RU1803639C - Conveyer rubber-cable belt end connection - Google Patents

Abstract

SUMMARY OF THE INVENTION: The butt joint of the ends of a tape comprises an elastomer with cables. The cables are located in the same plane end-to-end between the upper and lower plates. A rubber layer is placed between the cables. The joints of the ends of the cables are located on the sides opposite from the middle of the butt section and symmetrically with respect to the middle, offset from the corresponding edge of the butt section by a distance equal to a quarter of the length of the joint. At the junction of the ends of the cable, the supporting elements are in the form of a rubberized fabric of. high modulus threads located along the butt section for 4 half the length of the joint. 3 ill.

Description

FIELD OF THE INVENTION The invention relates to conveyor transport and can be used for joining rubber bands and flat rubberized ropes during installation and replacements.

The purpose of the invention is to increase the durability of the compound.

In FIG. 1 shows a layout of the cables; in FIG. 2 is a longitudinal section: in FIG. 3 - cross section.

The butt joint of the tape contains cables 3 and 4, respectively, of ends A and B, laid in the same plane on a non-working rubber cover 2, which are covered by a working cover 1 from above, and the connection points of the cables 3 and 4 are wrapped around the perimeter with a high-strength rubberized fabric 5.

The transmission of tensile forces from the cables of one connected end to the cables of the second is carried out due to shear stresses in the rubber interlayers located between the cables of the connected

ends, as in the well-known and widely used cable strand connections, as well as in addition with a high-strength fabric, which wraps the butt joints of the cables. The tensile forces of the fabric from the cables are also transmitted due to the shear stresses of the rubber layer located between the surface of the cables and the fabric.

High-strength fabric increases the total tensile strength of the cables in tensile places at weakening, i.e. in cross sections at the junction points of the cables, end to end, approaching the tensile strength of the joint in these sections to the strength of the tape in its entirety.

In addition, the bearing bushings from the fabric practically exclude the concentration of stresses in the places of the cut of the cables, as well as the breakthrough of the ends of the cables through the protective rubber lining during bending of the tape.

Due to the fact that the transmission of force between the cables of the connected ends of the lenga is less than C

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cutting high-strength fabric, which wrapped the vengeance of their joints, is made evenly around the entire perimeter of the cable due to the fact that the thickness of the rubber layer between the fabric and the surface of the cable is the same over the entire circumference, a significant (several-fold) reduction in the length of the butt joint and increased durability due to lower shear stresses. jf

A feature of the joint is that in the joint there are as many cables as there are in the whole part of the tape, which ensures the constant flexural rigidity and linear mass of the tape along the length.

The essence of the invention is that the end-to-end end-to-end cable connections to each other are spaced alternately from the middle to opposite sides of the joint at a distance of one quarter of the length of the joint and wrapped around the perimeter with a high-strength rubberized fabric. In this case, the transfer of forces between the cables occurs as through the rubber layers located

between the cables of the connected ends, and

through layers of rubber located between the cables and the fabric with which they are wrapped at a length equal to half the length of the joint. Example. When connecting the ends of the rubber cable strip -type 2RTL-4000 using the proposed design, the ends of the tape are cut into lengths (and not 4000 mm as when using the traditional design) with a bevel of 16 °, releasing the cables from rubber. Solvent-free cables are coated with glue and dried. A lower rubber lining is applied to the lower part of the vulcanizing press, on which ends are chamfered on the rubber lining. Cable layout

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is made in accordance with the scheme (Fig. 1), wherein the joints are wrapped with strips of rubberized fabric with a strength of 1000 n / mm in width. The width of the strip is 35-40 mm, and the length is 500 mm. In addition, strips of crude layered rubber 4-5 mm thick are laid between the cables so that there are no voids between the cables and that all cables are laid parallel to the longitudinal axis of the tape.

After laying all the cables and filling all the voids with raw interlayer rubber, a working protective lining of the required thickness is applied on top, cut off all excess rubber on the sides and at the ends of the joint (chamfers), wrap the joint with a cloth, clamp it in a press and vulcanize at a temperature of 150 ° C for 30 min

The joint cooled to a temperature of not more than 70 ° C is released from the press. The conveyor is ready to go.

Claims (1)

SUMMARY OF THE INVENTION A joint of ends of a rubber-conveyor belt of a conveyor comprising an elastomer with cables located in the same plane between the upper and lower protective plates, and rubber interlayers between the cables, characterized in that, in order to increase durability and traction, it is provided with load-bearing elements in in the form of rubberized fabric from high-modulus threads, located with the coverage of the junction of the ends of the cables, while the ends of the cable are connected end-to-end and placed on the sides opposite to the middle of the joint and en- relatively said middle seam offset from the corresponding edges of the joint by a distance equal to a quarter of the junction length, and the supporting elements are made of length equal to half the length of the joint.