Classifications

• • 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
• • 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
  • E04G21/0418—Devices for both conveying and distributing with distribution hose
• • 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
  • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
  • B65G2207/28—Impact protection
• • 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
  • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
  • B65G2207/48—Wear protection or indication features

Definitions

• the invention relates to a conveyor tube for the transport of solids according to the features in the preamble of claim 1.
• Such a conveyor pipe is one of the prior art, for example, by DE 198 09 529 C2.
• This delivery pipe has in the region of the inlet-side coupling collar two wear rings arranged one behind the other.
• the delivery pipes are subject to wear during operation.
• inlet side of the tubular body of a delivery pipe increased wear is noted. This is much higher than the wear in the remaining area of a production pipe.
• the invention is therefore based on the prior art, the task of creating a conveyor tube for the transport of solids with increased service life.
• the delivery tube has a tubular body, which is equipped on both sides with coupling collars. These make it possible to assemble the delivery pipes to form a pipe string, whereby an exchange of individual delivery pipes from the otherwise remaining continuous pipe string is possible.
• a first wear ring and a second wear ring are provided one behind the other in the longitudinal direction of the tubular body.
• the crux of the invention consists in the fact that the second, inner wear ring has a length which is greater than or equal to half the inner diameter of the tubular body.
• the second wear ring whose length is equal to or greater than at least half the inner diameter of the tubular body.
• the use of the conveyor pipe according to the invention is consequently conveyor direction bound.
• the second wear ring is dimensioned so long that turbulence, which form on the inlet side because the inner circumference driven sludge of the conveyed material is sheared at the transition between two delivery pipes, have calmed down again within the zone of the second wear ring. Overall, the average service life of a conveyor tube can be significantly increased.
• the inlet-side coupling collar is dimensioned so long that it receives the first wear ring and the second wear ring and ensures a reliable fixation on the tubular body.
• the second wear ring should be at least 80 mm long. As a result, the inventively desired function of the second wear ring is reliably achieved.
• the second wear ring is made of steel, in particular hardened steel.
• the first muzzle side of the conveyor tube arranged wear ring consists of a wear and impact resistant material, such as a ceramic wear material, chromium carbide casting or martensitic nickel hard casting.
• the first wear ring and the second wear ring consist of different materials.
• the inner diameter of the first wear ring is dimensioned smaller than the inner diameter of the second wear ring.
• the inner diameter of the second wear ring is in turn dimensioned smaller than the inner diameter of the tubular body. Consequently, from the inlet side, the inner diameter of the conveying tube, starting from the first wear ring, increases beyond the second wear ring toward the tubular body, so that no projecting edges are present in the conveying direction. This measure supports laminar flow conditions within the pipe string and contributes to the reduction of wear.
• the conveying pipe according to the invention can be single-layered, particularly advantageously also double-layered.
• this consists of a highly wear-resistant, hardened inner tube and a pressure-resistant outer tube.
• the inner tube made of a hardened steel should oppose the transportable solid as long as possible and high wear resistance.
• the outer tube is opposite to the Inner tube softer and impact-resistant. This is particularly advantageous in terms of transport and the assembly and disassembly operations, since the delivery pipes are usually subjected to rough handling.
• the outer tube comes as shock and impact protection to a sheath function. For this it is sufficient to make the outer tube thin-walled.
• the inner tube and the second wear ring expediently consist of the same material.
• the wall thickness of the second wear ring should correspond to the wall thickness of the tubular body.
• the second wear ring has a wall thickness which is at least 30%, preferably 100% thicker than the wall thickness of the inner tube.
• Mounting technology is advantageous if a circumferential ring is provided on the inner circumference of the inlet-side coupling collar. This serves as a stop for the positioning of the first wear ring and the second wear ring within the coupling collar.
• the first wear ring and the second wear ring are each introduced from the opposing open sides of the coupling collar in this and then come to the ring to the plant.
• Front side on the inlet side coupling collar a radially inwardly directed circumferential collar is provided.
• the first wear ring is fixed in position in the coupling collar.
• the collar is produced by a material displacement or embossing of the front side of the coupling collar.
• first wear ring and the long second wear ring at the inlet end of the tubular body creates a significantly improved in terms of service life delivery tube.
• a wear ring may be provided at the outlet end of the tubular body to any signs of wear at the outlet end of the conveyor tube counteract.
• the delivery pipe according to the invention can manage without a wear ring at the outlet end of the tubular body. This contributes to a cost compensation for the additional costs incurred by the inventively provided long second wear ring on the inlet side.
• a practically further improvement of the conveying pipe according to the invention can be created by providing a layer of a heat-insulating material between the inner pipe and the outer pipe.
• This heat-insulating layer between the inner tube and the outer tube ensures that during the following welding operations, for example, to determine the coupling collars, adverse effects of heat are prevented from the inner tube.
• the layer between the inner tube and the outer tube is formed by a coating of a combustible non-metallic material applied to the outer surface of the inner tube and / or to the inner surface of the outer tube.
• a combustible non-metallic material applied to the outer surface of the inner tube and / or to the inner surface of the outer tube.
• an anticorrosion paint can be applied to the outer surface of the inner tube. The anti-rust paint burns when curing the double-layer pipe and forms the desired separation layer between the inner tube and the outer tube.
• FIG. 1 shows a conveyor pipe according to the invention in a longitudinal section
• FIG. 2 the outlet end of a second embodiment of a conveyor pipe according to the invention.
• FIG. 1 shows a conveying tube 1 with a double-layered tubular body 2, which consists of a highly wear-resistant hardened inner tube 3 and a pressure-resistant outer tube 4.
• the wall thickness of the inner tube 3 is si
• the wall thickness of the outer tube 4 is denoted by S 2 . It can be seen that the wall thickness Si of the inner tube 3 is greater than the wall thickness S 2 of the outer tube 4.
• a coupling collar 7 and 8 is fixed.
• a first wear ring 9 and a second wear ring 10 are received in the longitudinal direction of the tubular body 2 arranged one behind the other.
• the first wear ring 9 is made of a wear and impact resistant material, such as a ceramic material, chromium carbide casting, martensitic nickel hard casting (Nihard) or similar wear materials.
• the second wear ring 10 is made of hardened steel and has a length L which is greater than or equal to half the inner diameter ID of the tubular body 2.
• the length L of the second wear ring 10 is at least 62.5 mm. In practice, it can be assumed that the length L of the second wear ring 10 is preferably 80 mm or more.
• Both the coupling collar 7 and the coupling collar 8 has an end flange 11 and a nozzle 12, 13 extending in the direction of the tubular body 2.
• Each nozzle 12, 13 engages over the tube end 5 or 6 of the tubular body 2 and is welded with its end portion 14 and 15 via a weld 16 with the outer surface of the outer tube 4.
• At a distance from the end flange 11 is on the outer surface of the nozzle 12, 13 each provided a triangular in cross-section spacer ring 17.
• the outer diameter of the spacer ring 17 is dimensioned larger than the outer diameter of the flange 11, so that the spacer ring 17 protrudes slightly with its tip over the flange 11. In this way, stacked conveyor pipes 1 touch only selectively. Damage to a painted surface of the conveyor pipes 1 are avoided or reduced.
• a coupling groove 18 is formed between the flange 11 and the spacer ring 17, a coupling groove 18 is formed.
• a clamp not shown here for coupling the conveyor pipes 1 to a pipe string for engagement.
• the first wear ring 9 is made short and extends in the length range of the flange 11.
• the second wear ring 10 is made longer and has, as already mentioned, a length L which corresponds to at least half the inner diameter I 0 of the tubular body 2. Accordingly, the length Li of the coupling collar 7 is dimensioned so that the first wear ring 9 and the second wear ring 10 are received in the coupling collar 7, the coupling collar 7 with its end portion 14 still overlaps the tubular body 2.
• the inner diameter l D i of the first wear ring 9 is smaller than the inner diameter I D2 of the second wear ring 10, whereas the inner diameter I 02 of the second wear ring 10 is again smaller than the inner diameter ID of the tubular body 2. Consequently, the inner diameter of the delivery tube increases 1, starting from the first wear ring 9 via the second wear ring 10 to the tubular body 2 out. As a result, seen in the conveying direction FR protruding edges can be avoided, which supports laminar flow conditions within the pipe string and contributes to a reduction in wear.
• the wall thickness S 3 of the second wear ring 10 corresponds approximately to the wall thickness S 4 of the tubular body 2.
• a radially inwardly directed circumferential collar 20 is provided on the front side 19 of the coupling collar 7. This is generated by a material embossing on the front side 19.
• the collar 20 forms a stop and fixes the first wear ring 9 on the front side.
• a circumferential ring 21 is furthermore provided, which is arranged between the first wear ring 9 and the second wear ring 10.
• the ring 21 forms a stop for the wear rings 9 and 10, which are mounted in each case by the opposing openings of the coupling collar 7.
• the second wear ring 10 may be glued into the neck 13 of the coupling collar 7. Between the second wear ring 10 and the tubular body 2, a seal 22 is integrated.
• the layer 23 is made of a combustible non-metallic material, e.g. from a rust preventive paint, which has been applied to the outer surface of the inner tube 3 before being joined to the outer tube 4. Subsequently, the inner tube 3 is fixed by at least one hardening process in the outer tube 4. In this case burns the anti-rust paint and forms the layer 23.
• a combustible non-metallic material e.g. from a rust preventive paint

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)
• Pusher Or Impeller Conveyors (AREA)
• Belt Conveyors (AREA)
• Air Transport Of Granular Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38664030

Family Applications (1)

Country Status (8)

Families Citing this family (15)

Family Cites Families (12)

• 2006
  • 2006-08-21 DE DE102006038989A patent/DE102006038989B3/de not_active Expired - Fee Related
• 2007
  • 2007-08-03 US US12/374,596 patent/US7967031B2/en not_active Expired - Fee Related
  • 2007-08-03 KR KR1020087030041A patent/KR20090026761A/ko not_active Application Discontinuation
  • 2007-08-03 JP JP2009524894A patent/JP2010501790A/ja active Pending
  • 2007-08-03 CN CNA2007800015772A patent/CN101360671A/zh active Pending
  • 2007-08-03 RU RU2008131075/11A patent/RU2386577C1/ru not_active IP Right Cessation
  • 2007-08-03 WO PCT/DE2007/001385 patent/WO2008022616A1/de active Application Filing
  • 2007-08-03 EP EP07785689A patent/EP2054332A1/de not_active Withdrawn

Non-Patent Citations (1)

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