Magnetorheological and latch integrated locking device

By integrating magnetorheology and pin locking devices, and combining magnetorheological fluid bladders and pin mechanisms, the stress concentration and locking reliability problems of existing tube pulling machine clamping and locking devices are solved, achieving stable and safe locking of the connector tube and adapting to the clamping requirements of different working conditions.

CN122584205APending Publication Date: 2026-08-18YAXIA NATIONAL HYDROPOWER TECHNOLOGY INNOVATION CENTER CO LTD +2
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Patent Information

Application Number
CN202610762198.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-29
Publication Date
2026-08-18

AI Technical Summary

Technical Problem

Existing pipe pulling machines have problems with clamping and locking devices, such as rigid clamping leading to stress concentration and damage to the joint pipe, low locking reliability, and poor adaptability. In particular, it is difficult to achieve stable and safe locking during alternating pulling processes.

Method used

The device employs an integrated locking mechanism combining magnetorheology and pins. By combining the magnetorheological mechanism and the pin mechanism, it achieves uniform clamping in the entire circumference through the flexible fit of the magnetorheological fluid bladder and the mechanical engagement of the pin, providing continuous clamping pressure. The magnetic field strength and clamping force are adjusted by the excitation coil to adapt to different working conditions.

Benefits of technology

It achieves uniform fit of the connector tube in all directions, eliminates stress concentration, prevents slippage and accidental falling, improves locking reliability and adaptability, and ensures the reusability and safety of the connector tube.

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Abstract

The application discloses a magnetorheological and latch integrated locking device, which comprises at least one clamping arm installed on a pipe pulling machine and used for locking a joint pipe, the clamping arm comprises oppositely installed first and second arc-shaped arms which are hinged, and a second telescopic rod used for driving; and further comprises a latch mechanism and a magnetorheological mechanism, wherein the magnetorheological mechanism comprises a magnetorheological liquid bag installed close to an inner side wall and an excitation coil used for providing a strong magnetic field. The magnetorheological flexible and close locking and the latch mechanical clamping locking structure are integrated, and the two structures are in cooperation, so that the joint pipe is effectively prevented from slipping, moving and accidentally falling during the pulling process, the locking reliability is greatly improved, and the operation requirement of the pipe pulling machine for large load pulling is met.
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