CN109276928A - Gradual-change bore diameter gradient filtration formula foldable filter element - Google Patents
Gradual-change bore diameter gradient filtration formula foldable filter element Download PDFInfo
- Publication number
- CN109276928A CN109276928A CN201811483476.XA CN201811483476A CN109276928A CN 109276928 A CN109276928 A CN 109276928A CN 201811483476 A CN201811483476 A CN 201811483476A CN 109276928 A CN109276928 A CN 109276928A
- Authority
- CN
- China
- Prior art keywords
- layer
- filter element
- gradual
- bore diameter
- foldable filter
- 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
- 238000001914 filtration Methods 0.000 title claims abstract description 73
- 239000010410 layer Substances 0.000 claims description 71
- 239000004743 Polypropylene Substances 0.000 claims description 28
- -1 polypropylene Polymers 0.000 claims description 22
- 229920001155 polypropylene Polymers 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 18
- 239000012535 impurity Substances 0.000 abstract description 12
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 230000000717 retained effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011101 absolute filtration Methods 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011118 depth filtration Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
- B01D29/232—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets
- B01D29/235—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets having a concertina shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/14—Pleat-type membrane modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/26—Further operations combined with membrane separation processes
- B01D2311/2649—Filtration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a kind of gradual-change bore diameter gradient filtration formula foldable filter elements, are related to filter core technical field.The gradual-change bore diameter gradient filtration formula foldable filter element, including influent side confined area, the lateral surface of the influent side confined area are provided with influent side support guiding region, and the lateral surface of influent side support guiding region is provided with pre-filtering area.The gradual-change bore diameter gradient filtration formula foldable filter element, multilayered structure has stable filtering accuracy, molecule and gluey sundries can effectively be intercepted, multi-layer structure design provides height and receives dirty space and filter area, have the characteristics that pollutant holding capability is big and long using the time, filter core is under the premise of guaranteeing filter efficiency with the service life of overlength, filter core filters multilayer rolled structure by support guide layer and pre-filtering and effectively, deflector hole of the accurate distribution on medium helps fluid to shunt between the layers to greatest extent, structure design by improving filter core shunts impurity fluid, to which impurity is successively retained in filter core.
Description
Technical field
The present invention relates to filter core technical field, specially a kind of gradual-change bore diameter gradient filtration formula foldable filter element.
Background technique
Currently, liquid filtration and separation techniques are PP Wound-rotor type filter core, PP melt-blown filter and common fold using more
Filter core, PP melt-blown filter are only made of polypropylene bulk material by melt-blown process, PP Wire-wound filter core, only yarn and skeleton
Be entwined, common foldable filter element only has single effective filter layer composition, the filter effect of three kinds of filter cores cannot achieve by
The thick effect to thin gradual-change bore diameter, gradient type filtering.The filter area of PP Wound-rotor type filter core and PP melt-blown filter is smaller, although
Due to the folding technology of use, filter area increased common foldable filter element, but relatively easy due to forming, pollutant holding capability compared with
Low, filtering accuracy is relatively narrow, and operation a period of time after-filter disengaging differential water pressures significantly increase, the service life of three kinds of filter cores
Universal shorter, the replacement cycle is very fast, and pressure difference can not extend filter core use by element back-wash filter during operation in the case where increasing
Service life.
Currently, there are many different folding type filter elements assembled, but often only has one of feature, so that filter effect
It is poor to be difficult meet at present existing filtration applications, carry out inconvenience to industrial filter work belt.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of gradual-change bore diameter gradient filtration formula foldable filter element, had
The good advantage of effect is filtered, solves that filter effect is poor, and service life is short, the big problem of operation pressure.
(2) technical solution
To realize the good purpose of above-mentioned filter effect, the invention provides the following technical scheme: gradual-change bore diameter gradient filtration formula
Foldable filter element, including influent side confined area, the lateral surface of the influent side confined area is provided with influent side support guiding region, described
The lateral surface of influent side support guiding region is provided with pre-filtering area, and effective filtering area, institute is arranged in the lateral surface in the pre-filtering area
The lateral surface for stating effective filtering area is provided with water outlet side support guiding region, and the lateral surface of water outlet side support guiding region is provided with
Water outlet side confined area.
The technical program is advanced optimized, the influent side confined area includes foldable filter element center-pole, the foldable filter element
Center-pole is connected with each other composition inner frame.
The technical program is advanced optimized, influent side support guiding region includes reinforcing layer and shunting layer, the reinforcing
Layer is polypropylene mesh cloth interlaced plies, and the shunting layer is polypropylene filament filled layer, and the reinforcing layer is located at the interior of shunting layer
Lateral inner.
The technical program is advanced optimized, the pre-filtering area includes purifying layer, and the purifying layer is polypropylene non-woven fabric
Filled layer.
The technical program is advanced optimized, effective filtering area includes filtering membrane element, and the filtering membrane element is by different holes
The filtration module of diameter at composite membrane form.
The technical program is advanced optimized, water outlet side support guiding region includes protective layer and supporting layer, the protection
Layer is polypropylene non-woven fabric protective film, and the supporting layer is polypropylene mesh cloth interlaced plies.
The technical program is advanced optimized, the water outlet side confined area includes foldable filter element putamina, the foldable filter element film
Shell phase, which connects, forms outer skeleton.
(3) beneficial effect
Compared with prior art, the present invention provides gradual-change bore diameter gradient filtration formula foldable filter elements, have following beneficial to effect
Fruit:
1, the gradual-change bore diameter gradient filtration formula foldable filter element, multilayered structure have stable filtering accuracy, can effectively block
Cut molecule and gluey sundries, multi-layer structure design provides height and receives dirty space and filter area, has pollutant holding capability greatly and makes
With the time it is long the features such as, filter core is with the service life of overlength under the premise of guaranteeing filter efficiency, and filter core is by support guide layer and pre-
Filtering and effective filtering multilayer rolled structure, deflector hole of the accurate distribution on medium help fluid in layer and layer to greatest extent
Between shunt, by improve filter core structure design shunt impurity fluid, so that impurity is successively cut in filter core
It stays.
2, the gradual-change bore diameter gradient filtration formula foldable filter element, matrix-style are arranged in the deflector hole of ectonexine, size, number
When mesh and position and support guide layer cooperation, impurity can be evenly distributed among each layer, while in turn ensure stable stream
The number of speed, deflector hole is gradually decreased by outer layers towards inner layers, to guarantee that dirt content is uniformly distributed according to matrix form, in filter core
Effective filter layer that most the inside is combined type gradual-change bore diameter, this part ensure that absolute filtration core precision.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is schematic enlarged-scale view at A in Fig. 1.
In figure: 1, influent side confined area；2, influent side supports guiding region；3, pre-filtering area；4, effective filtering area；5, it is discharged
Collateral support guiding region；6, water outlet side confined area；7, foldable filter element center-pole；8, reinforcing layer；9, shunting layer；10, purifying layer；11,
Filter membrane element；12, protective layer；13, supporting layer；14, foldable filter element putamina.
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.
Gradual-change bore diameter gradient filtration formula foldable filter element referring to FIG. 1-2, including influent side confined area 1, influent side confined area
1 lateral surface is provided with influent side support guiding region 2, and the lateral surface of influent side support guiding region 2 is provided with pre-filtering area 3, in advance
Effective filtering area 4 is arranged in the lateral surface of filtering area 3, and the lateral surface of effective filtering area 4 is provided with water outlet side support guiding region 5, out
The lateral surface of the collateral support guiding region 5 of water is provided with water outlet side confined area 6, the gradual-change bore diameter gradient filtration formula foldable filter element, multilayer
Secondary structure has stable filtering accuracy, can effectively intercept molecule and gluey sundries, multi-layer structure design provide Gao Na
Dirty space and filter area have the characteristics that pollutant holding capability is big and long using the time, and filter core has under the premise of guaranteeing filter efficiency
There is the service life of overlength, filter core filters multilayer rolled structure by support guide layer and pre-filtering and effectively, and accurate distribution is on medium
Deflector hole help fluid to shunt between the layers to greatest extent, by improve filter core structure design make impurity fluid into
Row shunts, so that impurity is successively retained in filter core.
Specifically, influent side confined area 1 includes foldable filter element center-pole 7, foldable filter element center-pole 7 is connected with each other in composition
Skeleton, what pressurized fluid passed through at first is the foldable filter element center-pole 7 in the region, which, which plays, bears Fluid pressure and consolidate
Surely the function of foldable filter element influent side is supported, inner frame increases the mechanical strength of foldable filter element, increases the voltage endurance capability of filter core,
Protect the support guide layer inside filter core from the direct impact of fluid.
Specifically, influent side support guiding region 2 includes reinforcing layer 8 and shunting layer 9, reinforcing layer 8 is polypropylene mesh cloth friendship
Tissue layer, shunting layer 9 are polypropylene filament filled layer, and reinforcing layer 8 is located inside the medial surface of shunting layer 9, and influent side is using peculiar
Guide layer distribution structure, polypropylene mesh cloth interlaced plies addition polymerization polypropylene filaments two layers of support water conservancy diversion of filled layer, composition multilayer volume
Formula structure.Fluid just flows to the region after passing through 1 center-pole of influent side confined area, from the polypropylene mesh cloth for having uniform meshes
Uniformly pass through with polypropylene filament layer, so that fluid, uniformly through filtering material, realization is caught with entire filter element filtering area
Particle is caught, there is brilliant and permanent service life, impurity fluid is shunted in advance in the region, is improved impurity and is successively retained
Efficiency, deflector hole of the accurate distribution on medium help fluid to shunt between the layers to greatest extent.
Specifically, pre-filtering area 3 includes purifying layer 10, purifying layer 10 is polypropylene non-woven fabric filled layer, since the layer is received
Dirt amount is higher, mainly completes pre-filtered effect, filters a part of large granular impurity, while the also filter membrane of package the inside, rises
To the effect of protection filter membrane.
Specifically, effectively filtering area 4 include filtering membrane element 11, filtering membrane element 11 by different pore size filtration module at answer
Close film composition, the region be foldable filter element core component, effective filter layer be a variety of different pore sizes filtration module at answer
Film is closed, the structure design of gradual-change bore diameter can be realized layered filtration, and from thick to thin, gradient type completes the filtering of entire fluid, should
Structure category in-depth filtration core concertina configuration, film filter area is big, and flux is big, and pressure difference is low, and pollutant carrying capacity is strong, long service life,
Available there are many filtering accuracy, application is extensive.
Specifically, water outlet side support guiding region 5 includes protective layer 12 and supporting layer 13, protective layer 12 is polypropylene non-woven fabric
Protective film, supporting layer 13 are polypropylene mesh cloth interlaced plies, and water outlet side uses distinctive guide layer distribution structure, polypropylene non-woven
Cloth protective film adds polypropylene mesh cloth interlaced plies, two layers of support water conservancy diversion, forms multilayer rolled structure, while can guarantee to play pair
The support of filter core water outlet side backwash, protection filter core are that internal filter membrane reduces impact in backwash, avoid moving and pre-filtering area 3
Equally have the function of wrapping up filter membrane.
Specifically, water outlet side confined area 6 includes foldable filter element putamina 14, foldable filter element putamina 14 is connected with each other composition dermoskeleton
Frame, what the fluid after filtering finally passed through is the foldable filter element putamina 14 in the region, which increases folding filter
The mechanical strength of core wraps up the filter layer of the inside, makes its sizing, will not move, and guarantees filter effect, increases the resistance to of element back-wash filter
Pressure energy power protects the support guide layer inside filter core from the direct impact of fluid.
In conclusion the gradual-change bore diameter gradient filtration formula foldable filter element, multilayered structure has stable filtering accuracy, energy
Effectively intercept molecule and gluey sundries, multi-layer structure design provides height and receives dirty space and filter area, has pollutant holding capability
The features such as greatly and using the time long, filter core is with the service life of overlength under the premise of guaranteeing filter efficiency, and filter core is by support water conservancy diversion
Layer and pre-filtering and effective filtering multilayer rolled structure, deflector hole of the accurate distribution on medium help fluid to exist to greatest extent
It shunts between layers, the structure design by improving filter core shunts impurity fluid, so that impurity is layer-by-layer in filter core
It is retained.
It should be noted that, in this document, such as the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. gradual-change bore diameter gradient filtration formula foldable filter element, including influent side confined area (1), it is characterised in that: the influent side is held
The lateral surface of pressure area (1) is provided with influent side support guiding region (2), the lateral surface setting of influent side support guiding region (2)
Have pre-filtering area (3), the effective filtering area (4) of lateral surface setting of the pre-filtering area (3), outside effective filtering area (4)
Side is provided with water outlet side support guiding region (5), and the lateral surface of water outlet side support guiding region (5) is provided with water outlet side pressure-bearing
Area (6).
2. gradual-change bore diameter gradient filtration formula foldable filter element according to claim 1, it is characterised in that: the influent side pressure-bearing
Area (1) includes foldable filter element center-pole (7), and the foldable filter element center-pole (7) is connected with each other composition inner frame.
3. gradual-change bore diameter gradient filtration formula foldable filter element according to claim 1, it is characterised in that: the influent side support
Guiding region (2) includes reinforcing layer (8) and shunting layer (9), and the reinforcing layer (8) is polypropylene mesh cloth interlaced plies, the shunting
Layer (9) is polypropylene filament filled layer, and the reinforcing layer (8) is located inside the medial surface of shunting layer (9).
4. gradual-change bore diameter gradient filtration formula foldable filter element according to claim 1, it is characterised in that: the pre-filtering area
It (3) include purifying layer (10), the purifying layer (10) is polypropylene non-woven fabric filled layer.
5. gradual-change bore diameter gradient filtration formula foldable filter element according to claim 1, it is characterised in that: effective filtering area
(4) include filtering membrane element (11), it is described filtering membrane element (11) by different pore size filtration module at composite membrane form.
6. gradual-change bore diameter gradient filtration formula foldable filter element according to claim 1, it is characterised in that: the water outlet side support
Guiding region (5) includes protective layer (12) and supporting layer (13), and the protective layer (12) is polypropylene non-woven fabric protective film, the branch
Supportting layer (13) is polypropylene mesh cloth interlaced plies.
7. gradual-change bore diameter gradient filtration formula foldable filter element according to claim 1, it is characterised in that: the water outlet side pressure-bearing
Area (6) includes foldable filter element putamina (14), and the foldable filter element putamina (14), which is connected with each other, forms outer skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483476.XA CN109276928A (en) | 2018-12-06 | 2018-12-06 | Gradual-change bore diameter gradient filtration formula foldable filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483476.XA CN109276928A (en) | 2018-12-06 | 2018-12-06 | Gradual-change bore diameter gradient filtration formula foldable filter element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109276928A true CN109276928A (en) | 2019-01-29 |
Family
ID=65173374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811483476.XA Pending CN109276928A (en) | 2018-12-06 | 2018-12-06 | Gradual-change bore diameter gradient filtration formula foldable filter element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109276928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733282A (en) * | 2022-04-24 | 2022-07-12 | 廊坊坤合过滤器材有限公司 | Foldable natural gas filter core |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961607A (en) * | 2009-07-23 | 2011-02-02 | 上海过滤器有限公司 | Folded teflon composite microporous membrane and filter element |
| CN206285560U (en) * | 2016-11-17 | 2017-06-30 | 苏州工业园区拓朴环保净化有限公司 | Big flow glass formula foldable filter element |
-
2018
- 2018-12-06 CN CN201811483476.XA patent/CN109276928A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961607A (en) * | 2009-07-23 | 2011-02-02 | 上海过滤器有限公司 | Folded teflon composite microporous membrane and filter element |
| CN206285560U (en) * | 2016-11-17 | 2017-06-30 | 苏州工业园区拓朴环保净化有限公司 | Big flow glass formula foldable filter element |
Non-Patent Citations (2)
| Title |
|---|
| 奚正平，汤慧萍等: "烧结金属多孔材料", 31 January 2009, 中国医药科技出版社, pages: 266 - 17 * |
| 潘卫三, 中国医药科技出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733282A (en) * | 2022-04-24 | 2022-07-12 | 廊坊坤合过滤器材有限公司 | Foldable natural gas filter core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211886279U (en) | Roll up formula membrane module, compound filter element group spare and water purification system | |
| CN101829452B (en) | Filter core and manufacturing method thereof | |
| JP2008516753A (en) | Pleated multilayer filter media and cartridge | |
| GB2267656A (en) | Helically wrapped filter element | |
| CN109276928A (en) | Gradual-change bore diameter gradient filtration formula foldable filter element | |
| JP2009226322A (en) | Mist filter | |
| CN209475726U (en) | A kind of gradual-change bore diameter gradient filtration formula foldable filter element | |
| CN203678068U (en) | Multi-layer ultra-efficient dirt-containing oil-absorption filter bag | |
| CN202909550U (en) | Efficient compound bag type filtering element | |
| CN213527639U (en) | Multiple-effect combined type filter core | |
| JP2018126721A (en) | filter | |
| CN203321626U (en) | Engine oil filter element | |
| CN206138870U (en) | Multilayer woven wire sintering filter core | |
| CN211435286U (en) | Multifunctional long-acting combined type filter element | |
| CN110255748A (en) | Compound filter element group spare and water purification system | |
| CN202638139U (en) | Five-layer titanium sintered net | |
| CN215539878U (en) | Folding RO membrane composite construction, filter core and water purifier | |
| KR20110005479A (en) | Cylindrical depth filter for filtering fluid and manufacturing method thereof | |
| KR101732684B1 (en) | Method of producing an ion-exchange fiber Plaited thread Micro chip filter | |
| JPH11156125A (en) | Depth type filter | |
| CN210356300U (en) | Composite filter element and water purifying device | |
| CN209872555U (en) | Composite filter element | |
| CN103316540B (en) | A kind of fibrous filter and preparation method thereof and use the filter of this fibrous filter | |
| CN205495146U (en) | Compound filter screen of environmental protection multilayer | |
| CN208611987U (en) | It is a kind of for making the strainer of filter bag |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200115 Address after: 210031 No. 23 Liuzhou North Road, Jiangbei New District, Nanjing City, Jiangsu Province Applicant after: Nanjing State Environmental Protection Co.,Ltd. Address before: 210008 Sincerity Avenue 1800, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Applicant before: NANJING ZHONGDIAN ENERGY SAVING CO.,LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190129 |