WO2009080633A1 - Sonde d'écoulement pour milieux fluides - Google Patents

Sonde d'écoulement pour milieux fluides Download PDF

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Publication number
WO2009080633A1
WO2009080633A1 PCT/EP2008/067668 EP2008067668W WO2009080633A1 WO 2009080633 A1 WO2009080633 A1 WO 2009080633A1 EP 2008067668 W EP2008067668 W EP 2008067668W WO 2009080633 A1 WO2009080633 A1 WO 2009080633A1
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WO
WIPO (PCT)
Prior art keywords
flow sensor
sensor element
sensor according
sensor
housing
Prior art date
Application number
PCT/EP2008/067668
Other languages
German (de)
English (en)
Inventor
Robert Buck
Original Assignee
Robert Buck
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 Robert Buck filed Critical Robert Buck
Publication of WO2009080633A1 publication Critical patent/WO2009080633A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/22—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
    • G01F1/24—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters with magnetic or electric coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/22—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
    • G01F1/26—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters of the valve type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material

Definitions

  • the invention relates to a flow sensor for fl uid media with a mounted in a housing movement body, which at least partially protrudes into the fluid medium or comes into contact with this and against the force of gravity or a restoring force flow-dependent in its position relative to a sensor element variable and the sensor element Part of a non-contact position detecting device, wherein the housing has an inlet and an outlet channel for the fluid medium, according to the preamble of patent claim 1.
  • Flow sensors can be used in a variety of applications. Thus, applications in the field of process engineering or machine tools are conceivable.
  • the flow sensors serve the flow or the flow velocity of a fluid medium, for.
  • air, water, oil, lubricant or the like to measure, so that appropriate monitoring, control and monitoring tasks can be solved.
  • WO 2005/124291 Al has been proposed to provide a projecting into the flowing medium lifting body, the lifting body movably guided on a housing and depending on the flow of the medium to be monitored against the Restoring force of a arranged between the housing and the lifting element return element is movable.
  • the sensor element is preferably as a non-contact proximity sensor, for. B.
  • the return element which is located between the housing and the lifting body may be formed as a mechanical, magnetic or electromagnetic element, in the simplest case, a spring is used, against the spring force of the lifting body is deflected by the flow of the medium.
  • the lifting body has a circumferential collar, said collar is formed so that the flow sensor additionally has the function of a check valve.
  • the flow sensor instead of a check valve present in a water supply system, the flow sensor can be screwed into the connecting piece of a pipe already provided for the check valve.
  • a cylindrical section is formed on the lifting body according to the prior art between the projecting in the installed state in the tube end of the lifting body and a circumferential collar.
  • a magnetic proximity switch is used as the sensor element, wherein a permanent magnet is arranged in the lifting body. If according to the teaching of WO 2005/124291 A1 the lifting body is moved in the direction of the housing due to a present flow of the medium to be monitored, this leads to a reduction in the distance between the magnetic proximity switch and the permanent magnet, which triggers a switching signal.
  • GM R cells Giant Magnetor Resistor
  • the housing is preferably cylindrical, wherein the lifting body is movably guided in the housing. With appropriate flow conditions, the lifting body moves in the direction of the housing outside, against the restoring force of a spring located there.
  • the flow sensor is attached to the lifting body opposite end portion on or in the housing. This results in a relatively large distance between the actual sensor element and the lifting body having a permanent magnet. At low flow rates, the lifting body is only deflected by a small amount with the result that no sufficient measuring signal is available and the measuring accuracy is insufficient.
  • an object of the invention to provide an advanced flow sensor for fluid media with a mounted in a housing movement body and with a sensor element, which is a has higher measurement accuracy, especially at low currents and small deflections of the moving body. Furthermore, a light and secure adjustment and adjustability of the sensor element should be ensured.
  • the sensor element in the region of the inlet channel at a predetermined distance to the moving body, not on the installation side of the moving body, but on the opposite, deviating from the prior art side.
  • the GM R-Messzel le is arranged axially to H ubzi, with lower requirements, other positional relationships are possible.
  • the sensor element in particular the GM R measuring cell, is arranged on or in the housing in the region of the inlet channel.
  • the measuring cell with a correspondingly thin-walled housing section z. B. are fastened cohesively on the outside.
  • a blind hole can be formed in the housing into which a sensor with a corresponding measuring cell is screwed.
  • the sensor element can be arranged in reaching into the inlet channel.
  • the sensor element instead of a blind hole
  • the z. B. is designed as a lifting body, easily adjustable for calibration purposes.
  • the sensor element is arranged at a predetermined distance from the inflow side of the movement or lifting body which comes into contact with the fluid medium and essentially opposite this side. This results in the desired greater approximation between moving or lifting body and the sensor element, in particular with small deflections of the moving or lifting body, in particular at low flow and flow rates of the fluid medium.
  • the movement or lifting body may have a stop surface for closing an opening located between inlet and outlet channel, so that a check valve or a check valve is produced in a similar form as in the prior art.
  • the movement or lifting body can be designed as a conical or conical valve, but also as a flap valve, wherein it is essential that a sufficient movement of the body takes place at corresponding flow conditions of the fluid medium in order to detect the flow or flow changes safely.
  • At least one permanent magnet is located, which provides the magnetic field detected by the sensor element.
  • the sensor element can be designed as an inductive proximity switch or, in particular, a magnetic measuring cell.
  • the permanent magnet and the magnetic measuring cell are at least in the state of greatest approximation, i. H. with closed valve or closed flap, net angeord on a common axis.
  • the common axis can here correspond to the longitudinal axis of the moving or lifting body or run parallel to this. At least the coming into contact with the fluid medium portion of the moving or lifting body itself may have permanent magnetic properties, so that it is not necessary to embed a discrete permanent magnet in the moving or lifting body or to fix there.
  • In one embodiment of the invention may be located on the upstream side of the moving or lifting body opposite section another permanent magnet in or on the moving or lifting body or it may also have this section permanent magnetic properties.
  • the distance between the further permanent magnet or the corresponding movement or lifting body section and the sensor element is greater than the distance between the first permanent magnet or the corresponding movement or lifting body section and the sensor element.
  • Another sensor element can the second Permanentmag Neten or the respective movement or Hub stresses are arranged on the opposite side of the inflow side.
  • small deflections can preferably be detected by the first sensor element and larger deflections preferably by the second sensor element with a correspondingly larger overall measuring range and higher resolution.
  • At least the distance between the second sensor element and the permanent magnet (s) is adjustable for calibration purposes.
  • the predetermined distance between the sensor element and the moving or lifting body is determined in accordance with the metrological requirements such as resolution or measuring range and taking into account the properties of the respective sensor element and / or the permanent magnet.
  • the housing of the flow sensor is made of a non-magnetizable material, such as brass or aluminum, or may be made of plastic materials.
  • a sensor element having a cylindrical body or a cylindrical body portion with means for adjusting or adjustable attachment to an object. It is not assumed by a conventional attachment or adjustment by screw thread, but it is arranged on the cylinder surface of the sensor element circular wedges in the circumferential direction, wherein the object, z.
  • B. a Strömu ngssensorgephaseouse a cylindrical opening or bore is provided with corresponding Kreiskeilaus strictlyière. In concertsrichtu ng two to four circular wedges with a wedge slope in the range of substantially 1: 30 to 1: 200 can be provided.
  • the preferred GM R measuring cells which are magnetoresistive sensors, are arranged in Wheatstone bridge circuit.
  • This Wheatstone bridge circuit can be deliberately detuned by an external circuit in order to obtain an output voltage which is substantially linear with respect to the detected path change of the moving or lifting body, so that an easily processable and meaningful measuring signal is available.
  • Fig. 1 shows a longitudinal section through a flow sensor of a first embodiment with a permanent magnet in the conical section of a moving or lifting body and a measuring cell, which is arranged in a blind hole of a Z-housing, wherein the latter is in the region of the inlet channel.
  • Fig. 2 is a presen- tation similar to that of Figure 1, in which case a conical movement or H ub stresses is reset with stop collar via a spring force.
  • FIG. 3 is a sectional view through a flow sensor according to the third embodiment, wherein here a first and a second measuring cell are provided;
  • Fig. 4 is a sectional view through a flow sensor according to the fourth embodiment with an outside, z. B. materially fixed to the housing measuring cell;
  • FIG. 5 is a sectional view through a flow sensor according to the fifth embodiment similar to that of Figure 2, but here a through hole is present, in which the sensor can be arranged with measuring cell preferably by screwing;
  • FIG. 6 is a sectional view through a sixth embodiment variant of a flow sensor with a flap valve and a permanent magnet arranged therein and an external sensor with measuring cell in a standard valve tube;
  • Fig. 7 is an end view of Figure 6, seen from the plane VII-VII. a seventh embodiment with flap valve, wherein the sensor element is mounted close to the permanent magnet on the outside of the tube;
  • FIG. 8 a ninth embodiment with flap valve similar to the illustration of FIG. 8, wherein here the sensor element is inserted into a through hole in the pipe;
  • Flap valve wherein the flap valve is in a 90 ° housing and a flap made of metal is detected directly by a cohesively attached outside the housing sensor;
  • a thirteenth embodiment of a flow sensor with flap valve wherein the flap valve made of elastic material between a rigid retaining ring u nd a support ring is held, wherein here the flap is designed as a bypass valve flap and the sensor is screwed into the housing;
  • FIG. 14 an exploded perspective view of the embodiment of FIG. 14; a fourteenth embodiment of a flow sensor with
  • Flap valve wherein the flap of elastic material is held between a rigid retaining ring and a counter ring and is designed as a swing flap, and two sensors which are located both upstream and downstream of the flap in the housing and cooperate with the permanent magnet located in the flap, in addition, the flow direction is detectable;
  • FIG. 16 An exploded perspective view of the embodiment of FIG. 16;
  • a sixteenth embodiment of a flow sensor with an integrated in a housing metallic valve flap and an inductive sensor in the inlet region and a further inductive sensor in the outlet region;
  • FIG. 23 shows a perspective section of the insert part with sensor according to FIG. 21 and FIG.
  • Fig. 24 is an inclined seat valve with valve housing and housing branch, wherein two sensors are used.
  • the embodiments described below have in common that the sensor element in the form of a measuring cell, in particular a GM R-ZeIIe, not on the same installation side of the moving or lifting body is arranged, but on a quasi-opposite side.
  • This makes it possible, the distance of the moving or lifting body to the measuring cell, d. H. to minimize the sensor element, at low flow rates, so that the sensor element detects a fairly large magnetic field, with the result of an increase in measurement accuracy.
  • the sensor element at a predetermined distance from the coming into contact with the fluid medium side of the movement or lifting body substantially opposite to this side opposite. From this it can be deduced that the fluid medium is in the corresponding application of the flow sensor between the sensor element and the moving or lifting body.
  • moving or lifting bodies which each have permanent-magnetic sections or permanent magnets inserted at their opposite ends.
  • Such a quasi-standard lifting body could then be used in combination with differently arranged sensor elements application and z. B. be used optimally in the event that as small as possible movements and thus pressure fluctuations are to be detected;
  • the range of maximum movement and deflection of the moving or lifting body still a useful resolution in metrological terms is given.
  • the strength of the magnetic field of the permanent magnet and the distance to the sensor element is selected such that the GMR measuring cell used as the sensor element is preferably not operated in its non-linear saturation region.
  • the flow sensor IA according to FIG. 1 initially has a non-magnetizable housing 2, which, for. B. brass material or aluminum or a Aluminum alloy exists.
  • the housing has an inlet channel 24 and an outlet channel 25, based on the arrangement of the housing or the flow sensor 1 in a fluid circuit.
  • the housing 2 further has an opening for a screw-3, which receives a movement or lifting body 6 mounted therein.
  • a movement or lifting body 6 mounted therein.
  • the movement or lifting body 6 by means of a ring magnet 23 which is located in the screw 3, magnetically guided and biased by the resulting magnetic force of the ring magnet 23.
  • a permanent magnet 19 as an influencing element available.
  • the reaching into the inlet channel 24 section of the moving or lifting body 6 has a conical or conical shape.
  • the sensor or the sensor element 26 is fixed with measuring cell 27.
  • the moving or lifting body 6 has in the embodiment of FIG. 2 still a circumferential sealing collar 9, which comes in contact with the valve seat 10 in the closed state.
  • a first sensor element 26 and a second sensor element 28 are provided, wherein the arrangement of the sensor element 28 with the measuring cell 29 essentially corresponds to that of the prior art, ie. H.
  • the first and the second sensor element can be connected to a bridge circuit. In this case, both sensor output signals are evaluated via the bridge circuit, so that an increase in the measurement accuracy is possible.
  • the variant embodiment of a flow sensor I D according to FIG. 4 corresponds structurally to that according to FIG. 2 with the difference that the housing 2 has a smaller thickness in the region of the arrangement of the sensor element 26 with measuring cell 27 in order to effect the smallest possible distance between the measuring cell 27 and the permanent magnet 19.
  • the flow sensor IE in its embodiment according to FIG. 5 is of the basic structure with that of FIGS. 2 and 4 comparable. However, here a through-bore 21 in the housing 2 is introduced in the region of the inlet channel 24 in order to receive a screw-in sensor element 26 with a corresponding measuring cell 27. Without appreciably influencing the flow cross-section of the inlet channel 24, the spacing between the permanent magnets 19 as influencing element and the measuring cell 27 can be further reduced in this embodiment, and the response at low flow velocities can be improved. While maintaining the principle according to the invention, according to which the sensor element is arranged in the region of the inlet channel at a predetermined distance from a moving or lifting body, FIGS.
  • the flapper valve 30 according to FIGS. 6 to 9 is located inside a tube 5, which forms the housing in this embodiment.
  • the valve flap 37 can perform a film hinge 34 opening and closing movements depending on flow conditions between the inlet channel 24 and outlet channel 25 and is mounted on a retaining ring 35 and a fixing ring 36, wherein the fixing ring 36 sealingly abuts a valve seat 10 on the one hand and on the other hand with a collar 9 of the valve flap 37 is in the closed position in contact.
  • the sensor element 26 with measuring cell 27 is outside the tube 5 z. B. fixed by material connection.
  • the permanent magnet 19 as an influencing element is inserted into the valve flap 37 or there by molding with the valve material, for.
  • the valve material for.
  • the sensor element 26 with measuring cell 27 can then extend at least partially into this annular groove and be fixed there. Not only is a secure mechanical fastening of the sensor element 26 given via the annular groove 13, but the distance between the measuring cell 27 and the permanent magnet 19 in the valve flap 37 is reduced.
  • the sensor element 26 with measuring cell 27 is introduced into a through-bore in the valve tube 5 and is at least partially reaching into the medium flow M.
  • a tubular housing 5 with a flap valve 30 located therein is assumed.
  • the measuring cell 27 is located in a sensor element 26 which is fastened in the inlet channel 24 via a through-bore 21.
  • Fig. 9 shows the eighth embodiment of a flow sensor I H with flap valve 30. Again, there is a Permanentmag net 19 in or on the valve flap 37.
  • the flap valve is in the illustration of FIG. 9 inserted in the inlet channel 24 of a pipe. As shown in FIG. 10, the flap valve 30 is located in the region of the outlet channel 25.
  • the principle of the flap valve 30 is according to the examples I K and I L in Figs. 11 and Fig. 12 also in a tubular housing 5 with branch 31, so that a slanted seat of the valve flap 37 results applicable.
  • the valve seat 10 is formed on a projection 32.
  • a Sacklochbohru ng 22 is introduced, which receives the sensor element 26 with measuring cell 27 to provide the smallest possible distance between the measuring cell 27 and the permanent magnet 19 in the flapper valve 30.
  • the flow sensor I L of FIG. 11 is based on the basic structure of a flap valve, which is located obliquely in a tubular housing 5, as already explained.
  • a second sensor element 28 with a second measuring cell 29 is provided here.
  • the second sensor element 28 is in turn held in the tubular branch 31 via a screw-in part 3 and is therefore located on the quasi-opposite side of the first sensor element 26.
  • the dashed deflection position of the valve flap 37 of FIG. 11 leads to a closer approximation of the Permanentmag Neten 19 to the second measuring cell 29, so that in this case the second sensor element 28 provides an advantageously evaluable measuring signal.
  • the valve flap 37 With smaller deflections of the valve flap 37 there is a smaller distance to the first sensor element 26 with the measuring cell 27 located there, so that this measuring cell is preferably used for the evaluation.
  • a flow sensor IM of FIG. 13 there is a so-called 90 ° housing 2, which has an access closed by a screw cap 33.
  • valve flap 38 of the flapper valve 30 is made of either a metallic, especially ferritic material or provided with such a coating, so that, based on the housing 2 Jardinz Messzel le of the sensor element 28 a change in position of the flap valve 30th safely detected.
  • a flap valve 30 is inserted into a tube 5, wherein the valve flap 37 is made of an elastic material and is fixed between a rigid retaining ring 39 and a support ring 40.
  • the design and position of the support ring 40 with three support struts 41, the execution of the valve 30 and the rigid retaining ring 39 is in the illustration of FIG. 15 recognizable in perspective.
  • the sensor element 26 is in the acting as a valve housing tube 5 z. B. introduced by screwing into an existing hole there.
  • valve flap 37 is again made of an elastic material.
  • Two sensor elements 26 are respectively arranged on the inlet and outlet side of the valve flap 37 in the tube 5, wherein the valve flap 37 of the flap valve 30 is designed as a swing flap, so that in addition the flow direction can be detected.
  • the swinging flap 37 is located in the example of FIGS. 16 and 17 between two retaining rings 39 and 40 within the tube 5, wherein the support ring 40 comes to rest on the collar 9 of the tube 5 and the rigid retaining ring 39 is pressed.
  • Fig. 18 shows a fifteenth embodiment of a flow sensor IQ of a type as shown in FIG. 3 has already been explained, but here the course of the channels 24, 24a and 25 is not Z-shaped, but has a ⁇ - form.
  • the sensor element 28 can be embodied as an inductive sensor unit and is formed by a tubular damping element arranged on the rear side of the lifting body 6, which influences the inductively operating measuring cell 29.
  • Fig. 19 shows a sixteenth embodiment of a flow sensor I R.
  • a valve housing 2 with an inlet channel 24 and an outlet channel 25.
  • a valve flap 38 made of a metallic material can open and close a recess in the valve housing 2 in the flow path between inlet channel 24 and outlet channel 25. The opening position is shown by dashes.
  • a sensor element 26 extends into the inlet channel 24. This sensor element 26 is z. B. formed as an inductive sensor.
  • a second sensor element 28 is provided with a plastic protective sleeve 42 and fixed by screwing in the housing 2.
  • a sealing compound 43 fills a remaining gap between the plastic protective sleeve 42 and an insert 44.
  • a metallic sleeve 45 is provided, which does not extend to the sensitive region of the sensor 28.
  • a flow sensor IS of FIG. 20 In the seventeenth embodiment of a flow sensor IS of FIG. 20 is assumed that a similar housing construction with valve flap 38, as shown in FIG. 19 has been shown and already explained.
  • magnetically sensitive sensor elements 26 and 28 are used.
  • a permanent magnet 19 is embedded in the valve flap 38.
  • This magnetic field change can be reliably evaluated by the sensor elements 26 and 28, again on the basis of the determination of absolute values, but also by subtraction of the measurement signals.
  • the proposed embodiments of the flow sensors are particularly applicable to so-called two-wire flow meters with switching output, d. H. in such inductive resonant circuit proximity switches or GMR or AMR magnetic sensors in which the requirement can be met, according to which in the switched state, the Restspannu ng is only a fraction of the operating voltage and wherein in the locked state, the residual current is very small, thus subsequent Evaluation stages do not interpret the residual current as a measurement signal.
  • Fig. 21 shows a further embodiment of a Schrägsitzventils but with spring loaded valve flap 38, in which case a sensor 17 is not screwed into the through hole of a valve cover, but is fixed within a trained insert 44 du rch jamming.
  • the valve flap 38 is articulated via an axis 54.
  • the insert member 44 is fixed relative to the valve flap 38 in the valve housing 2 instead of a conventional valve cover.
  • the insert 44 has a recess in the manner of a blind hole for receiving the sensor 17, wherein the recess in the upper, flap-distant region is designed as a circular wedge recess 83 and in the lower, flap-near region as a cylindrical recess 84.
  • the sensor 17 has at the connection cable end a handle part 80, for example, designed as a surface knurling.
  • the following sections are designed as circular wedge 81 and cylinder 79.
  • the senor 17 is provided with a magnetic sensor 61.
  • other sensors can be used, for example, inductive sensors.
  • Fig. 22a and 22b each show a sectional view of the sensor 17 and the insert part 44 in the region of the clamping zone 86 (see FIG. 21), wherein the sensor can be adjusted and fixed by circular wedge connection technology.
  • circular wedges 81 On the lateral surface of the sensor 17 are in the example shown, three circumferentially spaced circular wedges 81. These circular wedges 81 extend over a first portion of the longitudinal axis of the sensor, wherein in a second portion of the sensor is cylindrical. It is also conceivable to extend the circular wedges 81 over the entire lateral surface of the sensor 17.
  • three circular wedges 81 with corresponding three circular wedge recesses 83 are provided on the object 82.
  • the circular spline slope may be in the range of substantially 1: 30 to 1: 200 here.
  • Fig. 22a shows a sectional view in the unclamped state.
  • z. B. by means of the handling part 80 of the sensor 17 slightly shifted in Leksachsenrichtu ng and z. B. the desired adjustment to find the window area or a work point done. If the desired window area is present and z. B.
  • the circular wedge shape as shown in FIGS. 22a and b recognizable, for example, by a logarithmic spiral writable.
  • the object to which the sensor is to be attached will have a cylindrical extension which has the circular wedges over its circumferential surface as explained.
  • the sleeve-shaped sensor would be displaceable over the cylindrical rod and fixable by rotation.
  • FIG. 23 shows a perspective section of the insert 44 with sensor 17 according to FIG. 21.
  • the circular wedge recesses 83 extend substantially in the upper part of the recess for the sensor 17 in the insert part 44.
  • the lower part is, as already explained, made cylindrical. However, it is also conceivable that Circular wedge recesses over the entire recess extending in the longitudinal direction form.
  • a sleeve which has circular wedge recesses on its inner circumferential surface. If, instead of the above-explained recess of the insert part 44, a simple blind hole is now provided for receiving the prefabricated sleeve, a receptacle for a sensor 17 with circular wedge connection technology can be provided in a simple manner by pressing the sleeve into such a blind hole.
  • a cylindrical section 79 is provided on the sensor 17, the diameter of this section can be selected at most in accordance with the clear or free diameter of the circular wedge recess.
  • the diameter of the cylindrical portion 79 is chosen to be significantly smaller than the possible free diameter. In principle, however, it is also possible to adapt the cylindrical recess 84 corresponding to this section to the diameter of the cylindrical section 79.
  • the sensor 17 has an optoelectronic display 85.
  • this display or a window of this display in the area of knurling 80 is attached.
  • other displays may be provided.
  • the displays offset by 180 ° or 90 ° in order to have the display always in view even when the sensor is rotated.
  • a display on the sensor termination in the cable region 87 may be provided, so that the display is visible from above.
  • it may be provided to terminate or cover the cable region 87 transparently so that an optoelectronic display remains visible through this transparent termination.
  • optoelectronic displays are particularly light emitting diodes into consideration.
  • Fig. 24 again shows an oblique seat valve with valve housing 2 and a housing branch. In the housing branch an insert 44 is attached, as already shown in FIG. 21 explained.
  • the insert part 44 of the sensor 17 is received, in a recess which allows a circular wedge connection with a sensor 17 in two-wire technology.
  • the insert part 23 has a guide section 88, which is oriented in the direction of the valve seat.
  • the guide portion 88 receives a longitudinally displaceable valve body 89, at its end oriented toward the valve seat, a permanent magnet 90 is located.
  • the preferably cylindrically designed valve body 89 is biased by means of a coil spring 91 in the direction of the valve seat. A change in position of the valve body 89 leads to a movement of the permanent magnet 90, which can be detected both by the sensor 17 and by a further sensor 26 analogous to FIG.
  • the valve body 89 is in the example shown in FIG. 24 executed as a spring-loaded check valve assembly.
  • valve flap non-metallic & swing flap

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Measuring Volume Flow (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

L'invention concerne une sonde d'écoulement pour milieux fluides, qui présente un corps de déplacement (6) monté dans un boîtier (2) et qui s'enfonce au moins en partie dans le milieu fluide ou entre en contact avec ce dernier et dont la position par rapport à un élément de détecteur (26) peut être modifiée en fonction de l'écoulement et en opposition à une force de rappel, l'élément de détecteur étant un système de détection de position travaillant sans contact, le boîtier (2) présentant un canal d'admission (24) et un canal de sortie (25) pour le milieu fluide. Selon l'invention, l'élément de détecteur (26) est disposé dans la zone du canal d'admission (24).
PCT/EP2008/067668 2007-12-20 2008-12-16 Sonde d'écoulement pour milieux fluides WO2009080633A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007061531.2 2007-12-20
DE102007061531 2007-12-20

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WO2009080633A1 true WO2009080633A1 (fr) 2009-07-02

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012045890A3 (fr) * 2010-10-08 2012-07-26 Ifm Electronic Gmbh Appareil de mesure de débit mécatronique
WO2014094753A1 (fr) * 2012-12-20 2014-06-26 Conti Temic Microelectronic Gmbh Système capteur et procédé de fabrication d'un système capteur
DE102013113332A1 (de) * 2013-12-02 2015-06-03 Manfred Reimann Einrichtung zur Durchflussüberwachung eines Mediums
FR3043458A1 (fr) * 2015-11-10 2017-05-12 Oxena Conseil Equipement pour l'estimation du volume de fluide circulant dans un conduit
CN114920199A (zh) * 2021-12-30 2022-08-19 北京恒合信业技术股份有限公司 磁感式流量传感器
JP7123615B2 (ja) 2018-05-08 2022-08-23 株式会社テイエルブイ ボール式サイトグラス

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DE102011004743B4 (de) * 2011-02-25 2014-03-20 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Flusssensor und Verfahren zum Erfassen eines Flusses
DE102011114858A1 (de) 2011-10-04 2013-04-04 Stefan Windisch Verfahren zur Erfassung von fluiden Strömungen in Leitungssystemen
DE102012111745A1 (de) * 2012-12-04 2014-06-05 Zf Lenksysteme Gmbh Durchflusssensor

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FR3043458A1 (fr) * 2015-11-10 2017-05-12 Oxena Conseil Equipement pour l'estimation du volume de fluide circulant dans un conduit
JP7123615B2 (ja) 2018-05-08 2022-08-23 株式会社テイエルブイ ボール式サイトグラス
CN114920199A (zh) * 2021-12-30 2022-08-19 北京恒合信业技术股份有限公司 磁感式流量传感器
CN114920199B (zh) * 2021-12-30 2024-04-09 北京恒合信业技术股份有限公司 磁感式流量传感器

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