CN112076931A - A rail transit integral wheel coating production line and its use method - Google Patents

Abstract

The invention discloses a coating production line for an integral wheel of rail transit, which is characterized in that a feeding station 1, a pre-degreasing station 2 for pre-treating the integral wheel, a degreasing station 3, a hot water cleaning station 4, a normal-temperature water ladle washing station 5, an integral wheel dehydration drying station 6 for rail transit, a paint coating first station 7 for coating paint on the integral wheel, a paint coating second station 8, a leveling station 9 for finishing paint coating of the integral wheel for rail transit, a paint drying station 10 for finishing paint leveling of the integral wheel for rail transit, a strong cooling station 11 and a blanking station 12 for finishing paint drying of the integral wheel for rail transit, and a wastewater treatment station 13 and a sludge filter pressing station 15 are further arranged on the coating production line in sequence. The material loading station 1 is provided with a cantilever crane, and can realize the suspension type material loading of wheel hub holes. The invention also discloses a use method of the rail transit integral wheel coating production line.

Description

A rail transit integral wheel coating production line and its use method

technical field

The invention belongs to the technical field of coating protection, and in particular relates to a rail transit integral wheel coating production line and a method for using the same.

Background technique

The integral wheel for rail transit is used as the main structural part of the rail vehicle. Due to its high speed and harsh operating conditions, in the production process of the integral wheel for rail transit, in order to ensure its corrosion resistance and aesthetic requirements, the integral wheel for rail transit is not required. Applying paint for protection is an essential process. Existing overall wheel painting for rail transit is mostly flat-lying spraying or manual painting, which is of poor quality and low efficiency. In the prior art, there is no systematic, assembly-line batch coating production process for coating integral wheels for rail transit.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a rail transit integral wheel coating production line with a simple structure and convenient use, which can not only improve the coating quality of the rail transit integral wheel, meet the needs of different customers, improve the Coating efficiency, saving energy and resources, and also have the advantages of good production environment and no pollution to the environment. The invention also provides a method for using the rail transit integral wheel painting production line.

In order to achieve the above purpose, the technical scheme of the present invention is as follows: a rail transit integral wheel coating production line, wherein the coating production line is sequentially provided with a feeding station, a pre-degreasing station for pre-processing the integral wheel, and a degreasing station. Work station, hot water cleaning station, normal temperature ladle washing station, dehydration drying station, the first paint coating station, the second paint coating station, and the leveling station for painting the whole wheel , paint drying station, strong cooling station and blanking station, and the coating production line also has a wastewater treatment station and a sludge filter press station.

Further, the pre-degreasing station, the degreasing station, the hot water cleaning station and the normal temperature ladle washing station are all equipped with a spray system, and the spray system includes a water tank and a spray pipe. The downward and upward feeding method with the same spray pressure at different places, the nozzle angle of the spray system is adjustable, the spray pipe material is made of corrosion-resistant, temperature-resistant reinforced polypropylene material, the spray pipe pressure is adjustable, and the temperature in the water tank is controllable.

Further, a degreasing agent is added to the water tanks of the pre-degreasing station, the degreasing station and the hot water cleaning station, and a rust inhibitor is added to the water tank of the normal temperature water ladle washing station.

Further, the furnace bodies at the dehydration and drying stations and the paint drying stations are both thick rock wool storage board assembled structures, and the circulation pipes in the furnace body adopt the method of sending up and returning air, and the dehydration and drying passages and the paint drying channels are used. The drying channel is equipped with infrared radiation heating device and steam heating device. There are also exhaust gas discharge devices in the dehydration drying channel and the paint drying channel. The inlet and outlet of the dehydration drying channel and the paint drying channel are separated by air curtains. hot.

Further, the paint coating first station and the paint coating second station respectively paint the inner side of the wheel and the outer side of the wheel, and the paint coating first station and the paint coating second station are The spray booths are all scroll-type water curtain spray booths. The scroll-type water curtain spray booths are mainly composed of a water curtain board, a suction board, a baffle air-water separator, a water tank, a return water channel, and a purification air supply system. An exhaust gas device is also provided in the paint spraying chamber at the first painting station and the second paint painting station.

Further, the leveling station is provided with a leveling chamber, an activated carbon adsorption system is provided in the leveling chamber, the wheel leveling time is 10-15 minutes, and the activated carbon adsorption system is a 5000m ³ /h air volume activated carbon waste gas treatment system, dehydration and drying. The exhaust gas devices at the station and the paint drying station, the exhaust gas devices in the paint spraying chamber at the first paint coating station and the second paint coating station are all connected with the 5000m ³ /h air volume activated carbon exhaust gas treatment system.

Further, the strong cooling station is provided with a strong cooling room, the air volume in the strong cooling room is 14000m ³ /h, and the wind pressure is 650Pa.

Further, the waste water treatment station is equipped with a waste water treatment system, and the waste water generated by the pre-treatment degreasing in the workshop is treated at 1 ton/hour; The paint slag and sludge generated in the process are dewatered, and the sludge filter press station is also provided with a sludge tank for storing the sludge generated by the sludge press filter station, and a sludge tank for storing the wastewater generated during the coating process. collection well.

Further, the feeding station is provided with a suspension conveying system, the wheels are loaded by hole hanging type, and the suspension conveying system adopts XT160 type touch-forging open suspension conveying chain, which is equipped with a single drive device, a tensioning device, Frequency conversion speed control device, catenary lubrication adopts automatic spray lubrication, and there are many emergency stop buttons on the whole line.

Based on the above-mentioned one rail transit integral wheel coating production line, the present invention also relates to a method of using the rail transit integral wheel coating production line, the use method is:

Step 1. Use a cantilever crane to place the whole wheel on the suspension conveying system at the loading station. The suspension conveying system transports the whole wheel to the pre-degreasing station for spray cleaning. The cleaning water tank adds degreaser 20± according to the number of wheels. 5㎏, the cleaning water temperature is adjusted to 40-60℃, and the spray pressure is adjusted to 0.15MPa-0.18MPa; after the pre-degreasing, the suspension conveying system transports the body wheel to the degreasing station for spray cleaning, cleaning water temperature, cleaning pressure Same as the pre-degreasing station, add degreaser 10±5㎏ to the washing tank according to the number of wheels;

Step 2. After degreasing, the suspension conveying system transports the whole wheel to the hot water cleaning station for hot water cleaning, and then transports the whole wheel to the normal temperature ladle washing station for ladle washing, and the ladle washing water temperature is 20±5 ℃, the pressure of ladle washing is the same as that of the pre-degreasing station, and the ladle washing tank should add rust inhibitor 10±5㎏ according to the number of wheels;

Step 3. The suspension conveying system transports the whole wheel to the dehydration and drying station for drying. The drying temperature is adjustable within the range of 50-165 °C. The automatic temperature control system uses temperature sensors and digital display temperature controllers as control. The automatic temperature control is realized by controlling the on-off of the steam solenoid valve; the exhaust gas generated during the drying process is adsorbed and purified by the activated carbon exhaust gas treatment system with an air volume of 5000m ³ /h set at the leveling station to adsorb and purify the organic exhaust gas generated by the wheels. ;

Step 4. The whole wheel after drying is transported to the first station of paint coating, the inner side of the wheel is painted at the first station of paint coating, and then transported to the second station of paint coating to complete the wheel The outer side is painted; after the painting is completed, the suspension conveying system transports the whole wheel for rail transit to the leveling station, and the wheel is leveled at the leveling station for 10-15 minutes. The station is equipped with an air volume of 5000m ³ /h The activated carbon waste gas treatment system adsorbs and purifies the organic waste gas generated by the wheel dehydration and drying station, the first paint spraying station, the second paint spraying station, the leveling station and the paint drying station;

Step 5. After the wheel leveling is completed, the suspension conveying system transports the integral wheels for rail transportation to the paint drying station for drying. The station adopts steam heating + electric infrared radiation auxiliary heating. The drying station is the same, the exhaust gas generated during the drying process is adsorbed and purified by the activated carbon exhaust gas treatment system with an air volume of 5000m ³ /h set at the leveling station; after the drying of the wheels is completed, the whole wheel is transported to the strong cooling station Cool down, where the air volume is 14000m ³ /h and the air pressure is 650Pa to speed up the curing of the paint film; the wheels after strong cooling can be cut at the cutting station or the above process can be repeated to complete the second paint coating.

The advantages of adopting the technical solution of the present invention are:

1. The production line of the present invention adopts the form of assembly line operation. The suspension conveying system can perforate and hang the integral wheel for rail transit, and can paint the inner and outer sides of the integral wheel for rail transit at one time. The working system is 250 days/year, 8 hours. Calculated per day, 25,000 integral wheels can be painted annually, the wheel painting efficiency is more than 5 times that of traditional manual painting, and the painting cost is reduced to less than 50% of the manual painting cost.

2. The spray system of the present invention adopts the downward and upward feeding method to ensure that the spray pressure is consistent everywhere, reduce blockage, and the spray system nozzles can be quickly removed and replaced, and the angle can be adjusted. The spray pipe material is made of corrosion-resistant and temperature-resistant reinforced polypropylene material, which not only fully meets the requirements of mechanical strength, but also has outstanding advantages such as smooth and clean inside of the pipe, and it is not easy to form slag in the pipe, which avoids the problem of slagging in the traditional pipeline.

3. The dehydration drying channel and the paint drying channel of the production line of the present invention are all designed to be heated by steam + electric infrared radiation. The furnace body is an assembled structure of thick rock wool storage board to prevent heat conduction and heat leakage. The inlet and outlet are separated by air curtains. Heat, the circulating pipeline in the furnace adopts the method of sending and returning air from the top, making full use of the height of the hanger and shoulder to arrange the air duct, which can not only quickly realize the dehydration and drying of the wheels, the baking and curing of the paint, but also reduce the heating space and reduce the cost. At the same time, exhaust gas discharge devices are installed in the dehydration drying channel and paint drying channel. The exhaust gas generated during the drying process is adsorbed and purified by the activated carbon exhaust gas treatment system with an air volume of 5000m ³ /h.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

FIG. 1 is a schematic diagram of the overall wheel coating production line for rail transit according to the present invention.

The marks in the above figures are: 1- feeding station; 2- pre-degreasing station; 3- degreasing station; 4- hot water cleaning station; 5- normal temperature ladle washing station; 6- dehydration drying Station; 7- The first station of paint coating; 8- The second station of paint coating; 9- Leveling station; 10- Paint drying station; 11- Strong cooling station; 12- Cutting worker 13-wastewater treatment station; 14-hanging conveying system; 15-sludge filter press station; 16-sludge tank; 17-water collecting well.

Detailed ways

In the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" ", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential", etc. indicated the orientation or position relationship is based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as Limitations of the present invention.

As shown in Figure 1, a rail transit integral wheel coating production line is provided in sequence with a feeding station 1, a pre-degreasing station 2 for pre-processing the integral wheel, a degreasing station 3, Hot water cleaning station 4, normal temperature ladle washing station 5, dehydration and drying station for integral wheels for rail transit 6, paint coating first station for paint spraying of integral wheels 7, paint coating first station Second station 8. Leveling station for rail transit overall wheel paint after finishing 9, Paint drying station for rail transit overall wheel paint after leveling 10. For rail transit overall wheel paint After drying, the strong cooling station 11 and the blanking station 12 are provided, and the coating production line is also provided with a waste water treatment station 13 and a sludge filter press station 15. The feeding station 1 is equipped with a cantilever crane, which can realize the hanging type feeding of the wheel hub hole.

The pre-degreasing station 2, the degreasing station 3, the hot water cleaning station 4 and the normal temperature ladle washing station 5 are all equipped with a spray system. The spray system includes a water tank and spray pipes. The downward and upward feeding method with the same spray pressure, the nozzle angle of the spray system is adjustable, the spray pipe material is made of corrosion-resistant, temperature-resistant reinforced polypropylene material, the spray pipe pressure is adjustable, and the temperature in the water tank is controllable. A degreasing agent is added to the water tanks of the pre-degreasing station 2, the degreasing station 3 and the hot water cleaning station 4, and a rust inhibitor is added to the water tank of the normal temperature water ladle washing station 5.

The pre-degreasing station 2 is provided with a water tank and a spray pipe, the water temperature in the water tank is controllable, the pressure of the spray pipe is adjustable, and a degreasing agent can be added to the pre-degrase station. The degreasing station 3 is provided with a water tank and a spray pipe, the water temperature in the water tank is controllable, the pressure of the spray pipe is adjustable, and a degreasing agent can be added to the degreasing station. The hot water cleaning station 4 is provided with a water tank and a spray pipe, the water temperature in the water tank is controllable, the pressure of the spray pipe is adjustable, and a degreasing agent can be added to the hot water cleaning station. The normal temperature water ladle washing station 5 is equipped with a water tank and a spray pipe. The water tank is room temperature water, and the pressure of the spray pipe is adjustable. The normal temperature water ladle washing station can add rust inhibitor.

Pre-degreasing station 2, degreasing station 3, hot water cleaning station 4, and room temperature ladle washing station 5 constitute a pre-treatment system. The main advantages of the entire pre-treatment system are: 1. The entire pre-treatment system is a closed structure, all cleaning The process is completed at one time in a closed space. There are inspection doors and platforms on the side of the shed body, and small ladders for entering and exiting the entrance and exit, which are convenient for equipment maintenance personnel to carry out equipment debugging and maintenance; 2. There is a transition section between the cleaning room and the room. The splash-proof door can effectively prevent the liquid from channeling between stations; 3. The entire pretreatment spray adopts a vertical pipeline pump, which can be quickly disassembled and assembled with nylon nozzles. The spray angle of the nozzle is adjustable, which greatly improves the wheel cleaning efficiency; 4. . The entire spray system adopts the downward and upward feeding method to ensure the consistent pressure of the upper and lower nozzles and the cleaning effect; 5. The entire spray pipe is made of corrosion-resistant and temperature-resistant polypropylene materials, which fully meet the mechanical strength requirements. It also has the advantages of being smooth inside the tube, not easy to block, and not rusting; 6. The tank body that provides spray water adopts a double-sided welding structure, and each tank is equipped with a dust-proof movable cover, which is convenient for operation. Tank structure, double-layer SUS304 stainless steel filter screen is installed between the main and auxiliary tanks to remove impurities in the tank liquid and reduce nozzle blockage, and a 50mm thick insulation layer is installed on the outside of the heating tank, which plays a role in thermal insulation and energy saving. . 7. When the equipment is in normal operation, the heating time of the entire pre-treatment water tank is ≤45 minutes, and the noise of the whole machine is ≤85dB according to the test method set by the national standard during use, which has the advantages of fast heating and low noise pollution. 8. The entire pre-treatment system takes only 8-10 minutes from the first wheel entering the pre-degreasing station 2 to the normal temperature ladle washing station 5, and the degreasing efficiency is more than 5 times that of manual degreasing.

The furnace bodies at the dehydration and drying station 6 and the paint drying station 10 are assembled with thick rock wool storage boards. Infrared radiation heating device and steam heating device are provided, and exhaust gas discharge devices are also arranged in the dehydration drying channel and the paint drying channel.

The main points of the dehydration and drying station are: 1. The dehydration and drying channel adopts the assembly structure of thick rock wool storage board, the heating method is steam + electric infrared radiation combined heating, and the inlet and outlet are insulated by air curtains to prevent heat conduction and heat leakage , The circulating pipeline in the furnace adopts the method of sending upward and returning air, which makes full use of the space on the shoulder of the workpiece hanger, improves the effective volume utilization coefficient of the furnace body, reduces the installed power, and avoids the air duct at the bottom of the furnace, which is easy to clean. Save energy; 2. The drying temperature of the 6 dehydration drying stations can be adjusted within the range of 50-165 °C, which can quickly dry the surface moisture of the overall wheel for rail transit. 3. The main air supply pipe adopts a uniform air supply design, and the air supply pipe is equipped with a regulating valve, which ensures the uniformity of the temperature field in the furnace and is easy to adjust. 4. The steam heating system and the circulating fan are installed in the heat preservation chamber. The chamber body adopts the same plug-in structure as the furnace body, which avoids the heat leakage loss of external pipes and fans. Sensors and digital display temperature controllers are used as control elements to realize automatic temperature control by controlling the on-off of the steam solenoid valve; The installed 5000m ³ /h air volume activated carbon exhaust gas treatment system adsorbs and purifies the organic exhaust gas generated by the wheels.

The first paint painting station 7 and the second paint painting station 8 paint the inner side of the wheel and the outer side of the wheel respectively, and the paint painting first station 7 and the paint painting second station 8 are sprayed. The rooms are all scroll-type water curtain spray booths. The scroll-type water curtain spray booth is mainly composed of a water curtain board, a suction board, a baffle air-water separator, a water tank, a return water channel, and a purification air supply system. An exhaust gas device is also provided in the paint spraying chamber at the first station 7 for painting and the second station 8 for painting. When working, most of the air containing paint mist is sprayed onto the front water curtain, which is absorbed by the water curtain, and a small part of the paint mist enters the suction plate at a high speed under the gravitational action of the higher pressure fan, and the paint Under the action of centrifugal force, the mist is further captured by the water film of the entraining plate, and the rest collide with the baffle steam-water separator to form water droplets that fall into the lower part of the cleaning chamber, and flow to the front of the water tank through the return channel, where the paint produced in the water tank is produced. After the slag and sludge are dewatered by the sludge press filtration station 15, they enter the sludge tank 16, and are finally transported and safely disposed of by the qualified waste slag processing unit. The generated wastewater is returned to the wastewater treatment station 13 for treatment. In addition, exhaust gas devices are installed in the spray booth at the first paint coating station 7 and the paint coating second station 8, and the exhaust gas generated during the spraying process passes through the leveling station 9. The air volume of 5000m ³ /h The activated carbon waste gas treatment system adsorbs and purifies the organic waste gas generated by the wheels, which improves the working environment of the sprayers. A 25000m ³ /h purification air supply system is also set up at the first station 7 of paint coating and the second station 8 of paint coating. It is composed of a secondary air purification and filtration system, and the micro-positive pressure control of the purified air supply volume is slightly larger than the exhaust air volume, which ensures the spraying quality of the workpiece.

The leveling station 9 is equipped with a leveling chamber, and the leveling chamber is equipped with an activated carbon adsorption system. The wheel leveling time is 10-15 minutes. The activated carbon adsorption system is an activated carbon waste gas treatment system with an air volume of 5000 m ³ /h. The dehydration drying station 6 and The exhaust gas device at the paint drying station 10, the first paint coating station 7 and the paint spraying chamber at the second paint coating station 8 are all connected to the 5000m ³ /h air volume activated carbon exhaust gas treatment system. The 5000m3/h air volume activated carbon waste gas treatment system is used to treat the organic waste gas generated by the wheel dehydration and drying station 6, the first paint spraying station 7, the second paint spraying station 8, the leveling station 9 and the paint drying station 10. Adsorption and purification.

According to the discharge of organic waste gas at each station, the present invention preferably uses a granular activated carbon adsorption device for adsorption and purification, which is mainly divided into two processes: a. Adsorption process: the organic waste gas is first filtered and purified by an active fiber pre-filter, After the waste gas passes through the primary filter to remove suspended particles, the gas enters the activated carbon box, and after being adsorbed by the activated carbon in the box, the harmful components are removed, and the purified gas that meets the emission standard is discharged, and is discharged to the outside through the fan; b. Desorption regeneration process: activated carbon use When a certain solvent is adsorbed for a period of time, it should be regenerated. During regeneration, 0.07Mpa steam is sprayed into the adsorption box to steam out all kinds of solvents adsorbed in the activated carbon, and then condensed into liquid through the condenser and enters the separation cylinder to separate and recover the organic solvent. The residual liquid enters the aeration tank, the overflow water enters the aeration tank, is aerated by compressed air, and the aeration enters the adsorption box to be adsorbed by activated carbon. The clean water is discharged into the sewer from the aeration tank without secondary pollution.

The strong cooling station 11 is provided with a strong cooling room, the air volume in the strong cooling room is 14000m ³ /h, and the wind pressure is 650Pa, which accelerates the curing of the paint film. According to the process requirements, the wheel after strong cooling can be cut at the cutting station 12 or the second paint coating can be completed by repeating the above process.

Wastewater treatment station 13 is equipped with a waste water treatment system, which treats 1 ton/hour of waste water generated by pre-treatment and degreasing in the workshop; The paint residue and sludge are dewatered, and the sludge filter press station 15 is also provided with a sludge tank 16 for storing the sludge generated by the sludge press filter station, and a sludge tank 16 for storing the wastewater generated during the coating process. Collection well 17.

There is a suspension conveying system 14 at the feeding station 1, and the wheel hub adopts the hole hanging type for feeding. The suspension conveying system 14 adopts the XT160 type touch-forging type suspension conveying chain, which is equipped with a single drive device, a tensioning device, a frequency conversion Speed control device, catenary lubrication adopts automatic spray lubrication, and there are many emergency stop buttons on the whole line. It can achieve 0.5-1.2m/min stepless speed change, improve the overall wheel painting efficiency for rail transit, and at the same time have high safety.

The production line is equipped with a coating waste gas, waste water and sludge treatment system. The waste gas and waste water generated during the coating process can meet the environmental protection discharge standards after treatment. Disposal has the advantages of good production environment and no pollution to the environment.

The steam heating system of the production line uses a temperature controller for automatic temperature control and automatic steam supply, pre-degreasing station temperature cleaning water temperature, degreasing station cleaning water temperature, hot water cleaning station water temperature, dehydration drying station temperature, paint drying station temperature All positions are displayed in a centralized digital display on the electric control cabinet, and automatic temperature control is realized by controlling the on-off of the steam solenoid valve.

Based on the above-mentioned rail transit integral wheel coating production line, the present invention also relates to a method for using the rail transit integral wheel coating production line, which is as follows:

Step 1. Place the monolithic wheel for rail transit on the suspension conveying system 14 with a cantilever crane at the loading station 1 to realize the loading of the monolithic wheel for rail transit. Spray cleaning is carried out at 2 degreasing stations. The cleaning water tank adds 20 ± 5 kg of degreasing agent according to the number of wheels, the cleaning water temperature is adjusted to 40-60 ℃, and the spray pressure is adjusted to 0.15MPa-0.25MPa. Rapid emulsification; after the pre-degreasing, the suspension conveying system 14 transports the integral wheels for rail transit to the degreasing station 3 for spray cleaning. The cleaning water temperature and cleaning pressure are the same as the pre-degreasing station 2, and the cleaning water tank is added according to the number of wheels. Degreasing agent 10±5㎏;

Step 2. The suspension conveying system 14 transports the whole wheel for rail transit to the hot water cleaning station 4 for hot water cleaning. The cleaning water temperature and cleaning pressure are the same as the pre-degreasing station 2. This station focuses on removing the pre-degreasing station. 2 and the degreasing agent remaining on the wheel surface at the degreasing station 3; after the hot water washing is completed, the suspension conveying system 14 transports the whole wheel for rail transit to the normal temperature ladle washing station 5 for ladle washing, and the ladle washing water temperature is 20±5 ℃, the pressure of ladle washing is the same as that of the two pre-degreasing stations, and 10±5㎏ of anti-rust agent is added to the ladle washing tank according to the number of wheels to prevent the wheels from rusting during hot water washing, ladle washing and dehydration drying stages;

Step 3. After washing with water ladle at room temperature, the suspension conveying system 14 transports the whole wheel for rail transit to the dehydration and drying station 6 for drying. The drying temperature is adjustable within the range of 50-165°C, and the temperature is automatically controlled. The system uses temperature sensors and digital display temperature controllers as control components, and realizes automatic temperature control by controlling the on-off of the steam solenoid valve; the exhaust gas generated during the drying process passes through the 5000m ³ /h air volume set at the leveling station 9 The activated carbon exhaust gas treatment system adsorbs and purifies the organic exhaust gas generated by the wheels;

Step 4. After the wheels are dehydrated and dried, the suspension conveying system 14 transports the integral wheels for rail transit to the first paint coating station 7, where the inner side of the wheel is painted at the first paint coating station 7, and then The suspension conveying system 14 conveys the integral wheel for rail transportation to the second paint coating station 8 to complete the coating of the outer side of the wheel. The spray booths at the first paint coating station 7 and the second paint coating station 8 are both scroll-type water curtain spray booths. It is composed of separator, water tank, return water channel, and air purification system. When working, most of the air containing paint mist is sprayed onto the front water curtain, which is absorbed by the water curtain, and a small part of the paint mist is attracted by the higher pressure fan. Under the action, it enters the suction plate at a high speed, and the paint mist is further captured by the water film of the suction plate under the action of centrifugal force. The return water channel flows to the front of the water tank, and the paint residue and sludge generated in the water tank are dewatered by the sludge filter press station 15, and then enter the sludge tank 16, and are finally transported by the qualified waste residue treatment unit for safe disposal. The filtrate is returned to the water collecting well 17 to avoid secondary waste dyeing, and the generated waste water is returned to the waste water treatment station 13 for treatment. In addition, exhaust gas devices are installed in the spray booth at the first paint coating station 7 and the paint coating second station 8, and the exhaust gas generated during the spraying process passes through the 5000m3/h air volume activated carbon set at the leveling station 9. The waste gas treatment system adsorbs and purifies the organic waste gas generated by the wheels, which improves the working environment of the sprayers. A 25000m ³ /h purification air supply system is also set up at the first station 7 of paint coating and the second station 8 of paint coating. It is composed of a secondary air purification and filtration system, and the micro-positive pressure control of the purified air supply volume is slightly larger than the exhaust air volume, which ensures the spraying quality of the workpiece;

After the wheel painting is completed, the suspension conveying system 14 transports the integral wheels for rail transportation to the leveling station 9, where the wheels are leveled for 10-15 minutes, and the station is equipped with an air volume of 5000 m ³ /h The activated carbon waste gas treatment system adsorbs and purifies the organic waste gas generated by the wheel dehydration and drying station 6, the first paint spraying station 7, the second paint spraying station 8, the leveling station 9 and the paint drying station 10;

Step 5. After the wheel leveling is completed, the suspension conveying system 14 transports the integral wheel for rail transportation to the paint drying station 10 for drying. The station adopts steam heating + electric infrared radiation auxiliary heating. The 6 dehydration and drying stations are the same, and the exhaust gas generated during the drying process is adsorbed and purified by the activated carbon waste gas treatment system with an air volume of 5000 m ³ /h set at 9 of the leveling station; after the wheel drying is completed, the suspension conveying system 14 The whole wheel for rail transit was transported to the strong cooling station 11 for cooling, where the air volume was 14000m ³ /h and the wind pressure was 650Pa, which accelerated the curing of the paint film. According to the process requirements, the wheel after strong cooling can be cut at the cutting station 12 or the second paint coating can be completed by repeating the above process.

The production line of the invention can coat all integral wheels for rail transit with an outer diameter of Φ650-1320mm, a single piece weight of 250kg-850kg, and the spoke types of straight spokes, inclined spokes, S type and double S type. Over 95% of the overall wheel paint on the market today.

The production line of the present invention adopts the form of assembly line operation. The suspension conveying system can perforate and hang the integral wheel for rail transit, and can paint the inner and outer sides of the integral wheel for rail transit at one time. The working system is 250 days/year, 8 hours/day It is calculated that 25,000 integral wheels can be painted annually, the wheel painting efficiency is more than 5 times that of traditional manual painting, and the painting cost is reduced to less than 50% of the manual painting cost.

The steam heating system of the production line of the present invention uses a temperature controller for automatic temperature control and automatic steam supply, pre-degreasing station temperature cleaning water temperature, degreasing station cleaning water temperature, hot water cleaning station water temperature, dehydration drying station temperature, paint drying station temperature The workstations are all digitally displayed on the electric control cabinet, and automatic temperature control is realized by controlling the on-off of the steam solenoid valve.

The present invention has been exemplarily described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements made by the technical solutions of the present invention are adopted, or the If the concept and technical solutions are directly applied to other occasions, they all fall within the protection scope of the present invention.

Claims (10)

1. A rail transit integral wheel coating production line, characterized in that: the coating production line is sequentially provided with a feeding station (1), a pre-degreasing station (2) for pre-processing the integral wheel, and a degreasing station. Station (3), hot water cleaning station (4), normal temperature ladle washing station (5), dehydration drying station (6), and the first paint coating station for painting the whole wheel ( 7), paint coating second station (8), leveling station (9), paint drying station (10), strong cooling station (11) and blanking station (12), coating production line There is also a wastewater treatment station (13) and a sludge press filter station (15). 2. A rail transit integral wheel coating production line according to claim 1, characterized in that: the pre-degreasing station (2), the degreasing station (3), the hot water cleaning station (4) and the normal temperature The water ladle washing station (5) is equipped with a spray system. The spray system includes a water tank and a spray pipe. The spray system adopts the downward and upward feeding method that can make the spray pressure uniform everywhere. The nozzle angle of the spray system can be adjusted. The spray pipe material is made of corrosion-resistant, temperature-resistant reinforced polypropylene material, the pressure of the spray pipe is adjustable, and the temperature in the water tank is controllable. 3. A rail transit integral wheel coating production line as claimed in claim 2, characterized in that: in the pre-degreasing station (2), the degreasing station (3) and the hot water cleaning station (4) Degreasing agent is added to the water tank, and rust inhibitor is added to the water tank of the water ladle washing station (5) at room temperature. 4. A rail transit integral wheel coating production line as claimed in claim 2 or 3, characterized in that: the furnace bodies at the dehydration drying station (6) and the paint drying station (10) are both Thick rock wool storage board assembly structure, the circulation pipeline in the furnace adopts the method of sending upward and returning air, the dehydration drying channel and the paint drying channel are equipped with infrared radiation heating device and steam heating device, and the dehydration drying channel and paint drying channel are equipped with There is also an exhaust gas discharge device in the channel, and the inlet and outlet of the dehydration drying channel and the paint drying channel are all insulated by air curtains. 5. A rail transit integral wheel coating production line according to claim 4, characterized in that: the paint coating first station (7) and the paint coating second station (8) are respectively opposite to the inside of the wheel. The side and the outer side of the wheel are painted, and the spray booths at the first paint painting station (7) and the second paint painting station (8) are both scroll-type water curtain spray booths. The curtain spray booth is mainly composed of a water curtain board, a suction board, a baffle air-water separator, a water tank, a return water channel, and a purification air supply system. The first paint coating station (7) and the second paint coating station ( 8) There is also an exhaust gas device in the paint spraying room. 6. The rail transit integral wheel coating production line according to claim 5, characterized in that: the leveling station (9) is provided with a leveling chamber, and an activated carbon adsorption system is provided in the leveling chamber, and the wheels are leveled. The time is 10-15 minutes, the activated carbon adsorption system is an activated carbon waste gas treatment system with an air volume of 5000 m ³ /h, the exhaust gas device at the dehydration drying station (6) and the paint drying station (10), and the first station for paint coating (7) and the exhaust gas device in the paint spraying chamber at the second paint coating station (8) are all connected with the activated carbon exhaust gas treatment system with an air volume of 5000 m ³ /h. 7. The rail transit integral wheel painting production line according to claim 6, characterized in that: the strong cooling station (11) is provided with a strong cooling chamber, and the air volume in the strong cooling chamber is 14000 m ³ /h, and the wind pressure is 650Pa. 8. A rail transit integral wheel coating production line as claimed in claim 7, characterized in that: the waste water treatment station (13) is provided with a waste water treatment system, and 1 ton/ton/ The sludge filter press station (15) is equipped with a filter press to dewater the paint residue and sludge generated in the water tank of the coating station, and the sludge filter press station (15) is also equipped with There is a sludge tank (16) for storing the sludge produced by the sludge press station, and a water collection well (17) for storing the waste water produced in the painting process. 9 . The rail transit integral wheel painting production line according to claim 1 , wherein a suspension conveying system ( 14 ) is provided at the loading station ( 1 ), and the wheels are loaded by a hole hanging type. 10 . The suspension conveying system (14) adopts the XT160 type touch-forging open suspension conveying chain, which is equipped with a single drive device, a tensioning device, and a variable frequency speed regulating device. 10. A method of using a rail transit integral wheel painting production line, characterized in that: based on the rail transit integral wheel painting production line described in any one of claims 1 to 9, the using method is: Step 1. Use a cantilever crane to place the whole wheel on the suspension conveying system (14) at the loading station (1), and the suspension conveying system (14) transports the whole wheel to the pre-degreasing station (2) for spraying For cleaning, add 20±5㎏ of degreasing agent to the cleaning water tank according to the number of wheels, adjust the cleaning water temperature to 40-60℃, and adjust the spray pressure to 0.15MPa-0.25MPa; Go to the degreasing station (3) for spray cleaning. The cleaning water temperature and cleaning pressure are the same as those at the pre-degreasing station (2). The cleaning water tank adds 10±5kg of degreasing agent according to the number of wheels; Step 2. After degreasing, the suspension conveying system (14) transports the whole wheel to the hot water cleaning station (4) for hot water cleaning, and then transports the whole wheel to the normal temperature ladle washing station (5) for cleaning. Ladle washing, ladle washing water temperature is 20±5℃, ladle washing pressure is the same as that of pre-degreasing station (2), ladle washing water tank is added with rust inhibitor 10±5㎏ according to the number of wheels; Step 3. The suspension conveying system (14) conveys the whole wheel to the dehydration and drying station (6) for drying. The drying temperature is adjustable in the range of 50-165°C. The automatic temperature control system adopts a temperature sensor and a digital display. The type temperature controller is used as a control element to realize automatic temperature control by controlling the on-off of the steam solenoid valve; the exhaust gas generated during the drying process passes through the activated carbon exhaust gas treatment system with an air volume of 5000m ³ /h set at the leveling station (9). The organic waste gas generated by the wheels is adsorbed and purified; Step 4. The dried integral wheel is transported to the first paint coating station (7), the inner side of the wheel is painted at the first paint coating station (7), and then transported to the first paint coating station (7). The outer side of the wheel is painted at the second station (8); after the painting is completed, the suspension conveying system (14) transports the integral wheel for rail transit to the leveling station (9), and the wheel is in the leveling station (9). ) for 10-15 minutes, and this station is equipped with a 5000m ³ /h air volume activated carbon waste gas treatment system to dehydrate and dry the wheels (6), the first paint spraying station (7), and the second paint spraying station ( 8), the organic waste gas produced by the leveling station (9) and the paint drying station (10) is adsorbed and purified; Step 5. After the wheel leveling is completed, the suspension conveying system (14) transports the integral wheel for rail transportation to the paint drying station (10) for drying, and the station adopts steam heating + electric infrared radiation auxiliary heating, This station is the same as the dehydration and drying station (6). The exhaust gas generated during the drying process is adsorbed and purified by the activated carbon exhaust gas treatment system with an air volume of 5000m3/h set at the leveling station (9); the wheel drying is completed. After that, the whole wheel is transported to the strong cooling station (11) for cooling, where the air volume is 14000m ³ /h and the wind pressure is 650Pa to speed up the curing of the paint film; the wheels after strong cooling can be placed in the blanking station (12) Cut the material at the place or repeat the above process to complete the second paint coating.

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