Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B28—WORKING CEMENT, CLAY, OR STONE
  • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
  • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
  • B28C7/04—Supplying or proportioning the ingredients
  • B28C7/0404—Proportioning
• • 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
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
  • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
  • C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value

Definitions

• the present invention relates to a method and an apparatus for adding one or more additives, liquid or suspended in a liquid, to a multi-component material comprising at least one liquid entering into its composition, this liquid which enters the composition of said material reacting with one or more of the other components of this material, with a view to the implementation of the latter.
• the invention is particularly applicable, in the field of building or public works, to the addition of additives or adjuvants, in particular one or more dyes, to water which reacts to the components of a material of the mortar, concrete, plaster or plaster type, which combines with a hydraulic binder which this material comprises.
• exterior plasters for example, can be carried out by one or other of the following methods:
• Another coloring process tending to replace that above, consists in adding a predetermined dose of coloring product to the mixing water and then mixing a white mortar with this colored water.
• the quantity of coloring product is calculated by proceeding to the ratio between the mass of binder (cement, lime, plaster) that the material comprises and the quantity of water necessary for its mixing.
• the amount of coloring product, in particular iron oxide, is determined by weighing.
• Other additives can be added, by calculating the quantity of these additives in the same way.
• the pump flow rate being fixed (for example, 3 or 7 or 1 1 or 15 liters per hour) and its precision being only 5% of the volume;
• the present invention aims to remedy all of these essential practical drawbacks, by providing a method for adding one or more additives, liquid or suspended in a liquid, to a material with several components comprising at least one liquid. entering into its composition, as well as an apparatus for the implementation of this process, which make it possible to respond precisely to the needs of their users, in particular with regard to the production of a determined quantity of material of a certain shade , without problems of imprecision of the amount of additive added or of abrasion in the devices used, and which can be used easily on a building site, that is to say without involving constraints of electrical supply, heaviness of the device, limitations as to permitted dosages or cleaning.
• the process which it concerns comprises the successive operations consisting of:
• the liquid itself which receives the additive and which serves as a vehicle for mixing this additive with the other components of the material.
• the invention therefore makes it possible to eliminate the weighing of the additive and to obtain, in the case of a coloring product, a precise shade of material.
• the two dosing devices make it possible to determine a precise quantity of additive.
• this second device is put into operation, while in the case of a proportion of additive exceeding this same range, the first device is also put into operation, these two devices then acting jointly to dose the quantity of additive precisely required.
• This quantity of additive dosed by one or both devices is not mixed with the liquid in one and / or the other of the devices but is mixed with the liquid downstream of the device located furthest downstream.
• the liquid loaded with additive does not pass through the devices, which, in the case of very abrasive additives such as iron oxides generally constituting the coloring products used for coloring materials of the mortar, concrete, plaster or plaster type, eliminates any damage to these devices, in particular their pumping systems.
• These devices can therefore be of the common type, that is to say of the type of those normally used for metering non-abrasive additives, and the abovementioned cleaning problems are eliminated.
• the method advantageously includes the operations consisting of:
• volumetric metering devices operating an additive metering while being actuated by the pressure of said liquid.
• the liquid is water
• the source of liquid under pressure can simply be a pipe connected to the water distribution network.
• the method can however be implemented by using metering devices actuated by a source of energy of their own, in particular electrical.
• the additive is then in particular an iron oxide in suspension in water, which is usually a coloring product used to color such a material.
• the device includes:
• the metering devices are advantageously of the type actuated automatically by the quantity of liquid entering into the composition of the material, which is under pressure and which passes through them.
• Said first metering device is preferably that sold by the company DOSATRON INTERNATIONAL (located at TRESSES 33370,
• Each of these two devices is modified to allow it to dose abrasive additives or not, in particular as mentioned above, these modifications consisting: - in the upper closure of the metering chamber of each device, to isolate this chamber from said liquid which passes through the device, in order to prevent any mixing of this additive and this liquid within the device, and
• the non-return valve located at the bottom of the metering chamber of each device includes a ceramic or stainless steel ball
• connection of the additive suction tube is of the quick connection type to avoid air intakes (instead of a conventional connection by thread).
• INTERNATIONAL have been selected for their operation without electricity and the proportional volumetric dosage they allow (dose / quantity of liquid).
• the method according to the invention can however be implemented by means of any other similar volumetric device, provided that the appropriate modifications indicated above are carried out.
• an upstream valve for controlling the flow of liquid may be provided; the control handle of this valve can be located in the outer part of a box housing the device, so as to easily reach this handle.
• the apparatus may also comprise a homogenization device for mixing the dose of additive determined by one or both of the metering devices with the liquid, this homogenization device preferably operating by means of the pressure of the liquid and allowing mixing. of this liquid and the additive before the mixture leaves the device.
• a non-return valve can be provided, downstream of the metering devices and upstream of the connection of the additive supply branches, to prevent this additive from entering the metering devices.
• the introduction of the liquid mixed with the additive into the material must not take place continuously (for example, if the material is contained in a tank, in a concrete mixer or in a spraying machine etc.), it is possible to provide a metering valve operating with liquid pressure, which can program the quantity of liquid to be injected. This valve will be positioned at the level of the mains water supply.
• An easy-to-use cleaning system can also be installed, for example in the form of a three-way cleaning valve, which includes water outlets fitted with quick couplings of diameters identical to those allowing the connection of the suction pipes. of additive, and a line connected to a cleaning gun.
• the apparatus according to the invention can also be arranged in an at least partially electrically controlled version.
• this device includes:
• Figure 1 is a side view, in partial longitudinal section, of a volumetric metering device, the device according to the invention comprising two of these devices, modified;
• Figure 2 is a side view of the apparatus according to the invention, according to a first version;
• Figure 3 is a view of a modified metering device, which includes a second version of the device;
• Figure 4 is a view of two metering devices, modified according to this second version, and
• Figure 5 is a schematic and very simplified view of the device according to this second version.
• FIG. 1 represents a volumetric metering device, of the kind making it possible to meter a product in proportion to a quantity of liquid under pressure, generally water, passing through this device and to add this product to this liquid within this device.
• the device shown is one of those manufactured and marketed by the company DOSATRON INTERNATIONAL, which is well known in itself and will therefore not be described precisely. It comprises a body 1 delimiting a chamber 2, a piston 3 integral with a rod 4, an orifice 5 for the entry of pressurized liquid, this liquid tending to move the piston 3 upwards, a lower chamber 6 for metering an additive, the lower part of which is connected to a pipe 7 for supplying the additive and the upper part of which opens into a chamber 8 for mixing this additive and the liquid flowing in the device, a piston 9 carried by the rod 4, which comprises at least one valve and which moves in the chamber 6, a valve in the lower part of the chamber 6, means (not visible in FIG. 1) authorizing the descent of the piston 3 beyond a determined top dead center, to allow said mixing in chamber 8 and to evacuate this mixture through an outlet orifice 10.
• a such a device further comprises a lower cup 1 1 said
• FIG. 2 shows an apparatus 20 intended to be used on a building site, to allow the addition of one or more additives, liquid or in suspension in a liquid, in particular one or more dyes, to water intended for be added to the components of a material such as mortar, concrete, plaster or plaster, for the implementation of this material.
• the apparatus 20 comprises a box (not shown) in which are successively placed:
• the device comprises four three-way valves (not shown), two of which are located immediately on either side of the device 24 and are connected by a bypass pipe making it possible to bypass (“by-pass") this device. 24, and the other two of which are located immediately on either side of the device 25 and are connected by a bypass pipe making it possible to bypass this device 25.
• the filter 22 makes it possible to ensure the perfect quality of the water entering the device 1, by eliminating the impurities (sand, etc.) which can, on a site, get lodged in the fittings of this pipe. in order to prevent any damage to the organs placed downstream.
• the flow limiter 23 makes it possible to limit the flow of water in the apparatus 20, in the event of an increase in pressure in the distribution network, so that this flow remains permanently below that admissible by the organs placed downstream, in particular the devices 24 and 25.
• These are respectively those sold by the company DOSATRON under the reference DM 6 and DI210, making it possible to dose an additive as a function of the amount of water passing through them, as described above. .
• the homogenization device 28 allows, at by means of the pressure of the water passing through the apparatus 20, to mix the dose of additive determined by one or by the two devices 24, 25 with this water.
• either one or the other of the devices 24, 25 is used, or the two devices 24, 25 are used, depending on the proportion of additive to be dosed as a function of the amount of water passing through these devices.
• the two devices 24 and 25 are put into operation and then act jointly to dose the quantity additive specifically required.
• the pipe (s) 7 are immersed in the additive tank (s) then a supply valve (not shown) is open to allow passage pressurized water through the various organs of the apparatus 20, in order to carry out the metering of the additive and then the homogeneous mixture of this water and this additive.
• the device 20 thus designed is handy, easy to use, withstands the ambient conditions (dust and humidity), possible shocks and does not need electricity to operate. It saves labor time and is very safe to operate, since it does not require electricity, pressurized air or excessive water pressure, and no moving parts are required. is apparent.
• a very significant advantage of this device is that it allows a volumetric dosage of the additive proportional to the passage of water, whatever the pressure of this water.
• the device is also versatile and can be used as an auxiliary to any equipment (concrete mixer, spraying machine, plastering machine or silo with automatic feeding and mixing, simple mixing tank, etc.).
• One or more devices 24 and / or 25 can be added to obtain the desired percentage of additive, for example beyond a proportion of 11.9%, while remaining within the usual application standards.
• FIGS. 3 and 4 represent the devices 24 and 25 fitted with functional assemblies 35, 36 to allow their control by electrical means, within the framework of the second version of the apparatus 20 shown in FIG. 5.
• each device 24, 25 is equipped with an electrically controlled assembly 35, which makes it possible to block its operation; this set 35 includes:
• the piston 3 is thus blocked in a position in which the flow of the liquid is permitted but in which no metering is carried out.
• Each device 24, 25 could comprise its own plate 41 and not a common plate as shown in FIG. 4.
• the assembly 35 further comprises a presence detector 45 of the optical type, mounted on the plate 41 facing the rod 40, while the rod 40 comprises a socket 46 fixed on it, the passage of which opposite said detector 45 is suitable for being detected by this detector 45.
• the detector 45 is connected to electronic means for accounting for said passages of the socket 46 facing it during the operating cycles of the device. This assembly 35 therefore makes it possible to determine the quantity of liquid flowing through these devices and therefore the quantity of additive dosed.
• Each assembly 36 comprises, as shown in FIG. 3:
• a longitudinal plate 50 fixed along the lower part of each device 24, 25 by means of a collar 51 tightening the base of the body 1 of the latter; a threaded rod 52 rotatably mounted on the plate 50; a gear motor 53 for driving this rod in rotation
• the control of the geared motor thus makes it possible to raise or lower the nut 54 and therefore the metering device 1 1, to adjust the volume of additive metered at each reciprocating cycle of the pistons 3 and 7.
• the assembly 36 also includes a potentiometer 57 carried by the plate 50, making it possible to detect each revolution of the rod 52 and to count these revolutions to determine the axial position of the nut 54 and of the metering device 11.
• FIG. 5 shows said second version of the apparatus 20.
• this device comprises, in addition to the filter 22, devices 24, 25 equipped with the assemblies 35 and 36, element 26, pipes 27 and device 28:
• an electricity generator 61 connected to this turbine 60; a storage battery 62 at 12 V, supplying the devices that comprise the sets 35 and 36, a screen / control panel 63, grouping the data collected by said sets 35 and 36, a solenoid valve 64 located upstream of the device 24 and downstream of a pipe 65, as well as an electronic card comprising the electronic members allowing the operation of the assembly (microprocessor, EPROM memories, Clock ).
• the solenoid valve 64 allows the apparatus 20 to operate on / off, as well as, when it is closed, the upstream cleaning of the apparatus 20 via line 65.
• the device thus developed in electronic version is an automaton which can be programmed taking into account several parameters and is capable of calculating several formulas (density of the additive, water / cement ratio of each product, quantity of the additive according to the desired effect). It is possible to include other parameters as desired, by adding suitable sensors to transmit information to the device (current and / or future air temperature, water temperature, air humidity, aggregate humidity, etc.).

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Dispersion Chemistry (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Organic Chemistry (AREA)
• Accessories For Mixers (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=9529221

Family Applications (1)

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Family Cites Families (5)

• 1998
  • 1998-07-24 FR FR9809796A patent/FR2781392B1/fr not_active Expired - Fee Related
• 1999
  • 1999-07-23 BR BR9912383-5A patent/BR9912383A/pt not_active IP Right Cessation
  • 1999-07-23 MX MXPA01000799A patent/MXPA01000799A/es not_active IP Right Cessation
  • 1999-07-23 WO PCT/FR1999/001821 patent/WO2000005047A1/fr not_active Application Discontinuation
  • 1999-07-23 EP EP99932965A patent/EP1100663A1/de not_active Withdrawn
  • 1999-07-23 AU AU49164/99A patent/AU4916499A/en not_active Abandoned
  • 1999-07-23 AR ARP990103635A patent/AR021166A1/es unknown

Non-Patent Citations (1)

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