Axial flow fan

Abstract

The utility model discloses an axial flow fan, relates to the technical field of fans, and adopts the technical scheme that the axial flow fan comprises a fan body, the fan body comprises an air inlet flange, a noise reduction device is arranged on the air inlet flange, the noise reduction device comprises a barrel, and a sound absorption cotton block is arranged in the barrel. A connecting flange used for being attached to the air inlet flange is arranged on the barrel, and the air inlet flange is detachably fixed to the connecting flange through a connecting structure. According to the axial flow fan, the sound absorption cotton block is arranged, noise can be absorbed, the good sound absorption and noise reduction function is achieved, and the adverse effect on the production environment caused by too large noise is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, concretely is a kind of axial fan. BACKGROUND

[0002] Fan is relied on the mechanical energy of input, improves gas pressure and sends gas, it is a kind of driven fluid machinery.

[0003] Axial fan, it is gas parallel to the axial flow fan of fan, mainly by impeller, casing, motor and other components are formed, when impeller rotates, gas is axially entered impeller from air inlet, is pushed by the blade on impeller and makes the energy of gas increase, then flows into guide vane, guide vane makes deflected airflow become axial flow, simultaneously gas is guided into diffuser pipe, further converts gas kinetic energy into pressure energy, finally is introduced into working pipeline.

[0004] At present, the existing axial fan in use process, due to the high-speed rotation of impeller, will generate friction with air, causes airflow shear and pressure fluctuation, to generate larger noise, and the higher the speed of impeller, the more obvious noise generated, thereby can cause adverse effects to production environment. INNOVATION CONTENT

[0005] The utility model discloses a kind of axial fans to solve the above-mentioned problems.

[0006] The utility model discloses the above-mentioned purposes are achieved by the following technical solutions, a kind of axial fan, including fan body, the fan body includes air inlet flange, the air inlet flange is provided with noise reduction device, the noise reduction device includes cylinder, the cylinder is internally provided with sound-absorbing cotton block, the cylinder is provided with the connecting flange for being attached with the air inlet flange, the air inlet flange is detachably fixed on connecting flange by connecting structure.

[0007] As a further setting of the utility model, the connecting structure includes sliding pin fixedly connected on connecting flange, the air inlet flange is provided with the slot for sliding pin and arc slot being clamped, the slot and arc slot are perpendicular to each other.

[0008] As a further setting of the utility model, the sliding pin includes connecting section, rotating sleeve is rotatably connected on the connecting section.

[0009] As a further setting of the utility model, the connecting section is connected with threaded section, threaded sleeve is threadedly connected on the threaded section, the air inlet flange is provided with the embedded slot for threaded sleeve embedding.

[0010] As a further setting of the utility model, a plurality of anti-skid grooves are formed in the sidewall of threaded sleeve.

[0011] As a further setting of the utility model, the sound absorption cotton block is detachably installed inside the cylinder.

[0012] As a further setting of the utility model, the inner circumferential wall of the cylinder is provided with a plurality of clamping strips, and the outer circumferential wall of the sound absorption cotton is provided with a plurality of clamping grooves for clamping the clamping strips.

[0013] As a further setting of the utility model, the cylinder is made of stainless steel material.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] Before use, the air inlet flange can be aligned and attached with the connecting flange, then the air inlet flange is fixed on the connecting flange through the connecting structure, so that the noise reduction device is fixedly installed on the fan body, when the fan is used, airflow enters the fan body through the cylinder, since the sound absorption cotton block is arranged inside the cylinder and has a porous structure, the sound absorption cotton block can absorb noise when the airflow flows through the inside of the cover, thereby achieving good sound absorption and noise reduction functions, avoiding that excessive noise causes adverse effects on the production environment, and when the fan is finished working and needs to be carried, the noise reduction device can be removed, avoiding that the noise reduction device hinders the carrying of the fan, so that the fan is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

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

[0017] Figure 2 It is a structure schematic of the utility model Figure 2 ;

[0018] Figure 3 It is Figure 2 an enlarged structure schematic of A in the utility model;

[0019] Figure 4 It is a structure schematic of the fan body and the air inlet flange in the utility model;

[0020] Figure 5 It is a structure schematic of the noise reduction device in the utility model;

[0021] Figure 6 It is Figure 5 an enlarged structure schematic of B in the utility model.

[0022] Reference signs: 1, fan body; 2, air inlet flange; 3, cylinder; 4, sound absorption cotton block; 5, connecting flange; 6, insertion groove; 7, arc-shaped groove; 8, connecting section; 9, rotating sleeve; 10, threaded section; 11, threaded sleeve; 12, embedding groove; 13, anti-skid groove; 14, clamping strip. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection 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 the other embodiments obtained by the ordinary skilled in the art without any creative work belong to the scope of protection of the utility model.

[0024] Please refer to Figures 1-3 As shown in the figure, an axial flow fan, comprising a fan body 1, the fan body 1 includes an air inlet flange 2, the air inlet flange 2 is provided with a noise reduction device, the noise reduction device comprises a cylinder 3, and the cylinder 3 is made of stainless steel material, the strength and hardness are higher, and it is not easy to rust, so that the cylinder 3 has better durability, the sound absorbing cotton block 4 is arranged in the cylinder 3, and the connecting flange 5 for being attached with the air inlet flange 2 is arranged on the cylinder 3, the air inlet flange 2 is detachably fixed on the connecting flange 5 through the connecting structure, then the air inlet flange 2 can be aligned and attached with the connecting flange 5 before the fan is used, then the air inlet flange 2 is fixed on the connecting flange 5 through the connecting structure, so as to fix and install the noise reduction device on the fan body 1, when the fan is used, the airflow will enter the fan body 1 through the cylinder 3, since the sound absorbing cotton block 4 is arranged in the cylinder 3, the sound absorbing cotton block 4 is a porous structure, so when the airflow flows through the inside of the shell, the sound absorbing cotton block 4 can absorb noise, and has a good sound absorption and noise reduction function, avoiding that the noise is too large to cause adverse effects on the production environment, and when the fan is finished working and needs to be carried, the noise reduction device can be removed, avoiding that the existence of the noise reduction device hinders the carrying of the fan, so that the use of the fan is more convenient.

[0025] Please refer to Figures 1-6As shown, the connecting structure comprises a sliding pin fixedly connected to the connecting flange 5, a slot 6 and an arc-shaped groove 7 are formed on the air inlet flange 2 for the sliding pin to be clamped, and the slot 6 and the arc-shaped groove 7 are perpendicular to each other and communicate with each other. Therefore, before the noise reduction device is fixedly installed on the fan body 1, the air inlet flange 2 can be aligned and attached to the connecting flange 5, so that the sliding pin is clamped into the slot 6 and slides to the position where the slot 6 and the arc-shaped groove 7 communicate, and then the cylinder 3 is rotated, so that the connecting flange 5 is rotated, so that the sliding pin slides into the arc-shaped groove 7, and then slides to the end away from the slot 6, so as to realize the pre-positioning, so that the subsequent fixed connection is more convenient. The sliding pin comprises a connecting section 8, a rotating sleeve 9 is rotatably connected to the connecting section 8, so that when the sliding pin slides in the arc-shaped groove 7, the rotating sleeve 9 will rotate, so as to change the sliding friction between the sliding pin and the inner wall of the arc-shaped groove 7 into rolling friction, so that the sliding is more smooth and easy. The connecting section 8 is connected to a threaded section 10, and a threaded sleeve 11 is threadedly connected to the threaded section 10. A recess 12 is formed on the air inlet flange 2 for the threaded sleeve 11 to be embedded. After the sliding pin is clamped into the arc-shaped groove 7 and slides to the end away from the slot 6, the threaded sleeve 11 can be screwed, until the threaded sleeve 11 is embedded in the recess 12, so as to lock the sliding pin, and then the noise reduction device is fixedly installed on the fan body 1. When the noise reduction device needs to be disassembled, the threaded sleeve 11 is unscrewed from the recess 12, and then the sliding pin is sequentially slid out of the arc-shaped groove 7 and the slot 6, so that the disassembly of the noise reduction device is more convenient and simple. A plurality of anti-skid grooves 13 are formed on the side wall of the threaded sleeve 11, so that the friction coefficient of the side wall of the threaded sleeve 11 is greatly increased through the anti-skid grooves 13, so that the threaded sleeve 11 is not easy to slip when holding and rotating, so that the operation is more easy and labor-saving.

[0026] Please refer to Figure 1 、 Figure 5 As shown, the sound-absorbing cotton block 4 is detachably installed in the cylinder 3, so that when the sound-absorbing cotton block 4 is deformed and aged due to long-term use, it can be disassembled from the cylinder 3 and replaced, so as to always ensure the noise reduction effect of the noise reduction device. A plurality of clamping strips 14 are arranged on the inner circumferential wall of the cylinder 3, and a plurality of clamping grooves for clamping the clamping strips 14 are formed on the outer circumferential wall of the sound-absorbing cotton. When the sound-absorbing cotton block 4 is installed, the sound-absorbing cotton block 4 can be inserted into the cylinder 3, so that the clamping strips 14 are clamped into the clamping grooves. Through the limiting of the clamping grooves to the clamping strips 14, the sound-absorbing cotton block 4 can be limited, and the installation of the sound-absorbing cotton block 4 in the cylinder 3 is realized. When it needs to be disassembled and replaced, the sound-absorbing cotton block 4 can be pulled out of the cylinder 3, and the operation is more convenient and simple.

[0027] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0028] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single independent technical solution, but this does not mean that each embodiment only contains one independent technical solution. The specification is described in this way only for the sake of clarity, and a person 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 a person skilled in the art.

Claims

1. An axial flow fan, comprising a fan body (1), wherein the fan body (1) includes an air inlet flange (2), characterized in that: The air inlet flange (2) is provided with a noise reduction device, which includes a cylinder (3), a sound-absorbing cotton block (4) is provided inside the cylinder (3), and a connecting flange (5) is provided on the cylinder (3) for fitting with the air inlet flange (2). The air inlet flange (2) is detachably fixed to the connecting flange (5) through a connecting structure.

2. An axial flow fan according to claim 1, characterized in that: The connection structure includes a sliding pin fixedly connected to the connecting flange (5). The air inlet flange (2) is provided with a slot (6) and an arc groove (7) for the sliding pin to be inserted. The slot (6) and the arc groove (7) are perpendicular to each other.

3. An axial flow fan according to claim 2, characterized in that: The sliding pin includes a connecting section (8), on which a rotating sleeve (9) is rotatably connected.

4. An axial flow fan according to claim 3, characterized in that: The connecting section (8) is connected to a threaded section (10), and a threaded sleeve (11) is threadedly connected to the threaded section (10). The air inlet flange (2) is provided with a groove (12) for the threaded sleeve (11) to be inserted.

5. An axial flow fan according to claim 4, characterized in that: The threaded sleeve (11) has several anti-slip grooves (13) on its side wall.

6. An axial flow fan according to claim 1, characterized in that: The sound-absorbing cotton block (4) is detachably installed inside the cylinder (3).

7. An axial flow fan according to claim 6, characterized in that: The inner circumferential wall of the cylinder (3) is provided with several locking strips (14), and the outer circumferential wall of the sound-absorbing cotton is provided with several slots for the locking strips (14) to be inserted.

8. An axial flow fan according to claim 1, characterized in that: The cylinder (3) is made of stainless steel.

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