EP0502218A1 - Apparat für die Fertigung einer Stabilisierungsmischung - Google Patents

Apparat für die Fertigung einer Stabilisierungsmischung Download PDF

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Publication number
EP0502218A1
EP0502218A1 EP90401844A EP90401844A EP0502218A1 EP 0502218 A1 EP0502218 A1 EP 0502218A1 EP 90401844 A EP90401844 A EP 90401844A EP 90401844 A EP90401844 A EP 90401844A EP 0502218 A1 EP0502218 A1 EP 0502218A1
Authority
EP
European Patent Office
Prior art keywords
stabilizing mixture
bentonite
stabilizing
discharge port
stirring
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Withdrawn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
EP90401844A
Other languages
English (en)
French (fr)
Inventor
Toshinobu c/o Toyo Denki Ind. Co. Ltd. Araoka
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.)
Toyo Denki Industrial Co Ltd
Original Assignee
Toyo Denki Industrial Co Ltd
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 Toyo Denki Industrial Co Ltd filed Critical Toyo Denki Industrial Co Ltd
Publication of EP0502218A1 publication Critical patent/EP0502218A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B01F25/211—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers the injectors being surrounded by guiding tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • 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
    • B01F27/25—Mixers with both stirrer and drive unit submerged in the material being mixed

Definitions

  • the present invention relates to an apparatus for producing stabilizing mixture in which a stabilizing mixture of uniform density used in excavation work can be produced readily in volume.
  • the excavation work is carried out while pouring into an excavated hole a stabilizing mixture in slurry form produced by mixing stabilizing powder material such as bentonite and water.
  • stabilizing mixture producing apparatuses B and C shown in Figs. 6 and 7 are known.
  • the apparatus B is composed of a density regulating tank 60 interiorly provided with a stirring pump 61 and a mud discharging pump 62, and a mud preparing tank 63 interiorly provided with a mixer 64.
  • bentonite 65 and water 66 are charged into the mud preparing tank 63, which are stirred by the mixer 64 to produce stabilizing mixture or stabilizer 67.
  • the stabilizing mixture 67 is charged into the density regulating tank 60 and stirred by the stirring pump 61, and the stabilizing mixture 67 formed into a uniform composition by said stirring can be charged into an excavated hole not shown through a mud transferring pipe 68.
  • the stabilizing mixture producing apparatus C shown in Fig. 7 will be described.
  • the apparatus C is composed of a stirring and mud preparing pump 69 which is larger than the aforementioned stirring pump 61 and a mud discharging pump 62.
  • bentonite 65 is charged into the density regulating tank 60 filled with water 66, which are stirred and prepared by the stirring and mud preparing pump 69.
  • the stabilizing mixture 67 produced into a uniform composition by said stirring and mud preparation is charged into an excavated hole not shown through the mud transferring pipe 68.
  • the present invention provides an apparatus for producing stabilizing mixture comprising a stirring water tank containing water therein, an underwater pump submerged in the water in the stirring water tank, the pump having a suction port and at least one discharge port, the suction port and the discharge ports being opened into the water in the stirring water tank, and a stabilizing material intake pipe having one end connected to a supply source for stabilizing material and the other end connected to the discharge port, whereby the stabilizing material can be sucked into the discharge port due to the negative pressure generated in the discharge port when the underwater pump is driven and vigorously mixed with water to produce a stabilizing mixture of uniform concentration.
  • the present invention has the following effects:
  • Fig. 1 is a front view in section of one embodiment of a stabilizing mixture producing apparatus according to the present invention.
  • Fig. 2 is a plan view of the apparatus shown in fig. 2.
  • Figs. 3 and 4 are a front view in section and a plan view, respectively, of another embodiment according to the invention.
  • Fig. 5 is a front view in section of a modification of the above embodiment shown in fig. 3 and 4.
  • Figs. 6 and 7 are front views in section of a conventional stabilizing mixture producing apparatus.
  • reference numeral 10 designates a stirring or agitating water tank, which is interiorly filled with water W to a fixed height H.
  • An underwater pump 12 is stood upright within the stirring water tank 10 and above the central portion of a bottom plate 11.
  • the underwater pump 12 comprises, as shown in Fig. 1, an impeller casing 13 which encases an impeller 13a rotatably therein, and a motor casing 14 arranged adjacent to said impeller casing 13 and housing therein a motor 14a connected to the impeller 13a to rotate the latter.
  • Rererence numeral 15 designates a support base on which the underwater pump 12 is placed and supported.
  • the impeller casing 13 is provided in its front central bottom portion with a suction port 16 and in its outer peripheral edge with a plurality (three in this embodiment) of discharge ports 17a, 17b and 17c, as shown in Figs. 1 and
  • trumpet-like jet nozzles 18d, 18e and 18f are mounted on the discharge ports 17a, 17b and 17c, respectively, to bring discharge openings 18a, 18b and 18c to a position away from the underwater pump 12.
  • the discharge ports 17a, 17b and 17c are used to discharge a stabilizing mixture which is a mixture of bentonite, air and water into the stirring water tank 10.
  • bentonite is used as a powdery stabilizing material.
  • the discharge direction of the discharge ports 17a, 17b and 17c extends in a tangential direction of the outer peripheral edge of the impeller 13a to provide smooth discharge and transfer of the stabilizing mixture.
  • bottom ends of a plurality of lower bentonite intake pipes 19a, 19b and 19c are communicated with and connected to base ends of the discharge ports 17a, 17b and 17c, and upper ends of the lower bentonite intake pipes 19a, 19b and 19c are communicated with and connected to a distributing tube 20.
  • an upper bentonite intake pipe 19d Communicated with and connected to the distributing tube 20 is one end of an upper bentonite intake pipe 19d, which in turn has the other end thereof inserted through a filter 23 into bentonite 22 within a bentonite container 21 as a supply source for bentonite or the like provided externally of the stirring water tank 10.
  • the upper bentonite intake pipe 19d is provided in its midst with an opening and closing valve 19e.
  • the valve 19e is opened and closed to thereby assume a bentonite mixing form suited to the conditions in the operation or construction site, that is, supplying of bentonite 22 exclusively, supplying of air exclusively, or supplying of neither bentonite 22 nor air.
  • a mud transfer pump 40 provided at its lower portion with a suction port.
  • One end of a bendable mud transfer hose 42 is connected to a discharge port 41 provided at an upper portion of the pump 40, the other end of the hose 42 being inserted or extended into a desired excavation hole.
  • an opening and closing valve 43 is provided on the hose 42.
  • valve 19e provided in the midst of the upper bentonite intake pipe 19d is opened and the valve 43 provided on the hose 42 is closed.
  • the underwater pump 12 and the mud transfer pump 40 are driven.
  • the water flown into the impeller casing 13 is discharged or jetted into the stirring water tank 10 through the discharge ports 17a, 17b and 17c and the jet nozzles 18d, 18e and 18f from the casing 13.
  • powdery bentonite 22 within the bentonite container 21 is jetted along with air into the discharge ports 17a, 17b and 17c through the bentonite intake pipe 19d, the distributing tube 20 and the lower bentonite intake pipes 19a, 19b and 19c in said order and mixed with discharging water flowing through the discharge ports 17a, 17b and 17c to produce a mixed liquid.
  • the mixed liquid is powerfully jetted into the stirring water tank 10 from the jet nozzles 18d, 18e and 18f.
  • the bentonite 22 is instantly dissolved with the discharging water and then is vigourously discharged from the jet nozzles 18d,18e and 18f in all radial directions through the discharge ports 17a, 17b and 17c and stirred throughout within the stirring water tank 10.
  • the stabilizing mixture discharged out of the discharge ports 17a, 17b and 17c is mixed with air, a powerful stirring flow can be formed within the stirring water tank 10 to further promote making of concentration of the stabilizing mixture uniform.
  • the stabilizing mixture produced in the above-described procedure is supplied rapidly and positively to the desired excavated holes or the like through the hose 42 from the discharge ports 41 of the pump 40.
  • the above-described bentonite mixing and stirring action is continuously carried out simultaneously with the aforesaid mud transferring action. Therefore, the mud transferring action can be continuously carried out while uniformly maintaining the concentration of the stabilizing mixture to enhance the efficiency of the excavation work.
  • the underwater pump 12 is merely provided with the impeller 13a, it is to be noted that an output shaft of the motor 14a with the impeller 13a may be extended downward, and a cutter may be mounted on said extended portion.
  • mixing of the bentonite 22 and water can be further promoted, particles of the bentonite 22 can be further made finer, and the stabilizing mixture can be made further uniform.
  • the present embodiment is substantially characterized by a structure which allows the underwater pump 12 to have not only the stirring function but also the mud transferring function. Parts of the same construction as those of the stabilizing mixture producing apparatus A shown in Figs. 1 and 2 are indicated by the same reference numerals.
  • a discharge port 17c of the underwater pump 12 has its extreme end bended upwardly, to which is connected a lower end of the mud transfer pipe 24.
  • One end of a bendable mud transfer hose 25 is connected to the upper end of the pipe 24, and the other end of the hose 25 is inserted into the desired excavated hole.
  • an opening and closing valve 26 is provided at the upper portion of the mud transfer pipe 24.
  • the stabilizing mixture having a uniform concentration can be produced by action, similar to the aforementioned embodiment.
  • the bentonite mixing and stirring action is carried out continuously simultaneously with the mud transferring action.
  • the mud transferring action can be continuously carried out while maintaining the concentration of the stabilizing mixture uniform to improve the efficiencey of excavating work.
  • the stabilizing mixture producing apparatus A can be manufactured inexpensively.
  • This modification is characterized in that a supply source for bentonite or the like may be residual bentonite which floats in the upper part of an excavated hole, and such floating residual bentonite can be transferred from an old excavated hole to a new excavated hole.
  • a supply source for bentonite or the like may be residual bentonite which floats in the upper part of an excavated hole, and such floating residual bentonite can be transferred from an old excavated hole to a new excavated hole.
  • reference numerals 30 and 31 designate new and old excavated holes, respectively, a foundation 33 of concrete is placed within the old excavated hole 31, and the residual or excessive bentonite 22 floats thereabove.
  • one end of the lower bentonite intake pipe 19c is inserted into the bentonite 22 within the old excavated hole 31, and one end of the mud transfer hose 25 is inserted into the new excavated hole 30.
  • the negative pressure produced by the underwater pump 12 can be utilized similarly to the aforementioned embodiments to suck the bentonite 22 from the old excavated hole 31 and the bentonite 22 can be mixed and stirred with water efficiently and uniformly within the stirring water tank 10 to produce stabilizing mixture.
  • the stabilizing mixture can be continuously supplied to the new excavated hole 30. And, the thus obtained stabilizing mixture can be coated on the inner surfaces of the new excavated hole 30 to thereby positively prevent the excavated walls from being collapsed.
  • reference numeral 32 designates a concrete charging device.
  • the bentonite 22 has been used as a powdery stabilizing material to be mixed into water
  • the stabilizing mixture producing apparatus according to the present invention can use other materials, for example, such as cement, which can be mixed with water to thereby produce a slurry.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Accessories For Mixers (AREA)
EP90401844A 1989-01-27 1990-06-27 Apparat für die Fertigung einer Stabilisierungsmischung Withdrawn EP0502218A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1019087A JP2531774B2 (ja) 1989-01-27 1989-01-27 安定液製造装置

Publications (1)

Publication Number Publication Date
EP0502218A1 true EP0502218A1 (de) 1992-09-09

Family

ID=11989674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401844A Withdrawn EP0502218A1 (de) 1989-01-27 1990-06-27 Apparat für die Fertigung einer Stabilisierungsmischung

Country Status (3)

Country Link
EP (1) EP0502218A1 (de)
JP (1) JP2531774B2 (de)
CA (1) CA2019975C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979471A (en) * 1995-04-24 1999-11-09 British Nuclear Fuels Plc Removing liquids from tanks

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139318B (de) * 1959-04-16 1962-11-08 Andreas Weiss Ruehrwerk zum Vermischen von Wasser oder Jauche mit Dung
GB2095570A (en) * 1981-03-31 1982-10-06 British Nuclear Fuels Ltd An improved apparatus for agitating the contents of storage tanks
DE3321143A1 (de) * 1983-06-10 1984-12-13 Anton 8206 Bruckmühl Humpel Vorrichtung zum aufbereiten von vorzugsweise in behaeltern befindlichen fluessigkeiten, insbesondere von guelle, sowie verteilungsvorrichtung hierfuer
DE3407370A1 (de) * 1984-02-29 1985-08-29 Kurt Leistner Vorrichtung zum einbringen von festem, fluessigem oder gasfoermigem behandlungsstoff-nahrungsstoff in wasser, abwasser
DE3417039A1 (de) * 1984-02-29 1985-11-14 Kurt Leistner Vorrichtung zum einbringen von festem, fluessigem oder gasfoermigem behandlungsstoff-nahrungsstoff in wasser, abwasser
US4645603A (en) * 1977-11-09 1987-02-24 Frankl Gerald P Liquid aeration device and method
DE3621903A1 (de) * 1986-06-30 1988-01-07 Alois Maier Ruehrwerk

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139318B (de) * 1959-04-16 1962-11-08 Andreas Weiss Ruehrwerk zum Vermischen von Wasser oder Jauche mit Dung
US4645603A (en) * 1977-11-09 1987-02-24 Frankl Gerald P Liquid aeration device and method
GB2095570A (en) * 1981-03-31 1982-10-06 British Nuclear Fuels Ltd An improved apparatus for agitating the contents of storage tanks
DE3321143A1 (de) * 1983-06-10 1984-12-13 Anton 8206 Bruckmühl Humpel Vorrichtung zum aufbereiten von vorzugsweise in behaeltern befindlichen fluessigkeiten, insbesondere von guelle, sowie verteilungsvorrichtung hierfuer
DE3407370A1 (de) * 1984-02-29 1985-08-29 Kurt Leistner Vorrichtung zum einbringen von festem, fluessigem oder gasfoermigem behandlungsstoff-nahrungsstoff in wasser, abwasser
DE3417039A1 (de) * 1984-02-29 1985-11-14 Kurt Leistner Vorrichtung zum einbringen von festem, fluessigem oder gasfoermigem behandlungsstoff-nahrungsstoff in wasser, abwasser
DE3621903A1 (de) * 1986-06-30 1988-01-07 Alois Maier Ruehrwerk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 1, no. 60, 10th June 1977, page 577 M 77; & JP-A-52 008 565 (KOSHIRO SAITO) 22-01-1977 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979471A (en) * 1995-04-24 1999-11-09 British Nuclear Fuels Plc Removing liquids from tanks

Also Published As

Publication number Publication date
CA2019975A1 (en) 1991-12-27
JP2531774B2 (ja) 1996-09-04
CA2019975C (en) 1996-07-23
JPH02200994A (ja) 1990-08-09

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