JPH0171638U - - Google Patents
Info
- Publication number
- JPH0171638U JPH0171638U JP1987168251U JP16825187U JPH0171638U JP H0171638 U JPH0171638 U JP H0171638U JP 1987168251 U JP1987168251 U JP 1987168251U JP 16825187 U JP16825187 U JP 16825187U JP H0171638 U JPH0171638 U JP H0171638U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- diaphragm
- liquid
- seal
- sealed
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Description
第１図及び第２図はそれぞれ本考案の一実施例
及び従来の液面発信器の各縦断面図で、第３図は
液面測定の原理説明図である。
３……第１シールダイヤフラム、４……第２シ
ールダイヤフラム、５……検出ダイヤフラム、６
……第１液封室、６ａ……第１封入液、７……第
２液封室、７ａ……第２封入液、１４……受圧ダ
イヤフラム、１６……連通空所、１６ａ……第３
封入液、１８……変位検出部、１８ａ……検出信
号、１９，２５……液面発信器、Ｐ１，Ｐ２……
圧力。
1 and 2 are longitudinal cross-sectional views of an embodiment of the present invention and a conventional liquid level transmitter, respectively, and FIG. 3 is a diagram illustrating the principle of liquid level measurement. 3...First seal diaphragm, 4...Second seal diaphragm, 5...Detection diaphragm, 6
...First liquid sealing chamber, 6a...First sealed liquid, 7...Second liquid sealing chamber, 7a...Second sealed liquid, 14...Pressure receiving diaphragm, 16...Communication cavity, 16a...No. 3
Filled liquid, 18...Displacement detection section, 18a...Detection signal, 19, 25...Liquid level transmitter, P1 , P2 ...
pressure.
Claims (1)
ラムを介して加えられる第１圧力を検出ダイヤフ
ラムの一面に作用させる第１液封室と、第２封入
液が封入されかつ第２シールダイヤフラムを介し
て加えられる第２圧力を前記検出ダイヤフラムの
他面に作用させる第２液封室と、第３封入液が封
入されかつ受圧ダイヤフラムを介して加えられる
第３圧力を前記第２圧力として前記第２シールダ
イヤフラムに作用させる第３液封室と、前記第１
圧力と前記第３圧力との差圧に応じて変位する前
記検出ダイヤフラムの変位を検出する変位検出部
とを備え、前記第１、第２及び第３液封室の各容
積をＶ１０，Ｖ２０及びＶ３０とし、前記第１、
第２及び第３封入液の各熱膨脹係数をＢ１，Ｂ２
及びＢ３とし、前記第１及び第２シールダイヤフ
ラムの各圧力容量係数をΦ１及びΦ２として、前
記受圧ダイヤフラムの圧力容量係数をΦ３とした
時、下式 Φ１Ｖ１０Ｂ１＝Φ２Ｖ２０Ｂ２＋Φ３Ｖ
３０Ｂ３ を満足するようにΦ１，Φ２及びΦ３を設定した
ことを特徴とする信号伝送器。[Claims for Utility Model Registration] A first liquid sealing chamber in which a first sealed liquid is sealed and in which a first pressure applied via a first seal diaphragm acts on one surface of the detection diaphragm, and a second sealed liquid is sealed in the chamber. and a second liquid sealed chamber for applying a second pressure applied via a second seal diaphragm to the other surface of the detection diaphragm; a third liquid seal chamber that acts on the second seal diaphragm as a second pressure;
and a displacement detection section that detects the displacement of the detection diaphragm that is displaced according to the differential pressure between the pressure and the third pressure, and the respective volumes of the first, second, and third liquid seal chambers are set to V 10 and V 10 . 20 and V 30 , and the first,
The coefficients of thermal expansion of the second and third filled liquids are B 1 and B 2
and B 3 , the pressure capacity coefficients of the first and second seal diaphragms are Φ 1 and Φ 2 , and the pressure capacity coefficient of the pressure receiving diaphragm is Φ 3 , then the following formula Φ 1 V 10 B 1 = Φ 2 V 20 B 2 +Φ 3 V
A signal transmitter characterized in that Φ 1 , Φ 2 and Φ 3 are set to satisfy 30 B 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168251U JPH0171638U (en) | 1987-11-02 | 1987-11-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168251U JPH0171638U (en) | 1987-11-02 | 1987-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0171638U true JPH0171638U (en) | 1989-05-12 |
Family
ID=31457265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987168251U Pending JPH0171638U (en) | 1987-11-02 | 1987-11-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0171638U (en) |
-
1987
- 1987-11-02 JP JP1987168251U patent/JPH0171638U/ja active Pending
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