CN102513275A - Conductivity control system and application thereof - Google Patents
Conductivity control system and application thereof Download PDFInfo
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- CN102513275A CN102513275A CN2011104022491A CN201110402249A CN102513275A CN 102513275 A CN102513275 A CN 102513275A CN 2011104022491 A CN2011104022491 A CN 2011104022491A CN 201110402249 A CN201110402249 A CN 201110402249A CN 102513275 A CN102513275 A CN 102513275A
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Abstract
The invention proposes a conductivity control system and application of the system, particularly, a conductivity control system which comprises a sampling device, a conductivity detection device, a charging device and a conductivity control device, wherein the sampling device is suitable for extracting samples from a reactor; the conductivity detection device is connected with the sampling device and suitable for detecting the conductivity of the samples extracted by the sampling device so as to determine the conductivity of the sample; the charging device is connected with the reactor so as to add a feed liquid into the reactor; the conductivity control device is respectively connected with the conductivity detection device and the charging device so as to start or stop the charging device which adds the feed liquid in the reactor based on the conductivity of the sample obtained by the conductivity detection device. Also proposed is a method for treatment of metal workpieces by using the conductivity control system before coating. The treatment conditions in the reactor can be monitored effectively by using the conductivity control system.
Description
Technical field
The present invention relates to the coated metal pre-treating technology.
Background technology
In the paint industry metal surface spraying production process, pre-treatment is very important link, and so-called pre-treatment will thoroughly be cleaned fouling products such as the grease of metal surface, dust exactly, and formed epithelium in the metal surface.The technological process of pre-treatment washes, uses the epithelium of nano ceramics inorganic agent (or silane finish) to transform, make up for the second time water-washing process for preparatory degreasing, degreasing, the combination for the first time of using alkaline defatting agent.In the pre-treatment process, the control of concentration is to the pre-treatment quality in each treatment trough, and the final performance of coating plays crucial effect.
Yet present Coating Pretreatment technology still remains to be improved.
Summary of the invention
The present invention is intended to solve at least one of technical problem that exists in the prior art.For this reason, one object of the present invention is to propose a kind of control of process parameters system that can effectively control the metal workpiece painting pre-treatment.
According to a first aspect of the invention, the present invention proposes a kind of electrical conductivity and control system.According to embodiments of the invention, this electrical conductivity control system comprises: sampler, and said sampler links to each other with said reactor, and is suitable for from said reactor, extracting sample; The electrical conductivity checkout gear, said electrical conductivity checkout gear links to each other with said sampler, and the sample that is suitable for that said sampler is extracted carries out electrical conductivity and detect, so that confirm the electrical conductivity of said sample; Feeding device, said feeding device links to each other with said reactor, is used for adding feed liquid to said reactor; The electrical conductivity control device; Said electrical conductivity control device links to each other with said feeding device with said electrical conductivity checkout gear respectively; So that based on the electrical conductivity of the said sample that obtains in the said electrical conductivity checkout gear, start or close said feeding device and in said reactor, add feed liquid.According to embodiments of the invention, can detect in real time the electrical conductivity in the reactor effectively, thereby can monitor the electrical conductivity in the reactor in real time, and can effectively the pH in the reactor be adjusted in the optimized scope according to predetermined parameters.
According to embodiments of the invention, above-mentioned electrical conductivity is controlled system can also have following additional technical feature:
According to one embodiment of present invention, said reactor is a rinsing bowl, and said feeding device adds water in said reactor.Thus, utilize electrical conductivity control system, can carry out in the Coating Pretreatment process at metal works effectively according to the embodiment of the invention; Monitor the electrical conductivity in the rinsing bowl effectively; Thereby can realize best washing effect, can not cause waste simultaneously, save cost water resource.
According to one embodiment of present invention, said electrical conductivity control device further links to each other with said sampler, is used for controlling said sampler and extracts sample from said reactor.Thus, can be taken a sample automatically by electrical conductivity control device control sampler, the automation that realizes sampling, detects and regulate and control is handled.
According to one embodiment of present invention, said sampler extracts sample according to the predetermined cycle from said reactor.Thus, can realize regularly taking a sample the optimization process effect in the realization response device.
According to one embodiment of present invention; Be provided with controlling value in advance in the said electrical conductivity control device; Based on the electrical conductivity of said sample and the difference of said controlling value, determine whether to start said feeding device and in said reactor, add feed liquid, and control the feeding quantity of said feeding device.Thus, can regulate the addition of feed liquid as required, for example amount of water can be monitored the treatment effect in the reactor thus effectively.
According to one embodiment of present invention; Said sampler further links to each other with feeding device, so that the feed liquid in the said sample adding device is taken a sample, and detects the electrical conductivity of feed liquid in the said sample adding device through the electrical conductivity checkout gear; Wherein, Said electrical conductivity control device determines whether to start said feeding device and in said reactor, adds feed liquid, and control the feeding quantity of said feeding device based on the difference of the electrical conductivity of feed liquid in the electrical conductivity of said sample and the said sample adding device.Thus, can monitor the treatment effect in the reactor through the monitoring feed liquid in the electrical conductivity difference that gets into the reactor front and back.
According to a second aspect of the invention, the present invention proposes a kind of method of metal works being carried out Coating Pretreatment.According to embodiments of the invention, this comprises the method that metal works carries out Coating Pretreatment: said metal works is carried out preparatory ungrease treatment and ungrease treatment successively in Degreasing Area Stage 1 and degreasing bath, so that obtain the metal works through ungrease treatment; Said metal works through ungrease treatment is carried out first washing in first rinsing bowl, will through the metal works of first washing in the epithelium conversion tank, utilize the epithelium transforming agent to handle, so that form epithelium on the surface of said metal works; And the metal works that the surface forms epithelium carried out second washing in second rinsing bowl, so that obtain metal works through Coating Pretreatment, wherein,
Said first rinsing bowl and said second rinsing bowl link to each other with foregoing electrical conductivity control system respectively independently, so that in water-washing process, respectively the electrical conductivity of solution in said first rinsing bowl and said second rinsing bowl are controlled.Thus; Can be through in processing procedure, the amount of water in the rinsing bowl being controlled; Thereby can monitor the washing effect in the rinsing bowl effectively, realize the best washing effect, thereby improve the efficient and the effect of metal works being carried out Coating Pretreatment metal works.
According to embodiments of the invention, this can also have following additional technical feature to the method that metal works carries out Coating Pretreatment:
According to one embodiment of present invention, before metal works is carried out preparatory ungrease treatment, said metal works is carried out prerinse handle in the prerinse groove.Thus, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
According to a third aspect of the invention we, the invention allows for a kind of metal works, it is according to the described method preparation of metal works being carried out Coating Pretreatment of second aspect present invention.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is the structural representation of the system of free alkalinity control according to an embodiment of the invention;
Fig. 2 is the structural representation of the system of pH control according to an embodiment of the invention;
Fig. 3 is the structural representation of the system of electrical conductivity control according to an embodiment of the invention;
Fig. 4 is the structural representation that according to an embodiment of the invention metal works is carried out the system of Coating Pretreatment;
Fig. 5 is a coated metal pre-treatment automatic checkout and control system process chart according to an embodiment of the invention;
Fig. 6 is coated metal pre-treatment automatic checkout and control system instrument control principle figure according to an embodiment of the invention;
Fig. 7 is the preparatory degreasing of alkaline defatting agent according to an embodiment of the invention, degreasing tank liquor binary channels Automatic Detection and Control subsystem;
Fig. 8 is the automatic Detection & Controling subsystem of coated metal pre-treatment rinse water according to an embodiment of the invention; And
Fig. 9 is the automatic Detection & Controling subsystem of PH that nano ceramics transforming agent or silane finish are used in coated metal pre-treatment according to an embodiment of the invention.
The specific embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention; Term " vertically ", " laterally ", " on ", the orientation of indications such as D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " or position relation be for based on orientation shown in the drawings or position relation; Only be for the ease of describing the present invention rather than requiring the present invention therefore can not be interpreted as limitation of the present invention with specific azimuth configuration and operation.
Term used herein " first ", " second " and similarly expression way only be in order to distinguish, and can not be interpreted as importance or otherwise difference by any way.
The present invention is based on inventor's following discovery and accomplishes: existing coated metal pre-treatment adopts manual regular to detect the tank liquor technological parameter; Detected once in per 2 hours; Sense cycle is long; The production process check is serious to lag behind, and can not in time reflect the problem that occurs in the production process, has a strong impact on the uniformity of product quality.In addition, existing metal pre-treatment tank liquor concentration detects the back hand-kept, and because of sense cycle is long, testing result can only reflect tank liquor concentration when detecting sampling, is unfavorable for statistical analysis, when the product coating performance changes, does not have trackability.Existing coated metal pre-treatment is all adopted according to the manual detection result, the artificial tank liquor component of adding, and change in concentration is big, can not the tank liquor technological parameter be controlled in the optimum range, and the product quality fluctuation is big, and hand labor intensity is big simultaneously.For this reason, the inventor has proposed through automatic detection device is set, even detect the technological parameter of each tank liquor in the coated metal pre-treatment exactly automatically, guarantees that the concentration of tank liquor in the metal Coating Pretreatment is in slave mode.In addition; The present invention is also through being provided with control device; For example comprise PLC (FPGA control), receive technological parameter data, the technological parameter data are carried out technology from automatic detection device; Contrast with the parameter of standard, and then can be through control device PLC and feeding device (also the can be described as metering device) component of accurately adding each tank liquor for example.In addition, the present invention can transfer to monitoring system with the technological parameter data through PLC and carry out automatic record, data, and figure shows, thereby can reflect the situation of change of tank liquor concentration exactly.
The monitoring system that is directed against each reactor (groove) below respectively is described in detail; For convenience's sake; The free alkalinity control system that can be used for Degreasing Area Stage 1 and degreasing bath is at first described; Next describe the pH control system that can be used for the epithelium conversion tank, describe the electrical conductivity control system that can be used for rinsing bowl at last.
Free alkalinity control system
According to embodiments of the invention, the present invention proposes a kind of free alkalinity and control system.With reference to figure 1, according to embodiments of the invention, this free alkalinity control system 1000 comprises: sampler 1200, titration outfit 1300, feeding device 1400 and free alkalinity control device 1500.Wherein, according to embodiments of the invention, sampler 1200 is suitable for from reactor 1100, extracting sample.Titration outfit 1300 links to each other with sampler 1200; Thus, can from sampler 1200, accept the sample that extracted, and the sample that is received is carried out the basicity titration; Thereby can confirm the basicity of the sample that extracts, and then obtain the basicity parameter in the reactor 1100.Feeding device 1400 links to each other with free alkalinity control device 1500 with reactor 1100 respectively; Thus; Can on the one hand in reactor 1100, add feed liquid, feeding device 1400 behavior of in reactor 1100, adding feed liquid receives the control of free alkalinity control device 1500 on the other hand.Free alkalinity control device 1500 links to each other with feeding device 1400 with titration outfit 1300 respectively in addition; Thus; Basicity control device 1500 can receive the basicity parameter of sample from titration outfit 1300; Thereby can confirm to start or close feeding device 1400 and in reactor 1100, add feed liquid according to resulting basicity parameter value.Thereby; According to embodiments of the invention, can detect in real time the free alkalinity in the reactor effectively, thereby can monitor free basicity in the reactor in real time; And can effectively the basicity in the reactor be adjusted in the optimized scope according to predetermined parameters.
Free alkalinity control system 1000 can be used as metal works is carried out in the Coating Pretreatment technology free alkalinity in Degreasing Area Stage 1 and the degreasing bath being controlled according to an embodiment of the invention, thus the control system of the concentration of the degreasing agent in control Degreasing Area Stage 1 and the degreasing bath.Thus; According to embodiments of the invention; Sampler 1200 also can link to each other with second reactor with first reactor respectively, and wherein, first reactor is a Degreasing Area Stage 1; Second reactor is a degreasing bath, and feeding device 1400 solution that interpolation contains NaOH and sodium carbonate in said first and second reactors respectively is as degreasing agent.Thus; Utilization is according to the free alkalinity control system of the embodiment of the invention; Can carry out in the Coating Pretreatment process at metal works effectively; The free alkalinity of controlling effectively in Degreasing Area Stage 1 and the degreasing bath is monitored, thereby makes in the Coating Pretreatment process, can remain optimum reactant concentration.Certainly, those skilled in the art can be understood that, can different free alkalinity control systems 1000 be set respectively for Degreasing Area Stage 1 and degreasing bath, and perhaps two different free alkalinity control systems 1000 can shared a part of parts wherein.
According to one embodiment of present invention, free alkalinity control device 1500 can further link to each other with sampler 1200, and thus, free alkalinity control device 1500 can be controlled sampler 1200 and from reactor 1100, extract sample.And then, can take a sample automatically by free alkalinity control device 1500 control samplers, the automation that realizes sampling, detects and regulate and control is handled.According to one embodiment of present invention, sampler 1200 can extract sample according to the predetermined cycle from reactor 1100.Thus, can realize regularly taking a sample, make to be in best reactiveness in the reactor.About the predetermined cycle, those skilled in the art can confirm as required.According to embodiments of the invention; When this free alkalinity control system 1000 being applied to metal works carried out Coating Pretreatment technology; Can the cycle that should be scheduled to be defined as below 2 hours, preferred below 1 hour, or even the sampling of real-time continuous ground; Thus, can realize effective control to metal workpiece painting pre-treating technology parameter.According to embodiments of the invention, titration outfit can type do not receive special restriction.According to one embodiment of present invention, be provided with hydrochloric acid or sulfuric acid standard liquid in the said titration outfit, be used for said sample is carried out titration.Thus, can realize effectively that degreasing agent sample in Degreasing Area Stage 1 and the degreasing bath in the metal workpiece painting pre-treating technology is carried out titration to be detected.Pattern about free alkalinity control device 1500 control feeding devices 1400 does not receive special restriction.According to one embodiment of present invention; Be provided with controlling value in the free alkalinity control device 1500 in advance; When the basicity of detected sample is lower than this controlling value, then start feeding device 1400 and in reactor 1100, add feed liquid, and reinforced 1400 feeding quantity of putting of adorning of control.Thus, can effectively the free alkalinity in the reactor be adjusted in the optimized scope as required.Numerical value about controlling value; Those skilled in the art can confirm according to the needed optimum condition that reacts in the reactor; For example can take a sample to the reaction system under the optimum reaction conditions, and carry out titration through identical titration condition, resulting numerical value is controlling value.
Free alkalinity control system 1000 can be used as metal works is carried out in the Coating Pretreatment technology free alkalinity in Degreasing Area Stage 1 and the degreasing bath being controlled according to an embodiment of the invention, thereby the present invention proposes a kind of method of metal works being carried out Coating Pretreatment.According to embodiments of the invention, this comprises the method that metal works carries out Coating Pretreatment:
At first, metal works is carried out preparatory ungrease treatment and ungrease treatment successively in Degreasing Area Stage 1 and degreasing bath, so that obtain metal works through ungrease treatment.According to embodiments of the invention, Degreasing Area Stage 1 is controlled system 1000 with foregoing free alkalinity independently respectively with degreasing bath and is linked to each other, and thus, in skimming processes, can control effectively to the free alkalinity in Degreasing Area Stage 1 and the degreasing bath respectively.According to one embodiment of present invention, before metal works is carried out preparatory ungrease treatment, can in the prerinse groove, carry out prerinse to metal works and handle.Thus, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
Next, the metal works that will pass through ungrease treatment carries out first washing in first rinsing bowl, will through the metal works of first washing in the epithelium conversion tank, utilize the epithelium transforming agent to handle, so that form epithelium on the surface of said metal works.
After the metal works that obtains surface formation epithelium, the metal works that the surface is formed epithelium carries out second washing in second rinsing bowl, so that obtain the metal works through Coating Pretreatment.
Link to each other because Degreasing Area Stage 1 is controlled system 1000 with foregoing free alkalinity respectively independently with degreasing bath, thereby in skimming processes, free alkalinity control system 1000 can control the free alkalinity in Degreasing Area Stage 1 and the degreasing bath respectively.Thus, can make that the free alkalinity in Degreasing Area Stage 1 and the degreasing bath is in the optimized scope, thereby improve the efficient and the effect of metal works being carried out Coating Pretreatment through in processing procedure, the free alkalinity in Degreasing Area Stage 1 and the degreasing bath being controlled.
According to one embodiment of present invention, in said Degreasing Area Stage 1 and degreasing bath, adopt the solution that contains NaOH and sodium carbonate that said metal works is carried out preparatory ungrease treatment and ungrease treatment.Thus, can carry out degreasing to metal works effectively, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
About this other parameters and condition of metal works being carried out the method for Coating Pretreatment, be as known in the art, repeat no more at this.
Based on aforementioned metal works is carried out the method for Coating Pretreatment, the invention allows for a kind of metal works, it is this method preparation of metal works being carried out Coating Pretreatment according to the present invention.Through the metal works that the method obtains, can be effectively applied to application and handle, and painting effect is good.
PH controls system
According to embodiments of the invention, the present invention proposes a kind of pH and control system.With reference to figure 2, according to embodiments of the invention, this free alkalinity control system 2000 comprises: sampler 2200, pH checkout gear 2300, feeding device 2400 and pH control device 2500.Wherein, according to embodiments of the invention, sampler 2200 is suitable for from reactor 2100, extracting sample.PH control device 2500 links to each other with sampler 2200; Thus, can from sampler 2200, accept the sample that extracted, and the sample that is received carried out pH detect; Thereby can confirm the pH of the sample that extracts, and then obtain the basicity parameter in the reactor 2100.Feeding device 2400 links to each other with pH control device 2500 with reactor 2100 respectively; Thus; Can on the one hand in reactor 2100, add feed liquid, feeding device 2400 behavior of in reactor 2100, adding feed liquid receives the control of pH control device 2500 on the other hand.PH control device 2500 links to each other with feeding device 2400 with pH checkout gear 2300 respectively in addition; Thus; Basicity control device 2500 can receive the pH parameter of sample from pH checkout gear 2300; Thereby can confirm to start or close feeding device 2400 and in reactor 2100, add feed liquid according to resulting pH parameter value.Thereby, according to embodiments of the invention, can detect in real time the pH in the reactor effectively, thereby can monitor free basicity in the reactor in real time, and can effectively the pH in the reactor 2100 be adjusted in the optimized scope according to predetermined parameters.
According to one embodiment of present invention, pH control device 2500 can further link to each other with sampler 2200, and thus, pH control device 2500 can be controlled sampler 2200 and from reactor 2100, extract sample.And then, can take a sample automatically by pH control device 2500 control samplers 2200, the automation that realizes sampling, detects and regulate and control is handled.According to one embodiment of present invention, sampler 2200 can extract sample according to the predetermined cycle from reactor 2100.Thus, can realize regularly taking a sample, make to be in best reactiveness in the reactor.About the predetermined cycle, those skilled in the art can confirm as required.According to embodiments of the invention; When this pH control system 1000 being applied to metal works carried out Coating Pretreatment technology; Can the cycle that should be scheduled to be defined as below 2 hours, preferred below 1 hour, or even the sampling of real-time continuous ground; Thus, can realize effective control to metal workpiece painting pre-treating technology parameter.According to embodiments of the invention, the type of pH checkout gear 2300 does not receive special restriction.According to one embodiment of present invention, the pH checkout gear is the pH meter that is connected with sensor, is used for that the sample that is extracted is carried out pH and detects.Thus, can realize effectively that epithelium transforming agent sample in the metal workpiece painting pre-treating technology is carried out titration to be detected.Pattern about pH control device 2500 control feeding devices 2400 does not receive special restriction.According to one embodiment of present invention; Be provided with controlling value in the pH control device 2500 in advance; Through the difference between calculation control value and the detected value, determine whether starting feeding device 2400 and in reactor 2100, add feed liquid, and reinforced 2400 feeding quantity of putting of adorning of control.Thus, can effectively the free alkalinity in the reactor be adjusted in the optimized scope as required.Numerical value about controlling value; Those skilled in the art can confirm according to the needed optimum condition that reacts in the reactor; For example can take a sample to the reaction system under the optimum reaction conditions; And detect through identical pH testing conditions, resulting numerical value is controlling value.
At first, metal works is carried out preparatory ungrease treatment and ungrease treatment successively in Degreasing Area Stage 1 and degreasing bath, so that obtain metal works through ungrease treatment.According to one embodiment of present invention, before metal works is carried out preparatory ungrease treatment, can in the prerinse groove, carry out prerinse to metal works and handle.Thus, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
Next, the metal works that will pass through ungrease treatment carries out first washing in first rinsing bowl, will through the metal works of first washing in the epithelium conversion tank, utilize the epithelium transforming agent to handle, so that form epithelium on the surface of said metal works.According to embodiments of the invention, the epithelium conversion tank links to each other with foregoing pH control system.Thus, can be in the epithelium conversion process, the pH of solution in the epithelium conversion tank is controlled.
After the metal works that obtains surface formation epithelium, the metal works that the surface is formed epithelium carries out second washing in second rinsing bowl, so that obtain the metal works through Coating Pretreatment.
Link to each other because Degreasing Area Stage 1 is controlled system 2000 with foregoing pH respectively independently with degreasing bath, thereby in skimming processes, pH control system 1000 can control the pH in the epithelium conversion tank.Thus, can make that the pH in the preparatory epithelium conversion tank is in the optimized scope, thereby improve the efficient and the effect of metal works being carried out Coating Pretreatment through in processing procedure, the pH in the epithelium conversion tank being controlled.
According to one embodiment of present invention, in the epithelium conversion tank, adopt be selected from nano ceramics inorganic agent and silane finish at least a to carrying out the epithelium conversion processing through first metal works washed.Thus, can carry out degreasing to metal works effectively, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
Based on aforementioned metal works is carried out the method for Coating Pretreatment, the invention allows for a kind of metal works, it is this method preparation of metal works being carried out Coating Pretreatment according to the present invention.Through the metal works that the method obtains, can be effectively applied to application and handle, and painting effect is good.
Electrical conductivity control system
According to embodiments of the invention, the present invention proposes a kind of electrical conductivity and control system.With reference to figure 1, according to embodiments of the invention, this electrical conductivity control system 3000 comprises: sampler 3200, electrical conductivity checkout gear 3300, feeding device 3400 and electrical conductivity control device 1500.Wherein, according to embodiments of the invention, sampler 3200 is suitable for from reactor 3100, extracting sample.Electrical conductivity checkout gear 3300 links to each other with sampler 3200; Thus, can from sampler 3200, accept the sample that extracted, and the sample that is received carried out electrical conductivity detect; Thereby can confirm the electrical conductivity of the sample that extracts, and then obtain the electrical conductivity parameter in the reactor 3100.Feeding device 3400 links to each other with electrical conductivity control device 1500 with reactor 3100 respectively; Thus; Can on the one hand in reactor 3100, add feed liquid, feeding device 3400 behavior of in reactor 3100, adding feed liquid receives the control of electrical conductivity control device 1500 on the other hand.Electrical conductivity control device 1500 links to each other with feeding device 3400 with electrical conductivity checkout gear 3300 respectively in addition; Thus; Electrical conductivity control device 1500 can receive the electrical conductivity parameter of sample from electrical conductivity checkout gear 3300; Thereby can confirm to start or close feeding device 3400 and in reactor 3100, add feed liquid according to resulting electrical conductivity parameter value.Thereby; According to embodiments of the invention, can detect in real time the electrical conductivity in the reactor effectively, thereby can monitor electrical conductivity in the reactor in real time; And can be according to predetermined parameters, effectively with the conductivity adjustment in the reactor to optimized scope.
Electrical conductivity control system 3000 can be used as metal works is carried out in the Coating Pretreatment technology electrical conductivity in the rinsing bowl being monitored according to an embodiment of the invention, thus the control system of the addition of the water in the control rinsing bowl.Said reactor is a rinsing bowl, and said feeding device adds water in said reactor.Thus, utilize electrical conductivity control system, can carry out in the Coating Pretreatment process at metal works effectively according to the embodiment of the invention; Monitor the electrical conductivity in the rinsing bowl effectively; Thereby can realize best washing effect, can not cause waste simultaneously, save cost water resource.Certainly, those skilled in the art can be understood that, can different electrical conductivity control system 3000 be set respectively for first rinsing bowl and second rinsing bowl, and perhaps two different electrical conductivity control systems 3000 can shared a part of parts wherein.
According to one embodiment of present invention, electrical conductivity control device 1500 can further link to each other with sampler 3200, and thus, electrical conductivity control device 1500 can be controlled sampler 3200 and from reactor 3100, extract sample.And then, can take a sample automatically by electrical conductivity control device 1500 control samplers, the automation that realizes sampling, detects and regulate and control is handled.According to one embodiment of present invention, sampler 3200 can extract sample according to the predetermined cycle from reactor 3100.Thus, can realize regularly taking a sample, make to be in best reactiveness in the reactor.About the predetermined cycle, those skilled in the art can confirm as required.According to embodiments of the invention; When this electrical conductivity control system 3000 being applied to metal works carried out Coating Pretreatment technology; Can the cycle that should be scheduled to be defined as below 2 hours, preferred below 1 hour, or even the sampling of real-time continuous ground; Thus, can realize effective control to metal workpiece painting pre-treating technology parameter.According to embodiments of the invention, the electrical conductivity checkout gear can type do not receive special restriction.Can be any electrical conductivity checkout gear as known in the art.Thus, can realize effectively that water sample in the rinsing bowl in the metal workpiece painting pre-treating technology is carried out titration to be detected.Pattern about electrical conductivity control device 1500 control feeding devices 3400 does not receive special restriction.According to one embodiment of present invention; Be provided with controlling value in the electrical conductivity control device 1500 in advance; When the electrical conductivity of detected sample is lower than this controlling value, then start feeding device 3400 and in reactor 3100, add feed liquid, and reinforced 3400 feeding quantity of putting of adorning of control.Thus, can regulate the addition of feed liquid as required, for example amount of water can be monitored the treatment effect in the reactor thus effectively.Numerical value about controlling value; Those skilled in the art can confirm according to the needed optimum condition that reacts in the reactor; For example can take a sample to the reaction system under the optimum reaction conditions, and carry out titration through identical titration condition, resulting numerical value is controlling value.According to one embodiment of present invention; Sampler 3200 further links to each other with feeding device 3400, so that the feed liquid in the sample adding device 3400 is taken a sample, and passes through the electrical conductivity that electrical conductivity checkout gear 3300 detects feed liquid in the sample adding devices 3400; Wherein, Electrical conductivity control device 3500 determines whether to start said feeding device and in said reactor, adds feed liquid, and control the feeding quantity of said feeding device based on the difference of the electrical conductivity of feed liquid in the electrical conductivity of sample and the sample adding device.Thus, can monitor the treatment effect in the reactor 3100 through the monitoring feed liquid in the electrical conductivity difference that gets into reactor 3100 front and back.
Electrical conductivity control system 3000 can be used as metal works is carried out in the Coating Pretreatment technology electrical conductivity in the rinsing bowl being controlled according to an embodiment of the invention, thereby the present invention proposes a kind of method of metal works being carried out Coating Pretreatment.According to embodiments of the invention, this comprises the method that metal works carries out Coating Pretreatment:
At first, metal works is carried out preparatory ungrease treatment and ungrease treatment successively in Degreasing Area Stage 1 and degreasing bath, so that obtain metal works through ungrease treatment.According to one embodiment of present invention, before metal works is carried out preparatory ungrease treatment, can in the prerinse groove, carry out prerinse to metal works and handle.Thus, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
Next, the metal works that will pass through ungrease treatment carries out first washing in first rinsing bowl, will through the metal works of first washing in the epithelium conversion tank, utilize the epithelium transforming agent to handle, so that form epithelium on the surface of said metal works.
After the metal works that obtains surface formation epithelium, the metal works that the surface is formed epithelium carries out second washing in second rinsing bowl, so that obtain the metal works through Coating Pretreatment.
According to embodiments of the invention, first rinsing bowl and second rinsing bowl link to each other with foregoing electrical conductivity control system respectively independently, so that in water-washing process, respectively the electrical conductivity of solution in first rinsing bowl and second rinsing bowl are monitored.Thus; Can be through in processing procedure, the amount of water in the rinsing bowl being controlled; Thereby can monitor the washing effect in the rinsing bowl effectively, realize the best washing effect, thereby improve the efficient and the effect of metal works being carried out Coating Pretreatment metal works.
Based on aforementioned metal works is carried out the method for Coating Pretreatment, the invention allows for a kind of metal works, it is this method preparation of metal works being carried out Coating Pretreatment according to the present invention.Through the metal works that the method obtains, can be effectively applied to application and handle, and painting effect is good.
Metal works is carried out the system of Coating Pretreatment
The present invention proposes a kind of system 4000 that metal works is carried out Coating Pretreatment.According to embodiments of the invention, this system 4000 comprises: Degreasing Area Stage 1 4100, degreasing bath 4200, first rinsing bowl 4300, epithelium conversion tank 4400 and second rinsing bowl 4500.Wherein, Degreasing Area Stage 1 4100 is suitable for metal works is carried out preparatory ungrease treatment.Degreasing bath 4200 links to each other with Degreasing Area Stage 1 4100, and the metal works through preparatory ungrease treatment is carried out ungrease treatment. and first rinsing bowl 4300 links to each other with degreasing bath 4200, is used for the metal works through ungrease treatment is carried out first washing.Epithelium conversion tank 4400 links to each other with first rinsing bowl 4300, is used for utilizing the epithelium transforming agent to handle the metal works through first washing, so that form epithelium on the surface of metal works.Second rinsing bowl 4500 links to each other with epithelium conversion tank 4400, is used for the metal works of surface formation epithelium is carried out second washing, so that obtain the metal works through Coating Pretreatment.
According to embodiments of the invention, this system 4000 further comprises free alkalinity control system 4600, pH control system 4800 and electrical conductivity control system 4700.Wherein, free alkalinity control system 4600 links to each other with degreasing bath 4200 with Degreasing Area Stage 1 4100 respectively, is used for the free alkalinity of Degreasing Area Stage 1 4100 and degreasing bath 4200 is controlled.PH control system 4800 links to each other with epithelium conversion tank 4400, is used for the pH of epithelium conversion tank 4400 solution is controlled.Electrical conductivity control system 4700 links to each other with second rinsing bowl 4500 with first rinsing bowl 4300 respectively, and the electrical conductivity that is used for stating first rinsing bowl 4300 and second rinsing bowl, 4500 solution is controlled.
According to embodiments of the invention, free alkalinity control system further comprises: first sampler, titration outfit, first feeding device and free alkalinity control device.Wherein, first sampler links to each other with degreasing bath 4200 with Degreasing Area Stage 1 4100 respectively, and is suitable for from Degreasing Area Stage 1 4100 and degreasing bath 4200, extracting sample.Titration outfit links to each other with first sampler, and is suitable for the sample that first sampler is extracted is carried out the basicity titration, so that confirm the basicity of said sample.First feeding device, said first feeding device links to each other with degreasing bath with said Degreasing Area Stage 1 respectively, is used for adding feed liquid to said Degreasing Area Stage 1 and degreasing bath, and said feed liquid is the solution that contains NaOH and sodium carbonate.The free alkalinity control device links to each other with feeding device with titration outfit respectively, so that based on the basicity of the said sample that obtains in the said titration outfit, starts or closes said feeding device and in said Degreasing Area Stage 1 and degreasing bath, add feed liquid.
According to embodiments of the invention, pH control system further comprises: second sampler, pH checkout gear, second feeding device and pH control device.Wherein, second sampler links to each other with epithelium conversion tank 4400, and is suitable for from epithelium conversion tank 4400, extracting sample.The pH checkout gear links to each other with sampler, and the sample that is suitable for that sampler is extracted carries out pH and detect, so that confirm the pH of sample.Second feeding device links to each other with said epithelium conversion tank 4400, is used for adding feed liquid to said epithelium conversion tank 4400, and this feed liquid is be selected from nano ceramics transforming agent and silane finish at least a as the epithelium transforming agent.The pH control device links to each other with feeding device with the pH checkout gear respectively, so that based on the pH of the said sample that obtains in the pH checkout gear, starts or closes said feeding device and in said epithelium conversion tank, add feed liquid.
According to embodiments of the invention, electrical conductivity control system 4000 further comprises: the 3rd sampler, electrical conductivity checkout gear, the 3rd feeding device, electrical conductivity control device.Wherein, the 3rd sampler links to each other with second rinsing bowl 4500 with first rinsing bowl 4300 respectively, and is suitable for from first rinsing bowl 4300 and second rinsing bowl 4500, extracting sample.The electrical conductivity checkout gear links to each other with sampler, and the sample that is suitable for that sampler is extracted carries out electrical conductivity and detect, so that confirm the electrical conductivity of said sample.The 3rd feeding device links to each other with second rinsing bowl 4500 with first rinsing bowl 4300 respectively, is used for adding feed liquid to first rinsing bowl 4300 and second rinsing bowl 4500, and feed liquid is a water.The electrical conductivity control device links to each other with said feeding device with the electrical conductivity checkout gear respectively, so that based on the electrical conductivity of the sample that obtains in the electrical conductivity checkout gear, starts or closes feeding device and in first rinsing bowl 4300 and second rinsing bowl 4500, add water.
Utilize this system 4000, can carry out Coating Pretreatment to metal works effectively, and can monitor metal works in real time and carry out the parameters in the Coating Pretreatment process, realize best treatment effect.
According to one embodiment of present invention, said free alkalinity control device further links to each other with said first sampler, is used for controlling said first sampler and extracts sample from said Degreasing Area Stage 1 and degreasing bath respectively; Said pH control device further links to each other with said second sampler, is used for controlling said second sampler and extracts sample from said epithelium conversion tank; Perhaps said electrical conductivity control device further links to each other with said the 3rd sampler, is used for controlling said the 3rd sampler and extracts sample from said first rinsing bowl and second rinsing bowl.Thus, can control sampler by control device and take a sample automatically, the automation that realizes sampling, detects and regulate and control is handled.According to one embodiment of present invention, said first sampler, second sampler and the 3rd sampler one of at least according to predetermined periodicity extraction sample.Thus, can realize regularly taking a sample, make to be in best reactiveness in the reactor.。About the predetermined cycle, those skilled in the art can confirm as required.According to embodiments of the invention, can the cycle that should be scheduled to be defined as below 2 hours, preferred below 1 hour, or even the sampling of real-time continuous ground, thus, can realize effective control to metal workpiece painting pre-treating technology parameter.
According to embodiments of the invention, titration outfit can type do not receive special restriction.According to one embodiment of present invention, be provided with hydrochloric acid or sulfuric acid standard liquid in the said titration outfit, be used for said sample is carried out titration.Thus, can realize effectively that degreasing agent sample in Degreasing Area Stage 1 and the degreasing bath in the metal workpiece painting pre-treating technology is carried out titration to be detected.
Control the pattern of first feeding device about the free alkalinity control device, do not receive special restriction.According to one embodiment of present invention; Be provided with first controlling value in the free alkalinity control device in advance; When the basicity of stating sample is lower than first controlling value, starts said first feeding device and in Degreasing Area Stage 1 or degreasing bath, add feed liquid, and control the feeding quantity of said first feeding device.Thus, can effectively the free alkalinity in Degreasing Area Stage 1 or the degreasing bath be adjusted in the optimized scope as required.Numerical value about controlling value; Those skilled in the art can confirm according to the needed optimum condition that reacts in the reactor; For example can take a sample to the reaction system under the optimum reaction conditions, and carry out titration through identical titration condition, resulting numerical value is controlling value.
Pattern about pH control device control feeding device does not receive special restriction.According to one embodiment of present invention; Be provided with second controlling value in the pH control device in advance; Based on the pH of said sample and the difference of said second controlling value, start second feeding device and in said epithelium conversion tank, add feed liquid, and control the feeding quantity of second feeding device.Thus, can effectively the pH in the epithelium conversion tank be adjusted in the optimized scope as required.
According to one embodiment of present invention; Be provided with the 3rd controlling value in the electrical conductivity control device in advance; Based on the electrical conductivity of sample and the difference of the 3rd controlling value; Determine whether to start the 3rd feeding device and in said first rinsing bowl and second rinsing bowl, add feed liquid, and control the feeding quantity of the 3rd feeding device.Thus, can regulate the addition of feed liquid as required, for example amount of water can be monitored the treatment effect in the reactor thus effectively.
According to one embodiment of present invention; The 3rd sampler further links to each other with the feeding device of electrical conductivity control system; So that the feed liquid in the said sample adding device is taken a sample; And detect the electrical conductivity of feed liquid in the said sample adding device through the electrical conductivity checkout gear, wherein, said electrical conductivity control device is based on the difference of the electrical conductivity of feed liquid in the electrical conductivity of sample and the said sample adding device; Determine whether to start said feeding device and in said reactor, add feed liquid, and control the feeding quantity of said feeding device.Thus, can monitor the treatment effect in the reactor through the monitoring feed liquid in the electrical conductivity difference that gets into the rinsing bowl front and back.
According to one embodiment of present invention, said basicity control device, said pH control device are arranged in the identical equipment with the electrical conductivity control device.Thus, can utilize a set of equipment to realize simultaneously basicity, pH and electrical conductivity are controlled easily.
The invention allows for a kind of method of metal works being carried out Coating Pretreatment.According to embodiments of the invention, this method comprises:
At first, metal works is carried out preparatory ungrease treatment and ungrease treatment successively in Degreasing Area Stage 1 and degreasing bath, so that obtain metal works through ungrease treatment.According to embodiments of the invention, Degreasing Area Stage 1 links to each other with degreasing bath and links to each other with free alkalinity control system respectively, so that in skimming processes, the free alkalinity in Degreasing Area Stage 1 and the degreasing bath is controlled.
Next, the metal works that will pass through ungrease treatment carries out first washing in first rinsing bowl, will through the metal works of first washing in the epithelium conversion tank, utilize the epithelium transforming agent to handle, so that form epithelium on the surface of metal works.According to embodiments of the invention, the epithelium conversion tank links to each other with pH control system, so that in the epithelium conversion process, the pH of solution in the epithelium conversion tank is controlled.
Then, after the surface of metal works formed epithelium, the metal works that the surface is formed epithelium carried out second washing in second rinsing bowl, so that obtain the metal works through Coating Pretreatment.According to embodiments of the invention,, first rinsing bowl links to each other with electrical conductivity control system respectively with second rinsing bowl, so that in water-washing process, the electrical conductivity of solution in first rinsing bowl and second rinsing bowl is controlled.
According to embodiments of the invention, free alkalinity control system further comprises:
First sampler, first sampler links to each other with degreasing bath with Degreasing Area Stage 1 respectively, and is suitable for from Degreasing Area Stage 1 and degreasing bath, extracting sample;
Titration outfit, titration outfit links to each other with first sampler, and is suitable for the sample that first sampler is extracted is carried out the basicity titration, so that confirm the basicity of sample;
First feeding device, first feeding device links to each other with degreasing bath with Degreasing Area Stage 1 respectively, is used for adding feed liquid to Degreasing Area Stage 1 and degreasing bath, and feed liquid is the solution that contains NaOH and sodium carbonate;
The free alkalinity control device, the free alkalinity control device links to each other with feeding device with titration outfit respectively, so that based on the basicity of the sample that obtains in the titration outfit, starts or closes feeding device and in Degreasing Area Stage 1 and degreasing bath, add feed liquid.
PH control system further comprises:
Second sampler, second sampler links to each other with the epithelium conversion tank, and is suitable for from the epithelium conversion tank, extracting sample;
The pH checkout gear, the pH checkout gear links to each other with sampler, and the sample that is suitable for that sampler is extracted carries out pH and detect, so that confirm the pH of sample;
Second feeding device, second feeding device links to each other with the epithelium conversion tank, is used for adding feed liquid to the epithelium conversion tank, and feed liquid is be selected from nano ceramics transforming agent and silane finish at least a;
The pH control device, the pH control device links to each other with feeding device with the pH checkout gear respectively, so that based on the pH of the sample that obtains in the pH checkout gear, starts or closes feeding device and in the epithelium conversion tank, add feed liquid.
Electrical conductivity control system further comprises:
The 3rd sampler, the 3rd sampler link to each other with second rinsing bowl with first rinsing bowl respectively, and are suitable for from first rinsing bowl and second rinsing bowl, extracting sample;
The electrical conductivity checkout gear, the electrical conductivity checkout gear links to each other with sampler, and the sample that is suitable for that sampler is extracted carries out electrical conductivity and detect, so that confirm the electrical conductivity of sample;
The 3rd feeding device, the 3rd feeding device link to each other with second rinsing bowl with first rinsing bowl respectively, are used for adding feed liquid to first rinsing bowl and second rinsing bowl, and feed liquid is a water;
The electrical conductivity control device, the electrical conductivity control device links to each other with feeding device with the electrical conductivity checkout gear respectively, so that based on the electrical conductivity of the sample that obtains in the electrical conductivity checkout gear, starts or closes feeding device and in first rinsing bowl and second rinsing bowl, add water.
Thus, can carry out in the Coating Pretreatment process, effectively the parameters in institute's processing process monitored, thereby improve the efficient and the effect of metal works being carried out Coating Pretreatment metal works.
According to one embodiment of present invention, before metal works is carried out preparatory ungrease treatment, metal works is carried out prerinse handle in the prerinse groove.Thus, can further improve the efficient and the effect of metal works being carried out Coating Pretreatment.
Based on aforementioned metal works is carried out the method for Coating Pretreatment, the invention allows for a kind of metal works, it is this method preparation of metal works being carried out Coating Pretreatment according to the present invention.Through the metal works that the method obtains, can be effectively applied to application and handle, and painting effect is good.
About this other parameters and condition of metal works being carried out the method for Coating Pretreatment, be as known in the art, repeat no more at this.
Present invention is described through specific embodiment below, need to prove that this embodiment only is for illustrative purposes, and can not make restriction to the present invention by any way.
Embodiment 1
With reference to figure 5-8, the method for the automatic Detection & Controling of a kind of coated metal pre-treatment tank liquor concentration is provided: the monitoring system that adopts upper industrial computer, display screen and configuration software to form; PLC, touch-screen forming control system; Detect a kind of method that coated metal pre-treatment tank liquor concentration is detected automatically and controls of forming with the subsystem of feeding device with each tank liquor.Detect, the epithelium conversion fluid that contains nano ceramics transforming agent or silane finish detected, through the electrical conductivity on-line automatic detection device cleaning sink water electric conductivity detected through online free alkalinity automatic detection device pre-treatment contains alkali cleaner to metal Degreasing Area Stage 1 liquid, degreasing tank liquor free alkalinity through online PH automatic detection device; Through PLC the detection data of each checkout gear transmission are analyzed, compare, judged, add the method for tank liquor component according to judged result automatically.Comprise:
The automatic Detection & Controling method of (1) the preparatory degreasing of coated metal pre-treatment, degreasing tank liquor concentration
Adopt the online titrator of binary channels regularly to change; Respectively preparatory degreasing, the degreasing tank liquor free alkalinity that uses alkaline defatting agent detected; And detected value is converted into standard electric signal input PLC, set control range with free alkali concentration and compare, according to comparative result; By the addition of PLC control degreasing agent, realize the automatic control of preparatory degreasing, degreasing bath concentration.
(2) coated metal pre-treatment epithelium transforms the automatic Detection & Controling method of tank liquor concentration
Adopting PH on-line testing appearance that the epithelium that uses nano ceramics transforming agent (or silane finish) is transformed tank liquor PH detects; Detected value is converted into standard electric signal input PLC; Compare with setting value pH value scope; According to comparative result,, realize that epithelium transforms the automatic control of tank liquor concentration by the addition of PLC control epithelium transforming agent (nano ceramics transforming agent or silane finish).
(3) the automatic Detection & Controling method of coated metal pre-treatment washing tank liquor concentration
Adopted that electrical conductivity on-line testing appearance carries out online detection to washing tank liquor electrical conductivity and water for cleaning electrical conductivity to be added is carried out online detection; Detected value is converted into standard electric signal input PLC; Compare through the difference of two test values and the electrical conductivity control range of setting, by the addition of PLC control water for cleaning.
Following with reference to figure 5-8, operation is described in detail to the system of this embodiment.
One cover binary channels online titration checkout gear 11 by the regular draw samples from coated metal pre-treatment Degreasing Area Stage 1 of sampling pump 11-1, utilizes the automatic titration of standard liquid 11-3 of hydrochloric acid (or sulfuric acid) configuration; Titration mid point pH value is set at 8.3, and the signal of telecommunication that titration results is transformed into standard sends the control system that PLC10 forms to, compares through the technology controlling and process scope with standard; When being lower than the control point; The control information of will starting shooting passes to measuring pump 17, extracts degreasing agent 6 and adds in the Degreasing Area Stage 11, and addition is according to the concentration comparing difference; According to sampling gap detection time and depletion rate, confirm the addition size.After the online titration checkout gear 11 process self-cleaning programs; According to the assay intervals time of setting, by same mode, by another set of sampling pump 11-2 draw samples from degreasing bath; Send testing result to PLC10 after the titration; Through compare, judge that PLC10 exports control signal according to judged result with setting value, control measuring pump 18 extracts degreasing agent 7 to be added in the degreasing bath 2.
One cover is transformed the online detection of pH value of tank liquor 4 to epithelium by online PH transmitter 15, PH sensor 15-1 and Pt1000 temperature compensation sensor 15-2; Testing result is converted into electrical information sends PLC10 to; Through calculating after relatively with the standard control range; According to gap sampling detection time and depletion rate, confirm the addition size.PLC10 will open, the information of stopping passes to measuring pump 19, extract epithelium transforming agent 8 and add in the epithelium conversion tank 4.
The online conductivity detector that one cover is made up of online electrical conductivity transmitter 14, conductivity sensor 14-1 and Pt1000 temperature compensation sensor 14-2 is to the electrical conductivity detection of last rinsing bowl 3-2 in one group of rinsing bowl of Coating Pretreatment; Change testing result into the standard electric signal and send PLC10 to; With one the cover by online electrical conductivity transmitter 35; The supplementing water electrical conductivity checkout gear that conductivity sensor 35-1 and Pt1000 temperature sensor 35-2 form; Supplementing water 28 water quality detection results are sent to PLC10 to be calculated; Difference and standard conductivity control range compare, send the magnetic valve in the water replanishing device of forming by normally open solenoid valve 20, hand switch 21, normally closed solenoid valve 22, hand switch 22 to opening, stop signal, through open, rinse water is added in control between the stopping time.
The online conductivity detector that one cover is made up of online electrical conductivity transmitter 16, conductivity sensor 16-1 and Pt1000 temperature compensation sensor 16-2 is to the electrical conductivity detection of last rinsing bowl 5-2 in one group of rinsing bowl of Coating Pretreatment; Change testing result into the standard electric signal and send the control system that PLC10 forms to; With one the cover by online electrical conductivity transmitter 35; The supplementing water electrical conductivity checkout gear that conductivity sensor 35-1 and Pt1000 temperature sensor 35-2 form; Supplementing water 28 water quality detection results are sent to PLC10 to be calculated; Difference and standard conductivity control range compare, send the magnetic valve in the water replanishing device of forming by normally open solenoid valve 24, hand switch 25, normally closed solenoid valve 26, hand switch 27 to opening, stop signal, through open, rinse water is added in control between the stopping time.
Referring to Fig. 6, instrument control principle figure is: the monitoring system that coated metal pre-treatment tank liquor concentration is made up of upper industrial computer 9, display screen 38; The control system that forms by PLC10, touch-screen 39 and electric components; Each subsystem of forming by each instrumentation and component feeding device.
After system opens; Various detection signals in each subsystem: online titrator 11 data detection signals of free alkalinity, treated by PH transmitter 15 through correspondence of PH sensor 15-1, conductivity sensor 14-1,16-1,35-1 and Pt1000 temperature-compensating probe 14-2,15-2,16-2,35-2, various real-time data signals that electrical conductivity transmitter 14,16,35 will record, amplify; Be converted into the signal of telecommunication of standard, constantly be input among the PLC10 through input interface; PLC10 analyzes the signal of telecommunication of receiving, compare, judge according to the setting of coded program in it; By PLC10 according to the control program that has designed respectively to measuring pump; The magnetic valve group is exported different electric signals, controls its unlatching and closure; Accomplish the Detection & Controling process, reach online detection and the purpose of controlling automatically.
The human-computer dialogue environment that the control system that PLC10 and touch-screen 39 are formed forms through touch-screen 39 configuration softwares is realized the visualization function to PLC10.The signal that PLC10 receives is transferred to touch-screen 39 after changing, touch-screen 39 shows real-time free alkalinity, pH value, electrical conductivity, temperature value, reaches free alkalinity, PH, conductivity variations curve and alarm indication function.Set through 39 pairs of control of touch-screen parameter, send instruction, control the on-the-spot executing agency of each subsystem to PLC10.
The monitoring system of being made up of upper industrial computer 9 and display screen 38 and configuration software is connected with PLC10 control system through Ethernet; Through PLC10 all field datas are read; Comprise that equipment state shows, the characterization processes parameter shows log history data, report making and printing function.Realize on-line monitoring, report making and data hold function.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (9)
1. an electrical conductivity control system is characterized in that, comprising:
Sampler, said sampler links to each other with said reactor, and is suitable for from said reactor, extracting sample;
The electrical conductivity checkout gear, said electrical conductivity checkout gear links to each other with said sampler, and the sample that is suitable for that said sampler is extracted carries out electrical conductivity and detect, so that confirm the electrical conductivity of said sample;
Feeding device, said feeding device links to each other with said reactor, is used for adding feed liquid to said reactor;
The electrical conductivity control device; Said electrical conductivity control device links to each other with said feeding device with said electrical conductivity checkout gear respectively; So that based on the electrical conductivity of the said sample that obtains in the said electrical conductivity checkout gear, start or close said feeding device and in said reactor, add feed liquid.
2. system according to claim 1 is characterized in that, said reactor is a rinsing bowl, and said feeding device adds water in said reactor.
3. system according to claim 1 is characterized in that, said electrical conductivity control device further links to each other with said sampler, is used for controlling said sampler and extracts sample from said reactor.
4. system according to claim 3 is characterized in that, said sampler extracts sample according to the predetermined cycle from said reactor.
5. system according to claim 1; It is characterized in that; Be provided with controlling value in advance in the said electrical conductivity control device; Based on the electrical conductivity of said sample and the difference of said controlling value, determine whether to start said feeding device and in said reactor, add feed liquid, and control the feeding quantity of said feeding device.
6. system according to claim 1 is characterized in that said sampler further links to each other with feeding device, so that the feed liquid in the said sample adding device is taken a sample, and detects the electrical conductivity of feed liquid in the said sample adding device through the electrical conductivity checkout gear,
Wherein,
Said electrical conductivity control device determines whether to start said feeding device and in said reactor, adds feed liquid, and control the feeding quantity of said feeding device based on the difference of the electrical conductivity of feed liquid in the electrical conductivity of said sample and the said sample adding device.
7. one kind is carried out the method for Coating Pretreatment to metal works, it is characterized in that, comprises
Said metal works is carried out preparatory ungrease treatment and ungrease treatment successively in Degreasing Area Stage 1 and degreasing bath, so that obtain metal works through ungrease treatment;
Said metal works through ungrease treatment is carried out first washing in first rinsing bowl,
To through the metal works of first washing in the epithelium conversion tank, utilize the epithelium transforming agent to handle, so that form epithelium on the surface of said metal works; And
The metal works that the surface is formed epithelium carries out second washing in second rinsing bowl, so that obtain metal works through Coating Pretreatment,
Wherein,
Said first rinsing bowl and said second rinsing bowl link to each other with each described electrical conductivity control system of claim 1-6 respectively independently; So that in water-washing process, respectively the electrical conductivity of solution in said first rinsing bowl and said second rinsing bowl is controlled.
8. method according to claim 7 is characterized in that, before metal works is carried out preparatory ungrease treatment, said metal works is carried out prerinse handle in the prerinse groove.
9. metal works, it is according to claim 7 or 8 described methods preparations.
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| CN2011104022491A CN102513275A (en) | 2011-12-06 | 2011-12-06 | Conductivity control system and application thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288536A (en) * | 1998-01-24 | 2001-03-21 | 汉高两合股份公司 | Automatic command and control of cleansing baths by means of alkalinity |
| CN102114460A (en) * | 2011-03-24 | 2011-07-06 | 常州市骠马涂装系统工程有限公司 | Pretreatment process for coating |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288536A (en) * | 1998-01-24 | 2001-03-21 | 汉高两合股份公司 | Automatic command and control of cleansing baths by means of alkalinity |
| CN102114460A (en) * | 2011-03-24 | 2011-07-06 | 常州市骠马涂装系统工程有限公司 | Pretreatment process for coating |
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Application publication date: 20120627 |