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EP4067651A1 - Soupape de dosage de chambre, système de dosage associé et procédé de distribution dosée d'un milieu visqueux - Google Patents

Soupape de dosage de chambre, système de dosage associé et procédé de distribution dosée d'un milieu visqueux Download PDF

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Publication number
EP4067651A1
EP4067651A1 EP21166328.1A EP21166328A EP4067651A1 EP 4067651 A1 EP4067651 A1 EP 4067651A1 EP 21166328 A EP21166328 A EP 21166328A EP 4067651 A1 EP4067651 A1 EP 4067651A1
Authority
EP
European Patent Office
Prior art keywords
media
dosing
chamber
medium
metering valve
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.)
Granted
Application number
EP21166328.1A
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German (de)
English (en)
Other versions
EP4067651C0 (fr
EP4067651B1 (fr
Inventor
Tobias Faaß
Karl Andreas Robert Straß
Thomas Kehrle-Fischer
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.)
D and P Dosier & Prueftechnik GmbH
Original Assignee
D and P Dosier & Prueftechnik 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.)
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Publication date
Application filed by D and P Dosier & Prueftechnik GmbH filed Critical D and P Dosier & Prueftechnik GmbH
Priority to EP21166328.1A priority Critical patent/EP4067651B1/fr
Publication of EP4067651A1 publication Critical patent/EP4067651A1/fr
Application granted granted Critical
Publication of EP4067651C0 publication Critical patent/EP4067651C0/fr
Publication of EP4067651B1 publication Critical patent/EP4067651B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams

Definitions

  • the present invention deals with a chamber metering valve for metered delivery of a viscous medium according to the preamble of claim 1, an associated metering system and a method for metered delivery of a viscous medium according to the preamble of claim 15.
  • the invention deals with a chamber metering valve and a method for finely metered delivery of a viscous medium in small quantities, such as the dispensing of lubricants, adhesives, sealants and the like.
  • the process media to be dosed include e.g. B. oils, paints, lubricants such. B. fats, resins, silicones, adhesives, sealants, gels, pastes, liquid polymers, casting compounds and pasty substances of pharmaceutical, food technology or general industrial processing technology.
  • the media to be dosed and the user scenarios are characterized by a large variety of parameters, which result, for example, from the variety of applications, the characteristic material properties of the media to be applied, their provision, the media and environmental conditions prevailing during storage and application (e.g. temperature and humidity), used and necessary process pressures, the chemical reaction behavior and the possible corrosive effects of the media and, above all, their viscosity.
  • a further complication is the requirement to provide the media in a controlled and finely dosed manner in a wide range of quantities or volumes, with repeat accuracy and as far as possible without interruption.
  • dosing valves or dosing units - Various solutions for dosing systems - generally referred to as dosing valves or dosing units - are known from the prior art, the fluids of different types apply from one or more existing components.
  • dosing systems for dosing small amounts of liquids and media of low viscosity are known, which are designed like a syringe as a one-chamber system in different sizes, flow rates and forms of realization.
  • the mostly liquid dosing substances are applied with pinpoint accuracy, for example via hollow needles, via a longitudinal movement of a piston.
  • Such dosing systems are known and used by a. in process engineering apparatus technology, for the controlled filling of mostly liquid media and mixtures in special containers. Your field of application is determined, for example, by the requirements of the filling technology, the procedural media provision or use in the laboratory environment.
  • Such single-chamber dosing systems include, for example, a dosing unit and a drive unit, which are connected to one another in order to apply a medium from the dosing unit.
  • the dosing unit comprises at least one media inlet, at which the medium is supplied to the dosing unit under pressure, and a media outlet, via which the medium is discharged from the dosing unit.
  • the dosing unit has a media chamber with a media inlet and a media outlet, via which the medium enters the chamber and is administered from it again.
  • the media chamber includes a dosing piston which is moveable by the drive unit between a reverse movement while the medium enters the chamber and a forward movement for dispensing the medium through the medium outlet.
  • the lubricant has to be recharged even with larger chamber volumes, which means an interruption of approx. 30 seconds. means in the process flow. must z. If, for example, a part is wetted with lubricant in a production process, the production process must be interrupted for the corresponding loading time in order to load the chamber metering valve. It has to be e.g. B.
  • One goal is that interruptions in the dosing process due to loading of the chamber dosing valve should be eliminated as completely as possible.
  • the task is also to provide a method for metered dispensing of a viscous medium, it being possible for the dispensing to take place continuously and with little pulsation.
  • the object of the invention is achieved by a chamber metering valve for metered delivery of a viscous medium according to claim 1, a metering system according to claim 13 and a method for metered delivery of a viscous medium according to claim 15.
  • a chamber metering valve for the metered delivery of a viscous medium comprises a metering unit and a drive unit which are connected to one another.
  • the dosing unit has at least one media inlet, at which the medium is supplied to the dosing unit under pressure.
  • the dosing unit also has a media outlet, via which the medium is released from the chamber dosing valve.
  • the dosing unit has a first media chamber, which includes a media inlet and a media outlet as well as a dosing needle.
  • the dispensing needle is oscillatingly movable between an advance movement as a dispensing position and a reverse movement as a loading position. When the dosing needle moves backwards, the medium is pressed into the media chamber due to the pressure applied at the media inlet. During a feed movement, the medium is discharged from the media chamber via the media outlet.
  • the dosing unit comprises at least one second media chamber with a media inlet, a media outlet and a dosing needle.
  • the media outlets of the first and the at least one second media chamber open into the media outlet of the dosing unit.
  • only a single common media outlet is present, which is connected to the media outlets of the media chambers.
  • the first and second medium chambers are preferably identical in construction, but can differ from one another in their designs depending on the given structural requirements for the chamber metering valve.
  • Each of the dosing needles of the media chambers is coupled to a cam disk that is arranged on a common axis of rotation.
  • a cam disk that is arranged on a common axis of rotation.
  • at least two cam discs are provided - when the chamber metering valve is designed as a two-chamber metering valve.
  • more chambers and thus cam disks are present in chamber metering valves with more than two chambers, such as three chambers with three cam disks on a common axis of rotation in a three-chamber metering valve.
  • the axis of rotation is coupled to the drive unit, so that when the axis of rotation rotates, the dosing needles each oscillating between the feed movement as the dosing position and via their coupling to the respective cam disk the reverse movement than the loading position are movable.
  • the at least two cam disks are shaped in such a way and arranged offset to one another on the axis of rotation such that a first metering needle is essentially advanced during a backwards movement of a second metering needle, so that the medium is continuously dispensed from the chamber metering valve.
  • a two-chamber system is always described below as a possible example of the invention.
  • the metering valve according to the invention can also have more than two chambers.
  • Those skilled in the art will be able to adapt the device accordingly and, for example, to arrange the cam discs on the axis of rotation by 120°, instead of being offset by 180° in a two-chamber system.
  • the Kammerdosierventil can advantageously be modular, with z. B. the drive unit form a first module and the dosing unit form a second module. All components of the dosing unit, such as the at least two media chambers with the associated dosing needles, the media inlet, the media outlet, the axis of rotation with the cam discs, etc. can be accommodated in a modular element, for example.
  • a method for the continuous and low-pulsation metering of a viscous medium using a chamber metering valve is provided.
  • a chamber metering valve as described above can advantageously be used to carry out the method.
  • medium is fed under pressure to the chamber metering valve via a delivery unit.
  • an inlet pressure of at least 10 bar (1 MPa) to a maximum of 50 bar (5 MPa) can be used.
  • a media chamber with a metering needle is provided in the chamber metering valve, which is moved between a forward movement as a metering position and a backward movement as a loading position.
  • the conveyor unit pushes the medium through a media inlet into the media chamber and during the forward movement, the dosing needle pushes the medium through a media outlet from the media chamber into a media outlet of the chamber metering valve, via which the medium leaves the chamber metering valve.
  • At least two media chambers are provided, the dosing needles of which are each moved between the dosing position and the loading position via a rotating cam disk, for which purpose the cam disks are arranged on a common axis of rotation.
  • the cam disks are shaped in such a way and are arranged offset to one another on the axis of rotation such that the dosing position of the first dosing needle essentially alternates with the dosing position of the second dosing needle and a first dosing needle performs a forward movement while a second dosing needle performs a backward movement.
  • Such a counter-rotating movement of the metering needles means that medium is pressed out of one of the medium chambers into the medium outlet at any point in time during the metering process, as a result of which the medium is metered out of the chamber metering valve continuously and with little pulsation.
  • the cam discs are designed, for example, as eccentrics. If the at least two media chambers are arranged parallel to one another, these eccentrics can be arranged rotated relative to one another on the axis of rotation, for example, in order to allow the feed movement of a first dosing needle to alternate with the feed movement of a second dosing needle.
  • the displacement of the cam disc along the axis of rotation results from the structural distance between the dosing needles and the media chambers.
  • the rotational movement of the cam disks is converted into a linear movement of the dosing needles and the at least two dosing needles can be moved back and forth in the media chambers in a coordinated manner.
  • the media flow can be controlled and continuously maintained.
  • the chamber metering valve according to the invention can also be referred to as a proportional metering valve, because the delivery of the medium, the metering, takes place proportionally to the path covered by the circumference of the cam disc that moves the metering needle in the advance position.
  • the distance covered on the circumference of the cam disc on the way there is precisely converted into a continuous linear movement of the dosing needle due to a preferred design of the circumferential contour as an Archimedean spiral; the distance covered on the cam disk is converted directly proportionally into the distance covered by the dosing needle in the feed.
  • a viscous medium can be dispensed in a finely metered manner and the quantity dispensed is reliably reproducible.
  • the asynchronous oscillating movement of at least two dosing needles enables the medium to be administered continuously and in a precise quantity.
  • the chamber dosing valve can have a small, compact design with few components.
  • the invention lies in removing the medium already in the system from the system.
  • medium is introduced into the system and with dosing technology, medium is removed from the system in a controlled manner.
  • a dosing valve the focus is on the dosed, locally limited or precise delivery, i.e. the delivery of a defined quantity.
  • grease quantities of 0.003 g can be dosed exactly.
  • a sensitively adjustable dosing of small amounts is made possible, even for highly viscous lubricants.
  • Media with higher viscosity bring various problems with them. Dosing is more difficult because high pressures of at least 10 bar have to be used. Even with such media, the media delivery must be stopped and started quickly. Sealing against material leakage is particularly important. For uninterrupted dosing, the viscous flow of lubricating grease must be kept running. Small sizes and small dead spaces are required for controlled, sensitively adjustable grease metering, as well as an integrated metering valve with the smallest chamber volumes.
  • the dosing quantity can be adjusted more sensitively the smaller the supply spaces in the pistons are selected and the more directly they are controlled.
  • the drives in order to be able to dose larger quantities of media, the drives must be designed in such a way that high rotational speeds can be used on the drive side and induced vibrations are avoided.
  • the camshaft is preferably controlled directly with the smallest axes.
  • the direct connection to the motor ensures the shortest rise and fall times and allows highly dynamic control.
  • the present invention brings with it numerous advantages, such as e.g. T. already explained above.
  • the metering valve requires little maintenance and is very compact. Continuous dosing is possible because one chamber is filled and the other chamber is ejected at the same time. This makes it possible to apply beads of lubricating grease, i.e. in principle the endless application of lubricating grease. In exactly the same way, however, a selective delivery of the lubricant is possible. This depends solely on the operation of the system.
  • the metering needles are prestressed in the direction of the cam discs by means of a spring.
  • the needles are always pressed against a peripheral contour of the cam and the needles are coupled to the cam.
  • a compression spring can be used for this, for example, which is supported on the one hand on a coupling end of the metering needle pointing towards the cam disk and on the other hand on the media chamber or a housing of the chamber metering valve. The spring ensures a continuous transmission of drive between the cam and the dispensing needle.
  • the dispensing needles can also be pressed against the cam disc by the medium, which flows under pressure into the media chamber as soon as the dispensing needle begins to move backwards.
  • the dosing needle can have a roller at its coupling end, which rolls against the peripheral contour of the cam disk. During the rotation of the cam, the roller thus rolls smoothly on the peripheral contour and transmits the drive movement the cam disk on the dosing needle to press the medium out of the media chamber during the dosing position or to release the chamber volume to fill the media chamber during the loading position.
  • the dosing needles are preferably mounted in the media chambers in a torque-free manner.
  • a seal package and/or bearings can be provided for this purpose, for example.
  • the drive unit is designed as an electric motor.
  • the electric motor can with its output shaft directly or indirectly such. B. via a belt to be coupled to the axis of rotation. Electric motors are small and can generate high speeds.
  • the motor is advantageously designed as a modular unit and can be arranged directly on the dosing unit.
  • a non-return valve can be provided at the media inlet to the media chamber, which prevents backflow from the media chamber into the supplying conveyor system. A medium that has been filled into the media chamber is therefore only released via the media outlet of the chamber.
  • a control valve preferably a non-return valve, is advantageously provided in each media outlet of each individual chamber, which prevents backflow into the respective media chamber when the metering needle of an adjacent chamber moves forward or when the metering needle of this chamber moves backwards.
  • the media volumes from all media chambers are fed into a common media outlet.
  • the medium is ejected into a common channel by each piston, also referred to as a tappet, in the present case usually referred to as a dosing needle.
  • each piston also referred to as a tappet
  • the lubricating grease or other type of medium in the system is drawn in by one piston into the piston chamber, usually referred to here as the media chamber, while the other piston is in ejection mode and ejects the medium again.
  • the ejection by both pistons takes place in one and the same outlet channel and ends in the common media outlet.
  • the cam disc is designed in such a way that the ejection interval of both pistons overlaps.
  • cams With a correspondingly precise design of the cam discs, also referred to as cams, the total output is completely uninterrupted, i.e. not only low pulsation but pulsation free. It was shown that with precise alternating operation, ie when one piston is in the loading interval while the other is in the ejection interval, low-pulsation dosing is possible, but that an exactly uniformly thick or wide bead of grease cannot be ejected . Instead, small deviations in the amount of grease have been observed, ie the bead becomes somewhat uneven. By providing an overlap interval, this problem is eliminated; shortly before the piston that is currently in the ejection interval ends its ejection activity, the second piston already begins its ejection interval.
  • the check valves and control valves mentioned above prevent carryover or overrun in the outlet, which v. a. with viscous media that are introduced with high working pressures could be a problem.
  • the shut-off valve at the media outlet is particularly important, as it promotes overrun and drip-free media dosing.
  • the present multi-chamber metering valve has various advantages, such as T. already mentioned above. Due to the cam design described above, there are other advantages, namely: No referencing is necessary. It doesn't matter what state the system is in when it's stopped, it can just keep going. It also makes no difference whether an identical quantity of lubricant is to be dispensed in each cycle or whether, for example, a program is to be run through in which, for example, two individual drops are to be dispensed alternately and then metered continuously over a short distance. None of this plays a role for the present system, since it is completely free of referencing. It is an endless system. The system can be restarted at any point. Even if the emergency stop is actuated, the system can easily continue to be operated.
  • the common media outlet can advantageously have a non-return valve or a control valve, preferably a non-return valve, for regulating the delivery of the medium from the chamber metering valve and in particular for preventing backflow into lines and channels of the metering valve leading to the common media outlet.
  • a non-return valve or a control valve preferably a non-return valve
  • the non-return valves in the media inlets, the control valves or non-return valves, in the media outlets and in the media outlet can together form a valve system for regulating the continuous flow of media and thus the amount of media applied.
  • the chamber metering valve according to the invention in contrast to the extruder-like dispenser known in the prior art, is particularly good for ointment-like and viscous, so-called pasty media, such as e.g. B. lubricants, suitable.
  • pasty media such as e.g. B. lubricants
  • Gear greases for example, fall into NLGI consistency classes 000, 00, 0 and 1, while roller bearing greases and plain bearing greases fall into classes 2 and 3 (as well as 4).
  • the media chambers advantageously have a maximum volume of 5,000 mm 3 , in particular 1,000 mm 3 , preferably 500 mm 3 , more preferably 200 mm 3 or less up.
  • the media chambers are advantageously designed as elongated cylinders in order to be able to achieve an advantageous stroke length of the dosing needles.
  • control valve or the non-return valve in the media outlets is designed in such a way that a minimum pressure of 30 bar, preferably 35 bar, particularly preferably over 40 bar, to Opening the control valve or check valve is required. At these pressures, it can be ensured that there is sufficient thrust to continuously press the medium into the media outlet and to be able to release a defined quantity of the medium from the chamber metering valve.
  • the metering unit has a guide sleeve for each metering needle to guide the oscillating movement of the metering needle.
  • At least two, preferably at least three, independent sealing devices for sealing between the media chamber and the dosing needle are advantageously provided in the guide sleeve.
  • the sealing devices can, for. B. be formed by sealing rings that are held by the guide sleeve and form a contact surface for the dispensing needle.
  • the at least two sealing devices form a sealing package that reliably prevents medium from escaping in an uncontrolled manner from the media chamber.
  • seals in the form of O-rings are provided in each media chamber.
  • the combination of the same in series ensures the required high tightness of the system with the demanding process requirements, as described here, v. a. the high working pressures.
  • the complete set of seals is particularly preferably mounted in a sleeve and at the same time serves to guide the dosing needle.
  • the medium in the medium chambers can be tempered by means of a heating and/or cooling device.
  • the temperature of the medium in the chambers can thus be matched to the requirements for a defined and reproducible release of the medium from the chamber metering valve.
  • a metering system comprising a chamber metering valve as described above and a control unit for the chamber metering valve.
  • the control unit can be used, for example, to set a rotational speed of the axis of rotation; B. controlled depending on an applied pressure, it can be determined a temperature for the media chambers and / or the medium pressure at the media inlet can be adjusted.
  • the chamber metering valve can be controlled as a function of the viscosity of a medium, so that a reproducible delivery of a preset amount of media can be variably determined in a defined time window.
  • FIGs 1 to 9 an embodiment of a chamber metering valve and a method for the continuous and low-pulsation metering of a viscous medium using such a chamber metering valve according to the invention is shown.
  • the embodiment shown is particularly suitable for the metering and application of lubricants such. B. fats, as they are used in machine, automation and process technology.
  • a chamber metering valve according to the invention can also be used for metering oils, as well as for almost solid, highly viscous and sticky media.
  • a particularly preferred design of a cam disc is shown, as can be preferably used in a chamber metering valve 100.
  • FIG figure 5 shows a longitudinal section through the chamber metering valve 100 with two media chambers 5, 6 according to the present invention.
  • the chamber metering valve includes a drive unit 1 and a metering unit 2. Details of the chamber metering valve 100 are based on FIG figure 9 described.
  • the dosing unit 2 has a media inlet 3 for supplying the chamber metering valve 100 with a medium to be applied from a reservoir (not shown) and a media outlet 4 for the continuous delivery of the medium from the chamber metering valve 100 . Connections for an alternative media input 3' and an alternative media output 4' are provided in order to be able to do justice to the structural conditions at the place of use if necessary.
  • the dosing unit 2 has a first media chamber 5 and a second media chamber 6 which are aligned parallel to one another in a housing of the dosing unit 2 .
  • the media chambers 5 and 6 each have a media inlet 7 or 7' and a media outlet 8 or 8'.
  • the media outlets 8 and 8' of the at least two media chambers 5 and 6 each open into the media outlet 5 of the dosing unit 2.
  • Each media chamber also has a dosing needle that is movably mounted in the chamber, ie a first dosing needle 9 in the first media chamber 5 and a second dosing needle 10 in the second media chamber 6.
  • the dosing needles 9 and 10 each have a feed end 11, 11' and a coupling end 12, 12'.
  • Coupling sleeves 13, 13' are fixedly attached to the dosing needles 9 and 10 at the coupling end 12, 12' and serve as bearings for rollers 14, 14' at the end of the dosing needles 9 and 10.
  • a spiral spring 15, 15' is provided for each dosing needle 9 and 10, which is clamped between the coupling end 12, 12' of the dosing needles and a stop 16, 16' fixed to the housing.
  • the spiral springs 15, 15' tension the dosing needles 9 and 10 in the loading position, ie in figure 1 to the left, forward.
  • a check valve is provided in each of the media inlets 7 and 7' to the media chambers 5 and 6, respectively.
  • the non-return valve 17 is inserted in the media inlet 7', which prevents the medium from flowing back out of the media chamber in the direction of the storage vessel.
  • Such a check valve is also provided in the media inlet 7 .
  • control valve or check valve 18 is provided in each media outlet 8 or 8′, which prevents backflow into the respective media chamber and regulates the exit of the medium from the respective media chamber.
  • a control or check valve 19 is provided (see figure 5 ), which supports the fine dosing of the media application.
  • the non-return valves and control valves prevent entrainment or after-running in the media outlet and in the media outlets, which can be a problem, especially with viscous media that are fed with high working pressures. Above all, the valve at the media outlet prevents overrun and drip-free media dosing.
  • the coupling ends 12 of the dosing needles 9 and 10 are aligned in the direction of an axis of rotation 20 and perpendicular to it.
  • the axis of rotation 20 is rotatably mounted in bearings 21 and 21 ′ in the housing of the dosing unit 2 .
  • a first cam disk 22 which interacts with the first dosing needle 9
  • a second cam disk 23 which interacts with the second dosing needle 10 , are arranged on the axis of rotation 20 and rotate together with the axis of rotation 20 .
  • the cam discs 22 and 23 are eccentric, rotated through 180° to one another and offset in the longitudinal direction on the axis of rotation 20 .
  • the axis of rotation 20 and the cam disks 22 and 23 together form a type of camshaft which acts on the dosing needles 9 and 10 of the media chambers 5 and 6 .
  • the dosing needles 9 and 10 with their respective rollers 14 rest against a peripheral contour 24 or 24' of the cam disk 22 and 23, the rollers 14 being pressed by the compression springs 15 against the peripheral contours 24 or 24'.
  • the dosing needles 9 and 10 are thus coupled to the cam disks 22 and 23 via the rollers 14 .
  • the axis of rotation 20 is in turn coupled to the drive unit 1 in order to be able to be driven in rotation by it.
  • the dosing unit 2 has a guide sleeve 30, 30' for each of the dosing needles 9 and 10 for guiding a movement of the dosing needles 9 and 10, which each adjoin the media chambers 5 and 6.
  • the guide sleeves 30, 30' are used for the torque-free mounting of the dosing needles.
  • the guide sleeves 30, 30' have the function of a sealing package.
  • the seals 31, 31', 33, 33', 35, 35' for example sealing rings such as O-rings, are arranged separately from one another in the guide sleeve 30 or 30' and thus each form an independent seal.
  • the seals mentioned together form a seal package for sealing between the media chamber and the dosing needle.
  • the combination of the seals 31, 33, 35 or 31', 33', 35' ensures the high level of tightness required for demanding process requirements.
  • vent 32, 32 ', z. B. a vent valve provided.
  • the metering needles 9 and 10 of the metering unit 2 are driven by the drive unit 1 by rotating the axis of rotation 20 to oscillate between a forward movement as a metering position and a backward movement as a loading position.
  • the axis of rotation 20 is in turn driven by the drive unit 1 .
  • the two cam disks 22 and 23 are shaped in such a way and arranged offset to one another on the axis of rotation 20 such that essentially a forward movement of the first metering needle 9 takes place during a backward movement of a second metering needle 10, so that the medium is continuously dispensed from the chamber metering valve.
  • the loading position i. H.
  • figure 8 shows a three-dimensional partial section of the chamber metering valve with the axis of rotation 20, which carries the first cam disk 22 and the second cam disk 23, and the metering needles 9 and 10 and their coupling by means of the rollers 14 to the cam disks 22 and 23.
  • the drive unit is designed as an electric motor 50 .
  • the electric motor 50 includes an output shaft 51 which protrudes outwards from a housing of the electric motor 50 .
  • a carrier plate 54 is attached to the housing, on which a first drum 52 and a second drum 53 are rotatably mounted offset to the first drum 52 .
  • the first drum 52 can be coupled to the output shaft 51 and the second drum 53 can be coupled to the axis of rotation 20 of the dosing unit 2 .
  • a transmission belt 55 is wound around the first drum 52 and the second drum 53 placed so that a rotation of the output shaft 51 via the first drum 52 and the belt 55 on the second drum 53 and thus on the axis of rotation 20 can be transmitted.
  • a cover 56 may be fitted over the drums 52 and 53 and the belt 55.
  • a control unit can be provided on the chamber metering valve or remotely from it, which controls, for example, the drive unit and the valves of the chamber metering valve.
  • a device for heating and/or cooling the medium in the medium chambers can be provided, which can also be regulated via the control unit.
  • the media chambers are preferably machined from an aluminum block. Concomitant heating or cooling is rapidly transmitted to the medium through the aluminum.
  • cam disk 22 In figure 10 an advantageous embodiment of the cam disk 22 is described.
  • the cam discs 22, 23 are identical. However, they are arranged offset along the longitudinal axis of the axis of rotation 20 corresponding to a distance between the media chambers 5 and 6 .
  • the cam disks 22 and 23 are also provided rotated by 180° on the axis of rotation 20 .
  • FIG 10 only one cam 22 is shown. It has an eccentric design, as can be clearly seen.
  • the peripheral contour 24 has different sections, which divides the rotation of the cam about the axis of rotation 20 into different phases of rotation. The individual rotation phases can be distinguished from each other based on their geometric design.
  • a forward sector 40 for the forward movement and a return sector 41 for the backward movement of the dosing needle can be distinguished as the main sections.
  • the advance sector 40 extends from the low point 45, which can also be regarded as the starting point of a movement cycle of a dispensing needle, to the high point 44.
  • the return sector 41 extends from the high point 44 to the low point 45.
  • a peripheral contour section of the forward sector 40 differs from a peripheral contour section of the return sector 41 in such a way that the feed movement lasts longer than the backward movement - the path of the forward sector 40 is longer than the path of the return sector 41.
  • the peripheral contour 24 can be divided into different sections, which can be distinguished on the basis of their geometric properties.
  • the forward sector 40 extends from the low point 45 to the high point 44.
  • the peripheral contour 24 is a straight line - reference number 43.
  • This is followed by a large section which has the shape of an Archimedean spiral - reference number 46
  • the path length of the cam disk is converted directly proportionally into the path of the dosing needle.
  • the return sector 41 extends from the high point 44 to the low point 45. This is for the most part a simple radius. Another radius is provided immediately before the low point 45 - the transition radius from the return to the forward 47.
  • the peripheral contour in the main part of the forward sector 40 is advantageously designed in a spiral shape (section 46) for a continuous feed movement of the dosing needle.
  • a radius of the peripheral contour in the return sector 41 can be oval-shaped. This means that the radius increases from the beginning of the return phase to the middle of this phase and then decreases again until the end of the return phase. There is thus a symmetrical change in radius around the center of the retrace phase.
  • figure 10 clarifies the special shape of the cam disks 22 and 23 mounted on the axis of rotation 20 in a preferred exemplary embodiment of a chamber metering valve 100 according to the invention.
  • the peripheral contour 24, 24' is a type forms a semi-oval.
  • the shape leads to a largely counter-rotating movement of the dosing needles 9 and 10, as a result of which the emptying and refilling of each media chamber 5 and 6 takes place alternately in a single rotation of the axis of rotation 20.
  • the peripheral contour 24, 24′ in the transition sectors 42 and 47 is shaped in such a way that there is an overlapping area for the movement of both dispensing needles, in which there is a targeted, short-term feed movement of the dispensing needles in the same direction in the media chambers.
  • the advance phase starts via the advance sector 40, which leads to the forward movement of the dosing needle in the media chamber and thus to its emptying.
  • the return phase via the return sector 41 starts, during which the dosing needle moves backwards in the media chamber and this is again filled with medium from the reservoir.
  • the cycle ends when the low point 45 is reached.
  • the tangential transition area 47 leads back via the low point 45 as the starting point of the movement to the straight line 43 as the initial path of the cycle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP21166328.1A 2021-03-31 2021-03-31 Soupape de dosage de chambre, système de dosage associé et procédé de distribution dosée d'un milieu visqueux Active EP4067651B1 (fr)

Priority Applications (1)

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EP21166328.1A EP4067651B1 (fr) 2021-03-31 2021-03-31 Soupape de dosage de chambre, système de dosage associé et procédé de distribution dosée d'un milieu visqueux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21166328.1A EP4067651B1 (fr) 2021-03-31 2021-03-31 Soupape de dosage de chambre, système de dosage associé et procédé de distribution dosée d'un milieu visqueux

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EP4067651A1 true EP4067651A1 (fr) 2022-10-05
EP4067651C0 EP4067651C0 (fr) 2025-04-30
EP4067651B1 EP4067651B1 (fr) 2025-04-30

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096275A5 (fr) * 1970-06-13 1972-02-11 Ismatec Sa
WO2016132097A1 (fr) * 2015-02-18 2016-08-25 Finishing Brands Uk Ltd. Pompe à haute pression pour pomper un matériau extrêmement visqueux
US20170199513A1 (en) * 2015-01-30 2017-07-13 Wagner Spray Tech Corporation Piston limit sensing and software control for fluid application
US20180030966A1 (en) * 2016-07-28 2018-02-01 Jelley Technology Co., Ltd. Device of grease gun
US20180087492A1 (en) * 2016-09-23 2018-03-29 FD Johnson Company Lubrication pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096275A5 (fr) * 1970-06-13 1972-02-11 Ismatec Sa
US20170199513A1 (en) * 2015-01-30 2017-07-13 Wagner Spray Tech Corporation Piston limit sensing and software control for fluid application
WO2016132097A1 (fr) * 2015-02-18 2016-08-25 Finishing Brands Uk Ltd. Pompe à haute pression pour pomper un matériau extrêmement visqueux
US20180030966A1 (en) * 2016-07-28 2018-02-01 Jelley Technology Co., Ltd. Device of grease gun
US20180087492A1 (en) * 2016-09-23 2018-03-29 FD Johnson Company Lubrication pump

Also Published As

Publication number Publication date
EP4067651C0 (fr) 2025-04-30
EP4067651B1 (fr) 2025-04-30

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