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

Definitions

• the invention relates to a method and apparatus for the transportation of shotcrete ' and pumped concrete mix of stiff-plastic consistency in pipelines.
• the shotcrete mix composition is neither uniform nor uniformly distributed over the pipeline 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 a 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.
• 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 transportation 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 or small holes densly distributed over the transportation pipe.
• the fluid is injected with abrupt pressure variations.
• the pulsation of the fluid under pressure causes abrupt changes of the inner tube diameter resulting a separation of the mix from the tube wall. This feature furthermore substantially reduces friction between the mix and the inner pipeline wall during transportation.
• the compounds of the mix are uniformly distributed over the pipeline cross-section. This procedure enables also the uniform lubrication of the inner pipe ⁇ line's surface through the small holes.
• the pipe surrounding the shotcrete or pumped concrete mix to be transported which 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 a fluid which may be compressed air, foam or liquid.
• the mid-pipe-wall space is closed at its ends preferrably 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.
• the perforations on the inner pipe are punctured without removing the flexible mass of the pipe.
• 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.
• there is a single-wall pipeline which has a spirally implanted tube inside its single wall or a system of connected cavities with punctures connecting the tube or cavities to the inner space of the pipeline.
• the tube or the connected cavities have an outside connection to a pressure source for injecting the fluid.
• the pipeline system is connected to a turning device for rotating the same about its longitudinal axis clockwise and counterclockwise for 180°.
• 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.
• Fig. 1 is a schematic sectionial view of the apparatus according to one preferred 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.
• Fig. 5 a schematic view of the apparatus for the movement of the apparatus according to the invention.
• a hopper 0 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 discharges the concrete mix into the pipeline.
• a lateral pipeline 14 introduces compressed air as moving medium 5 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 rigid or
• the bended outlet tube (Fig. 3) that connects the machine 0 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 5 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 or small holes 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 foam or lubricating liquid passes through the lateral 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 between A 1 and B' valve positions, are regulated automatically. Filter 7 stops oils.
• Lubrication liquid e.g. superplasticiser or aerating admixture
• injector and lateral pipe ⁇ line 5 are injected through injector and lateral pipe ⁇ line 5 into the mid-pipe-wall space.
• the outer side of inner flexible tube 1 and the inner side of outer flexible tube 4 are prepared to form reinforced elastic seals.
• One part of thermally resistant fibers or fiber loops 32 are implanted into the rubber mass while the other part is protected during the tube fabrication (Fig. 3 - right) or exposed later by dissolving the rubber surface.
• 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.
• Inner ring 30 and outer ring 8 Pipeline ends are protected from large deformation by inner ring 30 and outer ring 8.
• 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 ands for connecting the afjeacent pipeline by bracket clips. These rings are fastened to the flexible tubes 4 and 1 by screws 9.
• a single-wall pipeline 1 & 4 with a 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 or small holes 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 rotating bearing ring 35 is coupled to the cog- transporter 37 for transferring the movement from motor device into the pipeline rotation for 180 degrees, clock ⁇ wise and counterclockwise.
• Motor device is mounted and fixed 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 the variation of shotcreting position.

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)

Applications Claiming Priority (9)

Publications (1)

Family

ID=27451953

Family Applications (1)

Country Status (8)

Families Citing this family (3)

Family Cites Families (7)

• 1994
  • 1994-06-20 CZ CZ953370A patent/CZ337095A3/cs unknown
  • 1994-06-20 JP JP7502433A patent/JPH09504498A/ja active Pending
  • 1994-06-20 SK SK1634-95A patent/SK163495A3/sk unknown
  • 1994-06-20 AU AU71866/94A patent/AU7186694A/en not_active Abandoned
  • 1994-06-20 EP EP94920961A patent/EP0705213A1/en not_active Withdrawn
  • 1994-06-20 WO PCT/EP1994/002007 patent/WO1995000425A1/en not_active Application Discontinuation
  • 1994-06-20 CA CA002166098A patent/CA2166098A1/en not_active Abandoned
• 1995
  • 1995-12-15 NO NO955086A patent/NO955086D0/no unknown

Non-Patent Citations (1)

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