CN102115862A

CN102115862A - Circulating tin plating process and device

Info

Publication number: CN102115862A
Application number: CN 201010619522
Authority: CN
Inventors: 周开勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-31
Filing date: 2010-12-31
Publication date: 2011-07-06
Anticipated expiration: 2030-12-31
Also published as: CN102115862B

Abstract

The invention relates to the technical field of tin plating of copper wires, in particular to a circulating tin plating process and device. The circulating tin plating process comprises the following steps of: setting speed and stabilizing speed and tension in a tension buffer area; annealing in a high-temperature annealing area at high temperature; initially cooling in an annealing and cooling area; pre-plating tin in an inlet tin heating area; finally plating tin in an outlet tin heating area; scraping residual tin by using a tin plating mold for sizing; protecting reducing gas to deoxidize liquid tin and protecting a wire rod from being oxidized; cooling a hot plated tin wire with water; scraping water on the tin-plated wire with rubber; scraping water and possible tin beads by using a mold; drying residual water by using a drier; cooling the tin-plated wire to room temperature by using a cooling wind scoop; and rolling into a finished product, and the like. By adopting the circulating tin plating process, the product quality of the tin-plated wire is ensured, use of a soldering flux causing pollution can be avoided, noble rare earth metals are avoided or reduced, a large amount of electric energy is saved, waste of tin dross is reduced, operation is simplified and concealed danger of quality is reduced.

Description

A kind of circulating tin plating technique and device

Technical field

The present invention relates to the copper wire tin-plating technical field, relate in particular to a kind of circulating tin plating technique and device.

Background technology

Tinned wire is widely used in industry, so tinned wire production occupies larger specific gravity in electric wire production.Traditional tinned wird production process is: 1) earlier with copper cash high temperature annealing in the annealing furnace boiler tube; Cross when 2) going out the annealing furnace boiler tube in water cooling and the process water and upwards leave the water surface after the guide wheel commutation; 3) make the downward-sloping back of copper cash on copper cash, be coated with soldering flux with the cloth that is soaked with soldering flux; 4) enter the tin pot then, copper cash is inclined upwardly by downward-sloping transferring at the tin fork place near the tin pot bottom; 5) after copper cash leaves the tin face, before cooled and solidified, wipe unnecessary tin off through zinc-plated mould immediately, make zinc-plated thickness reach requirement; 6) enter traction wheel after the air cooling through a segment distance; 7) again through coating guide shaft oil, to scrape tin sweat(ing), wipe operations such as tin ash rolling to be finished product.Above technological process causes following problem: 1) Chang Yong soldering flux contains the very strong mineral acid that is corrosive, and is applied to and produces a lot of acid smog when entering the tin pot on the wire rod, and workshop condition and atmospheric environment are all brought bigger pollution; When 2) wire rod that scribbles soldering flux entered the tin pot, soldering flux and water all can take in the liquid tin, and water and liquid tin reaction generate stannic oxide, and soldering flux generates tin chloride etc. with the liquid tin reaction, caused liquid tin to pollute and wasted; 3) if there is big water gaging to be brought into liquid tin, also can produce blast when gasifying rapidly, liquid tin is spilt the tin pot, often cause accidents such as scald; 4) wire rod need turn round at tin fork place after entering liquid tin, and produces friction between the tin fork, has strengthened the drawing tension of wire rod, and wire rod is easily broken, and has seriously limited the tinned wire production rate; 5) earlier enter the tin pot again behind the wire annealing, have post bake process, and liquid tin surface big area contacts heat radiation with air, so energy consumption is bigger through overcooling.

At above every shortcoming of existing technology, known had some improved trials, but except that some undocumented improvement projects, disclosed improvement project is substantially all failed.For example: for solving the resistance problem that the tin fork brings, useful guide wheel replaces the improvement project of tin fork, but guide wheel can't guarantee flexible rotation in liquid tin, and it is also very big promptly to enable to rotate its resistance, so this scheme is failed.Again for example: be to reduce the stannic oxide tin ash on liquid tin surface, materials such as useful sawdust are sprinkled upon the improvement project on liquid tin surface, but are not also promoted because of problems such as poor effect.Again for example: for reducing the pollution of sour gas, a large amount of researchs about neutral soldering flux are arranged, occur but up to the present still there is real neutral soldering flux.

Use hydrochloric soldering flux to carry out tinned wire production and not only outside atmosphere is brought detrimentally affect, influence to workshop condition is also very big, cause the corrosion of the equipment of product in the workshop, and increased production cost, also need many experience once to cool off and the circulation of heating has increased energy consumption because of wire rod.

The tin plating technique that also has or not at present soldering flux; as Japan a kind of unexposed preferably technology is arranged; wire rod does not leave the annealing furnace boiler tube and cools off and be coated with operation such as soldering flux after annealing under the protection gas shiled; directly the annealing furnace boiler tube is inserted liquid tin; wire rod enters liquid tin in the annealing furnace boiler tube; in liquid tin,, through mould, saved the pollution that is coated with the soldering flux operation and brings fully when leaving liquid level through the commutation of tin fork.Domestic have enterprise to do similar trial.At the test initial stage, the tinned wire quality is fine in new liquid tin uses two day time, but the tinned wire surface pin hole shape occurs and reveals copper two days later, can't guarantee zinc-plated quality for a long time.Grope through a large amount of tests,, just solve the problem that the pin hole shape reveals copper finally by in liquid tin, adding rare earth metal.But, copper can appear revealing again soon behind the interpolation rare earth metal, need constantly to add rare earth metal, could keep zinc-plated quality, so the benefit of bringing without soldering flux has been offset in the cost raising that rare earth metal brings.The way of Japan factory is unexposed, may also be constantly to add rare earth metal, also may be to have added other more suitably material, but its technical process is identical.

Though known no soldering flux tin plating technique has solved pollution problem, but: when 1) wire rod will directly enter the tin pot from the annealing boiler tube that the protection gas shiled is arranged, because of the necessary turnover titanium alloy tube of socket of manipulation require, the upset of titanium alloy tube needs bigger operating space to cause producing a number minimizing, greatly reduces production efficiency; 2) for solving the problem that the pin hole shape reveals copper, have to regularly add reductors such as rare earth metal, cause cost too high; Therefore can not be promoted well.

Though the zinc-plated production test of no soldering flux that domestic enterprise's initial stage carries out is because of unsustainable problem failure, the tinned wire that new liquid tin was produced in two days is not reveal the copper phenomenon, and zinc-plated quality is good, can be used as the starting point of the better tin plating technique of research and development.In two days production, liquid tin does not contact other materials beyond copper removal and the air, and the dew copper phenomenon of Chu Xianing should to contact the variation of copper and air generation relevant with liquid tin two days later.

Liquid tin contacts the variation that takes place with copper, according to copper-Xi phasor, the fusing point of copper is much higher than tin, and its alloy liquid phase line temperature also presents cupric Gao Zhegao, trend that the high person of stanniferous is low generally.In the side near pure tin, copper content is that 1.3% o'clock liquidus temperature is minimum---227 degree, and a little less than 231.9681 degree of pure tin.Copper content is higher than at 1.3% o'clock, and the high more liquidus temperature of copper content is high more, and copper content reaches 13.3% o'clock liquidus temperature and reaches 415 degree.That is to say that copper content is that a flex point appears in 1.3% o'clock liquidus temperature, this flex point means that adopting the limit of separating out precipitator method purification tin is 1.3% copper content.Domestic tinned wire production plant often uses separates out the precipitator method and comes the copper content of tin is safeguarded, by above analysis as can be known the limit of its maintenance be that copper content is maintained about 1.3%.No matter have or not soldering flux to participate in, good zinc-plated must be that interatomic combination has taken place for copper and tin, the copper that fusing point is high will be to the liquid tin fusion that is lower than its fusing point, prerequisite also is interatomic combination.The effect that generally believes soldering flux mainly contains two: the zone of oxidation of 1) removing copper line surface; 2) improve wetting property between copper cash and the liquid tin, also promptly under the third party's effect, promote their interatomic combinations.In the zinc-plated production test of aforementioned no soldering flux, in two days and what difference arranged two days later? the gas shield of protection gas and the wire quality that enters annealing furnace of annealing furnace all are identical, so the zone of oxidation situation of copper line surface difference can not occur.Possible difference should be that variation has taken place the wetting property between copper cash and the liquid tin, i.e. both interatomic combinations have been subjected to obstruction, or have lost power.The copper content of pure liquid tin approaches zero, depends on the liquid tin temperature apart from the poor at least 1.3%(of saturated copper content), so have the power of stronger fusion copper.Along with the lengthening of zinc-plated production time, the copper content of liquid tin will progressively increase, if its temperature remains unchanged, copper content will be near saturated, and the power of its fusion copper will progressively reduce.So it is one of liquid tin took place two days later variation that copper content is tending towards saturated, perhaps also have other to hinder copper tin bonded factor and caused the pin hole shape to reveal copper, but it is influential certainly to copper tin bonded power, so influential to zinc-plated effect.

Liquid tin contacts the variation that takes place with air, be apparent that can produce stannic oxide floats over the liquid tin surface most.In addition, the same with all other liquid metals, also can dissolve all gases in the liquid tin, comprise airborne oxygen and nitrogen etc.The solubleness of gas in liquid tin changes along with the temperature variation of liquid tin, and temperature high-dissolvability more is high more, and temperature low solubility more is low more.Gas dissolving have or not to the speed of liquid tin and size, the interface of contact area stir and gaseous tension relevant, in contact area little and when not having special the stirring speed slower, new liquid tin to the two day time that dew copper occurs may be exactly that air is dissolved into the needed time of liquid tin more fully.Small bubbles will be separated out and form to the gas that is dissolved in the liquid tin when the liquid tin temperature descends, small bubbles can move up and leave liquid tin under buoyancy, and the bubble that does not also leave when liquid tin solidifies will form pore in solid-state tin.Supposing that liquid tin contacts with air has dissolved gases such as approaching saturated oxygen and nitrogen two days later, this liquid tin has entered and has inserted in the annealing furnace boiler tube of liquid tin, liquid tin liquid level in the annealing furnace boiler tube and tin pot liquid level maintain an equal level, and are positioned at the liquid tin and relative isolation of tin pot liquid tin of annealing furnace boiler tube below the liquid level.In intraluminal fluid attitude tin and the pot external conditions of liquid tin have 2 different: 1) contact of intraluminal fluid attitude tin surfaces is protection gas and nitrogen, and pressure is a little more than barometric point, and the contact of liquid tin surface is air in the pot, and pressure equals barometric point; 2) temperature of intraluminal fluid attitude tin is subjected to entering the copper cash Temperature Influence of liquid tin, may be higher or lower than a pot interior liquid tin.Intraluminal fluid attitude tin contains oxygen and do not have at liquid level under the situation of oxygen separates out possibly, but mainly is that separate out on the surface under the bigger situation of gaseous tension, little in the possibility that the inner forming core of liquid tin produces bubble.But, be lower than the liquid tin temperature if enter the copper cash temperature of liquid tin, there is this problem in domestic enterprise during test probably, makes intraluminal fluid attitude Xi Wendu reduction and is lower than a pot interior liquid tin temperature, and the liquid tin temperature is issued to saturated dissolved oxygen and will separates out and form oxygen bubble in pot so.If oxygen bubble touches copper line surface, will form oxidation spots in copper line surface, cause the part not plate tin, show as the pin hole shape and reveal copper.When or soon this problem occurring, if add rare earth metal in liquid tin, rare earth metal possesses very strong deoxygenation function, can reduce the dissolved oxygen content in the liquid tin greatly, reveals copper so can eliminate the pin hole shape.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, a kind of circulating tin plating technique is provided, this technology is in the quality product that guarantees tinned wire, also can avoid using the soldering flux that pollutes, avoid or reduce and use valuable rare earth metal, a large amount of saves energy reduce the scruff waste, simplify the operation, reduce hidden danger of quality.

Another object of the present invention is at the deficiencies in the prior art, a kind of circulating tinning stack is provided, this device is in the quality product that guarantees tinned wire, also can avoid using the soldering flux that pollutes, avoid or reduce and use valuable rare earth metal, a large amount of saves energy reduce the scruff waste, simplify the operation, reduce hidden danger of quality.

For achieving the above object, the present invention is achieved through the following technical solutions:

A kind of circulating tin plating technique, it may further comprise the steps:

Step 1, the import of copper cash self-annealing stove boiler tube enters in the downward-sloping annealing furnace boiler tube, carries out high temperature annealing in the high temperature annealing district of annealing furnace boiler tube; The liquid tin self-storing mechanism pumps into the annealing furnace boiler tube near outlet one end, and described storing unit liquid level is lower than the outlet of annealing furnace boiler tube;

Step 2, copper cash enter the annealing cooling zone of annealing furnace boiler tube and tentatively cool off, but still make the temperature of copper cash be higher than the temperature of the liquid tin that pumps into the annealing furnace boiler tube;

Step 3, copper cash contact liquid tin and the tin heating zone of advancing that enters the annealing furnace boiler tube is carried out zinc-plated in advance, the oxygen level of advancing the liquid tin in the tin heating zone is in undersaturated condition all the time, enters the tin heating zone and is heated to and avoids the bubble that produces oxygen, and make the preliminary bonded temperature of copper tin atom;

Step 4, copper cash arrive and promptly to enter out the tin heating zone after the import of circulation tin and carry out finally zinc-platedly, go out to be full of mobile liquid tin in the tin heating zone, and liquid tin are heated to the temperature that copper content and dissolved oxygen amount all are in undersaturated condition in going out the tin heating zone;

Step 5 after the copper cash after zinc-plated leaves from the outlet of annealing furnace boiler tube, enters zinc-plated mould, and the liquid tin of the ot-yet-hardened that zinc-plated mould adheres to copper line surface carries out tin scraping to be handled, and meets the requirements of tinned wire thereby form diameter; Liquid tin after zinc-plated flows out and is collected in described storing unit from the outlet of annealing furnace boiler tube, and is pumped into the annealing furnace boiler tube once more and realize circulating via storing unit;

At storing unit, and annealing cooling zone and enter the tin heating zone and charged into the protection reducing gas, to reduce the oxidation of copper cash and liquid tin;

Step 6, tinned wire are carried out cooling drying after zinc-plated mould outlet leaves, and rolling is a finished product.

Further, also comprised step 1a before described step 1: copper cash is after tension adjustment, and inlet wire speed and tension stability enter the annealing furnace boiler tube again.

Further, in described step 3 and the step 4,, the rare earth metal or the phosphorus of deoxygenation function can in liquid tin, have been added, to reduce the oxygen level of liquid tin if the too high tinned wire that causes of liquid tin oxygen level has the copper of revealing phenomenon.

It comprises constant speed and snubber assembly, is arranged in the intravital annealing furnace boiler tube of annealing furnace stove, be communicated with the annealing furnace boiler tube and can feed the boiler tube joint of shielding gas, the annealing furnace boiler tube from import to the downward-sloping setting of Way out; It also comprises the liquid tin recycle system, the shielding gas recycle system, water cooling plant, drying unit and cooling wind scoop; Be disposed with high temperature annealing district, annealing cooling zone, enter the tin heating zone and go out the tin heating zone along the annealing furnace boiler tube from import, to enter the tin heating zone and go out the tin heating zone be zinc-plated boiler tube to described annealing furnace boiler tube described, described zinc-plated boiler tube outlet is socketed with zinc-plated mould, and described zinc-plated mould offers and makes the effusive return flow line of liquid tin; The high temperature annealing district is arranged at import one side near the annealing furnace boiler tube, and described boiler tube joint is arranged at described annealing cooling zone and advances between the tin heating zone, describedly enters the tin heating zone and goes out the tin heating zone and offer the import of circulation tin;

Describedly enter the tin heating zone between boiler tube joint and the import of circulation tin, describedly go out the tin heating zone between import of circulation tin and zinc-plated mould, describedly advance tin heating zone periphery and go out tin heating zone periphery to be provided with heating unit; Liquid tin liquid level in advancing the zinc-plated boiler tube of tin heating zone is not higher than the boiler tube joint;

The described liquid tin recycle system comprises tin recycle pump, tin divider, returns molten tin bath and Chu Xixiang, and time molten tin bath is positioned at annealing furnace boiler tube below and is communicated with the return flow line of described zinc-plated mould, and storage tin case is positioned at go back to the molten tin bath below; Described time molten tin bath comprises the outer time molten tin bath that is communicated with described return flow line, and the interior time molten tin bath that is communicated with described storage tin case; The tin recycle pump is arranged in the storage tin case, and described tin divider is arranged at the position of the corresponding described circulation tin import of zinc-plated boiler tube, and described tin divider is communicated with described tin recycle pump;

The described shielding gas recycle system comprises shielding gas source of the gas storing unit, be opened in the protection gas intake that returns molten tin bath one end in described, return in connecting the molten tin bath the other end and tin divider one end protection gas passage, is connected the tin divider the other end with the pipeline of protecting the gas divider, be connected the flexible pipe of protecting gas divider and boiler tube joint; Described annealing furnace boiler tube import envelope is provided with tightness system.

Described tin divider comprises into Xi Qu, tin distribution zone and flooded zonevvv; Advance between Xi Qu and the tin distribution zone to be provided with dividing plate, described dividing plate evenly is arranged at intervals with aperture, is provided with overflow plate between tin distribution zone and the flooded zonevvv; The liquid tin that enters flooded zonevvv is by the overflow ducts parallel with the annealing furnace boiler tube, and overflow spout vertically downward flows to storage tin case bottom, and described overflow ducts is arranged in the corresponding described position that goes out the tin heating zone.

Wherein, described tin distribution zone is provided with the plug rod guidance pipe that passes the tin divider up and down, plug rod guidance pipe lower vertical is connected in zinc-plated boiler tube, and interconnect with zinc-plated boiler tube, plug rod guidance pipe bottom endoporus is provided with the poroid plug sealing seam of step, on the plug rod guidance tube wall that is higher than plug sealing seam, offer into tin side opening, describedly advance the tin side opening and be opened in below the liquid tin liquid level that overflow plate limits; Slip cap is provided with the plug bar in the described plug rod guidance pipe, and described plug bar lower end and described plug sealing seam are complementary; Plug bar upper end is connected with and drives the operation handle arm that described plug bar slides up and down.

Wherein, described tin recycle pump comprises spirrillum centrifugal pump housing, centrifugal pump impeller, impeller pump axle sleeve, centrifugal pump shaft bearing and driving motor; Wherein the spirrillum centrifugal pump housing is fixed on storage tin case bottom, and spiral outlet is by entering the tin-tube road and parallel with the annealing furnace boiler tube advance the tin passage and advance Xi Qu with the tin divider and be communicated with vertically upward, describedly advances the tin passage and is arranged at out in the tin heating zone; The centrifugal pump housing at spirrillum centrifugal pump housing top lid is the circular centrifugal pump housing lid of opening diameter greater than the centrifugal pump impeller diameter, the annulus endoporus of centrifugal pump housing lid greater than corresponding axostylus axostyle external diameter to form tin inlet; Be evenly equipped with the blade of centrifugal pump impeller between top end cap and the lower end cap along annulus; Impeller pump axle sleeve bottom is communicated with storage tin case; Described storage tin case periphery also is provided with described heating unit.

Wherein, described zinc-plated mould comprises that an end is socketed in the zinc-plated die sleeve in the exit of annealing furnace boiler tube, the other end of described zinc-plated die sleeve is socketed on a zinc-plated mould bases, described zinc-plated mould bases is fixed with a zinc-plated mould, described zinc-plated mould bases offers the tapered hole that runs through described zinc-plated mould bases over against the position of zinc-plated mould core rod, and described tapered hole front end has extended one and gone out the tin hole; Make the aperture go out the tin hole by what annealing furnace boiler tube aperture narrowed down to smaller aperture due; Form downward described return flow line between zinc-plated mould bases and the zinc-plated mould; Described return flow line connects zinc-plated mould import and goes back to the molten tin bath bottom; The side's of the being bar shaped of zinc-plated mould, the middle part is equipped with the diamond core rod, one side of core rod is import, opposite side is outlet, have described return flow line under import one side direction, the tin aperture is aimed at out in zinc-plated mould import when inserting zinc-plated mould bases, forms airtight passage between downward return flow line and the zinc-plated mould bases and is connected zinc-plated mould import and goes back to the molten tin bath bottom.

Wherein, described time molten tin bath comprises outer molten tin bath, interior time molten tin bath and the overflow groove of returning, and returns in described molten tin bath thermopair and time molten tin bath electrothermal tube are installed back in the molten tin bath; Be provided with over-pass between overflow groove and interior time molten tin bath; In return molten tin bath and the overflow groove airtight cavity that exists together, an end of this airtight cavity is provided with protection gas access port, the other end is provided with protection gas connecting passage and makes the overflow ducts of protection air-flow to the tin divider.

Wherein, described heating unit comprises heat-conducting layer, and described heat-conducting layer is inserted with thermopair, and described heat-conducting layer periphery is provided with stranded resistance wire electro-heat equipment.

Preferably; protection gas of the present invention is selected hydrogen for use; described protection gas source of the gas storing unit is the ammonia decomposition device of peripheral hardware, and the shared ammonia of the bare copper wire shielding gas of this ammonia decomposition device generation and annealing boiler tube decomposes plug rod guidance pipe lower vertical and is connected in zinc-plated boiler tube and nitrogen.

Wherein, described water cooling plant comprises cyclic water tank, recycle pump, tank, return flume, water receiving tank, dash rubber, and scrapes the glue skin or scrape the tin sweat(ing) mould; Described return flume and outer returning between the molten tin bath are provided with heat insulation boss, be provided with over-pass between return flume and the tank, dividing plate offers cable-through hole between tank and the water receiving tank, dash rubber is clamped at and stops the water in the tank to flow to water receiving tank in a large number on the cable-through hole, is provided with in the water receiving tank and scrapes the glue skin or scrape the tin sweat(ing) mould; The return flume bottom is provided with the water return outlet that is communicated with cyclic water tank, and water return outlet is provided with plug; Tank top also offers high-order water return outlet and is communicated with cyclic water tank.

Wherein, described drying unit comprises oven dry boiler tube, oven dry heat-conducting layer, resistive heater, thermopair, insulating cotton, air channel and blower fan; The oven dry boiler tube offers intake opening near exit end, and intake opening is arranged in the air channel.

A kind of circulating tin plating technique of the present invention; when guaranteeing quality product; can avoid using the soldering flux that pollutes; also can avoid or reduce the valuable rare earth metal of use; because of having reduced also saves energy in a large number of a cooling and heating cycle; because of protecting gas shiled dynamically reduction-oxidation tin and the dynamic liquid tin dissolved oxygen amount that reduces; reduce the scruff waste; also because of having reduced in the changed course downwards of a wire rod; commutation turnover under upwards altering course again; and width scatters, and distance between centers of tracks becomes big requirement in the tin pot to adapt to; thereby simplified drawing lines, when simplifying the operation, also reduced the hidden danger of quality that brings because of the drawing lines complexity.

A kind of circulating tinning stack of the present invention; when guaranteeing quality product; can avoid using the soldering flux that pollutes; also can avoid or reduce the valuable rare earth metal of use; because of having reduced also saves energy in a large number of a cooling and heating cycle; because of protecting gas shiled dynamically reduction-oxidation tin and the dynamic liquid tin dissolved oxygen amount that reduces; reduce the scruff waste; also because of having reduced in the changed course downwards of a wire rod; commutation turnover under upwards altering course again; and width scatters, and distance between centers of tracks becomes big requirement in the tin pot to adapt to; thereby simplified drawing lines, when simplifying the operation, also reduced the hidden danger of quality that brings because of the drawing lines complexity.

Description of drawings

Fig. 1 is the structural representation of a kind of circulating tinning stack of the present invention.

Fig. 2 is the constant speed of a kind of circulating tinning stack of the present invention and the structural representation of snubber assembly.

Fig. 3 is the structural representation of the tin divider of a kind of circulating tinning stack of the present invention, originally illustrates the tin divider and is in closing condition.

Fig. 4 is in the structural representation of opened condition for the tin divider of a kind of circulating tinning stack of the present invention.

Fig. 5 is the structural representation of the tin recycle pump of a kind of circulating tinning stack of the present invention.

Fig. 6 is the structural representation that returns molten tin bath and zinc-plated mould of a circulating tinning stack of the present invention.

Fig. 7 is the tin circulation synoptic diagram of a kind of circulating tinning stack of the present invention.

Fig. 8 is the shielding gas circulation synoptic diagram of a kind of circulating tinning stack of the present invention.

Embodiment

The present invention is further illustrated below in conjunction with drawings and Examples.

Embodiment one

A kind of circulating tin plating technique, it may further comprise the steps:

At storing unit, and annealing cooling zone and enter the tin heating zone and charged into the protection reducing gas, to reduce the oxidation of copper cash and liquid tin; Owing to charged into the protection reducing gas in aforementioned region, as hydrogen, then liquid tin fully contacts with protection gas in the process of circulating, and can effectively reduce the dissolved oxygen amount in the liquid tin, and reduction stannic oxide wherein, keeps liquid tin to be in better state for a long time;

Step 6, tinned wire are carried out cooling drying after zinc-plated mould outlet leaves, and rolling is a finished product.Particularly, tinned wire enters water cooling plant and carries out water cooling in short range; Enter behind the tinned wire leaving water device for cooling and scrape the glue skin and strike off surface attachment water; Tinned wire enters scrapes the tin sweat(ing) that the tin sweat(ing) mould struck off or detected the existence of tinned wire surface, simultaneously scraped surface attachment water; The tinned wire plating is carried out the surface water oven dry through drying unit; It is finished product that tinned wire is carried out rolling after cooling through the cooling wind scoop.

Further, also comprised step 1a before described step 1: copper cash is after tension adjustment, and inlet wire speed and tension stability enter the annealing furnace boiler tube again.Enter the annealing furnace boiler tube behind copper cash speed and the tension stability again and can prevent effectively that copper cash from shaking in boiler tube, thereby alleviate the surface imperfection that shake causes.

Further, in described step 3 and the step 4,, the rare earth metal or the phosphorus of deoxygenation function can in liquid tin, have been added, to reduce the oxygen level of liquid tin if the too high tinned wire that causes of liquid tin oxygen level has the copper of revealing phenomenon.Certainly, can improve suitably also into that the tin Heating Zone Temperature stops this zone precipitated oxygen bubble, finish pre-zinc-plated after, even have oxygen bubble also can not form the oxidation spots of not plating tin going out the tin heating zone in copper line surface.

In sum, above-mentioned a kind of circulating tin plating technique, comprise the high temperature annealing district carry out high temperature annealing, annealing cooling zone tentatively cool off, advance the tin heating zone carry out zinc-plated in advance, go out the tin heating zone and carry out finally zinc-plated, zinc-plated mould and strike off surplus tin and carry out sizing, water cooling hot dip tinning line, rubber and strike off water, mould on the tinned wire and scrape and dewater and possible tin sweat(ing), drying unit dried surplus water, cooling wind scoop cooling tinned wire to the room temperature operation.

Compare with traditional tin plating technique, the liquid tin that environmental pollution, oxidation and the chlorination that the inorganic acid gas that above-mentioned a kind of circulating tin plating technique has obviously avoided traditional tin plating technique to exist brings brings pollutes and waste, and the defectives such as scald brought of the fried tin of water vapour, reached the same effect of known no soldering flux tin plating technique.And the present invention finishes zinc-plated back straight line and enters zinc-plated mould in pipe, need not turn round through the tin fork in the tin pot; Wire temperature carries out during a little more than the liquid tin temperature zinc-plated, no second-heating, and liquid tin to expose radiating surface less.

Simultaneously, because described zinc-plated boiler tube does not need upset, so tube spacing can be very little, producing a number can be a lot, helps to enhance productivity.In addition; because this circulating tin plating technique neither uses soldering flux; do not add reductors such as rare earth yet; the material that liquid tin in use touches has just had only copper, air and protection gas; wherein the dissolved oxygen and the deoxidation meeting of air and protection gas reach balance, and unique behind the life-time service has been exactly copper at the content that increases.Liquid tin has certain work-ing life using under the traditional technology of soldering flux, and the major cause of scrapping is that wherein copper content and other foreign matter content is too high.If have only problem of copper content, can also can adopt simple method to refine by improving the degree of unsaturation that zinc-plated temperature keeps copper content, or dilution, needn't scrap, can save cost greatly.

Above-mentioned a kind of circulating tin plating technique also can be realized and perfectly the combining of bare copper wire technology, make same equipment can take into account the requirement of production tinned wire and two kinds of functions of bare copper wire preferably, tradition tinned wire arts demand increases a tin pot in the bare copper wire technical process, the tin pot has not only influenced technical process at length direction, the requirement that its distance between centers of tracks strengthens also forces drawing lines to change at width, and it is complicated to be that technical process becomes.When above-mentioned a kind of circulating tin plating technique is produced bare copper wire on same equipment, only need stop the tin that circulates, the water of cooling trough changed into contain the antioxidant aqueous solution, and water level brought up to can enter in the annealing furnace boiler tube arrive the position that circulation tin has arrived, or feed shielding gas and stop the heating of zinc-plated district to the annealing furnace boiler tube by the shielding gas divider; Or start separately to advance the heating of tin heating zone and protect bare copper wire not oxidized to produce steam, stop the heating of tin heating zone; Can carry out bare copper wire production by identical drawing lines.All can be under two kinds of functions by optimal technical process and drawing lines are produced separately.

Embodiment two

Extremely shown in Figure 8 as Fig. 1, a kind of device of implementing a kind of circulating tin plating technique of the present invention, it comprises constant speed and snubber assembly 1, be arranged in the intravital annealing furnace boiler tube 2 of annealing furnace stove, be communicated with annealing furnace boiler tube 2 and can feed the boiler tube joint 21 of shielding gas, annealing furnace boiler tube 2 from import to the downward-sloping setting of Way out; It also comprises the liquid tin recycle system, the shielding gas recycle system, water cooling plant 5, drying unit 6 and cooling wind scoop 7; Be disposed with high temperature annealing district 22, annealing cooling zone 23, enter tin heating zone 241 and go out tin heating zone 242 along annealing furnace boiler tube 2 from import, described annealing furnace boiler tube 2 enters tin heating zone 241 and goes out tin heating zone 242 to be zinc-plated boiler tube 24 described, described zinc-plated boiler tube 24 outlets are socketed with zinc-plated mould 8, and described zinc-plated mould 8 offers and makes the effusive return flow line 81 of liquid tin; High temperature annealing district 22 is arranged at import one side near annealing furnace boiler tube 2, and described boiler tube joint 21 is arranged at described annealing cooling zone 23 and advances between the tin heating zone 241, describedly enters tin heating zone 241 and goes out tin heating zone 242 and offer circulation tin import 25; Wherein, boiler tube joint 21 places do not have the insulating cotton parcel, can connect protection gas divider 43 and will protect gas to introduce the above zinc-plated boiler tube 24 of tin liquor face in the annealing furnace boiler tube 2.

See shown in Figure 2, particularly, described constant speed and snubber assembly 1 comprise buffering wheel 11 and constant speed wheel 12, described buffering wheel 11 is articulated in frame by a turntable 13, buffering wheel 11 is articulated in this turntable 13, and described buffering wheel 11 can be adjusted the position around the hinge through of described turntable 13 according to tension force and linear speed size in the line sending process.Tension force was inhomogeneous when copper cash was emitted from the wire drawing take-up reel, be easy to generate shake during the operation of high speed large span, annealing furnace boiler tube 2 endoporus are not only long but also little, easy and boiler tube tube wall bump generation spot when shaking by the copper cash of annealing furnace boiler tube 2, the infringement product surface quality becomes outstanding problem especially when high-speed production.Constant speed of the present invention and snubber assembly 1, the line sending tension fluctuation during to peak value buffering wheel 11 be lifted and drawing lines is shortened and reduce its tension force, the line sending tension fluctuation during to valley buffering wheel 11 hang down and make drawing lines elongated and promote its tension force, thereby make the wire tension fluctuation that arrives constant speed wheel 12 less, guaranteeing that wire rod is wrapped in sustainedly and stably on the constant speed wheel 12 discontinuity does not take place and skids, and wire rod and constant speed take turns 12 can produce bigger frictional force after continual and steady the contact arranged; Bigger frictional force can guarantee: 1) constant speed is taken turns the tension force of 12 ends of incoming cables and speed is unstable by isolated, can not be transmitted to constant speed and take turns 12 leading-out terminals and enter annealing furnace boiler tube 2 wire rod is shaken in boiler tube; 2) come to arrive constant speed by take-up motor biography and take turns the drawing tension of 12 leading-out terminals also by isolated, can not be transmitted to constant speed takes turns 12 ends of incoming cables and draws the express delivery linear velocity, actual production speed is limited by constant speed wheel 12, do not regulated the influence of take-up motor tractive force size, guaranteed that production technique is not subjected to the influence of manual operation deviation; Isolated the tension fluctuation that unwrapping wire brings effectively, make wire rod in annealing furnace boiler tube 2, do not produce the shake and injure.

As shown in Figure 1, present embodiment is described to enter tin heating zone 241 between boiler tube joint 21 and circulation tin import 25, describedly go out tin heating zone 242 between circulation tin import 25 and zinc-plated mould 8, describedly advance tin heating zone 241 peripheries and go out tin heating zone 242 peripheries to be provided with heating unit; Liquid tin liquid level in advancing the zinc-plated boiler tube 24 of tin heating zone 241 is not higher than boiler tube joint 21.

As shown in Figure 7, the described liquid tin recycle system of present embodiment comprises tin recycle pump 31, tin divider 32, returns molten tin bath 33 and storage tin case 34, and time molten tin bath 33 is positioned at annealing furnace boiler tube 2 belows and is communicated with described return flow line 81, and storage tin case 34 is positioned at go back to molten tin bath 33 belows; Described time molten tin bath 33 comprises the outer time molten tin bath 331 that is communicated with described return flow line 81, and the interior time molten tin bath 332 that is communicated with described storage tin case 34; Tin recycle pump 31 is arranged in the storage tin case 34, and described tin divider 32 is arranged at the position of zinc-plated boiler tube 24 corresponding described circulation tin imports 25, and described tin divider 32 is communicated with described tin recycle pump 31; The storage tin case 34 interior liquid tins that described tin recycle pump 31 will be in extreme lower position are depressed into the tin divider 32 that is in the extreme higher position, liquid tin in the tin divider 32 or directly overflow to storage tin case 34, or flow into back molten tin bath 33 through zinc-plated boiler tube 24 and zinc-plated mould, the liquid tin that returns in the molten tin bath 33 overflows to storage tin case 34 again, liquid tin all keeps a fixedly liquid level in tin divider 32 reaches back molten tin bath 33, be kept above the liquid level of tin recycle pump 31 suction port place minimum liquid levels in storage tin case 34 domestic demands, need add new tin during near minimum liquid level, the difference of the highest liquid level and minimum liquid level should be greater than the tin consumption of a class.

As shown in Figure 8, the described shielding gas recycle system comprise shielding gas source of the gas storing unit, be opened in the protection gas intake 41 that returns molten tin bath 332 1 ends in described, return in connecting molten tin bath 332 the other ends and tin divider 32 1 ends protection gas passage 42, is connected tin divider 32 the other ends with the pipeline of protecting gas divider 43, be connected the flexible pipe 44 of protecting gas divider 43 and boiler tube joint 21; Described annealing furnace boiler tube 2 imports envelope is provided with tightness system.Particularly, described tightness system can be porcelain bead hole or the seal gum plug that is arranged at 2 imports of annealing furnace boiler tube; Less porcelain bead hole, aperture can be reduced protection gas and overflowed, and the seal gum plug can stop protection gas to overflow but inconvenient operation fully; Protection gas divider 43 should have big volume; and the aperture that is connected with boiler tube joint 21 should be less; time protection gas overflows along zinc-plated boiler tube 24 outlets in order to avoid the liquid tin in a certain zinc-plated boiler tube 24 is by emptying; cause protecting and protect atmospheric pressure decline too fast in the gas divider 43, too influence the protection atmospheric pressure in other zinc-plated boiler tube 24 and the annealing furnace boiler tube 2.

Wherein, the described heating unit of present embodiment comprises heat-conducting layer, and described heat-conducting layer is inserted with thermopair, and described heat-conducting layer periphery is provided with stranded resistance wire electro-heat equipment.

Preferably; protection gas of the present invention is selected hydrogen for use; described protection gas source of the gas storing unit is the ammonia decomposition device of peripheral hardware; this ammonia decomposition device produces ammonia decomposition hydrogen and the nitrogen shared with the bare copper wire shielding gas of annealing furnace boiler tube 2; lead to annealing furnace boiler tube 2 behind interior time molten tin bath 332 of process and the tin divider 32; in interior time molten tin bath 332 and tin divider 32 with after the combination with oxygen, can produce a small amount of water vapor; the total tolerance that enters annealing furnace boiler tube 2 can not reduce; and can not influence protection effect, so can not bring cost to increase to bare copper wire.In interior time molten tin bath 332 and tin divider 32, but protection gas also might reduce partial oxidation tin and tin protoxide except that liquid towards tin carries out deoxidation.Below 600 degrees centigrade, the free energy of water molecules is a little more than the free energy of stannic oxide and tin protoxide, so pure tin can be captured oxygen formation stannic oxide and protection gas from water molecules fast under about 250 degrees centigrade zinc-plated temperature.But when protection gas concentration is far longer than water molecules concentration, lost the environment of oxidizing reaction, also reverse reduction reaction may take place when free energy difference is little, the possibility to the higher tin protoxide generation reduction reaction of free energy is bigger especially.

As shown in Figure 3, Figure 4, the described tin divider 32 of present embodiment comprises into tin district 321, tin distribution zone 322 and flooded zonevvv 323; Advance between tin district 321 and the tin distribution zone 322 to be provided with dividing plate 324, described dividing plate 324 evenly is arranged at intervals with aperture, is provided with overflow plate 325 between tin distribution zone 322 and the flooded zonevvv 323; The liquid tin that enters flooded zonevvv 323 is by the overflow ducts parallel with the annealing furnace boiler tube 326, and overflow spout vertically downward 327 flows to storage tin case bottom, and described overflow ducts 326 is arranged in the corresponding described position that goes out tin heating zone 242.

Wherein, described tin distribution zone 322 is provided with the plug rod guidance pipe 9 that passes tin divider 32 up and down, plug rod guidance pipe 9 lower vertical are connected in zinc-plated boiler tube 24, and interconnect with zinc-plated boiler tube 24, plug rod guidance pipe 9 bottom endoporus are provided with the poroid plug sealing seam 91 of step, on plug rod guidance pipe 9 tube walls that are higher than plug sealing seam 91, offer into tin side opening 92, describedly advance tin side opening 92 and be opened in below the liquid tin liquid level that overflow plate 325 limits; Slip cap is provided with plug bar 93 in the described plug rod guidance pipe 9, and described plug bar 93 lower ends and described plug sealing seam 91 are complementary; Plug bar 93 upper ends are connected with and drive the operation handle arm 94 that described plug bar 93 slides up and down.Adopt described plug rod guidance pipe 9, plug bar 93 is depressed when sealing liquid tin can not enter corresponding boiler tube, and liquid tin can flow into boiler tube and enter zinc-plated district in the pipe when plug bar 93 lifted, thereby the may command liquid tin is in the circulation of 24 in tin divider 32 and zinc-plated boiler tube.

As shown in Figure 5, described tin recycle pump 31 comprises spirrillum centrifugal pump housing 311, centrifugal pump impeller 312 and axle, impeller pump axle sleeve 313, centrifugal pump shaft bearing 314 and driving motor 315; Wherein spirrillum centrifugal pump housing 311 is welded on storage tin case 34 bottoms, spiral outlet is by entering the tin-tube road and parallel with zinc-plated boiler tube 24 advance the tin passage and enter tin district 321 with tin divider 32 and be communicated with vertically upward, the advance tin passage parallel with zinc-plated boiler tube 24 is wrapped in out in the tin heating zone 242, the centrifugal pump housing 311 lid opening diameters at spirrillum centrifugal pump housing 311 tops are greater than centrifugal pump impeller 312 diameters, centrifugal pump housing 311 covers and is welded with centrifugal pump housing 311 pull bars and is connected with impeller pump axle sleeve 313 dismounting mouths, and centrifugal pump housing 311 pull bars can guarantee to seal the seam flange and centrifugal pump housing 311 lids compress sealing; Centrifugal pump impeller 312 lower end cap are solid cake and weld with centrifugal pump shaft, impeller pump top end cap is an annulus, the annulus endoporus should form centrifugal pump impeller 312 along the uniform spiral blade that is welded with of annulus between top end cap and the lower end cap greater than corresponding axostylus axostyle external diameter to form tin inlet; Impeller pump axle sleeve 313 bottoms are provided with sealing seam flange, seam on the flange and centrifugal pump housing 311 lid endoporus closely cooperate and form sealing, prevention is communicated with storage tin case 34 greater than the high-pressure liquid tin at centrifugal pump impeller 312 diameter places, sealing seam flange diameter of bore is identical with impeller 312 top end cap diameter of bores, and form tin inlet between corresponding axostylus axostyle external diameter, sealing seam flange fuses by several flange joint pins and main bush 313 pipe flanges, gap between several flange joint pins makes the tin inlet at sealing seam flange endoporus place be communicated with storage tin case 34, liquid tin during operation in the storage tin case 34 can enter centrifugal pump impeller 312 Inner circle continuously, main bush 313 pipe flanges fuse with impeller pump axle sleeve 313 mounting flanges by main bush 313 pipes, impeller pump axle sleeve 313 mounting flanges fuse by flange joint pin and bearing support 314 joint flanges, and this flange joint pin can reduce bearing support 314 suffered temperatures involved; Bearing location main shaft in the bearing support 314 also makes main shaft rotation under belt pulley 315 drives; Described storage tin case 34 peripheries also are provided with described heating unit.

As shown in Figure 6, described zinc-plated mould 8 comprises that an end is socketed in the zinc-plated die sleeve 82 in the exit of annealing furnace boiler tube 2, the other end of described zinc-plated die sleeve 82 is socketed on a zinc-plated mould bases 83, described zinc-plated mould bases 83 is fixed with a zinc-plated mould 84, described zinc-plated mould bases 83 offers the tapered hole 831 that runs through described zinc-plated mould bases 83 over against the position of zinc-plated mould 84 core rods, and described tapered hole 831 front ends have extended one and gone out tin hole 832; Make the aperture go out tin hole 832 by what annealing furnace boiler tube 2 apertures narrowed down to smaller aperture due; Form downward described return flow line 81 between zinc-plated mould bases 83 and the zinc-plated mould 84; Described return flow line 81 connects zinc-plated mould 84 imports and goes back to molten tin bath 33 bottoms; Zinc-plated mould 84 sides of being bar shaped, the middle part is equipped with the diamond core rod, one side of core rod is import, opposite side is outlet, have described return flow line 81 under import one side direction, tin hole 832 is aimed at out in zinc-plated mould 84 imports when inserting zinc-plated mould bases 83, forms airtight passage between downward return flow line 81 and the zinc-plated mould bases 83 and is connected zinc-plated mould 84 imports and goes back to molten tin bath 33 bottoms.Described tapered hole 831 is concentrated effusive liquid tin and is aimed at zinc-plated mould 84 imports, the downward described return flow line 81 that forms between zinc-plated mould bases 83 and the zinc-plated mould 84 makes the liquid tin that impacts after zinc-plated mould 84 imports flow to go back to molten tin bath 33 bottoms fast, does not contact with air before arriving go back to molten tin bath 33 bottoms; There is screw to fix when zinc-plated die sleeve 82 and zinc-plated boiler tube 24 sockets, also there is screw to fix when zinc-plated die sleeve 82 and zinc-plated mould bases 83 sockets, zinc-plated mould 84 sides of being bar shaped, can insert the square aperture place of zinc-plated mould bases 83, the square aperture bottom of zinc-plated mould bases 83 is provided with support, and this support makes zinc-plated mould 84 imports and zinc-plated mould bases 83 stannum export centerings.The tapered hole 831 of zinc-plated mould bases 83 of the present invention and go out tin hole 832 and intraluminal fluid attitude tin is concentrated rush at die inlet, to impact the copper powder that to pile up, copper powder and scruff can not be assembled in die inlet, avoided in the prior art zinc-plated mould import often to pile up copper powder and scruff, the problem that can't remove in the production process.

Wherein, described time molten tin bath 33 comprises and returns molten tin bath 331, interior time molten tin bath 332 outward, returns molten tin bath thermopair 334, returns molten tin bath electrothermal tube 335 and overflow groove 333; Outer time molten tin bath 331 main effects are to accept from zinc-plated mould bases 83 effusive liquid tins, for the ease of operation, return molten tin bath 331 outward and are exposed in the air; Interior returning is provided with surperficial tin baffle plate 337 isolation between molten tin bath 332 and the outer time molten tin bath 331, be provided with thermopair 334 and electrothermal tube 335 in the interior time molten tin bath 332 and control back molten tin bath 33 temperature; Be provided with over-pass 336 between overflow groove 333 and interior time molten tin bath 332, return molten tin bath 332 and outer liquid level of returning molten tin bath 331 in over-pass 336 is used to control, overflow groove 333 1 ends are provided with pipeline makes the overflow liquid tin flow to storage tin case 34 bottoms; In return molten tin bath 332 and the overflow groove 333 airtight cavity that exists together, an end of this airtight cavity is provided with protection gas access port 41, the other end is provided with protection gas connecting passage 42 and makes the overflow ducts 326 of protection air-flow to tin divider 32.

In the working process, after going out liquid tins in the tin heating zone 242 and flowing out from the outlet of zinc-plated boiler tube 24, through zinc-plated die sleeve 82, zinc-plated mould bases 83 flows directly into outer go back to molten tin bath 331 bottoms that contact with air with the copper powder that the enclosed passage that zinc-plated mould 84 forms is taken zinc-plated mould 84 imports, when washing away copper powder, do not form the waterfall bigger with the air contact surface, return molten tin bath 332 in entering from surperficial tin baffle plate 337 bottom notch then, interior time molten tin bath 332 is provided with thermopair 334 and electrothermal tube 335 is controlled back molten tin bath 33 temperature, also be provided with overflow plate 325 and control back molten tin bath 33 liquid levels, returning molten tin bath 33 liquid levels should be apparently higher than surperficial tin baffle plate 337 bottom notch, the liquid tin of crossing overflow plate 325 enters overflow groove 333, one end of overflow groove 333 is provided with pipeline and makes it to flow to storage tin case 34 bottoms, in interior time molten tin bath 332 and overflow groove 333, be connected with protection gas and can protect and reduce liquid tin, cross the waterfall place that overflow plate 325 forms at liquid tin especially and can strengthen reduction effect; Liquid tin does not form waterfall yet when entering the storage tin case 34 that contacts with air, flow to the tin recycle pump 31 of the other end along the bottom from an end of storage tin case 34, be depressed into tin divider 32 by tin recycle pump 31 again and enter tin district 321, the uniform aperture on the dividing plate 324 flows to tin distribution zone 322 between tin district 321 and the tin distribution zone 322 by advancing, be provided with plug bar 93 and the plug sealing seam 91 that equates with boiler tube quantity in tin distribution zone 322, liquid tin can not enter corresponding boiler tube when plug bar 93 was depressed sealing, liquid tin can flow into boiler tube through circulation tin import 25 and enter zinc-plated district in the pipe when plug bar 93 lifted, the liquid tin in zinc-plated district can enter into tin heating zone 241 tin liquor face in pipe in the inflow pipe, also can enter out tin heating zone 242 and flow to back molten tin bath 33 through zinc-plated mould 84, the liquid tin in zinc-plated district is not crossed tin distribution zone 322 and the over-pass 336 that advances between the tin flooded zonevvv 323 enters flooded zonevvv 323 in the inflow pipe, flow to storage tin case 34 bottoms by pipeline, protection gas inserts tin distribution flooded zonevvv 323 and is full of whole tin divider 32 by returning tin overflow groove 333, in the waterfall place and the liquid tin generation reduction reaction of the tin face and the over-pass 336 of tin divider 32, the other end by tin divider 32 leads to protection gas divider 43 and is assigned to each root annealing furnace boiler tube 2 again; Liquid tin has passed through storage tin case 34 in working cycle; tin divider 32; zinc-plated district in the pipe; outer molten tin bath 331 and 332 5 zones of interior time molten tin bath returned; wherein storing up tin case 34 contacts with air but does not have waterfall with the outer molten tin bath 331 that returns; can produce small amounts tin or dissolve in minor amounts of oxygen; and zinc-plated district has only that the tin liquor face contacts with protecting gas in the pipe in pipe; a small amount of reductive action can be arranged; but at tin distribution zone 322 and interior time molten tin bath 332; not only contact in addition waterfall strengthens its contact effect with protection gas; can effectively reduce the dissolved oxygen amount in the liquid tin; and reduction stannic oxide wherein, keep liquid tin to be in better state for a long time.

There are three zones to contact in five zones of liquid tin process in working cycle with protection gas; have only two zones to contact with air; and with have two to be the active-surface that the waterfall existence is arranged in three zones contact of protection gas; contact with air whole are the static surface that do not have waterfall; deoxidation speed offset when the dissolved oxygen speed when so liquid tin contacts with air is contacted with protection gas; can effectively suppress the liquid tin dissolved oxygen amount increases, and making it all the time, integral body is in undersaturated condition.Enter the local location of liquid tin at wire rod, because wire temperature and to advance the zinc-plated district of tin temperature higher, the saturated dissolved oxygen amount of liquid tin is higher, its actual dissolved oxygen amount is in undersaturated condition more, the bubble so can not produce oxygen does not need additionally to add reductors such as rare earth metal, has saved cost.

Simultaneously, owing to enter the local location of liquid tin at wire rod, because wire temperature and to advance the zinc-plated district of tin temperature higher, liquid tin is also higher to the saturated meltage of copper, thereby make the molten copper amount of this partial liquid tin also unsaturated, thereby do not influence the combination of copper tin, guaranteed the copper wire tin-plating effect, after having participated in tinned liquid tin and flowing out in the storage tin case 34 from zinc-plated boiler tube 24, because temperature reduces, liquid tin descends to the saturated meltage of copper, in the storage tin case 34 in the liquid tins dissolved copper will separate out and precipitate, can't be pumped to zinc-plated boiler tube 24 again, thereby the liquid tin copper dissolution amount that makes circulation enter zinc-plated boiler tube 24 remains at undersaturated condition.

Wherein, described water cooling plant 5 comprises cyclic water tank, recycle pump, tank, return flume, water receiving tank, dash rubber 51, scrapes glue skin 52 or scrape tin sweat(ing) mould 53; Described return flume and outer returning between the molten tin bath 331 are provided with heat insulation boss, be provided with over-pass 336 between return flume and the tank, dividing plate 324 offers cable-through hole between tank and the water receiving tank, dash rubber 51 is clamped at and stops the water in the tank to flow to water receiving tank in a large number on the cable-through hole, can be provided with in the water receiving tank and scrape glue skin 52, also can be provided with and scrape tin sweat(ing) mould 53; The return flume bottom is provided with the water return outlet that is communicated with cyclic water tank, water return outlet is provided with plug, during the production tinned wire plug is opened, the tank water level is controlled at over-pass 336 upper edges, the tinned wire of downward-sloping operation crosses that over-pass 336 is laggard to be gone into to cool off below the tank water surface, arrive water receiving tank through dash rubber 51, through scraping tin sweat(ing) mould 53 backs to drying unit 6 operations; Tank top also offers high-order water return outlet and is communicated with cyclic water tank, block the water return outlet of return flume when producing bare copper wire with plug, the tank water level is crossed return flume, heat insulation boss, zinc-plated boiler tube 24 outlets are back to flow to cyclic water tank by high-order water return outlet up to flooding to return molten tin bath 331 outward, bare copper wire directly enters under water from zinc-plated boiler tube 24 and cools off, pass to pass again behind the dash rubber 51 and scrape glue skin 52, then to drying unit 6 operations.

Wherein, tin when producing bare copper wire in the zinc-plated boiler tube 24 is discharged from and cleans out, the tin of tin divider 32 over-passs more than 336 solidifies, returning the tin of molten tin bath 33 over-passs 336 or more has also solidified and the inside and outside molten tin bath 331 that returns is separated, tin in the storage tin case 34 also solidifies, zinc-plated die sleeve 82, zinc-plated mould bases 83 and zinc-plated mould 8 are all taken away, and the rising of tank water level makes water enter zinc-plated boiler tube 24 and arrives tin heating zone 241.Because all liquid tins all solidify, the gas that do not need protection is protected tin, only needs gas and protects the bare copper wire in the annealing furnace boiler tube 2 just passable, and can select to use hydrogen or steam to protect bare copper wire this moment.If select hydrogen, can use former passage that hydrogen is fed annealing furnace boiler tube 2 by tube stub, stop all zinc-plated district heating and can carry out bare copper wire production.If select steam; salable hydrogen inlet; to enter tin heating zone 241 is heated to and is lower than the temperature that the tin melt temperature is higher than water generates steam; control suitable heating power and can in advancing the zinc-plated boiler tube 24 of tin heating zone 241, produce required steam and be full of annealing furnace boiler tube 2, bare copper wire is protected.

Wherein, described drying unit 6 comprises oven dry boiler tube, oven dry heat-conducting layer, resistive heater, thermopair, insulating cotton, air channel and blower fan; The oven dry boiler tube offers intake opening near exit end, intake opening is arranged in the air channel, blower fan is blown into the air channel with air and enters the oven dry boiler tube by intake opening then, thus intake opening from oven dry boiler tube import far have little air to the importer to flowing, a large amount of air flow to Way out; The heating zone is between oven dry boiler tube import and blast inlet, heterodromous air make copper line surface water in the heating zone vapor evaporated to oven dry boiler tube inlet flow, make the interior relative humidity of oven dry boiler tube more and more lower to outlet, help copper line surface water and thoroughly dried by import; The air that flows to the outlet of oven dry boiler tube by intake opening can cool off the copper cash of having dried without heating, and copper cash can reach not only dry but also near the perfect condition of room temperature after through 7 blast-cold of cooling wind scoop.

Wherein, cooling wind scoop 7 also can be directed to the air suction inlet of aerofoil fan near the wire rod except that the air cooling wire rod that can utilize aerofoil fan to blow out, and increases cooling performance.

Above-mentioned a kind of circulating tinning stack; when guaranteeing quality product; can avoid using the soldering flux that pollutes; also can avoid or reduce the valuable rare earth metal of use; because of having reduced also saves energy in a large number of a cooling and heating cycle; because of protecting gas shiled dynamically reduction-oxidation tin and the dynamic liquid tin dissolved oxygen amount that reduces; can save the operation that is coated with guide shaft oil and wipes tin ash; also because of having reduced in the changed course downwards of a wire rod; commutation turnover under upwards altering course again; and width scatters, and distance between centers of tracks becomes big requirement in the tin pot to adapt to; thereby simplified drawing lines, when simplifying the operation, also reduced the hidden danger of quality that brings because of the drawing lines complexity.

The above only is preferred embodiment of the present invention, so all equivalences of doing according to the described structure of patent claim of the present invention, feature and principle change or modify, is included in the patent claim of the present invention.

Claims

1. circulating tin plating technique is characterized in that it may further comprise the steps:

2. a kind of circulating tin plating technique according to claim 1 is characterized in that also comprising step 1a before described step 1: copper cash is after tension adjustment, and inlet wire speed and tension stability enter the annealing furnace boiler tube again.

3. a kind of circulating tin plating technique according to claim 1, it is characterized in that: in described step 3 and the step 4, if the too high tinned wire that causes of liquid tin oxygen level has the copper of revealing phenomenon, the rare earth metal or the phosphorus of deoxygenation function can in liquid tin, have been added, to reduce the oxygen level of liquid tin.

4. device of implementing any described circulating tin plating technique of claim 1～3, it is characterized in that: it comprises constant speed and snubber assembly, be arranged in the intravital annealing furnace boiler tube of annealing furnace stove, be communicated with the annealing furnace boiler tube and can feed the boiler tube joint of shielding gas, the annealing furnace boiler tube from import to the downward-sloping setting of Way out; It also comprises the liquid tin recycle system, the shielding gas recycle system, water cooling plant, drying unit and cooling wind scoop; Be disposed with high temperature annealing district, annealing cooling zone, enter the tin heating zone and go out the tin heating zone along the annealing furnace boiler tube from import, to enter the tin heating zone and go out the tin heating zone be zinc-plated boiler tube to described annealing furnace boiler tube described, described zinc-plated boiler tube outlet is socketed with zinc-plated mould, and described zinc-plated mould offers and makes the effusive return flow line of liquid tin; The high temperature annealing district is arranged at import one side near the annealing furnace boiler tube, and described boiler tube joint is arranged at described annealing cooling zone and advances between the tin heating zone, describedly enters the tin heating zone and goes out the tin heating zone and offer the import of circulation tin;

The described liquid tin recycle system comprises tin recycle pump, tin divider, returns molten tin bath and Chu Xixiang, and time molten tin bath is positioned at annealing furnace boiler tube below and is communicated with described return flow line, and storage tin case is positioned at go back to the molten tin bath below; Described time molten tin bath comprises the outer time molten tin bath that is communicated with the return flow line of described zinc-plated mould, and the interior time molten tin bath that is communicated with described storage tin case; The tin recycle pump is arranged in the storage tin case, and described tin divider is arranged at the position of the corresponding described circulation tin import of zinc-plated boiler tube, and described tin divider is communicated with described tin recycle pump;

5. a kind of circulating tinning stack according to claim 4 is characterized in that: described tin divider comprises into Xi Qu, tin distribution zone and flooded zonevvv; Advance between Xi Qu and the tin distribution zone to be provided with dividing plate, described dividing plate evenly is arranged at intervals with aperture, is provided with overflow plate between tin distribution zone and the flooded zonevvv; Described tin distribution zone is communicated with the import of described circulation tin; Described flooded zonevvv is provided with and the parallel overflow ducts of described zinc-plated boiler tube, and described overflow ducts is arranged at out in the tin heating zone, and overflow spout vertically downward, and described overflow spout is communicated with described storage tin case.

6. a kind of circulating tinning stack according to claim 5, it is characterized in that: described tin distribution zone is provided with the plug rod guidance pipe that passes the tin divider up and down, plug rod guidance pipe lower vertical is connected in zinc-plated boiler tube, and interconnect with zinc-plated boiler tube, plug rod guidance pipe bottom endoporus is provided with the poroid plug sealing seam of step, on the plug rod guidance tube wall that is higher than plug sealing seam, offer into tin side opening, describedly advance the tin side opening and be opened in below the liquid tin liquid level that overflow plate limits; Slip cap is provided with the plug bar in the described plug rod guidance pipe, and described plug bar lower end and described plug sealing seam are complementary; Plug bar upper end is connected with and drives the operation handle arm that described plug bar slides up and down.

7. a kind of circulating tinning stack according to claim 6, it is characterized in that: described zinc-plated mould comprises that an end is socketed in the zinc-plated die sleeve in the exit of annealing furnace boiler tube, the other end of described zinc-plated die sleeve is socketed on a zinc-plated mould bases, described zinc-plated mould bases is fixed with a zinc-plated mould, described zinc-plated mould bases offers the tapered hole that runs through described zinc-plated mould bases over against the position of zinc-plated mould core rod, and described tapered hole front end has extended one and gone out the tin hole; Form downward described return flow line between zinc-plated mould bases and the zinc-plated mould; Described return flow line connects zinc-plated mould import and goes back to the molten tin bath bottom.

8. a kind of circulating tinning stack according to claim 7 is characterized in that: described time molten tin bath comprises outer molten tin bath, interior time molten tin bath and the overflow groove of returning, and returns in described molten tin bath thermopair and time molten tin bath electrothermal tube are installed back in the molten tin bath; Be provided with over-pass between overflow groove and interior time molten tin bath; In return molten tin bath and the overflow groove airtight cavity that exists together, an end of this airtight cavity is provided with protection gas access port, the other end is provided with and makes the protection gas connecting passage of protection air-flow to described overflow ducts.

9. a kind of circulating tinning stack according to claim 8 is characterized in that: described tin recycle pump comprises spirrillum centrifugal pump housing, centrifugal pump impeller, impeller pump axle sleeve, centrifugal pump shaft bearing and driving motor; Wherein the spirrillum centrifugal pump housing is fixed on storage tin case bottom, and spiral outlet is by entering the tin-tube road and parallel with the annealing furnace boiler tube advance the tin passage and advance Xi Qu with the tin divider and be communicated with vertically upward, describedly advances the tin passage and is arranged at out in the tin heating zone; The centrifugal pump housing at spirrillum centrifugal pump housing top lid is the circular centrifugal pump housing lid of opening diameter greater than the centrifugal pump impeller diameter, the annulus endoporus of centrifugal pump housing lid greater than corresponding axostylus axostyle external diameter to form tin inlet; Be evenly equipped with the blade of centrifugal pump impeller between top end cap and the lower end cap along annulus; Impeller pump axle sleeve bottom is communicated with storage tin case; Described storage tin case periphery also is provided with described heating unit.

10. a kind of circulating tinning stack according to claim 9, it is characterized in that: described heating unit comprises heat-conducting layer, and described heat-conducting layer is inserted with thermopair, and described heat-conducting layer periphery is provided with stranded resistance wire electro-heat equipment.