CN112664725A - Glass fiber reinforced plastic sand inclusion pipe and manufacturing method thereof - Google Patents
Glass fiber reinforced plastic sand inclusion pipe and manufacturing method thereof Download PDFInfo
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- CN112664725A CN112664725A CN202011593691.2A CN202011593691A CN112664725A CN 112664725 A CN112664725 A CN 112664725A CN 202011593691 A CN202011593691 A CN 202011593691A CN 112664725 A CN112664725 A CN 112664725A
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Abstract
The invention provides a glass fiber reinforced plastic sand inclusion pipe and a manufacturing method thereof, wherein the glass fiber reinforced plastic sand inclusion pipe comprises a first fiber layer, a sand inclusion layer and a second fiber layer which are sequentially arranged from inside to outside, wherein the first fiber layer and the second fiber layer both comprise glass fibers; wherein a portion of the glass fibers of at least one of the first fiber layer and the second fiber layer extend in an axial direction of the glass fiber reinforced plastic sand inclusion pipe. The glass fiber reinforced plastic sand inclusion pipe provided by the invention has stronger anti-deformation capability along the axial direction.
Description
Technical Field
The invention relates to the technical field of glass fiber reinforced plastic sand inclusion pipes, in particular to a glass fiber reinforced plastic sand inclusion pipe and a manufacturing method thereof.
Background
Glass fiber reinforced plastic sand inclusion pipe (Glass fiber reinforced plastic sand inclusion pipe) is commonly called Glass fiber reinforced plastic sand inclusion pipe (RPM), is a novel flexible nonmetal (resin, fiber, sand and the like) composite material pipeline which takes Glass fiber and products thereof as reinforcing materials, unsaturated polyester resin and the like as matrix materials, quartz sand, calcium carbonate and other inorganic nonmetal materials as fillers, and is commonly used for gravity or pressure conveying systems such as urban water supply, sewage discharge, industrial water treatment, industrial infusion and the like.
The glass fiber reinforced plastic sand inclusion pipe generally comprises an inner liner layer, a fiber layer, a sand inclusion layer and an outer protective layer; the fiber layer comprises glass fiber and resin, and the glass fiber soaked with the resin can be spirally wound on the lining layer along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe, so that the glass fiber reinforced plastic sand inclusion pipe can have deformation resistance along the radial direction and the axial direction.
However, since the glass fiber reinforced plastic sand inclusion pipe has a large length, a situation where one position is raised or depressed relative to the other position due to tension or compression is liable to occur, and the deformation resistance in the axial direction is poor.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a glass fiber reinforced plastic sand inclusion pipe having high deformation resistance in the axial direction, and a method for manufacturing the same.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the first aspect of the embodiment of the invention provides a glass fiber reinforced plastic sand inclusion pipe, which comprises a first fiber layer, a sand inclusion layer and a second fiber layer which are sequentially arranged from inside to outside, wherein the first fiber layer and the second fiber layer both comprise glass fibers; wherein a portion of the glass fibers of at least one of the first fiber layer and the second fiber layer extend in an axial direction of the glass fiber reinforced plastic sand inclusion pipe.
The glass fiber reinforced plastic sand inclusion pipe comprises a plurality of first fiber layers, wherein the number of the first fiber layers is multiple, the plurality of first fiber layers comprise a first circumferential fiber layer and a first axial fiber layer, glass fibers in the first circumferential fiber layer are wound along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe, and the glass fibers in the first axial fiber layer extend along the axial direction of the glass fiber reinforced plastic sand inclusion pipe; and/or the number of the second fiber layers is multiple, the second fiber layers comprise second circumferential fiber layers and second axial fiber layers, the glass fibers in the second circumferential fiber layers are wound along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe, and the glass fibers in the second axial fiber layers extend along the axial direction of the glass fiber reinforced plastic sand inclusion pipe.
The glass fiber reinforced plastic sand inclusion pipe is characterized in that the number of the first fiber layers is the same as that of the second fiber layers; from the sand inclusion layer to the two sides of the sand inclusion layer, the extending direction of the glass fiber in the Nth layer of the first fiber layer is the same as the extending direction of the glass fiber in the Nth layer of the second fiber layer, and N is less than or equal to the number of the first fiber layer.
The glass fiber reinforced plastic sand inclusion pipe as described above, wherein a glass fiber surface mat is wound around each of the first axial fiber layer and the second axial fiber layer.
The glass fiber reinforced plastic sand inclusion pipe as described above, wherein the glass fiber chopped strands are mixed in the sand inclusion layer.
The glass fiber reinforced plastic sand inclusion pipe as described above, wherein the ground glass fiber particles and the resin particles are mixed in the sand inclusion layer.
The glass fiber reinforced plastic sand inclusion pipe is characterized in that the mesh number of the glass fiber particles and the resin particles is 200-500 meshes.
The glass fiber reinforced plastic sand inclusion pipe comprises a first fiber layer, a second fiber layer and a coloring layer, wherein the first fiber layer is arranged on the first fiber layer, the coloring layer is arranged in the first fiber layer, and the color of the coloring layer is used for indicating the strength grade of the glass fiber reinforced plastic sand inclusion pipe.
Compared with the prior art, the glass fiber reinforced plastic sand inclusion pipe provided by the embodiment of the invention has the following advantages: the first fiber layer sand inclusion layer and the second fiber layer are arranged from inside to outside, wherein the first fiber layer and the second fiber layer are both formed by winding glass fibers after being soaked with resin, part of glass fibers of at least one of the first fiber layer and the second fiber layer extend along the axial direction of the glass fiber reinforced plastic sand inclusion pipe, and the rest of the glass fibers can be wound along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe, so that the glass fibers wound along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe can enable the glass fibers to have the anti-deformation capability along the radial direction and the axial direction of the glass fibers, the glass fibers extending along the axial direction of the glass fiber reinforced plastic sand inclusion pipe can enhance the anti-deformation capability along the axial direction, and the anti-deformation capability along the axial direction is further improved.
A second aspect of an embodiment of the present invention provides a method for manufacturing a glass fiber reinforced plastic sand inclusion pipe, including winding an inner liner; forming a first fiber layer outside the lining layer; the premix is pasted outside the first fiber layer to form a sand inclusion layer; forming a second fiber layer outside the sand inclusion layer, wherein a portion of the glass fibers of at least one of the first fiber layer and the second fiber layer extend in an axial direction of the glass fiber reinforced plastic sand inclusion pipe; and winding an outer protective layer outside the second fiber layer and heating and curing.
The manufacturing method as described above, wherein before the premix is attached to the first fiber layer and the sand inclusion layer is formed, the method further comprises: mixing quartz sand, a thickening agent, resin, a curing agent, glass fiber chopped yarn, and ground resin particles and glass fiber particles to prepare the premix.
The manufacturing method as described above, wherein the temperature of the glass fiber reinforced plastic sand inclusion pipe when cured is 60 ℃ to 80 ℃.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions, other technical problems solved by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a glass fiber reinforced plastic sand inclusion pipe provided in an embodiment of the present invention;
fig. 2 is a flowchart of a method for manufacturing a glass fiber reinforced plastic sand inclusion pipe according to an embodiment of the present invention.
Reference numerals:
10: an inner liner layer;
20: a first fibrous layer; 21: a first circumferential fiber layer; 22: a first axial fiber layer;
30: a sand inclusion layer;
40: a second fibrous layer; 41: a second layer of hoop fibers; 42: a second axial fiber layer;
50: an outer protective layer;
x: axial direction; y: and (4) circumferential direction.
Detailed Description
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The glass fiber reinforced plastic sand inclusion pipe is commonly used in the delivery systems of urban water supply, sewage discharge, industrial water treatment, industrial transfusion and the like. Taking the example of burying the glass fiber reinforced plastic sand inclusion pipe underground, when soil at a certain position in the foundation becomes soft, the supporting force at the position becomes small, and the glass fiber reinforced plastic sand inclusion pipe corresponding to the position may sink along with the foundation at the position, causing deformation of the glass fiber reinforced plastic sand inclusion pipe. When the bending strength of the glass fiber reinforced plastic sand inclusion pipe is low, the larger the sinking amplitude of the glass fiber reinforced plastic sand inclusion pipe corresponding to the foundation is, the hidden troubles of breakage and the like of the glass fiber reinforced plastic sand inclusion pipe can be caused.
In view of the above, the embodiments of the present application provide a glass fiber reinforced plastic sand inclusion pipe with high bending strength, in which the fiber layer is provided with glass fibers partially extending along its own axial direction, so that the pipe has small deviation along the radial direction, high bending strength, and strong deformation resistance along the axial direction.
Fig. 1 is a schematic structural diagram of a glass fiber reinforced plastic sand inclusion pipe provided in an embodiment of the present invention. Referring to fig. 1, an embodiment of the present application provides a glass fiber reinforced plastic sand inclusion pipe, which includes a first fiber layer 20, a sand inclusion layer 30, and a second fiber layer 40 sequentially disposed from inside to outside, where the first fiber layer 20 and the second fiber layer 40 both include glass fibers; wherein part of the glass fibers of at least one of the first fiber layer 20 and the second fiber layer 40 extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe.
The inner liner layer 10 is wrapped by a first fiber layer 20, the first fiber layer 20 is composed of glass fibers and resin, wherein the glass fibers can be soaked in the resin, so that the resin can be fully filled in gaps among the glass fibers, and bubbles and the like in the gaps among the glass fibers are avoided.
The resin material may be wear-resistant resin such as vinyl ester resin, for example, one or more of unsaturated polyester resin, bisphenol a resin, ethylene polyester resin, epoxy resin, and the like, and different resins may be selected according to the use environment.
Furthermore, the resin needs to meet the standards of the long term Hydrostatic Pressure (HDB) test, which is well known to those skilled in the art, and the present embodiment is not limited thereto.
The first fiber layer 20 is wrapped by a sand inclusion layer 30, and the sand inclusion layer 30 is made of quartz sand, resin and a curing agent. Wherein, before the sand inclusion layer 30 is wound, quartz sand, resin and curing agent may be mixed in advance to form a premix, and then the premix is wound outside the first fiber layer 20 through a sand-containing cloth.
The quartz sand can be natural quartz sand, so that the surface of quartz sand particles is smooth after long-term washing by water, cracks cannot be formed in the quartz sand particles, and the compression strength is high. The quartz sand particles may be less than 2mm in size.
The resin may be the same as the resin used for the inner liner 10, and the description of this embodiment is omitted.
Curing agents are also known as hardeners, curing agents or setting agents, wherein the curing of the resin is accomplished by the addition of curing agents, which need to undergo chemical reactions such as condensation, ring closure, addition or catalysis, otherwise the resin is not curable. The curing agent may be an aliphatic amine-based curing agent, an aromatic amine-based curing agent, etc., which are well known to those skilled in the art.
Furthermore, a thickening agent, which is also called a gelling agent, may be mixed in the sand inclusion layer 30, and may be used to increase the viscosity of the resin or the premix, so that the quartz sand particles in the resin are in a suspended state, and the phenomenon of layering of larger quartz sand particles and smaller quartz sand particles does not occur. Specifically, the quartz sand particles can be classified into different grades such as large, medium, small and fine according to their sizes, and when the thickening agent is not used, the quartz sand particles with different sizes such as large, medium, small and fine may be layered, so that the quartz sand is not uniformly mixed.
After the thickening agent is used, the quartz sand particles with different sizes, such as large, medium, small and fine, can be uniformly mixed and compact. Therefore, on the section of the glass fiber reinforced plastic sand inclusion pipe, quartz sand at any position on the sand inclusion layer 30 is uniformly and compactly mixed, and the problems of air bubbles and the like are avoided. The thickener may be an inorganic thickener, a cellulose-based thickener, etc., which are well known to those skilled in the art.
In some alternative embodiments, chopped strands of glass fibers are mixed within the sand inclusion layer 30. The chopped glass fiber yarn may be cut from glass fiber and may have a length of 50mm to 120 mm. When the premix is prepared, the glass fiber chopped yarns are added and uniformly mixed, so that when the sand inclusion layer 30 is wound, the glass fiber chopped yarns are arranged in a disordered manner, the sand inclusion layer is prevented from being broken, the tensile strength and the bending strength of the sand inclusion layer 30 can be improved, and the bending rigidity and the horizontal bending performance of the glass fiber reinforced plastic sand inclusion pipe are improved.
It can be understood that, in the process of manufacturing the glass fiber reinforced plastic sand inclusion pipe, the length of the fiber layer is greater than the nominal length of the glass fiber reinforced plastic sand inclusion pipe, so that after the glass fiber reinforced plastic sand inclusion pipe is manufactured, the redundant fiber layer needs to be trimmed and removed.
The trimmed and removed excess fiber layer includes cured glass fiber and resin, and in order to reduce waste disposal cost, the trimmed and removed fiber layer may be pulverized, and the pulverized glass fiber particles and resin particles may be mixed into the premix. That is, the glass fiber particles and the resin particles after being ground can be mixed in the sand inclusion layer 30, and the glass fiber particles and the resin particles can be uniformly mixed with the quartz sand particles, so that the compactness of the premix is increased, the shrinkage rate of the sand inclusion layer 30 is reduced, and the bending rigidity and the horizontal flexibility of the sand inclusion layer 30 are further increased.
Wherein, the size of the glass fiber particles and the resin particles can be 200 meshes-500 meshes, and optionally, the size of the glass fiber particles and the resin particles can be 300 meshes.
Further, the second fiber layer 40 is similar to the first fiber layer 20 and also includes glass fibers and resin, and the forming manner thereof is similar to the first fiber layer 20, and the description thereof is omitted.
The outer protection layer 50 is wound outside the second fiber layer 40 to prevent corrosion of soil and environmental medium, and the material and forming manner thereof may be similar to those of the inner liner layer 10, and are not described in detail in this embodiment.
In some alternative embodiments, a portion of the glass fibers may be helically wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, such that the glass fiber reinforced plastic sand inclusion pipe has both hoop stiffness and axial bending stiffness. Meanwhile, the rest part of the glass fiber can extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe, and the part of the glass fiber is distributed along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, so that the bending rigidity and the horizontal deflection performance of the glass fiber reinforced plastic sand inclusion pipe along the axial direction X can be obviously improved.
It is understood that the glass fibers extending in the axial direction X may be disposed at the first fiber layer 20 or the second fiber layer 40, and the glass fibers extending in the axial direction X may be disposed at both the first fiber layer 20 and the second fiber layer 40.
In some optional embodiments, the number of the first fiber layers 20 is multiple, the multiple first fiber layers 20 include a first circumferential fiber layer 21 and a first axial fiber layer 22, the glass fibers in the first circumferential fiber layer 21 are wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, and the glass fibers in the first axial fiber layer 22 extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe; and/or the number of the second fiber layers 40 is multiple, the multiple second fiber layers 40 include a second circumferential fiber layer 41 and a second axial fiber layer 42, the glass fibers in the second circumferential fiber layer 41 are wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, and the glass fibers in the second axial fiber layer 42 extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe.
That is, a part of the glass fibers in the first fiber layer 20 is spirally wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, and the rest of the glass fibers extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe; meanwhile, part of the glass fibers in the second fiber layer 40 are spirally wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, and the rest of the glass fibers extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe.
Thus, the amount of glass fibers extending in the axial direction X of the glass fiber reinforced plastic sand inclusion pipe is increased, and the bending rigidity and horizontal deflection performance of the glass fiber reinforced plastic sand inclusion pipe can be further improved. And the glass fiber content of the glass fiber reinforced plastic sand inclusion pipe is higher, and the circumferential rigidity and the axial rigidity of the glass fiber reinforced plastic sand inclusion pipe are both higher.
In the case of an axial fiber layer, it may be formed by laying several glass fibers along the circumferential direction Y, wherein each glass fiber extends along the axial direction X, and it may also be a unidirectional cloth known to those skilled in the art.
It will be appreciated that for the first fiber layer 20, the first axial fiber layer 22 may be disposed on a side adjacent to the sand inclusion layer 30, and may also be disposed on a side adjacent to the inner liner layer 10. Meanwhile, for the second fiber layer 40, the second axial fiber layer 42 may be disposed on a side close to the sand inclusion layer 30, or may be disposed on a side close to the outer protection layer 50, and the relative positions of the first circumferential fiber layer 21, the first axial fiber layer 22, the second circumferential fiber layer 41, and the second axial fiber layer 42 are not limited in this embodiment, based on the stress condition of the glass fiber reinforced plastic sand inclusion pipe.
Further, the number of the first fiber layers 20 and the number of the second fiber layers 40 may be the same or different. In some alternative embodiments, the number of layers of the first fiber layer 20 is the same as the number of layers of the second fiber layer 40; from the sand inclusion layer 30 to the two sides of the sand inclusion layer 30, the extending direction of the glass fiber in the Nth first fiber layer 20 is the same as the extending direction of the glass fiber in the Nth second fiber layer 40, and N is less than or equal to the number of the first fiber layers 20.
That is, when a slit is cut on the plane of the axis of the glass fiber reinforced plastic sand inclusion pipe and the glass fiber reinforced plastic sand inclusion pipe is unfolded from the slit to have a flat structure, the fiber layer and the second fiber layer 40 are symmetrically arranged on both sides of the sand inclusion layer 30, and the bending rigidity and horizontal deflection performance of the glass fiber reinforced plastic sand inclusion pipe can be further improved.
Take first fibrous layer 20 to include one deck first axial fibrous layer 22 and two-layer first hoop fibrous layer 21 as an example, this moment, first hoop fibrous layer 21, first axial fibrous layer 22 and first hoop fibrous layer 21 can be twined in proper order outward to inner liner 10, that is inner liner 10 and sand inclusion layer 30 contact with first hoop fibrous layer 21 respectively, set up first axial fibrous layer 22 between two first hoop fibrous layers 21.
Correspondingly, the second fiber layer 40 also includes a second axial fiber layer 42 and two second circumferential fiber layers 41, the sand inclusion layer 30 and the outer protective layer 50 are both in contact with the second circumferential fiber layers 41, and the second axial fiber layer 42 is disposed between the two second circumferential fiber layers 41.
Of course, the number of the first hoop fiber layer 21, the first axial fiber layer 22, and the second hoop fiber layer 41, the second axial fiber layer 42 is not limited in this embodiment.
It is understood that the single glass fiber can be regarded as a long and thin rod-shaped structure with large length and small diameter, so that when the single glass fiber is contacted with other structure layers, the contact position can be understood as a line, and the contact area is small. Correspondingly, in this embodiment, glass fiber surfacing mat has all been twined outward to every layer of first axial fibrous layer 22 and every layer of second axial fibrous layer 42, and glass fiber surfacing mat can pass through the resin winding in the axial fibrous layer outside, and glass fiber surfacing mat is sheet structure, and it can be attached on glass fiber's surface, and area of contact grow, and joint strength is high, and glass fiber surfacing mat also can twine axial fibrous layer fastening simultaneously, avoids appearing the bubble in the resin.
In some optional embodiments, the glass fiber reinforced plastic sand inclusion pipe further comprises an inner liner layer 10 and a coloring layer, wherein the inner liner layer 10 is arranged in the first fiber layer 20, the coloring layer is arranged in the inner liner layer 10, and the color of the coloring layer is used for indicating the strength grade of the glass fiber reinforced plastic sand inclusion pipe.
The lining layer 10 can be in direct contact with a fluid to be conveyed, and has the functions of corrosion resistance, abrasion resistance, leakage resistance and the like.
The inner liner 10 comprises a resin into which one or more of a glass fiber surfacing mat, a chopped strand mat, a knitted composite mat, a mesh fabric, and the like may be mixed. The kind of resin has been described in the above embodiments, and the description of the embodiments is omitted. Glass fiber surfacing mats, chopped strand mats, knitted composite mats, and meshes may be of the kind and construction well known to those skilled in the art.
The glass fiber reinforced plastic sand inclusion pipe may further include a coloring layer disposed in the inner liner layer 10, the inner liner layer 10 being disposed in the first fiber layer 20, and the coloring layer may have different colors, such as yellow, red, green, etc.
Wherein different colors may represent different performance levels, for example, yellow may represent a higher abrasion resistance level of the glass fiber reinforced plastic sand inclusion pipe, and green may represent a lower abrasion resistance level of the glass fiber reinforced plastic sand inclusion pipe. Of course, the color may also be used to indicate the stiffness grade of the glass fiber reinforced plastic sand inclusion pipe, etc., and the embodiment is not limited.
Furthermore, multiple colors can be arranged in the same pipe to indicate different strength grades of the glass fiber reinforced plastic sand inclusion pipe.
Furthermore, the coloring layer may be made of resin, and the coloring layer may also protect the inner liner layer 10 to prevent the inner liner layer 10 from being worn and corroded.
Fig. 2 is a flowchart of a method for manufacturing a glass fiber reinforced plastic sand inclusion pipe according to an embodiment of the present invention. Referring to fig. 2, an embodiment of the present application further provides a method for manufacturing a glass fiber reinforced plastic sand inclusion pipe, which includes:
s100, winding the lining layer 10. Wherein, before winding the inner liner 10, a protective film which is easy to be demolded may be wound on a winding roll, and then the inner liner 10 may be wound on the protective film.
S200, forming a first fiber layer 20 outside the lining layer 10. Before winding the first fiber layer 20, the glass fibers in the first fiber layer 20 may be soaked in resin, for example, the glass fibers may be passed through a resin box, so that the glass fibers can be sufficiently soaked, and then the first fiber layer 20 is wound outside the inner liner layer 10 to form the first fiber layer 20.
S300, pasting the premix outside the first fiber layer 20 to form a sand inclusion layer 30. The premix is prepared by mixing quartz sand, resin and a curing agent, and is spirally wound outside the first fiber layer 20 through a gauze bag to form a sand inclusion layer 30, wherein the sand inclusion layer 30 can be wound by one or more layers.
And S400, forming a second fiber layer 40 outside the sand inclusion layer 30, wherein part of the glass fibers of at least one of the first fiber layer 20 and the second fiber layer 40 extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe. The winding process of the second fiber layer 40 is similar to the winding process of the first fiber layer 20, and the description of this embodiment is omitted.
Because part of the glass fibers in either or both of the first fiber layer 20 and the second fiber layer 40 extend along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe, and the rest of the glass fibers can be wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe, the glass fibers wound along the circumferential direction Y of the glass fiber reinforced plastic sand inclusion pipe can enable the glass fibers to have the deformation resistance along the radial direction and the axial direction X of the glass fibers, and the glass fibers extending along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe can enhance the bending rigidity of the glass fibers, and the deformation resistance along the axial direction X of the glass fiber reinforced plastic sand inclusion pipe is high.
And S500, winding the outer protection layer 50 outside the second fiber layer 40 and heating and curing. The glass fiber reinforced plastic sand inclusion pipe can be cured in an oven, in some optional embodiments, the temperature of the glass fiber reinforced plastic sand inclusion pipe during curing is 60-80 ℃, the curing temperature is high, the curing time is shortened, and meanwhile, waste gas can be extracted from the oven and processed in a centralized manner, so that the environment pollution caused by the waste gas is avoided.
After the solidification is finished, the glass fiber reinforced plastic sand inclusion pipe can be demoulded and trimmed, for example, redundant fiber layers are trimmed and removed, meanwhile, the trimmed and removed fiber layers can be crushed and then put into a premix mixing stage again, and the material utilization rate is high.
In some alternative embodiments, before the premix is applied to the outside of the first fiber layer 20 and the sand inclusion layer 30 is formed, the method further comprises:
s001, mixing quartz sand, a thickening agent, resin, a curing agent, glass fiber chopped yarns, ground resin particles and glass fiber particles to prepare a premix.
Specifically, the premix may further contain a thickener, chopped glass fiber yarn, ground resin particles, and glass fiber particles.
The types and functions of the thickener, the chopped glass fiber yarn, the resin particles and the glass fiber particles are described in the above embodiments, and the description of the embodiments is omitted.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The glass fiber reinforced plastic sand inclusion pipe is characterized by comprising a first fiber layer, a sand inclusion layer and a second fiber layer which are sequentially arranged from inside to outside, wherein the first fiber layer and the second fiber layer both comprise glass fibers;
wherein a portion of the glass fibers of at least one of the first fiber layer and the second fiber layer extend in an axial direction of the glass fiber reinforced plastic sand inclusion pipe.
2. The glass fiber reinforced plastic sand inclusion pipe according to claim 1,
the number of the first fiber layers is multiple, the multiple first fiber layers comprise a first circumferential fiber layer and a first axial fiber layer, the glass fibers in the first circumferential fiber layer are wound along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe, and the glass fibers in the first axial fiber layer extend along the axial direction of the glass fiber reinforced plastic sand inclusion pipe; and/or the presence of a gas in the gas,
the number of layers of the second fiber layers is multiple, the second fiber layers comprise second circumferential fiber layers and second axial fiber layers, glass fibers in the second circumferential fiber layers are wound along the circumferential direction of the glass fiber reinforced plastic sand inclusion pipe, and the glass fibers in the second axial fiber layers extend along the axial direction of the glass fiber reinforced plastic sand inclusion pipe.
3. The glass-fiber reinforced plastic sand inclusion pipe according to claim 2, wherein the number of layers of the first fiber layer is the same as the number of layers of the second fiber layer;
from the sand inclusion layer to the two sides of the sand inclusion layer, the extending direction of the glass fiber in the Nth layer of the first fiber layer is the same as the extending direction of the glass fiber in the Nth layer of the second fiber layer, and N is less than or equal to the number of the first fiber layer.
4. The glass-fiber reinforced plastic sand inclusion pipe of claim 1 wherein each of the first axial fiber layers and each of the second axial fiber layers is wrapped with a glass fiber surfacing mat.
5. The glass fiber reinforced plastic sand inclusion pipe according to claim 1, wherein glass fiber chopped strands are mixed in the sand inclusion layer.
6. The glass fiber reinforced plastic sand inclusion pipe according to claim 1, wherein ground glass fiber particles and resin particles are mixed in the sand inclusion layer.
7. The glass fiber reinforced plastic sand inclusion pipe of claim 1, further comprising an inner liner layer disposed within the first fiber layer and a colored layer disposed within the inner liner layer, wherein the color of the colored layer is used to indicate the strength level of the glass fiber reinforced plastic sand inclusion pipe.
8. A method for manufacturing a glass fiber reinforced plastic sand inclusion pipe is characterized by comprising the following steps:
winding the lining layer;
forming a first fiber layer outside the lining layer;
the premix is pasted outside the first fiber layer to form a sand inclusion layer;
forming a second fiber layer outside the sand inclusion layer, wherein a portion of the glass fibers of at least one of the first fiber layer and the second fiber layer extend in an axial direction of the glass fiber reinforced plastic sand inclusion pipe;
and winding an outer protective layer outside the second fiber layer and heating and curing.
9. The method of claim 8, further comprising, before applying the premix to the first fiber layer and forming the sand inclusion layer:
mixing quartz sand, a thickening agent, resin, a curing agent, glass fiber chopped yarn, and ground resin particles and glass fiber particles to prepare the premix.
10. The manufacturing method according to claim 8, wherein the temperature of the glass fiber reinforced plastic sand inclusion pipe during curing is 60-80 ℃.
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| CN202011593691.2A CN112664725A (en) | 2020-12-29 | 2020-12-29 | Glass fiber reinforced plastic sand inclusion pipe and manufacturing method thereof |
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| CN202011593691.2A CN112664725A (en) | 2020-12-29 | 2020-12-29 | Glass fiber reinforced plastic sand inclusion pipe and manufacturing method thereof |
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Application publication date: 20210416 |