CN107901550B

CN107901550B - Manufacturing process of composite material interlayer cylindrical shell structure

Info

Publication number: CN107901550B
Application number: CN201711123531.XA
Authority: CN
Inventors: 陈建中; 朱央炫; 吕泳
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2017-11-14
Filing date: 2017-11-14
Publication date: 2020-05-05
Anticipated expiration: 2037-11-14
Also published as: CN107901550A

Abstract

The invention discloses a manufacturing process of a composite material interlayer cylindrical shell structure. The cylindrical shell structure comprises an inner liner layer, an inner structure layer, an interlayer structure and an outer structure layer from inside to outside in sequence; the lining layer, the inner structure layer and the outer structure layer are all made of resin-based composite materials by a traditional winding process; the sandwich structure is formed by winding an upper thin sheet and a lower thin sheet on an inner structure layer, wherein the upper thin sheet and the lower thin sheet form a skeleton structure after being separated by partition blocks. And the method also comprises the step of winding the framework structure in the circumferential direction by adopting a resin-based composite material to form a winding structure. The sheet-block-sheet framework structure of the invention allows the upper and lower sheets to be mutually staggered and to be more easily wound on a pipeline. The winding structure and the inner and outer structure layers are made of the same material, and can be effectively combined together, so that the interface problem is avoided. Because the skeleton texture is hollow structure, can greatly reduce the material quantity when improving cylindrical shell structure conch wall thickness, reduce the structure dead weight to realize improving the purpose of rigidity reduce cost.

Description

Manufacturing process of composite material interlayer cylindrical shell structure

Technical Field

The invention belongs to the technical field of composite materials, and particularly relates to a composite material interlayer cylindrical shell structure and a manufacturing method thereof.

Background

At present, various cylindrical shell structures made of resin-based composite materials, such as pipelines, storage tanks and the like, have the remarkable advantages of light weight, high strength, corrosion resistance and the like, have more excellent mechanical properties compared with the cylindrical shell structures made of traditional concrete materials and metal materials, but the resin-based composite materials are low in self elastic modulus, so that the structural rigidity is low, and large deformation is easily generated under the action of external load. For example, if the rigidity of a common resin-based composite pipeline (glass steel pipe) is not enough, large radial deformation and further damage can be caused, and serious engineering accidents can be caused. If the rigidity is improved, two common methods are adopted, one method is to simply increase the wall thickness, so that the material cost is inevitably greatly increased; another approach is to use a sandwich structure. The sandwich structure can improve the structural section inertia moment while keeping economical efficiency, thereby improving the structural rigidity, and the composite material sandwich plate structure is applied to various industries, including a honeycomb structure applied to aviation. But the current sandwich structures are mainly applied to the panels.

Disclosure of Invention

The invention aims to provide a manufacturing process of a composite material interlayer cylindrical shell structure, which has high rigidity and low cost and is easy to realize.

In order to achieve the purpose, the technical scheme is as follows:

the manufacturing process of the composite material sandwich cylindrical shell structure comprises the steps that the cylindrical shell structure sequentially comprises an inner liner layer, an inner structure layer, a sandwich structure and an outer structure layer from inside to outside; the lining layer, the inner structure layer and the outer structure layer are all made of resin-based composite materials by a traditional winding process; the sandwich structure is formed by winding an upper thin sheet and a lower thin sheet on an inner structure layer, wherein the upper thin sheet and the lower thin sheet form a skeleton structure after being separated by partition blocks.

According to the scheme, the method further comprises the step of winding the framework structure in the circumferential direction by adopting the resin matrix composite material to form a winding structure.

According to the scheme, the upper and lower sheets are in a belt-shaped structure or a net-shaped structure and are made of metal materials, high polymer materials or composite materials; the shapes and materials are the same or different, and the widths are the same.

According to the scheme, the dividing block is of a hollow or solid structure; the cross section of the steel plate comprises a round shape, a polygon shape and an I shape; the width is not more than the width of the upper and lower sheets; the material is metal material, high molecular material or composite material.

According to the scheme, the dividing block is freely clamped between the two sheets or is adhered to one of the two sheets; when the sandwich structure is manufactured by winding, the relative positions of the upper and lower sheets can be freely staggered.

Compared with the prior art, the invention has the following beneficial effects:

the sheet-block-sheet framework structure of the invention allows the upper and lower sheets to be mutually staggered and to be more easily wound on a pipeline.

The winding structure and the inner and outer structure layers are made of the same material, and can be effectively combined together, so that the interface problem is avoided.

Because the skeleton texture is hollow structure, can greatly reduce the material quantity when improving cylindrical shell structure conch wall thickness, reduce the structure dead weight to realize improving the purpose of rigidity reduce cost.

Drawings

FIG. 1: the shell wall of the composite material sandwich cylindrical shell structure is schematic;

FIG. 2: a single-layer framework sandwich structure is schematically shown in longitudinal section;

FIG. 3: a longitudinal section schematic diagram of a double-layer framework sandwich structure;

FIG. 4: a schematic diagram of a preparation system;

FIG. 5: a schematic diagram of the sandwich structure production;

FIG. 6: manufacturing a framework structure and winding a schematic diagram;

wherein, 1-an inner liner layer; 2-inner structural layer; 3-a sandwich structure; 4-a winding structure; 5-framework structure; 6-outer structural layer; 7-skeleton structure making and pulling out system; 8-manufacturing a winding system by using a sandwich structure; 9-a skeleton structure winding system; 10-manufacturing a winding system for the pipeline; 11-winding the host machine and the mould by the pipeline; 12-an inner liner winding system; 13-inner structural layer winding system; 14-outer structural layer winding system; 15-flake a; 16-sheet B; 17-a spacer transfer device; 18-a spacer block; 19-creel chassis; 20-continuous fiber yarn or fabric.

Detailed Description

The following examples further illustrate the technical solutions of the present invention, but should not be construed as limiting the scope of the present invention.

Example 1

The shell wall of the composite material sandwich cylindrical shell structure is schematically shown in figure 1 and comprises an inner lining layer 1, an inner structure layer 2, a sandwich structure 3 and an outer structure layer 6, wherein the inner lining layer 1, the inner structure layer 2 and the outer structure layer 6 are all made of resin matrix composite materials. The sandwich structure 3 is manufactured by a secondary winding process.

Referring to fig. 1, 5 and 6, the manufacturing method mainly comprises the following steps:

1) winding and manufacturing a resin-based lining layer 1 and an inner structure layer 2 according to a traditional process;

2) the sheet A15 and the sheet B16 are thin metal strips, the separating block 18 is a hollow metal cylinder, the framework structure 5 formed by combining two sheets and the separating block is provided, the separating block 18 is transferred between the two sheets by a separating block transfer device 17, glass fiber is arranged in a yarn disc underframe 19, then continuous fiber yarn or fabric 20 is pulled out to be wound on the framework structure 5 in a circumferential direction to form a winding structure 4, and the framework structure 5 and the winding structure 4 are wound on the surface of the inner structure layer 2 in a circumferential direction according to a fiber winding method to form the complete sandwich structure 3.

3) And winding the resin-based outer structure layer 6 according to the traditional process.

The longitudinal section of the single-layer framework sandwich structure is shown in figure 2.

The longitudinal section of the double-layer framework sandwich structure is shown in figure 3.

The schematic diagram of the composite material interlayer cylindrical shell structure preparation system is shown in figure 4: the framework structure manufacturing and pulling-out system 7 and the framework structure winding system 9 form a sandwich structure manufacturing and winding system 8, and the pipeline winding host machine and the mould 11, the inner liner winding system 12, the inner structure layer winding system 13 and the outer structure layer winding system 14 form a pipeline winding system 10. The carcass structure 5 and the winding structure 4 are manufactured by the sandwich construction manufacturing winding system 8 and wound on the pipe manufactured by the pipe manufacturing winding system 10.

Example 2:

this example is substantially the same as example 1, except for step 2), two sheets were made of the composite material in step 2) of example 1.

Example 3:

this example is substantially the same as example 1, except that step 2), two sheets are made of a polymer material in step 2) of example 1.

Example 4:

this example is substantially the same as example 1 except that step 2), in step 2) of example 1, plastic grids were used for the sheet a15 and the sheet B16.

Example 5:

this example is substantially the same as example 1 except that step 2), in step 2) of example 1, a solid metal cylinder is used as the spacer.

Example 6:

this example is substantially the same as example 1 except for step 2), and in example 1, a solid composite cylinder was used for the spacer block in step 2).

Example 7:

this example is substantially the same as example 1 except that step 2), in step 2) of example 1, a solid polymer cylinder is used as the spacer.

The sandwich structure of the sheet-block-sheet adopted by the invention is also suitable for other cylindrical shell structures such as resin-based composite material storage tanks, the manufacturing method and the embodiment are similar to those of resin-based composite material pipelines, the inner lining layer, the inner structure layer and the outer structure layer are manufactured by adopting the traditional manufacturing process, and the sandwich structure is wound to the inner structure layer in the circumferential direction according to the fiber winding method.

The composite material interlayer cylindrical shell structure manufactured by the invention takes a pipeline as an example, and compared with a solid pipeline manufactured by the traditional process with the same rigidity grade, the composite material interlayer cylindrical shell structure has the advantages of less adopted materials, lighter weight, low cost, high rigidity and easiness in transportation, construction and installation, and has better economic benefit while meeting engineering requirements. In the same way, the rigidity and the cost of the storage tank structure manufactured by the method can be optimized to the same degree. Because the upper and lower sheets of the framework structure are staggered, the sheets are easy to wind on the surface of the inner structure layer when being wound in the circumferential direction, and the process manufacturing is easy. Because the sandwich structure of sheet-block-sheet is adopted, the hollow part can be pre-embedded with a sensor to detect the stress condition and the damage degree of the structure, so that the structure is safer and more reliable. Therefore, the product has the characteristics of high rigidity, low cost, high safety and easiness in manufacturing, and the purpose of the invention is realized.

Claims

1. The manufacturing process of the composite material sandwich cylindrical shell structure is characterized in that the cylindrical shell structure sequentially comprises an inner liner layer, an inner structure layer, a sandwich structure and an outer structure layer from inside to outside; the lining layer, the inner structure layer and the outer structure layer are all made of resin-based composite materials by a traditional winding process; the sandwich structure is manufactured by forming a framework structure by adopting an upper thin sheet and a lower thin sheet after adopting partition blocks to separate, winding the framework structure by adopting a resin-based composite material in a circumferential direction to form a winding structure, and winding the framework structure and the winding structure on the surface of an inner structure layer in a circumferential direction according to a fiber winding method; the cutting block is freely clamped between the two sheets or is adhered to one of the two sheets; when the sandwich structure is manufactured by winding, the relative positions of the upper and lower sheets can be freely staggered.

2. The process for manufacturing the composite material sandwich cylindrical shell structure according to claim 1, wherein the upper and lower thin sheets are in a band-shaped structure or a net-shaped structure and made of a metal material, a polymer material or a composite material; the shapes and materials are the same or different, and the widths are the same.

3. A process for making a sandwich cylindrical shell structure of a composite material according to claim 1, wherein said segments are hollow or solid; the cross section of the steel plate comprises a round shape, a polygon shape and an I shape; the width is not more than the width of the upper and lower sheets; the material is metal material, high molecular material or composite material.