HATCH OF INSPECTION PIT OF UNDERGROUND ENGINEERING COMMUNICATIONS

摘要

A hatch of inspection pit of underground engineering communications has a cover and body. The cover has round form, the upper surface of the cover is arranged as flat and has relief made of bosses. On the upper surface of the cover in its center there is a site for marking restricted by circular lug. At the ends of the cover mounting and technological lugs are provided. The body is arranged as a ring and has support section with diameter larger than diameter of the main part of the body. At the upper part of the body slots for fixation of cover are provided. To provide substantial decrease of weight of the device with simultaneous maintaining of its strength, on the lower surface of the cover central disc is provided, its height exceeds height of the main part of the cover. The central disc is connected to the main part of the cover by means of smooth joint. Side surface of the main section of the cover consists of two lugs, at that the height of the upper lug exceeds height of the lower one. The diameter of marking site is 0.3÷0.35 of diameter of the cover. Part of the upper surface of the cover between the circular lug that restricts place for marking and the edge of the cover has inclination that is 2-3°. The body and the cover are made of polymer composition.