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a liquid pressure gauge

A liquid manometer and dispersion technology, applied in the field of liquid manometers

Inactive Publication Date: 2016-02-03
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem in the prior art that the measurement accuracy is affected by the wall, the present invention provides a liquid pressure gauge, which can eliminate the influence of the wall and improve the measurement accuracy

Method used

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Embodiment

[0026] The utility model relates to a liquid pressure gauge. The inner tube is a U-shaped tube. The two vertical tubes of the U-shaped tube are made of stainless steel. The inner walls of the two stainless steel tubes are coated with a Teflon coating and cured at high temperature. The Teflon coating has the functions of hydrophobic and oleophobic, and the liquid medium such as water and oil in the pipe will not hang on the pipe wall.

[0027] The Teflon material used is polytetrafluoroethylene (PTFE) (commercially available)

[0028] The process of preparing the Teflon coating is as follows:

[0029] 1. First prepare the stainless steel tube for the liquid pressure gauge, remove the grease on the inner wall of the tube. The inner wall of the stainless steel tube was washed with acetone, and then heated to about 400° C. to completely volatilize the organic solvent.

[0030] 2. Use sandblasting to clean the inner wall of the pipe and make the surface rough. Specifically, 40-7...

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Abstract

The invention discloses a liquid manometer. The inner wall of the inner pipe of the liquid manometer is provided with a Teflon coating. The Teflon coating has a thickness of 10 [mu]m to 1 mm. The Teflon coating is formed by uniformly spraying Teflon on the inner wall of the pipe. The liquid manometer can help to eliminate wall built-up influence and increase measuring accuracy.

Description

technical field [0001] The invention relates to the field of pressure measurement, and more particularly, to a liquid pressure gauge. Background technique [0002] The working medium of the existing liquid pressure gauge generally includes water, ethanol, oil, mercury, etc., and the tube of the liquid pressure gauge is generally made of metal (such as stainless steel) or glass. For liquid pressure gauges whose working medium is water, ethanol or oil, these working media are infiltrated with the metal tube wall or glass tube wall, which will cause the phenomenon of hanging on the wall, that is, the liquid is attached to the tube wall, and it is difficult to flow down in a short time. This tends to create problems with the zero point change of the liquid manometer and inaccurate pressure measurements. SUMMARY OF THE INVENTION [0003] In order to solve the problem that the wall hanging affects the measurement accuracy in the prior art, the present invention provides a liqui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L19/00G01L19/06
Inventor 杨远超李燕华
Owner NAT INST OF METROLOGY CHINA
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