DE10327413A1 - Surface cleaning method for hood, by spraying cleaning fluid in pressurized manner and at preset temperature on the surface of the hood, supplying thermal or mechanical energy in the process - Google Patents

Abstract

Cleaning fluid is sprayed in a pressurized manner and at a preset temperature on the surface (9) of the hood (1), supplying thermal or mechanical energy in the process. The supplied energy can be either electricity, infrared radiation, or high-frequency radiation. An independent claim is also included for an apparatus used in cleaning surface of hood.

Description

The The invention relates to a method and apparatus for removal of sticky and / or dried substances of surfaces.

sticky Impurities on surfaces, such as As chewing gum, are czt. occasionally eliminated with steam jets. This cleaning principle is very costly and has moreover the disadvantage that after the chewing gum removal, the purified Optical place very much apart from the surrounding area. The overall appearance the area is just as uncomfortable as before cleaning. To remedy this situation create, a cleaning of the entire surface is required. According to current knowledge is at such a surface cleaning the cleaning success czt. in no way satisfactory.

Further There are natural "contaminants" like grasses or Wild vegetation on z. Paved areas; to their sustainable Until now, chemicals have been removed or open flames used. The disadvantage here is that on the one hand the environment is damaged, on the other hand, injury the surface occurs.

In the OS 24 57 708 is implemented a procedural principle in which in the front wall of a cleaning housing and in the rigid partition flow channels are provided between the working areas of the housing, which significantly reduce the cleaning effect.

In the EP 0 279 729 B1 a cleaning vehicle is described, wherein a respective separate spray chamber or suction chamber are provided and ends in the vertical direction, a rigid partition at a small distance above the surface to be cleaned. Both work areas are not completely sealed from the environment. Thus, there is a larger opening in the spray hood for carrying the high pressure lines, and the side walls of the suction hood are not provided in the sealing strip. Due to the process, the two work areas must be attached to the rear of a vehicle, because an additional humidification system is provided in front of the vehicle.

In the EP 0 773 327 B1 is presented a cleaning system that does not have the disadvantages of the above documents. Under a cleaning hood, both working areas are completely shielded from each other and from the environment. To the outside by sealing lips, which are located at the bottom of the spray and suction hood. Under the cleaning hood spray chamber and suction chamber are separated from each other by a rigid transverse wall in the vertical direction, which ends just above the surface to be cleaned.

A roller seal between objects or devices and a surface is in DE 199 09 410 C2 released; Here, freely movable rollers are provided, which have over a bearing axis an enlarged central bore, so that they are movable up and down. Instead of the rollers flat rods can be used with a slot as sealing elements.

In DE 4 404 230 A1 a method and a device are specified, which are particularly suitable for cleaning surfaces, in particular joints between paving stones and floor slabs; Spraying and suction device are arranged in a height-adjustable hood.

In DE-GM 90 17 025.3 is a mobile device for cleaning floor coverings mentioned, here is in a separate spray room a liquid sprayed and sucked in a separate suction area; about the procedural Parameters are not statements.

A similar Device for cleaning soiled floors is presented in DE-GM 93 12 610.7. In doing so, a cleaning agent is depressurized via brushes that turn and placed in front of a vehicle, brought to the surface and over a separate exhaust device located at the rear of the vehicle sucked off again.

In EP 0 162 769 A1 a device for floor cleaning is described, wherein the spraying and suction device are arranged in a hood without physical separation and the axis of the suction line is parallel to the ground. The cleaning fluid is sprayed under pressure on the surface.

EP 0 318 074 B1 describes a device for cleaning flat surfaces with pressurized water jets, in particular for removing rubber abrasion on runways. A suction hood is arranged around the nozzle for applying the liquid.

In EP 0 624 692 A2 is presented a work machine for the removal of oil and grease traces from traffic route surfaces. In front of a chassis water is sprayed under pressure, which is distributed with two opposing brushes. At the rear of the chassis, the water is absorbed with the oil / fat.

In FR 2 667 087 A1 A plant for the de-rusting of surfaces and for the cleaning of soils with extraction is shown. Again, in a hood and vacuumed, the Beson derheit consists in that a solid pickling agent such. B. sand is entrained over a high flow velocity and thus meets with high impact energy on the surface to be rusted.

In DE-GM 92 11 401.6 is a closed high-pressure cleaning system provided with suction. In a working hood, a liquid becomes pressurized on the surface brought and by a horizontally rotating cleaning roller the area distributed; at the same time a suction head is mounted in the hood, the to the surface is sealed.

The Methods known in the art are not suitable for removing sticky substances from surfaces.

To This finding seems best a cleaning success by achievable a combination of mechanical and thermal processes, wherein a solvent is used as a pre-purification process can, which triggers these impurities during a contact time. there depends on that Success from being sufficient on a particular work area thermal and / or mechanical energy is applied before the contamination with the solution and detergent from the surface is removed, taking place in a meaningful way by suction should. The suction device can together in a hood with the spray device be integrated or done separately.

Of the Invention is based on the object, a method and apparatus to indicate the removal of sticky substances from surfaces.

The Task is in a method in the preamble of claim 1 type according to the invention thereby solved, that cleaning fluid Sprayed with pressure and temperature on the surface and thermal and mechanical energy supplied so that the sticky or even the dried / hardened sticky Substance softens and is released from the surface.

In a further process step may then be the liquid with the detached one Substance of the area be sucked up, the suction device separately or in the Hood integrated can be provided. The special feature of the combination consists of various basic procedural operations in that the operation only in certain parameter areas guaranteed is.

A Embodiment of the method according to the invention provides that the hood is thermally insulated.

A Further embodiment of the method according to the invention provides that the surface to be cleaned thermal energy, for example, electrical energy, infrared radiation or high-frequency radiation or over another heat exchanger or directly with exhaust gases of a furnace or with steam or with the cleaning fluid self supplied becomes. The thermal energy can also be in a separate chamber be supplied before the surface to be cleaned.

The inventive method is further characterized in that the surface mechanical Energy over at least one drivable rotating brush is supplied.

there then be in the brushes expedient integrated spray nozzles.

in this connection Make sure that the brushes dimensionally stable at relatively high temperature and pressure are.

The Further developing process can then cleaning fluid over a static nozzle bar supplied become. It can with equal success also rotating possibly different jets be used.

Appropriately doing so by the measure use be made that the spray direction the nozzles on the middle of the brushes used set near the area is.

And after all sees a functional design of the method according to the invention, that the substance to be removed is dissolved by a solvent.

A Device for cleaning surfaces in a sealed against the environment hood, in particular for carrying out the inventive method has means for cleaning fluid with pressure and temperature under supply of thermal and mechanical energy to work areas from to cleaning surfaces spray.

Farther sees the device according to the invention Means for adjusting the temperature of the cleaning fluid between 70 ° and 150 ° Celsius ahead.

there are settings for a pressure of the liquid in accordance with the hardness the brush between 2 MPa and 30 MPa.

A further advantageous embodiment of Device provides that the means for supplying the thermal energy are arranged in a separate chamber in front of the working area of the surface to be cleaned.

A expedient embodiment the device according to the invention further provides that the brush so fine-bristled that it intervenes in the pores of the surfaces to be cleaned.

Farther is provided that the jet nozzles on the outer edge the brush sitting to the center of the brush directed and rotatable drivable formed.

And after all is provided with the embodiment of the device that the brush and the jet nozzles arranged in or on a common optionally rotatable unit are.

Further Details, features and advantages of the invention will be apparent from the following Explanations a schematically illustrated embodiment can be seen. Show it:

1 a cleaning device with brushes, spray nozzles and means for supplying thermal energy;

2 the cleaning device with separate chamber for supplying thermal energy.

The 1 shows an overview of the process and the cleaning device. In a hood 1 that with sealing strips 2 sealed against the environment and only to the cleaning surface 9 is open, is about a tight passage 4 Cleaning fluid with a certain pressure in the hood 1 fed. There, the cleaning liquid, for example via a drivable rotating brush disc 8th with heat-resistant brush attachments 7 sprayed on the surface. The sealing strips 2 the hood 1 can be rigid or flexible. The sealing strips can be adjustable. Rigid sealing strips can be set in a grinding manner on the surface to be cleaned.

In the brush disc 8th are for example nozzles 3 integrated for cleaning fluid. At the same time, thermal energy 6 and / or mechanical energy by means of the brush 7 . 8th supplied, in each case via tight feeds 5 . 4 in the hood 1 , The thermal energy 6 can also be alternatively supplied via the cleaning liquid itself.

• – Die Temperatur der Reinigungsflüssigkeit beträgt zwischen 70° und 150° C.
• – Der Druck kann je nach Härte der Bürste von 2 MPa bis zu 30 MPa betragen.
• – Zur Schonung der Oberfläche und um möglichst wenig Wasser zu verbrauchen, sollte der Druck so gering wie möglich sein. Dafür ist die mechanische Unterstützung der Bürste erforderlich.
• – Die Bürste muss so fein sein, dass sie zumindest geringfügig in die Poren der Oberfläche eingreifen kann.
• – Die Borsten müssen bei der genannten Temperatur formstabil bleiben.
• – Die Strahldüsen sollten am äußeren Rand der Tellerbürste sitzen und zum Zentrum der Bürste gerichtet sein, damit das heiße Wasser möglichst lange unter der Bürste verweilt.
• – Vorzugsweise sind rotierende Düsen einzusetzen, es geht aber auch mit statischen Düsen. Rotierende Düsen haben den Vorteil, dass unterschiedliche Strahlformen eingesetzt werden können, wie z. B. Punktstrahldüse und eine Flachstrahldüse pro Tellerbürste.

To remove sticky substances such. For chewing gum, the following process parameters should be adhered to for satisfactory cleaning:

• - The temperature of the cleaning liquid is between 70 ° and 150 ° C.
• - Depending on the hardness of the brush, the pressure can range from 2 MPa up to 30 MPa.
• - To protect the surface and to use as little water as possible, the pressure should be as low as possible. This requires the mechanical support of the brush.
• - The brush must be so fine that it can at least slightly interfere with the pores of the surface.
• - The bristles must remain dimensionally stable at the stated temperature.
• - The jet nozzles should sit on the outer edge of the plate brush and be directed towards the center of the brush, so that the hot water stays under the brush for as long as possible.
• - Preferably rotating nozzles are to be used, but it is also possible with static nozzles. Rotating nozzles have the advantage that different beam shapes can be used, such. B. spot jet and a fan nozzle per disc brush.

2 shows a cleaning device with brushes 7 . 8th and jet nozzles 3 in a chamber 11 , In the front of the work area of the area 9 provided separate chamber 10 are the means 5 . 6 arranged to supply the thermal energy.

Claims (18)

Method for cleaning surfaces ( 9 ) in a hood sealed against the environment ( 1 ), characterized in that cleaning fluid with pressure and temperature on the surface ( 9 ) is sprayed and thermal and / or mechanical energy is supplied. Method according to claim 1, characterized in that the hood ( 1 ) is thermally insulated. Method according to claim 1 or 2, characterized in that the area to be cleaned ( 9 ) Thermal energy, for example, electrical energy, infrared radiation or high-frequency radiation or via another heat exchanger or directly with exhaust gases of a furnace or with steam or with the cleaning liquid itself is supplied. Method according to one or more of claims 1 to 3, characterized in that the thermal energy in a separate chamber ( 10 ) in front of the surface ( 9 ) is supplied. Method according to one or more of claims 1 to 4, characterized in that the surface ( 9 ) mechanical energy via at least one drivable rotating brush ( 7 . 8th ) becomes. Method according to claim 5, characterized in that in the brushes ( 7 . 8th ) Spray nozzles ( 3 ) to get integrated. Method according to one or more of claims 1 to 6, characterized in that the brushes ( 7 . 8th ) are dimensionally stable at relatively high temperature and relatively high pressure. Method according to one or more of claims 1 to 7, characterized in that cleaning liquid via a static nozzle bar or rotating jet nozzles ( 3 ) is supplied. Method according to one or more of claims 1 to 8, characterized in that the spraying direction of the nozzles ( 3 ) on the center of the brushes ( 7 . 8th ) is set near the area. Method according to one or more of claims 1 to 9, characterized in that the substance to be removed by a solvent dissolved becomes. Device for cleaning surfaces ( 9 ) in a hood sealed against the environment ( 1 ), in particular for carrying out the method according to the preceding claims, characterized in that the device comprises means for applying cleaning fluid under pressure and temperature while supplying thermal and mechanical energy to working areas of a surface to be cleaned ( 9 ) aufzusprühen. Device according to claim 11, characterized in that the means ( 5 . 6 ) for supplying the thermal energy in a separate chamber ( 10 ) in front of the working area of the area ( 9 ) are arranged. Device according to claim 11, characterized in that in that the device comprises means for adjusting the temperature of the cleaning fluid between 70 ° and 150 ° C has. Device according to claim 11, characterized in that that the device means for adjusting the pressure of the liquid in accordance with the hardness the brush between 2 MPa and 30 MPa. Device according to one of claims 11 to 14, characterized in that the brush ( 7 . 8th ) is so fine-bristled that at least into the pores of the surface to be cleaned ( 9 ) intervenes. Device according to one or more of claims 11 to 15, characterized in that jet nozzles ( 3 ) on the outer edge of the brush ( 7 . 8th ) sitting directed to the center of the brush and rotatably driven drivable. Device according to one or more of claims 11 to 16, characterized in that the brush ( 7 . 8th ) and the jet nozzles ( 3 ) are arranged in or on a common optionally rotatable structural unit. Device according to one or more of claims 11 to 17, characterized in that the hood ( 1 ) with rigid or elastic optionally adjustable sealing strips ( 2 ) is provided.