CA2166098A1 - Method and apparatus for the transportation of concrete and the like material in pipelines - Google Patents
Method and apparatus for the transportation of concrete and the like material in pipelinesInfo
- Publication number
- CA2166098A1 CA2166098A1 CA002166098A CA2166098A CA2166098A1 CA 2166098 A1 CA2166098 A1 CA 2166098A1 CA 002166098 A CA002166098 A CA 002166098A CA 2166098 A CA2166098 A CA 2166098A CA 2166098 A1 CA2166098 A1 CA 2166098A1
- Authority
- CA
- Canada
- Prior art keywords
- pipeline
- tube
- mix
- pipe
- transportation
- 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
- 239000004567 concrete Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 title claims description 10
- 239000000203 mixture Substances 0.000 claims abstract description 44
- 239000011378 shotcrete Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 3
- 239000004840 adhesive resin Substances 0.000 claims description 2
- 229920006223 adhesive resin Polymers 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 241001131688 Coracias garrulus Species 0.000 claims 1
- 239000004033 plastic Substances 0.000 abstract description 4
- 239000006260 foam Substances 0.000 abstract description 3
- 239000003570 air Substances 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B65G53/52—Adaptations of pipes or tubes
- B65G53/521—Adaptations of pipes or tubes means for preventing the accumulation or for removal of deposits
-
- 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
- B65G53/32—Conveying concrete, e.g. for distributing same at building sites
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
A method and an apparatus for the transportation of shotcrete and pumped concrete mix of stiff plastic consistency (12) in pipelines (I, II, IV) comprises the injection of a fluid through perforations (10) provided in the pipe (1) surrounding the shotcrete or pumped concrete mix (12) to be transported. The fluid may be compressed air, foam or liquid. Thereby friction between the transported mass and the inside of the pipeline is substantially reduced. The fluid may be guided through the perforations (10) through a mid-pipe space (2) between ah outer pipe (4) and an inner pipe (1) or a tube or a system of connected cavities (2A) with perforations (10) spirally implanted in a single-wall pipeline (1 and 4). The pipeline can abruptly rotate for 180 degrees clockwise and counterclockwise with stowing and pausing between turnarounds, providing reduced adhesion and better homogeneity of the mix passing through the pipeline.
Description
ZEITLER & DICKEL
PATENTANWALTE EUROPEAN PATENT ATTORNEYS
POSTFACH 26 02 51 TQEFON: 089/22 18 06 HERRNSTRASSE 15 0-80059 MUNCHENTELEfAX: 089/22 26 27 D-80539 MUNCHEN
Moderne Tehnologlje Gradenja et al.
5236 III/os May 19, 1995 Method and APParatus for the Trans~ortation of Shotcrete and PumPed Concrete Mix of Stiff-Plastic ConsistencY in o PlPelines The invention relates to a method and apparatus for the transportation of concrete mix and like materials in pipelines.
From JP-A-59227622 there is known device for the transportation of highly viscous liquids or powders by sending a gasseous fluid through tiny holes with apertures 0,01 - 20 ~m provided in the pipe surrounding said materials to be transported. The transported pipe is a filter pipe having multiple tiny holes with a total area of 37...40 % of the pipe wall. This device would be completely unsuited for 2 transportation of shotcrete and concrete mix since the tiny holes would be blocked by solid particles, the weakened pipeline wall would be destroyed repidly by wearing and the transported system would be unstable because of small pressure difference between inner and outer side of perforated pipeline.
During the transportation of shotcrete and pumped concrete mix through the bended outlet tube and flexible pipeline, high resistance of the conveyed sticky mix appears.
Therefore, it is not possible to transport mixes of stiff-plas~tic consistency over large distances. Even over small distances energy consumption for the transportation is excessively high.
Furthermore, primarily the shotcrete mix composition is neither uniform nor uniformly distributed over the pipeline ~4END~D æET
- ` 2166098 cross-section due to gravitation. This fact makes the transport over large distances more difficult.
It is therefore an object of the present invention to over-come the before-mentioned problems and shortcomings and provide a method as well as an apparatus which makes it possible to transport shotcrete and pumped concrete mix of stiff-plastic consistency over large distances. It is 2 further object to reduce energy consumption during such transportation. Furthermore, the compounds of the mix composition should be uniformly distributed over the pipe-line cross-section when said mix composition leaves the pipe after transportation.
These objects are achieved by the features as mentioned in the appended claims.
The method according to the invention is characterized by injecting a fluid through perforations provided in the pipe surrounding the shotcrete or pumped concrete mix to be transported. The injected fluid "lubricates" the mix composition inside the pipe, thus, making transportatlon of shotcrete and pumped concrete mix or stiff-plastic consistency possible and reducing substantially energy consumption. Compressed air, foam or liquid are injected through punctures densely distributed over the transportation pipe.
A rotation of the pipeline about its longitudinal axis clockwise and counterclockwise by 180 with stopping and pausing between the turnarounds wet or dry mix passing over the~ lower side of the tube, turns to the upper side after the: turnaround providing a thorough mixing of the compounds. Thus, the compounds of the mix are uniformly distributed over the pipeline cross-section.
- A~N~ED SHEE~
216609~
The pipe surrounding the shotcrete or concrete mix to be transported , whlch is provided with the perforations, is surrounded by an outer pipe with a mid-pipe-wall space, said mid-wall space being in connection with the outer ends of the perforations as well as pressure source for injecting compressed air or liquid. The mid-pipe-wall space is closed at its ends with elastic seals and the outer pipe is connected to a lateral hose with a valve for pressure control to the mid-pipe-wall space. According to one embodiment the perforations on the inner pipe are punctured without removing the flexible mass of the pipe. According to another embodiment the small holes may be drilled or formed with removing pipe wall material.
Thermally resistant fibers or fiber loops at the outer surface of the inner tube ends and at the inner surfaces at the outer tube ends may be processed in such a way that one part of the fibers or fiber loops is implanted into the rubber mass and another part is uncovered and bound together in the seal space which is limited by a washer and filled with elastic adhesive resin or melted rubber mass.
The inner tube ends may have thinner walls from the inner side in which inner rings are to be inserted and fastened to the outer rings and having brackets airtightly pressing the outer tube around the inner tube over the inner rings.
According to another embodlment of the apparatus of the lnventlon there is a slngle-wall pipellne whlch has a splrally lmplanted tube lnside its single wall or a system of connected cavities with punctures connecting the tube or cavitles to the lnner space of the pipeline. The tube or the connected cavities have an outside connection to a pressure source for lnjectlng the fluld.
In accordance with a further embodiment of the invention the pipeline system is connected to a turning device for rotating the same about its longitudinal axis clockwise and ,~MENn~D ~tE~
~166098 , counterclockwise for 180. Preferrably the middle part is mounted on a rotating bearing ring which has a cogwheel while the cog-transporter device converts mechanical work of a motor into abrupt rotation of the pipeline over the cogwheel with abrupt stopping and pausing. The rotating device with a stable bearing ring is placed at an upper adjustable base stand that can be lifted or lowered with respect to the lower stable base stand of a movable roller.
lC
Further features and details of the invention become clear from the following description of different embodiments of the apparatus of the invention with reference to the altached drawings, wherein:
Fig. 1 is a schematic sectionial view of the apparatus according to one p.eferred embodiment of the invention, Fig. 2 a partial longitudinal section of a double-wall pipeline, Fig. 3 a further sectional view of an assembled and sealed double-wall pipeline, Fig. 4 a sectional view of a single-wall pipeline according to another embodiment of the invention, and Fig. 5 a schematic view of the apparatus for the movement of the apparatus according to the invention.
As shown in fig. 1 depicting a schematic view of the apparatus for carrying out the invention there is a hopper 11 storing concrete mix to be transported to a distant point. A rotation barrel cylinder 12 is filled with concrete mix and a further rotation barrel cylinder 13 AUENDED SflEET
discharges the concrete mix into the pipeline. A lateral pipeline 14 introduces compressed air as moving medium pushing the concrete mix through the pipeline. The wet concrete mix passes through the bended outlet tube comprising an inner wall 15 and an outer wall 16. The double-wall bended outlet tube I is provided with an end joint 17. The wet mix further passes through a flexible double-wall pipeline II, nozzle III for injecting the acceler2ting admixture (if necessary) and finally through a flexible double-wall pipeline IV.
In dry shotcrete transportation double-wall flexible pipeline IV (Fig. 2) is connected after (sometimes before and after) the nozzle for injecting water and liquid accelerating admixture.
The bended outlet tube (Fig. 3) that connects the machine and pipeline can be accomplished by double wall. Compressed air is injected through numerous small holes 10 distributed over inner tube 15 wall. Valve 6 regulates the fluid pressure and flow through lateral pipeline 18 connected on outer tube. The bended outlet tube can be disassembled because of cleaning the small holes.
Double-wall flexible pipeline (Fig. 3) consists of flexible inner tube 1 provided with reinforcements 31 and outer tube 4. The mid-pipe-walls space 2 is closed with elastic seals 3 at ends of the pipeline. Inner flexible tube 1 has punctures 10, densely distributed over the wall surface, perpendicular or inclined to the direction of mix path.
Outer tube 4 is airtight under the working pressure.
Compressed air or lubricating liquid passes through the late~al hose 5 to the mid-pipe-walls space 2. Valve 6 in the position A' or B' (Fig. 3) directs the compressed air into the space 2 or from the space 2 into the space of lower pressure, respectively. Pressures and time intervals AMENDED SI~
`
.
between A' and B' valve positions, are regulated automatically. Filter 7 stops oils.
-Lubrication liquid (e.g. superplasticiser or aer-entraining admixture) is injected through injector and lateral pipe-line 5 into the mid-pipe-wall space.
At the ends of sealed pipeline, the outer side of inn~r flexible tube 1 and the inner side of outer flexible tube ~
are prepared to form reinforced elastic seals. One part of thermally reslstant fibers or flber loops 32 are implanted into the rubber mass while the other part is protected during the tube fabrlcatlon (Fig. 3 - rl~ht) or exposed later by dissolving the rubber surface. Before the double-wall pipeline is sealed, the washer 3A is inserted to mid-pipe-walls space 2 and this place is pressed by brackets.
Then the pipeline end is set upright to pour the adhesive elastic resin,or melted rubber mass into the seals space 3 and left in this position until the mass hardens. Fibers or bounded fiber loops 32 at the end of pipeline walls provide enhanced bond and tensile strenght of the seal 3. Pipeline ends are protected from large deformation by inner ring 30 and outer ring 8.
At the assembled pipeline (Fig. 3 - left) inner tube walL
is made thinner at the ends. Inner ring 30 of the same inner diameter as the tube, is inserted at the tube end.
Outer ring 8 is fastened on the inner ring 30. The outer flexible tube 4 is airtightly pressed to the inner tube 1 with brackets 29 over the inner rings 30.
The rigid rings 8 have thicker ends for connecting the adjeacent pipeline by bracket clips. These rings are fastened to the flexible tubes 4 and 1 by screws 9.
According to another embodiment of the invention (Fig. 4) there is provided a single-wall pipeline 1 & 4 with a A~E~ED SHElj 21660~8 .
spirally implanted hose or an interconnected system of cavities 2A. The hose or cavities 2A are connected to a pressure source (not shown) for feeding a fluid under pressure. Punctures 10 connect the hose or cavities 2A to the inside of the single-wall pipeline 1 & 4 in order to reduce the friction between the moving concrete mix and the inner wall. The single-wall pipeline 1 & 4 is provided with reinforcements 31.
The pipeline should be mounted from above at roller 33 (Fig. 5). The rotating bearing ring 35, fixed on the pipeline, is mounted over fixed bearing ring 34. Cog-wheel 36 on rotatina bearing ring 35 is coupled to the cog-transporter 37 for transferring the movement from motor15 device into the pipeline rotation for 180 degrees, clock-wise and counterclockwise. Motor device is mounted andfixed at upper moveable stand base 38 which can be lifted or lowered in respect to the lower stable stand base 39.
The roller 33 with the pipeline can move depending ton tne variation of shotcreting position.
During rotation, wet mix and lubrication liquid abruptly exchange positions from lower to upper side of the pipeline (Fig. 5~-By the injection of compressed air or liquid into the inner space of the flexible origin pipeline in thin jets coming through the densely distributed punctures 10 at the inner tube wall air or liquid jets are being bended in the direction of mixed path due to pressure of the transporting mix. Thus sticky mix is separated from the pipeline wall.
The.jets are separated later in small air or foam bubbles which are homogenised with the mixed mass. Such aerated mix leaves the pipeline and hits onto the backup surface at high velocity in case of shotcrete or its flow is made smooth before placing in case of pumped concrete. In case of abrupt pressure variation in space 2 or hose or cavitieS
~MEND~D ~HEET
-1 2A from maximal (valve in position Al) to minimal (valve in position B') causes changes of diameter of the flexible pipe which intern causes retraction of sticky mix from the inner pipeline wall.
By abrupt rotation of the pipeline around its axis for 180 degrees clockwise and counterclockwise and abruptly stopping with a pause so that the mix passing through the lower part of the pipeline (Fig. 5, position A) exchanges its position with the upper part of the pipeline (Fig. 5, position B) then falling through the middle part of air stream due to gravitation and such uniformy homogenised mix is accelerated by the same amount of air.
Where the present invention has been described with reference to cert~in preferred embodiments various modifications will be apparent to those skilled in the art and any such modifications are intended to be within the scope of the invention as set forth in the appended claims.
AIUENDED SHEEi
PATENTANWALTE EUROPEAN PATENT ATTORNEYS
POSTFACH 26 02 51 TQEFON: 089/22 18 06 HERRNSTRASSE 15 0-80059 MUNCHENTELEfAX: 089/22 26 27 D-80539 MUNCHEN
Moderne Tehnologlje Gradenja et al.
5236 III/os May 19, 1995 Method and APParatus for the Trans~ortation of Shotcrete and PumPed Concrete Mix of Stiff-Plastic ConsistencY in o PlPelines The invention relates to a method and apparatus for the transportation of concrete mix and like materials in pipelines.
From JP-A-59227622 there is known device for the transportation of highly viscous liquids or powders by sending a gasseous fluid through tiny holes with apertures 0,01 - 20 ~m provided in the pipe surrounding said materials to be transported. The transported pipe is a filter pipe having multiple tiny holes with a total area of 37...40 % of the pipe wall. This device would be completely unsuited for 2 transportation of shotcrete and concrete mix since the tiny holes would be blocked by solid particles, the weakened pipeline wall would be destroyed repidly by wearing and the transported system would be unstable because of small pressure difference between inner and outer side of perforated pipeline.
During the transportation of shotcrete and pumped concrete mix through the bended outlet tube and flexible pipeline, high resistance of the conveyed sticky mix appears.
Therefore, it is not possible to transport mixes of stiff-plas~tic consistency over large distances. Even over small distances energy consumption for the transportation is excessively high.
Furthermore, primarily the shotcrete mix composition is neither uniform nor uniformly distributed over the pipeline ~4END~D æET
- ` 2166098 cross-section due to gravitation. This fact makes the transport over large distances more difficult.
It is therefore an object of the present invention to over-come the before-mentioned problems and shortcomings and provide a method as well as an apparatus which makes it possible to transport shotcrete and pumped concrete mix of stiff-plastic consistency over large distances. It is 2 further object to reduce energy consumption during such transportation. Furthermore, the compounds of the mix composition should be uniformly distributed over the pipe-line cross-section when said mix composition leaves the pipe after transportation.
These objects are achieved by the features as mentioned in the appended claims.
The method according to the invention is characterized by injecting a fluid through perforations provided in the pipe surrounding the shotcrete or pumped concrete mix to be transported. The injected fluid "lubricates" the mix composition inside the pipe, thus, making transportatlon of shotcrete and pumped concrete mix or stiff-plastic consistency possible and reducing substantially energy consumption. Compressed air, foam or liquid are injected through punctures densely distributed over the transportation pipe.
A rotation of the pipeline about its longitudinal axis clockwise and counterclockwise by 180 with stopping and pausing between the turnarounds wet or dry mix passing over the~ lower side of the tube, turns to the upper side after the: turnaround providing a thorough mixing of the compounds. Thus, the compounds of the mix are uniformly distributed over the pipeline cross-section.
- A~N~ED SHEE~
216609~
The pipe surrounding the shotcrete or concrete mix to be transported , whlch is provided with the perforations, is surrounded by an outer pipe with a mid-pipe-wall space, said mid-wall space being in connection with the outer ends of the perforations as well as pressure source for injecting compressed air or liquid. The mid-pipe-wall space is closed at its ends with elastic seals and the outer pipe is connected to a lateral hose with a valve for pressure control to the mid-pipe-wall space. According to one embodiment the perforations on the inner pipe are punctured without removing the flexible mass of the pipe. According to another embodiment the small holes may be drilled or formed with removing pipe wall material.
Thermally resistant fibers or fiber loops at the outer surface of the inner tube ends and at the inner surfaces at the outer tube ends may be processed in such a way that one part of the fibers or fiber loops is implanted into the rubber mass and another part is uncovered and bound together in the seal space which is limited by a washer and filled with elastic adhesive resin or melted rubber mass.
The inner tube ends may have thinner walls from the inner side in which inner rings are to be inserted and fastened to the outer rings and having brackets airtightly pressing the outer tube around the inner tube over the inner rings.
According to another embodlment of the apparatus of the lnventlon there is a slngle-wall pipellne whlch has a splrally lmplanted tube lnside its single wall or a system of connected cavities with punctures connecting the tube or cavitles to the lnner space of the pipeline. The tube or the connected cavities have an outside connection to a pressure source for lnjectlng the fluld.
In accordance with a further embodiment of the invention the pipeline system is connected to a turning device for rotating the same about its longitudinal axis clockwise and ,~MENn~D ~tE~
~166098 , counterclockwise for 180. Preferrably the middle part is mounted on a rotating bearing ring which has a cogwheel while the cog-transporter device converts mechanical work of a motor into abrupt rotation of the pipeline over the cogwheel with abrupt stopping and pausing. The rotating device with a stable bearing ring is placed at an upper adjustable base stand that can be lifted or lowered with respect to the lower stable base stand of a movable roller.
lC
Further features and details of the invention become clear from the following description of different embodiments of the apparatus of the invention with reference to the altached drawings, wherein:
Fig. 1 is a schematic sectionial view of the apparatus according to one p.eferred embodiment of the invention, Fig. 2 a partial longitudinal section of a double-wall pipeline, Fig. 3 a further sectional view of an assembled and sealed double-wall pipeline, Fig. 4 a sectional view of a single-wall pipeline according to another embodiment of the invention, and Fig. 5 a schematic view of the apparatus for the movement of the apparatus according to the invention.
As shown in fig. 1 depicting a schematic view of the apparatus for carrying out the invention there is a hopper 11 storing concrete mix to be transported to a distant point. A rotation barrel cylinder 12 is filled with concrete mix and a further rotation barrel cylinder 13 AUENDED SflEET
discharges the concrete mix into the pipeline. A lateral pipeline 14 introduces compressed air as moving medium pushing the concrete mix through the pipeline. The wet concrete mix passes through the bended outlet tube comprising an inner wall 15 and an outer wall 16. The double-wall bended outlet tube I is provided with an end joint 17. The wet mix further passes through a flexible double-wall pipeline II, nozzle III for injecting the acceler2ting admixture (if necessary) and finally through a flexible double-wall pipeline IV.
In dry shotcrete transportation double-wall flexible pipeline IV (Fig. 2) is connected after (sometimes before and after) the nozzle for injecting water and liquid accelerating admixture.
The bended outlet tube (Fig. 3) that connects the machine and pipeline can be accomplished by double wall. Compressed air is injected through numerous small holes 10 distributed over inner tube 15 wall. Valve 6 regulates the fluid pressure and flow through lateral pipeline 18 connected on outer tube. The bended outlet tube can be disassembled because of cleaning the small holes.
Double-wall flexible pipeline (Fig. 3) consists of flexible inner tube 1 provided with reinforcements 31 and outer tube 4. The mid-pipe-walls space 2 is closed with elastic seals 3 at ends of the pipeline. Inner flexible tube 1 has punctures 10, densely distributed over the wall surface, perpendicular or inclined to the direction of mix path.
Outer tube 4 is airtight under the working pressure.
Compressed air or lubricating liquid passes through the late~al hose 5 to the mid-pipe-walls space 2. Valve 6 in the position A' or B' (Fig. 3) directs the compressed air into the space 2 or from the space 2 into the space of lower pressure, respectively. Pressures and time intervals AMENDED SI~
`
.
between A' and B' valve positions, are regulated automatically. Filter 7 stops oils.
-Lubrication liquid (e.g. superplasticiser or aer-entraining admixture) is injected through injector and lateral pipe-line 5 into the mid-pipe-wall space.
At the ends of sealed pipeline, the outer side of inn~r flexible tube 1 and the inner side of outer flexible tube ~
are prepared to form reinforced elastic seals. One part of thermally reslstant fibers or flber loops 32 are implanted into the rubber mass while the other part is protected during the tube fabrlcatlon (Fig. 3 - rl~ht) or exposed later by dissolving the rubber surface. Before the double-wall pipeline is sealed, the washer 3A is inserted to mid-pipe-walls space 2 and this place is pressed by brackets.
Then the pipeline end is set upright to pour the adhesive elastic resin,or melted rubber mass into the seals space 3 and left in this position until the mass hardens. Fibers or bounded fiber loops 32 at the end of pipeline walls provide enhanced bond and tensile strenght of the seal 3. Pipeline ends are protected from large deformation by inner ring 30 and outer ring 8.
At the assembled pipeline (Fig. 3 - left) inner tube walL
is made thinner at the ends. Inner ring 30 of the same inner diameter as the tube, is inserted at the tube end.
Outer ring 8 is fastened on the inner ring 30. The outer flexible tube 4 is airtightly pressed to the inner tube 1 with brackets 29 over the inner rings 30.
The rigid rings 8 have thicker ends for connecting the adjeacent pipeline by bracket clips. These rings are fastened to the flexible tubes 4 and 1 by screws 9.
According to another embodiment of the invention (Fig. 4) there is provided a single-wall pipeline 1 & 4 with a A~E~ED SHElj 21660~8 .
spirally implanted hose or an interconnected system of cavities 2A. The hose or cavities 2A are connected to a pressure source (not shown) for feeding a fluid under pressure. Punctures 10 connect the hose or cavities 2A to the inside of the single-wall pipeline 1 & 4 in order to reduce the friction between the moving concrete mix and the inner wall. The single-wall pipeline 1 & 4 is provided with reinforcements 31.
The pipeline should be mounted from above at roller 33 (Fig. 5). The rotating bearing ring 35, fixed on the pipeline, is mounted over fixed bearing ring 34. Cog-wheel 36 on rotatina bearing ring 35 is coupled to the cog-transporter 37 for transferring the movement from motor15 device into the pipeline rotation for 180 degrees, clock-wise and counterclockwise. Motor device is mounted andfixed at upper moveable stand base 38 which can be lifted or lowered in respect to the lower stable stand base 39.
The roller 33 with the pipeline can move depending ton tne variation of shotcreting position.
During rotation, wet mix and lubrication liquid abruptly exchange positions from lower to upper side of the pipeline (Fig. 5~-By the injection of compressed air or liquid into the inner space of the flexible origin pipeline in thin jets coming through the densely distributed punctures 10 at the inner tube wall air or liquid jets are being bended in the direction of mixed path due to pressure of the transporting mix. Thus sticky mix is separated from the pipeline wall.
The.jets are separated later in small air or foam bubbles which are homogenised with the mixed mass. Such aerated mix leaves the pipeline and hits onto the backup surface at high velocity in case of shotcrete or its flow is made smooth before placing in case of pumped concrete. In case of abrupt pressure variation in space 2 or hose or cavitieS
~MEND~D ~HEET
-1 2A from maximal (valve in position Al) to minimal (valve in position B') causes changes of diameter of the flexible pipe which intern causes retraction of sticky mix from the inner pipeline wall.
By abrupt rotation of the pipeline around its axis for 180 degrees clockwise and counterclockwise and abruptly stopping with a pause so that the mix passing through the lower part of the pipeline (Fig. 5, position A) exchanges its position with the upper part of the pipeline (Fig. 5, position B) then falling through the middle part of air stream due to gravitation and such uniformy homogenised mix is accelerated by the same amount of air.
Where the present invention has been described with reference to cert~in preferred embodiments various modifications will be apparent to those skilled in the art and any such modifications are intended to be within the scope of the invention as set forth in the appended claims.
AIUENDED SHEEi
Claims (10)
1. Method for transportation of highly viscous liquids or powders by sending a gaseous fluid through apertures provided in a pipeline , surrounding the transported materials c h a r a c t e r i z e d by transportation of concrete mix and like materials by injecting a compressed air or air-entraining admixture through punctures provided in the flexible pipeline sur-rounding air-transported material.
2. Method according to claim 1, wherein the shotcrete mix in dry mix procedure, after passing through bended out-put tube (I), pipeline (II) and nozzle (III), continues its path through punctured pipeline (IV).
3. Method according to claim 1, wherein the shotcrete mix in wet mix procedure, after passing through bended out-put tube (I), continues its path through punctured pipeline (II) and after passing the nozzle (III) for injecting acce-lerating admixtures, if necessary, continues through punc-tured pipeline (IV).
4. Method according to anyone of the preceding claims, wherein the pipe surrounding the concrete mix and like materials is turned for 180 degrees clockwise and counter-clockwise about its longitudinal axis.
5. Apparatus for transportation of highly viscous li-quids or powders through a pipeline (1) provided with apertures, the outside end of said apertures being connected to a source of gas pressure, c h a r a c t e r i z e d by flexible pipeline (1) provided with punctures (10) sur-rounding the transported concrete mix and like materials.
6. Apparatus according to claim 5, wherein the inner flexible tube has perforations (10) that are made without removing pipe mass.
7. Apparatus according to claims S and 6, wherein ela-stic seals (3) comprise thermally resistant fibers or fiber loops 832) at the outer surface of the ends of the inner tube (1) and at the ends of the inner surfaces or the outer tube (4) in such a way that one part of the fibers or fiber loops (32) is implanted into the rubber mass and the other part is uncovered and bound together in the seal space (3) which is limited by a washer (3A) and filled with elastic adhesive resin or melted rubber mass.
8. Apparatus according to claims 5 and 6, wherein the inner flexible tube ends have thinner walls from the inner side in which inner rings (30) are to be inserted and fa-stened to the outer rings (8) and having brackets (29) air-tightly pressing the outer tube (4) around the inner tube (1) over the inner rings (30).
9. Apparatus according to claims 5 and 6, wherein said pipe surrounding the concrete and like materials is a single-wall pipeline (1 and 4) which has spirally implanted tube or a system of connected cavities (2A) inside its single-wall provided with punctures (10) connecting the tube or cavities (2A) to the inner space of the pipeline (1 and 4), said tube or cavities (2A) being connected to a pressure source for injecting a fluid into the inner space.
10. Apparatus according to anyone of claims 5 to 9, wherein the middle part of the pipeline is mounted on a ro-tating bearing ring (35) carrying a cogwheel (36) while a cog transporter device (37) converts mechanical work of the motor into abrupt rotation of the pipeline over the cog-wheel (36), clockwise and counterclockwise for 180 degrees with abrupt stopping and pausing, the rotating device with a stable bearing ring (34) being placed at an upper ad-justable base stand (38) which can be lifted or lowered with respect to the lower stable base stand of movable rol-ler (33).
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HRP930992A | 1993-06-24 | ||
| HRP930992 HRP930992A2 (en) | 1993-06-24 | 1993-06-24 | A pipeline for the transportation of shotcrete and pumped concrete of stiff plastic consistency |
| HRP931530 HRP931530A2 (en) | 1993-09-03 | 1993-09-03 | Pipeline for the transportation of shotcrete and pumped concrete of stiff plastic consistency |
| HRP931530A | 1993-09-03 | ||
| HRP940332A | 1994-01-03 | ||
| HRP940332 HRP940332A2 (en) | 1994-01-03 | 1994-01-03 | Pipeline for the transportation of shotcrete and pumped concrete mix of stiff plastic consistency |
| HRP940333A | 1994-05-24 | ||
| HRP940333 HRP940333A2 (en) | 1994-05-24 | 1994-05-24 | Pipeline for the transportation of shotcrete and pumped concrete mix of stiff plastic consistency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2166098A1 true CA2166098A1 (en) | 1995-01-05 |
Family
ID=27451953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002166098A Abandoned CA2166098A1 (en) | 1993-06-24 | 1994-06-20 | Method and apparatus for the transportation of concrete and the like material in pipelines |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0705213A1 (en) |
| JP (1) | JPH09504498A (en) |
| AU (1) | AU7186694A (en) |
| CA (1) | CA2166098A1 (en) |
| CZ (1) | CZ337095A3 (en) |
| NO (1) | NO955086L (en) |
| SK (1) | SK163495A3 (en) |
| WO (1) | WO1995000425A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19514143A1 (en) * | 1995-04-15 | 1996-10-17 | Putzmeister Maschf | Pressure conveyor system for semi solids |
| US5846275A (en) * | 1996-12-31 | 1998-12-08 | Atmi Ecosys Corporation | Clog-resistant entry structure for introducing a particulate solids-containing and/or solids-forming gas stream to a gas processing system |
| US5833888A (en) * | 1996-12-31 | 1998-11-10 | Atmi Ecosys Corporation | Weeping weir gas/liquid interface structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE128004C (en) * | ||||
| GB413372A (en) * | 1933-01-20 | 1934-07-19 | James Malcolm Whitehouse | Improvements in means for feeding or conveying small coal, grain or other powdered or pulverulent material |
| DE2514420A1 (en) * | 1975-04-02 | 1976-10-21 | Schlecht Karl | Pipe for transporting concrete paste - has collar for intermittent injection of friction-reducing liquid |
| JPS59227622A (en) * | 1983-06-06 | 1984-12-20 | Mitsubishi Electric Corp | Method and device for transportation |
| DE8610854U1 (en) * | 1986-04-21 | 1986-10-09 | Teubert, Joachim, 78176 Blumberg | Conveyor device for pearly structured elastic material conveyed by means of a fluid |
| FI89153C (en) * | 1989-01-04 | 1993-08-25 | Partek Ab | ANORDNING FOER TRANSPORT AV PARTIKELMATERIAL |
| US5193942A (en) * | 1991-01-16 | 1993-03-16 | The United States Of America As Represented By The United States Department Of Energy | Method and apparatus for transporting liquid slurries |
-
1994
- 1994-06-20 EP EP94920961A patent/EP0705213A1/en not_active Withdrawn
- 1994-06-20 CZ CZ953370A patent/CZ337095A3/en unknown
- 1994-06-20 CA CA002166098A patent/CA2166098A1/en not_active Abandoned
- 1994-06-20 JP JP7502433A patent/JPH09504498A/en active Pending
- 1994-06-20 SK SK1634-95A patent/SK163495A3/en unknown
- 1994-06-20 WO PCT/EP1994/002007 patent/WO1995000425A1/en not_active Application Discontinuation
- 1994-06-20 AU AU71866/94A patent/AU7186694A/en not_active Abandoned
-
1995
- 1995-12-15 NO NO955086A patent/NO955086L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO955086D0 (en) | 1995-12-15 |
| JPH09504498A (en) | 1997-05-06 |
| CZ337095A3 (en) | 1997-02-12 |
| WO1995000425A1 (en) | 1995-01-05 |
| SK163495A3 (en) | 1996-09-04 |
| EP0705213A1 (en) | 1996-04-10 |
| AU7186694A (en) | 1995-01-17 |
| NO955086L (en) | 1995-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |