USRE37062E1 - Coal loading system and method - Google Patents
Coal loading system and method Download PDFInfo
- Publication number
- USRE37062E1 USRE37062E1 US09/453,839 US45383999A USRE37062E US RE37062 E1 USRE37062 E1 US RE37062E1 US 45383999 A US45383999 A US 45383999A US RE37062 E USRE37062 E US RE37062E
- Authority
- US
- United States
- Prior art keywords
- bin
- weight
- car
- topping
- discharging
- 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
Links
- 238000011068 loading method Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000003245 coal Substances 0.000 title description 13
- 239000000463 material Substances 0.000 claims abstract description 62
- 238000007600 charging Methods 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 29
- 239000011236 particulate material Substances 0.000 claims abstract description 6
- 230000000750 progressive effect Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 2
- 238000005303 weighing Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
- G01G13/04—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight
- G01G13/06—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight wherein the main feed is effected by gravity from a hopper or chute
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
- G01G13/022—Material feeding devices
- G01G13/024—Material feeding devices by gravity
Definitions
- This invention concerns coal loading or batching apparatus and method for loading moving railroad cars with precise weights of coal, e.g., maximum car weight capacity, from large silos substantially positioned above railroad tracks, and particularly concerns such apparatus and method in the forms required for adapting existing coal silos and car loading sites to accommodate larger capacity cars and their maximum load capacities while providing markedly improved loading weight monitoring and regulation.
- precise weights of coal e.g., maximum car weight capacity
- Such multiple charging and discharging operations in order to be commercially efficient, must be done at a rate which can accommodate a railcar moving, e.g., about one mile/hr. Due to the necessity for such double operations for each car, adequate time may not be available for some loading sites and their available equipment for precisely preloading both bins such that a target weight, of e.g., 120 tons can be accurately achieved. Consequently, the present unique structures and operations which have been designed for two bins under each silo, employ bins of similar construction but which have different but complimentary functions and are differently operated, whereby a high target weight loading accuracy is achieved due to the fact that one of the bins is adapted to make full bin capacity discharges, while the other bin is adapted to make precise, topping weight discharges.
- Principal objects therefore, of the present invention are to provide the loading means and method for its operation whereby maximum size railroad coal cars can be filled to a desired target weight within close weight tolerances, e.g., less than about 0.5% deviation from the target weight, wherein overrunning of the coal discharge into the cars and other spillage are essentially avoided; and to provide such loading means in a structural form which is readily adapted to compliment existing undersized or highly restricted, e.g., low headroom silo loading sites.
- FIG. 1 is a side elevational view of a typical coal silo and railroad track and car arrangement wherein the car is shown in doted outline and two weigh bins are employed in accordance with the present invention and wherein the height of the silo discharge ports are at a fixed limited distance above the tracks;
- FIG. 2 is a plan view taken along line 2 — 2 of FIG. 1 in the direction of the arrows and showing the present for multiple silos in accordance with the present invention
- FIG. 3 is a plan view of a weigh bin discharge gate means in closed position and provided with four independently operable hydraulically or air actuated gates for making a precision discharge;
- FIG. 5 is a top plan view of a large charging gate means with two gates shown in open position and actuable by hydraulic cylinders;
- FIG. 6 is a side elevation view taken in the direction of line 6 in FIG. 5;
- FIG. 7 is a top plan view of a vertically adjustable loadout chute having laterally operable power means for quickly moving the chute out of the way of a moving car;
- FIG. 8 is a side elevation view taken in the direction of line 8 in FIG. 7;
- FIG. 9 is a partially cross-sectioned view of a weigh bin weighing loadcell and its mounting to a silo;
- FIG. 10 is a top plan view of a weigh bin
- FIG. 11 is a side elevation view of the bin of FIG. 10 taken in the direction of line 11 in FIG. 10;
- FIG. 12 is a side elevation view of the bin of FIG. 11 taken in the direction of line 12 in FIG. 11;
- FIG. 13 is a schematic, partially cross-sectional of the general arrangement of the present loading system as viewed from the rear of a car with the first bin means in its first discharge mode;
- FIG. 14 is a cross-sectional view of a useful construction for the mounting of the charging or discharge gates, or the loading chute retractor of the present invention.
- FIG. 15 is a partial view as in FIG. 14 of a variation of the mounting construction.
- the present loading method markedly increases the loading rates for precision loading a predetermined target weight of bulk particulate material 10 into a moving car 12 of a series of moving, connected, open top railroad cars progressively from front 14 to rear 16 thereof from a material loading unit generally designated 18 having silo means 20 and associated first 22 and second 24 weigh bin means supported above the railroad tracks 26 , each said bin means being independently supported under said silo means and spaced apart from the other along said tracks a distance “d” which is considerably less than the length “L” of said car, wherein space limitations such as height “h” under said silo means 20 require that the combined weight capacities of both said bin means be less than said target weight, wherein said silo means 20 has first 28 and second 30 bin charging gate means, wherein said bin means 22 , 24 have first and second car loading discharge gate means 32 , 34 respectively and wherein said car is moving in the direction of arrow 36 which
- the first bin 22 will take and discharge two batches into each rail car. It is important that the batches be made and dumped as fast as possible and weighed to a static accuracy of at least about 0.1%. I have therefore elected to use a 7′-0 square first weigh bin charging gate 28 and discharge gate 32 , and also with a 7′-0 square telescopic loading chute 38 . I have also decided to use only one set point. The initial set point for the charging gate will be about 10 tons prior to target weight and the set point for closing the discharge gate will be about 100 lbs. above zero.
- the second bin 24 wherein it is to be precisely loaded, is equipped with a 5′-0 square double blade charging gate 30 and a 6′-0 square double blade discharge gate 34 and telescopic loading chute 40 of the same dimensions.
- the 6′-0 square discharge chute is preferred to allow coal to be heaped into the car.
- Batching accuracy typically will be affected by the variability of the coal moisture, density, and size consist.
- the size consist may change for silos designed for funnel flow, which change can cause segregation of the material according to size.
- the finer material will be in the center of the silo and be reclaimed first.
- the coarse material will be around the silo perimeter and be reclaimed last. Flow rates should increase toward the end of the train.
- the batching accuracy i.e., the actual weights of material charged to the first bin will have no effect on the total batching accuracy as long as the net weights of material discharged from the first bin are accurately determined.
- the total weight of material loaded into a car by that bin will be subtracted from the target weight.
- the balance will be batched into the second bin in a highly controlled manner. For example, if the target weight is 220,000 lbs. and the two combined batches of the first bin are set for 170,000 lbs., but actually batch and discharge 165,000 lbs., the second bin will batch 55,000 lbs. under carefully regulated conditions. Therefore, no effort need be made to make accurate predetermined batch charge weights to the first bin.
- the present loading method is carried out employing a silo 20 such as the circular ones shown, but which can be of any size and configuration, and having discharge ports 42 and 44 for bins 22 and 24 respectively, said silo typically being very large, e.g., sixty feet or so in diameter and two hundred feet or more high.
- the said discharge ports are usually circular but may be constructed of rectangular or other desired configuration. Their flow areas however, should be adequate to allow the bins to be completely filled in, e.g., about 3-6 seconds.
- the silo is supported about the tracks by heavy support beams 46 such as steel I beams or reinforced, prestressed concrete beams, or the like.
- the bins may be fabricated from welded sections such as the wedge shaped sections 48 and both bins may have substantially the structure and same configuration.
- Each bin is essentially free-floating in that it is hung from a stationary support by strain or compression type weighing means 50 , one embodiment of which is shown in FIG. 9 .
- Such means includes the known and readily available load cell devices including shear, beam, compression or tension, or the like weighing devices which allow a finite, but sometimes nearly imperceptible degree of movement of the bin in a generally vertical direction, either up when being emptied or down when being filled. This finite movement is sensed, measured, and converted to weight data by such devices which can then send the data to an electronic control center for conversion, e.g., to bin charging or discharge gate actuation signals.
- Weight measuring devices useful in carrying out the present invention are typified by those shown in the Revere Corporation of America, Wallingford, Conn., 1983 ⁇ brochure, 35 pages, and by pages 33 and 88 etc., of the Rice Lake Weighing Systems, 1996 brochure, 30534 pages. Any number of these devices may be used in concert and symmetrically positioned on each bin such as not to interfere with movable elements of the system such as the bin charging gates and their actuator mechanisms.
- each gate means can comprise a single slidable gate, or two oppositely slidable gates, or four slidable gates.
- the greater number of slidable gates generally allows for a more easily regulatable and precision flow rate of material into or out of the bin.
- a four gate means such as shown in FIGS. 3 and 4 may be employed for the charging.
- a precise material topping weight in the bin may be realized. It is noted that such progressive gate closings is preferably controlled according to quasi continuous net topping weight determinations of the material being dumped into the bin with respect to the aforesaid target weight and the two discharge net weights from the first bin 22 .
- the four gate construction can be used as the bin discharge gate means and the net weight of material going into the car continually determined to attain discharge of the proper topping weight.
- the gates are essentially heavy steel plates 52 preferably supported on rollers 54 which may be rotatably mounted either on the plate itself as shown in FIG. 14 or on the side or guide rail means 56 .
- the loading chute 40 is preferably rollably supported in the same manner, and as shown in FIG. 13 can be retracted laterally out of the way of locomotive or other obstruction after the lower, upwardly retractable portion 58 of the chute is retracted from its down or loading position shown.
- the gates and loading chute portion 58 are all actuated, i.e., moved by the action of an operator manipulating hand operated valving 59 to operate hydraulic or pneumatic cylinders 60 , or preferably by computer means in accordance with such electronic signals as generated for proper periods of charging and discharging with respect to material weights, target weight, position of the cars relative to the bins, and the like.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
Description
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/453,839 USRE37062E1 (en) | 1997-06-06 | 1999-12-02 | Coal loading system and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/870,862 US5772390A (en) | 1997-06-06 | 1997-06-06 | Coal loading system and method |
US09/453,839 USRE37062E1 (en) | 1997-06-06 | 1999-12-02 | Coal loading system and method |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US08/870,862 Reissue US5772390A (en) | 1997-06-06 | 1997-06-06 | Coal loading system and method |
Publications (1)
Publication Number | Publication Date |
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USRE37062E1 true USRE37062E1 (en) | 2001-02-20 |
Family
ID=25356210
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/870,862 Ceased US5772390A (en) | 1997-06-06 | 1997-06-06 | Coal loading system and method |
US09/453,839 Expired - Lifetime USRE37062E1 (en) | 1997-06-06 | 1999-12-02 | Coal loading system and method |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US08/870,862 Ceased US5772390A (en) | 1997-06-06 | 1997-06-06 | Coal loading system and method |
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US (2) | US5772390A (en) |
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US20060244201A1 (en) * | 2005-04-27 | 2006-11-02 | Koenig & Bauer Ag | Safety device in the sheet feeder |
US20120181093A1 (en) * | 2011-01-18 | 2012-07-19 | Ksi Conveyors, Inc. | Multi-flow bulk weighing system |
US12037029B2 (en) | 2022-01-20 | 2024-07-16 | Tsg Canada Holdings Inc. | Railcar systems and cargo transportation methods |
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GB1064434A (en) | 1964-08-08 | 1967-04-05 | Butterley Engineering Company | Improvements in or relating to hopper discharging apparatus |
SU725985A1 (en) | 1978-01-05 | 1980-04-05 | Государственный Научно-Исследовательский И Проектный Институт Угольной Промышленности | Method of continuous pressure-head loading of loose and lump materials into open railway cars |
SU765163A1 (en) | 1978-07-19 | 1980-09-23 | Государственный Научно-Исследовательский И Проектный Институт Угольной Промышленности "Укрниипроект" | Method of automatic metered-out loading of loose material into moving railway cars |
US4284380A (en) | 1979-08-27 | 1981-08-18 | Allen & Garcia Company | Multi-car train loading station |
SU880929A1 (en) | 1978-10-03 | 1981-11-15 | Киевский институт автоматики им.ХХУ съезда КПСС | Device for automatic monitoring of loading of vehicle |
JPS5936032A (en) | 1982-08-18 | 1984-02-28 | Komatsu Ltd | Loading device |
US4460308A (en) | 1982-02-08 | 1984-07-17 | Kerr-Mcgee Coal Corporation | Method for loading coal into railroad cars |
US4629392A (en) | 1984-07-16 | 1986-12-16 | Kerr-Mcgee Coal Corporation | System for batch loading coal into railroad cars |
US4659274A (en) | 1984-11-13 | 1987-04-21 | Accutrol Incorporated | Computer controlled load-out system |
US4904154A (en) | 1988-11-03 | 1990-02-27 | Kerr-Mcgee Coal Corporation | Loading system for railroad cars |
SU1664685A1 (en) | 1988-04-15 | 1991-07-23 | Государственный Научно-Исследовательский, Проектно-Конструкторский И Проектный Институт Угольной Промышленности "Укрниипроект" | Method for batched loading of friable materials |
-
1997
- 1997-06-06 US US08/870,862 patent/US5772390A/en not_active Ceased
-
1999
- 1999-12-02 US US09/453,839 patent/USRE37062E1/en not_active Expired - Lifetime
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GB1064434A (en) | 1964-08-08 | 1967-04-05 | Butterley Engineering Company | Improvements in or relating to hopper discharging apparatus |
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SU1664685A1 (en) | 1988-04-15 | 1991-07-23 | Государственный Научно-Исследовательский, Проектно-Конструкторский И Проектный Институт Угольной Промышленности "Укрниипроект" | Method for batched loading of friable materials |
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Non-Patent Citations (3)
Title |
---|
J.R. Johanson, "Method of Calculating Rate of Discharge for Hoppers and Bins," Transactions of SME, Mar. 1965, vol. 232. [Text included with Mar. 22, 1996 presentation above.] |
Letter submitted Apr. 12, 1996 by Production Industries Corporation to Kennecott Energy Company, "Cordero Precision Train Loadout System." |
Text of presentation Mar. 22, 1996 by Production Industries Corporation titled "Kennecott Energy Cordero Mining Unit Train Loading System." |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060244201A1 (en) * | 2005-04-27 | 2006-11-02 | Koenig & Bauer Ag | Safety device in the sheet feeder |
US7465139B2 (en) * | 2005-04-27 | 2008-12-16 | Koenig & Bauer Ag | Safety device in the sheet feeder |
US20120181093A1 (en) * | 2011-01-18 | 2012-07-19 | Ksi Conveyors, Inc. | Multi-flow bulk weighing system |
US12037029B2 (en) | 2022-01-20 | 2024-07-16 | Tsg Canada Holdings Inc. | Railcar systems and cargo transportation methods |
Also Published As
Publication number | Publication date |
---|---|
US5772390A (en) | 1998-06-30 |
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