JPH0443706Y2 - - Google Patents
Info
- Publication number
- JPH0443706Y2 JPH0443706Y2 JP1987138023U JP13802387U JPH0443706Y2 JP H0443706 Y2 JPH0443706 Y2 JP H0443706Y2 JP 1987138023 U JP1987138023 U JP 1987138023U JP 13802387 U JP13802387 U JP 13802387U JP H0443706 Y2 JPH0443706 Y2 JP H0443706Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- outer cylinder
- low
- exhaust
- temperature
- 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、各種のガス燃焼装置やボイラ等の排
気ガス排出口部において、高温排気ガスの温度を
効率良く低下させて排出する拡散排気筒に関す
る。[Detailed description of the invention] [Industrial application field] The present invention is a diffusion exhaust stack that efficiently lowers the temperature of high-temperature exhaust gas and discharges it at the exhaust gas outlet of various gas combustion devices and boilers. Regarding.
従来の拡散排気筒は、高温の排気ガスを外部の
冷たい空気と混合させることによつて低温化しよ
うという構造であるが、内部構造が複雑であるた
め高価だつたり、また、実開昭49−48541号に記
載の燃焼器の吸排気筒装置と実開昭54−117627号
に記載のガス器具の排気装置のように、外部から
空気を吸込む際の吸込力が小さくて冷却効率が低
い、などの問題が存在していた。
Conventional diffusion exhaust stacks have a structure that lowers the temperature of the high-temperature exhaust gas by mixing it with cold air outside, but it is expensive due to its complicated internal structure, and it - Like the combustor intake and exhaust stack device described in No. 48541 and the gas appliance exhaust device described in Utility Model Application Publication No. 117627, the suction force when sucking air from the outside is small and the cooling efficiency is low. There was a problem.
本考案は、上記問題点を解決した拡散排気筒を
提供することを目的としている。 The present invention aims to provide a diffusion exhaust stack that solves the above problems.
本考案に係る拡散排気筒は、燃焼室に接続する
円筒形状の接続筒の上方開口端部に上方から所定
深さだけ突入する先細状テーパ面を有する絞り部
材を設けて、高温の排気ガスが上昇しつつ通過す
る上記接続筒の流路面積を上方開口端部に於て減
少させる断面円環状の排気ガス通路を形成し、該
断面円環状排気ガス通路に於ける排気ガスの流速
を増加することによつて該排気ガスの圧力を低圧
状態とし、さらに、上記接続筒の一部及び上記絞
り部材の外周側に包囲状として外筒を設けると共
に該外筒の上端部に施蓋状に天板を設けて、低圧
排気ガスによつて低温の流入空気が吸入される空
気吸入口を、上記上方開口端部よりも下方の上記
外筒の下端部と上記接続筒との間に形成したもの
である。
The diffusion exhaust stack according to the present invention is provided with a throttle member having a tapered surface that protrudes from above to a predetermined depth at the upper opening end of the cylindrical connecting pipe that connects to the combustion chamber, so that high-temperature exhaust gas is An exhaust gas passage having an annular cross section is formed to reduce the flow path area of the connecting cylinder passing through it at the upper opening end thereof, and the flow velocity of the exhaust gas in the exhaust gas passage having an annular cross section is increased. In this way, the pressure of the exhaust gas is reduced to a low pressure state, and further, an outer cylinder is provided in a surrounding manner around a part of the connecting cylinder and the outer periphery of the throttle member, and a ceiling is provided on the upper end of the outer cylinder in the form of a cover. A plate is provided to form an air inlet through which low-temperature inflow air is drawn in by low-pressure exhaust gas between the lower end of the outer cylinder below the upper opening end and the connecting cylinder. It is.
接続筒内を上昇する排気ガスは、該接続筒の上
方開口端部の所で流路が狭まるため、その付近で
流速が増加して圧力低下が生じる。この圧力低下
により、下方の空気吸入口から冷たい空気が吸入
され、接続筒と外筒との間の通路を、相互に混合
されつつ上昇する。上方開口端部においては、排
気ガスの流路断面は略円環状であり、かつ、水平
方向の速度成分を有するので、上昇する冷たい空
気流がこれらに衝突して十分に混合される。外部
空気と混合し低温化された排気ガスは、外筒内を
上昇しつつ、下方の空気吸入口から連続的に吸入
される空気とさらに混合された後、外部へ流出す
る。接続筒内を上昇する排気ガスは、上方開口端
部において絞り部材に衝突するが、絞り部材の先
細状テーパ面によつて、流路断面を円形から円環
状に変換される。
The flow path of the exhaust gas rising inside the connecting cylinder narrows at the upper open end of the connecting cylinder, so the flow velocity increases in the vicinity, causing a pressure drop. Due to this pressure drop, cold air is sucked in from the lower air inlet and moves upward through the passage between the connecting tube and the outer tube while being mixed with each other. At the upper opening end, the cross section of the exhaust gas flow path is approximately annular and has a velocity component in the horizontal direction, so the rising cold air flow collides with these and is sufficiently mixed. The exhaust gas, which has been mixed with external air and reduced in temperature, rises within the outer cylinder and is further mixed with air that is continuously sucked in from the lower air intake port, and then flows out to the outside. The exhaust gas rising inside the connecting cylinder collides with the throttle member at the upper opening end, but the cross section of the flow path is changed from circular to annular by the tapered surface of the throttle member.
本考案の実施例を図面に基づいて詳説する。 Embodiments of the present invention will be explained in detail based on the drawings.
第１図と第２図において、１は排気孔２…を有
する外筒であり、３は燃焼室に接続する円筒形状
の接続筒であつて、上記外筒１の下端部４には該
接続筒３の上端部が挿通されている。外筒１の内
部には絞り部材５が配置され、該絞り部材５は結
合片６…によつて外筒１の内周面７に固着されて
いる。 1 and 2, 1 is an outer cylinder having exhaust holes 2, 3 is a cylindrical connecting cylinder connected to the combustion chamber, and the lower end 4 of the outer cylinder 1 is connected to the outer cylinder 1. The upper end of the cylinder 3 is inserted. A throttle member 5 is disposed inside the outer cylinder 1, and the throttle member 5 is fixed to the inner circumferential surface 7 of the outer cylinder 1 by coupling pieces 6.
しかして、上記接続筒３の上方開口端部８に
は、上方から所定寸法Ｍだけ突入する先細状テー
パ面９を有する絞り部材５を設ける。 The upper opening end 8 of the connecting tube 3 is provided with a diaphragm member 5 having a tapered surface 9 that protrudes from above by a predetermined distance M.
この絞り部材５によつて、接続筒３の流路面積
を上方開口端部８に於て、減少させる。 This throttle member 5 reduces the flow path area of the connecting tube 3 at the upper open end 8.
即ち、上方開口端部８に、断面円環状排気ガス
通路１０を形成し、この円環状排気ガス通路１０
に於て、排気ガスG2の流速を増加させることに
よつて、（ベルヌーイの定理により）該排気ガス
G2の圧力を低圧状態とする。 That is, an exhaust gas passage 10 having an annular cross section is formed at the upper opening end 8, and this annular exhaust gas passage 10
By increasing the flow velocity of the exhaust gas G 2 (according to Bernoulli's theorem),
The pressure of G 2 is set to a low pressure state.
また、絞り部材５の絞り部２１はコーン形に形
成され、先細状テーパ面９は円錘面である。 Further, the aperture portion 21 of the aperture member 5 is formed in a cone shape, and the tapered surface 9 is a conical surface.
しかして、接続筒３の一部（図例では上半部）
及び上記絞り部材５の外周側に包囲状として外筒
１を設けて、低圧排気ガスG2によつて低温の流
入空気Ａが吸入される空気吸入口１１を、上記上
方開口端部８よりも下方の上記外筒１の下端部４
と上記接続筒３との間に形成する。外筒１と、絞
り部材５の本体部１２とは何れも円筒状に形成さ
れ、また、外筒１、絞り部材５及び接続筒３は相
互に同一軸心状となるように配置されている。絞
り部材５の本体部１２は、筒状板１３と、該筒状
板１３の上端に付設されると共に上側に凹所１４
を有する蓋１５と、からなる。該筒状板１２の下
端縁１６は先細状テーパ面９から若干突出状とさ
れ、また、筒状板１３の外周面には周状部材１７
が付設されており、これらは何れも排気孔２…か
ら入つてくる雨水等に対し防滴の役目をなす。 Therefore, a part of the connecting tube 3 (in the example, the upper half)
An outer cylinder 1 is provided around the outer circumferential side of the throttle member 5, and the air intake port 11 through which the low-temperature inflow air A is sucked in by the low-pressure exhaust gas G2 is arranged so as to be closer to the upper opening end 8. Lower end 4 of the lower outer cylinder 1
and the connecting tube 3. The outer cylinder 1 and the main body part 12 of the aperture member 5 are both formed in a cylindrical shape, and the outer cylinder 1, the aperture member 5, and the connecting cylinder 3 are arranged so as to be coaxial with each other. . The main body 12 of the aperture member 5 includes a cylindrical plate 13 and a recess 14 attached to the upper end of the cylindrical plate 13.
and a lid 15 having a. The lower end edge 16 of the cylindrical plate 12 is slightly protruded from the tapered surface 9, and a circumferential member 17 is formed on the outer peripheral surface of the cylindrical plate 13.
Both of these serve as drip-proof against rainwater etc. coming in from the exhaust holes 2.
なお、絞り部材５は、内部に排気ガスが浸入し
ないように、全体が密閉状とされている。 Note that the throttle member 5 is entirely sealed so that exhaust gas does not infiltrate inside.
外筒１の上端部には天板１９が設けられて施蓋
状とされ、従つて、外筒１については排気孔２…
以外から排気ガス等が流出することはない。排気
孔２…については、円筒部１８のうち天板１９か
ら下方へ距離Ｈに相当する部分にのみ形成されて
おり、具体的には、先細状テーパ面９の上端部よ
り若干高い位置に付設される。なお、仮想線で示
す２０は接続筒３の取付部材である。 A top plate 19 is provided at the upper end of the outer cylinder 1 to form a lid, and therefore, the outer cylinder 1 has exhaust holes 2...
Exhaust gas, etc. will not leak out from any other source. The exhaust holes 2 are formed only in a portion of the cylindrical portion 18 corresponding to a distance H downward from the top plate 19, and specifically, they are provided at a position slightly higher than the upper end of the tapered surface 9. be done. Note that 20 indicated by a virtual line is a mounting member for the connecting tube 3.
図外のガス燃焼装置からの高温の排気ガスG1
は、接続筒３内を上昇し、上方開口端部８の近傍
部で先細状テーパ面９に下方から衝突すると共
に、平面視略円環状の排気ガス通路１０を通過す
る。該排気ガス通路１０の断面積は絞られている
ため、流速が増加し、この流速増加量に対応して
該通路１０の近傍部では圧力減少を生じる。この
結果、該通路１０の近傍部における排気ガスG2
は低圧状態となり、下方の空気吸入口１１から低
温の流入空気Ａが連続的に強力に吸入される。上
記通路１０を通過する低圧排気ガスG2は上方開
口端部８において先細状テーパ面９と強く衝突し
て外径方向へ拡散し、低温の流入空気Ａの上昇流
と衝突して両者は強力に混合し、排気ガス温度が
急激に低下する。この低温化した排気ガスG3は、
円筒部１８と筒状板１３との間隙を上昇する間も
空気吸入口１１からの流入空気Ａと混合され、一
層低温化された排気ガスG4となつて、排気孔２
…から流出する。 High-temperature exhaust gas G 1 from a gas combustion device not shown
rises within the connecting tube 3, collides with the tapered surface 9 from below in the vicinity of the upper open end 8, and passes through the exhaust gas passage 10, which is generally annular in plan view. Since the cross-sectional area of the exhaust gas passage 10 is narrowed, the flow velocity increases, and the pressure decreases in the vicinity of the passage 10 in response to the increase in flow velocity. As a result, the exhaust gas G 2 in the vicinity of the passage 10
is in a low pressure state, and low-temperature inflow air A is continuously and strongly sucked in from the lower air intake port 11. The low-pressure exhaust gas G 2 passing through the passage 10 strongly collides with the tapered surface 9 at the upper opening end 8 and diffuses in the outer radial direction, collides with the upward flow of the low-temperature inflow air A, and both of them are strongly The exhaust gas temperature drops rapidly. This cooled exhaust gas G3 is
While rising through the gap between the cylindrical portion 18 and the cylindrical plate 13, it is mixed with the inflow air A from the air intake port 11, and becomes even lower temperature exhaust gas G4 , which flows into the exhaust hole 2.
It flows out from...
絞り部材５については、第３図に示すように、
本体部１２を上方へ延伸させ天板１９と固着する
ようにしてもよい。また、先細状テーパ面９の先
端は、図示仮想線のように丸味先端部２３とする
も好ましい。また、第１図中の仮想線２４にて示
すように防水筒を介設するも好ましいことがあ
る。さらに図示省略するが、絞り部２１を排気筒
３に、取付片にて連結することも可能である。 Regarding the aperture member 5, as shown in FIG.
The main body part 12 may be extended upward and fixed to the top plate 19. Further, it is preferable that the tip of the tapered surface 9 is rounded as shown in the imaginary line in the figure. Further, it may be preferable to provide a waterproof tube as shown by the imaginary line 24 in FIG. Furthermore, although not shown, it is also possible to connect the throttle part 21 to the exhaust pipe 3 with a mounting piece.
本考案は、次に記載するような著大な効果を奏
する。
The present invention has significant effects as described below.
排気ガス通路１０を通過して圧力低下した排
気ガスG2によつて、低温の流入空気Ａが強力
に吸入されると共に、先細状テーパ面９にて外
径方向へ拡散した排気ガスG2が、流入空気Ａ
と強力に混合するので、急激に低温化できる。 Due to the exhaust gas G 2 whose pressure has decreased after passing through the exhaust gas passage 10, the low-temperature incoming air A is strongly sucked in, and the exhaust gas G 2 diffused in the outer radial direction at the tapered surface 9 is , incoming air A
Because it mixes strongly with the water, the temperature can be lowered rapidly.
低温化した排気ガスG3は、円筒部１８と筒
状板１３との間隙を上昇する間も空気吸入口１
１からの流入空気Ａと混合するので、一層低温
化して排気孔２…から排気することができる。 The cooled exhaust gas G3 continues to flow through the air intake port 1 while rising through the gap between the cylindrical portion 18 and the cylindrical plate 13.
Since it mixes with the incoming air A from 1, the temperature can be further reduced and it can be exhausted from the exhaust holes 2.
冷却効率が高く、十分に排気ガスを低温化で
きるので、外筒１自体及びその周囲の温度上昇
が防止でき、屋内へ設置しても周囲への影響が
少ない。 Since the cooling efficiency is high and the temperature of the exhaust gas can be sufficiently lowered, a rise in temperature of the outer cylinder 1 itself and its surroundings can be prevented, and even if it is installed indoors, there is little impact on the surroundings.
コンパクトで構造が簡素である。 It is compact and has a simple structure.
第１図は本考案の一実施例を示す断面側面図、
第２図は第１図の−線断面矢視図、第３図は
他の実施例を示す断面側面図である。
１……外筒、３……接続筒、４……下端部、５
……絞り部材、８……上方開口端部、９……先細
状テーパ面、１０……排気ガス通路、１１……空
気吸入口。
FIG. 1 is a cross-sectional side view showing an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. 3 is a cross-sectional side view showing another embodiment. 1...Outer tube, 3...Connecting tube, 4...Lower end, 5
...Aperture member, 8...Upper opening end, 9...Tapered surface, 10...Exhaust gas passage, 11...Air intake port.
Claims (1)
口端部８に上方から所定深さＭだけ突入する先細
状テーパ面９を有する絞り部材５を設けて、高温
の排気ガスG1が上昇しつつ通過する上記接続筒
３の流路面積を上方開口端部８に於て減少させる
断面円環状の排気ガス通路１０を形成し、該断面
円環状排気ガス通路１０に於ける排気ガスG2の
流速を増加することによつて該排気ガスG2の圧
力を低圧状態とし、さらに、上記接続筒３の一部
及び上記絞り部材５の外周側に包囲状として外筒
１を設けると共に該外筒１の上端部に施蓋状に天
板１９を設けて、低圧排気ガスG2によつて低温
の流入空気Ａが吸入される空気吸入口１１を、上
記上方開口端部８よりも下方の上記外筒１の下端
部４と上記接続筒３との間に形成したことを特徴
とする拡散排気筒。 A throttle member 5 having a tapered surface 9 protruding from above by a predetermined depth M is provided in the upper opening end 8 of the cylindrical connecting tube 3 connected to the combustion chamber, so that the high temperature exhaust gas G1 rises. An exhaust gas passage 10 having an annular cross section is formed to reduce the flow area of the connecting cylinder 3 through which it passes at the upper opening end 8, and the exhaust gas G2 in the exhaust gas passage 10 having an annular cross section is formed. By increasing the flow velocity, the pressure of the exhaust gas G 2 is reduced to a low pressure state, and furthermore, an outer cylinder 1 is provided in a surrounding shape around a part of the connecting cylinder 3 and the throttle member 5, and the outer cylinder A top plate 19 is provided in the form of a lid at the upper end of the air inlet 11, through which the low-temperature inflow air A is sucked in by the low-pressure exhaust gas G2 . A diffusion exhaust pipe characterized in that it is formed between a lower end portion 4 of an outer cylinder 1 and the connecting pipe 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987138023U JPH0443706Y2 (en) | 1987-09-09 | 1987-09-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987138023U JPH0443706Y2 (en) | 1987-09-09 | 1987-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6446634U JPS6446634U (en) | 1989-03-22 |
| JPH0443706Y2 true JPH0443706Y2 (en) | 1992-10-15 |
Family
ID=31399981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987138023U Expired JPH0443706Y2 (en) | 1987-09-09 | 1987-09-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443706Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ569850A (en) * | 2008-07-16 | 2011-03-31 | Herville Neville Donald D | Chimney cover with diffuser and sleeve sides enclosing expansion area |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4948541U (en) * | 1972-08-03 | 1974-04-27 | ||
| JPS54117627U (en) * | 1978-02-06 | 1979-08-17 |
-
1987
- 1987-09-09 JP JP1987138023U patent/JPH0443706Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6446634U (en) | 1989-03-22 |
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