JPH0370680B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to an airplane washing apron with an airplane walkway, pipe and nozzle means for cleaning airplanes with de-icing fluid, and drainage for collecting and carrying away the de-icing fluid. and a discharge means.

[Conventional technology]

In this type of deicing device, for example the device disclosed in Swedish Patent Specification No. 7713619-0,
An apron with a walkway is capable of resisting excessive loads by airplanes and causing the airplane wing tips to swing and be damaged, for example, by contact with cleaning or scrubbing equipment placed in the vicinity of various airplane parts. The configuration must be such that the aircraft can be moved into position without any possible hindrance.

At the same time, the equipment used to collect and carry away the large quantities of de-icing fluid that run down from the airplane onto the apron area must be highly effective without unduly impeding the smooth forward motion of the airplane. Additionally, in many weather conditions, if used de-icing fluid is not removed quickly, dense fog will form, and such fog can also be a nuisance to airfield aircraft components located in the vicinity of the de-icing station. It has been found that

[Problem to be solved by the invention]

As mentioned above, there is a need in prior art systems to improve the de-icing system so that it does not interfere with parts of the airplane and the forward movement of the airplane, and to improve the formation of dense fog by the de-icing fluid.

The object of the invention is to provide a device in which the above-mentioned disadvantages can be almost completely avoided in a simple and inexpensive manner.

[Means to solve the problem]

The above object, according to the present invention, consists of a substantially flat surface layer of a road surface material permeable to liquids and an impermeable layer adapted to collect and carry away the deicing fluid and sloped towards the drainage pipe. This is accomplished by cleaning the tarmac.

In the case of an apron so constructed,
The de-icing fluid flowing down onto the generally flat surface layer passes directly through the generally flat surface layer, such that the device for collecting and carrying away the de-icing fluid is placed below the surface layer; As a result, it consists of a planar shape.

This construction of the tarmac also offers the important advantage that the drain 15 can be connected to a pump arranged to remove water vapor from the liquid-permeable surface layer by wicking. In this way, water vapor is prevented from rising over a large area from the aircraft washing apron and reaching the aircraft in the form of a vapor cloud, which is relevant to processing performance and in busy and crowded airfields. There are considerable benefits related to overall visibility. The surface layer also serves as a coarse filter in which leaves, twigs, etc. can remain. The suction pump is therefore switched to a mode in which air is momentarily blown upwards through the drain and through the outer surface, so that any foreign matter present can be blown free from the channels and passageways of the surface layer. can. Preferably, the cold atmosphere or suitably cooled air is
It is blown through the passageway for a suitable length of time just before commencing the de-icing process, which typically completes in minutes.
This provides the benefit of cooling the surface layer and drain/discharge pipes to an extent sufficient to cool the water vapor drawn through the surface layer throughout the de-icing process;
As a result, the water contained in the steam condenses before the steam reaches the pump in the machine room.

In the following, the invention will be explained in detail in conjunction with the accompanying drawings.

The drawing shows an elongated rectangular aircraft washing apron 1, which is suitably located directly on the aerodrome from the aircraft approach path leading from the aerodrome building to the runway. The apron 1 has a width slightly greater than the largest aircraft wingspan that can be expected to handle, and extending across the apron is a portal frame 2, which Positioned so that an airplane 4 rolling on a tarmac 1 can pass through a portal frame with nozzles placed at a predetermined distance from various parts of the airplane, in particular from the upper and lower surfaces of the airplane wings. pipe and nozzle 3
It is equipped with Located on one side of the portal frame is a surveillance cabin 5. Located adjacent to the monitoring cabin 5 is a partially buried machine room 6 into which extends a pipe 3 equipped with the above-mentioned spray nozzles.

The apron 1 consists of three different layers: a bottom support layer 10, placed on top of the support layer 10 and made of a liquid-impermeable material such as concrete;
an impermeable layer 11 which slopes sharply from both sides of the center line of the tarmac 1, and finally a surface layer 12 consisting of a liquid permeable material such as a road surface material, e.g. drainage asphalt and having a substantially flat surface. It is composed of

The liquid permeable material is a hot mixed (150-170 °C) asphalt concrete with 15-20% cavity and approximately 60% ballast material of the maximum ballast portion, and fiber additives that increase the compressive strength of the material and its life length. be.

The drain pipe 15 is connected to the impermeable layer 11 around the apron 1.
embedded in the longitudinal edges of the resulting surface layer 12
All liquid that permeates through and flows down along impermeable layer 11 is collected in drain pipe 15.

The drain pipe 15 is connected to the machine room 6 by a discharge pipe 16. The mechanical vertebra 6 has an airplane portal frame 2.
It houses an apparatus consisting of pumps, tanks, filters, valves, etc. for siphoning under high pressure a water-glycol mixture of varying concentration as it is slowly moved through the pipe 3 and into the nozzle. All surfaces of the aircraft are contacted by liquid jets according to a predetermined program, when ice and snow are melted and washed off the aircraft and fall with the de-icing fluid onto the apron 1, thereby causing this The deicing fluid and melted snow and ice form the surface layer 12
through the impermeable layer 11 and from there through the drain pipe 15 and the discharge pipe 16 to restore and strengthen the deicing fluid to the desired concentration for siphoning it back into the pipes 3 and nozzles of the portal frame 2. Enter machine room 6.

The machine room 6 also houses a large capacity vacuum pump connected to the discharge pipe 16, which is adapted to draw a flow of air downward through the surface layer 12. Otherwise, the cloud of water vapor drawn from the tarmac 1 and from the relatively warm deicing fluid in cold weather is drawn through the drain and discharge pipes 15, 16, which is an important result of the present invention.

The portal frame 2 need not be of immovable construction, but may be arranged for movement in the longitudinal direction of the apron 1, in which case the aircraft can also be fixed during the de-icing process.

In summary, the invention provides an airplane washing apron 1 on which an airplane can be moved, means 3 for spraying the airplane with de-icing fluid, and means 11, 15 for collecting and carrying away the de-icing fluid. , 16.

In order to quickly and reliably remove de-icing fluid from the tarmac, the tarmac is equipped with a generally flat surface layer 12 of so-called drained asphalt, through which the de-icing fluid is collected and conveyed downwardly. As shown in FIG. The apparatus also preferably includes a pump arranged to draw air downwardly through the surface layer 12 so as to carry away the water vapor that has formed and to prevent the formation of vapor clouds that tend to rise from the tarmac 1.

[Brief explanation of drawings]

The drawing is a partial sectional view showing an embodiment of the deicing device according to the present invention. Explanation of the code, 1...Airplane washing apron, 3...
pipe (and nozzle means), 4... airplane, 7
... pump, 11 ... impermeable layer, 12 ... surface layer, 15 ... drain pipe, 16 ... discharge pipe.

Claims (1)

[Claims] 1 an airplane washing apron 1 supporting the airplane 4 and integrating with the airplane aisle; pipe and nozzle means 3 for cleaning said airplane 4 with de-icing fluid; and drainage and discharge means 1 for collecting and draining said de-icing fluid.
5, 16, wherein said apron 1 comprises a substantially flat surface layer 12 constituted by a liquid-permeable road surface material such as drained asphalt for contact with the aircraft 4; and said de-icing system. An aircraft deicing device characterized in that it comprises an impermeable layer 11 below the surface layer 12 that slopes toward a drain pipe 15 for collecting and draining fluid.