MECHANICAL PROTECTION sensors

Mechanical protection of shaft covers solves the problem of closing the shaft cover and prevents its opening without a special excenter wrench. It is adjusted for all cover types and, with the help of a nut, a conical plate can easily be adjusted to a desired height so the necessary protraction force is enabled. This is a completely new product in the field of telecomunication, water meter and sewage shafts protection.The mechanical protection consists of a specially designed prochrome screw, prochrome spring, steel wing screw and self-braking prochrome nut. This system is mounted to the TT shaft cover. A specially designed screw is made of prochrome and its girth suits the M18 nut. Thanks to a specially designed screw head it can be unscrewed with a special excenter wrench only. After installing the spring and the wing screw, a self-braking nut is also fitted to prevent unscrewing of the wing. After assembling the mechanism, a protective rubber ring is fitted inside the screw head in order to prevent dirt from penetrating the head. A steel wing screw is made of 15 mm thick material which makes it extremely hard. When the mechanism is assembled, the wing screw is placed under the metal frame of the shaft cover.A prochrome screw placed on the wing is used as the borderline. When it comes to the cover frame it enables putting the wing screw into the optimal protraction position.This system has proved to be very efficient so far. In this way we have protected about 7200 telecomunication shafts for Serbia Telecom. We have also protected a great number of water meter shafts for Zrenjanin Waterworks, Pancevo Waterworks,&