Reinforced centrifugal fan volute structure

Abstract

The utility model discloses a reinforced centrifugal fan volute structure which comprises a fan shell, an air inlet is formed in the front face of the fan shell, a first sealing gasket is arranged on the front face of the fan shell, and a first connecting plate is arranged on the side, away from the fan shell, of the first sealing gasket. The first sealing gasket is mounted on the first connecting plate, the first mounting holes of the first sealing gasket and the first connecting plate are aligned, the first bolts are mounted in the first mounting holes, the first connecting plate is mounted in the inserting groove of the fan shell through the inserting plate, and the inserting plate can be clamped in the inserting groove by pressing the first connecting plate inwards. The first connecting plate and the fan shell are connected through the convex block, the stability degree of the connecting position is increased through the convex block, meanwhile, rapid positioning is achieved through the first bolt and the first mounting hole in the fan shell, the first bolt is screwed into the first nut through a tool, so that the positions of the first connecting plate and the fan shell are fixed, and the firmness of connection is guaranteed through connection of the inserting plate and the inserting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fan volutes, in particular to a reinforced centrifugal fan volute structure. Background Art

[0002] The volute of a centrifugal fan is mainly used to collect and guide the gas thrown out by the rotating blades. In order to facilitate transportation and recycling, centrifugal volutes are generally not connected by welding, but are assembled in a detachable manner.

[0003] According to publication number CN211737575U, a reinforced centrifugal fan volute structure and a centrifugal fan include a volute in the shape of a vortex curved surface, two supporting side plates respectively arranged on both sides of the volute, the two supporting side plates are connected to the volute to form a vortex air duct, a plurality of protruding fins are provided on the two side edges of the volute, a first fixing hole is provided on the fin, and the supporting side plates are provided with a plurality of buckle holes, the plurality of buckle holes correspond to the plurality of fins one by one, the fins pass through the corresponding buckle holes and are bent and flattened on the outer side walls of the supporting side plates, a second fixing hole that is docked with the first fixing hole is provided on the supporting side plates next to each buckle hole, and the second fixing hole is connected to the first fixing hole by a fixing piece. The centrifugal fan adopts the above-mentioned volute, which can improve the stability of the connection between the fins and the buckle holes, avoid the fins from falling out of the buckle holes when subjected to collision and vibration, and improve the firmness of the connection between the volute and the supporting side plates.

[0004] The above-mentioned structures such as fins and buckle holes can improve the firmness of the connection between the volute and the supporting side plate. However, during use, since the buckle holes are provided on the supporting side plate, the sealing performance after installation cannot be guaranteed, and the fins need to be bent after being installed in the buckle holes to complete the fixation, thereby reducing the strength of the fins. After multiple disassembly and installation, they are prone to breakage. Utility Model Content

[0005] The purpose of the present utility model is to provide a reinforced centrifugal fan volute structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a reinforced centrifugal fan volute structure, including a fan casing, an air inlet is provided on the front side of the fan casing, a first sealing gasket is provided on the front side of the fan casing, a first connecting plate is provided on the side of the first sealing gasket away from the fan casing, a first mounting hole is provided on the middle portion of the first connecting plate and the fan casing, a first bolt is slidably connected to the inside of the first mounting hole, a first nut is threadedly connected to the surface of the first bolt, a reinforcing plate is fixedly connected to the side of the first connecting plate away from the first sealing gasket, a plug-in plate is fixedly connected to the side of the reinforcing plate close to the fan casing, a protrusion is fixedly connected to the surface of the plug-in plate, and a plug-in groove is clamped on the surface of the plug-in plate.

[0007] As a further preferred embodiment of the present technical solution, there are multiple first mounting holes, the number of the first bolts corresponds to the number of the first mounting holes, the first nuts are located inside the fan housing, there are four reinforcing plates, and the plug-in slots are fixedly connected to the fan housing.

[0008] As a further preferred embodiment of the present technical solution, a protective plate is fixedly connected to the inner wall of the fan housing, a mounting plate is fixedly connected to the top end of the fan housing, and a second mounting hole is opened in the middle of the mounting plate.

[0009] As a further preferred embodiment of the present technical solution, a second sealing gasket is provided on the side of the fan housing away from the first sealing gasket, a second connecting plate is provided on the side of the second sealing gasket away from the fan housing, a connecting tube is fixedly connected to the side of the second connecting plate away from the second sealing gasket, a second bolt is slidably connected to the middle part of the second connecting plate, the surface of the second bolt is threadedly connected to the first tooth plate, and the surface of the second bolt is threadedly connected to the second tooth plate.

[0010] As a further preferred embodiment of the present technical solution, the second bolt passes through the fan casing and extends into the interior thereof, the first notch plate and the second notch plate are both located inside the fan casing, and the second notch plate is clamped inside the first notch plate.

[0011] As a further preferred embodiment of the present technical solution, an air inlet tube is provided on the side of the first connecting plate away from the first sealing gasket, a third bolt is provided in the middle of the air inlet tube, a spring washer is movably sleeved on the surface of the third bolt, and a second nut is threadedly connected to the surface of the third bolt.

[0012] As a further preferred embodiment of the present technical solution, the air inlet tube adopts a conical structure, the third bolt passes through the first connecting plate and extends into the interior thereof, and the spring washer is in contact with the first connecting plate.

[0013] The utility model provides a reinforced centrifugal fan volute structure, which has the following beneficial effects:

[0014] (1) The utility model installs the first sealing gasket on the first connecting plate, aligns the first mounting holes of the two, installs the first bolt in the first mounting hole, installs the first connecting plate in the plug-in slot of the fan housing through the plug-in plate, presses the first connecting plate inward to make the plug-in slot snap into place, and increases the stability of the connection by the protrusion. At the same time, the first bolt and the first mounting hole on the fan housing are quickly positioned, and the first bolt is screwed into the first nut using a tool, thereby fixing the position of the first connecting plate and the fan housing, and ensuring the firmness of the connection by the connection between the plug-in plate and the plug-in slot.

[0015] (2) The utility model installs the second bolt on the second connecting plate, installs the second sealing gasket on the second connecting plate through the second bolt, installs the second connecting plate and the second sealing gasket on the back of the fan housing through the second bolt, and installs the first tooth plate and the second tooth plate on the surface of the second bolt in sequence. After the position is fixed, the rack on the second tooth plate is stuck in the tooth groove of the first tooth plate and conflicts with each other, thereby avoiding displacement of the centrifugal fan and the second bolt during operation, and preventing it from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the back structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the expanded structure of the first connecting plate and the first sealing gasket of the utility model;

[0020] Figure 5 This is a schematic diagram of the expanded structure of the second connecting plate and the second sealing gasket of the present invention.

[0021] In the figure: 1. Fan housing; 2. Air inlet; 3. First sealing gasket; 4. First connecting plate; 5. First mounting hole; 6. First bolt; 7. First nut; 8. Reinforcement plate; 9. Insert plate; 10. Bump; 11. Insert slot; 12. Protective plate; 13. Mounting plate; 14. Second mounting hole; 15. Second sealing gasket; 16. Second connecting plate; 17. Connecting tube; 18. Second bolt; 19. First tooth plate; 20. Second tooth plate; 21. Air inlet tube; 22. Third bolt; 23. Spring washer; 24. Second nut. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] The utility model provides a technical solution: Figure 1 and Figure 5As shown, in this embodiment, a reinforced centrifugal fan volute structure includes a fan casing 1, an air inlet 2 is opened on the front of the fan casing 1, a first sealing gasket 3 is provided on the front of the fan casing 1, a first connecting plate 4 is provided on the side of the first sealing gasket 3 away from the fan casing 1, a first mounting hole 5 is provided in the middle of the first connecting plate 4 and the fan casing 1, a first bolt 6 is slidably connected to the inside of the first mounting hole 5, a first nut 7 is threadedly connected to the surface of the first bolt 6, a reinforcing plate 8 is fixedly connected to the side of the first connecting plate 4 away from the first sealing gasket 3, a plug-in plate 9 is fixedly connected to the side of the reinforcing plate 8 close to the fan casing 1, a protrusion 10 is fixedly connected to the surface of the plug-in plate 9, and a plug-in groove 11 is clamped on the surface of the plug-in plate 9.

[0024] By installing the first sealing gasket 3 on the first connecting plate 4 and aligning the first mounting holes 5 of the two, installing the first bolt 6 in the first mounting hole 5, and installing the first connecting plate 4 in the plug-in slot 11 of the fan housing through the plug-in plate 9, pressing the first connecting plate 4 inward can make the plug-in plate 9 snap into the plug-in slot 11, and the stability of the connection is increased by the protrusion 10, while the first bolt 6 and the first mounting hole 5 on the fan housing 1 are quickly positioned, and the first bolt 6 is screwed into the first nut 7 using a tool, thereby fixing the position of the first connecting plate 4 and the fan housing 1, and the firmness of the connection is ensured by the connection between the plug-in plate 9 and the plug-in slot 11, and the sealing effect of the connection is ensured by the first sealing gasket 3.

[0025] There are multiple first mounting holes 5 , the number of first bolts 6 corresponds to the number of first mounting holes 5 , the first nuts 7 are located inside the fan housing 1 , there are four reinforcing plates 8 , and the plug-in slot 11 is fixedly connected to the fan housing 1 .

[0026] A protective plate 12 is fixedly connected to the inner wall of the fan housing 1 , and a mounting plate 13 is fixedly connected to the top of the fan housing 1 . A second mounting hole 14 is formed in the middle of the mounting plate 13 .

[0027] A second sealing gasket 15 is provided on the side of the fan housing 1 away from the first sealing gasket 3, and a second connecting plate 16 is provided on the side of the second sealing gasket 15 away from the fan housing 1. The side of the second connecting plate 16 away from the second sealing gasket 15 is fixedly connected to a connecting tube 17, and a second bolt 18 is slidably connected to the middle part of the second connecting plate 16. The surface of the second bolt 18 is threadedly connected to the first tooth plate 19, and the surface of the second bolt 18 is threadedly connected to the second tooth plate 20.

[0028] By installing the second bolt 18 on the second connecting plate 16, and installing the second sealing gasket 15 on the second connecting plate 16 through the second bolt 18, the second connecting plate 16 and the second sealing gasket 15 are installed on the back of the fan housing 1 through the second bolt 18, and the first tooth plate 19 and the second tooth plate 20 are installed in sequence on the surface of the second bolt 18. After the position is fixed, the rack on the second tooth plate 20 is stuck in the tooth groove of the first tooth plate 19 and conflicts with each other, thereby preventing the centrifugal fan from being displaced by the second bolt 18 during operation and causing it to fall off.

[0029] The second bolt 18 penetrates the fan housing 1 and extends into the interior thereof. The first notch plate 19 and the second notch plate 20 are both located inside the fan housing 1 , and the second notch plate 20 is clamped inside the first notch plate 19 .

[0030] An air inlet tube 21 is provided on the side of the first connecting plate 4 away from the first sealing gasket 3 , a third bolt 22 is provided in the middle of the air inlet tube 21 , a spring washer 23 is movably sleeved on the surface of the third bolt 22 , and a second nut 24 is threadedly connected to the surface of the third bolt 22 .

[0031] By installing the connecting tube 17 on the first connecting plate 4, fixing its position with the third bolt 22 and the second nut 24, and adding a spring gasket 23 between the two, the vibration generated when the centrifugal fan is working can be offset to a certain extent. At the same time, the connecting tube 17 adopts a conical structure, which can increase the air intake when the centrifugal fan is working.

[0032] The air inlet tube 21 adopts a conical structure. The third bolt 22 passes through the first connecting plate 4 and extends into the interior thereof. The spring washer 23 is in contact with the first connecting plate 4 .

[0033] The utility model provides a reinforced centrifugal fan volute structure, the specific working principle is as follows:

[0034] When in use, install the first sealing gasket 3 on the first connecting plate 4, and align the first mounting holes 5 of the two, install the first bolt 6 in the first mounting hole 5, and install the first connecting plate 4 in the plug-in slot 11 of the fan housing through the plug-in plate 9. Press the first connecting plate 4 inward to make the plug-in plate 9 snap into the plug-in slot 11, and increase the stability of the connection through the protrusion 10. At the same time, the first bolt 6 and the first mounting hole 5 on the fan housing 1 are quickly positioned. Use a tool to screw the first bolt 6 into the first nut 7 to fix the position of the first connecting plate 4 and the fan housing 1. Install the connecting tube 17 on the first connecting plate 4, and use the third bolt 22 and the second bolt The nut 24 fixes its position, and a spring washer 23 is added between the two to offset the vibration generated when the centrifugal fan is working. The second bolt 18 is installed on the second connecting plate 16, and the second sealing gasket 15 is installed on the second connecting plate 16 through the second bolt 18. The second connecting plate 16 and the second sealing gasket 15 are installed on the back of the fan housing 1 through the second bolt 18. The first tooth plate 19 and the second tooth plate 20 are installed on the surface of the second bolt 18 in sequence. After the position is fixed, the rack on the second tooth plate 20 is stuck in the tooth groove of the first tooth plate 19 and conflicts with each other, thereby preventing the centrifugal fan from displacing with the second bolt 18 when working.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood 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 present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforced centrifugal fan volute structure, comprising a fan housing (1), characterized in that: The front of the fan housing (1) is provided with an air inlet (2), the front of the fan housing (1) is provided with a first sealing gasket (3), a first connecting plate (4) is provided on the side of the first sealing gasket (3) away from the fan housing (1), a first mounting hole (5) is provided in the middle of the first connecting plate (4) and the fan housing (1), a first bolt (6) is slidably connected inside the first mounting hole (5), a first nut (7) is threadedly connected on the surface of the first bolt (6), a reinforcing plate (8) is fixedly connected on the side of the first connecting plate (4) away from the first sealing gasket (3), a plug-in plate (9) is fixedly connected on the side of the reinforcing plate (8) close to the fan housing (1), a protrusion (10) is fixedly connected on the surface of the plug-in plate (9), and a plug-in slot (11) is clamped on the surface of the plug-in plate (9).

2. The reinforced centrifugal fan volute structure according to claim 1, characterized in that: The number of the first mounting holes (5) is multiple, the number of the first bolts (6) corresponds to the number of the first mounting holes (5), the first nuts (7) are located inside the fan housing (1), the number of the reinforcing plates (8) is four, and the plug-in slot (11) is fixedly connected to the fan housing (1).

3. The reinforced centrifugal fan volute structure according to claim 1, characterized in that: A protective plate (12) is fixedly connected to the inner wall of the fan housing (1), a mounting plate (13) is fixedly connected to the top end of the fan housing (1), and a second mounting hole (14) is provided in the middle of the mounting plate (13).

4. The reinforced centrifugal fan volute structure according to claim 1, characterized in that: A second sealing gasket (15) is provided on the side of the fan housing (1) away from the first sealing gasket (3), a second connecting plate (16) is provided on the side of the second sealing gasket (15) away from the fan housing (1), a connecting tube (17) is fixedly connected to the side of the second connecting plate (16) away from the second sealing gasket (15), a second bolt (18) is slidably connected to the middle part of the second connecting plate (16), a surface of the second bolt (18) is threadedly connected to the first tooth plate (19), and a surface of the second bolt (18) is threadedly connected to the second tooth plate (20).

5. The reinforced centrifugal fan volute structure according to claim 4, characterized in that: The second bolt (18) passes through the fan housing (1) and extends into the interior thereof; the first tooth plate (19) and the second tooth plate (20) are both located inside the fan housing (1); and the second tooth plate (20) is clamped inside the first tooth plate (19).

6. The reinforced centrifugal fan volute structure according to claim 1, characterized in that: An air inlet tube (21) is provided on a side of the first connecting plate (4) away from the first sealing gasket (3), a third bolt (22) is provided in the middle of the air inlet tube (21), a spring washer (23) is movably sleeved on the surface of the third bolt (22), and a second nut (24) is threadedly connected to the surface of the third bolt (22).

7. The reinforced centrifugal fan volute structure according to claim 6, characterized in that: The air inlet cylinder (21) adopts a conical structure, the third bolt (22) penetrates the first connecting plate (4) and extends into the interior thereof, and the spring washer (23) is in contact with the first connecting plate (4).

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