Industrial furnace with controllable cooling speed and application thereof

Abstract

The invention belongs to the technical field of industrial heat treatment equipment, and particularly discloses an industrial furnace capable of controlling the cooling speed and application thereof.The industrial furnace comprises a furnace body, a master control system and a heating, cooling and uniform temperature regulation and control mechanism, and the master control system is electrically connected with the heating, cooling and uniform temperature regulation and control mechanism; materials in the furnace body are cooled according to a preset cooling speed through cooperative control; wherein the furnace body comprises a furnace shell, a hearth and a furnace door located on one side of the furnace shell and used for sealing the hearth, temperature sensors are evenly arranged in the hearth, and the temperature sensors are connected with the master control system through temperature compensation wires. And the temperature is supplemented by controlling the heating mechanism or the cooling mechanism. The industrial furnace provided by the invention can be cooled according to the preset cooling speed, is mainly used for metal materials with special cooling requirements on the heat treatment process, and is beneficial to providing material support for the high-end manufacturing industry.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial heat treatment equipment, and in particular relates to an industrial furnace with controllable cooling speed and application thereof. Background Art

[0002] In the context of the booming development of advanced manufacturing industry, heat treatment of metal materials has received unprecedented attention as a key link to improve material performance and expand its application scope. Heat treatment refers to a metal thermal processing technology that precisely heats, insulates and cools metal materials in the solid state to obtain the expected structure and performance, thereby meeting the increasingly stringent use requirements in different fields.

[0003] Among many metal materials, high-temperature alloys, titanium and titanium alloys, etc., with their excellent high-temperature strength, corrosion resistance and good mechanical properties, occupy an important position in high-end fields such as aerospace, energy and electricity, and shipbuilding. However, the excellent performance of these materials depends largely on precise heat treatment processes, especially the control of cooling speed during the cooling process. However, traditional heat treatment cooling methods, such as air cooling, oil cooling, water cooling and air cooling, often cannot accurately control the cooling speed and can only achieve a relatively extensive cooling effect, which limits the further improvement of material performance and cannot meet the extreme pursuit of material performance in modern high-end manufacturing.

[0004] Industrial furnaces are the core equipment for heat treatment of high-temperature alloys, titanium and titanium alloys. The perfection of their cooling function is directly related to the final performance of the above materials. Most of the industrial furnaces currently on the market use a simple cooling method of shutting down the heating system or opening and closing the furnace door to reduce the temperature inside the furnace. This cooling method has the following disadvantages: First, it cannot guarantee the stability of the cooling rate, which easily leads to internal stress concentration due to uneven temperature changes in the material during the cooling process, thereby affecting the integrity of the material's organizational structure and the consistency of its mechanical properties; second, due to the inability to achieve constant and uniform cooling, it is difficult to meet the precise heat treatment process requirements for special materials that have strict requirements on the cooling rate, such as high-temperature alloys and titanium alloys, so that these materials cannot give full play to their potential high-performance advantages, thereby limiting their further application and development in high-end fields.

[0005] Therefore, developing an industrial furnace that can accurately control the cooling rate has become an urgent problem to be solved in the field of modern material heat treatment, which has important practical significance for promoting technological progress and industrial upgrading in high-end manufacturing.

[0006] In view of this, this invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide an industrial furnace with controllable cooling speed and its application, which is mainly used to solve the problem that the existing industrial furnace cannot cool down at a specific cooling rate during heat treatment, making it difficult to meet the needs of heat treatment of high-temperature alloys, titanium and titanium alloys.

[0008] The purpose of the present invention is to be solved by the following technical solutions:

[0009] In a first aspect, the present invention provides an industrial furnace with controllable cooling speed, comprising a furnace body, a general control system, a heating mechanism, a cooling mechanism and a temperature control mechanism, wherein the general control system is electrically connected to the heating mechanism, the cooling mechanism and the temperature control mechanism, respectively, and is used to cool down the material in the furnace body according to a preset cooling speed by collaboratively controlling the heating mechanism, the cooling mechanism and the temperature control mechanism;

[0010] Wherein, the furnace body includes a furnace shell, a furnace chamber for accommodating materials is constructed inside the furnace shell, and a furnace door for sealing the furnace chamber is installed on one side of the furnace shell. Temperature sensors are evenly arranged inside the furnace chamber for real-time monitoring of temperature information at different positions in the furnace chamber, and the temperature sensors are connected to the overall control system through temperature compensation wires. If there is a difference between the actual temperature in the furnace chamber monitored by the temperature sensor and the theoretical temperature of the preset cooling speed, the temperature is supplemented by controlling the heating mechanism or the cooling mechanism.

[0011] Furthermore, the overall control system includes an electric control cabinet, a heating control system, a cooling control system and a PLC control system. The heating control system and the cooling control system are respectively bidirectionally connected to the PLC control system. The PLC control system is used to receive information feedback from the heating control system and the cooling control system, and send control instructions to the heating control system and the cooling control system.

[0012] Among them, the electric control cabinet is an electric control cabinet with data communication, temperature control and alarm functions, and a touch screen, an electronic temperature recording instrument and an over-temperature alarm are installed on the front panel of the electric control cabinet. At the same time, knobs or button switches for various action controls are also provided for setting relevant parameters.

[0013] Further, the heating mechanism includes a first heating component, a second heating component, a third heating component, a fourth heating component, a fifth heating component and a power regulator, the power regulator is electrically connected to the first heating component, the second heating component, the third heating component, the fourth heating component and the fifth heating component respectively, and the power regulator is connected to the heating control system;

[0014] Wherein, the first heating component, the second heating component, the third heating component, the fourth heating component and the fifth heating component all use resistance wires as heating elements.

[0015] Furthermore, the first heating component is installed on the inner side of the furnace door, the second heating component and the third heating component are installed on both sides of the furnace respectively, the fourth heating component is installed on the bottom of the furnace, and the fifth heating component is installed on the rear side of the furnace.

[0016] Furthermore, the cooling mechanism includes a fan connected to the cooling control system, the fan is connected to a wind hood arranged inside the furnace through an air duct, and is used to transport cooling air into the furnace, and a pressure relief valve is installed on the top of the furnace.

[0017] Furthermore, the cooling mechanism also includes an electric valve, which is installed on the air duct and connected to the cooling control system to adjust the amount of cooling air delivered to the furnace.

[0018] Furthermore, the air hood is a topless quadrangular pyramid structure made of high-temperature alloy plate, the top of the quadrangular pyramid structure is sealed with the air duct, and the four sides of the quadrangular pyramid structure are provided with array holes, and the bottom is a blind plate, which is used to allow cooling air to pass through the air duct and enter the furnace from the array holes on the four sides after being reflected by the blind plate at the bottom of the air hood.

[0019] Furthermore, the temperature uniformity control mechanism includes a stirring motor connected to the PLC control system, the stirring motor is installed on the upper part of the furnace shell, and the main shaft of the stirring motor passes through the furnace and is fixedly connected to the stirring fan blades arranged in the furnace, so that the temperature in the furnace is uniformed by stirring.

[0020] Furthermore, the temperature uniformity control mechanism also includes a chiller connected to the PLC control system, the output port of the chiller is connected to one end of a first circulation pipe, the other end of the first circulation pipe is connected to a cooling water inlet hole in the stirring motor, a water pressure sensor is installed on the first circulation pipe, and the cooling water outlet hole in the stirring motor is connected to the input port of the chiller through a second circulation pipe, forming a closed cooling circulation pipeline system.

[0021] In the second aspect, the present invention provides an application of an industrial furnace based on the above-mentioned controllable cooling rate, wherein the industrial furnace is mainly used for heat treatment of high-temperature alloys, titanium and titanium alloys, and can achieve a cooling rate of 0.3°C / min to 5°C / min from 1200°C to 300°C.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The industrial furnace provided by the present invention is mainly composed of a furnace body, a general control system, a heating mechanism, a cooling mechanism, a temperature control mechanism and a temperature sensor. When the actual temperature in the furnace monitored by the temperature sensor is different from the theoretical temperature of the preset cooling speed, the general control system coordinates the heating, cooling and temperature control mechanisms to perform corresponding temperature compensation or temperature equalization actions, so that the material in the furnace is accurately cooled according to the preset cooling speed, overcoming the problem that the traditional industrial furnace cannot accurately control the cooling speed, meeting the heat treatment process requirements of materials such as high-temperature alloys, titanium and titanium alloys, and improving material performance. In addition, the reasonable layout of the heating mechanism, the stirring effect of the temperature control mechanism, and the unique air hood structure and electric valve adjustment in the cooling mechanism ensure the uniformity of temperature in the furnace, reduce internal stress, and ensure the material structure and mechanical properties; the design of the electric control cabinet and the operation of the PLC control system improve the convenience and controllability of equipment operation; the industrial furnace can achieve operation within a specific temperature range (1200℃~300℃) and cooling speed (0.3℃ / min~5℃ / min), expanding the application scope of high-performance materials and promoting technological progress and industrial upgrading in the high-end manufacturing industry. At the same time, the pressure relief valve and water pressure sensor improve the safety and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0025] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the controllable cooling speed industrial furnace of the present invention;

[0027] Figure 2 It is a schematic diagram of a heating mechanism and a furnace door lifting mechanism in an industrial furnace with controllable cooling speed according to the present invention.

[0028] in:

[0029] 1 is a furnace body; 11 is a furnace shell; 12 is a furnace chamber; 13 is a furnace door; 14 is a furnace door lifting mechanism; 121 is a pressure relief valve; 141 is a lifting motor; 142 is a first lifting sprocket; 143 is a first lifting chain; 144 is a second lifting sprocket; 145 is a second lifting chain;

[0030] 2 is the general control system; 21 is the electric control cabinet; 22 is the heating control system; 23 is the cooling control system; 24 is the PLC control system; 211 is the electronic temperature recording instrument; 212 is the over-temperature alarm;

[0031] 3 is a heating mechanism; 31 is a first heating component; 32 is a second heating component; 33 is a third heating component; 34 is a fourth heating component; 35 is a fifth heating component; 36 is a power regulator;

[0032] 4 is a cooling mechanism; 41 is a fan; 42 is an air duct; 43 is a wind hood; 44 is an electric valve;

[0033] 5 is a temperature control mechanism; 51 is a stirring motor; 52 is a stirring fan; 53 is a chiller; 54 is a first circulation pipeline; 55 is a water pressure sensor; 54 is a second circulation pipeline; 6 is a temperature sensor. DETAILED DESCRIPTION

[0034] Here, exemplary embodiments will be described in detail. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples consistent with some aspects of the present invention as detailed in the appended claims.

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] See also Figures 1-2 , an industrial furnace with controllable cooling speed provided by an embodiment of the present invention is mainly composed of a furnace body 1, a general control system 2, a heating mechanism 3, a cooling mechanism 4 and a temperature control mechanism 5. Among them, the general control system 2 is electrically connected to the heating mechanism 3, the cooling mechanism 4 and the temperature control mechanism 5 respectively, and it coordinates and controls the operating states of the heating mechanism 3, the cooling mechanism 4 and the temperature control mechanism 5 to ensure that the material inside the furnace body 1 can be cooled strictly according to the preset cooling speed, thereby providing a feasible solution for materials such as high-temperature alloys, titanium and titanium alloys that have special requirements for cooling speed during heat treatment, which helps to further explore the potential performance advantages of these high-performance materials and meet the stringent requirements for high-precision heat treatment of materials in the fields of aerospace, energy and electricity, and shipbuilding.

[0037] Specifically, in the embodiment of the present invention, the furnace body 1 includes a furnace shell 11, and a furnace chamber 12 for accommodating materials is constructed inside the furnace shell 11. A pressure relief valve 121 is installed on the top of the furnace chamber 12. When the pressure in the furnace is greater than the set safety pressure value, the pressure relief valve automatically opens to ensure the safety of operation. A furnace door 13 for sealing the furnace chamber 12 is installed on one side of the furnace shell 11, and the opening and closing actions of the furnace door 13 are realized by a furnace door lifting mechanism 14. Preferably, the furnace door lifting mechanism 14 includes a lifting motor 141 fixedly arranged above the furnace door 13, and a first lifting sprocket 142 and a second lifting sprocket 144 are fixedly arranged at intervals on the rotating shaft of the lifting motor 141, wherein the first lifting sprocket 142 is connected to the furnace door 13 by means of a first lifting chain 143, and the second lifting sprocket 144 is connected to the furnace door 13 by a second lifting chain 145. Such a design can facilitate the material to smoothly pass through the furnace door 13 in and out of the furnace chamber 12, effectively improving the convenience and efficiency of material heat treatment.

[0038] In an embodiment of the present invention, the overall control system 2 includes an electric control cabinet 21, a heating control system 22, a cooling control system 23 and a PLC control system 24. Among them, a two-way connection channel is established between the PLC control system 24 and the heating control system 22 and the cooling control system 23, respectively, so that various information feedbacks from the heating control system 22 and the cooling control system 23 can be received in real time; based on these feedback data, the PLC control system 24 can quickly and accurately send corresponding control instructions to the two. Through this efficient information interaction and control mechanism, when the temperature in the furnace deviates from the preset value, the heating control system 22 can drive the heating mechanism 3 to perform a temperature increase compensation operation, or the cooling control system 23 can control the cooling mechanism 4 to perform a temperature reduction compensation action, ensuring that the temperature in the furnace body 1 always accurately follows the preset temperature curve change, which effectively guarantees the accuracy and stability of the temperature control of the industrial furnace.

[0039] Among them, the electric control cabinet 21, as the key core hardware of the overall control system 2, is an electric control cabinet that integrates data communication capabilities, precise temperature control functions and reliable alarm functions. Its front panel is equipped with a touch screen, an electronic temperature recorder 211 and an over-temperature alarm 212, and multiple knobs or button switches for various action controls are also set. The operator can conveniently set various relevant parameters during the operation of the industrial furnace through these interactive components, such as heating power, cooling air volume, target temperature, cooling speed, etc., which greatly improves the convenience and flexibility of equipment operation, allowing the industrial furnace to quickly and accurately adjust parameters according to different process requirements, effectively meeting diverse production requirements.

[0040] The present invention sets a plurality of high-precision temperature sensors 6 in a uniformly distributed manner inside the furnace 12. These temperature sensors 6 can monitor the temperature information of different positions in the furnace 12 in real time and accurately, and stably transmit the collected data to the general control system 2 through the temperature compensation wire, and display it through the electronic temperature recording instrument 211, so that the operator can intuitively understand the temperature distribution in the furnace at any time. When the actual temperature in the furnace 12 monitored by the temperature sensor 6 differs from the theoretical temperature corresponding to the cooling speed pre-set on the electric control cabinet 21, the PLC control system 24 will respond immediately, and quickly and accurately control the heating mechanism 3 or the cooling mechanism 4 to perform corresponding temperature supplement operations through the heating control system 22 and the cooling control system 23, so as to ensure that the cooling process of the material in the furnace 12 is strictly carried out according to the preset cooling speed, effectively avoiding the material heat treatment quality problems caused by temperature fluctuations, and providing reliable guarantee for product quality. In addition, when an abnormal condition occurs during the operation of the equipment or the temperature compensation exceeds the required temperature within the set time, the system will automatically trigger the over-temperature alarm 212 and send an alarm signal to the operator in time so that the operator can quickly check and eliminate the relevant faults to ensure the safe and stable operation of the equipment.

[0041] In addition, it is worth noting that when the temperature difference detected by the multiple temperature sensors 6 in the furnace 12 is greater than the set threshold, it indicates that the temperature distribution in the furnace is not uniform enough to meet the requirements. At this time, the PLC control system 24 will quickly adjust the temperature control mechanism 5 to improve the temperature uniformity in the furnace 12, ensure the consistency of the temperature in various places in the furnace, further optimize the heating environment of the material during the heat treatment process, and improve the stability and consistency of product quality to meet the strict requirements of modern industrial production for high-precision and high-quality heat treatment processes.

[0042] Specifically, in the embodiment of the present invention, the temperature uniformity control mechanism 5 includes a stirring motor 51 connected to the PLC control system 24, the stirring motor 51 is installed on the upper part of the furnace shell 11, and the main shaft of the stirring motor 51 passes through the furnace 12 and is fixedly connected to the stirring blade 52 arranged in the furnace 12. Since the stirring blade 52 is in a relatively closed environment of the furnace 12, when the temperature in the furnace is uneven, especially when compensatory cold air or hot air is newly added to the furnace 12, the cold and hot molecules of different temperatures in the furnace 12 are stirred to fully interact and collide, thereby realizing an efficient heat exchange process, and prompting various areas in the furnace 12 that originally had temperature differences to quickly tend to uniform temperature.

[0043] Preferably, in order to ensure the long-term stable operation of the stirring motor 51, the present invention specifically sets a cooling measure for the stirring motor 51, which includes a chiller 53 connected to the PLC control system 24, the output port of the chiller 53 is connected to one end of the first circulation pipeline 54, the other end of the first circulation pipeline 54 is connected to the cooling water inlet and outlet holes of the stirring motor 51 (the stirring motor 51 is selected to have an internal circulation cooling system), a water pressure sensor 55 is installed on the first circulation pipeline 54, and the cooling water outlet hole in the stirring motor 51 is connected to the input port of the chiller 53 through the second circulation pipeline 56, forming a closed cooling circulation pipeline system. Among them, the water pressure sensor 55 can measure the water pressure of the cold water in the first circulation pipeline 54 in real time, and feed back the relevant data to the PLC control system 24, so that the PLC control system 24 can timely adjust the operating parameters (such as water pump speed, refrigeration power, etc.) of the chiller 53 according to the water pressure change, to ensure the stable operation of the entire cooling circulation pipeline system.

[0044] In the embodiment of the present invention, the heating mechanism 3 includes a first heating component 31, a second heating component 32, a third heating component 33, a fourth heating component 34, a fifth heating component 35 and a power regulator 36. The power regulator 36 is a key power control component, which is electrically connected to the first heating component 31, the second heating component 32, the third heating component 33, the fourth heating component 34 and the fifth heating component 35 respectively; at the same time, the power regulator 36 is also connected to the heating control system 22, and the power regulator 36 is installed on the electric control cabinet 21, and is electrically connected to the external power supply through the line, so as to ensure that the entire heating mechanism 3 can obtain a stable and controllable power supply to meet the heating requirements under different working conditions.

[0045] Specifically, each heating component has a specific installation position layout in the furnace 12. The first heating component 31 is installed on the inner side of the furnace door 13. When the furnace door 13 is closed, it can effectively heat the area near the furnace door 13 to reduce heat loss; the second heating component 32 and the third heating component 33 are installed on both sides of the furnace 12, respectively, the fourth heating component 34 is installed at the bottom of the furnace 12, and the fifth heating component 35 is installed on the rear side of the furnace 12. Through the above layout design, except for the top of the furnace 12, the heating components are reasonably arranged on the other five sides of the furnace 12, forming an all-round and multi-angle heating system, which greatly improves the uniformity and stability of the temperature distribution in the furnace 12. In addition, it should be noted that all of the above heating components use resistance wire as the heating element. When in use, the power regulator 36 is accurately regulated by the heating control system 22, and then the electric power applied to each resistance wire is controlled to achieve accurate regulation of the heat generated by each heating component.

[0046] In the embodiment of the present invention, the cooling mechanism 4 includes a fan 41 connected to the cooling control system 23, and the fan 41 is connected to the air hood 43 arranged inside the furnace 12 through the air duct 42, and an electric valve 44 is also installed on the air duct 42, and the electric valve 44 is also connected to the cooling control system 23. The cooling control system 23 can adjust the speed of the fan 41 according to the preset cooling parameters and the temperature and other related information fed back in real time from the furnace 12, and adjust the speed and flow rate of the cooling air by changing the speed of the fan 41; on the other hand, the cooling control system 23 can also control the opening and closing size of the electric valve 44, so as to change the ventilation cross-sectional area of ​​the air duct 42, and then further finely adjust the cooling air volume entering the furnace 12 through the air duct 42. Through this two-pronged control method, the cooling control system 23 can accurately control the air volume of the cooling air delivered to the furnace 12.

[0047] Preferably, the present invention fully considers the importance of uniform distribution of cooling air in the furnace 12 for achieving precise cooling, and therefore optimizes the design of the structure of the air hood 43. Since the working environment of the air hood 43 is the high-temperature furnace 12, it faces the severe test of high temperature. Therefore, in terms of material selection, the air hood 43 is made of high-temperature alloy plate. From the perspective of structural design, the air hood 43 is designed as a topless quadrangular pyramid, the top of which is sealed and connected to the air duct 42, and array holes are evenly arranged on the four sides of the quadrangular pyramid. The layout of these array holes has been accurately calculated and designed to ensure that the cooling air can enter the furnace 12 from all directions in a relatively balanced state; at the same time, the bottom of the air hood 43 adopts a blind plate structure, so that when the cooling air enters the air hood 43 along the air duct 42, it will first hit the blind plate at the bottom, and after the reflection of the blind plate, the flow direction of the cooling air changes, and then it is orderly and evenly dispersed into the furnace 12 from the array holes evenly distributed on the four sides. Through the above structural design, the uniformity of the cooling air distribution in the furnace 12 can be greatly improved. In addition, with the synergistic effect of the temperature control mechanism 5, the materials at different positions in the furnace 12 can be quickly and evenly cooled.

[0048] In summary, the industrial furnace provided by the present invention has obvious advantages. It controls the heating mechanism 3 and the cooling mechanism 4 through the linkage of the heating control system 22 and the cooling control system 23, and cooperates with the temperature control mechanism 5, so that the industrial furnace can achieve a temperature of 1200℃~300℃ at a rate of 0.3℃ / min~5℃ / min, meeting the requirements of different heat treatment processes for metal materials such as high-temperature alloys, titanium and titanium alloys on the cooling rate. At the same time, the entire industrial furnace transformation is relatively simple and easy to promote and implement.

[0049] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0050] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. An industrial furnace with controllable cooling speed, characterized in that: The invention comprises a furnace body (1), a general control system (2), a heating mechanism (3), a cooling mechanism (4) and a temperature control mechanism (5), wherein the general control system (2) is electrically connected to the heating mechanism (3), the cooling mechanism (4) and the temperature control mechanism (5) respectively, and is used to cool the material in the furnace body (1) according to a preset cooling speed by cooperatively controlling the heating mechanism (3), the cooling mechanism (4) and the temperature control mechanism (5); The furnace body (1) comprises a furnace shell (11), a furnace chamber (12) for accommodating materials is formed inside the furnace shell (11), and a furnace door (13) for sealing the furnace chamber (12) is installed on one side of the furnace shell (11). Temperature sensors (6) are evenly arranged inside the furnace chamber (12) for real-time monitoring of temperature information at different positions in the furnace chamber (12), and the temperature sensors (6) are connected to the overall control system (2) via a temperature compensation wire. If there is a difference between the actual temperature in the furnace chamber (12) monitored by the temperature sensor (6) and the theoretical temperature of a preset cooling speed, the temperature is supplemented by controlling the heating mechanism (3) or the cooling mechanism (4).

2. The industrial furnace with controllable cooling speed according to claim 1, characterized in that: The overall control system (2) comprises an electric control cabinet (21), a heating control system (22), a cooling control system (23) and a PLC control system (24); the heating control system (22) and the cooling control system (23) are respectively bidirectionally connected to the PLC control system (24); the PLC control system (24) is used to receive information feedback from the heating control system (22) and the cooling control system (23), and simultaneously issue control instructions to the heating control system (22) and the cooling control system (23); The electric control cabinet (21) is an electric control cabinet with data communication, temperature control and alarm functions, and a touch screen, an electronic temperature recording instrument (211) and an over-temperature alarm (212) are installed on the front panel of the electric control cabinet (21), and knobs or button switches for various action controls are also provided for setting relevant parameters.

3. The industrial furnace with controllable cooling speed according to claim 2, characterized in that: The heating mechanism (3) comprises a first heating component (31), a second heating component (32), a third heating component (33), a fourth heating component (34), a fifth heating component (35) and a power regulator (36); the power regulator (36) is electrically connected to the first heating component (31), the second heating component (32), the third heating component (33), the fourth heating component (34) and the fifth heating component (35), respectively, and the power regulator (36) is connected to a heating control system (22); Wherein, the first heating component (31), the second heating component (32), the third heating component (33), the fourth heating component (34) and the fifth heating component (35) all use resistance wires as heating elements.

4. The industrial furnace with controllable cooling speed according to claim 3, characterized in that: The first heating component (31) is installed on the inner side of the furnace door (13), the second heating component (32) and the third heating component (33) are installed on both sides of the furnace (12), respectively, the fourth heating component (34) is installed at the bottom of the furnace (12), and the fifth heating component (35) is installed on the rear side of the furnace (12).

5. The industrial furnace with controllable cooling speed according to claim 2, characterized in that: The cooling mechanism (4) comprises a fan (41) connected to a cooling control system (23); the fan (41) is connected to a wind hood (43) arranged inside the furnace (12) through an air duct (42) and is used to transport cooling air into the furnace (12); and a pressure relief valve (121) is installed on the top of the furnace (12).

6. The industrial furnace with controllable cooling speed according to claim 5, characterized in that: The cooling mechanism (4) further comprises an electric valve (44), which is installed on the air duct (42) and connected to the cooling control system (23) for adjusting the air volume of cooling air delivered into the furnace (12).

7. The industrial furnace with controllable cooling speed according to claim 5, characterized in that: The air scattering hood (43) is a topless quadrangular pyramid structure made of a high-temperature alloy plate. The top of the quadrangular pyramid structure is sealed and connected to the air duct (42). The four sides of the quadrangular pyramid structure are provided with array holes, and the bottom is a blind plate, so that cooling air passes through the air duct (42) and is reflected by the blind plate at the bottom of the air scattering hood (43) before entering the furnace (12) from the array holes on the four sides.

8. The industrial furnace with controllable cooling speed according to claim 2, characterized in that: The temperature uniformity control mechanism (5) comprises a stirring motor (51) connected to a PLC control system (24); the stirring motor (51) is installed on the upper part of the furnace shell (11); the main shaft of the stirring motor (51) passes through the furnace (12) and is fixedly connected to a stirring fan blade (52) arranged in the furnace (12); the temperature in the furnace (12) is made uniform by stirring.

9. The industrial furnace with controllable cooling speed according to claim 8, characterized in that: The temperature control mechanism (5) further comprises a water chiller (53) connected to the PLC control system (24); the output port of the water chiller (53) is connected to one end of a first circulation pipe (54); the other end of the first circulation pipe (54) is connected to a cooling water inlet hole in the stirring motor (51); a water pressure sensor (55) is installed on the first circulation pipe (54); the cooling water outlet hole in the stirring motor (51) is connected to the input port of the water chiller (53) via a second circulation pipe (56), thereby forming a closed cooling circulation pipeline system.

10. An application of an industrial furnace with controllable cooling rate according to any one of claims 1 to 9, characterized in that: The industrial furnace is mainly used for heat treatment of high-temperature alloys, titanium and titanium alloys, and can achieve cooling from 1200°C to 300°C at a speed of 0.3°C / min to 5°C / min.

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