High-temperature box type sintering furnace with rapid cooling function

Abstract

The invention relates to the technical field of high-temperature box-type sintering furnaces, in particular to a high-temperature box-type sintering furnace with a rapid cooling function, which comprises a box-type sintering furnace body, the box-type sintering furnace body comprises a furnace box, a hearth is mounted in the furnace box, and a C-shaped flowing cavity is formed between the furnace box and the hearth; an outer sealing plate is inserted into the front face of the furnace box and the front face of the hearth flowing cavity through bolts, and a door plate set is movably installed on the front face of the furnace box. The flowing cavity is formed between the furnace box and the hearth, the exhaust hood pipe is arranged at the top end of the flowing cavity, the airflow air pipe is arranged at the bottom end of the flowing cavity, and the bottom end of the airflow air pipe is in butt joint with the air blower, so that when the interior of the hearth is naturally cooled, the air blower is started to suck external cold air, and the airflow air pipe blows air; hot air mass in the flowing cavity between the hearth and the furnace box is pushed through the two branch pipes of the airflow air pipe, so that hot air is blown out through the exhaust hood pipe, flowing of airflow in the flowing cavity is controlled, and the cooling effect in the hearth is accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature box-type sintering furnaces, and in particular to a high-temperature box-type sintering furnace with a rapid cooling function. Background Art

[0002] The high-temperature box-type sintering furnace is an important equipment for the sintering treatment of lithium battery materials. It includes a furnace body, heating elements, a flame curtain tube, a nitrogen inlet pipe and a hydrogen inlet pipe. Before use, nitrogen is introduced into the furnace to expel the air therein, and then hydrogen is introduced into the furnace as a reducing agent for the sintering treatment of the materials. Since the heating elements are embedded in the furnace body, air will still enter the furnace along the heating elements, affecting the winding of the materials. Therefore, a muffle tank is generally set in the furnace, and the heating elements heat the muffle tank outside the muffle tank. The high-temperature box-type sintering furnace realizes the sintering process of materials in a high-temperature environment by electric heating or gas heating, combined with precise temperature control and atmosphere control system. The airtight performance of the furnace body and good insulation materials ensure the uniformity and stability of the temperature, thereby ensuring the sintering quality and efficiency.

[0003] However, after the material is sintered, it is still difficult to cool the material. If the furnace door is opened directly when the material is at high temperature, the outside air will come into contact with the high-temperature material, and the material will still be oxidized, affecting the sintering quality of the material. Therefore, it is necessary to open the furnace door and take out the material after the material is cooled. The current method of cooling the material temperature is to cool it with the furnace, that is, after the material is sintered, the heating element stops heating and keeps the furnace door in a closed state, so that the sintering furnace and the material naturally cool down. In this cooling method, the material temperature drops slowly, making the sintering efficiency of the material low. Therefore, a high-temperature box-type sintering furnace with rapid cooling function is needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-temperature box-type sintering furnace with a rapid cooling function comprises a box-type sintering furnace body, the box-type sintering furnace body comprises a furnace box, a furnace chamber is installed inside the furnace box, a C-shaped flow cavity is opened between the furnace box and the furnace chamber, an outer sealing plate is installed on the front of the furnace box and the furnace chamber flow cavity by bolt insertion, a door panel group is movably installed on the front of the furnace box, liquid cooling accessories are provided on the inner walls of the furnace box and the furnace chamber flow cavity, and air cooling accessories are provided on the bottom end of the furnace box. The C-shaped flow cavity between the furnace box and the furnace chamber can conduct and insulate the temperature in the furnace chamber. When the temperature in the flow cavity is discharged, the air mass flowing in the furnace chamber can be discharged through the conduction of the furnace chamber, thereby reducing the heat conduction cooling operation under the condition of keeping the furnace chamber sealed, and improving the cooling rate in the furnace chamber.

[0007] Preferably, the door panel group includes a sealing door movably installed on the right side of the front side of the furnace box, a push-pull handle is installed on the outside of the sealing door, and the sealing door buckle is installed on the outside of the furnace chamber and the outer sealing plate. The sealing door is rotated and buckled to the outside of the furnace box, so that the sealing door fits against the surface of the furnace chamber to ensure the sealing of the inside of the furnace chamber.

[0008] Preferably, the sealing door is provided with slots at both upper and lower ends, and movable blocks are movably installed at both upper and lower ends of the front side of the furnace box through guide grooves, and a threaded shaft is connected to the front side of the movable block, the threaded shaft is inserted in the slot of the sealing door, and a threaded screw cap is installed on the threaded sleeve on the outer side of the threaded shaft. The movement of the movable block can be guided by the guide groove of the furnace box, and then the clamping state of the threaded shaft and the sealing door slot can be controlled. When the position of the threaded shaft is adjusted, a threaded screw cap can be threadedly sleeved on the outer side of the threaded shaft, so that the threaded screw cap is buckled on the outside of the sealing door, thereby ensuring the stability of the sealing door installed on the outside of the furnace.

[0009] Preferably, the air cooling accessories include an air flow duct connected to and passing through the flow cavity between the furnace box and the furnace, the bottom end of the air flow duct is connected to a blower, the bottom end of the air flow duct passes through the interior of the furnace box and is installed with the blower, a first sealing valve is installed on the surface of the air flow duct, an exhaust hood pipe is provided at the top of the furnace box, and a second sealing valve is installed on the outside of the exhaust hood pipe, when the blower is started, the air flow is pushed by the blower to flow, so that the air flow passes through the air flow duct into the flow cavity in the furnace box, and the hot air mass in the flow cavity is pushed out of the exhaust hood pipe and discharged, thereby improving the heat dissipation effect in the sealed environment in the furnace.

[0010] Preferably, the airflow duct is designed in a Y-shaped structure, and the branch pipe ends at the top of the airflow duct are connected and penetrated with both sides of the flow cavity in the furnace box. Through the Y-shaped structure design of the airflow duct, the airflow can be conveniently guided, so that the airflow can be diverted during the blowing operation, and the airflow can be controlled to be pushed and moved synchronously from both sides of the flow cavity in the furnace box, thereby accelerating the flow effect of the hot air mass in the flow cavity in the furnace box.

[0011] Preferably, the exhaust hood pipe is funnel-shaped, and flared groove structures are provided on both sides of the top of the exhaust hood pipe. The bottom end of the exhaust hood pipe is connected to and penetrates the flow cavity inside the furnace box. A fence debris hood is threadedly mounted on the air inlet end of the blower. The flared groove design on the top of the exhaust hood pipe can guide the airflow so that the airflow can be discharged after expansion and guidance. The fence debris hood is threadedly mounted on the air inlet end of the blower, which can facilitate the installation of the fence debris hood.

[0012] Preferably, a support plate end is provided at the bottom leg end of the box-type sintering furnace body, and the liquid cooling accessories include a water tank installed on the surface of the support plate end, a water pump is connected to the left side of the water tank, and a main water pipe is connected to the top of the water pump, and three coil return pipes are connected to the top of the main water pipe in sequence, and the bottom end of the last coil return pipe is connected to a return pipe, and the end of the return pipe is connected to a condenser assembly, the condenser assembly is installed on the side of the water tank, and the pipe end of the condenser assembly is connected and penetrated with the water tank, and the cooling water in the water tank is pumped out by the water pump, so that the cooling water enters the coil return pipe through the main water pipe, and moves through the return pipe after flowing inside the coil return pipe, so that the heated water after heat conduction enters the condenser assembly for re-cooling, and the cooled water returns to the water tank for circulation operation, and the cooling water can accelerate the cooling operation of the furnace surface while flowing in the coil return pipe, so that the cold air can exchange heat with the inner wall of the furnace.

[0013] Preferably, the coiled return pipe is composed of multiple annular pipe ends, and the annular pipe ends are connected through branch pipe ends. The coiled return pipe is sequentially affixed to the three side end faces of the furnace. By directly affixing the coiled return pipe to the outside of the furnace, the conduction heat exchange effect between the coiled return pipe and the furnace can be improved, and the heat dissipation efficiency in the sealed environment inside the furnace can be further improved.

[0014] Preferably, a filling port tube is installed at the top right side of the water tank. The filling port tube is designed with a bent structure. The top threaded cover of the filling port tube is provided with a sealing cap. The bent filling port tube design at the top right side of the water tank can reasonably utilize the space between the furnace box and the support plate end, ensure the maximum water filling capacity of the water tank, and avoid the inconvenience of water filling when the water filling port is located at the top.

[0015] The present invention has at least the following beneficial effects:

[0016] 1. By setting a box-type sintering furnace body and air-cooling accessories, indirect heat exhaust operation inside the furnace is realized. Compared with the traditional structure, this device sets a flow cavity between the furnace box and the furnace, sets an exhaust hood pipe at the top of the flow cavity, sets an airflow duct at the bottom of the flow cavity, and connects with the blower through the bottom of the airflow duct. When the furnace is naturally cooled, the blower is started to inhale the outside cold air, so that the airflow duct is blown, and the hot air mass in the flow cavity between the furnace and the furnace box is pushed through the two branch pipes of the airflow duct, so that the hot air is blown out through the exhaust hood pipe, thereby controlling the airflow in the flow cavity, thereby accelerating the cooling effect in the furnace.

[0017] 2. By setting up liquid cooling accessories, the heat dissipation efficiency in the furnace is further improved. This device uses a water pump to pump cooling water out of the water tank, so that the cooling water enters the three coil return pipes in turn through the main water pipe for circulation. The design of the coil return pipe extends the cooling water flow path, thereby improving the heat exchange effect on the furnace wall tube temperature and further improving the cooling rate in the furnace.

[0018] 3. By setting up a door panel group, regular maintenance of the coil return pipe in the flow cavity between the furnace box and the furnace can be achieved. This device is installed on the outside of the flow cavity through the front cover of the flow cavity between the furnace box and the furnace. After the temperature in the furnace is lowered and the material is taken out, the bolts on both sides of the outer sealing plate can be taken out, and then the outer sealing plate can be removed, which is convenient for maintenance operations on the coil return pipe in the flow cavity between the furnace and the furnace box, ensuring the normal heat dissipation effect of the furnace in daily use.

[0019] 4. Through the Y-shaped structural design of the air flow duct, the air flow during the blower blowing can be diverted, so that the two air flows are blown from both sides of the flow cavity between the furnace box and the furnace, thereby improving the air flow passing effect and making the air flow ejected from the top of the exhaust hood pipe, which can ensure the flow rate of the air flow and the heat dissipation effect in the flow cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the external structure of a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional disassembled structure of a door panel assembly in a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention;

[0023] Figure 3 This is a three-dimensional right-view structural schematic diagram of a door panel assembly in a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional disassembled structure of a box-type sintering furnace body in a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention;

[0025] Figure 5 This is a three-dimensional disassembled structural schematic diagram of an air-cooling accessory in a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the partial disassembly structure of an air-cooling accessory in a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of a liquid cooling accessory in a high-temperature box-type sintering furnace with a rapid cooling function proposed by the present invention.

[0028] In the figure: 1. box-type sintering furnace body; 11. furnace box; 12. furnace chamber; 13. outer sealing plate; 2. door panel assembly; 21. sealing door; 22. push-pull handle; 23. movable block; 24. threaded shaft; 25. threaded screw cap; 3. air cooling accessories; 31. air flow duct; 32. blower; 33. first sealing valve; 34. exhaust hood pipe; 35. second sealing valve; 36. fence debris cover; 4. liquid cooling accessories; 41. water tank; 42. water pump; 43. main water pipe; 44. coil return pipe; 45. reflux pipe; 46. condenser assembly; 47. filling port pipe; 48. sealing cap. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Reference Figure 1-7 A high-temperature box-type sintering furnace with a rapid cooling function comprises a box-type sintering furnace body 1, the box-type sintering furnace body 1 comprises a furnace box 11, a furnace chamber 12 is installed inside the furnace box 11, a C-shaped flow cavity is opened between the furnace box 11 and the furnace chamber 12, an outer sealing plate 13 is installed on the front of the flow cavity of the furnace box 11 and the furnace chamber 12 by bolt insertion, a door panel group 2 is movably installed on the front of the furnace box 11, liquid cooling accessories 4 are arranged on the inner walls of the flow cavity of the furnace box 11 and the furnace chamber 12, and an air cooling accessory 3 is arranged at the bottom of the furnace box 11.

[0031] The door panel assembly 2 includes a sealing door 21 movably mounted on the right side of the front face of the furnace box 11 , a push-pull handle 22 is mounted on the outer side of the sealing door 21 , and the sealing door 21 is buckled on the outer side of the furnace chamber 12 and the outer sealing plate 13 .

[0032] The sealing door 21 is provided with a card slot at both ends, and a movable block 23 is movably installed at both ends of the front of the furnace box 11 through the guide groove, and a threaded shaft 24 is connected to the front of the movable block 23. The threaded shaft 24 is inserted into the card slot of the sealing door 21, and a threaded screw cap 25 is installed on the outer threaded sleeve of the threaded shaft 24.

[0033] The air-cooling accessory 3 includes an air flow duct 31 connected to and passing through the flow cavity between the furnace box 11 and the furnace 12. A blower 32 is connected to the bottom end of the air flow duct 31. The blower 32 is installed after the bottom end of the air flow duct 31 passes through the interior of the furnace box 11. A first sealing valve 33 is installed on the surface of the air flow duct 31. An exhaust hood pipe 34 is provided at the top of the furnace box 11, and a second sealing valve 35 is installed on the outside of the exhaust hood pipe 34.

[0034] The airflow duct 31 is designed in a Y-shaped structure, and the branch pipe end at the top of the airflow duct 31 is connected and connected with the two sides of the flow cavity in the furnace box 11.

[0035] The exhaust hood pipe 34 is designed in a funnel shape, and expansion groove structures are opened on both sides of the top of the exhaust hood pipe 34. The bottom end of the exhaust hood pipe 34 is connected and penetrated with the internal flow cavity of the furnace box 11, and a fence debris cover 36 is threadedly installed on the air inlet end of the blower 32.

[0036] A support plate end is provided at the bottom leg end of the box-type sintering furnace body 1, and the liquid cooling accessory 4 includes a water tank 41 installed on the surface of the support plate end. A water pump 42 is connected to the left side of the water tank 41, and a main water pipe 43 is connected to the top of the water pump 42. Three coil return pipes 44 are connected to the top of the main water pipe 43 in sequence, and a return pipe 45 is connected to the bottom of the last coil return pipe 44, and a condenser assembly 46 is connected to the end of the return pipe 45. The condenser assembly 46 is installed on the side of the water tank 41, and the pipe end of the condenser assembly 46 is connected to the water tank 41.

[0037] The coiled return pipe 44 is composed of a plurality of annular pipe ends, and the annular pipe ends are connected through branch pipe ends. The coiled return pipe 44 is sequentially attached to the three side end surfaces of the furnace 12 .

[0038] A filling port tube 47 is installed at the top right side of the water tank 41 . The filling port tube 47 is designed to be a bent structure, and a sealing cap 48 is threadedly buckled on the top of the filling port tube 47 .

[0039] The C-shaped flow cavity between the furnace box 11 and the furnace 12 can conduct and insulate the temperature in the furnace 12. When the temperature in the flow cavity is discharged, the air mass flowing in the furnace 12 can be discharged through the conduction of the furnace 12, thereby reducing the heat conduction cooling operation while keeping the furnace 12 sealed, increasing the cooling rate in the furnace 12, and reducing the time required for natural cooling of the temperature in the furnace 12. When the coil return pipe 44 needs to be inspected, the sealing door 21 can be opened to remove the bolts at both ends of the outer sealing plate 13, and then the outer sealing plate 13 can be conveniently pulled out, and the condition of the coil return pipe 44 on the inner wall of the flow cavity in the furnace box 11 can be inspected. The sealing door 21 is rotated and buckled on the outside of the furnace box 11, so that the sealing door 21 fits on the surface of the furnace 12 to ensure the sealing inside the furnace 12. The staff can hold the push-pull handle 22 to facilitate the push-pull rotation of the sealing door 21.

[0040] The movement of the movable block 23 can be guided by the guide groove of the furnace box 11, and then the clamping state of the threaded shaft 24 and the clamping groove of the sealing door 21 can be controlled. When the position of the threaded shaft 24 is adjusted, a threaded screw cap 25 can be threadedly sleeved on the outer side of the threaded shaft 24, so that the threaded screw cap 25 is buckled on the outer side of the sealing door 21 to ensure the stability of the sealing door 21 installed on the outer side of the furnace chamber 12. A circular groove is opened on the outer side of the clamping groove of the sealing door 21. During the installation of the threaded screw cap 25, the threaded screw cap 25 can be embedded in the circular groove of the sealing door 21 to ensure the stability of the sealing door 21 buckled on the outer side of the furnace box 11. When sealing and heat dissipation are performed in the furnace chamber 12, the blower 32 can be started, and the blower 32 pushes the air flow during the blowing, so that the air flow passes through the air flow duct 31 and enters the flow cavity in the furnace box 11, so that the hot air mass in the flow cavity is pushed out of the exhaust hood pipe 34 and then discharged, thereby improving the heat dissipation effect in the sealed environment in the furnace chamber 12.

[0041] The Y-shaped structural design of the airflow duct 31 can conveniently guide the airflow, make the airflow divert during the blast, control the airflow to be pushed and moved synchronously from both sides of the flow cavity in the furnace box 11, thereby accelerating the flow effect of the hot air mass in the flow cavity in the furnace box 11, and making the airflow be quickly discharged through the exhaust hood pipe 34. A second sealing valve 35 is installed at the pipe end of the exhaust hood pipe 34, which can close the flow cavity in the furnace box 11 and ensure the sintering temperature of the material in the furnace chamber 12. The expansion groove design at the top of the exhaust hood pipe 34 can guide the airflow so that the airflow can be discharged after expansion and guidance. A fence debris cover 36 is threadedly provided at the air inlet end of the blower 32, which can facilitate the installation of the fence debris cover 36. The fence debris cover 36 can protect large floating debris in the air to prevent debris from entering the blower 32 and causing damage.

[0042] The water tank 41 can be supported by the support plate end of the box-type sintering furnace body 1, and the cooling water in the water tank 41 can be pumped out by the water pump 42, so that the cooling water enters the coil return pipe 44 through the main water pipe 43, and moves through the return pipe 45 after flowing inside the coil return pipe 44, so that the heated water after heat conduction enters the condenser assembly 46 for re-cooling, and the cooled water flows back to the water tank 41 for circulation operation. The cooling water can accelerate the cooling operation of the surface of the furnace 12 while flowing in the coil return pipe 44, so that the cold air can exchange heat with the inner wall of the furnace 12, thereby improving the cooling effect in the furnace 12 to a certain extent. The multiple annular pipe end design of the coil return pipe 44 can expand the furnace The fitting area on the side of 12 improves the heat dissipation effect inside the furnace 12. The coil return pipe 44 is directly fitted to the outside of the furnace 12, which can improve the conduction heat exchange effect between the coil return pipe 44 and the furnace 12, and further improve the heat dissipation efficiency in the sealed environment inside the furnace 12. The bent filling port pipe 47 is designed at the top right side of the water tank 41, which can reasonably utilize the space between the furnace box 11 and the support plate end, ensure the maximum water filling capacity of the water tank 41, and avoid the inconvenience of water filling when the water filling port is located at the top. The sealing cap 48 is threadedly sleeved on the top of the filling port pipe 47, so that the filling port pipe 47 can be closed on a daily basis to reduce the loss of water due to evaporation and the chance of debris entering.

[0043] Working principle: According to the attached Figure 5 With attached Figure 6 As shown, during use, when the material is sintered and naturally cooled in the furnace 12, the blower 32 can be started, and the first sealing valve 33 and the second sealing valve 35 can be opened synchronously, and the airflow enters the flow cavity of the furnace 12 and the furnace box 11 after being diverted by the airflow duct 31, so that the airflow is pushed synchronously from both sides of the flow cavity, and then the airflow is controlled to flow and blown out from the exhaust hood pipe 34, so as to accelerate the pushing and heat exchange effect of the hot air mass in the flow cavity of the furnace box 11 and the furnace 12;

[0044] Secondly, according to the attached Figure 7 As shown, when the blower 32 is started, the water pump 42 can be started. The water pump 42 can pump out the cooling water in the water tank 41, so that the water flows through the main water pipe 43 and then enters the inner part of the coil return pipe 44. The water flow is extended through the coil return pipe 44 to improve the flow path of the cooling water, so that the cooling water passes through the coil return pipe 44 to perform heat exchange operation on the three outer surfaces of the furnace 12. The wall temperature of the furnace 12 can be reduced during the movement of the cooling water, thereby ensuring the cooling efficiency in the furnace 12, so that the cooling water circulates and passes through the condenser assembly 46 for cooling, and then re-enters the water tank 41 for circulation operation, thereby ensuring continuous heat dissipation in the furnace 12;

[0045] Finally, according to the attached Figure 2 With attached Figure 3As shown, the threaded screw cap 25 can be rotated to be removed from the surface of the threaded shaft 24. At the same time, the threaded shaft 24 can be moved so that the threaded shaft 24 drives the movable block 23 to move in the guide groove on the surface of the furnace box 11, so that the threaded shaft 24 is disengaged from the side groove of the sealing door 21. At this time, the sealing door 21 can be rotated, and then the front of the furnace 12 can be opened. When the material in the furnace 12 is taken out, the bolts on both sides of the outer sealing plate 13 can be removed, and then the outer sealing plate 13 can be pulled out, so as to facilitate the inspection and maintenance of the coil return pipe 44 in the flow cavity between the furnace 12 and the furnace box 11 to avoid affecting the heat dissipation effect in the later stage.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-temperature box-type sintering furnace with a rapid cooling function, comprising a box-type sintering furnace body (1), characterized in that: The box-type sintering furnace body (1) comprises a furnace box (11), a furnace chamber (12) is installed inside the furnace box (11), a C-shaped flow cavity is opened between the furnace box (11) and the furnace chamber (12), an outer sealing plate (13) is installed on the front of the flow cavity of the furnace box (11) and the furnace chamber (12) by bolt insertion, a door panel group (2) is movably installed on the front of the furnace box (11), liquid cooling accessories (4) are arranged on the inner walls of the flow cavity of the furnace box (11) and the furnace chamber (12), and an air cooling accessory (3) is arranged at the bottom of the furnace box (11).

2. A high temperature box-type sintering furnace with rapid cooling function according to claim 1, characterized in that: The door panel assembly (2) comprises a sealing door (21) movably mounted on the right side of the front face of the furnace box (11), a push-pull handle (22) being mounted on the outer side of the sealing door (21), and the sealing door (21) is buckled on the outer side of the furnace chamber (12) and the outer sealing plate (13).

3. A high temperature box-type sintering furnace with rapid cooling function according to claim 2, characterized in that: The sealing door (21) is provided with a clamping groove at both upper and lower ends, and a movable block (23) is movably installed in the upper and lower ends of the front side of the furnace box (11) through the guide groove, and the front side of the movable block (23) is connected to a threaded shaft (24), the threaded shaft (24) is inserted into the clamping groove of the sealing door (21), and a threaded screw cap (25) is installed on the outer side of the threaded shaft (24) through a threaded sleeve.

4. The high-temperature box-type sintering furnace with rapid cooling function according to claim 1, characterized in that: The air cooling accessory (3) comprises an air flow duct (31) connected to and communicating with a flow cavity between a furnace box (11) and a furnace chamber (12); a blower (32) is connected to the bottom end of the air flow duct (31); the blower (32) is installed after the bottom end of the air flow duct (31) passes through the interior of the furnace box (11); a first sealing valve (33) is installed on the surface of the air flow duct (31); an exhaust hood pipe (34) is provided at the top end of the furnace box (11), and a second sealing valve (35) is installed on the outside of the exhaust hood pipe (34).

5. The high temperature box-type sintering furnace with rapid cooling function according to claim 4, characterized in that: The airflow duct (31) is designed in a Y-shaped structure, and the branch pipe end at the top of the airflow duct (31) is connected and connected to both sides of the flow cavity in the furnace box (11).

6. The high temperature box-type sintering furnace with rapid cooling function according to claim 4, characterized in that: The exhaust hood pipe (34) is designed in a funnel shape, and expansion groove structures are provided on both sides of the top of the exhaust hood pipe (34). The bottom end of the exhaust hood pipe (34) is connected to and penetrates the internal flow cavity of the furnace box (11), and a fence debris cover (36) is threadedly installed on the air inlet end of the blower (32).

7. The high temperature box-type sintering furnace with rapid cooling function according to claim 1, characterized in that: The bottom leg end of the box-type sintering furnace body (1) is provided with a support plate end, and the liquid cooling accessory (4) includes a water tank (41) installed on the surface of the support plate end, the left side of the water tank (41) is connected to a water pump (42), and the top end of the water pump (42) is connected to a main water pipe (43), the top end of the main water pipe (43) is connected to three coil return pipes (44) in sequence, and the bottom end of the last coil return pipe (44) is connected to a return pipe (45), and the end of the return pipe (45) is connected to a condenser assembly (46), the condenser assembly (46) is installed on the side of the water tank (41), and the pipe end of the condenser assembly (46) is connected and connected to the water tank (41).

8. The high-temperature box-type sintering furnace with rapid cooling function according to claim 7, characterized in that: The coiled return pipe (44) is composed of a plurality of annular pipe ends, and the annular pipe ends are connected through branch pipe ends. The coiled return pipe (44) is sequentially attached to three side end surfaces of the furnace (12).

9. The high-temperature box-type sintering furnace with rapid cooling function according to claim 7, characterized in that: A filling port pipe (47) is installed at the top end of the right side of the water tank (41). The filling port pipe (47) is designed to be a bent structure, and the top end of the filling port pipe (47) is threadedly covered with a sealing cap (48).

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