JPH0636896B2 - Ventilation system for painting aircraft in hangar - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a ventilation device for improving the environment during aircraft painting work.

[Background of the Invention and Conventional Problems]

Conventionally, aircraft painting work is performed with the aircraft stored in a heavy maintenance hanger (hangar) that performs multi-functional maintenance. The painting work of the machine body on this hanger takes a total of several days per machine, and maintenance work other than painting may be carried out simultaneously during this period. The painting is usually electrostatic painting. For this reason, during the coating work, the organic solvent gas and the coating particles are floated around the machine body or in the hanger, and the working environment of not only the coating worker but also other maintenance workers is significantly deteriorated.

Conventionally, maintenance hangers have adopted an appropriate natural ventilation method by opening a large door or a third type exhaust method by suctioning and exhausting from floor trenches around the fuselage. The third class exhaust system is a system that only exhausts air without forcibly supplying air by mechanical ventilation. Therefore, the air supply is natural air supply.

In the days when passenger aircraft were relatively small, even with these ventilation methods, it was possible to maintain the surrounding environment in a nearly satisfactory state with a certain amount of displacement. However, in the era of modern Jabot machines (DC-10, B-747, etc.), the length of the machine body is about 70 m, for example, and if you simply scale up using the conventional method, the displacement will be several hundred thousand meters. It can be ³ / H. For example, if ventilation is performed at an average wind speed of 0.3 m / sec from the upper side of the machine to the floor surface for a machine body length of 70 m and a machine body working width of 10 m, the ventilation air volume = 70 x 10 x 0.3 x 60 x 60 = 756000 m ³ / H, and the ventilation fan power becomes about 640KW. Ventilation equipment that requires such huge air volume and power is economically difficult to establish.

For this reason, at the time of painting work, although the emission surface of the organic solvent gas is very wide, the ventilation method by exhaustion of a small air volume by the third type ventilation or the air curtain formed by compressed air forms only the painting area. Have been adopted, such as by shutting off. However, neither method is effective enough for the ventilation of the solvent gas, and the solvent gas was inevitably diffused not only around the fuselage but also over the entire hanger.

On the other hand, in the organic solvent poisoning prevention method,
It is necessary to ventilate with a volume of air that is obtained by multiplying the projected area of the target object by a specific velocity of air (0.3 to 0.5 m / sec), or to obtain a specific volume of air according to the amount of solvent used and to meet a certain standard. Stipulates that It has been difficult to meet this requirement at the time of painting work of a large aircraft on the current maintenance hanger because it has been described above.

[Object of the Invention]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems when painting a large aircraft. More specifically, the environment for painting the aircraft in the hanger is reduced by equipment,
It provides ventilation maintenance with a push-pull effect that saves energy. Ventilation is performed by freely ventilating the entire fuselage or intensive ventilation in accordance with the actual conditions of the coating work process. It is intended to provide equipment that can achieve zoning, and by doing so, it is intended to achieve an environment improvement at the time of painting in a hanger while saving equipment and energy.

[Structure of Invention]

The present invention relates to a ventilation device for painting an aircraft housed in a hanger, in which a plurality of air outlets for blowing air downward are continuously provided along a direction of an aircraft fuselage on a ceiling part inside the hanger. Each of the air outlets is connected to an air supply duct connected to an upstream side of an air supply fan with an adjustable air volume, and a damper that can be operated remotely between the air supply duct and the majority of the air outlets. So that a plurality of exhaust ports are provided below the fuselage of the aircraft along the fuselage, and each exhaust port is connected to the exhaust air duct via a damper so that ventilation can be performed zone by zone. A plurality of air jet nozzles for assisting the push-pull effect were connected to both sides of the aircraft fuselage along the fuselage, and each air jet nozzle was connected to the fan unit via ducts. And butterflies.

Further, in the equipment of the present invention, preferably, curtains are provided on both sides of the aircraft fuselage and outside the air jet nozzle along the outer fuselage.

That is, the present invention, when painting the aircraft in the hanger,
The first-class ventilation provides economical equipment that can sufficiently satisfy the requirements of the above-mentioned organic solvent poisoning prevention law, and can properly perform ventilation zoning in a huge maintenance hanger. It was done like this. First
Seed ventilation is a ventilation system in which a ventilation zone is forcibly supplied by mechanical ventilation and at the same time forced exhaustion is performed from the zone. According to the present invention, a large number of air outlets with dampers that can be remotely controlled along the fuselage of the aircraft are connected to the ceiling of the hanger to perform downflow forced air supply over the entire length of the fuselage or only at necessary locations. Along with the use of an air supply fan with adjustable air volume, the overall air supply amount is controlled, and by providing a number of air outlets at the lower part of the fuselage along the fuselage, the entire length of the lower part of the fuselage or the required location. By using forced exhaust from just one side, and by installing a number of air jet nozzles along the fuselage on both sides of the fuselage (there are many work platforms or docks for aircraft maintenance, these docks) It is characterized in that the flow of ambient air is controlled by the jet air from a jet nozzle, which allows controlled ventilation of the first kind. Those were Unishi.

At that time, the air supply from each air outlet on the ceiling can be temperature-controlled air, and for this reason, it is necessary to send the air whose temperature is controlled by the cold / hot water coil to each air outlet. Good. As a result, heated air can be supplied to the ventilation zone in the winter and cooled air in the summer. Regarding the exhaust port provided below the body, a trench under the floor is used as the exhaust air duct, and each exhaust port is connected to or installed in the exhaust air duct of this trench.

If curtains are provided outside the air jet nozzles on both sides of the body, it will be very effective for ventilation because the painting space can be divided into certain areas in a huge space. However, if it is difficult to install due to restrictions on the installation position and maintenance work, it is not necessary to install it. This is because the push-pull effect is assisted in the vicinity of the body by the method of the present invention in which the air near the body is attracted and conveyed by the air jet nozzle, diffused, and guided to the exhaust port, and ventilation in the vicinity is sufficiently performed. When a curtain is provided, it is preferable to use a hanging curtain, and when it is not possible to hang the curtain below the wings of the airframe, a partition curtain should be provided in this part.

A large number of air jet nozzles installed along the fuselage on both sides should be installed such that the direction of the air injected from this nozzle is downward and that the air jets are inclined away from the aircraft fuselage. . The downward air jet nozzle promotes a push-pull effect in the vicinity of the fuselage of the aircraft when the air blown from the air outlet of the ceiling flows toward the air outlet of the floor. In addition, the one tilted away from the fuselage of the aircraft (slightly downward tilted to the outside) has a high-speed jet of stagnant air accumulated from the nozzle near the aircraft and the workbench (dock). The induced agitation action of the jet stream promotes ventilation at that position by transporting it from that position to another position.

Compressed air is supplied from the fan volks installed outside the ventilation zone to each of the air jet nozzles that perform such air flow control. As a result, the power machine for air flow control can be removed from the ventilation zone, and the risk of ignition can be eliminated even in an environment in which organic solvents float.

The ventilation device of the present invention will be specifically described below with reference to the embodiments of the drawings.

FIG. 1 is an illustrative view of the entire ventilation equipment according to the present invention when painting a large aircraft stored in a maintenance hanger as seen from the front of the aircraft, and FIG. 2 is a view of the equipment from one side of the aircraft. It is the illustration figure of the whole seen. A number of docks for various maintenance are installed along the airframe in the hanger, but these docks are omitted because the drawing becomes complicated. In the illustrated example, the aircraft 1 is placed above the trench 2 provided under the floor in the hanger so that the center line of the airframe substantially coincides with the center line of the trench 2.

In the facility of the present invention, a large number of air outlets 3 are provided on the hanger ceiling.
Are continuously provided in a direction along the body of the machine body 1. Each air outlet 3
Is connected to the main air supply duct 4 via a short branch duct 5 (FIG. 1). In the illustrated example, as shown in FIG. 1, the air supply ducts 4 are arranged in parallel in two rows along the body of the machine body 1. The majority of air outlets 3 have dampers 6 behind them. That is, the damper 6 is provided between the main air supply duct 4 and the air outlet 3 (branch duct 5). This damper 6 is an air cylinder type damper that can be operated remotely, and by controlling the opening and closing of each separately, it is possible to control the number of operating air outlets, which allows, for example, a large airframe over 70 m. It is possible to supply air to 1 as a whole or to only a part of an arbitrary position.

The air conditioner 7 is installed at an appropriate position in the hanger.
The air conditioner 7 is a unit in which a fan 8, a hot / cold water coil 9, and a filter 10 are housed in a box, and the outside air is taken into the unit from an outside air intake 11 and sent to the air supply duct 4. I care. The air volume adjustable fan 8 uses an axial flow fan of a variable pitch blade, and the air volume can be controlled by controlling the pitch angle of the blade. Instead of this, a centrifugal fan may be used, and the air flow rate may be controlled by controlling the rotation speed by inverter control. In this way, the amount of air sent to the air supply duct 4, that is, the total amount of air blown from the entire air outlet 3 to the ventilation zone can be controlled. Hot and cold water is passed through the cold and hot water coil 9 in winter and cold water in summer. Thereby, the environmental temperature of the ventilation zone can be controlled.

By using the air supply equipment configured as described above, it is possible to arbitrarily adjust the downflow air supply toward the fuselage of the airframe 1 over the entire length of the airframe or only to an arbitrary position of a part thereof.

On the other hand, the exhaust is a large number of exhaust ports provided below the fuselage body.
Start from 13. In the illustrated example, the trench 2 is used as the exhaust air passage,
An exhaust port 13 is provided in series with the trench 2. In the past, it was common to avoid the aircraft from riding on the trench due to strength problems, and the trench was placed on a side far away from the parking position of the aircraft. One feature of the present invention is that the exhaust port is provided directly below the body of the machine body along the machine body. Therefore, the trench 2 is effectively used as an exhaust air duct. In other words, by providing an exhaust port just below the center of the fuselage body, which has an egg-shaped cross section, and by providing an air jet nozzle midway between the air outlet and the exhaust port,
A push-pull airflow pattern can be created that guides the air that has descended on both sides of the airframe to the exhaust port directly below the center of the airframe body, and an integrated airflow with less diffusion into a huge space can be formed.

When the exhaust port 13 is installed in the trench 2, openings are provided at predetermined intervals on the lid surface of the trench 2 (surface corresponding to the hanger floor surface), and a short air passage that connects the opening and the space inside the trench is installed. It is good to install the damper 14 in this short wind passage. Like the damper 6 on the air supply side, the damper 14 can also be controlled remotely by using an air cylinder type damper so that the number of operating exhaust ports 13 can be controlled. The exhaust air duct 2 of the trench is connected to an exhaust fan box 16 by an exhaust duct 15. A limit load type fan 17 and an auto air filter 18 are housed in the exhaust fan box 16. Limit Road Type Juan 17
By using, it is possible to obtain stable performance against adhesion of paint mist and dust. Also this Juan
The air volume is controlled by controlling the number of rotations of 17 by an inverter. In addition, the auto air filter
After removing the paint mist and dust as much as possible by 18, the exhaust gas is guided to the outdoor exhaust air exhaust port 19 and exhausted to the outdoor air. The exhaust damper 1 installed at each exhaust port 13
4, Furthermore, the air supply damper 6 installed at the air outlet 3 described above is installed at a place where daily maintenance is difficult, so a damper that can be operated remotely is used.
The operation uses a structure that operates by air. This is because there is a risk of ignition due to sparks with electrically operated products because flammable paint solvents are entrained in the air.

As described above, according to the present invention, the nose portion of the fuselage body,
First-class ventilation that can perform ventilation for each zone by forming a downflow ventilation flow in any of the main wing, center, tail, etc., and allowing free control of the air supply and exhaust locations. It is a system.

A large number of air jet nozzles 21 for controlling the flow of airflow are arranged near the machine body (near the dock). This air jet nozzle 21 is a nozzle for injecting compressed air, and by injecting a small amount of compressed air from this nozzle 21, ambient air in the vicinity of this nozzle 21 functions as an attracting stirring means in the injecting direction. is there. The air injection direction of the nozzle 21 is such that some of them promote up and down push-pull airflow as a downflow direction, and some of them expel solvent and paint particles floating near the machine away from the machine. In order to carry it away as quickly as possible, tilt it slightly from horizontal to downward in the direction away from the aircraft. Each air jet nozzle 21 is connected to air supply ducts 22 arranged along both sides of the machine at a predetermined interval, and compressed air is supplied from the fan unit 23 to the air supply ducts 22. To be done. The fan unit 23 sucks the air in the hanger and supplies it to the air supply duct.
Inhale to 22. In the example shown in the figure, two long air supply ducts 22 are arranged in parallel on both sides of the fuselage excluding the tail part, and the tail part also has two different upper and lower air supply ducts 22. Is provided, and a large number of air jet nozzles 21 are connected to each air supply duct 22 at predetermined intervals. During painting, as a general rule, air is jetted from all of the air jet nozzles 21 to attract / stir the solvent and paint floating in the vicinity of the machine body. That is, for example, even when only the nose portion is being concentrated and painted, air is jetted not only from the nose portion but also from the air jet nozzles 21 in other zones, so that a solvent or the like may be discharged near the fuselage. Prevent floating. As a result, a good working environment other than painting is maintained in the vicinity of the machine body, and contamination of equipment and the like due to scattering of paint mitos is prevented. In this way, the air jet nozzle 21
Another major feature of the present invention is that the air flow is properly controlled (the attraction of the air and the solvent and paints entrained therein and the agitation) by appropriately arranging.

Further, in order to prevent the downflow to the fuselage body portion from spreading to the huge space in the hanger as much as possible, it is also preferable to provide curtains on both sides of the fuselage body in the equipment of the present invention. In the illustrated example, hoisting type electric curtains 25 (FIG. 1) hung from a dock existing in a hanger in the illustrated example are installed on both sides of the machine body 1 and outside the air jet nozzle 21. It is large enough to hang down to the floor of the hanger. In a large model, the length of the body is also long, so this hanging curtain 25 is installed with its width divided into several parts. Regarding the main wing portion, the hanging curtain 25 can be hung up to above the seed wing, but it is difficult to hang it below the main wing, so a partition curtain 26 is provided below the main wing. The partition type curtain 26 is a portable type, and is removed when the painting work is completed, and the hanging curtain 25 is rolled up and stored.

[Advantageous effects of the invention]

As described above, according to the present invention, the environment inside the hanger and the working environment in the painting work of an aircraft are remarkably improved, and the requirements prescribed by the Organic Solvent Poisoning Prevention Law can be sufficiently satisfied even in the painting work space.

In addition, the painting work of the aircraft may be a full painting or a partial painting, and depending on the painting work contents, the painting spots are strip-shaped over the entire length or concentrated on the tail part, which is very diverse. For this reason, spraying from the spray gun for painting may be concentrated from both the left and right sides of the fuselage or dispersed throughout the fuselage, but according to the equipment of the present invention, air is supplied and exhausted on average over the entire fuselage. It is also possible to ventilate the area, or to freely zone-ventilate only that area depending on the work situation. The position and air volume control of this zone ventilation can be easily performed by opening / closing control of the air supply damper 4 of each air outlet 3 and the exhaust damper 14 of each exhaust port 13 and air volume control of the air supply fan 8 and the exhaust fan 17. The control panel for such control can be installed in the hanger and operated.

The fact that the zone ventilation can be performed means that the air supply and exhaust in the non-working area can be stopped, and therefore the ventilation air volume can be reduced, so that economical ventilation is achieved. However, even in the case of partial air supply / exhaust, by injecting a jet of compressed air from the entire air jet nozzle 21 with a small amount of air flow, ventilation in the dock can be promoted, so painting work is performed. It is possible to maintain a clean environment not only in the parts but also in the surroundings of the aircraft where the painting work is not performed.

Further, since the facility of the present invention can freely adjust the air temperature in the working environment region, the working environment can be improved in this respect as well, and the ventilation facility of the present invention itself interferes with the work other than the painting work. There is virtually no such thing, and even if the size of the aircraft is different, the ventilation zone can be controlled accordingly, so it can be said that this is a very flexible facility.

[Brief description of drawings]

FIG. 1 is an overall layout view of the equipment of the aircraft painting ventilation equipment of the present invention viewed from the front of the aircraft stored in the hanger, 2
The figure is an overall layout of the equipment of the same equipment seen from one side of the aircraft. 1 ... Aircraft, 2 ... Exhaust air passage, 3 ... Air outlet, 4
...... Main air supply duct, 5 ...... Branch duct, 6 ...... Remotely controllable damper, 7 ...... Air conditioner, 8 ...... Variable air supply fan, 9 ...... Cold and hot water coil, 13 ...... Exhaust port, 14 ...... Exhaust damper, 16 …… Fun filter unit,
17 …… Variable flow exhaust fan, 18 …… Filter, 21 …… Air jet nozzle, 22 …… Compressed air supply duct, 23…
… Juan unit, 25 …… Hanging curtain, 26 …… Partition curtain.

Front Page Continuation (72) Inventor Toshio Murata 5-23-14 Higashiyukiya, Ota-ku, Tokyo (72) Inventor Akira Takenaka 1-7-11-11003 Shinmori, Asahi-ku, Osaka-shi, Osaka (72) Haruo Harada 5-3-34 Komatsubara, Wakayama City, Wakayama Prefecture (72) Inventor Noboru Ochiai 717-23, Hisadera House, Abiko City, Chiba Prefecture

Claims (5)

[Claims] 1. A ventilation device for painting an aircraft housed in a hanger, wherein a plurality of air outlets for blowing air downward are continuously provided in a ceiling part of the hanger along a direction of an aircraft fuselage. , Each of the air outlets is connected to an air supply duct connected to an upstream side of an air supply fan capable of adjusting the air volume, and remote control is possible between the air supply duct and the majority of the air outlets. A large number of exhaust ports are provided along the fuselage below the aircraft fuselage, and each exhaust port is connected to the exhaust air duct via the damper for ventilation in each zone. The air jet nozzles are connected to both sides of the aircraft fuselage along the fuselage with a number of air jet nozzles for promoting the push-pull effect, and the air jet nozzles are connected to the fan unit via ducts. This And wherein, painting ventilator hanger in the aircraft. 2. The ventilation device according to claim 1, wherein the exhaust air passage is a trench under the floor. 3. The air jet nozzle according to claim 1, wherein a part of the air jet nozzle is installed so as to inject an air flow downward, and a part of the air jet nozzle is installed so as to inject an air flow in a direction away from an aircraft fuselage. The ventilation device according to item 1 or 2. 4. The ventilation device according to claim 1, 2 or 3, wherein the air outlet on the ceiling is an outlet for temperature-controlled air. 5. A ventilation device for painting an aircraft housed in a hanger, wherein a plurality of air outlets for blowing air downward are continuously provided in a ceiling part of the hanger along a direction of an aircraft fuselage. , Each of the air outlets is connected to an air supply duct connected to an upstream side of an air supply fan capable of adjusting the air volume, and remote control is possible between the air supply duct and the majority of the air discharge ports. A large number of exhaust ports are provided along the fuselage below the aircraft fuselage, and each exhaust port is connected to the exhaust air duct via the damper for ventilation in each zone. A plurality of air jet nozzles for assisting the push-pull effect are connected to both sides of the aircraft fuselage along the fuselage, and each air jet nozzle is connected to the fan unit via ducts. 、 So And a curtain provided on both sides of the fuselage of the aircraft and outside the air jet nozzle along the fuselage.