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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
  • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
• • 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
• • 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
  • B65G53/523—Wear protection
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
  • E04G21/04—Devices for both conveying and distributing
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
  • E04G21/04—Devices for both conveying and distributing
  • E04G21/0418—Devices for both conveying and distributing with distribution hose
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/12—Flanged joints specially adapted for particular pipes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
  • F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
  • F16L47/24—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics for joints between metal and plastics pipes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
  • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L9/00—Rigid pipes
  • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
  • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
  • F16B7/02—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections with conical parts
  • F16B7/025—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections with conical parts with the expansion of an element inside the tubes due to axial movement towards a wedge or conical element
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
  • F16C2226/10—Force connections, e.g. clamping
  • F16C2226/16—Force connections, e.g. clamping by wedge action, e.g. by tapered or conical parts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
  • F16C2226/50—Positive connections
  • F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut connections

Definitions

• the invention relates to a transport pipe for thick materials, in particular for concrete.
• Mobile concrete pumps are widely used in the construction industry, with which concrete is conveyed from a feed point via transport pipes to a spreading point at the construction site.
• the transport pipes are usually located on the mast arms of a placing boom, which can be directed to the concreting point with its end hose via remote control.
• applications using stationary concrete pumps are known in which the transport pipes are laid in an earth-proof manner from the application point to the application point.
• the transport pipes must be made from a low-wear material. Steel pipes are usually used for this purpose, which are hardened on the inside or coated to reduce wear.
• the invention has for its object to develop a transport tube for thick materials, in particular for concrete, which is relatively light and yet resistant and is therefore particularly suitable for mobile use.
• the solution according to the invention is based on the idea that a pipe with a low structural weight can be developed by means of a suitable composite material, which nevertheless has sufficient stability and abrasion resistance for concrete with high bending rigidity.
• a pipe with a low structural weight can be developed by means of a suitable composite material, which nevertheless has sufficient stability and abrasion resistance for concrete with high bending rigidity.
• An inner tube made of abrasion-resistant plastic, especially polyurethane,
• the radially projecting collar of the collar element is delimited by an annular end face and a ring step adjoining it radially towards the inside of the pipe and axially recessing from the end face, and wherein the plastic material of the inner pipe engages in the ring step from the inside of the pipe.
• the transport pipes according to the invention are connected to one another in pairs on their facing frets by means of clamp-like pipe connectors.
• an inclined or curved transition surface on the collar adjoins the recessed boundary surface of the ring step in the axial direction, which extends up to the inner radius of the inner cylindrical shoulder and if the inner surface of the cylindrical inner tube has an opening slope or curvature that diverges towards the end face of the collar made sure that the Flow forces of the incoming thick material are converted into pressure forces between the inner tube and the collar element, which counteract detachment of the inner tube.
• a further important aspect of the invention consists in that no undesired changes in length can be caused by a positive connection between the reinforcement sleeve and the collar element due to axial forces acting on the tubes. To achieve this, the invention proposes
• the ring shoulder of the collar element has an outer surface with an outer diameter that varies in the axial direction
• the reinforcement sleeve is formed by a fiber structure which is wound tightly coherently on the outside onto the inner tube and the ring shoulder of the collar element and is embedded in a plastic matrix and which is positively and optionally materially connected to the outer surface of the ring shoulder.
• a particular advantage of the transport pipe according to the invention is that it has a particularly low structural weight and yet has sufficient flexural strength and compressive strength.
• the fiber structure is designed as a fiber strand, fiber tape, fabric tape or mat,
• the fiber structure contains fiber material from the group of carbon fibers, glass fibers, aramid fibers and / or polyester fibers, that the fiber structure has axially placed cross layers and / or radially placed circumferential layers,
• the ring shoulder has a wave-like shape in the axial direction
• the ring shoulder has a trapezoidal, step-shaped, groove-shaped or knurled shape in the axial direction
• outside wave contour has a wave trough radially recessing directly axially adjoining the collar
• Adequate abrasion resistance to abrasive thick materials is achieved if the inner tube is made of polyurethane, for example with a Shore A hardness of 85 to 95. It is particularly advantageous if the inner tube is preferably cast onto the collar element via an adhesion promoter or primer applied to the collar element.
• the fiber strand embedded in the plastic matrix can also be cohesively connected to the inner tube and / or to the collar element, forming a closed reinforcement sheath, if necessary via an adhesion promoter.
• the plastic matrix suitably consists of a reaction resin from the group consisting of epoxy resin, polyester resin, vinyl resin or a thermoplastic resin. The task of the plastic matrix is to support the fibers and to distribute the forces acting on the tube to them.
• the transport pipes according to the invention are suitable for use in mobile or stationary concrete pumps with concrete placing booms or long transport routes which require a large number of transport pipes.
• the transport pipes according to the invention can be made several times longer than the known transport pipes with the same weight. This considerably simplifies handling during assembly and when laying the pipes.
• 1 shows a section through a straight transport tube with various collar elements.
• 2 shows a pipe bend with the same collar elements;
• FIG. 3 shows an enlarged section of a transport tube with a collar element
• Fig. 5 shows a section through a pipe bend made of steel with an inner tube and collar elements welded on the end.
• the composite pipes shown in the drawing are intended as transport pipes for thick materials, in particular for concrete, for use in concrete pumps.
• the transport tubes essentially consist of an inner tube 10 made of abrasion-resistant plastic, for example made of polyurethane, collar elements 12 arranged at the end and a reinforcing sleeve 14 surrounding the inner tube 10 and connected to this and the collar element.
• the annular collar elements made of metal have a collar which projects radially at the end 16 and an axially adjoining ring extension 18 concentric with the inner tube 10.
• the collar is intended to join two transport pipes together by means of a suitable pipe connector that crosses the collar and bridges a separation gap from the outside, while the ring extension 18 provides a tight and permanent connection between the collar element 12 and the other parts of the transport pipe ( Inner tube 10 and reinforcement sleeve 14) should ensure.
• a special feature of the embodiments shown in the drawing is the connection points between the collar element 12 and the inner tube 10 shown on the left in FIG. 1 and in FIGS. 2 to 5.
• the radially projecting collar 16 is there by an end-face annular surface 20 and a self adjoining it radially towards the inside of the tube and delimiting ring step 22 axially from the end face 20, the plastic material of the inner pipe 10 engaging from the inside of the pipe into the free area 24 delimited by the ring step 22 of the collar.
• the plastic material completely fills the free area 24 and forms an end face portion 26 which adjoins the end face 20 of the collar radially inward.
• the inner surface of the cylindrical inner tube 10 also has an opening bevel 32 which diverges in a trumpet-like manner towards the end surface portion 26.
• the collar element 12 has an axially undulating outer surface 34 on the ring extension 18, while the reinforcing sleeve 14 is wound in the circumferential direction by a tightly coherent outer surface on the inner tube 10 and the undulating ring extension 18.
• carbon fiber strand (roving) embedded in a plastic matrix is formed.
• the wound carbon fiber strand is connected to the undulating outer surface 34 of the ring extension 18 in a materially and form-fitting manner.
• the ring shoulder Towards its free end 36 facing away from the collar 16, the ring shoulder has sharp edges, so that a smooth transition of the wound reinforcement cover 14 is ensured (cf. FIG. 3).
• the outside wave contour 38 of the ring shoulder 18 becomes flatter towards its free end.
• the successive wave crests 38 the Shaft contour 38 has a radial height that decreases toward the free end of the ring extension 18.
• a sharp-edged radially recessed wave trough 40 to which two wave crests 38 separated from one another by another wave trough 42 are connected up to the free end 36 of the ring shoulder.
• a further improvement in this regard is achieved in that the inner tube is cast onto the collar element 12 in the course of the production, preferably via an adhesion promoter or primer applied to the inner surface of the ring extension 18, while the carbon fiber strand embedded in the plastic matrix forms a closed reinforcement shell on the outside is integrally connected to the ring shoulder and to the inner tube.
• the collar element shown at the left end is provided with a wavy ring extension 18.
• the collar element 44 shown on the right has no corrugated structure on its ring extension 46. With its cylindrical ring shoulder 46, it is glued on the outside with an adhesive layer 48 to the reinforcing sleeve 14 of the transport tube.
• This construction is expedient if an exact adjustment of the tube length is desired, which can be achieved by the collar element 44 being subsequently glued to the tube piece that is still open in a defined position.
• the reinforcement sleeve 14 consists of a tube or pipe bend made of steel.
• the collar elements 12 are butt welded there with their rear ring shoulder 18 at the end of the steel tube.
• the inlet and outlet side of the collar 16 and the inner tube 10 are formed in the area of the ring step 22 similarly as in the exemplary embodiment according to FIG. 3.
• a suitable design in the area of the end face parts 20, 26 ensures that the flowing past Liquid concrete does not exert any material-lifting shear forces at the point of separation between the inner tube 10 and the collar element 12.
• the transport tube according to the invention is produced in the following process steps:
• At least one prefabricated, metallic collar part provided with a collar and a corrugated ring attachment on the outside is placed on the end face in a casting mold and poured out there with a reaction plastic which is abrasion-resistant in the hardened state, forming an inner tube with an end collar;
• the finished inner tube with collar is wrapped with a plastic-soaked carbon fiber strand from one end to the other wrapped around the outside of the wave-shaped ring insert and forming a coherent reinforcement sleeve;
• the finished transport tube is temporarily heated to harden the plastic matrix and / or to establish a material connection with the inner tube and the collar element.
• the collar element is coated on its contact surfaces with the inner tube before the casting process with an adhesion promoter or primer.
• the inner tube and / or the collar element can also be coated with an adhesion promoter or primer on its contact surfaces with the jacket tube before the winding process.
• the carbon fiber strand can, for example, be wound around its tube axis with a multi-axis winding machine while rotating the inner tube.
• the inner tube with collar is expediently attached to a winding core in a rotationally fixed manner, while the winding core is rotated by a motor around the axis of the inner tube during the winding process.
• the transport tube is produced in the following process steps:
• At least one prefabricated collar element provided with a collar and a corrugated ring extension on the outside, is wrapped with a plastic-impregnated carbon fiber strand to form a CFRP tube;
• an undersize core can be inserted into the interior of the CFRP tube provided with the at least one collar, leaving an annular gap free, the reaction plastic being introduced into the annular gap and cured there, and the core then being removed again.
• reaction plastic is sprayed or spun onto the inner surface of the CFRP tube provided with the at least one collar and then cured to form the finished tube. In the latter case, no core is required.
• the invention relates to a transport pipe for thick materials, in particular for concrete.
• the transport tube comprises an inner tube made of abrasion-resistant plastic, at least one metallic collar element 12 fixed to the end on the outside of the inner tube 10 as well as a reinforcing sleeve 14 which at least surrounds the inner tube and is connected to this and the collar element.
• the radially projecting collar of the collar element is limited by an annular end face 20 and an adjoining radially after the tube interior, axially recessed ring step 22 from the end face, the plastic material of the inner tube 10 from the tube interior engages in the ring stage 22.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Rigid Pipes And Flexible Pipes (AREA)
• On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
• Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
• Pipeline Systems (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=33482258

Family Applications (1)

Country Status (9)

Cited By (3)

Families Citing this family (37)

Citations (10)

Family Cites Families (16)

• 2003
  • 2003-05-27 DE DE10324321A patent/DE10324321A1/de not_active Withdrawn
• 2004
  • 2004-05-14 DE DE502004008610T patent/DE502004008610D1/de not_active Expired - Lifetime
  • 2004-05-14 KR KR1020057017303A patent/KR20060015475A/ko not_active Withdrawn
  • 2004-05-14 CN CNA2004800062816A patent/CN1759269A/zh active Pending
  • 2004-05-14 AT AT04732960T patent/ATE388367T1/de not_active IP Right Cessation
  • 2004-05-14 JP JP2006529812A patent/JP2007503563A/ja not_active Withdrawn
  • 2004-05-14 ES ES04732960T patent/ES2300774T3/es not_active Expired - Lifetime
  • 2004-05-14 AT AT07119140T patent/ATE416340T1/de not_active IP Right Cessation
  • 2004-05-14 EP EP04732960A patent/EP1627176B8/de not_active Expired - Lifetime
  • 2004-05-14 DE DE502004006419T patent/DE502004006419D1/de not_active Expired - Lifetime
  • 2004-05-14 WO PCT/EP2004/005163 patent/WO2004111518A1/de not_active Ceased
  • 2004-05-14 US US10/542,730 patent/US8074686B2/en not_active Expired - Fee Related
  • 2004-05-14 EP EP07119140A patent/EP1881254B1/de not_active Expired - Lifetime
  • 2004-05-14 ES ES07119140T patent/ES2317626T3/es not_active Expired - Lifetime

Patent Citations (10)

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