Large-base-distance door frame reinforcing structure and quayside container crane

Abstract

The embodiment of the invention provides a large-base-distance door frame reinforcing structure and a quayside container crane, and relates to the field of quayside container cranes. The problems that the weight of a lower cross beam is increased and the manufacturing difficulty of a stand column is increased due to the arrangement of double trolleys of the quay crane are solved. The device comprises a stand column, a lower cross beam and a rigid connecting piece, rigid connecting pieces are obliquely connected between the stand columns and the lower cross beam; the upper end of the rigid connecting piece is connected to the lower end area of the stand column, the lower end of the rigid connecting piece is connected to the lower cross beam, the transverse space is located between the stand column and the cart installation point, and the rigid connecting piece is configured to partially transfer the load borne by the stand column to the cart. The quayside container crane comprises the large-base-distance door frame reinforcing structure. The rigid connecting piece disperses part of load originally acting on the stand column in a concentrated mode to the cart, the burden of the stand column is further relieved, and the stress of the whole door frame structure is more balanced. And the strength, rigidity and stability of the quayside container crane door frame are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of quay container cranes, and more specifically, to a large base distance portal frame reinforcement structure and a quay container crane. Background Art

[0002] A quay crane, also known as a shore container crane, is a device used to load and unload containers from container ships at the shore. As the demands for quay crane efficiency at terminals increase, conventional quay cranes are no longer sufficient to further improve efficiency. Therefore, it is necessary to innovatively design a new type of quay crane that changes the loading and unloading operation from one trolley to two trolleys operating simultaneously, thereby improving the loading and unloading efficiency of a single quay crane.

[0003] To enable simultaneous loading and unloading operations for both trolleys, the gantry distance of the quay crane needs to be widened accordingly. If the trolley is arranged as in a conventional quay crane, close to the column, the total width of the quay crane will exceed the specified range. Therefore, the trolley must be positioned towards the center of the gantry to meet the total width requirement of the quay crane. However, this arrangement increases the distance between the column and the trolley, thus increasing the lever arm of the lower crossbeam. To overcome the bending moment caused by the increased lever arm, the height of the lower crossbeam needs to be increased, but this will further increase the weight of the lower crossbeam.

[0004] In addition, to ensure the lateral stiffness of the quay crane during operation, it is usually necessary to widen the relative position between the columns and the lower crossbeam, which will increase the manufacturing difficulty of the columns. Summary of the Invention

[0005] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0006] The objectives of this invention include, for example, providing a large base distance door frame reinforcement structure that can improve the problems of increased weight of the lower crossbeam and increased difficulty in manufacturing the columns caused by the double trolley configuration of the quay crane.

[0007] The present invention also aims to provide a quay container crane that improves the problem of increased weight of the lower crossbeam and increased difficulty in manufacturing the columns caused by the double trolley configuration of the quay crane.

[0008] The embodiments of the present invention can be implemented as follows:

[0009] An embodiment of the present invention provides a large base distance portal frame reinforcement structure for a quay container crane. A trolley is installed at the bottom of the large base distance portal frame. The large base distance portal frame reinforcement structure includes columns, a lower crossbeam, and rigid connectors. The columns are fixed at both ends of the lower crossbeam, and the trolley is installed at the bottom of the lower crossbeam. A rigid connector is obliquely connected between the columns and the lower crossbeam. The upper end of the rigid connector is connected to the lower end region of the columns, and the lower end of the rigid connector is connected to the lower crossbeam. The lateral space of the rigid connector is located between the column and the trolley mounting point. The rigid connector is configured to transfer a portion of the load borne by the columns to the trolley.

[0010] In addition, the large base distance door frame reinforcement structure provided in the embodiments of the present invention may also have the following additional technical features:

[0011] Optionally, the rigid connector is an inclined box-shaped support beam. The upper end of the support beam is connected to the lower end region of the column within one-third of its height from top to bottom. The lower end of the support beam is connected to the intersection of the centerline of the trolley and the top flange of the lower crossbeam. The centerline of the trolley is a straight line in space passing through the load-bearing center point of the left and right door frame wheel assembly.

[0012] Optionally, the support beam includes an upper flange, a lower flange, a left web, and a right web, which are welded together to form a closed box-shaped cavity; the ends of the upper flange and the lower flange are provided with arc transition structures for transitional connection with the side flanges of the column and the top flange of the lower crossbeam.

[0013] Optionally, the box-shaped cavity of the support beam is provided with multiple reinforcing partitions with through holes and multiple longitudinal reinforcements. The multiple longitudinal reinforcements pass through the through holes respectively, and the longitudinal reinforcements are welded to the inner side of the upper flange, the lower flange, the left web and the right web.

[0014] Optionally, the column and the lower crossbeam are box-shaped structures. A first column partition and a second column partition are fixedly spaced along the length of the column within the box-shaped cavity of the column. A first crossbeam partition and a second crossbeam partition are fixedly spaced along the length of the lower crossbeam within the box-shaped cavity of the lower crossbeam. The two ends of the upper flange of the support beam are respectively aligned and welded to the first column partition and the first crossbeam partition, and the two ends of the lower flange are respectively aligned and welded to the second column partition and the second crossbeam partition.

[0015] Optionally, the column includes a left web and a right web located on both sides of the side wing plate; the lower crossbeam includes a left web and a right web connected to both sides of the top wing plate, the left web of the support beam, the left web of the column, and the left web of the crossbeam are coplanar, and the right web of the support beam, the right web of the column, and the right web of the crossbeam are coplanar.

[0016] Optionally, mesh reinforcing ribs are welded onto the first column partition, the second column partition, the first crossbeam partition, and the second crossbeam partition, respectively.

[0017] Optionally, the mesh reinforcing ribs are grid-shaped intersecting ribs welded to the partition plate, including vertical ribs welded to one side of the partition plate and horizontal ribs welded to the other side of the partition plate, wherein the projections of the vertical ribs and the horizontal ribs intersect in the plane of the partition plate.

[0018] Optionally, multiple longitudinal angle steels are welded circumferentially to the inner wall of the column box cavity, and the multiple longitudinal angle steels penetrate the first column partition and the second column partition along the length direction of the column; multiple transverse angle steels are welded circumferentially to the inner wall of the lower crossbeam cavity, and the multiple transverse angle steels penetrate the first crossbeam partition and the second crossbeam partition along the length direction of the lower crossbeam.

[0019] An embodiment of the present invention also provides a quay container crane. The quay container crane includes two trolleys and a large-base-distance gate frame reinforcement structure, wherein the two trolleys are arranged side by side on the large-base-distance gate frame.

[0020] The beneficial effects of the large base distance door frame reinforcement structure and the quay container crane of the present invention include, for example:

[0021] A large-base-distance portal frame reinforcement structure is used for quay container cranes. The trolley is installed at the bottom of the large-base-distance portal frame. The large-base-distance portal frame reinforcement structure includes columns, a lower crossbeam, and rigid connectors. Columns are fixed at both ends of the lower crossbeam, and the trolley is installed at the bottom of the lower crossbeam. Rigid connectors are inclinedly connected between the columns and the lower crossbeam. The upper end of the rigid connector is connected to the lower end area of ​​the column, and the lower end of the rigid connector is connected to the lower crossbeam. The lateral space is located between the column and the trolley installation point. The rigid connectors are configured to transfer part of the load borne by the column to the trolley.

[0022] The inclined rigid connectors, like the cables of a cable-stayed bridge, effectively distribute the vertical and horizontal forces on the column. These connectors transfer part of the load from the column to the trolley, leveraging its structural stability and ability to bear significant weight. Through the rational arrangement of these rigid connectors, some of the load originally concentrated on the column is distributed to the trolley, further reducing the column's burden and making the entire gantry structure more stress-balanced. This significantly improves the strength, rigidity, and stability of the gantry frame of the quay crane.

[0023] Quay container cranes, including the aforementioned large base distance gantry reinforcement structure, can improve the setup of the double trolleys of the quay crane, increase the lower crossbeam lever arm, thus increasing its height and weight, and widening the relative position of the column and the lower crossbeam to ensure lateral stiffness will also increase the difficulty of column manufacturing. Attached Figure Description

[0024] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related properties or features may have the same or similar reference numerals.

[0025] Figure 1 This is a front view of a quay crane provided in an embodiment of the present invention;

[0026] Figure 2 The quay container crane provided in the embodiments of the present invention is along Figure 1 Side view from direction B;

[0027] Figure 3 The quay container crane provided in the embodiments of the present invention is along Figure 1 Side view from direction A;

[0028] Figure 4 This is a partial structural diagram of a large base distance door frame reinforcement structure provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the left web of the support beam in the large base distance door frame reinforcement structure provided in an embodiment of the present invention;

[0030] Figure 6 The large base distance door frame reinforcement structure provided in the embodiments of the present invention is along Figure 4 Sectional view of CC;

[0031] Figure 7 The large base distance door frame reinforcement structure provided in the embodiments of the present invention is along Figure 4 Sectional view of AA;

[0032] Figure 8 The large base distance door frame reinforcement structure provided in the embodiments of the present invention is along Figure 4 A cross-sectional view of BB.

[0033] Icons: Quay Container Crane - 10; Large Base Spacing Portal Reinforced Structure - 20; Large Base Spacing Portal - 30; Trolley - 40; Auxiliary Trolley - 50; Column - 100; First Column Partition - 110; Second Column Partition - 120; Side Wing Plate - 130; Left Web Plate of Column - 140; Right Web Plate of Column - 150; Longitudinal Angle Steel - 160; Lower Crossbeam - 200; First Crossbeam Partition - 210; Second Crossbeam Partition - 22 0; Top flange - 230; Bottom flange - 231; Left web of crossbeam - 240; Right web of crossbeam - 250; Transverse angle steel - 260; Support beam - 300; Upper flange - 310; Lower flange - 320; Left web - 330; Right web - 340; Arc transition structure - 350; Reinforcing partition - 360; Longitudinal reinforcement - 370; Vertical stiffener - 400; Transverse stiffener - 410; Connecting beam - 500. DETAILED DESCRIPTION

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0035] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The following is combined Figures 1 to 8 The large base distance door frame reinforcement structure provided in this embodiment is described in detail.

[0039] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 An embodiment of the present invention provides a large base distance portal frame reinforcement structure 20 for a quay container crane 10. A trolley 40 is provided at the bottom of the large base distance portal frame 30. The large base distance portal frame reinforcement structure 20 includes a column 100, a lower crossbeam 200, and a rigid connector. The two ends of the lower crossbeam 200 are fixed to the column 100, and the trolley 40 is provided at the bottom of the lower crossbeam 200. The rigid connector is inclinedly connected between the column 100 and the lower crossbeam 200. The upper end of the rigid connector is connected to the lower end area of ​​the column 100, and the lower end of the rigid connector is connected to the lower crossbeam 200. The lateral space is located between the installation point of the column 100 and the trolley 40. The rigid connector is configured to transfer part of the load borne by the column 100 to the trolley 40.

[0040] It should be noted that "the lower section of column 100" refers to the section of column 100 within the vertical space between the connecting beam 500 and the lower crossbeam 200 of the quay container crane 10. The connecting beam 500 is used to connect the two door frames.

[0041] The lower crossbeam 200 has columns 100 fixed at both ends to form a frame foundation, and a trolley 40 is installed at the bottom to allow the crane to move. A rigid connector is inclined between the columns 100 and the lower crossbeam 200, with the upper end of the connector connected to the lower area of ​​the column 100 and the lower end connected to the lower crossbeam 200. The lateral space is between the installation points of the column 100 and the trolley 40. This inclined rigid connector, like the cables of a cable-stayed bridge, effectively disperses the vertical and horizontal forces on the column 100, enhancing the overall rigidity and deformation resistance of the structure, reducing stress concentration at the connection between the column 100 and the lower crossbeam 200, and lowering the risk of structural damage.

[0042] The rigid connectors transfer part of the load borne by the column 100 to the trolley 40, utilizing the trolley 40's relatively stable structure and ability to bear significant weight. Through the rational layout of the rigid connectors, some of the load originally concentrated on the column 100 is distributed to the trolley 40, further reducing the burden on the column 100 and making the stress on the entire gantry structure more balanced. This significantly improves the strength, rigidity, and stability of the gantry frame of the quay container crane 10, effectively extending the equipment's service life, reducing maintenance costs, and ensuring the crane's safety and reliability during operation.

[0043] Reference Figure 4In this embodiment, the rigid connector is an inclined box-shaped support beam 300. The upper end of the support beam 300 is connected to the lower third of the column 100 from top to bottom, and the lower end of the support beam 300 is connected to the intersection of the centerline of the trolley 40 and the top flange 230 of the lower crossbeam 200. The centerline of the trolley 40 is a straight line passing through the center point of the load-bearing structure of the wheel set of the trolley 40 on the left and right door frames. In other embodiments, the rigid connector can also be a round tube or an I-beam.

[0044] It should be noted that: "the lower part of column 100" refers to the section of column 100 within the vertical space between the connecting beam 500 and the lower crossbeam 200 of the quay container crane 10. This section is divided into three segments from top to bottom, namely the first segment, the second segment, and the third segment. "Within 1 / 3 of the height from top to bottom" refers to the first segment.

[0045] The lower crossbeam 200 includes a top flange 230, a bottom flange 231, a left web 240, and a right web 250. These flanges are interconnected to form a box-shaped structure. The quay container crane 10 includes a left portal frame and a right portal frame. In this embodiment, both the left and right portal frames use a large base distance portal frame 30. The line connecting the load-bearing points of the trolley 40 on the two portal frames intersects with the top web of the lower crossbeam 200, thus revealing the lower connection area of ​​the support beam 300.

[0046] The rigid connector is designed as an inclined box-shaped support beam 300. The upper end of the support beam 300 is connected to the lower end of the column 100 within one-third of its height from top to bottom. This position allows the support beam 300 to effectively distribute the bending moment and shear force on the lower part of the column 100, enhancing the stability of the lower part of the column 100 by utilizing the high bending and torsional resistance of the box-shaped structure. The lower end of the support beam 300 is connected to the intersection of the centerline of the trolley 40 and the top flange 230 of the lower crossbeam 200. The centerline of the trolley 40 passes through the load-bearing center point of the wheel set, thus allowing the support beam 300 to accurately transfer part of the load borne by the column 100 to the trolley 40. The trolley 40, as a stable load-bearing foundation, can effectively distribute and bear these loads, avoiding excessive local stress. Through this inclined and precisely positioned connection method, the entire gantry structure forms an organic mechanical whole, improving the overall rigidity and deformation resistance of the structure and ensuring the safety and stability of the quay container crane 10 during operation.

[0047] Reference Figure 4 , Figure 5 and Figure 6In this embodiment, the support beam 300 includes an upper flange 310, a lower flange 320, a left web 330, and a right web 340. The upper flange 310, lower flange 320, left web 330, and right web 340 are welded to form a closed box-shaped cavity. The ends of the upper flange 310 and lower flange 320 are provided with arc transition structures 350 for transitional connection with the side flange 130 of the column 100 and the top flange 230 of the lower crossbeam 200.

[0048] The support beam 300 adopts a design where the upper and lower flanges 320 and the left and right web plates 340 are welded into a closed box-shaped cavity. The closed structure can effectively resist bending moment and torque. When the quay container crane 10 is operating, the frame will be subjected to complex external forces. The closed box-shaped cavity can evenly distribute these forces to each plate, enhancing the overall deformation resistance of the support beam 300.

[0049] The upper and lower flanges 320 are equipped with arc-shaped transition structures 350 at their ends, which are used to smoothly connect with the side flanges 130 of the column 100 and the top flange 230 of the lower crossbeam 200. This avoids stress concentration at the connection points. According to the principle of stress distribution, stress increases sharply at sharp corners, which can easily lead to structural damage. The arc transition allows for a smooth stress transition and reduces local stress. In this way, the support beam 300 can effectively bear and disperse external forces with its closed box-type structure, while the arc-shaped transition structure 350 reduces stress concentration at the connection points, improving the stability and reliability of the entire large base distance portal frame 30 structure and ensuring the safe operation of the crane.

[0050] Reference Figure 4 and Figure 6 In this embodiment, the box-shaped cavity of the support beam 300 is provided with multiple reinforcing partitions 360 with through holes and multiple longitudinal reinforcements 370. The multiple longitudinal reinforcements 370 pass through the through holes respectively, and the longitudinal reinforcements 370 are welded to the inner side of the upper flange 310, lower flange 320, left web 330 and right web 340.

[0051] Multiple reinforcing diaphragms 360 with through holes and multiple longitudinal reinforcements 370 are installed within the box-shaped cavity of the support beam 300. The longitudinal reinforcements 370 penetrate the through holes and are welded to the inner side of each plate. The reinforcing diaphragms 360 divide the box-shaped cavity into multiple small chambers, which can effectively limit the deformation of the box under external forces and enhance its resistance to local buckling. The longitudinal reinforcements 370 penetrate the through holes of the reinforcing diaphragms 360 and are welded to the inner side of the upper and lower flanges 320 and the left and right webs 340, forming a crisscrossing force-bearing system. When the support beam 300 is subjected to longitudinal and transverse loads, the plates can work together better to disperse and transfer stress and avoid stress concentration. In this way, the overall strength and stiffness of the support beam 300 are significantly improved.

[0052] Specifically, in this embodiment, the longitudinal reinforcement 370 is an angle steel, which passes through the through holes of all the partitions and is welded to the inner wall of the box-shaped cavity.

[0053] Reference Figure 4 , Figure 7 and Figure 8 In this embodiment, the column 100 and the lower crossbeam 200 are box-shaped structures. The first column partition 110 and the second column partition 120 are fixed at intervals along the length of the column 100 in the box-shaped cavity. The first crossbeam partition 210 and the second crossbeam partition 220 are fixed at intervals along the length of the lower crossbeam 200 in the box-shaped cavity. The two ends of the upper flange 310 of the support beam 300 are aligned and welded to the first column partition 110 and the first crossbeam partition 210, respectively. The two ends of the lower flange 320 are aligned and welded to the second column partition 120 and the second crossbeam partition 220, respectively.

[0054] The column 100 and the lower crossbeam 200 adopt a box-type structure, which has good bending and torsional resistance. The first and second column partition plates 120 and the first and second crossbeam partition plates 220 are fixed at intervals in the box-type cavities of the column 100 and the lower crossbeam 200, respectively, which further enhances the local stability of the structure, can effectively resist local deformation and buckling, and improve the overall strength.

[0055] The upper and lower flanges 320 of the support beam 300 are aligned and welded to the corresponding first and second partitions at both ends. This alignment welding method creates a tight connection between the support beam 300, the column 100, and the lower crossbeam 200. This allows for more direct and uniform force transmission, avoiding additional stress and stress concentration caused by misalignment. When the entire portal frame structure bears the complex loads of the quay container crane 10 during operation, the components can better cooperate in bearing the force, effectively improving the overall rigidity and stability of the structure.

[0056] Reference Figure 4 , Figure 7 and Figure 8 In this embodiment, the column 100 includes a left web plate 140 and a right web plate 150 located on both sides of the side wing plate 130; the lower crossbeam 200 includes a left web plate 240 and a right web plate 250 connected to both sides of the top wing plate 230. The left web plate 330 of the support beam 300, the left web plate 140 of the column, and the left web plate 240 of the crossbeam are coplanar, and the right web plate 340 of the support beam 300, the right web plate 150 of the column, and the right web plate 250 of the crossbeam are coplanar.

[0057] The column 100 includes symmetrically arranged side flanges 130, and a left web 140 and a right web 150 connecting the two flanges. The lower crossbeam 200 includes a top flange 230, a bottom flange 231, a left web 240, and a right web 250 connected to each other. When one side of the side flange 130 of the column 100 has an irregular structure, the web of the column 100 and the web of the support beam 300 are correspondingly provided with irregular structures.

[0058] The column 100 is box-shaped, consisting of the left and right web plates 340 on both sides of the side flange 130. The lower crossbeam 200 is also box-shaped, consisting of the left and right web plates 340 on both sides of the top flange 230. The left web plate 330 of the support beam 300 is coplanar with the left web plate 140 of the column and the left web plate 240 of the crossbeam, and the right web plate 340 is similarly coplanar. This coplanar arrangement creates a smooth force transmission path. When the quay container crane 10 is operating and the portal frame structure is under load, the force can be smoothly transmitted along the coplanar web plates, reducing stress concentration caused by structural misalignment. The shared load on each web plate enhances the overall structural integrity. Furthermore, the coplanar design allows for tighter connections between components, improving structural stability. This structural layout effectively resists complex external forces, preventing localized deformation and damage.

[0059] Reference Figure 4 , Figure 7 and Figure 8 In this embodiment, mesh reinforcing ribs are welded onto the first column partition 110, the second column partition 120, the first crossbeam partition 210, and the second crossbeam partition 220, respectively.

[0060] The mesh reinforcement can evenly distribute localized stress across the entire partition surface. When the quay container crane 10 operates and puts stress on the door frame, the partition no longer bears concentrated stress alone. Instead, the force is distributed more widely through the mesh reinforcement, effectively improving the partition's resistance to deformation and damage, thereby enhancing the overall stability of the column 100 and the lower crossbeam 200.

[0061] Reference Figure 4 , Figure 7 and Figure 8 In this embodiment, the mesh reinforcing ribs are grid-shaped intersecting ribs welded to the partition plate, including vertical ribs 400 welded to one side surface of the partition plate and horizontal ribs 410 welded to the other side surface of the partition plate. The projections of the vertical ribs 400 and the horizontal ribs 410 in the plane of the partition plate intersect. Specifically, they intersect at 90°.

[0062] The partitions here include a first upright partition 110, a second upright partition 120, a first crossbeam partition 210, and a second crossbeam partition 220. The mesh reinforcement uses a grid-like intersecting stiffener design, with vertical stiffeners 400 welded to one side of the partition and horizontal stiffeners 410 welded to the other side, their projections intersecting. This strengthens the partitions in both horizontal and vertical directions. When the door frame is under stress, the vertical stiffeners 400 effectively resist longitudinal bending deformation, while the horizontal stiffeners 410 resist lateral torsional stress. This disperses localized stress over a wider area, avoiding stress concentration. The strength and stiffness of the partitions are significantly improved, thereby enhancing the stability of the uprights 100 and the lower crossbeam 200.

[0063] Reference Figure 7 and Figure 8 In this embodiment, multiple longitudinal angle steels 160 are welded circumferentially to the inner wall of the box-shaped cavity of the column 100. The multiple longitudinal angle steels 160 penetrate the first column partition 110 and the second column partition 120 along the length direction of the column 100. Multiple transverse angle steels 260 are welded circumferentially to the inner wall of the cavity of the lower crossbeam 200. The multiple transverse angle steels 260 penetrate the first crossbeam partition 210 and the second crossbeam partition 220 along the length direction of the lower crossbeam 200.

[0064] The longitudinal angle steel 160 enhances the longitudinal bending resistance of the column 100, while the through-plate ensures that force is evenly distributed along the length of the column 100, avoiding localized stress concentration. The transverse angle steel 260 improves the transverse torsional resistance of the lower crossbeam 200, and the through-plate makes the overall stress distribution of the lower crossbeam 200 more balanced. This creates a "three-dimensional reinforcing mesh" for the column 100 and lower crossbeam 200, significantly improving the strength and stability of the portal frame structure and ensuring the safe and efficient operation of the quay container crane 10.

[0065] Reference Figure 1 , Figure 2 and Figure 3 The present invention also provides a quay container crane 10. The quay container crane 10 includes two trolleys 50 and a large base distance gate frame reinforcement structure 20, with the two trolleys 50 arranged side by side on the large base distance gate frame 30.

[0066] The crane is equipped with two trolleys 50 mounted side-by-side on a large-base-distance gantry frame 30. When the two trolleys 50 operate side-by-side, the large-base-distance gantry frame 30 provides them with stable support, effectively distributing and bearing the complex loads generated by the movement of the trolleys 50 and the lifting of goods. This structure allows the crane to maintain good balance during operation, reducing swaying and deformation, improving operational accuracy and safety, and thus increasing cargo loading and unloading efficiency to meet the demands of high-intensity, high-efficiency port operations.

[0067] According to the large base distance door frame reinforcement structure 20 provided in this embodiment, the working principle of the large base distance door frame reinforcement structure 20 is as follows:

[0068] In the large base distance portal frame reinforcement structure 20 of the quay container crane 10, both the uprights 100 and the lower crossbeam 200 are box-type structures. Multiple longitudinal angle steels 160 are welded circumferentially to the inner wall of the box-type cavity of the uprights 100, and these angle steels penetrate the first and second upright partitions 120 along their length. These partitions are also welded with a grid-like reinforcing rib (formed by the intersecting projections of vertical and horizontal stiffening plates 410 on both sides of the partition). Multiple transverse angle steels 260 are welded circumferentially to the inner wall of the box-type cavity of the lower crossbeam 200, and these transverse angle steels penetrate the first and second crossbeam partitions 220 along their length. These same partitions are also welded with this type of grid-like reinforcing rib.

[0069] The support beam 300 is also box-shaped, with a reinforcing partition 360 with through holes and longitudinal reinforcing members 370 welded to the inner side of each plate through through holes inside its cavity. The two ends of the upper flange 310 of the support beam 300 are aligned and welded to the first column partition 110 and the first crossbeam partition 210, respectively. The two ends of the lower flange 320 are aligned and welded to the second column partition 120 and the second crossbeam partition 220, respectively. The left web 330 of the support beam 300 is coplanar with the left web 140 of the column and the left web 240 of the crossbeam, and the right web 340 is similarly coplanar.

[0070] In addition, the quay container crane 10 is equipped with two trolleys 50 arranged side by side on the large base distance gantry frame 30. Through the rational design and connection of the above-mentioned components, the entire structure forms a stable mechanical system that can effectively withstand the complex loads during crane operation, improve the overall strength, rigidity and stability of the structure, and ensure the safe and efficient operation of the crane.

[0071] The large base distance door frame reinforcement structure 20 provided in this embodiment has at least the following advantages:

[0072] By adding a rigid connector inside the column 100, a portion of the force on the column 100 is transferred directly to the trolley 40 through the rigid connector. This reduces the stress on the lower crossbeam 200, allowing for a reduction in its height. Because the rigid connector is at a certain distance from the column 100, the cross-section at the bottom of the column 100 widens, thus improving the lateral stiffness of the quay crane during its movement.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A large-base-distance portal frame reinforcement structure for use in quay container cranes, wherein a trolley is provided at the bottom of the large-base-distance portal frame, characterized in that, The large base distance door frame reinforcement structure includes: Columns; The lower crossbeam has columns fixed at both ends and a large trolley installed at the bottom. And a rigid connector, which is obliquely connected between the column and the lower crossbeam; the upper end of the rigid connector is connected to the lower end region of the column, the lower end of the rigid connector is connected to the lower crossbeam, and the lateral space is located between the column and the trolley mounting point. The rigid connector is configured to transfer part of the load borne by the column to the trolley.

2. The large base distance door frame reinforcement structure according to claim 1, characterized in that: The rigid connector is an inclined box-shaped support beam. The upper end of the support beam is connected to the lower part of the column within 1 / 3 of its height from top to bottom. The lower end of the support beam is connected to the intersection of the center line of the trolley and the top flange of the lower crossbeam. The center line of the trolley is a straight line in space passing through the load-bearing center point of the left and right door frame wheel assembly.

3. The large base distance door frame reinforcement structure according to claim 2, characterized in that: The support beam includes an upper flange, a lower flange, a left web, and a right web. The upper flange, the lower flange, the left web, and the right web are welded together to form a closed box-shaped cavity. The ends of the upper flange and the lower flange are provided with arc transition structures for transitional connection with the side flanges of the column and the top flange of the lower crossbeam.

4. The large base distance door frame reinforcement structure according to claim 3, characterized in that: The box-shaped cavity of the support beam is provided with multiple reinforcing partitions with through holes and multiple longitudinal reinforcements. The multiple longitudinal reinforcements pass through the through holes respectively, and the longitudinal reinforcements are welded to the inner side of the upper flange, the lower flange, the left web and the right web.

5. The large base distance door frame reinforcement structure according to claim 3, characterized in that: The upright and the lower crossbeam are box-shaped structures. A first upright partition and a second upright partition are fixedly spaced along the length of the upright in the box-shaped cavity. A first crossbeam partition and a second crossbeam partition are fixedly spaced along the length of the lower crossbeam in the box-shaped cavity. The two ends of the upper flange of the support beam are respectively aligned and welded to the first upright partition and the first crossbeam partition, and the two ends of the lower flange are respectively aligned and welded to the second upright partition and the second crossbeam partition.

6. The large base distance door frame reinforcement structure according to claim 5, characterized in that: The column includes a left web and a right web located on both sides of the side wing plate; the lower crossbeam includes a left web and a right web connected to both sides of the top wing plate, the left web of the support beam, the left web of the column and the left web of the crossbeam are coplanar, and the right web of the support beam, the right web of the column and the right web of the crossbeam are coplanar.

7. The large base distance door frame reinforcement structure according to claim 5, characterized in that: Mesh reinforcing ribs are welded onto the first column partition, the second column partition, the first crossbeam partition, and the second crossbeam partition.

8. The large base distance door frame reinforcement structure according to claim 7, characterized in that: The mesh reinforcing ribs are cross-shaped ribs welded to the partition plate, including vertical ribs welded to one side of the partition plate and horizontal ribs welded to the other side of the partition plate. The projections of the vertical ribs and the horizontal ribs intersect in the plane of the partition plate.

9. The large base distance door frame reinforcement structure according to claim 5, characterized in that: Multiple longitudinal angle steels are welded circumferentially to the inner wall of the column box-shaped cavity, and the multiple longitudinal angle steels pass through the first column partition and the second column partition along the length direction of the column; multiple transverse angle steels are welded circumferentially to the inner wall of the lower crossbeam cavity, and the multiple transverse angle steels pass through the first crossbeam partition and the second crossbeam partition along the length direction of the lower crossbeam.

10. A quayside container crane, characterized in that, The quay container crane includes two trolleys and a large base distance gate frame reinforcement structure as described in any one of claims 1-9, wherein the two trolleys are arranged side by side on the large base distance gate frame.

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