US3314661A - Apparatus for mixing - Google Patents

Apparatus for mixing Download PDF

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US3314661A
US3314661A US420537A US42053764A US3314661A US 3314661 A US3314661 A US 3314661A US 420537 A US420537 A US 420537A US 42053764 A US42053764 A US 42053764A US 3314661 A US3314661 A US 3314661A
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shaft
paddle
pump
container
mixer apparatus
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US420537A
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Franklin Henry Albert
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers

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  • the mixer apparatus of the present invention is pri marily adapted for use in an asphalt mixing unit of a type including an aggregate storage bin located to dis charge weighted quantities of aggregate into the 'mixer apparatus in conjunction with the discharge thereinto of weighted quantities of liquid asphalt.
  • an aggregate storage bin located to dis charge weighted quantities of aggregate into the 'mixer apparatus in conjunction with the discharge thereinto of weighted quantities of liquid asphalt.
  • the liquid asphalt is delivered to the mixer apparatus in the form of a spray or sprays directed into the vortex of the mass disturbed by the rotating mixer paddles.
  • the sprays are delivered under pressure induced by a pump arranged in the liquid. supply line and said pump is provided with a bypass so as to discharge air entering same when the supply of liquid asphalt to the pump is out off.
  • An object is to provide a novelly constructed mixer apparatus.
  • Another object is to provide novel means to introduce liquid asphalt to a mixer apparatus.
  • Another object is to provide novelly constructed spray nozzles.
  • Another object is to provide a mixer apparatus with novelly constructed paddles.
  • Another object is to provide apparatus of the character referred to which is not expensive to construct or assemble, and is very efiicient in use.
  • FIG. 1 is a perspective view of the mixer apparatus and associate aggregate and liquid asphalt weighing mechanism.
  • FIG. 2 is a fragmentary transverse sectional view of the mixer apparatus illustrating one of the two like paddle assemblies therein.
  • FIG. 3 is an enlarged detail sectional view of a paddle and spray nozzle assembly.
  • FIG. 4 is a detail sectional view of the liquid asphalt feed system showing, associated therewith.
  • FIG. 5 is a detail sectional view of the pump.
  • FIG. 6 is a schematic view illustrating the spray discharge into the vortex of the material mix.
  • the apparatus is generally indicated at 11 in FIG. 1.
  • This apparatus is arranged below a hopper 12 located to discharge weighted amounts of aggregate into the open top of the apparatus.
  • a liquid asphalt weighing mechanism 13 Also associated with the apparatus is a liquid asphalt weighing mechanism 13.
  • This mechanism 13 includes a liquid receiver 14 adapted, when its valve 15 is open, to discharge a measured quantity of liquid asphalt into a bucket 16 from where it is conveyed via an outlet pipe 17 to a pump 18.
  • the mixer apparatus 11 comprises an open top housschematically, a paddle assembly 19 having mounted therein a pair of paddle assemblies 21.
  • These paddle assemblies are alike and each includes a shaft 22 that extends to the outside of each end thereof.
  • the projecting shaft ends on one housing end mount gears 23 that are meshed with each other so that both shafts are rotated in opposite directions in unison when power is applied as through a sprocket 24 carried on one of said shafts.
  • Each shaft 22 mounts, within housing 19, a plurality of like radially extending paddles 25 each preferably having on its outer end a tip 26 of wear resisting material.
  • Each paddle is preferably fabricated of cast metal and each has a longitudinal bore 27 that terminates near the outer end thereof in a tapped port 28 opening onto the trailing side of the paddle. The inner end of said bore is in direct communication, through a fitting 29, with an axial bore 31 in the shaft mounting the paddle.
  • the fitting 29 is tapered so that when the paddle is secured firmly to the shaft, as by bolts 32, then there is provided a fluid tight fit between the shaft and paddle.
  • the shaft bore 31 is connected, through a swivel fitting 33 with a conduit 34 leading from pump 18.
  • conduit 34 leading from pump 18.
  • the spray nozzle 35 may comp-rise a tapered body 36 externally threaded at one end to be mounted in port 28, and having a discharge opening 37.
  • a valve element 38 is arranged within body 36 to coact with opening 37. This valve element is enclosed in a tubular housing 39 that is vented through passage 41 to the outside of body 36.
  • a stem 42 on said element extends through the end wall of housing 39 and receives threaded thereon a nut 43 adjustable to vary the effective size of the discharge opening.
  • a spring 44 retains the element 38 in adjusted position.
  • the pump 18 is fitted with a bypass 46 including a valve 47 operable to open when the measuring valve 15 is closed so as to vent air in the pump and prevent its flow into the shaft bores.
  • These valves prefer-ably are solenoid controlled so as to be operated in unison. Specifically, when the valve 15 is open the valve 47 is closed and vice versa. In operation, it is preferred that the paddle assemblies be rotated at about 25 to 100 revolutions per minute and the liquid spray be discharged under a pressure varying from 50 to pounds per square inch.
  • a mixer apparatus comprising, a container, means to deliver aggregate to said container, a pair of shafts arranged in said container, a plurality of radial paddles mounted on each shaft, said shafts and paddles having communicating passageways therein, a fluid line connected to the passageways in each shaft, a pump in said line, a spray nozzle on the trailing side of each paddle in communication with the passageway therein, and means to supply liquid asphalt to said pump for delivery into said passageways and discharge through said nozzles.
  • a mixer apparatus comprising, a container, means to deliver aggregate to said container, a shaft arranged in said container, a plurality of radial paddles mounted on said shaft, said shaft and paddles having communicating passageways therein, a fluid line connected to the passageway in said shaft, a pump in said line, a spray nozzle on the trailing side of each paddle in communication with the passageway therein, and means to supply liquid asphalt to said pump for delivery into said passageways and discharge through said nozzles.
  • a mixer apparatus comprising, a container, means to deliver aggregate to said container, a shaft arranged in said container, :a plurality of radial paddles mounted on said shaft, said shaft and paddles having communicating passageways, a fluid line connected to the shaft passagevway, a pump in said line, a spray nozzle on the trailin-g side of each paddle in communication with the paddle passageway, and means to supply liquid asphalt to said pump for delivery into said passageways and discharge through said nozzles.
  • a mixer apparatus comprising, a container, a shaft arranged in said container, a plurality of radial paddles mounted on said shaft, said shaft and paddles having communicating passageways, a fluid line connected to the shaft passageway, a spray nozzle on the trailing side of each paddle in communication with the paddle passageway, and means to supply liquid asphalt under pressure into said passageways for discharge through said nozzles.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Description

April 18, 1967 A. FRANKLIN APPARATUS FOR MIXING 2 Sheets-Sheet l INVENTOR HENRY ALB BY glean Filed Dec. 23, 1964 ERT FRANKLIN Jd mm i0.
April 18, 1967 F U 3,314,661
APPARATUS FOR MIXING Filed Dec. 25, 1964 2 Sheets-Sheet 2 INVENTOR BtiENQY ALBERT FRANKLIN United States Patent Ofiice 3,314,661 Patented Apr. 18, 1967 3,314,661 APPARATUS FOR MIXING Henry Albert Franklin, 250 S. Lincoln St., Carpentersville, Ill. 60110 Filed Dec. 23, 1964, Ser. No. 420,537 6 Claims. (Cl. 259--165) The invention relates to improvements in mixer apparatus and is more particularly concerned with the construction and assembly of a mixer of asphalt and aggregate.
The mixer apparatus of the present invention is pri marily adapted for use in an asphalt mixing unit of a type including an aggregate storage bin located to dis charge weighted quantities of aggregate into the 'mixer apparatus in conjunction with the discharge thereinto of weighted quantities of liquid asphalt. Heretofore, there has been a considera le problem of insuring proper mix of the asphalt and aggregate owing primarily to the man ner in which the liquid asphalt is delivered to the mixer apparatus. It has resulted frequently in inadequate coating of the aggregate. In the present disclosure, the liquid asphalt is delivered to the mixer apparatus in the form of a spray or sprays directed into the vortex of the mass disturbed by the rotating mixer paddles. The sprays are delivered under pressure induced by a pump arranged in the liquid. supply line and said pump is provided with a bypass so as to discharge air entering same when the supply of liquid asphalt to the pump is out off.
An object is to provide a novelly constructed mixer apparatus.
Another object is to provide novel means to introduce liquid asphalt to a mixer apparatus.
Another object is to provide novelly constructed spray nozzles.
Another object is to provide a mixer apparatus with novelly constructed paddles.
Another object is to provide apparatus of the character referred to which is not expensive to construct or assemble, and is very efiicient in use.
' The structure by means of which the above noted and other advantages of the invention are attained will be described in the following specification, taken in conjunction with the accompanying drawings, showing a preferred illustrative embodiment of the invention, in which:
FIG. 1 is a perspective view of the mixer apparatus and associate aggregate and liquid asphalt weighing mechanism.
FIG. 2 is a fragmentary transverse sectional view of the mixer apparatus illustrating one of the two like paddle assemblies therein.
FIG. 3 is an enlarged detail sectional view of a paddle and spray nozzle assembly.
FIG. 4 is a detail sectional view of the liquid asphalt feed system showing, associated therewith.
FIG. 5 is a detail sectional view of the pump.
FIG. 6 is a schematic view illustrating the spray discharge into the vortex of the material mix.
Referring to the exemplary disclosure of a mixer apparatus shown in the accompanying drawings, the apparatus is generally indicated at 11 in FIG. 1. This apparatus is arranged below a hopper 12 located to discharge weighted amounts of aggregate into the open top of the apparatus. Also associated with the apparatus is a liquid asphalt weighing mechanism 13. This mechanism 13 includes a liquid receiver 14 adapted, when its valve 15 is open, to discharge a measured quantity of liquid asphalt into a bucket 16 from where it is conveyed via an outlet pipe 17 to a pump 18.
The mixer apparatus 11 comprises an open top housschematically, a paddle assembly 19 having mounted therein a pair of paddle assemblies 21. These paddle assemblies are alike and each includes a shaft 22 that extends to the outside of each end thereof. The projecting shaft ends on one housing end mount gears 23 that are meshed with each other so that both shafts are rotated in opposite directions in unison when power is applied as through a sprocket 24 carried on one of said shafts.
Each shaft 22 mounts, within housing 19, a plurality of like radially extending paddles 25 each preferably having on its outer end a tip 26 of wear resisting material. Each paddle is preferably fabricated of cast metal and each has a longitudinal bore 27 that terminates near the outer end thereof in a tapped port 28 opening onto the trailing side of the paddle. The inner end of said bore is in direct communication, through a fitting 29, with an axial bore 31 in the shaft mounting the paddle. Preferably, the fitting 29 is tapered so that when the paddle is secured firmly to the shaft, as by bolts 32, then there is provided a fluid tight fit between the shaft and paddle.
The shaft bore 31 is connected, through a swivel fitting 33 with a conduit 34 leading from pump 18. Thus, when liquid asphalt is delivered, under pump applied pressure, into conduit 34 it is flowed into and through the axial bores in the shafts and through the paddle bores 27 to the tapped ports 28 thereof. Each port 281 is fitted with a spray nozzle 35, best shown in FIG. 3.
The spray nozzle 35 may comp-rise a tapered body 36 externally threaded at one end to be mounted in port 28, and having a discharge opening 37. A valve element 38 is arranged within body 36 to coact with opening 37. This valve element is enclosed in a tubular housing 39 that is vented through passage 41 to the outside of body 36. A stem 42 on said element extends through the end wall of housing 39 and receives threaded thereon a nut 43 adjustable to vary the effective size of the discharge opening. A spring 44 retains the element 38 in adjusted position. Thus, there is provided a regulated valve discharge for the liquid asphalt disposed to discharge its spray into the vortex 45 of the mass contained in the mixer housing 19, as illustrated in FIG. 6, and lying immediately behind each paddle. This mode of introducing the liquid asphalt into the mass insures total coating of the aggregate contained therein and greatly reduces the mixing time.
The pump 18 is fitted with a bypass 46 including a valve 47 operable to open when the measuring valve 15 is closed so as to vent air in the pump and prevent its flow into the shaft bores. These valves prefer-ably are solenoid controlled so as to be operated in unison. Specifically, when the valve 15 is open the valve 47 is closed and vice versa. In operation, it is preferred that the paddle assemblies be rotated at about 25 to 100 revolutions per minute and the liquid spray be discharged under a pressure varying from 50 to pounds per square inch.
It should be quite evident that applicant has provided a new apparatus for and novel method of delivering liquid asphalt to an aggregate-asphalt mix in a mixer apparatus and one that insures adequate coating of all aggregate quickly and efiiciently. Obviously the mixer apparatus is useful for mixing material other than that specifically referred to.
Although I have described a preferred embodiment of my invention, in considerable detail, it will be understood that the description thereof is intended to be illustrative, rather than restrictive, as many details of the structure and method disclosed may be modified or changed without departing from the spirit or scope of the invention. Accordingly, I do not desire to be restricted to the exact construction described.
ing or container I claim:
1. A mixer apparatus comprising, a container, means to deliver aggregate to said container, a pair of shafts arranged in said container, a plurality of radial paddles mounted on each shaft, said shafts and paddles having communicating passageways therein, a fluid line connected to the passageways in each shaft, a pump in said line, a spray nozzle on the trailing side of each paddle in communication with the passageway therein, and means to supply liquid asphalt to said pump for delivery into said passageways and discharge through said nozzles.
2. The mixer apparatus recited in claim 1, in which the nozzles are adjustable.
3. The mixer apparatus recited in claim 1, in which the pump has a by-pass to relieve air therein when the flow of liquid zasp hlalt to the pump is stopped.
4. A mixer apparatus comprising, a container, means to deliver aggregate to said container, a shaft arranged in said container, a plurality of radial paddles mounted on said shaft, said shaft and paddles having communicating passageways therein, a fluid line connected to the passageway in said shaft, a pump in said line, a spray nozzle on the trailing side of each paddle in communication with the passageway therein, and means to supply liquid asphalt to said pump for delivery into said passageways and discharge through said nozzles.
5. A mixer apparatus comprising, a container, means to deliver aggregate to said container, a shaft arranged in said container, :a plurality of radial paddles mounted on said shaft, said shaft and paddles having communicating passageways, a fluid line connected to the shaft passagevway, a pump in said line, a spray nozzle on the trailin-g side of each paddle in communication with the paddle passageway, and means to supply liquid asphalt to said pump for delivery into said passageways and discharge through said nozzles.
6. A mixer apparatus comprising, a container, a shaft arranged in said container, a plurality of radial paddles mounted on said shaft, said shaft and paddles having communicating passageways, a fluid line connected to the shaft passageway, a spray nozzle on the trailing side of each paddle in communication with the paddle passageway, and means to supply liquid asphalt under pressure into said passageways for discharge through said nozzles.
References Cited by the Examiner UNITED STATES PATENTS 1,137,294 4/1915 Sehroder 259-21 2,861,786 11/1958 Madsen 259-164 3,225,715 12/ 1965 Page l07-14 FOREIGN PATENTS 880,481 10/1961 Great Britain. 891,731 3/1962 Great Britain.
WALTER A. SCHEEL, Primary Examiner. R. W. JENKINS, Assistant Examiner.

Claims (1)

1. A MIXER APPARATUS COMPRISING, A CONTAINER, MEANS TO DELIVER AGGREGATE TO SAID CONTAINER, A PAIR OF SHAFTS ARRANGED IN SAID CONTAINER, A PLURALITY OF RADIAL PADDLES MOUNTED ON EACH SHAFT, SAID SHAFTS AND PADDLES HAVING COMMUNICATING PASSAGEWAYS THEREIN, A FLUID LINE CONNECTED TO THE PASSAGEWAYS IN EACH SHAFT, A PUMP IN SAID LINE, A SPRAY NOZZLE ON THE TRAILING SIDE OF EACH PADDLE
US420537A 1964-12-23 1964-12-23 Apparatus for mixing Expired - Lifetime US3314661A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677523A (en) * 1971-04-29 1972-07-18 Hartley Controls Corp Rebound pug mill
DE2113960A1 (en) * 1970-11-24 1972-09-28 Draiswerke Gmbh Method and device for the continuous mixing of substances with additional components
US4580902A (en) * 1984-07-24 1986-04-08 Dunstan & Partners Pty. Ltd Mixing plant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1137294A (en) * 1914-02-24 1915-04-27 Smidth & Co As F L Apparatus for mixing slurry.
US2861786A (en) * 1952-11-28 1958-11-25 Baldwin Lima Hamilton Corp Pug mill mixer having improved aggregate circulating means
GB880481A (en) * 1957-04-13 1961-10-25 Roland Mertens Improvements in or relating to continuous-mixing apparatus
GB891731A (en) * 1957-06-24 1962-03-21 Impact Mixing Corp Improvements in or relating to method of preparing bituminous mixes
US3225715A (en) * 1962-03-19 1965-12-28 Gen Mills Inc Apparatus for producing roll-in type doughs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1137294A (en) * 1914-02-24 1915-04-27 Smidth & Co As F L Apparatus for mixing slurry.
US2861786A (en) * 1952-11-28 1958-11-25 Baldwin Lima Hamilton Corp Pug mill mixer having improved aggregate circulating means
GB880481A (en) * 1957-04-13 1961-10-25 Roland Mertens Improvements in or relating to continuous-mixing apparatus
GB891731A (en) * 1957-06-24 1962-03-21 Impact Mixing Corp Improvements in or relating to method of preparing bituminous mixes
US3225715A (en) * 1962-03-19 1965-12-28 Gen Mills Inc Apparatus for producing roll-in type doughs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2113960A1 (en) * 1970-11-24 1972-09-28 Draiswerke Gmbh Method and device for the continuous mixing of substances with additional components
US3677523A (en) * 1971-04-29 1972-07-18 Hartley Controls Corp Rebound pug mill
US4580902A (en) * 1984-07-24 1986-04-08 Dunstan & Partners Pty. Ltd Mixing plant

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