CN214499557U - Draught fan outlet with silencer - Google Patents

Abstract

The utility model discloses an install draught fan export of muffler additional, including draught fan body and ventilation inner tube, the draught fan body is connected with the ventilation outer tube through flange, and the ventilation outer tube sets up in draught fan body right-hand member, inside the ventilation inner tube was fixed in the ventilation outer tube, and the welding of ventilation inner tube inner wall has the apron, the bloop has been seted up to the apron outer wall, and apron internal connection has the sound of inhaling and fills the cotton, the inner groovy has been seted up at ventilation inner tube middle part, and the inside muffler subassembly that is provided with of inner groovy. This install draught fan export of muffler additional is provided with the apron, and the welding of ventilation inner tube inner wall has the tilting apron that the multiunit equidistance distributes, and it is the high slope direction in the low right side in a left side, can guide the wind direction and turn right the transport by a left side, until the bloop that gets into the top, gets into the apron in the sound wave and touches and inhale the sound filling cotton, and some sound energy rubs in the micropore hole internal friction that inhales the sound filling cotton and converts heat energy consumption effluvium into, plays the effect of making an uproar.

Description

Draught fan outlet with silencer

Technical Field

The utility model relates to a waste incineration power plant falls the technical field of making an uproar, specifically is an install draught fan export of muffler additional.

Background

The boiler induced draft fan is a machine which increases the gas pressure and discharges the gas by depending on the mechanical energy input by the motor, is a driven fluid machine, has the same working principle as a turbine compressor, and generally treats the gas as incompressible fluid without considering the change of the specific volume of the gas because the gas flow rate is lower and the pressure change is not large.

Boiler induced draft fans in the market are relatively loud in noise during operation, the configured air quantity of the induced draft fans is large, the power is high, a flue of an outlet of the induced draft fan is short from a chimney and has a continuous bend angle, and air flow directly rubs with a pipe bend angle to easily cause noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an install draught fan export of muffler additional to the boiler draught fan on the market that proposes in solving above-mentioned background art is great in noise when the operation, and the draught fan configuration amount of wind is big, power is big, and draught fan export flue is short and have continuous bent angle apart from the chimney, thereby the air current directly with the problem of pipeline bent angle department friction arouse the noise easily.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an install draught fan export of muffler additional, includes draught fan body and ventilation inner tube, the draught fan body is connected with the ventilation outer tube through flange, and the ventilation outer tube sets up in draught fan body right-hand member, inside the ventilation inner tube was fixed in the ventilation outer tube, and the welding of ventilation inner tube inner wall has the apron, the bloop has been seted up to the apron outer wall, and the apron internal connection has the sound of inhaling and fills the cotton, the inner groovy has been seted up at ventilation inner tube middle part, and the inner groovy is inside to be provided with the muffler subassembly, both ends are fixed with the holding ring about the muffler subassembly, and have seted up the air intake in the middle part of the muffler subassembly left end, the muffler subassembly is inside to be fixed with induced air metal sheet, and induced air metal sheet surface has seted up the ventilation hole, muffler subassembly right-hand member is connected with the contact tube, and the contact tube is provided with the air outlet.

Preferably, the draught fan body forms a fixed structure through the connection flange and between the outer ventilation pipe, and the central axis of the outer ventilation pipe and the central axis of the inner ventilation pipe are located on the same horizontal line.

Preferably, the scales are distributed at equal intervals on the inner wall of the ventilation inner pipe, and the scales are inclined.

Preferably, the sound-absorbing filling cotton forms a full-surrounding structure through the ventilation inner pipe and the ventilation outer pipe, and the sound-absorbing filling cotton is microporous.

Preferably, the inner wall structure size of the inner groove is matched with the outer opening structure size of the silencer assembly, and the silencer assembly forms a buckle structure with the ventilation inner tube through the inner groove.

Preferably, the locating ring is bilateral symmetry about muffler subassembly axis and distributes, and the muffler subassembly passes through to constitute fixed knot between locating ring and the ventilation inner tube and constructs.

Preferably, the delivery pipe and the silencer assembly are of a welding integrated structure, and the delivery pipe is provided with two delivery pipes.

Compared with the prior art, the beneficial effects of the utility model are that: the inner wall of the ventilation inner pipe is welded with a plurality of groups of inclined scale plates distributed at equal intervals, the inclined scale plates are in an inclined direction with a lower left part and a higher right part, the wind direction can be guided to be conveyed from left to right until the wind direction enters the sound eliminating hole at the top end, when sound waves enter the scale plates and contact the sound absorbing filling cotton, a part of sound energy is rubbed in the pores of the microporous sound absorbing filling cotton and is converted into heat energy to be consumed and dissipated, and the noise reduction effect is achieved;

the silencer component is buckled and limited in the middle of the ventilation inner pipe through the oblate inner groove matched with the silencer component in structural size, so that the silencer component is prevented from being separated and falling off, and further, the positioning rings symmetrically fixed by the positioning rings are attached to the two side surfaces of the silencer component for fixing, so that the connection firmness of the silencer component is ensured;

the welding of muffler subassembly rear end has two contact tubes, evenly accepts the sound wave that comes from the inboard processing of muffler subassembly, later through the air outlet reunion together for two lists of sound waves take place when the stack when interfering and offset each other and then weaken the sound intensity, play the effect of amortization.

Drawings

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

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

fig. 3 is a schematic view of a three-dimensional structure of the silencer assembly of the present invention.

In the figure: 1. a draught fan body; 2. a ventilated outer tube; 3. a connecting flange; 4. a ventilation inner tube; 5. a scale plate; 6. a silencing hole; 7. sound-absorbing filling cotton; 8. an inner groove; 9. a muffler assembly; 10. a positioning ring; 11. an air inlet; 12. an air-inducing metal plate; 13. a vent hole; 14. a delivery pipe; 15. and (7) air outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an induced draft fan outlet with a silencer additionally arranged comprises an induced draft fan body 1, a ventilation outer pipe 2, a connecting flange 3, a ventilation inner pipe 4, a scale plate 5, a silencing hole 6, sound-absorbing filling cotton 7, an inner groove 8, a silencer component 9, a positioning ring 10, an air inlet 11, an induced draft metal plate 12, a ventilation hole 13, a guide pipe 14 and an air outlet 15, wherein the induced draft fan body 1 is connected with the ventilation outer pipe 2 through the connecting flange 3, the ventilation outer pipe 2 is arranged at the right end of the induced draft fan body 1, the ventilation inner pipe 4 is fixed inside the ventilation outer pipe 2, the scale plate 5 is welded on the inner wall of the ventilation inner pipe 4, the induced draft fan body 1 forms a fixed structure between the connecting flange 3 and the ventilation outer pipe 2, the central axis of the ventilation outer pipe 2 and the central axis of the ventilation inner pipe 4 are in the same horizontal line, the left end of the induced draft fan body 1 is fixedly connected with the ventilation outer pipe 2 through the connecting flange 3, the two connecting flanges 3 which are in butt joint tightly, The air tightness is improved firmly and effectively;

the outer wall of the apron 5 is provided with sound absorption holes 6, sound absorption filling cotton 7 is connected inside the apron 5, the apron 5 is distributed on the inner wall of the ventilation inner pipe 4 at equal intervals, the apron 5 is inclined, a plurality of groups of inclined apron 5 distributed at equal intervals are welded on the inner wall of the ventilation inner pipe 4, the inclined apron is in an inclined direction with a lower left part and a higher right part, the wind direction can be guided to be conveyed from left to right until the wind enters the sound absorption holes 6 at the top end, when sound waves enter the apron 5 and contact the sound absorption filling cotton 7, part of sound energy is rubbed in the pores of the microporous sound absorption filling cotton 7 and is converted into heat energy to be consumed and dissipated, and the noise reduction effect is achieved;

an inner groove 8 is formed in the middle of the ventilation inner tube 4, a silencer component 9 is arranged in the inner groove 8, the structural size of the inner wall of the inner groove 8 is matched with the structural size of an outer opening of the silencer component 9, the silencer component 9 forms a buckling structure with the ventilation inner tube 4 through the inner groove 8, and the silencer component 9 is buckled and limited in the middle of the ventilation inner tube 4 through the oblate inner groove 8 matched with the structural size of the silencer component 9, so that the ventilation inner tube 4 is prevented from being separated and falling;

positioning rings 10 are fixed at the left end and the right end of the silencer assembly 9, an air inlet 11 is formed in the middle of the left end of the silencer assembly 9, the positioning rings 10 are symmetrically distributed in the left-right direction relative to the central axis of the silencer assembly 9, the silencer assembly 9 forms a fixing structure with the ventilation inner tube 4 through the positioning rings 10, after the silencer assembly 9 is positioned through the buckle of the inner groove 8, the positioning rings 10 which are symmetrically fixed are further attached to the surfaces of the two sides of the silencer assembly 9 for fixing, and the connection firmness degree of the silencer assembly 9 is ensured;

muffler subassembly 9 is inside to be fixed with induced air metal sheet 12, and ventilation hole 13 has been seted up on induced air metal sheet 12 surface, muffler subassembly 9 right-hand member is connected with contact tube 14, and contact tube 14 right-hand member is provided with air outlet 15, contact tube 14 is welding integrated structure with muffler subassembly 9, and contact tube 14 has two, muffler subassembly 9 rear end welding has two contact tubes 14, evenly accept the sound wave from the inboard processing of muffler subassembly 9, later converge together again through air outlet 15, make two sound waves offset each other and then weaken the sound intensity when taking place to interfere when the stack, play the effect of amortization.

The working principle is as follows: for the kind of induced draft fan outlet equipped with silencer, firstly the gas circulating in the induced draft fan body 1 is led into the ventilation outer pipe 2, the left end of the induced draft fan body 1 is fixedly connected with the ventilation outer pipe 2 through the connecting flange 3, the two are tightly and firmly connected through the two connecting flanges 3 which are butted, the air tightness is effectively improved, the inner wall of the ventilation inner pipe 4 is welded with a plurality of groups of inclined scale plates 5 which are distributed equidistantly, the inclined scale plates are in the inclined direction with lower left and higher right, the wind direction can be guided to be conveyed from left to right until entering the muffling hole 6 at the top end, when the sound wave enters the scale plates 5 and contacts the sound absorbing filling cotton 7, a part of sound energy is rubbed in the pores of the microporous sound absorbing filling cotton 7 and is converted into heat energy to be dissipated, the noise reduction effect is achieved, then the fluid passes through the air inlet 11 of the silencer component 9 at the middle part and enters the ventilation holes 13 which are uniformly distributed on the internal air inducing metal plate 12, the generated air flow noise is separated by the ventilation hole 13, so that the air passes through the ventilation hole 13 with the minimum diameter on the upper surface of the induced air metal plate 12 to form a micro-perforated plate structure, then the air contacts with the wall plate of the silencer component 9 to form a resonance sound absorption structure with low sound quality and high sound resistance with the wall plate, the noise reduction effect is achieved, the oblate cylindrical inner groove 8 which is matched with the structural size of the silencer component 9 mutually enables the silencer component 9 to be buckled and limited in the middle of the ventilation inner tube 4, the separation and the falling of the ventilation inner tube are prevented, and the two positioning rings 10 which are symmetrically fixed are further attached to the two side surfaces of the silencer component 9 for fixing, the connection firmness degree of the silencer component 9 is ensured, two outlet pipes 14 are welded at the rear end of the silencer component 9, the processed sound waves from the inner side of the silencer component 9 are uniformly received, and then are converged together through the air outlet 15, make two sound waves offset each other and then weaken the sound intensity when taking place to interfere when the stack, play the effect of amortization, at last the fluid is carried the chimney of intercommunication from ventilation inner tube 4 and is discharged, just so accomplishes the use of whole induced draft fan export of installing the muffler additional.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides an install draught fan export of muffler additional, includes draught fan body (1) and ventilation inner tube (4), its characterized in that: the draught fan is characterized in that the draught fan body (1) is connected with the ventilation outer pipe (2) through a connecting flange (3), the ventilation outer pipe (2) is arranged at the right end of the draught fan body (1), the ventilation inner pipe (4) is fixed inside the ventilation outer pipe (2), the ventilation inner pipe (4) is welded with the apron (5) on the inner wall, a silencing hole (6) is formed in the outer wall of the apron (5), the apron (5) is internally connected with sound-absorbing filling cotton (7), an inner groove (8) is formed in the middle of the ventilation inner pipe (4), a silencer assembly (9) is arranged inside the inner groove (8), positioning rings (10) are fixed at the left end and the right end of the silencer assembly (9), an air inlet (11) is formed in the middle of the left end of the silencer assembly (9), an induced air metal plate (12) is fixed inside the silencer assembly (9), and ventilation holes (13) are formed in the surface of the induced air metal plate (12), the right end of the silencer component (9) is connected with a delivery pipe (14), and an air outlet (15) is formed in the right end of the delivery pipe (14).

2. The induced draft fan outlet with the silencer according to claim 1, wherein: draught fan body (1) passes through between flange (3) and the outer tube that ventilates (2) and constitutes fixed knot to be constructed, and ventilates outer tube (2) axis and ventilate inner tube (4) axis and be in same water flat line.

3. The induced draft fan outlet with the silencer according to claim 1, wherein: the inner walls of the ventilation inner pipes (4) of the scale plates (5) are distributed at equal intervals, and the scale plates (5) are inclined.

4. The induced draft fan outlet with the silencer according to claim 1, wherein: inhale sound infill cotton (7) and pass through to constitute full enclosure structure between ventilation inner tube (4) and ventilation outer tube (2), just inhale sound infill cotton (7) and be the micropore form.

5. The induced draft fan outlet with the silencer according to claim 1, wherein: the inner wall structure size of the inner groove (8) is matched with the outer opening structure size of the silencer assembly (9), and the silencer assembly (9) forms a buckling structure with the ventilation inner tube (4) through the inner groove (8).

6. The induced draft fan outlet with the silencer according to claim 1, wherein: the positioning ring (10) is distributed in a bilateral symmetry mode about the central axis of the silencer component (9), and the silencer component (9) forms a fixing structure with the ventilation inner pipe (4) through the positioning ring (10).

7. The induced draft fan outlet with the silencer according to claim 1, wherein: the delivery pipe (14) and the silencer component (9) are of a welding integrated structure, and the delivery pipe (14) is provided with two.

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