Load center leveling device for remote control of port container crane

Abstract

The present application relates to the technical field of port container crane, and provides a lifting load center leveling device for remote control of a port container crane, which comprises a lifting tool and a lifting wheel; the top end of the lifting tool is provided with a center of gravity leveling mechanism; the center of gravity leveling mechanism comprises an adjusting frame, which is arranged at the top end of the lifting tool; slide rails are fixed at the two sides of the bottom end of the adjusting frame; slide blocks are arranged in the slide rails; the bottom end of the slide blocks is fixed with the top end of the lifting tool; and a mounting frame is arranged at the middle position of the top end of the adjusting frame. The present application completes passive preliminary center of gravity correction through a mechanical hydraulic structure, and then completes accurate secondary leveling through an electrically controlled intelligent dynamic inclination sensor, so that the adjusting frame and the lifting tool always maintain a horizontal stress state, the problems of inclination of the lifting tool and uneven stress caused by uneven loading of container goods are completely solved, major safety accidents such as overload fracture of steel wire rope, shaking and deviation of containers, and falling are effectively avoided, and the lifting safety and operation efficiency are greatly improved through mutual cooperation of the two-stage leveling mode.

Description

Technical Field

[0001] This invention relates to the field of port container crane technology, and in particular to a load center of gravity leveling device for remote control of port container cranes. Background Technology

[0002] Port container cranes, also known as quay container cranes or quay cranes, are the core equipment used in modern container terminals for loading and unloading containers from ships. Their typical structure includes a tall gantry, a horizontally extending main beam, a lifting trolley that can move laterally along the main beam, and a container spreader suspended below the trolley by wire ropes. During operation, the lifting trolley moves the spreader above the container, and the spreader is locked to the container corner fittings through the four corner pin mechanisms. Then, the lifting mechanism rewinds the wire rope to lift the container away from the ship or truck. Finally, the container is transported to the designated location by the lateral movement of the trolley and the travel of the main trolley of the entire machine. As the terminal actuator that directly grabs and carries containers, the performance of container spreaders directly determines the efficiency and safety of loading and unloading operations. Ideally, the center of gravity of the container should be directly below the geometric center of the spreader. At this time, the four lifting wire ropes are evenly stressed, the spreader and the container maintain a horizontal posture, and the lifting and lateral movement are smooth. However, in actual operations, the distribution of cargo inside the container is often uneven. For example, heavy cargo is biased to one side and light cargo is piled on the other side, causing the actual center of gravity of the container to deviate from the center of the spreader. When the spreader lifts such an eccentric container, the center of gravity shift will generate an eccentric moment, forcing the spreader to tilt to the heavier side. In the tilted state, the weight distribution of the spreader and the container is uneven, some wire ropes are overloaded, which may cause wire rope breakage or damage to the spreader structure. In severe cases, it may even lead to the risk of the container falling. Therefore, a lifting center of gravity leveling device for remote control of port container cranes is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a lifting center of gravity leveling device for remote control of port container cranes, in order to solve the problem that in actual operation, heavy cargo is biased to one side and light cargo is piled up on the other side, causing the actual center of gravity of the container to deviate from the center of the spreader. When the spreader lifts such an eccentric container, the center of gravity shift will generate an eccentric torque, forcing the spreader to tilt to the heavier side. In the tilted state, the weight distribution of the spreader and the container is uneven, some wire ropes are overloaded, which may cause wire rope breakage or damage to the spreader structure, and in severe cases, even cause the container to fall.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a load center of gravity leveling device for remote control of port container cranes, including a spreader and a lifting wheel; The top of the lifting device is equipped with a center of gravity leveling mechanism; The center of gravity leveling mechanism includes an adjusting frame, which is disposed at the top of the lifting device. Slide rails are fixed on both sides of the bottom end of the adjusting frame. A slider is disposed inside the slide rail. The bottom end of the slider is fixed to the top end of the lifting device. An mounting frame is disposed at the middle position of the top end of the adjusting frame. Take-up rollers are installed on both sides inside the mounting frame. A rotating gear is disposed on the outer side of one end of the take-up roller. A synchronizing gear is disposed at the middle position of one side of the mounting frame. A worm gear is disposed on one side of the synchronizing gear. A worm is disposed at the top end of the worm gear.

[0005] Preferably, the lifting device is provided with fixed frames on both sides, and guide wheel frames are provided at the middle position of the top two sides of the adjusting frame. A steel wire rope is provided on the outside of the fixed frame, and one end of the steel wire rope passes through the outside of the guide wheel frame and is fixed to the outside of the winding roller. Two sets of winding rollers are provided, and the two sets of winding rollers are symmetrically distributed inside the mounting frame.

[0006] Preferably, the top of the adjusting frame is provided with casters on both sides and both ends, the top of the lifting device is provided with a counterweight box at one end of the middle position, the counterweight box is provided with a control box on one side, and a dynamic tilt sensor is provided at the middle position of the top of the adjusting frame.

[0007] Preferably, the slider is provided in two sets, and the two sets of sliders are slidably connected inside the slide rail.

[0008] Preferably, the rotating gears are provided in two sets, and the two sets of rotating gears mesh with the synchronizing gears.

[0009] Preferably, the adjustment frame has an internal mounting groove, a fixing plate is provided at the middle position of the mounting groove, a center-of-gravity adjustment plate is hinged at the middle position of the fixing plate, a sliding groove is provided at the top of the center-of-gravity adjustment plate, and a counterweight is provided at the middle position of the sliding groove.

[0010] Preferably, connecting frames are fixed on both sides of the adjusting frame, a water tank is provided at the bottom of the connecting frame, a piston is provided inside the water tank, a connecting rod is provided at the top of the piston, and a hinge seat is provided at the top of the connecting rod.

[0011] Preferably, the water tank is provided in two sets, which are symmetrically distributed inside the installation groove, and a connecting pipe is provided at the middle position of the two sets of water tanks.

[0012] Preferably, the connecting frame is provided in two sets, and the two sets of connecting frames are hinged to the hinge seat.

[0013] Preferably, the bottom end of the counterweight is in contact with the surface inside the groove, and the counterweight and the groove form a sliding connection.

[0014] The lifting center of gravity leveling device for remote control of port container cranes provided by this invention has the following advantages: Equipped with a center-of-gravity leveling mechanism, when the container is unevenly loaded and causes the adjusting frame to tilt, the counterweight can slide autonomously along the chute in the direction of tilt, requiring no manual intervention or electronic control. Furthermore, utilizing the hinged rotation characteristics of the center-of-gravity leveling plate and the fixed plate, it can precisely respond to the gravitational compression of the counterweight. Furthermore, by utilizing the combined structure of multiple water tanks, connecting pipes, and pistons, while one side of the piston is pressurized and pumps water downwards, the other side of the piston simultaneously pumps water upwards, achieving water exchange and replacement across the chambers. This reverses the counterweight weight on the opposite side of the tilting adjustment frame, effectively offsetting the tilt offset of the adjustment frame, quickly correcting the deviation of the lifting center of gravity, effectively improving the problems of container swaying and unstable lifting during container off-center loading, and achieving adaptive initial balance of the lifting center of gravity. Furthermore, by using dynamic tilt sensors to collect the tilt status data of the adjustment frame in real time and transmitting it to the control box, the tilt situation of the hoisting can be monitored dynamically around the clock, enabling immediate detection and adjustment of fault tilt. Furthermore, by driving the worm gear, worm wheel, and synchronous gear transmission through the motor, two sets of rotating gears are driven to operate synchronously, realizing the coordinated operation of the two sets of winding rollers, one winding and one unwinding. The wire rope is precisely pulled to drive the lifting device to move and finely adjust at the bottom of the adjusting frame. This can accurately correct the tilt angle of the lifting device, make up for the minor deviations in the initial mechanical leveling, and greatly improve the overall leveling accuracy.

[0015] Furthermore, the mechanical hydraulic structure completes the initial passive center of gravity correction, and the electronically controlled intelligent dynamic tilt sensor completes the precise secondary leveling. This dual protection ensures that the adjustment frame and spreader always maintain a horizontal stress state, completely solving the problems of spreader tilting and uneven stress caused by uneven loading of container cargo. It effectively avoids major safety accidents such as wire rope overload breakage, container swaying and deviation, and falling. The two-stage leveling mode works together to greatly improve the safety and efficiency of lifting operations. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention viewed from below; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention, shown in a partial cross-section. Figure 4 This is a frontal three-dimensional structural schematic diagram of the center-of-gravity leveling mechanism of the present invention; Figure 5 This is a three-dimensional structural diagram of the center-of-gravity leveling mechanism of the present invention, showing a partial explosion. Figure 6 This is a partial, exploded three-dimensional structural diagram of the center-of-gravity leveling mechanism of the present invention; Figure 7 This is a top-view three-dimensional structural diagram of the present invention; Figure 8 This is a three-dimensional structural schematic diagram of the rear cross-section of the adjustment frame of the present invention; Figure 9 This is a frontal three-dimensional structural diagram of the center-of-gravity adjusting plate of the present invention; Figure 10 This is a three-dimensional structural diagram of the center-of-gravity adjusting plate of the present invention, viewed from below.

[0017] The following are the annotations in the diagram: 1. Lifting device; 2. Center of gravity leveling mechanism; 201. Adjusting frame; 202. Wire rope; 203. Slide rail; 204. Slider; 205. Fixing frame; 206. Guide wheel frame; 207. Mounting frame; 208. Winding roller; 209. Rotary gear; 2010. Worm gear; 2011. Worm; 2012. Synchronizing gear; 2013. Mounting groove; 2014. Water tank; 2015. Connecting rod; 2016. Hinge seat; 2017. Connecting frame; 2018. Center of gravity leveling plate; 2019. Counterweight; 2020. Slide groove; 2021. Piston; 2022. Connecting pipe; 2023. Fixing plate; 3. Lifting wheel; 4. Counterweight box; 5. Control box; 6. Dynamic tilt sensor. Detailed Implementation

[0018] 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, and 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.

[0019] Please see Figures 1-10 The present invention provides a lifting center of gravity leveling device for remote control of port container cranes, which includes a spreader 1 and a lifting wheel 3; The top of the lifting device 1 is equipped with a center of gravity leveling mechanism 2.

[0020] Reference Figures 1-10As shown, the adjusting frame 201 has an internal mounting groove 2013. A fixing plate 2023 is located in the middle of the mounting groove 2013. A center-of-gravity adjusting plate 2018 is hinged to the middle of the fixing plate 2023. A sliding groove 2020 is located at the top of the center-of-gravity adjusting plate 2018. A counterweight 2019 is located in the middle of the sliding groove 2020. Connecting frames 2017 are fixed to both sides of the adjusting frame 201. A water tank 2014 is located at the bottom of the connecting frame 2017. A piston 2021 is located inside the water tank 2014. A connecting rod 2015 is provided at the top of the 1, and a hinge seat 2016 is provided at the top of the connecting rod 2015; two sets of water tanks 2014 are provided, and the two sets of water tanks 2014 are symmetrically distributed inside the mounting groove 2013, and a connecting pipe 2022 is provided at the middle position of the two sets of water tanks 2014; two sets of connecting frames 2017 are provided, and the two sets of connecting frames 2017 are hinged to the hinge seat 2016; the bottom end of the counterweight 2019 is in contact with the inner surface of the slide 2020, and a sliding connection is formed between the counterweight 2019 and the slide 2020; During the lifting operation of containers at the port, the overall lifting operation of the container is mainly completed by the spreader 1. When the spreader 1 is lifting the container, if the cargo inside the container is not stacked evenly, and heavy cargo is concentrated on one side while light cargo is piled on the other side, the overall center of gravity of the container will shift, which will cause the spreader 1 and the matching adjustment frame 201 to tilt. When the adjusting frame 201 tilts as a whole, the counterweight 2019 installed inside the adjusting frame 201 will slide autonomously along the slide groove 2020 in the direction of the tilt of the lifting device 1. The slide groove 2020 is pre-filled with special lubricating oil, which can effectively reduce the friction between the counterweight 2019 and the inner wall of the slide groove 2020 during the sliding process, ensuring that the counterweight 2019 slides smoothly without jamming. Because the center-of-gravity adjusting plate 2018 and the fixed plate 2023 are connected by a hinge, they have the characteristic of flexible rotation. Therefore, during the tilting and sliding process, the counterweight 2019 can continuously press one side of the center-of-gravity adjusting plate 2018 with its own weight, causing the pressure side of the center-of-gravity adjusting plate 2018 to tilt downward. The hinge structure between the center-of-gravity adjusting plate 2018 and the fixed plate 2023 ensures that the center-of-gravity adjusting plate 2018 can rotate flexibly and accurately respond to the gravity pressing of the counterweight 2019. At the same time, through the linkage transmission of the connecting frame 2017, the hinge seat 2016, and the connecting rod 2015, the slight tilt displacement can be accurately transmitted to the piston 2021, realizing the precise control of the hydraulic counterweight. The transmission is smooth and without lag, and the stability of the center-of-gravity adjustment is excellent. When the center of gravity adjustment plate 2018 tilts downward on one side, the connecting rod 2015 can be steadily pushed downward in a straight line through the hinged connection between the connecting frame 2017 and the hinge seat 2016. As the connecting rod 2015 continues to move downward, it will directly squeeze the piston 2021 at the bottom to move downward synchronously, thereby squeezing and transporting the water stored in the corresponding water tank 2014 to the water tank 2014 on the other side through the connecting pipe 2022. While one set of pistons 2021 is pressing down to deliver water, the other set of pistons 2021 on the other side of the equipment moves upward simultaneously to complete the pumping action. This reverses the overall counterweight on the opposite side of the tilting end of the adjusting frame 201, effectively offsetting the tilt offset of the adjusting frame 201. Through the cooperation of the two sets of water tanks 2014, connecting pipes 2022 and pistons 2021, the two-way linkage mode of one piston 2021 pressing down to deliver water and the other piston 2021 pumping water upward is used to reverse the counterweight on the opposite side of the tilting adjusting frame 201, effectively offsetting the tilt offset of the equipment, quickly correcting the deviation of the lifting center of gravity, reducing problems such as unstable lifting and container swaying caused by uneven container lifting, and thus completing the initial adjustment work of adaptive center of gravity.

[0021] Reference Figures 1-10 As shown, the center of gravity leveling mechanism 2 includes an adjusting frame 201, which is set at the top of the lifting device 1. Slide rails 203 are fixed on both sides of the bottom end of the adjusting frame 201. A slider 204 is set inside the slide rail 203. The bottom end of the slider 204 is fixed to the top end of the lifting device 1. An installation frame 207 is set at the middle position of the top end of the adjusting frame 201. A winding roller 208 is installed on both sides inside the installation frame 207. A rotating gear 209 is set on the outer side of one end of the winding roller 208. A synchronous gear 2012 is set at the middle position of one side of the installation frame 207. A worm gear 2010 is set on one side of the synchronous gear 2012. A worm 2011 is set at the top of the worm gear 2010. The lifting device 1 is provided with fixed frames 205 on both sides. The guide wheel frame 206 is provided at the middle position of the top two sides of the adjusting frame 201. The fixed frame 205 is provided with a wire rope 202. One end of the wire rope 202 passes through the outside of the guide wheel frame 206 and is fixed to the outside of the winding roller 208. There are two sets of winding rollers 208. The two sets of winding rollers 208 are symmetrically distributed inside the mounting frame 207. The top of the adjusting frame 201 is equipped with two wheels 3 on both sides and at both ends. The top of the lifting device 1 is equipped with a counterweight box 4 at one end in the middle position. The counterweight box 4 is equipped with a control box 5 on one side. The top of the adjusting frame 201 is equipped with a dynamic tilt sensor 6 in the middle position. There are two sets of sliders 204, and the two sets of sliders 204 are slidably connected inside the slide rail 203. There are two sets of rotating gears 209, and the two sets of rotating gears 209 mesh with the synchronous gear 2012.

[0022] When the adjusting frame 201 tilts downwards on one side, the dynamic tilt sensor 6 can detect the tilt change of the adjusting frame 201 in real time. The dynamic tilt sensor 6 transmits the collected tilt data to the control box 5 in real time. After receiving the tilt data signal, the control box 5 starts the drive motor, which drives the worm gear 2011 to rotate. During the rotation of the worm gear 2011, the worm wheel 2010 rotates synchronously. At the same time, the worm wheel 2010 rotates and drives the synchronous gear 2012 to rotate. When the synchronous gear 2012 rotates, it drives the rotating gear 209 on the upward tilting side of the adjusting frame 201 to rotate. During the rotation of the rotating gear 209, the winding roller 208 performs the winding operation of the wire rope 202. While the winding roller 208 is winding the wire rope 202, the lifting device 1 is pulled towards the adjusting frame 201 via the wire rope 202. 01. Moving in an upward tilting direction, due to the configuration of two sets of rotating gears 209, and the two sets of rotating gears 209 can maintain synchronous rotation, so that while one set of winding rollers 208 winds up the wire rope 202, the other set of winding rollers 208 simultaneously performs wire unwinding operations, thereby driving the lifting device 1 to perform position translation adjustment at the bottom of the adjusting frame 201. During the movement and adjustment process, the lifting device 1 will simultaneously drive the slider 204 to slide inside the slide rail 203. Through the cooperation between the slide rail 203 and the slider 204, the movement process of the lifting device 1 can play a precise guiding and limiting role, effectively improving the overall stability of the lifting device 1 during the displacement process, avoiding the problems of deviation and swaying. As the lifting device 1 continues to move and adjust, the center of gravity position of the lifting device 1 at the bottom of the adjusting frame 201 can be changed in real time, and the tilt angle of the lifting device 1 can be precisely adjusted and corrected. When the dynamic tilt sensor 6 detects in real time that the adjusting frame 201 has returned to a horizontal state, the equipment immediately stops the winding and unwinding operations, and completes the fully automatic center of gravity leveling of the spreader 1. This can effectively avoid safety accidents such as rope breakage due to overload and container falling caused by the container tilting during the lifting of the container by the spreader 1, greatly improving the safety and stability of container lifting operations and accurately completing the overall center of gravity leveling operation.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A load center leveling device for remote control of a port container crane, comprising a spreader (1) and a jack (3); Its features are: The top of the lifting device (1) is provided with a center of gravity leveling mechanism (2); The center of gravity leveling mechanism (2) includes an adjustment frame (201), which is located at the top of the lifting device (1). Slide rails (203) are fixed on both sides of the bottom end of the adjustment frame (201). A slider (204) is provided inside the slide rail (203). The bottom end of the slider (204) is fixed to the top end of the lifting device (1). An installation frame (207) is provided at the middle position of the top end of the adjustment frame (201). A take-up roller (208) is installed on both sides inside the installation frame (207). A rotating gear (209) is provided on the outer side of one end of the take-up roller (208). A synchronous gear (2012) is provided at the middle position of one side of the installation frame (207). A worm gear (2010) is provided on one side of the synchronous gear (2012). A worm (2011) is provided at the top end of the worm gear (2010).

2. The load center of gravity leveling device for remote control of a port container crane according to claim 1, characterized in that: The lifting device (1) is provided with fixed frames (205) on both sides. The middle position of the top two sides of the adjusting frame (201) is provided with guide wheel frame (206). The outside of the fixed frame (205) is provided with wire rope (202). One end of the wire rope (202) passes through the outside of the guide wheel frame (206) and is fixed to the outside of the winding roller (208). There are two sets of winding roller (208). The two sets of winding roller (208) are symmetrically distributed inside the mounting frame (207).

3. The load center of gravity leveling device for remote control of a port container crane according to claim 1, characterized in that: The top of the adjusting frame (201) is provided with two wheels (3) on both sides and at both ends. The top of the lifting device (1) is provided with a counterweight box (4) at one end in the middle position. The counterweight box (4) is provided with a control box (5) on one side. The top of the adjusting frame (201) is provided with a dynamic tilt sensor (6).

4. The load center of gravity leveling device for remote control of a port container crane according to claim 1, characterized in that: The slider (204) is provided in two sets, and the two sets of sliders (204) are slidably connected inside the slide rail (203).

5. The load center of gravity leveling device for remote control of a port container crane according to claim 1, characterized in that: The rotating gear (209) is provided in two sets, and the two sets of rotating gears (209) mesh with the synchronous gear (2012).

6. The load center of gravity leveling device for remote control of a port container crane according to claim 1, characterized in that: The adjustment frame (201) has an internal mounting groove (2013). A fixing plate (2023) is provided at the middle position of the mounting groove (2013). A center-of-gravity adjustment plate (2018) is hinged at the middle position of the fixing plate (2023). A sliding groove (2020) is provided at the top of the center-of-gravity adjustment plate (2018). A counterweight (2019) is provided at the middle position of the sliding groove (2020).

7. The load center of gravity leveling device for remote control of a port container crane according to claim 6, characterized in that: The adjusting frame (201) is fixed with connecting frames (2017) on both sides. A water tank (2014) is provided at the bottom of the connecting frame (2017). A piston (2021) is provided inside the water tank (2014). A connecting rod (2015) is provided at the top of the piston (2021). A hinge seat (2016) is provided at the top of the connecting rod (2015).

8. The load center of gravity leveling device for remote control of a port container crane according to claim 7, characterized in that: The water tank (2014) is provided in two sets, and the two sets of water tanks (2014) are symmetrically distributed inside the mounting groove (2013). A connecting pipe (2022) is provided at the middle position of the two sets of water tanks (2014).

9. The load center of gravity leveling device for remote control of a port container crane according to claim 7, characterized in that: The connecting frame (2017) is provided in two sets, and the two sets of connecting frames (2017) are hinged to the hinge seat (2016).

10. The load center of gravity leveling device for remote control of a port container crane according to claim 6, characterized in that: The bottom end of the counterweight (2019) is in contact with the surface inside the slide (2020), and the counterweight (2019) and the slide (2020) form a sliding connection.

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