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我厂生产的DZF三用阀与单体液压支柱配套用于采煤工作面。在生产DZF三用阀时,用ZS—4型支柱试验机进行调试和检验。由于DZF三用阀的调试压力为30MPa—50MPa的高压,每班工作有100—300多次的升压和降压,试验机内原有焊接而成的蓄压器难于承受,焊缝常因疲劳产生裂纹而泄漏,必需将蓄压器拆下,重新焊接修复,而且常频繁进行,影响生产。为此我厂将蓄压器结构改为用螺纹联结,不需焊接。改进后,经过一段时间试用,工作压力稳定,效果良好。
I plant the DZF three-valve and supporting the hydraulic prop for coal mining face. In the production of DZF three-valve, with ZS-4-type pillar testing machine for testing and testing. As the DZF three-valve debugging pressure of 30MPa-50MPa high pressure, each class has 100-300 times the pressure and step-down, the original test machine within the pressure vessel is difficult to withstand the weld often fatigue Cracks and leaks, the pressure accumulator must be removed, re-welded repair, and often frequent, affecting production. For this reason, our factory will replace the pressure accumulator structure with a threaded connection without welding. After the improvement, after a period of probation, the work pressure is stable and the effect is good.