CN210984261U

CN210984261U - Boiler exhaust silencing device

Info

Publication number: CN210984261U
Application number: CN201921728140.5U
Authority: CN
Inventors: 朱锶湧
Original assignee: Shanghai Henke Hvac Equipment Co ltd
Current assignee: Shanghai Henke Hvac Equipment Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-07-10
Anticipated expiration: 2029-10-16

Abstract

The utility model discloses a boiler exhaust silencing device, including the boiler shell, from left to right be equipped with first acoustical board, mounting panel, second acoustical board, third acoustical board and fourth acoustical board in proper order in the boiler shell, the second acoustical board is installed in the mounting groove of mounting panel, first acoustical board is close to expansion plate is installed to one side of second acoustical board. Because the utility model discloses can eliminate the noise of frequency channel broad, make the utility model discloses the noise cancelling effect is good.

Description

Boiler exhaust silencing device

Technical Field

The utility model relates to an amortization technical field, concretely relates to boiler exhaust silencing device.

Background

Boiler exhaust muffler is also called boiler firing exhaust muffler, mainly used for to the boiler steam emission and other gaseous emission of industries such as electric power, petroleum, chemical industry, metallurgy, weaving when discharging, carry out the amortization, this is because the boiler can produce a large amount of high-pressure air currents when exhausting, these air currents can be compressed when passing through the less boiler of volume, so can produce a large amount of noises when the air current is discharged from the boiler, these noises not only can influence workman's hearing, cause the damage to the boiler, still produced the important noise reduction equipment that can eliminate steam emission dynamic noise-boiler exhaust muffler from this, boiler exhaust muffler on the present market is most can only eliminate the noise of fixed frequency channel, the noise elimination scope is little.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the main object of the present invention is to provide a boiler exhaust silencer with a wide silencing range and a good silencing effect.

The purpose of the utility model is realized with the following mode:

the utility model provides a boiler exhaust silencing device, includes the boiler shell, from left to right be equipped with first acoustical board, mounting panel, second acoustical board, third acoustical board and fourth acoustical board in proper order in the boiler shell, the second acoustical board is installed in the mounting groove of mounting panel, first acoustical board is close to expansion plate is installed to one side of second acoustical board.

Further, the boiler shell comprises a front end portion, a furnace body portion, a contraction portion, a connecting portion and a tail end portion which are sequentially connected, wherein the contraction portion is in a conical design, the diameter of the contraction portion is gradually reduced from left to right, and the diameter of the tail end portion is gradually increased from left to right and is still smaller than that of the furnace body portion.

Furthermore, the front end portion is provided with an air inlet, the first sound-absorbing plate, the mounting plate and the third sound-absorbing plate are located in the furnace body portion, the fourth sound-absorbing plate is located in the connecting portion, and the tail end portion is provided with an air outlet.

Furthermore, a plurality of first sound-absorbing holes are formed in the first sound-absorbing plate, a plurality of expansion blades are distributed on the expansion plate at intervals, and the expansion blades extend rightwards and towards the direction of the circle center far away from the expansion plate.

Furthermore, the number of the expansion leaves is three, and the included angle between every two adjacent expansion leaves is 120 degrees.

Further, the second acoustical panel includes two cotton layers of sound absorption and grid tray, the cotton layer of sound absorption sets up respectively the left and right sides of grid tray.

Furthermore, an accommodating cavity is arranged in the third sound-absorbing plate.

Furthermore, a plurality of second silencing holes are formed in the fourth silencing plate, the intervals of the second silencing holes are distributed unevenly, the second silencing holes are all arranged in an inclined mode in the axis direction of the fourth silencing plate, and the second silencing holes are all not parallel to each other.

The utility model has the advantages that:

1. the utility model discloses in be equipped with a plurality of acoustical boards, and the structure of every acoustical board is different, can effectively eliminate the noise of low frequency and well high frequency, the amortization scope is big and the noise cancelling effect is good.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a right side view of the first acoustical panel of the present invention.

The notation in the figure is: boiler shell 10, front end portion 11, air inlet 111, furnace body portion 12, constriction 13, connecting portion 14, tail end portion 15, exhaust port 151, first acoustical panel 20, first acoustical hole 21, expansion plate 22, expansion leaf 221, mounting panel 30, mounting groove 31, second acoustical panel 40, sound absorbing cotton layer 41, grid plate 42, third acoustical panel 50, accommodation chamber 51, fourth acoustical panel 60, second acoustical hole 61.

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 and 2, the boiler exhaust gas silencing apparatus shown in fig. 1 comprises a boiler shell 10, wherein a first silencing plate 20, a mounting plate 30, a second silencing plate 40, a third silencing plate 50 and a fourth silencing plate 60 are sequentially arranged in the boiler shell 10 from left to right, the second silencing plate 40 is mounted in a mounting groove 31 of the mounting plate 30, and an expansion plate 22 is mounted on one side of the first silencing plate 20, which is close to the second silencing plate 40.

The boiler shell 10 comprises a front end part 11, a furnace body part 12, a contraction part 13, a connecting part 14 and a tail end part 15 which are connected in sequence, wherein the contraction part 13 is in a conical design, the diameter of the contraction part 13 is gradually reduced from left to right, and the diameter of the tail end part 15 is gradually increased from left to right but is still smaller than the diameter of the furnace body part 12, so that gas cannot be compressed to generate noise again after heavy silencing.

Preferably, the front end portion 11 is provided with an air inlet 111, the first sound-absorbing plate 20, the mounting plate 30 and the third sound-absorbing plate 50 are all located in the boiler body portion 12, the fourth sound-absorbing plate 60 is located in the connecting portion 14, and the rear end portion 15 is provided with an air outlet 151 so that air enters the boiler casing 10 from the air inlet 111 and is exhausted from the air outlet 151 after being subjected to sound attenuation.

As shown in fig. 2, a plurality of first muffling holes 21 are formed in the first muffling plate 20, a plurality of expansion blades 221 are distributed at intervals on the expansion plate 22, and the expansion blades 221 extend rightward and in a direction away from the center of the expansion plate 22.

Preferably, the number of the expansion leaves 221 is three, the included angle between two adjacent expansion leaves 221 is 120 degrees, the first muffling hole 21 preliminarily muffles the gas, a part of the specific sound wave is difficult to pass through the first muffling hole 21 and be reflected back because the first muffling hole 21 has a fixed aperture, this portion of the sound waves that are difficult to pass through may collide back and forth between the front end portion 11 and the first sound-deadening plate 20, a part of energy is removed in the collision, and a part of the gas passing through the first muffling hole 21 collides with the expansion blade 221 to change the original moving path, or to the side wall of the furnace body 12 or to the first sound-absorbing plate 20, a portion of the medium-high frequency noise has been eliminated by the first sound-absorbing plate 20 and the expansion plate 22, the noise passing through the expansion plate 22 is now less than the noise just entering the air inlet 111.

Second acoustical panel 40 includes that two inhale cotton layer 41 and grid plate 42 of sound, inhale cotton layer 41 of sound and set up respectively the left and right sides of grid plate 42, inhale cotton layer 41 of sound and be the sound absorbing material and make, grid plate 42 is the grid plate, and the noise can drive inhale the cotton vibration of inhaling the sound in the cotton layer 41 of sound, the vibration can arouse the friction, can make acoustic energy convert into heat energy in the friction, after cotton layer 41 of sound is inhaled to gas process two-layer, in addition first acoustical panel 20 with expansion plate 22's effect, most middle and high frequency's noise has been eliminated, and because the grid structure of grid plate 42 can make partly gaseous its motion path of changing through partly gaseous, and partly low frequency noise can be eliminated in the collision.

Preferably, the third sound-absorbing plate 50 is provided with a receiving cavity 51, the noise of the gas passing through the second sound-absorbing plate 40 is much smaller than the noise just entering the air inlet 111, the first receiving cavity 51 allows a part of sound waves to pass through, and the other part of sound waves is consumed by collision under the action of reflection or refraction, so that after passing through a complicated channel and sound-absorbing materials, the medium-high frequency noise can be completely eliminated.

Preferably, the fourth muffling plate 60 is provided with a plurality of second muffling holes 61, the plurality of second muffling holes 61 are distributed at intervals in an uneven manner, the second muffling holes 61 are all obliquely arranged along the axis direction of the fourth muffling plate 60, the plurality of second muffling holes 61 are not parallel to each other, the second muffling holes 62 are obliquely arranged, so that the gas can collide with the hole walls of the second muffling holes 62 in the process of passing through the second muffling holes 62, and the second muffling holes are small holes, so that the sound waves can be continuously reflected or refracted to eliminate another part of low-frequency noise, and finally, the gas can be discharged from the gas outlet 151 with very low noise.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a boiler exhaust silencing device, includes boiler shell (10), its characterized in that, from left to right be equipped with first acoustical panel (20), mounting panel (30), second acoustical panel (40), third acoustical panel (50) and fourth acoustical panel (60) in proper order in boiler shell (10), second acoustical panel (40) are installed in mounting groove (31) of mounting panel (30), first acoustical panel (20) are close to expansion plate (22) are installed to one side of second acoustical panel (40).

2. Boiler exhaust gas silencing device according to claim 1, characterized in that the boiler shell (10) comprises a front end (11), a boiler body (12), a constriction (13), a connecting part (14) and a tail end (15) connected in sequence, the constriction (13) is of conical design and its diameter decreases gradually from left to right, the tail end (15) has a diameter that increases gradually from left to right but is still smaller than the diameter of the boiler body (12).

3. Boiler exhaust gas silencing arrangement according to claim 2, characterized in that the front end portion (11) is provided with an air inlet (111), the first (20), mounting plate (30) and the third (50) silencing plate are all located in the furnace body (12), the fourth silencing plate (60) is located in the connecting portion (14), and the rear end portion (15) is provided with an air outlet (151).

4. The boiler exhaust gas silencing device according to claim 1, wherein the first silencing plate (20) is provided with a plurality of first silencing holes (21), the expansion plate (22) is provided with a plurality of expansion blades (221) at intervals, and the expansion blades (221) extend rightwards and towards the direction away from the center of the circle of the expansion plate (22).

5. Boiler exhaust gas silencing apparatus according to claim 4, characterized in that the number of said expansion leaves (221) is three, and the angle between two adjacent expansion leaves (221) is 120 °.

6. Boiler exhaust gas silencing apparatus according to claim 1, characterized in that said second silencing plate (40) comprises two sound absorbing cotton layers (41) and grid plates (42), said sound absorbing cotton layers (41) being respectively disposed at left and right sides of said grid plates (42).

7. Boiler exhaust gas silencing device according to claim 1, characterized in that a receiving chamber (51) is provided in said third silencing plate (50).

8. The boiler exhaust gas silencing device according to claim 1, wherein a plurality of second silencing holes (61) are formed in the fourth silencing plate (60), the plurality of second silencing holes (61) are distributed at unequal intervals, the second silencing holes (61) are all arranged in an inclined manner along the axial direction of the fourth silencing plate (60), and the plurality of second silencing holes (61) are all not parallel to each other.