Axial flow fan for blast furnace waste gas cooling equipment

Abstract

The utility model discloses an axial flow fan for blast furnace waste gas cooling equipment, which comprises a fan outer cylinder body, an outer motor connecting seat is fixed on the top surface of a top plate of the fan outer cylinder body, a driving motor is fixed on the outer motor connecting seat, a driving wheel is fixed on an output shaft of the driving motor, an inner sleeve is arranged on the inner side wall of the fan outer cylinder body, and an outer sleeve is arranged on the inner side wall of the fan outer cylinder body. A bearing connecting base is fixed to the top face of a bottom wall plate of the inner sleeve, a supporting bearing is fixed to the bearing connecting base, and the rotating shaft is fixed to an inner ring of the supporting bearing. The driving motor is located outside the fan outer barrel, so that the driving motor is not prone to being influenced by gas exhausted from the interior, cooling water can flow into the spiral flow channel between the fan outer barrel and the inner sleeve to lower the temperature of the fan outer barrel and the temperature of the inner sleeve, the temperature of flowing-out gas is lowered, and the environment-friendly effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, and more specifically to an axial flow fan for blast furnace exhaust gas cooling equipment. Background Technology

[0002] In existing steel plants, the temperature of blast furnace exhaust gas is generally high, and the exhaust gas needs to be cooled before being discharged. Therefore, cooling equipment is generally required.

[0003] Existing cooling equipment is equipped with axial flow fans at the air outlet. The axial flow fans drive the air to flow. However, the cooled exhaust gas still has a certain temperature. When it is discharged through the axial flow fans, it affects the motor of the axial flow fans, causing the motor temperature to rise and affecting its service life. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an axial flow fan for blast furnace exhaust gas cooling equipment. It places the drive motor outside the outer cylinder of the fan, making it less susceptible to the influence of the gas discharged from inside. Moreover, the spiral flow channel between the outer cylinder and the inner sleeve of the fan can carry cooling water to reduce the temperature of the outer cylinder and the inner sleeve of the fan, thereby reducing the temperature of the outflowing gas and improving the environmental protection effect.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] An axial flow fan for blast furnace exhaust gas cooling equipment includes an outer cylinder of the fan. An external motor connecting seat is fixed on the top surface of the top plate of the outer cylinder of the fan. A drive motor is fixed on the external motor connecting seat. A drive wheel is fixed on the output shaft of the drive motor. An inner sleeve is installed on the inner side wall of the outer cylinder of the fan. A bearing connecting seat is fixed on the top surface of the bottom wall plate of the inner sleeve. A support bearing is fixed on the bearing connecting seat. A rotating shaft is fixed on the inner ring of the support bearing. The front end of the rotating shaft extends out of the support bearing and is fixed with an impeller.

[0007] A circulating cooling chamber is formed between the inner sleeve and the outer cylinder of the fan. Connectors are provided at the front and rear of the side plate of the outer cylinder of the fan, and the connectors communicate with the circulating cooling chamber.

[0008] The inner sleeve has radially extending edges on the outer walls at both the front and rear ends. The outer walls of the radially extending edges are tightly attached to the inner wall of the outer cylinder of the fan and welded in place.

[0009] A spirally extending guide plate is welded and fixed to the outer wall of the inner sleeve. The outer wall of the guide plate is close to or near the inner wall of the outer cylinder of the fan. A spiral flow channel is formed between the guide plate, the inner sleeve, and the outer cylinder of the fan. The two connectors are connected to the spiral flow channel.

[0010] The rear end of the rotating shaft extends out of the support bearing and is fixed with a transmission wheel. A first through hole is formed on the wall plate of the inner sleeve above the transmission wheel. A second through hole is formed on the top plate of the outer cylinder of the fan corresponding to the first through hole. The upper and lower ends of the guide sleeve are inserted into the corresponding first and second through holes. Its outer side wall is welded and fixed to the inner side wall of the first and second through holes. The guide sleeve is inserted at the corresponding position of the spiral flow channel. The transmission belt is inserted into the guide sleeve. Its top end extends out of the top end of the guide sleeve and is tensioned on the drive wheel. The lower part of the transmission belt extends out of the bottom end of the guide sleeve and is tensioned on the transmission wheel.

[0011] The outstanding effect of this utility model is:

[0012] It places the drive motor outside the outer cylinder of the fan, making it less susceptible to the influence of the gas discharged from inside. Furthermore, the spiral flow channel between the outer cylinder and the inner sleeve of the fan allows cooling water to pass through, thereby reducing the temperature of the outer cylinder and the inner sleeve, which in turn lowers the temperature of the outflowing gas and improves environmental protection. Attached Figure Description

[0013] Figure 1 This is a partial structural schematic diagram of the present invention;

[0014] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0015] Figure 3 yes Figure 1 A magnified view of another part. Detailed Implementation

[0016] For example, see below. Figures 1 to 3 As shown, an axial flow fan for blast furnace exhaust gas cooling equipment includes an outer cylinder 10. An outer motor connecting seat 11 is fixed on the top surface of the top plate of the outer cylinder 10. A drive motor 12 is fixed on the outer motor connecting seat 11. A drive wheel 13 is fixed on the output shaft of the drive motor 12. An inner sleeve 20 is installed on the inner side wall of the outer cylinder 10. A bearing connecting seat 21 is fixed on the top surface of the bottom wall plate of the inner sleeve 20. A support bearing 22 is fixed on the bearing connecting seat 21. A rotating shaft 23 is fixed on the inner ring of the support bearing 22. The front end of the rotating shaft 23 extends out of the support bearing 22 and is fixed with an impeller 30.

[0017] A circulating cooling chamber 1 is formed between the inner sleeve 20 and the outer cylinder 10 of the fan. Connectors 2 are connected to the front and rear of the side plate of the outer cylinder 10 of the fan, and the connectors 2 communicate with the circulating cooling chamber 1.

[0018] Furthermore, the outer side walls at both ends of the inner sleeve 20 are provided with radially extending edges 24, and the outer side walls of the radially extending edges 24 are closely attached to the inner side wall of the outer cylinder 10 of the fan and welded and fixed.

[0019] A spirally extending guide plate 25 is welded and fixed on the outer wall of the inner sleeve 20. The outer wall of the guide plate 25 is close to or near the inner wall of the outer cylinder 10 of the fan. A spiral flow channel, i.e., a circulating cooling chamber 1, is formed between the guide plate 25, the inner sleeve 20, and the outer cylinder 10 of the fan. The two connectors 2 are connected to the spiral flow channel.

[0020] When in use, the two connectors 2 are connected to the inlet and outlet water pipes respectively, so that external cooling water can enter the spiral flow channel and flow out, thereby exchanging heat and cooling the gas passing through the inner sleeve 20, ensuring that the discharged gas temperature is lower and greatly improving the environmental protection effect.

[0021] Furthermore, a connecting block 14 is fixed to the center of the bottom surface of the bottom wall panel of the outer cylinder 10 of the fan, and bent support feet 15 are fixed to the front and rear of the bottom surface of the connecting block 14. The bent support feet 15 can be used to fix this embodiment in the corresponding position.

[0022] Furthermore, the rear end of the rotating shaft 23 extends out of the support bearing 22 and is fixed with a transmission wheel 26. A first through hole 3 is formed on the wall plate of the inner sleeve 20 above the transmission wheel 26. A second through hole 4 is formed on the top plate of the outer cylinder 10 of the fan corresponding to the first through hole 3. The upper and lower ends of the guide sleeve 5 are inserted into the corresponding first through hole 3 and second through hole 4. Its outer side wall is welded and fixed to the inner side wall of the first through hole 3 and second through hole 4. The guide sleeve 5 is inserted into the corresponding position of the spiral flow channel. The transmission belt 6 is inserted into the guide sleeve 5. Its top end extends out of the top end of the guide sleeve 5 and is tensioned on the drive wheel 13. The lower part of the transmission belt 6 extends out of the bottom end of the guide sleeve 5 and is tensioned on the transmission wheel 26.

[0023] Furthermore, the bottom surface of the top plate of the inner sleeve 20 is fixed with a lower cover 7. The connecting edge on the outer side wall of the top of the lower cover 7 is fixedly connected to the bottom surface of the top wall plate of the inner sleeve 20 by bolts. The top of the lower cover 7 is connected to and aligned with the bottom of the guide sleeve 5. The rear ends of the transmission wheel 26 and the rotating shaft 23 pass through the through hole in the lower part of the wall plate of the lower cover 7 and extend into the lower cover 7.

[0024] Among them, a sleeve extending rearward is formed on the rear wall surface of the rear end plate of the outer shell of the supporting bearing 22. The sleeve is inserted into the through hole at the lower part of the wall plate of the lower cover 7. A sealing ring is clamped between its outer wall and the inner wall of the through hole, thereby providing protection for the components inside the lower cover 7.

[0025] Furthermore, an upper cover 8 is fixed to the top surface of the top plate of the outer cylinder 10 of the fan. The connecting edge formed on the bottom outer side wall of the upper cover 8 is fixed to the top surface of the top plate of the outer cylinder 10 of the fan by bolts. The bottom of the upper cover 8 is connected to and aligned with the top of the guide sleeve 5. The end of the output shaft of the drive motor 12 passes through the through hole of the front side plate of the upper cover 8 and extends into the upper cover 8 to fix the drive wheel 13.

[0026] A sealing ring is clamped between the top surface of the connecting edge of the lower cover 7 and the bottom surface of the top wall panel of the inner sleeve 20.

[0027] A sealing ring is clamped between the bottom surface of the connecting edge of the upper cover 8 and the top surface of the top plate of the outer cylinder 10 of the fan.

[0028] In this embodiment, the drive motor 12 is located externally, which makes it difficult for the temperature of the gas flowing inside to be transferred to the drive motor 12, thereby preventing the drive motor 12 from overheating and ensuring its normal operation.

[0029] Meanwhile, the cooling water flowing in its spiral flow channel exchanges heat with the gas flowing in the inner sleeve 20, which can reduce the temperature of the gas and reduce the heat transfer to the external drive motor 12, further ensuring the normal operation of the drive motor 12, reducing the temperature of the exhaust gas, reducing thermal pollution, and achieving good environmental protection effect.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-speed axial flow fan for a blast furnace exhaust gas cooling plant, comprising a fan outer cylinder (10), characterized in that: An external motor connector (11) is fixed on the top surface of the top plate of the outer cylinder (10) of the fan. A drive motor (12) is fixed on the external motor connector (11). A drive wheel (13) is fixed on the output shaft of the drive motor (12). An inner sleeve (20) is installed on the inner side wall of the outer cylinder (10). A bearing connector (21) is fixed on the top surface of the bottom wall plate of the inner sleeve (20). A support bearing (22) is fixed on the bearing connector (21). A rotating shaft (23) is fixed on the inner ring of the support bearing (22). The front end of the rotating shaft (23) extends out of the support bearing (22) and is fixed with an impeller (30). A circulating cooling chamber (1) is formed between the inner sleeve (20) and the outer cylinder (10) of the fan. The front and rear of the side plate of the outer cylinder (10) of the fan are connected to connectors (2), which are connected to the circulating cooling chamber (1).

2. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 1, characterized by: The inner sleeve (20) has radially extending edges (24) on the outer side walls at both ends. The outer side walls of the radially extending edges (24) are closely attached to the inner side wall of the outer cylinder (10) of the fan and are welded and fixed.

3. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 1, characterized by: A spirally extending guide plate (25) is welded and fixed on the outer wall of the inner sleeve (20). The outer wall of the guide plate (25) is close to or near the inner wall of the outer cylinder (10) of the fan. A spiral flow channel is formed between the guide plate (25), the inner sleeve (20), and the outer cylinder (10) of the fan. The two connectors (2) are connected to the spiral flow channel.

4. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 1, characterized by: A connecting block (14) is fixed in the middle of the bottom wall of the bottom wall panel of the outer cylinder (10) of the fan. A bent support foot (15) is fixed in the front and rear of the bottom of the connecting block (14).

5. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 1, characterized by: The rear end of the rotating shaft (23) extends out of the support bearing (22) and is fixed with a transmission wheel (26). A first through hole (3) is formed on the wall plate of the inner sleeve (20) above the transmission wheel (26). A second through hole (4) is formed on the top plate of the outer cylinder (10) of the fan corresponding to the first through hole (3). The upper and lower ends of the guide sleeve (5) are inserted into the corresponding first through hole (3) and second through hole (4). Its outer side wall is welded and fixed on the inner side wall of the first through hole (3) and second through hole (4). The guide sleeve (5) is inserted into the corresponding position of the spiral flow channel. The transmission belt (6) is inserted into the guide sleeve (5). Its top end extends out of the top end of the guide sleeve (5) and is tensioned on the drive wheel (13). The lower part of the transmission belt (6) extends out of the bottom end of the guide sleeve (5) and is tensioned on the transmission wheel (26).

6. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 5, characterized by: The bottom surface of the top plate of the inner sleeve (20) is fixed with a lower cover (7). The connecting edge on the outer side wall of the top of the lower cover (7) is fixed to the bottom surface of the top wall plate of the inner sleeve (20) by bolts. The top of the lower cover (7) is connected to and aligned with the bottom of the guide sleeve (5). The rear ends of the transmission wheel (26) and the rotating shaft (23) pass through the through hole at the bottom of the wall plate of the lower cover (7) and extend into the lower cover (7).

7. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 5, characterized by: The top surface of the top plate of the outer cylinder of the fan (10) is fixed with an upper cover (8). The connecting edge formed on the bottom outer side wall of the upper cover (8) is fixed to the top surface of the top plate of the outer cylinder of the fan (10) by bolts. The bottom of the upper cover (8) is connected to and aligned with the top of the guide sleeve (5). The end of the output shaft of the drive motor (12) passes through the through hole of the front side plate of the upper cover (8) and extends into the upper cover (8) to fix the drive wheel (13).

8. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 6, characterized by: A sealing ring is clamped between the top surface of the connecting edge of the lower cover (7) and the bottom surface of the top wall panel of the inner sleeve (20).

9. The axial flow fan for a blast furnace exhaust cooling apparatus according to claim 7, characterized by: A sealing ring is clamped between the bottom surface of the connecting edge of the upper cover (8) and the top surface of the top plate of the outer cylinder of the fan (10).

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