CN111577371A - Device and method for mine damp-heat treatment - Google Patents
Device and method for mine damp-heat treatment Download PDFInfo
- Publication number
- CN111577371A CN111577371A CN202010436430.3A CN202010436430A CN111577371A CN 111577371 A CN111577371 A CN 111577371A CN 202010436430 A CN202010436430 A CN 202010436430A CN 111577371 A CN111577371 A CN 111577371A
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- cooling
- box
- air
- dehumidification
- mine
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 title claims description 13
- 238000001816 cooling Methods 0.000 claims abstract description 97
- 238000007791 dehumidification Methods 0.000 claims abstract description 41
- 238000001914 filtration Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 20
- 239000012535 impurity Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005067 remediation Methods 0.000 claims 4
- 238000007792 addition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Drying Of Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a device and a method for mine damp and hot treatment, wherein the device comprises a filtering device and a dehumidifying and cooling device, the filtering device comprises an air filtering box, and a filter screen is arranged in the air filtering box; the right end of the inner cavity of the air filter box is connected with a dehumidifying and cooling device through a vent pipe; the dehumidifying and cooling device comprises a dehumidifying and cooling box, a base and a water tank; a refrigerating machine is fixedly arranged above the dehumidification cooling box, and the lower end of the refrigerating machine is connected with two cooling coils; the working method of the device for mine damp and hot treatment is that the dehumidification and cooling of the air in the mine are completed through a plurality of steps; the device for mine damp and hot treatment cleans the filter screen through the rotation of the brush, and the filter screen can vibrate when the brush cleans the filter screen through the spring arranged in the mounting groove, so that the cleaning effect is better, and the device can be ensured to normally ventilate for a long time; the two cooling coil pipes in the dehumidification cooling box are arranged, so that the dehumidification cooling area is increased, and the dehumidification cooling effect is better.
Description
Technical Field
The invention relates to a device and a method, in particular to a device and a method for mine damp and hot treatment.
Background
At present, the depth of mines in China is below kilometers, the temperature in deeper mines is high, air is humid, the working environment of workers is poor, and the normal work of the workers is affected, so that damp and hot treatment needs to be carried out in the mines to ensure the normal work of the workers.
The damp-heat treatment of the mine is realized by cooling and ventilating the mine, and fine particles in the air are firstly filtered and removed during the damp-heat treatment. The existing mine damp-heat treatment device is inconvenient to replace a filter screen, and the filter screen is blocked after long-time use, so that normal ventilation work cannot be carried out; secondly, the existing damp-heat treatment device cannot enlarge the dehumidifying and cooling area, the dehumidifying and cooling effect is poor, and if the number of the damp-heat treatment devices is increased, more funds need to be consumed.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a device and a method for mine damp-heat treatment.
In order to solve the technical problems, the invention adopts the technical scheme that: a device for mine damp and hot treatment comprises a filtering device and a dehumidifying and cooling device, wherein the filtering device is connected with the dehumidifying and cooling device in front and back;
the filter device comprises an air filter box, wherein three filter screens are vertically arranged in the air filter box, and the three filter screens are arranged at equal intervals;
the upper end of the air filter box is fixedly provided with a transmission box, and a belt transmission device is arranged in the transmission box; the belt transmission device comprises a motor, a driving wheel and a driven wheel, the motor is fixedly arranged in the transmission box, the motor is fixedly connected with the driving wheel, and the driving wheel is connected with the driven wheel through a transmission belt;
the centers of the driving wheel and the driven wheel are respectively connected with a rotating shaft, a hairbrush is fixedly arranged on the rotating shaft, and the hairbrush is positioned between two adjacent filter screens;
the left end of the inner cavity of the air filter box is connected with a first fan, and the right end of the inner cavity of the air filter box is connected with a dehumidification cooling device through a vent pipe;
the dehumidification cooling device comprises a dehumidification cooling box, a base and a water tank, wherein the dehumidification cooling box is arranged above the base, and the water tank is detachably arranged between the dehumidification cooling box and the base; a refrigerating machine is fixedly arranged above the dehumidification cooling box, the lower end of the refrigerating machine is connected with two cooling coils, the cooling coils are positioned in an inner cavity of the dehumidification cooling box, an annular plate is vertically arranged between the two cooling coils, and the annular plate is fixed in the dehumidification cooling box;
a funnel is arranged below the cooling coil, penetrates through the lower end of the dehumidification and cooling box and communicates the inner cavity of the dehumidification and cooling box with the water tank;
the left end of the inner cavity of the dehumidification cooling box is communicated with the inner cavity of the air filter box through a vent pipe, and the right end of the inner cavity of the dehumidification cooling box is connected with a second fan.
Furthermore, the periphery of the filter screen is provided with a mounting frame, the outer side of the upper end and the outer side of the lower end of the mounting frame are respectively provided with a mounting groove, and the mounting frame is movably arranged on the inner side of the mounting groove; a plurality of through holes are formed in the mounting groove located on the outer side of the lower end of the mounting frame.
And furthermore, the upper end and the lower end of the mounting frame are respectively connected with the mounting grooves at corresponding positions through springs.
Furthermore, a dust collecting box is detachably arranged at the lower end of the air filter box; the box body of the air filter box below the filter screen is provided with a dust exhaust port corresponding to the position.
Furthermore, a plurality of through holes are formed in the annular plate.
The working method of the device for mine damp-heat treatment comprises the following steps:
when the damp and hot treatment of the environment in the mine is needed, starting a first fan, a second fan and a refrigerator, wherein the first fan and the second fan rotate in the same direction; the first fan rotates to convey damp and hot air in the mine into the filtering device, and the damp and hot air passes through the three filter screens to filter tiny particles in the damp and hot air; when more impurities and dust on the filter screen need to be cleaned, the motor is started to drive the rotating shaft to rotate through the rotation of the driving wheel and the driven wheel, so that the brush is driven to rotate to clean the filter screen, and the upper end and the lower end of the filter screen are respectively connected with the mounting groove through the spring, so that when the brush touches the filter screen, the filter screen can vibrate, and the cleaning effect of the filter screen is better; the dust cleaned on the filter screen enters the detachable dust collection box through the dust discharge port to be collected;
the filtered damp and hot air enters the dehumidifying and cooling box through the vent pipe; the hot and humid air entering the dehumidification and cooling box is in contact with the cooling coil on the left side and then is liquefied in a cooling manner, and then is in contact with the cooling coil on the right side through the annular plate and is liquefied in a cooling manner, so that the dehumidification and cooling of the hot and humid air are realized; and the dehumidified and cooled air is discharged under the action of the second fan, so that damp and hot treatment of the air in the mine is realized.
The device for mine damp and hot treatment cleans the filter screen through the rotation of the brush, and the spring arranged in the mounting groove enables the filter screen to vibrate when the brush cleans the filter screen, so that the cleaning effect is better, and the device can be ensured to normally ventilate for a long time; the two cooling coil pipes in the dehumidification cooling box are arranged, so that the dehumidification cooling area is increased, and the dehumidification cooling effect is better.
Drawings
Fig. 1 is a schematic structural diagram of the device for mine damp-heat treatment in the invention.
Fig. 2 is a partially enlarged view of the mounting groove at the upper end of the filter net in fig. 1.
Fig. 3 is a schematic view of a position relationship between the mounting frame and the filter screen.
In the figure: 1. an air filtration tank; 2. a transmission case; 3. a dust collection box; 4. a filter screen; 5. a motor; 6. a driving wheel; 7. a driven wheel; 8. a transmission belt; 9. a dust exhaust port; 10. installing a frame; 11. a rotating shaft; 12. a brush; 13. a first fan; 14. a second fan; 15. a breather pipe; 16. a dehumidification cooling box; 17. a refrigerator; 18. a cooling coil; 19. an annular plate; 20. a water tank; 21. a base; 22. a funnel; 23. mounting grooves; 24. a spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a device for mine damp-heat treatment comprises a filtering device and a dehumidifying and cooling device, wherein the filtering device is connected with the dehumidifying and cooling device in front and back;
the filtering device comprises an air filtering box 1, wherein three filtering nets 4 are vertically arranged in the air filtering box 1, and the three filtering nets are arranged at equal intervals; the arrangement of the three filter screens enhances the filtering effect on the air passing through the air filtering box.
The upper end of the air filtering box 1 is fixedly provided with a transmission box 2, and a belt transmission device is arranged in the transmission box 2; the belt transmission device comprises a motor 5, a driving wheel 6 and a driven wheel 7, the motor 5 is fixedly arranged in the transmission case 2, the motor 5 is fixedly connected with the driving wheel 6, and the driving wheel 6 is connected with the driven wheel 7 through a transmission belt 8;
the centers of the driving wheel 6 and the driven wheel 7 are respectively connected with a rotating shaft 11, a brush 12 is fixedly arranged on the rotating shaft 11, and the brush 12 is positioned between two adjacent filter screens;
the left end of the inner cavity of the air filter box 1 is connected with a first fan 13, and the right end of the inner cavity of the air filter box 1 is connected with a dehumidifying and cooling device through a vent pipe 15;
the dehumidifying and cooling device comprises a dehumidifying and cooling box 16, a base 21 and a water tank 20, wherein the dehumidifying and cooling box 16 is arranged above the base 21, and the water tank 20 is detachably arranged between the dehumidifying and cooling box 16 and the base 21; a refrigerator 17 is fixedly arranged above the dehumidification cooling box 16, the lower end of the refrigerator 17 is connected with two cooling coils 18, the cooling coils are positioned in the inner cavity of the dehumidification cooling box 16, an annular plate 19 is vertically arranged between the two cooling coils, and the annular plate 19 is fixed in the dehumidification cooling box 16;
a funnel 22 is arranged below the cooling coil, the funnel 22 is arranged at the lower end of the dehumidification cooling box 16 in a penetrating way, and the inner cavity of the dehumidification cooling box 16 is communicated with the water tank 20 through the funnel 22;
the left end of the inner cavity of the dehumidifying and cooling box 16 is communicated with the inner cavity of the air filtering box 1 through a vent pipe 15, and the right end of the inner cavity of the dehumidifying and cooling box 16 is connected with a second fan 14.
As shown in fig. 3, the periphery of the filter screen 4 is provided with mounting frames 10, the outer sides of the upper end and the lower end of the mounting frames 10 are respectively provided with mounting grooves 23, and the mounting frames 10 are movably arranged inside the mounting grooves 23; a plurality of through holes are arranged on the mounting groove positioned on the outer side of the lower end of the mounting frame 10.
As shown in fig. 2, the upper end and the lower end of the mounting frame 10 are respectively connected to the mounting grooves at corresponding positions through springs 24.
The lower end of the air filter box 1 is detachably provided with a dust collection box 3; the box body of the air filter box 1 below the filter screen 4 is provided with a dust exhaust port 9 with a corresponding position.
The annular plate 19 is provided with a plurality of through holes, and the damp and hot air passes through the annular plate from the through holes on the annular plate, so that the flowing speed of the air in the dehumidification and cooling box is reduced, and the damp and hot air can be effectively dehumidified and cooled.
The working method of the device for mine damp-heat treatment comprises the following steps:
when the damp and hot treatment of the environment in the mine is needed, the first fan 13, the second fan 14 and the refrigerator 17 are started, and the first fan 13 and the second fan 14 rotate in the same direction; the first fan 13 rotates to convey damp and hot air in the mine into the filtering device, and the damp and hot air passes through the three filter screens to filter tiny particles in the damp and hot air; when more impurities and dust on the filter screen 4 need to be cleaned, the motor 5 is started to rotate through the driving wheel 6 and the driven wheel 7 to drive the rotating shaft 11 to rotate, so as to drive the brush 12 to rotate to clean the filter screen, and the upper end and the lower end of the filter screen are respectively connected with the mounting groove through the springs, so that when the brush touches the filter screen 4, the filter screen 4 can vibrate, and the cleaning effect of the filter screen is better; the dust cleaned on the filter screen enters the detachable dust collection box 3 through the dust discharge port 9 for collection;
the filtered damp and hot air enters the dehumidifying and cooling box 16 through the vent pipe 15; the hot and humid air entering the dehumidification cooling box 16 contacts with the cooling coil 18 on the left side and then is liquefied in a cooling manner, and then contacts with the cooling coil on the right side through the annular plate and is liquefied in a cooling manner, so that the dehumidification and cooling of the hot and humid air are realized; the dehumidified and cooled air is discharged under the action of the second fan 14, and the damp and hot treatment of the air in the mine is realized. The water liquefied after contact with the cooling coil flows into the water tank 20 therebelow through the funnel 22 and is collected.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (6)
1. A device for mine damp and hot treatment is characterized in that: comprises a filtering device and a dehumidifying and cooling device, wherein the filtering device is connected with the dehumidifying and cooling device in front and back;
the filter device comprises an air filter box (1), wherein three filter screens (4) are vertically arranged in the air filter box (1), and the three filter screens (4) are arranged at equal intervals;
the upper end of the air filtering box (1) is fixedly provided with a transmission box (2), and a belt transmission device is arranged in the transmission box (2); the belt transmission device comprises a motor (5), a driving wheel (6) and a driven wheel (7), the motor (5) is fixedly arranged in the transmission box (2), the motor (5) is fixedly connected with the driving wheel (6), and the driving wheel (6) is connected with the driven wheel (7) through a transmission belt (8);
the centers of the driving wheel (6) and the driven wheel (7) are respectively connected with a rotating shaft (11), a brush (12) is fixedly arranged on the rotating shaft (11), and the brush (12) is positioned between two adjacent filter screens;
the left end of the inner cavity of the air filter box (1) is connected with a first fan (13), and the right end of the inner cavity of the air filter box (1) is connected with a dehumidifying and cooling device through a vent pipe (15);
the dehumidification cooling device comprises a dehumidification cooling box (16), a base (21) and a water tank (20), wherein the dehumidification cooling box (16) is arranged above the base (21), and the water tank (20) is detachably arranged between the dehumidification cooling box (16) and the base (21); a refrigerating machine (17) is fixedly arranged above the dehumidifying and cooling box (16), the lower end of the refrigerating machine (17) is connected with two cooling coils (18), the cooling coils are positioned in the inner cavity of the dehumidifying and cooling box (16), an annular plate (19) is vertically arranged between the two cooling coils, and the annular plate (19) is fixed in the dehumidifying and cooling box (16);
a funnel (22) is arranged below the cooling coil, the funnel (22) is arranged at the lower end of the dehumidification and cooling box (16) in a penetrating manner, and the inner cavity of the dehumidification and cooling box (16) is communicated with the water tank (20) through the funnel (22);
the left end of the inner cavity of the dehumidification cooling box (16) is communicated with the inner cavity of the air filter box (1) through a vent pipe (15), and the right end of the inner cavity of the dehumidification cooling box (16) is connected with a second fan (14).
2. The apparatus of claim 1 for mine shaft wet heat remediation, wherein: the periphery of the filter screen (4) is provided with a mounting frame (10), the outer sides of the upper end and the lower end of the mounting frame (10) are respectively provided with a mounting groove (23), and the mounting frame (10) is movably arranged on the inner side of the mounting groove (23); a plurality of through holes are formed in the mounting groove on the outer side of the lower end of the mounting frame (10).
3. The apparatus for mine wet heat remediation of claim 2, wherein: the upper end and the lower end of the mounting frame (10) are respectively connected with the mounting grooves at the corresponding positions through springs (24).
4. The apparatus for mine wet heat remediation of claim 3, wherein: the lower end of the air filter box (1) is detachably provided with a dust collection box (3); and a dust exhaust port (9) corresponding to the position is formed in the box body of the air filter box (1) below the filter screen (4).
5. The apparatus of claim 4 for mine shaft wet heat remediation, wherein: the annular plate (19) is provided with a plurality of through holes.
6. An apparatus according to claim 5 for damp heat treatment of a mine, wherein: the working method of the device comprises the following steps:
when the damp and hot treatment of the environment in the mine is needed, a first fan (13), a second fan (14) and a refrigerator (17) are started, and the first fan (13) and the second fan (14) rotate in the same direction; the first fan (13) rotates to convey damp and hot air in the mine into the filtering device, and the damp and hot air passes through the three filter screens to filter tiny particles in the damp and hot air; when more impurities and dust on the filter screen (4) need to be cleaned, the motor (5) is started to rotate through the driving wheel (6) and the driven wheel (7) to drive the rotating shaft (11) to rotate, so that the brush (12) is driven to rotate to clean the filter screen, and the upper end and the lower end of the filter screen are respectively connected with the mounting groove through springs, so that when the brush touches the filter screen (4), the filter screen (4) can vibrate, and the cleaning effect of the filter screen is better; the dust cleaned on the filter screen enters the detachable dust collection box (3) through the dust discharge port (9) to be collected;
the filtered damp and hot air enters the dehumidifying and cooling box (16) through the vent pipe (15); the hot and humid air entering the dehumidification and cooling box (16) is contacted with the cooling coil (18) on the left side and then is liquefied in a cooling way, and then is contacted with the cooling coil on the right side through the annular plate and liquefied in a cooling way, so that the dehumidification and cooling of the hot and humid air are realized; the dehumidified and cooled air is discharged under the action of a second fan (14), so that damp and hot treatment of the air in the mine is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436430.3A CN111577371A (en) | 2020-05-21 | 2020-05-21 | Device and method for mine damp-heat treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436430.3A CN111577371A (en) | 2020-05-21 | 2020-05-21 | Device and method for mine damp-heat treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111577371A true CN111577371A (en) | 2020-08-25 |
Family
ID=72126859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010436430.3A Pending CN111577371A (en) | 2020-05-21 | 2020-05-21 | Device and method for mine damp-heat treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111577371A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112439306A (en) * | 2020-11-09 | 2021-03-05 | 黑龙江建筑职业技术学院 | Indoor moisture discharge device of building electric general control |
| CN112604412A (en) * | 2020-11-03 | 2021-04-06 | 宁波职业技术学院 | SCR flue gas denitration is intelligent dust collector in advance |
| CN113374519A (en) * | 2021-06-07 | 2021-09-10 | 中铁十九局集团轨道交通工程有限公司 | Cooling equipment for shield tunnel construction |
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| CN210153984U (en) * | 2019-06-20 | 2020-03-17 | 郑州恒基机电设备有限公司 | Central air conditioning new trend system's air dust filter screen convenient to clearance |
| CN213016419U (en) * | 2020-08-06 | 2021-04-20 | 刘华晶 | Self-ventilation device for coal mine |
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2020
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| CN107081022A (en) * | 2017-06-09 | 2017-08-22 | 周琼 | A kind of air filter for woven nylon |
| CN107906625A (en) * | 2017-12-14 | 2018-04-13 | 成都千里之行科技有限公司 | A kind of environment-friendly type self-cleaning air purifier |
| CN209195469U (en) * | 2018-10-08 | 2019-08-02 | 辽宁工程技术大学 | Mine safety dehumidifying and cooling ventilator |
| CN210153984U (en) * | 2019-06-20 | 2020-03-17 | 郑州恒基机电设备有限公司 | Central air conditioning new trend system's air dust filter screen convenient to clearance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112604412A (en) * | 2020-11-03 | 2021-04-06 | 宁波职业技术学院 | SCR flue gas denitration is intelligent dust collector in advance |
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| CN112439306A (en) * | 2020-11-09 | 2021-03-05 | 黑龙江建筑职业技术学院 | Indoor moisture discharge device of building electric general control |
| CN112439306B (en) * | 2020-11-09 | 2022-12-23 | 黑龙江建筑职业技术学院 | Indoor moisture discharge device of building electric general control |
| CN113374519A (en) * | 2021-06-07 | 2021-09-10 | 中铁十九局集团轨道交通工程有限公司 | Cooling equipment for shield tunnel construction |
| CN113374519B (en) * | 2021-06-07 | 2023-05-19 | 中铁十九局集团轨道交通工程有限公司 | Cooling equipment for shield tunnel construction |
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Application publication date: 20200825 |
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| RJ01 | Rejection of invention patent application after publication |