Environment-friendly centrifugal fan special for dust removal

Abstract

The utility model relates to a special environment-friendly dust removal centrifugal fan which comprises a centrifugal volute, an air outlet is formed in the upper portion of the centrifugal volute, a circular air inlet is formed in the middle of the front end face of the centrifugal volute, a circular mounting hole is formed in the middle of the rear end face of the centrifugal volute, and the rear end face of the centrifugal volute abuts against a circular rear cover plate covering the mounting hole. A plurality of screws are inserted into the outer ring of the rear cover plate and are screwed and fixed on the centrifugal volute; four groups of longitudinal L-shaped lug plates are fixedly connected to the periphery of the rear end surface of the rear cover plate; the lug plates are annularly and uniformly distributed around the central axis of the rear cover plate; a plurality of connecting holes are respectively formed in two side plates of the lug plate; a longitudinal motor is arranged on the rear side of the middle of the rear cover plate, a rotating shaft of the motor penetrates through the rear cover plate and is connected with an impeller through a key, and the impeller is inserted into the centrifugal volute. And mounting supporting legs of the motor abut against a motor mounting plate with an L-shaped longitudinal section. The centrifugal fan is simple in structure, all parts are convenient to install and connect, and the overall strength is high.

Description

Technical field:

[0001] The utility model relates to the technical field of fans, and more specifically to a centrifugal fan dedicated for environmental protection and dust removal. Background technology:

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; they are also used for ventilation and air in environmental protection treatment pipelines. At present, the volute on the centrifugal fan generally has a mounting hole for installing the impeller. The impeller enters the volute through the mounting hole. In order to cover the mounting hole, it is necessary to install a rear cover on the volute, and the impeller is connected to the motor. The motor is set on the outside of the volute and fixed to the rear cover through a number of divergent spoke brackets. During the specific installation, the motor is generally fixed to the rear cover first, and then the motor shaft passes through the rear cover, and then the impeller is installed on the motor shaft, and finally the impeller is inserted into the volute, and the rear cover is fixed to the volute by screws. However, the installation of this structure requires multiple people to lift the motor, or the motor is hoisted by hoisting, and then the rear cover can be fixed to the volute, which is inconvenient and troublesome to install. Utility model content:

[0003] The utility model aims to solve the problems in the prior art and provides a centrifugal fan for environmental dust removal. The centrifugal fan has a simple structure, convenient installation and connection of various components, and high overall strength.

[0004] A centrifugal fan for environmental dust removal comprises a centrifugal volute, an air outlet is formed on the upper part of the centrifugal volute, a circular air inlet is formed in the middle of the front end face of the centrifugal volute, a circular mounting hole is formed in the middle of the rear end face of the centrifugal volute, the rear end face of the centrifugal volute abuts against a circular rear cover plate covering the mounting hole, a plurality of screws are inserted into the outer ring of the rear cover plate, and the screws are screwed and fixed on the centrifugal volute; four groups of longitudinal and L-shaped ear plates are fixed around the rear end face of the rear cover plate, and the ear plates are evenly distributed in a ring shape around the central axis of the rear cover plate; a plurality of connection holes are respectively formed on the side plates on both sides of the ear plates;

[0005] A longitudinal motor is provided at the rear side of the middle part of the rear cover plate, the rotating shaft of the motor passes through the rear cover plate and is connected to an impeller through a key, and the impeller is inserted in the centrifugal volute; the mounting foot of the motor abuts against a motor mounting plate with an L-shaped longitudinal section, a plurality of longitudinal waist-shaped holes are formed on the motor mounting plate, a connecting bottom plate is inserted in the motor mounting plate, the connecting bottom plate is fixedly connected to the mounting foot of the motor through a second bolt assembly, and the bolts on the second bolt assembly are inserted in the waist-shaped holes of the motor mounting plate;

[0006] The motor mounting plate is composed of a horizontal rectangular connecting plate and right-angled trapezoidal side plates on both sides of the connecting plate. The front sides of the side plates are fixedly connected to the ear plates by a plurality of first bolt assemblies, and the bolts of the first bolt assemblies are respectively inserted into the connecting holes of the ear plates; oblique support rods are respectively provided on both sides of the motor, and the upper and lower ends of the oblique support rods are respectively fixedly connected to the ear plates on the upper side of the motor and the rear sides of the side plates by third bolt assemblies.

[0007] Preferably, the diameter of the mounting hole on the centrifugal volute is larger than the diameter of the impeller and smaller than the diameter of the rear cover plate, and the screws are evenly distributed in a ring shape around the central axis of the rear cover plate.

[0008] Preferably, an air guide cylinder with an arc-shaped cross-section and opposite to the impeller is plugged and fixed at the air inlet of the centrifugal volute.

[0009] Preferably, an auxiliary hole is formed on the side plate on the rear side of the motor mounting plate, the bolts on the third bolt assembly at the lower end of the oblique support rod are inserted into the auxiliary hole of the side plate, and the bolts on the third bolt assembly at the upper end of the oblique support rod are inserted into the connecting hole of the ear plate.

[0010] Preferably, the distance between adjacent ear plates on the rear cover plate is equal to the width of the motor mounting plate.

[0011] Preferably, four groups of second bolt assemblies are provided on the connecting base plate, and the bolts on the second bolt assemblies are respectively screwed and fixed on the connecting base plate.

[0012] Preferably, the length of the motor mounting plate is smaller than the vertical distance from the first bolt assembly on the upper portion of the ear plate to the lower end surface of the centrifugal volute.

[0013] The beneficial effects of the utility model are:

[0014] The centrifugal fan has a simple structure, convenient installation and connection of various components, and high overall strength. Description of the drawings:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model from the rear;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model from the side;

[0017] Figure 3 It is a side view schematic diagram of the utility model during the process of installing the motor.

[0018] In the figure: 1, centrifugal volute; 11, mounting hole; 12, air inlet; 2, rear cover; 3, screw; 4, motor; 5, impeller; 6, air guide tube; 7, ear plate; 71, connecting hole; 8, motor mounting plate; 81, connecting plate; 82, side plate; 83, auxiliary hole; 9, first bolt assembly; 10, connecting bottom plate; 20, second bolt assembly; 30, oblique support rod; 40, third bolt assembly. Specific implementation method:

[0019] Example: See Figure 1 , 2 As shown, a centrifugal fan for environmental dust removal includes a centrifugal volute 1, an air outlet is formed on the upper part of the centrifugal volute 1, a circular air inlet 12 is formed in the middle of the front end face of the centrifugal volute 1, a circular mounting hole 11 is formed in the middle of the rear end face of the centrifugal volute 1, the rear end face of the centrifugal volute 1 abuts against a circular rear cover plate 2 covering the mounting hole 11, a plurality of screws 3 are inserted into the outer ring of the rear cover plate 2, and the screws 3 are screwed and fixed on the centrifugal volute 1; four groups of longitudinal and L-shaped ear plates 7 are fixedly connected around the rear end face of the rear cover plate 2, and the ear plates 7 are evenly distributed in a ring shape around the central axis of the rear cover plate 2; a plurality of connecting holes 71 are respectively formed on the side plates on both sides of the ear plate 7;

[0020] A longitudinal motor 4 is provided on the rear side of the middle of the rear cover plate 2, and the rotating shaft of the motor 4 passes through the rear cover plate 2 and is connected to an impeller 5 by a key, and the impeller 5 is inserted in the centrifugal volute 1; the mounting feet of the motor 4 abut against a motor mounting plate 8 with an L-shaped longitudinal section, and a plurality of longitudinal waist-shaped holes are formed on the motor mounting plate 8, and a connecting bottom plate 10 is inserted in the motor mounting plate 8, and the connecting bottom plate 10 is fixedly connected to the mounting feet of the motor 4 by a second bolt assembly 20, and the bolts on the second bolt assembly 20 are inserted in the waist-shaped holes of the motor mounting plate 8;

[0021] The motor mounting plate 8 is composed of a horizontal rectangular connecting plate 81 and right-angled trapezoidal side plates 82 on both sides of the connecting plate 81. The front sides of the side plates 82 are fixedly connected to the ear plates 7 by a plurality of first bolt assemblies 9, and the bolts of the first bolt assemblies 9 are respectively inserted into the connecting holes 71 of the ear plates 7; oblique support rods 30 are respectively provided on both sides of the motor 4, and the upper and lower ends of the oblique support rods 30 are respectively fixedly connected to the ear plates 7 on the upper side of the motor 4 and the rear sides of the side plates 82 by third bolt assemblies 40.

[0022] The diameter of the mounting hole 11 on the centrifugal volute 1 is larger than the diameter of the impeller 5 and smaller than the diameter of the rear cover plate 2 , and the screws 3 are evenly distributed in a ring shape around the central axis of the rear cover plate 2 .

[0023] An air guide cylinder 6 having an arc-shaped cross section and facing the impeller 5 is inserted and fixed at the air inlet 12 of the centrifugal volute 1 .

[0024] An auxiliary hole 83 is formed on the side plate 82 on the rear side of the motor mounting plate 8, and the bolts on the third bolt assembly 40 at the lower end of the oblique support rod 30 are inserted into the auxiliary hole 83 of the side plate 82, and the bolts on the third bolt assembly 40 at the upper end of the oblique support rod 30 are inserted into the connecting hole 71 of the ear plate 7.

[0025] The distance between adjacent ear plates 7 on the rear cover plate 2 is equal to the width of the motor mounting plate 8, that is, the side plates 82 on both sides of the motor mounting plate 8 are respectively against the ear plates 7, which is convenient for positioning the position of the motor mounting plate 8; and the motor mounting plate 8 can be inserted between any two adjacent ear plates 7 for connection (just rotate and adjust the position of the motor mounting plate 8 at the end), which is convenient for installation.

[0026] There are four groups of second bolt assemblies 20 on the connecting base plate 10. The bolts on the second bolt assemblies 20 are respectively screwed and fixed on the connecting base plate 10. The connecting base plate 10 can be used as a carrier for the bolts on the four groups of second bolt assemblies 20. When installing the motor 4, the bolts only need to be tightened by passing through the mounting feet of the motor 4.

[0027] The length of the motor mounting plate 8 is smaller than the vertical distance from the first bolt assembly 9 on the upper part of the ear plate 7 to the lower end surface of the centrifugal volute 1, so that when the motor mounting plate 8 is only connected to one set of the first bolt assembly 9 and turned over by gravity, it will not contact the ground. Figure 3 and the front and rear ends of the side panels 82 are formed with rounded corners.

[0028] Working principle: The utility model is a centrifugal fan for environmental dust removal. The main technical point of the centrifugal fan is the installation and connection structure of the motor 4 and the centrifugal volute 1. The rear cover plate 2 with four sets of ear plates 7 is used as the connection carrier between the motor 4 and the centrifugal volute 1.

[0029] During installation, firstly put the impeller 4 into the centrifugal volute 1 through the installation hole 1, and then install and fix the rear cover plate 2 on the centrifugal volute 1;

[0030] Then, the motor mounting plate 8 is inserted between the ear plates 7 and connected with a set of first bolt assemblies 9, but not tightened; then, the motor 4 is moved to the motor mounting plate 8, the motor 4 is placed upright on the ground and the second bolt assembly 20 is used to fasten the motor mounting plate 8, then the first bolt assembly 9 is used as a fulcrum to lift the motor 4 to make the motor 4 horizontal. Compared with directly lifting the motor to the horizontally arranged motor mounting plate 8, it is more labor-saving to rotate and flip it up with the first bolt assembly 9 as a fulcrum; then the first bolt assembly 9 is installed to achieve that the motor mounting plate 8 is completely fixed to the ear plate 7;

[0031] Then loosen the nut on the second bolt assembly 20, adjust the position of the motor 4, install the impeller 5 on the rotating shaft of the motor 4 through the air inlet 12 of the centrifugal volute 1, and finally tighten the nut on the second bolt assembly 20 to position the motor 4;

[0032] In order to strengthen the connection strength between the motor 4 and the rear cover plate 2, an inclined support rod 30 is added; and there are four groups of ear plates 7 on the rear cover plate 2, which can effectively improve the strength of the rear cover plate 2 and facilitate the bending and deformation of the rear cover plate 2.

[0033] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A centrifugal fan for environmental dust removal, comprising a centrifugal volute (1), an air outlet formed on the upper part of the centrifugal volute (1), a circular air inlet (12) formed in the middle of the front end surface of the centrifugal volute (1), a circular mounting hole (11) formed in the middle of the rear end surface of the centrifugal volute (1), the rear end surface of the centrifugal volute (1) abuts against a circular rear cover (2) covering the mounting hole (11), a plurality of screws (3) are inserted into the outer ring of the rear cover (2), and the screws (3) are screwed and fixed on the centrifugal volute (1); characterized in that: Four groups of longitudinal L-shaped ear plates (7) are fixedly connected to the periphery of the rear end surface of the rear cover plate (2), and the ear plates (7) are evenly distributed in a ring shape around the central axis of the rear cover plate (2); and a plurality of connection holes (71) are respectively formed on the side plates on both sides of the ear plates (7); A longitudinal motor (4) is provided on the rear side of the middle part of the rear cover plate (2), the rotating shaft of the motor (4) passes through the rear cover plate (2) and is connected to an impeller (5) via a key, and the impeller (5) is inserted into the centrifugal volute (1); the mounting feet of the motor (4) are against a motor mounting plate (8) having an L-shaped longitudinal section, a plurality of longitudinal waist-shaped holes are formed on the motor mounting plate (8), a connecting base plate (10) is inserted into the motor mounting plate (8), and the connecting base plate (10) is fixedly connected to the mounting feet of the motor (4) via a second bolt assembly (20), and the bolts on the second bolt assembly (20) are inserted into the waist-shaped holes of the motor mounting plate (8); The motor mounting plate (8) is composed of a horizontal rectangular connecting plate (81) and right-angled trapezoidal side plates (82) on both sides of the connecting plate (81); the front sides of the side plates (82) are respectively fixedly connected to the ear plates (7) through a plurality of first bolt assemblies (9); the bolts of the first bolt assemblies (9) are respectively inserted into the connecting holes (71) of the ear plates (7); the motor (4) is respectively provided with oblique support rods (30); the upper and lower ends of the oblique support rods (30) are respectively fixedly connected to the ear plates (7) on the upper side of the motor (4) and the rear sides of the side plates (82) through third bolt assemblies (40).

2. The centrifugal fan for environmental dust removal according to claim 1 is characterized in that: The diameter of the mounting hole (11) on the centrifugal volute (1) is larger than the diameter of the impeller (5) and smaller than the diameter of the rear cover (2), and the screws (3) are evenly distributed in a ring shape around the central axis of the rear cover (2).

3. The centrifugal fan for environmental dust removal according to claim 2 is characterized in that: An air guide cylinder (6) having an arc-shaped cross section and facing the impeller (5) is plugged and fixed at the air inlet (12) of the centrifugal volute (1).

4. The centrifugal fan for environmental dust removal according to claim 1 is characterized in that: An auxiliary hole (83) is formed on the side plate (82) on the rear side of the motor mounting plate (8), the bolts on the third bolt assembly (40) at the lower end of the oblique support rod (30) are inserted into the auxiliary hole (83) of the side plate (82), and the bolts on the third bolt assembly (40) at the upper end of the oblique support rod (30) are inserted into the connecting hole (71) of the ear plate (7).

5. The centrifugal fan for environmental dust removal according to claim 1 is characterized in that: The distance between adjacent ear plates (7) on the rear cover plate (2) is equal to the width of the motor mounting plate (8).

6. The centrifugal fan for environmental dust removal according to claim 1 is characterized in that: The second bolt assemblies (20) on the connecting bottom plate (10) are provided with four groups, and the bolts on the second bolt assemblies (20) are respectively screwed and fixed on the connecting bottom plate (10).

7. The centrifugal fan for environmental dust removal according to claim 1 is characterized in that: The length of the motor mounting plate (8) is smaller than the vertical distance from the first bolt assembly (9) on the upper part of the ear plate (7) to the lower end surface of the centrifugal volute (1).

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