CN211359161U - Double-helix main shaft wear-resistant protection structure of mining vertical mill - Google Patents

Abstract

The double-helix main shaft wear-resistant protection structure of the mining vertical mill comprises two side protection sleeves of a wear main shaft of the vertical mill, a bottom tray, a wear-resistant medium, a strong magnetic block, glue, a fixing bolt, a helical blade and the main shaft of the vertical mill; the bottom tray is fixedly connected with the vertical mill main shaft; the helical blade is fixedly connected with a main shaft of the vertical mill; the strong magnetic block is fixedly connected with the abrasion part of the vertical mill main shaft through glue; the worn part at the spiral connection part of the spiral blade and the main shaft of the vertical mill is fixedly connected with a wear-resistant medium through glue; the two side protective sleeves are fixedly connected with the bottom tray; gaps between the two side protective sleeves and the abrasion part of the vertical mill main shaft are filled and connected through abrasion-resistant media; the upper wear parts of the two side protective sleeves are fixedly connected with the strong magnetic blocks through glue. The advantages are that: the main shaft of the vertical mill is effectively protected by the double wear-resistant protection structure, the main shaft is long in service life, the hidden danger of equipment is few, the manpower and material resources are low in consumption, the overhaul time is short, and the overhaul efficiency is high.

Description

Double-helix main shaft wear-resistant protection structure of mining vertical mill

The technical field is as follows:

the utility model relates to a vertical mill auxiliary assembly technical field of ore dressing especially relates to a wear-resisting protection architecture of two spiral main shafts of mining vertical mill.

Background art:

in the prior art, a vertical mill, also called a tower mill, is a high-efficiency and energy-saving fine grinding device, has the characteristics of high efficiency, energy conservation, environmental protection, simple operation, easy maintenance and the like, plays a key role in the fine grinding and regrinding processes of a dressing plant, and directly influences the grade of final iron ore concentrate. Along with the wearing and tearing of helical blade, the medium motion kinetic energy that is close to vertical mill main shaft position increases, because the wearing and tearing of material, erodees and corrodes and produce wearing and tearing to main shaft the latter half, and vertical mill main shaft is double helix structure, and both sides all produce the wearing and tearing of different degree of depth, continue to use and will have the risk of disconnected axle shut down. The vertical mill is imported equipment, the main shaft is made of complex materials, the main shaft is subjected to plastic deformation due to heating by direct welding, the concentricity of the main shaft and the coupler is damaged, and the main shaft jumps when rotating to cause equipment damage; the coating of the common wear-resistant coating only can reduce the wear speed, can not effectively prevent wear and has short service cycle; the hidden danger of use can be eliminated through the main shaft of changing wearing and tearing, and the working property of recovery equipment, nevertheless just so need purchase the main shaft again, the purchase cycle is long, and equipment dismouting volume is big, need consume a large amount of manpower and materials, and the maintenance period is long, influences the mine production.

The utility model has the following contents:

the utility model discloses the purpose is overcome the not enough of above-mentioned prior art existence, provides one kind and can effectual protection main shaft, improves main shaft life, eliminates the equipment hidden danger, guarantees normal production, shortens the maintenance activity time simultaneously, improves maintenance efficiency, reduces maintenance work load, reduces the mining vertical mill double helix main shaft wear-resisting protection architecture of cost of overhaul.

The utility model discloses a solve the technical scheme that its problem adopted and be: the double-helix main shaft wear-resistant protection structure of the mining vertical mill comprises two side protection sleeves of a wear main shaft of the vertical mill, a bottom tray, a wear-resistant medium, a strong magnetic block, glue, a fixing bolt, a helical blade and the main shaft of the vertical mill; the bottom tray is positioned at the bottom of the vertical mill main shaft and is fixedly connected with the vertical mill main shaft through a fixing bolt; the helical blade is fixedly connected to the main shaft of the vertical mill; the strong magnetic block is fixedly connected with the abrasion part of the vertical mill main shaft through glue; the worn part at the spiral connection part of the spiral blade and the main shaft of the vertical mill is fixedly connected with a wear-resistant medium through glue; the two side protective sleeves are fixedly connected with the bottom tray; gaps between the two side protective sleeves and the abrasion part of the vertical mill main shaft are filled and connected through abrasion-resistant media; the upper wear parts of the two side protective sleeves are connected with the strong magnetic blocks through glue; the periphery of the strong magnetic repairing layer forming the magnetic protection layer is in arc transition connection. It is also characterized in that: the lower part is a rigid protection structure; the upper part is a strong magnetic protection structure. The strong magnetic magnet block is made of rare earth permanent magnetic material of a high-strength magnet; the wear-resistant medium is a mixed wear-resistant coating of two-in-one small particles of the DuPont 1201. The two side protective sleeves are welded with the bottom tray; two side protective sheaths cut and manufactured according to the spiral structure of the main shaft adopt DN500 material steel pipes, and the height of 2 side protective sheaths is 650 mm.

The utility model has the advantages that: because the bottom tray, the protective sleeve and the wear-resistant medium are utilized to form a rigid wear-resistant protective structure of the main shaft at the lower part, the magnetic protective structure is formed at the upper part by utilizing the adsorption effect of the strong magnetic block, a material protective layer is formed on the surface of the main shaft, the direct friction between the medium and the main shaft body in the motion process is avoided, the double wear-resistant protective structure can effectively protect the main shaft of the vertical mill, the service life of the main shaft is prolonged, the hidden danger of equipment is eliminated, the consumption of manpower and material resources is greatly reduced, the maintenance time is shortened, and the maintenance efficiency.

Description of the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is an enlarged view of a portion I of fig. 1.

In the drawings: 1. two side protective sleeves; 2. a bottom tray; 3. an abrasion resistant medium; 4. a ferromagnetic block; 5. glue; 6. fixing the bolt; 7. a helical blade; 8. a main shaft of the vertical mill; 9. a wear area.

The specific implementation mode is as follows:

the embodiments of the present invention will be described in further detail with reference to the accompanying drawings: the utility model provides a mining vertical mill double helix main shaft wear-resisting protection architecture, as shown in fig. 1~ 3: the double-spiral-blade vertical mill spindle comprises two side protective sleeves 1 of a double-spiral spindle of a vertical mill, a bottom tray 2, a wear-resistant medium 3, a strong magnetic block 4, glue 5, a fixing bolt 6, a spiral blade 7 and a vertical mill spindle 8. The helical blade 7 is fixedly connected with a main shaft 8 of the vertical mill; the two side protective sleeves 1 are welded with the bottom tray 2; gaps between the protective sleeves 1 on the two sides and the worn vertical mill main shaft 8 are connected by glue 5 after the wear-resistant medium 3 is filled; the worn parts on the upper parts of the two side protective sleeves 1 are fixedly connected with the strong magnetic blocks 4 in an embedding and bonding mode through glue 5; the wear-resistant medium 3 is connected with the peripheral repairing layer of the strong magnetic block 4 in a laying manner; the vertical mill main shaft 8 is connected with the bottom tray 2 through a fixing bolt 6; the utility model discloses a theory of operation is: when the double-helix main shaft 8 of the vertical mill is used, if the two sides of the main shaft are abraded and the parts of the abrasion area 9 are continuously deepened and enlarged, the abrasion can be continuously increased when the double-helix main shaft is continuously used until the risk of shaft breakage and production stop exists. Firstly, washing the residual ore pulp on the double-helix main shaft 8 of the vertical mill, and polishing the surfaces of the abrasion areas 9 on the two sides of the main shaft for visible light. The tray 2 with the worn bottom of the main shaft 8 is detached, a new tray is replaced and fixed by the fixing bolt 6, the thickness of the tray at the bottom is formed by cutting a manganese steel plate with the thickness of 50mm, and the diameter of the tray is phi 550 mm. Weld both sides protective sheath 1 on the tray of bottom, both sides protective sheath is formed for cutting according to main shaft helical structure with DN500 steel pipe, and the protective sheath height is 650mm, totally 2, fills up the space between the vertical mill main shaft 8 of both sides protective sheath 1 and wearing and tearing with wear-resisting medium 3, forms the wear-resisting protective structure in lower part. Secondly, the strong magnetic blocks 4 are embedded into the abrasion parts on the upper parts of the protective sleeves 1 on the two sides and fixed by glue 5, the strong magnetic blocks are embedded according to the abrasion depth of the abrasion parts to form a strong magnetic protection structure, the peripheries of the repair layers of the strong magnetic blocks 4 are laid by wear-resistant media 3, the peripheries of the repair layers are ensured to be in arc transition, the impact resistance is reduced, and the impact on the peripheries of the strong magnetic structures is avoided when the main shaft works. And finally, baking the surface of the lower wear-resistant protection structure by using a heating device to accelerate the solidification of the wear-resistant medium 3, so that the lower wear-resistant protection structure is firmer. The heating device can generally adopt a lamp baking mode. The environment temperature for curing the wear-resistant repairing agent is guaranteed to be 20-25 ℃ through a lamp baking mode, the problem that curing is difficult due to too low temperature is avoided, the maintenance time is long, and the curing effect is influenced is avoided, because the environment temperature is low in winter, after the vertical mill access door is closed, the vertical mill access door is baked by using a heating device for 16-24 hours generally, the environment temperature is high in summer, the vertical mill access door can be baked under the condition that the access door is not closed, and the baking time is 10-16 hours generally. Because the high-strength magnetic conductive adhesive has good viscosity, the protective sleeve is further fixed, the sliding of the protective sleeve is prevented, and the water caltrops at the periphery of the high-strength magnetic material are repaired, so that the impact resistance is reduced; and baking the surfaces of the protective structures after repairing the two sides by using a heating device to accelerate the curing of the wear-resistant medium 3, thereby completing the repairing work. The strong magnet block is a rare earth permanent magnet material of a high-strength magnet, the specification of the magnet block is 30 multiplied by 20 multiplied by 10, the magnetic field intensity is 600 millitex, and the wear-resistant medium is a mixed wear-resistant coating of two-in-one small particles of Dupont 1201.

Claims (4)

1. A double-helix main shaft wear-resistant protection structure of a mining vertical mill is characterized by comprising two side protection sleeves (1) of a vertical mill wear main shaft, a bottom tray (2), a wear-resistant medium (3), a strong magnetic block (4), glue (5), a fixing bolt (6), a helical blade (7) and a vertical mill main shaft (8); the bottom tray (2) is positioned at the bottom of the vertical mill main shaft (8) and is fixedly connected with the vertical mill main shaft (8) through a fixing bolt (6); the helical blade (7) is fixedly connected to a main shaft (8) of the vertical mill; the strong magnetic block (4) is fixedly connected with the worn part of the vertical mill main shaft (8) through glue (5); the abrasion part at the spiral connection part of the spiral blade (7) and the vertical mill main shaft (8) is fixedly connected with the wear-resistant medium (3) through glue (5); the two side protective sleeves (1) are fixedly connected with the bottom tray (2); gaps between the protective sleeves (1) on the two sides and the abrasion part of the vertical mill main shaft (8) are filled and connected through abrasion-resistant media (3); the upper abrasion parts of the two side protective sleeves (1) are connected with the strong magnetic blocks (4) through glue (5); the periphery of the strong magnetic repairing layer forming the magnetic protection layer is in arc transition connection.

2. The double-helix main shaft wear-resistant protection structure of the mining vertical mill according to claim 1, characterized in that: the lower part is a rigid protection structure; the upper part is a strong magnetic protection structure.

3. The double-helix main shaft wear-resistant protection structure of the mining vertical mill according to claim 1, characterized in that: the strong magnetic magnet block is made of rare earth permanent magnetic material of a high-strength magnet; the wear-resistant medium is a mixed wear-resistant coating of two-in-one small particles of the DuPont 1201.

4. The double-helix main shaft wear-resistant protection structure of the mining vertical mill according to claim 1, characterized in that: the two side protective sleeves (1) are welded with the bottom tray (2); two side protective sleeves (1) cut and manufactured according to the spiral structure of the main shaft adopt DN500 material steel pipes, and the height of 2 side protective sleeves (1) is 650 mm.

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