CN210978006U - Silencer for centrifugal ventilator - Google Patents

Abstract

The utility model belongs to the technical field of the muffler, especially, be a muffler for centrifugal fan, including body, two screw installing frames, pin, rubber strip, centrifugal fan and noise reduction mechanism, two screw installing frames weld respectively on the both ends outer wall of body, pin and centrifugal fan pass through bolt fixed connection with two screw installing frames respectively, one side fixed connection that rubber strip and pin are close to the body, noise reduction mechanism installs in the body, noise reduction mechanism is including a first rectangle section of thick bamboo, be equipped with a second rectangle section of thick bamboo in the first rectangle section of thick bamboo. The utility model discloses the practicality is strong, can make the air current that comes out from centrifugal fan change direction many times in the muffler for the air current stops the time extension in the muffler, thereby makes the noise absorbed many times by sound absorbing material in the muffler, has improved noise cancelling effect, and this device can conveniently change and maintain canceling release mechanical system.

Description

Silencer for centrifugal ventilator

Technical Field

The utility model relates to a muffler technical field especially relates to a muffler for centrifugal fan.

Background

The centrifugal ventilator is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal ventilators are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion. But centrifugal fan can produce very big noise at high-speed operation in-process, and centrifugal fan uses the muffler to fall and makes an uproar usually, and traditional muffler noise cancelling effect is general, and the air that flows in the fan is too short in the flow time of muffler for can be by the absorptive noise of muffler is few, can't reach fine noise reduction effect, for this reason, provides a muffler for centrifugal fan.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a silencer for a centrifugal fan.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a silencer for a centrifugal ventilator comprises a pipe body, two screw mounting frames, a stop lever, a rubber strip, a centrifugal ventilator and a silencing mechanism, wherein the two screw mounting frames are respectively welded on the outer walls of the two ends of the pipe body;

the silencing mechanism comprises a first rectangular cylinder, a second rectangular cylinder is arranged in the first rectangular cylinder, first silencing cotton is filled between the first rectangular cylinder and the second rectangular cylinder, rectangular frames are fixedly arranged at two ends of the first rectangular cylinder, two ends of the second rectangular cylinder are fixedly connected with the two rectangular frames respectively, an installation rod is arranged in the second rectangular cylinder, four connecting rods are fixedly arranged at two ends of the installation rod and fixedly connected with the corresponding rectangular frames respectively, a plurality of first silencing boxes are fixedly arranged at the top and the bottom of the installation rod respectively, a plurality of second silencing boxes are fixedly arranged on the inner wall of the top and the bottom of the second rectangular cylinder respectively, and second silencing cotton is filled in the first silencing boxes and the second silencing boxes.

Preferably, a plurality of first silencing holes are formed in the second rectangular cylinder.

Preferably, the first muffling box and the second muffling box are both made of stainless steel plates, and a plurality of second muffling holes are formed in the inner walls of the first muffling box and the second muffling box.

Preferably, equal fixed mounting has the gag lever post on two rectangle frames, the spacing groove has all been seted up on the top of body and the bottom inner wall, gag lever post and corresponding spacing groove sliding connection.

Preferably, the rubber strip is in contact with a rectangular frame far away from the centrifugal ventilator, and the rubber strip is in contact with two connecting rods.

Preferably, the first silencing cotton and the second silencing cotton are both made of polyester fibers.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, the device enables the air flow blown out by the centrifugal ventilator to change direction continuously in the tube body through the matching of the tube body, the centrifugal ventilator, the first rectangular tube, the second rectangular tube, the first silencing cotton, the rectangular frame, the mounting rod, the connecting rod, the first silencing box, the second silencing box and the second silencing cotton, so that the retention time of the air flow in the tube body is longer, noise is absorbed by the first silencing cotton and the second silencing cotton for multiple times in the tube body, and the noise reduction effect is greatly improved; the silencing mechanism can be quickly taken out by matching the pipe body, the screw mounting frame, the stop lever, the rubber strip, the limiting rod and the limiting groove, so that the replacement and the maintenance are convenient, and the working efficiency is improved;

the utility model discloses the practicality is strong, can make the air current that comes out from centrifugal fan change direction many times in the muffler for the air current stops the time extension in the muffler, thereby makes the noise absorbed many times by sound absorbing material in the muffler, has improved noise cancelling effect, and this device can conveniently change and maintain canceling release mechanical system.

Drawings

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is a side view of the tube, the stop lever and the screw mounting frame of the present invention;

FIG. 3 is a side view of the rectangular frame, mounting rod and connecting rod of the present invention;

FIG. 4 is a side view of the first rectangular cylinder, the second rectangular cylinder and the first silencing cotton according to the present invention;

fig. 5 is an enlarged schematic view of a portion a of fig. 1.

In the figure: 1. a pipe body; 2. a screw mounting frame; 3. a stop lever; 4. a rubber strip; 5. a centrifugal fan; 6. a first rectangular cylinder; 7. a second rectangular cylinder; 8. first noise reduction cotton; 9. a rectangular frame; 10. mounting a rod; 11. a connecting rod; 12. a first whistle box; 13. a second whistle box; 14. second silencing cotton; 15. a limiting rod; 16. a limiting groove.

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. 1-5, the present invention provides a technical solution: a silencer for a centrifugal ventilator comprises a pipe body 1, two screw mounting frames 2, a stop lever 3, a rubber strip 4, a centrifugal ventilator 5 and a silencing mechanism, wherein the two screw mounting frames 2 are respectively welded on the outer walls of the two ends of the pipe body 1, the stop lever 3 and the centrifugal ventilator 5 are respectively fixedly connected with the two screw mounting frames 2 through bolts, the rubber strip 4 is fixedly connected with one side, close to the pipe body 1, of the stop lever 3, the silencing mechanism is installed in the pipe body 1 and comprises a first rectangular cylinder 6, a second rectangular cylinder 7 is arranged in the first rectangular cylinder 6, first silencing cotton 8 is filled between the first rectangular cylinder 6 and the second rectangular cylinder 7, the rectangular frames 9 are fixedly installed at the two ends of the first rectangular cylinder 6, the two ends of the second rectangular cylinder 7 are respectively fixedly connected with the two rectangular frames 9, an installation rod 10 is arranged in the second rectangular cylinder 7, four connecting rods 11 are fixedly installed at the two ends of the installation rod 10, the four connecting rods 11 are fixedly connected with the corresponding rectangular frames 9, a plurality of first silencing boxes 12 are fixedly arranged at the top and the bottom of the mounting rod 10, a plurality of second silencing boxes 13 are fixedly arranged on the inner walls of the top and the bottom of the second rectangular cylinder 7, and second silencing cotton 14 is filled in the first silencing boxes 12 and the second silencing boxes 13;

the second rectangular tube 7 is provided with a plurality of first silencing holes, the first silencing box 12 and the second silencing box 13 are both made of stainless steel plates, the inner walls of the first silencing box 12 and the second silencing box 13 are both provided with a plurality of second silencing holes, two rectangular frames 9 are both fixedly provided with limiting rods 15, the inner walls of the top and the bottom of the tube body 1 are both provided with limiting grooves 16, the limiting rods 15 are slidably connected with the corresponding limiting grooves 16, the rubber strip 4 is contacted with one rectangular frame 9 far away from the centrifugal ventilator 5, the rubber strip 4 is contacted with two connecting rods 11, the first silencing cotton 8 and the second silencing cotton 14 are both made of polyester fibers, firstly, the device is matched with the first rectangular tube 6, the second rectangular tube 7, the first silencing cotton 8, the rectangular frame 9, the mounting rod 10, the connecting rods 11, the first silencing box 12, the second silencing box 13 and the second silencing cotton 14 through the tube body 1, the centrifugal ventilator 5, the direction of the air flow blown out by the centrifugal ventilator 5 is changed continuously in the pipe body 1, so that the retention time of the air flow in the pipe body 1 is longer, and the noise is absorbed by the first silencing cotton 8 and the second silencing cotton 14 in the pipe body 1 for many times, thereby greatly improving the noise reduction effect; cooperate through body 1, screw installing frame 2, pin 3, rubber strip 4, gag lever post 15, spacing groove 16, can take out silencing mechanism fast, convenient change and maintenance improve work efficiency, the utility model discloses the practicality is strong, can make the air current that comes out from centrifugal fan 5 change direction many times in the muffler for the air current stops the time extension in the muffler, thereby makes the noise absorbed many times by sound absorbing material in the muffler, has improved noise cancelling effect, and this device can conveniently change and maintain silencing mechanism.

The working principle is as follows: the stop lever 3 compresses the silencing mechanism through the rubber strip, the right end of the limiting rod 15 is tightly attached to the limiting groove 16, and when the silencing mechanism needs to be replaced or maintained, the silencing mechanism can be pulled out only by detaching the bolt on the stop lever 3;

during the use, the air current gets into body 1 from centrifugal fan 5, and multiple times change direction in body 1, and the time that the air current stayed in body 1 is longer, finally flows by the left side export of body 1, and the noise constantly collides second rectangular cylinder 7, first noise reduction box 12 and second noise reduction box 13 in the transmission process in body 1, and the noise constantly is absorbed by first amortization cotton 8 and second amortization cotton 14, and the noise that finally goes out from body 1 left side export has been weakened greatly.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a muffler for centrifugal fan which characterized in that: the noise reduction pipe comprises a pipe body (1), two screw mounting frames (2), a stop lever (3), a rubber strip (4), a centrifugal fan (5) and a noise reduction mechanism, wherein the two screw mounting frames (2) are respectively welded on the outer walls of the two ends of the pipe body (1), the stop lever (3) and the centrifugal fan (5) are respectively fixedly connected with the two screw mounting frames (2) through bolts, the rubber strip (4) and one side, close to the pipe body (1), of the stop lever (3) are fixedly connected, and the noise reduction mechanism is mounted in the pipe body (1);

the silencing mechanism comprises a first rectangular cylinder (6), a second rectangular cylinder (7) is arranged in the first rectangular cylinder (6), first silencing cotton (8) is filled between the first rectangular cylinder (6) and the second rectangular cylinder (7), rectangular frames (9) are fixedly arranged at two ends of the first rectangular cylinder (6), two ends of the second rectangular cylinder (7) are fixedly connected with the two rectangular frames (9) respectively, a mounting rod (10) is arranged in the second rectangular cylinder (7), four connecting rods (11) are fixedly arranged at two ends of the mounting rod (10), the four connecting rods (11) are fixedly connected with the corresponding rectangular frames (9), a plurality of first silencing boxes (12) are fixedly arranged at the top and the bottom of the mounting rod (10), a plurality of second silencing boxes (13) are fixedly arranged on the inner walls of the top and the bottom of the second rectangular cylinder (7), the first sound-deadening box (12) and the second sound-deadening box (13) are filled with second sound-deadening cotton (14).

2. The silencer for the centrifugal fan according to claim 1, wherein: the second rectangular cylinder (7) is provided with a plurality of first silencing holes.

3. The silencer for the centrifugal fan according to claim 1, wherein: the first muffling box (12) and the second muffling box (13) are made of stainless steel plates, and a plurality of second muffling holes are formed in the inner walls of the first muffling box (12) and the second muffling box (13).

4. The silencer for the centrifugal fan according to claim 1, wherein: equal fixed mounting has gag lever post (15) on two rectangle frames (9), spacing groove (16) have all been seted up on the top of body (1) and the bottom inner wall, gag lever post (15) and corresponding spacing groove (16) sliding connection.

5. The silencer for the centrifugal fan according to claim 1, wherein: the rubber strip (4) is in contact with a rectangular frame (9) far away from the centrifugal ventilator (5), and the rubber strip (4) is in contact with two connecting rods (11).

6. The silencer for the centrifugal fan according to claim 1, wherein: the first silencing cotton (8) and the second silencing cotton (14) are both made of polyester fibers.

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