Flat-end quay crane

Abstract

The utility model discloses a flat-end quay crane which comprises a girder, a seaside upper cross beam, a landside upper cross beam, a door frame structure, a machine room and a trolley system. The seaside upper cross beam and the landside upper cross beam are both arranged on the door frame structure; the girder is arranged on the seaside upper cross beam and the landside upper cross beam; the trolley system is arranged on the girder; the machine room is arranged on the landside upper cross beam and is used for driving the trolley system; the girder is of a truss structure. Aiming at the characteristics of short forward extension distance, small lifting height, relatively low working level and the like of the internal river shore bridge, the light-weight design of the internal river shore bridge is realized through the flat-end shore bridge disclosed by the utility model.

Description

Technical Field

[0001] The utility model relates to a port quay crane device, and more specifically, to a flat-top quay crane. Background Art

[0002] A shore container crane (hereinafter referred to as a quay crane) is used for loading and unloading containers, and mainly consists of a metal structure, a trolley, a spreader, a hoisting mechanism, trolley and gantry traveling mechanisms, and other accessories. The girder is connected to the lower part of the upper crossbeam by welding. The sea side extends outward above the cargo ship's cabin (referred to as the front girder), and the land side extends outward above the container truck lane outside the gantry (referred to as the rear girder). The trolley is hung on the track of the girder by wheels and can move along the track, and the spreader is connected through a wire rope system to realize the loading and unloading operation of the container.

[0003] For a conventional quay crane, the sea side outreach is relatively long (usually above 63 - 65 meters), and the rated container lifting weight is usually 65t, and some are even heavier. To reduce the deformation of the girder when the trolley hoists the container and improve the stiffness of the whole machine, a trapezoidal frame is arranged on the upper part of the upper crossbeam, and a tie rod is led out from the top of the trapezoidal frame to pull the extended part of the girder. For the rear girder, a tie rod is also led out from the top of the trapezoidal frame to pull the extended part of the rear girder. The front and rear tie rods and the trapezoidal frame, etc. are called the upper structure. The upper structure improves the force condition of the front and rear girders and is an effective way to solve the problem of large deformation (or large required design dimensions) of the front and rear girders in the cantilever state.

[0004] For the structure of the girder, there are mainly double box girder type, single box girder type, and truss girder type. The double box girder type has a large load-bearing capacity, relatively low manufacturing process, and relatively simple trolley design. The truss girder has a light structure and a low wind load in the working state, but has high requirements for the manufacturing process. The single box girder quay crane also has a larger load-bearing capacity and a relatively simple manufacturing process, but the trolley is more complex than that of the double box girder type quay crane.

[0005] The quay crane trolley system includes a traction trolley (the driving mechanism and the hoisting mechanism are in the machine room above the gantry), a self-propelled trolley (the driving mechanism is on the trolley, and the hoisting mechanism is in the machine room above the gantry), and a load-carrying trolley (both the driving mechanism and the hoisting mechanism are on the trolley). Among them, the traction trolley has the lightest structure, the self-propelled trolley is the second, and the load-carrying trolley has the largest weight because both the driving mechanism and the hoisting mechanism are arranged on the trolley. However, for the traction trolley, since both the driving mechanism and the hoisting mechanism are in the machine room, the amount of wire rope used is the largest. The self-propelled trolley saves the traction wire rope system compared with the traction trolley, and in the case of a heavy trolley, it not only saves the traction wire rope system but also arranges the hoisting mechanism on the trolley, so the amount of hoisting wire rope used is also the smallest.

[0006] The above are some situations of conventional quay cranes. In recent years, with the development of inland river terminals, some quay cranes suitable for inland river loading and unloading have emerged. Since inland river vessels are relatively narrow, the outreach of quay cranes is also relatively small, usually within 20 to 30 meters. In addition, the lifting height of inland river quay cranes is usually small, and the working class is usually low. Therefore, in terms of size, inland river quay cranes are much smaller than conventional quay cranes, but their overall structural composition is still similar to that of conventional quay cranes.

[0007] For inland river quay cranes, adopting a flat-top type of overall machine structure form can be regarded as a lightweight design idea. Similar structural types are mainly seen in the field of lattice boom cranes. For example, in an article "Flat-top Tower Cranes at Home and Abroad" reported by Jin Zhiyong in "Construction Mechanization" (2007.10); another example is an article "Overview of the Development and Characteristics of Flat-top Tower Cranes" (Yang Daohua, Xu Shudong) in "Proceedings of the New Technology Exchange Conference of the Construction Mechanization Branch of China Construction Machinery Industry Association" (Online Publication Date: June 28, 2010, Wanfang Platform), both of which involve the flat-top type of overall machine structure form. However, the flat-top type of overall machine structure form has not been applied in the field of port cranes at present. Summary of the Invention

[0008] Aiming at the deficiencies of the existing technology in the lightweight design of inland river quay cranes, the purpose of the present invention is to provide a flat-top quay crane. In view of the characteristics of short outreach, small lifting height, and relatively low working class of inland river quay cranes, through the flat-top quay crane of the present invention, the lightweight design of inland river quay cranes can be realized.

[0009] To achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A flat-top quay crane, comprising a girder, a sea-side upper crossbeam, a land-side upper crossbeam, a portal frame structure, a machine house, and a trolley system;

[0011] The sea-side upper crossbeam and the land-side upper crossbeam are both arranged on the portal frame structure;

[0012] The girder is arranged on the sea-side upper crossbeam and the land-side upper crossbeam;

[0013] The trolley system is arranged on the girder;

[0014] The machine house is arranged on the land-side upper crossbeam for driving the trolley system;

[0015] The girder adopts a truss structure.

[0016] Preferably, the truss structure adopts an unequal-height structure or an equal-height structure.

[0017] Preferably, the unequal-height structure adopts an unequal-height integral welded girder or an unequal-height multi-section articulated girder.

[0018] Preferably, the unequal-height integrally welded girder comprises:

[0019] The height of the unequal-height integrally welded girder near the middle position is greater than the height of the unequal-height integrally welded girder near the end position.

[0020] Preferably, the unequal-height multi-section articulated girder comprises standard sections and intermediate sections;

[0021] There are multiple standard sections with the same height, which are arranged near the end position of the unequal-height multi-section articulated girder;

[0022] There are multiple intermediate sections with a gradually changing height, which are arranged near the middle position of the unequal-height multi-section articulated girder;

[0023] The standard sections are articulated with each other, the intermediate sections are articulated with each other, and the standard sections are articulated with the intermediate sections.

[0024] Preferably, the equal-height structure adopts an equal-height integrally welded girder or an equal-height multi-section articulated girder.

[0025] Preferably, the equal-height multi-section articulated girder comprises multiple standard sections connected in sequence;

[0026] The standard sections are articulated with each other.

[0027] Preferably, the trolley system comprises a trolley, a spreader and a wire rope winding mechanism;

[0028] The trolley is connected to the spreader through the wire rope winding mechanism;

[0029] The wheels on the trolley are arranged on the lower chord of the girder.

[0030] Preferably, both the sea-side upper crossbeam and the land-side upper crossbeam are connected to the vertical web member of the girder through girder fixing rods.

[0031] Preferably, a trolley is provided at the bottom of the doorframe structure.

[0032] A flat-top quay crane provided by the present utility model simplifies the structure and structural stress of a traditional quay crane, and at the same time converts the stress of the front girder into a single cantilever beam model. When the trolley moves on the front girder, the girder will not have reverse bending, and the stress on the girder changes from the traditional alternating stress to only pulsating stress, improving the structural stress and enhancing the fatigue performance of the structure. Description of the Drawings

[0033] Figure 1 is a front view schematic diagram of the flat-top quay crane of the present utility model;

[0034] Figure 2 is the side view schematic diagram of the flat-top quay crane of the present utility model;

[0035] Figure 3 is the connection schematic diagram between the doorframe structure and the girder in the flat-top quay crane of the present utility model;

[0036] Figure 4 is the connection schematic diagram between the trolley system and the girder in the flat-top quay crane of the present utility model;

[0037] Figure 5 is the schematic diagram of the girder of the flat-top quay crane of the present utility model adopting an unequal-height integral welded girder;

[0038] Figure 6 is the schematic diagram of the girder of the flat-top quay crane of the present utility model adopting an unequal-height multi-segment articulated girder;

[0039] Figure 7 is the schematic diagram of the girder of the flat-top quay crane of the present utility model adopting an equal-height integral welded girder;

[0040] Figure 8 is the schematic diagram of the girder of the flat-top quay crane of the present utility model adopting an equal-height multi-segment articulated girder. Detailed implementation manners

[0041] In order to better understand the above technical solution of the present utility model, the technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0042] Combined with Figure 1 shown, a flat-top quay crane provided by the present utility model includes a girder 1, a sea-side upper crossbeam 2, a land-side upper crossbeam 3, a doorframe structure 4, a machine house 5 and a trolley system 8.

[0043] The sea-side upper crossbeam 2 and the land-side upper crossbeam 3 are both installed on the doorframe structure 4.

[0044] The girder 1 is suspended and fixed on the sea-side upper crossbeam 2 and the land-side upper crossbeam 3.

[0045] The trolley system 8 is installed on the girder 1.

[0046] The machine house 5 is installed on the land-side upper crossbeam 3, and drives the movement of the trolley system 8 on the girder 1 and the lifting and lowering actions of the spreader 13 by winding and unwinding steel wire ropes. Combining the grasping and releasing actions of the spreader 13 on the container, the loading and unloading of the container is realized.

[0047] The bottom of the doorframe structure 4 is installed with a trolley 6.

[0048] Combined with Figure 2 and Figure 3As shown in the figure, the sea - side upper cross - beam 2 and the land - side upper cross - beam 4 are connected to the upper chord 9 of the girder. The specific connection method can be achieved by hinging the ear plates set on the sea - side upper cross - beam 2 and the land - side upper cross - beam 4 with the ear plates set on the upper chord 9, or by welding the two with ear plates. To further fix the girder 1 and prevent it from undergoing lateral torsion, the sea - side upper cross - beam 2 and the land - side upper cross - beam 3 are respectively connected and fixed to the web member 11 between the lower chord 10 of the girder 1 through the girder fixing rod 7.

[0049] Combined with Figure 4 As shown in the figure, the trolley system 8 includes a trolley 12, a spreader 13, and a wire rope winding mechanism 14. The trolley 12 is connected to the spreader 13 through the wire rope winding mechanism 14, and the lifting of the spreader 13 is realized by winding and unwinding the wire rope. The trolley 12 is hung on the lower chord 10 of the girder 1 through wheels. The lower chord 10 supports the wheels by directly supporting the wheels or by welding square steel rails on the upper surface, thus realizing the walking function of the trolley 12 along the girder 1. Through the walking of the trolley 12 along the direction of the girder 1 and combined with the lifting of the spreader 13, the loading and unloading operation of the container is completed.

[0050] The trolley system 8 adopts a traction type (both the driving mechanism and the lifting mechanism are placed in the machine room 5). The traction rope is led out from the machine room 5 placed on the land - side upper cross - beam 2, and the operation of the trolley system 8 and the hoisting operation of the container are realized by winding and unwinding the wire rope. The traction type trolley is relatively light, which is beneficial to further realizing the light weight of the whole machine. If considering reducing the amount of wire rope used or simplifying the wire rope system, etc., the trolley system 8 can also adopt a self - propelled type (the driving mechanism is placed on the trolley 12 and the lifting mechanism is placed in the machine room 5), or a load - carrying type (both the driving mechanism and the lifting mechanism are placed on the trolley 12).

[0051] The girder 1 adopts a truss structure with a triangular cross - section, and can also adopt a truss form with a rectangular or trapezoidal cross - section. The lower chord 10 of the girder 1 adopts a rectangular pipe or a round pipe. When using a rectangular pipe, the rectangular pipe can be directly used as a track, or square steel can be directly welded on the rectangular pipe as a track to further improve the bearing capacity; when the lower chord 10 adopts a round pipe, a track and a rail - supporting beam need to be laid on the round pipe (this can be achieved by referring to the existing track - laying technology for truss round - pipe truss structures in the port machinery industry).

[0052] The truss structure can adopt an unequal - height structure or an equal - height structure.

[0053] The unequal - height structure is specifically designed as follows: The truss height of each section of the girder 1 is designed differently according to the total overhanging length and its own position. For the girder extending seaward from the sea - side door frame, the truss height at the door - frame part is larger, while the truss height at the outermost far - end is smaller, and the middle section is connected by a truss with variable height. For the girder extending landward from the land - side door frame, due to the overall overhanging dimension being not much, a truss with a unified height can be adopted, or a truss with variable height can also be adopted.

[0054] The girder 1 can be set with different beam heights in the length direction, but the lower chord 10 always remains at the same height to ensure the smooth operation of the trolley system 8. The height of the girder 1 is achieved by adjusting the height of the upper chord 9. The girder 1 can also be set in the form of a constant-height cross-section. When the height of the girder 1 is set differently according to the position, the following principles are followed: For the front girder (the part of the girder extending from the doorframe to the sea side), the height at the outermost distal end is the smallest, the height is the largest near the doorframe, and the beam height in the middle section is transitioned with a linearly varying beam height.

[0055] The unequal-height structure can adopt an unequal-height integral welded girder or an unequal-height multi-section articulated girder.

[0056] Combined with Figure 5 As shown, the unequal-height integral welded girder includes:

[0057] The height of the unequal-height integral welded girder near the middle position is greater than the height of the unequal-height integral welded girder near the end position.

[0058] Combined with Figure 6 As shown, the unequal-height multi-section articulated girder includes a standard section 15 and an intermediate section 16.

[0059] There are multiple standard sections 15 with the same height setting, located near the end position of the unequal-height multi-section articulated girder.

[0060] There are also multiple intermediate sections 16 with a gradually changing height, located near the middle position of the unequal-height multi-section articulated girder.

[0061] Between the standard section 15 and the standard section 15, between the intermediate section 16 and the intermediate section 16, and between the standard section 15 and the intermediate section 16, two hinge points 17 and 18 are used for articulation up and down.

[0062] The equal-height structure can adopt an equal-height integral welded girder 21 (as shown in Figure 7 ) or an equal-height multi-section articulated girder.

[0063] Combined with Figure 8 As shown, the equal-height multi-section articulated girder includes multiple sequentially connected standard sections 22.

[0064] Between the standard section 22 and the standard section 22, two hinge points are used for articulation up and down.

[0065] For the standard section 15 or the standard section 22 used on the girder 1, the standard section 15 / standard section 22 with equal cross-section heights on both sides can be adopted, and the overall length of the girder 1 can be quickly adjusted by increasing or decreasing the number of the standard section 15 / standard section 22.

[0066] The standard section 15 / standard section 22 can be set in two or several models according to the dimensions, which is convenient for inserting at different positions of the girder 1. By inserting the standard section 15 / standard section 22 or increasing the quantity of the standard section 15 / standard section 22, the increase of the length of the girder 1 can be realized; by removing the standard section 15 / standard section 22 or reducing the quantity of the standard section 15 / standard section 22, the shortening of the length of the girder 1 can be realized. The adjustment of the length of the girder 1 improves the adaptability of the quay crane on the wharf.

[0067] The tie rod structure of the traditional conventional quay crane plays a role in pulling the cantilever section of the girder. When the trolley system moves on the front girder (the part of the girder extending outward from the portal frame structure to the sea side), the stress models of the girder in the sections inside and outside the tie rod are simply supported beam and cantilever beam models respectively. As the trolley passes through the position of the tie rod hinge point, the girder will have an inflection along the tie rod hinge point, which will lead to alternating stress on the girder. However, for the flat-top quay crane of the present utility model, the stress of the front girder is transformed into a single cantilever beam model. When the trolley system 8 moves on the girder 1, the girder 1 will not have an inflection, and the stress on the girder 1 changes from the traditional alternating stress to only pulsating stress, improving the stress of the structure and enhancing the fatigue performance of the structure.

[0068] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present utility model and are not used to limit the present utility model. As long as it is within the scope of the substantial spirit of the present utility model, the changes and modifications of the above embodiments will fall within the scope of the claims of the present utility model.

Claims

1. A flat-end quay crane, characterized in that: Including the main beam, sea side upper beam, land side upper beam, door frame structure, machine room and trolley system; The sea side upper cross beam and the land side upper cross beam are both arranged on the door frame structure; The beam is arranged on the sea side upper beam and the land side upper beam; The trolley system is arranged on the beam; The machine room is arranged on the upper beam on the land side and is used to drive the trolley system; The beam adopts a truss structure.

2. The flat-end quay crane according to claim 1, characterized in that: The truss structure adopts an unequal height structure or an equal height structure.

3. The flat-end quay crane according to claim 2, characterized in that: The unequal height structure adopts an unequal height integral welded beam or an unequal height multi-section articulated beam.

4. The flat-end quay crane according to claim 3, characterized in that: The unequal height integrally welded beam comprises: The height near the middle position of the unequal height integral welded beam is greater than the height near the end position of the unequal height integral welded beam.

5. The flat-end quay crane according to claim 3, characterized in that: The unequal height multi-section articulated beam includes a standard section and an intermediate section; There are a plurality of standard sections, which are arranged at the same height and are arranged near the end of the unequal height multi-section articulated beam; There are multiple intermediate sections, with gradually changing heights, which are arranged near the middle position on the unequal height multi-section articulated beam; The standard sections are hinged to each other, the intermediate sections are hinged to each other, and the standard sections are hinged to the intermediate sections.

6. The flat-end quay crane according to claim 2, characterized in that: The equal-height structure adopts an equal-height integral welded beam or an equal-height multi-section articulated beam.

7. The flat-end quay crane according to claim 6, characterized in that: The equal-height multi-section articulated beam comprises a plurality of standard sections connected in sequence; The standard sections are hinged to each other.

8. The flat-end quay crane according to claim 1, characterized in that: The trolley system includes a trolley, a sling and a wire rope winding mechanism; The trolley is connected to the sling via the wire rope winding mechanism; The wheels on the trolley are arranged on the lower chord of the beam.

9. The flat-end quay crane according to claim 1, characterized in that: The sea side upper cross beam and the land side upper cross beam are both connected to the straight web bars of the beam through beam fixing rods.

10. The flat-end quay crane according to claim 1, characterized in that: A large vehicle is provided at the bottom of the door frame structure.

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