US3713626A - Mixing apparatus for pulverulent or granular material and improved method for mixing such material - Google Patents

Mixing apparatus for pulverulent or granular material and improved method for mixing such material Download PDF

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Publication number
US3713626A
US3713626A US00198253A US3713626DA US3713626A US 3713626 A US3713626 A US 3713626A US 00198253 A US00198253 A US 00198253A US 3713626D A US3713626D A US 3713626DA US 3713626 A US3713626 A US 3713626A
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United States
Prior art keywords
material components
storage compartments
compartment
components
ring
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US00198253A
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English (en)
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A Weber
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WEBER A AG
WEBER A AG CH
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WEBER A AG
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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
    • B01F23/60—Mixing solids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes

Definitions

  • Each of the storage compartments is filled with the material components which are to be admixed.
  • the filled material components are withdrawn from the storage compartments into a collecting zone in a ratio corresponding to the desired mixing ratio of such material components.
  • Means serve to generate a negative pressure condition at the region of the collected material components withdrawn from said storage compartments, by means of which there is produced a material conveying fluid medium stream over the surface of the collected material components to remove therefrom the components of the collected material in a ratio corresponding to the desired mixing ratio.
  • the thus withdrawn material components to are then transported by the conveying fluid medium stream to a consumer while admixing such material components with one another during movement to such consumer.
  • the present invention relates to a new and improved mixing apparatus for pulverulent or granular material and also concerns a new and improved method for the admixing of such materials.
  • a primary object of the present invention is to provide a novel mixing apparatus for pulverulent or granular material which is not associated with the aforementioned drawbacks and limitations and effectively and reliably fulfills the existing need in the art.
  • Still a further significant object of the present invention relates to a novel apparatus for the admixing of pulverulent or granularmaterials in an extremely efficient and economical manner while avoiding any separation of the components.
  • Yet a further significant object of the present invention relates to the provision of a novel construction of mixing apparatus for pulverulent or granular materials wherein the components of the mixture are reliably admixed in a desired ratio without any danger of reseparation of the material components.
  • a further significant object of the present invention relates to a novel method of admixing together pulverulent or granular materials in an extremely efficient and reliable fashion, while safeguarding against reseparation of the admixed components.
  • the inventive mixing apparatus for fluent materials is manifested by the features that the mixing apparatus incorporates an essentially horizontally extending annular or ring-shaped compartment which possesses a cross-sectional configuration which tapers or narrows in the fall direction of the material and merges with an annular or ringshaped gap.
  • the ring-shaped compartment is sub-divided in the peripheral direction thereof into at least two storage chambers or compartments.
  • a collecting compartment is arranged beneath the ring-shaped compartment and is in flow communication with both storage compartments via the ring-shaped gap.
  • a mixed material conduit which is arranged to ascend out of the collecting compartment and there is also provided a ring-shaped inlet opening for a carrier or transport medium which is disposed within and at the neighborhood of the ring-shaped gap.
  • a further aspect of this invention is concerned with a novel method of mixing pulverulent or granular materials in a manner preventing separation of the material components.
  • a container for the different material components is selectively sub-divided into separate storage compartments for the individual materials to be admixed, the volume of these storage compartments corresponding to the mixing ratio of the materials.
  • the materials to be admixed are then introduced into the storage compartments and permitted to flow into a collecting zone in a ratio corresponding to the desired mixing ratio for the material components.
  • There is then generated a negative pressure at the region of the collecting zone which produces a carrier or transport medium, preferably from the surrounding atmosphere, which then is drawn over the surface of the material components which are in the collecting zone.
  • This transport medium serves to entrainably remove from the collecting compartment individual material components in a ratio corresponding to the desired mixing ratio.
  • the transport medium then conveys the material components towards a consumer or load and on its way to this consumer the turbulent action of the conveying or transport air serves to finally admix the components in the desired mixing ratio with one another.
  • the admixing of both material components only then takes place when such are acted upon by the conveying or transport medium which ensures for the delivery of the material components to the consumer through the agency of the mixed material conduit.
  • the transfer of the components in a certain mixing ratio to the transport medium occurs in that, in accordance with the cross-section of the ring-shaped gap sections associated with the storage compartments a proportionate quantity of each of the material components is continuously permitted to flow into the collecting zone or compartment.
  • the conveying action through the ring-shaped gap preferably also occurs under the action of the negative pressure which prevails at the neighboring collecting compartment. This negative pressure is present owing to the fact that the mixed material conduit is connected at the side of the consumer to a negative pressure source.
  • FIG. 1 is a schematic axial sectional view of a preferred embodiment of inventive mixing apparatus.
  • FIG. 2 is a plan view of the mixing apparatus depicted in FIG. 1.
  • the exemplary inventive embodiment of mixing apparatus for the admixing of fluent, especially pulverulent or granular materials will be seen to comprise a rotationally symmetrical vessel or container 2 possessing an upstanding or vertical axis.
  • This container 2 will be seen to downwardly taper or converge in a cone-shaped vessel configuration and is bounded by an outer or external wall 4.
  • the container 2 is in the form of an inverted cone, the jacket surface of which is defined by the external wall 4.
  • the upper end i.e., the base of the cone-shaped container or vessel 2 is open and the lower end or apex of this cone-shaped container 2 is closed by the external or outer wall 4.
  • Container 2 is supported upon, for instance, three supporting legs or supports 34 which are connected in any suitable manner with the outer wall 4 thereof.
  • a body member or cylinder 24 is situated coaxially with respect to the vertical axis of the container or vessel 2 as well as a tube 16 arranged coaxially within the cylinder 24 serves to subdivide the internal compartment of the container 2 into an annular or ringshaped compartment 6 and an air chute or shaft 30.
  • the ring-shaped compartment 6 is bounded by the outside surface or wall of the cylinder 24 and the outer wall 4, while the inner surface of the cylinder 24 and the outer surface of the tube or pipe 16 delimit the air shaft or chute 30.
  • the tube 16 is a component of a mixed material conduit arrangement 18. Such is connected through the agency of a suitable consumer or load 26 with the suction side of a conventional blower or ventilator 28.
  • the tube 16 and the cylinder 24 are attached through the agency of four radially extending struts 36 with the outer wall 4 of the container 2, these struts 36 being arranged approximately at the height of the upper edge of such container.
  • An annular or ring-shaped. gap 8 formed between the lower edge of the cylinder body or cylinder 24 and the outer wall 4, operatively communicates the annular or ring-shaped compartment 6 with the lower end of the, air shaft 30 as well as with a col lecting compartment 14 disposed beneath such air shaft.
  • the inlet opening for the conveying or transport medium is designated by reference character 32, this conveying medium departing'from the air shaft 30 substantially at the height of the ring-shaped gap 8 and at that location entering the collecting compartment 14.
  • the inlet opening 32 possesses a substantially ringshaped configuration and is defined by the lower end of the cylinder 24 and the tube 16.
  • annular or ringshaped compartment 6 is sub-divided into plural storage compartments, here two storage compartments or chambers 10 and 12 by means of two radially extending partition or separation walls 20 and 22.
  • One of the partition walls, such as the partition wall 22 is displaceably mounted by means of a carriage arrangement 40 at the cylinder 24 for movement in the circumferential or peripheral direction, this carriage 40 operably engaging the upper and lower edges of cylinder 24 to permit such circumferential displacement of the movable partition wall 22.
  • Mechanism is also provided for fixing the movable partition wall 22 in its desired circumferential position with respect to the other partition wall 20, and such mechanism may comprise, for instance, a suitable fixing or clamping screw 46, best seen by referring to FIG. 2, which serves to block the carriage 40 and thus the partition wall 22 in desired position.
  • a transmission rod 44 is rigidly connected to the upper edge of the body member or cylinder 24.
  • Rod 44 is operatively connected with a suitable vibrator 50 attached to the outer wall 4 of the vessel or container 2, as shown.
  • Vibrator 50 can be driven in any suitable manner, such as electrically or pneumatically, and is connected through the agency of a line or conduit 48 with any suitable energy source.
  • Elastic sealing lips or members 38 are carried at the edges of the partition walls 20 and 22 confronting the outer wall 4 of the container or vessel 2.
  • the struts 36 are not rigidly connected with the cylinder or body member 24, rather the cylinder 24 is preferably provided with elastic bearing or support elements 42 which are secured to its wall and which undertake the support of the cylinder 24 at the struts 36.
  • the partition wall 22 is positionally adjusted with respect to the other partition wall 20 prior to the time that the apparatus is placed into operation such that the volume ratio of the storage compartments l0 and 12 correspond to the desired or predetermined mixing ratio of the materials. Thereafter, the storage compartments l0 and 12 are filled with the corresponding material components to be admixed, and in so doing material flows out of both storage compartments l0 and 12 through the ringshaped gap 8 into the collecting compartment or chamber 14.
  • material flows out of the storage compartments l0 and 12 in the form of sections of the material components corresponding to both of the storage compartments l0 and 12 and flows into the collecting compartment 14 and the latter, while having formed thereat an inverted or negative pouring cone of material fills up to such an extent that without removing material from the collecting compartment 14 no further material can flow out of each of both of the storage compartments 10 and 12. Since both material components are simultaneously filled into the corresponding storage compartments 10 and 12 these material compartments are also present in the collecting compartment 14 in a proportion by volume which corresponds to the desired mixing ratio. No appreciable mixing of the components occurs in the collecting compartment 14 prior to removal therefrom. After the collecting compartment 14 has filled while forming the previously mentioned pour cone 54 both of the storage compartments l0 and 12 can be completely filled.
  • the fill of material in the storage compartment 12 has been depicted at the left side of FIG. 1 and indicated by reference character 52.
  • the ratio of the cross-section of the sections of the ring-shaped gap 8 associated with both storage compartments l0 and 12 corresponds to the volume ratio of both storage compartments l0 and 12 and therefore to the mixing ratio of both components of the materials to be admixed, and owing to the rotationally symmetrical construction and arrangement of the collecting compartment 14 with respect to the ring-shaped gap 8, the quantity of material components located in such collecting compartment 14 are present in a ratio corresponding to the desired mixing ratio.
  • these material component quantities also are present in a proportion at the surface of the pour cone 54 which corresponds to the desired mixing ratio, and it will be recalled that the surface of the pour or filling cone 54 is subjected to the annular or ring-shaped air current flowing-in through the inlet opening 32. Consequently, this air current, during its entry into the mixed material conduit 16, likewise entrains a respective quantity of both material components which are always present in a certain predetermined and desired mixing ratio with regard to one another. Owing to the turbulence which prevails at the conveying or transport air stream these material components sufficiently admix with one another on their way to the consumer or load 26.
  • the after-filling of the materials to be mixed into both storage compartments and 12 can be controlled periodically or, if desired, as a function of the requirements of the consumer 26. Naturally, during operation a certain minimum filling level should be maintained in the storage compartments.
  • the vibrator 50 can also be placed into operation. Vibrator 50 then produces vibrations at the cylinder or body member 24. In this way there is facilitated passage of material through the annular or ring-shaped gap and the further flow of material out of the storage compartments is accelerated.
  • a method of admixing at least two fluent material components, especially pulverulent or granular materials comprising the steps of sub-dividing the internal compartment of a material receiving container into at least two storage compartments having a volume ratio essentially corresponding to the desired mixing ratio of the material components, filling into each one of the storage compartments one of the material components which are to be admixed, withdrawing from the storage compartments the therein filled material components in a ratio corresponding to the desired mixing ratio of such material components and depositing such withdrawn materials at a collecting zone, generating a negative pressure condition at the region of the collected material components withdrawn from said storage, compartments, producing by means of such negative pressure condition a material conveying fluid medium stream over the surface of the collected material components to remove the components of the collected material in a ratio corresponding to the desired mixing ratio, and then transporting the thus withdrawn material components to a consumer while admixing such material components with one another during movement to such consumer.
  • a mixing apparatus for the admixing of fluent materials, especially pulverulent or granular materials comprising a container for the materials having an internal material receiving compartment, means for forming at said internal compartment of said container a substantially horizontally extending ring-shaped compartment which possesses a tapered cross-sectional configuration in the fall direction of the material and opens into a substantially ring-shaped gap, means for sub-dividing said ring-shaped compartment in its peripheral direction into at least two storage compartments, a material collecting compartment arranged beneath said ring-shaped compartment and communicating via said ring-shaped gap with both of said storage compartments, a mixed material conduit disposed to ascend out of said collecting compartment, and a substantially ring-shaped inlet opening for a material conveying medium disposed inwardly of said ring-shaped gap in the neighborhood thereof.
  • said container comprises a substantially rotationally symmetrical vessel having a vertically extending axis, said rotationally symmetrical vessel possessing an external wall which tapers downwardly, said external wall of said vessel forming at least a part of said ring-shaped compartment as well as the bottom of said collecting compartment.
  • said mixed material conduit comprises a tube arranged internally of said body member and together with said body member delimits said inlet opening for the conveying medium.
  • said means for sub-dividing said ring-shaped compartment into at least two storage compartments comprises at least one pair of partition walls, and means for selectively displacing at least one of said partition walls in the peripheral direction.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US00198253A 1970-11-17 1971-11-12 Mixing apparatus for pulverulent or granular material and improved method for mixing such material Expired - Lifetime US3713626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1700170A CH521159A (de) 1970-11-17 1970-11-17 Mischvorrichtung für pulverförmiges oder körniges Gut

Publications (1)

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US3713626A true US3713626A (en) 1973-01-30

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US00198253A Expired - Lifetime US3713626A (en) 1970-11-17 1971-11-12 Mixing apparatus for pulverulent or granular material and improved method for mixing such material

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US (1) US3713626A (enExample)
CH (1) CH521159A (enExample)
DE (1) DE2156791A1 (enExample)
FR (1) FR2114602A5 (enExample)
GB (1) GB1362408A (enExample)
ZA (1) ZA717733B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123175A (en) * 1977-07-27 1978-10-31 Carlson C Burton Powder handling system
CN114100415A (zh) * 2021-09-30 2022-03-01 四川省蓥安爆破工程有限公司 一种现场混装炸药装药车的混料装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949791A1 (de) * 1979-12-11 1981-06-19 Krupp Polysius Ag, 4720 Beckum Vorrats- und mischsilo fuer schuettgut
RU2397013C1 (ru) * 2009-04-27 2010-08-20 Государственное образовательное учреждение высшего профессионального образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) Устройство для вибрационного смешивания порошкообразных материалов

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123175A (en) * 1977-07-27 1978-10-31 Carlson C Burton Powder handling system
CN114100415A (zh) * 2021-09-30 2022-03-01 四川省蓥安爆破工程有限公司 一种现场混装炸药装药车的混料装置
CN114100415B (zh) * 2021-09-30 2023-10-31 四川省蓥安爆破工程有限公司 一种现场混装炸药装药车的混料装置

Also Published As

Publication number Publication date
ZA717733B (en) 1972-08-30
CH521159A (de) 1972-04-15
FR2114602A5 (enExample) 1972-06-30
DE2156791A1 (de) 1972-05-18
GB1362408A (en) 1974-08-07

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