WO2005007308A1 - Appareil et procede pour nettoyer l'interieur de tuyaux et de tubes - Google Patents

Appareil et procede pour nettoyer l'interieur de tuyaux et de tubes Download PDF

Info

Publication number
WO2005007308A1
WO2005007308A1 PCT/NO2004/000219 NO2004000219W WO2005007308A1 WO 2005007308 A1 WO2005007308 A1 WO 2005007308A1 NO 2004000219 W NO2004000219 W NO 2004000219W WO 2005007308 A1 WO2005007308 A1 WO 2005007308A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe pig
tube
pipe
pig
end portion
Prior art date
Application number
PCT/NO2004/000219
Other languages
English (en)
Norwegian (no)
Inventor
Rolf G. Jemne
Original Assignee
Jemne Rolf G
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 Jemne Rolf G filed Critical Jemne Rolf G
Publication of WO2005007308A1 publication Critical patent/WO2005007308A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
    • 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
    • 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
    • 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

Definitions

  • the invention relates to an apparatus for cleaning off deposits internally in pipes and tubes by the use of a pipe scraper or "pig", which is shot through the pipe at high velocity.
  • the invention also relates to a method of use of the invention.
  • the purpose of the invention is to provide an apparatus which enables a quick, efficient and safe internal cleaning of tubulars, for example in a heat exchanger, by the use of a pipe scraper which is shot through a tube at high velocity by means of a fluid, preferably so that cavitation and turbulence are created between the pipe scraper and the pipe wall, sufficient to debond deposits on the tube's internal surface.
  • the disadvantages relate primarily to the relatively time-consuming operation and to the equipment required being relatively complicated, where there may be a requirement for both gas and chemicals to be added in addition to a relatively extensive control system. Additionally, the use of chemicals represents an environmental problem.
  • the pipe pigs are driven sealed against the pipe wall, which is achieved because the pipe pigs are made of a soft compressible material with a diameter larger than the internal area of the pipe.
  • By applying water at low pressure to one side of the pipe pigs they are moved through the pipe at a velocity of 0.3 to 1 m/s, whilst scraping, brushing, grinding and/or polishing the pipe.
  • the patents US 4,720,884 and US 5.384.929 disclose pipe pigs equipped with brushing and scraping devices which are disposed as helical axial elevations.
  • the main disadvantages are related to the fact that the above- mentioned pipe pigs are travelling at relatively low velocity. Due to the softness of the material, there are, in addition, essential limitations to the pressure that may be applied to pigs to obtain propulsion.
  • the pigs are essentially made for cleaning larger pipe lines having contaminants like paraffin, wax and similar, and are not very suitable for removing contaminants in, for example, heat exchangers where the contaminants are mainly hard deposits like scale, calcium carbonate, silicon carbonate, lye and similar.
  • the object of the invention is to remedy the disadvantages of the prior art.
  • the present invention includes a specially designed pipe scraper for cleaning of tubes, for example, but not limited to, tubes in heat exchangers.
  • a specially designed pipe scraper for cleaning of tubes, for example, but not limited to, tubes in heat exchangers.
  • the pipe scraper is carried through the tube at high velocity.
  • the pipe scraper is provided with at least one, but preferably multiple helical axial grooves or rails placed on the external circumferential surface of the pipe scraper, facing the internal surface of the tube wall to be cleaned.
  • the pipe scraper has preferably an outside diameter which is smaller than the tube's internal diameter.
  • the fluid When the pig is "shot" through the tube, at very high velocity, several hundred metres per second, by means of fluid, for example water, the fluid will, among other things, be forced through the axial helical grooves and cause a high rotational velocity of the pipe scraper. Together with the high axial velocity the high rotational velocity will create turbulence and cavitation to such a magnitude against the internal contamination of the tube that the contamination will debond from the tube wall.
  • fluid for example water
  • a sufficient propulsive and rotational velocity of the pipe pig is provided by the generation of a dynamic fluid pressure blow against one end portion of the pipe pig after it has been inserted into the tube which is to be cleaned.
  • the fluid When the pipe pig is provided with at least one, but preferably multiple, axial helical grooves, the fluid will generate fast rotation of the pig together with a high axial velocity. As the pig rotates, the at least one groove or elevation will create cavitation and turbulence causing debonding of the contamination.
  • the pressurised fluid When driving a pipe pig through a totally or almost totally blocked tube, the pressurised fluid preferentially applied in blows against an end surface of the pig, will cause advancement of the pig. Due to the differential pressure between the tube in front of and behind the pig, the fluid which may be water, for example, will be forced between the pig and the contamination and between the contamination and the tube wall, causing contamination to debond from the tube wall .
  • Figure 1 shows a diagrammatic overview of the fluid supply arrangement according to the invention.
  • Figure 2 shows a view of an arrangement according to the invention, in which a nozzle shaped like the frustum of a cone is placed in an essentially sealed connection with a tube which is to be cleaned, and a pipe pig according to the invention has been inserted into the tube.
  • Figure 3 shows a pipe pig according to the invention, in which the pipe pig is formed by a solid, cylindrical element which is provided with twelve u-shaped axial, helical recesses in its outer surface.
  • Figure 4 shows a vertical projection of the pipe pig of Figure 3, seen from one of the end surfaces.
  • Figure 5 shows a section A-A of the pipe pig of Figure 4.
  • Figure 6 shows a pipe pig according to the invention, in which the pipe pig is formed by a cylindrical element which is provided, in a portion, with a bore and, on the external surface, is provided with twelve essentially rectangularly shaped axial, helical recesses.
  • Figure 7 shows a vertical projection of the pipe pig of Figure 6 seen from the end surface that is furnished with the bore.
  • Figure 8 shows a section C-C of the pipe pig of Figure 7.
  • the reference number 1 denotes the tube- cleaning device according to the invention comprising a valve arrangement 3, a valve control unit 10, a nozzle device 20 which is brought to bear in an essentially sealing manner against one end portion of a tube 30 which is to be cleaned, and a pipe pig 40 which is carried through said tube 30 by means of differential pressure between the two end surfaces of the pipe pig 40.
  • a pipe pig 40 which is carried through said tube 30 by means of differential pressure between the two end surfaces of the pipe pig 40.
  • FIG. 1 shows a diagrammatic overview of the valve arrangement 3 which is provided with fluid from a high- pressure pump (not shown) of a type known in itself, through a supply line 2, where the valve arrangement 3 is formed by a first fast-acting valve 4 and a second fast-acting valve 6, both of a type known in itself, which are controlled by two valve control units 12, 14, of a type known in itself, the valve control unit 12 controlling said first fast-acting valve 4 and the valve control unit 14 controlling the second fast- acting valve 6.
  • the valve control units 12, 14 can be, for example, but not limited to, pneumatically or electrically controlled, electricity or pneumatics being supplied to the valve control unit by a control supply line 16.
  • a fluid line 8 extends to at least one nozzle 20 and to a pressure relief line 5.
  • an accumulator 7 is installed on the supply line 2 between the high-pressure pump and the valve 4.
  • Figure 2 shows a nozzle 20 shaped like the frustum of a cone which is connected at its one end portion to a fluid line 8 which connects the nozzle 20 to the valve arrangement 3 ( Figure 1) , and which is inserted by its other end portion into the pipe 30 which is to be cleaned of internal contamination 32.
  • the end portion of the tube 30 is placed in a hole of a tube sheet 31
  • a pipe pig 40 according to the invention is placed inside the tube adjacent to the outlet portion of the nozzle 20.
  • the nozzle 20 is kept in the desired position by means of a counter-device 50, and is moved in the axial direction of the tube 30 by means of a hydraulic device 55 of a type known in itself, associated with the counter-arrangement 50.
  • Figures 3 to 8 show two different pipe pigs 40 formed by a pig body 42 provided with axial, helical grooves 44.
  • the pipe pig 40 is formed by a solid cylindrically shaped, essentially incompressible material which is provided with u-shaped grooves 44.
  • the pipe pig 40 is formed by a cylindrically shaped, essentially incompressible material which is provided externally with essentially rectangularly shaped grooves and which is provided, from one end surface, with a bore 46 in a portion of the pig body 42.
  • the bore 46 does not extend through the pig body 42.
  • the bore 46 is shown as a centre bore.
  • the pipe pig 40 is shown with an essentially square transition between the end faces and the cylinder surface which is furnished with grooves. However, one or both transitions may be inclined or chamfered (not shown) .
  • the pipe pig is formed by a polygonal body, where the edges between the pipe pig's surfaces facing the tube's internal surface form a sloping angle relative to the axial direction of the body (and the pipe) .
  • the edges will define inclined flow channels which are formed between the surfaces and the tube's internal surface, which channels will cause rotation of the pipe pig as a mass of fluid flows through the channels.
  • a method of use of the pipe-cleaning device includes:
  • a pipe pig 40 is adapted to the range of use with respect to the metallurgical integrity, pressure rating and the configuration of the passage of the tube 30 to be cleaned.
  • the pipe pig 40 is preferably produced of a material which is softer than the tube 30 and the pipe pig's 40 outside diameter is preferably under-dimensioned relative to the internal diameter of the tube 30.
  • the nozzle 20 is placed, essentially in a sealing position, in the end portion of the tube 30, where the pipe pig 40 is placed and held in position by a counter-device 50, 55,
  • the supply line 2 is connected to a high-pressure pump (not shown) and the pressure is adjusted to the capacity of the tube, for example to 50-75 % of the yield of the pipe material
  • the fluid line 8 in fluid communication with the fast- acting valves 4, 6 is connected to the nozzle 20 associated with the tube 30, and an outlet portion of the pressure relief line 9 in fluid communication with the fast- acting valve 6 is routed to a desired discharge point, for example a water reservoir,
  • the fluid line 8 and tube 30 up to the pipe pig 40 is filled with fluid, for example, but not limited to, water,
  • valve 6 is opened by means of the valve control unit 14 and the fluid in the fluid line 8 up to the pipe pig 40 is pressure-relieved
  • valve 6 is closed by means of the valve control unit 14,
  • the pipe pig 40 in accordance with the invention is best suited for removing a small to moderate thickness of contamination deposits in the tube 30. For typical tubes in for instance a heat exchanger this can be in the order of up to approximately 1.5 mm.
  • the fluid supplied as under item 1) above will pass through the axial helical grooves 44 and cause a high rotational velocity of the pig, which in addition to a high axial velocity will create turbulence and cavitation to such a degree against the contamination on the inside of the pipe wall that the contamination will be debonded from the tube wall.
  • the pipe pig 40 according to the invention it is thus the turbulence and cavitation which bring about the cleaning of the tube 30, and the pipe pig 40 is thus dependent on receiving fluid pressure blows generated by the pipe-cleaning device according to the present invention.
  • a pipe pig of a type known in itself can be utilised to remove the contamination from the tube's 30 inside.
  • the pipe pig known in itself is supplied with pressurized fluid "in blows “against its one end surface according to the method described in the items a) - m) above, and a "hammer effect" is achieved so that the pipe pig is driven through the tube. Because of the differential pressure between the pipe in front of and behind the pig the fluid, which could for example be water, will be forced between the pig and the contamination and between the contamination and tube wall, which causes debonding of contamination from the tube wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)

Abstract

L'invention concerne un piston racleur (40) servant à éliminer les dépôts à l'intérieur d'un tube (30). Ce piston racleur (40) présente au moins une rainure hélicoïdale axiale (44) ménagée dans sa surface faisant face à la surface intérieure du tube (30). Ledit piston racleur (40) est propulsé au moyen d'un fluide haute pression à travers le tube à nettoyer, ce fluide étant distribué à grande vitesse au moyen d'un système de soupapes.
PCT/NO2004/000219 2003-07-17 2004-07-15 Appareil et procede pour nettoyer l'interieur de tuyaux et de tubes WO2005007308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20033233A NO320030B1 (no) 2003-07-17 2003-07-17 Rorskraper for innvendig rengjoring av ror samt fremgangsmate ved bruk av samme.
NO20033233 2003-07-17

Publications (1)

Publication Number Publication Date
WO2005007308A1 true WO2005007308A1 (fr) 2005-01-27

Family

ID=27800811

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2004/000219 WO2005007308A1 (fr) 2003-07-17 2004-07-15 Appareil et procede pour nettoyer l'interieur de tuyaux et de tubes

Country Status (2)

Country Link
NO (1) NO320030B1 (fr)
WO (1) WO2005007308A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080302388A1 (en) * 2007-06-08 2008-12-11 Tubemaster, Inc. Method of cleaning tubes
CN103611712A (zh) * 2013-10-24 2014-03-05 宁波管通机械有限公司 一种小口径管道内壁除锈清理方法及其装置
EP2865457A1 (fr) * 2013-10-25 2015-04-29 Fras Technology AS Racleur pour pipeline
US20160346814A1 (en) * 2015-06-01 2016-12-01 Brian Good Conduit Cleaning Article
CN107138913A (zh) * 2017-05-11 2017-09-08 马富君 一种钢质管道内壁焊渣焊瘤的去除方法
CN112620512A (zh) * 2020-11-30 2021-04-09 南京宝色股份公司 一种液压胀管器断后取出装置以及取出方法
DE102020107315A1 (de) 2020-03-17 2021-09-23 Martin Lembke Verfahren zum Reinigen des Innenbereichs von Rohren von Lüftungs- und Klimaanlagen
CN115625265A (zh) * 2022-10-28 2023-01-20 江苏东方瑞吉能源装备有限公司 一种机械胀管器断在换热管内部的取出装置及其取出方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716611A (en) * 1983-03-11 1988-01-05 Lacress Nominees Pty., Ltd. Apparatus for cleaning pipes, tubes, and the like by launching pigs
US4898197A (en) * 1983-03-11 1990-02-06 Lacress Nominees Pty. Ltd. Cleaning of tubes using projectiles
US8645544B2 (en) * 2010-10-15 2014-02-04 Cox Communications, Inc. Cross product/service management

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716611A (en) * 1983-03-11 1988-01-05 Lacress Nominees Pty., Ltd. Apparatus for cleaning pipes, tubes, and the like by launching pigs
US4898197A (en) * 1983-03-11 1990-02-06 Lacress Nominees Pty. Ltd. Cleaning of tubes using projectiles
US8645544B2 (en) * 2010-10-15 2014-02-04 Cox Communications, Inc. Cross product/service management

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9034110B2 (en) 2007-06-08 2015-05-19 Extundo Incorporated Method of cleaning tubes
WO2008154284A2 (fr) * 2007-06-08 2008-12-18 Tubemaster, Inc Procédé de nettoyage de tubes
WO2008154284A3 (fr) * 2007-06-08 2009-02-19 Tubemaster Inc Procédé de nettoyage de tubes
CN101680728B (zh) * 2007-06-08 2012-02-29 管器冠群公司 清洁管子的方法
KR101194526B1 (ko) 2007-06-08 2012-10-24 투베마스터 인코포레이티드 튜브를 세정하는 방법
US20080302388A1 (en) * 2007-06-08 2008-12-11 Tubemaster, Inc. Method of cleaning tubes
CN103611712A (zh) * 2013-10-24 2014-03-05 宁波管通机械有限公司 一种小口径管道内壁除锈清理方法及其装置
EP2865457A1 (fr) * 2013-10-25 2015-04-29 Fras Technology AS Racleur pour pipeline
US20160346814A1 (en) * 2015-06-01 2016-12-01 Brian Good Conduit Cleaning Article
US10807129B2 (en) * 2015-06-01 2020-10-20 Brian Good Conduit cleaning article
CN107138913A (zh) * 2017-05-11 2017-09-08 马富君 一种钢质管道内壁焊渣焊瘤的去除方法
DE102020107315A1 (de) 2020-03-17 2021-09-23 Martin Lembke Verfahren zum Reinigen des Innenbereichs von Rohren von Lüftungs- und Klimaanlagen
DE102020107315B4 (de) 2020-03-17 2021-12-30 Martin Lembke Verfahren zum Reinigen des Innenbereichs von Rohren von Lüftungs- und Klimaanlagen
CN112620512A (zh) * 2020-11-30 2021-04-09 南京宝色股份公司 一种液压胀管器断后取出装置以及取出方法
CN115625265A (zh) * 2022-10-28 2023-01-20 江苏东方瑞吉能源装备有限公司 一种机械胀管器断在换热管内部的取出装置及其取出方法

Also Published As

Publication number Publication date
NO20033233D0 (no) 2003-07-17
NO320030B1 (no) 2005-10-10
NO20033233L (no) 2005-01-18

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