CN113465078A - Adaptable crown block vortex ventilation device for tall and big space - Google Patents
Adaptable crown block vortex ventilation device for tall and big spaceDownload PDFInfo
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- CN113465078A CN113465078ACN202110795583.1ACN202110795583ACN113465078ACN 113465078 ACN113465078 ACN 113465078ACN 202110795583 ACN202110795583 ACN 202110795583ACN 113465078 ACN113465078 ACN 113465078A
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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
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/32—Supports for air-conditioning, air-humidification or ventilation units
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
Translated fromChinese
Description
Technical Field
The invention belongs to the field of air ventilation, relates to an air vortex ventilation device, and particularly relates to an air vortex ventilation device which is applicable to a crown block and used in a tall and big space.
Background
With the rapid development of economy and science and technology, the environment of industrial plants is different according to different production process requirements, wherein high-space plants generally exist. In the production process, industries such as metallurgy, welding, mineral aggregate processing and the like can generate a large amount of air pollutants in a factory building, in order to meet the process requirements and build the indoor air quality meeting the standard, the pollutants need to be efficiently captured, and then the pollutants are intensively treated to reach the standard and then are discharged into the atmosphere.
Vortex ventilation is well adapted in the control of pollutants in high spaces due to its very small entrainment and stable airflow conditions, wherein a necessary condition for vortex generation is that there are blowing openings in the vertical direction all around to provide airflow with angular momentum. In a factory building with a large space, an overhead traveling crane is usually arranged for conveniently carrying materials, and the overhead traveling crane requires no obstacle in the operation space in the operation process, so that the contradiction is generated between the overhead traveling crane and an air supply system for providing angular momentum in a vortex ventilation device.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vortex ventilation device which is applicable to a crown block and used in a tall and big space, and solve the technical problem that the vortex ventilation device in the prior art cannot be simultaneously and well adapted to the crown block on the premise of efficiently trapping pollutants.
The invention is realized by adopting the following technical scheme:
a vortex ventilation device applicable to a crown block and used for a tall space is arranged on a ceiling and the ground, and a ventilation area, a crown block operation area and a pollution source area are arranged between the ceiling and the ground from top to bottom along the vertical direction;
an air exhaust mechanism is arranged on the ceiling in the air exhaust area, and a plurality of uniformly distributed upper lifting air supply pipes are arranged on the ceiling around the air exhaust area;
the pollution source region is internally provided with a pollution source, a plurality of lower liftable air supply pipes are arranged on the ground around the pollution source region, and the upper liftable air supply pipes and the lower liftable air supply pipes are in one-to-one correspondence and are vertically and coaxially arranged;
the space between the upper lifting air supply pipe and the lower lifting air supply pipe is an overhead traveling crane running area;
the upper liftable blast pipe comprises an upper telescopic blast pipe, a plurality of upper blast outlets are vertically arranged on one longitudinal side of the upper telescopic blast pipe, and the upper blast outlets are positioned below the air exhaust mechanism;
an upper hydraulic lifting rod is arranged on the other longitudinal side of the upper telescopic air pipe; the top end of the upper hydraulic lifting rod is fixed on the ceiling, and the bottom end of the upper hydraulic lifting rod is fixed with the bottom end of the upper telescopic air pipe; the top end of the upper telescopic air pipe is fixedly connected with the bottom end of an upper folding connecting rod, and the top end of the upper folding connecting rod is fixed on a ceiling;
the upper telescopic air pipe can be driven by the upper hydraulic lifting rod to vertically lift, and meanwhile, the upper telescopic air pipe and the upper folding connecting rod can be stretched and folded per se;
the lower liftable blast pipe comprises a lower telescopic blast pipe, and a plurality of lower air supply outlets are vertically formed in one longitudinal side of the lower telescopic blast pipe;
a lower hydraulic lifting rod is arranged on the other longitudinal side of the lower telescopic air pipe; the bottom end of the lower hydraulic lifting rod is fixed on the ground, and the top end of the lower hydraulic lifting rod is fixed with the top end of the lower telescopic air pipe;
the lower telescopic air pipe can be driven by the lower hydraulic lifting rod to do telescopic motion along the vertical direction.
The invention also has the following technical characteristics:
the exhaust mechanism comprises an exhaust pipe arranged on a ceiling, the bottom end of the exhaust pipe is connected with an exhaust hood, and the bottom of the exhaust hood is provided with an exhaust outlet; an exhaust fan is arranged in the exhaust hood.
The bottom end of the upper telescopic air pipe is provided with an upper axial flow blower; and a lower axial flow blower is arranged at the top end of the lower telescopic air pipe.
The upper telescopic air pipe is composed of a plurality of upper single air pipes, and the pipe diameters of the upper single air pipes are gradually reduced from the top end to the bottom end of the upper telescopic air pipe.
The lower telescopic air pipe is composed of a plurality of lower single air pipes, and the pipe diameters of the lower single air pipes are reduced section by section from the bottom end to the top end of the lower telescopic air pipe.
The upper air supply opening is provided with an upper air deflector, and the lower air supply opening is provided with a lower air deflector.
The upper air deflector and the lower air deflector are arranged at the upper air supply outlet and the lower air supply outlet in an embedded mode.
The top ends of the upper hydraulic lifting rod and the upper folding connecting rod are fixed on an upper fixing plate, and the upper fixing plate is fixed on a ceiling.
The bottom end of the lower hydraulic lifting rod is fixed on the lower fixing plate, the lower fixing plate is integrally and fixedly arranged at the bottom end of the lower telescopic air pipe, and the lower fixing plate is fixed on the ground.
Compared with the prior art, the invention has the following technical effects:
the invention relates to a vortex ventilation device applicable to a crown block and used for a tall and big space.A liftable blast pipe and a lower liftable blast pipe are respectively arranged above and below the crown block, and the liftable blast pipe and the lower liftable blast pipe are matched with exhaust air flow generated by an exhaust mechanism by providing air flow with angular momentum, so that powerful vortex can be generated to realize the efficient capture of pollutants; when the overhead traveling crane moves to vortex ventilation unit department, will go up flexible tuber pipe and the shrink of lower flexible tuber pipe through last hydraulic lifting rod and lower hydraulic lifting rod and make the overhead traveling crane pass through smoothly, under the prerequisite of guaranteeing the high-efficient entrapment of pollutant, realized simultaneously that vortex ventilation unit has good adaptability to the overhead traveling crane.
Drawings
Fig. 1 is a schematic overall structure diagram of an adaptable crown block vortex ventilation device for tall and large spaces.
Fig. 2 is a schematic structural view of the upper liftable air supply pipe in an extension state.
Fig. 3 is a schematic structural view of the upper liftable air supply pipe in a contracted state.
Fig. 4 is a schematic structural view of the lower liftable air supply pipe in an extended state.
Fig. 5 is a schematic structural view of the lower liftable air supply pipe in a contracted state.
Fig. 6 is a schematic structural view of the air exhausting mechanism.
Fig. 7 is a pollutant flow diagram after a simulation test is carried out on indoor pollutants by an adaptable crown block vortex ventilation device for a tall space in the embodiment.
Fig. 8 is a graph of indoor pressure distribution after simulation test of indoor pollutants by an adaptable crown block vortex ventilator for high and large spaces in an embodiment.
The meaning of the individual reference symbols in the figures is: 1-an exhaust mechanism, 2-an upper lifting blast pipe, 3-a lower lifting blast pipe, 4-a ceiling, 5-the ground, 6-a pollution source, 7-an exhaust area, 8-a crown block operation area and 9-a pollution source area;
101-exhaust pipe, 102-exhaust hood and 103-exhaust outlet;
201-upper telescopic air duct, 202-upper air supply outlet, 203-upper hydraulic lifting rod, 204-upper folding connecting rod, 205-upper axial flow blower, 206-upper single air duct, 207-upper air deflector, 208-upper fixing plate;
301-lower telescopic air pipe, 302-lower air supply outlet, 303-lower hydraulic lifting rod, 304-lower axial flow blower, 305-lower single air pipe, 306-lower air deflector, 307-lower fixing plate.
The present invention will be explained in further detail with reference to examples.
Detailed Description
All parts in the present invention are those known in the art, unless otherwise specified.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example (b):
the embodiment provides an adaptable crown block vortex ventilation device for a tall space, which is arranged on aceiling 4 and aground 5, and aventilation area 7, a crown block running area 8 and apollution source area 9 are vertically arranged between theceiling 4 and theground 5 from top to bottom as shown in FIGS. 1 to 6;
anair exhaust mechanism 1 is arranged on aceiling 4 in anair exhaust area 7, and a plurality of upper liftingair supply pipes 2 which are uniformly distributed are arranged on theceiling 4 around theair exhaust area 7;
apollution source 6 is arranged in apollution source area 9, a plurality of lower liftableair supply pipes 3 are arranged on theground 5 around thepollution source area 9, and the upper liftableair supply pipes 2 and the lower liftableair supply pipes 3 are arranged in a one-to-one correspondence and vertical and coaxial mode;
the space between the upper liftingair supply pipe 2 and the lower liftingair supply pipe 3 is an overhead traveling crane running area 8;
the upperliftable blast pipe 2 comprises an uppertelescopic air pipe 201, a plurality of upperair supply outlets 202 are vertically arranged on one longitudinal side of the uppertelescopic air pipe 201, and the upperair supply outlets 202 are positioned below theair exhaust mechanism 1;
an upperhydraulic lifting rod 203 is arranged on the other longitudinal side of the uppertelescopic air pipe 201; the top end of the upperhydraulic lifting rod 203 is fixed on theceiling 4, and the bottom end of the upperhydraulic lifting rod 203 is fixed with the bottom end of the uppertelescopic air duct 201; the top end of the uppertelescopic air duct 201 is fixedly connected with the bottom end of an upperfolding connecting rod 204, and the top end of the upperfolding connecting rod 204 is fixed on theceiling 4;
the uppertelescopic air pipe 201 can be driven by the upperhydraulic lifting rod 203 to lift vertically, and meanwhile, the uppertelescopic air pipe 201 and the upperfolding connecting rod 204 can be stretched and folded;
the lowerliftable blast pipe 3 comprises a lowertelescopic air pipe 301, and a plurality of lowerair supply outlets 302 are vertically formed in one longitudinal side of the lowertelescopic air pipe 301;
a lowerhydraulic lifting rod 303 is arranged on the other longitudinal side of the lowertelescopic air pipe 301; the bottom end of the lowerhydraulic lifting rod 303 is fixed on theground 5, and the top end of the lowerhydraulic lifting rod 303 is fixed with the top end of the lowertelescopic air pipe 301;
the lowertelescopic air pipe 301 can be driven by the lowerhydraulic lifting rod 303 to perform vertical telescopic motion.
As a specific scheme of this embodiment, theexhaust mechanism 1 includes anexhaust duct 101, anexhaust hood 102 is integrally and fixedly arranged at the bottom end of theexhaust duct 101, and anexhaust outlet 103 is arranged at the bottom end of theexhaust hood 102; an exhaust fan is arranged in theexhaust hood 102 and is installed at the bottom end of theexhaust pipe 101; in this embodiment, theexhaust mechanism 1 is disposed directly above the pollution source 66, and is used for collecting the exhaust airflow and collecting pollutants generated by the pollution source 66.
As a specific solution of this embodiment, an upperaxial flow blower 205 is disposed at the bottom end of the uppertelescopic air duct 201; a loweraxial flow blower 304 is arranged at the top end of the lowertelescopic air pipe 301; in this embodiment, the airflow generated by the upperaxial flow blower 205 and the loweraxial flow blower 304 interacts with the airflow generated by theexhaust mechanism 1 to generate a vortex.
As a specific scheme of this embodiment, the uppertelescopic air duct 201 is composed of a plurality of upper single-air-ducts 206, and the pipe diameter of the upper single-air-duct 206 decreases from the top end to the bottom end of the uppertelescopic air duct 201 section by section; the lowertelescopic air duct 301 is composed of a plurality of lowersingle air ducts 305, and the pipe diameter of the lowersingle air ducts 305 is reduced section by section from the bottom end to the top end of the lowertelescopic air duct 301.
In this embodiment, the length of the uppersingle air duct 206 and the lowersingle air duct 305, which are not provided with the upperair supply outlet 202 and the lowerair supply outlet 302, is 600mm per section, and the length of the uppersingle air duct 206 and the lowersingle air duct 305, which are provided with the upperair supply outlet 202 and the lowerair supply outlet 302, is 700mm per section; the uppertelescopic air duct 201 is composed of four upper single-section air ducts 206, and each air supply vertical pipe of the lowertelescopic air duct 301 is composed of seven lower single-section air ducts 305.
As a specific scheme of this embodiment, anupper air deflector 207 is installed at the upperair supply outlet 202, and alower air deflector 306 is installed at the lowerair supply outlet 302; theupper air deflector 207 and thelower air deflector 306 are arranged at the upperair supply outlet 202 and the lowerair supply outlet 302 in an embedded manner; in this embodiment, theupper air deflector 207 and thelower air deflector 306 play a role in adjusting the air supply angle, and the uppertelescopic air duct 201 and the lowertelescopic air duct 301 can be conveniently contracted by being installed in an embedded manner.
As a specific solution of this embodiment, the top ends of the upperhydraulic lifting rod 203 and the upperfolding connecting rod 204 are fixed on anupper fixing plate 208, and theupper fixing plate 208 is fixed on theceiling 4; the bottom end of the lowerhydraulic lifting rod 303 is fixed on alower fixing plate 307, thelower fixing plate 307 is integrally and fixedly arranged at the bottom end of the lowertelescopic air duct 301, and thelower fixing plate 307 is fixed on theground 5; in this embodiment, theupper fixing plate 208 and thelower fixing plate 307 play a role of facilitating installation.
In theembodiment 2, the upperhydraulic lifting rod 203, the lowerhydraulic lifting rod 303 and the upperfolding connecting rod 204 are all composed of a plurality of single lifting rods, and the length of each single lifting rod is 600 mm; the upperhydraulic lifting rod 203 and the lowerhydraulic lifting rod 303 are provided with power sources, and the upperfolding connecting rod 204 is not provided with a power source;
in this embodiment, the uppertelescopic air ducts 201 and the lowertelescopic air ducts 301 are both rectangular cubic structures, and the number of the uppertelescopic air ducts 201 and the number of the lowertelescopic air ducts 301 are four; the upperair supply outlet 202 and the lowerair supply outlet 302 are both rectangular structures, the number of the upperair supply outlet 202 is two, and the number of the lowerair supply outlet 302 is three.
The working process of the invention is as follows:
firstly, when the overhead traveling crane runs, apollution source 6 can be generated, and theair exhaust mechanism 1, the upper liftableair supply pipe 2 and the lower liftableair supply pipe 3 are installed at proper positions according to the position of thepollution source 6; rotating and adjusting the air supply directions of the upper liftableair supply pipe 2 and the lower liftableair supply pipe 3 according to the actual ventilation requirement; according to the running height of the crown block, the upperhydraulic lifting rod 203 and the upperhydraulic lifting rod 203 are started, so that the upper liftingair supply pipe 2 and the lower liftingair supply pipe 3 are at a proper height, and the crown block is prevented from colliding.
Secondly, after theexhaust mechanism 1, the upper liftableair supply pipe 2 and the lower liftableair supply pipe 3 are installed and adjusted, the exhaust fan of theexhaust mechanism 1 is started, the upper axial flowair supply fan 205 and the lower axial flowair supply fan 304 are started, the vortex ventilation device starts ventilation operation, at the moment, the upper axial flowair supply fan 205 and the lower axial flowair supply fan 304 supply air together, two air flows sent out from the upperair supply outlet 202 and the lowerair supply outlet 302 are converged together to generate an air flow with angular momentum, the air flow with angular momentum and a vertical air flow generated by theexhaust mechanism 1 interact with each other, a powerful vortex is generated right above thepollution source 6, the vortex has stability and low winding suction rate, and pollutants generated by thepollution source 6 can be efficiently collected and discharged by utilizing the vortex.
Thirdly, when the overhead traveling crane runs to the upperliftable blast pipe 2 and the lowerliftable blast pipe 3, the upperhydraulic lifting rod 203 and the lowerhydraulic lifting rod 303 are started, so that the uppertelescopic air pipe 201, the lowertelescopic air pipe 301 and the upperfolding connecting rod 204 are contracted, and the overhead traveling crane can smoothly pass through.
Fourthly, when the vortex ventilation device does not perform ventilation operation, the lowertelescopic air pipe 301 is folded to the minimum height under the driving of the lowerhydraulic lifting rod 303, so that the occupied space is reduced, and personnel passing and cargo carrying can be facilitated.
Simulation test:
simulation tests were carried out using the adaptable crown block scroll ventilation device for tall and large spaces described above, and the results are shown in fig. 7 and 8. In this embodiment, the distance from thepollution source 6 to theair outlet 103 in the simulation test is 9 meters, the distance between the adjacent upperair supply outlet 202 and the adjacent lowerair supply outlet 302 is 1.8 meters, and the geometric dimensions of the upperair supply outlet 202 and the adjacent lowerair supply outlet 302 are 0.3 × 0.4 meters; the section size of theair outlet 103 is 3 x 3 m; according to different ascending air velocity at different heights, the air supply speed of the upperair supply outlet 202 and the lowerair supply outlet 302 is increased from bottom to top in sequence, the air supply speed is specifically 3 meters per second, 4 meters per second, 5 meters per second, 6 meters per second and 7 meters per second from bottom to top, and the air exhaust speed is 10 meters per second, so that the air supply air flow is accurately sent to the central vortex area and the vortex structure is not blown away.
As can be seen from fig. 7, the numerical simulation result set according to the environmental parameters of the general plant can generate a stable vortex structure, and has a good control effect on pollutants; as can be seen from fig. 8, the pressure inside the scroll structure gradually increases from inside to outside, but the inside of the entire scroll structure is in a negative pressure state. The negative pressure state of the vortex structure is effective in controlling the contaminants and preventing them from diffusing into the environment.
Claims (9)
1. A vortex ventilation device applicable to crown blocks and used for tall and large spaces is arranged on a ceiling (4) and a ground (5), and is characterized in that a discharge area (7), a crown block operation area (8) and a pollution source area (9) are arranged between the ceiling (4) and the ground (5) from top to bottom along the vertical direction;
an air exhaust mechanism (1) is arranged on the ceiling (4) in the air exhaust area (7), and a plurality of upper lifting air supply pipes (2) which are uniformly distributed are arranged on the ceiling (4) around the air exhaust area (7);
a pollution source (6) is arranged in the pollution source area (9), a plurality of lower liftable air supply pipes (3) are arranged on the ground (5) around the pollution source area (9), and the upper liftable air supply pipes (2) and the lower liftable air supply pipes (3) are in one-to-one correspondence and are vertically and coaxially arranged;
the space between the upper lifting air supply pipe (2) and the lower lifting air supply pipe (3) is an overhead traveling crane running area (8);
the upper liftable air supply pipe (2) comprises an upper telescopic air pipe (201), a plurality of upper air supply outlets (202) are vertically formed in one longitudinal side of the upper telescopic air pipe (201), and the upper air supply outlets (202) are positioned below the air exhaust mechanism (1);
an upper hydraulic lifting rod (203) is arranged on the other longitudinal side of the upper telescopic air pipe (201); the top end of the upper hydraulic lifting rod (203) is fixed on the ceiling (4), and the bottom end of the upper hydraulic lifting rod (203) is fixed with the bottom end of the upper telescopic air pipe (201); the top end of the upper telescopic air pipe (201) is fixedly connected with the bottom end of an upper folding connecting rod (204), and the top end of the upper folding connecting rod (204) is fixed on a ceiling (4);
the upper telescopic air pipe (201) can be driven by the upper hydraulic lifting rod (203) to lift vertically, and meanwhile, the upper telescopic air pipe (201) and the upper folding connecting rod (204) can be stretched and folded;
the lower liftable air supply pipe (3) comprises a lower telescopic air pipe (301), and a plurality of lower air supply outlets (302) are vertically formed in one longitudinal side of the lower telescopic air pipe (301);
a lower hydraulic lifting rod (303) is arranged on the other longitudinal side of the lower telescopic air pipe (301); the bottom end of the lower hydraulic lifting rod (303) is fixed on the ground (5), and the top end of the lower hydraulic lifting rod (303) is fixed with the top end of the lower telescopic air pipe (301);
the lower telescopic air pipe (301) can be driven by the lower hydraulic lifting rod (303) to do telescopic motion along the vertical direction.
2. The adaptable crown block vortex ventilation device for tall and big space according to claim 1, characterized in that the exhaust mechanism (1) comprises an exhaust duct (101) installed on the ceiling (4), the bottom end of the exhaust duct (101) is connected with an exhaust hood (102), and the bottom of the exhaust hood (102) is provided with an exhaust outlet (103); an exhaust fan is arranged in the exhaust hood (102).
3. An adaptable crown block vortex ventilation device for tall spaces according to claim 1, characterized in that the bottom end of the upper telescopic air duct (201) is provided with an upper axial flow blower (205); the top end of the lower telescopic air pipe (301) is provided with a lower axial flow blower (304).
4. An adaptable crown block scroll ventilation device for tall spaces according to claim 1, wherein said upper telescopic air duct (201) is composed of a plurality of upper single air ducts (206), and the diameter of said upper single air duct (206) decreases from the top end to the bottom end of the upper telescopic air duct (201).
5. An adaptable crown block scroll ventilation device for tall spaces according to claim 1, wherein said lower telescopic duct (301) is comprised of a plurality of lower single ducts (305), the diameter of said lower single ducts (305) decreasing from the bottom end to the top end of the lower telescopic duct (301) in stages.
6. An adaptable crown block scroll ventilation device for tall spaces according to claim 1, characterized in that an upper deflector (207) is installed at the upper supply port (202) and a lower deflector (306) is installed at the lower supply port (302).
7. An adaptable crown block scroll ventilation device for tall spaces according to claim 6, wherein the upper deflector (207) and the lower deflector (306) are installed in-line at the upper supply port (202) and the lower supply port (302).
8. An adaptable crown block scroll ventilation device for tall spaces according to claim 1, characterized in that the top ends of the upper hydraulic lifting rod (203) and the upper folding connecting rod (204) are fixed to an upper fixing plate (208), and the upper fixing plate (208) is fixed to the ceiling (4).
9. The scroll ventilation apparatus of adaptable crown block for tall space according to claim 1, wherein the bottom end of the lower hydraulic lifting rod (303) is fixed on a lower fixing plate (307), the lower fixing plate (307) is integrally fixed on the bottom end of the lower telescopic wind pipe (301), and the lower fixing plate (307) is fixed on the ground (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795583.1ACN113465078B (en) | 2021-07-14 | 2021-07-14 | A adaptable overhead traveling crane vortex ventilation unit for tall and big space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795583.1ACN113465078B (en) | 2021-07-14 | 2021-07-14 | A adaptable overhead traveling crane vortex ventilation unit for tall and big space |
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| CN113465078Atrue CN113465078A (en) | 2021-10-01 |
| CN113465078B CN113465078B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110795583.1AActiveCN113465078B (en) | 2021-07-14 | 2021-07-14 | A adaptable overhead traveling crane vortex ventilation unit for tall and big space |
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| CN113465078B (en) | 2024-06-04 |
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