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Liquid Purification

Treatment-element-and-method-for-treating-the-inside-of-pipes

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Treatment element and method for treating the inside of pipes

Details

Inventors: Van Der Does, Hendrik J.;
Assignee: Milieu Diensten Combinatie B.V. (Arnhem, NL)
Primary Examiner: Dean; Richard O.
Assistant Examiner: Chaudhry; Saeed
Attorney, Agent or Firm: Handal & Morofsky

A treatment element is provided for treating the inside of pipes, which element is bulged out by a medium flow presence in the pipe (1), while the movement of the element through the pipe can be controlled by a flexible pulling element. This treatment element (2) comprises a radially free compressible bag, the edge (5) of the open edge (6) of which is connected to the flexible pulling element (4). A wall pan (3) running in the peripheral direction of the bag is pressed against the inner wall of the pipe by the thrust of the medium, through which the inner wall is treated.

DETAILED DESCRIPTION I claim: 1.
A collapsible, foldable, pipeline treatment element for treatment of an airflow pipeline, said airflow pipeline having an inner wall with an internal cross-section and a restricted-access aperture through which said treatment element is insertable into said pipeline, said treatment element comprising: a) a flexible bag having front and rear ends with a front opening at said front end and shaped with an outer periphery engageable with said pipeline inner wall said outer periphery being surface textured to abrade said pipeline inner wall; b) a group of flexible pulling elements connected to said flexible bag at regular intervals around said front opening and meeting one another at a fixed position in front of said flexible bag; wherein said outer periphery is provided by a lengthwise extending portion of said bag, said bag having a constant cross-section throughout said lengthwise extending portion, said constant cross section of said bag corresponding with said internal cross-section of said airflow pipeline whereby said outer periphery is engageable with said pipeline inner wall continuously around said inner wall.
2.
A pipeline treatment element according to claim 1 having an airflow control opening at said rear end and wherein said bag tapers rearwardly between said outer peripery and said airflow control opening.
3.
A pipeline treatment element according to claim 2 wherein said bag is provided with airflow control means to vary the size of said airflow control opening.
4.
A pipeline treatment element according to claim 1 comprising a shape-retaining flow element situated in the bag.
5.
A pipeline treatment element according to claim 4 wherein said shape-retaining flow element is fixed relative to said outer periphery and has a conical forward side and an aerodynamically shaped rearward side.
6.
A pipeline treatment element according to claim 1 wherein said bag comprises a flexible edge around said front opening of said bag, said flexible edge tapering forwardly of said bag, said flexible pulling elements being connected to said bag at said edge whereby flexible pulling elements are held clear of said inner pipeline wall during treatment

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