WO2008096113A1 - Apparatus for mixing and distributing of bulk material such as animal feedstuff or manure - Google Patents

Apparatus for mixing and distributing of bulk material such as animal feedstuff or manure Download PDF

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Publication number
WO2008096113A1
WO2008096113A1 PCT/GB2008/000388 GB2008000388W WO2008096113A1 WO 2008096113 A1 WO2008096113 A1 WO 2008096113A1 GB 2008000388 W GB2008000388 W GB 2008000388W WO 2008096113 A1 WO2008096113 A1 WO 2008096113A1
Authority
WO
WIPO (PCT)
Prior art keywords
distributor
container
volume
distribution apparatus
bulk material
Prior art date
Application number
PCT/GB2008/000388
Other languages
French (fr)
Inventor
Harry West
Original Assignee
Harry West (Prees) Limited
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 Harry West (Prees) Limited filed Critical Harry West (Prees) Limited
Publication of WO2008096113A1 publication Critical patent/WO2008096113A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • A01C3/06—Manure distributors, e.g. dung distributors
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • A01C3/06—Manure distributors, e.g. dung distributors
    • A01C3/063—Side-spreaders
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K5/00—Feeding devices for stock or game ; Feeding wagons; Feeding stacks
    • A01K5/001—Fodder distributors with mixer or shredder
    • A01K5/002—Fodder distributors with mixer or shredder with mixing or shredding element rotating on horizontal axis
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating axis
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B01F27/1921—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements comprising helical elements and paddles
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/721—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/726—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two helices with opposite pitch on the same shaft; with two helices on the same axis, driven in opposite directions or at different speeds
    • 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
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/502—Vehicle-mounted mixing devices
    • B01F33/5023—Vehicle-mounted mixing devices the vehicle being a trailer which is hand moved or coupled to self-propelling vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/75455—Discharge mechanisms characterised by the means for discharging the components from the mixer using a rotary discharge means, e.g. a screw beneath the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/005—Mixing or agitating manure, dung
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/06—Mixing of food ingredients
    • B01F2101/18—Mixing animal food ingredients
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming

Definitions

  • the present invention relates to a bulk material mixing and distribution apparatus for mixing and distribution of bulk material, in particular, although not exclusively limited to agricultural bulk material such as animal feedstuff or manure.
  • Known mixing and distribution apparatus normally comprise a trailer having a container body which received material and a rotatable shaft which is mounted on the body.
  • the body has a discharge zone and a non-discharge zone and an outlet in a discharge zone.
  • the shaft has a forward auger which on rotation urges material from the non-discharge zone into the discharge zone. The action of the auger mixing material.
  • the outlet When the outlet is open, material from the discharge zone is discharged away from the body. It is common for the mixer vehicle to be driven to different locations where the outlet is opened so as to distribute the material. However, during movement to different locations, the shaft continues to rotate and when the outlet is closed there is a tendency for material to accumulate in the discharge zone where it is not mixed and can block the outlet.
  • European Patent No.0907408 addresses that problem by providing a return helical blade auger on the shaft which acts to urge material away from the discharge zone to reduce the likelihood of material accumulating in the discharge zone.
  • a return helical blade auger on the shaft which acts to urge material away from the discharge zone to reduce the likelihood of material accumulating in the discharge zone.
  • the material is wet or sticky
  • a bulk material mixing apparatus which has a container body for receiving a bulk material with a discharge zone and a non-discharge zone.
  • a rotatably driven shaft is arranged within and extending along the body.
  • the shaft carries a forward ribbon auger and a return ribbon auger oppositely handed to the forward-driven auger.
  • the forward-driven auger urges the material from the non-discharge zone towards the discharge zone and the return ribbon auger urges the material in the opposite direction.
  • the feed-out rotor which discharges material from the discharge zone to the surroundings is isolated from the mixing process.
  • the discharge zone tended to be closed off by a door which isolated the discharge zone from the mixing zone.
  • An object of the present invention is to provide an improved mixing and distribution apparatus.
  • a bulk material mixing and distribution apparatus comprising a container, a mixer in a container and a material distributor in communication with the container for distributing material from the container, the container having walls defining two opposite outer volumes and an intermediate volume between the two opposite outer volumes, the mixer comprising an auger assembly in the container, the auger assembly comprising respective outer auger members in the respective outer volumes arranged to urge material in the container towards the intermediate volume, an intermediate auger member in the intermediate volume arranged to urge material towards at least one of the outer volumes and means in the intermediate volume to urge material towards the material distributor.
  • the material distributor is no longer isolated from the mixing process and it can contribute to the mixing process itself.
  • the intermediate auger member is arranged to urge material towards both of the outer volumes.
  • the material distributor is arranged, in a preferred embodiment, in a first configuration to return material to the container and in a second configuration, to distribute material externally of the container.
  • the material distributor preferably comprises distributor walls defining a distributor volume and a distributor rotor arranged in the distributor volume to urge material externally of the container.
  • the material distributor preferably comprises a door, which, when closed, causes the material distributor to operate in the first configuration so as to return material to the container and when open allows the material distributor to be arranged in the second configuration to distribute material externally of the container.
  • One or more of the volumes defined by the container walls is/are preferably part- cylindrical.
  • the distributor volume is preferably at least partly cylindrical.
  • the door may also be part cylindrical.
  • the door preferably opens by rotating about a notional centre point at the radius of the part cylinder.
  • the material distributor is preferably arranged adjacent to the intermediate volume.
  • the distributor volume and the interior volume preferably conjoin one with another.
  • the auger assembly preferably comprises a common drive shaft by which all auger members are driven.
  • the means for urging material towards the distributor is preferably also driven by the common drive shaft.
  • the outer auger members preferably sweep a first diameter and the intermediate auger member preferably sweeps a second, smaller diameter so that material passing from one of the outer volumes to the intermediate volume passes radially around material passing from the intermediate volume to said outer volume in an annulus.
  • the first diameter preferably sweeps substantially to the inner face of the walls defining the outer volumes.
  • the means for urging material to the distributor comprises a vane-sweeping material entering the intermediate volume.
  • the ends of the outer auger members adjacent to the intermediate volume are connected to opposite outer ends of the vane member for urging material towards the distributor.
  • the mixing and distribution apparatus preferably further comprises means for varying the rate at which material can be passed from the intermediate volume to the distributor volume.
  • the means preferably comprises an actuable ledge which, in a first configuration in use, allows less material to enter the distributor volume and, in a second configuration in use, allows more material to enter the distributor volume, Preferably the second configuration occurs when the door of the distributor volume is open,
  • the common drive shaft is preferably driven mechanically by gearing from a vehicle motor or by means of a hydraulic motor.
  • the distributor rotor is preferably driven by means of a hydraulic motor.
  • the common drive shaft and distributor rotor may be driven by the same hydraulic motor.
  • the door is open and closable by means of a hydraulic actuator.
  • the ledge is preferably movable between configurations by means of a hydraulic actuator.
  • the hydraulic actuator to open the door and the hydraulic actuator to actuate the ledge are linked, most preferably so that the door is always actuated before the ledge whether opening or closing.
  • a bulk material mixing and distribution apparatus comprising a container, a mixer in the container, the container having walls defining a mixed volume and a discharge volume, a material distributor in the discharge volume for distributing material from the container, the walls defining the discharge volume defining an opening from the discharge volume to the exterior of the container, the opening being closable by means of a door, the mixer comprising an auger assembly in the container, the discharge volume being permanently open to the mixer volume whereby material being mixed in the mixer volume can pass into and out of the discharge volume from the mixer volume.
  • Fig.l is a perspective view of a bulk material mixing and distribution apparatus in accordance with the invention
  • Fig.2 is a schematic plan view of the mixing and distribution apparatus of Fig.l
  • Fig.3 is a schematic end elevation of the mixing and distribution apparatus of Figs.1 and 2,
  • Figs.4a and 4b are both schematic views showing the actuation of the distributor door and ledge arrangement of the apparatus of Figs.1 to 3, and
  • Figs.5 is a schematic plan view of the apparatus of Figs.1 to 4 showing the flow paths of material being mixed.
  • a bulk material mixing and distribution apparatus 10 is shown.
  • the apparatus takes the form of a trailer having a chassis 12, wheels 14 and a trailer hitch 16.
  • the trailer 12 carries a container 18.
  • the container 18 comprises opposite side walls 20, 22, a front wall 24 and a rear wall 26.
  • the side, front and rear walls 20, 22, 24 and 26 define a volume 28 therewithin.
  • An auger assembly 30 is arranged in the container 18, extending longitudinally thereof.
  • the auger assembly 30 comprises a drive shaft 32 which extends from the front wall 24 to the rear wall 26 of the container 18.
  • the drive shaft 32 is rotatably mounted at rotatable mounting point 34 on the rear wall 26 and is drivably connected to a driving arrangement 36 at the front wall 24 of the container 18.
  • the drive arrangement 36 comprises a drive wheel 38 having a toothed periphery which is rotationally fixed to the drive shaft 32.
  • the drive wheel 38 is, in turn, driven by means of a chain drive 40 which, in turn, is driven by hydraulic motor 42.
  • the hydraulic motor 42 is driven by hydraulic fluid from a compressor (not shown) passed to the hydraulic motor 42 via hydraulic supply pipe 44.
  • the diameter of the output shaft of the hydraulic motor which drives the chain drive 40 is smaller than the drive wheel diameter.
  • the hydraulic drive is geared down to drive the common driveshaft 32 of the auger assembly 30.
  • the auger assembly 30 further comprises, a first outer arrangement of auger ribbons 46 which extend between support arms 48 at an outer radial position of the container adjacent the inner wall of the container as shown in Fig.3.
  • the support arms 48 extend radially of the drive shaft.
  • a similar arrangement of auger ribbons 48 is provided adjacent the rear wall of the container.
  • Those radially outer arranged auger ribbons 46 each extend for approximately one-third of the length of the entire container at opposite ends thereof, leaving approximately a third of the length of the container 18 intermediate the two outer regions.
  • the radially outer auger ribbons 48 define outer volumes 50 of the container as recited above.
  • the auger assembly 30 has intermediate auger ribbons 54 arranged on the drive shaft.
  • the intermediate auger ribbons are arranged radially inwardly relative to the outer auger ribbons 46 but are also mounted to the support arms 48.
  • vane members 56 are mounted on the outer ends of tile support arms 48.
  • the vane members 56 sweep the inner surface of the intermediate volume 52, as shown in Fig.3.
  • a material distributor 58 is arranged on the side wall 20 of the container 18.
  • the distributor 58 comprises a part cylindrical distributor wall 60 defining a part cylindrical distributor chamber 62 therein.
  • the distributor wall 60 is enclosed within an outer wall distributor casing 64.
  • a distributor rotor 66 is rotably mounted within the distributor chamber 62.
  • the distributor rotor 66 comprises a drive shaft 68 and a series of radially extending vanes 70. As shown in Fig. I, the distributor rotor drive shaft 68 is powered by a distributor hydraulic motor 72.
  • the distributor 58 also comprises a naoveable ledge arrangement 74, best shown in Figs,4a and 4b.
  • Fig.3 shows, in schematic form, the ledge arrangement 74 in its folly extended position.
  • the ledge arrangement 74 comprises a hydraulic actuator 76 mounted to the underside of the distributor casing 64.
  • a hydraulic actuator 76 comprises a cylinder 78 and piston 80.
  • a piston 80 extends through an aperture 82 in the side wall 20 of the container 18.
  • the end of the piston 80 which is arranged inside the container 18 is connected at a pivot point 84 to an articulated ledge assembly 86.
  • the articulated ledge assembly 86 comprises a first, substantially vertically extending ledge portion 88, which carries the pivot point 84 at an upper end thereof.
  • the first ledge portion 88 has a hinge 90 at the upper end thereof, to which a second, substantially horizontally extending ledge portion 92 is fixed.
  • the second, substantially horizontally extending ledge portion 92 is slidably carried by two track members 94, 96 defining a guideway 98 therebetween.
  • the piston 80 when the piston 80 is fully extended from the hydraulic actuator 76, the piston pushes the entire ledge assembly 86 inwardly of the container so that Hie first ledge portion follows the curvature of the remainder of the side wall 20.
  • the distributor 58 further comprises a door assembly 98.
  • a section of the part cylindrical distributor wall 60 is cut away to form an opening 100 and the opening 100 is closable by means of a door 102.
  • a door 102 is shown in broken lines in Fig.3 and is shown in detail in Figs.4a and 4b.
  • the door 102 comprises a part-cylindrical body which circumscribes the greater part of the circumference of the cylindrical distributor walls 60 than the aperture 100.
  • the door 102 is pivotally connected at its upper end to a door hydraulic actuator 104,
  • Fig.4a shows the door 102 in the closed position with the actuator 104 fully extended so that the door covers over the aperture 100.
  • Fig.4b shows the door in the fully retracted position.
  • the actuator 104 is fully contracted, causing the door to rotate around the distributor part cylindrical wall 60.
  • the door 102 is mounted sl ⁇ dably on part-cylindrical guide tracks 106.
  • the hydraulic actuator 76 When the door 102 is open, the hydraulic actuator 76 is operated to contract the piston 80 into the cylinder 78, which pulls the first ledge portion 88 outwardly relative to the container 18 and the second, substantially horizontal ledge portion 92 slides along the guideway 98 formed between the track members 94, 96.
  • the drive shaft 32 is driven by the hydraulic motor 42 which causes the drive shaft 32 to rotate and drives the outer auger members 46 around the container 18.
  • Bulk material to be mixed such as animal feed, manure, etc which is arranged in the outer volumes 50 is driven by the outer auger members 46 inwards to the intermediate volume 52. Meanwhile, material is driven by the inner auger members 54 in the intermediate volume 52 outwardly towards the outer volumes 50.
  • Fig.5 shows the flow of material in the container 18.
  • the material passing from the outer volumes 50 to the intermediate volume 52 forms an annulus around a core of material travelling outwardly from the intermediate volume 52 to the outer volumes 50. As shown in Fig.5, part of the material in the intermediate portion 52 is urged into the distributor 58 by means of the vanes 56.
  • the door 102 of the distributor 58 is closed, as shown in Fig.4a and the ledge assembly is arranged with a piston 80 fully extended and the first ledge portion 88 extending substantially vertically. This tends to reduce the amount of material that passes from the container 18 into the distributor 58.
  • the distributor rotor 66 is driven by the distributor hydraulic motor 72 and the vanes 70 circulate material which has been urged from the container 18 into the distributor 58, around the distributor 58 and, as the door 102 is closed, material is then urged back into the main part of the container 18.
  • the door 102 is opened by retraction of the hydraulic actuator 104 and the hydraulic actuator 76 is operated to retract the piston 80 into the cylinder 78. That pulls the first, substantially vertical ledge portion 88 flush against the wall 20 of the container 18, allowing a greater proportion of material to be urged from the container 18 into the distributor 58 by the vanes 56.
  • the rotor 66 is again driven by the hydraulic distributor motor 72 and material entering the distributor chamber 62 is propelled by the varies 70 through the aperture 100 out of the apparatus.
  • the distributor hydraulic motor 72 may drive the drive shaft 68 of the distributor rotor 66 at different rates depending upon whether the apparatus is in the mixing or distribution cycle.
  • the distributor 58 was isolated from the mixer whereas in the present arrangement the distributor 58 can contribute to the mixing of material in the container.
  • the drive shaft can be driven by other means, for example by means of an internal combustion engine or an electric motor.
  • the door and the ledge assembly could be actuated by alternative means, for example by means of a pneumatic arrangement or by means of an electrically driven actuator.
  • a mechanical linkage between the door mechanism may be envisaged whereby actuation of the door results in corresponding actuation of the ledge.
  • the door may be positionable in various positions to allow for different distribution characteristics.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Soil Sciences (AREA)
  • Birds (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

A bulk material mixing and distribution apparatus (10) comprises a container (18), an auger assembly (30) in the container and a distributor in communication with a container for distributing material from the container 18. The container has walls (20, 22, 24, 26) defining opposite outer volumes (50) and intermediate volume (52) between the opposite outer volumes. The auger assembly comprises respective outer auger members (46) in the respective outer volumes (50) arranged to urge material towards the intermediate volume (52). An intermediate auger member (54) in the intermediate volume (52) is arranged to urge material towards at least one of the outer volumes (50). A series of vanes are provided in the intermediate volume to urge material towards the material distributor (58).

Description

APPARATUS FOR MIXING AND DISTRIBUTING OF BULK MATERIAL SUCH AS ANIMAL FEEDSTUFF OR MANURE
The present invention relates to a bulk material mixing and distribution apparatus for mixing and distribution of bulk material, in particular, although not exclusively limited to agricultural bulk material such as animal feedstuff or manure.
Known mixing and distribution apparatus normally comprise a trailer having a container body which received material and a rotatable shaft which is mounted on the body. The body has a discharge zone and a non-discharge zone and an outlet in a discharge zone. The shaft has a forward auger which on rotation urges material from the non-discharge zone into the discharge zone. The action of the auger mixing material. When the outlet is open, material from the discharge zone is discharged away from the body. It is common for the mixer vehicle to be driven to different locations where the outlet is opened so as to distribute the material. However, during movement to different locations, the shaft continues to rotate and when the outlet is closed there is a tendency for material to accumulate in the discharge zone where it is not mixed and can block the outlet. European Patent No.0907408 addresses that problem by providing a return helical blade auger on the shaft which acts to urge material away from the discharge zone to reduce the likelihood of material accumulating in the discharge zone. However, in some situations, for example where the material is wet or sticky, there is a tendency for material to accumulate in the discharge zone. Furthermore, there are situations where material needs to be more thoroughly mixed.
In our earlier International application (publication number WO2004/040967), a bulk material mixing apparatus is disclosed which has a container body for receiving a bulk material with a discharge zone and a non-discharge zone. A rotatably driven shaft is arranged within and extending along the body. The shaft carries a forward ribbon auger and a return ribbon auger oppositely handed to the forward-driven auger. The forward-driven auger urges the material from the non-discharge zone towards the discharge zone and the return ribbon auger urges the material in the opposite direction. However, in that arrangement the feed-out rotor which discharges material from the discharge zone to the surroundings is isolated from the mixing process. Also, the discharge zone tended to be closed off by a door which isolated the discharge zone from the mixing zone.
An object of the present invention is to provide an improved mixing and distribution apparatus.
According to a first aspect of the invention there is provided a bulk material mixing and distribution apparatus comprising a container, a mixer in a container and a material distributor in communication with the container for distributing material from the container, the container having walls defining two opposite outer volumes and an intermediate volume between the two opposite outer volumes, the mixer comprising an auger assembly in the container, the auger assembly comprising respective outer auger members in the respective outer volumes arranged to urge material in the container towards the intermediate volume, an intermediate auger member in the intermediate volume arranged to urge material towards at least one of the outer volumes and means in the intermediate volume to urge material towards the material distributor.
Jn that way, by arranging the outer volumes on either side of the means to urge material towards the material distributor, the material distributor is no longer isolated from the mixing process and it can contribute to the mixing process itself. Preferably, the intermediate auger member is arranged to urge material towards both of the outer volumes.
The material distributor is arranged, in a preferred embodiment, in a first configuration to return material to the container and in a second configuration, to distribute material externally of the container.
The material distributor preferably comprises distributor walls defining a distributor volume and a distributor rotor arranged in the distributor volume to urge material externally of the container.
The material distributor preferably comprises a door, which, when closed, causes the material distributor to operate in the first configuration so as to return material to the container and when open allows the material distributor to be arranged in the second configuration to distribute material externally of the container.
One or more of the volumes defined by the container walls is/are preferably part- cylindrical. The distributor volume is preferably at least partly cylindrical. In that case, the door may also be part cylindrical. The door preferably opens by rotating about a notional centre point at the radius of the part cylinder.
The material distributor is preferably arranged adjacent to the intermediate volume.
The distributor volume and the interior volume preferably conjoin one with another. The auger assembly preferably comprises a common drive shaft by which all auger members are driven. The means for urging material towards the distributor is preferably also driven by the common drive shaft.
The outer auger members preferably sweep a first diameter and the intermediate auger member preferably sweeps a second, smaller diameter so that material passing from one of the outer volumes to the intermediate volume passes radially around material passing from the intermediate volume to said outer volume in an annulus.
The first diameter preferably sweeps substantially to the inner face of the walls defining the outer volumes.
The means for urging material to the distributor comprises a vane-sweeping material entering the intermediate volume. Preferably, the ends of the outer auger members adjacent to the intermediate volume are connected to opposite outer ends of the vane member for urging material towards the distributor.
The mixing and distribution apparatus preferably further comprises means for varying the rate at which material can be passed from the intermediate volume to the distributor volume.
The means preferably comprises an actuable ledge which, in a first configuration in use, allows less material to enter the distributor volume and, in a second configuration in use, allows more material to enter the distributor volume, Preferably the second configuration occurs when the door of the distributor volume is open, The common drive shaft is preferably driven mechanically by gearing from a vehicle motor or by means of a hydraulic motor. The distributor rotor is preferably driven by means of a hydraulic motor. The common drive shaft and distributor rotor may be driven by the same hydraulic motor. The door is open and closable by means of a hydraulic actuator. The ledge is preferably movable between configurations by means of a hydraulic actuator. Preferably, the hydraulic actuator to open the door and the hydraulic actuator to actuate the ledge are linked, most preferably so that the door is always actuated before the ledge whether opening or closing.
According to a second aspect of the invention there is provided a bulk material mixing and distribution apparatus comprising a container, a mixer in the container, the container having walls defining a mixed volume and a discharge volume, a material distributor in the discharge volume for distributing material from the container, the walls defining the discharge volume defining an opening from the discharge volume to the exterior of the container, the opening being closable by means of a door, the mixer comprising an auger assembly in the container, the discharge volume being permanently open to the mixer volume whereby material being mixed in the mixer volume can pass into and out of the discharge volume from the mixer volume.
The bulk material mixing and distribution apparatus will now be described in detail by way of example and with reference to the accompanying drawings, in which:-
Fig.l is a perspective view of a bulk material mixing and distribution apparatus in accordance with the invention, Fig.2 is a schematic plan view of the mixing and distribution apparatus of Fig.l,
Fig.3 is a schematic end elevation of the mixing and distribution apparatus of Figs.1 and 2,
Figs.4a and 4b are both schematic views showing the actuation of the distributor door and ledge arrangement of the apparatus of Figs.1 to 3, and
Figs.5 is a schematic plan view of the apparatus of Figs.1 to 4 showing the flow paths of material being mixed.
In Fig.l a bulk material mixing and distribution apparatus 10 is shown. The apparatus takes the form of a trailer having a chassis 12, wheels 14 and a trailer hitch 16. The trailer 12 carries a container 18. The container 18 comprises opposite side walls 20, 22, a front wall 24 and a rear wall 26. The side, front and rear walls 20, 22, 24 and 26 define a volume 28 therewithin. An auger assembly 30 is arranged in the container 18, extending longitudinally thereof. The auger assembly 30 comprises a drive shaft 32 which extends from the front wall 24 to the rear wall 26 of the container 18. The drive shaft 32 is rotatably mounted at rotatable mounting point 34 on the rear wall 26 and is drivably connected to a driving arrangement 36 at the front wall 24 of the container 18.
As shown in Fig.l, the drive arrangement 36 comprises a drive wheel 38 having a toothed periphery which is rotationally fixed to the drive shaft 32. The drive wheel 38 is, in turn, driven by means of a chain drive 40 which, in turn, is driven by hydraulic motor 42. The hydraulic motor 42 is driven by hydraulic fluid from a compressor (not shown) passed to the hydraulic motor 42 via hydraulic supply pipe 44. The diameter of the output shaft of the hydraulic motor which drives the chain drive 40 is smaller than the drive wheel diameter. Thus, the hydraulic drive is geared down to drive the common driveshaft 32 of the auger assembly 30.
The auger assembly 30 further comprises, a first outer arrangement of auger ribbons 46 which extend between support arms 48 at an outer radial position of the container adjacent the inner wall of the container as shown in Fig.3. The support arms 48 extend radially of the drive shaft.
At the opposite end of the drive shaft, adjacent the rear wall of the container, a similar arrangement of auger ribbons 48 is provided. Those radially outer arranged auger ribbons 46 each extend for approximately one-third of the length of the entire container at opposite ends thereof, leaving approximately a third of the length of the container 18 intermediate the two outer regions. The radially outer auger ribbons 48 define outer volumes 50 of the container as recited above. By virtue of the design, dimensions and orientation of the outer ribbon members 46 and the direction in which they are driven by the drive shaft 32, bulk material in the outer volumes 50 tends to be driven towards the middle part of the container defining an intermediate volume 52.
The auger assembly 30 has intermediate auger ribbons 54 arranged on the drive shaft. The intermediate auger ribbons are arranged radially inwardly relative to the outer auger ribbons 46 but are also mounted to the support arms 48. !In addition to the intermediate auger members 54, vane members 56 are mounted on the outer ends of tile support arms 48. The vane members 56 sweep the inner surface of the intermediate volume 52, as shown in Fig.3. A material distributor 58 is arranged on the side wall 20 of the container 18. The distributor 58 comprises a part cylindrical distributor wall 60 defining a part cylindrical distributor chamber 62 therein. The distributor wall 60 is enclosed within an outer wall distributor casing 64. A distributor rotor 66 is rotably mounted within the distributor chamber 62. The distributor rotor 66 comprises a drive shaft 68 and a series of radially extending vanes 70. As shown in Fig. I, the distributor rotor drive shaft 68 is powered by a distributor hydraulic motor 72.
The distributor 58 also comprises a naoveable ledge arrangement 74, best shown in Figs,4a and 4b. Fig.3 shows, in schematic form, the ledge arrangement 74 in its folly extended position.
The ledge arrangement 74 comprises a hydraulic actuator 76 mounted to the underside of the distributor casing 64. A hydraulic actuator 76 comprises a cylinder 78 and piston 80. A piston 80 extends through an aperture 82 in the side wall 20 of the container 18. The end of the piston 80 which is arranged inside the container 18 is connected at a pivot point 84 to an articulated ledge assembly 86. The articulated ledge assembly 86 comprises a first, substantially vertically extending ledge portion 88, which carries the pivot point 84 at an upper end thereof. The first ledge portion 88 has a hinge 90 at the upper end thereof, to which a second, substantially horizontally extending ledge portion 92 is fixed. The second, substantially horizontally extending ledge portion 92 is slidably carried by two track members 94, 96 defining a guideway 98 therebetween. As can be seen in Fig.4a, when the piston 80 is fully extended from the hydraulic actuator 76, the piston pushes the entire ledge assembly 86 inwardly of the container so that Hie first ledge portion follows the curvature of the remainder of the side wall 20.
The distributor 58 further comprises a door assembly 98. A section of the part cylindrical distributor wall 60 is cut away to form an opening 100 and the opening 100 is closable by means of a door 102. A door 102 is shown in broken lines in Fig.3 and is shown in detail in Figs.4a and 4b. The door 102 comprises a part-cylindrical body which circumscribes the greater part of the circumference of the cylindrical distributor walls 60 than the aperture 100. The door 102 is pivotally connected at its upper end to a door hydraulic actuator 104,
Fig.4a shows the door 102 in the closed position with the actuator 104 fully extended so that the door covers over the aperture 100. Fig.4b shows the door in the fully retracted position. In Fig.4b, the actuator 104 is fully contracted, causing the door to rotate around the distributor part cylindrical wall 60. The door 102 is mounted slϊdably on part-cylindrical guide tracks 106.
When the door 102 is open, the hydraulic actuator 76 is operated to contract the piston 80 into the cylinder 78, which pulls the first ledge portion 88 outwardly relative to the container 18 and the second, substantially horizontal ledge portion 92 slides along the guideway 98 formed between the track members 94, 96.
In operation, the drive shaft 32 is driven by the hydraulic motor 42 which causes the drive shaft 32 to rotate and drives the outer auger members 46 around the container 18. Bulk material to be mixed such as animal feed, manure, etc which is arranged in the outer volumes 50 is driven by the outer auger members 46 inwards to the intermediate volume 52. Meanwhile, material is driven by the inner auger members 54 in the intermediate volume 52 outwardly towards the outer volumes 50. Fig.5 shows the flow of material in the container 18. The material passing from the outer volumes 50 to the intermediate volume 52 forms an annulus around a core of material travelling outwardly from the intermediate volume 52 to the outer volumes 50. As shown in Fig.5, part of the material in the intermediate portion 52 is urged into the distributor 58 by means of the vanes 56. During a mixing cycle, the door 102 of the distributor 58 is closed, as shown in Fig.4a and the ledge assembly is arranged with a piston 80 fully extended and the first ledge portion 88 extending substantially vertically. This tends to reduce the amount of material that passes from the container 18 into the distributor 58. During the mixing cycle, the distributor rotor 66 is driven by the distributor hydraulic motor 72 and the vanes 70 circulate material which has been urged from the container 18 into the distributor 58, around the distributor 58 and, as the door 102 is closed, material is then urged back into the main part of the container 18.
During a distribution cycle, the door 102 is opened by retraction of the hydraulic actuator 104 and the hydraulic actuator 76 is operated to retract the piston 80 into the cylinder 78. That pulls the first, substantially vertical ledge portion 88 flush against the wall 20 of the container 18, allowing a greater proportion of material to be urged from the container 18 into the distributor 58 by the vanes 56. The rotor 66 is again driven by the hydraulic distributor motor 72 and material entering the distributor chamber 62 is propelled by the varies 70 through the aperture 100 out of the apparatus. The distributor hydraulic motor 72 may drive the drive shaft 68 of the distributor rotor 66 at different rates depending upon whether the apparatus is in the mixing or distribution cycle.
In previous mixing apparatus, the distributor 58 was isolated from the mixer whereas in the present arrangement the distributor 58 can contribute to the mixing of material in the container.
Various modifications can be made to the apparatus shown in Figs.1-5 within the scope of the invention. In particular, the drive shaft can be driven by other means, for example by means of an internal combustion engine or an electric motor. Likewise, the door and the ledge assembly could be actuated by alternative means, for example by means of a pneumatic arrangement or by means of an electrically driven actuator. A mechanical linkage between the door mechanism may be envisaged whereby actuation of the door results in corresponding actuation of the ledge. The door may be positionable in various positions to allow for different distribution characteristics.

Claims

CLAIMS:-
1. A bulk material mixing and distribution apparatus comprising a container, a mixer in a container and a material distributor in communication with the container for distributing material ftom the container, the container having walls defining two opposite outer volumes and an intermediate volume between the two opposite outer volumes, the mixer comprising an auger assembly in the container, the auger assembly comprising respective outer auger members in the respective outer volumes arranged to urge material in the container towards the intermediate volume, an intermediate auger member in the intermediate volume arranged to urge material towards at least one of the outer volumes and means in the intermediate volume to urge material towards the material distributor.
2. A bulk material mixing and distribution apparatus according to claim 1, in which the intermediate auger member is arranged to urge material towards both of the outer volumes.
3. A bulk material mixing and distribution apparatus according to claim 1 or 2, in which the distributor can be arranged in a first configuration to return material to the container and in a second configuration to distribute material externally of the container.
4. A bulk material mixing and distribution apparatus according to claim 1, 2 or 3, in which the material distributor comprises distributor walls defining a distributor volume and a distributor rotor arranged in the distributor volume to urge material externally of the container.
5. A bulk material mixing and distribution apparatus according to claim 3, in which the material distributor comprises a door, which, when closed, causes the material distributor to operate in the first configuration so as to return material to the container and when open allows the material distributor to be arranged in the second configuration to distribute material externally of the container,
6. A bulk material mixing and distribution apparatus according to any preceding claim, in which one or more of the volumes defined by the container walls is/are part-cylindrical.
7. A bulk material mixing and distribution apparatus according to claim 4, in which the distributor volume is preferably at least partly cylindrical.
8. A bulk material mixing and distribution, apparatus according to claim 7, in which the material distributor comprises a door, which, when closed, causes the material distributor to operate in the first configuration so as to return material to the container and when open allows the material distributor to be arranged in the second configuration, to distribute material externally of the container and the door is part cylindrical.
9. A bulk material mixing and distribution apparatus according to claim 8, in which the door opens by rotating about a notional centre point at the radius of the part cylinder.
10. A bulk material mixing and distribution apparatus according to any preceding claim, in which the material distributor is arranged adjacent to the intermediate volume.
11. A bulk material mixing and distribution apparatus according to claim 4, in which the distributor volume and the intermediate volume conjoin one with another.
12. A bulk material mixing and distribution apparatus according to any preceding claim, in which the auger assembly comprises a common drive shaft by which ail auger members are driven.
13. A bulk material mixing and distribution apparatus according to claim 12, in which the means for urging material towards the distributor is preferably also driven by the common drive shaft.
14. A bulk material mixing and distribution apparatus according to any preceding claims, in which the outer auger members sweep a first diameter and the intermediate auger member sweeps a second, smaller diameter so that material passing from one of the outer volumes to the intermediate volume passes radially around material passing from the intermediate volume to said outer volume in an annulus.
15. A bulk material mixing and distribution apparatus according to claim 14, in which the first diameter preferably sweeps substantially to the inner face of the walls defining the outer volumes.
16. A bulk material mixing and distribution apparatus according to any preceding claim, in which the means for urging material to the distributor comprises a vane or vanes sweeping material entering the intermediate volume.
17. A bulk material mixing and distribution apparatus according to claim 16, in which the ends of the outer auger members adjacent to the intermediate volume are connected to opposite outer ends of the vanes for urging material towards the distributor.
18. A bulk material mixing and distribution apparatus according to any preceding claim, in which the mixing and distribution apparatus further comprises means for varying the rate at which material can be passed from the intermediate volume to the distributor volume.
19. A bulk material mixing and distribution apparatus according to claim 18, in which the means comprises an actuabie ledge which, in a first configuration, in use, allows less material to enter the distributor volume and, in a second configuration in use, allows more material to enter the distributor volume.
20. A bulk material mixing and distribution apparatus according to claim 19, in which the second configuration occurs when the door of the distributor volume is open.
21. A bulk material mixing and distribution apparatus according to claim 12, in which the common drive shaft is driven by means of a hydraulic motor.
22. A bulk material mixing and distribution apparatus according to claim 4, in which the distributor rotor is driven by means of a hydraulic motor.
23. A bulk material mixing and distribution apparatus according to claim 21 and 22, in which the common drive shaft and distributor rotor are driven by the same hydraulic motor.
24. A bulk material mixing and distribution apparatus according to claim 5, in which the door is openable and closable by means of a hydraulic actuator.
25. A bulk material mixing and distribution apparatus according to claim 19, in which the ledge is movable between configurations by means of a hydraulic actuator.
26. A bulk material mixing and distribution apparatus according to claim 24 and 25, in which the hydraulic actuator to open the door and the hydraulic actuator to actuate the ledge are linked, most preferably so that the door is always actuated before the ledge whether opening or closing.
27. A bulk material mixing and distribution apparatus comprising a container, a mixer in the container, the container having walls defining a mixed volume and a discharge volume, a material distributor in the discharge volume for distributing material from the container, the walls defining the discharge volume defining an opening from the discharge volume to the exterior of the container, the opening being closable by means of a door, the mixer comprising an auger assembly in the container, the discharge volume being permanently open to the mixer volume whereby material being mixed in the mixer volume can pass into and out of the discharge volume from the mixer volume.
PCT/GB2008/000388 2007-02-06 2008-02-05 Apparatus for mixing and distributing of bulk material such as animal feedstuff or manure WO2008096113A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0702213.0 2007-02-06
GB0702213.0A GB2446378B (en) 2007-02-06 2007-02-06 Bulk material mixing and distribution apparatus

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CN105960891A (en) * 2016-07-06 2016-09-28 四川巨业环保科技有限公司 Liquid manure returning sprayer
CN106268418A (en) * 2016-08-09 2017-01-04 广西佳华医疗卫生用品有限公司 Laundry sheet serosity vortex runner mixing stirring device

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CN105960891A (en) * 2016-07-06 2016-09-28 四川巨业环保科技有限公司 Liquid manure returning sprayer
CN106268418A (en) * 2016-08-09 2017-01-04 广西佳华医疗卫生用品有限公司 Laundry sheet serosity vortex runner mixing stirring device
CN106268418B (en) * 2016-08-09 2018-12-21 绍兴顶多纺织有限公司 Laundry sheet slurries vortex runner mixing stirring device

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GB2446378B (en) 2012-03-07
GB2446378A (en) 2008-08-13
GB0702213D0 (en) 2007-03-14

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