US3759369A - Traveling grate - Google Patents

Traveling grate Download PDF

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Publication number
US3759369A
US3759369A US00225587A US3759369DA US3759369A US 3759369 A US3759369 A US 3759369A US 00225587 A US00225587 A US 00225587A US 3759369D A US3759369D A US 3759369DA US 3759369 A US3759369 A US 3759369A
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US
United States
Prior art keywords
grate
support plate
hinge
support plates
traveling grate
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
US00225587A
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English (en)
Inventor
A Vering
A Kluger
K Eiring
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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 Polysius AG filed Critical Polysius AG
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Publication of US3759369A publication Critical patent/US3759369A/en
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    • 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
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
    • 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
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/007—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface for conveying the load on the lower run or on both upper and lower runs of the conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H11/00—Travelling-grates
    • 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
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles

Definitions

  • a plurality of hingedly connected members each including a support plate for providing a substantially continuous transport surface in the upper section of the grate to support material conveyed by the grate, have pocket-like recesses on their inner sides.
  • Each support plate in the vicinity of its front and rear ends is hingedly connected with the adjacent support plates so that the support plates form a substantially continuous peripheral surface throughout the extent of the grate.
  • This invention relates to a traveling grate, comprising a plurality of hingedly connected members which by means of support plates form in the upper section of the grate a substantially continuous transport surface for the material conveyed by the grate.
  • traveling grates are used to convey material (such as pellets, granulated cement, etc.) through treatment zones wherein heat exchange take place between the material and a gas.
  • Previously known traveling grates consist in general of at least two endless chains running in parallel and connected together by grate bolts on which are disposed freely rotatable spacer bushes.
  • Each spacer bush is affixed to one end of a support plate so that while it is in the'upper section of the grate the said plate forms a transport surface for the material being treated which is outwardly almost closed, in that the free end of the support plate is supported on the next bush following.
  • the support plates tilt downwards at their free ends, resulting in considerable gaps between successive grate bolts or spacer bushes. The fine material falling through the upper section of the grate is supposed to pass through these gaps so as to be withdrawn from the interior of the housing.
  • the object of the invention is therefore to provide a traveling grate of the type described wherein without expensive auxiliary equipment, at least the coarser fraction falling through damaged support plates, and possibly the greater part of the fine material falling through are fed back to the inlet end of the traveling grate.
  • the grate members have pocket-like recesses open towards the interior of the grate, and the support plates in the vicinity of their front and rear ends are hingedly connected with the adjacent support plates in such a manner that said support plates also form a substantially closed peripheral surface in the area outside the upper section of the grate.
  • the material'dropping through the upper section of the grate is captured and conveyedby the members running below in the opposite direction, i.e., towards the entry end.
  • the material which has dropped into the pocket-shaped recesses drops downwards, and can be readily recovered and fed back to the grate.
  • the support plates form a substantially closed outer surface in all peripheral areas of the grate, i.e., are not hinged at one side as in the known grates, even in treating material with a very high proportion of fines the risk of an undesirably great amount of fine material falling through gaps caused by lifting of the support plates is avoided.
  • the material which falls out of the pocket-shaped recesses when the grate is reversed can be captured in a simple manner if a receiving container is disposed below the region wherein the rising grate is deflected into a substantially horizontal path of movement, said container having one wall which terminates a small distance from the inner periphery of the grate.
  • the falling material captured in this manner can then be fed back to the grate by means of a transverse conveyor leading from the receiving container.
  • each support plate made slightly arcuate in the longitudinal direction, has its one end bent inwards by about in relation to the transport surface, about the axis of the joint, and the adjacent end of the following support plate is in sliding contact with the resultant arcuate surface.
  • This construction of the sup port plate provides effective stiffening of the member and results in easier emptying of the pocket-shaped recess.
  • This arrangement of successiveumembers in accordance with the invention also provides agrate which, in the said areas at least, forms a relatively sealed transport surface. In thiscase it is desirable also that the contacting surfaces at the adjacent ends of the support plates in successive members be provided with wear inserts made from material with a low coefficient of friction.
  • FIG. 1 is a'purely schematic elevation of a traveling grate in accordance with the invention
  • FIGS. 2 and 3 are fragmentary elevations (II and III) of the traveling grate shown in FIG. 1;
  • FIG. '4 is a plan view of the two hingedly connected members shown in FIG. 3;
  • FIG. 5 is an elevation of the two members of a modi DESCRIPTION OF T l-IE PREFERRED EMBODIMENTS
  • the traveling grate 1 as provided by the invention and shown in FIG. 1 comprises a plurality of members hingedly connected together.
  • The: upper section .2 of the traveling grate 1 forms a transport surface for material being treated (pellets, cement granulate or the like), which is to be fed through one or more treatment zones, for instance for preheating, firing and/or cooling.
  • the largely closed transport surface is formed by support plates on the hingedly connected members.
  • the traveling grate moves in the direction of arrow 3 and is deflected around an axis A at its inlet end, around an axis A; at its outlet end, and around axes A, and A, in its lower section.
  • the grate members 4 are open towards the grate interior, and have pocketshaped recesses 5,5 (see FIGS. 2 and 3).
  • the support plates are made slightly bowed in the longitudinal direction of the grate, and adjacent their front and rear ends are hingedly connected to the adjacent support plates so that a substantially continuous peripheral surface is formed both in the upper section 2 of grate 1 and also in the area outside the upper section of the grate.
  • a receiving container 7 is disposed in the interior of grate 1 below its reversal point (deflection axis A
  • the one wall 7a of this receiving container ends at a slight distance from the inner periphery of the grate, with the end of the wall 70 matched to the curvature of the grate somewhat in the manner of a tongue.
  • the falling material caught by the receiving container 7 can then be removed from the grate interior, for instance by the transverse conveyor 8, and returned to the upper section of the grate.
  • the transverse conveyor 8 can also be replaced by inclined base sheets in the nature of a chute below the receiving container 7, which remove the deposited material from the interior of grate 1.
  • each member 4 has a transverse rib 9 extending generally transversely to the direction of movement of the grate and perpendicular to the transport surface formed by the upper section.
  • transverse rib 9 On each side of transverse rib 9 are provided stiffening ribs running in the longitudinal direction of the member. The ends of the stiffening ribs 10, 10a,
  • spacer bushes 11, 11a are fixedly attached to spacer bushes 11, 11a.
  • stiffening rib l2 is used only to stiffen the member 4.
  • Support brackets 13, 13a are secured to transverse rib-9 and at their ends jointly support a further spacing bush 14.
  • the spacer bushes 11,11a are relatively short and at their outer ends are flush with the side'edges of member 4. Between the facing inner ends of the spacer bushes 11, 11a is a gap corresponding in general to the length of spacer bush 14.
  • the spacer bushes 11,11a and 14 all have at least the same internal diameter, and act as coupling elements for successive grate members which are to be hingedly joined together.
  • a grate bar 15 is inserted through the interengaged and aligned bushes 11,11a and 14 in order to connect hingedly the successive members 4 (see FIG. 4).
  • the support plate 6 of member 4 is bent inwards through about 90 from the conveyor surface, about the axis of the bushes 11,1la which in this area forms the pivot axis of the member.
  • the slightly arcuate support plate 6 projects generally freely (see FIG. 3).
  • the adjacent plate end of the following members in sliding contact with the arcuate surface formed at the end 60. Consequently when the traveling grate l is deflected over one of the axes A -A the rear support plate end 6b of one member slides along the end 6a of the adjacent member.
  • the successive support plates 6 therefore form a relatively sealed transport surface.
  • wear inserts 6a, 6b made from material with a low coefficient of friction can be provided at the contacting surfaces of adjacent support plate ends.
  • the grate members in accordance with the invention and as particularly described in relation to FIGS. 3 and 4 form a stable embodiment, suitable especially for very robust traveling grates.
  • FIGS. 5-8 show further embodiments of grate members in accordance with the invention.
  • FIG. 5 shows a side view of two intercoupled members. This side view applies generally to all of the three embodiments shown in FIGS. 6-8. I
  • the embodiment shown in FIG. 6 of a member 16 in accordance with the invention relates to a relatively light grate construction.
  • the grate member 16 consists in general of a support plate 17 corresponding in general shape and construction to the support plate 6 in the first embodiment, with a longitudinally extending sifi'ening rib 18.
  • This stiffening rib 18 is placed at about the middle of plate 16, and at its end 18a which is at the end of support plate 16 provided with an arcuate surface, there is a claw-like structure 22.
  • the claw end is provided with a bore 19 whose axis coincides with the axis of curvature of the arcuate surface of this support plate 17 and thus with the pivoting axis for this member 16.
  • the opposite and generally straight end 18b of the stiffening rib 18 projects beyond the support plate 17, and is provided with a bore 20 whose axis coincides with the pivotal axis of the adjacent grate member.
  • the straight end-18b of the stiffening rib 18 of the preceding member is inserted in the claw-like structure 22 at the end 18a of the stiffening rib 18 of the following member, so that holes 19,20 are aligned and can be hingedly connected together by means of a grate bar 21.
  • the arcuately shaped end 22 of each support plate 17 has a corresponding slot, of width such that the end 18b can slide to and fro therein.
  • the stiflening rib 18 in the previous embodiment is replaced by two stiffening'ribs 24 and 25 extending generally along the side edges of support plate 17'. While the ends 24a and 25a of the stiffening ribs 24,25 are inwardly cranked in the area of the arcuately upturned end of the support plate, by about the thickness of a stiffening rib, the opposite straight ends 24b and 25b can project beyond the other support plate end as in the preceding example.
  • the ends of the stiffening ribs 24 and 25 are again provided with bores, so that succeeding and interconnected grate members 23 can be hingedly coupled together by means of a grate bar.
  • FIG. 8 shows an embodiment which is only slightly varied from the example shown in FIG. 7.
  • the main feature of this embodiment is that two slightly differing types of member are provided.
  • the members 27,28 are however made somewhat more simply than in the preceding example, due to the generally straight stiffening ribs 29, 30 and 31, 32, which are easier to manufacture.
  • the stiffening ribs 29,30 of the one member 27 are generally flush with the side edges of the support plate 17".
  • the stiffening ribs 31,32 of the next following grate member 28 are inwardly displaced by about the thickness of a stiffening rib, so that they lie against the insides of the ends of the adjacent stiffening ribs 29,30 which cooperate with them in hinge coupling engagement.
  • the hinge joint between two grate members 27,28 in longitudinal sequence can also be formed by means of a grate bar 26.
  • An endless traveling grate for transporting material through a heat exchange zone, having a substantially horizontal upper run, a descending section, a lower run and a rising section, wherein the improvement comprises a series of support plates each comprising a hinge, each plate having at one end an arcuate portion the axis of which is the axis of the hinge, having a portion at its other end in sliding contact with such arcuate portion of the succeeding support plate, and
  • a receiving container which has, rigid therewith, at least one arm which extends beyond said other end and is pivotally connected to the hinge of such succeeding support plate, the inner sides of the support plates forming open, pocket-like recesses between adjacent such arcuate portions, a receiving container which has a wall that terminates close to the inside of the rising section of the grate, for receiving material that has fallen from the recesses of the upper run of the grate and a transversely extending conveyor positioned below said container, for receiving and removing material from the receiving container.
  • each support plate has, on its inner surface, a transverse rib, and at least one longitudinal stiffening rib having attached at its end a spacing bush forming part of said hinge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Tunnel Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Chain Conveyers (AREA)
US00225587A 1971-03-02 1972-02-11 Traveling grate Expired - Lifetime US3759369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2109948A DE2109948C3 (de) 1971-03-02 1971-03-02 Wanderrost

Publications (1)

Publication Number Publication Date
US3759369A true US3759369A (en) 1973-09-18

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US00225587A Expired - Lifetime US3759369A (en) 1971-03-02 1972-02-11 Traveling grate

Country Status (7)

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US (1) US3759369A (enExample)
JP (1) JPS5221988B1 (enExample)
CH (1) CH539565A (enExample)
DE (1) DE2109948C3 (enExample)
FR (1) FR2128498B1 (enExample)
GB (1) GB1365803A (enExample)
IT (1) IT946739B (enExample)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344524A (en) * 1980-08-21 1982-08-17 Koppers Company, Inc. Fines removal in horizontal coolers
US4406036A (en) * 1980-05-08 1983-09-27 Machinefabriek G. J. Nijhuis B.V. Apparatus for conveying animals to be stunned
US4600380A (en) * 1983-09-08 1986-07-15 Wedel Karl Von Grate plates retaining solids and improving gas distribution to be used in grates for the heat treatment of solid material
US5613597A (en) * 1993-08-26 1997-03-25 Kvp Systems, Inc. Transfer method for plastic conveyor belts
US20010023827A1 (en) * 1999-01-12 2001-09-27 Changsheng Liu Copolymers capillary gel electrophoresis
EP1329666A1 (de) * 2002-01-14 2003-07-23 Polysius AG Austragsboden
US20050150129A1 (en) * 2002-05-17 2005-07-14 Heinz Resch Pasta dryer
US10124960B2 (en) * 2015-02-05 2018-11-13 Rexnord Flattop Europe B.V. Chain conveyor with adjustable distance between shafts
US20230228490A1 (en) * 2020-05-07 2023-07-20 Paul Wurth S.A. Grate bar for a pelletizing or sintering machine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2742100C3 (de) * 1977-09-19 1981-12-17 Krupp Polysius Ag, 4720 Beckum Wanderrost
JPS54164090U (enExample) * 1978-05-09 1979-11-16
DE3833224A1 (de) * 1988-09-30 1990-04-05 Morlock Erwin Ermo Automation Scharnierbandkette
DE9014327U1 (de) * 1990-10-16 1991-01-17 Deutsche Babcock Energie- Und Umwelttechnik Ag, 46049 Oberhausen Vorrichtung zum Beschicken einer Feuerung
WO2003031895A1 (en) * 2001-10-10 2003-04-17 Rockwool International A/S A curing oven
US8752698B2 (en) 2011-12-06 2014-06-17 Ashworth Bros., Inc. Conveyor belt with alignment features
ES2913549T3 (es) * 2011-12-06 2022-06-02 Ashworth Bros Inc Cinta transportadora con características de alineación

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241654C (enExample) *
US516702A (en) * 1894-03-20 franklin
US565199A (en) * 1896-08-04 Lubricating chain-link
US848236A (en) * 1905-08-31 1907-03-26 Henry Gabriel Ginaca Apron conveyer.
US1100148A (en) * 1914-02-25 1914-06-16 Holt Caterpillar Co Traction-engine.
US1971553A (en) * 1930-08-29 1934-08-28 Link Belt Co Chain
US2112911A (en) * 1936-02-29 1938-04-05 Int Harvester Co Endless conveyer wear plate
US2597064A (en) * 1949-07-15 1952-05-20 Charles T Burr Automatic feeding system
US3034638A (en) * 1958-08-26 1962-05-15 May Fran Mfg Company Conveyor belt structures

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241654C (enExample) *
US516702A (en) * 1894-03-20 franklin
US565199A (en) * 1896-08-04 Lubricating chain-link
US848236A (en) * 1905-08-31 1907-03-26 Henry Gabriel Ginaca Apron conveyer.
US1100148A (en) * 1914-02-25 1914-06-16 Holt Caterpillar Co Traction-engine.
US1971553A (en) * 1930-08-29 1934-08-28 Link Belt Co Chain
US2112911A (en) * 1936-02-29 1938-04-05 Int Harvester Co Endless conveyer wear plate
US2597064A (en) * 1949-07-15 1952-05-20 Charles T Burr Automatic feeding system
US3034638A (en) * 1958-08-26 1962-05-15 May Fran Mfg Company Conveyor belt structures

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406036A (en) * 1980-05-08 1983-09-27 Machinefabriek G. J. Nijhuis B.V. Apparatus for conveying animals to be stunned
US4344524A (en) * 1980-08-21 1982-08-17 Koppers Company, Inc. Fines removal in horizontal coolers
US4600380A (en) * 1983-09-08 1986-07-15 Wedel Karl Von Grate plates retaining solids and improving gas distribution to be used in grates for the heat treatment of solid material
AU575341B2 (en) * 1983-09-08 1988-07-28 Karl Von Wedel Grate plates retaining solids and improving gas distribution
US5613597A (en) * 1993-08-26 1997-03-25 Kvp Systems, Inc. Transfer method for plastic conveyor belts
US20010023827A1 (en) * 1999-01-12 2001-09-27 Changsheng Liu Copolymers capillary gel electrophoresis
EP1329666A1 (de) * 2002-01-14 2003-07-23 Polysius AG Austragsboden
US20050150129A1 (en) * 2002-05-17 2005-07-14 Heinz Resch Pasta dryer
US7210574B2 (en) * 2002-05-17 2007-05-01 Buehler Ag Pasta dryer
US10124960B2 (en) * 2015-02-05 2018-11-13 Rexnord Flattop Europe B.V. Chain conveyor with adjustable distance between shafts
US20230228490A1 (en) * 2020-05-07 2023-07-20 Paul Wurth S.A. Grate bar for a pelletizing or sintering machine
US12492866B2 (en) * 2020-05-07 2025-12-09 Paul Wurth S.A. Grate bar for a pelletizing or sintering machine

Also Published As

Publication number Publication date
DE2109948C3 (de) 1974-01-24
IT946739B (it) 1973-05-21
CH539565A (de) 1973-07-31
DE2109948B2 (de) 1973-06-28
GB1365803A (en) 1974-09-04
FR2128498B1 (enExample) 1976-03-05
FR2128498A1 (enExample) 1972-10-20
JPS5221988B1 (enExample) 1977-06-14
DE2109948A1 (de) 1972-10-05

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