WO2017102090A1 - Racleur destiné à l'inspection et/ou au nettoyage de tuyaux - Google Patents

Racleur destiné à l'inspection et/ou au nettoyage de tuyaux Download PDF

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Publication number
WO2017102090A1
WO2017102090A1 PCT/EP2016/002125 EP2016002125W WO2017102090A1 WO 2017102090 A1 WO2017102090 A1 WO 2017102090A1 EP 2016002125 W EP2016002125 W EP 2016002125W WO 2017102090 A1 WO2017102090 A1 WO 2017102090A1
Authority
WO
WIPO (PCT)
Prior art keywords
pig
lamellae
sealing element
recesses
pipeline
Prior art date
Application number
PCT/EP2016/002125
Other languages
German (de)
English (en)
Inventor
Willi VOSS
Nico HEILE
Alexander Lindner
Heiner KRALLMANN
Hubert Lindner
Original Assignee
Rosen Swiss Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosen Swiss Ag filed Critical Rosen Swiss Ag
Publication of WO2017102090A1 publication Critical patent/WO2017102090A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/28—Constructional aspects
    • F16L55/40—Constructional aspects of the body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0557—Pigs with rings shaped cleaning members, e.g. cup shaped pigs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/10—Treating the inside of pipes
    • F16L2101/12—Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/30—Inspecting, measuring or testing

Definitions

  • the present invention relates to a pig for inspection and / or cleaning of pipelines, which in particular transport oil, gas or water, with at least one disc-shaped sealing element, which is designed to rest on the inner wall of the pipeline.
  • High temperature piping may include media having a temperature, e.g. of 150 ° C.
  • a temperature e.g. of 150 ° C.
  • the commonly used as sealing disks and, for example made of polyurethane plastic discs which are used in the typical piping with temperatures up to 60 ° C, too heavily damaged, so that with increasing path through the pipeline, the pig has an increasingly poorer seal , This can lead to slower speeds, including stalling of the pig somewhere in the often many kilometers long pipeline.
  • a more aggressive chemical environment is present due to the higher temperatures, so that the chemical resistance of the materials to be used with increasing temperatures is increasingly important.
  • by replacing the worn sealing washers a regularly high maintenance in both time and in financial terms required.
  • the sealing element is formed by at least two lamination plates arranged one behind the other in the longitudinal direction of the pig, whose lamellae are delimited by recesses located therebetween.
  • the recesses of two successively arranged slats are arranged offset from each other.
  • Such a pig according to the invention can also be used in high-temperature pipeline due to the higher temperature resistance of the lamella plates.
  • a lamella plate has a shape designed for use in the pipeline, the envelope of which is substantially round.
  • individual slat plates can also have, for example, only four slats, preferably uniformly distributed over the circumference.
  • the lamellae are flexible or flexible transversely to their longitudinal extension and are connected to form a lamella plate towards the middle.
  • a lamella plate can be made in one piece from a metal sheet and is designed so flexible, preferably from a spring steel, that the lamella len with respect to a forward movement in the tube to the rear, can roughly bend in the direction of the rear pig end, if the lamella plate is made relative to the pipe to be traversed by cross-section with excess.
  • the lamellar plates have a necessary flexibility.
  • the outer edges of the lamella plates may be rounded, wherein the curvature of the outer edge is preferably matched in the bent state to the curvature of the inner wall of the pipe to be cleaned such that depending on the bending of the blade, the outer edge rests optimally against the inner wall of the tube.
  • the outer edge of the lamella then describes in the relaxed state of the lamella no circular arc section but this is approximated.
  • the sealing element which is preferably formed directly by lamination plates arranged one behind the other, constitutes a labyrinth seal which effects a sufficiently large sealing seat for propulsion of the pig in the pipeline.
  • the lamellae of the lamella plates formed of identical material lie partially against one another, in particular with their flat sides being executed to one another.
  • the lamellae are sufficiently rigid, so that a lamella of a lamellar plate does not lie in the recess formed between two lamellae of an adjacent lamination plate, which would lead to undesired stiffening of the sealing element, in particular during cornering or changes in the free pipe cross-section.
  • the lamellae are arranged so close together that the sealing effect described at least in the case of slightly curved during operation of the pig lamella results.
  • the lamellar plates with spacers can be spaced apart from one another at any fastening means arranged in the region of the longitudinal center axis of the pig.
  • the slats can also lie directly against one another and, for example, be inserted or replaced as a finished slat sheet package.
  • the recesses are widened radially outwardly from a longitudinal center axis of the pig, wherein the extent of the expansion can be matched to the curvature of the slats in the pipeline.
  • the recesses which may also be referred to as notches, thus extend as incisions from an outer envelope of the lamella plate in the direction of its center.
  • the recesses extend in the radial direction up to the envelope over a distance which is between 50 and 75% of the radial extent of the laminated sheet material, in particular thus towards an inner edge of a plate provided with a central recess. lenblechs.
  • the lamellar plates are mounted on the pig body.
  • the rigidity of the laminations increases towards their middle. At the remote from the central axis of the pig body ends of the slats, these are thus significantly more mobile. In this area, the slats of the successively arranged lamellar plates are better and thus closer to each other and can however be used for pipelines with large fluctuations in the free inner diameter.
  • individual laminations have a thickness of between 0.1 and 2.0 mm, preferably between 0.2 and 1 mm, in order to have sufficiently high flexibility in, for example, used noble and spring steels.
  • a particularly advantageous embodiment of the invention is given when the blade lying in front in operation in the direction of travel has a greater strength than the underlying slat to the seal formed by the laminations, possibly in addition to a possible support by a support means to give higher rigidity.
  • opposite edges of a recess may have mutually facing, complementary abutment areas, which are flattened, so that the edges abut each other when bending the lamellae.
  • the recesses can have side regions which are then located on the front or rear sides of the lamellae considered in the direction of travel, which lie on or lie against one another when the lamellae are bent.
  • the pig is preferably provided with at least one support means for support on the pipeline wall.
  • the lamella sheets thus essentially have a sealing function, while the pig is preferably supported only to a maximum of 75% on the lamella plates.
  • a hundred percent sealing is usually not achievable.
  • a certain leakage flow from in the operating case from the back of the slats oppressive media is even advantageous for cleaning and Mittransport the cleaned material.
  • the sealing elements may have for this purpose or for speed adjustment by the medium Wegströmmbare recesses. Preferably, these can be variable in size, so that there is an adjustment option for the pig speed.
  • the individual laminations may be formed relative to each other about the longitudinal center axis of the pivotable and fixable in different positions.
  • the recesses of the sealing element may be the recesses of the laminations forming the laminations or further recesses in the laminations.
  • the support means may in particular be arranged in front of the sealing element and preferably have a smaller diameter.
  • the diameter of the support means is especially chosen so that it is slightly larger than the inner diameter of the pipeline to be processed.
  • the sealing function of the slats is improved because the slats can move worse forward.
  • a folding of the slats is effectively prevented in a preferred arrangement of the support means immediately before the sealing element.
  • supporting means and lamellae are dimensioned so that the lamellae, bent in an operating position in a pipeline, at least partially rest on the support means lying directly in front of them, which can center the pig in the pipeline. At least towards the outside, the lamellae are then in contact with the support means.
  • a support means which is formed for example by a ring brush, serve only or predominantly to stabilize the respective subsequent lamellae, while one or more further support means, behind which then no lamellae are arranged, for centering the pig in the pipeline can be used.
  • the support element may be formed, for example, as a ring brush, which may be formed by a plurality of circumferentially next to each other, preferably radially outwardly directed brush tufts or wires.
  • the diameter of the lamellar plates is chosen to be larger than the diameter of the pipeline to be pigged, so that the spring effect of the whose lamellae also apply without any operating pressure to the inner wall of the respective pipeline section.
  • the lamella plates are formed of an austenitic or ferritic, high-temperature resistant steel and can be used without problems in pipelines with operating temperatures> 60 ° C, in particular> 80 ° C and up to 200 ° C. These materials are sufficiently chemically resistant to these at high temperatures for pipelines.
  • Inventive lamellae made of particular spring steel can be used differently than sealing elements made of conventionally used materials long term and repeatedly.
  • FIG. 1 shows an article according to the invention in a longitudinal section
  • FIG. 2 shows the object according to FIG. 1 in a perspective view obliquely from behind
  • Fig. 4 is a view of two longitudinally successively arranged lamellar sheets. Individual technical features of the embodiments described below may also be combined in combination with previously described embodiments as well as the features of the independent claim and any further claims to objects according to the invention. If appropriate, functionally equivalent elements are provided with identical reference numbers.
  • a pig 1 which in the present case is designed as a cleaning pig for the cleaning of pipelines (FIG. 1), has four disk-shaped sealing elements 2.
  • supporting elements 3 In front of the sealing elements 2 in the longitudinal direction F, supporting elements 3, each designed as ring brushes, have a slightly smaller outer diameter as the sealing elements. 2
  • Both the sealing elements 2 as well as the supporting means 3 provided for supporting the pig are fastened on a central body 4, wherein the fastening takes place via screw connections on flanges 5.
  • the flanges 5 are connected to the central body, for example, welded and thus part of the central body.
  • Dashed lines and provided with the reference numeral 6 are only for the lower part of the pig below a longitudinal axis 7 drawn sealing elements 2 in a position in which they are bent in an operating position in the pipe. To avoid any tilting of the sealing elements 2 during insertion into the tube or to minimize the risk for this, the sealing elements 2 may already be pre-bent.
  • the respective sealing elements 2 are formed by two lamination plates arranged one behind the other in the longitudinal direction. Of the sealing elements only a lamellar plate in Fig. 2 can be seen, wherein the respective fins 11 are separated by recesses 9.
  • the detail section X marked in FIG. 2 is shown enlarged in FIG.
  • the recesses 9 of the rear sheet viewed in the longitudinal direction, are covered by lamellae 11 of the front lamella sheet in front of it. Accordingly, the recesses of different slat plates are arranged offset from each other here.
  • Multiple circlips 12 induce the formation of the ring brushes 3 by means of a plurality of bristles extending in the radial direction.
  • the edges 13 of individual lamellae 11 are preferably formed curved, wherein the curvature can be designed such that they optimally invest in a bending of the fins 11 to the pipe wall.
  • the individual laminations are cut from a sheet and provided with symmetrically distributed over the circumference recesses 9, starting from a Extend longitudinal central axis outward radially up to an envelope and so provide the spring plate sufficient elasticity available to be bent in accordance with the pipe can.
  • the recesses can widen outward, which is not shown in FIG. 4, however.
  • the recesses extend in the radial direction toward an inner edge 14 of the spring plate over slightly more than 50% of the extension of the lamella plate in the radial direction. This gives them sufficient flexibility with sufficient possibility of attachment to the central body or associated flanges 5 by means of holes 15 using fasteners.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Cleaning In General (AREA)

Abstract

Racleur destiné à l'inspection et/ou au nettoyage de tuyaux, dans lesquels circulent notamment de l'huile, du gaz ou de l'eau, comprenant au moins un élément d'étanchéité (2) en forme de disques et conçu pour venir en contact avec la paroi interne du tuyau, l'élément d'étanchéité (2) étant conçu par au moins deux tôles à lamelles qui se succèdent dans la direction longitudinale du racleur (1) et dont les lamelles (11) sont délimitées par des évidements intermédiaires, les évidements (9) des différentes tôles à lamelles étant disposés de manière mutuellement décalée.
PCT/EP2016/002125 2015-12-18 2016-12-16 Racleur destiné à l'inspection et/ou au nettoyage de tuyaux WO2017102090A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015122252.3 2015-12-18
DE102015122252.3A DE102015122252A1 (de) 2015-12-18 2015-12-18 Molch zur Inspektion und/oder Reinigung von Rohrleitungen

Publications (1)

Publication Number Publication Date
WO2017102090A1 true WO2017102090A1 (fr) 2017-06-22

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PCT/EP2016/002125 WO2017102090A1 (fr) 2015-12-18 2016-12-16 Racleur destiné à l'inspection et/ou au nettoyage de tuyaux

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WO (1) WO2017102090A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112173723B (zh) * 2020-10-30 2022-03-11 河南工业大学 一种远程气力输送管道清管方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH244293A (de) * 1945-07-23 1946-09-15 Meili L H Lamellenbürste.
US2972156A (en) * 1959-01-05 1961-02-21 Williamson Inc T Pipeline cleaning device
FR2571636A1 (fr) * 1984-10-17 1986-04-18 Trest Juzhvodoprovod Dispositif de nettoyage pour l'elimination de depots formes sur la surface interne d'une tuyauterie, et de formation d'un revetement protecteur
FR2793171A1 (fr) * 1999-05-06 2000-11-10 Inst Francais Du Petrole Racleur optimise pour conduite
WO2014011718A1 (fr) * 2012-07-12 2014-01-16 Shell Oil Company Racleur de pipeline et son procédé d'utilisation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE676776C (de) * 1937-02-10 1939-06-10 Zwietusch E & Co Gmbh Treiber fuer Rohrpostbuechsen
GB2501312B (en) * 2012-04-20 2017-04-26 Cokebusters Ltd Improvements in or relating to pipeline pigs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH244293A (de) * 1945-07-23 1946-09-15 Meili L H Lamellenbürste.
US2972156A (en) * 1959-01-05 1961-02-21 Williamson Inc T Pipeline cleaning device
FR2571636A1 (fr) * 1984-10-17 1986-04-18 Trest Juzhvodoprovod Dispositif de nettoyage pour l'elimination de depots formes sur la surface interne d'une tuyauterie, et de formation d'un revetement protecteur
FR2793171A1 (fr) * 1999-05-06 2000-11-10 Inst Francais Du Petrole Racleur optimise pour conduite
WO2014011718A1 (fr) * 2012-07-12 2014-01-16 Shell Oil Company Racleur de pipeline et son procédé d'utilisation

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