CN110159334B - Tunnel working face dirty wind cyclic utilization device - Google Patents
Tunnel working face dirty wind cyclic utilization device Download PDFInfo
- Publication number
- CN110159334B CN110159334B CN201910521145.9A CN201910521145A CN110159334B CN 110159334 B CN110159334 B CN 110159334B CN 201910521145 A CN201910521145 A CN 201910521145A CN 110159334 B CN110159334 B CN 110159334B
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- Prior art keywords
- pipe
- assembly
- dust removal
- curved
- filter
- Prior art date
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- 125000004122 cyclic group Chemical group 0.000 title description 2
- 239000000428 dust Substances 0.000 claims abstract description 65
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
- 239000001301 oxygen Substances 0.000 claims abstract description 41
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010865 sewage Substances 0.000 claims abstract description 17
- 238000004064 recycling Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims description 28
- 239000007921 spray Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
Abstract
The invention discloses a tunnel working face sewage and air recycling device which comprises a purifying box body, an air inlet pipe and an air outlet pipe which are respectively communicated with two sides of the purifying box body, and a dust removing and humidifying mechanism and an oxygen supplying mechanism which are arranged in the purifying box body, wherein the dust removing and humidifying mechanism is communicated with the oxygen supplying mechanism; the device not only forms a ventilation circulation system and realizes the secondary circulation utilization of the polluted air, but also forms a water circulation system, plays a role in humidifying the air in the device, increases the gas humidity and the oxygen concentration, saves energy, reduces emission and is environment-friendly.
Description
Technical Field
The invention relates to the technical field of tunnel construction ventilation equipment, in particular to a sewage wind recycling device for a tunnel working face.
Background
Tunnel excavation is often performed by means of a drill burst, which will necessarily generate a large amount of dust. The high concentration of dust not only affects the health of the workers, but also can adversely affect subsequent construction operations. At present, a pressing-in ventilation mode is adopted for ventilation of tunnels, and dust generated by a face and a tunnel body is taken out of the tunnels. However, the dust near the tunnel portal is inevitably diffused to pollute the surrounding environment, and especially when the tunnel is near a residential area, the dust generated by construction easily causes contradiction between residents and construction units, and the construction progress is influenced.
Disclosure of Invention
The invention aims to provide a sewage wind recycling device for a tunnel working face, which aims to solve the problem that the ventilation of the existing tunnel has great influence on the environment.
The technical scheme for solving the technical problems is as follows: the device comprises a purifying box body, an air inlet pipe and an air outlet pipe which are respectively communicated with two sides of the purifying box body, and a dust removing and humidifying mechanism and an oxygen supplying mechanism which are arranged in the purifying box body, wherein the dust removing and humidifying mechanism is communicated with the oxygen supplying mechanism;
the dust removal and humidification mechanism comprises a dust removal component connected with the air inlet pipe, a humidification component connected with the upper end of the dust removal component and a filter component connected with the lower end of the dust removal component, and the filter component is communicated with the humidification component through a backflow component;
the oxygen supply mechanism comprises a sealing tank with an oxygen inlet and a stirring assembly which is connected in the sealing tank in a matching way, and the exhaust pipe is connected with the sealing tank.
Further, the dust removal assembly comprises a dust removal pipe and a dust removal filter plate positioned in the dust removal pipe, and two ends of the dust removal pipe are respectively communicated with the air inlet pipe and the sealing tank.
Further, the dust removal pipe includes a plurality of first curved pipes and second curved pipes that connect gradually, the bottom of first curved pipe with filtering component is connected, the top of second curved pipe with humidifying component is connected.
Further, the first curved pipe and the second curved pipe are provided with hoops at the connection positions, and fixing pieces are arranged at the two ends of each hoop.
Further, the humidification assembly comprises a spray pipe communicated with the backflow assembly and spray heads distributed on the spray pipe, the spray heads penetrate through the top ends of the second curved pipes, and sealing gaskets are arranged between the spray heads and the top ends of the second curved pipes.
Further, the return assembly comprises a return pipe connected with the filter assembly and a water suction pump connected to the return pipe, and the end of the return pipe away from the filter assembly is communicated with the water spray pipe.
Further, the filter component comprises a filter tank, a water collecting tank connected to the bottom end of the filter tank, and a gravel layer, an activated carbon layer and a filter membrane layer which are sequentially arranged in the filter tank, wherein a drain pipe between the filter tank and the bottom end of the first curved pipe and a drain valve connected to the joint position of the drain pipe and the first curved pipe are connected, and the return pipe is communicated with the water collecting tank.
Further, the stirring assembly comprises a driving motor arranged on the sealing tank, a stirring shaft connected to the output end of the driving motor and positioned in the sealing tank, and stirring blades connected to the stirring shaft.
Further, a transverse partition plate and a vertical partition plate which is vertically intersected with the transverse partition plate are arranged in the purifying box body, the purifying box body is divided into a spraying cavity, a purifying cavity, a filtering cavity and an oxygen mixing cavity which are sequentially connected through the transverse partition plate and the vertical partition plate, the humidifying component is located in the spraying cavity, the dust removing component is located in the purifying cavity, and the filtering component is located in the filtering cavity; the oxygen supply mechanism is positioned in the oxygen mixing cavity.
Further, a catalytic box is arranged between the dust removal pipe and the sealing tank, and a catalyst is filled in the catalytic box.
The invention has the following beneficial effects: according to the tunnel working face sewage wind recycling device provided by the invention, a ventilation circulating system is formed by the air inlet pipe, the dust removing component, the oxygen supplying component and the exhaust pipe, so that secondary recycling of sewage wind is realized, impurities in the sewage wind are removed by the dust removing component, and the oxygen is mixed with the removed gas by the oxygen supplying component, so that the oxygen concentration in the air is increased, sufficient oxygen is guaranteed to flow back into a tunnel, the air quality of the working face is improved, and the tunnel working face sewage wind recycling device is energy-saving and environment-friendly; form water circulation system through humidification subassembly, filter component and backward flow subassembly, wherein, not only realized the dust fall to tiny particle impurity in the dirty wind in the dust removal subassembly through humidification subassembly's spraying, the gaseous humidification effect that plays again, increase gaseous humidity, remove miscellaneous processing through filter component to the water that contains impurity, the solid particle impurity of the water in the removal backward flow humidification subassembly.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of the structure of the dust removing and humidifying mechanism and the oxygen supplying mechanism in the invention;
FIG. 3 is a schematic view of a dust removing pipe structure in the present invention;
FIG. 4 is a schematic view of a connection of a first curved tube and a second curved tube according to the present invention;
FIG. 5 is a schematic diagram of the structure of the purifying box body in the invention;
the reference numerals shown in fig. 1 to 5 are respectively expressed as: the device comprises a 1-purifying box body, a 2-air inlet pipe, a 3-exhaust pipe, a 5-oxygen supply mechanism, a 40-dedusting component, a 41-humidifying component, a 42-filtering component, a 43-reflux component, a 50-oxygen inlet, a 51-sealing tank, a 52-stirring component, a 401-dedusting pipe, a 402-dedusting filter plate, a 403-first curved pipe, a 404-second curved pipe, a 405-hoop, a 406-fixing piece, a 410-spray pipe, a 411-spray nozzle, a 430-reflux pipe, a 431-water suction pump, a 420-filtering box, a 421-water collecting box, a 422-gravel layer, a 423-activated carbon layer, a 424-filtering membrane layer, a 425-drain pipe, a 426-drain valve, a 520-driving motor, a 521-stirring shaft and 522-stirring blades.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1 to 2, the tunnel working face sewage wind recycling device comprises a purifying box body 1, an air inlet pipe 2 and an air outlet pipe 3 which are respectively communicated with two sides of the purifying box body 1, and a dust removing and humidifying mechanism and an oxygen supplying mechanism 5 which are arranged inside the purifying box body 1, wherein the dust removing and humidifying mechanism is communicated with the oxygen supplying mechanism 5. The purifying box body 1 is of a sealing structure, so that the tightness of gas entering the purifying box body 1 is guaranteed, and gas leakage is placed. The air in the tunnel is pressed into the air inlet pipe 2 under the action of the fan, is conveyed to the dust removal and humidification mechanism through the air inlet pipe 2, is subjected to dust removal and humidification treatment in the dust removal and humidification mechanism, and the treated cavity enters the oxygen supply mechanism 5, wherein oxygen is conveyed into the oxygen supply mechanism 5 through oxygen supply equipment (such as an oxygen bottle and the like) and is mixed with air so that the air has a certain oxygen concentration, and is discharged back into the tunnel through the exhaust pipe 3 to form a complete purification and circulation system, so that the secondary recycling of the polluted air in the tunnel is realized, the air quality of the working face of the tunnel is improved, and the air conditioner is energy-saving and environment-friendly.
The dedusting and humidifying mechanism comprises a dedusting assembly 40 connected with the air inlet pipe 2, a humidifying assembly 41 connected to the upper end of the dedusting assembly 40 and a filtering assembly 42 connected to the lower end of the dedusting assembly 40, wherein the filtering assembly 42 is communicated with the humidifying assembly 41 through a backflow assembly 43; the dust removing assembly 40 comprises a dust removing pipe 401 and a dust removing filter plate 402 positioned in the dust removing pipe 401, and two ends of the dust removing pipe 401 are respectively communicated with the air inlet pipe 2 and the sealing tank 51. The dirty wind enters into the dust removal pipe 401, blocks the filtration with the solid particle that mixes in the dirty wind under the dust removal filter plate 402 effect in the dust removal pipe 401 to spray water smoke through the spray pipe 410 of humidification subassembly 41 and the shower nozzle 411 that distributes on the spray pipe 410 in to the dust removal pipe 401, make the solid particle subside, and flow into in the filter unit 42 through the bottom of dust removal pipe 401, both realized the filtration dust fall to the dirty wind and realized the water smoke dust fall to the dirty wind, and play the humidification effect to the dirty wind through the water smoke that shower nozzle 411 sprayed, guarantee that the air that enters into in the oxygen suppliment mechanism 5 has certain humidity. The water body flowing into the filter assembly 42 filters the mixed solid impurities in the water body under the filtering action of the filter assembly 42, and then the water body is supplied to the spray pipe 410 again through the backflow assembly 43 for humidification test, so that a water body circulation purification use system is formed, energy conservation and environmental protection are realized, the blockage of the spray pipe 410 and the spray nozzle 411 by the impurities in the water is avoided, the service life of the spray nozzle 411 is prolonged, the spray nozzle 411 adopts a spiral nozzle, the spiral nozzle is a solid conical or hollow conical spray nozzle, a clear runner is provided, the liquid blockage can be reduced to the greatest extent, the liquid reaches the maximum flow on a pipeline with a given size, and the spray effect is improved. The backflow component 43 comprises a backflow pipe 430 and a water suction pump 431 connected to the backflow pipe 430, and under the driving action of the water suction pump 431, the water suction pump 431 is driven to drive the water filtered by the filtering component 42 to be pumped into the water spraying pipe 410, so that the water spraying pipe is reliable and stable to use.
The oxygen supply mechanism 5 comprises a sealed tank 51 with an oxygen inlet 50 and a stirring assembly 52 which is matched and connected in the sealed tank 51, and the exhaust pipe 3 is connected with the sealed tank 51. The sealed tank 51 is a closed container, and the purified air and oxygen entering the sealed tank 51 are mixed by the stirring assembly 52, so that the mixing effect is improved. Wherein, the stirring assembly 52 comprises a driving motor 520 arranged on the sealed pot 51, a stirring shaft 521 connected to the output end of the driving motor 520 and positioned in the sealed pot 51, and a stirring blade 522 connected to the stirring shaft 521. The stirring vane 522 includes a stirring rod connected to the stirring shaft 521, a vertical vane connected to the stirring rod, and a lateral vane connected to the vertical vane. The driving motor 520 drives the rotating shaft to rotate, and then drives the stirring blade 522 to stir in the sealed tank 51, so that air and oxygen in the sealed tank 51 are fully mixed.
In order to improve the dust removing effect, as shown in fig. 3, in the present invention, the dust removing tube 401 includes a plurality of first curved tubes 403 and second curved tubes 404 connected in sequence, the bottom end of the first curved tube 403 is connected to the filter assembly 42, and the top end of the second curved tube 404 is connected to the humidifying assembly 41. The first curved pipe 403 and the second curved pipe 404 are all in a U-shaped structure, and the whole body of the first curved pipe 403 and the second curved pipe 404 after being connected is in an S-shaped structure, which is beneficial to prolonging the acting time of the sewage wind in the dust removal pipe 401 and further improving the dust removal effect. As shown in fig. 4, the first curved tube 403 and the second curved tube 404 are connected and fixed by a hoop 405 and fixing members 406 connected to two ends of the hoop 405, where the hoop is disposed on an outer wall of a joint between the first curved tube 403 and the second curved tube 404, and the fixing members 406 are bolts. The dust removal filter plate sets up the inner wall department at first curved pipe 403 and the junction of second curved pipe 404, when the staple bolt was dismantled, can wash the dust removal filter plate, convenient and reliable, safe and efficient. The first curved pipe 403 and the second curved pipe 404 are of a U-shaped pipe structure with opposite vertexes, namely, the vertexes of the first curved pipe 403 are downward, the vertexes of the second curved pipe 404 are upward, the spray nozzle 411 penetrates through the top end of the second curved pipe 404, a sealing gasket is arranged between the spray nozzle 411 and the top end of the second curved pipe 404, sealing performance between the spray nozzle 411 and the second curved pipe is guaranteed, solid particles in the polluted air are settled by water mist sprayed by the spray nozzle 411, and the solid particles are settled on the inner walls of the dedusting filter plate 402 and the curved pipe, so that the solid particles flow into the first curved pipe 403 to realize the discharge of sewage.
In order to facilitate the filtration of the sewage in the dust removal pipe 401, in the present invention, the filtering assembly 42 comprises a filtering tank 420, a water collection tank 421 connected to the bottom end of the filtering tank 420, a gravel layer 422, an activated carbon layer 423 and a filtering membrane layer 424 sequentially arranged in the filtering tank 420, a drain pipe 425 between the filtering tank 420 and the bottom end of the first curved pipe 403, and a drain valve 426 connected to the position where the drain pipe 425 and the first curved pipe 403 are connected, and the return pipe 430 is communicated with the water collection tank 421. When drain valve 426 is open, communication is established between first curved tube 403 and drain pipe 425, and when drain valve 426 is closed, disconnection is established between first curved tube 403 and drain pipe 425. When the filter box is used, the drain valve 426 is opened at regular time, so that sewage flows into the filter box 420 to be filtered, the gravel layer 422, the activated carbon layer 423 and the filter membrane layer 424 in the filter box 420 are used for sequentially carrying out coarse filtration, adsorption and fine filtration on the sewage, no solid impurities in filtered water are ensured, and therefore the water conveyed to the humidifying assembly 41 is ensured not to block the water spraying pipe 410, and the service performance is improved.
As shown in fig. 5, a transverse partition board 10 and a vertical partition board 11 which is perpendicular to the transverse partition board 10 are arranged in the purifying box body 1, the purifying box body 1 is divided into a spraying cavity 12, a purifying cavity 13, a filtering cavity 14 and an oxygen mixing cavity 15 which are sequentially connected through the transverse partition board 10 and the vertical partition board 11, the humidifying component 41 is positioned in the spraying cavity 12, the dust removing component 40 is positioned in the purifying cavity 13, and the filtering component 42 is positioned in the filtering cavity 14; the oxygen supply mechanism 5 is positioned in the oxygen mixing cavity 16.
In order to facilitate the treatment of toxic gases such as CO mixed in the polluted air, in the present invention, a catalytic box 60 is disposed between the dust removal pipe 401 and the seal pot 51, and the catalytic box 60 is filled with a catalyst. The catalyst may be a CuO catalyst or a CuO catalyst.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The device for recycling the sewage and air on the tunnel working surface is characterized by comprising a purifying box body (1), an air inlet pipe (2) and an air outlet pipe (3) which are respectively communicated with two sides of the purifying box body (1), and a dedusting and humidifying mechanism and an oxygen supply mechanism (5) which are arranged in the purifying box body (1), wherein the dedusting and humidifying mechanism is communicated with the oxygen supply mechanism (5);
the dust removal and humidification mechanism comprises a dust removal assembly (40) connected with the air inlet pipe (2), a humidification assembly (41) connected to the upper end of the dust removal assembly (40) and a filter assembly (42) connected to the lower end of the dust removal assembly (40), and the filter assembly (42) is communicated with the humidification assembly (41) through a backflow assembly (43);
the oxygen supply mechanism (5) comprises a sealing tank (51) with an oxygen inlet (50) and a stirring assembly (52) which is matched and connected in the sealing tank (51), and the exhaust pipe (3) is connected with the sealing tank (51);
the dust removal assembly (40) comprises a dust removal pipe (401) and a dust removal filter plate (402) positioned in the dust removal pipe (401), and two ends of the dust removal pipe (401) are respectively communicated with the air inlet pipe (2) and the sealing tank (51);
the dust removal pipe (401) comprises a plurality of first curved pipes (403) and second curved pipes (404) which are sequentially connected, the bottom ends of the first curved pipes (403) are connected with the filter assembly (42), and the top ends of the second curved pipes (404) are connected with the humidifying assembly (41);
a hoop (405) is arranged at the connecting position of the first curved pipe (403) and the second curved pipe (404), and fixing pieces (406) are arranged at two ends of the hoop (405);
the humidifying component (41) comprises a water spraying pipe (410) communicated with the backflow component (43) and spray heads (411) distributed on the water spraying pipe (410), the spray heads (411) penetrate through the top end of the second curved pipe (404), and a sealing gasket is arranged between the spray heads (411) and the top end of the second curved pipe (404);
the reflux assembly (43) comprises a reflux pipe (430) connected with the filter assembly (42) and a water suction pump (431) connected on the reflux pipe (430), and the end of the reflux pipe (430) away from the filter assembly (42) is communicated with the water spray pipe (410);
the filter assembly (42) comprises a filter box (420), a water collecting tank (421) connected to the bottom end of the filter box (420) and a gravel layer (422), an activated carbon layer (423) and a filter membrane layer (424) which are sequentially arranged in the filter box (420), a drain pipe (425) is arranged between the filter box (420) and the bottom end of the first curved pipe (403), a drain valve (426) is arranged at the joint position of the drain pipe (425) and the first curved pipe (403), and a return pipe (430) is communicated with the water collecting tank (421).
2. The tunnel working face sewage recycling apparatus according to claim 1, wherein the stirring assembly (52) comprises a driving motor (520) arranged on a sealing tank (51), a stirring shaft (521) connected to an output end of the driving motor (520) and positioned in the sealing tank (51), and a stirring blade (522) connected to the stirring shaft (521).
3. The tunnel working face sewage recycling device according to claim 2, wherein a transverse partition plate (10) and a vertical partition plate (11) which is perpendicular to the transverse partition plate (10) are arranged in the purifying box body (1), the purifying box body (1) is divided into a spraying cavity (12), a purifying cavity (13), a filtering cavity (14) and an oxygen mixing cavity (15) which are sequentially connected through the transverse partition plate (10) and the vertical partition plate (11), the humidifying component (41) is positioned in the spraying cavity (12), the dust removing component (40) is positioned in the purifying cavity (13), and the filtering component (42) is positioned in the filtering cavity (14); the oxygen supply mechanism (5) is positioned in the oxygen mixing cavity (15).
4. A tunnel working face sewage wind recycling device according to claim 3, characterized in that a catalytic box (60) is arranged between the dust removal pipe (401) and the sealing tank (51), and the catalytic box (60) is filled with a catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910521145.9A CN110159334B (en) | 2019-06-17 | 2019-06-17 | Tunnel working face dirty wind cyclic utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910521145.9A CN110159334B (en) | 2019-06-17 | 2019-06-17 | Tunnel working face dirty wind cyclic utilization device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110159334A CN110159334A (en) | 2019-08-23 |
| CN110159334B true CN110159334B (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910521145.9A Active CN110159334B (en) | 2019-06-17 | 2019-06-17 | Tunnel working face dirty wind cyclic utilization device |
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| CN (1) | CN110159334B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696220B (en) * | 2020-12-25 | 2023-05-12 | 东莞鹏驰智能设备科技有限公司 | Explosion-proof safe type air circulation system suitable for traffic tunnel |
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