EP0197575B1 - A method and apparatus for dispensing a viscous liquid, using a valve - Google Patents

A method and apparatus for dispensing a viscous liquid, using a valve Download PDF

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Publication number
EP0197575B1
EP0197575B1 EP19860200381 EP86200381A EP0197575B1 EP 0197575 B1 EP0197575 B1 EP 0197575B1 EP 19860200381 EP19860200381 EP 19860200381 EP 86200381 A EP86200381 A EP 86200381A EP 0197575 B1 EP0197575 B1 EP 0197575B1
Authority
EP
European Patent Office
Prior art keywords
outlet
valve
valve member
liquid
shoulder
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
EP19860200381
Other languages
German (de)
French (fr)
Other versions
EP0197575A1 (en
Inventor
Jan Marcus Van Koeveringe
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.)
Exter Holding BV
Original Assignee
Exter Holding 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 Exter Holding BV filed Critical Exter Holding BV
Publication of EP0197575A1 publication Critical patent/EP0197575A1/en
Application granted granted Critical
Publication of EP0197575B1 publication Critical patent/EP0197575B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
    • B65B39/001—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers with flow cut-off means, e.g. valves
    • B65B39/004—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers with flow cut-off means, e.g. valves moving linearly

Definitions

  • This invention relates to a method for dispensing a viscous liquid, using a valve comprising a body having an inlet and an outlet and a valve member movable perpendicularly to the plane of said outlet, wherein as soon as the entire desired quantity of liquid has passed the outlet the valve member is moved to the outlet at such a velocity, that by suddenly decelerating upon closing the outlet the last quantity of liquid is pushed through the outlet.
  • the bottom surface thereof in the end position of the valve member, is coplanar with the end of the outlet and the outlet is fully filled up and the liquid will be fully released from the valve member.
  • valve member can be decelerated with a shock or optionally shockwise in a plurality of steps, whereas the liquid continues to advance under the influence of inertia. As the desired quantity of liquid is forced through the outlet as one whole, no liquid will cling to the wall of the outlet.
  • the liquid is pushed outward in the vertical, downward direction.
  • the amount of liquid is released from the decelerated valve member not only on the basis of inertia, but in addition by gravity.
  • the invention further relates to an apparatus for carrying out the methods according to the invention, comprising a valve including a body having an inlet and an outlet and a valve member adapted to close said outlet and movable perpendicularly to the plane of the outlet, wherein the valve member includes a shoulder which in the closed condition of the valve is in contact with the valve seat of the outlet and which construction is characterized in that the form and dimensions of the valve member correspond to those of the outlet, so that, in the closed end position of the valve, the bottom surface of the valve member is co-planar with the end of the outlet and the outlet is fully filled up. In this way no liquid can remain behind in the outlet.
  • the shoulder of the valve member strikes the seat, so that the valve member is abruptly stopped. As a consequence, the contact between the valve member and the liquid is broken, so that the liquid is moved along into the container and does not cling to the valve, thus preventing the latter from starting to drip, as no liquid can be present between the valve member and the valve seat.
  • the transition between the shoulder and the valve member is rounded, and the associated part of the valve seat is similarly rounded.
  • the result of this rounding is that the valve member is centred as it is pushed into the outlet. As it is further pushed through the outlet, the valve member will then come to lie in proper sealing relationship with the inner wall of the outlet. As the valve member moves into the outlet, liquid present between the valve member or the shoulder and the valve seat is pushed back into the valve along the rounded surfaces, so that, in the closed condition of the valve, no liquid can be present between the valve member and the valve seat.
  • the valve member may be made of polytetrafluoroethylene.
  • the valve seat may be made of stainless steel, which can easily be cleaned. Such a combination of polytetrafluoroethylene and stainless steel additionally provides for proper guideance of the valve member in the outlet.
  • valve comprising a body 1 with an inlet 2 and an outlet 3.
  • the outlet can be closed by a valve member 4 having a shoulder 5.
  • Shoulder 5 rests upon a valve seat 6.
  • the valve seat has a rounded edge and terminates in a portion defining the outlet 3.
  • Valve member 4 is coupled at the top to a driving rod 7.
  • the valve member can be fixedly connected to the driving rod, for example, by means of bolt 8 via bores 9, 10 and 11 (see Fig. 2).
  • rod 7 is mounted for axial movement by means of a bearing 12 provided with seals 16 and 17.
  • the axial movement of the driving rod can be effected with a pneumatic driving system 13 arranged above the valve.
  • driving rod 7 is connected to two cylinders 14 and 15, arranged in series, and together providing for a stepped length of stroke of driving rod 7.
  • the driving system is shut off from its surroundings by a cover 18.
  • valve member 4 When liquid has to be dispensed, for example, a container should be filled, valve member 4 will be raised under the influence of cylinders 14 and 15 and driving rod 7. Liquid can then enter valve 1 through inlet 2 and leave it through outlet 3. When the desired quantity to be withdrawn has almost been reached, valve member 4 is moved downwards at a high velocity by means of cylinders 14 and 15 and driving rod 7. During this movement, the last amount of liquid will be pushed by the valve member through the outlet 3 as a lump. At the moment when all liquid has been pushed through the outlet, and the bottom surface of valve 4 is co-planar with the outlet end, shoulder 5 strikes seat 6 with some force.
  • valve member is instantaneously stopped, while-the contact between the liquid and the valve member is broken as a result of the inertia of the liquid.
  • valve member 4 As the valve member enters the outlet, it is centered to some extent by the rounded edges of valve seat 6. Subsequently, valve member 4 will come to lie in contact with the valve seat, and any liquid remaining between valve seat 6 and valve member 4 will be forced back into the valve until shoulder 5 is in contact with valve seat 6 and no liquid is left between valve member 4 and valve seat 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)

Description

  • This invention relates to a method for dispensing a viscous liquid, using a valve comprising a body having an inlet and an outlet and a valve member movable perpendicularly to the plane of said outlet, wherein as soon as the entire desired quantity of liquid has passed the outlet the valve member is moved to the outlet at such a velocity, that by suddenly decelerating upon closing the outlet the last quantity of liquid is pushed through the outlet.
  • In the prior art methods and apparatuses (see i.e. DE-A-2,819,245), use is made of a seal ring or washer which normally consists of elastic material (see also the used hatching). This implies that when closing the valve, a resiling will occur. Further the construction is so that in the closed end position the valve member will not fully fill up the outlet, so that the valve becomes fouled and starts dripping, when containers are changed thereby causing fouling of the container and the base on which it rests. This requires thorough cleaning of the valve, the container and the base. This need is even greater in those cases in which perishable materials are handled. Consequently, in the methods and apparatuses of the prior art, a considerable amount of additional work and hence, a considerable amount of additional cost are entailed in maintaining adequate standards of cleanliness and hygiene.
  • It is an object of the present invention to overcome these drawbacks.
  • According to the present invention in the end position of the valve member, the bottom surface thereof is coplanar with the end of the outlet and the outlet is fully filled up and the liquid will be fully released from the valve member.
  • In a further elaboration of the invention the valve member can be decelerated with a shock or optionally shockwise in a plurality of steps, whereas the liquid continues to advance under the influence of inertia. As the desired quantity of liquid is forced through the outlet as one whole, no liquid will cling to the wall of the outlet.
  • Preferably, the liquid is pushed outward in the vertical, downward direction. As a consequence, the amount of liquid is released from the decelerated valve member not only on the basis of inertia, but in addition by gravity.
  • The invention further relates to an apparatus for carrying out the methods according to the invention, comprising a valve including a body having an inlet and an outlet and a valve member adapted to close said outlet and movable perpendicularly to the plane of the outlet, wherein the valve member includes a shoulder which in the closed condition of the valve is in contact with the valve seat of the outlet and which construction is characterized in that the form and dimensions of the valve member correspond to those of the outlet, so that, in the closed end position of the valve, the bottom surface of the valve member is co-planar with the end of the outlet and the outlet is fully filled up. In this way no liquid can remain behind in the outlet. At the same moment, the shoulder of the valve member strikes the seat, so that the valve member is abruptly stopped. As a consequence, the contact between the valve member and the liquid is broken, so that the liquid is moved along into the container and does not cling to the valve, thus preventing the latter from starting to drip, as no liquid can be present between the valve member and the valve seat.
  • Preferably, the transition between the shoulder and the valve member is rounded, and the associated part of the valve seat is similarly rounded. The result of this rounding is that the valve member is centred as it is pushed into the outlet. As it is further pushed through the outlet, the valve member will then come to lie in proper sealing relationship with the inner wall of the outlet. As the valve member moves into the outlet, liquid present between the valve member or the shoulder and the valve seat is pushed back into the valve along the rounded surfaces, so that, in the closed condition of the valve, no liquid can be present between the valve member and the valve seat.
  • In order to prevent, as much as possible, that any liquid clings to the valve member, the valve member may be made of polytetrafluoroethylene. Furthermore, the valve seat may be made of stainless steel, which can easily be cleaned. Such a combination of polytetrafluoroethylene and stainless steel additionally provides for proper guideance of the valve member in the outlet.
  • One embodiment of the invention will now be desribed, by way of example, with reference to the accompanying drawings. In said drawings:
    • Fig. 1 shows a valve with a drive and control unit for the valve member present in the'valve; and
    • Fig. 2 shows a detail of the valve member according to the invention.
  • Referring to the drawings, there is shown a valve comprising a body 1 with an inlet 2 and an outlet 3. The outlet can be closed by a valve member 4 having a shoulder 5. Shoulder 5 rests upon a valve seat 6. The valve seat has a rounded edge and terminates in a portion defining the outlet 3. In the closed position of the valve, valve member 4 fills the entire outlet 3, while the rounding between shoulder 5 and valve member 4 is in contact with the rounded edge of the valve seat. Valve member 4 is coupled at the top to a driving rod 7. The valve member can be fixedly connected to the driving rod, for example, by means of bolt 8 via bores 9, 10 and 11 (see Fig. 2).
  • At the top of the body, rod 7 is mounted for axial movement by means of a bearing 12 provided with seals 16 and 17. The axial movement of the driving rod can be effected with a pneumatic driving system 13 arranged above the valve. For this purpose, driving rod 7 is connected to two cylinders 14 and 15, arranged in series, and together providing for a stepped length of stroke of driving rod 7. The driving system is shut off from its surroundings by a cover 18.
  • When liquid has to be dispensed, for example, a container should be filled, valve member 4 will be raised under the influence of cylinders 14 and 15 and driving rod 7. Liquid can then enter valve 1 through inlet 2 and leave it through outlet 3. When the desired quantity to be withdrawn has almost been reached, valve member 4 is moved downwards at a high velocity by means of cylinders 14 and 15 and driving rod 7. During this movement, the last amount of liquid will be pushed by the valve member through the outlet 3 as a lump. At the moment when all liquid has been pushed through the outlet, and the bottom surface of valve 4 is co-planar with the outlet end, shoulder 5 strikes seat 6 with some force.
  • As a consequence, the valve member is instantaneously stopped, while-the contact between the liquid and the valve member is broken as a result of the inertia of the liquid.
  • As the valve member enters the outlet, it is centered to some extent by the rounded edges of valve seat 6. Subsequently, valve member 4 will come to lie in contact with the valve seat, and any liquid remaining between valve seat 6 and valve member 4 will be forced back into the valve until shoulder 5 is in contact with valve seat 6 and no liquid is left between valve member 4 and valve seat 6.

Claims (5)

1. A method of dispensing a viscous liquid, using a valve comprising a body having an inlet and an outlet and a valve member movable perpendicularly to the plane of said outlet, wherein as soon as the entire desired quantity of liquid has passed the outlet the valve member is moved to the outlet at such a velocity, that by suddenly decelerating upon closing the outlet the last quantity of liquid is pushed through the outlet, characterized in that in the end position of the valve member, the bottom surface thereof is coplanar with the end of the outlet and the outlet is fully filled up and the liquid will be fully released from the valve member.
2. A method as claimed in claim 1, characterized in that the valve member is decelerated shockwise in a plurality of steps.
3. A method as claimed in claim 1 or 2, characterized in that the liquid is pushed outward in the vertical, downward direction.
4. Apparatus for carrying out any of the methods as claimed in the preceding claims, comprising a valve including a body having an inlet and an outlet and a valve member adapted to close said outlet and movable perpendicularly to the plane of the outlet, wherein the valve member includes a shoulder which in the closed condition of the valve is in contact with the valve seat of the outlet characterized in that the form and dimensions of the valve member correspond to those of the outlet, so that, in the closed position of the valve, the bottom surface of the valve member is co-planar with the end of the outlet and the outlet is fully filled up.
5. Apparatus as claimed in claim 4, characterized in that the transition between shoulder and valve member is rounded and that the associated part of the valve seat is similarly rounded.
EP19860200381 1985-03-11 1986-03-10 A method and apparatus for dispensing a viscous liquid, using a valve Expired EP0197575B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8500680 1985-03-11
NL8500680A NL8500680A (en) 1985-03-11 1985-03-11 METHOD AND APPARATUS FOR FILLING A PACK WITH A VISCOUS FLUID BY USING A VALVE.

Publications (2)

Publication Number Publication Date
EP0197575A1 EP0197575A1 (en) 1986-10-15
EP0197575B1 true EP0197575B1 (en) 1989-01-04

Family

ID=19845656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860200381 Expired EP0197575B1 (en) 1985-03-11 1986-03-10 A method and apparatus for dispensing a viscous liquid, using a valve

Country Status (4)

Country Link
EP (1) EP0197575B1 (en)
JP (1) JPS61274173A (en)
DE (1) DE3661609D1 (en)
NL (1) NL8500680A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2585247Y2 (en) * 1992-03-12 1998-11-18 四国化工機株式会社 Liquid metering nozzle
GB2319326B (en) * 1996-11-11 2001-05-09 Unilever Plc Dosing apparatus and method
IT1289515B1 (en) * 1996-12-23 1998-10-15 Ronchi Mario Srl Officine Mecc VALVE WITH SHUTTER WITH CONTROLLED OPERATION FOR DOSED DISPENSING OF FLUIDS IN AUTOMATIC CONTAINER FILLING MACHINES
JP3842870B2 (en) * 1997-07-11 2006-11-08 Ｓｍｃ株式会社 On-off valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE352091C (en) * 1916-07-20 1922-04-24 Borden Co Machine for measuring and filling liquids
DE2819245A1 (en) * 1978-05-02 1979-11-15 Hick & Co Gmbh Metering equipment for filling machine - has control piston shutting passage for material to be dispensed and regulating changeover between inlet and outlet

Also Published As

Publication number Publication date
NL8500680A (en) 1986-10-01
EP0197575A1 (en) 1986-10-15
JPS61274173A (en) 1986-12-04
DE3661609D1 (en) 1989-02-09

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