CA2049064A1 - Road surface recycler - Google Patents
Road surface recyclerInfo
- Publication number
- CA2049064A1 CA2049064A1 CA002049064A CA2049064A CA2049064A1 CA 2049064 A1 CA2049064 A1 CA 2049064A1 CA 002049064 A CA002049064 A CA 002049064A CA 2049064 A CA2049064 A CA 2049064A CA 2049064 A1 CA2049064 A1 CA 2049064A1
- Authority
- CA
- Canada
- Prior art keywords
- road surface
- road
- recycler
- bin
- conveyor
- 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.)
- Abandoned
Links
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
- E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
Abstract
A road surface recycler for cutting road pavement material from a road, pulverizing that material, mixing it with a liquid binder and relaying it onto the road surface. A single mobile structure carries a reclaimer drum (14) for cutting paving material from the road, a pulverizer (22) for breaking up the material and mixing it with a binder and a delivery means (56) for relaying the material onto the road. The reclaiming drum (14) is driven in a direction (17) to cut downwardly into the road surface (40) and pass the cut material rearwardly under the drum for delivery to the pulverizer. The pulverized material is delivered to a surge bin (51) which can accumulate material until it can be deposited on the road at a position already traversed by the reclaimer drum.
Description
W090/10752 - 1 - 2 ~ fl 9 ~ 6 ~ PCT/AU90iOo109 ROAD SURFACE RECYCLER
. _ _ . , _ TECHNICAL FIELD
This lnvent~on relates to load surface recycling.
In the past in the ~nited State~ lt has been known to provlde a road surface recycllng sys~em which comprlses a moblle surface reclaimer which remoYes pavlng materlal from the surface of a road by means of a rotatlng drum whlch has cuttlng blts around the periphery. The drum rotates so as to cut ln an upward dlrectlon lnto the road surface whlch produces large p~eces of pav~ng materlal. These are fed onto a conveyor whlch extends out behind the ~urface reclaimer to a ~urth~r moblle machlne travelling behind the reclalmer. The further machlne lncludes a screening system arranged to pass relatlvely small pieces to a mixlng means where the smaller pieces and blnding material are mix~d. Larger pieces ~re passed from the screening means to a crusher towed by the moblle machine, the output o~ the crusher b~lng fed bacX through the ~creening means to the mlxer. Behind the 3creening, crushing and mlxing machlne there is further moblle machine which receivo~ the output of the mlx0r ~ urthe~ conveyor, the m~xor outpu~
belng fed to a hopper ~rom whioh m~tor~al i~ m~ter~d to ~ paver machlne ~or repavlng th~ road sur~ce.
Thls system ls very costly and also the "train" of mobile machlnery is too long to be turned around so as to travel ln the opposlte dtrectlon wlthout dlsconnecting the machlnes from one another and lndlv~dually turnlng the machlnes around followed by agaln coupllng them toyether ln thelr worklng relatlonshilp. The present lnventlon provtdes a road surface recycler by which reclalmlns, pulverlzlng and relay~ng of mater~al can be carrled out ~y a s~ngle moblle machlne whlch is relatlvely compact and easy to operate.
DISCLOSURE OF THE INVENTION
c . . .
According to the lnventlon there ls provlded a road surface recycler comprising:
a mobile structure mounted on ground engag~ng means ~`~ adapted to support the mobile structure ~or movement across the ground whereby the structure can be advanced along a pa~ed road;
.
. ,\ .. ., - , , , . ` ' . , ,.,,, ~ . , . . . ~ ' . ' ' ' . . .
. _ _ . , _ TECHNICAL FIELD
This lnvent~on relates to load surface recycling.
In the past in the ~nited State~ lt has been known to provlde a road surface recycllng sys~em which comprlses a moblle surface reclaimer which remoYes pavlng materlal from the surface of a road by means of a rotatlng drum whlch has cuttlng blts around the periphery. The drum rotates so as to cut ln an upward dlrectlon lnto the road surface whlch produces large p~eces of pav~ng materlal. These are fed onto a conveyor whlch extends out behind the ~urface reclaimer to a ~urth~r moblle machlne travelling behind the reclalmer. The further machlne lncludes a screening system arranged to pass relatlvely small pieces to a mixlng means where the smaller pieces and blnding material are mix~d. Larger pieces ~re passed from the screening means to a crusher towed by the moblle machine, the output o~ the crusher b~lng fed bacX through the ~creening means to the mlxer. Behind the 3creening, crushing and mlxing machlne there is further moblle machine which receivo~ the output of the mlx0r ~ urthe~ conveyor, the m~xor outpu~
belng fed to a hopper ~rom whioh m~tor~al i~ m~ter~d to ~ paver machlne ~or repavlng th~ road sur~ce.
Thls system ls very costly and also the "train" of mobile machlnery is too long to be turned around so as to travel ln the opposlte dtrectlon wlthout dlsconnecting the machlnes from one another and lndlv~dually turnlng the machlnes around followed by agaln coupllng them toyether ln thelr worklng relatlonshilp. The present lnventlon provtdes a road surface recycler by which reclalmlns, pulverlzlng and relay~ng of mater~al can be carrled out ~y a s~ngle moblle machlne whlch is relatlvely compact and easy to operate.
DISCLOSURE OF THE INVENTION
c . . .
According to the lnventlon there ls provlded a road surface recycler comprising:
a mobile structure mounted on ground engag~ng means ~`~ adapted to support the mobile structure ~or movement across the ground whereby the structure can be advanced along a pa~ed road;
.
. ,\ .. ., - , , , . ` ' . , ,.,,, ~ . , . . . ~ ' . ' ' ' . . .
2~'~.9~
w09~07s2 - 2 - pcrtAu9o/oolo9 a paving material ~eclaimer mounted on the mobile structure and operati~e when the mobile structure i5 advanced alo~g a pa~ed road to cut road pavlng material from the surface of the road; , a pulverlzer mounted on the moblle structure to recelve road pavlng material cut ~rom the road ~y the ; reclalmer; and dellvery means to dellv~r pulverlzed materlal from the pulverlzer onto the road surface from which pavlng materlal has been removed by the reclalmer.
Pr~Perably the road sur~ace reclaimer co~prlses a rotary drum fltted wlth cuttlng el0ments around l~s clrcumference and mounted on the moblle structure for rotatlon about a generally horlzontal axls transverse to the dlrectlon of travel of the recycler and reclaimer drlve means operatlve to drlve the drum ln such a dlrectlon as to cut downwardly into the sur~ace of the road so that pavlng material cut ~rom the road surface ~s pa~ed rearwardly o~ the directio~ of travel beneath the drum.
Pre~erably ~urthor, khe mohilc ~txucturc ~l~o carrio a ~ln to recelve pulverlzad m~t~r~ rom the pul~eriz~r and the dellvery ~eans comprise~ a conveyor operable to transport pulverized materlal ~rom the bln ~nd to dellver lt onto the road sur~ace.
The moblle structure may carry a screed to spread pulverlzed materlal dellvered by the conveyor onto the road surface and the conveyor ~ay be operable normally to dell~er pulverlzed materlal from the bln to the road surface ahead of the screed but may be alternatl~ely operable to d~scharge pulver~zed ~rom She bln from the rear of the recycler.
BRIEF DESCRIPTTON OF DR~WINGS
In order ~hat the lnventlon may be more fully explalned, one par~lcular embodlment wlll be descrlbed wlth reference to the accompanylng drawlngs ln ~hlGh Figure 1 Is a slde ele~ation ~ a road s~r~ace recycler constructed ln accordance w~th the lnventlon;
Flgure 2 ls a vertlcal cross-s~ctlon through the ~a~n parts o~ the road recycler lllustrated ln Flgure 1; 2nd ...: ,, ~, .. .
: ~ . . ' ' :, . .. ' ' ' . ' ' , ' ' : , . ' ' , . ', ` .': .:
WO 90/10752 ~ - 2 ~ A 9 ~ ~ ~PCrlAU90/00109 Flgure 3 lS a cross-sectionr~aken ~enerally on the llne 3-3 ln Flgure 2.
BEST MODE OF CARRYING OUT THE INVEN~ION
. ~
The lllustrated ~oad surface recycler ~omprlses a moblle maln machlne structure denoted generally as 1, mounted on groundlng engaglng means in the form of front and rear crawler assemblles 2 and 3 spaced longltudlnally of ~he dlrectlon of travel of the recycler. The two front crawler ai~seimblies 2 are disposed one to each side of the machlne and each compri~es a steering bog~e q carrylng idler ~prockets S
i and a crawler tracX 6. Each bogie 4 i5 mounted on a post 7 whlch extend~ up into a housing at the front end of the maln machlne structure 1. The rear pair of crawler assei~blies 3 are :
also disposed one to each side of the machine. Each rear assembly comprises a dxiving bogie 8 mounted on a post 9 ~nd fitted with sprockets lO and crawlex tr~ck 11. E~ch of the driving bogie~ 8 carrics ~ hydr~ul~c motor coupled to one o~
the sprockets to drive the crawl~r tr~ck 11 whoreby tho m~chine can be prop~ d along ~ ro~d 1~ ~ithor d~ctic~. The mounting posts 9 ~or the rear arawl~x assembll~s ~xtond up into the maln machine ~rame structure 1. Both the forward posts 7 and rearward posts 9 may incorporate hydraullc rams operable to raise and lower the maln machlne structure on the crawler .. . .
asseimblies so as to allow the machine to be ralsed from its normal operating condition for transport and manouvering onto a low loader.
The hydraulic controls for the drive motors, the steering gear and varlous other components of the machine yet to be des~r$bed are grouped together ln a control console 12 at an operator's station 13 located near ~he forward end of the machine.
Between the ~orw~rd cra~ler assem~lies 2 ~nd the rearward crawler asseimblies 3, the maln machine frame carrle~ a road pavlng reclalmer drum 14 fltted wlth cutting elements lS
around lts circumference and mounted on structure 1 by a sha~t 16 for rotatlon about a horlzontal ~x19 extend~ng transver~e to the d~rection of travel of th~ m~chlne. The r~c~almer drum ~s drlven from a power take-o~f vl~ a gear box, clutch and pulley and belt drive ~n the dlrect~on lndlcated by the 2 ~ l~ 9 ~ ~ L¦
wos~/l07s2 - 4 - PCT/AU90/00l09 arrows 17 so that as the reclalmer advances ~orwardly along a paved road surface 20, the reclalmer drum cuts downwardly lnto the road surface to cut pavlng material from the road surface and to pass the cut material rearwardly of the direction of travel beneath the drum. The downward cuttlng actlon ensures that large pleco~ of paYlng are not llfted from the road surface but pieces are cut progressively to a generally small slze determlned by the spaclng of the cutters around the drum. The ~rum and ~utters al~o act to pulverize the cut material to som~ extent as it pass~s under the drum.
Paving material eut ~rom the paved road surface and passing rearwardly beneath the drum ls collected ~y a bucket elevator denoted generally as 21 whlch llfts the materlal rearwardly and upwardly to dlscharge it lnto a pulvertzer denoted generally as 22 which 19 mounted on the maln machine frame structure 1 behlnd and above the reclalmer drum 14.
Bucket elevator 21 compri~es a series o~ bucXet~ 30 ~ixed to drive chalns 2~ extending ~round lower idlor sprock~ts ~4 ~nd drive sprockets ~S ~riven ~rom a hydr~ullc mo~or ~6. Th~
bucket assembly 1~ disposed wi~hin ~n ~levator houslng ~7 havlng a bottom lnlet openlng 28 ~nd an upper dlscharge openlng 29. The lower end o~ houslng 27 ls formed wlth a downwardly and forwardly pro~ectlng scoop extenslon 31 to scoop up the cut materlal and dlrect lt lnto the elevator openlng Z8 whence ~t is llfted by the buckets 30 to the top of the elevator houslng and dlscharges through the openlng 29 lnto the pulverlzer 22.
Pulverlzer 22 may be constructed as a conventlonal pug mill. It comprises a sturdy steel pulverlzlng vessel 32 with top hatches 33 and a bottom discharge opening 34 a~ the rear end of the vessel 32. The pul~erizlng vessel deflnes a rec~angular pulverizing chamber in which are mounted two contr~-rotatlng paddle assemblles 35. The paddle assemblles compr~se paddle arms 36 radiatlng out from two parallel paddle ,~ sha~ts 37 extending through the pulverlzing chamber ln the front to rear d~rect~on. In the mid part o~ the pulveri2ing ; chamber the paddle arms o one assembly pro~ect between the arms of the other assembly and the two sets o~ paddle arms are contra-rotated as indlcated by the arrows 38 by the operation ~, ` ' ' , ' `, ' ' . ` ~ ~ . ' ` ' ` ' . ~'' ~ ' ' ' ' ' . .
WO90/1Q7~2 _ 5 _ 2 ~ Ot3~ pcT/Auso/oo1o9 of a hydraulic motor ~9 mounted at the rear of the pul~erizer vessel and drlving the shafts 37 through a belt drive 41. The action of the paddles on th2 reclaimed road mat~rlal delivered into the pulverizing chamber is to mlx the material and to move it progressively to the rear of the pulverlzing chamber toward the bottom discharge outlet 34.
The ~eclalmed paving material ln the pulv~rlzer ~2 ls mlxed with a llquld binder ln the form of a water and bltumen emulsion sprayed into the pulverizer chamber through a plpe manifold 42 exte~dlng through th~ upper part of the chamber rearwardl~ from the lnlet and provided with sprays 43. The emulslon is supplied to the plpe manlfold from a tank 45 mounted on the machine frame structure 1 or ~rom a separate tanXer driven ~n front of or beslde the reclaimer. An auxlliary water supply manifold 44 also extends through the upper part of the pulverlzer chamber. Ad~iltlonal water can be spr~yed into the pulverlzer chamber through this auxlllary mani~old when necessary to lncrease the moiqture con~ent o~ the mixture lea~ing the pulverizer.
The pulverized mlxturo o~ r~claim~d ro~d m~teri~l and .
emulslon dropR through thc pul~er~z~r outlct 34 into ~ surge bin 51 whi~h 19 mounted on the main machine structure 1 lmmedlately below the pulverlzer. ~in 51 has uprlght front and rear walls 52, 53 and sld~ walls S4 which slope laterally lnwardly of the machlne to a bottom outlet 55. A belt conveyor 56 extends across the bottom outlet 55 of the bln ln the front to rear directlon of the ma~h~ne. Conveyor 56 comprl3es a con~eyor belt 57 mounted on front and rear rollers 5B, 59 and the ~ront rollers are drlveable by an ~nternal hydraulic motor 60 to drl~e the con~eyor belt ln forward and reYerse directions. When the conveyor belt ls drlven ln the forward d~rection ~t transports mater~al ~rom the bottom of the surge bln 51 forwardly of the machlne and drops ~t onto the road surface 40 ~rom whlch pavlng materlal has been removed by the reclalmer 14. The ~ront wall 52 of b~n 51 carr~es a vertlcal sllde plate 61 whlch can be ralsed and lowered by operatlon of a hydraulic ram 62 to ~ary the rate o~ ~eed o~ materlal ~om the b~n when the conveyor i~ operated to dl~charge mater~al .. 1`., '., WO90/10752 - 6 _ 2 ~ o ~ 4 PCT/AU90/00109 forwardly from the bin.
When conveyor 57 is ~perat~d to convey materlal forwardly from the ~in it discharges the materlal o~to the road surface 40 in advance of ~ screed assembly 63 dlsposed beneath the conveyor 57 and mounted on th~ machlne structure 1 vla a pair of plvot arms 64. The ~creed ~ssembly comprlses a pair of splral ~ugers 65 extendlng transversely of the machlne and a screed plate 66 wlth an upturned l~adlng edge 67 extendlng across the machine lmmediately behlnd the augers 65. The augers are driven independently o~ one another through internal hydraulic motors so as to spraad the materlal depo~ited into a wlndrow by conveyor 57 across the road surface before lt is finally consolldated a~d smoothed by the actlon of the screed plate 66. The screed assembly slmply hangs under lts own welght on plvot arms 64 to level the deposlted materlal. The angle of attack of the screed can be varled by rals~ng and lowering the ~orward ends of the plvot arms 64 by th~ operation of a pair of hydraulic ram~ 71. Th~ lowor ~nds of rams 71 arc pivotally attached to lugY 72 ad~acent the ~ront ond~ o~ p~vot arms 64 whlch are provld~d wlth pins 73 on~ging vextical ~lide ~.
bars 74 fixed to the main machlne ~tructure 1. The front ends of plvot bar 74 are thus held at a height dependant on the settlng of rams 71 and are free to pivot about the pivot connections 72 but the substantlal drag foxc~s applled to the arms 64 are transmltted to the machlne frame vi~ the pins 73 and bars 74. Two addltional hydraullc rams 75 are connected between the machlne fr~me and the screed ~ssembly so as to be operatlve to llft the screed assembly well away from the road surface for tra~sport.
The rear wall 53 of surge bln 51 ls provided wlth a rearwardly openlng gate 81 to allow rapld dlscharge of materlal from the rear of the ~ln by reverse operatlon of conveyor 57.
~aterlal may thus be dumped dlrectly ln a plle or wlndrow behlnd the machlne or may be dlscharged lnto an elevator brought up to the rear of the machlne to transfer th~ materlal lnto another vehlcle for transport to another locatlon.
. :' ' , ' " ' ' ' ., , ' .: , ,, ' , ~ " ~
WO90/107~2 7 2 ~ fi ~ PCT/AU90/00l09 A palr o~ wlng platforms 82 pro~ect ~rom the rear of the screed assembly. An operator may s~and on on~ ~f th~se platforms to malntain lnspectlon of the ~lnished surf~ce of the recycled materlal. Remote controls may be provlded at thl~
locatlon for control o~ the conveyor 57, feed rate ad3ustment sams 62 and the screed ad~ustment rams 71.
-- Surge bln ~1 has suf~lclent capac~ty to carry an amount of pavlng materlal whlch ls cut ~rom a length of a paved road sur~ace equal to the dlstance ~etween the reclnimer dr~n 14 and the 3creed assembly 63. ~his e~abl~s materlal to be carrled forward at the commencement o~ a reclalming run untll lt can be deposited on that part of tbe road from which materlal has been removed. In conventlonal machlnery without the pro~lslon of such a surge bln, the removed material must be deposlted contlnuously and at the commencement of a Tun the ; material ls therefors dumped onto an unreclalmed part of the road and must be subsequently collected. The bln capaclty should be sufficient to accomodate materlal cut ~xom a road with a paving khicXness up to about 150 mm. A typical machine may have a cut~lng width o~ two metres and an e~ective distance between the reclalme~ and thfl ~cre0d o~ about 3.3 metres. For a pa~ement thickness of 150 ~n the minlmum capaclty requirement would be about ~.22 tonnes ln whlch case the bin may typically have a capaclty of about 3 tonnes.
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w09~07s2 - 2 - pcrtAu9o/oolo9 a paving material ~eclaimer mounted on the mobile structure and operati~e when the mobile structure i5 advanced alo~g a pa~ed road to cut road pavlng material from the surface of the road; , a pulverlzer mounted on the moblle structure to recelve road pavlng material cut ~rom the road ~y the ; reclalmer; and dellvery means to dellv~r pulverlzed materlal from the pulverlzer onto the road surface from which pavlng materlal has been removed by the reclalmer.
Pr~Perably the road sur~ace reclaimer co~prlses a rotary drum fltted wlth cuttlng el0ments around l~s clrcumference and mounted on the moblle structure for rotatlon about a generally horlzontal axls transverse to the dlrectlon of travel of the recycler and reclaimer drlve means operatlve to drlve the drum ln such a dlrectlon as to cut downwardly into the sur~ace of the road so that pavlng material cut ~rom the road surface ~s pa~ed rearwardly o~ the directio~ of travel beneath the drum.
Pre~erably ~urthor, khe mohilc ~txucturc ~l~o carrio a ~ln to recelve pulverlzad m~t~r~ rom the pul~eriz~r and the dellvery ~eans comprise~ a conveyor operable to transport pulverized materlal ~rom the bln ~nd to dellver lt onto the road sur~ace.
The moblle structure may carry a screed to spread pulverlzed materlal dellvered by the conveyor onto the road surface and the conveyor ~ay be operable normally to dell~er pulverlzed materlal from the bln to the road surface ahead of the screed but may be alternatl~ely operable to d~scharge pulver~zed ~rom She bln from the rear of the recycler.
BRIEF DESCRIPTTON OF DR~WINGS
In order ~hat the lnventlon may be more fully explalned, one par~lcular embodlment wlll be descrlbed wlth reference to the accompanylng drawlngs ln ~hlGh Figure 1 Is a slde ele~ation ~ a road s~r~ace recycler constructed ln accordance w~th the lnventlon;
Flgure 2 ls a vertlcal cross-s~ctlon through the ~a~n parts o~ the road recycler lllustrated ln Flgure 1; 2nd ...: ,, ~, .. .
: ~ . . ' ' :, . .. ' ' ' . ' ' , ' ' : , . ' ' , . ', ` .': .:
WO 90/10752 ~ - 2 ~ A 9 ~ ~ ~PCrlAU90/00109 Flgure 3 lS a cross-sectionr~aken ~enerally on the llne 3-3 ln Flgure 2.
BEST MODE OF CARRYING OUT THE INVEN~ION
. ~
The lllustrated ~oad surface recycler ~omprlses a moblle maln machlne structure denoted generally as 1, mounted on groundlng engaglng means in the form of front and rear crawler assemblles 2 and 3 spaced longltudlnally of ~he dlrectlon of travel of the recycler. The two front crawler ai~seimblies 2 are disposed one to each side of the machlne and each compri~es a steering bog~e q carrylng idler ~prockets S
i and a crawler tracX 6. Each bogie 4 i5 mounted on a post 7 whlch extend~ up into a housing at the front end of the maln machlne structure 1. The rear pair of crawler assei~blies 3 are :
also disposed one to each side of the machine. Each rear assembly comprises a dxiving bogie 8 mounted on a post 9 ~nd fitted with sprockets lO and crawlex tr~ck 11. E~ch of the driving bogie~ 8 carrics ~ hydr~ul~c motor coupled to one o~
the sprockets to drive the crawl~r tr~ck 11 whoreby tho m~chine can be prop~ d along ~ ro~d 1~ ~ithor d~ctic~. The mounting posts 9 ~or the rear arawl~x assembll~s ~xtond up into the maln machine ~rame structure 1. Both the forward posts 7 and rearward posts 9 may incorporate hydraullc rams operable to raise and lower the maln machlne structure on the crawler .. . .
asseimblies so as to allow the machine to be ralsed from its normal operating condition for transport and manouvering onto a low loader.
The hydraulic controls for the drive motors, the steering gear and varlous other components of the machine yet to be des~r$bed are grouped together ln a control console 12 at an operator's station 13 located near ~he forward end of the machine.
Between the ~orw~rd cra~ler assem~lies 2 ~nd the rearward crawler asseimblies 3, the maln machine frame carrle~ a road pavlng reclalmer drum 14 fltted wlth cutting elements lS
around lts circumference and mounted on structure 1 by a sha~t 16 for rotatlon about a horlzontal ~x19 extend~ng transver~e to the d~rection of travel of th~ m~chlne. The r~c~almer drum ~s drlven from a power take-o~f vl~ a gear box, clutch and pulley and belt drive ~n the dlrect~on lndlcated by the 2 ~ l~ 9 ~ ~ L¦
wos~/l07s2 - 4 - PCT/AU90/00l09 arrows 17 so that as the reclalmer advances ~orwardly along a paved road surface 20, the reclalmer drum cuts downwardly lnto the road surface to cut pavlng material from the road surface and to pass the cut material rearwardly of the direction of travel beneath the drum. The downward cuttlng actlon ensures that large pleco~ of paYlng are not llfted from the road surface but pieces are cut progressively to a generally small slze determlned by the spaclng of the cutters around the drum. The ~rum and ~utters al~o act to pulverize the cut material to som~ extent as it pass~s under the drum.
Paving material eut ~rom the paved road surface and passing rearwardly beneath the drum ls collected ~y a bucket elevator denoted generally as 21 whlch llfts the materlal rearwardly and upwardly to dlscharge it lnto a pulvertzer denoted generally as 22 which 19 mounted on the maln machine frame structure 1 behlnd and above the reclalmer drum 14.
Bucket elevator 21 compri~es a series o~ bucXet~ 30 ~ixed to drive chalns 2~ extending ~round lower idlor sprock~ts ~4 ~nd drive sprockets ~S ~riven ~rom a hydr~ullc mo~or ~6. Th~
bucket assembly 1~ disposed wi~hin ~n ~levator houslng ~7 havlng a bottom lnlet openlng 28 ~nd an upper dlscharge openlng 29. The lower end o~ houslng 27 ls formed wlth a downwardly and forwardly pro~ectlng scoop extenslon 31 to scoop up the cut materlal and dlrect lt lnto the elevator openlng Z8 whence ~t is llfted by the buckets 30 to the top of the elevator houslng and dlscharges through the openlng 29 lnto the pulverlzer 22.
Pulverlzer 22 may be constructed as a conventlonal pug mill. It comprises a sturdy steel pulverlzlng vessel 32 with top hatches 33 and a bottom discharge opening 34 a~ the rear end of the vessel 32. The pul~erizlng vessel deflnes a rec~angular pulverizing chamber in which are mounted two contr~-rotatlng paddle assemblles 35. The paddle assemblles compr~se paddle arms 36 radiatlng out from two parallel paddle ,~ sha~ts 37 extending through the pulverlzing chamber ln the front to rear d~rect~on. In the mid part o~ the pulveri2ing ; chamber the paddle arms o one assembly pro~ect between the arms of the other assembly and the two sets o~ paddle arms are contra-rotated as indlcated by the arrows 38 by the operation ~, ` ' ' , ' `, ' ' . ` ~ ~ . ' ` ' ` ' . ~'' ~ ' ' ' ' ' . .
WO90/1Q7~2 _ 5 _ 2 ~ Ot3~ pcT/Auso/oo1o9 of a hydraulic motor ~9 mounted at the rear of the pul~erizer vessel and drlving the shafts 37 through a belt drive 41. The action of the paddles on th2 reclaimed road mat~rlal delivered into the pulverizing chamber is to mlx the material and to move it progressively to the rear of the pulverlzing chamber toward the bottom discharge outlet 34.
The ~eclalmed paving material ln the pulv~rlzer ~2 ls mlxed with a llquld binder ln the form of a water and bltumen emulsion sprayed into the pulverizer chamber through a plpe manifold 42 exte~dlng through th~ upper part of the chamber rearwardl~ from the lnlet and provided with sprays 43. The emulslon is supplied to the plpe manlfold from a tank 45 mounted on the machine frame structure 1 or ~rom a separate tanXer driven ~n front of or beslde the reclaimer. An auxlliary water supply manifold 44 also extends through the upper part of the pulverlzer chamber. Ad~iltlonal water can be spr~yed into the pulverlzer chamber through this auxlllary mani~old when necessary to lncrease the moiqture con~ent o~ the mixture lea~ing the pulverizer.
The pulverized mlxturo o~ r~claim~d ro~d m~teri~l and .
emulslon dropR through thc pul~er~z~r outlct 34 into ~ surge bin 51 whi~h 19 mounted on the main machine structure 1 lmmedlately below the pulverlzer. ~in 51 has uprlght front and rear walls 52, 53 and sld~ walls S4 which slope laterally lnwardly of the machlne to a bottom outlet 55. A belt conveyor 56 extends across the bottom outlet 55 of the bln ln the front to rear directlon of the ma~h~ne. Conveyor 56 comprl3es a con~eyor belt 57 mounted on front and rear rollers 5B, 59 and the ~ront rollers are drlveable by an ~nternal hydraulic motor 60 to drl~e the con~eyor belt ln forward and reYerse directions. When the conveyor belt ls drlven ln the forward d~rection ~t transports mater~al ~rom the bottom of the surge bln 51 forwardly of the machlne and drops ~t onto the road surface 40 ~rom whlch pavlng materlal has been removed by the reclalmer 14. The ~ront wall 52 of b~n 51 carr~es a vertlcal sllde plate 61 whlch can be ralsed and lowered by operatlon of a hydraulic ram 62 to ~ary the rate o~ ~eed o~ materlal ~om the b~n when the conveyor i~ operated to dl~charge mater~al .. 1`., '., WO90/10752 - 6 _ 2 ~ o ~ 4 PCT/AU90/00109 forwardly from the bin.
When conveyor 57 is ~perat~d to convey materlal forwardly from the ~in it discharges the materlal o~to the road surface 40 in advance of ~ screed assembly 63 dlsposed beneath the conveyor 57 and mounted on th~ machlne structure 1 vla a pair of plvot arms 64. The ~creed ~ssembly comprlses a pair of splral ~ugers 65 extendlng transversely of the machlne and a screed plate 66 wlth an upturned l~adlng edge 67 extendlng across the machine lmmediately behlnd the augers 65. The augers are driven independently o~ one another through internal hydraulic motors so as to spraad the materlal depo~ited into a wlndrow by conveyor 57 across the road surface before lt is finally consolldated a~d smoothed by the actlon of the screed plate 66. The screed assembly slmply hangs under lts own welght on plvot arms 64 to level the deposlted materlal. The angle of attack of the screed can be varled by rals~ng and lowering the ~orward ends of the plvot arms 64 by th~ operation of a pair of hydraulic ram~ 71. Th~ lowor ~nds of rams 71 arc pivotally attached to lugY 72 ad~acent the ~ront ond~ o~ p~vot arms 64 whlch are provld~d wlth pins 73 on~ging vextical ~lide ~.
bars 74 fixed to the main machlne ~tructure 1. The front ends of plvot bar 74 are thus held at a height dependant on the settlng of rams 71 and are free to pivot about the pivot connections 72 but the substantlal drag foxc~s applled to the arms 64 are transmltted to the machlne frame vi~ the pins 73 and bars 74. Two addltional hydraullc rams 75 are connected between the machlne fr~me and the screed ~ssembly so as to be operatlve to llft the screed assembly well away from the road surface for tra~sport.
The rear wall 53 of surge bln 51 ls provided wlth a rearwardly openlng gate 81 to allow rapld dlscharge of materlal from the rear of the ~ln by reverse operatlon of conveyor 57.
~aterlal may thus be dumped dlrectly ln a plle or wlndrow behlnd the machlne or may be dlscharged lnto an elevator brought up to the rear of the machlne to transfer th~ materlal lnto another vehlcle for transport to another locatlon.
. :' ' , ' " ' ' ' ., , ' .: , ,, ' , ~ " ~
WO90/107~2 7 2 ~ fi ~ PCT/AU90/00l09 A palr o~ wlng platforms 82 pro~ect ~rom the rear of the screed assembly. An operator may s~and on on~ ~f th~se platforms to malntain lnspectlon of the ~lnished surf~ce of the recycled materlal. Remote controls may be provlded at thl~
locatlon for control o~ the conveyor 57, feed rate ad3ustment sams 62 and the screed ad~ustment rams 71.
-- Surge bln ~1 has suf~lclent capac~ty to carry an amount of pavlng materlal whlch ls cut ~rom a length of a paved road sur~ace equal to the dlstance ~etween the reclnimer dr~n 14 and the 3creed assembly 63. ~his e~abl~s materlal to be carrled forward at the commencement o~ a reclalming run untll lt can be deposited on that part of tbe road from which materlal has been removed. In conventlonal machlnery without the pro~lslon of such a surge bln, the removed material must be deposlted contlnuously and at the commencement of a Tun the ; material ls therefors dumped onto an unreclalmed part of the road and must be subsequently collected. The bln capaclty should be sufficient to accomodate materlal cut ~xom a road with a paving khicXness up to about 150 mm. A typical machine may have a cut~lng width o~ two metres and an e~ective distance between the reclalme~ and thfl ~cre0d o~ about 3.3 metres. For a pa~ement thickness of 150 ~n the minlmum capaclty requirement would be about ~.22 tonnes ln whlch case the bin may typically have a capaclty of about 3 tonnes.
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Claims (13)
1. A road surface recycler comprising:
a mobile structure mounted on ground engaging means adapted to support the mobile structure for movement across the ground whereby the structure can be advanced along a paved road;
a paving material reclaimer mounted on the mobile structure and operative when the mobile structure is advanced along a paved road to cut road paving material from the surface of the road;
a pulverizer mounted on the mobile structure to receive road paving material cut from the road by the reclaimer; and delivery means to deliver pulverized material from the pulverizer onto the road surface from which paving material has been removed by the reclaimer.
a mobile structure mounted on ground engaging means adapted to support the mobile structure for movement across the ground whereby the structure can be advanced along a paved road;
a paving material reclaimer mounted on the mobile structure and operative when the mobile structure is advanced along a paved road to cut road paving material from the surface of the road;
a pulverizer mounted on the mobile structure to receive road paving material cut from the road by the reclaimer; and delivery means to deliver pulverized material from the pulverizer onto the road surface from which paving material has been removed by the reclaimer.
2. A road surface recycler as claimed in claim 1, wherein the road surface reclaimer comprises a rotary drum fitted with cutting elements around its circumference and mounted on the mobile structure for rotation about a generally horizontal axis transverse to the direction of travel of the recycler and reclaimer drive means operative to drive the drum in such a direction as to cut downwardly into the surface of the road so that paving material cut from the road surface is passed rearwardly of the direction of travel beneath the drum.
3. A road surface recycler as claimed in claim 2, wherein the pulverizer has an inlet for material to be pulverized disposed rearwardly and upwardly from the cutting drum of the reclaimer and there is mounted on the mobile structure an elevator to receive reclaimed paving material passed rearwardly under the reclaimer drum and to transport that material to the pulverizer inlet.
4. A road surface recycler as claimed in any one of the preceding claims, wherein the mobile structure also carries a binder applicator for applying a liquid binder to the reclaimed material within the pulverizer so that the binder will be mixed with that material as it is pulverized.
5. A road surface recycler as claimed in any one of the preceding claims, wherein the mobile structure also carries a bin to receive pulverized material from the pulverizer and the delivery means comprises a conveyor operable to transport pulverized material from the bin and to deliver it onto the road surface.
6. A road surface recycler as claimed in claim 5, wherein the conveyor has drive means operable to drive the conveyor at variable speeds.
7. A road surface recycler as claimed in claim 5 or claim 6, wherein the mobile structure carries a screed to spread pulverized material delivered by the conveyor onto the road surface.
8. A road surface recycler as claimed in claim 7, wherein the bin is of sufficient volume to carry an amount of reclaimed and pulverized material reclaimed from a paved road surface of mm paving thickness over a length of road equal to the distance between the reclaimer and the screed.
9. A road surface recycler as claimed in claim 7 or claim 8, wherein the conveyor is operable normally to deliver pulverized material from the bin to the road surface ahead of the screed but is alternatively operable to discharge pulverized material from the bin from the rear of the recycler.
10. A road surface recycler as claimed in any one of claims 5 to 9, wherein the conveyor is a belt conveyor extending across an opening in the bottom of the bin in the fore and aft directions with respect to the direction of travel and is normally operable to feed pulverized material from the bottom of the bin forwardly and to discharge that material from the forward end of the conveyor onto the road surface but is alternatively operable in a reverse direction to discharge pulverized material from the rear of the conveyor.
11. A road surface recycler as claimed in claim 10, wherein the bin is provided at the front of said bottom opening with a raisable and lowerable slide to adjust the rate of forward feed of the pulverized material on the conveyor.
12. A road surface recycler as claimed in claim 10 or claim 11, wherein the rear of the bin has a door which is openable to increase the rate of rearward discharge of pulverized material in reverse operation of the conveyor.
13. A road surface-recycler as claimed in claim 1, wherein the road surface reclaimer comprises a rotary drum fitted with cutting elements around its circumference and mounted on the mobile structure for rotation about a generally horizontal axis transverse to the direction of travel of the recycler and reclaimer drive means operative to drive the drum in such a direction as to cut downwardly into the surface of the road so that paving material cut from the road surface is passed rearwardly of the direction of travel beneath the drum;
the pulverizer has an inlet for material to be pulverized disposed rearwardly and upwardly from the cutting drum of the reclaimer and there is mounted on the mobile structure an elevator to receive reclaimed paving material passed rearwardly under the reclaimer drum and to transport that material to the pulverizer inlet;
the pulverizer is disposed above a bin mounted on the mobile structure to receive pulverized material from the pulverizer; the mobile structure carries a screed disposed generally beneath the pulverizer and the bin; and the delivery means comprises a belt conveyor extending across an opening in the bottom of the bin in the fore and after directions with respect to the direction of travel between the bin and the screed and is normally operable to feed pulverized material from the bottom of the bin forwardly and to discharge that material from the forward end of the conveyor onto the road surface ahead of the screed but is alternatively operable in a reverse direction to discharge pulverized material from the rear end of the conveyor behind the screed.
the pulverizer has an inlet for material to be pulverized disposed rearwardly and upwardly from the cutting drum of the reclaimer and there is mounted on the mobile structure an elevator to receive reclaimed paving material passed rearwardly under the reclaimer drum and to transport that material to the pulverizer inlet;
the pulverizer is disposed above a bin mounted on the mobile structure to receive pulverized material from the pulverizer; the mobile structure carries a screed disposed generally beneath the pulverizer and the bin; and the delivery means comprises a belt conveyor extending across an opening in the bottom of the bin in the fore and after directions with respect to the direction of travel between the bin and the screed and is normally operable to feed pulverized material from the bottom of the bin forwardly and to discharge that material from the forward end of the conveyor onto the road surface ahead of the screed but is alternatively operable in a reverse direction to discharge pulverized material from the rear end of the conveyor behind the screed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPJ325689 | 1989-03-16 | ||
| AUPJ3256 | 1989-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2049064A1 true CA2049064A1 (en) | 1990-09-17 |
Family
ID=3773789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002049064A Abandoned CA2049064A1 (en) | 1989-03-16 | 1990-03-16 | Road surface recycler |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR920701571A (en) |
| CA (1) | CA2049064A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6626608B2 (en) | 2000-10-16 | 2003-09-30 | Jerry Olynyk | Mobile rock crusher |
| CN113356002A (en) * | 2021-06-23 | 2021-09-07 | 梁桂清 | Repairing method for highway pavement maintenance |
| WO2022008798A1 (en) * | 2020-07-09 | 2022-01-13 | Betolar Oy | Apparatus and method of treating soil |
| CN114197285A (en) * | 2022-01-07 | 2022-03-18 | 张俊杰 | Construction equipment is smashed on town road surface |
-
1990
- 1990-03-16 CA CA002049064A patent/CA2049064A1/en not_active Abandoned
- 1990-03-16 KR KR1019910701124A patent/KR920701571A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6626608B2 (en) | 2000-10-16 | 2003-09-30 | Jerry Olynyk | Mobile rock crusher |
| WO2022008798A1 (en) * | 2020-07-09 | 2022-01-13 | Betolar Oy | Apparatus and method of treating soil |
| CN113356002A (en) * | 2021-06-23 | 2021-09-07 | 梁桂清 | Repairing method for highway pavement maintenance |
| CN114197285A (en) * | 2022-01-07 | 2022-03-18 | 张俊杰 | Construction equipment is smashed on town road surface |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920701571A (en) | 1992-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19930916 |