Recently, the first ultra-high pressure hydraulic hose test system in the coal industry was built and put into use in China Coal Science and Technology Co., Ltd. The completion of the test system has filled the gap in the analysis and verification capability of the safety performance of the ultra-high pressure medium conveying system supporting the mining water jet slotted fracturing device, marking that the coal industry has the blasting performance of the hydraulic hose with a design working pressure of 100MPa , The ability to analyze and verify pulse performance can play an important role in the reliable application of mine water jet slotted fracturing devices and in ensuring the safe production of coal mines.
Hydraulic support hose test system is mainly used for analyzing and verifying the pressure-bearing performance of hydraulic support hoses used in coal mines, and can test its blasting performance, pulse performance and other items according to relevant standards. The conventional hydraulic support hose test system has a maximum burst pressure of 250MPa, and the pulse test device has a maximum test pressure of 80MPa. The pulse waveform can only output square waves, and it does not have the pulse performance and burst performance for other complex working conditions and ultra-high pressure hydraulic hoses. Performance analysis and verification restricts the popularization and application of mine water jet slotted fracturing devices in the fields of shale gas exploitation and coal mine gas drainage. The ultra-high pressure hydraulic hose test system built and put into use this time is mainly composed of a 500MPa ultra-high pressure blast test bench and a 200MPa ultra-high pressure pulse test bench, which can not only meet EN856, GB/T10544-2022, GB/T3683-2011 , MT/T98-2006 and other European standards, national standards, and industry standards for pulse test and blasting test analysis and verification requirements, and the 200MPa ultra-high voltage pulse test bench with a pulse frequency range of 0.005Hz~1.5Hz in the system can be output in strict accordance with the pulse test requirements Square wave, peak wave and programmable waveform can conduct more scientific and comprehensive analysis and verification of the safety performance of hydraulic hoses for different purposes and different working conditions.
Ultra-high pressure hydraulic hose test system is one of the key technical equipment in the National Development and Reform Commission's "Laboratory for Analysis and Verification of Safety Access of New Mining Equipment and New Materials" undertaken by the China Academy of Coal Sciences. Strong ability, high test repeatability, good stability and other technical advantages. Since the system was put into use, it has successfully tested the blasting performance and pulse performance of the 100MPa hydraulic hose commissioned by SPIR STAR Druckschlauche AG and Hebei Zhengyu Pipe Industry Technology Co., Ltd., on the basis of fully verifying the safety performance of the high-pressure medium delivery device , to ensure that its application in coal mines is safer and more efficient. With the in-depth development of coal mining technology, in the future, the system can bring changes to the safety performance analysis and verification of ultra-high pressure medium conveying systems, and can provide strong technical support for promoting the digital, intelligent, and complete development of coal equipment in my country.
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