阅读说明：本技术 基于置障条件下天然气长输管道喷射火研究的实验装置 (experimental device for natural gas long-distance pipeline jet fire research based on put under barrier condition ) 是由 李玉星 刘翠伟 王武昌 胡其会 韩辉 王少雄 李安琪 崔兆雪 廖艺涵 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种基于置障条件下天然气长输管道喷射火研究的实验装置,包括天然气供给系统、实验燃烧系统、障碍物测试实验系统、通用实验风洞系统、实验测量装置系统、数据采集及处理系统和控制系统。本公开通过改变障碍物的相关参数,来研究障碍物对火焰传播的影响,分析火灾危害范围,进而求出火灾安全距离,该方法用于天然气泄漏点火燃烧实验中,具有多变量可单独控制、可远程控制、数据自动采集、实验时间短、实验可重复性高、费用低、安全性高的优点。(The invention discloses an experimental device for researching natural gas long-distance pipeline fire injection based on obstacle-placing conditions, which comprises a natural gas supply system, an experimental combustion system, an obstacle testing experimental system, a general experimental wind tunnel system, an experimental measuring device system, a data acquisition and processing system and a control system. The method is used for a natural gas leakage ignition combustion experiment, and has the advantages of multivariable independent control, remote control, automatic data acquisition, short experiment time, high experiment repeatability, low cost and high safety.)

1. The utility model provides an experimental apparatus based on put long pipeline of natural gas and spout fire research under the barrier condition which characterized in that: comprises that

the natural gas supply system is used for providing a gas source and pressure for the experimental device;

An experimental combustion system for simulating a leaking combustion of natural gas;

The barrier test experiment system is used for arranging barriers with different parameters at a natural gas combustion outlet;

The universal experiment wind tunnel system is used for simulating a natural environment and providing external conditions for leakage combustion of natural gas;

The experimental measurement device system comprises monitoring point arrays arranged on the periphery of the experimental device and used for detecting the temperature and radiation in the natural gas leakage combustion process;

The data acquisition and processing system is used for acquiring relevant parameters in the natural gas leakage combustion process in real time and analyzing the data; and

And the control system is used for controlling the universal experiment wind tunnel system and the data acquisition and processing system.

2. The experimental device for researching the natural gas long-distance pipeline jet fire under the barrier-placing condition as claimed in claim 1, wherein the natural gas supply system comprises a natural gas cylinder, a pressure gauge and a pressure reducing valve which are arranged at the outlet of the natural gas cylinder.

3. The experimental device for researching the natural gas long-distance pipeline jet fire under the obstacle-placing condition as claimed in claim 1, wherein the experimental combustion system comprises an ignition system, a combustion nozzle and a nozzle tripod for placing the combustion nozzle, wherein the combustion nozzle is used for simulating a leakage hole of natural gas.

4. The experimental device for researching the natural gas long-distance pipeline fire injection under the obstacle-placing condition as claimed in claim 1, wherein the obstacle testing experimental system comprises various experimental obstacles and obstacle tripods for placing the obstacles.

5. The experimental device for the natural gas long-distance pipeline fire injection research based on the obstacle avoidance condition as claimed in claim 1, wherein the experimental wind tunnel system is used for simulating evaporation, diffusion and leakage of natural gas in an atmospheric near-ground boundary layer, so that the humidity, temperature, radiation and wind speed are controllable, and the adjusting test section of the experimental wind tunnel system is transparent.

6. The experimental device for researching the natural gas long-distance pipeline fire injection under the obstacle-placing condition as claimed in claim 1, wherein the monitoring point array is composed of a series of monitoring points distributed on the obstacle surface and in different horizontal areas around the obstacle surface, a thermocouple, a radiometer and a corresponding thermocouple position regulator and radiometer position regulator are arranged on each monitoring point at the same time, and detection signals of the monitoring points are collected to a data acquisition and processing system for data recording and storage.

7. The experimental device for researching the natural gas long-distance pipeline jet fire under the obstacle-placing condition as claimed in claim 6, wherein the thermocouple position regulator and the radiometer position regulator adopt a lifting platform with rotation for regulating the position and the height of a placed object.

8. The experimental device for the research on the fire sprayed by the long natural gas pipeline under the obstacle-surmounting condition according to claim 1, wherein the data acquisition and processing system comprises a signal processor, and an acquisition card and a high-speed camera which are respectively connected with the signal processor, wherein the acquisition card is used for acquiring experimental parameters of the general experimental wind tunnel system, and the high-speed camera is used for shooting flame images under each experimental adjustment.

9. the experimental device for researching the fire sprayed from the long-distance natural gas pipeline under the obstacle-surmounting condition as claimed in claim 1, wherein the control system comprises a control valve, a display instrument and a control terminal, and the display instrument displays the parameter data transmitted from the data acquisition and processing system in real time and is connected to the control terminal.

10. The experimental device for researching the natural gas long-distance pipeline jet fire under the barrier condition as claimed in claim 1, wherein the experimental device is provided with a methane concentration detector, and an odorant, namely, ethanethiol, is added into fuel of the methane concentration detector.

Technical Field

The utility model belongs to the technical field of natural gas long distance pipeline safety evaluation, especially, relate to an experimental apparatus based on natural gas long distance pipeline jet fire research under putting barrier condition.

Background

in the existing research on fire safety technology of the long natural gas pipeline, barriers such as vegetation, houses and equipment often exist in the laying place of the long natural gas pipeline, or mountainous areas and ravines, and the spreading of flames is very complicated under the situation. Therefore, the research on the leakage combustion of the natural gas pipeline under the condition of the existence of the obstacles is closer to the reality and has more important practical significance, and the research becomes the focus of the attention of researchers at home and abroad.

According to the research inventor of the existing natural gas leakage combustion research device at home and abroad, the research on the natural gas leakage combustion technology, particularly the natural gas combustion flame under the condition of obstacles, at home and abroad is basically in a blank state. At present, the research is mainly used for researching natural gas combustion experiments under a single condition, a universal small-sized experiment platform is not formed, and simulation research can be carried out on the characteristics and the action mechanism of natural gas combustion fire by different factors.

In summary, current small scale experimental studies on natural gas leak combustion are not comprehensive, and therefore the present disclosure contemplates an experimental setup for natural gas pipeline combustion under barrier conditions.

Disclosure of Invention

The utility model aims at providing an experimental apparatus based on put long pipeline of natural gas and spout fire research under the barrier condition.

In order to achieve the purpose, the technical scheme of the disclosure is as follows:

an experimental device for natural gas long-distance pipeline fire injection research based on obstacle-placing condition comprises

The natural gas supply system is used for providing a gas source and pressure for the experimental device;

An experimental combustion system for simulating a leaking combustion of natural gas;

The barrier test experiment system is used for arranging barriers with different parameters at a natural gas combustion outlet;

The universal experiment wind tunnel system is used for simulating a natural environment and providing external conditions for leakage combustion of natural gas;

The experimental measurement device system comprises a monitoring point array arranged on one side of the experimental device and used for detecting the temperature and radiation of monitoring points in the natural gas leakage combustion process;

The data acquisition and processing system is used for acquiring relevant parameters in the natural gas leakage combustion process in real time and analyzing the data; and

And the control system is used for controlling the universal experiment wind tunnel system and the data acquisition and processing system.

Further, the natural gas supply system comprises a natural gas cylinder, and a pressure gauge and a pressure reducing valve which are arranged at the outlet of the natural gas cylinder.

Further, the experimental combustion system comprises an ignition system, a combustion nozzle and a nozzle tripod for placing the combustion nozzle, wherein the combustion nozzle is used for simulating a leakage hole of natural gas.

Further, the obstacle testing experiment system comprises various experimental obstacles and obstacle tripods for placing the obstacles.

Furthermore, the general experiment wind tunnel system is used for simulating the evaporation diffusion leakage of natural gas in the boundary layer of the atmosphere close to the ground, so that the humidity, the temperature, the radiation and the wind speed are controllable, and the adjustment test section of the experiment wind tunnel system is transparent.

Furthermore, the monitoring point array is composed of a series of monitoring points distributed on the barrier surface and in different horizontal areas around the barrier surface, each monitoring point is simultaneously provided with a thermocouple, a radiometer, a corresponding thermocouple position regulator and a corresponding radiometer position regulator, and detection signals of the monitoring points are collected to a data acquisition and processing system for data recording and storage.

furthermore, the thermocouple position regulator and the radiometer position regulator adopt a lifting platform with a rotary belt and are used for regulating the position and the height of a placed object.

Further, the data acquisition and processing system comprises a signal processor, and an acquisition card and a high-speed camera which are respectively connected with the signal processor, wherein the acquisition card is used for acquiring experiment parameters of the universal experiment wind tunnel system, and the high-speed camera is used for shooting flame images under each experiment adjusting piece.

Furthermore, the control system comprises a control valve, a display instrument and a control terminal, wherein the display instrument displays the parameter data transmitted by the data acquisition and processing system in real time and is connected to the control terminal.

furthermore, the experimental device is provided with a methane concentration detector, and an odorous agent ethanethiol is added into fuel of the methane concentration detector.

Furthermore, the leakage amount, the leakage hole parameters and the wind speed parameters of the natural gas can be independently adjusted at will.

Compared with the prior art, the beneficial effect of this disclosure is:

(1) The device can carry out controllable and quantitative simulation experiments on natural gas leakage combustion under different conditions of natural environment, pipeline pressure, gas release rate, leakage hole shape and size, ignition time, various obstacle sizes, positions, quantity and the like.

(2) In the device, the thermocouple, the radiometer and the high-speed camera can be used for monitoring the temperature field, the radiation field and the flame geometrical shape after combustion, and the experimental data is analyzed by the measuring system and the data acquisition and processing system.

(3) The device can easily change the relevant parameters of the barrier to carry out the experiment of the influence of the barrier on the flame.

(4) the gas cylinder of the device is doped with the odorous agent ethanethiol, so that if the natural gas leaks, the leakage can be found in time, and the safety of the device equipment is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a natural gas leakage combustion experiment platform according to the present disclosure.

In fig. 1: 1-a methane gas cylinder; 2-methane pressure reducing valve; 3-glass rotameter; 4-a burner nozzle; 5-an obstacle; 6-thermocouple I; 7-thermocouple II; 8-thermocouple III; 9-thermocouple IV; 10-radiometer I; 11-radiometer II; 12-radiometer III; 13-radiometer IV; 14-thermocouple position adjuster; 15-radiometer position regulator; 16-a combustion platform; 17-acquisition card; 18-high speed camera; 19-a data acquisition and processing system; 20-a computer; 21-the pipeline.

Detailed Description

The present disclosure is further described with reference to the following detailed description of illustrative embodiments and accompanying drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.

in the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.

As one or more embodiments, the experimental device for researching the fire sprayed on the natural gas long-distance pipeline under the barrier-placing condition comprises

The natural gas supply system is used for providing a gas source and pressure for the experimental device;

An experimental combustion system for simulating a leaking combustion of natural gas;

The barrier test experiment system is used for arranging barriers with different parameters at a natural gas combustion outlet;

The universal experiment wind tunnel system is used for simulating a natural environment and providing external conditions for leakage combustion of natural gas;

The experimental measurement device system comprises monitoring points arranged around the experimental device and used for detecting the temperature and radiation in the natural gas leakage combustion process;

the data acquisition and processing system is used for acquiring relevant parameters in the natural gas leakage combustion process in real time and analyzing the data; and

And the control system is used for controlling the universal experiment wind tunnel system and the data acquisition and processing system.

the natural gas supply system comprises a natural gas cylinder, a pressure gauge and a pressure reducing valve, wherein the pressure gauge and the pressure reducing valve are installed at the outlet of the natural gas cylinder, and an output pipeline of the pressure reducing valve is connected with a flow meter.

The experimental combustion system is connected with a natural gas supply system.

The experimental combustion system comprises an ignition system, a combustion nozzle and a nozzle tripod for placing the combustion nozzle, wherein the combustion nozzle is used for simulating a leakage hole of natural gas.

The obstacle testing experiment system comprises various experimental obstacles and obstacle tripods for placing the obstacles.