SU1731616A1 - Shot blasting apparatus - Google Patents

Abstract

Use: when processing surfaces with shot, in particular for strengthening, cleaning and preparing surfaces for coatings. In order to prevent the shot from caking and the injection of the shot to the s nozzle, the compressed air flows from the pneumatic main to the nozzle 3 installed in the bottom of the shot collector 2. forming a high-speed jet at the nozzle exit directed to the nozzle 7 of tray 6 and further to the accelerating nozzle 4. The compressed air jet, moving at high speed through the nozzle hole, ejects the fraction supplied to the input ends of the nozzle 7 of the tray 6 and the accelerating nozzle 4. In the latter, the shot is intensively mixed with a jet of compressed air, and the acceleration and direction of the formed shot-air stream is directed onto the surface of the product being processed. The shot reflected from the surface of the product rolls down into the shotgun 2 from where it is again ejected by a stream of compressed air. In this part of the fraction along the arcuate concave tray 6 enters the input end of the accelerating nozzle 4, and the rest of the fraction, rolling down the walls of the grabber 2, flows to the input end of the nozzle hole 7 through the gap formed between the tray and the bottom of the grater 2. 2 Il. sl C

Description

The invention relates to the treatment of surfaces with a shot, in particular, to shot blasting devices for strengthening cleaning and preparing surfaces for coatings.

The aim of the invention is to improve the performance and reliability of the device.

FIG. 1 shows a device, a longitudinal section: FIG. 2 is a section A-A in FIG. one.

A device for shot blasting of products comprises a working chamber 1 with a lower shotgun 2 installed at the bottom of the chamber. The nozzle 3 and the accelerating nozzle 4 located coaxially with each other are mounted at the bottom of the shotgun 2 The accelerating nozzle 4 is installed with the possibility of relative axial movement in the threaded sleeve 5. fixedly fixed by means of pins on the body of the shotgun.

 In the crusher 2 between the nozzle 3 and the accelerating nozzle 4 is placed arcuate concave tray 6. in the central part of which there is a nozzle hole 7 located coaxially with the nozzle and the accelerating nozzle. Tray 6 is installed with the possibility of axial movement and is placed between the nozzle and the accelerating nozzle and fixed to the lower end of the accelerating nozzle 4 by means of screws 8 with the formation of adjustable channels 9 and 10 for supplying the shot to the lower input ends of the accelerating nozzle and the nozzle hole 7.

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To regulate the width of the gaps (channels), for supplying the shot, the accelerating nozzle 4 and the tray 6 are interconnected by threaded elements 8. The accelerating nozzle is also installed in the threaded sleeve 5 for rotation and axial movement,

The device works as follows.

During processing, the product being processed is continuously moved through the working chamber 1. At the same time, compressed air enters the nozzle 3 and forms a high-speed jet at the nozzle exit directed to the nozzle hole 7 of the tray 6 and then to the accelerating nozzle 4. Compressed air jet moving at high speed through the nozzle hole, ejects the fraction supplied to the inlet ends of the cop aperture 7 of the tray 6 and the accelerating nozzle 4. In the latter, the shot is intensively mixed with the jet compressed air, acceleration and direction of the formed shot-air jet onto the surface of the product being processed.

The shot reflected from the surface of the product rolls down into the dust collectors 2, from where it is again ejected by a stream of compressed air. At the same time, a fraction of the fraction through the arcuate concave tray 6 enters the input end of the accelerating nozzle 4. and the rest of the fraction, which rolls along the walls of the core bore 2, flows to the input end of the nozzle hole 7 through the gap, forming

bath between the tray and the bottom of the crusher 2.

The presence of an arcuate concave tray with a central nozzle hole located between the nozzle and the booster nozzle in the shotgun provides additional injection of shot into the energy carrier stream, thus avoiding blocking of the feed channels by the shot and its tracking in the shotgun. As a result, the uniformity of injection of the shot into the accelerating nozzle increases, which significantly increases the reliability of the device, the productivity and the quality of processing of the product.

Claims (1)

Invention Formula A device for shot blasting of articles containing a working chamber with a bottom shotgun, in the bottom part of which the accelerating nozzle and nozzle are mounted coaxially and with the possibility of relative axial movement. in order to improve performance and reliability in operation, it is equipped with an arcuate concave tray with a nozzle hole in its central part, installed by a nozzle and an accelerating nozzle with axial movement from the formation of channels for supplying the shot with it, and the tray with its nozzle hole is located coaxially with the nozzle and the accelerating nozzle. F 222ZZ JZZZZ2ZZZ2 Z; -SS27722ZZ 2zЈ cssssssssssssxsss e- " i Szh Lyph Phage.}