EP1782934B1 - Vorrichtung zur Herstellung von Produkten wie Beton oder Mörtel - Google Patents

Vorrichtung zur Herstellung von Produkten wie Beton oder Mörtel Download PDF

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Publication number
EP1782934B1
EP1782934B1 EP06123346A EP06123346A EP1782934B1 EP 1782934 B1 EP1782934 B1 EP 1782934B1 EP 06123346 A EP06123346 A EP 06123346A EP 06123346 A EP06123346 A EP 06123346A EP 1782934 B1 EP1782934 B1 EP 1782934B1
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EP
European Patent Office
Prior art keywords
low level
mixer
hopper
control
mixing
Prior art date
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Application number
EP06123346A
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English (en)
French (fr)
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EP1782934A1 (de
Inventor
Luc Courtes
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.)
Lancy Mixjet SAS
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Lancy Mixjet SAS
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Publication of EP1782934A1 publication Critical patent/EP1782934A1/de
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Classifications

    • 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
    • B28C7/02—Controlling the operation of the mixing
    • B28C7/028—Controlling the operation of the mixing by counting the number of revolutions performed, or by measuring the mixing time
    • 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
    • B28C7/02—Controlling the operation of the mixing

Definitions

  • the present invention relates to a device for preparing a product such as concrete or mortar comprising a mixing tank equipped with a kneader adapted to be rotated by drive means, a receiving hopper for the kneaded product , introduction means for introducing into said hopper the kneaded product from the mixing tank, these introduction means being adapted to adopt a drainage configuration allowing the introduction into the hopper of the kneaded product and a rest configuration, means for detecting a low level of product in the hopper, an actuating mechanism capable of passing the means for introducing the idle configuration to the emptying configuration, and control means for the driving means and the actuating mechanism.
  • the preamble of claim 1 is disclosed by the FR 2843313 .
  • the document FR 2 843 313 mentioned above proposes equipping the hopper with means for detecting a predetermined low level, which are coupled to means for controlling the automatic opening of an introduction flap.
  • the object of the invention is to overcome these disadvantages by proposing a simple and reliable system of use.
  • control means comprise a timing control able to control a drive of the mixer for a given mixing time and an actuation command able to control the passage of the introduction means into the configuration of the mixer. draining when said mixing time has elapsed and that said low level is detected, that the drive means are able to drive the mixer to a kneading speed and at a reduced speed, lower than said kneading speed, and that the time control comprises a kneading command, able to control the drive of the kneader at the kneading speed during the kneading time determined and a slow stirring command able to control driving the mixer at the reduced speed after the expiration of said mixing time.
  • the passage of the introduction means to their emptying configuration is allowed only when, on the one hand, the low level in the hopper is detected and that, on the other hand, the mixer has actually performed kneading during a determined kneading time. Consequently, if the operator has forgotten to pour the product into the mixing tank and to control the starting of the mixing, the opening will not be possible. Likewise, if he realizes that he has forgotten to reload the tank, and that he urgently pours a mixture into the mixing tank, the opening will only be allowed once the mixing has been done during the mixing. predetermined duration. This time is determined according to the parameters of the mixture, and the performance of the mixer, to obtain the desired consistency and homogeneity.
  • the operator can therefore move away periodically from the device, to focus on other tasks that management of its operation.
  • the device comprises means for detecting a critical low level and means of transporting the product contained in the hopper to an outlet of the latter, and the control means comprise a stop command of said means of transport when said low critical level is detected.
  • the means of transport and, in particular when the latter comprise a pump, for example a "Sparrow pump", to protect the latter by preventing it from running empty at the risk of deteriorate, and it sucks air, which is detrimental to the correct projection of the product.
  • the device comprises means for detecting the rest configuration of the insertion means.
  • control means are able to authorize the driving of the kneader for kneading only when the introduction means are in their rest position.
  • the device 10 of the figure 1 comprises a kneading tank 12 equipped with a kneader 14, constituted in this case by a horizontal shaft 15 which carries blades 16 and which is rotated by a motor 18 outside the tank 12.
  • Powdered material may be introduced into the mixing tank 12 through the upper opening 20 thereof.
  • the opening 20 comprises for example a grid 22, with a shearing knife 24 for the bags in which such a material is conditioned.
  • water is introduced into the mixing tank 12, for example through the opening 20.
  • the device 10 also comprises a receiving hopper 26 for the kneaded product.
  • a pump 28 for example of the type called “Sparrow pump” is connected to the lower part of the hopper 26 for the evacuation of the mixture. This pump is driven by a motor 29.
  • the mixing tank 12 partly overcomes the receiving hopper 26, the bottom 13 of the tank being partly disposed above the upper opening 27 of the hopper.
  • a hatch 30 is formed in the bottom 13 which forms a partition wall between the mixing tank and the receiving hopper.
  • the hatch 30 can be opened as shown in solid line on the figure 1 to allow the natural spillage of the product P in the tank 12 to the receiving hopper 26, under the effect of the thrust of the blades 16 of the kneader 14.
  • the hatch 30 can be closed as shown in the line interrupted on the figure 1 .
  • the hatch 30 is an example for the means for introducing the product P into the hopper, the closed position of the hatch corresponding to the rest configuration of said means, while its open position corresponds to the emptying configuration.
  • the actuating mechanism of the hatch between its closed and open configurations comprises in the example shown a hydraulic jack 32. It should be understood that any type of mechanism for operating a hatch can be used.
  • Means 34 for detecting a low level of product are arranged in the hopper. These means comprise a sensor of any conceivable type, in particular a bubbling detector (by blowing compressed air, making it possible to detect the presence of product at the output of the detector by variation of the blowing pressure), a detector of resistivity or any other known system for detecting the presence of product.
  • a sensor of any conceivable type in particular a bubbling detector (by blowing compressed air, making it possible to detect the presence of product at the output of the detector by variation of the blowing pressure), a detector of resistivity or any other known system for detecting the presence of product.
  • the detection means 34 are connected to an electronic control unit ECU ("Electronic Control Unit") by a link 134 allowing said detection means 34 to transmit to the ECU a signal when the low level is detected; that is, when the product level P present in the hopper is at most equal to the detection threshold for which the means 34 are set.
  • ECU Electronic Control Unit
  • the control unit ECU is also connected to the drive motor 18 of the mixer 14 via a link I18. This unit is still linked to the actuating mechanism 32 of the hatch 30 by an I32 connection.
  • the ECU control unit is able to control the drive of the mixer 14, the opening and closing of the hatch 30, and is aware of the detection of a low level by the means 34.
  • control unit ECU When the powdery material and the water have been poured into the mixing tank 12, the hatch 30 being closed, the operator can give control information I to the control unit ECU, for example by pressing a start button of the motor 18, in which case said unit causes the drive 14 to be driven by activation of the motor 18 at the mixing speed.
  • the mixing time can be pre-recorded in a memory zone of the ECU unit, being modifiable or not, in particular by means of a timer. Several mixing times can be pre-recorded, the device then having means for selecting one of these durations.
  • the unit ECU causes, when the information 1 is given, the activation of the engine 18 at the kneading speed for the determined kneading time and then reduces the output speed of the engine.
  • This makes it possible to ensure that, once the mixture has been correctly kneaded, and as long as the hatch 30 remains closed (the product P being above the low level in the hopper 26), the kneader is driven at a speed reduced to only slowly agitate the product to prevent it from coming into engagement.
  • a reset is carried out, for example by closing the hatch 30 or by new information I given to the control unit ECU to restart the mixer once the hatch 30 has been closed and that the product has been closed. It has been reintroduced into the mixing tank 30, so that the kneading occurs again for the desired duration.
  • the device represented on the figure 1 comprises means for detecting the rest configuration of the insertion means.
  • a position sensor or the like 36 is disposed at the edge of the opening of the wall 13 which is hidden by the hatch 30 in its closed position. This sensor detects the presence of the hatch 30 in this closed position, which corresponds to the rest position of the insertion means. Through an I36 link, this information is transmitted to the ECU control unit. This makes it possible to avoid, if the hatch 30 has not been correctly closed, to activate the drive of the mixer 14 at its kneading speed.
  • control means are able to control the emission of a warning signaling an emptying of the mixing tank.
  • the ECU control unit is connected to a signal transmitter S, by an IS link.
  • This signal may for example be of sound and / or visual type.
  • the signal transmitter S can be activated by the ECU unit at the same time as it activates the jack 32 for raising the hatch. This makes it possible to inform the operator of the emptying of the mixer, for reasons of safety and for the operator to come to refill the tank after this emptying.
  • Means 35 for detecting a critical low level are also arranged in the hopper. They may be identical to the means 34 described above.
  • These means 35 serve to detect a critical level of product P in the hopper, lower than the low level detected by the means 34.
  • This critical low level is the one from which the operation of the pump 28 is no longer ensured if the level continues. to fall.
  • the detection of this critical low level is transmitted to the ECU unit by a link 135 between the means 35 and the ECU.
  • the ECU Upon receipt of this information, the ECU emits a control signal through a link 129 between the ECU and the motor 29 of the pump 28, to stop this motor and avoid vacuum pumping.
  • the low level and the critical low level are the same level and the stop command of the transport means of the product contained in the hopper (pump 28) is triggered when the low level is detected while the means of introduction (hatch 30 or opening 130 of the tank 112 tilted described below) are in their empty configuration.
  • the introduction means normally remain in their empty configuration after emptying, as long as the operator has not put them in rest configuration to recharge the tank.
  • the device 110 shown in these figures is in this case carried on a mobile carriage, which can be coupled to a vehicle to be easily brought to a site. It therefore comprises a frame supported by wheels 50.
  • the device also comprises a mixing tank 112, with a kneader 14 similar to that of the figure 1 , and driven by a motor 18. It also comprises a receiving hopper 126 which can be equipped with a Moineau pump 28 similar to that of the device of the figure 1 .
  • the means for introducing the product into the hopper are different from those of the figure 1 . Indeed, these means comprise an opening 130 disposed in the upper part of the mixing tank 112 and a tilting mechanism of this vessel which is adapted to tilt it to bring this opening 130 above an opening of the hopper, which is its upper opening 127.
  • the tilting mechanism comprises in this case a hydraulic cylinder 132, the mixing tank being pivotally mounted about an axis A.
  • the cylinder 132 is in its activated position, in which it has tilted the tank 112 about its axis A, while it is in the inactive position on the figure 3 , in which it is seen that the tank is arranged next to the hopper 126.
  • the opening 120 for filling the tank is accessible as the opening 20 of the tank 12 of the figure 1 .
  • the opening 130 is adjacent to the opening 120, being disposed between the hopper 126 and said opening 120.
  • the ECU control unit has also been represented, broadly similar to that of the figure 1 . It is connected to the low level sensor of the hopper 34 via a link I34, to the mechanism for actuating the jack 132 for tilting the tank 112 via a link I132, to the driving motor 18 of the kneader 14 via a link I18, and, by an I136 link, to a sensor 136 detecting the positioning of the mixing vessel 112 in the rest configuration shown in FIG. figure 3 . It is also connected to the sensor 35 of critical low level by a link I35 and the motor 29 of the pump 28 by a link 129.
  • the ECU is still connected to a signal transmitter S via an IS link.
  • the operation of the device is similar to that described with reference to the figure 1 .
  • ECU control unit is connected to the various sensors and mechanisms by links, but these may be links other than wired links.
  • the control unit can also be of the electric, pneumatic or hydraulic type.
  • the positions of the sensors 34 and 35 in the hopper can be fixed or adjustable.
  • the device 10 of the figure 1 could be mobile, like that of Figures 2 and 3 , and vice versa.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Glass Compositions (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Polyurethanes Or Polyureas (AREA)

Claims (10)

  1. Vorrichtung zur Herstellung eines Produkts wie Beton oder Mörtel, umfassend einen Mischbehälter (12; 112), der mit einem Mischer (14) ausgestattet ist, welcher geeignet ist, durch Antriebsmittel (18) drehangetrieben zu werden, einen Aufnahmetrichter (26, 126) für das gemischte Produkt, Einleitmittel (30; 130), um in den Trichter (26; 126) gemischtes Produkt (P) aus dem Mischbehälter (12; 112) einzuleiten, wobei diese Einleitmittel geeignet sind, eine Entleerungsausführung, die das Einleiten des gemischten Produkts (P) in den Trichter (26; 126) ermöglicht, sowie eine Ruheausführung anzunehmen, Mittel (34) zum Erfassen eines niedrigen Produktpegels in dem Trichter, einen Betätigungsmechanismus (32; 132), der geeignet ist, die Einleitmittel (30; 130) von der Ruheausführung in die Entleerungsausführung zu überführen, sowie Mittel zum Steuern (ECU) der Antriebsmittel und des Betätigungsmechanismus,
    dadurch gekennzeichnet, daß die Steuermittel (ECU) eine Zeitsteuerung, die geeignet ist, ein Antreiben des Mischers (14) für eine bestimmte Mischdauer zu steuern, und eine Betätigungssteuerung umfassen, die geeignet ist, den Übergang der Einleitmittel (30; 130) in die Entleerungsausführung zu steuern, wenn die Mischdauer abgelaufen ist und der niedrige Pegel erfaßt ist, daß die Antriebsmittel (18) geeignet sind, den Mischer (14) mit einer Mischgeschwindigkeit und mit einer verminderten Geschwindigkeit, die geringer als die Mischgeschwindigkeit ist, anzutreiben, und daß die Zeitsteuerung eine Mischsteuerung, die geeignet ist, das Antreiben des Mischers (14) mit der Mischgeschwindigkeit während der bestimmten Mischdauer zu steuern, sowie eine Langsamrührsteuerung umfaßt, die geeignet ist, das Antreiben des Mischers mit der verminderten Geschwindigkeit nach Ablauf der Mischdauer zu steuern.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie Mittel (36; 136) zum Erfassen der Ruheausführung der Einleitmittel (30; 130) umfaßt.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Steuermittel geeignet sind, das Antreiben des Mischers (14) für das Mischen erst dann zuzulassen, wenn die Einleitmittel (30; 130) sich in ihrer Ruhestellung befinden.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Steuermittel (ECU) geeignet sind, das Aussenden eines Alarms (S), der ein Entleeren des Mischbehälters (12; 112) anzeigt, zu steuern.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie Mittel (34; 35) zum Erfassen eines kritischen niedrigen Pegels sowie Mittel (28) zum Befördern des in dem Trichter (26; 126) enthaltenen Produkts zu einem Ausgang dieses Trichters umfaßt und daß die Steuermittel (ECU) eine Steuerung zum Anhalten der Beförderungsmittel, wenn der kritische niedrige Pegel erfaßt ist, umfassen.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Mittel zum Erfassen eines kritischen niedrigen Pegels einen von den Mitteln (34) zum Erfassen eines niedrigen Pegels separaten Detektor (35) umfassen, der geeignet ist, einen unterhalb des niedrigen Pegels liegenden kritischen niedrigen Pegel zu erfassen.
  7. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der niedrige Pegel und der kritische niedrige Pegel ein gleicher Pegel sind und daß die Steuerung zum Anhalten der Beförderungsmittel (28) ausgelöst wird, wenn der niedrige Pegel erfaßt ist, während die Einleitmittel (30; 130) sich in ihrer Entleerungsausführung befinden.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Steuermittel eine Kontrolleinheit (ECU) elektronischer, elektrischer, pneumatischer oder hydraulischer Art umfassen.
  9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Einleitmittel eine Klappe (30) umfassen, die in einer Trennwand (13) zwischen dem Mischbehälter (12) und dem Aufnahmetrichter (26) angeordnet ist.
  10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Einleitmittel eine Öffnung (130), die im oberen Teil des Mischbehälters (112) angeordnet ist, sowie einen Mechanismus (132) zum Kippen des Behälters umfassen, der geeignet ist, den Behälter zu kippen, um die Öffnung über eine Öffnung des Trichters zu bringen.
EP06123346A 2005-11-07 2006-11-02 Vorrichtung zur Herstellung von Produkten wie Beton oder Mörtel Active EP1782934B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0511306A FR2892967B1 (fr) 2005-11-07 2005-11-07 Dispositif de preparation d'un melange, par exemple pour machine a projeter

Publications (2)

Publication Number Publication Date
EP1782934A1 EP1782934A1 (de) 2007-05-09
EP1782934B1 true EP1782934B1 (de) 2010-08-18

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Family Applications (1)

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EP06123346A Active EP1782934B1 (de) 2005-11-07 2006-11-02 Vorrichtung zur Herstellung von Produkten wie Beton oder Mörtel

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EP (1) EP1782934B1 (de)
AT (1) ATE477899T1 (de)
DE (1) DE602006016211D1 (de)
ES (1) ES2352210T3 (de)
FR (1) FR2892967B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3057468B1 (fr) * 2016-10-13 2021-01-29 Pl2M Crible a pentes convergentes
BE1024916B1 (nl) * 2017-06-13 2018-08-09 De Rycke Gebroeders Nv Werkwijze voor het vervaardigen van betonspecie middels een drijvende betoncentrale

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030747A (en) * 1933-01-23 1936-02-11 Machinery Company Const Timer for concrete mixers
JPS58205534A (ja) * 1982-05-26 1983-11-30 Kayaba Ind Co Ltd ミキサ車の添加剤計量注入装置
FR2843313B1 (fr) * 2002-08-09 2005-05-20 Lancy Mixjet Dispositif de preparation d'un melange, notamment pour machine a projeter

Also Published As

Publication number Publication date
FR2892967A1 (fr) 2007-05-11
ATE477899T1 (de) 2010-09-15
ES2352210T3 (es) 2011-02-16
FR2892967B1 (fr) 2008-02-08
DE602006016211D1 (de) 2010-09-30
EP1782934A1 (de) 2007-05-09

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