EP0410544A1 - Méthode et appareil de dosage pour débiter un liquide - Google Patents

Méthode et appareil de dosage pour débiter un liquide Download PDF

Info

Publication number
EP0410544A1
EP0410544A1 EP90202051A EP90202051A EP0410544A1 EP 0410544 A1 EP0410544 A1 EP 0410544A1 EP 90202051 A EP90202051 A EP 90202051A EP 90202051 A EP90202051 A EP 90202051A EP 0410544 A1 EP0410544 A1 EP 0410544A1
Authority
EP
European Patent Office
Prior art keywords
passage
liquid
chamber
plunger
dosaging
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Withdrawn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
EP90202051A
Other languages
German (de)
English (en)
Inventor
Robertus Augustinus Maria Jansen
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.)
Stonemac BV
Original Assignee
Stonemac BV
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 Stonemac BV filed Critical Stonemac BV
Publication of EP0410544A1 publication Critical patent/EP0410544A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles

Definitions

  • the invention relates to a method for delivering a liquid from a chamber via a passage which can be closed by a closing means.
  • the delivery in a desired quantity or the dosing of a liquid via a closable passage is largely determined by the reologic behaviour or flowing behaviour of the liquid.
  • Said reologic behaviour of the liquid is influenced by the viscosity, the thixotrophy and the flowing point of the liquid.
  • Said three properties determine the so-called "shortness" of a liquid, i.e. the time it takes to put a liquid from a flowing condition into a stationary condition.
  • the object of the invention is to obtain a method wherein said problem can be easily overcome.
  • a further aspect of the invention relates to a dosaging device for delivering a liquid, said dosaging device in particular being suitable for carrying out a method according to the invention, whereby said dosaging device is provided with a chamber having a passage which can be closed by means of a closing means, means being provided according to the invention by way of which parts of the device being in contact with liquid present in the chamber can be set into vibration.
  • the liquid can be set in motion in a simple manner when the closing means is opened, such that the liquid will flow out of the passage in a regular manner as soon as the passage has been opened by the closing means.
  • the installation illustrated in Figure 1 is in particular intended for delivering so-called short liquids, such as e.g. dye used in the printing industry, in a dosed manner.
  • short liquids such as e.g. dye used in the printing industry
  • the installation comprises a vessel 1 containing the liquid to be dosed.
  • a suction pipe 2 extends into said vessel, which is connected to a pump 3.
  • a stop valve 4 In the suction pipe there is accommodated a stop valve 4.
  • the pump 3 can be driven in a usual manner by means of a motor 3′.
  • the delivery side of the pump 3 is connected to a dosaging device 6 via a pressure pipe 5.
  • a filter 7 As well as a retaining valve 8, which prevents a reflux of the liquid from the dosaging device to the pump.
  • bypass 9 Upstream and downstream of the filter 7 a bypass 9 is connected to the pressure pipe 5, in which bypass there is accommodated a check valve 10. Said check valve 10 will open when for some reason the filter does not pass any liquid, e.g. when the filter 7 has become clogged.
  • the pressure pipe 5 opens into a chamber 11, which is recessed in a casing 12 forming part of the dosaging device.
  • a discharge pipe 13 To said chamber 11 there is furthermore connected a discharge pipe 13.
  • the end of the discharge pipe 13 remote from the dosaging device 6 opens into the vessel 1 via a constriction 14.
  • a check valve 15 In the return line 13 there is furthermore provided a check valve 15.
  • the valve 15 prevents that the pipe 13 empties when the vessel 1 is being exchanged.
  • a pair of dosaging nipples 16 and 17 is provided in a wall of the casing 12.
  • the diameter of the bore 18 in the nipple 16 is comparatively large and can be closed by means of a valve disc 19, which is secured to the end of a valve stem 20.
  • valve stem 20 projecting from the casing 12 is surrounded by a compression spring 21, which is retained by a valve disc 22 fixed to the valve stem and a support plate 23 supporting the casing 12, all this in such a manner that the spring 21 attempts to keep the valve disc 19 in a position closing the nipple 16 as illustrated in Figure 2.
  • valve stem 20 remote from the valve disc 19 is coupled, by means of a head piece 24, to a sliding piece 25, which is in turn coupled to the piston rod 26 of a setting cylinder 27.
  • a sliding piece 25 By moving the sliding piece 25 by means of the setting cylinder 27 to the right, when seen in Figure 2, the valve disc 19 will likewise be moved to the right, and thus effect an open communication between the passage 18, through the nipple 16, and the chamber 11.
  • the diameter of the stepped passage 28 provided in the nipple 17 is considerably smaller than the diameter of the passage 18 provided in the nipple 16.
  • the nipple 17 cooperates with a plunger 29, whose boundary plane directed towards the nipple 17 cooperates with a collar 30 of the nipple forming a seat.
  • a pin 31 being integral with the plunger joins up with the end of the plunger, said pin fitting the stepped bore 28, as is illustrated in Figure 2.
  • the plunger 29 is surrounded by a compression spring 32 in a similar manner as the piston rod 20, which compression spring attempts to keep the plunger 29 in the position illustrated in Figure 2, in which position the passage 28 through the nipple 17 is closed by means of the plunger 29.
  • the plunger 29 is furthermore connected to a sliding piece 34 by means of a head piece 33.
  • the end of the sliding piece 34 remote from the head piece 33 is connected to one end of a vibrating device 35.
  • the other end of the vibrating device is coupled, by means of a connecting bracket 36 and a buffer 37, to a pair of setting cylinders 38 and 39 connected one behind the other.
  • the construction is thereby such that by only operating the setting cylinder 38 the plunger 29 is moved to the right, when seen in Figure 2, along such a distance that part of the length of the pin 31 being integral with the plunger 29 is still inserted in the passage 28 provided in the nipple 17, so that in this position liquid can only flow out of the chamber 11, via the passage 28, by way of the clearance space between the pin 31 and the bore 28.
  • the passage 18 in the nipple 16 can be released by moving the piston rod 20 and the valve 19 fixed thereto to the right, when seen in Figure 2, by means of the setting cylinder 27.
  • the diameter of the passage 18 is thereby such that also so-called short liquids can flow out of said passage without any problems, under the influence of the pressure present in the chamber 11.
  • the passage 18 in the nipple 16 can be closed again by means of the valve disc 19, whilst the passage in the nipple 17 is being released.
  • the procedure will usually be such that first the pin 31 secured to the plunger 29 is retracted from the passage 28, in order to partially move back into the passage 28 again during the last discharging stage, so that the discharge is then determined by the clearance passage between the pin 31 and the part of the hole 38 having the smallest diameter.

Landscapes

  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Reciprocating Pumps (AREA)
EP90202051A 1989-07-27 1990-07-26 Méthode et appareil de dosage pour débiter un liquide Withdrawn EP0410544A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8901944 1989-07-27
NL8901944A NL8901944A (nl) 1989-07-27 1989-07-27 Werkwijze en doseerinrichting voor het afgeven van vloeistof.

Publications (1)

Publication Number Publication Date
EP0410544A1 true EP0410544A1 (fr) 1991-01-30

Family

ID=19855113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202051A Withdrawn EP0410544A1 (fr) 1989-07-27 1990-07-26 Méthode et appareil de dosage pour débiter un liquide

Country Status (2)

Country Link
EP (1) EP0410544A1 (fr)
NL (1) NL8901944A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022137A1 (fr) * 1998-12-22 2000-07-26 Heidelberger Druckmaschinen Aktiengesellschaft Dosification numérique d'encre

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996928A (en) * 1957-11-25 1961-08-22 Orla E Watson Valve operator
GB2074240A (en) * 1980-04-03 1981-10-28 Gd Spa Distributor device for viscous materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996928A (en) * 1957-11-25 1961-08-22 Orla E Watson Valve operator
GB2074240A (en) * 1980-04-03 1981-10-28 Gd Spa Distributor device for viscous materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022137A1 (fr) * 1998-12-22 2000-07-26 Heidelberger Druckmaschinen Aktiengesellschaft Dosification numérique d'encre

Also Published As

Publication number Publication date
NL8901944A (nl) 1991-02-18

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