Magnetic anti-theft screw cap and dedicated wrench

Abstract

The invention provides a magnetic anti-theft screw cap and a dedicated wrench. The magnetic anti-theft screw cap comprises a screw cap body and a screw cap protective sleeve body, wherein the screw cap body is rotatably placed in the screw cap protective sleeve body through a clamping structure; a plurality of upper radial limiting grooves are formed at intervals in the lower end face of the screw cap body circumferentially; the outer side face of the screw cap protective sleeve body is in a shape of an equilateral polygon; a lower end port of the screw cap protective sleeve body extends axially in a protruding mode, so that a ring shoulder is formed; the ring shoulder is adjacent to the lower end face of the screw cap body; a plurality of lower radial limiting grooves are formed at intervals in the upper end face of the ring shoulder circumferentially; a radial limiting sliding block made from a magnetic metal material is embedded in each lower radial limiting groove; all the lower radial limiting grooves can correspond to the upper radial limiting grooves; the bottom of each radial limiting sliding block is connected with an elastic limiting device fixed on the ring shoulder; and the special wrench is applied to the magnetic anti-theft screw cap. The magnetic anti-theft screw cap and the wrench have an anti-theft function, can reduce the rate of parts of being stolen and overcome defects in the prior art.

Description

technical field [0001] The invention belongs to the technical field of anti-theft nuts, and in particular relates to a magnetic anti-theft nut and a special wrench. Background technique [0002] In oil extraction, a considerable number of oil wells in oil fields are located in relatively remote and sparsely populated places. For such oil well sites, it is impossible to be guarded 24 hours a day. For the detachable facilities on site, as small as valve handwheels, large When it comes to the balance weight and motor on the oil extraction machine, theft accidents happen from time to time. Such incidents not only cause the loss of the value of the stolen objects, but also seriously affect the normal production of oil fields and bring huge losses to the country. [0003] In addition, cars have gradually become the daily necessities of ordinary people in Chinese cities, but car tires are unprotected and easy to disassemble, leaving opportunities for criminals, and car tires are o...

AI Technical Summary

Problems solved by technology

Such incidents not only cause the loss of the value of the stolen items, but also seriously affect the normal production of oil fields and bring huge losses to the country.

[0003] In addition, cars have gradually become the daily necessities of ordinary people in Chinese cities, but car tires are unprotected and easy to disassemble, leaving opportunities for criminals, and car tires are often stolen

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