CN219570454U - Centrifugal induced draft fan for boiler - Google Patents

Abstract

The utility model relates to the technical field of centrifugal induced draft fans, and discloses a centrifugal induced draft fan for a boiler, which solves the problem that a filter screen of the traditional centrifugal induced draft fan for the boiler is easy to block to influence the induced draft effect, and comprises a centrifugal induced draft fan body, wherein an induced draft port is arranged on one side of the centrifugal induced draft fan body, an air outlet is arranged on the other side of the centrifugal induced draft fan body, an induced draft extension pipe is arranged at one end of the induced draft port, an air return pipe is arranged on one side of the air outlet, a filter mechanism is arranged at the other ends of the induced draft extension pipe and the air return pipe, a boiler induced draft pipe and a slag discharge pipe are arranged at one side of the filter mechanism, and a slag ash collecting assembly is arranged at the other end of the slag discharge pipe; through this centrifugal induced air machine can filter boiler exhaust wind at the use, can automatic switch-over filter plate, avoid the filter plate to take place to block up and influence the filter effect, can discharge the particulate matter that filters out.

Description

Centrifugal induced draft fan for boiler

Technical Field

The utility model belongs to the technical field of centrifugal induced fans, and particularly relates to a centrifugal induced fan for a boiler.

Background

Boiler induced draft fans are widely used for ventilation, dust removal and cooling of power production, factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

The boiler can carry the granule impurity at the process of airing exhaust, can take place striking and friction to the boiler draught fan when the granule impurity passes through the boiler draught fan, can cause the flabellum and the bearing of boiler draught fan to take place to damage, influence the life of boiler draught fan, consequently can be provided with the filter screen in the air-supply line of current boiler centrifugal draught fan, but this draught fan is at the use, big granule probably adheres to the surface at the filter screen and then blocks it, the work effect of this draught fan has been reduced, consequently, need a kind can the self-cleaning particulate matter, thereby the centrifugal draught fan for the boiler of improvement filter effect satisfies the user demand.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the centrifugal induced draft fan for the boiler, which effectively solves the problem that the filter screen of the traditional centrifugal induced draft fan for the boiler is easy to be blocked so as to influence the induced draft effect.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a centrifugal draught fan for boiler, includes the centrifugal draught fan body, one side of centrifugal draught fan body is provided with the induced air mouth, the opposite side of centrifugal draught fan body is provided with the air outlet, the one end of induced air mouth is fixed to be provided with induced air extension pipe, one side of air outlet is fixed to be provided with the return air pipe, be provided with the valve on the return air pipe, the one end that induced air extension pipe and return air pipe kept away from the centrifugal draught fan body is provided with filter mechanism, one side that filter mechanism kept away from induced air extension pipe and return air pipe is provided with boiler induced air pipe and scum pipe respectively, the other end and the boiler air exit fixed connection of boiler induced air pipe, the other end of scum pipe is provided with the sediment ash and collects the subassembly, filter mechanism comprises filter housing, rotatory filter assembly and servo motor, servo motor fixed connection is in the intermediate position of filter housing one side, rotatory filter assembly is through pivot swing joint in the inside of filter housing, the one end of pivot and servo motor's output shaft fixed connection.

Preferably, the slag ash collecting assembly consists of a collecting box and a breathable cloth sleeve, wherein the breathable cloth sleeve is fixedly connected between the slag discharging pipe and the collecting box, and a first door body is arranged on the front face of the collecting box.

Preferably, an air inlet connected with a boiler induced air pipe and a slag discharging port connected with a slag discharging pipe are formed in one side of the filtering sleeve, an air outlet connected with an induced air extension pipe and an air return port connected with an air return pipe are formed in one side of the filtering sleeve, sealing rings I are fixedly arranged on inner side edges of the air inlet, the slag discharging port, the air outlet and the air return port, and a door body II is arranged at the bottom end of the filtering sleeve.

Preferably, the rotary filter assembly comprises a rotary support disc, a plurality of filter support sleeves and a plurality of filter screen plates, the rotary support disc is fixedly connected with the rotary shaft, the filter support sleeves are inserted in the rotary support disc and are fixedly connected with the rotary support disc, the filter screen plates are fixedly connected with one end inside the filter support sleeve, two ends of the filter support sleeve are fixedly provided with sealing rings II matched with the sealing rings I, and the sealing rings I and II are made of high-temperature-resistant rubber materials.

Compared with the prior art, the utility model has the beneficial effects that:

(1) In operation, through setting up the filter mechanism that comprises filter shell, rotatory filter component and servo motor, can filter boiler exhaust wind, avoid granule impurity to get into the inside of centrifugal draught fan and cause centrifugal draught fan to take place to damage, can switch the filter screen board through rotatory filter component's rotation simultaneously for filtration work and sediment work go on simultaneously, avoid causing the filter screen board to take place to block up and influence the filter effect;

(2) Through being provided with return air pipe and scum pipe, can utilize the exhaust of air exit to clear up the work to the filter screen board for particulate matter that filters out is discharged from filtering support cover, through setting up the sediment ash collection subassembly that comprises collecting box and ventilative cloth cover, can collect the impurity that filters out, thereby is convenient for unify the processing.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

In the drawings:

FIG. 1 is a schematic view of a centrifugal induced draft fan for a boiler according to the present utility model;

FIG. 2 is a schematic view of a filter housing according to the present utility model;

FIG. 3 is a schematic view of a partial structure of a filter housing according to the present utility model;

FIG. 4 is a schematic view of a rotary filter assembly according to the present utility model;

FIG. 5 is a schematic view of the connection structure of the filter support sleeve and the filter screen plate according to the present utility model;

in the figure: 1. a centrifugal induced draft fan body; 2. an air inlet; 3. an air outlet; 4. an induced draft extension tube; 5. an air return pipe; 6. a valve; 7. a filtering mechanism; 8. a boiler air-guiding pipe; 9. a slag discharge pipe; 10. a slag ash collection assembly; 11. a filter casing; 12. rotating the filter assembly; 13. a servo motor; 14. a rotating shaft; 15. a collection box; 16. breathable cloth cover; 17. a first door body; 18. an air inlet; 19. a slag discharge port; 20. an air outlet; 21. an air return port; 22. a first sealing ring; 23. a second door body; 24. rotating the support plate; 25. a filter support sleeve; 26. a filter screen plate; 27. and a second sealing ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 4, a centrifugal induced draft fan for a boiler of the present utility model comprises a centrifugal induced draft fan body 1, one side of the centrifugal induced draft fan body 1 is provided with an induced draft port 2, the other side of the centrifugal induced draft fan body 1 is provided with an air outlet 3, one end of the induced draft port 2 is fixedly provided with an induced draft extension pipe 4, one side of the air outlet 3 is fixedly provided with a return air pipe 5, a valve 6 is arranged on the return air pipe 5, one ends of the induced draft extension pipe 4 and the return air pipe 5, which are far away from the centrifugal induced draft fan body 1, are provided with a filter mechanism 7, one sides of the filter mechanism 7, which are far away from the induced draft extension pipe 4 and the return air pipe 5, are respectively provided with a boiler induced air pipe 8 and a slag discharge pipe 9, the other ends of the boiler induced air pipes 8 are fixedly connected with a boiler air outlet, the other ends of the slag discharge pipe 9 are provided with a slag dust collecting component 10, the filter mechanism 7 is composed of a filter casing 11, a rotary filter component 12 and a servo motor 13, the rotary filter component 12 is movably connected to the inside the filter casing 11 through a rotary shaft 14, one end of the rotary filter component 14 is fixedly connected to an output shaft of the servo motor 13;

the dust collecting assembly 10 is composed of a collecting box 15 and a ventilation cloth sleeve 16, the ventilation cloth sleeve 16 is fixedly connected between a slag discharging pipe 9 and the collecting box 15, a first door body 17 is arranged on the front surface of the collecting box 15, impurities in the collecting box 15 are conveniently cleaned, an air inlet 18 connected with a boiler air guiding pipe 8 and a slag discharging hole 19 connected with the slag discharging pipe 9 are formed in one side of a filter shell 11, an air outlet 20 connected with an air guiding extension pipe 4 and a return air inlet 21 connected with a return air pipe 5 are formed in one side of the filter shell 11, sealing rings 22 are fixedly arranged on the inner side edges of the air inlet 18, the slag discharging hole 19, the air outlet 20 and the return air inlet 21, a second door body 23 is arranged at the bottom end of the filter 11, the rotary filter assembly 12 is composed of a rotary support disc 24, a plurality of filter support sleeves 25 and a plurality of filter screen 26, the filter support disc 25 is inserted in the rotary support disc 24 and fixedly connected with the rotary support disc 24, the filter screen 26 is fixedly connected with the first sealing rings 27, and the second sealing rings 27 are fixedly connected with the two sealing rings 22 at the two ends of the inner sides of the filter support sleeve 25, and the sealing rings can be matched with the sealing rings 27;

during the use, the one end of boiler induced duct 8 is connected with the air exit of boiler, boiler exhaust flue gas and particulate matter impurity enter into the inside of filtering mechanism 7 through boiler induced duct 8, filter the work through one of them filter screen plate 26 of filtering mechanism 7 inside, flue gas after filtering passes through centrifugal induced draft fan body 1 and air outlet 3 and discharges, when the inside particulate matter of filter screen plate 26 in the use is more, it is rotatory 90 degrees to drive rotatory filter module 12 through servo motor 13, another filter screen plate 26 moves to the filtration position, so push away, rotatory filter module 12 rotates 90 degrees at every turn, when the inside filtration support cover 25 that has more particulate matter moves to the position of slag notch 19 and return air inlet 21, open valve 6, the inside wind of air outlet 3 can blow to have return air duct 5, blow the inside of filtration support cover 25 that is equipped with particulate matter through return air duct 5, thereby can blow into the inside of slag duct 9 with particulate matter, then the inside that the impurity enters into slag collection module 10 is collected, a small amount of impurity can enter into the bottom of filtering 11 in the filtration process, then two regularly open the door 23 can realize the periodic impurity clearance.

In operation, through setting up the filter mechanism that comprises filter shell, rotatory filter component and servo motor, can filter boiler exhaust wind, avoid granule impurity to get into the inside of centrifugal draught fan and cause centrifugal draught fan to take place to damage, can switch the filter screen board through rotatory filter component's rotation simultaneously for filtration work and sediment work go on simultaneously, avoid causing the filter screen board to take place to block up and influence the filter effect; through being provided with return air pipe and scum pipe, can utilize the exhaust of air exit to clear up the work to the filter screen board for the particulate matter that filters out is discharged from filtering support cover, through setting up the sediment ash collection subassembly that comprises collecting box and ventilative cloth cover, can collect the impurity that filters out, thereby is convenient for unify the processing.

Claims (4)

1. A centrifugal induced draft fan for boiler, includes centrifugal induced draft fan body (1), its characterized in that: one side of centrifugal draught fan body (1) is provided with induced air mouth (2), the opposite side of centrifugal draught fan body (1) is provided with air outlet (3), the one end of induced air mouth (2) is fixedly provided with induced air extension pipe (4), one side of air outlet (3) is fixedly provided with return air pipe (5), be provided with valve (6) on return air pipe (5), the one end that induced air extension pipe (4) and return air pipe (5) kept away from centrifugal draught fan body (1) is provided with filter mechanism (7), one side that filter mechanism (7) kept away from induced air extension pipe (4) and return air pipe (5) is provided with boiler induced air pipe (8) and scum pipe (9) respectively, the other end and the boiler air exit fixed connection of scum pipe (8) are provided with sediment ash collection subassembly (10), filter mechanism (7) are by filtering (11), rotatory filter subassembly (12) and servo motor (13) constitute, servo motor (13) fixed connection is in the intermediate position in filtering cover shell (11) one side, rotatory filter subassembly (12) are through the inside of pivot (14) swing joint in filtering output shaft (14).

2. A centrifugal induced draft fan for a boiler according to claim 1 wherein: the slag ash collecting assembly (10) is composed of a collecting box (15) and a ventilation cloth sleeve (16), the ventilation cloth sleeve (16) is fixedly connected between the slag discharging pipe (9) and the collecting box (15), and a first door body (17) is arranged on the front face of the collecting box (15).

3. A centrifugal induced draft fan for a boiler according to claim 1 wherein: an air inlet (18) connected with a boiler air guiding pipe (8) and a slag discharging opening (19) connected with a slag discharging pipe (9) are formed in one side of the filtering sleeve (11), an air outlet (20) connected with an air guiding extension pipe (4) and an air return opening (21) connected with an air return pipe (5) are formed in one side of the filtering sleeve (11), a sealing ring I (22) is fixedly arranged on the inner side edges of the air inlet (18), the slag discharging opening (19), the air outlet (20) and the air return opening (21), and a door body II (23) is arranged at the bottom end of the filtering sleeve (11).

4. A centrifugal induced draft fan for a boiler according to claim 3 wherein: the rotary filter assembly (12) is composed of a rotary support disc (24), a plurality of filter support sleeves (25) and a plurality of filter screen plates (26), the rotary support disc (24) is fixedly connected with the rotary shaft (14), the filter support sleeves (25) are inserted into the rotary support disc (24) and are fixedly connected with the rotary support disc (24), the filter screen plates (26) are fixedly connected with one end inside the filter support sleeve (25), sealing rings II (27) matched with the sealing rings I (22) are fixedly arranged at two ends of the filter support sleeve (25), and the sealing rings I (22) and the sealing rings II (27) are made of high-temperature-resistant rubber materials.