Sintering furnace with preheating function

Abstract

The invention relates to the field of heat treatment equipment, in particular to a sintering furnace with a preheating function, which comprises a sintering furnace body, a sealing cover, a holding furnace and the like, the sintering furnace body is connected with a sealing cover; a heat preservation furnace is installed on the sintering furnace body. Two different furnace bodies including the sintering furnace body and the heat preservation furnace are arranged, two temperature areas are divided, the sintering furnace body is kept in high-temperature operation all the time, the heat preservation furnace is used for preheating materials, preliminarily cooling the sintered materials and transferring the materials in the different temperature areas, and therefore uninterrupted continuous sintering treatment is achieved; the problem that in the prior art, a large amount of time is consumed due to the fact that a single sintering furnace body is directly heated and cooled is solved, the sintering efficiency is effectively improved, waste heat of the sintering furnace body is used for preheating materials, additional heating equipment is not needed, and therefore the heat energy utilization rate is increased, and the heat transfer speed is increased.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment, and more particularly to a sintering furnace with a preheating function. Background Technology

[0002] Existing sintering furnaces are divided into two types: intermittent and continuous. Intermittent sintering furnaces adopt a fully enclosed structure and can reach higher operating temperatures compared to continuous sintering furnaces. However, due to the limited space of the enclosed furnace cavity, existing intermittent sintering furnaces can only perform sintering in batches. Although they have higher operating temperatures, they also require longer heating and cooling times, resulting in a long sintering cycle for each batch of material. If the material is directly put into the high-temperature sintering furnace, it will crack due to the instantaneous increase in temperature causing a rapid change in internal stress. Therefore, each time the sintering furnace is used, it is necessary to gradually heat up the material to preheat it, making it difficult to meet the needs of large-scale, low-cost industrial continuous production. Summary of the Invention

[0003] In order to overcome the disadvantages of intermittent sintering furnaces, which require a lot of time for heating and cooling processes, resulting in long production cycles and limited capacity per furnace, this invention provides a sintering furnace with preheating function.

[0004] The technical solution is as follows: A sintering furnace with preheating function includes a sintering furnace body; it also includes a sealing cover, a holding furnace, a support platform, a material rack, a push-pull assembly, a moving assembly, and a feeding assembly; the sealing cover is connected to the sintering furnace body; several connecting strips are fixedly connected to the sealing cover in a ring; a sealing plate is fixedly connected to the end of all connecting strips away from the sealing cover; the connecting strips and the sealing plate are located inside the sintering furnace body; a limiting ring for limiting the position of the sealing plate is fixedly connected inside the sintering furnace body; a holding furnace is installed on the sintering furnace body; the holding furnace is located on the side of the sintering furnace body connected to the sealing cover; The inner diameter of the holding furnace is the same as the outer diameter of the sealing cover; a door panel is installed on the holding furnace; a moving component for controlling the opening and closing of the door panel is connected to the sintering furnace body; several cooling pipes are installed on the holding furnace; the connecting strips are hollow, and each cooling pipe passes through a connecting strip; the hollow connecting strips are connected to the interior of the sintering furnace body; a support platform is installed on the holding furnace; a material rack is installed inside the sintering furnace body; a placement rack for placing the material rack is installed on all connecting strips; a push-pull component for controlling the movement of the sealing cover is connected to the holding furnace; a feeding component for moving the material rack is connected to the support platform.

[0005] As a further preferred embodiment, the push-pull assembly includes: an electric push rod and a connecting rod; the electric push rod is installed at the bottom of the insulation furnace; the telescopic end of the electric push rod is fixedly connected to the connecting rod; the connecting rod passes through the insulation furnace and is fixedly connected to the sealing cover.

[0006] As a further preferred embodiment, the moving component includes: a guide rail 1 and an electric slider 1; two guide rails 1 are installed on the sintering furnace body; an electric slider 1 is slidably connected to each guide rail 1; all electric sliders 1 are fixedly connected to the door panel and drive the door panel to slide open and close.

[0007] As a further preferred embodiment, the feeding assembly includes: a support frame, support columns, an electro-hydraulic rod, wheels, and a drive assembly; the drive assembly is connected to the support platform; the drive assembly is connected to two support frames; two support columns are connected to the underside of each support frame; an electro-hydraulic rod for adjusting the distance is connected between the support frame and each support column; wheels are installed at the bottom of the support columns; a lifting edge is fixed to each side of the material rack; the support frame contacts the lifting edge.

[0008] As a further preferred embodiment, the drive assembly includes: a second guide rail, a second electric slider, and a slide rod; two second guide rails are mounted on the support platform; each second guide rail is slidably connected to a second electric slider; each second electric slider is fixedly connected to a slide rod; each slide rod is slidably connected to a support frame.

[0009] As a further preferred embodiment, it also includes a temperature control tube and an exchange tube; the temperature control tube is connected to the side of the sintering furnace body away from the sealing cover; the temperature control tube is connected to the interior of the sintering furnace body; the temperature control tube is connected to an exchange tube for exchanging heat; the exchange tube is connected to the interior of the heat preservation furnace.

[0010] As a further preferred embodiment, it also includes a rotating block, a motor, and a connecting rod; the rotating block is rotatably connected to the sealing plate; several connecting slots are opened inside the sealing plate; the connecting slots communicate with the space on the side of the sealing plate facing the sealing cover; several connecting ports are opened on the rotating block; the connecting ports communicate with the space on the side of the sealing plate away from the sealing cover; the connecting slots and connecting ports are adapted to each other; a motor is installed on the temperature control tube; a connecting rod is inserted into the temperature control tube; the connecting rod is inserted into the rotating block; the connecting rod is fixedly connected to the motor output shaft.

[0011] As a further preferred option, the insertion end of the connector is constricted.

[0012] As a further preferred solution, the door panel and the heat preservation furnace are connected by an embedded sliding connection.

[0013] As a further preferred option, the surfaces of the placement rack and support platform are roughened.

[0014] The present invention has the following advantages: By setting up two different furnace bodies, the sintering furnace body and the holding furnace, two temperature zones are defined. The sintering furnace body is always kept at a high temperature, while the holding furnace is used for preheating the material and initial cooling after sintering. The material is transferred between different temperature zones, thereby realizing uninterrupted continuous sintering processing. This avoids the problem of consuming a lot of time due to directly heating and cooling a single sintering furnace body in the prior art, effectively improving sintering efficiency. This design utilizes the waste heat of the sintering furnace body to preheat the material, eliminating the need for additional heating equipment, thereby improving the thermal energy utilization rate and accelerating the heat transfer speed. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram from the first perspective of the present invention;

[0016] Figure 2 This is a three-dimensional structural schematic diagram from a second perspective of the present invention;

[0017] Figure 3 This is a schematic diagram of the door panel in the open state of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the sintering furnace body and the holding furnace of the present invention;

[0019] Figure 5 This is a schematic diagram of the sealing cover of the present invention moving into the heat preservation furnace;

[0020] Figure 6 This is a schematic diagram of the internal structure of the sintering furnace body of the present invention;

[0021] Figure 7 This is a schematic diagram of the material rack moving into the heat preservation furnace according to the present invention;

[0022] Figure 8 This is a schematic diagram of the material rack of the present invention moving onto the support platform;

[0023] Figure 9 This is a three-dimensional structural diagram of the support frame, support column, and electro-hydraulic rod of the present invention;

[0024] Figure 10 This is an exploded view of the sealing plate, rotating block and temperature control tube of the present invention, with the sealing plate and temperature control tube shown in cross-section.

[0025] The components are: 1-Sintering furnace body, 101-Limiting ring, 2-Sealing cover, 201-Connecting strip, 202-Sealing plate, 203-Placement rack, 204-Connecting groove, 205-Rotating block, 206-Connecting port, 3-Heating furnace, 301-Door panel, 302-Cooling pipe, 4-Support platform, 401-Support frame, 402-Support column, 403-Electric hydraulic rod, 404-Walking wheel, 5-Material rack, 501-Lifting edge, 6-Temperature control pipe, 7-Exchange pipe, 21-Electric push rod, 22-Connecting rod, 31-Guide rail one, 32-Electric slider one, 41-Guide rail two, 42-Electric slider two, 43-Slide rod, 61-Motor, 62-Plug-in rod. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0027] Example 1: As Figures 1-10 As shown, a sintering furnace with preheating function includes a sintering furnace body 1;

[0028] It also includes a closed cover 2, a holding furnace 3, a support platform 4, a material rack 5, a push-pull assembly, a moving assembly, and a feeding assembly; the closed cover 2 is connected to one side of the sintering furnace body 1; four connecting strips 201 are fixedly connected to the closed cover 2 in a ring; a sealing plate 202 is fixedly connected to the end of all connecting strips 201 away from the closed cover 2; the connecting strips 201 and the sealing plate 202 are located inside the sintering furnace body 1; a limit ring 101 is fixedly connected inside the sintering furnace body 1; a holding furnace 3 is installed on the sintering furnace body 1; the holding furnace 3 is located on the side of the sintering furnace body 1 connected to the closed cover 2; the inner diameter of the holding furnace 3 is the same as the outer diameter of the closed cover 2; the front side of the holding furnace 3... A door panel 301 is installed; a moving component is connected to the sintering furnace body 1; four cooling pipes 302 are installed on the holding furnace 3; all cooling pipes 302 are connected to an external air cooler; the connecting strip 201 is hollow, and each cooling pipe 302 passes through a connecting strip 201; the hollow connecting strip 201 communicates with the interior of the sintering furnace body 1; a support platform 4 is installed on the holding furnace 3; a material rack 5 is provided inside the sintering furnace body 1; a placement rack 203 is installed on all connecting strips 201; a push-pull component is connected to the holding furnace 3; the push-pull component is connected to the sealing cover 2 and drives the sealing cover 2 to move; a feeding component is connected to the support platform 4.

[0029] The push-pull assembly includes an electric push rod 21 and a connecting rod 22; the electric push rod 21 is installed at the bottom of the heat preservation furnace 3; the connecting rod 22 is fixedly connected to the telescopic end of the electric push rod 21; the connecting rod 22 passes through the heat preservation furnace 3 and is fixedly connected to the sealing cover 2; the electric push rod 21 drives the connecting rod 22 to move the sealing cover 2.

[0030] The moving components include: guide rail 31 and electric slider 32; two guide rails 31 are installed on the sintering furnace body 1; each guide rail 31 is slidably connected to an electric slider 32; all electric sliders 32 are fixedly connected to the door panel 301 and drive the door panel 301 to slide open and close.

[0031] The feeding assembly includes: a support frame 401, a support column 402, an electro-hydraulic rod 403, a traveling wheel 404, and a drive assembly; the drive assembly is connected to the support platform 4; the drive assembly is connected to two support frames 401; two support columns 402 are connected to the lower side of each support frame 401; an electro-hydraulic rod 403 is connected between the support frame 401 and each support column 402; a traveling wheel 404 is installed at the bottom of the support column 402; a lifting edge 501 is fixed to each side of the material rack 5; the support frame 401 contacts the lifting edge 501 and moves the material rack 5 by lifting it through the lifting edge 501.

[0032] The drive assembly includes: a second guide rail 41, a second electric slider 42, and a slide rod 43; two second guide rails 41 are installed on the support platform 4; each second guide rail 41 is slidably connected to an electric slider 42; each electric slider 42 is fixedly connected to a slide rod 43; each slide rod 43 is slidably connected to a support frame 401 in the vertical direction and drives the support frame 401 to move horizontally.

[0033] It also includes a temperature control pipe 6 and an exchange pipe 7; the temperature control pipe 6 is connected to the side of the sintering furnace body 1 away from the sealing cover 2; the temperature control pipe 6 is connected to the interior of the sintering furnace body 1; the temperature control pipe 6 is connected to the exchange pipe 7; the exchange pipe 7 is connected to the interior of the heat preservation furnace 3.

[0034] It also includes a rotating block 205, a motor 61, and a connecting rod 62; the rotating block 205 is rotatably connected to the sealing plate 202; eight connecting slots 204 are opened inside the sealing plate 202; the connecting slots 204 are connected to the space of the sealing plate 202 facing the sealing cover 2; eight connecting ports 206 are opened on the rotating block 205; the connecting ports 206 are connected to the space of the sealing plate 202 away from the sealing cover 2; the connecting slots 204 and the connecting ports 206 are adapted to each other; the motor 61 is installed on the temperature control tube 6; the connecting rod 62 is inserted into the temperature control tube 6; the connecting rod 62 is inserted into the rotating block 205; the connecting rod 62 is fixedly connected to the output shaft of the motor 61, the motor 61 drives the connecting rod 62 to rotate, the connecting rod 62 drives the rotating block 205 to rotate, so that the connecting ports 206 are aligned and connected with the connecting slots 204, thereby connecting the spaces on both sides of the sealing plate 202.

[0035] The insertion end of the plug rod 62 is constricted to facilitate insertion with the rotating block 205.

[0036] The door panel 301 and the heat preservation furnace 3 are connected by an embedded sliding connection to improve sealing and heat preservation effect.

[0037] The surfaces of the placement rack 203 and the support platform 4 are roughened to improve the stability of the material support rack 5.

[0038] The steps for using this invention are as follows:

[0039] First, start the sintering furnace body 1 to raise its internal temperature to the specified sintering temperature of the material. Then, control the electric push rod 21 to extend, driving the connecting rod 22 to pull the sealing cover 2 into the holding furnace 3. Figure 3 As shown, during the process, the sealing cover 2 releases the seal on the sintering furnace body 1, and the hot air inside the sintering furnace body 1 enters the holding furnace 3. When the sealing cover 2 moves the connecting strip 201 and the sealing plate 202, the sealing plate 202 is stopped by the limiting ring 101, and the sealing plate 202 and the limiting ring 101 form a seal, sealing the inside of the sintering furnace body 1 and isolating it from the inside of the holding furnace 3. At this time, the inside of the holding furnace 3 has a certain temperature. Then, the worker loads the material: In the initial state, the material rack 5 is located on the support platform 4. After the worker places the material on the material rack 5, he first controls the electric slider 32 to slide along the guide rail 31, driving the door panel 301 to open. Then, he controls the electric slider 42 to drive the slide rod 43 to slide along the guide rail 41. The slide rod 43 pushes the support frame 401 from the opened door panel 301 into the holding furnace 3. During this process, the electric hydraulic rod 403... When extended, the support frame 401 rises and contacts the lifting edge 501, thereby lifting the material rack 5 and moving it into the holding furnace 3. The support frame 401 moves on the support platform 4 via the traveling wheels 404 at the bottom of the support column 402, forming support. When the support column 402 enters the holding furnace 3, its traveling wheels 404 roll on the placement rack 203, providing support. When the support frame 401 moves the material rack 5 to the placement rack 203, the electric hydraulic rod 403 is retracted, and the support frame 401 moves down, placing the material rack 5 on the placement rack 203. Then, the electric slider 42 is controlled to move the support frame 401 back to the support platform 4 for resetting and exiting the holding furnace 3. Finally, the door panel 301 is controlled to reset and close. At this time, the material rack 5 enters the heated holding furnace 3 to preheat the material on the material rack 5.

[0040] Then, the electric push rod 21 is retracted, and the connecting rod 22 pushes the sealing cover 2 towards the sintering furnace body 1, and drives the material rack 5 on the placement rack 203 into the sintering furnace body 1. After the sealing cover 2 closes the sintering furnace body 1, the sintering furnace body 1 continues to work, performing high-temperature sintering treatment on the material. When the material is sintered, the sealing cover 2 is opened, driving the material rack 5 to move into the holding furnace 3. During this process, the heat in the sintering furnace body 1 is discharged into the holding furnace 3 again, transferring the material from the high-temperature sintering furnace body 1 to the lower-temperature holding furnace 3 to achieve transitional cooling. After the sealing plate 202 abuts against the limiting ring 101, it seals the sintering furnace body 1, and the sintering furnace body 1 continues to operate, keeping its internal temperature constant. Then, the door panel is controlled to open. 301 is opened, and outside air enters the holding furnace 3. The internal temperature of the holding furnace 3 gradually decreases, and the material gradually cools down. Then, the electric slider 42 is controlled to drive the support frame 401 into the holding furnace 3 through the slide rod 43. When the support frame 401 is below the lifting edge 501, the electric hydraulic rod 403 is controlled to extend and lift the support frame 401. The support frame 401 moves upward relative to the slide rod 43 and contacts the lifting edge 501, lifting the material rack 5 and separating it from the placement rack 203. Then, the electric slider 42 is controlled to move the support frame 401 and the material rack 5 from the holding furnace 3 to the support platform 4. After the material cools down, the worker removes the sintered material from the material rack 5 and places the next batch of material to be sintered. Then, the above operation process is repeated.

[0041] Furthermore, when it is necessary to rapidly cool down the sintered material, after the material is moved into the holding furnace 3 after sintering, the cold air fan connected to the cooling pipe 302 is started to send cold air into the cooling pipe 302. The cold air enters the connecting strip 201 through the cooling pipe 302 inserted inside the hollow connecting strip 201, and finally blows from the connecting strip 201 onto the material rack 5 and the material located in the holding furnace 3 to rapidly cool the material. Then the material rack 5 is moved out onto the support platform 4 for unloading.

[0042] When the sintering temperature required for the next batch of materials is lower than that of the previous batch, the interior of the sintering furnace body 1 needs to be rapidly cooled. At this time, the sintering furnace body 1 stops heating, and the material rack 5 for loading the next batch of materials is located on the support platform 4. First, the closing cover 2 is moved to re-close the sintering furnace body 1, and the connecting strip 201 is pushed to fully enter the interior of the sintering furnace body 1. The connecting strip 201 and the cooling pipe 302 slide relative to each other, but the cooling pipe 302 is still connected to the interior space of the sintering furnace body 1 through the hollow channel of the connecting strip 201. Maintain the connection, then start the cold air blower to introduce cold air into the connecting strip 201 through the cooling pipe 302, and then into the sintering furnace body 1 to rapidly cool the interior of the sintering furnace body 1 to reach the required sintering temperature. Then, control the sealing cover 2 to move the connecting strip 201 back into the heat preservation furnace 3, transfer the material rack 5 into the heat preservation furnace 3 and place it on the placement rack 203 on the connecting strip 201. Then, the placement rack 203 will drive the material rack 5 and the material into the sintering furnace body 1 for sintering.

[0043] Furthermore, to prevent the heat from the sintering furnace body 1 from entering the holding furnace 3 and remaining only at the connection between the sintering furnace body 1 and the holding furnace 3, making it difficult to diffuse throughout the holding furnace 3 and causing uneven temperature distribution inside the holding furnace 3, thus affecting the preheating effect, after the sealing cover 2 moves into the holding furnace 3, it is controlled to move back towards the sintering furnace body 1, pushing the sealing plate 202 back into the sintering furnace body 1. The sealing plate 202 pushes the hot air in the sintering furnace body 1 towards the temperature control pipe 6. After entering the temperature control pipe 6, the hot air is guided into the holding furnace 3 through the exchange pipe 7, so that the hot air is evenly distributed inside the holding furnace 3, ensuring the preheating effect.

[0044] Furthermore, to reduce the internal temperature of the sintering furnace body 1 for sintering batches of materials, after the previous batch of materials has been sintered, the motor 61 is first controlled to drive the plug rod 62 to rotate. The plug rod 62 drives the rotating block 205 to rotate, so that the connecting port 206 on the rotating block 205 connects with the connecting groove 204, thereby connecting the spaces on both sides of the sealing plate 202. Then, the sealing cover 2 moves the connecting strip 201 and the material rack 5 into the holding furnace 3. When the cooling pipe 302 blows cold air into the holding furnace 3 through the connecting strip 201 to cool the materials, the holding furnace 3... The cold air inside the holding furnace 3 can enter from the inlet of the connecting groove 204 on one side of the sealing plate 202, and then flow to the sintering furnace body 1 on the other side of the sealing plate 202 through the connecting port 206 connected to the connecting groove 204. In this way, while cooling the material inside the holding furnace 3, the sintering furnace body 1 is also pre-cooled to a certain extent. After that, when the sealing cover 2 drives the connecting strip 201 back to the sintering furnace body 1, the cold air can be directly blown into the furnace through the connecting strip 201 to achieve a significant cooling effect, thereby accelerating the cooling speed of the sintering furnace body 1 and improving the overall production efficiency.

[0045] Based on the above steps, we can see that the present invention has the following effects:

[0046] The sintering furnace body 1 and the holding furnace 3 are two different furnace bodies, which divide the furnace into two temperature zones. The sintering furnace body 1 is always kept at a high temperature, while the holding furnace 3 is used for preheating the material and initial cooling after sintering. The material is transferred between different temperature zones to achieve uninterrupted continuous sintering. This avoids the problem of the time required for directly controlling the heating and cooling of the sintering furnace body 1 in the existing technology, which effectively improves the sintering efficiency. In addition, the holding furnace 3 uses the residual heat of the sintering furnace body 1 to preheat the material, eliminating the need for additional heating equipment, resulting in high thermal energy utilization and fast heat transfer.

[0047] The technical principles of the embodiments of the present invention have been described above with reference to specific examples. These descriptions are merely for explaining the principles of the embodiments of the present invention and should not be construed as limiting the scope of protection of the embodiments of the present invention in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the embodiments of the present invention.

Claims

1. A sintering furnace with a preheating function, comprising a sintering furnace body (1); characterized in that: It also includes a closed cover (2), a heat preservation furnace (3), a support platform (4), a material rack (5), a push-pull assembly, a moving assembly, and a feeding assembly; the closed cover (2) is connected to the sintering furnace body (1); several connecting strips (201) are fixedly connected to the closed cover (2) in a ring; a sealing plate (202) is fixedly connected to the end of all connecting strips (201) away from the closed cover (2); the connecting strips (201) and the sealing plate (202) are located inside the sintering furnace body (1); a limiting ring (101) for limiting the position of the sealing plate (202) is fixedly connected inside the sintering furnace body (1); a heat preservation furnace (3) is installed on the sintering furnace body (1); the heat preservation furnace (3) is located on the side of the sintering furnace body (1) connected to the closed cover (2); the inner diameter of the heat preservation furnace (3) is the same as the outer diameter of the closed cover (2); A door panel (301) is installed on the heat preservation furnace (3); a moving component for controlling the opening and closing of the door panel (301) is connected to the sintering furnace body (1); several cooling pipes (302) are installed on the heat preservation furnace (3); the connecting strip (201) is hollow, and each cooling pipe (302) is inserted into a connecting strip (201); the hollow connecting strip (201) is connected to the interior of the sintering furnace body (1); a support platform (4) is installed on the heat preservation furnace (3); a material rack (5) is set inside the sintering furnace body (1); a placement rack (203) for placing the material rack (5) is installed on all the connecting strips (201); a push-pull component for controlling the movement of the closing cover (2) is connected to the heat preservation furnace (3); a feeding component for moving the material rack (5) is connected to the support platform (4).

2. A sintering furnace with preheating function according to claim 1, characterized in that: The push-pull assembly includes: an electric push rod (21) and a connecting rod (22); the electric push rod (21) is installed at the bottom of the heat preservation furnace (3); the connecting rod (22) is fixedly connected to the telescopic end of the electric push rod (21); the connecting rod (22) passes through the heat preservation furnace (3) and is fixedly connected to the sealing cover (2).

3. A sintering furnace with preheating function according to claim 1, characterized in that: The moving components include: a guide rail (31) and an electric slider (32); two guide rails (31) are installed on the sintering furnace body (1); an electric slider (32) is slidably connected to each guide rail (31); all electric sliders (32) are fixedly connected to the door panel (301) and drive the door panel (301) to slide open and close.

4. A sintering furnace with preheating function according to claim 1, characterized in that: The feeding assembly includes: a support frame (401), a support column (402), an electro-hydraulic rod (403), a traveling wheel (404), and a drive assembly; the drive assembly is connected to the support platform (4); the drive assembly is connected to two support frames (401); two support columns (402) are connected to the lower side of each support frame (401); an electro-hydraulic rod (403) for adjusting the distance is connected between the support frame (401) and each support column (402); a traveling wheel (404) is installed at the bottom of the support column (402); a lifting edge (501) is fixed to each side of the material rack (5); the upper surface of the support frame (401) contacts the lower surface of the lifting edge (501) and is used to support the material rack (5).

5. A sintering furnace with preheating function according to claim 4, characterized in that: The drive assembly includes: a second guide rail (41), a second electric slider (42), and a slide rod (43); two second guide rails (41) are mounted on the support platform (4); each second guide rail (41) is slidably connected to a second electric slider (42); each second electric slider (42) is fixedly connected to a slide rod (43); each slide rod (43) is slidably connected to a support frame (401).

6. A sintering furnace with preheating function according to claim 5, characterized in that: It also includes a temperature control tube (6) and an exchange tube (7); the temperature control tube (6) is connected to the side of the sintering furnace body (1) away from the sealing cover (2); the temperature control tube (6) is connected to the inside of the sintering furnace body (1); the temperature control tube (6) is connected to an exchange tube (7) for exchanging heat; the exchange tube (7) is connected to the inside of the heat preservation furnace (3).

7. A sintering furnace with preheating function according to claim 6, characterized in that: It also includes a rotating block (205), a motor (61), and a plug rod (62); the rotating block (205) is rotatably connected to the sealing plate (202); several connecting slots (204) are opened inside the sealing plate (202); the connecting slots (204) are connected to the space of the sealing plate (202) facing the sealing cover (2); several connecting ports (206) are opened on the rotating block (205); the connecting ports (206) are connected to the space of the sealing plate (202) away from the sealing cover (2); the connecting slots (204) and the connecting ports (206) are adapted to each other; the motor (61) is installed on the temperature control tube (6); the plug rod (62) is inserted inside the temperature control tube (6); the plug rod (62) is plugged into the rotating block (205); the plug rod (62) is fixedly connected to the output shaft of the motor (61).

8. A sintering furnace with preheating function according to claim 7, characterized in that: The insertion end of the plug rod (62) is constricted.

9. A sintering furnace with preheating function according to claim 3, characterized in that: The door panel (301) and the heat preservation furnace (3) are connected by an embedded sliding connection.

10. A sintering furnace with preheating function according to claim 9, characterized in that: The surfaces of the placement rack (203) and the support platform (4) are roughened.

Images