Multiple anti-theft device of petrol station oil tank dip hatch
A technology of anti-theft device and metering port, which is applied to underwater structures, building structures, building locks, etc., can solve problems such as hidden safety hazards, loss of property and economic benefits, and achieve reduced losses, good anti-theft functions, and broad application prospects. Effect
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[0016] As shown in Figure 1, the present invention consists of a base 1, an upper cover plate 2, and a lock 3. The basic shape of the base plate is circular, with a through hole in the center. Between the flanges, it is fixed with bolts 5, and the base and the upper cover are connected with hinges 6. The upper cover plate is provided with an upper lock groove 21 , and the base is provided with a lower lock groove 12 .
[0017] As shown in Figure 2, the chassis is symmetrically provided with two "ears" 13 extending outwards from the circumference. Right-angle chamfering 15, the lower lock groove 12 at the right-angle bend is corresponding to the upper lock groove 21 of the upper cover plate, and the outward openings of the upper lock groove and the lower lock groove are concave grooves (not shown in the figure), and the lower lock groove The upper wall of the lock groove is provided with a lock bolt through hole 121 and a positioning hole 122 between the upper cover plate and ...
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