Antitheft manhole cover with special opening and locking device

Abstract

The invention discloses anti-theft manhole cover, which consists of maphole cover with lock device, support base and special key. The lock device consists of a T stand lock core with a key-hole, bolt, boss, cross-pin; the special key consists of expanding wall, expanding core and handle. The lock device is simple which prevents the silt jamming with a handily installation and application. Workers will not be interfered after the cover is open for maintenance construction. There is no open hole and gap on the cover and the base. The cover and base associate tightly and is strongly anti-picking, anti-corrosion, anti-foul-release, and anti-frostbite so that rain water, silt and waste will not easily enter the observer well. The cover can not be opened without the special key so to prevent the underground wire facility from damaging, stolen.

Description

technical field

[0001] The invention relates to an anti-theft inspection manhole cover applied to various underground pipeline inspection wells, in particular to an anti-theft manhole cover which is simple in structure, easy to install and use, but can only be opened with a special opener. Background technique

[0002] Manhole covers of various underground pipeline inspection wells in cities are stolen from time to time, and incidents of personal casualties, vehicle damage, and underground pipeline facilities being stolen and damaged are also commonly reported, resulting in huge losses. Various types of anti-theft manhole covers designed and produced to prevent the manhole cover from being stolen have emerged as the times require. There are hinges or chains to connect the manhole cover and the support together; Check the manhole cover. Though certain anti-theft effect is arranged, still can not effectively prevent well cover from being stolen. Thieve...

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