Reverse suction fan for alloy smelting

Abstract

The utility model discloses a reverse suction fan for alloy smelting, which relates to the technical field of reverse suction fans and comprises a base plate seat, a servo motor and a reverse suction fan are arranged on the upper end face of the base plate seat, the flow path of waste gas can be further prolonged in a limited space through a bent and roundabout snakelike bent pipe, and the flow path of the waste gas can be further prolonged. The exhaust fan is arranged in the snake-shaped bent pipe, so that heat can be fully transmitted into the snake-shaped bent pipe, the heat of the snake-shaped bent pipe is efficiently transmitted into air by the heat dissipation fin plate, the purpose of heat dissipation of waste gas is achieved, the linkage shaft synchronously drives the exhaust fan to rotate during back suction of the waste gas, and the exhaust fan accelerates external gas and then exhausts the external gas through the exhaust hood. The end, close to the reverse suction fan, of the exhaust fan is of a flaring structure, so that when air flow is blown to the reverse suction fan to accelerate flowing of air nearby the reverse suction fan for heat dissipation, diffused air flow can be blown to the snake-shaped bent pipe area to assist the snake-shaped bent pipe and the heat dissipation fin plates for heat dissipation, the reverse suction fan is further prevented from being overheated, and the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of reverse suction fan technology, specifically to a reverse suction fan for alloy smelting. Background Technology

[0002] Alloys are homogeneous mixtures formed by fusing two or more metals or metals with non-metallic elements. They possess metallic properties. In the alloy smelting process, reverse suction fans are often used to assist the smelting furnace in the discharge of waste gas.

[0003] Chinese Patent Publication No. CN202222032596.6, entitled "A Reverse Suction Permanent Magnet High-Speed ​​Centrifugal Fan," includes a centrifugal fan body and a mounting base disposed at the bottom of the centrifugal fan body. Fixing bolts are symmetrically installed on both sides of the top of the centrifugal fan body, and the threads of the fixing bolts penetrate the centrifugal fan body and are threadedly connected to threaded holes opened on the mounting base. A retaining plate has symmetrically formed snap-fit ​​grooves on both sides, and a retaining plate is slidably snapped into the grooves by a retaining spring. The bottom of the retaining plate abuts against the top sides of the centrifugal fan body. By pressing the retaining plate inward, the retaining plate can easily penetrate the centrifugal fan body. After penetration, the retaining plate pops out under the action of the retaining spring, further stabilizing the structure of the centrifugal fan body.

[0004] The shortcomings of the above-mentioned existing technical solutions are as follows: Although the above solutions ensure the stability of the centrifugal fan during use, the filtered exhaust gas emitted during alloy smelting has a certain amount of heat. The reverse suction fan will absorb some heat during the exhaust gas discharge process. During long-term operation, the reverse suction fan is prone to overheating, which can cause cracks in the device, greatly reduce the service life of the device, and affect the normal use of the device. Utility Model Content

[0005] The purpose of this utility model is to provide a reverse suction fan for alloy smelting to solve the technical problems mentioned in the background art.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0007] A reverse suction fan for alloy smelting includes a base plate;

[0008] A servo motor and a reverse suction fan are provided on the upper surface of the base plate, and the servo motor and the reverse suction fan are distributed on the same center line. The output end of the servo motor is provided with a linkage shaft for driving the reverse suction fan. An exhaust fan is sleeved on the outside of the linkage shaft, and an exhaust hood is provided on the outside of the exhaust fan. A first support frame for supporting the exhaust hood is provided on the base plate. An air inlet is opened on the end face of the reverse suction fan away from the servo motor. An air collecting hood is provided on the air inlet. A serpentine bend is provided on the input end of the air collecting hood. Several sets of heat dissipation fins are provided at the bottom of the serpentine bend.

[0009] As a further embodiment of this utility model: the servo motor and the bottom of the reverse suction fan are provided with a shock-absorbing base, and the shock-absorbing base is fixedly connected to the base plate by bolts.

[0010] As a further embodiment of this utility model: the exhaust hood is welded from a straight cylinder and a flared cylinder. The inner diameter of the straight cylinder is equal, and the inner diameter of the flared cylinder gradually increases from one end closer to the straight cylinder to the other end. The maximum inner diameter of the flared cylinder is greater than the diameter of the reverse suction fan.

[0011] As a further embodiment of this utility model: the heat dissipation fins are made of a high thermal conductivity material, and a second support frame for supporting the heat dissipation fins is provided on the base plate. Both the second support frame and the first support frame are fixedly connected to the base plate by bolts.

[0012] As a further embodiment of this utility model: the top of the reverse suction fan is provided with an air outlet, the output end of the air outlet is provided with an air outlet pipe, and the four corners of the base plate are provided with fixing screw grooves.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, the serpentine bend extends the flow path of exhaust gas within a limited space, allowing heat to be fully transferred to the bend. The heat dissipation fins efficiently conduct the heat from the bend to the air, thus cooling the exhaust gas. During reverse exhaust, the linkage shaft synchronously drives the exhaust fan to rotate. The exhaust fan accelerates the outside gas and discharges it through the exhaust hood. The end of the exhaust fan near the reverse fan has a flared structure, so when the airflow blows towards the reverse fan to accelerate the flow of gas near it for cooling, the diffused airflow blows towards the serpentine bend area, assisting the bend and heat dissipation fins in cooling, further preventing the reverse fan from overheating and extending the service life of the device. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional schematic diagram of the device in this utility model;

[0017] Figure 2 This is a top view of the device in this utility model;

[0018] Figure 3 This is a schematic diagram of the exhaust fan structure in this utility model.

[0019] In the diagram: 1. Base plate; 2. Servo motor; 3. Reverse suction fan; 4. Linkage shaft; 5. Exhaust fan; 6. Exhaust hood; 7. First support frame; 8. Air collection hood; 9. Serpentine bend; 10. Heat dissipation fins; 11. Second support frame; 12. Air outlet pipe; 13. Fixing screw groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-3 As shown, a reverse suction fan for alloy smelting includes a base plate 1;

[0022] A servo motor 2 and a reverse suction fan 3 are mounted on the upper surface of the base plate 1, and the servo motor 2 and the reverse suction fan 3 are distributed on the same center line. A shock-absorbing base is mounted at the bottom of the servo motor 2 and the reverse suction fan 3. The shock-absorbing base is fixedly connected to the base plate 1 by bolts. A linkage shaft 4 for driving the reverse suction fan 3 is mounted at the output end of the servo motor 2. An exhaust fan 5 is sleeved on the outside of the linkage shaft 4. An exhaust hood 6 is mounted on the outside of the exhaust fan 5. The exhaust hood 6 is welded from a straight cylinder and a flared cylinder. The inner diameter of the straight cylinder is equal to that of the flared cylinder. The diameter of the flared cylinder gradually increases from one end near the straight cylinder to the other, and the maximum inner diameter of the flared cylinder is larger than the diameter of the reverse suction fan 3. A first support frame 7 for supporting the exhaust hood 6 is provided on the base plate 1. An air inlet is provided on the end face of the reverse suction fan 3 away from the servo motor 2. An air collecting hood 8 is provided at the air inlet. A serpentine bend 9 is provided at the input end of the air collecting hood 8. Several sets of heat dissipation fins 10 are provided at the bottom of the serpentine bend 9. When the device is in use, the input end of the serpentine bend 9 is connected to the external exhaust gas pipe. The filtered exhaust gas passes through the serpentine bend 9. When the gas flows within the serpentine bend 9, its winding design extends the gas flow path within a limited space, allowing heat to be fully transferred to the serpentine bend 9. The serpentine bend 9 then conducts the heat to the heat dissipation fins 10, achieving efficient heat transfer and thus cooling the exhaust gas. The cooled exhaust gas then enters the reverse suction fan 3 and is discharged. The reverse suction fan 3 is driven by the servo motor 2 via the linkage shaft 4. During the rotation of the linkage shaft 4, the exhaust fan 5 is simultaneously driven to rotate. The exhaust fan 5 accelerates the external gas and discharges it through the exhaust hood 6. The end of the exhaust fan 5 near the reverse suction fan 3 has a flared structure with an inner diameter larger than that of the reverse suction fan 3. Therefore, when the airflow blows towards the reverse suction fan 3, it not only accelerates the flow of gas near the reverse suction fan 3 to cool it, but the diffused airflow also blows towards the serpentine bend 9 area, helping to cool the serpentine bend 9 and the heat dissipation fins 10, thereby further improving the overall efficiency of the device in cooling the exhaust gas.

[0023] In this embodiment, specifically, the heat dissipation fin 10 is made of a high thermal conductivity material, which can efficiently conduct heat to the serpentine bend 9, thereby ensuring heat absorption and heat dissipation efficiency. The base plate 1 is provided with a second support frame 11 for supporting the heat dissipation fin 10, which ensures the stability of the heat dissipation fin 10 and the serpentine bend 9 during use. The second support frame 11 and the first support frame 7 are both fixedly connected to the base plate 1 by bolts, which ensures the stability of the second support frame 11 and the first support frame 7.

[0024] In this embodiment, specifically, the top of the reverse suction fan 3 is provided with an air outlet, and the output end of the air outlet is provided with an air outlet pipe 12. The air outlet pipe 12 is used to discharge exhaust gas. The four corners of the base plate 1 are provided with fixing screw grooves 13. The fixing screw grooves 13 are used to install bolts, which can fix the whole device on the ground and ensure the overall stability of the device during use.

[0025] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An alloy smelting backdraft fan, comprising a base plate seat (1), characterized in that: The upper end surface of the base plate seat (1) is provided with a servo motor (2) and a backdraft fan (3), and the servo motor (2) and the backdraft fan (3) are distributed on the same center line, the output end of the servo motor (2) is provided with a linkage shaft (4) for driving the backdraft fan (3), the outer side of the linkage shaft (4) is sleeved with an exhaust fan (5), the outer side of the exhaust fan (5) is provided with an exhaust hood (6), the base plate seat (1) is provided with a first support frame (7) for supporting the exhaust hood (6), the end face of the backdraft fan (3) away from the servo motor (2) is provided with an air inlet end, the air inlet end is provided with a wind collecting hood (8), the input end of the wind collecting hood (8) is provided with a serpentine bend (9), and the bottom of the serpentine bend (9) is provided with a plurality of groups of heat dissipation fin plates (10).

2. A reverse draft fan for smelting an alloy according to claim 1, wherein The servo motor (2) and the backdraft fan (3) are provided with a damping base at the bottom, and the damping base is fixedly connected with the base plate seat (1) through bolts.

3. A reverse draft inducer for smelting alloys as claimed in claim 1, wherein The exhaust hood (6) is welded by a straight cylinder and an expanding cylinder, the inner diameters of the straight cylinders are equal, the inner diameter of the expanding cylinder gradually increases from one end close to the straight cylinder to the other end, and the maximum inner diameter of the expanding cylinder is greater than the diameter of the backdraft fan (3).

4. A reverse draft inducer for smelting alloys as claimed in claim 1, wherein The heat dissipation fin plate (10) is made of high thermal conductivity material, and the base plate seat (1) is provided with a second support frame (11) for supporting the heat dissipation fin plate (10), and the second support frame (11) and the first support frame (7) are fixedly connected with the base plate seat (1) through bolts.

5. A reverse draft inducer for smelting alloys as claimed in claim 1, wherein The top of the backdraft fan (3) is provided with an air outlet end, the output end of the air outlet end is provided with an air outlet pipe (12), and the four corners of the base plate seat (1) are provided with fixed screw grooves (13).

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