JPS6259198A - Aircraft deicer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an airplane de-icing system of the type comprising an airplane washing apron with an airplane walkway, means for cleaning the airplane with treatment liquor, and means for collecting and carrying away the treatment liquor. 0 In a deicing device of this type, for example the device described in Swedish patent specification no. configured to allow the aircraft to be moved into position without any disturbance which may be damaged, for example by contact with cleaning or scrubbing equipment placed in the vicinity of various aircraft parts; must be done.

At the same time, the equipment used to collect and carry away the large quantities of process liquor that run down from the airplane onto the apron area must be effective at collecting water without unduly impeding the smooth forward motion of the airplane. In addition, in many weather conditions, if used processing liquor is not removed and discarded quickly enough, dense fog will form, and such fog may also damage airfield aircraft components located in the vicinity of the de-icing station. It has been found to be troublesome.

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

This object is achieved according to the invention by an aircraft washing apron consisting of a substantially planar layer of liquid permeable deck material and an impermeable layer adapted to collect and carry away the process liquor and sloping towards the drainage pipe. Ru.

In the case of an apron so constructed, the process liquor that flows down onto the surface layer is prevented, since the arrangement and device for collecting and carrying away the process liquor are placed below the surface layer.
As a result, it passes directly through said surface layer, which can consist of a planar shape.

This construction of the apron also offers the important advantage that the drain can be connected to a pump arranged to remove water vapor from the liquid-permeable surface layer by suction. In this way, water vapor is prevented from spreading over a large area and from rising up from the aircraft washing apron and reaching the interior of the aircraft in the form of a vapor cloud, which is related to processing performance and is particularly important in busy and crowded areas. There are considerable benefits associated with overall visibility at the airfield. The surface layer also serves as a coarse filter in which leaves, twigs, etc. can stay. As a precaution, the suction pump is suitably adapted to switch the way in which the air is temporarily blown upwards through the drain pipe and through the external surface, so that any foreign matter present is swept through the channels and the surface layer. Can be blown off the aisle at will. Preferably, cold ambient air, or suitably chilled air, is blown through the passageway for a suitable length of time just prior to commencing the de-icing process, which is typically completed in about 6 minutes.

This provides the advantage 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 deicing process, so that the water contained in the vapor is removed from the machine room. The water vapor condenses before it reaches the pump.

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 located at the aerodrome for suitable direct access from the aircraft approach path leading from the aerodrome building to the runway. The apron 1 has a width slightly larger than the wingspan of the largest airplane that can be expected to handle, and extending across the apron is a portal frame 2, which is tarmac 1
As the airplane 4 rolls upward, various parts of the airplane
In particular, pipes and nozzles 3″f are provided which are positioned so as to pass through a portal frame with nozzles placed at a predetermined distance from the upper and lower surfaces of the aircraft wing. Located on one side is a monitoring cabin 5. Located adjacent to the monitoring cabin 5 is a partially buried 7+2.machine room 6 extending into it a pipe 3 with the above-mentioned spray nozzles.

The apron 1 consists of three different layers: a bottom support layer 10, a base layer placed above the support layer 10 and made of a liquid-impermeable material such as concrete, and sloping steeply from either side of the centerline of the apron 1. It is constituted by a permeable layer 11 and finally by a top layer 12 consisting of a liquid permeable material such as a road surface material, for example drainage asphalt, and having a substantially flat top surface.

The liquid permeable material is a high temperature mixer (
(150-170°C) asphalt concrete, and fiber additives that increase the compressive strength of the material and its useful life length.

A drain pipe 15 is buried in the longitudinal edge of the impervious layer 11 around the apron 1, so that all liquids that penetrate through the surface layer 12 and run down along the impermeable layer are drained into the drain pipe 15. Can be collected.

The drain pipe 15 is connected to the machine room 6 by a discharge pipe 16. The machine room 6 houses equipment consisting of pumps, tanks, filters, valves, etc. for sucking up the water-glycol mixture under high pressure, which changes the condensation into the pipes 3 and nozzles as the aircraft is slowly moved through the portal frame. do. All surfaces of the airplane are brought into contact by liquid jets according to a predetermined program, during which ice and snow are loosened and washed off the airplane and fall with cleaning liquor onto the apron 1, which is injected with factory liquor and melting liquid. Snow and ice pass through the surface layer 12 onto the impermeable layer 11 and from there to the drain pipe 15 and discharge pipe 16t? There, it passes rapidly to the machine room 6 where the liquor is restored to the desired concentration and strengthened for wicking back into the pipes 3 and nozzles of the portal frame 2.

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.

The cloud of water vapor that would otherwise be drawn from the tarmac 1 and from the relatively warm wash liquor in cold weather is drawn off through the drain/discharge pipe 15, 16', which is an important consequence of the invention.

The portal frame 2 does not need to be an immovable structure, but the apron 1
The aircraft may be arranged for longitudinal movement, in which case the aircraft can be made to be stationary during the de-icing process. The invention relates to an airplane de-icing system consisting of an airplane washing apron 1, means 3 for spraying treatment liquor onto the airplane, and companion means 11, 15, 16 for collecting and carrying away the liquor.

In order that liquor can be quickly and reliably removed from the tarmac, the tarmac has a generally flat surface layer 12 of so-called drained asphalt, through which the treated liquor is collected and conveyed. It is constructed of an impermeable layer 11 which lies beneath a flat surface layer and slopes sharply downwards towards the drain 15. The device also preferably includes a pump arranged to draw air downward through the surface layer so as to transport the water vapor formed and thus prevent the formation of vapor clouds that tend to rise from the tarmac 1.

[Brief explanation of the drawing]

The suction surface is a partially sectional perspective view showing an embodiment of the de-icing device according to the present invention. In the figure, 1 is an airplane washing parking lot, 3 is a pipe, 4 is an airplane, 7 is a pump, 11 is an impermeable layer, 12 is a surface layer, 1
5 is a drain pipe, and 16 is a discharge pipe.

Claims (3)

[Claims] (1) An airplane de-icing system comprising an airplane washing apron merged with an airplane walkway, means for washing said airplane with treated liquor, and means for collecting and carrying away said treated liquor, wherein said apron is made of a liquid such as wastewater asphalt. An aircraft de-icing system comprising a generally planar layer of permeable decking material and an impermeable layer sloped toward a drainage pipe for collecting and carrying away the treated liquor. (2) The aircraft deicing device according to claim 1, wherein the drain pipe is connected to a pump for removing water vapor from the liquid permeable surface layer by suction. (3) Airplane deicing according to claim 2, characterized in that the pump can be switched to a mode in which it temporarily blows air, preferably cold air, through the drain pipe and upwardly through the surface layer. Device.