A counterweight energy-saving system for a crossing quay crane

Abstract

The invention discloses a counterweight energy-saving system for a through-type quay crane. The upper trolley energy-saving system and the first lower trolley energy-saving system both include a motor, a reduction box, a lifting drum, a counterweight steel wire rope, a counterweight pulley block, a counterweight and a lifting steel wire rope. The motor, the reduction box and the lifting drum are sequentially connected in transmission. One end of the lifting steel wire rope is wound on the lifting drum, and the other end is connected to the upper trolley sling or the lower trolley sling. One end of the counterweight steel wire rope is wound on the lifting drum, and the other end is fixed on the quay crane structure by passing around the counterweight pulley block. The torque of the counterweight steel wire rope on the lifting drum is opposite to the torque direction of the lifting steel wire rope on the lifting drum, and the counterweight pulley block is connected to the counterweight. The invention can save 25% of the energy consumption of the quay crane, the winding is simple, and it does not interfere with other steel wire ropes on the trolley sling. At the same time, the flat lifting steel wire rope and the counterweight steel wire rope in the invention do not interfere with each other, thereby ensuring the strength of the lifting drum.

Description

Technical Field

[0001] The invention relates to the technical field of port loading and unloading equipment, in particular to a counterweight energy-saving system for a crossing-type quay crane. Background Art

[0002] Quay cranes are equipment specially used for loading and unloading container ships at ports and terminals. They undertake most of the loading and unloading work of container ships, which directly affects the operating costs and efficiency of ports and terminals. With the vigorous development of international trade, container ships are also developing towards large-scale. At present, 3E-class container ships with a carrying capacity of more than 24,000 TEUs have been put into use, which puts higher requirements on the loading and unloading capacity of ports and terminals. Therefore, it is necessary to improve the working efficiency of quay cranes. While the pressure of loading and unloading volume is increasing, ports and terminals are also facing the problem of increased energy consumption. As an important equipment of ports and terminals, quay cranes must also control energy consumption.

[0003] Traditional single-trolley quay cranes have low working efficiency. It is difficult to cope with the increasing cargo volume year by year by relying on only one trolley to load and unload containers. The cross-type quay crane uses two trolleys to cross the upper and lower trolleys, which can effectively improve the loading and unloading efficiency of containers and is the main development direction of quay cranes in the future. The two trolleys in the cross-type quay crane run at the same time. Compared with the traditional single-trolley quay crane, the energy consumption is higher and the demand for energy saving and consumption reduction is also greater.

[0004] At present, there are two main methods for quay cranes to save energy. One is to reduce the power consumption equipment of the quay crane and lower the operating parameters of the quay crane. This method will sacrifice the working efficiency and working performance of the quay crane and can no longer adapt to the current loading and unloading pressure. Another energy-saving method for quay cranes is to use counterweights to offset part of the energy consumption of the quay crane. There are two main layout methods. One is to connect the counterweight with the trolley hoist. The winding is complicated and difficult to arrange. It is easy to interfere with the original wire rope of the quay crane, affecting the normal operation of the quay crane. In addition, since the through-type quay crane is equipped with two trolleys, two sets of operating equipment and wire ropes are required. The original counterweight energy-saving method is more difficult to arrange and cannot be applied to the through-type quay crane. Another counterweight arrangement method is to connect the counterweight with the lifting drum. In order to wind the counterweight wire rope and the lifting wire rope separately, this method needs to extend the length of the lifting drum. The lifting drum needs to bear the tension of the counterweight and the container. The strength of the lifting drum with too long a length will decrease, reducing the load capacity of the quay crane or even making it unusable. Therefore, it is necessary to develop an energy-saving system suitable for the through-type quay crane to reduce the energy consumption of the through-type quay crane. Summary of the invention

[0005] The purpose of the present invention is to provide a counterweight energy-saving system for a crossing-type quay crane, which utilizes the counterweight to reduce the energy consumption of the upper and lower trolleys in the crossing-type quay crane for lifting containers. At the same time, the winding is simple, does not interfere with other steel wire ropes on the upper trolley hoist and the lower trolley hoist, and operates stably.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A counterweight energy-saving system for a crossing quay crane includes an upper trolley energy-saving system and a first lower trolley energy-saving system, and the upper trolley energy-saving system and the first lower trolley energy-saving system both include a motor, a reduction gearbox, a lifting drum, a counterweight steel wire rope, a counterweight pulley block, a counterweight and a lifting steel wire rope. The crossing quay crane is equipped with an upper trolley and a lower trolley at the same time, both of which can be used to lift containers and complete transshipment. The upper trolley and the lower trolley run at the same time, which can greatly improve the working efficiency of the quay crane. In order to reduce the operating energy consumption of the quay crane, both the upper trolley and the lower trolley need to be equipped with energy-saving systems, and the upper trolley energy-saving system and the first lower trolley energy-saving system are set separately to avoid mutual interference.

[0007] The motor, reduction box and lifting drum are connected in sequence, and the motor is used to supply energy to drive the lifting drum to rotate. One end of the lifting wire rope is wound on the lifting drum, and the other end of the lifting wire rope is connected to the upper trolley hoist or the lower trolley hoist. The lifting drum rotates to drive the lifting wire rope to reel in or unreel, so as to achieve the rise or fall of the upper trolley hoist or the lower trolley hoist. One end of the counterweight wire rope is wound on the lifting drum, and the other end of the counterweight wire rope is fixed on the quay crane structure by passing through the counterweight pulley block. The torque of the counterweight wire rope on the lifting drum is opposite to the torque of the lifting wire rope on the lifting drum, and the counterweight pulley block is connected to the counterweight. The torque of the counterweight acting on the lifting drum through the counterweight wire rope can offset a part of the torque acting on the lifting drum by the trolley hoist and the container through the lifting wire rope, thereby reducing the energy consumption of the quay crane.

[0008] The counterweight steel wire rope in the present invention is wound on the lifting drum. In order to prevent the lifting drum from being too long and the strength being reduced, the counterweight steel wire rope and the lifting steel wire rope in the present invention are wound in opposite directions, and the counterweight steel wire rope and the lifting steel wire rope are wound on the same position of the lifting drum, which can not only prevent the lifting drum from being too long, but also prevent the counterweight steel wire rope and the lifting steel wire rope from interfering with each other.

[0009] The counterweight pulley block described in the present invention comprises a movable pulley block and a fixed pulley block, wherein the movable pulley block is fixedly arranged on the counterweight, the fixed pulley block is arranged above the movable pulley block, and the fixed pulley block is fixedly connected to the quay crane structure. The movable pulley block is fixedly connected to the counterweight, and rises or falls with the counterweight, and utilizes the labor-saving and distance-saving characteristics of the movable pulley, and reduces the moving distance of the counterweight by increasing the weight of the counterweight, which is conducive to the stable balance of the system.

[0010] The number of pulleys in the movable pulley block described in the present invention is consistent with the number of pulleys in the fixed pulley block, which is convenient for arranging the counterweight steel wire rope.

[0011] Specifically, the movable pulley assembly described in the present invention includes a first movable pulley, a second movable pulley, a third movable pulley and a fourth movable pulley whose axes are on the same straight line, the fixed pulley assembly includes a first fixed pulley, a second fixed pulley, a third fixed pulley and a fourth fixed pulley whose axes are on the same straight line, the counterweight wire rope is drawn out from the lifting drum and extends to the first fixed pulley, the counterweight wire rope passes over the first fixed pulley from above and then passes over the first movable pulley from below, and then passes over the second fixed pulley, the second movable pulley, the third fixed pulley, the third movable pulley, the fourth fixed pulley and the fourth movable pulley in sequence and then extends upward to the quay crane structure. The winding of the counterweight wire rope is simple, and the provision of the first movable pulley, the second movable pulley, the third movable pulley and the fourth movable pulley can reduce the moving distance of the counterweight, and the moving distance of the counterweight is 1 / 8 of the moving distance of the trolley hoist.

[0012] The upper trolley energy-saving system described in the present invention has two motors, lifting drums, counterweight steel wire ropes, counterweight pulley blocks, counterweights and lifting steel wire ropes. The two motors and two lifting drums are symmetrically arranged on both sides of the reduction box. The two counterweight steel wire ropes and the two lifting steel wire ropes are respectively wound on the two lifting drums, and the two counterweight pulley blocks and the two counterweights are also symmetrically located on both sides of the reduction box. Two lifting steel wire ropes are provided to ensure that both sides of the upper trolley hoist rise or fall at the same time to avoid deflection. Two counterweight steel wire ropes and two counterweights are provided to prevent uneven force on both sides of the quay crane structure and structural instability.

[0013] The aforementioned counterweight energy-saving system for the through-type quay crane also includes a second trolley energy-saving system, the structure of which is the same as that of the first trolley energy-saving system, and the second trolley energy-saving system and the first trolley energy-saving system are arranged symmetrically with the axis of the quay crane beam as the axis. The second trolley energy-saving system is provided to ensure the stable operation of the trolley and prevent the quay crane structure from being unstable.

[0014] The aforementioned counterweight energy-saving system for a through-type quay crane also includes a floating coupling, the two ends of which are respectively connected to the reduction box in the first lower trolley energy-saving system and the reduction box shaft in the second lower trolley energy-saving system. Since the two sides of the lower trolley are respectively controlled by the first lower trolley energy-saving system and the second lower trolley energy-saving system, the floating coupling can prevent the rotation speed of the lifting drum in the first lower trolley energy-saving system and the lifting drum controlled by the second lower trolley energy-saving system from being inconsistent, thereby avoiding the tilting of the lower trolley hoist.

[0015] The motors, reduction gearboxes and lifting drums in the upper trolley energy-saving system, the first lower trolley energy-saving system and the second lower trolley energy-saving system are all arranged in the quay crane machine room. At the same time, the quay crane machine room is also equipped with a pitch mechanism, an upper trolley travel mechanism and a lower trolley travel mechanism. Since the lower trolley is provided in the through-type quay crane, additional equipment is required to realize the normal operation of the lower trolley. In order to facilitate management and maintenance, all of them are uniformly arranged in the quay crane machine room.

[0016] In order to prevent excessive vibration during the movement of the counterweight and affect the safe operation of the quay crane, the present invention also provides an oil-gas damper and a vibration-damping roller, and the counterweight is located inside the leg column of the quay crane. The counterweight is located in a closed space, which can prevent the interference of port crosswinds and the like on the counterweight and the counterweight wire rope, and prevent additional load from affecting the safety of the quay crane. One end of the oil-gas damper is connected to the end of the counterweight wire rope away from the lifting drum, and the other end of the oil-gas damper is fixedly connected to the quay crane structure. When the counterweight vibrates up and down, the oil-gas damper can gradually weaken the vibration of the counterweight and reduce the additional force on the energy-saving system. The vibration-damping roller is arranged on the outside of the counterweight. When the counterweight vibrates laterally, the vibration-damping roller is padded between the counterweight and the inner wall of the leg column of the quay crane to prevent the counterweight from hitting the leg column of the quay crane. At the same time, the vibration-damping roller can also avoid direct friction between the counterweight and the leg column of the quay crane, reducing the resistance of the counterweight to the up and down movement of the counterweight.

[0017] Compared with the prior art, the present invention is beneficial in that it provides a counterweight energy-saving system for a crossing quay crane, which can save 25% of the energy consumption of the quay crane without reducing the performance of the quay crane. The counterweight steel wire rope in the present invention is wound on the lifting drum, and the winding is simple, and does not interfere with other steel wire ropes on the trolley hoist. At the same time, the winding directions of the counterweight steel wire rope and the lifting steel wire rope in the present invention are opposite, and the counterweight steel wire rope and the lifting steel wire rope are wound on the same position of the lifting drum. The lifting steel wire rope and the counterweight steel wire rope do not interfere with each other, and there is no need to extend the length of the lifting drum, thereby ensuring the strength of the lifting drum. The present invention also provides a vibration reduction structure to reduce the vibration of the counterweight during movement, further improving the stability of the quay crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the upper trolley energy-saving system of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the first lower trolley energy-saving system and the second lower trolley energy-saving system in the present invention;

[0021] Figure 4 It is a schematic diagram of the arrangement of the pulleys in the counterweight pulley block 7 of the present invention;

[0022] Figure 5 It is a top view of the quay crane room in the present invention;

[0023] Figure 6 It is a schematic diagram of the arrangement of the oil-gas damping and vibration-reducing rollers in the present invention.

[0024] The meaning of the accompanying drawings: 1-energy-saving system for upper trolley, 2-energy-saving system for first lower trolley, 3-motor, 4-reduction gearbox, 5-lifting drum, 6-balance weight wire rope, 7-balance weight pulley block, 8-balance weight, 9-lifting wire rope, 10-movable pulley block, 11-fixed pulley block, 12-first movable pulley, 13-second movable pulley, 14-third movable pulley, 15-fourth movable pulley, 16-first fixed pulley, 17-second fixed pulley, 18-third fixed pulley, 19-fourth fixed pulley, 20-second energy-saving system for lower trolley, 21-floating coupling, 22-shore crane machine room, 23-oil and gas damping, 24-vibration-damping roller.

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0026] Embodiment 1 of the present invention: Figure 1 As shown, a counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a first lower trolley energy-saving system 2, wherein the upper trolley energy-saving system 1 and the first lower trolley energy-saving system 2 both include a motor 3, a reduction box 4, a lifting drum 5, a counterweight steel wire rope 6, a counterweight pulley block 7, a counterweight 8 and a lifting steel wire rope 9, which are used to realize the vertical movement of the upper trolley and the lower trolley of the through-type quay crane and reduce the energy consumption of lifting containers. The motor 3, the reduction box 4 and the lifting drum 5 are sequentially connected in transmission, and the motor 3 provides energy for the rotation of the lifting drum 5. One end of the lifting steel wire rope 9 is wound on the lifting drum 5, and the other end of the lifting steel wire rope 9 is connected to the upper trolley hoist or the lower trolley hoist. The lifting drum 5 rotates to drive the lifting steel wire rope 9 to move, thereby realizing the lifting and lowering of the upper trolley hoist or the lower trolley hoist. One end of the counterweight steel wire rope 6 is wound on the lifting drum 5, and the other end of the counterweight steel wire rope 6 is passed around the counterweight pulley block 7 and fixed on the quay crane structure. The torque of the counterweight steel wire rope 6 on the lifting drum 5 is opposite to the torque of the lifting steel wire rope 9 on the lifting drum 5. When the trolley hoist and the container move in the vertical direction, the lifting drum 5 will also drive the counterweight steel wire rope 6. The counterweight pulley block 7 is connected to the counterweight 8 to realize the vertical movement of the counterweight 8. The torque of the counterweight 8 acting on the lifting drum 5 through the counterweight steel wire rope 6 can offset a part of the torque of the trolley hoist and the container acting on the lifting drum 5 through the lifting steel wire rope 9, thereby reducing the energy consumption of the quay crane and achieving energy saving.

[0027] The winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 described in this embodiment are opposite, and the counterweight steel wire rope 6 and the lifting steel wire rope 9 are wound at the same position of the lifting drum 5. The space of the lifting drum 5 is saved, and the winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 are opposite. When the lifting drum 5 rotates, they can avoid mutual interference, and solve the problem of the lifting drum 5 being too long.

[0028] like Figure 2 or Figure 3 As shown, the counterweight pulley block 7 described in this embodiment includes a movable pulley block 10 and a fixed pulley block 11. The movable pulley block 10 is fixedly arranged on the counterweight 9, and the fixed pulley block 11 is arranged above the movable pulley block 10, and the fixed pulley block 11 is fixedly connected to the quay crane structure. The movable pulley block 10 rises or falls with the counterweight 8, and utilizes the characteristics of the movable pulley that saves effort and distance, and reduces the moving distance of the counterweight 8 by increasing the weight of the counterweight 8, which is beneficial to the stable balance of the system. The fixed pulley block 11 is arranged above the movable pulley block 10, which is convenient for winding the counterweight wire rope 6, simplifies the winding method, and is beneficial to the stable operation of this embodiment.

[0029] like Figure 4 As shown, the number of pulleys in the movable pulley block 10 is consistent with the number of pulleys in the fixed pulley block 11. The movable pulley block 10 described in this embodiment includes a first movable pulley 12, a second movable pulley 13, a third movable pulley 14 and a fourth movable pulley 15 whose axes are on the same straight line, and the fixed pulley block 11 includes a first fixed pulley 16, a second fixed pulley 17, a third fixed pulley 18 and a fourth fixed pulley 19 whose axes are on the same straight line. The counterweight steel wire rope 6 is led out from the lifting drum 5 and extends to the first fixed pulley 16. The counterweight steel wire rope 6 passes over the first fixed pulley 16 from above and then passes over the first movable pulley 12 from below, and then passes over the second fixed pulley 17, the second movable pulley 13, the third fixed pulley 18, the third movable pulley 14, the fourth fixed pulley 19 and the fourth movable pulley 15 in sequence and then extends upward to the quay crane structure. The arrangement of the counterweight pulley block 7 is conducive to the winding of the counterweight wire rope 6. The first movable pulley 12, the second movable pulley 13, the third movable pulley 14 and the fourth movable pulley 15 are provided, which can reduce the moving distance of the counterweight 8. When the trolley hoist and the container rise, the counterweight 8 descends, and the descending distance is 1 / 8 of the rising distance of the trolley hoist and the container.

[0030] Embodiment 2 of the present invention: Figure 1As shown, a counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a first lower trolley energy-saving system 2, wherein the upper trolley energy-saving system 1 and the first lower trolley energy-saving system 2 both include a motor 3, a reduction box 4, a lifting drum 5, a counterweight steel wire rope 6, a counterweight pulley block 7, a counterweight 8 and a lifting steel wire rope 9, which are used to realize the vertical movement of the upper trolley and the lower trolley of the through-type quay crane and reduce the energy consumption of lifting containers. The motor 3, the reduction box 4 and the lifting drum 5 are sequentially connected in transmission, and the motor 3 provides energy for the rotation of the lifting drum 5. One end of the lifting steel wire rope 9 is wound on the lifting drum 5, and the other end of the lifting steel wire rope 9 is connected to the upper trolley hoist or the lower trolley hoist. The lifting drum 5 rotates to drive the lifting steel wire rope 9 to move, thereby realizing the lifting and lowering of the upper trolley hoist or the lower trolley hoist. One end of the counterweight steel wire rope 6 is wound on the lifting drum 5, and the other end of the counterweight steel wire rope 6 is passed around the counterweight pulley block 7 and fixed on the quay crane structure. The torque of the counterweight steel wire rope 6 on the lifting drum 5 is opposite to the torque of the lifting steel wire rope 9 on the lifting drum 5. When the trolley hoist and the container move in the vertical direction, the lifting drum 5 will also drive the counterweight steel wire rope 6. The counterweight pulley block 7 is connected to the counterweight 8 to realize the vertical movement of the counterweight 8. The torque of the counterweight 8 acting on the lifting drum 5 through the counterweight steel wire rope 6 can offset a part of the torque of the trolley hoist and the container acting on the lifting drum 5 through the lifting steel wire rope 9, thereby reducing the energy consumption of the quay crane and achieving energy saving.

[0031] The winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 described in this embodiment are opposite, and the counterweight steel wire rope 6 and the lifting steel wire rope 9 are wound at the same position of the lifting drum 5. The space of the lifting drum 5 is saved, and the winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 are opposite. When the lifting drum 5 rotates, they can avoid mutual interference, and solve the problem of the lifting drum 5 being too long.

[0032] like Figure 2 or Figure 3 As shown, the counterweight pulley block 7 described in this embodiment includes a movable pulley block 10 and a fixed pulley block 11. The movable pulley block 10 is fixedly arranged on the counterweight 9, and the fixed pulley block 11 is arranged above the movable pulley block 10, and the fixed pulley block 11 is fixedly connected to the quay crane structure. The movable pulley block 10 rises or falls with the counterweight 8, and utilizes the characteristics of the movable pulley that saves effort and distance, and reduces the moving distance of the counterweight 8 by increasing the weight of the counterweight 8, which is beneficial to the stable balance of the system. The fixed pulley block 11 is arranged above the movable pulley block 10, which is convenient for winding the counterweight wire rope 6, simplifies the winding method, and is beneficial to the stable operation of this embodiment.

[0033] like Figure 2As shown, the upper trolley energy-saving system 1 described in the present invention has two motors 3, lifting drums 5, counterweight steel wire ropes 6, counterweight pulley blocks 7, counterweights 8 and lifting steel wire ropes 9. The two motors 3 and the two lifting drums 5 are symmetrically arranged on both sides of the reduction box 4. The two counterweight steel wire ropes 6 and the two lifting steel wire ropes 9 are respectively wound on the two lifting drums 5, and the two counterweight pulley blocks 7 and the two counterweights 8 are also symmetrically located on both sides of the reduction box 4. The two lifting steel wire ropes 9 are respectively connected to the two sides of the upper trolley hoist to prevent the upper trolley hoist from being deflected and difficult to lift. The symmetrical arrangement of the two counterweight steel wire ropes 6 and the two counterweights 8 is conducive to the stability of the quay crane structure and balanced force.

[0034] like Figure 3 As shown, the present embodiment also includes a second lower trolley energy-saving system 20, the structure of which is the same as that of the first lower trolley energy-saving system 2, and the second lower trolley energy-saving system 20 and the first lower trolley energy-saving system 2 are arranged symmetrically with the axis of the quay crane beam as the axis. The second lower trolley energy-saving system 20 is also provided to ensure the stable lifting of the lower trolley hoist, and at the same time, to prevent uneven force on both sides of the quay crane structure and improve the stability of the quay crane structure.

[0035] like Figure 3 As shown, since the second lower trolley energy-saving system 20 is provided in this embodiment, in order to avoid the rotation speed inconsistency between the lifting drum 5 in the first lower trolley energy-saving system 2 and the lifting drum 5 in the second lower trolley energy-saving system 20, a floating coupling 21 is further provided in this embodiment, and the two ends of the floating coupling 21 are respectively connected to the reduction box 4 in the first lower trolley energy-saving system 2 and the reduction box 4 in the second lower trolley energy-saving system 20. The floating coupling 21 can ensure that the reduction box 4 in the first lower trolley energy-saving system 2 and the reduction box 4 in the second lower trolley energy-saving system 20 have the same rotation speed, thereby avoiding the tilting of the lower trolley hoist.

[0036] Embodiment 3 of the present invention: Figure 1As shown, a counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a first lower trolley energy-saving system 2, wherein the upper trolley energy-saving system 1 and the first lower trolley energy-saving system 2 both include a motor 3, a reduction box 4, a lifting drum 5, a counterweight steel wire rope 6, a counterweight pulley block 7, a counterweight 8 and a lifting steel wire rope 9, which are used to realize the vertical movement of the upper trolley and the lower trolley of the through-type quay crane and reduce the energy consumption of lifting containers. The motor 3, the reduction box 4 and the lifting drum 5 are sequentially connected in transmission, and the motor 3 provides energy for the rotation of the lifting drum 5. One end of the lifting steel wire rope 9 is wound on the lifting drum 5, and the other end of the lifting steel wire rope 9 is connected to the upper trolley hoist or the lower trolley hoist. The lifting drum 5 rotates to drive the lifting steel wire rope 9 to move, thereby realizing the lifting and lowering of the upper trolley hoist or the lower trolley hoist. One end of the counterweight steel wire rope 6 is wound on the lifting drum 5, and the other end of the counterweight steel wire rope 6 is passed around the counterweight pulley block 7 and fixed on the quay crane structure. The torque of the counterweight steel wire rope 6 on the lifting drum 5 is opposite to the torque of the lifting steel wire rope 9 on the lifting drum 5. When the trolley hoist and the container move in the vertical direction, the lifting drum 5 will also drive the counterweight steel wire rope 6. The counterweight pulley block 7 is connected to the counterweight 8 to realize the vertical movement of the counterweight 8. The torque of the counterweight 8 acting on the lifting drum 5 through the counterweight steel wire rope 6 can offset a part of the torque of the trolley hoist and the container acting on the lifting drum 5 through the lifting steel wire rope 9, thereby reducing the energy consumption of the quay crane and achieving energy saving.

[0037] The winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 described in this embodiment are opposite, and the counterweight steel wire rope 6 and the lifting steel wire rope 9 are wound at the same position of the lifting drum 5. The space of the lifting drum 5 is saved, and the winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 are opposite. When the lifting drum 5 rotates, they can avoid mutual interference, and solve the problem of the lifting drum 5 being too long.

[0038] like Figure 2 or Figure 3 As shown, the counterweight pulley block 7 described in this embodiment includes a movable pulley block 10 and a fixed pulley block 11. The movable pulley block 10 is fixedly arranged on the counterweight 9, and the fixed pulley block 11 is arranged above the movable pulley block 10, and the fixed pulley block 11 is fixedly connected to the quay crane structure. The movable pulley block 10 rises or falls with the counterweight 8, and utilizes the characteristics of the movable pulley that saves effort and distance, and reduces the moving distance of the counterweight 8 by increasing the weight of the counterweight 8, which is beneficial to the stable balance of the system. The fixed pulley block 11 is arranged above the movable pulley block 10, which is convenient for winding the counterweight wire rope 6, simplifies the winding method, and is beneficial to the stable operation of this embodiment.

[0039] like Figure 4As shown, the number of pulleys in the movable pulley block 10 is consistent with the number of pulleys in the fixed pulley block 11. The movable pulley block 10 described in this embodiment includes a first movable pulley 12, a second movable pulley 13, a third movable pulley 14 and a fourth movable pulley 15 whose axes are on the same straight line, and the fixed pulley block 11 includes a first fixed pulley 16, a second fixed pulley 17, a third fixed pulley 18 and a fourth fixed pulley 19 whose axes are on the same straight line. The counterweight steel wire rope 6 is led out from the lifting drum 5 and extends to the first fixed pulley 16. The counterweight steel wire rope 6 passes over the first fixed pulley 16 from above and then passes over the first movable pulley 12 from below, and then passes over the second fixed pulley 17, the second movable pulley 13, the third fixed pulley 18, the third movable pulley 14, the fourth fixed pulley 19 and the fourth movable pulley 15 in sequence and then extends upward to the quay crane structure. The arrangement of the counterweight pulley block 7 is conducive to the winding of the counterweight wire rope 6. The first movable pulley 12, the second movable pulley 13, the third movable pulley 14 and the fourth movable pulley 15 are provided, which can reduce the moving distance of the counterweight 8. When the trolley hoist and the container rise, the counterweight 8 descends, and the descending distance is 1 / 8 of the rising distance of the trolley hoist and the container.

[0040] like Figure 2 As shown, the upper trolley energy-saving system 1 described in the present invention has two motors 3, lifting drums 5, counterweight steel wire ropes 6, counterweight pulley blocks 7, counterweights 8 and lifting steel wire ropes 9. The two motors 3 and the two lifting drums 5 are symmetrically arranged on both sides of the reduction box 4. The two counterweight steel wire ropes 6 and the two lifting steel wire ropes 9 are respectively wound on the two lifting drums 5, and the two counterweight pulley blocks 7 and the two counterweights 8 are also symmetrically located on both sides of the reduction box 4. The two lifting steel wire ropes 9 are respectively connected to the two sides of the upper trolley hoist to prevent the upper trolley hoist from being deflected and difficult to lift. The symmetrical arrangement of the two counterweight steel wire ropes 6 and the two counterweights 8 is conducive to the stability of the quay crane structure and balanced force.

[0041] like Figure 3 As shown, the present embodiment also includes a second lower trolley energy-saving system 20, the structure of which is the same as that of the first lower trolley energy-saving system 2, and the second lower trolley energy-saving system 20 and the first lower trolley energy-saving system 2 are arranged symmetrically with the axis of the quay crane beam as the axis. The second lower trolley energy-saving system 20 is also provided to ensure the stable lifting of the lower trolley hoist, and at the same time, to prevent uneven force on both sides of the quay crane structure and improve the stability of the quay crane structure.

[0042] like Figure 3As shown, since the second lower trolley energy-saving system 20 is provided in this embodiment, in order to avoid the rotation speed inconsistency between the lifting drum 5 in the first lower trolley energy-saving system 2 and the lifting drum 5 in the second lower trolley energy-saving system 20, a floating coupling 21 is further provided in this embodiment, and the two ends of the floating coupling 21 are respectively connected to the reduction box 4 in the first lower trolley energy-saving system 2 and the reduction box 4 in the second lower trolley energy-saving system 20. The floating coupling 21 can ensure that the reduction box 4 in the first lower trolley energy-saving system 2 and the reduction box 4 in the second lower trolley energy-saving system 20 have the same rotation speed, thereby avoiding the tilting of the lower trolley hoist.

[0043] Embodiment 4 of the present invention: Figure 1 As shown, a counterweight energy-saving system for a through-type quay crane includes an upper trolley energy-saving system 1 and a first lower trolley energy-saving system 2, wherein the upper trolley energy-saving system 1 and the first lower trolley energy-saving system 2 both include a motor 3, a reduction box 4, a lifting drum 5, a counterweight steel wire rope 6, a counterweight pulley block 7, a counterweight 8 and a lifting steel wire rope 9, which are used to realize the vertical movement of the upper trolley and the lower trolley of the through-type quay crane and reduce the energy consumption of lifting containers. The motor 3, the reduction box 4 and the lifting drum 5 are sequentially connected in transmission, and the motor 3 provides energy for the rotation of the lifting drum 5. One end of the lifting steel wire rope 9 is wound on the lifting drum 5, and the other end of the lifting steel wire rope 9 is connected to the upper trolley hoist or the lower trolley hoist. The lifting drum 5 rotates to drive the lifting steel wire rope 9 to move, thereby realizing the lifting and lowering of the upper trolley hoist or the lower trolley hoist. One end of the counterweight steel wire rope 6 is wound on the lifting drum 5, and the other end of the counterweight steel wire rope 6 is passed around the counterweight pulley block 7 and fixed on the quay crane structure. The torque of the counterweight steel wire rope 6 on the lifting drum 5 is opposite to the torque of the lifting steel wire rope 9 on the lifting drum 5. When the trolley hoist and the container move in the vertical direction, the lifting drum 5 will also drive the counterweight steel wire rope 6. The counterweight pulley block 7 is connected to the counterweight 8 to realize the vertical movement of the counterweight 8. The torque of the counterweight 8 acting on the lifting drum 5 through the counterweight steel wire rope 6 can offset a part of the torque of the trolley hoist and the container acting on the lifting drum 5 through the lifting steel wire rope 9, thereby reducing the energy consumption of the quay crane and achieving energy saving.

[0044] The winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 described in this embodiment are opposite, and the counterweight steel wire rope 6 and the lifting steel wire rope 9 are wound at the same position of the lifting drum 5. The space of the lifting drum 5 is saved, and the winding directions of the counterweight steel wire rope 6 and the lifting steel wire rope 9 are opposite. When the lifting drum 5 rotates, they can avoid mutual interference, and solve the problem of the lifting drum 5 being too long.

[0045] like Figure 2 or Figure 3As shown, the counterweight pulley block 7 described in this embodiment includes a movable pulley block 10 and a fixed pulley block 11. The movable pulley block 10 is fixedly arranged on the counterweight 9, and the fixed pulley block 11 is arranged above the movable pulley block 10, and the fixed pulley block 11 is fixedly connected to the quay crane structure. The movable pulley block 10 rises or falls with the counterweight 8, and utilizes the characteristics of the movable pulley that saves effort and distance, and reduces the moving distance of the counterweight 8 by increasing the weight of the counterweight 8, which is beneficial to the stable balance of the system. The fixed pulley block 11 is arranged above the movable pulley block 10, which is convenient for winding the counterweight wire rope 6, simplifies the winding method, and is beneficial to the stable operation of this embodiment.

[0046] like Figure 4 As shown, the number of pulleys in the movable pulley block 10 is consistent with the number of pulleys in the fixed pulley block 11. The movable pulley block 10 described in this embodiment includes a first movable pulley 12, a second movable pulley 13, a third movable pulley 14 and a fourth movable pulley 15 whose axes are on the same straight line, and the fixed pulley block 11 includes a first fixed pulley 16, a second fixed pulley 17, a third fixed pulley 18 and a fourth fixed pulley 19 whose axes are on the same straight line. The counterweight steel wire rope 6 is led out from the lifting drum 5 and extends to the first fixed pulley 16. The counterweight steel wire rope 6 passes over the first fixed pulley 16 from above and then passes over the first movable pulley 12 from below, and then passes over the second fixed pulley 17, the second movable pulley 13, the third fixed pulley 18, the third movable pulley 14, the fourth fixed pulley 19 and the fourth movable pulley 15 in sequence and then extends upward to the quay crane structure. The arrangement of the counterweight pulley block 7 is conducive to the winding of the counterweight wire rope 6. The first movable pulley 12, the second movable pulley 13, the third movable pulley 14 and the fourth movable pulley 15 are provided, which can reduce the moving distance of the counterweight 8. When the trolley hoist and the container rise, the counterweight 8 descends, and the descending distance is 1 / 8 of the rising distance of the trolley hoist and the container.

[0047] like Figure 2 As shown, the upper trolley energy-saving system 1 described in the present invention has two motors 3, lifting drums 5, counterweight steel wire ropes 6, counterweight pulley blocks 7, counterweights 8 and lifting steel wire ropes 9. The two motors 3 and the two lifting drums 5 are symmetrically arranged on both sides of the reduction box 4. The two counterweight steel wire ropes 6 and the two lifting steel wire ropes 9 are respectively wound on the two lifting drums 5, and the two counterweight pulley blocks 7 and the two counterweights 8 are also symmetrically located on both sides of the reduction box 4. The two lifting steel wire ropes 9 are respectively connected to the two sides of the upper trolley hoist to prevent the upper trolley hoist from being deflected and difficult to lift. The symmetrical arrangement of the two counterweight steel wire ropes 6 and the two counterweights 8 is conducive to the stability of the quay crane structure and balanced force.

[0048] like Figure 3As shown, the present embodiment also includes a second lower trolley energy-saving system 20, the structure of which is the same as that of the first lower trolley energy-saving system 2, and the second lower trolley energy-saving system 20 and the first lower trolley energy-saving system 2 are arranged symmetrically with the axis of the quay crane beam as the axis. The second lower trolley energy-saving system 20 is also provided to ensure the stable lifting of the lower trolley hoist, and at the same time, to prevent uneven force on both sides of the quay crane structure and improve the stability of the quay crane structure.

[0049] like Figure 3 As shown, since the second lower trolley energy-saving system 20 is provided in this embodiment, in order to avoid the rotation speed inconsistency between the lifting drum 5 in the first lower trolley energy-saving system 2 and the lifting drum 5 in the second lower trolley energy-saving system 20, a floating coupling 21 is further provided in this embodiment, and the two ends of the floating coupling 21 are respectively connected to the reduction box 4 in the first lower trolley energy-saving system 2 and the reduction box 4 in the second lower trolley energy-saving system 20. The floating coupling 21 can ensure that the reduction box 4 in the first lower trolley energy-saving system 2 and the reduction box 4 in the second lower trolley energy-saving system 20 have the same rotation speed, thereby avoiding the tilting of the lower trolley hoist.

[0050] like Figure 5 As shown, the motor 3, reduction box 4 and lifting drum 5 in the upper trolley energy-saving system 1, the first lower trolley energy-saving system 2 and the second lower trolley energy-saving system 20 described in this embodiment are all arranged in the quay crane machine room 22. At the same time, other equipment to ensure the normal operation of the quay crane is also arranged in the quay crane machine room 22, including a tilting mechanism, an upper trolley travel mechanism and a lower trolley travel mechanism

[0051] like Figure 6 As shown, the counterweight 8 is heavy and will vibrate when in motion, which may even affect the safe operation of the quay crane. In order to reduce the vibration of the counterweight 8, this embodiment is also provided with an oil-gas damper 23 and a vibration-damping roller 24, and the counterweight 8 is located inside the door leg column of the quay crane. The counterweight 8 is located in a closed space, which can prevent the interference of port crosswinds and the like on the counterweight 8 and the counterweight steel wire rope 6, and prevent the additional load from affecting the safe operation of the quay crane. One end of the oil-gas damper 23 is connected to the end of the counterweight steel wire rope 6 away from the lifting drum 5, and the other end of the oil-gas damper 23 is fixedly connected to the quay crane structure. The oil-gas damper 23 can effectively suppress the vibration of the counterweight 8 in the vertical direction, and at the same time make the counterweight 8 start and stop slowly, thereby improving the stability of this embodiment. The vibration-damping roller 24 is arranged on the outside of the counterweight 8. When the counterweight 8 vibrates laterally, the vibration-damping roller 24 is cushioned between the counterweight 8 and the inner wall of the quay crane leg column to prevent the counterweight 8 from hitting the quay crane leg column. At the same time, the vibration-damping roller 24 can also convert the sliding friction between the counterweight 8 and the quay crane leg column into rolling friction, thereby reducing the resistance to the up and down movement of the counterweight.

[0052] Working principle of the present invention: The present invention utilizes a counterweight 8 to achieve energy saving and consumption reduction of a quay crane. The torque exerted by the counterweight 8 on the lifting drum 5 through the counterweight wire rope 6 can offset a portion of the torque exerted on the lifting drum 5 by the trolley hoist and the container through the lifting wire rope 9. The movement direction of the counterweight 8 is opposite to the movement direction of the trolley hoist and the container. The potential energy lost by the counterweight 8 is utilized to reduce the energy consumption of lifting containers by the quay crane, thereby achieving energy saving effect.

[0053] The winding directions of the counterweight steel wire rope and the lifting steel wire rope in the present invention are opposite, and the counterweight steel wire rope and the lifting steel wire rope are wound at the same position of the lifting drum. The counterweight steel wire rope 6 and the lifting steel wire rope 9 do not interfere with each other when the lifting drum 5 rotates. This winding method solves the problem of the counterweight steel wire rope 6 and the lifting steel wire rope 9 interfering with each other, and at the same time, there is no need to extend the length of the lifting drum 5, thereby ensuring the strength of the lifting drum 5.

Claims

1. A counterweight energy-saving system for a traversing quay crane, characterized in that: The invention comprises an upper trolley energy-saving system (1) and a first lower trolley energy-saving system (2), wherein the upper trolley energy-saving system (1) and the first lower trolley energy-saving system (2) both comprise an electric motor (3), a reduction gearbox (4), a lifting drum (5), a counterweight steel wire rope (6), a counterweight pulley block (7), a counterweight (8) and a lifting steel wire rope (9), wherein the electric motor (3), the reduction gearbox (4) and the lifting drum (5) are sequentially connected in transmission, one end of the lifting steel wire rope (9) is wound around the lifting drum (5), and the other end of the lifting steel wire rope (9) is connected to the upper trolley hoist or the lower trolley hoist; one end of the counterweight steel wire rope (6) is wound around the lifting drum (5), and the counterweight steel wire rope The other end of the pulley (6) passes through the counterweight pulley block (7) and is fixed to the quayside bridge structure, and the torque of the counterweight steel wire rope (6) on the lifting drum (5) is opposite to the torque of the lifting steel wire rope (9) on the lifting drum (5); the counterweight pulley block (7) is connected to the counterweight (8); the counterweight pulley block (7) comprises a movable pulley block (10) and a fixed pulley block (11), the movable pulley block (10) is fixedly arranged on the counterweight (8), the fixed pulley block (11) is arranged above the movable pulley block (10), and the fixed pulley block (11) is fixedly connected to the quayside bridge structure; the movable pulley block (10) comprises a first movable pulley (12), a second movable pulley (13) and a second movable pulley (14) whose axes are on the same straight line. 13), a third movable pulley (14) and a fourth movable pulley (15), the fixed pulley group (11) comprising a first fixed pulley (16), a second fixed pulley (17), a third fixed pulley (18) and a fourth fixed pulley (19) whose axes are on the same straight line, the counterweight steel wire rope (6) is led out from the lifting drum (5) and extends toward the first fixed pulley (16), the counterweight steel wire rope (6) passes over the first fixed pulley (16) from above and then passes over the first movable pulley (12) from below, and then passes over the second fixed pulley (17), the second movable pulley (13), the third fixed pulley (18), the third movable pulley (14), the fourth fixed pulley (19) and the fourth movable pulley (15) in sequence, The invention further comprises an oil-gas damper (23) and a vibration-damping roller (24), wherein the counterweight (8) is located inside the leg column of the quay crane, one end of the oil-gas damper (23) is connected to the end of the counterweight steel wire rope (6) away from the lifting drum (5), and the other end of the oil-gas damper (23) is fixedly connected to the quay crane structure; the vibration-damping roller (24) is arranged on the outside of the counterweight (8); and the invention further comprises a second lower trolley energy-saving system (20), wherein the structure of the second lower trolley energy-saving system (20) is the same as that of the first lower trolley energy-saving system (2), and the second lower trolley energy-saving system (20) and the first lower trolley energy-saving system (2) are arranged symmetrically with the axis of the quay crane beam as the axis.

2. The counterweight energy-saving system for a through-type quay crane according to claim 1 is characterized in that: The winding directions of the counterweight steel wire rope (6) and the lifting steel wire rope (9) are opposite, and the counterweight steel wire rope (6) and the lifting steel wire rope (9) are wound at the same position of the lifting drum (5).

3. The counterweight energy-saving system for a through-type quay crane according to claim 1 is characterized in that: The number of pulleys in the movable pulley block (10) is consistent with the number of pulleys in the fixed pulley block (11).

4. The counterweight energy-saving system for a through-type quay crane according to claim 1 is characterized in that: The upper trolley energy-saving system (1) includes two motors (3), lifting drums (5), counterweight steel wire ropes (6), counterweight pulley blocks (7), counterweights (8) and lifting steel wire ropes (9). The two motors (3) are symmetrically arranged on both sides of the reduction box (4), and the two lifting drums (5) are symmetrically arranged on both sides of the reduction box (4). The two counterweight steel wire ropes (6) are respectively wound around the two lifting drums (5), and the two lifting steel wire ropes (9) are respectively wound around the two lifting drums (5). The two counterweight pulley blocks (7) are symmetrically located on both sides of the reduction box (4), and the two counterweights (8) are also symmetrically located on both sides of the reduction box (4).

5. The counterweight energy-saving system for a through-type quay crane according to claim 1 is characterized in that: It also includes a floating coupling (21), the two ends of which are respectively connected to the shafts of the reduction box (4) in the first lower trolley energy-saving system (2) and the reduction box (4) in the second lower trolley energy-saving system (20).

6. The counterweight energy-saving system for a through-type quay crane according to claim 1, characterized in that: The motor (3), reduction gearbox (4) and lifting drum (5) in the upper trolley energy-saving system (1) are all arranged in the quay crane machine room (22), the motor (3), reduction gearbox (4) and lifting drum (5) in the first lower trolley energy-saving system (2) are all arranged in the quay crane machine room (22), and the motor (3), reduction gearbox (4) and lifting drum (5) in the second lower trolley energy-saving system (20) are all arranged in the quay crane machine room (22).

Images