Sectionalized load synchronous lifting, tensioning device and method for double-trolley shore-based bridge

Abstract

This invention relates to a device and method for synchronously lifting and tensioning sections of a double-trolley quay crane with increased load. The device includes a lifting body, columns, lifting clamps, a hydraulic lifter, and a lifting beam. A connecting mechanism is fixedly installed at the top of the column, comprising a mounting base and a connecting plate. The mounting base is connected to the top of the column, and the connecting plate is fixed to the hydraulic lifter. The mounting base and connecting plate are an integrated structure. The hydraulic lifter is connected to the lifting clamps via steel strands. The lifting clamps have a Z-shaped structure, and a lifting beam is welded between the two lifting clamps. The connecting plate, mounting base, and lifting clamps form a double-eccentric structure. Tensioning devices are symmetrically arranged on the outer sides of the two columns. A lower trolley is located near the land-side column, and a locking mechanism is installed at the upper end of the lower trolley. The hydraulic lifter and hydraulic tensioner are equipped with controllers, which are electrically connected to a detection system. This invention enables the lifting of a giant quay crane.

Description

Technical Field

[0001] This invention relates to the field of quay crane lifting technology, specifically to a device and method for synchronously lifting and tensioning quay cranes with segmented load increases using upper and lower double trolleys. Background Technology

[0002] The increasing size of container ships has boosted port throughput during peak periods, placing greater pressure on ports. Traditional methods for improving port equipment efficiency have reached their limits, making port equipment handling efficiency a bottleneck restricting the overall port throughput capacity. Therefore, the manufacturing and assembly of giant quay cranes has become a new research direction. Mature lifting technologies for the superstructure of quay cranes exist both domestically and internationally, including: 1. winch pulley system lifting; 2. chain climbing; and 3. hydraulic synchronous lifting. All these installation methods rely on large crawler cranes or large floating cranes. Currently, the relocation cost for a large crawler crane is approximately 2 million yuan, with a monthly rental cost of 1 million yuan; the relocation cost for a large floating crane is 5 million yuan, with a monthly rental cost of 2 million yuan. Installing one quay crane requires two large cranes and one floating crane, taking approximately four months. If a complete lifting installation method is used, the cost of a large crawler crane or large floating crane ranges from 8 million to 13 million yuan. If a hydraulic synchronous lifting technology for ultra-large components is adopted, an investment of approximately 4.4 million yuan is required. This cost is for leasing and cannot be reused. The installation cost is therefore very high. As the size of giant quay cranes increases (for example, the new quay crane produced by Huadian Heavy Industry has a front girder measuring 77 meters long, 17 meters wide, and 5 meters high; a rear girder measuring 62 meters long, 17 meters wide, and 6 meters high; a machine room measuring 29 meters long, 17 meters wide, and 11 meters high; and a total weight of approximately 2850 tons, with the lifting section weighing over 1600 tons), if installation requires multiple crawler cranes to work simultaneously, the operational difficulty is enormous. Furthermore, the limited space at the dock installation site makes it difficult for crawler cranes to move and lift within the installation area.

[0003] How to complete the installation of the giant quay crane has become an urgent problem to be solved. Therefore, during installation, the following method was chosen: first, the main lifting body (the front beam weighs approximately 350 tons, including all auxiliary facilities on the front beam; the rear beam weighs approximately 500 tons, including all auxiliary facilities on the rear beam; the machine room weighs approximately 330 tons, etc.) was installed at a low altitude before being lifted as a whole. To improve the wharf's load-bearing capacity, the applicant disclosed CN217460104U, which improved the sleepers. To save installation space in the machine room during hoisting, the applicant disclosed CN216403554U, which improved the machine room. The main lifting body was lifted using a hydraulic lifting method with land-side and sea-side columns. To prevent the land-side and sea-side columns from tilting, the applicant disclosed CN216633322U, which allows for adjustment of the column angle. However, this technical solution is not precise enough, and adjusting the columns during lifting poses a safety hazard. In addition, the applicant disclosed CN217627493U to improve the installation effect after the equipment is lifted, and also disclosed CN217627493U to facilitate the assembly of the main beam.

[0004] The lifting height of the main body during the operation is about 60 meters. The existing lifting structure occupies a large lifting space, cannot complete hydraulic lifting, and also has problems such as column tilting and flange installation. The existing installation methods and equipment precision do not meet the lifting requirements. Because the through-type quay crane has a lower trolley, the structure of the lower trolley is very complex and cannot be hoisted and installed at a high altitude. Moreover, the main beam assembled on the floor cannot meet the installation height. Therefore, the installation of the lower trolley requires the quay crane to be lifted to a certain height before the lower trolley can be installed.

[0005] Therefore, there is an urgent need for a hydraulic lifting and tensioning device to complete the segmented lifting of the quay bridge. Summary of the Invention

[0006] To address the problem of difficulty in lifting the main body of existing mega-gantry cranes, this invention provides a method and mechanism for segmented lifting and tensioning of a gantry crane with dual upper and lower trolleys, increasing load synchronously. It employs a double-eccentric structure combined with four hydraulic lifters to provide traction force to the main body, a tensioning device to ensure the columns remain vertical, an optimized lower trolley structure, and a controller and detection system. This segmented lifting method solves the problems of lifting and installing the main body of mega-gantry cranes.

[0007] To achieve the above objectives, the first aspect of the present invention proposes a segmented load-increasing synchronous lifting and tensioning device for a double-trolley quay crane, comprising a lifting main body, the lifting main body including a front beam, a rear beam and a machine room, the lifting main body being equipped with a lifting mechanism, the lifting mechanism including a sea-side column, a land-side column, lifting clamps, a hydraulic lifter and a lifting beam, the sea-side column and the land-side column each including two columns, the two columns being symmetrically arranged, a connecting mechanism being fixedly provided at the top of the column, the connecting mechanism including a mounting base and a connecting plate, the mounting base being connected to the top of the column, the connecting plate being fixed to the hydraulic lifter, the mounting base and the connecting plate being an integrated structure, the hydraulic lifter being connected to the lifting clamps via steel strands, the lifting clamps being an L-shaped structure, a lifting beam being welded between the two lifting clamps, the connecting plate, the mounting base and the lifting clamps forming a double eccentric structure;

[0008] Limiting blocks are correspondingly provided at the upper ends of the two columns;

[0009] Two tensioning devices are symmetrically arranged on the outer sides of the two columns. Each tensioning device includes a locking buckle and a hydraulic tensioner. The hydraulic tensioner is fixedly connected to a counterweight and is fixed to the locking buckle by steel strands. The locking buckle is fixed to the mounting base.

[0010] The front beam is fixed to the lifting beam. The front beam is equipped with a flange, and a corresponding flange is provided on the column. The front beam is equipped with an upper trolley.

[0011] A lower trolley is set near the landside pillar. The lower trolley is set on the bottom surface by a frame. A locking mechanism is set at the upper end of the lower trolley (14).

[0012] The hydraulic lifter and hydraulic tensioner are equipped with controllers, and the controllers are electrically connected to a detection system.

[0013] Working principle: (1) Double eccentric structure. Traditional hydraulic lifting structure has two hydraulic lifters at one lifting point. The two hydraulic lifters are symmetrically set, and the four lifting points share eight hydraulic lifters, which will affect the lifting space. Moreover, the cost of using eight hydraulic lifters is very high. The double eccentric structure design of the connecting plate and Z-shaped lifting clamp realizes a force transformation of the lifting point in the horizontal eccentric direction, vertical extension, and horizontal 90-degree turning. On the basis of stability, the lifting point structure is simplified, and the problem of limited space when the lifting body is lifted is solved.

[0014] (2) Tensioning device: Due to the high height of the sea-side and land-side columns above the ground, their upper parts will naturally tilt inward without the traction of a tensioning device. Existing tensioning devices are all manually controlled and require low precision. However, in the assembly of quay cranes, the precision of the tensioning device is required to be at the millimeter level. Setting up a hydraulic tensioner facilitates operation using a controller and, combined with a detection system, achieves millimeter-level control. Furthermore, when installing the flange, the lifting body needs to pass through the limit block first. The tensioning device can fine-tune the distance between the two columns and return to the vertical angle after the lifting body passes through the limit block. This facilitates the limit block to limit the lifting body, ensuring that the lifting body is in the flange installation position and improving the reliability of the installation.

[0015] Furthermore, the detection system includes two total stations, four laser rangefinders, two theodolites, two theodolite monitoring rods, and two total station reflectors;

[0016] Two total stations are symmetrically arranged at the front and rear ends of the sea-side column and the land-side column, respectively. The reflectors of the total stations are respectively attached to the inner side of the upper end of the sea-side column and the land-side column. Four laser rangefinders are arranged in a square array at the lower end of the lifting beam. The two theodolite monitoring scales are respectively installed on the outer end of the upper side of the sea-side column and the land-side column. The two theodolites are respectively placed on the inner side of the sea-side column and the land-side column.

[0017] The detection system is communicatively connected to the controller, which is a host computer.

[0018] The system includes a detection system to check the level of the lifting beam. Four laser rangefinders are used to detect the distance between the lifting beam and the detection points. The entire lifting process is relatively slow, and the laser rangefinders can accurately provide feedback on the height between the four detection points.

[0019] It also includes a theodolite monitoring scale and the theodolite and total station, which interact with each other and serve as a reference for detecting the distance between the columns.

[0020] The design and testing system improves operational accuracy and significantly enhances the precision of lifting operations.

[0021] Furthermore, the front beam is provided with a flange, and the locking mechanism includes an upper support structure and a lower support structure. The upper support structure is a T-shaped plate, and the lower support structure is a U-shaped plate. One end of the side of the lower support structure is hinged to the lower trolley, and the other end is connected to the lower trolley via a hinge.

[0022] Because the lower trolley is very high, it cannot be installed on the bottom surface of the lifting body. The upper support structure of the locking mechanism is used to make the flange of the front beam contact the lower trolley. The lower support structure adopts a flexible hinge so as not to hinder the lifting body from rising. After the front beam contacts the upper support structure, the lower support structure is rotated to contact the front beam. The locking hinge makes the upper support structure and the lower support structure clamp the front beam. After fixing, the lower trolley rises with the lifting body.

[0023] Furthermore, the computer room is equipped with a mounting plate, which includes a base plate and two side plates. The two ends of the base plate are hinged to the side plates, and the base plate is fixed to the computer room. The upper end of the side plates is provided with a lifting point.

[0024] During the lifting process, the two side panels remain vertical. Once the main lifting body is fixed, the side panels are opened to align with the mounting plate, and the equipment in the computer room is installed.

[0025] Furthermore, sleepers are provided at the lower ends of the seaside and landside pillars.

[0026] A second aspect of the present invention provides a method for synchronously lifting and tensioning sections of a double-trolley quay crane with increased load, characterized in that it includes:

[0027] Step 1: Fix the lifting body to the lifting beam, lock the steel strand with the wedge anchor of the hydraulic lifting device, adjust the sea-side column and the land-side column to a vertical state, use a total station to measure the distance between the sea-side column and the distance between the land-side column, and record the initial dimensions;

[0028] Four laser rangefinders were used to measure the distance between the lifting beam and the detection point and record the initial reference dimensions.

[0029] Use a theodolite to measure the theodolite's monitoring scale and record the measured dimensions;

[0030] Step 2: In the first lifting stage, control the hydraulic lifting device to slowly lift the lifting beam. Use four laser rangefinders to measure the distance between the lifting beam and the detection point. If there is a horizontal height difference, adjust the lifting speed of the four hydraulic lifting devices to make the lifting beam horizontal.

[0031] Step 3: In the second lifting stage, when the flange position of the current main beam contacts the upper support structure position of the lower trolley, fix the lower trolley to the front main beam, and fix the other side of the lower support structure to the lower trolley. The upper support structure and the lower support structure lock the front main beam.

[0032] The lifting beam is raised horizontally using a hydraulic lifter;

[0033] Step 4: When the lifting body rises to the position of the limit block, control the hydraulic tensioner to tension the sea-side column and the land-side column outward respectively. After the lifting body passes the position of the limit block, control the hydraulic tensioner to restore the sea-side column and the land-side column to a vertical state.

[0034] Step 5: Secure the lifting body to the seaside and landside columns using flanges.

[0035] Furthermore, steps 2 and 3 also include:

[0036] In the first and second lifting stages, the theodolite is used to measure the theodolite monitoring scale in real time and record the corresponding measurement dimensions. The offset is calculated, and then the distance between the sea-side and land-side columns is calculated and compared with the distance between the sea-side and land-side columns measured by the total station. Based on the offset dimensions, the hydraulic tensioner is adjusted to make the column vertical.

[0037] During both the first and second lifting stages, the angle between the column and the ground is constantly measured to ensure that the column is in a vertical position.

[0038] Furthermore, it also includes step 6:

[0039] After the main structure is lifted, the side panels are lowered to install the computer room.

[0040] The beneficial effects of the present invention through the above technical solution are as follows:

[0041] (1) This invention realizes the lifting of giant quay cranes. First, it solves the problem of space limitation caused by existing hydraulic lifting devices when lifting the main body. This invention adopts a double eccentric structure to simplify the structure of the lifting equipment, while saving the lifting cost. It makes the lifting operation of the main body unaffected by the site, and the lifting height and lifting range are not limited.

[0042] (2) This invention designs a combination of a hydraulic lifter, a hydraulic tensioner, a controller, and a detection system, which solves the problems of the column tilting horizontally and the lifting beam not being horizontal during the lifting process. The hydraulic tensioning and lifting technology can be controlled to the millimeter level, successfully solving the accuracy requirements when adjusting the horizontal tilt of the column and the horizontal level of the lifting beam. The lifting operation has a high safety factor.

[0043] (3) The present invention designs a step-by-step lifting method to solve the problems of installing and lifting the lower trolley. In the first stage, the lifting body is raised to the height of the upper part of the lower trolley, and then the lower trolley is fixed to the lifting body by a locking mechanism. Then, in the second stage, the lower trolley with the lifting body is lifted to the installation height.

[0044] (4) When the lifting body reaches the limit block, the method of this invention pulls the column outward to make the lifting body pass through the limit block, and after passing through the limit block, the column is restored to a vertical state. At this time, the upper end of the limit block provides support for the lifting body, which facilitates the flange connection between the lifting body and the column and improves the safety of the assembly operation. Attached Figure Description

[0045] Figure 1 This is one of the structural schematic diagrams of a segmented load synchronous lifting and tensioning device for a double-trolley quay crane according to the present invention;

[0046] Figure 2 This is the second schematic diagram of a structural design for a segmented load-synchronized lifting and tensioning device for a double-trolley quay crane according to the present invention.

[0047] Figure 3 This is the third structural schematic diagram of a segmented load-synchronized lifting and tensioning device for a double-trolley quay crane according to the present invention.

[0048] Figure 4 This is the fourth structural schematic diagram of a segmented load synchronous lifting and tensioning device for a double-trolley quay crane according to the present invention.

[0049] Figure 5 This is the fifth schematic diagram of a structural design for a segmented load-synchronized lifting and tensioning device for a double-trolley quay crane according to the present invention.

[0050] Figure 6 This is the sixth schematic diagram of a structural design for a segmented load-synchronized lifting and tensioning device for a double-trolley quay crane according to the present invention.

[0051] Figure 7 This is the seventh structural schematic diagram of a segmented load-synchronized lifting and tensioning device for a double-trolley quay crane according to the present invention.

[0052] Figure 8 This is the eighth schematic diagram of the structure of a segmented load synchronous lifting and tensioning device for a double-trolley quay crane according to the present invention;

[0053] Figure 9 This is a schematic diagram of the first lifting stage of a method for synchronously lifting and tensioning sections of a double-trolley quay crane according to the present invention.

[0054] Figure 10 This is a schematic diagram of the second lifting stage of a method for synchronously lifting and tensioning sections of a double-trolley quay crane according to the present invention.

[0055] Figure 11 for Figure 1 Enlarged view of point a;

[0056] Figure 12 for Figure 4Enlarged view of point b.

[0057] Reference numerals: 1 is the front main beam, 2 is the rear main beam, 3 is the machine room, 4 is the seaside column, 5 is the landside column, 6 is the lifting clamp, 8 is the lifting main beam, 9 is the connecting plate, 10 is the limiting block, 11 is the locking buckle, 12 is the hydraulic tensioner, 13 is the counterweight block, 14 is the lower trolley, 15 is the total station, 16 is the laser rangefinder, 17 is theodolite, 18 is theodolite scale, 19 is the total station reflector, 20 is the upper support structure, 21 is the lower support structure, 22 is the mounting plate, 23 is the sleeper, and 24 is the mounting base. Detailed Implementation

[0058] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0059] Example 1

[0060] like Figures 1-8 As shown, the upper and lower double-trolley quay crane is segmented and equipped with a synchronous load lifting and tensioning device, including a lifting main body. The lifting main body includes a front beam 1, a rear beam 2, and a machine room 3. The lifting main body is equipped with a lifting mechanism, which includes a sea-side column 4, a land-side column 5, a lifting clamp 6, a hydraulic lifter 7, and a lifting beam 8. The sea-side column 4 and the land-side column 5 each include two columns, which are symmetrically arranged. A connecting mechanism is fixedly installed at the top of the column. The connecting mechanism includes a mounting base 24 and a connecting plate 9. The mounting base 24 is connected to the top of the column, and the connecting plate 9 is fixed to the hydraulic lifter 7. The mounting base 24 and the connecting plate 9 are an integrated structure. The hydraulic lifter 7 is connected to the lifting clamp 6 through steel strands. The lifting clamp 6 has a Z-shaped structure. The lifting beam 8 is welded between the two lifting clamps 6. The connecting plate 9, the mounting base 24, and the lifting clamp 6 form a double eccentric structure. (e.g.) Figure 5 As shown, the hydraulic lifter 7 is not located at the center of the column, which is an eccentric structure. In addition, the lifting clamp 6 is Z-shaped and contacts the lifting beam 8 laterally, which is another eccentric structure relative to the column, equivalent to half the space occupied by the original two hydraulic lifters 7.

[0061] Trapezoidal limiting blocks 10 are provided on the inner sides of the upper ends of the two columns respectively;

[0062] Two tensioning devices are symmetrically arranged on the outer sides of the two columns. The tensioning devices include a locking buckle 11 and a hydraulic tensioner 12. The hydraulic tensioner 12 is fixedly connected to a counterweight 13. The hydraulic tensioner 12 is fixed to the locking buckle 11 through a steel strand. The locking buckle 11 is fixed to the mounting base 24.

[0063] The front beam 1 is fixed to the lifting beam 8. The front beam 1 is provided with a flange, and a corresponding flange is provided on the column. The front beam 1 is provided with an upper trolley.

[0064] A lower trolley 14 is set near the landside column 5. The lower trolley 14 is set on the bottom surface by a frame. A locking mechanism is set at the upper end of the lower trolley (14).

[0065] The hydraulic lifter 7 and the hydraulic tensioner 12 are equipped with controllers, and the controllers are electrically connected to a detection system.

[0066] like Figures 6-8 As shown in the preferred embodiment, the detection system includes two total stations 15 (F and F'), four laser rangefinders 16 (G and G' set in parallel positions), two theodolites 17, two theodolite monitoring scales 18 (H and H'), and two total station reflectors 19 (E and E').

[0067] Two total stations 15 are symmetrically arranged at the front and rear ends of the seaside column 4 and the landside column 5. The reflectors of the total stations 15 are respectively attached to the inner side of the upper end of the seaside column 4 and the landside column 5. Four laser rangefinders 16 are arranged in a square array at the lower end of the lifting beam. Two theodolite monitoring scales 18 are respectively installed on the outer end of the upper side of the seaside column 4 and the landside column 5. Two theodolites 17 are respectively placed on the inner side of the seaside column 4 and the landside column 5.

[0068] The detection system is communicatively connected to the controller, which is a host computer.

[0069] During the lifting process, the horizontal error of the lifting beam 8 must not exceed 30mm. The four columns will tilt as they are lifted, but the overall verticality of the columns must not exceed 150mm. Real-time monitoring and adjustment are required.

[0070] The preferred embodiment of the upper and lower double trolley quay crane segmented load synchronous lifting and tensioning device according to claim 1 is characterized in that the front beam 1 is provided with a flange, the locking mechanism includes an upper support structure 20 and a lower support structure 21, the upper support structure 20 is a T-shaped plate, the lower support structure 21 is a U-shaped plate, one end of the side of the lower support structure 21 is hinged to the lower trolley 14, and the other end is connected to the lower trolley 14 by a hinge.

[0071] Preferably, the computer room 3 is provided with a mounting plate 22, which includes a base plate and two side plates. The two ends of the base plate are hinged to the side plates, the base plate is fixed to the computer room 3, and the upper end of the side plates is provided with a lifting point.

[0072] Preferably, sleepers 23 are provided at the lower ends of the seaside column 4 and the landside column 5.

[0073] Example 2

[0074] A method for synchronously lifting and tensioning sections of a double-trolley quay crane with increased load, characterized by comprising:

[0075] Step 1: Fix the lifting body to the lifting beam 8, lock the steel strand with the wedge anchor of the hydraulic lifting device 7, adjust the seaside column 4 and the landside column 5 to a vertical state, use the total station 15 to measure the distance between the seaside columns 4 and the distance between the landside columns 5, and record the initial dimensions;

[0076] Four laser rangefinders 16 respectively measure the distance between the lifting beam 8 and the detection point and record the initial reference dimensions;

[0077] Use the theodolite 17 to measure the theodolite monitoring scale 18 and record the measured dimensions;

[0078] Before the actual lifting, a pre-lifting step can be added. The lifting beam 8 is slowly raised to a distance of 0.5m-1m from the jig, paused for 15 minutes, and the hydraulic lifting device 7, hydraulic station, hydraulic lines, and all safety ropes, working ropes, and other lifting points are observed. Only after confirming everything is normal can the formal lifting begin. Simultaneously, the height difference between the left and right sides of the columns, as well as the height difference between the sea and land columns, must be checked. This must be controlled within the allowable deviation of 30mm. If the deviation exceeds 30mm, lifting should be stopped immediately, and the height difference adjusted to the allowable range before continuing. If the adjustment cannot meet the allowable deviation requirement, the lifting body must be returned to the jig, and readjusted to meet the deviation requirement before lifting can continue. One day in advance, the entire upper structure is lifted 0.5 meters. After one day, the foundation settlement is measured and checked, as well as the welds and deformation at the main stress points of the additional lifting structure, to ensure there are no hidden dangers.

[0079] like Figure 9 As shown, in step 2: the first lifting stage, the hydraulic lifting device 7 is controlled to slowly lift the lifting beam 8. The distance between the lifting beam 8 and the detection point is measured by four laser rangefinders 16. If there is a horizontal height difference, the lifting speed of the four hydraulic lifting devices 7 is adjusted to make the lifting beam 8 horizontal.

[0080] The upper surface of the rear beam is installed at a height of 18.642m from the ground. It needs to be raised to a height of 24.642m before the trolley 14 is installed.

[0081] like Figure 10 As shown, in step 3: the second lifting stage, when the flange position of the current main beam 1 contacts the upper support structure 20 of the lower trolley 14, the lower trolley 14 is fixed to the front main beam 1, and the other side of the lower support structure 21 is fixed to the lower trolley 14. The upper support structure 20 and the lower support structure 21 are locked to the front main beam 1.

[0082] The hydraulic lifter 7 is used to lift the beam 8 horizontally upwards;

[0083] Step 4: When the lifting body rises to the position of the limit block 10, control the hydraulic tensioner 12 to tension the sea-side column 4 and the land-side column 5 outward respectively. After the lifting body passes the position of the limit block 10, control the hydraulic tensioner 12 to restore the sea-side column 4 and the land-side column 5 to a vertical state.

[0084] Step 5: Secure the lifting body to the seaside column 4 and the landside column 5 using flanges.

[0085] Preferably, steps 2 and 3 further include:

[0086] In the first and second lifting stages, the theodolite 17 is used to measure the theodolite monitoring scale 18 in real time and record the corresponding measurement dimensions. The offset is calculated, and then the distance between the sea-side column 4 and the land-side column 5 is calculated and compared with the distance measured by the total station 15. The hydraulic tensioner 12 is adjusted according to the offset dimensions to make the column vertical.

[0087] Preferably, step 6 is also included:

[0088] After the main body is lifted, the side panels are lowered to install the equipment room 3.

[0089] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A segmented load-synchronized lifting and tensioning device for a double-trolley quay crane, comprising a lifting main body, the lifting main body including a front beam (1), a rear beam (2) and a machine room (3), the lifting main body being equipped with a lifting mechanism, the lifting mechanism including a sea-side column (4), a land-side column (5), a lifting clamp (6), a hydraulic lifter (7) and a lifting beam (8), characterized in that, Both the seaside column (4) and the landside column (5) include two columns, which are symmetrically arranged. A connecting mechanism is fixedly installed at the top of the column. The connecting mechanism includes a mounting base (24) and a connecting plate (9). The mounting base (24) is connected to the top of the column, and the connecting plate (9) is fixed to the hydraulic lifter (7). The mounting base (24) and the connecting plate (9) are an integrated structure. The hydraulic lifter (7) is connected to the lifting clamp (6) through steel strands. The lifting clamp (6) is a Z-shaped structure. A lifting beam (8) is welded between the two lifting clamps (6). The connecting plate (9), the mounting base (24), and the lifting clamp (6) constitute a double eccentric structure. Trapezoidal limiting blocks (10) are provided on the inner sides of the upper ends of the two columns respectively. Two columns are symmetrically provided with tensioning devices on their outer sides. The tensioning devices include a lock (11) and a hydraulic tensioner (12). The hydraulic tensioner (12) is fixedly connected to a counterweight (13). The hydraulic tensioner (12) is fixed to the lock (11) by a steel strand. The lock (11) is fixed to the mounting base (24). The front beam (1) is fixed to the lifting beam (8). The front beam (1) is provided with a flange, and a flange is provided on the column corresponding to the flange. The front beam (1) is provided with an upper trolley. A lower trolley (14) is set near the landside column (5). The lower trolley (14) is set on the bottom surface through a frame. A locking mechanism is set at the upper end of the lower trolley (14). The hydraulic lifter (7) and the hydraulic tensioner (12) are equipped with controllers, and the controllers are electrically connected to a detection system; The detection system includes two total stations (15), four laser rangefinders (16), two theodolites (17), two theodolite monitoring scales (18), and two total station reflectors (19). The two total stations (15) are symmetrically arranged at the front and rear ends of the sea-side column (4) and the land-side column (5). The reflectors of the total stations (15) are respectively attached to the inner side of the upper end of the sea-side column (4) and the land-side column (5). The four laser rangefinders (16) are arranged in a square array at the lower end of the lifting beam. The two theodolite monitoring scales (18) are respectively installed on the outer end of the upper side of the sea-side column (4) and the land-side column (5). The two theodolites (17) are respectively placed on the inner side of the sea-side column (4) and the land-side column (5). The detection system is communicatively connected to a controller, which is a host computer. The front beam (1) is provided with a flange, and the locking mechanism includes an upper support structure (20) and a lower support structure (21). The upper support structure (20) is a T-shaped plate, and the lower support structure (21) is a U-shaped plate. One end of the side of the lower support structure (21) is hinged to the lower trolley (14), and the other end is connected to the lower trolley (14) by a hinge. The computer room (3) is equipped with an installation plate (22), which includes a base plate and two side plates. The two ends of the base plate are hinged to the side plates, and the base plate is fixed to the computer room (3). The upper end of the side plates is provided with a lifting point.

2. The dual-trolley quay crane segmented load synchronous lifting and tensioning device according to claim 1, characterized in that, The lower ends of the seaside column (4) and the landside column (5) are equipped with sleepers (23).

3. An operating method for a segmented load-increasing synchronous lifting and tensioning device for a double-trolley quay crane as described in any one of claims 1 to 2, comprising: Step 1: Fix the lifting body to the lifting beam (8), lock the steel strand with the wedge anchor of the hydraulic lifting device (7), adjust the sea-side column (4) and the land-side column (5) to a vertical state, use the total station (15) to measure the distance between the sea-side column (4) and the distance between the land-side column (5), and record the initial dimensions; Four laser rangefinders (16) respectively measure the distance between the lifting beam (8) and the detection point and record the initial reference dimensions; The theodolite (17) was used to measure the theodolite monitoring scale (18), and the measured dimensions were recorded; Step 2: In the first lifting stage, control the hydraulic lifter (7) to slowly lift the lifting beam (8). Use four laser rangefinders (16) to measure the distance between the lifting beam (8) and the detection point. If there is a horizontal height difference, adjust the lifting speed of the four hydraulic lifters (7) to make the lifting beam (8) horizontal. Step 3: Second lifting stage, when the flange position of the current main beam (1) contacts the upper support structure (20) of the lower trolley (14), fix the lower trolley (14) to the front main beam (1), and fix the other side of the lower support structure (21) to the lower trolley (14). The upper support structure (20) and the lower support structure (21) lock the front main beam (1). The lifting beam (8) is raised horizontally by the hydraulic lifter (7); Step 4: When the lifting body rises to the position of the limit block (10), control the hydraulic tensioner (12) to tension the sea-side column (4) and the land-side column (5) outward respectively. After the lifting body passes the position of the limit block (10), control the hydraulic tensioner (12) to restore the sea-side column (4) and the land-side column (5) to the vertical state. Step 5: Secure the lifting body to the seaside column (4) and the landside column (5) using flanges.

4. The operating method according to claim 3, characterized in that, Steps 2 and 3 also include: In the first and second lifting stages, the theodolite (17) is used to measure the theodolite monitoring scale (18) in real time and record the corresponding measurement dimensions. The offset is calculated, and then the distance between the seaside column (4) and the landside column (5) is calculated and compared according to the total station (15). The hydraulic tensioner (12) is adjusted according to the offset dimensions to make the column vertical.

5. The operating method according to claim 3, characterized in that, It also includes step 6: after the main body is lifted, the side panel is lowered to install the machine room (3).

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