A back-purging device for measuring gas pipelines

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: 2022-08-02
XIAN JINGZHAO POWER TECH
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  • Summary
  • 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-positive pressure purge device has weak purging power, which can only delay the clogging of the device but cannot fundamentally solve it

Method used

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  • A back-purging device for measuring gas pipelines
  • A back-purging device for measuring gas pipelines
  • A back-purging device for measuring gas pipelines

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

[0051] The structure of the valve island 100:

[0052] like figure 1 and Figure 4-10 , the valve island 100 includes a valve island body 100A and is provided with 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), a measurement gas ...

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Abstract

The back-purging device for the measurement gas pipeline provided by the present invention mainly adopts a normally open solenoid valve whose diameter of the butt inlet of the measurement gas is larger than the diameter of the butt outlet of the measurement gas, and a large-diameter design of the purging gas inlet pipeline and the purging gas The normally closed solenoid valve with small diameter design of the outlet pipeline, and at the same time cleverly use the purge gas pressure (1MPa and below) far greater than the measurement gas pressure (8KPa and below); no matter in the normal measurement state, the purge gas inlet pipeline is The strong pressure action of the middle purge gas realizes the reliable isolation and sealing of the measurement gas in the measurement gas pipeline by the normally closed solenoid valve, or the strong pressure action of the purge gas entering the measurement gas inlet pipeline in the purge measurement state. The open solenoid valve reliably isolates and seals the measurement gas in the measurement gas outlet pipeline, and can also ensure that the normally closed solenoid valve opens instantaneously, which ensures the safe and reliable gas measurement work of the device in the normal measurement state and the purge measurement state.

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 / air pressure measurement is a very important monitoring indicator in industrial boilers, such as thermal power plants, metallurgy, coal chemical industry, etc. Even if it is based on the principle of differential pressure air volume monitoring, the air volume transmitter / constant pressure air pressure monitoring principle If the air volume / air pressure measuring device is used for a long time in a dusty environment, it will not work properly for a long time if it lacks traceless anti-blocking purging. 2) The pressure-inducing pipeline (measurement gas pipeline) of the measuring device has poor air tightness, resulting in a large area of ​​the leakage point from the transmitter to the pressure-inducing pipeline. [0003] The existing anti-blocking ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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