DE10311137B4 - blasting machine - Google Patents

Abstract

Blasting machine with a Lance (1) for applying a mixture of blasting agent (10), liquid vapor and / or a carrier gas, the lance (1) over a conduit (8) connected to an inlet (11) in a chamber is, in which the blasting agent (10) is located and the chamber (9) a device (15) for swirling and maintaining a Vortex of the blasting medium (10) is associated with the inlet (11), characterized in that the inlet (11) of the conduit (8) near a wall (12) of the chamber (9) and arranged facing this.

Description

The The invention relates to a blasting apparatus with a lance for applying a mixture of blasting agent, liquid vapor and / or a carrier gas, wherein the lance over a conduit is connected to an inlet in a chamber, in which is the blasting agent and the chamber a device for swirling and maintaining a vortex of the abrasive is assigned before the inlet.

STATE OF THE ART

Blasting equipment are known in particular as sandblasting equipment. They are used essentially for cleaning structures of all kinds or materials of all kinds, such as wood, metals, stone, etc. Also, an editing, such as a matting of the machined surfaces; is possible. Only by way of example is on the DE 42 01 860 C1 directed. There, an air / abrasive mixture before a jet nozzle water is supplied, whereby dust formation is prevented.

From the DE 34 13 576 Furthermore, a method and a device for blasting of workpieces, structures od. Like. By means of a loaded with a granular blasting agent carrier air flow known. In order to prevent corrosion of the treated surfaces and to accelerate their drying, is used as an additive water vapor. A device suitable for this purpose consists of a compressor, a compressed air line, to which a blasting agent container provided with a metering device is connected. The steam generation is a steam generator whose steam line is connected via a controllable throttle valve to the compressed air line at a location behind the junction of the blasting agent container point.

From the DE 44 40 146 A1 a method and a jet device is known in which the cleaning of objects takes place by means of an air flow, in which a granular blasting medium is introduced. The blasting medium-air mixture is supplied to water prior to impact with the object, it being proposed to increase the cleaning effect that the water is mixed in the form of heated water vapor with the blasting medium-air mixture.

From the DE 94 08 944 U1 is a sand blasting machine with a substantially all-sides closed sandblast housing known whose lower housing part forms a funnel-shaped downwardly tapering, serving as a receptacle reservoir for blasting. A nozzle head with sandblasting nozzle arranged in the sandblasting housing is supplied with compressed air via a compressed air line and via a compressed air valve. The nozzle head sucks through a Sandzuführleitung from the reservoir by means of a suction blasting. Within the sand blasting housing in the region of the storage container and / or in the side walls of compressed air nozzles are arranged, which are at least briefly acted upon by compressed air via a compressed air valve with compressed air.

Furthermore, from the DE 1 177 033 B a separation and cleaning device for use in dry jet lapping with recycling of the blasting medium, which is moved to the jet mouthpiece by means of a Saugluftrohres known. The blasting medium is aerated in a collecting funnel by air entering through a porous disc forming the bottom of the collecting funnel. The blasting medium is passed from the collecting funnel through a feed tube, which is arranged vertically in the interior of the collecting funnel and opens into the suction air tube, to the jet mouthpiece.

Alles However, these devices have the considerable disadvantage that the blasting agent clumps before being introduced into the blasting device, d. h., the feeder the blasting agent is uncontrolled.

TASK

task The present invention is to improve the supply of the Abrasive.

SOLUTION OF THE TASK

to solution performs this task, that the inlet of the conduit near a wall of the chamber and this is arranged facing.

The Turbulence has the consequence that the abrasive does not clump and very relaxed to the lance and there in the stream of liquid vapor and carrier gas can get. additionally causes the relatively small distance between the inlet and the Wall that not too much blasting material is sucked, causing also a clumping of the blasting agent in the supply line is avoided.

The means that in the chamber a vortex of the blasting medium upright is received and immersed in the chamber a proboscis with the Lance communicates. It is thought that on the one hand the vortex is generated by compressed air in the chamber, but that on the other hand, this compressed air also supplies the blasting agent to the intake manifold. The suction itself then happens by the flow of liquid vapor and carrier gas in the lance, whereby a negative pressure in the suction or a corresponding Line is generated.

The blasting device according to the invention should also leave open the possibility of the blasting device to operate only with liquid vapor or even with blasting agent. In the renovation sector, for example, it may be necessary to work with less fluid. In this case, the steam supply is reduced or switched off completely. In some cleaning processes, it is also thought to first pre-clean with steam, then clean with sand or other abrasive, then nachzusinigen again with steam and finally only to dry with air. All of these possibilities are intended to be encompassed by the present invention.

in the Specifically, the chamber is a means for swirling the blasting medium be assigned. For example, this device may be to swirl the blasting medium to act on a compressed air source.

Of the Field of application of such a blasting device is very diverse. Possible applications are in industry and trade, but especially in dental or goldsmiths and jewelry. Thought is also to the cleaning of dental prostheses of tartar or the Removal of dirt particles in steel prostheses during repairs. Goldsmithing is all about dulling rings and repair work to remove rust and dirt.

in the Industrial area, the blasting device according to the invention, for example used for rust removal and removal of paint layers, as well for cleaning frescoes or for working on stucco. these are only a few lists.

When Blasting agent is, for example, sodium bicarbonate, alumina or plastic beads.

DESCRIPTION OF THE FIGURES

Further Advantages, features and details of the invention will become apparent the following description of preferred embodiment and with reference the drawing; this shows in its single figure a schematic Representation of an inventive Beam device.

The blasting device P has a lance 1 on which with a source 2 for a carrier gas and a source 3 for a liquid vapor in connection. Carrier gas and liquid vapor may be in advance or in the lance 1 be mixed. The mixture becomes as indicated by the arrow 4 marked in the lance 1 from an entrance 5 to a nozzle 6 transported and occurs there as a spray mixture 7 out.

The lance 1 is over a line 8th with a chamber 9 connected, in which a blasting agent 10 located. The abrasive 10 is through an inlet 11 into the pipe 8th brought, with the inlet 11 near a wall 12 the chamber 9 located and this wall 12 is facing. This holds the inlet 11 a very small distance a from the wall 12 one. Further, the inlet 11 at the end of a bent section 13 a riser 14 as part of the line 8th intended.

The chamber 9 is a source 15 for a compressed gas 16 assigned.

The operation of the present invention is as follows:
By the source 15 for compressed gas is compressed gas 16 in the chamber 9 brought in. As a result, the blasting agent 10 in the chamber 9 swirled, so that there is no clumping.

To operate the lance 1 becomes a valve 17 in the lance 1 opened, leaving a mixture of carrier gas and liquid vapor from the inlet 5 to the nozzle 6 can get. This is a negative pressure in the line 8th generated, allowing a suction of blasting agent 10 out of the chamber 9 can be done. This happens through the inlet 11 , the section 13 and the riser 14 , The relatively small distance a between the inlet 11 and the wall 12 causes not too much blasting agent is sucked in, which also causes clumping of the blasting agent in the line 8th is avoided.

The mixture of carrier gas, liquid vapor and blasting agent passes through the nozzle 6 as a spray mixture 7 out.

For example, if you want to clean only with steam, so it is thought, the line 8th between lance 1 and chamber 9 through a corresponding valve 18 to close. The same is also provided for the liquid vapor. This is between admission 5 and source 3 for liquid vapor another valve 19 ,

Claims (2)

Blasting device with a lance ( 1 ) for applying a mixture of blasting agent ( 10 ), Liquid vapor and / or a carrier gas, wherein the lance ( 1 ) via a line ( 8th ) with an inlet ( 11 ) is connected in a chamber in which the blasting agent ( 10 ) and the Chamber ( 9 ) An institution ( 15 ) for swirling and maintaining a vortex of the blasting medium ( 10 ) in front of the inlet ( 11 ), characterized in that the inlet ( 11 ) of the line ( 8th ) near a wall ( 12 ) the chamber ( 9 ) and this is arranged facing. Blasting apparatus according to claim 1, characterized gekenn records that abrasive and liquid vapor separately from the lance ( 1 ) are switchable.