EP0745436A1 - Rohrreinigungsmolch - Google Patents

Rohrreinigungsmolch Download PDF

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Publication number
EP0745436A1
EP0745436A1 EP95303784A EP95303784A EP0745436A1 EP 0745436 A1 EP0745436 A1 EP 0745436A1 EP 95303784 A EP95303784 A EP 95303784A EP 95303784 A EP95303784 A EP 95303784A EP 0745436 A1 EP0745436 A1 EP 0745436A1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
pipe
scraper elements
articulated
central body
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP95303784A
Other languages
English (en)
French (fr)
Inventor
Peter John c/o Shell Research Ltd. Collins
Vyvian Anthony c/o Shell Research Ltd. COX
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP95303784A priority Critical patent/EP0745436A1/de
Publication of EP0745436A1 publication Critical patent/EP0745436A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B08B9/0553—Cylindrically shaped pigs
    • 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

Definitions

  • the invention relates to a pipe cleaning device.
  • Pipe cleaning devices are widely used for cleaning the interior of pipes. These devices typically contain a sponge type body, bristles and/or scraper plates which remove debris from the inner surface of the pipe when the device is moved in an axial and/or tangential direction through the pipe.
  • the device may be moved through the pipe by pulling or pushing it therethrough by a wire or a rod, as is done if the device is a chimney-sweep, or by pumping fluid through the pipe, as is done if the device is a cleaning pig.
  • a pipe cleaning device in the form of a pig is disclosed in UK patent application GB 2273543.
  • radially extending flexible scraping fingers are present which are slightly oversized relative to the internal diameter of the pipe so as to make resilient scraping contact with the inner surface of the pipe.
  • a disadvantage of the known device is that when it is moved through the pipe the scraping fingers will deflect such that debris which may be present on, or in pits in, the pipe wall is pressed against the wall by the finger and is therefore trapped and not removed.
  • An object of the present invention is to provide a pipe cleaning device which does not have this disadvantage and which is able to clean the pipewall to a high degree, even if the wall has an irregular surface.
  • the device according to the invention thereto comprises a central body and a plurality of scraper elements extending away from the central body, wherein at least some of the scraper elements have an articulated shape.
  • the device may form part of a cleaning pig which is transported through a pipeline by pumping fluid therethrough, which pig has a tubular central body that carries one or more sets of articulated scraper elements.
  • the device forms part of a cleaning pig it is furthermore preferred that, in order to rotate the pig when it is pumped through a pipe, the outer surface of the front cup is provided with a plurality of helical grooves and the tubular body further carries a series of helical scraper blades.
  • FIG. 1 there is shown a longitudinal section of a pipe 1 through which a cleaning device 2 according to the invention is moved in the direction of the arrows I by pumping fluid through the pipe 1 in the direction of these arrows I.
  • the device 2 comprises a tubular central body 3 on which a rear cup 4, two sets of articulated scraper elements 5 according to the invention, a set of helical scraper vanes 6, a front cup 7 and a set of conventional scraper elements 8 are mounted.
  • the conventional scraper elements 8 and the articulated scraper elements 5 are both slightly oversized with respect to the internal pipe diameter. The resulting deflection of the conventional scraper elements 8 will cause any debris which may be present on, or in pits of, the inner surface of the pipe 1 to be trapped between the tips of the elements 8 and the pipe wall, which reduces the cleaning performance.
  • the length of the articulated scraper elements 5 is selected such that primarily the foot sections 5A thereof are induced to deflect such that the tip sections 5B thereof engage the inner surface of the pipe 1 in a substantially radial direction. As a result of the radial orientation of the tip sections 5B no debris is trapped between these tip sections 5B and the pipe wall and the tip sections 5B will penetrate even into small pits in the pipe wall.
  • the cleaning performance of the device 1 is further enhanced by allowing some of the fluid to bypass the device 1 such that the fluid flushes any debis from the surface of the scraper elements 5 and 8.
  • the outer surface of the front cup 7 is provided with a series of helical grooves 11. During operation of the device 1 some of the fluid will flow through these helical grooves 11 and between the helical scraper blades 6 in the direction of arrows V in a swirling motion, which enhances the cleaning of the pipe wall.
  • FIGS 2 and 3 show the upper part of one set of articulated scraper elements 5 in an expanded position.
  • the elements 5 consist of elongate metal strips which are folded in a U-shape and stabbed through openings 12 in a scraper carrier ring 13 which is welded co-axially around the tubular central body 3 of the device.
  • the openings 12 are drilled in a regular pattern through the ring 13 such that the scraper elements 5, when seen in the direction of the central axis VI of the central body 3 as shown in Fig. 2, are located at regular tangential spacings.
  • the openings 12 are drilled in a slant orientation through the ring 13 such that, when seen in a cross-axial direction as shown in Fig. 3, the foot sections 5A of the scraper elements 5 are oriented at an acute angle of between 70 and 80 degrees relative to the central axis VI and point towards the rear cup 4.
  • the articulated scraper elements 5 are each pre-shaped by bending the element 5 during the manufacturing process of the device 1 and before the device is inserted in a pipeline such that a tip section 5B is defined which is oriented at an angle of between 40 and 50 degrees with respect to the foot section 5A of the element in question and such that the tip section 5B points towards the front cup 7.
  • each scraper elements 5 causes the elements to deflect into the position shown in Fig. 1 when the device is pumped through the pipe 1 such that the tip sections 5B engage the pipe wall in a substantially radial direction.
  • the articulated scraper elements may consist of articulated rods of a plastic material.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP95303784A 1995-06-02 1995-06-02 Rohrreinigungsmolch Withdrawn EP0745436A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95303784A EP0745436A1 (de) 1995-06-02 1995-06-02 Rohrreinigungsmolch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95303784A EP0745436A1 (de) 1995-06-02 1995-06-02 Rohrreinigungsmolch

Publications (1)

Publication Number Publication Date
EP0745436A1 true EP0745436A1 (de) 1996-12-04

Family

ID=8221214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95303784A Withdrawn EP0745436A1 (de) 1995-06-02 1995-06-02 Rohrreinigungsmolch

Country Status (1)

Country Link
EP (1) EP0745436A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6098231A (en) * 1997-06-12 2000-08-08 Pii Limited Pipeline pigs
DE10151553A1 (de) * 2001-10-23 2003-04-30 Motan Materials Handling Gmbh Verfahren und Vorrichtung zur Reinigung von pneumatischen Förder-leitungen mit einem Bypass-Molch
EP2271868A1 (de) * 2008-02-08 2011-01-12 Tdw Delaware, Inc. Wirbelbildungsinhibitorverteilermolch
GB2473595A (en) * 2009-06-09 2011-03-23 Balfour Beatty Plc A pipeline cleaning-servicing pig having a through-bore
CN103691707A (zh) * 2013-12-23 2014-04-02 中国石油大学(华东) 原油管道射流式清管器
CN104858187A (zh) * 2015-04-27 2015-08-26 中国石油大学(华东) 一种用于高含硫集输管道的沉积硫清除器
CN108889735A (zh) * 2018-08-20 2018-11-27 李媛 一种实现水处理净化用排污管内壁自清洁的方法
CN111852398A (zh) * 2019-04-25 2020-10-30 中国石油天然气集团有限公司 组合式套管清洁装置
CN111871987A (zh) * 2020-08-03 2020-11-03 西南石油大学 一种旋转射流清管器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190394A (en) * 1922-03-08 1922-12-21 Robert Carroll Arthur Improvements in plugs for cleaning interiorly tubes of surfacecondensers or the like
US1908339A (en) * 1932-07-30 1933-05-09 Nat Water Main Cleaning Co Pipe cleaning and scraping equipment
US4016620A (en) * 1975-05-22 1977-04-12 Pipeline Dehydrators, Inc. Pipeline cleaning pig
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
WO1991017843A1 (en) * 1990-05-18 1991-11-28 Graham Hubert Smith Tube cleaner
RU1816522C (ru) * 1991-03-26 1993-05-23 Ю.К.Юхнович и В.П.Панченко Устройство дл очистки внутренней поверхности трубопроводов

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190394A (en) * 1922-03-08 1922-12-21 Robert Carroll Arthur Improvements in plugs for cleaning interiorly tubes of surfacecondensers or the like
US1908339A (en) * 1932-07-30 1933-05-09 Nat Water Main Cleaning Co Pipe cleaning and scraping equipment
US4016620A (en) * 1975-05-22 1977-04-12 Pipeline Dehydrators, Inc. Pipeline cleaning pig
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
WO1991017843A1 (en) * 1990-05-18 1991-11-28 Graham Hubert Smith Tube cleaner
RU1816522C (ru) * 1991-03-26 1993-05-23 Ю.К.Юхнович и В.П.Панченко Устройство дл очистки внутренней поверхности трубопроводов

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET PATENTS ABSTRACTS Section PQ Week 9438, 9 November 1994 Derwent World Patents Index; Class P, Page 43, AN 94-309837 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6098231A (en) * 1997-06-12 2000-08-08 Pii Limited Pipeline pigs
AU743853B2 (en) * 1997-06-12 2002-02-07 Pii Limited Pipeline pigs
DE10151553A1 (de) * 2001-10-23 2003-04-30 Motan Materials Handling Gmbh Verfahren und Vorrichtung zur Reinigung von pneumatischen Förder-leitungen mit einem Bypass-Molch
EP1306141A2 (de) 2001-10-23 2003-05-02 MOTAN Materials Handling GmbH Verfahren und Vorrichtung zur Reinigung von pneumatischen Förderleitungen mit einem Bypass-Molch
EP1306141A3 (de) * 2001-10-23 2005-09-21 MOTAN Materials Handling GmbH Verfahren und Vorrichtung zur Reinigung von pneumatischen Förderleitungen mit einem Bypass-Molch
EP2271868A4 (de) * 2008-02-08 2011-11-16 Tdw Delaware Inc Wirbelbildungsinhibitorverteilermolch
JP2011511235A (ja) * 2008-02-08 2011-04-07 ティーディーダブリュー・デラウェア・インコーポレーテッド 渦流式防止剤分散ピグ
EP2271868A1 (de) * 2008-02-08 2011-01-12 Tdw Delaware, Inc. Wirbelbildungsinhibitorverteilermolch
GB2473595A (en) * 2009-06-09 2011-03-23 Balfour Beatty Plc A pipeline cleaning-servicing pig having a through-bore
GB2473595B (en) * 2009-06-09 2013-11-06 Balfour Beatty Plc Live pipe cleaning pig with centre bore
CN103691707A (zh) * 2013-12-23 2014-04-02 中国石油大学(华东) 原油管道射流式清管器
CN104858187A (zh) * 2015-04-27 2015-08-26 中国石油大学(华东) 一种用于高含硫集输管道的沉积硫清除器
CN104858187B (zh) * 2015-04-27 2016-05-25 中国石油大学(华东) 一种用于高含硫集输管道的沉积硫清除器
CN108889735A (zh) * 2018-08-20 2018-11-27 李媛 一种实现水处理净化用排污管内壁自清洁的方法
CN108889735B (zh) * 2018-08-20 2021-09-14 广州市自净环保有限公司 一种实现水处理净化用排污管内壁自清洁的方法
CN111852398A (zh) * 2019-04-25 2020-10-30 中国石油天然气集团有限公司 组合式套管清洁装置
CN111852398B (zh) * 2019-04-25 2024-05-28 中国石油天然气集团有限公司 组合式套管清洁装置
CN111871987A (zh) * 2020-08-03 2020-11-03 西南石油大学 一种旋转射流清管器

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