RU2011429C1 - Lacquer coating applying and drying device - Google Patents

Abstract

FIELD: coating application equipment. SUBSTANCE: blowing ventilation system conditioner is mounted on coating application chamber. Transportation system has cart with platform mounted for displacement along guides by means of electromechanical drive. Platform of cart may be lifted by means of pneumatic drive. Each chamber has its own foundation. Hydraulic filters are disposed below coating application chamber along its axis and dry filters are disposed below drying chamber in symmetry with axis of this chamber. Gates are made in the form of rigid panels, which may be lifted so that they are displaced along vertical guides by means of electromechanical drive. Coating application chamber blowing ventilation system is provided with moisture separator, which has a set of curved plates disposed in vertical channel in vertical position, and damper. Conditioner has two units with blowing ventilation air-duct, fan, electric hot air heater, cooler and air outlet pipe, with all members mentioned being connected in series. Dry filter has two detachable cellular frames and filtering member positioned between them. EFFECT: reduced dimensions of device and improved quality of coating application. 9 dwg

Description

 The invention relates to painting equipment, and in particular to equipment for applying and drying coatings, in particular to installations in which the painting and drying of cars, bodies and body parts of cars are carried out, and can be used for painting and drying other products in various enterprises and service stations.

 Known chamber for applying and drying coatings [1], which includes a forced ventilation system, exhaust ventilation system with hydraulic filters and a hot air supply system. The chamber is equipped with a hot air exhaust system and rotary dampers installed in the side and middle cavities, alternately communicating the side cavities when painting with the exhaust ventilation system, and during drying, with the hot air exhaust system and communicating the middle cavity with the fresh air ventilation system, and when drying, with hot air system.

Dyeing and drying processes are carried out in one screen, which makes the camera difficult and leads to low efficiency and large specific energy consumption per product is stained due to the periodic heating step for drying the primer or enamel to a temperature of 90-130 ^{° C} and cooled to a temperature of 18- 22 ^о С for coating, and the use of one common foundation and a supply and exhaust ventilation system with switching flaps makes it very difficult to obtain a coating of the required quality.

 A known installation for dyeing and drying products [2], which includes hydraulic filters, exhaust ventilation system, supply duct and heat ventilation system. The installation is equipped with bunkers with folding shutters, one end of which is attached to the ceiling of the camera body and the other is fixed in the bunker, and drive trolleys connected to the bunkers and installed in vertical guides fixed to the camera body.

 The use of folding curtains in one volume does not give the effect in quality that is obtained in the proposed solution. The closest in technical essence to the proposed one is the installation of painting and drying with one parking place for painting and friction for drying, installation dimensions: 16915x7315x4722 mm.

 It consists of painting and drying chambers, separated by curtain gates, two channels pass through both chambers in a single for both chambers foundation for a plate conveyor, which serves to move cars (bodies) from the painting chamber to the drying chamber and from the drying chamber outside the installation .

 The conveyor is driven by a bulky drive located outside the chambers in the pit.

 Air recirculation in the drying chamber is carried out according to the scheme: supply from the duct to the ceiling - intake through the side ducts.

 Air is supplied to the spray booth from the UTTS-40 large-sized air conditioner (dimensions 7600x3500x2600 mm), not included in the N 10.005 installation, installed in a separate room of 5000x10000 mm in size, according to the scheme: inflow through ceiling filters - intake and exhaust through hydraulic filters that make up the side cameras [3].

 The installation has large dimensions, it requires a bulky air conditioner and an additional room for air supply, which makes it impossible to use it at service stations of less than 35 posts.

 The presence of the conveyor leads to an increase in the energy consumption for drying the product and an increase in the “weediness” of the coating due to the intake of contaminated air through the foundation channels.

 The air recirculation scheme in the drying chamber due to air intake through the lateral air ducts does not allow to obtain the same temperature over the entire height of the body and increases the dimensions, and the air supply and intake scheme in the spray booth makes the working conditions for the painter not the same over the chamber area.

 The purpose of the invention is to reduce the dimensions of the installation and improve the quality of coating products.

 This goal is achieved by the fact that in the proposed installation, the air conditioning of the ventilation system is placed on the painting chamber, the technological transport is made in the form of a trolley mounted to move along the rails by means of an electromechanical drive, and the platform of the trolley is made lifting by means of a pneumatic drive, the foundation is made separate for each chamber, moreover, under the painting chamber, the hydraulic filters are placed along its axis, and under the drying chamber - dry filters - symmetrically to the camera axis, the gate is made lifting in the form of a rigid canvas installed with the possibility of moving along vertical guides by means of an electromechanical drive, the exhaust ventilation system of the paint chamber is equipped with a moisture separator, which is made in the form of a set of bent plates placed vertically in the output channel, and a gate to control the flow of discharged air, and the air conditioner of two units in which the supply air duct, fan, electric air heater, cooler and outlet are connected in series second duct, and the dry filter is in the form of two separable mesh framework and disposed between the filter element.

 In FIG. 1 to 3 schematically depict the proposed installation; in FIG. 4 - technological transport - the platform of the trolley in the raised position with a lift drive; in FIG. 5 - trolley platform in the initial position; in FIG. 6 - 7 - air conditioning of the supply ventilation system; in FIG. 8 - dry filter; in FIG. 9 is a diagram of air recirculation in the drying chamber.

 Installation for applying and drying coatings includes a painting chamber 1 for one car place and the associated drying chamber 2 for two car places. The chambers 1 and 2 are separated by a wall 3, in which a gate 4 is installed, which is a rigid web, the hoist drive 5 of which is located on the chamber 2. Under each chamber 1 and 2, its own foundation is made, not connected to the other. A foundation 6 is made under the coloring chamber 1, in which hydraulic filters 8 are placed under the grating 7, a pit 9 and a channel 10 for the outlet of the cleaned air, in which the moisture separator 11 is installed. The exhaust air flow is regulated by the gate 12. Under the drying chamber 2, the foundation 13 is made, which under the grating 14 are placed dry filters 15 and channels 16 are made for recirculation of hot air. As a filtering material, Sipron TU 17-1383-75 and other coarse fiber materials are used.

 To move the painted product 17, the technological transport is made in the form of a trolley 18 having an electromechanical drive 19 and mounted on guides 20 having a length from the paint chamber 1 to the drying chamber 2 through the doorway 4. The drive 19 is installed in the pit 21 and consists of an engine 22, gearbox 23.

 The platform 24 of the trolley 18 is made lifting for ease of processing the bottom of the side surfaces of the body 17. Using the pneumatic cylinder 25, the platform 24 has the ability to rise from the starting position by 500 mm.

 The exhaust ventilation system includes hydraulic filters 8, a pit 9 and a channel 10 connected to the floor level of the room, and a water separator 11 made in the form of bent plates mounted vertically. The flow of exhaust air is regulated by the gate 12.

 In FIG. 7 air conditioning of the supply ventilation system providing for air heating in the winter season and its cooling in the summer.

 The air conditioner is made of two units - one of cooling, the other for heating the air. The unit for cooling and air purification consists of a supply air duct 26, a fan 27, an air duct 28, a cooler 29, and a common outlet air duct 30 connected in series, and a unit for heating and air purification consists of a supply air duct 31, a fan 32, an air duct 28, an electric air heater 33.

 The dry filter consists of a frame 34 and a filter element 35.

 The hot air supply system includes a heat generator, which consists of air ducts 36, a fan 37 and an electric air heater 38.

 Installation works as follows.

 The car body prepared for painting is installed in the painting chamber 1 on the trolley 18, the platform 24 of which is in the initial (lower) position. Chambers 1 and 2 close tightly. Supply air enters from the atmosphere through the air conditioner into the roof opening and, passing through the fine filter 39, enters chamber 1, begins to move vertically downward, washing the head and chest of the worker, as well as the body, is taken through the hydraulic filter and emitted into the atmosphere. The coloring process begins. The thresholds and lower parts of the body panels, as a rule, are poorly stained, therefore, to exclude this defect, the platform 24 is raised by the pneumatic cylinder 25 together with the body to a height of up to 500 mm from the initial position, which ensures better quality of painting.

 Sprayed paint particles that have not settled on the surface of the body 17 are picked up by a stream of air and, passing through the grating 7 and the water curtain of the hydraulic filter 8, settle in the pit 9. The water curtain is regulated by the shields of the hydraulic filter 8 and a stream of water in the desired direction. The particles of paint not caught by a water curtain enter humidifier 11 through humidifier 12 into a moisture separator 11, where together with moisture they hit its walls and drain into the well of a sump 9, and the cleaned air is released into the atmosphere.

 For air purification, recycled water is used, which has two degrees of purification: the first by settling large particles of paint in the pit 9 on the surface of the water and the second by passing water through the hydraulic filters 8.

 Water contaminated with paint is periodically pumped out as it gets dirty and replaced with clean water, and the sludge is removed manually.

 At the end of painting, chamber 1 is aired with closed gates for 5 minutes.

 After painting and airing, the painted car body on the trolley 18 by means of an electromechanical drive 19 is moved along the guides 20 into the drying chamber 2. At the same time, the gate 4 rises and the trolley 18 with the body 17 moves into the chamber 2, where it stops at a free post, the platform 24 is lowered, and the body is supported by the technological trolley. Then, with the electromechanical drive 19, the trolley 18 is returned to the chamber 1. The following body 17 is installed on the trolley 18. The lifting gate 4 is lowered, the painting process begins in the chamber, and the drying process in the chamber 2, which is carried out by recirculation of the air heated by the heat generator with the addition of 10% fresh air from the workshop.

 The recirculated air is sucked in by the fan 37 through the filters 15 through the channels 16 of the chamber and, passing through the heat generator, heats up. Then it is pumped into the chamber through the ceiling duct. With a vertical downward movement, heated air from all sides washes the product, which allows you to get a uniform temperature over its entire surface. When the temperature in the drying compartment reaches 90 ° C, the heat generator automatically turns off.

 The temperature regime during the drying process is automatically supported by thermometer sensors installed on the side panel of chamber 1.

 The automatic control and regulation system allows you to maintain the temperature of the recirculated air within the specified limits, as well as to exclude the possibility of turning on the heat generator with the fan 37 turned off.

 During drying, the air is constantly cleaned by passing through a dry filter 15, and in order to avoid the formation of a concentration of solvent vapor in the chamber 2, an influx of fresh air is provided up to the explosive limit.

 The air saturated with solvent vapors is vented to the atmosphere through a pipe 40 installed in front of the electric heater 38. The amount of air emitted is regulated by a throttle valve.

 The dried body 17 is rolled out of the drying chamber 2 on a transport trolley, where after painting the next body is placed.

Claims (1)

 INSTALLATION FOR APPLICATION AND DRYING OF PAINTS AND COATINGS, containing painting and drying chambers with dry filters, separated by a gate, foundation, supply and exhaust ventilation systems with hydraulic filters, as well as a hot air supply system and technological transport, characterized in that, in order to reduce the size and improve the quality of product coverage, the air conditioning of the ventilation system is located on the painting chamber, the technological transport is made in the form of a trolley with a platform installed with the ability to move along n guiding by means of an electromechanical drive, and the trolley platform is lifting by means of a pneumatic drive, the foundation is made separate for each chamber, and under the painting chamber the hydraulic filters are placed along its axis, and under the drying chamber - dry filters are symmetrical to the camera axis, the gate is made lifting in the form of a rigid canvas installed with the possibility of moving along vertical rails by means of an electromechanical drive, the exhaust ventilation system of the painting chamber is equipped with a moisture separator, which made in the form of a set of bent plates placed vertically in the outlet channel, and a gate for regulating the flow of discharged air, moreover, the air conditioner is made of two units in which the supply air duct, fan, electric air heater, cooler and exhaust duct are connected in series, and the dry filter is made in the form of two detachable mesh frames and a filter element located between them.

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