Annular girder quay crane

Abstract

The utility model discloses an annular girder quay crane which comprises a girder, an upper cross beam, a door frame, a trolley system and an upper structure, the upper cross beam is arranged on the door frame, the girder is arranged on the upper cross beam, the trolley system is arranged on the girder, and the upper structure is arranged on the door frame and connected with the girder. The girder is arranged to be an annular girder, and an annular rail is arranged on the upper surface of the girder. And the trolley system runs along the track. The problem that an existing quay crane with the annular girder is difficult to implement and land is solved.

Description

Technical Field

[0001] The utility model relates to a port quay crane device, and more specifically, to a quay crane with a circular girder. Background Art

[0002] A quay 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. Among them, the metal structure includes a girder, a portal frame, an upper crossbeam, and an upper structure (the part above the girder). The girder is arranged perpendicular to the coastline (or riverbank line), extending from above the sea-side cargo ship to above the land-side container truck. The trolley can move along the track laid on the girder to a specific position. The whole machine can move along the track parallel to the coastline (or riverbank line). Through the movement of the whole machine and the movement of the trolley, the trolley and the spreader thereon can reach the container position, thereby realizing the function of loading and unloading containers.

[0003] Generally speaking, quay cranes are divided into single-box girder type, double-box girder type, and truss type. Regardless of the type, there is mostly only one trolley on the girder of a quay crane. The operation process of the trolley is as follows:

[0004] (1) Empty trolley traveling: The empty trolley runs to the container position;

[0005] (2) Container grasping: Lower the spreader onto the container, grasp the container through the twist locks on the spreader, and then lift the container by raising the spreader;

[0006] (3) Loaded trolley traveling: The trolley moves along the girder with the container to the designated position;

[0007] (4) Container discharging: Lower the spreader to the designated position, release the twist locks, and realize container discharging.

[0008] Among them, step (2) can be grasping the container from the cargo ship. At this time, the corresponding step (4) is placing the container on the container truck. At this time, the process (1)-(2)-(3)-(4) is called ship unloading.

[0009] If step (2) is grasping the container from the container truck, at this time, the corresponding step (4) is placing the container on the cargo ship. At this time, the process (1)-(2)-(3)-(4) is called ship loading.

[0010] Among them, step (1) is an empty-load travel, and step (3) is a loaded travel. If one of these two steps is called the outbound journey, the other is called the return journey. In the actual operation process, (1) and (2), (3) and (4) are usually linked to a certain extent to improve the operation efficiency.

[0011] The above is the description of the working conditions for a trolley to complete the container loading and unloading operations. For a double-trolley quay crane with a transfer platform, a transfer platform is provided between the container truck and the cargo ship. The main trolley on the girder completes the loading and unloading operations from the cargo ship to the transfer platform, and the rear gantry trolley completes the loading and unloading operations from the transfer platform to the container truck. For each trolley, the operation mode is the alternation of no-load travel and loaded travel.

[0012] It can be seen that for traditional quay cranes, during the process of a trolley hoisting a container, it must go through a no-load travel and a loaded travel. For the loading and unloading of multiple containers, it must go through the alternation process of the trolley's no-load travel and loaded travel.

[0013] In the existing patent applications, for example, the patent application No. 200610037155.8 discloses a ring-type cantilever container crane, which proposes a quay crane with a ring-shaped girder and can realize the uninterrupted operation of the trolley hoisting containers. However, this patent does not elaborate on the problems in the specific implementation of the trolley and does not mention how to achieve the trolley in the turning area of the ring track. Therefore, the key technologies in the actual operation of the trolley on the ring-shaped girder have not been solved.

[0014] For example, the patent application No. 201110141966.3 discloses a port continuous loop type quay container crane, which is a loop type quay container crane composed of a main girder and an auxiliary girder. This crane can realize the continuous operation of multiple trolleys hoisting containers. Since its main girder is arranged within the doorframe, and the auxiliary girder is arranged on the overhanging structure outside the doorframe. Therefore, the disadvantage is that it can only run the loaded travel on the main girder and the no-load travel on the auxiliary girder, and there are also certain limitations in the planning of the hoisting path.

[0015] For example, the patent application No. 201911182146.1 discloses a quay crane for cyclic loading and unloading and a cyclic loading and unloading method. Its single girder is formed by connecting two box girders together at the upper part and laying tracks below to ensure the passage of the trolley. It can realize the uninterrupted operation of container hoisting. However, due to the complex connection structure at the upper part of the girder, there are certain difficulties in manufacturing.

[0016] In summary, for solving the problem of continuous hoisting operation of loading and unloading containers, the currently visible utility model patents are the ring-type cantilever quay crane solutions. However, some of these patented technologies do not consider the problem of the trolley turning on the ring-shaped girder, and some do not consider the manufacturing difficulty, and they are all difficult to be the best solutions to solve the continuous loading and unloading problem. Utility Model Content

[0017] Aiming at the defects existing in the prior art, the purpose of the present utility model is to provide a quay crane with a ring-shaped girder, which solves the problems of difficult implementation and landing of the current quay crane with a ring-shaped girder.

[0018] To achieve the above object, the utility model adopts the following technical solutions:

[0019] An annular girder quay crane includes a girder, an upper crossbeam, a portal frame, a trolley system and an upper structure. The upper crossbeam is arranged on the portal frame, the girder is arranged on the upper crossbeam, the trolley system is arranged on the girder, and the upper structure is arranged on the portal frame and connected to the girder.

[0020] The girder is set as an annular girder, and an annular track is provided on its upper surface.

[0021] The trolley system runs along the track.

[0022] Preferably, the girder includes a straight section and an arc section.

[0023] There are two straight sections, which are arranged in parallel.

[0024] There are two arc sections. One end of one arc section is respectively connected to one end of the two straight sections, and the other end of the other arc section is respectively connected to the other end of the two straight sections to form the annular girder.

[0025] Preferably, there are two tracks.

[0026] One of the tracks is arranged close to the outside of the annular girder, and the other track is arranged close to the inside of the annular girder.

[0027] Preferably, the girder adopts a single box girder.

[0028] Preferably, there are two or more trolley systems, all of which include a trolley and a spreader mechanism. The trolley is connected to the spreader mechanism by a steel wire rope.

[0029] Preferably, the wheelbase D1 between the wheels of the trolley running along the track close to the inside of the annular girder is less than the wheelbase D2 between the wheels of the trolley running along the track close to the outside of the annular girder.

[0030] Preferably, the height of the spreader mechanism on each trolley system is set to different heights.

[0031] Preferably, the upper crossbeam includes a sea-side upper crossbeam and a land-side upper crossbeam.

[0032] The annular girder quay crane provided by the utility model arranges tracks on both sides of the single box girder, effectively avoiding the bending moment around the rotation center of the box girder caused by the single-sided arrangement of tracks in the traditional box girder, and improving the stress of the girder. Moreover, due to the structure of the single box girder, the transverse dimension is smaller than that of the traditional double box girder, thus reducing the requirement of the annular girder quay crane for the clear width of the portal frame. By arranging more than two trolley systems, the continuous loading and unloading of containers can be realized. Since after one trolley hoists a container, without waiting for its no-load return time, the next trolley can immediately hoist the next container. Since the trolley changes from a reciprocating motion process to a sequential motion process of multiple trolleys, the loading and unloading efficiency is improved. Brief Description of the Drawings

[0033] Figure 1 is the overall machine schematic diagram of the annular girder quay crane of the utility model;

[0034] Figure 2 is the structural schematic diagram of the girder in the annular girder quay crane of the utility model;

[0035] Figure 3 is the schematic diagram of the single box girder adopted for the girder in the annular girder quay crane of the utility model;

[0036] Figure 4 is the schematic diagram of three sets of trolley systems provided in the annular girder quay crane of the utility model;

[0037] Figure 5 is the schematic diagram of the spreader mechanisms on the trolley systems in the annular girder quay crane of the utility model being set at different heights;

[0038] Figure 6 is the schematic diagram of the first step during continuous ship unloading operation in the usage method of the annular girder quay crane of the utility model;

[0039] Figure 7 is the schematic diagram of the second step during continuous ship unloading operation in the usage method of the annular girder quay crane of the utility model;

[0040] Figure 8 is the schematic diagram of the third step during continuous ship unloading operation in the usage method of the annular girder quay crane of the utility model;

[0041] Figure 9 is the schematic diagram of the first step during continuous ship loading operation in the usage method of the annular girder quay crane of the utility model;

[0042] Figure 10 is the schematic diagram of the second step during continuous ship loading operation in the usage method of the annular girder quay crane of the utility model;

[0043] Figure 11 is the schematic diagram of the third step during continuous ship loading operation in the usage method of the annular girder quay crane of the utility model;

[0044] Figure 12 It is a schematic diagram of the inner and outer wheel distances of the trolley on the annular girder quay crane of the present utility model. Specific embodiments

[0045] In order to better understand the above technical solutions of the present utility model, the technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] Combined with Figure 1 As shown, a kind of annular girder quay crane provided by the present utility model includes a girder 1, upper crossbeams (including a sea-side upper crossbeam 2 and a land-side upper crossbeam 3), a door frame 4, a trolley system 5 and an upper structure 8. The upper crossbeams are installed on the door frame 4, the girder 1 is suspended on the upper crossbeams, the trolley system 5 is installed on the girder 1, and the upper structure 8 is installed on the door frame 4 and connected to the girder 1. Among them:

[0047] The girder 1 is set as an annular girder, and an annular track 10 is laid on its upper surface.

[0048] The trolley system 5 is provided with two or more, and each includes a trolley 6 and a spreader mechanism 7. The trolley 6 is connected to the spreader mechanism 7 by a steel wire rope.

[0049] The trolley 6 can run along the track 10.

[0050] Combined with Figure 2 And Figure 3 As shown, the girder 1 includes a straight section 11 and an arc section 12.

[0051] The straight section 11 has two sections, which are of the same length and arranged in parallel, and both extend from the sea-side upper crossbeam 2 to the land-side upper crossbeam 3.

[0052] The arc section 12 also has two sections. Among them, the two ends of one arc section 12 are respectively connected to one end of the two straight sections 11, and the two ends of the other arc section 12 are respectively connected to the other end of the two straight sections 11 to form an annular girder.

[0053] The girder 1 adopts a single box girder 9, and there are two tracks 10. The two tracks 10 are laid on both sides of the single box girder 9. Arranging the tracks 10 on both sides of the single box girder 9 effectively avoids the moment around the rotation center of the box girder caused by the unilateral arrangement of the track in the traditional box girder, and improves the stress of the girder. And due to the structure of the single box girder 9, the transverse dimension is smaller than that of the traditional double box girder, so the requirement for the clear width of the door frame 4 of the annular girder quay crane of the present utility model is reduced.

[0054] Combined with Figure 12As shown, among the two tracks 10, one track 10 is arranged near the outer side of the annular girder, and the other track is arranged near the inner side of the annular girder. Since the inner track turning radius (R1) of the circular arc section 12 on the annular girder is smaller than the outer turning radius (R2) of the circular arc section 12. Therefore, the wheelbase D1 between the wheels of the trolley 6 running along the track 10 near the inner side of the annular girder is smaller than the wheelbase D2 between the wheels running along the track 10 near the outer side of the annular girder. The wheelbases of the inner and outer wheels of the trolley 6 (referring to the wheels on the inner and outer tracks of the girder respectively) are set to be unequal. In this way, it can be ensured that when the trolley 6 turns, even when the turning radii of the inner and outer track gauges are different, the wheels of the trolley 6 can still run well on the track 10, thereby ensuring that the trolley 6 can perform a smooth turning motion at the circular arc section 12. Since the circular arc section 12 at the end of the girder 1 connects the two straight sections 11 into a whole, under the action of the trolley system 5 and the container load, the force on the girder 1 is transformed from the force on a single beam in the traditional way to the common force of two beams (two straight sections 11 and two circular arc sections 12), improving the force condition of the single beam.

[0055] Combined with Figure 4 As shown, more than two load-carrying trolley systems 5 are arranged on the girder 1 to achieve uninterrupted loading and unloading of containers. Since after one trolley system 5 hoists a container, without waiting for its no-load return time, the next trolley system 5 can immediately hoist the next container. The operation process of the traditional single trolley system changes from a reciprocating motion process to the sequential motion process of the multiple trolley systems 5 of the present invention, improving the loading and unloading efficiency.

[0056] Combined with Figure 5 As shown, considering the problem of avoiding interference when the trolley 6 runs on the annular girder and also considering structural compactness, by setting the usage requirements, the height of the lifting mechanism 7 of each trolley system 5 on the girder 1 is set to different heights (such as Figure 5 shown as one high and one low). In this way, the containers on the trolleys 6 on one girder 1 do not interfere with the steel wire ropes on the opposite trolley 6 and leave a certain clearance ( Figure 5 the middle clearance in Figure 5 ). After leaving clearances between the containers lifted by the trolleys 6 on the two girders 1 and their adjacent portal legs (

[0057] the left clearance and the right clearance in Figure 5 ), the minimum width of the door frame 4 is determined. On the premise of ensuring that the lifting mechanism 7 and the container do not interfere during the operation of the trolley 6, the width of the door frame 4 is minimized as much as possible, specifically based on the fact that the container lifted under one girder 1 does not collide with the steel wire ropes under the other girder 1. Since the size of the door frame 4 is further saved, the force on the door frame 4 is improved.

[0057] The connection of the circular arc section 11 on the annular girder, the radius of the circular arc section 11 must first meet Figure 5The clearance requirement between the container on one girder 1 and the steel wire rope on the other girder 1 is as follows. Secondly, it is also necessary to meet the requirement of the minimum turning radius determined by the front and rear wheel distances and the wheel deflection angles of the trolley 6. Finally, the arc radius is determined by the larger of the above two.

[0058] The usage method of the quay crane with a circular girder of the present utility model realizes uninterrupted ship unloading operation and ship loading operation by multiple trolley systems 5 running along the circular girder. Specifically as follows:

[0059] (1) Continuous ship unloading operation, the three trolley systems 5 on the circular girder move in the arrow direction;

[0060] Step 1: As Figure 6 shown, the No. 1 trolley system 51 first arrives at the cabin position A, hoists the container and then starts to move towards the truck position B; at this time, the No. 2 trolley system 52 and the No. 3 trolley system 53 are empty trolleys.

[0061] Step 2: As Figure 7 shown, the No. 1 trolley system 51 first arrives at the truck position B, and then unloads the container onto the truck; at this time, the No. 2 trolley system 52 arrives at the cabin position A, hoists the container on the cargo ship, and the No. 3 trolley system 53 follows as an empty trolley and moves towards the ship unloading position.

[0062] Step 3: As Figure 7 shown, after the No. 1 trolley system 51 unloads the container, it continues to move towards the cabin position A; at this time, the No. 2 trolley system 52 arrives at the truck position B and then unloads the container, and the No. 3 trolley system 53 arrives at the cabin position A at this time and hoists the container and moves towards the land-side truck position B.

[0063] (2) Continuous ship loading operation, the three trolley systems 5 on the circular girder move in the arrow direction shown in the figure;

[0064] Step 1: As Figure 9 shown, the No. 1 trolley system 51 first arrives at the truck position B, hoists the container and then starts to move towards the sea-side cabin position A; at this time, the No. 2 trolley system 52 and the No. 3 trolley system 53 are empty trolleys.

[0065] Step 2: As Figure 10 shown, the No. 1 trolley system 51 arrives at the cabin position A, and then places the container into the cabin; at this time, the No. 2 trolley system 52 arrives at the truck position B and hoists the container, and then moves towards the cabin position A. At this time, the No. 3 trolley system 53 is still an empty trolley and moves towards the truck position.

[0066] Step 3: As Figure 11As shown, after the No. 1 trolley system 51 arrives at the position where the container is unloaded into the cabin, it continues to move towards the container truck position; subsequently, the No. 2 trolley system 52 arrives at the cabin position A. At this time, the No. 3 trolley system 53 arrives at the container truck position. After lifting the container, it also moves towards the cabin position A.

[0067] The above is the process description of the continuous operation of the three trolley systems 5. For the situation of other multiple trolley systems 5, the operation process is similar. Compared with the traditional quay crane where a complete empty trolley travel must be included in one ship unloading or loading process, the continuous operation of multiple trolleys in the present invention avoids the time of waiting for a complete empty trolley travel. After one trolley hoists the container, another empty trolley can quickly arrive at the hoisting position for operation, which can theoretically significantly improve the operation efficiency.

[0068] In addition, the above Figures 6 to 11 describes the situation where the fully loaded trolleys run on the lower girder and the empty trolleys run on the upper girder. In fact, if the running direction of the trolleys is changed to the opposite direction of the arrow shown in the figure, it is possible to achieve the situation where the fully loaded trolleys run on the upper girder and the empty trolleys run on the lower girder. Since the present invention can load and unload containers under any one of the girders, the adaptability is increased.

[0069] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention and are not used to limit the present invention. As long as it is within the scope of the essential spirit of the present invention, the changes and modifications of the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A ring-shaped beam quay crane, comprising a beam, an upper beam, a door frame, a trolley system and an upper structure, wherein the upper beam is arranged on the door frame, the beam is arranged on the upper beam, the trolley system is arranged on the beam, the upper structure is arranged on the door frame and connected to the beam, characterized in that: The beam is configured as an annular beam, and an annular track is provided on its upper surface; The trolley system runs along the track.

2. The annular beam quay bridge according to claim 1, characterized in that: The beam comprises a straight line segment and an arc segment; The straight line segment is provided with two segments, which are arranged in parallel; The arc segment is provided with two sections, wherein two ends of one arc segment are respectively connected to one end of the two straight line segments, and two ends of the other arc segment are respectively connected to the other end of the two straight line segments, so as to form the annular beam.

3. The annular beam quay bridge according to claim 2, characterized in that: The track is provided with two tracks; Among them, one of the tracks is arranged close to the outer side of the annular beam, and the other track is arranged close to the inner side of the annular beam.

4. The annular beam quay bridge according to claim 2, characterized in that: The beam adopts a single box beam.

5. The annular beam quay bridge according to claim 3, characterized in that: The trolley system is provided with more than two units, each of which comprises a trolley and a sling mechanism, and the trolley is connected to the sling mechanism via a steel wire rope.

6. The annular beam quay bridge according to claim 5, characterized in that: The wheelbase D1 between the wheels of the trolley running along the track close to the inner side of the annular beam is smaller than the wheelbase D2 between the wheels running along the track close to the outer side of the annular beam.

7. The annular beam quay bridge according to claim 5, characterized in that: The height of the sling mechanism on each trolley system is set to a different height.

8. The annular beam quay bridge according to claim 1, characterized in that: The upper cross beam comprises a sea side upper cross beam and a land side upper cross beam.

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