54results about How to "Reduce downtime losses" patented technology

The invention provides an online replacement method for a coke oven valve. The online overhauling replacement method for the coke oven valve is suitable for horizontally-mounted valve bodies. During gas cutting and heating, the pressure in a gas collection pipe is adjusted into the positive pressure, a fire source is prevented from entering the gas collection pipe, and explosion is avoided; duringdisassembly and assembly of the valve body, the pressure in the gas collection pipe is adjusted into the negative pressure, and the situation that when the valve body is disassembled, a great amountof gas is spilled out suddenly and consequently safety accidents happen is prevented; and meanwhile the bolt which cannot be disassembled normally is treated by the adoption of heating and quenching,and the bolt can be disassembled quickly. The online replacement method has the beneficial effects that operations are easy and convenient to implement, the overhauling time is short, the cost is low,the required work space is small, the labor force is saved, the labor intensity is lowered, safety and reliability are achieved, and the method is easy to realize; and a coke oven can operate stablyfor a long time, the replacement cost and time of the device are saved, the production continuity is guaranteed, the halt production loss is lowered, the actual production demands of factories can bemet, and the online replacement method is suitable for application and popularization in the production practice.

A high-strength antiwear precise hollow shaft without breaking is made up of low-alloy cast steel containing C, Si, Mn, Cr, Ni, Mo, V and Fe through smelting, casting, annealing, coarse turning, modifying, fine turning, grinding, drilling and reaming. Its advantages include high strength, toughness and hardness, no defects and stress, high accuracy, long service life and low cost.

The invention discloses a rotary kiln building structure, relates to the technical field of rotary kiln manufacturing and maintaining, and provides a rotary kiln building structure not prone to being damaged. The rotary kiln building structure comprises a rotary kiln barrel body, a building structure and blocking brick rings. The building structure comprises fire-resisting insulating bricks, bottoming bricks and fixed steel bars. The fire-resisting insulating brick are built in the length direction of the rotary kiln barrel body to form multiple fire-resisting insulating brick lines in a circumferential array, and connecting steel bars welded to the rotary kiln barrel body are arranged at the bottoms of the fire-resisting insulating bricks. The bottoming bricks are arranged between the adjacent fire-resisting insulating brick lines. Each fixed steel bar is in a V shape. The fixed steel bars are located in space between the adjacent bottoming bricks, and the pointed ends of the fixed steel bars and the rotary kiln barrel body are welded, and the bottoming bricks are pressed down. The remaining space between the adjacent fire-resisting insulating brick lines is filled with refractory castables. The blocking brick rings are arranged in the length direction of the rotary kiln barrel body at intervals and are connected with the rotary kiln barrel body, and the building structure is divided by the blocking brick rings into multiple sections. The rotary kiln building structure can be applied to manufacturing or maintaining of a rotary kiln.