CN209803039U - Testing device for combustible gas explosion flow field in confined space under water storage condition - Google Patents

Abstract

The utility model discloses a confined space combustible gas explosion flow field testing device under water storage condition, which comprises a pipeline system, a water supply system, a gas distribution system, an ignition control system and a data acquisition system; the pipeline system is formed by connecting five sections of pipelines in sequence to form a closed constraint space, a pair of pressure sensors and temperature sensors are respectively installed at the center of the top of each section of pipeline, the four sections of pipelines at the end parts are made of steel materials, a round transparent window is installed at the center right in front of each section of pipeline, the middle section of pipeline is made of transparent explosion-proof glass, and high-speed cameras are arranged at the positions corresponding to the round transparent window and the transparent explosion-proof glass. The gas explosion experiment under the coexistence condition of water storage and combustible gas in the confined space can be carried out, and the process monitoring of explosion pressure, temperature and flame can be realized.

Description

Test device for combustible gas explosion flow field in confined space under water storage conditions

technical field

The utility model relates to a combustible gas explosion flow field test technology, in particular to a combustible gas explosion flow field test device in a confined space under water storage conditions.

Background technique

The research on gas explosion has a prominent position in the field of safety engineering, especially when it involves issues such as risk assessment and safety protection of urban public infrastructure, it has attracted the attention of the society. At present, gas explosion in confined space is a research hotspot, but the research on gas explosion catastrophe evolution process and disaster prevention technology in confined space is lagging behind, and a series of urban underground confined space gas explosion accidents have occurred in recent years, especially worthy of attention. On November 22, Qingdao City, Shandong Province, the Sinopec Donghuang underground oil pipeline leaked and exploded. Volatile oil and gas accumulated in the municipal drainage culvert and sparked and exploded, killing 62 people and injuring 136 people. The direct economic loss was nearly 752 million yuan; In 2014, the "8.1" underground gas pipeline leaked and exploded in Kaohsiung, Taiwan, China. The leaked gas diffused along the drainage box culvert and exploded when encountering a heat source, killing 30 people and injuring 310 people. The above-mentioned major accidents all belong to the gas explosion accidents that occurred in the confined space where explosive gas and water storage coexist.

At present, researchers have carried out the effect of fine water mist in the confined space on the explosion characteristics of combustible gas. However, the municipal sewage space is a comprehensive system where combustible gas and water storage coexist. There are fundamental differences in the water mist in the research, and there is no corresponding test device and method for combustible gas explosions in confined spaces under water storage conditions, which restricts the development of disaster-causing mechanisms and safety protection of gas explosions in urban underground confined spaces. Research.

Utility model content

The purpose of the utility model is to provide a test device for combustible gas explosion flow field in a confined space under water storage conditions.

The purpose of this utility model is achieved by the following technical solutions:

The device for testing combustible gas explosion flow field in confined space under water storage conditions of the present utility model includes five parts: pipeline system, water supply system, gas distribution system, ignition control system, and data acquisition system;

The pipeline system is connected in turn by the first section of pipeline, the second section of pipeline, the third section of pipeline, the fourth section of pipeline and the fifth section of pipeline to form a closed confined space, and a pair of pressure sensors are respectively installed at the center of the top of each section of pipeline and temperature sensor, the first section of pipeline, the second section of pipeline, the fourth section of pipeline and the fifth section of pipeline are steel materials, and a circular transparent window is installed at the center of each section of pipeline, and the third section The pipeline is transparent explosion-proof glass, and a high-speed camera is installed at the position corresponding to the circular transparent window and the transparent explosion-proof glass.

It can be seen from the above-mentioned technical solutions provided by the utility model that the test device for combustible gas explosion flow field in a confined space under the condition of water storage provided by the embodiment of the utility model can carry out gas explosion under the coexistence of water storage and combustible gas in a confined space Experiment, and can realize the process monitoring of explosion pressure, temperature and flame.

Description of drawings

Fig. 1 is a schematic structural diagram of a test device for a combustible gas explosion flow field in a confined space under water storage conditions provided by an embodiment of the utility model.

In the picture:

1-first section of pipeline; 2-second section of pipeline; 3-third section of pipeline; 4-fourth section of pipeline; 5-fifth section of pipeline; 6-pressure sensor and temperature sensor; 7-circular transparent window; 8-High-speed camera; 9-Transparent explosion-proof glass; 10-Ignition rod; 11-Pressure gauge; 12-Water injection/water outlet; 13-Valve; 14-Vacuum pump; Valve; 18-water tank; 19-computer; 20-ignition system; 21-pressure temperature acquisition system; 22-flame acquisition system.

Detailed ways

The embodiments of the present utility model will be further described in detail below. The content not described in detail in the embodiment of the utility model belongs to the prior art known to those skilled in the art.

The preferred specific implementation of the device for testing the explosive flow field of combustible gas in a confined space under water storage conditions of the present invention is shown in Figure 1:

Including pipeline system, water supply system, gas distribution system, ignition control system and data acquisition system;

The pipeline system is sequentially connected by the first section of pipeline 1, the second section of pipeline 2, the third section of pipeline 3, the fourth section of pipeline 4, and the fifth section of pipeline 5 to form a closed confined space. A pair of pressure sensors and temperature sensors 6 are installed, and the first section of pipeline 1, the second section of pipeline 2, the fourth section of pipeline 4 and the fifth section of pipeline 5 are made of steel materials, and are installed at the center position directly in front of each section of pipeline A circular transparent window 7, the third section of the pipeline 3 is a transparent explosion-proof glass 9, and a high-speed camera 8 is provided at a position corresponding to the circular transparent window 7 and the transparent explosion-proof glass 9.

The water supply system includes a water tank 18, and the water tank 18 is connected to the water injection port/water discharge port 12 provided on the pipeline system through a valve 17.

The gas distribution system includes a pressure gauge 11, a vacuum pump 14, and a combustible gas cylinder 16. The vacuum pump 14 and the combustible gas cylinder 16 are respectively connected to the fifth section of pipeline 5 through a valve, and the pressure gauge 11 is located at the On the first section of pipeline 1.

The ignition control system includes a computer 19 , an ignition system 20 and an ignition rod 10 . The ignition rod 10 is mounted on the first section of pipeline 1 and connected to the computer 19 through the ignition system 20 .

Described data acquisition system comprises pressure temperature acquisition system 21 and flame acquisition system 22, and described high-speed camera 8 is connected with described computer 19 by described flame acquisition system 22, and described pressure sensor and temperature sensor 6 are collected by described pressure temperature. A system 21 is connected to said computer 19 .

The pressure of the pipeline system is not lower than 2MPa, each section of pipeline is 0.8m long, the cross section of the pipeline is square, and its side length is 0.1m, and the diameter of the circular transparent window 7 is 3cm.

The above-mentioned method for testing a combustible gas explosion flow field test device in a confined space under water storage conditions includes steps:

A. Installation and commissioning of test equipment: install and connect the pipeline system, water supply system, gas distribution system, ignition control system, and data acquisition system, and debug each part to ensure that the pipeline is well sealed and that each system can operate normally;

B. Water injection in the pipeline: open the valve 17, inject the water in the water tank 18 into the pipeline through the water injection port/water discharge port 12, determine the water injection amount by observing the transparent explosion-proof glass 9, and close the valve 17 to stop water injection when the predetermined water injection amount is reached;

C. Vacuuming in the pipeline: open the valve 13, start the vacuum pump 14, vacuumize the pipeline system, observe the pressure change in the pipeline through the pressure gauge 11, stop the vacuum pump 14 and close the valve 13 when the set pressure is reached, and the vacuuming ends;

D. Gas distribution in the pipeline: open the valve 15, fill the gas in the combustible gas cylinder 16 into the pipeline based on the partial pressure method, observe the pressure change in the pipeline through the pressure gauge 11, close the valve 15 when the predetermined pressure is reached, and turn the pipeline Stand for a period of time to ensure that the combustible gas is fully mixed with the air in the pipeline and evenly distributed in the pipeline;

E. Ignition: Control the ignition system 20 through the computer 19, set a certain ignition energy and ignition delay time, so that the high-voltage discharge of the ignition rod 10 generates an electric spark, and ignites the combustible gas in the pipeline;

F, data acquisition: after ignition, gather the explosion pressure and temperature data of each section pipeline by computer 19, pressure temperature acquisition system 21, pressure sensor and temperature sensor 6, gather explosion flame by computer 19, flame acquisition system 22, high-speed camera 8 Propagate to the data when circular transparent window 7, transparent explosion-proof glass 9, and the data collected are saved to computer 19;

G. Turn off the power and test the system;

H. Drain water from the pipeline: open the valve 17 to drain the remaining water in the pipeline after the explosion;

I, data analysis: arrange and analyze the explosion pressure, temperature, and flame data recorded by computer 19.

The utility model discloses a combustible gas explosion flow field test device in a confined space under water storage conditions, which can carry out gas explosion experiments under the coexistence of water storage and combustible gas in a confined space, and can realize the process monitoring of explosion pressure, temperature and flame.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (6)

1. A test device for combustible gas explosion flow field in confined space under water storage conditions, characterized in that it includes five parts: pipeline system, water supply system, gas distribution system, ignition control system, and data acquisition system; The pipeline system is sequentially connected by the first section of pipeline (1), the second section of pipeline (2), the third section of pipeline (3), the fourth section of pipeline (4), and the fifth section of pipeline (5) to form an airtight constraint space, a pair of pressure sensors and temperature sensors (6) are respectively installed at the top center of each section of pipeline, and the first section of pipeline (1), the second section of pipeline (2), the fourth section of pipeline (4) and the fifth section of pipeline Section pipelines (5) are steel materials, and a circular transparent window (7) is installed at the center position directly in front of each section pipeline, and the third section pipeline (3) is transparent explosion-proof glass (9), corresponding to the circular The positions of the transparent window (7) and the transparent explosion-proof glass (9) are provided with a high-speed camera (8). 2. the confined space flammable gas explosion flow field test device under the water storage condition according to claim 1, is characterized in that, described water supply system comprises water tank (18), and described water tank (18) is connected with device through valve (17). A water injection/discharge (12) connection on the piping system. 3. the confined space combustible gas explosion flow field test device under the water storage condition according to claim 2, is characterized in that, described gas distribution system comprises pressure gauge (11), vacuum pump (14), combustible gas cylinder (16 ), the vacuum pump (14) and the combustible gas cylinder (16) are respectively connected to the fifth section pipeline (5) through a valve, and the pressure gauge (11) is arranged on the first section pipeline (1) . 4. the confined space combustible gas explosion flow field testing device under the water storage condition according to claim 3, is characterized in that, described ignition control system comprises computer (19), ignition system (20) and ignition rod (10), The ignition rod (10) is mounted on the first pipeline (1) and connected with the computer (19) through the ignition system (20). 5. the confined space combustible gas explosion flow field testing device under the water storage condition according to claim 4, is characterized in that, described data acquisition system comprises pressure temperature acquisition system (21) and flame acquisition system (22), and described The high-speed camera (8) is connected with the computer (19) through the flame acquisition system (22), and the pressure sensor and temperature sensor (6) are connected with the computer (19) through the pressure temperature acquisition system (21) connect. 6. The test device for combustible gas explosion flow field in a confined space under water storage conditions according to claim 5, wherein each section of the pipeline system is 0.8m long, the section of the pipeline is square, and its side length is 0.1m , the diameter of the circular transparent window (7) is 3cm.