CN109464855B - Air filtering structure - Google Patents
Air filtering structure Download PDFInfo
- Publication number
- CN109464855B CN109464855B CN201811639822.9A CN201811639822A CN109464855B CN 109464855 B CN109464855 B CN 109464855B CN 201811639822 A CN201811639822 A CN 201811639822A CN 109464855 B CN109464855 B CN 109464855B
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- China
- Prior art keywords
- ventilation
- assembly
- filter
- air
- sealed cavity
- 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.)
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- 238000001914 filtration Methods 0.000 title claims abstract description 18
- 238000009423 ventilation Methods 0.000 claims abstract description 59
- 238000000605 extraction Methods 0.000 claims abstract description 35
- 238000003860 storage Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 5
- 208000032544 Cicatrix Diseases 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 231100000241 scar Toxicity 0.000 abstract description 3
- 230000037387 scars Effects 0.000 abstract description 3
- 230000003313 weakening effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
-
- 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
- B01D46/42—Auxiliary equipment or operation thereof
-
- 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
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
-
- 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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to an air filtering structure, which comprises a filter sleeve, wherein a filter element is arranged in the filter sleeve, a ventilation assembly, an air extraction assembly and a pressurizing assembly are arranged above the filter sleeve, the ventilation assembly, the air extraction assembly and the pressurizing assembly are connected with the filter sleeve through a sealed cavity, a negative pressure output port and a ventilation port are arranged on the sealed cavity, and a positive pressure input port is arranged on the ventilation port, wherein the negative pressure output port is connected with the air extraction assembly. When the novel integrated pressure vessel is used, three parts are functionally overlapped and connected by utilizing the filter sleeve, a novel integrated structure is designed, the number of holes on the top of the pressure vessel is effectively reduced, the problem of weakening the strength of the top caused by the holes is also reduced, and scars caused by hole reinforcement are reduced. Meanwhile, the filter sleeve comprises a hollow seamless pipe, a plurality of filter cores are arranged in the seamless pipe, and the filter sleeve can be cleaned regularly and is simple and convenient.
Description
Technical Field
The invention relates to the technical field of air filters, in particular to an air filtering structure, and especially relates to an air filtering structure for a pneumatic mixer.
Background
In the prior art, the pneumatic mixer is often very complex, needs to be connected with a filtering structure and a pressure device respectively, is difficult to install, and causes huge volume of the pneumatic mixer.
Because the pressure device comprises positive pressure input and negative pressure input, the requirements on equipment are completely different, the pneumatic mixer, the filtering structure and the pressure device cannot be integrated, the transportation and installation cost is increased, the manufacturing cost is high, and the subsequent maintenance is not easy.
Disclosure of Invention
The invention aims to provide an improved air filtering structure which can overcome the defects that a filtering device and a pressure device cannot be integrated and have huge volume in the prior art.
In order to achieve the above object, the technical scheme of the present invention is as follows: an air filtration structure, characterized in that: the air filtering structure comprises a filter sleeve, a filter element is arranged in the filter sleeve, a ventilation assembly, an air extraction assembly and a pressurizing assembly are arranged above the filter sleeve, the ventilation assembly, the air extraction assembly and the pressurizing assembly are connected with the filter sleeve through a sealed cavity, a negative pressure output port and a ventilation port are arranged on the sealed cavity, a positive pressure input port is arranged on the ventilation port, the negative pressure output port is connected with the air extraction assembly, the ventilation port is connected with the ventilation assembly, and the positive pressure input port is connected with the pressurizing assembly; the filter sleeve comprises a hollow seamless pipe, an upper flange and a lower flange which are arranged at two ends of the seamless pipe, and a filter element tray which is arranged at the inner side of the upper flange and used for fixing a filter element; the pressurizing assembly comprises a gas storage bottle, one end of the gas storage bottle is connected with the sealed cavity through a gas valve, and the other end of the gas storage bottle is connected with the compressed air pipe; the ventilation assembly comprises a ventilation pipe and a ventilation valve arranged on the ventilation pipe; the air extraction assembly comprises an air extraction pipe and an air extraction valve arranged on the air extraction pipe.
Preferably, the upper flange inner side wall of the filter sleeve is provided with a group of grooves which are respectively a V-shaped groove, a square groove and an arc groove from top to bottom, the outer side wall of the filter core tray is provided with convex strips matched with the grooves, the filter core tray is provided with a plurality of filter stick setting holes, one end of each filter stick is provided with a cover body, and the cover body is clamped in each filter stick setting hole.
Further, an included angle is formed between the negative pressure output port and the air vent, the included angle is in the range of 30-65 degrees, and the air vent is perpendicularly intersected with the positive pressure input port; the ventilative mouthful sets up on the axis of sealed cavity, and ventilative mouthful links to each other with sealed cavity through ventilative pipeline, and the negative pressure delivery outlet links to each other with sealed cavity through the negative pressure pipeline of buckling, and the top of sealed cavity is the bellied circular arc lid that makes progress, and the volume ratio between negative pressure pipeline, the ventilative pipeline and the sealed cavity is 1:0.7-0.8:4-6; the bent negative pressure pipeline is connected with an exhaust pipe, and the exhaust pipe is arranged in parallel with the horizontal plane.
Further, the positive pressure input port is arranged at the 1/3-1/2 position of the height of the ventilation pipeline, the gas storage bottle is arranged in parallel with the horizontal plane, an included angle is formed between the gas valve and the gas storage bottle, the included angle range is 25-45 degrees, the gas storage bottle and the gas valve are connected through a two-way joint, the two-way joint comprises a horizontal connecting part and an oblique inserting connecting part, and an upward protruding bump is arranged at the bottom of the horizontal connecting part.
Furthermore, the upper flange and the sealing cavity are connected into a whole, a plurality of bolt fixing holes are arranged along the circumferences of the upper flange and the lower flange, and the upper flange and the lower flange are connected with the seamless pipe through bolts arranged in the bolt fixing holes.
Compared with the prior art, the technical scheme of the invention comprises a plurality of improvements in detail besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. According to the improved scheme, the filter element is arranged in the filter sleeve, the ventilation assembly, the air extraction assembly and the pressurizing assembly are arranged above the filter sleeve, the ventilation assembly, the air extraction assembly and the pressurizing assembly are connected with the filter sleeve through the sealing cavity, and the three components are functionally overlapped and connected by utilizing one filter sleeve, so that a brand new integrated structure is designed, the number of open holes in the top of the pressure container is effectively reduced, the problem of weakening the top strength caused by the open holes is also reduced, and scars caused by open hole reinforcement are reduced;
2. In the technical scheme of the invention, the filter sleeve comprises a hollow seamless pipe, and a plurality of filter elements are arranged in the seamless pipe, so that the filter sleeve can be cleaned regularly, and is simple and convenient;
3. The invention is provided with the sealed cavity, the ventilation opening is arranged on the central axis of the sealed cavity, the ventilation opening is connected with the sealed cavity through the ventilation pipeline, the negative pressure output port is connected with the sealed cavity through the bent negative pressure pipeline, and the top of the sealed cavity is an arc cover body protruding upwards, so that the whole structure is changed into a pressure-bearing structure and can be directly connected with the pressure container;
4. the invention has reasonable structural layout, good integrated effect, reduced production cost and convenient popularization and utilization.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of fig. 1.
FIG. 3 is a schematic diagram of an embodiment of the present invention.
Fig. 4 is a schematic view of the structure of the filter cartridge of the present invention.
Fig. 5 is a schematic view of yet another construction of the filter cartridge of the present invention.
Fig. 6 is a schematic view of the structure of the filter tray and cartridge of the present invention.
Fig. 7 is a schematic view of still another construction of the filter tray and cartridge of the present invention.
Fig. 8 is a schematic view of the sealed cavity of the present invention.
Fig. 9 is a schematic view of still another embodiment of the sealed cavity of the present invention.
Fig. 10 is a schematic structural view of the ventilation assembly of the present invention.
FIG. 11 is a schematic view of another construction of a ventilation assembly according to the present invention.
FIG. 12 is a schematic view of a pressing assembly according to the present invention.
FIG. 13 is a schematic view of another embodiment of the pressurizing assembly of the present invention.
FIG. 14 is a schematic view of an air extraction assembly according to the present invention.
FIG. 15 is a schematic view of another embodiment of the pumping assembly of the present invention.
Reference numerals:
1a filter sleeve, 2a ventilation assembly, 3 an air extraction assembly, 4a pressurizing assembly, 5a sealed cavity and 6 a filter element;
11 seamless pipe, 12 upper flange, 13 lower flange, 14 groove;
a 21 ventilation pipe and a 22 ventilation valve;
a31 exhaust pipe and a32 exhaust valve;
41 gas cylinder, 42 gas valve, 43 two-way joint, 44 bump;
a 51 negative pressure output port, a 52 ventilation port, and a 53 positive pressure input port;
61 cartridge tray.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention provides an air filtration structure, see in particular fig. 1, which differs from the prior art in that: the air filtering structure comprises a filter sleeve 1, a filter element is arranged in the filter sleeve, a ventilation assembly 2, an air extraction assembly 3 and a pressurizing assembly 4 are arranged above the filter sleeve, the ventilation assembly, the air extraction assembly and the pressurizing assembly are connected with the filter sleeve through a sealed cavity 5, a negative pressure output port 51 and a ventilation port 52 are arranged on the sealed cavity, a positive pressure input port 53 is arranged on the ventilation port, the negative pressure output port is connected with the air extraction assembly, the ventilation port is connected with the ventilation assembly, and the positive pressure input port is connected with the pressurizing assembly; the filter sleeve comprises a hollow seamless pipe 11 and upper and lower flanges 12 and 13 arranged at two ends of the seamless pipe, and a filter element tray 61 is arranged at the inner side of the upper flange and used for fixing a filter element 6; the pressurizing assembly comprises a gas storage bottle, one end of the gas storage bottle 41 is connected with the sealed cavity through a gas valve 42, and the other end of the gas storage bottle is connected with the compressed air pipe; the ventilation assembly comprises a ventilation pipe 21 and a ventilation valve 22 arranged on the ventilation pipe; the air extraction assembly comprises an air extraction pipe 31 and an air extraction valve 32 arranged on the air extraction pipe.
Specifically, the invention designs a brand new integrated structure by using a filter sleeve to functionally stack and connect three components, so that the number of openings at the top of the pressure container is effectively reduced, the problem of weakening the strength of the top caused by the openings is also reduced, and scars caused by opening reinforcement are reduced.
Meanwhile, the filter sleeve comprises a hollow seamless pipe, a plurality of filter cores are arranged in the seamless pipe, and the filter sleeve can be cleaned regularly and is simple and convenient. The ventilation opening is arranged on the central axis of the sealed cavity, the ventilation opening is connected with the sealed cavity through a ventilation pipeline, the negative pressure output port is connected with the sealed cavity through a bent negative pressure pipeline, and the top of the sealed cavity is an arc cover body protruding upwards, so that the whole structure is changed into a pressure-bearing structure, and the pressure-bearing structure can be directly connected with a pressure container.
In one embodiment, the invention regards the three functions of ventilation filtration, positive pressure input and negative pressure output as positive pressure transmission (negative pressure output can be regarded as reverse positive pressure transmission), stacks the three functions together by using the same filter, and designs a brand new integrated structure assembly structure strictly according to GB150 and related pressure container standards.
Specifically, the ventilation assembly comprises a ventilation pipe and a ventilation valve arranged on the ventilation pipe, wherein the top end of the protruding pipe is bent downwards to further prevent external dust from entering, and meanwhile, the connection and disconnection between the inside of the container and the external air are controlled through opening and closing of the valve.
The air extraction assembly comprises an air extraction pipe and an air extraction valve arranged on the air extraction pipe. The air extraction valve is used for controlling the connection and disconnection of the air extraction pipe and the interior of the container; the exhaust pipe is used for connecting negative pressure generating equipment such as a vacuum pump. When the negative pressure is required to be pumped to the container, the ventilation valve and the pressurization valve are closed, the suction valve is opened, and the vacuum pump is operated, so that the inside of the container can be changed into a negative pressure state through the suction pipe.
The filter sleeve is of a locking structure with flanges welded at two ends, an upper flange of the filter sleeve is in butt joint with a sealing cavity, a group of grooves with special structures are formed in the inner side wall of the upper flange, the grooves are respectively a V-shaped groove, a square groove and an arc groove from top to bottom, and the depth ratio of the V-shaped groove, the square groove and the arc groove is 1:1.1:0.85, the diameter of V type slot > the diameter of square slot > the diameter of convex slot, and the slot of this kind of special structure not only makes sealed effect better, and under the condition of not being positive pressure or negative pressure, even take place slight upward or downward warpage, can both guarantee the leakproofness, be convenient for installation and opening simultaneously.
The lateral wall of filter core tray is equipped with and cooperatees the sand grip with the slot, can bear the setting of filter core after both cooperations, keeps the leakproofness simultaneously, is equipped with a plurality of filter rod setting hole on the filter core tray, generally can set up 4-8, carries out evenly distributed along the centre of a circle of filter core tray, and the one end of filter rod is equipped with the lid, and the lid card is established in the filter rod setting hole. During installation, a plurality of filter rods are installed on the filter element tray, the tray is fixed at the upper flange groove of the filter sleeve, and the filter element is used for removing dust particles in the passing air.
In another embodiment, the ventilation port, the positive pressure input port and the negative pressure output port are welded on the sealing cavity, the bottom is a flange with a special structure, and the filter core tray can be fixed by being in butt joint with the filter sleeve and being pressed tightly.
An included angle is formed between the negative pressure output port and the air vent, the included angle is 30-65 degrees, and the air vent is vertically intersected with the positive pressure input port; the ventilative mouthful sets up on the axis of sealed cavity, and ventilative mouthful links to each other with sealed cavity through ventilative pipeline, and the negative pressure delivery outlet links to each other with sealed cavity through the negative pressure pipeline of buckling, and the top of sealed cavity is the bellied circular arc lid that makes progress, and the volume ratio between negative pressure pipeline, the ventilative pipeline and the sealed cavity is 1:0.7-0.8:4-6, preferably 1:0.8:5, can ensure that the whole sealing cavity is kept unchanged in sealing under negative pressure or positive pressure; the bent negative pressure pipeline is connected with an exhaust pipe, and the exhaust pipe is arranged in parallel with the horizontal plane.
Further, the positive pressure input port is arranged at 1/3-1/2 of the height of the ventilation pipeline, the gas storage bottle is arranged in parallel with the horizontal plane, an included angle is formed between the gas valve and the gas storage bottle, the included angle range is 25-45 degrees, the preferred angle is 35 degrees, the gas storage bottle and the gas valve are connected through a two-way joint 43, the two-way joint comprises a horizontal connecting part and an oblique inserting connecting part, the bottom of the horizontal connecting part is provided with an upward protruding lug 44, the middle part of the lug is high, the periphery is low, and the gas storage bottle is island-shaped, wherein the topmost end of the middle higher part corresponds to the bottommost end of the oblique inserting connecting part.
Specifically, the pressurizing assembly consists of a gas valve and a gas cylinder. The air valve is used for controlling the connection and disconnection of the compressed air pipeline; one end of the gas storage bottle is connected with the gas valve, and the other end of the gas storage bottle is connected with the compressed air pipeline to ensure that the pressure of the compressed air input into the sealed cavity is not reduced at the moment of opening the gas valve.
When the container is normally ventilated and vacuumized, air in the container can drive a small amount of material dust to move and stick to the surface of the filter rod, so that the filter rod is blocked. At the moment, the ventilation valve and the extraction valve are required to be closed, and meanwhile, the air valve of the pressurizing assembly acts in a pulse mode of on-off-on-off …, pulse compressed air is instantaneously injected into the sealed cavity, and dust attached to the surface of the filter rod is reversely blown back into the container, so that the function of cleaning the filter rod is achieved; if the air valve of the pressurizing assembly is continuously opened, the container is pressurized, so that the inside of the container is in a positive pressure state.
Furthermore, the upper flange and the sealing cavity are connected into a whole, a plurality of bolt fixing holes are arranged along the circumferences of the upper flange and the lower flange, and the upper flange and the lower flange are connected with the seamless pipe through bolts arranged in the bolt fixing holes.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (3)
1. An air filtration structure, characterized in that: the air filtering structure comprises a filter sleeve, a filter element is arranged in the filter sleeve, a ventilation assembly, an air extraction assembly and a pressurizing assembly are arranged above the filter sleeve, the ventilation assembly, the air extraction assembly and the pressurizing assembly are connected with the filter sleeve through a sealed cavity, a negative pressure output port and a ventilation port are arranged on the sealed cavity, a positive pressure input port is arranged on the ventilation port, the negative pressure output port is connected with the air extraction assembly, the ventilation port is connected with the ventilation assembly, and the positive pressure input port is connected with the pressurizing assembly; the filter sleeve comprises a hollow seamless pipe, an upper flange and a lower flange which are arranged at two ends of the seamless pipe, and a filter element tray which is arranged at the inner side of the upper flange and used for fixing a filter element; the pressurizing assembly comprises a gas storage bottle, one end of the gas storage bottle is connected with the sealed cavity through a gas valve, and the other end of the gas storage bottle is connected with the compressed air pipe; the ventilation assembly comprises a ventilation pipe and a ventilation valve arranged on the ventilation pipe;
the top end of the protruding pipe is bent downwards to prevent external dust from entering, and the connection and disconnection between the inside of the container and the external air are controlled by opening the valve;
The air extraction component comprises an air extraction pipe and an air extraction valve arranged on the air extraction pipe;
The inner side wall of the upper flange of the filter sleeve is provided with a group of grooves which are respectively a V-shaped groove, a square groove and an arc groove from top to bottom, the outer side wall of the filter core tray is provided with convex strips matched with the grooves, the filter core tray is provided with a plurality of filter stick setting holes, one end of each filter stick is provided with a cover body, and the cover body is clamped in each filter stick setting hole;
The ratio of the depths of the V-shaped groove, the square groove and the circular arc groove is 1:1.1:0.85, the diameter of the V-shaped groove is larger than the diameter of the square groove and larger than the diameter of the circular arc groove;
An included angle is formed between the negative pressure output port and the air vent, the included angle is 30-65 degrees, and the air vent is vertically intersected with the positive pressure input port; the ventilative mouthful sets up on the axis of sealed cavity, and ventilative mouthful links to each other with sealed cavity through ventilative pipeline, and the negative pressure delivery outlet links to each other with sealed cavity through the negative pressure pipeline of buckling, and the top of sealed cavity is the bellied circular arc lid that makes progress, and the volume ratio between negative pressure pipeline, the ventilative pipeline and the sealed cavity is 1:0.7-0.8:4-6; the bent negative pressure pipeline is connected with an exhaust pipe, and the exhaust pipe is arranged in parallel with the horizontal plane.
2. An air filtration structure according to claim 1, wherein: the positive pressure input port is arranged at 1/3-1/2 of the height of the ventilation pipeline, the gas storage bottle is arranged in parallel with the horizontal plane, an included angle is formed between the gas valve and the gas storage bottle, the included angle range is 25-45 degrees, the gas storage bottle and the gas valve are connected through a two-way joint, the two-way joint comprises a horizontal connecting part and an oblique inserting connecting part, and an upward protruding bump is arranged at the bottom of the horizontal connecting part.
3. An air filtration structure according to claim 1, wherein: the upper flange and the sealing cavity are connected into a whole, a plurality of bolt fixing holes are arranged along the circumferences of the upper flange and the lower flange, and the upper flange and the lower flange are connected with the seamless pipe through bolts arranged in the bolt fixing holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639822.9A CN109464855B (en) | 2018-12-29 | 2018-12-29 | Air filtering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639822.9A CN109464855B (en) | 2018-12-29 | 2018-12-29 | Air filtering structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109464855A CN109464855A (en) | 2019-03-15 |
| CN109464855B true CN109464855B (en) | 2024-05-03 |
Family
ID=65677961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811639822.9A Active CN109464855B (en) | 2018-12-29 | 2018-12-29 | Air filtering structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109464855B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205495198U (en) * | 2015-11-30 | 2016-08-24 | 上海琅科环保设备有限公司 | Diaphragm type dust filter system |
| CN209423159U (en) * | 2018-12-29 | 2019-09-24 | 昆山博正攀巨包装设备有限公司 | A kind of air filtration structure |
-
2018
- 2018-12-29 CN CN201811639822.9A patent/CN109464855B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205495198U (en) * | 2015-11-30 | 2016-08-24 | 上海琅科环保设备有限公司 | Diaphragm type dust filter system |
| CN209423159U (en) * | 2018-12-29 | 2019-09-24 | 昆山博正攀巨包装设备有限公司 | A kind of air filtration structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109464855A (en) | 2019-03-15 |
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