CN209724407U - A kind of constructing tunnel prevention methane accumulation facility - Google Patents
A kind of constructing tunnel prevention methane accumulation facility Download PDFInfo
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- CN209724407U CN209724407U CN201920005278.6U CN201920005278U CN209724407U CN 209724407 U CN209724407 U CN 209724407U CN 201920005278 U CN201920005278 U CN 201920005278U CN 209724407 U CN209724407 U CN 209724407U
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- blast pipe
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- air hose
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Abstract
The utility model discloses a kind of constructing tunnels to prevent methane accumulation facility, it include trident air hose, trident air hose is made of the first blast pipe, the second blast pipe and air-exhausting duct, first blast pipe and the second blast pipe are connect with the high-pressure air hose of constructing tunnel, 1 ball valve is respectively housed on the first blast pipe and the second blast pipe, safety valve is also equipped on first blast pipe or the second blast pipe, the high-pressure air hose is laid with from tunnel face into tunnel, and head end is connect with the air compressor machine outside tunnel face.The utility model can reduce gas density in gas tunnel under special circumstances, achieve the purpose that eliminate safe hidden trouble, guarantee construction speed, save the cost, ensure safety of life and property.By live service condition, gas density in hole can be reduced in time, eliminated safe hidden trouble, and it is at low cost, convenient to use, be hardly damaged, anti-vibration and pollution capacity it is strong, achieve good economic benefit.
Description
Technical field
The utility model relates to a kind of constructing tunnels to prevent methane accumulation facility, belong to technical field of tunnel construction.
Background technique
In Guizhou Province the west of Guizhou Province to the imperial tunnel (length 1308m, high methane tunnel) of generous the 5th contract section of highway six, expensive
State province Bijie is to Yunnan Zhenxiong highway the first contract section Da Zhai tunnel (length 4000m, high methane tunnel) and Nanchuan of Chongqing
Into the work progress in two river new district highway NL4 contract section springs door tunnel (length 6470m, present low gas tunnel), because
It is all to be embedded in the structures of underground, and mostly use shallow mining method greatly for vcehicular tunnel, working face is single, in vcehicular tunnel
Gas is generally discharged by way of forced ventilation.The size of gas density is in addition to related with objective Geological Reasons in tunnel
Outside, it is critical that whether the size of blower, the size of air duct fabric and intact degree, ventilation quantity can satisfy wanting for discharge gas
It asks.In the work progress of vcehicular tunnel, several situation tunnel blowers must shut down.First is that with face
Driving, the necessary spreading of air duct fabric, once spreading air duct fabric, blower must shut down；Second is that in Highway Tunnel Construction,
When air duct fabric is replaced in air duct fabric breakage, blower must shut down；Third is that encountering failure, when repairing, replacing, blower must stop
Operating；Fourth is that lower base tunnel blow out or two lining trolleys walking when, require that blower shuts down.Once blower shuts down, whole
A tunnel will be inputted without fresh air, and gas can gather at once, cause very big security risk.
It has been investigated that gas tunnel construction key is exactly to reduce gas density in hole, the reduction of gas density is only logical
It crosses and feeds ozone at hole to dilute, once and blower shuts down no fresh air entering tunnel, tunnel watt
This will be gathered at once, leave security risk.Currently, gas tunnel mostly uses the mode of dual air blowers and dual power greatly to take turns circulation
Wind, so that guaranteeing can 24 hours air feed in tunnel.But even if using dual air blowers and dual power when constructing, blower shuts down
The case where be also inevitable.Once moreover, having gathered a large amount of gas in hole, personnel dare not at will enter tunnel,
Have to first divulge information reduce gas density after just can enter, if encounter again air duct fabric damage or blower damage, who dare not
At will enter tunnel and checks gas density situation.How gas density could be reduced, eliminated safe hidden trouble.
Summary of the invention
The purpose of the utility model is to provide a kind of constructing tunnels to prevent methane accumulation facility.The facility can be quick
Gas density is reduced, is eliminated safe hidden trouble, and structure is simple, is hardly damaged, is easy to use, is at low cost.
It include trident air hose the technical solution of the utility model includes: a kind of constructing tunnel prevents methane accumulation facility, three
Fork-shaped air hose is made of the first blast pipe, the second blast pipe and air-exhausting duct, and the first blast pipe and the second blast pipe are and tunnel
The high-pressure air hose of construction connects, and 1 ball valve, the first blast pipe or the second air inlet are respectively housed on the first blast pipe and the second blast pipe
Safety valve is also equipped on pipe, the high-pressure air hose is laid with from tunnel face into tunnel, the pneumatics outside head end and tunnel face
Machine connection.
Constructing tunnel above-mentioned prevents methane accumulation facility, the air-exhausting duct and the distinguished and admirable diffusion being mounted on tunnel vault
Device connection.
Constructing tunnel above-mentioned prevents methane accumulation facility, and the trident air hose is fixed on the tunnel surface Chu Zhi.
Constructing tunnel above-mentioned prevents methane accumulation facility, and the distinguished and admirable diffuser is shower nozzle structure, and be open court
To tunnel tunnel face.
The utility model has the beneficial effects that compared with prior art, the utility model by being provided with trident air hose, and
Ball valve and safety valve are respectively set on 2 blast pipes on it, during normal construction, where closed safe valve on blast pipe
Ball valve, in addition the ball valve of blast pipe is opened, and fresh air can be sent to tunnel tunnel face, dilutes gas, is reduced watt
This concentration, avoids methane accumulation.When tunnel prolonged shutdowns, the ball valve on blast pipe where safety valve is opened, in addition one into
The ball valve of air hose is closed, and when tunnel internal gas density is exceeded, opens the air compressor machine at hole, under the action of wind pressure, safety
Valve automatically opens, so that it may to face air feed, to reach dilution gas, reduce the purpose of gas density.
The utility model can reduce gas density in gas tunnel under special circumstances, reach and eliminate safe hidden trouble, protect
Demonstrate,prove construction speed, save the cost, the purpose for ensureing safety of life and property.It, can in time will be in hole by live service condition
Gas density reduces, and eliminates safe hidden trouble, and it is at low cost, convenient to use, be hardly damaged, anti-vibration and pollution capacity
By force, good economic benefit is achieved.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the utility model；
Attached drawing 2 is the side structure schematic diagram of attached drawing 1.
Appended drawing reference: 1- trident air hose, the first blast pipe of 2-, the second blast pipe of 3-, 4- air-exhausting duct, 5- high-pressure air hose,
6- ball valve, 7- safety valve, the distinguished and admirable diffuser of 8-.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples, but is not intended as to the utility model
The foundation of limitation.
The embodiments of the present invention: a kind of constructing tunnel prevention methane accumulation facility includes as shown in attached drawing 1-2
Trident air hose 1, trident air hose 1 are made of the first blast pipe 2, the second blast pipe 3 and air-exhausting duct 4,2 He of the first blast pipe
Second blast pipe 3 is connect with the high-pressure air hose of constructing tunnel 5, and 1 ball is respectively housed on the first blast pipe 2 and the second blast pipe 3
Safety valve 7 is also equipped on valve 6, the first blast pipe 2 or the second blast pipe 3.As shown, the present embodiment is used in the first air inlet
Ball valve 6 and safety valve 7 are installed on pipe 2, and the form of ball valve 6 is only installed on second blast pipe 3.High-pressure air hose 5 utilizes tunnel
The high-pressure air hose of road construction, trident air hose 1 are process using the seamless steel pipe of market purchase, and 50~90mm of diameter is equal
It can.And the ball valve bought on the market, safety valve are installed on trident air hose 1.Specific deployment scenarios are as illustrated in fig. 1 and 2.
The high-pressure air hose 5 is laid with from tunnel face into tunnel, and head end is connect with the air compressor machine outside tunnel face.
Before use, opening hole blower is sent into high-pressure blast, the ball valve 6 on the first blast pipe 2 is closed, opens the second blast pipe
Ball valve 6 on 3 checks the ventilation situation of trident air hose 1, if having air leakage phenomena；The ball valve being then shut off on the second blast pipe 3
6, the ball valve 6 on the first blast pipe 2 checks whether safety valve 7 can work normally.After all facilities are normal, can put into makes
With.
Specifically used operating procedure:
1, it before spreading and replacement air duct fabric, maintenance and maintenance blower etc. need to shut down blower operating, is opened at hole empty
Press, by high-pressure air hose 5 into tunnel air feed, close the first blast pipe 2 on ball valve 6, open the second blast pipe 3 on ball
Valve 6 is sent fresh air to air-exhausting duct 4 through the second blast pipe 3 by high-pressure air hose 5, is finally sent to from the discharge of 4 tail end of air-exhausting duct
Tunnel tunnel face dilutes gas, reduces gas density, avoids methane accumulation.
2, it does not divulge information normally in gas tunnel face prolonged shutdowns, face, face has methane accumulation and people again
When member cannot be introduced into.The ball valve 6 on the second blast pipe 3 is closed before stopping work in special circumstances this, opens the first air inlet
Ball valve 6 on pipe 2.Once gas concentration over-standard in hole can be by opening hole air compressor machine, new when personnel cannot be introduced into
Fresh air is sent by high-pressure air hose 5 into trident air hose 1, and under the action of wind pressure, the safety valve 7 on the first blast pipe 2 is certainly
Dynamic to open, wind-force is sent through the first blast pipe 2 to air-exhausting duct 4 from high-pressure air hose 5, is finally discharged from air-exhausting duct 4, so that it may to area
Face air feed reduces the purpose of gas density to reach dilution gas.
The air-exhausting duct 4 is connect with the distinguished and admirable diffuser 8 being mounted on tunnel vault.Distinguished and admirable diffuser 8 can be rapidly
The fresh control that will be fed into diffuses in entire tunnel, and is mounted on vault, facilitates wind-force from top to bottom quickly to spray, reaches
To dilution gas, the purpose of gas density is reduced.
The trident air hose 1 is fixed on the tunnel surface Chu Zhi.It can be weldingly fixed on using setscrew or directly
On first branch arch.Guarantee the secured of facility.
The distinguished and admirable diffuser 8 is shower nozzle structure, is open towards tunnel tunnel face.Distinguished and admirable diffuser 8 utilizes 5mm
Thick steel plate is processed into flat horn shape, and horn mouth closes the iron of one piece of 5mm thickness towards tunnel tunnel face, in horn mouth position
Plate punches on iron plate, aperture about 2mm, central point of hole spacing about 5mm.Distinguished and admirable diffuser 8 is utilized into fixed anchor bolt
Or anchor pole is fixed on tunnel central term, and is connect with trident air hose 1.
Claims (4)
1. a kind of constructing tunnel prevents methane accumulation facility, it is characterised in that: include trident air hose (1), trident air hose
(1) it is made of the first blast pipe (2), the second blast pipe (3) and air-exhausting duct (4), the first blast pipe (2) and the second blast pipe
(3) it is connect with the high-pressure air hose of constructing tunnel (5), 1 ball valve is respectively housed on the first blast pipe (2) and the second blast pipe (3)
(6), be also equipped with safety valve (7) on the first blast pipe (2) or the second blast pipe (3), the high-pressure air hose (5) from tunnel face to
It is laid in tunnel, head end is connect with the air compressor machine outside tunnel face.
2. constructing tunnel according to claim 1 prevents methane accumulation facility, it is characterised in that: the air-exhausting duct (4) with
Distinguished and admirable diffuser (8) connection being mounted on tunnel vault.
3. constructing tunnel according to claim 1 prevents methane accumulation facility, it is characterised in that: the trident air hose
(1) it is fixed on the tunnel surface Chu Zhi.
4. constructing tunnel according to claim 2 prevents methane accumulation facility, it is characterised in that: the distinguished and admirable diffuser
(8) it is shower nozzle structure, is open towards tunnel tunnel face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920005278.6U CN209724407U (en) | 2019-01-03 | 2019-01-03 | A kind of constructing tunnel prevention methane accumulation facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920005278.6U CN209724407U (en) | 2019-01-03 | 2019-01-03 | A kind of constructing tunnel prevention methane accumulation facility |
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| Publication Number | Publication Date |
|---|---|
| CN209724407U true CN209724407U (en) | 2019-12-03 |
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ID=68678980
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920005278.6U Active CN209724407U (en) | 2019-01-03 | 2019-01-03 | A kind of constructing tunnel prevention methane accumulation facility |
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| Country | Link |
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| CN (1) | CN209724407U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565553A (en) * | 2021-07-22 | 2021-10-29 | 中交第二公路工程局有限公司 | Ventilation system and general gas tunnel comprehensive rapid disposal system |
-
2019
- 2019-01-03 CN CN201920005278.6U patent/CN209724407U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565553A (en) * | 2021-07-22 | 2021-10-29 | 中交第二公路工程局有限公司 | Ventilation system and general gas tunnel comprehensive rapid disposal system |
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