Prestressed reinforced concrete pipe sealing ring

Abstract

The invention provides a high-performance prestressed reinforced concrete pipe sealing ring which has the characteristics of excellent tensile strength at break, elongation at break, compression permanent deformation and the like. The prestressed reinforced concrete pipe sealing ring designed by the invention has a unique glue material formula, and comprises the following main components in percentage by mass: 45-55% of natural rubber, 15-25% of N330 carbon black, 10-20% of CC (calcium carbonate) powder, 3-5 parts of solid coumarone resin, 4-6% of naphthenic oil, 2-2.5% of zinc oxide (99.7%), 1.5-2.3% of stearic acid 1801, 0.2-0.6% of anti-aging agent 2246, 0.2-0.4% of paraffin, 0.3-0.7% of polyethylene glycol PEB4000, and an accelerant and a vulcanizing agent, wherein the accelerant and a vulcanizing agent include 0.05-0.15% of M (2-mercaptobenzothiazole), 0.4-0.6% of DTDM ( 4,4'-dithiodimorpholine ), 0.05-0.15% of TMTD (tetramethylthiuram disulfide), 0.5-0.9% of CZ (N-cyclohexyl-2-benzothiazolylsulfenamide) and 0.2-0.4% of S. The prestressed reinforced concrete pipe sealing ring has the performance indexes as follows: the minimum elongation at break reaches 400%, the minimum tensile strength reaches 18.6MPa, the strength is more than or equal to 21mPa, the specific elongation is more than or equal to 500%, and the pressure deformation is less than or equal to 15%.

Description

technical field [0001] The invention relates to the technical field of rubber sealing, in particular to a prestressed reinforced concrete pipe sealing ring. Background technique [0002] Prestressed reinforced concrete pipe, English name Prestressed ConcreteCylinderPipe, referred to as PCCP, is a combination of high-strength steel wire tensile strength, concrete compression resistance and steel plate anti-seepage, fully and rationally utilizing the physical and mechanical properties of the materials. High-quality water pipes. PCCP is based on hydraulics, soil mechanics and material science. It is developed on the basis of the continuous improvement of the quality and optimization of the quality during the long-term production, testing and use of steel concrete and other building materials, as well as the increasingly mature prestressed concrete technology. . [0003] The long-term use experience of foreign developed countries and countless practices of rapid promotion in d...

AI Technical Summary

Problems solved by technology

[0004] Sealing rings used for prestressed reinforced concrete pipelines have greater requirements on the vulcanization speed of the product due to the large size of the product. Performance requirements such as elongation and compression set are relatively strict. Based on the above-mentioned process and basic physical properties, the present invention intends to provide a high Performance of Prestressed Reinforced Concrete Pipe Seals

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