JPS6139971Y2 - - Google Patents
Info
- Publication number
- JPS6139971Y2 JPS6139971Y2 JP1980085670U JP8567080U JPS6139971Y2 JP S6139971 Y2 JPS6139971 Y2 JP S6139971Y2 JP 1980085670 U JP1980085670 U JP 1980085670U JP 8567080 U JP8567080 U JP 8567080U JP S6139971 Y2 JPS6139971 Y2 JP S6139971Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- gas
- cylinder
- rod
- hole
- 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
- 230000007423 decrease Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 49
- 238000002485 combustion reaction Methods 0.000 description 10
- 235000014676 Phragmites communis Nutrition 0.000 description 6
- 238000005192 partition Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【考案の詳細な説明】
本考案は燃焼器具等に安全装置として供し得る
ガス流感知器に関する。[Detailed Description of the Invention] The present invention relates to a gas flow sensor that can be used as a safety device for combustion appliances and the like.
従来よりガス燃焼器具の安全装置については、
炎部の燃焼状態、特に温度の検出を以つて行うも
のが主流であつた。然し乍らこの種装置では、ガ
ス源から器具に至る間の事故に関しては直接感知
することは不可能であり、時には大惨時を招くこ
とにもなりかねない。例示すれば、ガス配管若し
くはホース等が損傷しガスが漏洩しているようで
あつても、燃焼部の炎はある程度正常であるよう
な場合が想定され、このような場合は至急ガス源
を遮断する必要があろう。本考案は上記問題を解
決する為になされたものであり、ガス配管、ホー
ス等のガス流の変化を素早く感知し、これに対応
した信号を発生し得るガス流感知器を提供するこ
とを目的とする。これを達成する為本考案では、
筐体シリンダー内にロツドを連結したピストンを
内蔵させると共に、ピストンで分割されたシリン
ダーの両側をガス流通路により連通させ、このガ
ス流通路に燃焼用ガスを流すことによりピストン
内外面にガス流入側及び流出側の圧力を負荷し、
この内外面の負荷圧力の差圧が変化するのに伴つ
てシリンダー内でピストンがロツドと一体となつ
て摺動するようなし、これを以つてガス流の変化
を検出するようにしたことを基本的な構成とす
る。 Regarding safety devices for gas combustion appliances,
The mainstream method was to detect the combustion state of the flame, especially the temperature. However, with this type of device, it is impossible to directly detect accidents between the gas source and the appliance, and this can sometimes lead to a catastrophe. For example, even if gas piping or hoses are damaged and gas appears to be leaking, it is assumed that the flame in the combustion section is somewhat normal, and in such a case, the gas source should be immediately shut off. It would be necessary to do so. The present invention was made to solve the above problem, and the purpose is to provide a gas flow sensor that can quickly detect changes in gas flow in gas piping, hoses, etc. and generate a corresponding signal. shall be. In order to achieve this, in this invention,
A piston connected to a rod is built into the housing cylinder, and both sides of the cylinder divided by the piston are communicated through a gas flow passage, and by flowing combustion gas through this gas flow passage, a gas inflow side is created on the inner and outer surfaces of the piston. and load the pressure on the outflow side,
The basic idea is that as the differential pressure between the inner and outer surfaces changes, the piston slides together with the rod inside the cylinder, and this is used to detect changes in the gas flow. The structure is as follows.
以下添付図面に示す望ましい実施例に従い本考
案を詳述する。第１図は本考案感知器の一実施例
の内部状態を示す正面図であり、図中１０は筐
体、３０はピストン、３５はロツドを示し、４０
及び４１は本考案感知器に付設されたリードスイ
ツチ機構を構成するマグネツト及びホルダーを示
す。筐体１０は横長形状の本体１１と、その両端
を閉鎖するフランジ１２及び１３とで構成され
る。本体１１は内部の略中央長手方向にシリンダ
ー１６と、その下方に隔壁２０により分離された
ガス流通路１７と、本体１１側方からシリンダー
１６下部内面に至るＬ字状に穿設されたガス流入
孔１８と、該通路１７の下方に穿設されたガス流
出孔１９とを備える。ピストン３０は図示の如く
横長手のシリンダー１６内に緊密状態で内蔵さ
れ、従つてシリンダー１６の長手方向に沿つて、
即ち水平方向に摺動可能となつている。隔壁２０
には第２図に明瞭に示されるように、先細形状の
孔即ちスリツト２１と孔２２が穿設されており、
その為ピストン３０により分割されたシリンダー
１６の内部は該通路１７により連通している。 The present invention will be described in detail below according to preferred embodiments shown in the accompanying drawings. FIG. 1 is a front view showing the internal state of one embodiment of the sensor of the present invention, in which 10 is a housing, 30 is a piston, 35 is a rod, and 40
and 41 indicate a magnet and a holder constituting the reed switch mechanism attached to the sensor of the present invention. The housing 10 is composed of a horizontally long main body 11 and flanges 12 and 13 that close both ends of the main body 11. The main body 11 includes a cylinder 16 in the longitudinal direction approximately at the center thereof, a gas flow passage 17 separated by a partition wall 20 below the cylinder 16, and an L-shaped gas inflow passage extending from the side of the main body 11 to the inner surface of the lower part of the cylinder 16. A hole 18 and a gas outlet hole 19 bored below the passage 17 are provided. As shown, the piston 30 is tightly housed within the horizontally elongated cylinder 16, and therefore, along the longitudinal direction of the cylinder 16,
That is, it is capable of sliding in the horizontal direction. Partition wall 20
As clearly shown in FIG. 2, a tapered hole, that is, a slit 21 and a hole 22 are bored in the hole.
Therefore, the interior of the cylinder 16 divided by the piston 30 is communicated through the passage 17.
フランジ１２及び１３は本体１１に嵌合の後通
常の螺子部材（図示せず）で締付結合を行うもの
で、シール性を高める為両嵌合部にパツキング１
４を装着してある。フランジ１２は中心にロツド
３５を貫通させる孔２３を有し、更に嵌合部側に
延設されたシリンダー１６と同心円環状のストツ
パー２４を具備する。該孔２３とロツド３５との
間にはシールオイル１５を注入し、ガス漏洩を防
ぐ。一方フランジ１３も嵌合部側中心にシリンダ
ー１６の内方に向つて延設された棒状のストツパ
ー２５を具備する。ストツパー２５は、ピストン
３０が図中最左方に移動した場合に自己の外周面
により孔２２を遮蔽してガス流の変化に追従でき
なくなるのを防止する。 After the flanges 12 and 13 are fitted to the main body 11, they are fastened together using ordinary screw members (not shown), and packing 1 is provided at both fitting parts to improve sealing performance.
4 is installed. The flange 12 has a hole 23 in the center through which the rod 35 passes, and is further provided with an annular stopper 24 concentric with the cylinder 16 extending toward the fitting portion. Seal oil 15 is injected between the hole 23 and the rod 35 to prevent gas leakage. On the other hand, the flange 13 is also provided with a rod-shaped stopper 25 extending inward of the cylinder 16 at the center of the fitting portion side. The stopper 25 prevents the piston 30 from being unable to follow changes in the gas flow by blocking the hole 22 with its outer peripheral surface when the piston 30 moves to the leftmost position in the figure.
ロツド３５は、ガス流入側のピストン３０外端
面３１に同軸状に連結され、その先端は上記孔２
３より突出する。該先端部にはマグネツト４０が
付設されており、従つてマグネツト４０はピスト
ン３０の摺動に伴つてリードスイツチ群４２，４
３を備えたホルダー４１内を移動する。 The rod 35 is coaxially connected to the outer end surface 31 of the piston 30 on the gas inflow side, and its tip ends in the hole 2.
More prominent than 3. A magnet 40 is attached to the tip, and as the piston 30 slides, the magnet 40 moves the reed switch groups 42, 4.
3 in the holder 41.
以下に上記構成による本考案感知器の作動態様
を示す。ガス流体は第１図からも明らかなよう
に、流入孔１８−シリンダー１６−スリツト２１
−通路１７−流出孔１９の順で筐体１０内を流れ
る。この時ピストン３０の外端面３１は軸方向に
ガス流体の流入側（一次側）の圧力を受け、内面
３２は軸方向に背圧である流出側（二次側）の圧
力を受ける。従つて外端面３１の軸方向に受ける
力をＦA、内面３２の軸方向に受ける力をＦBとす
ると、この両者は
ＦA＝π（Ｄ２−ｄ２）／４・ｐ
ＦB＝πＤ２／４・P′
ただしＰ：一次側圧力、P′：二次側圧力、
Ｄ：シリンダー１６の断面直径
ｄ：ロツド３５の直径
と表わされる。ＦA＝ＦBの時ピストン３０は停止
状態にあるが、正常なガス流の範囲に於いては略
シリンダー１６中央付近でこの状態を維持するよ
うに予め設計しておく。 The operating mode of the sensor of the present invention with the above configuration will be shown below. As is clear from FIG. 1, the gas fluid flows through the inflow hole 18 - cylinder 16 - slit 21
- Passage 17 - Outflow hole 19 flows through the housing 10 in this order. At this time, the outer end surface 31 of the piston 30 receives pressure on the inflow side (primary side) of the gas fluid in the axial direction, and the inner surface 32 receives pressure on the outflow side (secondary side), which is back pressure, in the axial direction. Therefore, if the force received in the axial direction of the outer end surface 31 is F A and the force received in the axial direction of the inner surface 32 is F B , both of them are F A =π(D 2 - d 2 )/4·p F B = πD 2 /4·P' where P: primary side pressure, P': secondary side pressure, D: cross-sectional diameter of cylinder 16, d: diameter of rod 35. When F A =F B , the piston 30 is in a stopped state, but the piston 30 is designed in advance to maintain this state approximately near the center of the cylinder 16 within a normal gas flow range.
ＦA＞ＦBの時、即ちガス流出側の背圧が低下し
た場合、例えば燃焼器具の弁の開度を大にして使
用するような時、ピストン３０は図中左方に移動
してスリツト２１の開放部分を増加させ、それに
対応したガス流量を燃焼器具に供給する。その結
果ガス流量は増加して背圧が高まる為ピストン３
０は平衡状態即ちＦA＝ＦBの状態におかれる迄移
動した後停止する。この様な状況は特に燃焼器具
の使用開始時に想定されるもので、器具の不使用
時には第１図中最右方に位置するピストン３０
（なぜなら器具の不使用時はピストン３０の内外
面の負荷圧力Ｐ，P′は等しい為ＦA＜ＦBとなり、
従つてピストン３０はこの状態においてストツパ
ー２４と衝合している）は、器具の弁の開放に従
つてＦA＞ＦBの状態におかれ、速やかに図中左方
に移動し、ＦA＝ＦBとなつた時点で停止する。然
し乍ら極端に背圧が低下した場合、例えばガス配
管が損傷してガスが漏洩しているような時、ピス
トン３０はストツパー２５により停止されるまで
左方に移動し、その結果ピストン３０と一体とな
つて移動するロツド３５に付設されたリードスイ
ツチ４３が閉成され、連係の装置（図示せず）に
信号を送りこれを作動させてガス源を遮断する。 When F A > F B , that is, when the back pressure on the gas outlet side decreases, for example when the valve of a combustion appliance is used with a large opening, the piston 30 moves to the left in the figure and closes the slit. 21 to supply a corresponding gas flow rate to the combustion appliance. As a result, the gas flow rate increases and the back pressure increases, so the piston 3
0 moves until it reaches an equilibrium state, ie, a state where F A =F B , and then stops. Such a situation is expected especially when starting to use a combustion appliance, and when the appliance is not in use, the piston 30 located at the far right in FIG.
(Because when the instrument is not in use, the load pressures P and P' on the inner and outer surfaces of the piston 30 are equal, so F A < F B ,
Therefore, the piston 30 (in this state is in abutment with the stopper 24) is placed in a state of F A > F B as the valve of the instrument is opened, and immediately moves to the left in the figure to reach F A Stop when = F B. However, if the back pressure is extremely reduced, for example if the gas pipe is damaged and gas is leaking, the piston 30 will move to the left until it is stopped by the stopper 25, and as a result, the piston 30 will move as one body. A reed switch 43 attached to the moving rod 35 is closed, sending a signal to an associated device (not shown) and activating it to shut off the gas source.
ＦA＜ＦBの時、即ちガス流出側の背圧が増加し
た場合、例えば燃焼器具の弁を絞つて使用するよ
うな時、ピストンは図中右方に移動してスリツト
２１の開放部分を減少させ、それに対応したガス
流量を燃焼器具に供給する。その結果ガス流量は
減少して背圧が低下する為ピストン３０は平衡状
態即ちＦA＝ＦBの状態におかれる迄移動した後停
止する。然し乍ら背圧即ち二次側圧力が一次側圧
力と等しくなる程高まつた場合、例えば燃焼器具
の弁を閉じた時、又はガスホースが踏み潰され一
時的にガスの流れが遮断されたような時、ピスト
ン３０はストツパー２４により停止されるまで右
方に移動し、その結果ロツド３５に付設されたリ
ードスイツチ４２が開成され、連係の装置（図示
せず）に信号を送り、これを前記と同様に作動さ
せてガス源を遮断する。尚このリードスイツチ４
２，４３の信号により作動するガス源の遮断機構
は、安全の為に一旦遮断した後はリセツトしなけ
れば、該スイツチ４２，４３に追従しないように
構成する必要がある。 When F A < F B , that is, when the back pressure on the gas outlet side increases, for example when using a combustion appliance with the valve throttled down, the piston moves to the right in the figure and closes the open part of the slit 21. and supply a corresponding gas flow rate to the combustion appliance. As a result, the gas flow rate decreases and the back pressure decreases, so the piston 30 moves until it reaches an equilibrium state, that is, F A =F B , and then stops. However, if the back pressure, i.e., the secondary pressure, increases to the extent that it becomes equal to the primary pressure, for example, when the valve of a combustion appliance is closed, or when a gas hose is crushed and the gas flow is temporarily cut off. , the piston 30 moves to the right until it is stopped by the stopper 24, so that a reed switch 42 attached to the rod 35 is opened and sends a signal to an associated device (not shown), which is activated in the same manner as before. to shut off the gas source. Furthermore, this reed switch 4
For safety reasons, the gas source cutoff mechanism operated by signals 2 and 43 must be configured so that it will not follow the switches 42 and 43 unless it is reset once it has been cut off.
上述の感知器においてはガス流量が減少した場
合でも、スリツト２１を先細状とした為僅かなガ
ス流の変化にも応じてピストン３０は追従摺動で
き、対応の信号を発生し得る。実際安全装置とし
て使用する上では、装置の感度を高め信頼性ある
ものとする為、ガス流量の小さい範囲に於いては
それに応じて、スリツト部の開口面積を除々に小
さく形成する必要がある。上記本考案の望ましい
実施例はその点も含めてガスの微細な漏洩から大
量放出に至る迄確実にこれを追述検出する能力を
備えるものである。またこの実施例においてはガ
ス流出口を一つとしたが、これを複数個設け、そ
れらに対応の数のリードスイツチを設けることに
より、本感知器をガス配管のマニホルドとして使
用することも可能となる。 In the above-mentioned sensor, even if the gas flow rate decreases, since the slit 21 is tapered, the piston 30 can follow the slight change in the gas flow and can generate a corresponding signal. In actual use as a safety device, in order to increase the sensitivity of the device and make it reliable, it is necessary to gradually reduce the opening area of the slit portion in a range where the gas flow rate is small. In this regard, the preferred embodiment of the present invention has the ability to reliably detect everything from minute gas leaks to large-scale gas emissions. Also, in this embodiment, there is only one gas outlet, but by providing multiple outlets and a corresponding number of reed switches, it is also possible to use this sensor as a manifold for gas piping. .
以上述べたように本考案のガス流感知器によれ
ば、簡単な構造であるにも拘らずガス流の変化を
素早く感知し、それに対応の信号を発生する為、
ガス配管、ホース等に設置する最適の安全装置を
提供し得るものである。 As described above, the gas flow sensor of the present invention, despite its simple structure, can quickly sense changes in gas flow and generate a corresponding signal.
It can provide the optimal safety device for installation in gas piping, hoses, etc.
第１図は本考案ガス流感知器の一実施例を示す
縦断正面図、第２図はその一部を省略して示す横
断面図である。
１０……筐体、１６……シリンダー、１７……
ガス流通路、１８……ガス流入孔、１９……ガス
流出孔、２１……孔（スリツト）、２２……孔、
３０……ピストン、３５……ロツド。
FIG. 1 is a longitudinal sectional front view showing one embodiment of the gas flow sensor of the present invention, and FIG. 2 is a cross sectional view with a part thereof omitted. 10...Casing, 16...Cylinder, 17...
Gas flow passage, 18... Gas inflow hole, 19... Gas outflow hole, 21... Hole (slit), 22... Hole,
30... Piston, 35... Rod.
Claims (1)
ス流通路１７と、これ等に連通するガス流入孔１
８及び流出孔１９とを備える筐体１０と、 シリンダー１６に、その長手方向に沿つて水平
に摺動するように内蔵されたピストン３０と、 ピストン３０に連結されたロツド３５と、 を有し、 通路１７はピストン３０により分割されたシリ
ンダー１６内部両側に夫々孔２１及び孔２２を介
して接続し、 ガス流入孔１８はガス流体がシリンダー１６を
通過した後に通路１７に流入するように位置付け
られ、 ガス流入側のシリンダー１６内部と通路１７と
を接続する孔２１は、ガス流入側に向かつて開孔
面積を徐々に小さくするような形状に形成され、
且つピストン３０の移動に従つて漸次該ピストン
３０の外周面により閉鎖可能となつており、 ロツド３５は、ガス流入側においてピストン３
０に連結され、ガス流入側圧力を受ける軸方向に
垂直なピストン３０の断面が、ガス流出側圧力を
受けるそれよりも小となすべく位置付けられ、 該ピストン３０が、ガス流入側及び流出側の圧
力を夫々内外の対向する面３１，３２に受け、そ
の差圧の変化によりロツド３５と一体となつてシ
リンダー１６内を摺動し、その結果ロツド３５を
介してガス流変化を外部機構に伝達することを特
徴とするガス流感知器。[Claims for Utility Model Registration] A horizontally long cylinder 16, a gas flow passage 17 arranged in parallel with the cylinder, and a gas inflow hole 1 communicating with these.
8 and an outflow hole 19; a piston 30 built into the cylinder 16 so as to slide horizontally along its longitudinal direction; and a rod 35 connected to the piston 30. , the passage 17 is connected to both sides of the interior of the cylinder 16 divided by the piston 30 through holes 21 and 22, respectively, and the gas inlet hole 18 is positioned so that the gas fluid flows into the passage 17 after passing through the cylinder 16. The hole 21 connecting the inside of the cylinder 16 and the passage 17 on the gas inflow side is formed in a shape such that the opening area gradually decreases toward the gas inflow side,
In addition, as the piston 30 moves, it can be gradually closed by the outer peripheral surface of the piston 30, and the rod 35 closes the piston 3 on the gas inflow side.
0 and is positioned such that the cross section of the piston 30 perpendicular to the axial direction receiving pressure on the gas inlet side is smaller than that receiving pressure on the gas outlet side, and the piston 30 is connected to the gas inlet side and the outlet side. Pressure is applied to the inner and outer facing surfaces 31 and 32, respectively, and due to the change in the differential pressure, it slides in the cylinder 16 together with the rod 35, and as a result, the gas flow change is transmitted to the external mechanism via the rod 35. A gas flow sensor characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980085670U JPS6139971Y2 (en) | 1980-06-20 | 1980-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980085670U JPS6139971Y2 (en) | 1980-06-20 | 1980-06-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5714862U JPS5714862U (en) | 1982-01-26 |
| JPS6139971Y2 true JPS6139971Y2 (en) | 1986-11-15 |
Family
ID=29447906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980085670U Expired JPS6139971Y2 (en) | 1980-06-20 | 1980-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6139971Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55164550U (en) * | 1979-05-14 | 1980-11-26 |
-
1980
- 1980-06-20 JP JP1980085670U patent/JPS6139971Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5714862U (en) | 1982-01-26 |
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