CN213452342U

CN213452342U - Emptying silencer

Info

Publication number: CN213452342U
Application number: CN202021965440.8U
Authority: CN
Inventors: 丁仁伟; 步建栋; 周敏杰
Original assignee: Wuxi Nanda Special Petrochemical Equipment Accessories Co ltd
Current assignee: Wuxi Nanda Special Petrochemical Equipment Accessories Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-06-15
Anticipated expiration: 2030-09-09

Abstract

The application relates to an emptying silencer, which comprises a silencer barrel, wherein the silencer barrel is provided with an air inlet, a plurality of silencing pipes are arranged in the silencer barrel, and sealing plates are arranged at the tops of the silencing pipes; a plurality of hush pipe sets gradually from inside to outside, each hush pipe all is equipped with a plurality of hush holes. The utility model provides an emptying silencer has good noise cancelling effect through multistage amortization.

Description

Emptying silencer

Technical Field

The application relates to the technical field of silencers, in particular to a vent silencer.

Background

The emptying silencer is used for inhibiting noise generated during emptying and exhausting of a pipeline, and is widely applied to petroleum, chemical engineering, light industry, electric power, environmental protection engineering and the like.

The prior art discloses an emptying silencer, which comprises a silencing barrel and a silencing pipe, wherein the silencing pipe is positioned in the silencing barrel; the silencing pipe is provided with a plurality of small holes; the upper end of the silencing pipe is provided with an upper end enclosure, and the lower end of the silencing pipe is provided with a lower end enclosure; the airflow passes through the small holes of the silencing pipe, the frequency of the noise changes, and the audible sound component is reduced.

With respect to the related art in the above, the inventors consider that: with the increasing requirements of factories on noise control, the noise reduction effect of a single-stage noise reduction structure is difficult to meet the requirements of noise control.

SUMMERY OF THE UTILITY MODEL

In order to improve the noise cancelling effect of unloading muffler, this application provides the unloading muffler.

The application provides a blowdown muffler adopts following technical scheme:

the emptying silencer comprises a silencer barrel, wherein a plurality of silencing pipes are arranged in the silencer barrel, the silencer barrel is provided with an air inlet, and one ends of the silencing pipes, which are far away from the air inlet, are provided with sealing plates; a plurality of hush pipe sets gradually from inside to outside, each hush pipe all is equipped with a plurality of hush holes.

Through adopting foretell technical scheme, be equipped with a plurality of hush pipes in the muffler barrel, when the bloated exhalant gas passed through the hush hole of a plurality of hush pipes, the air current velocity of flow reduces gradually, and pressure reduces gradually, and the noise frequency spectrum of air current can be to high frequency or hyperfrequency conversion, makes the audible sound composition in the air current obviously reduce to improve the noise cancelling effect of unloading muffler, the noise abatement is to the interference and the injury of people.

Optionally, the number of the silencing tubes is three, and the three silencing tubes are a first-stage silencing tube, a second-stage silencing tube and a third-stage silencing tube from inside to outside in sequence; the silencing holes of the second-stage silencing tubes are located on the upper portions of the second-stage silencing tubes, and the silencing holes of the third-stage sound absorbing tubes are located on the lower portions of the third-stage sound absorbing tubes.

By adopting the technical scheme, the discharge path of the air flow in the silencer cylinder can be prolonged under the condition that the volume of the silencer cylinder is kept unchanged; the longer the path taken by the airflow, the more acoustic energy the airflow dissipates by rubbing against the walls of the duct, reducing the noise of the airflow.

Optionally, the silencing holes are uniformly distributed on the pipe wall of the silencing pipe; and acoustic boards are arranged between the adjacent acoustic boards, and all the acoustic boards are arranged in a staggered manner along the axial direction of the silencer cylinder body.

By adopting the technical scheme, the arrangement of the sound-absorbing plate also has the function of prolonging the air flow discharge path in the silencer cylinder; the airflow is blocked by the sound-absorbing board in the process of being upwards discharged out of the cylinder body of the silencer, the transmission direction of the airflow is changed, and more energy is consumed; the airflows in different directions are collected in the same area, and the airflows are mutually interfered, so that the noise frequency of the airflow can be changed, and the effect of reducing noise is achieved.

Optionally, the number of the silencing tubes is three, and the three silencing tubes are a first-stage silencing tube, a second-stage silencing tube and a third-stage silencing tube from inside to outside in sequence; the sound-absorbing plate between the secondary sound-absorbing pipe and the tertiary sound-absorbing pipe is an enhanced sound-absorbing plate, and the enhanced sound-absorbing plate is connected to one side of the outer wall of the secondary sound-absorbing pipe; one side that reinforcing abatvoix is close to the second grade muffler pipe is equipped with towards the sunken sound groove of inhaling of tertiary muffler pipe direction, inhale sound groove and a plurality of bloop intercommunication.

Through adopting foretell technical scheme, the sound absorption groove on the reinforcing abatvoix can make the air current make a round trip to reflect in inhaling the sound groove, consumes a large amount of sound energy, and then makes the noise reduction of air current.

Optionally, the width of the sound absorption groove along the axial direction of the sound absorption barrel is gradually reduced from the side close to the second-stage sound absorption pipe to the side close to the third-stage sound absorption pipe.

By adopting the technical scheme, the inclined sound absorption groove can increase the reflection times of the air flow in the sound absorption groove, so that the energy consumed by the air flow is more, and the noise of the air flow is further reduced.

Optionally, the total opening area of the muffling hole on each muffling pipe is not smaller than the area of the air inlet.

By adopting the technical scheme, the total area of the silencing holes on each silencing pipe is not less than the area of the air inlet when the air flow passes through each silencing pipe to change the noise frequency and the pressure of the air flow.

Optionally, the inner wall of the silencer cylinder is provided with a resistive sound absorbing layer.

By adopting the technical scheme, the resistive sound absorbing layer on the inner wall of the silencer cylinder body can play a role in auxiliary silencing; the resistive material on the resistive sound absorbing layer is generally provided with small holes, and part of air flow rubs in the small holes of the resistive material, so that sound energy is converted into heat energy to be consumed, and further the noise of the air flow passing through the silencer is weakened.

Optionally, the sealing plate is a tapered plate, and a diameter of the sealing plate close to one side of the inlet is smaller than a diameter of the sealing plate close to the other side of the inlet.

By adopting the technical scheme, when the air flow enters the silencer cylinder, the air flow can be reflected at the sealing plate, partial sound energy is consumed, and the noise of the air flow is reduced.

Optionally, a waterproof cover is arranged at the upper end of the silencer cylinder body, and a connecting flange is arranged at the bottom of the silencer cylinder body; the side wall of the silencer cylinder body is provided with a lifting lug.

By adopting the technical scheme, the waterproof cover can reduce the situation that rainwater enters the barrel body of the silencer and blocks the silencing hole in rainy days; the connecting flange is convenient for hermetically connecting the emptying silencer with the pipeline; the lifting lug is convenient for lift the emptying silencer and the installation of the emptying silencer.

In summary, the present application includes at least one of the following benefits:

1. the arrangement of the plurality of silencing pipes improves the silencing effect of the emptying silencer and reduces the interference and damage of noise to people;

2. the silencing holes of the second-stage silencing pipes are arranged at the upper parts of the second-stage silencing pipes, and the silencing holes of the third-stage sound absorbing pipes are arranged at the lower parts of the third-stage sound absorbing pipes, so that the sound energy consumed by friction between airflow and pipe walls is increased, and the noise of the airflow is weakened;

3. through set up the sound groove of inhaling on reinforcing abatvoix, gaseous in inhaling the sound inslot reflection, the energy dissipation is enough to consume the acoustic energy, and then improves the noise cancelling effect of unloading muffler.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a sectional view taken along the line A-A in FIG. 1, which mainly shows the internal structure of the muffler shell in embodiment 1 of the present application;

fig. 3 is a sectional view of a muffler cylinder in embodiment 2 of the present application.

Description of reference numerals: 1. a muffler cylinder; 2. a sound-deadening tube; 21. a first-stage silencer pipe; 22. a secondary muffler pipe; 23. a third-stage silencing pipe; 3. closing the plate; 5. a silencing hole; 6. a sound-absorbing panel; 61. reinforcing the acoustic panel; 62. a sound absorbing groove; 7. a resistive sound absorbing layer; 8. lifting lugs; 9. a waterproof cover; 10. a drain pipe; 11. an upper cylinder body; 12. a lower cylinder body; 13. a connecting flange; 14. an exhaust port; 15. an air inlet.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Referring to fig. 1, the embodiment of the application discloses an emptying silencer, which comprises a silencer barrel body 1, wherein an air inlet 15 is arranged in the silencer barrel body 1, a plurality of silencing pipes 2 are arranged in the silencer barrel body 1, and sealing plates 3 are arranged at the tops of the silencing pipes 2; a plurality of hush pipe 2 sets gradually from inside to outside, and each hush pipe 2 all is equipped with a plurality of hush holes 5.

Example 1

Referring to fig. 2, three silencing tubes 2 are arranged, and the three silencing tubes 2 are a first-stage silencing tube 21, a second-stage silencing tube 22 and a third-stage silencing tube 23 from inside to outside; the sealing plate 3 on each silencing tube 2 is a conical plate, the diameter of one side of the sealing plate 3 close to the air inlet 15 is smaller than that of the other side, namely, the section of the sealing plate 3 along the axial direction of the silencer cylinder body 1 is V-shaped.

Referring to fig. 1 and 2, an exhaust port 14 is arranged at the upper end of a silencer cylinder body 1 of the emptying silencer; the primary silencing pipe 21 penetrates through the silencer cylinder body 1, and the air inlet 15 of the silencer cylinder body 1 is communicated with the primary silencing pipe 21; the bottom of the first-stage silencing pipe 21 is provided with a connecting flange 13 for connecting an exhaust pipeline; the side wall of the silencer cylinder body 1 is provided with four lifting lugs 8 for lifting and emptying the silencer; the waterproof cover 9 is installed on the upper portion of the barrel cover, and the condition that rainwater enters the silencer barrel body 1 from the air outlet to cause water accumulation and blockage of the silencing holes 5 is reduced.

Referring to fig. 2, the silencer cylinder 1 comprises an upper cylinder 11 and a lower cylinder 12, wherein the upper cylinder 11 and the lower cylinder 12 are welded together, so that the manufacturing of the emptying silencer and the installation of each structure in the cylinder are facilitated; the inner wall of the silencer cylinder body 1 is bonded with a resistive sound absorbing layer 7 for assisting the silencer to muffle sound; the bottom of the lower cylinder 12 is provided with a drain pipe 10 for discharging moisture from the air flow deposited in the silencer.

The silencing holes 5 of the first-stage silencing tubes 21 are uniformly distributed on the tube walls of the first-stage silencing tubes 21, the silencing holes 5 of the second-stage silencing tubes 22 are positioned on the upper portions of the second-stage silencing tubes 22, and the silencing holes 5 of the third-stage silencing tubes are positioned on the lower portions of the third-stage silencing tubes.

The total opening area of the silencing holes 5 of the first-stage silencing pipe 21, the total opening area of the silencing holes 5 of the second-stage silencing pipe 22 and the total opening area of the silencing holes 5 of the third-stage silencing pipe 23 are not smaller than the area of the air inlet 15.

The implementation principle of the embodiment 1 is as follows:

referring to fig. 2, the primary muffler pipe 21 adopts the working principle of a small-hole muffler; the total area of the silencing holes 5 is kept to be not smaller than the total area of the air inlet 15, the air flow enters the first-stage silencing pipe 21 from the air inlet 15 of the silencer cylinder body 1, and when the air flow enters the second-stage silencing pipe 22 through the silencing holes 5 of the first-stage silencing pipe 21, the noise frequency of the air flow is converted to high frequency or ultrahigh frequency, so that audible sound components in frequency spectrum are obviously reduced, and noise is reduced; the air current enters the second-stage silencing pipe 22, passes through the silencing hole 5 at the upper part of the second-stage silencing pipe 22 and the silencing hole 5 at the lower part of the third-stage silencing pipe 23, and is finally discharged through the exhaust port 14, so that in the silencer barrel 1 with limited volume, the discharge path of the air current is prolonged, the sound energy consumed by friction between the air current and the pipe wall when the air current flows is increased, and a good silencing effect is achieved.

Example 2

The present embodiment discloses a flare muffler.

Referring to FIG. 3, the flare muffler disclosed in this example differs from example 1 in that:

the silencing holes 5 are uniformly distributed on the pipe wall of the silencing pipe 2; and sound-absorbing plates 6 are arranged between the adjacent silencing tubes 2, and all the sound-absorbing plates 6 are arranged in a staggered manner along the axial direction of the cylinder body.

The sound-absorbing plate 6 between the secondary sound-absorbing pipe 22 and the tertiary sound-absorbing pipe 23 is an enhanced sound-absorbing plate 61, and the enhanced sound-absorbing plate 61 is connected to one side of the outer wall of the secondary sound-absorbing pipe 22; one side of the enhanced sound-absorbing plate 61 close to the secondary sound-absorbing pipe 22 is provided with a sound-absorbing groove 62 which is sunken towards the direction of the tertiary sound-absorbing pipe 23, and the width of the sound-absorbing groove 62 along the axial direction of the silencer cylinder body 1 is gradually reduced from one side close to the secondary sound-absorbing pipe 22 to one side close to the tertiary sound-absorbing pipe 23; the sound absorbing grooves 62 communicate with the plurality of muffling holes 5.

The implementation principle of the embodiment 2 is as follows:

when air flow enters the primary silencing pipe 21 from the air inlet 15 of the silencer cylinder body 1 and enters the secondary silencing pipe 22 through the silencing hole 5 of the primary silencing pipe 21, the air flow is blocked by the sound-absorbing plate 6 in the motion process, so that the motion direction of the air flow is changed, and energy is consumed; when the air current passes through the sound absorption groove 62 between the second-stage silencing pipe 22 and the third-stage silencing pipe 23, the air current can be reflected back and forth in the sound absorption groove 62, and finally is discharged through the silencing hole 5 at the lower part of the second-stage silencing pipe 22 and the silencing hole 5 at the lower part of the third-stage silencing pipe 23 and the exhaust port 14, so that the discharge path of the air current in the silencer cylinder body 1 is prolonged as much as possible, and the silencing effect of the emptying silencer is obviously improved.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The emptying silencer comprises a silencer cylinder body (1), and is characterized in that: the silencer cylinder body (1) is provided with an air inlet (15), a plurality of silencing pipes (2) are arranged in the silencer cylinder body (1), and a sealing plate (3) is arranged at one end, far away from the air inlet (15), of each silencing pipe (2); a plurality of hush pipe (2) set gradually from inside to outside, each hush pipe (2) all is equipped with a plurality of hush holes (5).

2. The emptying muffler of claim 1, wherein: the number of the silencing tubes (2) is three, and the three silencing tubes (2) are a primary silencing tube (21), a secondary silencing tube (22) and a tertiary silencing tube (23) from inside to outside in sequence; the silencing holes (5) of the secondary silencing pipes (22) are located in the upper portions of the secondary silencing pipes (22), and the silencing holes (5) of the tertiary silencing pipes (23) are located in the lower portions of the tertiary silencing pipes (23).

3. The emptying muffler of claim 1, wherein: the silencing holes (5) are uniformly distributed on the pipe wall of the silencing pipe (2); and sound-absorbing plates (6) are arranged between the adjacent silencing pipes (2), and all the sound-absorbing plates (6) are arranged in a staggered manner along the axial direction of the silencer cylinder body (1).

4. The emptying muffler of claim 3, wherein: the number of the silencing tubes (2) is three, and the three silencing tubes (2) are a primary silencing tube (21), a secondary silencing tube (22) and a tertiary silencing tube (23) from inside to outside in sequence; the sound-absorbing plate (6) between the secondary sound-absorbing pipe (22) and the tertiary sound-absorbing pipe (23) is an enhanced sound-absorbing plate (61), and the enhanced sound-absorbing plate (61) is connected to one side of the outer wall of the secondary sound-absorbing pipe (22); one side of the enhanced sound absorption plate (61) close to the second-stage silencing pipe (22) is provided with a sound absorption groove (62) which is sunken towards the direction of the third-stage silencing pipe (23), and the sound absorption groove (62) is communicated with the silencing holes (5).

5. The emptying muffler of claim 4, wherein: the width of the sound absorption groove (62) along the axial direction of the silencer cylinder body (1) is gradually reduced from one side close to the second-stage silencing pipe (22) to one side close to the third-stage silencing pipe (23).

6. The emptying muffler of claim 1, wherein: the total opening area of the muffling holes (5) on each muffling pipe (2) is not smaller than the area of the air inlet (15).

7. The emptying muffler of claim 1, wherein: the inner wall of the silencer cylinder body (1) is provided with a resistive sound absorbing layer (7).

8. The emptying muffler of claim 1, wherein: the shrouding (3) are the toper board, shrouding (3) are close to the diameter that air inlet (15) one side is less than the diameter of opposite side.

9. The emptying muffler of claim 1, wherein: the upper end of the silencer cylinder body (1) is provided with a waterproof cover (9), and the bottom of the silencer cylinder body (1) is provided with a connecting flange (13); the side wall of the silencer cylinder body (1) is provided with a lifting lug (8).