A cover type annealing furnace having an internal circulation system

Abstract

The application relates to the technical field of annealing furnaces, in particular to a cover type annealing furnace with an internal circulation system, which comprises a base, a placing table arranged on the base, a centrifugal fan installed on the placing table, a plurality of flow guide plates fixedly connected on the placing table, the flow guide plates being arranged at intervals, the flow guide plates being fixedly connected with a placing plate, a placing ring fixedly connected at the bottom of the placing table, an inner cover and an outer cover sequentially sleeved on the base, a spraying seat arranged at the top of the inner cover, a plurality of water spraying holes arranged at intervals formed in the spraying seat, a spraying hose connected with the spraying seat, a water collecting tank arranged on one side of the base, a water pump installed in the water collecting tank, and the water outlet end of the water pump connected with the spraying hose, so that the material thermal deviation in the annealing furnace is reduced, and the material processing quality is guaranteed.

Description

Technical Field

[0001] This application relates to the field of annealing furnace technology, and in particular to a bell-type annealing furnace with an internal circulation system. Background Technology

[0002] Annealing is a common heat treatment process for metallic materials, mainly used to eliminate internal stress, refine grains, or improve processing performance. An annealing furnace is a piece of equipment used in the annealing process. In the annealing furnace, the material needs to undergo specific heating, holding, and cooling processes to achieve the defined process requirements.

[0003] The existing annealing furnaces are mainly heated by electric heating or gas heating. Annealing furnaces using electric heating are mostly composed of a furnace platform, a sealed inner cover, a heating cover, and a cooling system. When in use, the material is placed on the furnace platform and then covered with the sealed inner cover and the heating cover in sequence. The furnace is heated by the heating cover.

[0004] The existing technical solutions mentioned above have the following drawbacks: during heating, the distance between the material placed in the furnace and the heating hood is not uniform, which can easily lead to a large difference in the heating of the material surface at different locations, and even reduce the material processing quality. Utility Model Content

[0005] In order to reduce the thermal deviation of materials in the annealing furnace and ensure the quality of material processing, this application provides a bell-type annealing furnace with an internal circulation system.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: A bell-type annealing furnace with an internal circulation system includes a base, a placement platform on the base, a centrifugal fan mounted on the placement platform, and guide plates fixedly connected to the placement platform. Multiple guide plates are spaced apart and are collectively fixed to a placement plate. A placement ring is fixedly connected to the bottom of the placement platform. An inner cover and an outer cover are sequentially fitted onto the base. A spray seat is provided on the top of the inner cover, and multiple spray holes are spaced apart on the spray seat. A spray hose is connected to the spray seat. A water collection tank is provided on one side of the base, and a water pump is installed in the water collection tank. The outlet of the water pump is connected to the spray hose.

[0007] By adopting the above technical solution, the centrifugal fan is started, and the air near the placement platform in the furnace enters the centrifugal fan, then flows through the guide plate to the gap between the placement plate and the inner cover and is discharged. This allows the air in the inner cover to flow, which can make the temperature in the furnace rise evenly or improve the heat exchange efficiency between the inner cover and the air in the furnace when the inner cover is heated, ensuring a uniform temperature field in the annealing furnace. At the same time, it can drive the gas in the furnace to flow in the gaps between the materials, ensuring that the protective gas fully participates in the annealing process, reducing the thermal deviation of the materials in the annealing furnace, ensuring the quality of material processing, and ensuring the safety and stability of the annealing furnace operation.

[0008] Optionally, the surface of the guide plate is curved into an arc shape.

[0009] By adopting the above technical solution, the overall structural strength of the guide plate and the placement plate can be increased, allowing air to flow spirally upward along the inner wall of the inner cover. This can improve the heat exchange efficiency between the inner cover and the air in the furnace when the inner cover is heated, and ensure uniform temperature in the annealing furnace.

[0010] Optionally, the outlet end of the water pump is connected to an outlet pipe, and an outlet valve is installed on the outlet pipe. Multiple outlet valves are spaced apart, and one end of the outlet valve is connected to the flexible hose. A fixing ring is fixed to the bottom of the inner cover, and the fixing ring abuts against the placement ring. A baffle plate is fixed to the fixing ring. The baffle plate is arranged in a ring shape, and a water collection pipe is fixed to the baffle plate. One end of the water collection pipe is located above the water collection tank.

[0011] By adopting the above technical solution, when multiple annealing furnaces are set up, the annealing furnaces are arranged on both sides of the water collection tank along the length of the water collection tank. Multiple water outlet valves on the water outlet pipe can be connected to multiple spray hoses, so that multiple spray hoses connected to spray seats can cool multiple annealing furnaces respectively. The cold water in the water collection tank flows out from the top of the inner cover and flows down along the outer wall of the inner cover until it flows down along the outer wall of the inner cover to the annular groove formed by the baffle plate and the peripheral wall of the inner cover. Finally, it flows into the water collection tank from the water collection pipe for cooling. The water flowing down from the top of the inner cover along the outer wall of the inner cover can increase the contact area between the water and the outer wall of the inner cover. The water in the water collection tank circulates through the outer wall of the inner cover, which can reduce the temperature of the inner cover, reduce the amount of water consumed when cooling the annealing furnace, and can cool the inner covers of multiple annealing furnaces at the same time, thereby improving working efficiency and reducing the amount of water consumed when cooling multiple annealing furnaces.

[0012] Optionally, a cooling plate is fixed to the bottom of the centrifugal fan. The cooling plate has a cavity and is connected to a cooling hose. There are at least two cooling hoses, one of which is connected to one end of the water outlet valve, and the other is located above the water collection tank.

[0013] By adopting the above technical solution, the water in the water collection tank circulates within the cooling plate, which can reduce the temperature of the centrifugal fan, reduce the risk of damage to the centrifugal fan due to high temperature, and ensure the safety and stability of the centrifugal fan operation.

[0014] Optionally, a sealing strip is fixed to the placement ring.

[0015] By adopting the above technical solutions, the sealing strip can improve the sealing performance at the connection between the inner cover and the placement platform, ensure the stability of the annealing furnace's material processing effect, ensure the uniform temperature reduction inside the furnace during cooling, and ensure the safety and stability of the annealing furnace operation.

[0016] Optionally, a cooling pipe is fixed to the fixing ring. The cooling pipe is arranged in a ring along one side of the baffle plate. The two ends of the cooling pipe are close to each other and connected to a cooling hose. One cooling hose is connected to one end of the water outlet valve, and the other cooling hose is located above the water collection tank.

[0017] By adopting the above technical solution, the cooling pipe can reduce the temperature at the connection between the fixing ring and the sealing strip through water circulation inside the pipe. It can also reduce the temperature of the sealing strip when heating or heat preservation in the annealing furnace, ensuring the stability of the sealing effect of the sealing strip and reducing the risk of damage to the sealing strip due to high temperature.

[0018] Optionally, the top of the inner cover is machined to form an outwardly protruding spherical surface, and the peripheral wall of the inner cover is machined to form a corrugated shape.

[0019] By adopting the above technical solution, the contact area between the water flowing out of the spray seat and the outer wall of the inner cover can be increased, the heat exchange efficiency between the water and the inner cover can be improved, the flowing water can cover the outer wall of the inner cover, and the cooling effect of the circulating water on the inner cover can be guaranteed.

[0020] Optionally, the bottom of the spray seat is machined to form a spherical surface that fits the top of the inner cover.

[0021] By adopting the above technical solution, the bottom of the spray seat is processed to form an arc surface that fits the inner cover, which makes it easier for workers to place the spray seat on the inner cover and improves the stability of the spray seat on the inner cover.

[0022] In summary, this application has the following technical effects: 1. By setting up centrifugal fans and baffles, the air in the inner shroud is circulated, which can make the temperature inside the furnace rise evenly or improve the heat exchange efficiency between the inner shroud and the air inside the furnace when the furnace is heated, ensuring a uniform temperature field inside the annealing furnace. At the same time, it can drive the gas inside the furnace to flow in the gaps between the materials, ensuring that the protective gas fully participates in the annealing process, reducing the thermal deviation of the materials inside the annealing furnace, ensuring the quality of material processing, and ensuring the safety and stability of the annealing furnace operation. 2. By installing a cooling plate, the water in the water collection tank circulates within the cooling plate, which can reduce the temperature of the centrifugal fan, reduce the risk of damage to the centrifugal fan due to high temperature, and ensure the safety and stability of the centrifugal fan operation. 3. By setting a sealing strip, the sealing performance at the connection between the inner cover and the placement platform can be improved, ensuring the stability of the annealing furnace's material processing effect, ensuring the uniform temperature reduction inside the furnace during cooling, and ensuring the safety and stability of the annealing furnace operation. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the object of this application; Figure 2This is a cross-sectional structural diagram of this application; Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0024] Explanation of reference numerals in the attached drawings: 1. Base; 2. Placement platform; 21. Placement ring; 22. Placement plate; 23. Sealing strip; 24. Centrifugal fan; 25. Guide plate; 26. Cooling tray; 3. Inner cover; 31. Fixing ring; 32. Water baffle; 33. Cooling pipe; 34. Water collection pipe; 4. Water collection trough; 41. Water pump; 42. Water outlet pipe; 43. Water outlet valve; 5. Sprayer seat; 51. Spray hose. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] This application discloses a bell-type annealing furnace with an internal circulation system, as shown in the embodiments below. Figure 1 and Figure 2 The bell-type annealing furnace includes a base 1, a placement platform 2 on the top of the base 1, a placement plate 22 on the top of the placement platform 2, an inner cover 3 on the base 1, the top surface of the inner cover 3 is machined into an outwardly protruding spherical surface, the peripheral wall of the inner cover 3 is machined into a corrugated shape along the height direction of the inner cover 3, a fixing ring 31 is integrally formed at the bottom of the inner cover 3, and an outer cover with a heating function is fitted on the outer wall of the inner cover 3. The outer cover heats or keeps the interior of the annealing furnace warm. The outer cover is removed when the annealing furnace cools down. The outer cover in this embodiment is not shown in the attached drawings. A water collection tank 4 is provided on one side of the base 1. The water collection tank 4 is cuboid. A water pump 41 is installed in the water collection tank 4. The water inlet of the water pump 41 is located at the bottom of the water collection tank 4. The water outlet of the water pump 41 is connected to a water outlet pipe 42. The water outlet pipe 42 is fixed to the top of the water collection tank 4 by bolts. The end of the water outlet pipe 42 away from the water pump 41 is closed. Multiple water outlet valves 43 are installed on the water outlet pipe 42.

[0027] Reference Figure 1 and Figure 2 The inner cover 3 is provided with a spray seat 5 on the top. The spray seat 5 is annular and has spray holes on its side wall. Multiple spray holes are spaced apart. The spray seat 5 is machined to form an arc surface that fits the top of the inner cover 3 on the side facing the inner cover 3. A spray hose 51 is connected to one side of the spray seat 5. One end of the spray hose 51 is connected to one end of a water outlet valve 43 on the water outlet pipe 42.

[0028] Reference Figure 2 and Figure 3The bottom periphery of the placement platform 2 is integrally formed with a placement ring 21. A groove is formed on the top surface of the placement ring 21 near the placement platform 2, and one side of the groove connects to the side wall of the placement platform 2. A sealing strip 23 is adhered to the side wall away from the placement platform 2. In this embodiment, the sealing strip 23 is made of silicone. A guide plate 25 is welded inside the placement platform 2. The top of the placement platform 2 is machined into an inwardly concave spherical shape. A centrifugal fan 24 is installed on the top of the placement platform 2. The guide plate 25 is bent into an arc shape. Multiple guide plates 25 are arranged at intervals on the top of the placement platform 2 in a centrally symmetrical manner. The top of the guide plates 25 are welded to the placement plate 22. A through hole is opened at the center of the surface of the placement plate 22. The bottom of the centrifugal fan 24 is fixed to the cooling plate 26 by bolts. A cavity is opened in the cooling plate 26. The cooling plate 26 is connected to a cooling hose. There are two cooling hoses. One cooling hose is connected to one end of a water outlet valve 43 of the water outlet pipe 42, and the other cooling hose is located above the water collection tank 4.

[0029] Reference Figure 1 and Figure 2 The bottom of the inner cover 3 is integrally formed with a fixing ring 31. The fixing ring 31 is sleeved on the placement platform 2 and abuts against the top surface of the placement ring 21. A water baffle 32 is integrally formed on the side of the top surface of the fixing ring 31 away from the inner cover 3. The water baffle 32 is arranged in a ring and forms an annular groove with the outer wall of the inner cover 3. A water collecting pipe 34 is welded to the side of the water baffle 32 near the water collecting tank 4. One end of the water collecting pipe 34 is connected to the side of the water baffle 32 facing the inner cover 3, and the other end of the water collecting pipe 34 is located above the water collecting tank 4. A cooling pipe 33 is welded to the side of the baffle plate 32 facing the inner cover 3. The cooling pipe 33 is arranged in a ring on the fixing ring 31 with its two ends close to each other. The cooling pipe 33 is located above the sealing strip 23. Both ends of the cooling pipe 33 are bent away from the inner cover 3 and pass through the baffle plate 32. Both ends of the cooling pipe 33 are connected to cooling hoses. One cooling hose is connected to one end of a water outlet valve 43 on the water outlet pipe 42, and the other cooling hose is located in the water collection tank 4 at the end away from the cooling pipe 33.

[0030] When using this bell-type annealing furnace, the material is placed on the placement plate 22, and the inner cover 3 and outer cover are installed and fixed in sequence using a hoisting machine. The furnace is heated or kept warm by the outer cover. The centrifugal fan 24 is started, and air enters the centrifugal fan 24 through the through holes on the placement plate 22. Then, it flows through the guide plate 25 to the gap between the placement plate 22 and the inner cover 3 and is discharged. This airflow in the inner cover 3 can make the furnace temperature rise evenly, improve the heat exchange efficiency between the inner cover 3 and the furnace air when it is heated, ensure a uniform temperature field in the annealing furnace, and drive the gas in the furnace to flow in the gaps between the materials. This ensures that the protective gas fully participates in the annealing process, reduces the thermal deviation of the materials in the annealing furnace, ensures the quality of material processing, and ensures the safety and stability of the annealing furnace operation.

[0031] When cooling is required inside the annealing furnace, the outer cover is removed using a hoist, the spray base 5 is placed on top of the inner cover 3, the water pump 41 is started, and the outlet valve 43 connected to the spray base 5 is opened, allowing the cold water in the water collection tank 4 to flow out from the top of the inner cover 3 and down the outer wall of the inner cover 3 until it flows down the outer wall of the inner cover 3 into the annular groove formed by the baffle plate 32 and the peripheral wall of the inner cover 3. Finally, it flows into the water collection tank 4 through the water collection pipe 34 for cooling. The rectangular water collection tank 4 can improve the cooling effect of the water in the water collection tank 4, which is beneficial for... The inner cover 3 is cooled by water circulation. Water in the water collection tank 4 is transported to the spray seat 5 by water pump 41. Water flows down the outer wall of the inner cover 3 from the top, which can increase the contact area between the water and the outer wall of the inner cover 3. The water in the water collection tank 4 circulates over the outer wall of the inner cover 3, which can reduce the temperature of the inner cover 3, thereby reducing the temperature inside the annealing furnace. The water flowing down the outer wall of the inner cover 3 is blocked by the baffle and flows into the water collection tank 4 through the water collection pipe 34 for cooling, which can reduce the amount of water consumed when the annealing furnace is cooled.

[0032] The guide plate 25 is curved in an arc shape, which can increase the overall structural strength of the guide plate 25 and the placement plate 22, and make the air flow upward spirally along the inner wall of the inner cover 3. This can improve the heat exchange efficiency between the inner cover 3 and the air in the furnace when the inner cover 3 is heated, and ensure the uniform temperature in the annealing furnace.

[0033] Starting the water pump 41 causes the water in the water collection tank 4 to circulate in the cooling plate 26, which can reduce the temperature of the centrifugal fan 24, reduce the risk of damage to the centrifugal fan 24 due to high temperature, and ensure the safety and stability of the centrifugal fan 24 in operation.

[0034] The top of the inner cover 3 is spherical and the outer wall is corrugated, which can increase the contact area between the water flowing out of the spray seat 5 and the outer wall of the inner cover 3, improve the heat exchange efficiency between the water and the inner cover 3, ensure that the flowing water can cover the outer wall of the inner cover 3, and ensure the cooling effect of the circulating water on the inner cover 3.

[0035] The sealing strip 23 can improve the sealing performance at the connection between the inner cover 3 and the placement platform 2, ensure the stability of the material processing effect of the annealing furnace, ensure the uniform temperature reduction inside the furnace during cooling, and ensure the safety and stability of the annealing furnace operation.

[0036] The cooling pipe 33 can reduce the temperature at the connection between the fixing ring 31 and the sealing strip 23 by circulating water inside the pipe. It can also reduce the temperature of the sealing strip 23 when heating or keeping it warm in the annealing furnace, ensuring the stability of the sealing effect of the sealing strip 23 and reducing the risk of damage to the sealing strip 23 due to high temperature.

[0037] The rectangular water collection tank 4 can increase the volume of the water collection tank 4 and increase the contact area between the water inside and the air, thereby improving the cooling effect of the water inside the water collection tank 4. When multiple annealing furnaces are set up, the annealing furnaces are arranged on both sides of the water collection tank 4 along the length of the water collection tank 4. Multiple water outlet valves 43 on the water outlet pipe 42 can be connected to multiple spray hoses 51, so that multiple spray hoses 51 connected to spray seats 5 can cool multiple annealing furnaces respectively. The inner cover 3 of multiple annealing furnaces can be cooled at the same time, improving working efficiency and reducing the amount of water consumed when multiple annealing furnaces are cooled.

[0038] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A bell-type annealing furnace with an internal circulation system, characterized in that, The bell-type annealing furnace includes a base (1), a placement platform (2) is provided on the base (1), a centrifugal fan (24) is installed on the placement platform (2), a guide plate (25) is fixedly connected to the placement platform (2), multiple guide plates (25) are spaced apart, and multiple guide plates (25) are fixedly connected to a placement plate (22). A placement ring (21) is fixedly connected to the bottom of the placement platform (2). An inner cover (3) and an outer cover are sequentially fitted on the base (1). A spray seat (5) is provided on the top of the inner cover (3). A spray hole is provided on the spray seat (5), and multiple spray holes are spaced apart. A spray hose (51) is connected to the spray seat (5). A water collection tank (4) is provided on one side of the base (1). A water pump (41) is installed in the water collection tank (4), and the outlet of the water pump (41) is connected to the spray hose (51).

2. The bell-type annealing furnace with an internal circulation system according to claim 1, characterized in that: The surface of the guide plate (25) is curved into an arc shape.

3. A bell-type annealing furnace with an internal circulation system according to claim 1, characterized in that: The outlet end of the water pump (41) is connected to the outlet pipe (42), and the outlet pipe (42) is equipped with an outlet valve (43). Multiple outlet valves (43) are spaced apart. One end of the outlet valve (43) is connected to the hose. A fixing ring (31) is fixed to the bottom of the inner cover (3). The fixing ring (31) abuts against the placement ring (21). A baffle plate (32) is fixed to the fixing ring (31). The baffle plate (32) is arranged in a ring shape. A water collection pipe (34) is fixed to the baffle plate (32). One end of the water collection pipe (34) is located above the water collection tank (4).

4. A bell-type annealing furnace with an internal circulation system according to claim 3, characterized in that: The centrifugal fan (24) is fixed to the bottom of a cooling plate (26), and the cooling plate (26) is provided with a cavity. The cooling plate (26) is connected to a cooling hose, and there are at least two cooling hoses. One cooling hose is connected to one end of a water outlet valve (43), and the other cooling hose is located above the water collection tank (4).

5. A bell-type annealing furnace with an internal circulation system according to claim 4, characterized in that: A sealing strip (23) is fixedly attached to the placement ring (21).

6. A bell-type annealing furnace with an internal circulation system according to claim 5, characterized in that: A cooling pipe (33) is fixedly connected to the fixed ring (31). The cooling pipe (33) is arranged in a ring along one side of the baffle plate (32). The two ends of the cooling pipe (33) are close to each other and connected to a cooling hose. One cooling hose is connected to one end of the outlet valve (43), and the other cooling hose is located above the water collection tank (4).

7. A bell-type annealing furnace with an internal circulation system according to claim 2, characterized in that: The top of the inner cover (3) is machined to form an outwardly protruding spherical surface, and the peripheral wall of the inner cover (3) is machined to form a corrugated shape.

8. A bell-type annealing furnace with an internal circulation system according to claim 7, characterized in that: The bottom of the spray seat (5) is machined to form a spherical surface that fits the top of the inner cover (3).

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