JPH051811A - Device to silence discharged smoke pipe noise - Google Patents
Device to silence discharged smoke pipe noiseInfo
- Publication number
- JPH051811A JPH051811A JP3021369A JP2136991A JPH051811A JP H051811 A JPH051811 A JP H051811A JP 3021369 A JP3021369 A JP 3021369A JP 2136991 A JP2136991 A JP 2136991A JP H051811 A JPH051811 A JP H051811A
- Authority
- JP
- Japan
- Prior art keywords
- resistant
- smoke pipe
- discharged smoke
- vibrating plate
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
- Pipe Accessories (AREA)
- Chimneys And Flues (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は排煙管内を通るブロア
の騒音をスピーカーで打消す騒音打消し装置の改良に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a noise canceling device which cancels noise of a blower passing through a smoke exhaust pipe with a speaker.
【０００２】[0002]
【従来の技術】図２は従来の排煙管の騒音打消し装置を
示すもので、図において、(1)は例えば焼却炉からの排
煙管、(2)はこの排煙管の周壁に設けた開口、(3)はこの
開口を閉塞し上記排煙管内を通る騒音を打消す音を出す
振動板、(4)はこの振動板の外周縁部を支持するフレー
ム、(5)はこのフレームを載置させたトッププレート、
(6)はこのトッププレートとの間に磁気空隙を形成する
逆Ｔ字形のセンターポール、(7)はこのセンターポール
と上記トッププレートとの間に設けた永久磁石、(8)は
上記磁気空隙に挿入されたボイスコイルボビン、(8a)は
これに巻装されたボイスコイル、(9)は上記ボイスコイ
ルボビンの支持用ダンパー、(10)は上記振動板(3)の中
央部に設けたダストキャップである。2. Description of the Related Art FIG. 2 shows a conventional noise canceling device for a smoke exhaust pipe. In the figure, (1) is a smoke exhaust pipe from an incinerator, and (2) is a peripheral wall of the smoke exhaust pipe. An opening provided, (3) a diaphragm that blocks this opening and makes a noise that cancels the noise passing through the smoke exhaust pipe, (4) is a frame that supports the outer peripheral edge of this diaphragm, and (5) is this A top plate on which the frame is placed,
(6) is an inverted T-shaped center pole forming a magnetic gap with the top plate, (7) is a permanent magnet provided between the center pole and the top plate, and (8) is the magnetic gap. The voice coil bobbin inserted in the, (8a) is a voice coil wound around it, (9) is a damper for supporting the voice coil bobbin, (10) is a dust cap provided at the center of the diaphragm (3) Is.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の消音装置で
は、騒音打消し用スピーカーユニットの振動板に高温度
の排煙が触れるので、この振動板は耐熱材を用いた耐熱
構造としても、この振動板を駆動するボイスコイルボビ
ン及びこれに巻装されたボイスコイル等の耐熱温度の上
限は約８０℃になっているので、それ以上の高温に耐え
ることは困難である。また排煙中にはＳＯ2ガス等も含
まれているので化学的な損傷も起こるという問題点があ
った。In the above conventional silencer, since the high-temperature smoke is brought into contact with the diaphragm of the noise canceling speaker unit, this diaphragm has a heat-resistant structure using a heat-resistant material. Since the upper limit of the heat resistant temperature of the voice coil bobbin that drives the diaphragm and the voice coil wound around it is about 80 ° C., it is difficult to withstand higher temperatures. In addition, since the flue gas contains SO 2 gas and the like, there is a problem that chemical damage also occurs.
【０００４】この発明は上記の問題点を解消するために
なされたもので、振動板を耐熱、耐酸性に構成すると共
に、この振動板とその駆動系とは離反させて相互間での
熱伝導を遮断することを目的とする。The present invention has been made in order to solve the above-mentioned problems. The vibration plate is made heat-resistant and acid-resistant, and the vibration plate and its drive system are separated from each other to conduct heat to each other. The purpose is to cut off.
【０００５】[0005]
【課題を解決するための手段】この発明の騒音打消し装
置に使用されるスピーカーユニットでは、例えばチタン
等の耐熱、耐酸性の振動板を使用し、これで排煙管の周
壁に設けた開口を塞ぎ、かつこの振動板をこれから離反
され熱伝導が遮断された電磁駆動源で振動させるように
している。In the speaker unit used in the noise canceling apparatus of the present invention, a heat-resistant and acid-resistant diaphragm made of, for example, titanium is used, and the opening provided in the peripheral wall of the smoke exhaust pipe is used. And the diaphragm is vibrated by an electromagnetic drive source which is separated from the diaphragm to block heat conduction.
【０００６】[0006]
【作用】この発明のものにおける振動板は耐熱、耐酸性
であるので排煙によって浸蝕されず、また振動板とその
駆動源との熱伝導が遮断される。The vibrating plate of the present invention is heat-resistant and acid-resistant, so that it is not corroded by smoke exhaust, and heat conduction between the vibrating plate and its drive source is cut off.
【０００７】[0007]
【実施例】以下この発明の一実施例について説明する。
すなわち図１において(11)は排煙管でこれには例えば焼
却炉等から排煙ブロアで吸上げられた高温の排煙が流れ
る。この排煙による騒音は主に上記ブロアによるもので
あるので、この騒音と逆相の音を排煙管内に放射するた
めにその周壁に開口(12)が設けられている。(13)はこの
開口を閉塞する振動板で、この振動板(13)は例えばチタ
ン等の耐熱、耐酸性に優れた材料の成形品であり、その
背面には軟鉄板等の磁性体(14)が重合固着されている。
(15)は上記振動板の電磁駆動源で永久磁石から成るセン
ターポール(15a)と、これを中心とする駆動電流コイル
(15b)及びその周囲の強磁性体から成るヨーク(15c)とで
構成され、それが筒状脚(16)で上記振動板(13)と離反さ
れた状態にその背部に取付けられており、振動板(13)か
らの熱の伝導が遮断されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below.
That is, in FIG. 1, (11) is a smoke exhaust pipe through which high temperature exhaust smoke sucked up by an exhaust gas blower from an incinerator or the like flows. Since the noise due to the smoke exhaust is mainly due to the blower, an opening (12) is provided on the peripheral wall of the smoke exhaust pipe in order to radiate a sound having a phase opposite to that of the noise into the smoke exhaust pipe. (13) is a diaphragm that closes this opening, and this diaphragm (13) is a molded product of a material having excellent heat resistance and acid resistance, such as titanium, and has a magnetic material (14) such as a soft iron plate on its back surface. ) Is polymerized and fixed.
(15) is a center pole (15a) consisting of a permanent magnet, which is an electromagnetic drive source for the diaphragm, and a drive current coil centered on the center pole (15a).
(15b) and a yoke (15c) made of a ferromagnetic material around it, and is attached to the back of the diaphragm (13) in a state of being separated from the diaphragm (13) by a cylindrical leg (16), The conduction of heat from the diaphragm (13) is blocked.
【０００８】したがって高温個所、多湿個所あるいは砂
塵などの多い劣悪な環境に広く使用できる。ただし再生
音はＨiＦiでは無いが音声等の再生には充分であり、ま
た排煙管内を通る騒音打消しの対象は約５００Ｈz以下
の低音域(ブロアの騒音のため)であり、高域の必要が無
いので振動系が金属等で構成され若干重くなってもよ
い。Therefore, it can be widely used in high temperature locations, high humidity locations, or in poor environments with many dust particles. However, although the reproduced sound is not HiFi, it is sufficient for reproduction of voice and the like, and the target of noise cancellation that passes through the smoke exhaust pipe is in the low sound range of about 500 Hz or less (because of blower noise), so high range is required. Therefore, the vibration system may be made of metal or the like and may be slightly heavy.
【０００９】[0009]
【発明の効果】この発明の排煙管の騒音打消し装置は以
上のように構成しているので、特に熱や酸に弱い駆動電
流コイルが排煙から完全に隔離されることになり、悪環
境下でも長期使用に耐えられる排煙管の騒音打消し装置
が得られる。Since the noise canceling device for the smoke exhaust pipe of the present invention is configured as described above, the drive current coil, which is particularly vulnerable to heat and acid, is completely isolated from the smoke exhaust. A smoke flue noise canceling device that can withstand long-term use even in an environment can be obtained.
【図１】この発明の排煙管の騒音打消し装置の一実施例
を示す水平断面図。FIG. 1 is a horizontal sectional view showing an embodiment of a noise canceling device for a smoke exhaust pipe of the present invention.
【図２】従来の排煙管の騒音打消し装置を示す水平断面
図。FIG. 2 is a horizontal sectional view showing a conventional noise canceling device for a smoke exhaust pipe.
１１ 排煙管 １２ 開口 １３ 振動板 １５ 電磁駆動源 11 Smoke exhaust pipe 12 Opening 13 Vibration plate 15 Electromagnetic drive source
Claims (1)
を封塞する金属等の耐熱、耐酸性の振動板と、これと離
反されて熱伝導が遮断された上記振動板の電磁駆動源と
から成る電磁形スピーカーユニットを取付けて成る排煙
管の騒音打消し装置。Claim: What is claimed is: 1. A heat-resistant and acid-resistant diaphragm made of metal or the like which seals the opening in the opening provided in the peripheral wall of the smoke exhaust pipe, and heat conduction is cut off from the diaphragm. Also, a noise canceling device for a smoke exhaust pipe, which is provided with an electromagnetic speaker unit including the electromagnetic drive source for the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3021369A JPH051811A (en) | 1991-01-23 | 1991-01-23 | Device to silence discharged smoke pipe noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3021369A JPH051811A (en) | 1991-01-23 | 1991-01-23 | Device to silence discharged smoke pipe noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH051811A true JPH051811A (en) | 1993-01-08 |
Family
ID=12053185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3021369A Pending JPH051811A (en) | 1991-01-23 | 1991-01-23 | Device to silence discharged smoke pipe noise |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH051811A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0674097A1 (en) * | 1994-02-22 | 1995-09-27 | ELECTRONIC SOUND ATTENUATION S.p.A. | Active exhaust gas muffler |
| JP2008064093A (en) * | 2006-09-06 | 2008-03-21 | J Eberspecher Gmbh & Co Kg | Active muffler for exhaust system |
| JP2018502249A (en) * | 2014-12-19 | 2018-01-25 | ゼネラル・エレクトリック・カンパニイ | Active noise control system |
-
1991
- 1991-01-23 JP JP3021369A patent/JPH051811A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0674097A1 (en) * | 1994-02-22 | 1995-09-27 | ELECTRONIC SOUND ATTENUATION S.p.A. | Active exhaust gas muffler |
| JP2008064093A (en) * | 2006-09-06 | 2008-03-21 | J Eberspecher Gmbh & Co Kg | Active muffler for exhaust system |
| JP2018502249A (en) * | 2014-12-19 | 2018-01-25 | ゼネラル・エレクトリック・カンパニイ | Active noise control system |
| US10436086B2 (en) | 2014-12-19 | 2019-10-08 | General Electric Company | Active noise control system |
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