CN115325283A - Manufacturing process of W-shaped flexible cast iron drain pipe - Google Patents
Manufacturing process of W-shaped flexible cast iron drain pipe Download PDFInfo
- Publication number
- CN115325283A CN115325283A CN202210985716.6A CN202210985716A CN115325283A CN 115325283 A CN115325283 A CN 115325283A CN 202210985716 A CN202210985716 A CN 202210985716A CN 115325283 A CN115325283 A CN 115325283A
- Authority
- CN
- China
- Prior art keywords
- drain pipe
- powder
- cast iron
- parts
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 41
- 229910052742 iron Inorganic materials 0.000 claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 29
- 238000011049 filling Methods 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000010949 copper Substances 0.000 claims abstract description 25
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 23
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 23
- 239000011733 molybdenum Substances 0.000 claims abstract description 23
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 23
- 239000011574 phosphorus Substances 0.000 claims abstract description 23
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 23
- 239000010703 silicon Substances 0.000 claims abstract description 23
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 23
- 239000011593 sulfur Substances 0.000 claims abstract description 23
- 229910001339 C alloy Inorganic materials 0.000 claims abstract description 20
- 230000007797 corrosion Effects 0.000 claims abstract description 20
- 238000005260 corrosion Methods 0.000 claims abstract description 20
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 20
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 20
- 235000015110 jellies Nutrition 0.000 claims abstract description 19
- 239000008274 jelly Substances 0.000 claims abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000003365 glass fiber Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 14
- 241001062472 Stokellia anisodon Species 0.000 claims abstract description 8
- 238000009750 centrifugal casting Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 93
- 238000002156 mixing Methods 0.000 claims description 37
- 239000011248 coating agent Substances 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 27
- 239000010881 fly ash Substances 0.000 claims description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 16
- 239000003063 flame retardant Substances 0.000 claims description 16
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 230000003712 anti-aging effect Effects 0.000 claims description 9
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 9
- 239000006229 carbon black Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 235000019482 Palm oil Nutrition 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 235000012255 calcium oxide Nutrition 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000002540 palm oil Substances 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 5
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 5
- 235000010265 sodium sulphite Nutrition 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 2
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 2
- 230000006750 UV protection Effects 0.000 abstract description 3
- 239000011247 coating layer Substances 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000003064 anti-oxidating effect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- -1 ether imide Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
- F16L9/04—Reinforced pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention provides a manufacturing process of a W-shaped flexible cast iron drain pipe, which relates to the technical field of drain pipe manufacturing and comprises the following steps: s1: selecting raw materials, namely iron-carbon alloy with carbon content of 2.5% -4%, and preparing auxiliary materials: carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum; s2: heating the furnace temperature to smelt the iron-carbon alloy into molten iron, and then adding carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum into the molten iron to obtain mixed molten iron; s3: pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge for centrifugal casting to obtain a cast iron drain pipe, and annealing; the weather-resistant filling particles and the corrosion-resistant filling particles are mixed into the jelly and coated on the surface of the drain pipe, so that the surface of the drain pipe has various characteristics of flame retardance, static resistance, ultraviolet resistance, oxidation resistance and the like, and the tensile property of the coating layer is improved by matching with the toughness of the glass fiber, so that the flexible anti-seismic performance of the cast iron drain pipe is stronger.
Description
Technical Field
The invention relates to the technical field of drain pipe manufacturing, in particular to a manufacturing process of a W-shaped flexible cast iron drain pipe.
Background
At present, the development of cast iron drain pipes has been for hundreds of years, and due to the advantages of high strength, long service life, low noise, shock resistance, renewable recycling and the like which are unique to the cast iron drain pipes, the cast iron drain pipes are increasingly accepted by the international society and the market, the cast iron drain pipes are widely used in the construction drainage engineering in various fields such as sewage, rainwater and the like in the world, the market demand is sharply increased year by year, the supply is not in demand, and the W-shaped flexible cast iron drain pipe is one of cast iron drain pipes;
the existing W-shaped flexible cast iron drain pipe is mostly formed by pouring molten iron through a die, the advantages of high strength and the like are achieved by depending on the characteristics of cast iron materials, however, the drain pipe needs to be in contact with water for a long time, the surface layer is still easy to corrode, a common treatment mode is generally to spray an anticorrosive paint layer on the surface, the coating is only solidified liquid in nature, and the durability is low, so that the invention provides the manufacturing process of the W-shaped flexible cast iron drain pipe to solve the problems in the prior art.
Disclosure of Invention
Aiming at the problems, the invention provides a manufacturing process of a W-shaped flexible cast iron drain pipe, which improves the comprehensive performance of the surface of the cast iron drain pipe, has longer service life and is not easy to corrode.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a manufacturing process of a W-shaped flexible cast iron drain pipe comprises the following steps:
s1: selecting raw materials, namely iron-carbon alloy with carbon content of 2.5% -4%, and preparing auxiliary materials: carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum;
s2: heating the furnace temperature to smelt the iron-carbon alloy into molten iron, and then adding carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum into the molten iron to obtain mixed molten iron;
s3: pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge for centrifugal casting to obtain a cast iron drain pipe, and annealing;
s4: preparing a PET block, matching the PET block with flame-retardant powder to carry out melt blending and extrusion on static-resistant supplementary powder, and cooling to obtain weather-resistant filling particles;
s5; preparing PBT blocks, mixing the PBT blocks with antioxidant powder to form uvioresistant powder, melting, blending, extruding and cooling to form corrosion-resistant filling particles;
s6: preparing materials: chloroprene rubber, SG-4 type PVC resin, alumina powder, barium sulfate powder, an anti-aging agent RD, N220 carbon black, modified fly ash and glass fiber;
s7: putting the raw materials in the S7 into an internal mixer, mixing into a colloid, adding weather-resistant filler particles and corrosion-resistant filler particles to obtain a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, and cooling and shaping;
s8: and a flexible interface is arranged at the end head of the cast iron drain pipe.
The further improvement lies in that: in the S1, the raw materials and the auxiliary materials are mixed according to the following mass ratio: 75-90 parts of iron-carbon alloy, 3.6-3.8 parts of carbon, 2-3 parts of silicon, 0.3-0.5 part of manganese, 0.2-0.6 part of phosphorus, 0.3-0.4 part of sulfur, 1-1.5 parts of rare earth, 0.1-0.2 part of copper and 0.25-0.55 part of molybdenum.
The further improvement lies in that: and in the S2, the temperature of the furnace is increased to more than 1500 ℃ to smelt the iron-carbon alloy, then carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum are added into molten iron, the temperature of the furnace is increased to more than 1750 ℃, and smelting is continued to obtain mixed molten iron.
The further improvement lies in that: and S3, pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge, controlling the temperature of the molten iron to be above 1300 ℃, cooling after centrifugal casting to obtain a cast iron drain pipe, heating the cast iron drain pipe to 800-880 ℃ during annealing treatment, preserving heat for 1-2 hours, then air-cooling the cast iron drain pipe to room temperature, finishing annealing, coating a layer of palm oil on the surface after annealing, maintaining for 24 hours, and cleaning.
The further improvement lies in that: in S4, the flame retardant powder is as follows: the polyester powder is modified by a fire retardant and then mixed with the ether imide powder, and the static electricity resistant supplementary powder is a mixture of: the perovskite composite oxide powder, the absolute ethyl alcohol, the dispersing agent and the PP powder are dried to obtain the composite material.
The further improvement lies in that: in S5, the antioxidant powder is a powder mixture of sodium sulfite and sodium metabisulfite, and the uvioresistant powder is: rutile type titanium dioxide and an organic ultraviolet absorbent are mixed in an ethanol solution, a silane coupling agent is added to generate a mixed material, and then the mixed material is dried and ground to obtain powder.
The further improvement lies in that: in S6, the following materials are prepared according to the mass ratio: 120-130 parts of chloroprene rubber, 5-10 parts of SG-4 type PVC resin, 20-30 parts of alumina powder, 30-39 parts of barium sulfate powder, 1-2 parts of anti-aging agent RD, 15-25 parts of N220 carbon black, 1-3 parts of modified fly ash and 35-55 parts of glass fiber.
The further improvement is that: in S6, the preparation method of the modified fly ash comprises the following steps: mixing quicklime powder, gypsum powder and sodium hydroxide to obtain an active exciting agent, naturally drying wet-discharged fly ash until the water content is 17-20%, adding the active exciting agent accounting for 1: 1.2-2.5 of the wet-discharged fly ash by weight, stirring and mixing, and grinding by a ball mill until the fineness reaches 5-12% of 45 mu screen residue.
The further improvement lies in that: and S7, controlling the temperature of the internal mixer to be 85-90 ℃ until the raw materials are mixed into a jelly, wherein the glass fiber is uniformly dispersed in the jelly, then adding the weather-resistant filling particles and the corrosion-resistant filling particles for mixing, so that the weather-resistant filling particles and the corrosion-resistant filling particles are uniformly dispersed in the jelly, obtaining a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, cooling and shaping, and controlling the thickness of the coating to be 3.5-8mm.
The further improvement lies in that: in S8, a flexible interface is arranged at the end of the cast iron drain pipe, and the flexible interface specifically comprises: and a ribbed stainless steel hoop and a lining rubber ring are flexibly connected.
The invention has the beneficial effects that:
1. the weather-resistant filling particles and corrosion-resistant filling particles are mixed into the jelly and coated on the surface of the drain pipe, so that the surface of the drain pipe has various characteristics of flame retardance, static resistance, ultraviolet resistance, oxidation resistance and the like, and the tensile property of the coating layer is improved by matching the toughness of the glass fiber, so that the flexible anti-seismic performance of the cast iron drain pipe is stronger.
2. The coating material produced by the invention has good comprehensive performance, strong bonding property with metal, high mechanical property, fatigue resistance, heat resistance, aging resistance and other properties, provides a high-strength protection effect for a drain pipe, and plays a role in reinforcing and filling by adding the modified fly ash.
3. When the cast iron drain pipe is prepared, the copper and molybdenum alloy is added, so that the structure can be refined, and the strength and the hardness of cast iron are greatly improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example one
According to fig. 1, the present embodiment provides a manufacturing process of a W-shaped flexible cast iron drain pipe, which includes the following steps:
s1: selecting raw materials, namely iron-carbon alloy with carbon content of 2.5% -4%, and preparing auxiliary materials: carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum; the raw materials and the auxiliary materials are mixed according to the following mass ratio: 75 parts of iron-carbon alloy, 3.6 parts of carbon, 2 parts of silicon, 0.3 part of manganese, 0.2 part of phosphorus, 0.3 part of sulfur, 1 part of rare earth, 0.1 part of copper and 0.25 part of molybdenum; wherein, carbon is represented by graphite blocks, and silicon, manganese, phosphorus, sulfur, copper and molybdenum are represented by alloys;
s2: heating the furnace temperature to more than 1500 ℃ to smelt the iron-carbon alloy into molten iron, then adding carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum into the molten iron, heating the furnace temperature to more than 1750 ℃ and continuing smelting to obtain mixed molten iron;
s3: pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge, controlling the temperature of the molten iron to be above 1300 ℃, carrying out centrifugal casting, cooling after casting to obtain a cast iron drain pipe, and carrying out annealing treatment: heating the cast iron drain pipe to 800-880 ℃, preserving heat for 1-2 hours, then cooling the cast iron drain pipe in air to room temperature, finishing annealing, coating a layer of palm oil on the surface after annealing, maintaining for 24 hours and then cleaning;
s4: preparing a PET block, matching the PET block with flame-retardant powder to carry out melt blending and extrusion on static-resistant supplementary powder, and cooling to obtain weather-resistant filling particles; wherein, the flame retardant powder is: the polyester powder is modified by a flame retardant and then mixed with the etherimide powder, and the static electricity resisting supplementary powder is a mixture prepared by the following steps: the perovskite composite oxide powder, absolute ethyl alcohol, a dispersant and PP powder are mixed and dried to obtain the composite material;
s5; preparing PBT blocks, mixing the PBT blocks with antioxidant powder to form uvioresistant powder, melting, blending, extruding and cooling to form corrosion-resistant filling particles; wherein, the anti-oxidation powder is a powder mixture of sodium sulfite and sodium pyrosulfite, and the anti-ultraviolet powder is as follows: rutile type titanium dioxide and organic ultraviolet absorbent are mixed in ethanol solution, silane coupling agent is added to generate mixed material, and then the mixed material is dried and ground to obtain powder
S6: preparing materials according to the following mass ratio: 120 parts of chloroprene rubber, 5 parts of SG-4 type PVC resin, 20 parts of alumina powder, 30 parts of barium sulfate powder, 1 part of anti-aging agent RD, 15 parts of N220 carbon black, 1 part of modified fly ash and 35 parts of glass fiber; the preparation method of the modified fly ash comprises the following steps: mixing quicklime powder, gypsum powder and sodium hydroxide to form an active excitant, naturally drying wet fly ash until the water content is 17-20%, adding the active excitant which accounts for 1: 1.2-2.5 of the wet fly ash by weight, stirring and mixing, and grinding by a ball mill until the fineness reaches 45 mu and the screen residue is 5-12%;
s7: putting the raw materials in the S7 into an internal mixer, controlling the temperature of the internal mixer to be 85-90 ℃, mixing into a jelly, wherein glass fibers are uniformly dispersed in the jelly, then adding weather-resistant filler particles and corrosion-resistant filler particles for mixing, so that the weather-resistant filler particles and the corrosion-resistant filler particles are uniformly dispersed in the jelly to obtain a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, cooling and shaping, and controlling the thickness of the coating to be 3.5-8mm;
s8: the flexible interface is installed at the end of the cast iron drain pipe, and the flexible interface specifically comprises: and a ribbed stainless steel hoop and a lining rubber ring are flexibly connected.
Example two
According to the figure 1, the embodiment provides a manufacturing process of a W-shaped flexible cast iron drain pipe, which comprises the following steps:
s1: selecting raw materials, namely iron-carbon alloy with carbon content of 2.5% -4%, and preparing auxiliary materials: carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum; the raw materials and the auxiliary materials are mixed according to the following mass ratio: 80 parts of iron-carbon alloy, 3.5 parts of carbon, 2.5 parts of silicon, 0.4 part of manganese, 0.5 part of phosphorus, 0.35 part of sulfur, 1.2 parts of rare earth, 0.15 part of copper and 0.35 part of molybdenum; wherein, carbon is represented by graphite blocks, and silicon, manganese, phosphorus, sulfur, copper and molybdenum are represented by alloys;
s2: heating the furnace temperature to more than 1500 ℃ to smelt the iron-carbon alloy into molten iron, then adding carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum into the molten iron, heating the furnace to more than 1750 ℃ and continuing smelting to obtain mixed molten iron;
s3: pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge, controlling the temperature of the molten iron to be above 1300 ℃, carrying out centrifugal casting, cooling after casting to obtain a cast iron drain pipe, and carrying out annealing treatment: heating the cast iron drain pipe to 800-880 ℃, preserving heat for 1-2 hours, then cooling the cast iron drain pipe in air to room temperature, finishing annealing, coating a layer of palm oil on the surface after annealing, maintaining for 24 hours, and cleaning;
s4: preparing a PET block, matching the PET block with flame-retardant powder to carry out melt blending and extrusion on static-resistant supplementary powder, and cooling to obtain weather-resistant filling particles; wherein, the flame retardant powder is: the polyester powder is modified by a flame retardant and then mixed with the etherimide powder, and the static electricity resisting supplementary powder is a mixture prepared by the following steps: a mixture of perovskite composite oxide powder, absolute ethyl alcohol, a dispersing agent and PP powder is obtained after drying treatment;
s5; preparing PBT blocks, mixing the PBT blocks with antioxidant powder to form uvioresistant powder, melting, blending, extruding and cooling to form corrosion-resistant filling particles; wherein, the anti-oxidation powder is a powder mixture of sodium sulfite and sodium pyrosulfite, and the anti-ultraviolet powder is: rutile type titanium dioxide and organic ultraviolet absorbent are mixed in ethanol solution, silane coupling agent is added to generate mixed material, and then the mixed material is dried and ground to obtain powder
S6: preparing materials according to the following mass ratio: 125 parts of chloroprene rubber, 8 parts of SG-4 type PVC resin, 25 parts of alumina powder, 35 parts of barium sulfate powder, 1.5 parts of anti-aging agent RD, 20 parts of N220 carbon black, 2 parts of modified fly ash and 40 parts of glass fiber; the preparation method of the modified fly ash comprises the following steps: mixing quicklime powder, gypsum powder and sodium hydroxide to form an active excitant, naturally drying wet fly ash until the water content is 17-20%, adding the active excitant which accounts for 1: 1.2-2.5 of the wet fly ash by weight, stirring and mixing, and grinding by a ball mill until the fineness reaches 45 mu and the screen residue is 5-12%;
s7: putting the raw materials in the S7 into an internal mixer, controlling the temperature of the internal mixer to be 85-90 ℃, mixing into a jelly, wherein glass fibers are uniformly dispersed in the jelly, then adding weather-resistant filler particles and corrosion-resistant filler particles for mixing, so that the weather-resistant filler particles and the corrosion-resistant filler particles are uniformly dispersed in the jelly to obtain a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, cooling and shaping, and controlling the thickness of the coating to be 3.5-8mm;
s8: the flexible interface is installed at the end of the cast iron drain pipe, and the flexible interface specifically comprises: adopts a stainless steel hoop with ribs and a lining rubber ring for flexible connection.
EXAMPLE III
According to the figure 1, the embodiment provides a manufacturing process of a W-shaped flexible cast iron drain pipe, which comprises the following steps:
s1: selecting raw materials, namely iron-carbon alloy with carbon content of 2.5% -4%, and preparing auxiliary materials: carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum; the raw materials and the auxiliary materials are mixed according to the following mass ratio: 90 parts of iron-carbon alloy, 3.8 parts of carbon, 3 parts of silicon, 0.5 part of manganese, 0.6 part of phosphorus, 0.4 part of sulfur, 1.5 parts of rare earth, 0.2 part of copper and 0.55 part of molybdenum; wherein, carbon is represented by graphite blocks, and silicon, manganese, phosphorus, sulfur, copper and molybdenum are represented by alloys;
s2: heating the furnace temperature to more than 1500 ℃ to smelt the iron-carbon alloy into molten iron, then adding carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum into the molten iron, heating the furnace temperature to more than 1750 ℃ and continuing smelting to obtain mixed molten iron;
s3: pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge, controlling the temperature of the molten iron to be above 1300 ℃, carrying out centrifugal casting, cooling after casting to obtain a cast iron drain pipe, and carrying out annealing treatment: heating the cast iron drain pipe to 800-880 ℃, preserving heat for 1-2 hours, then cooling the cast iron drain pipe in air to room temperature, finishing annealing, coating a layer of palm oil on the surface after annealing, maintaining for 24 hours, and cleaning;
s4: preparing a PET block, matching the PET block with flame retardant powder to carry out melt blending and extrusion on static-resistant complementary powder, and cooling to obtain weather-resistant filling particles; wherein, the flame retardant powder is: the polyester powder is modified by a flame retardant and then mixed with the etherimide powder, and the static electricity resisting supplementary powder is a mixture prepared by the following steps: the perovskite composite oxide powder, absolute ethyl alcohol, a dispersant and PP powder are mixed and dried to obtain the composite material;
s5; preparing PBT blocks, mixing the PBT blocks with antioxidant powder to form uvioresistant powder, melting, blending, extruding and cooling to form corrosion-resistant filling particles; wherein, the anti-oxidation powder is a powder mixture of sodium sulfite and sodium pyrosulfite, and the anti-ultraviolet powder is as follows: rutile type titanium dioxide and an organic ultraviolet absorbent are mixed in an ethanol solution, a silane coupling agent is added to generate a mixed material, and then the mixed material is dried and ground to obtain powder;
s6: preparing materials according to the following mass ratio: 130 parts of chloroprene rubber, 10 parts of SG-4 type PVC resin, 30 parts of alumina powder, 39 parts of barium sulfate powder, 2 parts of anti-aging agent RD, 25 parts of N220 carbon black, 3 parts of modified fly ash and 55 parts of glass fiber; the preparation method of the modified fly ash comprises the following steps: mixing quicklime powder, gypsum powder and sodium hydroxide to form an active excitant, naturally drying wet fly ash until the water content is 17-20%, adding the active excitant which accounts for 1: 1.2-2.5 of the wet fly ash by weight, stirring and mixing, and grinding by a ball mill until the fineness reaches 45 mu and the screen residue is 5-12%;
s7: putting the raw materials in the S7 into an internal mixer, controlling the temperature of the internal mixer to be 85-90 ℃, mixing into a jelly, wherein glass fibers are uniformly dispersed in the jelly, then adding weather-resistant filler particles and corrosion-resistant filler particles for mixing, so that the weather-resistant filler particles and the corrosion-resistant filler particles are uniformly dispersed in the jelly to obtain a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, cooling and shaping, and controlling the thickness of the coating to be 3.5-8mm;
s8: the flexible interface is installed at the end of the cast iron drain pipe, and the flexible interface specifically comprises: adopts a stainless steel hoop with ribs and a lining rubber ring for flexible connection.
According to the first embodiment, the second embodiment and the third embodiment, the invention comprises the following components in percentage by mass: 75-90 parts of iron-carbon alloy, 3.6-3.8 parts of carbon, 2-3 parts of silicon, 0.3-0.5 part of manganese, 0.2-0.6 part of phosphorus, 0.3-0.4 part of sulfur, 1-1.5 parts of rare earth, 0.1-0.2 part of copper and 0.25-0.55 part of molybdenum, and the prepared cast iron drain pipe can refine the structure and greatly improve the strength and the hardness of cast iron;
the invention comprises the following components by mass ratio: 120-130 parts of chloroprene rubber, 5-10 parts of SG-4 type PVC resin, 20-30 parts of alumina powder, 30-39 parts of barium sulfate powder, 1-2 parts of anti-aging agent RD, 15-25 parts of N220 carbon black, 1-3 parts of modified fly ash and 35-55 parts of glass fiber.
Verification example:
| common cast iron drain pipe | The invention | |
| Tensile strength | 205MPa | 325MPa |
| Ring crush strength | 355MPa | 500MPa |
| Brinell hardness | 255HB | 190HB |
According to the invention, the PET block and the flame-retardant powder are matched with the static-resistant supplement powder to carry out melt blending and extrusion, and are cooled to form weather-resistant filling particles, the PBT block and the antioxidant powder are matched with the ultraviolet-resistant powder to carry out melt blending and extrusion, and are cooled to form corrosion-resistant filling particles, and the filling particles are mixed into the jelly and are coated on the surface of the drain pipe, so that the surface of the drain pipe has various characteristics of flame retardance, static resistance, ultraviolet resistance, oxidation resistance and the like, and the tensile property of the coating layer is improved by matching with the toughness of glass fiber, so that the flexible shock-resistant efficiency of the cast iron drain pipe is stronger, and the comprehensive performance of the surface of the cast iron drain pipe is improved. According to the invention, chloroprene rubber, SG-4 type PVC resin, alumina powder, barium sulfate powder, an anti-aging agent RD, N220 carbon black, modified fly ash and glass fiber are used for preparing a coated jelly, and the coating material produced by verification has good comprehensive performance, strong adhesion with metal, high mechanical property, fatigue resistance, heat resistance, aging resistance and other properties, provides a high-strength protection effect for a drain pipe, and has a reinforcing and filling effect by adding the modified fly ash. Meanwhile, when the cast iron drain pipe is prepared, the copper and molybdenum alloy is added, so that the structure can be refined, and the strength and the hardness of the cast iron are greatly improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A manufacturing process of a W-shaped flexible cast iron drain pipe is characterized by comprising the following steps:
s1: selecting raw materials, namely iron-carbon alloy with carbon content of 2.5% -4%, and preparing auxiliary materials: carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum;
s2: heating the furnace temperature to smelt the iron-carbon alloy into molten iron, and then adding carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum into the molten iron to obtain mixed molten iron;
s3: pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge for centrifugal casting to obtain a cast iron drain pipe, and annealing;
s4: preparing a PET block, matching the PET block with flame-retardant powder to carry out melt blending and extrusion on static-resistant supplementary powder, and cooling to obtain weather-resistant filling particles;
s5; preparing a PBT block, mixing the PBT block with antioxidant powder and uvioresistant powder for melting, blending and extruding, and cooling to form corrosion-resistant filling particles;
s6: preparing materials: chloroprene rubber, SG-4 type PVC resin, alumina powder, barium sulfate powder, an anti-aging agent RD, N220 carbon black, modified fly ash and glass fiber;
s7: putting the raw materials in the S7 into an internal mixer, mixing into a colloid, adding weather-resistant filler particles and corrosion-resistant filler particles to obtain a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, and cooling and shaping;
s8: the end of the cast iron drain pipe is provided with a flexible interface.
2. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 1, characterized in that: in the S1, the raw materials and the auxiliary materials are mixed according to the following mass ratio: 75-90 parts of iron-carbon alloy, 3.6-3.8 parts of carbon, 2-3 parts of silicon, 0.3-0.5 part of manganese, 0.2-0.6 part of phosphorus, 0.3-0.4 part of sulfur, 1-1.5 parts of rare earth, 0.1-0.2 part of copper and 0.25-0.55 part of molybdenum.
3. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 1, characterized in that: and in the S2, the temperature of the furnace is increased to more than 1500 ℃ to smelt the iron-carbon alloy, then carbon, silicon, manganese, phosphorus, sulfur, rare earth, copper and molybdenum are added into molten iron, the temperature of the furnace is increased to more than 1750 ℃, and smelting is continued to obtain mixed molten iron.
4. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 3, wherein the manufacturing process comprises the following steps: and S3, pouring the smelted mixed molten iron into a W-shaped pipe die of a centrifuge, controlling the temperature of the molten iron to be above 1300 ℃, cooling after centrifugal casting to obtain a cast iron drain pipe, heating the cast iron drain pipe to 800-880 ℃ during annealing treatment, preserving heat for 1-2 hours, then air-cooling the cast iron drain pipe to room temperature, finishing annealing, coating a layer of palm oil on the surface after annealing, maintaining for 24 hours, and cleaning.
5. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 1, characterized in that: in S4, the flame retardant powder is as follows: the polyester powder is modified by a flame retardant and then mixed with the etherimide powder, and the static electricity resisting supplementary powder is a mixture prepared by the following steps: the perovskite composite oxide powder, the absolute ethyl alcohol, the dispersing agent and the PP powder are dried to obtain the composite material.
6. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 5, wherein the manufacturing process comprises the following steps: in S5, the antioxidant powder is a powder mixture of sodium sulfite and sodium metabisulfite, and the uvioresistant powder is: rutile type titanium dioxide and an organic ultraviolet absorbent are mixed in an ethanol solution, a silane coupling agent is added to generate a mixed material, and then the mixed material is dried and ground to obtain powder.
7. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 1, characterized in that: in S6, the following materials are prepared according to the mass ratio: 120-130 parts of chloroprene rubber, 5-10 parts of SG-4 type PVC resin, 20-30 parts of alumina powder, 30-39 parts of barium sulfate powder, 1-2 parts of anti-aging agent RD, 15-25 parts of N220 carbon black, 1-3 parts of modified fly ash and 35-55 parts of glass fiber.
8. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 7, characterized in that: in S6, the preparation method of the modified fly ash comprises the following steps: mixing quicklime powder, gypsum powder and sodium hydroxide to obtain an active exciting agent, naturally drying wet-discharged fly ash until the water content is 17-20%, adding the active exciting agent accounting for 1: 1.2-2.5 of the wet-discharged fly ash by weight, stirring and mixing, and grinding by a ball mill until the fineness reaches 5-12% of 45 mu screen residue.
9. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 1, characterized in that: and S7, controlling the temperature of the internal mixer to be 85-90 ℃ until the raw materials are mixed into a jelly, wherein the glass fiber is uniformly dispersed in the jelly, then adding the weather-resistant filling particles and the corrosion-resistant filling particles for mixing, so that the weather-resistant filling particles and the corrosion-resistant filling particles are uniformly dispersed in the jelly, obtaining a coating material, coating the coating material on the outer side of the cast iron drain pipe obtained in the S4, cooling and shaping, and controlling the thickness of the coating to be 3.5-8mm.
10. The manufacturing process of the W-shaped flexible cast iron drain pipe according to claim 1, characterized in that: in S8, a flexible interface is arranged at the end of the cast iron drain pipe, and the flexible interface specifically comprises the following components: and a ribbed stainless steel hoop and a lining rubber ring are flexibly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210985716.6A CN115325283A (en) | 2022-08-17 | 2022-08-17 | Manufacturing process of W-shaped flexible cast iron drain pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210985716.6A CN115325283A (en) | 2022-08-17 | 2022-08-17 | Manufacturing process of W-shaped flexible cast iron drain pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115325283A true CN115325283A (en) | 2022-11-11 |
Family
ID=83924413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210985716.6A Withdrawn CN115325283A (en) | 2022-08-17 | 2022-08-17 | Manufacturing process of W-shaped flexible cast iron drain pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115325283A (en) |
-
2022
- 2022-08-17 CN CN202210985716.6A patent/CN115325283A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102134444A (en) | Temperature-resistance thermal-insulation heavy-duty anticorrosion coating | |
| CN103524817A (en) | Cold-resistant oil-resistant modified chloroprene rubber cable material | |
| CN103601943B (en) | A kind of crosslinked PE water service pipe | |
| CN111850197B (en) | Method for increasing proportion of blast furnace smelting lump ore | |
| CN114437617A (en) | High-toughness glass flake daub and preparation method thereof | |
| CN102391773A (en) | Elastic wind sand/wear and corrosion/weather/temperature change resistant paint and preparation method thereof | |
| CN103435923A (en) | Manufacture method of composite rubber material | |
| CN115325283A (en) | Manufacturing process of W-shaped flexible cast iron drain pipe | |
| CN108948499B (en) | Impact-resistant high-strength polyethylene communication pipe and preparation method thereof | |
| CN103571089A (en) | High-impact-resistance PVC (polyvinyl chloride) sheath material for cables and preparation method thereof | |
| CN116553880B (en) | Crack-resistant and antifreezing cement-based material, and preparation method and application thereof | |
| CN115108820B (en) | Preparation method of high-temperature-resistant wear-resistant ceramic coating | |
| CN109096868A (en) | A kind of epoxy ceramic coating of fibre reinforced and preparation method thereof | |
| CN104513587A (en) | Bad-flavor-free multifunctional electric power equipment casing rust-resisting paint preparation method thereof | |
| CN107631102B (en) | Anti-aging ventilating duct | |
| CN104774409A (en) | High-temperature-resistant rubber tube | |
| CN103497407B (en) | A kind of anti-aging PE water service pipe | |
| CN105541191A (en) | Anti-collapse high-strength concrete | |
| CN113736178A (en) | Corrosion-resistant MPP power cable protection pipe and production process thereof | |
| CN105838965A (en) | Alloy steel material for engine piston | |
| CN107501926B (en) | Water inlet and outlet chamber of automobile radiator | |
| CN108841294A (en) | A kind of epoxy ceramic coating of glass fiber reinforcement and preparation method thereof | |
| CN110142106A (en) | A kind of cooling screening machine of aluminium ash | |
| CN204803842U (en) | Ecological graticule mesh that titanium dioxide and boron carnbide composite polyvinyl chloride steel wire were made | |
| CN1229468C (en) | Method and sealing glue for preventing heat leakage of boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221111 |