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WO2015192896A1 - Soupape de dosage pourvue d'un poussoir de soupape - Google Patents

Soupape de dosage pourvue d'un poussoir de soupape Download PDF

Info

Publication number
WO2015192896A1
WO2015192896A1 PCT/EP2014/062835 EP2014062835W WO2015192896A1 WO 2015192896 A1 WO2015192896 A1 WO 2015192896A1 EP 2014062835 W EP2014062835 W EP 2014062835W WO 2015192896 A1 WO2015192896 A1 WO 2015192896A1
Authority
WO
WIPO (PCT)
Prior art keywords
push rod
actuator
tip
plunger
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.)
Ceased
Application number
PCT/EP2014/062835
Other languages
German (de)
English (en)
Inventor
Mario Fließ
Jürgen STÄDTLER
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.)
Vermes Microdispensing GmbH
Original Assignee
Vermes Microdispensing 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 Vermes Microdispensing GmbH filed Critical Vermes Microdispensing GmbH
Priority to PCT/EP2014/062835 priority Critical patent/WO2015192896A1/fr
Priority to TW104119649A priority patent/TW201600775A/zh
Publication of WO2015192896A1 publication Critical patent/WO2015192896A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/50—Preventing rotation of valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
    • F16K31/007—Piezoelectric stacks

Definitions

  • the invention relates to a push rod for a valve stem of a metering valve. Furthermore, the invention relates to a plunger tip for a valve lifter. In addition, the invention relates to a valve tappet for a metering valve. Finally, the invention relates to a metering valve, in particular for the delivery of very small Dosierstoffmengen, for example, media such as pasty substances or quantities of liquid.
  • metering valves are used, which are provided with a closing element, for example a ball, which via a valve plunger (hereinafter also referred to as pestle) is pressed.
  • the valve comprises at the point of discharge of the medium to be metered a nozzle with a sealing seat on which the ball rests in the fully closed state of the valve, so that the highly liquid or pasty medium to be dispensed can not escape.
  • the plunger first releases the opening of the metering valve by lifting it off the sealing seat of the nozzle.
  • the medium for example driven under admission pressure, can fill the area under the tappet and, in the case of a low-viscosity medium, flow through the nozzle opening or valve opening.
  • the plunger closes the nozzle of the valve, wherein the plunger ejects the medium from the nozzle and eventually stops at the sealing seat.
  • the aforementioned abrasive wear depends significantly on the filler particles and the viscous properties of the medium, which can be influenced by the dosing and their application only within certain limits (for example, temperature).
  • the process is expected to be able to transport a predefined amount of media to the desired destination more and more efficiently, that is, generally faster.
  • piezoelectrically driven microdosing systems have distinguished themselves in that they have higher frequencies and thus higher efficiency in the sense of the process than alternatively driven dosing systems.
  • the push rod according to the invention which is particularly suitable for an above-mentioned valve stem of a metering valve, extends in a longitudinal direction along a longitudinal axis and has an actuator pressure surface.
  • the actuator pressure surface serves for the interaction of the push rod with an actuator of the metering valve.
  • the push rod eccentrically to the longitudinal axis of the push rod has a positioning element on. The positioning element is thus arranged outside the center or the longitudinal axis of the push rod.
  • the positioning element can be designed, for example, for cooperation with a fork-shaped actuator during the actuation of the push rod.
  • the push rod is fixed in its angular position with respect to a direction of rotation about the longitudinal axis of the push rod.
  • the positioning element thus serves as Verwoodschutzelement. With the help of the fixation of the push rod in the direction of rotation an undesirable rotational movement of the valve stem is avoided, which could change, for example, the viscosity of a medium to be metered. Thus, an improved precision of the dosage is achieved by the push rod according to the invention.
  • the valve tappet according to the invention which is particularly suitable for a metering valve for dispensing a viscous medium, has a push rod according to the invention.
  • the valve stem may be formed in one piece, i. that the push rod forms a unit with the plunger tip. In a preferred variant, however, the push rod and the plunger tip are releasably coupled together.
  • a tappet tip according to the invention which is suitable for this purpose has a thread, preferably an internal thread, for coupling the tappet tip with a suitable thread, preferably an external thread, a push rod, in particular a push rod according to the invention.
  • the internal thread is particularly preferably a M 1, 6 thread.
  • the change of the tappet tip can be carried out in such a way that it can be designed by the user using as few aids as possible.
  • the metering valve according to the invention is particularly suitable for dispensing smallest quantities of liquid and has a valve tappet according to the invention and a nozzle with a sealing seat. Due to the precise metering, the media to be dispensed not only give more precise, it can also be particularly small amount submit. Furthermore, due to the valve tappet according to the invention, the metering valve according to the invention can also be maintained more easily or, in addition, it shows a lower susceptibility to wear. Further, particularly advantageous embodiments and modifications of the invention will become apparent from the dependent claims and the following description.
  • the positioning element is arranged on the actuator pressure surface.
  • the actuator pressure surface is preferably located on a free end face at one end of the push rod.
  • the push rod according to the invention may have an actuator piston arranged on the push rod, on the bottom or end face of which the actuator pressure surface with the positioning element is located.
  • the actuator piston can be designed as a pressure plate. In this case, it has a small thickness in the longitudinal direction of the push rod relative to the diameter of the Anyaktellers.
  • the actuator piston may be formed on the end side of the push rod, wherein the actuator pressure surface is located at the free end face.
  • a variant with a front-side actuator-pressure surface is particularly useful when the actuator acts on the plunger in the direction of the plunger tip, hereinafter referred to as the ejection direction, and a restoring force in the opposite direction, i. in this case in the direction of the Aktuatorkolbens, hereinafter also referred to as the withdrawal direction acts.
  • the actuator pressure surface can also extend over the bottom surface of the actuator piston, ie, the surface of the actuator piston facing the tappet tip, or be formed by this bottom surface.
  • the positioning element can advantageously be arranged on the actuator pressure surface extending over the bottom surface.
  • the actuator piston is preferably arranged in this case in a central region on the push rod, wherein the actuator pressure surface is located on the side of the Aktuatorkolbens facing the plunger tip. This variant is particularly useful when the actuator on the plunger in the opposite direction of the plunger tip, ie in the return direction, acts and a restoring force, for example, a spring element, in the direction of the plunger tip, ie in the ejection direction, acts.
  • the positioning element of the push rod has a projection or a projection or is preferably designed as such.
  • the positioning element can engage, for example, in a preferably fork-shaped actuator. As a result, a sufficient fixation of the push rod is achieved in the direction of rotation.
  • the projection serves as a kind of "positioning nose" which is held in position, for example, by the two fork-shaped ends of an actuator
  • the fork-shaped actuator can, for example, have on its push-rod-facing underside a pressure rocker, which is preferably formed on both ends of the actuator
  • the interaction of actuator and push rod is uniform with respect to the force effect due to a rounded shape of the contact pressure rocker of the actuator on the push rod and wear, because the force of the actuator is transmitted to the push rod evenly and always distributed over a large area.
  • the positioning element in the axial direction (direction of the longitudinal axis of the push rod) have a height of at most 3.5 mm, preferably of at most 1 mm.
  • the height in the axial direction is minimally 0.5 mm, preferably at least 1 mm.
  • the positioning element preferably has a width of maximally 2 mm, particularly preferably of at most 1.85 mm.
  • the width in the circumferential direction is preferably at least 0.5 mm, more preferably at least 1.85 mm.
  • the positioning element preferably has a length of at most 2.3 mm, preferably of at most 1, 1 mm.
  • the length in the radial direction is preferably at least 0.5 mm, more preferably at least 1.1 mm.
  • the positioning element may preferably have a base area of not more than 9.5 mm 2 , more preferably of not more than 1.9 mm 2 .
  • the base area is preferably at least 0.78 mm 2 , more preferably at least 1, 9 mm 2 .
  • the toothing element or positioning element may have a recess or be formed as a recess.
  • the recess may be formed, for example, as a recess or as a continuous recess extending in the axial direction through the entire piston.
  • the positioning element could also have any other shape, e.g. a depression and a projection.
  • the push rod in the case of a multi-part valve tappet
  • a plunger tip can be detachably mounted on the external thread.
  • the external thread is preferably suitable for a M1, 6 thread.
  • the plunger tip on a ball at its facing the sealing seat (facing away from the push rod) end offers the advantage that it can be produced technically advantageous and thus low and of high quality manufacturable.
  • the plunger tip is designed by a spherical shape so that at the moment of closing the best possible form fit between the valve seat and plunger tip is present.
  • the ball may preferably comprise at least one of the following materials: zirconia ceramic, alumina ceramic, sapphire, ruby, diamond, polycrystalline diamond, polycrystalline cubic boron nitride, cemented carbide, rubber.
  • a grub screw can be arranged as a coupling element between the push rod or plunger tip and the ball, wherein the grub screw be screwed into an internal thread of the push rod or plunger tip and can form a contact surface for the ball.
  • an adhesive may be introduced in addition to fill existing between grub screw and ball cavities.
  • the tappet tip can have an internal thread, which serves in a region pointing toward the pushrod to screw the tappet tip onto a matching external thread of the pushrod. In a pointing in the direction of the ball or tip (or the valve seat) end portion of the internal thread then the grub screw can be screwed, which forms the contact surface for the ball.
  • the plunger tip may, preferably at its end facing away from the push rod end, have a toothing which is designed such that a tappet tip change tool can be brought into engagement with it.
  • the special design of the plunger tip with a toothing allows easier replacement of a worn plunger tip and ensures safe installation of a new plunger tip.
  • the toothing on the end facing away from the push rod end may be formed in a star-shaped in a plane perpendicular to the longitudinal axis cross-sectional plane and arcuately concave notches or notch-like recesses.
  • the toothing is designed such that with her a tappet tip change tool can be brought into engagement with cylindrical pin elements as coupling elements.
  • the pins engage in the circular arc-like concave notches and ensure easy and reliable assembly and disassembly of a plunger tip.
  • the concave notches have the additional advantage over a normal hex or the like that they form relatively large flow areas for the medium to be dispensed.
  • the viscous medium has an adhesive or an adhesive mass.
  • the valve tappet according to the invention is particularly well suited for the requirements with regard to strength and maintainability occurring in the metering of adhesive masses, since on the one hand precise metering, in particular of viscous media, is made possible and, on the other hand, the valve lifter has been designed for ease of maintenance. Facilitated maintenance is particularly important in the metering of the named materials, which often leads to wear or malfunction of the operation of the metering valve.
  • the metering valve may be designed according to a special embodiment such that the plunger tip of the valve stem in the idle state of the metering valve, as stated above, forms a tight positive connection with the sealing seat. This ensures a seal of the valve against inadvertent leakage of a medium to be metered.
  • the sealing seat then serves, as described, as a stop for the plunger movement.
  • the plunger tip of the valve stem in the idle state of the metering valve may also be positioned at a distance from the sealing seat.
  • the dosing material is retained in the "closed” state of the valve in that the dosing agent is too viscous to escape through the remaining gap between the ram tip and the valve seat.Also, with such an "open" system for viscous dosing agents, it is not mandatory Required that the valve lifter with the tappet tip strikes the valve seat in the direction of ejection. Nevertheless, the aforementioned signs of wear can occur here as well.
  • FIG. 1 shows a cross section of a metering valve according to a first embodiment of the invention
  • FIG. 2a shows a perspective view and FIG. 2b shows a side view of a fork-shaped actuator according to the first exemplary embodiment of the invention
  • FIG. 3 is a side view of a valve lifter according to the first embodiment of the invention.
  • FIG. 4 shows a perspective view of a push rod of a valve lifter according to FIG. 3
  • FIG. 5 shows a cross section through a plunger tip of a valve lifter according to FIG. 3
  • 6a shows a cross section
  • FIG. 6b shows a perspective view of a tappet tip changing tool
  • FIG. 6c shows a plan view of the tappet tip changing tool
  • Figure 7 is a cross-section of a pushrod actuator block of a metering valve according to a second embodiment of the invention.
  • FIG. 1 shows a cross section of a metering valve 1 according to a first exemplary embodiment of the invention.
  • the metering valve 1 comprises a push rod actuator block 37, which has a control element 2, here a piezoelectric element 2 (or a so-called piezo stack), with which an actuator 3 is actuated via an actuator cam 4.
  • the actuator 3 is rotatably mounted about a bearing axis 5 extending transversely to the direction of expansion of the piezoelectric element 2 and has an actuator tip 6 at its end opposite the position of the bearing axis 5.
  • the actuator tip 6 is engaged with the upper end of a valve lifter 7.
  • the actuator tip 6 is shown in FIGS. 2 a and 2 b as part of an actuator 3 and is here fork-shaped.
  • the piezoelectric element 2 expands (with appropriate control by applying a voltage), it presses against the actuator cam 4, which here lies on a position shifted relative to the bearing axis 5 in the direction of the actuator tip 6, thus tipping the actuator 3 with it the actuator tip 6 about the bearing axis 5 down.
  • the valve stem 7 (see also FIG. 2) has on its side facing the actuator 3 a ram plate 8, also called an actuator piston or pressure plate, with an actuator pressure surface 29 and a positioning element 9 on the pressure surface 29, which engages with the actuator 3 stands.
  • the positioning element 9 is guided laterally by the fork-shaped actuator tip 6, whereby the plunger 7 is fixed against axial rotational movement about its longitudinal axis A.
  • the actuator 3 has on its underside, ie its side facing the push rod, a two-part Andruckwip- PE 30 (see Figures 2b and 3).
  • the Andruckwippe 30 is rounded on its side facing the push rod 10 of the plunger 7 side.
  • the Anyakwippe 30 rolls on the Antikteller 8 and ensures a uniform force of the actuator 3 on the push rod 10. In addition, by the rolling movement of the Antikwippe 30 greater wear both the Antiktel- lers 8 and the Aktuator dictate 6 avoided.
  • the two parts of Antikwippe 30 are formed on the respective fork elements of the actuator 3. Positioning The locking element 9 runs here in the longitudinal direction, ie in the axial direction A of the plunger 7 or the push rod 10, between the two parts of the Anyakwippe 30 and optionally also between the two adjoining the fork ends of the actuator 3.
  • the valve stem 7 is shown in FIG preferred embodiment is formed in two parts and comprises a push rod 10 (see in detail Figure 4) and a plunger tip 1 1 (see in detail Figure 5).
  • the plunger tip 1 1 has an internal thread 12.
  • At the tappet tip 1 1 facing the end of the push rod 10 is an external thread 13.
  • the two elements push rod 10 and tappet tip 1 1 are connected via the two described thread 12, 13 with each other form-fitting manner.
  • the plunger tip 1 1 has a ball 14 on its side facing away from the push rod 10 side.
  • the ball 14 is pressed at the end facing away from the push rod 10 end in the plunger tip 1 1 and positively connected against movement in the direction of the longitudinal axis A of the push rod 10 with the plunger tip 1 1.
  • the positive connection is realized via a grub screw 15, which is screwed into a pointing to the tip portion of the internal thread 13 of the plunger tip 1 1.
  • adhesive 16 may be introduced between the grub screw 15 and the ball 14.
  • This grub screw 15 advantageously also forms a stop for the lower end of the push rod 10 when the plunger tip 1 1 is later screwed onto the push rod 10.
  • the metering valve 1 further comprises a nozzle 17 with a sealing seat 18, on which the ball 14 is seated in the closed state of the valve 1 (see Figure 1).
  • a supply line 19 is attached to the side of the metering valve 1 for supplying a medium to be metered.
  • the supply line 19 is part of a nozzle holder block 38 on which the nozzle 17 is also mounted (for example by means of a screw connection).
  • the push rod actuator block 37 has a blind hole 42 with a connecting screw threaded part.
  • the nozzle holder block 38 is a matching through hole 41st
  • the two arranged in the various blocks 37, 38 holes 41, 42 are aligned during assembly. Then, the two blocks 37, 38 are screwed together with a connecting screw 40.
  • a first spring element 20 is arranged in a plunger chamber 22 in the push rod actuator block 37 around the valve plunger 7. The first spring element 20 exerts on the valve stem 7 a force in the return direction or in the opening direction of the valve.
  • the actuator 3 If the actuator 3 is moved in the direction of retraction, ie in the direction opposite to the tappet tip 11 (eg if the piezoelement contracts again), the spring force of the spring element 20 causes the tappet 7 to lift. Conversely, the actuator 3 closes by a downward movement (Expansion of the piezo element) the valve 1.
  • the spring element 20 may be mounted on an inner wall 21 of the plunger chamber 22 on a spring seat 23.
  • a second spring element 39 can additionally be arranged in the ram chamber 22 between the actuator 3 and a second spring seat 43.
  • the second spring element 39 acts as a counter force against the force exerted by the drive element 2 on the actuator 3 force.
  • the actuator 3 and the plunger 7 can be controlled very precisely.
  • a movement of the actuator 3 in the ejection direction is braked by the second spring element and thus allows a uniform actuator movement
  • the restoring force of the second spring element 39 acts such that an upward movement of the actuator 3 is performed in an upward movement of the drive element.
  • the second spring element 39 can also be omitted with sufficient dimensioning of the first spring element 20.
  • the first spring element 20 alone exerts the necessary opposing force against the force exerted by the actuator 3 on the plunger 7.
  • an arrangement with two spring elements is preferred because it can come with a change of the complete plunger without second spring element to relieve the system.
  • no counterforce would act which would hold it in the current position.
  • the position of the actuator could be lost.
  • a tearing of the piezoelectric actuator 3 could occur.
  • the actuator 3 according to a first embodiment of the invention is shown in more detail.
  • the actuator 3 has an actuator tip 6, which is fork-shaped.
  • a bearing recess 35 is formed, which is adapted to receive the bearing shaft 5.
  • the bearing recess 35 in this case comprises a bearing cam 36, which is in contact with the bearing axis 5, about which the actuator 3 is rotated. The drive or actuation of the actuator 3 via the actuating element 2 takes place, as already described.
  • the actuator lug 4 is not located at the outermost end of the actuator 3, but is offset relative to the bearing recess 35 towards the center of the actuator 3, so that a vertical movement or linear movement of the Actuator or drive element 2 is converted into a rotational or pivoting movement of the actuator 3 about the axis 5. More specifically, in the first embodiment, in a downward movement of the driving element 2, the actuator is rotated counterclockwise, that is, the plunger 7 is moved in the ejection direction in this movement of the actuator 3. The Drehz. Pivoting movement of the actuator 3 is converted into a linear movement of the push rod 10 or the plunger 7 via the already mentioned interaction of the pressure rocker 30 of the actuator 3 and the pressure plate 8.
  • FIG. 3 shows in more detail a side view of a tappet 7 according to the invention in accordance with the first exemplary embodiment of the invention.
  • the plunger 7 has as mentioned an actuator piston 8, also called plunger plate, a push rod 10, a plunger tip 1 1 and a first spring element 20, also called plunger spring, on.
  • the plunger 7 is displaced with a drive element or actuator 3 in its axial direction.
  • the rotational movement of the actuator 3 is converted into a linear movement of the plunger 7 via a pressure rocker 30 which is arranged on the actuator tip 6 of the actuator 3 and which cooperates with the actuator piston 8 of the plunger.
  • the positioning element 9 prevents unwanted rotation of the plunger 7 about its longitudinal axis.
  • the plunger spring 20 exerts a restoring force on the plunger 7, which moves the plunger 7 back to its starting position after actuation by the drive element 3.
  • the plunger tip 1 1 comprises at its end facing away from the plunger 7 a ball 14.
  • a toothing 24 is formed on the plunger tip 1 1, which serves as an approach for a plunger tip changing tool 26 (see Figure 5).
  • the toothing 24 can be realized for example by recesses 27, in which a tappet tip changing tool can engage.
  • the pushrod 10 according to a first exemplary embodiment of the invention is again shown in an enlarged perspective illustration in FIG.
  • the push rod has at its upper end an actuator piston 8 with a pressure surface 29, with which the Andruckwippe 30 (see Figure 1) of the actuator 3 (see Figure 3) is in contact.
  • the push rod 10 has a positioning element 9, which has a projection in the embodiment shown.
  • the positioning element 9 serves the push rod 10 by the fork-shaped actuator 3 and the fork-shaped actuator lead tip 6 or to fix against rotation about the longitudinal axis of the push rod 10.
  • the positioning element 9 is arranged marginally or eccentrically on the pressure surface 29 and preferably has a height h of 1 mm + - 0.05 mm in the axial direction, a width b in the circumferential direction of 1, 85 + - 0.05 mm, a length a in Radial direction of 1, 1 mm + - 0.02 mm and a base area of 2.0 mm 2 + - 0.2mm 2 on.
  • the positioning element 9 should be dimensioned so that it does not have too much clearance between the fork ends of the actuator 3 to prevent unwanted rotation of the push rod 10 about its longitudinal axis.
  • FIG. 5 shows in more detail the cross section of a tappet tip 11 according to the invention, which can be coupled to a pushrod 10 according to FIG.
  • the tappet tip 1 1 has, in a region pointing downwards towards the tip (in FIG. 5), an internal thread 12 matching the external thread 13 of the tappet rod 10.
  • this internal thread of the plunger tip 1 1 is only used in the upper part for screwing onto the push rod 10.
  • the lower, pointing to the tip part serves to first screw a grub screw 15 in the plunger tip 1 1.
  • a ball 14 is attached at the end facing away from the push rod 10 end of the plunger tip 1 1.
  • the ball 14 is fastened to the tappet tip 11 by a clamping force. More precisely, the ball 14 is pressed into the plunger tip 1 1.
  • the grub screw 15 serves as a stop for the ball 14 and causes a flat positive connection for the ball 14 in the direction of warming, ie in the direction of the push rod. Between the grub screw 15 and the ball 14, a filler or adhesive 16 may be additionally introduced in order to improve the positive connection.
  • the positive connection additionally causes the opposing force acting on the ball 14 to be dissipated via the positive connection when the plunger tip 1 1 strikes the valve seat or sealing seat 18 (see FIG. 1). A relative movement of the ball to the plunger 7 is thereby prevented. This achieves a better precision of the metering process.
  • FIGS. 6a, 6b and 6c show a tappet tip changing tool 26 for the tappet tip 11 according to FIG.
  • the section shown in FIG. 6a runs along the section line BB shown in FIG. 6c.
  • the tappet tip changing tool has a substantially cylindrical base body 47 and pin elements 28 disposed therein.
  • the tappet tip Removal tool 26 a countersunk screw 32 which is screwed along the cylinder axis A of the tappet tip changing tool 26 in a corresponding internal thread 33.
  • the countersunk screw 32 serves to fix the pin elements in the axial direction, ie in the direction of the cylinder axis A.
  • the pin elements 28 fix the countersunk screw 32 in the direction of rotation.
  • a commercial torque wrench can be applied.
  • the tappet tip changing tool 26 is placed on the tappet tip 1 1 for coupling with its concave side.
  • the four pin elements 28 are coupled to the toothing 24, so that the tappet tip changing tool 26 is fixed with the tappet tip 1 1 in the direction of rotation.
  • the plunger tip 1 1 by unscrewing the plunger tip 1 1 of the external thread 13 of the push rod, for example by means of a torque wrench, which is attached to the countersunk screw 32, are solved.
  • the tappet tip change tool 26 and a mounting of the plunger tip 1 1 by tightening the plunger tip 1 1 on the external thread 13 of the push rod 10 allows.
  • FIG. 7 shows a cross-section of a pushrod actuator block 37 'of a metering valve according to a second exemplary embodiment of the invention.
  • the pushrod actuator block 37 ' according to the second exemplary embodiment of the invention, like the pushrod actuator block 37 according to the first exemplary embodiment of the invention, comprises a drive element 2' (preferably a piezoelement or a piezo stack), with which an actuator 3 ' is actuated via an actuator cam 4 '.
  • a drive element 2' preferably a piezoelement or a piezo stack
  • the actuator 3 ' is again rotatably mounted about a bearing axis 5' and has at its the position of the bearing axis 5 'opposite end of an actuator tip 6'.
  • the actuator 3 'according to the second embodiment of the invention is constructed differently than the actuator 3 according to the first embodiment of the invention.
  • the actuator cam 4 'of the actuator 3' according to the second embodiment of the invention is in contrast to the actuator cam 4 of the actuator 3 according to the first embodiment of the invention at the extreme end of the actuator 3 'formed.
  • the bearing or the bearing axis 5 and the bearing recess 35 ' are located between the actuator cam 4' and the actuator tip 6 '.
  • the actuator cam 4 'and the bearing recess 35' according to the second embodiment have their position compared to the first embodiment in the longitudinal direction of the actuator 3 'exchanged.
  • the actuator tip 6' is moved in the retraction direction or in the clockwise direction, ie in the direction opposite the tappet tip (not shown in FIG. 7).
  • the direction of movement of the actuator 3 'according to the second exemplary embodiment (and thus of the entire plunger 7' according to the second embodiment) is thus opposite to the direction of movement of the actuator 3 according to the first embodiment.
  • a ram plate 8 ' also called an actuator piston or pressure plate, with a pressure surface 29' and a positioning element 9 'on the pressure surface 29', which engages with the actuator 3 ' the fork-shaped actuator tip 6 'is guided laterally, whereby the plunger 7' is fixed against an axial rotational movement .
  • the actuator piston 8 ' is not arranged at an outer end of the push rod 10' but to the middle of the push rod 10 'out.
  • the actuator also does not engage in the Aktuatorkolben as in the first embodiment from above, ie from the tappet tip opposite side, but from below, ie from the tappet tip side facing.
  • the actuator tip 6 ' is bifurcated, similar to the first embodiment, however, the Anyakwippe 30' now facing upwards on the actuator 3 ', ie in the direction away from the plunger tip and the pressure surface 29' facing direction.
  • the actuator 3 'thus has here on its upper side, ie its side facing away from the plunger tip side, a two-part Andruckwippe 30'.
  • the Anyakwippe is on its upper side, ie the side facing away from the plunger tip side again rounded.
  • the Anyakwippe 30' rolls on the Antikteller 8 'and ensures a uniform force of the actuator 3' on the push rod 10 '.
  • a greater wear of both the Antikellers 8 'and the Aktuator dictate 6' is avoided by the rolling motion of Antikwippe 30 '.
  • the two parts of An réellewippe 30 ' are formed on the respective fork elements of the actuator 3'.
  • the positioning element 9 ' extends here in the longitudinal direction, ie in the axial direction of the push rod 10', between the two parts of the Andruckwippe 30 'and optional also between the two adjacent ends of the actuator 3 '.
  • a fixation of the push rod 10 ' is achieved or improved against rotation about its longitudinal axis.
  • a first spring element 20 ' is arranged in a plunger chamber 22' around the valve stem 7 'around.
  • the first spring element 20 ' exerts a force in the closing direction or in the ejection direction on the valve tappet 7'. It acts as a counterforce against the actuator force and thus allows precise control of the plunger 7 'by the actuator 3'.
  • the spring force of the first spring element 20 subsequently effects a settling or resetting of the tappet 7'. Conversely, the actuator 3 'opens the valve by moving upwards. Furthermore, the spring force of the first spring element 20 'inhibits the upward movement of the plunger or slows it down, so that a uniform linear movement of the plunger 7 is achieved.
  • the first spring element 20 may be mounted on the upper end of the plunger chamber 22 'on a first spring seat 23'.
  • a second spring element 39 ' is arranged in the plunger chamber 22' between the actuator 3 'and a second spring seat 43'. The second spring extends around the first spring 20 'around.
  • the second spring seat 43 ' is disposed at the upper end of the plunger chamber 22'.
  • the spring element 43 ' acts as a counterforce against the force exerted by the drive element 2' on the actuator 3 '.
  • the actuator 3 'and the plunger 7' can be controlled very precisely.
  • the plunger chamber 22 ' has at its upper end also a blind hole-like recess 44', which 'accommodates the upper plunger end, ie the end of the plunger 7 opposite the plunger tip and a margin for the linear movement of the plunger 7' allowed.
  • the bumper actuator block 37 ' according to a second embodiment of the invention, similar to the bumper actuator block 37 according to a first embodiment of the invention on its underside, ie the side facing the nozzle holder block (not shown) have a blind hole 42' with a connecting screw thread.
  • the pushrod actuator block 37 ' may be bolted to a nozzle holder block 38 as described in the first embodiment to form a metering valve V according to a second embodiment of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Lift Valve (AREA)

Abstract

L'invention concerne une tige de poussoir (10) destinée à un poussoir de soupape (7) d'une soupape de dosage (1). La tige de poussoir (10) s'étend dans une direction longitudinale le long d'un axe longitudinal (A). La tige de poussoir (10) comprend une surface de pression d'actionneur (29) et comporte un élément de positionnement (9) de façon excentrique par rapport à l'axe longitudinal (A) de la tige de poussoir (10). L'invention concerne en outre une pointe de poussoir (11) destinée à un poussoir de soupape (7). La pointe de poussoir (11) comporte à une de ses extrémités un filetage intérieur (12) destiné à accoupler la pointe de poussoir (11) à un filetage extérieur (13) d'une tige de poussoir (10). En outre, il est prévu un poussoir de soupape (7), destiné en particulier à une soupape de dosage (1). Enfin, l'invention concerne une soupape de dosage (1), destinée en particulier à délivrer de très faibles quantités de substance dosées.
PCT/EP2014/062835 2014-06-18 2014-06-18 Soupape de dosage pourvue d'un poussoir de soupape Ceased WO2015192896A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2014/062835 WO2015192896A1 (fr) 2014-06-18 2014-06-18 Soupape de dosage pourvue d'un poussoir de soupape
TW104119649A TW201600775A (zh) 2014-06-18 2015-06-17 具有閥挺桿的計量閥

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/062835 WO2015192896A1 (fr) 2014-06-18 2014-06-18 Soupape de dosage pourvue d'un poussoir de soupape

Publications (1)

Publication Number Publication Date
WO2015192896A1 true WO2015192896A1 (fr) 2015-12-23

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Country Status (2)

Country Link
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WO (1) WO2015192896A1 (fr)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN110833969A (zh) * 2018-08-18 2020-02-25 罗天珍 逆止阀隔断撞针式喷射点胶阀
DE102018131567A1 (de) * 2018-12-10 2020-06-10 Vermes Microdispensing GmbH Dosiersystem und Verfahren zur Steuerung eines Dosiersystems
CN114029582A (zh) * 2021-12-03 2022-02-11 安兴精密(深圳)有限公司 一种基于高频点锡膏的无挂胶无溢胶的压电锡膏阀
EP4245135A1 (fr) 2022-03-16 2023-09-20 Bayer AG Mise en oeuvre et documentation d'une application de produits phytosanitaires

Families Citing this family (1)

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CN109158256A (zh) * 2018-07-31 2019-01-08 欣辰卓锐（苏州）智能装备有限公司 一种全自动智能点胶机

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US3190564A (en) * 1963-03-11 1965-06-22 Atlas Copco Ab Spray coating apparatus for spraying liquid coating material under high pressure
FR2053425A1 (fr) * 1969-07-08 1971-04-16 Tunzini Sames
US4951917A (en) * 1989-12-06 1990-08-28 Slautterback Corporation Dynamic response time for electromagnetic valving
US6182908B1 (en) * 1999-11-22 2001-02-06 Spraying Systems Co. Solenoid operated heated liquid spray device
WO2004078361A1 (fr) * 2003-03-04 2004-09-16 Nordson Corporation Composants antiadherents pour dispositif d'application de matiere
WO2013017368A1 (fr) * 2011-07-29 2013-02-07 Vermes Microdispensing GmbH Système de dosage et procédé de dosage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190564A (en) * 1963-03-11 1965-06-22 Atlas Copco Ab Spray coating apparatus for spraying liquid coating material under high pressure
FR2053425A1 (fr) * 1969-07-08 1971-04-16 Tunzini Sames
US4951917A (en) * 1989-12-06 1990-08-28 Slautterback Corporation Dynamic response time for electromagnetic valving
US6182908B1 (en) * 1999-11-22 2001-02-06 Spraying Systems Co. Solenoid operated heated liquid spray device
WO2004078361A1 (fr) * 2003-03-04 2004-09-16 Nordson Corporation Composants antiadherents pour dispositif d'application de matiere
WO2013017368A1 (fr) * 2011-07-29 2013-02-07 Vermes Microdispensing GmbH Système de dosage et procédé de dosage

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110833969A (zh) * 2018-08-18 2020-02-25 罗天珍 逆止阀隔断撞针式喷射点胶阀
DE102018131567A1 (de) * 2018-12-10 2020-06-10 Vermes Microdispensing GmbH Dosiersystem und Verfahren zur Steuerung eines Dosiersystems
US12492930B2 (en) 2018-12-10 2025-12-09 Vermes Microdispensing GmbH Metering system and method for controlling a metering system
CN114029582A (zh) * 2021-12-03 2022-02-11 安兴精密(深圳)有限公司 一种基于高频点锡膏的无挂胶无溢胶的压电锡膏阀
EP4245135A1 (fr) 2022-03-16 2023-09-20 Bayer AG Mise en oeuvre et documentation d'une application de produits phytosanitaires
WO2023174827A1 (fr) 2022-03-16 2023-09-21 Bayer Aktiengesellschaft Mise en oeuvre et documentation de l'application de produits de protection des cultures

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