CN115614884A - Oxygen-enriched dirt-isolating device and dirt-isolating method for plateau tunnel construction - Google Patents
Oxygen-enriched dirt-isolating device and dirt-isolating method for plateau tunnel construction Download PDFInfo
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- CN115614884A CN115614884A CN202211426386.3A CN202211426386A CN115614884A CN 115614884 A CN115614884 A CN 115614884A CN 202211426386 A CN202211426386 A CN 202211426386A CN 115614884 A CN115614884 A CN 115614884A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/003—Ventilation in combination with air cleaning
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Abstract
The invention discloses an oxygen-enriched dirt-isolating device and a dirt-isolating method for plateau tunnel construction, and relates to the technical field of plateau oxygen supplementing purification. The invention comprises an oxygen-enriched dirt-isolating processor, a tail end hose transmission and distribution system and a top free sliding system; the top free sliding system comprises a suspension sliding rail arranged at the upper part of the tunnel trolley through a fixing piece, a pulley connected to the inner wall of the suspension sliding rail in a sliding manner, and blocking pieces fixedly connected to the two ends of the suspension sliding rail and used for limiting the pulley to be separated from the suspension sliding rail; terminal transmission and distribution system includes fixed connection in the platform at pulley top, and the lower fixed surface of platform is connected with the air supply pipe, and the one end joint of air supply pipe has the shunt that is used for the reposition of redundant personnel air, and one side intercommunication of air supply pipe is provided with scalable hose. The invention provides clean, healthy, oxygen-enriched and micro-hydrogen air for constructors in the construction process of the tunnel face of the high-altitude tunnel without influencing the construction progress of the constructors and increasing the physical burden of the constructors, and has the characteristics of flexibility, changeability, safety, reliability, health, convenience and the like.
Description
Technical Field
The invention belongs to the technical field of oxygen supplement and purification in plateaus, and particularly relates to an oxygen-enriched dirt-isolating device and a dirt-isolating method for plateau tunnel construction.
Background
The tunnel in the plateau area has low air pressure and low oxygen content in air, and the ventilation is increasingly difficult along with the advancing of the tunnel face. Blasting of the tunnel face results in high concentration of nearby dust and reduced air quality. The concentration of tail gas pollutants discharged by large machinery near the tunnel face due to low-oxygen combustion is increased sharply, and the air quality is further reduced. Workers near the palm surface have high labor intensity and rapidly increase oxygen consumption, but the oxygen content of air is low, so that alveoli automatically expand to meet the oxygen consumption requirement, polluted gas and dust absorbed into the bodies are rapidly increased, occupational diseases are high, breathing is difficult, and the physical health of the workers is influenced.
Disclosure of Invention
The invention aims to provide an oxygen-enriched and dirt-isolating device and a dirt-isolating method for plateau tunnel construction, which are used for ensuring the health of constructors in a plateau tunnel and providing clean oxygen-enriched air with a health-care function for the constructors on the premise of not influencing the working efficiency.
In order to solve the technical problem, the invention provides an oxygen-enriched dirt-separating device for plateau tunnel construction, which comprises: comprises an oxygen-enriched dirt-isolating processor, a tail end hose transmission and distribution system and a top free sliding system;
the top free sliding system comprises a hanging slide rail arranged at the upper part of the tunnel trolley through a fixing part, a pulley connected to the inner wall of the hanging slide rail in a sliding way, and a barrier part fixedly connected to the two ends of the hanging slide rail and used for limiting the pulley to be separated from the hanging slide rail;
the terminal transmission and distribution system comprises a platform fixedly connected to the top of the pulley, an air supply pipe is fixedly connected to the lower surface of the platform, a diverter used for shunting air is clamped at one end of the air supply pipe, a telescopic hose is arranged on one side of the air supply pipe in a communicated mode, the diverter is matched with the oxygen-enriched dirt separation processor through the telescopic hose, and four groups of transmission and distribution components are arranged on the outer wall of the diverter in a communicated mode.
Further, the shunt is hemispherical and the inside gas storage cavity that is used for the dispersed air that forms, the bottom fixedly connected with joint of air supply pipe is protruding, the shunt joint is at the bellied outer wall of joint.
Furthermore, the shunt can carry out 360 rotations for the joint arch at the bellied outer wall of joint, the shunt is provided with the rubber circle that is used for constituting seal structure with the air supply pipe department of being connected.
Further, the transmission and distribution subassembly includes four group fixed connection in the shunt outer wall and the flexible hose that is linked together with the shunt, flexible hose's one end intercommunication is provided with respirator, respirator's edge bonds and has flexible silica gel strip, and the air delivery after directly will purifying through respirator is to user's department of breathing, has effectively improved the security.
Further, the oxygen boosting separates dirty treater and includes the casing, the inner diapire of casing has set gradually air cleaner, hydrogen absorption machine, oxygenerator and battery from a left side to the right side, the front of casing is provided with the display screen, the battery is used for providing the power to display screen, air cleaner, hydrogen absorption machine and oxygenerator, and the battery carries out direct power supply, has realized the portability of device.
Further, one side of the shell is provided with an air inlet, air outlets are formed in two sides of the upper surface of the shell and communicated with each other through a pipeline, and air of the air inlet is purified and then discharged from the air outlets to achieve air circulation.
Furthermore, the middle part of the back of the shell is slidably connected with an access door, and the access door is convenient for personnel to directly overhaul components in the shell.
Furthermore, the inner side wall of the air inlet is fixedly connected with a coarse screening filter screen plate and a fine screening filter screen plate respectively, the coarse screening filter screen plate is located on the outer side of the air inlet, the coarse screening filter screen plate can directly filter large-particle impurities, and the fine screening filter screen plate can further filter filtered air.
A pollution isolation method for plateau tunnel construction comprises an oxygen-enriched pollution isolation device and a pollution isolation method for plateau tunnel construction, and further comprises the following operation steps:
s1, air compression and filtration: air enters the air compressor through the primary filter screen and the intermediate filter screen and is conveyed to the air filter by the air compressor;
s2, air adsorption and impurity removal: after passing through an air filter, air is conveyed to an air storage tank, and then enters an activated carbon adsorbent after being dried;
s3, mixing air: the adsorbed air is divided into two paths, one path of the air passes through a PSA adsorption tower to prepare air with the oxygen concentration of more than 35 percent, the other path of the air does not undergo any treatment, and the two paths of the air are mixed according to the oxygen concentration measured by a program controller;
s4, controlling the hydrogen content: controlling the hydrogenation flow through a hydrogen absorber to ensure that the concentration of the mixed hydrogen is lower than 2 percent;
s5, air sterilization: the sterilizer performs sterilization and filtration on the mixed air;
s6, air supply: and conveying the filtered hydrogen to a tail end hose transmission and distribution system for use.
The invention has the following beneficial effects:
through the setting of oxygen boosting dirt separation treater, the oxygen boosting dirt separation treater can directly carry out purification treatment to the air, provide cleanly for constructor, healthily, the oxygen boosting, little hydrogen's air, it is healthy to ensure personnel, through suspending the slide rail in midair, the setting of pulley and terminal transmission and distribution system, terminal transmission and distribution system can be through the pulley horizontal slip in suspending the slide rail in midair, thereby the convenience is used in the position of difference, through the shunt, the air supply pipe, the setting of rubber circle and transmission and distribution subassembly, the shunt can rotate and realize sealedly rotating the in-process through the rubber circle for the air supply pipe, thereby make things convenient for personnel's rotatory use, the risk that the pipe fitting winding blockked has been reduced, the continuous supply of air has been guaranteed, do not influence personnel's construction progress, do not increase personnel's health burden, it is nimble simultaneously, safety and reliability, healthy convenient characteristics.
Of course, it is not necessary for any product to achieve all of the above advantages at the same time in the practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the drawings provided to one of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic block diagram of the system of the present invention;
FIG. 2 is a schematic structural view of the top free slide system of the present invention;
FIG. 3 is a partial schematic structural view of the top free slide system of the present invention;
FIG. 4 is a schematic structural diagram of the oxygen-enriched dirt-separating processor of the present invention;
FIG. 5 is a schematic view of the structure of the sliding rail and the air distributor of the present invention;
FIG. 6 is a flow chart of the air pollution isolation method of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a housing; 2. an air filter; 3. a hydrogen absorption machine; 4. an oxygen generator; 5. a storage battery; 6. a display screen; 7. an air outlet; 8. a suspended slide rail; 9. a platform; 10. a pulley; 11. a barrier; 12. a flexible hose; 13. a gas supply pipe; 14. a flow divider; 15. an elastic hose; 16. a rubber ring; 17. clamping the bulges; 18. a respiratory mask; 19. an air inlet; 20. an access door.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention relates to an oxygen-rich dirt-separating device for plateau tunnel construction, which comprises an oxygen-rich dirt-separating processor, a tail end hose transmission and distribution system and a top free sliding system;
the top free sliding system comprises a suspension sliding rail 8 arranged at the upper part of the tunnel trolley through a fixing part, a pulley 10 connected to the inner wall of the suspension sliding rail 8 in a sliding manner, and blocking parts 11 fixedly connected to two ends of the suspension sliding rail 8 and used for limiting the pulley 10 to be separated from the suspension sliding rail 8, wherein the pulley 10 can horizontally and smoothly drive the tail end transmission and distribution system to move in the suspension sliding rail 8 so as to be convenient for different people to use, the blocking parts 11 are arranged at the end part of the suspension sliding rail 8 in order to avoid the pulley 10 from being separated from the suspension sliding rail 8, and the blocking parts 11 form effective limitation on the suspension sliding rail 8, so that the integral stability is ensured;
terminal transmission and distribution system includes platform 9 at fixed connection 10 tops in the pulley, platform 9 passes through pulley 10 sliding connection and suspends in midair on slide rail 8, on the one hand can improve platform 9's stability, on the other hand still can pass through platform 9 and pulley 10's cooperation, realize the free removal of shunt 14, platform 9's lower fixed surface is connected with air supply pipe 13, air supply pipe 13's one end joint has the shunt 14 that is used for shunting the air, one side intercommunication of air supply pipe 13 is provided with scalable hose 12, shunt 14 cooperatees with the dirty treater of oxygen boosting partition through scalable hose 12, the outer wall intercommunication of shunt 14 is provided with four groups of transmission and distribution subassemblies, scalable hose 12 is for having elastic universal hose, the hose is laid along the tunnel top, flagging to air handler behind both sides.
Aiming at the problems of low tunnel air pressure, low air oxygen content, high dust concentration near the tunnel face, smoke pollution and the like in a plateau area, the invention adopts a double-tower pressure swing adsorption oxygen generation technology, a multi-stage filtration purification adsorption technology and an oxygen concentration intelligent regulation and control technology, prepares oxygen with concentration of more than 35 percent by taking polluted air as a raw material, and realizes the personalized oxygen enrichment supply of different personnel numbers, different oxygen concentrations and high air cleanliness by an intelligent control system.
The invention also comprises a high-middle-low efficiency air filtering system, an air drying and purifying system, a PSA oxygen production system, a hydrogen absorption machine system, a PLC air mixing control system, a tail end air distribution system and a sliding track system.
The invention can stably provide clean air with oxygen content of 0.3g/L and hydrogen volume fraction of less than 2% in a tunnel with an altitude of 4000m or above, compared with the oxygen content in the atmosphere with the altitude of 4000m, the oxygen enrichment effect is improved by 64.3%, the PM2.5 of the air supplied to personnel is less than or equal to 50, the PM10 of the air supplied to personnel is less than or equal to 50, and the total amount of organic pollutants is less than 500ppb.
The device has the advantages that clean, healthy, oxygen-enriched and micro-hydrogen air is provided for constructors in the construction process of the tunnel face of the high-altitude tunnel, the body health of the constructors is guaranteed, the construction progress of the constructors is not affected, and the body burden of the constructors is not increased.
As shown in fig. 1, 2, 3, 4 and 5, the diverter 14 is hemispherical and has an air storage cavity formed therein for dispersing air, the bottom of the air supply pipe 13 is fixedly connected with a clamping protrusion 17, the diverter 14 is clamped on the outer wall of the clamping protrusion 17, air enters the diverter 14, first circulates in the air storage cavity, temporary storage of air is realized through the air storage cavity, and the stored air is dispersed through the diverter 14.
The shunt 14 can carry out 360 rotations for joint arch 17 at joint arch 17's outer wall, and the department that is connected of shunt 14 and air supply pipe 13 is provided with the rubber circle 16 that is used for constituting seal structure, sets the mode that can adjust between shunt 14 and the air supply pipe 13, can make things convenient for personnel's operation on the one hand, and on the other hand still can avoid the pipeline winding, has effectively improved security and stability.
The transmission and distribution subassembly includes four group fixed connection in 14 outer walls of shunt and the flexible hose 15 that is linked together with shunt 14, the one end intercommunication of flexible hose 15 is provided with respirator 18, there is flexible silica gel strip bonding in respirator 18's edge, the face of user can be laminated to flexible silica gel strip, meat-flavored silica gel strip's toughness is higher simultaneously, can improve the comfort level of wearing, two constraint areas of fixedly connected with are still gone back to every respirator 18, two constraint areas can improve the stability of wearing, flexible hose 15 has higher elasticity, the free flagging height of flexible hose 15 under the normal contraction state apart from ground 1.5m, the guarantee does not influence the construction under the situation of not dragging.
The oxygen-enriched dirt-separating processor comprises a shell 1, an air filter 2, a hydrogen absorption machine 3, an oxygen generator 4 and a storage battery 5 are sequentially arranged on the inner bottom wall of the shell 1 from left to right, a display screen 6 is arranged on the front face of the shell 1, and the storage battery 5 is used for providing power for the display screen 6, the air filter 2, the hydrogen absorption machine 3 and the oxygen generator 4.
One side of casing 1 is provided with air intake 19, and the both sides of casing 1 upper surface all are provided with air outlet 7, and two air outlets 7 communicate each other through the pipeline, and the middle part sliding connection at the 1 back of casing has access door 20, makes things convenient for personnel to overhaul the inside electrical components of casing 1 through access door 20, the inside wall difference fixedly connected with coarse screen filter screen board and the fine screen filter screen board of air intake, the coarse screen filter screen board is located the outside of air intake, and the coarse screen filter screen board can realize the direct filtration to large granule impurity, and the fine screen filter screen board can further filter filterable air.
Referring to fig. 1 to 6, the present invention provides a method for separating pollutants in plateau tunnel construction, including an oxygen-enriched and sewage-separating device for plateau tunnel construction, further including the following steps:
s1, air compression and filtration: air enters the air compressor through the primary filter screen and the intermediate filter screen and is conveyed to the air filter by the air compressor;
s2, air adsorption and impurity removal: after passing through an air filter, air is conveyed to an air storage tank, and then enters an activated carbon adsorbent after being dried;
s3, mixing air: the adsorbed air is divided into two paths, one path of the air passes through a PSA adsorption tower to prepare air with the oxygen concentration of more than 35 percent, the other path of the air does not undergo any treatment, and the two paths of the air are mixed according to the oxygen concentration measured by a program controller;
s4, controlling the hydrogen content: controlling the hydrogenation flow by a hydrogen absorption machine to ensure that the concentration of the mixed hydrogen is lower than 2 percent;
s5, air sterilization: the sterilizer performs sterilization and filtration on the mixed air;
s6, air supply: and conveying the filtered hydrogen to a tail end hose transmission and distribution system for use.
Specifically, the invention adopts the following process to carry out air treatment: air is compressed by an air compressor → an air filter → an air storage tank → air adsorption → a program controller pipeline → alternately enters two adsorption towers → is mixed with clean air → a hydrogen absorption machine hydrogenates → a sterilization filter → a conveying end hose.
The pipeline of the program controller is controlled by a programmable logic controller, the mixing proportion of the air conveyed by the oxygen generator and the clean air is controlled by an oxygen concentration signal fed back by an oxygen concentration sensor, the mixed oxygen concentration is ensured to be maintained in a set range, the flow information of the air flow sensor and the hydrogenation flow sensor is obtained by the air flow sensor and the hydrogenation flow sensor, the mixing proportion relation is obtained by conversion calculation, the hydrogenation flow is further controlled, and the concentration of hydrogen in the sent air is ensured to be lower than 2%. The hydrogen concentration is lower than 2% which is a safety threshold calculated under the most adverse situation according to the explosion lower limit of hydrogen, the size of the space in the tunnel, the ventilation frequency and the like, and the concentration has a health care effect on a human body and cannot generate explosion risks.
Specifically, when the oxygen-enriched dirt separation device and the dirt separation method for plateau tunnel construction are used, a worker firstly fixedly installs a suspension slide rail 8 on a tunnel trolley, when the oxygen-enriched dirt separation device and the dirt separation method are used, the worker directly wears a breathing mask 18, air enters an air filter 2 through an air inlet 19, then enters a telescopic hose 12 through an air outlet 7 after being purified, is conveyed to an air supply pipe 13 through the telescopic hose 12, is conveyed to a flow divider 14 through the air supply pipe 13, and is further conveyed to four elastic hoses 15 through the flow divider 14 respectively, and is conveyed to the breathing mask 18 for a user through the elastic hoses 15, when the oxygen-enriched dirt separation device and the dirt separation method are used, the worker can push the flow divider 14 to drive a pulley 10 to slide in the suspension slide rail 8 through a platform 9 at the top, so that the position can be moved, when the flow divider 14 is far away from a corresponding air outlet 7, the telescopic hose 12 is extended so that the length supply is realized, when the flow divider 14 is close to the air outlet 7, the telescopic hose 12 is contracted so that the use is avoided from being influenced by the length, and when the position of the worker is moved, the worker, the flow divider 14 is rotated at the end of the air supply pipe 13, so that the position is effectively avoided from being wound and the elastic hose 15 is blocked.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
Claims (9)
1. The utility model provides a plateau tunnel construction separates dirty device with oxygen boosting which characterized in that: comprises an oxygen-enriched dirt-isolating processor, a tail end hose transmission and distribution system and a top free sliding system;
the top free sliding system comprises a hanging slide rail (8) arranged at the upper part of the tunnel trolley through a fixing part, a pulley (10) connected to the inner wall of the hanging slide rail (8) in a sliding way, and a barrier (11) fixedly connected to the two ends of the hanging slide rail (8) and used for limiting the pulley (10) to be separated from the hanging slide rail (8);
terminal transmission and distribution system includes platform (9) fixed connection in pulley (8) top, the lower fixed surface of platform (9) is connected with air supply pipe (13), the one end joint of air supply pipe (13) has shunt (14) that are used for shunting the air, one side intercommunication of air supply pipe (13) is provided with scalable hose (12), shunt (14) cooperate with the oxygen boosting dirt separation treater through scalable hose (12), the outer wall intercommunication of shunt (14) is provided with four sets of transmission and distribution subassemblies.
2. The oxygen-enriched dirt-isolating device for plateau tunnel construction as claimed in claim 1, wherein the splitter (14) is hemispherical and has an air storage cavity formed therein for dispersing air, the bottom of the air supply pipe (13) is fixedly connected with a clamping protrusion (17), and the splitter (14) is clamped on the outer wall of the clamping protrusion (17).
3. An oxygen-enriched dirt-isolating device for plateau tunnel construction as claimed in claim 2, wherein the diverter (14) can rotate 360 degrees relative to the clamping protrusion (17) on the outer wall of the clamping protrusion (17), and a rubber ring (16) for forming a sealing structure is arranged at the connection part of the diverter (14) and the air supply pipe (13).
4. The oxygen-enriched dirt-isolating device for plateau tunnel construction as claimed in claim 1, wherein the transmission and distribution assembly comprises four sets of elastic hoses (15) fixedly connected to the outer wall of the diverter (14) and communicated with the diverter (14), one end of each elastic hose (15) is communicated with a breathing mask (18), and flexible silica gel strips are bonded to the edges of the breathing mask (18).
5. The oxygen-enriched dirt-separating device for plateau tunnel construction is characterized in that the oxygen-enriched dirt-separating processor comprises a shell (1), an air filter (2), a hydrogen absorption machine (3), an oxygen generator (4) and a storage battery (5) are sequentially arranged on the inner bottom wall of the shell (1) from left to right, a display screen (6) is arranged on the front face of the shell (1), and the storage battery (5) is used for providing a power supply for the display screen (6), the air filter (2), the hydrogen absorption machine (3) and the oxygen generator (4).
6. An oxygen-enriched and dirt-isolating device for plateau tunnel construction as claimed in claim 5, wherein one side of the housing (1) is provided with an air inlet (19), both sides of the upper surface of the housing (1) are provided with air outlets (7), and the two air outlets (7) are communicated with each other through a pipeline.
7. An oxygen-enriched dirt-isolating device for plateau tunnel construction as claimed in claim 6, wherein an access door (20) is slidably connected to the middle of the back of the housing (1).
8. The oxygen-enriched sewage insulation device for plateau tunnel construction as claimed in claim 1, wherein the inner side wall of the air inlet (19) is fixedly connected with a coarse screen filter screen plate and a fine screen filter screen plate respectively, and the coarse screen filter screen plate is located at the outer side of the air inlet (19).
9. A method for separating pollution in plateau tunnel construction comprises the oxygen-enriched pollution-separating device for plateau tunnel construction as claimed in any one of claims 1 to 8, and is characterized by further comprising the following operation steps:
s1, air compression and filtration: air enters an air compressor through a primary filter screen and a middle filter screen and is conveyed to an air filter by the air compressor;
s2, air adsorption and impurity removal: air is conveyed to an air storage tank after passing through an air filter, and then enters an activated carbon adsorbent after being dried;
s3, mixing air: the adsorbed air is divided into two paths, one path of the air passes through a PSA adsorption tower to prepare air with the oxygen concentration of more than 35 percent, the other path of the air does not undergo any treatment, and the two paths of the air are mixed according to the oxygen concentration measured by a program controller;
s4, controlling the hydrogen content: controlling the hydrogenation flow by a hydrogen absorption machine to ensure that the concentration of the mixed hydrogen is lower than 2 percent;
s5, air sterilization: the sterilizer performs sterilization and filtration on the mixed air;
s6, air supply: and conveying the filtered hydrogen to a tail end hose conveying and distributing system for use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426386.3A CN115614884A (en) | 2022-11-14 | 2022-11-14 | Oxygen-enriched dirt-isolating device and dirt-isolating method for plateau tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426386.3A CN115614884A (en) | 2022-11-14 | 2022-11-14 | Oxygen-enriched dirt-isolating device and dirt-isolating method for plateau tunnel construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117345317A (en) * | 2023-10-25 | 2024-01-05 | 中交一公局集团有限公司 | High-efficiency oxygen supply ventilation system based on high-altitude tunnel construction and use method |
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2022
- 2022-11-14 CN CN202211426386.3A patent/CN115614884A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117345317A (en) * | 2023-10-25 | 2024-01-05 | 中交一公局集团有限公司 | High-efficiency oxygen supply ventilation system based on high-altitude tunnel construction and use method |
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