CN108535314A - A kind of cold area's Railway Tunnel air curtain experimental rig and test method - Google Patents
A kind of cold area's Railway Tunnel air curtain experimental rig and test method Download PDFInfo
- Publication number
- CN108535314A CN108535314A CN201810171427.6A CN201810171427A CN108535314A CN 108535314 A CN108535314 A CN 108535314A CN 201810171427 A CN201810171427 A CN 201810171427A CN 108535314 A CN108535314 A CN 108535314A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- air curtain
- temperature
- country rock
- cold area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The present invention relates to a kind of cold area's Railway Tunnel air curtain experimental rigs, the tunnel formed including country rock, air curtain for obstructing the flowing of Tunnel inner air and outer air and the country rock ground temperature control device for controlling the tunnel ground temperature, the country rock is placed in cool room, the country rock temperature control device include water holding space and water pump, the water holding space is set to the tunnel periphery, water temperature by controlling the water holding space controls the tunnel ground temperature, the tunnel ambient temperature is controlled by controlling the refrigeration compartment temperature, temperature test point is equipped in the country rock, wind speed test point is equipped in the Tunnel.The present invention is solves the problems, such as that tunnel in cold area freeze injury provides test data and theories integration.
Description
Technical field
The present invention relates to a kind of experimental rig more particularly to a kind of cold area's Railway Tunnel air curtain experimental rig and examinations
Proved recipe method.
Background technology
It is continuously increased in the tunnel quantity that High aititude, high latitude area are built, the freeze injury problem of tunnel in cold area becomes increasingly conspicuous.
It is shown according to the freeze injury statistics of Japan, Norway and China, freeze injury occurs for Japan's 3 819 railway tunnel in (1999) all fronts
Tunnel have 2 135, account for tunnel sum 56%, the event that winter jeopardizes traffic safety because of freeze injury occurs repeatedly；Norway
All there are different degrees of Lining cracks, hangs ice and the freeze injuries such as ice slips in (nineteen ninety) domestic almost all of railway tunnel；In
Completely 11 516 railway tunnel, the tunnel that freeze injury occurs have 5 990 for state (2014), the 52% of tunnel sum are accounted for, wherein 2
937 generation serious cold damages, account for the 26% of tunnel sum.
Largely cold area's Concerning Railway Tunnel Construction and traffic-operating period show that freeze injury caused by low temperature is prevalent in existing railway tunnel
In road, these freeze injuries both did great damage to tunnel structure, while also burying major safety risks safely to railway operation.Paving
If insulating layer is the current domestic passive cold-proof heat insulation measure generally used, being laid with insulating layer has certain accommodation, and
All tunnel in cold area are not suitable for it, research novel energy-conserving active Insulation becomes the development of the following tunnel in cold area heat insulation work
Direction.
Air curtain theory is very ripe, and be widely used in supermarket, hospital, station, industrial premises gate, mine and
In mine, at present in built tunnel in cold area heat insulation work, the precedent using air curtain heat preserving method, heat insulation effect class there is no
It is similar to winter protection door, using the high wind of vertical direction, the heat exchange between inside and the external world at tunnel portal is reduced, is protected to reach
Hold the purpose of temperature in hole.For air curtain heat preserving method compared with winter protection door, great advantage is not influence traffic safety, management letter
Single, maintenance is convenient.
Turbulivity α is related with jet geometry size, cannot be acquired with calculation formula, and different tests model turbulivity is not
It is identical, it is necessary to be acquired by repeatedly accurate experiment.The experiment of existing air curtain correlation model is about freezer gate, mining mostly
In terms of tunnel, it is not particularly suited for cold area's Railway Tunnel, builds rational experimental rig and test method, it is high to disclose the area that trembles with fear
Iron tunnel air curtain keeps the temperature mechanism, to solve the problems, such as that tunnel in cold area freeze injury provides test data and theories integration.
Invention content
The present invention provides to solve the problems, such as to lack in the prior art corresponding experimental rig to solve tunnel in cold area freeze injury
Test data and theories integration, provide a kind of cold area's Railway Tunnel air curtain experimental rig, which is made by being arranged
Cold house and country rock ground temperature control device, simulate the ambient temperature and tunnel ground temperature of Railway Tunnel, pass through control and become quantity research
Relationship between each parameter pair and air curtain barriering efficiency and mixing temperature.
The technical solution used in the present invention is：A kind of cold area's Railway Tunnel air curtain experimental rig, including country rock
The tunnel 10 of formation, the air curtain for obstructing 10 hole inner air and outer air flowing of tunnel and the country rock for controlling the tunnel ground temperature
Ground temperature control device, the country rock are placed in cool room, the country rock temperature control device include water holding space and water pump, it is described
Water holding space is set to 10 periphery of the tunnel, and the water temperature by controlling the water holding space controls the tunnel ground temperature, passes through
It controls the refrigeration compartment temperature and controls 10 ambient temperature of tunnel, temperature test point, the tunnel 10 are equipped in the country rock
Wind speed test point is equipped in hole.
Further, the temperature test point is set at the vault in the tunnel 10, left and right haunch and left and right foundation
Inside country rock.
Further, the temperature test point is uniformly distributed along 10 axial direction of the tunnel.
Further, the country rock is mixed by sand, barite, vaseline and gypsum.
Further, the notch setting of the air curtain is in 10 mouthfuls of tunnel, 10 mouthfuls of the tunnel installation far from the air curtain
It is air-draft-type jet blower to have jet blower, the jet blower.
Further, photographic device and lighting device are installed, the photographic device is tried for recording in the cool room
Test progress.
The present invention also provides a kind of test methods based on cold area's Railway Tunnel air curtain experimental rig, including with
Lower step：
(1) by with adjusting cool room and country rock temperature control device, 10 outside air temperature of tunnel and tunnel ground temperature are fixed,
(2) control variate method, each parameter of fixed air curtain is used to change the width of jet of test air curtain, research institute
State the relationship between width of jet and air curtain barriering efficiency；
(3) relationship between other parameters and air curtain barriering efficiency is studied successively according to step (2).
Further, each parameter include the spout angle of air curtain, jet temperature, effluxvelocity, setting interval and
Length is set, and the spacing distance being divided between the setting between curtain duct spout, the setting length refers to air curtain pipe
The total length that road spout is arranged in tunnel.
Further, further include step (4) Fitting Analysis test data clearly 10 air curtain of cold area's Railway Tunnel
Turbulivity α, air barrier efficiency eta and mixing air temperature T1Test value.
Advantageous effect caused by the present invention includes：
(1) achievement in research of the pilot system can clearly tremble with fear the insulating efficiency and turbulivity of area's high ferro tunnel air curtain
α, air barrier efficiency eta and mixing air temperature T1Test value, and carry out major parameter between influence relationship research, will
Help to solve the problems, such as tunnel in cold area freeze injury.
(2) being laid with insulating layer has certain accommodation, is not particularly suited for all tunnel in cold area, studies novel energy-conserving
Active Insulation becomes the developing direction of the following tunnel in cold area heat insulation work, this experimental rig and test method are protected for air curtain
Warm theoretical popularization provides test data and supports.
Description of the drawings
Fig. 1 is that the experimental rig of cold area's Railway Tunnel of the present invention designs stereogram；
Fig. 2 is the experimental rig floor plan design of cold area's Railway Tunnel of the present invention；
The test method of the areas Tu3Wei Han Railway Tunnel.
In figure：1- air curtains control device, 2, pipeline, 3- headlamps, 4- photographic devices, 5- country rocks temperature control device,
6- jet blowers, 7- temperature tests point, 8- wind speed test point, 9- cool rooms, the tunnels 10-.
Specific implementation mode
Further details of explanation is done to the present invention with reference to the accompanying drawings and detailed description, it should be appreciated that
Protection scope of the present invention is not restricted by specific implementation.
As shown in Figs. 1-2, a kind of cold area's Railway Tunnel air curtain experimental rig includes air curtain, headlamp 2, takes the photograph
As device 3, country rock ground temperature control device 4, jet blower 5, temperature test point 6, wind speed test point 7, cool room 8, tunnel 9 etc.
Composition.Ecto-entad is formed in temperature control device and tunnel, tunnel with being followed successively by cool room, country rock by country rock, true in order to simulate
In the case of tunnel ground temperature, country rock temperature control device include water holding space and water pump, water holding space is arranged in the periphery of country rock,
Simulate tunnel ground temperature by controlling water temperature, tunnel and country rock temperature control device be placed in cool room, cool room simulates true feelings
Outside air temperature under condition.
The air curtain control device 1 of air curtain is located at right over cool room one end, and the spout of air curtain is connected by pipeline,
Spout is installed on tunnel face, and spout sprays air flowing in warm-air curtain barrier Tunnel, maintains temperature in hole, connection signal
As shown in Figure 1, the schematic diagram of its air curtain jet-stream wind is as shown in Figure 3.
Headlamp 2 is located at right over cool room, provides illumination functions.Photographic device 3 is located at cool room diagonal angle, provides record
As function, convenient for understanding experiment progress in time.Country rock temperature control device 4 be located in cool room, the periphery of country rock, connection show
As shown in Fig. 2, the device provides water pressure by water pump, guarantee water constantly follows badly to maintain water temperature meaning, and then controls country rock temperature
Degree is tunnel ground temperature.Jet blower 5 is located at the other end in tunnel, using air-draft-type jet blower.
Temperature test point 6 is located in country rock, and for testing rock stratum internal temperature, temperature test point is located at tunnel vault, a left side
Right haunch and left and right foundation etc. are arranged a temperature test point every 1 meter along tunnel axial direction, test temperature point in country rock
Cloth.
One wind speed test point 7 is set at interval of 1m inwards from tunnel portal, wind speed test point 7 is located at tunnel or so foundation
Locate, wind speed profile in testing tunnel.
The length in tunnel is respectively 6m, 2m, 2m, formed tunnel country rock and lining material by sand, barite, all
Intellectual circle and gypsum mix according to a certain ratio.
For air curtain 1 using the air-draft-type that can be heated, the adjustable range of wind speed is 1m/s~30m/s.Photographic device 3 can be with
Monitor the progress of experiment in real time.The temperature range that country rock ground temperature controls control device is 0 DEG C~15 DEG C.Jet blower 5 is using pumping
The adjustable range of wind formula jet blower, wind speed is 1m/s~30m/s.Temperature test point 6 include from tunnel portal inwards at interval of
1m is laid in tunnel vault, left and right haunch and left and right foundation etc., and 5 measuring points of often place's setting, this 5 measuring points are along tunnel axial direction
Arrangement tests country rock longitudinally and radially Temperature Distribution.The temperature regulating range of cool room 8 is 0 DEG C~-30 DEG C.
According to cold area's Railway Tunnel air curtain experimental rig and its test method Fig. 3：8 He of cool room is adjusted first
Country rock ground temperature control device 4, fixed world temperature and country rock ground temperature, using control variate method, the spout for adjusting air curtain 1 is wide
Degree, spout angle, jet temperature, effluxvelocity, setting interval and setting length, using temperature test point 6 and wind speed test point 7
When acquisition opens and closes air curtain 1 respectively, wind speed in the temperature and Tunnel of country rock.Then, change outside air temperature and country rock
Ground temperature repeats above-mentioned experiment process, until completing to test.
Summarize test data, the turbulent flow for the area's Railway Tunnel air curtain that can clearly tremble with fear by Fitting Analysis test data
Factor alpha, air barrier efficiency eta and mixing air temperature T1Test value, and research air curtain width of jet, spout angle,
The pass between parameters and air curtain barriering efficiency and mixing temperature such as jet temperature, effluxvelocity, setting interval and setting length
System.
The preferred embodiment of the present invention is above are only, the present invention is not limited in the content of embodiment.For in this field
Technical staff for, can have various change and change within the scope of technical scheme of the present invention, made by it is any variation and
Change, within the scope of the present invention.
Claims (9)
1. a kind of cold area's Railway Tunnel air curtain experimental rig, it is characterised in that：Including country rock formed tunnel, for hindering
Every the air curtain of Tunnel inner air and outer air flowing and country rock ground temperature control device for controlling the tunnel ground temperature, the country rock
Be placed in cool room, the country rock temperature control device include water holding space and water pump, the water holding space is set to the tunnel
Road periphery, the water temperature by controlling the water holding space control the tunnel ground temperature, are controlled by controlling the refrigeration compartment temperature
The tunnel ambient temperature, the country rock is interior to be equipped with temperature test point, and wind speed test point is equipped in the Tunnel.
2. cold area's Railway Tunnel air curtain experimental rig according to claim 1, it is characterised in that：The temperature is surveyed
Pilot is set to inside the country rock at the vault in the tunnel, left and right haunch and left and right foundation.
3. cold area's Railway Tunnel air curtain experimental rig according to claim 2, it is characterised in that：The temperature is surveyed
Pilot is uniformly distributed along the tunnel axial direction.
4. cold area's Railway Tunnel air curtain experimental rig according to claim 1, it is characterised in that：The country rock by
Sand, barite, vaseline and gypsum mix.
5. cold area's Railway Tunnel air curtain experimental rig according to claim 1, it is characterised in that：The air curtain
Notch setting in tunnel face, the tunnel face far from the air curtain is equipped with jet blower, and the jet blower is air-draft-type
Jet blower.
6. cold area's Railway Tunnel air curtain experimental rig according to claim 1, it is characterised in that：The cool room
Photographic device and lighting device are inside installed, the photographic device is for recording experiment progress.
7. a kind of test method based on cold area's Railway Tunnel air curtain experimental rig described in claim 1, feature
It is, includes the following steps：
(1) by with adjusting cool room and country rock temperature control device, tunnel outside air temperature and tunnel ground temperature are fixed,
(2) control variate method, each parameter of fixed air curtain is used to change the width of jet of test air curtain, study the spray
Relationship between mouth width degree and air curtain barriering efficiency；
(3) relationship between other parameters and air curtain barriering efficiency is studied successively according to step (2).
8. the test method of cold area's Railway Tunnel air curtain experimental rig according to claim 7, it is characterised in that：
Each parameter includes spout angle, jet temperature, effluxvelocity, setting interval and the setting length of air curtain, the setting
Between be divided into spacing distance between curtain duct spout, the setting length refers to that curtain duct spout is arranged in tunnel
Total length.
9. the test method of cold area's Railway Tunnel air curtain experimental rig according to claim 7, it is characterised in that：
Further include turbulivity α, the air barrier effect of the clearly cold area's Railway Tunnel air curtain of step (4) Fitting Analysis test data
Rate η and mixing air temperature T1Test value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810171427.6A CN108535314B (en) | 2018-03-01 | 2018-03-01 | Cold region high-speed railway tunnel air curtain test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810171427.6A CN108535314B (en) | 2018-03-01 | 2018-03-01 | Cold region high-speed railway tunnel air curtain test device and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108535314A true CN108535314A (en) | 2018-09-14 |
| CN108535314B CN108535314B (en) | 2021-05-11 |
Family
ID=63485899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810171427.6A Active CN108535314B (en) | 2018-03-01 | 2018-03-01 | Cold region high-speed railway tunnel air curtain test device and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108535314B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448536A (en) * | 2018-10-18 | 2019-03-08 | 中铁西南科学研究院有限公司 | A kind of aeration type tunnel in cold area longitudinal temperature distribution experiments device |
| CN110130983A (en) * | 2019-04-09 | 2019-08-16 | 淮阴工学院 | A kind of novel tunnel in cold area hole front end heat-insulation system device and its control method |
| CN111878149A (en) * | 2020-06-29 | 2020-11-03 | 西安建筑科技大学 | Self-air curtain system for reducing air invasion amount of circular tunnel |
| CN112461488A (en) * | 2020-11-09 | 2021-03-09 | 中铁二十局集团有限公司 | Tunnel high-pressure air curtain test device, method and system |
| CN113586120A (en) * | 2021-08-31 | 2021-11-02 | 淮阴工学院 | Combined hot air jet heat preservation device for cold region tunnel and control method |
| CN114235633A (en) * | 2021-11-30 | 2022-03-25 | 淮阴工学院 | Model test method for measuring tunnel air curtain running track and performance thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102526909A (en) * | 2012-02-16 | 2012-07-04 | 中国人民解放军海军工程大学 | Long-channel air vortex plug smoke isolation system |
| CN205317708U (en) * | 2016-01-29 | 2016-06-15 | 西南交通大学 | Test device of han qu tunnel country rock and distinguished and admirable heat transfer |
| CN106353114A (en) * | 2016-08-24 | 2017-01-25 | 石家庄铁道大学 | Experiment device for tesing temperature field of tunnels in cold areas and experiment method thereof |
| CN106401644A (en) * | 2016-10-27 | 2017-02-15 | 石家庄铁道大学 | Air curtain heat preservation heating system for tunnels in cold region |
| CN106485975A (en) * | 2016-11-15 | 2017-03-08 | 西南交通大学 | A kind of tunnel in cold area temperature field laboratory experiment system |
| CN206161574U (en) * | 2016-11-21 | 2017-05-10 | 西南交通大学 | Test device of high ground temperature tunnel country rock and distinguished and admirable heat transfer |
-
2018
- 2018-03-01 CN CN201810171427.6A patent/CN108535314B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102526909A (en) * | 2012-02-16 | 2012-07-04 | 中国人民解放军海军工程大学 | Long-channel air vortex plug smoke isolation system |
| CN205317708U (en) * | 2016-01-29 | 2016-06-15 | 西南交通大学 | Test device of han qu tunnel country rock and distinguished and admirable heat transfer |
| CN106353114A (en) * | 2016-08-24 | 2017-01-25 | 石家庄铁道大学 | Experiment device for tesing temperature field of tunnels in cold areas and experiment method thereof |
| CN106401644A (en) * | 2016-10-27 | 2017-02-15 | 石家庄铁道大学 | Air curtain heat preservation heating system for tunnels in cold region |
| CN106485975A (en) * | 2016-11-15 | 2017-03-08 | 西南交通大学 | A kind of tunnel in cold area temperature field laboratory experiment system |
| CN206161574U (en) * | 2016-11-21 | 2017-05-10 | 西南交通大学 | Test device of high ground temperature tunnel country rock and distinguished and admirable heat transfer |
Non-Patent Citations (2)
| Title |
|---|
| 梁晶晶: "射流空气幕气流特性及其隔断效应研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 谢晶等: "冷库空气幕性能数值模拟与参数优化", 《农业机械学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448536A (en) * | 2018-10-18 | 2019-03-08 | 中铁西南科学研究院有限公司 | A kind of aeration type tunnel in cold area longitudinal temperature distribution experiments device |
| CN110130983A (en) * | 2019-04-09 | 2019-08-16 | 淮阴工学院 | A kind of novel tunnel in cold area hole front end heat-insulation system device and its control method |
| CN110130983B (en) * | 2019-04-09 | 2021-02-02 | 淮阴工学院 | Novel cold region tunnel portal front-end heat preservation system device and control method thereof |
| CN111878149A (en) * | 2020-06-29 | 2020-11-03 | 西安建筑科技大学 | Self-air curtain system for reducing air invasion amount of circular tunnel |
| CN112461488A (en) * | 2020-11-09 | 2021-03-09 | 中铁二十局集团有限公司 | Tunnel high-pressure air curtain test device, method and system |
| CN113586120A (en) * | 2021-08-31 | 2021-11-02 | 淮阴工学院 | Combined hot air jet heat preservation device for cold region tunnel and control method |
| CN114235633A (en) * | 2021-11-30 | 2022-03-25 | 淮阴工学院 | Model test method for measuring tunnel air curtain running track and performance thereof |
| CN114235633B (en) * | 2021-11-30 | 2024-05-14 | 淮阴工学院 | Model test method for measuring tunnel air curtain running track and performance thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108535314B (en) | 2021-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108535314A (en) | A kind of cold area's Railway Tunnel air curtain experimental rig and test method | |
| Lai et al. | Freeze-proof method and test verification of a cold region tunnel employing electric heat tracing | |
| Zhou et al. | Temperature field and anti-freezing system for cold-region tunnels through rock with high geotemperatures | |
| CN103114600B (en) | Method for conducting active thermal protection on tunnel shallow buried section in permafrost region using hot bar cluster | |
| CN106706697A (en) | Model test device for simulating pre-cooling freezing method construction under flowing effect of underground water | |
| CN106485975B (en) | A kind of tunnel in cold area temperature field laboratory experiment system | |
| CN208201566U (en) | Active ground source-air-source snow melt deicing device | |
| CN105672313B (en) | One kind accelerates ventilation by forced draft cooling anchor tube and construction method | |
| CN104121031A (en) | Ventilation monitoring system and method for long-distance tunnel construction | |
| Pflitsch et al. | Air flow measurements in the underground section of a UK light rail system | |
| CN108486989A (en) | Passive geothermal snow melt deicing device and its construction technology | |
| CN203584452U (en) | Roadway heat exchanging simulation system for metal mine deep mining and tunneling | |
| CN113586120A (en) | Combined hot air jet heat preservation device for cold region tunnel and control method | |
| CN205317708U (en) | Test device of han qu tunnel country rock and distinguished and admirable heat transfer | |
| CN111594252A (en) | Method for preventing and treating spontaneous combustion of coal in goaf during exploitation of extremely spontaneous combustion coal seam | |
| Gao et al. | Evolution of temperature field in cold regional tunnel and anti-freezing system under the effect of air curtain | |
| Galkin | Thermal conditions of the underground town collector tunnel | |
| Wang et al. | Study on the performance of the new composite thermal insulation lining for the railway operational tunnel in cold regions | |
| CN108678794B (en) | Method for preheating mine inlet air by using ground temperature of goaf and waste roadway | |
| CN116227007B (en) | Cold-region tunnel cold-proof analysis method and device and cold-region tunnel heat preservation system | |
| CN111059647B (en) | Planning method for air source and ground source heat pump air conditioning system | |
| CN107313796A (en) | A kind of coal mine heat evil prevention and controls | |
| Mathews et al. | A new integrated design tool for naturally ventilated buildings part 1: ventilation model | |
| CN218669434U (en) | Combined hot air jet heat preservation device for cold region tunnel | |
| CN108104862B (en) | Deep mine driving working face cooling system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20180914 Assignee: Anhui Shengyan Construction Engineering Co.,Ltd. Assignor: HUAIYIN INSTITUTE OF TECHNOLOGY Contract record no.: X2022980025816 Denomination of invention: An Air Curtain Test Device and Test Method for High Speed Railway Tunnel in Cold Regions Granted publication date: 20210511 License type: Common License Record date: 20221212 |
|
| EE01 | Entry into force of recordation of patent licensing contract |