Field repairing method of welding cracks of feeding slip-ring body of large-sized slide mill
A technology for welding cracks and repair methods, which is applied in the field of on-site repair of welding cracks in the feed slip ring body of large-scale sliding shoe mills, can solve problems affecting the dimensional accuracy of slip rings, surface roughness of shape and position tolerances, unsatisfactory repair welding, slip rings, etc. Ring deformation and other problems, to achieve the effect of long manufacturing cycle, avoid replacement and reinstallation, and save costs
A technology for welding cracks and repair methods, which is applied in the field of on-site repair of welding cracks in the feed slip ring body of large-scale sliding shoe mills, can solve problems affecting the dimensional accuracy of slip rings, surface roughness of shape and position tolerances, unsatisfactory repair welding, slip rings, etc. Ring deformation and other problems, to achieve the effect of long manufacturing cycle, avoid replacement and reinstallation, and save costs
CN101890610AInactive Publication Date: 2010-11-24CITIC HEAVY INDUSTRIES CO LTD +1
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[0037] combine Figure 1-3 , such as a large sliding shoe mill with an outer diameter of 5m in the middle cylinder 2, the maximum outer diameter of the slip ring 1.2 in the feed slip ring body 1 is 5.23m, and the largest outer diameter of the slip ring 1.2 is matched with the sliding shoe bearing pad , the width at the maximum outer diameter of the slip ring 1.2 is 0.74m, if the slip ring 1.2 and the web 1.1 in the feed slip ring body 1 with a T-shaped cross-section have cracks, the method according to the present invention needs to go through the following process:
[0038] (1) On-site inspection
[0039] ①When the feed slip ring body 1 produces welding cracks, in order to prevent the continuous extension of the welding cracks, first use coloring and flaw detection to find out the depth, width and length of each crack, and find out the two parts of each welding crack. At the end points, a Φ20mm crack stop hole should be drilled at 50mm outside the extension line of the two e...
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The invention provides a field repairing method of welding cracks of a feeding slip-ring body of a large-sized slide mill, wherein a field detection step comprises the following steps of coloring, detecting defects, drilling crack arrest holes and cleaning and polishing a surface; a repairing welding step comprises reinforcing plate repairing welding, repairing welding method and defect re-detection; in a machine processing step, a supporting frame arranged near a feeding slip-ring body is used for installing a turning machine for grinding and processing the surface of the maximum outside diameter of a slip ring; and finally, the field repairing is achieved by replacing a new bearing bush and commissioning and inspecting a cylinder body. The invention utilizes an installation base of the traditional device without disassembling the cylinder body of the traditional large-sized slide mill and has short repairing period, simple operation and safe and reliable running. The field repairing method of the welding cracks of the feeding slip-ring body is also suitable for the field reparation of welding cracks of a discharging slip-ring cone.
Description
technical field [0001] The invention belongs to the technical field of tube mills, and in particular relates to an on-site repair method for welding cracks in a feed slip ring body of a large-scale sliding shoe mill. Background technique [0002] Tube mill refers to a cylindrical rotary grinding machine with a long length and size. The cylinder aspect ratio of the tube mill is greater than 2.5. Because of its tubular shape, it is collectively called "tube mill". Tube mills are subdivided into sliding shoe mills and hollow shaft mills, and sliding shoe mills with a cylinder diameter greater than 4m are called large sliding shoe mills. Tube mills have been widely used in building materials, metallurgy, chemical industry, electric power, ceramics, medicine and national defense industries. [0003] With the development of my country's cement industry technology in recent years, the use of large sliding shoe mills has become quite common. Compared with hollow shaft mills, large ...
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Patent Timeline
24 Nov 2010
Publication
CN101890610A
- IPC
- B23P6/04
- Inventors
- 刚梅林; 俞章法