WO2015032878A1 - Device for spraying a mixture and method for preparing a mixture - Google Patents
Device for spraying a mixture and method for preparing a mixture Download PDFInfo
- Publication number
- WO2015032878A1 WO2015032878A1 PCT/EP2014/068880 EP2014068880W WO2015032878A1 WO 2015032878 A1 WO2015032878 A1 WO 2015032878A1 EP 2014068880 W EP2014068880 W EP 2014068880W WO 2015032878 A1 WO2015032878 A1 WO 2015032878A1
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- WIPO (PCT)
- Prior art keywords
- mixture
- solid phase
- signal
- pump
- mixing
- Prior art date
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/53—Mixing liquids with solids using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/2123—Shafts with both stirring means and feeding or discharging means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/91—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/718—Feed mechanisms characterised by the means for feeding the components to the mixer using vacuum, under pressure in a closed receptacle or circuit system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/82—Forming a predetermined ratio of the substances to be mixed by adding a material to be mixed to a mixture in response to a detected feature, e.g. density, radioactivity, consumed power or colour
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
- B28C5/1253—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with discharging devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients
Definitions
- the present invention relates to a device for projecting a mixture
- a device for projecting a mixture comprising a pump equipped with a compression stage and a rotor, a projection lance and a mixer provided with at least one phase feed. liquid and at least one solid phase feed, said mixer having a mixing chamber, said mixing chamber comprising an output connected to an inlet of said pump compression stage, said compression stage comprising an output of said mixture connected to a first inlet of the projection lance arranged to project said mixture through a second projection orifice in an external environment, said mixer comprising at least one rotary kneading arm passing through said mixing chamber, arranged to be set in motion at a rotational speed by a motor and for kneading said solid phase with said liquid phase to form a kneading mixture, said kneading arm e comprising an eccentric screw in proiongement, extending through said outlet of the mixing chamber and ending in said compression stage of said pump, thus forming the pump rot
- This device comprises an arrival of said mixture provided by a Sparrow pump, the mixture being pumped to a projection lance connected by one of its ends to the pump, to be then projected by a nozzle placed in the extension of a second end of the spear.
- This device is used to apply a layer of a projected mixture from a liquid phase and a solid phase.
- This variation in water flow affects the quality of the mixture to be sprayed. For example, if the water flow increases, the mixture formed is too liquid and does not stick, and when projected, does not hold uniformly on the support, conversely, if the water flow decreases, the mixture formed is too thick and its projection is of lower quality since the projection of a too thick mixture compromises the uniformity of the mixing layer on the wall.
- the water flow rate may be low enough to obtain a mixture in the mixing chamber which has a high viscosity so that the rotational movement of the rotary arm is blocked at the compression chamber which can lead to a breakage of the latter which is always driven in a rotational movement.
- This risk is even higher than the mixture is characterized by a fast setting time.
- the projection devices known in the state of the art are provided with an emergency stop system for the rotation of the rotating arm, this system comprises a water flow sensor connected to a control means which controls the stopping of the rotation of the arm and therefore of the projection when the water flow passes under a predefined threshold value.
- the aim of the invention is to overcome the drawbacks of the state of the art by providing a projection device which makes it possible to guarantee a homogeneous and constant consistency of the mixture at the mixer outlet and at a constant or at least quasi-constant flow rate during the process. projection so that the projection of the mixture is as uniform as possible.
- a device as indicated at the beginning, characterized in that it comprises a control means connected to a rheological variable sensor of said mixture and to a speed regulator of said engine, said sensor being associated with said projection lance of said mixture and said speed regulator being arranged to act on said speed of rotation of the mixing arm, said control means being arranged to receive a signal transmitted by the variable sensor and to send a signal to said controller based on a value measured by the sensor.
- the consistency of the mixture is determined at any time during the projection by measuring a rheological variable value which is transmitted to the control means in the form of a signal. If this measured rheological variable value differs from a predetermined threshold value corresponding to a desired mixing consistency, the control means in turn sends a signal to the regulator which changes the rotational speed of the arm until the mixture at the end of mixing has the desired consistency.
- the projection device according to the invention allows a correction of the consistency of the mixture made during the formation of the mixture by mixing, which allows on the one hand to have a device more responsive to variations in flow rates in the liquid phase or in the solid phase, and the regulation is simpler because it involves the use of only one sensor at the level of the projection lance.
- the present invention is based on the surprising effect that the modification of the speed of rotation of the kneading arm makes it possible to maintain a homogeneous and constant consistency over time while not affecting, or at least affecting, only very little, the output flow of the mixture so that the projection of the mixture is as uniform as possible.
- control means is a proportional-integral-derivative type corrector.
- This type of regulator has the advantage of being easy to implement physically and can therefore be applied to regulate a device already in production. It also makes it possible to adapt the regulation to the evolution of parameters such as the wear of the parts of the device, such as the rotor and the stator, or the increase of the temperature in the compression stage.
- said regulator is a frequency converter and the motor is an AC motor.
- the senor is a pressure sensor, preferably a strain gauge.
- said liquid phase comprises water.
- said solid phase is a pulverulent inorganic material, in particular hydraulic material, preferably comprising at least one element chosen from the group consisting of gypsum, sand and dry cement.
- said liquid phase supply is located at a level lower than that of said solid phase supply.
- the compression stage and a lower part of the mixing chamber are constantly saturated with water so that, when kneading and pumping the mixture, there is no lumping or air bubble in the mixture.
- the invention also relates to a process comprising the preparation of a mixture of a solid phase or of a pasty phase with a liquid phase, comprising:
- a measure of at least one rheological variable of said mixture preferably the pressure, giving a first rheological variable value which is coded in a first signal
- Said mixing arm passing through said mixing chamber comprises in its extension an eccentric screw extending through an outlet of the mixing chamber connected to a mixing chamber. input of a compression stage of a pump, which eccentric screw extends through the outlet and terminates in a compression stage of a pump where said step of pumping said mixture takes place, which eccentric screw thus forming a rotor of the pump, said mixing arm controlling said second feed rate of said solid phase to said mixing chamber and said third rate of pumping said mixture
- the method is characterized in that the step of measuring said rheological variable is performed at said projection lance, said speed regulator processing said second output signal to then control said motor rotating said mixing arm and regulate said rotational speed of said mixing arm and inducing a variation simultaneously of said second feed rate of said solid phase and said third flow rate of said mixture.
- this method further comprises a first comparison step in which said first signal is compared with a first reference signal corresponding to a second reference rheological variable value with the aid of a first comparison calculator of said first reference signal. control inputting said first signal and said first reference signal to output said second signal and send it to said speed controller.
- said second signal corresponds to a difference calculated between, on the one hand, said first rheological variable value and, on the other hand, said second reference rheological variable value, said second signa! being processed at the input of said speed regulator which decodes said second signal and translates it into an output simultaneously of said second feed rate of said solid phase and said third flow rate of said mixture.
- the step of processing said second signal by said speed controller is a proportional-integral-derivative type regulation step.
- said variation of said second feed rate of said solid phase and said third pumping rate of said mixture is carried out until said at least one rheological variable reaches a predetermined value.
- said at least one rheological variable of said mixture is the pressure
- Figure 1 schematically shows the projection device according to the present invention.
- This device is particularly intended to form a mixture, for example plaster, from a liquid phase, for example water, and a solid phase, for example gypsum, and to project this mixture so as to form an even layer of this mixture for example on a wall.
- a mixture for example plaster
- a liquid phase for example water
- a solid phase for example gypsum
- the liquid phase is water and the solid phase is a pulverulent mineral material, in particular hydraulic, preferably comprising at least one element selected from the group of gypsum, sand, dry cement.
- the kneader may be fed with a pasty phase instead of a solid phase
- the pasty phase is a moist mineral material comprising at least one element selected from the group of wet cement, slaked lime, and mortar.
- said mixture has a liquid phase: solid phase ratio of between 0.3 and 1, preferably between 0.4 and 0.8, advantageously between 0.5 and 0.7.
- the projection device 1 of a mixture comprises a kneader 2 divided into a lower part corresponding to a kneading chamber 4 and an upper part 3 situated above the kneading chamber 4 and traversed by an inlet for a solid phase 5, connected to a first solid phase feed 6, and an inlet for a liquid phase 7 connected to a second liquid phase feed 8, the orifice the inlet of the liquid phase 7 being placed at a level lower than that of the inlet of the solid phase 5.
- Each of the feeds 6, 8 may optionally be connected to a container 9 which may be a hopper 9 or a tank 9 '.
- Said mixing chamber 4 is traversed by a first mixing outlet orifice 10 connected to a compression stage of a pump 11 provided with a second mixing outlet orifice 12 connected to an inlet port 13 of a lance 14 of projection.
- This lance is arranged to project the mixture from a second outlet orifice 15 connected to a projection nozzle 16 on a wall 17.
- the kneader 2 is provided with a rotary kneading arm 18 arranged to pass through the upper part 3 and the kneading chamber 4, said kneading arm possibly being provided with one or more blades 19 and extended at a first end. 20, facing the mixing outlet port 10, by an eccentric "pigtail" screw 21 which extends through the mixing outlet port 10 to terminate in the compression stage 1 1 of the pump and form a Sparrow type pump comprising a rotor which is the eccentric screw and a stator which is the compression stage.
- a double chain of sealed cavities also called "cells" to the volume defined by the dimensions and shapes of the rotor and the stator is formed.
- the cells progress along the axis of rotation of the eccentric screw of the pump, which transfers the mixture pumped from the outlet of the mixing chamber of the pump to the outlet of the mixture.
- the stator may comprise an inner wall coated with a rubberized material, this pump being arranged to simultaneously pump the solid phase from the upper part 3 to the mixing chamber 4, and the mixing of the mixing chamber to the orifice input 13 of the projection lance 14.
- the rotary kneading arm 18 is connected by a second end 22, opposite to the first end 20, to a motor 23 arranged to rotate the rotary arm at a rotational speed along an axis of rotation r passing through the ends 20 and 22 of the arm.
- the arm once rotated, kneads the solid phase with the liquid phase to form the mixture.
- the lance 14 of the projection device is associated with a rheological variable sensor 24 chosen from the following rheological variables of the mixture: pressure, viscosity, density, and stress.
- the sensor is a strain gauge measuring the pressure of the mixture at the mixing outlet.
- the device further comprises a control means 25, preferably a proportional-integral-derivative type calculator, connected by a first transmission line 11 to the sensor 24 and by a second transmission line 12 to a speed regulator 26 of the engine 23, this regulator is arranged to act on the speed of rotation of the mixing arm 18 on the basis of a value of the rheological variable measured by the sensor 24.
- a control means 25 preferably a proportional-integral-derivative type calculator, connected by a first transmission line 11 to the sensor 24 and by a second transmission line 12 to a speed regulator 26 of the engine 23, this regulator is arranged to act on the speed of rotation of the mixing arm 18 on the basis of a value of the rheological variable measured by the sensor 24.
- the control means is arranged to receive a first signal S1 emitted by the sensor 24 and send a second signal S2 to the speed regulator arranged to act on the speed of the motor via an actuator A which may be for example an inverter when said regulator 26 is a frequency converter and when the motor is an AC motor.
- the liquid phase is brought to a first fixed flow D1 from the upper part 3 to the mixing chamber 4 of the rotary kneader 2.
- the solid phase is brought to a second flow D2, which can be fixed or variable, from the upper part 3 to the mixing chamber 4.
- the solid phase is conveyed at a flow rate D3 from a first container 9 to the upper part 3 of the kneader, while the liquid phase is conveyed at a flow rate D4 from a second container 9 'to the upper part 3 of the kneader.
- the mixture is then formed by rotary kneading in the mixing chamber 4 of the liquid phase and the solid phase by the kneading arm 18 passing through this chamber and rotated at a speed of rotation by the motor 23.
- this mixture has a liquid phase: solid phase ratio between 0.3 and 1, preferably between 0.4 and 0.8, advantageously between 0.5 and 0.7.
- the mixture is then driven, by the rotational movement of the eccentric screw of the rotary arm in the compression stage 1 1, from the mixing chamber 4 to the inlet port of the projection lance 14, and passes through the Compression rack of the Moineau 11 pump that pumps the mixture to a D5 pumping rate.
- the mixture driven to the pumping rate D5, passes through the lance 14 to reach the projection nozzle 16 and be projected on the wall.
- the pumping rate D5 must be determined as a function of the length L of the lance measured between the inlet orifice 13 and the outlet orifice 15.
- stationary mode operation that is to say at a speed in which the rotational speed of the rotary arm is constant and in which the feed rates of the liquid phase D1 and the liquid phase D2 to the chamber of mixing, its delivery rates of the liquid phase D3 and the solid phase D4 to the upper part of the mixer to the upper part of the mixer, and the pumping rate D5 of the mixture to the lance do not vary as a function of time.
- the mixing chamber is mixed until a first level 27 separating the mixing chamber to the upper part 3 of the mixer.
- This plurality of layers is successively composed, from the low level of the mixer 28 passing through the mixing outlet 10, to the high level of the mixer 29: a first mixing layer located between the levels 27 and 28, a second layer the liquid phase between levels 27 and 30, and a third layer of the solid phase between levels 29 and 30.
- the rotating rotor in the stator can induce a localized temperature increase in the compression stage which causes a dilation of the rubber sheath and results in a deformation of the cells which induces a reduction in their volume which has the effect that the solid phase flow to the mixing chamber is decreased.
- the mixture produced and pumped sees its solid phase load decreased and its reduced viscosity: it is more liquid and it does not stick to the wall.
- the variation of the amount of water in the kneader can also alter the consistency of the mixture to be sprayed.
- This rheological variable value corresponds to the measurement of a parameter of the consistency of the mixture and may be, for example, the pressure of the mixture measured when the latter passes through the lance 14.
- the sensor further generates the first signal S1 transmitted to the control means 25 by the transmission line 11 which receives this first signal and generates the second signal. $ 2 sent to the speed controller 26 by the second transmission line 12.
- the speed controller then processes the second signal and controls said motor rotating said mixing arm to regulate said rotational speed of said mixing arm and thus regulate the second feed rate of said solid phase D2 and the pumping rate of the mixture D5.
- the first signal S1 is compared with a first reference signal corresponding to a second reference rheological variable value with the aid of a first comparison calculator of the control means.
- the second rheological variable value corresponds to a desired pressure value of mixture associated with a consistency of the mixture that is desired to reach the output of the projection lance.
- the first computer processes the first signal and the first reference signal as input to output the second signal S2 and send it to the speed controller.
- This second signal S2 corresponds to a difference ⁇ calculated between, on the one hand, the first rheological variable value and, on the other hand, the second reference rheological variable value.
- the difference ⁇ corresponds to an absolute difference value between the first value (value measured by the sensor) and the second value (reference value).
- the second signal corresponding to an absolute deviation value ⁇ , is then processed at the input of the speed regulator which decodes the second signal, compares with a second calculator the value of absolute deviation ⁇ at a second value absolute difference threshold. If the first absolute difference value differs from the threshold value which may be a null or non-nuile value, the regulator translates the second signal that it has received into a variation of the rotation speed of the rotary arm via the actuator A for inducing a variation at a first amplitude simultaneously of the second feed rate of said solid phase D2 and the pumping rate of the mixture D5.
- the threshold value is defined as zero, it means that it is desired that the rheological variable value measured at the level of the lance 14 is strictly equal to the second value of the reference rheological variable. On the other hand, if the threshold value is set as a non-zero value, the measured rheological variable value is allowed to deviate from that of a second amplitude corresponding to said threshold value.
- the variation of the second feed rate of said solid phase D2 and of the pumping rate of the mixture D5 is carried out until the first rheological variable value reaches the value of reference or a value within a range of values determined by a non-zero threshold value.
- the senor 24 is a strain gauge provided with a contact piece passing through the lance to be in contact with the mixture and which is arranged to undergo a deformation induced by the pressure. of the mixture.
- the strain gauge reflects this deformation undergone by the contact piece in variation of electrical resistance. This variation of electrical resistance is associated with a variation in intensity of an electric current corresponding to the signal S1 generated by the sensor and sent to the control means.
- control means is a proportional-integral-derivative type corrector.
- the first amplitude of the variation of the feed rates of the solid phase D2 and of the pumping of the mixture D5 is determined proportionally to the value of absolute difference ⁇ and to the integration of the deviation value.
- absolute in time that is to say in practice to the sum of absolute deviation values A ⁇ measured over a given period of time.
- control means 25 is connected to a remote control module T, with or without a wire, arranged to transmit to the control module the second value of reference rheological variable, c ' that is to say at the desired pressure value of the mixture associated with a consistency of the mixture that it is desired to reach at the outlet of the projection lance.
- This value is encoded via an encoding interface of the remote control module which outputs a third signal S3 and sends it to the control module which converts this third signal into said second rheological variable value.
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- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
Abstract
Spraying machine (1) comprising a stirring arm positioned in a stirring chamber and extended by an eccentric screw (21) that ends in a compression stage (11) of a pump, the pump being designed to simultaneously pump a mixture towards a mixture outlet (12) and to pump a solid phase towards said stirring chamber (4), a control means (25) connected to a mixture rheology sensor associated with a spray lance, and a speed regulator designed to act on said rotation speed of the stirring arm.
Description
DISPOSITIF DE PROJECTION D'UN MELANGE ET DEVICE FOR PROJECTING A MIXTURE AND
PROCEDE DE PREPARATION D'UN MELANGE PROCESS FOR PREPARING A MIXTURE
La présente invention se rapporte à un dispositif de projection d'un mélange comprenant une pompe équipée d'un étage de compression et d'un rotor, d'une lance de projection et d'un malaxeur muni d'au moins une alimentation de phase liquide et d'au moins une alimentation de phase solide, ledit malaxeur présentant une chambre de malaxage, ladite chambre de malaxage comprenant une sortie reliée à une entrée dudit étage de compression de la pompe, ledit étage de compression comprenant une sortie dudit mélange reliée à un premier orifice d'entrée de la lance de projection agencée pour projeter ledit mélange par un deuxième orifice de projection dans un environnement extérieur, ledit malaxeur comprenant au moins un bras de malaxage rotatif traversant ladite chambre de malaxage, agencé pour être mis en mouvement à une vitesse de rotation par un moteur et pour malaxer ladite phase solide avec ladite phase liquide pour former un mélange de malaxage, ledit bras de malaxage comprenant une vis excentrique en proiongement, s'étendant au travers de ladite sortie de la chambre de malaxage et se terminant dans ledit étage de compression de ladite pompe, formant ainsi le rotor de la pompe, ladite pompe étant en outre agencée pour pomper simultanément ledit mélange vers ladite sortie de mélange dudit malaxeur et pour pomper ladite phase solide vers ladite chambre de malaxage. The present invention relates to a device for projecting a mixture comprising a pump equipped with a compression stage and a rotor, a projection lance and a mixer provided with at least one phase feed. liquid and at least one solid phase feed, said mixer having a mixing chamber, said mixing chamber comprising an output connected to an inlet of said pump compression stage, said compression stage comprising an output of said mixture connected to a first inlet of the projection lance arranged to project said mixture through a second projection orifice in an external environment, said mixer comprising at least one rotary kneading arm passing through said mixing chamber, arranged to be set in motion at a rotational speed by a motor and for kneading said solid phase with said liquid phase to form a kneading mixture, said kneading arm e comprising an eccentric screw in proiongement, extending through said outlet of the mixing chamber and ending in said compression stage of said pump, thus forming the pump rotor, said pump being further arranged to pump simultaneously said mixture to said mixing outlet of said mixer and for pumping said solid phase to said mixing chamber.
Ce dispositif, connu du document DE2218418, comprend une arrivée dudit mélange assurée par une pompe Moineau, le mélange étant pompé vers une lance de projection reliée par une de ses extrémités à la pompe, pour être ensuite projeté par une buse placée dans le prolongement d'une seconde extrémité de la lance. This device, known from document DE2218418, comprises an arrival of said mixture provided by a Sparrow pump, the mixture being pumped to a projection lance connected by one of its ends to the pump, to be then projected by a nozzle placed in the extension of a second end of the spear.
Ce dispositif est utilisé pour appliquer une couche d'un mélange projeté à partir d'une phase liquide et d'une phase solide. This device is used to apply a layer of a projected mixture from a liquid phase and a solid phase.
Cependant, un te! mélangeur souffre de plusieurs écueils. However, a te! blender suffers from several pitfalls.
D'une part, en fonctionnement, il arrive très souvent, par exemple lorsque
ce mélangeur est utilisé sur un chantier de construction, typiquement dans le cadre l'application d'un revêtement de site de construction avec du ciment humide ou du béton gâché destiné à être projeté sur un site, de préférence une surface, par exemple sur une surface de gunitage, que le débit d'arrivée phase liquide, par exemple de l'eau, dans le mélangeur et donc dans la chambre de malaxage varie au cours du temps. Cette variation peut être due au fait que l'alimentation en eau vers le malaxeur est branchée sur une prise d'eau commune à partir de laquelle une autre alimentation en eau est branchée. On the one hand, in operation, it happens very often, for example when this mixer is used on a construction site, typically in the context of the application of a construction site coating with wet cement or tempered concrete intended to be sprayed on a site, preferably a surface, for example on a gunning surface, that the liquid phase inlet flow, for example water, in the mixer and therefore in the mixing chamber varies over time. This variation may be due to the fact that the water supply to the mixer is connected to a common water intake from which another water supply is connected.
Cette variation du débit d'eau affecte la qualité du mélange à projeter. A titre d'exemple, si le débit en eau augmente, le mélange formé est trop liquide et ne colle pas, et, une fois projeté, ne tient pas uniformément sur le support, a contrario, si le débit en eau diminue, le mélange formé est trop épais et sa projection est donc de moindre qualité puisque la projection d'un mélange trop épais compromet l'uniformité de la couche de mélange sur ie mur. This variation in water flow affects the quality of the mixture to be sprayed. For example, if the water flow increases, the mixture formed is too liquid and does not stick, and when projected, does not hold uniformly on the support, conversely, if the water flow decreases, the mixture formed is too thick and its projection is of lower quality since the projection of a too thick mixture compromises the uniformity of the mixing layer on the wall.
D'autre part, le débit en eau peut être faible au point d'obtenir un mélange dans la chambre de malaxage qui présente une viscosité élevée de sorte que le mouvement de rotation du bras rotatif se bloque au niveau de la chambre de compression ce qui peut amener à une rupture de ce dernier qui est toujours entraîné dans un mouvement de rotation. Ce risque est d'autant plus élevé que le mélange est caractérisé par un temps de prise rapide. On the other hand, the water flow rate may be low enough to obtain a mixture in the mixing chamber which has a high viscosity so that the rotational movement of the rotary arm is blocked at the compression chamber which can lead to a breakage of the latter which is always driven in a rotational movement. This risk is even higher than the mixture is characterized by a fast setting time.
Généralement, pour pailler ce problème, les dispositifs de projection connus de l'état de la technique sont munis d'un système d'arrêt d'urgence de la rotation du bras rotatif, ce système comprend un capteur de débit d'eau relié à un moyen de contrôle qui commande l'arrêt de la rotation du bras et donc de la projection lorsque ie débit en eau passe sous une valeur seuil prédéfinie. In general, to overcome this problem, the projection devices known in the state of the art are provided with an emergency stop system for the rotation of the rotating arm, this system comprises a water flow sensor connected to a control means which controls the stopping of the rotation of the arm and therefore of the projection when the water flow passes under a predefined threshold value.
Si ce système d'arrêt permet de bloquer la projection à temps pour éviter une augmentation dramatique de la viscosité du
mélange à projeter, il ne constitue pas une alternative satisfaisante dans la mesure où il implique un arrêt de la projection qui compromet de facto l'assurance d'avoir une couche uniforme de mélange. If this stop system blocks the projection in time to avoid a dramatic increase in the viscosity of the It is not a satisfactory alternative in that it involves a projection stop, which compromises de facto the assurance of having an even layer of mixture.
L'invention a pour but de pallier les inconvénients de l'état de la technique en procurant un dispositif de projection permettant de garantir une consistance homogène et constante du mélange en sortie de malaxeur et à débit constant ou du moins quasi-constant durant le procédé de projection de sorte que la projection du mélange soit la plus uniforme possible. The aim of the invention is to overcome the drawbacks of the state of the art by providing a projection device which makes it possible to guarantee a homogeneous and constant consistency of the mixture at the mixer outlet and at a constant or at least quasi-constant flow rate during the process. projection so that the projection of the mixture is as uniform as possible.
Pour pallier ces inconvénients, il est prévu suivant l'invention, un dispositif tel qu'indiqué au début caractérisé en ce qu'il comprend un moyen de contrôle relié à un capteur de variable rhéologique dudit mélange et à un régulateur de vitesse dudit moteur, ledit capteur étant associé à ladite lance de projection dudit mélange et ledit régulateur de vitesse étant agencé pour agir sur ladite vitesse de rotation du bras de malaxage, ledit moyen de contrôle étant agencé pour recevoir un signal émis par le capteur de variable et envoyer un signal vers ledit régulateur sur base d'une valeur mesurée par le capteur. In order to overcome these drawbacks, provision is made according to the invention for a device as indicated at the beginning, characterized in that it comprises a control means connected to a rheological variable sensor of said mixture and to a speed regulator of said engine, said sensor being associated with said projection lance of said mixture and said speed regulator being arranged to act on said speed of rotation of the mixing arm, said control means being arranged to receive a signal transmitted by the variable sensor and to send a signal to said controller based on a value measured by the sensor.
De cette façon, la consistance du mélange est déterminée à tout moment durant la projection par la mesure d'une valeur de variable rhéologique qui est transmise au moyen de contrôle sous la forme d'un signal. Si cette valeur de variable rhéologique mesurée diffère d'une valeur seuil prédéterminée correspondant à une consistance de mélange souhaitée, le moyen de contrôle envoie à son tour un signal vers le régulateur qui modifie la vitesse de rotation du bras jusqu'à ce que le mélange en sortie de malaxage ait la consistance souhaitée. In this way, the consistency of the mixture is determined at any time during the projection by measuring a rheological variable value which is transmitted to the control means in the form of a signal. If this measured rheological variable value differs from a predetermined threshold value corresponding to a desired mixing consistency, the control means in turn sends a signal to the regulator which changes the rotational speed of the arm until the mixture at the end of mixing has the desired consistency.
Ainsi, contrairement au dispositif de l'état de la technique, le dispositif de projection selon l'invention permet une correction de la consistance du mélange effectuée lors de la formation du mélange par malaxage, ce qui permet d'une part d'avoir un dispositif plus réactif aux variations des débits d'arrivée en phase liquide ou en phase solide et dont
la régulation est plus simple car il n'implique l'utilisation que d'un seul capteur au niveau de !a lance de projection. Thus, unlike the device of the state of the art, the projection device according to the invention allows a correction of the consistency of the mixture made during the formation of the mixture by mixing, which allows on the one hand to have a device more responsive to variations in flow rates in the liquid phase or in the solid phase, and the regulation is simpler because it involves the use of only one sensor at the level of the projection lance.
La présente invention repose sur l'effet surprenant que ia modification de la vitesse de rotation du bras malaxeur permet de maintenir une consistance homogène et constante au cours du temps tout en n'affectant pas, ou du moins en n'affectant que très peu, le débit de sortie du mélange de telle sorte que la projection du mélange soit la plus uniforme possible. The present invention is based on the surprising effect that the modification of the speed of rotation of the kneading arm makes it possible to maintain a homogeneous and constant consistency over time while not affecting, or at least affecting, only very little, the output flow of the mixture so that the projection of the mixture is as uniform as possible.
Avantageusement, ledit moyen de contrôle est un correcteur de type proportionnel-intégral-dérivé. Advantageously, said control means is a proportional-integral-derivative type corrector.
Ce type de régulateur présente l'avantage d'être facile à mettre en oeuvre physiquement et peut donc être appliqué pour réguler un dispositif déjà en production. Il permet en outre une adaptation de ia régulation à l'évolution de paramètres tels que l'usure des pièces du dispositif, comme le rotor et le stator, ou encore l'augmentation de la température dans l'étage de compression. This type of regulator has the advantage of being easy to implement physically and can therefore be applied to regulate a device already in production. It also makes it possible to adapt the regulation to the evolution of parameters such as the wear of the parts of the device, such as the rotor and the stator, or the increase of the temperature in the compression stage.
De plus, dans une forme de réalisation particulière, ledit régulateur est un variateur de fréquence et le moteur est un moteur à courant alternatif. In addition, in a particular embodiment, said regulator is a frequency converter and the motor is an AC motor.
Dans une forme de réalisation particulière, le capteur est un capteur de pression, de préférence, une jauge de déformation. In a particular embodiment, the sensor is a pressure sensor, preferably a strain gauge.
De préférence, ladite phase liquide comprend de l'eau. Preferably, said liquid phase comprises water.
Avantageusement, ladite phase solide est une matière minérale pulvérulente, en particulier hydraulique, de préférence comprenant au moins un élément choisi dans le groupe du gypse, du sable, du ciment sec. Advantageously, said solid phase is a pulverulent inorganic material, in particular hydraulic material, preferably comprising at least one element chosen from the group consisting of gypsum, sand and dry cement.
Dans une forme de réalisation particulièrement avantageuse du dispositif selon l'invention, ladite alimentation de phase liquide est située à un niveau inférieur à celui de ladite alimentation de phase solide. In a particularly advantageous embodiment of the device according to the invention, said liquid phase supply is located at a level lower than that of said solid phase supply.
De cette façon, l'étage de compression et une partie inférieure de ia chambre de malaxage sont constamment saturés en eau
de sorte que, !ors du malaxage et du pompage du mélange, il n'y ait pas formation de grumeaux ou de bulle d'air dans le mélange. In this way, the compression stage and a lower part of the mixing chamber are constantly saturated with water so that, when kneading and pumping the mixture, there is no lumping or air bubble in the mixture.
D'autres formes de réalisation du dispositif suivant l'invention sont indiquées dans les revendications annexées. Other embodiments of the device according to the invention are indicated in the appended claims.
L'invention a aussi pour objet un procédé comprenant de préparation d'un mélange d'une phase solide ou d'une phase pâteuse avec une phase liquide, comprenant : The invention also relates to a process comprising the preparation of a mixture of a solid phase or of a pasty phase with a liquid phase, comprising:
- une amenée d'une phase liquide à un premier débit dans une chambre de malaxage d'un malaxeur rotatif, a supply of a liquid phase at a first flow rate in a mixing chamber of a rotary kneader,
- une amenée d'une phase solide à un deuxième débit dans ladite chambre de malaxage dudit malaxeur rotatif, a supply of a solid phase at a second flow rate into said mixing chamber of said rotary kneader,
- un malaxage rotatif dans ladite chambre de malaxage de ladite phase solide avec ladite phase liquide pour former un mélange de malaxage par un bras de malaxage traversant ladite chambre de malaxage et agencé pour être mis en mouvement à une vitesse de rotation par un moteur, a rotary kneading in said kneading chamber of said solid phase with said liquid phase to form a kneading mixture by a kneading arm passing through said kneading chamber and arranged to be set in motion at a speed of rotation by a motor,
- un pompage dudit mélange à un troisième débit de pompage vers une sortie de mélange dudit malaxeur reliée à un premier orifice d'entrée d'une lance de projection, a pumping of said mixture at a third pumping rate to a mixing outlet of said mixer connected to a first inlet orifice of a projection lance,
- une projection dudit mélange par un deuxième orifice de projection de ladite lance de projection traversée par ledit mélange provenant de ladite sortie de mélange, a projection of said mixture by a second projection orifice of said projection lance traversed by said mixture originating from said mixing outlet,
- une mesure d'au moins une variable rhéologtque dudit mélange, de préférence la pression, donnant une première valeur de variable rhéologique qui est codée en un premier signal, a measure of at least one rheological variable of said mixture, preferably the pressure, giving a first rheological variable value which is coded in a first signal,
- une réception dudit premier signal par un moyen de contrôle générant un deuxième signal de sortie vers un régulateur de vitesse dudit moteur rotatif. - A reception of said first signal by a control means generating a second output signal to a speed controller of said rotary motor.
Ledit bras de malaxage traversant ladite chambre de malaxage comprend dans son prolongement une vis excentrique s'étendant au travers d'une sortie de la chambre de malaxage reliée à une
entrée d'un étage de compression d'une pompe, laquelle vis excentrique s'étend au travers de ia sortie et se termine dans un étage de compression d'une pompe où a lieu ladite étape de pompage dudit mélange, laquelle vis excentrique formant ainsi un rotor de la pompe, ledit bras de malaxage commandant ledit deuxième débit d'amenée de ladite phase solide vers ladite chambre de malaxage et ledit troisième débit de pompage dudit mélange Said mixing arm passing through said mixing chamber comprises in its extension an eccentric screw extending through an outlet of the mixing chamber connected to a mixing chamber. input of a compression stage of a pump, which eccentric screw extends through the outlet and terminates in a compression stage of a pump where said step of pumping said mixture takes place, which eccentric screw thus forming a rotor of the pump, said mixing arm controlling said second feed rate of said solid phase to said mixing chamber and said third rate of pumping said mixture
Le procédé est caractérisé en ce que l'étape de mesure de ladite variable rhéologique est réalisée au niveau de ladite lance de projection, ledit régulateur de vitesse traitant ledit deuxième signal de sortie pour ensuite commander ledit moteur mettant en rotation ledit bras de malaxage et réguler ladite vitesse de rotation dudit bras de malaxage et induire une variation simultanément dudit deuxième débit d'amenée de ladite phase solide et dudit troisième débit de pompage dudit mélange. The method is characterized in that the step of measuring said rheological variable is performed at said projection lance, said speed regulator processing said second output signal to then control said motor rotating said mixing arm and regulate said rotational speed of said mixing arm and inducing a variation simultaneously of said second feed rate of said solid phase and said third flow rate of said mixture.
En particulier, ce procédé comprend en outre une première étape de comparaison dans laquelle ledit premier signal est comparé à un premier signal de référence correspondant à une deuxième valeur de variable rhéologique de référence à l'aide d'un premier calculateur de comparaison dudit moyen de contrôle traitant en entrée ledit premier signal et ledit premier signal de référence pour produire en sortie ledit deuxième signai et l'envoyer vers ledit régulateur de vitesse. In particular, this method further comprises a first comparison step in which said first signal is compared with a first reference signal corresponding to a second reference rheological variable value with the aid of a first comparison calculator of said first reference signal. control inputting said first signal and said first reference signal to output said second signal and send it to said speed controller.
De préférence, ledit deuxième signal correspond à une différence calculée entre, d'une part, ladite première valeur de variable rhéologique et, d'autre part, ladite deuxième valeur de variable rhéologique de référence, ledit deuxième signa! étant traité en entrée dudit régulateur de vitesse qui décode ledit deuxième signal et le traduit en sortie en une variation simultanément dudit deuxième débit d'amenée de ladite phase solide et dudit troisième débit de pompage dudit mélange. Preferably, said second signal corresponds to a difference calculated between, on the one hand, said first rheological variable value and, on the other hand, said second reference rheological variable value, said second signa! being processed at the input of said speed regulator which decodes said second signal and translates it into an output simultaneously of said second feed rate of said solid phase and said third flow rate of said mixture.
Avantageusement, l'étape de traitement dudit deuxième signal par ledit régulateur de vitesse est une étape de régulation de type proportionnel-intégral-dérivé.
Eventuellement, ladite variation dudit deuxième débit d'amenée de ladite phase solide et dudit troisième débit de pompage dudit mélange est réalisée jusqu'à ce que ladite au moins une variable rhéologique atteigne une valeur préalablement déterminée. Advantageously, the step of processing said second signal by said speed controller is a proportional-integral-derivative type regulation step. Optionally, said variation of said second feed rate of said solid phase and said third pumping rate of said mixture is carried out until said at least one rheological variable reaches a predetermined value.
En particulier, ladite au moins une variable rhéologique dudit mélange est la pression. In particular, said at least one rheological variable of said mixture is the pressure.
D'autres formes de réalisation du procédé suivant l'invention sont indiquées dans les revendications annexées. Other embodiments of the process according to the invention are indicated in the appended claims.
D'autres caractéristiques, détails et avantages de l'invention rassortiront de la description donnée ci-après, à titre non limitatif et en faisant référence aux dessins annexés. Other features, details and advantages of the invention will be described in the description given below, without limitation and with reference to the accompanying drawings.
La figure 1 représente de façon schématique le dispositif de projection selon la présente invention. Figure 1 schematically shows the projection device according to the present invention.
Ce dispositif est particulièrement destiné à former un mélange, par exemple du plâtre, à partir d'une phase liquide, par exemple de l'eau, et d'une phase solide, par exemple du gypse, et à projeter ce mélange de façon à former une couche uniforme de ce mélange par exemple sur un mur. This device is particularly intended to form a mixture, for example plaster, from a liquid phase, for example water, and a solid phase, for example gypsum, and to project this mixture so as to form an even layer of this mixture for example on a wall.
De préférence, la phase liquide est de l'eau et la phase solide est une matière minérale pulvérulente, en particulier hydraulique, de préférence comprenant au moins un élément choisi dans le groupe du gypse, du sable, du ciment sec. Preferably, the liquid phase is water and the solid phase is a pulverulent mineral material, in particular hydraulic, preferably comprising at least one element selected from the group of gypsum, sand, dry cement.
Dans un mode de réalisation préférentiel du dispositif selon l'invention, ie malaxeur peut être alimenté par une phase pâteuse à !a place d'une phase solide, la phase pâteuse est une matière minérale humide comprenant au moins un élément choisi dans le groupe du ciment humide, de la chaux éteinte, et du mortier. In a preferred embodiment of the device according to the invention, the kneader may be fed with a pasty phase instead of a solid phase, the pasty phase is a moist mineral material comprising at least one element selected from the group of wet cement, slaked lime, and mortar.
De préférence, ledit mélange présente un rapport phase liquide : phase solide compris entre 0,3 et 1 , de préférence entre 0,4 et 0,8, avantageusement entre 0,5 et 0,7.
Comme on peut le voir à la figure 1 , le dispositif de projection 1 d'un mélange comprend un malaxeur 2 divisé en une partie inférieure correspondant à une chambre de malaxage 4 et une partie supérieure 3 située au-dessus de la chambre de malaxage 4 et traversée par un orifice d'entrée d'une phase solide 5, relié à une première alimentation en phase solide 6, et un orifice d'entrée d'une phase liquide 7 relié à une deuxième alimentation en phase liquide 8, l'orifice d'entrée de la phase liquide 7 étant placé à un niveau inférieur à celui de l'orifice d'entrée de la phase solide 5. Chacune des alimentations 6, 8 peut éventuellement être reliée à un conteneur 9 qui peut être une trémie 9 ou une citerne 9'. Preferably, said mixture has a liquid phase: solid phase ratio of between 0.3 and 1, preferably between 0.4 and 0.8, advantageously between 0.5 and 0.7. As can be seen in FIG. 1, the projection device 1 of a mixture comprises a kneader 2 divided into a lower part corresponding to a kneading chamber 4 and an upper part 3 situated above the kneading chamber 4 and traversed by an inlet for a solid phase 5, connected to a first solid phase feed 6, and an inlet for a liquid phase 7 connected to a second liquid phase feed 8, the orifice the inlet of the liquid phase 7 being placed at a level lower than that of the inlet of the solid phase 5. Each of the feeds 6, 8 may optionally be connected to a container 9 which may be a hopper 9 or a tank 9 '.
Ladite chambre de malaxage 4 est traversée par un premier orifice de sortie de malaxage 10 relié à un étage de compression d'une pompe 11 muni d'un deuxième orifice de sortie de mélange 12 relié à un orifice d'entrée 13 d'une lance 14 de projection. Cette lance est agencée pour projeter le mélange à partir d'un deuxième orifice de sortie 15 relié à une buse de projection 16 sur un mur 17. Said mixing chamber 4 is traversed by a first mixing outlet orifice 10 connected to a compression stage of a pump 11 provided with a second mixing outlet orifice 12 connected to an inlet port 13 of a lance 14 of projection. This lance is arranged to project the mixture from a second outlet orifice 15 connected to a projection nozzle 16 on a wall 17.
Le malaxeur 2 est muni d'un bras de malaxage rotatif 18 agencé pour traverser la partie supérieure 3 et la chambre de malaxage 4, ledit bras de malaxage étant éventuellement muni d'une ou plusieurs pales 19 et prolongé au niveau d'une première extrémité 20, orienté vers l'orifice de sortie de malaxage 10, par une vis excentrique en forme de « queue de cochon » 21 qui s'étend au travers de l'orifice de sortie de malaxage 10 pour terminer dans l'étage de compression 1 1 de la pompe et former une pompe de type Moineau comprenant un rotor qui est la vis excentrique et un stator qui est l'étage de compression. The kneader 2 is provided with a rotary kneading arm 18 arranged to pass through the upper part 3 and the kneading chamber 4, said kneading arm possibly being provided with one or more blades 19 and extended at a first end. 20, facing the mixing outlet port 10, by an eccentric "pigtail" screw 21 which extends through the mixing outlet port 10 to terminate in the compression stage 1 1 of the pump and form a Sparrow type pump comprising a rotor which is the eccentric screw and a stator which is the compression stage.
Lorsque le rotor 21 est inséré dans le stator, une double chaîne de cavités étanches (encore appelées « alvéoles ») au volume défini par les dimensions et les formes du rotor et du stator est constituée. Lorsque le rotor tourne à l'intérieur du stator, les alvéoles progressent le long de l'axe de rotation de la vis excentrique de la pompe, ce qui transfère
le mélange pompé depuis la sortie de la chambre de malaxage de la pompe vers la sortie du mélange. When the rotor 21 is inserted into the stator, a double chain of sealed cavities (also called "cells") to the volume defined by the dimensions and shapes of the rotor and the stator is formed. When the rotor rotates inside the stator, the cells progress along the axis of rotation of the eccentric screw of the pump, which transfers the mixture pumped from the outlet of the mixing chamber of the pump to the outlet of the mixture.
Le stator peut comprendre une paroi interne revêtue d'un matériau de type caoutchouté, cette pompe étant agencée pour pomper simultanément la phase solide depuis la partie supérieure 3 vers la chambre de malaxage 4, et le mélange de la chambre de malaxage vers l'orifice d'entrée 13 de la lance de projection 14. The stator may comprise an inner wall coated with a rubberized material, this pump being arranged to simultaneously pump the solid phase from the upper part 3 to the mixing chamber 4, and the mixing of the mixing chamber to the orifice input 13 of the projection lance 14.
Le bras de malaxage rotatif 18 est relié par une deuxième extrémité 22, opposée à la première extrémité 20, à un moteur 23 agencé pour mettre en mouvement de rotation le bras rotatif à une vitesse de rotation selon un axe de rotation r traversant les extrémités 20 et 22 du bras. The rotary kneading arm 18 is connected by a second end 22, opposite to the first end 20, to a motor 23 arranged to rotate the rotary arm at a rotational speed along an axis of rotation r passing through the ends 20 and 22 of the arm.
Le bras, une fois en mouvement de rotation, malaxe la phase solide avec !a phase liquide pour former le mélange. The arm, once rotated, kneads the solid phase with the liquid phase to form the mixture.
La lance 14 du dispositif de projection est associé à un capteur de variable rhéologique 24 choisie parmi les variables rhéologiques du mélange suivantes : la pression, la viscosité, la densité, et la contrainte. De préférence, le capteur est une jauge de déformation mesurant la pression du mélange en sortie de malaxage. The lance 14 of the projection device is associated with a rheological variable sensor 24 chosen from the following rheological variables of the mixture: pressure, viscosity, density, and stress. Preferably, the sensor is a strain gauge measuring the pressure of the mixture at the mixing outlet.
Le dispositif comprend en outre un moyen de contrôle 25, de préférence un calculateur de type proportionnel-intégral-dérivé, relié par une première ligne de transmission 11 au capteur 24 et par une deuxième ligne de transmission 12 à un régulateur de vitesse 26 du moteur 23, ce régulateur est agencé pour agir sur la vitesse de rotation du bras de malaxage 18 sur base d'une valeur de la variable rhéologique mesurée par le capteur 24. The device further comprises a control means 25, preferably a proportional-integral-derivative type calculator, connected by a first transmission line 11 to the sensor 24 and by a second transmission line 12 to a speed regulator 26 of the engine 23, this regulator is arranged to act on the speed of rotation of the mixing arm 18 on the basis of a value of the rheological variable measured by the sensor 24.
Le moyen de contrôle est agencé pour recevoir un premier signal S1 émis par le capteur 24 et envoyer un deuxième signal S2 vers le régulateur de vitesse agencé pour agir sur la vitesse du moteur par l'intermédiaire d'un actionneur A qui peut être par exemple un onduleur
lorsque ledit régulateur 26 est un variateur de fréquence et lorsque le moteur est un moteur à courant alternatif. The control means is arranged to receive a first signal S1 emitted by the sensor 24 and send a second signal S2 to the speed regulator arranged to act on the speed of the motor via an actuator A which may be for example an inverter when said regulator 26 is a frequency converter and when the motor is an AC motor.
En fonctionnement et en faisant référence à la figure 1 , la phase liquide est amenée à un premier débit fixe D1 depuis la partie supérieure 3 vers la chambre de malaxage 4 du malaxeur rotatif 2. La phase solide est amenée à un deuxième débit D2, qui peut être fixe ou variable, depuis la partie supérieure 3 vers la chambre de malaxage 4. In operation and with reference to FIG. 1, the liquid phase is brought to a first fixed flow D1 from the upper part 3 to the mixing chamber 4 of the rotary kneader 2. The solid phase is brought to a second flow D2, which can be fixed or variable, from the upper part 3 to the mixing chamber 4.
La phase solide est acheminée à un débit D3 depuis un premier conteneur 9 vers la partie supérieure 3 du malaxeur, tandis que la phase liquide est acheminée à un débit D4 depuis un deuxième conteneur 9' vers la partie supérieure 3 du malaxeur. The solid phase is conveyed at a flow rate D3 from a first container 9 to the upper part 3 of the kneader, while the liquid phase is conveyed at a flow rate D4 from a second container 9 'to the upper part 3 of the kneader.
Le mélange est ensuite formé par malaxage rotatif dans la chambre de malaxage 4 de la phase liquide et la phase solide par le bras de malaxage 18 traversant cette chambre et mis en mouvement de rotation à une vitesse de rotation par le moteur 23. The mixture is then formed by rotary kneading in the mixing chamber 4 of the liquid phase and the solid phase by the kneading arm 18 passing through this chamber and rotated at a speed of rotation by the motor 23.
idéalement, ce mélange présente un rapport phase liquide : phase solide comprise entre 0,3 et 1 , de préférence entre 0,4 et 0,8, avantageusement entre 0,5 et 0,7. ideally, this mixture has a liquid phase: solid phase ratio between 0.3 and 1, preferably between 0.4 and 0.8, advantageously between 0.5 and 0.7.
Le mélange est ensuite entraîné, par le mouvement de rotation de ia vis excentrique du bras rotatif dans l'étage de compression 1 1 , depuis la chambre de malaxage 4 vers l'orifice d'entrée de la lance de projection 14, et traverse l'étagè de compression de la pompe Moineau 11 qui pompe le mélange à un débit de pompage D5. The mixture is then driven, by the rotational movement of the eccentric screw of the rotary arm in the compression stage 1 1, from the mixing chamber 4 to the inlet port of the projection lance 14, and passes through the Compression rack of the Moineau 11 pump that pumps the mixture to a D5 pumping rate.
Le mélange, entraîné au débit de pompage D5, traverse la lance 14 pour aboutir à la buse de projection 16 et être projeté sur le mur. Le débit de pompage D5 doit être déterminé en fonction de la longueur L de la lance mesurée entre l'orifice d'entrée 13 et l'orifice de sortie 15. The mixture, driven to the pumping rate D5, passes through the lance 14 to reach the projection nozzle 16 and be projected on the wall. The pumping rate D5 must be determined as a function of the length L of the lance measured between the inlet orifice 13 and the outlet orifice 15.
En effet, plus la longueur L est grande, plus le débit de pompage D5 requis pour projeter le mélange de sorte à obtenir une couche uniforme doit être élevée et donc plus élevée doit être la vitesse de rotation du bras rotatif.
En fonctionnement à régime stationnaire, c'est-à-dire à un régime dans tequei la vitesse de rotation du bras rotatif est constante et dans lequel les débits d'amenée de la phase liquide D1 et de la phase liquide D2 vers la chambre de malaxage, Ses débits d'acheminement de la phase liquide D3 et de la phase solide D4 vers la partie supérieure du malaxeur vers la partie supérieure du malaxeur, et le débit de pompage D5 du mélange vers la lance ne varient pas en fonction du temps. Dans ce régime stationnaire, la chambre de malaxage est saturée en mélange jusqu'à un premier niveau 27 séparant la chambre de malaxage à la partie supérieure 3 du malaxeur. Indeed, the longer the length L is, the greater the pumping rate D5 required to project the mixture so as to obtain a uniform layer must be high and therefore higher must be the speed of rotation of the rotary arm. In stationary mode operation, that is to say at a speed in which the rotational speed of the rotary arm is constant and in which the feed rates of the liquid phase D1 and the liquid phase D2 to the chamber of mixing, its delivery rates of the liquid phase D3 and the solid phase D4 to the upper part of the mixer to the upper part of the mixer, and the pumping rate D5 of the mixture to the lance do not vary as a function of time. In this stationary regime, the mixing chamber is mixed until a first level 27 separating the mixing chamber to the upper part 3 of the mixer.
Dès lors que l'eau est amenée dans la partie supérieure 3 à un niveau inférieur à celui à partir duquel la phase solide est amenée, i! y a formation dans le malaxeur d'une pluralité de couches. Cette pluralité de couches est composée successivement, du niveau bas du malaxeur 28 passant par la sortie de malaxage 10, vers le niveau haut du malaxeur 29 : d'une première couche de mélange situé entre les niveaux 27 et 28, d'une deuxième couche de la phase liquide située entre les niveaux 27 et 30, et d'une troisième couche de la phase solide située entre les niveaux 29 et 30. As soon as the water is brought into the upper part 3 at a level lower than that from which the solid phase is fed, i! there is formation in the kneader of a plurality of layers. This plurality of layers is successively composed, from the low level of the mixer 28 passing through the mixing outlet 10, to the high level of the mixer 29: a first mixing layer located between the levels 27 and 28, a second layer the liquid phase between levels 27 and 30, and a third layer of the solid phase between levels 29 and 30.
En régime stationnaire, c'est la vitesse de rotation du bras rotatif de la pompe Moineau qui régit simultanément le débit D5 de pompage du mélange et le débit d'amenée de la phase solide D2 vers la chambre de malaxage. In stationary mode, it is the speed of rotation of the rotary arm of the Moineau pump which simultaneously governs the flow rate D5 of the mixture and the feed rate of the solid phase D2 to the mixing chamber.
En fonctionnement, il peut arriver que le débit d'acheminement en phase liquide D3 (ou en phase solide D4) dans le mélangeur, et donc que la quantité en phase liquide (ou la quantité en phase solide) contenue dans la chambre de malaxage, varient au cours du temps. In operation, it may happen that the delivery rate in liquid phase D3 (or solid phase D4) in the mixer, and therefore that the amount in the liquid phase (or the amount in solid phase) contained in the mixing chamber, vary over time.
Par exemple, lors du fonctionnement de !a pompe, le rotor en rotation dans le stator peur induire une augmentation de température localisée dans l'étage de compression ce qui entraîne une dilatation de la
gaine en caoutchouc et il en résulte une déformation des alvéoles qui induit une réduction de leur volume ce qui a pour effet que le débit en phase solide vers la chambre de malaxage est diminué. Le mélange produit et pompé voit sa charge en phase solide diminuée et sa viscosité réduite : il est plus liquide et il ne colle pas au mur. For example, during operation of the pump, the rotating rotor in the stator can induce a localized temperature increase in the compression stage which causes a dilation of the rubber sheath and results in a deformation of the cells which induces a reduction in their volume which has the effect that the solid phase flow to the mixing chamber is decreased. The mixture produced and pumped sees its solid phase load decreased and its reduced viscosity: it is more liquid and it does not stick to the wall.
En outre, comme discuté plus haut, en particulier, la variation de la quantité d'eau dans le malaxeur peut aussi altérer la consistance du mélange à projeter. In addition, as discussed above, in particular, the variation of the amount of water in the kneader can also alter the consistency of the mixture to be sprayed.
Pour pallier ces inconvénients, il est prévu selon l'invention un procédé de mélange de la phase liquide avec la phase solide pour former un mélange dans lequel le capteur 24 mesure, de préférence continuellement, la variable rhéologique au niveau de la lance de projection 14 donnant une première valeur de variable rhéologique. Cette valeur de variable rhéologique correspond à la mesure d'un paramètre de la consistance du mélange et peut être par exemple la pression du mélange mesurée lorsque ce dernier traverse la lance 14. To overcome these disadvantages, it is provided according to the invention a method of mixing the liquid phase with the solid phase to form a mixture in which the sensor 24 measures, preferably continuously, the rheological variable at the level of the projection lance 14 giving a first value of rheological variable. This rheological variable value corresponds to the measurement of a parameter of the consistency of the mixture and may be, for example, the pressure of the mixture measured when the latter passes through the lance 14.
La capteur génère en outre le premier signal S1 transmis vers le moyen de contrôle 25 par la ligne de transmission 11 qui réceptionne ce premier signal et génère le deuxième signa! $2 envoyé vers le régulateur de vitesse 26 par la deuxième ligne de transmission 12. Le régulateur de vitesse traite ensuite le deuxième signal et commande ledit moteur mettant en rotation ledit bras de malaxage pour réguler ladite vitesse de rotation dudit bras de malaxage et donc réguler le deuxième débit d'amenée de ladite phase solide D2 et le débit de pompage du mélange D5. The sensor further generates the first signal S1 transmitted to the control means 25 by the transmission line 11 which receives this first signal and generates the second signal. $ 2 sent to the speed controller 26 by the second transmission line 12. The speed controller then processes the second signal and controls said motor rotating said mixing arm to regulate said rotational speed of said mixing arm and thus regulate the second feed rate of said solid phase D2 and the pumping rate of the mixture D5.
Au niveau du moyen de contrôle 25, le premier signai S1 est comparé à un premier signal de référence correspondant à une deuxième valeur de variable rhéologique de référence à l'aide d'un premier calculateur de comparaison du moyen de contrôle. La deuxième valeur de variable rhéologique correspond à une valeur de pression souhaitée du
mélange associée à une consistance du mélange que l'on désire atteindre en sortie de la lance de projection. At the level of the control means 25, the first signal S1 is compared with a first reference signal corresponding to a second reference rheological variable value with the aid of a first comparison calculator of the control means. The second rheological variable value corresponds to a desired pressure value of mixture associated with a consistency of the mixture that is desired to reach the output of the projection lance.
Le premier calculateur traite en entrée le premier signal et le premier signal de référence pour produire en sortie le deuxième signal S2 et l'envoyer vers le régulateur de vitesse. The first computer processes the first signal and the first reference signal as input to output the second signal S2 and send it to the speed controller.
Ce deuxième signal S2 correspond à une différence Δ calculée entre, d'une part, la première valeur de variable rhéologique et, d'autre part, la deuxième valeur de variable rhéologique de référence. En particulier, la différence Δ correspond à une valeur d'écart absolu entre la première valeur (valeur mesurée par le capteur) et la deuxième valeur (valeur de référence). This second signal S2 corresponds to a difference Δ calculated between, on the one hand, the first rheological variable value and, on the other hand, the second reference rheological variable value. In particular, the difference Δ corresponds to an absolute difference value between the first value (value measured by the sensor) and the second value (reference value).
Le deuxième signal, correspondant à une valeur d'écart absolu Δ, est ensuite traité en entrée du régulateur de vitesse qui décode le deuxième signai, compare à l'aide d'un deuxième calculateur la valeur d'écart absolu Δ à une deuxième valeur d'écart absolu seuil. Si la première valeur d'écart absolu diffère de la valeur seuil qui peut être une valeur nulle ou non-nuile, le régulateur traduit le deuxième signai qu'il a reçu en une variation de la vitesse de rotation du bras rotatif par l'intermédiaire de l'actionneur A pour induire une variation à une première amplitude simultanément du deuxième débit d'amenée de ladite phase solide D2 et du débit de pompage du mélange D5. The second signal, corresponding to an absolute deviation value Δ, is then processed at the input of the speed regulator which decodes the second signal, compares with a second calculator the value of absolute deviation Δ at a second value absolute difference threshold. If the first absolute difference value differs from the threshold value which may be a null or non-nuile value, the regulator translates the second signal that it has received into a variation of the rotation speed of the rotary arm via the actuator A for inducing a variation at a first amplitude simultaneously of the second feed rate of said solid phase D2 and the pumping rate of the mixture D5.
Si la valeur seuil est définie comme étant nulle, cela signifie que l'on souhaite que la valeur de variable rhéologique mesurée au niveau de ia lance 14 soit strictement égale à la deuxième valeur de variable rhéologique de référence. A contrario, si la valeur seuil est fixée comme une valeur non-nulle, on tolère que la valeur de variable rhéologique mesurée dévie de celle de référence d'une deuxième amplitude correspondant à ladite valeur seuil. If the threshold value is defined as zero, it means that it is desired that the rheological variable value measured at the level of the lance 14 is strictly equal to the second value of the reference rheological variable. On the other hand, if the threshold value is set as a non-zero value, the measured rheological variable value is allowed to deviate from that of a second amplitude corresponding to said threshold value.
La variation du deuxième débit d'amenée de ladite phase solide D2 et du débit de pompage du mélange D5 est réalisée jusqu'à ce que la première valeur de variable rhéologique atteigne la valeur de
référence ou une valeur située dans une plage de valeurs déterminée par une valeur seuil non-nulle. The variation of the second feed rate of said solid phase D2 and of the pumping rate of the mixture D5 is carried out until the first rheological variable value reaches the value of reference or a value within a range of values determined by a non-zero threshold value.
Dans un mode particulier de réalisation du dispositif selon l'invention, le capteur 24 est une jauge de déformation munie d'une pièce de contact traversant la lance pour être en contact avec le mélange et qui est agencée pour subir une déformation induite par la pression du mélange. En fonctionnement, la jauge de déformation traduit cette déformation subie par la pièce de contact en variation de résistance électrique. Cette variation de résistance électrique est associée à une variation d'intensité d'un courant électrique correspondant au signal S1 généré par le capteur et envoyé vers le moyen de contrôle. In a particular embodiment of the device according to the invention, the sensor 24 is a strain gauge provided with a contact piece passing through the lance to be in contact with the mixture and which is arranged to undergo a deformation induced by the pressure. of the mixture. In operation, the strain gauge reflects this deformation undergone by the contact piece in variation of electrical resistance. This variation of electrical resistance is associated with a variation in intensity of an electric current corresponding to the signal S1 generated by the sensor and sent to the control means.
Dans un deuxième mode particulier de réalisation de l'invention, le moyen de contrôle est un correcteur de type proportionnel- intégral-dé rivé. Dans ce type de correcteur, la première amplitude de la variation des débits d'amenée de la phase solide D2 et de pompage du mélange D5 est déterminée proportionnellement à la valeur d'écart absolu Δ et à l'intégration de la valeur d'écart absolu dans le temps, c'est-à-dire en pratique à la somme de valeurs d'écart absolu A\ mesurées sur un laps de temps déterminé. In a second particular embodiment of the invention, the control means is a proportional-integral-derivative type corrector. In this type of corrector, the first amplitude of the variation of the feed rates of the solid phase D2 and of the pumping of the mixture D5 is determined proportionally to the value of absolute difference Δ and to the integration of the deviation value. absolute in time, that is to say in practice to the sum of absolute deviation values A \ measured over a given period of time.
Dans un mode particulier de réalisation de la présente invention, le moyen de contrôle 25 est connecté à un module de commande à distance T, avec ou sans fil, agencé pour transmettre au module de contrôle la deuxième valeur de variable rhéologique de référence, c'est-à-dire à la valeur de pression souhaitée du mélange associée à une consistance du mélange que l'on désire atteindre en sortie de la lance de projection. Cette valeur est encodée via une interface d'encodage du module de commande à distance qui transmet en sortie un troisième signal S3 et l'envoie vers le module de commande qui convertit ce troisième signai en ladite deuxième valeur de variable rhéologique. Il est bien entendu que la présente invention n'est en aucune façon limitée aux formes de réalisations décrites ci-dessus et que bien des modifications
peuvent y être apportées sans sortir du cadre des revendications annexées. In a particular embodiment of the present invention, the control means 25 is connected to a remote control module T, with or without a wire, arranged to transmit to the control module the second value of reference rheological variable, c ' that is to say at the desired pressure value of the mixture associated with a consistency of the mixture that it is desired to reach at the outlet of the projection lance. This value is encoded via an encoding interface of the remote control module which outputs a third signal S3 and sends it to the control module which converts this third signal into said second rheological variable value. It is understood that the present invention is in no way limited to the embodiments described above and that many changes can be made without departing from the scope of the appended claims.
Il est bien entendu que la présente invention n'est en aucune façon limitée aux formes de réalisations décrites ci-dessus et que bien des modifications peuvent y être apportées sans sortir du cadre des revendications annexées.
It is understood that the present invention is in no way limited to the embodiments described above and that many modifications can be made without departing from the scope of the appended claims.
Claims
1 . Dispositif de projection d'un mélange (1 ) comprenant un une pompe équipée d'un étage de compression (1 1 ) et d'un rotor (21 ), d'une !ance de projection (14) et d'un malaxeur (2) muni d'au moins une alimentation de phase liquide (8) et d'au moins une alimentation de phase solide (6), ledit malaxeur présentant une chambre de malaxage (4), ladite chambre de malaxage comprenant une sortie (10) reliée à une entrée dudit étage de compression (1 1 ) de la pompe, ledit étage de compression comprenant une sortie dudit mélange (12) reliée à un premier orifice d'entrée (13) de la lance de projection (14) agencée pour projeter ledit mélange par un deuxième orifice de projection (15) dans un environnement extérieur ( 7), ledit malaxeur comprenant au moins un bras de malaxage (18) rotatif traversant ladite chambre de malaxage, agencé pour être mis en mouvement à une vitesse de rotation par un moteur et pour malaxer ladite phase solide avec ladite phase liquide pour former un mélange de malaxage, ledit bras de malaxage comprenant une vis excentrique (21 ) en prolongement, s'étendant au travers de ladite sortie (10) de la chambre de malaxage (4) et se terminant dans ledit étage de compression (1 1 ) de ladite pompe, formant ainsi le rotor (21 ) de la pompe, ladite pompe étant agencée pour pomper simultanément ledit mélange vers ladite sortie de mélange (12) dudit malaxeur et pour pomper ladite phase solide vers ladite chambre de malaxage (4), lequel dispositif est caractérisé en ce qu'il comprend un moyen de contrôle (25) relié à un capteur de variable rhéologique dudit mélange (24) et à un régulateur de vitesse dudit moteur (26), ledit capteur étant associé à ladite lance de projection (14) dudit mélange et ledit régulateur de vitesse étant agencé pour agir sur ladite vitesse de rotation du bras de malaxage, ledit moyen de contrôle étant agencé pour recevoir un signal émis (S1) par le capteur de variable et envoyer un signal vers ledit régulateur (52) sur base d'une valeur mesurée par le capteur.
1. Apparatus for projecting a mixture (1) comprising a pump equipped with a compression stage (1 1) and a rotor (21), a throwing chamber (14) and a kneader ( 2) provided with at least one liquid phase feed (8) and at least one solid phase feed (6), said mixer having a mixing chamber (4), said mixing chamber comprising an outlet (10) connected to an input of said compression stage (1 1) of the pump, said compression stage comprising an output of said mixture (12) connected to a first inlet orifice (13) of the projection lance (14) arranged to project said mixture by a second spray orifice (15) in an external environment (7), said mixer comprising at least one rotating kneading arm (18) passing through said mixing chamber, arranged to be set in motion at a rotational speed by a motor and for kneading said solid phase with said liquid phase to form a mixing mixture, said mixing arm comprising an eccentric screw (21) extending, extending through said outlet (10) of the mixing chamber (4) and ending in said compression stage (1 1) of said pump, thereby forming the rotor (21) of the pump, said pump being arranged to simultaneously pump said mixture to said mixing outlet (12) of said mixer and to pump said solid phase to said mixing chamber (4), which device is characterized in that it comprises a control means (25) connected to a rheological variable sensor of said mixture (24) and to a speed regulator of said motor (26), said sensor being associated with said projection lance (14). ) of said mixture and said speed regulator being arranged to act on said speed of rotation of the mixing arm, said control means being arranged to receive an emitted signal (S1) by the variable sensor and send a signal to said regulator (52) based on a value measured by the sensor.
2. Dispositif selon la revendication 2, caractérisé en ce que ledit moyen de contrôle (25) est un correcteur de type proportionnel- intégral-dérivé. 2. Device according to claim 2, characterized in that said control means (25) is a proportional-integral-derivative type corrector.
3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit régulateur (26) est un variateur de fréquence et le moteur est un moteur à courant alternatif. 3. Device according to any one of the preceding claims, characterized in that said regulator (26) is a frequency converter and the motor is an AC motor.
4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit capteur (24) est un capteur de pression. 4. Device according to any one of the preceding claims, characterized in that said sensor (24) is a pressure sensor.
5. Dispositif selon la revendication 5, caractérisé en ce que le capteur de pression (24) est une jauge de déformation. 5. Device according to claim 5, characterized in that the pressure sensor (24) is a strain gauge.
6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite alimentation de phase liquide (8) est située à un niveau inférieur à celui de ladite alimentation de phase solide (6). 6. Device according to any one of the preceding claims, characterized in that said liquid phase supply (8) is located at a level lower than that of said solid phase supply (6).
7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite phase liquide comprend de l'eau. 7. Device according to any one of the preceding claims, characterized in that said liquid phase comprises water.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite phase solide est une matière minérale pulvérulente, en particulier hydraulique, de préférence comprenant au moins un élément choisi dans le groupe du gypse, du sable, du ciment sec. 8. Device according to any one of the preceding claims, characterized in that said solid phase is a pulverulent mineral material, in particular hydraulic, preferably comprising at least one element selected from the group of gypsum, sand, dry cement.
9. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ledit mélange présente un rapport phase liquide : phase solide compris entre 0,3 et 1 , de préférence entre 0,4 et 0,8, avantageusement entre 0,5 et 0,7. 9. Device according to any one of the preceding claims, wherein said mixture has a liquid phase: solid phase ratio between 0.3 and 1, preferably between 0.4 and 0.8, preferably between 0.5 and 0. 7.
10. Procédé de préparation d'un mélange d'une phase solide avec une phase liquide, comprenant : A process for preparing a mixture of a solid phase with a liquid phase, comprising:
a) une amenée d'une phase liquide à un premier débit (D1) dans une chambre de malaxage (4) d'un malaxeur rotatif (2),
b) une amenée d'une phase solide à un deuxième débit (D2) dans ladite chambre de malaxage (4) dudit malaxeur rotatif (2), a) feeding a liquid phase at a first rate (D1) into a mixing chamber (4) of a rotary kneader (2), b) feeding a solid phase to a second flow rate (D2) in said mixing chamber (4) of said rotary kneader (2),
c) un malaxage rotatif dans ladite chambre de malaxage (4) de ladite phase solide avec ladite phase liquide pour former un mélange de malaxage par un bras de malaxage (18) traversant ladite chambre de malaxage (4) et agencé pour être mis en mouvement à une vitesse de rotation par un moteur (23), c) a rotary kneading in said kneading chamber (4) of said solid phase with said liquid phase to form a mixing mixture by a kneading arm (18) passing through said kneading chamber (4) and arranged to be set in motion at a speed of rotation by a motor (23),
d) un pompage dudit mélange à un troisième débit de pompage (05) vers une sortie de mélange (12) dudit malaxeur (2) reliée à un premier orifice d'entrée (13) d'une lance de projection (14), e) une projection dudit mélange par un deuxième orifice de projection (15) de ladite lance de projection traversée par ledit mélange provenant de ladite sortie de mélange, d) pumping said mixture to a third pumping rate (05) to a mixing outlet (12) of said mixer (2) connected to a first inlet (13) of a projection lance (14), e a projection of said mixture by a second projection orifice (15) of said projection lance traversed by said mixture originating from said mixing outlet,
f) une mesure d'au moins une variable rhéologique dudit mélange donnant une première valeur de variable rhéologique qui est codée en un premier signal {S1), f) a measure of at least one rheological variable of said mixture giving a first rheological variable value which is encoded into a first signal (S1),
g) une réception dudit premier signal par un moyen de contrôle (25) générant un deuxième signal (S2) de sortie vers un régulateur de vitesse (26) dudit moteur rotatif (23), g) receiving said first signal by control means (25) generating a second output signal (S2) to a speed controller (26) of said rotary motor (23),
ledit bras de malaxage (18) traversant ladite chambre de malaxage (4) comprend dans son prolongement une vis excentrique (21 ) s'étendant au travers d'une sortie ( 0) de la chambre de malaxage (4) reliée à une entrée d'un étage de compression (1 1 ) d'une pompe, laquelle vis excentrique (21 ) s'étend au travers de la sortie (10) et se termine dans un étage de compression d'une pompe (1 1 ) où a lieu ladite étape de pompage dudit mélange, laquelle vis excentrique formant ainsi un rotor (21 ) de la pompe, ledit bras de malaxage commandant ledit deuxième débit (D2) d'amenée de ladite phase solide vers ladite chambre de malaxage (4) et ledit troisième débit de pompage (D5) dudit mélange, lequel procédé est caractérisé en ce que l'étape de mesure de ladite variable rhéologique est réalisée au niveau de ladite lance de projection
(14), ledit régulateur de vitesse (26) traitant ledit deuxième signal de sortie (S2) pour ensuite commander ledit moteur mettant en rotation ledit bras de malaxage et réguler ladite vitesse de rotation dudit bras de malaxage et induire une variation simultanément dudit deuxième débit d'amenée de ladite phase solide et dudit troisième débit (D5) de pompage dudit mélange. said mixing arm (18) passing through said mixing chamber (4) comprises in its extension an eccentric screw (21) extending through an outlet (0) of the mixing chamber (4) connected to an inlet of a compression stage (1 1) of a pump, which eccentric screw (21) extends through the outlet (10) and ends in a compression stage of a pump (1 1) where takes place said step of pumping said mixture, which eccentric screw thus forming a rotor (21) of the pump, said mixing arm controlling said second flow (D2) for feeding said solid phase to said mixing chamber (4) and said third pumping rate (D5) of said mixture, which process is characterized in that the step of measuring said rheological variable is performed at said projection lance (14), said speed controller (26) processing said second output signal (S2) to then drive said motor rotating said kneading arm and regulate said rotational speed of said kneading arm and induce a variation of said second flow simultaneously supplying said solid phase and said third flow (D5) for pumping said mixture.
1 1 . Procédé selon la revendication 10, caractérisé en ce qu'il comprend en outre une première étape de comparaison dans laquelle ledit premier signal ($1) est comparé à un premier signal de référence correspondant à une deuxième valeur de variable rhéologique de référence à l'aide d'un premier calculateur de comparaison dudit moyen de contrôle (25) traitant en entrée ledit premier signal (S1) et ledit premier signal de référence pour produire en sortie ledit deuxième signai (S2) et l'envoyer vers ledit régulateur de vitesse (26). 1 1. A method according to claim 10, characterized in that it further comprises a first comparison step wherein said first signal ($ 1) is compared to a first reference signal corresponding to a second reference rheological variable value using a first comparison calculator of said control means (25) inputting said first signal (S1) and said first reference signal to output said second signal (S2) and send it to said speed controller (26); ).
12. Procédé selon la revendication 1 1 , dans lequel ledit deuxième signal correspond à une différence calculée entre, d'une part, ladite première valeur de variable rhéologique et, d'autre part, ladite deuxième valeur de variable rhéologique de référence, ledit deuxième signal (S 2) étant traité en entrée dudit régulateur de vitesse (26) qui décode ledit deuxième signal et le traduit en sortie en une variation simultanément dudit deuxième débit d'amenée de ladite phase solide (D2) et dudit troisième débit de pompage (D5) dudit mélange. The method according to claim 11, wherein said second signal corresponds to a difference calculated between, on the one hand, said first rheological variable value and, on the other hand, said second reference rheological variable value, said second signal (S 2) being processed at the input of said speed regulator (26) which decodes said second signal and translates it into an output simultaneously of said second feed rate of said solid phase (D2) and said third pump flow ( D5) of said mixture.
13. Procédé selon la revendication 12, dans lequel l'étape de traitement dudit deuxième signal par ledit régulateur de vitesse (26) est une étape de régulation de type proportionnel-intégral-dérivé. The method of claim 12, wherein the step of processing said second signal by said speed controller (26) is a proportional-integral-derivative type control step.
14. Procédé selon l'une quelconque des revendications 10 à 13, dans lequel ladite variation dudit deuxième débit d'amenée de ladite phase solide (D2) et dudit troisième débit de pompage (D5) dudit mélange est réalisée jusqu'à ce que ladite au moins une variable rhéologique atteigne une valeur préalablement déterminée.
The method according to any one of claims 10 to 13, wherein said variation of said second feed rate of said solid phase (D2) and said third pump flow (D5) of said mixture is carried out until said at least one rheological variable reaches a predetermined value.
15. Procédé selon l'une quelconque des revendications 1 à à, dans lequel ladite au moins une variable rhéologique dudit mélange la pression.
The method of any one of claims 1 to 7, wherein said at least one rheological variable of said pressure mixture.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP14759195.2A EP3041600B1 (en) | 2013-09-06 | 2014-09-04 | Device for spraying a mixture and method for preparing a mixture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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BE2013/0584 | 2013-09-06 | ||
BE2013/0584A BE1021363B1 (en) | 2013-09-06 | 2013-09-06 | PROJECTOR MACHINE. |
Publications (1)
Publication Number | Publication Date |
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WO2015032878A1 true WO2015032878A1 (en) | 2015-03-12 |
Family
ID=49385061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/068880 WO2015032878A1 (en) | 2013-09-06 | 2014-09-04 | Device for spraying a mixture and method for preparing a mixture |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3041600B1 (en) |
BE (1) | BE1021363B1 (en) |
WO (1) | WO2015032878A1 (en) |
Cited By (12)
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CN104908163A (en) * | 2015-06-19 | 2015-09-16 | 江苏博拓新型建筑材料有限公司 | Multi-functional pouring stirrer |
CN108579487A (en) * | 2018-04-26 | 2018-09-28 | 段满红 | A kind of working method of the industrial liquid material mixing equipment based on eccentric injection mixing principle |
CN109966983A (en) * | 2019-04-09 | 2019-07-05 | 江苏中砼新材料科技有限公司 | A kind of blender convenient for cleaning and dredging for concrete additive production |
WO2020260377A1 (en) * | 2019-06-26 | 2020-12-30 | Saint-Gobain Weber | System for manufacturing mortar-based elements |
EP3756844A1 (en) * | 2019-06-26 | 2020-12-30 | Saint-Gobain Weber | Method for manufacturing mortar-based elements |
CN112339125A (en) * | 2020-09-28 | 2021-02-09 | 温州承朋贸易有限公司 | Energy-saving environment-friendly automatic proportioning control automatic material supplementing device for mining accelerator |
CN112403386A (en) * | 2021-01-22 | 2021-02-26 | 山东星链信息科技有限公司 | Sewage purification is with automatic loading attachment that matches of supplementary material |
CN112571619A (en) * | 2020-12-08 | 2021-03-30 | 华杏昌 | Multilayer combination formula agitating unit for construction |
CN113713694A (en) * | 2021-09-10 | 2021-11-30 | 南通腾龙化工科技有限公司 | Production device and production process of low-cost AKD sizing agent |
CN113894929A (en) * | 2021-09-01 | 2022-01-07 | 中电建路桥集团有限公司 | Intelligent grouting equipment for water-rich silty-fine sand stratum |
CN115284440A (en) * | 2022-08-22 | 2022-11-04 | 楚雄佑琳生科技有限公司 | Phosphogypsum key technology development and equipment |
RU2813506C2 (en) * | 2019-06-26 | 2024-02-12 | Сэн-Гобэн Вебер | Method for making elements based on mortar |
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DE102018111120A1 (en) * | 2018-05-09 | 2019-11-14 | J. Wagner Gmbh | Method for operating a conveying device and conveying device |
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DE2218418A1 (en) * | 1972-04-17 | 1973-10-31 | Wilhelm Fleissner | MIXING AND SPRAYING DEVICE FOR PLASTIC AND GRAINY GOODS |
DE2701508A1 (en) * | 1977-01-15 | 1978-07-20 | Maurer Dietrich | Mixing solids and liq. to make slurry - where pressure required to convey slurry adjusts liq. addn. to obtain constant mixt. |
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DE4041727A1 (en) * | 1990-12-24 | 1992-07-02 | Bergwerksverband Gmbh | Quick-setting foam mortar - has pressure monitor at pressure pump connection and feed lines to control feed of dry material and or water to mixer |
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- 2013-09-06 BE BE2013/0584A patent/BE1021363B1/en not_active IP Right Cessation
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- 2014-09-04 EP EP14759195.2A patent/EP3041600B1/en not_active Not-in-force
- 2014-09-04 WO PCT/EP2014/068880 patent/WO2015032878A1/en active Application Filing
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DE2218418A1 (en) * | 1972-04-17 | 1973-10-31 | Wilhelm Fleissner | MIXING AND SPRAYING DEVICE FOR PLASTIC AND GRAINY GOODS |
DE2701508A1 (en) * | 1977-01-15 | 1978-07-20 | Maurer Dietrich | Mixing solids and liq. to make slurry - where pressure required to convey slurry adjusts liq. addn. to obtain constant mixt. |
DE8234022U1 (en) * | 1982-12-03 | 1983-03-31 | Hochtief Ag Vorm. Gebr. Helfmann, 4300 Essen | DEVICE FOR MEASURING PRESSURE IN A CONCRETE DELIVERY PIPE |
DE4041727A1 (en) * | 1990-12-24 | 1992-07-02 | Bergwerksverband Gmbh | Quick-setting foam mortar - has pressure monitor at pressure pump connection and feed lines to control feed of dry material and or water to mixer |
DE19512098C1 (en) * | 1995-04-03 | 1996-09-12 | Nolta Gmbh | Control device for multi-phase flow such as "ready-mixed" concrete used in construction industry |
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CN104908163A (en) * | 2015-06-19 | 2015-09-16 | 江苏博拓新型建筑材料有限公司 | Multi-functional pouring stirrer |
CN108579487B (en) * | 2018-04-26 | 2021-01-26 | 南京博臣农化有限公司 | Working method of industrial liquid material mixing equipment based on eccentric jet mixing principle |
CN108579487A (en) * | 2018-04-26 | 2018-09-28 | 段满红 | A kind of working method of the industrial liquid material mixing equipment based on eccentric injection mixing principle |
CN109966983A (en) * | 2019-04-09 | 2019-07-05 | 江苏中砼新材料科技有限公司 | A kind of blender convenient for cleaning and dredging for concrete additive production |
WO2020260377A1 (en) * | 2019-06-26 | 2020-12-30 | Saint-Gobain Weber | System for manufacturing mortar-based elements |
EP3756845A1 (en) * | 2019-06-26 | 2020-12-30 | Saint-Gobain Weber | System for manufacturing mortar-based elements |
WO2020260375A1 (en) * | 2019-06-26 | 2020-12-30 | Saint-Gobain Weber | Method for manufacturing mortar-based elements |
EP3756844A1 (en) * | 2019-06-26 | 2020-12-30 | Saint-Gobain Weber | Method for manufacturing mortar-based elements |
CN114080310A (en) * | 2019-06-26 | 2022-02-22 | 圣戈班韦伯公司 | System for manufacturing mortar-based elements |
RU2813506C2 (en) * | 2019-06-26 | 2024-02-12 | Сэн-Гобэн Вебер | Method for making elements based on mortar |
CN112339125A (en) * | 2020-09-28 | 2021-02-09 | 温州承朋贸易有限公司 | Energy-saving environment-friendly automatic proportioning control automatic material supplementing device for mining accelerator |
CN112571619A (en) * | 2020-12-08 | 2021-03-30 | 华杏昌 | Multilayer combination formula agitating unit for construction |
CN112403386A (en) * | 2021-01-22 | 2021-02-26 | 山东星链信息科技有限公司 | Sewage purification is with automatic loading attachment that matches of supplementary material |
CN112403386B (en) * | 2021-01-22 | 2021-05-04 | 山东星链信息科技有限公司 | Sewage purification is with automatic loading attachment that matches of supplementary material |
CN113894929A (en) * | 2021-09-01 | 2022-01-07 | 中电建路桥集团有限公司 | Intelligent grouting equipment for water-rich silty-fine sand stratum |
CN113713694A (en) * | 2021-09-10 | 2021-11-30 | 南通腾龙化工科技有限公司 | Production device and production process of low-cost AKD sizing agent |
CN115284440A (en) * | 2022-08-22 | 2022-11-04 | 楚雄佑琳生科技有限公司 | Phosphogypsum key technology development and equipment |
Also Published As
Publication number | Publication date |
---|---|
EP3041600A1 (en) | 2016-07-13 |
BE1021363B1 (en) | 2015-11-06 |
EP3041600B1 (en) | 2019-02-06 |
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