CN113148835A - Mounting method of main beam assembly of telescopic shore bridge and telescopic shore bridge - Google Patents
Mounting method of main beam assembly of telescopic shore bridge and telescopic shore bridge Download PDFInfo
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- CN113148835A CN113148835A CN202110482587.4A CN202110482587A CN113148835A CN 113148835 A CN113148835 A CN 113148835A CN 202110482587 A CN202110482587 A CN 202110482587A CN 113148835 A CN113148835 A CN 113148835A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
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Abstract
The application provides an installation method of a main beam assembly of a telescopic shore bridge and the telescopic shore bridge. The mounting method of the main beam assembly comprises the following steps: sleeving a frame-shaped first support structure on the outer side of the main beam; the main beam and the first supporting structure are fastened through the flexible fastening structure, wherein the flexible fastening structure can provide flexible connection between the main beam and the first supporting structure at least in the length direction of the main beam; and hoisting the tied main beam assembly to a door frame structure of the telescopic shore bridge. This application is consolidated girder subassembly temporarily through flexible tying structure, can cushion the impact load who arouses by the asynchronous hoisting point velocity of motion, improves the connection reliability between girder and the sea side bearing structure.
Description
Technical Field
The application relates to the technical field of steel structure manufacturing, in particular to a mounting method of a main beam assembly of a telescopic shore bridge and the telescopic shore bridge.
Background
As global trade continues to evolve, the size of container ships continues to increase. A shore bridge (also referred to as a "shore container crane") has been increasing in size as an important equipment for loading and unloading containers in ports. For example, the height, track gauge, reach-ahead distance, reach-behind distance, etc. of the whole quay crane are increasing continuously to better meet the market demand.
In some ports, public facilities such as an organic farm around the port have high and limited requirements for surrounding buildings, large equipment (e.g., a shore bridge), and the like. In order to meet the height limit requirements of the public facilities, the telescopic shore bridge is produced. Unlike other types of shore bridges (e.g., luffing shore bridges), the main beam of the telescopic shore bridge does not produce a pitching motion in a vertical plane, and therefore, the telescopic shore bridge has a smaller height relative to other forms of shore bridges, so that the height limit requirements of the above-mentioned public facilities can be met (thus, the telescopic shore bridge is also called "low-attitude telescopic shore bridge").
In the installation process of the telescopic shore bridge, a cart travelling mechanism and a door frame structure of the shore bridge are firstly installed, and then a main beam assembly of the shore bridge is installed on the door frame structure. In the installation process of the main beam assembly, temporary reinforcing structures such as supporting rods are adopted to temporarily reinforce the main beam assembly. However, in the hoisting process of the main beam, when the moving speeds of the hooks of the cranes are not synchronous, it is difficult to ensure the reliability of the temporary reinforcing structure.
Disclosure of Invention
The embodiment of the application provides an installation method of a main beam assembly of a telescopic shore bridge and the telescopic shore bridge.
In a first aspect, an embodiment of the present application provides a method for installing a main beam assembly of a telescopic shore bridge, where the main beam assembly includes a main beam of the telescopic shore bridge and a frame-shaped first support structure; the mounting method is used for mounting the main beam assembly to a door frame structure of the telescopic shore bridge; the mounting method of the main beam assembly comprises the following steps: the frame-shaped first support structure is sleeved on the outer side of the main beam, when the first support structure is sleeved on the outer side of the main beam, the first support structure can provide first support for the main beam in the vertical direction, and the main beam and the first support structure can generate relative motion along the length direction of the main beam; the main beam and the first supporting structure are fastened through the flexible fastening structure, wherein the flexible fastening structure can provide flexible connection between the main beam and the first supporting structure at least in the length direction of the main beam; and hoisting the tied main beam assembly to a door frame structure of the telescopic shore bridge.
In this application embodiment, consolidate the girder subassembly temporarily through flexible tying structure, can cushion the impact load who arouses by the lifting point velocity of motion desynchrony, improve the connection reliability between girder and the sea side bearing structure.
In some embodiments, the flexible tether structure includes a plurality of steel cables, each cable having two ends connected to the first support structure and the main beam, respectively, to provide a flexible connection between the main beam and the first support structure.
In this application embodiment, flexible structure of tying specifically realizes for wire rope, like this, can show the dismantlement process of simplifying interim reinforcing apparatus, for example, only need remove the rope clamp on the wire rope to take wire rope out from lug and lug, can accomplish interim reinforcing apparatus's the dismantlement process. In addition, the existing structure of the main beam assembly cannot be damaged in the dismounting process of the steel wire rope, so that operations such as paint repair and the like are not needed, and the requirement for environmental protection is favorably met.
In some embodiments, the plurality of steel cords includes a first steel cord located on a first side of the first support structure and a second steel cord located on a second side of the first support structure, wherein the first side and the second side are opposite sides of the main beam in a length direction.
In some embodiments, the frame-like first support structure comprises an upper cross beam located above the main beam, wherein: one end of the steel wire rope is connected with the lifting lugs arranged on the upper cross beam, and the other end of the steel wire rope is connected with the lifting lugs arranged on the main beam.
In some embodiments, the lifting lug on the upper beam is a process lifting lug for lifting the upper beam during the manufacturing process of the first support structure.
In some embodiments, hoisting the tied main girder assembly to the door frame structure of the telescopic shore bridge comprises: the main beam assembly is hoisted to a door frame structure of the telescopic shore bridge through a first hoisting point and a second hoisting point which are arranged on the main beam assembly, wherein the first hoisting point is positioned on the main beam, the second hoisting point is positioned on the first supporting structure, and the first hoisting point and the second hoisting point are distributed at intervals along the length direction of the main beam.
In some embodiments, the frame-like first support structure comprises an upper cross beam located above the main beam, wherein the second suspension point is located on the upper cross beam.
In some embodiments, a second support structure is mounted to the door frame structure of the telescopic shore crane, wherein the second support structure can provide a second support in the vertical direction to the main beam after the main beam assembly is hoisted to the door frame structure, and the first support and the second support are spaced apart along the length of the main beam.
In some embodiments, in the formed state of the telescopic shore crane, the first support structure is located on the sea side of the telescopic shore crane and the second support structure is located on the land side of the telescopic shore crane.
In a second aspect, embodiments of the present application provide a telescopic shore bridge, comprising a main beam assembly, which is installed by the method according to any of the embodiments of the first aspect of the present application.
Drawings
Fig. 1 shows a schematic structural diagram of a telescopic shore bridge provided in an embodiment of the present application;
FIG. 2 illustrates a schematic view of a sea-side support structure provided by embodiments of the present application;
FIG. 3 illustrates a schematic view of a land side support structure provided by an embodiment of the present application;
FIG. 4 is a schematic view illustrating an assembly of a main beam assembly according to an embodiment of the present disclosure;
fig. 5 shows a schematic view of a hoisting manner of a main beam assembly provided by the embodiment of the application;
fig. 6 shows a schematic diagram of a fastening manner of a main beam assembly provided by an embodiment of the application.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. While the description of the present application will be described in conjunction with the preferred embodiments, it is not intended to limit the features of the present invention to that embodiment. Rather, the invention has been described in connection with embodiments for the purpose of covering alternatives and modifications as may be extended based on the claims of the present application. In the following description, numerous specific details are included to provide a thorough understanding of the present application. The present application may be practiced without these particulars. Moreover, some of the specific details have been omitted from the description in order to avoid obscuring or obscuring the focus of the present application.
Fig. 1 shows an exemplary structural view of a telescopic shore bridge 1 (hereinafter referred to as "shore bridge 1"). The telescopic shore bridge 1 comprises a main beam 10 and a hoisting trolley 20 which can run back and forth along the length direction (the X direction shown in figure 1) of the main beam 10. The hoist trolley 20 can hoist the container 2 from the sea (e.g., on board the container 2 ship) to the land (e.g., on a truck) or hoist the container 2 from the land to the sea during the shuttle operation to perform the container handling function of the shore bridge 1. Herein, the side of the shore bridge 1 facing the sea is referred to as sea side, and the side facing the land (i.e., the side opposite to the sea side) is referred to as land side.
The shore bridge 1 further comprises a door frame structure 40, and the door frame structure 40 can provide support for the main beam 10 of the shore bridge 1 in the vertical direction. Specifically, the door frame structure 40 is mounted with a sea-side supporting structure 50 (as a first supporting structure) and a land-side supporting structure 60 (as a second supporting structure), and the sea-side supporting structure 50 and the land-side supporting structure 60 are spaced apart along the length direction of the main beam 10, and respectively provide a first support F1 and a second support F2 in the vertical direction to the main beam 10.
Fig. 2 is a cross-sectional view a-a of fig. 1 showing details of the sea-side support structure 50. Referring to fig. 2, sea side support structure 50 comprises a sea side upper beam 51 and a sea side suspension structure 52, wherein sea side upper beam 51 is fixed to door frame structure 40 and sea side suspension structure 52 is suspended below sea side upper beam 51. The sea side upper beam 51 is provided with a pressure wheel 53, and the sea side suspension structure 52 is provided with a supporting wheel 54.
The main beam 10 is arranged between the pressing wheels 53 and the supporting wheels 54, specifically, the upper chord of the main beam 10 is in contact with the pressing wheels 53, and the lower chord of the main beam 10 is in contact with the supporting wheels 54, so that the pressing wheels 53 and the supporting wheels 54 can provide guiding and supporting functions for the main beam 10. For example, the support wheels 54 may provide support for the main beam 10 in the vertical direction (i.e., to achieve the "first support F1" described above).
Fig. 3 is a cross-sectional view B-B of fig. 1, showing details of the land side support structure 60. Referring to fig. 3, the land side support structure 60 includes a land side upper beam 61 and a land side suspension structure 62. Unlike the sea-side support structure 50, both the land-side upper beam 61 and the land-side suspension structure 62 are fixed to the door frame structure 40. In addition, similar to the sea side suspension structure 52, the land side upper beam is mounted with pinch wheels 63 and the land side suspension structure 62 is mounted with support wheels 64.
The main beams 10 are disposed between the pressing wheels 63 and the supporting wheels 64, and are disposed in a manner similar to the sea-side supporting structure 50, which is not described in detail. It will be appreciated that the support wheels 64 may also provide support for the main beam 10 in the vertical direction (i.e., to achieve the "second support F2" described above).
Referring to fig. 2 and 3, the main beam 10 can achieve telescopic movement relative to the door frame structure 40 under the guiding action of the sea side pinch rollers 53, the supporting wheels 54, the land side pinch rollers 63 and the supporting wheels 64. Here, the telescopic movement is a movement of the main beam 10 in a length direction thereof with respect to the door frame structure 40. It will be appreciated that when the main beams 10 are extended or retracted to different positions relative to the frame structure 40, the main beams 10 have different extensions (the distance that the main beams 10 extend out of the frame structure 40) so that the shore bridge 1 can be adapted to different boat types. For example, a larger reach may match a container ship with a larger hull width.
The following exemplarily presents an installation process of the telescopic shore crane 1 provided in the embodiment of the present application, including the following steps:
s10: completing the installation of the cart travelling mechanism 30 and the door frame structure 40;
s20: mounting the land-side suspension structure 62 to the door frame structure 40;
s30: the assembly of the girder assembly is completed, wherein the girder assembly comprises the girder 10 and the sea side support structure 50. The assembling process of the main beam component comprises the following steps:
first, the sea-side support structure 50 is fitted around the outer side of the main beam 10 (as can be seen from fig. 2, the sea-side support structure 50 is a hollow frame-like structure). Fig. 4 shows the set process. Referring to fig. 4, the main beam 10 is positioned on the ground bed-jig 3 (in this case, the length direction of the main beam (X direction shown in fig. 4) extends substantially in the horizontal direction), and the sea-side support structure 50 is inserted outside the main beam 10 by the crane, thereby forming a main beam assembly 70;
the main beam assembly 70 is then reinforced by a temporary reinforcing structure. The reason for reinforcing the girder assembly 70 is: after the sea side suspension structure 52 is sleeved on the main beam 10, the relative movement of the two in the length direction (X direction shown in fig. 4) of the main beam 10 is not limited, so that the subsequent hoisting process of the main beam assembly 70 is not beneficial to the hoisting safety. Therefore, the spar assembly 70 needs to be reinforced to limit the relative movement between the spar 10 and the sea side support structure 50.
S40: and hoisting the reinforced main beam assembly 70 to the door frame structure 40 of the shore bridge 1.
Fig. 5 shows the hoisting process of the main beam assembly 70, in particular, the main beam assembly 70 is hoisted onto the door frame structure 40 by two cranes (not shown, a first crane and a second crane, respectively), wherein the first crane and the second crane are, for example, gantry cranes. Referring to fig. 5, a first suspension point 71 (the area enclosed by the dashed box) and a second suspension point 72 are provided on the main beam assembly 70. During the lifting of the main beam assembly 70, the hook 4 of the first crane acts on the first lifting point 71 and the hook 5 of the second crane acts on the second lifting point 72, so that the main beam assembly 70 is lifted onto the door frame structure 40 by the lifting action of the first and second cranes. It will be appreciated that the first and second suspension points 71 and 72 are spaced along the length of the main beam 10 (in the direction X shown in fig. 5) to ensure stability of the main beam assembly 70 during lifting. In this embodiment, the first suspension point 71 is located on the main beam 10 and the second suspension point 72 is located on the sea side upper beam (located above the main beam 10) of the sea side support structure 50.
With continued reference to fig. 5, the sea side upper beam 51 of the sea side support structure 50 is welded to the door frame structure 40 after the main beam assembly 70 is in place (i.e., after the main beam assembly 70 is hoisted by two cranes to a predetermined position on the door frame structure 40). At this time, the sea-side support structure 50 may provide a first support F1 for the main beam 10, and the land-side suspension structure 62 (already mounted to the door frame structure 40 at step S20) may provide a second support F2 for the main beam 10. After the main beam 10 is supported, the first crane and the second crane can be evacuated.
S50: the land side upper cross member 61 is welded to the door frame structure 40. After the land side upper cross member 61 is welded to the door frame structure 40, the land side press wheels 63 come into contact with the upper chords of the main beams 10.
S60: the temporary reinforcing structure on the main beam assembly 70 is removed.
In the prior art, the temporary reinforcing structure is a plurality of support rods connected between the main beam 10 and the sea-side support structure 50. Specifically, one end of the support bar is welded to the main beam 10 and the other end is welded to the sea-side support structure 50 (e.g., sea-side upper cross beam 51), so that the temporary reinforcing structure can be used to restrain the relative displacement between the main beam 10 and the sea-side support structure 50.
In the prior art, the girder assembly 70 is temporarily reinforced by the supporting rods, that is, the temporary reinforcing manner between the girder 10 and the sea-side supporting structure 50 is a rigid connection manner, which is not favorable for the reliable connection between the girder 10 and the sea-side supporting structure 50 during the hoisting process.
This is because, in the hoisting of the main beam assembly 70, the main beam assembly 70 is hoisted by at least two hoisting points (the first hoisting point 71 and the second hoisting point 72, respectively), and the moving speed between the two hoisting points (which can also be understood as the moving speed of the hooks of two cranes) cannot be strictly synchronized, for example, the moving speed of the hook of one crane is higher than that of the other crane. When the moving speeds of the lifting hooks of the two cranes are asynchronous in the horizontal direction, the temporary reinforcing device needs to bear the horizontal force caused by the asynchronous movement; when the moving speeds of the hooks of the two cranes are not synchronous in the vertical direction, the main beam 10 may incline to some extent (i.e., an included angle is formed between the length direction of the main beam 10 and the horizontal direction), and at this time, the temporary reinforcing device needs to bear the gravity component caused by the inclination of the main beam 10.
The above-described asynchronism may cause an impact load to the temporary reinforcement. In the prior art, the temporary reinforcing structure is a rigid structure like a supporting rod, failure (such as instability, cracking and the like) easily occurs under the action of impact load, and reliability of the temporary reinforcing structure is not guaranteed, so that safety of the main beam assembly 70 in the hoisting process is not facilitated.
In addition, because the temporary reinforcing structure is the supporting rod, a large amount of overhead work is required in the process of dismantling the temporary reinforcing structure. For example, it is necessary to cut the support bars, one by one, connected to the main girder 10 and the sea-side support structure 50; after the support bar 85 is cut off, the cut surface needs to be leveled, repainted and the like, and the operation difficulty is high. In addition, the re-painting of the cutting surface is not beneficial to environmental protection.
The embodiment of the application provides an installation method of a main beam assembly 70 of a telescopic shore bridge, which can solve the technical problems in the prior art. Specifically, the installation method of the main beam assembly 70 provided by the embodiment of the present application includes the following steps:
s31: the sea side support structure 50 is sleeved on the outer side of the main beam 10. The process can refer to the description in fig. 4 above, and is not described in detail.
S32: referring to fig. 6, the main beam assembly 70 is tethered (temporarily reinforced) by a flexible tethering structure 80. The flexible fastening structure 80 is capable of providing a flexible connection between the main beam 10 and the sea-side support structure 50 at least in the longitudinal direction (X direction shown in fig. 6) of the main beam 10. In this way, when the moving speeds of the first and second suspension points 71 and 72 are out of synchronization, the flexible fastening structure 80 can buffer the impact load caused by the out-of-synchronization, and reduce the risk of failure of the temporary reinforcing structure between the main beam 10 and the sea-side support structure 50, thereby improving the reliability of the connection between the main beam 10 and the sea-side support structure 50.
Referring to fig. 6, in the present embodiment, the flexible fastening structure 80 specifically includes a plurality of steel cables (including a steel cable 81 and a steel cable 82). One end of the wire rope is connected to the main beam 10 and the other end is connected to the sea side support structure 50. The steel cable has a certain elasticity, so that the steel cable can buffer external impact load, and can be used as a flexible fastening structure 80 to provide the flexible connection between the main beam 10 and the sea-side supporting structure 50. In other embodiments, other elastic connection structures (e.g., a connection rod with a bumper, etc.) may be used as the flexible fastening structure 80.
One end of each steel wire rope is connected with a lifting lug 55 arranged on the sea side upper cross beam 51 (positioned above the main beam 10), and the other end of each steel wire rope is connected with a lifting lug 13 arranged on the main beam 10. Thus, the wire ropes 81 and 82 form an included angle a with the horizontal direction, so that the wire ropes 81 and 82 can provide not only a horizontal pulling force but also a vertical pulling force to provide a flexible connection between the main beam 10 and the sea-side supporting structure 50 in multiple dimensions. In addition, the lifting lug 55 on the sea side upper beam 51 may be a process lifting lug for lifting the sea side upper beam 51 in the manufacturing process of the sea side supporting structure 50. In this way, existing lifting lugs on the sea side upper cross beam 51 can be used for realizing the steel wire rope connection between the sea side supporting structure 50 and the main beam 10, so that the process flow is saved.
The plurality of steel cords specifically include a steel cord 81 (as a first steel cord) and a steel cord 82 (as a second steel cord). As seen in fig. 6, wire line 81 is located on the left side of sea side support structure 50 and wire line 82 is located on the right side of sea side support structure 50. That is, the wire ropes 81 and 82 are respectively located on opposite sides of the sea-side support structure 50 along the length direction of the main girder 10, so that tensile force can be provided in two opposite directions to ensure reliability of the connection between the main girder 10 and the sea-side support structure 50. In some embodiments, the steel cables 81 are multiple (e.g., 2), the steel cables 81 are distributed at intervals along the width direction (the direction perpendicular to the paper surface in fig. 6) of the main beam 10, and the stress state of each steel cable pulling point can be improved by providing multiple steel cables 81. Similarly, the wire rope 82 may be provided at intervals in the width direction of the main beam 10.
In this embodiment, the flexible fastening structure 80 (as the temporary reinforcing device of the main beam assembly 70) is specifically a steel wire rope, so that the dismantling process of the temporary reinforcing device can be significantly simplified, for example, the dismantling process of the temporary reinforcing device can be completed only by removing the rope clamp on the steel wire rope and drawing out the steel wire rope from the lifting lug and the lifting lug. In addition, the existing structure of the main beam assembly 70 cannot be damaged in the dismounting process of the steel wire rope, so that operations such as paint repair and the like are not needed, and the environment-friendly requirement is favorably met.
S33: the fastened main girder assembly 70 is hoisted to the door frame structure 40 of the shore bridge 1. The process can refer to the description in step S40 above, and is not described in detail.
In summary, in the embodiment, in the hoisting process of the main beam assembly 70, the main beam assembly 70 is reinforced by using the flexible fastening structure, so that the main beam 10 can be reliably connected with the sea-side supporting structure 50. In addition, in this embodiment, the flexible fastening structure 80 is specifically implemented as a steel wire rope, which can significantly simplify the dismantling process of the flexible fastening structure 80 in the later period, and is beneficial to meeting the environmental protection requirement.
In addition, the embodiment of the present application is also used to provide a telescopic shore bridge, which includes a main beam assembly 70, and the main beam assembly 70 is installed by the installation method provided by the embodiment of the present application (for example, the method described in steps S31 to S33).
In summary, the above-described embodiments provided herein are merely illustrative of the principles and utilities of the present application and are not intended to limit the present application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.
Claims (10)
1. A method for installing a main beam assembly of a telescopic shore bridge, wherein the main beam assembly comprises a main beam of the telescopic shore bridge and a frame-shaped first support structure; the mounting method is used for mounting the main beam assembly to a door frame structure of the telescopic shore bridge;
the method for installing the main beam assembly is characterized by comprising the following steps:
sleeving the frame-shaped first support structure on the outer side of the main beam, wherein after the first support structure is sleeved on the outer side of the main beam, the first support structure can provide a first support in the vertical direction for the main beam, and the main beam and the first support structure can generate relative motion along the length direction of the main beam;
fastening the main beam and the first support structure by a flexible fastening structure, wherein the flexible fastening structure is capable of providing a flexible connection between the main beam and the first support structure at least in a length direction of the main beam;
and hoisting the fastened main beam assembly to the door frame structure of the telescopic shore bridge.
2. The method of installation according to claim 1, wherein the flexible tie down structure comprises a plurality of steel cables, each cable having two ends connected to the first support structure and the main beam, respectively, to provide the flexible connection between the main beam and the first support structure.
3. The method of installing as claimed in claim 2, wherein the plurality of wire ropes includes a first wire rope on a first side of the first support structure and a second wire rope on a second side of the first support structure, wherein the first and second sides are opposite sides of the main beam in a length direction.
4. The method of installation according to claim 2, wherein the first frame-like support structure comprises an upper cross beam located above the main beams, wherein:
one end of the steel wire rope is connected with a lifting lug arranged on the upper cross beam, and the other end of the steel wire rope is connected with the lifting lug arranged on the main beam.
5. The mounting method according to claim 4, wherein the lifting lug on the upper beam is a process lifting lug for lifting the upper beam during the manufacturing process of the first support structure.
6. The installation method of claim 1, wherein said hoisting of said fastened main girder assembly to a door frame structure of said telescopic shore bridge comprises:
the main beam assembly is hoisted to the door frame structure of the telescopic shore bridge through a first hoisting point and a second hoisting point which are arranged on the main beam assembly, wherein the first hoisting point is positioned on the main beam, the second hoisting point is positioned on the first supporting structure, and the first hoisting point and the second hoisting point are distributed along the length direction of the main beam at intervals.
7. The method of installation according to claim 6, wherein the first frame-like support structure includes an upper cross beam located above the main beams, wherein the second suspension point is located on the upper cross beam.
8. The installation method according to claim 1, wherein a second support structure is mounted on the door frame structure of the telescopic shore bridge, wherein,
the second support structure may provide a second support for the main beam in a vertical direction after the main beam assembly is hoisted to the door frame structure, and the first support and the second support are spaced apart along a length of the main beam.
9. Installation method according to claim 8, characterized in that in the formed state of the telescopic shore bridge the first support structure is located on the sea side of the telescopic shore bridge and the second support structure is located on the land side of the telescopic shore bridge.
10. A telescopic shore bridge, comprising a main beam assembly, said main beam assembly being mounted by the method of any one of claims 1 to 9.
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| CN205590172U (en) * | 2016-05-06 | 2016-09-21 | 三一海洋重工有限公司 | A bank bridge for container loading and unloading |
| CN206345605U (en) * | 2016-12-08 | 2017-07-21 | 上海振华重工(集团)股份有限公司 | Truss-like bank bridge girder and truss-like bank bridge |
| CN106946154A (en) * | 2017-05-04 | 2017-07-14 | 上海振华重工(集团)股份有限公司 | Bank bridge flexible legs |
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| CN113148835B (en) | 2022-12-23 |
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