CN111551028A - Large-scale workpiece heating furnace - Google Patents
Large-scale workpiece heating furnace Download PDFInfo
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- CN111551028A CN111551028A CN202010295765.8A CN202010295765A CN111551028A CN 111551028 A CN111551028 A CN 111551028A CN 202010295765 A CN202010295765 A CN 202010295765A CN 111551028 A CN111551028 A CN 111551028A
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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
- F27B17/00—Furnaces of a kind not covered by any preceding group
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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
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1858—Doors
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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
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
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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
- F27D19/00—Arrangements of controlling devices
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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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/04—Circulating atmospheres by mechanical means
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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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a large-scale workpiece heating furnace, which comprises a plurality of circulating fans, wherein an air outlet on the furnace top is arranged towards the inner side of a furnace body, a gas circulating flow guide system is arranged between the furnace body and an inner furnace chamber and comprises a plurality of arc-shaped flow guide plates, one end of the gas circulating flow guide system is arranged in the air outlet of the circulating fans, the other end of the gas circulating flow guide system extends out of the air outlet and is arranged vertically at intervals, the arc-shaped flow guide plates divide the air outlet into a plurality of air outlet branch openings, and the air outlet branch openings are gradually widened outwards from the side direction; the first straight guide plate and the second straight guide plate are vertically arranged and are respectively connected with two side edges of the air outlet of each circulating fan and are also connected with the inner side surface of the furnace body and the outer side surface of the inner hearth, and the inner side surface of the furnace body, the outer side surface of the inner hearth, the first straight guide plate and the second straight guide plate form a plurality of vertical air channels. The gas in the furnace body is uniformly heated by arranging the gas circulation flow guide system, so that the temperature of the gas entering the inner furnace chamber is consistent, and the workpiece is uniformly heated.
Description
Technical Field
The invention belongs to the technical field of heat treatment mechanical equipment, and particularly relates to a large-sized workpiece heating furnace.
Background
In the aerospace field of China, due to the special service environment of the workpiece, the requirements on the organization performance and the machining size precision of the workpiece are high.
The structural performance requirement of the large aluminum alloy ring piece for spaceflight is high, and a large heat treatment furnace with high temperature rise speed, high temperature control precision and high furnace temperature uniformity is required to be adopted in the heat treatment process. The traditional large-scale ring heat treatment furnace adopts single-fan circulation, and the gas circulation capacity in the furnace is poor, so that the temperature difference in the furnace is large; the equipment temperature precision is low, the temperature uniformity is sharply reduced along with the increase of the size of the hearth, the processing quality of the large ring piece is difficult to control, the rejection rate is increased, the production efficiency is reduced, and the processing cost is increased.
Disclosure of Invention
In view of the above, the present invention provides a large workpiece heating furnace, which solves the problems of large temperature difference in the furnace and uneven heating temperature of the workpiece.
The invention relates to a large-scale workpiece heating furnace, which comprises a furnace body with an opening at the lower end and an inner hearth which is arranged in the furnace body, the upper end of the inner hearth is fixedly connected with the top of the furnace body, and the lower end of the inner hearth is open,
a first space is formed between the top of the inner hearth and the furnace body, and a second space is formed between the side wall of the inner hearth and the furnace body;
the circulating fans are arranged at the top of the furnace body, exhaust inlets of the circulating fans are communicated with air outlets on the top of the inner hearth, air outlets of the circulating fans are arranged in the first space towards the inner side of the furnace body, and the first space is uniformly divided into a plurality of first subspaces corresponding to the air outlets of the circulating fans;
at least one heater is arranged in the first subspace;
the gas circulation flow guide system comprises a first straight guide plate and a second straight guide plate which are arranged at two sides of an air outlet of the circulating fan in the second space, and the second space is uniformly divided into a plurality of second subspaces; the first subspace and the second subspace corresponding to the same circulating fan are communicated;
and an air inlet is formed in the side wall of the inner hearth corresponding to the second subspace.
Therefore, the problem of poor airflow circulation of a single fan is solved by arranging the plurality of circulating fans; the gas circulation flow guide system is arranged to prevent the air flows among the circulating fans from being interfered with each other, so that the gas in the furnace body is uniformly heated, and the temperature of the gas entering the inner hearth is consistent; the utility model discloses a furnace body, including the air outlet, furnace body, interior furnace constitute a vertical wind channel, the furnace body, interior furnace constitutes a vertical wind channel, the wind that blows off from a plurality of air-out branch mouths gets into the vertical wind channel after being heated in the wind that specific both sides limit at every air outlet sets up a straight guide plate of connecting furnace body and interior furnace respectively, two straight guide plates, the furnace body, interior furnace constitutes a vertical wind channel, flow downwards in getting into the vertical wind channel after the wind that blows off from the air outlet is heated, the air outlet of every fan corresponds a vertical wind channel, thereby guarantee to get into interior furnace after the wind that blows. Unsmooth circulation that single fan arouses can not appear, leads to the internal gas temperature of furnace uneven to the gas that gets into in the interior furnace has the difference in temperature, and the work piece is heated unevenly, influences the work piece quality.
Preferably, the gas circulation diversion system further comprises a plurality of arc-shaped diversion plates located in the first subspace, one end of each arc-shaped diversion plate is arranged in the air outlet of the circulation fan, the other end of each arc-shaped diversion plate extends to the second subspace, the air outlet of the circulation fan in the first subspace is divided into a plurality of air outlet branch openings, and the air outlet branch openings gradually widen outwards from the side direction of the air outlet.
By last, set up a plurality of arc guide plates at every circulating fan's air outlet, cut apart into a plurality of width gradually wide air-out branch mouths with the air outlet, reduce the air current swirl of air outlet department, make the air current flow downwards along the interior furnace outside after being heated by the heater.
Preferably, the number of the arc-shaped guide plates is three, and the three arc-shaped guide plates are respectively a first arc-shaped guide plate, a second arc-shaped guide plate and a third arc-shaped guide plate;
and a third straight guide plate connected with the other end of the second arc-shaped guide plate is also arranged between the first straight guide plate and the second straight guide plate in the second subspace.
By last, set up the straight guide plate of third in the middle of first, two straight guide plates, and link to each other with second arc guide plate, the straight guide plate of third falls into two with vertical wind channel, and each vertical wind channel corresponds two air-out branch mouths respectively, and furnace's amount of wind in furnace is got into in control more accurate like this, makes the wind that gets into furnace in from different regions more even.
Preferably, the circulating fan is a second circulating fan to a fifth circulating fan, and a first circulating fan is further arranged on the furnace roof in the middle of the second circulating fan, the third circulating fan, the fourth circulating fan and the fifth circulating fan in the first space.
And the first circulating fan is arranged in the second circulating fan, the second circulating fan and the fifth circulating fan and is used for supplementing air flow.
Preferably, a flow deflector is further disposed at a lower side of the air inlet of the inner furnace chamber in the second subspace.
By the upper and lower guide vanes, the airflow can be guided by the guide vanes to uniformly enter the inner hearth through the upper and lower air inlets on the inner hearth, so that the temperature of upper and lower hot air in the inner hearth is uniform, and workpieces are uniformly heated.
Preferably, the furnace further comprises a controller and a temperature measuring couple arranged in the furnace body, wherein the controller controls the circulating fan and the heater according to the temperature detected by the temperature measuring couple.
The closed-loop temperature measuring system is formed by the controller, the temperature measuring couple, the circulating fan and the heater, and the temperature in the furnace body can be accurately controlled to be maintained at a set temperature, so that a heating workpiece can be heated uniformly, and the rate of the workpiece is high.
Preferably, a plurality of furnace body bearings supported on the horizontal ground are uniformly arranged on the outer side wall of the furnace body.
By the upper part, the furnace body is supported on the horizontal ground, and the furnace body can be semi-suspended underground, so that the height of the furnace body on the ground is reduced, and the stability is improved.
Preferably, the furnace door of the furnace body is arranged at the bottom and is divided into two parts.
As a result, the time required to open and close the split door is short, and heat loss in the furnace body is reduced when the heated workpiece is taken out of the furnace body.
Drawings
FIG. 1 is a schematic view of a spatial structure of a heating furnace;
FIG. 2 is a cross-sectional view taken along a vertical center plane of the heating furnace;
FIG. 3 is a schematic structural view of a hanger in a furnace;
FIG. 4 is a top view of the furnace with the roof removed;
1 furnace body 2 circulating fan system 3 furnace door assembly 4 furnace door moving track 5 inner furnace 6 electric heater 7 gas circulation diversion system 8 furnace inner sling
11 the air outlet 22 of the circulating fan of the furnace body supporting 21 the air outlet 23 of the circulating fan air outlet and the air suction inlet 71 of the circulating fan at the second side 24 of the air outlet of the circulating fan, a first arc-shaped guide plate 72, a second arc-shaped guide plate 73, a third arc-shaped guide plate 74, a first straight guide plate 75, a second straight guide plate 76 and a third straight guide plate 76.
Detailed Description
The heating furnace shown in fig. 1 and 2 is used for carrying out heat treatment on large aluminum alloy rings and comprises a cylindrical furnace body 1, wherein the furnace body 1 comprises a furnace top and a furnace door assembly arranged at the furnace bottom;
the furnace body 1 comprises a furnace shell and a heat insulation material, the furnace shell is of a cylindrical structure formed by combining and welding steel plates and section steel, the steel plates are welded in a sealing mode, the section steel is used as a keel for reinforcement, and the strength is verified to be firm and reliable through simulation optimization. The furnace lining is a high-purity refractory fiber module, so that the heat loss in the working process of the heating furnace is reduced, and the temperature of the furnace body is ensured.
The furnace door component 3 and the furnace door moving track 4 are arranged at the bottom of the furnace body 1, and the furnace door component 3 comprises a furnace door which is opened in a split mode and a furnace door opening and closing structure which controls the opening and closing of the furnace door. When the oven door opening and closing structure works, the oven door is controlled to move back along the oven door moving track 4 so as to open the oven door. The furnace door is composed of a steel structure and a heat-resistant cast iron frame. The steel structure is formed by welding a square steel pipe and a steel plate; the structural design of the furnace door part fully considers the problem of thermal deformation of the frame and ensures the integral rigidity of the frame. High-purity refractory fiber is filled in the furnace door to reduce the heat loss in the furnace. The furnace door opening and closing structure comprises a speed reduction motor with a brake, a chain wheel, a bearing and the like, and is convenient for the furnace door to be quickly opened when a workpiece is transferred. The furnace door moving track is formed by welding I-shaped steel and section steel, and ensures that the furnace door can quickly and horizontally move along the track. Compared with the traditional unilateral moving opening and closing furnace door, the bottom opening and closing furnace door has short opening and closing distance, thereby the workpiece in the furnace body is transferred fast and the heat loss is small.
The middle part of the outer side wall of the furnace shell is uniformly provided with a plurality of furnace body bearings 11 supported on the horizontal ground, the whole furnace body is of a semi-underground type, the furnace body 1 below the furnace body bearings 11 is positioned in a long trench dug in advance, a lifting type transporting vehicle for transporting workpieces is arranged in the trench, and the heated high-temperature workpieces and the transporting vehicle move in the trench. The arrangement can reduce the overall height, and improve the system safety while facilitating workpiece transfer.
A plurality of electric heaters 6 are arranged on the furnace top in the furnace body 1, and a plurality of electric heaters 6 are uniformly arranged along the edge in the furnace top according to the power of the furnace body.
The furnace top is also provided with a circulating fan system 2, so that gas in the furnace body 1 is circulated, specifically, low-temperature gas exhausted from the top of the inner hearth to be described later is sucked to the outer side of the inner hearth to be heated, and then enters the inner hearth again to heat workpieces in the inner hearth. It includes 5 circulating fans, sets up on the furnace roof of 6 insides of electric heater. Wherein the first circulating fan is arranged in the middle of the furnace top, the second to the fifth circulating fans are uniformly arranged around the first circulating fan, the second to the fifth circulating fans are high-speed high-power circulating fans with 90KW, the air outlets of the second to the fifth circulating fans are arranged towards the inner wall of the furnace body, so that the discharged low-temperature gas is heated by the electric heater 6 on the furnace top, the air suction ports are vertically downward and respectively correspond to the air outlets on the inner hearth 5, the second to the fifth circulating fans respectively correspond to a heating zone in the furnace body 1, the first circulating fan serving as a small volute fan is arranged in the middle of the second to the fifth circulating fans and used for supplementing gas, the air suction ports are also vertically downward and are opposite to the air outlet at the top of the inner hearth 5, the air outlets of the first circulating fans are arranged towards the inner wall of the furnace body, the low-temperature gas heated by the workpieces in the inner hearth 5 is sucked out and then flows, the gas circulation in the inner hearth 5 is enhanced.
A cylindrical inner hearth 5 is also arranged in the furnace body 1, and the bottom of the inner hearth 5 is open, so that a workpiece to be heated can be conveniently placed into the inner hearth 5 from the lower part; the upper part of the inner hearth 5 is fixedly connected with the top of the furnace body 1, and the electric heater 6 is more specifically arranged on the top of the furnace outside the inner hearth 5; the top in the inner hearth 5 is provided with a furnace lifting appliance 8, as shown in fig. 3, the special material rack for lifting and containing the workpieces by the transfer vehicle is buckled with the lower buckle of the furnace lifting appliance 8, and the workpieces in the inner hearth 5 can be hung; the top of the inner hearth 5 is provided with 5 air outlets, wherein four air outlets are respectively opposite to the air suction openings of the second to the fifth circulating fans, one air outlet is opposite to the air suction opening of the first circulating fan, a plurality of layers of air inlets are arranged on the side wall of the inner hearth 5 from top to bottom, and a plurality of air inlets are arranged at intervals on each layer.
Because 5 fans are used for centralized parallel operation, the fan interval is small, air flows among the fans are easy to interfere with each other, the wind resistance is large, the air volume stagnation can occur, the gas flow field in the furnace body 1 is deteriorated, and the temperature uniformity is reduced rapidly.
As shown in fig. 4, the gas circulation diversion system 7 includes first to third arc-shaped diversion plates 71 to 73 which are arranged in the air outlet 21 of the second to fifth circulating fans, extend out of the air outlet 21 and are fixedly connected with the top of the furnace, so as to divide each air outlet 21 of the second to fifth circulating fans into 4 air outlet branches, namely, a first air outlet branch formed by the first side 22 of the air outlet 21 and the first arc-shaped diversion plate 71, a second air outlet branch formed by the first and second arc- shaped diversion plates 71,72, a third air outlet branch formed by the second and third arc-shaped diversion plates 72,73, and a fourth air outlet branch formed by the third arc-shaped diversion plate 73 and the second side 23 of the air outlet 21. The first to third arc-shaped guide plates 71 to 73 are arc-shaped steel plates, and each air outlet branch opening gradually widens from the air outlet 21 side to the outside, so that the eddy formed in the process that the airflow is discharged from the first to fourth air outlet branch openings and turns to the first and second vertical air ducts can be reduced.
In order to ensure that the air flows among the circulating fans are not interfered with each other, a first straight guide plate 74 and a second straight guide plate 75 which are connected with the inner hearth 5 and the furnace body 1 are vertically arranged on two sides of each air outlet of the second circulating fan to the fifth circulating fan, wherein the upper end of the first straight guide plate 74 is connected with the first side edge 22 of the air outlet 21, and the upper end of the second straight guide plate 75 is connected with the second side edge 23 of the air outlet 21. A third straight guide plate 76 for connecting the inner hearth 5 and the furnace body 1 is further arranged between the first straight guide plate 74 and the second straight guide plate 75, the upper end of the third straight guide plate 76 is connected with the second arc-shaped guide plate 72, the first straight guide plate 74 and the second straight guide plate 75, the inner side of the furnace body 1 and the outer side of the inner hearth 5 form a first vertical air duct, the second straight guide plate 75 and the third straight guide plate 76, the inner side of the furnace body 1 and the outer side of the inner hearth 5 form a second vertical air duct, air blown out from the first air outlet and the second air outlet is heated by the electric heater 6 and then enters the first vertical air duct to vertically flow downwards, and enters the inner hearth 5 from a plurality of upper and lower air inlets on the inner hearth 5 in the downward flowing process to heat workpieces in the inner hearth 5; similarly, the air blown out from the third air outlet branch and the fourth air outlet branch enters the second vertical air duct after being heated by the electric heater 6 to vertically flow downwards, and enters the inner hearth 5 from the upper and lower air inlets on the inner hearth 5 in the process of flowing downwards so as to heat the workpieces in the inner hearth 5. The first to the third straight guide plates limit the heated gas to flow only in the vertical air channel, so that mutual interference among fans is prevented; the air blown out from the air outlet of each circulating fan enters the first vertical air channel through the first air outlet branch port and the second air outlet branch port and enters the second vertical air channel through the third air outlet branch port and the fourth air outlet branch port, so that the air blown out from each fan is controlled to be uniformly heated, the power settings of each fan and the electric heater 6 are consistent, and the temperature of the air in the furnace body 1 is controlled to be consistent.
An arc-shaped flow deflector is further arranged on the lower side of each layer of air inlet along the height direction of the inner hearth wall on the inner side of the furnace body 1 and the outer side of the inner hearth 5, and the heated air flow is guided to enter the inner hearth 5 from the air inlets with different heights of the inner hearth 5 to uniformly heat the workpiece. The air quantity entering different areas of the inner hearth 5 is reasonably controlled by the layered drainage device provided with the flow deflectors, so that the uniformity of the furnace temperature in the hearth is effectively improved. The controller, the temperature measuring couple, the circulating fan and the heater form a closed-loop temperature measuring system, and the temperature in the furnace body can be accurately controlled to be maintained at a set temperature, so that the heating workpiece is heated uniformly, and the rate of the workpiece is high.
The furnace body 1 is also internally provided with a closed-loop temperature measuring system which comprises a temperature measuring couple (not shown) and a controller, wherein the temperature measuring couple is arranged in the furnace body 1 and is used for detecting the temperature in the furnace body 1, the controller is used for controlling the power of the electric heater 6 and the power of the first to fifth circulating fans according to the detected temperature, and when the temperature is too high, the power of the electric heater 6 is reduced or the power of the first to fifth circulating fans is increased, or vice versa, so that the temperature in the furnace body 1 is controlled at the set temperature.
The invention uses 5 circulating fans to work simultaneously, especially the second to fifth circulating fans and the electric heater 6 correspondingly arranged on the furnace top are respectively responsible for the hot air circulation of one area in the furnace body 1, and a gas circulation diversion system 7 is used for preventing the mutual interference of air flows among the fans, thereby realizing the strong hot air circulation in the furnace chamber and the uniform temperature in the furnace body 1; the multilayer flow deflectors are utilized to guide gas with uniform temperature to enter the inner hearth 5 to uniformly heat the workpiece. In addition, the closed-loop temperature measuring system is used for keeping the temperature in the furnace body 1 at the set temperature all the time, so that the heating workpiece reaches the temperature required by the process.
The heating principle and the heating process in the furnace body 1 will be explained in detail below:
when the heating furnace works, preheating is firstly carried out in advance, and after the heating furnace is heated to the temperature required by the process, the furnace door at the bottom of the furnace body 1 is driven by the furnace door opening and closing structure to be quickly opened towards two sides along the furnace door moving track 4.
The lifting and transporting vehicle for loading the material tray and the workpieces is transported to the bottom of the furnace body 1 in the trench, a lifting system of the transporting vehicle is lifted, the workpieces and the material tray are buckled on a buckle of a lifting appliance 8 in the furnace, then the heating furnace is withdrawn, the side-by-side furnace door is closed, and the workpieces are heated.
The second to fifth circulating fans suck low-temperature gas in the furnace body 1 through the suction inlet 24 opposite to the air outlet at the top of the inner hearth, the low-temperature gas is blown out from the air outlet 21 through the fan blade grids, high-speed airflow blown out from the air outlet 21 is equally divided by the first to third arc-shaped guide plates, the low-temperature gas enters the first vertical air channel after being blown out from the first and second air outlets, the high-speed airflow enters the second vertical air channel after being blown out from the third and fourth air outlets, and the low-temperature gas is heated and warmed by the electric heater 6 in the first and second vertical air channels to form hot air. The air enters the inner hearth through the upper and lower air inlets on the inner hearth under the guidance of the flow deflectors, so that the temperature in the inner hearth is uniform up and down.
And (4) heating the workpiece to the temperature required by the process, opening the furnace door, and transferring the workpiece and the material tray to the next working procedure position by the transfer vehicle for subsequent processing.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
The embodiment described above can heat large ring pieces, and can also heat other large workpieces, as long as the large workpieces are suspended in the inner hearth.
The heater may be an electromagnetic heater, a duct heater, an air heater, or the like, in addition to the electric heater 6 described above.
Claims (8)
1. A large-scale workpiece heating furnace comprises a furnace body (1) with an opening at the lower end and an inner hearth (5) which is arranged in the furnace body (1), the upper end of the inner hearth is fixedly connected with the top of the furnace body (1), and the lower end of the inner hearth is open,
a first space is formed between the top of the inner hearth (5) and the furnace body (1), and a second space is formed between the side wall of the inner hearth (5) and the furnace body (1);
the circulating fans are arranged at the top of the furnace body (1), an air suction opening (24) of each circulating fan is communicated with an air outlet on the top of the inner hearth (5), the air outlets of the circulating fans are arranged in the first space towards the inner side of the furnace body (1), and the first space corresponding to the air outlets of the circulating fans is uniformly divided into a plurality of first subspaces;
at least one heater (6) is arranged in the first subspace;
the gas circulation flow guide system (7) comprises a first straight flow guide plate (74) and a second straight flow guide plate (75) which are arranged at two sides of an air outlet of each circulating fan in the second space, and the second space is uniformly divided into a plurality of second subspaces; the first subspace and the second subspace corresponding to the same circulating fan are communicated;
and an air inlet is formed in the side wall of the inner hearth (5) corresponding to the second subspace.
2. The furnace according to claim 1, characterized in that said gas circulation diversion system (7) further comprises
And one end of each arc-shaped guide plate is arranged in the air outlet of the circulating fan, the other end of each arc-shaped guide plate extends to the second subspace, the air outlet of the circulating fan in the first subspace is divided into a plurality of air outlet branch openings, and the air outlet branch openings are gradually widened outwards in the air outlet side direction.
3. The heating furnace according to claim 2, wherein the number of said arc-shaped baffles is three, namely a first, a second and a third arc-shaped baffles (71,72, 73);
a third straight guide plate (76) connected with the other end of the second arc-shaped guide plate (72) is arranged between the first straight guide plate and the second straight guide plate (74,75) in the second subspace.
4. The heating furnace according to claim 1 or 3, wherein the circulating fan is a second, third, fourth or fifth circulating fan, and a first circulating fan is further provided on the furnace roof in the middle of the second, third, fourth or fifth circulating fan in the first space.
5. A furnace according to claim 4, characterized in that a deflector is arranged in the second subspace below the air inlet of the inner furnace (5).
6. The heating furnace according to claim 1, further comprising a controller and a temperature measuring couple arranged in the furnace body (1), wherein the controller controls the circulating fan and the heater (6) according to the temperature detected by the temperature measuring couple.
7. The furnace according to claim 1, characterized in that a plurality of furnace body supports (11) supported on a horizontal ground are uniformly provided on the outer side wall of the furnace body (1).
8. The heating furnace according to claim 1, characterized in that the doors of the furnace body (1) are arranged at the bottom and are split.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295765.8A CN111551028A (en) | 2020-04-15 | 2020-04-15 | Large-scale workpiece heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295765.8A CN111551028A (en) | 2020-04-15 | 2020-04-15 | Large-scale workpiece heating furnace |
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| CN111551028A true CN111551028A (en) | 2020-08-18 |
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| CN202010295765.8A Pending CN111551028A (en) | 2020-04-15 | 2020-04-15 | Large-scale workpiece heating furnace |
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| GB1419308A (en) * | 1972-02-23 | 1975-12-31 | Ugine Infra | Heat treatment furnace |
| CN102978364A (en) * | 2012-11-14 | 2013-03-20 | 苏州新长光热能科技有限公司 | Double-chamber single air suction type guiding device |
| CN103557705A (en) * | 2013-11-22 | 2014-02-05 | 苏州新长光热能科技有限公司 | Aluminum slab ingot pit type heating furnace with soaking function |
| WO2016156921A1 (en) * | 2015-03-31 | 2016-10-06 | Siti - B&T Group S.P.A. | Firing kiln for ceramic products and the like |
| CN207619470U (en) * | 2017-12-14 | 2018-07-17 | 苏州中门子工业炉科技有限公司 | A kind of solid solution furnace of feed inlet and outlet band sealing gas curtain |
| CN210367787U (en) * | 2019-07-17 | 2020-04-21 | 艾伯纳工业炉(太仓)有限公司 | Box annealing furnace |
| CN110512157A (en) * | 2019-09-09 | 2019-11-29 | 斯默因热能科技(杭州)有限公司 | A kind of homogeneous furnace being heat-treated for aluminium bar and plate ingot |
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Application publication date: 20200818 |