Main girder structure of open web girder crane

Abstract

The utility model discloses a main girder structure of an open web girder crane, which relates to the technical field of cranes and is characterized in that two web plates are respectively provided with a plurality of ports which are orderly arranged at intervals along the length direction of the web plates and penetrate through the web plates, and the plurality of ports on the two web plates are arranged in one-to-one correspondence; a hollow pipe matched with the through openings is arranged between the two corresponding through openings, the two ends of the hollow pipe are both of an open structure, the two ends of the hollow pipe are correspondingly connected with the adjacent through openings respectively, openings are formed in the two ends of the box type main beam, and end plates are arranged at the two ends of the box type main beam. Supporting blocks which are inserted into the openings and are in interference fit with the openings are arranged on the sides, facing the box type main beam, of the end plates; the weight of the box-type main beam can be reduced on the premise that the structural strength of the box-type main beam is guaranteed, vortexes can be effectively prevented from being generated in the box-type main beam, and powerful support is provided for stable operation of the box-type main beam.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a main beam structure of a open-web girder crane. Background Art

[0002] A crane is a general lifting device used for lifting, transporting, loading and unloading or installing materials. It has the characteristics of simple structure, reliability and large quantity. Among them, an open-web girder crane is a lifting device specially used for container handling, usually used in places such as ports and freight stations. The main beam of an open-web girder crane usually adopts a box girder structure. This structural design aims to provide sufficient strength and stiffness to support the working load of the crane and ensure its stability and safety during operation.

[0003] Since the box main beam is the main load-bearing part of the crane, the box main beam is undoubtedly the most important working part, which results in the box main beam accounting for 60% of the total mechanical weight and the cost also accounting for more than half of the total machine cost. For this reason, the patent authorization announcement number CN202116197U, announcement date January 18, 2012, discloses an open-web main beam structure of a new type of hoist double-girder crane. It is proposed in the text that "the H-shaped steel beam installed between the left end beam 1a and the right end beam 1b, multiple through holes 7 are opened on the web 3 of the H-shaped steel beam, square steel 11 is welded on the upper wing plate 8 of the H-shaped steel beam, the through holes 7 are arranged at uniform intervals in a row, and the through holes 7 are any one of a regular hexagon, a circle and a square". Although the mass of the main beam is reduced by this main beam, there are still the following deficiencies in actual use:

[0004] 1. Although the through holes on the web can reduce the weight of the main beam, when encountering strong winds, even if the through holes on both sides of the box main beam are arranged correspondingly, the air flow is still likely to form eddy currents inside the box main beam, thereby affecting the stability of the box main beam;

[0005] 2. Due to the lack of expansion and reinforcement structures at both ends of the box main beam, the structural strength of the end part of the box main beam is insufficient, and it is impossible to ensure its reliable and firm installation after being directly connected to the crane end beam;

[0006] Therefore, there is an urgent need for a main beam structure of an open-web girder crane that can overcome the above deficiencies. Summary of the Utility Model

[0007] In order to overcome the deficiencies in the background art, the utility model discloses a main beam structure of an open-web girder crane. The utility model can not only reduce the weight of the box main beam on the premise of ensuring the structural strength of the box main beam, but also effectively avoid the generation of eddy currents inside the box main beam, providing strong support for the stable operation of the box main beam.

[0008] To achieve the above object, the utility model adopts the following technical solutions:

[0009] The main beam structure of a open-web girder crane includes an upper cover plate, a web and a lower cover plate. The upper cover plate and the lower cover plate are arranged opposite to each other up and down. A box-type main beam is formed by welding two parallel and corresponding webs between the upper cover plate and the lower cover plate. A plurality of through holes are provided on both webs, which are arranged at intervals in the length direction of the web and penetrate the web. The through holes on the two webs are arranged in one-to-one correspondence. A hollow tube that is adapted to the through hole and has open structures at both ends is provided between two corresponding through holes. The two ends of the hollow tube are respectively connected to the adjacent through holes in correspondence. The two ends of the box-type main beam form openings. End plates are provided at both ends of the box-type main beam. A support block that is inserted into the opening and has an interference fit with the opening is provided on the side of the end plate facing the box-type main beam.

[0010] Further, the length of the hollow tube is greater than the distance between two corresponding through holes, and snap rings are provided on the outer edges of the two end ports of the hollow tube.

[0011] Further, the wall thickness of the hollow tube is less than the thickness of the web.

[0012] Further, the plurality of through holes on the web surface are arranged in a matrix, and two adjacent through holes up and down are arranged staggeredly.

[0013] Further, a plurality of reinforcing ribs are provided on the web surface, which are arranged at intervals in the length direction of the web and are arranged staggeredly with the through holes.

[0014] Further, a plurality of screw rods are evenly distributed on the end faces at both ends of the upper cover plate and the lower cover plate in the length direction of the web. A plurality of through holes corresponding to the plurality of screw rods on the end faces of the upper cover plate and the lower cover plate are provided on the end plate surface. The end of the screw rod passes through the through hole, and a nut is provided at its end.

[0015] Further, a sinking groove is provided at one end of the through hole far from the web, and the end of the screw rod is located in the sinking groove.

[0016] Further, a plurality of mounting openings for connecting the end beam of the lifting equipment are evenly distributed on the outer edge of the end plate surface.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: By providing through holes, the weight of the web can be effectively reduced, thereby reducing the overall weight of the box-type main beam;

[0018] By providing hollow tubes, not only can the through holes be effectively reinforced and supported, but also the airflow can be guided and discharged through the through holes and the hollow tubes in strong wind weather, avoiding the generation of eddy currents inside the box-type main beam in strong wind weather and affecting the stability of the box-type main beam;

[0019] By providing reinforcing ribs, the rigidity of the web can be enhanced, and the structural strength of the box-type main beam can be further improved.

[0020] By setting the end plate and the support block, not only can the end of the box girder be expanded and supported, further improving the structural strength of the end of the box girder, but also it provides convenience for the subsequent installation of the box girder.

[0021] The utility model can not only reduce the weight of the box girder on the premise of ensuring the structural strength of the box girder, but also effectively avoid the generation of eddy currents inside the box girder, providing strong support for the stable operation of the box girder; the structure of the utility model is simple, convenient for installation and use, providing strong support for the use and installation of the box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural view of the utility model;

[0023] Figure 2 is a side sectional view of the utility model;

[0024] Figure 3 is a schematic view of the installation of the end plate of the utility model;

[0025] Figure 4 is Figure 3 an enlarged view of part a of

[0026] In the figure: 1, upper cover plate; 2, end plate; 3, through hole; 4, web; 5, stiffening rib; 6, lower cover plate; 7, retaining ring; 8, hollow tube; 9, support block; 10, open end; 11, installation opening; 12, sinking groove; 13, nut; 14, through hole; 15, screw rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will describe the technical solutions of the present utility model in conjunction with the drawings in the embodiments of the present utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, they are only corresponding to the drawings of the present utility model for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0028] Please refer to the attached drawings of the specification Figures 1-4 , the present utility model provides a technical solution:

[0029] Example 1. The main beam structure of a belly beam crane includes an upper cover plate 1, a web 4, and a lower cover plate 6. The upper cover plate 1 and the lower cover plate 6 are arranged opposite to each other up and down. A box-shaped main beam is formed by welding two parallel and corresponding webs 4 between the upper cover plate 1 and the lower cover plate 6. A plurality of openings 3 are provided on both webs 4, which are arranged at intervals in the length direction of the web 4 and penetrate the web 4. The plurality of openings 3 on the two webs 4 are arranged in one-to-one correspondence. A hollow tube 8 that is adapted to the opening 3 and has an open structure at both ends is provided between two corresponding openings 3. In order to achieve the firm and stable installation of the hollow tube 8, the length of the hollow tube 8 is greater than the distance between two corresponding openings 3. The two ends of the hollow tube 8 respectively penetrate through the adjacent openings 3, and a retaining ring 7 is welded on the outer edge of the two ends of the hollow tube 8. In order to further reduce the weight of the web 4, the wall thickness of the hollow tube 8 is less than the thickness of the web 4.

[0030] Openings 10 are formed at both ends of the box-shaped main beam. End plates 2 are provided at both ends of the box-shaped main beam. A support block 9 that is inserted into the opening 10 and has an interference fit with the opening 10 is provided on the side of the end plate 2 facing the box-shaped main beam. By using the interference fit between the support block 9 and the opening 10, the structural stability of the end of the box-shaped main beam can be effectively enhanced. In order to achieve the installation of the end plate 2, a plurality of screws 15 arranged in the length direction of the web 4 are evenly distributed on the end faces of the two ends of the upper cover plate 1 and the lower cover plate 6. A plurality of through holes 14 corresponding to the plurality of screws 15 on the end faces of the upper cover plate 1 and the lower cover plate 6 are provided on the end plate 2. The end of the screw 15 passes through the through hole 14, and a nut 13 is provided at its end. In order to prevent the end of the screw 15 and the nut 13 from affecting the installation of the box-shaped main beam in the future, a sinking groove 12 is provided at the end of the through hole 14 far from the web 4. The end of the screw 15 is located in the sinking groove 12, and the size of the sinking groove 12 is larger than that of the nut 13, so as to facilitate the installation of the nut 13 in the future. A plurality of installation openings 11 for connecting with the end beam of the lifting equipment are evenly distributed on the outer edge of the end plate 2.

[0031] Example 2. In order to effectively ensure the rigid strength of the web 4, the plurality of openings 3 on the web 4 are arranged in a matrix. The two adjacent openings 3 up and down are staggered. The opening 3 is preferably a circular structure. The circular structure of the opening 3 distributes stress evenly and has no sharp angles, so the influence on the strength of the plate is small. A plurality of stiffening ribs 5 are provided on the web 4, which are arranged at intervals in the length direction of the web 4 and are staggered with the opening 3.

[0032] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A main beam structure of a hollow beam crane, comprising an upper cover plate (1), a web plate (4) and a lower cover plate (6), wherein the upper cover plate (1) and the lower cover plate (6) are arranged opposite to each other in upper and lower directions, and the upper cover plate (1) and the lower cover plate (6) are welded by two parallel and corresponding web plates (4) to form a box-type main beam, characterized in that: The two webs (4) are each provided with a plurality of openings (3) which are arranged in an orderly manner along the length direction of the webs (4) and penetrate the webs (4). The plurality of openings (3) on the two webs (4) are arranged in a one-to-one correspondence. A hollow tube (8) which is matched with the opening (3) and has an open structure at both ends is provided between two corresponding openings (3). The two ends of the hollow tube (8) are respectively connected to the adjacent openings (3). Openings (10) are formed at both ends of the box-type main beam. End plates (2) are each provided at both ends of the box-type main beam. A support block (9) which is inserted into the opening (10) and has an interference fit with the opening (10) is provided on the side of the end plate (2) facing the box-type main beam.

2. The main beam structure of a hollow beam crane according to claim 1, characterized in that: The length of the hollow tube (8) is greater than the distance between the two corresponding through openings (3), and retaining rings (7) are provided on the outer edges of the two end ports of the hollow tube (8).

3. The main beam structure of a hollow beam crane according to claim 1, characterized in that: The wall thickness of the hollow tube (8) is smaller than the thickness of the web (4).

4. The main beam structure of a hollow beam crane according to claim 1, characterized in that: The plurality of through openings (3) on the plate surface of the web (4) are arranged in a matrix, and two through openings (3) adjacent to each other are arranged in a staggered manner.

5. The main beam structure of a hollow beam crane according to claim 4, characterized in that: The surface of the web (4) is provided with a plurality of reinforcing ribs (5) which are orderly arranged at intervals along the length direction of the web (4) and are staggered with the through openings (3).

6. The main beam structure of a hollow beam crane according to claim 1, characterized in that: A plurality of screw rods (15) are evenly distributed on the end surfaces of both ends of the upper cover plate (1) and the lower cover plate (6) and are arranged along the length direction of the web plate (4). A plurality of through holes (14) corresponding to the plurality of screw rods (15) on the end surfaces of the upper cover plate (1) and the lower cover plate (6) are arranged on the surface of the end plate (2). The ends of the screw rods (15) pass through the through holes (14) and are provided with nuts (13) at their ends.

7. The main beam structure of a hollow beam crane according to claim 6, characterized in that: A sinking groove (12) is provided at one end of the through hole (14) away from the web (4), and an end of the screw rod (15) is located in the sinking groove (12).

8. The main beam structure of a hollow beam crane according to claim 7, characterized in that: A plurality of mounting openings (11) for connecting to the end beam of the lifting equipment are evenly distributed on the outer edge of the plate surface of the end plate (2).

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