CN209557878U - A kind of natural gas vent sound deadener - Google Patents
A kind of natural gas vent sound deadener Download PDFInfo
- Publication number
- CN209557878U CN209557878U CN201920281818.3U CN201920281818U CN209557878U CN 209557878 U CN209557878 U CN 209557878U CN 201920281818 U CN201920281818 U CN 201920281818U CN 209557878 U CN209557878 U CN 209557878U
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- China
- Prior art keywords
- pipe
- chamber
- natural gas
- expansion chambers
- gas vent
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Abstract
The utility model relates to a kind of natural gas vent sound deadeners, including air inlet main pipe, air intake branch a, air intake branch b, air intake branch c, expansion chambers a, expansion chambers b, expansion chambers c, exhaust branch pipe a, exhaust branch pipe b, exhaust branch pipe c, exhaust main pipe and quincunx spout.Expansion chambers a includes interpolation pipe one, interpolation pipe two, interpolation pipe three, perforated pipe one, perforated pipe two and partition, perforated pipe one connects interpolation pipe one and interpolation pipe two, perforated pipe two connects interpolation pipe two and interpolation pipe three, is separated by partition to form chamber one, chamber two in expansion chambers a.Expansion chambers b, expansion chambers c are identical with expansion chambers a structure.The utility model has many advantages, such as that structure is simple, sound deadening capacity is big, frequency of noise elimination range is wide, installation is simple.Noise control is vented suitable for natural gas line.
Description
Technical field
The utility model belongs to natural gas vent noise noise reduction technology field, and in particular to a kind of natural gas vent noise disappears
Sound device.
Background technique
Oil gas pipe network is the main foundation facility for ensureing oil gas supply, is the important branch for realizing energy production and consumption revolution
Support.Occur to need to carry out high-pressure natural gas when accident or pipeline section need and tie up and the special circumstances such as repair, relocate to put when there is yard
Sky, however the noise that the directly emptying of high-pressure natural gas generates is strongly, when high-pressure natural gas is vented, instantaneous velocity is close to sound
The noise of speed, generation can be up to 95dB~110dB.Few then 1-2 hours of each natural gas vent operation duration, more then 6-8 are small
When.It is exposed in natural gas vent noise circumstance for a long time in this way, has on the one hand seriously affected the body of employee and related personnel
On the other hand health also brings serious health hazard, economic loss to the public on emptying standpipe periphery, or even causes society
It can contradiction.
Silencer be it is a kind of not only air-flow was allowed to pass through, but also can effectively prevent or device that decrease sound can be propagated outward,
It is generally used for control air power noise, is mainly installed on the pipeline that inlet and outlet mouth or air-flow pass through.According to noise-cancelling theory and
The difference of structure can be divided into three classes: dissipative muffler, reactive muffler, impedance composite muffler, and silencer can be effective
The acoustic impedance for changing airflow channel achievees the purpose that reduce noise.
Summary of the invention
The utility model mainly solves the deficiencies in the prior art, provides that a kind of structure is simple, sound deadening capacity is big, eliminates the noise
Wide frequency range, the simple silencer of installation, it is intended to reduce natural gas vent noise.
To achieve the goals above, the utility model is achieved through the following technical solutions: a kind of natural gas vent noise disappears
Sound device, including air inlet main pipe, air intake branch a, air intake branch b, air intake branch c, expansion chambers a, expansion chambers b, expansion chambers c, exhaust
Branch pipe a, exhaust branch pipe b, exhaust branch pipe c, exhaust main pipe and quincunx spout.Expansion chambers a include interpolation pipe one, interpolation pipe two,
Interpolation pipe three, perforated pipe one, perforated pipe two and partition are separated by partition to form chamber one, chamber two in expansion chambers a.Expansion
Room b, expansion chambers c are identical with expansion chambers a structure.
The air inlet main pipe and emptying standpipe use flange or welded connecting, cylinder on the diameter and emptying standpipe of air inlet main pipe
Body diameter is equal.The chamber one can eliminate the noise of first noise peak frequency of natural gas vent generation.
The chamber two can eliminate the noise of second noise peak frequency of natural gas vent generation.
The interpolation pipe one is inserted into chamber one, and the length that one intracavitary section of interpolation pipe is the 1/2 of one length of chamber, can be disappeared
Except the odd-multiple that the wavelength that natural gas vent generates is 2 times of one length of chamber passes through frequency.
The interpolation pipe two is inserted into partition, and partition divides interpolation pipe two for two parts, and first part is located at chamber one
Interior, the length of first part is the 1/4 of one length of chamber, and the wavelength that can eliminate natural gas vent generation is that 2 times of chambers one are long
By frequency, second part is located in chamber two even-multiple of degree, and the length of second part is the 1/2 of two length of chamber, can be with
It eliminates the odd-multiple that the wavelength that natural gas vent generates is 2 times of two length of chamber and passes through frequency.
The interpolation pipe three is inserted into chamber two, and the length that three intracavitary sections of interpolation pipe is the 1/4 of two length of chamber, can be disappeared
Except the even-multiple that the wavelength that natural gas vent generates is 2 times of two length of chamber passes through frequency.
The perforated pipe one connects interpolation pipe one and interpolation pipe two, and perforated pipe two is by interpolation pipe two and interpolation pipe three
It connects, perforated pipe one, perforated pipe two are that aperture is distributed on wall surface is 3~10mm eyelet and punching rate wearing greater than 30%
Kong Guan, perforated pipe can reduce drag losses of the natural gas by silencer, improve the aerodynamic quality of silencer.
The air inlet main pipe is connect with air intake branch a, air intake branch b, air intake branch c, by the big channel segmentation of air inlet main pipe
At three small subchannels of air intake branch, the divergence ratio of expansion chambers can be increased, the lower-cut-off frequency of expansion chambers can also be reduced,
Realization has biggish sound deadening capacity within the scope of wider frequency of noise elimination.
The quincunx spout and exhaust main pipe are using welded connecting, quincunx spout and single circular spout, Round Porous
Shape spout, which is compared, has more good noise reduction effect expansion chambers diameter of section calculation method:
Noise reduction effect reaches maximum, the length calculation method of the two chambers of expansion chambers:
D in formula --- expansion chambers diameter of section, m
C --- the velocity of sound, m/s
fOn--- the upper cut-off frequency of expansion chambers effectively eliminated the noise, Hz
f1--- first noise peak frequency that natural gas vent generates, Hz
f2--- second noise peak frequency that natural gas vent generates, Hz
l1--- the length of chamber one, m
l2--- the length of chamber two, m
According to theory analysis it is found that f can be eliminated when intubating length is equal to the interpolation pipe of l/2minN is surprise in=nc/2l
Pass through frequency when number.When intubating length is equal to the interpolation pipe of l/4, f can be eliminatedminPassing through when n is even number in=nc/2l
Frequency.The sound wave propagated forward is equal with both reflected 180 ° of acoustic phase difference of sections amplitudes are encountered, opposite in phase,
It interferes.The sound wave of multi-frequency can thus be eliminated.
According to the length of the above theoretical calculation interpolation pipe, the interpolation pipe length calculation method of two chambers:
The good effect that the utility model has: the utility model structure is simple, light-weight, easy for installation, noise reduction effect
Obviously, and without using any deadener using the mutation of pipeline section make the sound wave of certain frequencies along pipe transmmision, In
Reflection, interference phenomenon occur for the interface of mutation, to reduce the sound energy from silencer to external radiation, reach noise elimination noise reduction effect
Fruit.This silencer be suitable for natural gas line emptying generate low-frequency noise, and by by the big channel segmentation of air inlet main pipe at
Three small subchannels of air intake branch, realization have biggish sound deadening capacity within the scope of wider frequency of noise elimination.This silencing end uses
Quincunx spout enhances silencer noise reduction effect.Interpolation pipe is connected by perforated pipe inside this silencer, can be improved
The aerodynamic quality of silencer.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Description of symbols in figure: 1. air inlet main pipes；21. air intake branch a；22. air intake branch b；23. air intake branch c；31. expanding
Open room a；32. expansion chambers b；33. expansion chambers c；41. exhaust branch pipe a；42. exhaust branch pipe b；43. exhaust branch pipe c；5. exhaust is dry
Pipe；6. quincunx spout.
Fig. 2 is the structural schematic diagram of expansion chambers a used in the utility model.
Description of symbols in figure: 7. interpolation pipes one；8. chamber one；9. perforated pipe one；10. interpolation pipe two；11. partition；12. chamber
Room two；13. perforated pipe two；14. interpolation pipe three.
Specific embodiment
The specific implementation of the utility model is further described with reference to the accompanying drawing:
As shown in Fig. 1~2, a kind of natural gas vent sound deadener, it include air inlet main pipe 1, air intake branch a21, into
Gas branch pipe b22, air intake branch c23, expansion chambers a31, expansion chambers b32, expansion chambers c33, exhaust branch pipe a41, exhaust branch pipe b42,
Exhaust branch pipe c43, exhaust main pipe 5, quincunx spout 6.Chamber 1, chamber two are separated to form by partition 11 in expansion chambers a31
12, it includes interpolation pipe 1, interpolation pipe 2 10, interpolation pipe 3 14, perforated pipe 1, perforated pipe 2 13 and partition 11.Expansion chambers
B32, expansion chambers c33 are identical with the structure of expansion chambers a31.
The principle of noise reduction of the utility model: a kind of natural gas vent sound deadener is mounted on the outlet of emptying standpipe upper shell
End, first is that the unexpected expansion using silencer pipeline section causes sound wave to reflect at the abrupt change of cross-section, by most of sound wave
It is reflected back to Sounnd source direction, or roundtrip is until disappearing in chamber；Second is that using certain in expansion chambers and expansion chambers
The interpolation pipe of length makes the sound wave of the sound wave propagated forward interface reflection different with interpolation pipe is encountered differ one 180 ° of phase
Position keeps the two amplitude equal, and opposite in phase interferes with each other, to reach noise reduction effect.Silencer divides the big channel of air inlet main pipe
Three small subchannels of air intake branch are cut into, realization has biggish sound deadening capacity within the scope of wider frequency of noise elimination；Silencing end is adopted
With quincunx spout, enhance silencer noise reduction effect.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (5)
1. a kind of natural gas vent sound deadener, including air inlet main pipe (1), air intake branch a (21), air intake branch b (22), into
Gas branch pipe c (23), expansion chambers a (31), expansion chambers b (32), expansion chambers c (33), exhaust branch pipe a (41), exhaust branch pipe b (42),
Exhaust branch pipe c (43), exhaust main pipe (5), quincunx spout (6), it is characterised in that: expansion chambers a (31) includes interpolation pipe one
(7), interpolation pipe two (10), interpolation pipe three (14), perforated pipe one (9), perforated pipe two (13) and partition (11), expansion chambers a (31)
It is interior that chamber one (8), chamber two (12), expansion chambers b (32), expansion chambers c (33) and expansion chambers a are separated to form by partition (11)
(31) structure is identical.
2. a kind of natural gas vent sound deadener according to claim 1, it is characterised in that: air inlet main pipe (1) with put
Empty standpipe uses flange or welded connecting, and the diameter of air inlet main pipe (1) is equal with emptying standpipe upper shell diameter.
3. a kind of natural gas vent sound deadener according to claim 1, it is characterised in that: chamber one (8) can disappear
Except the noise for first noise peak frequency that natural gas vent generates, chamber two (12) can eliminate natural gas vent generation
The noise of second noise peak frequency.
4. a kind of natural gas vent sound deadener according to claim 1, it is characterised in that: interpolation pipe one (7) insertion
In chamber one (8), the length that intracavitary section of interpolation pipe one (7) is the 1/2 of chamber one (8) length, can eliminate natural gas vent production
Raw wavelength is that the odd-multiple of 2 times of chamber one (8) length passes through frequency；Interpolation pipe two (10) is inserted into partition (11), partition (11)
Interpolation pipe two (10) is divided into two parts, first part is located in chamber one (8), and the length of first part is long for chamber one (8)
The 1/4 of degree, can eliminate natural gas vent generation wavelength be 2 times of chamber one (8) length even-multiple by frequency, second
For quartile in chamber two (12), the length of second part is the 1/2 of chamber two (12) length, can eliminate natural gas vent generation
Wavelength be 2 times of chamber two (12) length odd-multiple pass through frequency；Interpolation pipe three (14) is inserted into chamber two (12), interpolation pipe
The length that intracavitary section of three (14) is the 1/4 of chamber two (12) length, and the wavelength that can eliminate natural gas vent generation is 2 times of chambers
The even-multiple of two (12) length passes through frequency.
5. a kind of natural gas vent sound deadener according to claim 1, it is characterised in that: perforated pipe one (9) will be interior
One (7) of intubation are connected with interpolation pipe two (10), and interpolation pipe two (10) is connect by perforated pipe two (13) with interpolation pipe three (14)
Get up, perforated pipe one (9), perforated pipe two (13) are that aperture is distributed on wall surface is that 3~10mm eyelet and punching rate are greater than 30%
Perforated pipe, perforated pipe can reduce drag losses of the natural gas by silencer, improve the aerodynamic quality of silencer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920281818.3U CN209557878U (en) | 2019-03-06 | 2019-03-06 | A kind of natural gas vent sound deadener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920281818.3U CN209557878U (en) | 2019-03-06 | 2019-03-06 | A kind of natural gas vent sound deadener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209557878U true CN209557878U (en) | 2019-10-29 |
Family
ID=68312416
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920281818.3U Expired - Fee Related CN209557878U (en) | 2019-03-06 | 2019-03-06 | A kind of natural gas vent sound deadener |
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| CN (1) | CN209557878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764204A (en) * | 2019-03-06 | 2019-05-17 | 西南石油大学 | A kind of natural gas vent sound deadener |
-
2019
- 2019-03-06 CN CN201920281818.3U patent/CN209557878U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764204A (en) * | 2019-03-06 | 2019-05-17 | 西南石油大学 | A kind of natural gas vent sound deadener |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191029 |