Bolt sealing structure of rod mill cylinder and rod mill

Abstract

The invention relates to a rod mill, and discloses a bolt sealing structure of a rod mill cylinder, the bolt sealing structure comprises the rod mill cylinder, a buffer pad and a lining plate which are sequentially arranged from outside to inside, screw mounting through holes are formed in the cylinder, the buffer pad and the lining plate, screws are arranged in the screw mounting through holes, and a plurality of fastening nuts are connected to one end, close to the rod mill cylinder, of each screw. An axial sealing pair is arranged on the screw, the axial sealing pair comprises a plurality of sealing rings, supporting rings and sealing pressing rings, the supporting rings and the sealing pressing rings are arranged on both sides of the sealing rings, and the sealing rings are arranged in the mounting through holes so that the fastening nuts can be in sealed connection with the rod mill cylinder. In addition, the invention further discloses a rod mill. The bolt sealing structure of the rod mill cylinder is simple in structure, good in sealing effect and high in economic benefit.

Description

technical field [0001] The invention relates to a rod mill, in particular to a bolt sealing structure for a cylinder body of a rod mill. Furthermore, the invention also relates to a rod mill. Background technique [0002] In the field of coal chemical industry or other coal deep processing, it is often first necessary to process the raw coal into coal-water slurry through a rod mill, so the rod mill is widely used in the coal chemical industry. [0003] The rod mill in the prior art is mainly composed of a chute feeding device, a rotary part, a discharging device, a driving device, a lubrication system, an electric control system and the like. Among them, the rotary part is the core part of the main body of the rod mill, which is composed of the cylinder of the rod mill, the end cover of the material inlet and outlet, the liner and other parts. The liner is connected to the cylinder of the rod mill by bolts, and the cylinder of the rod mill The drum-shaped rubber gasket is...

AI Technical Summary

Problems solved by technology

Taking a rod mill with a specification of Ф4000×6000 as an example, when the equipment is running, more than 100 tons of steel rods in the barrel of the rod mill roll down from top to bottom, hitting the liner in the barrel of the rod mill, and the barrel of the rod mill vibrates violently , has a severe impact on the sealing structure, so that problems such as liner sliding, bolt deflection, and bolt hole deformation will easily occur 1 to 2 months after the replacement of the sealing ring, which will eventually lead to loosening of the fastening nut, sealing ring and rod grinding The pre-tightening force between the barrels drops or even breaks away, the sealing function fails, and the coal-water slurry in the barrel leaks from the bolt holes of the barrel to the outside

[0004] Slurry leakage in the cylinder of the rod mill not only wastes a lot of raw coal, but also seriously affects the stable operation of the equipment and reduces the service life of the equipment. At the same time, after the coal-water slurry dries up, the coal powder in the plant will float, and there is a risk of flash explosion.

After the leaked coal-water slurry is air-dried, it needs to be cleaned manually, which increases the labor cost

After the cylinder of the rod mill leaks, it needs to be stopped for a short time to eliminate the leakage. There are more than 720 bolt sealing points on the cylinder of each rod mill. The maintenance workload is large, and the replacement consumes a lot of spare parts and the cost is high.

According to the operation specification, the main motor of the rod mill needs to be powered off every time the leak is eliminated, and then the power is turned on after the leak is eliminated. The voltage of the main motor of the rod mill is 6kV. Security risks

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