Composite material insertion rod for mariculture of laver

Abstract

The utility model provides a composite material insert rod for mariculture of laver, which comprises two layers of fiber felts, one layer of fiber felt is positioned on the inner wall of the insert rod, the other layer of fiber felt is positioned on the outer wall of the insert rod, an accommodating space is formed between the two layers of fiber felts, fiber tows are uniformly distributed in the accommodating space along the axial direction of the insert rod, and the fiber tows are uniformly distributed on the inner wall of the insert rod. Thermoplastic resin material layers are arranged on the surfaces of the fiber tows, the surfaces of the fiber felts and in the containing space. According to the utility model, the thermoplastic resin material is adopted to replace the original thermosetting resin material for filling, the thermoplastic resin material is very good in toughness, the elongation at break is generally greater than 20%, and the number of required fiber felt layers is reduced under the condition that the bending strength of the insertion rod is ensured, so that the felt guide device is simplified, the felt guide process difficulty is greatly reduced, and the production cost is reduced. And meanwhile, the resin injection pressure is reduced, and the equipment investment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of composite materials, in particular to a composite material inserting rod used for marine laver cultivation. Background Art

[0002] Pole farming of laver refers to a farming method in which net curtains are hung on poles inserted deep into the sea, and the net curtains rise and fall with the rise and fall of the tide. The poles are an important tool for pole farming of laver, serving to fix the laver farming net curtains, thereby providing and fixing the laver's growth space and helping farmers to easily separate the laver from the seawater during harvesting. In the past, bamboo poles were mainly used for poles, but bamboo poles are easily worn out and have a short service life, making them very likely to become marine debris. Frequent replacement of bamboo poles requires a lot of manpower and material resources, which increases the cost of laver farming. At the same time, due to the limited length of bamboo poles, laver can only be cultivated in shallow waters near the coast, which limits the farming area and the quality of the laver.

[0003] Composite materials have the advantages of light weight, high strength, corrosion resistance, fatigue resistance, and structural design. The composite material rods made of them have the advantages of high strength, wind and wave resistance, corrosion resistance, aging resistance, high and low temperature resistance, and long service life. At the same time, composite materials can be used to make longer rods, thereby realizing the cultivation of laver in the deep sea, expanding the area of laver cultivation, and improving the quality of laver.

[0004] At present, composite material plug rods are all made of thermosetting composite materials. Since the material is relatively brittle, thermosetting resins such as unsaturated polyester resin, vinyl resin and epoxy resin are commonly used. The elongation at break of the resin is generally 2%-8%. When making composite material plug rods, it is necessary to add three or more layers of fiber felt when arranging the fiber tows. These three layers of fiber felt are located inside, on the outer surface and in the middle of the plug rod to avoid thermal stress cracking during curing of the composite material plug rod and internal stress cracking during use. However, the more felt layers are added, the more complex the fiber felt guide device is, the more difficult the process is, and the fiber felt is prone to distortion, which affects the performance of the final plug rod. At the same time, the more felt layers are added, the greater the pressure when pouring the thermosetting resin material, requiring a higher pressure injection pump and a pipe with a higher pressure bearing capacity, which increases the equipment investment cost. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the purpose of the present utility model is to provide a composite material plug rod for marine aquaculture of laver, which solves the problem in the existing technology that when using thermosetting composite materials to make plug rods, three or even more layers of fiber felt need to be added when arranging the fiber bundles, thereby resulting in complex felt guide devices, increased process difficulty, and easy distortion and deformation of the fiber felt.

[0006] To achieve the above object, the present utility model provides the following technical solution: A composite plug for cultivating laver in the ocean, comprising two layers of fiber felts, one layer of fiber felt is located on the inner wall of the plug, and the other layer of fiber felt is located on the outer wall of the plug. An accommodation space is formed between the two layers of fiber felts. Fiber filaments are uniformly arranged along the axial direction of the plug in the accommodation space. A thermoplastic resin material layer is provided on the surface of the fiber filaments, the surface of the fiber felts, and in the accommodation space.

[0007] As a further improvement of the above technical solution:

[0008] The thermoplastic resin material layer is a synthetic polyamide material.

[0009] The thermoplastic resin material layer is formed by pouring the synthetic polyamide material on the surface of the fiber filaments, the surface of the fiber felts, and in the accommodation space, and curing through a heating reaction.

[0010] The outer diameter of the plug is 75 - 80 mm, and the wall thickness of the plug is 5 - 8 mm.

[0011] The sum of the volumes of the fiber filaments and the fiber felts accounts for 50% - 65% of the total volume of the plug.

[0012] The fiber felt is a 90° unidirectional woven fabric with a specification of 200 g / m 2 -600 g / m 2 .

[0013] The bending strength of the plug is 750 - 820 MPa.

[0014] Compared with the prior art, the above technical solution brings the following technical effects:

[0015] The present utility model designs two layers of inner and outer fiber felts, and fiber filaments are arranged between the two layers of fiber felts. By filling the thermoplastic resin material between the fiber filaments, the thermoplastic resin material is cured by heating to form a new composite plug. Since the thermoplastic resin material is used to replace the original thermosetting resin material for filling, the thermoplastic resin material has very good toughness, and the elongation at break is generally greater than 20%. While ensuring the bending strength of the plug, the number of fiber felt layers required is reduced, thereby simplifying the felt guiding device, greatly reducing the difficulty of the felt guiding process, avoiding the twisting and deformation of the fiber felt, and at the same time reducing the resin injection pressure and the equipment investment cost. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of a composite material insertion rod in the prior art;

[0018] Figure 2 is a schematic structural diagram of the composite material insertion rod of the present utility model;

[0019] Main element symbol description:

[0020] 1. Fiber felt; 2. Accommodating space; 3. Fiber tow; 4. Thermoplastic resin material layer. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0024] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on the top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under the bottom of" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0026] As Figure 1 shown in the figure, the figure shows an existing plug rod. In order to avoid thermal stress cracking during the curing and forming of the composite material plug rod and internal stress cracking under the working conditions, in addition to arranging fiber bundles 3 inside the plug rod, a certain amount of fiber felt 1 also needs to be added. For thermosetting resins, since the material is relatively brittle, fiber felt 1 needs to be added at three places, namely the inside, the outer surface and the middle part of the composite material plug rod. The fiber arrangement from the outside to the inside is: fiber felt 1 / fiber bundle 3 / fiber felt 1 / fiber bundle 3 / fiber felt 1. The more the number of layers of fiber felt 1, the more complex the manufacturing process of the plug rod. The following embodiments are the specific solutions of the present invention:

[0027] As Figure 2 shown in the figure, the composite material plug rod for cultivating laver in marine aquaculture in this embodiment includes two layers of fiber felt 1. One layer of fiber felt 1 is located on the inner wall of the plug rod, and the other layer of fiber felt 1 is located on the outer wall of the plug rod. A receiving space 2 is formed between the two layers of fiber felt 1. Fiber bundles 3 are evenly arranged along the axial direction of the plug rod in the receiving space 2. A thermoplastic resin material layer 4 is provided on the surface of the fiber bundles 3, on the surface of the fiber felt 1 and in the receiving space 2.

[0028] In this embodiment, the thermoplastic resin material layer 4 is a synthetic polyamide material.

[0029] Specifically, the thermoplastic resin material layer 4 is made of caprolactam, an initiator and an activator.

[0030] Polyamide (nylon) belongs to thermoplastic resin, which has good toughness. After being compounded with fibers, the risk of cracking is reduced. For the formed composite insert rod, it is only necessary to add fiber felts at two places, namely the inner surface and the outer surface of the insert rod. The fiber arrangement from the outside to the inside is: fiber felt 1 / fiber tow 3 / fiber felt 1. In this embodiment, a thermoplastic resin material is used to replace the original thermosetting resin material for filling. The thermoplastic resin material has very good toughness, and its elongation at break is generally greater than 20%. When ensuring the bending strength of the insert rod, the number of fiber felt layers required is reduced, thus simplifying the felt guiding device, greatly reducing the difficulty of the felt guiding process, avoiding the distortion and deformation of the fiber felt, and at the same time reducing the resin injection pressure and the equipment investment cost.

[0031] In this embodiment, the thermoplastic resin material layer 4 is formed by pouring a synthetic polyamide material on the surface of the fiber tow 3, the surface of the fiber felt 1, and the accommodation space 2 and curing through a heating reaction. The specific pouring position and method of the synthetic thermoplastic resin raw material are the same as those of the existing pouring of thermosetting resin raw materials. In this embodiment, the thermosetting resin raw material is replaced with a synthetic thermoplastic resin raw material. The pouring process of the synthetic thermoplastic resin raw material is as follows: arrange the fiber felt 1 and the fiber tow 3 and put them into the mold. The mold includes an outer mold and a core mold. Inject the synthetic thermoplastic resin raw material through the holes on the mold. The raw material infiltrates the whole fiber and cures, and then is transferred out of the mold.

[0032] In this embodiment, the outer diameter of the insert rod is 75 - 80 mm, and the wall thickness of the insert rod is 5 - 8 mm.

[0033] In this embodiment, the sum of the volumes of the fiber tow 3 and the fiber felt 1 accounts for 50% - 65% of the total volume of the insert rod.

[0034] In this embodiment, the fiber tow 3 and the fiber felt 1 are one or several of glass fiber, carbon fiber, aramid fiber, and basalt fiber. If the fiber tow 3 and the fiber felt 1 are made of glass fiber, the best option is to use E-glass fiber.

[0035] In this embodiment, the fiber felt 1 is a 90° unidirectional woven fabric with a specification of 200 g / m 2 - 600 g / m 2 。

[0036] In this embodiment, the bending strength of the insert rod is 750 - 820 MPa.

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Example 1:

[0039] The outer diameter of the composite material insert rod is 76 mm, the thickness is 6.5 mm. The fiber tow 3 and the fiber mat 1 are made of E-glass fiber, the thermoplastic resin material is caprolactam (nylon), the fiber volume content is 50%, and the arrangement of the glass fiber. As Figure 2 shown, from the outside to the inside are the glass fiber mat 1, the glass fiber tow 3, the glass fiber mat 1. The glass fiber mat 1 is a 90° unidirectional woven fabric, and the specifications of the inner and outer glass fiber mats 1 are both 550 g / m 2 , after arranging the fiber tow 3 and the fiber mat 1, injecting caprolactam, initiator and activator from the mold injection port, the glass fiber is infiltrated with resin and then heated and cured to form a composite material insert rod. According to the standard GB / T 31539-2015, the flexural strength of the product is 750 MPa. As the comparative sample of this example, the dimensions, fiber type and fiber volume content of the thermosetting composite material insert rod are the same as above. The resin matrix uses unsaturated polyester resin. The arrangement of the glass fiber from the outside to the inside is the glass fiber mat 1, the glass fiber tow 3, the glass fiber mat 1, the glass fiber tow 3, the glass fiber mat 1, where the glass fiber mat 1 is a 90° unidirectional woven fabric, and the specifications of the inner and outer glass fiber mats 1 are both 350 g / m 2 , and the specifications of the middle glass fiber mat 1 are both 400 g / m 2 , ensuring that the total content of the glass fiber mat 1 in the total glass fiber is the same as above. For the composite material insert rod product made, the measured flexural strength is 720 MPa.

[0040] Example 2:

[0041] The outer diameter of the composite material insert rod is 76 mm, the thickness is 5 mm. The fiber tow 3 and the fiber mat 1 are made of E-glass fiber, the thermoplastic resin material is caprolactam (nylon), the fiber volume content is 60%, and the arrangement of the glass fiber. As Figure 2 shown, from the outside to the inside are the glass fiber mat 1, the glass fiber tow 3, the glass fiber mat 1. The glass fiber mat 1 is a 90° unidirectional woven fabric, and the specifications of the inner and outer glass fiber mats 1 are both 600 g / m 2 , after arranging the fiber tow 3 and the fiber mat 1, injecting caprolactam, initiator and activator from the mold injection port, the glass fiber is infiltrated with resin and then heated and cured to form a composite material insert rod. According to the standard GB / T 31539-2015, the flexural strength of the product is 820 MPa. As the comparative sample 1 of this example, the dimensions, fiber type and fiber volume content of the thermosetting composite material insert rod are the same as above. The resin matrix uses vinyl resin. The arrangement of the glass fiber from the outside to the inside is the glass fiber mat 1, the glass fiber tow 3, the glass fiber mat 1, the glass fiber tow 3, the glass fiber mat 1, where the glass fiber mat 1 is a 90° unidirectional woven fabric, and the specifications of the glass fiber mat 1 are both 400 g / m 2, ensure that the total content of fiberglass mat 1 in the total fiberglass is the same as above. For the fabricated composite material plug rod product, the tested flexural strength is 760 MPa. As the comparative sample 2 of this example, the dimensions, fiber type, and fiber volume content of the thermosetting composite material plug rod are the same as above. The resin matrix uses epoxy resin. The arrangement of the fiberglass from the outside to the inside is fiberglass mat 1, fiberglass tow 3, fiberglass mat 1, fiberglass tow 3, fiberglass mat 1, where the fiberglass mat is a 90° unidirectional woven fabric, and the specification of fiberglass mat 1 is 400 g / m 2 , ensure that the total content of fiberglass mat 1 in the total fiberglass is the same as above. For the fabricated composite material plug rod product, the tested flexural strength is 810 MPa.

[0042] The method for fabricating the composite material plug rod is as follows:

[0043] Arrange the fibers in the order of fiberglass mat 1 / fiberglass tow 3 / fiberglass mat 1, pull the fibers into the mold, inject the synthetic polyamide raw material through the mold injection port. After the raw material infiltrates the fibers, heat and cure them to form a shape, and pull the plug rod out from the mold outlet through the traction device, and perform cutting according to the required length of the plug rod in the later stage.

[0044] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments, as long as they meet the purpose of the present invention, they should be within the scope of protection required by the present invention, such as: different combinations of specific embodiments, different combinations of different distinguishing technical features.

Claims

1. A composite insertion rod for cultivating laver in the ocean, characterized in that, It includes two layers of fiber felts (1), one layer of fiber felt (1) is located on the inner wall of the inserting rod, and the other layer of fiber felt (1) is located on the outer wall of the inserting rod. An accommodation space (2) is formed between the two layers of fiber felts (1). Fiber bundles (3) are uniformly arranged along the axial direction of the inserting rod in the accommodation space (2). A thermoplastic resin material layer (4) is provided on the surface of the fiber bundles (3), on the surface of the fiber felts (1), and in the accommodation space (2).

2. The composite inserting rod for cultivating laver in the ocean according to claim 1, characterized in that The thermoplastic resin material layer (4) is a synthetic polyamide material.

3. The composite material insertion rod for cultivating laver in the ocean according to claim 2, characterized in that, The thermoplastic resin material layer (4) is formed by pouring the synthetic polyamide material on the surface of the fiber bundles (3), on the surface of the fiber felts (1), and in the accommodation space (2), and curing through a heating reaction.

4. The composite inserting rod for cultivating laver in the ocean according to claim 1, wherein, The outer diameter of the inserting rod is 75 - 80 mm, and the wall thickness of the inserting rod is 5 - 8 mm.

5. The composite inserting rod for cultivating laver in the ocean according to claim 1, wherein The sum of the volumes of the fiber bundles (3) and the fiber felts (1) accounts for 50% - 65% of the total volume of the inserting rod.

6. The composite insertion rod for cultivating laver in the ocean according to claim 1, characterized in that, The fiber felt (1) is a 90° uniaxially woven fabric with a specification of 200 g / m 2 - 600 g / m 2 .

7. The composite insertion rod for marine cultivation of laver according to claim 1, characterized in that, The flexural strength of the inserting rod is 750 - 820 MPa.

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