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乐清县日华液压机械厂研制成功的“DZAF安全三用阀”是该厂的专利产品。该产品是我国煤矿高档普采工作面单体液压支柱上的主要部件。它是在原DZF型三用阀的基础上,采用内、外系统互相牵制阻挡的原理,创新设计而成的一种安全型三用阀。该三用阀的开发成功,填补了国内该结构型式安全型三用阀的空白,对煤矿的安全生产和保护矿工的生命安全有重大意义。该三用阀技术先进,在意外情况
Yueqing County Rihua Hydraulic Machinery Factory successfully developed “DZAF safety valve” is the plant’s patented product. The product is China’s coal mine high-grade general mining face single hydraulic props on the main components. It is based on the original DZF-type three-way valve, the use of internal and external systems to contain the principle of each other to block, innovative design of a safety-type three-way valve. The successful development of the three-way valve fills the blank of the safety type three-way valve in China and is of great significance to the safe production of coal mines and the protection of miners’ lives. The three-valve advanced technology, in unexpected situations