CN203451563U - Isothermal air circulating heat treatment electric furnace - Google Patents
Isothermal air circulating heat treatment electric furnace Download PDFInfo
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- CN203451563U CN203451563U CN201320474552.7U CN201320474552U CN203451563U CN 203451563 U CN203451563 U CN 203451563U CN 201320474552 U CN201320474552 U CN 201320474552U CN 203451563 U CN203451563 U CN 203451563U
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- burner hearth
- isothermal
- heat treatment
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Abstract
The utility model discloses an isothermal air circulating heat treatment electric furnace which mainly comprises a furnace body, a hearth, a hanging basket, a traction system, a control system and a heating element, wherein the heating element is arranged on the inner side wall of the hearth, the top of the hearth is provided with an air blower, a furnace pipe is arranged in the hearth, and the isothermal air circulating heat treatment electric furnace is characterized in that a heat-resisting temperature-homogenizing separation plate is circumferentially arranged between the furnace pipe and the heating element on the inner wall of the heart, an isothermal hot air passage is formed between the temperature-homogenizing separation plate and the furnace pipe through the heating of the heating element, and vanes of the air blower are arranged in a warm air passage on the top of the hearth. Through the measures for controlling the heating of the heating element and arranging the isothermal hot air passage of the stainless steel temperature-homogenizing separation plate, the surface temperature of the heating element is effectively reduced, the temperature gradient between the surface of the heating element and the stainless steel temperature-homogenizing separation plate can be reduced, the temperature gradient between the stainless steel temperature-homogenizing separation plate and the stainless steel furnace pipe can also be reduced, and the temperature homogeneity of the hearth can be improved.
Description
Technical field
The utility model belongs to air cycle Heat Treatment Furnace, relates generally to a kind of isothermal air cycle Heat Treatment Furnace.
Background technology
The heating means of metal heat treatmet air circulating oven mainly contain gas heating and resistive heating, in addition, also have induction heating, microwave heating and aerodynamic force heating etc.The feature of gas heating is energy-saving and cost-reducing outstanding (can save energy 50% left and right), but temperature is wayward, is applicable to the heat treatment process to temperature uniformity less demanding (>=± 5 ℃).The feature of resistive heating is that temperature is easy to control, and is applicable to the have relatively high expectations heat treatment process of (≤± 5 ℃) of temperature uniformity, and shortcoming is that energy consumption is larger.
The principle of heating of existing metal heat treatmet air cycle resistance furnace is to utilize heating element (resistance wire, resistive band or pottery etc.) heating, is aided with hot air circulation convection current, and workpiece is carried out to homogeneous heating.But the factor impacts such as stopping property due to the layout of heating element, the speed of circulation of air and diversion mode and burner hearth, make the homogeneity of furnace temperature be difficult to reach standard-required.Particularly, for large-scale or super-huge air circulating oven, if want, the furnace temperature temperature difference is controlled in smaller scope further difficult.
Along with developing rapidly of the industry such as aerospace and continually developing of novel material, the thermal treatment of large-scale workpiece is more and more higher to the requirement of thermal treatment process and quality, wherein, when thermal treatment, the control of the temperature of burner hearth, uniformity coefficient and precision etc. is become to the important indicator of heat treatment furnace quality.For example, Sinomania process air standard (HB5354-94) to the requirement of first-class stove furnace temperature uniformity coefficient be ± 3 ℃ of (temperature-controlled precision be ± 1 ℃) ，Er Boeing Co.s are ± 2.8 ℃.At present, the uniformity coefficient of domestic and international reasonable air circulating oven furnace temperature is generally that < ± 5 ℃ are arrived in > ± 3 ℃.Obviously, in Design and manufacture thermal treatment air circulating oven process, uniformity coefficient how to control furnace temperature is one of main challenge of facing of relevant scientific and technical personnel.
At present, the air cycle Heat Treatment Furnace that China's space industry is used, main dependence on import equipment.The air cycle quenching furnance of domestic import and the air cycle quenching furnance of domestic production mainly take row method to improve the homogeneity of fire box temperature, heating and hot air circulating system as shown in Figure 1: its agent structure is mainly by body of heater 10, hanging basket 11, suspension bracket 12, tractor 16 and burner hearth, Controlling System etc., on burner hearth surrounding sidewall, be provided with heating unit 1, in burner hearth, surrounding is provided with flue, and roof of the furnace is provided with recirculation blower.It obtains the inhomogeneity principle of the comparatively high temps air that mainly circulation is stirred in burner hearth by recirculation blower and obtains, but, this type of heating still can not meet the requirement of relevant criterion, the essential defect of this heat treatment furnace is: the heat that the circulating air that the insulation in burner hearth mainly relies on the heat transfer of surrounding flue (the stainless steel inwall of burner hearth) to obtain heat and furnace roof obtains, the temperature of circulating air is to rely on heating unit heating that the air themperature rising between burner hearth inner bag and Heating element is obtained, in order to keep the temperature-resistant of burner hearth, just must improve constantly the surface temperature of heating unit, the temperature that could keep burner hearth, because the volume of large-scale air circulating quenching stove has tens cubic meters, the area of furnace roof and furnace bottom is all larger, the thermosteresis of furnace roof and furnace bottom is also just larger, keep the heat of temperature-resistant needs in stove just larger, because it does not have set temperature shim mechanism, this is the temperature raising on the unit's of requirement Heating element surface just, the surface temperature of heating unit is higher, the temperature difference between heating unit and burner hearth inner bag is just larger, the temperature homogeneity of circulating air is just larger, the homogeneity of circulating air directly affects the homogeneity of furnace temperature, has also affected the thermal treatment qualities such as quenching.
Utility model content
The purpose of this utility model is to provide a kind of isothermal air cycle heat treatment furnace, and its many warm areas distribute heating unit is set, and the samming hot-air channel simultaneously forming can improve the temperature homogeneity of burner hearth effectively, improves the thermal treatment qualities such as quenching.
The purpose of this utility model can adopt following technical scheme to realize: it mainly comprises body of heater, burner hearth, hanging basket, jacking system and controller, heating unit, heating unit is arranged on burner hearth inner side-wall, the top of burner hearth is provided with gas blower, in burner hearth, be provided with flue, heat-resisting equal temperature dummy plate is set for one week between flue and the heating unit of inboard wall of burner hearth, by controlling heating unit, generate heat, make to form between equal temperature dummy plate and flue isothermal hot-air channel between the two, the blade of gas blower is positioned at the isothermal hot-air channel of roof of the furnace, the hot blast of isothermal is sent in burner hearth.
Corner at isothermal hot-air channel is circular arc passage.
Described heat-resisting equal temperature dummy plate is stainless steel.
At roof of the furnace and burner hearth bottom, be respectively arranged with for compensating the heating unit of hot blast energy waste.
At the top of burner hearth, be provided with one or more gas blower, the blade of gas blower is positioned at the exit of isothermal hot-air channel, and exit is also provided with hot blast diaphragm.
The described compartment that setting is connected with refractory materials between the heating unit of the different warm areas of inboard wall of burner hearth, be conducive to form different burner hearths, be conducive to subregion and independently control the temperature of single burner hearth, be also just conducive to form the temperature homogeneity of the equal temperature dummy plate of stainless steel itself.
Described jacking system comprises electric motor, guide rail, counterweight, tractor, traction steel wire, guide deflection sheave and electromagnetic brake, electric motor is arranged on body of heater top, it is connected by shaft joint, reduction box and tractor, traction steel wire is arranged in guide deflection sheave, the two ends of traction steel wire connect respectively hanging basket and counterweight, rely on the friction between wireline and traction wheel to drive bracketplant lifting.
The utility model is due to the equal temperature dummy plate of stainless steel heat-resistant being set for one week between flue and the heating unit of inboard wall of burner hearth, the heat that Heating element produces is passed to after the equal temperature dummy plate of stainless steel, because the equal temperature dummy plate of stainless steel has the fast feature of conducting heat, the equal temperature dummy plate of stainless steel can be very fast the heat of differing temps is dispersed in uniformly on the equal temperature dummy plate of whole stainless steel, the equal temperature dummy plate of stainless steel can reach samming very soon, between the equal temperature dummy plate of stainless steel and stainless steel flue, form hot blast temperature in isothermal hot-air channel relatively evenly (≤2.8 ℃), hot blast is conducive to the raising of the temperature homogeneity of burner hearth uniformly.Hot blast temperature in hot blast in whole burner hearth and the isothermal hot-air channel outside burner hearth is even property≤2.8 ℃ all, expedite not stopping circulated, meanwhile, arranged after the temperature compensation of heating unit heating by burner hearth surrounding, in stove and all≤2.8 ℃ of the temperature homogeneities of the outer isothermal hot-air channel of stove.The inhomogeneity formation of hot blast is mainly thermal value by controlling heating unit, the measures such as the equal temperature dummy plate Isothermal Hot of stainless steel wind passage is set in above-mentioned isothermal hot-air channel, effectively reduce the surface temperature of heating unit, reduced the thermograde between heating unit surface and the equal temperature dummy plate of stainless steel, simultaneously, also reduced the thermograde between the equal temperature dummy plate of stainless steel and stainless steel flue, simultaneously, also reduce the thermograde at stainless steel inboard wall of furnace and burner hearth center, thereby improved the temperature homogeneity of burner hearth.
Because burner hearth furnace roof and furnace bottom are provided for respectively compensating the heating unit of hot blast energy waste, energy waste while passing through furnace roof or furnace bottom for compensating isothermal hot blast, by controlling heating unit quantitative heating heat compensation, lose, make through the hot blast temperature of the samming hot-air channel of furnace roof and the hot blast of furnace bottom and the hot blast of burner hearth, burner hearth both sides consistent, hot blast adds after thermal compensation through hot blast energy waste through the samming hot-air channel all around arranging up and down, the hot blast uniformity of the hot blast of samming hot-air channel and burner hearth, the homogeneity of burner hearth improves greatly.
Accompanying drawing explanation
Fig. 1 is existing air cycle Heat Treatment Furnace structural representation.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the isothermal hot air circulation structure schematic diagram in the utility model burner hearth.
Fig. 4 is heating unit distribution schematic diagram.
Fig. 5 is jacking system structural representation of the present utility model.
In figure: 1, heating unit, 2, ceramic fiber cuts off, 3, the equal temperature dummy plate of stainless steel, 4, isothermal hot-air channel, 5, ceramic fiber lagging material, 6, stainless steel flue, 7, recycle blower, 8, hot blast flow apron, 9, arc corners, 10, body of heater, 11, hanging basket, 12, hanging basket frame, 13, controller, 14, split fire door, 15, recirculation blower blade, 16, electric motor, 17, lifting wire rope, 18, speed limiter, 19, speed limiter wire rope, 20, speed limit swelling device, 21, safety tongs, 22, counterweight.
Embodiment
Accompanying drawings specific embodiment of the utility model.
As shown in accompanying drawing 2-5: the utility model mainly comprises body of heater 10, burner hearth, hanging basket 11, jacking system and controller 13, heating unit 1 etc., heating unit 1 is arranged on burner hearth inner side-wall, the top of burner hearth is provided with recycle blower 7, in burner hearth, be provided with stainless steel flue 6, heat-resisting equal temperature dummy plate is set for one week between flue and the heating unit of inboard wall of burner hearth, the present embodiment is the equal temperature dummy plate 3 of stainless steel heat-resistant, by controlling heating unit, generate heat, make to form between equal temperature dummy plate and flue isothermal hot-air channel 4 between the two, recirculation blower blade 15 is positioned at the warm hot-air channel of roof of the furnace.Corner at isothermal hot-air channel is arc corners 9.At roof of the furnace and burner hearth bottom, be respectively arranged with for compensating the heating unit of hot blast energy waste.At the top of burner hearth, be provided with one or more gas blower, the present embodiment is one.The exit that gas blower 7 is positioned at isothermal hot-air channel is provided with hot blast diaphragm.Can make the hot blast in stove enter smoothly in the samming hot-air channel of both sides, the local blast of few formation of trying one's best.
As shown in Figure 3: according to varying in size of burner hearth, can a plurality of gas blowers be evenly set in the different azimuth of burner hearth furnace roof, outlet at gas blower arranges hot blast diaphragm, gas blower can make the hot blast in hot-air channel pass through uniformly hot blast diaphragm, at the turning of hot-air channel, it is arc corners 9, can make hot blast in Isothermal Hot wind passage enter in stove along the uniform plane of furnace roof, the local blast of few formation of trying one's best.This and hot blast naturally upwards wind-force form agitation effects, make the temperature in stove be tending towards uniformity.
As shown in Figure 4, the described compartment being connected with refractory materials that arranges between the heating unit of the different warm areas of inboard wall of burner hearth, be conducive to form different burner hearths, be conducive to subregion and independently control the temperature of single burner hearth, be also just conducive to form the temperature homogeneity of the equal temperature dummy plate of stainless steel itself.
As shown in Figure 5: jacking system utilizes elevator principle to carry out conveying articles.Jacking system is mainly by electric motor 16, guide rail, counterweight 22, tractor, security device (as speed limiter 18, safety tongs 21 and snubber etc.), speed limiter wire rope 19, speed limit swelling device 20 compositions such as grade.Traction rope two ends in succession respectively hanging basket and counterweight 22, be wrapped on traction wheel and guide deflection sheave, traction motor drives traction wheel to rotate after by speed reduction unit speed change, by traction rope and the fricative tractive force of traction wheel, realize the up-and-down movement of hanging basket and counterweight, reach fast lifting object.The boots of leading that are fixed on hanging basket can be along the reciprocal up-and-down movement of fixed guide being arranged on body of heater lifting hoistway column, prevents hanging basket be in operation deflection or swing.Normally closed block brake declutches when electric motor is worked, and makes jacking system running, in dead electricity situation, brakes, and makes hanging basket stop lifting.Hanging basket 11 is parts of delivery thermal treatment article, counterweight be used for balance hanging basket load, reduce motor power (output).Compensation system is used for compensating tension force and the changes in weight in hoist ropes motion, makes traction motor load stable, and hanging basket is able to accurate stop.Electrical system realizes the control to up-and-down movement, completes different quenching shift time requirements simultaneously.Security device guarantees the operating safety of hanging basket.
The function of jacking system is outputting power and transferring power, drives elevator operation, and splits fire door cooperation.Mainly by tractor, haulage cable 17, guide deflection sheave and diversion sheave form.The operation that tractor is hanging basket provides power, by electric motor, and tractor, shaft joint, reduction box, and electromagnetic brake forms.The two ends of traction steel wire connect respectively hanging basket 11 and counterweight, rely on the friction between wireline and traction wheel to drive bracketplant lifting.The effect of guide deflection sheave is the spacing of separating hanging basket and counterweight, adopts after-combustion type to increase and drags gravitation.
Guidance system, by guide rail, is led boots and guide rail bracket and is formed.Its effect is the freedom of movement of restriction hanging basket and counterweight, and hanging basket and counterweight can only be moved up and down along guide rail.
Split fire door system and split fire door, door guide rail bracket, hydraulic unit, the compositions such as sealing-ring, while opening fire door, hydraulic efficiency system first allows fire door be moved down into prescribed position (leaving some distance of sealing-ring), at horizontally openable fire door.
Weight balancing system is comprised of counterweight and weight compensation means.Counterweight forms by counterweight frame with to pouring weight.Counterweight is by balance dead weight of basket and part payload ratings.Weight compensation means is compensation hanging basket, bracketplant frame and is heat-treated article and the device of counterweight side-lining rope capacity variation on the balanced design impact of hanging basket.
Electric drive system is by traction electric machine, power supply system, and speed feedback device, the compositions such as speed regulation device, its effect is that jacking system is carried out to speed control.Traction electric machine is the propulsion source of jacking system, according to the weight configuration of jacking system, can adopt alternating current machine or direct-current machine.Power supply system is that the device of power supply is provided for motor.Rate feedback system is to provide jacking system running speed signal for velocity control system.General velodyne or the speed pulse generator of adopting is connected with motor.Speed regulation device carry out speed control to traction electric machine.
The electric control system of jacking system is by control device, operating device, and leveling device, and lever position indicator etc. partly forms.Wherein control device, according to the operation logic functional requirement of jacking system, is controlled the operation of hanging basket, is arranged on the housing in machine room.Operating device is by the operation of the push-button control jacking system of operator's console.
Safety system comprise machinery with electric various securing systems, can protect the use of jacking system safety.Having of mechanical aspects: speed limiter and safety tongs play overspeed protection effect, snubber rises rushes to summit and hits end provide protection, the limit protection device that cuts off in addition general supply.The safeguard protection of electric aspect has embodiment in each operation link of jacking system.
The utility model does not describe part in detail for prior art.
Claims (7)
1. an isothermal air cycle Heat Treatment Furnace, it mainly comprises body of heater, burner hearth, hanging basket, jacking system and Controlling System, heating unit, heating unit is arranged on burner hearth inner side-wall, the top of burner hearth is provided with gas blower, in burner hearth, be provided with flue, it is characterized in that: heat-resisting equal temperature dummy plate is set for one week between flue and the heating unit of inboard wall of burner hearth, by controlling heating unit, generate heat, make to form isothermal hot-air channel between the two between equal temperature dummy plate and flue, the blade of gas blower is positioned at the warm hot-air channel of roof of the furnace.
2. isothermal air cycle Heat Treatment Furnace according to claim 1, is characterized in that: the corner at isothermal hot-air channel is circular arc passage.
3. isothermal air cycle Heat Treatment Furnace according to claim 1, is characterized in that: heat-resisting equal temperature dummy plate is stainless steel plate.
4. isothermal air cycle Heat Treatment Furnace according to claim 1, is characterized in that: at roof of the furnace and burner hearth bottom, be respectively arranged with for compensating the heating original paper of hot blast energy waste.
5. isothermal air cycle Heat Treatment Furnace according to claim 1, is characterized in that: at the top of burner hearth, be provided with one or more gas blower, the exit that gas blower is positioned at isothermal hot-air channel is provided with hot blast diaphragm.
6. isothermal air cycle Heat Treatment Furnace according to claim 1, is characterized in that: the described compartment being connected with refractory materials that arranges between the heating unit of the different warm areas of inboard wall of burner hearth.
7. isothermal air cycle Heat Treatment Furnace according to claim 1, it is characterized in that: described jacking system comprises and rises electric motor, guide rail, counterweight, tractor, traction steel wire, guide deflection sheave and electromagnetic brake, electric motor is arranged on body of heater top, it is connected by shaft joint, reduction box and tractor, traction steel wire is arranged in guide deflection sheave, the two ends of traction steel wire connect respectively hanging basket and counterweight, rely on the friction between wireline and traction wheel to drive bracketplant lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320474552.7U CN203451563U (en) | 2013-08-06 | 2013-08-06 | Isothermal air circulating heat treatment electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320474552.7U CN203451563U (en) | 2013-08-06 | 2013-08-06 | Isothermal air circulating heat treatment electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203451563U true CN203451563U (en) | 2014-02-26 |
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ID=50131459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320474552.7U Expired - Fee Related CN203451563U (en) | 2013-08-06 | 2013-08-06 | Isothermal air circulating heat treatment electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203451563U (en) |
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2013
- 2013-08-06 CN CN201320474552.7U patent/CN203451563U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20150806 |
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| EXPY | Termination of patent right or utility model |