103results about How to "Reduce production safety hazards" patented technology

The invention provides a rocker-type transverse shearer. The shearer comprises a machine body consisting of a plurality of case separation cavities, and a power transmission chain, a rocker, a roller and a coiling block which are respectively arranged inside the case separation cavities, wherein a sliding board is arranged at the lower part of the machine body; and the power transmission chain comprises a main transmission wheel connected with a motor spindle and a pair of secondary transmission wheels which are engaged with one another for driving front and back vertical transmission shafts to output power so as to drive a last-stage transmission gear shaft, a roller on a gear shaft of a speed-reducing transmission box, a chain wheel transmission device and cutting teeth to run synchronously. Therefore, a technical scheme of transverse full-section no-dead-angle all-dimensional coal mining is realized. The rocker-type transverse shearer can overcome the defects that the conventional coal mining device can be only used for exploiting coal layers on the top face and the lateral face of a small-dip roadway structure while coal layers between two rollers cannot be synchronously exploited, solves the difficult problem that coal layers on the bottom face of the structure with a roadway dig being more than 25 degrees and coal layers between the two rollers are abandoned without exploitation, is applicable to exploitation of the coal layer on the bottom face of the roadway dig structure of a coal mine, and is particularly applicable to the full-section no-dead-angle all-dimensional exploitation of the coal layer on the bottom face of the structure with the roadway dig being more than 25 degrees and thin coal layers of mediate and small-sized coal mines.

The invention relates to the nano-powder preparation field, in particular to a method for preparing nearly spherical nanometer oxide powder having good monodispersity and uniform particle size distribution with ultrasonic atomization. The method is characterized in that: the synthesis of water polyurethane is divided into three stages; a first stage is stepwise polymerization, i.e. polyurethane prepolymer is formed from oligomer polylol, hydrophilic monomers, modified monomers and isocyanate through stepwise polymerization; a second stage is the dispersion of the prepolymer in water after neutralization and salt formation; a third stage is the formation of water polyurethane emulsion after hydrophilic chain extender is added. The invention adopts a route of polymerizing modified monomers and polyurethane monomers jointly with different reaction mechanisms to ensure that modified monomers and polyurethane monomers are interpenetrated or grafted, thus obtained products have multiple material characteristics, i.e. the characteristics of acrylic acid, epoxy, hydroxyl silane and other materials are led into the products at the same time when the advantages of polyurethane material are maintained, so as to ensure that target products have stronger adaptability and better performance.

The invention relates to a stamping control system and a stamping method. A manipulator and a stamping machine are controlled by virtue of one control system, and according to the control system, when the manipulator is located between an upper die surface and a lower die surface, an actual distance between the upper end surface of the tail end of the manipulator and the upper die surface is controlled to be greater than or equal to a safe distance, and the safe distance is 1 / 3 to 1 / 5 of a distance between the upper die surface and the lower die surface. The manipulator and the stamping machine stop running simultaneously as long as any of the manipulator and the stamping machine is failed, thus a risk in the traditional stamping control system is avoided that when any of the manipulator and the stamping machine is failed, the other one still runs, and at least the safe distance between the manipulator and the stamping machine can be ensured when the tail end of the manipulator is located between the upper die surface and the lower die surface; therefore, the safety of the manipulator and the stamping machine is further improved, and the occurrence probability of potential safety hazards of stamping control system production is reduced.