Air guide device of multi-blade centrifugal fan

Abstract

The utility model belongs to the technical field of centrifugal fans, and particularly relates to a multi-blade centrifugal fan air guide device which comprises a centrifugal fan and an air outlet pipe, the air outlet pipe is fixedly connected with an air guide cover, an installation frame is installed at the end, away from the air outlet pipe, of the air guide cover, a plurality of grid plates are arranged on the inner side of the installation frame, and the grid plates are fixedly connected with the air outlet pipe. Rotating shafts are fixed to the two ends of the grid plate, the rotating shafts penetrate through the inner wall of the mounting frame and are rotationally connected with the mounting frame, and gears are fixed to the end faces of the ends, located in the mounting frame, of the rotating shafts; the mounting frame is fixed on the wind scooper in advance through the positioning clamping shaft, the mounting frame can swing around the positioning clamping shaft, the two faces of the mounting frame and the inner wall of the wind scooper can be cleaned and maintained conveniently, when the centrifugal fan is turned off in daily use, the grid plates can be adjusted through the adjusting knob to form a plane, and therefore the wind scooper is in a closed state, and the wind scooper is prevented from being damaged. And small animals are prevented from entering the wind scooper and the centrifugal fan, so that the air duct is protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifugal fan technical field, concretely relates to a kind of multi-blade centrifugal fan air guide device. BACKGROUND

[0002] Centrifugal fan is a kind of fluid machinery, which relies on input mechanical energy to improve gas pressure and discharge gas. Its working principle is to accelerate gas by high-speed rotating impeller, so as to treat gas as incompressible fluid and discharge it. Centrifugal fan is widely used in chemical industry, mining, power and other industries. Centrifugal fan is usually used with other equipment, such as dust collector, adsorption tower, etc., to achieve the purpose of purifying waste gas.

[0003] According to the search, the publication (announcement) number: CN216842322U discloses a kind of centrifugal fan's air guide device, and the technology discloses "including device main body, the device main body middle end is equipped with centrifugal fan, the centrifugal fan top end is equipped with fixed plate and motor, the centrifugal fan front wall is equipped with pull groove and handle, the centrifugal fan left side is equipped with fixed frame, the fixed frame inboard is equipped with mounting block and slot, the slot inboard upper middle end and lower middle end are equipped with connecting block and spring, the spring bottom end is equipped with block, the mounting block inboard is equipped with air guide fan and connecting rib" and other technical schemes;It has the advantages of "the device has the advantages of convenient disassembly and installation of air guide device, filtering and guiding air in the process of removing other impurities in air" and other technical effects;

[0004] The air guide device can guide and change the direction of the wind power of the centrifugal fan, but dust is easy to accumulate after long-term use. The existing air guide device and centrifugal fan are not convenient to install and disassemble, which is not conducive to the cleaning and maintenance of the air guide device.

[0005] To solve the above problems, a kind of multi-blade centrifugal fan air guide device is provided in the present application. UTILITY MODEL CONTENTS

[0006] To solve the problems raised in the above background technology, the utility model provides a kind of multi-blade centrifugal fan air guide device, which has the characteristics of convenient installation and disassembly, and can close and protect the ventilation opening.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a kind of multi-blade centrifugal fan air guide device, including centrifugal fan and air outlet pipe, the air outlet pipe is fixedly connected with air guide cover, the end of the air guide cover away from the air outlet pipe is installed with mounting frame, the inboard of the mounting frame is provided with a plurality of louvers, the both ends of the louver are fixed with rotating shaft, the rotating shaft penetrates the inner wall of the mounting frame and is rotatably connected with the mounting frame, the end face of the rotating shaft located in the mounting frame is fixed with gear, the gear is provided with rack slidingly connected in the inboard of the mounting frame, the rack and all the gears are engaged.

[0008] As a preferred wind guide device for a multi-blade centrifugal fan of the present invention, a screw is fixed at one end of the rack, a limiting frame is slidably connected to the screw, the limiting frame is fixed on the inner side of the mounting frame, an adjustment knob threadedly connected to the screw is provided between the limiting frames, and the outer wall of the adjustment knob passes through the mounting frame and extends to the outside of the mounting frame.

[0009] As a preferred embodiment of the air guide device for a multi-blade centrifugal fan of the present invention, the top and bottom sides of the grid plate are arc-shaped surfaces.

[0010] As a preferred wind guide device for a multi-blade centrifugal fan of the present invention, a positioning card shaft is fixed to the top of the mounting frame, a card slot matching the positioning card shaft is opened at the position of the wind guide cover corresponding to the positioning card shaft, a fixing seat two is fixed on both sides of the mounting frame away from one end of the positioning card shaft, a fixing seat one is fixed to the wind guide cover corresponding to the fixing seat two, and the fixing seat one and the fixing seat two are fixed by bolts.

[0011] As a preferred embodiment of the air guide device of a multi-blade centrifugal fan of the present invention, the air guide cover is a hollow frustum structure.

[0012] As a preferred embodiment of the utility model of the air guide device for a multi-blade centrifugal fan, a sealing gasket is adhered to one side where the mounting frame and the air guide cover are in contact.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The positioning card shaft of the utility model enables the installation frame to be pre-fixed on the air guide cover, and the installation frame can swing around the positioning card shaft, which is convenient for cleaning and maintaining both sides of the installation frame, as well as cleaning and maintaining the inner wall of the air guide cover. The installation frame can also be removed and replaced as a whole. When the grid plate in the installation frame is in use, the angle of the grid plate can be adjusted by turning the adjustment knob. When the centrifugal fan is turned off in daily use, the grid plate can be adjusted to form a plane by adjusting the knob, so that the air guide cover is in a closed state, preventing small animals from entering the air guide cover and the centrifugal fan, thereby protecting the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Fig. 1 It is a structural diagram of the utility model;

[0017] Fig. 2 This is a front structural diagram of the present invention;

[0018] Fig. 3 is a structural schematic view of the mounting frame in the utility model;

[0019] Fig. 4 is a structural schematic view of the mounting frame in the utility model;

[0020] In the drawing: 1, centrifugal fan; 2, air outlet pipe; 3, air guide cover; 4, mounting frame; 5, positioning shaft; 6, fixed seat one; 7, fixed seat two; 8, grid plate; 9, rotating shaft; 10, gear; 11, rack; 12, screw rod; 13, limiting frame; 14, adjusting knob; 15, sealing gasket. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Embodiment 1

[0023] As Figs. 1 to 4 indicated;

[0024] A kind of multi-vane centrifugal fan air guide device, including centrifugal fan 1 and air outlet pipe 2, air outlet pipe 2 is fixedly connected with air guide cover 3, air guide cover 3 is installed with mounting frame 4 away from the end of air outlet pipe 2, the inside of mounting frame 4 is provided with several grid plates 8, the both ends of grid plate 8 are fixed with rotating shaft 9, rotating shaft 9 penetrates the inner wall of mounting frame 4 and is connected with mounting frame 4 rotationally, the end face of rotating shaft 9 in mounting frame 4 is fixed with gear 10, gear 10 is provided with rack 11 slidingly connected in the inside of mounting frame 4, rack 11 and all gear 10 are engaged.

[0025] Further more:

[0026] In an alternative embodiment, one end of rack 11 is fixed with screw rod 12, limiting frame 13 is slidingly connected on screw rod 12, limiting frame 13 is fixed in the inside of mounting frame 4, limiting frame 13 is provided with adjusting knob 14 threadedly connected on screw rod 12, the outside wall of adjusting knob 14 penetrates mounting frame 4 and extends to the outside of mounting frame 4.

[0027] In the embodiment, when the utility model is used, the centrifugal fan 1 drives wind to the air deflector 3, and the air is blown out through the installation frame 4. The operator rotates the adjusting knob 14, the adjusting knob 14 makes the screw rod 12 slide along the axial direction, thereby driving the rack 11 to slide. Since the gear 10 and the rack 11 are engaged, the movement of the rack 11 drives the gear 10 to rotate the rotating shaft 9, and all the rotating shafts 9 rotate synchronously, thereby enabling the plurality of baffle plates 8 to be angle-adjusted, the direction of the air deflection is changed, and when the centrifugal fan 1 stops working, the plurality of baffle plates 8 are in the stroke plane, the installation frame 4 is closed, and the small animals or sundries outside are prevented from entering the air deflector 3 or the air outlet pipe 2, thereby protecting the air duct and the centrifugal fan 1.

[0028] It should be noted that the centrifugal fan 1 is a multi-blade centrifugal fan and is electrically connected with the external power supply.

[0029] Further, the plurality of baffle plates 8 are arranged in the installation frame 4.

[0030] In an optional embodiment, the top and bottom of the baffle plate 8 are arc-shaped surfaces.

[0031] In the embodiment, the arc-shaped surface has small wind resistance when the baffle plate 8 guides the air, and the air deflection is facilitated.

[0032] Further, the plurality of baffle plates 8 are arranged in the installation frame 4.

[0033] In an optional embodiment, the top end of the installation frame 4 is fixed with a positioning clamping shaft 5, the air deflector 3 is provided with a clamping groove matched with the positioning clamping shaft 5 at the position corresponding to the positioning clamping shaft 5, the two sides of the end of the installation frame 4 away from the positioning clamping shaft 5 are fixed with a second fixing seat 7, the air deflector 3 is fixed with a first fixing seat 6 at the position corresponding to the second fixing seat 7, and the first fixing seat 6 and the second fixing seat 7 are fixed by bolts.

[0034] In the embodiment, when the utility model is used, the centrifugal fan 1 drives wind to the air deflector 3, and the air is blown out through the installation frame 4. The operator rotates the adjusting knob 14, the adjusting knob 14 makes the screw rod 12 slide along the axial direction, thereby driving the rack 11 to slide. Since the gear 10 and the rack 11 are engaged, the movement of the rack 11 drives the gear 10 to rotate the rotating shaft 9, and all the rotating shafts 9 rotate synchronously, thereby enabling the plurality of baffle plates 8 to be angle-adjusted, the direction of the air deflection is changed, and when the centrifugal fan 1 stops working, the plurality of baffle plates 8 are in the stroke plane, the installation frame 4 is closed, and the small animals or sundries outside are prevented from entering the air deflector 3 or the air outlet pipe 2, thereby protecting the air duct and the centrifugal fan 1.

[0035] Further, the plurality of baffle plates 8 are arranged in the installation frame 4.

[0036] In an optional embodiment, the air deflector 3 is in a hollow conical frustum structure.

[0037] In this embodiment: through this design, the wind force generated by the centrifugal fan 1 can be transported to a larger area after passing through the air guide cover 3, while reducing the wind pressure, so as to provide uniform wind force.

[0038] Further, the air guide cover 3 is connected with the mounting frame 4.

[0039] In an optional embodiment, a sealing gasket 15 is attached to the side of the mounting frame 4 and the air guide cover 3.

[0040] In this embodiment: through this design, the sealing gasket 15 makes the air guide cover 3 and the mounting frame 4 connected tightly, preventing wind loss from the connection.

[0041] The working principle and use process of the utility model: when the utility model is used, the centrifugal fan 1 is started to drive the wind to the air guide cover 3, and is blown out through the mounting frame 4, the operator rotates the adjusting knob 14, the adjusting knob 14 makes the screw rod 12 slide along the axial direction, thereby driving the rack 11 to slide, because the gear 10 and the rack 11 are engaged, the rack 11 moves to make the gear 10 drive the rotating shaft 9 to rotate, and all the rotating shafts 9 rotate synchronously, thereby the plurality of baffle plates 8 can be angle-adjusted, the direction of the air guide is changed, when the baffle plate 8 guides the air, the arc surface has small air resistance, which is beneficial to air guide, when the centrifugal fan 1 stops working, through this mode, the stroke plane of the plurality of baffle plates 8 is formed, the mounting frame 4 is closed, and external small animals or sundries are prevented from entering the air guide cover 3 or the air outlet pipe 2, thereby the air duct and the centrifugal fan 1 are protected.

[0042] When the mounting frame 4 is installed, the positioning clamping shaft 5 is clamped into the clamping groove at the top of the air guide cover 3, the pre-fixing of the mounting frame 4 is realized, at this time, the mounting frame 4 can be flipped around the positioning clamping shaft 5 until the fixed seat two 7 and the fixed seat one 6 coincide, the fixed seat two 7 and the fixed seat one 6 are fixed together through the bolt, the mounting frame 4 is fixed firmly and stably, when the mounting frame 4 and the baffle plate 8 need to be cleaned, the bolt on the fixed seat one 6 and the fixed seat two 7 is disassembled, because the mounting frame 4 can be flipped, the mounting frame 4 is lifted up, and the two sides of the baffle plate 8 can be cleaned in place, and the positioning clamping shaft 5 bears part of the weight of the mounting frame 4 during cleaning, which is convenient for cleaning operation, and the mounting frame 4 is lifted up, which is convenient for cleaning the inside of the air guide cover 3.

[0043] Finally, it should be pointed out that: the above only for the preferred embodiment of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A multi-blade centrifugal fan air guide device, characterized by: The invention comprises a centrifugal fan (1) and an air outlet pipe (2), wherein the air outlet pipe (2) is fixedly connected to an air guide cover (3), and an installation frame (4) is installed at one end of the air guide cover (3) away from the air outlet pipe (2), and a plurality of grid plates (8) are provided on the inner side of the installation frame (4), and a rotating shaft (9) is fixed at both ends of the grid plates (8), and the rotating shaft (9) passes through the inner wall of the installation frame (4) and is rotatably connected to the installation frame (4), and a gear (10) is fixed to the end face of one end of the rotating shaft (9) located in the installation frame (4), and a rack (11) is provided on one side of the gear (10) and is slidably connected to the inner side of the installation frame (4), and the rack (11) and all the gears (10) are meshed.

2. The air guide device for a multi-blade centrifugal fan according to claim 1, characterized in that: A screw rod (12) is fixed to one end of the rack (11), a limiting frame (13) is slidably connected to the screw rod (12), the limiting frame (13) is fixed to the inner side of the installation frame (4), an adjusting knob (14) is provided between the limiting frames (13) and is threadedly connected to the screw rod (12), and an outer side wall of the adjusting knob (14) passes through the installation frame (4) and extends to the outside of the installation frame (4).

3. The air guide device for a multi-blade centrifugal fan according to claim 1, wherein: The top and bottom sides of the grid plate (8) are arc-shaped surfaces.

4. The air guide device for a multi-blade centrifugal fan according to claim 1, characterized in that: A positioning card shaft (5) is fixed to the top of the installation frame (4), and a card slot matching the positioning card shaft (5) is opened on the air guide cover (3) at a position corresponding to the positioning card shaft (5). A second fixing seat (7) is fixed on both sides of one end of the installation frame (4) away from the positioning card shaft (5), and a first fixing seat (6) is fixed on the air guide cover (3) at a position corresponding to the second fixing seat (7). The first fixing seat (6) and the second fixing seat (7) are fixed by bolts.

5. The air guide device for a multi-blade centrifugal fan according to claim 1, characterized in that: The air guide cover (3) is a hollow frustum structure.

6. The air guide device for a multi-blade centrifugal fan according to claim 1, characterized in that: A sealing gasket (15) is adhered to the side where the mounting frame (4) and the air guide cover (3) are in contact.

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