4results about How to "Avoid damage accidents" patented technology

The utility model discloses an automatic centering device for a dummy bar, which is characterized by comprising a base, a support is arranged on the base, an inverted L-shaped thrust arm is hinged on the support, and a thrust plate is arranged at the front end of the thrust arm; the two ends of the hydraulic cylinder are hinged to the base and the thrust arm respectively; the device further comprises a fixing plate connected with the support, and two sets of proximity switches matched with the thrust arms are arranged on the fixing plate. The dummy bar centering device is simple in structure, automatic centering of the dummy bar is achieved through the hydraulic cylinder and the proximity switch, equipment damage accidents caused by inaccurate positioning of a traditional dummy bar centering device are avoided, unnecessary manual maintenance workload is reduced, work efficiency is improved, and stable and continuous production of a continuous casting machine is achieved.

The present invention discloses a method for inverting and distinguishing the stability of the roof of the retreat channel of a fully mechanized mining face, comprising the following steps: on-site monitoring of the retreat channel roof subsidence and coal pillar stress, and analysis of the geological structure and mine pressure observation data of the working face; establishing a surrounding rock stress model of the retreat channel under three different basic roof failure forms, and deriving the corresponding theoretical calculation formula for the retreat channel roof subsidence; substituting the on-site roof subsidence monitoring data into the theoretical calculation formula, inverting the basic roof break position, and combining the coal pillar stress monitoring data to realize the quantitative evaluation of whether the retreat channel roof is stable. The present invention takes into account the influence of different basic roof break positions on the retreat channel roof subsidence, and can use the monitoring data to invert and distinguish the roof failure form and stability of the retreat channel, provide guidance for the safe retreat of coal mining equipment in the fully mechanized mining face, and avoid accidents such as casualties and equipment damage caused by the instability of the retreat channel roof.

This invention provides an intelligent electronic anti-misoperation lock for 10kV load switchgear. Addressing the problems of traditional 10kV switchgear copper locks, such as cumbersome operation, lack of insulation protection, and susceptibility to misoperation, this new design employs an integrated transmission locking mechanism that can simultaneously lock two lock holes on one side. Rotating the lock hole and latch via a key-operated handle, and then coordinating with the transmission frame and shaft, locks and unlocks the switchgear baffle locking mechanism via a limit pin. The intelligent circuit board integrates a voltage detector and a collision alarm device, combined with conductive metal primary and secondary locking rods, enabling real-time monitoring of leakage and collision conditions, and emitting audible and visual alarms via buzzers and indicator lights. An insulated handle and a high-strength plastic lock body ensure operator safety. This anti-misoperation lock is simple and efficient to operate, offers excellent safety performance, effectively prevents misoperation, provides real-time feedback on equipment status, and improves the safety and reliability of power equipment operation.

The utility model relates to an unmanned aerial vehicle with a buffer structure, which comprises a vehicle bottom, a speed reducing module, a first connecting seat, rotating modules, a wind gathering module, an air bag module and a vehicle body, the first connecting seat is fixedly mounted at the bottom end of the vehicle bottom, the rotating modules are respectively arranged at two ends of the vehicle body, and the wind gathering module is arranged at the bottom ends of the rotating modules. The air bag module is arranged at the lower end of the rotating module, the air bag module is arranged at the upper end of the air gathering module, the buffering module comprises a folding spring, a sliding module, a folding module, an air cylinder and a force reducing module, the folding spring is arranged at the bottom end of the machine bottom, the sliding module is arranged on the outer side of the folding spring, and the folding module is arranged at the side end of the sliding module; according to the unmanned aerial vehicle, the impact force brought when the unmanned aerial vehicle descends to the ground can be effectively relieved, and the accident that the unmanned aerial vehicle is damaged due to the fact that the unmanned aerial vehicle descends too fast due to misoperation of a flying hand, and the impact force borne by the unmanned aerial vehicle is too large is avoided.