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WO2018162714A1 - Outil de meulage et de nettoyage pour meuler et nettoyer l'intérieur de tubes et de tuyaux - Google Patents

Outil de meulage et de nettoyage pour meuler et nettoyer l'intérieur de tubes et de tuyaux Download PDF

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Publication number
WO2018162714A1
WO2018162714A1 PCT/EP2018/055911 EP2018055911W WO2018162714A1 WO 2018162714 A1 WO2018162714 A1 WO 2018162714A1 EP 2018055911 W EP2018055911 W EP 2018055911W WO 2018162714 A1 WO2018162714 A1 WO 2018162714A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
grinding
flexible
tool according
distal
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.)
Ceased
Application number
PCT/EP2018/055911
Other languages
English (en)
Inventor
Maria OVSIANNIKOW
Peter OVSIANNIKOW
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.)
Dakki AB
Original Assignee
Dakki AB
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 Dakki AB filed Critical Dakki AB
Priority to EP18710051.6A priority Critical patent/EP3592478B1/fr
Publication of WO2018162714A1 publication Critical patent/WO2018162714A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
    • 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
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/40—Single-purpose machines or devices for grinding tubes internally
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
    • E03F9/002—Cleaning sewer pipes by mechanical means
    • E03F9/005—Apparatus for simultaneously pushing and rotating a cleaning device carried by the leading end of a cable or an assembly of rods

Definitions

  • the invention relates generally to the field of maintenance and/or treatment of pipes, such as tubing and pipes in family houses, apartment blocks and office buildings or in industrial or off-shore applications such as process industry, ships and the oil/gas industry.
  • the invention in particular relates to a tool for grinding and cleaning the inside of pipes by utilising the centrifugal force due to the rotation of the tool.
  • Pipes and tubing systems in various types of constructions such as industrial buildings, dwelling houses, single-family houses as well as apartment blocks, and tubing systems in ships and in various industrial applications will need to be maintained by treating the inner side of the tubing, e.g.
  • a thorough cleaning could be performed once in a while, e.g. every 5 years, in order to maintain the tubing in a good condition.
  • the cause may for example be deposits or accumulation of various types of substances forming insoluble lumps on the tube walls, corrosion, or damp-related damages.
  • a device is presented that is intended as a tool for grinding and cleaning the inside of pipes, comprising a distal part to which a flexible shaft, such as a wire, is attachable, for example with a screw thread and clamping coupling, and a proximal part adapted to guide the shaft through the center of the proximal part, at least two elongated and flexible linking members connecting the distal part with the proximal part, grinding elements attached to or being an integrated part of said flexible linking members.
  • the tool is provided with a resilient spacer member keeping the distal and proximal parts apart.
  • the elongated and flexible linking members are preferably constrained to move in any considerable amount in the azimuthal direction and could comprise chains of links, suitably of metal, preferably of steel.
  • the resilient spacer member is a spiral spring, but could for example also be rubber or any other elastic material meeting the desired requirements.
  • Said distal part and proximal part respectively, would preferably have shapes for facilitating easy translation through the pipe.
  • the characteristics of the tool stem from azimuthal stability and force balance between centrifugal and longitudinal forces.
  • the tool is stable during many modes of operation and thus does not endanger the pipe structure; it is self-adjusting in a way that removes the requirement to fine adjust the tool manually; and it can be manufactured in a highly automated process with a minimal input of manual labour.
  • the grinding elements comprise hard material, suitably in the form of irregularly shaped bodies with protruding pieces of hard, abrasive material, although other shapes and materials are possible and within the inventive concept.
  • the resilient spacer member suitably in the form of a spiral spring, will counterbalance the centrifugal force and will also balance the movement of the grinding links against the pipe wall.
  • the spring will enable a smooth start-up that prevents strikes against the pipe wall. This is very advantageous during start-up and during the grinding operation and will significantly reduce the risk for damage.
  • the spring enables a smooth control of the geometry of the grinding links during operation, i.e. the desired grinding diameter for the grinding operation. This grinding diameter can easily be controlled by adjusting the speed of rotation of the flexible shaft. Increasing the rotation will bring about a larger grinding diameter and vice versa.
  • Fig. 1 is a cross-sectional view of a tool
  • Fig. 2 is a view from above of one embodiment of the tool
  • Fig. 3 is a schematic illustration of the tool in a relaxed, non-rotating state
  • Fig. 4 is a schematic illustration of the tool while rotating
  • Fig. 5a is an illustration showing grinding elements on a chain
  • Fig. 5b illustrates another embodiment of a grinding element
  • Fig. 6 illustrates distal and proximal parts of the tool
  • Fig. 7 illustrates a clamping member for a flexible shaft.
  • the tool disclosed herein is usable for internal cleaning, reaming, and grinding pipe systems made of cast iron, concrete or plastic materials.
  • the tool is adapted for pipe systems consisting of small (typically about 30 mm to 150 mm in diameter) and composite dimensions having diversions and and/or connecting pipes. Examples of such system can be found in e.g. buildings, ships, industrial and off-shore operations.
  • the purpose can i.a. be to clean the pipe from e.g. deposits or slag products or to prepare the pipe for maintenance such as relining or coating, which will prolong the technical lifetime of the pipe system and improve its function.
  • Figure 1 is a view of a tool 100 in cross-section.
  • the tool 100 comprises a distal part 101, in the form of a first essentially dome shaped member (front member), to which a flexible shaft 102 is attached.
  • a proximal part in the form of a second essentially dome shaped member 103, referred to as a sliding member (rear member), and adapted to guide the flexible shaft 102 through its center, i.e. the shaft 102 slides in the sliding member 103.
  • the flexible shaft 102 is suitably anchored in the front cone 101, preferably by clamping. To this end, suitably there is provided a clamping sleeve 102'.
  • the shaft 102 is rigidly mounted to the flexible shaft 102 by clamping, i.e.
  • the sleeve 102' has an external thread on a longitudinally protruding portion 102" mating with a corresponding inner thread (not visible in the figure) in the front member 101.
  • a resilient elongated member 106 is provided between the front and rear members 101, 103, respectively.
  • At least two elongated and flexible linking members 104 also referred to as grinding links, connecting the distal part 101 with the proximal part 103.
  • These linking members have been left out from Fig. 1 for clarity, but can be seen in Fig. 2.
  • Grinding elements 105 are attached to or are an integrated part of said flexible linking members. The grinding elements can preferably be crushed hard metal soldered onto the links. Alternative embodiments are possible, one being discussed below.
  • a resilient spacer member 106 keeps the distal and proximal parts apart.
  • the spacer member is suitably a spiral spring, although other types are possible, such as rubber or any other elastic material that meets the requirements.
  • a guiding tip 107 comprises an essentially spherical or conical element attached to a flexible shaft, which is provided at its respective distal and proximal ends with quick fittings, suitably threaded, for attaching the spherical element at the distal end, and for attaching the guiding tip to the front cone 101, respectively.
  • auxiliary item is a stabilizer brush, attachable to the front cone 101, and the function of which is to support the spring 106 and to stabilize the rotation of the tool when coarse irregularities on the inner wall of a tube are encountered.
  • a supplemental brush can be located behind the rear member 103 and will be idle.
  • Still another auxiliary item is a milling piece. This milling piece is connected to the front cone 101 and is used to remove obstacles blocking the path inside a tube.
  • Figure 2 illustrates the tool generally designated with reference numeral 100.
  • grinding elements 105 are shown in Fig. 2. These grinding elements comprise pieces of hard material (suitably crushed hard metal) soldered onto the linking members.
  • the flexible linking members 104 can for example comprise chains of metal links or sections of flexible wire. Said elongated and flexible linking members 104 are constrained to move in any considerable amount in the azimuthal direction, causing the tool during rotation to become azimuthally stable against the potentially destabilising effect of friction forces on the grinding elements 105 against the inside of the pipe as well as other dynamic forces.
  • the linking members 104 should be symmetrically distributed circumferentially, i.e. when two linking members are provided they should be arranged 180° apart, three members should be spaced 120° apart, and four members 90° apart.
  • Figure 3 schematically illustrates the tool 100 in a relaxed state, i.e. when it is not rotating.
  • the resilient spacer member 106 stretches the tool to its maximum length and it obtains its minimum cross section. This enables the tool to be easily translated longitudinally through a pipe by pushing or pulling it via the flexible shaft 102. Translation of the tool longitudinally through the pipe can be done either manually or with the help of a pusher/pulling motor attached to the other end of the flexible shaft.
  • Figure 4 schematically illustrates the tool when it is rotated.
  • the linking members 104 are pushed radially outwards due to centrifugal forces, causing the grinding elements 105 to grind against the inside of the pipe; and the resilient space member 106 to be actuated, for example if it 106 is a spiral spring, it is further compressed.
  • the proximal part 103 will move along the flexible shaft 102 in the longitudinal direction towards the distal part 101.
  • Centrifugal forces acting on the linking members 104 and the actuation force acting on the actuated resilient space member 106 thus counter each other resulting in a dynamic force balance for each rotational speed.
  • the resilient spacer member 106 for example a spiral spring, is used to keep the distal and proximal parts apart.
  • the resilient spacer member 106 is placed in between the distal and proximal parts, with the flexible shaft 102 coaxially passing through it.
  • the resilient spacer member 106 is actuated slightly so that it pushes the distal 101 and proximal 103 parts away from each other, with the distal end of 106 leaning against the a surface 10 of the distal part 101, and the proximal end of 106 leaning against a flat surface 103' of the distal part 103.
  • the resilient spacer member 106 it is slightly compressed when put into place between the distal 101 and proximal 103 parts, with the flexible shaft 102 passing through it 106, with its 106 distal end leaning against the flat surface of the distal part 101, and its 106 proximal end leaning against the flat surface 103' of the proximal part 103, and thus the spring force press said parts away from each other until the flexible linking members 104 are stretched, in which state the whole assembly is in static force equilibrium.
  • the other end of the flexible shaft 102 is connected to a motor.
  • the motor rotates the tool by means of the flexible shaft 102, the centrifugal force forces the grinding links towards the pipe wall.
  • the spring design will stabilize this centrifugal force such that the force with which the grinding links approach the wall is controlled by the rotational speed and the spring constant.
  • a selection of different springs e.g three, is provided which enable adaption to the nedds and the state of the pipes so as to achieve a smooth abutment against the pipe wall.
  • the geometric shape of the links will vary from an ellipse at low rpm to a spherical shape at full speed (1200 rpm).
  • the spring will become compressed and when the rpm is lowered the links will again be extended and become fully extended at zero rotation.
  • Figure 5a illustrates one embodiment of usable grinding elements 105. They comprise pieces 106 of hard metal soldered onto the individual links 104' on the linking members 104.
  • the pieces can also be made from e.g. cemented carbide or another hard metal, diamond, cubic boron nitride, or the equivalent that is suitable for grinding.
  • FIG. 5b illustrates another embodiment of the grinding elements 105'.
  • the top surfaces 501 of the grinding elements 105' have the purpose of providing a grinding action against the inside wall of the pipe when the tool is being rotated.
  • the top surfaces 501 are provided with several protrusions 502 at sharp angles in a repetitive pattern in order to provide such grinding.
  • the grinding elements 105' have features on them 503 that are intended for assembly of the grinding elements 105 to the flexible linking members 104.
  • the grinding elements 105' can either be attached to the flexible linking members 104 or be an integrated part of said flexible linking members.
  • Said features 503 can be for example drilled, pressed or casted holes that are suitable for connecting each of the grinding elements 105 to the flexible linking members 104.
  • Either the whole of the grinding elements 105' or the top fraction thereof containing the top surface 501 which is intended for grinding, are made of a hard material, e.g. cemented carbide or another hard metal, diamond, cubic boron nitride, or the equivalent that is suitable for grinding.
  • each of the grinding elements 105, 105' is raised in relation to the flexible linking members 104, in a way such that there is a margin distance between the outermost surface of the flexible devices 104 and the grinding surfaces 501.
  • this margin is at least 1.2, more preferred 1.5, measured as the ratio of the distance from the center longitudinal axis of the tool to the grinding surface, when the tool is at rest, and the distance from the center longitudinal axis of the tool to the outermost surface of the flexible devices.
  • the margin between the outermost surface of the flexible devices 104 and the grinding surfaces 501 secures that the wear on the flexible devices 104 is minimal and most of the wear is on the top surfaces 501 of the grinding elements 105, 105'.
  • Fig. 6a shows the proximal member (rear part) 103 in cross-section. It is essentially dome shaped having a central through hole 601 for accommodating a shaft 102.
  • the proximal part 103 also comprises a recess 602 for receiving the resilient spacer member to keep it in place within the rear part 103, and a spring locating member in the form of a cylindrical sleeve 603 inside said recess 602 around which the spacer member 102 is positioned.
  • Fig. 6b shows the distal member (front part) 101. It is also essentially dome shaped and has a recess 604 for accommodating the distal end of the resilient member. It also comprises a threaded through hole 605 for receiving a clamping means for the flexible shaft, to secure said clamping means in a threaded engagement.
  • the clamping means 701 is shown in Fig. 7a. It comprises a sleeve portion 702 into which the distal end of the flexible shaft is inserted. When the shaft end is in place a tool is used to deform the sleeve 702 so as to clamp the shaft end in the sleeve. This can be seen in Fig. 1 indicated as an indentation IND.
  • the clamping means is also provided with a threaded portion 703 extending distally in the longitudinal direction.
  • a guiding means 704 for the resilient member 106 such as a spring.
  • This guiding means 704 has a similar sleeve 705 to the sleeve in the proximal part adapted for being enclosed by a distal part of the resilient member.
  • the guiding means 704 also has a threaded hole 706 in which the threaded protruding part 703 of the clamping sleeve is insertable so as to be secured together with the guiding means. This is indicated by an arrow INS in Fig 7.
  • This combination of clamping means and guiding means can be placed in the recess for
  • a guiding tip 707 has been screwed onto the protruding part.
  • Fig. 7c shows such a guiding tip 707 that can be attached in the manner shown in Fig. 1.
  • the dome shaped front member 101 has been left out but would be positioned in the space indicated between the vertical broken lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Cleaning In General (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

La présente invention concerne un outil (100) pour meuler et nettoyer l'intérieur de tuyaux en utilisant la force centrifuge générée par la rotation de l'outil. L'outil comporte plusieurs éléments de meulage (105), constitués d'un matériau dur, par exemple en carbure cémenté, qui sont poussés vers l'intérieur du tuyau par une force centrifuge lorsque l'outil est mis en rotation. L'outil est fixé à un arbre flexible rotatif (102), fournissant un mouvement de rotation à l'outil. L'outil comprend une partie distale (101), sur laquelle est fixé un arbre flexible (102) ; une partie proximale (103) conçue pour guider l'arbre flexible à travers son centre ; au moins deux éléments de liaison allongés et flexibles (104) raccordant la partie distale (101) à la partie proximale (103) ; des éléments de meulage (105) fixés auxdits éléments de liaison flexibles ou étant intégrés à ceux-ci ; et un élément d'espacement élastique (106) qui maintient les parties distale et proximale séparées l'une de l'autre.
PCT/EP2018/055911 2017-03-10 2018-03-09 Outil de meulage et de nettoyage pour meuler et nettoyer l'intérieur de tubes et de tuyaux Ceased WO2018162714A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18710051.6A EP3592478B1 (fr) 2017-03-10 2018-03-09 Outil de meulage et de nettoyage pour meuler et nettoyer l'intérieur de tubes et de tuyaux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1750276A SE541684C2 (en) 2017-03-10 2017-03-10 Tool for grinding and cleaning the inside of tubing and pipes
SE1750276-6 2017-03-10

Publications (1)

Publication Number Publication Date
WO2018162714A1 true WO2018162714A1 (fr) 2018-09-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/055911 Ceased WO2018162714A1 (fr) 2017-03-10 2018-03-09 Outil de meulage et de nettoyage pour meuler et nettoyer l'intérieur de tubes et de tuyaux

Country Status (3)

Country Link
EP (1) EP3592478B1 (fr)
SE (1) SE541684C2 (fr)
WO (1) WO2018162714A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019197167A1 (fr) * 2018-04-09 2019-10-17 Picote Solutions Inc. Dispositif de nettoyage adaptatif
EP3617414A1 (fr) * 2018-09-03 2020-03-04 Boldan Oy Foret à lame de nettoyage de tuyaux ou de dispositif d'ouverture
CN117600938A (zh) * 2023-12-28 2024-02-27 太原北方重工机械有限公司 一种可自动避障的管坯内表面打磨小车
WO2025106506A1 (fr) * 2023-11-13 2025-05-22 Worcester Polytechnic Institute Polissage par broche flexible

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116111509B (zh) * 2023-04-11 2023-06-27 河南航鸿建设发展有限公司 一种建筑电气施工穿线装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018124A (en) * 1933-08-30 1935-10-22 Harry J Forster Tube scraper
WO1994008728A1 (fr) 1992-10-09 1994-04-28 Bror Eklund Appareil utilise pour enduire la face interne de canalisations d'un materiau protecteur
DE202010003125U1 (de) * 2010-03-03 2010-06-10 Haeger, Bernd Jürgen Rohrreinigungswerkzeug für ein Rohrreinigungsspiralsystem
US20160121377A1 (en) 2014-10-30 2016-05-05 Tommi Virtanen Cleaning device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018124A (en) * 1933-08-30 1935-10-22 Harry J Forster Tube scraper
WO1994008728A1 (fr) 1992-10-09 1994-04-28 Bror Eklund Appareil utilise pour enduire la face interne de canalisations d'un materiau protecteur
DE202010003125U1 (de) * 2010-03-03 2010-06-10 Haeger, Bernd Jürgen Rohrreinigungswerkzeug für ein Rohrreinigungsspiralsystem
US20160121377A1 (en) 2014-10-30 2016-05-05 Tommi Virtanen Cleaning device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019197167A1 (fr) * 2018-04-09 2019-10-17 Picote Solutions Inc. Dispositif de nettoyage adaptatif
US11040382B2 (en) 2018-04-09 2021-06-22 Picote Solutions Inc. Adaptive cleaning device
EP3617414A1 (fr) * 2018-09-03 2020-03-04 Boldan Oy Foret à lame de nettoyage de tuyaux ou de dispositif d'ouverture
WO2025106506A1 (fr) * 2023-11-13 2025-05-22 Worcester Polytechnic Institute Polissage par broche flexible
CN117600938A (zh) * 2023-12-28 2024-02-27 太原北方重工机械有限公司 一种可自动避障的管坯内表面打磨小车

Also Published As

Publication number Publication date
SE541684C2 (en) 2019-11-26
EP3592478A1 (fr) 2020-01-15
EP3592478B1 (fr) 2021-07-07
SE1750276A1 (sv) 2018-09-11

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