A multifunctional high frequency heating annealing furnace

Abstract

The present invention provides a multifunctional high-frequency heating annealing furnace, which includes: a base, a furnace door bin, a heating bin, a top cover device, a loading platform and a lifting device. The base is provided with a support frame, the furnace door bin is installed on the base, the heating bin is arranged on the furnace door bin and connected to the base through the support frame, the top cover device is arranged on the top of the heating bin, and the loading platform is arranged inside the furnace door bin and the heating bin. The furnace door bin includes a furnace bin body and a furnace door, and a gas interface and a pump interface are provided on the furnace bin body. The heating bin includes: a hot bin body, a fixed frame, a mixed spiral coil and a heat-insulating furnace brick. The fixed frame is arranged on the hot bin body, the mixed spiral coil is arranged on the periphery of the hot bin body, and the heat-insulating furnace brick is installed on the inner wall of the hot bin body; the mixed spiral coil is a hollow structure, and a conductive wire tube and a cooling water pipe are arranged inside the mixed spiral coil. The multifunctional high-frequency heating annealing furnace can meet the needs of different cooling methods, and at the same time simplify the operation steps to provide convenience for the operator.

Description

Technical Field

[0001] The invention relates to the technical field of heating furnaces, in particular to a multifunctional high-frequency heating annealing furnace. Background Art

[0002] High-frequency heating annealing furnace is a device that uses high-frequency electromagnetic induction to heat the workpiece. The electromagnetic field generated by the current in the induction coil converts electrical energy into thermal energy to achieve heating and melting of metal materials. By controlling the output power and working time of the power supply, the heating process can be precisely controlled. It has the advantages of high efficiency and energy saving, fast heating speed, and precise temperature control, and is widely used in various fields.

[0003] The traditional vacuum atmosphere annealing furnace can neither achieve short-term high-temperature annealing nor heat treatment with different cooling methods. Moreover, the traditional multifunctional heating furnace adopts the method of resistance wire heating, which has a slow heating rate and uneven temperatures in various areas of the furnace during the initial heating. At the same time, the degree of automation is low, requiring operators to follow up and handle, which is cumbersome to operate.

[0004] To this end, how to design a multifunctional high-frequency heating annealing furnace that can meet the needs of different annealing cooling methods while simplifying the operating steps and providing convenience for the operator is a technical problem that technicians in this field need to solve. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multifunctional high-frequency heating annealing furnace that can meet the needs of different annealing cooling methods while simplifying the operating steps and providing convenience for the operator.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A multifunctional high-frequency heating annealing furnace, comprising: a base, a furnace door bin, a heating bin, a top cover device, a loading platform and a lifting device, wherein the base is provided with a support frame, the furnace door bin is installed on the base, the heating bin is arranged on the furnace door bin and connected to the base through the support frame, the top cover device is arranged on the top of the heating bin, the loading platform is slidably arranged inside the furnace door bin and the heating bin, and the lifting device drives the loading platform to move;

[0008] The furnace door bin comprises a furnace bin body and a furnace door, and the furnace bin body is provided with a gas interface and a pump interface;

[0009] The heating chamber includes: a heating chamber body, a fixing frame, a mixed spiral coil, and insulating furnace bricks. The fixing frame is installed on the heating chamber body, the mixed spiral coil is sleeved on the periphery of the heating chamber body through the fixing frame, and the insulating furnace bricks are installed on the inner wall of the heating chamber body. The mixed spiral coil is a hollow structure, and a conductive wire tube and a cooling water pipe are arranged inside the mixed spiral coil.

[0010] In one embodiment, the stage is a columnar structure, and a plurality of holding protrusions are provided on the outer wall of the stage, and the plurality of holding protrusions are distributed in a circular array with the center of the stage as the center;

[0011] The clamping protrusion is provided with a positioning inclined surface and a guiding conical surface;

[0012] The inner wall of the heat-insulating furnace brick is provided with a plurality of bosses distributed in a circular array, and an avoidance channel is formed between two adjacent bosses, and the avoidance channel is used to avoid the clamping protrusion, and each of the bosses is provided with a positioning inclined groove, and the positioning inclined groove cooperates with the positioning inclined surface of the clamping protrusion;

[0013] A plurality of blocking nails are arranged on the inner wall of the heat-insulating furnace brick, the blocking nails are matched with the guide cone surface of the clamping protrusion, and the blocking nails are located above the boss.

[0014] In one embodiment, the lifting device comprises: a nut-type turbine screw lifting module, a lifting plate, a lifting rod and a lifting seat;

[0015] The nut-type turbine screw lifting module is arranged in the base, and the nut-type turbine screw lifting module drives the lifting plate to move. The lifting rod is arranged between the lifting plate and the lifting seat. The lifting seat is provided with a receiving groove, and the loading platform is placed in the receiving groove; the lifting plate drives the loading platform to perform lifting movement through the lifting seat.

[0016] In one of the embodiments, a plurality of heat insulating sheets are provided on the outer wall of the supporting seat, the plurality of heat insulating sheets are arranged at intervals, and there is a gap between the edge of the heat insulating sheets and the inner wall of the furnace chamber body.

[0017] In one embodiment, the nut-type turbine screw lifting module includes: an elevator, a screw and a guide column. The elevator is installed in the base, the elevator drives the screw to rotate, the screw and the lifting plate are driven and connected by a nut, and the guide column is used to limit and guide the movement of the lifting plate.

[0018] In one embodiment, the top cover device includes: an end cover, a heat insulation component and a temperature monitoring component, the end cover is arranged on the top of the heating chamber, and the end cover is connected to the support frame through a pressing plate;

[0019] The thermal insulation component is located inside the heat storage body, and includes a connecting rod and a plurality of high-temperature partitions. The end of the connecting rod is arranged on the end cover and passes through a plurality of the high-temperature partitions. A gap is formed between two adjacent high-temperature partitions, and there is a gap between the high-temperature partition and the inner wall of the heat storage body.

[0020] In one embodiment, the temperature monitoring component includes a thermocouple probe, which is mounted on the end cover and has a distal end extending into the heat chamber body.

[0021] In one of the embodiments, an exhaust safety valve is provided on the end cover. When the air pressure in the heating chamber exceeds a specified limit, the exhaust safety valve will be opened to achieve pressure relief and exhaust.

[0022] In one of the embodiments, a connecting plate is provided between the heating chamber and the furnace door chamber, and between the furnace door chamber and the base, a water cooling channel is opened in the connecting plate, and a cooling interface connected to the water cooling channel is provided on the connecting plate.

[0023] In one of the embodiments, a controller and a control panel are provided on the base, and the control panel is electrically connected to the controller.

[0024] In summary, the multifunctional high-frequency heating annealing furnace of the present invention can meet the requirements of different cooling methods, while simplifying the operating steps and providing convenience for the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of the multifunctional high-frequency heating annealing furnace of the present invention;

[0027] Figure 2 for Figure 1 A partial cross-sectional view of the multifunctional high-frequency heating annealing furnace shown;

[0028] Figure 3 for Figure 1 A schematic plan view of a multifunctional high frequency heating annealing furnace is shown;

[0029] Figure 4 for Figure 2 A partial exploded schematic diagram of a multifunctional high frequency heating annealing furnace is shown;

[0030] Figure 5 for Figure 4 The schematic diagram of the structure of the heat-insulating furnace bricks and the stage shown;

[0031] Figure 6 Schematic diagram of the matching state of the holding protrusion and the heat-insulating furnace brick when the stage is rising (I);

[0032] Figure 7 Schematic diagram of the matching state of the holding protrusion and the heat-insulating furnace brick when the stage is rising (II);

[0033] Figure 8 It is a schematic diagram of the matching state of the holding protrusion and the heat-insulating furnace brick when the stage is stopped;

[0034] Fig. 9 for Figure 2 Schematic diagram of the structure of the insulation component shown. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] The present invention provides a multifunctional high frequency heating annealing furnace 10, such as Figure 1 and Figure 2 As shown, it includes: a base 100, a furnace door chamber 200, a heating chamber 300, a top cover device 400, a loading platform 500 and a lifting device 600.

[0039] Among them, a support frame 110 is provided on the base 100, the furnace door chamber 200 is installed on the base 100, the heating chamber 300 is arranged on the furnace door chamber 200 and is connected to the base 100 through the support frame 110, the top cover device 400 is covered on the top of the heating chamber 300, the loading platform 500 is slidably arranged inside the furnace door chamber 200 and the heating chamber 300, and the lifting device 600 drives the loading platform 500 to move.

[0040] like Figure 3 As shown, the furnace door bin 200 includes a furnace bin body 210 and an openable furnace door 220, and the furnace bin body 210 is provided with a gas interface 211 and a pump interface 212. When a negative pressure environment is required in the furnace bin body 210, the pump interface 212 is connected to an external vacuum pump through a pipeline to extract the gas in the furnace bin body 210, thereby achieving negative pressure; in addition, an inert gas can be injected into the furnace bin body 210 through the gas interface 211 to replace the air in the furnace bin body 210, thereby preventing the workpiece from being oxidized during the cooling process.

[0041] like Figure 2 and Figure 3 As shown, the heating chamber 300 includes: a heating chamber body 310, a fixing frame 320, a mixed spiral coil 330, and a heat-insulating furnace brick 340. The fixing frame 320 is arranged on the heating chamber body 310, the mixed spiral coil 330 is sleeved on the periphery of the heating chamber body 310 through the fixing frame 320, and the heat-insulating furnace brick 340 is installed on the inner wall of the heating chamber body 310. In addition, the mixed spiral coil 330 is a hollow structure, and a conductive wire tube and a cooling water pipe (not shown) are arranged inside the mixed spiral coil 330.

[0042] The base 100 is provided with a controller (not shown) and a control panel 120 (such as Figure 2 As shown in FIG. 1 , the control panel 120 is electrically connected to the controller, and the controller is also electrically connected to the conductive wire tube. When heating, the controller introduces high-frequency alternating current into the conductive wire tube, thereby utilizing electromagnetic induction to heat the workpiece.

[0043] In this embodiment, if Figure 2 and Figure 3 As shown, the lifting device 600 includes: a nut-type turbine screw lifting module 610, a lifting plate 620, a lifting rod 630 and a lifting seat 640. The nut-type turbine screw lifting module 610 is arranged in the base 100, and the nut-type turbine screw lifting module 610 drives the lifting plate 620 to move. The lifting rod 630 is arranged between the lifting plate 620 and the lifting seat 640, and the lifting seat 640 is provided with a receiving groove 641 (such as Figure 4 As shown in FIG. 6 , the loading platform 500 is placed in the receiving groove 641. During operation, the lifting plate 620 drives the loading platform 500 to move up and down through the lifting seat 640.

[0044] Preferably, Figure 3 As shown, the nut-type turbine screw lifting module 610 includes: an elevator (not shown), a screw 611 and a guide column 612. The elevator is installed in the base 100. The elevator drives the screw 611 to rotate. The screw 611 and the lifting plate 620 are connected by a nut. The guide column 612 is used to limit and guide the movement of the lifting plate 620. When the elevator is started, the screw 611 rotates, thereby driving the nut and the lifting plate 620 to move up and down, and the lifting plate 620 drives the lifting rod 630 and the lifting seat 640 thereon to move together.

[0045] In combination with the above structure, the main working principle of the multifunctional high-frequency heating annealing furnace 10 of the present invention is described below:

[0046] Initially, the lifting seat 640 and the stage 500 are inside the furnace chamber body 210 and close to the bottom. At this time, the staff can place the workpiece on the stage 500 through the furnace door 220, and then close the furnace door 220 to form a closed space inside the furnace chamber body 210 and the hot chamber body 310. Then, the nut-type turbine screw lifting module 610 drives the lifting plate 620 and the lifting seat 640 to rise, and the stage 500 and the workpiece also rise together until they reach the inside of the hot chamber body 310. Next, a high-frequency current is passed through the conductive wire tube in the mixed spiral coil 330, and electromagnetic induction is used to heat the workpiece. During this process, the workpiece heats up rapidly until the temperature reaches a stable value;

[0047] Then, according to different cooling methods, operations are selectively performed to meet the needs of different cooling methods. For example, when rapid cooling is required, the cooling water pipe in the mixed spiral coil 330 is passed with flowing coolant, so as to quickly reduce the temperature of the hot chamber body 310, thereby quickly reducing the ambient temperature of the workpiece; when vacuum cooling is required, the lifting plate 620 brings the carrier 500 and the workpiece down to the furnace chamber body 210, and then the external vacuum pump extracts the air in the furnace chamber body 210 to form a negative pressure; when air cooling is required, the carrier 500 and the workpiece are lowered into the furnace chamber body 210, and then the external blower replenishes inert gas into the furnace chamber body 210 through the gas interface 211, and the vacuum pump cooperates to extract air, thereby forming an airflow in the furnace chamber body 210 to achieve air cooling; when water cooling or oil cooling is required, the carrier 500 and the workpiece are lowered to the bottom of the furnace chamber body 210, and then the staff opens the furnace door 220, clamps the workpiece out and immediately soaks it in cooling water or cooling oil.

[0048] It should be particularly noted that, compared with the existing heating furnaces, the multifunctional high-frequency heating annealing furnace 10 of the present invention has the following benefits: First, it can perform different heat treatment methods on the workpiece. The present invention provides two through-bin bodies, the furnace bin body 210 and the heat bin body 310, so that the workpiece can move inside to meet different cooling requirements, thereby improving the compatibility and application scope of the multifunctional high-frequency heating annealing furnace 10; second, the present invention adopts electromagnetic induction for heating. Compared with the traditional heating method using electric heating wires, the electromagnetic induction heating method can make the workpiece heated more evenly and faster, thereby improving the heating efficiency and avoiding uneven heating.

[0049] Furthermore, since the temperature in the heating chamber 300 is high during the heating process, if the lifting seat 640 and the lifting rod 630 remain in the heating chamber 300, they will be affected by the high temperature, which can easily damage the lifting seat 640 and the lifting rod 630 and affect their service life; if the lifting seat 640 and the lifting rod 630 are replaced with the high temperature resistant material of the stage 500, the production cost and the difficulty of processing and manufacturing will increase. For this reason, the multifunctional high frequency heating annealing furnace 10 of the present invention is specially designed so that the stage 500 can automatically detach from the lifting seat 640 before heating. In this way, when heating, the lifting seat 640 and the lifting rod 630 can be away from the heating chamber 300, thereby reducing the influence of high temperature on both.

[0050] Specifically, Figure 5 As shown, the stage 500 is a columnar structure, and a plurality of clamping protrusions 510 are arranged on the outer wall of the stage 500, and the plurality of clamping protrusions 510 are distributed in a circular array with the center of the stage 500 as the center. Among them, the clamping protrusions 510 are provided with a positioning inclined surface 511 and a guiding conical surface 512.

[0051] like Figure 5 As shown, a plurality of bosses 341 distributed in a circular array are provided on the inner wall of the insulating furnace brick 340, and an avoidance channel 342 is formed between two adjacent bosses. The avoidance channel 342 is used to avoid the clamping protrusion 510, and each boss 341 is provided with a positioning bevel groove 343, which cooperates with the positioning inclined surface 511 of the clamping protrusion 510.

[0052] like Figure 5 As shown, a plurality of blocking pins 344 are further provided on the inner wall of the heat-insulating furnace brick 340 . The blocking pins 344 cooperate with the guide cone surface 512 of the clamping protrusion 510 , and the blocking pins 344 are located above the boss 341 .

[0053] The working principle of the automatic separation of the stage 500 is as follows:

[0054] Initially, the stage 500 is placed on the lifting seat 640, and the holding protrusion 510 of the stage 500 and the avoidance channel 342 are aligned with each other in the vertical direction;

[0055] When heating is ready, the lifting rod 630, together with the lifting seat 640, the stage 500 and the workpiece, rises to the heating chamber 300. At this time, the holding protrusion 510 of the stage 500 passes through the avoidance channel 342 (such as Figure 6 As the lifting seat 640 moves upward, the guide conical surface 512 of the holding protrusion 510 will eventually press against the blocking pin 344. In addition, under the cooperation between the blocking pin 344 and the guide conical surface 512, the stage 500 will be subjected to a rotational torque and rotate a small angle (as shown in FIG. Figure 7 As shown in FIG. 3 , after the rotation, the holding protrusion 510 of the stage 500 will be staggered with the avoidance channel 342 , and the positioning inclined surface 511 of the holding protrusion 510 begins to point to the positioning inclined groove 343 ;

[0056] Then, the lifting rod 630 and the lifting seat 640 are lowered back to the furnace door chamber 200. The loading platform 500 lacks support and tends to fall under the action of gravity. Since the positioning inclined surface 511 falls into the positioning inclined groove 343, the loading platform 500 will rotate while descending under the action of the inclined surface until the positioning inclined surface 511 is completely stuck in the positioning inclined groove 343 (such as Figure 8 At this time, the loading platform 500 is held in the heating chamber 300 and is separated from the lifting seat 640;

[0057] After the heating is completed, the lifting rod 630 moves up with the lifting seat 640, and the lifting seat 640 lifts the loading platform 500 again until the clamping protrusion 510 of the loading platform 500 touches the blocking nail 344 again. The blocking nail 344 cooperates with the guide cone 512 again, so that the loading platform 500 rotates a small angle again. After the rotation, the clamping protrusion 510 is staggered with the positioning inclined groove 343, and the positioning inclined surface 511 points to the avoidance channel 342. Subsequently, the lifting seat 640 moves down with the loading platform 500, and the positioning inclined surface 511 will abut against the edge of the avoidance channel 342, and push the loading platform 500 to rotate again until the clamping protrusion 510 completely slides into the avoidance channel 342. At this time, the loading platform 500 is no longer clamped with the heat-insulating furnace brick 340, and the loading platform 500 is lowered to the furnace door chamber 200 together with the lifting seat 640.

[0058] It can be seen that compared with the existing heating furnace, the carrier 500 of the present invention can be automatically separated from the lifting seat 640. Therefore, during the heating process, only the carrier 500 and the workpiece thereon are in the heating chamber 300, and the lifting seat 640 and the lifting rod 630 can fall back into the furnace door chamber 200. In addition, since the carrier 500 blocks the passage between the heating chamber body 310 and the furnace chamber body 210 over a large area, the heat transfer speed is slow, thereby reducing the temperature in the furnace chamber body 210, and also reducing the influence of high temperature on the lifting seat 640 and the lifting rod 630.

[0059] Preferably, Figure 4 As shown, a plurality of heat insulating sheets 642 are arranged on the outer wall of the lifting seat 640, and the plurality of heat insulating sheets 642 are arranged at intervals, and there is a gap between the edge of the heat insulating sheet 642 and the inner wall of the furnace chamber body 210. The heat insulating sheet 642 is designed to slow down the transfer speed of heat, that is, when the heat is transferred from the upper part of the lifting seat 640 to the lifting rod 630, it needs to pass through a plurality of heat insulating sheets 642. Since the air flow at the plurality of heat insulating sheets 642 is poor, the heat insulating sheets 642 have a certain heat preservation function, which not only reduces the temperature at the lifting rod 630, but also prevents the temperature of the heating chamber 300 from being lost too quickly.

[0060] In this embodiment, if Figure 2 As shown, the top cover device 400 includes: an end cover 410, a heat insulation component 420 and a temperature monitoring component 430. The end cover 410 is arranged on the top of the heating chamber 300, and the end cover 410 is connected to the support frame 110 through a pressing plate 411 (as shown in FIG. Fig. 9 shown).

[0061] The heat insulation assembly 420 is located inside the heat chamber body 310. Fig. 9 As shown, the heat insulation assembly 420 includes a connecting rod 421 and a plurality of high temperature baffles 422. The end of the connecting rod 421 is arranged on the end cover 410 and penetrates a plurality of high temperature baffles 422. A gap is formed between two adjacent high temperature baffles 422, and there is a gap between the high temperature baffles 422 and the inner wall of the heat chamber body 310.

[0062] The function of the heat insulation assembly 420 is similar to that of the above-mentioned heat insulation sheet 642. The mutually spaced arrangement of the multiple high-temperature baffles 422 can reduce the fluidity of the gas there, thereby slowing down the heat transfer speed, preventing the high temperature in the heat chamber body 310 from being quickly transferred to the position of the top cover device 400, reducing the impact of the high temperature on the end cover 410 and the temperature monitoring assembly 430, and preventing the temperature in the heat chamber body 310 from being lost too quickly.

[0063] Preferably, the temperature monitoring assembly 430 includes a thermocouple probe 431 (eg Fig. 9As shown in FIG. 1 , the galvanic probe 431 is mounted on the end cover 410 and its end is inserted into the heat chamber body 310. The galvanic probe 431 is connected to the controller in the base 100, which can detect the actual temperature of the air in the heat chamber body 310 and observe the difference between the actual temperature and the set temperature so that the controller can make timely adjustments.

[0064] Preferably, an exhaust safety valve (not shown) is provided on the end cover 410. When the air pressure in the heating chamber 300 exceeds a specified limit, the exhaust safety valve will be opened to release pressure and exhaust air to prevent accidents.

[0065] In this embodiment, if Figure 3 As shown, a connection plate 700 is provided between the heating chamber 300 and the furnace door chamber 200, and between the furnace door chamber 200 and the base 100. A water cooling channel (not shown) is provided in the connection plate 700, and a cooling interface 701 connected to the water cooling channel is provided on the connection plate 700. When rapid cooling is required, the staff introduces circulating cooling water into the connection plate 700 through the cooling interface 701, thereby quickly taking away the heat at the connection plate 700, and achieving efficient cooling.

[0066] In summary, the multifunctional high-frequency heating annealing furnace 10 of the present invention can meet the requirements of different cooling methods, while simplifying the operating steps and providing convenience for the operator.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multifunctional high frequency heating annealing furnace, characterized in that: include: A base, a furnace door compartment, a heating compartment, a top cover device, a loading platform and a lifting device, wherein the base is provided with a support frame, the furnace door compartment is installed on the base, the heating compartment is arranged on the furnace door compartment and connected to the base through the support frame, the top cover device is arranged on the top of the heating compartment, the loading platform is slidably arranged inside the furnace door compartment and the heating compartment, and the lifting device drives the loading platform to move; The furnace door bin comprises a furnace bin body and a furnace door, and the furnace bin body is provided with a gas interface and a pump interface; The heating chamber comprises: a heating chamber body, a fixing frame, a mixed spiral coil, and heat-insulating furnace bricks, wherein the fixing frame is mounted on the heating chamber body, the mixed spiral coil is sleeved on the periphery of the heating chamber body through the fixing frame, and the heat-insulating furnace bricks are mounted on the inner wall of the heating chamber body; the mixed spiral coil is a hollow structure, and a conductive wire tube and a cooling water pipe are arranged inside the mixed spiral coil; The stage is a columnar structure, and a plurality of holding protrusions are arranged on the outer wall of the stage, and the plurality of holding protrusions are distributed in a circular array with the center of the stage as the center; The clamping protrusion is provided with a positioning inclined surface and a guiding conical surface; The inner wall of the heat-insulating furnace brick is provided with a plurality of bosses distributed in a circular array, and an avoidance channel is formed between two adjacent bosses, and the avoidance channel is used to avoid the clamping protrusion, and each of the bosses is provided with a positioning inclined groove, and the positioning inclined groove cooperates with the positioning inclined surface of the clamping protrusion; A plurality of blocking nails are arranged on the inner wall of the heat-insulating furnace brick, the blocking nails are matched with the guide cone surface of the clamping protrusion, and the blocking nails are located above the boss.

2. The multifunctional high-frequency heating annealing furnace according to claim 1, characterized in that: The lifting device comprises: a nut-type turbine screw lifting module, a lifting plate, a lifting rod and a lifting seat; The nut-type turbine screw lifting module is arranged in the base, and the nut-type turbine screw lifting module drives the lifting plate to move. The lifting rod is arranged between the lifting plate and the lifting seat. The lifting seat is provided with a receiving groove, and the loading platform is placed in the receiving groove; the lifting plate drives the loading platform to perform lifting movement through the lifting seat.

3. The multifunctional high-frequency heating annealing furnace according to claim 2, characterized in that: A plurality of heat-insulating sheets are arranged on the outer wall of the supporting seat, and the plurality of heat-insulating sheets are arranged at intervals, and a gap exists between the edge of the heat-insulating sheet and the inner wall of the furnace bin body.

4. The multifunctional high-frequency heating annealing furnace according to claim 2, characterized in that: The nut-type turbine screw lifting module includes: an elevator, a screw and a guide column. The elevator is installed in the base. The elevator drives the screw to rotate. The screw and the lifting plate are driven and connected by a nut. The guide column is used to limit and guide the movement of the lifting plate.

5. The multifunctional high-frequency heating annealing furnace according to claim 1, characterized in that: The top cover device comprises: an end cover, a heat insulation component and a temperature monitoring component, wherein the end cover is arranged on the top of the heating chamber, and the end cover is connected to the support frame through a pressing plate; The thermal insulation component is located inside the heat storage body, and includes a connecting rod and a plurality of high-temperature partitions. The end of the connecting rod is arranged on the end cover and passes through a plurality of the high-temperature partitions. A gap is formed between two adjacent high-temperature partitions, and there is a gap between the high-temperature partition and the inner wall of the heat storage body.

6. The multifunctional high-frequency heating annealing furnace according to claim 5, characterized in that: The temperature monitoring component includes a thermocouple probe, which is installed on the end cover and has its end inserted into the heat chamber body.

7. The multifunctional high-frequency heating annealing furnace according to claim 5, characterized in that: The end cover is provided with an exhaust safety valve, and when the air pressure in the heating chamber exceeds a specified limit, the exhaust safety valve will be opened to achieve pressure relief and exhaust.

8. The multifunctional high-frequency heating annealing furnace according to claim 1, characterized in that: A connecting plate is provided between the heating chamber and the furnace door chamber, and between the furnace door chamber and the base. A water cooling channel is provided in the connecting plate, and a cooling interface connected to the water cooling channel is provided on the connecting plate.

9. The multifunctional high-frequency heating annealing furnace according to claim 1, characterized in that: A controller and a control panel are arranged on the base, and the control panel is electrically connected to the controller.

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