Medium-speed coal mill pebble coal discharge port clearer

Abstract

The invention discloses a pebble coal discharging hole unblocking device for a medium speed coal mill. The pebble coal discharging hole unblocking device is provided with an operating rod and a connecting device, wherein an eccentric cover is arranged on a pipe orifice in the lower end of the operating rod; the upper end of the operating rod is connected with a movable hook assembly; the movable hook assembly is provided with an eccentric short pipe connected to the upper end of the operating rod; a movable hook is hinged to the side edge of the upper end face of the eccentric short pipe; a transmission rod is arranged in the operating rod; the upper end of the transmission rod is connected to the middle of the movable hook; the lower end of the transmission rod extends out of the eccentric cover, and is connected with a rocker handle; the connecting rod is provided with a connecting port and an operating rod bell and spigot; the axis of the operating rod bell and spigot and the axis of the connecting port are positioned on the same straight line; the operating rod passes through the operating rod bell and spigot and the connecting port; a sealing ring matched with the operating rod is arranged in the operating rod bell and spigot. According to the pebble coal discharging hole unblocking device, the operating rod of which the upper end is provided with the movable hook is inserted into a blocked position on the pebble coal discharging hole of the medium speed coal mill through the connecting device, so that blockage of the pebble coal discharging hole caused by slender strip-shaped sundries such as iron wires and gun lines on the pebble coal discharging hole can be cleared safely, rapidly, conveniently and effectively during running of the medium speed coal mill.

Description

technical field [0001] The invention relates to an auxiliary working device of a medium-speed coal mill, in particular to a blocking remover for a pebble coal discharge port of the medium-speed coal mill. Background technique [0002] Medium-speed coal mills are used to grind raw coal into pulverized coal to provide fuel for thermal power plant boilers. In the process of grinding raw coal into coal powder with a medium-speed coal mill, there are always some granular materials that are difficult to grind in the raw coal, and these granular materials are called pebble coal. During the coal grinding process of the medium-speed coal mill, the pebble coal can be separated out. There is a pebble coal discharge port at the lower end of the medium-speed coal mill. During the normal operation of the coal machine, it is necessary to discharge the pebble coal from the pebble coal discharge port in time, otherwise it will affect the normal operation of the medium-speed coal mill. The p...

AI Technical Summary

Problems solved by technology

In order to remove the above-mentioned sundries blocked in the pebble coal discharge port, in the prior art, there is no special device for clearing the pebble coal discharge port of the medium-speed coal mill. After the pebble coal discharge port is found to be blocked, first stop the medium-speed coal grinding The operation of the coal mill, and then let the temperature in the medium-speed coal mill drop slowly, and then open the manhole of the medium-speed coal mill, and the clearing personnel wear protective clothing to enter the medium-speed coal mill through the manhole, and move to the gravel After the coal is discharged from the outlet, manually remove the above-mentioned sundries blocking the pebble coal discharge outlet, and then restart the medium-speed coal mill to run

This method of clearing the pebble coal discharge port requires shutdown, cooling, and manual removal, which takes up a lot of time and the working environment is harsh. When restarting the medium-speed coal mill, it is necessary to blow out the coal powder in the pulverized discharge system first, otherwise it will increase The probability of deflagration in the powder discharge system has certain potential safety hazards

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