Heat treatment furnace heating device and heat treatment furnace

Abstract

The utility model discloses a heat treatment furnace heating device and a heat treatment furnace, and belongs to the field of heat treatment equipment. The heat treatment furnace heating device comprises a plurality of heating units, a plurality of temperature control assemblies, a plurality of adjusting assemblies and a heating power source, and materials in a heat treatment furnace are heated in a partitioned mode through the multiple heating units. The heating processes of the multiple heating units are independently monitored and adjusted through the multiple temperature control assemblies and the multiple adjusting assemblies correspondingly, so that the temperatures of the multiple heating subareas in the heat treatment furnace are independently controlled, and the phenomenon that the temperature areas in the heat treatment furnace are not uniform due to uneven heat radiation or uneven heat convection in the heat treatment furnace is avoided; and the temperature uniformity in the heat treatment furnace can be improved. In addition, the safety and the stability of the heating device of the heat treatment furnace can be improved through a transformer in the adjusting assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat treatment equipment field especially relates to a metallographic sample's clamping device and grinding equipment. BACKGROUND

[0002] A heat treatment furnace is a device for heating, holding and cooling metal materials to improve material properties or transform specific organizational structures. Heat treatment furnaces can include vacuum sintering furnaces, muffle furnaces, etc. Among them, the vacuum sintering furnace refers to a heat treatment furnace that protects the sintering of heated objects in a vacuum environment. For example, a vacuum sintering furnace can be used for sintering processes of metal powder pressed bodies.

[0003] A heat treatment furnace typically includes a furnace body and a heating unit installed on the furnace body. The chamber of the furnace body can be used to place the material to be heated, and the heating unit is used to heat the material in the chamber of the furnace body.

[0004] Currently, when using a heat treatment furnace to heat materials, the heat uniformity in the chamber of the heat treatment furnace is poor, resulting in a large temperature difference between different parts of the material to be heated, which leads to poor quality of the products formed. SUMMARY

[0005] The utility model embodiment provides a kind of heat treatment furnace heating device and heat treatment furnace, and the technical solution is as follows:

[0006] According to an aspect of the present application, a heat treatment furnace heating device is provided for a heat treatment furnace, comprising: a plurality of heating units, a plurality of temperature control components, a plurality of adjustment components and a heating power supply;

[0007] The heat treatment furnace has a plurality of heating zones, and the plurality of heating units are located one-to-one in the plurality of heating zones.

[0008] The temperature control component includes a temperature detection unit and a temperature regulator, and a plurality of temperature detection units are located one-to-one in the plurality of heating zones and are used to detect the temperature of the corresponding heating zone. A plurality of temperature regulators are electrically connected one-to-one with a plurality of temperature detection units.

[0009] The adjustment component includes a power regulator and a transformer, and a plurality of power regulators are electrically connected one-to-one with a plurality of temperature regulators, and a plurality of power regulators are electrically connected one-to-one with the plurality of heating units through a plurality of transformers. The power regulator and the transformer are electrically connected with the heating power supply.

[0010] Optionally, the plurality of heating zones include a first heating zone, a second heating zone and a third heating zone.

[0011] The first heating sub-zone and the second heating sub-zone are arranged along a horizontal direction, and the third heating sub-zone is located at the bottom of the first heating sub-zone and the second heating sub-zone.

[0012] Optionally, the heat treatment furnace heating device further comprises a programmable logic controller; the plurality of temperature adjusting instruments comprises a master temperature adjusting instrument, a first slave temperature adjusting instrument and a second slave temperature adjusting instrument; and the plurality of temperature detecting units comprises a first thermocouple, a second thermocouple and a third thermocouple.

[0013] The programmable logic controller is electrically connected with the master temperature adjusting instrument, and the first slave temperature adjusting instrument and the second slave temperature adjusting instrument are both electrically connected with the master temperature adjusting instrument.

[0014] The master temperature adjusting instrument is electrically connected with the first thermocouple, and the first thermocouple is used for detecting the temperature of the first heating sub-zone.

[0015] The first slave temperature adjusting instrument is electrically connected with the second thermocouple, and the second thermocouple is used for detecting the temperature of the second heating sub-zone.

[0016] The second slave temperature adjusting instrument is electrically connected with the third thermocouple, and the third thermocouple is used for detecting the temperature of the third heating sub-zone.

[0017] Optionally, the heat treatment furnace heating device further comprises a plurality of voltage detecting units and a plurality of current detecting units, the plurality of voltage detecting units correspond to the plurality of heating units one by one, and the plurality of current detecting units correspond to the plurality of heating units one by one.

[0018] Two ends of the voltage detecting unit are respectively electrically connected with two ends of the corresponding heating unit.

[0019] The current detecting unit is respectively electrically connected with the corresponding heating unit and the transformer.

[0020] Optionally, the adjustment assembly further comprises a primary side circuit breaker.

[0021] One end of the primary side circuit breaker is electrically connected with the heating power supply, and the other end of the primary side circuit breaker is electrically connected with the power adjuster and the transformer.

[0022] Optionally, the adjustment assembly further comprises a contactor.

[0023] One end of the contactor is electrically connected with the primary side circuit breaker, and the other end of the contactor is electrically connected with the transformer.

[0024] Optionally, the adjustment assembly further comprises a ground leakage current detecting unit.

[0025] The ground leakage current detection unit has a detection end, a ground end and a control end, the detection end of the ground leakage current detection unit is electrically connected with the neutral point of the transformer, the ground end of the ground leakage current detection unit is grounded, and the control end of the ground leakage current detection unit is electrically connected with the programmable logic controller.

[0026] Optionally, the ground leakage current detection unit comprises a current sensor, a comparator, a grounding switch and an auxiliary switch.

[0027] The current sensor is electrically connected with the neutral point of the transformer.

[0028] One end of the comparator is electrically connected with the current sensor, and the other end of the comparator is electrically connected with the grounding switch and the auxiliary switch.

[0029] The grounding switch is grounded, and the auxiliary switch is electrically connected with the programmable logic controller.

[0030] Optionally, the adjusting assembly further comprises a temperature control switch.

[0031] The temperature control switch is attached to the transformer, and the temperature control switch is electrically connected with the programmable logic controller.

[0032] According to another aspect of the present application, a heat treatment furnace is provided, which comprises a furnace body and a heat treatment furnace heating device, the heat treatment furnace heating device is used for heating the inner cavity of the furnace body, and the heat treatment furnace heating device comprises the heat treatment furnace heating device described above.

[0033] The technical scheme provided by the present application has at least the following beneficial effects:

[0034] The heat treatment furnace heating device comprises a plurality of heating units, a plurality of temperature control assemblies, a plurality of adjusting assemblies and a heating power supply, the material in the heat treatment furnace is heated in a partitioned manner by the plurality of heating units, and the heating process of the plurality of heating units is independently monitored and adjusted by the plurality of temperature control assemblies and the plurality of adjusting assemblies, so that the temperature of the plurality of heating partitions in the heat treatment furnace is independently controlled, the phenomenon of uneven temperature distribution in the heat treatment furnace caused by uneven heat radiation or uneven heat convection is avoided, and the temperature uniformity in the heat treatment furnace is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0036] Figure 1 is a structural schematic diagram of a heat treatment furnace provided by the embodiment of the present application;

[0037] Figure 2 is a connection structure schematic diagram of a heating device of a heat treatment furnace provided by the embodiment of the present application;

[0038] Figure 3 is a connection structure schematic diagram of an adjusting assembly provided by the embodiment of the present application;

[0039] Figure 4 is a connection structure schematic diagram of multiple temperature control assemblies provided by the embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the embodiments of the present application in combination with the drawings.

[0041] Although the present application can be easily embodied as different forms of embodiments, only some specific embodiments are shown in the drawings and will be described in detail in the present specification, and it can be understood that the present specification should be regarded as a demonstrative description of the principles of the present application, and is not intended to limit the present application to that described herein.

[0042] Therefore, one feature indicated in the present specification will be used to explain one feature of one embodiment of the present application, and is not intended to imply that each embodiment of the present application must have the explained feature. In addition, it should be noted that the present specification describes many features. Although some features can be combined together to show possible system designs, these features can also be used in other combinations which are not explicitly described. Therefore, unless otherwise specified, the described combinations are not intended to be limiting.

[0043] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) are used to explain the structure and movement of various elements of the present application, which are not absolute but relative. When these elements are in the positions shown in the drawings, these descriptions are appropriate. If the positions of these elements change, the indications of directions will also change accordingly.

[0044] Reference is made to Figure 1 andFigure 2 , Figure 1 is a structural schematic view of a heat treatment furnace 20 provided by an embodiment of the present application, Figure 2 is a connection structure schematic view of a heat treatment furnace heating device provided by an embodiment of the present application, Figure 3 is a connection structure schematic view of an adjusting assembly 13 provided by an embodiment of the present application, Figure 3 It is shown that a connection structure schematic view of an adjusting assembly 13 and a corresponding heating unit 11, and the heat treatment furnace heating device can be used for the heat treatment furnace 20, and the heat treatment furnace heating device can include: a plurality of heating units 11, a plurality of temperature control assemblies 12, a plurality of adjusting assemblies 13 and a heating power supply 14.

[0045] The plurality of heating units 11 can correspond to the plurality of temperature control units one by one, the plurality of heating units 11 can also correspond to the plurality of adjusting assemblies 13 one by one, and the plurality of temperature control units can also correspond to the plurality of adjusting assemblies 13 one by one. The heating power supply 14 can be electrically connected to the plurality of heating units 11 one by one through the plurality of adjusting assemblies 13, and each adjusting assembly 13 can be used to adjust the heating power of the corresponding heating unit 11. Each temperature control unit can be used to detect the heating temperature of the corresponding heating unit 11 in real time, and output a control signal to the corresponding power adjuster 131 according to the detected temperature, so as to adjust the power of the heating unit 11. For example, the heat treatment furnace heating device can include three heating units 11, three temperature control assemblies 12 and three adjusting assemblies 13.

[0046] The heat treatment furnace 20 can have a plurality of heating partitions 21, and the plurality of heating units 11 are located in the plurality of heating partitions 21 one by one. Since the heat treatment furnace 20 can be used to heat a plurality of different materials, for different types of materials, the shape of the material can be different, and the atmosphere inside the heat treatment furnace 20 can also be different, so that the temperature at different positions in the heat treatment furnace 20 can be different. Therefore, in the embodiment of the present application, the plurality of heating units 11 independently heat the plurality of partitions to provide different heat to different heating partitions 21 according to the requirements, which can improve the uniformity of the temperature in the chamber of the heat treatment furnace 20.

[0047] Each temperature control component 12 can include a temperature detection unit 121 and a temperature regulator 122. The plurality of temperature detection units 121 are one-to-one correspondingly located in the plurality of heating sub-zones 21 and are used to detect the temperature of the corresponding heating sub-zone 21. The plurality of temperature regulators 122 are one-to-one correspondingly electrically connected with the plurality of temperature detection units 121. The temperature regulator 122 can have a PID (English: Proportion Integral Differential) regulation function, which is a regulation method capable of controlling in proportion to the proportion (P), integral (I) and differential (D) of the deviation in process control. The temperature detection unit 121 sends a temperature signal to the temperature regulator 122, and the temperature regulator 122 can monitor the measured value and automatically set the PID parameter to adjust and control the temperature of the heating unit 11. For example, the temperature detection unit 121 can send the detected temperature signal to the temperature regulator 122, and the temperature regulator 122 can perform PID operation according to the temperature value set by the pre-stored process program, and then send the operation result to the adjustment component 13 to adjust the power of the heating unit 11 through the adjustment component 13.

[0048] Each adjustment component 13 can include a power adjuster 131 and a transformer 132. The plurality of power adjusters 131 are one-to-one correspondingly electrically connected with the plurality of temperature regulators 122, and the plurality of power adjusters 131 are one-to-one correspondingly electrically connected with the plurality of heating units 11 through the plurality of transformers 132. The power adjuster 131 and the transformer 132 are electrically connected with the heating power supply 14. The power supply circuit can be electrically connected with the primary side of the power adjuster 131 and the transformer 132. The secondary side of the transformer 132 can be electrically connected with the heating unit 11. For example, the primary side voltage of the transformer 132 can be 220V or 380V, and the secondary side voltage of the transformer 132 can be 58V. In this way, the heating unit 11 can be driven by a smaller voltage and a larger current for heating, which can improve the safety of the heating device of the heat treatment furnace. Moreover, by arranging the power adjuster 131 on the primary side of the transformer 132, the voltage regulation range of the power adjuster 131 can be larger, and the accuracy and stability of the power adjustment can be improved.

[0049] For example, the input signal of the temperature regulator 122 can be the temperature measurement value of the temperature detection unit 121 and the preset set temperature inside the heat treatment furnace 20. The output signal of the temperature regulator 122 can be a trigger signal that can trigger the power adjuster 131. For example, the trigger signal can be a current signal of 4mA-20mA.

[0050] Therefore, the material in the heat treatment furnace 20 is heated in multiple heating zones by the multiple heating units 11, and the heating process of the multiple heating units 11 is monitored and adjusted independently by the multiple temperature control components 12 and the multiple adjustment components 13 respectively, so that the temperature of the multiple heating zones 21 in the heat treatment furnace 20 is controlled independently, and the phenomenon of uneven temperature zones in the heat treatment furnace 20 caused by uneven heat radiation or uneven heat convection in the heat treatment furnace 20 is avoided, and the temperature uniformity in the heat treatment furnace 20 is improved.

[0051] In addition, each temperature control component 12 can include a temperature detection unit 121 and a temperature adjusting instrument 122, and the temperature of each heating zone 21 is fed back to the temperature adjusting instrument 122 in real time by the temperature detection unit 121, so that precise temperature control can be achieved, and the production efficiency and product yield of the heat treatment furnace 20 are improved.

[0052] In summary, the heat treatment furnace heating device provided by the embodiment of the present application includes multiple heating units 11, multiple temperature control components 12, multiple adjustment components 13 and a heating power supply 14, the material in the heat treatment furnace 20 is heated in multiple heating zones by the multiple heating units 11, and the heating process of the multiple heating units 11 is monitored and adjusted independently by the multiple temperature control components 12 and the multiple adjustment components 13 respectively, so that the temperature of the multiple heating zones 21 in the heat treatment furnace 20 is controlled independently, and the phenomenon of uneven temperature zones in the heat treatment furnace 20 caused by uneven heat radiation or uneven heat convection in the heat treatment furnace 20 is avoided, and the temperature uniformity in the heat treatment furnace 20 is improved. The problem that the heat uniformity in the cavity of the heat treatment furnace in the related art is poor, the temperature difference between different parts of the material to be heated is large, and the quality of the formed product is poor can be solved. In addition, the transformer in the adjustment component can also improve the safety and stability of the heat treatment furnace heating device.

[0053] Please refer to Figure 1 In an optional embodiment, the multiple heating zones 21 can include a first heating zone 211, a second heating zone 212 and a third heating zone 213. The first heating zone 211 and the second heating zone 212 are arranged in a horizontal direction, and the third heating zone 213 is located at the bottom of the first heating zone 211 and the second heating zone 212. Such zoning can improve the temperature uniformity inside the heat treatment furnace 20.

[0054] Please refer to Figure 1 , Figure 2 and Figure 4 , Figure 4Is the connecting structure schematic view of multiple temperature control components 12 provided by the embodiment of the utility model, in an alternative embodiment, the heat treatment furnace heating device can also include: programmable logic controller 15 (English: Programmable Logic Controller;Abbreviation: PLC);Multiple temperature regulating instruments 122 include: main temperature regulating instrument 1221, first slave temperature regulating instrument 1222 and second slave temperature regulating instrument 1223;Multiple temperature detection units 121 include: first thermocouple 1211, second thermocouple 1212 and third thermocouple 1213.

[0055] Programmable logic controller 15 is electrically connected with main temperature regulating instrument 1221, and first slave temperature regulating instrument 1222 and second slave temperature regulating instrument 1223 are electrically connected with main temperature regulating instrument 1221;Main temperature regulating instrument 1221 is electrically connected with first thermocouple 1211, and first thermocouple 1211 is used to detect the temperature of first heating partition 211;First slave temperature regulating instrument 1222 is electrically connected with second thermocouple 1212, and second thermocouple 1212 is used to detect the temperature of second heating partition 212;Second slave temperature regulating instrument 1223 is electrically connected with third thermocouple 1213, and third thermocouple 1213 is used to detect the temperature of third heating partition 213.

[0056] PLC can have an operation interface for human-computer interaction, and operating personnel can issue the operation instruction of heat treatment furnace 20 through the operation interface and transmit to main temperature regulating instrument 1221 through PLC, and the operation instruction can include: stop, pause, run and skip section etc.

[0057] The process program of heat treatment furnace 20 can be pre-stored in main temperature regulating instrument 1221, so as to control the stable output of corresponding heating unit 11 through main temperature regulating instrument 1221, and first slave temperature regulating instrument 1222 and second slave temperature regulating instrument 1223 can follow main temperature regulating instrument 1221 to control the stable output of corresponding heating unit 11, compared with the complete independent control of the temperature of multiple heating partitions 21, the master-slave coordination control in the embodiment of the utility model can improve the coordination and uniformity of multiple heating partitions 21, and also can simplify the structure of temperature control component 12.

[0058] Please refer to Figure 3In an alternative embodiment, the heat treatment furnace heating device can further comprise: a plurality of voltage detection units 16 and a plurality of current detection units 17, the plurality of voltage detection units 16 corresponding to the plurality of heating units 11 one by one, and the plurality of current detection units 17 corresponding to the plurality of heating units 11 one by one; the two ends of the voltage detection unit 16 are respectively electrically connected to the two ends of the corresponding heating unit 11; the current detection unit 17 is respectively electrically connected to the corresponding heating unit 11 and the transformer 132. The plurality of voltage detection units 16 and the plurality of current detection units 17 can be used to realize the visualization of the heating voltage and the heating current, so as to facilitate the operator to monitor the current process in real time.

[0059] Please refer to Figure 3 In an exemplary embodiment, the adjustment assembly 13 can further comprise: a primary side circuit breaker 133; one end of the primary side circuit breaker 133 is electrically connected to the heating power supply 14, and the other end of the primary side circuit breaker 133 is electrically connected to the power regulator 131 and the transformer 132. By arranging the primary side circuit breaker 133, the power regulator 131 and the transformer 132 in the adjustment assembly 13 can be protected. For example, when the transformer 132 or the primary side circuit has a short circuit fault, the primary side circuit breaker 133 can quickly cut off the heating power supply 14 to prevent the short circuit current from damaging the transformer 132 or causing more serious power system accidents. Alternatively, when the operator overhauls or maintains the transformer 132, the primary side circuit breaker 133 can disconnect the primary side power supply to ensure that the equipment is completely isolated from the power grid and to ensure the safety of the operator.

[0060] In an alternative embodiment, the adjustment assembly 13 can further comprise: a contactor 134; one end of the contactor 134 is electrically connected to the primary side circuit breaker 133, and the other end of the contactor 134 is electrically connected to the transformer 132, and the contactor 134 can also be electrically connected to the programmable logic controller 15. The contactor 134 can be used to flexibly control the on-off of the transformer 132. For example, the contactor 134 can be remotely operated by the PLC to realize the opening or closing of the transformer 132.

[0061] In an alternative embodiment, the adjusting assembly 13 can further comprise a ground leakage current detection unit 135. The ground leakage current detection unit 135 has a detection end, a ground end and a control end. The detection end of the ground leakage current detection unit 135 is electrically connected to the neutral point of the transformer 132. The ground end of the ground leakage current detection unit 135 is grounded. The control end of the ground leakage current detection unit 135 is electrically connected to the programmable logic controller 15. Since the heating unit 11 can have a discharge during the heating process, resulting in a leakage current in the circuit of the transformer 132 and the heating unit 11, the ground leakage current detection unit 135 can monitor the leakage current in real time and set a reasonable leakage current threshold. When the leakage current is small, the leakage current is allowed to leak to the ground. When the leakage current exceeds the preset leakage current threshold, an alarm signal is sent to the programmable logic controller 15, and the circuit can be cut off if necessary. For example, the ground leakage current detection unit 135 can comprise an air switch with an auxiliary contact.

[0062] In an alternative embodiment, the ground leakage current detection unit 135 comprises a current sensor, a comparator (not shown in the figure), a grounding switch 1351 and an auxiliary switch 1352. The current sensor is electrically connected to the neutral point of the transformer 132. One end of the comparator is electrically connected to the current sensor, and the other end of the comparator is electrically connected to the grounding switch 1351 and the auxiliary switch 1352. The grounding switch 1351 is grounded, and the auxiliary switch 1352 is electrically connected to the programmable logic controller 15. The current sensor can be used to detect the size of the leakage current. The positive input end of the comparator is electrically connected to the output end of the current sensor, and the negative input end is connected to a preset leakage current threshold or reference voltage. When the leakage current monitored by the leakage current sensor is lower than the leakage current threshold, the sampling signal voltage will be lower than the reference voltage, and the comparator can output a low-level signal. At this time, the grounding switch 1351 can be closed. Conversely, when the leakage current monitored by the current sensor exceeds the leakage current threshold, the sampling signal voltage will be higher than the reference voltage, and the comparator can output a high-level signal. At this time, the auxiliary switch 1352 can be closed. That is, the grounding switch 1351 and the auxiliary switch 1352 can receive the output signal from the comparator and adjust the opening or closing state according to the high or low level of the signal.

[0063] Please refer to Figure 3 In an alternative embodiment, the adjusting assembly 13 can further comprise a temperature control switch 136. The temperature control switch 136 is attached to the transformer 132, and the temperature control switch 136 is electrically connected to the programmable logic controller 15. The temperature control switch 136 can detect the temperature of the transformer 132 in real time, and send an alarm signal to the programmable logic controller 15 when the temperature of the transformer 132 is greater than a preset temperature threshold.

[0064] The utility model embodiment further provides a kind of heat treatment furnace, the heat treatment furnace can include: furnace body and heat treatment furnace heating device, heat treatment furnace heating device is used to heat the inner cavity of furnace body, heat treatment furnace heating device includes the heat treatment furnace heating device in any of the above embodiments.

[0065] In the utility model, the terms "first", "second", "third" and "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. The term "multiple" refers to two or more than two, unless otherwise explicitly limited.

[0066] In several embodiments provided by the utility model, it should be understood that the disclosed device can be implemented by other ways. For example, the device embodiments described above are only illustrative, for example, the division of the unit is only a logical function division, and actual implementation can have another division mode, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed can be through some interface, indirect coupling or communication connection between device or unit, which can be electrical, mechanical or other forms.

[0067] The above is only optional embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A heat treatment furnace heating device characterized by comprising: The application discloses a heating device for a heat treatment furnace, which comprises a plurality of heating units, a plurality of temperature control components, a plurality of adjustment components and a heating power supply. The heat treatment furnace has a plurality of heating sub-zones, and the plurality of heating units are arranged in the plurality of heating sub-zones in one-to-one correspondence. The temperature control component comprises a temperature detection unit and a temperature regulator, the plurality of temperature detection units are arranged in the plurality of heating sub-zones in one-to-one correspondence and are used for detecting the temperature of the corresponding heating sub-zone, and the plurality of temperature regulators are electrically connected with the plurality of temperature detection units in one-to-one correspondence. The adjustment component comprises a power regulator and a transformer, the plurality of power regulators are electrically connected with the plurality of temperature regulators in one-to-one correspondence, and the plurality of power regulators are electrically connected with the plurality of heating units through the plurality of transformers in one-to-one correspondence, and the power regulator and the transformer are electrically connected with the heating power supply.

2. The heat-treatment furnace heating device according to claim 1, characterized by The plurality of heating sub-zones comprise a first heating sub-zone, a second heating sub-zone and a third heating sub-zone. The first heating sub-zone and the second heating sub-zone are arranged along the horizontal direction, and the third heating sub-zone is arranged at the bottom of the first heating sub-zone and the second heating sub-zone.

3. The heat-treatment furnace heating device according to claim 2, characterized by The heating device of the heat treatment furnace further comprises a programmable logic controller, the plurality of temperature regulators comprise a master temperature regulator, a first slave temperature regulator and a second slave temperature regulator, and the plurality of temperature detection units comprise a first thermocouple, a second thermocouple and a third thermocouple. The programmable logic controller is electrically connected with the master temperature regulator, and the first slave temperature regulator and the second slave temperature regulator are electrically connected with the master temperature regulator. The master temperature regulator is electrically connected with the first thermocouple, and the first thermocouple is used for detecting the temperature of the first heating sub-zone. The first slave temperature regulator is electrically connected with the second thermocouple, and the second thermocouple is used for detecting the temperature of the second heating sub-zone. The second slave temperature regulator is electrically connected with the third thermocouple, and the third thermocouple is used for detecting the temperature of the third heating sub-zone.

4. The heat-treatment furnace heating device according to claim 1, characterized by The heating device of the heat treatment furnace further comprises a plurality of voltage detection units and a plurality of current detection units, the plurality of voltage detection units are in one-to-one correspondence with the plurality of heating units, and the plurality of current detection units are in one-to-one correspondence with the plurality of heating units. Two ends of the voltage detection unit are electrically connected with two ends of the corresponding heating unit. The current detection unit is electrically connected with the corresponding heating unit and the transformer.

5. The heat-treatment furnace heating device according to claim 3, characterized by The adjustment component further comprises a primary side circuit breaker. One end of the primary side circuit breaker is electrically connected with the heating power supply, and the other end of the primary side circuit breaker is electrically connected with the power regulator and the transformer.

6. The heat-treatment furnace heating device according to claim 5, characterized in that, The adjustment component further comprises a contactor. One end of the contactor is electrically connected with the primary side circuit breaker, the other end of the contactor is electrically connected with the transformer, and the contactor is further electrically connected with the programmable logic controller.

7. The heat-treatment furnace heating device according to claim 3, characterized by The adjustment component further comprises a ground leakage current detection unit. The ground leakage current detection unit has a detection end, a ground end and a control end, the detection end of the ground leakage current detection unit is electrically connected with the neutral point of the transformer, the ground end of the ground leakage current detection unit is grounded, and the control end of the ground leakage current detection unit is electrically connected with the programmable logic controller.

8. The heat-treatment furnace heating device according to claim 7, characterized in that, The ground leakage current detection unit comprises a current sensor, a comparator, a grounding switch and an auxiliary switch. The current sensor is electrically connected with the neutral point of the transformer. One end of the comparator is electrically connected with the current sensor, and the other end of the comparator is electrically connected with the grounding switch and the auxiliary switch. The grounding switch is grounded, and the auxiliary switch is electrically connected with the programmable logic controller.

9. The heat-treatment furnace heating device according to claim 3, characterized by The adjusting assembly further comprises a temperature control switch. The temperature control switch is attached to the transformer, and the temperature control switch is electrically connected with the programmable logic controller.

10. A heat treatment furnace characterized by comprising: Comprise: A furnace body and a heat treatment furnace heating device for heating the inner cavity of the furnace body, the heat treatment furnace heating device comprising the heat treatment furnace heating device of any one of claims 1 to 9.

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