EP0173896A1 - Dispositif pour appliquer un gaz liquéfié à bas point d'ébullition aux revêtements internes de tubes - Google Patents

Dispositif pour appliquer un gaz liquéfié à bas point d'ébullition aux revêtements internes de tubes Download PDF

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Publication number
EP0173896A1
EP0173896A1 EP85110197A EP85110197A EP0173896A1 EP 0173896 A1 EP0173896 A1 EP 0173896A1 EP 85110197 A EP85110197 A EP 85110197A EP 85110197 A EP85110197 A EP 85110197A EP 0173896 A1 EP0173896 A1 EP 0173896A1
Authority
EP
European Patent Office
Prior art keywords
arms
coatings
pipes
tube
low boiling
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Withdrawn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
EP85110197A
Other languages
German (de)
English (en)
Inventor
Albert Dr. Köhler
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0173896A1 publication Critical patent/EP0173896A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies

Definitions

  • the invention relates to a device for applying a low-boiling liquefied gas to coatings in pipes, according to the preamble of claim 1.
  • the term pipes is also intended to include long cylindrical vessels.
  • the invention has for its object to provide a device that makes it possible to apply a low-boiling liquefied gas to the inner surface of internally coated pipes, even if it is pipes with small diameters.
  • Fig.1 u. 2 shows a tube 1 which has a coating 2 on the inside which is to be removed.
  • a self-centering guide star which is arranged in the interior of the tube 1 and which can be displaced in the interior of the tube 1 serves for this purpose.
  • the guide star consists of a central piece 3, in which a spray nozzle 4 for liquid nitrogen is attached.
  • the nitrogen is supplied through a tube 5, which is surrounded by a jacket made of polyamide for insulation.
  • elastic arms 6 are attached at an angle of 120 °.
  • the free ends of the elastic arms 6 are provided with support rollers 7 which roll along the coating 2.
  • the elastic arms 6 are also inclined in the direction of movement to the tube axis.
  • the direction of movement of the guide star is indicated by an arrow 8.
  • the movement is carried out by pushing the guide star through the tube 1 by means of the tube 5.
  • the tube 5 is mounted in a ball bushing 9, the one Linear feedthrough enabled.
  • the ball bushing 9 itself is fastened in a flange 10 which is pressed onto the pipe end with the aid of three tie rods 11.
  • the counter bearing for the tie rods 11 form three small blocks 12 which are attached to the outside of the tube at an angle of 120 °.
  • the guide star When starting up, the guide star is slowly pushed through the tube in the direction of arrow 8 and the coating 2 is progressively sprayed with liquid nitrogen. The developing nitrogen gas escapes through the open pipe end. As soon as the coating 2 is permanently brittle, the flange 10 is removed, the guide star is removed and the coating is removed by mechanical action. As a rule, light hammer blows on the outside of the tube are sufficient. If the coating is not to be removed in a tube, but in a long cylindrical container, 10 openings must be provided in the flange through which the gaseous nitrogen can escape.
  • the arms 6 consist of a material which also has elastic properties even in the low temperature range.
  • the arms are advantageously formed from a plastic with corresponding properties as leaf springs. This structure is particularly simple and robust. It is advantageous if the arms 6 are attached to the central piece 3 in an easily replaceable manner. Arms 6 of different lengths can then be fastened on the central piece 3, so that an adaptation to different pipe diameters is possible.
  • the flange 10 it is expedient to design the flange 10 so that it can be attached to different pipe diameters.
  • the holes for Recording the tie rod 6 in the flange have different distances from the center of the flange. In the case of pipes with a large diameter, the holes located further inside are screwed in so that no gas can escape through them.
  • the elastic arms 6 are also possible. They can also be arranged vertically on the central piece 3 and must then be elastic perpendicular to the pipe axis. This is e.g. possible with the help of coil springs, but the material embrittlement that begins at low temperatures sets such constructions limits.
  • the central piece of the guide star is designed as a tube section 13, at the ends of which three elastic arms 6 are each arranged at 120 °. The arms 6 are inclined towards the tube axis on both sides.
  • the nitrogen is supplied through an elastic insulating tube 14, which is guided through a bore in the flange 10.
  • the guide star is pulled through the tube 1 by means of a chain 15.
  • This modified device can also be moved through a curved tube, since the insulating tube 14 and the chain 15 adapt to the tube curvature. Because of the elasticity of the arms 6, even relatively sharp curvatures can be traversed.

Landscapes

  • Coating Apparatus (AREA)
EP85110197A 1984-09-07 1985-08-14 Dispositif pour appliquer un gaz liquéfié à bas point d'ébullition aux revêtements internes de tubes Withdrawn EP0173896A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843432869 DE3432869A1 (de) 1984-09-07 1984-09-07 Vorrichtung zum aufbringen eines tiefsiedenden verfluessigten gases auf beschichtungen in rohren
DE3432869 1984-09-07

Publications (1)

Publication Number Publication Date
EP0173896A1 true EP0173896A1 (fr) 1986-03-12

Family

ID=6244844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110197A Withdrawn EP0173896A1 (fr) 1984-09-07 1985-08-14 Dispositif pour appliquer un gaz liquéfié à bas point d'ébullition aux revêtements internes de tubes

Country Status (3)

Country Link
EP (1) EP0173896A1 (fr)
DE (1) DE3432869A1 (fr)
ZA (1) ZA856835B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4028434A1 (de) * 1990-09-07 1992-03-12 Georg Michael Prof Dr In Daerr Verfahren zur sanierung von mit schadstoffbelasteten, dauerelastischen dehnfugenmassen versehenen bauanordnungen
DE19807635A1 (de) * 1998-02-23 1999-08-26 Air Liquide Gmbh Verfahren und Einrichtung zum Entfernen bituminöser und ähnlicher Verunreinigungsschichten von der Oberfläche einer Wandung
CN104801437A (zh) * 2015-05-13 2015-07-29 李梦 一种圆径管路的内壁喷涂装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859728A (en) * 1956-08-29 1958-11-11 James D Hobdy Spray nozzle
DE1248390B (de) * 1959-04-22 1967-08-24 Alberto J Reinhart Vorrichtung zum Entkrusten von Rohrleitungen
DE1750782A1 (de) * 1967-06-28 1971-03-11 Arx Paul Von Vorrichtung,mit deren Hilfe die Innenwand eines Rohres gereinigt und/oder mit einem Schutzanstrich versehen werden kann
US4164325A (en) * 1977-11-21 1979-08-14 Watson John D High-pressure-rotary-nozzle apparatus
DE2906496A1 (de) * 1979-02-20 1980-08-28 Linde Ag Verfahren zum loesen von geklebten kunststoffplatten
US4475260A (en) * 1983-01-31 1984-10-09 Beck Richard D Pipeline servicing tool

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859728A (en) * 1956-08-29 1958-11-11 James D Hobdy Spray nozzle
DE1248390B (de) * 1959-04-22 1967-08-24 Alberto J Reinhart Vorrichtung zum Entkrusten von Rohrleitungen
DE1750782A1 (de) * 1967-06-28 1971-03-11 Arx Paul Von Vorrichtung,mit deren Hilfe die Innenwand eines Rohres gereinigt und/oder mit einem Schutzanstrich versehen werden kann
US4164325A (en) * 1977-11-21 1979-08-14 Watson John D High-pressure-rotary-nozzle apparatus
DE2906496A1 (de) * 1979-02-20 1980-08-28 Linde Ag Verfahren zum loesen von geklebten kunststoffplatten
US4475260A (en) * 1983-01-31 1984-10-09 Beck Richard D Pipeline servicing tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, Sektion M, Band 3, Nr. 97 (M-69), 17. August 1979 THE PATENT OFFICE JAPANESE GOVERNMENT Seite 153 M 69 * JP - A - 54-73 472 * *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4028434A1 (de) * 1990-09-07 1992-03-12 Georg Michael Prof Dr In Daerr Verfahren zur sanierung von mit schadstoffbelasteten, dauerelastischen dehnfugenmassen versehenen bauanordnungen
DE19807635A1 (de) * 1998-02-23 1999-08-26 Air Liquide Gmbh Verfahren und Einrichtung zum Entfernen bituminöser und ähnlicher Verunreinigungsschichten von der Oberfläche einer Wandung
DE19807635B4 (de) * 1998-02-23 2015-12-17 Air Liquide Gmbh Dosierwaage mit einer Einrichtung zum Entfernen bituminöser und ähnlicher Verunreinigungsschichten von der Oberfläche einer Wandung
CN104801437A (zh) * 2015-05-13 2015-07-29 李梦 一种圆径管路的内壁喷涂装置

Also Published As

Publication number Publication date
ZA856835B (en) 1986-04-30
DE3432869A1 (de) 1986-03-20

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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18D Application deemed to be withdrawn

Effective date: 19861113

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KOEHLER, ALBERT, DR.