小青矿选煤厂209号刮板机排料闸门的改造

Transformation of discharging gate of NO.209 scraper conveyor in Xiaoqingkuang coal preparation plant

阐述了小青矿选煤厂209号刮板机排料闸门的生产工艺,并提出了其具有操作不便,工作效率低,生产中需要多次调节,劳动强度大等问题。针对存在的问题,对209号刮板机排料闸门进行了改造,在209号刮板机2块原排料闸门的背面焊接2根齿条,将2对齿轮与2根φ40 mm的轴组成2组传动轴,由电机带动减速器,实现排料闸门机械化。同时对排料闸门进行设备选型和传动轴抗弯曲强度、抗剪切强度的校核,以论证其科学性。最后对排料闸门改造效果进行分析,结果表明:209号刮板机排料闸门改造后,具有离合器操作简单、通俗易懂,科学合理、安全可靠,节省操作时间、降低劳动强度等优点;209号刮板机电动排料闸门投入使用后,提高了工作效率,保证了生产顺畅,不再需要停止给煤,直接可在生产过程中实现机械自动推入、拨出排料闸门;每天可增加生产时间16 min,可多生产洗产品48 t,每年增效625.41万元。

The process analysis of NO. 209 scraper conveyor discharging gates indicates that it＇s unhandy, low efficient, labor-intensive, high regulation frequency and the like. To resolve these problems, weld two racks to the back of discharging gates. The two-group transmission shaft consists of two couples counter gears and two shafts whose diameter is 40 mm. The reducer is driven by electrical machine. Select proper discharging gates, check the flexural strength and shear strength of transmission shaft to verify its rationality. After transformation, the clutch becomes easier, more reliable, it also helps to save operating time 16 minutes every day and reduce labor intensity. The application of electrical discharging devices could be directly push in or out day, increase 6. 2541 million yuan every gates improves working efficiency. No need to stop feeding coal, the relevant discharging gates. The plant could produce 48 tons more clean coal every year.