Shore crane ladder-shaped frame supporting structure based on quay crane disassembly

Abstract

The utility model provides a quay crane ladder-shaped frame supporting structure based on quay crane disassembly. A quay crane comprises a ladder-shaped frame and a seaside upper cross beam connected with the ladder-shaped frame. The quay crane trapezoid frame supporting structure comprises a first supporting piece and a second supporting piece. Wherein the first supporting piece is connected with the trapezoidal frame; the second supporting piece is connected with the trapezoidal frame and the seaside upper cross beam. According to the quay crane ladder-shaped frame supporting structure based on quay crane disassembly, the stress balance of the ladder-shaped frame can be maintained under the disassembly working condition.

Description

Technical Field

[0001] The utility model relates to the technical field of quay cranes, in particular to a quay crane trapezoidal frame support structure based on quay crane disassembly. Background Art

[0002] A quay crane, also known as a shore container handling crane, is a device used to load and unload containers on ships at the shore. A quay crane consists of components such as a trolley, a portal frame, and front and rear girders. The trapezoidal structure of a quay crane is an important component of the quay crane steel structure. The trapezoidal structure of the quay crane stands on the sea side upper beam structure, and this structure is also called a trapezoidal frame.

[0003] With the renewal of terminal equipment, the demand for quay crane disassembly is increasing. The upper structure (including the front and rear girders, the trapezoidal frame, and the machine room, accounting for more than 55% of the total machine weight) is the most important functional area of the quay crane and is an important part of the disassembly work. Whether it is on-site disassembly or factory-return disassembly, its safety, reliability, and economy need to be fully considered.

[0004] However, in the modular disassembly scheme of the quay crane upper structure, since the connection point between the trapezoidal frame support pipe and the sea side upper beam is located at the end of the sea side upper beam, and the cutting point of the sea side upper beam is within the two support pipes, after the sea side upper beam is cut short, the trapezoidal frame will break due to unbalanced force, and the overall lowering and disassembly of the entire quay crane upper part cannot be achieved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a quay crane trapezoidal frame support structure based on quay crane disassembly, which can maintain the force balance of the trapezoidal frame under the disassembly working conditions.

[0006] The utility model provides a quay crane trapezoidal frame support structure based on quay crane disassembly. The quay crane includes the trapezoidal frame and the sea side upper beam connected to the trapezoidal frame; the quay crane trapezoidal frame support structure includes a first support member and a second support member; wherein, the first support member is connected to the trapezoidal frame; the second support member connects the trapezoidal frame and the sea side upper beam.

[0007] In one embodiment, the trapezoidal frame includes a first column support pipe and a second column support pipe, and the first column support pipe and the second column support pipe are connected to the sea side upper beam; the first support member includes a horizontal support pipe; one end of the horizontal support pipe is connected to the first column support pipe, and the other end of the horizontal support pipe is connected to the second column support pipe.

[0008] In one embodiment, the horizontal support pipe is arranged parallel to the sea side upper beam.

[0009] In one embodiment, the horizontal support pipe is welded between the first column support pipes; the horizontal support pipe is a steel pipe.

[0010] In one embodiment, the second support member includes a first diagonal support pipe; one end of the first diagonal support pipe is connected to the first column support pipe, and the other end of the first diagonal support pipe is connected to the sea side upper cross beam.

[0011] In one embodiment, the first diagonal support pipe is welded between the first column support pipe and the sea side upper cross beam; the first diagonal support pipe is a steel pipe.

[0012] In one embodiment, the second support member further includes a second diagonal support pipe; one end of the second diagonal support pipe is connected to the second column support pipe, and the other end of the second diagonal support pipe is connected to the sea side upper cross beam.

[0013] In one embodiment, the second diagonal support pipe is welded between the second column support pipe and the sea side upper cross beam; the second diagonal support pipe is a steel pipe.

[0014] In one embodiment, the first diagonal support pipe and the second diagonal support pipe are symmetrically arranged with respect to the sea side upper cross beam.

[0015] In one embodiment, four side pull steel wires are provided at the four corners of the door frame of the quay crane.

[0016] The quay crane ladder support structure based on the dismantling of the quay crane of the present utility model transfers the two force-bearing support points of the ladder from both ends of the sea side upper cross beam to the middle part directly opposite the girder by setting the first support member and the second support member, thereby forming a truss structure and establishing a new force balance system to ensure the force balance of the ladder under the dismantling condition and facilitate the separation of the entire upper structure of the quay crane from the door frame column. The structure of the present utility model is simple and compact, reasonably arranged, has a short on-site construction period, is safe and reliable, and can adapt to the transformation of most quay crane ladders. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, properties, and advantages of the present utility model will become more apparent from the following description in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic diagram of an embodiment of a quay crane of the quay crane ladder support structure based on the dismantling of the quay crane according to the present utility model;

[0019] Figure 2 is Figure 1 a first perspective side view of the quay crane shown;

[0020] Figure 3 is Figure 1 a second perspective side view of the quay crane shown;

[0021] Figure 4 is Figure 1 The overall stress nephogram of the quay crane structure after the upper crossbeam on the sea side of the quay crane shown in the figure. Detailed implementation manners

[0022] Now, reference will be made in detail to embodiments of the present invention, one or more examples of which are shown in the accompanying drawings. Each example is provided for the purpose of explaining the present invention, rather than limiting the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment can be used in combination with another embodiment to yield yet another embodiment. Accordingly, the present invention is intended to cover such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0023] As used herein, the terms "first" and "second" may be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of the respective components.

[0024] The quay crane, also known as the ship-to-shore container crane, is a device used to load and unload containers on a ship at the shore. The quay crane is composed of components such as a trolley, a portal frame, a front girder 10, and a rear girder 20, as Figure 1 shown. The trapezoidal structure of the quay crane is an important component of the quay crane steel structure. The trapezoidal structure of the quay crane is erected on the upper crossbeam structure on the sea side, and this structure is also called a trapezoidal frame 30.

[0025] Figures 1 to 3 shows the quay crane trapezoidal frame support structure based on the disassembly of the quay crane of the present invention. Among them, Figure 2 is Figure 1 the side view A of the quay crane shown in the figure, Figure 3 is Figure 1 the side view B of the quay crane shown in the figure.

[0026] The quay crane trapezoidal frame support structure based on the disassembly of the quay crane of the present invention can facilitate the disassembly of the upper structure of the quay crane. With the upgrading of terminal equipment, the demand for quay crane disassembly is increasing. The upper structure (including the front girder 10, the rear girder 20, the trapezoidal frame 30, and the machine room, accounting for more than 55% of the total machine weight) is the most important functional area of the quay crane and is an important part of the disassembly work. Whether it is disassembled on-site or returned to the factory for disassembly, its safety, reliability, and economy need to be fully considered.

[0027] The quay crane also includes an upper crossbeam, which includes a sea-side upper crossbeam 41 and a land-side upper crossbeam 42. The sea-side upper crossbeam 41 is located on the sea side of the quay crane (i.e., the side of the quay crane facing the ocean, usually close to the position where the ship docks). Relatively, the land-side upper crossbeam 42 is located on the land side of the quay crane (i.e., on the side of the quay crane facing away from the ocean, close to the land part of the port).

[0028] The ladder frame 30 is connected to the sea-side upper crossbeam 41, usually by welding.

[0029] When disassembling the upper structure of the quay crane, the sea-side upper crossbeam 41 and the land-side upper crossbeam 42 need to be cut, such as the sea-side upper crossbeam cutting position C shown in Figure 2 and the land-side upper crossbeam cutting position E shown in Figure 3 .

[0030] Refer to Figure 2 . The sea-side upper crossbeam cutting position C is inside the ladder frame 30. After the sea-side upper crossbeam 41 is cut, the ladder frame 30 connected to the sea-side upper crossbeam 41 may break at the ladder frame fracture position D shown in Figure 2 due to uneven force, affecting the disassembly of the upper structure.

[0031] The quay crane ladder frame support structure of the present utility model includes a first support member 100 and a second support member 200. The first support member 100 is connected to the ladder frame 30. The second support member 200 connects the ladder frame 30 and the sea-side upper crossbeam 41 to ensure that the ladder frame 30 will not break after the sea-side upper crossbeam 41 is cut.

[0032] The quay crane ladder frame support structure based on the disassembly of the quay crane of the present utility model, by setting the first support member 100 and the second support member 200, transfers the two force-bearing support points of the ladder frame 30 from both ends of the sea-side upper crossbeam 41 to the middle part facing the main beam, thereby forming a truss structure and establishing a new force balance system to ensure the force balance of the ladder frame 30 under the disassembly working condition, facilitating the separation of the entire upper structure of the quay crane from the doorframe column.

[0033] The structure of the present utility model is simple and compact, reasonably arranged, has a short on-site construction period, is safe and reliable, and can adapt to the transformation of most quay crane ladder frames 30.

[0034] As shown in Figure 2 , the ladder frame 30 includes a first column support pipe 31 and a second column support pipe 32, and the first column support pipe 31 and the second column support pipe 32 are connected to the sea-side upper crossbeam 41.

[0035] The first support member 100 includes a horizontal support pipe (hereinafter, the reference numeral 100 in the attached drawing represents the horizontal support pipe). One end of the horizontal support pipe 100 is connected to the first column support pipe 31, and the other end of the horizontal support pipe 100 is connected to the second column support pipe 32.

[0036] Furthermore, the horizontal support pipe 100 is arranged in parallel with the sea-side upper cross beam 41.

[0037] The specific position of the horizontal support pipe 100 is determined by the criterion that it does not interfere with other components during the descent of the upper structure of the quay crane.

[0038] Continue to refer to Figure 2 , the connection positions of the horizontal support pipe 100 with the first column support pipe 31 and the second column support pipe 32 are located at the middle position of the trapezoidal frame 30.

[0039] Optionally, the horizontal support pipe 100 is a steel pipe. Further, the horizontal support pipe 100 can adopt a steel pipe of φ500×8, and the steel pipe material is Q355B.

[0040] In one embodiment, the horizontal support pipe 100 is welded between the first column support pipe 31 and the second column support pipe 32 of the trapezoidal frame 30.

[0041] As Figure 2 shown, the number of the horizontal support pipes 100 is preferably one. If it is necessary to ensure the force balance of the trapezoidal frame 30, the number of the horizontal support pipes 100 can also be changed.

[0042] In one embodiment, the second support member 200 includes a first diagonal support pipe 210. One end of the first diagonal support pipe 210 is connected to the first column support pipe 31, and the other end of the first diagonal support pipe 210 is connected to the sea-side upper cross beam 41.

[0043] Optionally, the first diagonal support pipe 210 is a steel pipe. Further, the first diagonal support pipe 210 can adopt a steel pipe of φ800×10, and the steel pipe material is Q355B.

[0044] In one embodiment, the first diagonal support pipe 210 is welded between the first column support pipe 31 of the trapezoidal frame 30 and the sea-side upper cross beam 41.

[0045] The specific position of the first diagonal support pipe 210 is determined by the criterion that it does not interfere with other components during the descent of the upper structure of the quay crane.

[0046] On the basis of the above embodiments, the second support member 200 further includes a second diagonal support pipe 220. As Figure 2 shown, one end of the second diagonal support pipe 220 is connected to the second column support pipe 32, and the other end of the second diagonal support pipe 220 is connected to the shown sea-side upper cross beam 41.

[0047] Optionally, the second diagonal support pipe 220 is a steel pipe. Further, the second diagonal support pipe 220 can adopt a steel pipe of φ800×10, and the steel pipe material is Q355B.

[0048] The specific position of the second diagonal support pipe 220 is determined by the criterion that it does not interfere with other components during the descent of the upper structure of the quay crane.

[0049] As Figure 2 shown, the number of the first diagonal bracing pipes 210 is preferably one, and the number of the second diagonal bracing pipes 220 is preferably one. To ensure the force balance of the trapezoidal frame 30, the number of the horizontal bracing pipes 100 can also be changed.

[0050] Continuing to refer to Figure 2 , the first diagonal bracing pipes 210 and the second diagonal bracing pipes 220 are symmetrically arranged with respect to the sea-side upper cross beam 41.

[0051] In an embodiment, four side-pulling steel wires 300 are arranged at the four corners of the doorframe of the quay crane. Among them, the doorframe of the quay crane includes two sea-side columns and two land-side columns.

[0052] Preferably, the pre-tension of a single side-pulling steel wire 300 is 60t.

[0053] Figure 4 shows Figure 1 the overall force cloud diagram of the quay crane structure after the sea-side upper cross beam 41 of the quay crane shown in Figure 4 reveals the stress condition of the modeling analysis according to the force state of the whole quay crane structure after the sea-side upper cross beam 41 is divided.

[0054] As Figure 4 shown, calculated according to the total weight of the upper structure of 1600t, when the sea-side upper cross beam 41 and the land-side upper cross beam 42 are cut and separated, the axial force of each of the improved first diagonal bracing pipes 210 and the second diagonal bracing pipes 220 of the present invention is 45t. The axial force of the horizontal bracing rod is 20t, and at the same time, about 41t of diagonal tension side force is increased on the four columns (the pre-tension before cutting and separation is 60t, and the separated displacement at the unilateral cut is about 45mm after cutting).

[0055] It is calculated that the maximum tensile stress of the whole machine steel structure in this state is 111.4MPa. The materials of the newly added horizontal bracing pipes 100, the first diagonal bracing pipes 210 and the second diagonal bracing pipes 220 are Q355B steel pipes, and their yield strengths are all 355MPa. The safety factor is taken as 1.33, and the allowable stress is 267MPa.

[0056] Combined with the above structure and parameters, the calculation result is within the safe range, as Figure 4 shown.

[0057] It should be noted that the trapezoidal frame support structure of the quay crane of the present invention is only set before the upper structure of the quay crane is disassembled, that is, when the upper structure of the quay crane needs to be disassembled, the horizontal bracing pipes 100, the first diagonal bracing pipes 210, the second diagonal bracing pipes 220 and the side-pulling steel wires 300 are set at the corresponding positions above. When the upper structure of the quay crane does not need to be disassembled, the above components do not need to be set.

[0058] Combined with the quay crane trapezoidal frame support structure based on quay crane disassembly, the quay crane disassembly method is as follows, including steps S100 to S500:

[0059] In step S100, the front girder 10 of the quay crane is tilted at a certain angle so that the center of gravity G of the upper structure of the quay crane is located at the diagonal center of the sea-land side upper crossbeam 42, as Figure 1 shown.

[0060] In step S200, four side pull steel wires 300 are set at the four corners of the door frame of the quay crane. Among them, the pre-tension of a single side pull steel wire 300 is 60t, and the structural stress meets the requirements.

[0061] In step S300, a horizontal support pipe 100, a first diagonal support pipe 210, and a second diagonal support pipe 220 are arranged between the first column support pipe 31, the second column support pipe 32, and the sea side upper crossbeam 41. The connection structures of the horizontal support pipe 100, the first diagonal support pipe 210, and the second diagonal support pipe 220 are as described above.

[0062] In step S400, the trapezoidal frame 30, the round-to-square joint of the sea side upper crossbeam 41, and part of the pipes are cut off. Among them, the sea side upper crossbeam 41 and the land side upper crossbeam 42 are cut and separated.

[0063] Among them, the sea side upper crossbeam 41 is cut off at the sea side upper crossbeam cut-off point C as Figure 2 shown, and the land side upper crossbeam 42 is cut off and separated at the land side upper crossbeam cut-off point E as Figure 3 shown.

[0064] In step S500, the upper structure of the quay crane is disassembled.

[0065] The quay crane trapezoidal frame support structure based on quay crane disassembly of the present utility model can minimize the on-site cutting and welding workload. After the upper structure is lowered to the ground, it is convenient to disassemble and does not affect the disassembly of other components. The fabricated parts of the truss structure are convenient for transportation (such as container transportation), and the on-site construction workload is small and the construction period is short.

[0066] Although the present utility model is disclosed above with preferred embodiments, it is not used to limit the present utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present utility model. Therefore, any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. An onshore bridge trapezoidal frame support structure based on the disassembly of the onshore bridge. The onshore bridge includes the trapezoidal frame and the sea - side upper crossbeam connected to the trapezoidal frame; It is characterized in that The onshore bridge trapezoidal frame support structure includes a first support member and a second support member; wherein, The first support member is connected to the trapezoidal frame; The second support member connects the trapezoidal frame and the sea - side upper crossbeam.

2. The shore bridge trapezoidal frame support structure according to claim 1, characterized in that, The trapezoidal frame includes a first column support pipe and a second column support pipe; The first column support pipe and the second column support pipe are connected to the sea - side upper crossbeam; The first support member includes a horizontal support pipe; One end of the horizontal support pipe is connected to the first column support pipe, and the other end of the horizontal support pipe is connected to the second column support pipe.

3. The shore bridge ladder support structure according to claim 2, characterized in that, The horizontal support pipe is arranged parallel to the sea - side upper crossbeam.

4. The shore bridge trapezoidal frame support structure according to claim 2, characterized in that, The horizontal support pipe is welded between the first column support pipe and the first column support pipe; The horizontal support pipe is a steel pipe.

5. The shore bridge trapezoidal frame support structure according to claim 2, characterized in that, The second support member includes a first diagonal support pipe; One end of the first diagonal support pipe is connected to the first column support pipe, and the other end of the first diagonal support pipe is connected to the sea - side upper crossbeam.

6. The shore bridge ladder support structure according to claim 5, characterized in that The first diagonal support pipe is welded between the first column support pipe and the sea - side upper crossbeam; The first diagonal support pipe is a steel pipe.

7. The shore bridge trapezoidal frame support structure according to claim 5, characterized in that, The second support member further includes a second diagonal support pipe; One end of the second diagonal support pipe is connected to the second column support pipe, and the other end of the second diagonal support pipe is connected to the sea - side upper crossbeam.

8. The shore bridge ladder support structure according to claim 7, wherein The second diagonal support pipe is welded between the second column support pipe and the sea - side upper crossbeam; The second diagonal support pipe is a steel pipe.

9. The shore bridge ladder support structure according to claim 7, characterized in that, The first diagonal support pipe and the second diagonal support pipe are symmetrically arranged with respect to the sea - side upper crossbeam.

10. The shore bridge trapezoidal frame support structure according to any one of claims 1 to 9, characterized in that, Four side - pull steel wires are arranged at the four corners of the door frame of the onshore bridge.

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