CA2129718A1 - Metering device for solid materials - Google Patents
Metering device for solid materialsInfo
- Publication number
- CA2129718A1 CA2129718A1 CA002129718A CA2129718A CA2129718A1 CA 2129718 A1 CA2129718 A1 CA 2129718A1 CA 002129718 A CA002129718 A CA 002129718A CA 2129718 A CA2129718 A CA 2129718A CA 2129718 A1 CA2129718 A1 CA 2129718A1
- Authority
- CA
- Canada
- Prior art keywords
- rotor
- metering device
- metering
- process according
- dosing
- 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
-
- 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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
- B65G53/4608—Turnable elements, e.g. rotary wheels with pockets or passages for material
- B65G53/4616—Turnable elements, e.g. rotary wheels with pockets or passages for material with axis of turning parallel to flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
- B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
- B28C7/163—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump
- B28C7/165—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump using a fluid, e.g. gas
- B28C7/166—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump using a fluid, e.g. gas comprising a lock rotor with pockets for feeding determined quantities of material from a hopper into the driving fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Nozzles (AREA)
- Basic Packing Technique (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- External Artificial Organs (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A metering device for pneumatic metering of solid materials in accordance with the rotor principle, wherein a special rotor seal is employed.
A metering device for pneumatic metering of solid materials in accordance with the rotor principle, wherein a special rotor seal is employed.
Description
QUG 05' 94 04: 27PM BDS~M P . 4 METERING ~E~ICE FOR 80LID ~TERIALS
FIEL~ 5UL~Li_LXZ~i~52~
The ~nvention relat~3 to a m~torlng device, partioularly one ~or meterlng solid material~.
~K~RO~D OF T~E ~
In ~od~rn tunnel and gallery con3~ruction, gr~at dem~nas are ~ade on ~praying concre~e with re6~eo~ to the a~oelorating admlxture (also ref~rred to ae scttlng ~ccelerator or ~ust ~ccel~rator) and early ~ett~ng in ; conn w tion with advanee head~ hg and regardlng the final ~trength rOr pre-l~ning w~rk (new ~u~trlan tunn~l conRtrUction metho~ w~11 a~ for ~inal conoretlng.
A high ~nd even quality of 6praying conorete requiree a special concrete quality and exact matchlng o~
the acceleratlng admixture, other addittv~4 and the U8~
o~ ~ulta~le aggr~gates. Tha demand~ made c~n only ~e ~ct lr an optimal co~po-ition of the~e oompon~nts i~
maintained.
i ao lncreasingly de~andlng pro~ect~ ln tunnel and below-~ gr~de con~truction undor di~lcult qeologlcal condltlon3 3 and with hlghly mechanized m~thodc o~ advanclng notiaeAbly raqulre added 6poclal ~truCtUrAl ~upport e~or~.
~ho proee~3e~ ~nown Por this con~tructlon method ar~
the dry and th~ wet ~pray ~ethods. ~he dry 8pr~y mothod oporat~ in aocordance with th~ thin ~low prlnclple, the ~UG 5 ' 94 16: 37 PQGE. 004 FIUG E15 '94 E14: Z7P~1 Bl:lS~i~l P. 5 2~29718 wat ~pray mQthod in AccordancQ with elther th~ thin or : th4 dense ~low principles.
Aee~lerating admixtureæ $h liquid a~ well ag powder form are used ih both method~. The d~mand~ ~ade on the ~pr~ying concret~ have steadily incrQa~ed ih connection with producin~ ~praying concrete which i8 imperviou~ to w~ter, ex~r~mely sta~lo or ~eez~-/da-lcing 621t-reslstant, par~icularly for the construction o~ ~ingle hell tunnol tube~. -lo Chemleal~ have bRen u~ed ao accsl~rating admix~ures for deeades. ~owever, thi~ does not mean th~t every ~praying eoncrete mu~t contain ~uch accelerating admixtures. sut ~any applicationa oould not be ~ade without acceleratlng admixtura~, ~uch as s~alin~ work, repalrs, appllcation o~ eoncrete layer~ ~hat ~re rapidly ~apable of bearing, Ya~ty in ~ining and many more.
For ths ~ake o~ completen~c~ it i~ al60 n~cs~ary to montion additiYe~ whlch have l~s~er aecelerating efre~t6.
Be~t ~nown i3 the ~ployment Or ~ilica fume in com~ted, non-compaoted or ~lurry for~. In plaoe a~ ellica ~ume it 1~ al~o possi~le to employ synth~tically produced ~morphou4 Sillcic aeld. Combination3 o~ e~ ~ume with watQ~-redueer~, hig~-range water reducer~, retardant~ or aee41arators solve so~a p~obl~ms in ~onstructlon.
~5 Liguld Ad~ixtUrQs o~er gr~at advantage~ becau3e thoy need not b~ added to the m~xing water until the ~azzl~ us th0y do not rQact Uhtil they ~r~ needed.
B~oau~e Or homogon~ous dlstributlon it i~ posslble to i~UG 5 '94 16:37 P~GE.005 ~UG 05 ' 9':1 0J: 28Prl BDS~l P . 6 work wlth ~m~ller ~mounts, ~o that the lo~s o~ 3ta~ y i~ corre~pondlngly smaller. Meterlng o~ liqui~
admi~turos is ~es~ per~ormed by m~ans o~ ad~ustable matering pumps. Pre~sur~ tanks are les~ suitable.
; 5 Sp~cial probl~ms arl~e only in connection wlth met~ring pulv~ulent admixture6.
So that lt i8 po~sible to work wit~ the emallegt po~slble metering, pulvgrul~nt admlxtures should be .~ homogenQou31y di6~rlbuted in the mixture. The constant lo and even mQtering of pulve~ulen~ accelerating agents i3 di~ioult. I~ the ac~elerating agent ls premixed with the c~m~nt~and mlxture, whlch always containe a certain : proportion o~ mol~tur~, pre-hydration with the oemont take~ plnc~ and a part of th~ e~feat i9 thereby 103t.
. 15 An ~ctual met~ring teahniqu2 for pulverulent !i', additiv~ con~iet6 o~:
:~, a. admixing by hand, ~ b. m~chanical ~etering by mean~ Or:
.I m~teri~g screw, vibrating m~tering devlce, ¦ 20 pn~umatlc conveylng trough, b~l~ meterlng d-vice, ~tar wha-l lock, chamber m~t~ring d~vice, turntabl~ metering devlc~, meterlng 1 slide, pi3ton mat-ring dev~ce, .j! ¢. by means o~ one or two pre3sure chamber~.
~S Most of th~ mQthods oper~t~ di~continuou~ly ~nd not eynchronoual~ with th- e~ectlon o~ eprayed mortar or ~' ~praying concr~te ~rom th~ conveying maahine. They are v~ry di~riUlt to oontrol and re~ulate, tend to -, . ~
RUG 5 ' 94 i6: 38 PRGE. 006 q ?
RUG 05 ' 94 04: Z8PM BDS81M P 7 malfunction and a~ ~ rule are very cost- lntensive ~nd therefora uneconomlcal.
,, O~ECTS AND ~R~ OF T~E~INVENTIO~
' It 15 the ob~ect of the prQsent invention to d~vslop a meterlng device ~or pulverulent ~dmixture and/or additives for use with all ~prayed mort~r or spraying concrete methods which oper~te~ continuously, ynchronou31y with the conveyed amount o~ the 6pr~yiny machine, $g contlnuously ad~u6t~ble, rug~ed and economlcal. Admixtures are agents which ~hemically ndlor physically react w$th e.g., c~nt. Addltlveq are I inert or latent hydraullc materials.
; Thi~ ob~ct is attain~d by employing a çonvaylng ' ~achine operatlng in accord~nce wlth the proven roto~
¦ 15 prlnciple, known ~rom the rield of spraying concrete.
~ To a~ure the homogehe~us dl~tribution oP
i pulvorul-nt a~mlxture6 And/or addltlve3, in par~lcular in the mat-rial to be Qprayed, it i6 nece3~ary to meter tho3e materlals and Add them to the low of matQrial ~nd/or air. Sinc~ ~hls t~ke place under ovsrpressu~e, probl~me arise in 6eallng the mQtering device. These probl-m~ Are re601ved by m~an~ Or the me~aring device of the lnv~nt~on.
Beaa~s~ only r~6pectively ons ahamber 1~ opened to th~ oonvaying l~ne which 1~ under pressurs and the ; meterlnq araa oth~rwl~Q 13 seAled agaln_t pressur~, lt b~comes po~lble to meter solld ~at~rlatB pneumat~oally fiUG 5 ' 94 16: 3~ PRGE. 007 ~WG 05 ' 94 04: 2E~P~1 BDS8tt1 P . 8 2~29718 into a conYeylng line at opera~ing pre3~ure~ o~ more than : 10 bar, o~ten eVsn more than 100 bar. W~th pumped concr~t2, ~or QX~mple, presgurBs of up to 300 bar a~e ~easured at the pump.
B The m~taring devlcQ li~ particularly 4ult~d for adding meter~d amount~ of pulverulent addl~lve~ to cement-containing bullding material6, ~or ~xample. Such admlxtures are, ~or ~xample, accelerators, ~ilica ~ume and~or Amorphou3 ~ilicic acid.
The d~vica i~ ~artlcularly 5uited for add1 ng 5mall metered amount~, pre~erably ~p to 10% ln relatlon ~o the binder.
The metering d~vic~ of ~h~ invention can be op~rated as a separate devica or bullt as an added unit on a lS conveying machln~. The synchronous control With ~he aonv~ying machin~ can tako plac~ mecbanloally A~ W~ll a slRctrlcally.
Uniting Or the admixture or additiv0 ~low with thc ;~ a~r or convey$ng ~low ig accompli~hed by means o~ Y-~h~ped transfer pieCes. speclal expenslve inj~ction noziles are not regulred.
~he metsring devlce of the invention can al~o be employ-d, ln partia~lar, for meterinq of pulverulent ~, ~olld materl~ls in tbe production o~ mixture~, ~uah ¦ Z~ th~ production o~ pumped concreto, dry mortar, ` d-tergent6, oheri=al proouot~, to.
--S--flUG 5 ' 94 16: 39 P~GE. 008 ~IUG 05 'g4 04:Z9P11 BD5811 P 9 - 212~7~8 Fig. 1 de~cr~be~ the rotor prlnc4ple, Fig. 2 ~how~ a pre~er~ed embodlment o~ the metering d~vice of the lnventlon, Fig. 3 shows metering of the powd~r direotly at the GonVeying flow outlet (dry ~pray4n~ method), Fig. 4 ~hows metering o~ th~ powd~r at an arbi~rary point i~ tho c~nveying flow (~ry ~praying method), ' ,:
.~: Fig. 5 ~how~ m~tering o~ the powder at an ~rbitrary - point ln the Conveying flow (wet ~praylng method - thin . ~low), . . .
,J~ 15 Fig. 6 ~hows met~ring of the powder in the oonveying ~low (w~t epraying m~hod - dense flow~.
LE~ ~E$CRIP~QN OF THE PREFERRED EMBODI~ENTS
Op~r~t~on aocording to the rotor principla 4 B
de~cribc~d $n F4g. 1. rrh- conveyed ~natter reao~es the rotor chamber 3 vla the ~ller opening 11, Wh4ch u~ually i~ e~uipp~d with a ~ unnel 1. The turnlng rotor 2 ` transport~ the materlal to th- blow-out chamber 4, ~rom y Wh4ch thc m~torial ~o b~ sprayed or conveyed ent~rs the 2~ conV~ying rlow 5 4n ~reo ~all ~nd aided by the alr 7 at the top. ThQ material i9 tran~orted in a hose or p4pe line by msan~ o~ conv~yin~ air 6 to th~ noz21c~
QUG S 'Y4 16:39 P~GE.0~9 F3U6 05 ' 94 04: Z9PI~1 BDS~M P . 10 212~718 In a met~ring device in accord~nce w~th th~
inventlon whl~h is particularly suited for golld material~, meterlng take~ plaae ~neumatlcally by means of A rotor. To ~a~e posclbl~ metering against overpre~surR, the rotor 2 i6 ~ealed by statlonary ~lid$ng counterparts 8, 10.
Thia seal ~an be achieved by uslng a ground-in rotor 2, sealod on the top and ~ottom pr~fer~bly by ground-ln sealing plates 8, lo. Preferably a~ le~t one Or the lo ground-in parts, ror exampl~ the sealing pl~tes 8, lo, i sur~ac~-har~ened. The slldlng count~rpart~, partlcularly seAllng plat~s B, 10 can bs mad~ of metal, o~ a cera~ic matorial, or a combination thereo~.
Also, the seallng plate~ ~an b~ ~ade of polymer$o materi~ls, pra~srably r~infor~ed polymerio ~ateri~ls.
For b~tter presgure ~ontrol, in a partlcularly pr~e~r~d 2mbodl~ent the rotor 2 1~ enca~ed ln a pre~sure-proof houslng 9.
Tho rotor drive 12 can extend on both Qide~ ou~ o~
the possibly ~pe~ially 3ealsd rotor area, wherQin a ~ixing devioo can be provid~d ~or tha material to ~e filled lh and metered on ths fill~r side. Howover, a rotor drlve 12 which e~orge6 ~rom th~ sealed rotor are~
only on the dri~e slds a~ shown ln Fig. 2 is pre~srred 25 ~or r~asonB of ~e~ling.
Such a met~rlng device which is 6uitable for 6011d materlal~ in partlcular, comp~isas a ro~o~ 2 and a -aling platH 10 prov~ded wit~ at least ons Eille~
PUG 5 '94 16:39 PhEiE.~310 fiUG 05 '94 04:Z9PM BDS~M 21 2 9 71 8 P 11 .
openlng 11, which 1s d~rectly oonnected with at lsa~t one rotor chamber 3. ~ha at least one rotor ohamber 3 i~
connect~, displaced with respect to ths filler opQning 11, with a blow-out chamber ~ and a 6upply line for the tcp air 7, wherein the supply line ~or the top alr 7 ~nd the ~olow~ out cha~ber 4 a~e dl~posed on opposite side~ o~
the rctor chamber 3. So that metering can take plaoe against overpressure, the rotor 2 is sealQd again~t the tatlonary al1ding counterparts 8, lo. To ~ssure good conveying of the conveylng ~low 5, a supply line ~or aonvQying air 6 ~s provided in the blow-out chamber 4.
The preferred embodlment o~ the metering device ln aa~ordance with the invention ~ho~n in Flg. 2 indlcat~s that the problem wae ~olved ~y encapsulating the rotor 2 in ~ prss~ur0- proo~ housing 9 as ~ell a~ by employing a ground-ln rotor ~, whioh 1~ sealed At the top and bottom by mean~ of sur~ace-harden~d and ground-in eeallng plate~
8, 10.
ThQ ~etering deYice can ha~e a plurallty o~ ~1116r ¦ ao openinge 11 o~ dl~Ça~ent ~i~es, ~o that me~er~ng can be controlled not only by ~eans o~ the ~peed of rotation, but also by means o~ the rs~pectiv~ rlllln~ or blown-out volu~.
Th- ~tatlonary ~llding counterpdrt~l in partl~ular ! 2~ sealin~ she2ts, are preferably made o~ ~etal or æpecial ', ceramic materialæ.
Aæ noted abo~, Fig. 3 and ~ig. 4, lll~strat~
embodlm-nt~ o~ the lnvehtion a~sooiated with the dry ~UG 5 '94 16:40 P~GE.011 I~UG 05 ~94 04::3E~PM ~DS~,M P.12 , 6pray~g method. A~ illustrated in F~g. 3, pulverul~ht ~olid mat~riAl can be added to th~ ro~or mstering d~vico along wlth co~pr~ssed alr which 1~ al~o addQ~ to the dry Qpray~ng mac~ine. Th~ dry 6p~aying mA~hine and rotor met~ri~g devi~e are ~ynchronou~ly aon~rolled, and ~he powdQr is met~red directly a~ the conv~ying ~low outlet.
Water and additiYes ~re add2d, optlon~lly under high : pr~sure, at the noz~le.
Flg. 4 illustrates a 8imllar embodlm~nt exc~pt the lo powder is me~er~d at an a~bitrary poin~ in the conveyiny ~low.
Fig. 5 and Flg. 6 illu~trat~ embodimerlt3 involvlng synchronous con~rol of th~ ~praying machlne and rotor mQtering dG~rice, but in connectlon with the wet sprayinS~
method. Pig. 5 illustrate~ m~ering powd~r at an atbitrary point of the conveying flow ln ~ thin flow tochnigue. ~ig. 6 lllu~trntus a dun~a rlow t-chnlquc.
~, ' RUG 5 '94 16:40 PRGE.012
FIEL~ 5UL~Li_LXZ~i~52~
The ~nvention relat~3 to a m~torlng device, partioularly one ~or meterlng solid material~.
~K~RO~D OF T~E ~
In ~od~rn tunnel and gallery con3~ruction, gr~at dem~nas are ~ade on ~praying concre~e with re6~eo~ to the a~oelorating admlxture (also ref~rred to ae scttlng ~ccelerator or ~ust ~ccel~rator) and early ~ett~ng in ; conn w tion with advanee head~ hg and regardlng the final ~trength rOr pre-l~ning w~rk (new ~u~trlan tunn~l conRtrUction metho~ w~11 a~ for ~inal conoretlng.
A high ~nd even quality of 6praying conorete requiree a special concrete quality and exact matchlng o~
the acceleratlng admixture, other addittv~4 and the U8~
o~ ~ulta~le aggr~gates. Tha demand~ made c~n only ~e ~ct lr an optimal co~po-ition of the~e oompon~nts i~
maintained.
i ao lncreasingly de~andlng pro~ect~ ln tunnel and below-~ gr~de con~truction undor di~lcult qeologlcal condltlon3 3 and with hlghly mechanized m~thodc o~ advanclng notiaeAbly raqulre added 6poclal ~truCtUrAl ~upport e~or~.
~ho proee~3e~ ~nown Por this con~tructlon method ar~
the dry and th~ wet ~pray ~ethods. ~he dry 8pr~y mothod oporat~ in aocordance with th~ thin ~low prlnclple, the ~UG 5 ' 94 16: 37 PQGE. 004 FIUG E15 '94 E14: Z7P~1 Bl:lS~i~l P. 5 2~29718 wat ~pray mQthod in AccordancQ with elther th~ thin or : th4 dense ~low principles.
Aee~lerating admixtureæ $h liquid a~ well ag powder form are used ih both method~. The d~mand~ ~ade on the ~pr~ying concret~ have steadily incrQa~ed ih connection with producin~ ~praying concrete which i8 imperviou~ to w~ter, ex~r~mely sta~lo or ~eez~-/da-lcing 621t-reslstant, par~icularly for the construction o~ ~ingle hell tunnol tube~. -lo Chemleal~ have bRen u~ed ao accsl~rating admix~ures for deeades. ~owever, thi~ does not mean th~t every ~praying eoncrete mu~t contain ~uch accelerating admixtures. sut ~any applicationa oould not be ~ade without acceleratlng admixtura~, ~uch as s~alin~ work, repalrs, appllcation o~ eoncrete layer~ ~hat ~re rapidly ~apable of bearing, Ya~ty in ~ining and many more.
For ths ~ake o~ completen~c~ it i~ al60 n~cs~ary to montion additiYe~ whlch have l~s~er aecelerating efre~t6.
Be~t ~nown i3 the ~ployment Or ~ilica fume in com~ted, non-compaoted or ~lurry for~. In plaoe a~ ellica ~ume it 1~ al~o possi~le to employ synth~tically produced ~morphou4 Sillcic aeld. Combination3 o~ e~ ~ume with watQ~-redueer~, hig~-range water reducer~, retardant~ or aee41arators solve so~a p~obl~ms in ~onstructlon.
~5 Liguld Ad~ixtUrQs o~er gr~at advantage~ becau3e thoy need not b~ added to the m~xing water until the ~azzl~ us th0y do not rQact Uhtil they ~r~ needed.
B~oau~e Or homogon~ous dlstributlon it i~ posslble to i~UG 5 '94 16:37 P~GE.005 ~UG 05 ' 9':1 0J: 28Prl BDS~l P . 6 work wlth ~m~ller ~mounts, ~o that the lo~s o~ 3ta~ y i~ corre~pondlngly smaller. Meterlng o~ liqui~
admi~turos is ~es~ per~ormed by m~ans o~ ad~ustable matering pumps. Pre~sur~ tanks are les~ suitable.
; 5 Sp~cial probl~ms arl~e only in connection wlth met~ring pulv~ulent admixture6.
So that lt i8 po~sible to work wit~ the emallegt po~slble metering, pulvgrul~nt admlxtures should be .~ homogenQou31y di6~rlbuted in the mixture. The constant lo and even mQtering of pulve~ulen~ accelerating agents i3 di~ioult. I~ the ac~elerating agent ls premixed with the c~m~nt~and mlxture, whlch always containe a certain : proportion o~ mol~tur~, pre-hydration with the oemont take~ plnc~ and a part of th~ e~feat i9 thereby 103t.
. 15 An ~ctual met~ring teahniqu2 for pulverulent !i', additiv~ con~iet6 o~:
:~, a. admixing by hand, ~ b. m~chanical ~etering by mean~ Or:
.I m~teri~g screw, vibrating m~tering devlce, ¦ 20 pn~umatlc conveylng trough, b~l~ meterlng d-vice, ~tar wha-l lock, chamber m~t~ring d~vice, turntabl~ metering devlc~, meterlng 1 slide, pi3ton mat-ring dev~ce, .j! ¢. by means o~ one or two pre3sure chamber~.
~S Most of th~ mQthods oper~t~ di~continuou~ly ~nd not eynchronoual~ with th- e~ectlon o~ eprayed mortar or ~' ~praying concr~te ~rom th~ conveying maahine. They are v~ry di~riUlt to oontrol and re~ulate, tend to -, . ~
RUG 5 ' 94 i6: 38 PRGE. 006 q ?
RUG 05 ' 94 04: Z8PM BDS81M P 7 malfunction and a~ ~ rule are very cost- lntensive ~nd therefora uneconomlcal.
,, O~ECTS AND ~R~ OF T~E~INVENTIO~
' It 15 the ob~ect of the prQsent invention to d~vslop a meterlng device ~or pulverulent ~dmixture and/or additives for use with all ~prayed mort~r or spraying concrete methods which oper~te~ continuously, ynchronou31y with the conveyed amount o~ the 6pr~yiny machine, $g contlnuously ad~u6t~ble, rug~ed and economlcal. Admixtures are agents which ~hemically ndlor physically react w$th e.g., c~nt. Addltlveq are I inert or latent hydraullc materials.
; Thi~ ob~ct is attain~d by employing a çonvaylng ' ~achine operatlng in accord~nce wlth the proven roto~
¦ 15 prlnciple, known ~rom the rield of spraying concrete.
~ To a~ure the homogehe~us dl~tribution oP
i pulvorul-nt a~mlxture6 And/or addltlve3, in par~lcular in the mat-rial to be Qprayed, it i6 nece3~ary to meter tho3e materlals and Add them to the low of matQrial ~nd/or air. Sinc~ ~hls t~ke place under ovsrpressu~e, probl~me arise in 6eallng the mQtering device. These probl-m~ Are re601ved by m~an~ Or the me~aring device of the lnv~nt~on.
Beaa~s~ only r~6pectively ons ahamber 1~ opened to th~ oonvaying l~ne which 1~ under pressurs and the ; meterlnq araa oth~rwl~Q 13 seAled agaln_t pressur~, lt b~comes po~lble to meter solld ~at~rlatB pneumat~oally fiUG 5 ' 94 16: 3~ PRGE. 007 ~WG 05 ' 94 04: 2E~P~1 BDS8tt1 P . 8 2~29718 into a conYeylng line at opera~ing pre3~ure~ o~ more than : 10 bar, o~ten eVsn more than 100 bar. W~th pumped concr~t2, ~or QX~mple, presgurBs of up to 300 bar a~e ~easured at the pump.
B The m~taring devlcQ li~ particularly 4ult~d for adding meter~d amount~ of pulverulent addl~lve~ to cement-containing bullding material6, ~or ~xample. Such admlxtures are, ~or ~xample, accelerators, ~ilica ~ume and~or Amorphou3 ~ilicic acid.
The d~vica i~ ~artlcularly 5uited for add1 ng 5mall metered amount~, pre~erably ~p to 10% ln relatlon ~o the binder.
The metering d~vic~ of ~h~ invention can be op~rated as a separate devica or bullt as an added unit on a lS conveying machln~. The synchronous control With ~he aonv~ying machin~ can tako plac~ mecbanloally A~ W~ll a slRctrlcally.
Uniting Or the admixture or additiv0 ~low with thc ;~ a~r or convey$ng ~low ig accompli~hed by means o~ Y-~h~ped transfer pieCes. speclal expenslve inj~ction noziles are not regulred.
~he metsring devlce of the invention can al~o be employ-d, ln partia~lar, for meterinq of pulverulent ~, ~olld materl~ls in tbe production o~ mixture~, ~uah ¦ Z~ th~ production o~ pumped concreto, dry mortar, ` d-tergent6, oheri=al proouot~, to.
--S--flUG 5 ' 94 16: 39 P~GE. 008 ~IUG 05 'g4 04:Z9P11 BD5811 P 9 - 212~7~8 Fig. 1 de~cr~be~ the rotor prlnc4ple, Fig. 2 ~how~ a pre~er~ed embodlment o~ the metering d~vice of the lnventlon, Fig. 3 shows metering of the powd~r direotly at the GonVeying flow outlet (dry ~pray4n~ method), Fig. 4 ~hows metering o~ th~ powd~r at an arbi~rary point i~ tho c~nveying flow (~ry ~praying method), ' ,:
.~: Fig. 5 ~how~ m~tering o~ the powder at an ~rbitrary - point ln the Conveying flow (wet ~praylng method - thin . ~low), . . .
,J~ 15 Fig. 6 ~hows met~ring of the powder in the oonveying ~low (w~t epraying m~hod - dense flow~.
LE~ ~E$CRIP~QN OF THE PREFERRED EMBODI~ENTS
Op~r~t~on aocording to the rotor principla 4 B
de~cribc~d $n F4g. 1. rrh- conveyed ~natter reao~es the rotor chamber 3 vla the ~ller opening 11, Wh4ch u~ually i~ e~uipp~d with a ~ unnel 1. The turnlng rotor 2 ` transport~ the materlal to th- blow-out chamber 4, ~rom y Wh4ch thc m~torial ~o b~ sprayed or conveyed ent~rs the 2~ conV~ying rlow 5 4n ~reo ~all ~nd aided by the alr 7 at the top. ThQ material i9 tran~orted in a hose or p4pe line by msan~ o~ conv~yin~ air 6 to th~ noz21c~
QUG S 'Y4 16:39 P~GE.0~9 F3U6 05 ' 94 04: Z9PI~1 BDS~M P . 10 212~718 In a met~ring device in accord~nce w~th th~
inventlon whl~h is particularly suited for golld material~, meterlng take~ plaae ~neumatlcally by means of A rotor. To ~a~e posclbl~ metering against overpre~surR, the rotor 2 i6 ~ealed by statlonary ~lid$ng counterparts 8, 10.
Thia seal ~an be achieved by uslng a ground-in rotor 2, sealod on the top and ~ottom pr~fer~bly by ground-ln sealing plates 8, lo. Preferably a~ le~t one Or the lo ground-in parts, ror exampl~ the sealing pl~tes 8, lo, i sur~ac~-har~ened. The slldlng count~rpart~, partlcularly seAllng plat~s B, 10 can bs mad~ of metal, o~ a cera~ic matorial, or a combination thereo~.
Also, the seallng plate~ ~an b~ ~ade of polymer$o materi~ls, pra~srably r~infor~ed polymerio ~ateri~ls.
For b~tter presgure ~ontrol, in a partlcularly pr~e~r~d 2mbodl~ent the rotor 2 1~ enca~ed ln a pre~sure-proof houslng 9.
Tho rotor drive 12 can extend on both Qide~ ou~ o~
the possibly ~pe~ially 3ealsd rotor area, wherQin a ~ixing devioo can be provid~d ~or tha material to ~e filled lh and metered on ths fill~r side. Howover, a rotor drlve 12 which e~orge6 ~rom th~ sealed rotor are~
only on the dri~e slds a~ shown ln Fig. 2 is pre~srred 25 ~or r~asonB of ~e~ling.
Such a met~rlng device which is 6uitable for 6011d materlal~ in partlcular, comp~isas a ro~o~ 2 and a -aling platH 10 prov~ded wit~ at least ons Eille~
PUG 5 '94 16:39 PhEiE.~310 fiUG 05 '94 04:Z9PM BDS~M 21 2 9 71 8 P 11 .
openlng 11, which 1s d~rectly oonnected with at lsa~t one rotor chamber 3. ~ha at least one rotor ohamber 3 i~
connect~, displaced with respect to ths filler opQning 11, with a blow-out chamber ~ and a 6upply line for the tcp air 7, wherein the supply line ~or the top alr 7 ~nd the ~olow~ out cha~ber 4 a~e dl~posed on opposite side~ o~
the rctor chamber 3. So that metering can take plaoe against overpressure, the rotor 2 is sealQd again~t the tatlonary al1ding counterparts 8, lo. To ~ssure good conveying of the conveylng ~low 5, a supply line ~or aonvQying air 6 ~s provided in the blow-out chamber 4.
The preferred embodlment o~ the metering device ln aa~ordance with the invention ~ho~n in Flg. 2 indlcat~s that the problem wae ~olved ~y encapsulating the rotor 2 in ~ prss~ur0- proo~ housing 9 as ~ell a~ by employing a ground-ln rotor ~, whioh 1~ sealed At the top and bottom by mean~ of sur~ace-harden~d and ground-in eeallng plate~
8, 10.
ThQ ~etering deYice can ha~e a plurallty o~ ~1116r ¦ ao openinge 11 o~ dl~Ça~ent ~i~es, ~o that me~er~ng can be controlled not only by ~eans o~ the ~peed of rotation, but also by means o~ the rs~pectiv~ rlllln~ or blown-out volu~.
Th- ~tatlonary ~llding counterpdrt~l in partl~ular ! 2~ sealin~ she2ts, are preferably made o~ ~etal or æpecial ', ceramic materialæ.
Aæ noted abo~, Fig. 3 and ~ig. 4, lll~strat~
embodlm-nt~ o~ the lnvehtion a~sooiated with the dry ~UG 5 '94 16:40 P~GE.011 I~UG 05 ~94 04::3E~PM ~DS~,M P.12 , 6pray~g method. A~ illustrated in F~g. 3, pulverul~ht ~olid mat~riAl can be added to th~ ro~or mstering d~vico along wlth co~pr~ssed alr which 1~ al~o addQ~ to the dry Qpray~ng mac~ine. Th~ dry 6p~aying mA~hine and rotor met~ri~g devi~e are ~ynchronou~ly aon~rolled, and ~he powdQr is met~red directly a~ the conv~ying ~low outlet.
Water and additiYes ~re add2d, optlon~lly under high : pr~sure, at the noz~le.
Flg. 4 illustrates a 8imllar embodlm~nt exc~pt the lo powder is me~er~d at an a~bitrary poin~ in the conveyiny ~low.
Fig. 5 and Flg. 6 illu~trat~ embodimerlt3 involvlng synchronous con~rol of th~ ~praying machlne and rotor mQtering dG~rice, but in connectlon with the wet sprayinS~
method. Pig. 5 illustrate~ m~ering powd~r at an atbitrary point of the conveying flow ln ~ thin flow tochnigue. ~ig. 6 lllu~trntus a dun~a rlow t-chnlquc.
~, ' RUG 5 '94 16:40 PRGE.012
Claims (46)
1. A metering device, in particular for solid materials, characterized in that metering is performed pneumatically by means of a ground-in rotor (2) with at least one rotor chamber (3), wherein the rotor (2) is sealed on the top and bottom by means of surface-hardened and ground-in slide partners, in particular sealing plates (8, 10).
2. A metering device in accordance with claim 1, characterized in that the rotor (2) is encapsulated.
3. A metering device in accordance with claim 1 or 2, characterized in that the stationary slide partners, in particular sealing plates, are made of metal, of a special ceramic material or a combination of the two.
4. A metering device in accordance with one of claims 1 to 3, characterized in that the sealing plates are made of reinforced plastic materials.
5. Use of the metering device in accordance with one of claims 1 to 4, characterized in that it is used for motoring of solid materials in connection with the production of mixtures.
6. Use in accordance with claim 5, characterized in that the metering device is used for metering of solid additives in connection with the spraying of mortar and concrete in accordance with the dry or wet method, wherein the additives are in particular accelerating agents and/or silica fumes and/or amorphous silicic acid.
7. Use in accordance with claim 5 or 6, characterized in that the metering device is used for metering of granulates, grain-shaped solids or particularly for pulverulent solid materials.
8. Use in accordance with one of claims 5 to 7, characterized in that the metering device is operated as a separate device or installed on a conveying machine.
9. Use in accordance with one of claims 5 to 8, for metering solid materials, in particular pulverulent solid materials, against overpressure.
10. Use in accordance with claim 9, for metering solid materials to be added to the pressurized conveying flow of pumped concrete and particularly of shotcrete by the dry and/or wet spraying method.
11. A method for metering solid materials in particular, more particularly pulverulent solid materials, characterized in that the metering device in accordance with one of claims 1 to 4 is controlled mechanically or electrically and synchronously with the conveying machine.
12. Metering device, characterized in that the metering is performed pneumatically by means of a rotor of which the rotor chamber is sealed against the top and the bottom sliding counterparts.
13.Metering device particularly for solids, particularly according to claim 1, characterized in that the metering is performed pneumatically by an encased, ground rotor which is sealed by surface hardened and ground sealing sheets.
14. Metering device according to any one of claims 1 and 2, characterized in that the stationary sliding counterparts, particularly sealing sheets, consist of metal, special ceramic material or a combination thereof.
15. Metering device according to any one of the claims 1 to 3, characterized in that the sealing sheets consist o reinforced plastics.
16. Metering device according to any one of the claims 1 to 4, characterized in that it is used for the dosing of solid additives or aggegates in the spraying of mortar or concrete according to the dry or wet spraying method.
17. Metering device according to any one of the claims 1 to 5, characterized in that it is operated independent device or is mounted to a conveyer.
18. Metering device according to any one of the claims 1 to 6, characterized in that is mechanically or electrically controlled in synchronism with the conveyor.
19. Metering device according to any one of the claims 1 to 7, characterized in that it is used for dosing solids in the production of mixtures.
20. Metering device according to any one of the claims 1 to 8, characterized in that it is used for the dosing of pulverized solids, granulated material or grains.
21. In a process for spraying concrete or mortar by the dry or wet spraying method, dosing solid admixtures and/or additives or aggregates by pneumatically metering said admixtures and/or additives or aggregates using a rotor metering device comprising a ground-in rotor with at least one rotor-chamber, acid rotor being sealed on the top and bottom by means of sliding counterparts.
22. A process according to claim 21, said rotor being sealed on the top and bottom by means of ground-in sliding counterparts, at least one of which is surface hardened.
23. A process according to claim 21, operating said metering device by mounting to a conveying device or independently.
24. A process according to claim 23, wherein said metering device is operated against overpressure.
25. A process according to claim 24, comprising operating said metering device by mounting to a conveying device and dosing said solid admixtures and/or additives or aggregates to a pressurized conveying flow of pumped concrete or mortar.
26. A process according to claim 24, comprising operating said metering device by mounting to a conveying device and dosing said solid admixtures and/or additives or aggregates to a pressurized conveying flow of spraying concrete or mortar.
27. A process according to claim 23, comprising operating said metering device by mounting to a conveying device wherein the metering device is mechanically or electrically controlled synchronously with the conveying device.
28. A process according to claim 21, wherein said sliding counterparts are sealing plates.
29. A process according to claim 22, wherein said rotor is encased in a pressure-proof housing.
30. A process according to claim 22, said sliding counterparts comprised of metal, a cermic material, or combination thereof.
31. A process according to claim 21, said sliding counterparts comprised of a polymeric material.
32. A process according to claim 31, said sliding counterparts comprised of a reinforced polymeric material.
33. A process according to claim 21, comprising dosing of pulverized solids, granulated materials or grains.
34. A process according to claim 21, comprising dosing setting accelerators, silica fume or amorphous silicic acid.
35. A process according to claim 21, comprising dosing pulverulent admixtures and/or additives.
36. A rotor metering device effective for pneumatically metering solid materials comprising a ground-in rotor with at least one rotor chamber wherein the rotor is sealed on the top and bottom by means of sliding counterparts.
37. A rotor metering device according to claim 36, wherein said rotor is sealed by means of ground-in sliding counterparts, at least one of which is surface-hardened.
38. A rotor metering device according to claim 36, mounted to a conveying device.
39. A rotor metering device according to claim 38, mounted to a conveying device effective for conveying concrete or mortar under pressure.
40. A rotor metering device according to claim 36, mounted to a conveying device, said rotor metering device mechanically or electrically controlled in synchronism with the conveying device.
41. A device according to claim 36, wherein said sliding counterparts are sealing plates.
42. A device according to claim 36, wherein said rotor is encased in a pressure-proof housing.
43. A device according to claim 37, said sliding counterparts comprised of metal, a ceramic material, or combination thereof.
44. A device according to claim 36, said sliding counterparts comprised of a polymeric material.
45. A device according to claim 44, said sliding counterparts comprised of a reinforced polymeric material.
46. In a process for dosing solid materials to form mixtures, dosing said solid materials by pneumatically metering solids using a rotor metering device comprising a ground-in rotor with at least one rotor-chamber, said rotor being sealed on the top and bottom by means of ground-in sliding counterparts, at least one of which is surface hardened.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2441/93-2 | 1993-08-09 | ||
| CH244193 | 1993-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2129718A1 true CA2129718A1 (en) | 1995-02-10 |
Family
ID=4233893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002129718A Abandoned CA2129718A1 (en) | 1993-08-09 | 1994-08-08 | Metering device for solid materials |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0638402A1 (en) |
| JP (1) | JPH07151583A (en) |
| KR (1) | KR950005482A (en) |
| CA (1) | CA2129718A1 (en) |
| ES (1) | ES2068802T1 (en) |
| NO (1) | NO942812L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188637A (en) * | 2020-03-12 | 2020-05-22 | 山东科技大学 | Remote concrete sprayer |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0776843A1 (en) * | 1995-12-14 | 1997-06-04 | Sika Equipment AG | Conveyor device, operating method therefor and applications |
| NL2001723C2 (en) * | 2008-06-26 | 2009-12-29 | Wijngaarden Beheer B V Van | Automatic cement feeding device for use in construction site, has pressure system i.e. pressure vessel, provided for pressurizing portion of cement from cement chamber for passing portion of cement through cement guide |
| WO2011121622A1 (en) * | 2010-04-01 | 2011-10-06 | Giorgio Pecci | Evacuation assembly for apparatuses for transforming organic matter |
| CH709592A1 (en) | 2014-05-05 | 2015-11-13 | Charly Pfammatter | A method of spraying concrete by means of compressed air. |
| GB2554830B (en) * | 2015-07-07 | 2021-04-28 | Halliburton Energy Services Inc | Particulate dispenser |
| CN106829547A (en) * | 2016-12-28 | 2017-06-13 | 上海洛瓷动力科技有限公司 | A kind of clout monitoring and quantization feed block |
| US11247853B2 (en) * | 2019-09-06 | 2022-02-15 | Michael Nolen | Rotary airlock device and system for moving and placing granulate material |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB639418A (en) * | 1945-03-30 | 1950-06-28 | Richard Royal Colburn | Improvements in or relating to measuring and feeding devices |
| GB646817A (en) * | 1946-12-09 | 1950-11-29 | Richard Royal Colburn | Improvements in or relating to a measuring and feeding device |
| US3076580A (en) * | 1960-02-12 | 1963-02-05 | Engineered Equipment Inc | Concrete aggregate feeder |
| JPS56124465A (en) * | 1980-03-05 | 1981-09-30 | Gijutsu Shigen Kaihatsu Kk | Method and apparatus for spraying cement mortar, etc. |
| DE3031219C2 (en) * | 1980-05-27 | 1983-10-06 | Aliva AG, 8967 Widen, Mutschellen | Material feeder for systems for the pneumatic conveying of bulk materials |
| CH650307A5 (en) * | 1981-05-27 | 1985-07-15 | Intradym Masch Ag | CONCRETE SPRAYING MACHINE. |
| DE3335860A1 (en) * | 1983-10-03 | 1985-04-18 | Klöckner-Humboldt-Deutz AG, 5000 Köln | DEVICE AND WORKING METHOD FOR DISCHARGING MATERIALS FROM PRESSURE TANKS |
| JPH0674991B2 (en) * | 1990-10-09 | 1994-09-21 | 鹿島建設株式会社 | Powder pressure metering device |
-
1994
- 1994-06-17 ES ES94109433T patent/ES2068802T1/en active Pending
- 1994-06-17 EP EP94109433A patent/EP0638402A1/en not_active Withdrawn
- 1994-07-28 NO NO942812A patent/NO942812L/en unknown
- 1994-07-28 JP JP6176654A patent/JPH07151583A/en active Pending
- 1994-08-05 KR KR1019940019321A patent/KR950005482A/en not_active Application Discontinuation
- 1994-08-08 CA CA002129718A patent/CA2129718A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188637A (en) * | 2020-03-12 | 2020-05-22 | 山东科技大学 | Remote concrete sprayer |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2068802T1 (en) | 1995-05-01 |
| NO942812D0 (en) | 1994-07-28 |
| EP0638402A1 (en) | 1995-02-15 |
| JPH07151583A (en) | 1995-06-16 |
| KR950005482A (en) | 1995-03-20 |
| NO942812L (en) | 1995-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19980810 |