Gap adjusting device for feeding eccentric pipe of ball mill

Abstract

The utility model relates to a gap adjusting device for a feeding eccentric pipe of a ball mill, which comprises a feeding end cover, a feeding hole arranged at the center of the feeding end cover and the feeding eccentric pipe arranged in the feeding hole, and a bolt hole A is arranged on the feeding end cover of the ball mill. The eccentric pipe gap adjusting support is an arc-shaped steel plate support, the inner circle radius R of the arc-shaped steel plate support is equal to the outer circle radius of the feeding eccentric pipe, the outer circle radius of the arc-shaped steel plate support is smaller than the radius of the ball mill feeding cover, and the arc-shaped steel plate support is provided with bolt holes B which are equal to the bolt holes A in the ball mill feeding end cover in diameter and equal to the bolt holes A in distance. A groove is formed in the middle of the arc-shaped support, and the arc-shaped steel plate support is installed under a feeding end cover of the ball mill through bolts. The device has the advantages that gaps of the eccentric pipe mounted by the device are uniform, the rubber sealing ring is less abraded, the sealing ring is tightly contacted with the eccentric pipe, and ore pulp is not easy to leak.

Description

Technical Field

[0001] The utility model belongs to the field of ore dressing equipment, and particularly relates to a gap adjusting device for a feed eccentric pipe of a ball mill in a concentrator plant. Background Art

[0002] A ball mill is a key device for further pulverizing materials after they are crushed. It is widely used for grinding various ores and other materials and is widely used in industries such as ore dressing, building materials, and chemical engineering. The ball mill mainly consists of a horizontal cylinder body, a ball mill vacuum shaft, a bushing with a spiral line in the inner hole connected to the ball mill vacuum shaft, a feed end cover fixedly connected to the feed end of the ball mill vacuum shaft by bolts, a feed hole provided at the center of this feed end cover, and a feed eccentric pipe provided in this feed hole. When installing or replacing the feed eccentric pipe of the ball mill, manual installation and replacement are carried out based on manual experience. Since there is no special tool, it is impossible to accurately find the concentricity between the feed eccentric pipe and the ball mill feed cover, resulting in uneven gaps between the eccentric pipe and the ball mill feed cover. This will cause wear on the rubber sealing ring on the feed cover. At the same time, a deep groove is ground on the transverse position where the outer wall of the eccentric pipe contacts the sealing ring, causing pulp to leak from the gap between the eccentric pipe and the sealing ring, failing to play a sealing role, shortening the service life of the eccentric pipe, affecting production, increasing the consumption of spare parts, and also bringing certain difficulties to the maintenance work. Summary of the Utility Model

[0003] The invention object of the utility model is to provide a gap adjusting device for a feed eccentric pipe of a ball mill, which device prolongs the service life of the rubber sealing ring on the ball mill feed cover, reduces the consumption of spare parts, lowers the production cost, and reduces the maintenance workload.

[0004] The utility model is realized as follows. A gap adjusting device for a feed eccentric pipe of a ball mill of the utility model includes a feed end cover fixedly connected to the feed end of the ball mill vacuum shaft, a feed hole provided at the center of this feed end cover, and a feed eccentric pipe provided in this feed hole. There is a bolt hole A on the ball mill feed end cover. It is characterized in that an eccentric pipe gap adjusting bracket is installed directly below the ball mill feed end cover. The eccentric pipe gap adjusting bracket is an arc-shaped steel plate bracket. The inner circle radius R of the arc-shaped steel plate bracket is equal to the outer circle radius of the feed eccentric pipe, and the outer circle radius of the arc-shaped steel plate bracket is smaller than the radius of the ball mill feed cover. Bolt holes B with the same diameter and equal distance as the bolt hole A on the ball mill feed end cover are opened on the arc-shaped steel plate bracket. A groove is opened at the middle position of the arc-shaped bracket. The arc-shaped steel plate bracket is installed directly below the ball mill feed end cover through bolts.

[0005] Preferably, the thickness of the arc-shaped steel plate bracket is 10 mm, and the length of the arc-shaped steel plate bracket is ≥ 1 / 4 of the circumferential length of the ball mill feed cover.

[0006] The advantages of the utility model are:

[0007] With the eccentric pipe installed by this device, the clearance is uniform, the rubber sealing ring wears less, the sealing ring is in close contact with the eccentric pipe, and the pulp is not likely to leak.

[0008] Time is saved when installing or replacing the eccentric pipe, and the work efficiency is high.

[0009] The consumption of spare parts is reduced, and the production cost is lowered. Description of the Drawings

[0010] Figure 1 It is a structural schematic diagram of the present utility model.

[0011] Figure 2 It is a schematic diagram of the eccentric pipe clearance adjustment device of the present utility model installed on the feed end cover of the ball mill.

[0012] Figure 3 is Figure 2 side view of. Detailed Embodiment

[0013] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that the advantages and performance of the present utility model are more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. In addition, it should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0014] As Figures 1 - 3 shown, an eccentric pipe clearance adjustment device for a ball mill of the present utility model includes a feed end cover 1 fixedly connected to the feed end of the vacuum shaft of the ball mill, a feed hole provided at the center of the feed end cover, and a feed eccentric pipe 4 provided in the feed hole. A bolt hole A2 is provided on the ball mill feed end cover. It is characterized in that an eccentric pipe clearance adjustment bracket is installed directly below the ball mill feed end cover. The eccentric pipe clearance adjustment bracket is an arc-shaped steel plate bracket 5. The inner circle radius R51 of the arc-shaped steel plate bracket 5 is equal to the outer circle radius of the feed eccentric pipe, and the outer circle radius 52 of the arc-shaped steel plate bracket is smaller than the radius of the ball mill feed cover. A bolt hole B53 equal in diameter and distance to the bolt hole A2 on the ball mill feed end cover is provided on the arc-shaped steel plate bracket 5. A groove 54 is provided at the middle position of the arc-shaped bracket. The arc-shaped steel plate bracket 5 is installed directly below the ball mill feed end cover through bolts.

[0015] The thickness of the arc-shaped steel plate bracket 5 of the present utility model is 10 mm, and the length of the arc-shaped steel plate bracket 5 is ≥ 1 / 4 of the circumferential length of the ball mill feed cover. Figure 2 In 3, it is the clearance between the eccentric pipe and the feed pipe.

[0016] When replacing or installing the feeding eccentric tube 4, first pass the inlet end of the feeding eccentric tube 4 through the ball mill feeding cover from inside the ball mill. Refer to Figure 2 and Figure 3 , and then put the rubber sealing ring and the sealing ring circular pressing plate on the eccentric tube;

[0017] Secondly, after lifting the eccentric tube to an appropriate height with a crane, install the eccentric tube clearance adjustment bracket 5 directly below the feeding end cover 1 of the ball mill, so that the inner circle of the adjustment bracket is concentric with the circular hole of the ball mill feeding end cover. At this time, the distance from the inner circle of the eccentric tube clearance adjustment bracket 5 to the center point of the circular hole of the ball mill feeding end cover is R, which is exactly equal to the outer circle radius of the eccentric tube;

[0018] Thirdly, before placing the eccentric tube 4 on the clearance adjustment bracket, first insert the inlet end of the eccentric tube into the circular hole of the ore feeding hopper, and then place the eccentric tube on the clearance adjustment bracket. Check and measure whether the clearance 3 between the eccentric tube and the ball mill feeding end cover is equal. After confirmation, spot-weld four points diagonally on the circumference at the contact between the inlet end of the eccentric tube and the ore feeding hopper to prevent the generation of tension when welding at one place, resulting in a change in the clearance between the eccentric tube and the circular hole of the ball mill feeding end cover;

[0019] Finally, after the welding between the eccentric tube and the ore feeding hopper is completed, remove the clearance adjustment bracket from the ball mill feeding end cover, and then install the rubber sealing ring and the circular pressing plate on the ball mill feeding end cover. The entire installation work of the eccentric tube is completed.

Claims

1. A gap adjustment device for the feeding eccentric pipe of a ball mill, comprising a feeding end cover fixedly connected to the feeding end of the vacuum shaft of the ball mill, a feeding hole provided at the center of the feeding end cover, and a feeding eccentric pipe provided in the feeding hole. There are bolt holes A on the ball mill feeding end cover, and it is characterized in that An eccentric pipe clearance adjustment bracket is installed directly below the feed end cover of the ball mill. The eccentric pipe clearance adjustment bracket is an arc-shaped steel plate bracket. The inner circle radius R of the arc-shaped steel plate bracket is equal to the outer circle radius of the feed eccentric pipe. The outer circle radius of the arc-shaped steel plate bracket is smaller than the radius of the ball mill feed cover. Bolt holes B with the same diameter and equal distance as the bolt holes A on the ball mill feed end cover are opened on the arc-shaped steel plate bracket. A groove is opened at the middle position of the arc-shaped bracket. The arc-shaped steel plate bracket is installed directly below the ball mill feed end cover through bolts.

2. The ball mill feed eccentric tube clearance adjustment device according to claim 1, characterized in that, The thickness of the arc-shaped steel plate bracket is 10 mm, and the length of the arc-shaped steel plate bracket 5 is ≥ 1 / 4 of the circumferential length of the ball mill feed cover.

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