Noise reduction device for fly ash concentrator

Abstract

The noise reduction device comprises a base, the base is fixedly connected with a conical powder selecting chamber through four sets of supporting mechanisms, the upper end of the conical powder selecting chamber is fixedly connected with a cylindrical powder selecting chamber, and mineral wool sound insulation layers are arranged in the side wall of the conical powder selecting chamber and the side wall of the cylindrical powder selecting chamber. The lower end of the powder selecting chamber is fixedly connected with a coarse material outlet, and an air inlet mechanism is fixedly installed on the side edge of the conical powder selecting chamber. A feeding port is fixedly formed in the side wall of the outer portion of the cylindrical powder selecting chamber, a movable plate is rotatably connected to the upper end of the feeding port, a scattering mechanism and a separating mechanism are arranged in the cylindrical powder selecting chamber, a fine material collecting pipe is fixedly connected to the upper end of the cylindrical powder selecting chamber, and a fixing plate is fixedly connected to the upper end of the fine material collecting pipe. And the side wall of the fine material collecting pipe is fixedly connected with a powder discharging mechanism. The mineral wool sound insulation layer is arranged on the side wall of the powder selecting chamber, and the porous ceramic sound attenuation plate is arranged at the air inlet, so that noise generated by equipment can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of noise reduction devices, in particular to a noise reduction device used for a fly ash classifier. Background Art

[0002] Fly ash classifier is a kind of equipment for classifying fly ash, mainly used for classifying Class II fly ash. It can classify fly ash according to fineness, improve the quality and utilization rate of fly ash. According to different feeding methods, fly ash classifier can be divided into two types: mechanical ash feeding classifier and pneumatic ash feeding classifier.

[0003] When the fly ash classifier is running, the vibration of the classifier equipment itself, the rotation of the fan and the vibration of the equipment foundation cause huge noise. Long-term exposure to high noise environment may cause damage to the hearing and mental health of employees. Common noise reduction methods, such as installing a soundproof screen outside the classifier, can effectively reduce the noise transmitted outside the soundproof screen, but it is easy for the staff to observe the condition of the classifier and the noise cannot be confined to the classifier. Therefore, how to solve this problem is what we need to consider. Utility Model Content

[0004] The utility model aims to solve the problems in the background technology and proposes a noise reduction device for a fly ash classifier.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A noise reduction device for a fly ash powder selection machine, comprising a base, the base is fixedly connected to a conical powder selection chamber through four groups of supporting mechanisms, the upper end of the conical powder selection chamber is fixedly connected to a cylindrical powder selection chamber, mineral wool sound insulation layers are arranged in the side walls of the conical powder selection chamber and the cylindrical powder selection chamber, the lower end of the powder selection chamber is fixedly connected to a coarse material outlet, and an air inlet mechanism is fixedly installed on the side of the conical powder selection chamber;

[0007] A feed port is fixedly installed on the outer side wall of the cylindrical powder selection chamber, and a movable plate is rotatably connected to the upper end of the feed port. A spreading mechanism and a separation mechanism are arranged inside the cylindrical powder selection chamber. A fine material collecting pipe is fixedly connected to the upper end of the cylindrical powder selection chamber, and a fixed plate is fixedly connected to the upper end of the fine material collecting pipe, and a powder discharge mechanism is fixedly connected to the side wall of the fine material collecting pipe.

[0008] Preferably, the supporting mechanism comprises a supporting upright rod fixedly connected to the conical powder selection chamber, and the other end of the supporting upright rod is fixedly connected to the base via an elastic rubber pad.

[0009] Preferably, the air inlet mechanism includes an air inlet fixedly connected to the side wall of the conical powder selection chamber, a porous ceramic silencer plate is fixedly connected to the inner wall of the air inlet, a support frame is fixedly installed on the air inlet, and a negative pressure fan is fixedly connected to the support frame.

[0010] Preferably, the spreading mechanism includes a first rotating shaft which is rotatably connected to the top plate of the cylindrical powder selection chamber, a spreading plate is fixedly connected to the bottom end of the first rotating shaft, a first motor is fixedly connected to the top end of the first rotating shaft, a sound insulation cover is arranged outside the first motor, and the bottom of the sound insulation cover is in contact with the top of the cylindrical powder selection chamber.

[0011] Preferably, the separation mechanism includes a second rotating shaft fixedly connected to the fixed plate, a cage rotor fixedly connected to the bottom end of the second rotating shaft, a second motor fixedly connected to the top end of the second rotating shaft, a sound insulation cover is arranged outside the second motor, and the bottom of the sound insulation cover is in contact with the top of the fixed plate.

[0012] Preferably, the powder outlet mechanism comprises a narrow-mouth nozzle fixedly connected to the fine material collecting pipe, the narrow-mouth nozzle is fixedly connected to a fine powder outlet pipe, one end of the bottom of the fine powder outlet pipe is fixedly connected to a fine powder outlet, two groups of auxiliary columns are fixedly connected to the fine powder outlet pipe, and the auxiliary columns are fixedly connected to the base through auxiliary rubber pads.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By installing a mineral wool sound insulation layer on the side walls of the cylindrical powder selection chamber and the conical powder selection chamber, the vibration noise caused by the fly ash hitting the inner wall of the powder selection chamber can be effectively reduced, thereby reducing the noise at the source of the noise. At the same time, a porous ceramic silencer plate is installed on the inner wall of the air inlet to effectively reduce the noise generated by the negative pressure fan.

[0015] The vibration noise of the equipment on the base can be effectively reduced by setting elastic rubber pads and auxiliary rubber pads, and the noise of motor rotation can be reduced by setting a sound insulation cover on the motor.

[0016] In summary, the utility model reduces noise from four aspects: the operation of the equipment itself, the negative pressure fan, the vibration of the equipment to the base and the rotation of the motor. It reduces the noise emission more comprehensively, does not affect the staff's operation of the powder selection machine, and optimizes the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a left front structural schematic diagram of a noise reduction device for a fly ash classifier proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a powder selection chamber of a noise reduction device for a fly ash powder selection machine proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the right front view of a noise reduction device for a fly ash classifier proposed by the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0021] Figure 5 for Figure 4 Schematic diagram of the structure at point B in the middle.

[0022] In the figure: 1 base, 2 elastic rubber pad, 3 supporting pole, 4 conical powder selection chamber, 5 cylindrical powder selection chamber, 6 mineral wool sound insulation layer, 7 feed inlet, 8 movable plate, 9 air inlet, 10 first motor, 11 first rotating shaft, 12 scattering plate, 13 coarse material outlet, 14 fine material collecting pipe, 15 fixed plate, 16 second motor, 17 second rotating shaft, 18 cage rotor, 19 sound insulation cover, 20 narrow nozzle, 21 fine powder outlet pipe, 22 fine powder outlet, 23 auxiliary column, 24 auxiliary rubber pad, 25 porous ceramic silencer, 26 support frame, 27 negative pressure fan. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5 A noise reduction device for a fly ash classifier comprises a base 1, which is fixedly connected to a conical powder selection chamber 4 through four groups of supporting mechanisms. The supporting mechanism comprises a supporting upright rod 3 fixedly connected to the conical powder selection chamber 4, and the other end of the supporting upright rod 3 is fixedly connected to the base 1 through an elastic rubber pad 2. A cylindrical powder selection chamber 5 is fixedly connected to the upper end of the conical powder selection chamber 4, and mineral wool sound insulation layers 6 are arranged in the side walls of the conical powder selection chamber 4 and the cylindrical powder selection chamber 5. A coarse material outlet 13 is fixedly connected to the lower end of the powder selection chamber 4.

[0025] An air inlet mechanism is fixedly installed on the side of the conical powder selection chamber 4, and the air inlet mechanism includes an air inlet 9 fixedly connected to the side wall of the conical powder selection chamber 4, a porous ceramic silencer plate 25 is fixedly connected to the inner wall of the air inlet 9, a support frame 26 is fixedly installed on the air inlet 9, and a negative pressure fan 27 is fixedly connected to the support frame 26.

[0026] A feed port 7 is fixedly installed on the outer side wall of the cylindrical powder selection chamber 5, and a movable plate 8 is rotatably connected to the upper end of the feed port 7. A spreading mechanism and a separation mechanism are arranged inside the cylindrical powder selection chamber 5. The spreading mechanism includes a first rotating shaft 11 which is rotatably connected to the top plate of the cylindrical powder selection chamber 5, a spreading plate 12 is fixedly connected to the bottom end of the first rotating shaft 11, and a first motor 10 is fixedly connected to one end of the top of the first rotating shaft 11. A sound insulation cover 19 is arranged outside the first motor 10, and the bottom of the sound insulation cover 19 is in contact with the top of the cylindrical powder selection chamber 5.

[0027] The separation mechanism includes a second rotating shaft 17 fixedly connected to the fixed plate 15, a cage rotor 18 fixedly connected to the bottom end of the second rotating shaft 17, a second motor 16 fixedly connected to the top end of the second rotating shaft 17, a sound insulation cover 19 is arranged outside the second motor 16, and the bottom of the sound insulation cover 19 is in contact with the top of the fixed plate 15.

[0028] A fine material collecting pipe 14 is fixedly connected to the upper end of the cylindrical powder selection chamber 5, a fixed plate 15 is fixedly connected to the upper end of the fine material collecting pipe 14, a powder discharging mechanism is fixedly connected to the side wall of the fine material collecting pipe 14, the powder discharging mechanism comprises a narrow-mouth nozzle 20 fixedly connected to the fine material collecting pipe 14, the narrow-mouth nozzle 20 is fixedly connected to a fine powder outlet pipe 21, a fine powder outlet 22 is fixedly connected to one end of the bottom of the fine powder outlet pipe 21, two sets of auxiliary columns 23 are fixedly connected to the fine powder outlet pipe 21, and the auxiliary columns 23 are fixedly connected to the base 1 through auxiliary rubber pads 24.

[0029] When the utility model is in use, the staff runs the fly ash classifier, pours the fly ash raw material into the scattering plate 12 from the feed port 7, starts the first motor 10 to drive the first rotating shaft 11 to rotate, the first rotating shaft 11 drives the scattering plate 12 to rotate, the raw material is scattered in the powder selection chamber, starts the negative pressure fan 27 to guide air to enter, and reduces the noise generated by the negative pressure fan 27 by the porous ceramic silencer plate 25, starts the second motor 16 to drive the second rotating shaft 17 to rotate, the second rotating shaft 17 drives the cage rotor 18 to rotate, and the generated eddy current drives the raw material to rotate in the powder selection chamber, and the noise generated by the raw material hitting the side wall of the powder selection chamber is blocked by the mineral wool sound insulation layer 6, and at the same time, the sound insulation cover 19 on the first motor 10 and the second motor 16 reduces the noise of the motor, and the vibration of the equipment to the base 1 is reduced by setting the elastic rubber pad 2, thereby reducing the noise.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A noise reduction device for a fly ash classifier, comprising a base (1), characterized in that: The base (1) is fixedly connected to a conical powder selection chamber (4) via four groups of supporting mechanisms; the upper end of the conical powder selection chamber (4) is fixedly connected to a cylindrical powder selection chamber (5); mineral wool sound insulation layers (6) are provided in the side walls of the conical powder selection chamber (4) and the cylindrical powder selection chamber (5); the lower end of the conical powder selection chamber (4) is fixedly connected to a coarse material outlet (13); and an air inlet mechanism is fixedly installed on the side of the conical powder selection chamber (4); A feed port (7) is fixedly mounted on the outer side wall of the cylindrical powder selection chamber (5); a movable plate (8) is rotatably connected to the upper end of the feed port (7); a material spreading mechanism and a separation mechanism are arranged inside the cylindrical powder selection chamber (5); a fine material collection pipe (14) is fixedly connected to the upper end of the cylindrical powder selection chamber (5); a fixed plate (15) is fixedly connected to the upper end of the fine material collection pipe (14); and a powder discharge mechanism is fixedly connected to the side wall of the fine material collection pipe (14).

2. A noise reduction device for a fly ash classifier according to claim 1, characterized in that: The support mechanism comprises a support upright rod (3) fixedly connected to the conical powder selection chamber (4); the other end of the support upright rod (3) is fixedly connected to the base (1) via an elastic rubber pad (2).

3. The noise reduction device for a fly ash classifier according to claim 1, characterized in that: The air inlet mechanism comprises an air inlet (9) fixedly connected to the side wall of the conical powder selection chamber (4), a porous ceramic muffler plate (25) fixedly connected to the inner wall of the air inlet (9), a support frame (26) fixedly mounted on the air inlet (9), and a negative pressure fan (27) fixedly connected to the support frame (26).

4. The noise reduction device for a fly ash classifier according to claim 1, characterized in that: The material spreading mechanism comprises a first rotating shaft (11) which is rotatably connected to a top plate of a cylindrical powder selection chamber (5); a material spreading plate (12) is fixedly connected to the bottom end of the first rotating shaft (11); a first motor (10) is fixedly connected to one end of the top of the first rotating shaft (11); a soundproof cover (19) is arranged outside the first motor (10); and the bottom of the soundproof cover (19) is in contact with the top of the cylindrical powder selection chamber (5).

5. The noise reduction device for a fly ash classifier according to claim 1, characterized in that: The separation mechanism comprises a second rotating shaft (17) fixedly connected to the fixed plate (15), a cage rotor (18) fixedly connected to the bottom end of the second rotating shaft (17), a second motor (16) fixedly connected to the top end of the second rotating shaft (17), a soundproof cover (19) provided outside the second motor (16), and a bottom of the soundproof cover (19) in contact with the top of the fixed plate (15).

6. The noise reduction device for a fly ash classifier according to claim 1, characterized in that: The powder discharge mechanism comprises a narrow-mouth nozzle (20) fixedly connected to the fine material collection pipe (14), the narrow-mouth nozzle (20) being fixedly connected to a fine powder discharge pipe (21), one end of the bottom of the fine powder discharge pipe (21) being fixedly connected to a fine powder outlet (22), two groups of auxiliary columns (23) being fixedly connected to the fine powder discharge pipe (21), and the auxiliary columns (23) being fixedly connected to the base (1) via auxiliary rubber pads (24).

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