CN215907195U

CN215907195U - FRP rib pipe

Info

Publication number: CN215907195U
Application number: CN202121655690.6U
Authority: CN
Inventors: 曾岚; 陆华强; 袁鸿; 黄世清; 莫子永; 范军委; 吴礼旗; 凌雪仪; 李国铿
Original assignee: Jinan University
Current assignee: Jinan University
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-02-25
Anticipated expiration: 2031-07-20

Abstract

The utility model discloses an FRP rib pipe, which comprises an FRP impregnated fiber forming pipe, a plurality of FRP longitudinal ribs and a double-wall sleeve, wherein the plurality of FRP longitudinal ribs surround a longitudinal rib cylinder, two adjacent longitudinal rib cylinders are connected through the double-wall sleeve, the longitudinal rib cylinder is arranged on the inner wall of the FRP impregnated fiber forming pipe, one end of the longitudinal rib cylinder, far away from the double-wall sleeve, is flush with the FRP impregnated fiber forming pipe, and the FRP impregnated fiber forming pipe is connected with the double-wall sleeve. The utility model can greatly improve the integral rigidity and the lateral resistance, and the combination of the FRP rib pipe, the steel pipe and the concrete can greatly improve the ultimate bearing capacity of the combined structure column, so that the performance of the FRP material can be fully exerted.

Description

FRP rib pipe

Technical Field

The utility model relates to the technical field of building engineering and conforming materials, in particular to an FRP rib pipe.

Background

With the wide application of reinforced concrete in structural engineering, various engineering problems appear in high-rise, heavy-load and large-span fields, such as reinforcement corrosion, shortage of fresh water and river sand resources and the like, and the development requirements of ocean engineering and offshore buildings restrict the further expansion of reinforced concrete. Meanwhile, with the appearance and rapid development of new materials, for example, fiber-reinforced polymer (FRP) has excellent properties such as light weight, high strength, good tensile property, corrosion resistance, electromagnetic resistance, excellent designability and the like, meets the industrial requirements of modern construction technology, and can excellently solve the problems of reinforcement corrosion and resource shortage when being combined with common concrete and seawater and sea sand concrete.

With the research and the application of new FRP materials in engineering becoming more and more extensive, FRP rib materials and FRP pipes are manufactured by molding technologies such as FRP pultrusion and winding, and the FRP rib materials and the FRP pipes, the FRP rib materials, the FRP pipe, the seawater sea sand concrete, the coral concrete, the steel pipe and the like form novel combined structures such as FRP reinforced concrete, FRP pipe-concrete-steel pipe double-wall hollow combined columns and the like. The FRP pipe is filled with concrete, the durability, the corrosion resistance and the compression resistance are high at normal temperature, but the FRP pipe is formed by winding in the annular direction, if the FRP longitudinal ribs are not arranged, the lateral force resistance is poor, the member is easy to bend, and the FRP pipe cannot fully exert the excellent tensile property in the early stage of failure. However, at present, a mature, efficient and stable FRP rib pipe preparation process does not exist, and often, due to the fact that the number of connecting points of the FRP longitudinal ribs is too large, and meanwhile, a constructor still needs to perform manual operation with low precision according to personal experience, the quality of a finished product is difficult to guarantee due to the fact that the operation is complicated, the number is large, and the experience and the manual performance are poor, and the construction work of the FRP rib pipe is difficult to rapidly expand due to the fact that the preparation process efficiency is too low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides an FRP rib pipe.

The purpose of the utility model is realized by the following technical scheme: the FRP rib pipe comprises an FRP impregnated fiber forming pipe, a plurality of FRP longitudinal ribs and a double-wall sleeve, wherein the FRP longitudinal ribs are enclosed into a longitudinal rib cylinder, two adjacent longitudinal rib cylinders are connected through the double-wall sleeve, the longitudinal rib cylinder is installed on the inner wall of the FRP impregnated fiber forming pipe, one end, far away from the double-wall sleeve, of the longitudinal rib cylinder is parallel and level to the FRP impregnated fiber forming pipe, and the FRP impregnated fiber forming pipe is connected with the double-wall sleeve.

Preferably, the double-wall casing comprises an annular partition plate and two mounting rings, one surface of the annular partition plate is connected with one mounting ring, the other surface of the annular partition plate is connected with the other mounting ring, the mounting rings are provided with a plurality of through holes, the through holes and the annular partition plate form a plurality of mounting circular grooves, the longitudinal rib cylinders are mounted in the mounting circular grooves, and one surface, far away from the annular partition plate, of each mounting ring is connected with the FRP (fiber reinforced plastic) impregnated fiber forming pipe.

Preferably, the annular partition plate and the mounting ring are connected through integral molding.

Preferably, the material for manufacturing the FRP longitudinal bar comprises CFRP, GFRP, BFRP, AFRP or PET FRP.

Preferably, the material for making the FRP impregnated fiber forming tube comprises CFRP, GFRP, BFRP, AFRP or PET FRP.

Preferably, the cross-sectional shape of the double-walled casing comprises a circle or a polygon.

The manufacturing method of the FRP rib pipe is characterized by comprising the following steps:

s1, selecting a plurality of FRP longitudinal ribs and a plurality of double-wall sleeves which are suitable according to the FRP rib pipe design;

s2, according to the FRP rib pipe design, arranging and fixing a plurality of FRP longitudinal ribs according to the cross-sectional shape of the double-wall sleeve pipe to obtain a longitudinal rib cylinder;

s3, rotating the longitudinal reinforcement cylinder, winding the FRP impregnated fiber yarns on the outer surface of the longitudinal reinforcement cylinder in an annular manner, exposing two ends of the longitudinal reinforcement cylinder out of the FRP impregnated fiber yarns, forming an FRP impregnated fiber forming pipe after the FRP impregnated fiber yarns are cured, and forming the longitudinal reinforcement fiber pipe by the longitudinal reinforcement cylinder and the FRP impregnated fiber forming pipe;

s4, polishing and leveling the two exposed ends of the longitudinal rib cylinder in the step S3;

s5, injecting bar-planting glue into the installation circular groove of the double-wall sleeve, connecting two adjacent longitudinal rib cylinders through the double-wall sleeve to form a semi-finished FRP rib pipe, and cutting off FRP longitudinal ribs exposed at two ends of the semi-finished rib pipe to obtain the finished FRP rib pipe.

The manufacturing method of the FRP rib pipe is characterized in that the exposed lengths of the two ends of the longitudinal rib cylinder in the step S3 are the same.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. according to the utility model, the integral rigidity and the lateral resistance of the FRP resin impregnated fiber forming pipe are greatly improved through the FRP longitudinal rib and the double-wall sleeve, the limit bearing capacity of the combined structure column can be greatly improved by combining the FRP rib pipe with the steel pipe and the concrete, and the performance of the FRP material can be fully exerted.

2. The method for manufacturing the FRP rib pipe is suitable for manufacturing FRP rib pipes with different diameters, different section shapes and different lengths, and can also select FRP longitudinal ribs with different quantities and different FRP types as materials, so that the method is simple to operate, reasonable in structural design, efficient and rapid in preparation, low in price and high in connection quality.

Drawings

FIG. 1 is a schematic view of an FRP tendon pipe of the present invention;

FIG. 2 is a schematic view of an FRP tendon tube of the present invention;

FIG. 3 is a schematic view of an FRP tendon tube of the present invention;

FIG. 4 is a schematic view of a longitudinal rib fiber pipe (both ends of the FRP longitudinal rib are exposed) of the FRP rib pipe of the utility model;

FIG. 5 is a schematic view of a longitudinal rib fiber pipe (one end of the FRP longitudinal rib is cut away) of the FRP rib pipe of the utility model;

FIG. 6 is a schematic view showing the connection between the FRP longitudinal ribs and the double-walled sleeve of the present invention;

FIG. 7 is a top view of a double wall sleeve of the FRP tendon pipe of the present invention;

FIG. 8 is a cross-sectional view of a double wall sleeve of the FRP tendon of the present invention;

FIG. 9 is a schematic diagram of a FRP rib pipe according to the present invention, in which the longitudinal rib fiber pipe is manufactured (the direction of the arrow is the winding direction);

reference numbers for parts in the drawings: 1. a longitudinal rib cylinder; 11. FRP longitudinal ribs; 2. FRP resin impregnated fiber forming tubes; 3. a double-walled casing; 31. installing a circular groove; 32. an annular partition plate; 33. a mounting ring; 4. FRP impregnated fiber yarns; 5. longitudinal rib fiber tube.

Detailed Description

The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.

FRP muscle pipe, including FRP soaks fat fiber forming tube 2, muscle 11 and double-walled sleeve pipe 3 are indulged to many FRP, muscle 11 encloses into to indulge a muscle section of thick bamboo 1 along many FRP, two adjacent muscle section of thick bamboos 1 are indulged through the connection of double-walled sleeve pipe 3, it indulges muscle fiber pipe 5 to install the inner wall formation that FRP soaks fat fiber forming tube 2 to indulge a muscle section of thick bamboo 1, the one end of indulging muscle fiber pipe 5 and being close to double-walled sleeve pipe 3 exposes and indulges a muscle section of thick bamboo 1, the outer muscle section of thick bamboo 1 that indulges that exposes is used for inserting double-walled sleeve pipe 3 internal fixation, indulge muscle fiber pipe and keep away from the muscle section of thick bamboo one end that double-walled sleeve pipe 3 indulge muscle section of thick bamboo 1 and FRP soaks fat fiber forming tube 2 parallel and levels with FRP, it does not expose also to indulge a muscle section of thick bamboo 1.

The material for manufacturing the FRP impregnated fiber forming pipe 2 comprises CFRP, GFRP, BFRP, AFRP and PET FRP, and the FRP impregnated fiber forming pipe 2 is formed by winding FRP impregnated fiber filaments 4 on an FRP longitudinal bar 11. The FRP longitudinal ribs 11 are made of CFRP (carbon Fiber Reinforced plastic), GFRP (glass Fiber Reinforced plastic), BFRP (basic Fiber Reinforced plastic), AFRP (aramid Fiber Reinforced plastic) and PET FRP (polyethylene terephthalate Fiber Reinforced plastic), and the FRP longitudinal ribs 11 may surround the longitudinal ribs 1 of different shapes, thereby functioning as a framework and enhancing the lateral resistance of the FRP tube. The diameter (the section shape is circular) or the width (the section shape is square) of the outer wall of the double-wall sleeve 3 is the same as that of the FRP rib pipe, and the strength and the rigidity are both larger than that of the FRP. Double-walled sleeve pipe 3 is used for connecting two adjacent muscle fiber tube 5 of indulging (indulge a muscle section of thick bamboo 1 promptly and connect through double-walled sleeve pipe 3), can solidify through the bar planting glue and connect, and double-walled sleeve pipe 3's diameter size and cross-sectional shape can be made according to the design of concrete FRP muscle pipe, and double-walled sleeve pipe 3's cross-sectional shape includes regular shapes such as circular or polygon, and the polygon in this embodiment is square.

Double-walled sleeve pipe 3 includes cyclic annular baffle 32 and two collar 33, the one side and the collar of cyclic annular baffle 32 are connected through integrated into one piece, the another side and another collar 33 of cyclic annular baffle 32 are connected through integrated into one piece, collar 33 is equipped with a plurality of through-holes, a plurality of mounting circular slots 31 are constituteed with cyclic annular baffle 32 to a plurality of through-holes, indulge the exposed many FRP of muscle fiber tube 5 and indulge muscle 11 and install respectively in a plurality of mounting circular slots 31, collar 33 keeps away from cyclic annular baffle 32 one side and FRP and soaks fat fiber forming tube and be connected.

The annular partition plate 32 separates the end portions of the two longitudinal FRP ribs 11, and the contact between the end portions of the longitudinal FRP ribs 11 and the annular partition plate 32 can prevent the occurrence of errors during the end portion treatment of the longitudinal FRP ribs 11, which results in the failure to ensure that the two ends of the longitudinal FRP ribs 11 in the installation circular grooves 31 are connected with the double-wall casing 3 at the same time. The mounting ring 33 is used to fix the end of the FRP longitudinal rib 11 so as not to fall off the mounting ring.

The manufacturing method of the FRP rib pipe can manufacture the FRP rib pipes with different lengths, different diameters and different cross-sectional shapes, simultaneously can select FRP longitudinal ribs 11 with different FRP types and different diameters, can wind FRP impregnated fiber yarns with different layers according to the strength requirement, and comprises the following steps:

s1, material selection: the FRP rib pipe design comprises the length, the section shape and the diameter of the rib pipe, the diameter and the number of the FRP longitudinal ribs 11 and the FRP type; selecting correspondingly matched FRP longitudinal ribs 11, wherein the FRP longitudinal ribs 11 are made of GFRP, the number of the FRP longitudinal ribs 11 is 16, the diameter of the FRP longitudinal ribs is 20mm, the length of the FRP longitudinal ribs is 600mm, the surface of the FRP longitudinal ribs is in a thread shape, and selecting an epoxy resin wet method hoop winding process. The double-walled sleeve 3 has a circular shape with a length of 60mm and an outer diameter of 200mm, and the fitting circular groove 31 has a diameter of 20 mm.

S2, fixing the FRP longitudinal ribs 11: according to the designed cross-sectional shape and diameter of the FRP rib pipe, the cross-sectional shape is circular, the plurality of FRP longitudinal ribs 11 are uniformly arranged according to the cross-sectional shape of the double-wall sleeve 3, and the plurality of FRP longitudinal ribs 11 are fixed to form the cylindrical FRP longitudinal rib cylinder 1, so that the FRP impregnated fiber yarn 4 is ensured not to deform when being wound.

S3, winding FRP impregnated fiber yarns 4: a muscle 11 section of thick bamboo is indulged to the rotation FRP, and the hoop winding FRP soaks fat cellosilk 4 and indulges 11 a surface of muscle along axial direction at the FRP and twine, and the both ends that the muscle 11 was indulged to the FRP all remain 30mm not by FRP soaks fat cellosilk 4 winding, and the muscle 11 is indulged to the FRP promptly is 30mm to the FRP's the length that exposes that soaks fat cellosilk 2. Obtaining an FRP impregnated fiber forming tube 2 after the FRP impregnated fiber filaments 4 are solidified; the winding thickness of the FRP impregnated fiber yarn 4 can be changed according to the design requirement, so that the FRP impregnated fiber forming tube 2 with different strength and thickness can be obtained. The FRP resin impregnated fiber forming tube 2 and the FRP longitudinal rib cylinder 1 form a longitudinal rib fiber tube 5.

S4, processing the end part of the FRP longitudinal rib 11: the end (the end connected with the double-wall sleeve 2) of the FRP longitudinal rib 11 exposed from the two ends of the longitudinal rib fiber pipe 5 is polished and leveled, so that the end of the FRP longitudinal rib 11 for connection and each mounting circular groove 31 of the double-wall sleeve 3 can be accurately connected and matched, namely, after the end of the FRP longitudinal rib 11 is inserted into the mounting circular groove 31 of the double-wall sleeve 3, the end of the FRP longitudinal rib 11 can be contacted with the annular partition plate 32.

S5, connecting and cutting the longitudinal rib fiber tube 5: inside pouring into double-walled sleeve pipe 3's a plurality of installation circular slots 31 respectively with the bar planting glue, overflow from the installation circular slots 31 a little until the bar planting glue, indulge the FRP of muscle fiber tube 5 with two and indulge the muscle tip and insert the both ends of double-walled sleeve pipe 3 respectively, it contacts with double-walled sleeve pipe 3's cyclic annular baffle 32 until the FRP of indulging muscle fiber tube 5 indulges the tip of muscle 11, the bar planting glue lets double-walled sleeve pipe 3 with indulge the complete solidification of muscle fiber tube 5 and be connected the back, obtain semi-manufactured goods FRP muscle pipe. And cutting the end parts of the FRP longitudinal ribs 11 exposed at the other ends of the two longitudinal rib fiber tubes 5 (namely the two ends of the semi-finished FRP rib tube) to obtain the finished FRP rib tube.

The FRP rib pipe in the embodiment only contains an FRP longitudinal rib 11, the FRP impregnated fiber yarn 4 is wound in the annular direction to form a longitudinal rib fiber pipe 5, and the longitudinal rib fiber pipe is connected and formed by the double-wall sleeve 3. The method can be suitable for FRP longitudinal ribs 11 with different diameters and different quantities, and also suitable for FRP rib pipes with different lengths, different diameters and cross-sectional shapes.

The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.

Claims

The FRP rib pipe is characterized by comprising an FRP impregnated fiber forming pipe, a plurality of FRP longitudinal ribs and a double-wall sleeve, wherein the plurality of FRP longitudinal ribs are enclosed to form a longitudinal rib cylinder, two adjacent longitudinal rib cylinders are connected through the double-wall sleeve, the longitudinal rib cylinder is arranged on the inner wall of the FRP impregnated fiber forming pipe, one end, far away from the double-wall sleeve, of the longitudinal rib cylinder is flush with the FRP impregnated fiber forming pipe, and the FRP impregnated fiber forming pipe is connected with the double-wall sleeve.
2. The FRP rib pipe as claimed in claim 1, wherein the double-walled sleeve comprises an annular partition and two mounting rings, one side of the annular partition is connected with one mounting ring, the other side of the annular partition is connected with the other mounting ring, the mounting rings are provided with a plurality of through holes, the plurality of through holes and the annular partition form a plurality of mounting circular grooves, the longitudinal rib cylinder is mounted in the plurality of mounting circular grooves, and one side of the mounting ring far away from the annular partition is connected with the FRP impregnated fiber forming pipe.
3. The FRP tendon pipe as claimed in claim 2 wherein the annular partition and the mounting ring are connected by integral molding.
4. The FRP rib pipe as claimed in claim 1, wherein the material for making the FRP longitudinal ribs comprises CFRP or GFRP or BFRP or AFRP or PET FRP.
5. The FRP tendon pipe as claimed in claim 1 wherein the material of the FRP resin impregnated fiber formed pipe comprises CFRP or GFRP or BFRP or AFRP or PET FRP.
6. The FRP tendon as claimed in claim 1, wherein the cross-sectional shape of the double-walled sleeve comprises a circle or a polygon.