Construction of spray paint room reachs design method

　　One, overview

Spray paint room is the room that object of spray paint of an opposite filter has spray paint. Spray paint room is to offer besmear to mount operation the equipment of special environment, exercise of outfit of can contented besmear is clean to temperature, humidity, illuminance, air degree wait for a requirement, the Qi Wu of the generation when it can work spray paint and organic waste gas are restricted and processing hind is discharged, it is environmental protection model besmear furnish equipment. What the basis handles way to Qi Wu is different, room equipment can divide spray paint to be mixed for dry type wet two kinds. Room of dry type spray paint but an organic whole of spray paint, drying saves investment. Wet efficiency of mist of lacquer of processing of spray paint room is tall, can divide again for water (oily) shade type, bath type, water type coming back.

Spray paint room is average catch market system by the room body, system sending wind, system that discharge wind, water supply, Qi Wu (Qi Ni processing system) , condole of the system that offer lacquer, workpiece hangs system, electric equipment to control a system (lighting system) wait for composition. The design parameter of room of general spray paint asks as follows:

1, illume: Bright brightness needs to achieve inside room of the lacquer that bake 800, 1000 lux, and need uses the light that approachs D65 illuminant, at the same time the wall inside the room should be dumb smooth white. The area that should use stationary to lamps and lanterns makes light source and use lamps and lanterns of clapboard general furnish when using the clapboard illume that waits for transparent material through glass and electrostatic paint division are separated, its install aperture to should take reliable sealed step, the material of clapboard is flame retardant with not easy damaged and the intensity of illumination that the deposit ply on clapboard must not affect a provision.

2, air flow: Usually to doing room of type spray paint, fan pressure head is desirable 0.7-1.0KPa, to wet spray paint room, fan pressure head is desirable 1.26-1.5KPa, the belt of working area carries wind speed to take 0.3-0.5m/s commonly.

3, filter the effect: Filter remove dust the effect achieves 98% above. The top cotton that repairs a factory to use commonly has EU5 and EU6 two model, sunlamp illuminate upside can be used inside the room when using room of the lacquer that bake, normally extremely tiny speck should be less than every square metre 5.

4, room body: Room of the lacquer that bake must be sealed, and be in in juncture not due Qi Chen’s accumulation; House system is used child the mother inserts wallboard of model of gush of type heat preservation, it is sealed, good to defend lukewarm performance of spray paint room, aluminium alloy wraps side entrance door, contain in the center of the door viewport, can observe the trends inside the room at any time; House system flank contains working door, pass in and out of convenient staff member. 5, warm up speed: The time that room of the lacquer that bake rises to be used to 60 ℃ place from 20 ℃ is L0 about, L5min, the thermometer that should notice some bake lacquer room at the same time forbids, when measuring temperature, want in order to bake the spray inside lacquer room temperature is accurate.

6, noise: Noise is not more than 75dB.

The place on put together is narrated, the design point of spray paint room is:

1, affirmatory and reasonable configuration form.

2, air of affirmatory and reasonable spray booth horizontal is average velocity of flow.

3, send wind, platoon wind the system reasonable match, make sure spray paint is indoor small pressing.

4, illume distribution is equitable.

5, of Qi Wu purify a method reasonable, cannot discharge the gas with serious pollution to atmosphere.

Should consider to eliminate when the design in addition electrostatic; Chosen lamps and lanterns, switch must explosion proof, lest be when open,produce risk. Return the relevant law laws and regulations that must accord with our country. If level of noise of environment of GB3096 city district, GB7691 besmears,hold company of industry of exercise safe practice, GBJ4 3 useless discharge safety of spray booth of tentative standard, GB14444-93 technical regulation.

2, devise a method

1, the room body of room of spray paint of system of room of spray paint room is to use a Qi Wu restriction that passes gush to be inside its limits, the direction of going from place to place that makes lacquer mist edge particular by drafting apparatus again flows to filter device undertakes handling. Room system is average by dynamic pressure room, static press the composition such as room and system of spray paint house. The wind that delivers from the system that offer wind enters dynamic pressure room, make air current and atmospheric pressure distributing even, again via dynamic pressure room filter of lower bag type is entered static pressure room. Make static press the air current of the room to distributing evener. In static press the bearing frame that there is whole between room and system of spray paint house, be in above it on the shop without spin cloth to filter layer. Wind filters through this between spray paint of layer flow direction inside evener. A side of system of spray paint house uses toughened glass window and wainscot to close, the side outside room body installs fluorescent lamp floodlight box, lamplight operates area through sealed glazing illuminate, belt of setting of the side outside operating area is shut automatically implement the door. Another side uses wainscot to close, overhaul door is set on wainscot.

2, system sending wind sends wind system to be is spray paint room operation area provides classics temperature adjustment, key the equipment of wet, filtering clean fresh air. Send wind force to depend on the size of the wind speed inside spray paint room, size of spray paint room, temperature, humidity and remove dust degree depend on the work environment that quality of exterior of the coating breed of a spray, coating asks and operates personnel. The air conditioning of model of spray paint room sends wind the system: The barrier that prevent a bird (air inlet) → sucks wind adjustment shutter → beforehand (first) filter → beforehand heater → bath paragraph the heater after reaching manger → → muffler → sends the filter after → fan → wind adjustment shutter. According to the diverse demand of the user, air conditioning sends wind system to be able to above differs paragraph of composition. Their installation is inside the makes for galvanization armor plate commonly room body of type of a passageway. Because wind force is larger, have only heat the function that warm up, because the summer drops in temperature energy consumption and investment are large, do not set commonly drop in temperature device, do not have the function that drop in temperature. Heat heat source is hot water, vapour, report, fuel, conduction oil, natural gas to wait. In northward winter, the air temperature outdoor falls – 20 ℃ the following circumstance, sucking blast tuyere to be able to install spray head of natural gas combustion, heat directly, in sand blown by wind large area is bringing blast tuyere to be able to add arenaceous filter. In south, good, sand blown by wind mixes afforest environment less the circumstance with high humidity, to save investment, can omit bath paragraph. Bath paragraph cistern, wainscot uses stainless steel board make, supply water quality is close friends. How to have commonly in the around of filter press difference plan, should change when pressing difference to reach fair value filter component. Filter component is used without spin cloth to filter material is made. General from wind is sucked outside workshop, suck blast tuyere to choose the room with arenaceous when blast little this world, a bit further from a place with a draught of platoon of spray paint room or in its wind direction upside is in, suck blast tuyere to should install gauze or barrier, in order to prevent inspiratory and avian. Pass into spray paint room to prevent the noise of fan, the air channel after fan should install muffler. Fan size reachs what times of air replacement decides its unit hour to send wind force to be times of air replacement of hour of spray booth unit and indoor bulk according to spray booth size indigestion. Lukewarm, humidity and remove dust degree depends on the work environment that quality of exterior of the breed of place spray paint, coating asks and operates personnel.

3, the system that discharge wind to room of dry type spray paint, system sending wind can accept or reject according to the requirement, basically be a basis spray environment asks and decide, but the system that discharge wind must be installed. The system that discharge wind reachs the composition such as wind canal by the fan that discharge wind. The fan that discharge wind can choose an axis to shed fan, centrifugal fan, platoon wind force is less than send wind force, it is in order to assure spray paint inside the room small pressing. The system that discharge wind uses the form of lacquer room flank or bottom convulsions more, namely of Qi Wu filter layer setting is in side wall position or it is lacquer room bottom, platoon fan must choose explosion proof fan. Discharge the choice of fan leeway: Qi Wu filters a fibre glass screen pack that uses 60mm commonly, back gives wind side to be propped up with armor plate net. To this kind of commonly used fibre glass screen pack, its press caustic finally to be controlled in 250pa< normally, again the edge Cheng obstruction of the road mixes together with ventiduct local resistance, the whole system that discharge wind and lacquer mist filter the total wind block of the layer is in 400~500pa limits less than. Discharge the choice of fan wind force: Because do room of type spray paint to choose manual spray paint more, wind speed of the section that discharge wind asks to be 0.5~0.6m/s, intensity of illumination is 400-500lx. Platoon wind force: Q= ∑ (in SixVi) type: Q — , the platoon wind force of need, m3/s Vi= — , wind speed of the section that discharge wind, m3/s; Si= — , area of the section that discharge wind, m2. Can see from this, the place of system of wind of platoon of room of dry type spray paint requires wind force bigger, and wind pressure is lesser, the to Qi Wu control when because this should make sure a wind force is enough only,can satisfying production basically greatly asks. ]

4, Qi Wu catchs mist of market system paint to catch market system cent to be mixed for dry type wet two kinds big. Qi Wu doing type catchs market system to use screen pack to undertake catching market to Qi Wu, mesh filter also is called catch implement, its structure is secure the mesh that fibre glass or paper fiber make in frame two sides, become mat state. Filter double mesh is different, the eye number of inspiratory face is larger. The characteristic of mesh filter is can catch collect to contain agglutinant coating grain not only, and also can catch collect to lose agglutinant coating grain. Increase as what the Qi Wu that catch market measures, the Kongmuhui of mesh by block, the influence filters the effect, need to change at this moment new network, the mesh burn-up that loses action is deserted can, processing is simple. Wet Qi Wu catchs market system to have drip water, gush drenchs device of type, water shade type. Drip water unit also calls chute device, it is spray paint room mist of lacquer of the first class filters device, the setting clears in the Qi Wu of spray paint room of the room in front, can divide wait for a form for eject and overflow. The water that gush drenchs type device is to use spray will clean Qi Wu, by clean room housing and composition of all of spray water system, clean room housing to be steel structure, its length is the length of spray paint room, to satisfy the requirement that gush washs, a few interval are lain between with armor plate inside housing, all of spray water system is the body that rinses Qi Wu, cleaning room housing inside, every nozzle is separated with fender, make air current flows zigzag, undertake multistage is cleaned. Gush drenchs type device jams easily, clear workload is big, can use at gush to drench alone room of type spray paint, using at room of spray paint of water shade type, with drip water unit is amalgamative use effect is better. Device of water shade type is to use close-grained water shade to clean Qi Wu, drench with gush type photograph is compared, the structure is simple, do not need nozzle and conduit, from go up at all eliminated jam, device of water shade type has multistage water shade and sign of cochlea form water two kinds of structures. Device of water shade type is in a few activities pensile plate upside sets overflow groove, make water overflow is in water shade board on, in order to form close-grained water film, suck blast tuyere place to form a water shade in cistern. Dry type filters means does not use water, without the generation of liquid waste, by moving charge, asks wind force and wind pressure are little, coating loss is little. But this kind of means filters Qi Wu is not complete, equipment pollution is serious, ablaze dangerous sex is big. Wet filter means has liquid waste to arise, need installs liquid waste processing system additionally. Additional, wet filter the fan wind pressure that means place asks is higher, increased coating thereby use up.

5, water supply (wet) water supply wait for composition by water pump, pipeline. The water supply quantity of spray paint room can press type calculates: The Gw in type of E of · of Gw=Q · у — total water supply of spray paint room is measured (Kg/h) Q — the platoon wind force of spray paint room (M3/h) . . у — weight of air of the mist that contain lacquer (Kg/m3) , е of general =1.2 extraction у — water air is compared, ～ of general =1.6 extraction е 2.5

6, Qi Ni processing system (wet) Qi Ni processing has two kinds of kind: One kind is direct the cistern inline processing in spray paint room, another kind is setting loop cistern. Inside the cistern of room of past spray paint or garrulous is joined to coagulate in circular cistern agent, make the Qi Di in water is condensed each other, the boiler circulation after salvaging lacquer broken bits artificially is used. Liquid waste of the mist that contain lacquer is discharged regularly to useless water treatment the station undertakes handling.

7, at present most besmear installs system of electric equipment control the wiring on product line still is controlled with PLC, but quite one part already made what show and monitor use in use PC, progressively ground will transfer to replace PLC with the PC entirely, such processing capability rise greatly, user interface is friendly. Control of new electric equipment ark has done not have the pushbutton of a platoon on ark face plate.

8, spray paint house is defeated centrally, house of spray paint of the system that move lacquer is defeated centrally, the system that move lacquer is average by system of position control of system of feed in raw material, fluid, agitate system, circulatory system, filter system, heat preservation system and electronic-controlled the composition such as the system.

The action of system of feed in raw material of system of 8.1 feed in raw material is the system losing a surname to spray booth uses add coating, wait for composition by membrane pump of the canister losing a surname, canister that move lacquer, pneumatic, siphon and filter of feed in raw material normally. (1) the action of membrane pump of pneumatic of pneumatic membrane pump is to carry coating. Because pneumatic membrane pump has cost,low, the sources of energy uses up little merit, because this is in system of feed in raw material,be used in great quantities. (2) the action of filter of feed in raw material of filter of feed in raw material is the impurity in eliminate coating. Can install filter of feed in raw material before feed in raw material alone (use filter of filter core type mostly) , this kind is used to filter like solvent Qi Yi means; Also need not install filter of feed in raw material alone, undertake filtering to feed in raw material through 3 as common as the filter that answer lacquer means however, lacquer of ability in swimming uses this kind to filter commonly means.

The fluid that the action of system of position control of fluid of system of 8.2 fluid position control is the coating in controlling canister losing a surname and tone lacquer canister, position control of fluid of type of ball having surplus implement with ultrasonic fluid position control implement. (1) position control of fluid of float ball type implement position control of fluid of float ball type implement be opposite according to mechanical principle coating fluid undertake controlling. Means of position control of this kind of fluid is churned easily by beater fluid is caused when coating fluctuant influence, control precision is not so tall. (2) ultrasonic fluid position control implement ultrasonic fluid position control implement control fluid through sensor. This system is mixed with canister losing a surname normally the fluid of the canister that move lacquer chain of pressure control system, rate of the feed in raw material that has control to be defeated by lacquer canister and tone lacquer canister, mix and fluid call the police wait for a function.

8.3 agitate system is defeated by lacquer canister and the paint inside the canister that move lacquer to be able to disperse to make even, performance is steady, reduce the shearing force of smooth to metallic Qi Hezhu lacquer, all use beater of electric machinery of slowdown of frequency conversion pilot on the paint canister of system losing a surname, this beater can pass fluid the height of face of fluid of sensor perception paint. Can pass control ark the rotate speed of self-adjusting beater, make beater job is inside reasonable rotate speed range. To assure favorable agitate result, must notice the following. A. Canister losing a surname and a person operating from within in coordination with outside forces of the canister that move lacquer should do not have blind angle, because this requires a basis,the diameter of paint canister and height choose the paddle diameter of beater and runner shaft length. B. Mix rate should proper. Mix rate is too rapid, can cause to paint excessive the property that cut and has caustic painting, when besmear is installed, easy generation chromatism is mixed stream hang wait for blemish; Mix rate is too slow, can cause paint precipitation, affect the uniformity of paint. Accordingly, be defeated in the design, when the system that move lacquer, often basis before the structure of paddle of the electric machinery system of experience choice beater, agitate and dimension, achieve first-rate agitate result thereby. The structure of agitate paddle is 3 kinds by its function cent: A. Low cut, high flow; B. Low pressure, low flow; C. Tall cut, low flow.