EP0120355A2 - Outil pour le nettoyage à distance des extrémités des tubes d'un faisceau tubulaire - Google Patents

Outil pour le nettoyage à distance des extrémités des tubes d'un faisceau tubulaire Download PDF

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Publication number
EP0120355A2
EP0120355A2 EP84102394A EP84102394A EP0120355A2 EP 0120355 A2 EP0120355 A2 EP 0120355A2 EP 84102394 A EP84102394 A EP 84102394A EP 84102394 A EP84102394 A EP 84102394A EP 0120355 A2 EP0120355 A2 EP 0120355A2
Authority
EP
European Patent Office
Prior art keywords
hollow shaft
lever
rod
tool
guide tip
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.)
Granted
Application number
EP84102394A
Other languages
German (de)
English (en)
Other versions
EP0120355A3 (en
EP0120355B1 (fr
Inventor
Manfred Häberlein
Heribert Weigl
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.)
Kraftwerk Union AG
Original Assignee
Kraftwerk Union 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 Kraftwerk Union AG filed Critical Kraftwerk Union AG
Publication of EP0120355A2 publication Critical patent/EP0120355A2/fr
Publication of EP0120355A3 publication Critical patent/EP0120355A3/de
Application granted granted Critical
Publication of EP0120355B1 publication Critical patent/EP0120355B1/fr
Expired legal-status Critical Current

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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
    • F28G3/00—Rotary appliances
    • F28G3/04—Rotary appliances having brushes
    • 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
    • F28G3/00—Rotary appliances

Definitions

  • the invention relates to a tool for remote-controlled cleaning of the tube ends of a tube bundle in a heat exchanger with a tube plate assigned to the tube bundle, on which the tool is centered.
  • the known tool is used to repair steam generators in a nuclear power plant when the pipes are particularly attacked by corrosion and are to be at least partially replaced.
  • the invention also deals with such repairs. However, it is based on the task, not dealt with by the known person, of being able to clean the outside of the pipe ends.
  • the tool according to the invention is designed so that a hollow shaft with a smaller diameter than the tubes is provided, which is closed at its free end with a conical guide tip, that the hollow shaft comprises a slot adjacent to the guide tip that in the Slit a two-armed lever is pivotally mounted on which the guide tip the opposite end is provided with a friction attachment, which is pulled by a spring against a stop into the interior of the hollow shaft, that on the side of the lever facing away from the guide tip there is arranged a rod which is displaceable in the longitudinal direction of the hollow shaft and that the rod has a longitudinal section through the Axis of the rod angled tip, which is laterally offset from the pivot axis of the lever, engages in a recess on the end of the lever facing away from the guide tip.
  • the hollow shaft is passed through the bores of the tube sheet so that it can engage with its guide tip in the tube end above the tube sheet.
  • the two-armed lever can be pivoted with the aid of the rod, so that the end provided with the friction attachment projects beyond the circumference of the tube end.
  • the friction attachment can then rest on the outside of the pipe end. A rotation of the hollow shaft then results in the desired cleaning of the outside of the pipe end, which is advantageous for a subsequent repair, in particular for a connection to a pipe section to be welded on.
  • the recess provided for pivoting the two-armed lever, which cooperates with the rod, is advantageously designed such that it forms an angle in longitudinal section through the hollow shaft which is greater than the angle at the tip of the rod.
  • the size of the lateral deflection of the lever can thus be controlled, as will be explained in more detail later using an exemplary embodiment.
  • a Another control option results from the fact that the longitudinal movement of the rod is limited by a stop on the hollow shaft.
  • the friction attachment is advantageously a steel brush. But you can also use file-like tools for cleaning or brushes with which, for example, a chemical treatment for removal. of corrosion layers.
  • FIG. 1 shows a section through a lower part of a steam generator for pressurized water reactors, J while FIGS. 2 and 3 show two different positions of the new tool and FIG. 4 is a view rotated by 90 ° of the tool shown in FIG. 3 .
  • the steam generator to be processed is designated as a whole by 1. It is a U-tube steam generator, the bundle of parallel tubes 2 forms two legs 3 and 4, which end in the tube sheet 5 so that one leg 3 of one half 6 of a primary chamber delimited by the bottom 7 and the other leg 4 is assigned to the other part 8 of the primary chamber.
  • the two halves 6, 7 are delimited from one another by a partition 9 and are accessible via pipe sockets 10 and 11 serving as manholes.
  • the tubes 2 consist of Incoloy 800 and have an outer diameter of 22 mm and a wall thickness of 1.2 mm.
  • the cleaning tool according to the invention is designated as a whole by 14. It comprises a mounting base plate 15 to which a sleeve 16 is rotatably attached.
  • the cuff has at its lower end a first drive unit 17 which is supplied with drive energy, for example voltage for actuating an electric motor, via a line 18.
  • a hollow shaft 20 with an outer diameter of 21.5 mm is arranged in the sleeve 16 with a clamping connection (not shown). At its lower end, this carries a further drive motor 21, which is supplied with drive energy via a line 22. All remote-controlled functions of the tool 14 are controlled from a mobile control panel 24, which is connected to the tool 14 via a multi-core cable 25.
  • the control operates electrically in the exemplary embodiment. However, it could also be operated pneumatically by compressed air or hydraulically together with the drives 17, 21.
  • the tube sheet 5 with the bore 26 for the tube 2 ' is shown in simplified form and on a larger scale, the tube end 13 of which is to be cleaned.
  • the hollow shaft 20 can be seen from the tool 14 in FIGS. 2 to 4 as it is guided in the bore 26 with a centering ring 27.
  • the hollow shaft 20 is closed with a conical guide tip 28.
  • the diameter of the guide tip 28 is slightly smaller than the inner diameter of the tube 2 ', so that the hollow shaft 20 is centered with the guide tip 28 in the tube end 13.
  • a two-armed lever 30 is pivotally mounted on a cross pin 31 in a slot 29 in the hollow shaft 20.
  • the arm 33 of the lever 30 facing the guide tip 28 is pulled in the position shown in FIG. 2 by a spring 35 against a stop 36, which is also designed as a transverse pin.
  • the arm 33 is longer than the radius of the hollow shaft. It can therefore be pivoted out of the slot 29 by a clockwise movement, as can be seen in FIG. 3.
  • a longitudinally displaceable rod 40 is arranged in the hollow shaft 20.
  • the rod 40 is limited in its longitudinal movement by a pin 41 which extends into elongated holes 42 and 43 on opposite sides of the hollow shaft.
  • the longitudinal movement is 10 mm, for example.
  • the free end 45 of the rod 40 is formed as an acute cross-section with the two legs 46 and 47.
  • the angle is 80 0 .
  • Its apex 49 forming the apex engages in one. also angular recess 50 of the arm 39.
  • the angle of the recess 50 is greater than the angle of the tip 49 with 130 0.
  • the angle of the recess 50 with respect to the pivot axis 31 of the lever 30 is arranged so that the tip 49 through their lateral offset with respect to the pivot axis 31 causes the clockwise pivoting of the lever 30, which increases from the position visible in FIG the position shown in Fig. 3 leads. This pivoting movement is limited by the stop of the bolt 41 at the upper end of the elongated holes 42 and 43. It can also be determined in that the leg 46 of the tip 45 meets the shorter leg of the angle of the recess 50.
  • the arm 33 of the lever 30 carries at its free end a steel brush attachment 52.
  • the bristles 53 of the brush lie down on the outside of the tube end 13 with a force given by the spring 35 when the rod 40 is moved downwards a rotation of the hollow shaft 20 determined by the drive 21, which is indicated in FIG. 3 by the arrow 55, the pipe end 13 is cleaned. After this cleaning, the hollow shaft 20 can be moved down. Then the lever 33 returns under the action of the spring 35 into the recess 37 as soon as the bristles 53 have passed the edge of the tube end. The hollow shaft 20 can thus be extended freely through the bore of the tube sheet 5.
  • Fig. 4 reveals that the slot 29 has a rectangular cross-section, i.e. flat walls. It also shows that the tip 45 of the rod 40 has flat boundary surfaces. Likewise, the surfaces forming the recess 50 are also designed as a plane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
EP84102394A 1983-03-22 1984-03-06 Outil pour le nettoyage à distance des extrémités des tubes d'un faisceau tubulaire Expired EP0120355B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833310325 DE3310325A1 (de) 1983-03-22 1983-03-22 Werkzeug zum fernbedienbaren reinigen der rohrenden eines rohrbuendels
DE3310325 1983-03-22

Publications (3)

Publication Number Publication Date
EP0120355A2 true EP0120355A2 (fr) 1984-10-03
EP0120355A3 EP0120355A3 (en) 1985-04-17
EP0120355B1 EP0120355B1 (fr) 1986-11-12

Family

ID=6194272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102394A Expired EP0120355B1 (fr) 1983-03-22 1984-03-06 Outil pour le nettoyage à distance des extrémités des tubes d'un faisceau tubulaire

Country Status (2)

Country Link
EP (1) EP0120355B1 (fr)
DE (2) DE3310325A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2202749C1 (ru) * 2001-08-20 2003-04-20 Воронежская государственная архитектурно-строительная академия Теплообменник
WO2012022531A3 (fr) * 2010-08-17 2012-11-22 Areva Np Gmbh Procédé et dispositif de prélèvement d'un échantillon dans un générateur de vapeur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231696A (en) * 1978-06-14 1980-11-04 Westinghouse Electric Corp. Multi-function end effector
US4262402A (en) * 1978-10-18 1981-04-21 Westinghouse Electric Corp. Method for servicing a steam generator
DE3029811A1 (de) * 1980-08-06 1982-02-18 Kraftwerk Union AG, 4330 Mülheim Manipulator zur fernbedienbaren inspektion und gegebenenfalls reparatur von waermtauscherrohren
US4369662A (en) * 1981-02-25 1983-01-25 Westinghouse Electric Corp. Plug installation apparatus
FR2504306A1 (fr) * 1981-04-17 1982-10-22 Framatome Sa Dispositif de mise en place et d'extraction d'un moyen de controle ou d'un outil dans un equipement recepteur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2202749C1 (ru) * 2001-08-20 2003-04-20 Воронежская государственная архитектурно-строительная академия Теплообменник
WO2012022531A3 (fr) * 2010-08-17 2012-11-22 Areva Np Gmbh Procédé et dispositif de prélèvement d'un échantillon dans un générateur de vapeur
KR101416334B1 (ko) 2010-08-17 2014-07-09 아레바 게엠베하 증기 발생기에서 샘플을 취득하기 위한 방법 및 장치

Also Published As

Publication number Publication date
EP0120355A3 (en) 1985-04-17
DE3461337D1 (en) 1987-01-02
EP0120355B1 (fr) 1986-11-12
DE3310325A1 (de) 1984-09-27

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