CN210088192U

CN210088192U - High-pressure-bearing high-elongation pipeline structure

Info

Publication number: CN210088192U
Application number: CN201920684667.6U
Authority: CN
Inventors: 沈锐利; 陈巍; 陈鑫; 苗如松
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-02-18
Anticipated expiration: 2029-05-14

Abstract

The utility model discloses a high-pressure-bearing high-elongation pipeline structure, which comprises an external protective cylinder and an internal supporting spring; the outer protective cylinder and the inner supporting spring are coaxially arranged, the inner supporting spring is a continuous spiral spring, and the inner supporting spring is tangent to the inner wall of the outer protective cylinder; the outer protective cylinder is made of an aluminum alloy material, and the inner supporting spring is made of a high-strength steel wire material. The utility model adopts the thin-wall external pile casing made of aluminum alloy and is matched with the internal supporting spring made of high-strength steel wires, so that the pipeline structure has certain compressive strength in the radial direction and can resist certain radial pressure action; meanwhile, the pipe has certain ductility in the axial direction, and can meet the requirement of longitudinal stretching deformation of the pipe structure in the use process; the inside supporting spring can be stiffened to the part of the outside casing, and the situation that the outside casing is buckled and unstabilized locally in the compression process is avoided.

Description

High-pressure-bearing high-elongation pipeline structure

Technical Field

The utility model relates to a pipeline structure who uses among the bridge engineering, concretely relates to high pressure-bearing height elongates pipeline structure.

Background

A pipe structure is a structural form often used in bridge engineering. Such as corrugated pipes in prestressed concrete bridges, drainage pipes in main beams of bridge structures, dry air conveying pipes in dehumidification systems inside main cables of suspension bridges, and the like. The pipeline structure is often subjected to a larger radial pressure action in the bridge structure, for example, a dry air conveying pipeline in a dehumidification system in a main cable of the suspension bridge is subjected to the extrusion action of other surrounding steel wire strands after cable tightening operation; the prestressed tendon channel-corrugated pipe in the prestressed concrete bridge, the drainage pipeline in the bridge girder and the like can be under the action of larger pressure of the surrounding concrete, which puts forward a certain requirement on the radial pressure resistance of the pipeline structure.

At present, two types of pipeline structures commonly used in bridge engineering are plastic pipelines and metal pipelines. The plastic pipe has the following advantages: the corrosion resistance is good, and the corrosion protection of the internal prestressed tendon can be improved; the physical property is good, the electric conduction is not realized, the stray current corrosion can be prevented, the sealing performance is good, and the rust is avoided; the rubber is impermeable under the action of load and has good impact resistance; the friction coefficient is small, and the prestress damage in the prestressed tendon tensioning process can be reduced. However, the plastic pipe also has certain defects, which are mainly characterized in that the pressure resistance is poor, especially the radial pressure born by the pipe structure arranged inside the main cable is often very large, and the common plastic pipe cannot bear the pressure action. The metal pipeline has the advantages of good compression resistance, high strength and the like. However, the metal pipeline has relatively high compressive strength and relatively poor deformability and longitudinal flexibility, and the requirement for line shape in the process of erecting the main cable is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high pressure-bearing height elongates pipeline structure, this pipeline structure also possess certain linear deformation harmony when possessing certain radial compressive strength, can cooperate construction technology such as corrugated pipe grout of suspension bridge main push-towing rope frame or prestressed concrete bridge well.

For solving the technical problem, the utility model discloses the technical scheme who adopts does:

a high-pressure-bearing high-elongation pipeline structure comprises an external protective cylinder and an internal supporting spring; the outer protective cylinder and the inner supporting spring are coaxially arranged, the inner supporting spring is a continuous spiral spring, and the inner supporting spring is tangent to the inner wall of the outer protective cylinder; the outer protective cylinder is made of an aluminum alloy material, and the inner supporting spring is made of a high-strength steel wire material.

According to the scheme, the outer protective cylinder is provided with the plurality of air escape through holes which are uniformly and longitudinally dispersed along the outer protective cylinder.

Compared with the prior art, the beneficial effects of the utility model are that: the thin-wall external casing made of aluminum alloy is matched with the internal supporting spring made of high-strength steel wires, so that the pipeline structure has certain compressive strength in the radial direction and can resist certain radial pressure; meanwhile, the pipe has certain ductility in the axial direction, and can meet the requirement of longitudinal stretching deformation of the pipe structure in the use process; the inside supporting spring can be stiffened to the part of the outside casing, and the situation that the outside casing is buckled and unstabilized locally in the compression process is avoided.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention used as a dry air duct in a dehumidification system inside a main cable;

fig. 3 is a schematic view of the structure of the present invention when used as a bellows in a prestressed concrete bridge.

Detailed Description

The following description will be made in conjunction with the accompanying drawings, wherein the reference numerals are given by way of illustration: pipeline structure 1, outside casing 2, inside supporting spring 3, escape gas through-hole 4, main cable segment 5, dry gas flow direction 6, dry gas diffusion direction 7, concrete segment 8, radial pressure 9.

The utility model provides a high pressure-bearing height extends pipeline structure comprises outside casing 2 and inside supporting spring 3, and inside supporting spring 3 protects a section of thick bamboo 2 to outside and carries out local stiffening, avoids outside casing 2 to appear local bucking unstability situation at the pressurized in-process. The outer protective cylinder 2 is made of aluminum alloy, can be a common 6063 type aluminum alloy material, and has the advantages of good specific rigidity and specific strength, good plasticity and machinability, certain corrosion resistance, good weldability, light weight, good ductility and the like. The internal supporting spring 3 is made of common galvanized high-strength steel wires and has various strength grade forms of 1670MPa, 1770MPa, 1860MPa, 1960MPa, 2060MPa and the like. The high-strength steel wire has higher radial compressive strength and certain longitudinal flexibility. The external pile casing 2 has two forms of non-small hole and small hole, and can be used in the prestressed tendon channel-corrugated pipe in prestressed concrete bridge and the dry air conveying pipeline in the dehumidification system in the main cable of suspension bridge.

The utility model provides a technical scheme that its technical problem adopted is: the outer protective cylinder 2 is made of aluminum alloy materials and has a hollow thin-wall cylindrical shape, and the outer protective cylinder 2 has certain compressive strength and deformability so as to adapt to extrusion deformation in the construction process; the spiral inner supporting spring 3 made of high-strength steel wire materials is arranged in the outer protective barrel 2, and the diameter and the pitch of the inner supporting spring 3 are selected according to actual engineering requirements. For example, a dry air conveying pipeline in a main cable with the diameter of 50mm can be made into a spiral spring with the pitch of 25mm by selecting high-strength steel wires with the diameter of 5mm and the strength grade of 1860MPa, and the spiral spring is used for locally stiffening an aluminum alloy pipeline with the wall thickness of 10 mm. The pipeline structure with the structure can bear the action of radial pressure of more than 10MPa, and the requirement on the compression resistance of the air supply pipeline in the main cable is met. The inner supporting spring 3 is tightly tangent to the inner wall of the outer protective cylinder 2 to support the outer protective cylinder 2 and avoid the outer protective cylinder from being flattened; a certain number of air escape through holes 4 can be formed in the outer casing 2, so that dry air in the main cable air supply pipe can be conveniently diffused into the main cable, wet air in the main cable can be sufficiently removed, the interior of the main cable can be kept dry, and corrosion of the high-strength steel wire can be reduced, as shown in fig. 2. Or the outer casing 2 is not provided with air escape holes 4, and the pipeline structure is used in a corrugated pipe structure for a prestressed concrete bridge, so that the corrugated pipe structure can resist the pressure action of the surrounding concrete, as shown in figure 3.

Claims

1. The utility model provides a high pressure-bearing height prolongs pipeline structure which characterized in that: comprises an external protective cylinder (2) and an internal supporting spring (3); the external protective cylinder (2) and the internal supporting spring (3) are coaxially arranged, the internal supporting spring (3) is a continuous spiral spring, and the internal supporting spring (3) is tangent to the inner wall of the external protective cylinder (2); the external pile casing (2) is made of an aluminum alloy material, and the internal supporting spring (3) is made of a high-strength steel wire material.

2. The high pressure-bearing high elongation pipeline structure according to claim 1, wherein: a plurality of air escape through holes (4) are formed in the outer protective cylinder (2), and the air escape through holes (4) are arranged along the longitudinal uniform dispersion of the outer protective cylinder (2).