CN203281489U - Negative pressure environment-friendly car baking finish house - Google Patents

Abstract

The utility model belongs to the technical field of production maintenance coating and gas pollution control. Solve the problem of uneven paint quality in various parts of the car surface caused by uneven heating in the current car paint booth, as well as the pollution problem caused by the leakage and direct discharge of harmful exhaust gas in the paint booth. A negative pressure environment-friendly car paint booth is mainly composed of a paint booth body, a heating system, a control system, a lighting system, a safety system, a hot air circulation diffusion and convection system, and an air extraction and purification system. The hot air circulation diffusion and convection system can effectively increase the heating uniformity of the painted parts, so that the quality of the paint on the surface of the car is uniform. The air extraction and purification system can create a favorable negative pressure environment in the paint room and solve the problem of leakage of harmful exhaust gas in the paint room; processing the extracted harmful exhaust gas through the air purification device can effectively solve the pollution problem caused by the direct discharge of harmful exhaust gas.

Description

A negative pressure environment-friendly car paint booth

technical field

The utility model relates to a negative pressure environment-friendly car paint booth, which can solve the pollution problem caused by the leakage of harmful exhaust gas and direct discharge in the paint booth, and can also increase the uniformity of the paint quality on the surface of the car, belonging to production maintenance painting and gas pollution. In the field of control technology, it can be widely used in the automotive industry.

Background technique

In recent years, my country's automobile industry has developed rapidly, especially in the field of automobile production, maintenance and painting. Automobile paint booths have gradually emerged in every corner of the city. When the paint booths are working, they will produce a large amount of harmful exhaust gas, which seriously pollutes the surrounding environment and endangers people's health.

When the existing automobile paint booth is in operation, the gas in the paint booth body expands due to the influence of high temperature, so that the air pressure in the paint booth body is higher than the outside, resulting in a positive pressure difference. Under the action of the positive pressure of the gas inside the paint booth body, the harmful exhaust gas is squeezed out of the paint booth body to cause leakage. The outward diffusion of harmful exhaust gas will cause the deterioration of air quality, seriously endanger the health of operators, and affect the normal life of surrounding residents. On the other hand, the heating system located at the bottom of the paint booth body will make the lower gas in the paint booth body heat up rapidly, while the upper gas temperature is still relatively low, and the temperature in the paint booth body is uneven. Due to insufficient hot air flow, As a result, the surface of the car is heated unevenly during the paint-baking process, resulting in uneven paint quality on various parts of the car surface, and even brittle cracks. Therefore, it is of great significance to study a new type of environmental protection negative pressure car paint booth to effectively eliminate harmful exhaust gas pollution and improve the quality of car paint.

Utility model content

Aiming at the disadvantages of the above-mentioned existing equipment and technologies, the utility model designs a negative pressure environment-friendly car paint booth, which solves the pollution problems caused by the leakage of harmful exhaust gas in the paint booth body, the direct discharge of harmful exhaust gas, and the paint surface of the car surface. Fixed quality issues.

The new technical solution adopted by the utility model to solve the above problems is: to design a negative pressure environment-friendly car paint booth, which is mainly composed of a paint booth body, a heating system, a lighting system, a safety system, a control system, and hot air circulation and diffusion. It is composed of a convection system and an air extraction purification system. The heating system is installed inside the main body of the painting room, located at the bottom of the main body of the painting room and the lower part of the walls on the left and right sides, and is composed of multiple infrared heating lamps; The intersection direction of the side wall is evenly laid, and it is composed of a number of sub-white high temperature resistant explosion-proof lamps; the safety system includes a safety pressure relief door, leakage protection and safety devices in the circuit; the control system includes a temperature sensor located in the paint room body, PLC constant temperature controller and control circuit for intelligent control of heating system, lighting system, safety system, hot air circulation diffusion and convection system, and exhaust purification system; hot air circulation diffusion and convection system are installed on the left and right sides of the paint booth On the side wall, it is composed of high temperature resistant fan, return air exhaust pipe and air supply exhaust pipe. Two high-temperature resistant fans are respectively installed on the top of the walls on the left and right sides of the main body of the paint-baking room. Lay in the same direction, with a certain distance from the lamp tube of the lighting system; the air supply pipe is connected with the exhaust port of the high temperature resistant fan, and is laid horizontally along the ground; the return air pipe and the bus of the air supply pipe are processed with uniform and dense Air hole; the air extraction and purification system is installed on the top outside the paint booth body, and consists of an air extraction pump and an air purification device. The air pump is installed on the top of the paint booth body, and is automatically controlled by the measurement and control device. The suction port of the air pump is located inside the paint booth body, and the exhaust port is connected to the air purification device; the air purification device is a combination device of three-stage filtration and purification, including Water mist washing layer, high-efficiency active molecular sieve layer and mineral wool filter layer.

The beneficial effects of the utility model are: when the paint booth is working, on the one hand, the air pump automatically controlled by the measurement and control device will slowly extract a certain flow of harmful waste gas from the body of the paint booth to keep the gas pressure in the paint room slightly It is lower than the outside, forming a pressure difference, creating a favorable negative pressure environment for the inside of the paint booth. When the air pressure inside the paint booth body is lower than that outside the paint booth body, the harmful exhaust gas inside the paint booth body will no longer leak out due to the positive pressure of the gas outside the paint booth body, thus effectively solving the problem of harmful exhaust gas leakage. The harmful exhaust gas extracted by the air pump from the body of the paint baking room is forced to be transported to the air purification device. First, it is washed by the water mist system to cool and dissolve some harmful substances in the harmful exhaust gas. Finally, the high-temperature filter cotton is used to filter and remove dust until the harmful exhaust gas is purified into clean air before being discharged, thus solving the pollution problem caused by the direct discharge of harmful exhaust gas; on the other hand, under the action of a high-temperature resistant fan, the paint The lower-temperature airflow in the upper layer of the room body is evenly inhaled by the air suction holes on the return air exhaust pipe, and then re-sent into the paint baking room body from the bottom through the air jet holes on the air supply exhaust pipe, so that the original cold and hot air in the paint baking room body The uneven gas is effectively mixed evenly, so that the temperature in the paint booth body can be uniform in a short time, and the heating uniformity of the paint on the surface of the car can be effectively increased. Due to the high-temperature-resistant fan circulation, it can also realize the circulation, diffusion and convection of the hot air in the paint booth body.

Finally, the quality of baking paint on all parts of the car surface is uniform. The design of air extraction purification system and hot air circulation diffusion and convection system is not only beneficial to the health of operators and surrounding residents, but also can meet the development needs of the automobile production and maintenance industry with more environmental protection and excellent quality.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the utility model paint booth.

Fig. 2 is a schematic diagram of the structure of one side of the hot air circulation diffusion and convection system of the utility model.

In the figure: 1-air purification device; 2-exhaust pump; 3-high temperature resistant fan; 4-baking paint room body; 5-heating system; 6-hot air circulation diffusion and convection system; Air suction hole; 9-air supply pipe; 10-jet hole;

Detailed ways

The specific working process of the negative pressure environment-friendly car paint booth will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, when the paint booth is working, the temperature of the lower layer in the paint booth body 4 is relatively high, and the temperature of the upper layer is relatively low. All parts of the car surface are heated unevenly. After the hot air circulation diffusion and convection system 6 is set, under the action of the high temperature resistant blower fan 3, the relatively low temperature gas on the upper layer of the paint booth body 4 is evenly inhaled through the air suction hole 8 of the return air exhaust pipe 7, and then the air is sent to The air jet hole 10 of the air exhaust pipe 9 is re-sent into the paint booth body 4 from the bottom of the paint booth body 4, so that the originally unevenly cold and hot gas can be effectively mixed evenly, so that the temperature in the paint booth can be uniform in a short time, and the heat can be realized. The air circulation diffuses and convects, thereby effectively increasing the heating uniformity of the painted parts, so that the quality of the painted parts on the surface of the car is uniform. A certain flow rate of harmful exhaust gas is extracted from the paint booth body 4 through the air pump 2, and the amount of air extraction is automatically constant by the measurement and control device, so that the gas pressure in the paint booth body 4 is always kept slightly lower than the outside, forming a pressure difference for the paint A favorable negative pressure environment is created in the room body 4 . When the gas pressure in the paint booth body 4 is lower than that of the outside, the harmful exhaust gas in the paint booth body 4 will no longer leak out due to the promotion of the positive pressure of the external gas. The harmful exhaust gas extracted by the air pump 2 is discharged after being treated by the special air purification device 1 .

Claims (3)

1. a negative pressure and environment protection type finish-baking room for automobile, mainly be comprised of combined padding and drying system body, heating system, illuminator, security system, control system, hot air circulate diffusion and convection system and the cleaning system of bleeding; It is characterized in that, described heating system is arranged on the combined padding and drying system body interior, is positioned at the bottom of combined padding and drying system body bottom and left and right sides wall, a plurality of infrared heating fluorescent tubes, consists of; Described illuminator is arranged on the combined padding and drying system body interior, along the intersection direction of combined padding and drying system body roof wall and left and right sides wall, evenly lays, and the white high temperature resistant explosion-proof fluorescent tube in a plurality of Asias, consists of; Described security system comprises earth leakage protective and the safeties in safety relief door, circuit; Described control system comprises the control circuit that is positioned at the intrinsic temperature sensor of combined padding and drying system, PLC radiator valve and heating system, illuminator, security system, hot air circulate diffusion and convection system, the cleaning system of bleeding is realized Based Intelligent Control; Described hot air circulate diffusion and convection system is positioned on the wall of the combined padding and drying system body left and right sides, and the described cleaning system of bleeding is positioned at this external top of combined padding and drying system.

2. negative pressure and environment protection type finish-baking room for automobile according to claim 1, is characterized in that, has hot air circulate diffusion and convection system, and described hot air circulate diffusion and convection system mainly comprises two resisting blowers, return air comb and air-supply comb; Described resisting blower is arranged on respectively on the tip position of left and right sides wall in the combined padding and drying system body; Described return air comb is connected with the air entry of resisting blower, along the direction of roof wall and side wall wall intersection, lays, and with the fluorescent tube of illuminator, certain distance is arranged; Described air-supply comb is connected with the exhaust outlet of resisting blower, along ground level, lays; Be processed with the pore that evenly gathers on the bus of described return air comb and air-supply comb.

3. negative pressure and environment protection type finish-baking room for automobile according to claim 1, is characterized in that having the cleaning system of bleeding, and the described cleaning system of bleeding mainly comprises aspiration pump and air cleaning unit.Described aspiration pump is arranged on the combined padding and drying system bodies top, by measure and control device, is automatically controlled; Described air cleaning unit is connected with aspiration pump, and the composite set for three-stage filtration purifies, comprise water smoke scrubber layer, high-efficiency activated molecular sieve layer and mineral wool filter course.

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