A telescopic connection assembly on a bridge steel anti-collision guardrail

Abstract

The present invention discloses a telescopic connection assembly on a steel anti-collision guardrail of a bridge, comprising beams on both sides of an expansion joint, a connecting sleeve, a rolling assembly and anchor bolts, wherein the beams comprise a fixed beam and a movable beam, one end of the connecting sleeve is fixed in the fixed beam by an anchor bolt, and the other end of the connecting sleeve extends into the movable beam; the rolling assembly is fixedly mounted at the end of the connecting sleeve and can roll in the movable beam. The present invention changes conventional contact sliding into rolling movement, greatly reduces component friction during use, improves component durability, avoids the use of oblong holes in structure, and the telescopic connection assembly has no open holes, thereby avoiding the risk of connection assembly failure caused by foreign body intrusion; it has good three-way displacement function, strong anti-collision capability, good durability, neat and beautiful appearance, and can be widely used in large-span and long-jointed bridge structures.

Description

Technical Field

[0001] The invention relates to the field of bridge guardrails, and in particular to a telescopic connection component on a steel anti-collision guardrail of a bridge. Background Art

[0002] As the concept of green bridges has gained popularity, people have higher and higher requirements for the landscape of bridge structures. Ordinary concrete guardrails have poor landscape effects, while steel anti-collision guardrails have greatly improved in shape and permeability. Therefore, steel anti-collision guardrails are widely used in steel structure bridges, large-span special structure bridges, bridges with special landscape requirements, and bridges in areas with severe snow accumulation. Bridges usually need to be equipped with telescopic devices in the longitudinal direction to adapt to the deformation of the bridge structure under the action of temperature, automobiles and other live loads; to ensure driving safety, steel anti-collision guardrails are generally longitudinal continuous structures, so they also need to be equipped with longitudinal telescopic devices like bridge structures. On the other hand, with the rapid development of bridge construction technology, long span and super-long bridge structures are becoming more and more widely used, and the demand for telescopic capacity at the ends of bridge structure beams has increased significantly.

[0003] Conventional steel anti-collision guardrail expansion and contraction devices use oblong holes opened on steel beams, connected by connecting sleeves and bolts. When the bridge structure is longitudinally expanded and deformed, the bolts move in the oblong holes to achieve the expansion and contraction of the steel anti-collision guardrail. The above-mentioned steel anti-collision guardrail expansion and contraction devices are well adapted to small expansion and contraction situations, but for large-span long-jointed bridge structures, the expansion and contraction of the bridge structure under load can reach 20-100cm. The length of the oblong holes of conventional expansion and contraction devices is too long, and the bolt stroke is too large. During the expansion and contraction process, the bolts and the steel structure contact and slide, resulting in serious friction losses. The durability of the structure is poor after the anti-corrosion layer is worn. In addition, the sliding friction between the bolts and the steel structure will produce noise, which violates the concept of environmental protection; the long oblong holes are easily invaded by foreign objects and easily cause the bolts to become stuck and fail; the oblong holes with large expansion and contraction significantly weaken the strength of the beam structure; conventional steel anti-collision guardrail expansion and contraction devices are mainly adapted to the longitudinal deformation of bridges, while the expansion and contraction of large-span long-jointed bridges usually have three-way (longitudinal, transverse, rotational) displacement characteristics, and conventional steel anti-collision guardrail expansion and contraction devices are difficult to meet the large expansion and contraction requirements of bridge structures. It is particularly important to develop a telescopic connection assembly for a bridge steel anti-collision guardrail with a large telescopic amount. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a telescopic connection component on a bridge steel anti-collision guardrail, which has the advantages of high strength and low noise and is particularly suitable for bridge steel guardrails with large telescopic requirements.

[0005] In order to solve the above technical problems, the technical solution proposed in the present invention is: a telescopic connection assembly on a steel anti-collision guardrail of a bridge, comprising beams on both sides of the expansion joint, connecting sleeves, rolling assemblies and anchor bolts, the beams comprising a fixed beam and a movable beam, one end of the connecting sleeve is fixed in the fixed beam by an anchor bolt, and the other end of the connecting sleeve extends into the movable beam; the rolling assembly is fixedly installed at the end of the connecting sleeve and can roll in the movable beam.

[0006] As a further improvement of the above technical solution: the fixed beam and the movable beam have the same outer dimensions and are located on the same axis, with consistent appearance and uniform and reasonable force; the ends of the fixed beam and the movable beam are aligned with the beam end lines of the bridge, and the guardrail does not affect the expansion and contraction of the bridge structure, or in other words, the expansion and contraction of the bridge structure does not affect the safety of the guardrail.

[0007] Furthermore, the rolling assembly includes one or more coaxial vertical rollers, one or more coaxial horizontal rollers and cylindrical bearings used in conjunction with the vertical rollers and horizontal rollers. The cylindrical bearings pass through the vertical rollers, horizontal rollers and connecting sleeves respectively and are welded and fixed to the connecting sleeves, thereby being able to adapt to the relative three-way displacement of the guardrails on both sides.

[0008] Furthermore, the vertical roller and the horizontal roller both include a steel roller and a nylon layer wrapped around it. The inner diameter of the steel roller is the same as the diameter of the cylindrical bearing. The nylon layer reduces noise, and the same diameter ensures smooth installation.

[0009] Furthermore, the diameter of the vertical roller is smaller than the vertical length of the inner circle of the moving beam by a certain dimension a, and the diameter of the horizontal roller is smaller than the lateral length of the inner circle of the moving beam by a certain dimension b; the values ​​of a and b increase with the increase of the span and the length of the bridge structure, but are not greater than the difference between the inner circle length of the moving beam and the outer circle length of the connecting sleeve in their respective directions, where the length of the bridge refers to the length of a bridge, that is, the length of the bridge between two expansion joints (no expansion joint is provided in the middle of a bridge), and a and b can adapt to the relative vertical and horizontal displacement of the guardrails on both sides.

[0010] Furthermore, the longitudinal spacing between the vertical roller and the horizontal roller is d, wherein 10 cm ≤ d ≤ 50 cm. If it is too short, it will be difficult to install, while if it is too long, it will waste the casing material.

[0011] Furthermore, the horizontal center axis of the cylindrical bearing of the vertical roller is located below the horizontal center axis of the connecting sleeve, and the lower end of the vertical roller contacts the moving beam, ensuring that under normal working conditions, the vertical roller contacts the moving beam to avoid collision.

[0012] Furthermore, a rectangular roller hole along the height direction of the rolling assembly and a circular bearing hole perpendicular to the height direction of the rolling assembly are provided on the moving side of the connecting sleeve, which facilitates the installation of the bearing and the roller.

[0013] Furthermore, the gap between the rectangular roller hole and the left and right ends of the rolling assembly is c1, and the gap between the rectangular roller hole and the upper and lower sides of the rolling assembly is c2, wherein the adjustment range of c1 is 0.1cm≤c1≤5cm, and the adjustment range of c2 is 0.1cm≤c2≤5cm, to prevent the roller from being damaged by friction with the steel casing.

[0014] Furthermore, the sides of the rectangular roller hole are all ground structures to prevent the roller from being damaged by friction between the roller and the steel casing.

[0015] The working principle of the present invention is:

[0016] When the bridge structure deforms under the action of temperature and other loads, the steel anti-collision guardrail deforms along with the bridge structure. The deformation of the beam end of a long-span and long-connected bridge structure is often a combination of deformation in the longitudinal, transverse and rotational directions, requiring the steel anti-collision guardrail telescopic connection assembly to have three-way deformation adaptability. One end of the connecting sleeve of the present invention is fixed to the side of the fixed beam, and the other end extends into the movable beam. The connecting sleeve contacts the movable beam through vertical and horizontal rollers, and leaves a certain gap with the inner cavity of the movable beam. The connecting sleeve can freely expand and contract longitudinally in the inner cavity of the movable beam through the roller to realize longitudinal deformation; horizontal movement space is provided through the gap b between the horizontal roller and the inner cavity of the movable beam, and the gap between the connecting sleeve and the movable beam in the horizontal direction can provide angular freedom with the horizontal roller as the axis; when the bridge is subjected to load, there is a relative vertical angular displacement at the beam end, and the gap a between the vertical roller and the inner cavity of the movable beam provides vertical movement space, and the gap between the connecting sleeve and the movable beam in the vertical direction can provide angular freedom with the vertical roller as the axis; in summary, this component can realize three-way displacement of the steel anti-collision guardrail in the longitudinal, horizontal and vertical directions.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The telescopic connection assembly of the bridge steel anti-collision guardrail of the present invention can adapt to the telescopic characteristics of large-span and long-jointed bridges, realizes the three-way displacement function of the telescopic connection assembly of the steel anti-collision guardrail in the longitudinal, transverse and rotational directions, and has broad application prospects;

[0019] 2. The telescopic connection assembly of the bridge steel anti-collision guardrail of the present invention realizes the telescopic function of the bridge steel anti-collision guardrail by rolling the vertical and horizontal rollers installed on the connecting sleeve, changing the conventional contact sliding into rolling movement, greatly reducing the friction of the assembly during use, and improving the durability of the assembly. In addition, a nylon layer is provided on the outer ring of the roller to avoid the generation of noise during the telescopic operation of the assembly;

[0020] 3. The telescopic connection assembly of the bridge steel anti-collision guardrail of the present invention avoids the use of oblong holes in its structure, and the telescopic connection assembly has no open holes, thereby avoiding the risk of failure of the connection assembly due to the intrusion of foreign objects; the collision beam is a complete square steel pipe component, has no weak strength intervals, and has strong anti-collision capabilities; the appearance of the steel beam is neat and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 Middle AA section enlarged view;

[0023] Figure 3 It is an elevational view of the connection sleeve and the rolling assembly in the present invention;

[0024] Figure 4 It is a plan view of the connection sleeve and the rolling assembly in the present invention;

[0025] Figure 5 yes Figure 3 Enlarged cross-section of the middle BB;

[0026] Figure 6 yes Figure 3 Enlarged cross-sectional view of the middle CC;

[0027] Figure 7 is a schematic diagram of the structure of the vertical roller and / or the horizontal roller in the present invention;

[0028] Figure 8 yes Figure 7 Middle DD section view.

[0029] Legend:

[0030] 1. Crossbeam; 11. Fixed crossbeam; 12. Moving crossbeam; 2. Connecting sleeve; 21. Rectangular roller hole; 22. Circular bearing hole; 3. Rolling assembly; 31. Vertical roller; 32. Horizontal roller; 4. Anchor bolts; 5. Cylindrical bearing; 6. Steel roller; 7. Nylon layer. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0032] like Figures 1 to 8 As shown, the telescopic connection assembly on the bridge steel anti-collision guardrail of this embodiment includes an expansion joint ( Figure 1The crossbeam 1, connecting sleeve 2, rolling assembly 3 and anchor bolt 4 on both sides of the crossbeam 11, N1 is the center line of the expansion joint, the crossbeam 1 includes a fixed crossbeam 11 and a movable crossbeam 12, one end of the connecting sleeve 2 is fixed in the fixed crossbeam 11 by the anchor bolt 4, and a rubber pad is provided between the anchor bolt 4 and the connecting sleeve, which can effectively prevent the anchor bolt from loosening, and the other end of the connecting sleeve 2 extends into the movable crossbeam 12; the rolling assembly 3 is fixedly installed at the end of the connecting sleeve 2 and can roll in the movable crossbeam 12; the guardrail telescopic connection assembly of this embodiment changes the conventional contact sliding into rolling movement, which greatly reduces the friction of the assembly during use and improves the durability of the assembly. The structure avoids the use of oblong holes, and the telescopic connection assembly has no open holes, which avoids the risk of failure of the connection assembly caused by foreign matter intrusion; the impact beam is a complete square steel pipe component, there is no weak strength interval, and the anti-collision ability is strong; the appearance of the steel beam is neat and beautiful.

[0033] In this embodiment, the fixed beam 11 and the movable beam 12 have the same outer dimensions and are located on the same axis N4; the ends of the fixed beam 11 and the movable beam 12 are aligned with the beam end line N2 of the bridge, and the fixed beam 11 and the movable beam 12 are both square tube structures.

[0034] In this embodiment, the rolling assembly 3 includes one or more coaxial vertical rollers 31, one or more coaxial horizontal rollers 32 and cylindrical bearings 5 ​​used in conjunction with the above-mentioned vertical rollers 31 and horizontal rollers 32. The cylindrical bearings 5 ​​pass through the vertical rollers 31, the horizontal rollers 32 and the connecting sleeve 2 respectively and are then welded and fixed to the connecting sleeve 2.

[0035] In this embodiment, the vertical roller 31 and the horizontal roller 32 both include a steel roller 6 and a nylon layer 7 wrapped around it. The nylon layer 7 is provided on the outer ring of the steel roller 6 to avoid the generation of noise during the extension and retraction operation of the rolling assembly 3. The inner diameter of the steel roller 6 is the same as the diameter of the cylindrical bearing 5.

[0036] In this embodiment, the diameter of the vertical roller 31 is smaller than the vertical length of the inner ring of the moving beam 12 by a certain dimension a, and the diameter of the horizontal roller 32 is smaller than the transverse length of the inner ring of the moving beam 12 by a certain dimension b, so as to adapt to the three-dimensional (longitudinal, transverse, and rotational) deformation of the bridge structure; the values ​​of a and b increase with the increase of the span and the length of the bridge structure, but are not greater than the difference between the inner ring length of the moving beam 12 and the outer ring length of the connecting sleeve 2 in their respective directions; the longitudinal spacing between the vertical roller 31 and the horizontal roller 32 is d, where 10cm≤d≤50cm. Reasonable selection of parameters such as a, b, and d can enable the bridge steel anti-collision guardrail telescopic connection assembly of this embodiment to adapt to the telescopic characteristics of large-span and long-span bridges, realize the three-directional displacement function of the steel anti-collision guardrail telescopic connection assembly in the longitudinal, transverse and rotational directions, and have broad application prospects.

[0037] In this embodiment, the cylindrical bearing 5 of the vertical roller 31 is installed at a certain distance toward the lower middle part of the connecting sleeve 2, that is, the horizontal center axis N3 of the cylindrical bearing 5 of the vertical roller 31 is located below the horizontal center axis N4 of the connecting sleeve 2, and the lower end of the vertical roller 31 is in contact with the moving beam 12.

[0038] In this embodiment, a rectangular roller hole 21 along the height direction of the rolling assembly 3 and a circular bearing hole 22 perpendicular to the height direction of the rolling assembly 3 are opened on the moving side of the connecting sleeve 2 .

[0039] In this embodiment, the gap between the rectangular roller hole 21 and the left and right ends of the rolling component 3 is c1, and the gap between the rectangular roller hole 21 and the upper and lower sides of the rolling component 3 is c2, wherein the adjustment range of c1 is 0.1cm≤c1≤5cm, and the adjustment range of c2 is 0.1cm≤c2≤5cm.

[0040] In this embodiment, the side edges of the rectangular roller hole 21 are all grinded structures.

Claims

1. A telescopic connection assembly on a bridge steel anti-collision guardrail, characterized in that: It comprises beams (1), connecting sleeves (2), rolling assemblies (3) and anchor bolts (4) on both sides of an expansion joint, wherein the beam (1) comprises a fixed beam (11) and a movable beam (12), one end of the connecting sleeve (2) is fixed in the fixed beam (11) by means of the anchor bolts (4), and the other end of the connecting sleeve (2) extends into the movable beam (12); the rolling assembly (3) is fixedly mounted at the end of the connecting sleeve (2) and can roll in the movable beam (12); The rolling assembly (3) comprises one or more coaxial vertical rollers (31), one or more coaxial horizontal rollers (32), and cylindrical bearings (5) used in conjunction with the vertical rollers (31) and the horizontal rollers (32); the cylindrical bearings (5) respectively pass through the vertical rollers (31), the horizontal rollers (32), and the connecting sleeve (2) and are then welded and fixed to the connecting sleeve (2).

2. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 1 is characterized in that: The fixed crossbeam (11) and the movable crossbeam (12) have the same external dimensions and are located on the same axis; the ends of the fixed crossbeam (11) and the movable crossbeam (12) are both aligned with the end lines of the bridge beams.

3. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 1 is characterized in that: The vertical roller (31) and the horizontal roller (32) both include a steel roller (6) and a nylon layer (7) wrapped therearound, and the inner diameter of the steel roller (6) is the same as the diameter of the cylindrical bearing (5).

4. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 1 is characterized in that: The diameter of the vertical roller (31) is smaller than the vertical length of the inner ring of the moving beam (12) by a certain dimension a, and the diameter of the horizontal roller (32) is smaller than the transverse length of the inner ring of the moving beam (12) by a certain dimension b; the values ​​of a and b increase with the increase of the span and the length of the bridge structure, but are not greater than the difference between the inner ring length of the moving beam (12) and the outer ring length of the connecting sleeve (2) in their respective directions.

5. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 1 is characterized in that: The longitudinal distance between the vertical roller (31) and the horizontal roller (32) is d, wherein 10 cm ≤ d ≤ 50 cm.

6. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 1 is characterized by: The horizontal center axis of the cylindrical bearing (5) of the vertical roller (31) is located below the horizontal center axis of the connecting sleeve (2), and the lower end of the vertical roller (31) is in contact with the moving crossbeam (12).

7. The telescopic connection assembly on the bridge steel anti-collision guardrail according to any one of claims 1 to 4, characterized in that: A rectangular roller hole (21) along the height direction of the rolling component (3) and a circular bearing hole (22) perpendicular to the height direction of the rolling component (3) are provided on the moving side of the connecting sleeve (2).

8. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 7 is characterized in that: The gap between the rectangular roller hole (21) and the left and right ends of the rolling assembly (3) is c1, and the gap between the rectangular roller hole (21) and the upper and lower sides of the rolling assembly (3) is c2, wherein the adjustment range of c1 is 0.1 cm≤c1≤5 cm, and the adjustment range of c2 is 0.1 cm≤c2≤5 cm.

9. The telescopic connection assembly on the bridge steel anti-collision guardrail according to claim 7, characterized in that: The side edges of the rectangular roller hole (21) are all of a ground edge structure.

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