JPH08184534A - Air pollution detector by sampling system - Google Patents
Air pollution detector by sampling systemInfo
- Publication number
- JPH08184534A JPH08184534A JP33788694A JP33788694A JPH08184534A JP H08184534 A JPH08184534 A JP H08184534A JP 33788694 A JP33788694 A JP 33788694A JP 33788694 A JP33788694 A JP 33788694A JP H08184534 A JPH08184534 A JP H08184534A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- suction
- air
- suction hole
- sampling tube
- 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.)
- Granted
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、サンプリング管により
警戒地区内の空気を吸引し、吸引した空気の汚染状態を
検出することにより警戒地区内の空気の汚染状態を検出
するサンプリング方式による空気汚染検出装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to air pollution by a sampling system in which air in a caution area is sucked by a sampling pipe and the pollution status of the sucked air is detected to detect the pollution status of air in the caution area. Regarding a detection device.
【０００２】[0002]
【従来の技術】従来、各種工場のクリーンルームや家屋
等、空気の汚染状態を監視する必要のある警戒地区に
は、複数の吸引孔が形成された長尺のサンプリング管を
用いて空気を吸引する空気汚染検出装置が広く用いられ
ている。このような空気汚染検出装置では、サンプリン
グ管の各吸引孔を介して上記警戒地区内の空気を吸引
し、吸引された空気の汚染状態を上記サンプリング管の
基端部に設けた汚染検出部にて検出することにより警戒
地区内の空気の汚染状態を検出している。また、かかる
装置を利用して空気の汚染状態のみならず、ひいては火
災の発生やその進行状況等を検出するサンプリング方式
による空気汚染検出装置も提案されている。このような
従来のサンプリング方式による空気汚染検出装置におい
ては、サンプリング管の複数の吸引孔を相互に同じ径で
形成して警戒地区内の空気を吸引していた。2. Description of the Related Art Conventionally, air is sucked using a long sampling pipe having a plurality of suction holes in a caution area such as a clean room or a house of various factories where it is necessary to monitor the state of air pollution. Air pollution detection devices are widely used. In such an air pollution detection device, the air in the caution area is sucked through the respective suction holes of the sampling tube, and the pollution state of the sucked air is detected by the pollution detection unit provided at the proximal end of the sampling tube. The air pollution status in the caution area is detected by detecting the air pollution. Further, there has been proposed an air pollution detecting device using a sampling method that detects not only the state of air pollution, but also the occurrence of a fire and the progress thereof by using such a device. In such a conventional air pollution detection device using a sampling method, a plurality of suction holes of the sampling tube are formed to have the same diameter as each other to suck air in the caution area.
【０００３】[0003]
【発明が解決しようとする課題】ここで、一般にサンプ
リング方式による空気汚染検出装置においては、サンプ
リング管の基端部に配した吸引ファンから離れた位置ほ
ど外気との差圧が小さくなる。このため、サンプリング
管の先端部側にある吸引孔の吸引圧は、基端部側にある
吸引孔の吸引圧に比べて低下することが知られている。
しかしながら、従来のサンプリング方式による空気汚染
検出装置においては、上記したようにサンプリング管の
吸引孔を単にすべて同じ径で形成していたので、上記し
た吸引圧の差により、サンプリング管の先端部側の吸引
孔での空気の吸引量が基端部側の吸引孔での吸引量に比
べて少なくなるという問題があった。そしてその結果、
同じ濃度の汚染空気に対して吸引される汚染物質の量が
吸引孔の位置によって異なり、ひいては汚染状態を正確
に検出するができないという問題があった。Generally, in an air pollution detection device of the sampling type, the pressure difference from the outside air becomes smaller as the position is farther from the suction fan arranged at the base end of the sampling tube. Therefore, it is known that the suction pressure of the suction hole on the distal end side of the sampling tube is lower than the suction pressure of the suction hole on the proximal end side.
However, in the conventional air pollution detection device based on the sampling method, since the suction holes of the sampling tube are simply formed to have the same diameter as described above, the difference in the suction pressure causes the tip end side of the sampling tube to move. There is a problem that the amount of air sucked in the suction holes is smaller than that in the suction holes on the base end side. And as a result,
There is a problem in that the amount of pollutants sucked into contaminated air of the same concentration varies depending on the position of the suction hole, and thus the polluted state cannot be accurately detected.
【０００４】例えば、サンプリング管に形成する吸引孔
を基端部側から順にＡ、Ｂ、Ｃとし、これら３つの吸引
孔から吸引される空気の総量を６Ｑとした場合におい
て、吸引孔Ａ、Ｂ、Ｃにおいて吸引される空気の量がそ
れぞれ異なり３Ｑ、２Ｑ、１Ｑであるとすれば、吸引孔
Ａにおいて２０％濃度の汚染空気が吸引された場合には
０．６Ｑ（＝３Ｑ×２０÷１００）の汚染物質が吸引さ
れることになり、検出濃度は１０％（＝１００×０．６
Ｑ÷６Ｑ）となる。これに対し、吸引孔Ｃにおいて同じ
く２０％濃度の汚染空気が吸引された場合には、汚染物
質が０．２Ｑ（＝１Ｑ×２０÷１００）しか吸引されな
いことになり、検出濃度が約３％（＝１００×０．２Ｑ
÷６Ｑ）にしかならない。従って、同じ濃度の汚染空気
に対する検出濃度が汚染空気の吸引される吸引孔の位置
によって異なることになり、汚染状態を正確に検出する
ができないという問題があった。For example, assuming that the suction holes formed in the sampling tube are A, B, and C in this order from the base end side, and the total amount of air sucked from these three suction holes is 6Q, the suction holes A and B are shown. , C are 3Q, 2Q, and 1Q, respectively, and 0.6Q (= 3Q × 20 ÷ 100) when 20% of the contaminated air is sucked in the suction hole A. ) Pollutants will be aspirated, and the detected concentration will be 10% (= 100 × 0.6
Q ÷ 6Q). On the other hand, when the contaminated air of 20% concentration is also sucked in the suction hole C, only 0.2Q (= 1Q × 20 ÷ 100) of the pollutant is sucked, and the detected concentration is about 3%. (= 100 × 0.2Q
÷ 6Q) Therefore, the detected concentration for contaminated air having the same concentration differs depending on the position of the suction hole through which the contaminated air is sucked, and there is a problem that the contaminated state cannot be accurately detected.
【０００５】ここで、このような問題を解決する手段と
して、サンプリング管に形成する吸引孔の径を相互に異
なったものとして各吸引孔における空気の吸引量を同じ
にすることも考えられるが、このような微細な孔開け作
業を個々の吸引孔ごとに施すことは非常に手間を要し、
現実には困難である。Here, as a means for solving such a problem, it is considered that the diameters of the suction holes formed in the sampling tube are made different from each other so that the suction amount of air in each suction hole is the same. It takes a great deal of time to perform such a fine hole-making operation for each individual suction hole,
It is difficult in reality.
【０００６】[0006]
【課題を解決するための手段】このような従来のサンプ
リング方式による空気汚染検出装置における問題点を解
決するために請求項１の本発明は、警戒地区に該警戒地
区内の空気を吸引するための長尺のサンプリング管を配
すると共に、該サンプリング管に対しその長手方向に沿
って上記警戒地区内の空気を吸引するための複数の吸引
孔を形成し、該吸引孔から吸引した空気の汚染状態を上
記サンプリング管の基端部に設けた汚染検出部にて検出
することにより、上記警戒地区内の空気の汚染状態を検
出するサンプリング方式による空気汚染検出装置におい
て、上記吸引孔の各々に対し、該吸引孔に装着される装
着部と、上記吸引孔以下の径の通孔を有するノズル部
と、上記ノズル部の通孔から上記ノズル部及び装着部を
貫通する通気部とを備え、上記ノズル部の通孔及び通気
部を介して上記警戒地区内とサンプリング管とを連通さ
せる口金を設け、上記口金は、通孔の径を互いに異にす
ると共に、サンプリング管の基端部側に配設される口金
の通孔の径を、先端部側に配設される口金の通孔の径よ
りも小径としたことを特徴として構成されている。In order to solve the problems in the conventional air pollution detecting device by the sampling method, the present invention according to claim 1 sucks air in the caution area into the caution area. A long sampling pipe is provided, and a plurality of suction holes for sucking the air in the caution area are formed along the longitudinal direction of the sampling pipe, and the air sucked from the suction hole is contaminated. In the air pollution detection device by the sampling method that detects the pollution status of the air in the caution area by detecting the condition with the pollution detection part provided at the proximal end of the sampling pipe, for each of the suction holes A mounting part mounted in the suction hole, a nozzle part having a through hole having a diameter equal to or smaller than the suction hole, and a ventilation part penetrating the nozzle part and the mounting part from the through hole of the nozzle part. A nozzle is provided for communicating the inside of the guard area with the sampling tube through the through hole and the ventilation section of the nozzle section, and the mouth tube has a different diameter of the through hole and the base end section of the sampling tube. It is characterized in that the diameter of the through hole of the die disposed on the side is smaller than the diameter of the through hole of the die disposed on the tip side.
【０００７】また上記請求項２に記載の本発明は、上記
請求項１に記載の本発明において、上記サンプリング管
の各吸引孔に雌ネジ部を設けると共に、上記各口金の装
着部には上記吸引孔の雌ネジ部と螺合する雄ネジ部を設
けたことを特徴として構成されている。さらに上記請求
項３に記載の本発明は、上記請求項１に記載の本発明に
おいて、上記各口金の装着部には上記サンプリング管の
吸引孔の内縁部に弾性的に係止される弾性突起を設けた
ことを特徴として構成されている。The present invention according to claim 2 is the invention according to claim 1, wherein each suction hole of the sampling tube is provided with a female screw portion, and the mounting portion of each of the mouthpieces has the above-mentioned structure. It is characterized in that a male screw portion that is screwed into the female screw portion of the suction hole is provided. Further, the present invention according to claim 3 is the invention according to claim 1, wherein the mounting portion of each of the caps is elastically engaged with an inner edge portion of the suction hole of the sampling tube. Is provided.
【０００８】[0008]
【実施例】以下、本発明たるサンプリング方式による空
気汚染検出装置の一実施例について図面を参照して詳細
に説明する。図１は本実施例の全体図、図２は図１の要
部拡大図である。これら各図において本実施例は、警戒
地区１にサンプリング管２を配し、該サンプリング管２
に複数の吸引孔６，６を形成し、各吸引孔６に口金３を
設けて構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air pollution detecting device according to the present invention, which is a sampling method, will be described in detail below with reference to the drawings. FIG. 1 is an overall view of this embodiment, and FIG. 2 is an enlarged view of a main part of FIG. In each of these drawings, in this embodiment, the sampling pipe 2 is arranged in the caution area 1, and the sampling pipe 2
A plurality of suction holes 6 and 6 are formed in each of the suction holes 6, and a mouthpiece 3 is provided in each suction hole 6.
【０００９】ここで警戒地区１とは、各種工場のクリー
ンルーム、一般家屋の居室、あるいは船舶の船倉の室内
の如き主として室内空間であり、空気の汚染状態の検出
対象となる任意の区域をいう。この警戒地区１は、図１
に示すように、本実施例においては浄化装置２０を備え
たクリーンルームとして構成されている。この浄化装置
２０は、警戒地区１の任意の複数箇所を連通するダクト
２１、該ダクト２１内に配された換気部２２、上記ダク
ト２１内の上記換気部２２の下流側に配されるフィルタ
部２３を備えており、上記警戒地区１内の空気を上記換
気部２２によってダクト２１の所定の端部より吸引し、
空気調和を行って上記フィルタ部２３を介してダクト２
１の所定の他端部より警戒地区１内に吐出するものであ
る。Here, the alert area 1 is mainly an indoor space such as a clean room of various factories, a living room of a general house, or a room of a hold of a ship, and refers to an arbitrary area which is a target of detection of an air pollution state. This warning area 1 is shown in Figure 1.
As shown in, the present embodiment is configured as a clean room including the purifying device 20. The purification device 20 includes a duct 21 that communicates with an arbitrary plurality of locations in the caution area 1, a ventilation section 22 arranged in the duct 21, and a filter section arranged in the duct 21 downstream of the ventilation section 22. 23, and sucks the air in the warning zone 1 from the predetermined end of the duct 21 by the ventilation section 22,
Air conditioning is performed and the duct 2 is passed through the filter unit 23.
The liquid is discharged from the predetermined other end of No. 1 into the warning zone 1.
【００１０】上記警戒地区１に配したサンプリング管２
は上記警戒地区１の略全長に至る長尺のもので、図３に
示すように、中空円筒部材より形成されてその内部空間
として吸引路７を有している。なお上記サンプリング管
２は中空角筒部材やその他の変形部材より形成してもよ
く、その内部に吸引路７を有するものであれば形状は限
定されない。また図１においては、このサンプリング管
２を上記警戒地区１の天井近傍に配するものとして示し
たが、本来は警戒地区１内の空気流の下流側に配される
のが望ましく、警戒地区１がクリーンルームであれば通
常は空気流が上から下へながれるため、サンプリング管
２も床近傍に配される。Sampling tube 2 arranged in the above warning area 1
Is a long length that extends to almost the entire length of the warning area 1, and as shown in FIG. 3, it is formed of a hollow cylindrical member and has a suction passage 7 as its internal space. The sampling tube 2 may be formed of a hollow rectangular tube member or other deformable member, and the shape thereof is not limited as long as it has the suction passage 7 therein. Further, in FIG. 1, the sampling pipe 2 is shown as being arranged in the vicinity of the ceiling of the caution area 1. However, it is desirable that the sampling tube 2 is originally arranged on the downstream side of the air flow in the caution area 1. In the case of a clean room, the air flow normally flows from the top to the bottom, so that the sampling tube 2 is also arranged near the floor.
【００１１】このように形成されたサンプリング管２は
その基端部を上記警戒地区１から室外へ延出させてい
る。この室外へ延出させたサンプリング管２の基端部に
は、空気の汚染度を検出する汚染検出部４と警戒地区１
内の空気を汚染検出部４に到達するように吸引する吸引
ファン５とが直列に接続されている。上記汚染検出部４
は、任意の要素で構成されてよいものであるが、本実施
例においては検煙部と回路部によって構成される（これ
らの図示は省略する）。この検煙部は、発光用レーザー
ダイオードや受光用フォトダイオードによって構成さ
れ、発光用レーザーダイオードの光軸中を煙粒子が通過
するときに発する散乱光を受光用フォトダイオードで受
光し、受光したパルスの数で煙粒子の数を計数して空気
の汚染状態を検出するものである。また回路部は、検煙
部の信号パルスを所定の時間だけ取込み、カウントする
ことによって汚染濃度を算出する。また上記吸引ファン
５も任意の要素で構成されてよいもので、所定量の警戒
地区１内の空気を汚染検出部４に到達するように吸引す
るのに十分な負圧を定常的に発生させる。The sampling tube 2 formed in this manner has its base end portion extended from the guard area 1 to the outside. At the base end of the sampling pipe 2 extended to the outside of the room, a pollution detection unit 4 for detecting the degree of air pollution and a warning area 1
A suction fan 5 that sucks the internal air to reach the contamination detection unit 4 is connected in series. The contamination detection unit 4
May be composed of arbitrary elements, but in the present embodiment, it is composed of a smoke detecting section and a circuit section (these are not shown). This smoke detector is composed of a laser diode for light emission and a photodiode for light reception, and the scattered light generated when smoke particles pass through the optical axis of the laser diode for light emission is received by the photodiode for light reception and the pulse received is received. The number of smoke particles is counted to detect the air pollution state. In addition, the circuit unit acquires the signal pulse of the smoke detection unit for a predetermined time and counts it to calculate the contamination concentration. Further, the suction fan 5 may also be constituted by any element, and constantly generates a negative pressure sufficient to suck a predetermined amount of air in the caution area 1 so as to reach the contamination detection unit 4. .
【００１２】上記サンプリング管２に形成される複数の
吸引孔６，６は、このサンプリング管２の長手方向に沿
って配されるもので、サンプリング管２の下面において
略等間隔で、かつ互いに同じ径で穿設され形成されてい
る。このように複数の吸引孔６を形成することにより、
これら各吸引孔６より上記警戒地区１内の少量の空気が
吸引され上記サンプリング管２の吸引路７内で合流し
て、合流した空気が吸引路７を通って汚染検出部４に導
かれる。なお吸引孔６の数や位置は図示のものに限られ
ず、目的とする警戒状態に応じて任意に定め得る。The plurality of suction holes 6 and 6 formed in the sampling tube 2 are arranged along the longitudinal direction of the sampling tube 2, and are arranged at substantially equal intervals on the lower surface of the sampling tube 2 and are the same as each other. It is formed so as to have a diameter. By forming the plurality of suction holes 6 in this way,
A small amount of air in the caution area 1 is sucked through each of the suction holes 6 and merges in the suction passage 7 of the sampling tube 2, and the merged air is guided to the contamination detection unit 4 through the suction passage 7. The number and position of the suction holes 6 are not limited to those shown in the figure, and can be arbitrarily determined according to the intended warning state.
【００１３】これら各吸引孔６に設ける上記口金３は、
図３・４に示すように、吸引孔６に装着される装着部８
と吸引孔６の径以下の径の通孔１７を有するノズル部９
とこれら各部を貫通する通気部１０を備える。なお、こ
こで通孔１７の径を、吸引孔６の径以下の径としたの
は、吸引孔６の径よりも大きい径としても空気を吸引す
るに際し通孔１７としての効果をなんら達成し得ないか
らである上記口金３の装着部８は短尺円筒部材から形成
したもので、その外径を上記吸引孔６の径と略等しい径
とされ、かつその高さをサンプリング管２の肉厚と略等
しい高さにされるもので、後述する種々の構造で上記吸
引孔６に装着される。The base 3 provided in each of the suction holes 6 is
As shown in FIGS. 3 and 4, the mounting portion 8 mounted in the suction hole 6
And a nozzle portion 9 having a through hole 17 having a diameter equal to or smaller than that of the suction hole 6
And a ventilation part 10 penetrating each of these parts. Here, the diameter of the through hole 17 is set to be equal to or smaller than the diameter of the suction hole 6 so that even if the diameter is larger than the diameter of the suction hole 6, the effect as the through hole 17 is achieved when air is sucked. This is because the mounting portion 8 of the mouthpiece 3 is formed from a short cylindrical member, the outer diameter of which is substantially the same as the diameter of the suction hole 6, and the height of the mounting portion 8 is the wall thickness of the sampling tube 2. The height of the suction hole 6 is approximately equal to that of the suction hole 6.
【００１４】またノズル部９は、上記装着部８と一体に
形成され、あるいは装着部８と別体に形成された後に該
装着部８の一端部に接続されるもので、この装着部８か
ら突出する略円錐部材として形成されている。上記通気
部１０は、図３に示すように、上記装着部８とノズル部
９とを貫通する略均一径の貫通孔で、ノズル部９の外側
端部から装着部８の内側端部にまで至り、警戒地区１内
とサンプリング管２とを連通する。このように通気部１
０がノズル部９を貫通して形成されることにより、この
通気部１０の上記ノズル部９内における最も狭い部分と
して通孔１７が形成されている。なお特に図示は省略す
るが、上記ノズル部９の内部に種々のバルブやスライド
ゲートを備え、これらバルブ等による被調節部として上
記通孔１７を形成してもよく、この場合には通気部１０
やノズル部９自体を作り変えることなく通孔１７を任意
の径にできる。The nozzle portion 9 is formed integrally with the mounting portion 8 or is formed separately from the mounting portion 8 and then connected to one end of the mounting portion 8. It is formed as a substantially conical protruding member. As shown in FIG. 3, the ventilation part 10 is a through hole having a substantially uniform diameter that penetrates the mounting part 8 and the nozzle part 9, and extends from the outer end part of the nozzle part 9 to the inner end part of the mounting part 8. Then, the inside of the caution area 1 and the sampling tube 2 are connected. In this way the ventilation part 1
By forming 0 through the nozzle portion 9, the through hole 17 is formed as the narrowest portion of the ventilation portion 10 in the nozzle portion 9. Although not shown in the drawings, various nozzles and slide gates may be provided inside the nozzle portion 9, and the through hole 17 may be formed as an adjusted portion by these valves or the like.
The diameter of the through hole 17 can be set to an arbitrary diameter without modifying the nozzle portion 9 itself.
【００１５】ここで、上記各口金３はそのノズル部９の
通孔１７の径を互いに異にすると共に、上記サンプリン
グ管２の基端部側に配設される口金３Ａのノズル部９Ａ
の通孔１７Ａを先端部側に配設される口金３Ｃのノズル
部９Ｃの通孔１７Ｃよりも小径としてなる。すなわち各
口金３のノズル部９の通孔１７は、基端部側に配設され
るものほど小径となるようにされており、図２に示すよ
うに、サンプリング管２の基端部側に配設される口金３
Ａのノズル部９Ａの通孔１７Ａの径をＬ3 、先端部側に
配設される口金３Ｃのノズル部９Ｃの通孔１７Ｃの径を
Ｌ1 、これらの中間に配設される口金３Ｂのノズル部９
Ｂの通孔１７Ｂの径をＬ2 とすれば、これら通孔１７
Ａ、１７Ｂ、１７Ｃの各径はＬ1 ＞Ｌ2 ＞Ｌ3 なる関係
が成立つように定められている。Here, in each of the mouthpieces 3, the diameters of the through holes 17 of the nozzle portion 9 are different from each other, and the nozzle portion 9A of the mouthpiece 3A arranged on the base end side of the sampling tube 2 is provided.
The through hole 17A has a smaller diameter than the through hole 17C of the nozzle portion 9C of the mouthpiece 3C disposed on the tip end side. That is, the through hole 17 of the nozzle portion 9 of each mouthpiece 3 has a smaller diameter as it is arranged on the base end side, and as shown in FIG. Disposed base 3
The diameter of the through hole 17A of the nozzle portion 9A of A is L 3 , the diameter of the through hole 17C of the nozzle portion 9C of the mouthpiece 3C disposed on the tip side is L 1 , and the diameter of the mouthpiece 3B disposed between these is 3 Nozzle part 9
If the diameter of the B through hole 17B is L 2 , these through holes 17
The diameters of A, 17B, and 17C are determined so that the relationship of L 1 > L 2 > L 3 is established.
【００１６】ここで、基端部側の口金３Ａの通孔１７Ａ
を先端部側の口金３Ｃの通孔１７Ｃよりどの程度小径と
するかは、サンプリング管２の長さ及び径、各吸引孔６
の数及び位置等の諸条件により異なるが、基端部側の口
金３Ａの通孔１７Ａを介して吸引した警戒地区１の空気
の量と先端部側の口金３Ｃの通孔１７Ｃを介して吸引し
た警戒地区１の空気の量が略等しくなるように定められ
る。具体的には、各吸引孔６における空気の吸引量Ｑは
Ｑ＝Ｋ・Ｓ・√Ｐで表されるので（Ｋは定数、Ｓは吸引
面積、√Ｐは差圧）、Ｑが同一となるようなＳを求め、
このＳに合致するように各口金３の通孔１７の径が定め
られる。Here, the through hole 17A of the base 3A on the base end side
The diameter of the sampling tube 2 and the diameter of the suction hole 6C of the sampling pipe 2 are determined to be smaller than the diameter of the through hole 17C of the tip side cap 3C.
The amount of air in the caution area 1 sucked through the through hole 17A of the mouthpiece 3A on the base end side and the through hole 17C of the mouthpiece 3C on the tip end side, although it depends on various conditions such as the number and position of The amount of air in the warning area 1 is set to be approximately equal. Specifically, since the air suction amount Q in each suction hole 6 is represented by Q = K · S · √P (K is a constant, S is a suction area, and √P is a differential pressure), Q is the same. For S such that
The diameter of the through hole 17 of each base 3 is determined so as to match this S.
【００１７】このように、上記吸引孔６の各々に対し、
該吸引孔６に装着される装着部８と、上記吸引孔６以下
の径の通孔１７を有するノズル部９と、上記ノズル部９
の通孔１７から上記ノズル部９及び装着部８を貫通する
通気部１０とを備え、上記ノズル部９の通孔１７及び通
気部１０を介して上記警戒地区１内とサンプリング管２
とを連通させる口金３を設け、上記口金３は、上記通孔
１７の径を互いに異にすると共に、上記サンプリング管
２の基端部側に配設される口金３の通孔１７の径を、先
端部側に配設される口金３の通孔１７の径よりも小径と
したので、先端部側の口金３Ｃのノズル部９Ｃの通孔１
７Ｃにおける吸引抵抗を基端部側のものより小さくで
き、この吸引抵抗の差により先端部側の吸引孔６Ｃと基
端部側の吸引孔６Ａとの間の差圧を解消でき各吸引孔６
から吸引する空気の量を同じにできるので、吸引孔６個
々への加工を施すことなく検出感度の一定化を図れる。Thus, for each of the suction holes 6,
A mounting portion 8 mounted in the suction hole 6, a nozzle portion 9 having a through hole 17 having a diameter equal to or smaller than the suction hole 6, and the nozzle portion 9
And a ventilation part 10 penetrating the nozzle part 9 and the mounting part 8 from the through hole 17 of the nozzle part 9 through the through hole 17 and the ventilation part 10 of the nozzle part 9 and the sampling area 2
And a diameter of the through hole 17 of the mouthpiece 3 arranged on the base end side of the sampling tube 2 is different from each other. Since the diameter is smaller than the diameter of the through hole 17 of the mouthpiece 3 arranged on the tip side, the through hole 1 of the nozzle portion 9C of the tip 3C of the tip side is formed.
The suction resistance at 7C can be made smaller than that at the base end side, and the pressure difference between the suction hole 6C at the tip end side and the suction hole 6A at the base end side can be eliminated by this difference in suction resistance.
Since the amount of air sucked from the suction holes 6 can be the same, the detection sensitivity can be made constant without processing the suction holes 6 individually.
【００１８】上記のように構成される口金３は、種々の
構造で上記各吸引孔６へ装着されるものであり、以下こ
の口金３の各吸引孔６への装着の構造について説明す
る。図３・４において、上記各吸引孔６の内周の略全面
には雌螺子部１１が形成されており、また上記口金３の
装着部８にはその外周の略全面に上記吸引孔６の雌ネジ
部１１とある程度の気密性を有するように螺合する雄ネ
ジ部１４が設けられている。すなわち装着部８の外周の
雄ネジ部１４を吸引孔６の雌ネジ部１１にねじ込むこと
によりこの装着部８が吸引孔６に装着され、ひいては口
金３が吸引孔６に装着される。The mouthpiece 3 constructed as described above is attached to the suction holes 6 with various structures. The structure of attaching the mouthpiece 3 to the suction holes 6 will be described below. 3 and 4, female screw portions 11 are formed on substantially the entire inner surface of the suction holes 6, and the mounting portion 8 of the mouthpiece 3 has the suction holes 6 formed on the substantially entire outer surface thereof. A male screw portion 14 that is screwed with the female screw portion 11 so as to have airtightness to some extent is provided. That is, by screwing the male screw portion 14 on the outer periphery of the mounting portion 8 into the female screw portion 11 of the suction hole 6, the mounting portion 8 is mounted in the suction hole 6, and by extension, the base 3 is mounted in the suction hole 6.
【００１９】このようにサンプリング管２の各吸引孔６
に雌ネジ部１１を設けると共に、上記各口金３の装着部
８には上記吸引孔６の雌ネジ部１１と螺合する雄ネジ部
１４を設けた場合には、この装着部８を先頭として口金
３を吸引孔６に押当ててねじ込むだけで装着部８の雄ネ
ジ部１４が吸引孔６の雌ネジ部１１と螺合して口金を吸
引孔６に気密装着でき、特別な工具を何ら用いることな
く口金３を非常に容易に装着できる。In this way, each suction hole 6 of the sampling tube 2 is
When the female screw portion 11 is provided on the mounting portion 8 of each of the mouthpieces 3 and the male screw portion 14 that engages with the female screw portion 11 of the suction hole 6 is provided on the mounting portion 8, the mounting portion 8 is used as a head. By simply pressing the base 3 into the suction hole 6 and screwing it in, the male screw portion 14 of the mounting portion 8 is screwed into the female screw portion 11 of the suction hole 6 so that the base can be hermetically mounted in the suction hole 6, and no special tool is required. The base 3 can be attached very easily without using it.
【００２０】さらに他の装着構造の他の例について説明
する。図５・６に示すのは、上記口金３の装着部８に上
記サンプリング管２の吸引孔６の内縁部１２に弾性的に
係止される弾性突起１５を設けた例である。この弾性突
起１５は上記装着部８の外側面の全周に渡り形成される
もので、上記吸引孔６の孔径より若干大きい径で形成さ
れており、上記サンプリング管２の吸引路７内において
上記吸引孔６の内縁部１２に係止している。なおこの弾
性突起１５は、ゴム材や硬質スポンジからなる。Another example of still another mounting structure will be described. 5 and 6 show an example in which the mounting portion 8 of the mouthpiece 3 is provided with an elastic protrusion 15 which is elastically locked to the inner edge portion 12 of the suction hole 6 of the sampling tube 2. The elastic projection 15 is formed over the entire circumference of the outer side surface of the mounting portion 8, has a diameter slightly larger than the diameter of the suction hole 6, and is formed in the suction passage 7 of the sampling tube 2 as described above. It is locked to the inner edge portion 12 of the suction hole 6. The elastic protrusions 15 are made of rubber material or hard sponge.
【００２１】このように各口金３の装着部８には上記サ
ンプリング管２の吸引孔６の内縁部１２に弾性的に係止
される弾性突起１５を設けた場合には、口金３を装着部
８を先頭として上記吸引孔６に押圧しただけで弾性突起
１５が小径状に変形して吸引孔６を挿通すると共に、挿
通後に弾性復帰して吸引孔６の内縁部１２に自動的に係
止されるので、何ら特別な工具を用いることなく口金３
の装着作業を非常に容易に行うことができる。As described above, when the mounting portion 8 of each base 3 is provided with the elastic projection 15 which is elastically locked to the inner edge portion 12 of the suction hole 6 of the sampling tube 2, the base 3 is mounted. The elastic projection 15 is deformed into a small diameter and is inserted through the suction hole 6 only by pressing the suction hole 6 with 8 as the head, and after the insertion, the elastic projection 15 is elastically restored and automatically locked to the inner edge portion 12 of the suction hole 6. Therefore, the base 3 can be used without using any special tools.
The mounting work of can be performed very easily.
【００２２】さらに他の装着構造の例について説明す
る。図７・８に示すのは、上記サンプリング管２の吸引
孔６の周囲部に嵌合溝１３を切設すると共に、この嵌合
溝１３に挿通する連係杆１６を上記口金３の装着部８に
突設したものである。上記嵌合溝１３は吸引孔６の周面
や下面に開放するように形成されるもので、この吸引孔
６の下面から傾斜部を介して吸引孔６の上面近傍の水平
部に至るものとされており、その内部に口金３の装着部
８の連係杆１６を挿通させその水平部に載置自在として
いる。このように上記サンプリング管２の吸引孔６の内
周に嵌合溝１３を切設し、この嵌合溝１３に嵌合する連
係杆１６を上記口金３の装着部８に突設した場合には、
この連係杆１６を上記嵌合溝１３に挿通させつつ口金３
を所定の方向に回転させるだけで嵌合溝１３に連係杆１
６を載置させることができ、この連係杆１６を介して口
金３を吸引孔６に装着できるので、何ら特別な工具を用
いることなく口金３の装着作業を非常に容易に行うこと
ができる。Another example of the mounting structure will be described. 7 and 8 show that a fitting groove 13 is cut around the suction hole 6 of the sampling tube 2, and a linking rod 16 inserted into the fitting groove 13 is attached to the fitting portion 8 of the base 3. It is the one protruding from. The fitting groove 13 is formed so as to open to the peripheral surface and the lower surface of the suction hole 6, and extends from the lower surface of the suction hole 6 to the horizontal portion near the upper surface of the suction hole 6 via the inclined portion. The linking rod 16 of the mounting portion 8 of the base 3 is inserted into the inside thereof and can be placed on the horizontal portion thereof. In this way, when the fitting groove 13 is cut on the inner circumference of the suction hole 6 of the sampling tube 2 and the linking rod 16 fitted in the fitting groove 13 is projected on the mounting portion 8 of the base 3. Is
While allowing the linking rod 16 to be inserted into the fitting groove 13, the base 3
Is rotated in a predetermined direction, the linkage rod 1 is engaged with the fitting groove 13.
6 can be placed, and the mouthpiece 3 can be attached to the suction hole 6 through the linking rod 16. Therefore, the attaching work of the mouthpiece 3 can be performed very easily without using any special tool.
【００２３】なお上記のように嵌合溝１３を切設するも
のとは若干異なる例として（図示は省略する）、上記吸
引孔６の縁部を貫通するように縦溝たる嵌合溝１３を切
設すると共に、この嵌合溝１３に挿通する連係杆１６を
上記口金３の装着部８に突設すようにしてもよい。この
場合には連係杆１６を吸引孔６の嵌合溝１３に挿通させ
てサンプリング管２の吸引路７に位置させ、その後に口
金３を回転させて連係杆１６を吸引孔６の上縁部に載置
させることにより口金３が上記各吸引孔６へ装着され、
やはり何ら特別な工具を用いることなく口金３の装着作
業を容易に行うことができる。As an example (not shown) slightly different from the case where the fitting groove 13 is cut as described above, a fitting groove 13 which is a vertical groove is formed so as to penetrate the edge portion of the suction hole 6. The linking rod 16 may be cut and inserted into the fitting groove 13 so as to project from the mounting portion 8 of the base 3. In this case, the linking rod 16 is inserted into the fitting groove 13 of the suction hole 6 so as to be positioned in the suction path 7 of the sampling tube 2, and then the mouthpiece 3 is rotated to move the linking rod 16 to the upper edge portion of the suction hole 6. The base 3 is mounted on the suction holes 6 by mounting
After all, the attachment work of the base 3 can be easily performed without using any special tool.
【００２４】[0024]
【発明の効果】上記したように請求項１の本発明は、サ
ンプリング方式による空気汚染検出装置において、吸引
孔の各々に対し、該吸引孔に装着される装着部と、上記
吸引孔以下の径の通孔を有するノズル部と、上記ノズル
部の通孔から上記ノズル部及び装着部を貫通する通気部
とを備え、上記ノズル部の通孔及び通気部を介して上記
警戒地区内とサンプリング管とを連通させる口金を設
け、上記口金は、上記通孔の径を互いに異にすると共
に、上記サンプリング管の基端部側に配設される口金の
通孔の径を、先端部側に配設される口金の通孔の径より
も小径としたので、先端部側の口金のノズル部の通孔に
おける吸引抵抗を基端部側のものより小さくでき、この
吸引抵抗の差により先端部側の吸引孔と基端部側の吸引
孔との間の差圧を解消できて各吸引孔から吸引する空気
の量を同じにでき、吸引孔個々への加工を施すことなく
容易に検出感度の一定化を図れるという効果がある。As described above, according to the first aspect of the present invention, in the air pollution detection device by the sampling method, for each of the suction holes, a mounting portion mounted in the suction hole and a diameter equal to or smaller than the suction hole. A nozzle part having a through hole and a ventilation part penetrating the nozzle part and the mounting part from the through hole of the nozzle part, and the inside of the caution area and the sampling pipe through the through hole and the ventilation part of the nozzle part. And a diameter of the through hole of the mouthpiece arranged on the base end side of the sampling tube is arranged on the tip side. Since the diameter is smaller than the diameter of the through hole of the base to be installed, the suction resistance in the through hole of the nozzle of the base on the tip side can be made smaller than that of the base side, and due to this difference in suction resistance, the tip side Eliminates the differential pressure between the suction hole on the base and the suction hole on the base end side Can the amount of air sucked from the intake holes come to the same, there is an effect that attained a constant of readily detectable sensitivity without performing processing into suction holes individually.
【００２５】さらに請求項２の本発明は、サンプリング
管の各吸引孔に雌ネジ部を設けると共に、各口金の装着
部に吸引孔の雌ネジ部と螺合する雄ネジ部を設けた場合
には、装着部を先頭として口金を吸引孔に押当ててねじ
込むだけで装着部の雄ネジ部が吸引孔の雌ネジ部と螺合
して口金を吸引孔に装着でき、特別な工具を何ら用いる
ことなく口金を非常に容易に装着できる。Further, according to the present invention of claim 2, when a female screw portion is provided in each suction hole of the sampling tube, and a male screw portion which is screwed with the female screw portion of the suction hole is provided in a mounting portion of each mouthpiece. With the mounting part as the head, the male screw part of the mounting part can be screwed into the female screw part of the suction hole by simply pushing the base into the suction hole and screwing in, and the base can be mounted in the suction hole, and no special tool is used. The base can be installed very easily without.
【００２６】しかも請求項３の本発明は、各口金の装着
部にはサンプリング管の吸引孔の内縁部に弾性的に係止
される弾性突起を設けた場合には、口金を装着部を先頭
として吸引孔に押圧しただけで弾性突起が小径状に変形
して吸引孔を挿通すると共に、挿通後に弾性復帰して吸
引孔の内縁部に自動的に係止されるので、何ら特別な工
具を用いることなく口金の装着作業を非常に容易に行う
ことができる。Further, according to the present invention of claim 3, in the case where the mounting portion of each mouthpiece is provided with an elastic protrusion which is elastically locked to the inner edge portion of the suction hole of the sampling tube, the mouthpiece is mounted first. As the elastic projection is deformed into a small diameter and is inserted through the suction hole just by pressing it into the suction hole, it elastically returns after insertion and is automatically locked to the inner edge of the suction hole. The work of attaching the base can be performed very easily without using it.
【図１】本発明の全体図である。FIG. 1 is an overall view of the present invention.
【図２】図１の要部拡大図である。FIG. 2 is an enlarged view of a main part of FIG.
【図３】図２の要部断面図である。3 is a cross-sectional view of the main parts of FIG.
【図４】図３の分解斜視図である。FIG. 4 is an exploded perspective view of FIG.
【図５】口金の装着部に弾性突起を設けた場合における
図２の要部断面図である。5 is a cross-sectional view of the main parts of FIG. 2 when an elastic protrusion is provided on the mounting portion of the base.
【図６】図５の分解斜視図である。FIG. 6 is an exploded perspective view of FIG.
【図７】口金の装着部に連係杆を設けた場合における図
２の要部断面図である。FIG. 7 is a cross-sectional view of the main parts of FIG. 2 in the case where a linking rod is provided in the mounting portion of the base.
【図８】図７の分解斜視図である。FIG. 8 is an exploded perspective view of FIG. 7.
１ 警戒地区 ２ サンプリング管 ３ 口金 ４ 汚染検出部 ５ 吸引ファン ６ 吸引孔 ７ 吸引路 ８ 装着部 ９ ノズル部 １０ 通気部 １１ 雌ネジ部 １２ 内縁部 １３ 嵌合溝 １４ 雄ネジ部 １５ 弾性突起 １６ 連係杆 １７ 通孔 ２０ 浄化装置 ２１ ダクト部 ２２ 換気部 ２３ フィルタ部 1 Warning area 2 Sampling tube 3 Base 4 Contamination detection part 5 Suction fan 6 Suction hole 7 Suction path 8 Mounting part 9 Nozzle part 10 Ventilation part 11 Female screw part 12 Inner edge part 13 Fitting groove 14 Male screw part 15 Elastic protrusion 16 Linkage Rod 17 Through hole 20 Purification device 21 Duct part 22 Ventilation part 23 Filter part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 洌 東京都品川区上大崎二丁目10番43号 ホー チキ株式会社内 (72)発明者 香川 利春 神奈川県川崎市高津区下作延928−４ 梶 ヶ谷パークハイツ306 (72)発明者 遠藤 一郎 東京都品川区上大崎二丁目10番43号 ホー チキ株式会社内 (72)発明者 宮尾 幸衛 東京都品川区上大崎二丁目10番43号 ホー チキ株式会社内 (72)発明者 中井 健人 東京都品川区上大崎二丁目10番43号 ホー チキ株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Satoshi Watanabe 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Within Ho Chiki Co., Ltd. (72) Inventor Toshiharu Kagawa 928-4 Shimosakuen, Takatsu-ku, Kawasaki, Kanagawa Tani Park Heights 306 (72) Inventor Ichiro Endo 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Ho Chiki Co., Ltd. (72) Koue Miyao 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Ho Chiki Shares In-house (72) Inventor Kento Nakai 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Within Ho Chiki Co., Ltd.
Claims (3)
るための長尺のサンプリング管を配すると共に、該サン
プリング管に対しその長手方向に沿って上記警戒地区内
の空気を吸引するための複数の吸引孔を形成し、該吸引
孔から吸引した空気の汚染状態を上記サンプリング管の
基端部に設けた汚染検出部にて検出することにより、上
記警戒地区内の空気の汚染状態を検出するサンプリング
方式による空気汚染検出装置において、 上記吸引孔の各々に対し、該吸引孔に装着される装着部
と、上記吸引孔以下の径の通孔を有するノズル部と、上
記ノズル部の通孔から上記ノズル部及び装着部を貫通す
る通気部とを備え、上記ノズル部の通孔及び通気部を介
して上記警戒地区内とサンプリング管とを連通させる口
金を設け、 上記口金は、上記通孔の径を互いに異にすると共に、上
記サンプリング管の基端部側に配設される口金の通孔の
径を、先端部側に配設される口金の通孔の径よりも小径
としたことを特徴とするサンプリング方式による空気汚
染検出装置。1. A long sampling tube for sucking air in the warning zone is arranged in the warning zone, and air in the warning zone is sucked along the longitudinal direction of the sampling tube. By forming a plurality of suction holes, the contamination state of the air sucked from the suction holes is detected by the contamination detection unit provided at the proximal end of the sampling tube, thereby detecting the contamination state of the air in the caution area. In an air pollution detection device using a sampling method for detecting, for each of the suction holes, a mounting portion mounted in the suction hole, a nozzle portion having a through hole having a diameter equal to or smaller than the suction hole, and a passage of the nozzle portion. A nozzle for penetrating the nozzle part and the mounting part from the hole, and a cap for connecting the inside of the caution area and the sampling pipe through the hole and the vent part of the nozzle part is provided. Hole The diameters of the bases of the sampling tubes are different from each other, and the diameter of the base of the sampling tube is smaller than the diameter of the base of the base. An air pollution detection device with a characteristic sampling method.
を設けると共に、上記各口金の装着部に上記吸引孔の雌
ネジ部と螺合する雄ネジ部を設けたことを特徴とする上
記請求項１に記載のサンプリング方式による空気汚染検
出装置。2. The suction hole of the sampling tube is provided with a female screw portion, and the mounting portion of each of the mouthpieces is provided with a male screw portion which is screwed into the female screw portion of the suction hole. An air pollution detection device according to item 1, which uses the sampling method.
グ管の吸引孔内縁部に弾性的に係止される弾性突起を設
けたことを特徴とする上記請求項１に記載のサンプリン
グ方式による空気汚染検出装置。3. The air according to claim 1, wherein an elastic protrusion elastically engaged with an inner edge portion of the suction hole of the sampling tube is provided in a mounting portion of each of the mouthpieces. Pollution detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6337886A JP2977119B2 (en) | 1994-12-27 | 1994-12-27 | Air pollution detector by sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6337886A JP2977119B2 (en) | 1994-12-27 | 1994-12-27 | Air pollution detector by sampling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08184534A true JPH08184534A (en) | 1996-07-16 |
| JP2977119B2 JP2977119B2 (en) | 1999-11-10 |
Family
ID=18312928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6337886A Expired - Fee Related JP2977119B2 (en) | 1994-12-27 | 1994-12-27 | Air pollution detector by sampling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2977119B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007142235A (en) * | 2005-11-21 | 2007-06-07 | Seiko Epson Corp | Semiconductor device manufacturing equipment and method for managing the same |
| CN103674631A (en) * | 2014-01-08 | 2014-03-26 | 国家电网公司 | Dual-pump flow-equalizing flue sampling device and sampling method |
| CN107966331A (en) * | 2017-10-23 | 2018-04-27 | 中国科学院东北地理与农业生态研究所 | The harvester and method that field test soil-plant system organic pollution soil-gas exchanges |
-
1994
- 1994-12-27 JP JP6337886A patent/JP2977119B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007142235A (en) * | 2005-11-21 | 2007-06-07 | Seiko Epson Corp | Semiconductor device manufacturing equipment and method for managing the same |
| CN103674631A (en) * | 2014-01-08 | 2014-03-26 | 国家电网公司 | Dual-pump flow-equalizing flue sampling device and sampling method |
| CN107966331A (en) * | 2017-10-23 | 2018-04-27 | 中国科学院东北地理与农业生态研究所 | The harvester and method that field test soil-plant system organic pollution soil-gas exchanges |
| CN107966331B (en) * | 2017-10-23 | 2020-08-14 | 中国科学院东北地理与农业生态研究所 | Collection system for testing soil-plant system organic pollutant soil-gas exchange |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2977119B2 (en) | 1999-11-10 |
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