Hinged manhole cover-grate device

Abstract

The device belongs to a hinged manhole cover-grate device applied in the underground pipeline, trench, and route staple shafts; the hinged manhole cover-grate device with the cover surface only having lift holes is used for sealing the staple shaft cover; the hinged manhole cover-grate device with the grated-hole cover surface is used for sealing the draining staple shaft; the hinged manhole cover-grate device mainly comprises a manhole cover, a grate and a cover frame, mainly solves the problems of missing manhole cover-grate, and can provide anti-displacement and pedestrian anti-fall functions; the manhole cover, the grate and the cover frame are hinged by a hinge structure mainly comprising a hinge groove, a hinge block and a pin shaft, thus providing anti-missing function; a limit block is arranged in the hinge groove; in addition, a manhole cover notch and a cover frame notch are provided; a rotary shaft penetrates the manhole cover notch and is fixed with a half-circle block, both of which are provided with anti-displacement function; a lower cover frame and a lower manhole cover-grate are arranged under the cover frame; a plurality of uneven hooks are arranged below the manhole cover-grate; the cover frame is also provided with notches matched with the hooks; the lower cover frame and the lower manhole cover-grate are hinged by a lower hinge structure mainly comprising a lower hinge groove, a lower hinge block and a lower pin shaft, and said structures respectively have anti-falling function.

Description

technical field [0001] The device belongs to the well cover and grate device for underground pipelines, ditches, lines and other underground wells. Background technique [0002] Most of the existing articulated well covers and grate devices for underground wells such as pipelines, ditches, and lines are hinged by the well cover and the cover seat by a hinged structure, which plays the role of sealing the hidden well and not hindering traffic and pedestrians. Manhole covers and grates have a better anti-separation effect. Most of the designers and manufacturers of the manhole cover and grate device with hinged structure are designed to form an obtuse angle larger than a right angle with the cover seat when the manhole cover and grate are turned over, so that the manhole cover will not fall freely and reset, so that professional maintenance personnel can work in the well. When the well cover is closed, the well cover is often lifted up beyond the free fall angle due to the hi...

AI Technical Summary

Problems solved by technology

Most of the designers and manufacturers of the manhole cover and grate device with hinged structure are designed to form an obtuse angle larger than a right angle with the cover seat when the manhole cover and grate are turned over, so that the manhole cover will not fall freely and reset, so that professional maintenance personnel can work in the well. When the well cover is closed, the well cover is often lifted up beyond the free fall angle due to the high water vapor pressure in the dark well and cannot be reset by free fall, resulting in the full opening of the dark well; and the damage and loss of the well cover and grate for various reasons will also cause the dark well to be fully open, resulting in Pedestrians accidentally fall down the well when passing by, causing casualties and vehicle wheels falling into the well, causing vehicle damage accidents

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