Shore crane dismounting method

Abstract

The invention provides a quay crane dismounting method, and relates to the technical field of quay crane dismounting methods. According to the quay crane dismounting method, the girder assembly on the upper portion of the quay crane is lowered to the lower position of the lower cross beam for dismounting operation, the dismounting difficulty is lowered, and the dismounting safety is improved. Meanwhile, the girder assembly executes lowering operation through the steel strand tool, compared with a conventional winch, the steel strand tool is simpler in structure, convenient to transport and more advantageous in modular transportation management, the equipment installation period is shorter, and quick completion of quay crane disassembly operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of quay crane disassembly methods, and in particular, to a quay crane disassembly method. Background Art

[0002] The quay container crane, hereinafter referred to as the quay crane, can also be simply called the gantry crane. It is a professional equipment dedicated to loading and unloading container ships at container terminals and is generally installed on the shore of port terminals. In order to adapt to the rapid development of global trade, the demand for optimizing and updating quay cranes at home and abroad is increasing day by day, and the demand for old quay crane disassembly projects is also increasing.

[0003] Due to problems such as complex structure and large height, the quay crane has problems such as high danger, high disassembly cost, and long disassembly cycle during the disassembly of old quay cranes, which seriously affects the operation and use efficiency of the terminal. In order to improve this problem, currently during the disassembly of old quay cranes, a solution has emerged in which the girder assembly of the quay crane is lowered and then disassembled at low altitude. However, during the lowering process of the girder assembly, a winch is often used, and 8 winches, 8 sets of pulley blocks, 8 reels of steel wire ropes, etc. need to be equipped, as well as a complex tooling structure for hydraulic jacking disassembly. The lowering tooling structure is complex and still takes a long time. Summary of the Invention

[0004] The purpose of the present invention is to provide a quay crane disassembly method, which can improve the technical problems of long time consumption and complex tooling structure during the lowering process of the girder assembly in the existing quay crane disassembly process.

[0005] The embodiments of the present invention can be implemented in the following ways:

[0006] A quay crane disassembly method for disassembling a quay crane, the quay crane including a girder assembly and a door frame assembly, the girder assembly being located above the door frame assembly, and the trapezoidal frame of the girder assembly being fixedly connected to the columns of the door frame assembly, with an upper cross beam provided between the two columns; the quay crane disassembly method includes:

[0007] Cut the trapezoidal frame and reinforce the connection to the upper cross beam;

[0008] Install a steel strand tooling at the top of the column; wherein, the steel strand tooling includes a mounting support, a supporting beam, a first steel strand, a second steel strand, and a driving member; the mounting support is installed at the upper end of the column, the supporting beam is supported below the upper cross beam; the first steel strand and the second steel strand pass through the mounting support and are fixed at both ends of the supporting beam to connect the supporting beam and the mounting support through the first steel strand and the second steel strand; the driving member is used to drive the retraction and release of the first steel strand and the second steel strand;

[0009] Cut the upper crossbeam;

[0010] Use the steel strand tooling to lower the girder assembly together with the cut upper crossbeam onto the lower crossbeam of the doorframe assembly;

[0011] Disassemble each part of the doorframe assembly and the girder assembly.

[0012] Optionally, the step of installing the steel strand tooling at the top of the column includes:

[0013] Install the mounting support on the upper side of the column;

[0014] After assembling the first steel strand, the second steel strand and the driving member, hoist them to the upper part of the mounting support, and pass the first steel strand and the second steel strand through the mounting support;

[0015] Hoist the supporting beam to the lower part of the upper crossbeam, and fixedly connect the first steel strand and the second steel strand to both ends of the supporting beam respectively.

[0016] Optionally, the driving member includes a driving oil cylinder. The step of hoisting the first steel strand, the second steel strand and the driving member to the upper part of the mounting support after assembling includes:

[0017] Hoist the first steel strand, the second steel strand and the driving oil cylinder to the upper part of the mounting support after assembling; wherein, the driving oil cylinder includes a first driving oil cylinder and a second driving oil cylinder. The first driving oil cylinder is connected to the first steel strand to drive the first steel strand to retract and extend; the second driving oil cylinder is connected to the second steel strand to drive the second steel strand to retract and extend.

[0018] Optionally, the driving member further includes a hydraulic station. After fixedly connecting the first steel strand and the second steel strand to both ends of the supporting beam respectively, the step of installing the steel strand tooling at the top of the column further includes:

[0019] Fix the hydraulic station to the connecting crossbeam of the doorframe assembly, and connect the hydraulic station and the driving oil cylinder by an oil circuit.

[0020] Optionally, the steel strand tooling further includes a guide frame assembly. The step of hoisting the first steel strand, the second steel strand and the driving member to the upper part of the mounting support after assembling includes:

[0021] Install the first steel strand, the second steel strand and the driving member on the guide frame assembly to form an assembled component;

[0022] Hoist the assembled component to the upper part of the mounting support;

[0023] Fix the guiding frame assembly to the mounting support to achieve the fixed connection between the assembled component and the mounting support.

[0024] Optionally, the step of fixing the guiding frame assembly to the mounting support includes:

[0025] Fix the guiding frame assembly to the mounting support by bolts.

[0026] Optionally, the strand tooling further includes a bottom anchor bracket. The step of respectively fixing the first strand and the second strand to both ends of the supporting beam includes:

[0027] After the first strand and the second strand pass through the mounting support, respectively fix one ends of the first strand and the second strand passing through the mounting support to the bottom anchor bracket;

[0028] After the supporting beam is hoisted below the upper crossbeam, fix the bottom anchor bracket to both ends of the supporting beam.

[0029] Optionally, the mounting support has a first ear and a second ear, and the column is provided with a third ear and a fourth ear; the third ear is closer to the outside of the column than the fourth ear, and the orientations of the third ear and the fourth ear are arranged at an angle; the step of installing the mounting support on the upper side of the column includes:

[0030] Hoist the mounting support above the column, connect the first ear and the third ear through a first pin shaft, and then connect the second ear and the fourth ear through a second pin shaft.

[0031] Optionally, the step of cutting the trapezoidal frame and strengthening the connection to the upper crossbeam includes:

[0032] Fix a strengthening bracket between the trapezoidal frame and the upper crossbeam so that the trapezoidal frame is fixedly connected to the upper crossbeam through the strengthening bracket;

[0033] Cut off the part of the trapezoidal frame between the position where the trapezoidal frame is connected to the strengthening bracket and the position where the trapezoidal frame is connected to the column.

[0034] Optionally, after the step of lowering the girder assembly together with the upper crossbeam onto the lower crossbeam of the doorframe assembly and before the step of disassembling each part in the doorframe assembly and the girder assembly, the quay crane disassembly method further includes:

[0035] Arrange a high tire rack below the rear girder of the girder assembly to support the girder assembly.

[0036] The beneficial effects of the quay crane disassembly method provided by the embodiments of the present invention include:

[0037] The quay crane disassembly method provided by the embodiments of the present invention is used to disassemble a quay crane. The quay crane includes a girder assembly and a doorframe assembly. The girder assembly is located above the doorframe assembly, and the trapezoidal frame of the girder assembly is fixedly connected to the columns of the doorframe assembly. An upper crossbeam is arranged between the two columns. The quay crane disassembly method includes: cutting the trapezoidal frame and reinforcing and connecting it to the upper crossbeam; installing a steel wire rope tooling on the top of the column; cutting the upper crossbeam to separate the upper crossbeam from the column; using the steel wire rope tooling to connect the girder assembly below the upper crossbeam to the lower crossbeam of the doorframe assembly; disassembling each part in the doorframe assembly and the girder assembly; wherein, the steel wire rope tooling includes a mounting support, a supporting beam, a first steel wire rope, a second steel wire rope and a driving member. The mounting support is installed at the upper end of the column, the supporting beam is supported below the upper crossbeam, the first steel wire rope and the second steel wire rope pass through the mounting support and are fixed at both ends of the supporting beam to connect the supporting beam and the mounting support through the first steel wire rope and the second steel wire rope. The driving member is used to drive the retraction and extension of the first steel wire rope and the second steel wire rope. In this quay crane disassembly method, by lowering the girder assembly at the upper part of the quay crane to a lower position of the lower crossbeam for disassembly operations, the disassembly difficulty is reduced and the disassembly safety is improved. At the same time, the girder assembly performs the lowering operation through the steel wire rope tooling. The steel wire rope tooling has a simpler structure compared to a conventional winch, is convenient for transportation, has more advantages in modular transportation management, and has a shorter equipment installation period, which helps to quickly complete the quay crane disassembly operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] After reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings, the above features and advantages of the present invention can be better understood. In the drawings, the components are not necessarily drawn to scale, and components with similar related characteristics or features may have the same or similar reference numerals.

[0039] Figure 1 Shows a front view of a quay crane to be disassembled provided according to an aspect of the present invention;

[0040] Figure 2 Shows a partial structural view of the A side of a quay crane to be disassembled provided according to an aspect of the present invention;

[0041] Figure 3 Shows a schematic structural view at the trapezoidal frame provided according to an aspect of the present invention;

[0042] Figure 4 Shows a schematic structural view after the trapezoidal frame is cut and reinforced provided according to an aspect of the present invention;

[0043] Figure 5Shows the front view of the quay crane after the installation of the strand tooling provided according to an aspect of the present invention;

[0044] Figure 6 Shows the right side view of the quay crane after the installation of the strand tooling provided according to an aspect of the present invention;

[0045] Figure 7 Shows the one provided according to an aspect of the present invention Figure 6 The enlarged schematic diagram of the structure at position Ⅰ;

[0046] Figure 8 Shows the schematic diagram of the cooperation structure between the strand tooling and the upper crossbeam after installation provided according to an aspect of the present invention;

[0047] Figure 9 Shows the structural diagram when lowering through the strand tooling provided according to an aspect of the present invention;

[0048] Figure 10 Shows the right side view after the girder assembly together with the cut upper crossbeam is lowered provided according to an aspect of the present invention;

[0049] Figure 11 Shows the front view after the girder assembly together with the cut upper crossbeam is lowered provided according to an aspect of the present invention.

[0050] Reference numerals:

[0051] 100 - Quay crane; 110 - Girder assembly; 111 - Trapezoidal frame; 120 - Door frame assembly; 121 - Column; 122 - Sea - side column; 123 - Land - side column; 124 - Upper crossbeam; 125 - Lower crossbeam; 126 - Connecting crossbeam; 127 - Third ear; 128 - Fourth ear;

[0052] 200 - Strand tooling; 210 - Installation support; 211 - First ear; 212 - Second ear; 220 - Assembly; 221 - First assembly; 222 - Second assembly; 223 - First steel strand; 224 - Second steel strand; 225 - First driving oil cylinder; 226 - Second driving oil cylinder; 227 - First guide frame assembly; 228 - Second guide frame assembly; 230 - Bottom anchor support; 240 - Support beam; 250 - Hydraulic station; 261 - First pin shaft; 262 - Second pin shaft;

[0053] 300 - Reinforcement bracket; 311 - Reinforcement crossbeam; 312 - First reinforcement arm; 313 - Second reinforcement arm;

[0054] 400 - High tire rack; 500 - Guy wire. Detailed implementation manners

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the aspects described below in conjunction with the accompanying drawings and specific embodiments are merely exemplary and should not be construed as imposing any limitation on the protection scope of the present invention.

[0056] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", "vertical", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0057] At the same time, it should be noted that if terms such as "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0058] In the description of the present invention, it should also be noted that unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or the internal communication of two elements, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Figure 1 Fig. 13 is a front view of the quay crane 100 to be disassembled provided in this embodiment. Figure 2 Fig. 15 is a partial structural view of the A side of the quay crane 100 to be disassembled provided in this embodiment, that is, a right view. As Figure 1 and Figure 2 show the structure of a conventional quay crane 100, which has a portal frame assembly 120 and a girder assembly 110. Generally, the portal frame assembly 120 has four columns 121, namely two sea-side columns 122 and two land-side columns 123. The lower ends of the two sea-side columns 122 and the lower ends of the two land-side columns 123 are connected by a lower cross beam 125. Specifically, the lower cross beam 125 between the two sea-side columns 122 is the sea-side lower cross beam, and the lower cross beam 125 between the two land-side columns 123 is the land-side lower cross beam. The sea-side lower cross beam and the two sea-side columns 122 are connected to form a sea-side portal frame, and the land-side lower cross beam and the two land-side columns 123 are connected to form a land-side portal frame. The sea-side portal frame and the land-side portal frame are connected by a connecting cross beam 126. An upper cross beam 124 is also provided between the two columns 121. Specifically, a sea-side upper cross beam is provided between the upper ends of the two sea-side columns 122, and a land-side upper cross beam is provided between the upper ends of the two land-side columns 123.

[0060] The girder assembly 110 is disposed above the doorframe assembly 120, and thus the doorframe assembly 120 supports the girder assembly 110. The girder assembly 110 has a trapezoidal frame 111 fixedly connected to the upright column 121 of the doorframe assembly 120.

[0061] In order to disassemble the structure of the quay crane 100 as shown in Figure 1 and Figure 2 , an embodiment of the present invention provides a quay crane disassembly method. It can be understood that the quay crane disassembly method provided in this embodiment can also be applicable to disassembling other quay cranes 100 with structures similar to those shown in Figure 1 and Figure 2 .

[0062] The steps of the quay crane disassembly method provided by the embodiment of the present invention include:

[0063] S01: Cut the trapezoidal frame 111 and reinforce and connect it to the upper crossbeam 124.

[0064] Figure 3 shows a schematic structural view of the trapezoidal frame 111 in this embodiment, Figure 4 shows a schematic structural view of the trapezoidal frame 111 after cutting and reinforcement. Please refer to Figures 1-4 in combination. In this embodiment, the steps of cutting the trapezoidal frame 111 and reinforcing and connecting it to the upper crossbeam 124 include:

[0065] S11: Fix and connect the reinforcement bracket 300 between the trapezoidal frame 111 and the upper crossbeam 124.

[0066] Fix and connect the trapezoidal frame 111 to be cut to the upper crossbeam 124 through the reinforcement bracket 300, so that after the trapezoidal frame 111 is cut off from the upright column 121, the girder assembly 110 can be supported by the upper crossbeam 124 and the reinforcement bracket 300. Specifically, in this embodiment, the trapezoidal frame 111 to be cut is the sea-side trapezoidal frame 111, that is, the trapezoidal frame 111 fixedly connected to the sea-side upright column 122. Correspondingly, the sea-side trapezoidal frame 111 is fixedly connected to the sea-side upper crossbeam through the reinforcement bracket 300.

[0067] The reinforcement bracket 300 includes a reinforcement crossbeam 311, a first reinforcement arm 312 and a second reinforcement arm 313. The two ends of the reinforcement crossbeam 311 are respectively fixedly connected to the two arms of the trapezoidal frame 111. One end of the first reinforcement arm 312 is fixedly connected to one arm of the trapezoidal frame 111, and the other end is fixedly connected to the upper crossbeam 124; one end of the second reinforcement arm 313 is fixedly connected to the other arm of the trapezoidal frame 111, and the other end is fixedly connected to the upper crossbeam 124. Thus, the reinforcement bracket 300 forms a reinforcement structure that is generally triangular.

[0068] S12: Cut and remove the part of the trapezoidal frame 111 between the position where the trapezoidal frame 111 is connected to the reinforcement bracket 300 and the position where the trapezoidal frame 111 is connected to the column 121.

[0069] After the trapezoidal frame 111 is reinforced and connected to the upper crossbeam 124, cut Figure 3 the black part in it, so that the trapezoidal frame 111 is separated from the column 121.

[0070] It should be noted that before performing step S01, pre-disassembly preparation work can also be carried out on the quay crane 100. This pre-disassembly preparation work includes:

[0071] (1) Park the quay crane 100 at the designated disassembly position and anchor it;

[0072] (2) Lower the spreader of the quay crane 100 to the lowest position and remove it.

[0073] (3) Stop the trolley of the quay crane 100 at the parking position, and tie and fix movable parts such as the trolley and the maintenance crane.

[0074] (4) Stop the elevator of the quay crane 100 at the lowest floor.

[0075] (5) Cut off the high voltage of the quay crane 100 and confirm whether there are safety hazards.

[0076] (6) Disassemble the mechanical, electrical, and hydraulic pipe fittings, wires, cables and other related components at the disconnection of the upper crossbeam 124.

[0077] (7) Install the portal frame guy wire 500 (see Figure 10 ), and tighten it.

[0078] S02: Install the steel strand tooling 200 on the top of the column 121.

[0079] Figure 5 The front view of the quay crane 100 after the installation of the steel strand tooling 200 provided in this embodiment is shown, Figure 6 The right view of the quay crane 100 after the installation of the steel strand tooling 200 provided in this embodiment is shown, Figure 7 is Figure 6 the enlarged structural schematic diagram at I in Figure 8 This is the matching structural schematic diagram of the steel strand tooling 200 provided in this embodiment and the upper crossbeam 124 after installation. Please refer to Figures 1-8, in this embodiment, the strand tooling 200 includes a mounting support 210, a supporting beam 240, a first strand 223, a second strand 224, and a driving member. The mounting support 210 is used to be mounted on the upper end of the column 121, and the supporting beam 240 is used to support under the upper cross beam 124. The first and second strands are used to pass through the mounting support 210 and then be fixed at both ends of the supporting beam 240, so as to connect the supporting beam 240 and the mounting support 210 through the first strand 223 and the second strand 224. The driving member is used to drive the retraction and release of the first strand 223 and the second strand 224. In this way, when the first strand 223 and the second strand 224 are released, the upper cross beam 124 together with the girder assembly 110 fixed on the upper cross beam 124 is driven to descend.

[0080] Furthermore, in this embodiment, since there are four columns 121, correspondingly, the number of strand toolings 200 is also four, and the four strand toolings 200 need to be respectively installed at the four columns 121. In this embodiment, each strand tooling 200 includes two strands, namely the first strand 223 and the second strand 224. In this way, when implementing the quay crane disassembly method provided in this embodiment, the lowering operation is performed through eight strands.

[0081] Specifically, taking the installation process of one of the strand toolings 200 as an example, the steps of installing the strand tooling 200 on the top of the column 121 are described as follows. These steps include:

[0082] S21: Install the mounting support 210 on the upper side of the column 121.

[0083] In this embodiment, the mounting support 210 has a first ear 211 and a second ear 212, and the column 121 is provided with a third ear 127 and a fourth ear 128. Optionally, the third ear 127 is closer to the outer side of the column 121 than the fourth ear 128, and the orientations of the third ear 127 and the fourth ear 128 are set at an angle. It should be noted that in this embodiment, the third ear 127 and the fourth ear 128 are not components originally possessed by the quay crane 100. Therefore, before performing step S21, it further includes the step of installing the third ear 127 and the fourth ear 128 on the column 121.

[0084] It should also be noted that since the upper cross beam 124 needs to be cut in the subsequent steps, part of the upper cross beam 124 is fixed to the upper beam assembly as an integral structure, and the remaining part of the upper cross beam 124 is fixed to the column 121 as an integral structure. Therefore, in the description of step S21, "installing the mounting support 210 on the upper side of the column 121" should be understood in a broad sense. It can be that the mounting support 210 is directly installed and fixed to the column 121, or the mounting support 210 is installed and fixed on the part of the upper cross beam 124 that will remain on the column 121 subsequently. If the mounting support 210 is installed on the part of the upper cross beam 124 that will remain on the column 121 subsequently, before performing step S21, it is necessary to confirm the cutting position of the upper cross beam 124, for example, draw a cutting line on the upper cross beam 124 to divide the part of the upper cross beam 124 that will be lowered with the girder assembly 110 and the part of the upper cross beam 124 that will maintain the fixed connection with the column 121.

[0085] The steps of installing the mounting support 210 on the upper side of the column 121 include:

[0086] Lift the mounting support 210 above the column 121, connect the first ear 211 and the third ear 127 through the first pin 261, and then connect the second ear 212 and the fourth ear 128 through the second pin 262. Since the orientations of the third ear 127 and the fourth ear 128 are set at an angle, the axes of the first pin 261 installed at the third ear 127 and the second pin 262 installed at the fourth ear 128 are at an angle, so that the connection between the mounting support 210 and the column 121 can be realized through convenient and fast installation.

[0087] Specifically, in this embodiment, the orientations of the third ear 127 and the fourth ear 128 are perpendicular to each other. As Figure 7 shown, the third ear 127 is arranged in the sea-land direction of the quay crane 100, and the fourth ear 128 is arranged in the left-right direction of the quay crane 100 (as viewed from the perspective shown in Figure 6 ). In the description of this embodiment, the "orientation of the ear" refers to the axis of the through hole on the ear for the pin to pass through.

[0088] S22: Assemble the first steel strand 223, the second steel strand 224 and the driving member, then hoist them to the upper part of the mounting support 210, and pass the first steel strand 223 and the second steel strand 224 through the mounting support 210.

[0089] When performing step S22, the first steel strand 223, the second steel strand 224 and the driving member can be assembled in advance. The execution timing of step S22 is not limited here. It can be understood that in other embodiments, the steps of assembling the first steel strand 223, the second steel strand 224 and the driving member can also be carried out at other times.

[0090] In this embodiment, the driving member is a hydraulic driving structure, which includes a driving oil cylinder. Therefore, assembling the first steel strand 223, the second steel strand 224 and the driving member is essentially assembling the first steel strand 223, the second steel strand 224 and the driving oil cylinder. Among them, the driving oil cylinder includes a first driving oil cylinder 225 and a second driving oil cylinder 226. The first driving oil cylinder 225 is connected to the first steel strand 223 to drive the first steel strand 223 to retract and extend; the second driving oil cylinder 226 is connected to the second steel strand 224 to drive the second steel strand 224 to retract and extend. By using a hydraulic driving structure as the driving member for retracting and extending the first steel strand 223 and the second steel strand 224, the load limit and stroke limit of each driving oil cylinder can be manually set. In subsequent working operations, it can automatically stop when it reaches this limit, ensuring safe operation.

[0091] Furthermore, the steel strand tooling 200 further includes a guiding frame assembly. The steps of hoisting the assembled first steel strand 223, second steel strand 224 and driving member to the upper part of the mounting support 210 include:

[0092] Install the first steel strand 223, the second steel strand 224 and the driving member on the guiding frame assembly to form an assembled component 220. Specifically, in this embodiment, the steel strand tooling 200 has two guiding frame assemblies, so that the first steel strand 223 and the second steel strand 224 are respectively supported by the two guiding frame assemblies. The two guiding frame assemblies are respectively a first guiding frame assembly 227 and a second guiding frame assembly 228. The first steel strand 223 is installed on the first guiding frame assembly 227, and at the same time the first driving oil cylinder 225 is also installed on the first guiding frame assembly 227, so as to form a first assembled component 221; similarly, the second steel strand 224 and the second driving oil cylinder 226 are installed on the second guiding frame assembly 228, so as to form a second assembled component 222.

[0093] By setting the guiding frame assembly to support the steel wire rope, it is ensured that the steel wire rope retracts and extends smoothly, and further ensures that the lowering operation of the girder assembly 110 proceeds smoothly and stably.

[0094] Hoist the assembled component 220 to the upper part of the mounting support 210. Specifically, hoist the first assembled component 221 and the second assembled component 222 to the upper side of the mounting support 210 respectively.

[0095] Fix the guiding frame assembly to the mounting support 210 to achieve the fixed connection between the assembled component 220 and the mounting support 210. Specifically, after the first assembled component 221 is lifted to the upper side of the mounting support 210, fix the first guiding frame assembly 227 to the mounting support 210 to achieve the fixed connection between the first assembled component 221 and the mounting support 210; after the second assembled component 222 is lifted to the upper side of the mounting support 210, fix the second guiding frame assembly 228 to the mounting support 210 to achieve the fixed connection between the second assembled component 222 and the mounting support 210.

[0096] Optionally, the guiding frame assembly is fixedly connected to the mounting support 210 by bolts. It can be understood that in some other embodiments, other methods can also be used to achieve the connection between the guiding frame assembly and the mounting support 210, such as welding.

[0097] S23: Lift the bearing beam 240 below the upper cross beam 124, and fixedly connect the first steel strand 223 and the second steel strand 224 to both ends of the bearing beam 240 respectively.

[0098] When forming the assembled component 220 in step S22, after the steel strands are installed on the guiding frame assembly, they have a long end and a short end. After the assembled component 220 is installed on the mounting support 210, pass the short end of the steel strand through the mounting support 210 and fixedly connect it to the bearing beam 240. The first steel strand 223 and the second steel strand 224 are respectively fixed to both ends of the bearing beam 240. In this way, the stable pulling of the bearing beam 240 is ensured through the combined action of the first steel strand 223 and the second steel strand 224.

[0099] Furthermore, the steel strand tooling 200 further includes a bottom anchor bracket 230. Thus, after the first steel strand 223 and the second steel strand 224 pass through the mounting support 210, fix the ends of the first steel strand 223 and the second steel strand 224 passing through the mounting support 210 to the bottom anchor bracket 230 respectively. When the bearing beam 240 is lifted below the upper cross beam 124, fix the bottom anchor bracket 230 to both ends of the bearing beam 240.

[0100] In this embodiment, since the driving member adopts a hydraulic driving structure, the driving member further includes a hydraulic station 250 (see Figure 6 ), after step S23, step S02 further includes:

[0101] Fix the hydraulic station 250 to the connecting cross beam 126 of the door frame assembly 120, and connect the hydraulic station 250 to the driving oil cylinder for oil circuit connection. After the circuit wiring of the steel strand tooling 200 is completed, the installation of the steel strand tooling 200 is completed.

[0102] To ensure the stable operation of the steel strand tooling 200 during subsequent operations, after performing step S02, the steel strand tooling 200 can also be debugged. Specifically, the debugging content includes but is not limited to:

[0103] (1) Check whether the circuits and components are installed in place and whether the limiters are in normal working condition;

[0104] (2) Sub - part action test: Test the four steel strand toolings 200 separately;

[0105] (3) Linkage test: Test the synchronization of the four steel strand toolings 200 and conduct no - load simulated lifting test.

[0106] S03: Cut the upper cross - beam 124.

[0107] Cut the upper cross - beam 124 according to the cutting position of the upper cross - beam 124 confirmed in the foregoing process, so that the cut upper cross - beam 124 remains stable by the support of the supporting beam 240.

[0108] S04: Use the steel strand tooling 200 to lower the girder assembly 110 together with the cut upper cross - beam 124 onto the lower cross - beam 125 of the door frame assembly 120.

[0109] Figure 9 The structural diagram during the lowering by the steel strand tooling 200 in this embodiment is shown. Figure 10 The right - hand view after the girder assembly 110 together with the cut upper cross - beam 124 is lowered in this embodiment is shown. Figure 11 The front - view after the girder assembly 110 together with the cut upper cross - beam 124 is lowered in this embodiment is shown. Please refer to Figures 1-11 , after performing step S03, operate the driving part to release the first steel strand 223 and the second steel strand 224, and lower the girder assembly 110 together with the cut upper cross - beam 124 through the joint operation of the four steel strand toolings 200 until the upper cross - beam 124 is placed on the lower cross - beam 125.

[0110] Furthermore, to facilitate subsequent disassembly operations, after step S04, it also includes arranging a high - tire rack 400 under the rear girder of the girder assembly 110 to support the girder assembly 110.

[0111] S05: Disassemble each part of the door frame assembly 120 and the girder assembly 110.

[0112] The process of disassembling the girder assembly 110 includes:

[0113] ① Disassemble the front girder: Since the front girder of the girder assembly 110 is in a pitching state, it is cut and removed in sections starting from the head of the front girder. The weights of the segmented components are set according to the capacity of the hoisting equipment. Before segmentation, the pitching wire rope is removed, and the tie rod can be segmented and disassembled together with the girder sections.

[0114] ② Disassemble the rear girder: 1) Hoist and disassemble the rear tie rod; before disassembly, the land-side support frame pulls the guy wire to prevent overturning. 2) Disassemble the machine room. Since the machine room is heavy, if there is no large hoisting equipment for overall hoisting, it can be disassembled and hoisted separately for the hoisting shed, each mechanism, etc. according to the capacity of the hoisting equipment. 3) Hoist and disassemble the land-side support frame. 4) Disassemble the rear strut. Before disassembly, the sea-side trapezoidal frame 111 pulls the guy wire to prevent overturning.

[0115] 5) Hoist and disassemble the sea-side trapezoidal frame 111; 6) Hoist and remove the trolley assembly; 7) Hoist and remove the bracket trolley;

[0116] 8) Hoist and disassemble the upper crossbeams on the sea and land sides; 9) Hoist and disassemble the rear girder, which can be disassembled in sections.

[0117] The process of disassembling the door frame assembly 120 includes:

[0118] ① The left and right door frames can be segmented and hoisted and disassembled from top to bottom; before the door frame is removed, the lower crossbeam 125 installs the lower crossbeam 125 support and the crane support in advance to prevent it from overturning.

[0119] ② Hoist and disassemble the lower crossbeams on the sea and land sides separately.

[0120] ③ Hoist and disassemble the crane traveling mechanism.

[0121] The quay crane disassembly method provided by the embodiment of the present invention mainly lowers the beam assembly 110 to the lower cross beam 125 through the steel strand tooling 200, lowers the beam assembly 110 of the quay crane 100 on site, and then disassembles it in a low-pressure manner. The method is easy and flexible to operate, and the disassembly tooling is convenient to install, has high safety performance, fast disassembly, and easy maintenance. It ensures that the disassembly project of the quay crane 100 can minimize the construction cycle cost, reduce construction risks, and improve construction quality. In addition, the steel strand tooling is used to lower the beam assembly 110, and the lowering device includes 8 lifting cylinders, 8 groups of steel strands, and 8 supporting beams 240, which have certain standardized and modular characteristics and are easy to manage. Moreover, compared with the winch lifting scheme, which requires 8 winches, 8 pulley blocks, 8 rolls of wire rope, etc., and the complex tooling structure of the hydraulic jacking disassembly, this structure is simple, with fewer components and less space. During transportation, only one 40-foot container is needed to meet the demand, while the winch lifting scheme requires 3 40-foot containers to meet the demand. At the same time, when the steel strand tooling 200 is used for operation, the assembly and installation cycle is only 5 days, which is much shorter than the 10-12 days of the winch lifting scheme; the construction personnel configuration only requires 8 people, which is less than the 10 people of the winch lifting scheme; it is more time-saving and labor-saving.

[0122] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for disassembling a quay crane, for disassembling a quay crane, wherein the quay crane comprises a beam assembly and a door frame assembly, wherein the beam assembly is located above the door frame assembly, and a ladder frame of the beam assembly is fixedly connected to a column of the door frame assembly, and an upper crossbeam is arranged between two columns; characterized in that: The quay crane disassembly method comprises: cutting the ladder frame and reinforcing and connecting it to the upper beam; A steel strand tooling is installed on the top of the column; wherein the steel strand tooling includes a mounting support, a joist, a first steel strand, a second steel strand and a driving member; the mounting support is installed on the upper end of the column, and the joist is supported under the upper crossbeam; the first steel strand and the second steel strand are fixed to both ends of the joist after passing through the mounting support, so that the joist is connected to the mounting support through the first steel strand and the second steel strand; the driving member is used to drive the first steel strand and the second steel strand to be retracted and extended; cutting the upper crossbeam; Using the steel strand tooling, lower the beam assembly together with the cut upper beam onto the lower beam of the door frame assembly; Disassemble the various parts of the door frame assembly and the beam assembly.

2. The method for dismantling a quay crane according to claim 1, characterized in that: The steps of installing the steel strand tooling on the top of the column include: Installing the mounting bracket to the upper side of the column; Assemble the first steel strand, the second steel strand and the driving member and hoist them to the upper part of the mounting support, and pass the first steel strand and the second steel strand through the mounting support; The support beam is hoisted below the upper cross beam, and the first steel strand and the second steel strand are fixedly connected to two ends of the support beam respectively.

3. The method for dismantling a quay crane according to claim 2, characterized in that: The driving member includes a driving cylinder, and the steps of assembling the first steel strand, the second steel strand and the driving member and hoisting them to the upper part of the mounting support include: The first steel strand, the second steel strand and the driving cylinder are assembled and hoisted above the mounting support; wherein the driving cylinder comprises a first driving cylinder and a second driving cylinder, the first driving cylinder is connected to the first steel strand to drive the first steel strand to be retracted and extended; the second driving cylinder is connected to the second steel strand to drive the second steel strand to be retracted and extended.

4. The method for dismantling a quay crane according to claim 3, characterized in that: The driving member further includes a hydraulic station. After the first steel strand and the second steel strand are fixedly connected to the two ends of the joist, respectively, the step of installing the steel strand tooling on the top of the column further includes: The hydraulic station is fixedly connected to the connecting crossbeam of the door frame assembly, and the hydraulic station is connected to the driving cylinder through an oil circuit.

5. The method for dismantling a quay crane according to claim 2, characterized in that: The steel strand tooling also includes a guide frame assembly, and the steps of assembling the first steel strand, the second steel strand and the driving member and hoisting them to the upper part of the mounting support include: Installing the first steel strand, the second steel strand and the driving member on a guide frame assembly to form an assembly; Lifting the assembly to the upper part of the mounting support; The guide frame assembly is fixedly connected to the mounting support to achieve a fixed connection between the assembly and the mounting support.

6. The method for dismantling a quay crane according to claim 5, characterized in that: The step of fixedly connecting the guide frame assembly to the mounting support comprises: The guide frame assembly is fixedly connected to the mounting support by bolts.

7. The method for dismantling a quay crane according to claim 2, characterized in that: The steel strand tooling also includes a bottom anchor bracket, and the steps of fixing the first steel strand and the second steel strand to the two ends of the joist respectively include: After the first steel strand and the second steel strand pass through the mounting support, one end of the first steel strand and the second steel strand passing through the mounting support are fixedly connected to the bottom anchor bracket respectively; After the joist is hoisted below the upper crossbeam, the bottom anchor bracket is fixed to both ends of the joist.

8. The method for dismantling a quay crane according to claim 2, characterized in that: The mounting bracket has a first ear and a second ear, and the column is provided with a third ear and a fourth ear; the third ear is closer to the outer side of the column than the fourth ear, and the third ear and the fourth ear are arranged at an angle; the step of mounting the mounting bracket to the upper side of the column includes: The mounting bracket is hoisted above the column, the first support ear is connected to the third support ear through a first pin shaft, and then the second support ear is connected to the fourth support ear through a second pin shaft.

9. The method for dismantling a quay crane according to claim 1, characterized in that: The steps of cutting the ladder frame and reinforcing and connecting it to the upper beam include: The reinforcement bracket is fixedly connected between the ladder frame and the upper crossbeam, so that the ladder frame is fixedly connected to the upper crossbeam through the reinforcement bracket; The portion of the ladder frame between the position where the ladder frame is connected to the reinforcement bracket and the position where the ladder frame is connected to the column is cut and removed.

10. The method for dismantling a quay crane according to claim 1, characterized in that: After the step of lowering the beam assembly together with the upper beam onto the lower beam of the door frame assembly, and before the step of disassembling the door frame assembly and the parts of the beam assembly, the quay crane disassembly method further comprises: A high tire frame is arranged under the rear beam of the beam assembly to support the beam assembly.

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