CN107796445A - A kind of flowmeter with protective cover - Google Patents
A kind of flowmeter with protective cover Download PDFInfo
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- CN107796445A CN107796445A CN201711279269.8A CN201711279269A CN107796445A CN 107796445 A CN107796445 A CN 107796445A CN 201711279269 A CN201711279269 A CN 201711279269A CN 107796445 A CN107796445 A CN 107796445A
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-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3802—Low-molecular-weight compounds having heteroatoms other than oxygen having halogens
- C08G18/3804—Polyhydroxy compounds
- C08G18/3806—Polyhydroxy compounds having chlorine and/or bromine atoms
- C08G18/381—Polyhydroxy compounds having chlorine and/or bromine atoms having bromine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
- C08G18/6677—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a kind of flowmeter with protective cover, including flow meter head and flowtube, flowtube is hollow tubular structure, and flowtube is made up of feed tube and drain pipe connection, flow meter head is located at the middle part of the flowtube length direction, and protective cover is also arranged with outside flow meter head；The present invention is simple and compact for structure, has good water resistance, easy installation and removal, service life length.
Description
Technical field
The present invention relates to a kind of flowmeter, and in particular to a kind of flowmeter with protective cover.
Background technology
Flowmeter, the instantaneous delivery and cumulative volume total amount of liquid are measured, liquid quantitative can also be controlled, be widely used in
The industries such as industrial and mineral, oil, chemical industry, metallurgy, electric field, when in use, the measurement mostly directly flowed into and out by liquid, mesh
Preceding water quality is poor, and the hardness of water is higher, easily forms dirt, and can also have some metal dusts, convection current sometimes
Scale forms a kind of very big threat, and usually because damaging the reason for water quality, service life is short, and flowmeter needs often
Outdoor wait works under environment, and the water body such as rainwater, steam can cause certain damage to flowmeter, and research and development one kind can overcome above-mentioned lack
Sunken flowmeter turns into those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
The technical problems to be solved by the invention are the shortcomings that overcoming prior art, there is provided a kind of stream with protective cover
Scale, it is simple and compact for structure, there is good water resistance, easy installation and removal, service life length.
In order to solve the above technical problems, the present invention provides a kind of flowmeter with protective cover, including flow meter head with
Flowtube, flowtube are hollow tubular structure, and flowtube is made up of feed tube and drain pipe connection, and flow meter head is located at the stream
The middle part of buret length direction, flow meter head are also arranged with protective cover outside, wherein：
Protective cover includes shield body, the guiding gutter and adapter being arranged in shield body, and shield body is by five pieces
Sheet material is combined, and an at least side board material for shield body is movably connected in shield body, and the two of shield body
The mouth of pipe stretched into for feed tube and drain pipe is had on side, is provided with the upper end of shield body and front and rear sheet material transparent
Observation window, also uniform several through holes on front and rear sheet material；
Surrounding of the guiding gutter along shield body top is set, and is provided with adapter between guiding gutter, guiding gutter is existed by adapter
Shield body top surrounds the entirety of a square structure, and guiding gutter includes aqua storage tank and baffle plate forms, and baffle plate is flexibly connected
In the side of guiding gutter, the both ends evagination of aqua storage tank forms projection, and adapter is arcuate structure, and the both ends of adapter are recessed
Groove, projection are adapted with groove, and water-guiding hole is also provided with adapter.
The technical scheme that further limits of the present invention as：
In the foregoing flowmeter with protective cover, aqua storage tank is U-shaped structure.
Technique effect, the aqua storage tank of U-shaped structure of the present invention, it can be stored well relative to trapezium structure, rectangular row structure
Rainwater and reduce frictional force when rainwater circulates, circulation is more smooth, is advantageous to the timely discharge of rainwater.
In the foregoing flowmeter with protective cover, also interference fit has aqueduct in water-guiding hole, and the bottom of aqueduct is also
It is connected with plastic flexible pipe.
Aqueduct is equipped with the water-guiding hole of guiding gutter of the present invention, water flows into aqueduct along conduit pipe from water-guiding hole,
Water is drained into the position of regulation discharge by the plastic flexible pipe that is connected under aqueduct again, plastic flexible pipe, which can arbitrarily be bent, have been reached
Water is drained into defined position, and also will not enter protective cover along through hole without prejudice to normal operation elsewhere, rainwater
It is interior.
In the foregoing flowmeter with protective cover, protective cover is provided with one layer of overcoat, and overcoat wraps according to the mass fraction
Include following components：
Film-forming resin：30-35 parts, black silicon carbide：20-23 parts, fine-grained alumina：25-30 parts, butadiene-styrene rubber：10-15 parts, face
Filler：7-9 parts, defoamer：3-5 parts, dispersant：5-8 parts, levelling agent：1-3 parts, suspending agent：3-5 parts, surfactant：1-3
Part, thixotropic agent：0.5-1.0 parts, silane coupler：1-4 parts, curing agent：8-10 parts, compound rare-earth：1-3 parts；
Film-forming resin is the mixture of water based acrylic resin and bromine carbon poly urethane resin composite materials, wherein in mass ratio
Count water based acrylic resin：Bromine carbon polyurethane resin 1:4；Color stuffing is composite iron-titanium powder, sepiolite, talcum powder, kaolinite
One kind in soil；Defoamer is polysiloxane-based defoamer；The hydrophobic modified carboxylic acid sodium salt of dispersant, polyacrylic acid sodium salt or ammonium
One kind in salt；Levelling agent is isophorone or DAA；Thixotropic agent is aerosil or organobentonite；Curing agent
For one kind in diethylenetriamine, m-phenylene diamine (MPD), phenol aldehyde modified amine；Surfactant is fat alcohol polyethylene ether or benzene sulfonamide
Acid or neopelex；Suspending agent is for the mixture of sodium carboxymethylcellulose and sodium bentonite and fine according to carboxymethyl
Tie up plain sodium：Sodium bentonite=1.2：1.5 weight is than mixing；
Compound rare-earth includes following components by mass percentage：Y：15-18%, Sc：9-12%, Gd：12-20%, Sm：18-20%,
Remaining La, above each component sum are 100%.
In the foregoing flowmeter with protective cover, bromine carbon poly urethane resin composite materials include with the following group according to the mass fraction
Point：
2,4 toluene diisocyanate：15-20 parts, PEG-4000：10-15 parts, trimethylolpropane：10-15 parts, tetrabromo
Bisphenol-A：20-30 parts, butyl acetate：10-12 parts, cyclohexanone：5-10 parts, aromatic polyamide chopped fiber：20-30 parts；
The preparation method of bromine carbon poly urethane resin composite materials is specific as follows：
A., PEG-4000, trimethylolpropane and cyclohexanone are added to agitating and heating in 250ml three-necked flask, three mouthfuls of burnings
Equipped with agitating device, water knockout drum agent condenser pipe on bottle, the reflux dewatering 2-3h at 130-140 DEG C；
When b. reducing temperature to 60-70 DEG C, 2,4- toluene di-isocyanate(TDI)s are added into three-necked flask, with the acetic acid fourth after dehydration
Ester is that solvent dissolves tetrabromobisphenol A at 30-35 DEG C to obtain tetrabromobisphenol A solution, and tetrabromobisphenol A solution is added into three mouthfuls of burnings
In bottle, di-n-butyltin dilaurate is added dropwise into three-necked flask, agitating and heating reacts 20-30min at 70-75 DEG C；
C. reaction naturally cools to room temperature after terminating, and the raw material after being dehydrated in step a is added in three-necked flask, and add two
Di-n-butyltin dilaurate, 15-20min is reacted at 60-65 DEG C, be cooled to room temperature discharging, obtain bromine carbon base polyurethane prepolymer for use as；
D. the base polyurethane prepolymer for use as being prepared is mixed into aromatic polyamide chopped fiber, and be well mixed, then add 2,4-
Toluene di-isocyanate(TDI) is well mixed again, and the mixture of fiber and performed polymer is coated in model groove, the pre- sulphur at 75 DEG C
It is standby after change 1-3h；
E. mould, and the coating polyethylene wax in mould are cleared up, and mould is preheated to 70-80 DEG C, by the fiber after presulfurization
Placed in a mold with pre-polymer mixture, matched moulds, temperature is risen to 125-140 DEG C, solidification, treats that mould naturally cools to room temperature
When, the demoulding obtains bromine carbon polyurethane material.
In the foregoing flowmeter with protective cover, the preparation method of overcoat specifically includes following steps：
（1）The pure water that protective cover surface is first 40-45 DEG C with temperature is cleaned, then dried up, drying temperature is 60-70 DEG C,
Then room temperature is naturally cooled to, rubber surface is cleaned into 1-3 times with fat hydrocarbon solvent in dried protective cover surface, used again
The pure water that temperature is 50 DEG C rinses, and last blower fan drying is stand-by；
（2）Protection coating is prepared, protection coating specifically includes operation：
Film-forming resin, butadiene-styrene rubber are added into homogenizer high speed and disperse 15-20min, mixing speed 500-800r/
Min, mixing speed is reduced, color stuffing is added under 300-400r/min, half measures defoamer, levelling agent, compound rare-earth, dispersant
And thixotropic agent, after it is well mixed, color stuffing is repeatedly added portionwise on a small quantity, color stuffing is added and improves rotating speed to 800-
900r/min, its high speed is set to disperse 30-40min, after disperseing, gradual polishing remaining half under 200-300r/min low speed
Defoamer, levelling agent, compound rare-earth, dispersant and thixotropic agent are measured, black silicon carbide, fine grain oxidation are added after stirring at low speed is uniform
Aluminium, suspending agent and surfactant, to can obtain overcoat coating standby for filtering after stirring；
（3）With fine sandpaper by the slight feather plucking of protective cover, then surface is wiped 1-3 times with fat hydrocarbon solvent；
（4）By step（2）The protection coating distilled water diluting prepared is to 18-19s, with the strainer filtering of 100-120 mesh,
Silane coupler is well mixed with curing agent simultaneously and mixed again with coating obtained above, the table coated in protective cover
Face, applied in two coats, each interval 24-30h, at room temperature solidification obtain overcoat；
Spraying is carried out in 1.0-1.2mm spray gun using bore during coating and forms finished product, atomizing pressure is controlled in 100-320kPa,
Environmental Kuznets Curves are coated in 15-25 DEG C of temperature, relative humidity≤50%；
（5）Protective cover provided with overcoat is cooled down, after being cooled to room temperature, examined, storage；
Cooling specially first uses water to be cooled to 100-120 DEG C with 7 DEG C/s speed, is then air-cooled to 80-90 DEG C, then using water
It is cooled to 50-70 DEG C with 3 DEG C/s cooling velocity, is finally air-cooled to room temperature.
The beneficial effects of the invention are as follows：
The side of the guiding gutter of the present invention is provided with baffle plate, due to being to be flexibly connected, the angle of energy controllable register and guiding gutter, and root
Factually the rainfall on border and air quantity come the position of timely controllable register and guiding gutter in the hope of reaching optimal rainproof effect, the rain for being
Water is fallen into rain cover guiding gutter as far as possible, will not spill guiding gutter because wind-force or rainfall are too big, pair is set into equipment
It is standby to affect；
Be not between guiding gutter of the present invention be directly connected to but connected by adapter, adapter is provided with water-guiding hole, makes
Obtaining rainwater, more smoothly timely drainage is gone out, and outflow velocity is fast, and the drainage time is short, will not produce ponding or because rainfall is too big
Phenomena such as can not discharging in time, it ensure that the normal operation of guiding gutter；
The present invention assembles, simple in construction, convenient disassembly, is installed on the top of flowmeter, is beaten in rainwater when on protective cover,
Rainwater following current enters in guiding gutter, and by guiding gutter, by water, the safe water conservancy diversion when that will not encroach on equipment in protective cover is gone out, and reduces
To equipment suitable bad, the service life of equipment is extended, reduces the cost of maintenance.
Dispersant is with the addition of in the protection layer component of the present invention, dispersant can increase the compatibility between base-material, can anti-tablet
Son wadding is poly-, reduces paint viscosity, is firmly adsorbed on the surface of dispersed particle, and provides good space repulsion, makes particle
After fully dispersed under high velocity agitation, it will not reunite again because of Van der Waals force, adsorption layer will not also act on by external force
When from particle surface peel off and cause the unstable of system, so as to optimize the physics of coating and chemical property；
The compound rare-earth of the present invention, because the metallic atomic radius of above rare earth element is big and rare earth has higher activity, very
The space of storeroom is easily filled up, meanwhile, rare earth element is easily and the element compounds such as oxygen, sulphur generate the high compound of fusing point, compound
The addition of rare earth improves the dispersiveness and compatibility that prepare coating to a certain extent, product mix is uniformly also improved painting
The anti-flammability of material.
Fine-grained alumina is used in the present invention, fine-grained alumina is a kind of Ultramicro-powder, can improve the compactness of coating, is assigned
In the very high sintered material hardness of coating, the fillibility of coating can be strengthened, improve application property, so that the mobility increase of coating.
Overcoat paint adhesion is stronger difficult for drop-off in the present invention, have excellent high temperature resistant, abrasion resistance properties it is same
When also both there is the premium properties such as good hardness, high thermal stability, ductility and machinability, the preparation method of the coating
Simply, cost is cheap, by the surface enhanced wearability of valve of the coating coated in valve, extends its service life.
The present invention matches suitable protective cover to flowmeter, and existing flowmeter is mostly directly installed on outdoor or one
In relatively loose cavity, outward appearance seems that comparison is mixed and disorderly, and is easier to be destroyed, and protective cover can be very good
Flowmeter is protected, and the injury that external environment is brought can be stopped, increases the service life, reduces cost.
After working life refers to that the base-material of coating and curing agent are well mixed, it is suitable for the maximum duration of construction, more than this
Because chemically reacting after time, paint viscosity retrogradation simultaneously starts gel, now can not also be used even if addition diluent, with
The rise of construction temperature, the working life of coating gradually shortens, because being raised with temperature, reaction speed is accelerated, i.e. working life
Correspondingly shorten, the suitable environment temperature of considered critical of the present invention is 15~25 DEG C, it is ensured that the length of working life, is extended
Engineering time, ensure that everything goes well with your work and complete.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation of shield body in the embodiment of the present invention；
Fig. 3 is Fig. 2 overlooking the structure diagram；
Fig. 4 is the structural representation of aqua storage tank in Fig. 2；
1- flow meter heads, 2- feed tubes, 3- drain pipes, 4- shield bodies, 5- aqua storage tanks, 6- adapters, 7- transparent windows,
8- through holes.
Embodiment
Embodiment 1
A kind of flowmeter with protective cover that the present embodiment provides, structure as Figure 1-4, including flow meter head 1 and flow
Pipe, flowtube are hollow tubular structure, and flowtube is made up of feed tube 2 and the connection of drain pipe 3, and flow meter head 1 is located at the stream
The middle part of buret length direction, flow meter head 1 are also arranged with protective cover outside, wherein：
Protective cover includes shield body 4, the guiding gutter and adapter 6 that are arranged in shield body 4, shield body 4 by
Five blocks of sheet materials are combined, and an at least side board material for shield body 4 is movably connected in shield body 4, protective cover sheet
The mouth of pipe stretched into for feed tube 2 and drain pipe 3, shield body are had on two sides of body 4（4）Upper end and front and rear panel
Transparent windows 7 are provided with material, uniform several through holes 8 are gone back on front and rear sheet material；
Surrounding of the guiding gutter along the top of shield body 4 is set, and is provided with adapter 6 between guiding gutter, guiding gutter passes through adapter 6
The entirety of a square structure is surrounded on the top of shield body 4, guiding gutter includes aqua storage tank 5 and baffle plate 7 forms, aqua storage tank 5
For U-shaped structure, baffle plate 7 is movably connected in the side of guiding gutter, and the both ends evagination of aqua storage tank 5 forms projection, and adapter 6 is arc
Structure, the both ends of adapter 6 are recessed groove, and projection is adapted with groove, and water-guiding hole, water-guiding hole are also provided with adapter 6
Inside also interference fit has aqueduct, and the bottom of aqueduct is also associated with plastic flexible pipe.
Embodiment 2
The present embodiment provides protective cover in the flowmeter in embodiment 1 with protective cover and is provided with one layer of overcoat, and overcoat is pressed
Mass fraction meter includes following components：
Film-forming resin：30 parts, black silicon carbide：20 parts, fine-grained alumina：25 parts, butadiene-styrene rubber：10 parts, color stuffing：7 parts, defoaming
Agent：3 parts, dispersant：5 parts, levelling agent：1 part, suspending agent：3 parts, surfactant：1 part, thixotropic agent：It is 0.5 part, silane coupled
Agent：1 part, curing agent：8 parts, compound rare-earth：1 part；
Film-forming resin is the mixture of water based acrylic resin and bromine carbon poly urethane resin composite materials, wherein in mass ratio
Count water based acrylic resin：Bromine carbon polyurethane resin 1:4；Color stuffing is composite iron-titanium powder；Defoamer is polysiloxane-based
Defoamer；The hydrophobic modified carboxylic acid sodium salt of dispersant；Levelling agent is isophorone；Thixotropic agent is aerosil；Curing agent
For diethylenetriamine；Surfactant is fat alcohol polyethylene ether；Suspending agent is sodium carboxymethylcellulose and sodium bentonite
Mixture and according to sodium carboxymethylcellulose：Sodium bentonite=1.2：1.5 weight is than mixing；
Compound rare-earth includes following components by mass percentage：Y：15%, Sc：9%, Gd：12%, Sm：18%, remaining La, the above
Each component sum is 100%.
Above-mentioned bromine carbon poly urethane resin composite materials include following components according to the mass fraction：
2,4 toluene diisocyanate：15 parts, PEG-4000：10 parts, trimethylolpropane：10 parts, tetrabromobisphenol A：20
Part, butyl acetate：10 parts, cyclohexanone：5 parts, aromatic polyamide chopped fiber：20 parts；
The preparation method of bromine carbon poly urethane resin composite materials is specific as follows：
A., PEG-4000, trimethylolpropane and cyclohexanone are added to agitating and heating in 250ml three-necked flask, three mouthfuls of burnings
Equipped with agitating device, water knockout drum agent condenser pipe on bottle, the reflux dewatering 2h at 130 DEG C；
When b. reducing temperature to 60 DEG C, 2,4- toluene di-isocyanate(TDI)s are added into three-necked flask, with the butyl acetate after dehydration
At 30 DEG C tetrabromobisphenol A is dissolved to obtain tetrabromobisphenol A solution for solvent, tetrabromobisphenol A solution is added in three-necked flask,
Di-n-butyltin dilaurate is added dropwise into three-necked flask, agitating and heating reacts 20min at 70 DEG C；
C. reaction naturally cools to room temperature after terminating, and the raw material after being dehydrated in step a is added in three-necked flask, and add two
Di-n-butyltin dilaurate, 15min is reacted at 60 DEG C, be cooled to room temperature discharging, obtain bromine carbon base polyurethane prepolymer for use as；
D. the base polyurethane prepolymer for use as being prepared is mixed into aromatic polyamide chopped fiber, and be well mixed, then add 2,4-
Toluene di-isocyanate(TDI) is well mixed again, and the mixture of fiber and performed polymer is coated in model groove, the pre- sulphur at 75 DEG C
It is standby after change 1h；
E. mould, and the coating polyethylene wax in mould are cleared up, and mould is preheated to 70 DEG C, by the fiber after presulfurization and in advance
Aggressiveness mixture is placed in a mold, matched moulds, and temperature is risen into 125 DEG C, solidification, when mould naturally cools to room temperature, is stripped
Obtain bromine carbon polyurethane material.
The preparation method of above-mentioned overcoat specifically includes following steps：
（1）Protective cover surface is first cleaned with the pure water that temperature is 40 DEG C, then dried up, drying temperature is 60 DEG C, then certainly
Room temperature so is cooled to, rubber surface is cleaned into 1 time in dried protective cover surface with fat hydrocarbon solvent, is again 50 with temperature
DEG C pure water rinse, the drying of last blower fan is stand-by；
（2）Protection coating is prepared, protection coating specifically includes operation：
Film-forming resin, butadiene-styrene rubber are added into homogenizer high speed and disperse 15min, mixing speed 500r/min, is reduced
Mixing speed, color stuffing is added under 300r/min, half measures defoamer, levelling agent, compound rare-earth, dispersant and thixotropic agent, treats
After it is well mixed, color stuffing is repeatedly added portionwise on a small quantity, color stuffing is added and improves rotating speed to 800r/min, make its high speed point
Dissipate 30min, after disperseing, under 200r/min low speed gradual polishing remaining half measure defoamer, levelling agent, compound rare-earth,
Dispersant and thixotropic agent, black silicon carbide, fine-grained alumina, suspending agent and surfactant are added after stirring at low speed is uniform, is stirred
It is standby to can obtain overcoat coating for filtering after mixing uniformly；
（3）With fine sandpaper by the slight feather plucking of protective cover, then surface is wiped 1 time with fat hydrocarbon solvent；
（4）By step（2）The protection coating distilled water diluting prepared, with the strainer filtering of 100 mesh, simultaneously will to 18s
Silane coupler is well mixed with curing agent to be mixed with coating obtained above again, the surface coated in protective cover, coating
Two layers, each interval 24h, solidification at room temperature obtains overcoat；
Spraying is carried out in 1.0mm spray gun using bore during coating and forms finished product, atomizing pressure control is in 100kPa, coating environment
Control is in 15 DEG C of temperature, relative humidity≤50%；
（5）Protective cover provided with overcoat is cooled down, after being cooled to room temperature, examined, storage；
Cooling specially first uses water to be cooled to 100 DEG C with 7 DEG C/s speed, is then air-cooled to 80 DEG C, then use water with 3 DEG C/s
Cooling velocity be cooled to 50 DEG C, be finally air-cooled to room temperature.
Embodiment 3
The present embodiment provides protective cover in the flowmeter in embodiment 1 with protective cover and is provided with one layer of overcoat, and overcoat is pressed
Mass fraction meter includes following components：
Film-forming resin：35 parts, black silicon carbide：23 parts, fine-grained alumina：30 parts, butadiene-styrene rubber：15 parts, color stuffing：9 parts, defoaming
Agent：5 parts, dispersant：8 parts, levelling agent：3 parts, suspending agent：5 parts, surfactant：3 parts, thixotropic agent：It is 1.0 parts, silane coupled
Agent：4 parts, curing agent：10 parts, compound rare-earth：3 parts；
Film-forming resin is the mixture of water based acrylic resin and bromine carbon poly urethane resin composite materials, wherein in mass ratio
Count water based acrylic resin：Bromine carbon polyurethane resin 1:4；Color stuffing is sepiolite；Defoamer is polysiloxane-based defoaming
Agent；Dispersant polyacrylic acid sodium salt；Levelling agent is DAA；Thixotropic agent is organobentonite；Curing agent is m-phenylene diamine (MPD)；Table
Face activating agent is alkyl benzene sulphonate；Suspending agent is for the mixture of sodium carboxymethylcellulose and sodium bentonite and fine according to carboxymethyl
Tie up plain sodium：Sodium bentonite=1.2：1.5 weight is than mixing；
Compound rare-earth includes following components by mass percentage：Y：18%, Sc：12%, Gd：20%, Sm：20%, remaining La, the above
Each component sum is 100%.
Above-mentioned bromine carbon poly urethane resin composite materials include following components according to the mass fraction：
2,4 toluene diisocyanate：20 parts, PEG-4000：15 parts, trimethylolpropane：15 parts, tetrabromobisphenol A：30
Part, butyl acetate：12 parts, cyclohexanone：10 parts, aromatic polyamide chopped fiber：30 parts；
The preparation method of bromine carbon poly urethane resin composite materials is specific as follows：
A., PEG-4000, trimethylolpropane and cyclohexanone are added to agitating and heating in 250ml three-necked flask, three mouthfuls of burnings
Equipped with agitating device, water knockout drum agent condenser pipe on bottle, the reflux dewatering 3h at 140 DEG C；
When b. reducing temperature to 70 DEG C, 2,4- toluene di-isocyanate(TDI)s are added into three-necked flask, with the butyl acetate after dehydration
At 35 DEG C tetrabromobisphenol A is dissolved to obtain tetrabromobisphenol A solution for solvent, tetrabromobisphenol A solution is added in three-necked flask,
Di-n-butyltin dilaurate is added dropwise into three-necked flask, agitating and heating reacts 30min at 75 DEG C；
C. reaction naturally cools to room temperature after terminating, and the raw material after being dehydrated in step a is added in three-necked flask, and add two
Di-n-butyltin dilaurate, 20min is reacted at 60-65 DEG C, be cooled to room temperature discharging, obtain bromine carbon base polyurethane prepolymer for use as；
D. the base polyurethane prepolymer for use as being prepared is mixed into aromatic polyamide chopped fiber, and be well mixed, then add 2,4-
Toluene di-isocyanate(TDI) is well mixed again, and the mixture of fiber and performed polymer is coated in model groove, the pre- sulphur at 75 DEG C
It is standby after change 3h；
E. mould, and the coating polyethylene wax in mould are cleared up, and mould is preheated to 80 DEG C, by the fiber after presulfurization and in advance
Aggressiveness mixture is placed in a mold, matched moulds, and temperature is risen into 140 DEG C, solidification, when mould naturally cools to room temperature, is stripped
Obtain bromine carbon polyurethane material.
The preparation method of above-mentioned overcoat specifically includes following steps：
（1）Protective cover surface is first cleaned with the pure water that temperature is 45 DEG C, then dried up, drying temperature is 70 DEG C, then certainly
Room temperature so is cooled to, rubber surface is cleaned into 3 times in dried protective cover surface with fat hydrocarbon solvent, is again 50 with temperature
DEG C pure water rinse, the drying of last blower fan is stand-by；
（2）Protection coating is prepared, protection coating specifically includes operation：
Film-forming resin, butadiene-styrene rubber are added into homogenizer high speed and disperse 20min, mixing speed 800r/min, is reduced
Mixing speed, color stuffing is added under 400r/min, half measures defoamer, levelling agent, compound rare-earth, dispersant and thixotropic agent, treats
After it is well mixed, color stuffing is repeatedly added portionwise on a small quantity, color stuffing is added and improves rotating speed to 900r/min, make its high speed point
Dissipate 40min, after disperseing, under 300r/min low speed gradual polishing remaining half measure defoamer, levelling agent, compound rare-earth,
Dispersant and thixotropic agent, black silicon carbide, fine-grained alumina, suspending agent and surfactant are added after stirring at low speed is uniform, is stirred
It is standby to can obtain overcoat coating for filtering after mixing uniformly；
（3）With fine sandpaper by the slight feather plucking of protective cover, then surface is wiped 3 times with fat hydrocarbon solvent；
（4）By step（2）The protection coating distilled water diluting prepared, with the strainer filtering of 120 mesh, simultaneously will to 19s
Silane coupler is well mixed with curing agent to be mixed with coating obtained above again, the surface coated in protective cover, coating
Two layers, each interval 30h, solidification at room temperature obtains overcoat；
Spraying is carried out in 1.2mm spray gun using bore during coating and forms finished product, atomizing pressure control is in 320kPa, coating environment
Control is in 25 DEG C of temperature, relative humidity≤50%；
（5）Protective cover provided with overcoat is cooled down, after being cooled to room temperature, examined, storage；
Cooling specially first uses water to be cooled to 120 DEG C with 7 DEG C/s speed, is then air-cooled to 90 DEG C, then use water with 3 DEG C/s
Cooling velocity be cooled to 70 DEG C, be finally air-cooled to room temperature.
Embodiment 4
The present embodiment provides protective cover in the flowmeter in embodiment 1 with protective cover and is provided with one layer of overcoat, and overcoat is pressed
Mass fraction meter includes following components：
Film-forming resin：32 parts, black silicon carbide：21 parts, fine-grained alumina：28 parts, butadiene-styrene rubber：13 parts, color stuffing：8 parts, defoaming
Agent：4 parts, dispersant：7 parts, levelling agent：2 parts, suspending agent：4 parts, surfactant：2 parts, thixotropic agent：It is 0.8 part, silane coupled
Agent：3 parts, curing agent：9 parts, compound rare-earth：2 parts；
Film-forming resin is the mixture of water based acrylic resin and bromine carbon poly urethane resin composite materials, wherein in mass ratio
Count water based acrylic resin：Bromine carbon polyurethane resin 1:4；Color stuffing is talcum powder；Defoamer is polysiloxane-based defoaming
Agent；Dispersant ammonium salt；Levelling agent is isophorone；Thixotropic agent is aerosil；Curing agent is phenol aldehyde modified amine；Live on surface
Property agent is neopelex；Suspending agent is for the mixture of sodium carboxymethylcellulose and sodium bentonite and according to carboxymethyl
Sodium cellulosate：Sodium bentonite=1.2：1.5 weight is than mixing；
Compound rare-earth includes following components by mass percentage：Y：17%, Sc：11%, Gd：15%, Sm：19%, remaining La, the above
Each component sum is 100%.
Above-mentioned bromine carbon poly urethane resin composite materials include following components according to the mass fraction：
2,4 toluene diisocyanate：18 parts, PEG-4000：13 parts, trimethylolpropane：12 parts, tetrabromobisphenol A：25
Part, butyl acetate：11 parts, cyclohexanone：8 parts, aromatic polyamide chopped fiber：25 parts；
The preparation method of bromine carbon poly urethane resin composite materials is specific as follows：
A., PEG-4000, trimethylolpropane and cyclohexanone are added to agitating and heating in 250ml three-necked flask, three mouthfuls of burnings
Equipped with agitating device, water knockout drum agent condenser pipe on bottle, the reflux dewatering 2.5h at 135 DEG C；
When b. reducing temperature to 65 DEG C, 2,4- toluene di-isocyanate(TDI)s are added into three-necked flask, with the butyl acetate after dehydration
At 32 DEG C tetrabromobisphenol A is dissolved to obtain tetrabromobisphenol A solution for solvent, tetrabromobisphenol A solution is added in three-necked flask,
Di-n-butyltin dilaurate is added dropwise into three-necked flask, agitating and heating reacts 25min at 73 DEG C；
C. reaction naturally cools to room temperature after terminating, and the raw material after being dehydrated in step a is added in three-necked flask, and add two
Di-n-butyltin dilaurate, 18min is reacted at 63 DEG C, be cooled to room temperature discharging, obtain bromine carbon base polyurethane prepolymer for use as；
D. the base polyurethane prepolymer for use as being prepared is mixed into aromatic polyamide chopped fiber, and be well mixed, then add 2,4-
Toluene di-isocyanate(TDI) is well mixed again, and the mixture of fiber and performed polymer is coated in model groove, the pre- sulphur at 75 DEG C
It is standby after change 2h；
E. mould, and the coating polyethylene wax in mould are cleared up, and mould is preheated to 75 DEG C, by the fiber after presulfurization and in advance
Aggressiveness mixture is placed in a mold, matched moulds, and temperature is risen into 129 DEG C, solidification, when mould naturally cools to room temperature, is stripped
Obtain bromine carbon polyurethane material.
The preparation method of above-mentioned overcoat specifically includes following steps：
（1）Protective cover surface is first cleaned with the pure water that temperature is 43 DEG C, then dried up, drying temperature is 65 DEG C, then certainly
Room temperature so is cooled to, rubber surface is cleaned into 2 times in dried protective cover surface with fat hydrocarbon solvent, is again 50 with temperature
DEG C pure water rinse, the drying of last blower fan is stand-by；
（2）Protection coating is prepared, protection coating specifically includes operation：
Film-forming resin, butadiene-styrene rubber are added into homogenizer high speed and disperse 18min, mixing speed 600r/min, is reduced
Mixing speed, color stuffing is added under 350r/min, half measures defoamer, levelling agent, compound rare-earth, dispersant and thixotropic agent, treats
After it is well mixed, color stuffing is repeatedly added portionwise on a small quantity, color stuffing is added and improves rotating speed to 850r/min, make its high speed point
Dissipate 35min, after disperseing, under 250r/min low speed gradual polishing remaining half measure defoamer, levelling agent, compound rare-earth,
Dispersant and thixotropic agent, black silicon carbide, fine-grained alumina, suspending agent and surfactant are added after stirring at low speed is uniform, is stirred
It is standby to can obtain overcoat coating for filtering after mixing uniformly；
（3）With fine sandpaper by the slight feather plucking of protective cover, then surface is wiped 2 times with fat hydrocarbon solvent；
（4）By step（2）The protection coating distilled water diluting prepared, with the strainer filtering of 110 mesh, simultaneously will to 18s
Silane coupler is well mixed with curing agent to be mixed with coating obtained above again, the surface coated in protective cover, coating
Two layers, each interval 28h, solidification at room temperature obtains overcoat；
Spraying is carried out in 1.1mm spray gun using bore during coating and forms finished product, atomizing pressure control is in 220kPa, coating environment
Control is in 19 DEG C of temperature, relative humidity≤50%；
（5）Protective cover provided with overcoat is cooled down, after being cooled to room temperature, examined, storage；
Cooling specially first uses water to be cooled to 110 DEG C with 7 DEG C/s speed, is then air-cooled to 85 DEG C, then use water with 3 DEG C/s
Cooling velocity be cooled to 60 DEG C, be finally air-cooled to room temperature.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (6)
1. a kind of flowmeter with protective cover, including flow meter head（1）And flowtube, the flowtube are hollow tubulose knot
Structure, the flowtube is by feed tube（2）And drain pipe（3）Connection composition, the flow meter head（1）Positioned at the flow length of tube side
To middle part, it is characterised in that：The flow meter head（1）Protective cover is also arranged with outside, wherein：
Described protective cover includes shield body（4）, be arranged on shield body（4）On guiding gutter and adapter（6）, institute
State shield body（4）Combined by five blocks of sheet materials, the shield body（4）An at least side board material be movably connected in
Shield body（4）On, the shield body（4）Two sides on have for feed tube（2）And drain pipe（3）Stretch into
The mouth of pipe, the shield body（4）Upper end and front and rear sheet material on be provided with transparent windows（7）, on the front and rear sheet material also
Uniform several through holes（8）；
The guiding gutter is along the shield body（4）The surrounding on top is set, and the adapter is provided between the guiding gutter
（6）, the guiding gutter passes through the adapter（6）In shield body（4）Top surrounds the entirety of a square structure, described
Guiding gutter includes aqua storage tank（5）And baffle plate（7）Composition, the baffle plate（7）It is movably connected in the side of the guiding gutter, the storage
Tank（5）Both ends evaginations form projection, the adapter（6）For arcuate structure, the adapter（6）Both ends be recessed
Groove, the projection are adapted with the groove, the adapter（6）On be also provided with water-guiding hole.
2. the flowmeter according to claim 1 with protective cover, it is characterised in that：The aqua storage tank（5）For U-shaped knot
Structure.
3. the flowmeter according to claim 1 with protective cover, it is characterised in that：Also it is interference fitted in the water-guiding hole
There is aqueduct, the bottom of the aqueduct is also associated with plastic flexible pipe.
4. the flowmeter according to claim 1 with protective cover, it is characterised in that：The protective cover, which is provided with one layer, to be prevented
Sheath, described overcoat include following components according to the mass fraction：
Film-forming resin：30-35 parts, black silicon carbide：20-23 parts, fine-grained alumina：25-30 parts, butadiene-styrene rubber：10-15 parts, face
Filler：7-9 parts, defoamer：3-5 parts, dispersant：5-8 parts, levelling agent：1-3 parts, suspending agent：3-5 parts, surfactant：1-3
Part, thixotropic agent：0.5-1.0 parts, silane coupler：1-4 parts, curing agent：8-10 parts, compound rare-earth：1-3 parts；
The film-forming resin is the mixture of water based acrylic resin and bromine carbon poly urethane resin composite materials, wherein by matter
Amount is than meter water based acrylic resin：Bromine carbon polyurethane resin 1:4；Described color stuffing is composite iron-titanium powder, sepiolite, cunning
One kind in stone flour, kaolin；Described defoamer is polysiloxane-based defoamer；The hydrophobic modified carboxylic acid of described dispersant
One kind in sodium salt, polyacrylic acid sodium salt or ammonium salt；Described levelling agent is isophorone or DAA；Described thixotropic agent
For aerosil or organobentonite；Described curing agent is one in diethylenetriamine, m-phenylene diamine (MPD), phenol aldehyde modified amine
Kind；Described surfactant is fat alcohol polyethylene ether or alkyl benzene sulphonate or neopelex；Described suspension
Agent is for the mixture of sodium carboxymethylcellulose and sodium bentonite and according to sodium carboxymethylcellulose：Sodium bentonite=1.2：1.5
Weight than mixing；
Described compound rare-earth includes following components by mass percentage：Y：15-18%, Sc：9-12%, Gd：12-20%, Sm：
18-20%, remaining La, above each component sum are 100%.
5. the flowmeter according to claim 4 with protective cover, it is characterised in that：Described bromine carbon polyurethane resin is answered
Condensation material includes following components according to the mass fraction：
2,4 toluene diisocyanate：15-20 parts, PEG-4000：10-15 parts, trimethylolpropane：10-15 parts, tetrabromo
Bisphenol-A：20-30 parts, butyl acetate：10-12 parts, cyclohexanone：5-10 parts, aromatic polyamide chopped fiber：20-30 parts；
The preparation method of the bromine carbon poly urethane resin composite materials is specific as follows：
A., PEG-4000, trimethylolpropane and cyclohexanone are added to agitating and heating in 250ml three-necked flask, it is described
Equipped with agitating device, water knockout drum agent condenser pipe on three-necked flask, the reflux dewatering 2-3h at 130-140 DEG C；
When b. reducing temperature to 60-70 DEG C, 2,4- toluene di-isocyanate(TDI)s are added into three-necked flask, with the acetic acid fourth after dehydration
Ester is that solvent dissolves tetrabromobisphenol A at 30-35 DEG C to obtain tetrabromobisphenol A solution, and tetrabromobisphenol A solution is added into three mouthfuls of burnings
In bottle, di-n-butyltin dilaurate is added dropwise into three-necked flask, agitating and heating reacts 20-30min at 70-75 DEG C；
C. reaction naturally cools to room temperature after terminating, and the raw material after being dehydrated in step a is added in three-necked flask, and add two
Di-n-butyltin dilaurate, 15-20min is reacted at 60-65 DEG C, be cooled to room temperature discharging, obtain bromine carbon base polyurethane prepolymer for use as；
D. the base polyurethane prepolymer for use as being prepared is mixed into aromatic polyamide chopped fiber, and be well mixed, then add 2,4-
Toluene di-isocyanate(TDI) is well mixed again, and the mixture of fiber and performed polymer is coated in model groove, the pre- sulphur at 75 DEG C
It is standby after change 1-3h；
E. mould, and the coating polyethylene wax in mould are cleared up, and mould is preheated to 70-80 DEG C, by the fiber after presulfurization
Placed in a mold with pre-polymer mixture, matched moulds, temperature is risen to 125-140 DEG C, solidification, treats that mould naturally cools to room temperature
When, the demoulding obtains bromine carbon polyurethane material.
6. the flowmeter according to claim 4 with protective cover, it is characterised in that：The preparation method tool of the overcoat
Body comprises the following steps：
（1）The pure water that protective cover surface is first 40-45 DEG C with temperature is cleaned, then dried up, drying temperature is 60-70 DEG C,
Then room temperature is naturally cooled to, rubber surface is cleaned into 1-3 times with fat hydrocarbon solvent in dried protective cover surface, used again
The pure water that temperature is 50 DEG C rinses, and last blower fan drying is stand-by；
（2）Protection coating is prepared, the protection coating specifically includes operation：
Film-forming resin, butadiene-styrene rubber are added into homogenizer high speed and disperse 15-20min, mixing speed 500-800r/
Min, mixing speed is reduced, color stuffing is added under 300-400r/min, half measures defoamer, levelling agent, compound rare-earth, dispersant
And thixotropic agent, after it is well mixed, color stuffing is repeatedly added portionwise on a small quantity, color stuffing is added and improves rotating speed to 800-
900r/min, its high speed is set to disperse 30-40min, after disperseing, gradual polishing remaining half under 200-300r/min low speed
Defoamer, levelling agent, compound rare-earth, dispersant and thixotropic agent are measured, black silicon carbide, fine grain oxidation are added after stirring at low speed is uniform
Aluminium, suspending agent and surfactant, to can obtain overcoat coating standby for filtering after stirring；
（3）With fine sandpaper by the slight feather plucking of protective cover, then surface is wiped 1-3 times with fat hydrocarbon solvent；
（4）By step（2）The protection coating distilled water diluting prepared is to 18-19s, with the strainer filtering of 100-120 mesh,
Silane coupler is well mixed with curing agent simultaneously and mixed again with coating obtained above, the table coated in protective cover
Face, applied in two coats, each interval 24-30h, at room temperature solidification obtain overcoat；
Spraying is carried out in 1.0-1.2mm spray gun using bore during coating and forms finished product, atomizing pressure is controlled in 100-320kPa,
Environmental Kuznets Curves are coated in 15-25 DEG C of temperature, relative humidity≤50%；
（5）Protective cover provided with overcoat is cooled down, after being cooled to room temperature, examined, storage；
Described cooling specially first uses water to be cooled to 100-120 DEG C with 7 DEG C/s speed, is then air-cooled to 80-90 DEG C, then
Use water to be cooled to 50-70 DEG C with 3 DEG C/s cooling velocity, be finally air-cooled to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711279269.8A CN107796445A (en) | 2017-12-06 | 2017-12-06 | A kind of flowmeter with protective cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711279269.8A CN107796445A (en) | 2017-12-06 | 2017-12-06 | A kind of flowmeter with protective cover |
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| CN107796445A true CN107796445A (en) | 2018-03-13 |
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| CN110514261A (en) * | 2019-07-23 | 2019-11-29 | 安徽春辉仪表线缆集团有限公司 | Protective device is used in a kind of work of electromagnetic flowmeter |
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