An automatic cleaning device for turbine centrifugal fans

Abstract

An automatic cleaning device for a turbine-type centrifugal fan is provided, comprising a centrifugal fan housing with an inspection port covered by a cover. An air inlet is located on one side of the centrifugal fan housing, with a duct flange for connecting to a duct. A condensate drain outlet is located on the lower part of the other side of the centrifugal fan housing for connecting to a condensate drain pipe. The inspection cover is fixed to the centrifugal fan housing around its circumference by a plurality of evenly arranged jet-type fixing screws, covering the inspection port. The duct flange opposite the condensate drain outlet is fixed to the connection hole of the centrifugal fan housing by a jet-rod type fixing screw. The plurality of jet-type fixing screws and the jet-rod type fixing screw are interconnected through an air pipe and connected to an air source. This invention achieves automatic cleaning of the fan, effectively solving the problems of dust adhesion on the surface of the centrifugal fan turbine and dirt accumulation at the condensate collection port, reducing the labor intensity of fan cleaning and extending the service life of the fan.

Description

Technical Field

[0001] This invention belongs to the field of centrifugal fan technology, specifically relating to an automatic cleaning device for turbine centrifugal fans. Background Technology

[0002] Cylindrical equipment is an important piece of equipment in the tobacco processing industry. It mainly consists of a cylinder, inlet, outlet, heater, rotating screen, dehumidification system, and circulation system. Its main functions are to loosen, heat, humidify, flavor, and add feed to the material. The circulation system uses a turbine centrifugal fan. During operation, airflow enters the turbine space axially from the fan, and under the drive of the turbine, leaves the turbine radially and enters the outlet, thus realizing the circulation of airflow inside the cylinder.

[0003] Centrifugal fans transport airflow from the discharge end to the feed end within the cylinder, achieving airflow circulation inside the cylinder. Dust in the airflow adheres to the inside of the fan casing under centrifugal force, forming dirt. The internal space of the fan casing is confined, making cleaning time-consuming and labor-intensive. Excessive dirt accumulation not only leads to mold growth but also clogs the condensate collection port, increasing turbine resistance and shortening the lifespan of the centrifugal fan motor. On-site investigation and analysis by technicians revealed that when the centrifugal fan is operating, dust in the airflow adheres to the turbine surface, forming dirt. During equipment preheating, condensation forms wet clumps, and the dirt is thrown to the inner surface of the fan casing under centrifugal force. The gradual accumulation of large amounts of dirt eventually clogs the condensate collection port. Therefore, the main causes of dirt accumulation inside the fan are: dust adhesion to the turbine surface and dirt accumulation at the condensate collection port. Improvements are proposed to address this issue. Summary of the Invention

[0004] The technical problem solved by this invention is to provide an automatic cleaning device for a turbine centrifugal fan. This invention improves the ordinary screws on the inspection port of the centrifugal fan by replacing them with jet-type fixing screws, and improves the connecting bolts of the duct flange and the connecting hole at the bottom of the centrifugal fan housing by replacing them with jet-rod type fixing screws. This enables the automatic cleaning function of the fan, effectively solving the problems of dust adhesion on the surface of the centrifugal fan turbine and dirt accumulation at the condensate collection port, reducing the labor intensity of fan cleaning and extending the service life of the fan.

[0005] The technical solution adopted in this invention is as follows: An automatic cleaning device for a turbine centrifugal fan includes a centrifugal fan housing. The centrifugal fan housing has an inspection port, which is covered by an inspection cover. One side of the centrifugal fan housing has an air inlet with a duct flange for connecting to a duct. The lower part of the other side of the centrifugal fan housing has a condensate drain outlet for connecting to a condensate drain pipe. The inspection cover is fixed to the centrifugal fan housing around its circumference by a plurality of evenly arranged jet-type fixing screws, covering the inspection port. The duct flange opposite to the condensate drain outlet and the connection hole of the centrifugal fan housing are fixedly connected by a jet-rod-type fixing screw. The jet nozzle of the jet-rod-type fixing screw extends into the lower part of the inner cavity of the centrifugal fan housing. The plurality of jet-type fixing screws and the jet-rod-type fixing screw are interconnected through an air pipe and connected to an air source.

[0006] Further defining the above technical solution, each of the jet-type fixing screws includes a common screw and an air pipe connector I. The common screw has a through-hole for jetting formed inside by drilling. One end of the air outlet of the air pipe connector I is sealed and fixedly connected to one end of the common screw nut.

[0007] Further defining the above technical solution, the air outlet end of the air pipe connector I and the port of the ordinary screw and nut are fixedly connected by welding and sealing.

[0008] Further defining the above technical solution, one end of the air outlet of the air pipe connector I is sealed and screwed onto one end of a common screw and nut through a sealing ring and threaded structure.

[0009] Further defining the above technical solution, the jet rod type fixing screw includes an air pipe connector II, a threaded jet rod, and an extended jet rod. The air inlet end of the air pipe connector II is connected to an air pipe, and the air outlet end of the air pipe connector II is connected to one end of the threaded jet rod via connector I. The other end of the threaded jet rod is connected to one end of the extended jet rod via connector II, and the other end of the extended jet rod is a jet nozzle. The outer surface of the threaded jet rod is provided with external threads. The threaded jet rod passes through the corresponding connection holes in the lower part of the air duct flange and the centrifugal fan housing and is connected by screwing it with two fixing nuts. The air pipe connector II connected to one end of the threaded jet rod is placed outside the centrifugal fan housing and connected to the air pipe. The extended jet rod connected to the other end of the threaded jet rod is placed inside the centrifugal fan housing and corresponds to the position of the condensate drain outlet.

[0010] Further defining the above technical solution, the endotracheal connector II is a rotary endotracheal connector, and both connector I and connector II are hexagonal connectors, with internal threads for connection inside the hexagonal connector.

[0011] Further limitations of the above technical solution include a filter pressure regulating valve, a solenoid valve, and an air source switch. The plurality of jet-type fixing screws and one jet rod-type fixing screw are connected to the filter pressure regulating valve through an air pipe. The filter pressure regulating valve is connected to the solenoid valve through an air pipe. The solenoid valve is connected to the air source switch through an air pipe.

[0012] Advantages of this invention compared to existing technologies:

[0013] 1. This solution improves the centrifugal fan by replacing the ordinary screws on the inspection port with jet-type fixing screws. This allows compressed air to be sprayed onto the turbine surface inside the centrifugal fan through the jet-type fixing screws, preventing dust from adhering to the turbine surface. Simultaneously, by replacing the connecting bolts between the duct flange and the lower connecting hole of the centrifugal fan housing with jet-rod type fixing screws, it enables the spraying of air onto the condensate drain outlet, preventing dirt accumulation at the condensate drain outlet. Furthermore, by connecting and merging the two compressed air paths of the jet-type and jet-rod type fixing screws through air pipes, air source switches, solenoid valves, and filter pressure reducing valves, an automatic fan cleaning function is achieved. This effectively solves the problems of dust adhesion on the centrifugal fan turbine surface and dirt accumulation at the condensate collection outlet, reducing the labor intensity of fan cleaning and extending the fan's service life.

[0014] 2. This solution achieves automatic cleaning of the centrifugal fan without changing its structure by improving the ordinary connecting screws of the inspection cover and the connecting bolts of the air duct flange. The structure is novel and easy to manufacture. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the centrifugal fan housing in this invention;

[0017] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of part A in the diagram;

[0018] Figure 4 This is a schematic diagram of the jet-type fixing screw in this invention;

[0019] Figure 5 In this invention Figure 2 The right view;

[0020] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of section B in the diagram;

[0021] Figure 7 This is a schematic diagram of the jet rod type fixing screw in this invention;

[0022] Figure 8 This is the circuit diagram of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Please see Figure 1-8 The embodiments of the present invention are described in detail below.

[0026] An automatic cleaning device for turbine centrifugal fans, such as Figure 2 As shown, the device includes a centrifugal fan housing 1, on which an inspection port 2 is provided. The inspection port 2 is covered by an inspection cover 3, which is fixed to the centrifugal fan housing 1 around its circumference by a plurality of evenly arranged jet-type fixing screws 4, thus covering the inspection port 2. Specifically, as... Figure 3 and 4 As shown, each of the jet-type fixing screws 4 includes a standard screw 5 and an air pipe connector I6. The standard screw 5 has a through-hole 5-1 formed inside by drilling. One end of the air outlet of the air pipe connector I6 is sealed and fixedly connected to one end of the nut of the standard screw 5. The plurality of jet-type fixing screws 4 are interconnected through an air pipe 20 and connected to an air source.

[0027] When the endotracheal connector I6 is connected to the ordinary screw 5: one end of the endotracheal connector I6 and one end of the nut of the ordinary screw 5 are fixedly connected by welding; or, one end of the endotracheal connector I6 is sealed and screwed onto one end of the nut of the ordinary screw 5 by a sealing ring and a threaded structure.

[0028] The centrifugal fan casing 1 has an air inlet 8 on one side, such as Figure 5As shown, the air inlet 8 is equipped with a duct flange 9 for connecting to the air duct. The lower part of the other side of the centrifugal fan housing 1 is equipped with a condensate drain port for connecting to the condensate drain pipe 7. The duct flange 9 opposite to the condensate drain port and the connection hole of the centrifugal fan housing 1 are fixedly connected by a jet rod type fixing screw 10. The jet nozzle of the jet rod type fixing screw 10 extends into the lower part of the inner cavity of the centrifugal fan housing 1, directly facing the condensate drain port. The jet rod type fixing screw 10 is connected to an air source via an air pipe 20.

[0029] Specifically, such as Figure 6 and 7 As shown, the jet rod type fixing screw 10 includes an air pipe connector II 11, a threaded jet rod 13, and an extension jet rod 15. The air inlet end of the air pipe connector II 11 is connected to the air pipe 20, and the air outlet end of the air pipe connector II 11 is connected to one end of the threaded jet rod 13 through connector I 12. The other end of the threaded jet rod 13 is connected to one end of the extension jet rod 15 through connector II 14. The other end of the extension jet rod 15 is a jet nozzle. The outer surface of the threaded jet rod 13 is provided with an external thread 13-1. The threaded jet rod 13 passes through the corresponding connection hole at the bottom of the air duct flange 9 and the centrifugal fan housing 1 and is connected to it by screwing it with two fixing nuts 16. The air pipe connector II 11 connected to one end of the threaded jet rod 13 is placed outside the centrifugal fan housing 1 and connected to the air pipe 20. The extension jet rod 15 connected to the other end of the threaded jet rod 13 is placed inside the centrifugal fan housing 1 and corresponds to the position of the condensate drain outlet.

[0030] The air pipe connector II11 is a rotary air pipe connector, and both connector I12 and connector II14 are hexagonal connectors. The hexagonal connector has internal threads for connection. The threaded blow air rod 13 and the extended blow air rod 15 are both hollow rod structures.

[0031] like Figure 1 As shown, it also includes a filter pressure regulating valve 17, a solenoid valve 18, and an air source switch 19. The plurality of jet-type fixing screws 4 and one jet rod-type fixing screw 10 are connected to the filter pressure regulating valve 17 via an air pipe 20. The filter pressure regulating valve 17 is connected to the solenoid valve 18 via the air pipe 20, and the solenoid valve 18 is connected to the air source switch 19 via the air pipe 20. Its connection circuit diagram is as follows: Figure 8 As shown.

[0032] This invention improves the ordinary screws on the inspection cover 3 of the centrifugal fan at the inspection port 2 by replacing them with jet-type fixing screws 4. By machining holes in the ordinary screws 5 and combining them with an air pipe connector I6, it not only secures the inspection cover 3 but also allows compressed air to be sprayed through the jet-type fixing screws 4 onto the turbine surface inside the centrifugal fan, preventing dust from adhering to the turbine surface. Simultaneously, by improving the connecting bolts between the duct flange 9 and the connection hole at the lower part of the centrifugal fan housing by replacing them with jet-rod type fixing screws 10, it not only secures the duct flange 9 to the centrifugal fan housing but also sprays air onto the condensate drain outlet of the centrifugal fan, preventing dirt accumulation at the condensate drain outlet. The compressed air supply to the jet-type fixing screw 4 and the jet rod-type fixing screw 10 is connected and combined through the air pipe 20, air source switch 19, solenoid valve 18, and filter pressure reducing valve 17 to realize the automatic cleaning function of the fan. This can effectively solve the problem of dust adhesion on the surface of the centrifugal fan turbine and dirt accumulation at the condensate collection port, reduce the labor intensity of fan cleaning, and extend the service life of the fan.

[0033] This invention achieves automatic cleaning of the centrifugal fan without altering its structure by improving the ordinary connecting screws of the inspection cover and the connecting bolts of the duct flange. The structure is novel and easy to manufacture.

[0034] During use, the cleaning time can be set according to the centrifugal fan's operating status. During preheating: blow once every 1 minute for 10 seconds; during production: blow once every 5 minutes for 20 seconds; at the end of production: continuous blowing for 3 minutes. This process can also be automatically controlled by a controller, the control program of which is as follows:

[0035]

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic cleaning device for a turbine centrifugal fan, comprising a centrifugal fan housing (1), wherein the centrifugal fan housing (1) is provided with an inspection port (2), the inspection port (2) is covered by an inspection cover (3), an air inlet (8) is provided on one side of the centrifugal fan housing (1), an air duct flange (9) for connecting an air duct is provided on the air inlet (8), and a condensate drain outlet for connecting a condensate drain pipe (7) is provided at the lower part of the other side of the centrifugal fan housing (1), characterized in that: The inspection cover (3) is fixed to the centrifugal fan housing (1) around the perimeter by a plurality of evenly arranged jet-type fixing screws (4), covering the inspection port (2). The duct flange (9) opposite to the condensate discharge port and the connection hole of the centrifugal fan housing (1) are fixedly connected by a jet rod type fixing screw (10). The nozzle of the jet rod type fixing screw (10) extends into the lower part of the inner cavity of the centrifugal fan housing (1). The plurality of jet-type fixing screws (4) and the jet rod type fixing screw (10) are interconnected through an air pipe (20) and connected to an air source. Each of the jet-type fixing screws (4) includes a common screw (5) and an air pipe connector I (6). The common screw (5) has a through screw jet hole (5-1) formed inside by drilling. The air outlet end of the air pipe connector I (6) is sealed and fixedly connected to one end of the nut of the common screw (5). The jet rod type fixing screw (10) includes an air pipe connector II (11), a threaded jet rod (13), and an extension jet rod (15). The air pipe connector II (11) is connected to an air pipe (20) at its inlet end. The air pipe connector II (11) is connected to one end of the threaded jet rod (13) via connector I (12). The other end of the threaded jet rod (13) is connected to one end of the extension jet rod (15) via connector II (14). The other end of the extension jet rod (15) is a jet nozzle. The threaded jet rod (13) The outer surface is provided with an external thread (13-1). The threaded blower rod (13) passes through the connecting hole corresponding to the lower part of the air duct flange (9) and the centrifugal fan housing (1) and is connected by screwing it with two fixing nuts (16). The air pipe connector II (11) connected to one end of the threaded blower rod (13) is placed outside the centrifugal fan housing (1) and connected to the air pipe (20). The extended blower rod (15) connected to the other end of the threaded blower rod (13) is placed inside the centrifugal fan housing (1) and corresponds to the position of the condensate drain.

2. The automatic cleaning device for a turbine centrifugal fan according to claim 1, characterized in that: The air outlet end of the air pipe connector I (6) and the nut end of the ordinary screw (5) are fixedly connected by welding.

3. The automatic cleaning device for a turbine centrifugal fan according to claim 1, characterized in that: The air outlet end of the tracheal connector I (6) is sealed and screwed onto one end of the nut of the ordinary screw (5) through a sealing ring and threaded structure.

4. The automatic cleaning device for a turbine centrifugal fan according to claim 1, characterized in that: The tracheal connector II (11) is a rotary tracheal connector, and both connector I (12) and connector II (14) are hexagonal connectors with internal threads for connection inside.

5. The automatic cleaning device for a turbine centrifugal fan according to claim 1, characterized in that: It also includes a filter pressure regulating valve (17), a solenoid valve (18) and an air source switch (19). The plurality of jet-type fixing screws (4) and a jet rod-type fixing screw (10) are connected to the filter pressure regulating valve (17) through an air pipe (20). The filter pressure regulating valve (17) is connected to the solenoid valve (18) through an air pipe (20). The solenoid valve (18) is connected to the air source switch (19) through an air pipe (20).

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