CN106946154A - Bank bridge flexible legs - Google Patents

Abstract

The invention provides a flexible column of a quay bridge, which adopts a door frame diagonal bracing structure. The flexible column of a quay bridge includes a front girder, a rear girder, a door frame structure and a trapezoidal frame of a flexible column on the land side, wherein the flexible column on the land side The door frame structure is arranged between the front girder and the rear girder, the ladder frame is arranged on the door frame structure of the land-side flexible column, and double rows of tie rods are hinged between the ladder frame and the front girder. The flexible column of the shore bridge of the present invention not only releases the bending moment of the door frame column, avoids the phenomenon of "gnawing the rail" of the cart wheel, reduces the load of the traveling mechanism of the cart running in the direction of the sea and land side, but also can greatly improve the operation of the shore bridge trolley. Directional stiffness, self-seismic frequency, and seismic capacity, while greatly reducing the cross-sectional height and plate thickness of the connecting beam, have a positive effect on structural weight reduction.

Description

Quay crane flexible column

technical field

The invention relates to port loading and unloading equipment, in particular to a flexible column of a quay bridge, which adopts a door frame diagonal bracing structure.

Background technique

The quay crane is the main equipment in the container loading and unloading process, and it plays a very important role in the container loading and unloading process.

After my country's accession to the World Trade Organization, import and export trade has continued to increase, and the throughput of containers has reached new heights every year. The competition in the international container shipping market is fierce, and large-scale ships are an effective way for shipping companies to reduce operating costs in order to survive. In 2011, the world's shipping giant Maersk Line announced an order for 10 ultra-long, ultra-wide, and ultra-high (Triple E) 18,000-TEU container ships in the world. However, the capacity of the existing quay cranes on the wharf is limited and cannot meet the loading and unloading requirements for Triple E ships. Its main reason is: the forward reach of front girder is not long enough, the lifting height on the rail is not high enough, and the speed of lifting and trolley is not fast enough. If the loading and unloading tasks cannot be completed in a short time to meet the requirements of ships leaving the port quickly, this will affect the efficiency of terminal operations and reduce the actual income of the terminal.

In order to adapt to the inevitable trend of increasingly large-scale container ships, it is necessary to increase the size of the equipment for loading and unloading it - the quay bridge, that is, to develop in the direction of "three super-types" with ultra-long outreach, ultra-large lifting height and ultra-high operating speed.

The new generation of quay crane has a lifting height of more than 50 meters and an outreach of more than 70 meters, with heavy lifting load and high operating speed. The increase in the weight of the quay crane has resulted in an increase in its own weight, but the carrying capacity of the wharf that has been put into use is limited, so the self-weight of the new generation of quay crane must be kept at the same level as that of the conventional quay crane. It is a brand-new issue faced by the traditional quayside crane design technology. In addition to overcoming the difficulty in operation and low work efficiency caused by the super-large lifting height and super-large outreach distance, it is also necessary to consider how to solve the self-weight control brought by the large-scale quayside crane (to meet the requirements of the wharf. Existing bearing capacity), structural stiffness, structural fatigue, earthquake resistance and a series of issues.

The unloading process of the quay crane is mainly to lift the container by the trolley on the quay bridge, and the lifting trolley lifts the container from one end of the quay bridge to the top of the truck at the other end of the quay bridge along the track, and then places the container on the container. On the card, after the container is placed, the lifting trolley returns to the ship above the seaside container of the quay crane, and the next container is hoisted, and the loading process of the quay crane is the reverse operation.

Therefore, the main working direction of the quay crane is the running direction of the trolley, the stiffness and frequency of the running direction of the trolley are particularly important, and the door frame is an important part of supporting the upper structure of the whole quay bridge, so this field needs to design a new type of quay bridge door frame structure, so that The lightweight design of the quay crane is carried out while ensuring the structural rigidity of the quay crane trolley in the running direction.

Contents of the invention

The technical problem to be solved by the present invention is to provide a flexible column of the quayside bridge in order to overcome the relatively difficult self-weight control of large-scale quayside bridges in the prior art, and relatively complicated defects such as structural rigidity, structural fatigue and earthquake resistance.

The present invention solves the above technical problems through the following technical solutions:

A flexible column of a quay bridge, which adopts a door frame diagonal bracing structure, is characterized in that the flexible column of the quay bridge includes a front girder, a rear girder, a door frame structure and a trapezoidal frame of the flexible column on the land side, wherein the flexible column on the land side The door frame structure is arranged between the front girder and the rear girder, the ladder frame is arranged on the door frame structure of the land-side flexible column, and double rows of tie rods are hinged between the ladder frame and the front girder.

Preferably, the door frame structure of the land-side flexible column includes a land-side column, a land-side upper beam, a land-side lower beam, a connecting beam, a sea-side column, a sea-side upper beam, and a sea-side lower beam;

The land side column, the connecting beam and the sea side column are connected to each other to form a frame structure;

The landside upper beam is arranged at the upper end of the landside column, and the landside lower beam is arranged at the lower end of the landside column;

The sea-side upper beam is arranged at the upper end of the sea-side column, and the sea-side lower beam is arranged at the lower end of the sea-side column.

Preferably, the door frame structure of the land-side flexible column further includes a horizontal brace and a door frame diagonal brace, and the horizontal brace is horizontally connected between the land-side column and the sea-side column;

The left upper end of the door frame diagonal brace is connected with the land side column and the horizontal brace, and the right lower end of the door frame diagonal brace is connected with the connecting beam.

Preferably, the extension line of the centerline of the upper left end of the door frame diagonal brace and the extension line of the centerline of the left end of the horizontal brace meet at the center section of the landside column.

Preferably, the door frame structure of the flexible column on the land side further includes a rear strut of the ladder frame and a column of the ladder frame, one end of the column of the ladder frame is connected to the upper part of the upper beam on the sea side, and the other end is connected to the ladder frame, so that One end of the rear strut of the ladder frame is connected to the upper beam on the land side, and the other end of the rear strut of the ladder frame is connected to the ladder frame.

Preferably, the connection between the upper left end of the diagonal brace of the door frame and the upright on the land side is designed as a cross-shaped gusset plate, and the gusset plate is inserted into the pipe of the diagonal brace of the door frame.

Preferably, the connection between the lower right end of the diagonal brace of the door frame and the connecting beam is designed as a cross-shaped gusset plate, and the gusset plate is inserted into the pipe of the diagonal brace of the door frame.

Preferably, the extension line of the center line of the lower right end of the diagonal brace of the door frame converges at the center of the sea side cart track.

Preferably, the diagonal struts of the door frame, the horizontal struts and the sea-side uprights form a stable triangular structure.

Preferably, the land side column, the land side upper beam, the land side lower beam, the connecting beam, the sea side column, the sea side upper beam and the sea side lower beam are box beam structure;

The diagonal struts of the door frame, the horizontal struts, the rear struts of the ladder frame and the upright columns of the ladder frame are all of circular pipe structure.

The positive progress effect of the present invention is:

The flexible column of the shore bridge of the present invention not only releases the bending moment of the door frame column, avoids the phenomenon of "gnawing the rail" of the cart wheel, reduces the load of the traveling mechanism of the cart running in the direction of the sea and land side, but also can greatly improve the operation of the shore bridge trolley. Directional stiffness, self-seismic frequency, and seismic capacity, while greatly reducing the cross-sectional height and plate thickness of the connecting beam, have a positive effect on structural weight reduction.

Description of drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals represent the same features throughout, wherein:

Fig. 1 is a schematic structural view of the flexible column of the quay crane of the present invention.

Fig. 2 is a front view of the door frame diagonal bracing structure of the flexible connection of the landside column in the flexible column of the quay crane according to the present invention.

Fig. 3 is a side view of the door frame diagonal bracing structure of the flexible connection of the landside column in the flexible column of the quayside bridge according to the present invention.

Fig. 4 shows that the extension line of the center line of the diagonal strut of the door frame in the flexible column of the quay bridge of the present invention converges at the center of the cart track on the sea side.

Fig. 5 is a front view of the hinge shaft of the land-side flexible column in the flexible column of the quay crane of the present invention.

Fig. 6 is a side view of the hinge shaft of the land-side flexible column in the flexible column of the quay crane of the present invention.

Fig. 7 is a schematic diagram of the cross-shaped gusset plate at the upper left end of the diagonal brace of the door frame in the flexible column of the quay bridge according to the present invention.

Fig. 8 is a sectional view taken along line K-K in Fig. 7 .

Fig. 9 is a schematic diagram of the cross-shaped gusset plate at the lower right end of the diagonal brace of the door frame in the flexible column of the quay bridge according to the present invention.

Fig. 10 is a sectional view taken along line W-W in Fig. 9 .

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same numbers will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the description of the present invention may be selected by the applicant according to his or her judgment, and the detailed meanings thereof are set forth herein described in the relevant section of the description. Furthermore, it is required that the present invention be understood not only by the actual terms used, but also by the meaning implied by each term.

Fig. 1 is a schematic structural view of the flexible column of the quay crane of the present invention. Fig. 2 is a front view of the door frame diagonal bracing structure of the flexible connection of the landside column in the flexible column of the quay crane according to the present invention. Fig. 3 is a side view of the door frame diagonal bracing structure of the flexible connection of the landside column in the flexible column of the quayside bridge according to the present invention. Fig. 4 shows that the extension line of the center line of the diagonal strut of the door frame in the flexible column of the quay bridge of the present invention converges at the center of the cart track on the sea side. Fig. 5 is a front view of the hinge shaft of the land-side flexible column in the flexible column of the quay crane of the present invention. Fig. 6 is a side view of the hinge shaft of the land-side flexible column in the flexible column of the quay crane of the present invention. Fig. 7 is a schematic diagram of the cross-shaped gusset plate at the upper left end of the diagonal brace of the door frame in the flexible column of the quay bridge according to the present invention. Fig. 8 is a sectional view taken along line K-K in Fig. 7 . Fig. 9 is a schematic diagram of the cross-shaped gusset plate at the lower right end of the diagonal brace of the door frame in the flexible column of the quay bridge according to the present invention. Fig. 10 is a sectional view taken along line W-W in Fig. 9 .

As shown in Figures 1 to 10, the present invention discloses a flexible column of a quay bridge, which adopts a door frame diagonal bracing structure, which includes a front girder 10, a rear girder 20, a door frame structure 30 of a land side flexible column and a trapezoidal frame 40, Wherein the door frame structure 30 of the land side flexible column is arranged between the front girder 10 and the rear girder 20, the ladder frame is arranged on the door frame structure 30 of the land side flexible column, and a double row of pull rods is hinged between the ladder frame 40 and the front girder 10 50.

Preferably, the door frame structure 30 of the land-side flexible column includes a land-side column 31, a land-side upper beam 32, a land-side lower beam 33, a connecting beam 34, a sea-side column 35, a sea-side upper beam 36, and a sea-side lower beam 37; The land side column 31, the connecting beam 34 and the sea side column 35 are connected to each other to form a frame structure. The sea side upper beam 32 is arranged on the upper end of the sea side column 35 , and the sea side lower beam 37 is arranged on the lower end of the sea side column 35 .

Further, the door frame structure 30 of the land-side flexible column further includes a horizontal strut 38 and a door frame diagonal strut 39 to horizontally connect the horizontal strut 38 between the land-side column 31 and the sea-side column 35 . The upper left end of the door frame diagonal strut 39 is connected with the land side column 31 and the horizontal strut 38 , and the right lower end of the door frame diagonal strut 39 is connected with the connecting beam 34 .

In particular, the extension line of the centerline of the upper left end of the door frame diagonal strut 39 and the extension line of the centerline of the left end of the horizontal strut 38 converge on the central section of the landside column 31 .

Furthermore, the door frame structure 30 of the land side flexible column also includes a ladder frame rear strut 60 and a ladder frame column 61, one end of the ladder frame column 61 is connected to the upper part of the sea side upper beam 36, and the other end is connected to the ladder frame 40 , one end of the rear strut 60 of the ladder frame is connected with the upper beam 32 on the land side, and the other end of the rear strut 60 of the ladder frame is connected with the ladder frame 40 .

Here, the connection between the upper left end of the door frame diagonal brace 39 and the land side column 31 is designed as a cross-shaped gusset plate 80 , and the gusset plate 80 is inserted into the pipe inside of the door frame diagonal brace 39 . Similarly, the connection between the lower right end of the door frame diagonal brace 39 and the connecting beam 34 is designed as a cross-shaped gusset plate, the gusset plate 80 is inserted into the pipe of the door frame diagonal brace, and the extension of the center line of the right lower end of the door frame diagonal brace The lines meet at the center of the cart track on the sea side.

The extension line of the center line of the diagonal struts of the door frame meet at the center of the 70 track of the sea side cart, and the diagonal struts of the door frame, the horizontal struts, and the sea side columns form a stable three-point support structure, and there is no need to increase the section and thickness of the door frame columns When the height of the upper and lower beams on the sea and land sides is high, the stiffness, self-vibration frequency and seismic capacity of the trolley running direction during the loading and unloading operations of the quay bridge can be guaranteed, and the section height and plate thickness of the connecting beams are greatly reduced, which plays a role in the steel structure. weight loss.

The extended line of the center line of the lower right end of the door frame diagonal brace 39 converges at the center of the seaside cart 70 tracks. The diagonal struts 39 of the door frame, the horizontal struts 38 and the uprights 35 on the sea side form a stable triangular structure, without increasing the cross-section of the door frame uprights, the plate thickness, and the height of the upper and lower beams on the sea and land sides, it is possible to ensure The stiffness, self-seismic frequency and seismic capacity of the trolley running direction, while greatly reducing the cross-sectional height and plate thickness of the connecting beam, play a role in reducing the weight of the steel structure. In the geometric figure, the triangular structure is simple and has high stability. Therefore, the diagonal braced structure of the door frame of the flexible column improves the stiffness and natural frequency of the traveling direction of the quay crane trolley.

At the same time, the design of the cross-shaped gusset plate inserted into the diagonal brace of the door frame improves the embedding capacity of both ends of the diagonal brace of the door frame, effectively reduces the slenderness ratio of the diagonal brace of the door frame, and prevents the brace from being unstable under pressure. The two ends of the diagonal brace 39 of the door frame adopt the design of cross-shaped gusset plate, and its pipe diameter can be reduced from 1.3 meters to 1.2 meters.

According to the above structure, in order to release the bending moment of the door frame column for the super-large large-gauge quay bridge, avoid the phenomenon of "gnawing the rail" between the wheels of the cart and the track, and at the same time, in order to reduce the deflection running load of the traveling mechanism of the cart in the direction of sea and land, the The connection between the land side column 31 and the connecting beam 34 is designed as a flexible hinge connection, that is, a hinge connection (as shown in FIG. 5 ). The degree of freedom of rotation of this connection is in a released state, that is, the land-side column 31 can rotate relative to the connecting beam 34 at the hinge axis 311 to release the bending moment of the door frame column, avoid the phenomenon of "rail-gnawing" of the cart wheel, and reduce the The deflection running load of the running gear in the sea and land side direction.

However, after the land side column is designed to be flexibly connected, the stiffness and natural frequency of the quay crane in the direction of trolley running will decrease. In order to improve the stiffness and natural vibration frequency of the quay bridge in the running direction of the trolley, the land side column 31, the land side upper beam 32, the land side lower beam 33, the connecting beam 34, the sea side column 35, the sea side upper beam 36 and the sea side lower beam The beams 37 are box beam structures. Door frame diagonal strut 39, horizontal strut 38, ladder frame rear strut 60 and trapezoid frame column 61 are all circular pipe fitting structures.

In summary, the door frame diagonal braced structure of the flexible column of the quay bridge according to the present invention can meet the rigidity, self-seismic frequency and seismic capacity requirements of the flexible column door frame diagonally braced structure of the quay bridge with a trolley gauge greater than 35 meters. The connection between the landside column and the connecting beam is designed as a flexible hinge connection, and the degree of freedom of rotation of this connection is in a released state, that is, the landside column and the connecting beam can rotate relative to each other at the hinge axis 311 . The extension line of the center line of the upper left end of the diagonal brace of the door frame and the extension line of the center line of the left end of the horizontal brace converge on the center section of the column on the land side, and the connection between the upper left end of the diagonal brace of the door frame and the column is designed as a cross-shaped gusset plate, the node The plates are inserted inside the strut tubes. The lower right end of the diagonal brace of the door frame is inclined to the sea side column, and is connected with the sea side end of the connecting beam. Converge at the center of the cart track on the sea side. Therefore, the diagonal struts of the door frame, the horizontal struts, and the seaside columns form a stable triangular structure. Therefore, the diagonally braced structure of the door frame of this kind of flexible column improves the stiffness and natural vibration frequency of the quay crane trolley in the running direction. At the same time, the design of the cross-shaped gusset plate inserted into the diagonal brace of the door frame improves the embedding capacity of both ends of the diagonal brace of the door frame, effectively reduces the slenderness ratio of the diagonal brace of the door frame, and prevents the brace from being unstable under pressure.

The diagonally braced structure of the door frame of the flexible column of the quay bridge according to the present invention can meet the requirements of the diagonally braced structure of the door frame of the flexible column of the quay bridge with a gauge greater than 35 meters. The door frame structure is lighter in weight and lower in production cost. It avoids the "gnawing rail" phenomenon of the cart wheels, reduces the load of the traveling mechanism of the cart running in the direction of sea and land, and can greatly improve the stiffness, self-vibration frequency, and anti-seismic capacity of the quay crane trolley in the running direction, and at the same time greatly reduce In order to connect the cross-sectional height and plate thickness of the beam, it has a positive effect on reducing the weight of the structure.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (10)

1. A flexible column of a quay bridge adopts a door frame diagonal bracing structure, characterized in that the flexible column of a quay bridge includes a door frame structure and a trapezoidal frame of a front girder, a rear girder, a land side flexible column, wherein the land side flexible column The door frame structure of the column is arranged between the front girder and the rear girder, and the ladder frame is arranged on the door frame structure of the flexible column on the land side, and a double row is hinged between the ladder frame and the front girder. tie rod. 2. The flexible column of the shore bridge according to claim 1, wherein the door frame structure of the flexible column on the land side comprises a column on the land side, an upper beam on the land side, a lower beam on the land side, a connecting beam, a column on the sea side, a sea side column Side upper beam and sea side lower beam; The land side column, the connecting beam and the sea side column are connected to each other to form a frame structure; The landside upper beam is arranged at the upper end of the landside column, and the landside lower beam is arranged at the lower end of the landside column; The sea-side upper beam is arranged at the upper end of the sea-side column, and the sea-side lower beam is arranged at the lower end of the sea-side column. 3. The flexible column of the shore bridge according to claim 2, wherein the door frame structure of the flexible column on the land side also includes a horizontal strut and a diagonal strut of the door frame, and the horizontal strut is connected horizontally on the land side between the uprights and said seaside uprights; The left upper end of the door frame diagonal brace is connected with the land side column and the horizontal brace, and the right lower end of the door frame diagonal brace is connected with the connecting beam. 4. The flexible column of the quay bridge according to claim 3, wherein the extension line of the left upper center line of the diagonal brace of the door frame and the extension line of the left end center line of the horizontal brace converge at the On the center section of the landside upright. 5. The flexible column of the shore bridge as claimed in claim 3, wherein the door frame structure of the flexible column on the land side also includes a ladder frame rear strut and a ladder frame column, and one end of the ladder frame column is connected to the sea side. The upper part of the upper beam is connected, and the other end is connected to the ladder frame, one end of the rear strut of the ladder frame is connected to the land side upper beam, and the other end of the rear strut of the ladder frame is connected to the ladder frame. 6. The flexible column of the shore bridge according to claim 3, wherein the connection between the upper left end of the door frame diagonal brace and the land side column is designed as a cross-shaped gusset plate, and the gusset plate is inserted into the door frame Inside the tube of the diagonal brace. 7. The flexible column of the quay bridge according to claim 3, characterized in that, the connection between the lower right end of the door frame diagonal brace and the connecting beam is designed as a cross-shaped gusset plate, and the gusset plate is inserted into the door frame obliquely. Inside the tube of the strut. 8. The flexible column of the shore bridge according to claim 3, wherein the extension line of the center line of the lower right end of the diagonal brace of the door frame converges at the center of the sea side cart track. 9. The flexible column of the shore bridge according to any one of claims 3-7, characterized in that, the diagonal braces of the door frame, the horizontal braces and the seaside columns form a stable triangular structure. 10. The flexible column of the quay bridge according to claim 9, characterized in that, the landside column, the landside upper beam, the landside lower beam, the connecting beam, the seaside column, the Both the sea-side upper beam and the sea-side lower beam are box girder structures; The diagonal struts of the door frame, the horizontal struts, the rear struts of the ladder frame and the upright columns of the ladder frame are all of circular pipe structure.