FI94978B - Road, airport or similar cleaning equipment - Google Patents

Description

94978

ROAD, AIRPORT OR SIMILAR CLEANING EQUIPMENT

The invention relates to a road, airport or similar cleaning apparatus. The apparatus consists of a successively arranged dozer chute, a brushing device and a blowing and / or suction device, the longitudinal axes of which are substantially perpendicular to the direction of travel of the device and a transverse conveyor extending over its entire width is arranged in connection with the dozer chute.

At present, e.g. vehicle-driven brush fans, such as those described in FI-44633. One disadvantage of these towed devices is that the wheels of the towing vehicle pack the remaining snow tightly onto the surface to be cleaned, from which the brush-blower combination following it cannot remove it. To overcome the above drawback, devices have been developed in which either a plowing dozer blade, as in FI-74504 and FI-811534, or a combination of a dozer blade and a rotating brush device, as in FI-902577, is placed in front of the vehicle causing the movement.

There are also cleaning devices in which, in order to achieve a good cleaning result, a dozer blade, a rotating brush device and a blowing device for finishing cleaning are placed in succession in the same device, as disclosed in FI-811534. The device implemented in this way achieves a moderately good cleaning result, but its effective working width has to be limited rather small, because in the pursuit of higher driving speeds, the snow is not moved sideways with sufficient efficiency in the dozer blade or the brush device.

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In both, the force that moves the snow to the side is achieved by installing the the central axis of the device (dozer blade, rotating brush) in an oblique position relative to the cleaning vehicle. If an attempt is made to increase the snow-shifting force to the side by turning the dozer blade and the rotating brush to a larger angle, the effective working width is lost. Another limiting factor in increasing the angle, especially at high driving speeds / amounts of snow, is the lateral friction of the wheels of the cleaning vehicle, which is then not sufficient to maintain the correct direction of travel.

In order to enhance the lateral transfer of snow, some plowshares with a dozer blade only have a conveyor screw fitted to the dozer blade, as shown in FI-843150 and FI-85297. However, the efficiency of such a conveyor is not sufficient in the pursuit of high working width and power, mainly due to the open structure of the chute (dozer blade) surrounding the conveyor screw. The avoidance of these devices is based on the combined effect of the oblique position of the dozer blade and the conveyor screw.

In these conveyor screw applications, the central axis of the transport chute is mounted in an oblique position with respect to the horizontal, so that the snow to be moved to the side has to rise "uphill", which in turn makes it difficult to move to the side. The greater the working width, the greater the resistance, and large working widths are not possible at all.

In the case of the rotating brushes used to improve the cleaning trail of the dozer blade, the lateral displacement of the snow is particularly poor and the above-mentioned conveyor screw does not provide any assistance. Therefore, the cleaning brushes currently used do not allow a significant increase in working width and / or working speed.

With regard to blast cleaning, the above-mentioned devices have had a high power requirement for blowing compared to the blowing applied to the field surface and 3 94978 in relation to its cleaning effect. In this respect, an improvement has been sought in some purely blow-based devices by blowing through a nozzle from a confined space to the surface of the field over the entire width of the manifold, as disclosed in FI-793753. The combination of blowing and suction functions has also been exploited, as shown by CH-496856 and CH-338482. However, the cleaning effect achieved by blowing and / or suction alone remains very low.

The apparatus according to the invention provides a decisive improvement in the above-mentioned drawbacks.

To achieve this, the apparatus according to the invention is characterized by what is set forth in the characterizing part of claim 1. The most important advantage of the invention can be considered the high work efficiency and good sweeping mark achievable with the device, especially in snow removal. The main merit of this falls on the efficient cross conveyor, which enables a large working width when serving both the gutter and the cleaning brush in the transverse transfer of snow. By combining this unit with more efficient blast cleaning with collection chambers, it is possible to achieve clearly better quality standards than airports, especially at airports.

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

Figure 1 shows the apparatus as a whole in section and, in the case of the cleaning apparatus itself, in a vertical section.

Figure 2 shows the cleaning device itself in a schematic side view and in a vertical section.

Figure 3 shows a schematic plan view and a horizontal section of the same cleaning device.

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According to Fig. 1, the cleaning device (1) itself is tb-978 implemented in such a way that a separate rear-pushing vehicle (wheel loader, truck, etc.) f, denoted by reference numeral 2, is required to move and guide it on the surface to be cleaned.

At the front edge of the cleaning device (1) there is a lip (3) along which the snow rises into a trough (4), the longitudinal axis of which is horizontal and perpendicular to the direction of travel of the device. In the trough (4) the conveyor (5) moves in the same direction, which moves through the lip (3) into the trough (4) laterally to the discharge end of the conveyor (5), which can be changed by changing the direction of rotation of the conveyor. leaving a plowing wall on the side, or by centrifuging the snow farther away from the device by already known methods.

In order to remove snow under the lip (3), the device has a height-adjustable counter-rotating brush (6) mounted perpendicular to the direction of travel, which brushes the snow lip (7) over the rear trough (8) of the conveyor (5). ) transports snow sideways.

Due to the small amount of snow, the snow can be recycled from the front to the discharge head. The use of a conveyor makes the lateral transfer of snow removed by the brush substantially more efficient than previous solutions.

The apparatus further comprises a pu-control apparatus (9) known per se, with which the work is finished. The blower device (9) is preferably designed in such a way that air is blown from the chamber (9a) through a slot (9b) extending over the entire working width of the device (1) against the surface to be cleaned, from which the blown air together with the removed snow is directed to the collecting chamber (9). c). The chamber (9c) may also be connected to the chamber (9a) on the suction side of an overpressure fan (not shown).

5 94978 In this case, the snow entering the chamber (9 c) is separated from the air by means of a cyclone effect and directed to the side of the cleaning device (1) through the open end of the nozzle (9 c).

The actuator of the cleaning device (1) - the conveyor (5), the rotating brush (6), the blowing unit (9) - are so independent that they can be switched on or off as required, either independently, although the the devices are generally used simultaneously.

The above-mentioned actuators are most preferably powered by a common power unit (10), which rotates a hydraulic pump (11) connected to it, to which the hydraulic motors of the various actuators are connected by piping and the necessary control devices.

The cleaning device (1) is partially in sliding contact with the substrate to be cleaned. This is advantageous, for example, for the anterior lip (3). In other respects, the support is based on wheels (not shown), which are preferably equipped with height adjustment to ensure a good cleaning result in different snow conditions and on different substrates to be cleaned.

In order to fasten the cleaning device (1) to the pushing vehicle quickly and reliably, its rear part is equipped with a standardized fastener (not shown). In order to centrifuge the plowing wall generated by the cleaning device (1) to its side, standardized fasteners can also be connected behind the discharge points of the conveyor (5) to connect a centrifugal package known per se, by which said plowing barrier is immediately dismantled and spread aside.

In particular, it should be noted that the most important actuator for the efficiency of the device according to the invention - the transverse conveyor (5) - can be implemented in other ways than in the form of the lamellar conveyor described above.

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The conveyor may be some other mechanical conveyor or alternatively pneumatic. Otherwise, it should be noted that the invention has been described above with reference to only one preferred embodiment thereof. However, this is in no way intended to limit the invention to this example only, but many modifications are possible within the scope of the inventive idea defined by the following claims.

Claims (6)

94978 A road, airport or similar cleaning apparatus (1) comprising successively arranged dozer chutes (4), a brushing device (6) and a blowing and / or suction device (9) extending substantially the entire working width of the device, said devices being arranged so that their longitudinal axes are substantially perpendicular to the direction of travel of the device (1) and a transverse conveyor (5) extending its entire width is arranged in connection with the buffer trough (4) to move the snow rising to the trough (4), characterized in that the transverse conveyor (5) snow siding. Device according to Claim 1, characterized in that the transverse conveyor (5) is provided with its own drive device. Device according to one of the preceding claims, characterized in that the transverse conveyor (5) is mechanical. Device according to Claim 3, characterized in that the transverse conveyor (5) is a lamellar conveyor. a Device according to one of Claims 1 to 2, characterized in that the transverse conveyor (5) is pneumatic. Device according to one of the preceding claims, characterized in that the dozer chute (4), the brushing device (6) and the blowing and / or suction device (9) comprising the cleaning device (1) are arranged in a common body immediately in succession. 3 94978 PATENTANSPRÄK