DD285130A5 - DEVICE FOR ELECTROLYTIC DECONTAMINATION AND DECONSTRUCTION IN THE TAMPON METHOD - Google Patents

Abstract

The invention relates to a device for electrolytic decontamination and descaling in the tampon process, which is used in heat energy systems, preferably in nuclear power plants. The object of the invention is to provide a lightweight, universally applicable device can be electrolytically cleaned with the scale and radioactively contaminated Metallloberflaechen of equipment of different surface geometries. The aim is to ensure low residence times in the radiation field, to avoid contact with accumulated contaminants and the penetration of chemicals into equipment that is not intended for this purpose. According to the invention, this is achieved by combining the electrode head with a U-shaped or V-shaped steel sheet acting simultaneously as an electrolyte chamber, a spring-loaded retaining wedge, the tampon fastened therebetween and necessary insulation pieces. The spring-loaded retaining wedge clamps the tampon material in the electrode head, wherein the electrolyte is conveyed by means of an electrically operated pump from an electrolyte storage container attached to the device into the working zone. {Decontamination; Electrolysis; Tampon procedures; Metalloberflaeche; Electrolyte chamber; Retaining wedge, spring loaded}

Description

Field of application of the invention

The invention relates to a device for the electrolytic decontamination and descaling of small metal surfaces according to the principle of the electrolytic tampon. It can be used in heat energy plants, preferably in nuclear power plants.

Characteristic of the known state of the art

For electrolytic decontamination and descaling tasks on metal surfaces, various transportable tampon electrodes have been developed. The prior art generally corresponds to a plate-shaped electrode head with or without joint, as described in DD 254400. Such tools are well suited for flat cleaning objects, but their application encounters difficulties for complicated geometries.

Also known electrodes with externally arranged electrolyte reservoir, such. B. CS-PS 237628. These devices are designed for the use of larger amounts of electrolyte, equipped with appropriate hose connection lines and already designed relatively expensive.

A disadvantage of the known state of the art is that all described electrode versions provide no possibility for the Strahlwerktätigen to be able to interrupt the electrolysis in case of need quickly and safely. Another disadvantage is that the previously known and applied mounting mechanisms do not allow a wide range of variation for the applicable layer thickness of the tampon.

Object of the invention

The object of the invention is to provide a lightweight, universally applicable device with which scaling and radioactively contaminated equipment of different surface geometries can be electrolytically cleaned. The aim is to ensure low residence times in the radiation field, as well as to avoid contact with accumulated contaminants and the ingress of chemicals into equipment parts not intended for this purpose. Furthermore, the device should clean more complex shaped scaled steel surfaces quickly to the bare base metal and allow for this purpose the secure mounting of pad materials of different thickness.

Explanation of the essence of the invention

The invention has for its object to design a working in the electrolytic pad process device so that complicated surface geometries of the cleaning object can be decontaminated or descaled by a specially designed electrode head with fast replaceable tampon, wherein power and electrolyte supply of the working zone from the operator of the device controllable should be.

According to the invention the object is achieved in that the electrode head composed of a simultaneously functioning as an electrode chamber U- or V-shaped steel sheet, a spring-loaded retaining wedge, the tampon secured therebetween and necessary insulation pieces.

Also attached to the apparatus is an electrolyte reservoir having an electrically driven pump connected by a hose to the work zone.

In the pistclan-shaped handle of the device are a button and a switch through which the electrolyte supply to the electrode head or the pulsating direct current for the electrolysis on or off, arranged.

embodiment

The invention will be explained below with reference to an exemplary embodiment.

In the figure 1, the device is shown in vertical section and in the figure 2 in horizontal section.

The made of an electrically non-conductive material electrode head 1 is connected by a tube 2 with the handle 3. On the tube 2, a Elektroiytvorratsbehälter 4 and a pump 5 are attached. By located in the pistol-shaped handle 3

Button 6 and switch 7, the electrolyte supply to the electrode head 1 and the pulsating direct current for the electrolysis on or off. From the electrolyte reservoir 4, a tube 8 extends through the tube 2 to the electrode head 1. In the electrode head 1 is a cavity, which ensures the distribution of the electrolyte and thus the uniform wetting of the tampon material 9. The pad material 9 is stretched by a retaining wedge 10 in the electrode head 1 V-shaped. To insert the tampon material 9 of the support wedge 10 is deflected by means of the rod 11 and withdrawn with the spring 12 again.

Claims (1)

Apparatus for the electrolytic decontamination and descaling of small metal surfaces in the tampon process, characterized in that the electrode head (1), which is V-shaped or U-shaped, with a spring-loaded retaining wedge (10), the tampon material (9) in the electrode head (1) is clamped, wherein the electrolyte by means of an electrically operated pump (5) from an attached to the device electrolyte reservoir (4) is conveyed into the work zone and that in the pistol-shaped handle (3) of the device, a button (6) and a switch (7), through which the electrolyte supply to the electrode head (1) or the pulsating direct current for the electrolysis on or off, are arranged. For this purpose 1 page Zeichr. jngen