Automatic control method and automatic control device of water valve of surface treatment rinsing bath
An automatic control device and surface treatment technology, applied in the direction of non-electric variable control, multi-fluid ratio control, ratio control, etc., can solve problems such as unsatisfactory water-saving effects, and achieve significant water-saving and environmental protection significance and social benefits. The effect of the economic effect
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[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:
[0017] Such as figure 1 As shown, the automatic control device for the water valve of the surface treatment washing tank in the first embodiment adopts a dual-probe PH controller of model OPM223. The two probes are respectively placed in the appropriate positions in the washing tank after degreasing and the washing tank after phosphating. Connecting with the PH controller will detect the PH value of the washing tank. The PH controller will be connected with the electronically controlled water valve switch to output a control signal to control the water valve switch when the measured PH value reaches the set value.
[0018] The electronically controlled water valve switch includes intermediate relays KA1 and KA2 and water valves YV1 and YV2 with a 24V DC voltage. The 220V AC external to the water valve is rectified to 24V DC to ensure that the lines from...
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