Rapid curing process and device of centrifugal ductile cast iron pipe cement lining
A technology of centrifugal ductile iron and cement lining, which is applied in the direction of manufacturing tools, strengthening molding, ceramic molding machines, etc., can solve the problems of long production cycle, increased production cost, large demand for cast pipes, etc. The effect of reducing manufacturing cost and accelerating hydration reaction
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Embodiment 1
[0067] The rapid curing process of the cement lining of the centrifugal ductile iron pipe described above is applied to the cast iron pipe of DN150, and the process method is as follows:
[0068] After the cast iron pipe of DN150 is coated and centrifuged, it is hoisted into the health furnace 1, and when the cast iron pipe is filled with the health furnace 1, the health furnace cover 6 is covered, and the natural health is maintained for 4 to 5 hours after the above step d Finally, open the steam valve 3 and enter the step e) for 6-7 hours of steam health preservation. The first hour of steam health preservation is the small steam health preservation stage, and the valve is slowly opened from small to large; at the beginning, the valve cannot be opened too large , to avoid that the cement layer has not passed the initial setting period. When the steam is too large, the temperature will rise sharply, which will easily cause the cement layer to bubble. Then it is the big steam ...
Embodiment 2
[0071] The rapid curing process of the cement lining of the centrifugal ductile iron pipe described above is applied to the cast iron pipe of DN500. The process method is as follows:
[0072] After the cast iron pipe of DN500 is coated and centrifuged, it is hoisted into the health furnace 1, and when the cast iron pipe is filled with the health furnace 1, the health furnace cover 6 is covered, and the natural health is maintained for 4 to 5 hours after the above step d Finally, open the steam valve 3, and enter step e to carry out 7-8 hours of steam health preservation. The first hour of steam health preservation is the small steam health preservation stage, and the valve is slowly opened from small to large; at the beginning, the valve cannot be opened too large, Avoid that the cement layer has not passed the initial setting period. When the steam is too large, the temperature will rise sharply, which will easily cause the cement layer to bubble. Then there is the big steam ...
Embodiment 3
[0075] The rapid curing process of the cement lining of the centrifugal ductile iron pipe described above is applied to the cast iron pipe of DN1000, and the process method is as follows:
[0076] After the cast iron pipe of DN1000 is coated and centrifuged, it is hoisted into the health furnace 1, and when the cast iron pipe is filled with the health furnace 1, the health furnace cover 6 is covered, and the natural health is maintained for 5 to 6 hours after the above step d Finally, open the steam valve 3, and enter step e for 8-9 hours of steam health preservation. The first 2 hours of steam health preservation is the small steam health preservation stage, and the valve is slowly opened from small to large; at the beginning, the valve should not be opened too large to avoid The cement layer has not passed the initial setting period. When the steam is too large, the temperature will rise sharply, which will easily cause the cement layer to bubble. Then there is the big steam...
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Abstract
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