SU1356521A1 - Apparatus for jet etching of elongated cylindrical articles - Google Patents

Abstract

The invention relates to equipment for the chemical treatment of metals and can be used for the chemical treatment of the outer surface of heat-generating elements for atomic reactors. The purpose of the invention is to improve the quality of the treated surface {1 of the product and the intensification of the etching process. The trap solution is fed through the inlet 13 into the dispensing manifold 11 of the beam 5. Next, the solution goes through the tangential passage of the hole 12 into the adjacent lower injection chambers 9. The spiraled spiral-shaped streams of the pickling solution are formed, moving from the lower injection chambers 9 to the upper working chambers 8. This ensures a smooth, constant supply of fresh mortar directly to the surface of the product 4, - located in the zone of the working chambers 8 / L of the bar 5, and instantaneous removal as reaction products formed as a result of the etching process, with surface-to-carry products 4 and gaseous products. 3 cl. SO ate 05 JV Yu

Description

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The invention relates to Hino equipment for chemical treatment of metal-rfbB and can be used for continuous etching of the outer surface of products, in particular, from zirconium alloy shells for heat-generating elements for atomic reactors.

The aim of the invention is to improve the quality of processing and intensify the etching process.

FIG. 1 shows the proposed device in section in FIG. 2 shows section A-A in FIG. 1 j in FIG. 3 - Mathematically shows the flow of the working fluid. Bones.

The device comprises a rectangular shaped chamber 1, in the opposite side walls 2 of which there are coaxially apertures 3, serving for supplying and discharging the processed section 4, a distribution node, made in the form of a bar 5 with a through channel 6 for passing the product 4 and mounted NL support stands 7. At the same time, in the beam 5. a number of working chambers 8 and pressure chambers 9 are made, while the working chambers 8 are made in the upper part of the beam 5, interconnected by a slot 10 and intersect the through channel 6, and the pressure chambers 9 They are located in the lower part of the beam coaxially with the working chambers 8, each pair of injection chambers connected to a distribution manifold 11 by tangential passage holes 12 symmetrically located relative to the pressure chamber 9, where a float spiral-like flow of pickling solution is formed, moving from the bottom the discharge chamber 9 into the upper working chamber 8. Simultaneously with the supply of the solution, the product 4 is transported by means of the use of rollers 15 along the beam 5 through the upper working wheels EASURES 8, where etching occurs outside surface 4 of the article, spent etching solution from the working chamber 8 enters the chamber 1, which is removed through the spout 14.

The design features of the device allow the processing of the product D. at the transverse ramp on it of a high-speed vortex flow of the pickling solution, which is formed in the upper working surfaces. measures 8. High-speed flows are highly turbulent, therefore the transfer of the herbal component is due to turbulent diffusion and convective transfer. At the same time, the rate of chemical reaction increases due to the intensive supply of etching components to the surface of the product 4. The speed increase also contributes instantaneously. removal of reaction products. pickling slags, which are due to the high flow velocity

The og of the solution is rapidly diluted and removed from the reaction zone.

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This allows you to intensify the processing of the product by 1.4 times the through channel that connects, while improving the quality of processing for the adjacent working chambers B, On the beam 5, the inlet 13 is set to reduce the irregularity, and the bottom of the chamber 1 - drain pipe 14, to ensure the removal of the spent solution. At the entrance and exit of the camera 1, there are mounted pulleys 15 that serve to rotate and move the product 4 at a certain speed. All elements of the device are made of acid-resistant material.

The device works as follows.

Etching pacTgop is fed through the inlet 13 to the dispensing manifold 11 of the beam 5, from where the solution is fed through the tangential through holes 12 at a certain speed and with a given direction to the bottom

null blower chamber 9, where the formation of a float spiral flow of pickling solution takes place, moving from the lower discharge chamber 9 to the upper working chamber 8. Simultaneously with the supply of solution, the product 4 is transported by pulling pulleys 15 along the beam 5 through the upper working chambers 8, where the etching of the outer surface of the product 4 occurs. The spent pickling solution from the working chambers 8 enters the chamber 1, from where it is removed through the drain nipple 14.

The design features of the device allow the processing of the product D. at a transverse ramp on it of a high-speed vortex flow of pickling solution formed in the upper working chambers 8. High-speed flows are highly turbulent, therefore the transfer process of the grass component occurs. due to turbulent diffusion and convective transfer. At the same time, the rate of chemical reaction increases due to the intensive supply of etching components to the surface of the product 4. The speed increase also contributes instantaneously. removal of reaction products. pickling slags, which are due to the high flow velocity

the solution rapidly dissolves and is removed from the reaction zone.

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sloth in the cross section of the product in, t. 3.2 times and in length - 1.5.2.25 times.

Formula

A device for jet etching of long cylindrical articles, comprising an etching chamber with openings for input and output of products, a distribution assembly made in the form of a bar with a through channel for passing the product and a distributing collector, and a mechanism for rotating and transporting the product about l and h h with the aim of increasing the quality of processing and intensifying the etching process, it

equipped with a number of working and injection chambers made in the beam, while the working chambers are made in the upper part of the beam, interconnected and cross the through channel for the passage of the product, and the discharge chambers are made in the lower part of the beam

coaxially with pa6o4f {MH chambers, each of which a pair of supercharged chambers are connected to a dispensing manifold by tangential bore holes, symmetrically located gi relative to the through channel connecting the adjacent working chambers.

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FIG. one

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FIG. 2

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Claims (1)

Claim A device for jet etching of long cylindrical products, containing an etching chamber with openings for input and output of products, a distribution unit made in the form of a bar with a through channel for passing the product and a dispensing manifold, and a mechanism for rotating and transporting the product, from the tangential the through holes 12 with a certain speed and with a given direction are fed to the lower one in that, in order to improve the quality of processing and intensify the etching process, it is equipped with a number of p side and discharge chambers made in the beam, while the working chambers are made in the upper part of the beam, interconnected and intersect the through channel for the passage of the product, and the injection chambers are made in the lower part of the beam coaxially with the working chambers, each pair of pressure chambers is connected to by a distributing collector with tangential passage holes symmetrically located relative to the through channel connecting adjacent working chambers. I FIG. 1 Fie.Z