A centrifugal fan casing cleaning device

Abstract

This utility model discloses a centrifugal fan volute cleaning device, belonging to the field of fan technology. It includes a filter screen and a main body with an air inlet and an air outlet. A positioning ring is fixedly installed on the main body. The filter screen is embedded in an annular cavity between the positioning ring and the surface of the main body, forming a rotatable connection with the positioning ring. The positioning ring has an insertion port for accommodating a baffle that can be slidably inserted between the main body and the filter screen. A valve assembly is provided near the air outlet on the main body to guide some airflow out of the main body, directing some airflow towards the baffle near the filter screen. This centrifugal fan volute cleaning device uses a baffle to clean the filter screen, and the valve assembly directs some airflow towards the baffle near the filter screen. Dust on the filter screen can fall off under the close-range or strong blowing of the air.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a centrifugal fan casing cleaning device. Background Technology

[0002] The volute of a centrifugal fan is a spiral shell structure. Its principle is to throw the air in the inlet through the impeller until it is guided to the outlet.

[0003] To improve the cleanliness of the exhaust gas, existing centrifugal fans typically have a dust cover installed at the air inlet of the volute.

[0004] Because the filter screen is located at the air inlet of the centrifugal fan, the centrifugal fan is subjected to a traction force into the vortex shell during operation. Therefore, the existing filter screen is firmly installed with the centrifugal fan, which makes it more troublesome to prevent dust adhering to the filter screen from entering the vortex shell when cleaning the centrifugal fan. Usually, the filter screen can only be removed first for cleaning.

[0005] To address the above problems, a centrifugal fan casing cleaning device is proposed. Utility Model Content

[0006] The purpose of this utility model is to solve the problems in the prior art by proposing a centrifugal fan volute cleaning device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a centrifugal fan casing cleaning device, comprising a filter screen and a main body having an air inlet and an air outlet. A positioning ring coaxially arranged with the air inlet is fixedly installed on the main body. The filter screen is embedded in an annular cavity between the positioning ring and the surface of the main body, and forms a rotatable connection with the positioning ring. The positioning ring has an insertion port for accommodating a baffle that can be slidably inserted between the main body and the filter screen. The baffle is used to block a portion of the air inlet near the ground. A valve assembly is provided on the main body near the air outlet to guide some air out of the main body, so that some air is blown towards the side of the baffle near the filter screen. The diameter of the annular cavity is larger than the diameter of the air inlet. A second waste discharge port connecting the annular cavity to the outside is provided on the positioning ring near the ground.

[0008] The present invention is further configured such that: the end face of the baffle facing the filter screen is formed into a shell structure, so as to form a state in which it fits the filter screen with its contour; a first waste discharge port is provided at the position of the baffle near the ground, and the first waste discharge port is connected to the second waste discharge port.

[0009] The present invention is further configured such that: the side of the baffle is integrally formed with an operating end for maintaining the position of the insertion port.

[0010] The present invention is further configured such that the vertical cross-section of the baffle is a fan-shaped structure with an arc of not less than 180 degrees.

[0011] The present invention is further configured such that: a plurality of elastically deformable buckles are fixedly provided on the inner wall of the positioning ring surrounding the filter screen, and the buckles can clamp the positioning ring with the filter screen.

[0012] The present invention is further configured such that: the valve assembly includes a triangular ball valve fixedly disposed within the main body, the valve body of the triangular ball valve being disposed outside the main body and connected to an air intake pipe.

[0013] The present invention is further configured such that: the triangular ball valve has a T-shaped structure, and the triangular ball valve is arranged in a cross section perpendicular to the air outlet on the structural axis within the main body.

[0014] In summary, this utility model has the following beneficial effects: when cleaning the filter screen, a baffle is set up, and through the pipe valve assembly, some air is blown towards the side of the baffle close to the filter screen. The dust on the filter screen can fall off the filter screen under the close distance or strong blowing of the wind. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a cross-sectional view of the main body of this utility model.

[0016] In the diagram: 1. Main body; 11. Air inlet; 12. Air outlet; 2. Filter screen; 21. Buckle; 3. Positioning ring; 31. Second waste discharge port; 4. Baffle; 5. Insertion port; 6. Triangular ball valve; 7. Air vent pipe; 8. First waste discharge port. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] A centrifugal fan casing cleaning device, such as Figures 1 to 3As shown, the device includes a filter screen 2 and a main body 1 with an air inlet 11 and an air outlet 12. The diameter of the main body 1 gradually increases around its periphery. An impeller is installed inside the main body 1. When the impeller rotates, it blows the air from the air inlet 11 toward the air outlet 12. A positioning ring 3 is fixedly installed on the main body 1 and is arranged coaxially with the air inlet 11. That is, the inner diameter of the positioning ring 3 is coaxial with the air inlet 11. Considering the production and application of the equipment, the inner diameter of the positioning ring 3 should not be less than the inner diameter of the air inlet 11. The filter screen 2 is embedded in the annular cavity between the positioning ring 3 and the surface of the main body 1 and forms a rotatable connection with the positioning ring 3. That is, when the centrifugal fan is running normally, the filter screen 2 can maintain a stable position and block some air dust on the filter screen 2. In this embodiment, a number of elastically deformable buckles 21 are fixedly installed around the inner wall of the positioning ring 3. The buckles 21 can clamp the positioning ring 3 with the filter screen 2.

[0019] like Figures 1 to 3 As shown, in order to effectively clean the dust on the filter screen 2, the positioning ring 3 has an insertion port 5 that can accommodate the baffle 4 to slide between the main body 1 and the filter screen 2. The baffle 4 is used to block part of the cross section of the air inlet 11 near the ground. The main body 1 is provided with a pipe valve assembly near the air outlet 12 to guide part of the air out of the main body 1, so that part of the air blows towards the side of the baffle 4 near the filter screen 2. The dust on the filter screen 2 can fall off the filter screen 2 under the close distance or strong blowing of the wind. Considering that there should be enough space to accommodate the dust falling off the filter screen 2, the diameter of the annular chamber is larger than the diameter of the air inlet 11, that is, the dust falls at the position between the diameter of the annular chamber and the inner diameter of the positioning ring 3. In order to effectively clean the dust at this position, the positioning ring 3 has a second waste discharge port 31 near the ground that connects the annular chamber to the outside. After cleaning the area where the baffle 4 is projected onto the filter screen 2, force can be applied to the filter screen 2 to make it rotate, so that the area not originally covered by the baffle 4 rotates to a position close to the ground, and cleaning can continue. After cleaning is completed, the baffle 4 can be removed from the annular chamber. Therefore, in order to facilitate the installation and disassembly of the baffle 4, the side of the baffle 4 is integrally formed with an operating end that holds the position of the insertion port 5. In order to reduce the number of times the filter screen 2 is rotated due to cleaning, the vertical cross section of the baffle 4 is a fan-shaped structure with an arc of not less than 180 degrees. Considering the cleanliness of the area between the baffle 4 and the filter screen 2, the end face of the baffle 4 facing the filter screen 2 is formed into a shell structure to form a state in which it fits the filter screen 2 in contour. The baffle 4 has a first waste discharge port 8 near the ground, and the first waste discharge port 8 is connected to the second waste discharge port 31.

[0020] like Figures 1 to 3As shown, the valve assembly includes a triangular ball valve 6 fixedly installed inside the main body 1. The valve body of the triangular ball valve 6 is located outside the main body 1 and is connected to an air intake pipe 7. In order to maximize airflow at the position of the triangular ball valve 6 during normal use of the centrifugal fan, the triangular ball valve 6 has a T-shaped structure. The triangular ball valve 6 is arranged perpendicular to the cross-section of the air outlet on the structural axis inside the main body 1, that is, gas can pass normally through the inside of the triangular ball valve 6 when the valve body is closed.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] 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. A centrifugal fan casing cleaning device, comprising a filter screen (2) and a main body (1) having an air inlet (11) and an air outlet (12), characterized in that: A positioning ring (3) is fixedly installed on the main body (1) and arranged coaxially with the air inlet (11). The filter screen (2) is embedded in the annular cavity between the positioning ring (3) and the surface of the main body (1) and forms a rotatable connection with the positioning ring (3). The positioning ring (3) has an insertion port (5) that can accommodate the baffle (4) to slide between the main body (1) and the filter screen (2). The baffle (4) is used to block part of the air inlet (11) near the ground. The main body (1) is provided with a pipe valve assembly near the air outlet (12) to guide part of the air out of the main body (1) so that part of the air blows towards the side of the baffle (4) near the filter screen (2). The diameter of the annular cavity is larger than the diameter of the air inlet (11). The positioning ring (3) has a second waste discharge port (31) near the ground that connects the annular cavity to the outside.

2. The centrifugal fan casing cleaning device according to claim 1, characterized in that: The end face of the baffle (4) facing the filter screen (2) is formed into a shell structure to form a state in which it fits the filter screen (2) in contour. The baffle (4) has a first waste discharge port (8) near the ground, and the first waste discharge port (8) is connected to the second waste discharge port (31).

3. The centrifugal fan casing cleaning device according to claim 1, characterized in that: The side of the baffle (4) is integrally formed with an operating end that holds the position of the insertion port (5).

4. The centrifugal fan casing cleaning device according to claim 1, characterized in that: The vertical cross section of the baffle (4) is a fan-shaped structure with an arc of not less than 180 degrees.

5. A centrifugal fan casing cleaning device according to claim 1, characterized in that: The filter screen (2) is fixedly provided with several elastically deformable buckles (21) around the inner wall of the positioning ring (3), and the buckles (21) can clamp the positioning ring (3) with the filter screen (2).

6. A centrifugal fan casing cleaning device according to any one of claims 1-5, characterized in that: The valve assembly includes a triangular ball valve (6) fixedly installed inside the main body (1). The valve body of the triangular ball valve (6) is located outside the main body (1) and is connected to an air vent pipe (7).

7. A centrifugal fan casing cleaning device according to claim 6, characterized in that: The triangular ball valve (6) has a T-shaped structure, and the triangular ball valve (6) is arranged in a cross section perpendicular to the air outlet within the structural axis of the main body (1).

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