CN110244781A - A kind of chemical plating automatic liquid supply method and its system - Google Patents
A kind of chemical plating automatic liquid supply method and its system Download PDFInfo
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- CN110244781A CN110244781A CN201910529349.7A CN201910529349A CN110244781A CN 110244781 A CN110244781 A CN 110244781A CN 201910529349 A CN201910529349 A CN 201910529349A CN 110244781 A CN110244781 A CN 110244781A
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- liquid supply
- metering pump
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
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Abstract
The present application relates to technical field of surface, disclose a kind of chemical plating automatic liquid supply method, and, the following steps are included: 1) detecting the pH value of plating solution by pH meter, the pH value signal that pH meter will test automatically is transferred to control electronic box for it；2) control electronic box sends corresponding control signal to metering pump, to control the opening and closing of metering pump according to the pH value signal；3) when measuring pump startup, two-way metering pump extracts medical liquid B for adjusting the medical fluid A of plating solution pH and for adjusting plating solution composition, and medical fluid A and medical liquid B after preheating, enter coating bath from auxiliary tank respectively.Above-mentioned chemical plating automatic liquid supply method can be realized plating, detection, the progress of fluid infusion automatic synchronization, and detect sensitive, accurate.The present patent application also discloses a kind of chemical plating automatic liquid supply system, and the automatic synchronization that can be realized plating, sensitive accurate detection and fluid infusion carries out.
Description
Technical field
The present invention relates to technical field of surface, and in particular to a kind of chemical plating automatic liquid supply method and is used for chemical plating
The chemical plating automatic liquid supply system of automatic liquid supply method.
Background technique
Chemical plating is also referred to as electroless plating, is in the case where no impressed current by suitable reducing agent, will be golden in plating solution
Belong to ion reduction into metal, and deposits to a kind of coating method of a variety of materials or piece surface.Compared with plating, chemical plating tool
Have that coating is uniform, pin hole is small, be not required to DC power supply device, can deposit on non-conductor and coated parts are not limited by size shape
The features such as.
The deposition velocity of chemical plating bath is mainly by the concentration of metal ion, reducing agent in operation temperature when plating, plating solution
The influence of concentration and plating solution pH value.In order to guarantee the deposition velocity of plating solution, while the service life of plating solution can be extended again, just needed
Will rationally, effectively adjust plating solution composition, with guarantee the plating solution compositions such as the metal ion consumed, reducing agent are replenished in time.Mesh
There are three types of methods for preceding plating solution composition adjustment: first is that obtaining experiment consumption come adjusting component according to formula and operating condition；Second is that
Consumption is calculated according to the analysis result of plating solution come adjusting component；Third is that with theoretical formula method consumption, and use empirical coefficient
Correction carrys out adjusting component.To realize the automation of chemical plating, in addition to estimating disappearing for plating solution using any of the above method
Outside consumption, it is also necessary to design it is a set of there is targetedly detection device and liquid supply device, enable plating, detection, fluid infusion from
It is dynamic to carry out.By taking chemical nickel plating as an example, as long as being reacted according to chemical nickel plating it is found that constantly detecting the dense of nickel ion in plating solution
It spends, the concentration of orthophosphite ions is assured that the consumption and acid of nickel ion in nickel process, hypophosphite ion
The height of basicity.
Automation equipment is usually that the result detected is transformed into electric signal in the automatic liquid supply system of the prior art, just
The ingredient and pH value of liquid supply device adjust automatically plating solution can be commanded, realizes that chemical nickel plating automates with this, such as photoelectric colorimetry
Method is then to find out the content of detected solution through the penetrating light intensity after colored solutions using photocell or photoelectric tube measurement.Such as
In Figure of description shown in Fig. 1, the automatic liquid supply system of photoelectric colorimetry mainly includes coating bath, sampling apparatus, detection device, master
Control cabinet and liquid supply device.Sampling apparatus acquires the tested solution of plating solution out of coating bath, i.e., tested solution is successively through supercooling, mistake
It is taken by pumping to sampling apparatus after filter, if nickel ion concentration is high in plating solution, plating solution color is dark green；If concentration is low, plating
Liquid color shoals therewith.According to law of Beer, i.e., colored solutions are to the concentration of monochromatic degree of absorption and colored solutions at just
Than invariable incident light by colour filter, concavees lens, is then passed through the test solution in cuvette, be radiated at by detection device
On photocell, photocell exports electric signal according to the intensity for receiving light.Main control box distinguish by detection device conveying Lai letter
Number, and exported to liquid supply device and execute signal.Liquid supply device concentrated medicament, adjust pH acid solution or lye and moisture at A,
B, tri- tunnel fluid infusion of C supplements, and three tunnel fluid infusion are directly inputted coating bath, and the quantitative relationship of supplement can be estimated by theoretical formula and experimental data
It calculates, the magnitude of recruitment of concentrated medicament, acid solution or lye and water can be adjusted respectively using quantitative column.It can be seen that photoelectric colorimetry
Method will be sampled first, then be detected to the tested solution of acquisition, then could fluid infusion by estimation.
Although above-mentioned photoelectric colorimetry can be realized automatic liquid supply, there is also the following technical problems: 1) with
Chemical nickel plating plating time increases, and impurity gradually increases in plating solution, and the impurity of natural tested solution can also increase, and impurity will affect
Luminosity, color, and then interfere with normal detection of the photoelectric colorimetry to tested solution, so sensitivity is lower, fluid infusion it is accurate
Property reduce；2) bath temperature is up to 80~100 DEG C usually in coating bath, if fluid infusion is directly inputted coating bath, will cause in coating bath
Local temperature difference is excessive, while causing plating solution local pH excessively high, is easy to produce nickel hydroxide precipitate, increases the unstability of plating solution；
3) in sampling process, the suction of drawing liquid pump is so that plating solution generates a large amount of foams, so can have from the tested solution that plating solution is extracted out
A large amount of foams, and sampling apparatus and detection device can not strictly remove these foams, this just needs continually to adjust detection dress
The sensitivity set, will affect testing result in this way, to reduce the accuracy of fluid infusion；4) each magnitude of recruitment of every kind of replenisher needs
Empirical equation is needed to frequently replace by estimation.In nickel process, in the reduction center, plating solution on cell wall
Catalyst particle can all cause nickel to restore, and plating solution local temperature difference is excessive is easy to that nickel ion is caused to precipitate, so nickel ion
Consumption range can not accurately estimate that in addition the variation of the nickel ion concentration of plating solution and other complex ion concentration can all influence secondary
The utilization rate of phosphate anion, so the consumption range of hypophosphite ion also can not be estimated accurately.In summary, for change
The prior art for learning plating automatic liquid supply can not accurately estimate the consumptions of various reactants in plating solution, also can not by plating,
Detection, fluid infusion automatic synchronization carry out, it is even more impossible to accurately detect, accurate fluid infusion.
Summary of the invention
A shortcomings that technical problem to be solved by this invention is, overcomes the above prior art: a kind of chemical plating is provided
Automatic liquid supply method, the automatic synchronization that can be realized plating, sensitive accurate detection and fluid infusion carry out.
Technical solution of the invention is as follows: a kind of chemical plating automatic liquid supply method, 1) it is the following steps are included: pass through
PH meter detects the pH value of plating solution, and the pH value signal that pH meter will test automatically is transferred to control electronic box；2) control electronic box is according to this
PH value signal sends corresponding control signal to metering pump, to control the opening and closing of metering pump；3) when measuring pump startup, two-way meter
Amount pumping is taken in the medical fluid A and medical liquid B for adjusting plating solution composition that adjust plating solution pH, and medical fluid A and medical liquid B are passed through pre- respectively
After heat, enter coating bath from auxiliary tank.
The principle of the invention is as follows:
The pH value signal that pH meter will test plating solution is converted to electric signal and is transported to control electronic box, and control electronic box mainly wraps
Containing PLC controller, it is preset with the pH initial value for being used to indicate metering pump start-up operation in PLC and is used to indicate metering pump stopping work
The pH stop value of work.PLC controller is to the electric signal received by comparing pH, being converted to corresponding control signal and being transported to
Metering pump, commander's metering pump work.When measuring pump startup, the first metering pump is extracted out of medical fluid A storage container for adjusting
The medical fluid A of plating solution pH is saved, medical fluid A enters coating bath from auxiliary tank, the pH of such plating solution is just adjusted in time after preheating；
The second metering pump extracts the medical liquid B for adjusting plating solution composition out of medical liquid B storage container simultaneously, and medical liquid B also passes through preheating
Afterwards, enter coating bath from auxiliary tank, the medical liquid B the supplemented so just circulation cycle between coating bath and auxiliary tank.When detecting
PH value be equal to pH stop value, the first metering pump and the second metering pump simultaneously close off.Although the first metering pump and the second metering pump
Start, simultaneously close off simultaneously, medical fluid A and medical liquid B also supplement circulation simultaneously, but the magnitude of recruitment as needed for medical fluid A and medical liquid B
Difference, so the flow or flow velocity of the first metering pump and the second metering pump needs are adjusted according to medical fluid A and the magnitude of recruitment of medical liquid B
Section.
Chemical plating automatic liquid supply method of the present invention compared with prior art, have following remarkable advantage and the utility model has the advantages that
PH meter and control electronic box are fitted close the detection for completing plating solution in step 1), and then step 2), step 3) control
Electronic box and metering pump processed are fitted close the supplement for completing medical fluid.The method of above-mentioned pH meter detection plating solution is properly termed as pH detection
Method can not only be accurately detected the pH value of plating solution to chemical plating using pH detection method of the invention, and in detection process
In also simplify fluid infusion mode, it is only necessary to control electronic box compare pH, it will be able to control metering pump be starting or close, can see
Out, the detection and fluid infusion of the above process can be simple and quick and be synchronously completed.Since pH detection method is detected not against color
Luminous intensity, but the pH value of plating solution is detected, so the high sensitivity of detection, accuracy are high.
More importantly the medical fluid of supplement will first pass through preheating before entering coating bath, auxiliary tank and coating bath are fitted close,
Which solves many problem of the prior art, can reach bath stability, accurately detect pH, accurate estimation reactant consumption amount
Effect.Specifically, being primarily due to before medical fluid inputs coating bath, first it to be transported to the medical fluid of coating bath in this way by preheating
The temperature just relatively temperature of plating solution, can either avoid local temperature difference in coating bath excessive, will not cause local pH in plating solution
It is excessively high, reduce the unstable factor of plating solution.Second, the preheated foam that can be removed in plating solution reduces foam and does to detection
It disturbs, so the real-time detection effect of pH meter is good, accuracy is high, high sensitivity, the pH value for measuring medical fluid is more accurate.To sum up, originally
Invention chemical plating automatic liquid supply method can be realized plating, detection, the progress of fluid infusion automatic synchronization, and detect sensitive, accurate.
Preferably, it controls and is preset with the pH initial value for being used to indicate metering pump start-up operation in electronic box and is used to indicate metering
Pump the pH stop value to stop working.
It is further preferred that measuring pump startup when the pH value detected is less than or greater than pH initial value；When detecting plating solution
PH value be equal to pH stop value, metering pump stops working.Due to pH meter can real-time detection to plating solution pH value, and control electronic box
It is inside previously provided with above-mentioned pH initial value and pH stop value, so pH value and pre-set pH that control electronic box will test rise
Initial value and pH stop value compare, so that it may commander's metering pump work.
Preferably, when the pH value for detecting plating solution is less than the initial pH value of plating solution, medical fluid A is lye.That is, working as
H in plating solution+When excessive concentration, supplement alkaline solution is also needed to be used to neutralize H in plating solution other than the reactant of supplement consumption+。
It is further preferred that measuring pump startup when medical fluid A is lye and the pH value that detects is less than pH initial value；Work as inspection
The pH value measured is equal to pH stop value, and metering pump stops working.
Preferably, when the pH value for detecting plating solution is greater than the initial pH value of plating solution, medical fluid A is acid solution.That is, working as
OH in plating solution-When excessive concentration, supplement acid solution is also needed to be used to neutralize OH in plating solution other than the reactant of supplement consumption-。
It is further preferred that measuring pump startup when medical fluid A is acid solution and the pH value that detects is greater than pH initial value；Work as inspection
The pH value measured is equal to pH stop value, and metering pump stops working.
Preferably, two-way metering pump is extracted for adjusting the medical fluid A of plating solution pH and for adjusting simultaneously in the step 3)
The medical liquid B of plating solution composition.
Preferably, the mode of the preheating is that heat-transfer pipe or heat exchanger directly contact medicine liquid heating.Using directly contact
The mode of medical fluid, medical fluid completes preheating while through the transmission process of heat-transfer pipe or heat-exchange tube, into auxiliary tank
Fluid replacement temperature all reaches preheating temperature, is not in that local temperature difference is excessive in plating solution, and it is excessively high local pH occur, detects
The more accurate stabilization of pH.
It is also preferable that the mode of the preheating is that heating agent is passed through heating container mediate contact medicine liquid heating.Between
The mode for connecing heating medical fluid, since heating container capacity is big, consuming little energy, so heating medical fluid is more rapidly and efficiently.
Preferably, the preheating temperature is less than or equal to bath temperature in coating bath, more than or equal to the 1/2 of bath temperature.Such as
Bath temperature is 80 DEG C in coating bath, then preheating temperature is within the scope of 40~80 DEG C, and including endpoint value.Preheating in above range
Temperature is closer to the temperature of plating solution, and when the medical fluid of supplement enters coating bath, the temperature difference of medical fluid and plating solution is smaller, pH is closer, more preferably
The unstable factor of ground reduction plating solution.
Preferably, medical fluid A is the lye or acid solution of 0.1~4mol/L, and lye is sodium hydroxide solution, ammonium hydroxide or hydroxide
Potassium solution, acid solution are sulfuric acid solution, hydrochloric acid solution or acetic acid solution.The ingredient of medical liquid B is according to different original plating solutions and
Difference, ingredient type is identical as the ingredient type of original plating solution, mainly includes metal ion and reducing agent, such as chemical nickel plating
When medical liquid B mainly include following concentration component: 10~50g/L nickel sulfate hexahydrate, 15~65g/L sodium hypophosphite.
Preferably, above-mentioned chemical plating automatic liquid supply method use following chemical plating automatic liquid supply system, it include coating bath and
Liquid supply device, liquid supply device include liquid storage container and metering pump, and the output port of liquid storage container and the input port of metering pump connect
It connects, auxiliary tank is equipped between coating bath and liquid supply device, the preheating device for heating fluid infusion is equipped with before the input port of auxiliary tank；
The input port of auxiliary tank and the output port of metering pump connect, and the output port of auxiliary tank and the input port of coating bath connect；
The pH meter being electrically connected with a control electronic box is equipped in auxiliary tank or coating bath, the signal output end of pH meter is electrically connected with control electronic box,
Control electronic box is electrically connected with metering pump.
The shortcomings that another technical problem that the present invention solves is, overcomes the above prior art: provide a kind of chemical plating from
Dynamic fluid infusion system, the automatic synchronization that can be realized plating, sensitive accurate detection and fluid infusion carry out.
The technical solution of above-mentioned technical problem is as follows: a kind of chemical plating automatic liquid supply system, including coating bath and fluid infusion
Device, liquid supply device include liquid storage container and metering pump, and the output port of liquid storage container and the input port of metering pump connect, plating
It is equipped with auxiliary tank between slot and liquid supply device, the preheating device for heating fluid infusion, auxiliary are equipped with before the input port of auxiliary tank
The output port of slot and the input port of coating bath connect；The input port of preheating device and the output port of metering pump connect, in advance
The output port of thermal and the input port of auxiliary tank connect；It is equipped in auxiliary tank or coating bath and controls what electronic box was electrically connected with one
The signal output end of pH meter, pH meter is electrically connected with control electronic box, and control electronic box is electrically connected with metering pump.
Above-mentioned chemical plating automatic liquid supply system compared with prior art, have following remarkable advantage and the utility model has the advantages that
Above-mentioned chemical plating automatic liquid supply system is equipped with pH meter in auxiliary tank or coating bath, and auxiliary tank or coating bath are externally provided with control
Electronic box, controlling mainly includes PLC controller in electronic box, and pH meter and control electronic box are fitted close, the plating solution that pH meter will test
Real-time pH value is reflected by electric signal, and PLC controller by comparing pH value, is converted to corresponding the electric signal received
Control signal is simultaneously transported to metering pump, commander's metering pump work.Due to being equipped with before the input port of auxiliary tank for heating fluid infusion
Preheating device, fluid infusion input auxiliary tank before, first fluid infusion is heated, the fluid replacement temperature for being transported to coating bath so just compares
It is closer to the temperature of plating solution, has both avoided local temperature difference in coating bath excessive, local pH in plating solution will not be caused excessively high, reduces plating solution
Unstable factor.And preheated process can remove the foam in plating solution, so the real-time detection effect of pH meter is good, accurate
Degree height, high sensitivity.As soon as control electronic box can in short, the detection of above-mentioned chemical plating automatic liquid supply system only needs a pH data
Accurately instruction liquid supply device to medical fluid supplement and to pH adjust so that plating, it is sensitive it is accurate detection and fluid infusion automatic synchronization into
Row adjusts the ingredient and pH value of coating bath plating solution in time.
Preferably, preheating device is the heat-transfer pipe or heat-exchange tube for directly contacting fluid infusion.Using above-mentioned preheating device, fluid infusion
Preheating is completed while through the transmission process of heat-transfer pipe or heat-exchange tube, all reaches pre- into the fluid replacement temperature in auxiliary tank
Hot temperature is not in that local temperature difference is excessive, will not occur that local pH is excessively high, the more accurate stabilization of the pH detected.
It is also preferable that preheating device is the heating tank being connected between metering pump and auxiliary tank.Due to heating tankage
Greatly, consuming little energy, so heating fluid infusion is more rapidly and efficiently.
Preferably, it is equipped with circulating pump and filter between auxiliary tank and coating bath, the output port of auxiliary tank and circulating pump
The input port of input port connection, the output port of circulating pump and filter connects, the output port of filter and coating bath
Input port connection；Overflow downcomer is equipped in coating bath, the input port of overflow downcomer and the output port of filter connect, overflow downcomer
The connection of the input port of output port and coating bath.Filter is added, the impurity that can be filtered out during plating in entire plating solution is dirty
Object reduces impurity in coating bath and interferes plating solution.Using the above structure, fluid infusion will first pass through overflow before being transported to coating bath in auxiliary tank
Bucket, i.e., the fluid infusion of auxiliary tank is pumped into filter by circulating pump, and after liquid level in overflow downcomer is full, fluid infusion will overflow to flow into plating
Slot, just circulation is got up between coating bath and auxiliary tank for such fluid infusion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the automatic liquid supply system of prior art photoelectric colorimetry.
Fig. 2 is the structural schematic diagram of chemical plating automatic liquid supply system of the present invention.
Fig. 3 is a kind of line map of chemical plating automatic liquid supply system of the present invention.
Fig. 4 is another line map of chemical plating automatic liquid supply system of the present invention.
101, coating bath shown in Fig. 1,102, sampling apparatus, 103, detection device, 104, main control box, 105, fluid infusion dress
It sets,
1 shown in Fig. 2, medical fluid A tank, the 2, first drawing liquid pump, 3, medical fluid A holding vessel, the 4, first metering pump, 5, medical liquid B tank,
6, the second drawing liquid pump, 7, medical liquid B holding vessel, the 8, second metering pump, 9, preheating device, 10, auxiliary tank, 11, circulating pump, 12, mistake
Filter, 13, coating bath, 14, overflow downcomer.
Specific embodiment
The present invention is described in further details with specific embodiment below, but the present invention is not only limited in detail below in fact
Apply example.
Plurality of raw materials involved in the present invention, including sodium hydroxide solution, ammonium hydroxide, potassium hydroxide solution, sulfuric acid solution, hydrochloric acid
Solution and acetic acid solution, these solution can by market purchasing come sodium hydroxide, ammonium hydroxide, potassium hydroxide, sulfuric acid, hydrochloric acid, second
Acid group is needed according to concentration, simply prepares obtain with water respectively.
A variety of instruments involved in the present invention, including pH meter, control electronic box, drawing liquid pump, metering pump, circulating pump, filter, overflow
Stream bucket, these instruments can be got by market purchasing, as the online pH of commercially available high temperature-resistant acid-resistant alkali formula industry can be used in pH meter
The commercially available electronic box with PLC controller can be used in meter, control electronic box.
Embodiment provided below is not intended to limit the invention covered range, and described step is also not use
Sequence is executed to limit its.Those skilled in the art combine existing common knowledge to do conspicuous improvement to the present invention, also fall
Enter the present invention claims protection scope within.
Embodiment of the method
A kind of chemical plating automatic liquid supply method, 1) it by pH meter the following steps are included: detect the pH value of plating solution, pH meter is certainly
The dynamic pH value signal that will test is transferred to control electronic box；2) control electronic box sends corresponding control signal according to the pH value signal
To metering pump, to control the opening and closing of metering pump；3) when measuring pump startup, the first metering pump extracts the medicine for adjusting plating solution pH
Liquid A, medical fluid A enter coating bath from auxiliary tank after preheating；4) the second metering pump extracts the medicine for adjusting plating solution composition simultaneously
Liquid B, medical liquid B enter coating bath from auxiliary tank after preheating.
PH meter, which can be placed in auxiliary tank or coating bath, directly contacts plating solution, but due to coating bath plating solution entire during fluid infusion
PH value could be stablized after needing equal plating solutions sufficiently to recycle, so plating solution need to keep uniform and stable when detection pH value, usually assist
The small volume of slot, pH meter are more convenient for contacting plating solution in auxiliary tank and are detected.If the space of coating bath is very big, equal plating solutions are needed
After stable circulation, then pH meter detection is put on the internal groove side wall of coating bath, it can now close to the local bath pH value of coating bath internal groove side wall
To represent the pH value of entire coating bath plating solution.Detection pH value can also acquire out a small amount of be tested from uniform and stable plating solution
Liquid is more conducive to accurate detection, accurate fluid infusion in this way.In short, pH meter can detect the pH value of plating solution in real time.
It is preset with the pH initial value for being used to indicate metering pump start-up operation in control electronic box and is used to indicate metering pump stopping
The pH stop value of work.When the pH value for detecting plating solution is lower than the initial pH value of plating solution, medical fluid A is lye, the pH detected
Value is less than pH initial value, measures pump startup, and the pH value detected is equal to pH stop value, and metering pump is closed.When detecting plating solution
When pH value is higher than plating solution initial pH value, medical fluid A is acid solution, and the pH value detected is greater than pH initial value, measures pump startup, detection
The pH value arrived is equal to pH stop value, and metering pump is closed.
Although the first metering pump and the second metering pump start, simultaneously close off simultaneously, also supplement is followed simultaneously for medical fluid A and medical liquid B
Ring, but since medical fluid A and magnitude of recruitment needed for medical liquid B are different, thus the flow of the first metering pump and the second metering pump or
Flow velocity needs are adjusted according to medical fluid A and the magnitude of recruitment of medical liquid B.Such as the magnitude of recruitment of medical fluid A and the ratio between the magnitude of recruitment of medical liquid B it is logical
Often in the range of 0.1~6, thus the ratio between flow or flow velocity of the first metering pump and the second metering pump also 0.1~6 model
In enclosing.
Medical fluid A be 0.1~4mol/L lye or acid solution, lye be sodium hydroxide solution, ammonium hydroxide or potassium hydroxide solution,
Acid solution is sulfuric acid solution, hydrochloric acid solution or acetic acid solution.The ingredient of medical liquid B is different according to different original plating solutions,
Ingredient type is identical as the ingredient type of original plating solution, mainly includes metal ion and reducing agent, such as medical liquid B when chemical nickel plating
It mainly include the component of following concentration: 10~50g/L nickel sulfate hexahydrate, 15~65g/L sodium hypophosphite.
The mode of the preheating is heat-transfer pipe or heat exchanger directly contacts medicine liquid heating, or heating agent is held by heating
Device mediate contact medicine liquid heating.
The preheating temperature is less than or equal to bath temperature in coating bath, more than or equal to the 1/2 of bath temperature.Such as plating in coating bath
Liquid temperature is 80 DEG C, then the arbitrary value within the scope of 40~80 DEG C, such as 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 may be selected in preheating temperature
℃。
Example 1
Plating solution initial pH=5.50, concentration of nickel sulfate 16g/L, sodium hypophosphite concentration 40g/L, plating solution initially plate speed 10 μm/
h；Medical fluid A is 2mol/L sodium hydroxide solution, and medical liquid B includes 16g/L nickel sulfate and 40g/L sodium hypophosphite.First metering pump
Flow set is at 3 times of flow of the second metering pump.PH initial value is set in control electronic box panel measuring parameter interface
4.20, pH stop values are set as 6.50.
PH meter detects auxiliary tank plating solution pH=4.10 during plating.Metering pump starts to start work, the first metering pump
Medical fluid A is extracted, i.e. sodium hydroxide solution enters coating bath from auxiliary tank after preheating；The second metering pump extracts medical liquid B simultaneously,
Medical liquid B enters coating bath from auxiliary tank after preheating.After recycling a period of time, pH meter detects auxiliary tank plating solution pH=6.50,
Metering pump stops working, and medical liquid B has mended 25L at this time, and medical fluid A sodium hydroxide solution has mended 75L.Plating solution plating speed reverts to 10 again
μm/h。
Example 2
Plating solution initial pH=8.50, concentration of nickel sulfate 30g/L, sodium hypophosphite concentration 35g/L, plating solution initially plate speed 20 μm/
h；Medical fluid A is 2mol/L sulfuric acid solution, and medical liquid B includes 30g/L nickel sulfate and 35g/L sodium hypophosphite.The flow of first metering pump
It is arranged to 4 times of the flow of the second metering pump.PH initial value is set in control electronic box panel measuring parameter interface
10.50, pH stop values are set as 7.50.
PH meter detects auxiliary tank plating solution pH=10.65 during plating.Metering pump starts to start work, the first metering pump
Medical fluid A is extracted, i.e. sulfuric acid solution enters coating bath from auxiliary tank after preheating；The second metering pump is extracted for adjusting plating simultaneously
The medical liquid B of liquid ingredient, medical liquid B enter coating bath from auxiliary tank after preheating.After recycling a period of time, pH meter detects auxiliary
Slot plating solution pH=7.50, metering pump stop working, and medical liquid B has mended 20L at this time, and medical fluid A sulfuric acid solution has mended 80L.Plating solution plating speed
Again 20 μm/h is reverted to.
System embodiment
As shown in figs. 2 to 4, a kind of chemical plating automatic liquid supply system, including coating bath 13 and liquid supply device, coating bath are also referred to as led
Slot.Liquid supply device includes liquid storage container and metering pump, and the output port of liquid storage container and the input port of metering pump connect.
It is equipped with auxiliary tank 10 between coating bath 13 and liquid supply device, is equipped with before the input port of auxiliary tank 10 for heating fluid infusion
Preheating device 9, the output port of auxiliary tank 10 connect with the input port of coating bath 13；The input port and meter of preheating device 9
The output port connection of amount pump, the output port of preheating device 9 are connect with the input port of auxiliary tank 10.Preheating device 9 can be with
It is the heat-transfer pipe or heat-exchange tube of direct contact fluid infusion, preheating device 9 is also possible to be connected between metering pump and auxiliary tank 10
Heating tank.
The internal groove side wall of auxiliary tank 10 or coating bath 13 is equipped with the pH meter resistant to high temperature being electrically connected with a control electronic box, pH meter
Signal output end is electrically connected with control electronic box, and control electronic box is electrically connected with metering pump.When pH meter is located at the internal groove side wall of auxiliary tank 10
When upper, control electronic box be can be set in the position close to auxiliary tank 10；When pH meter is located on the internal groove side wall of coating bath 13, control electricity
Case can be set in the position close to coating bath 13.
Circulating pump 11 and filter 12, the output port and circulating pump of auxiliary tank 10 are equipped between auxiliary tank 10 and coating bath 13
11 input port connection, the output port of circulating pump 11 are connect with the input port of filter 12, the output end of filter 12
Mouth is connect with the input port of coating bath 13.
The internal groove side wall of coating bath 13 is equipped with overflow downcomer 14, and the input port of overflow downcomer 14 and the output port of filter 12 connect
It connects, the output port of overflow downcomer 14 is connect with the input port of coating bath 13.
Liquid storage container includes the medical fluid A tank 1 and medical fluid A holding vessel 3 for storing medical fluid A.Medical fluid A is the alkali of 0.1~4mol/L
Liquid or acid solution, lye are sodium hydroxide solution, ammonium hydroxide or potassium hydroxide solution, and acid solution is sulfuric acid solution, hydrochloric acid solution or acetic acid
Solution.The output port of medical fluid A tank 1 is connect with the input port of the first drawing liquid pump 2, the output port and medicine of the first drawing liquid pump 2
The input port of liquid A holding vessel 3 connects, and the output port of medical fluid A holding vessel 3 is connect with the input port of the first metering pump 4, the
The output port of one metering pump 4 is connect with the input port of preheating device 9, output port and the auxiliary tank 10 of preheating device 9
Input port connection.
Liquid storage container further includes the medical liquid B tank 5 and medical liquid B holding vessel 7 for storing medical liquid B.The ingredient of medical liquid B is according to different
Original plating solution and it is different, ingredient type is identical as the ingredient type of original plating solution, mainly include metal ion and reduction
Agent, for example medical liquid B mainly includes the component of following concentration when chemical nickel plating: 10~50g/L nickel sulfate hexahydrate, 15~65g/L times
Sodium phosphate.The output port of medical liquid B tank 5 is connect with the input port of the second drawing liquid pump 6, the output port of the second drawing liquid pump 6 with
The input port of medical liquid B holding vessel 7 connects, and the output port of medical liquid B holding vessel 7 is connect with the input port of the second metering pump 8,
The output port of second metering pump 8 is connect with the input port of preheating device 9, the output port and auxiliary tank 10 of preheating device 9
Input port connection.
Above-mentioned first drawing liquid pump 2 is centrifugal pump or diaphragm pump, and the second drawing liquid pump 6 is centrifugal pump or diaphragm pump.
The landline of medical fluid A is 1 → the first drawing liquid pump 2 → medical fluid A holding vessel of medical fluid A tank, 3 → the first metering pump 4 → pre-
14 → coating bath of thermal 9 → auxiliary tank, 10 → circulating pump, 11 → filter, 12 → overflow downcomer 13.That is, the first drawing liquid pump 2
Medical fluid A in medical fluid A tank 1 is pumped into medical fluid A holding vessel 3, the medical fluid A in medical fluid A holding vessel 3 is pumped into the first metering pump 4, and first
Metering pump 4 extracts medical fluid A according to required magnitude of recruitment, enters in auxiliary tank 10 by preheating device 9, and circulating pump 11 will
The medical fluid A of auxiliary tank 10 is pumped into filter 12, and subsequently into overflow downcomer 14, after liquid level in overflow downcomer 14 is full, medical fluid A will
It overflows to flow into coating bath 13.
The landline of medical liquid B is 5 → the second 6 → medical liquid B of drawing liquid pump holding vessel of medical liquid B tank, 7 → the second metering pump 8 → pre-
14 → coating bath of thermal 9 → auxiliary tank, 10 → circulating pump, 11 → filter, 12 → overflow downcomer 13.That is, the second drawing liquid pump 6
Medical liquid B in medical liquid B tank 5 is pumped into medical liquid B holding vessel 7, the medical liquid B in medical liquid B holding vessel 7 is pumped into the second metering pump 8, and second
Metering pump 8 extracts medical liquid B according to required magnitude of recruitment, enters in auxiliary tank 10 by preheating device 9, and circulating pump 11 will
The medical liquid B of auxiliary tank 10 is pumped into filter 12, and subsequently into overflow downcomer 14, after liquid level in overflow downcomer 14 is full, medical liquid B will
It overflows to flow into coating bath 13.
It is readily appreciated that, metal ion precipitates in medical liquid B in order to prevent, and medical fluid A and medical liquid B should divide two-way to pass through respectively respectively
Enter auxiliary tank after self-corresponding metering pump, preheating device, then passes through 11 → filter of circulating pump, 12 → overflow downcomer 14 together
Coating bath 13 is flowed into afterwards.
The above is only feature implementation examples of the invention, are not limited in any way to the scope of the present invention.It is all to use together
The technical solution formed Deng exchange or equivalence replacement, all falls within rights protection scope of the present invention.
Claims (10)
1. a kind of chemical plating automatic liquid supply method, which is characterized in that 1) it by pH meter the following steps are included: detect the pH of plating solution
Value, the pH value signal that pH meter will test automatically are transferred to control electronic box；2) control electronic box is sent corresponding according to the pH value signal
Control signal to metering pump, to control the opening and closing of metering pump；3) when measuring pump startup, two-way metering pump is extracted for adjusting
The medical fluid A of plating solution pH and medical liquid B for adjusting plating solution composition, medical fluid A and medical liquid B respectively after preheating, from auxiliary tank into
Enter coating bath.
2. chemical plating automatic liquid supply method according to claim 1, which is characterized in that be preset in control electronic box for referring to
Show the pH initial value of metering pump startup and is used to indicate the pH stop value of metering pump closing.
3. chemical plating automatic liquid supply method according to claim 2, which is characterized in that when the pH value detected is less than or greatly
In pH initial value, pump startup is measured；When the pH value for detecting plating solution is equal to pH stop value, metering pump is closed.
4. chemical plating automatic liquid supply method according to claim 1, which is characterized in that two-way metering pump in the step 3)
The medical liquid B for adjusting the medical fluid A of plating solution pH and for adjusting plating solution composition is extracted simultaneously.
5. chemical plating automatic liquid supply method according to claim 1, which is characterized in that the mode of the preheating is heat-transfer pipe
Or heat exchanger directly contacts medicine liquid heating.
6. chemical plating automatic liquid supply method according to claim 1, which is characterized in that the mode of the preheating is by heating agent
By heating container mediate contact medicine liquid heating.
7. chemical plating automatic liquid supply method according to claim 1, which is characterized in that the preheating temperature is less than or equal to plating
Bath temperature in slot, more than or equal to the 1/2 of bath temperature.
8. a kind of chemical plating automatic liquid supply system for the described in any item chemical plating automatic liquid supply methods of claim 1~7,
Including coating bath (13) and liquid supply device, liquid supply device includes liquid storage container and metering pump, the output port of liquid storage container and metering
The input port of pump connects, which is characterized in that auxiliary tank (10) are equipped between coating bath (13) and liquid supply device, auxiliary tank (10)
The preheating device (9) for heating fluid infusion, the output port of auxiliary tank (10) and the input of coating bath (13) are equipped with before input port
Port connection；The output port of the input port of preheating device (9) and metering pump connects, the output port of preheating device (9) with
The input port of auxiliary tank (10) connects；The pH meter being electrically connected with a control electronic box is equipped in auxiliary tank (10) or coating bath (13),
The signal output end of pH meter is electrically connected with control electronic box, and control electronic box is electrically connected with metering pump.
9. the chemical plating automatic liquid supply system according to claim 8 for chemical plating automatic liquid supply method, feature exist
In the preheating device (9) is the heat-transfer pipe or heat-exchange tube for directly contacting fluid infusion.
10. the chemical plating automatic liquid supply system according to claim 8 for chemical plating automatic liquid supply method, feature exist
In, between auxiliary tank (10) and coating bath (13) be equipped with circulating pump (11) and filter (12), the output port of auxiliary tank (10) and
The input port of circulating pump (11) connects, and the output port of circulating pump (11) is connect with the input port of filter (12), filters
The output port of machine (12) is connect with the input port of coating bath (13)；Overflow downcomer (14) are equipped in coating bath (13), overflow downcomer (14)
Input port connect with the output port of filter (12), the input port of the output port of overflow downcomer (14) and coating bath (13)
Connection.
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