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Method and apparatus for checking tubular articles

A kind of object and tubular technology, applied in the field of tubular objects, can solve the problem of high cost of assembly and disassembly inspection equipment, and achieve the effect of ensuring stability

Inactive Publication Date: 2009-05-27
CORENSO UNITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this is that the cost of assembling and disassembling the inspection equipment is very high, so that only a few tubular parts can be inspected by the same inspection equipment in a reasonable time

Method used

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  • Method and apparatus for checking tubular articles
  • Method and apparatus for checking tubular articles
  • Method and apparatus for checking tubular articles

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Experimental program
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Embodiment Construction

[0035] FIG. 1 shows a sectional side view of a device 1 according to the invention, which consists of a hollow cylinder 2 , two end flanges 3 , 4 and a pressure jacket 5 . The hollow cylinder 2 has an opening 6 through which a pressure medium connection 7 of the pressure jacket 5 is led to the outside. The hollow cylinder 2 is delimited at the end by two flanges 3 , 4 which are screwed to the hollow cylinder by means of fastening screws 8 . The flanges 3 , 4 have an opening 9 through which the tubular body 10 to be tested can be pushed.

[0036] For the intended application, a piece of paper tube is considered as object 10 , which is pushed into device 1 over its entire length and whose outer surface 11 is in direct contact with inner surface 12 of pressure jacket 5 . However, it is also conceivable to use the device 1 for testing other tubular bodies, for example plastic cylinders. The outer surface 13 of the pressure jacket 5 bears against the inner surface 14 of the hollo...

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Abstract

The invention relates to a method for checking tubular articles (10), in particular a paper sleeve, in a cylindrical pressure chamber, and to an apparatus (1) for implementing the method. In order to improve handling during checking, the invention provides a method which uses a cylindrical pressure chamber for checking the tubular articles (10), wherein the tubular article (10) which is to be checked is accommodated in a hollow cylinder (2) by way of a pressure casing (5), and the pressure casing (5) is supported against the hollow cylinder (2) when the latter is subjected to the action of a pressure medium. As a result of the pressure casing (5) being supported on the hollow cylinder (2), it is only possible for the volume of the pressure casing (5) to change in the radial direction in relation to the tubular article. The inner surface (12) of the pressure casing (5) here positions itself uniformly against the surface of the article (10) and, in the case of a further increase in pressure, it is thus possible to record the compressive strength up to a preset final pressure being reached or, should damage to the tubular article (10) have occurred, the maximum compressive strength can be established.

Description

technical field [0001] The invention relates to a method for testing tubular objects, in particular paper tubes, in a cylindrical pressure chamber and to a device for carrying out the method. Background technique [0002] This method can be applied to all tubular objects to test their compressive strength. However, the method was developed especially to subject the paper tubes to a standardized test with regard to compressive strength. Depending on the intended application, the tubular object, i.e. the paper tube, must have sufficient compressive strength so that the material wound onto the bobbin can be wound without damaging the core and in particular transported after winding . Such tubular walls are used on a large scale for a variety of applications, for example in the paper industry for winding newspaper base paper, where the paper cylinders can have a length of more than 10 meters and must withstand loads of up to 10 tons. In addition, such tubular bodies are also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
CPCG01N2203/0411G01N3/12G01N2203/0274G01N2203/0019G01N33/34
Inventor A·施瓦布
Owner CORENSO UNITED
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