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Cover-opening warning folding type double-layer antitheft anti-falling manhole cover
The invention relates to a cover-opening warning folding type double-layer antitheft anti-falling manhole cover. An annular base is provided with a circular-ring-shaped upper support platform and a circular-ring-shaped lower support platform, the external diameter of the lower support platform is smaller than the internal diameter of the upper support platform, the upper support platform is hinged to a first upper half edge cover body via an upper turning pin, the first upper half edge cover body is hinged to a second upper half edge cover body via an upper folding pin, the lower support platform is hinged to a first lower half edge cover body via a lower turning pin, the first lower half edge cover body is hinged to a second lower half edge cover body via a lower folding pin, and the upper turning pin and the lower turning pin are respectively arranged at two ends of the annular base in the diameter direction. According to the manhole cover, the opening and maintenance are facilitated, the warning function is reinforced during underground maintenance for personnel, the anti-collision function is provided, the anti-falling function is provided, the structure is simple, the manufacturing cost is low, and the promotion and application prospect is wide.
Cover-opening warning folding type double-layer antitheft anti-falling manhole cover
The invention relates to a cover-opening warning folding type double-layer antitheft anti-falling manhole cover. An annular base is provided with a circular-ring-shaped upper support platform and a circular-ring-shaped lower support platform, the external diameter of the lower support platform is smaller than the internal diameter of the upper support platform, the upper support platform is hinged to a first upper half edge cover body via an upper turning pin, the first upper half edge cover body is hinged to a second upper half edge cover body via an upper folding pin, the lower support platform is hinged to a first lower half edge cover body via a lower turning pin, the first lower half edge cover body is hinged to a second lower half edge cover body via a lower folding pin, and the upper turning pin and the lower turning pin are respectively arranged at two ends of the annular base in the diameter direction. According to the manhole cover, the opening and maintenance are facilitated, the warning function is reinforced during underground maintenance for personnel, the anti-collision function is provided, the anti-falling function is provided, the structure is simple, the manufacturing cost is low, and the promotion and application prospect is wide.
Cover-opening warning folding type double-layer antitheft anti-falling manhole cover
FENG CHENGJUN (author) / JIANG LANLAN (author) / DAI HUI (author)
2015-09-09
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
/
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.