 551, a telescopic threaded sleeve 552, and a cross elastic telescopic rod 553.

[0095] The guide screw 551 is pin shaft installed on the right-angle bearing support 3.

[0096] The telescopic threaded sleeve 552 is matched and sleeved on the guide screw 551, and it is to be noted that the length of the cross elastic telescopic rod 553 sleeved in the telescopic threaded sleeve 552 can be adjusted by adjusting the connecting length between the guide screw 551 and the telescopic threaded sleeve 552, which is also helpful for real-time adjustment of the elastic coefficient of the elastic limiting piece 55.

[0097] The cross elastic telescopic rod 553 is sleeved at one end in the telescopic threaded sleeve 552, and the other end of the cross elastic telescopic rod 553 is connected with the Y-shaped swing rod 54 through a pin shaft, and under the traction of the cross elastic telescopic rod 553, the Y-shaped swing rod 54 is deflected to be horizontal.

[0098] With reference to Figs. 9 and 10, the four sets of leveling tools 63 are distributed radially, and the two sets of locking tools 64 are symmetrically distributed on the left and right. The four sets of leveling tools 63 are driven to be independently adjusted in the telescopic mode under the condition that the lifting movable pulley 43 and the load flat plate 21 are flexibly connected, until the load flat plate 21 is in a horizontal state, and then the load flat plate 21 in the horizontal state is fixed, so that the lifting movable pulley 43 and the load flat plate 21 are rigidly connected, to maintain the stability of the load flat plate 21 hoisting the square box.

[0099] It is to be noted that the specific model specifications of the first motor, the second motor, the drive motor 631, the drive cylinder, the level detector 61 and the controller 62 need to be determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, and thus is not described herein.

[0100] The function principle of the present application can be described by the following operation mode:

[0101] Firstly, the square box is fixed by the fixed clamp 27, that is, the double-head swing rod 22 is deflected, the first connecting rod 25 is pressed against the transmission sliding block 24, the transmission sliding block 24 further pulls the synchronous sleeve 28 through the second connecting rod 29, so that the two fixed clamps 27 at the same side move towards each other along the guide wedge table 26, and the fixed clamps 27 are inclined to move upwards due to the pressing of the guide wedge table 26, so as to clamp the square box.

[0102] Secondly, the first traction roller 42 is rotated by controlling the rotation of the second traction roller 59, and the square box is lifted to a height of 0.5 m from the ground, that is, the second traction roller 59 pulls the moving movable pulley 57 through the second traction rope 510, so that the opening and closing swing rod 56 is deflected to the Y-shaped swing rod 54, and the Y-shaped swing rod 54 drives the damping shaft 51 to be deflected, so that the elastic limiting piece 55 is compressed, wherein the cross elastic telescopic rod 553 is retracted into the telescopic threaded sleeve 552, and the first traction roller 42 is rotated by the drive gear 52 and the driven gear 53 of the damping shaft 51, so as to pull the first traction rope 44, so that the lifting movable pulley 43 is vertically lifted.

[0103] Then, the load plate 21 is adjusted to a horizontal state by the leveling tool 63, and then the horizontal state is fixed by the locking tool 64, that is, the level detector 61 monitors whether the load plate 21 is in a horizontal state in real time, if not, the four sets of leveling tools 63 are controlled to operate by the controller 62, that is, the driving motor 631 is controlled to be turned on to drive the driving flywheel 632 to rotate, so as to drive the reciprocating chain 633 to stretch and retract, thereby adjusting the extension and retraction of the anti-unhooking head cable 634, until the load plate 21 is horizontal, that is, the square box is horizontal;

[0104] Then, the first traction roller 42 is controlled to rotate by controlling the second traction roller 59 to rotate, and the square box is hoisted and adjusted by the hoisting device 2, and the height position of the square box is further adjusted by the above-mentioned operation;

[0105] Finally, the two right-angle opening and closing struts 17 are controlled to expand along the front and rear directions, and the mobile crane 1 is moved to hoist and adjust the square box, that is, the driving worm 14 is controlled to rotate, the driven worm wheel 15 is driven to rotate by the driving worm 14, the right-angle opening and closing swing arm 16 is driven to rotate by the driven worm wheel 15, the right-angle opening and closing swing arm 16 is driven to deflect synchronously by the right-angle opening and closing strut 17, and the right-angle opening and closing strut 17 is retracted along the right-angle opening and closing swing arm 16 to form a secondary gantry perpendicular to the primary gantry 11, and the mobile crane 1 is moved by the locking universal wheel 18 to adjust the displacement of the square box.

[0106] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A large-tonnage container hoisting crane comprising a trolley (1) and a spreader (2) for hoisting a square box, characterized in that, The travelling crane (1) is provided with: a right-angle load-bearing support (3) fixedly arranged on the travelling crane (1); a first traction mechanism (4) arranged on the travelling crane (1) through the right-angle load-bearing support (3), and the first traction mechanism (4) is used for power-saving traction of vertical lifting of a hoisting device (2); a second traction mechanism (5) arranged on the travelling crane (1) through the right-angle load-bearing support (3), and the second traction mechanism (5) is used for power-saving traction of operation of the first traction mechanism (4); and a balance maintaining mechanism (6) arranged between the hoisting device (2) and the first traction mechanism (4), and the balance maintaining mechanism (6) is used for adjusting and maintaining the hoisting device (2) to a balanced state with the first traction mechanism (4) as a fulcrum.

2. A large tonnage container handling crane according to claim 1, characterized in that The travelling crane (1) comprises a main gantry (11) extending leftward and rightward, two right-angle opening and closing struts (17) extending along a front-rear direction and arranged movably on the main gantry (11) to form a sub-gantry, and a locking universal wheel (18) arranged at a lower end of the main gantry (11) and the right-angle opening and closing struts (17).

3. A large tonnage container handling crane according to claim 2, characterised in that, The hoisting device (2) comprises a load-bearing flat plate (21), and a fixing clamp (27) movably arranged in the load-bearing flat plate (21) and used for clamping and upwardly supporting a square box from front-rear and left-right directions.

4. A large tonnage container handling crane according to claim 3, characterised in that, The right-angle load-bearing support (3) is integrally connected to the main gantry (11).

5. A large tonnage container handling crane according to claim 4, characterised in that, The first traction mechanism (4) comprises a lifting movable pulley (43), and a first traction roller (42) arranged on the right-angle load-bearing support (3), and a first traction rope (44) connected between the lifting movable pulley (43) and the first traction roller (42) and used for power-saving traction of vertical lifting of the hoisting device (2).

6. A large tonnage container handling crane according to claim 5, characterised in that, The lifting movable pulley (43) is located at a position directly above the load-bearing flat plate (21).

7. A large tonnage container handling crane and method of handling containers according to claim 6 wherein, The second traction mechanism (5) comprises a moving movable pulley (57) movably arranged on the right-angle load-bearing support (3), the main gantry (11) is provided with a second traction roller (59), and a second traction rope (510) connected between the moving movable pulley (57) and the second traction roller (59) and used for power-saving traction of rotation of the first traction roller (42).

8. A large tonnage container handling crane according to claim 7, characterised in that, The balance maintaining mechanism (6) comprises four sets of leveling tools (63) used for traction of the load-bearing flat plate (21) to a horizontal state, and two sets of locking tools (64) arranged between the lifting movable pulley (43) and the load-bearing flat plate (21) and used for fixation of the load-bearing flat plate (21) in the horizontal state.

9. A large tonnage container handling crane as claimed in claim 1, characterized in that The four sets of leveling tools (63) are distributed radially, and the two sets of locking tools (64) are distributed leftward and rightward symmetrically.

10. A method of hoisting a large tonnage container hoist crane as claimed in claim 9, characterized in that, The hoisting method comprises the following steps: step S1, fixing the square box through the fixing clamp (27); step S2, rotating the second traction roller (59) to rotate the first traction roller (42), and lifting the square box to a position with a height of 0.5 m from the ground; step S3, adjusting the load flat plate (21) to a horizontal state through the leveling tool (63), and then fixing the horizontal state through the locking tool (64); step S4, rotating the second traction roller (59) to rotate the first traction roller (42), and adjusting the square box lifting through the hoist (2); and step S5, expanding the two right-angle opening and closing struts (17) along the front and back directions to assist the main gantry (11) to move the travelling crane (1) to adjust the displacement of the square box.

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