CN101733855B - Method for producing high-voltage crosslinkable polyethylene cable material - Google Patents
Method for producing high-voltage crosslinkable polyethylene cable material Download PDFInfo
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- CN101733855B CN101733855B CN2009100734536A CN200910073453A CN101733855B CN 101733855 B CN101733855 B CN 101733855B CN 2009100734536 A CN2009100734536 A CN 2009100734536A CN 200910073453 A CN200910073453 A CN 200910073453A CN 101733855 B CN101733855 B CN 101733855B
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Abstract
The invention relates to a method for producing a high-voltage crosslinkable polyethylene cable material, which solves the problems of low purity of the cable material and low long-term stability of the production quality of the cable material. The method comprises the following steps of: absorbing polyethylene granules into a stainless-steel material-storage tank by an absorbing machine; supplying the granules for a weight-loss type granule electronic scale discontinuously; mixing the polyethylene granules and an antioxidant; absorbing the mixed materials into a melt pump and then injecting the materials into a continuously-sieving melt filter to filter impurities; mixing the filtered melt and a cross-linking agent DCP; extruding the cross-linking agent DCP-containing polyethylene and pelletizing and dehydrating; shunting part of the crosslinkable polyethylene granules to an impurity detector; after passing the detection, delivering the rest part of the crosslinkable polyethylene granules to a dryer for drying to obtain the high-voltage crosslinkable polyethylene cable material. The method ensures the purity of the high-voltage crosslinkable polyethylene cable material and the long-term stability of the production quality of the high-voltage crosslinkable polyethylene cable material.
Description
The method field
The present invention relates to a kind of production method of crosslinkable polyethylene cable material, be specifically related to a kind of production method of high-voltage crosslinkable polyethylene cable material, belong to the production technology field of CABLE MATERIALS.
Background method
High voltage power transmission has long distance, big capacity, low-loss advantage, is representing the highest level and the development trend of current technology of transmission of electricity, receives the concern of countries in the world day by day.The high voltage power transmission technology has experienced from high pressure, super-pressure to extra-high voltage development course and trend in the world.Electric wire is the critical component of electric power transportation, and insulating materials wherein is one of key factor of decision cable voltage ability.Crosslinked polyethylene (XLPE) becomes the main insulating materials of high-tension cable in recent years because of having excellent dielectric properties and good heat resistant type, processing characteristics.At present, the 110-220kV cable generally uses the XLPE insulation in the world, and part 500kV level XLPE insulated cable circuit also brings into operation.
Tenth Five-Year Plan Period; China 35kV and following crosslinkable polyethylene cable material are realized production domesticization fully; The level of the enterprising country of the product quality and the world hardly differs; But the crosslinkable polyethylene cable material of crosslinkable polyethylene Insulation Material, particularly 110kV, 220kV and above grade that 35kV is above all can't be produced so far.At present, the low production that has restricted domestic high-voltage crosslinkable polyethylene cable material of the low long-time stability of the degree of purity of CABLE MATERIALS with the CABLE MATERIALS quality, and become the bottleneck problem that restricts the domestic production high-voltage crosslinkable polyethylene cable material.
Summary of the invention
The objective of the invention is the low problem of long-time stability low for the degree of purity that solves CABLE MATERIALS and the CABLE MATERIALS quality of production, and then a kind of production method of high-voltage crosslinkable polyethylene cable material is provided.
The step of the production method of a kind of high-voltage crosslinkable polyethylene cable material of the present invention is:
Step 1: polyethylene pellet is sucked the stainless steel storage tank by suction feeder; The stainless steel storage tank links to each other with weight-loss type pellet electronic scale through pipeline; Weight-loss type pellet electronic scale is interrupted feed, and the feeding speed of weight-loss type pellet electronic scale is per hour 10 kilograms to per hour 1000 kilograms;
Step 2: weight-loss type pellet electronic scale is imported polyethylene pellet continuously to first charging aperture of mixing roll; Weight-loss type powder electronic scale is imported antioxidant continuously to two charging apertures of mixing roll simultaneously, and the feeding speed of weight-loss type powder electronic scale antioxidant is per hour 0.5 kilogram to per hour 50 kilograms; Mixing roll is twin-screw mixer machine or first single screw rod reciprocating kneading machine;
Step 3: polyethylene pellet and antioxidant are evenly mixing in mixing roll; Melting temperature is 130-250 ℃; Material after mixing is discharged from mixing roll; Melt Pump sucks the material after mixing in the Melt Pump, then melt is injected in the continuous moving-net type fondant filter impurity in the melt filtration; Continuously the moving-net type fondant filter adopts Harbin to breathe out the LZGL produced in series ultra-clean high-voltage crosslinkable polyethylene cable material filter of general electrical technology Co., Ltd;
Step 4: the melt after the filtration gets in second single screw rod reciprocating kneading machine; Weight-loss type liquid is claimed the crosslink agent DCP after thawing and the filtration is injected in second single screw rod reciprocating kneading machine simultaneously; The feeding speed that weight-loss type liquid is claimed is per hour 0.5 kilogram to per hour 100 kilograms; Melt after the filtration and crosslink agent DCP are evenly mixing; Melting temperature is 110-120 ℃, obtains containing the polyethylene of crosslink agent DCP; It is the stainless steel tank body that has the electrical heating cover that crosslink agent DCP melts filter, claims to link to each other with weight-loss type liquid by pipeline, and in the exit of melting filter double-deck 500 mesh filter screens is installed;
Step 5: the polyethylene that will contain crosslink agent DCP is extruded from single screw rod reciprocating kneading machine; Get into single screw extrusion machine then; At the extruding end of single screw extrusion machine the eccentric pelleter of water smoke is installed; The eccentric pelleter of water smoke is with the polyethylene extrusion granulation of single screw extrusion machine, and the diameter of the polyethylene particle after the granulation is 3-4mm, and thickness is 3-4mm;
Step 6: polyethylene particle is delivered to the linear vibrating screen dehydration, obtain the crosslinkable polyethylene particle;
Step 7: the crosslinkable polyethylene particulate fraction is branched to the impurity detector; The impurity content of online detection crosslinkable polyethylene particle; Detect then crosslinkable polyethylene particle remainder is sent in the crosslinkable polyethylene cable material drying machine after qualified dry; Baking temperature is 40-70 ℃, obtains high-voltage crosslinkable polyethylene cable material.
The present invention compares with existing method has following beneficial effect: the production method of high-voltage crosslinkable polyethylene cable material of the present invention; Reach through the degree of purity that in production line, is equipped with the high-voltage crosslinkable polyethylene cable material that continuous moving-net type fondant filter guaranteed to be produced that 70-100 μ m impurity content is less than 10 in every kilogram of CABLE MATERIALS; And, the long-time stability of the high-voltage crosslinkable polyethylene cable material quality of production have been guaranteed through in production line, being equipped with continuous moving-net type fondant filter and impurity detector.
The specific embodiment
The specific embodiment one: the step of the production method of a kind of high-voltage crosslinkable polyethylene cable material of this embodiment is:
Step 1: polyethylene pellet is sucked the stainless steel storage tank by suction feeder; The stainless steel storage tank links to each other with weight-loss type pellet electronic scale through pipeline; Weight-loss type pellet electronic scale is interrupted feed, and the feeding speed of weight-loss type pellet electronic scale is per hour 10 kilograms to per hour 1000 kilograms;
Step 2: weight-loss type pellet electronic scale is imported polyethylene pellet continuously to first charging aperture of mixing roll; Weight-loss type powder electronic scale is imported antioxidant continuously to two charging apertures of mixing roll simultaneously, and the feeding speed of weight-loss type powder electronic scale antioxidant is per hour 0.5 kilogram to per hour 50 kilograms; Mixing roll is twin-screw mixer machine or first single screw rod reciprocating kneading machine;
Step 3: polyethylene pellet and antioxidant are evenly mixing in mixing roll; Melting temperature is 130-250 ℃; Material after mixing is discharged from mixing roll; Melt Pump sucks the material after mixing in the Melt Pump, then melt is injected in the continuous moving-net type fondant filter impurity in the melt filtration;
Step 4: the melt after the filtration gets in second single screw rod reciprocating kneading machine; Weight-loss type liquid is claimed the crosslink agent DCP after thawing and the filtration is injected in second single screw rod reciprocating kneading machine simultaneously; The feeding speed that weight-loss type liquid is claimed is per hour 0.5 kilogram to per hour 100 kilograms; Melt after the filtration and crosslink agent DCP are evenly mixing; Melting temperature is 110-120 ℃, obtains containing the polyethylene of crosslink agent DCP;
Step 5: the polyethylene that will contain crosslink agent DCP is extruded from single screw rod reciprocating kneading machine; Get into single screw extrusion machine then; At the extruding end of single screw extrusion machine the eccentric pelleter of water smoke is installed; The eccentric pelleter of water smoke is with the polyethylene extrusion granulation of single screw extrusion machine, and the diameter of the polyethylene particle after the granulation is 3-4mm, and thickness is 3-4mm;
Step 6: polyethylene particle is delivered to the linear vibrating screen dehydration, obtain the crosslinkable polyethylene particle;
Step 7: the crosslinkable polyethylene particulate fraction is branched to the impurity detector; The impurity content of online detection crosslinkable polyethylene particle; Detect then crosslinkable polyethylene particle remainder is sent in the crosslinkable polyethylene cable material drying machine after qualified dry; Baking temperature is 40-70 ℃, obtains high-voltage crosslinkable polyethylene cable material.
Suction feeder and stainless steel storage tank have been formed the polyethylene feeding-system in this embodiment; The stainless steel storage tank links to each other with weight-loss type pellet electronic scale through pipeline; The electronics valve has been installed in stainless steel storage tank bottom; When the polyethylene pellet in the weight-loss type pellet electronic scale was less than the lower limit of setting, the electronics valve open was to weight-loss type pellet electronic scale feed; When the polyethylene pellet in the weight-loss type pellet electronic scale reaches the higher limit of setting, the electronics valve closing;
Weight-loss type pellet electronic scale adopts the SDC series weight-loss type electronic scale of Harbin University of Science and Technology's electric insulation Research on Diagnosis manufacturing, and this weight-loss type pellet electronic scale adopts the defeated material of spring spiro rod;
Weight-loss type powder electronic scale adopts the SDC series weight-loss type electronic scale of Harbin University of Science and Technology's electric insulation Research on Diagnosis manufacturing, and this weight-loss type powder electronic scale adopts the defeated material of twin-screw;
Weight-loss type liquid claims to adopt the SDC series weight-loss type electronic scale of Harbin University of Science and Technology's electric insulation Research on Diagnosis manufacturing, and this weight-loss type liquid claims to adopt the defeated material of liquid pump;
It is to have electrical heating stainless steel tank body cover, that heat-insulating property is good that crosslink agent DCP melts filter, claims to link to each other with weight-loss type liquid through pipeline, and in the exit of melting filter double-deck 500 mesh filter screens is installed;
Twin-screw mixer machine employing section is the STS or the ZSK series double screw extruder of grand group (COPERION) doubly, or the SHJ of Nanjing Chengmeng Plastic Mechanical Industry Co. Ltd. series double screw extruder; Single screw rod reciprocating kneading machine adopts the MKS reciprocating type single screw mixing machine of series of Switzerland Buss company or the reciprocating type single screw mixing machine of CM series of Nanjing Chengmeng Plastic Mechanical Industry Co. Ltd.;
Single screw extrusion machine adopts the DJ series single screw extrusion machine of Nanjing Chengmeng Plastic Mechanical Industry Co. Ltd.;
Melt Pump adopts the ZB-B series Melt Pump of Zhengzhou Bart's Melt Pump Co., Ltd;
Continuously the moving-net type fondant filter adopts Harbin to breathe out the LZGL produced in series ultra-clean high-voltage crosslinkable polyethylene cable material filter of general electrical technology Co., Ltd; This filter is continuous moving-net type, can effectively avoid because of changing the impurity that screen pack is introduced; Simultaneously, designed special runner in this filter, can in time wash, discharge the metal fillings that forms because of screen pack and head friction, guaranteed that melt filtration has higher cleanliness factor;
Linear vibrating screen is the DZSF series linear vibrating screen of Yongqing, Xinxiang City sieving machine Co., Ltd;
The crosslinkable polyethylene cable material drying machine adopts the SZG double conic rotary vacuum dryer of Changzhou dry Engineering Co., Ltd of news thunder; This drying machine is diconical rotary tank; Jar is interior under vacuum state; Feeding steam or hot water heat in chuck; Heat contacts with wet stock by inner tank wall; The steam of wet stock heat absorption back evaporation; Taken away through Vacuum exhaust tube by vavuum pump; Owing to be in vacuum state in the tank body; And the revolution of tank body is stirred material inside and outside constantly up and down; So accelerated the rate of drying of material, improve drying efficiency, reach the purpose of even drying;
The impurity detector is the CD-III type polyolefin impurity particle measuring instrument of the general electrical technology in Kazakhstan Co., Ltd.
The specific embodiment two: what this embodiment and the specific embodiment one were different is: the volume of stainless steel storage tank is 1-2m in the step 1
3
The specific embodiment three: what this embodiment and the specific embodiment one to two were different is: the feeding speed of weight-loss type pellet electronic scale is per hour 100 kilograms to per hour 500 kilograms in the step 1.
The specific embodiment four: what this embodiment and the specific embodiment one to three were different is: the feeding speed of weight-loss type powder electronic scale antioxidant is per hour 0.5 kilogram to per hour 20 kilograms in the step 2.
The specific embodiment five: what this embodiment and the specific embodiment one to four were different is: the melting temperature in the step 3 is 180-220 ℃.
The specific embodiment six: what this embodiment and the specific embodiment one to five were different is: the feeding speed that weight-loss type liquid is claimed in the step 4 is per hour 1 kilogram to per hour 50 kilograms.
The specific embodiment seven: what this embodiment and the specific embodiment one to six were different is: the melting temperature in the step 4 is 112-118 ℃.
The specific embodiment eight: what this embodiment and the specific embodiment one to seven were different is: the diameter of the polyethylene particle in the step 5 after the granulation is 3.5mm, and thickness is 3.5mm.
The specific embodiment nine: what this embodiment and the specific embodiment one to seven were different is: baking temperature is 50-60 ℃ in the step 7.
Embodiment: the step of the production method of a kind of high-voltage crosslinkable polyethylene cable material of present embodiment is:
Step 1: polyethylene pellet is sucked the stainless steel storage tank by suction feeder; The stainless steel storage tank links to each other with weight-loss type pellet electronic scale through pipeline; Weight-loss type pellet electronic scale is interrupted feed, and the feeding speed of weight-loss type pellet electronic scale is per hour 500 kilograms;
Step 2: weight-loss type pellet electronic scale is imported polyethylene pellet by output to first charging aperture of twin-screw mixer machine or first single screw rod reciprocating kneading machine continuously; Weight-loss type powder electronic scale is imported antioxidant continuously to second charging aperture of twin-screw mixer machine or first single screw rod reciprocating kneading machine simultaneously, and the feeding speed of weight-loss type powder electronic scale is per hour 2 kilograms;
Step 3: polyethylene pellet and antioxidant are evenly mixing in twin-screw mixer machine or first single screw rod reciprocating kneading machine; Melting temperature is 200 ℃; Material after mixing is discharged from twin-screw mixer machine or first single screw rod reciprocating kneading machine; Melt Pump sucks the material after mixing in the Melt Pump; Then melt is injected in the continuous moving-net type fondant filter impurity in the melt filtration;
Step 4: the melt after the filtration gets in second single screw rod reciprocating kneading machine; Weight-loss type liquid is claimed the crosslink agent DCP after thawing and the filtration is injected in second single screw rod reciprocating kneading machine simultaneously; The feeding speed that weight-loss type liquid is claimed is per hour 10 kilograms; Melt after the filtration and crosslink agent DCP are evenly mixing; Melting temperature is 115 ℃, obtains containing the polyethylene of crosslink agent DCP;
Step 5: the polyethylene that will contain crosslink agent DCP is extruded from single screw rod reciprocating kneading machine; Get into single screw extrusion machine then; At the extruding end of single screw extrusion machine the eccentric pelleter of water smoke is installed; The eccentric pelleter of water smoke is with the polyethylene extrusion granulation of single screw extrusion machine, and the diameter of the polyethylene particle after the granulation is 3mm, and thickness is 3mm;
Step 6: polyethylene particle is delivered to the linear vibrating screen dehydration, obtain the crosslinkable polyethylene particle;
Step 7: the crosslinkable polyethylene particulate fraction is branched to the impurity detector; Send in the crosslinkable polyethylene cable material drying machine crosslinkable polyethylene particle remainder dry after the impurity content of online detection crosslinkable polyethylene particle is qualified; Baking temperature is 55 ℃, obtains high-voltage crosslinkable polyethylene cable material.
The production method of the high-voltage crosslinkable polyethylene cable material of present embodiment; Reach in every kilogram of CABLE MATERIALS 70-100 μ m impurity content for less than 8 through the degree of purity that in production line, is equipped with the high-voltage crosslinkable polyethylene cable material that continuous moving-net type fondant filter guaranteed to be produced; And, the long-time stability of the high-voltage crosslinkable polyethylene cable material quality of production have been guaranteed through in production line, being equipped with continuous moving-net type fondant filter and impurity detector.
Claims (9)
1. the production method of a high-voltage crosslinkable polyethylene cable material, it is characterized in that: the step of the production method of CABLE MATERIALS is:
Step 1: polyethylene pellet is sucked the stainless steel storage tank by suction feeder; The stainless steel storage tank links to each other with weight-loss type pellet electronic scale through pipeline; Weight-loss type pellet electronic scale is interrupted feed, and the feeding speed of weight-loss type pellet electronic scale is per hour 10 kilograms to per hour 1000 kilograms;
Step 2: weight-loss type pellet electronic scale is imported polyethylene pellet continuously to first charging aperture of mixing roll; Weight-loss type powder electronic scale is imported antioxidant continuously to two charging apertures of mixing roll simultaneously, and the feeding speed of weight-loss type powder electronic scale antioxidant is per hour 0.5 kilogram to per hour 50 kilograms; Mixing roll is twin-screw mixer machine or first single screw rod reciprocating kneading machine;
Step 3: polyethylene pellet and antioxidant are evenly mixing in mixing roll; Melting temperature is 130-250 ℃; Material after mixing is discharged from mixing roll; Melt Pump sucks the material after mixing in the Melt Pump, then melt is injected in the continuous moving-net type fondant filter impurity in the melt filtration; Continuously the moving-net type fondant filter adopts Harbin to breathe out the LZGL produced in series ultra-clean high-voltage crosslinkable polyethylene cable material filter of general electrical technology Co., Ltd;
Step 4: the melt after the filtration gets in second single screw rod reciprocating kneading machine; Weight-loss type liquid is claimed the crosslink agent DCP after thawing and the filtration is injected in second single screw rod reciprocating kneading machine simultaneously; The feeding speed that weight-loss type liquid is claimed is per hour 0.5 kilogram to per hour 100 kilograms; Melt after the filtration and crosslink agent DCP are evenly mixing; Melting temperature is 110-120 ℃, obtains containing the polyethylene of crosslink agent DCP; It is the stainless steel tank body that has the electrical heating cover that crosslink agent DCP melts filter, claims to link to each other with weight-loss type liquid by pipeline, and in the exit of melting filter double-deck 500 mesh filter screens is installed;
Step 5: the polyethylene that will contain crosslink agent DCP is extruded from single screw rod reciprocating kneading machine; Get into single screw extrusion machine then; At the extruding end of single screw extrusion machine the eccentric pelleter of water smoke is installed; The eccentric pelleter of water smoke is with the polyethylene extrusion granulation of single screw extrusion machine, and the diameter of the polyethylene particle after the granulation is 3-4mm, and thickness is 3-4mm;
Step 6: polyethylene particle is delivered to the linear vibrating screen dehydration, obtain the crosslinkable polyethylene particle;
Step 7: the crosslinkable polyethylene particulate fraction is branched to the impurity detector; The impurity content of online detection crosslinkable polyethylene particle; Detect then crosslinkable polyethylene particle remainder is sent in the crosslinkable polyethylene cable material drying machine after qualified dry; Baking temperature is 40-70 ℃, obtains high-voltage crosslinkable polyethylene cable material.
2. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the volume of stainless steel storage tank is 1-2m in the step 1
3
3. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the feeding speed of weight-loss type pellet electronic scale is per hour 100 kilograms to per hour 500 kilograms in the step 1.
4. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the feeding speed of weight-loss type powder electronic scale antioxidant is per hour 0.5 kilogram to per hour 20 kilograms in the step 2.
5. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the melting temperature in the step 3 is 180-220 ℃.
6. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the feeding speed that weight-loss type liquid is claimed in the step 4 is per hour 1 kilogram to per hour 50 kilograms.
7. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the melting temperature in the step 4 is 112-118 ℃.
8. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: the diameter of the polyethylene particle in the step 5 after the granulation is 3.5mm, and thickness is 3.5mm.
9. according to the production method of the said a kind of high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: baking temperature is 50-60 ℃ in the step 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100734536A CN101733855B (en) | 2009-12-18 | 2009-12-18 | Method for producing high-voltage crosslinkable polyethylene cable material |
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| CN2009100734536A CN101733855B (en) | 2009-12-18 | 2009-12-18 | Method for producing high-voltage crosslinkable polyethylene cable material |
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| CN101733855B true CN101733855B (en) | 2012-02-15 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102173003B (en) * | 2010-12-24 | 2013-12-18 | 佛山市金银河智能装备股份有限公司 | Automatic production line for thermal vulcanized silicon rubber |
| CN102336947B (en) * | 2011-07-19 | 2013-03-13 | 哈尔滨理工大学 | Preparation method of ultra-smooth semiconductive shielding material for high-voltage crosslinked polyethylene insulated cable |
| CN102276901B (en) * | 2011-07-19 | 2013-03-27 | 哈尔滨理工大学 | Method for preparing ultraclean crosslinkable polyethylene insulation material of high-voltage cable |
| CN102357935A (en) * | 2011-08-30 | 2012-02-22 | 佛山市金银河机械设备有限公司 | Automatic continuous production line of liquid silicon rubber |
| CN102360622B (en) * | 2011-09-06 | 2012-10-31 | 江苏佳成机械有限公司 | Extruder production line and production process for producing oil field special cables |
| CN102543316A (en) * | 2012-02-17 | 2012-07-04 | 杭州电缆股份有限公司 | Processing method for insulation process of 500kV cross-linked cable |
| CN103072214B (en) * | 2013-01-08 | 2015-06-10 | 江苏德威新材料股份有限公司 | Preparation method and device for 110kV-and-above insulating material capable of chemically crosslinking |
| CN106003462B (en) * | 2016-08-05 | 2019-03-26 | 浙江万马高分子材料有限公司 | For ultra-clean high voltage power cable insulating materials direct method production process and device |
| CN106346624A (en) * | 2016-09-26 | 2017-01-25 | 高团结 | Production method of high-voltage crosslinkable polyethylene cable material |
| EP3604398B1 (en) | 2018-08-04 | 2023-07-12 | Petkim Petrokimya Holding Anonim Sirketi | Method for producing high homogeneity crosslinkable polyethylene |
| CN110066366A (en) * | 2019-03-04 | 2019-07-30 | 哈尔滨理工大学 | A kind of graft type polyethylene insulation material and preparation method thereof |
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Application publication date: 20100616 Assignee: JIANGSU DONGFANG CABLE MATERIAL CO., LTD. Assignor: Harbin University of Science and Technology Contract record no.: 2013320000622 Denomination of invention: Method for producing high-voltage crosslinkable polyethylene cable material Granted publication date: 20120215 License type: Exclusive License Record date: 20130628 |
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