Mine mill feed pipe outer sealing device

Abstract

The invention provides an external sealing device for a feed pipe of a mining mill. The end part of the mill is provided with a hollow shaft of a feeding bush; one end of the feed pipe is inserted into the feeding bush; the sealing device is fixedly mounted on the flange of the feeding bush and rotates with rotation of the hollow shaft; the sealing device is a sealing ring formed by composite sealing of an inner sealing ring, an outer sealing ring and an impeller snap ring located between the inner sealing ring and the outer sealing ring, and the sealing ring sleeves the outer peripheral surface of the feed pipe; the upper part of the feed pipe is provided with a feed-back hole at a position corresponding to the impeller snap ring; the circumferential surface of the inner wall of the impeller snap ring is provided with inner teeth used for rotarily scraping ore pulp escaping out from the inner sealing ring back to the feed-back hole. The inner sealing ring exerts an intercepting effect on leaked ore pulp; although ore pulp leaking from the interior of the mill escapes out from the inner sealing ring, the ore pulp can be rotarily scraped back to the feed-back hole of the feed pipe by the rotating impeller snap ring; and with the rotary sealing structure with combined interception and dredging functions, sealing of the feeding end of the mining mill can be realized, and ore pulp can be prevented from overflowing to the exterior of the mill.

Description

technical field [0001] The invention relates to the technical field of sealing the feeding end of a mill, in particular to an external sealing device for a feeding pipe of a mining mill. Background technique [0002] The mill is the most critical equipment in the grinding operation of the mineral processing plant. During the production of the mill, the problem of slurry leakage at the feed end of the mill cylinder is often encountered. This is because the feeding pipe and the hopper of the mill do not rotate with the When the cylinder rotates, there is relative sliding between the rotating feeding bush and the stationary feeding pipe. When the pulp inside the mill is higher than the outer diameter of the feeding pipe, the pulp will overflow from the feeding pipe. Obviously, a rotary sealing structure is required between the rotating part and the non-rotating part. When the mining mill works normally, it rotates continuously horizontally and rapidly 24 hours a day, while the...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of ore slurry leakage caused by poor sealing of the feed end of the mill in the prior art, the present invention provides an external sealing device for the feeding pipe of the mine mill

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