JPS6237150Y2 - - Google Patents
Info
- Publication number
- JPS6237150Y2 JPS6237150Y2 JP12268481U JP12268481U JPS6237150Y2 JP S6237150 Y2 JPS6237150 Y2 JP S6237150Y2 JP 12268481 U JP12268481 U JP 12268481U JP 12268481 U JP12268481 U JP 12268481U JP S6237150 Y2 JPS6237150 Y2 JP S6237150Y2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- water flow
- fluid
- water discharge
- pitot
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000009792 diffusion process Methods 0.000 claims description 17
- 238000009530 blood pressure measurement Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 27
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 2
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Measuring Fluid Pressure (AREA)
Description
【考案の詳細な説明】
この考案は消火栓の放水圧力の測定器、すなわ
ち、消火栓に放水用管鎗を取付けて放水させた際
のノズルから出るジエツト流体（以下、流体とい
う）の圧力をピトーゲージを用いて測定する器具
に関する。[Detailed description of the invention] This invention uses a pitot gauge to measure the water discharge pressure of a fire hydrant, that is, a pitot gauge is used to measure the pressure of jet fluid (hereinafter referred to as fluid) coming out of the nozzle when a water discharge pipe is attached to a fire hydrant and water is discharged. It relates to instruments used for measurement.
従来、ピトーゲージを用いて圧力を測定するに
あたつては、管鎗のプレーパイプ部を一名（高圧
水の場合は二名以上を要する）が保持し、もう一
名がピトーゲージの全圧測定孔がノズルから放出
される流体の中心軸に一致すると同時にピトーゲ
ージの測定孔とノズルの先端面との間の距離を一
定の値となるように保持して行う。つまり、この
種の消火栓の放水圧力は1.7〜７気圧程度である
が放水距離が約４気圧の圧力で30ｍ程にもなり、
放水によるノズルへの反力が大きく測定者は最低
２名は要し、またピトーゲージを流体の中心軸に
挿入するので水が四散し測定作業場所に制限を受
けるとゆう欠点があつた。 Conventionally, when measuring pressure using a pitot gauge, one person (two or more people are required in the case of high-pressure water) holds the play pipe part of the piping, and the other person holds the total pressure measurement hole of the pitot gauge. This is done by keeping the distance between the measurement hole of the pitot gauge and the tip of the nozzle constant so that it coincides with the central axis of the fluid discharged from the nozzle, and at the same time, the distance between the measurement hole of the pitot gauge and the tip surface of the nozzle is maintained at a constant value. In other words, the water discharge pressure of this type of fire hydrant is about 1.7 to 7 atm, but the water discharge distance is about 30 meters at a pressure of about 4 atm.
The reaction force against the nozzle due to water spraying is large, requiring at least two people to measure, and since the pitot gauge is inserted into the central axis of the fluid, water scatters and there are limitations on where measurements can be taken.
この考案は放水圧力が高い場合であつても一名
だけで、しかも簡易な排水溝さえあれば屋内にお
いても測定作業のできる消火栓の放水圧力測定器
の開発を目的とするものであつて、その要旨は真
直な管体に放水用管鎗のノズル部を挿入して嵌合
し、嵌合後のノズル部の先端附近の管体にピトー
ゲージを設置する手段を設けると共に空気孔を穿
設し、水流の拡散及び速度を減ずる手段例えば格
子とか突起を管体内に設け、この管体のもう一方
の端部には流体を分岐してさらに減速するための
水流方向変換部を設けたものである。 The purpose of this invention is to develop a fire hydrant water discharge pressure measuring device that can be used to measure the water discharge pressure of fire hydrants even when the water discharge pressure is high, by just one person and even indoors as long as there is a simple drain. The gist is to insert and fit the nozzle part of the water discharge pipe into a straight pipe body, provide a means for installing a pitot gauge on the pipe body near the tip of the nozzle part after fitting, and drill an air hole. Means for reducing the diffusion and velocity of the water flow, such as a grid or projections, are provided within the tube, and the other end of the tube is provided with a water flow direction changer for branching the fluid and further slowing it down.
以下、この考案を図例について説明すると第１
図において管体５の一端に管鎗ノズル１を挿嵌で
きるように嵌挿部５Ａを設け、且、管鎗ノズル１
の先端面と一定の距離だけ離してピトーゲージ１
２の全圧測定孔１３がくるように管体５の壁面に
ピトーゲージを保持する適当な手段をとる。図例
ではピトーゲージ１２の位置決め用のスリツト１
４を形成する。なお、この実施例ではスリツト１
４を２個形成しているが１個でも機能上支障はな
い。ピトーゲージ１２を保持する手段はこの図例
のほか把持具によりピトーゲージを管体に固定す
るようにしてもよい。次に管鎗ノズル１の先端附
近の管体５の壁面には外気取入れ用の空気孔７を
２個所設けている（第３図参照）。そして、第１
図に示すように管体５の右方には拡散部Ｐとして
十文字形の格子４を壁面に固着している。この拡
散部Ｐは第４図に示すように、その格子点１５が
管体５の軸心に一致し、第１図に示すようにその
格子面が管体５の軸心に垂直となるように取付け
られる。この実施例の外にも粗い多格子点の拡散
部材例えば金網等を用いてもよい。次に、第１図
に示すように、この拡散部Ｐの右方には水流減速
部Ｑとして流体２の速度を減ずるための突起９を
管体内の壁面に形成している。ここに、第５図に
示すようにこの実施例では管体５の内周上に等間
隔に管体５の半径方向に向かう４個の突起９を設
けているが、２個又は３個あるいは高さの低い多
数の突起ないしは凹凸を壁面に設けることも有効
な機能を発揮する。そして、これらの突起９を第
６図に示すように、管体５の端面を折曲げて成形
し、一点鎖線で示すソケツト１６で二つの管体を
結合することもできる。 Below, this idea will be explained using an example.
In the figure, a fitting portion 5A is provided at one end of the tubular body 5 so that the tube spear nozzle 1 can be inserted thereinto, and the tube spear nozzle 1 is provided at one end.
Pitot gauge 1 at a certain distance from the tip of the
Appropriate means are taken to hold the pitot gauge on the wall surface of the tube body 5 so that the total pressure measurement hole 13 of No. 2 is located. In the example shown, slit 1 is used for positioning the pitot gauge 12.
form 4. Note that in this example, slit 1
4 is formed, but there is no functional problem even if there is only one. In addition to this example, the means for holding the pitot gauge 12 may be such that the pitot gauge is fixed to the tube body using a gripping tool. Next, two air holes 7 for taking in outside air are provided on the wall surface of the tube body 5 near the tip of the tube spear nozzle 1 (see FIG. 3). And the first
As shown in the figure, on the right side of the tube body 5, a cross-shaped lattice 4 is fixed to the wall surface as a diffusion section P. As shown in FIG. 4, this diffusion part P has its lattice points 15 aligned with the axis of the tube 5, and its lattice plane is perpendicular to the axis of the tube 5, as shown in FIG. mounted on. In addition to this embodiment, a diffusion member having a large number of coarse lattice points, such as a wire mesh, etc. may be used. Next, as shown in FIG. 1, on the right side of this diffusion part P, a protrusion 9 as a water flow deceleration part Q for reducing the velocity of the fluid 2 is formed on the wall surface of the tube. Here, as shown in FIG. 5, in this embodiment, four protrusions 9 extending in the radial direction of the tube body 5 are provided at equal intervals on the inner circumference of the tube body 5, but there may be two, three or three protrusions. Providing a large number of low protrusions or irregularities on the wall surface also has an effective function. As shown in FIG. 6, these protrusions 9 can be formed by bending the end face of the tube 5, and the two tubes can be connected with a socket 16 shown by a dashed line.
以上の実施例では第１図に示すように、拡散部
Ｐの右方に水流減速部Ｑを設けているが、水流減
速部Ｑの右方に拡散部Ｐを置いてもよい。 In the above embodiment, as shown in FIG. 1, the water flow deceleration part Q is provided on the right side of the diffusion part P, but the diffusion part P may be placed on the right side of the water flow deceleration part Q.
次に、水流方向変換部Ｒについて説明すると、
管体５の端部にＴ形管継手１７を結合し、その両
端にエルボ管１９を結合している。エルボ管１９
の結合方向はこの実施例では第１図に示すように
管体５の軸線に対して約45゜の仰角にしてある
が、管体５の長さ、排水溝の位置との関係に応じ
適宜に変えることができる。なお、この実施例で
は分岐管継手としてＴ形管継手１７を用いている
がＹ形管継手を用いることも勿論可能である。 Next, the water flow direction conversion part R will be explained.
A T-shaped pipe joint 17 is connected to the end of the tube body 5, and elbow pipes 19 are connected to both ends thereof. Elbow pipe 19
In this embodiment, the joining direction is set at an elevation angle of about 45° with respect to the axis of the tube 5 as shown in FIG. can be changed to In this embodiment, a T-shaped pipe joint 17 is used as the branch pipe joint, but it is of course possible to use a Y-shaped pipe joint.
また、管体５の内径、長さ、内面の粗さなどの
違いにより流体摩擦抵抗の大きさが変わるので突
起９の大きさ、形成位置は適宜決定される。 Further, since the magnitude of fluid frictional resistance changes depending on the inner diameter, length, roughness of the inner surface, etc. of the tube body 5, the size and formation position of the protrusion 9 are appropriately determined.
尚、この考案に係る流体の拡散減速機構につい
て第２図を用いて説明すると、管鎗ノズル部１の
先端から放出される流体２は放出方向に垂直な断
面にわたつて一様な速度分布３のコアを有してい
る。そこで、拡散部Ｐにコアの中心部が当たるよ
うに管体５の壁面に拡散部Ｐを取付けると同時に
管体５の壁面に外気６の取入れ用空気孔７を形成
すれば流体２に吸引された外気６は流体と混合
し、流体２は円すい状に拡散する。よつて流体２
の速度分布８に示すようにコアは小さくなる。す
なわち、流体とその周囲の外気との境界面附近の
速度はいちじるしく減少する。そして、管体５の
内面に突起９を形成すれば、速度分布１０に示す
ようにコアを早く消滅させることが可能である。
また、流体の通過面積を増せば、速度分布１１に
示すようにさらに速度勾配を小さくできる。 In addition, to explain the fluid diffusion deceleration mechanism according to this invention using FIG. 2, the fluid 2 discharged from the tip of the pipe nozzle part 1 has a uniform velocity distribution 3 over the cross section perpendicular to the discharge direction. It has a core of Therefore, if the diffusion part P is attached to the wall of the tube 5 so that the center of the core touches the diffusion part P, and at the same time an air hole 7 for intake of the outside air 6 is formed in the wall of the tube 5, the air will be sucked into the fluid 2. The outside air 6 mixed with the fluid mixes with the fluid 2, and the fluid 2 is diffused in a conical shape. Yotsute fluid 2
As shown in velocity distribution 8, the core becomes smaller. That is, the velocity near the interface between the fluid and the surrounding air is significantly reduced. If the protrusions 9 are formed on the inner surface of the tubular body 5, the core can be quickly eliminated as shown in the velocity distribution 10.
Furthermore, if the area through which the fluid passes is increased, the velocity gradient can be further reduced as shown in velocity distribution 11.
次に、この考案の作用について説明すれば第１
図のようにノズル部１を管体５の嵌挿部５Ａに挿
入嵌合してのち片手で管体５を握ぎりながら放水
を開始する。そして、もう一方の手でピトーゲー
ジ１２の上部を持つてスリツト１４に当て流体の
軸心に全圧測定孔１３が一致するように保持す
る。かくすれば、流体はピトーゲージ１２の周囲
を流れたのち、空気孔７から補給される外気を巻
き込み拡散しながら拡散部Ｐに衝突するので、流
体のコアはかなり小さくなつて管体５中を一ぱい
になつて流れ、流体は水流減速部Ｑに当たつてさ
らに減速する。次いで、流体２は水流方向変換部
ＲのＴ形管継手１７により分岐するので流速は著
しく低下し、流体２はエルボ管１９により方向を
変えて排水溝に放出される。このときの流体２の
放出距離はエルボ管１９の取付け方向により異な
るが消火栓の圧力が４気圧のときエルボ管１９の
管端から約0.5ｍ（水平面と45゜の角度で上方に
放出時）となりきわめて小さくなる。 Next, I will explain the function of this device.
After inserting and fitting the nozzle part 1 into the fitting part 5A of the tube body 5 as shown in the figure, water spraying is started while gripping the tube body 5 with one hand. Then, hold the upper part of the pitot gauge 12 with the other hand and hold it against the slit 14 so that the total pressure measurement hole 13 is aligned with the axis of the fluid. In this way, after the fluid flows around the pitot gauge 12, it collides with the diffusion part P while entraining the outside air supplied from the air hole 7 and diffusing, so that the core of the fluid becomes considerably small and completely fills the inside of the pipe body 5. The fluid then hits the water flow deceleration part Q and is further decelerated. Next, the fluid 2 is branched by the T-shaped pipe joint 17 of the water flow direction changing part R, so that the flow velocity is significantly reduced, and the fluid 2 is changed direction by the elbow pipe 19 and discharged into the drainage ditch. The discharge distance of the fluid 2 at this time varies depending on the installation direction of the elbow pipe 19, but when the pressure of the fire hydrant is 4 atmospheres, it is approximately 0.5 m from the end of the elbow pipe 19 (when discharged upward at an angle of 45 degrees with the horizontal plane). becomes extremely small.
この考案は前記したようにピトーゲージの取付
け個所において外気の取入れ用の空気孔を形成し
た管体内のジエツトを放出する構成としているの
で、ピトーゲージの保持を固定手段をとらぬ場合
でも一名の測定者により水しぶきを大きく上げる
ことなく作業できる。また、拡散部を管壁に固着
し、水流減速部を管体内の壁面に形成しており、
空気孔を有しているので、流体を効率良く減速拡
散できる。さらには、この考案では水流方向変換
部としてＴ形又はＹ形管継手などの分岐管継手と
エルボ管を用いているので、流体の減速をさらに
確実に行うことができ、放水方向と流体の放出反
力を容易に変えることができる。すなわち、屋内
の消火栓についても手洗洗面所のような簡易な排
水溝があれば放水圧力測定を一名の測定者で容易
に行うことができる。 As mentioned above, this device is configured to release the jet inside the tube with air holes for taking in outside air at the point where the pitot gauge is installed, so even if no fixing means is used to hold the pitot gauge, only one person can measure it. This allows you to work without making a big splash. In addition, the diffusion part is fixed to the pipe wall, and the water flow reducing part is formed on the wall inside the pipe.
Since it has air holes, the fluid can be efficiently decelerated and diffused. Furthermore, since this invention uses a branch pipe joint such as a T-type or Y-type pipe joint and an elbow pipe as the water flow direction conversion part, the deceleration of the fluid can be more reliably achieved, and the direction of water discharge and fluid discharge can be changed even more. Reaction force can be easily changed. That is, even for indoor fire hydrants, if there is a simple drainage ditch such as in a hand washroom, water discharge pressure can be easily measured by one person.
又、この考案による測定器でテストする場合、
従来方式と同様ピトーゲージの位置は共に管鎗ノ
ズルの先端に配置されているので、その測定圧力
は両者共変りはない。 Also, when testing with a measuring device based on this invention,
As in the conventional method, both pitot gauges are located at the tip of the piston nozzle, so the measured pressure is the same in both cases.
図はこの考案の実施例を示し、第１図は一部切
欠き全体斜視図、第２図は流体の拡散減速機構の
説明用断面図、第３図は第１図のＡ−Ａ矢視断面
図でピトーゲージの保持部分を示すもの、第４図
は同じくＢ−Ｂ矢視断面図で水流拡散部Ｐを示す
もの、第５図は同じくＣ−Ｃ矢視断面図で水流減
速部Ｑを示すもの、第６図は第５図において突起
の形成方法を示す斜視図、第７図は使用態様図で
ある。
１……ノズル部、４……拡散部材、５……管
体、７……空気孔、９……突起、１２……ピトー
ゲージ、１４……スリツト、１５……格子点、１
７……Ｔ形管継手、１９……エルボ管。
The figures show an embodiment of this invention; Fig. 1 is a partially cutaway overall perspective view, Fig. 2 is an explanatory cross-sectional view of the fluid diffusion deceleration mechanism, and Fig. 3 is taken along arrow A-A in Fig. 1. A cross-sectional view showing the holding part of the pitot gauge, FIG. 4 is a cross-sectional view along B-B showing the water flow diffusion part P, and FIG. 5 is a cross-sectional view along C-C showing the water flow reducing part Q. FIG. 6 is a perspective view showing a method of forming the protrusions in FIG. 5, and FIG. 7 is a usage diagram. DESCRIPTION OF SYMBOLS 1... Nozzle part, 4... Diffusion member, 5... Tube body, 7... Air hole, 9... Protrusion, 12... Pitot gauge, 14... Slit, 15... Grid point, 1
7...T-shaped pipe joint, 19...Elbow pipe.
Claims (1)
嵌挿部を設け、該嵌挿部の前端にピトーゲージ
の全圧測定孔が位置するようにピトーゲージ保
持手段を設けると共に空気孔を穿設し、更にそ
の前方に水流拡散・減速部を設け、管体の他端
に水流方向変換部を設けたことを特徴とする消
火栓の放水圧力測定器。 ２ 十文字形をなした格子４であつて、その格子
点１５が管体５の軸心に一致しその格子面が管
体５の軸心に垂直となるように管体５の壁面に
取付けて水流拡散部Ｐとした実用新案登録請求
の範囲第１項記載の消火栓の放水圧力測定器。 ３ 管体５の内周上に等間隔に管体５の半径方向
に向かう２個ないしは４個の突記９を設けて水
流減速部Ｑとした実用新案登録請求の範囲第１
項又は第２項記載の消火栓の放水圧力測定器。[Scope of Claim for Utility Model Registration] 1. A pitot gauge holding means is provided at one end of the pipe body with a fitting part capable of holding a water discharge pipe nozzle, and the pitot gauge holding means is arranged such that the total pressure measurement hole of the pitot gauge is located at the front end of the fitting part. 1. A water discharge pressure measuring device for a fire hydrant, characterized in that an air hole is provided, a water flow diffusion/deceleration section is provided in front of the air hole, and a water flow direction changing section is provided at the other end of the pipe body. 2. A grid 4 in the shape of a cross, which is attached to the wall surface of the tube 5 so that its lattice points 15 coincide with the axis of the tube 5 and the lattice surface is perpendicular to the axis of the tube 5. A water discharge pressure measuring device for a fire hydrant as set forth in claim 1 of the utility model registration claim, having a water flow diffusion portion P. 3 Utility model registration claim 1: Two or four protrusions 9 are provided on the inner circumference of the tube body 5 at equal intervals in the radial direction of the tube body 5 to form a water flow reducing part Q.
A water discharge pressure measuring device for a fire hydrant according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12268481U JPS5832342U (en) | 1981-08-19 | 1981-08-19 | Fire hydrant water pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12268481U JPS5832342U (en) | 1981-08-19 | 1981-08-19 | Fire hydrant water pressure measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5832342U JPS5832342U (en) | 1983-03-02 |
| JPS6237150Y2 true JPS6237150Y2 (en) | 1987-09-22 |
Family
ID=29916604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12268481U Granted JPS5832342U (en) | 1981-08-19 | 1981-08-19 | Fire hydrant water pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5832342U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0538761Y2 (en) * | 1986-09-02 | 1993-09-30 | ||
| JP4772898B2 (en) * | 2009-10-07 | 2011-09-14 | 能美防災株式会社 | Emission inspection equipment used for fire hydrants |
-
1981
- 1981-08-19 JP JP12268481U patent/JPS5832342U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5832342U (en) | 1983-03-02 |
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