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Pressure Transmitter

A transmission device and pressure sensor technology, which is applied in the direction of measuring device, measuring fluid pressure, pressure difference measurement between multiple valves, etc., can solve the problems of pressure transmission characteristic deterioration, achieve long-term maintenance of pressure transmission characteristics, prevent intrusion, Effect of suppressing generation of gas

Active Publication Date: 2015-04-29
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the generated gas exceeds the solubility of the filling liquid, it will be bubbled, so the pressure transmission characteristics in the pressure transmission device will deteriorate

Method used

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Experimental program
Comparison scheme
Effect test

no. 2 Embodiment approach

[0022] 2. Second Embodiment (Pressure Transmitter for Absolute Pressure Measurement)

[0023] 3. Third Embodiment (Pressure Transmission Device Equipped with Intermediate Diaphragm)

[0024] 4. Fourth Embodiment (Application Example of Pressure Transmitting Device in Nuclear Energy Equipment)

no. 1 Embodiment approach 》

[0026] (Pressure transmitter for differential pressure measurement)

[0027] figure 1 It is a figure which shows the structure of the pressure transmission apparatus of 1st Embodiment. The pressure transmission device 1 shown in this figure is used for pressure measurement using the process fluid in various equipment as the measurement fluid, and measures the pressure difference between two points (high pressure side and low pressure side).

[0028]

[0029] This pressure transmission device 1 includes: a pressure guide path 11 provided corresponding to the measurement fluid Fh on the high pressure side; and a pressure guide passage 11' provided corresponding to the measurement fluid F1 on the low pressure side of the measurement fluid Fh. Filling liquid L is filled inside the pair of pressure guide passages 11, 11'. One opening of each pressure guide passage 11, 11' is closed by a pressure-receiving diaphragm 13, 13', respectively. In addition, this pressure transmission...

no. 2 Embodiment approach 》

[0082] (Pressure transmitter for absolute pressure measurement)

[0083] Image 6 It is a figure which shows the structure of the pressure transmission apparatus of 2nd Embodiment. The pressure transmission device 2 shown in the figure is used for pressure measurement using a process fluid as a measurement fluid in various devices, and is a device for absolute pressure measurement that measures the pressure of a measurement fluid F.

[0084]

[0085] The pressure transmission device 2 is used with figure 1 The pressure transmission device of the first embodiment described is different in that only one pressure receiving diaphragm 13 and one pressure guide path 11 are provided for one pressure sensor 15 . In addition, the other opening of the pressure guiding path 11 is disposed only on one side of the pressure sensor 15, and the pressure of the measurement fluid F received by the pressure receiving diaphragm 13 provided at one opening of the pressure guiding path 11 is det...

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PUM

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Abstract

A pressure transmitter (1) including tube-like pressure introducing pipes (11, 11'), a sealed-in liquid (L), the inside of the pressure introducing pipes (11, 11') being filled with the sealed-in liquid (L), pressure receiving diaphragms (13, 13') for receiving the pressures of measurement fluids (Fh, Fl), the pressure receiving diaphragms (13, 13') being set up in a state where one-side apertures in the pressure introducing pipes (11, 11') are blocked by the pressure receiving diaphragms (13, 13'), a pressure sensor (15) that is set up in common to the other-side apertures in the pressure introducing pipes (11, 11') in a state where the pressure sensor (15) is exposed to the sealed-in liquid (L), and hydrogen-permeation prevention layers (21) that are set up on the pressure receiving diaphragms (13, 13'), wherein the pressure transmitter (1) further includes a hydrogen-storage material that is set up inside the pressure introducing pipes (11, 11').

Description

technical field [0001] The present invention relates to a pressure transmission device, and in particular to a pressure transmission device preferably suitable for use in a radiation environment and a high temperature environment. Background technique [0002] The pressure transmission device transmits the pressure of the fluid borne by the diaphragm to the pressure sensor by using the filling liquid filled in the pressure guiding path, and transmits the electrical signal detected by the pressure sensor to the outside. There are pressure transmission devices for measuring absolute pressure and measuring differential pressure. Pressure transfer device. [0003] These pressure transmitters are used for various measurements of process fluids in petroleum refining facilities including nuclear energy facilities, chemical facilities, etc., and accuracy of ±1%, for example, is required from the viewpoint of ensuring the safety of the facilities and the quality of products. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L13/06G01L9/08
CPCG01L13/026G01L19/0645G01L7/082G01L7/088
Inventor 桑名谅有田节男马场淳史伏见笃新间大辅花见英树原勋伊藤崇
Owner HITACHI LTD