Cascade venturi type paint spray booth
Technical field
The utility model relates to a kind of cascade venturi type paint spray booth.
Background technology
Usually, spraying paint of the product of various production in enormous quantities such as body of a motor car or auto parts and components finished in the paint spray booth mostly, promptly at the indoor paint spraying apparatus that sprays paint product carried out spray painting operation.In the painting process, can not swim in the air in the paint spray booth attached to the paint on the product, form coating cloud, therefore need the fresh air of the supply of the workspace in the paint spray booth constantly, and use gas extraction system that coating cloud is removed, include paint particles in the gas of discharging, therefore be disposed to and catch paint particles earlier before outdoor, avoid environment is polluted at it.
At present, most of paint spray booths all are provided with the device of catching coating cloud, and multiple acquisition mode is arranged, and wherein adopt many be water curtain type and venturi type.Water curtain type spray chamber mainly utilizes water curtain plate, and water system provides the water source, and current flow down along water curtain plate and form uniform cascade, and the coating cloud of suspension can be caught by cascade after touching cascade; The venturi type paint spray booth generally adopts the top to send into pure air, when spraying paint the workspace, process takes away the contaminated air that contains coating cloud, entering venturi type coating cloud processor with rinse water then handles, paint particles can be separated effectively with air in venturi type coating cloud processor, and the air that has separated paint particles then is pumped to outdoor by blower fan.In general, water curtain type spray chamber utilizes cascade can catch the coating cloud that the paint spray booth produces when operation, but because the coating cloud treatment effeciency is not high, still has the air mixture that part contains coating cloud to be discharged in the outdoor environment after handling; Though and the venturi type paint spray booth can handle the contaminated air that contains coating cloud; but because the venturi processor is installed in the bottom of paint spray booth; bad for the treatment effect that is suspended in the coating cloud in the paint spray booth; coating cloud is attached on the wallboard of paint spray booth easily; can not effectively protect the environmental quality of inside, paint spray booth; therefore the paint spray booth of this dual mode is not very desirable to the treatment effect of coating cloud, has certain defective.
The utility model content
The purpose of this utility model is to provide a kind of cascade venturi type paint spray booth, can effectively protect the indoor environment of spraying paint, and is splendid to the capturing efficiency of coating cloud, and the energy consumption of equipment is not high.
For achieving the above object, the technical solution of the utility model is a kind of cascade venturi type paint spray booth, comprise upper chamber, main chamber and lower chambers, the top of described upper chamber is provided with the filter of sending into the air-supply arrangement of pure air and being used to filter pure air to inside, paint spray booth, described main chamber links to each other with upper chamber by filter, be provided with spray-painting plant in the described main chamber, it is characterized in that: described main chamber also is provided with the cascade device, it comprises the water curtain plate on the madial wall that is installed in main chamber, be used for the cascade tank of water storage and the cascade water supply installation that supplies water to the cascade tank, be provided with the venturi processor in the described lower chambers, described lower chambers links to each other with main chamber by the arrival end of venturi processor, the bottom of described lower chambers is provided with the gutter that is used for waste discharge, and the port of export of described venturi processor also is connected with air exhausting device.
Main chamber described in the utility model also comprises wash plate, described wash plate is positioned at the below of spray-painting plant, the end of described wash plate is provided with the washing tank that is used for water storage and to the washing water supply installation of its water supply, described venturi processor is installed on the wash plate by its arrival end.Described venturi processor comprises contraction section, aditus laryngis section and diffuser, the front end of described aditus laryngis section links to each other with the end of contraction section, the end of aditus laryngis section links to each other with the front end of diffuser, the cross section of described contraction section is tapering type from its arrival end to end, the cross section of described aditus laryngis section is constant formula, the cross section of described diffusion end is gradual from its front end to the port of export, one side of the body of described aditus laryngis section is provided with the adjustable plate that is used to regulate aditus laryngis section cross section size, the opposite side correspondence is provided with fixed head, adjustable plate is if move in pipe, the cross section of aditus laryngis section then diminishes, conversely, adjustable plate is if the cross section of mobile aditus laryngis section then becomes big outside pipe.
Air exhausting device described in the utility model comprises exhaust blower and exhaust duct, and described exhaust blower is connected by the port of export of exhaust duct with the venturi processor.
As further improvement of the utility model, described air-supply arrangement is a pressure fan, and described filter comprises cloth envelop collector and top filter cotton.
During work, pressure fan is sent into indoor from the top of upper chamber air, go into main chamber through cloth envelop collector and top filter cotton are laggard, the cascade water supply installation supplies water to the cascade tank, water level in the cascade tank can overflow and the uniform cascade of formation on water curtain plate after being higher than water curtain plate, the coating cloud that produces during spray painting operation is caught by current after touching cascade, mixed with the air that contains coating cloud and form air-water mixture and under the effect of exhaust blower attraction, be inhaled into the venturi processor, and after the coating cloud that is not captured by cascade taken to wash plate by indoor exhaust wind, be brought in the venturi processor with the current on the wash plate.The high blast of exhaust blower forms high wind speed in the venturi processor, can increase at the wind speed that diminishes of contraction section along with the body cross section, cross section minimum at aditus laryngis section body, wind speed reaches maximum, can change the cross section size of aditus laryngis section by mobile adjustable plate, and then can regulate needed maximum wind velocity value, at diffuser along with the increase wind speed of body cross section then diminish, water in the air-water mixture is atomizing gradually under the effect of high-speed wind power, do turbulent motion with air, water smoke and coating cloud fully mix, and water smoke is caught airborne coating cloud particulate, in the reduction of diffuser along with flow velocity, water smoke collision mutually under the effect of gravity and wind-force of sticking the coating cloud particulate, condense into the bigger water droplet that contains the coating cloud particulate of particle diameter and flow in the gutter, air is discharged outdoor by exhaust blower, realize separating of coating cloud and air.
Compared with prior art, the utility model has following beneficial effect:
(1) the utility model has the advantage of water curtain type and two kinds of paint spray booths of venturi type concurrently, utilize the required water in venturi paint spray booth at indoor formation cascade with the internal environment in protection spray painting operation district and catch coating cloud, while utilizes the special structure treatment of venturi processor to contain the water and air of coating cloud again, capturing efficiency to coating cloud is high, can reach more than 98%;
(2) energy consumption of the present utility model is not high, and is suitable with independent venturi type paint spray booth.
(3) the utility model purposes is very extensive, can be applicable to automobile, motorcycle, household electrical appliances, five metals etc. and need carry out the various industries of surface-treated.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is a structural representation sketch of the present utility model;
Fig. 2 is the structural representation sketch of venturi processor in the utility model.
The specific embodiment
A kind of cascade venturi type paint spray booth as depicted in figs. 1 and 2, comprise upper chamber 3, main chamber 8 and lower chambers 13, the top of upper chamber 3 is provided with air-supply arrangement and filter, air-supply arrangement is made up of pressure fan 2, be used for sending into pure air to inside, paint spray booth, filter is used to filter pure air, comprise cloth envelop collector 4 and top filter cotton 6, main chamber 8 links to each other with upper chamber 3 by filter, be provided with spray-painting plant 9 and cascade device in the main chamber 8, the cascade device comprises the water curtain plate 7 on the madial wall that is installed in main chamber 8, be used for the cascade tank 5 of water storage and the cascade water supply installation 1 that supplies water to cascade tank 5, also be provided with wash plate 12 in the main chamber 3, wash plate 12 is positioned at the below of spray-painting plant 9, and the end of wash plate 12 is provided with the washing tank 11 that is used for water storage and to the washing water supply installation 10 of its water supply.
Be provided with venturi processor 15 in the lower chambers 13, venturi processor 15 is installed on the wash plate 12 by its arrival end, lower chambers 13 links to each other with main chamber 8 by the arrival end of venturi processor 15, venturi processor 15 comprises contraction section 151, aditus laryngis section 152 and diffuser 153, the front end of aditus laryngis section 152 links to each other with the end of contraction section 151, the end of aditus laryngis section 152 links to each other with the front end of diffuser 153, the cross section of contraction section 151 is tapering type from its arrival end to end, the cross section of aditus laryngis section 152 is constant formula, and the cross section of diffusion end 153 is gradual from its front end to the port of export; One side of the body of aditus laryngis section 152 is provided with the adjustable plate 154 that is used to regulate aditus laryngis section 152 cross section sizes, its opposite side correspondence is provided with fixed head 155, adjustable plate 154 is if move in pipe, the cross section of aditus laryngis section 152 then diminishes, conversely, adjustable plate 154 is if the cross section of mobile aditus laryngis section 152 then becomes big outside pipe.
The port of export of venturi processor 15 also is connected with air exhausting device, and air exhausting device comprises exhaust blower 17 and exhaust duct 16, and exhaust blower 17 is connected with diffuser 153 by exhaust duct 16, and the bottom of lower chambers 13 is provided with the gutter 14 that is used for waste discharge.
During work, the inside of paint spray booth sent into pure air by pressure fan 2 from the top of upper chamber 3, pure air is successively gone into main chamber 8 through cloth envelop collector 4 and top filter cotton 6 are laggard, cascade water supply installation 1 supplies water to cascade tank 5, when the water level in the cascade tank 5 is higher than water curtain plate 7, water in the tank 5 overflows and the uniform cascade of formation on water curtain plate 7, the water film thickness of cascade is greater than 5mm, the coating cloud that is produced during spray painting operation is caught by current after touching cascade, with the air that the contains coating cloud formation air-water mixture that mixes, air-water mixture is inhaled into venturi processor 15 under the effect of the attraction of exhaust blower 17, washing water supply installation 10 simultaneously supplies water to washing tank 11, water overflows when water level is higher than the height that washs tank 11, and current are washed away in formation on wash plate 12, after the coating cloud that is captured by cascade is not taken to wash plate 12 by indoor exhaust wind, be brought in the venturi processor 15 with the current that wash away on the wash plate 12.
The high blast of exhaust blower 17 forms high wind speed in venturi processor 15, more than the wind scooter 20m/s, arrival end from contraction section 151, along with diminishing of body cross section, wind speed can increase gradually, and when aditus laryngis section 152, because the cross section minimum of body, wind speed can reach maximum, and its maximum wind velocity can adjust that (adjustable plate 154 is if mobile in pipe, and the cross section of aditus laryngis section 152 then diminishes by adjustable plate 154, it is big that wind speed becomes, conversely, adjustable plate 154 is if move outside pipe, and it is big that the cross section of aditus laryngis section 152 then becomes, wind speed diminishes), at diffuser 153, along with the increase of body cross section, wind speed again then diminish.
According to hydromechanical theory, the air-flow and the current that contain coating cloud are in laminar condition under the lower situation of flow velocity, and air-flow flows through between the gap of current, and two kinds of fluids are with separately flow velocity motion; And when the flow velocity of fluid in pipeline increases to a certain degree, can produce transverse movement and form turbulent flow, and in the aditus laryngis section of venturi processor with special construction, it is maximum that the flow velocity of air-water mixture reaches, formed turbulent flow, current wherein are atomizing gradually under the effect of high-speed wind power, in violent turbulent motion, because fluid produces transverse movement, water smoke and coating cloud fully mix, and water smoke is caught airborne coating cloud particulate, the coating cloud particulate sticks on the water smoke, and arrived diffuser, along with the reduction of flow velocity, stick water smoke collision mutually under the effect of gravity and wind-force that the coating cloud particulate is arranged, condense into the bigger water droplet that contains the coating cloud particulate of particle diameter, flow in the gutter 14, and that the air that has been cleaned is discharged by exhaust blower 17 is outdoor, realizes separating of coating cloud and air.