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US3592513A - Pressure discharge containers - Google Patents

Pressure discharge containers Download PDF

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Publication number
US3592513A
US3592513A US753600A US3592513DA US3592513A US 3592513 A US3592513 A US 3592513A US 753600 A US753600 A US 753600A US 3592513D A US3592513D A US 3592513DA US 3592513 A US3592513 A US 3592513A
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US
United States
Prior art keywords
valve
opening
discharge nozzle
container body
fluid communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US753600A
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English (en)
Inventor
Ralph Murfitt
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Individual
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Individual
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Filing date
Publication date
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Publication of US3592513A publication Critical patent/US3592513A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/72—Fluidising devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/60—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using fluids, e.g. having direct contact between fluid and load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/06—Gas pressure systems operating without fluidisation of the materials
    • B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
    • B65G53/12—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas the gas flow acting directly on the materials in a reservoir

Definitions

  • ABSTRACT Means for use in discharging powder materials from containers, particularly bulk transport vehicles in which a pressure-operated valve is provided in the base of the vehicle for admitting air or other gas to the container so that the material is aerated at or adjacent the discharge outlet.
  • This invention relates to containers for transport in bulk of powdered materials.
  • the container or so-called tanlt in addition to provision for tipping it, is equipped with a blower for feeding air under pressure to a porous pad in the base, provision also being made for venting pressurized fluid or air from the interior of the tank into the discharge pipe or passage to facilitate the through flow of fluid-powder in the discharge pipe.
  • means for evacuating powder material from a container comprises the combination of a discharge outlet in the base of the container at one end or side thereof and a one-way pressure operated valve closing the end of a passage connected to a source of gas pressure and adapted, on opening under pressure. to discharge gas in sub stantially the entire area surrounding the valve.
  • a poppet valve is provided in the base of the container adjacent the discharge outlet at the end of a pipe connected to a supply of gas under pressure, opening of the valve, which normally remains closed under the influence of gravity, being by gas pressure, and the lift of the valve being small in relation to the cross-sectionalarea of the valve opening.
  • FIG. 1 is an elevation of the tipping body or container (the undercarriage being shown in dotted. lines) fitted with a discharge control means in accordance with the invention, the body being shown in its normal or travel position;
  • FIG. 2 is a sectional view on an enlarged scale showing the valve unit and FIG. 3 is an esploded view of the valve unit shown in FIG. 2;
  • FIGS. 4 ands are detail views of alternative forms of valve devices
  • FIG. 6 is an elevation of a traileetype container unit fitted with a series of discharge outlets each having discharge control means in accordance with the invention
  • FIG. 7 is a transverse section on the line VII-VII of FIG. 6, and
  • FIG. I is a detail view of the discharge control means of FIG. ,7.
  • FIG. 1 there is shown a vehicle having a container 12in the form ofacylindrlcal tanli for the powdered material, the tank having a truncated conical end portion provided with a discharge nozzle 7, which is constructed in the form of a venturi and terminates in a fitting 8 for connection thereto of a pipeline.
  • a hatch I l is provided at the top of the container I: for loading the material therein.
  • a slide or rotary plate sbutolt valve indicated at 12' by which the entry to the discharge nozzle 7 can be completely blanked off. This valve being operated to open and close by a hand control 10 from the exterior. Pressure from the interior of the cont'ainer 12 is transmitted by a pipeline 4 whose inletend opens into the upper air space of the container and which is connected at its other end through an air control valve 5 and an inlet section 6 opening into the discharge nozzle 7 upstream of the venturi throat.
  • admission of air to the bottom of the container is through an inlet opening controlled by a single poppet-type valve, indicated generally at 3, provided at the outlet of the pipe I which replaces the customary air permeable deck.
  • the valve comprises a valve housing 13 having at its upper end a fixing flange 25 by which it is attached by welds to the tank wall. At its lower end is a locating flange 25 in which are holes 24 to receive fixing screws by which. when the flanged end 22 of pipe I is secured thereto, a valve lining or body 14 is located.
  • the poppet valve comprises a valve head I9 and valve stem [8, the stem 18 being slidably carried in valve guides 17, which guides 17 are secured to the valve body 14 by spider arms [6.
  • the lift of the valve 18, Le. its maximum distance of travel, is highly critical, for which purpose its movement is limited by lock nuts 21 adjustably secured to the lower end of the valve stem.
  • the maximum lift of the valve is based upon the area of the inlet pipe and is such that the exhaust or air release area does not exceed 2.5 times the area of the gas supply inlet pipe or opening. It will be appreciated that the lift of the valve and thus the extent to which it opens should be sufficicnt tocnsure that overheating will not occur.
  • the location of the inlet and thus of the valve in relation to the discharge orifice is critical in that the minimum distance between the centerline of the valve orifice and the plane XX of the outlet cutoff plate should not be less than 3" whatever the capacity of the tank.
  • the maximum distance should not be greater than 24" in the case of a tank up to I000 cubic feet capacity and not less than 24" per I000 cubic feet of total tank capacity.
  • valve device One such form of valve device is shown in FIG. 4 wherein a number of flaps 27 are mounted for pivotal movements about a central axis 28.
  • the valve device comprises three valve flaps, the dotted lines showing the valve flaps in their open position.
  • FIG. 5 shows a multisided valve having four flaps 29 but clearly a similar arrangement embodying a number of segments having either arcuatc or straight edges may be used.
  • an additional poppet or other valve controlled inlet may be introduced to assist the discharge in other areas of the tank.
  • FIGS. 6, 7 and 8 there is shown a trailer unit comprising an undercarriage 30 mounted at its rear end on a bogey 3
  • the container is divided into a series of chambers or compartments by partition walls or baffles 33, each chamber so formed including a well 34 of inverted conical formation and terminating in inclined straight sided wall portions 35. 36.
  • the one sidewall portion 36 incorporates a discharge outlet 37 having a discharge nozzle similar to the nozzle 7 and provided with a sliding or rotatable closure plate so that the nozzle can be completely blanked off, provision being made for admitting pressure air as shown in FIGS. I and 3 to assist discharge.
  • each discharge outlet 37 Associated with each discharge outlet 37 is a one way pressure operated poppet valve 38 valve 38 being mounted in a valve seating formed in an extension of the wall 35.
  • the minimum and maximum opening movements of the valve as described above is determined by the size of the pipeline normally required to convey air from a compressor or blower, for example. when using 300 cfnr ofair it will be cal culated on a 3" pipeline. Based on a 3" pipe size, the minimum lift should be such as to give an opening area not less than 1.76 square inches and not exceeding [7.65 square inches, this measurement being the area through which free air can enter the pressure vessel.
  • valve While it is preferred to position the valve with its valve seating flush with the base of the tank, this is not essential and it may be slightly raised or slightly countersunk.
  • a valve In contrast to the effect obtainable by an incoming jet of air, the provision of a valve enables the air to be diffused over the area surrounding the valve which not only supports but aerates the material above it, ie. its first action is to support the material by a cushion of air and the material, being of a finely divided nature, then becomes aerated and can flow into the discharge orifice.
  • valve controlled inlet for the air or other fluid has the further advantage that it enables discharge to be effectively carried out at relatively lower pressures and thus horsepower requirements.
  • the valve as such is sturdy and its simplicity in design leads to further benefits in efficiency of operation and manufacturing costs and due to its simplicity it can readily be cleaned.
  • Apparatus for discharging powdery material from a container comprising a container body having a bottom wall and an end wall in upstanding relationship thereto, said end wall having an outlet opening through which powdery material is adapted to be discharged from an interior of said container body, said bottom wall having an inlet opening adjacent and upstream of said outlet opening for introducing a pressurized gaseous medium into said container body interior for aerating said powdery material, gravity actuated reciprocal poppet valve means including a valve element having a valve head by which said inlet opening normally remains closed for selectively placing said inlet opening in fluid communication with the container body interior and fluid pressure means for displacing said valve head above said bottom wall whereby powdery material above said valve head is displaced vertically in order to break down any caking that may be present and following which displacement of powdery material the material so displaced and surrounding the valve opening is aerated by the gaseous medium to enable discharge of the material through the outlet opening.
  • valve head is movable relative to a valve seat for opening and closing said inlet opening, and means for adjustably limiting the opening movement of said valve head in a direction away from said valve seat whereby the open area between said valve head and valve seat is relatively small in relationship to the area of said inle opening,
  • outlet opening is in fluid communication with a discharge nozzle disposed exteriorly of said container body, means are pro vided for introducing a pressurized fluid medium into said discharge nozzle to augment the flow of the powdery material therethrough, and additional valve means positioned between said outlet opening and said nozzle for selectively opening and closing fluid communication therebetween.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US753600A 1967-08-31 1968-08-19 Pressure discharge containers Expired - Lifetime US3592513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39907/67A GB1210225A (en) 1967-08-31 1967-08-31 Improvements in and relating to pressure discharge containers

Publications (1)

Publication Number Publication Date
US3592513A true US3592513A (en) 1971-07-13

Family

ID=10412130

Family Applications (1)

Application Number Title Priority Date Filing Date
US753600A Expired - Lifetime US3592513A (en) 1967-08-31 1968-08-19 Pressure discharge containers

Country Status (8)

Country Link
US (1) US3592513A (fr)
BE (1) BE720068A (fr)
CH (1) CH491033A (fr)
DE (2) DE1781147A1 (fr)
FR (1) FR1578631A (fr)
GB (1) GB1210225A (fr)
IE (1) IE32285B1 (fr)
NL (1) NL6812255A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070000545A1 (en) * 2005-06-29 2007-01-04 Cannon John F Viscous Product Transportation Trailer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174372B (en) * 1985-04-16 1988-12-29 Metalair Limited Discharge pot arrangement
DE10340169A1 (de) * 2003-09-01 2005-04-21 Atec Pharmatechnik Gmbh Behandlungs- und Transportbehälter

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US749206A (en) * 1904-01-12 Fuel-feeding device
US2147300A (en) * 1936-03-02 1939-02-14 Reconstruction Finance Corp Means for handling material
US2255438A (en) * 1939-06-03 1941-09-09 Evelyn G Robinson Material handling apparatus
US2684871A (en) * 1950-03-03 1954-07-27 Acf Ind Inc Transport container
US2915337A (en) * 1958-12-23 1959-12-01 Fuller Co Discharge means for storage receptacles
US3223457A (en) * 1964-01-29 1965-12-14 Albert Air Conveyor Corp Pneumatic fluidizing means
US3289396A (en) * 1963-01-14 1966-12-06 Butler Manufacturing Co Pressure equalizing and filter arrangement for pressurized storage tanks having voids therein
US3393943A (en) * 1966-06-29 1968-07-23 American Colloid Co Apparatus and methods for fluidizing granular or pulverate materials

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US749206A (en) * 1904-01-12 Fuel-feeding device
US2147300A (en) * 1936-03-02 1939-02-14 Reconstruction Finance Corp Means for handling material
US2255438A (en) * 1939-06-03 1941-09-09 Evelyn G Robinson Material handling apparatus
US2684871A (en) * 1950-03-03 1954-07-27 Acf Ind Inc Transport container
US2915337A (en) * 1958-12-23 1959-12-01 Fuller Co Discharge means for storage receptacles
US3289396A (en) * 1963-01-14 1966-12-06 Butler Manufacturing Co Pressure equalizing and filter arrangement for pressurized storage tanks having voids therein
US3223457A (en) * 1964-01-29 1965-12-14 Albert Air Conveyor Corp Pneumatic fluidizing means
US3393943A (en) * 1966-06-29 1968-07-23 American Colloid Co Apparatus and methods for fluidizing granular or pulverate materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070000545A1 (en) * 2005-06-29 2007-01-04 Cannon John F Viscous Product Transportation Trailer
US7645114B2 (en) * 2005-06-29 2010-01-12 Brenner Tank Llc Viscous product transportation trailer

Also Published As

Publication number Publication date
DE6609708U (de) 1972-08-17
FR1578631A (fr) 1969-08-14
GB1210225A (en) 1970-10-28
BE720068A (fr) 1969-02-28
NL6812255A (fr) 1969-03-04
IE32285L (en) 1969-02-28
IE32285B1 (en) 1973-06-13
CH491033A (fr) 1970-05-31
DE1781147A1 (de) 1970-10-29

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