Intermittent temperature output type electric heating furnace for roller heat treatment process

Abstract

The invention discloses a temperature intermittent output type electric heating furnace for a roller heat treatment process, which relates to the technical field of roller heat treatment, is based on a conventional electric heating furnace structure, takes an electric heating assembly as a unique heat source, further limits the setting position of the electric heating assembly to change a heating area, and is characterized in that a temperature balance control unit is arranged; small-gradient temperature control is achieved, specifically, the flow mixing process of hot air is achieved on the basis of a temperature sensor, overheated gas blows out of the interior of a furnace body for natural cooling or forced air cooling, the problem of heat loss of a roller in the overheated state is avoided, temperature compensation is conducted on temperature loss gas in a similar way, and on this basis, the temperature of the roller is reduced. A special gas mixing cylinder is additionally arranged in the flow mixing process of hot gas flow, the relative position of a second rotating point in a movable blocking piece is changed through the rotating process, the essence is that the arrangement position of the movable blocking piece relative to an inner ring piece is changed, and settling of impurities such as fly ash in heat treatment tail gas is temporarily accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of roller heat treatment, in particular to a temperature intermittent output type electric heating furnace used in roller heat treatment process. Background Art

[0002] The temperature curve in the roller heat treatment process generally consists of six parts, namely ordinary heating section, preheating section, heating section, insulation section, cooling section and final temperature rise section. The common heating method is mainly based on electric heating furnace (electric heating effect or electromagnetic induction phenomenon). Its essence is to set the ambient temperature of corresponding values ​​based on process parameters, such as spheroidizing annealing temperature 790~820℃.

[0003] Explain according to the electric heating formula: the ambient temperature is proportional to one or more of the current intensity, resistance and heating time. Then, when the current intensity and resistance are in a constant state, during the continuous heating process, the actual temperature generated is far higher than the preset value. Excessively high heat treatment temperature may cause coarse austenite grains, thereby significantly reducing the mechanical properties of the material, and in severe cases, the material may even need to be scrapped. This phenomenon is collectively referred to as overheating or overburning. If the current intensity or resistance is reduced, insufficient temperature may also occur, which will also lead to reduced mechanical properties of the material. This application proposes a solution to this problem. Summary of the invention

[0004] The purpose of the present invention is to provide a temperature intermittent output electric heating furnace for a roller heat treatment process. The roller heat treatment process is described below. Due to the limitation of its heating method, the ambient temperature during the specific heating process may fluctuate, such as being too high / too low, which directly affects the mechanical properties of the roller and even causes the roller to be scrapped.

[0005] The object of the present invention can be achieved by the following technical scheme: a temperature intermittent output electric heating furnace for roller heat treatment process, comprising a furnace body and an electric heating assembly installed inside the furnace body, an air cooling assembly and a controller are installed outside the furnace body, and a return air pipeline system associated with the controller is arranged outside the furnace body, the return air pipeline system comprises an air mixing cylinder, a return air pipeline, a ventilation pipeline and a temperature sensor, and the return air pipeline matches the setting position of the air cooling assembly;

[0006] The return air duct is connected with the mixing cylinder and the ventilation duct. The mixing cylinder is installed on the furnace body. One end of the ventilation duct is connected with the inside of the furnace body. A ventilation wheel is rotatably installed inside the mixing cylinder. Two groups of inner ring sheets are installed on the ventilation wheel, and a movable blocking sheet is rotatably installed in the reversing wheel. The probe of the temperature sensor extends to the inside of the furnace body. The controller is provided with a temperature balance control unit.

[0007] It is further configured as follows: the electric heating assemblies are installed at positions on both sides of the inner wall of the furnace body, and the electric heating assemblies are linearly equidistantly arranged along the length direction of the furnace body, and the electric heating assemblies at positions on both sides of the inner wall of the furnace body are staggered along the width direction of the furnace body.

[0008] It is further configured as follows: an electric push rod is installed at the other end of the ventilation duct, a ceramic air blocking block is installed at the end of the output shaft of the electric push rod, and the ceramic air blocking block is arranged at one end of the ventilation duct.

[0009] It is further configured as follows: a motor assembly is installed on the furnace body, the output shaft of the motor assembly is connected to the center point of the reversing wheel, and an exhaust pipe is installed on the lower curved surface of the mixing cylinder.

[0010] It is further configured as follows: the outer curved surface of the inner ring piece matches the inner wall of the mixing cylinder, and a falling block is installed at the lower end of the movable blocking piece.

[0011] It is further configured that: the rotation point between the movable blocking piece and the reversing wheel is set as the second rotation point, the rotation point between the reversing wheel and the mixing cylinder is set as the first rotation point, and the setting position height of the second rotation point is lower than the setting position height of the first rotation point.

[0012] It is further configured that: the distance between the end of the movable blocking piece away from the falling block and the second rotation point is greater than the distance between the falling block and the second rotation point, and the width of the movable blocking piece is smaller than the inner diameter of the inner ring piece.

[0013] It is further configured as follows: the temperature balance control unit is composed of a parameter integration module, an environmental analysis module and an interactive control module. In the parameter integration module, the ambient temperature inside the furnace body and the output power of each electric heating assembly are collected by a temperature sensor, which are represented by Qt and Pt respectively, and the preset temperature values ​​Qmin and Qmax inside the furnace body are set according to the heat treatment process requirements of the roll;

[0014] The environmental analysis module performs environmental temperature simulation analysis based on Qt, Qmin and Qmax. The environmental temperature simulation analysis process includes the following contents:

[0015] When Qt<Qmin or Qt=Qmin, it means that the furnace is in a state of temperature loss;

[0016] When Qt>Qmax or Qt=Qmax, it means that the furnace is in an overheated state;

[0017] When Qmin<Qt<Qmax, it means that the inside of the furnace is in a normal state;

[0018] In the interactive control module, the calculation process of the ambient temperature base is established in the ambient temperature simulation analysis, with Mt Indicates the ambient temperature base, M t =(Qt-[Qmax·Qmin]) / [Qmax·Qmin], and an intermediate temperature threshold is added based on Qmin and Qmax: A=(Qmin+Qmax) / 2+10.5℃, and it is associated with the hypothermia state, overheating state, and normal state to perform heating actions, cooling actions, and exhaust actions.

[0019] The present invention has the following beneficial effects:

[0020] 1. Based on the structure of conventional electric heating furnace, the medium frequency heating method is not adopted because of its advantages (fast heating). The resistance heating principle of the electric heating assembly is mainly used. Specifically, the heat treatment process of the roller is not used because the temperature rises too fast and the temperature drops slowly. Therefore, the electric heating assembly is used as the only heat source. The setting position of the electric heating assembly is further limited to change the heating area. The superheated gas is mixed based on the internal temperature of the furnace body, and the superheated gas is naturally cooled or forced to be cooled by air to avoid the problem of heat loss of the roller under the overheated state. The temperature of the dehumidified gas can also be supplemented to avoid the temperature instability affecting the heat treatment efficiency.

[0021] 2. A special mixing cylinder is further added for the mixing process of the hot air flow. The mixing cylinder is mainly used to temporarily store the exhaust gas during the heat treatment process. Specifically, the flow process of the exhaust gas is realized during the rotation of the two sets of inner ring plates, and the relative position of the second rotation point in the movable plug is further changed during the rotation of the inner ring plates, so that the fly ash in the exhaust gas is "blocked" according to the movable plug, so as to temporarily accelerate the "sedimentation" of fly ash and other impurities in the heat treatment exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic structural diagram of a temperature intermittent output type electric heating furnace for roller heat treatment process proposed by the present invention;

[0024] Figure 2 A top cross-sectional view of a furnace body in a temperature intermittent output type electric heating furnace for a roller heat treatment process proposed by the present invention;

[0025] Figure 3 This is a schematic structural diagram of a return air pipeline system in a temperature intermittent output electric heating furnace for a roller heat treatment process proposed by the present invention;

[0026] Figure 4 It is a cross-sectional view of a gas mixing cylinder in a temperature intermittent output type electric heating furnace for a roller heat treatment process proposed by the present invention;

[0027] Figure 5 It is a side cross-sectional view of a gas mixing cylinder in a temperature intermittent output type electric heating furnace for a roller heat treatment process proposed by the present invention;

[0028] Figure 6 The present invention proposes a temperature intermittent output electric heating furnace for roller heat treatment process. Figure 5 Working bitmap.

[0029] In the figure: 1. furnace body; 2. return air duct; 3. air cooling assembly; 4. ventilation duct; 5. electric push rod; 6. controller; 7. electric heating assembly; 8. mixing cylinder; 9. motor assembly; 10. exhaust duct; 11. inner ring; 12. ceramic air blocking block; 13. reversing wheel; 14. movable blocking plate; 15. falling block. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0031] Embodiment 1: The heat treatment process of the roll is described. Due to the limitation of the heating method, the ambient temperature during the specific heating process may fluctuate, such as being too high / too low, which directly affects the mechanical properties of the roll and even causes the roll to be scrapped. The following technical solution is proposed:

[0032] Reference Figures 1 to 6 The temperature intermittent output electric heating furnace for roller heat treatment process in this embodiment includes a furnace body 1 and an electric heating assembly 7 installed inside the furnace body 1, an air cooling assembly 3 and a controller 6 are installed outside the furnace body 1, and a return air pipeline system associated with the controller 6 is arranged outside the furnace body 1, and the return air pipeline system includes a mixing cylinder 8, a return air pipeline 2, a ventilation pipeline 4 and a temperature sensor, and the return air pipeline 2 matches the setting position of the air cooling assembly 3;

[0033] The return air duct 2 is connected with the mixing cylinder 8 and the ventilation duct 4. The mixing cylinder 8 is installed on the furnace body 1. One end of the ventilation duct 4 is connected with the inside of the furnace body 1. A ventilation wheel 13 is rotatably installed inside the mixing cylinder 8. Two groups of inner ring plates 11 are installed on the ventilation wheel 13, and a movable blocking plate 14 is rotatably installed in the reversing wheel 13. The probe of the temperature sensor extends to the inside of the furnace body 1, and a temperature balance control unit is provided in the controller 6.

[0034] The electric heating assembly 7 is installed on both sides of the inner wall of the furnace body 1, and the electric heating assembly 7 is linearly equidistantly arranged along the length direction of the furnace body 1. The electric heating assemblies 7 on both sides of the inner wall of the furnace body 1 are staggered along the width direction of the furnace body 1. An electric push rod 5 is installed at the other end of the ventilation duct 4, and a ceramic air blocking block 12 is installed at the end of the output shaft of the electric push rod 5. The ceramic air blocking block 12 is arranged at one end of the ventilation duct 4.

[0035] Working principle: First of all, it should be explained that the heating method in the present invention is based on the resistance heating principle in the electric heating assembly 7, rather than the medium frequency heating principle, because the principle of medium frequency heating is based on the electromagnetic induction phenomenon, and the object is heated by generating an induced current (eddy current) in the conductor. It can be understood that the temperature is raised from the inside of the product. Although it has a highly efficient heating method, when the local temperature of the product is too high, it is difficult to quickly and slightly cool it down in a short time. Therefore, this embodiment mainly uses the resistance heating principle;

[0036] However, the difference from the conventional electric heating furnace structure is that the electric heating assembly 7 is installed in a staggered manner. Figure 2 For example, multiple electric heating assemblies 7 can be used to heat the entire area inside the furnace body 1 to ensure the uniformity of the roller heating process. Similar to the structure of a conventional electric heating furnace, the temperature sensor is still used to sense the ambient temperature inside the furnace body 1. When the temperature inside the furnace body 1 exceeds the preset value, it needs to be cooled in time. The cooling method introduced in this embodiment is roughly divided into: when the ambient temperature inside the furnace body 1 is too high, it is necessary to start each electric push rod 5 at the same time to separate the ceramic air blocking block 12 from one end of the ventilation duct 4. Because of the high pressure state generated in the high temperature environment, the high-temperature gas inside the furnace body 1 instantly enters the mixing cylinder 8 along the ventilation duct 4-return air duct 2, and the high-temperature gas passes through the air cooling assembly 3 when flowing in the return air duct 2, and can be naturally cooled or forcedly cooled to reduce the temperature inside the furnace body 1;

[0037] On the contrary, when the temperature of the furnace body 1 is lower than the preset value, it is necessary to increase the power output of the electric heating assembly 7 to increase the internal ambient temperature of the furnace body 1 .

[0038] Embodiment 2: This embodiment is to explain the temperature balance control unit in embodiment 1:

[0039] The temperature balance control unit is composed of a parameter integration module, an environmental analysis module and an interactive control module. The parameter integration module collects the ambient temperature inside the furnace body 1 and the output power of each electric heating assembly 7 through a temperature sensor, which are represented by Qt and Pt respectively, and sets the temperature preset values ​​Qmin and Qmax inside the furnace body 1 according to the heat treatment process requirements of the roller;

[0040] The environmental analysis module performs environmental temperature simulation analysis based on Qt, Qmin and Qmax. The environmental temperature simulation analysis process includes the following contents:

[0041] When Qt<Qmin or Qt=Qmin, it means that the interior of the furnace body 1 is in a state of loss of temperature;

[0042] When Qt>Qmax or Qt=Qmax, it indicates that the interior of the furnace body 1 is in an overheated state;

[0043] When Qmin<Qt<Qmax, it indicates that the interior of the furnace body 1 is in a normal state.

[0044] However, it is further explained that for the normal state of the furnace body 1, in order to ensure that the heat treatment process of the roll is in the best stable state, it is necessary to ensure that the ambient temperature Qt inside the furnace body 1 is in the middle value state between Qmin and Qmax. If Qmin and Qmax are 820°C and 880°C respectively, it means that when Qt is always equal to 850°C, it is the ambient temperature in the best stable state;

[0045] In actual situations, due to various unstable factors, the internal ambient temperature of the furnace body 1 is in a relatively fluctuating state. In the hypothermic state, a temperature compensation action is required, specifically, the output power Pt in the electric heating assembly 7 is increased to increase the internal temperature of the furnace body 1. Conversely, when it is in an overheated state, the furnace body 1 needs to be cooled down, specifically, part of the overheated gas is discharged through the return air duct 2, and the output power Pt in the electric heating assembly 7 can also be reduced;

[0046] More specifically, it is the calculation process of establishing the ambient temperature base in the ambient temperature simulation analysis: t Indicates the ambient temperature base, M t =(Qt-[Qmax·Qmin]) / [Qmax·Qmin], the explanation is: the ambient temperature base mainly represents the gradient relationship of the temperature value, and [Qmax·Qmin] mainly represents the variable value of Qmin and Qmax associated with the ambient temperature base calculation process. When in the hypothermic state, M t =(Qt-Qmin) / Qmin; when in overheating state, M t=(Qt-Qmax) / Qmax; and for the ambient temperature base in the undertemperature state and overheating state, it is necessary to restore the internal ambient temperature of the furnace body 1 to a normal state through a temperature compensation action or a temperature reduction action;

[0047] However, the key lies in the ambient temperature base under normal conditions. An intermediate temperature threshold is added based on Qmin and Qmax: A = (Qmin + Qmax) / 2 + 10.5°C, where (Qmin + Qmax) / 2 is the average of Qmin and Qmax, and 10.5°C is the compensation value of the intermediate threshold. Therefore, the following actions are set in the interactive control module by combining the ambient temperature base and the intermediate temperature threshold:

[0048] 1) Temperature compensation action and temperature reduction action, by increasing the output power of the electric heating assembly 7, reducing the output power of the electric heating assembly 7 and exhausting the gas, or one or more of the three actions, so that the internal ambient temperature of the furnace body 1 is restored to the intermediate temperature threshold;

[0049] 2) In the normal state, when Qmin<Qt<(Qmin+Qmax) / 2, it is necessary to temporarily increase the output power of the electric heating assembly 7 until the internal temperature of the furnace body 1 returns to A;

[0050] 3) Similarly, in the normal state, when A<Qt<Qmax, it is necessary to temporarily reduce the output power of the electric heating assembly 7 without activating the exhaust action until the internal temperature of the furnace body 1 returns to A.

[0051] In combination with the above content, it is explained that the overall process mainly depends on the adjustment of the output power in the electric heating assembly 7, including two processes of increasing power and reducing power, and both processes are based on the ambient temperature base.

[0052] Embodiment 3: This embodiment is based on the technology of embodiment 2 and supplements the embodiment 1:

[0053] A motor assembly 9 is installed on the furnace body 1, and the output shaft of the motor assembly 9 is connected to the center point of the reversing wheel 13. An exhaust pipe 10 is installed on the lower curved surface of the mixing cylinder 8. The outer curved surface of the inner ring sheet 11 matches the inner wall of the mixing cylinder 8. A sinking block 15 is installed at the lower end of the movable blocking piece 14. The rotation point between the movable blocking piece 14 and the reversing wheel 13 is set as the second rotation point, and the rotation point between the reversing wheel 13 and the mixing cylinder 8 is set as the first rotation point. The setting position height of the second rotation point is lower than the setting position height of the first rotation point. The distance between the end position of the movable blocking piece 14 away from the sinking block 15 and the second rotation point is greater than the distance between the sinking block 15 and the second rotation point. The width of the movable blocking piece 14 is smaller than the inner diameter of the inner ring sheet 11.

[0054] Solution Description: Refer to Figure 4 and Figure 5 When the furnace body 1 is not exhausting, the high-temperature gas inside the furnace body 1 will not flow out due to the ceramic gas blocking block 12 blocking the ventilation pipe 4, and the inner ring sheet 11 inside the mixing cylinder 8 is as Figure 5 In the initial state shown in FIG, when the exhaust action is enabled, the high-temperature gas is rapidly blown into the mixing cylinder 8 due to the high-pressure environment, and the movable plug 14 "divides" the inside of the mixing cylinder 8 into two due to the action of the falling block 14, so that in the process of two hot air flows blowing in at the same time, the movable plug 14 can play the role of separating the two hot air flows;

[0055] However, it is important to note that the heat treatment process of the roller requires the auxiliary protection of the inert gas, so in the initial state, the inside of the gas mixing cylinder 8 will also be filled with inert gas, and because of the blocking of the inner ring sheet 11, the inert gas inside it will not be discharged from the exhaust pipe 10, and the superheated gas will also be mixed with the inert gas at room temperature inside the gas mixing cylinder 8 for heat exchange after being cooled by the air cooling assembly 3. It can be understood that the temperature inside the furnace body 1 is "replaced" to reduce the temperature inside the furnace body 1;

[0056] It should also be noted that during the heat treatment process, due to oxidation reactions, physical changes and other phenomena, there may be fly ash in the tail gas generated. As the exhaust action continues, the fly ash accumulates inside the mixing cylinder 8. Figure 6 When the inner ring piece 11 and the reversing wheel 13 rotate 90° counterclockwise, the inner ring piece 11 completely blocks the intersection of the return air duct 2 and the mixing cylinder 8 and completely "opens" the intersection of the exhaust duct 10 and the mixing cylinder 8, so that the fly ash is discharged from the exhaust duct 8, but the movable plug 14 will also rotate 90° synchronously with the reversing wheel 13. However, due to the structural characteristics of the movable plug 14, its second rotation point is lower than the first rotation point, and its length is also smaller than the diameter of the inner ring piece 11, so that the movement of the movable plug 14 is limited. When the movable plug 14 is away from the lower After one end of the sinker 15 is in complete contact with the inner ring piece 11, it will not move again, so that the interior of the inner ring piece 11 can be divided into spaces of different volumes. Then the reversing wheel 13 rotates 180° in the opposite direction, and the interior of the inner ring piece 11 is again divided into spaces of different volumes by the movable blocking piece 14. The purpose is to achieve the double discharge of fly ash and avoid the fly ash being "backblown" into the return air duct 2 and causing blockage of the return air duct 2. Finally, after a single discharge of fly ash, the inner ring piece 11 is reset to re-seal the exhaust duct 10, and the inert gas is re-supplied to the mixing cylinder 8.

[0057] To sum up: based on the conventional electric heating furnace structure, the electric heating assembly is used as the only heat source, and the setting position of the electric heating assembly is further restricted to change the heating area. The key is to set a temperature balance control unit to achieve small gradient temperature control, which is specifically manifested in the mixed flow process of hot air based on the temperature sensor. The superheated gas is blown out from the inside of the furnace for natural cooling or forced air cooling to avoid the problem of heat loss of the roller under overheating state. Similarly, the temperature-loss gas is supplemented, and on this basis, a special mixing cylinder is added for the mixed flow process of the hot air flow, and the rotation process is used to change the relative position of the second rotation point in the active plug. Its essence is to change the setting position of the active plug relative to the inner ring, which is used to temporarily accelerate the "sedimentation" of impurities such as fly ash in the heat treatment exhaust gas.

[0058] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A temperature intermittent output electric heating furnace for roller heat treatment process, comprising a furnace body (1) and an electric heating assembly (7) installed inside the furnace body (1), characterized in that: An air cooling assembly (3) and a controller (6) are installed outside the furnace body (1), and an air return pipeline system associated with the controller (6) is arranged outside the furnace body (1), the air return pipeline system comprises an air mixing cylinder (8), an air return pipeline (2), an air exchange pipeline (4) and a temperature sensor, and the air return pipeline (2) matches the setting position of the air cooling assembly (3); The return air duct (2) is connected to the mixing cylinder (8) and the ventilation duct (4); the mixing cylinder (8) is mounted on the furnace body (1); one end of the ventilation duct (4) is connected to the interior of the furnace body (1); a ventilation wheel (13) is rotatably mounted inside the mixing cylinder (8); two groups of inner ring plates (11) are mounted on the ventilation wheel (13); and a movable blocking plate (14) is rotatably mounted in the reversing wheel (13); a probe of the temperature sensor extends into the interior of the furnace body (1); and a temperature balance control unit is provided in the controller (6).

2. The temperature intermittent output electric heating furnace for roller heat treatment process according to claim 1 is characterized in that: The electric heating assemblies (7) are installed at positions on both sides of the inner wall of the furnace body (1), and the electric heating assemblies (7) are arranged linearly and equidistantly along the length direction of the furnace body (1), and the electric heating assemblies (7) at positions on both sides of the inner wall of the furnace body (1) are arranged in a staggered manner along the width direction of the furnace body (1).

3. The temperature intermittent output electric heating furnace for roller heat treatment process according to claim 1, characterized in that: An electric push rod (5) is installed at the other end of the ventilation duct (4), and a ceramic air blocking block (12) is installed at the end of the output shaft of the electric push rod (5). The ceramic air blocking block (12) is arranged at one end of the ventilation duct (4).

4. The temperature intermittent output electric heating furnace for roller heat treatment process according to claim 1, characterized in that: A motor assembly (9) is installed on the furnace body (1), the output shaft of the motor assembly (9) is connected to the center point of the reversing wheel (13), and an exhaust pipe (10) is installed on the lower curved surface of the mixing cylinder (8).

5. The temperature intermittent output electric heating furnace for roller heat treatment process according to claim 1, characterized in that: The outer curved surface of the inner ring plate (11) matches the inner wall of the mixing cylinder (8), and a sinking block (15) is installed at the lower end of the movable blocking plate (14).

6. The temperature intermittent output electric heating furnace for roller heat treatment process according to claim 5, characterized in that: The rotation point between the movable blocking piece (14) and the reversing wheel (13) is set as the second rotation point, the rotation point between the reversing wheel (13) and the mixing cylinder (8) is set as the first rotation point, and the setting position height of the second rotation point is lower than the setting position height of the first rotation point.

7. The temperature intermittent output electric heating furnace for roller heat treatment process according to claim 6, characterized in that: The distance between one end of the movable blocking piece (14) away from the sinking block (15) and the second rotation point is greater than the distance between the sinking block (15) and the second rotation point, and the width of the movable blocking piece (14) is smaller than the inner diameter of the inner ring piece (11).

8. The temperature intermittent output electric heating furnace for roller heat treatment process according to any one of claims 1 to 7, characterized in that: The temperature balance control unit is composed of a parameter integration module, an environmental analysis module and an interactive control module. The parameter integration module collects the ambient temperature inside the furnace body (1) and the output power of each electric heating assembly (7) through a temperature sensor, which are represented by Qt and Pt respectively, and sets the temperature preset values ​​Qmin and Qmax inside the furnace body (1) according to the heat treatment process requirements of the rolling roller; The environmental analysis module performs environmental temperature simulation analysis based on Qt, Qmin and Qmax. The environmental temperature simulation analysis process includes the following contents: When Qt<Qmin or Qt=Qmin, it indicates that the interior of the furnace body (1) is in a state of loss of temperature; When Qt>Qmax or Qt=Qmax, it indicates that the interior of the furnace body (1) is in an overheated state; When Qmin<Qt<Qmax, it indicates that the interior of the furnace body (1) is in a normal state; In the interactive control module, the calculation process of the ambient temperature base is established in the ambient temperature simulation analysis, with M t Indicates the ambient temperature base, M t =(Qt-[Qmax·Qmin]) / [Qmax·Qmin], and an intermediate temperature threshold is added based on Qmin and Qmax: A=(Qmin+Qmax) / 2+10.5℃, and it is associated with the hypothermia state, overheating state, and normal state to perform heating actions, cooling actions, and exhaust actions.

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