FR2556108A1 - Method and installation for automatic regulation of the extraction of granular or pulverulent products or substances from enclosures containing them - Google Patents

Method and installation for automatic regulation of the extraction of granular or pulverulent products or substances from enclosures containing them Download PDF

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Publication number
FR2556108A1
FR2556108A1 FR8319414A FR8319414A FR2556108A1 FR 2556108 A1 FR2556108 A1 FR 2556108A1 FR 8319414 A FR8319414 A FR 8319414A FR 8319414 A FR8319414 A FR 8319414A FR 2556108 A1 FR2556108 A1 FR 2556108A1
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France
Prior art keywords
products
forces
flow
processing system
granular
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.)
Withdrawn
Application number
FR8319414A
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French (fr)
Inventor
Francois Secco
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SEQUIPAG
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SEQUIPAG
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Publication date
Application filed by SEQUIPAG filed Critical SEQUIPAG
Priority to FR8319414A priority Critical patent/FR2556108A1/en
Publication of FR2556108A1 publication Critical patent/FR2556108A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0605—Control of flow characterised by the use of electric means specially adapted for solid materials
    • 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
    • G01F1/28—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 drag-force, e.g. vane type or impact flowmeter
    • G01F1/30—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 drag-force, e.g. vane type or impact flowmeter for fluent solid material

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

Method for automatic regulation of the extraction of granular or pulverulent products and substances from enclosures containing them, by measuring the forces exerted on an inclined plate arranged on the outflow path of these products or substances, characterised in that the measurement of these forces is done by means of sensors consisting advantageously of strain gauges f which carry out a direct measurement of these forces and which are linked to a data processing system j which records and processes the set of these data and acts in consequence directly on the means of control c of the movements of the shut-off member b of the orifice through which the products flow out.

Description

La présente invention concerne un procédé et une installation pour la régulation automatique de l'extraction, à partir d'enceintes les contentant, de produits, ou matières, granuleux ou pulvérulents. The present invention relates to a method and an installation for the automatic regulation of the extraction, from enclosures containing them, of products or materials, granular or powdery.

Pour régler le débit pondéral de produits ou matières granuleux ou pulvérulents à partir d'enceintes, notamment d'enceintes de stockage les contenant, on utilise de façon classique, des systèmes ou dispositifs mesurant une pression exerc ée sur une plaque placée sur le trajet d'écoulement du produit. Par étalonnage pour un produit déter- miné, il est possible de connaitre avec une précision suffisante, le débit pondéral du produit. La mesure des efforts exercés sur la plaque est effectuée par des systèmes mécaniques usuels, faisant intervenir soit le déplacement d'un poids, soit la tension d'un ressort, ou par tout autre moyen mécanique. To regulate the weight flow of granular or powdery products or materials from enclosures, in particular from storage enclosures containing them, systems or devices are conventionally used which measure a pressure exerted on a plate placed on the path d flow of product. By calibration for a given product, it is possible to know with sufficient accuracy, the weight flow of the product. The forces exerted on the plate are measured by conventional mechanical systems, involving either the displacement of a weight or the tension of a spring, or by any other mechanical means.

Ces systèmes permettent, certes, de régler efficacement l'asservissement de la vanne de sortie mais, d'une part ce réglage n'est valable que cas par cas ; et d'autre part, ils se prêtent malaisément à l'installation d'une commande à distance. These systems allow, of course, to effectively regulate the control of the outlet valve but, on the one hand, this adjustment is valid only on a case-by-case basis; and on the other hand, they are difficult to install remote control.

Le procédé suivant l'invention permet d'écarter ces incon venients.  The method according to the invention makes it possible to eliminate these drawbacks.

Le procédé suivant l'invention est essentiellement caractérisé en ce que la mesure des efforts exercés sur la plaque que rencontre le produit en s'écoulant est effectuée au moyen de capteurs avantageusement constitués par des jauges de contrainte qui permettent de les mesurer directement et qui sont reliées à un système de traitement de données lequel enregistre l'ensemble de ces données et, en fonction de ces dernières, agit directement sur le ou les moyens de commande des mouvements de ltorgane d'obturation de la sortie par laquelle slé- coule le produit. The method according to the invention is essentially characterized in that the measurement of the forces exerted on the plate encountered by the product while flowing is carried out by means of sensors advantageously constituted by strain gauges which make it possible to measure them directly and which are linked to a data processing system which records all of this data and, as a function of the latter, acts directly on the control means or means for controlling the movements of the shutter of the outlet through which the product flows .

Le procédé conforme à l'invention peut être mis en oeuvre de façons fort différentes. The process according to the invention can be implemented in very different ways.

Suivant une forme de réalisation de l'invention, le produit extrait par gravité d'une trémie tombe sur une plaque inclinée. Cette plaque est montée, à son extrémité supérieure, sur un axe horizontal et repose, à sa partie inférieure sur une jauge de contrainte. La mesure de la variation des efforts exercés sur la jauge de contrainte, traduit la variation du couple exercé sur la plaque autour de son axe. Cette variation est caractéristique du débit pondéral pour un produit donné. L'étalonnage de l'appareil permet d'établir, pour un produit donné, la courbe de correspondance entre la variation d'efforts mesurés et le débit pondéral de produit. According to one embodiment of the invention, the product extracted by gravity from a hopper falls on an inclined plate. This plate is mounted, at its upper end, on a horizontal axis and rests, at its lower part on a strain gauge. The measurement of the variation of the forces exerted on the strain gauge, reflects the variation of the torque exerted on the plate around its axis. This variation is characteristic of the weight flow for a given product. The calibration of the device makes it possible to establish, for a given product, the correspondence curve between the variation in measured forces and the weight flow rate of product.

L'inclinaison de la plaque est calculée en fonction de la nature du produit. Dans le cas particulier de produits granuleux durs et secs, les grains viennent heurter la surface de la plaque et rebondissent pour poursuivre leur descente vers leur destination prévue. The inclination of the plate is calculated according to the nature of the product. In the particular case of hard and dry granular products, the grains strike the surface of the plate and rebound to continue their descent to their intended destination.

Une telle forme de réalisation est décrite ci-aprEs, en référence à la figure unique du dessin ci-joint, étant observé qu'il s'agit uniquement d'un exemple et que toutes autres dispositions pourraient être adoptées sans sortir du cadre de l'invention. Such an embodiment is described below, with reference to the single figure of the attached drawing, it being observed that this is only an example and that all other provisions could be adopted without departing from the scope of the 'invention.

Les grains ou autres produits stockés dans une trémie a s'écoulent par gravité à la base de la trémie. Le débit du produit est réglé par tout moyen quelconque convenable tel qu'une vanne b commandée par tout moyen approprié tel que servo-moteur ou vérin pneumatique c.  The grains or other products stored in a hopper flow by gravity to the base of the hopper. The flow rate of the product is regulated by any suitable means such as a valve b controlled by any suitable means such as servo motor or pneumatic cylinder c.

Le flux de produit libéré par la vanne vient heurter une plaque inclinée d maintenue à sa partie supérieure par tout moyen quelconque convenable tel qu'un couteau ou un axe horizontal g . A sa partie inférieure la plaque d est au contact d'une jauge de contrainte f portée par un support fixe h.The product flow released by the valve strikes an inclined plate d held at its upper part by any suitable means such as a knife or a horizontal axis g. At its lower part, the plate d is in contact with a strain gauge f carried by a fixed support h.

L'effort exercé sur la plaque par llécoulement du produit est mesuré par l'effort exercé sur la jauge de contrainte f. La correspondance entre l'effort mesuré et le débit du produit dépend, entre autres de la position de la jauge, de la nature du produit, de la hauteur de chute et de la pente de la plaque.The force exerted on the plate by the flow of the product is measured by the force exerted on the strain gauge f. The correspondence between the measured force and the product flow depends, among other things on the position of the gauge, the nature of the product, the height of fall and the slope of the plate.

La mesure électronique des modifications des efforts exer cés sur la jauge est transmise par une lignei à un système centrals de traitement de données dont le rôle est de stocker et de traiter les informations résultant de ces mesures. A partir des courbes d'étalonnage établies pour le produit considéré il est possible à tout moment de connaftre avec une bonne précision le débit pondéral du produit. The electronic measurement of the changes in the forces exerted on the gauge is transmitted by a line to a central data processing system whose role is to store and process the information resulting from these measurements. From the calibration curves established for the product in question, it is possible at any time to know the weight flow rate of the product with good precision.

Le systèmes de traitement de donnes est relié, par la ligne k, au moyen tel que vérin c de la trappe b de façon à commander dans le sens de l'ouverture ou de la fermeture les mouvements imprimés par le vérin à cette vanne ou trappe. The data processing system is connected, by line k, to the means such as actuator c of the hatch b so as to control in the opening or closing direction the movements imparted by the actuator to this valve or hatch .

Le même système, ou tout autre moyen similaire, est alimenté de façon à regrouper l'ensemble des informations relative à un ou plusieurs systèmes de régulation de débit pondéral et placé dans un ensemble permettant de piloter les systèmes de dosage à distance à partir d'un poste central de commande. The same system, or any other similar means, is supplied in such a way as to bring together all of the information relating to one or more weight flow control systems and placed in a unit making it possible to control the metering systems remotely from a central command post.

Bien entendu 1' invention n'est pas limitée à la forme de réalisation décrite et représentée mais peut donner lieu à de nombreuses variantes sans slécarter de son cadre.  Of course the invention is not limited to the embodiment described and shown but can give rise to numerous variants without departing from its scope.

Claims (5)

REVENDICATIONS 1. Procédé pour la régulation automatique de l'extraction, à partir d'enceintes les contenant, de produits ou matières granuleux ou pulvérulents, par la mesure des efforts exercés sur une plaque disposée sur le trajet d'écoulement de ces produits ou matières, caractérisé en ce que la mesure de ces efforts est effectuée au moyen de capteurs avantageusement constitués par des jauges de contrainte (f) qui effectuent une mesure directe de ces efforts et qui sont reliés à un système de traitement de données (j) lequel enregistre et traite l'ensemble de ces données et agit en conséquence directement sur le ou les moyens de commande (c) des mouvements de l'organe d'obturation (b) de l'orifice par lequel stécoulent les produits. 1. Method for the automatic regulation of the extraction, from enclosures containing them, of granular or powdery products or materials, by measuring the forces exerted on a plate disposed on the flow path of these products or materials, characterized in that the measurement of these forces is carried out by means of sensors advantageously constituted by strain gauges (f) which carry out a direct measurement of these forces and which are connected to a data processing system (j) which records and processes all of this data and acts accordingly directly on the control means or means (c) of the movements of the shutter member (b) of the orifice through which the products flow. 2. Installation pour la mise en oeuvre du procédé suivant la revendication 1, comportant une plaque inclinée disposée sur le trajet d'écoulement du produit s'boulant à partir d'une trémie ou analogue munie d'un moyen d'obturation, caractérisée en ce que la plaque (d) est maintenue en position d'une part par un axe horizontal (g) d'autre part par une jauge de contrainte (f) prévue à sa partie inférieure, relise à un système (j) de traitement de données, relié lui-meme au moyen de commande (c) de l'organe d'obturation (b) de la trémie (a). 2. Installation for the implementation of the method according to claim 1, comprising an inclined plate disposed on the flow path of the product flowing from a hopper or the like provided with a sealing means, characterized in that the plate (d) is held in position on the one hand by a horizontal axis (g) on the other hand by a strain gauge (f) provided at its lower part, connected to a system (j) for processing data, itself connected to the control means (c) of the shutter member (b) of the hopper (a). 3. Installation suivant la revendication 2, caractérisée en ce que le système de traitement de données est alimente en informations relatives à une pluralité de systèmes de régulation de débit pondd- ral. 3. Installation according to claim 2, characterized in that the data processing system is supplied with information relating to a plurality of weight flow control systems. 4. Installation suivant l'une quelconque des revendications 2 et 3, caractérisée en ce que le système de traitement de données est agencé de façon à piloter à distance à partir d'un poste central de commande les organes d'obturation des orifices d'écoulement des produits. 4. Installation according to any one of claims 2 and 3, characterized in that the data processing system is arranged so as to control remotely from a central control station the shutters of the orifices of flow of products. 5. Installation suivant llune quelconque des revendications 2 à 4, caractérisée en ce que l'organe d'obturation (b) de la trémie (a) consiste en un moyen tel que trappe ou vanne, commandé par un moyen tel que servo-moteur ou vérin (c).  5. Installation according to any one of claims 2 to 4, characterized in that the shutter member (b) of the hopper (a) consists of a means such as hatch or valve, controlled by a means such as servo motor or cylinder (c).
FR8319414A 1983-12-05 1983-12-05 Method and installation for automatic regulation of the extraction of granular or pulverulent products or substances from enclosures containing them Withdrawn FR2556108A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8319414A FR2556108A1 (en) 1983-12-05 1983-12-05 Method and installation for automatic regulation of the extraction of granular or pulverulent products or substances from enclosures containing them

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Application Number Priority Date Filing Date Title
FR8319414A FR2556108A1 (en) 1983-12-05 1983-12-05 Method and installation for automatic regulation of the extraction of granular or pulverulent products or substances from enclosures containing them

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FR2556108A1 true FR2556108A1 (en) 1985-06-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380504A1 (en) * 1987-08-04 1990-08-08 REUTER, Peter Adam Flow line weighing device
FR2643392A1 (en) * 1989-02-20 1990-08-24 Truetzschler & Co METHOD AND DEVICE FOR MEASURING, ADJUSTING AND CONTROLLING FLOW RATE FLOW OF FLYING FIBERS
WO2019168472A1 (en) * 2018-02-28 2019-09-06 Abrasive Engineering Pte Ltd Media dosage unit for shot peening, method of using the unit for shot peening and method of making the unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872074A (en) * 1956-09-04 1959-02-03 B I F Ind Inc Feed controlling apparatus
FR1597327A (en) * 1968-10-10 1970-06-22
FR2024086A5 (en) * 1969-09-26 1970-08-21 Kajiura Hiroshi
GB2105162A (en) * 1981-07-22 1983-03-23 Union Carbide Corp Granules applicator
EP0089058A2 (en) * 1982-03-16 1983-09-21 Bühler AG Method and device for regulating a variable, and application of the method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872074A (en) * 1956-09-04 1959-02-03 B I F Ind Inc Feed controlling apparatus
FR1597327A (en) * 1968-10-10 1970-06-22
FR2024086A5 (en) * 1969-09-26 1970-08-21 Kajiura Hiroshi
GB2105162A (en) * 1981-07-22 1983-03-23 Union Carbide Corp Granules applicator
EP0089058A2 (en) * 1982-03-16 1983-09-21 Bühler AG Method and device for regulating a variable, and application of the method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380504A1 (en) * 1987-08-04 1990-08-08 REUTER, Peter Adam Flow line weighing device
EP0380504A4 (en) * 1987-08-04 1991-01-09 Peter Adam Reuter Flow line weighing device
FR2643392A1 (en) * 1989-02-20 1990-08-24 Truetzschler & Co METHOD AND DEVICE FOR MEASURING, ADJUSTING AND CONTROLLING FLOW RATE FLOW OF FLYING FIBERS
US5159840A (en) * 1989-02-20 1992-11-03 Truzschler GmbH & Co. KG Method and apparatus for measuring, regulating and controlling the quantity of fiber tufts in flight
WO2019168472A1 (en) * 2018-02-28 2019-09-06 Abrasive Engineering Pte Ltd Media dosage unit for shot peening, method of using the unit for shot peening and method of making the unit

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