Bridge guardrail end connecting structure

Abstract

The utility model discloses a bridge guardrail end connecting structure which comprises a sleeve (1), two adjacent steel pipes (2) are inserted into the two ends of the sleeve (1) respectively, a partition plate (3) located between the two steel pipes (2) is arranged in the sleeve (1), spherical spring plates (4) are arranged on the two sides of the partition plate (3), the diameter of the outer circle of each spring plate (4) is matched with the diameter of an inner hole of each steel pipe (2), and the middle of each spring plate (4) protrudes outwards. Screw rods (5) penetrating through the corresponding spring plates (4) are arranged on the two sides of the partition plate (3), the screwing directions of threads on the two screw rods (5) are opposite, supporting sleeves (6) are arranged on the screw rods (5), and the supporting sleeves (6) are located between the spring plates (4) and the partition plate (3); and the screw (5) is coaxial with the sleeve (1) and penetrates through the middle part of the spring plate (4). The bridge guardrail has the advantages of being convenient to disassemble and assemble and capable of improving the attractiveness of the bridge guardrail.

Description

Technical Field

[0001] The utility model belongs to the field of bridge guardrails, and in particular relates to an end connection structure of a bridge guardrail. Background Art

[0002] The existing bridge guardrail includes multiple rows of steel pipes and multiple columns distributed up and down, the lower ends of the columns are fixed to the bridge, and the multiple rows of steel pipes pass through the multiple columns.

[0003] Since the length of the bridge far exceeds the longest steel pipe available on the market, each row of steel pipes is made up of multiple steel pipes connected in series. There is an assembly gap between the ends of adjacent steel pipes, and due to the uneven ground of the bridge, there may be misalignment between the ends of adjacent steel pipes. Therefore, a connecting structure is required to cover the gap and align the ends of adjacent steel pipes for a more beautiful appearance.

[0004] In the existing bridge guardrail, the connection structure between the ends of adjacent steel pipes is a sleeve, and the connecting ends of the adjacent steel pipes are respectively inserted from both ends of the sleeve. To prevent the sleeve from axial movement, the sleeve is screwed or welded to the steel pipe.

[0005] The existing bridge guardrail end connection structure has the following defects: when the sleeve is welded to the steel pipe, when the guardrail is impacted by external force, such as after being impacted by an out-of-control vehicle, the steel pipe is deformed and needs to be replaced. The connection structure needs to be reassembled and disassembled. When disassembling and assembling, the deformed steel pipe needs to be cut off first and then welded back to a new steel pipe, which is troublesome. When the sleeve is connected to the steel pipe with screws, it is necessary to drill holes and tap on the newly replaced steel pipe. The drilling and tapping are generally carried out on site, but many steel pipes are made of stainless steel. Stainless steel has good toughness and poor heat dissipation, so drilling and tapping are difficult, which also brings troubles to the disassembly and assembly operations and increases the maintenance operation cycle of the bridge guardrail.

[0006] Therefore, the existing bridge guardrail end connection structure has the defect that the disassembly and assembly operation is relatively troublesome. Utility Model Content

[0007] The purpose of the utility model is to provide a bridge guardrail end connection structure. The utility model has the advantages of convenient disassembly and assembly and can improve the aesthetics of the bridge guardrail.

[0008] The technical solution of the utility model: a bridge guardrail end connection structure, including a sleeve with two adjacent steel pipes inserted into the two ends respectively, a partition located between the two steel pipes is arranged in the sleeve, spherical spring plates are arranged on both sides of the partition, the outer diameter of the spring plate matches the inner hole diameter of the steel pipe, the middle part of the spring plate protrudes outward, screws passing through the corresponding spring plates are arranged on both sides of the partition, the threads on the two screws are rotated in opposite directions, a support sleeve is arranged on the screw, and the support sleeve is located between the spring plate and the partition.

[0009] In the aforementioned bridge guardrail end connection structure, the screw rod is coaxial with the sleeve, and the screw rod passes through the middle of the spring plate.

[0010] In the aforementioned bridge guardrail end connection structure, a through hole is provided in the middle of the spring plate through which a screw rod passes, and a tubular flange is provided on the edge of the through hole formed by outward stamping, and the inner hole of the flange is threadedly connected to the screw rod.

[0011] In the aforementioned bridge guardrail end connection structure, a rubber ring is provided on the outer side of the spring plate.

[0012] In the aforementioned bridge guardrail end connection structure, the outer side of the spring plate is bent inward to form a curling edge, and the curling edge is embedded in the rubber ring.

[0013] Compared with the prior art, the utility model is provided with a partition in the casing, screws are provided on both sides of the partition, and a spherical spring plate is provided on the screw. The spring plate is driven to move axially by the screw, so that the spring plate is deformed and the outer diameter changes. When the outer diameter of the spring plate becomes larger, the spring plate is tightened in the steel pipe to fix the casing. When the outer diameter of the spring plate becomes smaller, the spring plate is separated from the steel pipe, and there is no connection between the casing and the steel pipe. The steel pipe can be taken out axially, which is convenient for disassembly and assembly, and the maintenance operation cycle of the bridge guardrail can be reduced. In addition, since the connection point between the casing and the steel pipe is located inside the steel pipe, there are no welding seams and screws on the outside of the casing and the steel pipe, which improves the aesthetics of the bridge guardrail. Therefore, the utility model has the advantages of convenient disassembly and assembly and can improve the aesthetics of the bridge guardrail. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is the left side view of the spring plate.

[0016] The markings in the accompanying drawings are: 1- casing, 2- steel pipe, 3- partition, 4- spring plate, 5- screw, 6- support sleeve, 7- flange, 8- rubber ring, 9- curling. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0018] Example. The bridge guardrail end connection structure is prefabricated in the workshop, such as Figure 1As shown, it includes a sleeve 1 with two adjacent steel pipes 2 inserted at both ends respectively, a partition 3 located between the two steel pipes 2 is arranged in the sleeve 1, spherical spring plates 4 are arranged on both sides of the partition 3, the outer diameter of the spring plate 4 matches the inner hole diameter of the steel pipe 2, the middle part of the spring plate 4 protrudes outward, and screws 5 passing through the corresponding spring plates 4 are arranged on both sides of the partition 3. The screw 5 is coaxial with the sleeve 1, and the screw 5 passes through the middle part of the spring plate 4. The threads on the two screws 5 are rotated in opposite directions. A support sleeve 6 is provided on the screw 5, and the support sleeve 6 is located between the spring plate 4 and the partition 3.

[0019] A through hole is provided in the middle of the spring plate 4 through which the screw rod 5 passes. A tubular flange 7 formed by outward stamping is provided on the edge of the through hole. The inner hole of the flange 7 is screwed to the screw rod 5 .

[0020] The outer side of the spring plate 4 is provided with a rubber ring 8, and the outer side of the spring plate 4 is bent inward to form a curling edge 9, and the curling edge 9 is embedded in the rubber ring 8. The rubber ring 8 can be a rubber ring with an annular groove on the inner wall, and the outer edge of the spring plate 4 can be inserted into the rubber ring 8. The rubber ring 8 can also be obtained by molding a flexible material such as PVC onto the outer edge of the spring plate 4 using a dipping process.

[0021] When the inner diameter of the steel pipe 2 is 8 cm, the thickness of the spring plate 4 can be 1 mm, and the material of the spring plate 4 is preferably 65Mn.

[0022] Assembly method: In the initial state, rotate the spring plates 4 on both sides so that the spring plates 4 slightly press the support sleeve 6 so that the support sleeve 6 can remain basically coaxial with the sleeve 1. After inserting the steel pipes 2 on both sides into the two ends of the sleeve 1, the clearance between the steel pipe 2 and the sleeve 1 is matched, and the spring plate 4 is elastically connected to the inner hole of the steel pipe 2 through the rubber ring 8. Rotate the sleeve 1, and the sleeve 1 drives the screw 5 to rotate through the partition 3. The screw 5 moves the spring plate 4 inward. Since the steel pipe 2 gives the spring plate 4 circumferential resistance through the rubber ring 8, the spring plate 4 will not rotate with the screw 5. The spring plate 4 moves axially inward. The spring plate 4 is opened by the support sleeve 6, and the diameter becomes larger. The spring plate 4 is fixed in the steel pipe 2 through the rubber ring 8, and the sleeve 1 cannot move axially.

[0023] When the deformed steel pipe is removed, the sleeve 1 is rotated in the reverse direction to pull the steel pipe 2 out axially.

[0024] The design highlights of this utility model include the following:

[0025] 1) The spherical spring plate 4 is opened or contracted by driving the screw through the sleeve, and a firm connection or disconnection is established between the spring plate 4 and the steel pipe 2, which avoids drilling and is convenient for disassembly and assembly. There are no exposed screws or welding parts between the sleeve and the steel pipe, which is more beautiful.

[0026] 2) By setting a flange 7 on the spring plate 4, the release area between the spring plate 4 and the screw 5 is increased to avoid slipping of the screw 5 when it rotates. The screw 5 can be driven to rotate with greater force, making the connection between the sleeve 1 and the steel pipe 2 more stable.

[0027] 3) By arranging a rubber ring 8 on the outer edge of the spring plate 4, not only can the friction between the spring plate 4 and the steel pipe 2 be increased, making the connection between the sleeve 1 and the steel pipe 2 more stable, but also the spring plate 4 can be prevented from rotating with the rotation of the screw 5, further facilitating disassembly and assembly.

[0028] 4) By providing the curling edge 9, the outer edge of the spring plate 4 is not sharp (such as punching burrs), preventing the rubber ring 8 from being cut during extrusion.

[0029] Comparative example: A bridge guardrail end connection structure comprises a sleeve 1 with two adjacent steel pipes 2 inserted at both ends, and both ends of the sleeve 1 are connected to the steel pipes 2 by two set screws.

[0030] In the comparative example, the steel pipe 2 does not need to be punched or tapped, but in order to meet the installation requirements for the set screws and prevent the set screws from slipping, the sleeve 1 is required to have a relatively large wall thickness, which will damage the appearance of the bridge guardrail.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

Claims

1. The bridge guardrail end connection structure is characterized by: The invention comprises a sleeve (1) with two adjacent steel pipes (2) inserted into the sleeve (1) at both ends, a partition (3) located between the two steel pipes (2) being arranged inside the sleeve (1), spherical spring plates (4) being arranged on both sides of the partition (3), the outer diameter of the spring plate (4) being matched with the inner diameter of the steel pipe (2), the middle part of the spring plate (4) protruding outward, screws (5) passing through the corresponding spring plates (4) being arranged on both sides of the partition (3), the threads on the two screws (5) being rotated in opposite directions, a support sleeve (6) being arranged on the screw (5), and the support sleeve (6) being located between the spring plate (4) and the partition (3).

2. The bridge guardrail end connection structure according to claim 1, characterized in that: The screw rod (5) is coaxial with the sleeve (1), and the screw rod (5) passes through the middle of the spring plate (4).

3. The bridge guardrail end connection structure according to claim 1, characterized in that: A through hole through which the screw rod (5) passes is provided in the middle of the spring plate (4), and a tubular flange (7) formed by outward stamping is provided on the edge of the through hole, and the inner hole of the flange (7) is screwed to the screw rod (5).

4. The bridge guardrail end connection structure according to claim 1, characterized in that: A rubber ring (8) is provided on the outer side of the spring plate (4).

5. The bridge guardrail end connection structure according to claim 4 is characterized in that: The outer side of the spring plate (4) is bent inwardly to form a curling edge (9), and the curling edge (9) is embedded in the rubber ring (8).

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