DE20316418U1 - Hand-cart mounted road repair tool has fuel tank and two burner lances arranged in mirror-image presentation to each other - Google Patents

Abstract

A road repair power-tool consists of a hand-cart frame (F) with a handle (S). The frame is coupled to a motor which is either nearby or on the frame, and driving a compressor. The frame further has a fuel tank linked to two burner lances. Together, the compressor, fuel tank and burner lances (HL1, HL2) direct flames at a point on the road surface. The compressed air outlets are esp. form a mirror-image arrangement.

Description

"Mobile device with two hot air lances for cleaning, melting and widening joints or cracks

State of the art

The innovation primarily affects a mobile device for cleaning, melting and widening of joints or cracks before pouring with thermoplastic material in accordance with protection requirements 1.

In road construction, cuts are made in a road surface or milled Filled with grout. Must continue Cracks caused by stress or subsidence due to weather conditions are created, are grouted with permanently elastic casting compound, around the road surface from further damage to preserve.

For example, from the DE 36 12 685 C1 the applicant has known a hand-held device for cleaning, melting and widening joints or cracks in asphalt road surfaces, a so-called hot air lance. The hot air lance has a trolley on which a casing open to the atmosphere is attached, which has a tapered outlet opening on the road surface. An atmospheric burner is arranged in front of the opening in the jacket housing, the flames of which are directed towards a spiral pipe which is fed through the jacket housing and to which compressed air is supplied. The compressed air is fed to the pipe spiral via a fixed supply line attached to the carriage, which is connected to a flexible supply line leading to a compressor. The fixed supply line for the compressed air can also be designed as an operating handle for the hot air lance, from which the upper end of the pipe spiral is appropriately led out. The supply lines for fuel and compressed air have shut-off valves on the fuel storage container and compressor at a sufficiently accessible location are located on a truck traveling with them. The tube spiral is brought with the outlet opening of its rectilinear end piece close to the tapered outlet opening of the jacket housing, so that separate hot air outlets for the compressed air and the gas-fresh air mixture are provided. When the hot air lance is in operation, the outflowing thin compressed air hot jet is directed directly at the joint to be repaired, blows it free of foreign objects and allows the bitumen to melt in the joint. At the same time, the outflowing thin compressed air hot jet also entrains a sufficient amount of the hot gas-fresh air mixture from the casing, so it is surrounded by a hot ring jet with a lower flow rate, which ensures that the bitumen at the two edges of the joint melts widely. Such pretreated joints can be reliably filled with permanently elastic casting compound in an immediately or possibly later subsequent step.

After all, the is not pre-publish DE 103 40 051.6 from the applicant a device for cleaning, melting and widening joints or cracks and pouring with thermoplastic material known, which has:

• - one melting cooker arranged on a chassis
• - one container as a cooker room with a heating chamber formed on the double-walled bottom and the hinged lid has at least one opening,
• - one large area burners and
• - one in the container B arranged agitator
• - one on the chassis outside of the melting pot attached motor which drives a compressor and
• - one hot air lance connected to the compressor, its outlet opening for the compressed air hot jet into the opening of the melting pot is insertable.

Another in the DE 103 40 051.6 The alternative device described has:

• - one on the loading area a motor vehicle attachable melting cooker
• - one container with without insulation,
• - one in the container arranged cooker room, which consists of a drum-shaped Einsaiz and a spout container adjoining it on the side bevel Bottom consists of the bottom of the drum-shaped insert and the bottom of the pouring spout to the bottom of the cylindrical container a heating chamber and one on the side wall opposite the pouring spout annular Exhaust air chamber forms
• - one height-adjustable large-area burners arranged in the heating chamber,
• - on agitator mounted in the bottom of the insert and
• - one mounted above on the axis of the agitator Grate, with the exhaust air chamber above the grate in the barrel-shaped Insert extends, one attachable to the loading area outside the melting encoder Motor that drives a compressor and
• - one hot air lance connected to the compressor.

The device according to DE 103 40 051.6 is ideally suited for small repair work in road construction, where special requirements for availability, low energy consumption, maneuverability, robustness and ease of use are ordered (also due to the relatively low weight of 20 kg to 100 kg without gas cylinders) , she enables the user a simple and at the same time safe operation, because he can convince himself of the correct operation at any time by direct visual inspection, as well as the possibility for manual control. On the other hand, it has been found in practice that a more powerful hot air lance is advantageous in order to be able to process cracks and joints more quickly and to be able to prepare hairline cracks or wide cracks equally for crack grouting.

problem

The innovation lies opposite the known device for cleaning, melting and widening Joints or cracks the task of designing them in such a way that provided a structurally simple and small device with which quickly and with comparatively little energy expenditure Joints or cracks can be processed and prepared

invention

Starting from a device according to the vorveröffenilichten DE 103 40 451.6, solved in that it has:

• –A chassis ( F ) with push handle ( S )
• - one on the chassis ( F ) attached or external motor, which drives a compressor, and a fuel reservoir and
• - two hot air lances connected to the compressor and the fuel storage container and which can be connected to one another ( HL1 . HL2 ), such that their outlet openings ( HLÖ 1 and HLÖ 2 ) are directed towards each other for the compressed air hot jet in mirror image.

Advantageous effects of the invention

The new device has the advantage on that on surprising simple and inexpensive Way a powerful combination of two hot air jacks available stands with which cracks, joints evenly and without local overheating and can still be processed quickly and with which a comparative low energy consumption is required. As experiments have shown the blowing pressure directed towards each other causes a corresponding swirling over a larger area, so that the for this area the total amount of energy required is less than this required with a single hot air lance is. Furthermore enables the new device due to the high mobility, for example, easy tracking of wild cracks in the road surface, Finally has the new device the advantage that a compact design with short distances of the delivery rate and thus a sufficiently high blowing pressure is made possible

Further refinements of the invention

In further training of the innovation, according to protection claim 2, means for moving the hot air lances relative to the chassis and means for locking or locking in the desired one Position provided.

This training of innovation has the advantage that the user is simple and at the same time safe operation that meets the respective requirements allows because he can convince himself of the correct operation at any time through direct visual inspection can

In further training of the innovation, according to protection claim 3, means for pivoting or rotating the hot air lances relative to the chassis and means for locking or locking in the desired one Position provided.

This training of innovation has the advantage that the degrees of freedom to the desired setting for the Users are further enlarged In particular, the innovation for processing wide cracks, Grouting and ideal for drying surfaces suitable.

In continuing education the innovation points according to protection claim 4, the hot air lance at least three coils derat that a thicker central one guided Pipe spiral longer than the two coaxial thinner pipe spirals.

The thick compressed air hot jet becomes straight through the tapered outlet opening blown out and aimed directly at the interior of the joint to be repaired, to clean them of the foreign bodies inside, this compressed air hot jet is surrounded by a vortex of the two thin compressed air hot jets and a jet of the gas-fresh air mixture of lower flow velocity result, which, despite the achievable high temperature, means energy consumption is low. This makes it reliable a wide melting of the two joint edges allows so that before grouting with potting compound no primer is required and still a reliable Liability is achieved. The temperatures and the outflow speeds of the two working gases, hot air jet from compressed air and the jet of gaseous fuel surrounding it together with the fresh air drawn in can be shut off using the shut-off valves regulate within certain limits or coordinate them optimally.

Presentation of the invention

Other advantages and details can be the following description of preferred embodiments the invention with reference to the single drawing.

In the 1 In side view and partially in section, the device for cleaning, melting and widening joints or cracks has a moving part F with push handle S , one on the chassis F attached or external motor, which drives a compressor and a fuel storage tank and two hot air lances connected to the compressor and the fuel storage tank and connectable to each other HL1 . HL2 on the outlet openings HLÖ 1 . HLÖ 2 for the compressed air hot jet are directed towards each other in mirror image

There are also means to move VS the hot air lances HLÖ 1 . HLÖ 2 relative to the chassis F and means for locking or locking in the desired position. Preferably as a means VS a sled and a set screw used for fastening.

Furthermore, there are means for pivoting or rotating SC the hot air lances HAPE 1 . HLÖ 2 relative to the chassis F and means for locking or locking in the desired position.

The hot air lances preferably have HL1 . HL2 at least three pipe spirals in such a way that a thicker centrally guided pipe spiral is longer than the two coaxial thinner pipe spirals.

After all, the hot air lances HL1 . HL2 Connected to a common gas bottle with fuel via a controllable double connection.

All shown and described Design options, as well as all disclosed in the description and / or the drawing new individual features and their combination with one another are essential to the invention. For example, a bendable handle can be used instead of a push bar the hot air lances and the chassis can in the longitudinal direction be swiveling to each other by a hasty angle; the blow-out area the hot air lance can be designed as a gooseneck etc.

Claims (5)

Device for cleaning, melting and widening joints or cracks, which comprises: - a chassis ( F ) with push handle ( S ), - one on the chassis ( F ) attached or arranged outside motor, which drives a compressor, and a fuel storage tank and - two hot air lances connected to the compressor and the fuel storage tank and connectable to each other ( HL1 . HL2 ), such that their outlet openings ( HLÖ 1 and HLÖ 2 ) for the compressed air hot jet are directed towards each other in mirror image. Device according to claim 1, characterized in that means for moving ( VS ) of the hot air lances ( HLÖ 1 and HLÖ 2 ) relative to the chassis ( F ) and means for locking or locking in the desired position are provided. Device according to claim 1, characterized in that means for pivoting or rotating ( SC ) of the hot air lances ( HLÖ 1 and HLÖ 2 ) relative to the chassis ( F ) and means for locking or locking in the desired position are provided. Device according to claim 1, characterized in that the hot air lances ( HL1 . HL2 ) have at least three pipe spirals in such a way that a thicker, centrally guided pipe spiral is longer than the two, thinner pipe spirals coaxially guided with it. Device according to claim 1, characterized in that the hot air lances ( HL1 . HL2 ) are connected to a common gas bottle with fuel via an adjustable double connection.