CN2927144Y

CN2927144Y - pH-value automatic controlling system

Info

Publication number: CN2927144Y
Application number: CN 200620118326
Authority: CN
Inventors: 杜文蔚
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-06
Filing date: 2006-06-06
Publication date: 2007-07-25
Anticipated expiration: 2016-06-06

Abstract

The utility model relates to an automatic PH control system, comprising an on-line detection assembly, a control assembly, an implementing assembly, wherein, the on-line detection assembly comprises a PH pole; the control assembly comprises a PH meter, a counter, a timer and a counter display, a timer display; the implementing assembly comprises a pump I, a pump II, a pump III; the PH meter can detect the PH of the passivating liquid, and feed back the detected signals to the PH meter to determinate whether to emit the signals of starting the metering pumps, meanwhile controlling the running time of the metering pumps by adjusting the counter and timer, achieve the aid of automatic control. The utility model has the advantages of being capable of automatically detecting the passivating liquid PH on line, adding reagent automatically, controlling the PH accurately under the requirement of technology, operating easily, avoiding workers touching the passivating liquid directly, and decreasing the possibility of chromium poisoning caused by workers misoperation, and improving the working environment greatly.

Description

A kind of pH value automatic control system

Technical field

The utility model relates to a kind of automaton, relates in particular to a kind of pH value automatic control system that is used for the trivalent chromium passivation.

Background technology

As a rule, after device is zinc-plated, need to do layer protecting film on the surface of zinc coat, to increase wearing quality and aesthetic appearance, this technology is passivation.Traditional handicraft is to adopt sexavalent chrome (Ge) passivation, but sexavalent chrome is poisonous, is banned use of by developed country, and only allows to use trivalent chromium passivation process.Just brought into use this technology in our country at present, because this technology is very high to the requirement of passivating solution pH value (potential of hydrogen), the pH value of passivating solution can raise along with the continuation of processing in process of production simultaneously, thereby influences the quality of passivation.The tradition solution to this problem is manually to detect the pH value of passivating solution with PH examination pen, treats manually to add after pH value raises liquid medicine again and keeps the pH value of passivating solution and reach standard-required.This method not only detects inaccurate, and the passivation quality also is restricted, and does not more meet requirement of mass production.

The utility model content

The purpose of this utility model provides a kind of pH value that can detect passivating solution automatically, and adds chemical substance to guarantee that passivating solution can satisfy the pH value automatic control system that passivation requires according to the variation of pH value in passivating solution.

The purpose of this utility model is to be achieved through the following technical solutions:

A kind of pH value automatic control system, form by online testing agency, control gear, topworks, wherein, online testing agency comprises the PH electrode, control gear comprises PH meter, counter, the timer that is electrically connected with the PH electrode, topworks comprises volume pump and the control corresponding switch that is electrically connected with control gear, and the volume pump export pipeline is connected to deactivation slot; Described PH electrode immerses in the deactivation slot to detect the pH value of passivating solution, the pH value signal feedback that is detected is counted to PH, in the PH meter, set the range of control of passivating solution pH value, when the PH detected value exceeds the PH setting value, thereby the PH meter will provide the volume pump of a logical signal startup PH correctives adds the PH correctives, in the time of in pH value is adjusted to the PH range of set value, volume pump quits work; The number of starts of the volume pump of PH correctives is counted it by counter, when number of times reaches setting value, will start the volume pump of passivating solution, to replenish the loss of passivating solution, controlled by timer the working time of passivating solution volume pump, will stop the passivating solution volume pump when timing reaches.Like this, the pH value of passivating solution just can guarantee all the time in the scope of technological requirement.

The utility model beneficial effect is: pH value that can the online automatic detection passivating solution, automatically add liquid medicine, pH value is controlled in the technological requirement scope accurately, not only easy to operate, and avoided the workman directly to contact passivating solution, thereby reduced the possibility of workman, improved workman's working environment greatly because of the maloperation chromium poisoning.

Description of drawings

Fig. 1 is the structural representation of the described pH value automatic control system of the utility model embodiment;

Fig. 2 is the control principle figure of the described pH value automatic control system of the utility model embodiment;

Fig. 3 is the circuit theory diagrams of the described pH value automatic control system of the utility model embodiment.

Among the figure:

1, pump I; 2, pump II; 3, pump III; 4, green start button and power light; 5, pump I gauge tap; 6, red shutdown button and power light; 7, pump I relay indicating light; 8, counter display screen; 9, PH meter; 10, alarm lamp; 11, timer display screen; 12, pump II relay indicating light; 13, pump III relay indicating light; 14, pump III gauge tap; 15, pump II gauge tap; 16, PH electrode; 17, deactivation slot; 18, passivation liquid medicine jar II; 19, passivation liquid medicine jar I; 20, PH correctives jar; 21, timer; 22, counter

Embodiment

With embodiment the utility model is described in further detail with reference to the accompanying drawings below.

As shown in Figure 1, the described pH value automatic control system of the utility model embodiment, by online detection PH electrode (GP100W) 16 and control gear, topworks forms, wherein, PH electrode 16 immerses in the deactivation slot 17, control gear comprises the PC30 Series P H meter 9 that is electrically connected with PH electrode 16, counter 22, timer 21 and counter display screen 8 and timer display screen 11, topworks comprises the pump I1 that is electrically connected with control structure, pump II2, pump III3 (P066-368TI volume pump series), pump I relay indicating light 7, pump II relay indicating light 12, pump III relay indicating light 13, pump I gauge tap 5, pump II gauge tap 15, pump III gauge tap 14.PH value by 16 pairs of passivating solutions of PH electrode detects, detected signal feedback is to PH meter 9, and count the range of control of having set the pH value of passivating solution in 9 at PH, when the PH detected value exceeds the PH setting value, it is that pump I1 pumps into the PH correctives in the PH correctives jar 20 in the deactivation slot that thereby PH meter 9 will provide the volume pump of a logical signal startup PH correctives, in the time of in pH value is adjusted to the PH range of set value, pump I1 quits work.The number of starts of pump I1 is counted it by counter 22 and is shown at counter display screen 8, when number of times reaches setting value, the volume pump that will start passivating solution is pump II2 and pump III3, the passivation liquid medicine of passivation liquid medicine jar I19, passivation liquid medicine jar II18 is pumped in the deactivation slot 17 to replenish the loss of passivating solution, the working time of pump II2 and pump III3 is by timer 21 control, will stop pump II2 and pump III3 during timing on reaching timer display screen 11; When dangerous situation occurring, alarm lamp 10 is started working.

During use, press green shift knob and power light 4 can be opened this control system, system's energising is set the pH value range of control as follows in PH meter 9.When measurement pattern, can enter the parameter setting pattern by the SETUP+MODE key simultaneously, and press the SETUP key at any time can the return measurement pattern.Set the pH value upper limit (REL1), set point range be-2.00--16.00PH, setting pH value lower limit (REL2), and set point range is-2.00--16.00PH.

The setting value of counter 22 is decided to be 3, and timer 21 is set at 60 seconds, and volume pump is set at 100 ml/min.The gauge tap of all pumps is got to automatic transmission, when the PH detected value exceeds the PH setting value, will start pump I1, add PH correctives 20 in deactivation slot 17, adjust pH value to the PH range of set value, stop volume pump I1, when pump I1 starts 3 times, pump II2 and pump III3 will move 60 seconds; Get to when manual when the switch of pump, pump will move, and when getting to the centre position, pump will be out of service; During shutdown, only need press red shutdown button and power light 6 and just can.

As shown in Figure 2, out1 is the height point output of PH meter 9, and out2 is the low spot output of PH meter 9; J1, J2, J3 are auxiliary reclay; KT1, KT2, KT3 are contactor; TIM is a timer 21; CNT is a counter 22; P1-A is the automatic transmission of pump I1 gauge tap 5; P1-M is the manual of pump I1 gauge tap 5; P2-A is the automatic transmission of pump II2 gauge tap 15; P2-M is the manual of pump II2 gauge tap 15; P3-A is the automatic transmission of pump III3 gauge tap 14; P3-M is the manual of pump III3 gauge tap 14; Arabic numeral are terminals number of device.In the production run, when pH value surpasses the setting value of the upper limit, out1 output, relay J 1 adhesive, J1 normally opened contact closure, contactor KT1 adhesive, pump I1 starts, counter 22 countings, when pH value is lower than the setting value of lower limit, the out1 no-output, relay J 1 is unclamped, the J1 normally opened contact disconnects, and contactor KT1 unclamps, and pump I1 stops; When counter 22 reaches setting value, output signal, contactor KT2, KT3 adhesive, pump II2, pump III3 start, and start timer 21 simultaneously, when timer 21 reaches setting value, output signal break KT2, KT3, pump II2, pump III3 stop, and timer 21 resets.

As shown in Figure 3, N, R (N2, R2) are the 220V power supply; DK0 is an air switch; KT0 is total contactor; D2 is start button and power light 4, and D1 is shutdown button and power light 6; PM1 is pump I1, and PM2 is pump II2, and PM3 is pump III3.

Claims

1, a kind of pH value automatic control system is made up of online testing agency, control gear, topworks, it is characterized in that: online testing agency comprises the PH electrode; Control gear mainly comprises PH meter, counter and the timer that is electrically connected with the PH electrode; Topworks mainly comprises volume pump and the control corresponding switch that is electrically connected with control gear, and the volume pump export pipeline is connected to deactivation slot; Described PH electrode immerses in the deactivation slot to detect the pH value of passivating solution, the pH value signal feedback that is detected is counted to PH, set the range of control of passivating solution pH value in the PH meter, when the PH detected value exceeds the PH setting value, thereby the PH meter will provide the volume pump of a logical signal startup PH correctives adds the PH correctives, in the time of in pH value is adjusted to the PH range of set value, volume pump quits work; The number of starts of the volume pump of PH correctives is counted it by counter, when number of times reaches setting value, will start the volume pump of passivating solution, to replenish the loss of passivating solution; Controlled by timer the working time of passivating solution volume pump, will stop the passivating solution volume pump when timing reaches.