CN113276439B - Composite material winding pipe, inflatable core mould and processing method of composite material winding pipe - Google Patents
Composite material winding pipe, inflatable core mould and processing method of composite material winding pipe Download PDFInfo
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- CN113276439B CN113276439B CN202110551294.7A CN202110551294A CN113276439B CN 113276439 B CN113276439 B CN 113276439B CN 202110551294 A CN202110551294 A CN 202110551294A CN 113276439 B CN113276439 B CN 113276439B
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- 239000002131 composite material Substances 0.000 title claims abstract description 190
- 238000004804 winding Methods 0.000 title claims abstract description 167
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000013011 mating Effects 0.000 claims description 28
- 239000000835 fiber Substances 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000012784 inorganic fiber Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004567 concrete Substances 0.000 abstract description 57
- 238000004873 anchoring Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004046 wet winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 210000004712 air sac Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005490 dry winding Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009755 vacuum infusion Methods 0.000 description 1
Classifications
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/40—Plastics, e.g. foam or rubber
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a composite material winding pipe, an inflatable core mold and a processing method of the composite material winding pipe, wherein the composite material winding pipe comprises a first structural layer, a second structural layer and a shear key, the second structural layer is connected outside the first structural layer, the shear key comprises a matching part and a fixing part, the matching part is connected between the first structural layer and the second structural layer, one end of the fixing part is connected with the matching part, and the other end of the fixing part extends out of the first structural layer towards a direction far away from the second structural layer. The composite material winding pipe is used for internally pouring concrete to form a composite material winding pipe-concrete combined member, the shear key arranged inside the composite material winding pipe-concrete combined member improves the integrity and mechanical property of the composite material winding pipe-concrete combined member, part of the structure of the shear key extends out of the first structural layer and is solidified together with the first structural layer, the shear key cannot damage the composite material winding pipe in the assembly process, the shear key is tightly combined with the composite material winding pipe, and the structural strength of the winding pipe is increased.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a composite material winding pipe, an inflatable core mold and a processing method of the composite material winding pipe.
Background
The composite material winding pipe has the advantages of good corrosion resistance, light weight, processability, easiness in design, stable performance and the like, is widely applied to industries such as oil and gas transportation, petrochemical industry, civil engineering and the like, and is usually combined with concrete to form a composite material-concrete combined member (beam, column, shear wall and the like) when the composite material winding pipe is applied to the civil engineering and the building field, wherein the most typical characteristic is that the composite material winding pipe constrains the concrete, so that the composite material-concrete combined member has good mechanical properties.
However, the composite material winding pipe in the prior art is made of composite materials, so that the surface of the composite material winding pipe is smooth, the composite material winding pipe is easy to generate interface sliding phenomenon in the process of being combined with concrete, and the mechanical property of the composite material-concrete combined member is greatly reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the composite material winding pipe which has high structural strength, and can greatly improve the mechanical property of the composite material-concrete combined member when being combined with concrete to form the composite material-concrete combined member, thereby solving the technical problem that the composite material winding pipe in the prior art has smooth surface and is easy to cause interface sliding phenomenon in the process of being combined with concrete.
A second object of the present invention is to provide an inflatable mandrel.
A third object of the present invention is to provide a method for manufacturing a composite material wound pipe.
A composite wrapped tube according to an embodiment of the invention includes: a first structural layer; the second structural layer is connected outside the first structural layer; the shear key comprises a matching part and a fixing part, wherein the matching part is connected between the first structural layer and the second structural layer, one end of the fixing part is connected with the matching part, and the other end of the fixing part extends out of the first structural layer towards the direction away from the second structural layer.
According to the composite material winding pipe provided by the embodiment of the application, the shear key is arranged on the composite material winding pipe, the matching part of the shear key is connected between the first structural layer and the second structural layer, the first structural layer and the second structural layer are matched to limit the position of the shear key, so that the position of the shear key relative to the composite material winding pipe is stable, the structural strength of the composite material winding pipe is increased, one end of the fixing part on the shear key is connected to the matching part, the other end of the fixing part extends out from the first structural layer, and when the composite material winding pipe and concrete are combined to form a composite material-concrete combined member, the shear key can generate stable mechanical anchoring at the contact part of the composite material winding pipe and the concrete, the contact area of the composite material winding pipe and the concrete is increased, the interface performance is greatly improved, the slipping phenomenon of the interface is avoided, and the integrity and the mechanical performance of the composite material-concrete combined member are remarkably improved. The composite material winding pipe has the advantages of good corrosion resistance, high hoop strength, good integrity and high internal interface shear strength.
According to the composite material winding pipe of one embodiment of the present invention, the fitting portion is a sheet-like structure fitted between the first structural layer and the second structural layer.
Optionally, the composite material winding pipe is a cylindrical pipe, the matching part is a thin sheet with curvature, and two opposite sides of the matching part are respectively attached to the first structural layer and the second structural layer.
Optionally, the length of the fixing portion extending out of the first structural layer is smaller than the radius of the composite material winding pipe, and an anchoring end is formed at one end of the fixing portion away from the matching portion.
According to the composite material winding pipe of one embodiment of the invention, the fixing part is in a rod shape or a sheet shape.
According to the composite material winding pipe of one embodiment of the invention, the shear keys comprise a plurality of shear keys which are arranged on the first structural layer at intervals; the plurality of mating portions of at least a portion of the shear key are spaced apart along the length of the first structural layer.
Optionally, a plurality of the fixing portions are arranged in a matrix form on the first structural layer; or a plurality of fixing parts are arranged on the first structural layer in a staggered way.
According to the composite material winding pipe provided by the embodiment of the invention, the shear key is at least one of a steel shear key, an FRP shear key or a plastic shear key.
The composite wrapped tube according to an embodiment of the invention, the first and second structural layers comprise at least one inorganic fiber wrapped layer and/or at least one organic fiber wrapped layer.
Optionally, the composite wrapped tube further comprises at least one resin layer, at least one of the resin layers being attached to the second structural layer.
An inflatable mandrel according to an embodiment of the present invention, the inflatable mandrel being mountable on a winding machine, comprising: the air bag is provided with an inflatable air valve, an inflatable cavity is formed in the air bag, the surface of the air bag is recessed towards the direction of the inflatable cavity to form a fixing groove, and the fixing part in the composite material winding pipe can be positioned in the fixing groove.
According to the inflatable mandrel provided by the embodiment of the invention, the fixing groove is formed on the surface of the air bag, so that on one hand, in the process of producing the composite material winding pipe, the fixing groove is used for positioning the fixing part in the composite material winding pipe to limit the position of the shear key, and the position of the shear key is ensured to be stable in the process of producing the composite material winding pipe; on the other hand, the fixed groove can also play a role of avoiding the shear key, so that the other end of the fixed part can be ensured to stretch out smoothly from the first structural layer in the process of stretching out from the second structural layer, namely, the shear key is convenient to form in the composite material winding pipe in the process of producing the composite material winding pipe, and the interface sliding phenomenon can not occur when the composite material winding pipe is combined with concrete to form a composite material-concrete combined member.
The processing method of the composite material winding pipe comprises the following steps of: s1, inflating the inflation core mould by adopting the inflation core mould, wherein the inflation core mould is fixedly arranged on a winding machine; s2, winding continuous long fibers onto the inflatable core mold by adopting a wet circumferential winding method to form an uncured first structural layer; s3, placing a plurality of shear keys on the outer peripheral surface of the first uncured structural layer at intervals, enabling the matching parts to be located on the outer peripheral surface of the first uncured structural layer, and enabling one end of each fixing part to be matched in each fixing groove; s4, winding continuous long fibers on the matched part and the outer peripheral surface of the uncured first structural layer by adopting a wet circumferential winding method to form the uncured second structural layer, and enabling the matched part to be positioned between the uncured first structural layer and the uncured second structural layer; s5, taking the inflatable core die off the winding machine; s6, performing high-temperature curing on the first uncured structural layer and the second uncured structural layer; s7, exhausting the inflatable core mould, wherein the inflatable core mould is separated from the first structural layer and the matching part, and the cured first structural layer, the cured second structural layer and the shear key form the composite material winding pipe.
According to the processing method of the composite material winding pipe, before the composite material winding pipe is produced, an inflatable core mould is inflated and mounted on a winding machine, the winding machine can drive the inflatable core mould to rotate in working engineering, continuous long fibers can be wound on the inflatable core mould to form an uncured first structural layer, then a plurality of shear keys are placed on the outer peripheral surface of the uncured first structural layer at intervals, fixing parts of the shear keys are matched in fixing grooves on the surface of an air bag, after the shear keys are fixed, a layer of continuous long fibers is wound on the matching parts and the outer peripheral surface of the uncured first structural layer to form an uncured second structural layer, the positions of the shear keys can be limited by the matching of the first structural layer and the second structural layer, so that the shear keys are stable relative to the position of the composite material winding pipe, after the second structural layer is wound, the inflatable core mould is taken down from the winding machine and cured at high temperature, the inflatable core mould is exhausted after the high temperature curing is completed, the fixing parts on the shear keys can be separated from the fixing grooves, and the cured first structural layer, the second structural layer and the cured second structural layer can be separated from the inflatable core mould. The processing method of the composite material winding pipe is matched with the inflatable core mold to form the composite material winding pipe with the shear key, so that the phenomenon of interface sliding can not occur when the composite material winding pipe is combined with concrete for use, and the structural strength and the mechanical property of the composite material-concrete combined member are improved.
Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a composite wrapped tube according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a shear key according to an embodiment of the present invention.
FIG. 3 is a partial cross-sectional view of a shear key connection to a composite wrap tube in accordance with one embodiment of the present invention.
Fig. 4 is a schematic view of an inflatable mandrel according to an embodiment of the present invention.
Fig. 5 is a flow chart of a method of processing a composite wrapped tube according to an embodiment of the invention.
Fig. 6 is a schematic view of a first structural layer wrapped around an inflatable mandrel according to one embodiment of the present invention.
FIG. 7 is a schematic view of a shear key according to an embodiment of the present invention fitted on a first structural layer.
Fig. 8 is a schematic view showing a structure in which a composite material wound pipe according to an embodiment of the present invention is wound around an inflatable core mold.
Reference numerals:
100. Winding a pipe by using a composite material;
1. A first structural layer;
2. a second structural layer;
3. a shear key;
31. a mating portion; 32. a fixing part;
200. an inflatable core die;
210. An air bag;
2101. a valve; 2102. a fixing groove;
220. and fixing the column.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "inner", "outer", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
A composite wrapped tube 100 according to an embodiment of the present invention is described below with reference to the drawings.
A composite wrapped tube 100 according to an embodiment of the present invention, as shown in fig. 1, includes: a first structural layer 1, a second structural layer 2 and a shear key 3.
Wherein, as shown in fig. 1, the second structural layer 2 is connected outside the first structural layer 1. Here, the second structural layer 2 is located outside the first structural layer 1.
As shown in fig. 1 and 2, the shear key 3 includes a fitting portion 31 and a fixing portion 32, the fitting portion 31 is connected between the first structural layer 1 and the second structural layer 2, one end of the fixing portion 32 is connected to the fitting portion 31, and the other end of the fixing portion 32 extends from the first structural layer 1 toward a direction away from the second structural layer 2. Here, the fastening portion 32 extends through the first structural layer 1 and towards the side of the first structural layer 1 remote from the second structural layer 2.
As can be seen from the above structure, the composite material wound pipe 100 according to the embodiment of the present invention can protect the first structural layer 1 by connecting the second structural layer 2 to the outside of the first structural layer 1, thereby prolonging the service life of the first structural layer 1; in the second aspect, the second structural layer 2 can strengthen the structural strength of the composite material winding pipe 100 and improve the mechanical properties of the composite material winding pipe 100; in a third aspect, the second structural layer 2 and the first structural layer 1 cooperate to define the location of the shear key 3, ensuring that the shear key 3 is located in a stable position on the composite wrapped tube 100.
By connecting the mating portion 31 between the first structural layer 1 and the second structural layer 2, the first structural layer 1 and the second structural layer 2 cooperate to define the position of the mating portion 31, that is, the position of the shear key 3, so that after the production of the subsequent composite material wound tube 100 is completed, the position of the shear key 3 can be fixed without providing other fixing pieces, and the position of the shear key 3 is stable relative to the composite material wound tube 100.
One end of the fixing portion 32 on the shear key 3 extends out of the first structural layer 1 towards a direction away from the second structural layer 2, the fixing portion 32 is used for increasing the roughness of the surface of the composite material winding pipe 100, after the composite material winding pipe 100 is internally poured with concrete to form a composite material-concrete combined member, the fixing portion 32 extending out of the first structural layer 1 can provide stable mechanical anchoring, the interface performance is greatly improved, the occurrence of the interface sliding phenomenon is avoided, and meanwhile, the shear key 3 can also remarkably improve the integrity and the mechanical performance of the composite material-concrete combined member.
The mechanical properties include rigidity, strength, deformability, and the like.
It can be understood that, compared with the prior art, the composite material winding pipe 100 of the present application embeds a part of the structure of the shear key 3 into the composite material winding pipe 100, and another part of the structure of the shear key 3 extends from the first structural layer 1 in a direction away from the second structural layer 2, so as to obtain a composite material winding pipe 100 with good integrity and high internal interface shear strength, and when the composite material winding pipe 100 of the present application is used in combination with concrete to form a composite material-concrete composite member, no interface slip phenomenon occurs, and the interface performance is greatly improved.
Specifically, the first structural layer 1 and the second structural layer 2 are formed by winding continuous long fibers.
It should be noted that, in other examples, the composite wound tube 100 is not limited to the first structural layer 1 and the second structural layer 2, and may also include a third structural layer, a fourth structural layer, and the like, which are not particularly limited herein. For example: the third structural layer is connected outside the second structural layer 2, the fourth structural layer is connected outside the third structural layer, and the fixing portion 32 of the shear key 3 extends out of the first structural layer 1 towards the direction away from the outermost structural layer as long as the matching portion 31 of the shear key 3 is ensured to be positioned between the two structural layers.
In the description of the present invention, features defining "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of such features for distinguishing between the described features, no sequential or no light or heavy fraction.
In some embodiments of the present invention, as shown in connection with fig. 2 and 3, the fitting portion 31 is a sheet-like structure fitted between the first structural layer 1 and the second structural layer 2. Here, the mating portion 31 has a certain length and width, but the thickness of the mating portion 31 is far smaller than the length or width of the mating portion 31, so that the contact area between the mating portion 31 and the first structural layer 1 and the second structural layer 2 can be increased by the above arrangement, the connection strength of the mating portion 31 between the first structural layer 1 and the second structural layer 2 is improved, on the other hand, the spacing between the first structural layer 1 and the second structural layer 2 can be reduced by the mating portion 31 with a smaller thickness, and after the subsequent first structural layer 1 and the second structural layer 2 are cured at a high temperature, the first structural layer 1 and the second structural layer 2 can be closely adhered together to form an integral structure, so as to increase the structural strength of the composite material winding pipe 100.
Alternatively, as shown in fig. 1 and 3, the composite material wound tube 100 is a cylindrical tube, the mating portion 31 is a sheet with curvature, and opposite side surfaces of the mating portion 31 are respectively attached to the first structural layer 1 and the second structural layer 2. In the first aspect, the fitting portion 31 is more tightly connected between the first structural layer 1 and the second structural layer 2, that is, the shear key 3 is ensured to be firmly fixed, the structural stability of the composite material wound tube 100 is improved, and the structural strength of the composite material wound tube 100 is increased; in the second aspect, the space between the first structural layer 1 and the second structural layer 2 can be further reduced, and the first structural layer 1 and the second structural layer 2 can be closely attached together and form an integral structure after being cured at high temperature, so as to increase the structural strength of the composite material winding pipe 100; in a third aspect, after the sheet with curvature is fixed to the first structural layer 1, the shear key 3 does not affect the subsequent winding of the second structural layer 2.
Alternatively, the curvature of the mating portion 31 is equal to the curvature of the first and second structural layers 1, 2. After the matching part 31 is connected between the first structural layer 1 and the second structural layer 2, two opposite side surfaces of the matching part 31 can be respectively and tightly attached to the first structural layer 1 and the second structural layer 2.
It should be noted that, the composite material wound tube 100 is not limited to the above-mentioned cylindrical tube, and in other examples, the composite material wound tube 100 may be a square tube or a tube with other shapes, and when the composite material wound tube 100 is formed into a square tube, the mating portion 31 may be a rectangular sheet, so that two opposite sides of the mating portion 31 may be respectively bonded to the first structural layer 1 and the second structural layer 2.
Optionally, the length of the securing portion 32 extending out of the first structural layer 1 is less than the radius of the composite wrapped tube 100. Here, when the composite material winding pipe 100 is a cylindrical pipe, the length of the fixing portion 32 extending out of the first structural layer 1 is smaller than the radius of the composite material winding pipe 100, and by setting the length of the fixing portion 32, the first aspect can reduce the volume of the fixing portion 32, reduce the material consumption of the fixing portion 32, and save the production cost of the composite material winding pipe 100; in the second aspect, the fixing portion 32 with smaller volume occupies less inner space of the composite material winding pipe 100, so that more concrete can be conveniently poured inside the composite material winding pipe 100, and the structural strength of the composite material-concrete combined member is increased; in the third aspect, a plurality of shear keys 3 may be disposed on the composite winding pipe 100, and the plurality of shear keys 3 may not contact with each other, so that the fixing grooves 2102 for the fixing portion 32 are conveniently disposed on the inflatable mandrel 200, and the plurality of fixing grooves 2102 are independent from each other, that is, it is ensured that the inflatable mandrel 200 does not leak air after being inflated.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Of course, the length of the fixing portion 32 is not too short, and it is necessary to ensure that part of the structure of the fixing portion 32 can be extended into the interior of the concrete when the composite material is wound around the interior of the pipe 100 to cast the concrete. The specific length of the fixing portion 32 is not particularly limited herein, and a technician may select according to the size of the composite material wound pipe 100 and the number and positions of the shear keys 3 disposed on the composite material wound pipe 100.
Optionally, an end of the securing portion 32 remote from the mating portion 31 forms an anchored end. After the composite material winding pipe 100 is combined with concrete to form a composite material-concrete combined member, the anchoring end extends into the interior of the concrete, and stable mechanical anchoring is generated at the interface between the composite material winding pipe 100 and the concrete, so that the interface performance is greatly improved, and the integrity and mechanical performance of the composite material-concrete combined member are improved.
In some embodiments of the invention, the securing portion 32 is rod-shaped or sheet-shaped. The concrete structure of the fixing portion 32 formed in a rod shape can be seen in fig. 2, so that the fixing portion 32 has a certain length, and when the composite material winding pipe 100 and the concrete are combined to form a composite material-concrete combined member, the fixing portion 32 with a certain length can be anchored in the concrete, so that the contact area between the concrete and the composite material winding pipe 100 is increased, the shearing resistance of an interface is provided, stable mechanical anchoring is generated at the interface between the composite material winding pipe 100 and the concrete, the interface performance is greatly improved, and the occurrence of the interface sliding phenomenon is avoided.
In other examples, the shape of the fixing portion 32 is not limited to the rod-like or sheet-like shape described above, and the shape of the fixing portion 32 may be selected according to actual engineering requirements, and is not particularly limited herein.
In some embodiments of the present invention, as shown in fig. 1, the shear key 3 includes a plurality of shear keys 3 spaced apart on the first structural layer 1; at least part of the plurality of mating portions 31 of the shear key 3 are arranged at intervals along the length direction of the first structural layer 1. The plurality of shear keys 3 can further increase the structural strength of the composite material winding pipe 100 on one hand and improve the mechanical property of the composite material winding pipe 100; on the other hand, when the composite material wound pipe 100 is used in combination with concrete to form a composite material-concrete composite member, part of the fixing portions 32 on the plurality of shear keys 3 may simultaneously extend into the interior of the concrete, and stable mechanical anchoring is generated between the interface of the composite material wound pipe 100 and the concrete, greatly improving the interface performance.
Alternatively, the plurality of fixing portions 32 are arranged in a matrix form on the first structural layer 1. That is, the plurality of shear keys 3 are arranged in a matrix form on the composite wrap tube 100, so that the shear keys 3 can produce stable mechanical anchoring at the interface between the composite wrap tube 100 and the concrete.
In specific examples, the plurality of fixing portions 32 are disposed at intervals along the circumferential direction and the longitudinal direction of the first structural layer 1. So that the plurality of fixing portions 32 are arranged in a matrix form on the first structural layer 1, increasing the structural strength of the composite-material wound tube 100.
In other examples, the plurality of fixtures 32 are offset on the first structural layer 1. Here, the plurality of fixing portions 32 are disposed at intervals on the first structural layer 1, and are mainly used to increase the structural strength of the composite material winding pipe 100 and to generate stable mechanical anchoring at the interface between the composite material winding pipe 100 and the concrete, thereby greatly improving the interface performance.
In some embodiments of the invention, the shear key 3 is at least one of a steel shear key, an FRP (fiber reinforced composite, fiber Reinforced Polymer) shear key, or a plastic shear key. The structure can increase the structural strength of the shear key 3, so that the shear key 3 can generate stable mechanical anchoring between interfaces.
Optionally, the shear key 3 is a steel shear key, and the steel shear key is manufactured by adopting a welding process. The steel shear key has the advantages of high strength, good toughness, simple and convenient manufacture and the like, and the structural strength of the composite material winding pipe 100 can be increased by arranging the steel shear key on the composite material winding pipe 100.
In other examples, the shear key 3 is an FRP shear key, which is made using a vacuum infusion process. The FRP shear key has the advantages of high tensile strength, strong corrosion resistance and the like, so that the service life of the shear key 3 is prolonged, and the service life of the composite material-concrete combined member is further prolonged.
In other examples, the shear key 3 is a plastic shear key, which is made by an injection molding process. The plastic shear key has the advantages of strong corrosion resistance, low cost and the like, and can save the production cost of the composite material winding pipe 100.
Alternatively, when the shear key 3 is a steel shear key, the fixing portion 32 may be connected to the mating portion 31 by welding, so as to increase the connection strength between the fixing portion 32 and the mating portion 31, so that the assembled shear key 3 is structurally stable.
Of course, in other examples, the shear key 3 may alternatively be formed by an integral molding process. The integrated forming process can ensure that the shear key 3 does not need to weld, polish and other mechanical processing of the matching part 31 and the fixing part 32 in the early stage in the assembly process, effectively simplifies the assembly process and improves the production efficiency of the shear key 3.
In some embodiments of the invention, the first structural layer 1 and the second structural layer 2 comprise at least one inorganic fiber winding layer and/or at least one organic fiber winding layer. Here, it means that the first structural layer 1 and the second structural layer 2 each include at least one inorganic fiber wound layer and at least one organic fiber wound layer; alternatively, the first structural layer 1 and the second structural layer 2 comprise at least one inorganic fiber wound layer; alternatively, the first structural layer 1 and the second structural layer 2 comprise at least one organic fiber wound layer.
That is, the first and second structural layers 1 and 2 may be one of inorganic fiber wound layers and organic fiber wound layers, and the first and second structural layers 1 and 2 may be a combination of inorganic fiber wound layers and organic fiber wound layers. When the first structural layer 1 and the second structural layer 2 are organic fiber winding layers, the organic fiber winding layers can be flax fiber winding layers or aramid fiber winding layers; when the first structural layer 1 and the second structural layer 2 are inorganic fiber winding layers, the inorganic fiber winding layers can be glass fiber winding layers, carbon fiber winding layers or basalt fiber winding layers. The specific materials of the first structural layer 1 and the second structural layer 2 are not particularly limited, and a skilled person can select according to actual engineering requirements.
Optionally, the composite wrapped tube 100 further comprises at least one resin layer (not shown) attached to the second structural layer 2. In the subsequent curing process of the composite material wound tube 100, the resin layer can bond the first structural layer 1 and the second structural layer 2 together and form the composite material wound tube 100, so that the integrity of the composite material wound tube 100 is good and the structural stability of the composite material wound tube 100 is improved.
An inflatable mandrel 200 according to an embodiment of the present invention is described below with reference to the drawings.
An inflatable mandrel 200 according to an embodiment of the present invention, the inflatable mandrel 200 may be mounted on a winding machine (not shown), as shown in fig. 4, including: an air bag 210.
As shown in fig. 4, the inflatable air valve 2101 is disposed on the air bag 210, an inflatable cavity is formed inside the air bag 210, the surface of the air bag 210 is recessed toward the direction of the inflatable cavity to form a fixing groove 2102, and the fixing portion 32 in the composite material winding pipe 100 can be positioned in the fixing groove 2102.
As can be seen from the above structure, in the inflatable core mold 200 according to the embodiment of the present invention, by providing the air gate 2101 on the air bladder 210, when the inflatable core mold 200 is required to be used, the air bladder 210 can be inflated through the air gate 2101, and then the continuous filament is wound on the inflatable core mold 200 to form the uncured composite material wound pipe 100; when the uncured composite material wound pipe 100 is to be removed from the inflatable mandrel 200 after being cured at a high temperature, the bladder 210 may be vented through the valve 2101 to facilitate removal of the inflatable mandrel 200 from the first structural layer 1 and mating section 31.
Through setting up indent fixed slot 2102 at the surface of gasbag 210, in the in-process of producing combined material winding pipe 100, fixed slot 2102 is arranged in fixed portion 32 in the combined material winding pipe 100 in order to inject the position of shear key 3, guarantee the position stability of shear key 3 in the in-process of combined material winding pipe 100 production, and fixed slot 2102 can also play the effect of dodging shear key 3, ensure that the other end of fixed portion 32 stretches out smoothly in the in-process that stretches out from first structural layer 1 towards the direction of keeping away from second structural layer 2, that is, be convenient for form shear key 3 in the inside of combined material winding pipe 100 in the in-process of producing combined material winding pipe 100, when combined material winding pipe 100 is used with the concrete combination formation combined material-concrete composite member, the interface phenomenon of sliding can not appear.
It will be appreciated that the inflatable mandrel 200 of the present application, in contrast to the prior art, forms a concave anchoring groove 2102 in the surface of the bladder 210, the anchoring groove 2102 being used to locate and clear the anchoring portion 32 in the composite wrapped tube 100, facilitating the formation of a shear key 3 on the composite wrapped tube 100 that protrudes toward the interior of the composite wrapped tube 100.
In a specific example, the air bag 210 is cylindrical as a whole, fixing grooves 2102 are uniformly distributed on the outer surface of the cylinder, and the fixing grooves 2102 are recessed toward the inside of the air bag 210 for mounting the shear key 3.
Alternatively, bladder 210 may be made of a material with high deformability, such as rubber. So that the bladder 210 has the ability to deform under the influence of the gas.
Optionally, nitrogen may be used as the gas filling the interior of the balloon 210. The nitrogen has stable performance, does not react or decompose under the high-temperature condition, has no potential safety hazard problems such as inflammability, explosiveness and the like, and improves the safety of the inflatable core mould 200.
It should be noted that, the air gate 2101 needs to have good tightness, so as to facilitate the delivery and discharge of the air, and when the air bag 210 does not need to be exhausted when the air is delivered in the air inflation cavity, the air gate 2101 also needs to ensure that the air in the air inflation cavity is not discharged from the air gate 2101. The specific structure and materials of the valve 2101 are not particularly limited herein, and may be selected by the skilled artisan according to actual engineering requirements.
Optionally, as shown in fig. 4, the inflatable mandrel 200 further includes a securing post 220. The fixing columns 220 are disposed on two opposite sides of the air bag 210, and the fixing columns 220 are mainly used for connecting the inflatable core mold 200 to a winding machine, so that the winding machine can drive the inflatable core mold 200 to rotate in the working process, and preparation is made for winding the first structural layer 1 and the second structural layer 2 subsequently.
Alternatively, the fixing post 220 may be a steel bearing. The steel bearing itself has sufficient rigidity and strength for connection with the winding machine.
Optionally, the fixing slots 2102 include a plurality of fixing slots 2102 corresponding to the number of shear keys 3, each fixing slot 2102 being capable of locating a fixing portion 32 in a composite wrapped tube 100.
The method of processing the composite wrapped tube 100 according to the embodiment of the present invention is described below with reference to the drawings.
According to the method for processing the composite material winding pipe 100 in the embodiment of the invention, the inflatable core mold 200 is adopted, the inflatable core mold 200 is the inflatable core mold 200, and the structure of the inflatable core mold 200 is not described herein. As shown in fig. 5, the processing method of the composite material wound pipe 100 includes the steps of:
step S1, the inflatable core mold 200 is adopted, the inflatable core mold 200 is inflated, and the inflatable core mold 200 is fixedly arranged on a winding machine.
Step S2, winding continuous filament onto the inflatable mandrel 200 by a wet hoop winding method to form an uncured first structural layer 1 (refer to fig. 6).
In step S3, a plurality of shear keys 3 are placed at intervals on the outer peripheral surface of the uncured first structural layer 1 (refer to fig. 7), and the engaging portion 31 is located on the outer peripheral surface of the uncured first structural layer 1, and one end of the fixing portion 32 is engaged in the fixing groove 2102.
Step S4, winding continuous long fibers around the mating portion 31 and the outer peripheral surface of the uncured first structural layer 1 by a wet circumferential winding method to form an uncured second structural layer 2 (refer to fig. 8), and positioning the mating portion 31 between the uncured first structural layer 1 and the second structural layer 2.
And S5, removing the inflatable mandrel 200 from the winding machine.
Step S6, the uncured first structural layer 1 and the uncured second structural layer 2 are cured at a high temperature.
And S7, exhausting the inflatable mandrel 200, separating the inflatable mandrel 200 from the first structural layer 1 and the matching part 31, and forming the composite material winding pipe 100 by the cured first structural layer 1, the cured second structural layer 2 and the shear key 3.
As can be seen from the above processing method, in the processing method of the composite material winding pipe 100 according to the embodiment of the present invention, before the composite material winding pipe 100 is produced, the air core 200 is inflated through the air valve 2101 on the air core 200, so as to prepare for the subsequent winding of the first structural layer 1 and the second structural layer 2, after the air core 200 is inflated, the air core 200 is fixedly mounted on the winding machine through the fixing post 220 on the air core 200, so that the winding machine can drive the air core 200 to rotate during the operation of the winding machine, and during the rotation of the air core 200, continuous long fibers are wound on the air core 200 through the wet circumferential winding method to form the uncured first structural layer 1, and the schematic structural diagram of the wound first structural layer 1 and the air core 200 can be seen in fig. 6, and subsequently, a plurality of shear keys 3 are placed on the outer peripheral surface of the uncured first structural layer 1 at intervals, fixing parts 32 of the shear keys 3 are matched in fixing grooves 2102 on the surface of an air bag 210, a structural schematic diagram after the fixing of the shear keys 3 can be seen in fig. 7, after the fixing of the shear keys 3 is completed, a layer of continuous long fibers is wound on the matching parts 31 and the outer peripheral surface of the uncured first structural layer 1 to form an uncured second structural layer 2, a specific structural schematic diagram of the wound second structural layer 2 can be seen in fig. 8, the positions of the shear keys 3 can be limited by the matching of the first structural layer 1 and the second structural layer 2, so that the position of the shear keys 3 relative to the composite material winding pipe 100 is stable, after the winding of the second structural layer 2 is completed, the inflatable core mold 200 is taken off from the winding machine, the first structural layer 1 and the second structural layer 2 are cured at high temperature, after the high temperature curing is completed, the inflatable core mold 200 is exhausted through a valve 2101 on the inflatable core mold 200, at this time, the fixing portion 32 of the shear key 3 may be separated from the fixing groove 2102, and the cured first structural layer 1, the cured second structural layer 2, and the shear key 3 may be separated from the pneumatic mandrel 200 to form the composite material wound pipe 100. The processing method of the composite material winding pipe 100 is matched with the inflatable mandrel 200 to form the composite material winding pipe 100 with the shear key 3, so that the phenomenon of interfacial slippage can not occur when the composite material winding pipe 100 is combined with concrete for use, and the structural strength and the mechanical property of the composite material-concrete combined member are improved.
It should be emphasized that the first structural layer 1 and the second structural layer 2 are cured after the assembly of the shear key 3 is completed, so that the shear key 3 is ensured not to damage the composite material winding pipe 100 in the assembly process, and is tightly combined with the composite material winding pipe 100, so that the structural strength of the composite material winding pipe 100 is increased.
It can be understood that, compared with the prior art, the composite material winding pipe 100 of the present application embeds a part of the structure of the shear key 3 between the first structural layer 1 and the second structural layer 2 of the composite material winding pipe 100 from the internal structure, and the embedding stage is before the composite material winding pipe 100 is cured, so that the embedding of the shear key 3 is more compact; from the mechanical property aspect, the composite material winding pipe 100 with the built-in shear key 3 still has the advantages of corrosion resistance, high circumferential tensile strength and the like which are the same as those of the traditional composite material winding pipe, meanwhile, the composite material winding pipe 100 with the built-in shear key 3 can form stronger and more reliable interface connection with concrete when being combined with the concrete, and the integrity and the mechanical property of the composite material-concrete combined member are greatly improved.
The wet hoop winding method is to wet the continuous filament, and then directly wind the continuous filament onto the inflatable mandrel 200 under tension control. Compared with dry winding, the cost of wet winding is 40% lower than that of dry winding, and redundant resin glue solution extrudes bubbles and fills gaps due to winding tension, so that the product subjected to wet winding has good air tightness, and the abrasion of continuous long fibers can be reduced by the resin glue solution on the continuous long fibers in the process of wet winding; after the wet winding is completed, the resin glue solution on the continuous long fiber can enable the first structural layer 1 and the second structural layer 2 to form an integrated structure under high-temperature curing.
The specific structure of the composite wrapped tube 100 and the inflatable mandrel 200 in accordance with the embodiments of the present invention is described below with reference to the drawings. The embodiments of the present invention may be all the embodiments of the combination of the foregoing technical solutions, but are not limited to the following specific embodiments, which fall within the scope of the present invention.
Example 1
A composite wrapped tube 100, as shown in fig. 1, comprising: a first structural layer 1, a second structural layer 2 and a shear key 3.
Wherein, as shown in fig. 1, the second structural layer 2 is connected outside the first structural layer 1.
As shown in fig. 1 and 2, the shear key 3 includes a fitting portion 31 and a fixing portion 32, the fitting portion 31 is connected between the first structural layer 1 and the second structural layer 2, one end of the fixing portion 32 is connected to the fitting portion 31, and the other end of the fixing portion 32 extends from the first structural layer 1 toward a direction away from the second structural layer 2.
Example 2
Unlike example 1, the composite wound pipe 100 is a cylindrical pipe as shown in fig. 1, and includes: a first structural layer 1, a second structural layer 2 and a shear key 3.
Wherein, as shown in fig. 1, the second structural layer 2 is connected outside the first structural layer 1.
As shown in fig. 1 and 2, the shear key 3 includes a plurality of shear keys 3 arranged on the first structural layer 1 at intervals, the shear key 3 includes a fitting portion 31 and a fixing portion 32, the fitting portion 31 is a sheet with curvature, and the fitting portion 31 is connected between the first structural layer 1 and the second structural layer 2; the fixing portion 32 is bar-shaped, one end of the fixing portion 32 is connected with the matching portion 31, the other end of the fixing portion 32 extends out of the first structural layer 1 towards a direction away from the second structural layer 2, two opposite side surfaces of the matching portion 31 are respectively attached to the first structural layer 1 and the second structural layer 2, and the fixing portions 32 are arranged in a matrix form on the first structural layer 1.
Example 3
An inflatable mandrel 200, as shown in fig. 4, includes: a balloon 210 and a fixing post 220.
As shown in fig. 4, the fixing columns 220 are disposed on two opposite sides of the air bag 210, the air bag 210 is provided with inflatable valves 2101, the air bag 210 is cylindrical in shape and forms an inflatable cavity therein, the surface of the air bag 210 is recessed toward the inflatable cavity to form a plurality of fixing grooves 2102, and the fixing portions 32 of the composite material winding pipe 100 of embodiment 2 can be positioned in the fixing grooves 2102.
Example 4
A method of processing a composite wrapped tube 100, the composite wrapped tube 100 of example 2 being processed using the inflatable mandrel 200 of example 3, comprising the steps of:
Step S1, inflating the inflatable core mould 200, wherein the inflatable core mould 200 is fixedly arranged on a winding machine.
Step S2, winding continuous filament onto the inflatable mandrel 200 by a wet hoop winding method to form an uncured first structural layer 1 (refer to fig. 6).
In step S3, a plurality of shear keys 3 are placed at intervals on the outer peripheral surface of the uncured first structural layer 1 (refer to fig. 7), and the engaging portion 31 is located on the outer peripheral surface of the uncured first structural layer 1, and one end of the fixing portion 32 is engaged in the fixing groove 2102.
Step S4, winding continuous long fibers around the mating portion 31 and the outer peripheral surface of the uncured first structural layer 1 by a wet circumferential winding method to form an uncured second structural layer 2 (refer to fig. 8), and positioning the mating portion 31 between the uncured first structural layer 1 and the second structural layer 2.
And S5, removing the inflatable mandrel 200 from the winding machine.
Step S6, the uncured first structural layer 1 and the uncured second structural layer 2 are cured at a high temperature.
And S7, exhausting the inflatable mandrel 200, separating the inflatable mandrel 200 from the first structural layer 1 and the matching part 31, and forming the composite material winding pipe 100 by the cured first structural layer 1, the cured second structural layer 2 and the shear key 3.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; it may be a mechanical connection that is made, or may be an electrical connection. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Other constructions of the composite wrapped tube 100, the inflatable mandrel 200, and the method of processing the composite wrapped tube 100, such as the structure and operation of a wrapping machine, according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A composite wrapped tube, comprising:
A first structural layer;
The second structural layer is connected outside the first structural layer;
the shear key comprises a matching part and a fixing part, wherein the matching part is connected between the first structural layer and the second structural layer, one end of the fixing part is connected with the matching part, and the other end of the fixing part extends out of the first structural layer towards a direction away from the second structural layer;
The matching part is a sheet-shaped structure, and the sheet-shaped structure is matched between the first structural layer and the second structural layer;
the first structural layer and the second structural layer are tightly attached together after being cured at high temperature to form an integrated structure.
2. The composite wrapped tube of claim 1, wherein the composite wrapped tube is a cylindrical tube and the mating portion is a sheet with curvature, opposite sides of the mating portion being bonded to the first and second structural layers, respectively.
3. The composite wrapped tube of claim 2, wherein the length of the securing portion extending beyond the first structural layer is less than a radius of the composite wrapped tube, the end of the securing portion remote from the mating portion forming an anchored end.
4. The composite wrapped tube according to claim 1, wherein the securing portion is rod-shaped or sheet-shaped.
5. The composite coiled tubing of any of claims 1-4, wherein the shear key comprises a plurality of the shear keys spaced apart on the first structural layer; the plurality of mating portions of at least a portion of the shear key are spaced apart along the length of the first structural layer.
6. The composite coiled tubing according to claim 5, wherein a plurality of the securing portions are arranged in a matrix on the first structural layer; or a plurality of fixing parts are arranged on the first structural layer in a staggered way.
7. The composite coiled tubing of any of claims 1-4, wherein the shear key is at least one of a steel shear key, an FRP shear key, or a plastic shear key.
8. The composite wrapped tube according to any of claims 1-4, wherein the first and second structural layers comprise at least one inorganic fiber wrapped layer and/or at least one organic fiber wrapped layer.
9. The composite wrapped tube of claim 8, further comprising at least one resin layer, at least one of the resin layers being attached to the second structural layer.
10. An inflatable mandrel, wherein the inflatable mandrel is mountable on a winding machine, comprising:
The air bag is provided with an inflatable and deflatable air valve, an inflatable cavity is formed in the air bag, the surface of the air bag is recessed towards the direction of the inflatable cavity to form a fixing groove, and the fixing part in the composite material winding pipe according to any one of claims 1-9 can be positioned in the fixing groove.
11. The processing method of the composite material winding pipe is characterized by comprising the following steps of:
s1, inflating the inflatable core mould by adopting the inflatable core mould according to claim 10, wherein the inflatable core mould is fixedly arranged on a winding machine;
s2, winding continuous long fibers onto the inflatable core mold by adopting a wet circumferential winding method to form an uncured first structural layer;
S3, placing a plurality of shear keys on the outer peripheral surface of the first uncured structural layer at intervals, enabling the matching parts to be located on the outer peripheral surface of the first uncured structural layer, and enabling one end of each fixing part to be matched in each fixing groove;
S4, winding continuous long fibers on the matched part and the outer peripheral surface of the uncured first structural layer by adopting a wet circumferential winding method to form the uncured second structural layer, and enabling the matched part to be positioned between the uncured first structural layer and the uncured second structural layer;
s5, taking the inflatable core die off the winding machine;
S6, performing high-temperature curing on the first uncured structural layer and the second uncured structural layer;
s7, exhausting the inflatable core mould, wherein the inflatable core mould is separated from the first structural layer and the matching part, and the cured first structural layer, the cured second structural layer and the shear key form the composite material winding pipe.
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| CN115139500A (en) * | 2022-06-07 | 2022-10-04 | 北京工业大学 | Fiber reinforced composite material automobile plate spring and preparation method thereof |
| CN114955709B (en) * | 2022-08-01 | 2022-11-01 | 江苏高倍智能装备有限公司 | Rotary clamping structure suitable for core molds made of different materials and gantry winding machine |
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| US9303404B2 (en) * | 2014-07-09 | 2016-04-05 | Lehigh University | Insulated structural panel connector |
| CN107672194A (en) * | 2017-09-08 | 2018-02-09 | 哈尔滨工程大学 | A kind of FRP stirrups with ribbing and preparation method |
| CN208918125U (en) * | 2018-07-19 | 2019-05-31 | 清华大学 | Prefibers plate |
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| CN105904742A (en) * | 2016-04-25 | 2016-08-31 | 大连理工大学 | Winding molding method of all-composite material shells |
| KR102125150B1 (en) * | 2018-12-18 | 2020-06-19 | 재단법인 한국탄소융합기술원 | Concrete Filled Fiber Tube Pile with Hybrid CFRP tube and Manufacturing method for the same |
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