EP0779135A1 - Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions - Google Patents

Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions Download PDF

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Publication number
EP0779135A1
EP0779135A1 EP95119700A EP95119700A EP0779135A1 EP 0779135 A1 EP0779135 A1 EP 0779135A1 EP 95119700 A EP95119700 A EP 95119700A EP 95119700 A EP95119700 A EP 95119700A EP 0779135 A1 EP0779135 A1 EP 0779135A1
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EP
European Patent Office
Prior art keywords
component
medium
conveying
unit
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95119700A
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German (de)
English (en)
Inventor
Rolf Widmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sika Equipment AG
Original Assignee
Aliva AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aliva AG filed Critical Aliva AG
Priority to EP95119700A priority Critical patent/EP0779135A1/fr
Publication of EP0779135A1 publication Critical patent/EP0779135A1/fr
Withdrawn legal-status Critical Current

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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
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/0404—Proportioning
    • B28C7/0409—Proportioning taking regard of the moisture content of the solid ingredients; Moisture indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/02—Controlling the operation of the mixing
    • B28C7/022—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component
    • B28C7/024—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component by measuring properties of the mixture, e.g. moisture, electrical resistivity, density

Definitions

  • the present invention relates to a method of the type specified in the preamble of claim 1 and an installation of the type specified in the preamble of claim 7.
  • the aim of the present invention is to create a method or a system of the type mentioned at the beginning, by means of which temporal variations of the spraying medium with regard to its composition are automatically remedied, with the aim of ensuring that mixing ratios of the spraying medium which have been set once, as long as desired, are constant stay.
  • This should make a professional, practically permanent monitoring of the spraying process superfluous in the sense that the time intervals of such a check are at least significantly increased.
  • the quantity of at least one medium component output per unit of time is measured and this measured quantity, as the actual value, is used in a control system, with the aid of which the actual quantity sprayed out per unit of time, depending on the design of the control loop with a required accuracy, can be predetermined Leading value or trend follows.
  • the sprayed-out quantity of a single spraying medium component is regulated in the sense mentioned.
  • the sprayed-out medium comprises air as one component and another component which is in powder or granule form or is sludge-like, viscous viscous, or is in the form of a suspension, in particular a coarse-grained suspension, such as in the form of concrete.
  • Another liquid component such as additional water, is provided.
  • the regulated amount is that of at least one of the components mentioned or the mixing ratio of at least two of the components mentioned.
  • the spraying technology mentioned two procedural principles are known, in particular with a view to concrete spraying, namely spraying using the thin-flow method or spraying using the dense-current method.
  • one component e.g. Concrete or, more generally, the powdery, granular, viscous viscous or suspension-shaped component is pneumatically conveyed against the injection mold by means of air.
  • the component just mentioned e.g. Concrete, as such, usually pre-conveyed by means of pumps and only torn open in the sprayable state in the region of the ejection tool by means of an air stream.
  • the term “conveying path” for a medium or a component thereof means the path on a system, starting from the area in which the material under consideration is supplied to the system from the outside, for example being filled in, until it emerges from the injection mold .
  • the schematically illustrated conveying path 2 for the spray medium or a component of this medium comprises a conveying unit 1, a line 3 connected downstream thereof, to an injection tool 5.
  • a measuring arrangement 6 is generally provided along the conveying path 2, for example and, as shown, along the line 3, a detector or sensor, by means of which the amount of the medium under consideration or a component of this medium conveyed per unit of time in the direction of the arrow F is measured becomes.
  • a preferably electrical signal s (V ⁇ ) proportional to the quantity per unit time is generated, which is fed to a difference-forming unit 7 after appropriate signal processing (not shown).
  • the detector 6 shown in Fig. 1 downstream of the conveyor unit 1 is used in certain cases, e.g. in the case of upstream conveying using the thin-stream method, assigned to the conveying unit 1.
  • the output of a preferably adjustable signal source 9 is also fed to the difference formation unit 7.
  • the signal supplied to unit 7 by detector 6 forms the measured control signal X, while the signal supplied to unit 7 by unit 9 forms the command signal W.
  • a control difference signal ⁇ appears, which, via a controller 11 designed according to control engineering aspects, is applied to a control input 1 S of the control element Conveyor 1 acts.
  • the procedure according to the invention is in principle as shown in FIG. 2.
  • two delivery paths 2a, b are shown for a component of the ejection medium, which unite in the area of the injection mold 5.
  • a detector 6a or 6b is provided along the corresponding conveying paths 2a, b, as shown, for example, on the assigned lines 3a, 3b.
  • the explanations given with regard to the detector arrangement with reference to FIG. 1 also apply here.
  • FIG 3 schematically shows an ejection system according to the invention, which works according to the dense-flow principle.
  • a first medium component M 1 which is granular or powdery or viscous or sludge-like or forms a particularly coarse-grained suspension, such as and in particular concrete, is fed to a first conveying unit 20.
  • the medium M 1 is delivered to the injection mold 23 by pumps, for example by means of a piston pump according to FIG. 5, through the delivery line 21.
  • a second medium component M 2 namely a gaseous, in particular air, is driven against the injection mold 23 through a conveying line 27.
  • the line 27 merges with the line 21 shortly before the injection mold 23, so that, due to the conveyed compressed air, the component M 1 is torn open for the subsequent spraying.
  • the principle of dense phase conveyance is defined by the arrangement 20 to 27:
  • the medium component M 1 is pre-pumped as a dense stream in line 21.
  • the conveying device 29 is used to advance a third, liquid component M 3 through the associated line 31, which in turn merges with the aforementioned lines 21 and 27 in the area in front of the injection mold 23.
  • measuring detectors 35 are now provided on such a system. While the gaseous medium component M 2 can be detected by means of conventional gas flow sensors in line 27 and the amount of the liquid component M 3 in the same conventional manner with liquid flow detectors on line 31, the component M 1 conveyed per unit of time along line 21 is, for example, by using a detector of the "Speedmag PulseMag type V "from Endress + Hauser AG, CH-4153 Reinach BL.
  • detectors 35a to 35c are provided on the conveying paths mentioned, depending on the quantity of components or medium to be guided in terms of control technology or the conditions to be guided.
  • the output or the outputs of the optionally provided detectors 35 x are supplied to the unit 10, basically constructed as explained with reference to FIGS. 1 and 2.
  • control signals are output for the actuators 20, 25 and 29 to be used in accordance with the variables to be controlled.
  • the ratio of the component M 1 to M 2 to M 3 is preferably performed, for which purpose the ratio output signal of 35a to output signal of 35b to output signal of 35c is formed on the quotient formation unit 17 of FIG or the respective relationships are formed in pairs and compared with the respective management parameters.
  • FIG. 4 shows, analogously to FIG. 3, a plant operating according to the invention using the thin-current method.
  • Component M 1 as defined above, is fed to a conveyor unit 40, to which the outlet of an air conveyor unit 42 for component M 2 - air - is connected.
  • Component M 1 is conveyed pneumatically here by air pressurized by conveyor 42.
  • the supply of component M 3 by means of The conveying device 44 via line 46 is carried out analogously to the conveying of this component M 3 according to FIG. 3.
  • the conveying quantity of the air component M 2 can in turn be measured without any major problems using a detector 48b, for example on the connecting line between compressor conveying device 42 and conveying device 40 the delivery rate of the liquid component M 3 by means of a detector 48c along line 46.
  • the delivery rate of the component M 1, on the other hand, is detected by the detector 48a, which is provided on the conveyor device 40, before this component M 1 is detected and conveyed by the compressed air of the conveyor 42 becomes.
  • an inductively operating detector of the aforementioned type can also be used for the measurement of the conveyed component quantity of M 1 in the thin-flow method, and there are no essential problems which arise if, for example, a volume flow measurement would be carried out in line 49 on the already pneumatically conveyed component M 1 .
  • the output signals of the detectors 48 provided are directed to a control device according to block 10 of FIGS. 1 to 3, which, by means of control interventions on the conveying devices 40, 42 and 44, guides the quantities of components conveyed individually or sets or sets their quantity ratio . leads.
  • FIG. 5 schematically shows a conveying device for the dense phase conveying corresponding to the conveying device 20 from FIG. 3. It is used in particular for the dense phase conveying of concrete spray medium. It comprises at least two piston / cylinder arrangements 51A and 51B, which are driven in opposite phases by means of a hydraulic drive unit 53, each by means of a hydraulic piston / cylinder arrangement.
  • the piston / cylinder assemblies 51A and 51B respectively act in a medium component, in particular concrete tank 55 on the one hand and on the other hand in an S-shaped curved connecting pipe 57, the outlet of which is connected to the spray nozzle 61 via a line arrangement 59.
  • the S-shaped connecting pipe 57 oscillates, driven around the axis A of the line system connection, in such a way that the piston / cylinder arrangement-side opening of the S-shaped connecting line 57 is sequentially sealingly connected to the piston / cylinder arrangements 51A, 51B.
  • Component M 1 is filled into tank 55. If this conveying device is used as an actuator in the control system according to the invention, the control intervention on the drive unit 53 takes place.
  • FIG. 6 schematically shows the principle of a known conveying device 40 for the thin-stream conveying of the medium component M 1 . It comprises a rotor 60 which is rotatably driven about an axis A and has receiving bushes 64 provided on the periphery.
  • a filling device 66 such as a filling funnel, is mounted in a stationary manner. By rotating the rotor 60 between the sealing plates 61, 62, one sleeve 64 after the other is filled with the medium M 1 through the filling device 66.
  • a compressed air line 68 is provided in a stationary manner. The filled cans 64 are successively sealed to the mouth of the compressed air line 68. In this position, the medium component M 1 is ejected from the discharge opening 72 in the sealing plate 61 by the compressed air M 21 .
  • a further compressed air line 74 is pressurized with compressed air M 22 for the further pneumatic advance of the respective portions.
  • the detector 48a is preferably in the form of an inductive detector, like a "Speedmag Pulsmag V" detector from Endress + Hauser AG, CH-4153 Reinach BL, mounted in the area of the stationary filling device 66 or the funnel, which on the one hand has the advantages that the detector can be installed in a fixed position by providing only one detector is and in particular that the amount of component M 1 delivered can be measured in a relatively simple manner before pneumatic delivery begins.
  • an inductive detector like a "Speedmag Pulsmag V" detector from Endress + Hauser AG, CH-4153 Reinach BL
  • the delivery rate of component M 2 namely the air, is preferably measured on a line (not shown) that feeds lines 68 and 74 together.
  • a conveyor unit of the type shown schematically in FIG. 7 is used as the second preferred solution instead of a detector 48a.
  • a rotary compression stage device 80 is provided, which is preferably a rotor device 60 according to FIG. 6. Instead of this, however, a cellular wheel sluice or, depending on the medium to be conveyed, a gear pump can also be used.
  • the rotary pressure stage device 80 analogous to the illustration in FIG. 6, feeds into a conveying line section 82, in which, by pressurizing via line 84, the conveying takes place pneumatically. Due to the pressurization through line 84, it turns out on the output side the device 80 is a pressure p 2 substantially above atmospheric pressure.
  • the pressure on the inlet side of the rotary pressure stage device 80 is essentially atmospheric pressure, is at least substantially lower than p 2 , so that the pressure difference ⁇ p corresponding to the difference (p 2 -p 1 ) lies above the rotary pressure stage device 80.
  • the rotary compression stage device 80 is fed by a further rotary conveyor unit 86, the speed n 86 of which can be set.
  • the conveying unit 86 can in turn be a cellular wheel sluice, a gear pump or, and preferably, a screw conveyor.
  • the delivery unit 86 is fed from the filling unit 66 according to FIG. 6 with the medium, usually under atmospheric pressure p 1 .
  • the quantity ⁇ of the medium M 1 output from the line 82 per unit of time is set exclusively by setting the delivery speed n 86 on the unit 86, whereas the unit 80 essentially serves exclusively to decouple the pressure between the outlet-side and inlet-side pressures.
  • the rotor 60 according to FIG. 6 the latter is therefore operated at a given, constant speed, and by adjusting the size, n 86 is measured to what extent the bushes 64 are filled.
  • the quantity ⁇ is given with high accuracy by the speed n 86 , with which, with reference to FIG. 6 and in a cross-comparison with FIG. 7, the actual quantity is given by the actual speed n 86 , with which the detector 48a can be omitted and, for example, by a Tachometer can be replaced.
  • the variable n 86 for example in the above-described ratio control, can be used as a manipulated variable for the amount ⁇ of the medium M 1 in the ratio control loop.
  • the precise coupling mentioned between the size ⁇ and the speed n 86 on the conveyor unit 86 results from the fact that the functions of pressure decoupling and quantity setting are separated.
  • FIG. 8 shows the preferred construction of the unit according to FIG. 7, which acts simultaneously as a detector and an actuator, is used, as mentioned, for powdery, granular media or for media which are in suspension, such as in particular for concrete.
  • a screw conveyor 90 is provided, driven by the drive unit 92, with an adjustable speed n 90 .
  • the rotor device 96 which is used here as a rotary pressure stage unit and is driven by the drive unit 98 at the speed n 96 , is fed via an outlet-side, preferably vertically arranged connection piece 94.
  • the rotary pressure stage unit 96 is preferably constructed like the rotor unit according to FIG. 6. In analogy to FIG. 7, its output acts in the delivery line section 100, into which the compressed air line 102 opens.
  • the present invention it is possible to carry out structural injections in which the sprayed medium is composed in an optimized manner in accordance with the respective requirements, it being ensured that this composition remains stationary as desired or varies in time as desired.
  • a spray medium e.g. Concrete or a medium lining the structure like a film can be used.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Nozzles (AREA)
EP95119700A 1995-12-14 1995-12-14 Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions Withdrawn EP0779135A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95119700A EP0779135A1 (fr) 1995-12-14 1995-12-14 Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95119700A EP0779135A1 (fr) 1995-12-14 1995-12-14 Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions

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EP0779135A1 true EP0779135A1 (fr) 1997-06-18

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EP95119700A Withdrawn EP0779135A1 (fr) 1995-12-14 1995-12-14 Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19838710A1 (de) * 1998-08-26 2000-03-09 Spritzbeton Stuttgart Gmbh & C Verfahren zur Herstellung spritzfertigen Spritzbetons
WO2002076698A3 (fr) * 2001-03-21 2002-11-28 Inotec Gmbh Procede d'application de mortier sur une surface de support
EP1508417A1 (fr) * 2003-07-24 2005-02-23 Services Petroliers Schlumberger Système de mélange

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019653A (en) * 1975-08-22 1977-04-26 Graco Inc. Automatic proportioning paint spray system
EP0035281A2 (fr) * 1980-03-05 1981-09-09 Engineering Resources Development Office Procédé et appareil pour projeter du mortier ou analogue
US4298288A (en) * 1980-01-25 1981-11-03 Anthony Industries, Inc. Mobile concreting apparatus and method
DE3641947A1 (de) * 1986-12-09 1988-06-23 Tubag Trass Zement Stein Verfahren zum aufbereiten von spritzmoertel oder spritzbeton sowie anlage zur durchfuehrung des verfahrens
JPH01285310A (ja) * 1988-05-13 1989-11-16 Fujita Corp 混和剤の自動供給混合装置
EP0357929A2 (fr) * 1988-09-08 1990-03-14 Tricosal Gmbh Procédé et dispositif de dosage d'accélérateurs de prise pour l'application de béton projeté

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019653A (en) * 1975-08-22 1977-04-26 Graco Inc. Automatic proportioning paint spray system
US4298288A (en) * 1980-01-25 1981-11-03 Anthony Industries, Inc. Mobile concreting apparatus and method
EP0035281A2 (fr) * 1980-03-05 1981-09-09 Engineering Resources Development Office Procédé et appareil pour projeter du mortier ou analogue
DE3641947A1 (de) * 1986-12-09 1988-06-23 Tubag Trass Zement Stein Verfahren zum aufbereiten von spritzmoertel oder spritzbeton sowie anlage zur durchfuehrung des verfahrens
JPH01285310A (ja) * 1988-05-13 1989-11-16 Fujita Corp 混和剤の自動供給混合装置
EP0357929A2 (fr) * 1988-09-08 1990-03-14 Tricosal Gmbh Procédé et dispositif de dosage d'accélérateurs de prise pour l'application de béton projeté

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 058 (M - 0930) 2 February 1990 (1990-02-02) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19838710A1 (de) * 1998-08-26 2000-03-09 Spritzbeton Stuttgart Gmbh & C Verfahren zur Herstellung spritzfertigen Spritzbetons
DE19838710C2 (de) * 1998-08-26 2002-03-21 Spritzbeton Stuttgart Gmbh & C Verfahren zur Herstellung spritzfertigen Spritzbetons
WO2002076698A3 (fr) * 2001-03-21 2002-11-28 Inotec Gmbh Procede d'application de mortier sur une surface de support
EP1508417A1 (fr) * 2003-07-24 2005-02-23 Services Petroliers Schlumberger Système de mélange

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