CN102978591A - Inside-outside differential pressure chemical plating equipment for porous ceramic tube and film coating method for porous ceramic tube - Google Patents
Inside-outside differential pressure chemical plating equipment for porous ceramic tube and film coating method for porous ceramic tube Download PDFInfo
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- CN102978591A CN102978591A CN2012105450570A CN201210545057A CN102978591A CN 102978591 A CN102978591 A CN 102978591A CN 2012105450570 A CN2012105450570 A CN 2012105450570A CN 201210545057 A CN201210545057 A CN 201210545057A CN 102978591 A CN102978591 A CN 102978591A
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Abstract
The invention discloses inside-outside differential pressure chemical plating equipment for a porous ceramic tube and a film coating method for the porous ceramic tube. The inside and outside differential pressure chemical plating equipment is provided with an intratubular plating solution circulation loop and an intertubular plating solution circulation loop which are used for realizing intratubular plating and intertubular plating, and is also provided with a novel water bath heating system, so that temperature control, water control and stirring for water bath are realized. When plating is carried out outside the porous ceramic tube, the intratubular circulation loop is closed, and the intertubular circulation loop is closed when the plating is carried out inside the porous ceramic tube, so that independent plating is realized. The inside-outside differential pressure chemical plating equipment disclosed by the invention combines heating in water bath with the intratubular and intertubular plating solution circulation loops and has application values in the fields of electroplating or chemical plating inside and outside pipe fittings.
Description
Technical field
The invention belongs to the electroless plating technology field, specifically is inside and outside wall pressure reduction electroless plating specific equipment and method about porous ceramic pipe.
Background technology
In petroleum and chemical industry production, have broad application prospects in the high temperature catalyzed reactions such as the hydrogenation of the separation of high temperature hydrogen-containing gas and hydrocarbons, dehydrogenation and coupling.Take perforated tube (pottery, silica glass, stainless steel etc.) as carrier, inorganic substances compound membrane pipe take palladium or palldium alloy as teleblem, have the advantages such as high temperature resistant, corrosion-resistant, that permeability coefficient is large, separation factor is high, metal consumption is few and preparation cost is low, can be used for preparing high-purity hydrogen and significantly improve reaction conversion ratio.Palladium or palldium alloy can be plated on porous ceramics inside pipe wall or outer wall, and electroless plating has very widely and uses as a kind of plated film means.By retrieval, there are two with chemical plating method and device-dependent patent documentation, wherein, name is called " a kind of method and apparatus of chemical plating outside bath ", publication number is the chemical plating method that the patent documentation of CN 1102862 relates to a kind of tubular workpiece inwall, but have the following disadvantages: the one, lack the plating bath stirring system, affect quality of coating; The 2nd, can only plate single workpiece at every turn, productive rate is lower; The 3rd, plating bath can only flow through in managing, and can only plate the inwall of pipe fitting, the rete limited location.Another name is called " Water bath heating chemical plating plant ", application number is that 03211289 patent documentation relates to a kind of heating in water bath equipment, but this equipment has the following disadvantages: the one, lack water bath monitoring water level and automatic watering system, and can not realize real automatization; The 2nd, the larger weight of volume is heavier, mobile inconvenience; The 3rd, lack the plating bath stirring system, affect quality of coating.More than two patent documentations its weak point is all arranged, first only is to have highlighted plating fluid circulating system and film coating method, and does not introduce the heating system outside the plating bath, and this film coating method is only applicable to manage interior plating; Second only is to have introduced the heating in water bath system, and does not introduce the recycle system and the film coating method of plating bath itself.These two patent documentations are separated the heating system of electroless plating and plating fluid circulating system, do not realize both combinations, can not realize electroless plating automatization, large-scale development.
Summary of the invention
For this reason, for the problems referred to above, the present invention seeks to adapt to the demand of electroless plating automatization, mass-producing and inside and outside wall plated film, propose a kind of equipment and film coating method thereof that can be applied to the inside and outside wall pressure reduction electroless plating of porous ceramic pipe.
For achieving the above object, the present invention takes following technical scheme: the inside and outside wall pressure reduction chemical plating method of porous ceramic pipe, it is characterized in that: it is provided with two groups of circulation loops, plating bath circulation loop in the pipe that first group of circulation loop is comprised of plating bath vacuum flask, recycle pump, plated film pipe fitting and connecting tube; Second group of circulation loop forms vacuum loop in the pipe by plated film pipe fitting, connecting tube, vacuum pump, forms the outer plating bath circulation loop of pipe by plating bath vacuum flask, recycle pump, bath trough and connecting tube simultaneously; In two groups of circulation loops, plated film pipe fitting and bath trough all place the water-bath environment of temperature controllable.When giving plated film pipe fitting inner wall plated film, start first group of circulation loop, close second group of circulation loop, plating bath in the plating bath vacuum flask is in recycle pump is squeezed into the plated film pipe fitting, plating bath constantly flows at the pipe internal recycle, pipe is outer to be the water-bath environment, and the pipe inner tube forms positive pressure differential outward, finishes plating in the pipe after after a while; When giving plated film pipe fitting outer wall plated film, close first group of circulation loop, start second group of circulation loop, plating bath in the plating bath vacuum flask is in recycle pump is driven into bath trough, the plated film pipe fitting is immersed in the bath trough, vacuumize in the pipe, the pipe inner tube forms Negative Pressure Difference outward, finishes plating outside the pipe after after a while.
In described two groups of circulation loops, plating bath vacuum flask, recycle pump and connecting tube in first group of loop, with plating bath vacuum flask, recycle pump and connecting tube in second group of circulation loop for sharing; During the plating inner membrance, only need connecting tube and plated film pipe fitting internal communication; During the plating adventitia, only need connecting tube is communicated with bath trough, simultaneously the plated film inside pipe fitting is communicated with vacuum pump, consist of vacuum loop.
In the bottom of described plating bath vacuum flask and/or the bottom of bath trough one magnetic agitation mechanism is set, plating bath is stirred, this mechanism is included in the magnetic stir bar of placing in the plating bath and the wrapped and power supply of magnetic force of placing outside equipment.
Adopt the rapid abutting joint head to be connected between described plated film pipe fitting and the connecting tube, when a plated film pipe fitting is arranged in the loop, adopt single passage rapid abutting joint head to connect, when many plated film pipe fittings are arranged in the loop, adopt the connection of hyperchannel rapid abutting joint head; Being connected between described rapid abutting joint head and the plated film pipe fitting adopts the back taper sealing-ring to add the set nut Sealing Method.
When giving plated film pipe fitting inner wall plated film, the mode that the pipe inner tube forms positive pressure differential outward is: increase the flowing pressure of plating bath in pipe; Or in plating bath, add certain density sucrose or rare earth ion, such as Yttrium trinitrate, lanthanum nitrate etc., make the inside and outside ionic concn pressure reduction that forms of pipe.
A kind of inside and outside wall pressure reduction chemical plating plant of realizing the porous ceramic pipe of aforesaid method, comprise heating in water bath system and plating fluid circulating system two portions, described heating in water bath system comprises water bath, temperature controller, and the temperature sensor that in water bath, arranges and heating tube, it is characterized in that: a boss that concaves is arranged at the bottom of described water bath, be placed with bath trough at boss, outside at described water bath also is provided with level sensor power supply and pilot circuit, water level sensor, automatically controlled water intaking valve is connected in the pilot circuit, water level sensor is placed in the water bath near top, water level sensor is with pointer, and pointer links to each other with the switch of water-level control circuit; Outer connect valve, external lower valve and water injection valve are arranged on the described bath trough.Described plating fluid circulating system has two kinds of forms, and a kind of form is the interior plating bath circulation loop of pipe that comprises that plating bath vacuum flask, recycle pump, plated film pipe fitting and connecting tube form, and connecting tube is communicated with the plated film pipe fitting; Described plated film pipe fitting places bath trough, and two end supports is on cell wall; Fill water in the described bath trough; Another kind of form is the interior vacuum loop of pipe that comprises that plated film pipe fitting, connecting tube, vacuum pump form, and the outer plating bath circulation loop of pipe of plating bath vacuum flask, recycle pump, bath trough and connecting tube composition; Described vacuum pump is communicated with the plated film pipe fitting by connecting tube, and described plating bath vacuum flask, recycle pump are communicated with bath trough by connecting tube, and described plated film pipe fitting places bath trough, and two end supports is on cell wall; Fill plating bath in the described bath trough.
Bottom at described water bath also is provided with castor.
Outside at described water bath also is provided with magnetic agitation mechanism, and this mechanism comprises magnetic agitation power supply, wrapped, the magnetic stir bar of magnetic force, the wrapped outer bottom that is arranged on described plating bath vacuum flask outer bottom and described water bath of described magnetic force; Described magnetic stir bar is placed in the described plating bath vacuum flask section in the section and described water bath.
Between described connecting tube and plated film pipe fitting, adopt the rapid abutting joint head to connect, when only having a plated film pipe fitting to be connected with connecting tube, adopt single passage rapid abutting joint head, when the many plated film pipe fittings while in parallel is connected with connecting tube, adopt hyperchannel rapid abutting joint head.
Described rapid abutting joint head comprises a tapered elastic rubber ring, a stainless steel sleeve and a set nut, the termination of plated film pipe fitting is nested into first in the tapered elastic rubber ring, both together are nested in the stainless steel sleeve again, and stainless steel sleeve inside is with internal thread, screw with the outside screw of set nut; The other end of described stainless steel sleeve is connected with described connecting tube.
Another purpose of the present invention is to provide the inside and outside wall pressure reduction electroless plating film coating method of porous ceramic pipe.
When carrying out the inside pipe wall plated film of porous ceramic pipe, the method application of aforementioned equipment adopts following steps:
1) at first with temperature regulating device, the level sensing device of heating in water bath system, and each parts of induction stirring mechanism connect and put in place;
2) plating bath vacuum flask, recycle pump, plated film pipe fitting are connected into plating bath circulation loop in the pipe by connecting tube, and the plated film pipe fitting placed in the bath trough, this moment bath trough connect valve outward, external lower valve cuts out, water injection valve is opened, and makes the water in the described water bath flow to bath trough;
3) press design temperature to water-bath heating system heating, start temperature controller simultaneously and level sensing device is monitored;
4) after bath temperature reaches preset value, start recycle pump, make the interior plating bath of plating bath vacuum flask in recycle pump is driven into the plated film pipe fitting, plating bath constantly flows at the pipe internal recycle, pipe is outer to be the water-bath environment, and pipe is interior, the outer formation of pipe positive pressure differential, finishes plating in the pipe after after a while;
When carrying out the pipe outer wall plated film of porous ceramic pipe, the method application of aforementioned equipment adopts following steps:
(1) at first with temperature regulating device, the level sensing device of heating in water bath system, and each parts of induction stirring mechanism connect and put in place;
(2) plated film pipe fitting, vacuum pump are connected into vacuum loop in the pipe by connecting tube, simultaneously plating bath vacuum flask, recycle pump, bath trough are connected into the outer plating bath circulation loop of pipe by connecting tube, and described plated film pipe fitting placed described bath trough, this moment described bath trough connect valve outward, external lower valve is communicated with connecting tube, water injection valve cuts out;
(3) press design temperature to water-bath heating system heating, start temperature controller simultaneously and level sensing device is monitored;
(4) after bath temperature reaches preset value, start recycle pump, make the interior plating bath of plating bath vacuum flask in recycle pump is driven into bath trough, the startup vacuum pump vacuumizes the plated film inside pipe fitting, and formation Negative Pressure Difference in the pipe, outside the pipe is finished plating outside the pipe after after a while.
In the inside and outside wall pressure reduction electroless plating film coating method of described porous ceramic pipe, when carrying out the inside pipe wall plated film of porous ceramic pipe, increase the flowing pressure of plating bath in the plated film pipe fitting, form the inside and outside positive pressure differential plated film of pipe.
When carrying out the inside pipe wall plated film of porous ceramic pipe, in plating bath, add certain density sucrose or rare earth ion, it is poor to increase the inside and outside ionic concn of pipe, forms the inside and outside positive pressure differential plated film of pipe.
In the inside and outside wall pressure reduction electroless plating film coating method of described porous ceramic pipe, no matter when carrying out the inside pipe wall plated film of porous ceramic pipe or managing the outer wall plated film, in plated film, start induction stirring mechanism and carry out the plating bath stirring.
The present invention is owing to take above technical scheme, and it has the following advantages the present invention:
1, the present invention has designed automatization water-bath heating system and two cover plating fluid circulating systems, automatization water-bath heating system is on the basis of the existing water-bath technology of succession, automatic water level control and temperature control have been increased, also increased castor and magnetic agitation mechanism in the bottom of water bath, water bath has been realized that water temperature is controlled, water level is controlled, can have been stirred; Two cover plating fluid circulating systems, one cover is internal circulation system, and a cover is external circulating system, uses the method that internal circulation system has been realized the plating of inside pipe wall pressure reduction, uses the method that external circulating system has been realized the plating of pipe outer wall pressure reduction, and this is to belong to Promethean.New system has larger competitive power in plating or the electroless plating field of the inside and outside wall of pipe fitting.
2, the bath trough in the water bath of the present invention can satisfy respectively the demand of the inside and outside wall film of plating pipe fitting, form the pressure reduction plated film, optimize quality of coating: external valve and lower external valve on one be set respectively in that coating bath is upper and lower, upside also has a water injection valve, when the plating pipe fitting inner wall, upper and lower external valve cuts out, and water injection valve is opened, and water bath communicates with bath trough; Connect plating fluid circulating system in the pipe fitting, make plating bath realize constant temperature, positive pressure differential plated film.Stirring system under the bath trough has guaranteed the homogeneity of plating bath; When plating pipe fitting outer wall, upper and lower external valve connects plating fluid circulating system, circulation plating bath in the bath trough, water injection valve cuts out, inside pipe fitting connects pumped vacuum systems, realizes the Negative Pressure Difference plated film, improves the density of rete and the bonding strength that improves rete and pipe fitting matrix.
3, plating fluid circulating system of the present invention selects hyperchannel rapid abutting joint head to realize the quick connection of multi-pipeline, can satisfy multitube spare, the requirement of simultaneously plating of different size, and the use of back taper sealing-ring screw thread sealing-in method in pipeline connects also guaranteed the stopping property of system.
4, the water bath bottom is equipped with four wheels, has realized the convenient mobile of equipment.
5, when plating pipe outer wall film, pipe fitting is vacuumized and the mobilization dynamic support, negative pressure is effective.
Description of drawings
Plating bath circulation loop synoptic diagram when Fig. 1 is the interior plated film of pipe of the present invention;
Vacuum loop synoptic diagram when Fig. 2 a is the outer plated film of pipe of the present invention;
Plating bath circulation loop synoptic diagram when Fig. 2 b is the outer plated film of pipe of the present invention;
Fig. 3 is the structural representation of filming equipment of the present invention;
Fig. 4 is the STRUCTURE DECOMPOSITION figure of the rapid abutting joint head at C place among Fig. 1.
Fig. 5 a is the film surface shape appearance figure after the present invention does not add positive pressure differential (with no pressure) inside pipe wall plated film;
Fig. 5 b is the film surface shape appearance figure after the present invention adds positive pressure differential inside pipe wall plated film;
Fig. 6 a is the film surface shape appearance figure after the present invention does not add Negative Pressure Difference (with no pressure) pipe outer wall plated film;
Fig. 6 b is the film surface shape appearance figure after the present invention adds Negative Pressure Difference pipe outer wall plated film;
Among the figure, 1-plating bath vacuum flask, 2-recycle pump, 3-plated film pipe fitting, 4-connecting tube, 5-vacuum pump, 6-bath trough, 7-water bath, 8-magnetic stir bar, 9-magnetic force is wrapped, 10-rapid abutting joint head, 11-temperature controller, 12-temperature sensor, 13-heating tube, 14-stainless steel casing, 15-plastic, thermal-insulation layer, 16-urethane liner, 17-boss, 18-magnetic agitation power supply, 19-level sensor power supply, 20-water level sensor, 21-automatically controlled water intaking valve, 22-castor, 23-stainless steel casing, 24-ammonia ester liner, 25-outward connect valve, 26-external lower valve 26,27-water injection valve, 28-tapered elastic rubber ring, 29-stainless steel sleeve, 30-set nut.
Embodiment
Specify embodiments of the present invention below in conjunction with accompanying drawing.
The present invention is the method and apparatus for the poor electroless plating of inside and outside wall pressure of porous ceramics pipe fitting, it has two groups of circulation loops, first group of circulation loop as shown in Figure 1, form plating bath circulation loop in the pipe by plating bath vacuum flask 1, recycle pump 2, plated film pipe fitting 3 and connecting tube 4, be used for the inside pipe wall plated film.Second group of circulation loop is shown in Fig. 2 a～2b, form vacuum loop in the pipe by plated film pipe fitting 3, connecting tube 4, vacuum pump 5, form the outer plating bath circulation loop of a pipe by plating bath vacuum flask 1, recycle pump 2, bath trough 6 and connecting tube 4 simultaneously, plated film pipe fitting 3 places bath trough 6, realizes pipe outer wall plated film.Two groups of loops all place the water bath 7 of temperature controllable, guarantee the film coating environment temperature.
When giving the inside pipe wall plated film, start first group of loop, close second group of loop.Plating bath in the plating bath vacuum flask 1 is in recycle pump 2 is squeezed into plated film pipe fitting 3, and plating bath constantly flows at the pipe internal recycle, finishes electroless plating after after a while.During plated film plated film pipe fitting 3 is placed water bath 7, keep bath temperature, suitably increase the flowing pressure of plating bath in pipe, make overpressure greater than the outer water-bath pressure of pipe, form the inside and outside positive pressure differential plated film of pipe; Or in plating bath, add certain density sucrose or rare earth ion (such as Yttrium trinitrate, lanthanum nitrate etc.), with positive pressure differential inside and outside the inside and outside ionic concn pressure initiation pipe of increase pipe.
When giving pipe outer wall plated film, close first group of loop, start second group of loop.Plating bath in the plating bath vacuum flask 1 is in recycle pump 2 is driven into bath trough 6, and plated film pipe fitting 3 is immersed in the bath trough 6, owing to stopped up by vacuum loop in the pipe fitting, so plating bath can only flow through from the pipe outer wall, realizes the outer plated film of pipe.Suitably add the outer plating bath circulating pressure of bassoon, vacuum loop is made negative pressure in the pipe that in addition is made of plated film pipe fitting 3, connecting tube 4, vacuum pump 5, has just consisted of pipe outer wall Negative Pressure Difference plated film.
In two groups of above-mentioned loops, partial common can be arranged, such as plating bath vacuum flask 1, recycle pump 2 and connecting tube 4 in first group of loop, can with second group of loop in plating bath vacuum flask 1, recycle pump 2 and connecting tube 4 share.Plating is during inner membrance, only needs connecting tube 4 is communicated with plated film pipe fitting 3 by rapid abutting joint 10; Plating is during adventitia, only needs connecting tube 4 is communicated with bath trough 6 to get final product; When plating adventitia simultaneously, plated film pipe fitting 3 is communicated with the formation vacuum loop by rapid abutting joint 10 with connecting tube 4, vacuum pump 5.
For strengthening homogeneity and the velocity of flow of plating bath, the bottom of the plating bath vacuum flask 1 of being everlasting and/or the bottom of bath trough 6 arrange a magnetic agitation mechanism, and this mechanism is included in places magnetic stir bar 8 in the plating bath, and the magnetic force wrapped 9 of placing outside equipment.
Above-mentioned plating bath vacuum flask 1 effect provides the constant temperature plating bath, therefore also can be with selecting other storing units.
Each group can arrange many plated film pipe fittings 3 in loop, links to each other with connecting tube 4 by hyperchannel rapid abutting joint 10, as shown in Figure 1, realizes the requirement of a loop multi-work piece while plating.
Can both realize in same equipment for taking into account the poor electroless plating of inside and outside wall pressure, and make plating bath system and heat-insulation system be applied to simultaneously electroless plating, the present invention arranges the inside and outside wall pressure reduction chemical plating plant that a specific equipment is porous ceramic pipe, comprises heating in water bath system and plating fluid circulating system two portions.
As shown in Figure 3, the part-structure of the existing heating in water bath equipment of heating in water bath system's reference of the present invention comprises water bath 7, temperature controller 11, temperature sensor 12, heating tube 13.Water bath 7 is made of 16 3 layers of stainless steel casing 14, plastic, thermal-insulation layer 15 and urethane liners.Temperature controller 11 is arranged on the water bath outside, links to each other with temperature sensor 12, heating tube 13 simultaneously, and temperature sensor 12 is placed on close top in the water bath, and heating tube 13 is placed in the water bath near the bottom.
The local improvement that the present invention does water bath 7 is, a boss that concaves 17 is produced in the bottom of water bath 7, places bath troughs 6 at boss 17, places magnetic stir bar 8 in the bath trough 6, is equipped with magnetic force wrapped 9 at the outer bottom of boss 17.
In addition, also be provided with magnetic agitation power supply 18 and level sensor power supply 19 in the outside of water bath 7.Magnetic agitation power supply 18 links to each other with magnetic force wrapped 9; Level sensor power supply 19 and pilot circuit, water level sensor 20, automatically controlled water intaking valve 21 are connected in the pilot circuit, and water level sensor 20 is placed on close upper position in the water bath, and automatically controlled water intaking valve 21 is placed in the water bath near the bottom.Use upper and lower the floating of liquid buoyancy promotion water level sensor 20 pointers in the water bath, pointer links to each other with pilot circuit, the opening and closing of the upper and lower unsteady detonator circuit switch of pointer, and the opening and closing of circuit are indicated the opening and closing of automatically controlled water intaking valve 21, and it is controlled to finish water level.Outer bottom at water bath 7 is provided with castor 22.
Boss 17 in water bath 7 is placed bath troughs 6, and bath trough 6 consists of by stainless steel casing 23 and urethane liner 24 are two-layer; Outer connect valve 25, external lower valve 26 and water injection valve 27 are arranged on the bath trough 6.
As shown in Figure 1, 2, plating fluid circulating system of the present invention has two kinds of forms, and a kind of is the interior plating bath circulation loop of pipe that comprises that plating bath vacuum flask 1, recycle pump 2, plated film pipe fitting 3 and connecting tube 4 form.Plating bath vacuum flask 1 water supply valve device for cleaning pipeline is crossed connecting tube 4 and is connected with recycle pump 2, and the other end of recycle pump 2 is connected with an end of plated film pipe fitting 3 by connecting tube 4 again; 1 time water valve device for cleaning pipeline of plating bath vacuum flask is crossed connecting tube 4 and is connected with the other end of plated film pipe fitting 3.In the junction of connecting tube 4 with plated film pipe fitting 3, adopt hyperchannel or single passage rapid abutting joint 10, when only having a plated film pipe fitting 3 to be connected with connecting tube 4, adopt single passage rapid abutting joint head, when 3 whiles in parallel of many plated film pipe fittings are connected with connecting tube 4, adopt hyperchannel rapid abutting joint head.Plated film pipe fitting 3 places bath trough 6, and two ends are passed cell wall by the rapid abutting joint head and are supported in the groove; Bath trough 6 places water bath 7.But for plating in the pipe, this moment outer in the bath trough connect valve 25, external lower valve 26 cuts out, water injection valve 27 is opened, what inject in the bath trough 6 is water; Also can say that the plated film pipe fitting 3 that connects the loop is directly to place water bath 7 this moment.Be placed with magnetic stir bar 8 in plating bath vacuum flask 1, the vacuum flask outer setting has magnetic force wrapped 9, links to each other with the magnetic force power supply.
Another kind of form is the interior vacuum loop of pipe that comprises that plated film pipe fitting 3, connecting tube 4, vacuum pump 5 form, and the outer plating bath circulation loop of pipe of plating bath vacuum flask 1, recycle pump 2, bath trough 6 and connecting tube 4 compositions.The other end that the discrepancy end of vacuum pump 5 respectively connects 4, two connecting tubes 4 of a connecting tube is connected respectively to the two ends of plated film pipe fitting 3, and there is rapid abutting joint 10 plated film pipe fitting 3 ports, and connecting tube 4 and rapid abutting joint 10 is connected.Rapid abutting joint 10 have single passage and hyperchannel minute, different forms is with the internal recycle loop.
The outer plating bath circulation loop of pipe that plating bath vacuum flask 1, recycle pump 2, bath trough 6 and connecting tube 4 form, plating bath vacuum flask 1 water supply valve device for cleaning pipeline is crossed connecting tube 4 and is connected with recycle pump 2, the other end of recycle pump 2 is connected with the outer valve 25 that connects of bath trough 6 by connecting tube 4 again, 1 time water valve device for cleaning pipeline of plating bath vacuum flask is crossed connecting tube 4 and is connected with the external lower valve 26 of bath trough 6, and this moment, the water injection valve 27 of bath trough 6 cut out.Plated film pipe fitting 3 places bath trough 6, and two ends are passed cell wall by the rapid abutting joint head and are supported in the groove.Bath trough 6 places water bath 7 equally.At this moment, except bath trough 6 bottoms arrange the magnetic agitation mechanism, can in plating bath vacuum flask 1 bottom magnetic agitation mechanism be set simultaneously, to strengthen mixing effect.
Two kinds of forms of above-mentioned plating bath system, one is for the plating inside pipe wall, one is that both can not enable simultaneously for plating pipe outer wall.
The above-mentioned single passage of mentioning or hyperchannel rapid abutting joint 10 is connected with plated film pipe fitting 3, is to adopt the back taper sealing-ring to add the locking screw Sealing Method.As shown in Figure 4, rapid abutting joint 10 comprises a tapered elastic rubber ring 28, a stainless steel sleeve 29 and a set nut 30.Tapered elastic rubber ring 28 is inserted in first in the termination of plated film pipe fitting 3, both are nested into plated film pipe fitting 3 and tapered elastic rubber ring 28 in the stainless steel sleeve 29 again, and stainless steel sleeve 29 inside are with internal thread, and set nut 30 is with outside screw, set nut 30 is screwed on, reached the effect of locking and sealing.The other end of stainless steel sleeve 29 is connected with connecting tube 4 again.
On the connecting tube of the above-mentioned connecting tube of mentioning 4 and plating bath vacuum flask 1 or pump, the appropriate location all arranges valve, and this belongs to routine techniques, does not do too much introduction at this.
The above-mentioned plating bath vacuum flask of mentioning 1 effect provides the constant temperature plating bath, therefore also can be with selecting other storing units.
Below be two case study on implementation.
Embodiment 1: inside pipe wall positive pressure differential plated film
(1) water-bath system connects.According to Fig. 3, water bath 7 each system are ready to, the inside water of packing into, the opening power temperature defaults to 40～60 ℃; In plating bath, add the rare earth ion (such as Yttrium trinitrate, lanthanum nitrate etc.) of sucrose or 0.1～0.5g/l according to the weight ratio of 1:100; Bath trough 6 places water bath 7, connects valve 24 outward and external lower valve 25 cuts out, and water injection valve 26 is opened, and makes that water injects bath trough in the water bath 7.
(2) plating fluid circulating system connects.Plating bath vacuum flask 1, recycle pump 2, plated film pipe fitting 3 are connected with connecting tube 4 by first group of loop requirement, open the magnetic agitation power supply, give wrapped 9 energisings of magnetic force of plating bath vacuum flask 1 bottom, plated film pipe fitting 3 places bath trough 6, and plating bath injects vacuum flask 1.
(3) when water bath 7 interior temperature are raised to design temperature, open each valve, ON cycle pump 2, inside pipe wall positive pressure differential electroless plating begins.Thicknesses of layers according to actual needs continues plated film 2～6 hours, and plated film is closed first water valve under the vacuum flask after finishing, and the complete plating bath of question response all is pressed into vacuum flask by recycle pump, the waste liquid recycling.
Because what adopt is the pressure reduction plated film, the plated film time significantly shortens, obtain the thick rete of 8 μ m and can taper to 3 hours by original 8 hours, effect is enhanced about more than once, and the rete that obtains is more fine and close, and rete and basal body interface bonding force rise to 45N(film surface shape appearance figure by original 25N and see Fig. 5 a, Fig. 5 b).In addition, that whole coating process can be realized is temperature automatically controlled, control water, plating bath automated cycle, and a people can operate multiple devices, and single device can be finished the plated film of multi units tube spare simultaneously owing to adopted hyperchannel rapid abutting joint technology, accomplishes scale production.
Embodiment 2: pipe outer wall Negative Pressure Difference plated film
(1) water-bath system connects.According to Fig. 3, water bath 7 each system are ready to, the inside water of packing into, the opening power temperature defaults to 50～70 ℃, opens the magnetic agitation power supply, gives wrapped 9 energisings of magnetic force of bath trough 6 bottoms.
(2) plating fluid circulating system connects.By second group of loop requirement with connecting tube 4 plating bath vacuum flask 1, recycle pump 2 are connected with bath trough outer connect valve 24 and be connected lower valve 25 connect, the water injection valve 26 of bath trough 6 cuts out, and makes the plating bath that contains palladium ion or silver ions or cupric ion flow into bath trough 6 by vacuum flask 1.Bath trough 6 places water bath 7, and plated film pipe fitting 3 places bath trough 6.
(3) vacuum-lines connects.The two ends of plated film pipe fitting 3 are connected with vacuum pump 5 by connecting tube 4, consist of vacuum loop, vacuumize in the pipe fitting.
(4) when water bath 7 interior temperature are raised to design temperature, open each valve, ON cycle pump 2, vacuum pump 5, pipe outer wall Negative Pressure Difference plated film begins.Thicknesses of layers according to actual needs continues plated film 2～6 hours, and plated film is closed first water valve under the vacuum flask after finishing, and the complete plating bath of question response all is pressed into vacuum flask by recycle pump, the waste liquid recycling.
Because what adopt is the pressure reduction plated film, the plated film time significantly shortens, obtain the thick rete of 8 μ m and can taper to 4 hours by original 8 hours, effect doubles, and the rete that obtains is more fine and close, and rete and basal body interface bonding force rise to 40N(film surface shape appearance figure by original 25N and see Fig. 6 a, Fig. 6 b).In addition, that whole coating process can be realized is temperature automatically controlled, control water, plating bath automated cycle, and a people can operate multiple devices, and single device can be finished the plated film of multi units tube spare simultaneously owing to adopted hyperchannel rapid abutting joint technology, accomplishes scale production.
Claims (10)
1. the inside and outside wall pressure reduction chemical plating plant of a porous ceramic pipe, comprise heating in water bath system and plating fluid circulating system two portions, described heating in water bath system comprises water bath, temperature controller, and the temperature sensor that is connected with temperature controller and the heating tube that in water bath, arrange, described plating bath system comprises a bath trough, it is characterized in that:
The bottom of described water bath is manufactured with a boss to the groove indent, places described bath trough at boss, be provided with magnetic agitation mechanism at the boss outer bottom;
Be provided with outer connect valve, external lower valve and water injection valve on the described bath trough;
Described heating in water bath system also includes level sensing device;
Described plating fluid circulating system has two kinds of forms, a kind of is to comprise plating bath vacuum flask, recycle pump, plated film pipe fitting, plating bath circulation loop in the pipe that composes in series by connecting tube, wherein said plated film pipe fitting places described bath trough, is connected with the water in the heating in water bath system in the described bath trough; Another kind is to comprise vacuum pump, plated film pipe fitting, vacuum loop in the pipe that composes in series by connecting tube, and comprise plating bath vacuum flask, recycle pump, bath trough, the outer plating bath circulation loop of the pipe that composes in series by connecting tube, wherein said plated film pipe fitting places described bath trough, fills plating bath in the described bath trough.
2. the inside and outside wall pressure reduction chemical plating plant of porous ceramic pipe according to claim 1, it is characterized in that: between described connecting tube and plated film pipe fitting, adopt the rapid abutting joint head to connect, when only having a plated film pipe fitting to be connected with connecting tube, adopt single passage rapid abutting joint head, when having the many plated film pipe fittings while in parallel to be connected with connecting tube, adopt hyperchannel rapid abutting joint head.
3. the inside and outside wall pressure reduction chemical plating plant of porous ceramic pipe according to claim 2, it is characterized in that: described rapid abutting joint head comprises a tapered elastic rubber ring, a stainless steel sleeve and a set nut, the termination of described plated film pipe fitting is nested in the tapered elastic rubber ring, both together are nested in the stainless steel sleeve again, stainless steel sleeve inside is with internal thread, screw with the outside screw of set nut, the other end of described stainless steel sleeve is connected with described connecting tube.
4. the inside and outside wall pressure reduction chemical plating plant of porous ceramic pipe according to claim 1, it is characterized in that: described level sensing device is included in level sensor power supply and the pilot circuit of described water bath outer setting, at inner water level sensor and the automatically controlled water intaking valve that arranges of water bath, described water level sensor and automatically controlled water intaking valve are connected in the pilot circuit, the pointer of water level sensor links to each other with the switch of pilot circuit, the unlatching of the described automatically controlled water intaking valve of described on-off control.
5. the inside and outside wall pressure reduction chemical plating plant of porous ceramic pipe according to claim 1, it is characterized in that: described magnetic agitation mechanism, comprise that the magnetic force that is arranged on described water bath boss outer bottom is wrapped, and be placed on the magnetic stir bar in the described bath trough; Comprise that also the magnetic force that is arranged on described plating bath vacuum flask outer bottom is wrapped, and be placed on the magnetic stir bar in the described plating bath vacuum flask.
6. the inside and outside wall pressure reduction chemical plating plant of porous ceramic pipe according to claim 1, it is characterized in that: the bottom at described water bath is provided with castor.
7. the inside and outside wall pressure reduction electroless plating film coating method of the porous ceramic pipe implemented of the described equipment of one of an application such as claim 1～6 is characterized in that:
When carrying out the inside pipe wall plated film of porous ceramic pipe, adopt following steps:
1) at first with temperature regulating device, the level sensing device of heating in water bath system, and each parts of induction stirring mechanism connect and put in place;
2) plating bath vacuum flask, recycle pump, plated film pipe fitting are connected into plating bath circulation loop in the pipe by connecting tube, and the plated film pipe fitting placed in the bath trough, this moment bath trough connect valve outward, external lower valve cuts out, water injection valve is opened, and makes the water in the described water bath flow to bath trough;
3) press design temperature to water-bath heating system heating, start temperature controller simultaneously and level sensing device is monitored;
4) after bath temperature reaches preset value, start recycle pump, make the interior plating bath of plating bath vacuum flask in recycle pump is driven into the plated film pipe fitting, plating bath constantly flows at the pipe internal recycle, pipe is outer to be the water-bath environment, and pipe is interior, the outer formation of pipe positive pressure differential, finishes plating in the pipe after after a while;
When carrying out the pipe outer wall plated film of porous ceramic pipe, adopt following steps:
(1) at first with temperature regulating device, the level sensing device of heating in water bath system, and each parts of induction stirring mechanism connect and put in place;
(2) plated film pipe fitting, vacuum pump are connected into vacuum loop in the pipe by connecting tube, simultaneously plating bath vacuum flask, recycle pump, bath trough are connected into the outer plating bath circulation loop of pipe by connecting tube, and described plated film pipe fitting placed described bath trough, this moment described bath trough connect valve outward, external lower valve is communicated with connecting tube, water injection valve cuts out;
(3) press design temperature to water-bath heating system heating, start temperature controller simultaneously and level sensing device is monitored;
(4) after bath temperature reaches preset value, start recycle pump, make the interior plating bath of plating bath vacuum flask in recycle pump is driven into bath trough, the startup vacuum pump vacuumizes the plated film inside pipe fitting, and formation Negative Pressure Difference in the pipe, outside the pipe is finished plating outside the pipe after after a while.
8. the inside and outside wall pressure reduction electroless plating film coating method of porous ceramic pipe according to claim 7: it is characterized in that: when carrying out the inside pipe wall plated film of porous ceramic pipe, increase the flowing pressure of plating bath in the plated film pipe fitting, form the inside and outside positive pressure differential plated film of pipe.
9. the inside and outside wall pressure reduction electroless plating film coating method of porous ceramic pipe according to claim 7: it is characterized in that: when carrying out the inside pipe wall plated film of porous ceramic pipe, in plating bath, add certain density sucrose or rare earth ion, it is poor to increase the inside and outside ionic concn of pipe, forms the inside and outside positive pressure differential plated film of pipe.
10. the inside and outside wall pressure reduction electroless plating film coating method of porous ceramic pipe according to claim 7: it is characterized in that: no matter when carrying out the inside pipe wall plated film of porous ceramic pipe or pipe outer wall plated film, in plated film, start induction stirring mechanism and carry out the plating bath stirring.
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