EP0105545A1
Expired / Lapsed
EP
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Method and apparatus for removing pipe coatings
Assignee: VOSKUILEN DIRK FRANS VAN
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Filing: 1983-09-06
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Granted: —
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Expires: 2003-09-06
Abstract
Abstract Bituminous and other coatings are removed from a pipe surface by directing powerful water jets, e.g. under a pressure of 300-600 bars, and preferably under an acute angle of incidence, against such pipe surface. The apparatus has one or more nozzles (12, 12), each provided with water supply means (15,16,17), in a frame (1) that can be mounted around the pipe (3) to be treated. In a preferred embodiment, the nozzles (12, 12) are arranged in groups on rotatable annular discs (11,11) which surround the pipe (3) with some clearance and which receive a reciprocating rotary movement during operation, whilst the frame (1) carrying such discs (11, 11) is adapted for travelling in longitudinal direction of the pipe (3). Both movements are coordinated, i.e. effected simultaneously and each nozzle (12) will thus follow a zigzag path along the pipe surface, thereby covering a vast area and removing bituminous or other coatings in a fast and efficient way.
Inventors
- 👤 Dirk Frans Van Voskuilen
- 👤 Frans Van Voskuilen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:48
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/023; F; F16; F16L; F16L58/00; F16L58/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
23 words
A.method of removing bituminous or other coatings from a pipe surface, by directing one or more powerful water jets against such pipe surface.
Claim 2
Dependent Claim
23 words
A.method of removing bituminous or other coatings from a pipe surface, by directing one or more powerful water jets against such pipe surface.
Claim 3
Dependent Claim
20 words
The method as claimed in claim 1, wherein the water jets have a pressure of between 300 and 600 bars.
Claim 4
Dependent Claim
29 words
The method as claimed in claim 1, wherein the water jets are directed against the pipe surface under an acute angle, when seen in circumferential direction of the pipe.
Claim 5
Dependent Claim
25 words
The method as claimed in claim 1, wherein the water jets are moved in longitudinal as well as in circumferential direction along the pipe surface.
Claim 6
Dependent Claim
49 words
The method of claim 4, wherein each of the water jets is moved in a zigzag path along the pipe surface, such zigzag path having the longitudinal direction of the pipe as its main direction, and wherein the paths of adjacent water jets are closely spaced in circumferential direction.
Claim 7
Dependent Claim
52 words
Apparatus for removing bituminous or other coatings from a pipe surface, essentially comprising: a frame (1) adapted for being mounted around the pipe (3) to be treated, one or more nozzles (12,12) directed against the pipe surface on such frame (1), and means (15,16,17) for feeding pressurized water to said nozzles (12,12).
Claim 8
Dependent Claim
52 words
Apparatus for removing bituminous or other coatings from a pipe surface, essentially comprising: a frame (1) adapted for being mounted around the pipe (3) to be treated, one or more nozzles (12,12) directed against the pipe surface on such frame (1), and means (15,16,17) for feeding pressurized water to said nozzles (12,12).
Claim 9
Dependent Claim
29 words
Apparatus as claimed in claim 6, wherein the nozzles (12,12) are directed against the pipe surface under an acute angle when measured in circumferential direction of the pipe (3).
Claim 10
Dependent Claim
26 words
Apparatus as claimed in claim 6, further comprising means for moving the nozzles (12,12) in longitudinal as well as in circumferential direction along the pipe surface.
Claim 11
Dependent Claim
52 words
Apparatus as claimed in claim 8, wherein said means are adapted for moving the nozzles (12,12) in a zigzag path along the pipe surface, said zigzag path having the longitudinal direction of the pipe (3) as its main direction, and the path of adjacent nozzles (12,12) being closely spaced in circumferential direction.
Claim 12
Dependent Claim
35 words
Apparatus as claimed in claim 8, wherein the means for moving the nozzles (12,12) in longitudinal direction comprise travelling wheels (5) and driving rollers (7) carried by said frame (1) and engaging the pipe (3).
Claim 13
Dependent Claim
14 words
Apparatus as claimed in claim 10, wherein the travelling wheels (5) are adjustably supported.
Claim 14
Dependent Claim
25 words
Apparatus as claimed in claim .10, wherein the driving rollers (7) are supported by hinged levers (9,9) which are biased to engage a pipe surface.
Claim 15
Dependent Claim
67 words
Apparatus as claimed in claim 8, wherein the means for moving the nozzles (12,12) in circumferential direction comprise one or more rotatable annular discs (11,11) positioned in planes perpendicular to the longitudinal axis of the pipe (3) and surrounding the pipe (3) concentrically with some spacing, said discs (11,11) carrying the nozzles (12,12) in groups, and further comprise means for rotating the discs (11,11) around their axes.
Claim 16
Dependent Claim
31 words
Apparatus as claimed in claim 13, wherein the means for rotating the annular discs (11,11) are adapted for giving the discs (11,11) a reciprocating rotational movement with a limited rotation angle.
Claim 17
Dependent Claim
33 words
Apparatus as claimed in claim 14, wherein the rotation means comprise a rope (19) passing over a driving roller (20), as well as a rack-and-pinion system (23,24) acting on the driving roller (20).
Claim 18
Dependent Claim
33 words
Apparatus as claimed in claim 13, wherein the rotation means of two adjacent discs (11,11) are coupled so as to cause the discs (11,11) to rotate at any time in mutually opposite directions.
References Cited (Backward Citations)
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