EP0250881A1 - Procédé pour déposer un matériau fluide sur la face interne d'un corps creux et dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé pour déposer un matériau fluide sur la face interne d'un corps creux et dispositif pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0250881A1
EP0250881A1 EP87107775A EP87107775A EP0250881A1 EP 0250881 A1 EP0250881 A1 EP 0250881A1 EP 87107775 A EP87107775 A EP 87107775A EP 87107775 A EP87107775 A EP 87107775A EP 0250881 A1 EP0250881 A1 EP 0250881A1
Authority
EP
European Patent Office
Prior art keywords
swirl
carrier gas
gas stream
cavity
loaded
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
EP87107775A
Other languages
German (de)
English (en)
Other versions
EP0250881B1 (fr
Inventor
Beat Eckert
Guido Huber
Norbert Richle
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.)
Lonza AG
Original Assignee
Lonza 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 Lonza AG filed Critical Lonza AG
Publication of EP0250881A1 publication Critical patent/EP0250881A1/fr
Application granted granted Critical
Publication of EP0250881B1 publication Critical patent/EP0250881B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes

Definitions

  • the invention relates to a method for applying a flowable substance to the inner surface of a hollow body and a device for carrying out the method.
  • the loaded carrier gas stream with the swirl must first force the air at rest in the cavity through and out of the cavity. Part of its swirl is transferred to this air and is lost for the application of the substance to the inner surface of the hollow body.
  • the loaded carrier gas stream flows through the cavity, its velocity and swirl near the inner surface are less than in the center of the cavity cross-section. The flow becomes laminar due to the friction on the inner surface, especially when it is rough, e.g. in the case of a bowl, is covered with a layer of scale. Overall, only part of the swirl imparted to the loaded carrier gas tom is effective for applying the substance to the inner surface.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of improving the method and the device of the type mentioned to a larger part of the substance with which the carrier gas stream, the swirl issued, is loaded, to bring to the inner surface of the hollow body.
  • twist is to be understood in the sense of a screwing movement or a helical movement.
  • the advantages achieved by the invention are essentially to be seen in the fact that the loaded carrier gas stream with the swirl when entering the cavity does not encounter still air, but rather the additional, unloaded gas stream which is in the same direction and with a swirl of the same direction of rotation how the laden carrier gas stream is already flowing through the cavity.
  • the loaded carrier stream acts immediately at full speed and with all the twist given to it for applying the substance to the inner surface, from one end of the cavity to the other.
  • the additional gas flow is continued for at least part of the duration of the loaded carrier gas stream, the loss of speed and swirl caused by friction of the loaded carrier gas stream on the inner surface can be canceled out by the action of the additional gas stream during this time, so that overall a swirl to the effect comes, which can be the swirl given to the carrier gas flow, depending on the speed and swirl of the additional gas flow, but also larger (or smaller) than that.
  • the additional gas flow acts only near the inner surface of the cavity.
  • Both the carrier gas and the additional gas which is not loaded with the substance can, depending on the type of substance, the material of the hollow body or the application of the method or use of the device, air or another, in particular inert gas or a gas mixture and do not have to be the same, especially since the first with the material and only later with the material and the other first alone and possibly later together with the carrier gas-substance mixture with the (in the case of a glowing bob) the inner surface of the cavity comes into contact.
  • the other gas could also be or contain a liquid in the gaseous phase or an aerosol.
  • the flowable substance can be a semi-liquid, a paste, a molten or particulate material, such as powder, granular material, short fibers or chips, a liquid or a mixture of such substances.
  • the gas flow leaving the cavity and containing the carrier gas and the additional gas and a remainder of the substance can be sucked off to support the flow in the cavity, the rest of the substance, if it consists of fine particles, can be separated in a separator for further use .
  • the invention is explained in more detail below with reference to a drawing which represents only one embodiment.
  • the single figure shows a perspective view of a partially sectioned device for carrying out the method for applying a flowable substance to the inner surface of a hollow body, the cavity of which is continuous and at least approximately cylindrical.
  • This device is particularly suitable for the application of the method for applying a flowable descaling agent to the inner surface of blanks in the manufacture of seamless pipes.
  • Its essential part in connection with the invention is a passage element 1 for a carrier gas stream loaded with the substance.
  • Guide vanes 3 are arranged in the passage space 2 of the passage member 1 and form a swirl generator for the loaded carrier gas stream.
  • the passage element 1 is provided with a feed device, in the drawing with nozzles 4 for an additional gas not loaded with the substance, the outflow directions of which are arranged obliquely to the axis of the passage space 2 in order to give this gas a swirl with the direction of rotation 5 of the through Guide vanes 3 formed swirl sensor. In the drawing, this is a right-hand twist.
  • the nozzles 4 can be designed as Laval nozzles.
  • the feed line 7 for the loaded carrier gas is guided together with the passage element 1 through a displacement unit 8 with a thrust path of, for example, 40 cm and a flexible sleeve 9, which make it possible to bring the passage element 1 towards the cavity, center it with respect to it and withdraw again.
  • the passage member 1 is conical as a diffuser. For smaller diameter cavities, however, a cylindrical design may be appropriate. Between the end (mouthpiece 16) of the feed line 7 and the entrance of the passage element 1 there is an intermediate space 12, which is open on the circumference, e.g. 15-35, preferably 20-30 mm in length, as a result of which the effect known in jet apparatuses (jet pumps, atomizers) is achieved, which causes a better distribution of the substance in the carrier gas stream leaving the passage element. If the access of air to the loaded carrier gas stream is undesirable, an annular space with gas supply which is closed to the outside and surrounds the intermediate space can be provided. Lines 13 leading to the nozzles 4 run along the intermediate space 12 and are connected to a cylinder 14 enclosing part of the supply line 7 and having a connection 15 for supplying the additional gas.
  • a displacer 18 which is flared in the direction of flow, in the case of the diffuser a diffuser cone which is hollow and open at both ends in order to support the above-mentioned effect, which is known in jet devices.
  • the passage element 1 or the diffuser has a double jacket 20 with a feed line 21 and a discharge line for cooling water, not shown, and the displacement body 18 or diffuser cone is hollow in order to keep the heating by heat radiation from the glowing cap small. For this reason, the guide vanes 3 are connected to the cooled jacket in a heat-conducting manner as well as possible, for example by welding.
  • the guide vanes 3 are groove-like in cross-section and curved in their longitudinal direction, so that the hollow side of each of these curvatures lies in the direction of rotation 5 of the swirl caused.
  • the radius of curvature of the channel profile increases in the direction of flow, corresponding to the increase in the diameter of the conical diffuser.
  • the guide vanes can be helical (without the curvatures).
  • the guide vanes 3 can deviate from the design shown at the outlet of the passage element e.g. 5 cm protruding ends (not shown), the width of which decreases in the flow direction in such a way that the guide vane ring is tapered in the area of these ends in order to grip the hollow body in its cavity when approaching the passage element 1 and to access the hollow body in relation to it center.
  • the nozzles 4 for supplying the additional gas not loaded with the substance are arranged at the exit of the passage element 1 at the end of a guide vane 3 so skewed to the axis 6 of the passage space 2 that the swirl angle (the one tangent to the helix corresponding to the swirl) with the helix axis) is greater (the helix angle of this helix is therefore smaller) than the helix angle (or helix angle) of the helix of the carrier gas stream loaded with the substance.
  • a conically enlarged passage element In the case of a conically enlarged passage element (diffuser 1), three to six, preferably four, guide vanes can be used; in the case of a cylindrical passage element, four up to twelve, preferably six to ten guide vanes can be provided.
  • a nozzle 4 is expediently arranged at the end of every second guide vane 3.
  • the angle at the cone tip of the displacer body (or diffuser cone) 18 can be 35 degrees for a cavity diameter of 15-20 cm, 30 degrees for smaller cavity diameters and 40 degrees for larger cavity diameters.
  • the angle at the tip of its cone can be equal to that of the displacer body 18.
  • the inside diameter of the mouthpiece 16 at the end of the feed line 7 is expediently 10 mm for the loaded carrier gas stream if 100-150 grams of powdered descaling agent are used per slug, or up to 30 mm if approx. 400 each Grams of descaling agent can be used.
  • passage elements 1 of different sizes also with different swirl angles, in particular conical passage elements for larger diameters and cylindrical ones for small diameters, can optionally be attached individually to the end piece of the pipeline 7 for the laden carrier gas stream.
  • the glowing blob is brought to the device so that the slug cavity has a sufficiently coaxial passage space of the passage member is. Then the device is brought close to the cavity and, if necessary, centered by actuating the displacement unit 8, the sleeve 9 giving way and, if appropriate, the (not shown) tapered blade ring end being guided into the cavity as a centering means. Then air not loaded with the descaling agent is first supplied to the connection 14 at a pressure of, for example, 6 bar and blown through the nozzles 4 into the cavity.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Powder Metallurgy (AREA)
EP87107775A 1986-07-03 1987-05-29 Procédé pour déposer un matériau fluide sur la face interne d'un corps creux et dispositif pour la mise en oeuvre du procédé Expired - Lifetime EP0250881B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2682/86 1986-07-03
CH2682/86A CH668717A5 (de) 1986-07-03 1986-07-03 Verfahren zum aufbringen eines fliessfaehigen stoffes auf die innenflaeche eines hohlkoerpers und einrichtung zur durchfuehrung des verfahrens.

Publications (2)

Publication Number Publication Date
EP0250881A1 true EP0250881A1 (fr) 1988-01-07
EP0250881B1 EP0250881B1 (fr) 1990-05-09

Family

ID=4239209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107775A Expired - Lifetime EP0250881B1 (fr) 1986-07-03 1987-05-29 Procédé pour déposer un matériau fluide sur la face interne d'un corps creux et dispositif pour la mise en oeuvre du procédé

Country Status (9)

Country Link
US (1) US4790263A (fr)
EP (1) EP0250881B1 (fr)
JP (1) JPH0771689B2 (fr)
CA (1) CA1261684A (fr)
CH (1) CH668717A5 (fr)
DE (1) DE3762632D1 (fr)
ES (1) ES2015918B3 (fr)
MX (1) MX170547B (fr)
SU (1) SU1620042A3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309945A2 (fr) * 1987-09-29 1989-04-05 Lonza Ag Dispositif pour appliquer un agent de décalaminage sur la surface intérieure d'une loupe
EP0324937A1 (fr) * 1988-01-19 1989-07-26 Lonza Ag Dispositif pour charger un gaz porteur avec une substance fluide et méthode pour l'exploitation du dispositif
EP0335079A2 (fr) * 1988-03-30 1989-10-04 Lonza Ag Procédé et dispositif de fabrication de tuyaux à partir de loupes
US5099667A (en) * 1989-06-16 1992-03-31 Lonza Ltd. System for suspending and applying solid lubricants to tools or work pieces
US5205488A (en) * 1990-03-26 1993-04-27 Lonza Ltd. Process and device for spraying a liquid intermittently, especially a lubricant suspension to be sprayed under high pressure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2510714C1 (ru) * 2012-10-24 2014-04-10 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Способ винтовой прокатки гильз

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133937A1 (fr) * 1983-08-17 1985-03-13 Lonza Ag Procédé pour le décapage de loupes
EP0172366A1 (fr) * 1984-07-23 1986-02-26 Lonza Ag Méthode et dispositif pour le décapage de pièces de travail pour la fabrication de tuyaux

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US679756A (en) * 1901-05-23 1901-08-06 William Bonbright Kennedy Steam and hot-air flue-cleaner.
US998762A (en) * 1911-05-19 1911-07-25 Cement Appliances Company Apparatus for combining comminuted solids and liquid.
US4090666A (en) * 1976-05-19 1978-05-23 Coors Container Company Gun for tribo charging powder
US4055025A (en) * 1976-11-22 1977-10-25 Union Carbide Corporation Apparatus for improved cleaning of pipeline inlets
GB2123917B (en) * 1982-04-30 1986-02-12 Hakko Co Lining underground pipes
US4452169A (en) * 1982-09-24 1984-06-05 Shinich Matsuda Reviving apparatus for fluid passages
US4668534A (en) * 1986-01-21 1987-05-26 Ben E. Meyers Method and apparatus for applying fusion bonded powder coatings to the internal diameter of tubular goods

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133937A1 (fr) * 1983-08-17 1985-03-13 Lonza Ag Procédé pour le décapage de loupes
EP0172366A1 (fr) * 1984-07-23 1986-02-26 Lonza Ag Méthode et dispositif pour le décapage de pièces de travail pour la fabrication de tuyaux

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309945A2 (fr) * 1987-09-29 1989-04-05 Lonza Ag Dispositif pour appliquer un agent de décalaminage sur la surface intérieure d'une loupe
EP0309945A3 (en) * 1987-09-29 1990-05-30 Lonza Ag Device for applying a descaling agent to the inner surface of a loop
EP0324937A1 (fr) * 1988-01-19 1989-07-26 Lonza Ag Dispositif pour charger un gaz porteur avec une substance fluide et méthode pour l'exploitation du dispositif
US5042209A (en) * 1988-01-19 1991-08-27 Lonza Ltd. Process for charging a carrier gas stream with a free-flowing material and process for operating the device
EP0335079A2 (fr) * 1988-03-30 1989-10-04 Lonza Ag Procédé et dispositif de fabrication de tuyaux à partir de loupes
EP0335079A3 (fr) * 1988-03-30 1991-09-18 Lonza Ag Procédé et dispositif de fabrication de tuyaux à partir de loupes
US5099667A (en) * 1989-06-16 1992-03-31 Lonza Ltd. System for suspending and applying solid lubricants to tools or work pieces
US5205488A (en) * 1990-03-26 1993-04-27 Lonza Ltd. Process and device for spraying a liquid intermittently, especially a lubricant suspension to be sprayed under high pressure

Also Published As

Publication number Publication date
MX170547B (es) 1993-08-31
ES2015918B3 (es) 1990-09-16
DE3762632D1 (de) 1990-06-13
JPH0771689B2 (ja) 1995-08-02
CH668717A5 (de) 1989-01-31
EP0250881B1 (fr) 1990-05-09
US4790263A (en) 1988-12-13
SU1620042A3 (ru) 1991-01-07
CA1261684A (fr) 1989-09-26
JPS6313614A (ja) 1988-01-20

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