High strength lightweight composite railway bridge walkway plank

Abstract

The utility model belongs to railway bridge accessory facility technical field discloses a kind of high-strength light composite material railway bridge walking plate, the walking plate includes the planar portion of top and the strip-shaped protrusion of hollow inside, it is arranged along length direction, strip-shaped recess is formed to the downward opening between protrusion, to improve bearing capacity and reduce dead weight, by setting hollow inside strip-shaped protrusion as reinforcing rib structure, material is distributed in bearing area, so that walking plate realizes light weight under the premise of guaranteeing overall rigidity and strength, convenient transportation and installation.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway bridge ancillary facilities, and more specifically, it relates to a high-strength lightweight composite material railway bridge pedestrian slab. Background Technology

[0002] Railway bridges are an important part of railway lines. Pedestrian walkways on bridges are key ancillary facilities that ensure the safety of maintenance workers during daily operations and facilitate the passage of pedestrians. Especially in the field of heavy-haul railways, due to the heavy axle load, high transport volume, and high operating density of trains, more stringent requirements are placed on the durability, structural stability, and safety and reliability of the line's ancillary facilities.

[0003] Currently, common cement pedestrian slabs have defects such as heavy weight, cracking, weathering and corrosion; while rubber pedestrian slabs are prone to aging, have large deflection, poor wind resistance, and insufficient installation stability.

[0004] With the increase in railway line loads and the improvement of engineering standards, pedestrian walkways need to have the following properties: higher load-bearing capacity and impact resistance, lighter weight to reduce construction difficulty, good weather resistance and corrosion resistance, and reliable fixing structure to prevent displacement or detachment under strong winds.

[0005] Traditional cement boards or rubber boards cannot achieve the above-mentioned performance, so there is an urgent need for a new type of pedestrian board that is structurally sound, lightweight and high-strength, and has diverse installation methods. Utility Model Content

[0006] This invention provides a high-strength, lightweight composite material railway bridge pedestrian slab to overcome the aforementioned defects in the prior art.

[0007] The purpose and effect of this utility model of a high-strength lightweight composite material railway bridge pedestrian slab are achieved by the following specific technical means: A high-strength, lightweight composite material railway bridge pedestrian slab, the pedestrian slab being an integrally molded sheet material, comprising: a top planar portion; strip-shaped protrusions extending downward from the bottom surface of the planar portion, the strip-shaped protrusions being distributed parallel to each other along the length direction of the planar portion, and each strip-shaped protrusion having a hollow internal structure; and downwardly opening strip-shaped grooves formed between adjacent strip-shaped protrusions, the strip-shaped protrusions and the strip-shaped grooves together constituting a frame-like reinforcing structure at the bottom of the pedestrian slab.

[0008] In a further technical solution, the opening of the strip-shaped groove is provided with an extension portion extending along the inner side of the groove.

[0009] In a further technical solution, the walking board is integrally formed from glass fiber reinforced resin matrix composite material through a pultrusion process.

[0010] In a further technical solution, the hollow structure extends along the entire length of the strip-shaped protrusion.

[0011] In a further technical solution, the walking board also includes an S-shaped connector for fixing the walking board to the mounting steel beam. The S-shaped connector is formed by bending a sheet material and includes a top plate, a middle plate, and a bottom plate from top to bottom. The top plate and the middle plate are connected by a long side plate to form a first slot for engaging the walking board. The middle plate and the bottom plate are connected by a short side plate to form a second slot for engaging the mounting steel beam.

[0012] In a further technical solution, the top plate and / or the long side plate are provided with through holes for installing fasteners.

[0013] A further technical solution involves installing a connecting rod within the hollow structure of the walkway slab. The connecting rod extends into the hollow structure and is fixed to the walkway slab with fastening bolts, thereby enhancing the overall stability of the walkway slab during large-span installation.

[0014] In a further technical solution, the walking board also includes a hook-type connector, the top of which forms a T-shaped portion, and the T-shaped portion is provided with a longitudinal locking hole for engaging with a pre-set mounting hole on the walking board to achieve a fast connection. The lower side of the hook-type connector forms a hook portion for hanging and installing steel beams.

[0015] A further technical solution is that the upper surface of the hook portion has multiple anti-slip teeth to increase the friction with the beam support.

[0016] A further technical solution is to form an open groove on the lower side of the hook-type connector to reduce the weight of the connector.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting hollow strip-shaped protrusions inside as reinforcing ribs, the material is distributed to the parts that can best perform the load-bearing function. This "hollow rib plate" structure greatly reduces its own weight while ensuring overall rigidity and strength. Its weight is only about one-seventh of that of traditional concrete slabs, which greatly facilitates transportation and installation.

[0018] 2. The bottom of the pedestrian slab of this utility model has an open strip groove, and the connector is placed in the strip groove. On the one hand, it can hide the connector itself, saving volume, and on the other hand, the pedestrian slab itself can protect the connector, effectively preventing external dirt from entering the inner cavity and causing corrosion to the connector. In addition, by setting two types of connectors, the connectors can stably and firmly fix the pedestrian slab to the installation steel beam. In actual use, the pedestrian slab can be installed on the steel beam in sequence as needed, so that the pedestrian slab remains stable on the installation steel beam, fundamentally solving the safety hazard of the pedestrian slab being easily blown over by the wind. The pedestrian slab of this utility model can be repeatedly laid to meet the setting requirements of the pedestrian area of ​​the bridge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the walking board in this utility model; Figure 2 This is a schematic diagram of the structure of the bottom of the walking board in this utility model; Figure 3 This is a side view of the walking board in this utility model; Figure 4 This is a schematic diagram of the overall structure of the first embodiment of the connector in this utility model; Figure 5 This is a side view of the first embodiment of the connector in this utility model; Figure 6 This is a schematic diagram of a second embodiment of the connector in this utility model; Figure 7 This is a schematic diagram of the bottom structure of the connector in the second embodiment of this utility model; Figure 8 This is a schematic diagram showing the connection state of the first embodiment of the connector in this utility model with the walking board.

[0020] Figure 9 This is a schematic diagram showing the connection state of the second embodiment of the connector in this utility model with the walking board.

[0021] It should be noted that the accompanying drawings are for illustrative purposes only and do not constitute a limitation.

[0022] Explanation of reference numerals in the attached figures: 10. Flat part, 11. Strip-shaped protrusion, 12. Hollow structure, 13. Strip-shaped groove, 14. Extension, 15. Top plate, 16. Middle plate, 17. Bottom plate, 18. Long side plate, 19. First bayonet, 20. Short side plate, 21. Second bayonet, 22. Through hole, 23. Longitudinal locking hole, 24. Hook-type connector, 25. Open groove, 26. T-shaped part, 27. Hook part, 28. Anti-slip teeth, 29. Beam support, 30. Connecting rod, 31. S-shaped connector, 32. Transverse bolt, 33. Longitudinal bolt, 34. Fastening bolt. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1: This example provides a high-strength, lightweight composite material railway bridge pedestrian slab body, see attached document. Figure 1-3 The walking board body is a one-piece molded board, including: a top flat portion 10, with strip-shaped protrusions 11 extending downward from the bottom surface of the flat portion 10, the strip-shaped protrusions 11 being distributed parallel to each other along the length direction of the flat portion 10, and each strip-shaped protrusion 11 having a hollow structure 12 inside; and a downwardly opening strip-shaped groove 13 being formed between adjacent strip-shaped protrusions 11, the strip-shaped protrusions 11 and the strip-shaped grooves 13 together constituting a frame-shaped reinforcing structure at the bottom of the walking board.

[0027] Preferably, 6-10 parallel hollow protrusions are used, each strip protrusion 11 extends along the entire length, and the strip groove 13 opens downward, forming a lightweight and high-rigidity frame structure.

[0028] Preferably, the opening of the strip groove 13 is provided with an extension 14 extending along the inner side of the groove to increase the contact area between the bottom of the walking board body and the mounting steel beam.

[0029] Preferably, the walking board is integrally formed from glass fiber reinforced resin matrix composite material through a pultrusion process.

[0030] In this embodiment, the pedestrian slab can be made of glass fiber reinforced resin matrix composite material, which has the characteristics of light weight, high strength, and excellent corrosion resistance. The pedestrian slab is preferably integrally formed by pultrusion molding to obtain a hollow structure with a consistent cross-section and continuous internal cavity.

[0031] Preferably, the hollow structure 12 extends along the entire length of the strip-shaped protrusion 11.

[0032] Example 2, as Figure 4 , Figure 5 As shown, this embodiment provides an S-shaped connector 31 for fixing a walking board to a mounting steel beam. The S-shaped connector 31 is formed by bending a sheet metal and includes a top plate 15, a middle plate 16, and a bottom plate 17 from top to bottom. The top plate 15 and the middle plate 16 are connected by a long side plate 18 to form a first latch 19 for securing the walking board. The middle plate 16 and the bottom plate 17 are connected by a short side plate 20 to form a second latch 21 for securing the mounting steel beam.

[0033] In this embodiment, as Figure 8 As shown, multiple spaced and parallel installation steel beams are located on the lower side. The installation steel beams are beam supports 29, and the cross-section of the beam support 29 is T-shaped. Two S-shaped connectors 31 are symmetrically placed, and the two long side plates 18 are close to each other, with the second latch 21 engaging with the suspension plate of the beam support 29. The two S-shaped components can be connected to each other by transverse bolts 32. When installing the walkway, it is installed from top to bottom onto the S-shaped connectors 31. The top plate 15 enters the strip groove 13 and fits against its top inner wall, and is fixed by longitudinal bolts.

[0034] In practical applications, multiple pedestrian slabs can be installed on S-shaped connectors at different locations as needed to meet the paving requirements of pedestrian areas on bridges. For example, two pedestrian slabs can be installed from top to bottom onto two S-shaped connectors 31 to form a longer slab surface; or multiple pedestrian slabs can be placed side by side on beam supports 29 to increase the width of the slab surface.

[0035] Preferably, the top plate 15 and / or the long side plate 18 are provided with through holes 22 for installing fasteners.

[0036] In this embodiment, the long side plate 18 has through holes 22, and the left and right S-shaped connectors are symmetrically arranged so that the left and right long side plates 18 are close to each other and the through holes 22 are aligned. Bolts are used to pass through the two through holes 22 laterally and to fasten the two S-shaped connectors laterally.

[0037] In this embodiment, the top plate 15 has a through hole 22, and the walking plate is installed on the S-shaped connector 31 from top to bottom so that the top plate 15 enters the strip groove 13. The walking plate has a pre-set mounting slot. Bolts are used to pass longitudinally through the mounting slot of the walking plate and connect to the through hole 22 on the top plate to achieve the function of fastening the S-shaped connector 31 to the walking plate.

[0038] Preferably, a connecting rod 30 is provided inside the hollow structure 12 of the walking board. The connecting rod 30 extends into the hollow structure 12 and is fixed to the walking board by fastening bolts 34, thereby enhancing the overall stability of the walking board when it is installed over a large span.

[0039] Example 3, as Figure 6 , Figure 7 As shown, this embodiment provides a hook-type connector 24 for fastening a walkway board to an installation steel beam. The top of the hook-type connector 24 forms a T-shaped portion 26, and the T-shaped portion 26 is provided with a longitudinal locking hole 23 for engaging with a pre-set installation hole on the walkway board to achieve a fastening connection. The lower side of the hook-type connector 24 forms a hook portion 27 for hanging the installation steel beam.

[0040] Preferably, the upper surface of the hook portion 27 has a plurality of anti-slip teeth 28 to increase the friction with the beam support.

[0041] Preferably, the lower side of the hook-type connector 24 forms an open groove 25 to reduce the weight of the connector.

[0042] In this embodiment, as Figure 9 As shown, the top of the hook-type connector 24 extends into the strip groove 13 at the bottom of the walking board, and bolts are used to pass through the longitudinal slots and longitudinal locking holes on the T-shaped part of the walking board to lock the walking board to the T-shaped part 26. The bottom hook part 27 of the hook-type connector 24 hooks upward to the bottom of the suspension plate of the beam support 29, and the anti-slip teeth 28 are in close contact with the beam support 29 to increase friction and reduce the risk of disengagement.

[0043] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A high-strength, lightweight composite material railway bridge pedestrian slab, characterized in that, The walking board is a one-piece molded board material, comprising: The top flat portion (10); Strip-shaped protrusions are formed by extending downward from the bottom surface of the planar portion (10). The strip-shaped protrusions (11) are distributed parallel to each other along the length direction of the planar portion (10), and each strip-shaped protrusion (11) has a hollow structure (12) inside. A downward-opening groove (13) is formed between adjacent strip-shaped protrusions (11), and the strip-shaped protrusions (11) and the groove (13) together constitute the frame-like reinforcing structure at the bottom of the walking board.

2. The high-strength lightweight composite material railway bridge pedestrian slab according to claim 1, characterized in that, The opening of the strip groove (13) is provided with an extension (14) extending along the inner side of the groove.

3. The high-strength lightweight composite material railway bridge pedestrian slab according to claim 1, characterized in that, The walking board is integrally formed from glass fiber reinforced resin matrix composite material through a pultrusion process.

4. The high-strength lightweight composite material railway bridge pedestrian slab according to claim 1, characterized in that, The hollow structure (12) extends along the entire length of the strip-shaped protrusion (11).

5. A high-strength, lightweight composite material railway bridge pedestrian slab according to any one of claims 1-4, characterized in that, The walking board also includes an S-shaped connector (31) for fixing the walking board to the mounting steel beam. The S-shaped connector (31) is formed by bending a plate and includes a top plate (15), a middle plate (16) and a bottom plate (17) from top to bottom. The top plate (15) and the middle plate (16) are connected by a long side plate (18) to form a first latch (19) for snapping the walking board. The middle plate (16) and the bottom plate (17) are connected by a short side plate (20) to form a second latch (21) for snapping the installation steel beam.

6. A high-strength, lightweight composite material railway bridge pedestrian slab according to claim 5, characterized in that, The top plate (15) and / or the long side plate (18) are provided with through holes (22) for installing fasteners.

7. A high-strength, lightweight composite material railway bridge pedestrian slab according to claim 5, characterized in that, A connecting rod (30) is provided inside the hollow structure (12) of the walking board. The connecting rod (30) extends into the hollow structure (12) and is fixed to the walking board by fastening bolts (34), thereby enhancing the overall stability of the walking board when it is installed over a large span.

8. A high-strength, lightweight composite material railway bridge pedestrian slab according to any one of claims 1-4, characterized in that, The walking board also includes a hook-type connector (24), the top of which forms a T-shaped part (26), and the T-shaped part (26) is provided with a longitudinal locking hole (23) for cooperating with a pre-set mounting hole on the walking board to achieve a fast connection. The lower side of the hook-type connector (24) forms a hook part (27) for hanging and installing steel beams.

9. A high-strength, lightweight composite material railway bridge pedestrian slab according to claim 8, characterized in that, The upper surface of the hook portion (27) has multiple anti-slip teeth (28) to increase the friction with the beam support.

10. A high-strength, lightweight composite material railway bridge pedestrian slab according to claim 8 or 9, characterized in that, An open groove (25) is formed on the lower side of the hook-type connector (24) to reduce the weight of the connector.

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