US3463468A - Suspension means - Google Patents

Suspension means Download PDF

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Publication number
US3463468A
US3463468A US676306A US3463468DA US3463468A US 3463468 A US3463468 A US 3463468A US 676306 A US676306 A US 676306A US 3463468D A US3463468D A US 3463468DA US 3463468 A US3463468 A US 3463468A
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US
United States
Prior art keywords
end cover
lever
levers
suspension means
kiln
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
US676306A
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English (en)
Inventor
Arthur Frederick Hobbs
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.)
Humphreys and Glasgow Ltd
Original Assignee
Humphreys and Glasgow Ltd
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 Humphreys and Glasgow Ltd filed Critical Humphreys and Glasgow Ltd
Application granted granted Critical
Publication of US3463468A publication Critical patent/US3463468A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]

Definitions

  • Suspension means for a non-rotating end cover for sealing a rotary kiln comprising a pair of levers, or lever systems, two frames for mounting the levers or systems respectively, means to mount each frame for horizontal movement along parallel paths whereby each lever or system may be moved individually with its respective frame, means for pivotally attaching an end cover at spaced locations on the cover to one end of each of the levers or systems respectively, and two counterbalancing means attached to the other end of each lever or system, the arrangement of the levers or systems being such that there is a mechanic-a1 advantage in favour of the counterweights.
  • This invention relates to the construction of suspension means for rotary kilns and similar rotary devices.
  • suspension means for supporting the stationary end cover or end box which seals one end of such a kiln or device and may be provided with means for feeding materials into the kiln or for removal of a product or products from the kiln, for instance evolved gases.
  • the effective seal between such an end cover and the kiln generally takes the form of a 'spigoted joint, one section of which is formed on the end face of the kiln and the other on the end cover, which is necessarily of massive construction.
  • an end cover may have considerable weight, for instance from four to eight tons.
  • the seal may be elfective it is necessary that the height of the end cover may be adjustable within fine limits, and this setting be maintained during operation, while for other purposes, such as assembly and maintenance, larger controlled movement both vertically and longitudinally must also be possible.
  • An automatically maintained pressure between the sealing surfaces of the kiln and the end cover is also desirable. Further, where the kiln is arranged at an angle to the horizontal an end cover may be held suspended at an angle to the vertical correspondingly.
  • the invention provides suspension means for a nonrotating end cover for sealing a rotary kiln comprising a pair of levers, or lever systems, two frames for mounting the levers or systems respectively, means to mount each frame for horizontal movement along parallel paths whereby each lever or system may be moved individually with its respective frame, means for pivotally attaching an end cover at spaced locations on the cover to one end of each of the levers or systems respectively, and two counterbal-ancing means attached to the other end of each lever or system, the arrangement of the levers or systems being such that there is a mechanical advantage in favour of the counterweights.
  • the frames support means below the counterweights so that in the event of failure 3,463,468 Patented Aug. 26, 1969 of the means suspending the counterweights the distance the weights may fall is limited.
  • each frame may he means on each frame to lock or limit movement of the levers.
  • chains or the like may be connected to connect the end cover to the levers, the length of which chains may be adjustable.
  • a damping device is provided on at least one of the systems to damp any sudden downward force applied to the system (e.g. when the kiln is rotated in a direction to produce such a downward frictional force on the end cover).
  • the mounting means for the frames comprise pulleys movable along horizontal parallel rails, and there may be means to lock each frame relative to its respective rail.
  • FIGURE 1 is a side view of the suspension means
  • FIGURE 2 is an end view of the suspension means
  • FIGURE 3 is an enlarged scrap view of the locking means for the levers
  • FIGURE 4 shows an alternative suspension for the counterweights.
  • 1 represents a rotary kiln and 2 an end cover suspended at 2411 and 24b by chains 4a and 4b from compound lever systems 3a, 13a, 23a and 3b, 13b, 23b respectively.
  • the levers are pivotally mounted at 5a, 5b and 6a, 6b respectively between plate like frame members 7a, 17a and 7b, 17b.
  • the chains 4a and 4b are provided with means 8a and 8b for adjusting their length and thus the height of the end cover 2 and its orientation about its centre.
  • the two sets of frame members carry paired rollers 10a, 11a and 10b, 11b which run upon rails 12a and 12b respectively, these rails being substantially horizontal and parallel.
  • Each lever assembly may be locked in position along its rail by an anchoring device, for instance 14a attached to the plate-like member 7a.
  • FIGURE 4 An alternative method of suspending the counterweights is illustrated in FIGURE 4.
  • the flexible connection 4a of FIGURES 1 and 2 between the lever 311 at 33a and one side of the end cover 2 at 2411 is replaced by two chains 44a linked by a yoke 39a from which the connection extends downwards as a bar 45a with means 8a for shortening or lengthening the extension of the bar from the yoke.
  • the base 14a is attached to the end cover at 2412.
  • the counterweight 9a is hung by the chain 29a from the free end of the lever 23a, the point of its suspension (40a in FIGURE 1) from that lever being such that it is nearly vertically superimposed above 33a, the point of suspension of the main load (the end cover) from lever 3a.
  • the chains 44 pass through the counterweight 9a, which is suspended above the yoke 39a, and in the event of failure of the chain 29:: the counterweight can fall only as far as the yoke.
  • an enclosure 19a (shown in chained lines in FIGURE 4) may be built upon the yoke 39a.
  • the knifeedged ends 27 of the levers are released from the notched lever 15 and the levers are thus allowed freedom of movement.
  • the movement can be inspected visually at all times.
  • the notched levers 15 may be set as in FIGURE 3, to permit only limited movement of the ends 27 of the levers.
  • end cover 2. may be arranged to hang with its bearing face at a desired angle to the vertical by choice of the positions 24a and 24b on its periphery. These may be adjustable by means not shown in the figures.
  • a hydraulic damping device 20, coupled between the points 21 on the plate 70 and 22 on the lower lever 3a is arranged to restrict sudden downward movement of the lever 3a about the pivot a.
  • a suspension means according to the invention has big advantages over conventional means comprising multiple pulleys and counterweights.
  • the invention enables the position of the end cover to be adjusted and maintained within fine limits, and for assembly, maintenance and repair work to be carried out without substantial alteration of adjustments previously made.
  • the invention also has advantages from the aspect of safety.
  • Suspension means for a non-rotating end cover for sealing a rotary kiln comprising a pair of compound lever systems, two frames for mounting the lever systems respectively, means to mount each frame for horizontal movement along parallel paths whereby each lever system may be moved individually with its respective frame, means for pivotally attaching an end cover at spaced locations on the cover to one end of each of the lever systems respectively, and two counterbalancing means attached to the other end of each lever system, the arrangement of the lever systems being such that there is a mechanical advantage in favour of the counterweights.
  • Suspension means as claimed in claim 1 in which a damping device is provided on at least one of the systems to damp any sudden downward force applied to the system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
US676306A 1966-10-20 1967-10-18 Suspension means Expired - Lifetime US3463468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47062/66A GB1189666A (en) 1966-10-20 1966-10-20 Suspension Means for Non-Rotating End Covers of Rotary Kilns.

Publications (1)

Publication Number Publication Date
US3463468A true US3463468A (en) 1969-08-26

Family

ID=10443565

Family Applications (1)

Application Number Title Priority Date Filing Date
US676306A Expired - Lifetime US3463468A (en) 1966-10-20 1967-10-18 Suspension means

Country Status (4)

Country Link
US (1) US3463468A (da)
DE (1) DE1583454B1 (da)
DK (1) DK116681B (da)
GB (1) GB1189666A (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923450A (en) * 1973-06-09 1975-12-02 Kobe Steel Ltd Rotary kiln provided with seal mechanism
US4213754A (en) * 1977-09-16 1980-07-22 Smit Ovens Nijmegen B.V. System for sealing the rotary tube of a rotary tubular kiln
US6125773A (en) * 1998-07-30 2000-10-03 Coble; Gary L. Cable system for operating furnace doors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019835A (en) * 1956-07-15 1962-02-06 Lafarge Ciments Sa Rotary kilns and dryers or other like apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1895795A (en) * 1930-07-03 1933-01-31 Natural Products Refining Co Kiln

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019835A (en) * 1956-07-15 1962-02-06 Lafarge Ciments Sa Rotary kilns and dryers or other like apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923450A (en) * 1973-06-09 1975-12-02 Kobe Steel Ltd Rotary kiln provided with seal mechanism
US4213754A (en) * 1977-09-16 1980-07-22 Smit Ovens Nijmegen B.V. System for sealing the rotary tube of a rotary tubular kiln
US6125773A (en) * 1998-07-30 2000-10-03 Coble; Gary L. Cable system for operating furnace doors

Also Published As

Publication number Publication date
GB1189666A (en) 1970-04-29
DK116681B (da) 1970-02-02
DE1583454B1 (de) 1970-12-23

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