CN114858392B - System and method for testing explosion-proof and high-temperature-resistant performance of key structure in highway tunnel - Google Patents
System and method for testing explosion-proof and high-temperature-resistant performance of key structure in highway tunnel Download PDFInfo
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- CN114858392B CN114858392B CN202210448738.9A CN202210448738A CN114858392B CN 114858392 B CN114858392 B CN 114858392B CN 202210448738 A CN202210448738 A CN 202210448738A CN 114858392 B CN114858392 B CN 114858392B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/313—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by explosives
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
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- G01N2203/0075—Strain-stress relations or elastic constants
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2203/02—Details not specific for a particular testing method
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- G01N2203/02—Details not specific for a particular testing method
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Abstract
The utility model relates to an anti-explosion high-temperature resistance test system and method for a key structure in a highway tunnel, and belongs to the field of highway tunnel detection. The system comprises a model tunnel subsystem, an air supply subsystem and a DIC strain measurement subsystem; the model tunnel subsystem is a horseshoe arc, and is made of glass ceramics with a melting point of 1000 ℃; the gas supply subsystem pumps the combustible gas into the explosion chamber according to the set concentration and quantity; the DIC strain measurement subsystem adopts a non-contact optical measurement method to measure the spatial three-dimensional coordinates of an object to obtain a three-dimensional graph of a tunnel key structure, analyzes the change rule of crack width under the action of explosion impact and records images in the tunnel. The utility model can obtain real-time images of explosion, multi-field space-time distribution information during the explosion of combustible gas and strain and damage numerical simulation technology of a model tunnel structure, and can ensure that a research target is achieved and the key scientific problem is solved.
Description
Technical Field
The utility model belongs to the field of highway tunnel detection, and relates to an antiknock high-temperature resistance test system and method for a key structure in a highway tunnel.
Background
In order to obtain the parameters of the explosion resistance and high temperature resistance of the key structure in the tunnel when explosion occurs, an indoor experiment is needed, the indoor experiment has the advantages of simulating the selection of the gas leakage degree and the design of experimental devices and methods, the utility model patent (CN 207036738U) provides a tunnel roof fire resistance test system, a model is manufactured based on a prototype tunnel structure, a component is arranged above a fire furnace, the condition that the roof is affected by fire is simulated, and the fire resistance of the tunnel roof is studied. The utility model patent (CN 212254622U) provides a development and application direction test platform of a highway tunnel fire detection system, which realizes simulated fire detection by simulating fire accidents of a highway tunnel through arranging a combustion generation box, a water tank and a platform body of a tunnel model, and detects the high temperature resistance characteristic of the highway tunnel. The utility model patent (CN 110359594A) provides an anti-detonation wall structure, a construction method, a testing device and a testing method, wherein the anti-detonation wall structure is characterized in that an anti-detonation elastomer coating is coated on a wall, and the sliding condition of a scale is observed after explosion to judge the anti-detonation property of the wall. The utility model patent (CN 112880956A) provides an explosion-proof equipment testing system under the action of multiple explosion physical fields, a component to be tested is covered outside an explosive and is placed in the center of an annular target, and parameters such as shock waves, earthquake waves, temperature fields, sound pressure and the like generated by the explosive under the explosion-proof condition are measured through different testing systems. The utility model patent (CN 112240857A) provides a simulation test device for the anti-explosion impact of a firewall of an internal combustion gas cabin of an underground pipe gallery, displacement and pressure parameters generated by the firewall during explosion are measured through a sensor, and the anti-explosion performance of a component is detected.
In summary, the following disadvantages exist in the prior art:
the fire resistance testing device provided by the utility model (CN 207036738U) can only detect the fire resistance of the tunnel roof, has limited application range and cannot be used for detecting the fire resistance of other structures in the tunnel. The highway tunnel fire detection system provided by the utility model patent (CN 212254622U) develops and applies a test platform, can only detect the occurrence of fire in a tunnel, and cannot detect the tiny change of the structure of the tunnel in a fire accident by arranging a rescue scheme. The utility model patent (CN 110359594A) provides an anti-detonation wall structure, a construction method, a testing device and a testing method, wherein the anti-detonation property of the wall is obtained through deformation of the wall and survival conditions of animals, and the method has high cost and low experimental accuracy. The utility model patent (CN 112880956A) provides an explosion-proof equipment testing system under the action of multiple explosion physical fields, various parameters are obtained through explosion generation, the explosion resistance of the explosion-proof equipment is obtained by comparing the parameters after the explosion-proof equipment is weakened, and the detection method cannot detect energy which cannot pass through the explosion-proof equipment, so that parameter information in a tunnel cannot be detected. According to the simulation test device provided by the utility model patent (CN 112240857A), the pressure and displacement conditions born by the firewall are measured through the displacement measurer and the pressure measuring spring, so that the antiknock performance of the firewall is obtained, and the change of the structure of the component caused by explosion cannot be detected.
In the existing patents, only the antiknock performance is detected partly, only the high temperature resistance is detected partly, no method for simultaneously detecting the antiknock performance and the high temperature resistance is available, and the quality of the component performance is judged only by displacement and pressure, so that the change in the component structure after explosion cannot be detected. And the fire furnace and the combustion generation box simulate flames generated by explosion in the highway tunnel, so that the flames have larger difference. Besides, the existing explosion experiment has the defects of high safety requirement, poor repeatability and high cost.
Disclosure of Invention
Therefore, the utility model aims to provide an explosion-resistant and high-temperature-resistant testing system and method for a key structure in a highway tunnel, which are used for simulating the explosion condition in the tunnel and measuring and researching the explosion-resistant and high-temperature-resistant performance of the key structure in the highway tunnel, so that the performance of the key structure of the tunnel is improved to achieve the aim of reducing loss caused by explosion.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the system comprises a model tunnel subsystem, an air supply subsystem and a DIC strain measurement subsystem; the DIC strain measurement subsystem determines the deformation of the object according to the statistical correlation of the speckle fields randomly distributed on the surface of the object before and after the deformation;
the model tunnel subsystem is a horseshoe arc, and is made of microcrystalline glass with a melting point of 1000 ℃;
the gas supply subsystem pumps the combustible gas into the explosion chamber according to the set concentration and quantity;
the DIC strain measurement subsystem adopts a non-contact optical measurement method to measure the spatial three-dimensional coordinates of an object to obtain a three-dimensional graph of a tunnel key structure, analyzes the displacement and strain data of the tunnel key structure under the action of explosion impact, analyzes the change rule of crack width, and records images in the tunnel during explosion.
Optionally, the model tunnel subsystem comprises a fixed cabin and a movable cabin, and the middle is separated by a firewall;
the fixed cabin comprises a gas pipeline, a supporting pier, a hooping ring and a flowmeter;
the fixed cabin is connected with the gas supply subsystem and the movable cabin, and the amount of combustible gas entering the movable cabin is controlled;
the movable cabin comprises a telescopic pipe, an explosion chamber, a jack, a pressure test spring, a support frame, a nut, a sliding track, a member and a sliding sleeve hole;
the distance from the explosion chamber to the component is controlled by the sliding sleeve hole and the track traction;
the component is fixed in the movable cabin by a supporting frame and a jack;
a pressure test spring is arranged between the component and the supporting frame to measure the impact force of explosion on the component;
and a patch type temperature sensor is attached to the surface of the component to monitor the temperature change of the surface of the component in the explosion process, and the influence of the temperature change on the strength of the component is analyzed.
Optionally, the air supply subsystem comprises an air bottle, a pressure gauge, a pressurizing valve and a tightening ring;
the gas cylinder can store combustible gas, nitro, azo and peroxy dangerous chemicals;
the gas supply subsystem conveys dangerous chemicals in the gas cylinder into the fixed cabin through the pressure gauge and the pressurizing valve.
Optionally, the DIC strain measurement subsystem comprises two light sources, two high-speed cameras and a computer;
the shooting parameters of the high-speed camera adopt 1280×1024@13600fps, the strain measurement precision reaches 50 mu epsilon, the computer clearly restores the three-dimensional image of the component, the surface of the component is subjected to high temperature or impact force to influence and change in the lower explosion process, and the DIC strain measurement subsystem records the image data of the whole explosion process.
Optionally, the test system further comprises a firewall, a fireproof door and a patch type temperature sensor attached to the surface of the component, wherein the firewall, the fireproof door and the patch type temperature sensor are arranged in the model tunnel subsystem, and the change of the component in explosion is monitored.
The method for testing the anti-explosion and high-temperature resistance of the key structure in the highway tunnel based on the testing system comprises the following steps:
s1: an operator enters the room through a fireproof door of the movable cabin, clamps and fixes the member, moves the explosion room to a set position along the sliding track and fixes the explosion room, and then closes the fireproof door;
s2: opening a valve of a gas cylinder according to an experimental design, pumping a certain amount of combustible gas into the explosion chamber through the gas transmission pipeline, closing the valve after ventilation is finished, and dismantling a gas supply subsystem;
s3: the operator moves back to the safe area, and generates electric sparks by remotely controlling the ignition device to detonate the combustible gas in the explosion chamber, and simultaneously opens the DIC strain measurement subsystem to start recording experimental images;
s4: the computer collects information transmitted back by the pressure test spring, the patch type temperature sensor and the high-speed camera in the explosion process, three-dimensional images of the components are drawn through the computer, and the transmitted data are combined for processing and analysis.
The utility model has the beneficial effects that: the utility model designs a movable explosion source and a horseshoe-shaped model tunnel, and obtains the three-dimensional shape of the component through the DIC strain measurement system, so that the tiny change of the surface of the component can be clearly observed when the explosion happens, and the specific situation of the explosion in the highway tunnel is fully considered. The utility model provides an anti-explosion high-temperature-resistant testing system and method for key structures in a highway tunnel, which can be used for researching the influence on some key structures when flammable gas in the tunnel explodes in a laboratory by using a small-scale model test, so as to detect the anti-explosion high-temperature-resistant performance of the key structures in the tunnel. The testing system adopts a non-contact optical measurement technology to obtain a real-time image of explosion, and adopts a multi-field space-time distribution information and strain and damage numerical simulation technology of a model tunnel structure when the flammable gas explodes, so that the aim of research can be ensured and the key scientific problem can be solved.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a system for testing the anti-explosion and high-temperature resistance of a critical structure in a highway tunnel according to an embodiment of the present utility model;
FIG. 2 is a front view of a model tunnel subsystem in accordance with an embodiment of the present utility model;
FIG. 3 is a schematic view of the surface of a component according to an embodiment of the present utility model.
Reference numerals: 10-model tunnel subsystem; 101-a stationary cabin; 102-an activity cabin; 1011—a pressure relief valve; 1012-a gas transmission pipeline; 1013-a tightening ring; 1014-supporting piers; 1015-a flow meter; 1021-telescoping tube; 1022-explosion chamber; 1023-jack; 1024-pressure test spring; 1025-a supporting frame; 1026-nut; 1027-a sliding track; 1028-members; 1029-sliding sleeve holes; 20-an air supply subsystem; 201-gas cylinder; 202-a pressure gauge; 203-a pressurization valve; 204-hooping ring; a 30-DIC strain measurement subsystem; 301-a calculator; 302-a high speed camera; 303-a light source; 401-a firewall; 402-fire door; 403-ignition device; 404-patch type temperature sensor.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 3, the system and the method for testing the anti-explosion and high temperature resistance of the key structure in the highway tunnel can fill the gap in the field of detecting the performance of the key structure of the highway tunnel under the explosion condition, further improve the stability of the key structure in the tunnel, increase the safety of the highway tunnel and reduce the risk caused by accidents.
The system for testing the explosion-proof and high-temperature-resistant performance of the key structure in the highway tunnel comprises a model tunnel subsystem, an air supply subsystem, a DIC strain measurement subsystem and other components; the model tunnel subsystem adopts a horseshoe arch design composed of glass ceramics with the temperature resistance of up to 1000 ℃, so that the situation that the explosion in the model tunnel affects a key structure is convenient to observe, and meanwhile, the shape of the tunnel arch is maximally approximate to keep the true reliability of the model; the gas supply subsystem pumps the combustible gas into the explosion chamber according to the set concentration and quantity; the DIC strain measurement subsystem adopts a non-contact optical measurement method to accurately measure the space three-dimensional coordinates of an object to obtain a three-dimensional graph of a tunnel key structure, analyzes displacement and strain data of the tunnel key structure under the action of explosion impact, analyzes the change rule of crack width, and can record images in a tunnel during explosion.
Preferably, the model tunnel subsystem comprises a fixed cabin and a movable cabin, the middle of the model tunnel subsystem is separated by a firewall, the influence of explosion on a gas pipeline and an instrument in a tunnel is reduced, and the cost of repeated experiments can be reduced.
Preferably, the fixed cabin comprises a gas pipeline, a supporting pier, a tightening ring and a flowmeter, and is connected with the gas supply subsystem and the movable cabin to control the amount of combustible gas entering the movable cabin so as to control the explosion degree.
Preferably, the movable cabin comprises a telescopic pipe, an explosion chamber, a jack, a pressure test spring, a support frame, a nut, a sliding rail, a component and a sliding sleeve hole, wherein the explosion chamber is pulled by the sliding sleeve hole and the rail to control the distance between the explosion chamber and the component, and the component is fixed in the movable cabin by the support frame and the jack. The pressure testing spring is arranged between the component and the supporting frame to measure the impact force of explosion on the component, the surface of the component is stuck with the patch type temperature sensor to monitor the temperature change of the surface of the component in the explosion process, and the influence of the temperature change on the strength of the component is analyzed.
Preferably, the gas supply subsystem consists of a gas cylinder, a pressure gauge, a pressurizing valve and a tightening ring, wherein the gas cylinder can store combustible gas and dangerous chemicals such as nitro, azo, peroxy and the like, and the dangerous chemicals are dangerous chemicals which can possibly have explosion possibility in road tunnel transportation. The gas supply subsystem conveys dangerous chemicals in the gas cylinder into the fixed cabin through the pressure gauge and the pressurizing valve.
Preferably, the DIC strain measurement subsystem comprises two light sources, two high-speed cameras and a computer, the high-speed cameras adopt high-resolution and high-frame-rate cameras, shooting parameters adopt 1280×1024@13600fps, the strain measurement precision can reach 50 mu epsilon, the computer can clearly restore a three-dimensional image of a component, the surface of the component is influenced by high temperature or impact force to change in the lower explosion process, and meanwhile, the DIC strain measurement subsystem can record image data of the whole explosion process at the same time.
Preferably, the other components used in the anti-explosion high temperature resistance test system of the key structure in the highway tunnel comprise a firewall and a fireproof door in the model tunnel subsystem and a patch type temperature sensor attached to the surface of the components, and the subtle changes of the components in explosion are monitored as much as possible under the condition of ensuring the verification and safety.
The embodiment of the utility model also provides a method for testing the explosion-proof and high-temperature-resistant properties of the key structure in the highway tunnel, which comprises the following steps: the operating personnel enter the room through the fireproof door of the movable cabin, the component is clamped and fixed, the explosion room is moved to a preset position and fixed, then the fireproof door is closed, the valve of the gas cylinder is opened according to the experimental design, a certain amount of combustible gas is pumped into the explosion room through the gas transmission pipeline, the valve is closed, the gas supply subsystem is removed, the operating personnel moves back to a safe area, an electric spark is generated through the ignition device by remote control, the combustible gas in the explosion room is detonated, and meanwhile, the DIC strain measurement subsystem is opened to record experimental images. After the experiment is finished, the computer stores the surface temperature parameters of the component obtained by the patch type temperature sensor and the pressure parameters obtained by the pressure test spring in the explosion process, and the surface temperature parameters and the pressure parameters are processed and analyzed by combining the images and the information recorded and recorded by the DIC strain measurement subsystem.
The embodiment of the utility model provides an anti-explosion high temperature resistance test system and a method for a key structure in a highway tunnel, wherein a model tunnel consists of microcrystalline glass and is internally divided into a fixed cabin and a movable cabin, and the cabins are separated by a firewall and a fireproof door; a gas pipeline is arranged in the fixed cabin, an explosion chamber and a member to be tested are arranged in the movable cabin, the distance between the explosion chamber and the member to be tested can be controlled in a front-back movable way, the to-be-tested component is fixed in the movable cabin by the jack and the supporting frame, a patch type temperature sensor is attached to the surface of the to-be-tested component, a pressure test spring is arranged on the surface of the to-be-tested component, and temperature and pressure parameters of the surface of the component during explosion are collected; the gas supply subsystem pumps the combustible gas into the explosion chamber; the ignition device remotely detonates the combustible gas in the explosion chamber; the DIC strain measurement subsystem acquires images of the components during explosion to construct a three-dimensional graph, and changes of the strength and the structure of the components during explosion are observed. The method is used for measuring and analyzing the deformation characteristics and the damage process (pressure and displacement) of the key structure of the highway tunnel in the explosion process, providing experimental basis for analyzing the influence factors and damage causes of the key structure of the highway tunnel under the explosion impact load, and having great significance for evaluating the explosion resistance and high temperature resistance of the key structure in the highway tunnel.
The embodiment of the utility model provides an antiknock high temperature resistance test system and a method for a key structure in a highway tunnel, wherein a model tunnel consists of microcrystalline glass and is internally divided into a fixed cabin and a movable cabin; the fixed cabin is internally provided with a gas pipeline, the movable cabin is internally provided with an explosion chamber and a member to be tested, and the member to be tested is stuck with a patch type temperature sensor and is provided with a pressure test spring; the gas supply subsystem pumps the combustible gas into the explosion chamber; the ignition device remotely detonates the gas in the explosion chamber; the DIC strain measurement subsystem acquires images of the component at the time of explosion to construct a three-dimensional pattern. And the key structure deformation characteristics and the damage process (pressure and displacement) of the highway tunnel in the explosion process are measured and analyzed, so that experimental basis is provided for the analysis of the influence factors and damage causes of the key structure of the highway tunnel under the explosion impact load. Fills the gap in the field of detecting the performance of the key structure of the highway tunnel under the explosion condition, thereby improving the stability of the key structure in the tunnel and increasing the safety of the highway tunnel.
The following will describe specific implementation of the system and method for testing the anti-explosion and high-temperature resistance of a key structure in a highway tunnel according to the embodiments of the present utility model with reference to fig. 1 to 3.
The model tunnel subsystem 10 is made of glass ceramic and has a horseshoe-shaped structure, the interior of the model tunnel subsystem is divided into a fixed cabin 101 and a movable cabin 102, the fixed cabin and the movable cabin are separated by a fire wall 401, and the explosion in the movable cabin 102 does not affect the pipeline in the fixed cabin 101, so that multiple tests can be carried out only by replacing a member 1028 in the movable cabin 102.
The pressure release valve 1011 for ensuring cabin safety and the gas pipeline 1012 connected with the gas supply subsystem 20 are arranged in the fixed cabin 101, the gas pipeline 1012 is kept stable by the tightening ring 1013 and the supporting pier 1014, and the gas pipeline 1012 is provided with a flow meter 1015 for monitoring the amount of gas input into the explosion chamber 1022 and controlling the explosion intensity generated by the test.
The movable chamber 102 is provided with a telescopic tube 1021 connected with the explosion chamber 1022, and combustible gas enters the explosion chamber 1022 along the telescopic tube 1021 from the gas pipeline 1012 in the fixed chamber 101. Explosion chamber 1022 is movable along a sliding track 1027 and sliding sleeve 1029 secured to the movable housing 102 by a nut 1026. An ignition device 403 is housed within explosion chamber 1022 for remote detonation. The member 1028 is clamped in the movable cabin 102 by a jack 1023 and a supporting frame 1025, a pressure test spring 1024 on the back of the member 1028 is used for measuring the pressure generated by the explosion shock wave to the member 1028, and a patch type temperature sensor 404 is attached to the surface of the member 1028 for monitoring the temperature change in the explosion process. The movable compartment 102 is isolated from the outside by a fire door 402.
The gas supply subsystem 20 supplies the required combustible gas to the explosion chamber 1022, and the gas supply subsystem 20 is composed of a gas cylinder 201, a pressure gauge 202 and a pressurizing valve 203, and a tightening ring 204 is used for tightening the interface with the gas pipeline 1012 to prevent the combustible gas from leaking into the environment to cause pollution.
The DIC strain measurement subsystem comprises a computer 301, a high-speed camera 302 and a light source 303, wherein the shooting parameters of the high-speed camera 302 are 1280×1024@13600fps, the strain measurement precision can reach 50 mu epsilon, a three-dimensional image of a member 1028 can be clearly constructed, the propagation condition of cracks on the surface of the member 1028 in the lower explosion process is shot, and the whole process image data of the explosion is recorded for research and analysis.
The method for testing the explosion-proof and high-temperature-resistant performance of the key structure in the highway tunnel is realized by using the system for testing the explosion-proof and high-temperature-resistant performance of the key structure in the highway tunnel, and comprises the following steps:
step S1, an operator enters the room through the fireproof door 402 of the movable cabin 102, clamps and fixes the member 1028, moves the explosion room 1022 to a set position along the sliding track 1027 and fixes the explosion room, and then closes the fireproof door 402;
step S2, opening a valve of the gas cylinder 201 according to an experimental design, pumping a certain amount of combustible gas into the explosion chamber 1022 through the gas transmission pipeline 1012, closing the valve after ventilation is finished, and dismantling the gas supply subsystem 20;
step S3, the operator moves back to the safe area, and remotely controls the ignition device 403 to generate an electric spark, detonates the combustible gas in the explosion chamber 1022, and simultaneously opens the DIC strain measurement subsystem 30 to start recording experimental images;
in step S4, the computer 301 collects the information transmitted back by the pressure test spring 1024, the patch type temperature sensor 404 and the high-speed camera 302 during the explosion process, and draws the three-dimensional image of the member 1028 through the computer 301, and processes and analyzes the data in combination with the transmitted data.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.
Claims (1)
1. Be used for key structure antiknock high temperature resistance test system in highway tunnel, its characterized in that: the system comprises a model tunnel subsystem, an air supply subsystem and a DIC strain measurement subsystem of a digital image correlation method;
the model tunnel subsystem is a horseshoe arc, and is made of microcrystalline glass with a melting point of 1000 ℃;
the gas supply subsystem pumps the combustible gas into the explosion chamber according to the set concentration and quantity;
the DIC strain measurement subsystem adopts a non-contact optical measurement method to measure the spatial three-dimensional coordinates of an object to obtain a three-dimensional graph of a tunnel key structure, analyzes the change rule of crack width under the action of explosion impact and records images in the tunnel;
the model tunnel subsystem comprises a fixed cabin and a movable cabin, and the middle of the model tunnel subsystem is separated by a firewall;
the fixed cabin comprises a gas pipeline, a supporting pier, a hooping ring and a flowmeter;
the fixed cabin is connected with the gas supply subsystem and the movable cabin, and the amount of combustible gas entering the movable cabin is controlled;
the movable cabin comprises a telescopic pipe, an explosion chamber, a jack, a pressure test spring, a support frame, a nut, a sliding track, a member and a sliding sleeve hole;
the distance from the explosion chamber to the component is controlled by the sliding sleeve hole and the track traction;
the component is fixed in the movable cabin by a supporting frame and a jack;
a pressure test spring is arranged between the component and the supporting frame to measure the impact force of explosion on the component;
a patch type temperature sensor is attached to the surface of the component to monitor the temperature change of the surface of the component in the explosion process, and the influence of the temperature change on the strength of the component is analyzed;
the air supply subsystem comprises an air bottle, a pressure gauge, a pressurizing valve and a tightening ring;
the gas cylinder can store dangerous chemicals such as nitro, azo and peroxy;
the gas supply subsystem conveys dangerous chemicals in the gas cylinder into the fixed cabin through the pressure gauge and the pressurizing valve;
the DIC strain measurement subsystem comprises two light sources, two high-speed cameras and a computer;
the shooting parameters of the high-speed camera adopt 1280×1024@13600fps, the strain measurement precision reaches 50 mu epsilon, the computer clearly restores the three-dimensional image of the component, and the surface of the component is subjected to high temperature or impact force to change in the lower explosion process, and the DIC strain measurement subsystem records the image data of the whole explosion process;
the test system also comprises a firewall, a fireproof door and a patch type temperature sensor, wherein the firewall and the fireproof door are arranged in the model tunnel subsystem, and the patch type temperature sensor is attached to the surface of the component and is used for monitoring the change of the component in explosion;
the test method based on the test system comprises the following steps:
s1: an operator enters the room through the fireproof door of the movable cabin, clamps and fixes the member to be tested, moves the explosion room to a set initial position along a sliding track and fixes the explosion room, and then closes the fireproof door;
s2: opening a valve of the gas cylinder according to an experimental design, configuring the required combustible gas in the fixed cabin through the gas pipeline, closing the valve after the configuration is completed, and dismantling the gas cylinder;
s3: the operator moves back to the safety area, and the fixed cabin pumps the configured combustible gas into the explosion chamber;
s4: the computer collects information transmitted back by the pressure test spring, the patch type temperature sensor and the high-speed camera in the explosion process, three-dimensional images of the components are drawn through the computer, and the information is processed and analyzed by combining the transmitted data.
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| CN117630324B (en) * | 2024-01-15 | 2024-04-19 | 成都渝能能源设备有限公司 | Device and method for testing anti-explosion performance of anti-explosion material based on hydrogen explosion |
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