US3885716A - Appliance to measure out a given volume of powder - Google Patents

Appliance to measure out a given volume of powder Download PDF

Info

Publication number
US3885716A
US3885716A US310367A US31036772A US3885716A US 3885716 A US3885716 A US 3885716A US 310367 A US310367 A US 310367A US 31036772 A US31036772 A US 31036772A US 3885716 A US3885716 A US 3885716A
Authority
US
United States
Prior art keywords
receptacle
arm
powder
appliance
station
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.)
Expired - Lifetime
Application number
US310367A
Other languages
English (en)
Inventor
Claude Marechal
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.)
LafargeHolcim Ciments SA
Original Assignee
Lafarge Ciments SA
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 Lafarge Ciments SA filed Critical Lafarge Ciments SA
Application granted granted Critical
Publication of US3885716A publication Critical patent/US3885716A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/10Devices for withdrawing samples in the liquid or fluent state
    • G01N1/20Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials

Definitions

  • Apparatus includes a calibrated receptacle fixed to an arm connected to the output shaft of a motor which moves receptacle in a horizontal direction, a joint in the arm permitting that portion of the arm connected to the receptacle to rotate on its longitudinal axis for upturning the receptacle.
  • Preferably device includes a powder feed mechanism and means for measuring powder in the receptacle.
  • a number of physical analyses such as the quantitative analysis of lime, involve measuring out a given quantity of the substance to be analysed.
  • Quantitative analysis of the free lime content of a material such as cement clinker can be used in calculating the burning rate for an unfired material; in addition, automatic operation of a cement kiln can be regulated on the basis of the quantity of free lime in the clinker from the kiln. In fact, this has not previously been possible, since the clinker is not available until it has left the cooler, approximately half an hour after actual burning, further increasing the time needed to obtain the results of analyses, so that the free lime content of the clinker cannot be found quickly enough for kilnregulation purposes.
  • This invention overcomes the drawbacks of existing methods, offering a method of almost continuous analysis of free lime content, and allowing kiln-operating variables to be selected and balanced more efficiently.
  • Analysis of the free lime content is useful not only in automated kiln operation, but also in improving the quality and uniformity of the clinker, and consequently the cement.
  • the invention offers manufacturers an appliance to measure out a quantity of powder for analysis by industrial techniques, and more specifically an inexpensive, compact appliance for measuring out such a sample.
  • the invention concerns an appliance to measure out a given volume of powder with uniform grading, comprising a calibrated receptacle fixed on an arm connected to a motor which moves it in an approximately horizontal direction, a joint allowing the part of the arm to which the receptacle is attached to rotate on its longitudinal axis, upturning the receptacle, means of producing rotation of this part of the arm, means of returning the arm to the position in which the receptacle is filled, and means of causing vibration of the receptacle during at least part of its approximately horizontal movement.
  • this appliance to measure out a given volume of powder includes a powder-feed system, and a device for levelling off the surface of the powder in the receptacle.
  • the joint allowing the part of the arm to which the receptacle is attached to rotate is preferably located between the motor and the receptacle.
  • the means of producing rotation of the part of the arm to which the receptacle is attached comprises a device operating on the joint.
  • the motor is attached to a base plate, to which the device operating on the joint is attached, and which includes means for causing vibration of the receptacle.
  • the means for re turning the arm to the position in which the receptacle is filled includes a spring.
  • Vibration is preferably provided by a separate vihrator, operating either on the base or directly on the arm to which the receptacle is attached.
  • FIG. 1 is a perspective view of an appliance to measure out a given volume of powder, as proposed by the invention.
  • FIG. 2 is a diagram showing an automatic kilnoperating unit as proposed in the invention. using this appliance.
  • FIG. 1 shows an appliance 7 to measure out a given volume of powder with uniform grading, comprising a calibrated receptacle 8, fixed on an arm 9 connected to a motor 10 which drives it, thereby moving the receptacle in an approximately horizontal direction, around a circumference centered on the point 11, at which the arm 9 is attached to the vertical output shaft 12 of the motor 10.
  • the arm also has a device to ensure that it returns the receptacle 8 to its original position, such as a spring (not shown here).
  • the appliance also includes a powder-feed system 16, consisting of a hopper 17 and chute 18, which also vibrate, and the width of which corresponds to the length of the filling zone for the receptacle.
  • a scraper 19 levels off the surface of the contents of the receptacle.
  • the appliance operates as follows.
  • the arm 9 is driven by the motor 12, so that the receptacle 8 moves along a circular path, into a filling zone (position I), where the crushed clinker from the hopper 17 is poured into it.
  • the filling zone is the same width as the chute l8, and the receptacle 8 is filled as it moves under the chute. Simultaneously, its contents are compressed by the vibrations imparted to the arm 9. It then moves on until it reaches position II, where the surface of the contents is levelled off by a scraper 19.
  • the receptacle continues to position II], where a raised surface 14 operates the joint 13, upturning the receptacle and transferring the contents into a discharge funnel 3 (which feeds the container 1 in FIG. 2).
  • the joint preferably consists of a toothed wheel 21, which rotates when it comes into contact with the raised surface 14, upturning the receptacle 8.
  • the receptacle continues along its circular path, and when the toothed wheel 21 moves away from the raised surface 14, a spring returns the arm and receptacle to the filling position. The receptacle continues until it reaches position I as before.
  • This appliance allows a given quantity of powder to be measured out, provided that the powder has uniform grading. Compression and levelling-off help to ensure a given volume.
  • the system for causing the receptacle 8 to vibrate can consist of a vibrating plate 15 on springs 23, driven by a separate motor, or a device connected to the arm and to the plate 15, consisting of a microswitch 24 and cam 25 on the arm.
  • This unit is connected electrically to a Sinex vibrator screwed beneath the plate l5.
  • the unit shown in FIG. 2 which can be fitted to the kiln cooling outlet, comprises a jaw-breaker 30, vibrating chute 31, and continuous crusher 32, designed to produce samples with uniform grading, with a Blaine specific surface-area of approximately 3,500 sq.cm/g.
  • the continuous crusher 32 is connected to the appliance 7 to measure out a given volume of powder.
  • the appliance 7 tips a fixed volume of powder through a funnel 3 into a container 1, in which there is an electrode 6.
  • a fixed quantity of reagent is also conveyed at regular intervals from a reagent tank 35 into the container, through a funnel 2.
  • This appliance is connected to an electronic unit which emits a logical signal conveying the measurement to a computer, and is combined with a device to record the results obtained by conductimetric, pH-metric, potentiometric or other analytical techniques, and a unit to emit a second signal in the direction of a computer, which controls the kiln-regulating system to which the unit in FIG. 2 is attached.
  • This unit provides almost uninterrupted quantitative continuous analysis of the free lime content of clinker, and allows kiln-operating variables to be controlled and balanced.
  • the jaw-breaker 30 is preferably a Minemet-type crusher, preferably giving a grain-size of between and 4 mm. It is connected to a sampler (not shown here), beneath the clinker belt in the clinker unit (not shown here). The sample is 2 to 3 liters/hr for an hourly output of 60 tons of clinker.
  • the continuous crusher 32 may be a vibrating crusher, which has to be fed continuously, to ensure the required degree of fineness.
  • the vibrating chute 31 is preferably a vibrating hopper, but may be of any other type, such as an overflow device, providing a continuous supply.
  • the appliance 7 allows a fixed volume of the powder supplied by the vibrating hopper 17 to be measured out.
  • the unit formed by the appliance 7 and container 1 operates as follows.
  • the motor 10 is a reducing motor 1 revolution every 3 minutes, for instance), which drives the arm 9 so that the receptacle 8 passes beneath the jet of powder from the vibrating chute 18.
  • the receptacle is filled to its capacity of approximately 1 cc, and continues its circular movement.
  • the device formed by a cam on the arm and a microswitch on the plate causes vibration of the arm and receptacle, compressing the powder inside the receptacle uniformly, so that a uniform weight is obtained by volumetric measurement. Any excess is removed by this vibration, and the receptacle then passes under a scraper 19, which levels off the powder at the edges. Any powder remaining on the arm is removed by conventional means.
  • the joint which consists of a toothed wheel 21, comes into contact with the raised surface 14, and completes a 180 movement, causing the part 9' of the arm 9 to rotate on its longitudinal axis.
  • the arm then comes to rest in an intermediate position, and the starting signal for a new weighing cycle comes from the analysis container 1.
  • the powder is conveyed into the container 1 through the funnel 3, into which the receptacle 8 has been emptied.
  • the samples of powder may consist of l g of clinker, fed into the container every l5 minutes. Simultaneously, l00 ml of glycol are conveyed to the container from a tank 35. The solution is stirred in the container 1 by an agitator 4.
  • the temperature of the solution in the container 1 should be regulated to within 0.5 during analysis, by means of a thermometer and heating tube 5.
  • the conductimetric electrode 6 consists of a probe, the base of the protective glass casing of which is removed, to prevent cement powder from accumulating inside the electrode.
  • a thermometer (not shown here), connected to a conductimeter 33, is used to adjust results to allow for residual fluctuation in the temperature of the solution.
  • the signal from the conductimeter cell connected with the electrode 6 is sent to an electronic processing unit, which delivers a signal to an analogue computer and/or recording appliance (not shown here).
  • the appliance shown in FIG. 1 is extremely accurate, as the test results given below shown, for two different crushing operations: the weight obtained by volumetric measurement, using the appliance 7, is found to be uniform.
  • the lime content of clinker was measured by means of the unit shown in FIG. 2, with the appliance 7 set to provide 4 samples of powder hourly. Results were found to be reproducible.
  • a device for measuring out at a filling station successive samples of a powderous substance from a bulk quantity thereof and for delivering said samples at a delivery station located at a distance from said filling station comprising: a substantially horizontal arm having first and second portions, a calibrated open-ended receptacle mounted on said first portion of said arm; a rotary joint connecting said first arm portion to said second arm portion and permitting rotation of said first arm portion between a first position wherein the open end of said receptacle is upwardly directed and a second position wherein the open end of said receptacle is downwardly directed; a substantially vertical rotary shaft connected to said second portion of said horizontal arm for rotating said arm, a motor driving said vertical shaft for rotating said arm and said receptacle between said filling and delivery stations, means for biasing said first arm portion to said first position, means at said delivery station engageable with said rotary joint for rotating said first arm portion to said second position when said arm is at said delivery station, means for delivering an amount of said powderous substance from said
  • the device of claim 1 which furthermore comprises a scraper-like element arranged on the path of said receptacle between said filling station and said delivery station and adapted to level off the powderous substance in the receptacle by scraping away any excess amount of said substance which may protrude over the open end of said receptacle.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
US310367A 1972-04-25 1972-11-29 Appliance to measure out a given volume of powder Expired - Lifetime US3885716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7214569A FR2182283A5 (de) 1972-04-25 1972-04-25

Publications (1)

Publication Number Publication Date
US3885716A true US3885716A (en) 1975-05-27

Family

ID=9097455

Family Applications (1)

Application Number Title Priority Date Filing Date
US310367A Expired - Lifetime US3885716A (en) 1972-04-25 1972-11-29 Appliance to measure out a given volume of powder

Country Status (2)

Country Link
US (1) US3885716A (de)
FR (1) FR2182283A5 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317534A2 (de) * 1987-11-13 1989-05-24 David J. Chapman Materialverteiler
AU608072B2 (en) * 1987-11-13 1991-03-21 D.J.C. Electrical Engineering Pty. Ltd. Dispensing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3543758C1 (de) * 1985-12-11 1986-09-04 Stephan Dipl.-Ing. 3392 Clausthal-Zellerfeld Röthele Verfahren und Vorrichtung zur integrierenden Probenahme und in-line Probenteilung von dispersen Produkten aus Transportleitungen oder an Produktstromuebergabestellen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705092A (en) * 1952-10-02 1955-03-29 Diamond Crystal Salt Co Dispensing apparatus
US3126288A (en) * 1964-03-24 Method of dispensing particles of meat
US3331665A (en) * 1962-01-31 1967-07-18 Scientific Industries Sample dispenser for automatic chemical analyzer
US3654970A (en) * 1969-04-30 1972-04-11 Commissariat Energie Atomique Device for feeding powdered material
US3712347A (en) * 1969-08-08 1973-01-23 B Andersen Method and apparatus for filling trays

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924488A (en) * 1958-05-14 1960-02-09 Int Minerals & Chem Corp Feeding apparatus for analyzer
DE1150826B (de) * 1958-06-16 1963-06-27 Steeler Maschinenfabrik Franz Einrichtung zur Entnahme von Proben aus einem Schuettgutstrom, wie Koks, Kohle und Erz
DE1119233B (de) * 1960-06-21 1961-12-14 Maschf Augsburg Nuernberg Ag Einrichtung zur Entnahme von Proben aus einem fallenden Schuettgutstrom
DE1598681A1 (de) * 1966-09-30 1970-10-01 Konink Nl Hoogovensen Staalfab Verfahren und Vorrichtung fuer Probeentnahme zur Bestimmung der chemischen Zusammensetzung feinen Erzes vor dem Sintern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126288A (en) * 1964-03-24 Method of dispensing particles of meat
US2705092A (en) * 1952-10-02 1955-03-29 Diamond Crystal Salt Co Dispensing apparatus
US3331665A (en) * 1962-01-31 1967-07-18 Scientific Industries Sample dispenser for automatic chemical analyzer
US3654970A (en) * 1969-04-30 1972-04-11 Commissariat Energie Atomique Device for feeding powdered material
US3712347A (en) * 1969-08-08 1973-01-23 B Andersen Method and apparatus for filling trays

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317534A2 (de) * 1987-11-13 1989-05-24 David J. Chapman Materialverteiler
EP0317534A3 (de) * 1987-11-13 1990-02-07 David J. Chapman Materialverteiler
AU608072B2 (en) * 1987-11-13 1991-03-21 D.J.C. Electrical Engineering Pty. Ltd. Dispensing device

Also Published As

Publication number Publication date
FR2182283A5 (de) 1973-12-07

Similar Documents

Publication Publication Date Title
US3870465A (en) Process and device for the quantitative analysis of free lime
US4248315A (en) Weighing device and installation for volumetric analysis of a sample
KR0143227B1 (ko) 유동물질의 정량측정 장치 및 그 측정방법과 그 방법의 응용
US7284574B2 (en) Apparatus for accurate powder metering
US4881819A (en) Method and apparatus for preparing concrete mortar
US3091368A (en) Powder measuring device
CN111163858B (zh) 灰水测量
US5423216A (en) Apparatus for automatically determining bulk specific gravity of powdery product
US1398790A (en) Meter for measuring granular material
US3885716A (en) Appliance to measure out a given volume of powder
US2848008A (en) Apparatus for measuring, recording, and/or controlling the moisture content of bulk material
EP1476729A2 (de) Automatische vorrichtung zum ausgeben gemessener mengen von pulver an behälter in einem array
US3566260A (en) Method and apparatus for measuring the moisture content of a particulate material including material flow control
US3001672A (en) Method and apparatus for powder feeding
EP0606121A1 (de) Automatische Vorrichtung zur Inspektion eines staubförmigen Produktes
JPS5827851B2 (ja) 粉末状材料のための計量装置
US3643493A (en) Measuring specific surface of powders
US3681685A (en) Capacitive moisture measurement
US2800312A (en) Portable concrete batching plant
CA1144394A (en) Rotating riffler
GB1379146A (en) Appliance to measure out a given volume of powder
JPS63500333A (ja) 粉状物中の可溶性成分含有量測定方法と自動装置
JPH0743061Y2 (ja) 粉粒体供給装置
JPH08151016A (ja) 粉体秤量装置
JPH04176608A (ja) 粉粒体原料の混合装置