Back-purging device for measuring gas pipeline

A gas pipeline and back-purging technology, applied in valve operation/release device, valve device, gas/liquid distribution and storage, etc., can solve the problem of weak purging force of constant-current micro-positive pressure purging device

Active Publication Date: 2020-08-11
XIAN JINGZHAO POWER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3) Constant flow micro-positive pressure purge device installed on the measuring gas pipeline: The constant-flow micro-posit

Method used

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  • Back-purging device for measuring gas pipeline
  • Back-purging device for measuring gas pipeline
  • Back-purging device for measuring gas pipeline

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Experimental program
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Embodiment Construction

[0049] A back-purging device for measuring gas pipelines provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Such as figure 1 , is a schematic diagram of a back-purging device system for measuring gas pipelines provided by the present invention, including a valve island 100, a normally open solenoid valve 300, a normally closed solenoid valve 200, a measuring gas volume / pressure transmitter 400, Blockage monitoring pressure gauge (not shown in figure) and device controller (not shown in figure).

[0051] The structure of the valve island 100:

[0052] Such as figure 1 and Figure 4-10 , the valve island 100 includes a valve island body 100A and a purge gas pipeline, a measurement gas pipeline, a measurement gas circular groove 111 and a purge gas circular groove 108;

[0053] The measurement gas pipeline includes a measurement gas inlet pipeline (including 103 and 105) and a meas...

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Abstract

The invention provides a back-purging device for a measuring gas pipeline. A normally-open electromagnetic valve with the diameter of a measuring gas butt-joint inlet larger than that of a measuring gas butt-joint outlet of the measuring gas butt-joint inlet and a normally-closed electromagnetic valve with the large drift diameter design of a purging gas inlet pipeline and the small drift diameterdesign of a purging gas outlet pipeline are mainly adopted, and meanwhile the fact that the pressure (1MPa or below) of purging gas is far larger than the pressure (8KPa or below) of measuring gas isingeniously utilized; reliable isolation and sealing of the normally-closed electromagnetic valve on the measuring gas in the measuring gas pipeline are achieved through the powerful pressure effectof the purging gas in the purging gas inlet pipeline in the normal measuring state, and reliable isolation and sealing of the normally-open electromagnetic valve on the measuring gas in the measuringgas outlet pipeline are achieved through the powerful pressure effect of the purging gas entering the measuring gas inlet pipeline in the purging measuring state; and the normally-closed electromagnetic valve is instantly opened, and the gas measuring work of the device in the normal measuring state and the purging measuring state is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of gas control, and relates to a back-purging device, in particular to a back-purging device for measuring gas pipelines. Background technique [0002] Air volume / wind pressure measurement is a very important monitoring indicator in industrial boilers, such as thermal power plants, metallurgy, coal chemical industry, etc., even based on the differential pressure air volume monitoring principle air volume transmitter / constant pressure wind pressure monitoring principle The air volume / wind pressure measuring device works in a dusty environment for a long time. If there is no traceless anti-blocking and blowing, it will not work normally for a long time; the main reasons for the blockage of the air volume / wind pressure measuring device are: 1) The pressure pipe of the measuring device 2) The airtightness of the pressure introduction pipeline (measurement gas pipeline) of the measuring device is poor, resulting ...

Claims

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Application Information

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IPC IPC(8): F17D1/02F17D3/01F17D5/00F16K1/00F16K1/32F16K27/02F16K31/06F16K37/00
CPCF17D1/02F17D3/01F17D5/00F16K1/00F16K1/32F16K27/029F16K31/0655F16K31/0675F16K37/0091
Inventor 蔡宽平
Owner XIAN JINGZHAO POWER TECH
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