Lance of a cleaning kit for medium-voltage power devices

A lance of a cleaning kit for medium-voltage power devices, wherein said lance is equipped with an external assembly and an internal assembly placed therein, wherein the external assembly comprises a head with a first clamp for connection to an anti-frosting gas, and a second clamp for connection to a cleaning gas, mounted in from a front, and a body, wherein the head is connected to the body, said body being detachably connected to an extension, said extension being detachably connected to a dispensing nozzle at an end opposite to the body;

• wherein inside the external assembly there is an anti-frosting gas flow channel, connected to the first clamp,
• wherein the internal assembly comprises a first sleeve located axially in the body which creates a cleaning gas flow channel and is connected to the second clamp;
• wherein the head has a form of a solid of revolution, and in a cylindrical part, the first sleeve is shaped in a form of a bulb, inside which an openwork baffle is installed transversely,
• wherein from a side of a connection with the extension, on an inner surface of the first sleeve of the body, there is a threading matching a threading on an outer surface of a tip of the extension, creating a tight coupling of the extension with the body, secured from outside with a “press-fit” fastening of an outer wall of the extension;
• wherein the body, at the place of attachment, has a recess over which a ring is mounted, covered with a flange,
• wherein said dispensing nozzle in its initial section, near the extension, has the form of a second sleeve, which at a certain distance from the place of connection with the extension turns into a flattened solid with side walls diagonally diverging to the sides, and is open at an end,
• wherein inside the dispensing nozzle there is a third sleeve which constitutes a continuation of the cleaning gas flow channel which the second sleeve narrows towards a point and then widens,
• wherein said widening walls of the third sleeve run parallel to the diverging walls of the second sleeve, and
• wherein the flattened surface of the dispensing nozzle is angularly bent, forming angularly bent walls, and wherein the angularly bent walls are perpendicular to the second sleeve and the third sleeve, in cross-section, and form a closed circuit of the cleaning gas flow channel surrounded by an area of the anti-frosting gas flow channel.