CN115341084A - Heat treatment furnace - Google Patents
Heat treatment furnace Download PDFInfo
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- CN115341084A CN115341084A CN202211126783.9A CN202211126783A CN115341084A CN 115341084 A CN115341084 A CN 115341084A CN 202211126783 A CN202211126783 A CN 202211126783A CN 115341084 A CN115341084 A CN 115341084A
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- furnace
- trolley
- heat
- furnace body
- heat treatment
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 80
- 238000004321 preservation Methods 0.000 claims abstract description 55
- 229920000742 Cotton Polymers 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 239000011491 glass wool Substances 0.000 claims 1
- 210000002268 wool Anatomy 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 7
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 241000283216 Phocidae Species 0.000 description 5
- 239000011449 brick Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000007669 thermal treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/32—Casings
- F27B9/34—Arrangements of linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
Abstract
The invention relates to a heat treatment furnace, wherein the bottom of a furnace body is communicated with an opening, four side walls and the top of the furnace body are provided with fireproof and heat-insulating furnace linings, and a heating device is arranged at the top of the furnace body; the lifting platform is positioned under the furnace body and used for lifting the trolley in the furnace body, and the edge of the trolley is in clearance fit with the furnace lining when the trolley lifts in the furnace body; the top of the furnace body is also provided with a distance meter for measuring the distance H between the upper surface of the trolley and the furnace top, and the control system measures the top height H of the workpiece on the trolley in advance according to the H 0 Controlling the lifting platform to enable the distance H = H-H between the top end of the workpiece and the furnace top 0 Is 30-60cm; side of furnace bodyThe wall is provided with a plurality of vertical sliding rails with sealed lower ends, the heat preservation frame slides along the sliding rails, the inner edge of the heat preservation frame can be lapped with all edges of the trolley, and the lapping length is 10-30cm; the heat preservation frame comprises a frame body with the self weight not less than 30kg and heat insulation fireproof cotton with the thickness of 2-10cm, wherein the heat insulation fireproof cotton is arranged below the frame body.
Description
Technical Field
The invention relates to the field of heat treatment equipment, in particular to a heat treatment furnace with low maintenance cost and good energy-saving effect.
Background
Heat treatment is an important process measure for improving various properties of metal, and a heat treatment furnace is necessary equipment for heat treatment.
The traditional heat treatment furnace is in a box type, workpieces horizontally enter and exit, and the box body is provided with a furnace door. In order to adapt to workpieces with different sizes, the size of the box body is generally designed to be larger. When the heat treatment furnace is used, on one hand, the whole furnace body is required to be heated when the size of a workpiece is small due to the large box body, and the heating space cannot be flexibly adjusted according to the size of the workpiece, so that energy consumption and cost are increased; on the other hand, mechanical collision of the furnace door in the using process and when the trolley enters and exits, and deformation of the furnace door under the action of long-term thermal stress often occur under the condition of untight sealing after long-term use, so that excessive heat dissipation in the heat treatment process is realized, the energy consumption is increased, and meanwhile, the maintenance and replacement cost of the furnace door is higher. By combining the defects, the traditional heat treatment furnace has the technical problems of high energy consumption cost and high maintenance cost, and brings great challenges to the production and operation of enterprises.
Based on the problems, the heat treatment furnace is low in maintenance cost and good in energy-saving effect.
Disclosure of Invention
The invention provides a heat treatment furnace, which can adjust the heating space according to the size of a workpiece, effectively reduce energy consumption, realize heat insulation by adopting heat-insulating fireproof cotton, prevent heat dissipation in the heat treatment process, and simultaneously has lower cost of the heat-insulating fireproof cotton, thereby being beneficial to reducing energy consumption cost and maintenance cost.
The heat treatment furnace comprises a furnace body, a trolley and a lifting platform; the bottom of the furnace body is communicated with the opening, the four side walls and the top of the furnace body are provided with fireproof and heat-insulating furnace linings, and the heating device is arranged at the top of the furnace body; the lifting platform is positioned under the furnace body and used for controlling the lifting of the trolley in the furnace body, and when the trolley is lifted in the furnace body, the edge of the trolley is in clearance fit with the furnace lining; the top of the furnace body is also provided with a distance meter for measuring the distance H between the upper surface of the trolley and the furnace top, and the control system measures the top height H of the workpiece on the trolley in advance according to the distance H and 0 controlling the movement of the lifting platform toThe distance H = H-H between the top end of the workpiece and the furnace top 0 Is 30cm-60cm; a plurality of vertical slide rails are arranged on the side wall of the furnace body, a seal is arranged at the bottom ends of the slide rails, the heat-insulating frame slides along the slide rails, the inner edge of the heat-insulating frame can be lapped with all edges of the trolley, and the lapping length is 10cm-30cm; the heat preservation frame comprises a frame body with the self weight not less than 30kg and heat insulation fireproof cotton with the thickness of 2cm-10cm, wherein the heat insulation fireproof cotton is arranged below the frame body.
The technical features of the heat treatment furnace will be explained below.
The heating device is arranged on the top of the furnace, and the vertical structure is adopted, namely the trolley enters the heat treatment furnace body from the lower part under the action of the lifting platform, so that the lifting height of the trolley can be flexibly adjusted according to the specific size of a workpiece without heating the whole furnace body, the heat treatment energy consumption is reduced, the energy configuration is optimized, and the energy consumption cost is reduced; the distance between the upper surface of the trolley and the furnace top can be measured by arranging the distance measuring instrument on the furnace top, and the top height H of the workpiece on the trolley is measured in advance 0 The position of the top end of the workpiece, which is far away from the furnace top, is controlled according to the difference value of the two values, so that the action of the lifting platform is controlled, the accuracy and the automation level of operation are improved, the position of the trolley can be adjusted according to the size of the workpiece, and the most economical and energy-saving heating space is obtained; in addition, in order to avoid scraping edges of the trolley to the furnace lining, the size of the trolley is designed to be in clearance fit between the edges of the trolley and the furnace lining, so that the service life of the furnace lining can be prolonged, and the maintenance cost is reduced; but the existence of the clearance can cause the dissipation of heat in the heat treatment process, therefore, the invention further provides a heat preservation frame, the inner edge of the heat preservation frame is lapped with all edges of the trolley, the heat preservation frame has certain gravity, the lower part of the heat preservation frame is provided with heat insulation fireproof cotton, the heat insulation fireproof cotton is non-rigid heat preservation material, can generate certain deformation under the gravity of the bracket and generate self-sealing heat preservation effect due to lapping, the lifting movement of the heat preservation frame in the furnace body does not need complicated devices to provide power, the lifting can be realized only by depending on the self gravity and the support lapped by the trolley, the bottom end of the slide rail is provided with a seal, the heat preservation frame can be ensured not to be separated from the furnace body all the time, and the heat preservation frame can not be separated from the furnace body all the time, and can be used for preventing the heat preservation of the furnace body from being damaged due to the self gravity and the supporting of the trolleyThe seal can be welded or screwed. If the sealing and heat-preserving effect of the heat-insulating fireproof cotton is reduced after long-term use, the heat-insulating fireproof cotton can be directly replaced, the heat-insulating fireproof cotton is low in price, the replacement speed is high, the operation is convenient, and the maintenance cost is low.
It should be noted that, because the trolley and the furnace body are split, the trolley needs to move up and down in the furnace body, so the clearance between the trolley and the furnace body cannot be too small, in order to ensure convenient operation, the clearance between each edge of the trolley and the furnace lining should be 5-15cm or even larger, such a gap must be lapped and insulated through an insulation frame, otherwise, heat dissipation is too large. The heat preservation frame slides up and down in the furnace body, so that a gap is inevitably formed between the heat preservation frame and the furnace lining, but the horizontal distance between the heat preservation frame and the furnace lining is fixed in the up-and-down sliding process, so that the gap can be within 1cm, even within 5mm, such as 2mm, the gap is very small, and the density of hot air is small, the hot air has the tendency of moving upwards, so that the heat dissipation amount overflowing from the gap between the heat preservation frame and the furnace lining can be ignored. If the sealing effect of the heat-insulating frame and the furnace lining is required to be further improved, high-temperature rubber can be additionally arranged on one side, close to the furnace lining, of the heat-insulating frame, the high-temperature rubber expands after being heated, and the effect of blocking and even sealing a gap between the high-temperature rubber and the furnace lining can be achieved, so that the heat overflow is further reduced or avoided, and the utilization rate of energy is improved.
As a further improvement, the slide rails are fixedly connected with the side walls of the furnace body, and the side walls of the slide rails are wrapped by a furnace lining. Therefore, the sliding rails are actually wrapped in the furnace lining, so that the whole surface of the furnace lining is smooth, the processing of the heat-insulating frame body is facilitated, the clearance between the heat-insulating frame and the furnace lining can be reduced as much as possible, and the heat-insulating effect is improved.
As a further improvement scheme, the number of the sliding rails is 4, the sliding rails are respectively arranged at the intersection positions of the four side walls, and the sliding rails are arranged at the intersection positions of the side walls, so that the furnace lining can be built conveniently. The reason lies in, the crossing position of the inside lateral wall of furnace body is the reentrant corner, can lead to building by laying bricks or stones and have certain difficulty, sets up the slide rail in crossing position, has eliminated building by laying bricks or stones of reentrant corner part, directly build by laying bricks or stones the furnace lining to with slide rail lateral wall parcel parallel and level can, improved and built by laying bricks or stones efficiency, further reduced the cost of labor.
As a further improvement direction, the heat treatment furnace also comprises a rail arranged below the furnace body, and the trolley moves on the rail, so that the position of the trolley can be flexibly moved, the loading of workpieces at different positions is realized, and the complicated steps such as long-distance hoisting are avoided.
As a further improvement scheme, the track also comprises a positioning device, and the trolley can be accurately positioned right below the furnace body by setting the positioning device, so that the trolley and the furnace body can be quickly and accurately centered, and the working efficiency is effectively improved; as a non-limiting description, the positioning device is a baffle plate arranged on the track, and the positioning of the trolley position is realized through the baffle plate; as an optimal technical scheme, a limit switch is arranged on the baffle, when the trolley runs to the position under the furnace body on the track, the limit switch is triggered, the trolley stops moving, and accurate positioning of the trolley is achieved.
The heat-insulating fireproof cotton is one or more of glass cotton, asbestos and aluminum silicate cotton, and the materials are cheap on one hand and excellent in heat preservation effect on the other hand; the support body is steel or iron material, and two kinds of material density are higher, the acquisition cost is lower, and have good tolerance to the metal heat treatment temperature of the overwhelming majority.
In addition, in order to effectively ensure that the distance between the upper surface of the trolley and the furnace top is accurately measured by the distance measuring instrument, the distance measuring instrument is preferably arranged in an area close to a corner of the furnace top, and in addition, a position corresponding to the distance measurement is preferably marked on the upper surface of the trolley, so that the loading capacity of workpieces on the trolley can be fully ensured, the coverage of a distance measurement point when the workpieces are loaded can be avoided, and furthermore, the mark is positioned outside the lap joint area of the heat preservation frame and the trolley.
As a further improvement aspect, the bottom of the trolley is provided with a depressed area with the same size as the lifting platform, so that the rapid centering and positioning of the trolley and the lifting platform can be realized, and the centering and positioning of the trolley and the furnace body are ensured.
As another aspect of the present invention, the present invention also provides a heat treatment method using the heat treatment furnace described above, comprising the steps of:
s1: placing the workpiece on a trolley, and measuring to obtain the top height H of the workpiece on the trolley 0 ；
S2: placing the trolley on a lifting platform right below the furnace body;
s3: starting the lifting platform and measuring the distance by using a distance measuring instrument on the furnace top so as to measure and obtain the distance H between the upper surface of the trolley and the furnace top;
s4: when H = H-H 0 When the height is 30cm-60cm, controlling the lifting platform to stop lifting;
s5: starting a heating device at the top of the furnace body for heat treatment;
s6: after the heat treatment is finished, closing the heating device at the top of the furnace body and controlling the lifting platform to descend;
s7: the lifting platform is lowered to the initial position, and the workpiece is taken down from the trolley;
in the ascending process of the trolley, the heat preservation frame ascends under the lapping action of the heat preservation frame and the trolley, in the descending process of the trolley, the heat preservation frame descends under the gravity of the heat preservation frame, and in the heat treatment process, the heat preservation frame is lapped and insulated with the trolley under the gravity of the heat preservation frame.
Based on the characteristics described in the heat treatment furnace, on one hand, the heat treatment method of the heat treatment furnace can flexibly adjust the position of the trolley according to the size of the workpiece, avoid unnecessary heating space, reduce energy consumption to the maximum extent and reduce cost; on the other hand, through the clearance fit of the trolley and the furnace lining, the trolley can be prevented from lifting and scraping the furnace lining, the service life is prolonged, the maintenance cost is reduced, the heat preservation frame is arranged on the basis, the heat preservation between the trolley and the furnace lining can be realized, the heat dissipation is reduced, the cost is further reduced, the heat preservation frame plays a role by utilizing the self gravity, a complex mechanical structure is not needed, the sealing material adopted by the heat preservation frame is heat-insulation fireproof cotton, the price is low, the replacement is convenient, and the cost is further reduced.
The beneficial effects of the invention are as follows.
The heating device is arranged on the top of the heat treatment furnace, and the heat treatment furnace adopts an up-and-down structure, namely, the trolley enters the heat treatment furnace body from the lower part under the action of the lifting platform, so that the lifting height of the trolley can be flexibly adjusted according to the specific size of a workpiece without heating the whole furnace body, the heat treatment energy consumption is reduced, the energy source configuration is optimized, and the energy consumption cost is reduced.
The distance meter is arranged on the furnace top, so that the distance between the upper surface of the trolley and the furnace top can be measured in real time, and the top height H of the workpiece on the trolley is measured in advance 0 The position of the top end of the workpiece, which is far away from the furnace top, is controlled according to the difference value of the two, so that the action of the lifting platform is controlled, the accuracy and the automation level of operation are improved, the position of the trolley can be adjusted according to the size of the workpiece, and the most economical and energy-saving heating space is obtained.
In order to avoid scraping and scraping the edges of the trolleys to the furnace lining, the size of the trolleys is designed to be in clearance fit between the edges of the trolleys and the furnace lining, so that the service life of the furnace lining can be prolonged, and the maintenance cost is reduced. The existence in clearance can lead to thermal dissipation among the thermal treatment process, therefore, a heat preservation frame has been set up, the inner edge of this heat preservation frame and all marginal overlap joints of platform truck, and the heat preservation frame has certain gravity, its lower part sets up thermal-insulated fire prevention cotton, thermal-insulated fire prevention cotton is non-rigid insulation material, can produce certain deformation and because the overlap joint produces the heat preservation effect of self sealss under support gravity, and the lift activity of this heat preservation frame in the furnace body need not complicated device and provides power, only rely on self gravity and the lapped support of platform truck can realize going up and down, set up the seal in the slide rail bottom, can guarantee that the heat preservation frame can not break away from the furnace body all the time. If the sealing and heat-preserving effect of the heat-insulating fireproof cotton is reduced after long-term use, the heat-insulating fireproof cotton can be directly replaced, the heat-insulating fireproof cotton is low in price, the replacement speed is high, the operation is convenient, and the maintenance cost is low.
In conclusion, the heat treatment furnace can flexibly adjust the heating space according to the size of the workpiece, has the characteristics of energy conservation, consumption reduction, production cost reduction, simple mechanical structure and low maintenance cost, and is widely suitable for heat treatment procedures of magnesium alloy, aluminum alloy, cast iron, cast steel, alloy steel and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic side sectional view of a heat treatment furnace according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a heat-treated furnace top according to an embodiment of the present invention.
Reference numerals:
1-furnace shell; 2-furnace lining; 3, trolley; 4-lifting the platform; 5-frame body; 6-aluminum silicate cotton; 7-a heating device; 8-a range finder; 9-a workpiece; 10-spherical slider.
Detailed Description
In order to make those skilled in the art fully understand the technical solutions and advantages of the present invention, the following description is given with reference to specific embodiments.
As shown in fig. 1-2, the present embodiment provides a heat treatment furnace, which includes a furnace body, a trolley 3, and a lifting platform 4.
The furnace body is composed of a furnace shell 1 made of cast iron with the thickness of 1cm and a furnace lining 2 made of bauxite built in the furnace shell 1; furnace body overall dimension is length 500cm wide 300cm high 500cm, open the furnace body bottom has the through-hole, furnace lining 2 that 19cm is thick is all built by laying bricks or stones to four lateral walls of furnace body and furnace roof, wherein the furnace lining 2 of furnace roof sets up a plurality of U type grooves, heating device 7 is installed in U type groove, the interval of heating device 7 and each direction in U type groove is all not less than 5cm so that the heat dissipation, 8 embedded installations of distancer are in the furnace lining 2 of furnace roof, the size of furnace body inner space is length 460cm wide 260cm high 480cm.
The trolley 3 is made of cast iron, the size of the trolley is 440cm long, 240cm wide and 2cm thick, a workpiece 9 is arranged above the trolley 3, the trolley 3 is arranged on a lifting platform 4 arranged right below the furnace body, and the lifting platform 4 is lifted through a scissor type lifting mechanism; when the trolley 3 is lifted in the furnace body, the edge of the trolley 3 is in clearance fit with the furnace lining 2 based on the size setting, and the clearances of the four sides are all 10cm.
The distance meter 8 at the top of the furnace body is used for measuring the distance H between the upper surface of the trolley 3 and the furnace top, and the control system measures the top height H of the workpiece 9 on the trolley 3 in advance according to the distance H 0 Controlling the action of the lifting platform 4 to ensure that the distance H = H-H between the top end of the workpiece 9 and the furnace top 0 The position of the trolley 3 can be flexibly controlled within the range of 30-60cm by combining with the actual size of the workpiece 9, so that the heating space is adapted to the size of the workpiece 9, and energy waste is avoided.
The furnace comprises a furnace body, a furnace lining 2, a heat preservation frame, spherical sliding blocks 10 and a plurality of sliding rails, wherein the four side walls of the furnace body are respectively provided with 1 sliding rail at the intersection part, and are totally provided with 4 sliding rails; the distance between the heat preservation frame and the furnace lining 2 is 5mm, the size of the outer frame of the heat preservation frame is 459cm long multiplied by 259cm wide, the width of the frame body is 25cm, the size of the inner frame is 409cm long multiplied by 209cm wide, the thickness of the aluminum silicate cotton 6 is 5cm, the thickness of the frame body 5 is 0.5cm cast iron, the length of the outer frame is 459cm multiplied by 259cm wide, the width is 25cm, the length of the inner frame is 409cm long multiplied by 209cm wide and the density of the cast iron is 7.0g/cm 3 It is estimated that the weight of the frame 5 is about 116.9kg; the welding of slide rail bottom has sealed, guarantees that the heat preservation frame can not break away from the furnace body all the time, as described in the preceding dimensional relation, and the inner edge of heat preservation frame can be with all marginal overlap joints of platform truck 3, and the overlap joint length is 15.5cm, and under heat preservation frame self gravity, aluminium silicate cotton 6 can compact at the upper surface of platform truck 3, realizes that the heat preservation is sealed.
Hereinafter, the heat treatment method thereof will be described in conjunction with the above heat treatment furnace, which comprises the steps of:
s1: the workpiece 9 is placed on the carriage 3, and the height H of the top end of the workpiece 9 on the carriage 3 is measured 0 ；
S2: placing a trolley 3 on a lifting platform 4 right below the furnace body;
s3: starting a scissor-fork type lifting mechanism of the lifting platform 4, and measuring the distance by a distance measuring instrument 8 on the furnace top to obtain the distance H between the upper surface of the trolley 3 and the furnace top;
s4: when H = H-H 0 When the height is 30cm-60cm, controlling the lifting platform 4 to stop lifting;
s5: starting a furnace body top heating device 7 for heat treatment;
s6: after the heat treatment is finished, closing the heating device 7 at the top of the furnace body, and controlling the lifting platform 4 to descend;
s7: the lifting platform 4 is lowered to the initial position, and the workpiece 9 is taken down from the trolley 3;
in the ascending process of the trolley 3, the heat preservation frame ascends under the lapping action of the trolley 3, in the descending process of the trolley 3, the heat preservation frame descends under the gravity of the heat preservation frame, and in the heat treatment process, the heat preservation frame is lapped and insulated with the trolley 3 under the gravity of the heat preservation frame.
The heat treatment furnace and the heat treatment method using the heat treatment furnace provided by the embodiment can flexibly adjust the heating space according to the size of the workpiece, have the characteristics of energy conservation, consumption reduction, production cost reduction, simple mechanical structure and low maintenance cost, and are widely applicable to heat treatment processes of magnesium alloy, aluminum alloy, cast iron, cast steel, alloy steel and the like.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The heat treatment furnace is characterized by comprising a furnace body, a trolley and a lifting platform;
the bottom of the furnace body is communicated with the opening, the four side walls and the top of the furnace body are provided with fireproof and heat-insulating furnace linings, and the heating device is arranged at the top of the furnace body;
the lifting platform is positioned under the furnace body and used for controlling the lifting of the trolley in the furnace body, and when the trolley is lifted in the furnace body, the edge of the trolley is in clearance fit with the furnace lining;
the top of the furnace body is also provided with a distance meter for measuring the distance H between the upper surface of the trolley and the furnace top, and the control system measures the top height H of the workpiece on the trolley in advance according to the distance H 0 Controlling the action of the lifting platform to ensure that the distance H = H-H between the top end of the workpiece and the furnace top 0 Is 30cm-60cm;
a plurality of vertical sliding rails are arranged on the side wall of the furnace body, a seal is arranged at the bottom end of each sliding rail, the heat-insulating frame slides along the sliding rails, the inner edge of the heat-insulating frame can be lapped with all edges of the trolley, and the lapping length is 10cm-30cm;
the heat preservation frame comprises a frame body with the self weight not less than 30kg and heat insulation fireproof cotton with the thickness of 2cm-10cm, wherein the heat insulation fireproof cotton is arranged below the frame body.
2. The heat treatment furnace according to claim 1, wherein the slide rails are fixedly connected with the side wall of the furnace body, and both sides of the slide rails are wrapped by the furnace lining.
3. The heat treating furnace according to claim 2, wherein the number of the slide rails is 4, and the slide rails are respectively provided at the intersection of four side walls.
4. The heat-treating furnace according to claim 1, further comprising a rail provided below the furnace body, the carriage moving on the rail.
5. The heat treatment furnace of claim 1, wherein the track further comprises a positioning device for positioning the trolley directly under the furnace body.
6. The furnace of claim 1, wherein the positioning device is a baffle plate disposed on the track.
7. The heat treatment furnace according to claim 1, wherein the baffle is provided with a limit switch, and when the trolley runs to a position right below the furnace body on the track, the limit switch is triggered, so that the trolley stops moving.
8. The furnace of claim 1, wherein the heat-insulating and fireproof cotton is one or more of glass wool, asbestos and aluminum silicate wool.
9. The furnace of claim 1, wherein the frame is made of steel or iron.
10. A heat treatment method using the heat treatment furnace as claimed in any one of claims 1 to 9, comprising the steps of:
s1: placing the workpiece on a trolley, and measuring to obtain the top height H of the workpiece on the trolley 0 ；
S2: placing the trolley on a lifting platform right below the furnace body;
s3: starting the lifting platform and measuring the distance by using a distance measuring instrument on the furnace top so as to measure and obtain the distance H between the upper surface of the trolley and the furnace top;
s4: when H = H-H 0 When the height is 30cm-60cm, controlling the lifting platform to stop lifting;
s5: starting a heating device at the top of the furnace body for heat treatment;
s6: after the heat treatment is finished, closing the heating device at the top of the furnace body, and controlling the lifting platform to descend;
s7: the lifting platform is lowered to the initial position, and the workpiece is taken down from the trolley;
in the ascending process of the trolley, the heat preservation frame ascends under the lapping action of the heat preservation frame and the trolley, in the descending process of the trolley, the heat preservation frame descends under the gravity of the heat preservation frame, and in the heat treatment process, the heat preservation frame is lapped and insulated with the trolley under the gravity of the heat preservation frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211126783.9A CN115341084B (en) | 2022-09-16 | 2022-09-16 | Heat treatment furnace |
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| CN202211126783.9A CN115341084B (en) | 2022-09-16 | 2022-09-16 | Heat treatment furnace |
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| CN115341084B CN115341084B (en) | 2024-04-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2240700Y (en) * | 1995-09-13 | 1996-11-20 | 李贵 | Bell-type loop wheel machine electric resistance furnace |
| CN103940228A (en) * | 2013-01-21 | 2014-07-23 | 洛阳华旭利尔电炉有限公司 | High-temperature lifting furnace |
| CN110699533A (en) * | 2019-10-12 | 2020-01-17 | 哈尔滨飞机工业集团有限责任公司 | Heat treatment furnace convenient for temperature measurement and capable of reducing temperature measurement errors |
| CN211367666U (en) * | 2020-01-03 | 2020-08-28 | 大连日新铸造有限公司 | Adjustable heat treatment furnace |
-
2022
- 2022-09-16 CN CN202211126783.9A patent/CN115341084B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2240700Y (en) * | 1995-09-13 | 1996-11-20 | 李贵 | Bell-type loop wheel machine electric resistance furnace |
| CN103940228A (en) * | 2013-01-21 | 2014-07-23 | 洛阳华旭利尔电炉有限公司 | High-temperature lifting furnace |
| CN110699533A (en) * | 2019-10-12 | 2020-01-17 | 哈尔滨飞机工业集团有限责任公司 | Heat treatment furnace convenient for temperature measurement and capable of reducing temperature measurement errors |
| CN211367666U (en) * | 2020-01-03 | 2020-08-28 | 大连日新铸造有限公司 | Adjustable heat treatment furnace |
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| CN115341084B (en) | 2024-04-12 |
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