Impact-resistant conveying belt

Abstract

The invention discloses an impact-resistant conveying belt, and belongs to the technical field of conveying belts. The impact-resistant conveying belt comprises an upper covering layer, a lower covering layer, a skeleton layer and a side adhesive layer, wherein the upper covering layer and the lower covering layer are made of rubber with the tearing strength larger than or equal to 120 N / mm, abrasion smaller than or equal to 80 mm<3> and the rebound rate larger than or equal to 25%; the skeleton layer is made of canvas, the warp twist of the canvas is 5 twists per 10 centimeters, the elongation at break is larger than or equal to 18%, the curvature is larger than or equal to 5%, the weft twist is 10 twists per 10 centimeters, the density is 75+ / -2 pieces per 10 centimeters, the average breaking strength is larger than or equal to 155 N / mm, the minimum breaking strength is larger than or equal to 145 N / mm, and the 10% elongation rate under constant load is larger than or equal to 5%; and the skeleton layer is bonded by using bonding rubber with the rebound rate larger than or equal to 25%, the hardness smaller than or equal to 50 IRHD and the thickness larger than or equal to 1.3 mm. According to the impact-resistant conveying belt, the kinetic energy absorption and buffering capacity of the covering layers is improved, and the impact resistance, wear resistance and tear resistance are improved; the longitudinal elasticity, transverse elasticity, strength, elongation rate, tearing force and impact strength of the skeleton layer are improved; and the kinetic energy absorptionand buffering capacity of the skeleton layer is improved, so that the service life of the conveying belt is prolonged to be longer than 2.5 times.

Description

technical field [0001] The invention belongs to the technical field of conveyor belts, in particular to a crush-resistant conveyor belt. Background technique [0002] The conveyor belt is suitable for the transportation of powdery and blocky materials between various processes and sections. It is convenient and fast, and has high production efficiency. It is a necessary means for continuous transportation of modern large-scale production of materials. [0003] The existing conveyor belt is composed of an upper covering layer, a skeleton layer, a lower covering layer and edge rubber layers on both sides of the skeleton layer. The upper covering layer and the lower covering layer are made of rubber materials. The main pulling force during the operation of the tape, the upper and lower covering glue plays the role of protecting the skeleton layer. In the process of quarry mining, ore inlet of cement plant, limonite screening, etc., due to the reasons of high material density, ...

AI Technical Summary

Problems solved by technology

[0007] (3) Skeleton layer. At present, EP200 dipped canvas is the main one. According to different needs of users, through stacking, skeleton layers with different levels of strength are formed, which account for about 70% of the total consumption of skeleton layer canvas in layered conveyor belts. , under normal circumstances, according to the GB / T7984 standard for production, the highest warp crimp rate is only 3.5%. With the intensification of internal competition in the industry and the lack of index assessment, the crimp rate of products produced by some manufacturers is only 2%. The direction elasticity is seriously insufficient and cannot withstand the violent impact of the material. Some products will break after being impacted by the material several times in a short period of time, causing the broken belt to stop production. The lateral strength is only 50-75N / mm, the lateral strength after superimposing 4 layers of canvas is only 200-300N / mm, and the lateral strength after superimposing 5 layers of canvas is only 250-350N / mm, which is completely unsuitable for mines, cement plants, limonite and other enterprises Relevant process requirements

[0008] The existing GB / T7984-2013 adhesive tape standard can no longer meet its requirements. Its cover adhesive only stipulates conventional requirements such as tensile strength, elongation at break, and abrasion, but does not specify the tear performance, impact elasticity, etc. of the rubber material; The framework layer only stipulates the requirements for warp strength and warp elongation, but does not specify the requirements for warp crimp, transverse strength, and transverse elongation of the framework layer, which will cause the belt to be transversely damaged after the sharp material falls from a high altitude and impacts the conveyor belt. Tear; Relatively speaking, the skeleton layer is made of fiber, its rigidity is much higher than that of rubber, and its ability to absorb kinetic energy is weak. After market research and user visits, it is found that the covering rubber is torn, worn, holes, and the longitudinal skeleton Problems such as tearing caused the tape to be damaged after a short period of use and needed to be replaced. To address such problems and meet the user's product requirements, the conveyor belt needs to be improved

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