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
  • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
  • F16G3/00—Belt fastenings, e.g. for conveyor belts
  • F16G3/10—Joining belts by sewing, sticking, vulcanising, or the like; Constructional adaptations of the belt ends for this purpose

Definitions

• the invention relates to a connection for the two ends of a steel cable conveyor belt which has a steel cable insert embedded in elastomeric material, which consists of steel cables running parallel in the longitudinal direction, the steel cable ends of the two belt ends being at least partially aligned with one another and with a longitudinal distance between them End faces arranged and coupled to each other by means of surrounding, extending in the longitudinal direction elastic elements.
• the conveyor belt After placing a steel conveyor belt on its carrying and guiding device, the conveyor belt must be made endless by connecting the two ends of the belt. It is customary to expose the rope ends of both belt ends and to arrange them in a finger-like manner. In the connection area, new rubber cover plates are vulcanized on both sides with the interposition of a rubber.
• the belt tensile forces are transmitted from one strength member (steel cables) to the other by shear stresses in the rubber. All ropes on one end of the belt are connected to ropes on the other end of the belt by vulcanization of the core rubber. The thickness of the core rubber remaining between the ropes is important for the fatigue strength of the connection and may be determined
• the force that can be transmitted between the wire ropes also depends on the rope surface.
• the distance between the ropes can be smaller than the Se L diameter.
• the rope ends are deflected in the connection area and placed ni nge. If the
• the overall connection is divided into several stages in order to distribute the rubber shear stresses as evenly as possible over the connection length and thus to increase the tensile strength of the connection.
• connections described are based on the adhesion between the outer surface of the ropes on the one hand and the elastomeric materials surrounding the ropes on the other hand.
• the adhesion enables the transmission of the longitudinal forces acting on the conveyor belt also in this connection area essentially via the wire rope reinforcements.
• the strength of the connection is therefore dependent on the mixture quality of the rubber used, its shear strength, the rope division and the
• Rope diameter and primarily depends on the quality and durability of the adhesive rubber-metal formation.
• a method for repairing a steel cable conveyor belt is known (EP-B-00 73 933), in which the damaged areas of the wire cables are cut out and in each case the two ends of a wire cable in the salmon are bordered and connected by the ends of an intermediate coil spring become.
• the coil spring is pushed onto the wire loins.
• In the connection area insectstre fen made of elastomeric material are placed between the ropes and the coil springs and then vulcanized compensation plates.
• the inserted coil springs are predominantly reinforcing and stiffening transverse to the direction of the tensile forces and are intended to prevent rope ends in the rubber from being destructive or being able to work their way out of the belt ends.
• the coil springs are considerably softer than the steel cables to be connected, even in multi-start versions.
• Belt longitudinal forces can only be insufficiently transferred from one strength member to the other due to the lengthening coil springs.
• the reinforcing effect in the longitudinal direction increases with increasing spring deformation with increasing deformation of the coil spring. For large deformations, such as those around the conveyor belt
• the invention has for its object to provide a connection of the type described above. which enables high traction power transmission and can be manufactured easily and quickly.
• the object is achieved by the features listed in the characterizing part of claim 1.
• End faces of the connected rope ends and the elastomeric material in the meshes of the braid braid support it resiliently.
• the elastomeric material is subjected to pressure when the conveyor belt is subjected to tensile loads because the diameter of the tubular braid is reduced and the diamond-shaped meshes become narrower.
• the mechanical deformation of the braid is limited by the resilient resistance of the nylon-shaped elastomeric material encompassed by the braid and the elastomeric material surrounding the wires or threads of the braid.
• the combined effect of tubular braid and elastomeric material leads to advantageous shock absorption in the conveyor belt.
• connection The greater tensile strength of the connection is attributed to the fact that the rope ends lying in the connections are now substantially included in the power transmission.
• the power transmission between the Wire loins are not interrupted. With the same total stress on the connection, the stress peak values are reduced.
• Another advantage of the invention is seen in the fact that the belt connection can be produced under practical pretensioning of the wire cables. This largely avoids blurring of the wire ropes in the connection.
• the higher tensile strength of the belt connection achieved by the invention can, in some applications, lead to a waiver of the steering controls in the connection outlet. This makes the connection easier for the user of the conveyor belt.
• there are also mixed forms of deflected wire loins and lumens arranged in alignment with one another, which are connected to a very braid-like braid, loins are conceivable in one connection.
• the braids are made of steel wire wire.
• Steel wire strands are suitable for different types of belt conveyor layers and have high strength and low elongation.
• the properties of steel wire bibs are very similar to the properties of steel cables. Steel wire bibs have good binding properties to the surrounding rubber.
• the braided fabrics are made of aramid textile threads.
• Aramid is a synthetic fiber made from highly aromatic polyamide with high strength and low elongation.
• a fine leek web made of aramide can meet the high requirements for conveyor belts with higher strength.
• the lay angle range of the tubular braid is selected from 15 to 25. The flatter the lay angle of the braid, the steeper the overall spring characteristic of braid, elastomeric material, cylinder and surrounding elastomeric material.
• the invention enables the operator of a conveyor system to create a tensile and permanent connection of a conveyor belt quickly and easily, since at least a part of the steel wire wire loins no longer has to be laboriously put into one another by deflections.
• the steel Idrahtsei loins are aligned in pairs and connected to each other, so that the rope ends contribute significantly to the transmission of traction.
• FIG. 2 shows a detail II from FIG. 1 on an enlarged scale
• FIG 3 shows a side view in longitudinal section through a coupling point of two opposing wire loins in the region of the belt connection point.
• the conveyor belt of which the two ends of the conveyor belt 11, 12 are indicated in FIG. 1, has a more rigid layer made of wire cables embedded in one plane in elastomeric material.
• the conveyor belt is via a three-stage connection 13 closed, in the rope ends 14 to 19 of both belt ends have different lengths.
• the rope ends 14, 15, 16 and 17, 18, 19 of each belt end 11 and 12 have three different lengths, which are arranged in a repeating order.
• the shortest cable end 14 or 17 of one end of the belt is in each case flush with a middle end 15 or 18 of the other end of the belt, forming a head gap 21 between the end faces.
• the opposite ends of the cable are each connected to one another by a cable gauze 22, which is shown in Lauchformi.
• the connection of the rope ends is explained in more detail using the enlarged representation according to FIG. 2.
• the aligned opposite cable ends 15 and 17 of the left and right belt ends 11 and 12 lie between two continuous cable ends 16 and 18 in this area.
• the end faces 23 and 24 of the cable ends 15 and 17 lie apart with a large head spacing 21 according to requirements .
• the ends of the tubular braid 22 are pushed onto the two rope ends 15 and 17.
• the number of wires or threads of the braid 22, their diameter, their type of material and their lay angle at which they run in the braid 22 are adapted to the operating conditions of the conveyor belt.
• the tubular braid 22 consists of eight intersecting steel wire rods 25, the
• Percussion in the unloaded state of the connection is 20.
• the diameter of the steel wire wire 25 is 0.9 mm in this example and the tensile strength of the steel used about 1,770 N / mm.
• the entire braid 22 has a tensile strength of 15 kN.
• the tubular braid 22 encompasses the rope ends 15 and 17 in their end sections 26 and 27, respectively. If the braid 22 is subjected to tension, the constricts
• the space 21 between the wire rope ends 15 and 17 (FIG. 3) is filled with a core rubber cylinder 28, in which the core rubber cylinder 28 is inserted into the tubular braid 22.
• the entire connected reinforcement insert is embedded in core rubber 29, core rubber strips being placed between the braids 22 and the rope ends. Then cover plates 31 and 32 are placed and the connection vulcanized.
• Rubber body 28 resiliently limits the compression of the braid 22.
• the rubber present in the mesh of the braid 22 resiliently supports the braid 22.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Belt Conveyors (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=6395653

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Citations (4)

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• 1989
  • 1989-12-18 DE DE19893941675 patent/DE3941675C2/de not_active Expired - Fee Related
• 1990
  • 1990-12-13 AU AU69546/91A patent/AU6954691A/en not_active Abandoned
  • 1990-12-13 EP EP19910900719 patent/EP0458927A1/de not_active Withdrawn
  • 1990-12-13 WO PCT/DE1990/000955 patent/WO1991009236A1/de not_active Ceased
  • 1990-12-14 ZA ZA9010061A patent/ZA9010061B/xx unknown
  • 1990-12-17 CS CS906309A patent/CS630990A2/cs unknown

Patent Citations (4)

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