CN111497274A - Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe - Google Patents
Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe Download PDFInfo
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- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
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- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
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Abstract
The invention discloses a preparation method of an impact-resistant strain-corrosion-resistant continuously-wound glass steel tube. The impact-resistant strain-corrosion-resistant continuous winding glass steel tube selects the flexible unsaturated polyester resin lining, the molecular chain contains tetrahydrophthalic anhydride groups, the elongation at break is up to more than 20%, the impact resistance is good, the lining is not easy to crack when being impacted externally, and the strain level of 1.1% can reach more than 1000 hours when a sulfuric acid strain corrosion test is carried out.
Description
Technical Field
The invention relates to the technical field of glass steel pipes, in particular to a preparation method of an impact-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
Background
The glass fiber reinforced plastic pipeline is a resin-based composite pipe, has high strength, corrosion resistance, smooth pipe wall and excellent hydraulic performance, and has wide application background in municipal construction of water supply and drainage pipeline engineering and the like. However, the currently common glass fiber reinforced plastic pipeline adopts m-benzene type unsaturated polyester resin or vinyl resin as lining resin, the elongation at break is usually only about 3%, and the highest elongation at break is 5%, and the lining is easy to crack during external impact and sulfuric acid strain corrosion, causing damage or leakage failure. In addition, a fixed-length winding process is often adopted in the manufacturing process of the glass fiber reinforced plastic pipeline, and due to production discontinuity, the process is not easy to control, the production efficiency is low, and the quality of the pipe is unstable. Furthermore, in the existing production process of continuously winding the glass fiber reinforced plastic pipeline, the resin on the surface of the glass fiber reinforced plastic is mainly heated by infrared rays for curing, the lining resin needs to be cured by temperature transmission on the outer surface of the pipe wall, and the surface temperature can not be transmitted to the lining resin when the pipeline with a thicker pipe wall is produced, so that the lining resin can not be cured; when the production speed is improved, the time for the pipeline to pass through the infrared heating area is short, the curing effect cannot be achieved, and the product quality is influenced.
Chinese patent CN106808707A discloses a continuous winding glass reinforced plastic tube production process and a production line thereof, which comprises a base, a main gantry large stand, a steel belt mold supporting and circulating propulsion system installed on the base, a 3D printing and distributing system, a heating and curing monitoring system and a synchronous cutting and finishing system. The continuous fiber, the chopped fiber, the particle reinforced material and the resin can be perfectly distributed according to the design requirement, but the continuous winding glass steel tube has low elongation at break and is easy to crack under the external impact or sulfuric acid strain corrosion.
Chinese patent CN104455790B discloses a glass fiber reinforced plastic PE composite pipe and a continuous winding production process, comprising a glass fiber reinforced plastic layer, wherein an inner reinforcing layer is arranged on the inner wall of the glass fiber reinforced plastic layer, and a PE layer is arranged on the inner wall of the inner reinforcing layer; the outer surface of the glass fiber reinforced plastic layer is sequentially provided with an outer reinforcing layer and an outer protective layer from inside to outside; the PE layer is turned outwards from the inner surface of the pipeline body along two ends of the pipeline body and is attached to the outer protection layer by a section of flanging length. The process is finished by winding, curing, cutting, sealing and the like. The glass fiber reinforced plastic PE composite pipe has multiple structural layers and low curing efficiency.
Therefore, in order to overcome the difficult problems in the industry, the invention provides a preparation method of the shock-resistant and strain corrosion-resistant continuously-wound glass steel tube, on one hand, the lining resin is directly heated by transferring heat from the inner wall of the pipeline through heating a steel belt die, and an infrared heating system is assisted on the outer surface of the wall of the pipeline, so that the curing efficiency of the resin is improved, and the preparation method is very important for lining resin which has long curing time or needs to be quickly cured, such as epoxy resin, flexible unsaturated polyester resin and the like; on the other hand, a flexible unsaturated polyester resin lining is selected, molecular chains contain tetrahydrophthalic anhydride groups, the elongation at break is high, the impact resistance is good, and the stability and the mechanical strength of the lining layer can be enhanced.
Disclosure of Invention
Aiming at the problems, the invention provides a preparation method of an impact-resistant and strain corrosion-resistant continuous winding glass steel tube.
The technical scheme adopted by the invention for solving the problems is as follows: a preparation method of an impact-resistant and strain-corrosion-resistant continuously-wound glass reinforced plastic pipe comprises the steps of raw material preparation, continuous winding of a glass reinforced plastic inner liner layer and a glass reinforced plastic structure layer, curing and shaping, and cutting; the method comprises the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body;
step III, curing and shaping: curing the formed pipeline body in the step II for 20-30 min at the temperature of 75-135 ℃ to finish curing;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
Further, in the step I, the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing the flexible unsaturated polyester resin, the auxiliary agent, the initiator and the cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 1-5 min to obtain the glass fiber reinforced plastic inner liner mixture, wherein the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride groups.
Furthermore, the mass ratio of the flexible unsaturated polyester resin, the auxiliary agent, the initiator and the cyclohexanone peroxide dibutyl phthalate paste is 10: 0-1.6: 0.03-0.1: 0.3. the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride groups, so that the elongation at break is high, and the comprehensive performance of the glass fiber reinforced plastic pipeline is enhanced.
Furthermore, the auxiliary agent is prepared from the following components in a mass ratio of 1: 3-5 of a composition of nano silicon dioxide and superfine calcium carbonate.
Furthermore, the initiator is prepared from the following components in a mass ratio of 0.5-0.6: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
Further, in the step II, the thickness of the glass fiber reinforced plastic lining layer is 1.2 mm-3.5 mm, and the thickness of the glass fiber reinforced plastic structure layer is 15 mm-45 mm.
Further, in the step III, before curing, the formed pipeline is preheated for 5min to 10min under the condition that the temperature is 45 ℃ to 50 ℃.
Further, in step III, a plate-type induction heater is used during curing. And a plate type induction heater is adopted to perform induction heating on the steel belt die, and the high-frequency magnetic field can penetrate through the nonmetallic glass fiber reinforced plastics to heat the steel belt which runs annularly. Through the principle of the cutting magnetic field of the circular motion of the steel belt die, electric energy is converted into heat energy to heat the steel belt, and then the heat energy is transferred to the inner wall of the glass fiber reinforced plastic. The temperature of the steel strip is detected by an infrared temperature probe in the heating process, the detected temperature is compared with the set temperature through a temperature control instrument, and the temperature is controlled within the set range.
Furthermore, the distance between the plate type induction heater and the surface of the steel strip mold is 9.0 cm-11.0 cm.
The invention also aims to provide a solidification heater for the shock-resistant and strain corrosion-resistant continuous winding glass reinforced plastic pipe, which consists of the continuous winding glass reinforced plastic pipe, a plate type induction heater, a steel belt mold and an infrared heater, wherein the plate type induction heater is arranged outside the continuous winding glass reinforced plastic pipe.
The invention has the advantages that:
(1) according to the shock-resistant and strain corrosion-resistant continuous winding glass steel tube, the flexible unsaturated polyester resin lining is selected, the molecular chain contains tetrahydrophthalic anhydride groups, the elongation at break is up to more than 20%, the shock resistance is good, the lining is not easy to crack when being impacted externally, the strain level of 1.1% can reach more than 1000 hours when a sulfuric acid strain corrosion test is carried out, and the damage time of the traditional resin lining is less than 100 hours;
(2) the invention relates to a preparation method of an impact-resistant and strain-corrosion-resistant continuous winding glass steel tube, which utilizes a continuous winding process to push steel strips to be formed, and an inner core mold formed by the steel strips has no friction with an inner lining in the forming and demolding processes to ensure the forming quality;
(3) according to the shock-resistant and strain corrosion-resistant continuously-wound glass steel tube, due to the difference of resin characteristics of the inner liner layer and the structural layer, the flexible unsaturated polyester resin of the inner liner layer is gelled before entering the structural layer, so that the mixing with the structural layer resin is avoided, the effect of the flexible inner liner is ensured, meanwhile, due to the short feeding area of the inner liner layer, a medium-frequency induction heating steel belt mold is adopted, heating is transmitted from inside to outside, the curing quality of the mixture of the inner liner is ensured, and the defect that bubbles are easily caused by adopting a traditional far infrared;
(4) according to the preparation method of the impact-resistant and strain corrosion-resistant continuous winding glass steel tube, the heat is transferred to the inner wall of the glass steel tube through the steel belt mold, the curing speed of the lining resin is increased, the production speed of a production line is increased, the process is controllable, and the product quality is stable.
Drawings
In order to more clearly illustrate the improvement of the method for manufacturing the impact-resistant and strain-corrosion-resistant continuously wound glass reinforced plastic pipe of examples 1 to 5 of the present invention, the curing heater in the process of manufacturing the impact-resistant and strain-corrosion-resistant continuously wound glass reinforced plastic pipe of the present invention is shown in the attached diagram. In the drawings:
FIG. 1 is a schematic view of an impact and strain corrosion resistant continuous wound FRP pipe curing heater of the present invention;
reference numbers in the figures: 1-continuously winding the glass steel tube; 2-plate induction heaters; 3-steel belt mould; 4-infrared heater.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Example 1
Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe
The method comprises the steps of raw material preparation, continuous winding of a glass fiber reinforced plastic inner lining layer and a glass fiber reinforced plastic structure layer, curing and shaping, and cutting;
the method comprises the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing flexible unsaturated polyester resin, an initiator and cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 5min to obtain a glass fiber reinforced plastic inner liner mixture; wherein, the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride group; the mass ratio of the flexible unsaturated polyester resin to the initiator to the cyclohexanone peroxide dibutyl phthalate paste is 10: 0.03: 0.3; the initiator is prepared from the following components in a mass ratio of 0.5: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
Step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body; the thickness of the glass fiber reinforced plastic lining layer is 1.2mm, and the thickness of the glass fiber reinforced plastic structural layer is 15 mm;
step III, curing and shaping: preheating the formed pipeline body in the step II for 5min at the temperature of 45 ℃, and then curing for 20min at the temperature of 75 ℃ to finish curing; wherein, a plate type induction heater is adopted; the distance between the plate type induction heater and the surface of the steel belt die is 9.0 cm;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
Example 2
Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe
The method comprises the steps of raw material preparation, continuous winding of a glass fiber reinforced plastic inner lining layer and a glass fiber reinforced plastic structure layer, curing and shaping, and cutting;
the method comprises the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing flexible unsaturated polyester resin, an auxiliary agent, an initiator and cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 1min to obtain a glass fiber reinforced plastic inner liner mixture; wherein, the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride group; the mass ratio of the flexible unsaturated polyester resin to the auxiliary agent to the initiator to the cyclohexanone peroxide dibutyl phthalate paste is 10: 1.6: 0.1: 0.3; the auxiliary agent is prepared from the following components in percentage by mass of 1: 5 of nano silica and ultrafine calcium carbonate; the initiator is prepared from the following components in a mass ratio of 0.6: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
Step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body; the thickness of the glass fiber reinforced plastic lining layer is 3.5mm, and the thickness of the glass fiber reinforced plastic structural layer is 45 mm;
step III, curing and shaping: preheating the formed pipeline body in the step II for 10min at the temperature of 50 ℃, and then curing for 30min at the temperature of 135 ℃ to finish curing; wherein, a plate type induction heater is adopted; the distance between the plate type induction heater and the surface of the steel belt die is 11.0 cm;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
Example 3
Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe
The method comprises the steps of raw material preparation, continuous winding of a glass fiber reinforced plastic inner lining layer and a glass fiber reinforced plastic structure layer, curing and shaping, and cutting;
the method comprises the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing flexible unsaturated polyester resin, an auxiliary agent, an initiator and cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 3min to obtain a glass fiber reinforced plastic inner liner mixture; wherein, the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride group; the mass ratio of the flexible unsaturated polyester resin to the auxiliary agent to the initiator to the cyclohexanone peroxide dibutyl phthalate paste is 10: 0.2: 0.05: 0.3; the auxiliary agent is prepared from the following components in percentage by mass of 1: 3.5 composition of nano-silica and ultrafine calcium carbonate; the initiator is prepared from the following components in a mass ratio of 0.6: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
Step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body; the thickness of the glass fiber reinforced plastic lining layer is 2.0mm, and the thickness of the glass fiber reinforced plastic structural layer is 20 mm;
step III, curing and shaping: preheating the formed pipeline body in the step II for 6min at the temperature of 46 ℃, and then curing for 22min at the temperature of 105 ℃ to finish curing; wherein, a plate type induction heater is adopted; the distance between the plate type induction heater and the surface of the steel belt die is 9.5 cm;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
Example 4
Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe
The method comprises the steps of raw material preparation, continuous winding of a glass fiber reinforced plastic inner lining layer and a glass fiber reinforced plastic structure layer, curing and shaping, and cutting;
the method comprises the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing flexible unsaturated polyester resin, an auxiliary agent, an initiator and cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 4min to obtain a glass fiber reinforced plastic inner liner mixture; wherein, the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride group; the mass ratio of the flexible unsaturated polyester resin to the auxiliary agent to the initiator to the cyclohexanone peroxide dibutyl phthalate paste is 10: 1.2: 0.09: 0.3; the auxiliary agent is prepared from the following components in percentage by mass of 1: 4.5 composition of nano-silica and ultrafine calcium carbonate; the initiator is prepared from the following components in a mass ratio of 0.5: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
Step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body; the thickness of the glass fiber reinforced plastic lining layer is 3.0mm, and the thickness of the glass fiber reinforced plastic structural layer is 45 mm;
step III, curing and shaping: preheating the formed pipeline body in the step II for 9min at the temperature of 49 ℃, and then curing for 28min at the temperature of 130 ℃ to finish curing; wherein, a plate type induction heater is adopted; the distance between the plate type induction heater and the surface of the steel belt die is 10.5 cm;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
Example 5
Preparation method of impact-resistant strain-corrosion-resistant continuous winding glass reinforced plastic pipe
The method comprises the steps of raw material preparation, continuous winding of a glass fiber reinforced plastic inner lining layer and a glass fiber reinforced plastic structure layer, curing and shaping, and cutting;
the method comprises the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing flexible unsaturated polyester resin, an auxiliary agent, an initiator and cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 3min to obtain a glass fiber reinforced plastic inner liner mixture; wherein, the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride group; the mass ratio of the flexible unsaturated polyester resin to the auxiliary agent to the initiator to the cyclohexanone peroxide dibutyl phthalate paste is 10: 0.4: 0.08: 0.3; the auxiliary agent is prepared from the following components in percentage by mass of 1: 4 of nano silica and ultrafine calcium carbonate; the initiator is prepared from the following components in a mass ratio of 0.5: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
Step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body; the thickness of the glass fiber reinforced plastic lining layer is 2.5mm, and the thickness of the glass fiber reinforced plastic structural layer is 30 mm;
step III, curing and shaping: preheating the formed pipeline body in the step II for 8min at the temperature of 48 ℃, and then curing for 25min at the temperature of 125 ℃ to finish curing; wherein, a plate type induction heater is adopted; the distance between the plate type induction heater and the surface of the steel belt die is 10.0 cm;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
The present invention will be described in further detail with reference to the following drawings, wherein the heater is a heater for continuously winding a glass fiber reinforced plastic pipe with impact resistance and strain corrosion resistance:
the curing heater consists of a continuously wound glass steel tube 1, a plate type induction heater 2, a steel strip die 3 and an infrared heater 4, wherein the plate type induction heater 2 is arranged outside the continuously wound glass steel tube 1 to form the shape shown in the figure. The working principle is as follows: the steel belt die 3 is heated through the plate-type inductor 2, the inner liner layer continuously winding the glass steel tube 1 is heated, and meanwhile, the infrared heater 4 is assisted, so that the curing efficiency of resin is improved.
Examples of the experiments
To further illustrate the improvement of the preparation method of the impact-resistant, strain-corrosion-resistant and continuously-wound glass fiber reinforced plastic pipe, the impact-resistant, strain-corrosion-resistant and continuously-wound glass fiber reinforced plastic pipe prepared in the embodiments 1 to 5 of the present invention is subjected to a ring bending constant deformation sulfuric acid strain corrosion test according to the GB/T21238 standard, and the results of the experimental data are compared in the following table 1:
TABLE 1 impact, strain corrosion resistant continuously wound FRP pipe test data prepared in accordance with the present invention
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example | |
| Wall thickness (mm) | 8.65 | 8.72 | 8.76 | 8.66 | 8.62 | 9.06 |
| Length (mm) | 289.5 | 289.6 | 289.4 | 289.0 | 289.2 | 299.8 |
| Calculating diameter (mm) | 506.05 | 506.10 | 506.15 | 506.02 | 506.03 | 506.44 |
| Ring stiffness (N/m)2) | 6285 | 6278 | 6289 | 6288 | 6282 | 7350 |
| Constant deflection (mm) | 89.7 | 89.6 | 89.5 | 89.8 | 89.7 | 85.0 |
| Dependent variable (%) | 0.0109 | 0.0108 | 0.0106 | 0.0109 | 0.0107 | 0.0109 |
| Time to failure (h) | 1950 | 1962 | 1958 | 1960 | 1964 | 45.2 |
Remarking: the comparative example is a conventional resin liner.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of an impact-resistant and strain-corrosion-resistant continuously-wound glass reinforced plastic pipe comprises the steps of raw material preparation, continuous winding of a glass reinforced plastic inner liner layer and a glass reinforced plastic structure layer, curing and shaping, and cutting; the method is characterized by comprising the following specific steps:
step I, raw material preparation: respectively preparing a glass fiber reinforced plastic inner liner layer mixture and a glass fiber reinforced plastic structure layer material for later use;
step II, continuous winding: sequentially winding the glass fiber reinforced plastic lining layer mixture and the glass fiber reinforced plastic structure layer material in the step I on a steel belt die through a pipeline winding system to form a glass fiber reinforced plastic lining layer and a glass fiber reinforced plastic structure layer, and obtaining a formed pipeline body;
step III, curing and shaping: curing the formed pipeline body in the step II for 20-30 min at the temperature of 75-135 ℃ to finish curing;
step IV, cutting: and cutting the pipeline body cured in the step III to obtain the shock-resistant strain-corrosion-resistant continuously-wound glass steel pipe.
2. The preparation method of claim 1, wherein in the step I, the preparation method of the glass fiber reinforced plastic inner liner mixture comprises the following steps: mixing the flexible unsaturated polyester resin, the auxiliary agent, the initiator and the cyclohexanone peroxide dibutyl phthalate paste, and fully stirring for 1-5 min to obtain the glass fiber reinforced plastic inner liner mixture, wherein the molecular chain of the flexible unsaturated polyester resin contains tetrahydrophthalic anhydride groups.
3. The preparation method according to claim 2, wherein the mass ratio of the flexible unsaturated polyester resin to the auxiliary agent to the initiator to the cyclohexanone peroxide dibutyl phthalate paste is 10: 0-1.6: 0.03-0.1: 0.3.
4. the preparation method according to claim 2, wherein the auxiliary agent is a mixture of the following components in a mass ratio of 1: 3-5 of a composition of nano silicon dioxide and superfine calcium carbonate.
5. The preparation method according to claim 2, wherein the initiator is added in an amount of 0.5-0.6 by mass: 5 tetraethylene glycol diacrylate and cobalt naphthenate styrene.
6. The preparation method of claim 1, wherein in the step II, the thickness of the glass fiber reinforced plastic lining layer is 1.2-3.5 mm, and the thickness of the glass fiber reinforced plastic structural layer is 15-45 mm.
7. The method according to claim 1, wherein in step III, the molded tube is preheated at a temperature of 45 to 50 ℃ for 5 to 10min before the curing.
8. The method according to claim 1, wherein in step III, a plate-type induction heater is used for the curing.
9. The method of claim 8, wherein the plate-type induction heater is located at a distance of 9.0cm to 11.0cm from the surface of the steel strip mold.
10. The solidification heater of impact-resistant and strain-corrosion-resistant continuously wound FRP pipe as claimed in any one of claims 1 to 9, wherein the solidification heater comprises a continuously wound FRP pipe, a plate type induction heater, a steel belt die and an infrared heater, and the plate type induction heater is arranged outside the continuously wound FRP pipe.
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