Ultra high pressure hose is animportant part of the ultra high pressure cleaning machine(www.dsedh.com), which is animportant part of the nozzle and the high pressure pump. The can production andensure that quality of ultra high pressure hose is generally less than 1500bar,is higher than the pressure of the ultra-high pressure hose domestic nosuccessful production case, ultra-high pressure hose is connected ultra highpressure cleaning machine nozzle and the important component of thehigh-pressure pump, have great effect on the washing machine, here are a superhigh pressure hose production need to overcome what kind of technicaldifficulties.
(1) the problem of steel wirereinforcement
Ultra high pressure hoses need, theliner outer surface evenly woven layer 4 wire above, and to ensure that in theuse of process layer of steel wire does not stack and firmly with inner andouter layer is closely bonded, domestic at present, this problem has not thebetter solution. Compared with the same grade of imported hoses, the steel wiremade of domestic hose is of poor rigidity, large diameter and low evenness.
(2) the problem of lining materials
In the cleaning operation, the demandfor the length of tens of meters above the ultra high pressure hose is verycommon. Due to the relatively poor domestic hose lining material flexibility,comprehensive mechanical performance is not high that cannot guarantee the longdistance within the liner tube wall of uniform and density of quality, so thedomestic production of ultra-high pressure hose always can not meet therequirements.
Ultra high pressure hose is subject tofrequent, intense pressure impact will lead to burst. Avoid in operation, thetubing will repeatedly oil pressure suddenly increased or decreased, whichformed the super high-pressure hose frequent shock, leading to the seal damageintensifies, ultra high pressure hose foaming and rupture and pipe joints looseleakage phenomenon. Therefore, in operation, the valve stem can not be toohard, must be gentle. Engineering machinery, hydraulic system power loss due tothe heating oil, and on the outside temperature effect can make a sharp rise inoil temperature. The higher the temperature, the higher the temperature of thesuper high pressure hose, the more vulnerable to aging, poor flexibility,strength and sealing performance, ultra high pressure hose will soon burst.Therefore, in the operation, when the hydraulic system temperature rise toohigh, too fast, should be identified in a timely manner, to be ruled out;summer operations, especially in continuous operation, should take thenecessary cooling measures.