Anti-torsion device for crane travelling mechanism of quay crane and anti-torsion method for loading and unloading ship of quay crane

Abstract

The embodiment of the invention provides an anti-torsion device for a quay crane cart walking mechanism and an anti-torsion method for quay crane loading and unloading ships, and relates to the technical field of large and heavy complete machine marine transportation loading and unloading ships. The invention aims to solve the problem that the rail gauge of the quay crane is changed and the quay crane cannot enter the rail normally due to the torsional moment generated when a winch pulls a traction support. The anti-torsion device comprises an anti-torsion structure and an anti-shear block. The anti-shearing block is tightly attached between the bottom face of the lower cross beam and the top face of the large balance beam, and the anti-torsion structures are symmetrically fixed to the two ends of the anti-shearing block; under the condition that the traction system acts on the traction support to generate torsional moment, the torsion resisting structure limits torsion between the large balance beam and the lower cross beam; wherein the traction support is fixed on the large balance beam. The quay crane ship loading and unloading anti-torsion method is implemented by adopting the quay crane cart traveling mechanism anti-torsion device. Relative rotation between the large balance beam and the lower cross beam can be effectively prevented through the anti-twisting device, and therefore it is guaranteed that the traveling mechanism of the bridge crane cart does not deform.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heavy whole machine sea freight loading and unloading ship technology, in particular, relates to a shore-to-shore crane running gear anti-torsion device and a shore-to-shore crane loading and unloading anti-torsion method. BACKGROUND

[0002] With the continuous development of container business, container transport ships are becoming larger and larger, and port machinery handling equipment-shore cranes are also becoming larger and larger, and the weight is increasing. However, the bearing capacity of the wharf design is limited, and the wheel pressure of the shore crane cannot be too large. In order to control the wheel pressure, the number of wheels of the shore crane running gear is increased to reduce the wheel pressure of each wheel during the design of the shore crane running gear, so that the number of wheels is more than 10. The result of this design of the shore crane running gear is that the traction device cannot be arranged at the center of the shore crane running gear. During the whole process of loading and unloading the ship by the shore crane, the traction shore crane will expand the track gauge, resulting in the occurrence of rail biting or even the inability to normally enter the rail after the shore crane running gear enters the rail.

[0003] The existing shore crane has a traction support installed on the large balance beam of the trolley running gear (more than 10 wheels) during the loading and unloading of the ship, and the traction system realizes the loading and unloading operation of the shore crane through the traction support. However, since the position of installing the traction support is designed eccentrically, when the traction system tractions the trolley running gear, a torsional moment will be generated between the trolley running gear and the main body of the shore crane, which will change the straightness of the track gauge of the shore crane, resulting in the occurrence of rail biting after the shore crane enters the track of the wharf, and even cannot enter the rail in severe cases.

[0004] If the track gauge of the shore crane is corrected, not only a large amount of time and manpower will be consumed, the construction cost will be increased, but also the period of putting the shore crane into use will be prolonged, and the user's satisfaction will be reduced. In addition, for the shore crane trolley running gear with more than 10 wheels, its structure is relatively complex, and once the track gauge changes due to the torsional moment, the correction difficulty will be greater, and the maintenance cost in the later period will also be significantly increased. SUMMARY

[0005] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0006] The purpose of the present application includes, for example, providing a quay crane trolley running mechanism anti-twist device and quay crane loading and unloading anti-twist method, which can improve the problem that the rail gauge is out of tolerance, the rail is gnawed or cannot be entered, the cost of rail gauge correction is high, the difficulty is great and the production cycle is seriously delayed due to the twist torque generated when the quay crane trolley running mechanism of 10 wheels or more is installed eccentrically on the traction support during quay crane loading and unloading.

[0007] The embodiments of the present application can be implemented as follows:

[0008] The embodiments of the present application provide a quay crane trolley running mechanism anti-twist device, which is installed between the lower cross beam of the quay crane and the large balance beam of the trolley running mechanism, and includes an anti-twist structure and a shear block. The shear block is tightly attached between the bottom surface of the lower cross beam and the top surface of the large balance beam, the anti-twist structure is symmetrically fixed at both ends of the shear block and is used for limiting both sides of the lower cross beam and the large balance beam respectively, and the anti-twist structure limits the twist between the large balance beam and the lower cross beam in the case that the traction system acts on the traction support to generate a twist torque. The traction support is fixed to the large balance beam.

[0009] In addition, the quay crane trolley running mechanism anti-twist device provided by the embodiments of the present application can also have the following additional technical features:

[0010] Optionally, the shear block includes opposite upper and lower contact surfaces, the upper contact surface is gaplessly attached to the bottom surface of the lower cross beam, and the lower contact surface is gaplessly attached to the top surface of the large balance beam.

[0011] Optionally, the anti-twist structure is an anti-twist rigid member fixed at both ends of the shear block, the anti-twist rigid member has a limiting surface perpendicular to the upper and lower contact surfaces, the limiting surface gaplessly cooperates with the side surfaces of the lower cross beam and the large balance beam respectively, and the gap range is ≤10mm. In the case that the traction system acts on the traction support, and the twist displacement of the large balance beam exceeds the gap range, the anti-twist rigid member mechanically limits the large balance beam.

[0012] Optionally, one anti-twist rigid member is fixed at each end of the shear block perpendicular to the direction of the trolley track, so as to limit both sides of the lower cross beam, and one anti-twist rigid member is fixed at each end of the shear block perpendicular to the direction of the trolley track, so as to limit both sides of the large balance beam.

[0013] Optionally, each anti-twist rigid member includes a vertical web and at least two reinforcing plates, the vertical web is vertically welded on the shear block, and the vertical web forms the limiting surface; and the at least two reinforcing plates are vertically welded between the back surface of the vertical web and the shear block.

[0014] Optionally, the cross section shape of the shear block along the direction of the trolley track is rectangular or H-shaped.

[0015] Optionally, the shear block comprises an upper panel, a web plate and a lower panel fixed in sequence; the surface of the upper panel forms the upper contact surface, and the lower panel forms the lower contact surface.

[0016] Optionally, the torsion-resistant structure and the shear block are both made of high-strength steel material with yield strength ≥335 MPa.

[0017] The embodiment of the present application also provides a shore-to-ship anti-torsion method, comprising: installing an anti-torsion device between a lower beam of a shore crane and a large balance beam of a trolley running mechanism; pulling a traction support fixed to the large balance beam through a traction system, so that a shipping trolley fixed to the shore crane moves on a trolley track perpendicular to the trolley track; and the anti-torsion device balances the torsional moment generated by traction in real time, so as to keep the track gauge of the trolley running mechanism unchanged.

[0018] Optionally, in the case of direct ship loading and unloading of the shore crane, two anti-torsion devices are installed on the land side lower beam of the shore crane; and in the case of over-barge loading of the shore crane, two anti-torsion devices are installed on the lower beams of the sea side and the land side of the shore crane.

[0019] The shore-to-ship anti-torsion method of the embodiment of the present application has the following advantages, for example:

[0020] The shore-to-ship anti-torsion method of the embodiment of the present application has the following advantages, for example:

[0021] The anti-torsion device can resist the torsional moment and organically combine the shear resistance and the torsion resistance. It can also effectively avoid the torsion of the trolley running mechanism caused by the torsional moment, avoid the track gauge deformation, fundamentally avoid the rail biting problem, reduce the maintenance cost, and is especially suitable for complex structures with 10 or more wheels; and the rail gauge correction process after ship loading and unloading is avoided.

[0022] The shore-to-ship anti-torsion method is implemented by using the shore-to-ship anti-torsion device, which can improve the torsional moment caused by the traction support pulled by the winch, so as to avoid the problem that the track gauge of the shore crane changes and cannot enter the track normally. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above features and advantages of the present application can be better understood by reading the following detailed description of embodiments of the application in conjunction with the drawings, in which: In the drawings, the components are not necessarily drawn to scale, and components of similar or identical function or structure can be designated with the same or similar reference numerals.

[0024] Figure 1 The structural schematic diagram of the shore crane lower cross beam, the large balance beam of the trolley traveling mechanism and the shore crane trolley traveling mechanism anti-torsion device provided by the embodiments of the present application is shown in the figure.

[0025] Figure 2 The shore crane unloading and loading anti-torsion method provided by the embodiments of the present application is shown in the figure. Figure 1 The sectional view along A-A is shown in the figure.

[0026] Figure 3 The partial side view of the shore crane unloading and loading anti-torsion method provided by the embodiments of the present application is shown in the figure. Figure 1 The partial side view of the shore crane unloading and loading anti-torsion method provided by the embodiments of the present application is shown in the figure.

[0027] Figure 4 The step block diagram of the shore crane unloading and loading anti-torsion method provided by the embodiments of the present application is shown in the figure.

[0028] Figure: Shore crane-100; Lower cross beam-101; Trolley-110; Large balance beam-111; Traction support-120; Traction system-121; Shore crane trolley traveling mechanism anti-torsion device-200; Shear block-300; Upper contact surface-310; Lower contact surface-320; Anti-torsion rigid member-400; Limit surface-410; Dispatching trolley-500. DETAILED DESCRIPTION

[0029] The present application is described in detail below in conjunction with the drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary and should not be understood as limiting the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", "vertical" and the like appear, the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is used, and is not indicative or suggestive of the device or element being indicated having a specific orientation or being constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0031] At the same time, it should be noted that if the terms "first", "second" and the like appear, they are only used for differentiation and description, and should not be understood as indicative or suggestive of relative importance.

[0032] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified or limited, the terms "mounting", "connection", "linking" should be understood broadly, for example, can be fixed connection, can be integrally connected, or can be detachably connected; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through intermediate medium, or internal connection of two elements, etc. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The following will be described in detail Figures 1 to 4 The shore crane trolley running mechanism anti-twist device 200 provided by the embodiment is described in detail.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a shore crane trolley running mechanism anti-twist device 200, which is installed between the lower cross beam 101 of the shore crane 100 and the large balance beam 111 of the trolley 110 running mechanism, and comprises an anti-twist structure and a shear block 300; the shear block 300 is tightly attached between the bottom surface of the lower cross beam 101 and the top surface of the large balance beam 111, the anti-twist structure is symmetrically fixed at both ends of the shear block 300, and is respectively used for limiting both sides of the lower cross beam 101 and the large balance beam 111; in the case that the traction system 121 acts on the traction support 120 to generate a torsional moment, the anti-twist structure limits the torsion between the large balance beam 111 and the lower cross beam 101; wherein the traction support 120 is fixed to the large balance beam 111.

[0035] The anti-twist device is installed between the lower cross beam 101 of the shore crane 100 and the large balance beam 111 of the trolley 110 running mechanism, and through the anti-twist device installed at a specific position, the traction torque is converted into internal force balance of the structure, so as to solve the track gauge deformation problem caused by eccentric traction of the shore crane 100.

[0036] Specifically, the track gauge deformation problem caused by eccentric traction is solved through the cooperative action of the shear block 300 and the anti-twist structure: when the eccentric traction support 120 of the traction system 121 acts on the large balance beam 111, the torsional moment generated will drive the large balance beam 111 to rotate relative to the lower cross beam 101. At this time, the shear block 300 tightly fits the contact surface between the bottom surface of the lower cross beam 101 and the top surface of the large balance beam 111, and generates static friction force to resist the initial torsion; when the torsion force increases, the anti-twist structure and the side surface of the large balance beam 111 / lower cross beam 101 are in contact, and the anti-twist structure generates a reverse resisting torque to forcibly terminate the rotation trend.

[0037] Therefore, the anti-twist device can resist the torsional moment, organically combines the shear resistance and the torsion resistance, effectively avoids the twist of the walking mechanism of the trolley 110 due to the torsional moment, avoids the track gauge deformation, fundamentally avoids the rail biting problem, reduces the maintenance cost, is especially suitable for the complex structure with 10 wheels or more, and avoids the track gauge correction process after the ship loading and unloading. If the anti-twist device is not arranged, the track gauge deformation is between 50 mm and 100 mm.

[0038] With reference to Figure 1 , Figure 2 and Figure 3 , in the embodiment, the shear block 300 includes opposite upper and lower contact surfaces 310 and 320, the upper contact surface 310 is in close contact with the bottom surface of the lower cross beam 101, and the lower contact surface 320 is in close contact with the top surface of the large balance beam 111.

[0039] The torsional moment generated by the traction system 121 is easy to cause the relative twist between the large balance beam 111 and the lower cross beam 101, and further affects the overall stability of the shore-to-ship container crane 100. When the torsional moment is generated by the traction system 121, the close contact of the contact surfaces can generate a large friction force and a shear resistance, effectively resisting the relative twist trend between the large balance beam 111 and the lower cross beam 101, and enhancing the anti-twist ability of the walking mechanism of the trolley 110 of the entire shore-to-ship container crane 100.

[0040] With reference to Figure 1 , Figure 2 and Figure 3 , in the embodiment, the anti-twist structure is an anti-twist rigid member 400 fixed at both ends of the shear block 300; the anti-twist rigid member 400 has a limiting surface 410 perpendicular to the upper and lower contact surfaces 310 and 320, the limiting surface 410 is in gap cooperation with the side surfaces of the lower cross beam 101 and the large balance beam 111, and the gap range is ≤10 mm; in the case that the traction system 121 acts on the traction support 120, and the torsional displacement of the large balance beam 111 exceeds the gap range, the anti-twist rigid member 400 mechanically limits the large balance beam 111.

[0041] When the traction system 121 acts to twist the large balance beam 111, the limiting surface 410 of the anti-twist rigid member 400 will be in contact with the side surfaces of the lower cross beam 101 and the large balance beam 111, and mechanically limits the same. The anti-twist rigid member 400 can effectively prevent the large balance beam 111 from continuing to twist, limit the torsional displacement within a safe range, and prevent the track gauge from being deformed due to excessive twist. At the same time, the reasonable gap setting and the precise limiting effect can facilitate the installation of the anti-twist device, guarantee the stable operation of the shore-to-ship container crane 100 under normal working conditions, quickly play a role when an abnormal twist occurs, greatly improve the anti-twist ability of the walking mechanism of the trolley 110 of the shore-to-ship container crane 100, enhance the overall safety and reliability of the shore-to-ship container crane 100, and prolong the service life of the equipment.

[0042] With reference to Figure 1 , Figure 2 and Figure 3 , in this embodiment, the shear block 300 is fixed with a torsion-resistant rigid member 400 at both ends of the upper contact surface 310 perpendicular to the direction of the cart track, to limit the two sides of the lower cross beam 101; the shear block 300 is fixed with a torsion-resistant rigid member 400 at both ends of the lower contact surface 320 perpendicular to the direction of the cart track, to limit the two sides of the large balance beam 111.

[0043] It should be noted that the cart 110 walking mechanism moves along the cart track, and the shear block 300 extends perpendicular to the direction of the cart track; when the shore-to-ship transfer bridge 100 is being installed, the traction system 121 pulls the cart 110 walking mechanism along the installation track through the traction support 120, and the installation track is perpendicular to the cart track.

[0044] The shear block 300 is fixed with a torsion-resistant rigid member 400 at both ends of the upper contact surface 310 perpendicular to the direction of the cart track, to limit the two sides of the lower cross beam 101; the shear block 300 is fixed with a torsion-resistant rigid member 400 at both ends of the lower contact surface 320 perpendicular to the direction of the cart track, to limit the two sides of the large balance beam 111. By using the rigidity of the torsion-resistant rigid member 400, the constraint of the lower cross beam 101 and the large balance beam 111 is constructed.

[0045] When a torsion trend occurs, the torsion-resistant rigid member 400 can quickly act to limit the relative torsion of the lower cross beam 101 and the large balance beam 111 from both sides. By limiting from both ends of the upper and lower contact surfaces 320, a full-range and stable anti-torsion system is formed, effectively resisting the torsional moment generated by the traction system 121, and greatly improving the anti-torsion ability of the cart 110 walking mechanism of the shore-to-ship transfer bridge 100.

[0046] With reference to Figure 1 , Figure 2 and Figure 3 , in this embodiment, each torsion-resistant rigid member 400 includes a vertical web and at least two reinforcing plates; the vertical web is vertically welded on the shear block 300, and the vertical web forms a limiting surface 410; the at least two reinforcing plates are vertically welded between the back of the vertical web and the shear block 300.

[0047] The vertical web is vertically welded on the shear block 300 to form a key limiting surface 410, which can directly block and limit the large balance beam 111 when it has a torsion trend. The at least two reinforcing plates are vertically welded between the back of the vertical web and the shear block 300 to provide strong support for the vertical web, enhancing the bending and shear resistance of the vertical web.

[0048] The structure of the vertical web and the reinforcing plate greatly improves the overall rigidity and strength of the torsion-resistant rigid member 400, which can more reliably withstand the torsional moment and precisely play the limiting role, effectively preventing the torsion between the large balance beam 111 and the lower cross beam 101.

[0049] With reference to Figure 1 , Figure 2 and Figure 3 , in this embodiment, the shear block 300 is rectangular or I-shaped in cross section along the direction of the trolley track.

[0050] The rectangular structure is simple, uniform in stress and easy to manufacture; the I-shaped structure enhances the bending and shear capacity through the web and flange. The torsional performance is enhanced to ensure the stable operation of the trolley 110 running mechanism of the shore crane 100.

[0051] With reference to Figure 1 , Figure 2 and Figure 3 , in this embodiment, the shear block 300 includes an upper panel, a web block and a lower panel fixed in sequence; the surface of the upper panel forms an upper contact surface 310, and the lower panel forms a lower contact surface 320.

[0052] The upper contact surface 310 of the upper panel surface is attached to the lower cross beam 101, and the lower contact surface 320 of the lower panel is attached to the large balance beam 111. The structure is stable and effectively enhances the torsional resistance.

[0053] In this embodiment, the torsion-resistant structure and the shear block 300 are made of high-strength steel with a yield strength of ≥335 MPa.

[0054] The torsion-resistant structure and the shear block 300 are made of high-strength steel with a yield strength of ≥335 MPa, which can better withstand the huge load and torsional moment, and significantly improve the deformation and damage resistance of the device.

[0055] With reference to Figure 1 and Figure 2 Figure 3 Figure 1 Figure 4 , the embodiment of the present application also provides a shore crane loading and unloading ship anti-torsion method, comprising the following steps: step S1, installing an anti-torsion device between the lower cross beam 101 of the shore crane 100 and the large balance beam 111 of the trolley 110 running mechanism; step S2, pulling the traction support 120 fixed to the large balance beam 111 through the traction system 121 to move the delivery trolley 500 fixed on the shore crane 100 on the trolley track perpendicular to the trolley track; step S3, the anti-torsion device balances the torsional moment generated by traction in real time to keep the track gauge of the trolley 110 running mechanism unchanged.

[0056] When the traction system 121 pulls the traction support 120 fixed to the large balance beam 111 during the movement of the quay crane 100, a torsion moment is generated, which easily changes the gauge of the walking mechanism of the trolley 110, affecting the safety and efficiency of loading and unloading. In the anti-torsion method, an anti-torsion device is first installed between the lower beam 101 and the large balance beam 111 of the quay crane 100. When the traction system 121 drives the quay crane 100 to move on the delivery trolley 500 and the traction generates a torsion moment, the device can perceive and balance the torsion moment in real time by virtue of its structural characteristics. In this way, the torsion trend of the large balance beam 111 relative to the lower beam 101 is effectively inhibited, ensuring that the gauge of the walking mechanism of the trolley 110 remains unchanged at all times. This greatly improves the stability and safety of the quay crane 100 during loading and unloading operations, reducing equipment failures and accidents caused by changes in the gauge.

[0057] In the present embodiment, in the case of direct loading and unloading of the quay crane 100, two anti-torsion devices are installed on the land-side lower beam 101 of the quay crane 100; in the case of transshipment loading of the quay crane 100, two anti-torsion devices are installed on the sea-side and land-side lower beams 101 of the quay crane 100.

[0058] The stress of the quay crane 100 is different under different loading scenarios. When directly loading and unloading, only the land side needs to be pulled, so two anti-torsion devices are installed on the land-side lower beam 101 to balance the torsion moment on this side and prevent the gauge of the walking mechanism of the trolley 110 from changing due to excessive force on one side. When transshipment loading, both the sea side and the land side need to be pulled, and both sides will be subjected to large and complex torsion. At this time, two anti-torsion devices are installed on the sea-side and land-side lower beams 101, forming a more comprehensive and balanced anti-torsion system.

[0059] According to the quay crane trolley walking mechanism anti-torsion device 200 provided in the present embodiment, the working principle of the quay crane trolley walking mechanism anti-torsion device 200 includes: through the anti-torsion device rigidly connecting the lower beam 101 and the large balance beam 111, the torsion moment is balanced internally, cutting off the vicious chain of "rotation → deformation → correction".

[0060] Specifically, the anti-torsion device includes a shear block 300 and a torsion-resistant structure, which is welded between the lower beam 101 and the large balance beam 111 and used to transfer and balance the torsion moment. The shear block 300 is tightly attached between the lower beam 101 and the large balance beam 111 of the quay crane 100, ensuring the stability of the connection; the torsion-resistant structure can be made of high-strength steel, and its cross-sectional shape can also be designed as a rectangle or an I-shaped beam according to the actual stress condition to improve its torsion resistance.

[0061] If it is direct loading and unloading, only two anti-torsion devices need to be installed on the land-side lower beam 101 of the quay crane 100; if it is transshipment loading, two anti-torsion devices need to be installed on the sea-side and land-side lower beams 101 of the quay crane 100.

[0062] During the process of ship loading and unloading by the shore bridge 100, the traction support 120 is moved by the traction system 121. The torsional moment generated by the traction is balanced and offset by the anti-torsion device.

[0063] The anti-torsion device 200 for the shore bridge trolley running mechanism has at least the following advantages:

[0064] When the winch pulls the eccentrically designed trolley 110 running mechanism, a torsional moment is generated to make the large balance beam 111 rotate relative to the lower cross beam 101. At this time, the anti-torsion device installed between the lower cross beam 101 and the large balance beam 111 begins to play a role: through the shear block 300, the lower cross beam 101 and the large balance beam 111 are tightly connected to form a stable anti-torsion structure. When the torsional moment tries to drive the large balance beam 111 to rotate relative to the lower cross beam 101, the anti-torsion structure uses its structural strength and rigidity to generate a resisting moment in the opposite direction of the torsional moment, thereby balancing the rotating moment generated by pulling the trolley 110 running mechanism.

[0065] Through this moment balance effect, the relative rotation between the large balance beam 111 and the lower cross beam 101 can be effectively prevented, and the trolley 110 running mechanism of the shore bridge 100 is prevented from deforming, thereby ensuring that the track gauge of the shore bridge 100 remains unchanged. The problem that the track gauge of the shore bridge 100 changes and cannot be normally entered into the track due to the torsional moment generated by the winch pulling the traction support 120 of the eccentrically designed trolley 110 running mechanism (10 wheels and more than 10 wheels) of the shore bridge 100 during the process of loading and unloading the shore bridge 100 is solved.

[0066] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A torsion prevention device for the traveling mechanism of a quay crane, installed between the lower crossbeam of the quay crane and the main balance beam of the traveling mechanism, characterized in that, It includes an anti-torsion structure and an anti-shear block; the anti-shear block is closely attached between the bottom surface of the lower crossbeam and the top surface of the large balance beam; the anti-torsion structure is symmetrically fixed at both ends of the anti-shear block and is used to limit the movement of both sides of the lower crossbeam and the large balance beam; when the traction system acts on the traction support to generate a torsional moment, the anti-torsion structure restricts the torsion between the large balance beam and the lower crossbeam; wherein, the traction support is fixed to the large balance beam.

2. The anti-torsion device for the quay crane traveling mechanism according to claim 1, characterized in that: The shear-resistant block includes an upper contact surface and a lower contact surface that are positioned opposite each other. The upper contact surface is in close contact with the bottom surface of the lower crossbeam without any gap, and the lower contact surface is in close contact with the top surface of the large balance beam without any gap.

3. The anti-torsion device for the quay crane traveling mechanism according to claim 2, characterized in that: The anti-torsion structure is an anti-torsion rigid member fixed at both ends of the anti-shear block; the anti-torsion rigid member has a limiting surface perpendicular to the upper contact surface and the lower contact surface, and the limiting surface is respectively clearance-fitted with the side of the lower crossbeam and the large balance beam, with a clearance range of ≤10mm; when the traction system acts on the traction support and the torsional displacement of the large balance beam exceeds the clearance range, the anti-torsion rigid member mechanically limits the large balance beam.

4. The anti-torsion device for the gantry crane traveling mechanism according to claim 3, characterized in that: The shear block has a torsional rigid member fixed at each of the two ends of the upper contact surface perpendicular to the direction of the trolley track to limit the two sides of the lower crossbeam; the shear block has a torsional rigid member fixed at each of the two ends of the lower contact surface perpendicular to the direction of the trolley track to limit the two sides of the large balance beam.

5. The anti-torsion device for the gantry crane traveling mechanism according to claim 4, characterized in that: Each of the torsional rigid members includes a vertical web and at least two reinforcing plates; the vertical web is vertically welded to the shear block, and the vertical web forms the limiting surface; at least two of the reinforcing plates are vertically welded between the back of the vertical web and the shear block.

6. The anti-torsion device for the gantry crane traveling mechanism according to claim 2, characterized in that: The cross-sectional shape of the shear-resistant block along the direction of the trolley track is rectangular or I-shaped.

7. The anti-torsion device for the gantry crane traveling mechanism according to claim 6, characterized in that: The shear-resistant block includes an upper panel, a web panel, and a lower panel fixed in sequence; the surface of the upper panel forms the upper contact surface, and the lower panel forms the lower contact surface.

8. The anti-torsion device for the traveling mechanism of the quay crane according to any one of claims 1-7, characterized in that: Both the anti-torsion structure and the anti-shear block are made of high-strength steel with a yield strength ≥335MPa.

9. A method for preventing ship torsion during quay crane loading and unloading, characterized in that, include: Install the anti-torsion device as described in any one of claims 1-8 between the crossbeam under the quay bridge and the main balance beam of the trolley traveling mechanism; The traction system pulls the traction support fixed to the large balance beam, causing the shipping trolley fixed on the quay crane to move on the trolley track perpendicular to the main trolley track. The anti-torsion device balances the torsional torque generated by traction in real time to keep the track gauge of the trolley traveling mechanism constant.

10. The method for preventing ship torsion during quay crane loading and unloading according to claim 9, characterized in that: When the quay crane directly loads and unloads ships, two anti-torsion devices are installed on the lower crossbeam on the land side of the quay crane; when the quay crane is used for transshipment loading, two anti-torsion devices are installed on the lower crossbeams on both the sea side and the land side of the quay crane.

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