Box-type multipurpose furnace with top slow cooling structure

Abstract

The utility model discloses a box-type multi-purpose furnace with a top slow cooling structure. The box-type multi-purpose furnace comprises a heating chamber, a pushing mechanism, a cooling chamber, a double-layer lifting mechanism, a middle heat insulation door and a heat insulation door lifting air cylinder. The double-layer lifting mechanism is installed in the cooling chamber in a lifting mode and can divide the cooling chamber into a top slow cooling chamber located on the upper portion, a loading and unloading chamber located in the middle and a quenching chamber located on the lower portion. The cooling chamber is mounted beside the heating chamber, and the middle heat insulation door is mounted between the heating chamber and the cooling chamber in a lifting manner through a heat insulation door lifting cylinder, so that the heating chamber is communicated with or separated from the cooling chamber; the pushing mechanism is installed on the heating chamber, and the pushing end of the pushing mechanism can make contact with the heated furnace burden in the heating chamber and push the furnace burden into the cooling chamber. The utility model relates to the technical field of industrial heating furnaces, and can solve the problem that the production efficiency is reduced due to long time for waiting for furnace charge cooling in a heating furnace in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of industrial heating furnace technology, and in particular to a box-type multi-purpose furnace with a top slow cooling structure. Background Technology

[0002] Existing heating furnaces consist of a single, sealed chamber. During the slow cooling process, the current charge must complete its slow cooling and be ejected from the furnace via a flexible chain before a new charge can be loaded for the next heating cycle. However, this results in a long cooling time within the furnace, hindering cross-loading and unloading, significantly reducing the furnace's production efficiency and equipment utilization, and leading to high energy consumption. Therefore, there is a need for a box-type multi-purpose furnace with a top slow cooling structure, which can solve the problem of reduced production efficiency caused by the long cooling time in existing heating furnaces. Summary of the Invention

[0003] The purpose of this invention is to provide a box-type multi-purpose furnace with a top slow cooling structure, which can solve the problem of reduced production efficiency caused by long waiting time for furnace charge to cool in existing heating furnaces.

[0004] This utility model is implemented as follows:

[0005] A box-type multi-purpose furnace with a top slow cooling structure includes a heating chamber, a pushing mechanism, a cooling chamber, a double-layer lifting mechanism, a middle partition door, and a door lifting cylinder. The double-layer lifting mechanism is movably installed in the cooling chamber, dividing the cooling chamber into an upper top slow cooling chamber, a middle loading and unloading chamber, and a lower quenching chamber. The cooling chamber is installed beside the heating chamber. The middle partition door is movably installed between the heating chamber and the cooling chamber via the door lifting cylinder, allowing the heating chamber and the cooling chamber to communicate or be separated. The pushing mechanism is installed on the heating chamber, and its pushing end can contact the heated furnace charge in the heating chamber and push the charge into the cooling chamber.

[0006] The pushing mechanism includes a flexible chain drive motor and a flexible chain; the flexible chain drive motor is installed on the outer wall of the rear wall of the heating chamber, and the flexible chain is installed on the inner wall of the rear wall of the heating chamber through a chain box. The output end of the flexible chain drive motor is connected to one end of the flexible chain, and the other end of the flexible chain serves as the pushing end of the pushing mechanism, so that the other end of the flexible chain can extend out of the chain box and push the furnace material in the heating chamber.

[0007] The aforementioned double-layer lifting mechanism includes an upper lifting mechanism and a lower lifting mechanism; the upper lifting mechanism is installed in the cooling chamber in a liftable manner via an upper lifting cylinder, and the lower lifting mechanism is installed in the cooling chamber in a liftable manner via a lower lifting cylinder and is located below the upper lifting mechanism; the cavity between the upper and lower lifting mechanisms forms a loading and unloading chamber, the cavity above the upper lifting mechanism forms a top slow cooling chamber, and the cavity below the loading and unloading chamber forms a quenching chamber.

[0008] The upper lifting mechanism includes an upper drive chain and an upper chain drive motor. The upper drive chain is located in the cooling chamber, and the upper chain drive motor is installed on the outer side wall of the cooling chamber. The output shaft of the upper chain drive motor is connected to the upper drive chain.

[0009] The lower lifting mechanism includes a lower drive chain and a lower chain drive motor. The lower drive chain is located in the cooling chamber, and the lower chain drive motor is installed on the outer side wall of the cooling chamber. The output shaft of the lower chain drive motor is connected to the lower drive chain.

[0010] The top slow cooling chamber and the top of the quenching chamber are both formed with sealing grooves. The upper lifting mechanism is provided with a sealing plate in the circumferential direction. The sealing plate can be embedded in the sealing groove, so that the top slow cooling chamber forms an independent sealed working chamber, or the quenching chamber forms an independent sealed working chamber.

[0011] A cooling fan is installed on the top of the top slow cooling chamber, and cooling pipes are arranged circumferentially around the outer wall of the top slow cooling chamber.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. This utility model has a heating chamber, an intermediate partition hot chamber, and a cooling chamber. When the intermediate partition hot chamber rises via the partition hot chamber lifting cylinder, the heating chamber and the cooling chamber are connected. The furnace charge that has completed the heating / carburizing process can be pushed to the cooling chamber for the next process through the pushing mechanism. When the intermediate partition hot chamber descends via the partition hot chamber lifting cylinder, the heating chamber and the cooling chamber are separated. The next process of the current furnace charge and the loading of the next batch of new furnace charge can be carried out simultaneously, realizing cross loading and unloading. The two chambers do not interfere with each other, thereby improving the production efficiency and equipment utilization of the box-type multi-purpose furnace and saving energy.

[0014] 2. This utility model features a cooling chamber and a double-layer lifting mechanism. The upper and lower lifting mechanisms can be raised and lowered under the drive of the lifting cylinder. An independent, sealed top slow cooling chamber can be formed in the upper part of the cooling chamber for the slow cooling process of the furnace charge under a protective atmosphere, ensuring stable product quality. At the same time, an independent, sealed quenching chamber can be formed in the lower part of the cooling chamber for the quenching process of the furnace charge. A loading and unloading chamber can be formed in the middle of the cooling chamber to facilitate the unloading of the furnace charge. This allows the cooling chamber to meet the requirements of the next process of the furnace charge after the heating / carburizing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the box-type multi-purpose furnace with a top slow cooling structure according to this utility model.

[0016] In the diagram, 1 is the heating chamber, 2 is the intermediate heat exchanger, 3 is the heat exchanger lifting cylinder, 41 is the top slow cooling chamber, 42 is the loading and unloading chamber, 43 is the quenching chamber, 44 is the sealing groove, 45 is the cooling fan, 46 is the cooling pipe, 51 is the flexible chain drive motor, 6 is the upper lifting mechanism, 61 is the upper lifting cylinder, 62 is the upper drive chain, 63 is the sealing plate, 7 is the lower lifting mechanism, 71 is the lower lifting cylinder, 72 is the lower drive chain, and 8 is the furnace charge. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Please see the appendix Figure 1 A box-type multi-purpose furnace with a top slow cooling structure includes a heating chamber 1, a pushing mechanism, a cooling chamber, a double-layer lifting mechanism, a middle partition door 2, and a partition door lifting cylinder 3. The double-layer lifting mechanism is movably installed in the cooling chamber and can divide the cooling chamber into a top slow cooling chamber 41 located at the top, a loading and unloading chamber 42 located in the middle, and a quenching chamber 43 located at the bottom. The cooling chamber is installed on the side of the heating chamber 1. The middle partition door 2 is movably installed between the heating chamber 1 and the cooling chamber through the partition door lifting cylinder 3, so that the heating chamber 1 and the cooling chamber are connected or separated. The pushing mechanism is installed on the heating chamber 1, and the pushing end of the pushing mechanism can contact the heated furnace charge 8 in the heating chamber 1 and push the furnace charge 8 into the cooling chamber.

[0019] Preferably, the box-type multi-purpose furnace may include two chambers: one serving as a heating chamber 1 for heating and carburizing the furnace charge 8, and the other serving as a cooling chamber for slow cooling, quenching, and unloading of the furnace charge 8. An intermediate partition door 2 is installed between the heating chamber 1 and the cooling chamber. The piston end of the partition door lifting cylinder 3 is connected to the intermediate partition door 2, and the partition door lifting cylinder 3 controls the piston end to lift the intermediate partition door 2 by changes in air pressure.

[0020] When the intermediate partition 2 rises, the heating chamber 1 can be connected to the cooling chamber, and the pushing mechanism can push the furnace charge 8 in the heating chamber 1 into the cooling chamber, which is convenient for the next process of the furnace charge 8. When the intermediate partition 2 falls, the heating chamber 1 and the cooling chamber can be separated. When the current furnace charge 8 is being processed in the cooling chamber, a new furnace charge 8 can be loaded into the heating chamber 1, realizing cross loading and unloading without interference. There is no need to wait for the furnace charge 8 to complete the slow cooling process and be unloaded before loading a new furnace charge 8, which can improve production efficiency and equipment utilization.

[0021] Meanwhile, when receiving furnace charge 8 in the cooling chamber, the furnace charge 8 can be raised to the upper top slow cooling chamber 41 for slow cooling through the lifting of the double-layer lifting mechanism, or the furnace charge 8 can be lowered to the lower quenching chamber 43 for quenching. Alternatively, the furnace charge 8 can be moved to the middle loading and unloading chamber 42 to facilitate the unloading of the processed furnace charge 8.

[0022] The pushing mechanism includes a flexible chain drive motor 51 and a flexible chain (not shown in the figure); the flexible chain drive motor 51 is installed on the outer wall of the rear wall of the heating chamber 1, and the flexible chain is installed on the inner wall of the rear wall of the heating chamber 1 through a chain box. The output end of the flexible chain drive motor 51 is connected to one end of the flexible chain, and the other end of the flexible chain serves as the pushing end of the pushing mechanism, so that the other end of the flexible chain can extend out of the chain box and push the furnace charge 8 in the heating chamber 1.

[0023] When heating chamber 1 heats the furnace charge, a low-temperature zone is formed through the chain box to house the flexible chain, preventing damage during high-temperature heating and carburizing processes, thus extending the chain's service life and ensuring its safety and reliability. After the heating and carburizing processes are completed, the flexible chain, under the control of the flexible chain drive motor 51, extends out of the chain box and pushes the furnace charge 8, facilitating its removal from heating chamber 1. The flexible chain drive motor 51 and the flexible chain are conventional pushing mechanisms in existing industrial heating furnaces, and their working process and principle will not be elaborated here.

[0024] The double-layer lifting mechanism includes an upper lifting mechanism 6 and a lower lifting mechanism 7. The upper lifting mechanism 6 is installed in the cooling chamber in a lifting manner via an upper lifting cylinder 61, and the lower lifting mechanism 7 is installed in the cooling chamber in a lifting manner via a lower lifting cylinder 71 and is located below the upper lifting mechanism 6. The cavity between the upper lifting mechanism 6 and the lower lifting mechanism 7 forms a loading and unloading chamber 42, the cavity above the upper lifting mechanism 6 forms a top slow cooling chamber 41, and the cavity below the loading and unloading chamber 42 forms a quenching chamber 43.

[0025] The upper lifting cylinder 61 uses air pressure to drive the upper lifting mechanism 6 to move up and down, and the lower lifting cylinder 71 uses air pressure to drive the lower lifting mechanism 7 to move up and down. The upper lifting mechanism 6 and the lower lifting mechanism 7 can move up and down independently or synchronously, thereby dividing the cooling chamber into the upper top slow cooling chamber 41, the middle loading and unloading chamber 42 and the lower quenching chamber 43.

[0026] Preferably, the upper lifting cylinder 61 and the lower lifting cylinder 71 are installed outside the cooling chamber to avoid high temperatures affecting the air pressure control of the upper lifting cylinder 61 and the lower lifting cylinder 71. The piston end of the upper lifting cylinder 61 passes through the top plate of the cooling chamber through a movable seal and is connected to the upper lifting mechanism 6 to control the lifting and lowering of the upper lifting mechanism 6. The piston end of the lower lifting cylinder 71 passes through the side plate of the cooling chamber through a movable seal and is connected to the lower lifting mechanism 7 to control the lifting and lowering of the lower lifting mechanism 7. Controlling the piston end lifting and lowering through an external air source and cylinders is a conventional lifting operation method in the art, and its working process and working principle will not be described in detail here.

[0027] The upper lifting mechanism 6 includes an upper drive chain 62 and an upper chain drive motor (not shown in the figure). The upper drive chain 62 is located in the cooling chamber, and the upper chain drive motor is installed on the outer wall of the side wall of the cooling chamber. The output shaft of the upper chain drive motor is connected to the upper drive chain 62.

[0028] Preferably, the upper drive chain 62 can be a ring-shaped toothed chain, with several transmission gears rotatably mounted in the upper lifting mechanism 6 via axles. These gears are used to tension and mesh the ring-shaped toothed chain. The output shaft of the upper chain drive motor is coaxially fixed to one of the transmission gears, driving the gear to rotate. This achieves cyclic transmission of the upper drive chain 62 through tooth meshing. The upper drive chain 62 is used to move the position of the furnace charge 8 on the upper lifting mechanism 7 to facilitate a slow cooling process for the furnace charge 8 or to push the furnace charge 8 out of the cooling chamber.

[0029] The lower lifting mechanism 7 includes a lower drive chain 72 and a lower chain drive motor (not shown in the figure). The lower drive chain 72 is located in the cooling chamber, and the lower chain drive motor is installed on the outer wall of the side wall of the cooling chamber. The output shaft of the lower chain drive motor is connected to the lower drive chain 72.

[0030] Preferably, the lower drive chain 72 can be a ring-shaped toothed chain, with several transmission gears rotatably mounted in the lower lifting mechanism 7 via axles. These gears are used to tension and mesh the ring-shaped toothed chain. The output shaft of the lower chain drive motor is coaxially fixed to one of the transmission gears, driving the gear to rotate. This achieves cyclic transmission of the lower drive chain 72 through tooth meshing. The lower drive chain 72 is used to move the position of the furnace charge 8 on the lower lifting mechanism 7 to facilitate quenching of the furnace charge 8 or to push the furnace charge 8 out of the cooling chamber.

[0031] The upper drive chain 62 and the lower drive chain 72 are equipped with carrier plates for placing the furnace charge 8 to ensure the receiving and conveying of the furnace charge 8.

[0032] The bottom of the top slow cooling chamber 41 and the top of the quenching chamber 43 are both formed with sealing grooves 44. The upper lifting mechanism 6 is circumferentially provided with a sealing plate 63. The sealing plate 63 can be embedded in the sealing groove 44, so that the top slow cooling chamber 41 forms an independent sealed working chamber, or the quenching chamber 43 forms an independent sealed working chamber.

[0033] When the upper lifting mechanism 6 rises to the bottom of the top slow cooling chamber 41, the sealing plate 63 and the sealing groove 44 work together to form an independent sealed top slow cooling chamber 41 in the upper part of the cooling chamber, thus meeting the slow cooling process requirements of the furnace charge 8. Similarly, when the upper lifting mechanism 6 descends to the top of the quenching chamber 43, the sealing plate 63 and the sealing groove 44 work together to form an independent sealed quenching chamber 43 in the lower part of the cooling chamber, thus meeting the quenching (oil quenching) process requirements of the furnace charge 8.

[0034] A cooling fan 45 is installed on the top of the top slow cooling chamber 41, and cooling pipes 46 are arranged circumferentially around the outer wall of the top slow cooling chamber 41.

[0035] Preferably, multiple cooling fans 45 can be provided. The number and installation position of the cooling fans 45 can be adaptively adjusted according to the actual slow cooling process requirements to ensure that the slow cooling process of the furnace charge 8 meets the processing requirements. The cooling pipe 46 can be a spiral coil, which is used to coil around the outside of the top slow cooling chamber 41. Circulating cooling water can be introduced into the cooling pipe 46 to further improve the slow cooling effect of the furnace charge 8.

[0036] Please see the appendix Figure 1 The working process and working principle of this utility model are as follows:

[0037] After the furnace charge 8 completes the heating and carburizing process in the heating chamber 1, the partition door lifting cylinder 3 controls the intermediate partition door 2 to move upward, so that the heating chamber 1 is connected to the cooling chamber.

[0038] The flexible chain is driven by the flexible chain drive motor 51 to extend the flexible chain out of the chain box and push the furnace charge 8 in the heating chamber 1, thus moving the furnace charge 8 from the heating chamber 1 to the cooling chamber. The flexible chain drive motor 51 then drives the flexible chain back into the chain box. The partition door lifting cylinder 3 controls the intermediate partition door 2 to move downward, separating the heating chamber 1 from the cooling chamber. At this point, a new batch of furnace charge 8 can be loaded into the heating chamber 1 without being affected by the slow cooling process of the furnace charge 8, achieving cross-loading and unloading, improving production efficiency and equipment utilization.

[0039] Depending on the process required for the charge 8, when the charge 8 is pushed out of the heating chamber 1, it can be pushed into the top slow cooling chamber 41, the loading and unloading chamber 42, or the quenching chamber 43.

[0040] When the furnace charge 8 requires a slow cooling process, the upper lifting cylinder 61 controls the upper lifting mechanism 6 to descend, and the lower lifting cylinder 71 controls the lower lifting mechanism 7 to descend, so as to avoid interfering with the descent of the upper lifting mechanism 6. The upper lifting mechanism 6 is moved to be flush with the bottom of the heating chamber 1, so that the furnace charge 8 is pushed from the heating chamber 1 onto the upper lifting mechanism 6. Then, the upper lifting cylinder 61 controls the upper lifting mechanism 6 to rise, so that the sealing plate 63 is embedded in the sealing groove 44. The upper lifting mechanism 6 forms an independent sealed top slow cooling chamber 41 in the upper part of the cooling chamber for the slow cooling process of the furnace charge 8.

[0041] The upper chain drive motor drives the upper drive chain 62 to move the furnace charge 8 to the middle working position of the top slow cooling chamber 41. The cooling fan 45 is started, and cooling water is circulated in the cooling pipe 46. According to the process requirements, an appropriate amount of protective atmosphere (such as nitrogen) is introduced into the top slow cooling chamber 41, so that the furnace charge 8 is slowly cooled in the independently sealed top slow cooling chamber 41 under the protective atmosphere, ensuring stable product quality.

[0042] When the furnace charge 8 needs to undergo quenching (oil quenching) process, the upper lifting cylinder 61 controls the upper lifting mechanism 6 to rise to avoid interfering with the rise of the lower lifting mechanism 7. The lower lifting cylinder 71 controls the lower lifting mechanism 7 to rise, moving the lower lifting mechanism 7 to be flush with the bottom of the heating chamber 1, so that the furnace charge 8 is pushed from the heating chamber 1 onto the upper drive chain 72 of the lower lifting mechanism 7.

[0043] The lower lifting mechanism 7 is then lowered into the quenching chamber 43 by the lower lifting cylinder 71, and the upper lifting mechanism 6 is lowered by the upper lifting cylinder 61, so that the sealing plate 63 is embedded into the sealing groove 44. The upper lifting mechanism 6 forms an independent sealed quenching chamber 43 in the lower part of the cooling chamber. The lower chain drive motor drives the lower drive chain 72 to move the furnace charge 8 to the middle working position of the quenching chamber 43, so that the quenching process of the furnace charge 8 can be carried out.

[0044] When the furnace charge 8 needs to be discharged, the upper lifting cylinder 61 controls the upper lifting mechanism 6 to rise and fall, and the lower lifting cylinder 71 controls the lower lifting mechanism 7 to rise and fall, so that the loading and unloading chamber 42 between the upper lifting mechanism 6 and the lower lifting mechanism 7 is aligned with the discharge port in the middle of the cooling chamber, and the furnace door at the discharge port is opened. The lower drive chain 72 is driven by the lower chain drive motor to move the furnace charge 8 to the discharge port of the cooling chamber, so that the furnace charge 8 can be unloaded.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A box-type multi-purpose furnace with a top slow-cooling structure, characterized in that: It includes a heating chamber (1), a pushing mechanism, a cooling chamber, a double-layer lifting mechanism, a middle partition hot door (2), and a door lifting cylinder (3); the double-layer lifting mechanism can be installed in the cooling chamber in a lifting manner, and the double-layer lifting mechanism can divide the cooling chamber into a top slow cooling chamber (41) located at the top, a loading and unloading chamber (42) located in the middle, and a quenching chamber (43) located at the bottom; the cooling chamber is installed on the side of the heating chamber (1), and the middle partition hot door (2) can be installed in a lifting manner between the heating chamber (1) and the cooling chamber through the door lifting cylinder (3), so that the heating chamber (1) and the cooling chamber are connected or separated; the pushing mechanism is installed on the heating chamber (1), and the pushing end of the pushing mechanism can contact the heated furnace charge (8) in the heating chamber (1) and push the furnace charge (8) into the cooling chamber.

2. The box-type multi-purpose furnace with a top slow-cooling structure according to claim 1, characterized in that: The pushing mechanism includes a flexible chain drive motor (51) and a flexible chain; the flexible chain drive motor (51) is installed on the outer wall of the rear wall of the heating chamber (1), and the flexible chain is installed on the inner wall of the rear wall of the heating chamber (1) through a chain box. The output end of the flexible chain drive motor (51) is connected to one end of the flexible chain, and the other end of the flexible chain serves as the pushing end of the pushing mechanism, so that the other end of the flexible chain can extend out of the chain box and push the furnace material (8) in the heating chamber (1).

3. The box-type multi-purpose furnace with a top slow-cooling structure according to claim 1, characterized in that: The double-layer lifting mechanism includes an upper lifting mechanism (6) and a lower lifting mechanism (7); the upper lifting mechanism (6) is installed in the cooling chamber in a liftable manner through an upper lifting cylinder (61), and the lower lifting mechanism (7) is installed in the cooling chamber in a liftable manner through a lower lifting cylinder (71) and is located below the upper lifting mechanism (6); the cavity between the upper lifting mechanism (6) and the lower lifting mechanism (7) forms a loading and unloading chamber (42), the cavity above the upper lifting mechanism (6) forms a top slow cooling chamber (41), and the cavity below the loading and unloading chamber (42) forms a quenching chamber (43).

4. The box-type multi-purpose furnace with a top slow-cooling structure according to claim 3, characterized in that: The upper lifting mechanism (6) includes an upper drive chain (62) and an upper chain drive motor. The upper drive chain (62) is located in the cooling chamber, and the upper chain drive motor is installed on the outer wall of the side wall of the cooling chamber. The output shaft of the upper chain drive motor is connected to the upper drive chain (62).

5. The box-type multi-purpose furnace with a top slow-cooling structure according to claim 3, characterized in that: The lower lifting mechanism (7) includes a lower drive chain (72) and a lower chain drive motor. The lower drive chain (72) is located in the cooling chamber, and the lower chain drive motor is installed on the outer wall of the side wall of the cooling chamber. The output shaft of the lower chain drive motor is connected to the lower drive chain (72).

6. The box-type multi-purpose furnace with a top slow-cooling structure according to claim 3, characterized in that: The bottom of the top slow cooling chamber (41) and the top of the quenching chamber (43) are both formed with sealing grooves (44). The upper lifting mechanism (6) is provided with a sealing plate (63) in the circumferential direction. The sealing plate (63) can be embedded in the sealing groove (44) so ​​that the top slow cooling chamber (41) forms an independent sealed working chamber, or the quenching chamber (43) forms an independent sealed working chamber.

7. The box-type multi-purpose furnace with a top slow-cooling structure according to claim 1, 3, or 6, characterized in that: A cooling fan (45) is installed on the top of the top slow cooling chamber (41), and cooling pipes (46) are arranged circumferentially around the outer wall of the top slow cooling chamber (41).

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