CN115627118A - Ball valve casting and machining process thereof - Google Patents
Ball valve casting and machining process thereof Download PDFInfo
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- CN115627118A CN115627118A CN202211324130.1A CN202211324130A CN115627118A CN 115627118 A CN115627118 A CN 115627118A CN 202211324130 A CN202211324130 A CN 202211324130A CN 115627118 A CN115627118 A CN 115627118A
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- 238000005266 casting Methods 0.000 title claims abstract description 65
- 238000003754 machining Methods 0.000 title claims description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 74
- 238000000576 coating method Methods 0.000 claims abstract description 74
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 66
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 36
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 239000010445 mica Substances 0.000 claims abstract description 24
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 24
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 21
- NZIOVLXULSCCSG-UHFFFAOYSA-N [2-(dimethylcarbamoyl)phenyl]boronic acid Chemical compound CN(C)C(=O)C1=CC=CC=C1B(O)O NZIOVLXULSCCSG-UHFFFAOYSA-N 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 21
- RZURDERFVOUZFX-UHFFFAOYSA-N 3-(2-fluorophenyl)propanal Chemical compound FC1=CC=CC=C1CCC=O RZURDERFVOUZFX-UHFFFAOYSA-N 0.000 claims abstract description 18
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims description 30
- 239000000839 emulsion Substances 0.000 claims description 24
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 20
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 19
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 claims description 18
- PXHIYFMTRHEUHZ-UHFFFAOYSA-N 5-hydroxy-2-benzofuran-1,3-dione Chemical compound OC1=CC=C2C(=O)OC(=O)C2=C1 PXHIYFMTRHEUHZ-UHFFFAOYSA-N 0.000 claims description 15
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 13
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical group NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 8
- 229960001124 trientine Drugs 0.000 claims description 8
- 230000003749 cleanliness Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005488 sandblasting Methods 0.000 claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 7
- 239000007795 chemical reaction product Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- 229910002808 Si–O–Si Inorganic materials 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- GOUHYARYYWKXHS-UHFFFAOYSA-N 4-formylbenzoic acid Chemical group OC(=O)C1=CC=C(C=O)C=C1 GOUHYARYYWKXHS-UHFFFAOYSA-N 0.000 description 2
- RGHHSNMVTDWUBI-UHFFFAOYSA-N 4-hydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1 RGHHSNMVTDWUBI-UHFFFAOYSA-N 0.000 description 2
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- HXITXNWTGFUOAU-UHFFFAOYSA-N phenylboronic acid Chemical compound OB(O)C1=CC=CC=C1 HXITXNWTGFUOAU-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- -1 4-hydroxybenzene anhydride Chemical class 0.000 description 1
- FEPBITJSIHRMRT-UHFFFAOYSA-N 4-hydroxybenzenesulfonic acid Chemical group OC1=CC=C(S(O)(=O)=O)C=C1 FEPBITJSIHRMRT-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/02—Polysilicates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0657—Particular coverings or materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to a ball valve casting, wherein the surface of the ball valve casting is coated with a high-temperature-resistant coating, and the coating components of the high-temperature-resistant coating comprise tetraethoxysilane, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, methylbenzene, a curing agent and water; and also relates to a processing technology of the ball valve casting. In the application, the tetraethoxysilane takes Si-O-Si as a main chain, and has large silicon-oxygen bond energy and strong high-temperature resistance; the reaction product of 2- (dimethylcarbamoyl) phenylboronic acid and 3- (2-fluorophenyl) propionaldehyde extends outwards through a phenyl cyclic large pi-bond structure, and a firm C-F bond is introduced, so that a silicon-oxygen bond is not easy to attack, and the chain stability is higher; under the acidic condition, the hydroxyl of the reaction product is cooperated with the ethylene glycol and the ethyl orthosilicate to generate modified ethyl polysilicate, so that the toughness of the organic silicon coating is improved; mica and ceramic fiber are added to reduce the thermal conductivity and improve the high temperature resistance.
Description
Technical Field
The application relates to the technical field of valve casting machining, in particular to a ball valve casting and a machining process thereof.
Background
The valve casting is a control part in a pipeline fluid conveying system, and the valve is used for changing the section of a passage and the flowing direction of a medium and has the functions of diversion, stopping, regulation, throttling, non-return, diversion or overflow pressure relief and the like; a conventional ball valve casting includes a valve body and a valve cover.
Chinese patent publication No. CN104976401A discloses a ball valve casting, which includes a valve body and a valve cover. The valve body is provided with a first through hole which is sequentially divided into a first circular hole section, a second circular hole section, a first inner spherical surface section and a third circular hole section from one end to the other end; the valve cover is provided with a second through hole, the second through hole is sequentially divided into a second inner spherical surface section, a fourth circular hole section and a fifth circular hole section from one end to the other end of the second through hole, and the fourth circular hole section and the fifth circular hole section are arranged concentrically.
In view of the above-mentioned related arts, the inventors believe that the current ball valve castings are not suitable for the harsh high temperature environment, and thus still need to be improved.
Disclosure of Invention
In order to improve the high temperature resistance of a ball valve casting, the application provides a ball valve casting and a machining process thereof.
First aspect, the following technical scheme is adopted to a ball valve foundry goods that this application provided:
the ball valve casting is coated with a high-temperature-resistant coating on the surface, and the high-temperature-resistant coating comprises the following coating components in parts by weight:
40-50 parts of ethyl orthosilicate;
12-15 parts of 2- (dimethylcarbamoyl) phenylboronic acid;
6-8 parts of 3- (2-fluorophenyl) propanal;
1-2 parts of palladium chloride;
2-4 parts of mica;
1-2 parts of ceramic fiber;
1-2 parts of sodium silicate;
8-10 parts of ethylene glycol;
3-5 parts of toluene;
1-2 parts of a curing agent;
30-40 parts of water.
By adopting the technical scheme, the tetraethoxysilane takes Si-O-Si as a main chain, the silicon-oxygen bond energy is large, the high-temperature resistance is strong, the silicon-oxygen bond electronegativity is large, the polarity of the bond is large, a shielding effect on a hydrocarbyl group can be realized, and the oxidation stability is improved; 2- (dimethylcarbamoyl) phenylboronic acid and 3- (2-fluorophenyl) propionaldehyde reaction products are blended with ethyl orthosilicate, and the phenyl ring large pi bond structure extends outwards, and a firm C-F bond is introduced, so that silicon-oxygen bonds of organic silicon are not easy to attack, the chain stability is higher, a synergistic effect is generated, and the high temperature resistance is improved; in addition, under an acidic condition, the reaction product of 2- (dimethylcarbamoyl) phenylboronic acid and 3- (2-fluorophenyl) propionaldehyde forms hydroxyl, and the hydroxyl cooperates with ethylene glycol and ethyl orthosilicate to generate modified ethyl polysilicate, so that the toughness of the organic silicon coating is improved, and the film forming life is prolonged; mica with better high temperature resistance can be tiled and arranged in coating components, scattered particles can be effectively gathered through the reaction of the components, a bridging effect is achieved in the coating, and the addition of ceramic fibers enables the coating to form a three-dimensional network structure, so that the heat insulation performance is ensured; the sodium silicate is used as a bonding agent, so that the mica, the ceramic fiber and the organic component are combined, the heat conductivity of the high-temperature-resistant coating is reduced, and the high-temperature-resistant performance is improved.
Preferably, the high-temperature-resistant coating further comprises 4-6 parts of styrene-acrylic emulsion and 1-2 parts of polyvinylamine according to parts by weight.
By adopting the technical scheme, the high-temperature-resistant styrene-acrylic emulsion and the polyvinylamine are further added into the high-temperature-resistant coating component to assist in film formation, the polyvinylamine is a water-soluble polymer, fusion among styrene-acrylic emulsion particles can be inhibited, porosity is promoted, and pores of a porous structure are filled with air with a small heat conductivity coefficient, so that the heat conductivity coefficient can be reduced, and the high-temperature resistance is improved.
Preferably, the high-temperature resistant coating further comprises 2-4 parts by weight of glycidyl acrylate, 2-3 parts by weight of 4-hydroxy phthalic anhydride, 0.6-0.8 part by weight of sodium dodecyl sulfate and 0.1-0.2 part by weight of potassium persulfate.
By adopting the technical scheme, the styrene-acrylic emulsion is modified by using the functional monomers of 4-hydroxy phthalic anhydride and glycidyl acrylate in the presence of the emulsifier sodium dodecyl sulfate and the initiator potassium persulfate, so that the thermal stability is improved, and the aim of improving the performance of the high-temperature-resistant coating is fulfilled.
Preferably, the styrene-acrylic emulsion comprises the following components in parts by weight: glycidyl acrylate: 4-hydroxyphthalic anhydride =6:3:2.
preferably, the paint also comprises 1-2 parts of silane coupling agent by weight.
By adopting the technical scheme, the compatibility of the ethyl orthosilicate and each component is improved by utilizing the coupling characteristic of the silane coupling agent, and organic compounding is realized, so that the high-temperature-resistant coating with better performance is obtained.
Preferably, the curing agent is triethylene tetramine; the silane coupling agent is KH-550.
In a second aspect, the application provides a machining process of a ball valve casting, which adopts the following technical scheme:
a machining process of a ball valve casting comprises the following steps:
s1, preparing a coating of a high-temperature-resistant coating; blending 2- (dimethylcarbamoyl) phenylboronic acid with 3- (2-fluorophenyl) propionaldehyde, methylbenzene and palladium chloride, heating to 80-90 ℃, and stirring for reacting for 3-4 hours to obtain a product A;
mixing tetraethoxysilane, the product A, ethylene glycol and 25-30 parts of water at 70-75 ℃, adjusting the pH to be 5-5.5, and stirring for 3-4h; then adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuing stirring for 1-1.2h to prepare the coating;
s2, surface treatment of the ball valve casting; carrying out sand blasting treatment on the surface of the ball valve casting to ensure that the surface cleanliness reaches Sa2.5 grade and the surface roughness reaches 30-40 mu m;
spraying 4-5 layers of the coating prepared by the step S1 on the surface of the ball valve casting by using a spray gun, wherein the thickness of each layer is 30-45 mu m, the spraying distance is 220-280mm, and the pressure of the spray gun is 1.2-1.6MPa;
drying at 100-130 deg.C for 30-40min, and cooling to obtain treated ball valve casting.
Preferably, the S1 further includes the steps of: blending 4-6 parts of styrene-acrylic emulsion and 1-2 parts of polyvinylamine, adding 2-4 parts of glycidyl acrylate, 2-3 parts of 4-hydroxy phthalic anhydride, 0.6-0.8 part of sodium dodecyl sulfate and 0.1-0.2 part of potassium persulfate, and reacting for 3-4 hours at the temperature of 80-90 ℃ to obtain a product B;
mixing 40-50 parts of tetraethoxysilane, a product A, 8-10 parts of ethylene glycol and 25-30 parts of water at 70-75 ℃, adjusting the pH =5-5.5, and stirring for 3-4h; then adding the product B and 1-2 parts of silane coupling agent, and continuing stirring for 50-60min; and finally, adding 2-4 parts of mica, 1-2 parts of ceramic fiber, 1-2 parts of sodium silicate, 1-2 parts of curing agent and the rest water, and continuously stirring for 1-1.2 hours to prepare the coating.
To sum up, the application comprises the following beneficial technical effects:
1. the tetraethoxysilane takes Si-O-Si as a main chain, and has large silicon-oxygen bond energy and strong high-temperature resistance; the silicon-oxygen bond has large electronegativity difference, so that the bond has large polarity, a shielding effect on a hydrocarbon group can be realized, and the oxidation stability is improved; 2- (dimethylcarbamoyl) phenylboronic acid and 3- (2-fluorophenyl) propionaldehyde reaction products are blended with ethyl orthosilicate, and the phenyl ring large pi bond structure extends outwards, and a firm C-F bond is introduced, so that silicon-oxygen bonds of organic silicon are not easy to attack, the chain stability is higher, a synergistic effect is generated, and the high temperature resistance is improved; under the acidic condition, the reaction product of 2- (dimethylcarbamoyl) phenylboronic acid and 3- (2-fluorophenyl) propionaldehyde forms hydroxyl, and the hydroxyl cooperates with ethylene glycol and tetraethoxysilane to generate modified polyethyl silicate, so that the toughness of the organic silicon coating is improved; the sodium silicate is used as a bonding agent, so that the mica, the ceramic fiber and the organic component are combined, the heat conductivity of the high-temperature-resistant coating is reduced, and the high-temperature-resistant performance is improved;
2. high-temperature-resistant styrene-acrylic emulsion and polyvinylamine are further added into the high-temperature-resistant coating component to assist in film formation, and the polyvinylamine is a water-soluble polymer, so that fusion among styrene-acrylic emulsion particles can be inhibited, porosity is promoted, and pores of a porous structure are filled with air with a small heat conductivity coefficient, so that the heat conductivity coefficient can be reduced, and the high-temperature resistance is improved;
3. the styrene-acrylic emulsion is modified by using a functional monomer 4-hydroxy phthalic anhydride and glycidyl acrylate in the presence of an emulsifier sodium dodecyl sulfate and an initiator potassium persulfate, so that the thermal stability is improved, and the aim of improving the performance of a high-temperature-resistant coating is fulfilled.
Detailed Description
The present application is described in further detail below.
In the present application, ethyl orthosilicate is provided by jingle (Hunan) chemical company, ltd; 2- (dimethylcarbamoyl) phenylboronic acid was supplied by Hubei Hongxin Riyu Fine chemical Co., ltd; mica is supplied by Hebei Wenhao products, inc. with 60-80 mesh; the ceramic fiber is provided by a mineral processing factory of Jiade, lingshu county, the product number is JD-TCXW1, and the specification is 1.0-3.5mm; the styrene-acrylic emulsion is styrene-acrylic polymer emulsion provided by En chemical industry Co., ltd, anhui, model WC-SA220, brand DUSUE; polyvinylamine is supplied by Wuhanrong Brilliant Biotech Ltd; glycidyl acrylate was supplied by Wuhanxin Jiali Biotech, inc., cat # A1045; the silane coupling agent is KH-550.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Examples
Example 1
The embodiment discloses a ball valve casting and a processing technology thereof; a ball valve casting, the surface of which is coated with a high-temperature resistant coating, wherein the high-temperature resistant coating comprises the following coating components: ethyl orthosilicate, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, methylbenzene, a curing agent and water, wherein the curing agent is triethylene tetramine; the contents of the components are shown in table 1 below.
A machining process of a ball valve casting comprises the following steps:
s1, preparing a coating of a high-temperature-resistant coating; blending 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, toluene and palladium chloride, heating to 80 ℃, and stirring for reacting for 3 hours to obtain a product A;
mixing ethyl orthosilicate, the product A, ethylene glycol and 25 parts of water at 70 ℃, adjusting the pH =5, and stirring for 3 hours; then adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuously stirring for 1h to prepare the coating;
s2, surface treatment of the ball valve casting; carrying out sand blasting treatment on the surface of the ball valve casting to ensure that the surface cleanliness reaches Sa2.5 grade and the surface roughness reaches 30 mu m;
spraying 4 layers of the coating prepared by the S1 on the surface of the ball valve casting by using a spray gun, wherein the thickness of each layer is 30 mu m, the spraying distance is 220mm, and the pressure of the spray gun is 1.2MPa;
drying at 100 ℃ for 30min, and cooling to obtain a treated ball valve casting.
Example 2
The embodiment discloses a ball valve casting and a machining process thereof; a ball valve casting, the surface of which is coated with a high-temperature resistant coating, wherein the high-temperature resistant coating comprises the following coating components: ethyl orthosilicate, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, methylbenzene, a curing agent and water, wherein the curing agent is triethylene tetramine; the contents of the components are shown in table 1 below.
A machining process of a ball valve casting comprises the following steps:
s1, preparing a coating of a high-temperature-resistant coating; blending 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, methylbenzene and palladium chloride, heating to 90 ℃, and stirring for reacting for 4 hours to obtain a product A;
mixing tetraethoxysilane, the product A, ethylene glycol and 30 parts of water at 75 ℃, adjusting the pH =5.5, and stirring for 4 hours; then adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuously stirring for 1.2h to prepare the coating;
s2, surface treatment of the ball valve casting; carrying out sand blasting treatment on the surface of the ball valve casting to ensure that the surface cleanliness reaches Sa2.5 grade and the surface roughness reaches 40 mu m;
spraying 5 layers of the coating prepared by the S1 on the surface of the ball valve casting by using a spray gun, wherein the thickness of each layer is 45 mu m, the spraying distance is 280mm, and the pressure of the spray gun is 1.6MPa;
drying at 130 ℃ for 40min, and cooling to obtain the treated ball valve casting.
Example 3
The embodiment discloses a ball valve casting and a processing technology thereof; a high-temperature-resistant coating is coated on the surface of a ball valve casting, and comprises the following coating components: ethyl orthosilicate, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, toluene, a curing agent and water, wherein the curing agent is triethylene tetramine; the contents of the components are shown in table 1 below.
A machining process of a ball valve casting comprises the following steps:
s1, preparing a coating of a high-temperature-resistant coating; blending 2- (dimethylcarbamoyl) phenylboronic acid with 3- (2-fluorophenyl) propionaldehyde, methylbenzene and palladium chloride, heating to 85 ℃, and stirring for reacting for 3.5 hours to obtain a product A;
mixing ethyl orthosilicate, the product A, ethylene glycol and 27 parts of water at 73 ℃, adjusting the pH =5, and stirring for 3.5h; then adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuously stirring for 1.1h to prepare the coating;
s2, surface treatment of the ball valve casting; carrying out sand blasting treatment on the surface of the ball valve casting to ensure that the surface cleanliness reaches Sa2.5 grade and the surface roughness reaches 35 mu m;
spraying 4 layers of the coating prepared by the S1 on the surface of the ball valve casting by using a spray gun, wherein the thickness of each layer is 40 mu m, the spraying distance is 250mm, and the pressure of the spray gun is 1.4MPa;
drying at 120 ℃ for 35min, and cooling to obtain the treated ball valve casting.
Example 4
The difference from the embodiment 1 is that the embodiment discloses a ball valve casting and a processing technology thereof; a ball valve casting, the surface of which is coated with a high-temperature resistant coating, wherein the high-temperature resistant coating comprises the following coating components: ethyl orthosilicate, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, toluene, a curing agent, water, a styrene-acrylic emulsion, polyvinylamine, glycidyl acrylate, 4-hydroxyphthalic anhydride, sodium dodecyl sulfate, potassium persulfate and a silane coupling agent, wherein the curing agent is triethylene tetramine, and the silane coupling agent is KH-550; the contents of the components are shown in table 1 below.
A machining process of a ball valve casting is disclosed, and S1 further comprises the following steps:
blending the styrene-acrylic emulsion and the polyvinylamine, adding glycidyl acrylate, 4-hydroxy phthalic anhydride, sodium dodecyl sulfate and potassium persulfate, and reacting for 3 hours at the temperature of 80 ℃ to obtain a product B;
mixing ethyl orthosilicate, the product A, ethylene glycol and 25 parts of water at 70 ℃, adjusting the pH =5, and stirring for 3 hours; then adding the product B and a silane coupling agent, and continuously stirring for 50min; finally, adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuously stirring for 1h to prepare the coating.
Example 5
The difference from the embodiment 2 is that the embodiment discloses a ball valve casting and a processing technology thereof; a high-temperature-resistant coating is coated on the surface of a ball valve casting, and comprises the following coating components: ethyl orthosilicate, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, toluene, a curing agent, water, a styrene-acrylic emulsion, polyvinylamine, glycidyl acrylate, 4-hydroxyphthalic anhydride, sodium dodecyl sulfate, potassium persulfate and a silane coupling agent, wherein the curing agent is triethylene tetramine, and the silane coupling agent is KH-550; the contents of the components are shown in table 1 below.
The machining process of the ball valve casting S1 further comprises the following steps:
blending the styrene-acrylic emulsion and the polyvinylamine, adding glycidyl acrylate, 4-hydroxy phthalic anhydride, sodium dodecyl sulfate and potassium persulfate, and carrying out heat preservation reaction for 4 hours at 90 ℃ to obtain a product B;
mixing tetraethoxysilane, the product A, ethylene glycol and 30 parts of water at 5 ℃, adjusting the pH to be =5.5, and stirring for 4 hours; then adding the product B and a silane coupling agent, and continuously stirring for 60min; finally, adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuously stirring for 1.2h to prepare the coating.
Example 6
The difference from the embodiment 3 is that the embodiment discloses a ball valve casting and a processing technology thereof; a ball valve casting, the surface of which is coated with a high-temperature resistant coating, wherein the high-temperature resistant coating comprises the following coating components: ethyl orthosilicate, 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, palladium chloride, mica, ceramic fiber, sodium silicate, ethylene glycol, toluene, a curing agent, water, a styrene-acrylic emulsion, polyvinylamine, glycidyl acrylate, 4-hydroxyphthalic anhydride, sodium dodecyl sulfate, potassium persulfate and a silane coupling agent, wherein the curing agent is triethylene tetramine, and the silane coupling agent is KH-550; the contents of the components are shown in table 1 below.
The machining process of the ball valve casting S1 further comprises the following steps:
blending styrene-acrylic emulsion and polyvinylamine, adding glycidyl acrylate, 4-hydroxy phthalic anhydride, sodium dodecyl sulfate and potassium persulfate, and reacting for 3.5 hours at the temperature of 85 ℃ to obtain a product B;
mixing ethyl orthosilicate, the product A, ethylene glycol and 27 parts of water at 73 ℃, adjusting the pH =5, and stirring for 3.5h; then adding the product B and a silane coupling agent, and continuously stirring for 55min; finally, adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuously stirring for 1.1h to prepare the coating.
Example 7
The difference from example 1 is that the coating components of the high temperature resistant coating further include styrene-acrylic emulsion and polyvinylamine, and the content of each component is shown in table 2 below.
Example 8
The difference from example 7 is that the coating components of the high temperature resistant coating further include glycidyl acrylate, 4-hydroxybenzene anhydride, sodium dodecyl sulfate and potassium persulfate, and the contents of each component are shown in table 2 below.
Example 9
The difference from example 8 is that the styrene-acrylic emulsion was replaced with an acrylic emulsion, and the contents of the respective components are shown in table 2 below.
Example 10
The difference from example 8 is that glycidyl acrylate was replaced with ethyl acetate and the contents of the components are shown in table 2 below.
Example 11
The difference from example 8 is that 4-hydroxybenzaldehyde is replaced with 4-carboxybenzaldehyde and the contents of the respective components are shown in Table 2 below.
Example 12
The difference from the embodiment 4 is that, in parts by weight, the styrene-acrylic emulsion: glycidyl acrylate: 4-hydroxyphthalic anhydride =6:3:2, the contents of the components are shown in the following table 2.
Example 13
The difference from example 1 is that the coating component of the high temperature resistant coating further comprises a silane coupling agent KH-550, and the content of each component is shown in Table 2 below.
Example 14
The difference from example 13 is that the silane coupling agent is Kh-560.
Example 15
The difference from example 1 is that the curing agent is p-hydroxybenzene sulfonic acid.
Comparative example
Comparative example 1
The difference from example 1 is that the coating composition of the high-temperature-resistant coating is only 40 parts of tetraethoxysilane, 1 part of curing agent and 30 parts of water.
Comparative example 2
The difference from example 1 is that 2- (dimethylcarbamoyl) phenylboronic acid is replaced by phenylboronic acid.
Comparative example 3
The difference from example 1 is that 3- (2-fluorophenyl) propanal is replaced by benzaldehyde.
TABLE 1 ingredient content table for examples 1-6
TABLE 2 ingredient content tables for examples 7-13
Performance test
The test method comprises the following steps: carrying out high temperature resistance test on the ball valve casting samples treated in the embodiments and the comparative examples, wherein the ball valve casting samples have the dimensions of 50mm multiplied by 20mm multiplied by 2mm; testing the yield strength of the sample by using a tensile testing machine at the conditions of normal temperature of 25 ℃ and 400 ℃, wherein the tensile speed is 15mm/min, the yield strength difference between 400 ℃ and normal temperature of 25 ℃ represents the high temperature resistance, and the smaller the difference is, the higher the mechanical property maintenance degree is, the stronger the high temperature resistance is; the test results are shown in table 3 below.
TABLE 3 table of results of performance test of each example and comparative example
| Yield strength difference/MPa | |
| Example 1 | 58 |
| Example 2 | 54 |
| Example 3 | 57 |
| Example 4 | 38 |
| Example 5 | 33 |
| Example 6 | 36 |
| Example 7 | 51 |
| Example 8 | 42 |
| Example 9 | 47 |
| Example 10 | 46 |
| Example 11 | 46 |
| Example 12 | 36 |
| Example 13 | 55 |
| Example 14 | 56 |
| Example 15 | 59 |
| Comparative example 1 | 92 |
| Comparative example 2 | 80 |
| Comparative example 3 | 75 |
The present embodiment is only for explaining the present application, and the scope of protection of the present application is not limited thereby, and those skilled in the art can make modifications to the present embodiment as necessary without inventive contribution after reading the present specification, but all are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A ball valve casting which characterized in that: the surface of the ball valve casting is coated with a high-temperature-resistant coating, and the high-temperature-resistant coating comprises the following coating components in parts by weight:
40-50 parts of ethyl orthosilicate;
12-15 parts of 2- (dimethylcarbamoyl) phenylboronic acid;
6-8 parts of 3- (2-fluorophenyl) propanal;
1-2 parts of palladium chloride;
2-4 parts of mica;
1-2 parts of ceramic fiber;
1-2 parts of sodium silicate;
8-10 parts of ethylene glycol;
3-5 parts of toluene;
1-2 parts of a curing agent;
30-40 parts of water.
2. A ball valve casting as defined in claim 1 wherein: the high-temperature-resistant coating also comprises 4-6 parts of styrene-acrylic emulsion and 1-2 parts of polyvinylamine according to parts by weight.
3. A ball valve casting as defined in claim 2 wherein: the high-temperature-resistant coating further comprises 2-4 parts of glycidyl acrylate, 2-3 parts of 4-hydroxy phthalic anhydride, 0.6-0.8 part of sodium dodecyl sulfate and 0.1-0.2 part of potassium persulfate according to parts by weight.
4. A ball valve casting as defined in claim 3 wherein: according to the parts by weight, the styrene-acrylic emulsion comprises the following components: glycidyl acrylate: 4-hydroxyphthalic anhydride =6:3:2.
5. a ball valve casting as defined in claim 1 wherein: according to parts by weight, the paint also comprises 1-2 parts of silane coupling agent.
6. A ball valve casting as defined in claim 5 wherein: the curing agent is triethylene tetramine; the silane coupling agent is KH-550.
7. A process for manufacturing a ball valve casting as described in claim 1, comprising the steps of:
s1, preparing a coating of a high-temperature-resistant coating; blending 2- (dimethylcarbamoyl) phenylboronic acid, 3- (2-fluorophenyl) propionaldehyde, toluene and palladium chloride, heating to 80-90 ℃, and stirring for reacting for 3-4h to obtain a product A;
mixing tetraethoxysilane, the product A, ethylene glycol and 25-30 parts of water at 70-75 ℃, adjusting the pH to be 5-5.5, and stirring for 3-4h; then adding mica, ceramic fiber, sodium silicate, curing agent and the rest water, and continuing stirring for 1-1.2h to prepare the coating;
s2, surface treatment of the ball valve casting; carrying out sand blasting treatment on the surface of the ball valve casting to ensure that the surface cleanliness reaches Sa2.5 grade and the surface roughness reaches 30-40 mu m;
spraying 4-5 layers of the coating prepared by the S1 on the surface of the ball valve casting by using a spray gun, wherein the thickness of each layer is 30-45 mu m, the spraying distance is 220-280mm, and the pressure of the spray gun is 1.2-1.6MPa;
drying at 100-130 deg.C for 30-40min, and cooling to obtain treated ball valve casting.
8. The machining process of a ball valve casting according to claim 7, characterized in that: the S1 further comprises the following steps: blending 4-6 parts of styrene-acrylic emulsion and 1-2 parts of polyvinylamine, adding 2-4 parts of glycidyl acrylate, 2-3 parts of 4-hydroxy phthalic anhydride, 0.6-0.8 part of sodium dodecyl sulfate and 0.1-0.2 part of potassium persulfate, and reacting for 3-4 hours at the temperature of 80-90 ℃ to obtain a product B;
mixing 40-50 parts of tetraethoxysilane, a product A, 8-10 parts of ethylene glycol and 25-30 parts of water at 70-75 ℃, adjusting the pH =5-5.5, and stirring for 3-4h; then adding the product B and 1-2 parts of silane coupling agent, and continuing stirring for 50-60min; and finally, adding 2-4 parts of mica, 1-2 parts of ceramic fiber, 1-2 parts of sodium silicate, 1-2 parts of curing agent and the rest water, and continuously stirring for 1-1.2 hours to obtain the coating.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011512A1 (en) * | 2004-07-28 | 2006-02-02 | Dainippon Ink And Chemicals, Inc. | Organic-inorganic composite coating film and aqueous coating composition |
| JP2012246440A (en) * | 2011-05-30 | 2012-12-13 | Nippon Paint Co Ltd | Inorganic coating composition |
| CN114350428A (en) * | 2022-01-11 | 2022-04-15 | 温州市海格阀门有限公司 | Antirust butterfly valve casting and machining method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011512A1 (en) * | 2004-07-28 | 2006-02-02 | Dainippon Ink And Chemicals, Inc. | Organic-inorganic composite coating film and aqueous coating composition |
| JP2012246440A (en) * | 2011-05-30 | 2012-12-13 | Nippon Paint Co Ltd | Inorganic coating composition |
| CN114350428A (en) * | 2022-01-11 | 2022-04-15 | 温州市海格阀门有限公司 | Antirust butterfly valve casting and machining method thereof |
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