CN110043306B - Tunnel fan for tunnel construction - Google Patents
Tunnel fan for tunnel construction Download PDFInfo
- Publication number
- CN110043306B CN110043306B CN201910435522.7A CN201910435522A CN110043306B CN 110043306 B CN110043306 B CN 110043306B CN 201910435522 A CN201910435522 A CN 201910435522A CN 110043306 B CN110043306 B CN 110043306B
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- China
- Prior art keywords
- air
- side wall
- barrel
- fixedly connected
- tunnel
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- 238000010276 construction Methods 0.000 title claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 11
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 11
- 241001330002 Bambuseae Species 0.000 claims description 11
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 11
- 239000011425 bamboo Substances 0.000 claims description 11
- 230000030279 gene silencing Effects 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 4
- 229910052895 riebeckite Inorganic materials 0.000 claims description 4
- 238000009987 spinning Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 4
- 241000883990 Flabellum Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction 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
- 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
- E21F5/04—Spraying barriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a tunnel fan for tunnel construction, which comprises a base barrel, wherein the left end and the right end of the base barrel are movably connected with an air duct and an air collecting pipe, the inner side walls of the air duct and the air collecting pipe are arranged in a conical inclined plane, an inner barrel is sleeved in the base barrel, a plurality of supporting plates are fixedly connected to the outer side wall of the inner barrel, the right end of the inner barrel is fixedly connected with a flow guide cone, the right end of the flow guide cone penetrates through a dust cover and extends into the air collecting pipe, a plurality of air holes are formed in the joint of the flow guide cone and the inner barrel, a motor is fixedly installed in the inner barrel, a plurality of fan blades are fixedly connected to the output shaft of the motor, and a. According to the invention, the gas can flow along the flow guide cone after entering the device, so that the resistance of the motor to the gas flow is reduced, the gas can rapidly flow between the base cylinder and the inner cylinder, the pressure head and the flow rate are improved by the aid of the rotary flow guide lines, and the working efficiency of the device is improved.
Description
Technical Field
The invention relates to the technical field of tunnel ventilation, in particular to a tunnel fan for tunnel construction.
Background
When the tunnel is built, because the tunnel is a relatively closed environment with only two ends communicated with the outside, and some tunnels are long, the exchange of gas in the tunnel and the outside is very important; when the tunnel is built, a large amount of dust is generated by excavation, the dust floats in gas, the gas is polluted, not only is the normal construction process influenced, but also the health of excavating workers is adversely affected; the traditional fan generally blows air outwards only by the rotation of fan blades, and because the motor is arranged in the middle of the fan and the rear end of the motor is a plane, the rear end of the motor causes certain resistance to the air circulation, and the working efficiency of the fan is low; and when the fan is installed at present, the fan is generally hung at the top of the tunnel through a fixed mounting frame, and the parallelism of the fan cannot be adjusted (the working state of the fan is optimal when the fan is parallel to the tunnel), so that the ventilation effect of the fan is reduced, and the tunnel fan for tunnel construction is provided.
Disclosure of Invention
The invention aims to provide a tunnel fan for tunnel construction, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a tunnel fan for tunnel construction comprises a base barrel, wherein the left end and the right end of the base barrel are movably connected with an air guide pipe and an air collecting pipe, the inner side walls of the air guide pipe and the air collecting pipe are arranged in a conical inclined plane, the side wall of the air guide pipe is fixedly connected with a water pipe, the inner end of the water pipe is fixedly connected with a spray head, a dust cover is clamped at the joint of the air collecting pipe and the base barrel, an inner barrel is sleeved inside the base barrel, the outer side wall of the inner barrel is fixedly connected with a plurality of supporting plates, the right end of the inner barrel is fixedly connected with a flow guide cone, the right end of the flow guide cone penetrates through the dust cover and extends into the air collecting pipe, a plurality of air holes are formed in the joint of the flow guide cone and the inner barrel, a motor is fixedly installed inside the inner barrel;
preferably, it has the annular to open on the lateral wall of base section of thick bamboo, the inside fixed cover of annular has connect the hoop, the upper end of hoop is rotated and is connected with the fixed block, the fixed block passes through expansion bolts and the top lateral wall fixed connection in tunnel.
Preferably, fixedly connected with loop bar on the right side lateral wall of fixed block, the inside meshing of loop bar is connected with the double-screw bolt, the ring piece has been cup jointed in rotating on the lateral wall of double-screw bolt, the lower extreme of ring piece rotates and is connected with the connecting rod, the lower extreme of connecting rod rotates and is connected with the hoop strip, hoop strip fixed weld is on the lateral wall of collection tuber pipe, just the ring piece screws through set screw with the double-screw bolt.
Preferably, the taper inclination of the inner side wall of the air guide pipe is between 2 and 5 degrees, and the taper inclination of the inner side wall of the air collecting pipe is between 10 and 15 degrees.
Preferably, a plurality of air holes are formed in the connection position of the flow guide cone and the inner cylinder, and the inner cylinder is connected with the motor through a plurality of transverse strips arranged on the inner wall of the inner cylinder.
Preferably, the inner side wall of the air guide pipe and the outer side wall of the guide cone are provided with rotary flow guide lines.
Preferably, a circle of annular silencing groove is formed in the annular wall, close to the fan blades, of the air guide pipe, a plurality of fin plates are connected to three groove walls of the silencing groove, and a layer of asbestos wraps the silencing groove through an aluminum plate.
Preferably, the end part of the air guide pipe is movably connected with two semicircular closing covers through a hinge shaft, and one end of the air collecting pipe, which is far away from the base barrel, is fixedly connected with a protective net through a bolt.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, when the fan blades work, the atomizing head sprays water towards the interior of the silencer at the left end, and the sprayed water can be continuously blown out of the device, so that the humidity of the gas in the tunnel is increased, the dust in the tunnel is reduced, the air in the tunnel is cleaned, the construction of a fresh air working environment is facilitated, and the normal operation of construction is ensured; the gas can flow along the flow guide cone after entering the device, so that the resistance caused by gas flow turbulence is reduced, the gas can rapidly flow between the base cylinder and the inner cylinder, the working efficiency of the device is improved, the rotary flow guide lines arranged on the inner side wall of the air guide pipe enable the gas flow to be discharged, the gas flow is self-rotated, the farther distance can be transmitted, the installation amount of a fan is reduced, and the cost is reduced; and the device passes through the fixed block to be fixed behind the tunnel top, rotates the double-screw bolt and makes the connecting rod take place to rotate, and the lower extreme of connecting rod produces the effort that upwards pulls or is pressing downwards to the guide duct, makes the device rotate round the turning point of hoop and fixed block, plays the levelness of adjusting the device then, improves the work efficiency of the device then, has still set up the noise reduction structure in the work progress in addition.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the base cylinder, air duct, inner cylinder and cone of the present invention;
FIG. 3 is a cross-sectional view of the base cylinder, inner cylinder and cone of the present invention;
FIG. 4 is an exploded view of the base cylinder, air collecting duct and inner cylinder of the present invention;
FIG. 5 is a cross-sectional view of the base cartridge, inner cartridge, motor and air collecting duct of the present invention;
FIG. 6 is a cross-sectional view of the present invention at the air collecting duct;
figure 7 is an exploded view of the hoop, mounting block and base cartridge of the present invention;
FIG. 8 is an exploded view of a stud and ring block of the present invention;
fig. 9 is an enlarged view of the portion a of fig. 2 according to the present invention.
In the figure: 1. the device comprises a base cylinder, 2, an air guide pipe, 3, an inner cylinder, 4, a supporting plate, 5, a flow guide cone, 6, air holes, 7, a motor, 8, fan blades, 9, a dust cover, 10, a water pipe, 11, a spray head, 12, a protective net, 13, an annular groove, 14, a hoop, 15, a fixed block, 16, a loop bar, 17, a stud, 18, a loop block, 19, a connecting rod, 20, a hoop strip, 21, an air collecting pipe, 22, a flow guide line, 23, a fin plate, 24, an aluminum plate, 25, asbestos, 26, a sealing cover, 27 and a silencing groove.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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. 1-9, the present invention provides a technical solution: a tunnel blower for tunnel construction comprises a base barrel 1, wherein the left end and the right end of the base barrel 1 are both connected with an air guide pipe 2 and an air collecting pipe 21 through bolts, the inner side walls of the air guide pipe 2 and the air collecting pipe 21 are arranged in a conical inclined plane, the conical inclination of the inner side wall of the air collecting pipe 21 is 10-15 degrees, namely the diameters of two ends of an inner hole of the air collecting pipe 21 are different and are horn-shaped, the inner diameter of one end close to the base barrel 1 is smaller, the diameter of one end far away from the base barrel 1 is larger, when air enters from the air collecting pipe 21 on the right side, the air enters through one end with the larger diameter of the air collecting pipe 21, when the air flows from the right end to the left end of the air collecting pipe 21, the space is gradually reduced, the air flowing speed is increased, the pressure head is increased, the air blown out,
and the conical inclination of the inner side wall of the air guide pipe 2 is between 2-5 degrees, the left end is only slightly larger, which is beneficial for the quick spray head 11 to spray water, and then part of the water attached to the inner side wall of the air guide pipe 2 at the left end flows out along the inner inclined plane of the air guide pipe 2, so as to prevent water from accumulating inside the device, a water pipe 10 is fixedly connected to the side wall of the air guide pipe 2, the other end of the water pipe 10 is connected with an external water pump, the inner end of the water pipe 10 is fixedly connected with the spray head 11, the water sprayed by the spray head 11 is atomized and can float in the air, when being blown into the tunnel by the fan blades 8, the water floats inside the tunnel, the humidity in the tunnel is increased, then the dust in the tunnel is reduced, the effect of purifying the tunnel gas is achieved, and the dust cover 9 is clamped at the connection position of the right end air collection pipe 21 and the base barrel 1, as shown in figure 4, the dust cover 9 is clamped by a circle of flange and is arranged inside the air collecting pipe 21, the dust cover 9 is used for filtering dust, the dust is prevented from attaching to the fan blades 8 after entering the inside of the base barrel 1 along with the air, in addition, the inner side wall of the air guide pipe 2 is provided with the rotary guide lines 22, blown air flow has a spiral motion form, the air flow can be further reduced, the installation amount of the fan is reduced, and the cost is reduced.
Because motor 7 installs the central point that can occupy a part of volume in base section of thick bamboo 1, the air current directly gets into striking motor 7 from the right-hand member of collection tuber pipe 21 and can form the vortex, thereby the torrent reduces air current speed and pressure head, the reduction effect, gaseous flow along the surface of diversion cone 5 after getting into the device from the right-hand member, make gaseous quick circulation between base section of thick bamboo 1 and inner tube 3 then, and also be equipped with rotatory form water conservancy diversion line 22 on the lateral wall of diversion cone 5 and make the air flow have spin effect, can effectively improve the pressure head, improve the kinetic energy of air current.
Specifically, open on the lateral wall of base section of thick bamboo 1 has annular 13, the fixed hoop 14 that has connect of inside of annular 13, inside diameter when annular 14 is closed and the diameter looks adaptation of annular 13, and the lower extreme of annular 14 is equipped with the opening, and the both sides of annular 14 can outwards rotate from the opening part and open, and the opening part is equipped with the bolt and makes the annular 14 closed fixed, the upper end of annular 14 rotates and is connected with fixed block 15, fixed block 15 passes through expansion bolts and the top lateral wall fixed connection in tunnel, during the installation, at first with fixed block 15 through expansion bolts fixed connection on the top lateral wall in tunnel, when fixing base section of thick bamboo 1, the both sides of annular 14 are swung open, and the first half of annular 14 is behind the inside of annular 13, closes the lower extreme of annular 14 and fixes with the bolt, then base section of thick bamboo 1 is hung at the top in the tunnel.
In addition, a loop bar 16 is fixedly connected to the right side wall of the fixed block 15, a stud 17 is connected to the interior of the loop bar 16 in a meshed manner, a ring block 18 is rotatably sleeved on the side wall of the stud 17, a connecting rod 19 is rotatably connected to the lower end of the ring block 18, the stud 17 drives the ring block 18 to move when rotating, the angle of the connecting rod 19 changes when the ring block 18 moves, the lower end of the connecting rod 19 rises or falls due to the unchanged height of the ring block 18, a hoop strip 20 is rotatably connected to the lower end of the connecting rod 19, the hoop strip 20 is fixedly welded to the outer side wall of the air collecting pipe 21, the connecting rod 19 rotates by rotating the stud 17, the lower end of the connecting rod 19 generates an upward pulling or downward pressing acting force on the air guide pipe 2, the device rotates around the rotating point of the fixed block 15 and the loop bar 14, the device is adjusted to be horizontal to the tunnel, and the ring block 18 and the stud 17 are screwed by fixing screws, preventing loosening.
Specifically, a plurality of air holes 6 are formed in the connecting part of the flow guide cone 5 and the inner cylinder 3, the inner cylinder 3 is connected with the motor 7 through a plurality of cross bars arranged on the inner wall of the inner cylinder 3, a gap is reserved between the motor 7 and the inner wall of the inner cylinder 3 as shown in fig. 5, so that a small part of air flow flows through the air holes to achieve a heat dissipation effect, and the air holes 6 are formed in the left end of the dust cover 9, so that the cleanness of the air entering the inner cylinder 3 is guaranteed.
In addition the lateral wall of inner tube 3 is the neat concavo-convex setting of range, because motor 7 work can produce a large amount of heats, the inside temperature of inner tube 3 can increase, because the lateral wall of inner tube 3 is rugged, the contact of the lateral wall that has increased inner tube 3 and circulation gas, the gas of circulation just can be taken away the heat of inner tube 3, just so can make the inside heat dispersion of inner tube 3 rapider, make the inside temperature of inner tube 3 cool off fast, then increased motor 7's life.
Specifically, the main noise of the device comes from the position where the fan blade 8 contacts with the air flow, so that a circle of annular silencing groove 27 is formed in the annular wall, close to the fan blade 8, in the air guide pipe 2, a plurality of fins 23 are connected to three groove walls of the silencing groove 27, the fins 23 form a larger surface area, a suction effect can be achieved, a layer of asbestos 25 wraps the outside of the silencing groove 27, the noise is further reduced, and the silencing device is fixedly installed in a closed mode through an aluminum plate 24.
In addition, in order to prevent sundries from entering the device, the end parts of the air guide pipes 2 are movably connected with two semicircular closing covers 26 through hinged shafts, the steering engines can be installed on the hinged shafts and then are connected through cables to be controlled externally, when the device is opened, the closing covers are opened, one ends, far away from the base barrel 1, of the air guide pipes 2 are fixedly connected with protective nets 12 through bolts, the protective nets 12 cover the outer ends of the two air guide pipes 2, and therefore foreign matters are prevented from entering the device.
The working principle is as follows: during installation, the air guide pipe 2 and the air collecting pipe 21 are fixedly connected to two ends of the base barrel 1 through bolts, the fixing block 15 is fixedly connected to the side wall of the top of a tunnel through expansion bolts, then the base barrel 1 is fixed through the hoop 14, the stud 17 is screwed into the sleeve rod 16, the connecting rod 19 is rotated by rotating the stud 17, the lower end of the connecting rod 19 generates upward pulling or downward pressing acting force on the air guide pipe 2, the device is rotated around the rotating point of the hoop 14 and the fixing block 15, and then the device is adjusted to be horizontal to the tunnel, and the device is installed; when the device is used, the motor 7 is started to enable the fan blades 8 to rotate, so that gas can enter from the right end of the device and then flows along the guide cone 5, and the gas can rapidly circulate between the base barrel 1 and the inner barrel 3 and rapidly blow to a tunnel entrance from the left end, so that air circulation is realized; and when the fan blade 8 works, the atomizing spray head 11 sprays water to the inside of the left end silencer 2, and the sprayed water can be blown out of the device by the fan blade 8, so that the air humidity inside the tunnel is increased, the floating dust in the tunnel is reduced, and the normal operation of construction is facilitated.
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.
Claims (1)
1. The utility model provides a tunnel fan for tunnel construction, includes a base section of thick bamboo (1), its characterized in that: the left end and the right end of the base barrel (1) are respectively connected with an air guide pipe (2) and an air collecting pipe (21), the inner side wall of the air guide pipe (2) and the air collecting pipe (21) is arranged in a conical inclined plane, the side wall of the air guide pipe (2) is fixedly connected with a water pipe (10), the inner end of the water pipe (10) is fixedly connected with a spray head (11), and the joint of the air collecting pipe (21) and the base cylinder (1) is clamped with a dust cover (9), an inner barrel (3) is sleeved in the base barrel (1), a plurality of supporting plates (4) are fixedly connected to the outer side wall of the inner barrel (3), a diversion cone (5) is fixedly connected to the right end of the inner barrel (3), the right end of the diversion cone (5) penetrates through the dust cover (9) and extends to the interior of the wind collecting pipe (21), a motor (7) is fixedly arranged in the inner barrel (3), and an output shaft of the motor (7) is fixedly connected with a plurality of fan blades (8);
the outer side wall of the base barrel (1) is provided with a ring groove (13), a hoop (14) is sleeved inside the ring groove (13), the upper end of the hoop (14) is rotatably connected with a fixed block (15), and the fixed block (15) is fixedly connected with the side wall of the top of the tunnel through an expansion bolt;
the inner side wall of the air guide pipe (2) is provided with a rotary flow guide pattern (22) which enables the blown air flow to have a spiral motion form and enables the air flow to be farther;
the outer side wall of the diversion cone (5) is provided with rotary diversion lines (22) to enable air to flow to have a self-spinning effect and improve the kinetic energy of air flow;
the taper of the inner side wall of the air guide pipe (2) enables the internal water to flow out along the inclined plane;
a loop bar (16) is fixedly connected to the right side wall of the fixed block (15), a stud (17) is connected to the interior of the loop bar (16) in a meshed mode, a ring block (18) is rotatably sleeved on the side wall of the stud (17), a connecting rod (19) is rotatably connected to the lower end of the ring block (18), a hoop strip (20) is rotatably connected to the lower end of the connecting rod (19), the hoop strip (20) is fixedly welded to the outer side wall of the air collecting pipe (21), and the ring block (18) and the stud (17) are screwed tightly through a fixing screw; the inner diameter of the closed hoop (14) is matched with the diameter of the ring groove (13), the lower end of the hoop (14) is provided with an opening, and two sides of the hoop (14) can be opened by rotating outwards from the opening;
the taper inclination of the inner side wall of the air guide pipe (2) is between 2 and 5 degrees, and the taper inclination of the inner side wall of the air collecting pipe (21) is between 10 and 15 degrees;
a plurality of air holes (6) are formed at the connecting part of the flow guide cone (5) and the inner cylinder (3), and the inner cylinder (3) is connected with a motor (7) through a plurality of cross bars arranged on the inner wall of the inner cylinder;
the inner side wall of the air guide pipe (2) and the outer side wall of the guide cone (5) are provided with rotary guide lines (22);
a circle of annular silencing groove (27) is formed in the annular wall, close to the fan blades (8), in the air guide pipe (2), three groove walls of the silencing groove (27) are connected with a plurality of fin plates (23), and a layer of asbestos (25) is wrapped outside the silencing groove (27) through an aluminum plate (24);
the end part of the air guide pipe (2) is movably connected with two semicircular closing covers (26) through a hinged shaft, and one end of the air collecting pipe (21) far away from the base barrel (1) is fixedly connected with a protective net (12) through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910435522.7A CN110043306B (en) | 2019-05-23 | 2019-05-23 | Tunnel fan for tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910435522.7A CN110043306B (en) | 2019-05-23 | 2019-05-23 | Tunnel fan for tunnel construction |
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| CN110043306A CN110043306A (en) | 2019-07-23 |
| CN110043306B true CN110043306B (en) | 2021-07-09 |
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| CN201910435522.7A Active CN110043306B (en) | 2019-05-23 | 2019-05-23 | Tunnel fan for tunnel construction |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110848154A (en) * | 2019-10-19 | 2020-02-28 | 徐州康翔精密制造有限公司 | Subway energy-saving fan |
| CN112554945B (en) * | 2020-11-19 | 2023-05-09 | 浙江上风高科专风实业股份有限公司 | Shoulder pole beam anti-drop multiple protection anti-seismic hanger |
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| CN101249353A (en) * | 2008-04-02 | 2008-08-27 | 王君 | Cooking fume purifier |
| CN201740354U (en) * | 2010-07-23 | 2011-02-09 | 宝山钢铁股份有限公司 | Two-stage independent air intake device for steel pipe surface water removal |
| CN203759947U (en) * | 2014-03-05 | 2014-08-06 | 张风吉 | Experimental device for demonstrating energy conversion |
| CN204564570U (en) * | 2015-04-21 | 2015-08-19 | 哈尔滨博深科技发展有限公司 | Dynamic rotary separator guider |
| CN205667908U (en) * | 2016-06-12 | 2016-11-02 | 河北鑫星调压器有限公司 | The novel Whirlwind cyclone of cyclonic separation |
| CN205995206U (en) * | 2016-08-11 | 2017-03-08 | 天津宋泽环保节能科技有限公司 | Two section type high-efficiency wet-type dust collector |
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| CN110043306A (en) | 2019-07-23 |
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