CN111219562A - Pipeline silencer - Google Patents
Pipeline silencer Download PDFInfo
- Publication number
- CN111219562A CN111219562A CN201811420759.XA CN201811420759A CN111219562A CN 111219562 A CN111219562 A CN 111219562A CN 201811420759 A CN201811420759 A CN 201811420759A CN 111219562 A CN111219562 A CN 111219562A
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- China
- Prior art keywords
- magnetic
- sound absorption
- perforated plate
- absorption cavity
- shell
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/0335—Noise absorbers by means of external rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to the technical field of pipeline silencing equipment, in particular to a pipeline silencer, which comprises a shell and a magnetic silencing sheet, wherein the magnetic silencing sheet is arranged on the shell, a sound absorption cavity is arranged in the magnetic silencing sheet, a suction structure is arranged on the sound absorption cavity, the suction structure is connected with air in the sound absorption cavity in parallel, and the magnetic silencing sheet comprises a magnet perforated plate, glass cloth and fillers; the magnet perforated plate is connected with the shell and arranged in the substrate. According to the invention, the magnet perforated plate and the vibrating diaphragm are mutually attracted to form the attraction structure with negative rigidity, so that a low-frequency sound absorption effect is realized; the structure is simple and compact, the maintenance and the disassembly are very convenient, and the maintenance and the cleaning are convenient.
Description
Technical Field
The invention relates to the technical field of pipeline silencing equipment, in particular to a pipeline silencer.
Background
A muffler is a device that prevents sound transmission while allowing airflow to pass through, and is an important measure for eliminating steam discharge dynamic noise. The silencer of the pipeline silencer is mainly used for effectively silencing steam emission of boilers, steam turbines and other thermal equipment in the industry, and is also widely used for silencing steam emission and other gases of boilers in the industries of petroleum, chemical engineering, metallurgy, textile and the like.
Most of existing pipeline silencers adopt an impedance composite silencing principle, a resistive sound absorption cotton structure is additionally arranged outside an expansion chamber, and the existing pipeline silencers are designed according to the frequency spectrum characteristics of residual noise emitted by a pressure reduction body and used for effectively absorbing the residual noise. The silencer is easy to maintain frequently, has poor silencing effect and short service cycle due to the complex structure, heavy weight, high-temperature oxidation sound absorption filler, high-speed airflow impact sound absorption filler, water vapor permeation sound absorption filler and the like. The reactive resonance silencer is designed by using a resonance sound absorption principle, has a relatively narrow working frequency band, but has the advantages of no use of any resistive sound absorption filler, no pollution and the like, so the reactive resonance silencer is widely concerned in the field of noise control. However, the volume of the cavity required by such mufflers is often very large at low frequencies, making such structures difficult for practical engineering applications requiring thin and light mufflers.
Disclosure of Invention
In order to solve the problems, the invention provides a pipeline silencer, which comprises the following specific technical scheme:
the utility model provides a pipeline silencer, includes casing and magnetism noise elimination piece, magnetism noise elimination piece is installed the casing, be equipped with the sound absorption cavity in the magnetism noise elimination piece, be provided with the suction structure on the sound absorption cavity, the suction structure has negative rigidity, the air in the sound absorption cavity has positive rigidity, the suction structure with parallelly connected between the air in the sound absorption cavity. Therefore, the depth of the sound absorption cavity is compressed under the action of the magnetic force negative rigidity, and the low-frequency sound absorption effect is realized.
The magnetic silencing piece comprises a magnet perforated plate, glass cloth and filler. One end of the matrix is connected with the shell through a magnet perforated plate, the magnet perforated plate is arranged in the matrix, and the magnet perforated plate and the vibrating diaphragm are mutually attracted to form the suction structure with negative rigidity; the sound absorption cavity is positioned in the base body and is arranged between the magnet and the vibrating diaphragm.
Preferably, the filler is made of sound absorption material with a superfine glass surface.
Preferably, the vibrating diaphragm is made of a metal alloy material.
Preferably, a magnetic layer is arranged on the diaphragm.
Preferably, the magnetic noise reduction sheet is detachably inserted into the shell.
Preferably, the magnetic noise reduction sheet is fixedly connected to the shell.
Preferably, one or more magnetic noise reduction sheets are connected to the housing, and the one or more magnetic noise reduction sheets are respectively installed inside and/or outside the housing.
Has the advantages that: the pipeline silencer comprises a shell and a magnetic silencing sheet, wherein the magnetic silencing sheet is arranged on the shell, a sound absorption cavity is arranged in the magnetic silencing sheet, a suction structure is arranged on the sound absorption cavity, and the suction structure is connected with air in the sound absorption cavity in parallel, so that the low-frequency sound absorption effect is realized under the action of magnetic negative rigidity.
In addition, the pipeline silencer is simple and compact in structure, very convenient to maintain and disassemble and convenient to maintain and clean.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view showing that the magnetic noise-reduction sheet of the present invention is installed outside/inside the housing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a pipeline silencer, includes casing 1 and magnetism noise elimination piece 4, magnetism noise elimination piece 4 is installed at casing 1, be equipped with sound absorption cavity 3 in the magnetism noise elimination piece 4, be provided with the suction structure on the sound absorption cavity 3, the suction structure has negative rigidity, the air in the sound absorption cavity has positive rigidity, the suction structure with parallelly connected between the air in the sound absorption cavity. Therefore, the depth of the sound absorption cavity 3 is compressed under the action of the magnetic force negative rigidity, and the low-frequency sound absorption effect is realized. The magnetic silencing pieces are detachably inserted into the shell, so that the magnetic silencing pieces are very convenient to maintain and disassemble and convenient to maintain and clean.
The magnetic noise canceling sheet 4 of the present embodiment includes a magnet perforated plate 41, a glass cloth 42, and a filler 43. The two magnet perforated plates 41 are attached with glass cloth 42, and a filler 43 is arranged between the two glass cloths 42. The magnet perforated plate 41 is connected with the shell 1, and the magnet perforated plate 41 and the diaphragm 2 are mutually attracted to form the attraction structure with negative rigidity; the sound absorption cavity 3 is located between the magnet perforated plate 41 and the diaphragm 2. When high-speed airflow in the inner cavity of the shell 1 passes through, the vibrating diaphragm 2 transmits sound waves into the sound absorption cavity 3 through vibration; the magnetic silencing sheet 4 and the vibrating diaphragm 2 are mutually attracted to form a suction structure with negative rigidity, the suction structure is connected with the air in the inner cavity of the sound absorption cavity 3 in parallel, and the depth of the sound absorption cavity 3 is compressed by utilizing the negative rigidity action of the suction structure, so that the sound absorption effect of lower frequency is realized; the material of the preferable filler 43 is an ultrafine glass surface sound absorption material, the material of the preferable vibration diaphragm 2 is a metal alloy, a magnetic layer is arranged on the preferable vibration diaphragm 2, and when the material of the vibration diaphragm 2 is an iron alloy or a plastic attached with the magnetic layer, the magnetic force of the magnet perforated plate 41 causes the vibration diaphragm 2 and the magnet perforated plate 41 to have a relative attraction force, so as to generate a negative-stiffness attraction structure;
in the pipe silencer of the present embodiment, a plurality of magnetic muffling sheets 4 are connected to the housing 1, and as shown in fig. 2, each of the magnetic muffling sheets 4 may be installed inside the housing 1 or outside the housing 1, and similarly, when there are a plurality of magnetic muffling sheets 4, a part of the magnetic muffling sheets 4 may be installed inside the housing 1 and another part of the magnetic muffling sheets 4 may be installed outside the housing 1. Thus, when sound waves pass through the inner cavity of the pipeline, the magnetic silencing sheets 4 act simultaneously, and a more uniform silencing effect is generated around the shell 1 under the action of the suction structure with negative rigidity.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (7)
1. A pipeline silencer is characterized by comprising a shell and a magnetic silencing sheet, wherein the magnetic silencing sheet is installed on the shell, a sound absorption cavity is arranged in the magnetic silencing sheet, a suction structure is arranged on the sound absorption cavity, the suction structure has negative rigidity, air in the sound absorption cavity has positive rigidity, and the suction structure and the air in the sound absorption cavity are connected in parallel; the magnetic silencing sheet comprises a magnet perforated plate, glass cloth and fillers; the magnet perforated plate is connected with the shell, the magnet perforated plate is arranged in the substrate, and the magnet perforated plate and the vibrating diaphragm are mutually attracted to form the suction structure with negative rigidity; the sound absorption cavity is located between the magnet perforated plate and the vibrating diaphragm.
2. The pipe muffler of claim 1, wherein the filler is a microglass-faced sound absorbing material.
3. The pipe muffler of claim 1, wherein the diaphragm is made of a metal alloy.
4. The pipe muffler of claim 1, wherein the diaphragm is provided with a magnetic layer.
5. The pipe muffler according to any one of claims 1 to 4, wherein one or more of the magnetic muffling sheets are attached to the housing, and the one or more magnetic muffling sheets are installed inside and/or outside the housing, respectively.
6. The pipe muffler of claim 5, wherein the magnetic muffling sheet is removably inserted into the housing.
7. The pipe muffler of claim 5, wherein said magnetic muffling sheet is fixedly attached to said housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420759.XA CN111219562A (en) | 2018-11-27 | 2018-11-27 | Pipeline silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420759.XA CN111219562A (en) | 2018-11-27 | 2018-11-27 | Pipeline silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111219562A true CN111219562A (en) | 2020-06-02 |
Family
ID=70806358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811420759.XA Pending CN111219562A (en) | 2018-11-27 | 2018-11-27 | Pipeline silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219562A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113674727A (en) * | 2021-08-05 | 2021-11-19 | 北京市劳动保护科学研究所 | Deep sub-wavelength low-frequency sound absorption structure and sound absorption unit |
-
2018
- 2018-11-27 CN CN201811420759.XA patent/CN111219562A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113674727A (en) * | 2021-08-05 | 2021-11-19 | 北京市劳动保护科学研究所 | Deep sub-wavelength low-frequency sound absorption structure and sound absorption unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200602 |