Fan for conveying corrosive gas

Abstract

The invention relates to a fan for conveying corrosive gas, and relates to the technical field of fans, the fan comprises a support, a machine shell is arranged at one end of the support in the length direction, an air inlet and an air outlet are formed in the machine shell, a driving motor is arranged on the support, an impeller is rotationally arranged in the machine shell, and a transmission assembly is arranged between the driving motor and the machine shell; the transmission assembly extends into the machine shell and is used for being connected with an output shaft of the driving motor and the impeller. When the fan is driven to work, the transmission assembly extends into the machine shell, an output shaft of the driving motor is not corroded, the output shaft of the driving motor is not influenced by corrosive gas in the machine shell, if problems occur in the running period of the fan, only the transmission assembly needs to be replaced, replacement is convenient, and the cost is reduced. The transmission assembly can be replaced without waiting for cooling of the driving motor, and convenience is high.

Description

Technical Field

[0001] The invention relates to the technical field of fans, and in particular to a fan for conveying corrosive gases. Background Art

[0002] A fan is a device that converts mechanical energy into gas kinetic energy. It uses the rotation of blades to generate airflow, thereby achieving functions such as ventilation, exhaust, cooling, and material transportation.

[0003] For fans that transport corrosive gases, in order to increase the service life of the fans, the fans need to have corrosion-resistant materials, good sealing performance and stable operation capabilities to ensure that the corrosive gases do not leak and protect the environment and the safety of workers.

[0004] With respect to the above-mentioned related technologies, in the existing fans that convey corrosive gases, the motor is usually close to the casing, and a sealing assembly is usually arranged on the casing to seal the casing, thereby reducing the leakage of corrosive gases to the outside. Then a sealing cover is placed on the outer cover of the motor to reduce corrosion to the motor. However, since the output shaft of the motor extends to the outside of the sealing cover and extends into the casing to drive the impeller, the output shaft of the motor will also be corroded. Over time, the output shaft of the motor will be unable to drive the impeller to rotate. If a problem occurs with the output shaft during motor operation, the motor and the output shaft will be hot, making it difficult for the staff to replace them. The staff need to stop the machine and wait for the motor and the output shaft to cool down before replacing them, which is less convenient. Summary of the invention

[0005] In order to solve the above problems, the present application provides a blower for conveying corrosive gases.

[0006] The present application provides a blower for conveying corrosive gas, which adopts the following technical solution: A fan for conveying corrosive gas comprises a bracket, a casing is arranged at one end of the bracket in the length direction, the casing is provided with an air inlet and an air outlet, a driving motor is arranged on the bracket, an impeller rotates in the casing, a transmission assembly is arranged between the driving motor and the casing, the transmission assembly extends into the interior of the casing, and is used to connect the output shaft of the driving motor and the impeller.

[0007] By adopting the above technical solution, when the fan is driven to work, the transmission component is extended into the interior of the casing. It is not the output shaft of the drive motor that is corroded, and the output shaft of the drive motor will not be affected by the corrosive gas in the casing. If a problem occurs during the operation of the fan, the transmission component can be replaced. The replacement is easy and there is no need to wait for the drive motor to cool down before replacing the transmission component, which is very convenient.

[0008] Optionally, the transmission assembly includes a transmission seat, a transmission shaft rotating inside the transmission seat, bearings are provided at both ends of the transmission seat in the length direction, the outer rings of the two bearings are fixedly connected to the transmission seat, the transmission shaft is fixedly connected to the inner ring of the bearing, one end of the transmission shaft in the length direction is detachably connected to the output shaft of the driving motor, the transmission assembly also includes an extension shaft, the extension shaft is detachably connected to the other end of the transmission shaft in the length direction, and the extension shaft extends to the inside of the casing and is detachably connected to the impeller.

[0009] By adopting the above technical solution, the transmission shaft can be driven to rotate by operating the output shaft of the driving motor, and then the insertion shaft can be driven to rotate, and then the impeller can be driven to rotate. The structure is simple and the driving is convenient. The bearings provided can reduce the wear caused by the rotation of the transmission shaft, thereby increasing the service life of the transmission shaft. During the operation of the fan, if the insertion shaft is affected by corrosive gases during long-term use and cannot be used normally, the staff can replace the insertion shaft. The structure is simple, the replacement is convenient, and the convenience is high.

[0010] Optionally, the impeller includes a wheel disc, a plurality of main blades are evenly spaced apart on a side of the wheel disc away from the transmission seat, an insertion shaft passes through the wheel disc and is key-connected to the wheel disc, the insertion shaft is detachably connected (bolted) with a shaft cover, and the shaft cover is located on a side of the wheel disc away from the drive motor.

[0011] By adopting the above technical solution, the connection between the insertion shaft and the wheel disc is relatively simple and the replacement is relatively convenient. When replacing, the shaft cover is disconnected from the insertion shaft, and then the wheel disc and the insertion shaft are moved away from each other, which makes disassembly and replacement relatively convenient.

[0012] Optionally, the air outlet is opened at the upper end of the casing, and when the insertion shaft is connected to the wheel disc, a plurality of main blades are arranged at equal intervals in the circumference of the insertion shaft, and the ends of the plurality of main blades away from the shaft cover are all arc-shaped.

[0013] By adopting the above technical solution, when the fan is running, the wind direction of the corrosive gas is driven by the main blades, and the corrosive gas is driven toward the air outlet, so the efficiency of conveying the corrosive gas is higher.

[0014] Optionally, a plurality of auxiliary blades are arranged at equal intervals on one side of the wheel disc close to the transmission seat, and when the insertion shaft is connected to the wheel disc, the plurality of auxiliary blades are arranged at equal intervals in the circumference of the insertion shaft.

[0015] By adopting the above technical solution, when the fan is running, the auxiliary blades rotate with the rotation of the main blades. As the auxiliary blades rotate, the gas outside the casing can be sucked into the inside of the casing, thereby reducing the leakage of corrosive gases in the casing.

[0016] Optionally, a negative pressure ring is provided inside the casing, the negative pressure ring is located between the casing and the wheel disc, and the negative pressure ring is provided on a side of the wheel disc away from the main blades.

[0017] By adopting the above technical solution, when the auxiliary blades rotate, the negative pressure ring can increase the negative pressure generated when the auxiliary blades rotate, thereby increasing the strength of external gas suction and further reducing the occurrence of corrosive gas leakage to the outside of the casing.

[0018] Optionally, the diameter of the wheel disc is larger than the diameter of the negative pressure ring, a sleeve ring extends from one side of the wheel disc close to the negative pressure ring, the sleeve ring covers the outside of the negative pressure ring, and an air outlet is formed between the sleeve ring and the negative pressure ring.

[0019] By adopting the above technical solution, the negative pressure generated when the auxiliary blades rotate is further increased by setting the collar; and the collar will also rotate when the wheel rotates. When the wheel rotates at high speed, the collar can generate centrifugal force, further sucking external air into the interior of the casing, reducing the occurrence of corrosive gas leakage to the outside of the casing.

[0020] Optionally, a wind cutting plate is fixedly connected to one side of the auxiliary blade in the length direction, and the wind cutting plate is obliquely arranged on the side of the auxiliary blade away from the wheel disc.

[0021] By adopting the above technical solution, as the auxiliary blades rotate, a number of wind cutting plates are driven to move, thereby disturbing the gas around the wind cutting plates, increasing the negative pressure in the casing, and making the gas outside the casing tend to flow into the casing, thereby reducing the leakage of corrosive gases in the casing.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the fan is driven to work, the transmission component is extended into the interior of the casing. It is not the output shaft of the drive motor that is corroded. The output shaft of the drive motor will not be affected by the corrosive gas in the casing. If a problem occurs during the operation of the fan, the transmission component can be replaced. The replacement is convenient and there is no need to wait for the drive motor to cool down before replacing the transmission component. It is very convenient. 2. By operating the output shaft of the driving motor to rotate, the transmission shaft can be driven to rotate, and then the insertion shaft can be driven to rotate, and then the impeller can be driven to rotate. The structure is simple and the drive is convenient. The bearings provided can reduce the wear caused by the rotation of the transmission shaft, thereby increasing the service life of the transmission shaft. During the operation of the fan, if the insertion shaft is affected by corrosive gases during long-term use and cannot be used normally, the staff can replace the insertion shaft. The structure is simple, the replacement is convenient, and the convenience is high. 3. The connection between the insertion shaft and the wheel disc is relatively simple, and it is convenient to replace. When replacing, the shaft cover is disconnected from the insertion shaft, and then the wheel disc and the insertion shaft are moved away from each other. It is convenient to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of the first embodiment.

[0024] Figure 2 It is a schematic diagram highlighting the housing in the first embodiment.

[0025] Figure 3 It is a schematic diagram highlighting the main blade in the first embodiment.

[0026] Figure 4 It is a schematic diagram highlighting the impeller in the first embodiment.

[0027] Figure 5 It is a cross-sectional schematic diagram of the second embodiment.

[0028] Figure 6 yes Figure 5 Enlarged schematic diagram of part A.

[0029] Figure 7 It is a cross-sectional schematic diagram of the third embodiment.

[0030] Figure 8 yes Figure 7 Schematic diagram of the enlarged portion B.

[0031] Fig. 9 It is a cross-sectional schematic diagram of the fourth embodiment.

[0032] Fig.10 It is a schematic diagram highlighting the auxiliary blades in the fourth embodiment.

[0033] Fig.11 It is a schematic diagram highlighting the wind cutting plate in the fourth embodiment.

[0034] Explanation of the accompanying drawings: 1. bracket; 11. driving motor; 2. casing; 21. air inlet; 22. air outlet; 23. impeller; 24. wheel disc; 241. main blade; 242. windward part; 243. auxiliary blade; 3. transmission seat; 31. transmission shaft; 32. bearing; 4. insertion shaft; 5. negative pressure ring; 6. sleeve ring; 7. wind cutting plate; 8. shaft cover. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0036] The embodiment of the present application discloses a fan for conveying corrosive gas.

[0037] Embodiment 1: Reference Figure 1 and Figure 2 A fan for conveying corrosive gas comprises a bracket 1, a casing 2 is arranged at one end in the length direction of the bracket 1, the casing 2 is provided with an air inlet 21 and an air outlet 22, a driving motor 11 is arranged on the bracket 1, an impeller 23 rotates in the casing 2, a transmission component is arranged between the driving motor 11 and the casing 2, the transmission component extends into the interior of the casing 2, and is used to connect the output shaft of the driving motor 11 and the impeller 23. When the driving fan is working, the transmission component extends into the interior of the casing 2, and it is not the output shaft of the driving motor 11 that is corroded, and the output shaft of the driving motor 11 will not be affected by the corrosive gas in the casing 2. If a problem occurs during the operation of the fan, the transmission component can be replaced, and the replacement is convenient. The transmission component can be replaced without waiting for the driving motor 11 to cool down, and the convenience is high.

[0038] Reference Figure 1 and Figure 2 The transmission assembly includes a transmission seat 3, a transmission shaft 31 rotates inside the transmission seat 3, bearings 32 are arranged at both ends of the transmission seat 3 in the length direction, the outer rings of the two bearings 32 are fixedly connected to the transmission seat 3, the transmission shaft 31 is fixedly connected to the inner ring of the bearing 32, one end of the transmission shaft 31 in the length direction is connected to the output shaft of the driving motor 11 through a flange, a sealing sleeve is arranged on the outer sleeve of the transmission shaft 31, the sealing sleeve is located at one end of the transmission shaft 31 close to the casing 2, and is used to seal the transmission shaft 31, thereby reducing the contact between the corrosive gas and the transmission shaft 31, and improving the service life of the transmission shaft 31; a shaft seal is arranged on the casing 2, and the shaft sealing sleeve is arranged on the outside of the sealing ring, and is used to seal the transmission shaft 31, thereby reducing the contact between the corrosive gas and the transmission shaft 31, and improving the service life of the transmission shaft 31, and can also reduce the leakage of corrosive gas from the casing 2 to the outside.

[0039] Reference Figure 1 and Figure 3 The transmission assembly also includes an insertion shaft 4, which is keyed to the other end of the transmission shaft 31 in the length direction. The impeller 23 includes a wheel disc 24, and a plurality of main blades 241 are evenly spaced on the side of the wheel disc 24 away from the transmission seat 3. The insertion shaft 4 passes through the wheel disc 24 and is keyed to the wheel disc 24. The insertion shaft 4 is threadedly connected with a shaft cover 8, which is located on the side of the wheel disc 24 away from the drive motor 11. The shaft cover 8 can be used to protect the insertion shaft 4, thereby reducing the impact on the insertion shaft 4 when conveying corrosive gases later.

[0040] Reference Figures 1 to 3The air outlet 22 is opened at the upper end of the casing 2. When the insertion shaft 4 is connected to the wheel disc 24, a plurality of main blades 241 are arranged at equal intervals in the circumference of the insertion shaft 4. The ends of the plurality of main blades 241 away from the shaft cover 8 are all arranged in an arc shape, and the arc-shaped main blades 241 are set as the windward part 242; by operating the output shaft of the driving motor 11 to rotate, the transmission shaft 31 is driven to rotate, and the bearing 32 is set to reduce the wear generated when the transmission shaft 31 rotates, thereby improving the service life of the transmission shaft 31; the insertion shaft 4 is driven to rotate, the wheel disc 24 is driven to rotate, and the main blades 241 are driven to move. At this time, corrosive gas can be sent into the casing 2 from the air inlet 21. As the main blades 241 rotate, the windward part 242 changes the wind direction of the corrosive gas and drives the corrosive gas in the direction close to the air outlet 22.

[0041] Reference Figure 1 and Figure 4 A plurality of auxiliary blades 243 are evenly spaced on one side of the wheel disc 24 close to the transmission seat 3. When the insertion shaft 4 is connected to the wheel disc 24, the plurality of auxiliary blades 243 are evenly spaced and arranged in the circumference of the insertion shaft 4. When the wheel disc 24 rotates, the auxiliary blades 243 rotate along with the rotation of the main blades 241. As the auxiliary blades 243 rotate, the gas outside the casing 2 tends to enter the interior of the casing 2. Before using the fan to transport corrosive gases, the staff can adjust the amount of air entering the casing 2 according to the number of auxiliary blades 243 set to ensure that the corrosive gas in the fan does not leak out.

[0042] Reference Figure 1 and Figure 4 During the operation of the fan, if the insertion shaft 4 is affected by corrosive gases during long-term use and cannot be used normally, the staff can replace the insertion shaft 4 by first operating the drive motor 11 to turn off, and then remove the insertion shaft 4, and then connect the new insertion shaft 4 with the transmission shaft 31 and the wheel 24. The structure is simple, the replacement is convenient, and the convenience is high.

[0043] Among them, the main blades 241, the auxiliary blades 243, the wheel disc 24, the transmission shaft 31 and the insertion shaft 4 are all made of corrosion-resistant materials. In this embodiment, stainless steel is preferred, and other materials can also be used as long as they have good corrosion resistance.

[0044] The working principle of the blower for conveying corrosive gas in the embodiment of the present application is as follows: by operating the output shaft of the driving motor 11 to rotate, the transmission shaft 31 is driven to rotate, and the bearing 32 is provided to reduce the wear caused by the rotation of the transmission shaft 31, thereby increasing the service life of the transmission shaft 31; the insertion shaft 4 is driven to rotate, the wheel disc 24 is driven to rotate, and the main blade 241 is driven to move, and the corrosive gas can be sent into the casing 2 from the air inlet 21 at this time. With the rotation of the main blade 241, the windward part 242 changes the wind direction of the corrosive gas, and the corrosive gas is blown toward the direction close to the air outlet 22. To drive; the auxiliary blade 243 rotates with the rotation of the main blade 241. With the rotation of the auxiliary blade 243, the gas outside the casing 2 tends to enter the interior of the casing 2, thereby reducing the leakage of corrosive gases in the fan; during the operation of the fan, if the insertion shaft 4 is affected by the corrosive gas during long-term use and cannot be used normally, the staff can replace the insertion shaft 4. First, the drive motor 11 is turned off, and then the insertion shaft 4 can be removed. Then, the new insertion shaft 4 can be connected to the transmission shaft 31 and the wheel 24. The structure is simple, the replacement is convenient, and the convenience is high.

[0045] Embodiment 2: Reference Figure 5 and Figure 6 The difference between the second embodiment and the first embodiment lies in the different settings inside the housing 2.

[0046] Reference Figure 5 and Figure 6 A negative pressure ring 5 is provided inside the casing 2. The negative pressure ring 5 is located between the casing 2 and the wheel disc 24. The negative pressure ring 5 is provided on the side of the wheel disc 24 away from the main blade 241. As the wheel disc 24 rotates, the auxiliary blade 243 rotates. The negative pressure ring 5 can increase the negative pressure generated when the auxiliary blade 243 rotates, thereby increasing the intensity of external gas suction, and further reducing the occurrence of corrosive gas leakage to the outside of the casing 2.

[0047] Embodiment three: Reference Figure 7 and Figure 8 The difference between the third embodiment and the above embodiments is that the arrangement of the wheel disc 24 is different.

[0048] Reference Figure 7 and Figure 8The diameter of the wheel disc 24 is larger than the diameter of the negative pressure ring 5. A collar 6 extends from one side of the wheel disc 24 close to the negative pressure ring 5. The collar 6 covers the outside of the negative pressure ring 5, and an air outlet is formed between the collar 6 and the negative pressure ring 5. As the wheel disc 24 rotates, the collar 6 can further increase the negative pressure generated when the auxiliary blade 243 rotates. Moreover, when the wheel disc 24 rotates, the collar 6 will also rotate. When the wheel disc 24 rotates at a high speed, the collar 6 can generate centrifugal force, further sucking external air into the interior of the casing 2, thereby reducing the leakage of corrosive gases to the outside of the casing 2.

[0049] Embodiment 4: Reference Fig. 9 and Fig.10 The difference between the fourth embodiment and the above embodiments is that the auxiliary blades 243 are arranged differently.

[0050] Reference Figures 9 to 11 A wind cutting plate 7 is fixedly connected to one side of the auxiliary blade 243 in the length direction. The wind cutting plate 7 is obliquely arranged on the side of the auxiliary blade 243 away from the wheel disc 24. As the wheel disc 24 rotates, the auxiliary blade 243 rotates, thereby driving a number of wind cutting plates 7 to move, thereby disturbing the gas around the wind cutting plates 7, increasing the negative pressure in the casing 2, and making the gas outside the casing 2 tend to flow into the casing 2, thereby reducing the leakage of corrosive gases in the casing 2.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A blower for conveying corrosive gas, comprising a bracket (1), characterized in that: A housing (2) is provided at one end of the support (1) in the length direction, the housing (2) is provided with an air inlet (21) and an air outlet (22), a driving motor (11) is provided on the support (1), an impeller (23) rotates in the housing (2), a transmission assembly is provided between the driving motor (11) and the housing (2), the transmission assembly extends into the interior of the housing (2), and is used to connect the output shaft of the driving motor (11) and the impeller (23).

2. A blower for conveying corrosive gas according to claim 1, characterized in that: The transmission assembly comprises a transmission seat (3), a transmission shaft (31) is rotatable in the transmission seat (3), bearings (32) are arranged at both ends of the transmission seat (3) in the length direction, the outer rings of the two bearings (32) are fixedly connected to the transmission seat (3), the transmission shaft (31) is fixedly connected to the inner rings of the bearings (32), one end of the transmission shaft (31) in the length direction is detachably connected to the output shaft of the drive motor (11), and the transmission assembly also comprises an insertion shaft (4), the insertion shaft (4) is detachably connected to the other end of the transmission shaft (31) in the length direction, and the insertion shaft (4) extends to the inside of the casing (2) and is detachably connected to the impeller (23).

3. A blower for conveying corrosive gas according to claim 2, characterized in that: The impeller (23) comprises a wheel disc (24), a side of the wheel disc (24) away from the transmission seat (3) is provided with a plurality of main blades (241) at equal intervals, an insertion shaft (4) passes through the wheel disc (24) and is key-connected to the wheel disc (24), and the insertion shaft (4) is detachably connected (bolted) to a shaft cover (8), and the shaft cover (8) is located on a side of the wheel disc (24) away from the drive motor (11).

4. A blower for conveying corrosive gas according to claim 3, characterized in that: The air outlet (22) is opened at the upper end of the casing (2), and when the insertion shaft (4) is connected to the wheel disc (24), a plurality of main blades (241) are arranged at equal intervals in the circumference of the insertion shaft (4), and the ends of the plurality of main blades (241) away from the shaft cover (8) are all arranged in an arc shape.

5. The blower for conveying corrosive gas according to claim 3, characterized in that: A plurality of auxiliary blades (243) are arranged at equal intervals on one side of the wheel disc (24) close to the transmission seat (3); when the insertion shaft (4) is connected to the wheel disc (24), the plurality of auxiliary blades (243) are arranged at equal intervals in the circumferential direction of the insertion shaft (4).

6. A blower for conveying corrosive gas according to claim 5, characterized in that: A negative pressure ring (5) is arranged inside the casing (2), the negative pressure ring (5) is located between the casing (2) and the wheel disc (24), and the negative pressure ring (5) is arranged on a side of the wheel disc (24) away from the main blades (241).

7. A blower for conveying corrosive gas according to claim 6, characterized in that: The diameter of the wheel disc (24) is greater than the diameter of the negative pressure ring (5); a sleeve ring (6) extends from one side of the wheel disc (24) close to the negative pressure ring (5); the sleeve ring (6) covers the outside of the negative pressure ring (5); and an air outlet is formed between the sleeve ring (6) and the negative pressure ring (5).

8. The blower for conveying corrosive gas according to claim 5, characterized in that: One side of the auxiliary blade (243) in the length direction is fixedly connected to a wind cutting plate (7), and the wind cutting plate (7) is arranged obliquely on the side of the auxiliary blade (243) away from the wheel disc (24).

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