The technology transformation of safe door closing in the auxiliary shaft of Daming No.2 Coal Mine;

Along with the development of the digging,promote the way and can't meet the demands originally possessed,so safe door of the adoption folio type,and adjust the safe door opens the angle,and added to establish a cage to an automatic parking system in give or get an electric shock control system,after reform,the demand that satisfied the production,also strengthenned the safety.

According to the structural features and the scene actual requirements of all kinds of mine safety door,have designed the vertical shaft swing type safety door.

Through improving safety door,wobble platform,bar t o achieve pneumatic control Epatiate on the theory of electric closedown among s i gnal,cage position and safety door,wobble platform,bar,to up to vertical shaft c age hoisting pa

The platform screen doors (PSD) and safety doors used in the subway of northern cities are also analyzed in this paper.

The technological transformation of shaft safety gate;

Design of the Speech Control System of Building Safe Gate;

The application of programme controller for monitoring safety valve;

In this paper several mechanical failures influencing the normal service of safety valve are analyzed.

The principle of DG220/10-4 boiler Safety Valve is analysed and the qnestions appearing in the work of safety valve are pointed out and the countermeasures are advanced.