CN110760146A - High strength CPVC high voltage electricity protecting pipe - Google Patents
High strength CPVC high voltage electricity protecting pipe Download PDFInfo
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- CN110760146A CN110760146A CN201911076808.7A CN201911076808A CN110760146A CN 110760146 A CN110760146 A CN 110760146A CN 201911076808 A CN201911076808 A CN 201911076808A CN 110760146 A CN110760146 A CN 110760146A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/22—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L27/24—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers modified by chemical after-treatment halogenated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
- B29C48/2715—Cleaning; Purging; Avoiding contamination of plasticising units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/29—Feeding the extrusion material to the extruder in liquid form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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Abstract
The invention discloses a high-strength CPVC high-voltage power protective sleeve which comprises the following raw materials in parts by weight: CPVC resin, PVC resin, nano calcium carbonate, carbon fiber, modified talcum powder, glass fiber, plasticizer, heat stabilizer, ultraviolet absorbent and antioxidant, the tensile strength and the bending strength of the CPVC high-voltage power protective sleeve can be enhanced by mixing the CPVC resin and the PVC resin, the impact strength of the protective tube can be greatly enhanced by the carbon fiber and the nano calcium carbonate, the cold resistance and the weather resistance of the protective tube can also be improved, the modified talcum powder is formed by the reaction of ethanol and diphenylmethane diisocyanate and hydroxyl on the surface of the talcum powder, a powerful chemical bond is formed, the characteristics of the layered structure of the talcum powder are combined, the impact strength of the CPVC high-voltage power protective sleeve is increased while the rigidity is increased, the effect of increasing rigidity and toughness is achieved, and the service life of the CPVC high-voltage power protective sleeve can be prolonged by the heat stabilizer and the ultraviolet absorbent.
Description
Technical Field
The invention belongs to the technical field of power cables, and particularly relates to a high-strength CPVC high-voltage power protective sleeve.
Background
With the development of urban construction in China, the construction of underground pipelines, particularly the laying of electric power protective sleeves, has become an indispensable important link for urban construction.
The CPVC high-voltage power protective sleeve is made of CPVC resin and PVC resin which are main raw materials, the CPVC power pipe is usually used as a cable protective pipe, the performance of the product is greatly superior to that of the traditional asbestos cable calandria and common PVC pipes, the CPVC high-voltage power protective sleeve is an ideal substitute of the traditional power cable protective sleeve, and the CPVC high-voltage power protective sleeve is widely used for building and transforming urban power grids; urban municipal engineering reconstruction; civil aviation airport engineering construction, engineering park and community engineering construction; the urban street lamp cable laying for traffic and road and bridge engineering construction plays a role in guiding and protecting.
For example, patent application No. (CN201610432362.7) discloses a high impact strength electric power pipe material, which comprises polyvinyl chloride resin, chlorinated polyvinyl chloride, polyvinyl chloride with high polymerization degree, heat-resistant plasticizer: 0-30 parts of a solvent; the high-impact-resistance high-strength electric power pipe material is modified by polylactic acid, a filling agent, a heat stabilizer, a lubricant, a processing aid, a plastic modifier and molybdenum chrome red, and has high impact resistance and high heat resistance, but the existing high-strength CPVC high-voltage electric power protective sleeve has the following defects in the preparation process and the connection process:
1. the existing high-strength CPVC high-voltage power sheath is easy to age, deform, crack and the like after being exposed on the ground for a long time, has the defects of poor weather resistance, temperature resistance and mechanical impact resistance, wastes time and labor in maintenance and replacement when the high-strength CPVC high-voltage power sheath is damaged, and increases the use cost of the high-strength CPVC high-voltage power sheath;
2. current high strength CPVC high voltage electricity sheath is in the preparation process, when extruding through screw extruder, the extrusion screw rod plays the transport effect to the raw materials, can not play the effect of mixing stirring to the raw materials in the extruder barrel, the raw materials that make to extrude can not in time stir the mixture at the extrusion in-process, lead to the raw materials to agglomerate easily at the extrusion in-process, influence the processingquality of high strength CPVC high voltage electricity sheath, putty and sizing take place easily in current extruder feeding chamber simultaneously, influence the process progress of high strength CPVC high voltage electricity sheath.
Disclosure of Invention
The invention aims to provide a high-strength CPVC high-voltage power protective sleeve to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength CPVC high-voltage power protective sleeve comprises the following raw materials in parts by weight: 70-80 parts of CPVC resin, 15-20 parts of PVC resin, 6-8 parts of nano calcium carbonate, 10-12 parts of carbon fiber, 3-5 parts of modified talcum powder, 3-5 parts of glass fiber, 3-5 parts of plasticizer, 3-5 parts of heat stabilizer, 1-2 parts of ultraviolet absorbent and 3-5 parts of antioxidant;
the preparation method of the high-strength CPVC high-voltage power protective sleeve comprises the following steps:
the method comprises the following steps: introducing the CPVC resin and the PVC resin into a high-speed mixer according to the parts by weight, mixing at the rotating speed of 120r/min for 100-80 ℃ for 30-40 minutes, heating the mixing temperature to 80-90 ℃, fully mixing and dissolving the CPVC resin and the PVC resin, adding modified talcum powder and carbon fiber into the high-speed mixer, continuously mixing for 10-20 minutes at the rotating speed of 180r/min for 160-180r/min in the high-speed mixer, and after mixing, leading out the raw materials in the high-speed mixer, and naturally cooling to normal temperature to obtain a mixed base material A of the CPVC resin and the PVC resin;
step two: adding the nano calcium carbonate into another high-speed mixer, heating to 50-60 ℃, stirring the nano calcium carbonate for 20-30 minutes at the rotating speed of 80-120r/min by the high-speed mixer, uniformly dispersing the nano calcium carbonate in the water bath of the high-speed mixer, sequentially adding a plasticizer, a heat stabilizer, an ultraviolet absorbent and an antioxidant into the high-speed mixer, fully stirring at the rotating speed of 300-400r/min in the high-speed mixer for 40-50 minutes, and cooling to normal temperature to obtain a mixed auxiliary material B;
step three: introducing the mixed auxiliary material B obtained in the step two into the mixed base material A obtained in the step one, stirring the mixed base material A for 30-40 minutes by a high-speed mixer at the rotating speed of 200-240r/min, adding glass fibers in the stirring process to obtain a uniformly mixed primary mixed material, and keeping the temperature in the high-speed mixer at 90-110 ℃ to obtain a molten CPVC high-voltage electric power sheath pipe molding raw material;
step four: the CPVC high-voltage electric power protective sleeve forming raw material in a molten state obtained in the third step is introduced into a feeding cavity of a double-screw extruder through a vacuum material sucking device, a stirring shaft is driven by a stirring motor to drive a packing auger and a stirring rod to rotate, so that the raw material in the feeding cavity is quickly introduced into an extruding cylinder, the raw material in the extruding cylinder is heated by a cast aluminum heating sleeve on the extruding cylinder, a rotating shaft II is driven by a servo motor to rotate, the rotating shaft II drives a gear I to carry out meshing transmission through the gear II, so that the rotating shaft I and the rotating shaft II respectively drive a first extruding screw rod and a second extruding screw rod to rotate, so that the raw material in the extruding cylinder is subjected to differential mixing in the extruding process of the two pairs of raw materials of the helical blade I and the helical blade I, and the further mixed raw material in the extruding cylinder is extruded through an extruding die head;
step five: and (3) adhering the pipe blank obtained in the fourth step to a traction pipe, starting a traction machine to slowly introduce the pipe blank into a vacuum setting machine, cooling the set pipe blank by using 15-30 ℃ spray water in the vacuum setting machine, and cutting at fixed length to obtain the high-strength CPVC high-voltage power sheath pipe.
As a further scheme of the invention: the diameter of the carbon fiber is 7 μm, and the length is 0.5-1 mm.
As a still further scheme of the invention: the plasticizer is a mixture of dioctyl phthalate and di-sec-octyl phthalate, and the weight ratio of the dioctyl phthalate to the di-sec-octyl phthalate is 2: 1.
as a still further scheme of the invention: the heat stabilizer is a mixture of an organic tin stabilizer and a composite lead organic tin stabilizer, and the weight ratio of the organic tin stabilizer to the composite lead organic tin stabilizer is 2: 1.
As a still further scheme of the invention: the ultraviolet absorbent is one or a mixture of more than two of ultraviolet absorbent UV-P, ultraviolet absorbent UV-O, ultraviolet absorbent UV-9 and ultraviolet absorbent UVP-327.
As a still further scheme of the invention: the antioxidant is a mixture of an antioxidant 1076 and an antioxidant 1010, and the weight ratio of the antioxidant 1076 to the antioxidant 1010 is 3: 1.
As a still further scheme of the invention: the modified talcum powder is prepared by mixing talcum powder, ethanol and diphenylmethane diisocyanate according to the mass part ratio of 100: 50: 30 is added into a reactor, stirred for 1 to 2 hours at the rotating speed of 100 plus 120r/min, the temperature of the system is maintained at 90 to 100 ℃, reduced pressure distillation is carried out for 40 to 50 minutes at minus 0.07MPa, and the talcum powder is dried for 3 to 5 hours in an oven at the temperature of 100 plus 120 ℃ to obtain the modified talcum powder.
As a still further scheme of the invention: the particle size of the modified talcum powder is 1.5-2 μm.
As a still further scheme of the invention: when the double-screw extruder is used, the CPVC high-voltage electric power sheath pipe forming raw materials in a molten state are introduced into a feeding cavity, a stirring shaft is driven by a stirring motor to drive a packing auger and a stirring rod to rotate, so that the raw materials in the feeding cavity are quickly introduced into an extruding cylinder, the raw materials in the extruding cylinder are heated by a cast aluminum heating sleeve on the extruding cylinder, a rotating shaft II is driven by a servo motor to rotate, the rotating shaft II drives a gear I to perform meshing transmission through the gear II, the rotating shaft I is driven to rotate, the rotating shaft I and the rotating shaft II respectively drive an extruding screw I and an extruding screw II to rotate, so that the raw materials in the extruding cylinder are subjected to differential mixing in the extruding process of the raw materials of the screw blade I and the screw blade II, and the raw materials further mixed in the extruding cylinder are extruded through an extruding die head to obtain a.
Compared with the prior art, the invention has the beneficial effects that:
1. the tensile strength of CPVC high voltage electricity protecting pipe can be strengthened with the mixture of CPVC resin and PVC resin, bending strength, the impact strength of protection tube can be strengthened greatly to carbon fiber and nano calcium carbonate, can also improve the cold-resistant and the weatherability of protection tube, modified talcum powder is by the hydroxyl reaction on ethanol and diphenylmethane diisocyanate and talcum powder surface, form powerful chemical bond, combine the lamellar structure characteristics of talcum powder itself, make CPVC high voltage electricity protecting pipe impact strength increase when the rigidity increases, reach the effect of increasing rigidity and keeping tough, can improve the life of CPVC high voltage electricity protecting pipe through heat stabilizer and ultraviolet absorbent, the toughness of CPVC high voltage electricity protecting pipe is further improved to the plasticizer, test according to GB/T15142-2001 through shock resistance: the impact strength is more than or equal to 90KJ/m2, the tensile yield strength is more than or equal to 100MPa, and the elastoplasticity is tested according to ISO 527-2: the elastic-plastic property is more than or equal to 700MPa, and the ring rigidity is 65 kPa;
2. the CPVC high-voltage power protective sleeve forming raw material in a molten state is guided into a feeding cavity, a stirring shaft is driven by a stirring motor to drive an auger and a stirring rod to rotate, the raw material is enabled to enter an extruding cylinder more quickly under the conveying action of the auger on the raw material, meanwhile, the inner wall of the feeding cavity is scraped by the stirring rod, the raw material is effectively prevented from being bonded on the inner wall of the feeding cavity, the cleaning times of an operator on the feeding cavity are reduced, a rotating shaft II is driven by a servo motor to rotate, the rotating shaft II drives a gear I to be meshed and driven by the gear II, so that a rotating shaft I is driven to rotate, the rotating shaft I and the rotating shaft II respectively drive an extruding screw I and an extruding screw II to rotate, differential mixing of the raw material in the extruding cylinder is realized in the extruding process of two pairs of raw materials of a helical blade I and a helical blade, and real-time, the extrusion quality of the raw materials in the extrusion cylinder is improved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a twin-screw extruder.
FIG. 2 is a main view of a twin screw extruder.
FIG. 3 is a schematic view of the structure of an extrusion barrel in a twin-screw extruder.
FIG. 4 is a schematic diagram of the structure of a feed chamber in a twin-screw extruder.
FIG. 5 is a schematic view showing the structure of twin screws in the twin-screw extruder.
In the figure: the device comprises a base 1, a heat dissipation plate 101, a heat dissipation fan 102, an air outlet 103, an extrusion cavity 2, an extrusion die head 201, an extrusion cylinder 202, a cast aluminum heating jacket 203, a motor installation box 204, a support seat 205, a connecting cylinder 206, a first screw installation hole 207, a second screw installation hole 208, a coupler 209, a servo motor 210, a first extrusion screw 211, a first screw blade 212, a second extrusion screw blade 213, a second screw blade 214, a first rotating shaft 215, a second rotating shaft 216, a first gear 217, a second gear 218, a feeding cavity 3, a stirring motor 301, a stirring shaft 302, an auger 303 and a stirring rod 304.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, in an embodiment of the present invention, a high-strength CPVC high-voltage power sheath pipe includes the following raw materials in parts by weight: 75 parts of CPVC resin, 17.5 parts of PVC resin, 7 parts of nano calcium carbonate, 11 parts of carbon fiber, 4 parts of modified talcum powder, 4 parts of glass fiber, 4 parts of plasticizer, 4 parts of heat stabilizer, 1.5 parts of ultraviolet absorbent and 4 parts of antioxidant;
the preparation method of the high-strength CPVC high-voltage power protective sleeve comprises the following steps:
the method comprises the following steps: introducing the CPVC resin and the PVC resin into a high-speed mixer according to the parts by weight, mixing at the rotating speed of 120r/min for 30-40 minutes at the mixing temperature of 70-80 ℃, fully mixing and dissolving the CPVC resin and the PVC resin, adding modified talcum powder and carbon fiber into the high-speed mixer, continuously mixing for 10-20 minutes at the rotating speed of 180r/min for 160-180r/min in the high-speed mixer, heating the mixing temperature to 80-90 ℃, and after mixing, leading out the raw materials in the high-speed mixer and naturally cooling to normal temperature to obtain a mixed base material A of the CPVC resin and the PVC resin;
step two: adding the nano calcium carbonate into another high-speed mixer, heating to 50-60 ℃, stirring the nano calcium carbonate for 20-30 minutes at the rotating speed of 80-120r/min by the high-speed mixer, uniformly dispersing the nano calcium carbonate in the water bath of the high-speed mixer, sequentially adding a plasticizer, a heat stabilizer, an ultraviolet absorbent and an antioxidant into the high-speed mixer, fully stirring at the rotating speed of 300-400r/min in the high-speed mixer for 40-50 minutes, and cooling to normal temperature to obtain a mixed auxiliary material B;
step three: introducing the mixed auxiliary material B obtained in the step two into the mixed base material A obtained in the step one, stirring the mixed base material A for 30-40 minutes by a high-speed mixer at the rotating speed of 200-240r/min, adding glass fibers in the stirring process to obtain a uniformly mixed primary mixed material, and keeping the temperature in the high-speed mixer at 90-110 ℃ to obtain a molten CPVC high-voltage electric power sheath pipe molding raw material;
step four: the CPVC high-voltage electric power sheath pipe forming raw material in a molten state obtained in the third step is introduced into a feeding cavity 3 of a double-screw extruder through a vacuum material sucking device, a stirring shaft 302 is driven by a stirring motor 301 to drive a packing auger 303 and a stirring rod 304 to rotate, so that the raw material in the feeding cavity 3 is rapidly introduced into an extruding cylinder 202, the raw material in the extruding cylinder 202 is heated by a cast aluminum heating sleeve 203 on the extruding cylinder 202, a rotating shaft II 216 is driven by a servo motor 210 to rotate, the rotating shaft II 216 drives a gear I217 to engage and drive through a gear II 218, so as to drive a rotating shaft I215 to rotate, the rotating shaft I215 and the rotating shaft II 216 respectively drive an extruding screw I211 and an extruding screw II 213 to rotate, so that the screw blade I212 and the screw blade II 214 realize differential mixing of the raw material in the extruding cylinder 202 in the raw material extruding process, the raw material further mixed in the extruding cylinder 202 is extruded through an extruding die, obtaining a tube blank;
step five: and (3) adhering the pipe blank obtained in the fourth step to a traction pipe, starting a traction machine to slowly introduce the pipe blank into a vacuum setting machine, cooling the set pipe blank by using 15-30 ℃ spray water in the vacuum setting machine, and cutting at fixed length to obtain the high-strength CPVC high-voltage power sheath pipe.
The diameter of the carbon fiber is 7 μm, and the length is 0.5-1 mm.
The plasticizer is a mixture of dioctyl phthalate and di-sec-octyl phthalate, and the weight ratio of the dioctyl phthalate to the di-sec-octyl phthalate is 2: 1.
the heat stabilizer is a mixture of an organic tin stabilizer and a composite lead organic tin stabilizer, and the weight ratio of the organic tin stabilizer to the composite lead organic tin stabilizer is 2: 1.
The ultraviolet absorbent is one or a mixture of more than two of ultraviolet absorbent UV-P, ultraviolet absorbent UV-O, ultraviolet absorbent UV-9 and ultraviolet absorbent UVP-327.
The antioxidant is a mixture of an antioxidant 1076 and an antioxidant 1010, and the weight ratio of the antioxidant 1076 to the antioxidant 1010 is 3: 1.
The modified talcum powder is prepared by mixing talcum powder, ethanol and diphenylmethane diisocyanate according to the mass part ratio of 100: 50: 30 is added into a reactor, stirred for 1 to 2 hours at the rotating speed of 100 plus 120r/min, the temperature of the system is maintained at 90 to 100 ℃, reduced pressure distillation is carried out for 40 to 50 minutes at minus 0.07MPa, and the talcum powder is dried for 3 to 5 hours in an oven at the temperature of 100 plus 120 ℃ to obtain the modified talcum powder.
The particle size of the modified talcum powder is 1.5-2 μm.
When the twin-screw extruder in the step five is used, the molding raw material of the CPVC high-voltage electric sheath tube in a molten state is introduced into the feeding cavity 3, the stirring shaft 302 is driven by the stirring motor 301 to drive the auger 303 and the stirring rod 304 to rotate, so that the raw material in the feeding cavity 3 is rapidly introduced into the extruding cylinder 202, the raw material in the extruding cylinder 202 is heated by the cast aluminum heating sleeve 203 on the extruding cylinder 202, the rotating shaft two 216 is driven by the servo motor 210 to rotate, the rotating shaft two 216 drives the gear one 217 to mesh and drive through the gear two 218, so as to drive the rotating shaft one 215 to rotate, the rotating shaft one 215 and the rotating shaft two 216 respectively drive the extruding screw one 211 and the extruding screw two 213 to rotate, so that the screw blade one 212 and the screw blade two 214 realize differential mixing of the raw material in the extruding cylinder 202 in the raw material extruding process, and the further mixed raw material in the extruding cylinder 202 is extruded through the extrusion, obtaining the tube blank.
The double-screw extruder comprises a base 1, wherein the base 1 is of a square structure, an extrusion cavity 2 is horizontally arranged on the surface of the base 1, an extrusion cylinder 202 is horizontally arranged inside the extrusion cavity 2, a motor installation box 204 is fixedly arranged on the surface of one end of the extrusion cavity 2, a servo motor 210 is fixedly arranged inside the motor installation box 204, a feeding cavity 3 is fixedly arranged at one end, close to the motor installation box 204, of the top surface of the extrusion cavity 2, and a discharge hole of the feeding cavity 3 penetrates through the top surface of the extrusion cavity 2 and is connected to a feed hole of the extrusion cylinder 202;
the end face of the extrusion cylinder 202 is fixedly provided with a connecting cylinder 206, the end face of the connecting cylinder 206 is provided with a first screw mounting hole 207 and a second screw mounting hole 208 in parallel, the interior of the extrusion cylinder 202 is provided with a first extrusion screw 211 and a second extrusion screw 213 in parallel, the first extrusion screw 211 is provided with a first helical blade 212, the second extrusion screw 213 is provided with a second helical blade 214, one ends of the first extrusion screw 211 and the second extrusion screw 213 respectively penetrate through the first screw mounting hole 207 and the second screw mounting hole 208 on the connecting cylinder 206 and are connected with a first rotating shaft 215 and a second rotating shaft 216 through a coupler 209, the other ends of the first rotating shaft 215 and the second rotating shaft 216 are respectively provided with the interior of the motor mounting box 204, the other end of the second rotating shaft 216 is fixedly connected with the output end of the servo motor 210, and the first rotating shaft 215 and the second rotating shaft 216 which are positioned in the motor mounting box 204 are provided with a first, the first gear 217 is in meshed connection with the second gear 218;
the first spiral blade 212 and the second spiral blade 214 have a larger radius of rotation and a smaller radius of rotation;
the extrusion cylinder 202 is erected inside the extrusion cavity 2 through support seats 205 on two sides, a plurality of groups of cast aluminum heating jackets 203 are arranged on the outer cylinder wall of the extrusion cylinder 202, and an extrusion die head 201 is fixedly arranged on the end face of the other end of the extrusion cylinder 202;
the feeding cavity 3 is of a cylindrical structure, the bottom of the feeding cavity 3 is of a horn-shaped structure, a stirring motor 301 is fixedly arranged on the surface of the feeding cavity 3 through a motor mounting seat, the output end of the stirring motor 301 is fixedly connected with a stirring shaft 302, the stirring shaft 302 is positioned inside the feeding cavity 3, an auger 303 and two stirring rods 304 are arranged on the stirring shaft 302, the number of the stirring rods 304 is two, the two stirring rods 304 are symmetrical about the axis of the stirring shaft 302, and the surface of each stirring rod 304 is abutted against the wall of the feeding cavity 3;
a plurality of air coolers 102 are arranged on the top surface of the interior of the machine base 1, and output end pipelines of the air coolers 102 are arranged inside the extrusion cavity 2 through air outlets 103.
The working principle of the double-screw extruder is as follows: the CPVC high-voltage electric power sheath pipe forming raw material in a molten state is led into a feeding cavity 3, a stirring shaft 302 is driven by a stirring motor 301 to drive a packing auger 303 and a stirring rod 304 to rotate, so that the raw material in the feeding cavity 3 is led into an extruding cylinder 202 quickly, the raw material in the extruding cylinder 202 is heated by a cast aluminum heating sleeve 203 on the extruding cylinder 202, a second rotating shaft 216 is driven by a servo motor 210 to rotate, the second rotating shaft 216 drives a first gear 217 to carry out meshing transmission through a second gear 218, so that the first rotating shaft 215 is driven to rotate, the first rotating shaft 215 and the second rotating shaft 216 respectively drive a first extruding screw rod 211 and a second extruding screw rod 213 to rotate, so that the first helical blade 212 and the second helical blade 214 realize differential mixing of the raw material in the extruding cylinder 202 in the raw material extruding process, and the further mixed raw material in the extruding cylinder 202 is extruded through an extruding die head 201, and.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The high-strength CPVC high-voltage power protective sleeve is characterized by comprising the following raw materials in parts by weight: 70-80 parts of CPVC resin, 15-20 parts of PVC resin, 6-8 parts of nano calcium carbonate, 10-12 parts of carbon fiber, 3-5 parts of modified talcum powder, 3-5 parts of glass fiber, 3-5 parts of plasticizer, 3-5 parts of heat stabilizer, 1-2 parts of ultraviolet absorbent and 3-5 parts of antioxidant;
the preparation method of the high-strength CPVC high-voltage power protective sleeve comprises the following steps:
the method comprises the following steps: introducing the CPVC resin and the PVC resin into a high-speed mixer according to the parts by weight, mixing at the rotating speed of 120r/min for 30-40 minutes at the mixing temperature of 70-80 ℃, fully mixing and dissolving the CPVC resin and the PVC resin, adding modified talcum powder and carbon fiber into the high-speed mixer, continuously mixing for 10-20 minutes at the rotating speed of 180r/min for 160-180r/min in the high-speed mixer, heating the mixing temperature to 80-90 ℃, and after mixing, leading out the raw materials in the high-speed mixer and naturally cooling to normal temperature to obtain a mixed base material A of the CPVC resin and the PVC resin;
step two: adding the nano calcium carbonate into another high-speed mixer, heating to 50-60 ℃, stirring the nano calcium carbonate for 20-30 minutes at the rotating speed of 80-120r/min by the high-speed mixer, uniformly dispersing the nano calcium carbonate in the water bath of the high-speed mixer, sequentially adding a plasticizer, a heat stabilizer, an ultraviolet absorbent and an antioxidant into the high-speed mixer, fully stirring at the rotating speed of 300-400r/min in the high-speed mixer for 40-50 minutes, and cooling to normal temperature to obtain a mixed auxiliary material B;
step three: introducing the mixed auxiliary material B obtained in the step two into the mixed base material A obtained in the step one, stirring the mixed base material A for 30-40 minutes by a high-speed mixer at the rotating speed of 200-240r/min, adding glass fibers in the stirring process to obtain a uniformly mixed primary mixed material, and keeping the temperature in the high-speed mixer at 90-110 ℃ to obtain a molten CPVC high-voltage electric power sheath pipe molding raw material;
step four: the CPVC high-voltage electric sheath forming raw material in a molten state obtained in the third step is introduced into a feeding cavity (3) of a double-screw extruder through a vacuum material sucking device, a stirring shaft (302) is driven by a stirring motor (301) to drive a packing auger (303) and a stirring rod (304) to rotate, so that the raw material in the feeding cavity (3) is rapidly introduced into an extruding cylinder (202), the raw material in the extruding cylinder (202) is heated through a cast aluminum heating sleeve (203) on the extruding cylinder (202), a rotating shaft II (216) is driven by a servo motor (210) to rotate, the rotating shaft II (216) drives a gear I (217) to be meshed and driven through the gear II (218), so that a rotating shaft I (215) is driven to rotate, the rotating shaft I (215) and the rotating shaft II (216) respectively drive the extruding screw I (211) and the extruding screw II (213) to rotate, and the mixing of the raw material in the extruding cylinder (202) is realized in the raw material extruding process through a spiral blade I (212) and a spiral blade II (214) Extruding the raw materials further mixed in the extrusion cylinder (202) through an extrusion die head (201) to obtain a tube blank;
step five: and (3) adhering the pipe blank obtained in the fourth step to a traction pipe, starting a traction machine to slowly introduce the pipe blank into a vacuum setting machine, cooling the set pipe blank by using 15-30 ℃ spray water in the vacuum setting machine, and cutting at fixed length to obtain the high-strength CPVC high-voltage power sheath pipe.
2. A high strength CPVC high voltage power sheath as claimed in claim 1, wherein said carbon fiber has a diameter of 7 μm and a length of 0.5-1 mm.
3. A high strength CPVC high voltage power sheath tube as claimed in claim 1, wherein the plasticizer is a mixture of dioctyl phthalate and di-sec-octyl phthalate, the weight ratio of the two is 2: 1.
4. a high strength CPVC high voltage power sheath according to claim 1, wherein the heat stabilizer is a mixture of organotin stabilizers and lead-rich organotin stabilizers, the weight ratio between them is 2: 1.
5. A high strength CPVC high voltage power sheath tube as claimed in claim 1, wherein the UV absorber is one or a mixture of more than two of UV absorber UV-P, UV absorber UV-O, UV absorber UV-9, and UV absorber UVP-327.
6. The high-strength CPVC high-voltage power sheath pipe as claimed in claim 1, wherein the antioxidant is a mixture of antioxidant 1076 and antioxidant 1010, and the weight ratio of the antioxidant 1076 to the antioxidant 1010 is 3: 1.
7. The high-strength CPVC high-voltage power sheath pipe as claimed in claim 1, wherein the modified talcum powder is prepared by mixing talcum powder, ethanol and diphenylmethane diisocyanate in a mass ratio of 100: 50: 30 is added into a reactor, stirred for 1 to 2 hours at the rotating speed of 100 plus 120r/min, the temperature of the system is maintained at 90 to 100 ℃, reduced pressure distillation is carried out for 40 to 50 minutes at minus 0.07MPa, and the talcum powder is dried for 3 to 5 hours in an oven at the temperature of 100 plus 120 ℃ to obtain the modified talcum powder.
8. A high strength CPVC high voltage power sheath tube as claimed in claim 7, wherein the particle size of said modified talc powder is 1.5-2 μm.
9. A high-strength CPVC high-voltage power sheath pipe as claimed in claim 1, wherein in the fifth step, the twin-screw extruder is used to introduce the molten CPVC high-voltage power sheath pipe molding raw material into the feeding cavity (3), the stirring shaft (302) is driven by the stirring motor (301) to drive the screw conveyor (303) and the stirring rod (304) to rotate, so that the raw material in the feeding cavity (3) is rapidly introduced into the extruding cylinder (202), the raw material in the extruding cylinder (202) is heated by the cast aluminum heating jacket (203) on the extruding cylinder (202), the second rotating shaft (216) is driven by the servo motor (210) to rotate, the second rotating shaft (216) drives the first gear (217) to mesh and drive the first rotating shaft (215) to rotate, and the first rotating shaft (215) and the second rotating shaft (216) respectively drive the first extruding screw (211) and the second extruding screw (213) to rotate, and (3) realizing differential mixing of the raw materials in the extrusion cylinder (202) in the process of extruding the raw materials by the first helical blade (212) and the second helical blade (214), and extruding the further mixed raw materials in the extrusion cylinder (202) through the extrusion die head (201) to obtain a tube blank.
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| CN201911076808.7A CN110760146A (en) | 2019-11-06 | 2019-11-06 | High strength CPVC high voltage electricity protecting pipe |
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