EP4551908A1 - Dispositif de dosage pourvu d'une soupape à boisseau - Google Patents

Dispositif de dosage pourvu d'une soupape à boisseau

Info

Publication number
EP4551908A1
EP4551908A1 EP23735289.3A EP23735289A EP4551908A1 EP 4551908 A1 EP4551908 A1 EP 4551908A1 EP 23735289 A EP23735289 A EP 23735289A EP 4551908 A1 EP4551908 A1 EP 4551908A1
Authority
EP
European Patent Office
Prior art keywords
valve body
valve
dosing device
seat
axial
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.)
Pending
Application number
EP23735289.3A
Other languages
German (de)
English (en)
Inventor
Harald Müller
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.)
Scheugenpflug GmbH
Original Assignee
Scheugenpflug GmbH
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 Scheugenpflug GmbH filed Critical Scheugenpflug GmbH
Publication of EP4551908A1 publication Critical patent/EP4551908A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/021—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005—Valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/12—Cleaning arrangements; Filters

Definitions

  • the invention relates to dispensers, in particular piston dispensers, for pasty materials with a valve, in particular an outlet valve.
  • the inlet line and/or the outlet line must generally be closable by a valve.
  • a metering cylinder which receives the desired metering quantity when the metering piston is retracted, the respective, usually pasty, material is drawn in from a storage container via a connected inlet line by pulling back the metering piston or flows into the metering cylinder due to gravity and the metering cylinder is filled.
  • the dosing quantity contained in the dosing cylinder is then metered out by pushing the dosing piston forward and feeding it via an outlet line to the desired outlet opening, usually a nozzle or an upstream mixing tube.
  • an inlet valve is usually installed in each inlet line and an outlet valve, usually I/O valves, in each outlet line to help when filling the Dosing cylinder to keep the outlet line closed and to keep the inlet line closed when dispensing towards the outlet opening.
  • the inlet and outlet valves are often designed as membrane valves, in which the component to be metered is only on one side of the membrane, which can be pressed against a sealing surface from the other side of the membrane by means of a locking cylinder in order to regulate the flow through the valve for the material. Since the material flows only slightly along the surface of the membrane, wear is low even with abrasive material.
  • the dosing becomes too imprecise, as the membrane can stretch slightly due to age or change its rigidity and thus the dosing volume can change.
  • a plug valve is understood to mean a valve in which a particularly truncated cone-shaped or cylindrical valve body is arranged pivotably about its axial direction in a base body or a valve body with any cross-section axially, transversely to the direction of the passage channel penetrating it for the material in a base body can be tightly moved back and forth, in each case to such an extent that the mouths of the passage channel on the one hand at least partially overlap with the adjoining extension channels (open position) or completely without overlapping with the adjoining extension channels (closed position).
  • Both the base body and the valve body have a through opening that usually runs radially, i.e. in a transverse direction.
  • the so-called chick By such a displacement or rotation of the valve body, the so-called chick, the mouths of its radial through opening are brought into a partially or completely overlapping position with the mouths of the radial through opening of the base body, the valve is partially or completely opened and the material can Flow radially through the base body from one side to the other.
  • At least one annular surface around the respective mouth of the base body serves as the seat surface, i.e. the contact surface for the sealing surface of the valve body.
  • At least one ring surface around the respective mouth of the valve body serves as the sealing surface, or the entire inner circumferential surface of the base body in the axial direction Area in which its mouths lie or the entire outer circumferential surface of the valve body in the axial area in which its mouths lie. If the valve body is twisted relative to the base body about its axial axis or displaced in the axial direction to such an extent that the mutual openings of the radial through openings of the valve body and base body no longer overlap, the valve is closed because the outer circumference of the valve body lies close to the inner circumference of the base body .
  • the advantage of a plug valve is basically that by moving or turning the valve body from the open to the closed position on the outlet side of the base body, no additional material can get into the outlet line that connects to the valve base body on the outlet side. is pressed, so that very precise metering is possible - especially in comparison to the volume of the radial through opening of the valve body - of very small metering quantities, in contrast to other valve shapes such as a membrane valve.
  • the disadvantage of a plug valve is that the material on the seat surface of the valve can get between the valve body and the base body, causing relatively rapid wear on both due to their relative movement.
  • a material pairing is selected between the seat surface on the base body and the sealing surface on the valve body, the materials of which have a significantly different hardness, in particular the valve body consists of the softer material, preferably a plastic such as HPU, PTFG or polyethylene, at least on its outer circumference , while the seat of the Base body consists of a harder material, be it a harder plastic or preferably metal, in particular hardened metal.
  • the seat surface and the sealing surface do not have to be surfaces in the geometric sense that have no extension transversely to the surface, but rather surfaces whose thickness can be different from zero.
  • the outer peripheral surface of the valve body at least on its sealing surfaces, consists of a softer material with a shore hardness of at most 96, in particular at most 70, in particular at most 55 and / or a tensile strength of at most 60 MPa, in particular at most 50 MPa and / or an elongation at break of at least 350%, in particular at least 400%
  • This measure ensures that, on the one hand, abrasive, hard particles of the mass to be conveyed can be pressed into the softer material of this material pairing and thus do not produce any wear on this softer material and, on the other hand, the wear that occurs primarily on the softer material
  • This material pairing preferably the valve body, occurs, which, however, can be changed more easily than the base body of the plug valve, which is permanently installed in the surrounding structure.
  • the outermost layer of the peripheral surface of the valve body - especially in the case of a truncated cone-shaped design - is formed as a replaceable sleeve made of soft material and can easily be changed on the valve body after the valve body has been removed from the base body.
  • the valve body preferably consists of the soft material of its outer peripheral surface over its entire cross section, i.e. it is a valve body that is solid in terms of the soft material and is only penetrated by the transverse bore.
  • wear can be reduced - if the largest diameter of the transverse bore in the valve body is relatively large compared to the cone angle of the truncated cone, for example the cone angle to the axial direction is at least 10°, better at least 20°, better at least 30° - by adjusting the Valve body in the axial direction can still be compensated for a long time with a sufficiently large overlap of the mouths in the open valve position.
  • valve body can be changed quickly and easily by making the valve body easy to dismantle and assemble, preferably in less than 1 minute and without special tools, preferably completely without tools.
  • valve body In the case of a rotatable, i.e. pivotable, valve body, this is operatively connected, in particular at one of its end regions, to a pivoting drive, which causes pivoting from the open position into the closed position.
  • the swivel drive is preferably a pneumatic cylinder, which is off-center and in a tangential direction on the valve body or a from this radially bracing flange and the piston can be retracted and extended between two end positions, or any other swivel drive such as a gear drive or a drive by means of a threaded spindle, which in particular has a very large pitch.
  • valve body is part of a chick shaft which is mounted in the base body on both sides of the valve seat.
  • a bearing in particular a rolling bearing, can be provided at least at one end region in both the radial and axial direction, but at the other end at most in the radial direction, which enables a relative movement in the axial direction between the two end regions of the plug shaft for compressing the elastic valve body or at least its peripheral surface in the axial direction.
  • the valve body which is made of the softer material, is detachably connected on its end faces, preferably relative to the two adjacent end parts of the chick shaft, and can in this way be easily replaced - with the chick shaft removed from the base body - by loosening the valve body Connecting to the two adjacent end parts Split the plug shaft and insert a new valve body between them.
  • connection is made, for example, by axial screwing away from the through opening through the valve body or by radially inserting the valve body between the two end parts of the chick shaft, preferably along positive, in particular undercut, reciprocal guides that hold the valve body in both the axial direction Hold it firmly on the rest of the chick shaft as well as in the direction of rotation.
  • valve body with a constant cross-section of the valve body, at least in the area of its sealing surface, with a rotatable chick shaft, an axial stop for the chick shaft is necessary in order to exert an axial force on the chick shaft from the opposite side of the sealing body and thus the To be able to apply valve body.
  • this can be designed as a threaded bolt at one end part and as a threaded hole in the opposite other end part if the passage requirement runs eccentrically past the donation clamping screw.
  • a tensioning element such as a spring is preferably installed, which maintains the axial preload on the valve body over a wide wear range, for example in the form of a plate spring.
  • pivot position monitoring is provided for the valve body.
  • the plug shaft preferably has - in the axial direction away from the valve body - a radially strutting extension, in particular a flange, the pivoting position of which, preferably without contact, is monitored by an angle sensor at least with regard to the two end positions and is reported to the control of the metering device .
  • flushing pockets are arranged around the plug shaft in the valve seat, i.e. in the base body.
  • flushing pockets can be arranged around the chick shaft at a distance in the axial direction from the actual chick valve, i.e. the seat.
  • flushing pockets are preferably arranged in the axial region of the seat surface and the sealing surface, but offset in the circumferential direction from the mouths, in particular the seat surfaces surrounding the mouths.
  • the flushing pockets are technically connected to a flushing circuit flow and are flowed through by a flushing liquid, which transports away material that gets into the flushing pockets.
  • Figures 1a, b a section through a piston metering device, the inlet and outlet valve of which is designed as a plug valve, in different functional positions,
  • Figures 2a - c a first design of the plug valve with a rotatable, truncated cone-shaped valve body cut in the axial direction of the valve body,
  • FIG. 3a, b a second design of the plug valve with a rotatable, cylindrical valve body in analogous views according to Figure 2a, b,
  • Figure 4 a 3rd design of the chick valve with a movable
  • Valve body in an analogous view according to Figure 3a, also with an enlarged detail.
  • FIGS 1a, b show a piston metering device 1, in which a valve device 50 according to the invention with a plug valve 55 is used both as an outlet valve 16 and as an inlet valve 15, in the different movement phases.
  • piston dispensers 1 are present next to each other in a metering device for metering several material components to be mixed with one another, such as binders and hardeners of an adhesive, which, for. B. can be driven together from a common drive with synchronous movements of their piston rods.
  • 1a, b show, opening into the dosing cylinder 3, namely in its lower end face, is on the one hand an inlet line 5, via which the material M to be dosed is fed from a storage container 17 to the dosing cylinder 3 formed in the base body 2, and an outlet line 6 , via which the defined metering volume of material M contained therein after filling the metering cylinder 3 is ejected from the metering piston 4 in the direction of the outlet opening 7.
  • Figure 1a shows the drawing of the dosing volume into the dosing cylinder 3:
  • the outlet valve 16 is closed and the inlet valve 15 is opened, so that when the metering piston 4 - which is moved by means of a motor 18 - is moved back towards the increasing volume of the working space in the metering cylinder 3, the medium to be metered is sucked from the storage container into the metering cylinder 3 or flows in until the metering piston is in the completely retracted position, which corresponds to the desired metering volume in the metering cylinder 3.
  • FIGs 2a, b show a first design of a plug valve 55 with a truncated cone-shaped, conical valve body 52, the plug, which can be rotated about the axial direction, in the open position in the axial section in Figure 2a and in the front Soapy top view in Figure 2b and in Figure 2c in the closed position cut transversely to the axial direction 52 ':
  • the passage channel 52A2 which runs transversely to the axial direction and is usually designed as a transverse bore and runs radially through the valve body 52, is aligned with the supply channels 51 A2 adjoining it on both sides in the surrounding area Seat body 51 in that an opening 52A1 in the valve body 52 overlaps as completely as possible with the opposite opening 51A1 in the seat body 51.
  • valve body 52 which can be part of a chick shaft 53 in that it is attached axially between its two end regions 53a, 53b, is pivoted to such an extent by means of the pivot drive 54, in this case a pneumatic cylinder, that no If there is no more overlap, the plug valve 55 is in the closed position, as can be seen in the cross-sectional view of Figure 2c.
  • the pneumatic cylinder 54 engages in an articulated manner at an attachment point of the valve body 52 which is eccentric to the pivot axis 52' or a flange 59 extending radially therefrom or the entire encoder shaft 53, in particular its drive-side end 53a, and can be Using a pneumatic cylinder 54 that can be acted upon on both sides, pivot the valve body 52 back and forth between the open and closed pivot positions.
  • valve body 52 which is rotationally symmetrical about its pivot axis 52 ', its longitudinal extent, has at least in the axial region of the mouths 52A1 its transverse bore 52A2 - which are preferably in the same axial position, only in different rotational positions, in particular opposite ones with respect to one another the pivot axis 52 ', the axial direction, is located - a truncated cone-shaped outer circumferential contour, and the seat body 51 has an analogously shaped inner circumferential contour.
  • This inner circumferential contour 51AA consists of a hard material as a seat at least around the mouths 51A1, preferably along the entire inner circumferential contour with an axial extent that is greater than the axial extent of the mouths 51A2, in particular over the entire extent of the truncated cone -shaped area.
  • the chick shaft 53 is biased axially in the direction of the narrow end of the frusto-conical region by means of the biasing element 56, such as a spring.
  • a wear sensor 61 for example a distance sensor 61, which is fixedly mounted against the end face at the right-hand end 53b of the chick shaft 53, can detect the state of wear and communicate it to the control (not shown) of the valve device 50 or the higher-level unit. for example piston dosing 1, report.
  • the plug shaft 53 can then be pulled out axially to the left and the worn valve body 52 can be replaced.
  • valve body 52 which represents approximately the truncated cone-shaped area of the entire chick shaft 53 and is made over its entire cross section from a seat body 51 - which usually consists of metal, which is additionally hardened on the seat surface 51A is - softer Material consists of a positive fit by means of T-grooves running transversely to the longitudinal direction 52 ', which are formed, for example, in the end faces of the areas 53a, b of the chick shaft 53 facing it and can therefore no longer move in the assembled state of the chick shaft 53 from these areas 53a, b.
  • the chick shaft 53 is supported on the end region 53b adjacent to the smaller diameter of the frusto-conical section by a radial rolling bearing, in the opposite end region 53a, here the end region adjacent to the pivot drive 54, but only in an elastic circumferential seal 58a, which is in the seat body 51 is arranged, stored in order to always ensure a tight contact between the valve body 52 and the seat surface 5 A of the seat body 51.
  • chick shaft is sealed on both sides from the seat body 51 by further seals 58b, c surrounding it closer to the truncated cone-shaped area.
  • the end positions with regard to the pivoting position of the valve body 52 are monitored by monitoring one end, here the drive-side end, 53a of the plug shaft 53 for its rotational position about the pivot axis 52' using an angle sensor 60:
  • this can be done with an angle sensor 60 directed at the end face of the chick shaft 53 or in this case an extension 59 that projects radially relative to the chick shaft 53, in particular with a contactless action, which, with the help of this end face, corresponds to the two end positions. Markings spaced along the circumference can determine whether and in which end position the chick shaft 53 is located.
  • Figures 3a, b show, in the same viewing direction as Figures 2a, b, a second design of the plug valve 55, in which the valve body 52, which can also be rotated about the axial direction, has a cylindrical outer circumference and - preferably over its entire cross section - consists of one Material exists which is so elastic that when compressed in the axial direction it expands in the radial direction.
  • valve body 52 fastened between the end regions 5a, b of the plug shaft 53, which can be made of hard material such as metal, is worn, it can be compressed axially more strongly, as shown here by two clamping screws 62a, b running axially and away from the transverse bore 52A2, which pull the two end regions 53a, b more strongly against each other.
  • the valve body 52 thereby expands radially and, despite wear, rests closely and tightly against the seat surface 51 A, the inner circumference of the seat body 51.
  • the plug shaft 53 can be mounted on rollers at both end regions, as usual by means of a radial bearing and on one side by means of an additional axial bearing.
  • the end region 53b of the plug shaft 53 facing away from the axial bearing which is located here on the left side, will increasingly approach the other end region 53a.
  • FIG 4 shows, in the same viewing direction as Figures 2a and 3a, a third design of the plug valve 55, in which a valve body 52 can be moved axially back and forth transversely to the direction of its passage channel 52A2, i.e. in the longitudinal direction, for opening and closing, here by means of a sliding drive 62 which acts on the left end face of the chick shaft 53 - which can have a rectangular or round cross section.
  • the chick shaft 53 is therefore preferably not in contact with an axial stop in any of the functional positions, but a sensor 61 is used to detect which of the two axial end positions - open positions or closed position - the chick shaft 53 is currently located in.
  • valve body 52 which is made of elastic material, should be kept under pretension in the axial direction in order to compensate for wear in the radial direction due to the radial expansion caused thereby.
  • the preload can be generated in different ways: As shown in the enlargement in the lower half, the end part 53a connected to the sliding drive 62 has an axially projecting extension on the end face facing the valve body 52, which is designed as a threaded bolt and which extends in the transverse direction thereto Passage channel 52A2 runs past.
  • threaded bolt is positioned centrally to the end part 53a and the passage channel 52A2 is eccentric, or whether the passage channel 52A2 is arranged centrally and such a threaded bolt extends next to it, for example on both sides of it.
  • an axially resilient element for example a plate spring 64, and possibly a sleeve-shaped end part 53b, is threaded onto the threaded bolt and then a clamping nut 63 screwed on and tightened.
  • the axially resilient element such as the plate spring 64, expands from the flat state shown into a plate-shaped state and thereby applies an approximately constant axial force to the valve body 52, which is thereby radially close to the inner circumference. 51 AA of the seat body 51 is applied.
  • a seal or bearing relative to the seat part 51 can then be located in the assembled state, if desired.
  • the upper half shows that there is a threaded hole in the end face of the other end part 53b facing the valve body 52, so that - again after threading the valve body 52 and the resilient element - the end part 53b can be screwed onto the threaded bolt thereby applying an axial preload to the resilient element and thus the valve body 52.
  • the threaded bolt and also the threaded hole should of course run centrally so that the two parts are aligned with each other regardless of the rotational position when tightening and the through channel 52A2 must therefore run eccentrically so that both do not touch each other.
  • this end part 53b can be of any axial length and thus - as in the overall representation of Figure 4 - relatively far away
  • Seat body 51 can be stored - the storage must allow an axial displacement of the chick shaft 53 - including flushing pockets between the seat surface 51 A and the bearing points.
  • circumferential seals can also be used as plain bearings.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Lift Valve (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Taps Or Cocks (AREA)

Abstract

Afin de pouvoir distribuer exactement même de très petites quantités, au moins la soupape de sortie (16) de l'appareil de dosage (1) - habituellement un appareil de dosage de type à piston (1) - est conçue sous la forme d'une soupape à boisseau (55) ayant un corps de soupape déplaçable axialement ou rotatif (52). La soupape d'admission (15) peut également être une soupape à boisseau (55) ou bien une soupape à membrane. La conception avec un corps de soupape déplaçable (52) est préférée,
EP23735289.3A 2022-07-06 2023-06-26 Dispositif de dosage pourvu d'une soupape à boisseau Pending EP4551908A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022116856.5A DE102022116856A1 (de) 2022-07-06 2022-07-06 Dosier-Vorrichtung 5 mit Küken-Ventil
PCT/EP2023/067268 WO2024008498A1 (fr) 2022-07-06 2023-06-26 Dispositif de dosage pourvu d'une soupape à boisseau

Publications (1)

Publication Number Publication Date
EP4551908A1 true EP4551908A1 (fr) 2025-05-14

Family

ID=87036743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23735289.3A Pending EP4551908A1 (fr) 2022-07-06 2023-06-26 Dispositif de dosage pourvu d'une soupape à boisseau

Country Status (6)

Country Link
EP (1) EP4551908A1 (fr)
JP (1) JP2025523645A (fr)
KR (1) KR20250084101A (fr)
CN (1) CN120112773A (fr)
DE (1) DE102022116856A1 (fr)
WO (1) WO2024008498A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102024103382A1 (de) * 2024-02-07 2025-08-07 Dosmatix Gmbh Kolbendosierer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB226596A (en) * 1923-09-21 1924-12-22 Arthur G Enock & Company Ltd Improvements in apparatus for decanting milk
US4863066A (en) * 1986-06-02 1989-09-05 Technicon Instruments Corporation System for dispensing precisely metered quantities of a fluid and method of utilizing the system
FR2639066B1 (fr) * 1987-04-07 1993-02-19 Dosys Pompe doseuse a boisseau
US5127547A (en) * 1991-02-19 1992-07-07 Horst Gerich Metering and dispensing apparatus
DE4327597A1 (de) * 1993-08-17 1995-02-23 Friedhelm Schneider Dosiergerät mit Membrankolben für hochviskose Flüssigkeit
DE102008062846B4 (de) * 2008-12-23 2018-03-15 Scheugenpflug Ag Kolbendosierer mit überwachtem Ventil
US11598435B2 (en) * 2019-05-08 2023-03-07 Parker-Hannifin Corporation Stop/check/expansion plug valve
DE102021119144B3 (de) * 2021-07-23 2022-12-08 ventUP GmbH Dosierer mit gekapselten Funktionselementen

Also Published As

Publication number Publication date
CN120112773A (zh) 2025-06-06
DE102022116856A1 (de) 2024-01-11
KR20250084101A (ko) 2025-06-10
JP2025523645A (ja) 2025-07-23
WO2024008498A1 (fr) 2024-01-11

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