EP0453478A1 - Ejecteur avec arrivee peripherique du gaz propulseur - Google Patents

Ejecteur avec arrivee peripherique du gaz propulseur

Info

Publication number
EP0453478A1
EP0453478A1 EP90901918A EP90901918A EP0453478A1 EP 0453478 A1 EP0453478 A1 EP 0453478A1 EP 90901918 A EP90901918 A EP 90901918A EP 90901918 A EP90901918 A EP 90901918A EP 0453478 A1 EP0453478 A1 EP 0453478A1
Authority
EP
European Patent Office
Prior art keywords
ejector
insert
housing
propellent gas
nozzles
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Withdrawn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
EP90901918A
Other languages
German (de)
English (en)
Inventor
Svante Stenfors
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.)
ABB Stal AB
Original Assignee
ABB Stal AB
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 ABB Stal AB filed Critical ABB Stal AB
Publication of EP0453478A1 publication Critical patent/EP0453478A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/40—Feeding or discharging devices
    • B65G53/42—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators

Definitions

  • the invention relates to an ejector intended for a pneuma ⁇ tic transport device for particulate material, especially erosive material.
  • the diffusor is formed with nozzles 5 through which propellent gas is supplied peripherally in the flow channel of the ejector.
  • An ejector with peripheral supply of propellent gas in a pneumatic conveying pipe for particulate material is known TO from UK Patent Specification 2 002 312 A.
  • Ejectors with peripheral supply of propellent gas in nozzles for blasting and surface coating are known from European Patent Specifi ⁇ cation 0 189 709 and International Patent Application 0 86/02587, respectively.
  • One object of the invention is to provide an ejector with high power and low consumption of propellent gas. Another object is to give an ejector such a design that the erosion therein becomes insignificant.
  • the ejector is provided with a number of peripherally arranged nozzles around a central flow channel. These nozzles are formed from an ejector housing and and insert forming part of the flow channel in the ejector.
  • the ejector housing is formed with
  • a conical seat and the insert with an outer conical surface contiguous to the seat Suitably, recesses in the conical surface of the insert and the surrounding surface in the conical seat in the ejector housing form a nozzle channel.
  • the recess can be made in the seat of the ejector housing, which, however, is more complicated from the manufacturing point of view.
  • the nozzle channel From an inlet for propellent gas, the nozzle channel has a continuously increasing cross section and forms a diffusor where the propellent gas expands and attains a very high velocity which provides a great driving power.
  • Figure 1 shows a longitudinal section through an ejector
  • FIG. 2 a section according to A-A in Figure 1 ,
  • FIG. 3 shows a section at B-B in Figure 1
  • Figure 4 shows on an enlarged scale a portion of the sec ⁇ tion according to Figure 1 .
  • Figure 5 shows an extension of a conical insert, included in the ejector, with milled-out portions forming nozzles and diffusor channels.
  • 1 designates an ejector in a pneumatic transport device between an upstream suction pipe 2 and a downstream conveying pipe 3.
  • the ejector comprises an ejector housing 4 with a propellent gas inlet 5 and a sleeve-formed insert 6.
  • the housing 4 is formed with a conical seat 7 and the insert 6 with an external conical portion 6a adapted to the insert 6.
  • the sleeve or insert 6 is fixed with its flange 6b in the housing 4 by the suc- tion pipe 2.
  • the propellent gas channel 8 of the inlet 5 opens out into an- annular space 9 formed by an annular tur ⁇ ned cavity in the housing 4 and by the flange 6b of the sleeve/insert 6.
  • milled grooves are provided which together with the housing 4, which surrounds the sleeve 6, form flow channels 10.
  • the inlet 10a communicates with the annular space 9 and the outlet with the opening 11 in the housing 4.
  • These channels 10 have a cross section increasing from the inlet 10a towards the outlet 10b and form Laval nozzles where the gas, after the smallest cross section at the inlet, is accelerated by expansion to a very high velocity in the channel serving as a diffusor and provided downstream of the inlet.
  • This channel opens out at the periphery of the flow channel 11.
  • the high velocity of the propellent gas gives a very high driving power with a small quantity of gas.
  • the channels are suitably formed such that their centre line makes a certain angle of with a plane extending through the longitudinal axis of the ejector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

L'éjecteur décrit, qui est destiné à un système transporteur pneumatique et qui est pourvu de buses pour le gaz propulseur qui débouchent à la périphérie de l'éjecteur, comprend un logement (4) contenant une pièce rapportée conique (6). Des évidements ménagés dans la pièce rapportée et dans la surface circonvoisine du logement de l'éjecteur forment un canal (10) ayant une section transversale (diffuseur) qui décroît progressivement à partir d'une entrée (10a) pour le gaz propulseur, où le gaz propulseur subit une expansion et atteint une vitesse élevée. Ces canaux (10) débouchent à la périphérie dans le canal d'écoulement de l'éjecteur et forment les buses de l'éjecteur.
EP90901918A 1989-01-11 1990-01-10 Ejecteur avec arrivee peripherique du gaz propulseur Withdrawn EP0453478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8900076A SE462796B (sv) 1989-01-11 1989-01-11 Ejektor med perifer tillfoersel av drivgas
SE8900076 1989-01-11

Publications (1)

Publication Number Publication Date
EP0453478A1 true EP0453478A1 (fr) 1991-10-30

Family

ID=20374716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901918A Withdrawn EP0453478A1 (fr) 1989-01-11 1990-01-10 Ejecteur avec arrivee peripherique du gaz propulseur

Country Status (3)

Country Link
EP (1) EP0453478A1 (fr)
SE (1) SE462796B (fr)
WO (1) WO1990008083A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2517779B2 (ja) * 1990-05-18 1996-07-24 清之 堀井 コアンダスパイラルフロ―ユニット
US6368028B1 (en) 1997-09-03 2002-04-09 Exxonmobil Chemical Patents Inc. Conveying systems for compacted, friable solids
US6036407A (en) * 1997-09-03 2000-03-14 Exxon Chemical Patents Inc. Solids conveying system for compacted, friable solids that can not be pushed or compressed
AU8924298A (en) * 1998-09-23 2000-04-10 Exxon Chemical Patents Inc. Pneumatic conveying system for compacted, friable solids
US6894247B2 (en) * 2002-07-26 2005-05-17 Honeywell International, Inc. Powder feed splitter for hand-held laser powder fusion welding torch
RU2316463C1 (ru) * 2006-04-10 2008-02-10 Государственное образовательное учреждение высшего профессионального образования "Уральский государственный технический университет-УПИ",RU Устройство пневмотранспорта сыпучих материалов
WO2013009859A1 (fr) * 2011-07-11 2013-01-17 Williams Dwight D Tube de dosage d'accélérateur d'air
PE20142172A1 (es) * 2012-02-07 2015-01-08 Commw Scient Ind Res Org Reduccion de la friccion de un flujo viscoso en un conducto
KR101978982B1 (ko) * 2017-07-17 2019-05-15 장희수 물체 이송용 워터젯 이젝터
CN110562746B (zh) * 2019-09-30 2021-06-18 安徽百盛源包装材料有限公司 一种复膜机吸边丝气流调节装置
CN114086332A (zh) * 2020-08-24 2022-02-25 高林股份有限公司 缝纫机的残屑收集装置及其负压接头

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708207A (en) * 1971-04-16 1973-01-02 Dynamic Air High pressure booster valve
DE2516402A1 (de) * 1975-04-15 1976-10-28 Lutz Tilo Dipl Ing Kayser Vorrichtung zur kontinuierlichen druckfoerderung von feinstueckigem massengut
GB2099778B (en) * 1981-04-28 1985-02-27 Bigwood Joshua & Son Ltd Feeding station for pneumatic conveyors
US4771580A (en) * 1984-10-29 1988-09-20 Hardblast Australia Pty. Ltd. Nozzle for sand blasting
FR2575678B1 (fr) * 1985-01-04 1988-06-03 Saint Gobain Vitrage Ejecteur pneumatique de poudre
GB8628930D0 (en) * 1986-12-03 1987-01-07 Mccoll & Co Ltd K G Sand blasting

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9008083A1 *

Also Published As

Publication number Publication date
SE462796B (sv) 1990-09-03
SE8900076D0 (sv) 1989-01-11
WO1990008083A1 (fr) 1990-07-26

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Legal Events

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

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17P Request for examination filed

Effective date: 19910704

AK Designated contracting states

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Designated state(s): DE ES GB

17Q First examination report despatched

Effective date: 19921117

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18W Application withdrawn

Withdrawal date: 19930323