4results about How to "Reduce hidden risks" patented technology

The invention discloses a titanium metallocene compound with limited geometric configuration and a preparation method and application thereof, the titanium metallocene compound with limited geometric configuration is a compound with a general formula (I): wherein R1, R2, R3 and R4 are the same or different and are respectively and independently selected from alkyl; r is selected from one of fluoro, methoxyl, methyl, tert-butyl and-H; and n is 1 or 0. The titanium metallocene compound with the limited geometric configuration has better catalytic activity, and prepared polypropylene is high in melt index and good in fluidity. The titanium metallocene compound with the limited geometric configuration is synthesized from different amido groups, the optimization of the whole synthesis route is completed, the problem of monosubstitution in silicon bridging reaction is solved, and the whole process has high yield. The raw materials are easy to obtain and low in cost, and technological production is easy to realize.

The utility model discloses an improved pearl wool slitting device which comprises a machine frame, an unwinding mechanism, a slitting mechanism and a winding mechanism, the unwinding mechanism, the slitting mechanism and the winding mechanism are sequentially arranged on the machine frame at intervals, the slitting mechanism comprises a cutter connecting shaft, a plurality of slitting cutter assemblies and a gear rack type oscillating cylinder, and the slitting cutter assemblies are detachably arranged on the cutter connecting shaft at intervals. Each slitting knife assembly is composed of a cutting knife and a cutting knife connecting seat, one end of each cutting knife connecting seat is rotatably and adjustably installed on the cutting knife connecting shaft, and the other end of each cutting knife connecting seat is fixedly provided with the cutting knife; one end of the cutter connecting shaft is fixed on the rack through a mounted bearing, and the other end of the cutter connecting shaft is connected with a rotating assembly of the gear rack type oscillating cylinder. The cutter does not rotate during working, so that the potential risk of slitting is reduced. Not only can the mounting distance of the cutter be adjusted, but also the fixed angle of the cutter connecting seat on the cutter connecting seat can be adjusted. And the cutter connecting seat is driven to rotate by the gear rack type oscillating cylinder, so that the shutdown processing efficiency of the equipment can be improved, and the replacement of the pearl wool is convenient.

This disclosure provides a ventilation system, control method, device, and related equipment for hydrogen-powered locomotives, relating to the field of hydrogen-powered locomotive technology. The ventilation system includes: a ventilation device for ventilating the hydrogen storage compartment of the hydrogen-powered locomotive; a time-delay switch circuit connected between a first power supply circuit of the hydrogen-powered locomotive and a second power supply circuit of the ventilation device, used to switch from an open state to a closed state when the first power supply circuit is on, and then switch back to an open state after a preset duration, wherein the second power supply circuit is on when the time-delay switch circuit is on; and a control device connected to the second power supply circuit, used to control the second power supply circuit to be on or off after the time-delay switch circuit switches from a closed state to an open state. This disclosure, through the proposed ventilation system, reduces the risks and hazards caused by hydrogen leakage in hydrogen-powered locomotives, providing a reliable guarantee for the safe operation of hydrogen-powered locomotives.

The present application relates to the field of engineering construction management and information technology, in particular to an integrated multi-system engineering supervision full life cycle digital management and control platform, which collects supervision behavior, files, images and environmental equipment data and transmits; uniformly identifies, space-time aligns, semantically normalizes and correlation models the data to generate a project database; constructs a request influence domain and calculates a dynamic risk value when aggregating and displaying or penetrating and linking; generates a permission intersection strategy according to the risk value and implements dynamic regulation; finally graphically displays the processed data in the cockpit management center, realizes real-time monitoring, command and supervision of quality, progress, cost and safety, the present application generates a permission intersection based on a request influence domain and a dynamic risk value and links to regulate, avoids permission penetration and cache leakage caused by cockpit aggregation; adaptively shrinks the data range, display granularity and operation entrance according to the risk, balances efficiency and safety; archives and audits the permission trimming, regulation action and disposal track.