CN109518622A - A kind of freeway tunnel safety device - Google Patents
A kind of freeway tunnel safety device Download PDFInfo
- Publication number
- CN109518622A CN109518622A CN201811421730.3A CN201811421730A CN109518622A CN 109518622 A CN109518622 A CN 109518622A CN 201811421730 A CN201811421730 A CN 201811421730A CN 109518622 A CN109518622 A CN 109518622A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- sleeve
- bottom end
- protective housing
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims 1
- 206010039203 Road traffic accident Diseases 0.000 abstract description 4
- 206010057855 Hypotelorism of orbit Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/08—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/08—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks
- E01F15/088—Details of element connection
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
- E01F9/615—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings illuminated
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a kind of freeway tunnel safety devices, including tunnel wall, the two sides tunnel wall body Nei Bi are uniformly fixedly installed with multiple protective housings respectively, protective housing bottom end is fixedly connected with water tank top, water tank one end is fixedly connected with wall in tunnel wall body, multiple protective housing tops are fixedly connected with top plate, multiple exhaust smoke holes are fixed on top plate, top plate bottom end is uniformly fixedly installed with multiple headlamps, the impact force when present apparatus hits the present apparatus by reducing automobile using rubber slab and buffer spring, mitigate to hit and be damaged caused by driver, and baffle ring one end is stuck in by multiple second slide bars, open warning lamp switch simultaneously in this way, pump switch and fan switches, the dense smoke generated when traffic accident being occurred in this way, it is on fire etc. to be discharged and put out, it ensure that the gas safety in tunnel, and warning lamp can be with The vehicle in entire tunnel is prompted rapidly, vehicle is avoided to collide again, causes subsequent loss.
Description
Technical field
The present invention relates to Road Tunnel Safety fields, and in particular to a kind of freeway tunnel safety device.
Background technique
As vehicle is more and more, the trip of people is more convenient, but car accident incidence is also more and more, especially
During freeway tunnel traveling, often since two vehicles traveling hypotelorism causes to have a car accident, and front occurs
When traffic accident, behind vehicle cannot be given in time and warned, cause subsequent bigger injures and deaths or economic loss, and once send out
Raw traffic accident, there may be the situations such as explosion, on fire, dense smoke in tunnel, cause very greatly to the traveling of other vehicles in tunnel
Influence, consequence is extremely serious.
Summary of the invention
To solve the above problems, the present invention provides a kind of freeway tunnel safety device.
The present invention is achieved through the following technical solutions:
A kind of freeway tunnel safety device, including tunnel wall, it is characterised in that: the two sides tunnel wall body Nei Bi
Uniformly be fixedly installed with multiple protective housings respectively, the protective housing bottom end is fixedly connected with water tank top, described water tank one end with
Wall is fixedly connected in tunnel wall body, and multiple protective housing tops are fixedly connected with top plate, and multiple smoke evacuations are fixed on the top plate
Hole, the top plate bottom end are uniformly fixedly installed with multiple headlamps, and the top plate bottom end is uniformly fixedly installed with multiple warning lamps,
The warning lamp is arranged alternately with headlamp, and the top plate top is fixedly installed with mounting rack, and the mounting rack is arc-shaped, described
Mounting rack bottom end is fixedly installed with exhaust fan, and described protective housing one end is welded with chamber door, and the chamber door side is fixedly installed with gear
Ring, inserted with sliding bar on the chamber door, described sliding bar one end is fixedly connected with buffer board one end, the buffer board other end
It is fixedly connected with rubber slab one end, the sliding bar other end, which passes through baffle ring and protrudes into fix in protective housing with fixed plate side, to be connected
It connects, buffer spring is cased on the sliding bar, for the buffer spring between chamber door and buffer board, the sliding bar annular is equal
A plurality of cavities are equipped with, annular is uniformly provided with multiple sliding slots on the sliding bar, and the sliding slot is communicated with cavity, in the sliding slot
Slidably connect the second slide bar, second slide bar bottom end shape spherical in shape, second top end of sliding rod protrude into second sleeve with
Second sliding block bottom end is fixedly connected, and second sliding block is slidably connected with second sleeve, in the second sleeve top and cavity
Top surface is fixedly connected, and second spring is equipped in the second sleeve, the second spring top is fixed with second sleeve inner top surface
Connection, the second spring bottom end are fixedly connected with the second sliding block top, and the fixed plate top and bottom end side are respectively symmetrically
It is fixedly connected with the first slide bar, first slide bar one end is protruded into first sleeve and is fixedly connected with first sliding block one end, described
First sliding block is slidably connected with first sleeve, and described first sleeve one end is fixedly connected with protection chamber interior wall side, and described first
The first spring is equipped in sleeve, first spring one end is fixedly connected with first sleeve inner wall side, and first spring is another
One end is fixedly connected with first sliding block one end, and the fixed plate side is uniformly fixedly connected there are three mandril, and three mandrils are another
End is fixedly connected with warning lamp switch, pump switch and fan switches one end respectively, the warning lamp switch, pump switch and
Fan switches are fixedly mounted on protection chamber interior wall side, and the warning lamp switch, pump switch and fan switches are at two
Between first sleeve, it is fixedly connected with multiple hollow stems between two adjacent protective housings, passes through connecting tube between two hollow stems
It is fixedly connected and communicates with water tank, it is fixedly embedded on the hollow stem to have multiple high-pressure nozzles.
Preferably, multiple water pumps are fixed in the water tank, water pump uses high-voltage electric hydraulic test pump.
Preferably, between the adjacent protective housing distance between 0.8m-1m.
Preferably, the protective housing is fixedly connected by welding with tunnel wall.
Preferably, the quantity in the warning lamp and the same row of headlamp is respectively no less than six.
Preferably, the warning lamp switch, pump switch and fan switches pass through cable and electrically connect with extraneous power supply
It connects.
Compared with prior art, the beneficial effects of the present invention are: the present apparatus using rubber slab and buffer spring by being reduced
Automobile hits the impact force when present apparatus, mitigates to hit and damage caused by driver, and is stuck in by multiple second slide bars
Warning lamp switch, pump switch and fan switches are opened in baffle ring one end simultaneously in this way, and what is generated when traffic accident occurring in this way is dense
Cigarette, it is on fire etc. to be discharged and put out, it ensure that the gas safety in tunnel, and warning lamp can prompt rapidly entire tunnel
Interior vehicle, avoids vehicle from colliding again, causes subsequent loss.
Detailed description of the invention
Fig. 1 is the main view of structure of the present invention；
Fig. 2 is the top view of structure of the present invention；
Fig. 3 is the cross-sectional view of structural shielding case of the present invention；
Fig. 4 is the main view of structure hollow stem of the present invention.
In figure: tunnel wall 1, protective housing 2, water tank 3, buffer board 4, rubber slab 5, top plate 6, headlamp 7, exhaust smoke hole 8, peace
Shelve 9, exhaust fan 10, hollow stem 11, chamber door 12, buffer spring 13, baffle ring 14, warning lamp switch 15, pump switch 16, air draft
Fan switch 17, first sleeve 18, the first spring 19, the first sliding block 20, the first slide bar 21, fixed plate 22, cavity 23, sliding slot 24,
Second sleeve 25, second spring 26, the second sliding block 27, the second slide bar 28, connecting tube 29, high-pressure nozzle 30, warning lamp 31, mandril
32, sliding bar 33.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
As shown in Figure 1, Figure 2, Figure 3, Figure 4, including tunnel wall 1, it is characterised in that: 1 inner wall two sides of the tunnel wall difference
Uniformly be fixedly installed with multiple protective housings 2,2 bottom end of protective housing is fixedly connected with 3 top of water tank, described 3 one end of water tank with
Wall 1 inner wall in tunnel is fixedly connected, and multiple 2 tops of protective housing are fixedly connected with top plate 6, is fixed on the top plate 6 multiple
Exhaust smoke hole 8,6 bottom end of top plate are uniformly fixedly installed with multiple headlamps 7, and 6 bottom end of top plate is uniformly fixedly installed with more
A warning lamp 31, the warning lamp 31 are arranged alternately with headlamp 7, and 6 top of top plate is fixedly installed with mounting rack 9, described
Mounting rack 9 is arc-shaped, and 9 bottom end of mounting rack is fixedly installed with exhaust fan 10, and described 2 one end of protective housing is welded with chamber door 12,
12 side of chamber door is fixedly installed with baffle ring 14, inserted with sliding bar 33 on the chamber door 12, described 33 one end of sliding bar with
4 one end of buffer board is fixedly connected, and 4 other end of buffer board is fixedly connected with 5 one end of rubber slab, 33 other end of sliding bar
It is fixedly connected across baffle ring 14 and protruding into protective housing 2 with 22 side of fixed plate, is cased with buffer spring 13 on the sliding bar 33,
For the buffer spring 13 between chamber door 12 and buffer board 4,33 annular of sliding bar is equipped with a plurality of cavities 23, described
Annular is uniformly provided with multiple sliding slots 24 on sliding bar 33, and the sliding slot 24 is communicated with cavity 23, is slidably connected in the sliding slot 24
Have the second slide bar 28,28 bottom end of the second slide bar shape spherical in shape, 28 top of the second slide bar protrude into second sleeve 25 with
Second sliding block, 27 bottom end is fixedly connected, and second sliding block 27 is slidably connected with second sleeve 25,25 top of second sleeve
It is fixedly connected with 23 inner top surface of cavity, is equipped with second spring 26 in the second sleeve 25,26 top of second spring and the
Two sleeves, 25 inner top surface is fixedly connected, and 26 bottom end of second spring is fixedly connected with 27 top of the second sliding block, the fixed plate
22 tops and bottom end side are respectively symmetrically fixedly connected with the first slide bar 21, and first sleeve 18 is protruded into described first slide bar, 21 one end
Interior to be fixedly connected with 20 one end of the first sliding block, first sliding block 20 is slidably connected with first sleeve 18, the first sleeve 18
One end is fixedly connected with 2 inner wall side of protective housing, is equipped with the first spring 19, first spring 19 1 in the first sleeve 18
End is fixedly connected with 18 inner wall side of first sleeve, and 19 other end of the first spring is fixedly connected with 20 one end of the first sliding block,
22 side of fixed plate is uniformly fixedly connected there are three mandril 32, three 32 other ends of mandril respectively with warning lamp switch 15,
Pump switch 16 is fixedly connected with 17 one end of fan switches, the warning lamp switch 15, pump switch 16 and fan switches
17 are fixedly mounted on 2 inner wall side of protective housing, and the warning lamp switch 15, pump switch 16 and fan switches 17 are at two
Between one sleeve 18, it is fixedly connected with multiple hollow stems 11 between two adjacent protective housings 2, passes through company between two hollow stems 11
Adapter tube 29 is fixedly connected and communicates with water tank 3, fixedly embedded on the hollow stem 11 to have multiple high-pressure nozzles 30.
Multiple water pumps are fixed in the water tank 3, water pump uses high-voltage electric hydraulic test pump.
Distance is between 0.8m-1m between the adjacent protective housing 2.
The protective housing 2 is fixedly connected by welding with tunnel wall 1.
Quantity in the warning lamp 31 and the same row of headlamp 7 is respectively no less than six.
The warning lamp switch 15, pump switch 16 and fan switches 17 are electrically connected by cable and extraneous power supply
It connects.
Working principle: the present apparatus is installed in 1 wall inner wall two sides of tunnel wall first, between two neighboring protective housing 2
Distance will turn on the power supply of headlamp 7 between 0.8m-1m, this ensure that in tunnel vehicle normally travel, when touching
When hitting, due to narrow terrain, vehicle can hit protective housing 2, and the rubber slab 5 on such buffer board 4 can play first layer buffering
Protection, covers the buffer spring 13 on sliding bar 33 and plays second layer buffer protection, alleviates collision in this way to the wound of driver
Evil, and then moves inward sliding bar 33, opens warning lamp switch simultaneously by three mandrils 32 in fixed plate 22 in this way
15, pump switch 16 and fan switches 17 can by the first internal spring 19 because there are two first sleeves 18 for setting
Slow down impact force, avoids warning lamp switch 15, pump switch 16 and fan switches 17 from receiving damage, at this moment due to sliding bar 33
Sliding, the second spring 26 in second sleeve 25 starts to stretch at this time, and the second slide bar 28 in sliding slot 24 skids off, and second
28 top of slide bar is set as spherical so that it is convenient to which skidding off for the second slide bar 28, in this way blocks sliding bar 33, ensure that can
Lasting warning lamp switch 15, pump switch 16 and fan switches 17, the such warning lamp 31 opened can be reminded in tunnel in time
Vehicle accident occurs, avoid secondary damage, and the exhaust fan 10 on mounting rack 9 can help in tunnel generate smog
It is discharged, the high-pressure nozzle 30 on hollow stem 11 can put out fire source, reduce more property losses and accident further aggravates.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (6)
1. a kind of freeway tunnel safety device, including tunnel wall (1), it is characterised in that: the tunnel wall (1)
Inner wall two sides are uniformly fixedly installed with multiple protective housings (2) respectively, the fixed company in protective housing (2) bottom end and water tank (3) top
It connects, described water tank (3) one end is fixedly connected with tunnel wall (1) inner wall, and multiple protective housing (2) tops are fixedly connected with top plate
(6), it is fixed with multiple exhaust smoke holes (8) on the top plate (6), top plate (6) bottom end is uniformly fixedly installed with multiple illuminations
Lamp (7), top plate (6) bottom end are uniformly fixedly installed with multiple warning lamps (31), and the warning lamp (31) and headlamp (7) are handed over
For setting, top plate (6) top is fixedly installed with mounting rack (9), and the mounting rack (9) is arc-shaped, mounting rack (9) bottom
End is fixedly installed with exhaust fan (10), and described protective housing (2) one end is welded with chamber door (12), the fixed peace in chamber door (12) side
Equipped with baffle ring (14), inserted with sliding bar (33), described sliding bar (33) one end and buffer board (4) one end on the chamber door (12)
It is fixedly connected, buffer board (4) other end is fixedly connected with rubber slab (5) one end, and sliding bar (33) other end passes through
Baffle ring (14) and protruding into protective housing (2) is fixedly connected with fixed plate (22) side, is cased with buffering elastic on the sliding bar (33)
Spring (13), between chamber door (12) and buffer board (4), sliding bar (33) annular is equipped with the buffer spring (13)
A plurality of cavities (23), annular is uniformly provided with multiple sliding slots (24) on the sliding bar (33), the sliding slot (24) and cavity (23)
It communicates, slidably connects the second slide bar (28) in the sliding slot (24), the second slide bar (28) bottom end shape spherical in shape, described the
Two slide bars (28) top is protruded into second sleeve (25) and is fixedly connected with the second sliding block (27) bottom end, second sliding block (27) and
Second sleeve (25) is slidably connected, and second sleeve (25) top is fixedly connected with cavity (23) inner top surface, and described second set
Second spring (26) are equipped in cylinder (25), second spring (26) top is fixedly connected with second sleeve (25) inner top surface, institute
It states second spring (26) bottom end to be fixedly connected with the second sliding block (27) top, fixed plate (22) top and bottom end side difference
It is symmetrically fixedly connected with the first slide bar (21), described first slide bar (21) one end is protruded into first sleeve (18) and the first sliding block
(20) one end is fixedly connected, and first sliding block (20) is slidably connected with first sleeve (18), described first sleeve (18) one end
It is fixedly connected with protective housing (2) inner wall side, is equipped with the first spring (19) in the first sleeve (18), first spring
(19) one end is fixedly connected with first sleeve (18) inner wall side, the first spring (19) other end and the first sliding block (20) one
End is fixedly connected, and fixed plate (22) side is uniformly fixedly connected there are three mandril (32), and three mandril (32) other ends divide
It is not fixedly connected with warning lamp switch (15), pump switch (16) and fan switches (17) one end, the warning lamp switch
(15), pump switch (16) and fan switches (17) are fixedly mounted on protective housing (2) inner wall side, the warning lamp switch
(15), pump switch (16) and fan switches (17) are between two first sleeves (18), between two adjacent protective housings (2)
It is fixedly connected with multiple hollow stems (11), is fixedly connected simultaneously by connecting tube (29) with water tank (3) between two hollow stems (11)
It communicates, it is fixedly embedded on the hollow stem (11) to have multiple high-pressure nozzles (30).
2. a kind of freeway tunnel safety device according to claim 1, it is characterised in that: the water tank (3)
Multiple water pumps are inside fixed with, water pump uses high-voltage electric hydraulic test pump.
3. a kind of freeway tunnel safety device according to claim 1, it is characterised in that: the adjacent protection
Distance is between 0.8m-1m between case (2).
4. a kind of freeway tunnel safety device according to claim 1, it is characterised in that: the protective housing
(2) it is fixedly connected by welding with tunnel wall (1).
5. a kind of freeway tunnel safety device according to claim 1, it is characterised in that: the warning lamp
(31) and the quantity in headlamp (7) same row is respectively no less than six.
6. a kind of freeway tunnel safety device according to claim 1, it is characterised in that: the warning lamp is opened
(15), pump switch (16) and fan switches (17) are closed to be electrically connected by cable and extraneous power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421730.3A CN109518622A (en) | 2018-11-27 | 2018-11-27 | A kind of freeway tunnel safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421730.3A CN109518622A (en) | 2018-11-27 | 2018-11-27 | A kind of freeway tunnel safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109518622A true CN109518622A (en) | 2019-03-26 |
Family
ID=65794289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811421730.3A Pending CN109518622A (en) | 2018-11-27 | 2018-11-27 | A kind of freeway tunnel safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109518622A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295944A (en) * | 2019-07-12 | 2019-10-01 | 郭文 | Tunnel protection unit |
| CN111335935A (en) * | 2020-02-28 | 2020-06-26 | 柳友军 | Fire extinguishing device for underground coal mine |
| CN112647458A (en) * | 2020-09-23 | 2021-04-13 | 重庆市城投路桥管理有限公司 | BIM municipal bridge pier anti-collision device based on Internet of things |
-
2018
- 2018-11-27 CN CN201811421730.3A patent/CN109518622A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295944A (en) * | 2019-07-12 | 2019-10-01 | 郭文 | Tunnel protection unit |
| CN110295944B (en) * | 2019-07-12 | 2020-11-20 | 义乌市佳倩科技有限公司 | Tunnel protection unit |
| CN111335935A (en) * | 2020-02-28 | 2020-06-26 | 柳友军 | Fire extinguishing device for underground coal mine |
| CN112647458A (en) * | 2020-09-23 | 2021-04-13 | 重庆市城投路桥管理有限公司 | BIM municipal bridge pier anti-collision device based on Internet of things |
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Application publication date: 20190326 |