CN102534147A - Furnace door sealing device of box type protective atmosphere thermal treatment furnace - Google Patents
Furnace door sealing device of box type protective atmosphere thermal treatment furnace Download PDFInfo
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- CN102534147A CN102534147A CN2011104601920A CN201110460192A CN102534147A CN 102534147 A CN102534147 A CN 102534147A CN 2011104601920 A CN2011104601920 A CN 2011104601920A CN 201110460192 A CN201110460192 A CN 201110460192A CN 102534147 A CN102534147 A CN 102534147A
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Abstract
The invention discloses a furnace door sealing device of a box type protective atmosphere thermal treatment furnace. The furnace door sealing device comprises a clamping ring, a driving device, a furnace door flange, a sealing flange and a sealing ring, wherein the driving device is used for driving the clamping ring to rotate; the furnace door flange and the sealing flange are correspondingly arranged on a furnace body and a furnace door; the sealing ring is arranged between the furnace door flange and the sealing flange; the clamping ring is sleeved on the furnace door flange; an inner flange extending radially inwards is arranged on one side, near the furnace body, of the clamping ring; holding flanges extending radially inwards and distributed annularly and uniformly are arranged on one side, near the furnace door, of the clamping ring; compressing building blocks matched with the holding flanges are arranged on the sealing flange; a compressing inclined surface used for being matched with each compressing building block when the furnace door is closed is arranged on the side, facing each holding flange, of the compressing building block; and the mechanical angle of the compressing building block is less than or equal to that of a gap between the adjacent holding flanges. The furnace door sealing device has stable and reliable sealing property and can adopt various types of protective atmosphere in the furnace. The products subjected to thermal treatment can be decarbonized without oxidation.
Description
Technical field
The present invention relates to a kind of furnace door sealing device, concrete is a kind of box protective atmosphere heat treatment furnace furnace door sealing device.
Background technology
Heat treatment furnace is to be used for metal works is carried out the general designation of the industrial furnace of various metal heat treatmets, and heat treatment furnace can adopt the type of furnace of various process furnace, but requires more strictly to control furnace temperature and furnace atmosphere etc.Box heat treatment furnace is widely used a kind of periodical furnace in the metal heat treatmet; In the process of in adopting box heat treatment furnace, heat-treating, oven door sealing property difference not only can cause the heat in the stove to run off from fire door easily, makes whole heat treatment cycle time lengthening; Cause energy dissipation; And make and often not reach the temperature of setting near the material temperature of door side, make the poor temperature uniformity in the whole burner hearth, cause the metal heat treatmet effect not reach design requirements.
Present box heat treatment furnace generally adopts the sealed structure of hilted broadsword formula, has only one deck sealing-ring, and fire door is provided with chilled water unit, has increased the weight of fire door weight, and chilled water unit often do not reach the cooling performance of expection, but is easy to cause the fire door distortion.To fire door compress also that just design has a downward bending-like toward the headwall direction at the guide rail place, lean on the deadweight of fire door to make the fire door roller clip inside the track of bending, if when furnace pressure is higher, be easy to make fire door to unclamp once more.
The patent No. is that the Chinese patent of CN200910182529.9 discloses a kind of furnace door sealing device that is applicable to box heat treatment furnace; This is applicable to the furnace door sealing device of box heat treatment furnace, and fire door is welded with the band steel that is parallel to each other in headwall steel plate upper edge; Form the interior sealing groove and the outer gland sealing groove of spill, all be filled with sealing-ring in said interior sealing groove and the outer gland sealing groove; With said in the sealing groove fire door relative with the outer gland sealing groove be provided with the steel plate of protrusion fire door internal surface, sealing cutter and outer gland sealing cutter in forming saidly interiorly seal cutter and interior sealing groove matches, said outer gland sealing cutter and outer gland sealing groove match; On the headwall steel plate, also be welded with track, be provided with in the said track and supply fire door roller vertical guide slot that moves up and down and the horizontal guide groove that supplies the fire door roller to seesaw, the bottom of said vertical guide slot is connected transition with horizontal guide groove; In addition, fore-and-aft direction is welded with horizontal channel-section steel in headwall steel plate upper edge, has long straight hole on the channel-section steel, and the direction of long straight hole is parallel to the direction that fire door seesaws; Cylinder also is installed on the headwall steel plate, and cylinder is parallel with channel-section steel arranges side by side, and the end of said cylinder piston rod connects grip rails, and an end of said grip rails is straight-through up and down bathtub construction, and the other end of grip rails places the long straight hole of channel-section steel; On fire door, also convex with briquetting, said briquetting embeds in the straight-through up and down groove of grip rails.
Though this be applicable to the furnace door sealing device of box heat treatment furnace adopted inside and outside two-layer sealed structure; Can satisfy the seal request of heat treatment furnace to a certain extent; But because the fire door roller will roll between vertical guide slot and horizontal guide groove; Certainly exist certain clearance between fire door roller and the guide groove, and then cause the inner and outer sealing cutter can not well compress the sealing-ring in the inner and outer sealing groove; In like manner, slide up and down necessary gap, cause sealing property not enough owing to also exist between briquetting on the fire door and the grip rails.
Given this; The present invention is intended to propose a kind of box protective atmosphere heat treatment furnace furnace door sealing device; This box protective atmosphere heat treatment furnace furnace door sealing device is not only simple in structure, and it is convenient to implement, and sealing property is more reliable and more stable; Can in stove, adopt the various ways protective atmosphere, accomplish the decarburization of heat treated article non-oxidation.
Summary of the invention
The technical problem that the present invention will solve is to propose a kind of box protective atmosphere heat treatment furnace furnace door sealing device; This box protective atmosphere heat treatment furnace furnace door sealing device is not only simple in structure; It is convenient to implement; And sealing property is more reliable and more stable, can in stove, adopt the various ways protective atmosphere, accomplishes the decarburization of heat treated article non-oxidation.
Realize above-mentioned technical purpose; Box protective atmosphere heat treatment furnace furnace door sealing device of the present invention; Comprise compacting ring, be used to drive the drive unit of said compacting ring rotation, correspondingly respectively be arranged on fire door flange and the tongued and grooved flanges on said body of heater and the fire door; And be arranged on the sealing-ring between said fire door flange and the tongued and grooved flanges; Said compacting ring is sleeved on the said fire door flange; And said compacting ring is provided with the inward flange that extends radially inwardly near said body of heater one side, and said compacting ring is provided with the press flange that extends radially inwardly and be uniformly distributed with ringwise near fire door one side, said tongued and grooved flanges be provided with the Ya Jin that matches with said press flange ?piece; Said Ya Jin ?piece be provided with towards the side of said press flange and be used for the inclined-plane that compresses that fire door matches with said press flange when airtight, and said Ya Jin ?the shared mechanical angle of piece smaller or equal to the shared mechanical angle in space between the said adjacent press flange.
Further; Be equipped with carriage between said inward flange and the said fire door flange and between said press flange and the said tongued and grooved flanges, said carriage comprises bearing mount pad that is fixedly mounted on said inward flange and the said press flange and the rolling bearing that is installed in the said bearing mount pad.
Further, on said each press flange at least two carriages are installed, and the carriage that is installed on the said inward flange is uniformly distributed with setting ringwise.
Further, be provided with rolling body spherical in shape between said fire door flange and the said compacting ring, be respectively equipped with the chute that matches with said rolling body on the periphery wall of said fire door flange and the said compacting ring internal perisporium.
Further; Said drive unit is the cylinder that is installed between said body of heater and the compacting ring; Said compacting ring rotates under the effect of cylinder, and the compacting ring rotation angle range is more than or equal to the shared mechanical angle sum in gap between shared mechanical angle of said press flange and adjacent two press flange.
Further; Said drive unit be the swing pinion that is installed in electric motor I on the said body of heater, rotates synchronously with the electric motor I output shaft and be installed on the said compacting ring and with the toothed segment of this swing pinion engagement, and the central angle of said toothed segment is more than or equal to the shared mechanical angle sum in gap between shared mechanical angle of said press flange and adjacent two press flange.
Further, the shared mechanical angle in gap equals the shared mechanical angle of said press flange between the said adjacent press flange.
Further, said fire door flange face to a side of said body of heater corresponding with said sealing-ring be provided with water jacket.
Beneficial effect of the present invention is:
1, box protective atmosphere heat treatment furnace furnace door sealing device of the present invention is when fire door is closed, the door opened device that carries through heat treatment furnace will be installed on the oven door sealing flange Ya Jin ?piece be positioned to the position, space between adjacent two press flange on the compacting ring; Utilize drive unit drive pressure collar rotation then; Make Ya Jin ?piece place in the press flange; And press flange is pressed in compress on the inclined-plane; Press flange makes tongued and grooved flanges compress to the snap-in force of tongued and grooved flanges effect and is arranged on the sealing-ring between fire door flange and the tongued and grooved flanges, realizes that fire door is airtight;
The opening process and the said process of fire door are opposite;
Because box protective atmosphere heat treatment furnace furnace door sealing device of the present invention directly adopts the snap-in force between compacting ring and the tongued and grooved flanges to realize sealing; Snap-in force can be enough big, can realize the sealing of ppm level, in addition; Very close to each other between the stressed member of the box protective atmosphere heat treatment furnace of the present invention furnace door sealing device; In the whole work-piece heat treatment process, furnace door sealing device all can not become flexible, and sealing property is more stable; Can in stove, adopt the various ways protective atmosphere, accomplish the decarburization of heat treated article non-oxidation;
2, through being equipped with carriage between inward flange and the fire door flange and between press flange and the tongued and grooved flanges, can reduce the rotational resistance of compacting ring, and prevent to produce between compacting ring and tongued and grooved flanges and the fire door flange wearing and tearing;
3, through between compacting ring and fire door flange, the spheric rolling body being set, reduce the compacting ring rotational resistance;
4, through water jacket coolant seal circle is set, can effectively increase the work-ing life of sealing-ring.
Description of drawings
Fig. 1 is the box protective atmosphere heat treatment furnace of a present invention furnace door sealing device example structure synoptic diagram;
Fig. 2 be fire door airtight before press flange and Ya Jin ? location diagram between the piece;
Fig. 3 be fire door when airtight press flange and Ya Jin ? location diagram between the piece;
Fig. 4 is for adopting the box protective atmosphere heat treatment furnace structural representation of the box protective atmosphere heat treatment furnace of present embodiment furnace door sealing device;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the furnace binding synoptic diagram of box protective atmosphere heat treatment furnace;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is the outside track and the cross track structural representation of box protective atmosphere heat treatment furnace;
Fig. 9 is the door structure synoptic diagram of box protective atmosphere heat treatment furnace;
Figure 10 is the left view of Fig. 9.
Description of reference numerals:
The 1-body of heater; The 2-fire door; The 3-structure of feeding; The 4-compacting ring; The 4a-inward flange; The 4b-press flange; 5-fire door flange; The 6-tongued and grooved flanges; The 7-sealing-ring; 8-Ya Jin ?piece; 8a-compresses the inclined-plane; 9-fire door support bar; The 10-rotating lever; The 10a-cross bar; The 10b-montant; 11-bearing mount pad; The 12-rolling bearing; The 13-rolling body; The 14-swing pinion; The 15-toothed segment; The 16-transmitting gear; The 17-output gear; The 18-water jacket; The 19-trolley track; The 19a-outside track; The 19b-inner orbit; The 19c-cross track; The 20-chassis; 21-chassis base plate; The 22-charging platform; The 23-hydro-cylinder; 24-workpiece pillar; 25-roller I; 26-jack-up inclined-plane; 27-roller II; The 28-box-type shell; The 29-flue; The 30-burner hearth; The 31-ventilating duct; The 32-recirculation blower; 33-motor II I.
Embodiment
Elaborate below in conjunction with the accompanying drawing specific embodiments of the invention.
As shown in Figure 1, be the box protective atmosphere heat treatment furnace of the present invention furnace door sealing device example structure synoptic diagram.The box protective atmosphere heat treatment furnace furnace door sealing device of present embodiment; Comprise compacting ring 4, be used to drive the drive unit of said compacting ring 4 rotations, corresponding fire door flange 5 and the tongued and grooved flanges 6 that is arranged on said body of heater 1 and the fire door 2 respectively; And be arranged on the sealing-ring 7 between said fire door flange 5 and the tongued and grooved flanges 6, and fire door flange 5 is fixedly mounted on the body of heater 1, and tongued and grooved flanges 6 is fixedly mounted on the fire door 2; Offer sealing groove on the fire door flange 5, sealing-ring 7 is installed in the sealing groove 7.Preferably; Said fire door flange 5 towards a side of said body of heater 1 and said sealing-ring 7 corresponding be provided with water jacket 18; Through the temperature that water jacket 18 can coolant seal circle 7 is set, make the longer service life of sealing-ring 7, the sealing-ring 7 of present embodiment adopts silicone rubber O-rings.
Compacting ring 4 is sleeved on the said fire door flange 1; And said compacting ring 4 is provided with the inward flange 4a that extends radially inwardly near body of heater 1 one sides; Said compacting ring 4 is provided with the press flange 4b that extends radially inwardly and be uniformly distributed with ringwise near fire door 2 one sides; Said tongued and grooved flanges 6 be provided with the Ya Jin that matches with said press flange 4b ?piece 7; Said Ya Jin ?piece 8 be provided with towards the side of said press flange 4b be used for that fire door 2 matches with said press flange 4b when airtight compress inclined-plane 8a, and said Ya Jin ?the shared mechanical angle of piece 8 smaller or equal to the shared mechanical angle in gap between the said adjacent press flange 4b.It is 12 press flange 4b that center annular is uniformly distributed with that present embodiment is provided with fire door 2 centers, corresponding, Ya Jin ?piece 8 also corresponding be set to 12.For guarantee Ya Jin ?piece 8 working accuracy Ya Jin ?the tongued and grooved flanges 6 of piece 8 and fire door 2 be the split setting; The Ya Jin that precision work is accomplished ?piece 8 be installed on the tongued and grooved flanges 6 through bolt; Tongued and grooved flanges 6 can not occur because welding and the distortion that causes, guarantee Ya Jin ?piece 8 compress the quality of fit between inclined-plane 8a and the press flange 4b.
The box protective atmosphere heat treatment furnace furnace door sealing device of present embodiment; When fire door 2 was closed: the door opened device that at first utilizes heat treatment furnace to carry lifted fire door 2 to fire door flange 5 places, and will be installed on the oven door sealing flange 6 Ya Jin ?piece 8 be positioned to the position, space between the adjacent two press flange 4b on the compacting ring 4; Utilize drive unit drive pressure collar 4 rotations then; Make Ya Jin ?piece 8 place in the press flange 4b; And press flange 4b is pressed in compress on the inclined-plane 8a; Making tongued and grooved flanges 6 compress to the snap-in force of tongued and grooved flanges 6 effect is arranged on the sealing-ring 7 between fire door flange 5 and the tongued and grooved flanges 6, realizes that fire door 2 is airtight, as shown in Figures 2 and 3.
The opening process and the said process of fire door 2 are opposite, earlier through drive unit drive pressure collar 4 reverse rotations, make press flange 4b and Ya Jin ?piece 8 disengagings, promptly furnace door sealing device unclamps, and utilizes door opened device that fire door 2 is lifted to body of heater 1 one sides then.
Because the box protective atmosphere heat treatment furnace furnace door sealing device of present embodiment directly adopts the snap-in force between compacting ring 4 and the tongued and grooved flanges 6 to realize sealing, snap-in force can be enough big, can realize the sealing of ppm level; In addition, very close to each other between the stressed member of present embodiment furnace door sealing device, in the whole work-piece heat treatment process; Furnace door sealing device all can not become flexible; Sealing property is more stable, can in heat treatment furnace, adopt the various ways protective atmosphere, like N
2, NH
3And H
2Deng, accomplish the decarburization of heat treated article non-oxidation.
Further; Be equipped with carriage between said inward flange 4a and the said fire door flange 5 and between said press flange 4b and the said tongued and grooved flanges 6, said carriage comprises bearing mount pad 11 that is fixedly mounted on said inward flange 4a and the said press flange 4b and the rolling bearing 12 that is installed in the said bearing mount pad 11.Through being equipped with carriage between inward flange 4a and the fire door flange 5 and between press flange 4b and the tongued and grooved flanges 6, can reduce the rotational resistance of compacting ring 4, and prevent to produce between compacting ring 4 and tongued and grooved flanges 6 and compacting ring 4 and the fire door flange 5 wearing and tearing.
Preferably; It is that center annular is uniformly distributed with setting that present embodiment is arranged on the center that the carriage on the inward flange 4a is with compacting ring 4; And be equipped with at least two carriages on each press flange 4b; The compacting ring 4 that adopts this structure and carriage can guarantee compacting ring 4 in rotary course stressed evenly, spin stabilization, and make the snap-in force uniform distribution that tongued and grooved flanges 6 is received.Each press flange 4b of present embodiment is provided with 2 carriages, makes press flange 4b can and compress and produces the isostatic snap-in force between the inclined-plane 8a.
Further, preferred, be provided with rolling body spherical in shape 13 between said fire door flange 5 and the said compacting ring 4, be respectively equipped with the chute that matches with said rolling body 13 on the periphery wall of said fire door flange 5 and said compacting ring 4 internal perisporiums.Through between compacting ring 4 and fire door flange 5, spheric rolling body 13 being set, can reduce compacting ring 4 rotational resistances.
Further; Said drive unit can adopt various ways: drive unit can be for being installed in the cylinder between said body of heater 2 and the compacting ring 4; Cylinder action is positioned on the tangential direction of compacting ring 4 in the power on the compacting ring 4; Said compacting ring 4 rotates under the effect of cylinder, and compacting ring 4 rotation angle ranges are more than or equal to the shared mechanical angle sum in gap between shared mechanical angle of said press flange 4b and the adjacent two press flange 4b; Drive unit can also for be installed in electric motor I, the swing pinion 14 on the said body of heater 2 and be installed on the said compacting ring 4 and with the toothed segment 15 of these swing pinion 14 engagements; And the central angle of said toothed segment 15 is more than or equal to the shared mechanical angle sum in gap between shared mechanical angle of said press flange 4b and the adjacent two press flange 4b; Guarantee to press tight ?piece 8 can with press flange 4b between when fire door is airtight compression fit and when door opened, separating; 14 rotations of electric motor I driven in rotation gear; And drive toothed segment 15 rotations, and then drive pressure collar 4 rotations.The drive unit of present embodiment adopts second kind of structure, makes that compacting ring 4 rotations are more reliable and more stable.
Preferably; The shared mechanical angle in gap equals the shared mechanical angle of said press flange 4b between the adjacent press flange 4b of the box protective atmosphere heat treatment furnace of present embodiment furnace door sealing device; Adopt the compacting ring 4 of this structure; Can provide enough installation to bit space for pressing tight ?piece 8 between the adjacent press flange 4b, and press tight ?piece 8 can be provided with the same with press flange 4b longly, promptly press flange 4b with press the length of fit of tight ?piece 8 when fire door is airtight can be longer; Compressing inclined-plane 8a can be milder, increases stability and the safety of furnace door sealing device in seal process.
Like Fig. 4 and shown in Figure 5; For adopting the box protective atmosphere heat treatment furnace structural representation of the box protective atmosphere heat treatment furnace of the present invention furnace door sealing device; This box protective atmosphere heat treatment furnace comprises body of heater 1, fire door 2 and feeder 3, and furnace door sealing device of the present invention is arranged between body of heater 1 and the fire door 2; Be used in heat treatment of workpieces process and isolate from outer air, and also be provided with door opened device between body of heater 1 and the fire door 2.
The door opened device of this box protective atmosphere heat treatment furnace comprises that rotation is installed in fire door support bar 9 on the said body of heater 1, the rotating lever 10 that is connected with fire door 2 with said fire door support bar 9 respectively and is used to drive said rotating lever 10 rotations and said fire door is lifted to the transmission rig of body of heater 1 one sides.Transmission rig comprises electric motor I I, be fixedly mounted on the transmitting gear 16 on the said motor output shaft and be fixedly mounted on the said fire door support bar 9 and with the output gear 17 of said transmitting gear 16 engagements.Electric motor I I drives transmitting gear 16 rotations, and then drives output gear 17 and 9 rotations of fire door support bar, and utilizes rotating lever 10 lifting fire doors 2 to move, and realizes that fire door 2 opens and closes.
The rotating lever 10 of present embodiment comprises cross bar 10a and montant 10b two portions; Cross bar 10a is fixedly connected with fire door support bar 9; Montant 10b is hinged in the fire door 2 in the heart, and cross bar 10a and montant 10b be hinged and connected, and also is provided with the limitting casing that is used to limit montant 10b rotating range on the fire door 2.The door opened device that adopts this structure can allow fire door 2 suitably swing all around in the process of opening fire door 2 and airtight fire door 2, make things convenient for fire door 2 to open and close, and operates more flexible.
Through fire door support bar 9 and rotating lever 10 are set on door opened device, under the effect of transmission rig, make rotating lever 10 rotate; Rotating lever 10 lifting fire door rotations; Realize the switching function of fire door 2, not only simple in structure, it is convenient to implement; Adopt the door opened device unlatching fire door of this structure can not interfere with furnace door sealing device; If adopt traditional fire door vertical lift type opening device, can interfere between tongued and grooved flanges 6 and the compacting ring 4, therefore traditional door opened device of vertical lift type can not be applicable to the box protective atmosphere heat treatment furnace of present embodiment.
Further; As shown in Figure 8; The feeder of this box protective atmosphere heat treatment furnace comprises trolley track 19 and the chassis 20 that cooperates with said trolley track 19; Said chassis 20 comprises chassis base plate 21, the charging platform 22 that is used to feed and the jacking system that is used for the said charging platform 22 of jack-up, and said jacking system comprises the hydro-cylinder 23 that links to each other with said charging platform 22 and is installed on chassis base plate 21 and the charging platform 22 and is used for upwards supporting the supporting structure of charging platform 22.Said trolley track 19 comprises outside track 19a and the corresponding inner orbit 19b that is arranged on said body of heater 1 bottom with said outside track 19a that is arranged on outside the said body of heater 1; And said body of heater 1 bottom also is provided with workpiece pillar 24, and the height of said workpiece pillar 24 is higher than by the 22 bottom surface height of the charging platform before the jack-up and is lower than by the 22 bottom surface height of the charging platform after the jack-up.
Supporting structure can adopt multiple structure: supporting structure can be hinged on the support bar on chassis base plate 21 and the charging platform 22 for the compartment of terrain, and when charging platform 22 was made progress jack-up, what support bar tilted was installed between chassis base plate 21 and the charging platform 22; Supporting structure can also be for being installed in the roller I 25 on the said charging platform 22 and being installed on the said chassis base plate 21 and the jack-up skewback that matches with said roller I 25 at interval, and the jack-up skewback is provided with jack-up inclined-plane 26.The supporting structure of present embodiment adopts second kind of structure, and under the thrust of hydro-cylinder 23, roller I 25 is pressing jack-up inclined-plane 26 to move upward, and make progress jack-up charging platform 22 and workpiece.
Adopt the feeder of present embodiment, at when filling with substance, fire door 2 is opened, and workpiece is placed on the charging platform 22; And with jacking system with the workpiece jack-up that makes progress, chassis moves forward, and gets into and put in place on the inner orbit 19b of bottom of furnace body; After chassis 20 was advanced and put in place, jacking system put down charging platform 22 downwards, and workpiece drops on the workpiece pillar 24; Withdraw from chassis 20, close fire door 2, i.e. charging is accomplished.During discharging, open fire door 2 earlier, after chassis 20 gets into bodies of heater 1 inside, jack-up workpiece upwards, chassis 20 withdraws from body of heater 1, move to unloading station after, workpiece is put down.Directly feed and discharging through chassis 20, not only convenient and strength-saving, and also efficient is high, is convenient to implement.
As shown in Figure 8; Trolley track 19 also comprises the cross track 19c that intersects and be arranged on said outside track 19a bottom with said outside track 19a; Said outside track 19a bottom is provided with the roller II 27 that matches and cooperate with said cross track 19c, and the outside track 19a of present embodiment is vertical with cross track 19c.Through cross track 19c is set; Make chassis 20 to move, promptly during the work-handling material, can realize moving on three mutually perpendicular directions along the direction of outside track 19a; Not only the loading and unloading material is convenient; Efficient is high, and same chassis 20 and outside track 19a can satisfy the production user demand of a plurality of heat treatment furnaces simultaneously, practices thrift implementation cost.
Like Fig. 6 and shown in Figure 7; Said body of heater 1 comprises box-type shell 28 and flue 29; Surround burner hearth 30 between said box-type shell 28 and the said flue 29; The said flue 29 outer ventilating ducts 31 that are provided with, said flue 29 rear sides are provided with the recirculation blower 32 that is installed in the said ventilating duct 31, adopt the water cooled seal structure between said recirculation blower 32 and the said box-type shell 28 and are arranged on said box-type shell 28 outside electric motor I II 33 and link to each other.Preferably; 30 liang of upper lateral parts of said burner hearth are provided with heating system, and 30 liang of side lower parts of said burner hearth are provided with fume exhaust system, and said heating system is a burner formula heating unit; Said burner is for adopting the inferior high combustion rate burner of instrument control; The combustion air preheater is installed in the said heating flue, but fuel saving not only, and be convenient to adopt instrument accurately to control temperature in the stove.
Through ventilating duct 31 and recirculation blower 32 are set, be used for the gas stream in the stove circulation, can obtain better temperature uniformity; Heating system is employed in the top heating unit is set; The bottom is provided with fume exhaust system, and the combustion air preheater is installed in heating flue, can fuel saving; Heating unit adopts the inferior high combustion rate burner of large and small fire control, guarantees temperature uniformity through big flow recirculation blower, and adopts instrument automation control, guarantees the accuracy and the stability of temperature control system.
Preferably, all be filled with heat-insulation material in said box-type shell 28 and the fire door 2, said heat-insulation material adopts high-purity pure aluminium silicate, can effectively completely cut off furnace high-temperature.
Preferably, also comprise electric control system, said electric control system comprises electrical control system that is electrically connected with said motor I, motor II and motor II I 33 respectively and the temperature control system that is electrically connected with said inferior high combustion rate burner control instruments.Through electric control system is set, can in the heat treatment of workpieces flow process, realize control automatically, time when accurately controlling heat treatment of workpieces and furnace temperature.
The flow process that adopts above-mentioned box protective atmosphere heat treatment furnace to carry out heat treatment of workpieces is following: and chassis 20 moves to 2 mouthfuls at fire door-open fire door 2-chassis 20 at charging bit-charging-chassis 20 and drives body of heater 1 into workpiece is placed in the stove-and chassis 20 withdraws from-closes fire door 2-and start recirculation blower 32-and open the protection gas-setting technology-startup heating-completion heat tracing process of cooling-fire door 2-chassis 20 of coming out of the stove-open and drive into-workpiece jack-up-chassis 20 is withdrawed from-moves to discharging position.This box protective atmosphere heat treatment furnace can be applicable to: coil first Spheroidizing Annealing, the softening return of goods, recrystallization annealing; The normalizing that bearing steel steel pipe, bar get, annealing thermal treatment; The thermal treatment process such as annealing of steel alloy silver optical wand, silver steel, high-accuracy rod member.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. box protective atmosphere heat treatment furnace furnace door sealing device; It is characterized in that: comprise compacting ring, be used to drive the drive unit of said compacting ring rotation, correspondingly respectively be arranged on fire door flange and the tongued and grooved flanges on said body of heater and the fire door; And be arranged on the sealing-ring between said fire door flange and the tongued and grooved flanges; Said compacting ring is sleeved on the said fire door flange; And said compacting ring is provided with the inward flange that extends radially inwardly near said body of heater one side; Said compacting ring is provided with the press flange that extends radially inwardly and be uniformly distributed with ringwise near fire door one side; Said tongued and grooved flanges be provided with the Ya Jin that matches with said press flange ?piece, said Ya Jin ?piece be provided with towards the side of said press flange and be used for the inclined-plane that compresses that fire door matches with said press flange when airtight, and said Ya Jin ?the shared mechanical angle of piece smaller or equal to the shared mechanical angle in space between the said adjacent press flange.
2. box protective atmosphere heat treatment furnace furnace door sealing device according to claim 1; It is characterized in that: be equipped with carriage between said inward flange and the said fire door flange and between said press flange and the said tongued and grooved flanges, said carriage comprises bearing mount pad that is fixedly mounted on said inward flange and the said press flange and the rolling bearing that is installed in the said bearing mount pad.
3. box protective atmosphere heat treatment furnace furnace door sealing device according to claim 2 is characterized in that: on said each press flange at least two carriages are installed, and the carriage that is installed on the said inward flange is uniformly distributed with setting ringwise.
4. according to claim 2 or 3 described box protective atmosphere heat treatment furnace furnace door sealing devices; It is characterized in that: be provided with rolling body spherical in shape between said fire door flange and the said compacting ring, be respectively equipped with the chute that matches with said rolling body on the periphery wall of said fire door flange and the said compacting ring internal perisporium.
5. box protective atmosphere heat treatment furnace furnace door sealing device according to claim 1; It is characterized in that: said drive unit is the cylinder that is installed between said body of heater and the compacting ring; Said compacting ring rotates under the effect of cylinder, and the compacting ring rotation angle range is more than or equal to the shared mechanical angle sum in gap between shared mechanical angle of said press flange and adjacent two press flange.
6. box protective atmosphere heat treatment furnace furnace door sealing device according to claim 1; It is characterized in that: said drive unit be the swing pinion that is installed in electric motor I on the said body of heater, rotates synchronously with the electric motor I output shaft and be installed on the said compacting ring and with the toothed segment of this swing pinion engagement, and the central angle of said toothed segment is more than or equal to the shared mechanical angle sum in gap between shared mechanical angle of said press flange and adjacent two press flange.
7. according to claim 5 or 6 described box protective atmosphere heat treatment furnace furnace door sealing devices, it is characterized in that: the shared mechanical angle in gap equals the shared mechanical angle of said press flange between the said adjacent press flange.
8. box protective atmosphere heat treatment furnace furnace door sealing device according to claim 1 is characterized in that: said fire door flange face to a side of said body of heater corresponding with said sealing-ring be provided with water jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110460192.0A CN102534147B (en) | 2011-12-31 | 2011-12-31 | Furnace door sealing device of box type protective atmosphere thermal treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110460192.0A CN102534147B (en) | 2011-12-31 | 2011-12-31 | Furnace door sealing device of box type protective atmosphere thermal treatment furnace |
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| CN102534147B CN102534147B (en) | 2014-02-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104878175A (en) * | 2015-05-20 | 2015-09-02 | 常州大学 | Self-sealing device of atmosphere control heat treatment furnace |
| CN105624385A (en) * | 2016-03-17 | 2016-06-01 | 河南省天利工业炉有限公司 | Variable-capacity furnace door sealing structure for trolley-type gas furnace |
| CN108085476A (en) * | 2018-01-23 | 2018-05-29 | 江苏石川岛丰东真空技术有限公司 | A kind of vacuum tempering furnace and Equipment for Heating Processing |
| CN108458590A (en) * | 2018-05-25 | 2018-08-28 | 河南龙成煤高效技术应用有限公司 | A kind of high warm tube plate sealing mechanism and rotary kiln |
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| CN108085476A (en) * | 2018-01-23 | 2018-05-29 | 江苏石川岛丰东真空技术有限公司 | A kind of vacuum tempering furnace and Equipment for Heating Processing |
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| CN108458590A (en) * | 2018-05-25 | 2018-08-28 | 河南龙成煤高效技术应用有限公司 | A kind of high warm tube plate sealing mechanism and rotary kiln |
| CN108458590B (en) * | 2018-05-25 | 2023-09-19 | 河南龙成煤高效技术应用有限公司 | High-temperature tube plate sealing mechanism and rotary kiln |
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