JPH0525318U - Axial flow impeller water meter - Google Patents
Axial flow impeller water meterInfo
- Publication number
- JPH0525318U JPH0525318U JP8174691U JP8174691U JPH0525318U JP H0525318 U JPH0525318 U JP H0525318U JP 8174691 U JP8174691 U JP 8174691U JP 8174691 U JP8174691 U JP 8174691U JP H0525318 U JPH0525318 U JP H0525318U
- Authority
- JP
- Japan
- Prior art keywords
- water
- impeller
- meter
- axial flow
- water meter
- 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
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- Measuring Volume Flow (AREA)
Abstract
(57)【要約】
【目的】 メータの被装部内部の電食を防止でき、メー
タの耐久性を高められる軸流羽根車式水道メータを供給
することにある。
【構成】 水の流れの方向に対してほぼ平行となるよう
流路１２内に固定されたピボット２２と、ピボット２２
へ回動自在に外嵌され、外周面には受けた前記水の圧力
を回転運動に変換する羽根２８を有する羽根車１６と、
羽根車１６の回転運動を計測部２０へ伝達する伝達部１
８と、伝達部１８を異物から保護すべく伝達部１８を被
装すると共に、水は内部に進入可能な被装部１４とを具
備する軸流羽根車式水道メータにおいて、被装部１４の
下流側端部には被装部１４内の水を流出させるための流
出孔３６を設けたことを特徴とする軸流羽根車式水道メ
ータ。
(57) [Abstract] [Purpose] To provide an axial flow impeller type water meter that can prevent electrolytic corrosion inside the covered part of the meter and enhance the durability of the meter. A pivot 22 fixed in the channel 12 so as to be substantially parallel to the direction of water flow, and a pivot 22
An impeller 16 that is rotatably externally fitted to the outer peripheral surface and has an impeller 28 that converts the pressure of the received water into a rotational movement on the outer peripheral surface,
Transmission unit 1 that transmits the rotational movement of the impeller 16 to the measurement unit 20.
8 and a transmission part 18 to protect the transmission part 18 from foreign matter, and a covered part 14 into which water can enter, in an axial flow impeller water meter. An axial flow impeller-type water meter characterized in that an outlet hole 36 for letting out water in the mounted portion 14 is provided at a downstream end portion.
Description
【０００１】[0001]
本考案は軸流羽根車式水道メータに関する。 The present invention relates to an axial flow impeller type water meter.
【０００２】[0002]
従来、軸流羽根車式水道メータは、水の圧力を羽根車の回転運動に変え、その 回転数等をギア等から構成される伝達部を介して計測部へ伝達し、計測部におい て流量等の情報が検出できるようになっている。伝達部は、水中の砂等の異物か らギア等を保護するために被装部にて被装されている。また伝達部のギア等は摩 擦抵抗を小さくし、スムーズに動作させる必要があるため、被装部の上流側に水 が内部に進入可能な間隙を設け、被装部内に水を滞留させ、水が伝達部の潤滑剤 として作用するようにしている。なお前記間隙は砂等の異物の侵入を防止可能な 大きさに形成されている。 Conventionally, an axial flow impeller type water meter changes the pressure of water into the rotational motion of an impeller, and transmits the number of revolutions etc. to a measurement unit via a transmission unit composed of gears, etc. It is possible to detect information such as. The transmission section is covered with a covering section to protect the gear and the like from foreign matter such as sand in the water. In addition, because the gears and other parts of the transmission unit need to have low frictional resistance and operate smoothly, a gap that allows water to enter the interior of the equipment to be installed is provided on the upstream side of the equipment to retain water in the equipment. The water acts as a lubricant for the transmission section. The gap is formed to have a size capable of preventing foreign matter such as sand from entering.
【０００３】[0003]
しかしながら、上記従来の軸流羽根車式水道メータは次のような課題がある。 伝達部を被装している被装部には、間隙が上流側にしかないため、被装部内部 に一旦滞留された水は、被装部内からほとんど流出することはない。。 従って、水道管等に取り付けられた後、被装部内部に滞留された水は殆ど入れ 代わることがないため、被装部内部は酸素不足となり、被装部の金属材料（銅の 合金）等と伝達部の金属材料（ステンレス）との間で酸素濃淡電池を形成し、前 記伝達部の金属材料に電食が発生し、メータ故障原因になり、メータの耐久性が 低下するという課題がある。 従って本考案は、上記問題点を解消すべくなされ、その目的とするところは、 メータの被装部内部の電食を防止でき、メータの耐久性を高められる軸流羽根車 式水道メータを供給することにある。 However, the conventional axial flow impeller water meter has the following problems. Since there is only a gap on the upstream side of the mounted part that covers the transmission part, the water once retained inside the mounted part hardly flows out from the inside of the mounted part. . Therefore, after being attached to a water pipe or the like, the water that has accumulated inside the part to be covered is hardly replaced, so that the inside of the part to be covered becomes insufficient in oxygen, and the metal material (copper alloy) of the part to be covered, etc. Oxygen concentration cell is formed between the metal material (stainless steel) of the transmission part and the metal material of the transmission part described above causes electrolytic corrosion, which causes a meter failure and reduces the durability of the meter. is there. Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide an axial flow impeller type water meter which can prevent electrolytic corrosion inside the covered portion of the meter and enhance the durability of the meter. To do.
【０００４】[0004]
【課題を解決するための手段】 上記課題を解決するため、本考案は次の構成を備える。 すなわち、水の流れの方向に対してほぼ平行となるよう流路内に固定されたピ ボットと、該ピボットへ回動自在に外嵌され、外周面には受けた前記水の圧力を 回転運動に変換する羽根を有する羽根車と、該羽根車の回転運動を計測部へ伝達 する伝達部と、該伝達部を異物から保護すべく伝達部を被装すると共に、水は内 部に進入可能な被装部とを具備する軸流羽根車式水道メータにおいて、前記被装 部の下流側端部には被装部内の水を流出させるための流出孔を設けたことを特徴 とする。Means for Solving the Problems In order to solve the above problems, the present invention has the following configuration. That is, a pivot fixed in the flow path so as to be substantially parallel to the flow direction of the water and a pivotally fitted externally fitted to the pivot, the outer peripheral surface of the pivot receives the received pressure of the water. The impeller has a blade that converts into a water, the transmission part that transmits the rotational movement of the impeller to the measurement part, and the transmission part is attached to protect the transmission part from foreign matter, and water can enter the inside. In the axial flow impeller water meter, the outlet end is provided with an outflow hole for letting out water in the covered portion.
【０００５】[0005]
作用について説明する。 本考案によれば、被装部の下流側端部には被装部内の水を流出させるための流 出孔が設けられているので、被装部内の水は流出孔から被装部外へ流出する。そ のため、被装部内には新たな水を導入することが可能となる。 The operation will be described. According to the present invention, the downstream end portion of the mounted portion is provided with the outflow hole for letting out the water in the mounted portion, so that the water in the mounted portion is discharged from the outflow hole to the outside of the mounted portion. leak. Therefore, it becomes possible to introduce new water into the covered part.
【０００６】[0006]
以下、本考案の好適な一実施例について添付図面と共に詳述する。 図１は、本実施例の軸流羽根車式水道メータの一部切欠断面図である。 まず、構造について説明する。 １０はパイプ部であり、内部が水の流路１２に形成され、水は通常矢印Ａから 矢印Ｂの方向（順方向）へ流れる。 水道メータは、主にパイプ部１０に設けられた被装部１４、羽根車１６、伝達 部１８、計測部２０および被装部１４に取り付けられたピボット２２で構成され ている。 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a partially cutaway sectional view of an axial flow impeller type water meter of the present embodiment. First, the structure will be described. Reference numeral 10 denotes a pipe portion, the inside of which is formed in a flow path 12 of water, and the water normally flows in the direction from arrow A to arrow B (forward direction). The water meter is mainly composed of a mounted part 14 provided on the pipe part 10, an impeller 16, a transmission part 18, a measuring part 20, and a pivot 22 attached to the mounted part 14.
【０００７】 さらに詳細に説明する。 ピボット２２は、被装部１４の取付部２４に固定され、被装部１４の左端面に 円形に開設された開口部から左方へ突出する様に設けられており、流路１２のほ ぼ中心であって、水の流れの方向と平行になる様に固定されている。 羽根車１６は、軸受部２６と軸受部２６の外周面から延設された複数の羽根２ ８とから構成される。軸受部２６には右端面に開口する軸穴３０が穿設され、軸 受部２６がピボット２２へ回動可能に外嵌されている。被装部１４の左端開口部 の直径は、羽根車１６の軸受部２６の外径より若干大きく形成されている。従っ て、羽根車１６を被装部１４から突出するピボット２２へ挿入しながら、開口部 へ取り付けた際には、開口部内面と羽根車１６の軸受部２６外周面との間に隙間 ３２が生じ、この隙間３２は被装部１４内部と連通する間隙３２として機能して いる。 伝達部１８は、羽根車１６の回転を直角に伝達するウォームギア機構（不図示 ）を有し、羽根車１６の回転を計測部２０に伝達する。また、水と共に流れてく る砂等の異物からウォームギア機構を保護するため、伝達部１８は容器状の被装 部１４に被装されている。Further details will be described. The pivot 22 is fixed to the mounting portion 24 of the mounted portion 14, and is provided so as to protrude leftward from an opening formed in a circular shape on the left end surface of the mounted portion 14, and to the left of the flow path 12. It is fixed in the center and parallel to the direction of water flow. The impeller 16 includes a bearing portion 26 and a plurality of blades 28 extending from the outer peripheral surface of the bearing portion 26. A shaft hole 30 that opens to the right end surface is bored in the bearing portion 26, and the bearing portion 26 is rotatably fitted onto the pivot 22. The diameter of the left end opening of the mounted portion 14 is formed to be slightly larger than the outer diameter of the bearing portion 26 of the impeller 16. Therefore, when the impeller 16 is inserted into the pivot 22 protruding from the mounted portion 14 and attached to the opening, a gap 32 is formed between the inner surface of the opening and the outer peripheral surface of the bearing portion 26 of the impeller 16. This gap 32 functions as a gap 32 communicating with the inside of the mounted portion 14. The transmission unit 18 has a worm gear mechanism (not shown) that transmits the rotation of the impeller 16 at a right angle, and transmits the rotation of the impeller 16 to the measurement unit 20. Further, in order to protect the worm gear mechanism from foreign matters such as sand flowing with water, the transmission portion 18 is covered by the container-shaped mounting portion 14.
【０００８】 被装部１４は、被装部１４の外周に十字状に配設された支持板３４によって、 流路１２内の中央部に支持されている。また被装部１４の内部は中空状に形成さ れ、右端内部にはピボット２２を固定するための取付部２４が被装部１４の内側 に向かって突設されている。さらに被装部１４の右端面であって、取付部２４と の接合部分の外周付近には、被装部１４内部と連通する流出孔３６が複数個設け られている。流出孔３６の径は、水の粘性、水に含まれる異物の径等を勘案して 決定する。 計測部２０は、伝達部１８から伝達された羽根車１６の回転数等を検出して、 水の流量等を表示する。 支持板３４は、被装部１４を支持すると共に、流路１２を流れる水の流れを整 流する後部整流器として機能している。 ３８は、前部整流器であり、十字状に整流板４０が組み合わされ、整流板４０ の端部がパイプ部１０の内壁に固定されている。羽根車１６に送る水の流れを整 流する。The mounted portion 14 is supported in the center of the flow path 12 by a support plate 34 arranged in a cross shape on the outer periphery of the mounted portion 14. In addition, the inside of the mounted portion 14 is formed in a hollow shape, and a mounting portion 24 for fixing the pivot 22 is provided inside the right end so as to project toward the inside of the mounted portion 14. Further, a plurality of outflow holes 36 communicating with the inside of the mounted portion 14 are provided on the right end surface of the mounted portion 14 near the outer periphery of the joint portion with the mounting portion 24. The diameter of the outflow hole 36 is determined in consideration of the viscosity of water, the diameter of foreign matter contained in water, and the like. The measurement unit 20 detects the number of revolutions of the impeller 16 transmitted from the transmission unit 18 and displays the flow rate of water and the like. The support plate 34 supports the mounted portion 14 and also functions as a rear rectifier that regulates the flow of water flowing through the flow path 12. Reference numeral 38 denotes a front rectifier, in which a rectifying plate 40 is combined in a cross shape, and the end of the rectifying plate 40 is fixed to the inner wall of the pipe portion 10. The flow of water sent to the impeller 16 is regulated.
【０００９】 次に、動作について説明する。 水道メータを組み立て、流路１２内に水を順方向に流すと、水は前部整流器３ ８によって整流され、羽根車１６に左方から水圧をかける。これにより羽根車１ ６は回転を開始する。さらに羽根車１６を通過した水は、つぎの２つの経路に別 れて矢印Ｂ方向に流れ出る。第１の経路は、支持板３４により再度整流されなが ら容器状の被装部の側面を通り、矢印Ｂ方向に流れ出るものであり、第２の経路 は、羽根車１６と被装部１４の左端面間を通過し、間隙３２から被装部１４内に 進入して流出孔３６から矢印Ｂ方向に流れ出るものである。羽根車１６を通過し た水は、流路１２の中心軸方向と平行に流れているため、ほとんどの水は、第１ の経路へ向かう。特に砂等の異物は、水に比べて重いため慣性にて第１の経路へ 向かい、中心軸方向と垂直に形成されている第２の経路への侵入はほとんどない 。また被装部１４内部には、その左端面にある間隙３２から水が進入し、水で充 填される。被装部１４には、間隙３２と流出孔３６とが水の順方向に対して平行 に設けられ、間隙３２、流出孔３６は被装部１４の内部とそれぞれ連通している ため、水は僅かではあるが、間隙３２から被装部１４内部を経由して流出孔３６ へと通過して行くため、被装部１４内部に進入した水は滞留することは無い。 また被装部１４内部に進入した水は、同じく被装部１４内部にある伝達部１８ のウォームギア機構に対しての潤滑剤として作用する。Next, the operation will be described. When the water meter is assembled and the water flows in the flow path 12 in the forward direction, the water is rectified by the front rectifier 38, and the impeller 16 is subjected to water pressure from the left side. This causes the impeller 16 to start rotating. Further, the water that has passed through the impeller 16 is divided into the following two paths and flows out in the direction of the arrow B. The first path passes through the side surface of the container-shaped mounted portion while being straightened by the support plate 34 and flows out in the direction of arrow B, and the second path is the impeller 16 and the mounted portion 14. Through the gap 32 into the mounted portion 14 and flow out in the direction of the arrow B from the outflow hole 36. Since the water that has passed through the impeller 16 flows parallel to the central axis direction of the flow path 12, most of the water goes to the first path. In particular, foreign matter such as sand moves toward the first path due to inertia because it is heavier than water, and hardly enters the second path that is formed perpendicular to the central axis direction. Further, water enters the inside of the mounted portion 14 through the gap 32 on the left end face and is filled with water. A gap 32 and an outflow hole 36 are provided in the mounted portion 14 in parallel to the forward direction of water, and since the gap 32 and the outflow hole 36 communicate with the inside of the mounted portion 14, respectively, Although it is a small amount, since the water passes from the gap 32 to the outflow hole 36 through the inside of the mounted portion 14, the water that has entered the inside of the mounted portion 14 does not stay. Further, the water that has entered the mounted portion 14 acts as a lubricant for the worm gear mechanism of the transmission portion 18 also inside the mounted portion 14.
【００１０】 以上、本考案の好適な実施例について種々述べてきたが、本考案は上述の実施 例に限定されるのではなく、考案の精神を逸脱しない範囲で多くの改変を施し得 るのはもちろんである。Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.
【００１１】[0011]
本考案に係る軸流羽根車式水道メータを用いると、被装部の下流側端部には被 装部内の水を流出させるための流出孔が設けられているので、被装部内の水は流 出孔から被装部外へ流出する。これにより、被装部内には新たな水を導入するこ とが可能となり、被装部内部の水は殆ど滞留しないので、被装部内部は酸素不足 とならず、被装部の金属材料（銅の合金）等と伝達部の金属材料（ステンレス） との間で酸素濃淡電池を形成するおそれがない。その結果、伝達部の金属材料に 電食が発生することはなく、メータ故障防止や、メータの耐久性向上を図ること ができるという著効を奏する。 When the axial flow impeller type water meter according to the present invention is used, since the outflow hole for letting out the water in the covered part is provided at the downstream end of the covered part, the water in the covered part is It flows out of the covered part through the outlet. As a result, new water can be introduced into the covered part, and the water inside the covered part hardly stays, so that the inside of the covered part does not become oxygen deficient and the metal material ( There is no risk of forming an oxygen concentration battery between the copper alloy) and the metallic material (stainless steel) of the transmission part. As a result, electrolytic corrosion does not occur in the metal material of the transmission part, and it is possible to prevent meter failure and improve the durability of the meter.
【図１】本考案に係る軸流羽根車式水道メータの一部切
欠断面図である。FIG. 1 is a partially cutaway sectional view of an axial flow impeller type water meter according to the present invention.
１２ 流路 １４ 被装部 １６ 羽根車 １８ 伝達部 ２０ 計測部 ２２ ピボット ２８ 羽根 ３６ 流出孔 12 flow path 14 mounted part 16 impeller 18 transmission part 20 measuring part 22 pivot 28 blade 36 outflow hole
Claims (1)
よう流路内に固定されたピボットと、該ピボットへ回動
自在に外嵌され、外周面には受けた前記水の圧力を回転
運動に変換する羽根を有する羽根車と、該羽根車の回転
運動を計測部へ伝達する伝達部と、該伝達部を異物から
保護すべく伝達部を被装すると共に、水は内部に進入可
能な被装部とを具備する軸流羽根車式水道メータにおい
て、 前記被装部の下流側端部には被装部内の水を流出させる
ための流出孔を設けたことを特徴とする軸流羽根車式水
道メータ。1. A pivot fixed in a flow path so as to be substantially parallel to a flow direction of water, and a pivotally fitted externally fitted to the pivot so that the pressure of the water received on an outer peripheral surface thereof. An impeller having blades that convert into rotational movement, a transmission section that transmits the rotational movement of the impeller to the measurement section, and a transmission section that protects the transmission section from foreign matter are attached, and water enters the inside. In an axial flow impeller water meter having a mountable part, an outlet hole for letting out water in the mountable part is provided at a downstream end of the mountable part. Flow impeller water meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8174691U JPH0525318U (en) | 1991-09-12 | 1991-09-12 | Axial flow impeller water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8174691U JPH0525318U (en) | 1991-09-12 | 1991-09-12 | Axial flow impeller water meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0525318U true JPH0525318U (en) | 1993-04-02 |
Family
ID=13755005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8174691U Pending JPH0525318U (en) | 1991-09-12 | 1991-09-12 | Axial flow impeller water meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0525318U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54119954A (en) * | 1978-03-10 | 1979-09-18 | Tokico Ltd | Turbineetype flow meter |
| JPS5582016A (en) * | 1978-12-15 | 1980-06-20 | Osaka Gas Co Ltd | Turbine meter |
| JPS60125523A (en) * | 1983-11-21 | 1985-07-04 | グレ−ト・プレ−ンズ・インダストリ−ズ・インコ−ポレ−テツド | Digital flowmeter |
-
1991
- 1991-09-12 JP JP8174691U patent/JPH0525318U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54119954A (en) * | 1978-03-10 | 1979-09-18 | Tokico Ltd | Turbineetype flow meter |
| JPS5582016A (en) * | 1978-12-15 | 1980-06-20 | Osaka Gas Co Ltd | Turbine meter |
| JPS60125523A (en) * | 1983-11-21 | 1985-07-04 | グレ−ト・プレ−ンズ・インダストリ−ズ・インコ−ポレ−テツド | Digital flowmeter |
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