FR2531658A1 - Device for preparing concrete. - Google Patents
Device for preparing concrete. Download PDFInfo
- Publication number
- FR2531658A1 FR2531658A1 FR8312745A FR8312745A FR2531658A1 FR 2531658 A1 FR2531658 A1 FR 2531658A1 FR 8312745 A FR8312745 A FR 8312745A FR 8312745 A FR8312745 A FR 8312745A FR 2531658 A1 FR2531658 A1 FR 2531658A1
- Authority
- FR
- France
- Prior art keywords
- aggregates
- volumetric
- blades
- measurement
- hopper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 238000005303 weighing Methods 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000000523 sample Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000003337 fertilizer Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 235000013339 cereals Nutrition 0.000 abstract 1
- 239000002671 adjuvant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
- G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0404—Proportioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0454—Volumetric measuring devices, e.g. for consecutively delivering predetermined volumes of ingredients
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
- G01F11/284—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement combined with electric level detecting means
-
- 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
- G01F23/226—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 measuring the braking of a rotatable element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
Abstract
Description
'invention concerne la fabrication du béton. The invention relates to the manufacture of concrete.
notamment un dispositif de préparation de bétons comportant au moins un silo contenant des granulats placé au-dessus d'une trémie peseuse sous laquelle est disposé un mélangeur-malaxeur recevant les liants et adjuvants secs et hydrauliques.in particular a device for preparing concretes comprising at least one silo containing aggregates placed above a weighing hopper under which is placed a mixer-kneader receiving the dry and hydraulic binders and adjuvants.
Une centrale à béton est généralement constituée - de silos ou réservoirs permettant de stocker les granulats amenés de façon connue dans ceux-ci, - de silos contenant les liants - de silos contenant des adjuvants éventuels. A concrete batching plant is generally made up of - silos or tanks making it possible to store the aggregates brought in a known manner into them, - silos containing the binders - silos containing any adjuvants.
- d'un approvisionnement en eau.- a water supply.
- de moyens de mesure des différents composants du béton.- means for measuring the various components of concrete.
- d'un mélangeur-malaxeur assurant 1 homogénéité du béton prêt à l'emploi
Les différents composants sont dosés, avant d'être mélangés. par mesure de leur poids et/ou de leur volume selon leur nature.- a mixer-kneader ensuring 1 homogeneity of the ready-mixed concrete
The various components are dosed, before being mixed. by measuring their weight and / or their volume according to their nature.
La méthode pondérale présente des inconvénients majeurs lorsqu'il s'agit de préparer des bétons dits légers à cause des densités différentes - et faibles des granulats employés parmi lesquels on peut citer la pierre ponce, les pouzzolanes, les laitiers granulés, concassés ou bouletés. les billes de verre ,.. . . La densité de ces granulats légers varie en fonction de leur composition, de leur granulométrie, de leur teneur en eau qui est loin d'être négligeable après leur lavage préparatoire. The weight method has major drawbacks when it comes to preparing so-called light concretes because of the different densities - and low aggregates used, including pumice, pozzolans, granulated, crushed or pelletized slag. glass beads, ... . The density of these light aggregates varies according to their composition, their granulometry, their water content which is far from negligible after their preparatory washing.
Par simplification et commodité, les composants du béton sont seulement pesés : pour un même poids. les variations de volume peuvent être importantes et entrainer des écarts de qualité inacceptables. For simplicity and convenience, the concrete components are only weighed: for the same weight. volume variations can be significant and lead to unacceptable quality deviations.
Si le même poids de granulats légers occupe un volume variant de + 107.. les autres composants ayant une densité peu variable, le béton qui en résultera n'aura pas des caractéristiques constantes tant au point de vue résistance mécanique qu'au point de vue coefficient thermique. If the same weight of light aggregates occupies a volume varying from + 107 .. the other components having a variable density, the concrete which will result from it will not have constant characteristics as well from the point of view of mechanical resistance as from the point of view thermal coefficient.
L'invention a pout but d'adapter un dispositif permettant une mesure volumétrique constante des granulats, en combinaison avec la mesure de leur poids, de façon qu'à l'aide d'appareils simples, éventuellement enregistreurs, il soit possible de connaitre à tout moment la densité des granulats utilisés, de l'enregistrer automatiquement afin de la contrôler et de surveiller ainsi les quantités mises en oeuvre. Tout incident d'approvisionnement sera signalé à l'aide d'un répétiteur optique ou sonore des indications du dispositif. The invention has for its object to adapt a device allowing a constant volumetric measurement of aggregates, in combination with the measurement of their weight, so that using simple devices, possibly recorders, it is possible to know at at any time the density of the aggregates used, to record it automatically in order to control it and thus monitor the quantities used. Any supply incident will be reported using an optical or audible repeater of the device indications.
A cette fin, le dispositif selon l'invention est caractérisé par le fait que des moyens de mesure volumétrique des granulats coopèrent avec des moyens de mesure pondérale afin d'obtenir des bétons de caractéristiques prédéterminées et constantes. To this end, the device according to the invention is characterized in that means for volumetric measurement of the aggregates cooperate with means for weight measurement in order to obtain concretes with predetermined and constant characteristics.
Selon une forme de réalisation de l'invention les moyens de mesure volumétrique des granulats sont constitués par une sonde à rotation commandée, placée sous le silo des granulats. composee de pales, en bout d'un arbre moteur. ces pales étant situées à l'intérieur de la trémie peseuse. à une distance réglable de la vanne d'écoulement des granulats à laquelle ces pales sont asservies, de façon que la rotation des pales commande l'ouverture et la fermeture de ladite vanne. According to one embodiment of the invention, the means for volumetric measurement of the aggregates consist of a controlled rotation probe, placed under the silo of the aggregates. composed of blades, at the end of a motor shaft. these blades being located inside the weighing hopper. at an adjustable distance from the aggregate flow valve to which these blades are controlled, so that the rotation of the blades controls the opening and closing of said valve.
Selon une autre forme de réalisation de l'invention les moyens de mesure volumétrique des granulats sont constitués par au moins un détecteur de proximité placé sur les bords intérieurs de la trémie peseuse. According to another embodiment of the invention, the means for volumetric measurement of the aggregates consist of at least one proximity detector placed on the inner edges of the weighing hopper.
Selon une autre forme de réalisation, les moyens de mesure volumétrique des granulats sont constitués par au moins une cellule photo-électrique placée à l'intérieur de la trémie-peseuse, la partie émettrice étant séparée de la partie réceptrice de façon que le faisceau optique soit interrompu lorsque le volume des granulats dans la trémie atteint un niveau prédéterminé. According to another embodiment, the means for volumetric measurement of the aggregates consist of at least one photoelectric cell placed inside the hopper-weigher, the emitting part being separated from the receiving part so that the optical beam is interrupted when the volume of aggregates in the hopper reaches a predetermined level.
Le principal avantage apporté par l'invention réside dans la simplicité du dispositif et dans son efficacité quant à l'obtention de caractéristiques constantes des bétons produits par des centrales ainsi équipées. The main advantage provided by the invention lies in the simplicity of the device and in its effectiveness in obtaining constant characteristics of the concretes produced by plants thus equipped.
D'autres avantages ressortiront de la description faite à titre d'exemple, de formes de réalisation du dispositif et du dessin dans lequel
-'la figure i est un schéma d'une centrale à béton,
- la figure 2 est une vue schématique d'un ensemble silo-trémie-malaxeur,
- la figure 3 est une vue schématique d'un dispositif avec sonde électromécanique.Other advantages will emerge from the description given by way of example, of embodiments of the device and of the drawing in which
FIG. i is a diagram of a concrete plant,
FIG. 2 is a schematic view of a silo-hopper-mixer assembly,
- Figure 3 is a schematic view of a device with electromechanical probe.
- la figure 4 est un schéma d'un dispositif muni de cellules photo-électriques. - Figure 4 is a diagram of a device provided with photoelectric cells.
La figure 1 représente une centrale à béton constituée principalement de silos 1 placés au-dessus d'une trémie-peseuse 2, munie de moyens d'affichage et d'entregistrement des poids. se vidant par gravité dans um mélangeur-malaxeur 3 comportant des moyens d'évacuation du béton prêt à l'emploi. FIG. 1 represents a concrete plant consisting mainly of silos 1 placed above a weighing hopper 2, provided with means for displaying and recording the weights. emptying by gravity into a mixer-kneader 3 comprising means for discharging ready-mixed concrete.
Les silos 1 ont une embase conique 10, munie d'un obturateur du type casque 11, prolongée par un couloir de déversement 12 cylindrique. The silos 1 have a conical base 10, fitted with a shutter of the helmet type 11, extended by a cylindrical discharge corridor 12.
La figure 3 représente une vue en coupe de la trémie-peseuse 2 placée sous le silo 1, à l'intérieur de laquelle sont situées les ailettes 4 en bout d'un arbre moteur 5 formant une sonde permettant la mesure du volume de granulats tombant du silo 1. 3 shows a sectional view of the weighing hopper 2 placed under the silo 1, inside which are the fins 4 at the end of a motor shaft 5 forming a probe for measuring the volume of falling aggregates from silo 1.
La sonde ainsi constituée est mise en rotation par un moteur électrique entrainant un arbre vertical terminé par des pales en nombre variable dont la forme est adaptée au granulat utilisé. La sonde est mise en fonction en même t-emps que la centrale. The probe thus formed is rotated by an electric motor driving a vertical shaft terminated by blades of variable number whose shape is adapted to the aggregate used. The probe is activated at the same time as the control unit.
L'ouverture du casque 11 obturant le silo est commandée soit manuellement, soit- par un appel automatique déclenché par l'asservissement d'un meca- nisme de manoeuvre du casque 11 à la mise en fonction de la sonde. The opening of the helmet 11 closing the silo is controlled either manually or by an automatic call triggered by the servo of a mechanism for operating the helmet 11 when the probe is put into operation.
Les granulats s'écoulent dans la trémie soit simultanément, soit silo par -silo. The aggregates flow into the hopper either simultaneously or silo by -silo.
On aura pris soin au préalable de régler la hauteur des pales 4 de la sonde à l'aide de la bascule et à partir du granulat-type dont la densité a été prise pour référence. We have taken care beforehand to adjust the height of the blades 4 of the probe using the rocker and from the granulate-type whose density has been taken for reference.
Lorsque le cône, constitué par le granulat arrivant dans la trémie atteint le niveau auquel les pales 4 de la sonde a été régle, leur rotation est interrompue entrainant la fermeture des casques,
L'erreur volumétrique d'une mesure à l'autre est faible, assurant ainsi la constance des proportions choisies pour la réalisation d'un béton déterminé.When the cone, formed by the aggregate arriving in the hopper reaches the level at which the blades 4 of the probe has been adjusted, their rotation is interrupted leading to the closing of the helmets,
The volumetric error from one measurement to another is low, thus ensuring the consistency of the proportions chosen for the production of a specific concrete.
La bascule indique le poids du volume de granulats en place dans la trémie, ce qui permet, pa-r enregistrement, de connaître les consommations ainsi que la densité effective du granulat. The scale indicates the weight of the volume of aggregates in place in the hopper, which allows, by recording, to know the consumption as well as the effective density of the aggregate.
Le nombre de silos et de sondes n est pas limité de même que le nombre de sondes par silo. The number of silos and probes is not limited, as is the number of probes per silo.
La figure 4 représente une autre forme de réalisation du dispositif dans laquelle les moyens de mesure volumétrique des granulats sont constitués par au moins un oeil électronique ou détecteur de proximité remplaçant la sonde mécanique précitée. FIG. 4 shows another embodiment of the device in which the means for volumetric measurement of the aggregates consist of at least one electronic eye or proximity detector replacing the aforementioned mechanical probe.
Lorsque le niveau atteint par les granulats dans la trémie-peseuse 2' coupe le champ du rayon, la fermeture des casques 91 est déclenchée. Le détecteur de proximité est placé dans la trémie-peseuse de façon que son efficacité ne soit pas perturbée par la chute des granulats : de préférence plusieurs détecteurs sont mis en place et leur action est coordonnée avec l'ouverture et la fermeture des casques il,
Dans une autre forme de réalisation les moyens de mesure volumétrique des granulats sont constitués par une ou plusieurs cellules photo-électriques placées dans la trémie-peseuse, hors de la chute des granulats.When the level reached by the aggregates in the weighing hopper 2 'cuts the radius field, the closing of the helmets 91 is triggered. The proximity sensor is placed in the weighing hopper so that its efficiency is not disturbed by the fall of the aggregates: preferably several sensors are installed and their action is coordinated with the opening and closing of the helmets,
In another embodiment, the means for volumetric measurement of the aggregates are constituted by one or more photoelectric cells placed in the weigh hopper, outside the fall of the aggregates.
de façon que l'interruption du faisceau optique par les granulats atteignant un niveau prédéterminé entraîne la fermeture des casques 11. so that the interruption of the optical beam by the aggregates reaching a predetermined level causes the helmets 11 to close.
Il est précisé que le dispositif ainsi décrit est utilisé pour la mesure volumétrique et pondérale de tout produit de densité variable tels que grains; engrais, etc. It is specified that the device thus described is used for the volumetric and weight measurement of any product of variable density such as grains; fertilizers, etc.
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4886/82A CH648511A5 (en) | 1982-08-16 | 1982-08-16 | DEVICE FOR PREPARING CONCRETE. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2531658A1 true FR2531658A1 (en) | 1984-02-17 |
| FR2531658B1 FR2531658B1 (en) | 1987-04-17 |
Family
ID=4284257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8312745A Expired FR2531658B1 (en) | 1982-08-16 | 1983-08-02 | CONCRETE PREPARATION DEVICE |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE897505A (en) |
| CH (1) | CH648511A5 (en) |
| FR (1) | FR2531658B1 (en) |
| IT (2) | IT1163890B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0464697A2 (en) * | 1990-07-03 | 1992-01-08 | Colortronic GmbH | Process and device for dosing |
| WO2001053607A2 (en) * | 2000-01-20 | 2001-07-26 | Aggregate Research Industries, L.L.C. | Method for manufacturing concrete |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692554B (en) * | 2013-12-11 | 2016-02-17 | 王强 | A kind of withstand voltage slag charge bogey |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US851553A (en) * | 1906-03-27 | 1907-04-23 | Alvin Flavel Nims | Concrete-mixing machine. |
| US2109534A (en) * | 1935-06-27 | 1938-03-01 | Johnson Co C S | Central mixing plant |
| GB1083361A (en) * | 1965-01-19 | 1967-09-13 | Thomas Ind Automation Ltd | Apparatus including an electrode for detecting the level of a material in a container |
-
1982
- 1982-08-16 CH CH4886/82A patent/CH648511A5/en not_active IP Right Cessation
-
1983
- 1983-08-02 FR FR8312745A patent/FR2531658B1/en not_active Expired
- 1983-08-10 BE BE0/211330A patent/BE897505A/en not_active IP Right Cessation
- 1983-08-11 IT IT22513/83A patent/IT1163890B/en active
- 1983-08-11 IT IT8322616U patent/IT8322616V0/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US851553A (en) * | 1906-03-27 | 1907-04-23 | Alvin Flavel Nims | Concrete-mixing machine. |
| US2109534A (en) * | 1935-06-27 | 1938-03-01 | Johnson Co C S | Central mixing plant |
| GB1083361A (en) * | 1965-01-19 | 1967-09-13 | Thomas Ind Automation Ltd | Apparatus including an electrode for detecting the level of a material in a container |
Non-Patent Citations (2)
| Title |
|---|
| JOURNAL DE L'EQUIPEMENT ELECTRIQUE ET ELECTRONIQUE, no. 348, 1974, pages 70-73, Paris, FR; "Les applications logiques" * |
| MACHINE DESIGN, vol. 33, no. 3, février 1961, pages 124-125, Penton Inc, Cleveland, US; "Weigh-down scale simplifies mix" * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0464697A2 (en) * | 1990-07-03 | 1992-01-08 | Colortronic GmbH | Process and device for dosing |
| EP0464697A3 (en) * | 1990-07-03 | 1992-05-27 | Colortronic Gmbh | Process and device for dosing |
| WO2001053607A2 (en) * | 2000-01-20 | 2001-07-26 | Aggregate Research Industries, L.L.C. | Method for manufacturing concrete |
| WO2001053607A3 (en) * | 2000-01-20 | 2002-04-04 | Aggregate Res Ind L L C | Method for manufacturing concrete |
| US6379031B1 (en) | 2000-01-20 | 2002-04-30 | Aggregate Research Industries, Llc | Method for manufacturing concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8322616V0 (en) | 1983-08-11 |
| CH648511A5 (en) | 1985-03-29 |
| IT1163890B (en) | 1987-04-08 |
| BE897505A (en) | 1983-12-01 |
| FR2531658B1 (en) | 1987-04-17 |
| IT8322513A0 (en) | 1983-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |