CN216589185U - Low-noise centrifugal fan - Google Patents

Abstract

The utility model discloses a low-noise centrifugal fan in the technical field of centrifugal fans, which comprises a centrifugal fan body, an air inlet pipe and an air outlet pipe, wherein the air inlet pipe is communicated with the front side surface of the centrifugal fan body, the air outlet pipe is communicated with the right side surface of the centrifugal fan body, a sound insulation shell is sleeved outside the centrifugal fan body, a sound absorption cotton sleeve is sleeved outside the air inlet pipe, a plurality of air inlet holes are formed in the side surface of the sound absorption cotton sleeve, positioning rods are slidably arranged on the left side and the right side of the sound absorption cotton sleeve in a penetrating manner, one ends of the positioning rods extend into the air inlet pipe in a penetrating manner, an operating plate is arranged at the other ends of the positioning rods, and an annular sound absorption layer is arranged on the inner wall surface of the air inlet pipe; according to the utility model, the sound absorption cotton sleeve and the annular sound absorption layer are arranged, the sound of airflow flowing is absorbed when the airflow passes through the air holes by utilizing the effect of matching the sound absorption cotton sleeve with the air holes, and the airflow is guided by utilizing the effects of the annular sound absorption sleeve and the air deflector, so that the area of the inner wall of the air inlet pipe rubbed by the airflow is reduced, and the workers can communicate normally.

Description

Low-noise centrifugal fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan.

Background

Centrifugal fan is a support equipment that utilizes the mechanical energy of input, improves gas pressure and discharge gas, and along with continuous development such as mill, mine, tunnel, need utilize centrifugal fan to ventilate, arrange dirt and cooling, along with the continuous development of science and technology, people are also higher and higher to centrifugal fan's manufacturing process requirement.

At present centrifugal fan in the use, the flow of air current and the friction of air current and centrifugal fan inner wall contact produce great sound, not only lead to centrifugal fan's use to cause noise pollution, still can influence the normal interchange between the staff.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-noise centrifugal fan, which solves the problems that the flow of air flow and the contact friction between the air flow and the inner wall of the centrifugal fan generate loud sound during the use of the conventional centrifugal fan in the background art, so that the use of the centrifugal fan causes noise pollution and normal communication among workers is influenced.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a low noise centrifugal fan, includes centrifugal fan body and the air-supply line of intercommunication at centrifugal fan body leading flank and the play tuber pipe of right flank, centrifugal fan body cup joints the shell that gives sound insulation outward, the air-supply line cup joints sound absorption cotton cover outward, sound absorption cotton cover's side has been seted up a plurality of inlet port, sound absorption cotton cover's the left and right sides all slides and runs through and install the locating lever, the one end of locating lever runs through and extends to in the air-supply line, the operation panel is installed to the other end of locating lever, annular sound absorbing layer is installed to the internal face of air-supply line, the aviation baffle is installed to the internal face on annular sound absorbing layer.

Preferably, the front side and the rear side of the inner wall of the air outlet pipe are respectively hinged with an inclined plate, and sound-absorbing plates are respectively arranged on one opposite side surfaces of the two inclined plates.

Preferably, the front side face and the rear side face of the inner wall of the air outlet pipe are both provided with springs, and the other ends of the springs are both fixedly connected with the inclined plate.

Preferably, a telescopic rod is arranged in the spring and is hinged to one side face of the inner wall of the air outlet pipe, and the end part of a telescopic shaft of the telescopic rod is hinged to the inclined plate.

Preferably, a bottom plate is arranged below the centrifugal fan body, a sponge cushion is arranged on the upper surface of the bottom plate, and the centrifugal fan body is located on the sponge cushion.

Preferably, the L-shaped plates are installed on the front side face and the rear side face of the bottom plate, the vertical portions of the L-shaped plates are in threaded connection with bolts, and one ends of the bolts penetrate through the vertical portions of the L-shaped plates to be in threaded connection with the sound insulation shell.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the sound-absorbing cotton sleeve and the annular sound-absorbing layer are arranged, the sound flowing sound of the air flow is absorbed when the air flow passes through the air holes by utilizing the effect of matching the sound-absorbing cotton sleeve with the air holes, and the air flow is guided by utilizing the effects of the annular sound-absorbing sleeve and the air deflector, so that the area of the inner wall of the air inlet pipe rubbed by the air flow is reduced, and the workers can communicate normally.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of a cross-sectional structure of the low noise centrifugal fan of the present invention;

fig. 3 is an enlarged schematic view of a portion a of the low noise centrifugal fan of the present invention shown in fig. 2.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a centrifugal fan body; 2. an air inlet pipe; 3. an air outlet pipe; 4. an air deflector; 5. a sound-absorbing cotton cover; 6. positioning a rod; 7. an operation panel; 8. a base plate; 9. a sponge cushion; 10. an L-shaped plate; 11. a bolt; 12. a sound-insulating shell; 13. an inclined plate; 14. a sound-absorbing panel; 15. a telescopic rod; 16. a spring; 17. an air inlet; 18. annular sound absorbing layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a low-noise centrifugal fan comprises a centrifugal fan body 1, an air inlet pipe 2 communicated with the front side surface of the centrifugal fan body 1 and an air outlet pipe 3 communicated with the right side surface, a sound insulation shell 12 is sleeved outside the centrifugal fan body 1, a sound absorption cotton sleeve 5 is sleeved outside the air inlet pipe 2, the sound absorption cotton sleeve 5 is matched with an air vent under the action of the sound absorption cotton sleeve 5, make the air current absorb the sound that the air current flows when passing the bleeder vent, inhale the side of sound cotton cover 5 and seted up a plurality of inlet port 17, inhale the equal slip of the left and right sides of sound cotton cover 5 and run through and install locating lever 6, the one end of locating lever 6 runs through and extends to in the air-supply line 2, operation panel 7 is installed to the other end of locating lever 6, annular sound absorption layer 18 is installed to the internal face of air-supply line 2, aviation baffle 4 is installed to the internal face of annular sound absorption layer 18, utilize the effect of annular sound absorption cover and aviation baffle 4, lead to the air current, reduce the area of air current friction air-supply line 2 inner wall.

Wherein, it has hang plate 13 all to articulate to go out the front and back both sides of 3 inner walls of tuber pipe, and abatvoix 14 is all installed to two relative sides of hang plate 13, through setting up hang plate 13 and abatvoix 14, utilizes hang plate 13 to cushion the air current of going out tuber pipe 3, and then the sound that the air current sent when reducing the air-out, and the sound when the effect of cooperation abatvoix 14 is to exhausting absorbs, and then reaches the effect of making an uproar.

Wherein, spring 16 is all installed to the front and back both sides face of play tuber pipe 3 inner wall, and spring 16's the other end all with hang plate 13 fixed connection, through setting up spring 16, utilizes spring 16's elasticity to reset hang plate 13 after the removal, and then conveniently seals play tuber pipe 3, prevents to pile up too much dust in the play tuber pipe 3 of long-term work, simple structure.

Wherein, be provided with the articulated telescopic link 15 of installing in the 3 inner wall side of tuber pipe in the spring 16, the telescopic shaft tip and the hang plate 13 of telescopic link 15 are articulated to be connected, through setting up telescopic link 15, utilize the extensibility of telescopic link 15 to support the stay cord process of spring 16, and then the stability when increase spring 16 is tensile, increase spring 16's life for the stable support work that resets to hang plate 13 of spring 16.

Wherein, the below of centrifugal fan body 1 is provided with bottom plate 8, and the last surface mounting of bottom plate 8 has foam-rubber cushion 9, and centrifugal fan body 1 is located foam-rubber cushion 9, through setting up foam-rubber cushion 9, utilizes the compliance of foam-rubber cushion 9, cushions the fixed between centrifugal fan body 1 and the ground, and the shaking force that produces when centrifugal fan body 1 during operation is cushioned by foam-rubber cushion 9, and then further increase noise reduction's effect.

Wherein, L shaped plate 10 is all installed to bottom plate 8's front and back both sides face, and the vertical part threaded connection of L shaped plate 10 has bolt 11, and the vertical part and the 12 threaded connection of shell that give sound insulation that L shaped plate 10 was passed to bolt 11's one end, through setting up bolt 11, utilize bolt 11 and 12 threaded connection's of shell that give sound insulation effect to fix bottom plate 8, also make things convenient for later stage staff to dismantle bottom plate 8, and then overhaul work to centrifugal fan's bottom.

Start centrifugal fan body 1, centrifugal fan body 1 absorbs gas through air-supply line 2, gas passes in the bleeder vent gets into air-supply line 2, the sound of air current is absorbed to the cotton cover 5 of sound absorption utilization, then utilize annular sound absorption layer 18 to carry out the secondary absorption to sound, through aviation baffle 4's effect, and then centrifugal fan body 1, then discharge through going out tuber pipe 3, when the air current is from going out tuber pipe 3, the air current outwards promotes two hang plates 13, the distance between two hang plates 13 increases gradually this moment, hang plate 13 extrusion telescopic link 15 and spring 16, utilize abatvoix 14 to inhale sound work to the air current of giving vent to anger, and then play the effect of making an uproar.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims (6)

1. The utility model provides a low noise centrifugal fan which characterized in that: including centrifugal fan body (1) and intercommunication air-supply line (2) and the play tuber pipe (3) of right flank at centrifugal fan body (1) leading flank, it has syllable-dividing shell (12) to cup joint outward centrifugal fan body (1), air-supply line (2) cup joint has sound cotton cover (5) of inhaling, a plurality of inlet port (17) have been seted up to the side of inhaling sound cotton cover (5), inhale the equal slip of the left and right sides of sound cotton cover (5) and run through and install locating lever (6), the one end of locating lever (6) is run through and is extended to air-supply line (2) in, operation board (7) are installed to the other end of locating lever (6), annular sound absorbing layer (18) are installed to the internal face of air-supply line (2), aviation baffle (4) are installed to the internal face of annular sound absorbing layer (18).

2. A low noise centrifugal fan according to claim 1, wherein: go out the front and back both sides of tuber pipe (3) inner wall and all articulate there are hang plate (13), two abatvoix (14) are all installed to the relative side of hang plate (13).

3. A low noise centrifugal fan according to claim 1, wherein: the front side face and the rear side face of the inner wall of the air outlet pipe (3) are respectively provided with a spring (16), and the other end of each spring (16) is fixedly connected with the inclined plate (13).

4. A low noise centrifugal fan according to claim 3, wherein: the air outlet pipe is characterized in that a telescopic rod (15) which is hinged to one side surface of the inner wall of the air outlet pipe (3) is arranged in the spring (16), and the end part of a telescopic shaft of the telescopic rod (15) is hinged to the inclined plate (13).

5. A low noise centrifugal fan according to claim 1, wherein: the centrifugal fan is characterized in that a bottom plate (8) is arranged below the centrifugal fan body (1), a spongy cushion (9) is arranged on the upper surface of the bottom plate (8), and the centrifugal fan body (1) is located on the spongy cushion (9).

6. A low noise centrifugal fan according to claim 5, wherein: l shaped plate (10) are all installed to the front and back both sides face of bottom plate (8), the vertical part threaded connection of L shaped plate (10) has bolt (11), the vertical part and the shell that gives sound insulation (12) threaded connection of L shaped plate (10) are passed to the one end of bolt (11).

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