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Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe

A technology without oxidation furnace and radiant tube, which can be used in the direction of measuring the acceleration and deceleration rate of fluid and using liquid/vacuum degree for liquid tightness measurement, which can solve the problems of radiation tube leakage and difficulty in simultaneous detection, and reduce labor intensity. , the effect of simple operation

Active Publication Date: 2011-11-09
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still no effective method to conduct online leak testing for a large number of radiant tubes, especially the synchronous detection in normal production is a difficult problem

Method used

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  • Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe
  • Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe
  • Online and rapid leakage detecting method for roller hearth type non-oxidation furnace radiating pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The installation of this embodiment is as follows figure 1 As shown, a roller hearth type non-oxidizing furnace radiant tube online rapid leak detection method is carried out according to the following steps:

[0020] (1) According to the external dimensions of the flange mouth at the connection between the burner body and the exhaust gas pipe 1, use asbestos pads to make the gasket 7 that matches the flange, and use tinplate to make the explosion-proof disc 8; the structure of the gasket 7 is as follows image 3 As shown, the diameter R1 of the inner hole of the gasket 7 is equal to the inner diameter of the flange, the width D1 of the gasket 7 does not exceed the outer diameter of the flange, and the diagonal width D2 of the gasket 7 does not exceed the position of the bolt hole; the structure of the explosion-proof disc 8 is as follows Figure 4 As shown, the explosion-proof disk 8 is a circular explosion-proof disk with a protruding part 9, and the outer diameter R2...

Embodiment 2

[0026] The installation of this embodiment is as follows figure 1 As shown, a roller hearth type non-oxidizing furnace radiant tube online rapid leak detection method is carried out according to the following steps:

[0027] (1) According to the external dimensions of the flange mouth at the connection between the burner body and the exhaust gas pipe 1, use asbestos pads to make the gasket 7 that matches the flange, and use tinplate to make the explosion-proof disc 8; the structure of the gasket 7 is as follows image 3 As shown, the diameter R1 of the inner hole of the gasket 7 is equal to the inner diameter of the flange, the width D1 of the gasket 7 does not exceed the outer diameter of the flange, and the diagonal width D2 of the gasket 7 does not exceed the position of the bolt hole; the structure of the explosion-proof disc 8 is as follows Figure 4 As shown, the explosion-proof disk 8 is a circular explosion-proof disk with a protruding part 9, and the outer diameter R2...

Embodiment 3

[0033] The installation of this embodiment is as follows figure 1 As shown, a roller hearth type non-oxidizing furnace radiant tube online rapid leak detection method is carried out according to the following steps:

[0034] (1) According to the external dimensions of the flange mouth at the connection between the burner body and the exhaust gas pipe 1, use asbestos pads to make the gasket 7 that matches the flange, and use tinplate to make the explosion-proof disc 8; the structure of the gasket 7 is as follows image 3 As shown, the diameter R1 of the inner hole of the gasket 7 is equal to the inner diameter of the flange, the width D1 of the gasket 7 does not exceed the outer diameter of the flange, and the diagonal width D2 of the gasket 7 does not exceed the position of the bolt hole; the structure of the explosion-proof disc 8 is as follows Figure 4 As shown, the explosion-proof disk 8 is a circular explosion-proof disk with a protruding part 9, and the outer diameter R2...

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Abstract

The invention relates to an online and rapid leakage detecting method for a roller hearth type non-oxidation furnace radiating pipe. A sealing gasket and an explosion preventing sheet are manufactured according to the size of a flange in the connecting position of a burning nozzle body and a waste gas pipe; a single burning nozzle is closed, a burning nozzle waste gas pipe is disassembled, the sealing gasket and the explosion preventing sheet are installed between a burning nozzle flange and a waste gas pipe flange, and a bolt is tightly screwed; a gas pipeline pressure detecting hole or a combustion-supporting air pipeline pressure detecting hole is opened, and a pressure gage is connected; a combustion-supporting air pipeline is disconnected from a black rubber pipe, nitrogen is injected into a combustion-supporting air pipe, and the pressure of the pipeline is maintained at 6+ / -0.5KPa, the nitrogen injection stops, and the seal of an injecting opening is maintained; that whether a numerical value of the pressure gage is different from a pressure value shown when the nitrogen injection stops or not is observed after two or three minutes; and if the pressure is reduced, the radiating pipe is proved to have a leakage point. The invention can carry out effective, convenient and rapid leakage detection on the roller hearth type non-oxidation furnace radiating pipe and synchronously carry out leakage detection during normal production.

Description

technical field [0001] The invention relates to an on-line rapid leak detection method for a radiant tube of a roller hearth type non-oxidation furnace, specifically for detecting whether there is air leakage in the radiant tube during normal production of the roller hearth furnace without affecting production method. Background technique [0002] At present, the roller hearth non-oxidation furnace has good sealing performance and no or very little oxide scale in the furnace, so that excellent surface quality can be obtained under the premise of ensuring various properties of the steel plate. This kind of heat treatment furnace is favored by various steel mills because it can meet various heat treatment requirements in the steel market. If the sealing of the furnace body is not good or the radiant tube is burned through, causing combustion air or unburned gas to leak into the furnace, an oxidizing atmosphere will be generated in the furnace, which will not only cause oxide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/28
Inventor 姚永宽王道远马正贵杨兆根宋耀华盘国力吴俊平朱登山
Owner NANJING IRON & STEEL CO LTD
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