Silencer at outlet of induced draft fan

Abstract

The utility model discloses an induced draft fan outlet silencer which comprises an induced draft fan body, an air outlet pipe opening of the induced draft fan body is connected with a connecting pipe through a flange connector, a working box body is arranged at the end, away from the flange connector, of the connecting pipe, and an elastic screen is fixedly connected to the inner wall of the working box body. An impurity pipe is arranged on one side wall of the working box body, the impurity pipe is attached to the elastic screen, a fixing block is fixedly connected to the outer wall of the side, away from the impurity pipe, of the working box body, a rotating motor is fixedly connected to one side wall of the fixing block, and a rotating rod is fixedly connected to an output shaft of the rotating motor; the rotating rod penetrates through the working box body, and the end, away from the rotating motor, of the rotating rod is fixedly connected with an oval block. According to the utility model, impurities in extracted gas can be screened out, and the gas impurities are prevented from being accumulated in the silencer, so that the working effect of the silencer is improved, and the silencing quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the export muffling technical field especially, relates to a kind of fan outlet muffler. BACKGROUND

[0002] Fan is widely used in factory, mine, tunnel, cooling tower, vehicle, ship and building ventilation, dust removal and cooling;Boiler and industrial furnace ventilation and air supply;Air conditioning equipment and household appliance cooling and ventilation;Grain drying and selection send;Wind tunnel air source and air cushion ship inflation and propulsion etc.;Fan is a device that generates negative pressure by impeller rotation, and then extracts air from the system (equipment).

[0003] At present, when using boiler, fan is installed at its tail, for extracting hot flue gas in furnace, however, when using fan to extract gas, a large amount of noise is generated, at this time, muffler needs to be installed, and since the extracted gas contains impurities, accumulation is generated when passing through muffler, so that muffler cannot complete muffling work well, greatly affecting its muffling effect, and the outlet of existing fan is only muffled by simple muffler, and the muffling effect is extremely poor.

[0004] Therefore, we propose a kind of fan outlet muffler to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in prior art, such as: fan extracts gas containing impurities in boiler, accumulation is generated when passing through muffler, greatly affecting its muffling effect, and the outlet of existing fan is only muffled by simple muffler, and the muffling effect is extremely poor, and a kind of fan outlet muffler is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of fan outlet muffler, including fan main body, the air outlet of the fan main body is connected with connecting pipe by flange interface, the connecting pipe is provided with working box body at the end away from flange interface, the inner wall of the working box body is fixedly connected with elastic screen, one side wall of the working box body is provided with impurity pipe, the impurity pipe is set to be attached with elastic screen, the outer wall of the side of the working box body away from impurity pipe is fixedly connected with fixed block, the side wall of the fixed block is fixedly connected with rotating motor, the output shaft of the rotating motor is fixedly connected with rotating rod, the rotating rod is set to pass through working box body, the end of the rotating rod away from rotating motor is fixedly connected with oval block, the oval block is set to be attached with elastic screen, the inner wall of the side of the working box body close to elastic screen is provided with muffling mechanism.

[0008] Preferably, the sound elimination mechanism comprises a plurality of dispersion plate blocks fixedly connected to the inner wall of the working box body near the side of the elastic screen, one side wall of each of the plurality of dispersion plate blocks is provided with a plurality of dispersion ports, the side wall of the working box body away from the connecting pipe is provided with an outlet pipe, and the end of the outlet pipe away from the working box body is provided with a sound eliminator.

[0009] Preferably, the side wall of the air outlet pipe of the air guide fan body and the connecting pipe is provided with sound insulation cotton.

[0010] Preferably, the bottom side wall of the air guide fan body is fixedly connected with a support seat.

[0011] Preferably, the outer wall of the side of the working box body near the impurity pipe is fixedly connected with a plurality of supports.

[0012] Preferably, the end of the impurity pipe away from the working box body is provided with a collection box.

[0013] In the utility model, the beneficial effects are:

[0014] 1: When the elliptical block rotates, the elastic screen can be intermittently hit, the impurities remaining on the elastic screen are knocked off, and the impurities flow into the collection box through the impurity pipe, so that the problem that the extracted gas contains impurities and causes accumulation when passing through the sound eliminator, resulting in poor sound elimination work, etc. can be avoided.

[0015] 2: The plurality of dispersion plate blocks and the plurality of dispersion ports can block and disperse the gas, make the airflow form a circulating rolling, reduce the overflow speed of the gas, and then reduce the sound pressure of the gas exhaust, and the sound insulation cotton can also better realize sound elimination of the air guide fan body and the connecting pipe, so that the sound elimination effect is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a front structure sectional view of the air guide fan outlet sound eliminator.

[0017] Fig. 2 It is a top view of the elliptical block part structure of the air guide fan outlet sound eliminator.

[0018] Fig. 3 It is a side view of the dispersion plate block and dispersion port structure of the air guide fan outlet sound eliminator.

[0019] In the drawing: 1 air guide fan body, 2 flange interface, 3 connecting pipe, 4 elastic screen, 5 impurity pipe, 6 collection box, 7 fixed block, 8 rotating motor, 9 rotating rod, 10 elliptical block, 11 dispersion plate block, 12 dispersion port, 13 outlet pipe, 14 sound eliminator, 15 sound insulation cotton, 16 support seat, 17 support, 18 working box body. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figs. 1-3 A silencer for the outlet of an induced draft fan includes an induced draft fan body 1. A support base 16 is fixedly connected to the bottom side wall of the induced draft fan body 1, providing good stability support for the induced draft fan body 1 during operation. The outlet of the induced draft fan body 1 is connected to a connecting pipe 3 via a flange interface 2. Both the outlet of the induced draft fan body 1 and the side wall of the connecting pipe 3 are equipped with sound-absorbing cotton 15, allowing for better noise reduction. The flange interface 2 is connected by bolts. A working box 18 is located at the end of the connecting pipe 3 away from the flange interface 2. Multiple brackets 17 are fixedly connected to the outer wall of the working box 18 near the impurity pipe 5, providing stable support for the working box 18 and ensuring its good working effect. A series of... The elastic screen 4 has an impurity pipe 5 on one side wall of the working box 18. A collection box 6 is provided at the end of the impurity pipe 5 away from the working box 18. The collection box 6 can better collect the removed impurities. The impurity pipe 5 is set in close contact with the elastic screen 4. A fixing block 7 is fixedly connected to the outer wall of the working box 18 away from the impurity pipe 5. A rotating motor 8 is fixedly connected to one side wall of the fixing block 7. A rotating rod 9 is fixedly connected to the output shaft of the rotating motor 8. The rotating rod 9 is set through the working box 18. An elliptical block 10 is fixedly connected to the end of the rotating rod 9 away from the rotating motor 8. The elliptical block 10 is set in close contact with the elastic screen 4. Due to the characteristics of the elliptical block 10, when the elliptical block 10 rotates, it can intermittently strike the elastic screen 4 and knock off the impurities remaining on the elastic screen 4.

[0022] A silencing mechanism is provided on the inner wall of the working chamber 18 near the elastic screen 4. The silencing mechanism includes multiple dispersing plates 11 fixedly connected to the inner wall of the working chamber 18 near the elastic screen 4. Multiple dispersing ports 12 are provided on one side wall of each of the multiple dispersing plates 11. When the gas passes through the multiple dispersing plates 11 and multiple dispersing ports 12, the gas is blocked and dispersed, allowing the airflow to form a circulating rolling, reducing the speed of gas overflow, and thus reducing the sound pressure of the gas discharge. An outlet pipe 13 is provided on the side wall of the working chamber 18 away from the connecting pipe 3. A silencer 14 is provided at the end of the outlet pipe 13 away from the working chamber 18. The silencer 14 can perform noise reduction work on the gas. This technology is existing technology, so it will not be described in detail.

[0023] The utility model discloses a fan main part 1 is installed in the specified position first, starts the power switch, and the fan main part 1 starts working, and the gas is extracted from the air outlet pipe, and the gas is flowed into the working box 18 through the connecting pipe 3, and the impurities in the gas are removed through the check of the elastic screen 4, and the rotating motor 8 is started, and the output shaft of rotating motor 8 produces rotation, and the rotating rod 9 is rotated, and then the elliptical block 10 is rotated, because of the characteristics of the elliptical block 10, when the elliptical block 10 is rotated, the elastic screen 4 can be intermittently beaten, and the impurities on the elastic screen 4 are knocked down, and the impurities are flowed into the collecting box 6 through the impurity pipe 5, so the gas extracted can avoid containing the impurities, and the problem that the sound absorber 14 is accumulated when passing through, leading to the sound-absorbing work of not being good etc.

[0024] The gas is removed simultaneously, and the gas is blocked and dispersed through the setting of multiple dispersion plate blocks 11 and multiple dispersion ports 12 in the working box 18, the airflow forms circulating rolling, the speed of gas overflow is reduced, the sound pressure of gas discharge is reduced, and finally the sound absorber 14 is passed through again to better sound-absorbing effect while discharging the gas, and the setting of the sound-absorbing cotton 15 can better realize the sound-absorbing of the fan main part 1 and the connecting pipe 3.

[0025] The above is only the preferred specific implementation mode of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and the utility model concept of the utility model, is equivalent to replace or change, should be covered in the protection scope of the utility model.

Claims

1. A silencer for the outlet of an induced draft fan, comprising an induced draft fan body (1), characterized in that, The air outlet of the blower body (1) is connected to the connecting pipe (3) via a flange interface (2). A working box (18) is provided at the end of the connecting pipe (3) away from the flange interface (2). An elastic screen (4) is fixedly connected to the inner wall of the working box (18). An impurity pipe (5) is provided on one side wall of the working box (18), and the impurity pipe (5) is fitted to the elastic screen (4). A [missing information - likely a device or material] is fixedly connected to the outer wall of the working box (18) away from the impurity pipe (5). A fixed block (7) is fixedly connected to a rotating motor (8) on one side wall of the fixed block (7). A rotating rod (9) is fixedly connected to the output shaft of the rotating motor (8). The rotating rod (9) passes through the working box (18). An elliptical block (10) is fixedly connected to the end of the rotating rod (9) away from the rotating motor (8). The elliptical block (10) is fitted with the elastic screen (4). A sound-absorbing mechanism is provided on the inner wall of the working box (18) near the elastic screen (4).

2. The induced draft fan outlet silencer according to claim 1, characterized in that, The silencing mechanism includes multiple dispersing plates (11) fixedly connected to the inner wall of the working box (18) near the elastic screen (4). Multiple dispersing ports (12) are provided on one side wall of each of the multiple dispersing plates (11). An outlet pipe (13) is provided on the side wall of the working box (18) away from the connecting pipe (3). A silencer (14) is provided at one end of the outlet pipe (13) away from the working box (18).

3. The induced draft fan outlet silencer according to claim 1, characterized in that, The air outlet of the main body (1) of the induced draft fan and the side wall of the connecting pipe (3) are both provided with sound-absorbing cotton (15).

4. The induced draft fan outlet silencer according to claim 1, characterized in that, A support base (16) is fixedly connected to the bottom side wall of the main body (1) of the induced draft fan.

5. A silencer for the outlet of an induced draft fan according to claim 1, characterized in that, Multiple supports (17) are fixedly connected to the outer wall of the working box (18) near the impurity tube (5).

6. The induced draft fan outlet silencer according to claim 1, characterized in that, The impurity tube (5) is provided with a collection box (6) at the end away from the working box (18).

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