CN113246499B - Large-diameter fiber composite material pipe and preparation method and system thereof - Google Patents
Large-diameter fiber composite material pipe and preparation method and system thereof Download PDFInfo
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- CN113246499B CN113246499B CN202110543823.9A CN202110543823A CN113246499B CN 113246499 B CN113246499 B CN 113246499B CN 202110543823 A CN202110543823 A CN 202110543823A CN 113246499 B CN113246499 B CN 113246499B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/78—Moulding material on one side only of the preformed part
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention belongs to the field of bridge equipment, and particularly relates to a large-diameter composite material pipe and a preparation method and a system thereof. The outer diameter of the large-diameter fiber composite material pipe is larger than 100mm, and the method is characterized by comprising the following steps of: step (1): preparing a fiber longitudinal standard block, wherein the longitudinal standard block is an arc-shaped plate, and socket connectors are respectively arranged on two sides of the longitudinal standard block; step (2): assembling a plurality of longitudinal standard blocks through socket joints, brushing resin glue on the joint, assembling into a pipe, and temporarily fixing by adopting hoops; step (3): pre-tensioning fiber winding is carried out on the spliced tube by adopting the fiber after gum dipping; step (4): and (5) solidifying and forming to obtain the finished pipe. The invention solves the technical and economic cost problems of the existing pultrusion process for producing large-diameter pipe fittings.
Description
Technical Field
The invention belongs to the field of bridge equipment, and particularly relates to a large-diameter composite material pipe and a preparation method and a system thereof.
Background
With the rapid development of national economy, the foundation construction of China is greatly improved. As a bridge for important infrastructure, rapid developments have also been made in economic development. The importance of society requires that we must pay attention to the problems of strength, rigidity and stability. In recent years, natural disasters such as earthquakes, mountain floods and the like frequently occur, and under the influence of the disasters, many bridges are seriously damaged, so that huge economic losses are caused for me, and great threats are caused for the life safety of people. After the disaster occurs, the bridge collapses and breaks down, the traffic is blocked, the supply line is cut off, and huge resistance is brought to rescue and relief work. The fiber reinforced resin matrix composite material has the advantages of light weight, high specific strength, high specific modulus, high designability and the like.
The composite material pultrusion process has high production process efficiency, and the fibers in the composite material are longitudinally distributed, so that the longitudinal elastic modulus and the longitudinal strength of the composite material are relatively high, and a foundation is provided for preparing a composite material pulling and pressing rod piece. Currently, the pultrusion process is mature for single fiber composite pultrusion technology. But the fiber composite material has obvious advantages in cost control and mechanical properties. Current pultrusion processes are mature for smaller section production but there is insufficient research on pultrusion of larger diameter tubes.
Disclosure of Invention
The invention aims to provide a large-diameter composite material pipe and a preparation method and a system thereof, wherein the large-diameter fiber composite material pipe is prepared by carrying out block pultrusion on the composite material pipe, then splicing and winding with prestressed carbon fibers.
The technical solution for realizing the purpose of the invention is as follows: a method of making a large diameter fiber composite tube having an outer diameter greater than 100mm, the method comprising the steps of:
step (1): preparing a fiber longitudinal standard block, wherein the longitudinal standard block is an arc-shaped plate, and socket connectors are respectively arranged on two sides of the longitudinal standard block;
step (2): assembling a plurality of longitudinal standard blocks through socket joints, brushing resin glue on the joint, assembling into a pipe, and temporarily fixing by adopting hoops;
step (3): pre-tensioning fiber winding is carried out on the spliced tube by adopting the fiber after gum dipping;
step (4): and (5) solidifying and forming to obtain the finished pipe.
Further, in the step (1), a pultrusion method is adopted to prepare a fiber longitudinal standard block.
Further, the socket joint of the standard block in the step (2) is a groove and a protrusion inserted into the groove which are matched with each other;
when the assembly is carried out, the standard blocks at the bottom are fixed and assembled firstly, then the standard blocks at the two sides are symmetrically installed by utilizing the socket joint, the resin glue is coated at the socket joint, the standard blocks of the large-diameter fiber composite material pipe are assembled, and the two ends are temporarily fixed by using hoops after the assembly is completed.
Further, the step (3) specifically comprises: and (3) installing the assembled pipe in the step (2) on a fiber winding machine, removing the temporary hoops, controlling the tension system of the fiber through a tension controller, then making the fiber pass through a dipping tank, and making fiber winding preparation work on the assembled large-diameter fiber composite material pipe through a spinning nozzle on a movable trolley.
Further, the filament winding tension is 5% -10% of the tensile strength of the fibers; gradually reducing the tension of each layer from inside to outside; the winding speed is 25-50m/min.
A large-diameter fiber composite material pipe is prepared by the method.
Further, the composite material pipe is composed of resin and reinforcing fiber, preferably, the resin is thermosetting resin or thermoplastic resin, and the reinforcing fiber is carbon fiber and/or glass fiber; the preferred carbon fibers have a diameter of 6-10 μm and the glass fibers have a diameter of 5-20. Mu.m.
A system for preparing a large diameter fiber composite tube, comprising:
standard block pultrusion production line: preparation of standard blocks by means of pultrusion
Assembling device: the standard block is used for assembling the standard block into a pipe;
pretension fiber winding production line: and pre-tensioning fiber winding is carried out on the spliced tube by adopting the fiber after gum dipping.
Further, the standard block pultrusion production line comprises a creel, a yarn arranging device, a gum dipping system, a preforming die, a forming and curing die, a traction device, a cutting device and a product bracket which are connected in sequence.
Further, the pre-tensioned fiber winding line includes a tension controller, a dipping tank, and a traveling carriage with a laying nozzle.
Compared with the prior art, the invention has the remarkable advantages that:
(1) The preparation method of the large-diameter fiber composite material pipe provided by the invention adopts a preparation method of segmented pultrusion-splicing-pretension tension winding fibers, and solves the technical and economic cost problems of the existing pultrusion process for producing large-diameter pipe fittings.
(2) According to the preparation method, after assembly, the tension of the fibers is controlled by adopting the tension controller, so that the assembled pipe is wound, and the integrity and mechanical properties of the pipe fitting are ensured.
Drawings
FIG. 1 is a schematic diagram of a standard block preparation apparatus according to the present invention.
Fig. 2 is a block diagram of the present invention.
Fig. 3 is a schematic drawing of a composite tube pre-tensioned fiber winding.
Reference numerals illustrate:
1-creel, 2-yarn discharging device, 3-gum dipping system, 4-preforming die, 5-forming solid pressing die, 6-traction device, 7-cutting device, 8-product bracket, 9-assembling equipment, 10-socket, 11-standard block, 12-fiber, 13-tension controller, 14-gum dipping tank, 15-moving trolley and 16-spinning nozzle.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
A large diameter fiber composite tube is a hollow tubular structure with an outside diameter greater than 100mm, and typical cross-sectional configurations are provided in the present invention. The large-diameter fiber composite material pipe consists of resin and reinforcing fibers, wherein the resin matrix is commonly used thermosetting resin and thermoplastic resin, the reinforcing fibers are carbon fibers, glass fibers and the like, the diameter of the carbon fibers is generally 6-10 mu m, and the diameter of the glass fibers is generally 5-20 mu m. The volume ratio of each component in the pultrusion process can be designed in proportion according to actual engineering requirements.
The technological process of the large-diameter fiber composite material pipe comprises the following steps: firstly, preparing a standard block of a large-diameter fiber composite material pipe through pultrusion (as shown in figure 1), then splicing the standard block, carrying out fiber winding on the spliced large-diameter fiber composite material pipe by utilizing a winding machine, and finally curing and forming to obtain a finished pipe.
The number of standard blocks is determined by fully considering comprehensive factors such as the traction force of the existing pultrusion equipment, the manufacturing cost of the die, the assembly efficiency, the influence of an assembly interface on the mechanical properties of the pipe fitting and the like.
An apparatus for producing large-diameter fiber composite material pipe standard blocks is shown in fig. 1, and comprises a creel 1, a yarn discharging device 2, a gum dipping system 3, a preforming die 4, a forming and fixing die 5, a traction device 6, a cutting device 7 and a product bracket 8.
A preparation method of a large-diameter fiber composite material pipe. The method comprises the following steps:
(1) Large-diameter fiber composite pipe assembling equipment in place
The assembly equipment is schematically shown in fig. 2, and is arranged at two ends of a composite material pipe, the assembly equipment 9 is installed in place, the assembly bottom standard blocks 11 are fixed and assembled first, then the standard blocks at two sides are symmetrically installed by the socket 10 in sequence, the socket is coated with resin glue, the standard blocks of the large-diameter fiber composite material pipe are assembled, and the two ends are temporarily fixed by hoops after the assembly is completed.
(2) The large-diameter fiber composite material pipe is arranged on a fiber winding machine
The large-diameter fiber composite pipe 17 is mounted on a fiber winding machine (figure 3), temporary hoops are removed, needed fibers 12 are arranged, the fibers are subjected to tension control through a tension controller 13, then the fibers pass through a dipping tank 14, and fiber winding preparation work is carried out on the assembled large-diameter fiber composite pipe through a spinning nozzle 16 on a movable trolley 15.
(3) Pre-tensioned fiber winding
Too little fiber winding tension, the product strength is low, and too much fiber winding tension can increase the strength loss of the fiber and reduce the product strength. Therefore, the filament winding tension is appropriately selected, and the filament winding tension is appropriately 5% -10% of the tensile strength of the fibers as proved by experience.
Under the action of winding tension, the outer layer fiber generates radial contact pressure to the inner layer fiber, so that the inner layer is contracted and deformed, and meanwhile, the winding layer generates the phenomenon of inner elasticity and outer tightness.
Too small winding speed and low production efficiency; the winding speed is too high, the pipe rotating speed is too high, resin centrifugal splashing is easy to occur, and the fiber cannot be well infiltrated. Therefore, the winding speed is preferably controlled to 25-50m/min.
The winding angle is selected to be too small, the transverse strength is weakened, the longitudinal bending rigidity is improved, and the longitudinal tensile strength is weakened when the winding angle is too large. The choice of the angle of filament winding will depend on the performance requirements of the wound article or the manner of winding.
(4) Curing and forming
And after the pre-tension fiber winding is completed, the pipe fitting is cured to obtain a finished pipe. .
Claims (8)
1. A method of making a large diameter fiber composite tube having an outer diameter greater than 100mm, the method comprising the steps of:
step (1): preparing a fiber longitudinal standard block by adopting a pultrusion method, wherein the longitudinal standard block is an arc-shaped plate, and socket connectors are respectively arranged on two sides of the longitudinal standard block;
step (2): assembling a plurality of longitudinal standard blocks through socket joints, wherein the socket joints of the standard blocks are grooves matched with each other and bulges inserted into the grooves;
during assembly, the standard blocks at the bottom are fixed and assembled, then the standard blocks at the two sides are symmetrically installed by using socket joints in sequence, resin glue is coated at the socket joints, the standard blocks of the large-diameter fiber composite material pipe are assembled, and the two ends are temporarily fixed by using hoops after the assembly is completed;
step (3): pre-tensioning fiber winding is carried out on the spliced tube by adopting the fiber after gum dipping; the method comprises the following steps: installing the assembled pipe in the step (2) on a fiber winding machine, removing the temporary hoops, controlling the tension system of the fiber through a tension controller, then making the fiber pass through a dipping tank, and making fiber winding preparation work on the assembled large-diameter fiber composite material pipe through a spinning nozzle on a movable trolley; the winding tension of the fiber is 5% -10% of the tensile strength of the fiber; gradually reducing the tension of each layer from inside to outside; the winding speed is 25-50m/min;
step (4): and (5) solidifying and forming to obtain the finished pipe.
2. A large diameter fiber composite tube prepared by the method of claim 1.
3. The composite tube of claim 2, consisting of resin and reinforcing fibers.
4. A composite pipe according to claim 3, wherein the resin is a thermosetting resin or a thermoplastic resin and the reinforcing fibres are carbon fibres and/or glass fibres.
5. The composite tube of claim 4, wherein the carbon fibers have a diameter of 6-10 μm and the glass fibers have a diameter of 5-20 μm.
6. A manufacturing system employed in the manufacturing method of a large-diameter fiber composite pipe according to claim 1, comprising:
standard block pultrusion production line: preparing a standard block by means of pultrusion;
assembling device: the standard block is used for assembling the standard block into a pipe;
pretension fiber winding production line: and pre-tensioning fiber winding is carried out on the spliced tube by adopting the fiber after gum dipping.
7. The system of claim 6, wherein the modular pultrusion line includes a creel, a yarn ejector, a dipping system, a pre-form, a form curing die, a traction device, a cutting device, and an article carrier connected in sequence.
8. The system of claim 7, wherein the pre-tensioned fiber winding line includes a tension controller, a dipping tank, and a traveling carriage with a laying nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110543823.9A CN113246499B (en) | 2021-05-19 | 2021-05-19 | Large-diameter fiber composite material pipe and preparation method and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110543823.9A CN113246499B (en) | 2021-05-19 | 2021-05-19 | Large-diameter fiber composite material pipe and preparation method and system thereof |
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| Publication Number | Publication Date |
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| CN113246499A CN113246499A (en) | 2021-08-13 |
| CN113246499B true CN113246499B (en) | 2023-05-05 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201380565Y (en) * | 2009-03-26 | 2010-01-13 | 大庆汉维长垣高压玻璃钢管道有限公司 | Pipe orifice connecting internal lock slot forming unit of large bore pipes |
| CN102179945B (en) * | 2011-04-25 | 2013-03-06 | 盐城市强力电工绝缘材料厂 | Production process of large-calibre epoxy glass fiber and braided strap winding extrusion draw pipe |
| CN103589127B (en) * | 2012-08-15 | 2016-12-21 | 上海杰事杰新材料(集团)股份有限公司 | A kind of high transverse strength pultruded structural sheet material and preparation method thereof |
| CN111186150A (en) * | 2020-03-06 | 2020-05-22 | 南京工业大学 | Composite material combined column with pultruded profile as core material |
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