Safety warning device for manhole cover loss

Abstract

The invention relates to the field of municipal facilities and particularly relates to a safety warning device for manhole cover loss. The safety warning device comprises a buffering base, a three-section spring expansion link, a spring plate combination and a warning board; the buffering base is fixedly arranged on a well wall at a wellhead; the three-section spring expansion link is fixedly arranged on a rotating shaft of the buffering base through an intermediate connecting piece; the spring plate combination is mounted on a small-diameter pipe fitting and a large-diameter pipe fitting of the three-section spring expansion link; and the large-diameter pipe fitting is sleeved by the warning board. Compared with other existing warning devices, the safety warning device has the advantages of convenience in mounting and construction, higher safety warning property, no secondary injury and the like because springs, hydraulic energy storage and slow pressure relief are adopted by the buffering base.

Description

technical field [0001] The invention relates to the field of municipal facilities, in particular to a warning device for missing a manhole cover. Background technique [0002] The manhole cover is stolen or lost or washed away by water when the city is flooded, and the exposed wellhead becomes a trap on the road. If there is no necessary warning device before taking preventive measures in time, it will cause great harm to the life and property safety of passing vehicles and pedestrians. In serious cases, there may even be a tragedy of car crash. [0003] After searching by the applicant, it was found that the Chinese patent with the authorized announcement number CN205189009U discloses a "kiln manhole cover loss alarm". Because of the principle of leverage, it requires high sensitivity to the rotation of the lever. In addition, the setting of the counterweight is also troublesome. If the counterweight is light, the length of the lever at this end must be increased. The desi...

AI Technical Summary

Problems solved by technology

[0002] The manhole cover is stolen or lost or washed away by water when the city is flooded, and the exposed wellhead becomes a trap on the road. If there is no necessary warning device before taking preventive measures in time, it will cause great harm to the life and property safety of passing vehicles and pedestrians. In severe cases, there may even be a tragedy of car crash

[0003] After searching by the applicant, it was found that the Chinese patent with the authorized announcement number CN205189009U discloses a "kiln manhole cover loss alarm". Because of the principle of leverage, it requires high sensitivity to the rotation of the lever. In addition, the setting of the counterweight is also troublesome. If the counterweight is light, the length of the lever at this end must be increased. The design defect of the lever is relatively small for the small size of the wellhead. very troublesome

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