CN100529627C - Sealed hot-air agitating device for nitrogen-protective soldering furnace - Google Patents
Sealed hot-air agitating device for nitrogen-protective soldering furnace Download PDFInfo
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- CN100529627C CN100529627C CNB2007100209962A CN200710020996A CN100529627C CN 100529627 C CN100529627 C CN 100529627C CN B2007100209962 A CNB2007100209962 A CN B2007100209962A CN 200710020996 A CN200710020996 A CN 200710020996A CN 100529627 C CN100529627 C CN 100529627C
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Abstract
This invention discloses a kind of sealed hot wind stirring device that is used in nitrogen protection brazing furnace, belonging to the domain of sealed stirring device. Its technical programme is: the device includes brazing furnace and internal circulation fan, the brazing furnace being connected with impellers of internal circulation fan by pedestal, the impeller of the internal circulation fan being in the inside of the brazing furnace, the impeller shaft that is connected with the impeller being through pedestal and connected with electric motor, there being joint ring between the pedestal and the pedestal shaft, the impeller has two layers of paddles: the upper and the lower, the upper layer of paddles being located in the pipe and the lower layer of paddles out of the pipe, there being heating pipe under the impellers. The impeller of this invention delivers the preheated pour nitrogen vertically downwards by the effect of stirring and the function of the pipe, and the nitrogen flow bloated out by the upper paddles will diffuse all around by the effect of the revolution of lower paddles, which has two merits: firstly, to make the gas in more large area exchange heat, secondly, the area of the gas flow blowing to workpieces is enlarged and the temperature of the gas flow is homogeneous.
Description
Technical field
The present invention relates to a kind of sealed agitating device, relate in particular to a kind of sealed hot-air agitating device for nitrogen-protective soldering furnace.
Background technology
Aluminum brazing furnace is a kind of equipment that each parts of aluminium heater are effectively connected.Be that this characteristic of utilizing the alloy melting point of almit Al-Si to be lower than components A l metal material fusing point is welded.Solder places near the solder side that needs connecting portion or the inside usually; between parts and solder side, reach the surface and scribble soldering flux; after drying is installed; parts are heated to the brazing alloy fusion and the infusible temperature of parts metal under the protection of certain inert gas atmosphere; soldering flux is broken the oxide-film of aluminium simultaneously; allow its motlten metal and do not carry out diffusion into the surface between the deposite metal, after the cooling, braze metal will with the parts contact-making surface between form metal and combine.
Workpiece such as aluminium alloy be welded with two important requirements:
At first be the oxygen content concentration in the atmosphere, because aluminium alloy can be accelerated in oxidation rate more than 300 degrees centigrade, the oxygen content height easily causes the workpiece oxidation and causes the welding failure in the atmosphere, and oxygen content need be controlled under the magnitude of a few millionths usually, thereby having relatively high expectations for the atmosphere sealing; The temperature of nitrogen-protective soldering furnace brazing area is 580 ~ 650 ℃; under this temperature; because the draught fan impeller axle rotates at a high speed; have bigger gap, thereby cause nitrogen to leak easily, oxygen enters; thermal loss; can cause the welding failure when serious, so the sealing problem of soldering oven is extremely important, does not have a kind of in the descending effective seal method of batch (-type) (semi continuous) duty at present as yet.The important requirement of another one is that workpiece is heated evenly since the workpiece of welding often size is bigger, be heated to be not easy evenly, and the workpiece inhomogeneous position that causes easily that is heated is inconsistent weld interval, and cause welding inhomogeneous, and then welding failure.In addition, in the prior art, blower fan uses the individual layer impeller usually, because workpiece size is bigger in the stove, the hot blast that blower fan blows out often concentrates on a certain part of workpiece to be heated, and workpiece is heated and is difficult for reaching fast homogenising.
Summary of the invention
The purpose of this invention is to provide a kind of sealed hot-air agitating device for nitrogen-protective soldering furnace, this installs good sealing effect, and it is even to stir the back workpiece temperature.
The present invention adopts following technical scheme:
A kind of sealed hot-air agitating device for nitrogen-protective soldering furnace; comprise soldering body of heater 1 and interior circulating fan 2; the impeller shaft 22 of soldering body of heater 1 and interior circulating fan 2 is connected by pedestal 3; the impeller 21 of interior circulating fan 2 is in the soldering body of heater 1; the impeller shaft 22 that is connected with impeller 21 passes pedestal 3 and links to each other with motor 23; between impeller shaft 22 and pedestal 3, be provided with sealing ring 4; in soldering body of heater 1, be provided with air channel cage 5; when interior circulating fan 2 is worked; the wind that separate in the cover 5 in the air channel blows to workpiece 6 downwards from top; thereby upwards flow by the space of air channel cage 5 outsides again and form circulation; impeller 21 has two-layer blade 211 up and down; 212; upper strata blade 211 is positioned at the pipeline 51 of air channel cage 5, and lower leave 212 is in outside the pipeline 51, is provided with heating tube 18 below impeller 2.
In the technical program, for making convenient disassembly adopt following technical scheme: impeller shaft 22 quilts two bearings (71,72) up and down are connected on the pedestal, seal washer 7 is positioned at bearing 71 tops, and the end cap of being located on the pedestal 8 is fixed, wherein top bearing 71 adopts the centripetal thrust force angular contact ball bearing, be provided with axle sleeve 9 above bearing, impeller shaft and auxiliary device thereof are pressed on the inner ring of top bearing 71 by axle sleeve 9, and the bearing of below is fixed by end cap.For making the temperature of impeller shaft be unlikely to too high, also be provided with water collar 10 in impeller shaft 71 outsides.Be provided with nitrogen inlet at the agitating device top, slit from impeller shaft 71 between the outside and water collar 10 and bearing outer ring side eddy current air drain, constantly charge into nitrogen with the eddy current form from the top to the impeller direction along the gap of impeller shaft and other parts, to eliminate condensation, improve atmosphere and the impeller shaft heat is uploaded.Be further to increase sealing effectiveness, between soldering body of heater 1 and pedestal 3, connect, connect and scribble the temperature resistant encapsulation that mixes by graphite powder and sodium silicate inorganic bond in the seam, fill out mixture with flange.For making impeller and impeller shaft convenient disassembly, can not decompose integral demounting for assembling to be connected also between impeller 21 and the impeller shaft 22.When sealing ring 4 was the oil-containing sealing ring, its sealing effectiveness was better.Also be provided with back blades at the impeller shaft front end, to increase the guidance quality of air-flow.
Inventive principle: each active section structure function of batch (-type) nitrogen-protective soldering furnace is introduced.
1, dry kiln: hothouse inside is made up of hot air circulation temperature control heating system.Tubular electric heating and interior circulating fan, digital temperature controller, solid-state relay (or temperature control module) are formed chain heating control system.Exhaust outlet is equipped with in the hothouse upper end, links to each other with external exhaust blower pipeline.Brazing flux dust collection dish is equipped with in the hothouse bottom, can dismantle from the side, regularly removes indoor rubbish.Arrival end dress metal curtain, the workpiece height limiter is equipped with in the outside, with the anxious chain work that stops, reports to the police of transmission; The port of export and clean room join, can be with the recycling once more back of the nitrogen that the clean room discharges outside steam is discharged hothouse.
2, clean room: indoor skin is the stainless steel manufacturing, and two cover temperature controllers are controlled the not two outer temperature of overlapping radiant heaters of chamber of horse respectively, and the outside is provided with heat-insulation layer, and skeleton is a formed steel construction.Cross over the two ends of workpiece, in the metal curtain is housed, the port of export is equipped with pneumatic door, can be according to service requirement adjustment and automatic shutter, inlet links to each other with hothouse, the flow of warm nitrogen gas drying chamber of discharging behind the purification utilization can be utilized once more.When workpiece was parked in therebetween, the inflated with nitrogen regulated device that is provided with in the clean room and the flow of warm nitrogen gas of utilizing the soldering section to discharge purified workpiece, to improve the utilization rate of thermal power transfer and nitrogen.
3, soldering section: this section working chamber be by airtight double-deck horse not in hall and two the electrical heating districts and two interior circulating fans constitute, the burner hearth two ends are provided with pneumatic door, can be according to the gap and the automatic shutter state of service requirement adjustment inlet.Structure is the heat-resistance stainless steel manufacturing entirely, the about 400mm of insulation layer thickness, maximum operating temperature reaches 700 ℃, for the ease of safeguarding and the raising thermal efficiency, top adopts the built-in high-temperature electric heat rod of insertion to heat temperature adjustment, be divided into two temperature-controlled areas (to improve temperature-controlled precision), heater suitably is arranged in the top of driving-belt and workpiece; Two groups of radiant type electric heaters are equipped with in the below in the body of heater outside, and by the chain control of two cover temperature control assemblies, make it to utilize better electric heater that the direct radiation of workpiece added thermal effect and temperature control performance.In the process of inflated with nitrogen heating, adopted the interior thermal circulation fan of two low noises to carry out enforceable atmosphere heat convection, to improve the uniformity of each point temperature, atmosphere.The two-port of every electrical bar is equipped with the seal washer locking nut, to protect the nitrogen unfailing performance at work and the convenience of maintain and replace.Two soldering residues removing mouths are equipped with in the braze chamber bottom, can dismantle from the side, regularly remove inner residue.Brazing area nitrogen access to plant has adopted by after purifying the preheating chamber preheating, and thermal circulation fan mixes and enters furnace chamber in two low noises that reinject, not influence the temperature stability in the stove and the uniformity of atmosphere in the process that guarantees soldering.In the use of nitrogen by flowmeter, manually adjust valve, magnetic valve etc. and form flow observation, control system; By a cover sampling pump, little analysis of oxygen content instrument is formed the gas concentration detection system.Two system mutuals can be controlled quality technological requirement and best consumption gas production cost effectively.
4, water cooling chamber: be made up of the double-layer stainless steel structure, furnace chamber therefrom passes the formation cooling jacket, and the port of export is equipped with metal air curtain curtain and pneumatic door, can be according to the service requirement automatic shutter, and outer side of door is equipped with gas skirt (access gas exhaust piping).
Indoor by three the part form.First is: the heat convection of water jacket compartment inwall environment and heated work pieces; Second portion is: circulating fan and water-cooled pipe type heat exchanger combination in the water cooling chamber strengthens heat exchange; Third part is: cold nitrogen air curtain compensation atmosphere.Water cooling chamber forms the water supply and sewage road by a water inlet and an overfall.Design feature: improved the heat exchange effect, shortened cool time, the controllability of interior circulating fan and cooling water system can make temperature lowering curve become adjustable.When the workpiece operation is come out of the stove, when the nitrogen feed system can change nitrogen supply (NS) amount in the stove automatically and changes in the stove nitrogen pressure reduction, at first be that cold nitrogen air curtain is to workpiece air cooling, thereafter automatic time delay reduces nitrogen adjusting supply again, to guarantee the atmosphere requirement of workpiece in transmission and cooling procedure.Interior circulating fan can require omnidistance speed change according to the cooling of workpiece, regularly open and close, for the cooler environment of workpiece requires to provide motor-driven reliable operating condition.
5, aircooling cabinet: indoor mainly is to be constituted one-way gas flow and discharged outdoor by hair-dryer and exhaust blower.Process is that the workpiece that will cool off in atmosphere runs to and forces in the air to be cooled near environment temperature, and the heat that swaps out and waste gas is discharged simultaneously outdoor, is convenient to the operation of removal workpiece operation.
6, upper and lower workpiece section: be respectively maximum workpiece enough open type working faces are provided, form by self-loopa driving-belt, formed steel construction.
7, transmission device: device constitutes the synchronous operation mechanism of connecting by last workpiece, drying, preheating, soldering, water cooling section, two driving-belts of air-cooling chamber and following workpiece section, main drive is the reducing gear that threephase asynchronous machine and reductor are formed, and is moved by electrical control.Travel line speed can be set in 1000 ~ 2000mm/min scope, and can be set at equal speed change raising speed starting as required, to even speed change deceleration halted state.Can show the machine operation frequency as required, the operation actual linear velocity of driving-belt also can be set the operating system of motor overload (moment) guard mode.
8, the bloated processing of body of heater line: the body of heater of equipment has the length variations amount of expanding with heat and contract with cold in various degree in the normal temperature state change procedure different with operating temperature, can influence some position distortion of beat kinematic error and body of heater and hinder operate as normal.Therefore, apparatus linear expansion coefficient power-assist, slip cancellation element.Mainly form by travelling carriage, power-assist cylinder.
9, temperature control system: dry section is formed the chain control circuit of temperature by a digital temperature controller of cover and a temperature sensor with an interior thermal circulation fan and electric heater; Purify upper and lower two ones of preheating zone, form the chain control circuit of temperature by the two digital temperature controllers of cover and temperature sensor and two electrocaloric effects respectively; Brazing area is formed the chain control circuit of temperature by two cover digital temperature controllers and temperature sensors with two interior circulating fans and two district's electric heaters, controls the interior two ends of brazing area adjustment respectively.Electric heating is regulated and is adopted silicon-controlled voltage regulation module input instrument temperature PID4～20mA continuous signal to carry out the continuous electric flow of control heater, reach control, stabilized operating temperature.
10, warning system: the upper and lower limit of each temperature control point temperature of soldering oven is reported to the police, hydraulic pressure and flow, compressed air pressure, nitrogen pressure are reported to the police, little oxygen amount detection range is reported to the police, each road motor overload is reported to the police, workpiece spacing alarms etc. can be by the regional location of control operation screen indication directly perceived alarm point.
The present invention obtains following useful technique effect:
1. impeller of the present invention adopts twi-tier blade, the upper strata blade is arranged in pipeline, the top is vertically down carried by the effect of stirring and pipeline through the pure nitrogen gas of preheating, and lower leave is positioned at outside the pipeline, bottom near pipe outlet, because do not have the blocking of duct wall with the same horizontal level of impeller this moment, the centrifugal action of the lower leave that vertically down the nitrogen stream that the upper strata blade is produced by boasting will be rotated and to around diffusion, this work
2. with having the advantage of two aspects: on the one hand, make that the gas in the bigger zone carries out heat exchange, thereby make temperature easier to be even, on the other hand, the flow area that blows to workpiece has enlarged, and the temperature of air-flow that blows to workpiece is also more even.
3. the present invention is provided with sealing ring between impeller shaft and pedestal, makes the nitrogen atmosphere and the atmospheric isolation of outside in the stove, thereby has guaranteed that the success of welding carries out.
4. among the present invention, because impeller shaft rotates at a high speed, be easy to cause the gap between impeller shaft and the pedestal bigger, thereby can cause the sealing effectiveness variation, thereby select the oil-containing sealing ring for use, utilize the sealing function of liquid, make that furnace gas is difficult for exchanging with extraneous air more, thereby increased sealing effectiveness.
5. among the present invention, around impeller shaft, increased water-cooling jacket, between the outside and water collar slit of impeller shaft and from they bearing outer ring side eddy current air drain, constantly charge into an amount of nitrogen along the surface of impeller shaft with the eddy current form from the top to the impeller direction, to eliminate condensation, improve atmosphere and the impeller shaft heat is uploaded, make the operating temperature of impeller shaft reduce, on the one hand, make the operating temperature of oil-containing sealing ring reduce, Seal Oil is difficult for running off, and sealing effectiveness is better; On the other hand, because the reduction of operating temperature makes increase the service life of draught fan impeller axle.
The present invention by axle sleeve with the gravity of impeller shaft and annex thereof act on adopt the centripetal thrust force angular contact ball bearing in put, make that the running of impeller shaft is more stable.
7. the present invention adopts the centripetal thrust force angular contact ball bearing, and facility such as end cap is set, make this agitating device downwards folk prescription promptly remove the locking nut of end cap and restriction impeller shaft to dismounting, impeller shaft and the whole removal of impeller dismounting and maintenance can have been made things convenient for.
8. the present invention is connected adopting to assemble between impeller shaft and the impeller, thereby makes that assembling is convenient.
9. the present invention fills with graphite and sodium silicate inorganic bond filler between flange and soldering body of heater, because graphite is exotic material, thereby makes in higher temperature lower seal better effects if.
10. the present invention separates cover 3 by adopting the air channel, make the gas in the soldering body of heater circulate according to a certain direction, after hot gas after the heating of process heating tube blows to colder relatively workpiece, produce the relatively low gas of temperature, suction function by impeller is stirred by impeller again from cage outside, air channel, then mix again with hot gas, therefore by the direction of interior air circulation fan impeller is set, thereby make the inside and outside gas travels through workpiece circulation mixed flow of cage flow, can play the good thermal effect that adds.
11. for strengthening blast, of the present invention in the impeller of thermal circulation fan have 8, be divided into two groups and be divided on the two-layer circumference that evenly is arranged on rotating shaft, two-layer impeller is interlaced to be arranged in the rotating shaft; Four impellers of every layer 90 degree at interval are provided with, and the angle of every impeller is 35 degree.Also be provided with back blades at the impeller shaft front end, to increase the guidance quality of air-flow.
Description of drawings
Fig. 1 is a soldering oven installation drawing of the present invention.
Fig. 2 is a soldering oven A part partial enlarged drawing of the present invention.
Fig. 3 is a B part enlarged drawing among Fig. 2 of the present invention.
Fig. 4 is a C part enlarged drawing among Fig. 2 of the present invention.
The specific embodiment
A kind of sealed hot-air agitating device for nitrogen-protective soldering furnace; comprise soldering body of heater 1 and interior circulating fan 2; the impeller shaft 22 of soldering body of heater 1 and interior circulating fan 2 is connected by pedestal 3; the impeller 21 of interior circulating fan 2 is in the soldering body of heater 1; the impeller shaft 22 that is connected with impeller 21 passes pedestal 3 and links to each other with motor 23; between impeller shaft 22 and pedestal 3, be provided with sealing ring 4; in soldering body of heater 1, be provided with air channel cage 5; when interior circulating fan 2 is worked; the wind that separate in the cover 5 in the air channel blows to workpiece 6 downwards from top; thereby upwards flow by the space of air channel cage 5 outsides again and form circulation; impeller 21 has two-layer blade 211 up and down; 212; upper strata blade 211 is positioned at the pipeline 51 of air channel cage 5; lower leave 212 is in outside the pipeline 51, is provided with heating tube 18 below impeller 2, and every layer of blade can have 2 or 3 or 4; the angle of blade is position 30-60 degree usually, and blade is staggeredly placed.
A kind of sealed hot-air agitating device for nitrogen-protective soldering furnace; comprise soldering body of heater 1 and interior circulating fan 2; the impeller shaft 22 of soldering body of heater 1 and interior circulating fan 2 is connected by pedestal 3; the impeller 21 of interior circulating fan 2 is in the soldering body of heater 1; the impeller shaft 22 that is connected with impeller 21 passes pedestal 3 and links to each other with motor 23; between impeller shaft 22 and pedestal 3, be provided with sealing ring 4; sealing ring can be set in place between the axle sleeve and pedestal of centripetal thrust force angular contact ball bearing top; in soldering body of heater 1, be provided with air channel cage 5; when interior circulating fan 2 is worked; the wind that separate in the cover 5 in the air channel blows to workpiece 6 downwards from top; thereby upwards flow by the space of air channel cage 5 outsides again and form circulation; impeller 21 has two-layer blade 211 up and down; 212; upper strata blade 211 is positioned at pipeline 51; this pipeline 51 can be arranged on the impeller shaft pedestal; also can be fixed on the body of heater; lower leave 212 is in outside the pipeline 51; make the wind direction that is blown blow out all around; below impeller 2, be provided with heating tube 18, be used to heat the temperature of furnace atmosphere to needs.
In the present embodiment, for making convenient disassembly adopt following technical scheme: impeller shaft 22 quilts two bearings (71,72) up and down are connected on the pedestal, seal washer 7 is positioned at bearing 71 tops, and the end cap of being located on the pedestal 8 is fixed, wherein top bearing 71 adopts single power centripetal force thrust ball bearing, above bearing, be provided with axle sleeve 9, the locking nut that impeller shaft and auxiliary device thereof are set at its top limits, and be pressed in by axle sleeve 9 on the inner ring of top bearing 71, the bearing of below is fixed by the end cap that is arranged on the pedestal.For making the temperature of impeller shaft be unlikely to too high, also be provided with water collar 10 in impeller shaft 71 outsides, be provided with the eddy current air drain, constantly in the top centripetal thrust force angular contact ball bearing end cap of axle, charge into an amount of nitrogen with the eddy current form between the outside and water collar slit of impeller shaft and from their bearing outer ring side to the impeller direction along the surface of impeller shaft, to eliminate condensation, improve atmosphere and the impeller shaft heat is uploaded.For further increasing sealing effectiveness, between soldering body of heater 1 and pedestal 3, connect with flange, scribble the temperature resistant encapsulation agent that mixes by graphite powder and sodium silicate inorganic bond in the connection seam, its ratio can be an arbitrary proportion.For making impeller and impeller shaft convenient disassembly, be connected for assembling between impeller 21 (being actually the impeller that has the part impeller shaft) and the impeller shaft 22, for example, also can adopt the screw connection with being threaded or connecting with bolting.Sealing ring 4 is the oil-containing sealing ring, and its sealing effectiveness is better, and oil can be used conventional Seal Oil, also available resistant to elevated temperatures Seal Oil.
During dismounting, the connection of at first removing on the ring flange is unloaded pedestal from the soldering body of heater, as long as remove the locking nut that upper end cover is arranged at impeller shaft top, and can be with its impeller with the unidirectional dismounting of impeller shaft (downwards).
Be to strengthen blast, of the present invention in the impeller of thermal circulation fan have 8, be divided into two groups and be divided on the two-layer circumference that evenly is arranged on rotating shaft, two-layer impeller is interlaced to be arranged in the rotating shaft; Four impellers of every layer 90 degree at interval are provided with, and the angle of every impeller is 35 degree.Also be provided with back blades at the impeller shaft front end, to increase the guidance quality of air-flow.
Nitrogen-protective soldering furnace batch furnace the key technical indexes and parameter (wherein a kind of specification)
1, appearance and size: long by 16500 * wide by 2400 * high by 2400
2, braze chamber sectional dimension: wide by 1200 * high by 350
3, maximum input space cross section: wide by 1050 * high by 250
4, electric power is equipped with: 250kw 380V 50Hz
1. power: 10kw
2. dry heat section: 60kw
3. purify preheating section: 60kw
4. heating soldering section: 120kw
5, temperature range:
1. dry heat section: 150～250 ℃, 300 ℃ of max
2. purify preheating section: 300～450 ℃, 500 ℃ of max
3. heating soldering section: 580～650 ℃, 700 ℃ of max
6, soldering section temperature control deviation: 〉=5 ℃
7, preheating time: 〉=120min first
8, workpiece transmission speed: 1000-2000mm/min (frequency control, reference value)
9, the kind of drive: the transmission of chain belt counting, pitch: 76.2mm (3 inches)
10, working method: cycle (intermittently) formula transmission: (5～35 ℃ of operating ambient temperatures)
11, cycle time scope: 5～35min/ time (by the actual process requirement)
12, beat distance: 2450mm (reference value is made on request)
13, nitrogen consumption: 50～80m
3/ h (supply gas pressure: 0.1～0.2MPa constant voltage)
Nitrogen requires: purity:＞99.999%; Dew point :-62 ℃
14, cooling-water consumption: 4～8m
3/ h (10～25 ℃ of demineralized water water temperatures, the user can provide cooling back installation for oneself, and water quality requirement can be with reference to the GB10067.1-88 standard.)
15, compressed air: 0.6～0.8MPa
Operating process and principle brief introduction
At first, check whether each road of water, electricity, gas is normal by the operation requirement, the technology brazing temperature that the preheating of soldering oven section reached more than 600 ℃ in about 120 minutes, intensification is opened work to oxygen content with the inflated with nitrogen system simultaneously and is lower than below the 50ppm.About 20～30 minutes of hothouse work is to reach 150～200 ℃ of technology baking temperatures. and (detail operations is seen explanation in addition) can carry out following operation with that.
1, go up part:
The radiator core body (hereinafter to be referred as workpiece) that will assemble by technological requirement, blow down unnecessary band water solder flux through brazing flux spray and high-pressure blast, then, again workpiece is moved on the driving-belt of last part end of soldering oven mark made from the center or the spacing alarm position that does not exceed positioning detector.
2, drying:
Workpiece in the material loading section through the timing automatic hothouse that moves to, and rest on hothouse and carry out heat drying, make moisture on the workpiece become steam and discharge outdoorly through circulating fan and exhaust outlet, and workpiece is heated to more than 180 ℃, tentatively finish dry run this moment.
3, purify:
After workpiece enters the clean room from hothouse, will be incubated intensification further and utilize the flow of warm nitrogen gas of discharging in the soldering oven to carry out drying and purify to reach the purpose of attenuating oxygen content.This section also is provided with auxiliary nitrogen and regulates inlet, to guarantee depuration quality.
4, soldering:
Move into again after work is cleaned and carry out in the soldering oven heating up under the high pure nitrogen protection.After finishing fine weldering program, workpiece will be admitted to the cooling zone and cool off.
5, water cooling:
Workpiece is that the metallic walls of main carrier and water collar is carried out heat exchanging process with nitrogen atmosphere in the water cooling district, circulating fan and water-cooled heat exchanger make it to improve heat exchanger effectiveness in being aided with, the crystallization of workpiece cooling solder is solidified, form soldered fitting, when workpiece temperature is reduced to below 300 ℃, just can enter into air and carry out air cooling.
6, air cooling:
In air, utilize fan airflow rapidly work-piece cools to be arrived near normal temperature workpiece.
7, following part section:
When workpiece runs to down the part end, near environment temperature (generally not being higher than 20 ℃ of environment temperatures), and require removal before next intermittent duty arrives, to meet the arrival of next workpiece.
In sum, in case after workpiece (same type) constantly progressively enters each active section successively, just enter into duty completely, it can constantly be worked down length by length according to the technological requirement that you set.
Claims (10)
1. sealed hot-air agitating device for nitrogen-protective soldering furnace; it is characterized in that; comprise soldering body of heater (1) and interior circulating fan (2); the impeller shaft (22) of soldering body of heater (1) and interior circulating fan (2) is connected by pedestal (3); the impeller (21) of interior circulating fan (2) is in the soldering body of heater (1); the impeller shaft (22) that is connected with impeller (21) passes pedestal (3) and links to each other with motor (23); between impeller shaft (22) and pedestal (3), be provided with sealing ring (4); impeller (21) has two-layer blade (211) up and down; (212); upper strata blade (211) is positioned at pipeline (51); lower leave (212) is in outside the pipeline (51), is provided with heating tube (18) in impeller (2) below.
2. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1; it is characterized in that; in soldering body of heater (1), be provided with air channel cage (5); during interior circulating fan (2) work; the air channel is separated the interior wind of cover (5) and is blowed to workpiece (6) from top downwards, the formation circulation thereby upwards flow in outside space by air channel cage (5) again.
3. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1; it is characterized in that; impeller shaft (22) quilt two bearings (71,72) up and down is connected on the pedestal; seal washer (4) is positioned at bearing (71) top; and the pedestal end cap of being located on the pedestal is fixed; wherein top bearing (71) adopts the centripetal thrust force angular contact ball bearing; above bearing, be provided with axle sleeve (9); impeller shaft and auxiliary device thereof are pressed in by axle sleeve (9) on the inner ring of top bearing (71), and the bearing of below is fixing by bearing (ball) cover (82).
4. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1 and 2 is characterized in that, impeller shaft (22) outside also is provided with water collar (10).
5. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1 and 2; it is characterized in that; be provided with nitrogen inlet at the agitating device top, slit and the bearing outer ring side eddy current air drain from impeller shaft (22) between the outside and water collar (10), constantly pour nitrogen with the eddy current form from the top to the impeller direction along the gap of impeller shaft and other parts.
6. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1; it is characterized in that; connect with flange between soldering body of heater (1) and the pedestal (3), scribble the temperature resistant encapsulation that mixes by graphite powder and sodium silicate inorganic bond in the connection seam and fill out mixture.
7. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1 is characterized in that being connected or integral demounting for assembling between impeller (21) and the impeller shaft (22).
8. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1 is characterized in that sealing ring (4) is the oil-containing sealing ring.
9. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1, circulating fan upper and lower two-layer respectively has 4 blades in it is characterized in that, and two-layer impeller is interlaced to be arranged in the rotating shaft; Four impellers of every layer 90 degree at interval are provided with, and the angle of every impeller is 35 degree.
10. sealed hot-air agitating device for nitrogen-protective soldering furnace according to claim 1 is characterized in that also being provided with back blades at the impeller shaft front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100209962A CN100529627C (en) | 2007-04-06 | 2007-04-06 | Sealed hot-air agitating device for nitrogen-protective soldering furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100209962A CN100529627C (en) | 2007-04-06 | 2007-04-06 | Sealed hot-air agitating device for nitrogen-protective soldering furnace |
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| CN101025332A CN101025332A (en) | 2007-08-29 |
| CN100529627C true CN100529627C (en) | 2009-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012158A (en) * | 2010-11-18 | 2011-04-13 | 太仓正信干燥设备科技有限公司 | Progressive stirrer and single cone dryer with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230722B (en) * | 2011-06-16 | 2012-12-19 | 常州先锋干燥设备有限公司 | Cyclone drying and solvent recycling system |
| CN102230719B (en) * | 2011-06-16 | 2012-12-19 | 常州先锋干燥设备有限公司 | Spiral-flow dryer |
| CN102784994B (en) * | 2012-05-24 | 2015-04-22 | 盐城市康杰机械制造有限公司 | Circulating fan of aluminium soldering preheating furnace |
| CN102873421B (en) * | 2012-09-13 | 2015-04-15 | 无锡四方集团真空炉业有限公司 | Vacuum carrier gas aluminum brazing furnace |
| CN102886581B (en) * | 2012-10-26 | 2016-02-03 | 株洲南车时代电气股份有限公司 | A kind of solderer |
| CN105457979A (en) * | 2015-12-25 | 2016-04-06 | 安徽继宏环保科技有限公司 | Electric control equipment of urban household garbage disposal system |
| CN116571831B (en) * | 2023-07-11 | 2023-11-07 | 成都国营锦江机器厂 | Welding tool, system and welding method for engine fuel manifold |
-
2007
- 2007-04-06 CN CNB2007100209962A patent/CN100529627C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012158A (en) * | 2010-11-18 | 2011-04-13 | 太仓正信干燥设备科技有限公司 | Progressive stirrer and single cone dryer with same |
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|---|---|
| CN101025332A (en) | 2007-08-29 |
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Address after: 224056 Jiangsu province Yancheng City District Dragon Street Road No. 9 Qinchuan salt Patentee after: JIANGSU KANGJIE MACHINERY CO., LTD. Address before: 224000 Jiangsu province Yancheng City salt county Fengzhen Pengcheng Yi Road No. 66 Patentee before: Kangjie Mechanical Mfg. Co., Ltd., Yancheng |
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Denomination of invention: Sealed hot-air agitating device for nitrogen-protective soldering furnace Effective date of registration: 20171227 Granted publication date: 20090819 Pledgee: Yancheng City salt capital scientific and Technological Transformation Service Co., Ltd. Pledgor: JIANGSU KANGJIE MACHINERY CO., LTD. Registration number: 2017990001243 |
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