1. A pultrusion method of a large-scale anticorrosion protective cover for an ocean steel structure is characterized in that: the method comprises the following steps:

drawing the fiber and the multiaxial fiber fabric, threading and arranging the fiber and performing gum dipping treatment, and layering and gum dipping treatment on the multiaxial fiber fabric to obtain a gum dipped fiber and a gum dipped multiaxial fiber fabric;

the dipped fiber and the dipped multiaxial fiber fabric enter a mold with a heating function under the action of traction force, and are cured and pultruded to obtain an anti-corrosion protective cover;

wherein the temperature of the inlet end of the die is set to be 90-130 ℃, and the temperature of the outlet end of the die is set to be 115-155 ℃;

the multiaxial fiber fabric is formed by weaving 0-degree directional fibers, 90-degree directional fibers and chopped strand mats, and the single weight of the multiaxial fiber fabric is 890g/m²Wherein the fiber weight in the 0 DEG direction is 160g/m²The single weight of the fiber in the 90-degree direction is 500g/m²The single weight of the chopped strand mat is 230g/m²；

The included angle of the traction direction of the impregnated fiber and the impregnated multiaxial fiber fabric is 0 degree.

2. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 1, wherein: the traction force is 200KN-400KN, and the pultrusion speed is 0.08m/min-0.2 m/min.

3. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 2, wherein: the traction force is 350KN and the speed is 0.2 m/min.

4. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 1, wherein: the fiber is alkali-free glass fiber, and the multiaxial fiber fabric is alkali-free glass fiber.

5. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 1, wherein: the fibers and the axial fiber fabrics are soaked in the resin matrix; the resin matrix comprises, by weight, 100 parts of resin, 0.1-3 parts of a release agent, 10-15 parts of a curing agent and 10-50 parts of a filler.

6. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 5, wherein: the resin is unsaturated polyester resin, the release agent is a solution type internal release agent, and the curing agent is at least one of styrene compounds, peroxides or azo compounds; the filler is at least one of heavy calcium carbonate, aluminum hydroxide and light calcium carbonate.

7. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 6, wherein: the volume ratio of the total volume of the fibers and the multiaxial fiber fabrics after gum dipping to the resin matrix is X: (1-X), wherein X is more than or equal to 0.4 and less than or equal to 0.8.

8. The pultrusion method for the large-sized anticorrosion protection cover for the marine steel structure as claimed in claim 1, wherein: the obtained marine corrosion-resistant protective cover has an inner diameter of 1.0-1.5 m.

9. An anti-corrosive protective cover obtained based on a pultrusion method of a large anti-corrosive protective cover for a marine steel structure as claimed in any one of claims 1 to 8.

10. The large scale erosion shield of claim wherein: comprises a semicircular arc plate (1), wherein two sides of the arc plate (1) are respectively provided with a side plate (2) extending laterally; the inner diameter of the arc-shaped plate (1) is 0.8-1.5m, and the thickness of each side plate (2) is 8-10 mm;

the arc-shaped plate (1) comprises a middle section (101) and side arc-shaped sections (102) which are respectively arranged at two sides of the middle section (101), the thickness of the middle section (101) is 3-5mm, the thickness of the side arc-shaped sections (102) is gradually increased from the middle section to the side plate (2), and the thickness of the side arc-shaped sections is increased to be the same as that of the side plate (2); the included angle between the arc-shaped plate (1) and the side plate (2) is 90-120 degrees.

Background

The wave splash zone is the most serious corrosion zone of the marine steel structure facilities, and the main reason is that in the wave splash zone, the steel surface is periodically wetted by seawater, is in a dry-wet alternative state, is full in oxygen supply, continuously concentrates salt, and causes the most serious corrosion under the synergistic action of sunlight, wind blowing, seawater environment and the like.

Aiming at the protection of a spray splashing area of a marine steel structure facility, a multilayer petrolatum coating anticorrosion technology is mostly used at present, the most important part of the technology is a large marine anticorrosion protection cover prepared by using a composite material on the outer layer, and the technology is mainly used for protecting various anticorrosion materials coated outside a steel structure. In the prior art, the production mode of the anti-corrosion protective cover is hand pasting, the production mode has complex working procedures, low production efficiency, low speed and long production period, and is not suitable for large-batch products.

Therefore, in view of the above problems, it is an urgent need to provide a large corrosion protection cover for marine steel structures and a pultrusion method thereof.

Disclosure of Invention

The invention aims to provide a large-scale anticorrosion protective cover for a marine steel structure and a pultrusion method thereof, and solves the technical problems that the production modes of the anticorrosion protective cover in the prior art are all manual pasting manufacture, the production mode has complex working procedures, low production efficiency, low speed and long production period and is not suitable for large-batch products, in addition, due to different skill levels of operators and the influence of manufacturing environmental conditions, the manual pasting product quality has poor stability, the product performance improvement rate is limited, and long-term development cannot be achieved.

The invention provides a pultrusion method of a large-scale anticorrosion protective cover for a marine steel structure, which comprises the following steps:

drawing the fiber and the multiaxial fiber fabric, threading and arranging the fiber and performing gum dipping treatment, and layering and gum dipping treatment on the multiaxial fiber fabric to obtain a gum dipped fiber and a gum dipped multiaxial fiber fabric;

the dipped fiber and the dipped multiaxial fiber fabric enter a mold with a heating function under the action of traction force, and are cured and pultruded to obtain an anti-corrosion protective cover;

wherein the temperature at the inlet end of the mold is set to be 90-130 ℃, the temperature at the outlet end of the mold is set to be 115-155 ℃,

the multiaxial fiber fabric is formed by weaving 0-degree directional fibers, 90-degree directional fibers and chopped strand mats, and the single weight of the multiaxial fiber fabric is 890g/m²Wherein the fiber weight in the 0 DEG direction is 160g/m²The single weight of the fiber in the 90-degree direction is 500g/m²The single weight of the chopped strand mat is 230g/m²；

The included angle of the traction direction of the impregnated fiber and the impregnated multiaxial fiber fabric is 0 degree.

Preferably, the traction force is 200KN-400KN, and the pultrusion speed is 0.08m/min-0.2 m/min.

Preferably, the tractive effort is 350KN and the speed is 0.2 m/min.

Preferably, the fibers are alkali-free glass fibers and the multiaxial fiber fabric is alkali-free glass fibers.

Preferably, both the fibers and the axial fiber fabric are impregnated in a resin matrix; the resin matrix comprises, by weight, 100 parts of resin, 0.1-3 parts of a release agent, 10-15 parts of a curing agent and 10-50 parts of a filler.

Preferably, the resin is unsaturated polyester resin, the release agent is a solution type internal release agent, and the curing agent is at least one of a styrene compound, peroxide or azo compound; the filler is at least one of heavy calcium carbonate, aluminum hydroxide and light calcium carbonate.

Preferably, the volume ratio of the total volume of the impregnated fiber and multiaxial fiber fabric to the resin matrix is X: (1-X), wherein X is more than or equal to 0.4 and less than or equal to 0.8.

Preferably, the marine corrosion protection shield obtained has an internal diameter of 0.8-1.5 m.

The invention also provides the anti-corrosion protective cover obtained by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure.

Preferably, the device comprises a semicircular arc-shaped plate, wherein two sides of the arc-shaped plate are respectively provided with a side plate extending towards the side direction; the inner diameter of the arc-shaped plate is 0.8-1.5m, and the thickness of each side plate is 8-10 mm; the arc-shaped plate comprises a middle section and side arc-shaped sections which are respectively arranged at two sides of the middle section, the thickness of the middle section is 3-5mm, the thickness of the side arc-shaped sections is gradually increased from the middle section to the side plate direction, and the thickness of the side arc-shaped sections is increased to be the same as that of the side plate; the included angle between the arc-shaped plate and the side plate is 90-120 degrees.

Compared with the prior art, the pultrusion method of the large-scale anticorrosion protective cover for the marine steel structure provided by the invention has the following steps:

1. according to the invention, the large-scale corrosion-resistant protective cover can be rapidly and mechanically prepared by the pultrusion method of the large-scale corrosion-resistant protective cover for the marine steel structure, manual pasting is not needed, the labor force is saved, the working efficiency is high, and the cost is reduced.

2. The large-scale anti-corrosion protective cover obtained by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure has good impact resistance and tensile property which far exceed the national standard.

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 other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a large corrosion protection cover for marine steel structures according to the present invention.

Description of reference numerals:

1. an arc-shaped plate; 101. a middle section; 102. a side arc segment.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a pultrusion method of a large-scale anticorrosion protective cover for a marine steel structure, which comprises the following steps:

s1) drawing the fiber and the multiaxial fiber fabric, threading and arranging the fiber and dipping the fiber, and layering and dipping the multiaxial fiber fabric to obtain a dipped fiber and a dipped multiaxial fiber fabric;

s1), the dipped fiber and the dipped multiaxial fiber fabric enter a mold with a heating function under the action of traction force, and are cured and pultruded to obtain an anti-corrosion protective cover;

wherein the temperature at the inlet end of the mold is set to be 90-130 ℃, the temperature at the outlet end of the mold is set to be 115-155 ℃,

the multiaxial fiber fabric is formed by weaving 0-degree directional fibers, 90-degree directional fibers and chopped strand mats, and the single weight of the multiaxial fiber fabric is 890g/m²Wherein the fiber weight in the 0 DEG direction is 160g/m²The single weight of the fiber in the 90-degree direction is 500g/m²The single weight of the chopped strand mat is 230g/m²；

The included angle of the traction direction of the impregnated fiber and the impregnated multiaxial fiber fabric is 0 degree.

Specifically, the traction force is 200KN-400KN, and the pultrusion speed is 0.08m/min-0.2 m/min.

Specifically, the tractive effort was 350KN, with a speed of 0.2 m/min.

Specifically, the fibers are alkali-free glass fibers, and the multiaxial fiber fabric is alkali-free glass fibers.

Specifically, both the fibers and the axial fiber fabric are soaked in a resin matrix; the resin matrix comprises, by weight, 100 parts of resin, 0.1-3 parts of a release agent, 10-15 parts of a curing agent and 10-50 parts of a filler.

Specifically, the resin is unsaturated polyester resin, the release agent is a solution type internal release agent, and the curing agent is at least one of a styrene compound, peroxide or an azo compound; the filler is at least one of heavy calcium carbonate, aluminum hydroxide and light calcium carbonate.

Specifically, the volume ratio of the total volume of the impregnated fiber and multiaxial fiber fabric to the resin matrix is X: (1-X), wherein X is more than or equal to 0.4 and less than or equal to 0.8.

Specifically, the obtained marine corrosion protection cover has an inner diameter of 0.8-1.5 m.

The invention also provides the anti-corrosion protective cover obtained by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure.

Specifically, the device comprises a semicircular arc-shaped plate 1, wherein two sides of the arc-shaped plate 1 are respectively provided with a side plate 2 extending laterally; the inner diameter of the arc-shaped plate 1 is 0.8-1.5m, and the thickness of each side plate 2 is 8-10 mm; the arc-shaped plate 1 comprises a middle section 101 and side arc-shaped sections 102 which are respectively arranged at two sides of the middle section 101, the thickness of the middle section 101 is 3-5mm, and the thickness of the side arc-shaped sections 102 is gradually increased from the middle section to the side plate 2 and is increased to be the same as that of the side plate 2; the included angle between the arc plate 1 and the side plate 2 is 90-120 degrees.

The large-scale anti-corrosion protective cover for the marine steel structure can be quickly and mechanically prepared by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure, has good impact resistance and tensile property, can be used for the marine steel structure, does not need manual pasting, and has low production cost, high degree of mechanization and high efficiency.

Example one

Sample 1 was prepared as follows:

101) drawing the fiber and the multiaxial fiber fabric, threading and arranging the fiber and performing gum dipping treatment, and layering and gum dipping treatment on the multiaxial fiber fabric to obtain a gum dipped fiber and a gum dipped multiaxial fiber fabric;

102) the dipped fiber and the dipped multiaxial fiber fabric enter a mold with a heating function under the action of traction force, and are cured and pultruded to obtain an anti-corrosion protective cover;

wherein the temperature at the inlet end of the die is set to 90 ℃, the temperature at the outlet end of the die is set to 115 ℃,

the multiaxial fiber fabric is formed by weaving 0-degree directional fibers, 90-degree directional fibers and chopped strand mats, and the single weight of the multiaxial fiber fabric is 890g/m²Wherein the fiber weight in the 0 DEG direction is 160g/m²The single weight of the fiber in the 90-degree direction is 500g/m²The single weight of the chopped strand mat is 230g/m²；

The included angle of the traction direction of the dipped fiber and the dipped multiaxial fiber fabric is 0 degree;

the traction force is 350KN, and the speed is 0.2 m/min;

the fiber is alkali-free glass fiber, and the multiaxial fiber fabric is alkali-free glass fiber;

the fibers and the axial fiber fabrics are soaked in the resin matrix; the resin matrix comprises 100 parts of resin, 2 parts of release agent, 15 parts of curing agent and 50 parts of filler according to parts by weight; the resin is unsaturated polyester resin, the release agent is a solution type internal release agent, the curing agent is a styrene compound, peroxide and an azo compound which are compounded, the styrene compound is tert-butyl ester TBPB, the peroxide is benzoyl peroxide BPO, and the azo compound is a curing agent PULCAT, and the three are compounded in a mass ratio of 1:1: 0.5; the filler is heavy calcium carbonate, aluminum hydroxide and light calcium carbonate, and the mass ratio of the heavy calcium carbonate to the aluminum hydroxide to the light calcium carbonate is 1:0.5: 1.

The volume ratio of the total volume of the impregnated fiber and multiaxial fiber fabric to the volume of the resin matrix is 0.4: 0.6.

the anti-corrosion protective cover obtained by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure comprises a semicircular arc plate 1, wherein two sides of the arc plate 1 are respectively provided with a side plate 2 extending towards the side direction; the inner diameter of the arc-shaped plate 1 is 1.2m, and the thickness of each side plate 2 is 10 mm; the arc-shaped plate 1 comprises a middle section 101 and side arc-shaped sections 102 which are respectively arranged at two sides of the middle section 101, the thickness of the middle section 101 is 4mm, the thickness of the side arc-shaped sections 102 is gradually increased from the middle section to the side plate 2, and the thickness of the side arc-shaped sections is the same as that of the side plate 2; the included angle between the arc plate 1 and the side plate 2 is 120 degrees.

Property parameters of sample 1 obtained, among others impact resistanceCan transversely be 3.51 multiplied by 10⁶kj/m³Longitudinal direction of 3.86X 10⁶kj/m³Far exceeding the standard requirement of 2.5X 10⁶kj/m³The transverse tensile strength is 90MPa, the transverse bending strength is 200MPa, the longitudinal tensile strength and the bending strength are more than 300MPa and 400MPa, and both the longitudinal tensile strength and the bending strength are more than the requirements of GB/T32119-2015 (the transverse and longitudinal bending strength is more than or equal to 100MPa, and the tensile strength is more than or equal to 50 MPa).

Example two

Sample 2 was prepared as follows:

201) drawing the fiber and the multiaxial fiber fabric, threading and arranging the fiber and performing gum dipping treatment, and layering and gum dipping treatment on the multiaxial fiber fabric to obtain a gum dipped fiber and a gum dipped multiaxial fiber fabric;

202) the dipped fiber and the dipped multiaxial fiber fabric enter a mold with a heating function under the action of traction force, and are cured and pultruded to obtain an anti-corrosion protective cover;

wherein the temperature at the inlet end of the die is set to 130 ℃, the temperature at the outlet end of the die is set to 150 ℃,

the multiaxial fiber fabric is formed by weaving 0-degree directional fibers, 90-degree directional fibers and chopped strand mats, and the single weight of the multiaxial fiber fabric is 890g/m²Wherein the fiber weight in the 0 DEG direction is 160g/m²The single weight of the fiber in the 90-degree direction is 500g/m²The single weight of the chopped strand mat is 230g/m²；

The included angle of the traction direction of the dipped fiber and the dipped multiaxial fiber fabric is 0 degree;

the traction force is 350KN, and the speed is 0.2 m/min;

the fiber is alkali-free glass fiber, and the multiaxial fiber fabric is alkali-free glass fiber;

the fibers and the axial fiber fabrics are soaked in the resin matrix; the resin matrix comprises 100 parts of resin, 2 parts of release agent, 15 parts of curing agent and 50 parts of filler according to parts by weight; the resin is unsaturated polyester resin, the release agent is a solution type internal release agent, the curing agent is a styrene compound, peroxide and an azo compound which are compounded, the styrene compound is tert-butyl ester TBPB, the peroxide is benzoyl peroxide BPO, and the azo compound is a curing agent PULCAT, and the three are compounded in a mass ratio of 1:1: 0.5; the filler is heavy calcium carbonate, aluminum hydroxide and light calcium carbonate, and the mass ratio of the heavy calcium carbonate to the aluminum hydroxide to the light calcium carbonate is 1:0.5: 1.

The volume ratio of the total volume of the impregnated fiber and multiaxial fiber fabric to the volume of the resin matrix is 0.4: 0.6.

the anti-corrosion protective cover obtained by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure comprises a semicircular arc plate 1, wherein two sides of the arc plate 1 are respectively provided with a side plate 2 extending towards the side direction; the inner diameter of the arc-shaped plate 1 is 1.2m, and the thickness of each side plate 2 is 10 mm; the arc-shaped plate 1 comprises a middle section 101 and side arc-shaped sections 102 which are respectively arranged at two sides of the middle section 101, the thickness of the middle section 101 is 4mm, the thickness of the side arc-shaped sections 102 is gradually increased from the middle section to the side plate 2, and the thickness of the side arc-shaped sections is the same as that of the side plate 2; the included angle between the arc plate 1 and the side plate 2 is 120 degrees.

Property parameters of sample 2 obtained, in which the impact resistance was 3.61X 10 in the transverse direction⁶kj/m³Longitudinal direction of 3.92X 10⁶kj/m³Far exceeding the standard requirement of 2.6X 10⁶kj/m³The transverse tensile strength is 92MPa, the transverse bending strength is 203MPa, the longitudinal tensile strength and the bending strength are far more than 300MPa and 400MPa, and both far exceed the requirements of GB/T32119-2015 (the transverse and longitudinal bending strength is required to be more than or equal to 100MPa, and the tensile strength is more than or equal to 50 MPa).

Example two differs from example one only in that the temperatures at the entrance and exit ends of the die were different and sample 2 was obtained far in excess of national standards.

The large-scale anti-corrosion protective cover for the marine steel structure can be quickly and mechanically prepared by the pultrusion method of the large-scale anti-corrosion protective cover for the marine steel structure, has good impact resistance and tensile property, can be used for the marine steel structure, does not need manual pasting, and has low production cost, high degree of mechanization and high efficiency.

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.