JPH084572Y2 - High temperature electronic flow meter - Google Patents
High temperature electronic flow meterInfo
- Publication number
- JPH084572Y2 JPH084572Y2 JP4790590U JP4790590U JPH084572Y2 JP H084572 Y2 JPH084572 Y2 JP H084572Y2 JP 4790590 U JP4790590 U JP 4790590U JP 4790590 U JP4790590 U JP 4790590U JP H084572 Y2 JPH084572 Y2 JP H084572Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic sensor
- high temperature
- flow meter
- water
- case
- 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 - Fee Related
Links
- 235000006506 Brasenia schreberi Nutrition 0.000 claims description 22
- 244000267222 Brasenia schreberi Species 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
Landscapes
- Details Of Flowmeters (AREA)
- Details Of Measuring And Other Instruments (AREA)
- Measuring Volume Flow (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、高温水の通過量を測定する電子式流量計に
関する。詳しくは高温水の通過流量に応じて羽根車を回
転し、その羽根車に取り付けた永久磁石でセンサをオ
ン、オフして前記通過流量を測定する高温用電子式流量
計に関する。TECHNICAL FIELD The present invention relates to an electronic flow meter for measuring the amount of hot water passing through. More specifically, the present invention relates to a high-temperature electronic flow meter that rotates an impeller according to the flow rate of high-temperature water, and turns a sensor on and off with a permanent magnet attached to the impeller to measure the flow rate.
従来の技術 従来、電子式水道メータを高温水の測定に使用する場
合には磁気センサ及び電子回路を有する計数表示部を高
温水の熱から保護するため第８図に示すような構成のも
のが用いられている。2. Description of the Related Art Conventionally, when an electronic water meter is used for measuring high-temperature water, a structure as shown in FIG. 8 is used to protect the counting display unit having a magnetic sensor and an electronic circuit from heat of high-temperature water. It is used.
即ち、高温水が外ケース１の入口1aからインナーケー
ス２内を通って出口1bに流れ、その流量に応じて羽根車
３を回転するようになっている。That is, high temperature water flows from the inlet 1a of the outer case 1 through the inner case 2 to the outlet 1b, and the impeller 3 is rotated according to the flow rate.
前記インナーケース２上には高温水を外部に漏らさな
いようにする遮水板４が取付けられているが、この遮水
板４は直接高温水に接し高温となるため、遮水板４を中
空部を有する高さのあるものとし、電子回路を有する計
数表示部５と磁気センサ６とをその上部に設けて高温と
なることを防止している。そして羽根車３に取付けた永
久磁石７の回転を磁気センサ６に伝達するための従動磁
石８を下端部に、磁気センサ６と対応する永久磁石９を
上端部に夫々設けた回転軸10を遮水板４の中空部内に回
転自在に設けて、羽根車３の回転を計数表示するように
なっている。A water shield plate 4 is attached on the inner case 2 to prevent the high temperature water from leaking to the outside. Since the water shield plate 4 directly contacts the high temperature water and has a high temperature, the water shield plate 4 is hollow. It is assumed that there is a portion having a height, and the counting display portion 5 having an electronic circuit and the magnetic sensor 6 are provided above the portion to prevent the temperature from becoming high. Then, a driven magnet 8 for transmitting the rotation of the permanent magnet 7 attached to the impeller 3 to the magnetic sensor 6 is provided at the lower end portion, and a permanent magnet 9 corresponding to the magnetic sensor 6 is provided at the upper end portion to shield a rotary shaft 10. The water plate 4 is rotatably provided in the hollow portion to count and display the rotation of the impeller 3.
考案が解決しようとする課題 しかしながら、上記のような従来の構造では、磁気セ
ンサ６及び電子回路を有する計数表示部５を高温から保
護するために永久磁石７から磁気センサ６までの距離を
充分に取らなくてはならない。しかもこのような構成と
しても遮水板４の中空部内の空気が熱対流を起こすこと
により、高温からの保護が完全に行えないため、電子回
路を有する計数表示部５の空間を大きくとり放熱効果を
出さなければならず、流量計が嵩高い物となる欠点があ
った。However, in the conventional structure as described above, the distance from the permanent magnet 7 to the magnetic sensor 6 is sufficiently large to protect the magnetic sensor 6 and the counting display unit 5 having an electronic circuit from high temperature. I have to take it. Moreover, even with such a configuration, since the air in the hollow portion of the water shield plate 4 causes thermal convection, protection from high temperatures cannot be completely performed, so that a large space is provided for the counting display portion 5 having an electronic circuit and a heat radiation effect is obtained. Therefore, there is a drawback that the flow meter becomes bulky.
また、遮水板４を介して対向する永久磁石７と従動磁
石８とが互に吸引することにより、羽根車３に負荷が掛
ることとなり、大流量域においては羽根車３の駆動力が
大であるためその回転に対する影響は少ないが、小流量
域においてはその回転に対する影響は大であって器差が
劣化する欠点があった。Further, the permanent magnet 7 and the driven magnet 8 facing each other through the water shield plate 4 attract each other, so that the impeller 3 is loaded, and the driving force of the impeller 3 is large in a large flow rate range. Therefore, the influence on the rotation is small, but in the small flow rate region, the influence on the rotation is large and the instrumental error is deteriorated.
そこで本考案は流量計が嵩高いものとならず、しかも
小流量域における器差の改善された高温用電子式流量計
の提供を目的としている。Therefore, an object of the present invention is to provide a high-temperature electronic flow meter in which the flow meter is not bulky and the instrumental error in the small flow range is improved.
課題を解決するための手段 上記の目的を達成させるために、請求項１の考案にお
いては高温水の通過流量に応じて羽根車13を回転し、そ
の羽根車13に取付けた永久磁石15で磁気センサ18をオ
ン、オフして前記通過流量を測定する高温用電子式流量
計において、前記永久磁石15と前記磁気センサ18との間
の遮水板14とともに真空空間24を設けたことを特徴とす
る。Means for Solving the Problems In order to achieve the above object, in the invention of claim 1, the impeller 13 is rotated according to the flow rate of the hot water, and the permanent magnet 15 attached to the impeller 13 magnetizes the magnetic field. In the high temperature electronic flow meter for measuring the passing flow rate by turning on and off the sensor 18, a vacuum space 24 is provided together with the water shield plate 14 between the permanent magnet 15 and the magnetic sensor 18. To do.
また、請求項２に記載の考案は、請求項１記載の高温
用電子式流量計において遮水板14と磁気センサ18との間
に断熱板26が設けられていることを特徴とする。The invention according to claim 2 is characterized in that in the high temperature electronic flowmeter according to claim 1, a heat insulating plate 26 is provided between the water shield plate 14 and the magnetic sensor 18.
また、請求項３の考案は、請求項１記載の高温用電子
式流量計における遮水板14と磁気センサ18との間に放熱
材27が設けられていることを特徴とする。The invention of claim 3 is characterized in that a heat radiating material 27 is provided between the water shield plate 14 and the magnetic sensor 18 in the high temperature electronic flow meter according to claim 1.
作用 上記のように構成された高温用電子式流量計は、永久
磁石15と磁気センサ18との間に遮水板14とともに真空空
間24を設けたことにより、高温水の熱を真空空間24で遮
断し、磁気センサ18や計数表示部17を高温から保護す
る。The high-temperature electronic flowmeter configured as described above has the vacuum space 24 together with the impermeable plate 14 between the permanent magnet 15 and the magnetic sensor 18, so that the heat of the high-temperature water is transferred to the vacuum space 24. It shuts off and protects the magnetic sensor 18 and the counting display unit 17 from high temperatures.
また、請求項２の考案は、さらに遮水板14と磁気セン
サ18との間に断熱板26が設けられて断熱効果が増し、請
求項３の考案においては放熱材27が設けられ、高温水か
らの熱が放熱材27によって逃されて磁気センサ18等に対
する断熱効果が向上する。Further, in the invention of claim 2, a heat insulating plate 26 is further provided between the water shield plate 14 and the magnetic sensor 18 to increase the heat insulating effect, and in the invention of claim 3, a heat radiating material 27 is provided, so that high temperature water is provided. The heat is released by the heat radiating material 27, and the heat insulating effect for the magnetic sensor 18 and the like is improved.
実施例 以下この考案の実施例について図面に従い説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図において11は外ケースであり、この外ケースに
は水の入口11aと出口11bとが設けられている。この外ケ
ース11内には、筒状のインナーケース12が設けられてお
り、このインナーケース12は下インナーケース12aと上
インナーケース12bとよりなっており、下インナーケー
ス12aには高温水の流入口12a′及び流出口12a″が夫々
複数個宛設けられている。そして上インナーケース12b
の上面に遮水板14が設けられている。13は下インナーケ
ース12a内に収められた羽根車であって、下インナーケ
ース12aと上インナーケース12b内に、垂直にその軸13a
を回転自在に保持されており、軸13aの上端部には永久
磁石15が取付けられて、軸13aと一体的に回転するよう
になっている。In FIG. 1, reference numeral 11 denotes an outer case, which is provided with a water inlet 11a and a water outlet 11b. A cylindrical inner case 12 is provided inside the outer case 11. The inner case 12 is composed of a lower inner case 12a and an upper inner case 12b. A plurality of inlets 12a 'and a plurality of outlets 12a "are provided for each. And the upper inner case 12b.
A water shield plate 14 is provided on the upper surface of the. Reference numeral 13 denotes an impeller housed in the lower inner case 12a, and the shaft 13a is vertically arranged in the lower inner case 12a and the upper inner case 12b.
Is rotatably held, and a permanent magnet 15 is attached to the upper end of the shaft 13a so as to rotate integrally with the shaft 13a.
また、遮水板14の周縁部上面を覆うように上ケース16
が設けられ、さらにその上に複数の脚部17aを有する計
数表示部17が脚部17aにより立設固定されている。In addition, the upper case 16 covers the upper surface of the peripheral edge of the water shield plate 14.
Is provided, and the counting display portion 17 having a plurality of leg portions 17a is further erected and fixed on the leg portions 17a.
そして計数表示部17の下面から磁気センサケース18a
が前記軸13a上の位置に垂設され、磁気センサケース18a
下面と遮水板14との間に空間19が設けられている。Then, from the bottom surface of the counting display unit 17, the magnetic sensor case 18a
Is vertically installed at a position on the shaft 13a, and the magnetic sensor case 18a
A space 19 is provided between the lower surface and the water shield plate 14.
また磁気センサケース18aと電子回路を有する計数表
示部17とを分離するための隔壁状の蓋20が設けられ、蓋
20の下面周縁部と磁気センサケース18a周壁内面との連
設部にＯリング21の封入部が設けられて、Ｏリング21が
封入され、また蓋20の上面周縁部には周回状の凹段部が
設けられ、この凹段部と磁気センサケース18aの周壁内
面との間に樹脂22が充填されて、磁気センサケース18a
内を真空状態に保持するように構成されている。そし
て、この磁気センサケース18a内には、一対の立上り部
により、前記蓋20下面に吊設された磁気センサ保持部23
に保持された磁気センサ18がこの真空空間24内に収納さ
れ、前記永久磁石15と対向している。Further, a partition wall-shaped lid 20 for separating the magnetic sensor case 18a and the counting display unit 17 having an electronic circuit is provided.
An O-ring 21 enclosing portion is provided in a connecting portion between the lower surface peripheral edge portion of 20 and the inner surface of the magnetic sensor case 18a peripheral wall, and the O-ring 21 is enclosed, and the peripheral edge portion of the upper surface of the lid 20 has a circular concave step. Is provided, and resin 22 is filled between the recessed step portion and the inner surface of the peripheral wall of the magnetic sensor case 18a.
The inside is kept in a vacuum state. Then, in the magnetic sensor case 18a, a magnetic sensor holding portion 23 suspended from the lower surface of the lid 20 by a pair of rising portions.
The magnetic sensor 18 held by is housed in the vacuum space 24 and faces the permanent magnet 15.
そして、磁気センサ18から電子回路を有する計数表示
部への結線は、例えば蓋20にインサート成形された端子
25等を介して行うようにする。磁気センサ保持部23への
磁気センサ18の取付けは、第２図のように保持部23に穴
をあけて、磁気センサ18を嵌挿した後樹脂により被覆す
るようにして取付ける。And, the connection from the magnetic sensor 18 to the counting display unit having an electronic circuit is performed by, for example, a terminal insert-molded in the lid 20.
25 and so on. The magnetic sensor 18 is attached to the magnetic sensor holding portion 23 by making a hole in the holding portion 23 as shown in FIG. 2, inserting the magnetic sensor 18 and then covering with the resin.
上記のように構成された流量計は、磁気センサ18が遮
水板14との間に空間19が設けられた磁気センサケース18
a内に、真空状態で設けられているので、外ケース11、
インナーケース12にて構成されている流路内を通過する
高温水の熱が断熱されて磁気センサ18に伝わることが防
止され、また回転軸や従動磁石等は不要である。また第
３図のように前記実施例の蓋20の中央部にその底部が磁
気センサケース18aの底部に接近する凹部20aを設け、そ
の凹部20aの底部上面に磁気センサ18を取付けるように
する場合があり、磁気センサ18は真空空間24を介して保
持された状態としている。さらに第４図のように前記第
３図の実施例における真空空間24とされている磁気セン
サケース18a内の底面、及び内周面下部とを断熱板26で
覆い、更に磁気センサ18等への熱伝達の防止効果を向上
させるようにすることもある。The flowmeter configured as described above has a magnetic sensor case 18 in which a space 19 is provided between the magnetic sensor 18 and the water shield plate 14.
Since it is provided in a vacuum state inside the outer case 11,
The heat of the high temperature water passing through the flow path formed by the inner case 12 is prevented from being insulated and transmitted to the magnetic sensor 18, and the rotating shaft, the driven magnet, etc. are unnecessary. Further, as shown in FIG. 3, when the recess 20a whose bottom approaches the bottom of the magnetic sensor case 18a is provided at the center of the lid 20 of the above embodiment, and the magnetic sensor 18 is attached to the upper surface of the bottom of the recess 20a. Therefore, the magnetic sensor 18 is in a state of being held via the vacuum space 24. Further, as shown in FIG. 4, the bottom surface of the magnetic sensor case 18a, which is the vacuum space 24 in the embodiment of FIG. 3, and the lower inner peripheral surface are covered with a heat insulating plate 26, and the magnetic sensor 18 In some cases, the effect of preventing heat transfer is improved.
また、第５図のように前記第１の実施例における遮水
板14上に、例えば発泡スチロール等の断熱板26を設ける
場合がある。この場合は遮水板14上面からの放熱を防止
し、磁気センサ18との断熱効果を向上させることができ
る。Further, as shown in FIG. 5, a heat insulating plate 26 such as Styrofoam may be provided on the water shield plate 14 in the first embodiment. In this case, it is possible to prevent heat radiation from the upper surface of the water shield plate 14 and improve the heat insulation effect with the magnetic sensor 18.
また、第６図のように、第１の実施例における計数表
示部17の底面に、第７図に示すようなケース状に形成し
た、例えば銅板等の放熱材27を磁気センサケース18aと
の間に、間隔をあけてこのケース18aを覆うように設
け、その周面には複数の切欠27aを設ける場合がある。
この場合は遮水板14から伝達される熱をこの放熱材27の
全面から放熱し、放熱材27の内面から放熱される熱は切
欠27aから、計数表示部17の脚部17a間を介して外部へ拡
散し、磁気センサケース18aへの熱伝達を防止し、磁気
センサ18や計数表示部17への熱の影響がないようにし、
更に断熱性を向上させる。Further, as shown in FIG. 6, a heat dissipating material 27 such as a copper plate formed in a case shape as shown in FIG. 7 on the bottom surface of the counting display portion 17 in the first embodiment is connected to the magnetic sensor case 18a. In some cases, the case 18a may be provided with a space therebetween, and a plurality of notches 27a may be provided on the peripheral surface thereof.
In this case, the heat transmitted from the water shield plate 14 is radiated from the entire surface of the heat radiating material 27, and the heat radiated from the inner surface of the heat radiating material 27 is passed from the notch 27a to between the leg portions 17a of the counting display unit 17. It diffuses to the outside, prevents heat transfer to the magnetic sensor case 18a, and prevents the magnetic sensor 18 and the counting display unit 17 from being affected by heat,
Further improve the heat insulating property.
考案の効果 本考案に係る高温用電子式流量計は上記のように構成
され、特に永久磁石と磁気センサとの間に遮水板ととも
に真空空間を設けたので、磁気センサケース内への熱の
伝達が防止され、磁気センサを熱から保護することがで
きる。また、この真空空間によって電子回路を有する計
数表示部を熱から保護することができるので、計数表示
部を必要最小限の空間とすることができ、流量計全体の
嵩を小さくすることができる。Effect of the Invention The high temperature electronic flowmeter according to the present invention is configured as described above, and in particular, since the water shield plate and the vacuum space are provided between the permanent magnet and the magnetic sensor, heat of the inside of the magnetic sensor case is prevented. Transmission is prevented and the magnetic sensor can be protected from heat. Moreover, since the counting display portion having the electronic circuit can be protected from heat by this vacuum space, the counting display portion can be a minimum necessary space, and the bulk of the flow meter as a whole can be reduced.
請求項２の考案は更に、従動磁石をなくしたため羽根
車の回転時の負荷がなくなり、小流量域の器差を改善す
ることができる。Further, in the invention of claim 2, since the driven magnet is eliminated, the load during rotation of the impeller is eliminated, and the instrumental error in the small flow rate region can be improved.
また請求項３の考案においては遮水板と磁気センサと
の間に断熱材、或は放熱材が設けられることにより、磁
気センサケースに対する断熱性が増し、上記の磁気セン
サ、計数表示部を熱から保護する効果が向上する。Further, in the invention of claim 3, by providing a heat insulating material or a heat radiating material between the water shield plate and the magnetic sensor, the heat insulating property for the magnetic sensor case is increased, and the magnetic sensor and the counting display unit are heated. The effect of protecting from is improved.
第１図は本考案の高温用電子式流量計の一実施例の断面
図、第２図は磁気センサ保持部の斜視図、第３図乃至第
６図は他の各種実施例の要部拡大断面図、第７図は第６
図の実施例におけるケース状の放熱材の斜視図、第８図
は従来例の断面図である。 13……羽根車 14……遮水板 15……永久磁石 18……磁気センサ 26……断熱板 27……放熱材FIG. 1 is a cross-sectional view of an embodiment of a high temperature electronic type flow meter according to the present invention, FIG. 2 is a perspective view of a magnetic sensor holding portion, and FIGS. 3 to 6 are enlarged views of various other embodiments. Sectional view, Fig. 7 is No. 6
FIG. 8 is a perspective view of a case-shaped heat radiating material in the embodiment shown in FIG. 13 …… Impeller 14 …… Water shield 15 …… Permanent magnet 18 …… Magnetic sensor 26 …… Insulation plate 27 …… Heat dissipation material
Claims (3)
し、その羽根車に取り付けた永久磁石で磁気センサをオ
ン、オフして前記通過流量を測定する高温用電子式流量
計において、 前記永久磁石と前記磁気センサとの間に遮水板とともに
真空空間を設けてなる高温用電子式流量計。1. An electronic flow meter for high temperature, wherein an impeller is rotated according to a passing flow rate of high-temperature water, and a permanent magnet attached to the impeller turns a magnetic sensor on and off to measure the passing flow rate. A high temperature electronic type flow meter, wherein a vacuum space is provided together with a water shield between the permanent magnet and the magnetic sensor.
板が設けられている請求項１記載の高温用電子式流量
計。2. The high temperature electronic flow meter according to claim 1, wherein a heat insulating plate is provided between the water shield plate and the magnetic sensor.
材が設けられている請求項１記載の高温用電子式流量
計。3. A high temperature electronic flowmeter according to claim 1, wherein a heat radiating material is provided between the water shield plate and the magnetic sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4790590U JPH084572Y2 (en) | 1990-05-08 | 1990-05-08 | High temperature electronic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4790590U JPH084572Y2 (en) | 1990-05-08 | 1990-05-08 | High temperature electronic flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH047318U JPH047318U (en) | 1992-01-23 |
| JPH084572Y2 true JPH084572Y2 (en) | 1996-02-07 |
Family
ID=31564248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4790590U Expired - Fee Related JPH084572Y2 (en) | 1990-05-08 | 1990-05-08 | High temperature electronic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084572Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007071571A (en) * | 2005-09-05 | 2007-03-22 | Ricoh Elemex Corp | High-temperature service electronic type flowmeter |
-
1990
- 1990-05-08 JP JP4790590U patent/JPH084572Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007071571A (en) * | 2005-09-05 | 2007-03-22 | Ricoh Elemex Corp | High-temperature service electronic type flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH047318U (en) | 1992-01-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |