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The three loop of the hydraulic hose crimping machine system

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The three loop of the hydraulic hose crimping machine system
(1) hydraulic hose crimping machine unloading loop
Constitute the circuit of an overflow valve and a two position four way electromagnetic valve. Start the hydraulic pump, two position four way electromagnetic valve in normal in unloading condition, the output of the hydraulic pump all through the electromagnetic valve oil return tank.
When the electromagnet 7YA was electric, the electromagnetic valve is in working condition, adjust the relief valve to the pressure of work. The valve is convenient, the circuit using blocking two position four way electromagnetic valve A, B export to replace the two position two way valve, two are completely equivalent.
(2) the speed control loop
Speed control loop adopts the entrance throttle governing circuit, easy to use pressure relay pressure control; the control method has the advantages of convenient adjustment, energy saving, flow into the hydraulic cylinder by the throttle valve, can reduce starting impact, bending, requirements of the hydraulic cylinder of the lower speed, the entrance throttle governing circuit can be conveniently to achieve this requirement.
(3) pressure retaining loop
In the circuit are respectively arranged in a double liquid control one-way valve, when the loop of the electromagnetic valve is in place, so that can keep the pressure of hydraulic cylinder. Considering the leakage problem of hydraulic cylinder, in the loop with the accumulator, to compensate for the amount of leakage. Attention is required, use electromagnetic reversing valve, considering the double liquid control one-way valve control chamber oil mouth does not have pressure, electromagnetic valve in a function must be used "Y" type, and the one-way throttle valve should be installed in close proximity to the cylinder side.