CN109115454A - The simulation experiment system of piping lane ventilating system safety detection - Google Patents
The simulation experiment system of piping lane ventilating system safety detection Download PDFInfo
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- CN109115454A CN109115454A CN201810815835.0A CN201810815835A CN109115454A CN 109115454 A CN109115454 A CN 109115454A CN 201810815835 A CN201810815835 A CN 201810815835A CN 109115454 A CN109115454 A CN 109115454A
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- model
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- carbon dioxide
- corridor cabin
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
- G01M9/067—Measuring arrangements specially adapted for aerodynamic testing dealing with flow visualisation
Abstract
The invention discloses a kind of piping lane cabin indoor natural ventilating and mechanical exhaust model measurement pilot system and test method, entire platform includes corridor cabin model, gas delivery system, fan monitor and the big component part of gas concentration measuring system four.Gas delivery system is connected with corridor cabin model lower end, carbon dioxide gas is passed through into corridor cabin model, fan monitor system is connected with corridor cabin model exhaust outlet, wind speed is provided for corridor cabin model and fan operation state is monitored, gas concentration measurement system protrudes into the model of corridor cabin, for acquiring the gas concentration lwevel data information in the model of corridor cabin.The test macro is simulated in piping lane after gas leakage, and respectively by the test of gas concentration and fan condition parameter in corridor in the case of gravity-flow ventilation and two kinds of mechanical exhaust, test result is intuitively credible.
Description
Technical field
The present invention relates in the safety test field of piping lane affiliated facility ventilating system, in particular to a kind of piping lane cabin from
So ventilation and mechanical exhaust model measurement pilot system and test method.
Background technique
Urban Underground pipe gallery is the important component of boom town infrastructure, is that city is depended on for existence and development
Material base.Gas leakage is the principal mode of combustion gas piping lane accident, and ventilation is then the main means for handling gas leakage, is mentioned
The reliability of high piping lane ventilating system has become the important topic of China's piping lane development.Gravity-flow ventilation and mechanical exhaust are piping lanes
Improve cabin indoor environment during operation, takes away the main method of the hazardous gas of leakage, validity and operating status tool
There is important research significance.
Evaluation at present about combustion gas piping lane ventilating system is less and main using numerical simulation mode, i.e., using calculating stream
Body dynamics software carries out numerical simulation analysis to cabin flow field.Due to the complexity of fluid, using the side of computer simulation
Formula assessment piping lane ventilating system can have many X factors, lead to the inaccuracy of assessment.Therefore, it is fired using testing stand
Tracheae corridor ventilating system simulation test can directly be monitored gas concentration in cabin and fan operation state, and as according to
It is assessed according to piping lane ventilating system effect and fan condition.
Summary of the invention
The object of the present invention is to provide a kind of safe test platform of piping lane ventilating system, which passes through mock-up pair
Gas concentration and fan operation state are monitored in corridor cabin, and test result is intuitively credible.
The present invention replaces prototype corridor cabin by the corridor cabin of scaled model, arranges air inlet and outlet air in model two sides upper surface
Mouthful, operating condition is closed using enclosed construction simulation fire resistant doorsets in lower end surface equidistant placement gas leakage access port, both ends.
In the present invention: replacing methane to test as gas leakage using carbon dioxide, before guaranteeing that test is effective
Put the safety for improving platform.
In the present invention: arranging valve, flowmeter, pressure gauge along journey in carbon dioxide access corridor cabin model, guarantee to let out
The amount of carbon dioxide of leakage is stably and controllable, and guarantee test is gone on smoothly.
In the present invention: carbon dioxide is discharged by corridor cabin model exhaust outlet is unified after test, will not cause shadow to ambient enviroment
It rings.
In the present invention: the titanium dioxide set measuring system includes that carbon dioxide tests probe and data collecting instrument, described
Test equipment is arranged in the model of corridor cabin.Titanium dioxide covers concentration and converts surveyed concentration in carbon dioxide test probe test chamber
At data information transfer to data collecting instrument.Carbon dioxide measuring system mainly solves the titanium dioxide set of different zones in mock-up cabin
Concentration determination.
In the present invention: being not provided with gas pipeline in the model of corridor cabin, gas leakage delivery pipe is directly connected to corridor cabin model bottom
Outside, gas leakage are provided by constant pressure gas tank, restore gas pipeline pressure controlled condition in combustion gas piping lane.
In the present invention: wind turbine layout carries out air draft in model exhaust outlet position by the way of mechanical draft, and blower is this
Platform provides initial wind speed source.Its air output, size, power of motor etc. are fully considered when Fan Selection, for this
For platform, it should also meet with small vibration, low noise requirement.
In the present invention: arranging piezoelectric velocity sensor and resistance strain gage on blower, run for measuring blower
Vibration Condition in the process.
In the present invention: gas concentration measurement system carbon dioxide measurement accuracy is higher than 35ppm, when blower detecting system responds
Between be lower than 30 seconds.
In the present invention: carrying out the safety evaluation of piping lane ventilating system according to test data, it is desirable that gravity-flow ventilation is compared in mechanical exhaust
Carbon dioxide overall density reduces 2 times or more in the model of corridor cabin.
Compared with prior art, the present invention has the following obvious advantages:
(1) the invention avoids can only be in the limitation that piping lane site layout project relevant device is tested, so that test is easy to
It realizes, and ensure that the accuracy of test result.
(2) present invention is reduced in practical piping lane by the way that valve, pressure gauge and flowmeter, guarantee are arranged on gas pipeline
Environment, and the operating condition of different gas pipeline pressure and different leakage bores can be restored by the adjusting of valve.
(3) present invention is innovatively monitored the operating status of blower while being monitored to indoor environment,
By the operating status of blower also as the important indicator for measuring ventilating system validity.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of piping lane model in the present invention；
Fig. 3 is the structural schematic diagram of gas leakage transportation system in the present invention；
Fig. 4 is the structural schematic diagram of fan monitor system in the present invention；
Fig. 5 is the structural schematic diagram of gas concentration measurement system in the present invention.
Specific embodiment
Piping lane ventilating system analogue test platform as shown in Figures 1 to 5, entire platform include that corridor cabin model 1, gas are defeated
Send system 2, fan monitor 3 and the big component part of gas concentration measuring system 4 four.Basis of the corridor cabin model 1 as entire platform,
Other systems are built on its basis, and gas delivery system 2 is connected with 1 lower end of corridor cabin model, to 1 internal leakage two of corridor cabin model
Carbon oxide gas, fan monitor system 3 are connected with 1 exhaust outlet of corridor cabin model, provide wind speed for corridor cabin model 1, gas concentration is surveyed
Amount system 4 protrudes into the model of corridor cabin, acquires the gas concentration lwevel data information in corridor cabin model 1.
Corridor cabin model 1 refers to according to certain reduced scale, to corridor cabin main body 101, air inlet 102, exhaust outlet 103, lets out
Leak 104 etc. carry out Scaling, and the size of model needs to meet lab space requirement.
Gas leakage transportation system 2 includes carbon dioxide tracheae 201, adjustable valve 202, flowmeter 203,204 and of pressure gauge
Gas pipeline 205.Dioxide bottle 201, adjustable valve 202, flowmeter 203 and pressure gauge 204 are contacted by gas pipeline 205
Connection.Carbon dioxide tracheae 201 provides gas leakage for test, and adjustable valve 202 is used to adjust the dioxy flowed into corridor cabin model 1
The carbon dioxide for changing carbon amounts flowmeter 203 and 204 pairs of pressure gauge inflows is monitored, and guarantees that influx is suitable, stablizes.
Fan monitor system 3 mainly solves the monitoring of state during fan operation, it includes blower 301, piezoelectric type speed
Spend sensor 302, resistance foil gauge 303 and data collecting card 304.Blower 301 is used as measurement object, piezoelectric velocity sensor
302 and stress-strain piece 303 be arranged in 301 suitable position of blower, for measure the dynamic parameter in 301 operational process of blower and will
The speed that measures, stress transmission are at data information transfer to data collecting card 304.
Gas concentration measurement system 4 mainly solves the test of different zones leakage gas concentration lwevel in model corridor cabin, it
Including carbon dioxide measuring probe 401 and data collecting instrument 402.Carbon dioxide measuring probe 401 and data collecting instrument 402 use
Integration apparatus presses suitable distance, location arrangements in corridor cabin model 1 according to simulation result, for reading carbon dioxide at any time
Concentration.
The course of work of this test platform is as follows: using carbon dioxide as test gas, realizing corridor using blower exhausting
Air flowing inside cabin.Blower is adjusted to low power analog gravity-flow ventilation operating condition first, to wind speed stable case in corridor cabin, is beaten
Carbon dioxide valve is opened, using air hose to carbon dioxide is passed through inside corridor cabin, passes through record carbon dioxide detector data
Grasp carbon dioxide leakage situation.In real time observation, record carbon dioxide detector data situation until data no longer change,
Fan operation state related data is recorded simultaneously.Continue to be passed through carbon dioxide, blower is adjusted to high-power mode, observation in real time,
Record carbon dioxide detector data situation is until data no longer change, while recording fan operation state related data.
Change leakage hole position repeats above step after completing above step, assesses piping lane ventilating operation state according to test result
And influence of the blower to environment in corridor, foundation and guidance are provided for piping lane Design of Ventilation System, foundation.
Include the following steps: that (1) is joined using thermohygrometer measurement experiment indoor environment using the test method of above-mentioned platform
Number.(2) blower low-power is opened, using resistance foil gauge and piezoelectric velocity sensor to blower carry out real-time running state into
Row detection, the parameter inscribed when will correspond to are logged into computer in real time, record measurement data.(3) it is wanted according to actual condition
The flow of regulation of carbon dioxide is asked to be passed through carbon dioxide.(4) instantaneous carbon dioxide in carbon dioxide detector survey room body is utilized
Concentration situation of change.(5) blower opens high power, is monitored in real time to gas concentration lwevel, fan operation state in corridor.
(6) carbon dioxide leakage rate is adjusted, repeats 2,3,4,5.(7) carbon dioxide leakage position is adjusted, repeats 2,3,4,5.(8) it closes
Blower, carbon dioxide valve are closed, analysis processing test data carries out safety evaluation to piping lane ventilating system.
Claims (7)
1. a kind of simulation experiment system of piping lane ventilating system safety detection, it is characterised in that: the pilot system includes corridor cabin
Model (1), gas delivery system (2), fan monitor system (3) and gas concentration measuring system (4).The gas delivery system
System (2) is connected with corridor cabin model (1) lower end, is passed through carbon dioxide gas, the fan monitor system into corridor cabin model (1)
(3) it is connected with corridor cabin model (1) exhaust outlet, provides wind speed for corridor cabin model (1), the gas concentration measurement system (4) is stretched
Enter in the model of corridor cabin, the gas concentration lwevel data information in acquisition corridor cabin model (1).
2. a kind of simulation experiment system of piping lane ventilating system safety detection according to claim 1, it is characterised in that: institute
The corridor cabin model (1) stated includes corridor cabin main body (101), air inlet (102), exhaust outlet (103) and leakage hole (104), described
Corridor cabin main body (101) is main leakage region and measured zone, and the air inlet (102) and exhaust outlet (103) are located at corridor cabin
Main body (101) both sides of the upper end, as the inlet and outlet that whole system is exchanged with the external world, the leakage hole (104) is located at corridor cabin
Main body (101) lower end surface is passed through the entrance of gas as the gas delivery system (2) to the corridor cabin model (1).
3. a kind of simulation experiment system of piping lane ventilating system safety detection according to claim 1, it is characterised in that: institute
The gas delivery system (2) stated includes carbon dioxide tracheae (201), adjustable valve (202), flowmeter (203), pressure gauge (204)
With gas pipeline (205), the dioxide bottle (201) passes through gas pipeline (205) and adjustable valve (202) one end phase
Even, for adjusting the carbon dioxide flow size for flowing into corridor cabin described in claim 1 model (1), the flowmeter (203)
One end is connected by gas pipeline (205) with adjustable valve (202) other end, for measuring the total amount of carbon dioxide, the pressure
Power table (204) one end is connected by gas pipeline (205) with flowmeter (203) other end, for measuring the pressure of carbon dioxide,
Pressure gauge (204) other end is connected by gas pipeline (205) with leakage hole as claimed in claim 2 (104), is used for
It is passed through carbon dioxide.
4. a kind of simulation experiment system of piping lane ventilating system safety detection according to claim 1, it is characterised in that: institute
The fan monitor system (3) stated includes blower (301), piezoelectric velocity sensor (302), resistance foil gauge (303) and data
Capture card (304).The blower (301) is mounted at exhaust outlet as stated in claim 2 (103), the piezoelectric type
Velocity sensor (302) and resistance foil gauge (303) are arranged in the suitable position on blower (301), for measuring blower (301)
Dynamic parameter in operational process simultaneously gives the speed measured, stress transmission to the data collecting card at data information transfer
(304)。
5. a kind of simulation experiment system of piping lane ventilating system safety detection according to claim 1, it is characterised in that: institute
The gas concentration measurement system (4) stated includes carbon dioxide measuring probe (401) and data collecting instrument (402), the dioxy
Change carbon measuring probe (401) and data collecting instrument (402) and the model of corridor cabin described in claim 1 is protruded into using integration apparatus
(1) in, the carbon dioxide measuring probe (401) tests gas concentration lwevel and the concentration that will be tested is converted into data letter
Breath is transferred to data collecting instrument (402).The data collecting instrument (402) acquires the carbon dioxide measuring probe (401) and passes
Defeated next concentration data.
6. a kind of simulation experiment system of piping lane ventilating system safety detection according to claim 1, it is characterised in that: gas
Bulk concentration measuring system (4) carbon dioxide measurement accuracy is higher than 35ppm, and fan monitor system (3) response time is lower than 30 seconds.
7. a kind of simulation experiment system of piping lane ventilating system safety detection according to claim 1, it is characterised in that: machine
Tool air draft carbon dioxide overall density interior than gravity-flow ventilation corridor cabin model (1) reduces 2 times or more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810815835.0A CN109115454A (en) | 2018-07-24 | 2018-07-24 | The simulation experiment system of piping lane ventilating system safety detection |
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| CN201810815835.0A CN109115454A (en) | 2018-07-24 | 2018-07-24 | The simulation experiment system of piping lane ventilating system safety detection |
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| CN201810815835.0A Pending CN109115454A (en) | 2018-07-24 | 2018-07-24 | The simulation experiment system of piping lane ventilating system safety detection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556805A (en) * | 2019-01-21 | 2019-04-02 | 中国矿业大学(北京) | A kind of pipe gallery gas leakage diffusion experiment device |
| CN111060343A (en) * | 2019-12-31 | 2020-04-24 | 北京交通大学 | Simulation test system for safety detection of pipe gallery ventilation system |
| CN111257022A (en) * | 2020-01-16 | 2020-06-09 | 中国人民解放军陆军工程大学 | Gas explosion simulation test device and system in underground comprehensive pipe gallery space |
| CN111308337A (en) * | 2020-03-31 | 2020-06-19 | 张铭源 | Performance evaluation method for centrifugal fan inlet guide vane regulating valve |
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| CN204984470U (en) * | 2015-09-24 | 2016-01-20 | 杭州创博科技有限公司 | Utility tunnel intelligence ventilation monitoring device |
| CN205842937U (en) * | 2016-04-20 | 2016-12-28 | 青岛市市政工程设计研究院有限责任公司 | The pipe gallery ventilating system that a kind of gravity-flow ventilation and force ventilation combine |
| CN207540759U (en) * | 2017-12-18 | 2018-06-26 | 北京市劳动保护科学研究所 | A kind of municipal underground pipeline lane Ventilation simulation experimental provision |
| CN108281078A (en) * | 2018-03-14 | 2018-07-13 | 北京建筑大学 | The simulated experiment platform of the pipe leakage diffusion of underground pipe gallery model pipe |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204984470U (en) * | 2015-09-24 | 2016-01-20 | 杭州创博科技有限公司 | Utility tunnel intelligence ventilation monitoring device |
| CN205842937U (en) * | 2016-04-20 | 2016-12-28 | 青岛市市政工程设计研究院有限责任公司 | The pipe gallery ventilating system that a kind of gravity-flow ventilation and force ventilation combine |
| CN207540759U (en) * | 2017-12-18 | 2018-06-26 | 北京市劳动保护科学研究所 | A kind of municipal underground pipeline lane Ventilation simulation experimental provision |
| CN108281078A (en) * | 2018-03-14 | 2018-07-13 | 北京建筑大学 | The simulated experiment platform of the pipe leakage diffusion of underground pipe gallery model pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556805A (en) * | 2019-01-21 | 2019-04-02 | 中国矿业大学(北京) | A kind of pipe gallery gas leakage diffusion experiment device |
| CN111060343A (en) * | 2019-12-31 | 2020-04-24 | 北京交通大学 | Simulation test system for safety detection of pipe gallery ventilation system |
| CN111257022A (en) * | 2020-01-16 | 2020-06-09 | 中国人民解放军陆军工程大学 | Gas explosion simulation test device and system in underground comprehensive pipe gallery space |
| CN111308337A (en) * | 2020-03-31 | 2020-06-19 | 张铭源 | Performance evaluation method for centrifugal fan inlet guide vane regulating valve |
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