Air inlet foreign matter suction prevention device of air suction fan

Abstract

The utility model discloses a convenient to change's air -inducing machine entrance prevents foreign matter suction device, including installation pipe, the fixed connection of installation pipe has first mounting plate, and one side of first mounting plate is equipped with the protection pipe, and the top of protection pipe is equipped with the clamping groove, and the clamping groove is clamped with the clamping plate, and the bottom fixed connection of clamping plate has the filter screen cover, and the filter screen cover is located in the protection pipe, both sides outer wall of protection pipe all are fixedly connected with first connecting lug, and the top fixed connection of first connecting lug has the location screw rod, both ends of clamping plate all are fixedly connected with two second connecting lug, and the top of location screw rod passes through second connecting lug, and the top threaded connection of location screw rod has the second nut. The utility model discloses through the clamping of clamping plate and clamping groove and installs the filter screen cover in installation pipe, and through the location screw rod, second nut is fixed to clamping plate, thereby the quick disassembly maintenance replacement of filter screen cover is convenient, and then avoids the blockage of filter screen cover.

Description

Technical Field

[0001] This utility model relates to the field of induced draft fan technology, and in particular to an easily replaceable inlet device for preventing foreign objects from being sucked in. Background Technology

[0002] An induced draft fan is an industrial device that uses the negative pressure generated by the rotation of an impeller to extract gas. However, if foreign objects enter the fan through the inlet, it can damage the blades, overload the motor, or even cause fires and other safety accidents. If foreign objects jam the moving blades, it can also cause airflow fluctuations, abnormal current, and increased vibration, which may damage bearings and other components over time. Therefore, filters and other devices to prevent foreign objects from being sucked in are often installed at the fan inlet to reduce the amount of impurities entering the fan.

[0003] Currently, the foreign object suction prevention devices used in existing induced draft fans are inconvenient to clean and replace regularly during use, easily leading to filter clogging and affecting the fan's suction efficiency. Therefore, in order to improve the performance of induced draft fans and to promote technological advancement and enhance core technological competitiveness in the industry, this application proposes a new implementation scheme that differs from the existing fan inlet foreign object suction prevention devices and application methods. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing anti-foreign object suction devices used in induced draft fans are inconvenient to clean and replace regularly, which easily leads to filter clogging. Therefore, this invention proposes an easy-to-replace anti-foreign object suction device for induced draft fan inlets.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A replaceable foreign object suction device for an induced draft fan inlet includes an installation pipe, a first installation plate fixedly connected to the installation pipe, a protective pipe on one side of the first installation plate, a slot at the top of the protective pipe, a retaining plate engaged in the slot, a filter screen fixedly connected to the bottom of the retaining plate, the filter screen located inside the protective pipe, first connecting ears fixedly connected to both outer walls of the protective pipe, positioning screws fixedly connected to the top of the first connecting ears, two second connecting ears fixedly connected to both ends of the retaining plate, the top of the positioning screws passing through the second connecting ears, and a second nut threadedly connected to the top of the positioning screws.

[0006] Furthermore, a second mounting plate is provided at one end of the protective tube, and a flexible tube is fixedly connected to one side of the second mounting plate.

[0007] Furthermore, a plurality of mounting screws are fixedly connected to one side of the first mounting plate. One end of the mounting screw passes through the protective tube and the second mounting plate, and a first nut is threaded onto one end of the mounting screw.

[0008] Furthermore, a sealing strip is adhered to the inner wall of the slot, and the sealing strip contacts the card plate.

[0009] Furthermore, a lifting handle is fixedly connected to the top of the card plate, and the outer wall of the lifting handle is provided with anti-slip grooves.

[0010] Furthermore, both the first mounting plate and the second mounting plate are provided with annular grooves, and both ends of the protective tube are fixedly connected with protruding rings, which are inserted into the annular grooves.

[0011] Furthermore, a sealing gasket is provided between the convex ring and the annular groove.

[0012] The beneficial effects of this utility model are as follows: 1. The filter screen is installed in the installation tube by snapping the plate and the slot. The plate is fixed by the positioning screw and the second nut, which facilitates the quick disassembly, maintenance and replacement of the filter screen, thereby avoiding clogging of the filter screen.

[0013] 2. The connection between the convex ring and the annular groove facilitates the connection between the protective tube and the first and second mounting plates. Then, the mounting screws are passed through the pre-drilled hole at the end of the protective tube and the matching through hole of the second mounting plate in sequence. Finally, the first nut is tightened to fix the protective tube and the flexible tube to one end of the mounting tube. The operation is simple, convenient and quick. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a replaceable anti-foreign object suction device for an induced draft fan inlet, as proposed in this utility model. Figure 2 This is a schematic diagram of the explosion structure of an easily replaceable anti-foreign object suction device for the inlet of an induced draft fan, as proposed in this utility model. Figure 3 This is a cross-sectional structural schematic diagram of an easily replaceable anti-foreign object suction device for an induced draft fan inlet, as proposed in this utility model. Figure 4 This is a schematic diagram of the installation state of an easily replaceable anti-foreign object suction device for the inlet of an induced draft fan, as proposed in this utility model.

[0015] In the diagram: 1. Mounting pipe; 2. First mounting plate; 3. Protective pipe; 4. Mounting screw; 5. First nut; 6. Slot; 7. Sealing strip; 8. Clamping plate; 9. Filter screen; 10. First connecting ear; 11. Positioning screw; 12. Second nut; 13. Lifting handle; 14. Annular groove; 15. Protruding ring; 16. Sealing gasket; 17. Second mounting plate; 18. Flexible connecting pipe; 19. Exhaust fan body; 20. Air inlet. Detailed Implementation

[0016] 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-4 A replaceable foreign object suction device for an induced draft fan includes an installation pipe 1 and an induced draft fan body 19. One end of the induced draft fan body 19 is provided with an air inlet 20. The installation pipe 1 is connected to the air inlet 20 by a flange. The installation pipe 1 is integrally formed with a first installation plate 2. A protective pipe 3 is provided on one side of the first installation plate 2. The top of the protective pipe 3 is provided with a slot 6. A retaining plate 8 is snapped into the slot 6. A filter screen 9 is fixed to the bottom of the retaining plate 8 by bolts. The filter screen 9 is located inside the protective pipe 3 and uses a 10-30 mesh high-density metal mesh (or wear-resistant plastic mesh) with a mesh size of 0.5-5mm. It can intercept large particles of foreign objects such as leaves, stones, fibers, and dust, with an interception efficiency of ≥98%, preventing foreign objects from entering the induced draft fan impeller and causing wear, jamming, or breakage. Both sides of the outer wall of the protective tube 3 are integrally formed with first connecting ears 10. The top of the first connecting ears 10 is welded with a positioning screw 11. Both ends of the clamping plate 8 are integrally formed with two second connecting ears. The top of the positioning screw 11 passes through the second connecting ear. The top of the positioning screw 11 is threadedly connected with a second nut 12. The filter screen 9 is installed in the installation tube 1 by the clamping of the clamping plate 8 and the clamping groove 6. At the same time, the top of the positioning screw 11 passes through the through hole of the second connecting ear. Then the second nut 12 is tightened to fix the clamping plate 8, which facilitates the quick disassembly, maintenance and replacement of the filter screen 9.

[0018] One end of the protective tube 3 is provided with a second mounting plate 17, and a flexible tube 18 is integrally formed on one side of the second mounting plate 17. The flexible tube 18 is made of heat-resistant and wear-resistant rubber material.

[0019] Multiple mounting screws 4 are welded to one side of the first mounting plate 2. One end of the mounting screw 4 passes through the protective tube 3 and the second mounting plate 17. The first nut 5 is threaded to one end of the mounting screw 4, which facilitates the quick and easy fixing connection of the mounting tube 1, the protective tube 3, and the flexible tube 18.

[0020] The top of the card plate 8 is fixed with a lifting handle 13 by bolts. The outer wall of the lifting handle 13 is provided with anti-slip grooves, which makes it easy to quickly remove the card plate 8 and the filter screen 9 without the need for professional tools.

[0021] Both the first mounting plate 2 and the second mounting plate 17 are provided with annular grooves 14, and both ends of the protective tube 3 are integrally formed with protruding rings 15. The protruding rings 15 are inserted into the annular grooves 14 to accurately position the relative positions of the protective tube 3 with the first mounting plate 2 and the second mounting plate 17, so as to avoid gaps at the connection.

[0022] A sealing gasket 16 is provided between the convex ring 15 and the annular groove 14. A sealing strip 7 is bonded to the inner wall of the slot 6. The sealing strip 7 is made of silicone or nitrile rubber. The sealing strip 7 contacts the card plate 8. The airflow leaks from the joint of the sealing gasket 16 and the sealing strip 7, while preventing unfiltered air, water vapor and impurities from seeping in.

[0023] The working principle of this embodiment is as follows: In use, firstly, the mounting pipe 1 is fixedly connected to the air inlet 20 through the flange. Then, the protruding ring 15 at one end of the protective pipe 3 is inserted into the annular groove 14 of the first mounting plate 2. Then, the protruding ring 15 at the other end of the protective pipe 3 is inserted into the annular groove 14 of the second mounting plate 17. The mounting screw 4 passes through the reserved hole at the end of the protective pipe 3 and the corresponding through hole of the second mounting plate 17 in sequence. Then, the first nut 5 is tightened to fix the protective pipe 3 and the flexible pipe 18 to one end of the mounting pipe 1. Then, the filter screen 9 is installed in the installation tube 1 by snapping the card plate 8 with the card slot 6, while the top of the positioning screw 11 passes through the second connecting ear hole, and the second nut 12 is tightened to fix the card plate 8, thereby fixing the filter screen 9 in place. When running, the induced draft fan body 19 is started, and the airflow enters the protective pipe 3 from the outside through the flexible pipe 18. Then, the airflow passes through the filter screen 9, and foreign objects are intercepted on the outside by the filter screen 9. The clean airflow enters the induced draft fan body 19 through the installation pipe 1 to participate in the work. When the filter screen 9 needs to be disassembled, maintained and replaced, disconnect the power supply to the blower body 19, then unscrew the second nut 12, then grasp the lifting handle 13 and pull upwards with force, thereby moving the clamping plate 8 upwards and disengaging it from the clamping slot 6, so that the filter screen 9 can be taken out from the protective tube 3 for replacement with a new filter screen 9, and then reset the filter screen 9 according to the assembly process.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A replaceable inlet anti-foreign object suction device for an induced draft fan, comprising an installation pipe (1), characterized in that, The mounting tube (1) is fixedly connected to a first mounting plate (2). A protective tube (3) is provided on one side of the first mounting plate (2). A slot (6) is provided on the top of the protective tube (3). A card plate (8) is snapped into the slot (6). A filter screen cover (9) is fixedly connected to the bottom of the card plate (8). The filter screen cover (9) is located inside the protective tube (3). A first connecting ear (10) is fixedly connected to both outer walls of the protective tube (3). A positioning screw (11) is fixedly connected to the top of the first connecting ear (10). Two second connecting ears are fixedly connected to both ends of the card plate (8). The top end of the positioning screw (11) passes through the second connecting ear. A second nut (12) is threadedly connected to the top end of the positioning screw (11).

2. The easily replaceable foreign object suction device for the inlet of an induced draft fan according to claim 1, characterized in that, One end of the protective tube (3) is provided with a second mounting plate (17), and a flexible tube (18) is fixedly connected to one side of the second mounting plate (17).

3. The easily replaceable foreign object suction device for the inlet of an induced draft fan according to claim 1, characterized in that, A plurality of mounting screws (4) are fixedly connected to one side of the first mounting plate (2). One end of the mounting screw (4) passes through the protective tube (3) and the second mounting plate (17), and one end of the mounting screw (4) is threadedly connected to a first nut (5).

4. The easily replaceable foreign object suction device for the inlet of an induced draft fan according to claim 1, characterized in that, A sealing strip (7) is bonded to the inner wall of the slot (6), and the sealing strip (7) is in contact with the card plate (8).

5. A replaceable foreign object suction device for an induced draft fan inlet according to claim 1, characterized in that, The top of the card plate (8) is fixedly connected to a lifting handle (13), and the outer wall of the lifting handle (13) is provided with an anti-slip groove.

6. The easily replaceable foreign object suction device for the inlet of an induced draft fan according to claim 1, characterized in that, Both the first mounting plate (2) and the second mounting plate (17) are provided with annular grooves (14), and both ends of the protective tube (3) are fixedly connected with protruding rings (15), which are inserted into the annular grooves (14).

7. A replaceable foreign object suction device for an induced draft fan inlet according to claim 6, characterized in that, A sealing gasket (16) is provided between the convex ring (15) and the annular groove (14).

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