JPH0321735U

JPH0321735U -

Info

Publication number: JPH0321735U
Application number: JP8079089U
Authority: JP
Priority date: 1989-07-11
Filing date: 1989-07-11
Publication date: 1991-03-05

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の要部構成説明図で
、Ａは正面図、Ｂは側面図、第２図は第１図の斜
視図、第３図は第１図の要部構成説明図、第４図
、第５図、第６図は第１図の動作説明図、第７図
から第１２図は従来より一般に使用されている従
来例の構成説明図である。１１……オリフイスプレート、１２……第１の
リング、１３……第２のリング、１４……第１の
フランジ、１５……第２のフランジ、１６，１７
……差圧取出し口、１８……導圧管、１０……差
圧計本体、２１……ガスケツト、２２……第１の
導圧孔、２３……第２の導圧孔、２４……柱状部
、２５……差圧センサ本体、２６……半導体複合
センサ、２６１……差圧センサ、２６２……静圧
センサ、３０……補正回路部、３１……レイノル
ズ数演算回路、３２……流量係数補正値演算回路
、３３……補正演算回路。 Fig. 1 is an explanatory diagram of the main part configuration of an embodiment of the present invention, where A is a front view, B is a side view, Fig. 2 is a perspective view of Fig. 1, and Fig. 3 is a main part structure of Fig. 1. The explanatory diagrams, FIGS. 4, 5, and 6 are explanatory diagrams of the operation of FIG. 1, and FIGS. 7 to 12 are explanatory diagrams of the configuration of a conventional example that has been generally used. 11... Orifice plate, 12... First ring, 13... Second ring, 14... First flange, 15... Second flange, 16, 17
... Differential pressure outlet, 18 ... Pressure pipe, 10 ... Differential pressure gauge body, 21 ... Gasket, 22 ... First pressure guide hole, 23 ... Second pressure guide hole, 24 ... Column shaped part , 25...Differential pressure sensor body, 26...Semiconductor composite sensor, 261...Differential pressure sensor, 262...Static pressure sensor, 30...Correction circuit section, 31...Reynolds number calculation circuit, 32...Flow coefficient Correction value calculation circuit, 33...Correction calculation circuit.

Claims

[Claims for Utility Model Registration] A device comprising an orifice plate and first and second block bodies that sandwich the orifice plate, and based on a differential pressure signal between measured fluid pressures of the first and second block bodies. , a differential pressure measuring device for calculating the flow rate of a measuring fluid, comprising: a first pressure guiding hole provided through the first block body and taking out the measured pressure on the side of the first block body; the orifice plate and the first pressure guiding hole; a second pressure guiding hole that is provided through the first and second block bodies and takes out the measured pressure on the second block body side from the first block body; Connected to the first
a columnar part integrally constructed with the block body; a differential pressure sensor body integrally constructed with the columnar part and the first block body; a semiconductor composite sensor that detects the static pressure and the differential pressure between the two pressure-conducting holes; a temperature sensor provided in the columnar part that detects temperature; and a difference between the temperature signal from the temperature sensor and the semiconductor composite sensor. A Reynolds number calculation circuit that calculates a flow rate coefficient by calculating the Reynolds number based on pressure and static pressure signals, and a flow rate coefficient correction value calculation circuit that calculates a flow rate coefficient correction value from the flow rate coefficient and a preset flow rate coefficient. A differential pressure measuring device comprising: a circuit; and a correction calculation circuit that corrects the differential pressure signal using the flow coefficient correction value.