US3816938A - Method and device for drying enamel slip on inner surfaces of pipes - Google Patents

Method and device for drying enamel slip on inner surfaces of pipes Download PDF

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Publication number
US3816938A
US3816938A US00237135A US23713572A US3816938A US 3816938 A US3816938 A US 3816938A US 00237135 A US00237135 A US 00237135A US 23713572 A US23713572 A US 23713572A US 3816938 A US3816938 A US 3816938A
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US
United States
Prior art keywords
pipe
inductor
drying
slip
standpipe
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.)
Expired - Lifetime
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US00237135A
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English (en)
Inventor
E Nikolaevich
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Individual
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Individual
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Publication date
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Publication of US3816938A publication Critical patent/US3816938A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/006—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles
    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D7/00—Treating the coatings, e.g. drying before burning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection

Definitions

  • ABSTRACT A method and device for drying enamel slip on the inner surface of pipes by induction heating wherein the vapours generated during drying of the slip are sucked out from inside the pipe.
  • the pipe In the process of heating, the pipe is usually moved progressively by any kind of suitable mechanism along its axis with relation to the inductor which fits around said pipe so that the pipe is heated successively, i.e. at any given moment of time a part of the pipe located in the zone of the inductor is heated while its other part, located outside of the inductor, remains cold.
  • the slip coating when the slip coating is drying, the water vapours are generated in the heated part of the pipe; rising along the pipe towards its cold part, the water vapours are condensed on a principle of a reflux condenser. The accumulated condensate drips down and washes off the enamel slip applied to the inner surface of the pipe.
  • An object of the invention resides in eliminating the aforesaid disadvantages.
  • the present invention relates to the method of drying enamel slip applied to the inner surface of pipes utilizing induction heating.
  • the improvement consists provides for the vapours generated during drying of the slip to be sucked from inside the pipe in order to prevent accumulation of condensate on the inner surface of the cold part of the pipe.
  • the device comprises a standpipe insertedinto the pipe being heated, one end of said standpipe being located in the zone of the inductor while the other end is located outside of the pipe and connected to a suction device.
  • the end of the standpipe located in the inductor zone be made in the form of a perforated head for better suction of the vapours.
  • the heating inductor 1 is rigidly secured on a bed 2 installed above a well 3, and connected to a current transformer 4.
  • a capacitance 5 is cut into the heating circuit.
  • the pipe 6 with a layer of enamel slip (not shown) applied to its inner surface is moved axially by any suitable conventional mechanism through the inductor l in the direction shown by arrow A.
  • One such mechanism could comprise a holder 17 attached to trolley 19 by arm 18, trolley 19 being movable in guide 20 through the action of a control means 21 therefor.
  • a hollow standpipe 7 inserted into the pipe 6 for sucking out the vapours generated while the slip is drying in the heated pipe.
  • the suction head 8 (upper end) of the standpipe 7 is located in the zone of the inductor l and has a multitude of holes 9 for the passage of the vapours.
  • the holes 9 are located around the entire circular zone of the inductor 1.
  • a suction device 12 fan
  • the standpipe 7 is closed by an inclined bottom plate 13 which takes the condensing water into the receiver 14 from which it is sucked out by the pump 16 through a pipe 15.
  • the method of drying according to the invention can be made more apparent by describing the principle of operation of the device.
  • the baked enamel coating has a uniform thickness and a structure noted for high physical and chemical properties.
  • a method of drying enamel slip on the inner surface of a pipe by the induction method which corn prises disposing a pipe with a layer of enamel slip coated on the inner surface thereof inside an inductor so that said inductor embraces the pipe on the outside; inserting a hollow standpipe inside said pipe to evacuate said pipe of vapors generated on slip drying as a result of pipe heating; energizing said inductor to heat said pipe; moving said pipe progressively in the course of heating axially with relation to said inductor embracing it on the outside, and connecting said standpipe to suction means to remove vapors generated on slip drying in order to prevent formation of condensate on the inner surface of the unheated end of the pipe.
  • a device for drying enamel slip on the inner surface of pipes by induction heating comprising: a heat ing inductor installed immovably around the pipe to be heated; a mechanism for moving the pipe during heating axially with relation to said inductor; a hollow standpipe one end of which is inserted into the pipe and located in the zone of said inductor while the other end protrudes from the pipe; and a suction device connected to the end of said standpipe protruding from the pipe.
  • a device wherein the end of the hollow standpipe located in the zone of said inductor has a multitude of holes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Biomedical Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)
US00237135A 1972-04-06 1972-03-22 Method and device for drying enamel slip on inner surfaces of pipes Expired - Lifetime US3816938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7212090A FR2179306A5 (enExample) 1972-04-06 1972-04-06

Publications (1)

Publication Number Publication Date
US3816938A true US3816938A (en) 1974-06-18

Family

ID=9096424

Family Applications (1)

Application Number Title Priority Date Filing Date
US00237135A Expired - Lifetime US3816938A (en) 1972-04-06 1972-03-22 Method and device for drying enamel slip on inner surfaces of pipes

Country Status (4)

Country Link
US (1) US3816938A (enExample)
CH (1) CH535288A (enExample)
DE (1) DE2213452C3 (enExample)
FR (1) FR2179306A5 (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357761A (en) * 1981-01-08 1982-11-09 Makeev Anatoly E Apparatus for drying enamel slip coatings on pipes
US4680871A (en) * 1985-05-17 1987-07-21 David Reznik Apparatus and method for drying and curing coated substrates
US4694586A (en) * 1985-05-17 1987-09-22 David Reznik Apparatus and method for drying and curing coated substrates
US6399145B1 (en) * 1999-07-22 2002-06-04 Patent-Treuhand-Gessellschaft Fuer Elektrische Gluehlampen Mbh Method for coating lamp bulbs

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3100948C2 (de) * 1981-01-14 1984-09-27 Respublikanskij gosudarstvennyj institut po proektirovaniju ob"ektov proizvodstvennoj bazy vodochozjajstvennych organizacij "Rosgiprovodprom", Rostov-na-Donu Vorrichtung zum Trocknen des Schlickers beim Emaillieren von Rohren
FR2501729A1 (fr) * 1981-03-12 1982-09-17 Respub G Insti Dispositif pour le sechage de la couche de barbotine appliquee au cours de l'emaillage de tubes
DE4402125C2 (de) * 1994-01-21 1998-07-02 Keulahuette Krauschwitz Gmbh Verfahren zur Emaillierung der Innenfläche von Erzeugnissen
FR2734501B1 (fr) * 1995-05-23 1997-07-04 Stein Heurtey Procede et dispositif de revetement de bandes metalliques
RU2146306C1 (ru) * 1997-12-23 2000-03-10 Научно-технический центр Предприятия "Кубаньгазпром" Способ сушки шликера эмали, нанесенного на поверхность трубы

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1997761A (en) * 1931-01-23 1935-04-16 Chrysler Corp Method of internally coating hollow articles
US2555450A (en) * 1943-11-29 1951-06-05 Lee Foundation For Nutritional High-frequency dehydrating method and apparatus
US2848566A (en) * 1954-02-01 1958-08-19 Smith Corp A O Induction heating apparatus for fusing vitreous enamel
US3287097A (en) * 1962-01-02 1966-11-22 Smith Corp A O Method and apparatus of fusing a coating to a metal surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1997761A (en) * 1931-01-23 1935-04-16 Chrysler Corp Method of internally coating hollow articles
US2555450A (en) * 1943-11-29 1951-06-05 Lee Foundation For Nutritional High-frequency dehydrating method and apparatus
US2848566A (en) * 1954-02-01 1958-08-19 Smith Corp A O Induction heating apparatus for fusing vitreous enamel
US3287097A (en) * 1962-01-02 1966-11-22 Smith Corp A O Method and apparatus of fusing a coating to a metal surface

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
The Iron Age May 3, 1945 Pgs. 46 50 Resin Coatings Baked by Induction Heating by Mazzucchelli et al. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357761A (en) * 1981-01-08 1982-11-09 Makeev Anatoly E Apparatus for drying enamel slip coatings on pipes
US4680871A (en) * 1985-05-17 1987-07-21 David Reznik Apparatus and method for drying and curing coated substrates
US4694586A (en) * 1985-05-17 1987-09-22 David Reznik Apparatus and method for drying and curing coated substrates
AU587454B2 (en) * 1985-05-17 1989-08-17 David Reznik Apparatus and method for drying and curing coated substrates
US6399145B1 (en) * 1999-07-22 2002-06-04 Patent-Treuhand-Gessellschaft Fuer Elektrische Gluehlampen Mbh Method for coating lamp bulbs

Also Published As

Publication number Publication date
DE2213452B2 (de) 1975-04-24
CH535288A (de) 1973-03-31
FR2179306A5 (enExample) 1973-11-16
DE2213452A1 (de) 1973-10-04
DE2213452C3 (de) 1975-11-27

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