High-temperature-resistant plug-in direct-connection centrifugal fan

Abstract

The invention discloses a high-temperature-resistant plug-in direct-connection centrifugal fan, and relates to the field of centrifugal fans, the high-temperature-resistant plug-in direct-connection centrifugal fan comprises a base and a driving motor arranged at the upper end of the base, a wind wheel is mounted at the output end of the driving motor, and a fan cover sleeves the outer side of the wind wheel; and a flow guide heat-resisting pipe is wound on the surface of the driving motor. According to the high-temperature-resistant plug-in direct-connection centrifugal fan, when a driving motor drives a wind wheel, a liquid storage bin communicates with a flow guide heat-resistant pipe, the flow guide heat-resistant pipe is wound around the surface of the driving motor, the driving motor is cooled through internal water, and under the arrangement of a cooler, the temperature of cooling water is cooled; therefore, the direct-connected centrifugal fan can resist high temperature and can continuously work for a long time, cooling liquid in the flow guide heat-resisting pipe moves and can circularly move for cooling, cooling is matched with cooling of the cooler, the cooling efficiency is further improved, and the direct-connected centrifugal fan is higher in high temperature resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal fans, in particular to a high-temperature resistant plug-in direct-connected centrifugal fan. Background Art

[0002] A plug-in direct-connect centrifugal fan is a type of fan equipment that rotates by directly connecting to a power source (such as a motor) and is used to transport gas. Its "plug-in" design means that the fan can be easily inserted into a pipe or system. It is usually used in ventilation or exhaust systems that require an efficient and compact layout. The characteristic of a centrifugal fan is that it uses the rotation of the impeller to generate centrifugal force, sucking gas from the center and discharging it axially. It has high efficiency and large pressure output and is widely used in industry, building air conditioning, ventilation and other fields.

[0003] In the prior art, when a centrifugal fan is in use, dust easily enters the fan. After the dust enters the fan and accumulates, it easily affects the wind power transmission of the fan.

[0004] To overcome these shortcomings, a prior art Chinese patent (publication number CN220227221U) discloses a high-temperature-resistant, plug-in, direct-connect centrifugal fan assembled with the drying equipment's motor mounting plate. This centrifugal fan consists of an air inlet, an impeller, a heat shield, a cooling fan, and a B5 variable-frequency motor with an extended shaft. The air inlet and impeller are located within the drying equipment's inner air duct, coinciding with the center of the extended shaft. The main body of the B5 variable-frequency motor is fixedly mounted on the outside of the motor mounting plate, while the heat shield rests against the inside of the motor mounting plate, separating the impeller and motor body. The cooling fan is embedded between the motor mounting plate and the motor body, driven by turbulent flow for heat exchange and cooling. Application of this direct-connect centrifugal fan to a small dryer significantly reduces the fan's footprint and the number of ancillary components required by conventional fans by combining a motor extension shaft with a direct-connect assembly structure, coupled with casing insulation and a front-mounted cooling fan. This significantly reduces the fan's operational stability and lowers maintenance costs.

[0005] To overcome the above-mentioned shortcomings, a Chinese patent of the prior art (publication number CN218934839U) discloses a centrifugal exhaust fan, wherein the back of the casing is provided with a through hole corresponding to the centrifugal impeller, the front of the casing is provided with an air inlet concentric with the through hole, the cover plate is provided on the back of the casing to cover the through hole, the outer side of the cover plate is provided with a motor fixing seat, the motor is provided on the motor fixing seat, the rotating shaft of the motor passes through the cover plate and extends into the casing, the centrifugal impeller is provided at the front end of the rotating shaft of the motor and is located in the casing, the screw is provided at the front end of the casing and passes through the cover plate backward, a nut is provided on the screw and is located behind the cover plate, and an extension rod is provided concentrically at the tail end of the screw. The centrifugal exhaust fan described in the utility model can lock the cover plate with a nut, has a stable structure, and when disassembled, the nut is unscrewed to allow the centrifugal impeller to be quickly removed from the casing, facilitating cleaning and maintenance of the centrifugal impeller.

[0006] Although the existing technology can overcome the above-mentioned shortcomings, there are still other problems during its operation, such as: after the fan is used for a long time, the motor that drives the fan is prone to high temperature. The continuous use of the high-temperature motor can easily cause the internal parts and components to burn out. The motor has poor heat resistance, which is not conducive to the continuous use of the centrifugal fan. Summary of the Invention

[0007] The purpose of the present invention is to provide a high-temperature resistant plug-in direct-connected centrifugal fan to solve the problem raised in the above background technology that after the fan is used for a long time, the motor driving the fan is prone to generate high temperature. The continuous use of the high-temperature motor is likely to cause the internal parts and components to burn out, and the motor has poor heat resistance, which is not conducive to the continuous use of the centrifugal fan.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-temperature resistant plug-in direct-connected centrifugal fan, comprising a base and a driving motor arranged at the upper end of the base, and a wind wheel is installed at the output end of the driving motor, and a fan cover is provided on the outer side of the wind wheel; a flow-guiding heat-resistant tube is wrapped around the surface of the driving motor, and an auxiliary cooling mechanism is provided on the outer side of the flow-guiding heat-resistant tube; a tooth plate is provided at the output end of the driving motor, and a pressurized circulation mechanism is provided on the outer side of the tooth plate; a connecting shaft is provided above the base, and a uniform cooling mechanism is provided on the outer side of the connecting shaft.

[0009] Furthermore, a dust removal net is installed at the front end of the fan cover by bolts, and the dust removal net is circular in shape, and an air outlet is provided at the upper end of the fan cover. The dust removal net is installed at the front end of the fan cover by bolts to isolate dust, and the dust removal net can be easily disassembled and cleaned, making it convenient for staff to operate.

[0010] Furthermore, the auxiliary cooling mechanism is provided with a liquid storage tank, and the lower end of the liquid storage tank is fixedly installed on the upper end of the base, and the inner side of the liquid storage tank is connected to the guide heat-resistant pipe, and cooling water is provided inside the liquid storage tank and the guide heat-resistant pipe.

[0011] Furthermore, a cooler is installed on the outside of the liquid storage tank, and the inside of the cooler is located inside the liquid storage tank to cool the temperature of the cooling water, so that the direct-connected centrifugal fan can withstand high temperatures and can work continuously for a long time.

[0012] Furthermore, the pressurized circulation mechanism is provided with a gear plate, and the inner side of the gear plate is rotatably mounted on the outer side of the fan cover, and the gear plate is meshed with teeth on the surface of the tooth plate, and two teeth are provided on the outer periphery of the tooth plate.

[0013] Furthermore, a driving shaft is fixedly mounted on the outer side of the gear plate, a limiting sleeve is installed through the middle end of the driving shaft, and the lower end of the limiting sleeve is fixedly mounted on the upper end of the base.

[0014] Furthermore, a first bevel gear is fixedly installed on the end of the driving shaft, and a second bevel gear is meshedly installed on the lower end of the first bevel gear, and a reciprocating threaded rod is fixedly installed on the lower end of the second bevel gear, and a positioning sleeve is provided on the surface of the reciprocating threaded rod, and the lower end of the positioning sleeve is fixedly installed on the upper end of the liquid storage tank, so that as the direct-connected centrifugal fan is started, the left and right sealing piston plates compress and extract the inside of the liquid storage tank respectively.

[0015] Furthermore, a lifting sleeve is threadedly installed on the surface of the reciprocating threaded rod, and the lifting sleeve is slidably connected to the upper end of the liquid storage tank, and a sealing piston plate is fixedly installed on the lower end of the lifting sleeve, and the outer side of the sealing piston plate fits the inner wall of the liquid storage tank, and a limiting guide rod is fixedly installed on the upper end of the sealing piston plate, and the number of the limiting guide rods is two, and the upper end of the limiting guide rod passes through the upper end of the liquid storage tank. The left and right two sealing piston plates are highly staggered, so that the cooling liquid inside the guide heat-resistant tube can move, and can circulate for cooling, cooperate with the cooling of the cooler, further improve the cooling efficiency, and make the direct-connected centrifugal fan more resistant to high temperatures.

[0016] Furthermore, the uniform cooling mechanism is provided with a transmission belt, and the upper end of the transmission belt is arranged on the middle end of the drive shaft through a pulley, and the lower end of the transmission belt is arranged on the middle end of the connecting shaft through a pulley, and the end of the connecting shaft is rotatably installed with the limit sleeve.

[0017] Furthermore, a rotating rod is fixedly installed on the outer side of the connecting shaft, and the rotating rod and the liquid storage tank are rotatably installed, and the rotating rod and the liquid storage tank are sealed by a sealing sleeve, and the rotating rod is located on the inner surface of the liquid storage tank and is provided with a stirring wheel, which can drive the liquid inside the liquid storage tank to stir and mix through the inner stirring wheel, further promote the cooling efficiency of the cooling liquid, further improve the cooling effect, and avoid uneven cooling of the liquid.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. When the drive motor drives the wind wheel, the liquid storage tank is connected to the heat-resistant guide pipe, which is wrapped around the surface of the drive motor. The water inside the guide pipe cools the drive motor, and the temperature of the cooling water is cooled by the cooler. In this way, the direct-connected centrifugal fan can withstand high temperatures and can work continuously for a long time. Furthermore, when in use, the upper end of the direct-connected centrifugal fan is inserted into the device and connected. By starting the drive motor on the base, the wind wheel at the output end of the drive motor can be driven to rotate. After the wind wheel rotates, the air is extracted from the circular opening at the front end of the fan cover through the negative pressure centrifugal setting, and the extracted wind force is sent out from the upper end of the fan cover. A dust removal net is installed at the front end of the fan cover through bolts to isolate dust, and the dust removal net can be easily disassembled and cleaned, making it convenient for staff to operate.

[0019] 2. During use, the toothed plate at the output end of the driving motor rotates to drive the gear plate, which is driven by the teeth on the surface of the toothed plate and can drive the gear plate to rotate slowly. When the gear plate rotates, it can drive the drive shaft to rotate. Under the limit of the limit sleeve, the sealing piston plates on the left and right sides are staggered in height, one high and one low. As the direct-connected centrifugal fan is started, the left and right sealing piston plates compress and extract the inside of the liquid storage tank respectively, so that the cooling liquid inside the guide heat-resistant tube moves, and can circulate to cool down, cooperate with the cooling of the cooler, further improve the cooling efficiency, and make the direct-connected centrifugal fan more resistant to high temperatures.

[0020] 3. When the direct-connected centrifugal fan starts circulating and drives the liquid inside the heat-resistant tube for cooling, as the drive shaft rotates, the connecting shaft can be driven to rotate through the pulley and the transmission belt. When the connecting shaft rotates, the liquid inside the liquid storage tank can be driven to stir and mix through the inner stirring wheel, further promoting the cooling efficiency of the cooling liquid, further improving the cooling effect, and avoiding uneven cooling of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0022] Figure 2It is a bottom-up three-dimensional structural schematic diagram of the present invention.

[0023] Figure 3 It is a rear-view stereoscopic structural schematic diagram of the present invention.

[0024] Figure 4 It is a schematic diagram of the front sectional three-dimensional structure of the fan cover of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the fan cover in a side cross-section of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the connection between the tooth plate and the gear plate of the present invention.

[0027] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the liquid storage bin of the present invention.

[0028] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0029] Figure 9 It is a schematic diagram of the cross-sectional three-dimensional structure of the lifting sleeve of the present invention.

[0030] Figure 10 It is a schematic diagram of the three-dimensional structure of the transmission belt of the present invention.

[0031] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point B in the middle.

[0032] In the figure: 1. Base; 2. Drive motor; 3. Wind wheel; 4. Fan cover; 5. Dust removal net; 6. Liquid storage tank; 7. Cooler; 8. Guide heat-resistant pipe; 9. Tooth plate; 10. Gear plate; 11. Drive shaft; 12. Limit sleeve; 13. First bevel gear; 14. Second bevel gear; 15. Reciprocating threaded rod; 16. Positioning sleeve; 17. Lifting sleeve; 18. Sealing piston plate; 19. Limit guide rod; 20. Connecting shaft; 21. Drive belt; 22. Rotating rod; 23. Agitator wheel; 24. Sealing sleeve. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1: Figure 1-Figure 5The technical solution shown is a high-temperature resistant plug-in direct-connected centrifugal fan. In order to solve the problem of high-temperature intolerance, it discloses: a base 1 and a driving motor 2 arranged at the upper end of the base 1, and a wind wheel 3 is installed at the output end of the driving motor 2, and a fan cover 4 is provided on the outer side of the wind wheel 3; a flow-guiding heat-resistant pipe 8 is wrapped around the surface of the driving motor 2, and an auxiliary cooling mechanism is provided on the outer side of the flow-guiding heat-resistant pipe 8, a dust removal net 5 is installed on the front end of the fan cover 4 by bolts, and the dust removal net 5 is circular in shape, and an air outlet is provided at the upper end of the fan cover 4, the auxiliary cooling mechanism is provided with a liquid storage tank 6, and the lower end of the liquid storage tank 6 is fixedly installed on the upper end of the base 1, and the inner side of the liquid storage tank 6 is connected to the flow-guiding heat-resistant pipe 8, and cooling water is provided inside the liquid storage tank 6 and the flow-guiding heat-resistant pipe 8, a cooler 7 is installed on the outer side of the liquid storage tank 6, and the inner side of the cooler 7 is located inside the liquid storage tank 6.

[0035] When in use, the upper end of the direct-connected centrifugal fan is inserted and connected to the device. By starting the driving motor 2 on the base 1, the wind wheel 3 at the output end of the driving motor 2 can be driven to rotate. After the wind wheel 3 rotates, the air is extracted from the circular port at the front end of the fan cover 4 through the negative pressure centrifugal setting, and the extracted wind force is sent out from the upper end of the fan cover 4. The dust removal net 5 is installed at the front end of the fan cover 4 through bolts to isolate the dust, and the dust removal net 5 can be easily disassembled and cleaned, making it convenient for the staff to operate. At the same time, when the driving motor 2 drives the wind wheel 3, the guide heat-resistant pipe 8 is connected through the liquid storage tank 6. The guide heat-resistant pipe 8 is wrapped around the surface of the driving motor 2, and the driving motor 2 is cooled by the water inside. Under the setting of the cooler 7, the temperature of the cooling water is cooled, so that the direct-connected centrifugal fan can withstand high temperatures and can work continuously for a long time.

[0036] Example 2: Figures 1-9The technical solution shown, on the basis of embodiment 1, in order to solve the problem of poor cooling efficiency, discloses: a tooth plate 9 is provided at the output end of the driving motor 2, and a pressurized circulation mechanism is provided on the outer side of the tooth plate 9, the pressurized circulation mechanism is provided with a gear plate 10, and the inner side of the gear plate 10 is rotatably mounted with the outer side of the fan cover 4, and the gear plate 10 is meshed with the teeth on the surface of the tooth plate 9, and two teeth are provided on the outer periphery of the tooth plate 9, a driving shaft 11 is fixedly mounted on the outer side of the gear plate 10, and a limiting sleeve 12 is installed through the middle end of the driving shaft 11, and the lower end of the limiting sleeve 12 is fixedly mounted on the upper end of the base 1, a first bevel gear 13 is fixedly mounted on the end of the driving shaft 11, and the lower end of the first bevel gear 13 is meshed with a second bevel gear Gear 14, and the lower end of the second bevel gear 14 is fixedly installed with a reciprocating threaded rod 15, and the surface of the reciprocating threaded rod 15 is sleeved with a positioning sleeve 16, the lower end of the positioning sleeve 16 is fixedly installed on the upper end of the liquid storage tank 6, the surface of the reciprocating threaded rod 15 is threadedly installed with a lifting sleeve 17, and the lifting sleeve 17 is slidably connected to the upper end of the liquid storage tank 6, and the lower end of the lifting sleeve 17 is fixedly installed with a sealing piston plate 18, and the outer side of the sealing piston plate 18 fits the inner wall of the liquid storage tank 6, the upper end of the sealing piston plate 18 is fixedly installed with a limiting guide rod 19, and the number of limiting guide rods 19 is two, and the upper end of the limiting guide rod 19 passes through the upper end of the liquid storage tank 6, and the left and right sealing piston plates 18 are highly staggered.

[0037] When in use, the drive motor 2 drives the toothed plate 9 at the output end of the drive motor 2 to rotate and drive the gear plate 10. The gear plate 10 is toggled by the teeth on the surface of the toothed plate 9, and can slowly drive the gear plate 10 to rotate. When the gear plate 10 rotates, it can drive the drive shaft 11 to rotate. Under the limit of the limiting sleeve 12, the drive shaft 11 can drive the second bevel gear 14 to rotate through the first bevel gear 13. When the second bevel gear 14 rotates, it can drive the reciprocating threaded rod 15 at the lower end to rotate. When the reciprocating threaded rod 15 rotates, it can drive the surface threaded connection under the limit of the positioning sleeve 16. The lifting sleeve 17, the lower end of the lifting sleeve 17 is fixedly connected to the sealing piston plate 18, and the sealing piston plate 18 is limited by the limiting guide rod 19, so that the sealing piston plate 18 can be lifted and reciprocated, and the sealing piston plates 18 on the left and right sides are staggered in height, one high and one low. As the direct-connected centrifugal fan is started, the left and right sealing piston plates 18 respectively compress and extract the inside of the liquid storage tank 6, so that the cooling liquid inside the guide heat-resistant tube 8 is moved, and can be circulated for cooling, cooperating with the cooling of the cooler 7, further improving the cooling efficiency, and making the direct-connected centrifugal fan more resistant to high temperatures.

[0038] Example 3: Figures 1-11The technical solution shown is based on Example 2 and, in order to solve the problem of uneven cooling, discloses that: a connecting shaft 20 is provided above the base 1, and a uniform cooling mechanism is provided on the outside of the connecting shaft 20, and the uniform cooling mechanism is provided with a transmission belt 21, and the upper end of the transmission belt 21 is sleeved on the middle end of the drive shaft 11 through a pulley, and the lower end of the transmission belt 21 is sleeved on the middle end of the connecting shaft 20 through a pulley, and the end of the connecting shaft 20 is rotatably installed with the limit sleeve 12, a rotating rod 22 is fixedly installed on the outside of the connecting shaft 20, and the rotating rod 22 is rotatably installed with the liquid storage tank 6, and the rotating rod 22 and the liquid storage tank 6 are sealed by a sealing sleeve 24, and the rotating rod 22 is located on the inner surface of the liquid storage tank 6 and is provided with a stirring wheel 23.

[0039] When the direct-connected centrifugal fan starts circulating and drives the liquid inside the heat-resistant pipe 8 to cool, as the drive shaft 11 rotates, the connecting shaft 20 can be driven to rotate through the pulley and the transmission belt 21. When the connecting shaft 20 rotates, the rotating rod 22 at the end rotates, and the rotating rod 22 is rotationally connected to the liquid storage tank 6. The rotating rod 22 and the liquid storage tank 6 are sealed by a sealing sleeve 24. Therefore, when the rotating rod 22 rotates, the liquid inside the liquid storage tank 6 can be driven to stir and mix through the inner stirring wheel 23, further promoting the cooling efficiency of the cooling liquid, further improving the cooling effect, and avoiding uneven cooling of the liquid.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant plug-in direct-connected centrifugal fan, comprising a base (1) and a drive motor (2) arranged at the upper end of the base (1), wherein a wind wheel (3) is installed at the output end of the drive motor (2), and a fan cover (4) is provided on the outer side of the wind wheel (3); Its characteristics are: A flow-guiding heat-resistant tube (8) is wound around the surface of the driving motor (2), and an auxiliary cooling mechanism is provided on the outside of the flow-guiding heat-resistant tube (8); The output end of the driving motor (2) is provided with a tooth plate (9), and a pressurizing circulation mechanism is provided on the outer side of the tooth plate (9); A connecting shaft (20) is provided above the base (1), and a uniform cooling mechanism is provided on the outside of the connecting shaft (20).

2. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 1, characterized in that: A dust removal net (5) is mounted on the front end of the fan cover (4) via bolts, and the dust removal net (5) is circular in shape, and an air outlet is provided at the upper end of the fan cover (4).

3. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 1, characterized in that: The auxiliary cooling mechanism is provided with a liquid storage tank (6), and the lower end of the liquid storage tank (6) is fixedly mounted on the upper end of the base (1), and the inner side of the liquid storage tank (6) is connected to the flow-guiding heat-resistant pipe (8), and cooling water is provided inside the liquid storage tank (6) and the flow-guiding heat-resistant pipe (8).

4. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 3, characterized in that: A cooler (7) is installed on the outside of the liquid storage bin (6), and the inside of the cooler (7) is located inside the liquid storage bin (6).

5. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 1, characterized in that: The pressurized circulation mechanism is provided with a gear plate (10), and the inner side of the gear plate (10) is rotatably mounted on the outer side of the fan cover (4), and the gear plate (10) is meshed with teeth on the surface of the tooth plate (9), and two teeth are provided on the outer periphery of the tooth plate (9).

6. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 5, characterized in that: A drive shaft (11) is fixedly mounted on the outer side of the gear plate (10), a limiting sleeve (12) is installed through the middle end of the drive shaft (11), and the lower end of the limiting sleeve (12) is fixedly mounted on the upper end of the base (1).

7. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 6, characterized in that: A first bevel gear (13) is fixedly mounted on the end of the drive shaft (11), and a second bevel gear (14) is meshedly mounted on the lower end of the first bevel gear (13), and a reciprocating threaded rod (15) is fixedly mounted on the lower end of the second bevel gear (14), and a positioning sleeve (16) is sleeved on the surface of the reciprocating threaded rod (15), and the lower end of the positioning sleeve (16) is fixedly mounted on the upper end of the liquid storage tank (6).

8. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 7, characterized in that: The surface of the reciprocating threaded rod (15) is threadedly mounted with a lifting sleeve (17), and the lifting sleeve (17) is slidably connected to the upper end of the liquid storage bin (6), and a sealing piston plate (18) is fixedly mounted on the lower end of the lifting sleeve (17), and the outer side of the sealing piston plate (18) is in contact with the inner wall of the liquid storage bin (6), and a limiting guide rod (19) is fixedly mounted on the upper end of the sealing piston plate (18), and the number of the limiting guide rods (19) is two, and the upper ends of the limiting guide rods (19) pass through the upper end of the liquid storage bin (6), and the left and right sealing piston plates (18) are staggered in height.

9. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 1, characterized in that: The uniform cooling mechanism is provided with a transmission belt (21), and the upper end of the transmission belt (21) is sleeved on the middle end of the driving shaft (11) through a pulley, and the lower end of the transmission belt (21) is sleeved on the middle end of the connecting shaft (20) through a pulley, and the end of the connecting shaft (20) is rotatably mounted on the limiting sleeve (12).

10. The high temperature resistant plug-in direct-connected centrifugal fan according to claim 9, characterized in that: A rotating rod (22) is fixedly mounted on the outer side of the connecting shaft (20), and the rotating rod (22) and the liquid storage tank (6) are rotatably mounted, and the rotating rod (22) and the liquid storage tank (6) are sealed by a sealing sleeve (24), and a stirring wheel (23) is provided on the inner surface of the rotating rod (22) located in the liquid storage tank (6).

Images