Safety warning device for manhole cover loss
A safety warning and manhole cover technology, which is applied in water conservancy projects, artificial islands, underwater structures, etc., can solve problems such as troublesome setting of counterweights, car crashes, and hazards to the lives and property of passing vehicles and pedestrians. Easy installation and construction, high safety warning effect
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[0024] Refer to attached Figures 1 to 5 A safety warning device for manhole cover loss of the present invention will be further described.
[0025] A safety warning device for manhole cover loss includes a buffer base 1, a three-section spring telescopic rod 2, a spring leaf combination 3, and a warning sign 4. The buffer base 1 in this embodiment is generally a cuboid structure, such as figure 2 As shown, there is an ear plate on the two short sides of the base, and there are several through holes on each ear plate, which are used to fix the base to the well wall through expansion screws. The two long sides of the base are respectively A stopper is provided, and it is used together with the leaf spring combination 3 as a trigger switch. The cushioning principle of the base is as follows image 3 As shown, the rotating shaft is located on the gear. When the rotating shaft rotates counterclockwise under the action of external force, the gear drives the rack to move to the r...
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