RU213110U1 - MOBILE SHOT Blasting - Google Patents

Abstract

The utility model relates to portable sandblasting devices and can be used for treating surfaces with a stream of abrasive materials created by centrifugal acceleration of a rotating turbine. The mobile shot blasting device contains a turbine made in the form of a housing, a rotor, a feeder and a nozzle for supplying abrasive to the feeder. The device is equipped with a portable small-sized drive, on the shaft of which the specified rotor is fixed. The possibility of moving the turbine in all spatial positions relative to the processed large-sized product is provided. 2 w.p. f-ly, 5 ill.

Description

The utility model relates to portable sandblasting devices, namely shotblasting turbines for surface treatment with a stream of various abrasive materials generated by centrifugal acceleration from a rotating turbine.

A known installation for sandblasting (Fomin A.N., Fomin A.A., Zabuga I.E. Patent of the Russian Federation No. 2518043 C1 IPC B24C 5/04; B24C 7/00; B24C 3/06. Application No. November 30, 2012. Published on June 10, 2014. Bull. No. 16.), containing a sealed container with abrasive particles, the cavity of which is connected to the supercharger by means of a pipe installed at the top of its conical bottom. The supercharger comprises a rotary ring of the housing and a bladed rotor, which is fixed on the rotary base of the cart and mounted on the shaft of the internal combustion engine, while a nozzle is installed in the rotary ring of the supercharger housing tangentially to the circumference.

The disadvantage of this installation is the bulky design, lack of mobility, the impossibility of moving the turbine in all spatial positions relative to the workpiece, in which the product is stationary, and the turbine moves, as well as selective processing of parts of the product (for example, welds).

Shot blast turbine is known (Metelkin V.I. RF Patent No. 2596569 C1 MPK V24S 5/06. Application No. 2015116623/02 of 04.29.2015. Published on 09.10.2016. Bull. No. 25), taken as a prototype, containing a body, inner lining , flange with hub, impeller with blades, impeller, guide sleeve and feed pipe. The impeller consists of three discs connected to each other by means of fingers. The first and second discs are jointly fixed on the hub flange, and the third disc is fixed on the shoulders of the fingers at a distance equal to the blade width. The second and third discs are provided with radial cutouts according to the number of blades, not reaching the edges of the discs and having a width equal to the thickness of the blade. The blades are provided with shoulders that fix them in the cutouts of the disks, and grooves on the side of the turbine axis with embedded spring rings placed in these grooves.

The disadvantage of the prototype, which is a stationary equipment, is a large mass and dimensions that do not provide for the movement of the turbine during operation (the material being processed moves, and the turbine is rigidly fixed in a fixed housing), the impossibility of selective processing of parts of the product (for example, welds), limiting the size of processed products by the dimensions of the installation chamber, design complexity, high power consumption.

The objective of the claimed utility model is to expand the technological capabilities of the turbine and reduce the cost of its manufacture and operation by simplifying the design and the possibility of using various types of abrasives.

The technical result of the claimed utility model is to create mobile portable small-sized equipment, providing for the movement of the turbine in all spatial positions relative to the workpiece (the product is stationary, and the turbine moves), selective processing of parts of the product (for example, welds) and, as a result, increasing the speed of processing the product and reducing the technological costs for it (time and material), processing large-sized products that exceed the size of stationary installations.

This technical result is achieved in that the proposed mobile shot blasting device contains a turbine made in the form of a housing, a rotor, a feeder and a nozzle for supplying abrasive to the feeder, characterized in that it is equipped with a portable small-sized drive, while the turbine rotor is fixed on the shaft of the specified drive. The turbine housing is made of sheet elements in the form of intermediate plates placed between the lower and upper sheets. The rotor is made inseparable from sheet elements in the form of the top sheet of the rotor, the bottom sheet of the rotor and the blade connected by guide pins and spot welded joints.

The utility model is illustrated by drawings

in fig. 1 shows a general view of a mobile shot blasting device;

in fig. 2 - turbine design;

in fig. 3 - turbine, section A-A in Fig. 2;

in fig. 4 - turbine housing;

in fig. 5 - rotor.

The mobile shot blasting device 1 (Fig. 1) contains a turbine 1 fixed on the outer casing of a portable small-sized drive 2. As a drive, various types of small-sized portable drives (hydraulic, pneumatic, electric, internal combustion engine) can be used with a drive shaft speed from 6000 to 30000 rpm The turbine (Fig. 2) consists of a body 3, a rotor 4, a feeder 5 and a nozzle 6 for supplying abrasive to the feeder. Turbine housing 3 is made of sheet elements: upper housing sheet 7 and lower housing sheet 8 and intermediate housing plates 9 placed between them, which also act as a lining (Fig. 4). The housing elements are interconnected by bolted joints 10. The turbine rotor 4 is made integral (Fig. 5), assembled from sheet elements: the top sheet of the rotor 11, the bottom sheet of the rotor 12 and blades 13, connected by guide pins 14, fixed by spot welded joints. The rotor 4 is fixed on the drive shaft of a small-sized portable drive 2 using a standard mount.

The device works as follows.

When the valve of the feeder 15 is opened, the abrasive is fed into the installation through the abrasive supply pipe 6 to the feeder 5, where the amount of abrasive supplied to the turbine 1 is regulated depending on the type of abrasive. The abrasive supply from the feeder is adjusted manually by the operator according to fixed settings using the feeder valve 15. From the feeder 5, the abrasive enters the rotating rotor of the turbine 4, and under the action of centrifugal force is ejected from it with an initial linear speed of the thrown abrasive particle ranging from 60 m/s up to 150 m/s, which is comparable to the initial particle velocity in both sandblasting and shot blasting machines.

The proposed mobile shot blasting device allows for shot blasting (sandblasting) cleaning of metal structures and welds to obtain a surface after processing from Sal to Sa3 in accordance with the requirements of GOST R ISO 8501-1-2014, light blasting (sweeping) of metal and non-metal products (structures ), create a matte layer on polished metal surfaces and non-metallic materials (glass, ceramics, etc.).

When carrying out surface treatment using the proposed mobile shot blasting device, it is possible to use the following main types of abrasive:

crushed steel shot fractions from 0.12 mm to 1.0 mm;

cooper slag fraction from 0.125 mm to 2.5 mm;

nickel slag fraction from 0.125 mm to 2.5 mm;

quartz sand fraction from 0.4 mm to 1.25 mm.

It is possible to use other types of abrasive comparable in terms of physical, technical and weight-dimensional parameters with those listed above.

Sources of information

1. Fomin A.N., Fomin A.A., Zabuga I.E. RF patent No. 2518043 C1 IPC V24C 5/04; B24C 7/00; B24C 3/06. Application No. 2012151241/025 dated 11/30/2012. Published on 06/10/2014. Bull. No. 16.

2. Metelkin V.I. RF patent No. 2 596 569 C1 IPC V24C 5/06. Application No. 2015116623/02 dated 04/29/2015. Published on 09/10/2016. Bull. No. 25.

Claims (3)

1. A mobile shot blasting device containing a turbine made in the form of a housing, a rotor, a feeder and a nozzle for supplying abrasive to the feeder, characterized in that it is equipped with a portable small-sized drive, while the turbine rotor is fixed on the shaft of the specified drive. 2. Mobile shot blasting device according to claim 1, characterized in that the turbine housing is made of sheet elements in the form of intermediate plates placed between the lower and upper sheets. 3. Mobile shot blasting device according to claim 1, characterized in that the rotor is made integral of sheet elements in the form of connected by guide pins and spot welded joints of the upper sheet of the rotor, the lower sheet of the rotor and the blade.

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