CN211158795U - Front-mounted backwashing filter - Google Patents
Front-mounted backwashing filter Download PDFInfo
- Publication number
- CN211158795U CN211158795U CN201920716884.9U CN201920716884U CN211158795U CN 211158795 U CN211158795 U CN 211158795U CN 201920716884 U CN201920716884 U CN 201920716884U CN 211158795 U CN211158795 U CN 211158795U
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- Prior art keywords
- scraping
- filter
- filter element
- barrel
- lifting rod
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- 238000011001 backwashing Methods 0.000 title claims description 27
- 238000007790 scraping Methods 0.000 claims abstract description 71
- 238000005406 washing Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 230000003028 elevating effect Effects 0.000 claims abstract 2
- 239000010865 sewage Substances 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 7
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 239000008399 tap water Substances 0.000 description 7
- 235000020679 tap water Nutrition 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
The utility model provides a leading back flush filter. It has solved current technical problem. This leading back flush filter, including being hollow outer barrel, outer barrel upper end be connected with the end cover that has water inlet and delivery port, outer barrel lower extreme be equipped with the drain, be equipped with in outer barrel and be the tube-shape and with the coaxial filter core that sets up of outer barrel, filter core circumference cover and be equipped with the filter screen, filter core and outer barrel relatively fixed in axial direction, the circumference outside cover of filter core be located the urceolus internal and can the reciprocal lift of axial and circumferential direction scrape wash the barrel, scrape wash the barrel and link to each other with the end cover through the elevating system who sets up at the filter core middle part, just scrape the bottom side of washing the barrel be equipped with and when scraping the blowdown structure that can be linked together with the drain when washing the barrel lift, the circumference lateral part of scraping the washing barrel be equipped with and scrape the washing subassembly. The utility model has the advantages of easy cleaning of the filter screen, convenient pollution discharge and the like.
Description
Technical Field
The utility model belongs to the technical field of the filter, especially, relate to a leading back flush filter.
Background
With the continuous improvement of the living standard of people, people pay more and more attention to the quality of their own life, and the quality of household water is also paid more and more attention to by people, and although tap water is subjected to water purification measures such as sterilization, filtration and disinfection in a tap water plant before being supplied to reach the drinking water standard, because the purification measures of the tap water plant are only basic measures and flow through a tap water supply pipeline with long service time in the tap water supply process, more dirt is always generated in the pipeline because the tap water is not cleaned for a long time, and the tap water supplied to families often contains many bacteria and pollutants, so more and more families begin to use drinking water filters.
The filter has impurity to remain on the filter screen at the in-process that uses, so traditional filter screen needs the user to tear open regularly and washes, uses very inconveniently, causes user's trouble to when clean blowdown, need open the blowoff valve is manual, very inconvenient.
In order to solve the above technical problems, people have long searched for, for example, chinese patent discloses an integrated stepped direct drinking water treatment system [ application No.: CN201710345272.9], including the inlet tube that is used for with water piping connection, be used for with the outlet pipe of user terminal connection, filter, ultraviolet sterilizer, water storage box, ozone sterilizer connect gradually between inlet tube and the outlet pipe, the side of ozone sterilizer is equipped with the water pump, the inlet tube on be equipped with into water solenoid valve, the check valve of intaking, the outlet pipe on be equipped with out water check valve, go out the water solenoid valve.
The solution described above improves to some extent some of the problems of the prior art, but it also has at least the following drawbacks: the filter screen is difficult to clean, and the blowdown is inconvenient.
Disclosure of Invention
The utility model aims at the above problem, provide an easy clean and convenient leading back flush filter of blowdown of filter screen.
In order to achieve the above purpose, the utility model adopts the following technical proposal: the preposed back washing filter comprises a hollow outer barrel, wherein the upper end of the outer barrel is connected with an end cover with a water inlet and a water outlet, the lower end of the outer barrel is provided with a sewage discharge outlet, a cylindrical filter element which is coaxial with the outer barrel is arranged in the outer barrel, a filter screen is circumferentially covered on the filter element, a raw water cavity which is annular and is communicated with the water inlet is formed at the circumferential outer side of the filter element and the circumferential inner side of the outer barrel, a purified water cavity communicated with the water outlet is formed at the circumferential inner side of the lifting filter element, the filter element and the outer barrel are relatively fixed in the axial direction, a scraping and washing barrel which is positioned in the outer barrel and can axially reciprocate and circumferentially rotate is sleeved at the circumferential outer side of the filter element, the scraping and washing barrel is connected with the end cover through a lifting mechanism arranged in the middle of the filter element, a sewage discharge structure which can be communicated with the sewage discharge outlet when, and the circumferential side part of the scraping and washing cylinder body is provided with a scraping and washing assembly.
The scraping and washing barrel can rotate circumferentially to clean the filter element, and the lifting mechanism can lift the scraping and washing barrel, so that larger-area scraping and washing can be realized in the axial direction in the rotating process, the cleaning effect is improved, and the cleaning is convenient; after the scraping and washing barrel body is lifted, the drain outlet can be directly communicated with the scraping and washing barrel body, so that sewage can be directly discharged, a sewage discharge valve does not need to be manually opened, the sewage discharge efficiency is improved, and the sewage discharge is convenient.
In the front backwashing filter, the lifting mechanism comprises a lifting rod body penetrating through the middle part of the filter element, one end of the lifting rod body is in threaded connection with a rotary seat on the end cover, a lifting driving assembly is further arranged between the rotary seat and the end cover, and the other end of the lifting rod body extends out of the bottom side of the filter element and is fixedly connected with the scraping and washing barrel body through a plug-in type circumferential fixing assembly. The lifting rod body is in threaded connection with the rotary seat, and the lifting rod body is rotated by the lifting driving assembly to rotate, so that scraping and washing and pollution discharge are realized.
In the front backwashing filter, the lifting driving component comprises a driving pin which is rotatably connected in the rotary base, the lower end of the driving pin penetrates through a pin hole formed in the top side of the lifting rod body, the driving pin and the lifting rod body are circumferentially and relatively fixed, and the upper end of the driving pin extends out of the rotary base and is circumferentially and fixedly connected with a rotary cover arranged above the rotary base. The driving pin is driven to rotate by rotating the rotary cover, then the driving pin drives the lifting rod body to rotate and lift, and the lifting rod body can be lifted while rotating due to the fact that the lifting rod body is in threaded connection with the rotary base.
In the front backwashing filter, the plug-in type circumferential fixing component comprises a plurality of positioning sheets arranged on the scraping and washing barrel, the lifting rod body is provided with a plurality of positioning grooves corresponding to the positioning sheets, and the positioning sheets are inserted in the positioning grooves. The circumference that can realize the body of rod and scrape the barrel that goes up and down through constant head tank and spacer is fixed to make the rotation more smooth, and the combination is convenient.
In the preposed backwashing filter, the positioning grooves and the positioning sheets are respectively in an annular array, and the lifting rod body and the scraping and washing cylinder body are coaxially arranged and a fastening screw is arranged between the lifting rod body and the scraping and washing cylinder body in a penetrating manner. The axial fixation of the lifting rod body and the scraping and washing barrel body can be realized through the fastening screws.
In the preposed backwashing filter, the sewage discharge structure comprises a plurality of sewage discharge grooves arranged at the bottom side of the scraping and washing cylinder body, a water blocking cylinder body extends from the middle part of the bottom side of the scraping and washing cylinder body, a plurality of sealing rings are arranged on the circumferential outer side of the water blocking cylinder body, and the circumferential outer sides of the sealing rings are propped against the inner wall of the sewage discharge outlet. When the scraping and washing barrel rises, the circumferential outer side of the water blocking barrel is directly communicated with the drain outlet, and water flow in the inner side of the outer barrel is guided out from the drain outlet through the drain groove, so that the sewage discharge of the original water cavity is realized.
In the preposed back washing filter, the sewage discharge grooves are annularly arranged at the bottom side of the scraping and washing cylinder body.
In the preposed backwashing filter, an open-close type filter element cleaning component is also arranged between the filter element and the lifting rod body.
In the front backwashing filter, the opening-closing type filter element cleaning component comprises an opening part arranged at the bottom side of the filter element, an annular boss is arranged at the outer side of the circumference of the lifting rod body, the diameter of the annular boss is larger than that of the opening part, and a sealing gasket is arranged between the annular boss and the opening part. After the lifting rod body and the scraping and washing cylinder body are lifted, the annular boss and the opening part are relatively opened, so that the inner side of the filter element can be drained and washed in a backwashing manner, and the water purifying cavity is cleaned.
In the front-mounted backwashing filter, the bottom side of the sewage outlet is also in threaded connection with a sewage discharge pipe guide sleeve, the scraping and washing assembly comprises a sewage scraping strip, and two sides of the sewage scraping strip are respectively abutted against the circumferential outer side of the filter element and the circumferential inner side of the outer cylinder body. Therefore, the filter element and the outer cylinder body can realize dirt scraping and cleaning during backwashing, and the cleaning effect is improved.
Compared with the prior art, the preposed backwashing filter has the advantages that: simple structure, reasonable in design scrapes thereby it can go up and down to scrape the barrel and improve by a wide margin and scrape the washing area, improves and scrapes the washing effect to when scraping the washing barrel and rising, the drain can be directly be linked together with outer barrel inboard, directly realizes the blowdown, need not the manual blowoff valve of opening, and the blowdown is more convenient.
Drawings
FIG. 1 is a schematic view of a half-section structure provided by the present invention;
FIG. 2 is a schematic view of a cartridge and scrub cylinder combination provided by the present invention;
FIG. 3 is a schematic view of the structure of the scraping barrel provided by the present invention
FIG. 4 is a schematic structural diagram of a filter element provided by the present invention
In the figure, an outer cylinder body 1, a water inlet 2, a water outlet 3, a sewage discharge outlet 4, a filter element 5, a scraping and washing cylinder body 6, an end cover 7, a lifting rod body 8, a rotary seat 9, a lifting driving assembly 10, a driving pin 11, a rotary cover 12, a positioning sheet 13, a positioning groove 14, a sewage discharge groove 16, a water blocking cylinder body 17, a sealing ring 18, an open-close type filter element cleaning assembly 19, an opening part 20, an annular boss 21, a sealing washer 22, a sewage discharge pipe guide sleeve 23 and a sewage scraping strip 24.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figures 1-4, the prepositioned backwashing filter comprises a hollow outer barrel 1, wherein the upper end of the outer barrel 1 is connected with an end cover 7 with a water inlet 2 and a water outlet 3, the lower end of the outer barrel 1 is provided with a sewage outlet 4, a cylindrical filter element 5 which is coaxial with the outer barrel 1 is arranged in the outer barrel 1, a filter screen is circumferentially covered on the filter element 5, a raw water cavity which is annular and is communicated with the water inlet 2 is formed on the circumferential outer side of the filter element 5 and the circumferential inner side of the outer barrel 1, a purified water cavity which is communicated with the water outlet 3 is formed on the circumferential inner side of the lifting filter element 5, the filter element 5 and the outer barrel 1 are relatively fixed in the axial direction, a scraping and washing barrel 6 which is positioned in the outer barrel 1 and can axially and reciprocally lift and circumferentially rotate is sleeved on the circumferential outer side of the filter element 5, the scraping and washing barrel 6 is connected with the end cover 7 through a lifting mechanism arranged in the middle of the filter element 5 The circumferential side part of the scraping barrel 6 is provided with a scraping component.
The scraping and washing cylinder body can rotate circumferentially to clean the filter element 5, and the lifting mechanism can lift the scraping and washing cylinder body 6, so that scraping and washing in a larger area can be realized in the axial direction in the rotating process, the cleaning effect is improved, and the cleaning is convenient; after the scraping and washing barrel body 6 is lifted, the sewage discharge port 4 can be directly communicated with the scraping and washing barrel body 6, so that sewage discharge is directly realized, a sewage discharge valve does not need to be manually opened, the sewage discharge efficiency is improved, and the sewage discharge is convenient.
Preferably, the lifting mechanism comprises a lifting rod body 8 penetrating through the middle of the filter element 5, one end of the lifting rod body 8 is in threaded connection with a rotating seat 9 on the end cover 7, a lifting driving assembly 10 is further arranged between the rotating seat 9 and the end cover 7, and the other end of the lifting rod body 8 extends out of the bottom side of the filter element 5 and is fixedly connected with the scraping and washing barrel 6 through a plug-in type circumferential fixing assembly.
The lifting rod body 8 is in threaded connection with the rotary base 9, and the lifting rod body 8 is rotated through the lifting driving assembly 10 to rotate the lifting rod body 8, so that scraping and pollution discharge are realized.
The lifting driving assembly 10 comprises a driving pin 11 which is rotatably connected in the rotary base 9, the lower end of the driving pin 11 is arranged in a pin hole formed in the top side of the lifting rod body 8 in a penetrating mode, the driving pin 11 and the lifting rod body 8 are circumferentially and relatively fixed, the upper end of the driving pin 11 extends out of the rotary base 9, and the upper end of the driving pin is circumferentially and fixedly connected with a rotary cover 12 arranged above the rotary base 9. The driving pin 11 is driven to rotate by rotating the rotary cover 12, then the driving pin 11 drives the lifting rod body 8 to rotate and lift, and the lifting rod body 8 can lift while rotating because the lifting rod body 8 is in threaded connection with the rotary seat 9.
Further, the fixed subassembly of plug-in type circumference is equipped with a plurality of constant head tanks 14 that set up with the corresponding setting of constant head tank 13 including setting up a plurality of constant head tanks 13 on scraping and washing barrel 6 on the body of rod 8, and the constant head tank 14 is pegged graft to the constant head tank 13. The circumferential fixation of the lifting rod body 8 and the scraping and washing barrel 6 can be realized through the positioning grooves 14 and the positioning pieces 13, so that the rotation is smoother, and the combination is convenient.
The positioning grooves 14 and the positioning pieces 13 are respectively in annular arrays, and the lifting rod body 8 and the scraping barrel 6 are coaxially arranged and fastening screws are further arranged between the lifting rod body and the scraping barrel in a penetrating mode. The axial fixation of the lifting rod body 8 and the scraping barrel 6 can be realized through fastening screws.
Furthermore, the sewage discharging structure comprises a plurality of sewage discharging grooves 16 arranged at the bottom side of the scraping and washing barrel 6, a water blocking barrel 17 extends from the middle of the bottom side of the scraping and washing barrel 6, a plurality of sealing rings 18 are arranged on the circumferential outer side of the water blocking barrel 17, and the circumferential outer side of each sealing ring 18 abuts against the inner wall of the sewage discharging port 4.
When the scraping and washing barrel 6 rises, the circumferential outer side of the water blocking barrel 17 is directly communicated with the sewage discharge port 4, and water flow in the inner side of the outer barrel 1 is led out from the sewage discharge groove 16 through the sewage discharge port 4, so that sewage discharge of a raw water cavity is realized.
In addition, the blowdown groove 16 is arranged at the bottom side of the scraping barrel 6 in an annular mode, an open-close type filter element cleaning component 19 is further arranged between the filter element 5 and the lifting rod body 8, the open-close type filter element cleaning component 19 comprises an opening portion 20 formed in the bottom side of the filter element 5, an annular boss 21 is arranged on the circumferential outer side of the lifting rod body 8, the diameter of the annular boss 21 is larger than that of the opening portion 20, and a sealing gasket 22 is further arranged between the annular boss 21 and the opening portion 20.
After the lifting rod body 8 and the scraping and washing cylinder body 6 are lifted, the annular boss 21 and the opening part 20 are relatively opened, so that the inner side of the filter element 5 can be drained and washed in a backwashing manner, and the clean water cavity is cleaned.
The bottom side of drain 4 has still the spiro union to have a blow off pipe guide pin bushing 23, scrapes and washes the subassembly including scraping dirty strip 24, scrapes the both sides of dirty strip 24 and supports respectively and lean on in the circumference outside of filter core 5 and the circumference inboard of outer barrel 1, consequently filter core 5 and outer barrel 1 homoenergetic can realize scraping dirty cleanness when the back flush, improve clean effect.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although terms such as the outer cylinder 1, the water inlet 2, the water outlet 3, the sewage draining exit 4, the filter element 5, the scraping cylinder 6, the end cover 7, the lifting rod 8, the rotary seat 9, the lifting driving assembly 10, the driving pin 11, the rotary cover 12, the positioning sheet 13, the positioning groove 14, the sewage draining groove 16, the water-blocking cylinder 17, the sealing ring 18, the open-close type filter element cleaning assembly 19, the opening part 20, the annular boss 21, the sealing ring 22, the sewage draining pipe guide sleeve 23, the sewage scraping strip 24 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (9)
1. A front-mounted backwashing filter comprises a hollow outer barrel body (1), wherein the upper end of the outer barrel body (1) is connected with an end cover (7) with a water inlet (2) and a water outlet (3), the lower end of the outer barrel body (1) is provided with a sewage discharge outlet (4), a filter element (5) which is cylindrical and is coaxially arranged with the outer barrel body (1) is arranged in the outer barrel body (1), the filter element (5) is circumferentially covered with a filter screen, a raw water cavity which is annular and is communicated with the water inlet (2) is formed between the circumferential outer side of the filter element (5) and the circumferential inner side of the outer barrel body (1), the circumferential inner side of the filter element (5) forms a water purifying cavity communicated with the water outlet (3), and the front-mounted backwashing filter is characterized in that the filter element (5) and the outer barrel body (1) are relatively fixed in the axial direction, the circumferential outer side of the filter element (5) is sleeved with a scraping and washing barrel body (6) which is, the scraping and washing barrel (6) is connected with the end cover (7) through a lifting mechanism arranged in the middle of the filter element (5), a sewage discharge structure which can be communicated with the sewage discharge outlet (4) when the scraping and washing barrel (6) is lifted is arranged at the bottom side of the scraping and washing barrel (6), and scraping and washing components are arranged at the circumferential side part of the scraping and washing barrel (6);
elevating system including wear to establish the lifting rod body (8) at filter core (5) middle part, the one end of the lifting rod body (8) and roating seat (9) looks spiro union on end cover (7), roating seat (9) and end cover (7) between still be equipped with lift drive assembly (10), the other end of the lifting rod body (8) stretch out in filter core (5) bottom side and link firmly mutually with scraping and washing barrel (6) through plug-in type circumference fixed subassembly.
2. The front backwashing filter of claim 1, wherein the lifting drive assembly (10) comprises a drive pin (11) rotatably connected in the rotary base (9), the lower end of the drive pin (11) is inserted into a pin hole formed in the top side of the lifting rod body (8), the drive pin (11) and the lifting rod body (8) are circumferentially fixed relatively, and the upper end of the drive pin (11) extends out of the rotary base (9) and is circumferentially fixedly connected with a rotary cover (12) arranged above the rotary base (9).
3. The front backwashing filter of claim 2, wherein the plug-in circumferential fixing component comprises a plurality of positioning plates (13) arranged on the scraping cylinder (6), the lifting rod body (8) is provided with a plurality of positioning grooves (14) corresponding to the positioning plates (13), and the positioning plates (13) are plugged in the positioning grooves (14).
4. The front-mounted backwashing filter of claim 3, wherein the positioning grooves (14) and the positioning plates (13) are respectively in an annular array, and the lifting rod body (8) and the scraping cylinder body (6) are coaxially arranged with a fastening screw passing between the lifting rod body and the scraping cylinder body.
5. The front backwashing filter of claim 1, wherein the sewage draining structure comprises a plurality of sewage draining grooves (16) arranged at the bottom side of the scraping cylinder body (6), a water blocking cylinder body (17) extends from the middle of the bottom side of the scraping cylinder body (6), a plurality of sealing rings (18) are arranged at the circumferential outer side of the water blocking cylinder body (17), and the circumferential outer side of each sealing ring (18) is abutted against the inner wall of the sewage draining outlet (4).
6. The pre-backwashing filter of claim 5, wherein the drainage grooves (16) are arranged in a ring shape at the bottom side of the scraping cylinder (6).
7. The front-mounted backwashing filter of claim 1, wherein an open-close type filter element cleaning assembly (19) is further arranged between the filter element (5) and the lifting rod body (8).
8. The front backwashing filter of claim 7, wherein the open-close type filter element cleaning assembly (19) comprises an opening part (20) arranged at the bottom side of the filter element (5), an annular boss (21) is arranged at the circumferential outer side of the lifting rod body (8), the diameter of the annular boss (21) is larger than that of the opening part (20), and a sealing gasket (22) is arranged between the annular boss (21) and the opening part (20).
9. The front backwashing filter of claim 1, wherein a drain guide sleeve (23) is further screwed on the bottom side of the drain outlet (4), the scraping and washing assembly comprises a scraping bar (24), and two sides of the scraping bar (24) are respectively abutted against the circumferential outer side of the filter element (5) and the circumferential inner side of the outer cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920716884.9U CN211158795U (en) | 2019-05-17 | 2019-05-17 | Front-mounted backwashing filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920716884.9U CN211158795U (en) | 2019-05-17 | 2019-05-17 | Front-mounted backwashing filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211158795U true CN211158795U (en) | 2020-08-04 |
Family
ID=71787825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920716884.9U Active CN211158795U (en) | 2019-05-17 | 2019-05-17 | Front-mounted backwashing filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN211158795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112169405A (en) * | 2020-11-11 | 2021-01-05 | 玉环市红日阀门有限公司 | Front filter |
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2019
- 2019-05-17 CN CN201920716884.9U patent/CN211158795U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112169405A (en) * | 2020-11-11 | 2021-01-05 | 玉环市红日阀门有限公司 | Front filter |
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