A progressive electric heating furnace

Abstract

The invention discloses a progressive electric heating furnace, which relates to the technical field of metal heat treatment equipment, comprising a furnace shell, an evaporation mechanism, a heat exchange mechanism and a furnace chamber, wherein the evaporation mechanism is arranged on one side of the furnace shell, and one end of the evaporation mechanism is communicated with the interior of the furnace shell, a furnace chamber is arranged inside the furnace shell, an electromagnetic heating coil is embedded in the inner wall of the furnace chamber, the furnace shell is a box-type mechanism as a whole, furnace doors are installed at both ends of the furnace shell, observation ports are arranged on both sides of one end of the furnace shell, a heat exchange mechanism is arranged on the top of the furnace shell, and the device adopts progressive heating when in use, and by connecting an air inlet pipe with an external inert gas, the inert gas can enter into a cavity between the furnace shell and the furnace chamber through the air inlet pipe, and then be transported to the air outlet through a circuitous channel between the guide plates, and then enter into the furnace chamber through the air outlet, and the metal heat-treated in the furnace chamber can greatly reduce the influence of oxidation and decarburization under the protection of the inert gas.

Description

Technical Field

[0001] The invention relates to the technical field of metal heat treatment equipment, in particular to a progressive electric heating furnace. Background Art

[0002] The working principle of electric heating furnace is to convert electrical energy into thermal energy, and generate heat through electric heating elements to heat the medium or workpiece in the furnace. Common heating elements include resistance heaters, induction heaters, etc. Resistance heaters use current to pass through resistance wires to generate heat, while induction heaters use alternating electromagnetic fields to generate induced current in conductors, causing the conductors themselves to heat up.

[0003] After searching, the Chinese patent publication number CN103103316A discloses a progressive electric heating furnace in the field of heat treatment heating furnaces. Although the heating furnace adopts multiple furnace zones to achieve a gradual increase in temperature, which not only effectively reduces the energy consumption of the entire furnace during application, but also effectively avoids the deformation or cracking of metal parts that may occur when they first enter the furnace, the metal parts inside the furnace are easily oxidized by oxygen at high temperatures to form oxide scales, which affects product quality; carbon steel or other carbon-containing materials may undergo decarburization during the heat treatment process, resulting in a decrease in the carbon content on the surface of the material, affecting the hardness and strength of the material;

[0004] The low temperature area of ​​the existing electric heating furnace is heated mainly by electric heating. Although this method can provide the required heat, it will also lead to high energy consumption. In order to maintain the temperature of the low temperature area, the low temperature area needs to be continuously heated, which greatly increases the cost of use. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a progressive electric heating furnace, which solves the problem that the prior art device mentioned in the background art is prone to oxidation and decarburization during the processing of technical parts and has a high cost of use.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a progressive electric heating furnace, comprising a furnace shell, an evaporation mechanism, a heat exchange mechanism and a furnace chamber, an evaporation mechanism is arranged on one side of the furnace shell, one end of the evaporation mechanism is communicated with the interior of the furnace shell, a furnace chamber is arranged inside the furnace shell, an electromagnetic heating coil is embedded in the inner wall of the furnace chamber, the furnace shell as a whole is a box-type mechanism, furnace doors are installed at both ends of the furnace shell, observation ports are arranged on both sides of one end of the furnace shell, the observation ports are communicated with the interior of the furnace chamber for observing the interior of the furnace chamber, a heat exchange mechanism is arranged on the top of the furnace shell, the heat exchange mechanism is used to discharge excess air inside the furnace chamber, and the other end of the heat exchange mechanism is communicated with the interior of the furnace chamber, the heat exchange mechanism comprises an exhaust mechanism and an air intake mechanism, the air intake mechanism is installed inside the exhaust mechanism, the other end of the exhaust mechanism is communicated with an external inert gas source, one end of the exhaust mechanism is communicated with a low-temperature area inside the furnace chamber, the interior of the furnace chamber is a multi-stage structure, and the end of the furnace chamber away from the exhaust is a high-temperature area.

[0007] Preferably, the exhaust mechanism includes an exhaust pipe, a rectangular hole groove is opened at the top of one end of the furnace, and the hole groove is connected to the bottom of one end of the exhaust pipe, and the other end of the exhaust pipe extends to the other end of the top of the furnace shell. By opening a rectangular hole groove at the top of one end of the furnace and connecting it to the bottom of one end of the exhaust pipe, excess air in the furnace can be discharged in time, which is beneficial to maintaining the air pressure balance and gas composition stability in the furnace, especially when performing processes with high requirements on the atmosphere such as heat treatment, the smooth progress of the process can be ensured. The exhaust pipe is set at the top of the furnace, and the rising hot air flow in the furnace can be used to naturally bring heat to the vicinity of the exhaust pipe, so that the exhaust process itself is also involved in the heat transfer process. Compared with other possible exhaust positions, this method can reduce the ineffective heat loss to a certain extent.

[0008] Preferably, the air intake mechanism comprises an air intake pipe, one end of the air intake pipe is connected to an external inert gas, a fin is welded to an outer wall of the air intake pipe, one end of the fin is welded to the outer wall of the air intake pipe, and the other end of the fin is welded to an inner wall of the exhaust pipe, there is a gap between the exhaust pipe and the air intake pipe, the air intake pipe is inserted into the exhaust pipe, and the other end of the air intake pipe passes through the end of the exhaust pipe, the other end of the air intake pipe is connected to an input end of an air intake valve, and an output end of the air intake valve is connected to the inside of a furnace shell, and by connecting the air intake pipe to an external inert gas (such as nitrogen, argon, etc.), the inert gas can enter the interior of the furnace to form a protective atmosphere, which effectively prevents metal parts from being damaged at high temperatures. At low temperature, the fins react with oxygen to form oxide scale, which also avoids decarburization of carbon steel or other carbon-containing materials during heat treatment, thereby maintaining the hardness and strength of the material and significantly improving product quality. When the inert gas enters through the intake pipe, the fins can increase the contact area between the gas and the inner wall of the exhaust pipe, thereby transferring the heat of the air with waste heat in the exhaust pipe to the inert gas in the intake pipe through heat conduction to achieve preheating. When the preheated inert gas enters the furnace, the temperature is closer to the internal temperature of the furnace, reducing the impact of temperature fluctuations inside the furnace, while improving the utilization rate of the waste heat of the exhaust gas inside the furnace and reducing energy consumption.

[0009] Preferably, the portion of the air intake pipe located in the inner area of ​​the exhaust pipe is made of copper-aluminum composite material, and the material of the fins on the outer wall of the exhaust pipe is the same as that of the air intake pipe. The fins are in the shape of long strips, and are distributed in a circular shape with equal intervals on the outside of the air intake pipe, and there is a gap between one end of the fin and the end of the exhaust pipe. The fins not only play a role in heat exchange, but also enhance the structural strength between the air intake pipe and the exhaust pipe, ensuring the stability and reliability of the entire air intake mechanism, so that the air intake mechanism can operate stably for a long time under high temperature and high pressure environment, reducing maintenance costs and failure rates. By preheating the inert gas, the temperature of the gas entering the furnace is higher, reducing the dependence of the low-temperature area inside the furnace on electric heating, and the excess air in the high-temperature area flows to the low-temperature area, further improving the thermal insulation effect of the low-temperature area, reducing the energy consumption of electric heating, and significantly reducing the cost of use.

[0010] Preferably, there is a gap between the inner wall of the furnace shell and the outer wall of the furnace, and a guide plate is arranged between the furnace and the furnace shell, the guide plate is in a U-shaped structure, a plurality of the guide plates are arranged, and the guide plates are regularly distributed in a straight line with equal spacing, the guide plates are in a staggered structure with respect to each other, the guide plates are respectively welded to the furnace and the furnace shell, the two sides of the outside of the furnace and the top form a circuitous channel through the guide plates, and the inner wall of the furnace near the high temperature area at one end is provided with air outlets, and the air outlets are evenly distributed from top to bottom for discharging inert gas The furnace shell has a body, so that a circuitous channel is formed on the two sides and the top of the furnace through the guide plate. The circuitous channel can effectively extend the flow path of the inert gas between the furnace shell and the furnace, ensuring that the inert gas has enough time to be preheated before entering the furnace, and also helps to evenly distribute the inert gas in the furnace. Gas outlets are arranged on both sides of the inner wall at one end of the furnace near the high temperature area, and the gas outlets are evenly distributed from top to bottom, ensuring that the preheated inert gas can evenly enter the furnace, further improving the uniformity and stability of the heating process.

[0011] Preferably, the evaporation mechanism comprises a water tank, a solenoid valve is installed at one end of the bottom of the water tank, the solenoid valve is electrically connected to the remote control terminal, and the interior of the solenoid valve is connected to an external water source, the middle of the water tank is connected to the input end of the control valve, the output end of the control valve is connected to a connecting pipe, and the other end of the connecting pipe is connected to a partition, wherein a liquid level sensor is arranged inside the water tank for monitoring the liquid level inside the water tank and controlling water inlet, and the water vapor enters the interior of the furnace through the hole groove at one end of the top of the partition, providing a humid environment, and the presence of water vapor can reduce the direct contact between the metal surface and the atmosphere in the furnace, thereby The risk of decarburization is reduced in one step. Water vapor is relatively stable at high temperatures and will not undergo a strong oxidation reaction with metals like oxygen. It can effectively isolate oxygen, prevent the metal surface from being oxidized, and maintain the original performance and surface quality of the metal. A liquid level sensor is installed inside the water tank to monitor the liquid level inside the water tank. When the water level is lower than the set value, the liquid level sensor will send a signal to the remote control terminal. The remote control terminal controls the water inlet of the external water source through the solenoid valve to ensure that there is always enough water in the water tank. In order to further reduce the impact of water temperature on the temperature inside the furnace, hot water is used at the water inlet of the water tank.

[0012] Preferably, seven partitions are provided, and the partitions are distributed inside the furnace in a straight line and at equal intervals, and the partitions are welded to the inside of the furnace. The partitions are hollow structures, and holes are evenly distributed on both sides of one end of the top of the partition. The hollow structure of the partition is not only used for water evaporation, but also increases the heat exchange area inside the furnace. When water evaporates inside the partition, it absorbs heat, thereby lowering the temperature inside the partition, which helps to balance the temperature distribution in the furnace, reduce local overheating, and further improve the uniformity and stability of the heating process.

[0013] Preferably, a reflecting plate is welded to the top of the interior of the furnace, the reflecting plates are distributed in a straight line with equal spacing, and the surface of the reflecting plate has a multi-bend structure, the surface of the reflecting plate is made of aluminum alloy, and the surface of the reflecting plate is mirror-like. The mirror-like surface of the reflecting plate can effectively reflect the heat in the furnace, so that the heat in the furnace can be reflected multiple times, thereby reducing heat loss and improving the thermal efficiency in the furnace, especially for the heat generated by the electromagnetic heating coil, the reflecting plate can reflect the heat back to the interior of the furnace, ensuring that the heat is fully utilized and reducing energy waste. The surface of the reflecting plate has a multi-bend structure, and this design can evenly reflect the heat to every corner of the furnace, and the multi-bend structure increases the complexity of the reflecting surface, so that the heat is reflected multiple times in the furnace, thereby achieving more uniform heat distribution. This not only improves the uniformity of the heating process, but also reduces the phenomenon of local overheating or overcooling, ensures that the metal parts are heated evenly in the furnace, and improves product quality. The reflector is made of aluminum alloy, which not only has good reflective properties, but also has high mechanical strength and high temperature resistance. The reflector made of aluminum alloy can operate stably for a long time in a high temperature environment, reducing the problem of decreased reflection effect due to material aging or deformation, and ensuring the long-term stability and reliability of the equipment.

[0014] Preferably, the furnace shell adopts a multi-layer composite structure, which is respectively composed of high-reflectivity material, expanded perlite, aluminum silicate felt, waterproof coiled material and aluminum alloy material. Expanded perlite is a lightweight, porous thermal insulation material with good thermal insulation properties. It can effectively prevent heat conduction and reduce the heat in the furnace from being dissipated to the external environment through the furnace shell, thereby maintaining a high temperature in the furnace and improving heating efficiency.

[0015] The present invention provides a progressive electric heating furnace, which has the following beneficial effects:

[0016] (1) A progressive electric heating furnace, when in use, adopts a progressive heating method, and by connecting an air inlet pipe to an external inert gas, the inert gas can enter the cavity between the furnace shell and the furnace through the air inlet pipe, and then be transported to the air outlet through a circuitous channel between the guide plates, and then enter the furnace through the air outlet. The metal heat treated in the furnace can be greatly reduced under the protection of the inert gas. The influence of oxidation and decarburization.

[0017] (2) In this progressive electric heating furnace, after the inert gas enters the furnace, the excess high-temperature air in the furnace will flow to the low-temperature area, thereby reducing the dependence of the low-temperature area in the furnace on electric heating. Part of the air in the high-temperature area will flow to the low-temperature area, thereby maintaining the temperature of the low-temperature area. After heating the low-temperature area, the excess air will enter the exhaust pipe through the holes and grooves on the top of the furnace and be discharged.

[0018] (3) In this progressive electric heating furnace, when the inert gas flows inside the air inlet pipe, the air inlet pipe can exchange heat with the air with waste heat inside the exhaust pipe through the fins, thereby preheating the inert gas inside the air inlet pipe. When the preheated inert gas enters the circuitous passage outside the furnace, it can be preheated again with the temperature of the outer wall of the furnace. When the inert gas that has undergone secondary preheating is discharged into the furnace through the air outlet, the impact on the temperature inside the furnace can be reduced, thereby preventing the low-temperature inert gas from directly entering the furnace and causing fluctuations in the temperature inside the furnace. At the same time, the utilization rate of the waste heat of the exhaust gas inside the furnace can be improved.

[0019] (4) In this progressive electric heating furnace, the water in the water tank can enter the partition through the connecting pipe, so that the water in the partition can evaporate under the action of the high temperature inside the furnace, and then the evaporated water vapor can enter the furnace through the hole groove at one end of the top of the partition. The presence of water vapor can provide a humid environment, reduce the direct contact between the metal surface and the atmosphere in the furnace, and further reduce the risk of decarburization. Water vapor is relatively stable at high temperature and will not undergo a strong oxidation reaction with the metal like oxygen. During the metal heat treatment process, the furnace is filled with water vapor, which can effectively isolate oxygen and prevent the metal surface from being oxidized, thereby maintaining the original performance and surface quality of the metal.

[0020] This solves the problem that the existing device is prone to oxidation and decarburization during the processing of technical parts and has a high use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the furnace structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0024] Figure 4 It is a side view structural schematic diagram of the present invention;

[0025] Figure 5 It is a schematic diagram of the side structure of the guide plate of the present invention;

[0026] Figure 6 It is a schematic diagram of the partition structure of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the present invention;

[0028] Figure 8 It is a schematic diagram of the fin structure of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the reflection plate of the present invention.

[0030] In the figure, 1. furnace shell; 2. evaporation mechanism; 201. water tank; 202. solenoid valve; 203. control valve; 204. connecting pipe; 205. partition; 3. heat exchange mechanism; 301. air inlet pipe; 302. fin; 303. air inlet valve; 304. guide plate; 305. air outlet; 306. exhaust pipe; 4. observation port; 5. furnace door; 6. furnace chamber; 7. reflection plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] See also Figure 1-9, the embodiment of the present invention provides a technical solution: a progressive electric heating furnace, comprising a furnace shell 1, an evaporation mechanism 2, a heat exchange mechanism 3 and a furnace 6, the evaporation mechanism 2 is arranged on one side of the furnace shell 1, one end of the evaporation mechanism 2 is communicated with the interior of the furnace shell 1, a furnace 6 is arranged inside the furnace shell 1, an electromagnetic heating coil is embedded in the inner wall of the furnace 6, the furnace shell 1 is a box-type mechanism as a whole, furnace doors 5 are installed at both ends of the furnace shell 1, observation ports 4 are arranged on both sides of one end of the furnace shell 1, the observation ports 4 are communicated with the interior of the furnace 6 for observing the interior of the furnace 6, a heat exchange mechanism 3 is arranged on the top of the furnace shell 1, the heat exchange mechanism 3 is used to discharge excess air inside the furnace 6, and the other end of the heat exchange mechanism 3 is communicated with the interior of the furnace 6, the heat exchange mechanism 3 includes an exhaust mechanism and an air intake mechanism, the air intake mechanism is installed inside the exhaust mechanism, the other end of the exhaust mechanism is communicated with an external inert gas source, one end of the exhaust mechanism is communicated with the low-temperature area inside the furnace 6, the interior of the furnace 6 is a multi-stage structure, and the interior of the furnace 6 The end away from the exhaust is a high temperature area, the exhaust mechanism includes an exhaust pipe 306, a rectangular hole groove is opened on the top of one end of the furnace 6, and the hole groove is connected to the bottom of one end of the exhaust pipe 306, and the other end of the exhaust pipe 306 extends to the other end of the top of the furnace shell 1, and the air intake mechanism includes an air intake pipe 301, one end of the air intake pipe 301 is connected to the external inert gas, and the outer wall of the air intake pipe 301 is welded with a fin 302, one end of the fin 302 is welded to the outer wall of the air intake pipe 301, and the fin 3 02, the other end is welded to the inner wall of the exhaust pipe 306, there is a gap between the exhaust pipe 306 and the intake pipe 301, the intake pipe 301 is inserted into the exhaust pipe 306, and the other end of the intake pipe 301 passes through the end of the exhaust pipe 306, the other end of the intake pipe 301 is connected to the input end of the intake valve 303, the output end of the intake valve 303 is connected to the inside of the furnace shell 1, the inside of the furnace 6 is a multi-stage structure, the end away from the exhaust is a high temperature area, and the end close to the exhaust is a low temperature area. This design allows metal parts to first contact the low temperature area when entering the furnace 6, and gradually enter the higher temperature area as the parts move in the furnace 6. This gradual heating method effectively avoids the thermal stress caused by sudden heating of metal parts at high temperatures, reduces the risk of deformation and cracking, and improves the heat treatment quality of parts. After the inert gas enters the furnace 6, the excess high-temperature air inside the furnace 6 will flow to the low-temperature area, thereby reducing the dependence on electric heating in the low-temperature area inside the furnace 6. Part of the air in the high-temperature area flows to the low-temperature area, thereby keeping the temperature of the low-temperature area warm. After heating the low-temperature area, the excess air will enter the exhaust pipe 306 through the holes on the top of the furnace 6 and be discharged.

[0034] Embodiment 2:

[0035] The embodiment of the present invention provides a technical solution: a progressive electric heating furnace, wherein the air inlet pipe 301 is located in the inner area of ​​the exhaust pipe 306 and is made of a copper-aluminum composite material, and the material of the fin 302 on the outer wall of the exhaust pipe 306 is the same as that of the air inlet pipe 301, the fin 302 is in the shape of a long strip, and the fin 302 is regularly distributed on the outside of the air inlet pipe 301 in a circular shape with equal spacing, and there is a gap between one end of the fin 302 and the end of the exhaust pipe 306, there is a gap between the inner wall of the furnace shell 1 and the outer wall of the furnace chamber 6, and a guide plate 304 is arranged between the furnace chamber 6 and the furnace shell 1, the guide plate 304 is in a U-shaped structure, a plurality of guide plates 304 are arranged, and the guide plates 304 are regularly distributed in a straight line with equal spacing, the guide plates 304 are staggered with each other, the guide plates 304 are respectively welded to the furnace chamber 6 and the furnace shell 1, and the two sides of the outside of the furnace chamber 6 and the top are connected by the guide plates 30 4 forms a circuitous passage, and both sides of the inner wall of one end of the furnace 6 near the high temperature area are provided with air outlets 305, and the air outlets 305 are evenly distributed from top to bottom for discharging the inert gas. When the inert gas flows in the air inlet pipe 301, the air inlet pipe 301 can exchange heat with the air with waste heat in the exhaust pipe 306 through the fins 302, so that the inert gas in the air inlet pipe 301 can be preheated. When the preheated inert gas enters the circuitous passage outside the furnace 6, it can be preheated twice with the temperature of the outer wall of the furnace 6. When the inert gas after the secondary preheating is discharged into the furnace 6 through the air outlet 305, the influence on the temperature inside the furnace 6 can be reduced, and the inert gas with lower temperature can be prevented from directly entering the furnace 6 to cause fluctuation of the temperature inside the furnace 6, and at the same time, the utilization rate of the waste heat of the exhaust gas in the furnace 6 can be improved.

[0036] Embodiment 3:

[0037] The embodiment of the present invention provides a technical solution: a progressive electric heating furnace, the evaporation mechanism 2 includes a water tank 201, a solenoid valve 202 is installed at one end of the bottom of the water tank 201, the solenoid valve 202 is electrically connected to the remote control terminal, and the inside of the solenoid valve 202 is connected to the external water source, the middle of the water tank 201 is connected to the input end of the control valve 203, the output end of the control valve 203 is connected to the connecting pipe 204, and the other end of the connecting pipe 204 is connected to the partition 205, the partition 205 is provided with seven partitions, the partitions 205 are distributed in a straight line with equal spacing inside the furnace 6, and the partitions 205 are welded to the inside of the furnace 6, the partitions 205 are hollow, and the top end of the partition 205 is evenly distributed on both sides. There are holes and grooves, and the water inside the water tank 201 can enter the partition 205 through the connecting pipe 204, so that the water inside the partition 205 can evaporate under the action of the high temperature inside the furnace 6, and then the evaporated water vapor can enter the furnace 6 through the holes and grooves at one end of the top of the partition 205. The presence of water vapor can provide a humid environment, reduce the direct contact between the metal surface and the atmosphere in the furnace, thereby further reducing the risk of decarburization. Water vapor is relatively stable at high temperatures and will not undergo a strong oxidation reaction with the metal like oxygen. During the metal heat treatment process, the furnace is filled with water vapor, which can effectively isolate oxygen and prevent the metal surface from being oxidized, thereby maintaining the original performance and surface quality of the metal.

[0038] Embodiment 4:

[0039] The embodiment of the present invention provides a technical solution: a progressive electric heating furnace, a reflecting plate 7 is welded on the top of the furnace chamber 6, the reflecting plates 7 are distributed in a straight line with equal spacing, and the surface of the reflecting plate 7 is a multi-bend structure, the surface of the reflecting plate 7 is made of aluminum alloy, and the surface of the reflecting plate 7 is mirror-like, the furnace shell 1 adopts a multi-layer composite structure, which is respectively composed of high-reflectivity material, expanded perlite, aluminum silicate felt, waterproof coiled material and aluminum alloy material. Expanded perlite is a lightweight, porous thermal insulation material with good thermal insulation performance, which can effectively prevent heat conduction and reduce the heat in the furnace chamber from being lost to the external environment through the furnace shell, thereby maintaining the high temperature state in the furnace chamber and improving the heating efficiency. The surface of the reflecting plate 7 is mirror-like, which can effectively reflect the heat in the furnace chamber 6, so that the heat in the furnace chamber 6 can be reflected multiple times, reducing the loss of heat and improving the thermal efficiency in the furnace chamber 6, especially for electromagnetic The reflective plate 7 can reflect the heat generated by the heating coil back into the furnace 6, ensuring that the heat is fully utilized and reducing energy waste. The surface of the reflective plate 7 has a multi-bend structure, which can evenly reflect the heat to every corner of the furnace 6. The multi-bend structure increases the complexity of the reflective surface, allowing the heat to be reflected multiple times in the furnace 6, thereby achieving a more uniform heat distribution, which not only improves the uniformity of the heating process, but also reduces the phenomenon of local overheating or overcooling, ensuring that the metal parts are heated evenly in the furnace 6, and improving product quality. The reflective plate 7 is made of aluminum alloy, which not only has good reflective properties, but also has high mechanical strength and high temperature resistance. The reflective plate 7 made of aluminum alloy can operate stably for a long time in a high temperature environment, reducing the problem of decreased reflection effect due to material aging or deformation, and ensuring the long-term stability and reliability of the equipment.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A progressive electric heating furnace, characterized in that: The invention comprises a furnace shell (1), an evaporation mechanism (2), a heat exchange mechanism (3) and a furnace (6); the evaporation mechanism (2) is arranged on one side of the furnace shell (1); one end of the evaporation mechanism (2) is connected to the interior of the furnace shell (1); a furnace (6) is arranged inside the furnace shell (1); an electromagnetic heating coil is embedded in the inner wall of the furnace (6); the furnace shell (1) is a box-type mechanism as a whole; furnace doors (5) are installed at both ends of the furnace shell (1); observation ports (4) are arranged on both sides of one end of the furnace shell (1); the observation ports (4) are connected to the interior of the furnace (6) and are used to observe the furnace. A heat exchange mechanism (3) is arranged on the top of the furnace shell (1) inside the furnace (6), the heat exchange mechanism (3) is used to discharge excess air inside the furnace (6), and the other end of the heat exchange mechanism (3) is connected to the inside of the furnace (6), the heat exchange mechanism (3) comprises an exhaust mechanism and an air intake mechanism, the air intake mechanism is installed inside the exhaust mechanism, the other end of the exhaust mechanism is connected to an external inert gas source, one end of the exhaust mechanism is connected to a low-temperature area inside the furnace (6), the interior of the furnace (6) is a multi-stage structure, and the interior of the furnace (6) away from the exhaust end is a high-temperature area.

2. A progressive electric heating furnace according to claim 1, characterized in that: The exhaust mechanism comprises an exhaust pipe (306), a rectangular hole groove is opened at the top of one end of the furnace (6), and the hole groove is connected to the bottom of one end of the exhaust pipe (306), and the other end of the exhaust pipe (306) extends to the other end of the top of the furnace shell (1).

3. The progressive electric heating furnace according to claim 1, characterized in that: The air intake mechanism comprises an air intake pipe (301), one end of the air intake pipe (301) is in communication with an external inert gas, a fin (302) is welded to the outer wall of the air intake pipe (301), one end of the fin (302) is welded to the outer wall of the air intake pipe (301), and the other end of the fin (302) is welded to the inner wall of an exhaust pipe (306), a gap exists between the exhaust pipe (306) and the air intake pipe (301), the air intake pipe (301) is inserted into the exhaust pipe (306), and the other end of the air intake pipe (301) passes through the end of the exhaust pipe (306), the other end of the air intake pipe (301) is in communication with an input end of an air intake valve (303), and the output end of the air intake valve (303) is in communication with the inside of a furnace shell (1).

4. A progressive electric heating furnace according to claim 3, characterized in that: The portion of the air intake pipe (301) located in the inner area of ​​the exhaust pipe (306) is made of a copper-aluminum composite material, and the material of the fins (302) on the outer wall of the exhaust pipe (306) is the same as that of the air intake pipe (301). The fins (302) are in the shape of long strips, and the fins (302) are regularly distributed in a circular shape with equal spacing outside the air intake pipe (301), and there is a gap between one end of the fin (302) and the end of the exhaust pipe (306).

5. The progressive electric heating furnace according to claim 1, characterized in that: There is a gap between the inner wall of the furnace shell (1) and the outer wall of the furnace (6), and a guide plate (304) is provided between the furnace (6) and the furnace shell (1), the guide plate (304) is in a U-shaped structure, a plurality of guide plates (304) are provided, and the guide plates (304) are regularly distributed in a straight line with equal spacing, and the guide plates (304) are in a staggered structure with respect to each other, the guide plates (304) are respectively welded to the furnace (6) and the furnace shell (1), and the two sides and the top of the outside of the furnace (6) form a circuitous channel through the guide plates (304), and gas outlets (305) are provided on both sides of the inner wall of one end of the furnace (6) close to the high-temperature area, and the gas outlets (305) are evenly distributed from top to bottom for discharging inert gas.

6. The progressive electric heating furnace according to claim 1, characterized in that: The evaporation mechanism (2) comprises a water tank (201), a solenoid valve (202) is installed at one end of the bottom of the water tank (201), the solenoid valve (202) is electrically connected to a remote control terminal, and the interior of the solenoid valve (202) is connected to an external water source, the middle of the water tank (201) is connected to an input end of a control valve (203), the output end of the control valve (203) is connected to a connecting pipe (204), and the other end of the connecting pipe (204) is connected to a partition (205).

7. The progressive electric heating furnace according to claim 5, characterized in that: Seven partitions (205) are provided, and the partitions (205) are distributed in a straight line at equal intervals inside the furnace (6). The partitions (205) are welded to the inside of the furnace (6). The partitions (205) are hollow in structure, and holes and grooves are evenly distributed on both sides of one end of the top of the partition (205).

8. The progressive electric heating furnace according to claim 1, characterized in that: A reflective plate (7) is welded to the top of the furnace (6); the reflective plates (7) are distributed in a straight line with equal spacing, and the surface of the reflective plate (7) has a multi-bend structure; the surface of the reflective plate (7) is made of aluminum alloy, and the surface of the reflective plate (7) is mirror-like.

9. The progressive electric heating furnace according to claim 1, characterized in that: The furnace shell (1) adopts a multi-layer composite structure, which is respectively composed of high reflectivity material, expanded perlite, aluminum silicate felt, waterproof coiled material and aluminum alloy material.

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