Container anti-swing structure and container quay crane

Abstract

The invention relates to the technical field of port container loading and unloading equipment, and discloses a container anti-swing structure and a container quay crane. One end of the hoisting steel wire rope is connected with the container through the sling, and the other end is connected with the container through the sling after winding the hoisting pulley; the driving piece is connected with a pulley yoke provided with the lifting pulley, and the driving piece is suitable for driving the lifting pulley to reciprocate; the sensor acquires the swinging direction of the lifting appliance in real time; when the lifting appliance swings, the controller obtains the swinging direction of the lifting appliance through the sensor, and controls the lifting pulley to move in the direction opposite to the swinging direction of the lifting appliance in real time through the driving piece. The driving piece drives the lifting pulley and the lifting steel wire rope to move, the field angle of the lifting steel wire rope is changed, and the component force of the lifting steel wire rope in the horizontal direction is changed. The angle of the steel wire rope is adjusted according to the swinging condition of the sling to achieve quick stabilization; loading and unloading operation efficiency is obviously improved, and operation safety is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of port container loading and unloading equipment technology, specifically to a container anti-sway structure and a container quay crane. Background Technology

[0002] The rapid development of the world economy has driven the rapid development of shipping logistics, resulting in a continuous increase in global container throughput. As a key loading and unloading equipment in container terminals, improving the loading and unloading efficiency of container quay cranes is a crucial factor in improving the overall efficiency of the terminal. In conventional quay crane operations, the spreader of the container quay crane lifts the container to the top via wire ropes, and then the quay crane trolley moves the container by means of a pulley mechanism.

[0003] However, when the spreader lifts the container to the upper limit position, especially when the container is near the top, the elasticity of the wire rope and the vibration of the pulley mechanism itself, as well as the influence of other external forces such as wind, can easily cause the spreader and container to swing violently and repeatedly. The quay crane trolley must wait for the spreader and container to stabilize before proceeding with the next movement. This is because the violent swinging and shaking of the container can easily cause the spreader or container to collide with the quay crane trolley's cab or main structure, posing a serious safety hazard. Therefore, the violent swinging of the spreader and container not only significantly affects loading and unloading efficiency but also seriously affects operational safety. Summary of the Invention

[0004] In view of this, the present invention provides a container anti-sway structure and a container quay crane to solve the problem that when existing spreaders lift containers, the elasticity of the wire rope and the vibration of the pulley mechanism itself, as well as the influence of other external forces such as wind, can easily cause the spreader to drive the container to sway violently and repeatedly. This can lead to the spreader or container colliding with the driver's cab or main structure of the quay crane trolley, which not only significantly affects loading and unloading efficiency but also seriously affects operational safety.

[0005] In a first aspect, the present invention provides a container anti-sway structure, comprising:

[0006] Lifting pulleys are designed to move within horizontal tracks provided on container quay cranes.

[0007] The lifting wire rope is connected to the container at one end via a spreader, and the other end of the lifting wire rope is wound around the lifting pulley and then connected to the container via the spreader.

[0008] A driving component is connected to a pulley frame on which the lifting pulley is mounted, and the driving component is adapted to drive the lifting pulley to reciprocate in a horizontal slide rail;

[0009] Sensors suitable for acquiring the swing direction of the spreader in real time;

[0010] The controller is signal-connected to both the drive unit and the sensors. When the spreader sways, the controller is adapted to acquire the sway direction of the spreader in real time via sensors and control the lifting pulley to move in the opposite direction of the sway direction via the drive unit. Beneficial effects: This application adopts the above technical solution. The drive unit moves the lifting wire rope, which has been redirected by the lifting pulley, changing the angle of the lifting pulley, thus changing the angle of the lifting wire rope. The vertical component of the force on the lifting wire rope is the weight of the spreader and the container. Changing the angle of the wire rope changes the horizontal component of the force. The greater the horizontal component of the wire rope, the stronger its ability to resist external disturbances. By setting an adjustable lifting pulley driven by the drive unit, the angle of the wire rope on one or both sides can be adjusted according to the sway of the spreader and the container to achieve rapid sway reduction; quickly stop the swaying of the spreader at the top, significantly improve loading and unloading efficiency, and ensure operational safety.

[0011] Optionally, the drive component is a planetary lead screw.

[0012] Optionally, the sensor is a gyroscope, which is mounted on the lifting device; the gyroscope is suitable for real-time monitoring of the angle changes of the lifting device, thereby determining the swing direction of the lifting device. Beneficial effects: This application adopts the above technical solution, using a gyroscope to monitor the normality of the lifting device's attitude in real time, thus improving operational safety.

[0013] Optionally, the sensor is a force sensor, which is installed on both sides of the lifting wire rope wound around the lifting pulley. The direction of the lifting device's swing is determined based on the magnitude of the force acting on the lifting wire rope on both sides.

[0014] Optionally, when the force on one side of the hoisting wire rope is less than the force on the same side when it is stationary, the lifting device will sway to that side.

[0015] Optionally, it also includes:

[0016] A buffer mechanism is disposed between the pulley frame and the quay crane; the quay crane is adapted to move the pulley frame and the lifting pulley in a horizontal track, thereby moving the spreader and the container. Beneficial effects: By adopting the above technical solution, when the spreader and the container bounce together, the bounce is transmitted to the lifting pulley. At this time, the lifting pulley, wire rope, and spreader bounce together, and the buffer mechanism directly acts on the entire bouncing motion, quickly reducing the overall bouncing amplitude and achieving rapid sway reduction in the vertical direction.

[0017] Optionally, the buffer mechanism includes a rubber spring and a damper connected in parallel. Beneficial effects: By adopting the above technical solution, the rubber spring of the buffer mechanism can reduce the amplitude of the bounce, while the damper can quickly dissipate the energy of the bounce, achieving rapid sway reduction in the vertical direction.

[0018] Optionally, a rubber spring with appropriate stiffness can be selected based on the weight and frequency characteristics of the spreader and container, and a damper can be used to adjust the damping value so that the damping value of the buffer mechanism reaches the critical damping state. Beneficial effects: This application adopts the above technical solution, which reduces the jumping amplitude of the spreader and container while rapidly dissipating the jumping energy and quickly stopping the jumping.

[0019] Optionally, the lifting pulleys are a plurality of those spaced apart along the horizontal slide rail, and the lifting wire rope, drive component, and sensor are a plurality of those corresponding to the lifting pulleys.

[0020] Secondly, the present invention also provides a container quay crane, including: the aforementioned container anti-sway structure. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the container quay crane provided in the embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the anti-sway structure for containers provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic view of the buffer mechanism provided in an embodiment of the present invention.

[0025] Figure 4 This is a cross-sectional view of the buffer mechanism provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Lifting pulleys; 2. Horizontal slide rails; 3. Lifting wire ropes; 4. Lifting equipment; 5. Containers; 6. Drive components; 7. Pulley frames; 8. Rubber springs; 9. Dampers; 10. Quay cranes. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] During container lifting, the elasticity of the wire rope, the vibration of the pulley mechanism itself, and the influence of external forces such as wind on the spreader can easily cause the spreader to cause the container to bounce violently. In traditional quay crane trolley mechanisms, the lifting pulleys are rigidly connected to the trolley structure, and the bouncing action of the wire rope is transmitted to the rigid pulleys. The bouncing takes a long time to weaken, significantly affecting loading and unloading efficiency. For the above reasons, this application proposes a container anti-sway structure.

[0030] like Figures 1 to 4 The illustrated container quay crane includes a container anti-sway structure. The container quay crane described in this application is installed in a port for loading and unloading containers 5.

[0031] like Figure 2 and Figure 4 As shown, the container anti-sway structure includes: a lifting pulley 1, a lifting wire rope 3, a drive unit 6, a sensor, and a controller. The lifting pulley 1 is adapted to move within a horizontal slide rail 2 provided on the container quay crane. One end of the lifting wire rope 3 is connected to the container 5 via a spreader 4, and the other end of the lifting wire rope 3 is wound around the lifting pulley 1 and then connected to the container 5 via the spreader 4; the spreader 4 can lift the container 5. The drive unit 6 is connected to a pulley frame 7 on which the lifting pulley 1 is mounted, and the drive unit 6 is adapted to drive the lifting pulley 1 to reciprocate within the horizontal slide rail 2. The sensor is adapted to acquire the sway direction of the spreader 4 in real time. The controller is signal-connected to the drive unit 6 and the sensor; when the spreader 4 sways, the controller is adapted to acquire the sway direction of the spreader 4 in real time via the sensor, and control the lifting pulley 1 to move in the opposite direction to the sway direction of the spreader 4 via the drive unit 6.

[0032] Specifically, the driving component 6 is a planetary screw. The planetary screw drives the lifting pulley 1 to move in the opposite direction of the swaying, which changes the angle of the lifting wire rope 3, thereby changing the horizontal component of the lifting wire rope 3. The horizontal force in the opposite direction of the movement increases, pulling the lifting device 4 back, thus achieving the function of quickly stopping the swaying.

[0033] Specifically, the sensor is a gyroscope, which is mounted on the lifting device 4. The gyroscope is suitable for real-time monitoring of the angle changes of the lifting device 4, thereby determining the swing direction of the lifting device 4. Alternatively, the sensor is a force sensor, which is mounted on both sides of the lifting wire rope 3 wound around the lifting pulley 1. The swing direction of the lifting device 4 is determined based on the magnitude of the force acting on the lifting wire rope 3 on both sides. When the force acting on one side of the lifting wire rope 3 is less than the force acting on the same side when it is stationary, the lifting device 4 swings to that side. If the lifting device 4 swings from a stable state to one side, then the length of the lifting wire rope 3 on that side is longer than the required length, the force on the lifting wire rope 3 on that side is smaller than in the stable state, and the force acting on the lifting pulley 1 is also smaller. The difference between the swing state and the stable state can be monitored to obtain the swing state of the lifting device 4.

[0034] Furthermore, the container anti-sway structure described in this application also includes: a buffer mechanism, which is disposed between the main structure of the pulley frame 7 and the quay crane 10; the quay crane 10 is adapted to drive the pulley frame 7 and the lifting pulley 1 to move in the horizontal slide 2, thereby driving the spreader 4 and the container 5 to move.

[0035] Specifically, such as Figure 3 As shown, the buffer mechanism includes a rubber spring 8 and a damper 9 connected in parallel. Further, a rubber spring 8 with a suitable stiffness value is selected based on the weight and frequency characteristics of the spreader 4 and the container 5, and the damper 9 is used to adjust the damping value to a suitable level, so that the damping value of the buffer mechanism reaches or approaches the critical damping state. The container anti-sway structure described in this application reduces the swaying and shaking of the container 5 and the spreader 4 by damping the lifting pulley 1. The rubber spring 8 provides the stiffness value and a portion of the damping value of the buffer mechanism, while the damper 9 provides the required damping value. The planetary screw can drive the pulley frame 7 to perform linear motion.

[0036] like Figure 2 As shown, the lifting pulleys 1 are arranged in multiple, specifically three, spaced apart along the horizontal slide rail 2. The lifting wire rope 3, drive unit 6, and sensor are arranged in multiple corresponding to the lifting pulleys 1. The container anti-sway structure described in this application reduces the swaying and shaking of the container 5 and the spreader 4 by changing the spacing of the lifting pulleys 1 and adjusting the angle of the lifting wire rope 3; thus enabling the spreader 4 to quickly stop swaying. This facilitates the driver inside the quay crane 10 to control the movement of the lifting pulleys 1 within the horizontal slide rail 2 of the container quay crane.

[0037] When the container quay crane of this application is in operation, the hoisting wire rope 3 lifts the spreader 4 and the container 5 upwards. Near the top, it often encounters strong winds or other disturbances, causing the hoisting wire rope 3 and the spreader 4 to sway from side to side. At this time, it is necessary to quickly stop the swaying of the spreader 4 and the container 5. The planetary screw drives the hoisting pulley 1 to move linearly along the direction of travel of the quay crane 10 within the horizontal slide rail 2. Simply moving the hoisting pulley 1 in the opposite direction to the swaying of the spreader 4 will quickly increase the angle on one side of the hoisting wire rope 3, simultaneously increasing the horizontal component of the force on one side of the hoisting wire rope 3. This force, opposite to the movement trend of the spreader 4 and the container 5, can pull the spreader 4 and the container 5 back, reducing the amplitude of their swaying. With one or two movements of the hoisting pulley 1, the swaying of the spreader 4 can be quickly stopped. For the vertical jumping of the spreader 4 and the container 5, a buffer mechanism consisting of a rubber spring 8 and a damper 9 is used.

[0038] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A container anti-sway structure, characterized in that, include: The lifting pulley (1) is adapted to move in the horizontal slide (2) provided on the container quay crane; The lifting wire rope (3) is connected to the container (5) at one end through the spreader (4), and the other end of the lifting wire rope (3) is wound around the lifting pulley (1) and then connected to the container (5) through the spreader (4); The driving component (6) is connected to the pulley frame (7) on which the lifting pulley (1) is mounted. The driving component (6) is adapted to drive the lifting pulley (1) to reciprocate in the horizontal slide rail (2). The sensor is suitable for obtaining the swing direction of the lifting device (4) in real time; The controller is connected to the drive unit (6) and the sensor. When the lifting device (4) swings, the controller is adapted to obtain the swing direction of the lifting device (4) in real time through the sensor, and control the lifting pulley (1) to move in the opposite direction to the swing direction of the lifting device (4) in real time through the drive unit (6).

2. The anti-sway structure for containers according to claim 1, characterized in that, The drive component (6) is a planetary lead screw.

3. The anti-sway structure for containers according to claim 1, characterized in that, The sensor is a gyroscope, which is installed on the lifting device (4); the gyroscope is suitable for real-time monitoring of the angle change of the lifting device (4) and thus knowing the swing direction of the lifting device (4).

4. The anti-sway structure for containers according to claim 1, characterized in that, The sensor is a force sensor, which is installed on both sides of the lifting wire rope (3) wrapped around the lifting pulley (1). The direction of the swing of the lifting device (4) is determined based on the magnitude of the force exerted on the lifting wire rope (3) on both sides.

5. The anti-sway structure for containers according to claim 4, characterized in that, When the force on one side of the hoisting wire rope (3) is less than the force on the same side of the hoisting wire rope (3) in a static state, the lifting device (4) will sway to that side.

6. The anti-sway structure for containers according to any one of claims 1-5, characterized in that, Also includes: A buffer mechanism is provided between the pulley frame (7) and the quay crane (10); the quay crane (10) is adapted to drive the pulley frame (7) and the lifting pulley (1) to move in the horizontal slide (2), thereby driving the spreader (4) and the container (5) to move.

7. The anti-sway structure for containers according to claim 6, characterized in that, The buffer mechanism includes a rubber spring (8) and a damper (9) connected in parallel.

8. The anti-sway structure for containers according to claim 7, characterized in that, Select a rubber spring (8) with appropriate stiffness based on the weight and frequency characteristics of the spreader (4) and container (5), and adjust the damping value using the damper (9) so that the damping value of the buffer mechanism reaches the critical damping state.

9. The anti-sway structure for containers according to any one of claims 1-5, characterized in that, The lifting pulleys (1) are a plurality of those spaced along the horizontal slide rail (2), and the lifting wire rope (3), the drive unit (6) and the sensor are a plurality of those corresponding to the lifting pulleys (1).

10. A container quay crane, characterized in that, include: The anti-sway structure for containers according to any one of claims 1-9.

Images