Centrifugal fan capable of discharging oil dirt

Abstract

The utility model discloses a centrifugal fan capable of discharging oil dirt, and relates to the technical field of centrifugal fans. The fan structurally comprises a shell, an impeller and a motor, a horizontally-arranged circular pipe is fixed to the bottom of the machine shell in a penetrating mode. A scale discharge pipe which vertically extends downwards is fixed on the circular pipe in a penetrating manner; a dredging device is in sliding fit in the circular tube; the outer wall of one end of the outer side of the circular pipe is provided with axially symmetric guide channels. The dredging device is in threaded connection with a handle; the outer side end of the circular tube is provided with an internal thread and is in threaded connection with an end cover; and a spring is arranged between the end cover and the dredging device. The dredging device is dragged by holding the handle, oil dirt deposited in the machine shell can be quickly scraped and pushed to the round pipe and discharged from the dirt discharging pipe, compared with a traditional cleaning mode, the cleaning time is greatly shortened, and operation is easy and direct; in the cleaning process, the centrifugal fan does not need to be shut down, so that operation and maintenance of equipment are more convenient, related work such as production or ventilation cannot be interrupted due to the cleaning process, and working efficiency and continuity are improved.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal fan technology, and in particular relates to a centrifugal fan capable of removing oil sludge. Background Technology

[0002] Centrifugal fans, as driven fluid machines that rely on input mechanical energy to increase gas pressure and discharge gas, are widely used in many fields such as ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings. In places like resin production processes, industrial frying workshops, and catering kitchens, centrifugal fans accumulate a large amount of sticky substances, i.e., grease, inside their casings due to prolonged use. This grease is mainly formed by the gradual deposition of grease particles from the air during the centrifugal fan's operation. Over time, the grease accumulates to a considerable thickness at the bottom of the casing, not only affecting the centrifugal fan's appearance but also reducing its heat dissipation performance, thus impacting the equipment's normal operation and lifespan. Traditional centrifugal fan cleaning methods require shutdown and are cumbersome and labor-intensive. Utility Model Content

[0003] The purpose of this utility model is to provide a centrifugal fan that can drain oil sludge. By combining a drainer, end cap, handle, spring and casing, it is convenient to clean the oil sludge inside the centrifugal fan.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a centrifugal fan capable of removing oil sludge, comprising a casing, an impeller, and a motor; a horizontally arranged circular tube is fixedly inserted through the bottom of the casing; a vertically extending downward sludge discharge pipe is fixedly inserted through the circular tube; a drainer is slidably fitted inside the circular tube; an axisymmetrically arranged guide groove is formed on the outer wall of one end of the circular tube; a handle is threadedly connected to the drainer; an internal thread is formed on the outer end of the circular tube, and an end cap is threadedly connected to it; a spring is installed between the end cap and the drainer.

[0006] As a preferred embodiment of this utility model, the dredging device includes a cylindrical plunger rod; a horizontally arranged dredging plate is fixed to the inner end of the cylindrical plunger rod; a circular plate with the same diameter as the cylindrical plunger rod is fixed to the end of the dredging plate; a guide block that cooperates with the two guide channels is fixed to the outer end of the cylindrical plunger rod; and an internal thread hole that is threaded to the handle is opened at the upper and lower ends of the guide block.

[0007] As a preferred embodiment of this utility model, a row of inclined scrapers is fixed on the lower surface of the dredging plate; the inner end of the cylindrical piston rod located above the dredging plate has an arc-shaped opening groove that smoothly transitions with the inner wall of the housing.

[0008] As a preferred embodiment of this utility model, the end cap includes a round cap; a threaded post is fixed to the inner wall of the round cap and is coaxially arranged and threadedly connected to the outer end of the round tube; a hexagonal prism is provided on the outer end face of the round cap; a cylindrical guide rod is fixed to the end face of the threaded post and is coaxially arranged; the cylindrical plug rod and the guide block are provided with a blind hole that cooperates with the cylindrical guide rod; and the spring is sleeved on the cylindrical guide rod.

[0009] As a preferred embodiment of this utility model, the handle includes a handle rod; one end of the handle rod is provided with a threaded joint that is threadedly connected to the internal threaded hole; and a protective sleeve is provided on the outer wall of the handle rod.

[0010] This utility model has the following beneficial effects:

[0011] 1. This utility model allows for the rapid scraping and pushing of accumulated grease inside the machine casing towards the circular pipe and out through the discharge pipe by holding the handle and dragging the drainer. Compared to traditional cleaning methods, this significantly shortens cleaning time, and the cleaning process is simple and direct. The centrifugal fan does not need to be stopped during the cleaning process, making equipment operation and maintenance more convenient. Production or ventilation work will not be interrupted due to the cleaning process, thus improving work efficiency and continuity.

[0012] 2. This utility model, through the coordinated design of guide channels and guide blocks, internal threaded holes and handles, threaded columns and end caps, and cylindrical guide rods and blind holes, ensures the installation accuracy and movement stability of each component, enabling the dredging device to reciprocate smoothly within the circular tube, thereby improving the reliability and durability of the entire device.

[0013] 3. The spring design of this utility model enables the drainer to stably block the round pipe under normal conditions, preventing abnormal exhaust from the casing; when the internal pressure of the centrifugal fan reaches its limit, the drainer can move outward to relieve pressure and automatically discharge oil sludge. This structure not only ensures the stability of daily operation, but also automatically handles the deposited oil sludge when needed.

[0014] 4. This utility model utilizes the circular plate on the inner side of the guide plate to scrape away grease inside the casing during reciprocating motion, effectively improving the overall fluidity of the grease and making previously difficult-to-move grease easier to clean. The design of multiple inclined scrapers increases the contact area between the guide plate and the grease during a single cleaning cycle, thereby scraping off more grease and further improving the cleaning effect.

[0015] 5. The handle of this utility model can be installed facing up or down, which is convenient to adjust according to specific installation conditions and operational needs, improving the adaptability of the device to different environments and making it convenient for operators to use in different scenarios.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the centrifugal fan capable of removing oil stains according to this utility model.

[0019] Figure 2 for Figure 1 The front view.

[0020] Figure 3 This is a partial sectional view of the present invention.

[0021] Figure 4 This is a schematic diagram of the drainage device.

[0022] Figure 5 This is a schematic diagram of the end cap structure.

[0023] Figure 6 This is a schematic diagram of the handle.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1-Housing, 2-Drainage device, 3-End cap, 4-Handle, 5-Spring, 11-Round tube, 12-Drainage pipe, 13-Guide channel, 21-Cylindrical plug rod, 22-Drainage plate, 23-Round plate, 24-Guide block, 25-Internal threaded hole, 26-Scraper, 27-Arc-shaped opening groove, 28-Blind hole, 31-Round cap, 32-Threaded column, 33-Hexagonal prism, 34-Cylindrical guide rod, 41-Handle rod, 42-Threaded joint, 43-Sheath tube. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1:

[0028] Please see Figure 1-6 As shown, this utility model is a centrifugal fan capable of removing oil sludge, including a casing 1, an impeller, and a motor. A horizontally arranged circular tube 11 is fixed through the bottom of the casing 1. A vertically extending downward sludge discharge pipe 12 is fixed through the circular tube 11. A drainer 2 is slidably fitted inside the circular tube 11. A symmetrically arranged guide channel 13 is formed on the outer wall of one end of the circular tube 11. A handle 4 is threaded onto the drainer 2. An internal thread is formed on the outer end of the circular tube 11, and an end cap 3 is threaded onto it. A spring 5 is installed between the end cap 3 and the drainer 2. Under the elastic action of the spring 5, the drainer 2 is stably pushed towards the casing 1 to seal the circular tube 11, preventing abnormal exhaust from the casing 1. After prolonged use, a large amount of sticky substance adheres to the inside of the centrifugal fan casing 1. Due to gravity, this substance eventually accumulates to a considerable thickness at the bottom of the casing 1. During cleaning, the handle 4 is held, and the drainer 2 is dragged outward along the circular pipe 11. As the drainer 2 is dragged, the grease inside the casing 1 is scraped and pushed towards the circular pipe 11, eventually being discharged from the drain pipe 12. By repeatedly dragging the drainer 2 with the handle 4, the accumulated grease inside the centrifugal fan can be cleaned quickly and conveniently, without requiring the centrifugal fan to be stopped.

[0029] When the pressure inside the centrifugal fan exerts a thrust on the drainer 2 that exceeds the elastic thrust of the spring 5 under extreme conditions, the drainer 2 moves outward, and the discharge pipe 12 connects with the inner cavity of the casing 1 to achieve pressure relief and automatically discharge the oil deposits inside the casing 1.

[0030] The guide device 2 specifically includes a cylindrical plunger 21. A horizontally arranged guide plate 22 is fixed to the inner end of the plunger 21. A circular plate 23 with the same diameter as the plunger 21 is fixed to the end of the guide plate 22. A guide block 24, which guides and engages with two guide channels 13, is fixed to the outer end of the plunger 21. Each guide block 24 has an internally threaded hole 25 at its upper and lower ends, which is threaded to the handle 4. A row of inclined scrapers 26 is fixed to the lower surface of the guide plate 22. An arc-shaped opening groove 27, which smoothly transitions to the inner wall of the housing 1, is opened on the portion of the inner end of the plunger 21 above the guide plate 22. The end cap 3 specifically includes a circular cap 31. A threaded post 32, coaxially arranged and threaded to the outer end of the circular tube 11, is fixed to the inner wall of the circular cap 31. A hexagonal prism 33 is provided on the outer end face of the circular cap 31. A coaxially arranged cylindrical guide rod 34 is fixed to the end face of the threaded post 32. The cylindrical plunger rod 21 and the guide block 24 are both provided with a blind hole 28 that mates with the cylindrical guide rod 34. The spring 5 is sleeved on the cylindrical guide rod 34. The circular plate 23 at the inner end of the drainer 2 scrapes the oil sludge inside the housing 1 during its reciprocating motion, improving the overall fluidity of the oil sludge. The design of multiple scrapers 26 increases the amount of oil sludge removed during a single cycle of cleaning by the drainer 2.

[0031] Specifically, the handle 4 includes a handle rod 41. One end of the handle rod 41 is provided with a threaded connector 42 that is threaded into the internal threaded hole 25. A protective sleeve 43 is provided on the outer wall of the handle rod 41. The handle 4 can be installed facing upwards or downwards to facilitate operation under specific installation conditions.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A centrifugal fan capable of discharging oil dirt, comprising a casing (1), an impeller and a motor, characterized in that: a horizontally arranged circular pipe (11) is fixed through the bottom of the casing (1); a vertically downward extending dirt discharging pipe (12) is fixed through the circular pipe (11); a dredging device (2) is slidingly fitted in the circular pipe (11); an axisymmetrically arranged guide groove (13) is formed in the outer wall of one end of the circular pipe (11); a handle (4) is threadedly connected to the dredging device (2); an inner thread is formed in the outer end of the circular pipe (11), and an end cover (3) is threadedly connected thereto; a spring (5) is installed between the end cover (3) and the dredging device (2).

2. The oil sludge-able centrifugal fan according to claim 1, wherein, The dredging device (2) comprises a cylindrical plunger rod (21); a horizontally arranged dredging flat plate (22) is fixed to the inner end of the cylindrical plunger rod (21); an end plate (23) with the same diameter as the cylindrical plunger rod (21) is fixed to the end of the dredging flat plate (22); a guide block (24) is fixed to the outer end of the cylindrical plunger rod (21) and is guided by the two guide grooves (13); an inner thread hole (25) is formed in the upper and lower ends of the guide block (24) and is threadedly connected to the handle (4).

3. The oil sludge-able centrifugal fan according to claim 2, wherein, An array of obliquely arranged scrapers (26) is fixed to the lower surface of the dredging flat plate (22); an arc-shaped opening slot (27) is formed in the part of the inner end of the cylindrical plunger rod (21) above the dredging flat plate (22) and is smoothly transitioned with the inner wall of the casing (1).

4. The oil sludge-able centrifugal fan according to claim 2 or 3, characterized in that, The end cover (3) comprises a circular cover (31); a threaded column (32) is fixed to the inner wall of the circular cover (31) and is threadedly connected to the outer end of the circular pipe (11); a hexagonal prism (33) is arranged on the outer end surface of the circular cover (31); a cylindrical guide rod (34) is fixed to the end surface of the threaded column (32); a blind hole (28) is formed in the cylindrical plunger rod (21) and the guide block (24) and is guided by the cylindrical guide rod (34); the spring (5) is sleeved on the cylindrical guide rod (34).

5. The oil sludge-able centrifugal fan of claim 2, wherein, The handle (4) comprises a handle rod (41); a threaded joint (42) is arranged at one end of the handle rod (41) and is threadedly connected to the inner thread hole (25); a sheath pipe (43) is arranged on the outer wall of the handle rod (41).

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