EP0038807B1 - Schabergerät mit fluidumanpressvorrichtung für eine behandlungsvorrichtung mit geschabter oberfläche - Google Patents

Schabergerät mit fluidumanpressvorrichtung für eine behandlungsvorrichtung mit geschabter oberfläche Download PDF

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Publication number
EP0038807B1
EP0038807B1 EP19800901891 EP80901891A EP0038807B1 EP 0038807 B1 EP0038807 B1 EP 0038807B1 EP 19800901891 EP19800901891 EP 19800901891 EP 80901891 A EP80901891 A EP 80901891A EP 0038807 B1 EP0038807 B1 EP 0038807B1
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EP
European Patent Office
Prior art keywords
blade
blade holder
shaft
collar
hand
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
Application number
EP19800901891
Other languages
English (en)
French (fr)
Other versions
EP0038807A1 (de
Inventor
Jean-Claude Duprat
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0038807A1 publication Critical patent/EP0038807A1/de
Application granted granted Critical
Publication of EP0038807B1 publication Critical patent/EP0038807B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/008—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using scrapers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/005—Doctor knifes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/28—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position
    • F26B17/284—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position the materials being dried on the non-perforated surface of heated rollers or drums
    • F26B17/286—Arrangements for application of materials to be dried onto the drums or rollers; Arrangements for removing dried materials from the drums or rollers, e.g. doctor blades

Definitions

  • the present invention is in the field of processing devices and in particular rotary cylinder heat exchangers, these devices being used in particular for drying or crystallizing products such as food, pharmaceutical, chemical, etc. and it has for subject of improvements to the scraping members.
  • such treatment devices are generally made up of a generally cylindrical movable surface and of a scraper member, said knife, fixed relative to the frame of the machine and applied according to a generator of the cylinder. It is also recalled that when these devices, as is generally the case, have a heat exchanger function, the uniformity of application of the knife against the cylinder is a source of difficulties, manifested in particular by exaggerated wear. of the blade at certain points, while at other points of the cylinder the film of product is only superficially scraped; these difficulties result essentially from the instability of the adjustment of the force of application of the blade against the cylindrical surface, instability itself linked to the instability of the thermal conditions at different points of the cylinder.
  • the present invention relates more particularly to treatments such as dehydration of food-type products sometimes requiring high scraping pressures.
  • the object of the present invention is to provide means for elastic adjustment of the force of application of the blade against the cylinder, the force of application being approximately constant regardless of the dimensional variations of the members present linked to the variation in thermal conditions; the ultimate aim being to obtain regular and minimal wear of the blade while avoiding insufficient scraping in certain parts of the surface.
  • a product treatment device said device being of the kind with a cylindrical scraped surface and comprising a scraping assembly known as scraper knives, said scraping assembly consisting of a carrier blade, of a counter-blade part, of a blade and of support means, for maneuvering and applying said parts against said cylindrical surface
  • said device using on the one hand fluidic cylinders for, in known manner, maneuver the blade holder and apply it against the cylindrical surface and, on the other hand, a fluidically deformable pipe disposed between the blade and the counter blade to, in known manner, separate the blade from the counter blade
  • a plurality of fluidic cylinders constituting evenly distributed pressing members along a shaft integral with the frame and fixed relative to it, said cylinders forming articulation of the blade holder on the shaft, each of the v fluid rins being on the one hand connected to the shaft fixed by a solid arm of a collar keyed to the shaft, the arm supporting
  • Such a device combines to act in combination with the fluid cylinders constituting the pressing members, said pressing means constituting a first pressing stage, a fluidically deformable pipe comprised between the blade and the counter blade, said pipe constituting a second pressing stage. It follows that the first and second stages are both maneuverable by means of a fluid; preferably each fluid cylinder is provided with an adjustment means making it possible to independently regulate the fluid pressure in the cylinder.
  • the fluidically deformable pipe is housed in a housing of the counter blade having a cross section in the form of a circular segment comprised between half and the entire circle, the surface of said section being substantially equal to the section of the pipe.
  • a treatment device with a scraped surface which can be a dryer as well as a scalyer, essentially consists of a frame 1, a rotary cylinder 2 constituting the exchange surface and a scraping assembly 3, said scraper knife, fixed on the frame by means of bearings 4 and 5, and whose blade 6 can be supported on a generator of the cylinder 2; as shown in the figure the scraper knife is in the raised position.
  • the scraper knife comprises, on the one hand, support and maneuvering means comprising a shaft 7 mounted on the bearings 4 and 5 and a plurality of pressure members 8, 9, 10 and 11 distributed equally along the shaft, and on the other hand parts comprising a blade holder, a blade and a counter blade, these parts being continuous from one end to the other of the cylinder and being supported by the pressing members; these parts, as well as a pressing member, are described in detail in the following figures.
  • a pressing member consists of a collar 12 mounted around and locked on the tubular shaft 7; the collar 12 comprises an arm 14, the end of which forms a cap 13 for a piston head 16 of a fluid cylinder 17.
  • this double collar comprises a pair of arms such as the arm 15 to serve as a cap for the body of the jack 17; it also includes a plate 18 onto which a blade holder can be bolted 19.
  • the cap 13, the arm 14, the collar 12 and the shaft 7 are integral with each other and normally fixed relative to the frame while the arm 15, the jack 17, the double collar and the plate 18 are movable in rotation around the shaft 7 and can pivot on it, in one direction or the other, under the effect of the jack 17.
  • the jack 17 is supplied with pressure by a pressure reducer 20 allowing the adjustment of the fluid pressure in the jack.
  • the blade holder 19 is moved in the direction of the cylinder 2 and the blade 6 comes to bear against the latter (position in the figure).
  • the assembly described above constitutes on the one hand the first stage of pressing the blade against the cylinder and on the other hand a member for lifting the blade.
  • the blade holder 19 consisting of a T-shaped piece with a length substantially equal to that of the cylinder, is bolted to the plate 18 in line with a pressing member such as that of FIG. 2; on the blade holder the blade 6 is kept bolted by means of a counter blade 24.
  • the counter blade 24 comprises, in the vicinity of its outer edge, a housing 21 with a circular segment section for accommodating a tube or pipe , 22 made of flexible material.
  • the width of the plate 23 of the blade holder serving as a jaw for the blade is very clearly less than the width of the counter blade 24 and that the housing 21 of the blade holder is clearly offset towards the outside relative to the end of the plate 23; it follows from this arrangement that when the pipe 22 is subjected to an internal pressure it can, if it overflows sufficiently from its housing, as is the case shown in the figure, deform the blade 6 and impart bending to it relative to its original position shown in dashes. More precisely and as shown in fig.
  • the outside diameter of the pipe 22 must be slightly less than the diameter of the housing 21 which is substantially circular, so that in the absence of pressure in the pipe, the latter can be flattened by the elastic pressure of the blade, while in the presence of an internal pressure the pipe tends to resume its cylindrical section and to flex the blade elastically.
  • the inflatable element constituted by the hose is equivalent in its function, but at a lower cost, to a multitude of jacks arranged all along the blade, and constitutes the second pressing stage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)

Claims (3)

1. Vorrichtung zum Behandeln von Gut, mit einer zylindrischen, abzurakelnden Fläche und mit einer Rakeleinrichtung mit Rakelklingen, umfassend einen Klingenhalter, einen Gegenklingenhalter, eine Schaberklinge sowie Mittel zum Lagern, Bewegen und Andrücken der genannten Teile gegen die zylindrische Fläche, wobei die Vorrichtung einersets einen Fluid-Antrieb betreibt, um in bekannter Weise den Klingenhalter zu betätigen und diesen gegen die zylindrische Fläche anzudrücken, und andererseits eine verformbare Fluidleitung aufweist, die zwischen der Klinge und der Gegenklinge angeordnet ist, um die Klinge und die Gegenklinge zu spreizen, dadurch gekennzeichnet, daß eine Mehrzahl von Fluid-Antrieben (17) vorgesehen ist, die Bestandteile von Anpressorganen (8 bis 11) bilden und die entlang eines Balkens (7), der seinerseits mit dem Maschinengestell (1) fest verbunden ist, angeordnet und an diesem befestigt sind, die ferner das Gelenk des Klingenhalters (19) am Balken (7) bilden, und deren jeder einerseits mit dem festen Balken (7) durch einen Arm (14) verbunden ist, der einteilig mit einem am Balken (17) befestigten Bund (12) ist, wobei der Arm (14) den Kopf des Kolbens (16) des Antriebs mittels eines Sockels (13) trägt, und wobei jeder der Antriebe (17) andererseits von einem Arm (15) getragen ist, der mit einem dem vorausgegangenen Bund entsprechenden, jedoch um den Balken (7) herum beweglichen Bund verbunden ist, und daß dieser letztgenannte Bund unter Zwischenfügung einer Platine (18) den Klingenhalter (19) trägt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Leitung (22) innerhalb einer Ausnehmung (21) der Gegenklinge (24) angeordnet ist, daß die Ausnehmung (21) die Gestalt eines Kreissegmentes hat und den Umfang zwischen einem halben und einem vollen Kreis umfaßt, und daß die Querschnittsfläche der Ausnehmung (21) im wesentlichen gleich der Querschnittsfläche der Leitung (22) ist.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jeder Fluid-Antrieb (17) mit einer Regeleinrichtung (20) versehen ist, um den Druck des fließfähigen Mediums im Antrieb unabhängig zu regeln.
EP19800901891 1979-10-01 1981-04-08 Schabergerät mit fluidumanpressvorrichtung für eine behandlungsvorrichtung mit geschabter oberfläche Expired EP0038807B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7924791A FR2466729B1 (fr) 1979-10-01 1979-10-01 Presseur fluidique d'organe de raclage pour appareil de traitement a surface raclee
FR7924791 1979-10-01

Publications (2)

Publication Number Publication Date
EP0038807A1 EP0038807A1 (de) 1981-11-04
EP0038807B1 true EP0038807B1 (de) 1985-01-16

Family

ID=9230334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800901891 Expired EP0038807B1 (de) 1979-10-01 1981-04-08 Schabergerät mit fluidumanpressvorrichtung für eine behandlungsvorrichtung mit geschabter oberfläche

Country Status (4)

Country Link
EP (1) EP0038807B1 (de)
DE (1) DE3069979D1 (de)
FR (1) FR2466729B1 (de)
WO (1) WO1981000905A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744203B1 (fr) * 1996-01-30 1998-04-30 J E Duprat Et Cie S A Ets Cylindre de sechage pourvu d'un ensemble de raclage
ES2158752B1 (es) 1998-07-16 2002-06-16 Hrs Spiratube S L Mejoras en intercambiadores termicos para tratamiento de liquidos.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR333581A (fr) * 1903-07-04 1903-11-28 James Robinson Hatmaker Perfectionnements dans les machines à sécher à cylindre
US1566358A (en) * 1924-09-05 1925-12-22 Vickerys 1920 Ltd Doctor for paper machines
US2077816A (en) * 1935-01-16 1937-04-20 Vickery Frederick William Doctor for paper making and like machines
FR1200271A (fr) * 1958-03-19 1959-12-21 D S T Pattern And Engineering Perfectionnements aux racloirs
US3358643A (en) * 1965-08-10 1967-12-19 Time Inc Means to bias resilient doctor blade
US3778861A (en) * 1972-06-26 1973-12-18 Lodding Engineering Corp Bladeholders for doctors and scrapers
US3866266A (en) * 1973-11-09 1975-02-18 Lodding Engineering Corp Self-adjusting doctor blades
NL7710318A (nl) * 1977-09-20 1979-03-22 Goudsche Machinefabriek Bv Walsdroger.

Also Published As

Publication number Publication date
EP0038807A1 (de) 1981-11-04
DE3069979D1 (en) 1985-02-28
FR2466729B1 (fr) 1986-09-05
FR2466729A1 (fr) 1981-04-10
WO1981000905A1 (fr) 1981-04-02

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