Quayside container crane heightened gantry structure and method

Abstract

The invention relates to the technical field of quayside container cranes, and discloses a quayside container crane heightening portal structure and method. Two sets of seaside heightening columns are correspondingly arranged on the lower portions of two sets of seaside stand columns; the two groups of landside heightening columns are correspondingly arranged at the lower parts of the two groups of landside upright columns; each group of heightened sea-land side connecting trusses are correspondingly arranged between the sea-side heightened columns and the land-side heightened columns on the same side; considering that the load and the external force of the part above the heightened part are almost unchanged and the load and the external force of the part below the heightened part are changed when the quay crane portal frame is processed, the heightened columns are additionally arranged at the lower parts of the sea-land side upright columns, and meanwhile, the heightened sea-land side connecting trusses are additionally arranged in the trolley direction at the positions of the heightened columns; the rigidity in the trolley direction is increased; the seaside and landside diagonal bracing assemblies are reinforced by increasing the rigidity in the cart direction, so that the rigidity of the quay crane in the cart direction is guaranteed, and the strength requirement of the roots of the stand columns is met.

Description

Technical Field

[0001] The present invention relates to the technical field of shore container cranes, and in particular to a shore container crane heightening gantry structure and method. Background Art

[0002] With the widespread use of large container ships, 3E-class quayside container cranes (lifting height of 48-54 meters, outreach of 65-70 meters) have emerged. In recent years, 22,000 TEU and 24,000 TEU container ships have followed suit, leading to ever-increasing container stacking heights on ships. This has necessitated further improvements in the handling capacity of existing quayside cranes at many terminals. Terminal operators have the option of purchasing new quayside cranes with higher lifting heights or upgrading existing ones. Both options offer greater cost-effectiveness in terms of time and cost. Therefore, quayside crane equipment providers are conducting research on upgrading and upgrading quayside cranes based on market and user needs.

[0003] For example, a quay crane project at an eastern port required raising the overall structure by 6 meters, increasing the lifting height from 42 meters to 48 meters. This would enable the crane to meet the loading and unloading requirements of the world's leading 3E-class container ships. This would also save a new quay crane manufacturing cycle, typically over a year. The heightened solution would allow for immediate commissioning after the retrofit, allowing for orders for larger container ships, initial cost recovery, and ensuring production completion. However, the existing quay crane heightened structure failed to maintain the required rigidity and strength of the overall gantry. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a gantry heightening structure and method for a shore container crane, which can not only heighten the gantry structure but also take into account the overall stiffness and strength of the gantry.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, a shore container crane heightened gantry structure comprises: Two groups of sea-side heightening columns are correspondingly arranged at the lower positions of the two groups of sea-side columns; Two sets of land-side heightened columns are correspondingly arranged at the lower positions of the two sets of land-side columns; Two sets of elevated sea-side and land-side connecting trusses are provided, and each set of elevated sea-side and land-side connecting trusses is correspondingly arranged between the sea-side elevated columns and the land-side elevated columns on the same side.

[0006] As a further implementation method, the lower portions of the sea-side columns and the land-side columns are cut at the same height, and corresponding heightening columns are installed at the cut positions.

[0007] As a further implementation method, a connecting beam is provided between the sea side column and the land side column on the same side, and the connecting beam is close to the cut position and higher than the cut position; the elevated sea and land side connecting truss is provided between the connecting beam and the elevated column.

[0008] As a further implementation method, each group of the raised sea and land side connecting trusses includes a group of horizontal circular tubes and two groups of oblique circular tubes; the two ends of the horizontal circular tubes are fixedly connected to the bottom end of the raised column through a node plate; the two ends of each group of oblique circular tubes are respectively fixedly connected to the bottom end of the raised column and the middle position of the connecting beam through a node plate.

[0009] As a further implementation method, the end of the circular tube is provided with an installation groove for inserting the node plate, and oblique cutting edges are set on both sides of the end of the circular tube. After the node plate is inserted into the installation groove, a sealing plate is used to seal it between the oblique cutting edge and the node plate.

[0010] As a further implementation method, an airtight kit is installed on the sealing plate for performing an airtightness test; a stress relief hole is provided at the bottom of the installation groove, and a stress relief hole sealing plate is provided at the stress relief hole.

[0011] As a further implementation method, the connecting beam is connected to the top of the sea-side column and the top of the land-side column through a portal support pipe.

[0012] As a further implementation method, on the land side, the bottom of the land side column and the lower cross beam of the land side are connected by a land side diagonal brace that strengthens the rigidity in the trolley direction, and on the sea side, the bottom of the sea side column and the lower cross beam of the sea side are connected by a sea side diagonal brace that strengthens the rigidity in the trolley direction; the top ends of the land side diagonal brace that strengthens the rigidity in the trolley direction and the sea side diagonal brace that strengthens the rigidity in the trolley direction are both lower than the heightened column.

[0013] As a further implementation method, the land-side diagonal brace for reinforcing the trolley directional stiffness and the sea-side diagonal brace for reinforcing the trolley directional stiffness both include diagonal brace tubes, and both ends of the diagonal brace tubes are connected to the portal structure through node plates.

[0014] In a second aspect, a method for raising the gantry of a shore container crane is provided, characterized in that it comprises the following steps: When raising the quay bridge, the lower parts of the two groups of sea-side columns and the two groups of land-side columns are cut at the same height, and the corresponding sea-side heightening columns and land-side heightening columns are fixedly installed at the cut-off positions; the sea-side heightening columns and land-side heightening columns are lower than the connecting beams between the sea-side columns and land-side columns on the same side; The seaside heightened columns and the landside heightened columns on the same side are connected by horizontal circular tubes and gusset plates; the bottoms of the seaside heightened columns and the landside heightened columns on the same side are respectively connected to the middle of the connecting beam by oblique circular tubes and gusset plates; Two sets of sea-side diagonal braces are respectively provided between the lower sea-side crossbeam and the two sets of sea-side columns below the cut-off position to strengthen the trolley direction rigidity; Two sets of land-side diagonal braces for reinforcing the trolley direction stiffness are respectively arranged between the land-side lower crossbeam and the two sets of land-side columns below the cut-off position; the ends of the sea-side diagonal braces and the land-side diagonal braces are fixedly connected to the corresponding lower crossbeam and columns through node plates.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention takes into account that when the quay crane portal frame is raised, the load and external force of the part above the raising point remain almost unchanged, but the load and external force of the part below the raising point change. Therefore, raising the lower part of the column means a smaller reinforcement area and a better stiffness reinforcement effect. When the portal frame column is raised, the stiffness of the portal frame in the trolley direction and the trolley direction will inevitably decrease, especially the stiffness in the trolley direction decreases sharply. By adding a raising column at the lower position of the sea and land side column, and at the same time raising the sea and land side connecting trusses in the trolley direction at the position of the raising column, the stiffness in the trolley direction is increased; by increasing the stiffness in the trolley direction and strengthening the sea side and land side diagonal bracing components, the stiffness in the trolley direction of the quay crane is guaranteed, and the strength requirements of the column root are met; it is achieved that while raising the portal frame structure, the overall stiffness and strength of the quay crane portal frame can also be taken into account.

[0016] 2. A sealing plate is provided between the circular tube and the node plate of the present invention, and an airtight kit is installed, which can be used for airtightness test to ensure that the airtightness requirements are met, and can prevent water vapor from entering the circular tube, thereby preventing the circular tube from rusting and effectively improving the service life of the circular tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 This is a front view of the quay crane after it is elevated in an embodiment of the present invention; Figure 2 Schematic diagram of the sea side of the quay crane heightened gantry structure according to an embodiment of the present invention; Figure 3 This is a landside schematic diagram of a quay crane heightened gantry structure according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of the heightened portion of the quay crane gantry in an embodiment of the present invention; Figure 5 for Figure 4 C-section view in the figure; Figure 6 Schematic diagram of a stress relief hole sealing plate in an embodiment of the present invention; Figure 7 for Figure 5 Schematic diagram of the enlarged portion 1 shown; Figure 8 for Figure 5 Schematic diagram of enlarged II shown; Figure 9 for Figure 8 DD section view of the gusset plate shown; Figure 10 for Figure 4 The A-direction view of the sea-side diagonal bracing assembly added to the quay crane gantry is shown; Figure 11 for Figure 4 The B-direction view of the landside diagonal bracing assembly added to the quay crane gantry is shown.

[0019] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0020] Among them: 1. Sea side column, 2. Land side column, 3. Connecting beam, 4. Portal support pipe, 5. Sea side heightened column, 6. Land side heightened column, 7. Heightened sea and land side connecting truss; 12. Stress release hole sealing plate; 71. Horizontal circular tube, 72. First inclined circular tube, 73. Second inclined circular tube, 74. Node plate; 711. Sealing plate, 712. Airtight kit; 8. Sea side lower beam, 9. Sea side diagonal brace to strengthen the trolley direction stiffness, 10. Land side lower beam, 11. Land side diagonal brace to strengthen the trolley direction stiffness. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0022] Example 1 In a typical embodiment of the present invention, referring to Figures 1-11 As shown, a shore container crane heightened gantry structure, the gantry structure of the quay crane includes two sets of vertically arranged sea-side columns 1 and land-side columns 2, two sets of connecting beams 3 and two sets of support pipe systems respectively arranged between the sea-side columns 1 and the land-side columns 2 on the same side.

[0023] like Figure 1 As shown, a connecting beam 3 is provided between the seaside columns 1 and the landside columns 2 on the same side. The top ends of the two groups of seaside columns on the sea side are connected by the seaside upper beam, and the bottom ends are connected by the seaside lower beam 8.

[0024] The top ends of the two groups of land side columns 2 on the land side are connected by the land side upper cross beam, and the bottom ends are connected by the land side lower cross beam 10, as shown in FIG. Figure 3 shown.

[0025] The connecting beam 3 is connected to the top of the sea side column 1 and the top of the land side column 2 through a portal support pipe 4. The portal support pipe 4 between the sea side column 1 and the land side column 2 on the same side is V-shaped to improve the strength of the portal structure.

[0026] In this embodiment, the sea side column 1 and the land side column 2 are cut apart, and the sea side heightening column 5 and the land side heightening column 6 of a set height are installed to achieve the overall heightening of the portal structure.

[0027] like Figure 1 As shown, the two groups of sea-side heightened columns 5 are correspondingly arranged at the lower positions of the two groups of sea-side columns 1 ; the two groups of land-side heightened columns 6 are correspondingly arranged at the lower positions of the two groups of land-side columns 2 .

[0028] Specifically, the lower parts of the sea-side columns 1 and the land-side columns 2 are cut at the same height, and corresponding sea-side heightening columns 5 and land-side heightening columns 6 are installed at the cut positions, so that both ends of the heightening columns are connected to the cut sea-side columns and land-side columns as a whole.

[0029] The connecting crossbeam 3 is close to the cut-off position and is higher than the cut-off position; that is, the cut-off position of the sea-side column 1 and the land-side column is below the connecting crossbeam 3 .

[0030] The portal structure further includes two groups of elevated sea-side and land-side connecting trusses 7 , each group of elevated sea-side and land-side connecting trusses 7 being correspondingly arranged between the sea-side elevated columns 5 and the land-side elevated columns 6 and the connecting crossbeam 3 on the same side.

[0031] It is understood that the heights of the seaside and landside raising columns 5 and 6 are determined based on the required height of the gantry. The raised columns increase the lifting height of the quay crane, meeting the terminal's loading and unloading requirements while avoiding the waste of old quay cranes and the high cost of new ones. This significantly saves money and shortens the waiting time for loading and unloading larger container ships.

[0032] like Figure 1 and Figure 4 As shown, each group of the elevated sea-side and land-side connecting trusses 7 includes a group of horizontal circular tubes 71 and two groups of oblique circular tubes; the two ends of the horizontal circular tubes 71 are fixedly connected to the bottom ends of the sea-side elevated columns 5 and the land-side elevated columns 6 on the same side through node plates 74.

[0033] The two groups of oblique circular tubes are respectively the first oblique circular tube 72 and the second oblique circular tube 73 . One end of each group of oblique circular tubes is connected to the bottom end of the heightened column through a node plate 74 , and the other end is fixedly connected to the middle position of the connecting beam through a node plate 74 .

[0034] It will be appreciated that one end of the gusset plate 74 in this embodiment is fixed to the connecting beam 3 and also to the bottom of the elevated column, while the other end is used to securely connect to the corresponding horizontal circular tube 71 and the diagonal circular tube. The bottom of the elevated column can be connected to both the ends of the horizontal circular tube 71 and the diagonal circular tube via a single set of gusset plates. The connecting beam 3 can be connected to the top ends of both sets of diagonal circular tubes via a single set of gusset plates 74, or it can be connected to the top ends of both sets of diagonal circular tubes via two sets of gusset plates 74. In this embodiment, two sets of gusset plates 74 are used to connect to the top ends of both sets of diagonal circular tubes.

[0035] like Figure 4 As shown, the top of the heightened column is close to the end of the connecting beam 3. The heightened column, the connecting beam 3 and one group of oblique circular tubes form a triangular structure, which ensures the structural strength and stability of the gantry, and can greatly improve the rigidity in the direction of the trolley, thereby ensuring the performance requirements of the quay crane.

[0036] like Figure 5 As shown, for the connection positions of the horizontal circular tube 71 and the oblique circular tube and the node plate 74, a mounting groove for the node plate is opened at the end of the circular tube, and oblique 45° cut edges are set on both sides of the end of the circular tube. After the node plate is inserted into the mounting groove and welded and fixed, a sealing plate 711 is used to seal the opening between the cut edge and the node plate. The sealing plate overlaps the end of the circular tube by 5mm and is welded.

[0037] The airtightness kit 712 is installed on the sealing plate 711 to perform airtightness tests to ensure that the airtightness requirements are met. This can prevent moisture from entering the circular tube, thereby preventing the circular tube from rusting and effectively extending the service life of the circular tube.

[0038] It is understandable that the airtight kit 712 is a prior art.

[0039] like Figure 5-Figure 9 As shown, the bottom of the mounting groove is provided with a stress relief hole, and a stress relief hole sealing plate 12 is provided at the stress relief hole. The stress relief hole sealing plate 12 is provided with a slotted structure for cooperating with the node plate 74.

[0040] By setting stress relief holes, the stress on the round tube can be effectively released, thereby greatly reducing the risk of fatigue damage to the round tube and improving safety and service life.

[0041] like Figure 10 and Figure 11 As shown, on the land side, the bottom of the land side column 2 and the land side lower cross beam 10 are connected by a land side diagonal brace 11 for reinforcing the rigidity in the trolley direction, and on the sea side, the bottom of the sea side column 1 and the sea side lower cross beam 8 are connected by a sea side diagonal brace 9 for reinforcing the rigidity in the trolley direction; the top ends of the land side diagonal brace for reinforcing the rigidity in the trolley direction and the sea side diagonal brace for reinforcing the rigidity in the trolley direction are both lower than the heightened column.

[0042] The sea side diagonal brace 9 for strengthening the trolley direction rigidity and the land side diagonal brace 11 for strengthening the trolley direction rigidity serve as the sea side diagonal brace assembly and the land side diagonal brace assembly respectively, with the purpose of improving the rigidity of the quay crane gantry in the trolley direction.

[0043] The sea-side diagonal brace 9 and the land-side diagonal brace 11, which reinforce the trolley's directional rigidity, share the same structure: a diagonal brace tube, each end of which is connected to the corresponding lower crossbeam and land-side columns via gusset plates. The top end of the diagonal brace tube connects to the land-side and sea-side columns at a point lower than the bottom end of the heightened column.

[0044] It can be understood that the diagonal bracing tubes in this embodiment are circular tubes, and the connection method between the diagonal bracing tubes and the node plates is the same as the connection method between the node plates and the circular tubes in the elevated sea-land side connection trusses.

[0045] Two sets of seaside diagonal braces, reinforcing trolley directional rigidity, form triangular structures with the seaside lower crossbeam and two sets of seaside columns. Two sets of landside diagonal braces, reinforcing trolley directional rigidity, form triangular structures with the landside lower crossbeam and two sets of landside columns. This effectively improves trolley directional rigidity and the structural strength of the connection between the columns and the lower crossbeam, thus ensuring the performance requirements of the quay crane.

[0046] This embodiment solves the technical problems in the prior art that the quay crane heightening structure does not take into account the overall rigidity and strength of the quay crane portal frame and is complex to install.

[0047] This embodiment takes into account that the load and external forces above the elevated point remain largely unchanged, while those below the elevated point do. Therefore, raising and strengthening the lower portion of the mast is appropriate and suitable. When the mast columns are raised, the mast's stiffness in both the trolley and carriage directions inevitably decreases, with the stiffness in the trolley direction decreasing significantly. By adding and raising the sea-land side connecting trusses 7 in the trolley direction, the stiffness in the trolley direction is increased.

[0048] The stiffness in the trolley direction cannot be ignored either, especially for old quay cranes with less stiffness in the trolley direction or automated quay cranes with higher stiffness requirements in the trolley direction. By increasing the stiffness in the trolley direction and strengthening the sea side and land side diagonal bracing components, the stiffness in the trolley direction of the quay crane is guaranteed and the strength requirements of the column root are met.

[0049] Example 2 In a typical embodiment of the present invention, reference is made to Figures 1-11 As shown, a method for raising the gantry of a shore container crane, which is used to form the shore container crane raised gantry structure of embodiment 1, comprises the following steps: When raising the shore bridge, the lower parts of the two groups of sea-side columns 1 and the two groups of land-side columns 2 are cut at the same height, and the corresponding sea-side raising columns 5 and land-side raising columns 6 are respectively welded and fixed at the cut positions, so that the overall sea-side columns 1 and land-side columns 2 are raised, and the sea-side raising columns 5 and land-side raising columns 6 are lower than the connecting beam 3 between the sea-side columns 1 and land-side columns 2 on the same side.

[0050] The sea side heightened columns 5 and the land side heightened columns 6 on the same side are connected by horizontal circular tubes and node plates; the bottoms of the sea side heightened columns and the land side heightened columns on the same side are respectively connected to the middle position of the connecting beam through oblique circular tubes and node plates.

[0051] Two groups of sea-side diagonal braces 9 for reinforcing the trolley direction rigidity are respectively arranged between the sea-side lower cross beam 8 and the two groups of sea-side columns 1 below the cut-off position.

[0052] Two sets of land-side diagonal braces 11 for reinforcing the trolley direction stiffness are respectively arranged between the land-side lower crossbeam and the two sets of land-side columns below the cut-off position; wherein the ends of the sea-side diagonal braces and the land-side diagonal braces are fixedly connected to the corresponding lower crossbeam and columns respectively through node plates 74.

[0053] Specifically, the ends of the sea-side and land-side diagonal braces, as well as the horizontal circular tubes 71, the first oblique circular tubes 72, and the second oblique circular tubes 73, are equipped with mounting slots for the insertion and welding of gusset plates 74. 45° beveled edges are cut on both sides of the tube ends. After the circular tubes are welded to the connecting gusset plates, sealing plates are installed on the 45° edges for sealing. The edges of the sealing plates overlap the circular tube plates at 45° by 5mm, then welded and sealed. After installation, an airtightness kit 712 is installed on the sealing plates for airtightness testing to ensure that they meet airtightness requirements. This prevents moisture from entering the circular tubes, thereby preventing rust and effectively extending their service life.

[0054] An installation groove is opened on the round tube, a stress relief hole is opened at the bottom of the groove, and a stress relief hole sealing plate is covered, which can effectively release the stress on the round tube, thereby greatly reducing the risk of fatigue damage to the round tube and improving safety and service life.

[0055] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A shore container crane heightened gantry structure, characterized in that: include: Two groups of sea-side heightening columns are correspondingly arranged at the lower positions of the two groups of sea-side columns; Two sets of land-side heightened columns are correspondingly arranged at the lower positions of the two sets of land-side columns; Two sets of elevated sea-side and land-side connecting trusses are provided, and each set of elevated sea-side and land-side connecting trusses is correspondingly arranged between the sea-side elevated columns and the land-side elevated columns on the same side.

2. The shore container crane heightened gantry structure according to claim 1, characterized in that: The lower parts of the sea-side columns and the land-side columns are cut at the same height, and corresponding heightening columns are respectively installed at the cut positions.

3. The shore container crane heightened gantry structure according to claim 2, characterized in that: A connecting beam is provided between the sea side column and the land side column on the same side, and the connecting beam is close to and higher than the cut position; the elevated sea and land side connecting truss is provided between the connecting beam and the elevated column.

4. The shore container crane heightened gantry structure according to claim 3, characterized in that: Each group of the elevated sea and land side connecting trusses includes a group of horizontal circular tubes and two groups of oblique circular tubes; the two ends of the horizontal circular tubes are fixedly connected to the bottom end of the elevated column through a node plate; the two ends of each group of oblique circular tubes are respectively fixedly connected to the bottom end of the elevated column and the middle position of the connecting beam through a node plate.

5. The shore container crane heightened gantry structure according to claim 4, characterized in that: The end of the circular tube is provided with an installation groove for inserting the node plate, and oblique cutting edges are provided on both sides of the end of the circular tube. After the node plate is inserted into the installation groove, a sealing plate is used to seal it between the oblique cutting edge and the node plate.

6. The shore container crane heightened gantry structure according to claim 5, characterized in that: An airtight kit is installed on the sealing plate for performing an airtightness test; a stress relief hole is provided at the bottom of the installation groove, and a stress relief hole sealing plate is provided at the stress relief hole.

7. The shore container crane heightened gantry structure according to claim 3, characterized in that: The connecting cross beam is connected to the top of the sea side column and the top of the land side column through a portal support pipe.

8. The shore container crane heightened gantry structure according to claim 1, characterized in that: On the land side, the bottom of the land side column and the lower cross beam of the land side are connected by the land side diagonal brace that strengthens the rigidity in the trolley direction. On the sea side, the bottom of the sea side column and the lower cross beam of the sea side are connected by the sea side diagonal brace that strengthens the rigidity in the trolley direction. The top ends of the land side diagonal brace that strengthens the rigidity in the trolley direction and the sea side diagonal brace that strengthens the rigidity in the trolley direction are both lower than the heightened column.

9. The shore container crane heightened gantry structure according to claim 8, characterized in that: The land-side diagonal brace for reinforcing the trolley directional rigidity and the sea-side diagonal brace for reinforcing the trolley directional rigidity both include diagonal brace tubes, and both ends of the diagonal brace tubes are connected to the portal structure through node plates.

10. A method for raising the gantry of a shore container crane, characterized in that: The steps include: When raising the quay bridge, the lower parts of the two groups of sea-side columns and the two groups of land-side columns are cut at the same height, and the corresponding sea-side heightening columns and land-side heightening columns are fixedly installed at the cut-off positions; the sea-side heightening columns and land-side heightening columns are lower than the connecting beams between the sea-side columns and land-side columns on the same side; The seaside heightened columns and the landside heightened columns on the same side are connected by horizontal circular tubes and gusset plates; the bottoms of the seaside heightened columns and the landside heightened columns on the same side are respectively connected to the middle of the connecting beam by oblique circular tubes and gusset plates; Two sets of sea-side diagonal braces are respectively provided between the lower sea-side crossbeam and the two sets of sea-side columns below the cut-off position to strengthen the trolley direction rigidity; Two sets of land-side diagonal braces for reinforcing the trolley direction stiffness are respectively arranged between the land-side lower crossbeam and the two sets of land-side columns below the cut-off position; the ends of the sea-side diagonal braces and the land-side diagonal braces are fixedly connected to the corresponding lower crossbeam and columns through node plates.

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