CN207963669U - The Bubble Heavy Curtain protective device of Blasting shock wave is obstructed for deep water conditions - Google Patents
The Bubble Heavy Curtain protective device of Blasting shock wave is obstructed for deep water conditions Download PDFInfo
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- CN207963669U CN207963669U CN201721516580.5U CN201721516580U CN207963669U CN 207963669 U CN207963669 U CN 207963669U CN 201721516580 U CN201721516580 U CN 201721516580U CN 207963669 U CN207963669 U CN 207963669U
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Abstract
The utility model is related to a kind of Bubble Heavy Curtain protective devices obstructing Blasting shock wave for deep water conditions.Its technical solution is：The Bubble Heavy Curtain protective device generates release device (1) by 1 ~ 5 high pressure gas and is made up of connecting tube (2) and gas injection tube (3) connection, or directly connect composition with gas injection tube (3).High pressure gas, which generates, is equipped with liquid gas (12) in the shell (13) of release device；The both ends of resistance wire (11) in shell (13) are correspondingly connected with by one end of two copper posts (8) and two conducting wires (5), and the other end of two conducting wires (5) is connect across sealing cover (6) with power supply (4)；Shell (13) is equipped with air intake valve (10)；High pressure gas connecting tube on the outside of shell (13) blind end is communicated with the cavity of shell (13), and the counterbore at cavity through-hole aperture is let out equipped with level pressure can piece (15).The utility model is simple in structure, at low cost and easily operated, in deep water, especially more notable to the barriering effect of Blasting shock wave under ultra-deep depth of water environment.
Description
Technical field
The utility model belongs to Bubble Heavy Curtain protective device.More particularly to one kind Blasting shock wave is obstructed for deep water conditions
Bubble Heavy Curtain protective device.
Background technology
Currently, underwater demolition is widely used in the numerous areas of national economy, as power station, port and pier, bridge are built
It makes, channel dredging waterborne and military protection etc., underwater demolition Study on Safety Problem is particularly important.Wherein, underwater demolition is rushed
Hit one of the main harm that wave is underwater demolition construction.Underwater demolition shock wave has the characteristics that the big propagation of amplitude is remote, to underwater
Construction of structures, construction personnel, fish etc. have strong harm.Bubble Heavy Curtain guard technology is at present to underwater demolition shock wave
Protect most direct and most effective means.Bubble Heavy Curtain guard technology is by being arranged together between blast area and protected object
" curtain " of bubble composition is a kind of method of simple and effective control underwater demolition harm as buffering barrier, which makes
Deep water, the coastal waters of big flow velocity and walrus complicated condition and the underwater demolition engineering near building are possibly realized.
Existing Bubble Heavy Curtain protective device is air to be passed through underwater steel pipe by gas-guide tube using air compressor machine, then pass through
Stomata on underwater steel pipe overflows to form Bubble Heavy Curtain for obstructing underwater demolition shock wave.By increasing throughput and increasing gas
The curtain number of plies is steeped to enhance barriering effect.By practical application, this device has good barriering effect.But with the depth of water
Increase, it is desirable that the output power of air compressor machine needs constantly to increase；Simultaneously the length of gas-guide tube is also required increasingly to grow, big distance
Delivery conduit also increase the difficulty of construction.Therefore, with the increase of the depth of water, the cost of existing Bubble Heavy Curtain protective device
Exponentially rise.In addition, powerful air compressor machine has distribution, transport, operating personnel etc. harsh requirement.
Invention content
The utility model is intended to exploitation prior art defect, and it is an object of the present invention to provide one kind is simple in structure, at low cost, is easy to grasp
The Bubble Heavy Curtain protective device that Blasting shock wave is obstructed for deep water conditions made and extraneous auxiliary equipment zero is required；Use this
Device is notable to the barriering effect of Blasting in deep water shock wave.
For the above-mentioned task of realization, the technical solution adopted in the utility model is：
The Bubble Heavy Curtain protective device for deep water conditions barrier Blasting shock wave generates by 2 ~ 5 high pressure gas-
Release device connects composition with gas injection tube by connecting tube；Or directly and gas by 1 high pressure gas generation-release device
Injection pipe connection composition.
High pressure gas generation-the release device includes shell, end cap, sealing cover, power supply and two conducting wires；Shell and end
Lid is threadedly coupled, and sealing ring is equipped between shell and two end faces of end cap.The center position of the end cap is opened in the axial direction
There are two wire through-hole, it is respectively provided with rubber-covered seal pipe in two wire through-holes, is respectively filled in two rubber-covered seal pipes
There is copper post, the both ends of resistance wire and the inner end of two copper posts to be separately connected, the outer ends of two copper posts respectively with two conducting wires one
End is correspondingly connected with；Sealing cover is fixed on the outside of the end cap, the other end of two conducting wires is passed through to be connect from sealing cover with power supply.
Liquid gas is housed in shell.
The shell is in hollow cylinder shape, and the open end of hollow cylinder is equipped with internal thread, close to the open end edge
Radial direction is equipped with air intake valve；High pressure gas connecting tube, the height are concentrically equipped on the outside of the blind end of hollow cylinder
The blind end of pressure gas connection pipe and hollow cylinder is integral, and the high pressure gas connecting tube is closed by hollow cylinder
The through-hole at end is communicated with the cavity of hollow cylinder；Counterbore is equipped at the through-hole aperture of cavity inner wall, the counterbore is by introversion
Outer let out equipped with level pressure can piece and threaded insert.
The connecting tube is that a puff prot passes through the gas-guide tube communication means in parallel with 2 ~ 5 air inlets；The 2 of connecting tube
~ 5 air inlets are connect with the high pressure gas connecting tube of corresponding high pressure gas generation-release device respectively, connecting tube
Puff prot is communicated with the air inlet of gas injection tube.
The pipe shaft of the gas injection tube is steel pipe, and one end of steel pipe is blind end, the jet port of the other end and connecting tube
Connection.Pipe shaft is equipped with two rows of spray-holes, and the arc length of the centreline space of two rows of spray-holes is the 1/6 ~ 1/4 of gas injection tube perimeter,
Two rows of spray-hole interlaced arrangements, spray-hole pitch-row are 50 ~ 100mm, and spray-hole aperture is 2 ~ 3mm.
The end cap is in the circular lid of " convex " shape, and round boss is equipped with external screw thread.
The liquid gas is liquid carbon dioxide or is liquid nitrogen.
The application method of Bubble Heavy Curtain protective device for deep water conditions barrier Blasting shock wave is：
Before use：It first selectes level pressure and lets out the energy specified pressure of piece；Liquid gas is pressed by valve in shell again, the liquid
State gas is liquefied carbon dioxide gas.Then the Bubble Heavy Curtain that Blasting shock wave is obstructed for deep water conditions is protected into dress
Placement location is placed on the waters between burst region and region to be protected, and the spray-hole of gas injection tube is upward when placement.
When use：According to the single structure of 1 high pressure gas generation-release device, 1 ~ 2s before the explosion of blast area is beaten
The controller of the power supply of high pressure gas generation-release device is opened, high pressure gas is by the launch hole (20) of gas injection tube in water
Middle formation Bubble Heavy Curtain；
According to the parallel-connection structure of 2 ~ 5 high pressure gas generation-release devices, 1 ~ 2s before the explosion of blast area opens the 1st
The controller of the power supply of a high pressure gas generation-release device, then opens the 2nd ~ 5th successively with the interval time of 2 ~ 10s
The controller of the power supply of high pressure gas generation-release device, high pressure gas by the launch hole (20) of gas injection tube in water
Form continuous Bubble Heavy Curtain.
Due to the adoption of the above technical scheme, the utility model has following good effect compared with prior art：
First, the utility model has small, structure relative to air compressor machine used in existing Bubble Heavy Curtain protective device
The characteristics of simply and being readily transported；
Second, the utility model uses liquid gas, when the control for the power supply for opening high pressure gas generation-release device
Device, the resistance wire fever in shell, liquefied gas vapo；Air pressure after gasification, which rises to when level pressure lets out the specified pressure of energy piece, to be determined
Pressure is let out energy piece and is rushed to open, and high pressure gas is directly entered gas by the high pressure gas that connecting tube enters in gas injection tube or shell
Body injection pipe；The bubble phase that gasification generates is for existing Bubble Heavy Curtain protective device by the acting of air compressor machine generates bubble
Speech cost is greatly lowered；
Third, the utility model can realize far distance controlled Bubble Heavy Curtain by increasing conductor length, relatively existing
Bubble Heavy Curtain protective device needs have many advantages, such as flexible, good operability, at low cost by lengthening for gas-guide tube；
4th, the utility model only needs that powerup issue can be realized by portable power, relative to existing bubble
Curtain protective device need be equipped with three-phase voltage for have the characteristics that it is at low cost, extraneous auxiliary equipment zero is required；
5th, in deepwater regions operation, the specified pressure that the utility model can directly let out energy piece by raising level pressure is light
Reach tens megapascal, to be overflowed conducive to bubble, the maximum power air compressor machine relative to existing Bubble Heavy Curtain protective device is only
It is not only at low cost for ten megapascal or less can be reached and more notable to the barriering effect of Blasting in deep water shock wave.
Therefore, the utility model has spy that is simple in structure, at low cost, easily operated and requiring extraneous auxiliary equipment zero
Point, deep water, particularly under ultra-deep depth of water environment it is more notable to the barriering effect of Blasting shock wave.
Description of the drawings：
Fig. 1 is a kind of structural schematic diagram of the utility model；
Fig. 2 is another structural schematic diagram of the utility model；
Fig. 3 is the enlarged diagram of high pressure gas generation-release device 1 in Fig. 1 and Fig. 2；
Fig. 4 is 3 structural schematic diagram of gas injection tube in Fig. 1 and Fig. 2；
Fig. 5 is the close-up schematic view of I in Fig. 3.
Specific implementation mode
The utility model will be further described with reference to the accompanying drawings and detailed description, not to its protection domain
Limitation.
Embodiment 1
A kind of Bubble Heavy Curtain protective device for deep water conditions barrier Blasting shock wave.Bubble curtain described in the present embodiment
Curtain protective device is as shown in Figure 1：Pass through 3 connection group of connecting tube 2 and gas injection tube by 3 high pressure gas generation-release devices 1
At.
High pressure gas generation-the release device 1 is as described in Figure 3：Including shell 13, end cap 7, sealing cover 6,4 and of power supply
Two conducting wires 5.Shell 13 is threadedly coupled with end cap 7, and sealing ring is equipped between shell 13 and two end faces of end cap 7.Such as Fig. 3 and figure
Shown in 5, the center position of the end cap 7 is opened in the axial direction there are two wire through-hole, is respectively provided in two wire through-holes
Rubber-covered seal pipe 9, is respectively equipped with copper post 8 in two rubber-covered seal pipes 9, the both ends of resistance wire 11 and two copper posts 8
Inner end is separately connected, and the one end of the outer ends of two copper posts 8 respectively with two conducting wires 5 is correspondingly connected with；The outside of the end cap 7 is fixed
There is sealing cover 6, the other end of two conducting wires 5 is passed through to be connect from sealing cover 6 with power supply 4.
As shown in figure 3, the shell 13 is in hollow cylinder shape, the open end of hollow cylinder is equipped with internal thread, close
The open end is radially equipped with air intake valve 10；High pressure gas is concentrically equipped on the outside of the blind end of hollow cylinder
The blind end of connecting tube, the high pressure gas connecting tube and hollow cylinder is integral, and the high pressure gas connecting tube passes through
The through-hole of hollow cylinder blind end is communicated with the cavity of hollow cylinder；Counterbore is equipped at the through-hole aperture of cavity inner wall,
The counterbore is let out equipped with level pressure from inside to outside can piece 15 and threaded insert 14.
As shown in Figure 1, the connecting tube 2 is the dress that a puff prot is communicated by gas-guide tube with 3 air inlets in parallel
It sets；3 air inlets of connecting tube 2 connect with the high pressure gas connecting tube of corresponding high pressure gas generation-release device 1 respectively
It connects, the puff prot of connecting tube 2 is communicated with the air inlet of gas injection tube 3.
As shown in figure 4, the pipe shaft of the gas injection tube 3 is steel pipe, one end of steel pipe is blind end, the other end with connect
The jet port of pipe 2 connects.Pipe shaft is equipped with two rows of spray-holes 16, and the gas arc length of the centreline space of two rows of spray-holes 16 is injection pipe
The 1/6 ~ 1/4 of 3 perimeters, 16 interlaced arrangement of two rows of spray-holes, 16 pitch-row of spray-hole be 50 ~ 100mm, 16 aperture of spray-hole be 2 ~
3mm。
The end cap 7 is in the circular lid of " convex " shape, and round boss is equipped with external screw thread.
The present embodiment obstructs the Bubble Heavy Curtain protective device of Blasting shock wave for underwater deep by described for deep water conditions
Degree is the reef blasting engineering of 50m, weakens underwater shock wave energy with Bubble Heavy Curtain, to protect neighbouring abalone culture field Mesichthyes
Safety.
Before use：It is 25MPa first to select level pressure and let out the energy specified pressure of piece；Liquid gas 12 is pressed into shell by valve 10 again
In body 13, the liquid gas is liquefied carbon dioxide gas.Then by described Blasting shock wave is obstructed for deep water conditions
Bubble Heavy Curtain protective device is placed on the waters between reef blast area and abalone culture field, the spray of gas injection tube 3 when placement
Perforation 16 is upward.
When use：1 ~ 2s before the explosion of blast area opens the control of the power supply 4 of the 1st high pressure gas generation-release device 1
Then device processed opens the power supply 4 of the 2nd and the 3rd high pressure gas generation-release device 1 successively with the interval time of 2 ~ 10s
Controller, high pressure gas form continuous Bubble Heavy Curtain by the launch hole 20 of gas injection tube 3, have significantly weakened reef in water
Impact of the shock wave that stone explosion generates to abalone culture field.
Embodiment 2
A kind of Bubble Heavy Curtain protective device for deep water conditions barrier Blasting shock wave.Deep water is used for described in the present embodiment
The Bubble Heavy Curtain protective device that condition obstructs Blasting shock wave is as shown in Figure 2：It is direct by 1 high pressure gas generation-release device 1
It connect composition with gas injection tube 3.
High pressure gas generation-the release device 1 and the gas injection tube 3 are as described in Example 1, and the present embodiment is no longer
It repeats.
The present embodiment obstructs the Bubble Heavy Curtain protective device of Blasting shock wave for underwater deep by described for deep water conditions
Degree is the cofferdam demolition blasting engineering of 10m, weakens underwater shock wave energy with generated Bubble Heavy Curtain, to protect neighboring piles
Safety.
Before use：It is 20MPa first to select level pressure and let out the energy specified pressure of piece；Liquid gas 12 is pressed into shell by valve 10 again
In body 13, the liquid gas is liquefied carbon dioxide gas.Then by described Blasting shock wave is obstructed for deep water conditions
Bubble Heavy Curtain protective device is placed on the waters between cofferdam blast area and neighboring piles to be protected, gas injection tube when placement
3 spray-hole 16 is upward.
When use：1 ~ 2s before the explosion of blast area opens the controller of the power supply 4 of high pressure gas generation-release device 1,
High pressure gas forms Bubble Heavy Curtain in water by the launch hole 20 of gas injection tube 3, effectively weakens Blasting in deep water shock wave
Impact to neighboring piles.
Embodiment 3
A kind of Bubble Heavy Curtain protective device for deep water conditions barrier Blasting shock wave.Deep water is used for described in the present embodiment
The Bubble Heavy Curtain protective device of condition barrier Blasting shock wave is passed through by 2,4 or 5 high pressure gas generation-release devices 1
Connecting tube 2 and the connection composition of gas injection tube 3.
High pressure gas generation-the release device 1 and the structure of the gas injection tube 3 are as described in Example 1, this implementation
Example repeats no more.
Connecting tube 2 described in the present embodiment is that a puff prot passes through the gas-guide tube air inlet phase in parallel with 2,4 or 5
Logical device；The high pressure of 24 of connecting tube 2 or 5 air inlets not with corresponding high pressure gas generation-release device 1
Gas connection pipe connects, and the puff prot of connecting tube 2 is communicated with the air inlet of gas injection tube 3.
The present embodiment obstructs the Bubble Heavy Curtain protective device of Blasting shock wave for underwater deep by described for deep water conditions
Degree is the submerged wreck Cutting Blasting of 200m, and underwater blast wave is slackened with generated Bubble Heavy Curtain, to protect underwater portion special
Different equipment.
Before use：It is 30MPa first to select level pressure and let out the energy specified pressure of piece；Liquid gas 12 is pressed into shell by valve 10 again
In body 13, the liquid gas is two nitrogen of liquid.Then by the bubble curtain for obstructing Blasting shock wave for deep water conditions
Curtain protective device is placed on submerged wreck Cutting Blasting and takes waters between special protection equipment, gas injection tube 3 when placement
Spray-hole 16 upward.
When use：1 ~ 2s before the explosion of blast area opens the control of the power supply 4 of the 1st high pressure gas generation-release device 1
Device processed, then with the interval time of 2 ~ 10s open the 2nd or with the 2nd ~ 4th is opened when the interval of 2 ~ 10s successively or with 2 ~
The controller of the power supply 4 of the 2nd ~ 5th high pressure gas generation-release device 1, high pressure gas pass through gas successively when the interval of 10s
The launch hole 20 of body injection pipe 3 forms continuous Bubble Heavy Curtain in water, has significantly obstructed Blasting in deep water shock wave to underwater special
The impact of different protection equipment.
Present embodiment has following good effect compared with prior art：
First, present embodiment relative to air compressor machine used in existing Bubble Heavy Curtain protective device have it is small,
It is simple in structure and the characteristics of be readily transported；
Second, present embodiment uses liquid gas, when the power supply 4 for opening high pressure gas generation-release device
Controller, the resistance wire 11 in shell 13 generate heat, and liquid gas 12 gasifies；Air pressure after gasification rises to level pressure and lets out energy piece 15
Level pressure is let out energy piece 15 and is rushed to open when specified pressure, and high pressure gas is entered by connecting tube 2 in gas injection tube 3 or shell 13
High pressure gas is directly entered gas injection tube 3；The bubble phase that gasification generates passes through sky for existing Bubble Heavy Curtain protective device
Cost is greatly lowered for the acting of press generates bubble；
Third, present embodiment can realize far distance controlled Bubble Heavy Curtain by increasing conductor length, relatively existing
Some Bubble Heavy Curtain protective devices needs have many advantages, such as flexible, good operability, at low cost by lengthening for gas-guide tube；
4th, present embodiment only needs that power supply supply problem can be realized by portable power, relative to existing
Some Bubble Heavy Curtain protective devices need to be equipped with for three-phase voltage with spy that is at low cost, requiring extraneous auxiliary equipment zero
Point；
5th, in deepwater regions operation, present embodiment can directly let out the specified pressure of energy piece 15 by improving level pressure
Tens megapascal are easily reached by force, to be overflowed conducive to bubble, the maximum power relative to existing Bubble Heavy Curtain protective device is empty
It is not only at low cost for press can only achieve ten megapascal or less and more notable to the barriering effect of Blasting in deep water shock wave.
Therefore, present embodiment has simple in structure, at low cost, easily operated and requires extraneous auxiliary equipment zero
The characteristics of, deep water, particularly under ultra-deep depth of water environment it is more notable to the barriering effect of Blasting shock wave.
Claims (3)
1. a kind of Bubble Heavy Curtain protective device for deep water conditions barrier Blasting shock wave, it is characterised in that the Bubble Heavy Curtain
Protective device is made up of 2 ~ 5 high pressure gas generations-release device (1) connecting tube (2) and gas injection tube (3) connection；
Or it is directly connect and is formed with gas injection tube (3) by 1 high pressure gas generation-release device (1)；
The high pressure gas generation-release device (1) includes shell (13), end cap (7), sealing cover (6), power supply (4) and two
Conducting wire (5)；Shell (13) is threadedly coupled with end cap (7), and sealing ring is equipped between shell (13) and two end faces of end cap (7)；Institute
The center position for stating end cap (7) is opened in the axial direction there are two wire through-hole, and it is exhausted to be respectively provided with rubber in two wire through-holes
Edge seal pipe (9), two rubber-covered seal pipes (9) are interior to be respectively equipped with copper post (8), the both ends of resistance wire (11) and two copper posts
(8) inner end is separately connected, and the one end of the outer ends of two copper posts (8) respectively with two conducting wires (5) is correspondingly connected with；The end cap
(7) sealing cover (6) is fixed on the outside of, the other end of two conducting wires (5) is passed through to be connect from sealing cover (6) with power supply (4)；
Liquid gas (12) is housed in shell (13)；
The shell (13) is in hollow cylinder shape, and the open end of hollow cylinder is equipped with internal thread, close to the open end edge
Radial direction is equipped with air intake valve (10)；High pressure gas connecting tube, institute are concentrically equipped on the outside of the blind end of hollow cylinder
The blind end for stating high pressure gas connecting tube and hollow cylinder is integral, and the high pressure gas connecting tube passes through hollow cylinder
The through-hole of blind end is communicated with the cavity of hollow cylinder；At the through-hole aperture of cavity inner wall be equipped with counterbore, the counterbore by
Being let out from inside to outside equipped with level pressure can piece (15) and threaded insert (14)；
The connecting tube (2) is the device that a puff prot is communicated by gas-guide tube with 2 ~ 5 air inlets in parallel；Connecting tube
(2) 2 ~ 5 air inlets are connect with the high pressure gas connecting tube of corresponding high pressure gas generation-release device (1) respectively,
The puff prot of connecting tube (2) is communicated with the air inlet of gas injection tube (3)；
The pipe shaft of the gas injection tube (3) is steel pipe, and one end of steel pipe is blind end, the injection of the other end and connecting tube (2)
Mouth connection；Pipe shaft is equipped with two rows of spray-holes (16), and the arc length of the centreline space of two rows of spray-holes (16) is gas injection tube (3) week
Long 1/6 ~ 1/4, two rows of spray-hole (16) interlaced arrangements, spray-hole (16) pitch-row are 50 ~ 100mm, and spray-hole (16) aperture is 2
~3mm。
2. being used for the Bubble Heavy Curtain protective device of deep water conditions barrier Blasting shock wave according to claim 1, feature exists
It is in the circular lid of " convex " shape in the end cap (7), round boss is equipped with external screw thread.
3. being used for the Bubble Heavy Curtain protective device of deep water conditions barrier Blasting shock wave according to claim 1, feature exists
It is liquid carbon dioxide in the liquid gas or is liquid nitrogen etc..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721516580.5U CN207963669U (en) | 2017-11-14 | 2017-11-14 | The Bubble Heavy Curtain protective device of Blasting shock wave is obstructed for deep water conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721516580.5U CN207963669U (en) | 2017-11-14 | 2017-11-14 | The Bubble Heavy Curtain protective device of Blasting shock wave is obstructed for deep water conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207963669U true CN207963669U (en) | 2018-10-12 |
Family
ID=63724754
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721516580.5U Expired - Fee Related CN207963669U (en) | 2017-11-14 | 2017-11-14 | The Bubble Heavy Curtain protective device of Blasting shock wave is obstructed for deep water conditions |
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| Country | Link |
|---|---|
| CN (1) | CN207963669U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764146A (en) * | 2017-11-14 | 2018-03-06 | 武汉科技大学 | For obstructing the Bubble Heavy Curtain generating means and its application method of Blasting in deep water shock wave |
| CN111504131A (en) * | 2020-04-21 | 2020-08-07 | 广东中人岩土工程有限公司 | Carbon dioxide underwater blasting protection device |
| CN113324453A (en) * | 2021-06-21 | 2021-08-31 | 重庆交通大学 | Sea ditch reef blasting shock wave protection device with flexible drainage function |
-
2017
- 2017-11-14 CN CN201721516580.5U patent/CN207963669U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764146A (en) * | 2017-11-14 | 2018-03-06 | 武汉科技大学 | For obstructing the Bubble Heavy Curtain generating means and its application method of Blasting in deep water shock wave |
| CN111504131A (en) * | 2020-04-21 | 2020-08-07 | 广东中人岩土工程有限公司 | Carbon dioxide underwater blasting protection device |
| CN111504131B (en) * | 2020-04-21 | 2022-05-24 | 广东中人岩土工程有限公司 | Carbon dioxide underwater blasting protection device |
| CN113324453A (en) * | 2021-06-21 | 2021-08-31 | 重庆交通大学 | Sea ditch reef blasting shock wave protection device with flexible drainage function |
| CN113324453B (en) * | 2021-06-21 | 2022-12-23 | 重庆交通大学 | Sea ditch reef blasting shock wave protection device with flexible drainage function |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181012 Termination date: 20191114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |