A furnace uniform temperature fan nitrogen cooling structure

Abstract

The utility model provides a kind of nitrogen cooling structure of even temperature fan for furnace, including heating furnace, even temperature fan, nitrogen gas inlet main pipeline, nitrogen gas outlet main pipeline;Even temperature fan is connected in the top of heating furnace, even temperature fan is connected with nitrogen gas inlet main pipeline, even temperature fan is connected with nitrogen gas outlet main pipeline;It can be realized that process nitrogen gas is passed into heating furnace by even temperature fan through gas distribution frame, effectively solve the heat dissipation problem of even temperature fan, and realize nitrogen recycling.

Description

Technical Field

[0001] This utility model belongs to the field of heat treatment technology, and in particular to a nitrogen cooling structure for a furnace uniform temperature fan. Background Technology

[0002] During normal processing of workpieces, the temperature inside heat treatment quenching furnaces and carburizing furnaces is 820-950°C. To ensure uniform temperature and even heating of the workpieces, a temperature equalization fan system is typically installed. However, this temperature equalization fan is very prone to damage during use because it is in direct contact with the furnace interior. At high temperatures, the lubricating oil in the bearings deteriorates, causing the steel balls to malfunction and ultimately damaging the bearings. Motor coils are also prone to burnout at high temperatures, and the motor shaft can deform under high temperatures, failing to meet the required concentricity. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a nitrogen cooling structure for a furnace heat exchanger fan, which enables process nitrogen through the gas distribution frame to be introduced into the heating furnace through the heat exchanger fan, effectively solving the heat dissipation problem of the heat exchanger fan, and realizing the reuse of nitrogen.

[0004] To achieve some or all of the above objectives or other objectives, this application provides the following technical solutions:

[0005] Furthermore, the temperature equalization fan includes a motor, a shaft, a housing, a bearing assembly, a cooling jacket, an insulation layer, fan blades, a nitrogen inlet pipe branch, and a nitrogen outlet pipe branch; one end of the shaft is connected to the motor, and the other end of the shaft is connected to the fan blades; the bearing assembly, cooling jacket, and insulation layer are sequentially mounted on the shaft, and the bearing assembly is positioned close to the motor; the bearing assembly and cooling jacket are located inside the housing; the main nitrogen inlet pipe is connected to the cooling jacket through a nitrogen inlet pipe branch, and the main nitrogen outlet pipe is connected to the cooling jacket through a nitrogen outlet pipe branch.

[0006] Furthermore, the cooling interlayer is a sealed interlayer, and the insulation layer is made of insulation cotton.

[0007] Furthermore, the temperature equalization fan also includes an L-shaped pipe and a lubricating oil cup; the bearing assembly is connected to the lubricating oil cup via the L-shaped pipe.

[0008] Furthermore, the temperature equalization fan also includes a beveled pin; the shaft and the fan blades are rigidly connected by the beveled pin.

[0009] Furthermore, it also includes a flange; the heating furnace is connected to the outer shell via the flange, and the outer circumferential surface of the outer shell is provided with an annular boss, and the annular boss is provided with a threaded hole that matches the flange.

[0010] Furthermore, there are five temperature equalization fans, which are connected in parallel.

[0011] Furthermore, an inlet pressure gauge and an inlet pressure detection switch are installed on the nitrogen inlet main pipe, and an outlet pressure gauge and an outlet pressure detection switch are installed on the nitrogen outlet main pipe.

[0012] Furthermore, it also includes a through-beam grating, which includes a transmitter and a receiver; the furnace wall of the heating furnace has multiple through holes, and the transmitter and receiver are connected to the outer surface of the furnace wall through the through holes, with the transmitter and receiver positioned on corresponding sides of the furnace wall.

[0013] Furthermore, it also includes five thermocouples; the thermocouples are mounted on the heating furnace and are positioned near the temperature equalization fan.

[0014] Compared with existing technologies, the beneficial effects of this invention are: It utilizes process nitrogen to actively cool the temperature-equalizing fan, solving the heat dissipation problem of fan bearings, motors, and other components under high-temperature conditions; the cooled high-temperature nitrogen is directly introduced into the heating furnace for reuse, avoiding nitrogen waste and significantly reducing process gas costs. By using process nitrogen as a medium, the "cooling function" and "gas reuse" are deeply integrated, overcoming the problem of high-temperature fan failure while achieving zero resource waste, providing a highly reliable and low-cost solution for high-temperature heat treatment equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a temperature equalization fan;

[0016] Figure 2 This is a top view of the temperature equalization fan;

[0017] Figure 3 This is a schematic diagram of the L-shaped pipeline and the lubricating oil cup.

[0018] Figure 4 This is a schematic diagram of the structure of this utility model;

[0019] Figure 5 This is a top view of the present invention;

[0020] Figure 6 This is the right view of the present invention;

[0021] In the diagram: 1. Motor; 2. Shaft; 3. Bearing assembly; 4. Cooling jacket; 5. Insulation layer; 6. Fan blade; 7. Nitrogen inlet branch; 8. Nitrogen outlet branch; 9. L-shaped pipe; 10. Lubricating oil cup; 11. Angled pin; 12. Heating furnace; 13. Temperature equalizing fan; 14. Nitrogen inlet main pipe; 15. Nitrogen outlet main pipe; 16. Outer casing; 1601. Annular boss; 17. Inlet pressure gauge; 18. Inlet pressure detection switch; 20. Outlet pressure gauge; 21. Outlet pressure detection switch; 23. Transmitter; 24. Receiver; 25. Thermocouple. Detailed Implementation

[0022] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] See appendix Figure 1-6 A nitrogen cooling structure for a furnace with a uniform temperature fan includes a heating furnace 12, a uniform temperature fan 13, a nitrogen inlet main pipe 14, and a nitrogen outlet main pipe 15; the uniform temperature fan 13 is connected to the top of the heating furnace 12, the uniform temperature fan 13 is connected to the nitrogen inlet main pipe 14, and the uniform temperature fan 13 is connected to the nitrogen outlet main pipe 15.

[0024] The temperature equalization fan 13 includes a motor 1, a shaft 2, a housing 16, a bearing assembly 3, a cooling jacket 4, an insulation layer 5, fan blades 6, a nitrogen inlet branch line 7, and a nitrogen outlet branch line 8. One end of the shaft 2 is connected to the motor 1, and the other end is connected to the fan blades 6. The bearing assembly 3, cooling jacket 4, and insulation layer 5 are sequentially mounted on the shaft 2, with the bearing assembly 3 positioned close to the motor 1. The bearing assembly 3 and cooling jacket 4 are located inside the housing 16. The main nitrogen inlet pipe 14 is connected to the cooling jacket 4 via the nitrogen inlet branch line 7, and the main nitrogen outlet pipe 15 is connected to the cooling jacket 4 via the nitrogen outlet branch line 8. Each branch line of the nitrogen inlet branch line 7 and the nitrogen outlet branch line 8 has a manual valve.

[0025] The cooling jacket 4 is a sealed jacket, and the insulation layer 5 is made of insulation cotton. Low-temperature nitrogen is introduced into the sealed cooling jacket to ensure that the bearing assembly is within a safe temperature range. The insulation layer 5 is made of insulation cotton, which effectively isolates the heat radiation inside the furnace and reduces the risk of high-temperature burnout of the motor 1 coil. The cooling jacket 4 and the insulation layer 5 work together to suppress the thermal deformation of the shaft 2 and ensure the concentricity of the shaft system.

[0026] The temperature-equalizing fan 13 also includes an L-shaped pipe 9 and a lubricating oil cup 10; the bearing assembly 3 is connected to the lubricating oil cup 10 through the L-shaped pipe 9. The independent lubricating oil cup 10 continuously supplies oil to the bearing through the L-shaped pipe 9 to prevent the lubricating oil from deteriorating at high temperatures and to avoid the bearing from seizing.

[0027] The temperature equalization fan 13 also includes a beveled pin 11; the rotating shaft 2 and the fan blade 6 are rigidly connected by the beveled pin 11 to prevent them from loosening and falling off under high-speed rotation.

[0028] It also includes a flange; the heating furnace 12 is connected to the outer shell 16 via the flange, and the outer circumferential surface of the outer shell 16 is provided with an annular boss 1601, and the annular boss 1601 is provided with a threaded hole that matches the flange. The heating furnace 12 is welded to the flange; the outer shell 16 is detachably connected to the heating furnace 12 via the flange, and the design of the annular boss 1601 and the threaded hole ensures stable installation and easy maintenance.

[0029] There are five temperature equalization fans 13, which are connected in parallel. The parallel design of multiple temperature equalization fans improves the temperature uniformity inside the furnace, while the branch valves support independent control of each fan.

[0030] The nitrogen inlet main pipeline 14 is equipped with an inlet pressure gauge 17 and an inlet pressure detection switch 18, while the nitrogen outlet main pipeline 15 is equipped with an outlet pressure gauge 20 and an outlet pressure detection switch 21. This enables real-time monitoring and precise adjustment of flow rate and pressure. Each nitrogen inlet branch 7 and nitrogen outlet branch 8 is equipped with a manual valve for easy flow rate adjustment.

[0031] It also includes a through-beam grating, which comprises a transmitter 23 and a receiver 24. Multiple through holes are formed in the furnace wall of the heating furnace 12, and the transmitter 23 and receiver 24 are connected to the outer surface of the furnace wall through these through holes. The transmitter 23 and receiver 24 are positioned on corresponding sides of the furnace wall. The through-beam grating is connected to various pipelines, and each pipeline connected to the through-beam grating is equipped with a flow meter and a manual valve to adjust the flow rate. There are thirteen sets of through-beam gratings, which are installed across the furnace wall (transmitter 23 / receiver 24) to monitor the operation status of the pipelines and fans in real time, triggering an alarm in case of abnormality.

[0032] It also includes thermocouples 25, of which there are five, one near each of the heat equalization fans; the thermocouples 25 are installed on the heating furnace 12, and the thermocouples 25 are placed close to the heat equalization fans 13 to prevent local overheating; the thermocouples 25 are used to measure the actual temperature inside the heating furnace.

[0033] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A nitrogen-cooled structure for a furnace heat exchanger fan, characterized in that: It includes a heating furnace (12), a temperature equalization fan (13), a nitrogen inlet main pipe (14), and a nitrogen outlet main pipe (15); the temperature equalization fan (13) is connected to the top of the heating furnace (12), the temperature equalization fan (13) is connected to the nitrogen inlet main pipe (14), and the temperature equalization fan (13) is connected to the nitrogen outlet main pipe (15).

2. The nitrogen-cooled structure for a furnace uniform temperature fan according to claim 1, characterized in that: The temperature equalization fan (13) includes a motor (1), a shaft (2), a housing (16), a bearing assembly (3), a cooling jacket (4), an insulation layer (5), a fan blade (6), a nitrogen inlet pipe branch (7), and a nitrogen outlet pipe branch (8); one end of the shaft (2) is connected to the motor (1), and the other end of the shaft (2) is connected to the fan blade (6). The bearing assembly (3), the cooling jacket (4), and the insulation layer (5) are sequentially mounted on the shaft (2). The bearing assembly (3) is located close to the motor (1). The bearing assembly (3) and the cooling jacket (4) are located inside the housing (16). The nitrogen inlet main pipe (14) is connected to the cooling jacket (4) through the nitrogen inlet pipe branch (7), and the nitrogen outlet main pipe (15) is connected to the cooling jacket (4) through the nitrogen outlet pipe branch (8).

3. The nitrogen-cooled structure for a furnace uniform temperature fan according to claim 2, characterized in that: The cooling interlayer (4) is a sealed interlayer, and the insulation layer (5) is made of insulation cotton.

4. The nitrogen-cooled structure for a furnace uniform temperature fan according to claim 2, characterized in that: The temperature equalization fan (13) also includes an L-shaped pipe (9) and a lubricating oil cup (10); the bearing assembly (3) is connected to the lubricating oil cup (10) through the L-shaped pipe (9).

5. The nitrogen-cooled structure for a furnace uniform temperature fan according to claim 2, characterized in that: The temperature equalization fan (13) also includes a bevel pin (11); the shaft (2) and the fan blade (6) are rigidly connected by the bevel pin (11).

6. The nitrogen-cooled structure for a furnace uniform temperature fan according to claim 2, characterized in that: It also includes a flange; the heating furnace (12) is connected to the outer shell (16) through the flange, and the outer circumferential surface of the outer shell (16) is provided with an annular boss (1601), and the annular boss (1601) is provided with a threaded hole that matches the flange.

7. The nitrogen-cooled structure for a furnace heat exchanger fan according to claim 1, characterized in that: There are five temperature equalization fans (13), and the five temperature equalization fans (13) are arranged in parallel.

8. The nitrogen-cooled structure for a furnace heat exchanger fan according to claim 1, characterized in that: An inlet pressure gauge (17) and an inlet pressure detection switch (18) are installed on the nitrogen inlet main pipeline (14), and an outlet pressure gauge (20) and an outlet pressure detection switch (21) are installed on the nitrogen outlet main pipeline (15).

9. A nitrogen-cooled structure for a furnace uniform temperature fan according to claim 1, characterized in that: It also includes a through-beam grating, which includes a transmitter (23) and a receiver (24); the furnace wall of the heating furnace (12) has multiple through holes, and the transmitter (23) and receiver (24) are connected to the outer surface of the furnace wall of the heating furnace (12) through the through holes. The transmitter (23) and receiver (24) are arranged on the corresponding sides of the furnace wall of the heating furnace (12).

10. A nitrogen-cooled structure for a furnace uniform temperature fan according to claim 1, characterized in that: It also includes thermocouples (25), of which there are five; the thermocouples (25) are set on the heating furnace (12) and the thermocouples (25) are set near the temperature equalization fan (13).

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