CN208541969U - A kind of dust-free pulp shooting machine - Google Patents
A kind of dust-free pulp shooting machine Download PDFInfo
- Publication number
- CN208541969U CN208541969U CN201820980878.XU CN201820980878U CN208541969U CN 208541969 U CN208541969 U CN 208541969U CN 201820980878 U CN201820980878 U CN 201820980878U CN 208541969 U CN208541969 U CN 208541969U
- Authority
- CN
- China
- Prior art keywords
- dust
- pipe
- caliber
- pressure
- negative
- 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.)
- Expired - Fee Related
Links
- 239000000428 dust Substances 0.000 claims abstract description 154
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000002663 nebulization Methods 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 11
- 239000010865 sewage Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000889 atomisation Methods 0.000 description 9
- 239000007921 spray Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
The utility model discloses a kind of dust-free pulp shooting machines, including the dust gathering arrester being located on pulp shooting machine, the side of the lower end of the dust gathering arrester is provided with dust-extraction unit, the dust gathering arrester successively includes dust collection pipe from left to right, nebulization dust room, negative-pressure guide pipe, louvered dehydrator, water dust separation bin, exhaust pipe.Dust is removed by " Venturi effect " of dust-extraction unit, to realize environmental protection construction.
Description
Technical field
The utility model relates to build technical field of environment protection equipment more particularly to a kind of dust-free pulp shooting machine.
Background technique
Wet concrete sprayer is suitable for water conservancy, tunnel, dykes and dams, reinforces highway;National defence, coal, building, building etc.
One of engineering construction equipment, it utilizes compressed air or other power, and the concrete of mixing by a certain percentage is mixed
Object is vertically sprayed in by spray plane with higher speed along Pipeline transport to spray head, relies on cement and aggregate in course of injection
It is continuous to hit, densification and form a kind of concrete.In recent years, Wet-type concrete spraying technique, the good, rebound degree with its production efficiency
Low, dust pollution is light, good engineering quality, increasingly shows vigorous vitality in mew spray supporting construction.
Wherein, rotator type wet-spraying machine uses vertical straight material hole structure, and wet mix when work in hopper falls into rotor
Expect hole, material hole is communicated with compressed air inlet port after 180 ° of rotation, and wet mix is depressed into discharge nozzle with suspended state, is spraying
Mouth mixing chamber and liquid accelerator spray after being sufficiently mixed from nozzle at high speeds.But rotator type wet-spraying machine is when in use, rub rubber
Offset plate, upper and lower residual air mouth and feeding port can generate a large amount of dust, damage to the body of operator, and pollute atmosphere.
In order to remove dust, Chinese patent notification number is that CN206184185U discloses a kind of " removing rotator type pulp shooting machine
The wet dust separater of the dust of generation ", including the dust gathering arrester for covering rotator type pulp shooting machine, the bottom end of the back plate of dust gathering arrester
It is communicated with injection type wet scrubber, injection type wet scrubber successively includes inlet cylinder, compressed air inlet, spray from left to right
Hydrophone entrance, louvered dehydrator, dehydrating tube, escape pipe.In use, compression is empty in compressed air inlet by compressed air
Gas flows from left to right in injection type wet scrubber, to form negative pressure, so that the dust laden air collected in dust gathering arrester be inhaled
Enter into water jet, so that dust laden air is mixed with the water mist that water jet sprays, enters in louvered dehydrator after mixing, hundred
The water containing dust and pure air are separated using inertia dehydrated structure under the action of leaf formula dehydrator, the sewage containing dust
It is discharged from dehydrating tube, the compressed air being passed through is discharged from escape pipe.
But caliber mutation of the deduster of above-mentioned apparatus between inlet cylinder and compressed air inlet, so that negative pressure
It is undesirable to form effect, and the caliber between water jet entrance and louvered dehydrator is constant, can not form jet stream effect, thus
Reduce the dust removing effects of above-mentioned dust-extraction unit.
Summary of the invention
It is wet to solve rotator type in the prior art the purpose of this utility model is to provide a kind of dust-free pulp shooting machine
The undesirable problem of the dust removing effects of dust-extraction unit in spraying machine.
In order to solve the above technical problems, technical solution used by a kind of dust-free pulp shooting machine of the utility model is:
A kind of dust-free pulp shooting machine, including the dust gathering arrester being located on pulp shooting machine, the side of the lower end of the dust gathering arrester is set
It is equipped with dust-extraction unit, the dust gathering arrester successively includes from left to right
Dust collection pipe, the dust collection pipe are round table-like in right end is big, left end is small;
Nebulization dust room, the bottom of the nebulization dust room are disposed with high-pressure pipe, water inlet pipe, institute from left to right
The end for stating water inlet pipe is provided with atomizer;
The caliber of negative-pressure guide pipe, the negative-pressure guide pipe is first gradually reduced from left to right, is gradually increased again;
Louvered dehydrator;
Water dust separation bin, the water dust separation bin extend radially outward, and protrudes from louvered dehydrator, exhaust pipe
Outer peripheral surface, so that the recessed formation guiding gutter of the inner wall of water dust separation bin, the bottom of the guiding gutter is provided with sewage draining exit;
Exhaust pipe, the exhaust pipe is in the annular structure that inside and outside pipeline is formed, and the left end of interior conduit does not protrude from institute
State the left end of guiding gutter.
The left end of the Outer Tube of the exhaust pipe and the right end of the water dust separation bin are an integral molding structure, and the row
The right end of the Outer Tube of tracheae is provided with turn edge, and the right end of the interior conduit of the exhaust pipe is provided with to be adapted to the turn edge
Flange.
The top of the high-pressure pipe is located in nebulization dust room, and the top of the high-pressure pipe is provided with high pressure
Wind depression drainage device is provided at least two gas tips on the outer peripheral surface of the high-pressure blast depression drainage device;The water inlet pipe
It is in 90 ° of bend pipes positioned at the indoor part of nebulization dust, the right end of bend pipe is provided with atomizer, and the axial of the atomizer is thrown
Shadow is located in the axis projection of the high-pressure blast depression drainage device.
The caliber of the water inlet pipe is less than the caliber of the high-pressure pipe.
The caliber of the right end caliber of the dust collection pipe and the nebulization dust room, the nebulization dust room caliber with
The left end caliber of the negative-pressure guide pipe, the negative-pressure guide pipe left end caliber and the negative-pressure guide pipe right end caliber,
The caliber of the right end caliber of the negative-pressure guide pipe and the louvered dehydrator, the louvered dehydrator caliber with it is described
The caliber of exhaust pipe is equal.
It is the left end of the dust collection pipe and the dust gathering arrester, the nebulization dust room and the negative-pressure guide pipe, described
Negative-pressure guide pipe and the louvered dehydrator are to pass through flanged joint;The right end of the dust collection pipe is removed with the atomization
The left end of dirt room is welded to connect.
It is using the advantageous effects that the utility model generates: due to one end and the negative-pressure guide pipe phase of nebulization dust room
Even, the other end is connected by dust collection pipe with dust gathering arrester, using " Venturi effect " twice, by high-pressure pipe to atomization
In dirt pocket after conveying high-pressure gas, can in dust collection pipe in one end of dust gathering arrester, negative-pressure guide pipe close to mist
The one end for changing dirt pocket generates negative pressure, larger attraction is generated to the dust that pulp shooting machine generates, so that dust passes through dust collection
Pipe is inhaled into nebulization dust room, by the setting of spray head in nebulization dust room, so that fast into the indoor dust of nebulization dust
Speed atomization sedimentation, then by the vacuum suction of negative-pressure guide pipe, be discharged out of nebulization dust room, it, will into louvered dehydrator
Water containing dust and gas separation, then dust will be contained by the interior conduit of guiding gutter, exhaust pipe in water dust separation bin
It is discharged after water retention, sedimentation from sewage draining exit, the dust generated when whitewashing machine operation can be effectively reduced, dust removing effects are significantly
It is promoted, to realize environmental protection construction.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the utility model.
Fig. 2 is the structural schematic diagram of dust-extraction unit in Fig. 1.
Fig. 3 is the axial sectional view of Fig. 2.
In figure: 1- dust gathering arrester, 2- feed inlet, 3- dust-extraction unit, 301- dust collection pipe, 302- nebulization dust room, 303-
High-pressure pipe, 304- water inlet pipe, 305- high-pressure blast depression drainage device, 306- atomizer, 307- negative-pressure guide pipe, 308- hundred
Leaf formula dehydrator, 309- water dust separation bin, 310- sewage draining exit, 311- exhaust pipe, 312- guiding gutter.
Specific embodiment
The embodiments of the present invention are further described in detail with reference to the accompanying drawing.
A kind of dust-free pulp shooting machine, as shown in Figure 1, including dust gathering arrester 1, dust gathering arrester 1 is located on pulp shooting machine, dust gathering arrester 1
Top is provided with feed inlet 2, adds materials from feed inlet 2 into pulp shooting machine.The side of the lower end of dust gathering arrester 1 is provided with dedusting dress
Set 3.The structure of dust gathering arrester 1 and pulp shooting machine is the prior art, and it will not go into details herein.
As shown in Figure 2,3, dust-extraction unit 3 includes dust collection pipe 301, the left end of dust collection pipe 301 by flange with
Dust gathering arrester 1 connects, and dust collection pipe 301 is round table-like in right end is big, left end is small;Dust collection pipe 301 is in separate dust gathering arrester 1
One end is connected with nebulization dust room 302, the bottom of nebulization dust room 302 be disposed with from left to right high-pressure pipe 303, into
Water pipe 304, the caliber of water inlet pipe 304 are less than the caliber of high-pressure pipe 303;The top of high-pressure pipe 303 is located at atomization and removes
In dirt room 302, and its top is provided with high-pressure blast depression drainage device 305, is arranged on the outer peripheral surface of high-pressure blast depression drainage device 305
There is 6 gas tips (but be not limited to 6, the integers such as 2,3,4 can be set with circumference uniform distribution);Water inlet pipe 304 is located at atomization and removes
Part in dirt room 302 is in 90 ° of bend pipes, and the right end (namely end) of bend pipe is provided with atomizer 306, and atomizer 306
Axis projection (i.e. right view) be located in the axis projection (i.e. right view) of high-pressure blast depression drainage device 305, pass through atomization spray
The atomized water of first 306 injection absorbs into the dust in nebulization dust room 302;The right end of nebulization dust room 302 is communicated with negative pressure
Diversion pipe 307, the caliber of negative-pressure guide pipe 307 is first gradually reduced from left to right, is gradually increased again namely negative-pressure guide pipe 307
For venturi tube structure, both ends caliber is larger, and middle part caliber is smaller;The right end of negative-pressure guide pipe 307 is connected with louvered dehydration
Device 308, the right end of louvered dehydrator 308 are connected with water dust separation bin 309, and the bottom of water dust separation bin 309 is provided with blowdown
Mouth 310;The right end of water dust separation bin 309 is connected with exhaust pipe 311.
In addition, water dust separation bin 309 extends radially outward, and protrude from louvered dehydrator 308, exhaust pipe 311
Outer peripheral surface, so that guiding gutter 312 is arranged in the recessed formation guiding gutter 312 of the inner wall of water dust separation bin 309, sewage draining exit 310
Bottom.
As shown in figure 3, exhaust pipe 311 is in the annular structure that inside and outside pipeline is formed, and the left end of interior conduit does not protrude from
The left end of guiding gutter 312, in order to preferably separate gas, sewage.
The left end of the Outer Tube of exhaust pipe 311 and the right end of water dust separation bin 309 are an integral molding structure, and exhaust pipe
The right end of 311 Outer Tube is provided with turn edge, and the right end of the interior conduit of exhaust pipe 311 is provided with the method being adapted to turn edge
It is blue.
For manufacture easy to process, the right end caliber of dust collection pipe 301 and caliber, the nebulization dust of nebulization dust room 302
The caliber of room 302 and the left end caliber of negative-pressure guide pipe 307, the left end caliber of negative-pressure guide pipe 307 and negative-pressure guide pipe 307
Right end caliber and the caliber of louvered dehydrator 308, the caliber of louvered dehydrator 308 of right end caliber, negative-pressure guide pipe 307
It is equal with the caliber of the Outer Tube of exhaust pipe 311.
For the ease of installing, overhauling, each section of dust-extraction unit 3 is detachably connected by flange.That is, dust collection pipe
301 left end and dust gathering arrester 1, nebulization dust room 302 and negative-pressure guide pipe 307, negative-pressure guide pipe 307 and louvered dehydrator
308 be to pass through flanged joint;The right end of dust collection pipe 301 and the left end of nebulization dust room 302 are welded to connect.
The working principle of above-described embodiment is:
(1) in use, first checking for whether dust gathering arrester 1 is hermetically and securely located on pulp shooting machine, then pass through high pressure
Air inlet pipe 303 is passed through high pressure gas in nebulization dust room 302, is flowed into from large aperture by " Venturi effect " high pressure gas
When small-bore, flow velocity quickly improves and is formed negative pressuren zone, moreover, because the left end caliber of dust collection pipe 301 is relative to collection
For the inner space of dust hood 1, the left end caliber of dust collection pipe 301 is much smaller, so that dust collection pipe 301 and dust gathering arrester
1 forms similar venturi tube structure, and gas quickly flows in dust collection pipe 301 and forms negative pressure, makees in the absorption of negative pressure
Entered in nebulization dust room 302 with the dust in next part dust hood 1 by dust collection pipe 301;
(2) then start pulp shooting machine, to the feed inlet 2 of pulp shooting machine at add materials, stirring and pressure of the material in pulp shooting machine
A large amount of dust is generated in compression process, the dust in the suction-operated next part dust hood 1 of negative pressure enters mist by dust collection pipe 301
Change in dirt pocket 302, into the dust in nebulization dust room 302 under the suction-operated for the atomized water that atomizer 306 sprays
Form muddy water;
(3) due to the muddy water formed in nebulization dust room 302, heavier-weight needs negative pressure drainage in order to by mud
Water is removed from nebulization dust room 302.By nebulization dust room 302 right end be arranged negative-pressure guide pipe 307, high pressure gas to
Right flowing forms negative pressure again, and muddy water is sent into louvered dehydrator 308 by negative pressure, meanwhile, although most atomization
Dust is removed by nebulization dust room 302, but there are also a small amount of remaining atomization dust or muddy water by swiftly flowing gas
It is formed by under vacuum suction and is entered in louvered dehydrator 308 by negative-pressure guide pipe 307;
(4) muddy water, remaining atomization dust are separated with gas in louvered dehydrator 308, wherein contain dust
Sewage enters sewage draining exit 310 by the guiding gutter 312 of water dust separation bin 309 and is discharged, and gas is discharged from exhaust pipe 311.
Dust-extraction unit in the dust-free pulp shooting machine of the utility model causes negative pressure using high-pressure blast variable diameter passage, makes dust
From negative-pressure ward is passed through in closed dust gathering arrester into nebulization dust room 302, the atomized water then sprayed through atomizer 306 is inhaled
Attached dust enters louvered dehydrator 308 by negative-pressure guide pipe 307, then through water dust separation bin 309, using wind speed by water dust
Slurries are gone out by 312 water conservancy diversion of guiding gutter, which can be complete by residual air mouth above and below rotator type pulp shooting machine and blanking dust
It collects and handles, finally free of contamination compressed air is emitted into air, reduce the pollution to environment.
More importantly the utility model forms negative pressure twice by dust collection pipe 301, negative-pressure guide pipe 307, increase
The inhalant effect of big dust, to the dust in dust gathering arrester 1 be removed more thorough.
Meanwhile in order to will the water containing dust, high pressure gas separation, by the internal structure of exhaust pipe, drainpipe and lead
The positional relationship of sink is arranged, and further separates sewage with gas, realizes the efficient, intensive of dust removal, to realize
Environmental protection construction.
Claims (6)
1. a kind of dust-free pulp shooting machine, including the dust gathering arrester being located on pulp shooting machine, the side of the lower end of the dust gathering arrester is arranged
There is dust-extraction unit, it is characterised in that: the dust gathering arrester successively includes from left to right
Dust collection pipe, the dust collection pipe are round table-like in right end is big, left end is small;
Nebulization dust room, the bottom of the nebulization dust room are disposed with high-pressure pipe, water inlet pipe from left to right, it is described into
The end of water pipe is provided with atomizer;
The caliber of negative-pressure guide pipe, the negative-pressure guide pipe is first gradually reduced from left to right, is gradually increased again;
Louvered dehydrator;
Water dust separation bin, the water dust separation bin extends radially outward, and protrudes from the periphery of louvered dehydrator, exhaust pipe
Face, so that the recessed formation guiding gutter of the inner wall of water dust separation bin, the bottom of the guiding gutter is provided with sewage draining exit;
Exhaust pipe, the exhaust pipe is in the annular structure that inside and outside pipeline is formed, and the left end of interior conduit does not protrude from described lead
The left end of sink.
2. a kind of dust-free pulp shooting machine according to claim 1, it is characterised in that: the left end of the Outer Tube of the exhaust pipe
It is an integral molding structure with the right end of the water dust separation bin, and the right end of the Outer Tube of the exhaust pipe is provided with turn edge,
The right end of the interior conduit of the exhaust pipe is provided with the flange being adapted to the turn edge.
3. a kind of dust-free pulp shooting machine according to claim 1, it is characterised in that: the top of the high-pressure pipe is located at
In nebulization dust room, and the top of the high-pressure pipe is provided with high-pressure blast depression drainage device, the high-pressure blast negative pressure drainage
At least two gas tips are provided on the outer peripheral surface of device;It is in 90 ° of bend pipes that the water inlet pipe, which is located at the indoor part of nebulization dust,
The right end of bend pipe is provided with atomizer, and the axis projection of the atomizer is located at the axial direction of the high-pressure blast depression drainage device
In projection.
4. a kind of dust-free pulp shooting machine according to claim 3, it is characterised in that: the caliber of the water inlet pipe is less than described
The caliber of high-pressure pipe.
5. a kind of dust-free pulp shooting machine described in -4 any claims according to claim 1, it is characterised in that: the dust is received
A left side for the right end caliber of collector and the caliber of the nebulization dust room, the caliber of the nebulization dust room and the negative-pressure guide pipe
The right side of end pipe diameter, the right end caliber of the left end caliber of the negative-pressure guide pipe and the negative-pressure guide pipe, the negative-pressure guide pipe
End pipe diameter and the caliber of the caliber of the louvered dehydrator, the caliber and the exhaust pipe of the louvered dehydrator are homogeneous
Deng.
6. a kind of dust-free pulp shooting machine according to claim 5, it is characterised in that: the left end of the dust collection pipe and institute
Stating dust gathering arrester, the nebulization dust room and the negative-pressure guide pipe, the negative-pressure guide pipe and the louvered dehydrator is
Pass through flanged joint;The left end of the right end of the dust collection pipe and the nebulization dust room is welded to connect.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820980878.XU CN208541969U (en) | 2018-06-25 | 2018-06-25 | A kind of dust-free pulp shooting machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820980878.XU CN208541969U (en) | 2018-06-25 | 2018-06-25 | A kind of dust-free pulp shooting machine |
Publications (1)
Publication Number | Publication Date |
---|---|
CN208541969U true CN208541969U (en) | 2019-02-26 |
Family
ID=65423312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820980878.XU Expired - Fee Related CN208541969U (en) | 2018-06-25 | 2018-06-25 | A kind of dust-free pulp shooting machine |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN208541969U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108479281A (en) * | 2018-06-25 | 2018-09-04 | 河南中科支护机械设备有限公司 | A kind of dust-free pulp shooting machine |
-
2018
- 2018-06-25 CN CN201820980878.XU patent/CN208541969U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108479281A (en) * | 2018-06-25 | 2018-09-04 | 河南中科支护机械设备有限公司 | A kind of dust-free pulp shooting machine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105999923B (en) | A kind of the multimachine reason wet-scrubbing equipment and dust removal method of water circulation use | |
CN111298584B (en) | Double-venturi pneumatic wet dust removal system | |
CN101943021A (en) | Compressing-deslagging-drilling dust remover for coal pits | |
CN104645768B (en) | A kind of Wet type cyclone dust arrester | |
CN111878153B (en) | Coal mine dust removal system and dust removal method | |
CN101956563A (en) | Deduster | |
CN207237542U (en) | Wet dust collector | |
CN201818322U (en) | Gas-compressing, deslagging, drilling and dust remover for coal mine downhole | |
CN206625863U (en) | A kind of pulp shooting machine dust arrester | |
CN106958454B (en) | Wet-type coal mine dust collector | |
CN208541969U (en) | A kind of dust-free pulp shooting machine | |
CN101963065A (en) | Compressed air slag discharge drilling deduster for use under coal mines | |
CN208553525U (en) | A kind of dustless whitewashing unit of automatic charging | |
CN201818321U (en) | Dust remover | |
CN108479281A (en) | A kind of dust-free pulp shooting machine | |
CN209271072U (en) | A kind of wet scrubber | |
CN201818319U (en) | Underground gas-compressing deslagging drilling dust remover for coal mine | |
CN208803867U (en) | Wet scrubber is tunneled in underground | |
CN115263296A (en) | Efficient and safe dust removal system for mine and operation method | |
CN208304805U (en) | A kind of sandblasting house system convenient for adding sand | |
CN108295601A (en) | Dehydrator and efficient mist multi-cyclone dust pelletizing system | |
CN212079376U (en) | Dust removing device | |
CN212503011U (en) | Efficient concrete mixing plant raw material bin dust collector | |
CN210186678U (en) | Dust collector is used in chlorinated polyethylene production | |
CN206769941U (en) | A kind of New type wet coal mine dust remover |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190226 |