A super large gantry crane and control method thereof

Abstract

The present invention relates to the technical field of lifting devices, and in particular to an ultra-large gantry crane and a control method thereof, comprising a traveling frame, a lifting mechanism and an auxiliary mechanism, wherein the lifting mechanism is slidably installed on the top of the traveling frame, and the auxiliary mechanisms are fixedly installed at both ends of the traveling frame, and the lifting mechanism comprises a traveling trolley, a central axle seat is installed in the middle of the traveling trolley, and a first drum and a second drum are rotatably installed on both sides of the central axle seat; as the goods are lifted or lowered, the third drum is rotated by a third motor of the auxiliary mechanism, and then the auxiliary steel cable is rolled and unwound, which is convenient for cooperating with the lifting mechanism to lift the goods and improve the carrying capacity; at the same time, in the process of lifting and translation, the auxiliary steel cable is used to limit the wheel frame, and then in the process of lifting and transportation, the shaking of the goods can be effectively resisted, which is convenient for the safe transportation of the goods.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting devices, and in particular to an ultra-large gantry crane and a control method thereof. Background Art

[0002] Gantry crane is a kind of deformation of bridge crane, also called gantry crane, mainly used for loading and unloading of outdoor cargo yard, material yard cargo and bulk cargo. Gantry crane has the characteristics of high site utilization, large operating range, wide adaptability and strong versatility, and is widely used in port cargo yards.

[0003] In order to improve the carrying capacity, the existing gantry cranes are generally equipped with two or more motors to realize the rotation of the drum, and then to wind and unwind the lifting cable. However, the motor and the drum work synchronously, and the working quantity of the motor cannot be controlled according to the weight of the lifted goods, which causes a waste of resources. At the same time, during the lifting process, due to inertia and the influence of the external environment, the goods in transportation are easily shaken, posing certain safety hazards. Summary of the invention

[0004] The problem to be solved by the present invention is to provide an extra-large gantry crane and a control method thereof, which solves the technical problem that in order to improve the carrying capacity of the existing gantry crane, two or more motors are generally configured to realize the rotation of the drum, and then the lifting cable is wound and unwound, but the motor and the drum work synchronously, and the working quantity of the motor cannot be controlled according to the weight of the lifted goods, thereby causing a waste of resources; at the same time, during the lifting process, due to inertia and the influence of the external environment, the goods in transportation are easily shaken, and there are certain safety hazards.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An ultra-large gantry crane comprises a traveling frame, a lifting mechanism and an auxiliary mechanism, wherein the lifting mechanism is slidably mounted on the top of the traveling frame, and the auxiliary mechanisms are fixedly mounted on both ends of the traveling frame, and the lifting mechanism comprises a traveling trolley, a central axis seat is mounted in the middle of the traveling trolley, and a first drum and a second drum are rotatably mounted on both sides of the central axis seat, a lifting steel cable is connected to the first drum, and the lifting steel cable is connected to the second drum through two first guide wheels in a wheel frame, and a lifting hook is mounted on the bottom side of the wheel frame;

[0007] A polygonal plug is slidably installed in the first reel and the second reel, and when two ends of the polygonal plug are respectively located in the polygonal through hole of the first reel and the polygonal plug hole of the second reel, the first motor drives the first reel and the second reel to rotate synchronously;

[0008] When the polygonal plug is located in the first reel, the first motor drives the first reel to rotate, and the second motor drives the second reel to rotate.

[0009] Preferably, a first reducer is installed on one side of the top of the traveling trolley, the output end of the first reducer is connected to the first reel, and the input end of the first reducer is connected to the output end of the first motor.

[0010] Preferably, a second reducer is installed on the other side of the top of the walking trolley, the output end of the second reducer is connected to the second reel, and the input end of the second reducer is connected to the output end of the second motor.

[0011] Preferably, multiple through holes are provided inside the first drum and at the output end of the first reducer, and multiple insertion holes are provided inside the second drum.

[0012] Preferably, a hydraulic cylinder is installed on the side wall of the first reducer, and the piston rod of the hydraulic cylinder is located in the polygonal through hole and is installed with a polygonal plug through a bearing, and the polygonal plug slides in the polygonal through hole and the polygonal plug.

[0013] Preferably, side grooves are provided on two opposite sides of the wheel frame, symmetrical axis seats are installed on two opposite sides of the wheel frame, and a rotating shaft is installed between the symmetrical axis seats on the same side, and a second guide wheel is rotatably installed on the rotating shaft.

[0014] Preferably, the auxiliary mechanism includes a fixed block and a fixed seat installed at both ends of the walking frame, a third drum is rotatably installed on the fixed seat, and an auxiliary steel cable is connected to the third drum, and the auxiliary steel cable is connected to the fixed block after passing through the side groove and the second guide wheel.

[0015] Preferably, a support seat is installed on the fixed seat, and the support seat and the third reel are installed through a bearing, a third reducer is installed on the fixed seat, the output end of the third reducer is connected to the third reel, and the input end of the third reducer is connected to the output end of the third motor.

[0016] A control method for a super-large gantry crane, the specific operation steps of the control method are as follows:

[0017] Step 1: The hydraulic cylinder works and the piston rod moves to realize the translation of the multilateral plug column. When the two ends of the multilateral plug column are respectively located in the multilateral through hole of the first drum and the multilateral plug hole of the second drum, the first motor works and the first reducer adjusts the speed to realize the synchronous rotation of the first drum and the second drum, and the lifting cable is wound and unwound to realize the lifting and lowering of the wheel frame and the lifting hook;

[0018] Step 2: When the polygonal plug is in the polygonal through hole, the first motor works, the first reducer adjusts the speed, and the first drum rotates, while the second motor works, the second reducer adjusts the speed, and the second drum rotates, and the lifting cable is wound and unwound, so as to realize the lifting and lowering of the wheel frame and the lifting hook;

[0019] Step three: The third motor of the auxiliary mechanism works, and the third reducer adjusts the speed to realize the rotation of the third drum, and then winds and unwinds the auxiliary steel cable, which is convenient for cooperating with the lifting mechanism to lift the goods. At the same time, during translation, the wheel frame moves on the auxiliary steel cable through the second guide wheel, and the auxiliary steel cable limits the wheel frame to prevent the goods from shaking during lifting and transportation.

[0020] The beneficial effects of the present invention are as follows: the translation of the piston rod and the polygonal plug is realized by the hydraulic cylinder, thereby realizing the connection and separation of the first drum and the second drum; when the two ends of the polygonal plug are respectively located in the polygonal through hole and the polygonal plug hole, the first drum and the second drum are synchronously rotated by the first motor, the lifting cable is wound and unwound, and the cargo is lifted; when the polygonal plug is in the polygonal through hole, the rotation of the first drum is realized by the first motor, and the rotation of the second drum is realized by the second motor, the lifting cable is wound and unwound, and the lifting cable is wound and unwound, and the cargo is lifted; the load-bearing capacity is greatly improved by the operation of the two motors; at the same time, the two motors can be realized to work separately or simultaneously according to the actual cargo situation, so that resources can be saved while ensuring the load;

[0021] As the goods are raised or lowered, the third motor of the auxiliary mechanism realizes the rotation of the third drum, and then the auxiliary steel cable is wound and unwound, so as to cooperate with the lifting mechanism to lift the goods and improve the carrying capacity. At the same time, during the lifting and translation process, the auxiliary steel cable plays a limiting role on the wheel frame, so during the lifting and transportation process, it can effectively resist the shaking of the goods and facilitate the safe transportation of the goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the lifting mechanism and auxiliary mechanism of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0025] Figure 4 It is a partial cross-sectional view of the lifting mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the third reel installation structure of the present invention.

[0027] Legend:

[0028] 1. Traveling frame; 2. Lifting mechanism; 3. Auxiliary mechanism; 4. Traveling trolley; 5. Central axis seat; 6. First reducer; 7. First drum; 8. Second reducer; 9. Second drum; 10. First motor; 11. Second motor; 12. Multi-sided through holes; 13. Multi-sided plug holes; 14. Multi-sided plug columns; 15. Hydraulic cylinder; 16. Piston rod; 17. Lifting cable; 18. Wheel frame; 19. First guide wheel; 20. Lifting hook; 21. Side groove; 22. Symmetrical axis seat; 23. Rotating shaft; 24. Second guide wheel; 25. Fixed block; 26. Fixed seat; 27. Support seat; 28. Third reducer; 29. ​​Third drum; 30. Auxiliary cable; 31. Third motor. DETAILED DESCRIPTION

[0029] 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.

[0030] Specific examples are given below.

[0031] See also Figure 1~Figure 5 A super-large gantry crane comprises a traveling frame 1, a lifting mechanism 2 and an auxiliary mechanism 3. The lifting mechanism 2 is slidably installed on the top of the traveling frame 1, and the auxiliary mechanisms 3 are fixedly installed at both ends of the traveling frame 1.

[0032] The lifting mechanism 2 includes a traveling trolley 4, a central axis seat 5 is installed in the middle of the traveling trolley 4, and a first drum 7 and a second drum 9 are rotatably installed on both sides of the central axis seat 5, a lifting cable 17 is connected to the first drum 7, and the lifting cable 17 is connected to the second drum 9 through two first guide wheels 19 in the wheel frame 18, and a lifting hook 20 is installed on the bottom side of the wheel frame 18. A first reducer 6 is installed on one side of the top of the traveling trolley 4, and the output end of the first reducer 6 is connected to the first drum 7, and the input end of the first reducer 6 is connected to the first drum 7. The output end of the first motor 10 is connected, and a second reducer 8 is installed on the other side of the top of the walking trolley 4. The output end of the second reducer 8 is connected to the second drum 9, and the input end of the second reducer 8 is connected to the output end of the second motor 11. Through the operation of the motor, the speed of the reducer is adjusted to realize the rotation of the drum, and then the lifting cable 17 is wound and unwound, driving the wheel frame 18 and the lifting cable 17 to rise and fall, and the two first guide wheels 19 can drive the wheel frame 18 to move on the lifting cable 17 to adjust the position of the wheel frame 18.

[0033] A polygonal through hole 12 is formed inside the first reel 7 and at the output end of the first reducer 6, a polygonal plug hole 13 is formed inside the second reel 9, a hydraulic cylinder 15 is installed on the side wall of the first reducer 6, a piston rod 16 of the hydraulic cylinder 15 is located in the polygonal through hole 12 and is installed with a polygonal plug column 14 through a bearing, and the polygonal plug column 14 slides in the polygonal through hole 12 and the polygonal plug hole 13, and when the hydraulic cylinder 15 works, the piston rod 16 moves to realize the translation of the polygonal plug column 14, thereby facilitating the connection and separation of the first reel 7 and the second reel 9;

[0034] A polygonal plug 14 is slidably installed in the first reel 7 and the second reel 9. When the two ends of the polygonal plug 14 are respectively located in the polygonal through hole 12 of the first reel 7 and the polygonal plug hole 13 of the second reel 9, the first motor 10 drives the first reel 7 and the second reel 9 to rotate synchronously. When the polygonal plug 14 is located in the first reel 7, the first motor 10 drives the first reel 7 to rotate, and the second motor 11 drives the second reel 9 to rotate. When the two ends of the polygonal plug 14 are respectively located in the polygonal through hole 12 of the first reel 7 and the polygonal plug hole 13 of the second reel 9, the first motor 10 drives the first reel 7 to rotate, and the second motor 11 drives the second reel 9 to rotate. 3, at this time, the first motor 10 works, the first speed reducer 6 adjusts the speed, realizes the synchronous rotation of the first drum 7 and the second drum 9, winds and unwinds the lifting cable 17, and realizes the lifting and lowering of the wheel frame 18 and the lifting hook 20. When the multilateral plug 14 is in the multilateral through hole 12, at this time, the first motor 10 works, the first speed reducer 6 adjusts the speed, realizes the rotation of the first drum 7, and the second motor 11 works, the second speed reducer 8 adjusts the speed, realizes the rotation of the second drum 9, winds and unwinds the lifting cable 17, and realizes the lifting and lowering of the wheel frame 18 and the lifting hook 20.

[0035] Side grooves 21 are opened on both opposite sides of the wheel frame 18, and symmetrical axis seats 22 are installed on both opposite sides of the wheel frame 18. A rotating shaft 23 is installed between the symmetrical axis seats 22 on the same side, and a second guide wheel 24 is rotatably installed on the rotating shaft 23 to facilitate the auxiliary steel cable 30 to pass through the side grooves 21, and the wheel frame 18 moves along the auxiliary steel cable 30 through the second guide wheel 24.

[0036] The auxiliary mechanism 3 includes a fixed block 25 and a fixed seat 26 installed at both ends of the walking frame 1, a third drum 29 is rotatably installed on the fixed seat 26, and the third drum 29 is connected to an auxiliary steel cable 30, one end of the auxiliary steel cable 30 passes through the side groove 21 and the second guide wheel 24 and is connected to the fixed block 25, a support seat 27 is installed on the fixed seat 26, and the support seat 27 and the third drum 29 are installed through a bearing, a third reducer 28 is installed on the fixed seat 26, and the output end of the third reducer 28 is connected to the third drum 29, and the output end of the third reducer 28 is connected to the third drum 29. The input end is connected to the output end of the third motor 31, the third motor 31 of the auxiliary mechanism 3 is working, the third reducer 28 adjusts the speed to realize the rotation of the third drum 29, and then the auxiliary steel cable 30 is wound and unwound, which is convenient for cooperation with the lifting mechanism 2 to lift the goods and improve the carrying capacity. At the same time, during translation, the wheel frame 18 moves on the auxiliary steel cable 30 through the second guide wheel 24, and the auxiliary steel cable 30 plays a role of limiting the wheel frame 18, so that during the lifting and transportation process, it can effectively resist the shaking of the goods and facilitate the safe transportation of the goods.

[0037] A control method for a super-large gantry crane, the specific operation steps of the control method are as follows:

[0038] Step 1: The hydraulic cylinder 15 works and the piston rod 16 moves to realize the translation of the polygonal plug column 14. When the two ends of the polygonal plug column 14 are respectively located in the polygonal through hole 12 of the first drum 7 and the polygonal plug hole 13 of the second drum 9, the first motor 10 works and the first reducer 6 adjusts the speed to realize the synchronous rotation of the first drum 7 and the second drum 9, and the lifting cable 17 is wound and released to realize the lifting and lowering of the wheel frame 18 and the lifting hook 20;

[0039] Step 2: When the polygonal plug 14 is in the polygonal through hole 12, the first motor 10 works, the first reducer 6 adjusts the speed, and the first drum 7 rotates, while the second motor 11 works, the second reducer 8 adjusts the speed, and the second drum 9 rotates, and the lifting cable 17 is wound and unwound, so as to realize the lifting and lowering of the wheel frame 18 and the lifting hook 20;

[0040] Step three: The third motor 31 of the auxiliary mechanism 3 works, and the third reducer 28 adjusts the speed to realize the rotation of the third drum 29, and then winds and unwinds the auxiliary steel cable 30, so as to cooperate with the lifting mechanism 2 to lift the goods. At the same time, during translation, the wheel frame 18 moves on the auxiliary steel cable 30 through the second guide wheel 24, and the auxiliary steel cable 30 limits the wheel frame 18 to prevent the goods from shaking during lifting and transportation.

[0041] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-large gantry crane, characterized in that: The invention comprises a walking frame (1), a lifting mechanism (2) and an auxiliary mechanism (3), wherein the lifting mechanism (2) is slidably mounted on the top of the walking frame (1), and the auxiliary mechanisms (3) are fixedly mounted at both ends of the walking frame (1), the lifting mechanism (2) comprises a walking trolley (4), a central axis seat (5) is mounted in the middle of the walking trolley (4), and a first drum (7) and a second drum (9) are rotatably mounted on both sides of the central axis seat (5), the first drum (7) is connected to a lifting steel cable (17), and the lifting steel cable (17) is connected to the second drum (9) through two first guide wheels (19) in a wheel frame (18), and a lifting hook (20) is mounted on the bottom side of the wheel frame (18), a first reducer (6) is mounted on one side of the top of the walking trolley (4), the output end of the first reducer (6) is connected to the first drum (7), the input end of the first reducer (6) is connected to the output end of the first motor (10), and the top of the walking trolley (4) is connected to the first drum (7). A second reducer (8) is installed on the other side, the output end of the second reducer (8) is connected to the second drum (9), the input end of the second reducer (8) is connected to the output end of the second motor (11), the first drum (7) and the output end of the first reducer (6) are provided with a plurality of through holes (12), the second drum (9) is provided with a plurality of insertion holes (13), a hydraulic cylinder (15) is installed on the side wall of the first reducer (6), the piston rod (16) of the hydraulic cylinder (15) is located in the plurality of through holes (12) and is provided with a plurality of insertion columns (14) through bearings, and the plurality of insertion columns (14) slide in the plurality of through holes (12) and the plurality of insertion holes (13), side grooves (21) are provided on both opposite sides of the wheel frame (18), symmetrical shaft seats (22) are provided on both opposite sides of the wheel frame (18), a rotating shaft (23) is provided between the symmetrical shaft seats (22) on the same side, and a second guide wheel (24) is rotatably provided on the rotating shaft (23); A polygonal plug-in column (14) is slidably mounted inside the first reel (7) and the second reel (9); when two ends of the polygonal plug-in column (14) are respectively located in the polygonal through hole (12) of the first reel (7) and the polygonal plug-in hole (13) of the second reel (9), the first motor (10) drives the first reel (7) and the second reel (9) to rotate synchronously; When the polygonal plug (14) is located in the first reel (7), the first motor (10) drives the first reel (7) to rotate, and the second motor (11) drives the second reel (9) to rotate; The auxiliary mechanism (3) comprises a fixed block (25) and a fixed seat (26) mounted at both ends of the walking frame (1); a third drum (29) is rotatably mounted on the fixed seat (26); the third drum (29) is connected to an auxiliary steel cable (30); the auxiliary steel cable (30) is connected to the fixed block (25) after passing through a side groove (21) and a second guide wheel (24); a support seat (27) is mounted on the fixed seat (26); the support seat (27) and the third drum (29) are mounted via bearings; a third reducer (28) is mounted on the fixed seat (26); an output end of the third reducer (28) is connected to the third drum (29); and an input end of the third reducer (28) is connected to an output end of a third motor (31).

2. The control method of a super large gantry crane according to claim 1, characterized in that: The specific operation steps of this control method are as follows: Step 1: The hydraulic cylinder (15) works and the piston rod (16) moves to realize the translation of the polygonal plug column (14). When the two ends of the polygonal plug column (14) are respectively located in the polygonal through hole (12) of the first drum (7) and the polygonal plug hole (13) of the second drum (9), the first motor (10) works and the first reducer (6) adjusts the speed to realize the synchronous rotation of the first drum (7) and the second drum (9), and the lifting cable (17) is wound and released to realize the lifting and lowering of the wheel frame (18) and the lifting hook (20); Step 2: When the polygonal plug (14) is in the polygonal through hole (12), the first motor (10) operates and the first reducer (6) adjusts the speed to realize the rotation of the first drum (7), while the second motor (11) operates and the second reducer (8) adjusts the speed to realize the rotation of the second drum (9), and the lifting cable (17) is wound and released to realize the lifting and lowering of the wheel frame (18) and the lifting hook (20); Step three: The third motor (31) of the auxiliary mechanism (3) is operated, and the third reducer (28) is adjusted to realize the rotation of the third drum (29), thereby winding and unwinding the auxiliary steel cable (30), so as to cooperate with the lifting mechanism (2) to lift the goods. At the same time, during translation, the wheel frame (18) moves on the auxiliary steel cable (30) through the second guide wheel (24), and the auxiliary steel cable (30) plays a role of limiting the wheel frame (18), so as to prevent the goods from shaking during the lifting and transportation process.

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