CN114484098B - Hydrogen and natural gas mixed energy transmission pipeline and preparation method thereof - Google Patents
Hydrogen and natural gas mixed energy transmission pipeline and preparation method thereof Download PDFInfo
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- CN114484098B CN114484098B CN202210077558.4A CN202210077558A CN114484098B CN 114484098 B CN114484098 B CN 114484098B CN 202210077558 A CN202210077558 A CN 202210077558A CN 114484098 B CN114484098 B CN 114484098B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
- F16L9/19—Multi-channel pipes or pipe assemblies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
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Abstract
The invention discloses a hydrogen and natural gas mixed energy transmission pipeline and a preparation method thereof, wherein the transmission pipeline sequentially comprises a hydrogen transmission layer, a first barrier layer, a first protective layer, a reinforcing layer, a second protective layer, a natural gas transmission layer, a second barrier layer and a third protective layer from inside to outside, support bars are arranged in the natural gas transmission layer and used for maintaining the form of a transmission cavity of the natural gas transmission layer, the width of each support bar is 5-7 mm, the ratio of the number of the support bars to the inner diameter of a natural gas transmission layer pipe is 1:15, the inner diameter unit is mm, the number of the support bars is an integer, the thickness of each support bar is consistent with the thickness of a cavity of the natural gas transmission layer, and each support bar is spiral. The pipeline can be used for conveying hydrogen and natural gas in a mixing way, improves the transmission efficiency and the simplicity, has long service life and meets the requirement of high-pressure conveying.
Description
Technical Field
The invention belongs to the technical field of gas transmission pipelines, and particularly relates to a hydrogen and natural gas mixed energy transmission pipeline.
Background
The hydrogen energy source mode is more, and is an environment-friendly energy source. Natural gas is a relatively clean energy source, but the production and central gas use zones are typically remote and require remote delivery of the natural gas to the user area. The hydrogen has huge potential as an energy source, the country is beginning to develop the hydrogen energy source, the high-pressure gaseous hydrogen transportation is the most mature hydrogen energy transportation mode at the present stage, but the hydrogen transportation cost is higher, and the price of the hydrogen transportation pipe is more than 2 times of that of a natural gas pipeline. The conventional hydrogen conveying pipeline is a steel pipeline, and because the molecular weight of hydrogen is extremely small, the hydrogen easily enters into lattices of a plurality of metals, and hydrogen embrittlement sites are caused, so that the pipeline is damaged. The possibility of leakage is high in addition to the hydrogen embrittlement phenomenon. Therefore, the steel pipeline material for conveying hydrogen is a special material, such as Monel alloy, and is an alloy which takes metallic nickel as a matrix and is added with other elements such as copper, iron, manganese and the like. The natural gas pipeline is changed into the hydrogen conveying pipeline in the world, but because of the difference of the materials of the natural gas pipeline and the hydrogen conveying pipeline, hydrogen is inflammable and explosive and is easy to cause hydrogen embrittlement, the mixing and conveying of the natural gas and the hydrogen are controversial, and unknown dangerous factors are provided.
The conventional conveying pipeline can only convey a single medium, and has lower utilization efficiency under the background of high-speed development and high resource and land utilization rate requirements; the common conveying pipe is a steel pipe, hydrogen embrittlement easily occurs when conveying hydrogen, and the pipeline is seriously damaged; the difference between the natural gas pipeline and the hydrogen pipeline is large, and the danger of conveying hydrogen by the natural gas pipeline is large; the natural gas and hydrogen mixing and conveying and hydrogen separation processes are complex, and the operation is inconvenient.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a hydrogen and natural gas mixed energy transmission pipeline, which adopts one pipeline to convey hydrogen and natural gas.
In order to achieve the above purpose, the following technical scheme is provided:
the utility model provides a hydrogen natural gas hybrid energy transmission pipeline, transmission pipeline contains hydrogen transmission layer, first barrier layer, first protective layer, enhancement layer, second protective layer, natural gas transmission layer, second barrier layer and third protective layer from inside to outside in proper order, is equipped with the support bar in the natural gas transmission layer, and the support bar is used for maintaining the transportation cavity form of natural gas transmission layer, the support bar width is 5~7mm, and the ratio of the quantity of support bar and the internal diameter of natural gas transmission layer pipe is 1:15, and the internal diameter unit is mm, and the quantity of support bar takes the integer, and the thickness of support bar is unanimous with natural gas transmission layer cavity thickness, and the support bar is the heliciform.
Further, the material of the hydrogen transmission layer is polyethylene, polypropylene, polytetrafluoroethylene or polyamide, the material of the natural gas transmission layer is short glass fiber, inorganic filler or polyester fiber reinforced composite material, and the matrix of the polyester fiber reinforced composite material is the same as the material of the hydrogen transmission layer.
Further, the first protective layer, the second protective layer and the third protective layer are respectively the same as the hydrogen transmission layer, the reinforcing layer is a glass fiber prepreg tape, the first barrier layer is an aluminum tape, and the second barrier layer is an EVOH.
The preparation method of the hydrogen and natural gas mixed energy transmission pipeline comprises the following steps:
1) The aluminum strip is coiled, connected and stored by an uncoiling machine, a strip connecting machine and a strip storage bin, the aluminum strip is changed into an aluminum half pipe by a rolling wheel forming machine on a welding platform, the aluminum half pipe is heated to 200-220 ℃ by a heater, then the aluminum half pipe enters an inner pipe machine head to be subjected to sizing and butt joint treatment to form an aluminum pipe, the aluminum pipe is then taken out of a die, the aluminum pipe is welded by a welding gun, the aluminum pipe is used as a first barrier layer, and the welding power is 2000-3000w;
2) Heating and extruding the raw materials of the hydrogen transmission layer, the hot melt adhesive and the first protective layer to a screw extruder, wherein the processing temperature is 195-205 ℃, extruding the hot melt adhesive from an inner pipe head to the inner wall of an aluminum pipe to serve as a first bonding resin layer, extruding the hydrogen transmission layer to the inner wall of the first bonding resin layer, simultaneously blowing compressed air to expand and press the hydrogen transmission layer, wherein the pressure of the compressed air is 0-1MPa, the air speed is 0.5-2m/s, then entering a hot melt adhesive extruder die, extruding the hot melt adhesive to the outer surface of the aluminum pipe to serve as a second bonding resin layer, then entering a first protective layer extruder to extrude the first protective layer raw material, and adjusting the size and the appearance of the outer surface of each layer by adjusting the extrusion amount, the traction speed and the vacuum degree of a screw to ensure the surface to be flat;
3) After the first protective layer is extruded and regulated, the glass fiber prepreg tape enters a winding unit, a baking gun is used for heating the glass fiber prepreg tape, resin is stuck on the glass fiber prepreg tape, the resin is melted and then stuck on the outer surface of the first protective layer, and the two groups of winding units are respectively used as a reinforcing layer for winding in the clockwise direction and the anticlockwise direction, wherein the winding angle is 30-60 degrees;
4) After winding, the raw materials of the second protective layer are extruded by a screw extruder and then coated on the reinforcing layer, the coated raw materials enter an oven after coating is finished, the temperature of the second protective layer is increased, the supporting bar and the natural gas transmission layer are extruded by the same extruder, the raw materials pass through a die head and a shaping cooling die, so that the supporting bar and the natural gas transmission layer are integrally formed, the second protective layer is softened after being heated by the oven and is contacted with the supporting bar, bonding is carried out, the rotating speed of the screw and a die controllable nut are regulated, the size of the natural gas transmission layer is regulated, the natural gas transmission layer is molded and shaped by cooling a sizing box, the second protective layer and the supporting bar are made of the same type of materials, and the bonding effect of the two is further enhanced;
5) And (3) entering a three-layer co-extrusion die head, extruding hot melt adhesive and EVOH through the three-layer co-extrusion die head, and forming a pipe body by a vacuum sizing sleeve, wherein a third bonding resin layer, a second barrier layer and a fourth bonding resin layer are sequentially arranged from inside to outside, finally extruding a third protective layer raw material to coat, and after the coating is completed, enabling the pipe body to enter a tractor and a cutting machine to form a finished pipe.
Further, the thickness ratio of the hydrogen gas transmission layer, the first bonding resin layer, the first barrier layer, the second bonding resin layer and the first protective layer from inside to outside is 5:0.5:2:0.5:2.
Further, after the second protective layer in the step 4) is coated, the material enters an oven, and the temperature of the second protective layer is increased to 120-130 ℃.
Further, the temperature of the baking gun in the step 3) is 250-270 ℃, and a certain distance is reserved between the baking gun and the prepreg tape, so that the temperature of the prepreg tape is stabilized at 130-140 ℃.
The invention has the beneficial effects that: the pipeline can be used for mixing and conveying hydrogen and natural gas, so that the transmission efficiency and simplicity are improved, the service life is long, high-pressure conveying is met, the natural gas conveying layer is made of reinforcing materials, the pipeline is integrally formed, the bearing pressure is high, the pressures on two sides of the supporting bar are the same, deformation cannot occur in the use process, damage such as damage and stripping of the natural gas conveying layer is avoided, the aluminum belt and the EVOH barrier materials are adopted, the barrier effects on hydrogen and natural gas are extremely strong, the hydrogen and the natural gas cannot mutually permeate, the conveying pressure of the hydrogen and the natural gas conveying layer is the same, and the damage risk of the material between the natural gas conveying layer and the hydrogen conveying layer under high-pressure conveying is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1. a hydrogen transport layer; 2. a first adhesive resin layer; 3. a first barrier layer; 4. a first protective layer; 5. a reinforcing layer; 6. a second protective layer; 7. a natural gas transport layer; 8. a second barrier layer; 9. a third protective layer; 10. a support bar; 11. a second adhesive resin layer; 12. a third adhesive resin layer; 13. and a fourth adhesive resin layer.
Detailed Description
The invention will be further described with reference to the drawings and examples of the specification, but the scope of the invention is not limited thereto.
As shown in fig. 1, a hydrogen and natural gas mixed energy transmission pipeline comprises a hydrogen transmission layer 1, a first barrier layer 3, a first protection layer 4, a reinforcing layer 5, a second protection layer 6, a natural gas transmission layer 7, a second barrier layer 8 and a third protection layer 9 from inside to outside, wherein a support bar 10 is arranged in the natural gas transmission layer 7, and the form of a transmission cavity is maintained through the support bar 10.
The preparation method of the hydrogen and natural gas mixed energy transmission pipeline comprises the following steps:
1) The aluminum belt is coiled, connected and stored by an uncoiling machine, a belt connecting machine and a belt storage bin, the aluminum belt is changed into an aluminum half pipe by a rolling wheel forming machine on a welding platform, the aluminum half pipe is heated to 210 ℃ by a heater, then the aluminum half pipe enters an inner pipe machine head to be subjected to sizing and butt joint treatment and is then taken out of a die, the aluminum pipe is welded by a welding gun, the aluminum pipe is used as a first barrier layer 3, and the welding power is 2300w;
2) Heating and extruding raw materials of the hydrogen transmission layer 1, hot melt adhesive and the first protective layer 4 into a screw extruder through a dryer and a Mi Chong instrument, wherein the processing temperature is 200 ℃, extruding the hot melt adhesive from an inner pipe head to the inner wall of an aluminum pipe to be used as a first bonding resin layer 2, extruding the raw materials of the hydrogen transmission layer 1 onto the inner wall of the first bonding resin layer 2, the extruding temperature is 190 ℃, simultaneously blowing compressed air to expand and press the hydrogen transmission layer 1, the pressure of the compressed air is 1MPa, the air speed is 2m/s, then entering a hot melt adhesive extruder die, extruding the hot melt adhesive from the outer surface of the aluminum pipe to be used as a second bonding resin layer 11, then entering the first protective layer 4 extruder to extrude the raw materials of the first protective layer 4, adjusting the size and the appearance of each layer through adjusting the extrusion amount of the screw, the traction speed and the vacuum degree, ensuring the surface to be flat, wherein the thickness of the hydrogen transmission layer 1 is 2.5mm, the thickness of the first bonding resin layer 2 is 0.25mm, the thickness of the first barrier layer 3 is 1mm, the thickness of the second bonding resin layer 11 is 0.25mm, and the thickness of the first protective layer 4 is 1mm;
3) After the first protective layer 4 is extruded and regulated, the glass fiber prepreg tape enters a winding unit, a baking gun is used for heating the glass fiber prepreg tape, the temperature of the baking gun is 263 ℃, the temperature of the prepreg tape is stabilized at 130-140 ℃, the glass fiber prepreg tape is stuck with resin, the resin is melted and then is stuck with the outer surface of the first protective layer 4, and the two groups of winding units are respectively used for winding in the clockwise and anticlockwise directions as a reinforcing layer 5, and the winding angle is 30-60 degrees;
4) After winding, the raw material polyethylene of the second protective layer 6 is extruded and coated on the reinforcing layer 5 through a raw material screw rod, the raw material polyethylene enters an oven after coating is finished, the temperature of the second protective layer 6 is increased to 125 ℃, the supporting bar and the natural gas transmission layer are extruded through the same extruder, the raw material passes through a die head and a shaping cooling die, so that the supporting bar and the natural gas transmission layer are integrally formed, the second protective layer is softened after being heated by the oven, is contacted with the supporting bar and is bonded, the rotating speed of the screw rod and a die controllable nut are regulated, the size of the natural gas transmission layer is regulated, and the forming and the rapid cooling shaping are carried out through the die and a cooling sizing box;
5) And extruding the hot melt adhesive and the EVOH, forming a pipe body through a three-layer co-extrusion die head and a vacuum sizing sleeve, sequentially arranging a third bonding resin layer 12, a second barrier layer 8 and a fourth bonding resin layer 13 from inside to outside, finally extruding a third protective layer 9 to coat, wherein the raw material of the third protective layer 9 is polyethylene, and after the coating is finished, enabling the pipe body to enter a tractor and a cutting machine to form a finished pipe.
The nominal outer diameter of the finished pipe is 110mm, the inner diameter of the finished pipe is 55mm, the thickness of the natural gas transmission layer 7 is 20mm, the number of layers of the glass fiber prepreg tape is 4, the thickness of the first barrier layer 3 is 1mm, the thicknesses of the hydrogen transmission layer 1 and the first protective layer 4 are respectively 2.5mm and 1mm, the ring stiffness is more than or equal to 150KN/m < 2 >, and the burst strength is more than or equal to 23MPa.
Claims (6)
1. The preparation method of the hydrogen and natural gas mixed energy transmission pipeline is characterized in that the transmission pipeline sequentially comprises a hydrogen transmission layer (1), a first barrier layer (3), a first protective layer (4), a reinforcing layer (5), a second protective layer (6), a natural gas transmission layer (7), a second barrier layer (8) and a third protective layer (9) from inside to outside, support bars (10) are arranged in the natural gas transmission layer (7), the support bars (10) are used for maintaining the form of a transmission cavity of the natural gas transmission layer (7), the width of the support bars (10) is 5-7 mm, the ratio of the number of the support bars (10) to the inner diameter of a pipe of the natural gas transmission layer (7) is 1:15, the unit of the inner diameter is mm, the number of the support bars (10) is an integer, the thickness of the support bars (10) is consistent with the thickness of a cavity of the natural gas transmission layer (7), and the support bars (10) are spiral, and the preparation method comprises the following steps:
1) The aluminum strip is coiled, connected and stored by an uncoiling machine, a strip connecting machine and a strip storage bin, the aluminum strip is changed into an aluminum half pipe by a rolling wheel forming machine on a welding platform, the aluminum half pipe is heated to 200-220 ℃ by a heater, then enters an inner pipe machine head for sizing and butt joint treatment, is formed into an aluminum pipe, and is then taken out of a die, welded into the aluminum pipe by a welding gun, and the aluminum pipe is used as a first barrier layer (3), wherein the welding power is 2000-3000w;
2) Heating and extruding raw materials of a hydrogen transmission layer (1), hot melt adhesive and a first protective layer (4) into a screw extruder, wherein the processing temperature is 195-205 ℃, extruding the hot melt adhesive on the inner wall of an aluminum pipe by an inner pipe machine head to serve as a first bonding resin layer (2), extruding the hydrogen transmission layer (1) on the inner wall of the first bonding resin layer (2), simultaneously blowing compressed air to expand and press the hydrogen transmission layer (1), wherein the pressure of the compressed air is 0-1MPa, the air speed is 0.5-2m/s, then entering a hot melt adhesive extruder die, extruding the hot melt adhesive on the outer surface of the aluminum pipe to serve as a second bonding resin layer (11), then entering the first protective layer (4) extruder to extrude the raw materials of the first protective layer (4), and adjusting the size and the appearance of the outer surface of each layer by adjusting the extruding amount, the traction speed and the vacuum degree of the screw to ensure the surface to be flat;
3) After the first protective layer (4) is extruded and regulated, the glass fiber prepreg tape enters a winding unit, a baking gun is used for heating the glass fiber prepreg tape, resin is stuck on the glass fiber prepreg tape, the resin is melted and stuck with the outer surface of the first protective layer (4), and the glass fiber prepreg tape is used as a reinforcing layer (5), and the two groups of winding units are respectively wound in the clockwise direction and the anticlockwise direction, wherein the winding angle is 30-60 degrees;
4) After winding, the raw materials of the second protective layer (6) are extruded by a screw extruder and then coated on the reinforcing layer (5), the coated raw materials enter an oven after coating is finished, the temperature of the second protective layer (6) is improved, the supporting bar (10) and the natural gas transmission layer (7) are extruded by the same extruder, the raw materials pass through a die head and a shaping cooling die, the supporting bar (10) and the natural gas transmission layer (7) are integrally formed, the second protective layer (6) is softened after being heated by the oven, is contacted with the supporting bar (10) and then is bonded, the rotating speed of the screw and a die controllable nut are adjusted, so that the size of the natural gas transmission layer (7) is adjusted, and the natural gas transmission layer (7) is molded, cooled and shaped quickly;
5) And (3) entering a three-layer co-extrusion die head, extruding hot melt adhesive and EVOH through the three-layer co-extrusion die head, and forming a pipe body by a vacuum sizing sleeve, wherein a third bonding resin layer (12), a second barrier layer (8) and a fourth bonding resin layer (13) are sequentially arranged from inside to outside, finally extruding a raw material of a third protective layer (9) to coat, and after the coating is finished, enabling the pipe body to enter a tractor and a cutting machine to form a finished pipe.
2. The preparation method according to claim 1, wherein the material of the hydrogen transmission layer (1) is polyethylene, polypropylene, polytetrafluoroethylene or polyamide, the material of the natural gas transmission layer (7) is short glass fiber, inorganic filler or polyester fiber reinforced composite material, and the matrix of the polyester fiber reinforced composite material is the same as the material of the hydrogen transmission layer (1).
3. The preparation method according to claim 2, wherein the first protective layer (4), the second protective layer (6) and the third protective layer (9) are respectively made of the same material as the hydrogen transmission layer (1), the reinforcing layer (5) is a glass fiber prepreg tape, the first barrier layer (3) is an aluminum tape, and the second barrier layer (8) is made of EVOH.
4. The method of manufacturing according to claim 1, wherein the thickness ratio of the hydrogen gas transport layer (1), the first adhesive resin layer (2), the first barrier layer (3), the second adhesive resin layer (11) and the first protective layer (4) from the inside to the outside is 5:0.5:2:0.5:2.
5. The method according to claim 1, wherein the second protective layer (6) is coated in step 4) and then put into an oven, and the temperature of the second protective layer (6) is raised to 120-130 ℃.
6. The method of claim 1, wherein the temperature of the baking gun in step 3) is 250-270 ℃, and the distance between the baking gun and the prepreg tape is such that the prepreg tape temperature is stabilized at 130-140 ℃.
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| CN202210077558.4A CN114484098B (en) | 2022-01-24 | 2022-01-24 | Hydrogen and natural gas mixed energy transmission pipeline and preparation method thereof |
| PCT/CN2022/100128 WO2023137968A1 (en) | 2022-01-24 | 2022-06-21 | Hydrogen and natural gas mixed energy transmission pipeline and preparation method therefor |
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| CN202210077558.4A CN114484098B (en) | 2022-01-24 | 2022-01-24 | Hydrogen and natural gas mixed energy transmission pipeline and preparation method thereof |
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| CN114484098A CN114484098A (en) | 2022-05-13 |
| CN114484098B true CN114484098B (en) | 2023-07-14 |
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| CN114484098B (en) * | 2022-01-24 | 2023-07-14 | 临海伟星新型建材有限公司 | Hydrogen and natural gas mixed energy transmission pipeline and preparation method thereof |
| CN115013729B (en) * | 2022-06-01 | 2023-03-21 | 上海飞舟博源石油装备股份有限公司 | Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe |
| CN116753368B (en) * | 2023-08-09 | 2024-01-16 | 浙江大学 | Composite pipe capable of preventing hydrogen permeation bulge, design method of composite pipe and hydrogen transmission pipe network |
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| WO2023137968A1 (en) | 2023-07-27 |
| CN114484098A (en) | 2022-05-13 |
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