CN109372565A - A kind of coalmine ventilation plumbing installation with filtering function - Google Patents
A kind of coalmine ventilation plumbing installation with filtering function Download PDFInfo
- Publication number
- CN109372565A CN109372565A CN201811534400.5A CN201811534400A CN109372565A CN 109372565 A CN109372565 A CN 109372565A CN 201811534400 A CN201811534400 A CN 201811534400A CN 109372565 A CN109372565 A CN 109372565A
- Authority
- CN
- China
- Prior art keywords
- pipeline body
- spray head
- link block
- filtering function
- conservancy diversion
- 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
- 238000009423 ventilation Methods 0.000 title claims abstract description 34
- 238000009434 installation Methods 0.000 title claims abstract description 20
- 238000001914 filtration Methods 0.000 title claims abstract description 17
- 238000009428 plumbing Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000007921 spray Substances 0.000 claims abstract description 22
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 abstract description 20
- 238000004140 cleaning Methods 0.000 abstract description 5
- 239000008187 granular material Substances 0.000 abstract description 5
- 230000036541 health Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Prevention Of Fouling (AREA)
Abstract
The invention discloses a kind of coalmine ventilation plumbing installation with filtering function, including pipeline body, spray head and link block, Air Filter is fixedly installed at the top exit of the pipeline body, and installation by adhering has water conservancy diversion water pipe on pipeline body, and fixing piece is fixedly connected between water conservancy diversion water pipe and pipeline body, the spray head perforation is connected on water conservancy diversion water pipe, and spray head is located in pipeline body, and perforation is equipped with ventilation duct on the outer wall of pipeline body, the link block is fixedly installed on the inner wall for storing stream tank, and the avris for storing stream tank and link block junction offers intercommunicating pore, the bottom center for storing stream tank is provided with drainage tube.The coalmine ventilation plumbing installation with filtering function can be filtered processing to the dust granule carried in the gas in Coal Mine hole, reduce the dust residue in gas, protect the health of environment and human body, while facilitating the cleaning inside ventilation shaft.
Description
Technical field
The present invention relates to coalmine ventilation pipe technology field, specially a kind of coalmine ventilation pipeline dress with filtering function
It sets.
Background technique
Coalmine ventilation pipeline is to be aerated the equipment tool for excluding dirty air in coal mining mine hole, pass through coal mine
The application of ventilation shaft maintains reasonable gas componant content inside mine hole, avoids the overstocked or oxygen of pernicious gas in mine hole
The insufficient problem of supply generation, influence the physical health issues of mine hole internal work personnel, then existing coalmine ventilation
Plumbing installation still has following problems when in use:
1, it existing coalmine ventilation pipeline configuration and has a single function, when gas is discharged, can be mingled with a large amount of ash in gas
Dirt while influencing pipeline external environmental problem, be easy to cause the security risk of human health caused by fine dust；
2, the integral structure that coalmine ventilation pipeline is disposed through, while rough dedusting, it has not been convenient to the dust under filter
Removal disposal is carried out, the internal dust accumulation for causing coalmine ventilation pipeline to be used for a long time.
In view of the above-mentioned problems, being badly in need of carrying out innovative design on the basis of original coalmine ventilation pipeline.
Summary of the invention
The purpose of the present invention is to provide a kind of coalmine ventilation plumbing installation with filtering function, to solve above-mentioned background
Technology proposes that existing coalmine ventilation function pipeline and structure are single, be easy to cause the loss of dust in mine hole, influences extraneous ring
Border is detrimental to health, and the problem of be unfavorable for the cleaning of pipeline internal dust.
To achieve the above object, the invention provides the following technical scheme: a kind of coalmine ventilation pipeline with filtering function
Device, including pipeline body, spray head and link block are fixedly installed with Air Filter at the top exit of the pipeline body, and manage
Installation by adhering has water conservancy diversion water pipe on road ontology, and is fixedly connected with fixing piece between water conservancy diversion water pipe and pipeline body, described
Spray head perforation is connected on water conservancy diversion water pipe, and spray head is located in pipeline body, and penetrated through on the outer wall of pipeline body be equipped with it is logical
Air hose, and storage stream tank is provided with by connecting rod at the outlet at bottom of pipeline body, the link block is fixedly installed in storage stream
On the inner wall of tank, and the avris for storing stream tank and link block junction offers intercommunicating pore, and installs in link block and intercommunicating pore
There is dirt filtrating screen, the bottom center for storing stream tank is provided with drainage tube.
Preferably, water conservancy diversion water pipe structure setting in meandering shape on pipeline body, and the 1/2 of water conservancy diversion water pipe is located at pipe
In road ontology.
Preferably, the spray head is angularly evenly arranged with 6 about the vertical central axis of pipeline body, and spray head with
There is slanted angle inwardly in the inner wall of pipeline body.
Preferably, the bottom for storing stream tank is set as inner concavity structure, and stores stream tank and drainage tube perforation connection.
Preferably, the link block is set as " n " font structure, and link block and dirt filtrating screen constitute disassembly mounting structure.
Preferably, the dust filtration net is made of mesh sheet, positioning strip, magnetic sheet and four part of locating piece, and the avris of mesh sheet is fixed
There is positioning strip, magnetic sheet is installed on the outside of positioning strip, the end of mesh sheet and positioning strip is provided with locating piece, and mesh sheet is set as
" V " font structure, and the lateral section of mesh sheet is identical as the shape of intercommunicating pore.
Compared with prior art, the beneficial effects of the present invention are: the coalmine ventilation plumbing installation with filtering function, energy
It is enough that processing is filtered to the dust granule carried in the gas in Coal Mine hole, reduce the dust residue in gas, protection ring
The health in border and human body, while facilitating the cleaning inside ventilation shaft；
1, the work by spray head is only needed, so that water flow forms one of cascade in the inside of pipeline body, passes through water in gas
While curtain, the dust in gas can be directly by cascade leukorrhagia, so that the gas of discharge line ontology is more clean；
2, in the case where dismantling mounted dirt filtrating screen effect, building up inside dust caused by working long hours to ventilation shaft carries out clear
Reason, extends the service life of plumbing installation, and facilitate the disassembly mounting structure of dirt filtrating screen, carries out the recycling and reusing at water source.
Detailed description of the invention
Fig. 1 is positive structure schematic of the present invention；
Fig. 2 is water conservancy diversion water pipe mounting structure schematic diagram of the present invention；
Fig. 3 is that the present invention stores stream tank schematic diagram of internal structure；
Fig. 4 is dirt filtrating screen structural schematic diagram of the present invention.
In figure: 1, pipeline body；2, Air Filter；3, water conservancy diversion water pipe；4, fixing piece；5, spray head；6, ventilation duct；7, it connects
Bar；8, stream tank is stored；9, link block；10, intercommunicating pore；11, dirt filtrating screen；1101, mesh sheet；1102, positioning strip；1103, magnetic sheet；
1104, locating piece；12, drainage tube.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-4 is please referred to, the present invention provides a kind of technical solution: a kind of coalmine ventilation pipeline dress with filtering function
It sets, including pipeline body 1, Air Filter 2, water conservancy diversion water pipe 3, fixing piece 4, spray head 5, ventilation duct 6, connecting rod 7, storage stream tank 8, connection
Block 9, intercommunicating pore 10, dirt filtrating screen 11, mesh sheet 1101, positioning strip 1102, magnetic sheet 1103, locating piece 1104 and drainage tube 12, pipeline
Air Filter 2 is fixedly installed at the top exit of ontology 1, and installation by adhering has water conservancy diversion water pipe 3 on pipeline body 1, and leads
Fixing piece 4 is fixedly connected between overflow pipe 3 and pipeline body 1, the perforation of spray head 5 is connected on water conservancy diversion water pipe 3, and 5, spray head
In in pipeline body 1, and on the outer wall of pipeline body 1, perforation is equipped with ventilation duct 6, and at the outlet at bottom of pipeline body 1
Connecting rod 7 is provided with storage stream tank 8, link block 9 is fixedly installed on the inner wall for storing stream tank 8, and stores stream tank 8 and link block 9
The avris of junction offers intercommunicating pore 10, and dirt filtrating screen 11 is equipped in link block 9 and intercommunicating pore 10, stores the bottom of stream tank 8
Portion's center is provided with drainage tube 12；
The structure setting in meandering shape on pipeline body 1 of water conservancy diversion water pipe 3, and the 1/2 of water conservancy diversion water pipe 3 is located in pipeline body 1, leads
The setting of overflow pipe 3, mounting structure are stablized, and while fixed, can move to the water conservancy diversion for carrying out water source inside pipeline body 1
It is dynamic；
Spray head 5 is angularly evenly arranged with 6, and spray head 5 and pipeline body 1 about the vertical central axis of pipeline body 1
There is slanted angle inwardly in inner wall, the setting of spray head 5 so that generating cascade inside pipeline body 1, passes through water at work
Curtain is filtered the dust in gas；
The bottom for storing stream tank 8 is set as inner concavity structure, and stores stream tank 8 and the perforation connection of drainage tube 12, stores the bottom knot of stream tank 8
Structure setting directly flows out from drainage tube 12 so that collecting in the liquid stored inside stream tank 8, reduces residual moisture；
Link block 9 is set as " n " font structure, and link block 9 and dirt filtrating screen 11 constitute disassembly mounting structure, the knot of link block 9
Structure setting, convenient that dirt filtrating screen 11 is fixed on the positioning, the fix stably after the installation of dirt filtrating screen 11 are not easily to fall off；
Dirt filtrating screen 11 is made of mesh sheet 1101, positioning strip 1102, magnetic sheet 1103 and 1,104 4 part of locating piece, the side of mesh sheet 1101
Side is fixed with positioning strip 1102, and the outside of positioning strip 1102 is equipped with magnetic sheet 1103, the end of mesh sheet 1101 and positioning strip 1102
It is provided with locating piece 1104, and mesh sheet 1101 is set as " V " font structure, and the lateral section of mesh sheet 1101 and intercommunicating pore 10
Shape is identical, the structure setting of dirt filtrating screen 11, convenient to be collected accumulation to the dust granule in water, while when dismantling installation
It operates more convenient.
Working principle: it when using the coalmine ventilation plumbing installation with filtering function, first according to Fig. 1-2, is leading
Overflow pipe 3 is led come water source after, water flow forms cascade inside pipeline body 1 by the spray head 5 on water conservancy diversion water pipe 3, in ventilation duct 6
When continuing to import gas in pipeline body 1, the dust impurity in gas is directly mixed with the cascade in pipeline body 1,
The dust granule of bulk is formed, subsequent dust granule flows tank 8 as water flow is oriented to storage by the outlet at bottom of pipeline body 1 together
Internal dirt filtrating screen 11 carries out the collection operation of dust between the mesh sheet 1101 in dirt filtrating screen 11, has then been filtered dust
Water flow flows the drainage tube 12 of 8 bottom of tank by storing, and carries out the collection processing at water source, cycling and reutilization processing；
According to Fig. 1 and Fig. 3-4, when needing to be collected cleaning to the dust in dirt filtrating screen 11 in mesh sheet 1101, pass through positioning
Block 1104 pulls, and mesh sheet 1101 and 1102 entirety of positioning strip are removed from link block 9, and takes under the action of intercommunicating pore 10
Stream tank 8 is stored out, carries out the cleaning operation outside device, it is convenient to use, when needing to install dirt filtrating screen 11, positioning strip
1102 outside magnetic sheet 1103 engaged with link block 9 after magnetic absorption, it is easy to use and operate fast, to dirt filtrating screen 11 into
The good positioning of row is fixed, and is not susceptible to the use that dirt filtrating screen 11 works and is fallen off problem.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (6)
1. a kind of coalmine ventilation plumbing installation with filtering function, including pipeline body (1), spray head (5) and link block (9),
It is characterized by: being fixedly installed with Air Filter (2) at the top exit of the pipeline body (1), and it is embedded on pipeline body (1)
Formula is equipped with water conservancy diversion water pipe (3), and fixing piece (4) are fixedly connected between water conservancy diversion water pipe (3) and pipeline body (1), described
Spray head (5) perforation is connected on water conservancy diversion water pipe (3), and spray head (5) is located in pipeline body (1), and the outer wall of pipeline body (1)
Upper perforation is equipped with ventilation duct (6), and connecting rod (7) are provided with storage stream tank at the outlet at bottom of pipeline body (1)
(8), the link block (9) is fixedly installed on the inner wall for storing stream tank (8), and stores the side of stream tank (8) and link block (9) junction
Side offers intercommunicating pore (10), and is equipped with dirt filtrating screen (11) in link block (9) and intercommunicating pore (10), and the storage flows tank (8)
Bottom center be provided with drainage tube (12).
2. a kind of coalmine ventilation plumbing installation with filtering function according to claim 1, it is characterised in that: described to lead
Overflow pipe (3) structure setting in meandering shape on pipeline body (1), and the 1/2 of water conservancy diversion water pipe (3) is located in pipeline body (1).
3. a kind of coalmine ventilation plumbing installation with filtering function according to claim 1, it is characterised in that: the spray
Head (5) is angularly evenly arranged with 6, and spray head (5) and pipeline body (1) about the vertical central axis of pipeline body (1)
Inner wall there is slanted angle inwardly.
4. a kind of coalmine ventilation plumbing installation with filtering function according to claim 1, it is characterised in that: the storage
The bottom of stream tank (8) is set as inner concavity structure, and stores stream tank (8) and drainage tube (12) perforation connection.
5. a kind of coalmine ventilation plumbing installation with filtering function according to claim 1, it is characterised in that: the company
It connects block (9) and is set as " n " font structure, and link block (9) and dirt filtrating screen (11) constitute disassembly mounting structure.
6. a kind of coalmine ventilation plumbing installation with filtering function according to claim 1, it is characterised in that: the filter
Dirt net (11) is made of mesh sheet (1101), positioning strip (1102), magnetic sheet (1103) and (1104) four part of locating piece, mesh sheet
(1101) avris is fixed with positioning strip (1102), is equipped on the outside of positioning strip (1102) magnetic sheet (1103), mesh sheet (1101)
It is provided with locating piece (1104) with the end of positioning strip (1102), and mesh sheet (1101) is set as " V " font structure, and mesh sheet
(1101) lateral section is identical as the shape of intercommunicating pore (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534400.5A CN109372565A (en) | 2018-12-14 | 2018-12-14 | A kind of coalmine ventilation plumbing installation with filtering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534400.5A CN109372565A (en) | 2018-12-14 | 2018-12-14 | A kind of coalmine ventilation plumbing installation with filtering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109372565A true CN109372565A (en) | 2019-02-22 |
Family
ID=65373655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811534400.5A Pending CN109372565A (en) | 2018-12-14 | 2018-12-14 | A kind of coalmine ventilation plumbing installation with filtering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109372565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370910A (en) * | 2020-10-10 | 2021-02-19 | 芜湖质勉信息科技有限公司 | Water atomization cleaning equipment for cotton fiber processing dust and water-sewage separation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008231749A (en) * | 2007-03-20 | 2008-10-02 | Toda Constr Co Ltd | Cleaning device for tunnel dust and exhaust gas |
| CN101967991A (en) * | 2010-10-15 | 2011-02-09 | 镇江安达煤矿专用设备有限公司 | Dewatering device of wet dust removing blower |
| CN204413039U (en) * | 2015-02-06 | 2015-06-24 | 南充同俊机械制造有限公司 | Molding sand retracting device |
| CN107288674A (en) * | 2017-07-11 | 2017-10-24 | 宁波智正伟盈信息科技有限公司 | A kind of air cleaning ventilation equipment in ore deposit hole |
| CN206660807U (en) * | 2017-02-11 | 2017-11-24 | 陕西彬长文家坡矿业有限公司 | A kind of underground mine use pressure ventilation pipe filter |
| CN207297073U (en) * | 2017-09-29 | 2018-05-01 | 河南金源黄金矿业有限责任公司 | A kind of ventilation device for reducing dust for mine |
| CN208087855U (en) * | 2018-04-12 | 2018-11-13 | 吴江市新吴纺织有限公司 | A kind of spray nozzle device of weaving water-jet loom |
-
2018
- 2018-12-14 CN CN201811534400.5A patent/CN109372565A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008231749A (en) * | 2007-03-20 | 2008-10-02 | Toda Constr Co Ltd | Cleaning device for tunnel dust and exhaust gas |
| CN101967991A (en) * | 2010-10-15 | 2011-02-09 | 镇江安达煤矿专用设备有限公司 | Dewatering device of wet dust removing blower |
| CN204413039U (en) * | 2015-02-06 | 2015-06-24 | 南充同俊机械制造有限公司 | Molding sand retracting device |
| CN206660807U (en) * | 2017-02-11 | 2017-11-24 | 陕西彬长文家坡矿业有限公司 | A kind of underground mine use pressure ventilation pipe filter |
| CN107288674A (en) * | 2017-07-11 | 2017-10-24 | 宁波智正伟盈信息科技有限公司 | A kind of air cleaning ventilation equipment in ore deposit hole |
| CN207297073U (en) * | 2017-09-29 | 2018-05-01 | 河南金源黄金矿业有限责任公司 | A kind of ventilation device for reducing dust for mine |
| CN208087855U (en) * | 2018-04-12 | 2018-11-13 | 吴江市新吴纺织有限公司 | A kind of spray nozzle device of weaving water-jet loom |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370910A (en) * | 2020-10-10 | 2021-02-19 | 芜湖质勉信息科技有限公司 | Water atomization cleaning equipment for cotton fiber processing dust and water-sewage separation method thereof |
| CN112370910B (en) * | 2020-10-10 | 2022-09-06 | 芜湖质勉信息科技有限公司 | Water atomization cleaning equipment for dust generated in cotton fiber processing and water-sewage separation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104548776B (en) | Industrial dust collector with improved structure | |
| CN203303802U (en) | Bag-type dust collector | |
| CN203655341U (en) | Novel wet-type mining cyclone dust remover | |
| CN209689133U (en) | A kind of air filter for indoor offer fresh air | |
| CN210964446U (en) | Coal mine dust removal equipment convenient to clean | |
| CN103032094B (en) | Energy-saving self-circulation dust removal device for the pulp shooting machine | |
| CN109372565A (en) | A kind of coalmine ventilation plumbing installation with filtering function | |
| CN207928916U (en) | A kind of coal mine dedusting device | |
| CN108579268A (en) | A kind of mine dry-type Rose Box | |
| CN206867867U (en) | A kind of granulation dust exhaust apparatus | |
| CN211659617U (en) | Raw materials processing dust collector | |
| CN207708750U (en) | A kind of mine cyclone dust | |
| CN207886819U (en) | A kind of efficient cyclone dust-extraction unit | |
| CN104847397B (en) | One kind is used for Safety of Coal Mine Production tunnel deduster | |
| CN206621923U (en) | A kind of high dirt emission-control equipment | |
| CN205867900U (en) | Powder dust removal collection device | |
| CN104645738B (en) | In wet electrostatic oil fume purifier except fiber plant | |
| CN208018337U (en) | A kind of dust-extraction unit of Airshower chamber | |
| CN209237613U (en) | A kind of Novel dust collection device | |
| CN211302495U (en) | Chemical industry is with waste gas desulfurization tower of environmental protection | |
| CN204261497U (en) | Sanitary air cleaning unit is maintained in production management system | |
| CN207950979U (en) | A kind of standardization dust purification device | |
| CN209501157U (en) | A kind of secondary collecting dust-removing purification device | |
| CN209005420U (en) | Novel belt venturi scrubber bag cage | |
| CN206366268U (en) | A kind of deduster |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |