Repair method for burnt-red and air-leakage part of pipeline

A pipe and wind running technology, which is applied in the direction of pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of high cost, prone to burning red and running wind on the pipe wall, and long time on the pipe wall, so as to achieve reliable The effect of patching

Inactive Publication Date: 2015-10-28
JIANGSU YONGGANG GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Blast furnaces have higher and higher requirements for air temperature. After the air supply temperature becomes higher, it has a significant negative impact on the service life of pipeline equipment; After baking, the pipe wall on the outside of the pipe is prone to burning red and running wind, especially at the three-fork of the hot air pipe; at present, it takes too long and the cost is too high to replace the damaged pipe wall during maintenance

Method used

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  • Repair method for burnt-red and air-leakage part of pipeline

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0019] The method of repairing the place where the pipe burns red and runs out of wind, the repairing steps are as follows:

[0020] (1) if figure 1 As shown, first confirm how big the cut hole 11 will be produced after the cutter cuts off the damaged pipe wall around the hot red and windy part 1 of the pipe, and then determine the size of the metal frame 2 and the metal cover plate 21 according to the size of the cut hole 11, The metal frame 2 needs to be able to surround the cut hole 11, and the metal cover plate 21 needs to be able to close the opening of the metal frame 2. The metal cover plate 21 is also provided with an exhaust hole 24, and the exhaust hole 24 is provided with an exhaust pipe 22. A valve 23 is arranged on the exhaust pipe 22;

[0021] (2) Make the metal frame 2 and the metal cover plate 21, and then prepare the re...

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Abstract

The invention discloses a repair method for a burnt-red and air-leakage part of a pipeline. The repair method comprises the following repair steps: (1) determining the sizes of a metal border and a metal cover plate according to the size of a cutting hole at first, further forming an exhaust hole in the metal cover plate, arranging an exhaust tube on the exhaust hole, and arranging a valve on the exhaust tube; (2) producing the metal border and the metal cover plate, and then preparing a refractory castable and a heat-insulation fibre blanket; (3) cutting off the damaged pipe wall around the burnt-red and air-leakage part of the pipeline by a cutting knife; (4) welding the metal border to the outer side of the cutting hole, and then pouring the refractory castable into the metal border and compacting the refractory castable; and (5) covering the refractory castable with the heat-insulation fibre blanket, then hermetically welding the metal cover plate to the opening of the metal border, opening the valve on the exhaust tube to exhaust the remainder water in the refractory castable, and closing the valve after the exhaust is completed. The repair method is capable of rapidly, simply and conveniently, and reliably repairing the burnt-red and air-leakage part of the pipeline.

Description

technical field [0001] The invention relates to the field of blast furnace ironmaking, in particular to a method for repairing the red-hot and runaway places on the air supply pipe. Background technique [0002] Blast furnaces have higher and higher requirements for air temperature. After the air supply temperature becomes higher, it has a significant negative impact on the service life of pipeline equipment; After baking, the pipe wall on the outside of the pipe is prone to burning red and running wind, especially at the three-fork of the hot air pipe; at present, it takes too long and the cost is too high to replace the damaged pipe wall during maintenance. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a repairing method that can quickly, easily and reliably repair the red-hot and runaway parts of the pipeline. [0004] In order to solve the above problems, the technical solution adopted in the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/168
CPCF16L55/168F16L55/175
Inventor 周培李挺周国兵张艳耿丽华
Owner JIANGSU YONGGANG GROUP CO LTD
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