A tempering furnace hot air circulation system

Abstract

This application relates to the field of hot air circulation technology, and in particular to a hot air circulation system for a tempering furnace, including a tempering furnace, a duct section connected to the tempering furnace, a drive section for circulating gas within the duct section and a heating section for heating the gas within the duct section, the duct section including a hot air duct and a cold air duct, the hot air duct being connected to the air inlet of the tempering furnace and the air outlet of the heating section, the cold air duct being connected to the air outlet of the tempering furnace and the air inlet of the heating section, a cooling section being connected to the cold air duct, the drive section being disposed on the cold air duct, the gas first passing through the cooling section and then through the drive section, the hot air passing through the tempering furnace first passing through the cooling section and then through the drive section, so that the hot air is cooled down before contacting the drive section, reducing the possibility of the high temperature of the hot air affecting the drive section and causing damage to the drive section.

Description

Technical Field

[0001] This application relates to the field of hot air circulation technology, and in particular to a hot air circulation system for a tempering furnace. Background Technology

[0002] The hot air circulation system is an important component of the tempering furnace. Hot air circulates within the tempering furnace and the circulation system, resulting in high thermal efficiency. At the same time, the hot air can also be used to ensure uniform heating of the air inside the tempering furnace.

[0003] Chinese utility model patent CN206477011U discloses a hot air circulation system for a tempering furnace, comprising an inner furnace body. The inner furnace body has slots on both sides communicating with a second channel. A connecting pipe is located at the bottom of the second channel. A suction fan is located at one end of the connecting pipe within the second channel. The other end of the connecting pipe extends to the outside of an outer shell and is movably connected to one end of an insulation pipe. The other end of the insulation pipe extends into the inner cavity of a heating box. The heating box is located at the bottom of the outer shell, and the bottom of the outer shell has a first through hole communicating with the heating box. A heating plate is located at the bottom of the inner furnace body, and the heating plate has a third through hole corresponding to the second through hole. This hot air circulation system for a tempering furnace circulates the hot air generated within the inner furnace body during processing, achieving heat preservation and energy saving, and reducing energy waste.

[0004] According to the aforementioned existing technology, if the suction fan is exposed to hot air for a long time, the high temperature of the hot air will affect the suction fan and increase the possibility of damage to the suction fan. Summary of the Invention

[0005] To reduce the possibility of damage to the induced draft fan due to the high temperature of the hot air, this application provides a hot air circulation system for a tempering furnace.

[0006] The hot air circulation system for a tempering furnace provided in this application adopts the following technical solution:

[0007] A tempering furnace hot air circulation system includes a tempering furnace, with an air duct section connected to the tempering furnace. The air duct section is connected to a drive section that circulates gas within the air duct section and a heating section that heats the gas within the air duct section. The air duct section includes a hot air duct and a cold air duct. The hot air duct is connected to the air inlet of the tempering furnace and the air outlet of the heating section. The cold air duct is connected to the air outlet of the tempering furnace and the air inlet of the heating section. A cooling section is connected to the cold air duct. The drive section is disposed on the cold air duct. The gas first passes through the cooling section and then through the drive section.

[0008] By adopting the above technical solution, after the hot air passes through the tempering furnace, it first passes through the cooling section and then through the driving section, so that the hot air is cooled down before contacting the driving section, reducing the possibility of the high temperature of the hot air affecting the driving section and causing damage to the driving section.

[0009] Optionally, the cooling section includes a cooling copper pipe, one end of which is connected to a water inlet pipe, and the other end of which is connected to a water outlet pipe. Both the water inlet and outlet pipes are sealed and pass through a cold air duct. The end of the water inlet pipe away from the cooling copper pipe is connected to a water pump, and the end of the water pump away from the water inlet pipe is connected to a cooling water tank. The cooling water tank is equipped with a heat-absorbing fan and a ventilation slot, and the end of the water outlet pipe away from the cooling copper pipe is connected to the cooling water tank.

[0010] By adopting the above technical solution, water cooling can be used to stably cool down hot air, and the hot air can be cooled down quickly.

[0011] Optionally, the water pump is connected to a filter pipe at one end near the water inlet pipe, and the filter pipe is connected to the water inlet pipe at the other end away from the water pump. The filter pipe contains a filter element that can filter water.

[0012] By adopting the above technical solution, impurities will enter the cooling water tank from the ventilation slot, and the water filter pipe can filter the water in the water pipe, reducing the possibility of impurities depositing in the cooling section pipe.

[0013] Optionally, the drive unit includes an intake fan and a blower fan, with the intake fan located at the end of the cold air duct near the air outlet of the cooling section, and the blower fan located at the end of the cold air duct near the air inlet of the heating section.

[0014] By adopting the above technical solution, using both blower and suction fans to drive the air in the system simultaneously can improve the stability of gas flow and reduce the possibility of uneven gas flow.

[0015] Optionally, the heating unit includes an insulation chamber, the air outlet of which is connected to a hot air duct, and the air inlet of which is connected to a cold air duct. A heat source capable of heating gas is provided inside the insulation chamber, and the insulation chamber is covered by an insulation chamber shell. The two ends of the insulation chamber shell are respectively connected to the hot air duct and the cold air duct. An aerogel felt is provided on the side of the insulation chamber shell near the insulation chamber, and the side of the aerogel felt away from the insulation chamber shell is connected to the insulation chamber.

[0016] By adopting the above technical solution, wrapping the insulation room with aerogel felt can reduce heat loss inside the insulation room and also reduce the impact of heat sources inside the insulation room on the environment.

[0017] Optionally, the cold air duct is equipped with an anti-backflow mechanism at the end near the air outlet of the insulation chamber. The anti-backflow mechanism includes several fixed shafts, both ends of which are connected to the inner wall of the cold air duct. Each fixed shaft is fitted with and rotatably connected to a louver. The louver can swing towards the side of the insulation chamber under the action of the blower fan. When the blower fan stops working, adjacent louvers can abut against each other, and the louvers near the inner wall of the cold air duct can abut against the inner wall of the cold air duct.

[0018] By adopting the above technical solution, the inverted suction mechanism can prevent heat from entering the cold air duct and affecting the blower fan, reducing the possibility of the blower fan being damaged by high temperature.

[0019] Optionally, the walls of the hot air ducts are all embedded with aerogel felt, and several insulation boards are installed inside the hot air ducts.

[0020] By adopting the above technical solutions, the aerogel felt and insulation board inside the hot air duct can reduce the heat loss of the hot air inside the hot air duct and ensure the temperature of the hot air when it enters the tempering furnace.

[0021] Optionally, a dust removal mechanism is provided inside the cold air duct. The dust removal mechanism includes a fixed frame, and a dust removal mesh is provided inside the fixed frame.

[0022] By adopting the above technical solution, the dust removal mechanism can filter and remove impurities in the gas in the cold air duct, reducing the possibility of impurities depositing in the circulation system.

[0023] Optionally, the air duct is provided with an installation port, and there are installation threaded holes around the installation port. The fixing frame is provided with a connecting block, and there are several connecting threaded holes on the connecting block corresponding to the installation threaded holes. The fixing frame can pass through and be snapped into the installation port. The installation threaded holes and the connecting threaded holes are connected by the same screw.

[0024] By adopting the above technical solution, the dust removal mesh can be installed by the staff using screws and mounting holes, which is convenient for the staff to operate. Regularly replacing the dust removal mesh can also improve the dust removal efficiency of the dust removal mechanism.

[0025] Optionally, the inner circumferential surface of the mounting port is provided with a sealing layer, which can abut against the side of the fixed frame near the mounting port.

[0026] By adopting the above technical solution, the sealing layer is set at the connection between the fixed frame and the installation port, which can reduce the possibility of gas leakage in the circulation system.

[0027] In summary, this application includes at least one of the following beneficial effects:

[0028] 1. After passing through the tempering furnace, the hot air first passes through the cooling section and then the drive section, so that the hot air is cooled down before contacting the drive section, reducing the possibility that the high temperature of the hot air will affect the drive section and cause damage to the drive section.

[0029] 2. Dust collection mesh can be installed by staff using screws and mounting holes, making it easy for staff to operate. Regularly replacing the dust collection mesh can also improve the dust collection efficiency of the dust collection mechanism. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this application;

[0031] Figure 2This is a schematic cross-sectional view of the entire application;

[0032] Figure 3 This is an enlarged schematic diagram of the cooling section of this application;

[0033] Figure 4 This is an enlarged schematic diagram of the anti-backflow mechanism of this application;

[0034] Figure 5 This is an enlarged schematic diagram of the dust removal mechanism in this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Tempering furnace; 2. Air duct section; 21. Hot air duct; 22. Cold air duct; 3. Drive section; 31. Suction fan; 32. Blowing fan; 4. Heating section; 41. Insulation chamber; 42. Heat source; 43. Insulation chamber shell; 5. Cooling section; 51. Cooling copper pipe; 52. Water inlet pipe; 53. Water outlet pipe; 54. Water pump; 55. Cooling water tank; 56. Heat absorption fan; 57. Ventilation slot; 6. Water filter pipe; 61. Filter element; 7. Dust removal mechanism; 71. Fixing frame; 72. Dust removal mesh; 73. Connecting block; 74. Connecting threaded hole; 8. Mounting port; 81. Mounting threaded hole; 82. Screw; 83. Sealing layer; 9. Aerogel felt; 10. Anti-backflow mechanism; 11. Fixing shaft; 12. Louver; 13. Insulation board. Detailed Implementation

[0037] The embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0038] This embodiment provides a tempering furnace hot air circulation system, combined with Figure 1 and Figure 2The system includes a tempering furnace 1, with a duct section 2 connected to the furnace 1. The duct section 2 includes a hot air duct 21 and a cold air duct 22, both connected to the tempering furnace 1 and to the same heating section 4 capable of heating gas. One end of the hot air duct 21 is connected to the outlet of the heating section 4, and the end of the hot air duct 21 away from the heating section 4 is connected to the inlet of the tempering furnace 1. One end of the cold air duct 22 is connected to the inlet of the heating section 4, and the end of the cold air duct 22 away from the heating section 4 is connected to the outlet of the tempering furnace. The cold air duct 22 is equipped with a cooling section 5 to cool the hot air. The pipe 22 is equipped with a drive unit 3 that can drive the gas flow in the air duct section 2. The drive unit 3 includes a suction fan 31 and a blower fan 32. The suction fan 31 is fixedly connected to the inner wall of the cold air pipe 22 near the air outlet of the cooling section 5. The blower fan 32 is fixedly connected to the inner wall of the cold air pipe 22 near the air inlet of the heating section 4. Hot air enters the tempering furnace 1 from the heating section 4 through the hot air pipe 21, and then passes through the cooling section 5 from the tempering furnace 1. The hot air is cooled down by the cooling section 5 and then passes through the suction fan 31 and the blower fan 32, which can reduce the possibility of the high temperature brought by the hot air damaging the suction fan 31 and the blower fan 32.

[0039] Combination Figure 2 and Figure 3 The cooling section 5 includes a cooling copper pipe 51, which is fixedly connected to the inner wall of the cooling air duct 22. One end of the cooling copper pipe 51 is connected to a water inlet pipe 52, and the other end of the cooling copper pipe 51 away from the water inlet pipe 52 is connected to a water outlet pipe 53. The other end of the water outlet pipe 53 away from the cooling copper pipe 51 is connected to a cooling water tank 55. A heat-absorbing fan 56 is fixedly connected inside the cooling water tank 55. Several ventilation slots 57 are provided on the end of the cooling water tank 55 near the air duct section 2. The heat-absorbing fan 56 is fixedly connected to the inner wall of the cooling water tank 55 on the side near the air duct section 2. A water pump 54 is connected to the end of the cooling water tank 55 away from the water outlet pipe 53. The water pump 54 is located away from the cooling water... One end of the tank 55 is connected to a water filter pipe 6, and a filter element 61 that can filter water is fixedly connected inside the water filter pipe 6. The end of the water filter pipe 6 away from the water pump 54 is connected to the water inlet pipe 52. The low-temperature water in the cooling water tank 55 is filtered by the filter element 61 in the water filter pipe 6 through the action of the water pump 54 and then flows into the cooling copper pipe 51 through the water inlet pipe 52, taking away some of the heat from the hot air passing through the cooling section 5. Finally, it flows into the cooling water tank through the water outlet pipe 53 and dissipates heat through the heat absorption fan 56 and the ventilation slot 57, which can effectively cool the hot air. In addition, the filter element 61 can filter the water in the water inlet pipe, reducing the possibility of impurities in the water depositing in the pipe and tank.

[0040] Combination Figure 2 and Figure 4The heating unit 4 includes an insulation chamber 41. The air outlet of the insulation chamber 41 is connected to the hot air duct 21, and the air inlet of the insulation chamber 41 is connected to the cold air duct 22. A heat source 42 capable of heating gas is provided inside the insulation chamber 41. The four sides of the insulation chamber 41 perpendicular to the hot air duct 21 are covered with aerogel felt 9. The sides of the aerogel felt 9 away from the insulation chamber 41 are covered with an insulation chamber shell 43. The aerogel felt 9 can reduce heat loss inside the insulation chamber 41 and also reduce the impact of high temperature on the environment around the heating unit 4. Aerogel felt 9 is also embedded in the wall of the hot air duct 21. An insulation board 13 is fixedly connected to the inner wall of the hot air duct 21. The aerogel felt 9 and the insulation board 13 can reduce the heat of the hot air inside the hot air duct 21. To prevent backflow, the cold air duct 22 is equipped with an anti-backflow mechanism 10 at the end near the air outlet of the insulation chamber 41. The anti-backflow mechanism 10 includes several fixed shafts 11, both ends of which are fixedly connected to the inner wall of the cold air duct 22. Each fixed shaft 11 is fitted with a louver 12. The louver 12 can rotate towards the heating part 4 under the action of the blower fan 32. When the blower fan 32 is not working, two adjacent louvers 12 can abut against each other. The louver 12 near the inner wall of the cold air duct 22 can abut against the inner wall of the cold air duct 22. The anti-backflow mechanism 10 can reduce the possibility of heat flowing back into the cold air duct 22 from the heating part 4 and reduce the possibility of high temperature affecting the drive part 3 inside the cold air duct 22.

[0041] Combination Figure 5 The cold air duct 22 is equipped with a dust removal mechanism 7, which includes a fixed frame 71. A dust removal mesh 72 is fixedly connected inside the fixed frame 71. An installation port 8 is provided on the cold air duct 22. The fixed frame 71 can be installed inside the cold air duct 22 through the installation port 8. The fixed frame 71 can be snapped into the installation port 8. There are installation threaded holes 81 around the installation port 8. A connecting block 73 is fixedly connected to the fixed frame 71. The connecting block 73 has a connecting threaded hole 74 corresponding to the installation threaded hole 81. The same screw 82 is threaded into the installation threaded hole 81 and the connecting threaded hole 74. A sealing layer 83 is fixedly connected around the installation port 8. The side of the connecting block 73 near the cold air duct 22 can abut against the sealing layer 83. The screw 82 passes through the sealing layer 83. The operator can fix the fixed frame 71 to the cold air duct 22 through the installation threaded hole 81, the connecting threaded hole 74 and the screw 82, which is convenient for the operator to replace and install the fixed frame 71.

[0042] The method of using this application is as follows: The fixed frame 71 is installed in the cold air pipe 22 through the mounting threaded hole 81, the connecting threaded hole 74 and the screw 82. Then, the material to be tempered is put into the tempering furnace 1. The water pump 54 in the cooling section 5 is started to make the cooling water flow in the cooling section 5. Then, the heat source 42 in the heating section 4 is turned on to heat the gas in the heating section 4. Then, the drive section 3 is turned on to make the hot air circulate in the device. The hot air passes through the cooling copper pipe 51 and the cooling water in the cooling copper pipe 51 will take away some of the heat, so that the hot air is cooled down and then enters the cold air pipe 22 and contacts the drive section 3. The cooled hot air is then driven by the drive section 3 to re-enter the heating section 4 to be heated. The heated hot air returns to the tempering furnace 1 to realize the hot air circulation.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Users may make various modifications and variations to this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hot air circulation system for a tempering furnace, characterized in that: The system includes a tempering furnace (1), a duct section (2) connected to the tempering furnace (1), a drive section (3) for circulating gas within the duct section (2), and a heating section (4) for heating the gas within the duct section (2). The duct section (2) is characterized by comprising a hot air duct (21) and a cold air duct (22). The hot air duct (21) is connected to the air inlet of the tempering furnace (1) and the air outlet of the heating section (4). The cold air duct (22) is connected to the air outlet of the tempering furnace (1) and the air inlet of the heating section (4). A cooling section (5) is connected to the cold air duct (22). The drive section (3) is mounted on the cold air duct (22). Gas first passes through the cooling section (5). 5) Then through the drive unit (3); the cold air duct (22) is provided with a dust removal mechanism (7), the dust removal mechanism (7) includes a fixed frame (71), the fixed frame (71) is provided with a dust removal mesh (72); the cold air duct (22) is provided with an installation port (8), the installation port (8) is provided with an installation threaded hole (81) around it, the fixed frame (71) is provided with a connecting block (73), the connecting block (73) is provided with a number of connecting threaded holes (74) corresponding to the installation threaded hole (81), the fixed frame (71) can pass through and be snapped into the installation port (8), the installation threaded hole (81) and the connecting threaded hole (74) are threaded with the same screw (82).

2. The hot air circulation system for a tempering furnace according to claim 1, characterized in that: The cooling section (5) includes a cooling copper pipe (51), one end of which is connected to a water inlet pipe (52), and the other end of which is connected to a water outlet pipe (53). Both the water inlet pipe (52) and the water outlet pipe (53) are sealed and pass through a cold air duct (22). The other end of the water inlet pipe (52) is connected to a water pump (54), and the other end of the water pump (54) is connected to a cooling water tank (55). The cooling water tank (55) is equipped with a heat-absorbing fan (56) and a ventilation slot (57). The other end of the water outlet pipe (53) is connected to the cooling water tank (55).

3. The hot air circulation system for a tempering furnace according to claim 2, characterized in that: The water pump (54) has a filter pipe (6) connected to one end near the water inlet pipe (52), and the filter pipe (6) is connected to the water inlet pipe (52) at the other end away from the water pump (54). The filter pipe (6) is equipped with a filter element (61) that can filter water.

4. The hot air circulation system for a tempering furnace according to claim 3, characterized in that: The drive unit (3) includes a suction fan (31) and a blower fan (32). The suction fan (31) is located at the end of the cold air pipe (22) near the air outlet of the cooling unit (5), and the blower fan (32) is located at the end of the cold air pipe (22) near the air inlet of the heating unit (4).

5. A tempering furnace hot air circulation system according to claim 4, characterized in that: The heating part (4) includes a heat insulation chamber (41), the air outlet of the heat insulation chamber (41) is connected to the hot air pipe (21), the air inlet of the heat insulation chamber (41) is connected to the cold air pipe (22), a heat source (42) capable of heating gas is provided inside the heat insulation chamber (41), the heat insulation chamber (41) is covered with a heat insulation chamber shell (43), the two ends of the heat insulation chamber shell (43) are respectively connected to the hot air pipe (21) and the cold air pipe (22), an aerogel felt (9) is provided on the side of the heat insulation chamber shell (43) close to the heat insulation chamber (41), and the side of the aerogel felt (9) away from the heat insulation chamber shell (43) is connected to the heat insulation chamber (41).

6. The hot air circulation system for a tempering furnace according to claim 5, characterized in that: The cold air duct (22) is provided with an anti-backflow mechanism (10) at one end near the air outlet of the insulation chamber (41). The anti-backflow mechanism (10) includes several fixed shafts (11). Both ends of the fixed shafts (11) are connected to the inner wall of the cold air duct (22). Each fixed shaft (11) is fitted with and rotatably connected with a louver (12). The louver (12) can swing towards the side of the insulation chamber (41) under the action of the blower fan (32). When the blower fan (32) stops working, adjacent louvers (12) can abut against each other. The louver (12) near the inner wall of the cold air duct (22) can abut against the inner wall of the cold air duct (22).

7. A tempering furnace hot air circulation system according to claim 6, characterized in that: The hot air pipe (21) is embedded with aerogel felt (9) in its wall thickness, and a number of insulation boards (13) are provided inside the hot air pipe (21).

8. The hot air circulation system for a tempering furnace according to claim 1, characterized in that: The inner circumferential surface of the mounting port (8) is provided with a sealing layer (83), which can abut against the side of the fixed frame (71) near the mounting port (8).

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