Lightweight multifunctional container portal crane

Abstract

The invention provides a lightweight multifunctional container portal crane which comprises a portal frame and a container, the upper portion of the portal frame is connected with a lifting appliance through a lifting mechanism, the lifting mechanism is installed on a trolley on the portal frame, and the lifting appliance is connected with the top of the container through a spin lock; a pair of mounting seats is fixed on each of the two sides of the lifting appliance at intervals, a sliding groove is formed in one side of each mounting seat, a movable seat is arranged in each sliding groove in a sliding manner, a side bracket is fixed on one side of each movable seat, and two guide rollers are movably arranged between each side bracket and the corresponding movable seat; a steel wire lifting rope is arranged between the two guide rollers, the top of the steel wire lifting rope is connected with a winch system installed on the portal frame, and a lifting hook is installed at the bottom of the steel wire lifting rope. A pair of lifting rings is fixed to each of the two sides of the container, the lifting rings are used in cooperation with the lifting hooks, and the problems that an existing portal crane is poor in operation stability and weak in wind resistance and shake prevention capacity are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cranes, in particular to a lightweight multifunctional container gantry crane. BACKGROUND

[0002] In the field of modern logistics and port transportation, the container gantry crane is the core equipment for realizing efficient transfer of containers, and its performance directly affects the operation efficiency, operation cost and safety level of the logistics hub. With the continuous growth of global trade volume, the demand for cranes in port, yard and other scenarios is becoming increasingly demanding, and the traditional container gantry crane gradually exposes many technical shortcomings, which is difficult to adapt to the current efficient, low-carbon and intelligent operation demand.

[0003] In the existing container lifting and transfer process, affected by factors such as wind force, lifting speed fluctuation, trolley running inertia, etc., it is easy to produce lateral or longitudinal shaking, especially in the complex wind load environment of open port, the shaking amplitude can reach 15-30cm. The spreader of the traditional crane is only connected with the container through the top spin lock, and the single-point fixing structure is difficult to resist external interference, and the shaking not only leads to the difficulty of container positioning, and the operator needs to adjust the position repeatedly, the single positioning time is prolonged to 2-5 minutes, which seriously affects the operation efficiency, and may also cause safety hazards such as container collision and rope wear. According to industry statistics, the equipment failure caused by container shaking accounts for 25%-30% of the total failure of the crane, and the direct economic loss caused by it exceeds ten million yuan per year.

[0004] Therefore, it is necessary to provide a new lightweight multifunctional container gantry crane to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a lightweight multifunctional container gantry crane, which solves the problem of poor operation stability, weak wind resistance and anti-shaking ability of the existing gantry crane.

[0006] The lightweight multifunctional container gantry crane provided by the present application comprises a portal frame and a container, a spreader is connected to the portal frame through a lifting mechanism, the lifting mechanism is installed on a trolley on the portal frame, and the spreader is connected to the top of the container through a spin lock; A pair of mounting seats are fixed on both sides of the spreader, a sliding groove is formed on one side of the mounting seat, a moving seat is slidably arranged in the sliding groove, a side bracket is fixed to one side of the moving seat, and two guide rollers are movably arranged between the side bracket and the moving seat; A steel wire rope is arranged between the two guide rollers, the top of the steel wire rope is connected with a winch system installed on the portal frame, and a hook is installed at the bottom of the steel wire rope. The container is fixed with a pair of lifting rings on both sides, which are used in cooperation with the lifting hooks.

[0007] In a preferred embodiment, a plurality of said sliding grooves are movably provided with adjusting lead screws, said adjusting lead screws penetrating said moving seat and being threadedly connected therewith, and the thread rotation directions of a pair of said adjusting lead screws on the same side of said lifting appliance are opposite. Each pair of said adjusting lead screws are fixedly connected through connecting shafts.

[0008] In a preferred embodiment, a first bevel gear is mounted on each of said connecting shafts, a transmission shaft is movably provided on said lifting appliance through a bearing, a second bevel gear is mounted on both ends of said transmission shaft, and two said second bevel gears are respectively engaged with two said first bevel gears.

[0009] In a preferred embodiment, a side seat is fixed on one side of said lifting appliance, a rotating shaft is movably provided on said side seat, a third bevel gear is mounted on said connecting shaft, a motor is mounted on said lifting appliance, and the top of said rotating shaft is connected with the output end of said motor through a shaft coupling. A fourth bevel gear is mounted on the bottom of said rotating shaft, and said fourth bevel gear is engaged with said third bevel gear.

[0010] In a preferred embodiment, said first bevel gear and second bevel gear, and said third bevel gear and fourth bevel gear all adopt closed transmission, and four said adjusting lead screws are all galvanized.

[0011] In a preferred embodiment, said portal main girder adopts Q460 high-strength steel, and the leg is of trapezoidal cross-section structure. A weight sensor is integrated at the top swivel lock of said lifting appliance, a tungsten steel wear-resistant coating is provided on the inner wall of the sliding groove of said mounting seat, and the surface of said guide roller is wrapped with a polyurethane elastic layer. It also includes an intelligent control system, which takes Siemens S7-200PLC as the core, connects the weight sensor, laser ranging sensor, high-definition camera and touch screen, and realizes weighing protection, automatic alignment and remote monitoring.

[0012] In a preferred embodiment, said intelligent control system includes an overload protection module, said overload protection module collects the lifting weight through the weight sensor, when the weight is ≥36t, the PLC cuts off the power supply of the hoisting mechanism, triggers the sound-light alarm, and displays the overload information on the touch screen.

[0013] In a preferred embodiment, said intelligent control system includes an automatic alignment module, said automatic alignment module detects the alignment deviation through two laser ranging sensors at the bottom of said lifting appliance, when the transverse or longitudinal deviation is >5mm, the PLC adjusts the speed of the trolley to control the deviation within ±2mm.

[0014] In a preferred embodiment, the intelligent control system comprises a remote monitoring module, which transmits live pictures to the central control room through the high-definition camera, the high-definition camera covers the main girder of the portal, the trolley, the lifting appliance and the operation area, and the picture delay is ≤200ms. The touch screen displays the lifting height, running speed, motor temperature parameters in real time, supports fault code query and maintenance suggestion push.

[0015] The beneficial effects of the present application are: 1. The main girder of the portal adopts Q460 high-strength steel, compared with the traditional Q345 steel, the material strength is improved by about 35% under the same bearing capacity (both can meet the 36t safe lifting weight), the main girder section size can be reduced by 25%-30%, and the weight of a single main girder is reduced by 40%-45%; At the same time, the leg adopts a trapezoidal cross-sectional structure, compared with the traditional rectangular cross-section, the material consumption is reduced by 20%-25% under the premise of ensuring bending and torsional properties. Overall, the overall weight of the machine is reduced by 30%-35% compared with the traditional machine type, for example, the overall weight of the 40-foot container crane is reduced from 220t to 143-154t, which greatly reduces the pressure on the operation site foundation.

[0016] 2. Compared with the single structure of the traditional lifting appliance which only fixes the container through the top spin lock, the device adds a connection mode of side hooks and lifting rings, forming a two-way fixing system of "top spin lock plus two side hooks". During the transfer process, the two side hooks apply an upward tension to the container through the steel wire rope, which can offset the lateral shaking caused by external forces such as wind and inertia, greatly reducing the shaking amplitude and positioning difficulty.

[0017] 3. The inner wall of the sliding groove of the mounting seat is provided with a tungsten steel wear-resistant coating, the hardness of tungsten steel is as high as HRC65-70, and the wear resistance is 5-8 times that of traditional steel, so the service life of the moving seat and the sliding groove is greatly increased. The polyurethane elastic layer wrapped on the surface of the guide roller not only can buffer the tension fluctuation of the steel wire rope, but also can avoid the rigid friction between the wire rope and the guide roller, and at the same time reduce the operation noise.

[0018] 4. The overload protection module in the intelligent control system monitors the lifting weight in real time through the weight sensor, when the weight ≥36t, the power supply of the lifting mechanism is immediately cut off and the sound and light alarm is triggered, to avoid accidents such as damage of the lifting mechanism, breaking of the steel wire rope caused by overload; The automatic positioning module realizes high-precision positioning of ±2mm through the laser ranging sensor, compared with the 10mm deviation of the traditional manual positioning, the accuracy is greatly improved, which can effectively avoid problems such as spin lock damage, container collision caused by positioning deviation.

[0019] 5. The distance between the hooks on both sides of the spreader can be flexibly adjusted by driving the adjusting screw with a motor. It can be adapted to standard containers such as 20-foot and 40-foot containers, as well as some non-standard sized containers (such as 30-foot special containers). There is no need to change the spreader, which greatly enhances the versatility of the equipment. It is especially suitable for yard scenarios where multiple container sizes are mixed. Attached Figure Description

[0020] Figure 1 A perspective view of the lightweight, multi-functional container gantry crane spreader provided by the present invention; Figure 2 for Figure 1 A magnified structural diagram of A is shown below; Figure 3 for Figure 1 A schematic diagram of the enlarged structure of B shown; Figure 4 A top view of the lightweight, multi-functional container gantry crane spreader provided by the present invention; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of C shown; Figure 6 The main structural front view of the lightweight multi-functional container gantry crane provided by the present invention.

[0021] The following are the labeling elements in the diagram: 1. Gantry; 2. Lifting mechanism; 3. Lifting device; 4. Mounting seat; 5. Slide rail; 6. Moving seat; 7. Side support; 8. Guide roller; 9. Wire rope; 10. Hook; 11. Container; 12. Lifting ring; 13. Adjusting screw; 14. Connecting shaft; 15. First bevel gear; 16. Drive shaft; 17. Second bevel gear; 18. Side seat; 19. Rotating shaft; 20. Third bevel gear; 21. Motor; 22. Fourth bevel gear. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 ,in Figure 1 A perspective view of the lightweight, multi-functional container gantry crane spreader provided by the present invention; Figure 2 for Figure 1 A magnified structural diagram of A is shown below; Figure 3 for Figure 1 A schematic diagram of the enlarged structure of B shown; Figure 4 A top view of the lightweight, multi-functional container gantry crane spreader provided by the present invention;Figure 5 For Figure 4 The enlarged structural schematic view of C is shown in the figure. Figure 6 The main structure front view of the lightweight multifunctional container gantry crane provided by the application.

[0024] In the specific implementation process, as Figures 1-6 shown, including portal frame 1 and container 11, the portal frame 1 is connected with a lifting tool 3 through a lifting mechanism 2 above the portal frame 1, the lifting mechanism 2 is installed on a trolley on the portal frame 1, the lifting tool 3 is connected with the top of the container 11 through a twist lock; a pair of mounting seats 4 are fixed at intervals on both sides of the lifting tool 3, a sliding groove 5 is formed on one side of the mounting seat 4, a plurality of adjusting lead screws 13 are movably arranged in the sliding groove 5, the adjusting lead screws 13 penetrate through a moving seat 6 and are threadedly connected with the moving seat 6, the thread rotation directions of the adjusting lead screws 13 on the same side of the lifting tool 3 are opposite; the adjusting lead screws 13 are fixedly connected through a connecting shaft 14. The first bevel gears 15 are installed on the two connecting shafts 14, the transmission shaft 16 is movably arranged on the lifting tool 3 through a bearing, the second bevel gears 17 are installed at both ends of the transmission shaft 16, and the two second bevel gears 17 are meshed with the two first bevel gears 15, respectively.

[0025] A side seat 18 is fixed on one side of the lifting tool 3, a rotating shaft 19 is movably arranged on the side seat 18, a third bevel gear 20 is installed on the connecting shaft 14, a motor 21 is installed on the lifting tool 3, and the rotating shaft 19 is connected with the output end of the motor 21 through a shaft coupling; a fourth bevel gear 22 is installed at the bottom of the rotating shaft 19, and the fourth bevel gear 22 is meshed with the third bevel gear 20. When the motor 21 is started, the four adjusting lead screws 13 are rotated under the transmission of the first bevel gears 15 and the second bevel gears 17 and the third bevel gears 20 and the fourth bevel gears 22, and the two moving seats 6 are close to or away from each other because the thread rotation directions of the two adjusting lead screws 13 on the same side are opposite.

[0026] The first bevel gears 15 and the second bevel gears 17 and the third bevel gears 20 and the fourth bevel gears 22 are all closed transmission, and the four adjusting lead screws 13 are all galvanized to reduce wear and improve the service life of the parts.

[0027] The moving seat 6 is slidably arranged in the sliding groove 5, the side support 7 is fixed on one side of the moving seat 6, and the two guide rollers 8 are movably arranged between the side support 7 and the moving seat 6; the steel wire sling 9 is arranged between the two guide rollers 8, the top of the steel wire sling 9 is connected with a winch system installed on the portal frame 1, and the hook 10 is installed at the bottom of the steel wire sling 9; a pair of lifting rings 12 are fixed on both sides of the container 11, and the lifting rings 12 are used in cooperation with the hook 10.

[0028] The main beam of the portal frame 1 is made of Q460 high-strength steel, and the supporting leg is a trapezoidal cross-section structure; the weight sensor is integrated at the top rotary lock of the lifting appliance 3, the inner wall of the sliding groove 5 of the mounting seat 4 is provided with a tungsten steel wear-resistant coating, and the surface of the guide roller 8 is wrapped with a polyurethane elastic layer; the intelligent control system is also included, which takes Siemens S7-200PLC as the core, connects the weight sensor, the laser ranging sensor, the high-definition camera and the touch screen, and realizes the weighing protection, the automatic alignment and the remote monitoring. The intelligent control system includes an overload protection module, which collects the lifting weight through the weight sensor, and when the weight is greater than or equal to 36t, the PLC cuts off the power supply of the lifting mechanism 2, triggers the sound-light alarm, and displays the overload information on the touch screen. The intelligent control system includes an automatic alignment module, which detects the alignment deviation through the two laser ranging sensors at the bottom of the lifting appliance 3, and when the horizontal or vertical deviation is greater than 5mm, the PLC adjusts the trolley running speed to control the deviation within ±2mm.

[0029] The intelligent control system includes a remote monitoring module, which transmits the live picture to the central control room through the high-definition camera, the high-definition camera covers the main beam of the portal frame 1, the trolley, the lifting appliance 3 and the working area, and the picture delay is less than or equal to 200ms; the touch screen displays the lifting height, the running speed, the motor temperature parameters in real time, supports the fault code query and the maintenance suggestion pushing.

[0030] During the equipment starting stage, the operator starts the equipment through the touch screen in the central control room, and the intelligent control system (taking Siemens S7-200PLC as the core) automatically enters the initialization mode: first, the system performs self-checking on each key component, including the running state of the lifting mechanism motor 21, the transmission flexibility of the adjusting screw rod 13, the signal stability of the weight sensor and the laser ranging sensor, and the picture transmission quality of the high-definition camera. If it is detected that the component is abnormal (such as the motor temperature exceeding 80℃, the sensor signal interruption), the system immediately displays the fault code (such as “E01-motor overheating” “E05-laser sensor fault”) on the touch screen, and pushes the maintenance suggestion (such as “check the motor cooling fan, clean the cooling channel”), while cutting off the power supply of the corresponding component to prevent the fault from expanding; if the self-checking is passed, the system enters the standby state, and the touch screen displays the current lifting height (the initial value is 0), the trolley running speed (the initial value is 0), the environmental wind speed (connected through the external wind speed sensor) and other parameters in real time.

[0031] When the container 11 to be transferred enters the working area, the operator inputs the container specification through the touch screen, and the system automatically calculates the target distance between the two hooks 10 on both sides of the spreader 3 according to the preset parameters. Then, the PLC sends a control signal to the motor 21, and the motor 21 drives the rotating shaft 19 to rotate through the shaft coupling. The fourth bevel gear 22 at the bottom of the rotating shaft 19 meshes with the third bevel gear 20 on the connecting shaft 14, and the power is transmitted to the connecting shaft 14. Since the connecting shaft 14 is connected to the two adjusting lead screws 13 on the same side, and the threads of the two adjusting lead screws 13 on the same side are opposite (for example, the left adjusting lead screw 13 is left-handed thread, and the right adjusting lead screw 13 is right-handed thread), when the connecting shaft 14 rotates, the two adjusting lead screws 13 will rotate synchronously and reversely.

[0032] The adjusting lead screw 13 penetrates the moving seat 6 and is threadedly connected thereto. The reverse rotation of the thread causes the moving seat 6 to move in opposite directions or in the same direction along the sliding groove 5 of the mounting seat 4. When a 40-foot container needs to be adapted, the moving seat 6 moves in opposite directions to increase the distance between the two hooks 10. When a 20-foot container needs to be adapted, the moving seat 6 moves in the same direction to reduce the distance between the hooks. In this process, the tungsten steel wear-resistant coating on the inner wall of the sliding groove 5 reduces the friction coefficient between the moving seat 6 and the sliding groove, and the wear amount is reduced by 60%-70% compared with the traditional design without coating. At the same time, the first bevel gear 15 on the connecting shaft 14 meshes with the second bevel gear 17 at both ends of the transmission shaft 16, so that the two connecting shafts 14 rotate synchronously, ensuring that the adjustment accuracy of the moving seats 6 on both sides of the spreader 3 is consistent, and avoiding the deviation of the hooks 10. When the hooks 10 move to the position directly below the lifting lugs 12 on both sides of the container, the laser ranging sensor detects that the alignment deviation is ≤2mm, and the system sends a stop signal to the motor 21, and the adjustment stage ends.

[0033] After the hook 10 is aligned with the lifting ring 12, the PLC controls the hoist system on the gantry 1 to start, and the permanent magnet synchronous motor in the hoist system drives the winding drum to rotate, releasing the steel wire rope 9, so that the hook 10 is lowered and connected with the lifting ring 12. The steel wire rope 9 passes between the two guide rollers 8, and the polyurethane elastic layer wrapped on the surface of the guide roller can buffer the tension fluctuation of the wire rope, reduce the wear of the wire rope, and avoid the rigid collision between the wire rope and the guide roller to generate noise. When the hook 10 is connected with the lifting ring 12, the hoist system is reversely rotated to tighten the steel wire rope 9 and apply an upward pulling force to the two sides of the container 11; at the same time, the spreader 3 is lowered to the top of the container, and the top rotary lock is automatically inserted into the container lock hole under the control of the PLC, thereby completing the fixation of the top of the container. At this time, the weight sensor at the top rotary lock of the spreader 3 collects the total weight in real time and transmits the data to the overload protection module of the intelligent control system. If the weight is less than the safe carrying limit of the equipment, the system allows the lifting mechanism 2 to start, and the lifting mechanism drives the spreader and the container to slowly rise. The lifting speed is automatically adjusted by the PLC according to the weight, and the speed can reach 0.8-1 m / s when the load is less than 10 t, and the speed is reduced to 0.3-0.5 m / s when the load is 25-36 t, so as to avoid the shaking of the container caused by too fast speed. If the weight is greater than or equal to 36 t, the overload protection module immediately triggers the protection mechanism: the PLC cuts off the power supply of the lifting mechanism 2 to prevent the lifting action from continuing, and at the same time, the audible and visual alarm is started to emit intermittent buzzing and flashing red warning light, and the touch screen displays the word "overload warning!".

[0034] After the container is lifted to the preset height (usually 5-8 m above the ground, to avoid collision with ground obstacles, which is set by the operator through the touch screen), the trolley on the gantry is started under the control of the PLC, driving the spreader and the container to move to the target position (such as a transport truck or a stacking area). During the transfer process, the automatic alignment module continuously works: the two laser ranging sensors (monitoring the horizontal and vertical deviations respectively) at the bottom of the spreader 3 scan the reference point (such as the truck container fixing frame or the stacking location identifier) of the target position in real time, and transmit the deviation data to the PLC. When the horizontal or vertical deviation is greater than 5 mm, the PLC adjusts the running speed of the trolley (such as reducing the speed of the wheels on one side of the deviation direction and keeping the original speed on the other side) for fine adjustment, so as to ensure that the deviation is always controlled within ±2 mm, realizing high-precision alignment.

[0035] At the same time, the remote monitoring module captures the working picture in real time through the high-definition camera, and the camera is installed at the two ends of the main beam of the gantry (1), the top of the trolley, the side of the spreader 3 and the four corners of the working area, covering the complete motion track of the main beam of the gantry 1, the trolley, the spreader and the container. The picture is transmitted to the central control room through industrial Ethernet with a delay of ≤200 ms, and the operator can observe the position state of the container in real time through the touch screen without needing to operate on site in the cab, thereby reducing the risk of high-altitude operation.

[0036] When the container reaches above the target position, the lifting mechanism 2 slowly lowers the container until it is stably landed on the target bearing surface (such as a truck bed, a yard surface). At this time, the laser ranging sensor detects that the container is in contact with the bearing surface, the PLC controls the hoisting system to stop lowering, and then the top of the lifting tool 3 is automatically unlocked, and the hook 10 is separated from the lifting ring 12. The operator controls the trolley to return the lifting tool to the initial position through the touch screen, and the lifting mechanism lowers the lifting tool to the initial height, and the system completes a work cycle. If continuous operation is required, the operator only needs to repeat the above "lifting tool adjustment-container connection-transportation alignment" process.

[0037] The working principle of the present application: When the crane is in use, the operator starts the lifting mechanism to move the lifting tool 3 above the container 11 to be transferred, and the lifting tool 3 and the top of the container 11 are connected together through the visual recognition assembly. Before that, the motor 21 is started while the lifting tool 3 is moving towards the container 11, and the four adjusting lead screws 13 are rotated under the transmission of the first bevel gear 15 and the second bevel gear 17, the third bevel gear 20 and the fourth bevel gear 22. Because the threads on the two adjusting lead screws 13 on the same side are opposite in rotation direction, the two moving seats 6 are close to or away from each other. When the hook 10 moves directly below the lifting ring 12, the permanent magnet synchronous motor in the hoisting system starts to drive the steel wire rope 9 to move upwards until the lifting ring 12 and the hook 10 are connected together, and finally the top of the container 11 and the top of the lifting tool 3 are connected together through the spin lock. Compared with the single structure of the traditional lifting tool which only fixes the container through the top spin lock, the present application adds the connection mode of the side hook 10 and the lifting ring 12, forming a "top spin lock plus two side hooks" two-way fixing system. During transportation, the two side hooks 10 exert an upward pulling force on the container 11 through the steel wire rope 9, which can offset the lateral shaking caused by external forces such as wind and inertia, greatly reducing the shaking amplitude and alignment difficulty.

[0038] The circuit and control involved in the present application are prior art, and will not be described in detail here.

[0039] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the contents of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A lightweight multifunctional container gantry crane comprising a portal (1) and a container (11), characterized in that, The portal frame (1) is connected with a lifting tool (3) through a lifting mechanism (2) above, the lifting mechanism (2) is installed on the trolley on the portal frame (1), the lifting tool (3) is connected with the top of the container (11) through a spin lock; A pair of mounting seats (4) are fixedly arranged on the two sides of the lifting tool (3) at intervals, a sliding groove (5) is formed in one side of the mounting seat (4), a moving seat (6) is slidably arranged in the sliding groove (5), a side support (7) is fixedly arranged on one side of the moving seat (6), two guide rollers (8) are movably arranged between the side support (7) and the moving seat (6); A steel wire sling (9) is arranged between the two guide rollers (8), the top of the steel wire sling (9) is connected with a winch system installed on the portal frame (1), and a lifting hook (10) is arranged at the bottom of the steel wire sling (9); A pair of lifting rings (12) are fixedly arranged on the two sides of the container (11), and the lifting rings (12) are used in cooperation with the lifting hook (10).

2. The lightweight multi-functional container gantry crane according to claim 1, characterized in that, Adjusting lead screws (13) are movably arranged in the sliding grooves (5), the adjusting lead screws (13) penetrate through the moving seat (6) and are screw-connected with the moving seat (6), and the thread directions of the adjusting lead screws (13) on the same side of the lifting tool (3) are opposite; Each pair of adjusting lead screws (13) are fixedly connected through a connecting shaft (14).

3. The lightweight multi-functional container gantry crane according to claim 2, characterized in that, First bevel gears (15) are arranged on the two connecting shafts (14), a transmission shaft (16) is movably arranged on the lifting tool (3) through a bearing, second bevel gears (17) are arranged at the two ends of the transmission shaft (16), and the two second bevel gears (17) are meshed with the two first bevel gears (15) respectively.

4. The lightweight multi-functional container gantry crane according to claim 3, characterized in that, A side seat (18) is fixedly arranged on one side of the lifting tool (3), a rotating shaft (19) is movably arranged on the side seat (18), a third bevel gear (20) is arranged on the connecting shaft (14), a motor (21) is arranged on the lifting tool (3), and the top of the rotating shaft (19) is connected with the output end of the motor (21) through a shaft coupling; A fourth bevel gear (22) is arranged at the bottom of the rotating shaft (19), and the fourth bevel gear (22) is meshed with the third bevel gear (20).

5. The lightweight multi-functional container gantry crane according to claim 4, characterized in that, The first bevel gear (15) and the second bevel gear (17), the third bevel gear (20) and the fourth bevel gear (22) all adopt closed transmission, and the four adjusting lead screws (13) are all subjected to galvanization treatment.

6. The lightweight multi-functional container gantry crane according to claim 5, characterized in that, The main beam of the portal frame (1) is made of Q460 high-strength steel, and the supporting leg is a trapezoidal cross-section structure; A weight sensor is integrated at the spin lock at the top of the lifting tool (3), a tungsten wear-resistant coating is arranged on the inner wall of the sliding groove (5) of the mounting seat (4), and the surface of the guide roller (8) is wrapped with a polyurethane elastic layer; An intelligent control system is further included, the intelligent control system takes a Siemens S7-200PLC as a core, connects a weight sensor, a laser ranging sensor, a high-definition camera and a touch screen, and realizes weighing protection, automatic alignment and remote monitoring.

7. The lightweight multi-functional container gantry crane according to claim 6, characterized in that, The intelligent control system comprises an overload protection module, the overload protection module collects the hoisting weight through a weight sensor, when the weight is greater than or equal to 36 tons, the PLC cuts off the power supply of the lifting mechanism (2), triggers the sound-light alarm, and displays the overload information on the touch screen.

8. The lightweight multi-functional container gantry crane according to claim 7, characterized in that, The intelligent control system comprises an automatic alignment module, the automatic alignment module detects the alignment deviation through two laser ranging sensors at the bottom of the lifting tool (3), when the horizontal or longitudinal deviation is greater than 5 mm, the PLC adjusts the trolley running speed to control the deviation within ±2 mm.

9. The lightweight multi-functional container gantry crane according to claim 8, characterized in that, The intelligent control system comprises a remote monitoring module, the remote monitoring module transmits the live picture to the central control room through the high-definition camera, the high-definition camera covers the main beam of the portal (1), the trolley, the lifting tool (3) and the working area, and the picture delay is less than or equal to 200 ms. The touch screen displays the lifting height, running speed, motor temperature parameters in real time, supports fault code inquiry and maintenance suggestion pushing.

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