JPH0224323U

JPH0224323U -

Info

Publication number: JPH0224323U
Application number: JP10157388U
Authority: JP
Priority date: 1988-07-29
Filing date: 1988-07-29
Publication date: 1990-02-19

Description

[Brief explanation of drawings]

第１図は、この考案によるオリフイス式流量計
の構成を概略的に示す図、第２図、第３図は可変
形オリフイスの構成を示す図で第２図は上流側か
ら見た図であり、第３図は下流側から見た図であ
る。１……流路、２，３……圧力センサ、４……流
量計測器、５……信号発生器、６……比較器、７
……サーボモータ、８……ロータリエンコーダ、
９……減算器、１１……計算器、１３……表示器
、ＫＲ……可変形オリフイス、Ｂ……揺動板、Ｐ
Ｇ……ピニオン歯車、Ｐ_１〜Ｐ_６……ピン、Ｓ…
…出力軸、Ｗ……ウオーム、ＲＬ……環状ラツク
、Ｋ……環枠。 Figure 1 is a diagram schematically showing the configuration of the orifice type flowmeter according to this invention, Figures 2 and 3 are diagrams showing the configuration of the variable orifice, and Figure 2 is a diagram seen from the upstream side. , FIG. 3 is a view seen from the downstream side. 1... Flow path, 2, 3... Pressure sensor, 4... Flow rate measuring device, 5... Signal generator, 6... Comparator, 7
... Servo motor, 8 ... Rotary encoder,
9... Subtractor, 11... Calculator, 13... Display, KR... Variable orifice, B... Rocking plate, P
G...Pinion gear, _P1 to _P6 ...Pin, S...
...output shaft, W...worm, RL...annular rack, K...ring frame.

Claims

[Scope of utility model registration request]

In a flow meter that determines the differential pressure between the front and back sides of an orifice installed in a flow path and measures the flow rate from this differential pressure value, the orifice is configured with a variable orifice whose opening area can be changed, and the variable orifice A servo motor for variably driving the variable orifice, a drive mechanism that varies the variable orifice by the output of the servo motor, and a drive mechanism that compares the differential pressure value with a constant value and sends this comparison output to the servo motor. An orifice type flowmeter characterized in that it is equipped with a feedback control system for input, and measures the flow rate with a constant differential pressure value regardless of the magnitude of the flow rate.