A suspended monorail open box-shaped track beam

Abstract

The present invention relates to the technical field of bridge engineering, and provides a suspended monorail open box-shaped track beam, which includes two bottom plates, and each of the bottom plates has a portion for the running wheels to contact. The first closed box-shaped member and the second closed box-shaped member are respectively erected on the two bottom plates, and a third closed box-shaped member is provided between the ends of the first closed box-shaped member and the second closed box-shaped member that are far away from the bottom plates. The first closed box-shaped member and the second closed box-shaped member both have portions for the guide wheels to contact. The first closed box-shaped member, the second closed box-shaped member, and the third closed box-shaped member form a closed-loop structure. The track beam composed of three closed box-shaped members in the present invention, and the three form a closed-loop structure, so that the stress flow also forms a complete closed-loop. Compared with the open section, the torsional strength of the cross-section of this structure is greatly improved, about more than ten times that of the open section, significantly reducing the deformation caused by torsion, and providing guarantee for improving the riding comfort of the train.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and particularly to a suspended monorail open box-shaped track beam. Background Art

[0002] The traditional suspended monorail track beam adopts an open box-shaped cross-section. The beam cross-section is surrounded by a top plate, webs, and a bottom plate. Among them, the bottom plate includes left and right parts, which serve as the running surface of the suspended monorail train. The train bogie is connected to the train car body through the gap of the bottom plate. As Figure 1 shown. In the figure, a is the top plate, b is the web, and c is the bottom plate. In this traditional form, the torsional stiffness of the open cross-section is relatively low. For curved-section bridges, the track beam is made into a curved beam for curved sections. In small-radius curves, under the action of vertical loads (such as train live loads), the track beam is subjected to a large torque, thus generating a large deformation. This part of the deformation is equivalent to or even greater than the vertical deformation, which has a great impact on the comfort and smoothness of the train during driving. Since the suspended monorail has great advantages in tourism and sightseeing projects, travel comfort is particularly important in this system. Summary of the Invention

[0003] The purpose of the present invention is to provide a suspended monorail open box-shaped track beam, which can at least solve some defects in the prior art.

[0004] To achieve the above purpose, the embodiments of the present invention provide the following technical solutions: A suspended monorail open box-shaped track beam includes two bottom plates, and each of the bottom plates has a part for the running wheels to contact. It also includes a first closed box-shaped part and a second closed box-shaped part respectively erected on the two bottom plates. A third closed box-shaped part is provided between the ends of the first closed box-shaped part and the second closed box-shaped part that are far from the bottom plates. Both the first closed box-shaped part and the second closed box-shaped part have parts for the guide wheels to contact; the first closed box-shaped part, the second closed box-shaped part, and the third closed box-shaped part form a closed-loop structure.

[0005] Furthermore, it also includes an upper top plate, two inner webs, and two outer webs. One inner web and one outer web are erected on each bottom plate. The upper top plate covers the two inner webs and the two outer webs. The first closed box-shaped part is surrounded by the upper top plate, one of the bottom plates, and the inner web and the outer web erected on this bottom plate. The second closed box-shaped part is surrounded by the upper top plate, the other bottom plate, and the inner web and the outer web erected on this bottom plate.

[0006] Furthermore, it also includes a lower top plate arranged below the upper top plate. The upper top plate, the lower top plate, and the two inner webs enclose to form the third closed box-shaped part.

[0007] Further, the upper top plate, the lower top plate, the inner web and the outer web are all steel plates with a thickness between 12 mm and 28 mm.

[0008] Further, the first closed box type, the second closed box type and the third closed box type are all provided with first transverse stiffeners.

[0009] Further, the first closed box type, the second closed box type and the third closed box type are all provided with opening grooves for the first transverse stiffeners to be inserted into their interiors.

[0010] Further, the first transverse stiffener protrudes 25 - 50 mm outside the opening groove.

[0011] Further, longitudinal stiffeners are provided below each bottom plate.

[0012] Further, second transverse stiffeners are provided below each bottom plate.

[0013] Further, the first closed box type and the second closed box type also both have parts for the stabilizing wheels to contact, and the parts for the stabilizing wheels to contact are located above the parts for the guiding wheels to contact.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The track beam composed of three closed box types forms a closed-loop structure, so that the stress flow also forms a complete closed loop. Compared with the open section, the torsional strength of the cross-section of this structure is greatly improved, about more than ten times that of the open section, significantly reducing the deformation caused by torsion and providing guarantee for improving the riding comfort of the train.

[0016] 2. In the traditional open section, transverse stiffeners are arranged on the outer sides of the longitudinal plate members of the track beam, and the height of the stiffeners is 150 mm - 250 mm, which has a greater impact on the shape of the track beam and the landscape effect is poor. While in this track beam, most of the transverse stiffeners are located inside the outer web and the upper top plate, and only about 30 mm protrudes at the grooved part, having very little impact on the appearance continuity of the track beam and significantly improving the landscape effect.

[0017] 3. In the traditional open section, 20 mm - 30 mm steel plates are used for the top plate and the web, and the welding operation difficulty is relatively large. While in this track beam, the upper and lower top plates and the inner and outer webs all use 12 mm - 28 mm thick steel plates, which can effectively control the steel consumption of the structure. At the same time, the smaller fillet weld height can significantly reduce the welding operation difficulty, reduce the residual stress and welding deformation, and is beneficial to the alignment control of the track beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a traditional suspended monorail track beam;

[0019] Figure 2 Schematic diagram of a suspended monorail open box-shaped track beam provided by an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of a suspended monorail open box-shaped track beam with three contact positions provided by an embodiment of the present invention;

[0021] In the attached drawings: 1 - First closed box; 2 - Second closed box; 3 - Third closed box; 40 - Upper top plate; 41 - Inner web; 42 - Outer web; 43 - Lower top plate; 44 - First transverse stiffener; 45 - Open slot; 46 - Longitudinal stiffener; 47 - Second transverse stiffener; 48 - Bottom plate; 50 - Part contacted by the running wheel; 51 - Part contacted by the guide wheel; 52 - Part contacted by the stabilizer wheel. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figure 1 and Figure 2 , an embodiment of the present invention provides a suspended monorail open box-shaped track beam, including two bottom plates 48, each of the bottom plates 48 having a part 50 for the running wheel to contact, and further including a first closed box 1 and a second closed box 2 respectively erected on the two bottom plates 48. A third closed box 3 is provided between the ends of the first closed box 1 and the second closed box 2 away from the bottom plate 48. Both the first closed box 1 and the second closed box 2 have a part 51 for the guide wheel to contact; the first closed box 1, the second closed box 2, and the third closed box 3 form a closed-loop structure. In this embodiment, the track beam composed of three closed boxes and the three form a closed-loop structure, so that the stress flow also forms a complete closed loop. Compared with the open section, the torsional strength of this structure is greatly improved, about more than ten times that of the open section, significantly reducing the deformation caused by torsion and providing a guarantee for improving the riding comfort of the train. Specifically, the existing thin plate is improved to a closed box with a chamber, and the three closed boxes form a closed-loop structure, which makes the stress flow also form a complete closed loop, thereby greatly improving the torsional strength, about more than ten times that of the open section, significantly reducing the deformation caused by torsion, and solving a series of defects brought by the traditional method.

[0024] As an optimized solution of the embodiment of the present invention, please refer to Figure 1and Figure 2 In addition, the track beam further includes an upper top plate 40, two inner webs 41 and two outer webs 42. One inner web 41 and one outer web 42 are vertically provided on each bottom plate 48. The upper top plate 40 covers the two inner webs 41 and the two outer webs 42. The first closed box 1 is formed by enclosing the upper top plate 40, one of the bottom plates 48, and the inner web 41 and the outer web 42 vertically provided on this bottom plate 48. The second closed box 2 is formed by enclosing the upper top plate 40, the other bottom plate 48, and the inner web 41 and the outer web 42 vertically provided on this bottom plate 48. In the embodiment, specifically, the above-mentioned first closed box 1 is formed by enclosing the upper top plate 40, one of the bottom plates 48, and the inner web 41 and the outer web 42 vertically provided on this bottom plate 48. The second closed box 2 is formed by enclosing the upper top plate 40, the other bottom plate 48, and the inner web 41 and the outer web 42 vertically provided on this bottom plate 48. There is a certain interval between the adjacent inner web 41 and outer web 42, so that a box chamber is formed therein.

[0025] To further optimize the above solution, please refer to Figure 1 and Figure 2 In addition, the track beam further includes a lower top plate 43 provided below the upper top plate 40. The upper top plate 40, the lower top plate 43 and the two inner webs 41 enclose to form the third closed box 3. In this embodiment, the third closed box 3 is formed by enclosing the upper top plate 40, the lower top plate 43 and the two inner webs 41. The upper top plate 40 and the lower top plate 43 are preferably arranged in parallel, and there is also a certain interval between them, so that a box chamber is formed after enclosure. In this way, the three closed boxes can form a closed-loop structure. Preferably, the upper top plate 40, the lower top plate 43, the inner webs 41, the outer webs 42, the bottom plates 48, and the longitudinal stiffeners 46 are continuous along the axis direction of the track beam and are the main load-bearing members of the structure. The transverse stiffeners composed of the second transverse stiffeners 47 and the two first transverse stiffeners 44 are welded to the outside of the lower top plate 43, the inner webs 41, and the bottom plates 48 and are arranged at equal intervals along the longitudinal direction of the track beam, which further improves the torsional stiffness of the cross-section and at the same time reduces the local deformation of the plate members.

[0026] To further optimize the above solution, the upper top plate 40, the lower top plate 43, the inner webs 41 and the outer webs 42 are all steel plates with a thickness between 12 mm and 28 mm. In this embodiment, in the traditional open cross-section, the top plate and the web are both made of steel plates with a thickness of 20 mm to 30 mm, and the welding operation is relatively difficult. However, the upper and lower top plates 43 and the inner and outer webs 42 of this track beam are all made of steel plates with a thickness of 12 mm to 28 mm, which can effectively control the steel consumption of the structure. At the same time, the smaller fillet height can significantly reduce the welding operation difficulty, reduce the participation stress and welding deformation, and is beneficial to the alignment control of the track beam.

[0027] As an optimized solution of the embodiment of the present invention, please refer to Figure 1 and Figure 2 , the first closed box 1, the second closed box 2, and the third closed box 3 are all provided with first transverse stiffeners 44. In this embodiment, adding transverse stiffeners can improve the strength of the structure and thus enhance the stability of the structure.

[0028] For further optimization of the above solution, please refer to Figure 1 and Figure 2 , the first closed box 1, the second closed box 2, and the third closed box 3 are all provided with opening grooves 45 for the first transverse stiffeners 44 to be inserted into their interiors. Preferably, the first transverse stiffeners 44 protrude 25 - 50 mm outside the opening grooves 45. In this embodiment, by providing the opening grooves 45 on the first closed box 1, the second closed box 2, and the third closed box 3, the first transverse stiffeners 44 can enter the closed boxes from the opening grooves 45. In the traditional open cross-section, transverse stiffeners are arranged on the outer side of the longitudinal plate of the track beam, and the height of the stiffeners is 150 mm - 250 mm, which has a greater impact on the shape of the track beam and the landscape effect is poor. While for this track beam, most of the transverse stiffeners are located inside the outer web 42 and the upper top plate 40, and only about 30 mm protrudes at the grooved part, which has very little impact on the appearance continuity of the track beam and significantly improves the landscape effect. Preferably, when the first transverse stiffeners 44 enter the box chamber, the outer surfaces of the outer web 42 and the upper top plate 40 are connected to the first transverse stiffeners 44 by welding to improve the local support effect and the structural integrity.

[0029] As an optimized solution of the embodiment of the present invention, please refer to Figure 1 and Figure 2 , longitudinal stiffeners 46 are provided below each bottom plate 48. Second transverse stiffeners 47 are provided below each bottom plate 48. In this embodiment, the functions of providing the longitudinal stiffeners 46 and the second transverse stiffeners 47 are the same as those of the above-mentioned first transverse stiffeners 44, and will not be elaborated here. Preferably, in order to ensure the alignment of the track beam, reduce the construction difficulty and the welding deformation of the structure, the weld length between the transverse stiffeners and the longitudinal plates can be appropriately reduced.

[0030] As an optimized solution of the embodiment of the present invention, please refer to Figure 1 and Figure 2, the first closed box-shaped member 1 and the second closed box-shaped member 2 also each have a portion 52 for the stabilizing wheel to contact, and this portion 52 for the stabilizing wheel to contact is located above the portion 51 for the guiding wheel to contact. In this embodiment, the portion for the traveling wheel to contact is provided on the bottom plate 48, and the portion 51 for the guiding wheel to contact is provided on the first closed box-shaped member 1 and the second closed box-shaped member 2. Specifically, it is provided on their inner webs 41. The portion 52 for the stabilizing wheel to contact is also provided on the inner web 41, but its position is higher than the portion 51 for the guiding wheel to contact.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A suspended monorail open box-shaped track beam, comprising two bottom plates, and each of the bottom plates has a portion for the running wheels to contact, characterized in that: It further includes a first closed box section and a second closed box section respectively erected on the two base plates. A third closed box section is provided between the ends of the first closed box section and the second closed box section away from the base plates. Both the first closed box section and the second closed box section have parts for the guide wheels to contact. The first closed box section, the second closed box section and the third closed box section form a closed-loop structure. The first closed box section, the second closed box section and the third closed box section are all provided with first transverse stiffeners. The first closed box section, the second closed box section and the third closed box section are all provided with opening grooves for the first transverse stiffeners to be inserted into their interiors. The first transverse stiffeners protrude 25 - 50 mm outside the opening grooves. A longitudinal stiffener is provided under each base plate.

2. The suspended monorail open box-shaped track beam according to claim 1, wherein: It further includes an upper top plate, two inner webs and two outer webs. One inner web and one outer web are erected on each base plate. The upper top plate covers the two inner webs and the two outer webs. The first closed box section is enclosed by the upper top plate, one of the base plates and the inner web and the outer web erected on this base plate. The second closed box section is enclosed by the upper top plate, the other base plate and the inner web and the outer web erected on this base plate.

3. The suspended monorail open box-shaped track beam according to claim 2, wherein: It further includes a lower top plate provided under the upper top plate. The upper top plate, the lower top plate and the two inner webs enclose to form the third closed box section.

4. The suspended monorail open box-shaped track beam according to claim 3, wherein: The upper top plate, the lower top plate, the inner webs and the outer webs are all steel plates with a thickness between 12 mm and 28 mm.

5. The suspended monorail open box-shaped track beam according to claim 1, characterized in that: A second transverse stiffener is provided under each base plate.

6. The suspended monorail open box-shaped track beam according to claim 1, characterized in that: The first closed box section and the second closed box section also both have parts for the stabilizer wheels to contact, and the parts for the stabilizer wheels to contact are located above the parts for the guide wheels to contact.

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