CN112696535A - Prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe - Google Patents

Prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe Download PDF

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Publication number
CN112696535A
CN112696535A CN202011579977.5A CN202011579977A CN112696535A CN 112696535 A CN112696535 A CN 112696535A CN 202011579977 A CN202011579977 A CN 202011579977A CN 112696535 A CN112696535 A CN 112696535A
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CN
China
Prior art keywords
pipe
layer
heat
composite
polypropylene
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Pending
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CN202011579977.5A
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Chinese (zh)
Inventor
林世平
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Shanghai Yingtai Plastic Ltd By Share Ltd
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Shanghai Yingtai Plastic Ltd By Share Ltd
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Priority to CN202011579977.5A priority Critical patent/CN112696535A/en
Publication of CN112696535A publication Critical patent/CN112696535A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/14Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001Combinations of extrusion moulding with other shaping operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02Welded joints; Adhesive joints
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04Coatings characterised by the materials used
    • F16L58/10Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
    • F16L58/1036Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the coating being a preformed pipe
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/02Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028Composition or method of fixing a thermally insulating material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/02Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/04Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/10Bandages or covers for the protection of the insulation, e.g. against the influence of the environment or against mechanical damage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/12Arrangements for supporting insulation from the wall or body insulated, e.g. by means of spacers between pipe and heat-insulating material; Arrangements specially adapted for supporting insulated bodies
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/16Rigid pipes wound from sheets or strips, with or without reinforcement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/22Tubes or pipes, i.e. rigid

Abstract

The invention provides a prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe. The tubular product includes outer jacket, heat preservation, support, working tube, protecting pipe, the outer jacket is made by high density polyethylene, the heat preservation is reinforcing polyurethane heat preservation, the support is the hollow wooden or plastics hollow ring support of fretwork that the interval is 1000 ~ 1500mm, the working tube includes high heat-resisting high-modulus polypropylene inner tube 4-1, continuous fibers preimpregnation area reinforcing sandwich layer, the outer pipe of polypropylene, the protecting pipe is the sleeve pipe of being made by the polyethylene material. The pipe has strong corrosion resistance, high pressure resistance and high temperature resistance, effectively prolongs the service life of a pipeline system, enables the pipe to keep high rigidity at the temperature of 70-130 ℃, ensures that a heat-insulating layer has good pressure resistance, wear resistance and heat-insulating effect, and has good application prospect.

Description

Prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe
Technical Field
The invention relates to the technical field of prefabricated heat-insulation working pipes, in particular to a prefabricated heat-insulation continuous glass fiber prepreg tape reinforced pipe.
Background
At present, in order to prevent the steel pipe from being corroded by hot water in the pipe during hot water operation in winter, the inner wall of a steel pipe working pipe for conveying a hot water pipe network is generally corroded by a coloring agent and oxygen added in the hot water; the steel pipe is operated in hot water for a long time, particularly in the empty pipe period in summer, the steel pipe is affected by air entering the pipe, the rust corrosion of the inner wall of the steel pipe is serious, and rusted solid particles block elbows, tee joints, indoor floor heating pipe networks and the like in the line, so that the heating effect is affected. Meanwhile, the pipeline is damaged due to corrosion, so that the problems of pipeline leakage, serious water loss and the like are easily caused, and a lot of unnecessary loss is caused. During the period of water cut-off in summer, because the leakage of the valve body leads to the hollow pipe in the pipe, the humid air enters the pipe network for a long time, further corrosion is caused to the pipe wall, and the service life of the pipe network is seriously influenced. In the whole life cycle of a 70-year building, the pipe network is generally required to be replaced for 5 times, so that great waste of manpower and material resources is caused. In addition, because the self heat conductivity coefficient of the steel pipe is large, and the effect of the outer heat insulation material of the pipeline is gradually lost along with the time extension, 50 percent of heat value is wasted in the heat and hot water conveying process, and serious energy waste is caused. At present, the underground and overground heat pipe networks of the houses with about 260 hundred million square meters currently in China all adopt the material as working pipes.
In order to solve the problems that the steel pipe is corroded, the pipeline is blocked, the heating effect is poor, the pipeline loses water for a long time and the like, a pure plastic heat-resistant polyolefin pipeline (PE-RT) and a polypropylene pipeline (PP-R) are adopted to replace the steel pipe to be used as a heat-insulation working pipe in the prior art. However, when the existing material for replacing the steel plastic pipe is used in a high-temperature water environment with the temperature of more than or equal to 80 ℃, the following problems generally exist in a common plastic pipe: the self heat resistance is poor, and the requirement of long-term conveying of high-temperature media with the temperature of more than 80 ℃ on the temperature cannot be met; the pressure resistance is poor, and the use requirement of high pressure which is more than the working pressure PN which is more than or equal to 1.0MPa cannot be met under the high-temperature hot water environment; the rigidity is poor, and the use requirement of the rigidity under the environment conditions of 100mm diameter and more than 70 ℃ can not be met. The polyurethane foaming thermal insulation material has the following problems: the self compressive strength is low, and the problems of compaction, fracturing, deformation and the like can occur under the superposition of temperature and weight pressure, so that the heat preservation effect is reduced and even loses efficacy; under the action of temperature difference of a thermal power hot water pipe network, the phenomenon of expansion with heat and contraction with cold moving can occur to a built-in steel pipe or a thermoplastic composite pipe, the outer layer of the steel pipe or the thermoplastic composite pipe is restrained into a fixed whole by the coated earthwork including a polyurethane heat-insulating layer, and the fragile polyurethane material can be ground under the action of pipeline pressure and friction stress of the heat-insulating layer, so that the whole heat-insulating effect is lost.
The continuous fiber prepreg tape reinforced composite pipe has the advantages that due to the existence of the pipe end wound on the fiber core layer and the composite transition layer between the core layer and the inner and outer layer plastics, the phenomenon of a relief layer can be caused by flaws in the product processing process and stretching in the inner layer cold contraction process, and the fluid medium in the pipe enters the relief layer to cause the joint of the composite pipe to lose efficacy.
Therefore, the development of the novel thermoplastic composite pipeline which can obviously improve the self corrosion resistance, high pressure resistance and high temperature resistance of the pipeline system, has safe pipeline interfaces and long service life of the pipeline system, can keep higher rigidity at the temperature of 70-130 ℃, and simultaneously ensures that the heat-insulating layer has good pressure resistance, wear resistance and heat-insulating effect has important significance.
Disclosure of Invention
In order to solve the problems, the invention provides a prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipeline which is sequentially provided with an outer protective layer 1, a heat-preservation layer 2, a bracket 3 and a working pipeline 4 from outside to inside, wherein the outer protective layer 1 is made of high-density polyethylene and is wrapped on the outer wall of the heat-preservation layer; the heat-insulating layer 2 is coated on the outer wall of the working pipe 4 by a reinforced polyurethane heat-insulating layer made of nano calcium carbonate composite polyurethane with the weight ratio of 2-3%; the bracket 3 is a hollow wooden or plastic hollow circular ring bracket with the distance of 1000-1500 mm, and plays a role in supporting the outer protective layer; the working pipeline 4 comprises a composite pipe A consisting of a polypropylene inner layer pipe 4-1, a continuous fiber prepreg tape radial and axial reinforcing core layer 4-2 and a polypropylene outer layer pipe 4-3 which are modified and reinforced, a composite pipe joint B made of the composite pipe and pipe fittings of the same quality, and a composite pipeline melt joint C, wherein the composite pipe joint B consists of a socket formed by an upper step B1 of a pipe end and a lower step B2 of the pipe end and a composite pipe section A', and the composite pipeline melt joint C is made by hot melting or electric melting a C1 socket and a C2 socket formed by inserting the upper step socket and the lower step socket of the port of the composite pipe A into the upper step socket and the lower step socket of the pipe end of the composite pipe joint B.
Further, the polypropylene inner layer pipe 4-1 contains 10-30 wt% of talcum powder modified body, and is extruded into melt by a single screw extruder at 160-230 ℃, and the melt is formed and cut by a sizing sleeve vacuum box and a cooling water tank.
Further, the modified talcum powder is obtained by compounding a coupling agent of silane and titanate and carrying out surface modification treatment under the condition of 1000-1500 r/min.
Further, mixing the modified talcum powder with polypropylene plastic according to the ratio of 6-8: 4-2, extruding and granulating at 160-230 ℃ in double-screw extrusion to prepare modified talcum powder master batch, mixing, adding and dispersing the modified talcum powder master batch into the polypropylene material.
Furthermore, the reinforcing core layer 4-2 is formed by multi-level lap winding of continuous fiber prepreg tapes at a winding angle of 50-55 degrees of an X axis in the advancing direction to form a reinforcing layer pipe which is fused and adhered to the outer wall of the inner plastic pipe.
The invention also provides a manufacturing method of the prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe, which comprises the following steps:
1) modifying talcum powder into master batches, uniformly stirring the master batches with a PP-HM plastic material according to a certain proportion, and then filling the master batches into a charging barrel of an inner-layer extruder;
2) starting an inner layer extruder to extrude the composite plastic melt, and manufacturing an inner layer pipe 4-1 through vacuum spraying water cooling and shaping;
3) starting a plurality of groups of prepreg tape winding disks, heating the prepreg tapes to be in a molten state with the surface layer of the inner-layer pipe, winding the prepreg tapes in a multi-layer manner at an inclination angle of 40-65 degrees, and fusing and sticking the prepreg tapes on the outer wall of the inner-layer pipe 4-1 to form a reinforced core layer pipe 4-2 made of continuous fiber prepreg tape winding layers formed by axially and obliquely laying;
4) starting an outer layer pipe extruder, and coating the basic outer layer polypropylene melt on the outer wall of the reinforced core layer 4-2 pipe to prepare a polypropylene outer layer pipe 4-3;
5) fixing the support 3 on the outer wall of the polypropylene outer layer pipe 4-3 according to a set interval;
6) the polyethylene outer protective layer pipe 1 is sleeved on the outer layer of the bracket 3, and the two ends of the polyethylene outer protective layer pipe are blocked to form a cavity body;
7) after the nano calcium carbonate and the polyurethane liquid are uniformly stirred, a polyurethane solution conveyor is used for pressing into the cavity and foaming, so that the nano calcium carbonate composite polyurethane thermal insulation layer pipe 2 is prepared.
Further, the weight percentage of the talc powder modified master batch in the step 1) to the PP-HM plastic material is 10-30%: 90-70%.
The invention adopts the thermoplastic composite pipeline to replace a steel pipe, thereby solving the corrosion resistance problem of the pipeline in the prior art; the high-temperature-resistant reinforced modified polypropylene is adopted to replace common PERT and PPR materials, so that the long-term heat resistance of the inner-layer plastic working pipe is improved, and the use requirement of the high-temperature resistance of a heating power primary-secondary pipe network is met; the high-strength heat-resistant continuous fiber prepreg tape is wound on the outer wall of the inner-layer pipe to enhance the radial stress resistance and the axial stress resistance of the core layer of the working pipe, so that the high-pressure resistant use requirement on the pipe is met; the pipe joint is made of the pipe fittings with the same quality as the composite pipe, so that the requirements of the pipe fittings with the same quality and the same service life in the 70-year whole service life cycle of the pipeline are met; by adopting the double-layer hot-melting socket joint connecting pipeline joint technology, the sealing pipe end is blocked to prevent medium in the pipe from entering the pipe layer to cause the failure of the pipeline joint, and the welding area of the bell mouth is increased to improve the axial tensile stress resistance of the bell mouth.
According to the invention, the wooden or plastic hollow circular ring is used as the support, so that the polyurethane material can flow in the hollow part of the support, and the good heat insulation effect of the pipe is ensured. Meanwhile, the invention also adopts the talcum powder modified body to reinforce the polypropylene inner-layer pipe, so that the mechanical property of the polypropylene inner-layer pipe is obviously improved, the microcard softening point of the reinforced polypropylene inner-layer pipe reaches 157-165 ℃, the bending elastic modulus reaches 1800-2100 MPa, and the heat resistance, rigidity and thermal change temperature point of the inner-layer pipe are improved. Finally, the invention improves the tensile strength of the axis by adjusting the winding angle of the winding layer of the continuous fiber prepreg tape. When the method is adopted to prepare the continuous fiber prepreg tape reinforced core layer, the smaller the winding angle is, the smaller the axial deformation of the pipeline after being heated by stress is, and in order to ensure that the prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe can normally work for a long time at higher temperature and pressure, the smaller winding angle is adopted to improve the stability of the pipeline.
Compared with the prior art, the invention has the beneficial technical effects that:
(1) the invention adopts the polypropylene plastic with long-term corrosion resistance as the inner layer pipe, greatly improves the self-corrosion resistance of the pipeline system and obviously prolongs the service life of the pipe.
(2) According to the invention, the polypropylene plastic modified by the inorganic material with the high micro-calorie softening point of 157-165 ℃ is used as the inner layer pipe, so that the heat resistance of a pipeline system is greatly improved, and the modified pipeline can be used for a long time in an environment with the temperature of 130 ℃.
(3) According to the invention, the high-modulus polypropylene plastic is modified by an inorganic material to be used as the inner-layer pipe, so that a pipeline system made of the pipe can keep higher rigidity at the temperature of 70-130 ℃.
(4) According to the invention, the high-strength 0-45-degree continuous pre-impregnated rhombic belt is used as a method for enhancing the radial and axial stress resistance, so that the high-pressure resistance and high-temperature resistance of the pipeline are greatly improved, the axial stress resistance of the pipeline is improved, the linear expansion coefficient of the pipeline is reduced, and the stability of the radial and axial dimensions of the pipeline in the presence of temperature and pressure is further realized.
(5) According to the invention, the polyurethane thermal insulation material is enhanced by adopting the nano-scale particle solid, so that the overall strength of the compound thermal insulation material is greatly improved, the compressive strength and the wear-resistant strength of the thermal insulation body are improved, and the pressure-resistant, wear-resistant and thermal insulation effects of the pipe thermal insulation layer are further ensured.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a structural diagram of a prefabricated heat-insulating continuous glass fiber prepreg tape pipe of the invention;
FIG. 2 is a structural diagram of a working pipe of the prefabricated heat-insulating continuous glass fiber prepreg tape pipe of the invention;
FIG. 3 is a composite pipe joint B of the prefabricated heat-insulating continuous glass fiber prepreg tape pipe of the present invention;
FIG. 4 is a composite fusion splice C of the prefabricated insulated continuous glass fiber prepreg tape tubing of the present invention.
Description of reference numerals: 1. an outer protecting pipe; 2. a heat-insulating layer; 3. a support; 4. a working pipe; 4-1, high heat-resistant high-modulus polypropylene inner-layer pipe; 4-2, reinforcing the core layer by using a continuous fiber prepreg tape; 4-3, polypropylene outer layer pipes; a', a composite pipe section; B. a composite pipe joint; b1, pipe end upper step; b2, pipe end downsteping; c1, socket; c2, socket.
Detailed Description
The invention provides a prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipeline which is sequentially provided with an outer protective layer 1, a heat-preservation layer 2, a bracket 3 and a working pipeline 4 from outside to inside, wherein the outer protective layer 1 is made of high-density polyethylene and is wrapped on the outer wall of the heat-preservation layer; the heat-insulating layer 2 is coated on the outer wall of the working pipe 4 by a reinforced polyurethane heat-insulating layer made of nano calcium carbonate composite polyurethane with the weight ratio of 2-3%; the bracket 3 is a hollow wooden or plastic hollow circular ring bracket with the distance of 1000-1500 mm, and plays a role in supporting the outer protective layer; the working pipeline 4 comprises a composite pipe A consisting of a polypropylene inner layer pipe 4-1, a continuous fiber prepreg tape radial and axial reinforcing core layer 4-2 and a polypropylene outer layer pipe 4-3 which are modified and reinforced, a composite pipe joint B made of the composite pipe and pipe fittings of the same quality, and a composite pipeline melt joint C, wherein the composite pipe joint B consists of a socket formed by an upper step B1 of a pipe end and a lower step B2 of the pipe end and a composite pipe section A', and the composite pipeline melt joint C is made by hot melting or electric melting a C1 socket and a C2 socket formed by inserting the upper step socket and the lower step socket of the port of the composite pipe A into the upper step socket and the lower step socket of the pipe end of the composite pipe joint B.
In one embodiment, the polypropylene inner layer pipe 4-1 contains 10-30 wt% of talc powder modifier, and is extruded into melt by a single screw extruder at 160-230 ℃, and the melt is formed and cut by a sizing sleeve vacuum box and a cooling water box.
In one embodiment, the modified talcum powder is obtained by compounding a coupling agent of silane and titanate and carrying out surface modification treatment under the condition of 1000-1500 r/min.
In one embodiment, the talcum powder modified body and polypropylene plastic are mixed according to the ratio of 6-8: 4-2, extruded and granulated at 160-230 ℃ in double-screw extrusion to prepare talcum powder modified master batch, and the talcum powder modified master batch is mixed, added and dispersed in the polypropylene material.
In one embodiment, the reinforcing core layer 4-2 is formed by multi-layer lap winding of continuous fiber prepreg tapes at a winding angle of 50-55 degrees on an X axis in an advancing direction to form a reinforcing layer pipe which is welded on the outer wall of the inner plastic pipe.
The invention also provides a manufacturing method of the prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe, which comprises the following steps:
1) modifying talcum powder into master batches, uniformly stirring the master batches with a PP-HM plastic material according to a certain proportion, and then filling the master batches into a charging barrel of an inner-layer extruder;
2) starting an inner layer extruder to extrude the composite plastic melt, and manufacturing an inner layer pipe 4-1 through vacuum spraying water cooling and shaping;
3) starting a plurality of groups of prepreg tape winding disks, heating the prepreg tapes to be in a molten state with the surface layer of the inner-layer pipe, winding the prepreg tapes in a multi-layer manner at an inclination angle of 40-65 degrees, and fusing and sticking the prepreg tapes on the outer wall of the inner-layer pipe 4-1 to form a reinforced core layer pipe 4-2 made of continuous fiber prepreg tape winding layers formed by axially and obliquely laying;
4) starting an outer layer pipe extruder, and coating the basic outer layer polypropylene melt on the outer wall of the reinforced core layer 4-2 pipe to prepare a polypropylene outer layer pipe 4-3;
5) fixing the support 3 on the outer wall of the polypropylene outer layer pipe 4-3 according to a set interval;
6) the polyethylene outer protective layer pipe 1 is sleeved on the outer layer of the bracket 3, and the two ends of the polyethylene outer protective layer pipe are blocked to form a cavity body;
7) after the nano calcium carbonate and the polyurethane liquid are uniformly stirred, a polyurethane solution conveyor is used for pressing into the cavity and foaming, so that the nano calcium carbonate composite polyurethane thermal insulation layer pipe 2 is prepared.
In one embodiment, the weight ratio of the talc powder modified masterbatch in the step 1) to the PP-HM plastic material is 1-3: 9 to 7.
The invention adopts the polypropylene plastic with long-term corrosion resistance as the inner layer pipe, thus greatly prolonging the self corrosion resistance and the long-term service life of the pipeline system; the polypropylene plastic modified by the inorganic material with the high micro-calorie softening point of 157-165 ℃ is used as the inner layer pipe, so that the heat resistance of a pipeline system is greatly improved, and the modified pipeline can be used for a long time in the environment of 130 ℃; the high-modulus polypropylene plastic and the inorganic material are modified to be used as the inner layer pipe, so that a pipeline system made of the pipe material prepared by the method can keep higher rigidity at the temperature of 70-130 ℃; the high-strength continuous prepreg tape is used as a method for enhancing the radial and axial stress resistance, so that the high pressure resistance and high temperature resistance of the pipeline are greatly improved, and the stability of the pipeline is improved; the flocculent fiber tows are adopted to reinforce the polyurethane thermal insulation material, so that the overall strength of the compound thermal insulation material is greatly improved, the compressive strength and the wear-resistant strength of the thermal insulation body are improved, and then the pressure-resistant wear-resistant thermal insulation effect of the pipe thermal insulation layer is ensured.
The following will further illustrate the prefabricated heat-insulating continuous glass fiber prepreg tape reinforced pipe provided by the invention with reference to the examples.
Example 1
A prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipeline is sequentially provided with an outer protective layer 1, a heat-preservation layer 2, a bracket 3 and a working pipeline 4 from outside to inside, wherein the outer protective layer 1 is made of high-density polyethylene and is wrapped on the outer wall of the heat-preservation layer; the heat-insulating layer 2 is coated on the outer wall of the working pipe 4 by a reinforced polyurethane heat-insulating layer made of nano calcium carbonate composite polyurethane with the weight ratio of 2%; the bracket 3 is a hollow wood or plastic hollow circular ring bracket with the distance of 1000mm, and plays a role in supporting the outer protective layer; the working pipeline 4 comprises a composite pipe A consisting of a polypropylene inner layer pipe 4-1, a continuous fiber prepreg tape radial and axial reinforcing core layer 4-2 and a polypropylene outer layer pipe 4-3 which are modified and reinforced, a composite pipe joint B made of the composite pipe and pipe fittings of the same quality, and a composite pipeline melt joint C, wherein the composite pipe joint B consists of a socket formed by an upper step B1 of a pipe end and a lower step B2 of the pipe end and a composite pipe section A', and the composite pipeline melt joint C is made by hot melting or electric melting a C1 socket and a C2 socket formed by inserting the upper step socket and the lower step socket of the port of the composite pipe A into the upper step socket and the lower step socket of the pipe end of the composite pipe joint B.
The polypropylene inner-layer tube 4-1 contains 30 wt% of talcum powder master batch and 70 wt% of polypropylene material, the talcum powder master batch and the polypropylene material are uniformly stirred, extruded into a melt through a single-screw extruder at 180-220 ℃, and formed and cut through a sizing sleeve vacuum box and a cooling water tank.
The modified talcum powder is prepared by compounding silane and titanate with a coupling agent and performing surface modification treatment at normal temperature of 800 r/min.
The modified talcum powder and polypropylene plastic are uniformly mixed according to the proportion of 6:4, extruded and granulated at 200 ℃ in double-screw extrusion to prepare modified talcum powder master batch, and the modified talcum powder master batch is mixed, added and dispersed in the polypropylene material.
In one embodiment, the reinforcing core layer 4-2 is formed by multi-layer lap winding of continuous fiber prepreg tapes at a winding angle of 50 degrees from an X axis in an advancing direction to form a reinforcing layer tube, and the reinforcing layer tube is welded on the outer wall of the inner plastic tube.
The manufacturing method of the prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe comprises the following steps:
1) modifying talcum powder into master batches, uniformly stirring the master batches and the PP-HM plastic material according to the weight ratio of 2:8, and then filling the master batches into a charging barrel of an inner-layer extruder;
2) starting an inner layer extruder to extrude the composite plastic melt, and manufacturing an inner layer pipe 4-1 through vacuum spraying water cooling and shaping;
3) starting a plurality of groups of prepreg tape winding disks, heating the prepreg tapes to be in a molten state with the surface layer of the inner-layer pipe, winding the prepreg tapes in a multi-layer manner at an inclination angle of 50 degrees, and fusing and sticking the prepreg tapes on the outer wall of the inner-layer pipe 4-1 to form a reinforced core layer pipe 4-2 made of continuous fiber prepreg tape winding layers which are laid in an axial direction in an inclined manner;
4) starting an outer layer pipe extruder, and coating the basic outer layer polypropylene melt on the outer wall of the reinforced core layer 4-2 pipe to prepare a polypropylene outer layer pipe 4-3;
5) fixing the support 3 on the outer wall of the polypropylene outer layer pipe 4-3 according to a set interval;
6) the polyethylene outer protective layer pipe 1 is sleeved on the outer layer of the bracket 3, and the two ends of the polyethylene outer protective layer pipe are blocked to form a cavity body;
7) after the nano calcium carbonate and the polyurethane liquid are uniformly stirred, a polyurethane solution conveyor is used for pressing into the cavity and foaming, so that the nano calcium carbonate composite polyurethane thermal insulation layer pipe 2 is prepared.
The continuous fiber prepreg tape is a commercially available product.
The polypropylene outer layer pipe 4-3 and the polypropylene inner layer pipe 4-1 are made of the same material and are coated on the outer wall of the reinforced core layer 4-2 through melt extrusion.
The polyurethane material is commercially available.
The nano calcium carbonate is purchased from products in the market.
The composite pipe and the composite pipe joint can meet the requirements of hydrostatic tests at 130 ℃, 2.0MPa, 1000 hours, 95 ℃, 3.0MPa and 1000 hours.
The pipeline interface formed by the composite pipe and the composite pipe joint can meet the requirements of hydrostatic tests at 130 ℃, 2.0MPa, 1000 hours, 95 ℃, 3.0MPa, 1000 hours, 23 ℃, 6.0MPa and 1 hour.
Test example 1
The various properties of the prefabricated heat-insulating continuous glass fiber prepreg tape reinforced pipeline obtained in the example 1 are measured, and the detection method and the detection result are as follows:

Claims (7)

1. the utility model provides a prefabricated heat preservation continuous glass fiber preimpregnation area reinforcing pipeline, its by outer jacket (1), heat preservation (2), support (3), working pipeline (4) that have set gradually to interior, its characterized in that: the outer protective layer (1) is made of high-density polyethylene and wrapped on the outer wall of the heat insulation layer; the heat-insulating layer (2) is coated on the outer wall of the working pipe (4) by a reinforced polyurethane heat-insulating layer made of nano calcium carbonate composite polyurethane with the weight ratio of 2-3%; the support (3) is a hollow wood or plastic hollow circular ring support with the distance of 1000-1500 mm, and plays a role in supporting the outer protection layer; the working pipeline (4) comprises a composite pipe (A) which is formed by a modified reinforced polypropylene inner layer pipe (4-1) with high heat resistance, high modulus and high toughness, a continuous fiber prepreg tape radial and axial reinforcing core layer (4-2) and a polypropylene outer layer pipe (4-3), a composite pipe joint (B) which is made of the composite pipe and a pipe fitting with the same quality, and a composite pipeline fusion joint C, wherein the composite pipe joint (B) comprises a socket and a composite pipe section (A') which are formed by an upper step (B1) and a lower step (B2) of a pipe end, and the composite pipeline fusion joint C is formed by inserting the upper step socket and the lower step of the pipe end of the composite pipe (A) into the upper step socket and the lower step socket of the pipe end of the composite pipe joint (B) through hot melting or electric melting to form the socket (C1) and the socket (C2.
2. The prefabricated insulated continuous glass fiber prepreg tape reinforced pipe of claim 1, wherein: the polypropylene inner layer pipe (4-1) contains 10-30 wt% of talcum powder modification, and is extruded into melt by a single screw extruder at 160-230 ℃, and the melt is formed and cut by a sizing sleeve vacuum box and a cooling water tank.
3. The prefabricated insulated continuous glass fiber prepreg tape reinforced pipe as claimed in claim 2, wherein: the modified talcum powder is obtained by carrying out surface modification treatment on a silane and titanate compound coupling agent under the condition of 1000-1500 r/min.
4. The prefabricated insulated continuous glass fiber prepreg tape reinforced pipe as claimed in claim 2, wherein: mixing the modified talcum powder with polypropylene plastic according to the proportion of 6-8: 4-2, extruding and granulating at 160-230 ℃ in twin-screw extrusion to prepare modified talcum powder master batch, mixing, adding and dispersing the modified talcum powder master batch into the polypropylene material.
5. The prefabricated insulated continuous glass fiber prepreg tape reinforced pipe of claim 1, wherein: the reinforced core layer (4-2) is formed by multilayer overlapping and winding of continuous fiber prepreg tapes at a winding angle of 50-55 degrees on an X axis in the advancing direction to form a reinforced layer pipe which is fused and adhered to the outer wall of the inner plastic pipe.
6. The method for manufacturing the prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe material according to claim 1, is characterized by comprising the following steps of:
1) modifying talcum powder into master batches, uniformly stirring the master batches with a PP-HM plastic material according to a certain proportion, and then filling the master batches into a charging barrel of an inner-layer extruder;
2) opening an inner layer extruder to extrude the composite plastic melt, and manufacturing an inner layer pipe (4-1) through vacuum spray water cooling and shaping;
3) starting a plurality of groups of prepreg tape winding disks, heating the prepreg tapes to be in a molten state with the surface layer of the inner-layer pipe, winding the prepreg tapes in a multi-layer manner at an inclination angle of 40-65 degrees, and fusing and sticking the prepreg tapes on the outer wall of the inner-layer pipe (4-1) to form a reinforced core layer pipe (4-2) made of continuous fiber prepreg tape winding layers which are laid in an axial and oblique manner;
4) starting an outer layer pipe extruder, and coating the basic outer layer polypropylene melt on the outer wall of the reinforced core layer (4-2) pipe to prepare a polypropylene outer layer pipe (4-3);
5) fixing the brackets (3) on the outer wall of the polypropylene outer layer pipe (4-3) according to a set interval;
6) the outer polyethylene protective layer pipe (1) is sleeved on the outer layer of the bracket (3), and the two ends of the outer polyethylene protective layer pipe are plugged to form a cavity body;
7) and (3) uniformly stirring the nano calcium carbonate and the polyurethane liquid, pressing the nano calcium carbonate and the polyurethane liquid into the cavity by using a polyurethane solution conveyor, and foaming to prepare the nano calcium carbonate composite polyurethane heat-insulating layer pipe (2).
7. The manufacturing method of the prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe material as claimed in claim 6, wherein the weight ratio of the talc powder modified masterbatch in the step 1) to the PP-HM plastic material is 1-3%: 9 to 7.
CN202011579977.5A 2020-12-28 2020-12-28 Prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe Pending CN112696535A (en)

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Application Number Priority Date Filing Date Title
CN202011579977.5A CN112696535A (en) 2020-12-28 2020-12-28 Prefabricated heat-preservation continuous glass fiber prepreg tape reinforced pipe

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