CN112266521A - PE gas pipe with high chronic crack resistance and preparation method thereof - Google Patents
PE gas pipe with high chronic crack resistance and preparation method thereof Download PDFInfo
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
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Abstract
The invention discloses a PE gas pipe with high chronic crack resistance and a preparation method thereof, wherein the PE gas pipe with high chronic crack resistance is prepared by mixing, extruding, cooling and shaping modified PE resin powder, lubricating filler, ammonium polyphosphate, antioxidant and ultraviolet stabilizer; the modified PE resin powder is obtained by mixing MDPE resin powder with filler talcum powder, internal lubricant vinyl distearamide and compatibilizer maleic acid grafted polyethylene, extruding and granulating, and on the basis of keeping the tensile strength, cracking resistance and thermal stability of the MDPE resin, the extruded PE modified resin keeps the hardness of the surface and the inside and improves the performance of resisting chronic cracks; the hardness, smoothness and heat-resistant flame retardance of the gas pipe are further increased by adding the lubricating filler.
Description
Technical Field
The invention relates to the technical field of PE gas pipes, in particular to a PE gas pipe with high chronic crack resistance and a preparation method thereof.
Background
The PE gas pipeline must guarantee the service life of more than 50 years, so the PE gas pipeline has high requirements on the selection of raw materials, the processing of pipes, pipe fittings and matching parts and construction technology. Polyethylene (PE) pipelines have a plurality of excellent properties such as low temperature resistance, toughness, corrosion resistance, weldability, trenchless directional drilling and the like, and particularly have rapid crack transfer resistance, so that the PE pipelines become the preferred materials for urban low-pressure buried gas pipes.
According to the requirements of international standard ISO 4437:2007 and European standard EN 1555-1:2010, the raw materials for producing the buried PE pipe for fuel gas are prepared by mixing basic PE resin and additives, such as an antioxidant, a pigment, carbon black, an ultraviolet stabilizer and the like, and then extruding the mixture. At present, the raw material of the polyethylene gas pipe must be a special black or yellow material, and the raw material must have proper carbon black content and carbon black dispersion degree, and the medium density polyethylene and the high density polyethylene resin of PE80 and PE100 are mainly used as the raw materials.
The prior art (CN109206710A) discloses a production process of a PE pipe for buried fuel gas, which comprises the following steps: (1) mixing, namely selecting PE resin powder, a clay nano composite material, a flame retardant, polyethylene wax, an antistatic agent, a low-temperature-resistant plasticizer and a coupling agent according to the proportion; (2) mixing materials; (3) extruding; (4) cooling and shaping to obtain a PE base pipe; (5) preparing a wear-resistant layer; (6) and hot pressing, namely uniformly hot-pressing and coating the wear-resistant layer on the outer surface of the PE base pipe. The prepared PE pipe has good impact resistance, wear resistance and service life. The research shows that the following technical problems exist: 1) the PE gas pipe obtained by compounding conventional PE resin powder, filler and functional additive cannot achieve good tensile strength, hardness and chronic crack resistance, and has potential safety hazard in use; 2) the efficiency of feeding and discharging is low during cooling and shaping, the cooling is insufficient, the cooling efficiency is low, the range of the blowing angle is small during drying, and the overall processing efficiency of the gas pipe is reduced.
Disclosure of Invention
In order to overcome the technical problems described above, the present invention aims to provide a PE gas pipe with high resistance to chronic cracking and a method for manufacturing the same:
the PE gas pipe with high chronic crack resistance is prepared by mixing, extruding, cooling and shaping modified PE resin powder, lubricating filler, flame retardant ammonium polyphosphate, antioxidant and ultraviolet stabilizer; the modified PE resin powder is obtained by mixing MDPE resin powder with filler talcum powder, internal lubricant vinyl distearamide and compatibilizer maleic acid grafted polyethylene, extruding and granulating, and on the basis of keeping the tensile strength, cracking resistance and thermal stability of the MDPE resin, the maleic acid grafted polyethylene is used as an active component to form a network system, so that the compatibility of the PE resin powder with the talcum powder and the internal lubricant is improved, the surface hardness and the internal hardness of the extruded PE modified resin are kept, and the performance of resisting chronic cracks is improved; the hardness, smoothness and heat-resistant flame retardance of the gas pipe are further increased by adding the lubricating filler.
The pipe base materials are more stable in the traction and transmission process, the transmission efficiency is improved, and the whole processing speed is accelerated by the traction of the plurality of transmission wheels and the arrangement of the V-shaped groove in the middle of the supporting panel; cold water is sprayed to the pipe base material in multiple directions through a plurality of water spray heads, so that the cooling efficiency is accelerated; the pipe base material is fully dried by the arranged hot air blower, the whole drying speed is accelerated by the hot air and the inwards concave first baffle, and the processing efficiency is improved; by arranging the air cooling mechanism, the tube base material is further cooled, so that insufficient cooling and incomplete shaping are avoided, and meanwhile, the potential safety hazard of manual operation is also avoided; the bearing plate is pushed to the cylinder so that the efficiency of collecting products is further improved, labor is saved, and the whole processing efficiency is improved.
The purpose of the invention can be realized by the following technical scheme:
the PE gas pipe with high chronic crack resistance comprises the following raw materials in parts by weight: 130 parts of modified PE resin powder 110-20 parts of lubricating filler, 1.5-3 parts of ammonium polyphosphate, 1.2-2.6 parts of antioxidant and 0.5-1.3 parts of ultraviolet stabilizer;
the preparation method of the PE gas pipe with high chronic crack resistance comprises the following steps:
step one, mixing materials: weighing 130 parts of modified PE resin powder 110-one, 12-20 parts of lubricating filler, 1.5-3 parts of ammonium polyphosphate, 1.2-2.6 parts of antioxidant and 0.5-1.3 parts of ultraviolet stabilizer according to parts by weight, putting into a mixer, and uniformly stirring at 200r/min for 100-one to obtain a mixture;
step two, extrusion: the mixture is sent into a pipe extruder to be extruded to obtain a pipe base material, wherein the temperature of a charging barrel of the extruder is 190 ℃ plus 180 ℃, and the temperature of a die is 220 ℃ plus 210 ℃;
step three, cooling and shaping: feeding a pipe base material from a feed inlet of cooling and shaping equipment, starting a first motor to drive a conveying wheel to rotate, drawing the pipe base material, drawing by a conveying mechanism, stopping the first motor when the whole pipe base material enters a water spraying area, opening a valve II in a water tank, allowing cold water to pass through a first water pipe, a second water pipe, a third water pipe and a water conveying plate and be sprayed out from a water spray head, cooling the pipe base material below for the first time, starting the first motor again after the first cooling, drawing the pipe base material to pass through an installation through frame, stopping the first motor after the pipe base material is completely drawn to a drying area, starting a hot air blower to dry the pipe base material, simultaneously opening a valve I on a water outlet pipe to discharge wastewater in the water spraying area into a water collecting bucket, starting the first motor again after the drying, conveying the pipe base material from a discharge outlet to an air cooling mechanism, starting the air conditioner, inputting cold air into the air cooling box, cooling for the second time, opening the sliding door after cooling for the second time, starting the cylinder, pushing the bearing plate to incline, stopping the cylinder after inclining, and allowing the pipe base material to slide into the collecting box for collection.
As a further scheme of the invention: the preparation method of the modified PE resin powder comprises the following steps:
a1: weighing 55-70 parts of MDPE resin powder, 8-16 parts of talcum powder, 2-5 parts of vinyl distearamide and 6-10 parts of maleic acid grafted polyethylene according to parts by weight, and stirring and mixing at the rotating speed of 400-600r/min for 20-30min to obtain a mixture;
a2: feeding the mixture into a double-screw extruder, and extruding and granulating after melting and mixing; wherein the rotation speed of the screw is 300-400r/min, and the melting temperature is 180-195 ℃.
As a further scheme of the invention: the preparation method of the lubricating filler comprises the following steps:
b1: weighing 15-22 parts of white carbon black, 8-13 parts of organic bentonite, 4-7 parts of molybdenum disulfide, 1-3 parts of trimethoxy silane and 0.2-0.6 part of alumina according to parts by weight;
b2: under the protection of nitrogen, sequentially adding white carbon black, molybdenum disulfide and trimethoxy silane into a reaction kettle, stirring for 20-30min, adding organic bentonite and alumina, and continuously stirring for 10-20min to obtain a mixed wet material;
b3: adding the mixed wet material into a vacuum drier, drying for 40-60min at 40-60 ℃, and grinding and crushing to obtain the lubricating filler with 20-30 meshes.
As a further scheme of the invention: the antioxidant is one or a mixture of more of tris (2, 4-di-tert-butylphenyl) phosphite, tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
As a further scheme of the invention: the ultraviolet stabilizer is one or a mixture of 2-hydroxy-4-n-octoxy benzophenone, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole and 2- (4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazine-2-yl) -5-octoxy phenol.
As a further scheme of the invention: the cooling and shaping equipment in the third step comprises a bottom plate, wherein two third supports are arranged on one side of the top of the bottom plate, a water collecting barrel is arranged between the two third supports and on the top of the bottom plate, cooling boxes are arranged on the tops of the two third supports in a matched mode, a conveying mechanism is arranged in each cooling box, a water spraying mechanism is arranged on one side of the top of each cooling box, a drying mechanism is arranged on the other side of the top of each cooling box, an air cooling mechanism is arranged on the other side of the top of the bottom plate, a collecting box is arranged on the front side of each air cooling mechanism, and an air conditioner;
a feed inlet is formed in one end of the cooling box, a discharge outlet is formed in the other end of the cooling box, a partition plate is arranged in the middle of the inside of the cooling box and divides the inside of the cooling box into a water spraying area and a drying area, an installation through frame is formed in the middle of the partition plate, a water outlet pipe is arranged on one side, close to the feed inlet, of the bottom of the cooling box, a first valve is fixedly installed on the water outlet pipe, the water outlet pipe is positioned above a water collecting barrel, a backing plate is fixedly installed in the cooling box, a plurality of fourth supports are arranged at the top of the backing plate at equal intervals and are symmetrically distributed on the transverse central line of the cooling box, a support panel is fixedly installed at the top of the fourth supports, a V-shaped groove is formed in the middle of the support panel, a plurality of empty avoiding grooves are formed in the bottom of the V-shaped groove, a, the utility model discloses a conveying device, including a support frame, a feed inlet, a first pivot and a plurality of second pivot, the support frame top is rotated and is installed a first pivot and a plurality of second pivot, first pivot is located one side of feed inlet, first pivot one end fixed mounting has belt pulley and gear two, the belt pulley is located the inboard of gear two, the meshing of gear two has gear one, a gear fixed mounting is on the output shaft of first motor, first motor fixed mounting is on the backing plate, a plurality of the equal fixed mounting of second pivot one end has the belt pulley, a plurality of connect through belt drive between the belt pulley, equal fixed mounting has two transfer pulleys in first pivot and a plurality of second pivot middle part, the transfer pulley position with keep away empty groove position one-to-one.
As a further scheme of the invention: the water spraying mechanism comprises a water tank, a second valve is arranged inside the water tank, the water tank is installed on one side, close to the feed inlet, of the top of the cooling tank, a first water delivery pipe is connected to the bottom of the water tank, the other end of the first water delivery pipe penetrates through the top of the cooling tank and is connected with a second water delivery pipe, the second water delivery pipe is located inside the cooling tank, a plurality of third water delivery pipes and a plurality of water delivery plates are arranged at the bottom of the second water delivery pipe in an equidistant mode, the other end of the third water delivery pipe is connected with a water delivery plate, and a plurality of water spray heads are arranged at the.
As a further scheme of the invention: the drying mechanism comprises a fixed box, two fixed plates are fixedly connected to the bottom end inside the fixed box, an air heater is installed on one side of each fixed plate, an air port of the air heater penetrates through the bottom of the fixed box and is connected with a first baffle, the first baffle is located inside the cooling box and is of an inward concave structure, and a cover plate is connected to the top of the fixed box through a hinge.
As a further scheme of the invention: the air cooling mechanism comprises an air cooling box, the air cooling box is installed on the bottom plate through two first supports, a discharge door is arranged on one side of the air cooling box, the discharge door is provided with a sliding door, the top, close to one side of the sliding door, of the bottom plate is provided with a collecting box, the top, far away from one side of the sliding door, of the bottom plate is provided with an air conditioner, the air conditioner comprises an air conditioner main body, the top of the air conditioner main body is provided with a cold air pipe and a hot air pipe, the cold air pipe penetrates through the air cooling box and extends to the inside, one side of the bottom end inside the air cooling box is provided with a second support, the bottom of one side of the support plate is provided with a connecting table, the connecting table is fixedly rotated through a fixing pin and installed on the top of the second support, the bottom of the other side of the support.
As a further scheme of the invention: the preparation method of the PE gas pipe with high chronic crack resistance comprises the following steps:
s1, mixing materials: weighing 130 parts of modified PE resin powder 110-one, 12-20 parts of lubricating filler, 1.5-3 parts of ammonium polyphosphate, 1.2-2.6 parts of antioxidant and 0.5-1.3 parts of ultraviolet stabilizer according to parts by weight, putting into a mixer, and uniformly stirring at 200r/min for 100-one to obtain a mixture;
s2, extrusion: the mixture is sent into a pipe extruder to be extruded to obtain a pipe base material, wherein the temperature of a charging barrel of the extruder is 190 ℃ plus 180 ℃, and the temperature of a die is 220 ℃ plus 210 ℃;
s3, cooling and shaping: feeding a pipe base material from a feed inlet of cooling and shaping equipment, starting a first motor to drive a conveying wheel to rotate, drawing the pipe base material, drawing by a conveying mechanism, stopping the first motor when the whole pipe base material enters a water spraying area, opening a valve II in a water tank, allowing cold water to pass through a first water pipe, a second water pipe, a third water pipe and a water conveying plate and be sprayed out from a water spray head, cooling the pipe base material below for the first time, starting the first motor again after the first cooling, drawing the pipe base material to pass through an installation through frame, stopping the first motor after the pipe base material is completely drawn to a drying area, starting a hot air blower to dry the pipe base material, simultaneously opening a valve I on a water outlet pipe to discharge wastewater in the water spraying area into a water collecting bucket, starting the first motor again after the drying, conveying the pipe base material from a discharge outlet to an air cooling mechanism, starting the air conditioner, inputting cold air into the air cooling box, cooling for the second time, opening the sliding door after cooling for the second time, starting the cylinder, pushing the bearing plate to incline, stopping the cylinder after inclining, and allowing the pipe base material to slide into the collecting box for collection.
The invention has the beneficial effects that:
1. the PE gas pipe with high chronic crack resistance is prepared by mixing, extruding, cooling and shaping modified PE resin powder, lubricating filler, flame retardant ammonium polyphosphate, antioxidant and ultraviolet stabilizer; the modified PE resin powder is obtained by mixing MDPE resin powder with filler talcum powder, internal lubricant vinyl distearamide and compatibilizer maleic acid grafted polyethylene, extruding and granulating, and on the basis of keeping the tensile strength, cracking resistance and thermal stability of the MDPE resin, the maleic acid grafted polyethylene is used as an active component to form a network system, so that the compatibility of the PE resin powder with the talcum powder and the internal lubricant is improved, the surface hardness and the internal hardness of the extruded PE modified resin are kept, and the performance of resisting chronic cracks is improved; the hardness, smoothness and heat-resistant flame retardance of the gas pipe are further increased by adding the lubricating filler.
2. The pipe base materials are more stable in the traction and transmission process, the transmission efficiency is improved, and the whole processing speed is accelerated by the traction of the plurality of transmission wheels and the arrangement of the V-shaped groove in the middle of the supporting panel; cold water is sprayed to the pipe base material in multiple directions through a plurality of water spray heads, so that the cooling efficiency is accelerated; the pipe base material is fully dried by the arranged hot air blower, the whole drying speed is accelerated by the hot air and the inwards concave first baffle, and the processing efficiency is improved; by arranging the air cooling mechanism, the tube base material is further cooled, so that insufficient cooling and incomplete shaping are avoided, and meanwhile, the potential safety hazard of manual operation is also avoided; the bearing plate is pushed to the cylinder so that the efficiency of collecting products is further improved, labor is saved, and the whole processing efficiency is improved.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the cooling and shaping apparatus according to the present invention;
FIG. 2 is a schematic view of the internal structure of the cooling and shaping apparatus according to the present invention;
FIG. 3 is a schematic diagram of a water delivery plate structure of the cooling and shaping apparatus of the present invention;
FIG. 4 is a schematic sectional view of a water spraying area of the cooling and shaping apparatus according to the present invention;
FIG. 5 is a schematic sectional view of the drying section of the cooling and setting apparatus according to the present invention;
FIG. 6 is a schematic view of the overall structure of the air cooling mechanism of the cooling and shaping apparatus according to the present invention.
In the figure: 100. a base plate; 110. a water collection barrel; 200. a cooling tank; 201. a feed inlet; 202. a discharge port; 203. a partition plate; 204. a water outlet pipe; 205. installing a through frame; 210. a water spraying mechanism; 211. a water tank; 212. a first water delivery pipe; 213. a second water delivery pipe; 214. a third water delivery pipe; 215. a water conveyance board; 216. a sprinkler head; 220. a drying mechanism; 221. a fixed box; 222. a cover plate; 223. a fixing plate; 224. a hot air blower; 225. a first baffle plate; 230. an air cooling mechanism; 231. an air-cooling box; 232. a first bracket; 233. sliding the door; 234. a second bracket; 235. fixing and pinning; 236. a connecting table; 237. a cylinder; 238. a carrier plate; 239. a discharge door; 240. a collection box; 260. a third support; 300. an air conditioner; 301. an air conditioner main body; 302. a cold air pipe; 303. a hot air pipe; 400. a transport mechanism; 401. a base plate; 402. a fourth bracket; 403. a support panel; 404. a first motor; 405. a first gear; 406. a second gear; 407. a first rotating shaft; 408. a support frame; 409. a transfer wheel; 410. a belt pulley; 411. a second rotating shaft; 500. a tube substrate.
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. 1-6, the PE gas pipe with high resistance to chronic cracks comprises the following raw materials in parts by weight: 120 parts of modified PE resin powder, 16 parts of lubricating filler, 2 parts of ammonium polyphosphate, 2.2 parts of antioxidant and 1.0 part of ultraviolet stabilizer;
the preparation method of the PE gas pipe with high chronic crack resistance comprises the following steps:
step one, mixing materials: weighing 120 parts of modified PE resin powder, 16 parts of lubricating filler, 2 parts of ammonium polyphosphate, 2.2 parts of antioxidant and 1.0 part of ultraviolet stabilizer according to parts by weight, putting into a mixer, and uniformly stirring at 200r/min to obtain a mixture;
step two, extrusion: sending the mixture into a pipe extruder to be extruded to obtain a pipe base material 500, wherein the temperature of a charging barrel of the extruder is 180 ℃, and the temperature of a die is 210 ℃;
step three, cooling and shaping: feeding the pipe base material 500 from the feeding port 201 of the cooling and shaping equipment, starting the first motor 404 to drive the transmission wheel 409 to rotate, pulling the pipe base material 500 through the transmission mechanism 400, stopping the first motor 404 when the whole pipe base material 500 enters a water spraying area, opening the valve II in the water tank 211, allowing cold water to pass through the first water pipe 212, the second water pipe 213, the third water pipe 214 and the water conveying plate 215 and to be sprayed out from the water spray head 216, cooling the pipe base material 500 below for the first time, starting the first motor 404 again after the first cooling, pulling the pipe base material 500 to pass through the installation through frame 205, stopping the first motor 404 after the pipe base material 500 is completely pulled to a drying area, starting the hot air blower 224, drying the pipe base material 500, simultaneously opening the valve I on the water outlet pipe 204, discharging wastewater in the water spraying area into the water collecting barrel 110, and drying, the first motor 404 is started again to convey the tube base material 500 from the discharge port 202 to the air cooling mechanism 230, the air conditioner 300 is started to input cold air into the air cooling tank 231 for secondary cooling, after the secondary cooling, the sliding door 233 is opened, the air cylinder 237 is started, the bearing plate 238 is pushed to incline the bearing plate 238, after the second cooling, the air cylinder 237 is stopped, and the tube base material 500 slides into the collection box 240 for collection.
The preparation method of the modified PE resin powder comprises the following steps:
a1: weighing 60 parts of MDPE resin powder, 12 parts of talcum powder, 4 parts of vinyl distearamide and 8 parts of maleic acid grafted polyethylene according to parts by weight, and stirring and mixing at the rotating speed of 500r/min for 25min to obtain a mixture;
a2: feeding the mixture into a double-screw extruder, and extruding and granulating after melting and mixing; wherein the rotating speed of the screw is 350r/min, and the melting temperature is 180 ℃.
The preparation method of the lubricating filler comprises the following steps:
b1: weighing 18 parts of white carbon black, 10 parts of organic bentonite, 6 parts of molybdenum disulfide, 2 parts of trimethoxy silane and 0.4 part of alumina according to parts by weight;
b2: under the protection of nitrogen, sequentially adding white carbon black, molybdenum disulfide and trimethoxy silane into a reaction kettle, stirring for 25min, adding organic bentonite and alumina, and continuously stirring for 15min to obtain a mixed wet material;
b3: and adding the mixed wet material into a vacuum drier, drying for 50min at 50 ℃, and grinding and crushing to obtain the 25-mesh lubricating filler.
The antioxidant is one or a mixture of more of tris (2, 4-di-tert-butylphenyl) phosphite, tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
The ultraviolet stabilizer is one or a mixture of 2-hydroxy-4-n-octoxy benzophenone, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole and 2- (4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazine-2-yl) -5-octoxy phenol.
The cooling and shaping equipment in the third step comprises a bottom plate 100, wherein two third supports 260 are arranged on one side of the top of the bottom plate 100, a water collecting bucket 110 is arranged between the two third supports 260 and on the top of the bottom plate 100, so that waste water generated by a shower pipe base material 500 can be conveniently collected and recycled, a cooling box 200 is arranged on the tops of the two third supports 260 in a matched mode, a conveying mechanism 400 is arranged inside the cooling box 200, a shower mechanism 210 is arranged on one side of the top of the cooling box 200, a drying mechanism 220 is arranged on the other side of the top of the cooling box 200, an air cooling mechanism 230 is arranged on the other side of the top of the bottom plate 100, a collecting box 240 is arranged on the front side of the air cooling mechanism 230, an air conditioner 300 is connected to the rear side of the air cooling mechanism 230;
a feed inlet 201 is formed in one end of the cooling box 200, a discharge outlet 202 is formed in the other end of the cooling box 200, a partition plate 203 is arranged in the middle of the inside of the cooling box 200, the partition plate 203 partitions the inside of the cooling box 200 into a water spraying area and a drying area, so that the cooling and drying are not affected with each other, the same conveying mechanism 400 is used for improving the processing efficiency, an installation through frame 205 is arranged in the middle of the partition plate 203, a water outlet pipe 204 is arranged on one side of the bottom of the cooling box 200, which is close to the feed inlet 201, a first valve is fixedly installed on the water outlet pipe 204, the water outlet pipe 204 is positioned above the water collecting bucket 110, a base plate 401 is fixedly installed in the cooling box 200, a plurality of fourth supports 402 are arranged at equal intervals on the top of the base plate 401, the plurality of fourth supports 402, the middle part of the supporting panel 403 is provided with a V-shaped groove, so that the tube base material 500 can be conveniently pulled, the tube base material 500 is prevented from obliquely swinging in the pulling process, the bottom of the V-shaped groove is provided with a plurality of clearance grooves, the conveying wheel 409 can conveniently extend out of the pulling tube base material 500, the top of the backing plate 401 is provided with a plurality of supporting frames 408 at equal intervals, the supporting frames 408 are symmetrically distributed about the transverse center line of the cooling box 200, the top of the supporting frame 408 is rotatably provided with a first rotating shaft 407 and a plurality of second rotating shafts 411, the first rotating shaft 407 is positioned at one side of the feeding port 201, one end of the first rotating shaft 407 is fixedly provided with a belt pulley 410 and a second gear 406, the belt pulley 410 is positioned at the inner side of the second gear 406, the second gear 406 is engaged with a first gear 405, the first gear 405 is fixedly arranged on the output shaft, a plurality of the equal fixed mounting of second pivot 411 one end has belt pulley 410, a plurality of connect through belt transmission between the belt pulley 410, equal fixed mounting has two transfer pulleys 409 in first pivot 407 and a plurality of second pivot 411 middle part, transfer pulley 409 position and avoidance slot position one-to-one.
The water spraying mechanism 210 comprises a water tank 211, a second valve is arranged inside the water tank 211, the water tank 211 is installed on one side, close to the feed inlet 201, of the top of the cooling box 200, the bottom of the water tank 211 is connected with a first water conveying pipe 212, the other end of the first water conveying pipe 212 penetrates through the top of the cooling box 200 and is connected with a second water conveying pipe 213, the second water conveying pipe 213 is located inside the cooling box 200, a plurality of third water conveying pipes 214 are arranged at the bottom of the second water conveying pipe 213 in an equidistant mode, the other end of the third water conveying pipe 214 is connected with a water conveying plate 215, a plurality of water spraying heads 216 are installed at the bottom of the water conveying plate 215 and are distributed in a matrix mode, full water spraying cooling can be conveniently carried out on the pipe base material 500.
The air cooling mechanism 230 includes an air cooling box 231, the air cooling box 231 is mounted on the bottom plate 100 through two first brackets 232, a discharge door 239 is disposed on one side of the air cooling box 231, the discharge door 239 is provided with a sliding door 233, a collecting box 240 is disposed at the top of one side of the bottom plate 100 close to the sliding door 233, an air cooler 300 is disposed at the top of one side of the bottom plate 100 far from the sliding door 233, the air cooler 300 includes an air cooler main body 301, a cold air pipe 302 and a hot air pipe 303 are disposed at the top of the air cooler main body 301, the cold air pipe 302 penetrates through the air cooling box 231 and extends into the air cooler main body to further cool, so as to ensure that the pipe base material 500 is sufficiently cooled and well-shaped, a second bracket 234 is disposed at one side of the bottom end inside the air cooling box 231, a connecting table 236 is disposed at the bottom of one side of the support plate 238, the connecting table 236 is rotatably mounted at, the inside bottom opposite side fixed mounting of air cooling box 231 has cylinder 237, the piston rod top of cylinder 237 sets up in the spout, and the cylinder 237 of being convenient for supports carrier plate 238, makes it slope, emptys pipe base material 500 to collecting box 240 in, and convenient the collection improves collection efficiency.
The preparation method of the PE gas pipe with high chronic crack resistance comprises the following steps:
s1, mixing materials: weighing 120 parts of modified PE resin powder, 16 parts of lubricating filler, 2 parts of ammonium polyphosphate, 2.2 parts of antioxidant and 1.0 part of ultraviolet stabilizer according to parts by weight, putting into a mixer, and uniformly stirring at 200r/min to obtain a mixture;
s2, extrusion: sending the mixture into a pipe extruder to be extruded to obtain a pipe base material 500, wherein the temperature of a charging barrel of the extruder is 180 ℃, and the temperature of a die is 210 ℃;
s3, cooling and shaping: feeding the pipe base material 500 from the feeding port 201 of the cooling and shaping equipment, starting the first motor 404 to drive the transmission wheel 409 to rotate, pulling the pipe base material 500 through the transmission mechanism 400, stopping the first motor 404 when the whole pipe base material 500 enters a water spraying area, opening the valve II in the water tank 211, allowing cold water to pass through the first water pipe 212, the second water pipe 213, the third water pipe 214 and the water conveying plate 215 and to be sprayed out from the water spray head 216, cooling the pipe base material 500 below for the first time, starting the first motor 404 again after the first cooling, pulling the pipe base material 500 to pass through the installation through frame 205, stopping the first motor 404 after the pipe base material 500 is completely pulled to a drying area, starting the hot air blower 224, drying the pipe base material 500, simultaneously opening the valve I on the water outlet pipe 204, discharging wastewater in the water spraying area into the water collecting barrel 110, and drying, the first motor 404 is started again to convey the tube base material 500 from the discharge port 202 to the air cooling mechanism 230, the air conditioner 300 is started to input cold air into the air cooling tank 231 for secondary cooling, after the secondary cooling, the sliding door 233 is opened, the air cylinder 237 is started, the bearing plate 238 is pushed to incline the bearing plate 238, after the second cooling, the air cylinder 237 is stopped, and the tube base material 500 slides into the collection box 240 for collection.
The working principle of the invention is as follows:
feeding the tube base material 500 from the feeding port 201 of the cooling and shaping equipment, starting a first motor 404, driving a second gear 406 to rotate through a first gear 405, driving a first rotating shaft 407 to rotate through the second gear 406, driving a belt pulley 410 to rotate through the first rotating shaft 407, driving a second rotating shaft 411 to rotate through belt transmission of the belt pulley 410, driving a transmission wheel 409 to rotate through the first rotating shaft 407 and the second rotating shaft 411, and drawing the tube base material 500; the pipe base material 500 is more stable in the traction and transmission process, the transmission efficiency is improved, and the whole processing speed is accelerated by the traction of the plurality of transmission wheels 409 and the arrangement of the V-shaped grooves in the middle of the supporting panel 403.
After being pulled by the conveying mechanism 400, when the whole pipe base material 500 enters the water spraying area, the first motor 404 is stopped, the second valve inside the water tank 211 is opened, and cold water is sprayed out from the water spray head 216 through the first water conveying pipe 212, the second water conveying pipe 213, the third water conveying pipe 214 and the water conveying plate 215 to cool the pipe base material 500 below for the first time; the pipe base material 500 is sprayed with cold water in multiple directions through the plurality of water spray heads 216, so that the cooling efficiency is accelerated.
After the first cooling, the first motor 404 is started again, the pipe substrate 500 is pulled to pass through the installation through frame 205, when the pipe substrate 500 is completely pulled to the drying area, the first motor 404 is stopped, the hot air blower 224 is started, the pipe substrate 500 is dried, meanwhile, the first valve on the water outlet pipe 204 is opened, and the wastewater in the water spraying area is discharged into the water collecting barrel 110; the pipe substrate 500 is fully dried by the arranged hot air heater 224, the whole drying speed is accelerated by the hot air and the concave first baffle 225, and the processing efficiency is improved.
After drying, the first motor 404 is started again, the tube base material 500 is conveyed into the air cooling mechanism 230 from the discharge port 202, the air conditioner 300 is started, cold air is input into the air cooling tank 231 for secondary cooling, after the secondary cooling, the sliding door 233 is opened, the air cylinder 237 is started, the bearing plate 238 is pushed to incline, after the second cooling, the air cylinder 237 is stopped, and the tube base material 500 slides into the collection box 240 for collection; by arranging the air cooling mechanism 230, the tube base material 500 is further cooled, so that insufficient cooling and incomplete shaping are avoided, and meanwhile, the potential safety hazard of manual operation is also avoided; the cylinder 237 is added to push the bearing plate 238, so that the product collecting efficiency is further improved, the labor is saved, and the whole processing efficiency is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (10)
1. The PE gas pipe with high chronic crack resistance is characterized by comprising the following raw materials in parts by weight: 130 parts of modified PE resin powder 110-20 parts of lubricating filler, 1.5-3 parts of ammonium polyphosphate, 1.2-2.6 parts of antioxidant and 0.5-1.3 parts of ultraviolet stabilizer;
the preparation method of the PE gas pipe with high chronic crack resistance comprises the following steps:
step one, mixing materials: weighing 130 parts of modified PE resin powder 110-one, 12-20 parts of lubricating filler, 1.5-3 parts of ammonium polyphosphate, 1.2-2.6 parts of antioxidant and 0.5-1.3 parts of ultraviolet stabilizer according to parts by weight, putting into a mixer, and uniformly stirring at 200r/min for 100-one to obtain a mixture;
step two, extrusion: the mixture is sent into a pipe extruder to be extruded to obtain a pipe base material (500), wherein the temperature of a charging barrel of the extruder is 190 ℃ plus 180 ℃, and the temperature of a die is 220 ℃ plus 210 ℃;
step three, cooling and shaping: feeding the tube base material (500) from a feeding hole (201) of the cooling and shaping equipment, starting a first motor (404), driving a transmission wheel (409) to rotate, pulling the tube base material (500) through a transmission mechanism (400), stopping the first motor (404) when the whole tube base material (500) enters a water spraying area, opening a second valve inside a water tank (211), allowing cold water to pass through a first water pipe (212), a second water pipe (213), a third water pipe (214) and a water conveying plate (215), spraying from a water spraying head (216), cooling the tube base material (500) below for the first time, starting the first motor (404) again after the first cooling, pulling the tube base material (500), penetrating through an installation through frame (205), stopping the first motor (404) after the tube base material (500) is completely pulled to a drying area, starting a hot air blower (224), and drying the tube base material (500), simultaneously, a first valve on a water outlet pipe (204) is opened, wastewater in a water spraying area is discharged into a water collecting barrel (110), after drying, a first motor (404) is started again, a pipe substrate (500) is conveyed into an air cooling mechanism (230) from a discharge hole (202), an air cooler (300) is started, cold air is input into an air cooling box (231), secondary cooling is carried out, after secondary cooling, a sliding door (233) is opened, an air cylinder (237) is started, a bearing plate (238) is jacked, the bearing plate (238) is inclined, after inclination, the air cylinder (237) is stopped, the pipe substrate (500) is made to slide into a collecting box (240) and is collected.
2. The PE gas pipe with high chronic crack resistance as claimed in claim 1, wherein the preparation method of the modified PE resin powder comprises the following steps:
a1: weighing 55-70 parts of MDPE resin powder, 8-16 parts of talcum powder, 2-5 parts of vinyl distearamide and 6-10 parts of maleic acid grafted polyethylene according to parts by weight, and stirring and mixing at the rotating speed of 400-600r/min for 20-30min to obtain a mixture;
a2: feeding the mixture into a double-screw extruder, and extruding and granulating after melting and mixing; wherein the rotation speed of the screw is 300-400r/min, and the melting temperature is 180-195 ℃.
3. The PE gas pipe with high chronic crack resistance as claimed in claim 1, wherein the lubricating filler is prepared by a method comprising the following steps:
b1: weighing 15-22 parts of white carbon black, 8-13 parts of organic bentonite, 4-7 parts of molybdenum disulfide, 1-3 parts of trimethoxy silane and 0.2-0.6 part of alumina according to parts by weight;
b2: under the protection of nitrogen, sequentially adding white carbon black, molybdenum disulfide and trimethoxy silane into a reaction kettle, stirring for 20-30min, adding organic bentonite and alumina, and continuously stirring for 10-20min to obtain a mixed wet material;
b3: adding the mixed wet material into a vacuum drier, drying for 40-60min at 40-60 ℃, and grinding and crushing to obtain the lubricating filler with 20-30 meshes.
4. The PE gas pipe with high chronic crack resistance as claimed in claim 1, wherein the antioxidant is one or more of tris (2, 4-di-tert-butylphenyl) phosphite, pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
5. The PE gas pipe with high chronic crack resistance as claimed in claim 1, wherein the ultraviolet stabilizer is one or more of 2-hydroxy-4-n-octyloxybenzophenone, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazin-2-yl) -5-octyloxyphenol.
6. The PE gas pipe with high chronic crack resistance as claimed in claim 1, wherein the cooling and sizing device in the third step comprises a bottom plate (100), two third brackets (260) are arranged on one side of the top of the bottom plate (100), a water collecting bucket (110) is arranged between the two third brackets (260) and on the top of the bottom plate (100), the tops of the two third brackets (260) are provided with a cooling tank (200) in a matching way, a conveying mechanism (400) is arranged in the cooling box (200), a water spraying mechanism (210) is arranged on one side of the top of the cooling box (200), the other side of the top of the cooling box (200) is provided with a drying mechanism (220), the other side of the top of the bottom plate (100) is provided with an air cooling mechanism (230), a collecting box (240) is arranged on the front side of the air cooling mechanism (230), and a cold air machine (300) is connected to the rear side of the air cooling mechanism (230);
one end of the cooling box (200) is provided with a feed inlet (201), the other end of the cooling box (200) is provided with a discharge port (202), a partition plate (203) is arranged in the middle of the inside of the cooling box (200), the partition plate (203) partitions the inside of the cooling box (200) into a water spraying area and a drying area, an installation through frame (205) is arranged in the middle of the partition plate (203), a water outlet pipe (204) is arranged on one side of the bottom of the cooling box (200) close to the feed inlet (201), a first valve is fixedly arranged on the water outlet pipe (204), the water outlet pipe (204) is positioned above the water collecting barrel (110), a base plate (401) is fixedly arranged inside the cooling box (200), a plurality of fourth supports (402) are equidistantly arranged at the top of the base plate (401), the fourth supports (402) are symmetrically distributed about the transverse center line of the cooling box (200), and a support panel (403) is fixedly, the middle part of the supporting panel (403) is provided with a V-shaped groove, the bottom of the V-shaped groove is provided with a plurality of clearance grooves, the top of the backing plate (401) is provided with a plurality of supporting frames (408) at equal intervals, the supporting frames (408) are symmetrically distributed about the transverse central line of the cooling box (200), the top of each supporting frame (408) is rotatably provided with a first rotating shaft (407) and a plurality of second rotating shafts (411), the first rotating shaft (407) is positioned on one side of the feeding port (201), one end of the first rotating shaft (407) is fixedly provided with a belt pulley (410) and a second gear (406), the belt pulley (410) is positioned on the inner side of the second gear (406), the second gear (406) is engaged with a first gear (405), the first gear (405) is fixedly arranged on the output shaft of the first motor (404), and the first motor (404) is fixedly arranged on the backing plate (401), a plurality of the equal fixed mounting of second pivot (411) one end has belt pulley (410), a plurality of connect through belt transmission between belt pulley (410), equal fixed mounting has two transfer pulleys (409) in first pivot (407) and a plurality of second pivot (411) middle part, transfer pulley (409) position and keep away the dead slot position one-to-one.
7. The PE gas pipe with high chronic crack resistance as claimed in claim 6, the water spraying mechanism (210) comprises a water tank (211), a valve II is arranged in the water tank (211), the water tank (211) is arranged on one side of the top of the cooling tank (200) close to the feed inlet (201), the bottom of the water tank (211) is connected with a first water delivery pipe (212), the other end of the first water delivery pipe (212) penetrates through the top of the cooling tank (200) and is connected with a second water delivery pipe (213), the second water conveying pipe (213) is positioned inside the cooling box (200), a plurality of third water conveying pipes (214) are arranged at the bottom of the second water conveying pipe (213) at equal intervals, the other ends of the plurality of third water conveying pipes (214) are connected with water conveying plates (215), the bottom of the water conveying plate (215) is provided with a plurality of water spraying heads (216), and the water spraying heads (216) are distributed in a matrix manner.
8. The PE gas pipe with high chronic crack resistance as claimed in claim 6, wherein the drying mechanism (220) comprises a fixed box (221), two fixed plates (223) are fixedly connected to the bottom end inside the fixed box (221), an air heater (224) is installed on each of the two fixed plates (223), an air outlet of the air heater (224) penetrates through the bottom of the fixed box (221) and is connected with a first baffle (225), the first baffle (225) is located inside the cooling box (200), the first baffle (225) is of an inward concave structure, and a cover plate (222) is connected to the top of the fixed box (221) through a hinge.
9. The PE gas pipe with high chronic crack resistance according to claim 6, wherein the air cooling mechanism (230) comprises an air cooling box (231), the air cooling box (231) is mounted on the base plate (100) through two first brackets (232), a discharge door (239) is formed in one side of the air cooling box (231), the discharge door (239) is provided with a sliding door (233), a collection box (240) is arranged at the top of one side, close to the sliding door (233), of the base plate (100), an air cooler (300) is arranged at the top of one side, far away from the sliding door (233), of the base plate (100), the air cooler (300) comprises an air cooler main body (301), a cold air pipe (302) and a hot air pipe (303) are arranged at the top of the air cooler main body (301), the cold air pipe (302) penetrates through the air cooling box (231) and extends to the inside, a second bracket (234) is arranged at one side of the bottom inside the air cooling box (231), the bottom of one side of the bearing plate (238) is provided with a connecting table (236), the connecting table (236) is rotatably mounted at the top of the second support (234) through a fixing pin (235), the bottom of the other side of the bearing plate (238) is provided with a sliding groove, the other side of the bottom end inside the air cooling box (231) is fixedly provided with an air cylinder (237), and the top end of a piston rod of the air cylinder (237) is arranged in the sliding groove.
10. The preparation method of the PE gas pipe with high chronic crack resistance is characterized by comprising the following steps:
s1, mixing materials: weighing 130 parts of modified PE resin powder 110-one, 12-20 parts of lubricating filler, 1.5-3 parts of ammonium polyphosphate, 1.2-2.6 parts of antioxidant and 0.5-1.3 parts of ultraviolet stabilizer according to parts by weight, putting into a mixer, and uniformly stirring at 200r/min for 100-one to obtain a mixture;
s2, extrusion: the mixture is sent into a pipe extruder to be extruded to obtain a pipe base material (500), wherein the temperature of a charging barrel of the extruder is 190 ℃ plus 180 ℃, and the temperature of a die is 220 ℃ plus 210 ℃;
s3, cooling and shaping: feeding the tube base material (500) from a feeding hole (201) of the cooling and shaping equipment, starting a first motor (404), driving a transmission wheel (409) to rotate, pulling the tube base material (500) through a transmission mechanism (400), stopping the first motor (404) when the whole tube base material (500) enters a water spraying area, opening a second valve inside a water tank (211), allowing cold water to pass through a first water pipe (212), a second water pipe (213), a third water pipe (214) and a water conveying plate (215), spraying from a water spraying head (216), cooling the tube base material (500) below for the first time, starting the first motor (404) again after the first cooling, pulling the tube base material (500), penetrating through an installation through frame (205), stopping the first motor (404) after the tube base material (500) is completely pulled to a drying area, starting a hot air blower (224), and drying the tube base material (500), simultaneously, a first valve on a water outlet pipe (204) is opened, wastewater in a water spraying area is discharged into a water collecting barrel (110), after drying, a first motor (404) is started again, a pipe substrate (500) is conveyed into an air cooling mechanism (230) from a discharge hole (202), an air cooler (300) is started, cold air is input into an air cooling box (231), secondary cooling is carried out, after secondary cooling, a sliding door (233) is opened, an air cylinder (237) is started, a bearing plate (238) is jacked, the bearing plate (238) is inclined, after inclination, the air cylinder (237) is stopped, the pipe substrate (500) is made to slide into a collecting box (240) and is collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011185581.2A CN112266521A (en) | 2020-10-29 | 2020-10-29 | PE gas pipe with high chronic crack resistance and preparation method thereof |
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| CN202011185581.2A CN112266521A (en) | 2020-10-29 | 2020-10-29 | PE gas pipe with high chronic crack resistance and preparation method thereof |
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| CN112266521A true CN112266521A (en) | 2021-01-26 |
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Cited By (1)
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|---|---|---|---|---|
| CN113334726A (en) * | 2021-07-02 | 2021-09-03 | 刘亮亮 | Novel preparation of polyethylene PE tubular product device |
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Application publication date: 20210126 |