[**Hebei Provincial State-owned Assets Supervision and Administration Commission State-owned Enterprise Reform].
Since the second half of the year, Jizhong Energy Fengfeng Group Handan Concentrator Plant has taken the "five small" innovation and rationalization suggestions as the starting point, setting off an innovation boom in the whole plant, and the "Li Xiaodong Innovation Studio" has installed a belt excess alarm on the No. 125 raw coal transportation belt, which has realized the automatic detection and automatic alarm of the belt operation status, and greatly improved the level of safe operation of the equipment.
The No. 125 belt of the plant is the raw coal transportation belt, the upstream equipment is 14 raw coal feeders, which are responsible for receiving and feeding coal, and the downstream equipment is No. 161 and No. 162 scraper conveyors, which are responsible for the operation of raw coal entering the warehouse. In the production process, when the amount of coal is too large, the No. 161 and No. 162 scraper conveyors will trip and protect due to overload operation, and even cause chain breakage in serious cases, which will have a greater impact on normal production.
In this regard, they added a new external signal to the No. 125 belt scale, which led the 4-20 mA signal to the smart meter head, and set the 4-20 mA output at the belt scale end as the instantaneous flow rate of the belt scale, and then converted the signal into flow data for real-time monitoring. When the smart meter receives the 4-20 mA monitoring signal, if the instantaneous flow of the belt exceeds 800 tons per hour, the external sound and light alarm will send out an audible and visual alarm, prompting the operator to feed too much coal, and should reduce the amount in time to prevent the downstream equipment from overloading. After the installation of alarms, the broken chain of No. 161 and No. 162 has been effectively improved, eliminating the impact of overload operation on the service life of the equipment, and greatly improving the stability of belt transportation, realizing continuous and stable production and improving production efficiency. (Zhang Zixuan).
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