Anti-loose bolt device

Abstract

The invention discloses an anti-loose bolt device and a use method thereof. The anti-loose bolt device comprises a non-return flange bolt (1), a non-return gasket (2), a through hole part (3), a disassembly compression ring (4) and a threaded hole part, wherein the non-return flange bolt (1) comprises a flange section (11) and a screw (13) connected with the lower end of the flange section (11); the screw (13) is sleeved with the non-return gasket (2), the upper end of the non-return gasket (2) is provided with upper teeth (21), the lower surface of the flange section (11) is provided with non-return grooves (112) matched with the upper teeth (21), and the lower end of the non-return gasket (2) is provided with lower teeth (22); the through hole part (3) is arranged on the screw (13) in asleeving manner and located at the lower end of the non-return gasket (2), and the upper surface of the through hole part (3) is provided with through hole part groove bodies (31) matched with the lower teeth (22); the lower end of the screw (13) is connected with the threaded hole part; and the flange section (11) is sleeved with the disassembly compression ring (4), and the disassembly compression ring (4) can move up and down relative to the flange section (11). The anti-loose bolt device has a good anti-loose effect at high temperature and high frequency, the strength of the bolt is high,and the anti-loose bolt device has the advantages of being convenient to disassemble, energy saving and environment friendly.

Description

technical field [0001] The invention relates to the technical field of industrial fasteners, in particular to an anti-loosening structural bolt. Background technique [0002] In the equipment manufacturing industry, the bolted connection structure is widely used. The internal operating environment of the steam generator of the nuclear island equipment of the nuclear power plant is harsh, the temperature of the heat exchange gas reaches 200-500 ° C, and the flow rate is as high as 30 m / s. The bolts and screw holes used for sealing and fastening internal components will thermally expand at high temperatures, and the high-speed flow of heat exchange gas will cause high-frequency vibrations, which will release the pre-tightening force of the bolts and reverse the threads. Once the bolts become loose, the bolts and equipment will be damaged. The loosening of the bolts during the operation of the nuclear power plant steam generator is difficult to predict, ranging from shutting do...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. The welding consumables and welding process used for the welding of bolts and fasteners require strict welding tests, and non-destructive testing is required after welding, which is time-consuming and labor-intensive; Uniform welding to multiple points, the structure of the internal components of the steam generator is complicated, and the internal space is narrow, which is not convenient for welding; 3. When the bolts are removed, they will be scrapped, and new bolts need to be remade, which increases the cost; Grinding or cutting bolts requires high cleanliness inside the steam generator, and the iron filings generated by grinding will pollute the interior

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