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US3135377A - Rotary lift - Google Patents

Rotary lift Download PDF

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Publication number
US3135377A
US3135377A US796883A US79688359A US3135377A US 3135377 A US3135377 A US 3135377A US 796883 A US796883 A US 796883A US 79688359 A US79688359 A US 79688359A US 3135377 A US3135377 A US 3135377A
Authority
US
United States
Prior art keywords
worm
casing
lower portion
upwardly
rotary lift
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
US796883A
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English (en)
Inventor
Miley Hunter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sonneborn Chemical and Refining Corp
Original Assignee
Sonneborn Chemical and Refining Corp
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 Sonneborn Chemical and Refining Corp filed Critical Sonneborn Chemical and Refining Corp
Priority to US796883A priority Critical patent/US3135377A/en
Priority to GB5608/60A priority patent/GB879700A/en
Priority to BE587934A priority patent/BE587934A/fr
Application granted granted Critical
Publication of US3135377A publication Critical patent/US3135377A/en
Priority to NL6615395A priority patent/NL6615395A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/34—Applications of driving gear

Definitions

  • This invention relates to a rotary lift apparatus and more. particularly to a rotary lift apparatus capable of efliciently elevating divided solid materials at higher temperatures..
  • oils such as petroleum distillates or petroleum residues, overhead cuts derived from the distillation of coal tars, or hydrocarbon oils produced synthetically by hydrogenation or by the Fischer-Tropsch process are often purified to meet market specifications.
  • they are treated in liquid phase with strong sulfuric acid to remove those constituents which are most easily reacted with the acid.
  • the reaction mass stratifies, with the treated hydrocarbon oil above and with a sludge layer below.
  • Thesludge layer contains products of the reaction between the sulfuric acid and the hydrocarbons to- 'gether with unreacted sulfuric acid..
  • Rotary lift means including a rotatable worm in a tubular casing, have been employed heretofore for recycling thehot coke used in the above-described treatment bacli thruogh the closed system.
  • an ancillary pressure feed means was usually necessary for the rotary lift means in order that the granular coke material could be forced upward by the rotating ,worm and not merely outward against the casing wall by reason of the centrifugal force.
  • Rotary lift devices generally comprise a tubular casing in which a rotatable shaft carrying a worm means is disposed.
  • the upper end of the shaft is seated or journaled in a bearing housing at the top of the casing and in devices having a closed bottom the lower end is seated in a similar bearing housing.
  • Anciliary forced feeding means are provided adjacent the lower portion of the casing for conducting material into the rotary lift and outlet means are provided adjacent the upper portion of the casing for withdrawing material raised therethrough by'the worm.
  • a variation of the above construction is a device wherein the casing bottom is open and the lower section of the casing tapers inwardly and upwardly in funnel-like fashion. correspondingly, the portion of the worm means disposed in the tapered section of the casing is also A United States Patent OT tapered.
  • an ancillary rotary plow means attached to the lower end of the shaft is provided for elfecting the forced feed into the rotary lift bottom.
  • Dispensing devices having a tapered rotatable worm in a casing provided with an open bottom havebeen used where dense. viscous masses, having'the consistency of grease or butter, are concerned.
  • the weight of the. mass itself contained in the receptacle surrounding the casing bottom effects the forced feeding into the dispenser.
  • the material being sticky Will hug the sides" of the container, thereby enabling the worm to maintain a grip'on the material.
  • the worm must necessarily be operated at relatively low speeds. At such speeds, divided solid materials are not able to hug the wall of the vertical casing by means of centrifugal force, and this type of device, therefore, has very limited industrial application, i.e, conveyance of grease-like materials in a dispenser.
  • granular materials may be efficiently conveyed upwardly upon rotation of the worm at sufiicient speed to force of the casing. No forced feed is required as the granular material acted upon by centrifugal force against the cas-v ing inner wall at the closed bottom tapered portion is upwardly. conveyed by the rotating worm moving relative thereto.
  • a particularly significant feature of the invention is the fact that no bearing is provided in the closed bottom surface of the casing for seating the lower end of the worm shaft.
  • the construction of the invention is particularly advantageous.
  • a suitably dimensioned shaft terminating at its lower end a slight distance above the casing bottom may freely expand and contract a slight" degree with changes in the temperature, a function which cannot be carried out where a' bearing is used.
  • a sliding joint such asisobtained by providing a carbon ring or sleeve sliding on a steel ring or sleeve, is used at the top end of the worm shaft which also permits expansion, yet effects a perfect seal with respect to the atmosphere at that point.
  • the worm shaft is suitably mounted for rotation solely Patented June 2, 1964 changes in heat and corresponding expansion and contraction of the metal parts on contact with the hot material to be conveyed or by reason of heat exchange means provided on the casing exterior.
  • shaft 1 is driven by any suitable means, such as a motor 2, mounted outside the rotary lift apparatus and connected to the shaft by means of shaft extension 11.
  • Shaft ll carries Worm 3 which rotates in tubular casing 4, the inside diameter of which is slightly greater than the corresponding outside diameter of worm 3.
  • Worms of this general type operate in the same manner as horizontally oriented worm conveyors, with the exception that the speed of rotation in a rotary lift device generates suflicient centrifugal force to cause a granular material to hug the inside wall of the casing. In this way, the centrifugal force operates in the same manner as gravitational force operates in a horizontally oriented worm device. As a consequence, the material is carried progressively upwardly within the casing as the worm rotates.
  • casing 4 The upper end of casing 4 is provided with a discharge outlet 5, through which material which has been carried upwardly by operation of Worm 3 may be discharged.
  • the lower end 6 of the casing 4 is provided with a gravity feed inlet '7, through which solid granular material may be supplied to the rotary lift formed by worm 3 in co action with casing 4.
  • Casing 4, inlet '7, and outlet 5 are sealedfrom the atmosphere and inlet '7 and outlet 5 may be connected to adjacent conveying conduits or receiv-v ing chambers (not shown) also sealed from the atmosphere so as to maintain the sealed condition within casing 4.
  • Worm 3 and casing 4 are of uniform diameter through out the greater upper portion of their length in the conventional manner and any material supplied to this portion will be conducted upwardly due to centrifugal force directing the material outwardly against the casing wall and the coacting upward force of the rotating worm.
  • the smaller lower portion 8 of worm 3, however, is provided with a taper 9, whereby the lower portion of the worm is of greater diameter than the upper portion.
  • Lower portion 8 of the worm tapers upwardly and inwardly to the diameter of'the upper portion.
  • the lower portion 6 of the casing wall must be formed with a greater diameter than the upper portion, to accommodate the increased diameter of the lower por-' tion 8 of the worm.
  • the lower portion 6 of the casing is, therefore, formed with a taper 10' which tapers upwardly and inwardly at approximately the same angle as that subtended by the taper 9 at the lower end 8 of Worm 3.
  • the worm will engage and lift granular material, even though supplied to inlet '7, under no positive pressure, since the bottom 12 of casing 4 seals the lower portion 8 against downward travel of the material and thereby forces said material into contact with the surrounding lower casing wall 6 and the portion of the Worm rotating thereat.
  • Shaft 1 is solely mounted for rotation by direct connection to independent drive means 2 above casing 4, the shaft extension 11 passing through the closed top end 13 of the casing at sealed sliding joint 14.
  • This joint 14 is adas a bearing for the shaft.
  • the carbon ring may be a graphite ring enclosing shaft extension 11 in tightly abutting relation for axial and rotational relative movement with respectto one another, so as to seal the parts from passage of air therebetween, the graphite serving as lubricant for the sliding joint.
  • the lower end 15 of the shaft is constructed so that there is a slight clearance with the bottom 12 of the casing.-
  • the worm and shaft therefore, are mounted for rotation outside of and independently of the casing, and freely float in a tightly sealed chamber without the use of bearings.
  • hot combustible granular materials such as oily or highly volatile coke, may be efiiciently conveyed through the rotary lift device of the invention without vantageously preferably constructed of a carbon ring or I exposure to air orlother external combustible gases.
  • pansion of the shaft and worm, heated by the hot ma terial may freely take place since a slight clearance be-- would require bearings and could only be made fluidtight or gas-tight, to theatmosphere, with great difiiculty in view of the :attendantexpansion that takes place with the exposure to 1 higher temperatures. Furthermore, it would be diflicult to jacket a bucket conveyor with hot gases or other heat transfer means, where thermal treatment is contemplated such as that involved with sulfurcontaining sludges.
  • the above mentioned dispensmg devices employing a worm in a casing having an open bottom are inapplicable for the purposes for which a rotary lift is required.
  • the worm in order for a worm enclosed in a casing to be operable as a rotary lift, the worm must travel at a peripheral speed of rotation within the rangeof from substantially 5 to 15 feet per second whereas the pitch of the worm must be within the range of from substantially 8 to 16 inches.
  • the foregoing ranges for the peripheral speed of rotation and the pitch of the worm are critical, and where the pitch andv peripheral speed of rotation are not within these ranges, rotary lift operation cannot be attained.
  • worm speeds or other pitches may be provided in a worm device for some other purpose, such devices fail as rotary lifts in view of the criticality of the related speed of rotation and pitch of the worm where rotary lifts are concerned.
  • a rotary lift must generate sufiicient centrifugal force by the speed of rotation of the worm to keep the material to be elevated outwardly disposed against the casing Wall while the pitch of the worm in cooperation therewith upwardly conveys the material.
  • a rotary lift which comprises a substantially vertically extending worm means, said worm means having a pitch within the range of from 8 to 16 inches, a tubular casing means surroundingsaid worm means, said worm means having a lower portion of increased cross-sectional size tapering inwardly and upwardly to the diameter of the upper main portionof said worm means, said casing means having a lower portion of relatively greater diameter than the upper main portion thereof enclosing said tapered lower portion of said worm-means and also tapering inwardly and upwardly at approximately the same angle as the lower portion of said worm means, the top and bottom ends of said casing means being closed, a discharge outlet means adjacent the upper end of said casing means for withdrawing material therefrom and said casing means for feeding material thereinto, the lower end of said worm means being spaced a slight distance from the closed bottom end of said casing means, and means for rotating said worm means at a peripheral speed of rotation within the range of from 5 to feet per second.
  • a rotary lift which comprises a substantially vertically extending shaft, a worm means disposed on said shaft, said worm means having a pitch of from 8 to 16 inches, a tubular casing enclosing said worm means, said worm means haying a lower portion of increasing diameter tapering inwardly and upwardly to the diameter of the upper main portion of said worm means, said casing having a lower portion of relatively larger diameter than the upper main portion thereof enclosing said tapered lower portion of said worm means and correspondingly tapering inwardly and upwardly at approximately the same angle 'as the lower portion of said worm means, the top and bottom ends of said casing being closed, a discharge outlet adjacent the upper end of said casing for withdrawing material therefrom and a gravity feed inlet adjacent the lower portion of said casing for feeding material thereinto, the lower end of said shaft and said worm means terminating a slight distance above the closed bottom of said casing, the closed top end of said casing having an opening therein defined by a carbon ring
  • a rotary lift for elevating granular material including a, substantially vertically extending worm, a tubular casing surrounding said worm, means for rotating said worm and a discharge outlet adjacent the upper end of said casing
  • said worm having a pitch of from 8 to 16 inches and a lower portion of increased diameter tapering inwardly and upwardly to the diameter of the upper main portion of said worm, said casing having a lower portion of relatively larger diameter than the upper main portion thereof enclosing said tapered lower portion of said worm and correspondingly tapering inwardly and upwardly at approximately the same angle as the lower portion of said worm, the top and bottom ends of said casing being closed, the lower end of said worm terminating a slight distance above the closed bottom of said casing, a gravity feed inlet adjacent the lower portion of said casing for feeding granular material thereinto, said means for rotating said worm including means for freely rotatably supporting said worm in said casing independently of said casing at a peripheral speed of rotation
  • a rotary lift apparatus for elevating granular material which comprises a substantially vertically extending worm having a pitch within the range of from 8 to 16 inches, a tubular casing surrounding said worm, means for independently suspending said worm in said casing and for rotating said worm at a peripheral speed of rotation within the range of from 5 to 15 feet per second, sufiicient to centrifugally force granular material to hug the inside wall of said casing, a discharge outlet adjacent the upper end of said casing and a gravity feed inlet adjacent the lower end of said casing, said worm having a lower portion of increased cross-sectional size tapering inwardly and upwardly to the diameter of the main portion of said worm, said casing having a lower portion with a closed bottom and of relatively greater diameter than the upper portion thereof enclosing said tapered lower portion of said worm and also tapering inwardly and upwardly at approximately the same angle as the lower portion of said worm, said gravity feed inlet adjacent the lower end of said casing being arranged for feeding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Screw Conveyors (AREA)
  • Furnace Charging Or Discharging (AREA)
US796883A 1959-03-03 1959-03-03 Rotary lift Expired - Lifetime US3135377A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US796883A US3135377A (en) 1959-03-03 1959-03-03 Rotary lift
GB5608/60A GB879700A (en) 1959-03-03 1960-02-17 Improvements relating to rotary lifts
BE587934A BE587934A (fr) 1959-03-03 1960-02-23 Elévateur rotatif.
NL6615395A NL6615395A (da) 1959-03-03 1966-11-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US796883A US3135377A (en) 1959-03-03 1959-03-03 Rotary lift

Publications (1)

Publication Number Publication Date
US3135377A true US3135377A (en) 1964-06-02

Family

ID=25169304

Family Applications (1)

Application Number Title Priority Date Filing Date
US796883A Expired - Lifetime US3135377A (en) 1959-03-03 1959-03-03 Rotary lift

Country Status (4)

Country Link
US (1) US3135377A (da)
BE (1) BE587934A (da)
GB (1) GB879700A (da)
NL (1) NL6615395A (da)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796747A (en) * 1986-03-14 1989-01-10 Kajiwara Kogyo Kabushiki Kaisha Foodstuff delivery machine
US20060086592A1 (en) * 2003-01-29 2006-04-27 Olds Peter J Elevating conveyor
WO2011117564A1 (en) * 2010-03-26 2011-09-29 Spaans Babcock Limited An archimedean screw apparatus
US8919534B1 (en) * 2013-07-10 2014-12-30 Wayne Edward Evans Deep basement excavation system and truck loader
US10370194B2 (en) * 2015-09-24 2019-08-06 Olds Elevator Llc Pressure sealed high temperature elevating conveyor
US10994920B2 (en) * 2015-12-24 2021-05-04 Toly Korea Inc. Container for storing and individually discharging capsules

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH27530A (de) * 1902-12-02 1904-01-31 Suhr Schouboe Jens Theodor Rücklaufmechanismus an Selbstladepistolen mit festem Lauf
US825905A (en) * 1905-12-04 1906-07-17 John C Cook Drying-machine.
US1778589A (en) * 1928-09-10 1930-10-14 Eerkes Herbert Dispensing apparatus
GB740308A (en) * 1953-06-03 1955-11-09 Niccola Andriani Improvements in or relating to worm conveyors
US2917329A (en) * 1955-05-13 1959-12-15 City Nat Bank And Trust Compan Rotary seal
US2937039A (en) * 1957-05-29 1960-05-17 Chicago Rawhide Mfg Co Controlled gap seal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH27530A (de) * 1902-12-02 1904-01-31 Suhr Schouboe Jens Theodor Rücklaufmechanismus an Selbstladepistolen mit festem Lauf
US825905A (en) * 1905-12-04 1906-07-17 John C Cook Drying-machine.
US1778589A (en) * 1928-09-10 1930-10-14 Eerkes Herbert Dispensing apparatus
GB740308A (en) * 1953-06-03 1955-11-09 Niccola Andriani Improvements in or relating to worm conveyors
US2917329A (en) * 1955-05-13 1959-12-15 City Nat Bank And Trust Compan Rotary seal
US2937039A (en) * 1957-05-29 1960-05-17 Chicago Rawhide Mfg Co Controlled gap seal

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796747A (en) * 1986-03-14 1989-01-10 Kajiwara Kogyo Kabushiki Kaisha Foodstuff delivery machine
US20060086592A1 (en) * 2003-01-29 2006-04-27 Olds Peter J Elevating conveyor
US7314131B2 (en) * 2003-01-29 2008-01-01 Olds Elevator, Llc Elevating conveyor
US20080099310A1 (en) * 2003-01-29 2008-05-01 Olds Peter J Elevating conveyor
WO2011117564A1 (en) * 2010-03-26 2011-09-29 Spaans Babcock Limited An archimedean screw apparatus
US9322278B2 (en) 2010-03-26 2016-04-26 Spaans Babcock Limited Archimedean screw apparatus
US8919534B1 (en) * 2013-07-10 2014-12-30 Wayne Edward Evans Deep basement excavation system and truck loader
US10370194B2 (en) * 2015-09-24 2019-08-06 Olds Elevator Llc Pressure sealed high temperature elevating conveyor
US10994920B2 (en) * 2015-12-24 2021-05-04 Toly Korea Inc. Container for storing and individually discharging capsules

Also Published As

Publication number Publication date
BE587934A (fr) 1960-06-16
GB879700A (en) 1961-10-11
NL6615395A (da) 1967-01-25

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