Intelligent water control equipment for intermittently countercurrent rinsing plating articles and automatic water control method thereof

Patent metadata

Field	Value
Publication number	US-2018245233-A1
Application number	US-201715693826-A
Country	US
Kind code	A1
Filing date	Sep 1, 2017
Priority date	Feb 27, 2017
Publication date	Aug 30, 2018
Grant date	—

Abstract

The disclosure provides an intelligent water control equipment for intermittently countercurrent rinsing plating articles, comprising: a multi-stage countercurrent rinse tank, a PLC automatic control system, a liquid level sensor, a water supply pump, a water discharge pump, a water inlet pipe and a water output pipe; the multi-stage countercurrent rinse tank is composed of n rinse tanks connected in series, the water inlet pipe of a preceding-stage rinse tank is connected with the water outlet pipe of a next-stage rinse tank, rinse water is conveyed to the final-stage rinse tank through the water supply pump, the water flow direction is opposite to the movement direction of plating articles; signals of the liquid level sensor and a conductivity electrode are input to the PLC automatic control system.

First claim

We claim:

1 . An intelligent water control equipment for intermittently countercurrent rinsing plating articles characterized in that: the intelligent water control equipment comprises a multi-stage countercurrent rinse tank, a PLC automatic control system, a liquid level sensor, a water supply pump, a water discharge pump, a water inlet pipe and a water output pipe; the multi-stage countercurrent rinse tank is composed of n rinse tanks connected in series, n being a natural number greater than 2 but less than 10, representing a first-stage rinse tank, a second-stage rinse tank . . . a final-stage rinse tank in turn, the water inlet pipe is arranged on the top part of each stage of rinse tank, the water outlet pipe is arranged on the bottom part of each stage of rinse tank, the water inlet pipe of a preceding-stage rinse tank is connected with the water outlet pipe of a next-stage rinse tank, rinse water is conveyed to the final-stage rinse tank through the water supply pump, the water flow direction is opposite to the movement direction of plating articles; an emptying valve is arranged on the bottom part of each stage of rinse tank and is connected to an emptying pipe, through which the rinse water in the rinse tank is emptied;
electromagnetic valves are arranged on both the water inlet pipe and the water outlet pipe, the liquid level sensor is arranged on the bottom part of each rinse tank, the top part of the final-stage rinse tank is also provided with a liquid level sensor, a conductivity electrode is arranged in the second last stage of rinse tank, signals of the liquid level sensor and the conductivity electrode are input to the PLC automatic control system, and a signal output end of the PLC automatic control system is electrically connected with a control circuit of the water supply pump and the water discharge pump.

2 . The intelligent water control equipment for intermittently countercurrent, rinsing plating articles according to claim 1 , characterized in that a flow meter is equipped between two adjacent stages of rinse tanks or a delivery pump adopts a flow pump.

3 . The intelligent water control equipment for intermittently countercurrent rinsing plating articles according to claim 1 , characterized in that the rinse tank is of anticorrosion steel structure.

4 . The intelligent water control equipment for intermittently countercurrent rinsing plating articles according to claim 1 , characterized in that the first-stage rinse tank is further provided with a detergent feeding device.

5 . The intelligent water control equipment for intermittently countercurrent rinsing, plating articles according to claim 1 characterized in that the PLC automatic control system comprises a control module, a display screen, a power module and a monitoring module; the control module and the monitoring module are electrically connected with each other, signals of the liquid level sensor and the conductivity electrode are input to the monitoring module of the PLC automatic control system, so that the PLC automatic control system collects the information sensed by the conductivity electrode and the liquid level sensor in time and then transmits the signal to the control module of the PLC automatic control system, a signal output end of the control module is electrically connected with the control circuit of the water supply pump and the water discharge pump to control the switch of each water supply pump so as to realize automatic control of water supply and discharge; meanwhile, the control module also controls the automatic operation of the system; the control module, the display screen and the monitoring module all are powered by the power module, and the signal received by the control module is synchronously displayed through the display screen.

6 . A use method of the intelligent water control equipment for intermittently countercurrent rinsing plating articles described in claim 1 , characterized in that the method comprises the following steps:
1) at the initial stage of rinsing, what in each stage of rinse tank being rinse water, feeding detergent to the first-stage rinse tank, the detergent being a mixed liquor composed of absolute ethyl alcohol, isopropyl alcohol dimer fatty acid and amine phosphate, with a mass ratio of 7:2:1:1, the dosage of the detergent being 0.1-1.2 g/L, best 0.4 g/L, wherein, as rinsing time increases, the concentration of each stage of rinse tank increases gradually; 2) when the conductivity of the second last stage of rinse tank reaches a preset upper limit, the conductivity electrode transmitting a signal to the PLC automatic control system, the PLC automatic control system triggering the program of automatic water change to start changing water, and, feeding one time detergent to the first-stage rinse tank each time water is changed; the system first automatically opening the water discharge pump of the first-stage rinse tank to discharge the rinse water in the first-stage rinse tank; after the first-stage rinse tank is emptied, totally inputting the second-stage rinse water to the first-stage rinse tank through the PLC automatic control system, latter stages of rinse tanks changing water in turn, and, when the final-stage rinse tank is emptied, triggering the water supply pump to infuse clean rinse water to the final-stage rinse tank, the water supply pump being connected with a normal-temperature water tank and a hot water tank respectively for alternately supplying normal-temperature water and hot water, the temperature of the normal-temperature water being 20±5° C. and the temperature of the hot water being about 80±10° C.; 3) when the final-stage rinse tank is full of rinse water, triggering the liquid level sensor arranged on the top part, the liquid level sensor transmitting a signal to the PLC automatic control system, and the PLC automatic control system triggering the water supply pump to stop supplying water, the system being capable of monitoring the water flow of water change of each stage of rinse tank and finding the leakage and venting condition of rinse water in time; 4) when inspecting and debugging the device, changing the PLC automatic control system to manual control, so that the rinse water may be emptied manually through the emptying valve to facilitate equipment repair.

7 . The use method of the intelligent water control equipment for intermittently countercurrent rinsing plating articles according to claim 6 , characterized in that the amine phosphate is acidic amine phosphate,

8 . The use method of the intelligent water control equipment for intermittently countercurrent rinsing plating articles according to claim 6 , characterized in that the preparation method of the detergent is: taking absolute ethyl alcohol, isopropyl alcohol, dimer fatty acid and acidic amine phosphate according to the mass ratio; pumping the dimer fatty acid into a blending kettle to heat to 35 to 4° C., then adding the acidic amine phosphate to stir for to 1 to 5 min, next adding the absolute ethyl alcohol and the isopropyl alcohol, mixing thoroughly, ready to use.

Assignees

• South China Inst Environmental Sciences Mep
• Nanjing University Of Technology

Inventors

• Du Jianwei
• Wen Yong
• Liu Fuqiang
• He Kuang
• Zhao Wei
• Zhang Mingyang
• Li Aimin
• Ma Ying

Classifications

• C11D7/261

  Alcohols; Phenols · CPC title

• C25D21/08 Primary

  Rinsing · CPC title

• C11D7/36

  containing phosphorus · CPC title

• B08B3/102

  with means for agitating the liquid (by agitating the container B08B3/042, B08B3/044, B08B3/045, B08B3/06) · CPC title

• B08B3/08

  the liquid having chemical or dissolving effect · CPC title