CN107050958B - Filter element - Google Patents
Filter element Download PDFInfo
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- CN107050958B CN107050958B CN201710343685.3A CN201710343685A CN107050958B CN 107050958 B CN107050958 B CN 107050958B CN 201710343685 A CN201710343685 A CN 201710343685A CN 107050958 B CN107050958 B CN 107050958B
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- Prior art keywords
- filter element
- filter
- inner cavity
- cartridge
- port
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- 238000000034 method Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 35
- 238000004806 packaging method and process Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012065 filter cake Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
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- 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
- B01D29/114—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 arranged for inward flow filtration
-
- 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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- 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
- B01D46/62—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 series
- B01D46/64—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 series arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/34—Seals or gaskets for filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/40—Special measures for connecting different parts of the filter
- B01D2201/4038—Special measures for connecting different parts of the filter for connecting at least two filtering elements together
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2271/02—Gaskets, sealings
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a filter element, which solves the technical problems of the prior art that the filtering area of the filter element is increased and the packaging and transportation costs of the filter element are reduced. The filter element comprises: a first filter element; and optionally a second cartridge in one of two states of retraction into and extraction from the first cartridge; when the filter is in operation, the second filter element is in a state of being extracted from the first filter element and is connected with the first filter element into a whole. In the processes of packaging, transporting and the like, the filter element is transferred from the filter element manufacturing place to the filter element using place, and the second filter element is retracted into the first filter element, so that the packaging cost is reduced, the transportation space occupied by a single filter element is reduced, and the transportation cost is reduced; when the filter element works, the second filter element is extracted from the first filter element and is connected with the first filter element into a whole, so that the filtering area of the whole filter element is equal to the sum of the filtering area of the first filter element and the filtering area of the second filter element, and the total filtering area of the filter element is improved.
Description
Technical Field
The invention relates to the technical field of filtration, in particular to a filter element.
Background
The filtration area is an important index for evaluating the performance of the filter element. The larger the filtering area, the more the filter element can process the objects to be filtered in unit time. Under the condition of not changing the structure of the filter element, the size of the filter element can only be increased in order to increase the filtering area of the filter element. For example, the applicant of the present invention has developed a tubular filter element having a length longer than that of the existing tubular filter element in order to increase the filtering area of the tubular filter element during actual production and operation. In the case of identical diameters, the tubular filter element developed by the applicant of the present invention has a larger filtration area than the existing tubular filter element due to the increase in length.
However, the larger the cartridge size, the higher the packaging, shipping costs and risk of damage to transfer the cartridge from the cartridge manufacturing site to the cartridge service site. In addition, the filtering area of the filter element is increased by increasing the size of the filter element, so that the filtering uniformity on the whole filtering surface of the filter element is further influenced; especially, when the filter element is subjected to backflushing regeneration, the uneven degree of the pressure of the backflushing medium on the back side of the whole filter surface of the filter element is increased, the backflushing regeneration of the part with lower pressure is incomplete, and the filtering uniformity on the whole filter surface of the filter element is further deteriorated.
Disclosure of Invention
The invention mainly aims to provide a filter element, which solves the technical problems of contradiction between increasing the filtering area of the filter element and reducing the packaging and transportation costs of the filter element in the prior art.
In order to achieve the above object, a filter cartridge is provided. The filter element comprises: a first filter element; and optionally a second cartridge in one of two states of retraction into and extraction from the first cartridge; when the filter is in operation, the second filter element is in a state of being extracted from the first filter element and is connected with the first filter element into a whole.
Further, the first filter element includes a first interior cavity defined by a first sidewall having a filter material and a first port in communication with the first interior cavity; the second filter element comprises a second inner cavity and a second port, wherein the second inner cavity is formed by surrounding a second side wall which is parallel to the first side wall and provided with a filter material, and the second port is communicated with the second inner cavity; the end part of the first inner cavity is also provided with a channel for the second filter element to enter into and exit from the first inner cavity, and when the second filter element is extracted from the first filter element through the channel and is connected with the first filter element into a whole, the second port is communicated with the first inner cavity through the channel.
Further, the inner wall of the channel is provided with a first check ring, the outer wall of the second port is provided with a second check ring which is used for contacting with the first check ring in the process of extracting the second filter element from the first filter element so as to limit the extraction movement of the second filter element, and a contact sealing structure and a connecting structure for connecting the first check ring with the second check ring are arranged between the first check ring and the second check ring.
Further, through holes are formed in the first check ring at intervals along the circumferential direction of the first check ring, and threaded holes corresponding to the through holes one by one are formed in the second check ring; the connection structure comprises screws which pass through the through holes from the outer side of the first check ring respectively and are connected with the corresponding threaded holes in an adapting way.
Further, the contact sealing structure comprises a sealing ring arranged on the end face of the first check ring and/or the second check ring.
Further, one end of the second filter element opposite to the second port is a closed end; the second filter element is drawn from the first filter element through the passageway and connected to the first filter element as a unit to form a terminal filter element having the first port as the filtered material outlet and also as the backflushing medium inlet.
Further, when the second filter element is drawn out from the first filter element through the channel and is connected with the first filter element into a whole, the ratio of the volume of the first inner cavity to the volume of the second inner cavity is controlled to be between 0.6 and 1.3.
Further, when the second filter element is drawn out from the first filter element through the channel and is connected with the first filter element into a whole, the ratio of the volume of the first inner cavity to the volume of the second inner cavity is controlled to be between 0.7 and 0.9.
Further, the first side wall and the second side wall are both cylinders; when the second filter element is retracted into the first filter element, the two cylinders are sleeved, and when the second filter element is extracted from the first filter element through the channel and is connected with the first filter element into a whole, the two cylinders are butted into a reducer long cylinder.
Further, the first cartridge also includes a fitting disposed at the first port for mounting the cartridge to a filter.
In the processes of packaging, transporting and the like, the filter element is transferred from the filter element manufacturing place to the filter element using place, and the second filter element is retracted into the first filter element, so that the packaging cost is reduced, the transportation space occupied by a single filter element is reduced, and the transportation cost is reduced. After the filter element is installed on the filter, when the filter element works, the second filter element is pulled out from the first filter element and is connected with the first filter element into a whole, so that the filtering area of the whole filter element is equal to the sum of the filtering area of the first filter element and the filtering area of the second filter element, and the total filtering area of the filter element is improved. Therefore, the filter element successfully solves the technical problems of contradiction between increasing the filtering area of the filter element and reducing the packaging and transportation cost of the filter element.
The invention is further described below with reference to the drawings and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part hereof, are shown by way of illustration and not of limitation, and in which are shown by way of illustration and description of the invention. In the drawings:
fig. 1 is a schematic view of a filter cartridge of the present invention with a second filter cartridge retracted within a first filter cartridge.
Fig. 2 is a schematic view of the cartridge of fig. 1 as the second cartridge is withdrawn from and connected to the first cartridge.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be noted in particular that:
the technical solutions and technical features provided in the sections including the following description in the present invention may be combined with each other without conflict.
In addition, the embodiments of the invention that are referred to in the following description are typically only some, but not all, embodiments of the invention. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
Terms and units in relation to the present invention. The terms "comprising," "having," and any variations thereof in the description and claims of the invention and in the relevant sections are intended to cover a non-exclusive inclusion.
Fig. 1 is a schematic view of a filter cartridge of the present invention with a second filter cartridge retracted within a first filter cartridge. Fig. 2 is a schematic view of the cartridge of fig. 1 as the second cartridge is withdrawn from and connected to the first cartridge. As shown in fig. 1 and 2, the filter cartridge of the present invention includes: a first filter element 110; and optionally a second cartridge 120 in one of two states retracted into the first cartridge 110 and extracted from the first cartridge 110; in operation, the second filter element 120 is withdrawn from the first filter element 110 and is integrally connected to the first filter element 110.
The filter element has the following advantages: in the process of packaging, transporting and the like, the filter element is transferred from the filter element manufacturing place to the filter element using place, and the second filter element 120 is retracted into the first filter element 110, so that the packaging cost is reduced, the transportation space occupied by a single filter element is reduced, and the transportation cost is reduced. After the filter element is installed on the filter, when the filter element works, the second filter element 120 is drawn out from the first filter element 110 and is connected with the first filter element 110 into a whole, so that the filtering area of the whole filter element is equal to the sum of the filtering area of the first filter element 110 and the filtering area of the second filter element 120, and the total filtering area of the filter element is improved.
As shown in fig. 1 and 2, in a preferred embodiment of the present invention, the first filter element 110 includes a first inner cavity 111 defined by a first sidewall having a filter material and a first port 112 in communication with the first inner cavity 111; the second filter element 120 includes a second inner cavity 121 surrounded by a second side wall parallel to the first side wall and having a filter material, and a second port 122 communicating with the second inner cavity 121; a passage through which the second filter element 120 enters and exits the first inner chamber 111 is further provided at an end of the first inner chamber 111, and the second port 122 is in communication with the first inner chamber 111 through the passage when the second filter element 120 is drawn out of the first filter element 110 through the passage and connected to the first filter element 110 as a whole.
As shown in fig. 1 and 2, in the above embodiment, the inner wall of the channel is further provided with a first retainer 113, and the outer wall of the second port 122 is provided with a second retainer 123 for contacting the first retainer 113 during the process of extracting the second filter element 120 from the first filter element 110, so as to limit the extracting motion of the second filter element 120, and a contact sealing structure is provided between the first retainer 113 and the second retainer 123, and a connection structure is provided for connecting the first retainer 113 and the second retainer 123 together.
Wherein, as an implementation mode of the connection structure, through holes are arranged on the first check ring 113 at intervals along the circumferential direction of the first check ring, and threaded holes corresponding to the through holes one by one are arranged on the second check ring 123; the connection structure comprises screws which pass through the through holes from the outer side of the first check ring respectively and are connected with the corresponding threaded holes in an adapting way. In addition, as an embodiment of the contact seal structure, the contact seal structure includes a seal ring 124 provided at an end face of the second retainer ring 123.
Due to the arrangement of the first check ring 113 and the second check ring 123, in the process of extracting the second filter element 120 from the first filter element 110, when the second check ring 123 contacts with the first check ring 113, the second filter element 120 cannot be further extracted from the first filter element 110, so that the second filter element 120 is prevented from being completely separated from the first filter element 110, and the second filter element 120 and the first filter element 110 can be more conveniently connected into a whole.
When the connection structure of the above embodiment is adopted, the operation can be easily performed directly from the outside of the cartridge and the second cartridge 120 can be firmly connected with the first cartridge 110. Since the sealing ring 124 is provided at the end surface of the second retainer ring 123, when the second retainer ring 123 contacts the first retainer ring 113 and is connected by the above-mentioned connection structure, the sealing ring 124 is compressed between the second retainer ring 123 and the first retainer ring 113, thereby achieving sealing.
In one embodiment of the invention, as shown in fig. 1 and 2, the end of the second filter element 120 opposite the second port 122 is a closed end; the second cartridge 120, when withdrawn from the first cartridge 110 through the passageway and connected to the first cartridge 110 as a unit, forms a terminal filter cartridge having the first port 112 as the filtered material outlet and also as the backflushing medium inlet.
Of course, the second filter element 120 may also be formed as a cross-flow filter element if the end thereof opposite the second port 122 is still open. The terms "terminal filtering" and "cross-flow filtering" are common terms in the art, where "terminal filtering" is also commonly referred to as "dead-end filtering".
When the filter element is the terminal filtering filter element, the working mode of the filter element is as follows: during filtration, the substance to be filtered moves from the outside of the filter element to the inside of the filter element under the action of pressure, a part of the substance penetrates through the filter material of the first filter element 110 and the filter material of the second filter element 120 from outside to inside and then enters the first inner cavity 111 and the second inner cavity 121 to become filtered substance, the filtered substance is discharged out of the filter element from the first port 112, and meanwhile, a filter cake formed by accumulating filtered impurities is gradually formed on the filter material of the first filter element 110 and the filter material of the second filter element 120; when the formation of the filter cake significantly affects the filtration flux, a backflushing regeneration is initiated, i.e. a backflushing medium of a certain pressure is injected into the filter cartridge from the first port 112, which backflushing medium in turn penetrates the filter material of the first filter cartridge 110 from inside to outside and the filter material of the second filter cartridge 120 peels off the attached filter cake.
When the filter element is used as the terminal filtering filter element, the filter element can be favorable for the backflushing regeneration of the filter element. This is because the pressure of the backflushing medium will gradually decay in the depth direction of the filter cartridge (i.e. from the filtered output towards the closed end opposite the filtered output) as it enters the terminating filter cartridge from the filtered output, but because the cross-sectional area of the second lumen 121 is smaller than that of the first lumen 111 in the present invention, the pressure of the backflushing medium can be increased by the contraction of the cross-sectional area as it enters the second lumen 121 from the first lumen 111, thereby compensating for the decay of the backflushing medium to some extent.
The problem of poorer permeability of the terminal filter element, especially as a gas-solid separation filter element, often occurs when the terminal filter element is used for a period of time, as the filter element is closer to the closed end of the filter element. This problem is caused on the one hand by the gradual attenuation of the pressure of the backflushing medium after it enters the terminal filter cartridge from the filtered product outlet, and on the other hand by the non-uniform concentration distribution of the solid impurities in the product to be filtered (generally, the concentration of the solid impurities in the product to be filtered contacted by the closed end of the cartridge is greater). In this regard, in one embodiment of the present invention, the technical means is also adopted such that, after the second filter element 120 is drawn out from the first filter element 110 through the passage and integrally connected to the first filter element 110, the ratio of the volume of the first inner chamber 111 to the volume of the second inner chamber 121 is set so as to be capable of controlling the ratio of the average pressure of the backflushing medium in the first inner chamber 111 to the average pressure of the backflushing medium in the second inner chamber 121 to be between 0.6 and 1.3, more preferably between 0.7 and 0.9.
Experiments show that the ratio of the average pressure of the backflushing medium in the first inner cavity 111 to the average pressure of the backflushing medium in the second inner cavity 121 is controlled between 0.6 and 1.3 by setting the ratio of the volume of the first inner cavity 111 to the volume of the second inner cavity 121, so that the thickness of a filter cake layer on the surface of the whole filter element can be ensured to be uniform. If the ratio of the average pressure of the backflushing medium in the first inner chamber 111 to the average pressure of the backflushing medium in the second inner chamber 121 is controlled to be less than 0.6, the volume of the second inner chamber 121 is significantly reduced, resulting in a significantly reduced filtration area of the second filter element 120; and the average pressure ratio of the backflushing medium in the first inner cavity 111 to the average pressure ratio of the backflushing medium in the second inner cavity 121 is controlled to be more than 1.3, the thickness uniformity of the filter cake layer on the surface of the filter core cannot meet the requirement. The ratio of the average pressure of the backflushing medium in the first inner cavity 111 to the average pressure of the backflushing medium in the second inner cavity 121 is controlled to be 0.7-0.9, namely, the average pressure of the backflushing medium in the second inner cavity 121 is slightly larger than the average pressure of the backflushing medium in the first inner cavity 111, so that the filtering area of the second filter element 120 is ensured, and meanwhile, the problem of poor permeability of the closed end of the filter element can be effectively solved.
In one embodiment of the present invention, the first side wall and the second side wall are both cylinders; when the second filter element 120 is retracted into the first filter element 110, the two cylinders are sleeved, and when the second filter element 120 is extracted from the first filter element 110 through the channel and connected with the first filter element 110 into a whole, the two cylinders are butted into a reducer long cylinder.
In addition, to facilitate installation of the cartridge, the first cartridge 110 further includes a fitting 114 disposed at the first port 112 for mounting the cartridge to a filter.
Claims (7)
1. A filter cartridge, comprising:
a first filter element; and
a second filter element which is retractable into the first filter element and is extractable from the first filter element;
when the filter is in operation, the second filter element is in a state of being extracted from the first filter element and is connected with the first filter element into a whole;
the first filter element comprises a first inner cavity surrounded by a first side wall with a filter material and a first port communicated with the first inner cavity; the second filter element comprises a second inner cavity and a second port, wherein the second inner cavity is formed by surrounding a second side wall which is parallel to the first side wall and provided with a filter material, and the second port is communicated with the second inner cavity; the end part of the first inner cavity is also provided with a channel for the second filter element to enter into and exit from the first inner cavity, and when the second filter element is extracted from the first filter element through the channel and is connected with the first filter element into a whole, the second port is communicated with the first inner cavity through the channel;
one end of the second filter element opposite to the second port is a closed end; when the second filter element is drawn out from the first filter element through the channel and is connected with the first filter element into a whole, the whole forms a terminal filter element which takes the first port as a filtered object output port and also serves as a backflushing medium input port;
when the second filter element is drawn out from the first filter element through the channel and is connected with the first filter element into a whole, the ratio of the volume of the first inner cavity to the volume of the second inner cavity is controlled to be between 0.6 and 1.3.
2. A filter cartridge as recited in claim 1, wherein: the inner wall of passageway is provided with first retaining ring, the outer wall of second port is provided with and is used for carrying out spacing second retaining ring to the extraction motion of second filter core at the in-process that the second filter core was taken out from first filter core with first retaining ring contact, have contact seal structure and be used for connecting together first retaining ring and second retaining ring connection structure between first retaining ring and the second retaining ring.
3. A filter cartridge as recited in claim 2, wherein: the first check ring is provided with through holes which are arranged at intervals along the circumferential direction of the first check ring, and the second check ring is provided with threaded holes which are in one-to-one correspondence with the through holes; the connection structure comprises screws which pass through the through holes from the outer side of the first check ring respectively and are connected with the corresponding threaded holes in an adapting way.
4. A filter cartridge as recited in claim 2, wherein: the contact sealing structure comprises a sealing ring arranged on the end face of the first check ring and/or the second check ring.
5. A filter cartridge as recited in claim 1, wherein: when the second filter element is drawn out from the first filter element through the channel and is connected with the first filter element into a whole, the ratio of the volume of the first inner cavity to the volume of the second inner cavity is controlled to be between 0.7 and 0.9.
6. A filter cartridge as recited in claim 1, wherein: the first side wall and the second side wall are both cylinders; when the second filter element is retracted into the first filter element, the two cylinders are sleeved, and when the second filter element is extracted from the first filter element through the channel and is connected with the first filter element into a whole, the two cylinders are butted into a reducer long cylinder.
7. A filter cartridge as recited in claim 1, wherein: the first cartridge also includes a fitting disposed at the first port for mounting the cartridge to a filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710343685.3A CN107050958B (en) | 2017-05-16 | 2017-05-16 | Filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710343685.3A CN107050958B (en) | 2017-05-16 | 2017-05-16 | Filter element |
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| Publication Number | Publication Date |
|---|---|
| CN107050958A CN107050958A (en) | 2017-08-18 |
| CN107050958B true CN107050958B (en) | 2023-05-09 |
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| CN201710343685.3A Active CN107050958B (en) | 2017-05-16 | 2017-05-16 | Filter element |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214898B (en) * | 2018-11-23 | 2022-09-30 | 株式会社 Unilok | Composite filter |
| CN118320526B (en) * | 2024-06-17 | 2024-10-18 | 仪征仪联过滤器材有限公司 | Telescopic filter element |
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| AU763184B2 (en) * | 1999-10-20 | 2003-07-17 | Jui-Fa Huang | Air filtering device for a vehicle engine |
| US20050252838A1 (en) * | 2004-05-13 | 2005-11-17 | Baldwin Filters, Inc. | Fluid filtration apparatus and method |
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|---|---|---|---|---|
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