CN110534867B - High-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome and production process thereof - Google Patents
High-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome and production process thereof Download PDFInfo
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- CN110534867B CN110534867B CN201810527436.4A CN201810527436A CN110534867B CN 110534867 B CN110534867 B CN 110534867B CN 201810527436 A CN201810527436 A CN 201810527436A CN 110534867 B CN110534867 B CN 110534867B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1242—Rigid masts specially adapted for supporting an aerial
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/06—Unsaturated polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The invention relates to the field of antenna covers, in particular to a high-wave-transmission high-strength carbon fiber glass fiber composite glass fiber reinforced plastic antenna cover and a production process thereof, wherein the antenna cover comprises an installation base for being installed on a wall, a protective cover capable of being opened and closed and arranged outside the installation base, and an antenna holding rod positioned in a cavity formed by enclosing the installation base and the protective cover, wherein a glass fiber reinforced plastic base layer comprises 50-80 parts by mass of unsaturated polyester resin, 5-20 parts by mass of glass fiber, 2-15 parts by mass of carbon nano tube, 0.5-4 parts by mass of 1, 3-butanediol, 5-30 parts by mass of heat-resistant modifier, 5-10 parts by mass of low shrinkage agent, 1-5 parts by mass of release agent, 5-15 parts by mass of coupling agent, 1-5 parts by mass of fluorinated graphene, 1-5 parts by mass of initiator and 1-5 parts by mass of thickener; the high-wave-transmission fiber cloth layer comprises composite core-spun gauze formed by weaving carbon fiber core yarns and glass fiber woven yarns and curing resin cured outside the composite core-spun gauze. The glass fiber reinforced plastic has the advantages of small dielectric constant, good wave permeability, high mechanical strength and long service life.
Description
Technical Field
The invention relates to the field of antenna covers, in particular to a high-wave-transmission high-strength carbon fiber glass fiber composite glass fiber reinforced plastic antenna cover and a production process thereof.
Background
With the development of modern mobile communication technology, the current mobile communication technology is stepping into the 5G era. The 5G is not a single radio access technology, nor several new radio access technologies, but a solution obtained by integrating a plurality of new radio access technologies with the existing radio access technology is called as a convergence network in the true sense.
The 5G network, as a next generation mobile communication network, is also an extension behind 4G, which is faster than the transmission speed of the existing 4G network, at least reaching more than ten times or even hundreds times of the existing 4G transmission speed, and the maximum theoretical transmission speed can reach tens of Gb per second. The research and development of 5G technology is also being carried out by the department of industry and informatization in China, and 5G commercial implementation is planned in 2020.
In the large-scale application of the 5G network, a large number of antennas need to be built, and outdoor antennas are usually placed in the open air to work and are directly attacked by storm, ice, snow, sand, solar radiation and the like in nature, so that the accuracy of the antennas is reduced, the service life is shortened, and the working reliability is poor. The purpose of using the antenna cover is as follows: the antenna system is protected from being influenced by wind, rain, ice, snow, sand, dust, solar radiation and the like, so that the working performance of the antenna system is stable and reliable, meanwhile, the abrasion, corrosion and aging of the antenna system are reduced, and the service life is prolonged. Secondly, the wind load and the wind moment are eliminated, the driving power of the rotating antenna is reduced, the mass of a mechanical structure is reduced, the inertia is reduced, and the natural frequency is improved. The related equipment and personnel can work in the cover without being influenced by the external environment, thereby improving the use efficiency of the equipment and improving the working conditions of the operators. And fourthly, for the aircraft flying at high speed, the antenna housing can solve the problems caused by high temperature, aerodynamic load and other loads.
The parameters influencing the performance of the glass fiber reinforced plastic radome are mainly 2, namely mechanical strength and dielectric constant. The higher the mechanical strength of the radome is, the stronger the radome has the capability of resisting external impact; the lower the dielectric constant of the radome, the higher its wave transmittance. Therefore, the high-strength and low-dielectric constant radome becomes a standard for measuring the high-performance radome. However, the existing antenna housing does not have the requirements of stable physical, mechanical, electrical and chemical properties in the aspect of mechanical properties, the glass-transparent effect cannot achieve the ideal effect, and the dielectric constant cannot be reduced while the strength is achieved.
Disclosure of Invention
In order to solve the technical problems, the invention provides the high-wave-permeability and high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome which has the advantages of small dielectric constant, good wave-permeability, high mechanical strength and long service life and the production process thereof.
The invention adopts the following technical scheme: the antenna pole comprises a mounting seat for mounting on a wall, a protective cover which can be opened and closed and is covered outside the mounting seat, and an antenna pole which is positioned in a cavity formed by the surrounding of the mounting seat and the protective cover; the mounting base comprises a mounting bottom frame, a plurality of hooks which are arranged on one side of the mounting bottom frame, close to the protective cover, and used for connecting the protective cover, and a support bar which is vertically arranged at the top of the mounting bottom frame and used for fixing the antenna holding pole, the protective cover is provided with an opening for accommodating the hooks corresponding to the hooks on the mounting base, the antenna holding pole is provided with a T-shaped boss corresponding to the support bar, and the T-shaped boss is clamped on the support bar so that the antenna holding pole is stably connected to the mounting base; the bottom of the protective cover is provided with a U-shaped hole for maintenance; the protective cover sequentially comprises a heat conduction layer, a high-wave-transmission fiber cloth layer, a glass fiber reinforced plastic base layer and an infrared conversion layer from inside to outside, the high-wave-transmission fiber cloth layer is bonded on one side surface of the glass fiber reinforced plastic base layer, the infrared conversion layer is coated on the surface of the glass fiber reinforced plastic base layer, which is far away from one side of the high-wave-transmission fiber cloth layer, and the heat conduction layer is coated on the surface of one side of the high-wave-transmission fiber cloth layer; the glass fiber reinforced plastic base layer comprises the following raw materials, by mass, 50-80 parts of unsaturated polyester resin, 5-20 parts of glass fiber, 2-15 parts of carbon nano tube, 0.5-4 parts of 1, 3-butanediol, 5-30 parts of heat-resistant modifier, 5-10 parts of low shrinkage agent, 1-5 parts of mold release agent, 5-15 parts of coupling agent, 1-5 parts of fluorinated graphene, 1-5 parts of initiator and 1-5 parts of thickening agent; the high-wave-transmission fiber cloth layer comprises composite core-spun gauze formed by weaving carbon fiber core yarns and glass fiber woven yarns and solidified resin solidified outside the composite core-spun gauze.
The technical proposal is further improved in that the mass ratio of the glass fiber, the carbon nano tube, the 1, 3-butanediol and the heat-resistant modifier is 10: 5: 1.5: 20.
the technical proposal is further improved in that the heat-resistant modifier comprises the following raw materials in parts by mass: 5-15 parts of organic montmorillonite, 4-8 parts of tetrabutylammonium iodide, 3-9 parts of dichloroethane, 4-9 parts of silane coupling agent KH-5602-6 parts and 4-9 parts of glass fiber reinforced plastic powder.
The technical scheme is further improved in that the low shrinkage agent comprises polystyrene and styrene, the mixing mass ratio of the polystyrene to the styrene is 1:1-2, the initiator is tert-butyl peroxybenzoate, the thickener is calcium hydroxide, and the release agent is zinc stearate.
The technical proposal is further improved in that the glass fiber is a mixture of alkali-free continuous glass fiber and short fiber with the short length of 25.4mm, and the mixing ratio is 1:5-5: 1. .
The manufacturing process of the high-wave-permeability high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome of any one of claims 1 to 5, wherein the manufacturing process of the glass fiber reinforced plastic base layer comprises the following steps of a, preparing the heat-resistant modifier, uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to be heated for 25-35min, then adding glass fiber reinforced plastic powder to be uniformly mixed, ultrasonically dispersing for 10-20min, adjusting the pH to 2.5-3.5, then putting the mixture into the water bath to be heated for 25-35min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a 100-DEG C120-oven to be dried for 1-3h, cooling to the room temperature to obtain the heat-resistant modifier, b, weighing the unsaturated polyester resin, the glass fiber, the carbon nanotube, the 1, 3-butanediol, the glass fiber, the carbon nanotube and the silane coupling agent, Adding a heat-resistant modifier, a coupling agent, fluorinated graphene, a curing agent and a processing aid into a pulping machine, quickly stirring for 10-15 minutes, then transferring the uniformly stirred slurry into a kneading machine to knead for 3-5 minutes, then adding a low shrinkage agent and a release agent in parts by mass in sequence, and kneading for 15-20 minutes to obtain the high-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
The invention has the beneficial effects that:
1. on the one hand, pass through the fix with screw on the wall with the mount pad, install the antenna on the antenna pole, place the antenna pole on the support bar of mount pad, guarantee that T shape boss card locates on the support bar, locate the mount pad outside with the safety cover again, make the couple of mount pad hold in the trompil of safety cover, thereby guarantee that the safety cover is stable to be connected with the mount pad, when needs are maintained, can directly maintain through the U type hole of safety cover bottom, guarantee the reliable operation of antenna, moreover, the steam generator is simple in structure, the installation is maintained conveniently. The second aspect, the safety cover includes heat-conducting layer, high wave-transparent fibre cloth layer, glass steel base layer and infrared conversion layer from inside to outside in proper order, high wave-transparent fibre cloth layer bonds in a glass steel base layer side surface, infrared conversion layer coats in the surface that glass steel base layer deviates from high wave-transparent fibre cloth layer one side, heat-conducting layer coats in high wave-transparent fibre cloth layer side surface, the inside heat of antenna house, transmit in proper order to high wave-transparent fibre cloth layer through the heat-conducting layer, metal base layer, the micro arc oxide layer, infrared conversion layer through the surface turns into the heat during infrared ray and radiates to external environment at last, thereby reduce the inside temperature of antenna house, prevent the too high electric property that influences the antenna house of temperature and the reliability of antenna, guarantee that the antenna house has better wave-transparent rate and lower dielectric constant. Meanwhile, the arrangement of the high-wave-transmission fiber cloth layer increases the overall mechanical strength of the antenna housing, and has the advantages of low dielectric constant, good wave-transmission performance and better guarantee of the reliable operation of the antenna. In the third aspect, the heat-resistant modifier is added in the glass fiber reinforced plastic substrate forming system, and the glass fiber, the carbon nanotube, the 1, 3-butanediol and the heat-resistant modification auxiliary agent are simultaneously added, so that a synergistic effect is achieved, the high temperature resistance and the mechanical strength of the glass fiber reinforced plastic are obviously improved, and the possibility is that: the preparation method comprises the steps of applying glass fiber, carbon nano tubes, 1, 3-butanediol and a heat-resistant modifier as a modification system to the preparation of unsaturated polyester resin, utilizing the grafting modification effect of the 1, 3-butanediol to graft hydroxyl groups on the surfaces of the glass fiber, the carbon nano tubes and the heat-resistant modifier with a base material of the unsaturated polyester resin, endowing the unsaturated polyester resin with excellent strength, and utilizing the heat-resistant enhancement effect of the heat-resistant modifier, wherein the heat-resistant modifier is prepared by uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then placing the mixture into a water bath for heating, then adding glass fiber reinforced plastic powder for uniformly mixing, performing ultrasonic dispersion, adjusting pH, then placing the mixture into the water bath for heating, then performing solid-liquid separation, washing and dehydration, then placing the dehydrated powder into an oven for drying, the heat-resistant modified auxiliary agent is obtained by cooling to room temperature, and when the heat-resistant modified auxiliary agent is applied to the preparation of the unsaturated polyester resin, the heat-resistant modified auxiliary agent is grafted and combined with the main material of the unsaturated polyester resin under the action of 1, 3-butanediol, so that the strength of the unsaturated polyester resin is effectively improved. The fluorinated graphene is added in the system, and the highly fluorinated graphene is filled in the unsaturated polyester resin, so that the dielectric constant and the dielectric loss can be effectively reduced, and the mechanical property and the chemical/thermodynamic resistance of the composite material are improved. In a fourth aspect, the high wave-transparent fiber cloth layer comprises a composite core-spun gauze formed by weaving carbon fiber core yarns and glass fiber woven yarns and a curing resin cured outside the composite core-spun gauze, wherein the carbon fiber is made of carbon fibers processed by an epoxy coating and pressed and woven by graphite, and has the advantages of light weight, high tensile strength and high processing degree, so that the mechanical property can be improved, the strength and toughness can be increased, the cost can be reduced, and the dielectric loss can be reduced. The carbon fiber is used as the core yarn and basically in a straightening state, so that the mechanical property of the carbon fiber can be effectively exerted, and the manufactured stealth composite material has good mechanical property. The composite core-spun gauze structure of the high-wave-transmission fiber cloth layer improves the wave-transmission performance and the mechanical strength of the antenna housing.
2. The free end of support bar stretches into the safety cover inside and with safety cover top inner wall butt, the support bar also plays the supporting role to the safety cover simultaneously, guarantees the mount pad and is connected with the stability of safety cover to improve the holistic connection stability of antenna house, whole mechanical strength is high, the reliable operation of better assurance antenna.
3. The glass steel substrate layer is close to one side on high wave-transparent fiber cloth layer and has been seted up the first recess of a plurality of, the one side that deviates from high wave-transparent fiber cloth layer has seted up a plurality of second recess, all pack in first recess and the second recess has the heat conduction granule, the setting of first recess and second recess, one has increased glass steel substrate's heat transfer efficiency, improve the radiating effect, thereby reduce the inside temperature of antenna house, prevent that the high temperature from influencing the electrical property of antenna house and the reliability of antenna, guarantee that the antenna house has better wave-transparent rate and lower dielectric constant, the deformation space of glass steel substrate has been increased for two, the holistic elasticity of antenna house has been increased, play cushioning effect and come to offset the external stress to the antenna house, prevent that external force from causing the antenna house to take place deformation, anti deformation ability is strong, better assurance antenna's reliable operation.
4. First recess and second recess intermittent type are arranged, prevent that the two from corresponding the groove mechanical strength that sets up the cause and reducing, be equipped with heat dissipation channel between first recess and the second recess, heat dissipation channel's setting, one has increased glass steel base layer's heat transfer efficiency, improve the radiating effect, thereby reduce the inside temperature of antenna house, prevent that the high temperature from influencing the electrical property of antenna house and the reliability of antenna, guarantee that the antenna house has better wave-transparent rate and lower dielectric constant, the deformation space of glass steel base layer has been increased for two times, the holistic elasticity of antenna house has been increased, play the cushioning effect and offset the external stress to the antenna house, prevent that external force from causing the antenna house to take place deformation, anti deformability is strong, the reliable operation of better assurance antenna.
5. For the glass fiber reinforced plastic substrate, the unsaturated polyester resin is the most commonly used one of thermosetting resins, and is a linear high molecular compound having an ester bond and an unsaturated double bond, which is obtained by condensation polymerization of a saturated dibasic acid, an unsaturated dibasic acid and a dihydric alcohol. The unsaturated polyester resin has carboxyl and hydroxyl groups at both ends. The unsaturated polyester resin has higher tensile, bending and compression strength, better water, dilute acid and dilute alkali resistance, poor organic solvent resistance and good dielectric property. The low shrinkage agent compensates polymerization shrinkage through local relaxation of tetragonal internal stress, so that the effect of reducing the shrinkage rate of the molding compound is achieved. Polystyrene and styrene are in a two-phase system in unsaturated polyester resin, and the curing shrinkage of the resin is inhibited by utilizing the thermal expansion property of the resin. The glass fiber is an inorganic non-metallic material with excellent performance, good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, but has the defects of brittle performance and poor wear resistance, and can improve the tensile strength of the molding compound. The zinc stearate has good compatibility and can be used as a release agent. The calcium hydroxide is used as a thickening agent and is cheap and easy to obtain. The calcium hydroxide can react with carboxyl of unsaturated polyester resin to generate basic salt. The tert-butyl peroxybenzoate is colorless to yellowish liquid, is insoluble in water, can be dissolved in an organic solvent, and plays a role of an initiator in the curing process of the unsaturated polyester resin. Meanwhile, after the unsaturated polyester resin is cured, a filler system and the unsaturated polyester resin system form a gap, the volume of the gap is increased, and the volume shrinkage rate is relatively reduced.
6. The glass fiber is a mixture of alkali-free continuous glass fiber and short fiber with the short length of 25.4mm, and the mixing proportion is as follows: 1:5-5:1, and the obtained glass fiber reinforced plastic is obviously improved in mechanical property compared with the conventional glass fiber reinforced plastic which is completely reinforced by chopped glass fibers because the continuous oriented glass fibers are matched with part of chopped glass fibers for reinforcement.
7. A, preparing a heat-resistant modifier, namely uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to heat for 25-35min, then adding glass fiber reinforced plastic powder to mix uniformly, ultrasonically dispersing for 10-20min, adjusting the pH to 2.5-3.5, then putting the mixture into the water bath to heat for 25-35min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a 100-DEG C oven to dry for 1-3h, and cooling to room temperature to obtain the heat-resistant modifier, b, weighing unsaturated polyester resin, glass fiber, carbon nano tube, 1, 3-butanediol, the heat-resistant modifier, the coupling agent, graphene fluoride, a curing agent in parts by mass, and mixing uniformly, And adding the processing aid into a beater, quickly stirring for 10-15 minutes, then transferring the uniformly stirred slurry into a kneader to knead for 3-5 minutes, then adding the low shrinkage agent and the release agent in parts by mass in sequence, and kneading for 15-20 minutes to obtain the high-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome. The process flow is simple, the conditions are easy to control, and the prepared glass fiber reinforced plastic has the advantages of small dielectric constant, good wave permeability, high mechanical strength and long service life.
Drawings
Fig. 1 is a schematic structural view of a radome of the present invention;
fig. 2 is a schematic cross-sectional view of a protective cover of the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples.
Example (b):
fig. 1 is a schematic structural diagram of the present invention.
The low-dielectric-constant high-wave-permeability radome 100 comprises a mounting base 110 for mounting on a wall, a protective cover 120 capable of being opened and closed and arranged outside the mounting base 110, and an antenna holding pole 130 positioned in a cavity formed by the surrounding of the mounting base 110 and the protective cover 120; the mounting base 110 comprises a mounting bottom frame 111, a plurality of hooks 112 arranged on one side of the mounting bottom frame 111 close to the protective cover 120 and used for connecting the protective cover 120, and a support bar 113 perpendicular to the top of the mounting bottom frame 111 and used for fixing the antenna pole 130, the hooks 112 on the mounting base 110 corresponding to the protective cover 120 are provided with openings 121 used for accommodating the hooks 112, the antenna pole 130 is provided with a T-shaped boss 131 corresponding to the support bar 113, and the T-shaped boss 131 is clamped on the support bar 113 so that the antenna pole 130 is stably connected to the mounting base 110; the bottom of the protective cover 120 is provided with a U-shaped hole for maintenance.
Fig. 2 is a schematic cross-sectional view of the boot of the present invention.
The protective cover 120 includes heat-conducting layer 120a, high wave-transparent fiber cloth layer 120b, glass fiber reinforced plastic basic unit 120c and infrared conversion layer 120d from inside to outside in proper order, high wave-transparent fiber cloth layer 120b bonds in glass fiber reinforced plastic basic unit 120c side surface, and infrared conversion layer 120d coats in glass fiber reinforced plastic basic unit 120c and deviates from the surface of high wave-transparent fiber cloth layer 120b one side, and heat-conducting layer 120a coats in high wave-transparent fiber cloth layer 120b side surface.
The free end of the support bar 113 extends into the inside of the protective cover 120 and abuts against the inner wall of the top of the protective cover 120, the support bar 113 also supports the protective cover 120, and the stable connection between the mounting seat 110 and the protective cover 120 is ensured, so that the overall connection stability of the antenna housing 100 is improved, the overall mechanical strength is high, and the reliable operation of the antenna is better ensured.
One side of the glass fiber reinforced plastic base layer 120c close to the high wave-transmitting fiber cloth layer 120b is provided with a plurality of first grooves 120c1, one side of the glass fiber reinforced plastic base layer 120c far away from the high wave-transmitting fiber cloth layer 120b is provided with a plurality of second grooves 120c2, heat-conducting particles are filled in the first grooves 120c1 and the second grooves 120c2, the first grooves 120c1 and the second grooves 120c2 are arranged, so that the heat transfer efficiency of the glass fiber reinforced plastic base layer 120c is increased, the heat dissipation effect is improved, the temperature inside the radome 100 is reduced, the electrical performance of the radome 100 and the reliability of an antenna are prevented from being affected by overhigh temperature, the radome 100 is ensured to have better wave-transmitting rate and lower dielectric constant, the deformation space of the glass fiber reinforced plastic base layer 120c is increased, the overall elasticity of the radome 100 is increased, a buffering effect is achieved to offset the external stress on the radome 100, and the deformation caused by an external force is prevented, the anti-deformation capability is strong, and the reliable operation of the antenna is better ensured.
First recess 120c1 and second recess 120c2 intermittent type are arranged, prevent that the two from corresponding the recess department mechanical strength who sets up and cause and reducing, be equipped with heat dissipation channel 120c3 between first recess 120c1 and the second recess 120c2, heat dissipation channel 120c 3's setting, one has increased glass steel base 120 c's heat transfer efficiency, improve the radiating effect, thereby reduce the inside temperature of antenna house 100, prevent that the high temperature from influencing the electrical property of antenna house 100 and the reliability of antenna, guarantee that antenna house 100 has better wave transmissivity and lower dielectric constant, two increase glass steel base 120 c's deformation space, the holistic elasticity of antenna house 100 has been increased, play the cushioning effect and offset external stress to antenna house 100, prevent that external force from causing antenna house 100 to take place deformation, anti deformability is strong, better assurance antenna's reliable operation.
The high wave-transparent fiber cloth layer 120b comprises composite core-spun gauze formed by weaving carbon fiber core yarns and glass fiber woven yarns and cured resin cured outside the composite core-spun gauze, the carbon fibers are made of carbon fibers processed by epoxy coating and pressed and woven by graphite, the high wave-transparent fiber cloth layer has the advantages of light weight and high tensile strength, the carbon fibers are also highly processed materials, the mechanical property can be improved, the strength and toughness are increased, the cost is reduced, and the dielectric loss can be reduced. The carbon fiber is used as the core yarn and basically in a straightening state, so that the mechanical property of the carbon fiber can be effectively exerted, and the manufactured stealth composite material has good mechanical property. The composite core-spun gauze structure of the high-wave-transmission fiber cloth layer improves the wave-transmission performance and the mechanical strength of the antenna housing.
On the one hand, with mount pad 110 through the fix with screw on the wall, install the antenna on antenna pole 130, place antenna pole 130 on mount pad 110's support bar 113, guarantee that T shape boss 131 card locates on support bar 113, locate the mount pad 110 outside with the safety cover 120 cover again, make the couple 112 of mount pad 110 hold in safety cover 120's trompil 121, thereby guarantee that safety cover 120 is stable to be connected with mount pad 110, when needs are maintained, can directly maintain through the U type hole of safety cover 120 bottom, guarantee the reliable operation of antenna, moreover, the steam generator is simple in structure, the installation is maintained conveniently. In the second aspect, the protective cover 120 comprises, from inside to outside, a heat conductive layer 120a, a high wave-transparent fiber cloth layer 120b, a glass fiber reinforced plastic base layer 120c and an infrared conversion layer 120d, the high wave-transmitting fiber cloth layer 120b is adhered to one side surface of the glass fiber reinforced plastic base layer 120c, the infrared conversion layer 120d is coated on the surface of the glass fiber reinforced plastic base layer 120c facing away from the high wave-transmitting fiber cloth layer 120b, the heat conducting layer 120a is coated on one side surface of the high wave-transmitting fiber cloth layer 120b, the heat inside the antenna cover 100, the heat is transmitted to the high-wave-transparent fiber cloth layer 120b, the glass fiber reinforced plastic base layer 120c and the infrared conversion layer 120d in sequence through the heat conduction layer 120a, finally the heat is converted into infrared rays through the infrared conversion layer 120d on the outer surface and radiated to the external environment, thereby reduce the inside temperature of antenna house 100, prevent that the high temperature from influencing the electricity performance of antenna house 100 and the reliability of antenna, guarantee that antenna house 100 has better wave transmissivity and lower dielectric constant. Meanwhile, the arrangement of the high-wave-transmitting fiber cloth layer 120b increases the overall mechanical strength of the antenna housing 100, and has low dielectric constant and good wave-transmitting property, thereby better ensuring the reliable operation of the antenna.
The glass fiber reinforced plastic base layer of the antenna housing 100 comprises, by mass, 63 parts of unsaturated polyester resin, 5 parts of glass fiber, 2.5 parts of carbon nanotubes, 0.75 part of 1, 3-butanediol, 10 parts of a heat-resistant modifier, 6 parts of a low shrinkage agent, 2.5 parts of a release agent, 6 parts of a coupling agent, 1.25 parts of fluorinated graphene, 1.5 parts of an initiator and 1.5 parts of a thickening agent.
Wherein the heat-resistant modifier comprises the following raw materials in parts by mass: 10 parts of organic montmorillonite, 6 parts of tetrabutylammonium iodide, 6 parts of dichloroethane, KH-5604 parts of silane coupling agent and 7 parts of glass fiber reinforced plastic powder.
The low shrinkage agent comprises polystyrene and styrene, wherein the mixing mass ratio of the polystyrene to the styrene is 1.5: 2, the initiator is tert-butyl peroxybenzoate, the thickening agent is calcium hydroxide, and the release agent is zinc stearate.
The glass fiber is a mixture of alkali-free continuous glass fiber and short fiber with the short length of 25.4mm, and the mixing ratio is 1: 3.
a, preparing a heat-resistant modifier, uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to heat for 30min, then adding glass fiber reinforced plastic powder to mix uniformly, ultrasonically dispersing for 15min, adjusting the pH value to 3, then putting the mixture into the water bath to heat for 30min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a drying oven at 110 ℃ to dry for 2h, cooling to room temperature to obtain the heat-resistant modifier, b, weighing unsaturated polyester resin, glass fiber, carbon nano tube, 1, 3-butanediol, the heat-resistant modifier, the coupling agent, graphene fluoride, a curing agent and a processing aid in parts by mass, adding the mixture into a beating machine, and rapidly stirring for 13 min, and then, transferring the uniformly stirred slurry into a kneading machine to be kneaded for 4 minutes, and then adding a low shrinkage agent and a release agent in parts by mass in sequence to be kneaded for 18 minutes to obtain the high-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
Control group one:
the specific structure of the radome 100 is the same as that of the embodiment, and the glass fiber reinforced plastic base layer of the radome comprises, by mass, 63 parts of unsaturated polyester resin, 5 parts of glass fiber, 2.5 parts of carbon nanotubes, 0.75 part of 1, 3-butanediol, 10 parts of a heat-resistant modifier, 6 parts of a low shrinkage agent, 2.5 parts of a release agent, 6 parts of a coupling agent, 1.25 parts of fluorinated graphene, 1.5 parts of an initiator, and 1.5 parts of a thickener.
Wherein the heat-resistant modifier comprises the following raw materials in parts by mass: 10 parts of organic montmorillonite, 6 parts of tetrabutylammonium iodide, 6 parts of dichloroethane, KH-5604 parts of silane coupling agent and 7 parts of glass fiber reinforced plastic powder.
The low shrinkage agent comprises polystyrene and styrene, wherein the mixing mass ratio of the polystyrene to the styrene is 1.5: 2, the initiator is tert-butyl peroxybenzoate, the thickening agent is calcium hydroxide, and the release agent is zinc stearate.
The glass fiber is alkali-free continuous glass fiber.
A, preparing a heat-resistant modifier, uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to heat for 30min, then adding glass fiber reinforced plastic powder to mix uniformly, ultrasonically dispersing for 15min, adjusting the pH value to 3, then putting the mixture into the water bath to heat for 30min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a drying oven at 110 ℃ to dry for 2h, cooling to room temperature to obtain the heat-resistant modifier, b, weighing unsaturated polyester resin, glass fiber, carbon nano tube, 1, 3-butanediol, the heat-resistant modifier, the coupling agent, graphene fluoride, a curing agent and a processing aid in parts by mass, adding the mixture into a beating machine, and rapidly stirring for 13 min, and then, transferring the uniformly stirred slurry into a kneading machine to be kneaded for 4 minutes, and then adding a low shrinkage agent and a release agent in parts by mass in sequence to be kneaded for 18 minutes to obtain the high-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
Control group two:
the specific structure of the radome 100 is the same as that of the embodiment, and the glass fiber reinforced plastic base layer of the radome comprises, by mass, 63 parts of unsaturated polyester resin, 5 parts of glass fiber, 2.5 parts of carbon nanotubes, 0.75 part of 1, 3-butanediol, 10 parts of a heat-resistant modifier, 6 parts of a low shrinkage agent, 2.5 parts of a release agent, 6 parts of a coupling agent, 1.25 parts of fluorinated graphene, 1.5 parts of an initiator, and 1.5 parts of a thickener.
Wherein the heat-resistant modifier comprises the following raw materials in parts by mass: 10 parts of organic montmorillonite, 6 parts of tetrabutylammonium iodide, 6 parts of dichloroethane, KH-5604 parts of silane coupling agent and 7 parts of glass fiber reinforced plastic powder.
The low shrinkage agent comprises polystyrene and styrene, wherein the mixing mass ratio of the polystyrene to the styrene is 1.5: 2, the initiator is tert-butyl peroxybenzoate, the thickening agent is calcium hydroxide, and the release agent is zinc stearate.
The glass fiber is short fiber with the short length of 25.4 mm.
A, preparing a heat-resistant modifier, uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to heat for 30min, then adding glass fiber reinforced plastic powder to mix uniformly, ultrasonically dispersing for 15min, adjusting the pH value to 3, then putting the mixture into the water bath to heat for 30min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a drying oven at 110 ℃ to dry for 2h, cooling to room temperature to obtain the heat-resistant modifier, b, weighing unsaturated polyester resin, glass fiber, carbon nano tube, 1, 3-butanediol, the heat-resistant modifier, the coupling agent, graphene fluoride, a curing agent and a processing aid in parts by mass, adding the mixture into a beating machine, and rapidly stirring for 13 min, and then, transferring the uniformly stirred slurry into a kneading machine to be kneaded for 4 minutes, and then adding a low shrinkage agent and a release agent in parts by mass in sequence to be kneaded for 18 minutes to obtain the high-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
Control group three:
the specific structure of the radome 100 is the same as that of the embodiment, and the glass fiber reinforced plastic substrate of the radome comprises, by mass, 64.25 parts of unsaturated polyester resin, 5 parts of glass fiber, 2.5 parts of carbon nanotubes, 0.75 part of 1, 3-butanediol, 10 parts of a heat-resistant modifier, 6 parts of a low shrinkage agent, 2.5 parts of a release agent, 6 parts of a coupling agent, 1.5 parts of an initiator, and 1.5 parts of a thickener.
Wherein the heat-resistant modifier comprises the following raw materials in parts by mass: 10 parts of organic montmorillonite, 6 parts of tetrabutylammonium iodide, 6 parts of dichloroethane, KH-5604 parts of silane coupling agent and 7 parts of glass fiber reinforced plastic powder.
The low shrinkage agent comprises polystyrene and styrene, wherein the mixing mass ratio of the polystyrene to the styrene is 1.5: 2, the initiator is tert-butyl peroxybenzoate, the thickening agent is calcium hydroxide, and the release agent is zinc stearate.
The glass fiber is a mixture of alkali-free continuous glass fiber and short fiber with the short length of 25.4mm, and the mixing ratio is 1: 3.
a, preparing a heat-resistant modifier, uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to heat for 30min, then adding glass fiber reinforced plastic powder to mix uniformly, ultrasonically dispersing for 15min, adjusting the pH value to 3, then putting the mixture into the water bath to heat for 30min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a drying oven at 110 ℃ to dry for 2h, cooling to room temperature to obtain the heat-resistant modifier, b, weighing unsaturated polyester resin, glass fiber, carbon nano tube, 1, 3-butanediol, the heat-resistant modifier, the coupling agent, a curing agent and a processing aid in parts by mass, adding the mixture into a beater, quickly stirring for 13 min, and then, and transferring the uniformly stirred slurry into a kneading machine to be kneaded for 4 minutes, then adding a low shrinkage agent and a release agent in parts by mass in sequence, and kneading for 18 minutes to obtain the high-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
Control group four:
the specific structure of the radome 100 is the same as that of the embodiment, and the glass fiber reinforced plastic base layer of the high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome comprises, by mass, 75.75 parts of unsaturated polyester resin, 5 parts of glass fiber, 6 parts of low shrinkage agent, 2.5 parts of release agent, 6 parts of coupling agent, 1.25 parts of fluorinated graphene, 1.5 parts of initiator and 1.5 parts of thickener.
The low shrinkage agent comprises polystyrene and styrene, wherein the mixing mass ratio of the polystyrene to the styrene is 1.5: 2, the initiator is tert-butyl peroxybenzoate, the thickening agent is calcium hydroxide, and the release agent is zinc stearate.
The glass fiber is a mixture of alkali-free continuous glass fiber and short fiber with the short length of 25.4mm, and the mixing ratio is 1: 3.
a production process of a high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome comprises the following steps of weighing unsaturated polyester resin, glass fiber, a coupling agent, fluorinated graphene, a curing agent and a processing aid in parts by mass, adding the weighed unsaturated polyester resin, the glass fiber, the coupling agent, the fluorinated graphene, the curing agent and the processing aid into a beater, quickly stirring the mixture for 13 minutes, transferring the uniformly stirred slurry into a kneader to knead the mixture for 4 minutes, adding a low-shrinkage agent and a release agent in parts by mass in sequence, and kneading the mixture for 18 minutes to obtain the high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
Compared with the embodiment, the glass fiber of the first control group is alkali-free continuous glass fiber; compared with the embodiment, the glass fiber of the second control group is short fiber with the short cutting length of 25.4 mm; the third control group is not added with fluorinated graphene, and the fourth control group is not added with carbon nano tubes, 1, 3-butanediol and heat-resistant modifier.
The glass fiber reinforced plastics in the embodiment and the comparison group I, the comparison group II, the comparison group III and the comparison group IV are subjected to physical and chemical property tests, and through the tests, the embodiment has better mechanical property compared with the comparison group I and the comparison group II, and has lower dielectric constant and better wave permeability compared with the comparison group III; compared with the fourth control group, the embodiment has higher mechanical strength and better high temperature resistance. Description 1, the glass fiber formed by the mixture of the alkali-free continuous glass fiber and the short fiber with the short length of 25.4mm can obviously improve the mechanical strength of the glass fiber reinforced plastic; 2. according to the invention, the fluorinated graphene is added, so that the dielectric constant of the glass fiber reinforced plastic can be reduced, and the wave permeability of the glass fiber reinforced plastic can be improved; 3. the carbon nano tube, the 1, 3-butanediol and the heat-resistant modifier are added into the glass fiber reinforced plastic base layer, so that the mechanical property and the high temperature resistance of the glass fiber reinforced plastic base layer can be improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. High fine compound glass fiber reinforced plastic antenna house of fine carbon of wave transmission height, its characterized in that: the antenna pole comprises a mounting seat for mounting on a wall, a protective cover which can be opened and closed and is covered outside the mounting seat, and an antenna pole which is positioned in a cavity formed by the surrounding of the mounting seat and the protective cover; the mounting base comprises a mounting bottom frame, a plurality of hooks which are arranged on one side of the mounting bottom frame, close to the protective cover, and used for connecting the protective cover, and a support bar which is vertically arranged at the top of the mounting bottom frame and used for fixing the antenna holding pole, the protective cover is provided with an opening for accommodating the hooks corresponding to the hooks on the mounting base, the antenna holding pole is provided with a T-shaped boss corresponding to the support bar, and the T-shaped boss is clamped on the support bar so that the antenna holding pole is stably connected to the mounting base; the bottom of the protective cover is provided with a U-shaped hole for maintenance; the protective cover sequentially comprises a heat conduction layer, a high-wave-transmission fiber cloth layer, a glass fiber reinforced plastic base layer and an infrared conversion layer from inside to outside, the high-wave-transmission fiber cloth layer is bonded on one side surface of the glass fiber reinforced plastic base layer, the infrared conversion layer is coated on the surface of the glass fiber reinforced plastic base layer, which is far away from one side of the high-wave-transmission fiber cloth layer, and the heat conduction layer is coated on the surface of one side of the high-wave-transmission fiber cloth layer; the glass fiber reinforced plastic base layer comprises the following raw materials, by mass, 50-80 parts of unsaturated polyester resin, 5-20 parts of glass fiber, 2-15 parts of carbon nano tube, 0.5-4 parts of 1, 3-butanediol, 5-30 parts of heat-resistant modifier, 5-10 parts of low shrinkage agent, 1-5 parts of mold release agent, 5-15 parts of coupling agent, 1-5 parts of fluorinated graphene, 1-5 parts of initiator and 1-5 parts of thickening agent; the high-wave-transmission fiber cloth layer comprises composite core-spun gauze formed by weaving carbon fiber core yarns and glass fiber woven yarns and solidified resin solidified outside the composite core-spun gauze; a plurality of first grooves are formed in one side, close to the high-wave-transmission fiber cloth layer, of the glass fiber reinforced plastic base layer, a plurality of second grooves are formed in one side, away from the high-wave-transmission fiber cloth layer, of the glass fiber reinforced plastic base layer, and heat conducting particles are filled in the first grooves and the second grooves; the first grooves and the second grooves are arranged intermittently, and heat dissipation channels are arranged between the first grooves and the second grooves.
2. The high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome of claim 1, wherein: the mass ratio of the glass fiber to the carbon nano tube to the 1, 3-butanediol to the heat-resistant modifier is 10: 5: 1.5: 20.
3. the high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome of claim 2, wherein: the heat-resistant modifier comprises the following raw materials in parts by mass: 5-15 parts of organic montmorillonite, 4-8 parts of tetrabutylammonium iodide, 3-9 parts of dichloroethane, 4-9 parts of silane coupling agent KH-5602-6 parts and 4-9 parts of glass fiber reinforced plastic powder.
4. The high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome of claim 3, wherein: the low shrinkage agent comprises polystyrene and styrene, the mixing mass ratio of the polystyrene to the styrene is 1:1-2, the initiator is tert-butyl peroxybenzoate, the thickening agent is calcium hydroxide, and the release agent is zinc stearate.
5. The high-wave-transmission high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome of claim 4, wherein: the glass fiber is a mixture of alkali-free continuous glass fiber and short fiber with the short length of 25.4mm, and the mixing ratio is 1:5-5: 1.
6. The production process of the high-wave-permeability high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome of any one of claims 1 to 5, wherein the preparation process of the glass fiber reinforced plastic base layer comprises the following steps of a, preparing a heat-resistant modifier, uniformly mixing organic montmorillonite, tetrabutylammonium iodide, dichloroethane and a silane coupling agent KH-560, then putting the mixture into a water bath to be heated for 25-35min, then adding glass fiber reinforced plastic powder to be uniformly mixed, ultrasonically dispersing for 10-20min, adjusting the pH value to 2.5-3.5, then putting the mixture into the water bath to be heated for 25-35min, then carrying out solid-liquid separation, washing and dehydration, then putting the dehydrated powder into a 100-120 ℃ oven to be dried for 1-3h, cooling to room temperature to obtain the heat-resistant modifier, b, weighing the unsaturated polyester resin, the glass fiber, the carbon nanotube, Adding 1, 3-butanediol, a heat-resistant modifier, a coupling agent, fluorinated graphene, a curing agent and a processing aid into a pulping machine, quickly stirring for 10-15 minutes, then transferring the uniformly stirred slurry into a kneading machine to knead for 3-5 minutes, then adding a low shrinkage agent and a release agent in parts by mass in sequence, and kneading for 15-20 minutes to obtain the high-wave-transmittance high-strength carbon fiber and glass fiber composite glass fiber reinforced plastic radome.
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| CN111293406A (en) * | 2020-04-10 | 2020-06-16 | 吉铁磊 | Signal antenna protection mechanism based on 5G basic station |
| CN111690265A (en) * | 2020-07-28 | 2020-09-22 | 山东辰元新材料科技有限公司 | Composite material for glass fiber reinforced plastic U-shaped water tank |
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