EP0271258A2 - Dispositif pour projeter du matériau granulaire ou particulaire - Google Patents

Dispositif pour projeter du matériau granulaire ou particulaire Download PDF

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Publication number
EP0271258A2
EP0271258A2 EP87310432A EP87310432A EP0271258A2 EP 0271258 A2 EP0271258 A2 EP 0271258A2 EP 87310432 A EP87310432 A EP 87310432A EP 87310432 A EP87310432 A EP 87310432A EP 0271258 A2 EP0271258 A2 EP 0271258A2
Authority
EP
European Patent Office
Prior art keywords
air
nozzle
air gap
flow
bleed
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Withdrawn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
EP87310432A
Other languages
German (de)
English (en)
Other versions
EP0271258A3 (fr
Inventor
Leonard James Bye
Steven Alan Small
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
Westinghouse Brake and Signal Holdings Ltd
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 Westinghouse Brake and Signal Co Ltd, Westinghouse Brake and Signal Holdings Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Publication of EP0271258A2 publication Critical patent/EP0271258A2/fr
Publication of EP0271258A3 publication Critical patent/EP0271258A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/461—Adjustable nozzles

Definitions

  • the present invention relates to a device for ejecting granular or particulate material.
  • Devices for ejecting granular or particulate material from supply means for such material are known in the form of an elongate device through which the material flows, the device including a nozzle for the material, the nozzle defining an air gap in the device, to which gap air is supplied whereby as a result of the Venturi effect created in the device, the flow of material through the device is enhanced or enabled.
  • a device for ejecting granular or particulate material from supply means comprising an elongate body for through flow of the material, a nozzle defining within the body an air gap, and means whereby air can be supplied to the air gap and as a result of the Venturi effect created thereby in the device flow of material through the device is enhanced or enabled, characterised in that the device is provided with a bleed arrangement for bleeding air to the material from the supply to the air gap before the material reaches the air gap. Bleeding air from the supply to the air gap to the material before it reaches the air gap can improve the flow of material through the device.
  • reference numeral 1 designates an annular flange plate at an input end bolted to an annular flange connector 2 which is itself fastened by screws to a hollow body 3 having an air inlet 4 in a portion 5 of body 3 for connection to a source of compressed air.
  • Body 3 is fastened by screws to a throat body 6 which is itself connected to a flared, diffuser body 7 via a locking nut 8 and a compression sleeve 9.
  • Inside the body 3 is an elongate nozzle 10 defining at its innermost end an annular gap between itself and the inside face of body 6. This gap is adjustable in a manner which will be explained below, by adjusting longitudinally the position of the nozzle 10, reference numeral 11 designating an O-ring seal between nozzle 10 and body 3.
  • the input end is coupled to the output of a device from which granular or particulate material is fed, for example a hopper supplied with such material.
  • the material flows through the nozzle 10 and then through and out of the diffuser body 7 for subsequent handling of the material.
  • the flow of the material is enabled or enhanced by supplying compressed air into inlet 4, this air emanating into the nozzle 10 through the annular gap between the innermost end of nozzle 10 and the inside face of body 6.
  • the Venturi effect created where the air emanates from the annular gap the air laden with the granular or particulate material is sucked through nozzle 10 and into diffuser body 7.
  • the nozzle 10 may be adjusted as regards its longitudinal position, to adjust the annular gap between its innermost end and the inner face of body 6 to achieve optimum flow of material.
  • the body 3 is formed with a slot 12 through it, extending obliquely across the longitudinal axis of the ejecting device; and the nozzle 10 has two blind holes 13 and 14, these blind holes being spaced 60° apart circumferentially.
  • a bar 15 is inserted into the blind hole 13 (see Figure 3) and rotated in an anti-clockwise direction in Figure 3.
  • the bar 15 slides in slot 12 and, due to the latter being oblique, the nozzle 10 is pulled towards the left in Figure 1.
  • the blind hole 14 appears under the above-mentioned one end of slot 12.
  • the bar 15 may be inserted into the blind hole 14 and rotated again in an anti-clockwise direction in Figure 3, to pull the nozzle 10 further to the left in Figure 1.
  • the bar 15 is again at the other end of slot 12, and the nozzle 10 has rotated a total of 120° and has been pulled in total from the position shown in Figure 1 to a position in which its left hand end in Figure 1 (i.e. its outermost end) is at the junction of flange plate 1 and connector 2, as shown by a broken line in Figure 1, and the annular gap is as large as permissible.
  • the annular gap is set to a value which achieves optimum flow of material by adjustment of nozzle 10, the latter then being locked in place by a grub-screw 16 passing through body 3.
  • Reference numeral 17 denotes a scale marked on the outside of body 3, for use in resetting the nozzle to a desired position with reference to its innermost position.
  • reference numeral 18 designates the body arrangement 3/6/7 of the ejecting device
  • reference numeral 19 designates a compressed air line feeding inlet 4
  • reference numeral 20 denotes a hopper for feeding material to the body arrangement 3/6/7 of the device 18 via an input chamber 21.
  • line 22 connected between line 19 and chamber 21 via an adjustable throttle in the form of a tap 23 for controlling the degree of air "bleed". It has been found that providing such a "bleed" of air to the material can improve the flow of material through the device 18.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Air Transport Of Granular Materials (AREA)
EP87310432A 1986-12-11 1987-11-26 Dispositif pour projeter du matériau granulaire ou particulaire Withdrawn EP0271258A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8629647 1986-12-11
GB08629647A GB2198479A (en) 1986-12-11 1986-12-11 Ejecting granular or particulate material

Publications (2)

Publication Number Publication Date
EP0271258A2 true EP0271258A2 (fr) 1988-06-15
EP0271258A3 EP0271258A3 (fr) 1988-10-05

Family

ID=10608857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310432A Withdrawn EP0271258A3 (fr) 1986-12-11 1987-11-26 Dispositif pour projeter du matériau granulaire ou particulaire

Country Status (2)

Country Link
EP (1) EP0271258A3 (fr)
GB (1) GB2198479A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013072410A1 (fr) 2011-11-16 2013-05-23 Basf Se Injecteur pour un solide granulaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2180410C2 (ru) * 2000-04-14 2002-03-10 Волгоградский государственный технический университет Струйный насос
RU2353820C1 (ru) * 2008-01-09 2009-04-27 Открытое акционерное общество "Северо-Кавказский научно-исследовательский проектный институт природных газов" (ОАО "СевКавНИПИгаз") Эжектор

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE444471C (de) * 1926-02-26 1927-05-21 Kohlenstaub Ges Mit Beschraenk Verfahren zum Foerdern von Kohlenstaub
FR677735A (fr) * 1929-07-02 1930-03-13 Pneumatic Conveyance & Extract Appareils de manutention pneumatique de matières solides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013072410A1 (fr) 2011-11-16 2013-05-23 Basf Se Injecteur pour un solide granulaire

Also Published As

Publication number Publication date
EP0271258A3 (fr) 1988-10-05
GB8629647D0 (en) 1987-01-21
GB2198479A (en) 1988-06-15

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Owner name: WESTINGHOUSE BRAKE AND SIGNAL HOLDINGS LIMITED

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Effective date: 19890406

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Inventor name: BYE, LEONARD JAMES

Inventor name: SMALL, STEVEN ALAN