CN115341084B - Heat treatment furnace - Google Patents
Heat treatment furnace Download PDFInfo
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- CN115341084B CN115341084B CN202211126783.9A CN202211126783A CN115341084B CN 115341084 B CN115341084 B CN 115341084B CN 202211126783 A CN202211126783 A CN 202211126783A CN 115341084 B CN115341084 B CN 115341084B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 83
- 238000004321 preservation Methods 0.000 claims abstract description 56
- 229920000742 Cotton Polymers 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 15
- 230000005484 gravity Effects 0.000 claims description 14
- 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 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000009916 joint effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 230000009970 fire resistant effect Effects 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
- 210000002268 wool Anatomy 0.000 claims 2
- 239000011491 glass wool Substances 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
- 238000007789 sealing Methods 0.000 description 8
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 241000283216 Phocidae Species 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000009467 reduction Effects 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
- 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
- 230000006978 adaptation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000463 material Substances 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
- 230000002035 prolonged effect 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
- 230000008859 change Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Thermal Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention relates to a heat treatment furnace, wherein the bottom of a furnace body is provided with a through opening, four side walls and the top of the furnace body are provided with refractory and heat-insulating furnace liners, and a heating device is arranged at the top of the furnace body; the lifting platform is positioned right below 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 is lifted 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 roof, and the control system is used for measuring the top height H of the workpiece on the trolley according to the H and the pre-measured top height H of the workpiece on the trolley 0 Controlling the lifting platform so that the distance h=h-H between the top of the workpiece and the furnace roof 0 30-60cm; the side wall of the furnace body is provided with a plurality of vertical sliding rails with low-end seals, the heat preservation frame slides along the sliding rails, the inner edge of the heat preservation frame can be overlapped with all edges of the trolley, and the overlapping length is 10-30cm; the heat preservation frame comprises a frame body with the dead weight not less than 30kg and heat-insulating fireproof cotton with the thickness of 2-10cm 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 technological measure for improving various properties of metals, and a heat treatment furnace is an essential equipment for heat treatment.
The traditional heat treatment furnace is box-type, the workpiece is horizontally in and out, and the box body is provided with a furnace door. In order to accommodate workpieces of different sizes, the size of the box is generally designed to be relatively large. In the use process of the heat treatment furnace, on one hand, the whole furnace body needs to be heated when the size of a workpiece is smaller due to the fact that the box body is larger, the heating space cannot be flexibly adjusted according to the size of the workpiece, and therefore energy consumption and cost are increased; on the other hand, mechanical collision of the furnace door during use 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 loose sealing after long-term use, so that excessive heat in the heat treatment process is dissipated, the energy consumption is increased, and meanwhile, the maintenance and replacement cost of the furnace door is higher. In view of the above drawbacks, the conventional 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 heat treatment furnace provided by the invention has the advantages that the heating space can be adjusted according to the size of a workpiece, the energy consumption is effectively reduced, the heat insulation is realized by adopting the heat insulation fireproof cotton, the heat dissipation in the heat treatment process can be prevented, and meanwhile, the cost of the heat insulation fireproof cotton is lower, so that the energy consumption cost and the maintenance cost can be reduced advantageously.
The heat treatment furnace comprises a furnace body, a trolley and a lifting platform; the bottom of the furnace body is provided with a through 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 right below the furnace body and used for controlling the trolley to lift in the furnace body, and when the trolley lifts 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 roof, and the control system is used for measuring the top height H of the workpiece on the trolley according to the distance H and the pre-measured top height H of the workpiece 0 Controlling the motion of the lifting platform to ensure that the distance h=H-H between the top end of the workpiece and the furnace top 0 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 preservation frame slides along the sliding rail, the inner edge of the heat preservation frame can be overlapped with all edges of the trolley, and the overlapping length is 10cm-30cm; the heat preservation frame comprises a frame body with the dead weight not less than 30kg and heat-insulating fireproof cotton with the thickness of 2cm-10cm arranged below the frame body.
Technical features of the heat treatment furnace will be described below.
The heat treatment furnace is characterized in that the heating device is arranged on the furnace top, and an up-down structure is adopted, namely, the trolley enters the heat treatment furnace body from below under the action of the lifting platform, so that the lifting height of the trolley can be flexibly adjusted according to the specific workpiece size, the whole furnace body is not required to be heated, the heat treatment energy consumption is reduced, the energy configuration is optimized, and the energy consumption cost is reduced; by arranging the distance measuring instrument on the furnace roof, the upper surface of the trolley and the furnace roof can be alignedIs measured in combination with a pre-measured tip height H of the workpiece on the trolley 0 The position of the top end of the workpiece, which is 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 the operation are improved, and the most economical and energy-saving heating space can be obtained according to the adjustment of the position of the trolley by the size of the workpiece; in addition, in order to prevent the edges of the trolley from being scratched to the furnace lining, the trolley is designed to be in clearance fit with the furnace lining, so that the service life of the furnace lining can be prolonged, and the maintenance cost is reduced; however, the heat dissipation in the heat treatment process can be caused by the existence of gaps, so the invention further provides a heat preservation frame, the inner edge of the heat preservation frame is overlapped 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, certain deformation can be generated under the gravity of the bracket and self-sealing heat preservation effect can be generated due to the overlapping, the lifting movement of the heat preservation frame in the furnace body does not need to be powered by a complicated device, the lifting movement can be realized only by the self gravity and the overlapping support of the trolley, and the bottom end of the sliding rail is provided with a seal, so that the heat preservation frame can not be separated from the furnace body all the time, and the seal can be welded or in threaded connection. If the sealing and heat-preserving effects of the heat-insulating and fireproof cotton are reduced after long-term use, the heat-insulating and fireproof cotton can be directly replaced, and the heat-insulating and fireproof cotton is low in price, high in replacement speed, convenient to operate and low in maintenance cost.
It should be pointed out that, because the trolley and the furnace body adopt split type, the trolley needs to move up and down in the furnace body, so that the gap between the trolley and the furnace body cannot be too small, in order to ensure convenient operation, the gap between each edge of the trolley and the furnace lining should be 5-15cm or even larger, and the gap must be lapped and insulated by a heat insulation frame, otherwise, the heat dissipation is too large. The heat preservation frame can have a gap with the furnace lining due to the fact that the heat preservation frame slides up and down in the furnace body, however, the horizontal distance between the heat preservation frame and the furnace lining is fixed in the process of sliding up and down, so that the gap can be within 1cm, even within 5mm, such as 2mm, the gap is small, and the heat dissipation capacity is negligible due to the fact that the density of hot air is small and the heat preservation frame has a tendency of upwards moving. If the sealing effect of the heat preservation 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 Wen Kuang, and the high-temperature rubber expands after being heated and can play a role in blocking or even sealing a gap between the high-temperature rubber and the furnace lining, so that heat overflow is further reduced or avoided, and the energy utilization rate is improved.
As a further improvement, the sliding rail is fixedly connected with the side wall of the furnace body, and the side wall of the sliding rail is wrapped by the furnace lining. Therefore, the slide rail is practically wrapped in the furnace lining, which is beneficial to the leveling of the whole surface of the furnace lining, is also beneficial to the processing of the heat-insulating frame body, can reduce the gap between the heat-insulating frame and the furnace lining as much as possible, and improves the heat-insulating effect.
As a further improvement scheme, the number of the sliding rails is 4, the sliding rails are respectively arranged at the intersecting positions of the four side walls, and the sliding rails are arranged at the intersecting positions of the side walls, so that the lining of the furnace can be conveniently built. The inside lateral wall of the furnace body is crossed to form an internal corner, so that certain difficulties can be caused in masonry, the sliding rail is arranged at the crossed position, the masonry of the internal corner is eliminated, the lining of the furnace is directly wrapped and leveled with the lateral wall of the sliding rail, the masonry efficiency is improved, and the labor cost is further reduced.
As a further improvement direction, the heat treatment furnace further comprises a track arranged below the furnace body, and the trolley moves on the track, so that the position of the trolley can be flexibly moved, loading of workpieces at different positions is realized, and 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 to the position right below the furnace body by setting the positioning device, so that the trolley and the furnace body can be rapidly and accurately centered, and the working efficiency is effectively improved; by way of non-limiting illustration, the positioning device is a baffle plate arranged on the rail, and positioning of the trolley position is realized through the baffle plate; as the preferable technical scheme, a limit switch is arranged on the baffle, when the trolley moves to the position right below the furnace body on the track, the limit switch is triggered, the trolley stops moving, and the accurate positioning of the trolley is realized.
By way of non-limiting illustration, the heat-insulating and fire-resistant cotton is one or more of glass cotton, asbestos and aluminum silicate cotton, which are cheap on one hand and excellent in heat preservation effect on the other hand; the frame body is made of steel or iron, the density of the two materials is high, the acquisition cost is low, and the frame body has good tolerance to most metal heat treatment temperatures.
In addition, in order to effectively ensure that the distance between the upper surface of the trolley and the furnace roof is accurately measured by the distance meter, the distance meter is preferably arranged in an area close to the corner of the furnace roof, and in addition, the position of the upper surface of the trolley, corresponding to the distance measurement, is preferably marked, so that the loading capacity of workpieces on the trolley can be fully ensured, the distance measurement point can be prevented from being covered when the workpieces are loaded, and further, the mark is positioned outside the overlapping area of the heat preservation frame and the trolley.
As a further improvement aspect, the bottom of the trolley is provided with a concave area with the same size as the lifting platform, so that the trolley and the lifting platform can be quickly centered and positioned, and the centering and positioning of the trolley and the furnace body are ensured.
As another aspect of the present invention, there is also provided 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 end height H of the workpiece on the trolley 0 ；
S2: placing the trolley on a lifting platform right below the furnace body;
s3: starting a lifting platform and simultaneously measuring the distance by a range finder at the top of the furnace to measure and obtain the distance H between the upper surface of the trolley and the top of the furnace;
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 to perform heat treatment;
s6: after the heat treatment is finished, the heating device at the top of the furnace body is closed, and the lifting platform is controlled to descend;
s7: the lifting platform descends to an initial position, and the workpiece is taken down from the trolley;
in the lifting process of the trolley, the heat preservation frame is lifted under the lap joint action of the heat preservation frame and the trolley, in the descending process of the trolley, the heat preservation frame is lowered under the gravity of the heat preservation frame, and in the heat treatment process, the heat preservation frame is overlapped with the trolley under the gravity of the heat preservation frame.
On the 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 platform truck and furnace wall, can avoid the platform truck to go up and down to scratch the scraping of furnace wall, improve life, reduce maintenance cost, set up the heat preservation frame on this basis and can realize the heat preservation between platform truck and the furnace wall, reduced thermal dissipation, further reduce cost to this heat preservation frame utilizes self gravity to exert effect, need not complicated mechanical structure, and the sealing material that its adopted is thermal-insulated flame proof cotton, low price and change are convenient, do benefit to further reduce cost.
The beneficial effects of the invention are as follows.
The heat treatment furnace is provided with the heating device at the furnace top, and adopts an up-down structure, namely, the trolley enters the heat treatment furnace body from below under the action of the lifting platform, so that the lifting height of the trolley can be flexibly adjusted according to the specific workpiece size, the whole furnace body is not required to be heated, the heat treatment energy consumption is reduced, the energy configuration is optimized, and the energy consumption cost is reduced.
By arranging the range finder on the furnace roof, the distance between the upper surface of the trolley and the furnace roof can be measured in real time, and the top height H of a workpiece on the trolley, which is measured in advance, is combined 0 The position of the top end of the workpiece, which is 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 the operation are improved, and the most economical and energy-saving heating space can be obtained according to the adjustment of the position of the trolley by the size of the workpiece.
In order to prevent the edges of the trolley from being scratched and scraped to the furnace lining, the trolley is designed to be in clearance fit with the furnace lining at the edges, so that the service life of the furnace lining can be prolonged, and the maintenance cost is reduced. The existence of clearance can lead to the dissipation of heat in the heat treatment process, therefore, a heat preservation frame has been set up, the inner edge of this heat preservation frame and all edge overlap joints of platform truck, and the heat preservation frame has certain gravity, its lower part sets up thermal-insulated fireproof cotton, thermal-insulated fireproof cotton is non-rigid insulation material, can produce certain deformation and produce self sealss heat preservation effect owing to the overlap joint under the 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 support of platform truck overlap joint 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 effects of the heat-insulating and fireproof cotton are reduced after long-term use, the heat-insulating and fireproof cotton can be directly replaced, and the heat-insulating and fireproof cotton is low in price, high in replacement speed, convenient to operate and low in maintenance cost.
In conclusion, the heat treatment furnace provided by the invention can flexibly adjust the heating space according to the size of a workpiece, has the characteristics of energy conservation, consumption reduction, production cost reduction, simple mechanical structure and low maintenance cost, and is widely applicable to 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
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 top cross-sectional view of a heat treatment furnace according to an embodiment of the present invention.
Reference numerals:
1-furnace shell; 2-lining; 3-a trolley; 4-lifting platform; 5-a frame body; 6-aluminum silicate cotton; 7-a heating device; 8-distance measuring instrument; 9-a workpiece; 10-spherical slider.
Detailed Description
In order to fully understand the technical scheme and the beneficial effects of the present invention for those of ordinary skill in the art, the following description is further made with reference to specific embodiments.
As shown in fig. 1-2, the present embodiment provides a heat treatment furnace including a furnace body, a dolly 3, and a lifting platform 4.
The furnace body consists 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; the overall dimension of the furnace body is 500cm long by 300cm wide by 500cm high, a through hole is formed in the bottom of the furnace body, four side walls of the furnace body and the furnace roof are all provided with furnace linings 2 with the thickness of 19cm, wherein the furnace linings 2 of the furnace roof are provided with a plurality of U-shaped grooves, the heating device 7 is arranged in the U-shaped grooves, the distance between the heating device 7 and each direction of the U-shaped grooves is not less than 5cm so as to facilitate heat dissipation, the range finder 8 is embedded into the furnace linings 2 of the furnace roof, and the dimension of the inner space of the furnace body is 460cm long by 260cm wide by 480cm.
The trolley 3 is made of cast iron, the dimensions of the trolley are 440cm long by 240cm wide by 2cm thick, the workpiece 9 is arranged above the trolley 3, the trolley 3 is arranged on the lifting platform 4 arranged right below the furnace body, and the lifting platform 4 is lifted by a scissor type lifting mechanism; when the trolley 3 is lifted up and down in the furnace body, the edges of the trolley 3 are in clearance fit with the furnace lining 2 based on the size setting, and the clearance between the four edges is 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 roof, and the control system is used for measuring the top height H of the workpiece 9 on the trolley 3 according to the distance H and the pre-measured top height H 0 The motion of the lifting platform 4 is controlled so that the distance h=h-H between the top end of the workpiece 9 and the furnace roof 0 The position of the trolley 3 can be flexibly controlled to be 30cm-60cm so as to be combined with the actual size of the workpiece 9 to adjust the position of the trolley, so that the heating space is adapted to the size of the workpiece 9, and the energy waste is avoided.
The four lateral walls of furnace body each other intersect department and set up 1 slide rail, set up 4 slide rails altogether, and furnace wall 2 parcel slide rail's lateral wall sets up, and the heat preservation frame includes support body 5 and sets up the aluminium silicate cotton 6 in support body 5 below, keeps warmThe four corners of the frame body 5 of the frame are provided with spherical sliding blocks 10, and the spherical sliding blocks 10 are arranged in the sliding rails, so that the heat preservation frame can slide up and down along the sliding rails in the furnace; the distance between the heat preservation frame and the furnace lining 2 is 5mm, the outer frame size of the heat preservation frame is 459cm multiplied by 259cm, the width of the frame body is 25cm, the inner frame size of the heat preservation frame is 409cm multiplied by 209cm, the thickness of the aluminum silicate cotton 6 is 5cm, the frame body 5 is cast iron with the thickness of 0.5cm, and the heat preservation frame is characterized in that the outer frame size is 459cm multiplied by 259cm, the width of the heat preservation frame is 25cm, the inner frame size is 409cm multiplied by 209cm, and the cast iron density is 7.0g/cm 3 The estimated weight of the frame 5 is about 116.9kg; the sealing is welded at the bottom end of the sliding rail, so that the heat preservation frame is not separated from the furnace body all the time, as described by the dimensional relationship, the inner edge of the heat preservation frame can be lapped with all edges of the trolley 3, the lapping length is 15.5cm, and aluminum silicate cotton 6 can be compacted on the upper surface of the trolley 3 under the gravity of the heat preservation frame, so that heat preservation sealing is realized.
Next, a heat treatment method thereof will be described in connection with the above heat treatment furnace, which includes the steps of:
s1: placing the workpiece 9 on the carriage 3, and measuring to obtain the tip height H of the workpiece 9 on the carriage 3 0 ；
S2: placing the 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 simultaneously, measuring the distance by a distance meter 8 at the top of the furnace to obtain the distance H between the upper surface of the trolley 3 and the top of the furnace;
s4: when h=h-H 0 When the height is 30cm-60cm, the lifting platform 4 is controlled to stop lifting;
s5: starting a furnace body top heating device 7 to perform heat treatment;
s6: after the heat treatment is finished, the heating device 7 at the top of the furnace body is closed, and the lifting platform 4 is controlled to descend;
s7: the lifting platform 4 descends to an initial position, and the workpiece 9 is taken down from the trolley 3;
in the process of lifting the trolley 3, the heat-insulating frame is lifted under the lap joint action of the heat-insulating frame and the trolley 3, in the process of lifting the trolley 3, the heat-insulating frame is lifted under the gravity of the heat-insulating frame, and in the process of heat treatment, the heat-insulating frame is lapped with the trolley 3 under the gravity of the heat-insulating frame.
The heat treatment furnace and the heat treatment method using the heat treatment furnace 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 procedures of magnesium alloy, aluminum alloy, cast iron, cast steel, alloy steel and the like.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
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 (9)
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 provided with a through 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 right below the furnace body and used for controlling the trolley to lift in the furnace body, and when the trolley lifts 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 roof, and the control system is used for measuring the top height H of the workpiece on the trolley according to the distance H and the pre-measured top height H of the workpiece 0 Controlling the motion of the lifting platform to ensure that the distance h=H-H between the top end of the workpiece and the furnace top 0 30cm-60cm;
the side wall of the furnace body is provided with a plurality of vertical sliding rails, the sliding rails are fixedly connected with the side wall of the furnace body, two sides of each sliding rail are wrapped by furnace liners, the bottom ends of the sliding rails are provided with seals, 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 10cm-30cm;
the heat preservation frame comprises a frame body with the dead weight not less than 30kg and heat-insulating fireproof cotton with the thickness of 2cm-10cm arranged below the frame body.
2. A heat treatment furnace according to claim 1, wherein the number of the slide rails is 4, and the slide rails are provided at the intersections of the four side walls with each other.
3. A heat treatment furnace according to claim 1, further comprising a rail provided below the furnace body, the trolley moving on the rail.
4. A heat treatment furnace according to claim 3, wherein the track further comprises positioning means for positioning the trolley directly under the furnace body.
5. A heat treatment furnace according to claim 4, wherein the positioning means is a baffle plate provided on the rail.
6. A heat treatment furnace according to claim 5, wherein the baffle is provided with a limit switch, and the trolley stops moving when the trolley moves on the rail to a position right below the furnace body.
7. A heat treatment furnace according to claim 1, wherein the heat-insulating and fire-resistant wool is one or more of glass wool, asbestos, and aluminum silicate wool.
8. A heat treatment furnace according to claim 1, wherein the frame is made of steel or iron.
9. A heat treatment method using the heat treatment furnace according to any one of claims 1 to 8, comprising the steps of:
s1: placing the workpiece on a trolley, and measuring to obtain the top end height H of the workpiece on the trolley 0 ；
S2: placing the trolley on a lifting platform right below the furnace body;
s3: starting a lifting platform and simultaneously measuring the distance by a range finder at the top of the furnace to measure and obtain the distance H between the upper surface of the trolley and the top of the furnace;
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 to perform heat treatment;
s6: after the heat treatment is finished, the heating device at the top of the furnace body is closed, and the lifting platform is controlled to descend;
s7: the lifting platform descends to an initial position, and the workpiece is taken down from the trolley;
in the lifting process of the trolley, the heat preservation frame is lifted under the lap joint action of the heat preservation frame and the trolley, in the descending process of the trolley, the heat preservation frame is lowered under the gravity of the heat preservation frame, and in the heat treatment process, the heat preservation frame is overlapped with the trolley under the gravity of the heat preservation frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211126783.9A CN115341084B (en) | 2022-09-16 | 2022-09-16 | Heat treatment furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211126783.9A CN115341084B (en) | 2022-09-16 | 2022-09-16 | Heat treatment furnace |
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| CN115341084B true 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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| CN115341084A (en) | 2022-11-15 |
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