CN211777553U - Air storage structure and air storage equipment - Google Patents
Air storage structure and air storage equipment Download PDFInfo
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- CN211777553U CN211777553U CN202020327877.2U CN202020327877U CN211777553U CN 211777553 U CN211777553 U CN 211777553U CN 202020327877 U CN202020327877 U CN 202020327877U CN 211777553 U CN211777553 U CN 211777553U
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Abstract
The utility model discloses an air storage structure and air storage facilities, the tunnel is applied to the air storage structure, and the air storage structure includes: the air storage device comprises an air inlet pipeline, an air outlet pipeline and a storage air chamber, wherein one end of the storage air chamber is connected to the air inlet pipeline, the other end of the storage air chamber is connected to the air outlet pipeline, the storage air chamber is provided with an air storage cavity communicated with the air inlet pipeline and the air outlet pipeline, and construction air is stored in the air storage cavity. The technical scheme of the utility model enough air can be guaranteed and tunnel construction operation face or other tunnels are branched through relay transmission to, and then effectively guarantee the air feed volume, normal construction in the assurance tunnel.
Description
Technical Field
The utility model relates to a tunnel engineering technical field especially relates to an air storage structure and air storage equipment.
Background
In the tunnel work progress, the tunnel is only constructed exit position and external intercommunication usually, and the tunnel is inside to be in semi-enclosed state, and inside the unable effective flow tunnel of outside air, and constructor and construction equipment all need fresh air to accomplish the operation, consequently adopt entrance to a cave axial fan to add the wind section of thick bamboo cloth pipeline and impress outside fresh air to the tunnel operation face among the correlation technique to guarantee personnel and equipment can normally operate. But because the tunnel is longer, the air is along dryer cloth long distance transmission, and the amount of wind loss is great and the wind pressure is not enough, can't effectively improve the inside air circumstance in tunnel, influences the construction operation.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
Based on this, aiming at the problem that the air quantity loss occurs when the air is transmitted in the pipeline, the air quantity transmitted to the construction working face is very small, and the continuous construction is influenced, it is necessary to provide an air storage structure and an air storage device, aiming at reducing the air quantity loss and ensuring the normal construction.
In order to achieve the above object, the utility model provides an air storage structure is applied to the tunnel, include:
the air inlet pipeline is arranged along the in-and-out direction of the tunnel; and
and one end of the storage air chamber is connected to the air inlet pipeline, the other end of the storage air chamber is connected to the air outlet pipeline, and the storage air chamber is provided with a gas storage cavity communicated with the air inlet pipeline and the air outlet pipeline.
Optionally, the storage plenum includes a housing, the housing includes a top plate and a side plate connected to each other, the tunnel includes a side wall surface and a bottom surface, the side of the top plate far away from the side plate abuts against the side wall surface of the tunnel, the side plate far away from the top plate end abuts against the bottom surface of the tunnel, and the top plate, the side wall surface and the bottom surface enclose to form the gas storage cavity.
Optionally, a sealing gasket is arranged at a contact position of the top plate and the side wall surface of the tunnel;
and/or a sealing gasket is arranged at the contact position of the side plate and the bottom surface of the tunnel.
Optionally, the storage plenum is further provided with an increment cavity, and the increment cavity is arranged on the side wall surface of the tunnel and is communicated with the storage cavity.
Optionally, the air outlet pipeline is provided with a relay fan.
Optionally, a fastening piece is arranged at a connecting position of the air inlet pipeline and the storage air chamber, the fastening piece comprises a first fastening part arranged on the air inlet pipeline, the fastening piece further comprises a second fastening part arranged on the storage air chamber, and the first fastening part and the second fastening part are in butt joint fastening to connect the air inlet pipeline and the storage air chamber;
or a fastening piece is arranged at the connecting position of the air outlet pipeline and the storage air chamber, the fastening piece comprises a first fastening part arranged on the air outlet pipeline and a second fastening part arranged on the storage air chamber, and the first fastening part and the second fastening part are butted and fastened to connect the air outlet pipeline and the storage air chamber;
or, the connecting positions of the air inlet pipeline and the air outlet pipeline with the storage air chamber are both provided with fasteners, the fasteners comprise first fastening parts arranged on the air inlet pipeline and the air outlet pipeline, the fasteners further comprise second fastening parts arranged on the storage air chamber, the first fastening parts and the second fastening parts are in butt joint fastening, and the air inlet pipeline and the air outlet pipeline are connected with the storage air chamber.
Optionally, a sealing ring is arranged on a contact surface between the first fastening part and the second fastening part.
Optionally, a filtering component is detachably mounted in the storage air chamber, and the filtering component filters air passing through the air inlet pipeline to the air outlet pipeline.
Optionally, the air storage structure comprises a plurality of storage air chambers, the storage air chambers are arranged in the tunnel at intervals, and the storage air chambers are communicated in series.
In addition, in order to realize above-mentioned purpose, the utility model also provides an air stock equipment, including forced draught blower and the above air storage structure, the forced draught blower set up in admission line one side, the forced draught blower with the outside air in tunnel conveying to in the admission line.
The utility model provides an among the technical scheme, set up inlet line and pipeline of giving vent to anger respectively at savings plenum both ends, savings plenum has the gas storage and holds the chamber, and the volume that the gas storage held the chamber is great, holds the intracavity storage at the gas storage and has a large amount of clean air. The air storage chamber can ensure that enough air is relayed and transmitted to a working face or branched to other tunnels through the axial flow fan, thereby effectively ensuring the air supply amount and ensuring the normal construction in the tunnels.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of an air storage structure of the present invention;
FIG. 2 is a schematic diagram of the reservoir plenum of FIG. 1;
FIG. 3 is a schematic structural view of the installation position of the saving air chamber of the present invention;
FIG. 4 is a schematic view of the installation section of the saving plenum of the present invention;
FIG. 5 is a schematic view of a local structure for mounting the housing of the present invention;
fig. 6 is a schematic cross-sectional view of the fastener of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Referring to fig. 1 and 2, an air storage structure provided in this embodiment is applied to a tunnel 10, especially a plateau tunnel, and has a higher altitude and a thin air, so that sufficient air needs to be stored more, and when construction is started, air meeting construction requirements can be provided as quickly as possible. The method comprises the following steps: an inlet duct 20, a reservoir plenum 30 and an outlet duct 40.
One end of the storage air chamber 30 is connected to the air inlet pipe 20, the other end of the storage air chamber 30 is connected to the air outlet pipe 40, the storage air chamber 30 is provided with an air storage cavity communicated with the air inlet pipe 20 and the air outlet pipe 40, construction air is stored in the air storage cavity, and the space in the air storage cavity of the storage air chamber is usually large, for example, 100 cubic meters. When the construction is suspended, the air supply to the construction work surface is suspended. At this time, a large amount of air is stored in the storage air chamber 30, and when the construction needs to be performed again, the air is delivered, and the air stored in the storage air chamber can be released in time and is delivered to the construction work surface through the air outlet pipeline 40.
In the technical scheme provided in this embodiment, the air inlet pipe 20 and the air outlet pipe 40 are respectively disposed at two ends of the storage air chamber 30, the storage air chamber 50 has a storage cavity with a large volume, and a large amount of clean air for construction is stored in the storage cavity. Under the condition that air volume is lost, air in the air storage chamber 50 can be released through the air outlet pipeline 40 and relayed to a working face or branched to other roadways through the axial flow fans connected in series with the air outlet pipeline, and therefore normal construction is effectively guaranteed.
Referring to fig. 3 and 4, the storage plenum 30 includes a housing, the housing 320 includes a top plate 321 and a side plate 322 connected to each other, the tunnel 10 includes a side wall surface 110 and a bottom surface 120, a side of the top plate 321 away from the side plate 322 abuts against the side wall surface 110 of the tunnel 10, an end of the side plate 322 away from the top plate 321 abuts against the bottom surface 120 of the tunnel 10, and the top plate 321, the side plate 322, the side wall surface 110 and the bottom surface 120 enclose to form a storage cavity.
It will be appreciated that the housing 320 snaps onto the inner wall surface of the tunnel 10. Through the side wall surface 110 and the bottom surface 120 of the tunnel 10, the structure of the tunnel 10 is fully utilized, so that the material for constructing the storage air chamber 30 can be saved, and the storage air chamber can be effectively formed. In addition, since the tunnel 10 is generally constructed of cement or concrete, the surface of the tunnel 10 is not smooth enough, and gaps may be generated at the positions where the top plate 321 and the side plates 322 abut against the tunnel 10, and air stored in the storage plenum 30 may leak to the outside environment through the gaps, as shown in fig. 5, the sealing gaskets 330 are provided at the positions where the top plate 321 abuts against the side wall surfaces 110, and the positions where the side plates 322 abut against the bottom surface 120, and the leakage of air stored in the storage plenum 30 can be reduced by the sealing effect of the sealing gaskets 330. Further, a fixing member 340 is provided at a position where the top plate 321 and the side wall surface 110 abut, and the top plate 321 and the side wall surface 110 are further fixed together by the fixing member 340 passing through the gasket 330. For example by means of screws. Similarly, a gasket 330 is provided at a position where the side plate 322 abuts against the bottom surface 120, and the side plate 322 is fixed to the bottom surface 120 by a fixing member 340.
In one embodiment, the reservoir plenum 30 is further provided with an incremental volume 350, the incremental volume 350 being disposed on the sidewall surface 110 of the tunnel 10 and communicating with the reservoir volume. The incremental volume 350 can expand the volume of the reservoir plenum 30 so that the reservoir plenum 30 can have sufficient storage capacity to store more air to meet usage requirements. In addition, the storage air chamber 30 is provided on the sidewall surface 110 of the tunnel 10, avoiding the middle transportation passage, and can ensure the storage of air without affecting the construction transportation. After the construction is completed, the incremental volume 350 may be backfilled to ensure the integrity of the sidewall 110 inside the tunnel 10 and to ensure the support strength of the sidewall 110.
In one embodiment, the air outlet pipe 40 is provided with a relay fan 70. The relay fan 70 is used for enhancing the airflow pressure in the air outlet pipeline 40. The relay fan 70 may be an axial flow fan, air is transported in the duct for a long distance, and the air volume and pressure are reduced by molecular impact inside the air flow and friction between the air flow and the inner wall of the duct. When the relay fan 70 is operated, the air is driven to flow forward, sufficient power is provided for the air in the pipeline, the air pressure is ensured, and the air in the pipeline can be quickly transmitted to a construction working face. In addition, the relay fan 70 is generally heavier than the air outlet duct 40, and in order to ensure that the air inlet duct 20 and the air outlet duct 40 maintain the same height above the ground, a support frame is disposed below the relay fan 70, so as to avoid the deformation of the duct caused by the gravity of the relay fan 70.
Referring to fig. 6, the inlet duct 20 and the outlet duct 40 are connected to the reservoir plenum 30 in three ways.
In the first connection mode, a fastening member 80 is disposed at a connection position between the air inlet duct 20 and the storage air chamber 30, the fastening member 80 includes a first fastening portion 810 disposed on the air inlet duct 20, the fastening member 80 further includes a second fastening portion 820 disposed on the storage air chamber 30, and the first fastening portion 810 and the second fastening portion 820 are butted and fastened to connect the air inlet duct 20 and the storage air chamber 30.
In a second connection mode, a fastening member 80 is disposed at a connection position between the air outlet pipe 40 and the storage air chamber 30, the fastening member 80 includes a first fastening portion 810 disposed on the air outlet pipe 40, the fastening member 80 further includes a second fastening portion 820 disposed on the storage air chamber 30, and the first fastening portion 810 and the second fastening portion 820 are butted and fastened to connect the air outlet pipe 40 and the storage air chamber 30.
In a third connection mode, the connecting positions of the air inlet pipeline 20 and the air outlet pipeline 40 with the storage air chamber 30 are both provided with fasteners 80, each fastener 80 comprises a first fastening part 810 arranged on the air inlet pipeline 20 and the air outlet pipeline 40, each fastener 80 further comprises a second fastening part 820 arranged on the storage air chamber 30, and the first fastening parts 810 and the second fastening parts 820 are butted and fastened to connect the air inlet pipeline 20 and the air outlet pipeline 40 with the storage air chamber 30.
Additionally, the fastener 80 is, for example, a flange. The first fastening portion 810 and the second fastening portion 820 are respectively provided with corresponding screw holes, and screws are provided in the screw holes to fix the first fastening portion 810 and the second fastening portion 82 together, thereby enabling the air inlet duct 20 and the air outlet duct 40 to communicate with the reservoir air chamber 30.
In one embodiment, a sealing ring 830 is disposed at the interface between the first fastening portion 810 and the second fastening portion 820. The position between first fastening portion 810 and second fastening portion 820 is because the influence of the dynamics of fastening or contact surface roughness, there may be the clearance, sets up sealing washer 830 through the contact surface, can avoid the air to be the loss outside through the contact surface.
In one embodiment, a filter member 310 is detachably installed in the storage plenum 30, and the filter member 310 filters air passing through the inlet duct 20 to the outlet duct 40. The air in the air storage chamber 30 may have dust or other impurities during the pipeline transmission process, and the air can be filtered through the filtering component 310, so that the air transmitted to the construction work surface is ensured to be cleaner. The filter 310 may be disposed at a middle portion of the storage plenum 30, and the filter 310 may be disposed on the entire surface thereof according to a cross-sectional area of the storage plenum 30. In addition, the storage air chamber 30 has a large volume, but the air inlets and the air outlets at the front end and the rear end are small, so that the filter parts 310 can be correspondingly arranged according to the positions of the air inlets and the air outlets, and the effective filter areas of the filter parts 310 can be correspondingly arranged according to the area sizes of the air inlets and the air outlets, so that the air can be effectively filtered, the filter area can be saved, and the filter material can be saved.
Further, the filtering part 310 may include three filters, i.e., at least one of a primary filter, a middle filter, and a chemical filter, and the air in the tunnel 10 is filtered by the primary filter, the middle filter, and the chemical filter in sequence. The primary filter is used for filtering large-particle substances, the intermediate filter is used for filtering small-particle substances, and the chemical filter is used for filtering waste gas generated by drilling and rock drilling in a tunnel, operation of construction equipment, explosive blasting and the like.
In one embodiment, the air storage structure includes a plurality of storage plenums 30, the storage plenums 30 being spaced apart within the tunnel 10, the plurality of storage plenums 30 being in series communication, at least one of the storage plenums 30 being provided with an oxygen content detection assembly 60. Since the construction distance of the tunnel 10 is usually long, generally 5km or more, a plurality of storage plenums 30 are required to ensure the air demand of the construction work surface. The storage air chambers 30 are connected in series, that is, the storage air chambers 30 are sequentially communicated with the pipeline from the entrance and exit position of the tunnel 10 to the construction work surface.
Further, the gas storage holds the intracavity and still is equipped with oxygen content detection subassembly 60, and the air storage structure still includes: an oxygen producing chamber 50, wherein the oxygen producing chamber 50 is provided with an oxygen conveying pipeline communicated with the air inlet pipeline 20, and the oxygen content detecting component 60 is connected to the oxygen producing chamber 50. Specifically, the oxygen content detecting assembly 60 is further connected to the oxygen generating chamber 50 through a signal line 610, a control terminal (not shown) is disposed inside the oxygen generating chamber 50, the control terminal is used for controlling the amount of oxygen output from the oxygen generating chamber 50, specifically, the oxygen content detecting assembly 60 can detect the oxygen content in the environment, the normally set standard oxygen content is 18% -20%, when the oxygen content detecting assembly 60 detects that the oxygen content is lower than 18%, the detected signal is transmitted to the oxygen generating chamber 50 through the signal line 610, the oxygen generating chamber 50 increases the oxygen production amount, and transmits more oxygen to the air inlet pipe 20 through the oxygen transmission pipe 510, so as to improve the condition of low oxygen content. When the oxygen content detecting assembly 60 detects that the oxygen content is higher than 20%, the detected signal is transmitted to the oxygen generating chamber 50 through the signal line 610, and the oxygen generating chamber 50 reduces the oxygen production amount, or the oxygen transmission pipe 510 is closed, so that the oxygen amount transmitted to the air inlet pipe 20 is reduced, and the condition that the oxygen content is high is improved. Therefore, the oxygen content of the construction working face can be flexibly adjusted through the oxygen content detection assembly 60, and normal operation of personnel and equipment is guaranteed.
In one embodiment, the inlet duct 20, outlet duct 40 and storage plenum 30 are made of plastic steel. The plastic steel material is an existing material, the modular design of the air inlet pipeline 20, the air outlet pipeline 40 and the storage air chamber 30 can be facilitated through the plastic steel, the plastic steel material is easy to disassemble after construction is finished, the disassembled parts can be reassembled, and the plastic steel material can be used for new tunnel construction.
The utility model also provides an air stock equipment, including forced draught blower 90 and as above air storage structure, forced draught blower 90 sets up in intake duct 20 one side, and forced draught blower 90 conveys the outside air in tunnel 10 to intake duct 20 in.
The air storage structure is applied to the tunnel 10, especially a plateau tunnel, and because the altitude is higher, the air is thin, and more needs to preserve sufficient air, when starting construction, can provide the air meeting the construction requirements as soon as possible. The air storage structure includes: an inlet duct 20, a reservoir plenum 30 and an outlet duct 40.
One end of the storage air chamber 30 is connected to the air inlet pipe 20, the other end of the storage air chamber 30 is connected to the air outlet pipe 40, the storage air chamber 30 is provided with an air storage cavity communicated with the air inlet pipe 20 and the air outlet pipe 40, construction air is stored in the air storage cavity, and the space in the air storage cavity of the storage air chamber is usually large, for example, 100 cubic meters. When the construction is suspended, the air supply to the construction work surface is suspended. At this time, a large amount of air is stored in the storage air chamber 30, and when the construction needs to be performed again, the air is delivered, and the air stored in the storage air chamber can be released in time and is delivered to the construction work surface through the air outlet pipeline 40.
In the technical scheme provided in this embodiment, the air inlet pipe 20 and the air outlet pipe 40 are respectively disposed at two ends of the storage air chamber 30, the storage air chamber 50 has a storage cavity with a large volume, and a large amount of clean air for construction is stored in the storage cavity. Under the condition that air volume is lost, air in the air storage chamber 50 can be released through the air outlet pipeline 40 and relayed to a working face or branched to other roadways through the axial flow fans connected in series with the air outlet pipeline, and therefore normal construction is effectively guaranteed.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.
Claims (10)
1. An air storage structure for use in a tunnel, comprising:
the air inlet pipeline is arranged along the in-and-out direction of the tunnel; and
and one end of the storage air chamber is connected to the air inlet pipeline, the other end of the storage air chamber is connected to the air outlet pipeline, and the storage air chamber is provided with a gas storage cavity communicated with the air inlet pipeline and the air outlet pipeline.
2. The air storage structure of claim 1, wherein said storage plenum comprises a housing, said housing comprising a top plate and a side plate connected thereto, said tunnel comprising a side wall surface and a bottom surface, a side of said top plate distal from said side plate abutting a side wall surface of said tunnel, an end of said side plate distal from said top plate abutting a bottom surface of said tunnel, said top plate, said side wall surface and said bottom surface enclosing said storage volume.
3. The air storage structure as claimed in claim 2, wherein a sealing gasket is provided at a position where the top plate contacts with the side wall surface of the tunnel;
and/or a sealing gasket is arranged at the contact position of the side plate and the bottom surface of the tunnel.
4. The air storage structure as claimed in claim 1, wherein said reservoir plenum is further provided with an incremental volume, said incremental volume being provided on a side wall surface of said tunnel and communicating with said reservoir volume.
5. An air storage structure as claimed in any of claims 1 to 4, wherein the outlet duct is provided with a relay fan.
6. The air storage structure as claimed in any one of claims 1 to 4, wherein a fastening member is provided at a position where the air intake duct is connected to the storage plenum, the fastening member including a first fastening portion provided to the air intake duct, the fastening member further including a second fastening portion provided to the storage plenum, the first fastening portion and the second fastening portion being butt-fastened to connect the air intake duct to the storage plenum;
or a fastening piece is arranged at the connecting position of the air outlet pipeline and the storage air chamber, the fastening piece comprises a first fastening part arranged on the air outlet pipeline and a second fastening part arranged on the storage air chamber, and the first fastening part and the second fastening part are butted and fastened to connect the air outlet pipeline and the storage air chamber;
or, the connecting positions of the air inlet pipeline and the air outlet pipeline with the storage air chamber are both provided with fasteners, the fasteners comprise first fastening parts arranged on the air inlet pipeline and the air outlet pipeline, the fasteners further comprise second fastening parts arranged on the storage air chamber, the first fastening parts and the second fastening parts are in butt joint fastening, and the air inlet pipeline and the air outlet pipeline are connected with the storage air chamber.
7. The air storage structure as claimed in claim 6, wherein a sealing ring is provided at a contact surface between the first fastening portion and the second fastening portion.
8. The air storage structure as claimed in any one of claims 1 to 4, wherein a filter member is detachably mounted in said reservoir chamber, said filter member filtering air passing through said inlet duct to said outlet duct.
9. An air storage structure as claimed in any of claims 1 to 4, wherein said air storage structure includes a plurality of said reservoir plenums spaced apart within said tunnel, said reservoir plenums being connected in series.
10. An air storage device characterized by comprising a blower provided on a side of the intake duct, the blower delivering tunnel outside air into the intake duct, and an air storage structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020327877.2U CN211777553U (en) | 2020-03-16 | 2020-03-16 | Air storage structure and air storage equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020327877.2U CN211777553U (en) | 2020-03-16 | 2020-03-16 | Air storage structure and air storage equipment |
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| CN211777553U true CN211777553U (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685218A (en) * | 2021-08-31 | 2021-11-23 | 中铁二院工程集团有限责任公司 | Tunnel air supply system based on oxygen-enriched air storage air oxygenation |
-
2020
- 2020-03-16 CN CN202020327877.2U patent/CN211777553U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685218A (en) * | 2021-08-31 | 2021-11-23 | 中铁二院工程集团有限责任公司 | Tunnel air supply system based on oxygen-enriched air storage air oxygenation |
| CN113685218B (en) * | 2021-08-31 | 2023-06-16 | 中铁二院工程集团有限责任公司 | Tunnel air supply system based on oxygen-enriched air storage air oxygenation |
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