SU1454672A1 - Apparatus for shot-blasting stripping of outer surface of elongated articles - Google Patents

Abstract

The invention relates to the cleaning of pipes, calibrated rolled products and can be used in the construction of trunk pipelines and in machine-building enterprises. The invention makes it possible to increase the processing intensity due to the pulsed feed of the working agent. The rotor has radially located sly nozzles 4, made in the form of a wedge with an extension to the center of the rotor. The width of the slit nozzles, 4 in their narrow part is smaller than the diameter of the balls, which excludes they are popping out of the rotor I; the annular chamber-7 is divided by longitudinal partitions 10 into cavities 11, which are interconnected by an annular slot for supplying compressed air to them. When the slit-like nozzles 4 coincide with the cavities 11 of the annular chamber receiver 7, the fraction under the action of air flows out of the nozzles and flies towards the treated surface, hits it and cleans it. 2 silt, jbA i (L sd 4 05 ft

Description

FIG. 2

1145

1 The invention relates to the mechanical processing of products, namely the cleaning of pipes, calibrated rolled products, and their use in engineering construction, as well as in other areas where it is necessary to {) lengthy-length products.

The aim of the invention is to increase the intensity of the treatment due to; 1 pulse supply of the working agent.

In Fig.1 schematically depicts the described device, a longitudinal cut; figure 2 - section aa on

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A device for bead-blasting cleaning the outer surface of products contains a rotating rotor 1 for rotation. in it working bodies, such as steel balls, and the workpiece 2, the rotation of the rotor 1 is connected with the turbine 3 fixed on it. The rotor has radially arranged slit nozzles 4 through which compressed air enters the working area of the rotor. The width of the slit-like nozzles 4 in their narrow part is smaller than the diameter of the balls, which prevents them from spinning out of the rotor. In the ends of the rotor there are bushings 5 and 6 in which there are holes (not shown) for filling the rotor with balls. The rotor 1 is installed in an annular chamber (receiver) 7 by means of bearings 8 and 9. The annular chamber (receiver) is divided by longitudinal partitions 10 into: cavities 11 interconnected by an annular slot 12 for supplying them

compressed air.

A device for shot blasting cleaning the outer surface of long products works as follows.

Before starting the operation, the rotor 1 is filled with steel balls through holes (not shown) located in sleeves 5 and 6, then a workpiece is introduced into the rotor, for example a pipe 2. Compressed air is supplied to the turbine 3, which is. causes the rotor 1 to rotate. Working bodies, for example steel balls located in the inner surface of the rotor, are rotated and under the action of centrifugal forces force the following: slit nozzles 4, When compressed air is fed into the annular gap 12,

0

15

- 20 75

thirty

35

When the receiver is hollowed through a cavity 11, the latter are filled with air.

When the slit-like nozzles 4 coincide with the cavities 11 of the annular chamber 7, under the action of air streams coming out of the const 4, the flight flies towards the surface to be treated, hits it and cleans it. With further rotation of the rotor 1, the slit-like nozzles 4 overlap with the longitudinal partitions 10 of the annular chamber 7, and the fraction reflected from the surface being worked out under the action of centrifugal forces and impact energy collects from the inner surface of the rotating rotor and accumulates at the slit-like nozzles 4. the process is repeated.

To prevent the cleaning products from getting into the nozzles 4 and seizing the rotor 1 with longitudinal partitions. 10 an annular chamber 7 between the outer surface of the rotor and the partitions 10 provides a technological gap that provides air with low flow and, accordingly, low pressure to the nozzles 4 during their passage through the partitions 10, which prevents the cleaning products from falling into the nozzles but does not interfere with the accumulation of shot, the removal of cleaning products occurs together with the exhaust air in the gaps formed by the processed No. 1m product 2 and the sleeves 5 and b,

Claims (1)

Invention Formula A device for the shot blasting of the outer surface of long products containing a rotor covering the product with radial nozzles connected to a receiver connected to a source of compressed air, which differs from the fact that, in order to increase the processing intensity due to the pulsed supply of the working agent, the radial the nozzles are made slit-like in the form of a wedge with an extension to the center of the rotor, which is mounted coaxially in the receiver housing, on the inner surface of which the longitudinal cavities are made.