EP0407356A1 - Vorrichtung zum Absaugen von Resten, insbesondere für Maschinen zur Herstellung von Textilien - Google Patents

Vorrichtung zum Absaugen von Resten, insbesondere für Maschinen zur Herstellung von Textilien Download PDF

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Publication number
EP0407356A1
EP0407356A1 EP90830283A EP90830283A EP0407356A1 EP 0407356 A1 EP0407356 A1 EP 0407356A1 EP 90830283 A EP90830283 A EP 90830283A EP 90830283 A EP90830283 A EP 90830283A EP 0407356 A1 EP0407356 A1 EP 0407356A1
Authority
EP
European Patent Office
Prior art keywords
fluid conduit
section
waste
primary fluid
primary
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Withdrawn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
EP90830283A
Other languages
English (en)
French (fr)
Inventor
Ideo Caleffi
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.)
Esam SpA
Original Assignee
Esam SpA
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 Esam SpA filed Critical Esam SpA
Publication of EP0407356A1 publication Critical patent/EP0407356A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/86—Arrangements for taking-up waste material before or after winding or depositing
    • B65H54/88—Arrangements for taking-up waste material before or after winding or depositing by means of pneumatic arrangements, e.g. suction guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a device for the aspiration of waste, in particular for machinery used in the production of textiles.
  • the waste is constituted of continuous strands, it can be eliminated by being rolled around spools which, turning around their own axis, collect the waste in bobbins which can then be removed.
  • This kind of device apart from creating some discontinuity problems when full and the spools must be substituted, are in any case unable to eliminate short-length waste, or waste which breaks under the slightest pressure.
  • the present art embraces aspirators constituted of a closed container inside which, by means of a pump, a vacuum is created which aspirates the waste produced by the machine.
  • This type of device is able to aspirate both continuous strands and discontinous waste, but has the notable disadvantage of causing interruption of work whenever the container is full and must be substituted.
  • the containers required must be quite large and must be positioned in close proximity to the textile machine in order not to suffer from excessive lowering of vacuum levels with consequent difficulty of aspiration of waste due to the excessive length of the aspiration tube that aspires the waste and collects it in the container.
  • Aim of the present invention is to eliminate the above-described disadvantages by providing a device which permits of aspiration of waste of both good length and short length, which does not necessitate interruption in aspiration of the waste and therefore the consequent interruption of machine function, and which permits of the accumulation of waste at a notable distance from the actual machine.
  • An advantage of the device in question is represented by the fact that it may be installed to existing machines without difficulty.
  • the device comprises an ejector (1) provided with a secondary fluid conduit (2) and a primary fluid conduit (3).
  • the primary fluid conduit (3) is provided with several conduit sections, all arranged coaxially; precisely these are: the first section (3a); the second section (3b); the third section (3c); the fourth section (3d); the fifth section (3e); and the sixth section (3f).
  • the conduit is further provided with an inlet (4) arranged with its axis perpendicular to the primary fluid conduit (3), through which the pressurised primary fluid flow (M), usually air, coming from a blower not illustrated in the diagram, is directed into the primary fluid conduit (3).
  • M pressurised primary fluid flow
  • the first section (3a) on the primary fluid conduit (3) is conical and is convergent in the direction of the flow of the fluid;
  • the second section (3b) is cylindrical;
  • the third section (3c) is conical and is convergent in the direction of the flow of the fluid;
  • the fourth section (3d) is cylindrical;
  • the fifth section (3e) is conical and divergent with respect to the direction of the flow of the fluid;
  • the sixth section (3f) is cylindrical and has a larger diameter than the second section (3b).
  • the secondary fluid conduit (2) is cylinder-shaped and is arranged coaxially to the primary fluid conduit (3). Its first extremity (2a) is positioned in the immediate vicinity of the part of the machine which produces the waste; the second extremity (2b) of the secondary fluid conduit (2) is inserted coaxially in to the primary fluid conduit (3), in correspondence with the first section (3a) of the primary fluid conduit (3).
  • the external diameter of the secondary fluid conduit (2) and in particular of its extremity (2b) is inferior to the internal diameters of the conical section (3a) except for the diameters nearest to the lower base of said conical section (3a), which, for reasons that will be more fully explained below, has diameters which are slightly inferior to the external diameter of the extremity of section (2b).
  • the secondary fluid conduit (2) is mobile in an axial direction with respect to the primary fluid conduit (3), and in particular its extremity (2b) is mobile in an axial direction with respect to and inside the conical section (3a).
  • Means of fixing the secondary fluid conduit (2) in a plurality of positions with respect to the primary fluid conduit (3) are envisaged; such fixing means comprise a screw (6) which, to prevent sliding of the secondary fluid conduit (2), is screwed against said conduit (2) and which, when unscrewed so that it no longer has contact with said conduit (2), permits of sliding the conduit (2) inside a collar (5) whose lower part is fixed coaxially to the primary fluid conduit (3).
  • An annular gap is created between the extremity (2b) of the secondary fluid conduit (2) and the internal wall of section (3a) whose radial breadth can be varied simply by varying the position of the secondary fluid conduit (2) with respect to the primary fluid conduit (3).
  • the diameters of extremity (2b) and section (3a) are such that the breadth of the gap can be reduced to nothing, even if this never actually happens during functioning of the device.
  • the fluid that enters through the inlet (4) crosses the above-described annular gap, raising considerably its kinetic energy and thus causing aspiration inside the secondary fluid conduit (2) by means of the Venturi effect.
  • the secondary fluid conduit (2) is slotted airtight into the collar (5) in such a way as to avoid primary fluid escape from the lower part of the ejector.
  • the mixture of primary and secondary fluid containing the waste which is thus formed in section (3b) of the primary fluid conduit (3) proceeds along said conduit (3), borne by the kinetic energy of the primary fluid and leaves the ejector at the point indicated by arrow S.
  • a further conduit can be applied, of considerable length if necessary, which can carry the mixture of fluids containing the waste, to a location at a great distance, if required, from the machine itself.
  • the particular conformation of the primary fluid conduit (3), and in particular the sequence of sections (3b, 3c, 3d, 3e, and 3f) which cause successive transformations of the relationship between the velocity and the pressure of the fluid mixture, permit of obtaining an optimisation of the volume of secondary fluid aspirated in relation to the volume of and energy possessed by the primary fluid.
  • the device which has been described in particular for the aspiration of waste material from machinery used in the production of textiles, can be used also for the aspiration of other kinds of waste, as long as it has analogous characteristics with regard to size and weight to the waste produced in the production of textiles.

Landscapes

  • Jet Pumps And Other Pumps (AREA)
EP90830283A 1989-07-07 1990-06-25 Vorrichtung zum Absaugen von Resten, insbesondere für Maschinen zur Herstellung von Textilien Withdrawn EP0407356A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4011389 1989-07-07
IT8940113A IT1233583B (it) 1989-07-07 1989-07-07 Dispositivo per l'aspirazione di sfridi di lavorazione, in particolare per macchine tessili

Publications (1)

Publication Number Publication Date
EP0407356A1 true EP0407356A1 (de) 1991-01-09

Family

ID=11248355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830283A Withdrawn EP0407356A1 (de) 1989-07-07 1990-06-25 Vorrichtung zum Absaugen von Resten, insbesondere für Maschinen zur Herstellung von Textilien

Country Status (2)

Country Link
EP (1) EP0407356A1 (de)
IT (1) IT1233583B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564958A (en) * 1967-07-17 1971-02-23 Leesona Corp Yarn handling apparatus
EP0146898A2 (de) * 1983-12-15 1985-07-03 Toray Industries, Inc. Verfahren zum Einfädeln eines Fadens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564958A (en) * 1967-07-17 1971-02-23 Leesona Corp Yarn handling apparatus
EP0146898A2 (de) * 1983-12-15 1985-07-03 Toray Industries, Inc. Verfahren zum Einfädeln eines Fadens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 300 (M-433)(2023) 27 November 1985, & JP-A-60 137776 (TORAY) 22 July 1985, *

Also Published As

Publication number Publication date
IT8940113A0 (it) 1989-07-07
IT1233583B (it) 1992-04-03

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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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Designated state(s): CH DE ES FR GB LI

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Effective date: 19910507

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Effective date: 19921207

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18D Application deemed to be withdrawn

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