CN1138022C - Equipment and technology for electroplating steel pipe inner wall by using auxiliary anode and spray-plating zinc solution - Google Patents
Equipment and technology for electroplating steel pipe inner wall by using auxiliary anode and spray-plating zinc solution Download PDFInfo
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- CN1138022C CN1138022C CNB001005944A CN00100594A CN1138022C CN 1138022 C CN1138022 C CN 1138022C CN B001005944 A CNB001005944 A CN B001005944A CN 00100594 A CN00100594 A CN 00100594A CN 1138022 C CN1138022 C CN 1138022C
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Abstract
The present invention relates to a process and an apparatus for auxiliary anode spraying zinc liquid electroplating the inner wall of a steel conduit, and the apparatus comprises an electroplating tank, a cathode, a main anode, an auxiliary anode and a power supply circuit supplied to the auxiliary anode, wherein the auxiliary anode is at least a hollow steel pipe outside which an insulating layer for matching with the cathode of the inner wall of a steel pipe to be electroplated is arranged, liquid spraying holes are distributed on the hollow steel pipe, a liquid inlet and a liquid outlet of a circulating pump are respectively connected with an electroplating liquid circulating pipe, a circulating pipe of the liquid outlet is connected with one end of the auxiliary anode, the other end of which is sealed, and the liquid inlet is connected with zinc liquid of the electroplating tank by the electroplating liquid circulating pipe. The present invention satisfies the requirements for the different coating thickness of the inner and the outer walls of pipes to be electroplated.
Description
The present invention relates to a kind of electroplating device and technology.
Existing electroplating device and technology comprise plating tank and negative electrode, anode, are not suitable for plating the elongated tubular product, give the elongated tubular product zinc-plated, adopt solid reinforcing bar plug of insertion in the steel conduit usually, and it is linked to each other with the rectifier anode.Reinforcing bar plug overcoat has the plastic pipe of aperture or outward around plastic ties, insulate so as to the negative electrode tube wall with steel conduit.The method of this supplementary anode, after the supplementary anode energising, zine ion in the guiding galvanizing flux deposits the zinc molecule to steel conduit negative electrode inwall, form the inwall electro-galvanized layer, between supplementary anode bar reinforcement and the steel conduit inwall negative electrode, have only a very narrow space, the limited amount of galvanizing flux, when supplementary anode continues energising, narrow space zinc ion concentration step-down, steel conduit inwall deposition zinc molecular velocity is slack-off.Because the steel conduit inwall has hydrogen to discharge in that zine ion is sedimentary simultaneously, along with escaping of hydrogen, produces negative pressure.Atmosphere presses to the narrow gap of the galvanizing flux in the plating tank between supplementary anode and steel conduit inwall, and the galvanizing flux in the groove is moved to narrow gap, replenishes into some new zine ions.However, the zinc ion concentration in the narrow gap is always less than the zinc ion concentration in the plating tank.Its result, in same electroplating time, the galvanized layer thickness of steel conduit inwall is always less than the galvanized layer thickness of outer wall.Usually, inner wall thickness only is equivalent to 1/10～1/5 of outer wall thickness.Comparatively speaking, the corrosion resistance nature of inwall is much smaller than the corrosion resistance nature of outer wall.For preembedded steel conduit in concrete, but require the zinc coating of the zinc coating of inwall greater than outer wall.Obviously, existing supplementary anode electroplating technology can not satisfy such requirement.
The purpose of this invention is to provide a kind of novel supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment and technology, can arbitrarily control the thickness of pipe inner wall coating, satisfy requirement the different galvanized layer thicknesses of steel conduit inside and outside wall.
The technical scheme of supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment of the present invention is:
This equipment comprises plating tank, negative electrode, main anode, the power source circuit of supplementary anode and supply supplementary anode, it is characterized in that: supplementary anode is an at least one hollow steel pipe that hangs on the hanger, hollow steel pipe be furnished with outward with by the matched insulation layer of steel plating inside pipe wall negative electrode, be furnished with spray hole on the hollow steel pipe, the fluid inlet of recycle pump is connected the plating bath circulation tube respectively with liquid outlet, the circulation tube of liquid outlet is connected with an end of supplementary anode, the other end sealing of supplementary anode, the fluid inlet of recycle pump is joined by the galvanizing flux of plating bath circulation tube and plating tank, makes galvanizing flux can form at least one pump circulation loop at plating tank with between by the steel plating pipe inner wall.
Spray hole diameter on the above-mentioned hollow steel pipe is the 2-4 millimeter.
Above-mentioned on the hollow steel pipe cross section, adjacent spray hole to the angle in axle center is 90～120 °.
Spray hole on the above-mentioned hollow steel pipe is far away more from the recycle pump liquid outlet, and pitch of holes is more little.
Above-mentioned insulation layer is nylon mesh or plastics netting.
Above-mentioned hanger is a hanger laterally or longitudinally.
The power source circuit of above-mentioned supply supplementary anode is adjustable direct current plate circuit.
Power source circuit is in series with rectifier or is connected with rectifier and variable resistor at the supplementary anode two ends.
A kind of supplementary anode spray-plating zinc solution electroplating steel pipe inner wall technology, its processing method is:
(1). the hollow steel pipe supplementary anode is inserted by in the plating tubular workpieces insulation layer of packing into betwixt;
(2). galvanizing flux is being plated on the tubular workpieces inwall by the recycle pump forcing to deposit by circulation loop;
(3). according to the requirement to steel conduit inside and outside wall coating different ratios thickness, determine the pressure and the flow of recycle pump supply galvanizing flux, interior wall coating requires thick more, and deposition zinc speed is fast more, and recycle pump fluid inlet gate leaves greatly more, increased pressure, flow strengthens; Otherwise gate is turned down, and pressure reduces, and flow reduces;
(4). regulate the rectifier in the supplementary anode power source circuit, make electric current become adjustable direct current anode;
(5). when plating piece inwall generation two ends zinc coating is inconsistent,, voltage, electric current are changed by regulating placed in-line variable resistor in main anode and the supplementary anode power source circuit; The tubular workpieces inwall requires thick more, and the voltage of supplementary anode should increase, and electric current should strengthen.
Working process of the present invention: the hollow steel pipe supplementary anode is inserted in the tubular workpieces, the insulation layer of packing into betwixt, galvanizing flux by circulation loop by the recycle pump forcing to deposit on the tubular workpieces inwall.Can determine the pressure and the flow of recycle pump supply galvanizing flux according to requirement to steel conduit inside and outside wall zinc coating different ratios thickness.The inwall zinc coating requires thick more, and deposition zinc speed is fast more, and the fluid inlet gate of recycle pump is opened greatly more, makes increased pressure, and flow strengthens; Otherwise gate is turned down, and pressure reduces, and flow reduces.Can also voltage, electric current be changed by regulating placed in-line variohm in main anode and the supplementary anode line.The tubular workpieces inwall requires thick more, and the voltage of supplementary anode should increase, and electric current should strengthen.When inwall generation two ends zinc coating is inconsistent, also to adjust the variohm that is connected on the supplementary anode two ends, make each position zinc coating uniformity of inwall.
Advantage of the present invention is: the supplementary anode of hollow shape is the anodic carrier, is again the carrier of circulation fluid, or the carrier of insulated nylon silk screen.Can change the power of transfusion by the galvanizing flux in pump circulation loop, arbitrarily control and adjust the thickness of wall coating in the tubular workpieces, satisfy requirement the different galvanized layer thicknesses of steel conduit inside and outside wall.Adopt this technology rate height that comes into force, zinc coating quality is good, has solved the zinc-plated a great problem of steel conduit inwall, is fit to the plating of tubular workpiece.
Below in conjunction with drawings and Examples the present invention is described in detail:
Fig. 1 is a plating bath recycle system structural representation of the present invention;
Fig. 2 is the supplementary anode synoptic diagram;
Fig. 3 is the A-A sectional view of Fig. 2;
As Figure 1-3, this equipment comprises plating tank 1, negative electrode 7, main anode 5, supplementary anode 4 and supplies with the power source circuit of supplementary anode, it is characterized in that: supplementary anode 4 is at least one hollow steel pipes that hang on horizontal or vertical hanger 13, hollow steel pipe is furnished with outward and by the matched insulation layer 5 of steel plating inside pipe wall negative electrode, insulation layer is nylon mesh or plastics netting.Be furnished with spray hole 8 on the hollow steel pipe, the fluid inlet of recycle pump 2 is connected plating bath circulation tube 3 respectively with liquid outlet, the circulation tube of liquid outlet is connected with an end of supplementary anode, the other end sealing of supplementary anode, the fluid inlet of recycle pump 2 is joined by the galvanizing flux of plating bath circulation tube 3 with plating tank 1, makes galvanizing flux can form at least one pump circulation loop at plating tank 1 with between by steel plating conduit 11 inwalls.
The diameter of the spray hole 8 on the hollow steel pipe is 2-4 millimeters.On the hollow steel pipe cross section, adjacent spray hole to the angle in axle center is 120 °.Spray hole 8 on the hollow steel pipe is far away more from recycle pump 2 liquid outlets, and pitch of holes is more little.
Fig. 4 is embodiment one common rectifier distribution schematic diagram;
Fig. 5 is the two dc rectifier distribution schematic diagrams of the machine of embodiment two;
Fig. 6 is the independent rectifier distribution schematic diagrams of two of embodiment three, and a rectifier is main converter 12 specialize in the usefulness of hanging the anode of zinc ingot metal in the coating bath, and another is secondary rectifier 9, specializes in the usefulness of impressed current anode 4.
Shown in Fig. 4,5,6, the power circuit of supplying with impressed current anode is the adjustable DC anode circuit.
Power circuit is in series with rectifier 9 or is connected with rectifier 9 and variable resistor 10 at the impressed current anode two ends, In the circuit voltmeter, ammeter and shunt resistance can also be set.
This supplementary anode spray-plating zinc solution electroplating steel pipe inner wall technology, its processing method is:
(1). the hollow steel pipe supplementary anode is inserted by in the plating tubular workpieces insulation layer of packing into betwixt;
(2). galvanizing flux is being plated on the tubular workpieces inwall by the recycle pump forcing to deposit by circulation loop;
(3). according to the requirement to steel conduit inside and outside wall coating different ratios thickness, determine the pressure and the flow of recycle pump supply galvanizing flux, interior wall coating requires thick more, and deposition zinc speed is fast more, and recycle pump fluid inlet gate leaves greatly more, increased pressure, flow strengthens; Otherwise gate is turned down, and pressure reduces, and flow reduces;
(4). regulate the rectifier in the supplementary anode power source circuit, make electric current become adjustable direct current anode;
(5). when plating piece inwall generation two ends zinc coating is inconsistent,, voltage, electric current are changed by regulating placed in-line variable resistor in main anode and the supplementary anode power source circuit; The tubular workpieces inwall requires thick more, and the voltage of supplementary anode should increase, and electric current should strengthen.
Claims (10)
1, a kind of supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment, comprise plating tank, negative electrode, main anode, the power source circuit of supplementary anode and supply supplementary anode, it is characterized in that: supplementary anode is an at least one hollow steel pipe that hangs on the negative electrode, be furnished with in the hollow steel pipe with by the matched insulation layer of steel plating inside pipe wall negative electrode, be furnished with spray hole on the hollow steel pipe, the fluid inlet of recycle pump is connected the plating bath circulation tube respectively with liquid outlet, the circulation tube of liquid outlet is connected with an end of supplementary anode, the other end sealing of supplementary anode, the fluid inlet of recycle pump is joined by the galvanizing flux of plating bath circulation tube and plating tank, makes galvanizing flux can form a pump circulation loop at plating tank with between by the steel plating pipe inner wall.
2, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 1, it is characterized in that: the spray hole diameter on the described hollow steel pipe is the 2-4 millimeter.
3, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 1 is characterized in that: described on the hollow steel pipe cross section, adjacent spray hole to the angle in axle center is 90～120 °.
4, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 1, it is characterized in that: the spray hole on the described hollow steel pipe is far away more from the recycle pump fluid inlet, and spacing is more little.
5, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 1, it is characterized in that: described insulation layer is nylon mesh or plastics netting.
6, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 1 is characterized in that: described hanger is a hanger laterally or longitudinally.
7, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 1, it is characterized in that: the power source circuit of described supply supplementary anode is adjustable direct current plate circuit.
8, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 7, it is characterized in that: described power source circuit is in series with rectifier at the supplementary anode two ends.
9, supplementary anode spray-plating zinc solution electroplating steel pipe inner wall equipment according to claim 7, it is characterized in that: described power source circuit is connected with rectifier and variable resistor at the supplementary anode two ends.
10, a kind of supplementary anode spray-plating zinc solution electroplating steel pipe inner wall technology, its processing method is:
(1). the hollow steel pipe supplementary anode is inserted by in the plating tubular workpieces insulation layer of packing into betwixt;
(2). galvanizing flux is being plated on the tubular workpieces inwall by the recycle pump forcing to deposit by circulation loop;
(3). according to the requirement to steel conduit inside and outside wall zinc coating different ratios thickness, determine the pressure and the flow of recycle pump supply galvanizing flux, the inwall zinc coating requires thick more, deposition zinc speed is fast more, the fluid inlet gate of recycle pump is opened greatly more, makes increased pressure, and flow strengthens; Otherwise gate is turned down, and pressure reduces, and flow reduces;
(4). by regulating the rectifier in the supplementary anode power source circuit, make this circuit become adjustable direct current anode;
(5). when plating piece inwall generation two ends zinc coating is inconsistent,, voltage, electric current are changed by regulating placed in-line variable resistor in main anode and the supplementary anode power source circuit; The tubular workpieces inwall requires thick more, and the voltage of supplementary anode should increase, and electric current should strengthen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001005944A CN1138022C (en) | 2000-01-28 | 2000-01-28 | Equipment and technology for electroplating steel pipe inner wall by using auxiliary anode and spray-plating zinc solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001005944A CN1138022C (en) | 2000-01-28 | 2000-01-28 | Equipment and technology for electroplating steel pipe inner wall by using auxiliary anode and spray-plating zinc solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1319685A CN1319685A (en) | 2001-10-31 |
| CN1138022C true CN1138022C (en) | 2004-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB001005944A Expired - Fee Related CN1138022C (en) | 2000-01-28 | 2000-01-28 | Equipment and technology for electroplating steel pipe inner wall by using auxiliary anode and spray-plating zinc solution |
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| AT411906B (en) * | 2002-10-04 | 2004-07-26 | Miba Gleitlager Gmbh | METHOD FOR GALVANIC COATING OF A CYLINDRICAL INTERIOR SURFACE OF A WORKPIECE, SIGNIFICANTLY EXTENDING OVER A SEMI-CIRCLE |
| CN102181894B (en) * | 2011-04-02 | 2012-07-11 | 潘俊安 | Device and method for carrying out single spraying on power battery case |
| CN102321898B (en) * | 2011-08-22 | 2015-01-14 | 无锡鼎亚电子材料有限公司 | Equipment for solving problem of too small thickness of galvanized coating in in-line type light-emitting diode (LED) support cup |
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| CN102634822A (en) * | 2012-04-27 | 2012-08-15 | 工信华鑫科技有限公司 | Anode for cylindrical jet-state direct electrodeposition devices |
| CN103305885B (en) * | 2013-06-01 | 2016-06-22 | 北京工业大学 | A kind of flow-guiding type for hollow plating piece inner surface plating assists plating device and plating method |
| CN106947996B (en) * | 2017-03-09 | 2019-06-28 | 中国航发北京航空材料研究院 | A kind of Titanium Electroplating cadmium impressed current anode and its application method |
| WO2019151487A1 (en) * | 2018-02-02 | 2019-08-08 | 本田技研工業株式会社 | Surface treatment device and surface treatment method |
| CN108660502A (en) * | 2018-07-13 | 2018-10-16 | 郭立铭 | A kind of Multi-functional Electroplating anode nozzle |
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| CN110468438A (en) * | 2019-08-28 | 2019-11-19 | 佛山市顺德区捷永电器实业有限公司 | A kind of tubing electroplating device |
| CN113789552A (en) * | 2021-11-02 | 2021-12-14 | 四川英创力电子科技股份有限公司 | Device for electroplating through hole on HDI board and working method thereof |
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- 2000-01-28 CN CNB001005944A patent/CN1138022C/en not_active Expired - Fee Related
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