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Apparatus for inspecting honeycomb structures

A technology for honeycomb structure and defect inspection, which is applied in the direction of measuring devices, optical testing of defects/defects, and material analysis through optical means, and can solve problems such as sensitivity drop

Active Publication Date: 2009-09-23
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in the invention disclosed in Patent Document 1, it is found that the defects are reduced to about 10 times the average pore diameter of the honeycomb structure and are not exceptionally larger than normal pores, or the defects are located in the honeycomb structure. In the case of the vicinity of the outer periphery, there is a possibility of a decrease in sensitivity

Method used

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  • Apparatus for inspecting honeycomb structures
  • Apparatus for inspecting honeycomb structures
  • Apparatus for inspecting honeycomb structures

Examples

Experimental program
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Effect test

Embodiment 1

[0067] (Example 1) use figure 1 The illustrated honeycomb structure defect inspection device inspects defects of the honeycomb structure 20 which is a porous body. The honeycomb structure 20 as the subject is cylindrical with a diameter of 150 mm and a length of 150 mm, and the cell density is 40 cells / cm 2 , A sealed honeycomb structure used as a DPF was used. The rectifying plate 41 is a member plated with chrome on stainless steel, and a rectifying plate with 100 meshes and a hole interval of 50 μm is used, and it is arranged at a distance of 1 mm from the fine particle discharge surface 54 of the honeycomb structure. The airflow along the outer periphery of the honeycomb structure 20 is formed by sending air at 6 L / min from 32 nozzles 91 formed on the header 59 .

[0068] exist figure 1 A honeycomb structure is installed on an installation table 22 of the illustrated honeycomb structure defect inspection device using a seal 24 . Also, burning incense produces fine part...

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Abstract

According to an apparatus for inspecting defects of a honeycomb structure that is provided with a current plate (41) and an air current formation means (air source (92) and a header tube (59)), fine defects or defects taking place in the vicinity of an outer periphery of the honeycomb structure can be detected with high sensitivity.

Description

technical field [0001] The present invention relates to an apparatus used for inspecting the presence or absence of pores (defects) larger than the pore diameter of a honeycomb structure that do not exist in a normal honeycomb structure. Background technique [0002] In view of the impact on the environment, the need to remove particulate matter contained in exhaust gas discharged from automobile engines and the like has increased from exhaust gas. In particular, regulations on the removal of particulate matter (particulate matter PM) discharged from diesel engines tend to be strengthened all over the world. Under such circumstances, a diesel particulate filter (DPF) for trapping and removing PM is attracting attention. [0003] One example of the DPF is a filter having a plugged honeycomb structure (honeycomb filter). This honeycomb filter is composed of a porous partition wall with a plurality of compartments forming a fluid flow path, predetermined compartments with one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
CPCG01N21/95692G01N21/47G01N2015/0846G01N15/088
Inventor 赤尾隆嘉真藤博之井上纯及川圭太
Owner NGK INSULATORS LTD
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